FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10; rule 13] TITLE: “AN ARMREST MECHANISM FOR A SEAT OF A VEHICLE”
Name and Address of the Applicant:
TATA MOTORS PASSENGER VEHICLES LIMITED of Floor 3, 4, Plot-18, Nanavati Mahalaya, Mudhana Shetty Marg, BSE, Fort, Mumbai, Mumbai City, Maharashtra, 400001 India.
Nationality: Indian
The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD
Present disclosure relates in general to the field of automobiles. Particularly, but not exclusively, the present disclosure relates to an armrest of a seat of a vehicle. Further, embodiments of the present disclosure disclose an armrest mechanism to operate the seat of the vehicle.
BACKGROUND
Generally, modern vehicles are equipped with seats such as bucket seats or captain chairs that are adapted accommodate a single occupant. The use of bucket seats or captain chairs enhances seating comfort and provides a comfortable ride to the occupant. Typically, the vehicles equipped with the captain chairs or individual chairs have three rows of seating configuration, where the third row of seats are located behind the second row or middle row of seats. The occupants are required either to tumble down the second row of seats or walk between the right and left captain chairs of the second row to access the third row of seats.
Furthermore, it is also desirable to have a pivoting armrest attached to one or both sides of a seat back in the captain chairs, which typically forms the second row of seats. Such armrests are typically pivotally mounted on the lateral edge of the seat back and pivot between an upstanding vertical stored position that allow the occupant to get in and out of the seat, and a horizontal armrest forming position in which the occupant rest an arm upon the armrest. However, mounting the armrest on the lateral edge of the seat back will obstruct the occupant when accessing the third row of seats, resulting in the ingress and egress process being cumbersome, which is undesired.
Moreover, in many occasions the armrest may stick out even if it is in the unused condition causing space constraints while accessing the third row.
The present disclosure is directed to overcome one or more limitations stated above or any other limitations associated with the conventional braking system.
SUMMARY OF THE DISCLOSURE
One or more shortcomings of the prior art are overcome by a mechanism as claimed and additional advantages are provided through the mechanism as claimed in the present disclosure. Additional

features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.
In a non-limiting embodiment of the disclosure, an armrest mechanism for a seat of a vehicle is disclosed. The armrest mechanism includes a shaft which is connected to a seat and extending away from the seat. Further, the mechanism includes a frame configured to receive the armrest and movably disposed on the shaft, the frame is adapted to displace between a locked position and an unlocked position. Furthermore, a first locking member disposed on the shaft and is configured to restrict displacement of the frame beyond the unlocked position. Additionally, the mechanism includes at least one first resilient member that is disposed on the shaft and connected to the frame. The at least one first resilient member is configured to displace the frame from the locked position to the unlocked position. Further, a push-button is disposed at an end of the shaft and is configured to contact a second locking member. The configuration of the armrest mechanism enables the armrest to be positioned flush with the seat backrest side face due to cavity provided in seat backrest in the locked condition resulting in enhanced cabin space for ingress and egress for occupants.
In an embodiment, the shaft is defined with a first slot to accommodate the first locking member and the second locking member to lock the frame in the locked position.
In an embodiment, the first locking member includes a first locking pin adapted to be accommodated in the first slot. The first locking pin is configured to displace within the slot and adapted to restrict movement of the frame beyond the unlocked position.
In an embodiment, the shaft is defined with a second slot proximal to the end of the shaft, which is adapted to accommodate the second locking member in the unlocked condition of the frame.
In an embodiment, the second locking member includes a second locking pin adapted to be selectively accommodated in the first slot and the second slot.

In an embodiment, the second locking member comprises a lever connected to the second locking pin and is adapted to contact a portion of the push-button to release the second locking pin from the first slot.
In an embodiment, the lever and the second locking pin is coupled to a third resilient member configured to displace the second locking pin into the first slot.
In an embodiment, the mechanism includes a plurality of grooves that are defined on the shaft and extending along the circumference of the shaft. The plurality of grooves are configured to accommodate the first locking pin and the second locking pin corresponding to operation of the frame between a retracted condition and an operated condition.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The novel features and characteristics of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a preferred mode of use, further objectives, and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiments when read in conjunction with the accompanying figures. One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:
Fig. 1 illustrates a perspective view of a seat of a vehicle having an armrest in a locked position, in accordance with an embodiment of the disclosure.
Fig. 2 illustrates an exploded view of an armrest mechanism for the seat of the vehicle, in accordance with an embodiment of the disclosure.
Fig. 3a illustrates a side view of a shaft of the armrest mechanism, in accordance with an embodiment of the disclosure.

