The present disclosure in general, relates to an automobile-switch assembly and in particular relates to a rocker-switch for an automobile.
Background of Invention
A rocker-switch is a movable-contact based switch. Its assembly is a combination of various parts such as a base member, a housing member, a knob member, a plunger member and a carrier member. The base-member consists of integrated electrical contact points or an electrical unit for various electrical operations and connections. A housing-member comprises a plurality of male and female parts that are snap fitted on to the housing member. The base member is seated over electrical contact-points. An electrical unit is configured with plurality of contact plates such as horizontal contact plate, to aid a switching action of the switch assembly.
A housing-element is configured into a first compartment and a second compartment, wherein the first-compartment houses a knob-member and the second compartment houses the base member. The carrier-member is secured within the second-compartment of base member & operated by a knob-member that is movably-supported by a pivot-arm in the housing-member. The carrier-member is guided in the base-member upon having been assembled.
When the aforesaid rocker-switches are applied as a high/low beam switch for automobiles, the electrical circuits for high/low beam emission and a high-beam indicator are separate and maybe referred as a first and second circuit. The first circuit is used for controlling the beam of the head lamp as hi beam and low beam, and the second circuit is used for the indicating lamp in meter-cluster for showing Hi-beam ON status to operator.
However, it is observed that an OFF position (angle) of the first-circuit and ON position (angle) of the second-circuit are not located on the same-side in reference to the reverse position of an operating torque of the rocker-switch, thereby giving an awkward feeling to the operators, especially when the switch is operated slowly. Given the limited space of rocker switch assembly and non-linear characteristics exhibited by the rocker-switch around a reverse position with click-mechanism, any attempt to correct the positions, i.e. OFF position

(angle) of the first-circuit and ON position (angle) of the second-circuit with respect to point of reversal of torque is extremely-arduous.
Summary
This summary is provided to introduce a selection of concepts in a simplified version that is further described below in the detailed description. This summary is not intended to identify key features or essential features of the present invention, nor is it intended as an aid in determining the scope of the present invention.
The present subject matter refers to a rocker-switch assembly. A detent-profile is located within a housing and is defined by a peak and a recess at both sides of the peak. A knob is pivoted within the housing above the detent-profile at a point offset from a peak of the detent profile. The knob defines two operable-states upon actuation by a user. Further, the assembly comprises a spring-loaded plunger attached to the knob and is configured to traverse the detent-profile upon actuation of the knob. The plunger has a tip defined by at-least one of a radius of about 1.4 to 1.5 times the radius of the peak of the detent profile; and a length of about 0.55 to 0.65 times the length of the detent profile.
Further, the rocker-switch assembly comprises a movable-contact based switching-arrangement to selectively trigger a first-circuit and a second-circuit corresponding to the two actuated states of the knob. The movement of electric-contacts in the switching arrangement is controlled by the traversal of the plunger to enable a triggering of the first-circuit and the second-circuit based upon occurrence of a plurality of plunger-positions between the peak and recess at one side of the peak.
The advantages and details of the present invention will be apparent from the following detailed description and accompanying drawings, which are explanatory only and is not restrictive of the present invention.
Brief Description of the Accompanying Drawings
To further clarify the advantages and features of the present invention, a more particular description of the present invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the present invention and are therefore not

