DESC:TECHNICAL FIELD
Present disclosure relates to a door locking, unlocking and opening mechanism. One or more embodiments particularly relates to a vehicle door locking, unlocking and opening mechanism from within the vehicle cabin using a single operating knob.
BACKGROUND OF THE DISCLOSURE
Door locking mechanism in vehicles involves a number of techniques and safety features for locking, unlocking and opening the door. Modern cars are configured with creature comforts such as central locking, power windows, automatic climate control (ACC), central locking etc. provided within the vehicle. These creature comforts involve various complex mechanisms for their functioning and working. The user seated within the vehicle utilizes these various create comforts for a comfortable and hassle free journey in the vehicle from the seated place of the user.
Door locking mechanism nowadays involve complex mechanism and programming to perform various remote operations to protect the vehicle from theft, sabotage and also aid the occupants for escaping from the vehicle in case of a vehicle crash or emergency.
Conventionally, vehicle locking mechanisms involve use of manual locking, unlocking and opening of the vehicle door. The door locking, unlocking and opening mechanism is fitted on to the vehicle door, wherein at least one handle for opening the door is provided on the inside part of the vehicle door. A locking and unlocking knob or button is provided usually on the window sill of the vehicle door or at a reachable point on the inside of the vehicle door for operation of the door within the vehicle cabin. When the vehicle door is closed the user usually operates the locking and unlocking knob or button to secure the door from inside. When the door needs to be opened or when the user needs to enter the vehicle, the user reaches to the handle for opening the door from outside the vehicle when the door is in unlock condition.
During manufacturing of the vehicle, the inside part of the vehicle especially the inner door trims are cut out for the door opening handle and the locking/unlocking knob which leads to additional machining of the vehicle door. Also, the door mechanisms involve additional components and links which would increase the overall costs in manufacturing the vehicle and the entire kerb weight of the vehicle. Also, in many occasions, the locking/unlocking knob is located at one place and the handle for opening the door is located at another place. This causes the user to stretch or reach out to specific parts or handles and then perform the desired operations. This sometimes becomes cumbersome to the user as he or she has to reach out which is stressful. Moreover, the user sometimes forgets to lock the door and this may lead to the door opening unexpectedly during the motion of the vehicle. Also during manufacturing, many cut outs on the inner side of the door has to be performed to accommodate the handles and locking knobs which leads to poor insulation and noise attenuation. Moreover, the cooling of the air conditioning also reduces drastically if there are more cut outs on the inner side of the vehicle door.
Figure 1A illustrates prior art device for door locking, unlocking and door opening mechanism. The device (100’) comprises of a base unit (1’) mounted to the door of the vehicle. The base unit (1’) is provided with a first pivot member (2’) mounted at the bottom portion of the base unit (1’) wherein one end of the first pivot member (2’) is connected to a third actuation link (13’). The third actuation link (13’) is connected to a door locking/unlocking knob (14’) provided with in the vehicle cabin. A second pivot member (5’) is provided at top portion of the base unit (1’) wherein one end of the second pivot member (5’) is pivotally fixed to a second actuation link (6’). The second actuation link (6’) has two ends, wherein one end is provided with a first slotted link (4’) and the other end is fixed to the door opening handle (10’) provided outside the vehicle cabin. The first actuation link (3’) is connected to a door opening inner handle (8’) provided within the vehicle cabin. A latch mechanism (7’) is provided intermediate between a first pivot member (2’) and a second pivot member (5’) wherein the latch mechanism (7’) switches between door locked conditions, door unlocked condition and door open condition. The latch mechanism (7’) consists of a first latch member (11’) which is operated by the second actuation link (6’). The first pivot member (2’) at its pivot point (P’) comprises a second latch member (12’) which operates the second actuation link (6’). The first slotted link (4’) is provided at tip end of the second actuation link (6’).
Figure 1B illustrates a device (100’) for locking, the door of a vehicle wherein the device (100) is in locked condition according to the prior art. During operation, the user actuates the locking/unlocking knob (14’) in a downward direction (DD) and the actuation link (13’) operates the first pivot member in a downward direction. This moves the second latch member (12’) away from first latch member (11’) through the first slotted link (4’). This action pulls the second actuation link (6’) away from the first latch (11’) of the latch mechanism (7’). The second actuation link (6’) does not operate on the first latch (11’) when the door opening handle (10’) is operated from outside the vehicle cabin.
Figure 1C illustrates a device (100’) for unlocking and opening the door of a vehicle wherein the device (100’) is in unlocked condition according to the prior art. When the locking/unlocking knob (14’) provided within the vehicle cabin is operated in an upward direction (UD’), the actuation link (13’) operates the first pivot member upwards and positions the second actuation link (6’) above the first latch (11’) of the latch mechanism (7’). This allows the user to open the door by either operating the inner door handle (8’) or open the door by operating the outer door handle (10’).
In light of the above, there is a need to develop a device for locking, unlocking and opening the door of the vehicle by using a single handle from within the vehicle cabin such that, it is economical and avoids the above mentioned disadvantages.
SUMMARY OF THE DISCLOSURE
The shortcomings of the prior art are overcome and additional advantages are provided through the provision 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 an embodiment of the present disclosure, an integrated door lock mechanism for a vehicle is disclosed, comprising: a base unit, a first pivot member comprising three ends, pivotally mounted to the base unit at a first pivot point. A second pivot member is pivotally mounted to the base unit at a second pivot point, wherein a second actuation link is configured with a second slotted link and is pivotally fixed to one end of the second pivot member. A latch mechanism having a first latch member is configured on the base unit intermediate to the first pivot member and the second pivot member. A first slotted link configured to a second end of the three ends of the first pivot member is provided over the first latch member of the latch mechanism. Linear movement of the first actuation link operates the first slotted link on the latch mechanism to switch the latch mechanism between door locked condition, door unlocked condition and door open condition. The second latch configured on a third end of the three ends of the first pivot member is configured with the second slotted link to move the second actuation link away from the first latch member when the first pivot member is at a predefined angular position, rendering door locked condition.
In an embodiment of the present disclosure, one end of the first actuation link is fixed to the first pivot member at first end and other end of the first actuation link is connected to an operation knob provided within a vehicle cabin.
In an embodiment of the present disclosure, one end of the second actuation link is provided with a second slotted link and other end is fixed to an actuation handle provided outside the vehicle cabin.
In an embodiment of the present disclosure, actuation of the first actuation link in a downward direction switches the latch mechanism to door locked condition from within the vehicle cabin.
In an embodiment of the present disclosure, actuation of the first actuation link in a downward direction moves the second actuation link horizontally, by the second latch member provided on the first pivot member.
In an embodiment of the present disclosure, actuation of the first actuation link in a first upward direction switches the latch mechanism to door unlocked condition from within the vehicle cabin.
In an embodiment of the present disclosure, actuation of the first actuation link in a second upward direction switches the latch mechanism to door open condition from within the vehicle cabin.
In an embodiment of the present disclosure, actuation of the first actuation link in a second upward direction actuates the latch mechanism in a downward direction by the first slotted link provided on the first pivot member.
In an embodiment of the present disclosure, actuation of the second actuation link in the downward direction switches the latch mechanism to door open condition from outside the vehicle cabin.