Fig. 3b illustrates a perspective view of a first locking member of the armrest mechanism, in accordance with an embodiment of the disclosure.
Fig. 3c illustrates a perspective view of a second locking member of the armrest mechanism, in accordance with an embodiment of the disclosure.
Fig. 4a illustrates a sectional view of the armrest mechanism in the locked position of the armrest, in accordance with an embodiment of the disclosure.
Fig. 4b illustrates a sectional view of the armrest mechanism in the locked position of the armrest and a push-button in a displaced condition, in accordance with an embodiment of the disclosure.
Fig. 4c illustrates a sectional view of the armrest mechanism in an unlocked position of the armrest, in accordance with an embodiment of the disclosure.
Fig. 5a illustrates a perspective view of the seat of the vehicle having the armrest in the unlocked position and a retracted condition, in accordance with an embodiment of the disclosure.
Fig. 5b illustrates a perspective view of the seat of the vehicle having the armrest in the unlocked position and an operated condition, in accordance with an embodiment of the disclosure.
Fig. 5c illustrates a perspective view of the seat of the vehicle having the armrest in the unlocked position and an intermediate condition, in accordance with an embodiment of the disclosure.
The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the system and method illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
The foregoing has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better understood. Additional features and advantages of the disclosure will be described hereinafter which form the subject of the claims of the disclosure. It should be appreciated by those skilled in the art that, the conception and specific embodiments disclosed may be readily utilized as a basis for modifying other assemblies, mechanisms, systems, devices, methods, and processes for carrying out the same

purposes of the present disclosure. It should also be realized by those skilled in the art that, such equivalent constructions do not depart from the scope of the disclosure as set forth in the appended claims. The novel features which are believed to be characteristics of the disclosure, to its system/mechanism, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure.
The terms “comprises”, “comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusions, such that a mechanism, a system, or a device that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device or method. In other words, one or more elements in a system or apparatus proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.
Reference will now be made to the exemplary embodiments of the disclosure, as illustrated in the accompanying drawings. Wherever possible, same numerals have been used to refer to the same or like parts. The following paragraphs describe the present disclosure with reference to Figs. 1-5b.
Fig. 1 illustrates a perspective view of a seat (200) of a vehicle [not shown in Figs] having an armrest (101). In an embodiment, the vehicle may be, including but not limited to a passenger vehicle, a utility vehicle, commercial vehicles, motorcycles, and any other vehicle and other machinery having the armrest (101) with the seat (200). The vehicle may include a cabin that may be configured to accommodate occupants. Further, the seat (200) may be incorporated with the armrest (101) on at least one or both sides of a backrest (201). The armrest (101) may be connected to the seat (200) through an armrest mechanism (100). The armrest mechanism (100) may be adapted to facilitate operation of the armrest (101). In an embodiment, the armrest mechanism (100) may be configured to operate the armrest (101) between a locked position (LP) [as seen in Fig. 1] and an unlocked position (UP) [as seen in Fig. 5a]. In the locked position (LP), the armrest