In an embodiment of the present disclosure, actuation of the second actuation link in a downward direction actuates the latch mechanism in a downward direction by the second actuation link.
In an embodiment of the present disclosure, a method of locking, unlocking and opening door of a vehicle comprising steps of: actuating a first actuation link fixed to a first pivot member in a downward direction for switching a latch mechanism to door lock condition from within a vehicle cabin. Actuating the first actuation link fixed to a first pivot member in a first upward direction for switching the latch mechanism to door unlock condition from within the vehicle cabin. Actuating the first actuation link fixed to a first pivot member in a second upward direction for switching the latch mechanism to door open condition from within the vehicle cabin. Then, actuating a second actuation link fixed to a second pivot member in a downward direction for switching the latch mechanism to door open condition from outside a vehicle cabin.
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 characteristic 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 embodiment 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:
Figure 1A illustrates an integrated door lock mechanism for a vehicle wherein the mechanism is in door open condition according to the prior art.
Figure 1B illustrates an integrated door lock mechanism for a vehicle wherein the device is in locked condition according to the prior art.
Figure 1C illustrates an integrated door lock mechanism for a vehicle wherein the device is in unlocked condition according to the prior art.
Figure 2 illustrates an integrated door lock mechanism for a vehicle according to an exemplary embodiment of the present disclosure.
Figure 3 illustrates an integrated door lock mechanism when the door of the vehicle is in locked condition according to an exemplary embodiment of the present disclosure.
Figure 4 illustrates an integrated door lock mechanism when the door of the vehicle is in unlocked condition according to an exemplary embodiment of the present disclosure.
Figure 5 illustrates an integrated door lock mechanism when the door of the vehicle is in open condition according to an exemplary embodiment of the present disclosure.
Figure 6 illustrates an integrated door lock mechanism when the door of the vehicle is in open condition by operating the outer door handle according to an exemplary embodiment of the present 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 structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION OF THE DISCLOSURE

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 embodiment disclosed may be readily utilized as a basis for modifying or designing other structures 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 spirit and scope of the disclosure as set forth in the appended claims. The novel features which are believed to be characteristic of the disclosure, both as to its organization and method of operation, 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. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, and designed in a wide variety of different configurations, all of which are explicitly contemplated and make part of this disclosure.

Referring now to the drawings wherein the drawings are for the purpose of illustrating an exemplary embodiment of the disclosure only, and not for the purpose of limiting the same.
An integrated door locking mechanism for a vehicle is provided with a base unit. The base unit is secured on to the vehicle door skeleton. A first pivot member and second pivot member is pivotally mounted on the base unit for operation of the door locking mechanism. A first actuation link is configured to first end of the three ends of the first pivot member. A second actuation link is configured with a second slotted link, and is pivotally fixed to one end of the second pivot member. A latch mechanism having a first latch member is configured on the base unit intermediate to the first pivot member and the second pivot member. A first slotted link configured to a second end of the three ends of the first pivot member is provided over the first latch member of the latch mechanism. Linear movement of the first actuation link operates the first slotted link on the latch mechanism to switch the latch mechanism between door locked condition, door unlocked condition and door open condition. The second latch configured on a third end of the three ends of the first pivot member is configured with the second slotted link to move the second actuation link away from the first latch member when the first pivot member is at a predefined angular position, rendering door locked condition.
In an embodiment, door locked condition relates to the door of the vehicle being locked, wherein the second actuation link (6) moves away from the first latch (11) of the latch mechanism (7). Actuating the actuation handle (10) provided outside the cabin of the vehicle does not open the door of the vehicle.
In an embodiment, door unlocked condition relates to the door of the vehicle being unlocked, wherein the second actuation link (6) moves on the first latch (11) of the latch mechanism (7). Actuation of the actuation handle (10) provided outside the cabin of the vehicle, opens the door of the vehicle.
In an embodiment, door open condition relates to the door being unlatched from the hinge provided on the vehicle body for opening the door. The door of the vehicle can be opened by the actuation handle (10) provided outside the cabin of the vehicle or by the operation knob (8) provided within the vehicle cabin.
Figure 2 illustrates an integrated door lock mechanism (100) for a vehicle according to an exemplary embodiment of the present disclosure. The integrated door lock mechanism (100) comprises a base unit (1) which is secured on to a door of the vehicle such that, a protruding lock or spring loaded lock (not shown in figure) engages on to the hook provided on the B-pillar or C-pillar of the vehicle. The base unit (1) comprises a first pivot member (2) pivotally mounted at bottom portion of the base unit (1). A second pivot member (5) is pivotally mounted at top portion of the base unit (1) such that the first pivot member (2) and the second pivot member (5) are located parallel to each other. The first pivot member (2) is pivoted at point (P1) and the second pivot member (5) is pivoted at point (P2), wherein the first pivot member (2) and the second pivot member (5) pivot up to a predefined angular position. The first pivot member (2) consists of three ends, wherein one end of a first actuation link (3) is connected to the first pivot member (2) at first end (X) and other end of the first pivot member (2) is connected to an operation knob (8) provided within the vehicle cabin. In an embodiment, the first actuation link (3) transfers mechanical forces acting on the operation knob (8) to the first pivot member (2). In an embodiment, the first actuation link (3) is fixed to the first pivot member (2) at first end (X) by at least one of welding, brazing, soldering, riveting or any other technique which serves the purpose. In an embodiment, the first actuation link (3) is fixed to the operation knob (8) by at least one of welding, brazing, soldering, riveting or any other technique which serves the purpose.
A latch mechanism (7) is pivotally mounted on to the base unit (1) at pivot point (P3), wherein the latch mechanism (7) is provided in-between the first pivot member (2) and the second pivot member (5). The latch mechanism (7) comprises of a first latch (11) provided at tip end of the latch mechanism (7). The latch mechanism (7) is connected to a protruding lock or spring loaded lock (not shown in figure). The latch mechanism (7) at its pivot point (P3) is connected to a spring loaded mechanism (not shown in figure) provided on the other side of the base unit (1). The latch mechanism (7) is configured to switch between door unlock condition and door open condition. In an embodiment, the latch mechanism (7) when parallel to the first pivot member (2), the door of the vehicle is in unlocked condition. In an embodiment, when the latch mechanism (7) is at an acute angle with respect to the first pivot member (2), the door of the vehicle is in open condition.