(101) may be positioned flush with the backrest (201) of the seat (200) and in the unlocked position (UP), the armrest (101) may extend out of the backrest (201) and may be operable to support the occupant. Additionally, the armrest mechanism (100) may also be configured to facilitate displacement of the armrest (101) between a retracted condition (RC) [as seen in Fig. 5a] and an operated condition (OC) [as seen in Fig. 5b]. In the retracted condition (RC), the armrest (101) may facilitate movement of the occupant in and out of the seat (200), and in the operated condition (OC), the armrest (101) may horizontally extend at a required angle from a portion of the backrest (201).
Fig. 2 illustrates an exploded view of the armrest mechanism (100). The armrest mechanism (100) may include a shaft (1) which may be connected to the seat (200) and may extend away from the seat (200). In an embodiment, the shaft (1) may extend from the backrest (201) of the seat (200). Referring to Fig. 3a, the shaft (1) may include an elongated body (1a) which may extend from the backrest (201) of the seat (200) and may be defined with an end away from the backrest (201). The shaft (1) may include a first slot (12) which may be defined along a portion of the elongated body (1a). In an embodiment, the first slot (12) may be in the form of a depression having square edges. Further, the shaft (1) may include a second slot (13) which may be defined at end of the elongated body (1a) away from the backrest (201). In an embodiment, the second slot (13) may be defined with a tapered end which may be tapered in the direction of the first slot (12) and a square edge which may be defined at the end of the elongated body (1a).
Referring back to Fig. 2, the armrest mechanism (100) may include a frame (2) which may be disposed on the shaft (1). The frame (2) may be adapted to receive the armrest (101). In an illustrative embodiment, the frame (2) may be configured to receive an armrest cover (17) which may form the armrest (101) upon being disposed on the frame (2). The armrest cover (17) may include a cushioning material, for example, a foam, that may provide a cushioning effect to the occupant. In an embodiment, the frame (2) may be adapted to horizontally displace along the shaft (1) between the locked position (LP) and the unlocked position (UP) and pivotally displace relative to the shaft (1) between the retracted condition (RC) and the operated condition (OC). In an embodiment, the frame (2) may be defined with a predefined size and shape as per the dimensional requirement of the armrest (101). Further, the armrest mechanism (100) may include a first locking member (3) [as seen in Fig. 3b] which may be disposed on the shaft (1) and may be configured to

restrict displacement of the frame (2) beyond the unlocked position (UP). In an embodiment, the first locking member (3) may be disposed on the shaft (1) between the seat (200) and the frame (2). Furthermore, the first locking member (3) may include a first locking pin (4) which may be adapted to be accommodated within the first slot (12). In an embodiment, the first locking pin (4) may be configured to displace along the first slot (12) corresponding to displacement of the frame (2) between the locked position (LP) and the unlocked position (UP). The first locking pin (4) may be configured to abut a first edge (12a) of the first slot (12) corresponding to the frame (2) being positioned at the locked position (LP). Further, the first locking pin (4) may be configured to abut a second edge (12b) of the first slot (12) corresponding to the frame (2) being positioned at the unlocked position (UP) and may restrict displacement of the frame (2) beyond the unlocked position (UP).
In an embodiment, the backrest (201) of the seat (200) may be defined with an armrest cavity (202) to receive and accommodate the armrest (101) [as seen in Fig. 5b]. The frame (2) and in-turn the armrest (101) may be adapted to be positioned within the armrest cavity (202) in the locked position (LP). The armrest cavity (202) enables the armrest (101) to be positioned flush with a side surface of the backrest (201) of the seat (200) [as seen in Fig. 1]. Further, the frame (2) and in-turn the armrest (101) may be adapted to be positioned out of the armrest cavity (202) in the unlocked position (LP) [as seen in Fig. 5a] such that the armrest may be operated between the retracted condition (RC) and the operated condition (OC).
Further, as seen in Fig. 2, the armrest mechanism (100) may include at least one first resilient member (8). The at least one first resilient member (8) may be disposed on the shaft (1) and may be connected to the frame (2). In an embodiment, the at least one first resilient member (8) may be disposed on the shaft (1) between the seat (200) and the frame (2). In an embodiment, the at least one first resilient member (8) may be including but not limited to a helical spring, a coil spring, wave spring and the like which may be disposed individually or may be a combination of multiple number of springs. The at least one first resilient member (8) may be configured to bias the frame (2) towards the unlocked position (UP), that is, the at least one first resilient member (8) may be configured to displace the frame (2) from the locked position (LP) to the unlocked position (UP). Additionally, the armrest mechanism (100) may include a cover member (15). The cover