A second actuation link (6) is configured with a second slotted link (9), wherein the second actuation link (6) is fixed onto the second pivot member (5). The second actuation link (6) transfers mechanical forces action on the actuation handle (10) on to the latch mechanism (7).
The first pivot member (2) at its second end (Y) is provided with a first slotted link (4), wherein the first slotted link (4) is provided around the first latch (11) of the latch mechanism (7). A second latch (12) is provided at third end (Z) of the first pivot mechanism (2), wherein the second latch (12) is configured to the second slotted link (9). Pivoting of the first pivot member (2) moves the second actuation link (6) horizontally away from the first latch (11) of the latch mechanism (7). In an embodiment, the latch mechanism (7) when parallel to the first pivot member (2), the door of the vehicle is in unlock condition and the second actuation link (6) is provided over the first latch (11) of the latch mechanism (7). The second actuation link (6) at one end is provided with the second slotted link (9) and the other end of the second actuation link (6) is fixed to the actuation handle (10) provided outside the vehicle cabin. In an embodiment, the second pivot member (5) is provided with a resilient member (13), wherein the resilient member (13) is fixed to the base unit (1) so as to retain the movement of the second pivot member (5) to original position. In an embodiment, the resilient member (13) is at least one of spring member, an elastic member or any other member which serves the purpose.
In an embodiment, the actuation handle (10) is provided on the outer part of the vehicle door such that, the actuation handle (10) is at least one of door handle, a lever or any other means which serves the purpose of actuation.
In an embodiment, the operation knob (8) is provided on the window sill of the vehicle door such that, the user can operate it from within the cabin of the vehicle.
Figure 3 illustrates an integrated door lock mechanism (100) when the door of the vehicle is in locked condition. The operation knob (8) is actuated in a downward direction (DD) by the user and the first pivot member (2) actuates in an angular position such that, the second latch (12) moves the second actuation link (6) away from the first latch (11) provided on the latch mechanism (7). The first slotted link (4) upon actuation of the first pivot member (2) moves in an upward direction (UD). The latch mechanism (7) remains in the original position, i.e. in door unlock position. The second actuation link (6) is moved horizontally away from the first latch (11). By actuating the actuation handle (10) from outside the vehicle moves the second actuation link (6) in a downward direction but does not come in contact with the first latch (11) of the latch mechanism (7) thus resulting in no action on unlocking of the door.
Figure 4 illustrates an integrated door lock mechanism (100) when the door of the vehicle is in unlocked condition. The operation knob (8) is actuated in a first upward direction (FUD) by the user from within the vehicle cabin. Upon actuation of the operation knob (8) in a first upward direction (FUD), the first actuation link (3) pivots the first pivot member (2) to original position such that, the first pivot member (2) is parallel to the latch mechanism (7). The second actuation link (6) is over the first latch (11) of the latch mechanism (7). Thus, now operating 10 would result in unlocking of the door. Same is explained in more details using figure 6.
Figure 5 illustrates an integrated door lock mechanism (100) when the door of the vehicle is in open condition. The operation knob (8) is actuated in a second upward direction (SUD) by the user from within the vehicle cabin. Upon actuation of the operation knob (8) in the second upward direction (SUD), the first actuation link (3) pivots the first pivot member (2) such that, the first slotted link (4) provided at second end (Y) of the first pivot member (2) actuates the latch mechanism (7) in a down ward direction. The latch mechanism (7) is switched to the door open condition. The user by operation of the operation knob (8) is able to lock, unlock and open the door of the vehicle.
Figure 6 illustrates an integrated door lock mechanism (100) when the door of the vehicle is in open condition by operating the outer door handle (10). The latch mechanism (7) when parallel to the first pivot mechanism (2) is in the door unlocked condition. The user operates the actuation handle (10) provided outside the vehicle. Upon actuation of the actuation handle (10) the second actuation link (6) moves in a downward direction (DD) and pushes the first latch (11) of the latch mechanism (7) downwards such that, the latch mechanism switches to door open condition. In an embodiment, the user can operate the actuation handle (10) from within the vehicle cabin or from outside the vehicle cabin.
ADVANTAGES
In an embodiment, the integrated door lock mechanism (100) uses the operation knob to lock, unlock and open the door of the vehicle.
In an embodiment, an additional inner door handle mechanism or link is avoided.
In an embodiment, the vehicle cabin inner door trim need no or minimal cut outs as the operation knob provided on the window sill performs the operation of the inner handle.
In an embodiment, manufacturing costs and overall weight of the vehicle is reduced as no additional linkages are used to open the door from within the vehicle cabin.
In an embodiment, the air conditioning and noise attenuation within the vehicle cabin is improved as there are no cut outs on the door inner trims.
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, with the true scope and spirit being indicated by the following claims.
REFERRAL NUMERALS

100 Integrated door lock mechanism
1 Base unit
2 First pivot member
3 First actuation link
4 First slotted link
5 Second pivot member
6 Second actuation link
7 Latch mechanism
8 Operation knob
9 Second slotted link
10 Outer Actuation handle
11 First latch member
12 Second latch member
13 Resilient member
P1 Pivot point
P2 Pivot point
P3 Pivot point
X First end
Y Second end
Z Third end
DD Downward direction
UD Upward direction
FUD First upward direction
SUD Second upward direction
100’ Integrated door lock mechanism (Prior art)
1’ Base unit (Prior art)
2’ First pivot member (Prior art)
3’ First actuation link (Prior art)
4’ First slotted link (Prior art)
5’ Second pivot member (Prior art)
6’ Second actuation link (Prior art)
7’ Latch mechanism (Prior art)
8’ Door opening inner handle (Prior art)
9’ Second slotted link (Prior art)
10’ Outer Actuation handle (Prior art)
11’ First latch member (Prior art)
12’ Second latch member (Prior art)
13’ Third actuation link (Prior art)
14’ Operation knob (Prior art)
P’ Pivot point (prior art)
,CLAIMS:1. An integrated door lock mechanism (100) for a vehicle, comprising:
a base unit (1);
a first pivot member (2) comprising three ends, pivotally mounted to the base unit (1) at a first pivot point (P1), wherein a first actuation link (3) is configured to first end (X) of the three ends of the first pivot member (2);
a second pivot member (5) is pivotally mounted to the base unit (1) at a second pivot point (P2), wherein a second actuation link (6) configured with a second slotted link (9) is pivotally fixed to one end of the second pivot member (5);
a latch mechanism (7) having a first latch member (11) is configured on the base unit (1) intermediate to the first pivot member (2) and the second pivot member (5);
a first slotted link (4) configured to a second end (Y) of the three ends of the first pivot member (2) is provided over the first latch member (11) of the latch mechanism (7), wherein linear movement of the first actuation link (3) operates the first slotted link (4) on the latch mechanism (7) to switch the latch mechanism (7) between door locked condition, door unlocked condition and door open condition; and
the second latch (12) configured on a third end (Z) of the three ends of the first pivot member (2) is configured with the second slotted link (9) to move the second actuation link (6) away from the first latch member (11) when the first pivot member (2) is at a predefined angular position, rendering door locked condition.
2. The mechanism (100) as claimed in claim 1, wherein one end of the first actuation link (3) is fixed to the first pivot member (2) at first end (X) and other end of the first actuation link (3) is connected to an operation knob (8) provided within a vehicle cabin.