member (15) may be disposed on the shaft (1) and may be configured to accommodate and cover the at least one first resilient member (8) and the first locking member (3).
Referring now to Figs. 2, 3a, 3c and 4a, the armrest mechanism (100) may include a push-button (11) which may be disposed at an end of the shaft (1). The push-button (11) may be configured to contact a second locking member (5). The second locking member (5) may be disposed on the shaft (1) between the end of the shaft (1) and the frame (2), away from the first locking member (3). Upon operation of the push-button (11), the contact between the push-button (11) and the second locking member (5) may vertically displace the second locking member (5) to unlock the frame (2) from the locked position (LP). Further, the push-button (11) may include a provision (11a) which may be adapted to contact the second locking member (5) and may displace the second locking member (5). In an embodiment, the provision (11a) may be integrally formed on the push¬button (11) or may be fixed to the push-button (11). Furthermore, the armrest mechanism (100) may include at least one second resilient member (9). The at least one second resilient member (9) may be disposed on the shaft (1) between the frame (2) and the push-button (11). In an embodiment, the at least one second resilient member (9) may be including but not limited to a helical spring, a coil spring, wave spring and the like which may be disposed individually or may be a combination of multiple number of springs. The at least one second resilient member (9) may be configured to bias the button away from the frame (2), such that after operation of the push-button (11), that is, after the push-button (11) may be pushed for operation [as seen in Fig. 4b], the at least one second resilient member (9) may displace the push-button (11) back to an original position [as seen in Fig. 4c].
In an embodiment, the armrest mechanism (100) may include a carrier (18) which may be disposed on the shaft (1). The carrier (18) may be configured to provide support to the push-button (11) and the at least one second resilient member (9) on the shaft (1). That is, the push-button (11) and the at least one second resilient member (9) may be configured to displace relative to the carrier (18) upon operation of the push-button (11).
Further, as seen in Fig. 3c, the second locking member (5) may include a second locking pin (6) which may be adapted to be selectively accommodated within the first slot (12) and the second slot (13). In an embodiment, the second locking member (5) that may be accommodated within

the first slot (12) and the second slot (13) may be configured to selectively restrict displacement of the frame (2) in the locked position (LP) [as seen in Fig. 4a] and the unlocked position (UP) [as seen in Fig. 4c], respectively. In an embodiment, the second locking pin (6) may be configured to displace out of the first slot (12) and into the second slot (13) corresponding to displacement of the frame (2) between the locked position (LP) and the unlocked position (UP). The second locking pin (6) may be configured to abut the second edge (12b) of the first slot (12) corresponding to the frame (2) being positioned at the locked position (LP). Further, the second locking pin (6) may be configured to displace out of the first slot (12) and reside within the second slot (13) corresponding to the frame (2) being positioned at the unlocked position (UP) and may restrict displacement of the frame (2) beyond the unlocked position (UP). Additionally, as seen in Figs. 4a-4c, the second locking member (5) may include a lever (7) which may connected to and may extend away from the second locking pin (6). The lever (7) of the second locking member (5) may be adapted to contact a portion of the push-button (11) to release the second locking pin (6) from the first slot (12). In an embodiment, the second locking pin (6) and the lever (7) may be integrally. Furthermore, the second locking member (5) may include a third resilient member (10) which may be coupled between the second locking pin (6) and the lever (7). The third resilient member (10) may be configured to bias the second locking pin (6) towards the shaft (1) or the first slot (12) and/or the second slot (13), such that, the second locking pin (6) may be automatically displaced back into at least one of the first slot (12) and the second slot (13) after operation of the push¬button (11). Additionally, as the third resilient member (10) may also be configured to displace the lever (7) back to the original position after being displaced by the push-button (11). In an embodiment, the third resilient member (10) may be including but not limited to a helical spring, a coil spring, wave spring and the like which may be disposed individually or may be a combination of multiple number of springs.
Referring again to Fig. 2, the armrest mechanism (100) may include a trim (19) which may be disposed on the shaft (1) and the frame (2). The trim (19) may be configured to cover gaps or the components of the armrest mechanism (100) such that the aesthetics of the armrest (101) may be enhanced.
Further, as seen in Fig. 3a, the armrest mechanism (100) may include a plurality of grooves (14) which may be defined on the shaft (1). The plurality of grooves (14) may extend along the