3. The mechanism (100) as claimed in claim 1, wherein one end of the second actuation link (6) is provided with a second slotted link (9) and other end is fixed to an actuation handle (10) provided outside the vehicle cabin.
4. The mechanism (100) as claimed in claim 1, wherein actuation of the first actuation link (3) in a downward direction (DD) switches the latch mechanism (7) to door locked condition from within the vehicle cabin.

5. The mechanism (100) as claimed in claim 4, wherein actuation of the first actuation link (3) in a downward direction (DD) moves the second actuation link (6) horizontally, by the second latch member (12) provided on the first pivot member (2).

6. The mechanism (100) as claimed in claim 1, wherein actuation of the first actuation link (3) in a first upward direction (FUD) switches the latch mechanism (7) to door unlocked condition from within the vehicle cabin.

7. The mechanism (100) as claimed in claim 1, wherein actuation of the first actuation link (3) in a second upward direction (SUD) switches the latch mechanism (7) to door open condition from within the vehicle cabin.

8. The mechanism (100) as claimed in claim 7, wherein actuation of the first actuation link (3) in a second upward direction (SUD) actuates the latch mechanism (7) in a downward direction (DD) by the first slotted link (4) provided on the first pivot member (2).

9. The mechanism (100) as claimed in claim 1, wherein actuation of the second actuation link (6) in the downward direction (DD) switches the latch mechanism (7) to door open condition from outside the vehicle cabin.

10. The mechanism (100) as claimed in claim 9, wherein actuation of the second actuation link (6) in a downward direction (DD) actuates the latch mechanism (7) in a downward direction (DD) by the second actuation link (6).

11. A method of locking, unlocking and opening door of a vehicle comprising steps of:
actuating a first actuation link (3) fixed to a first pivot member (2) in a downward direction (DD) for switching a latch mechanism (7) to door lock condition from within a vehicle cabin;
Actuating the first actuation link (3) fixed to a first pivot member (2) in a first upward direction (FUD) for switching the latch mechanism (7) to door unlock condition from within the vehicle cabin;
actuating the first actuation link (3) fixed to a first pivot member (2) in a second upward direction (SUD) for switching the latch mechanism (7) to door open condition from within the vehicle cabin; and
actuating a second actuation link (6) fixed to a second pivot member (5) in a downward direction (DD) for switching the latch mechanism (7) to door open condition from outside a vehicle cabin.