circumference of the shaft (1). In an illustrative embodiment, the shaft (1) may be defined with two grooves (14) where one groove may extend from an end of the first slot (12) and another groove may extend from the second slot (13). The plurality of grooves (14) may be configured to accommodate and receive the first locking pin (4) and the second locking pin (6) from the first slot (12) and the second slot (13), corresponding to operation of the frame (2) between the retracted condition (RC) and the operated condition (OC). That is, the plurality of grooves (14) facilitate rotational displacement of the frame (2) between the retracted condition (RC) and the operated condition (OC) due to relative displacement of the first locking pin (4) and the second locking pin (6). Further, as seen in Fig. 2, the armrest mechanism (100) may include a fourth resilient member (16) which may be connected between the shaft (1) and the frame (2). In an embodiment, the fourth resilient member (16) may be positioned within a cavity defined that may be defined in the frame (2). In an embodiment, the fourth resilient member (16) may be including but not limited to a helical spring, a coil spring, wave spring and the like. The fourth resilient member (16) may be configured to bias the frame (2) towards the operated condition (OC), that is, to an intermediate condition (IC) [as seen in Fig. 5c] such that the armrest (101) in the unlocked position (UP) may automatically tilt towards the operated condition (OC) for easy access of the occupant. That is, the fourth resilient member (16) may be configured to displace the frame (2) from the retracted condition (RC) to the intermediate condition (IC) [as seen in Fig. 5c], where the intermediate condition (IC) may be between the retracted condition (RC) and the operated condition (OC).
In an embodiment, the construction and the configuration of the armrest mechanism (100) provides flush fitting of the armrest (101) within the seat (200) in the locked position (LP). The flush fitting of the armrest (101) within the seat (200) enhances the cabin space within the vehicle thereby facilitating easy ingress and egress for the occupants. Further, upon operation of the push-button (11), the armrest (101) may automatically displace from the locked position (LP) [flush position] to the unlocked position (UP) for enabling operation of the armrest (101) between retracted condition (RC) and the operated condition (OC).
In an operational embodiment, as seen in Figs. 4a and 1, considering the frame (2) to be positioned in the locked position (LP), that is, the armrest (101) being flush with the seat (200). In the locked position (LP), the first locking pin (4) may be position at the first edge (12a) of the first slot (12) and the second locking pin (6) may be positioned at the second edge (12b) of the first slot (12). In

order to bring the frame (2) or the armrest (101) into the unlocked position (UP), the occupant may have to operate or push the push-button (11). Upon operation or displacement of the push-button (11), the provision (11a) of the push-button (11) may displace and contact the lever (7) of the second locking member (5) to vertically displace the lever (7). In an embodiment, at least one of the provision (11a) and the lever (7) may be defined with a tapered profile such that the contact between the provision (11a) and the lever (7) may lead to vertical displacement of the lever (7). As seen in Fig. 4b, the vertical displacement of the lever (7), in-turn vertically displaces the second locking pin (6). The second locking pin (6) upon vertical displacement displaces out of the first slot (12). The second locking pin (6) out of the first slot (12) removes restriction on the at least one first resilient member (8). The at least one first resilient member (8) may displace the frame (2) from the locked position (LP) to the unlocked position (UP), when the first locking pin (4) is displaced out of the first slot (12). The frame (2) upon being displaced from the locked position (LP) may rest in the unlocked position (UP) due to the contact between the first locking pin (4) with the second edge (12b) of the first slot (12) [as seen in Fig. 4c]. That is, the second locking pin (6) may displace along the first slot (12) from the first edge (12a) to the second edge (12b) corresponding to displacement of the frame (2) from the locked position (LP) to the unlocked position (UP) [as seen in Fig. 5b]. The first locking pin (4) at the second edge (12b) of the first slot (12) restricts further movement of the frame (2) beyond the unlocked position (UP). Simultaneously, the second locking pin (6) which may be displaced out of the first slot (12) may displace along with the frame (2) and may get accommodated within the second slot (13) [as seen in Fig. 4c] due to the biasing force exerted on the second locking pin (6) by the third resilient member (10). The second locking pin (6) which may be accommodated within the second slot (13) may also aid in restricting further movement of the frame (2) beyond the unlocked position (UP). Thus, the armrest mechanism (100) provides automatic displacement of the armrest (101) from the locked position (LP) to the unlocked position (UP) upon operation of the push-button (11). In the unlocked position (UP), the occupant may selectively operate the armrest (101) between the retracted condition (RC) [as seen in Fig. 5b] and the operated condition (OC) [as seen in Fig. 5c] based on requirement.
Further, after use, the armrest (101) may be brought back to the retracted condition (RC) and may be pushed by the occupant from the unlocked position (UP) to the locked position (LP). That is, the occupant may push the frame (2) of the armrest (101) from the unlocked position (UP) to the

locked position (LP). Upon a force being exerted on the frame (2) by the occupant in the direction of the locked position (LP), the second slot (13) may ride over the tapered end of the second slot (13) and out of the second slot (13). Additionally, upon further displacement of the frame (2) towards the locked position (LP), the second locking pin (6) may get accommodated within the first slot (12), abutting the second edge (12b), thereby locking the frame (2) in the locked position (LP). Simultaneously, the first locking pin (4) already in the first slot (12) may displace along the first slot (12) and may rest against the first edge (12a) of the first slot (12). This way, the armrest (101) may be operated back to the locked position (LP) when the armrest (101) is not required by the occupant.
In an embodiment, the armrest mechanism (100) is easy to assemble, manufacture and maintain. Additionally, the armrest mechanism (100) may be adapted to be retrofittable to existing seats.
In an embodiment, the armrest mechanism (100) facilitates adjustment of the armrest (101) as per the occupant’s requirement.
It should be imperative that the construction and configuration of the mechanism (100) and any other elements or components described in the above detailed description should not be considered as a limitation with respect to the figures. Rather, variation to such structural configuration of the elements or components should be considered within the scope of the detailed description.
Equivalents:
With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a

specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”
In addition, where features or aspects of the disclosure are described in terms of Markush groups, those skilled in the art will recognize that the disclosure is also thereby described in terms of any individual member or subgroup of members of the Markush group.

While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting.

Referral Numerals:

Reference Number Description
100 Armrest mechanism
101 Armrest
200 Seat
201 Backrest
202 Armrest cavity
1 Shaft
1a elongated body
2 Frame
3 First locking member
4 First locking pin
5 Second locking member
6 Second locking pin
7 Lever
8 First resilient member
9 Second resilient member
10 Third resilient member
11 Push-button
11a Provision
12 First slot
12a First edge
12b Second edge
13 Second slot
14 Grooves
15 Cover member
16 Fourth resilient member
17 Armrest cover
18 Carrier

19 Trim
RC Retracted condition
OC Operated condition
IC Intermediate condition
LP Locked position
UP Unlocked position

We Claim:
1. An armrest mechanism (100) for a seat (200) of a vehicle, the mechanism (100)
comprising:
a shaft (1) connected to the seat (200) and extending away from the seat (200);
a frame (2) configured to receive the armrest (101) and movably disposed on the shaft (1), the frame (2) is adapted to displace between a locked position (LP) and an unlocked position (UP);
a first locking member (3) disposed on the shaft (1) and configured to restrict displacement of the frame (2) beyond the unlocked position (UP);
at least one first resilient member (8) disposed on the shaft (1) and connected to the frame (2), wherein the at least one first resilient member (8) is configured to displace the frame (2) from the locked position (LP) to the unlocked position (UP); and
a push-button (11) disposed at an end of the shaft (1) and configured to contact a second locking member (5), wherein the push-button (11) displaces the second locking member (5) to unlock the frame (2) from the locked position (LP).
2. The mechanism (100) as claimed in claim 1, wherein the shaft (1) is defined with a first slot (12) to accommodate the first locking member (3) and the second locking member (5) to lock the frame (2) in the locked position (LP).
3. The mechanism (100) as claimed in claim 1, wherein the first locking member (3) includes a first locking pin (4) adapted to be accommodated in the first slot (12).
4. The mechanism (100) as claimed in claim 1, wherein the shaft (1) is defined with a second slot (13) proximal to the end of the shaft (1), adapted to accommodate the second locking member (5) in the unlocked position (UP) of the frame (2).

5. The mechanism (100) as claimed in claim 1, wherein the second locking member (5) includes a second locking pin (6) adapted to be selectively accommodated in the first slot (12) and the second slot (13).
6. The mechanism (100) as claimed in claim 1, wherein the second locking member (5) comprises a lever (7) connected to the second locking pin (6) and is adapted to contact a portion of the push-button (11) to release the second locking pin (6) from the first slot (12).
7. The mechanism (100) as claimed in claim 5, wherein the lever (7) and the second locking pin (6) is coupled to a third resilient member (10) configured to displace the second locking pin (6) into the first slot (12).
8. The mechanism (100) as claimed in claim 1, comprises a plurality of grooves (14) defined on the shaft (1) and extending along the circumference of the shaft (1).
9. The mechanism (100) as claimed in claim 8, wherein the plurality of grooves (14) are
configured to accommodate the first locking pin (4) and the second locking pin (6)
corresponding to operation of the frame (2) between a retracted condition (RC) and an
operated condition (OC).