to be considered limiting of its scope. The present invention will be described and explained with additional specificity and detail with the accompanying drawings in which:
Figure 1 illustrates electronic-circuits associated with a prior art dimmer switch in the handlebar-assembly of an automobile.
Figure 2 illustrates a transient-zone and a timing-diagram associated with an operation of the prior-art dimmer-switch of Fig. 1
Figure 3 illustrates an exploded view of a rocker-switch assembly, in accordance with an embodiment of the present subject matter.
Figure 4 illustrates a switching-arrangement within the rocker-switch assembly, in accordance with an embodiment of the present subject matter.
Figure 5 illustrates a timing-diagram for the rocker-switch assembly, in accordance with an embodiment of the present subject matter.
Figure 6 illustrates a transient-zone associated with an operation of the rocker-switch, in accordance with an embodiment of the present subject matter.
Figure 7 illustrates a plunger-profile associated the rocker-switch, in accordance with an embodiment of the present subject matter.
Figure 8 illustrates a plunger-profile associated the rocker-switch, in accordance with an embodiment of the present subject matter.
Figure 9 illustrates a mode of operation of the rocker-switch, in accordance with an embodiment of the present subject matter.
Figure 10 illustrates another mode of operation of the rocker-switch, in accordance with an embodiment of the present subject matter.
It may be noted that to the extent possible like reference numerals have been used to represent like elements in the drawings. Further, those of ordinary skill in the art will appreciate that elements in the drawings are illustrated for simplicity and may not have been necessarily drawn to scale. For example, the dimensions of some of the elements in the drawings may be exaggerated relative to other elements to help to improve understanding of aspects of the present invention. Furthermore, the one or more elements may have been

represented in the drawings by conventional symbols, and the drawings may show only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the drawings with details that will be readily apparent to those of ordinary skill in the art having the benefits of the description herein.
Detailed Description
For the purpose of promoting an understanding of the principles of the present disclosure, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the present disclosure is thereby intended, such alterations and further modifications in the illustrated system, and such further applications of the principles of the present disclosure as illustrated therein being contemplated as would normally occur to one skilled in the art to which the present disclosure relates.
The foregoing general description and the following detailed description are explanatory of the present disclosure and are not intended to be restrictive thereof.
Reference throughout this specification to "an aspect", "another aspect" or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Thus, appearances of the phrase "in an embodiment", "in another embodiment" and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.
The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such process or method. Similarly, one or more devices or sub-systems or elements or structures or components proceeded by "comprises ... a" does not, without more constraints, preclude the existence of other devices or other sub-systems or other elements or other structures or other components or additional devices or additional sub-systems or additional elements or additional structures or additional components.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this present

disclosure belongs. The system, methods, and examples provided herein are illustrative only and not intended to be limiting.
Embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings:
Figure 1 illustrates electronic-circuits associated with a prior-art dimmer switch in the handlebar-assembly of an automobile.
As shown in Fig. 1 (a), LEDs for hi and low beam are connected in series. A constant current supply is supplying current to LED of hi and low beam. In Hi condition, the contact of the first circuit is open and current is supplied to both LEDs. In low beam condition, and the contact of the first circuit is closed to bypass hi LED,
As shown in Fig. 1 (b), with respect to second-circuit, the indicator LED, resistor and battery are connected in series, the indicator LED is generally located in the panel of meter cluster, the contact of the second circuit turns ON when the contact of the first contact turns OFF, to show the status of beam to driver.
Figure 2 illustrates a transient-zone and a timing-diagram associated with an operation of the prior-art dimmer-switch of Fig. 1. More specifically, while Fig. 2a illustrates a transient—region with respect to the operation of the prior art dimmer-switch, Fig. 2b illustrates a timing-diagram with respect to the operation thereof.
Referring Fig. 1 again, the first circuit (of Fig. la) is used for controlling the beam of the head lamp, hi beam and low beam, and the second circuit (of Fig. lb) is used for the indicating lamp in a meter cluster for showing high-beam. An existing rocker-switch assembly is composed of a) Knob with plunger and spring, b) housing with a V slope (i.e. detent profile) for click with plunger, c) Carrier with 2 sets of moving contacts and contact springs, and d) a contact-base with fixed contact. Within the limited space of the switch, it remains a challenge to adjust one or more of following:
Fixed contacts for the first circuit with necessary contact-gap
Fixed contacts for the second circuit with necessary contact-gap
Carrier with 2 moving contacts with a necessary contact gap there-between

Fig. 2a illustrates 'Operating angle vs Operating torque characteristic', wherein there is present a 'transient-zone' at the both side of the reverse point. The reverse point corresponds to the peak of chevron or point of zero-crossing with respect to the detent-profile in the housing. Such point enables a counter-force of operating torque with pin and spring in knob. The reverse point is usually located near the center of the operating angle range by 'ergonomics' reason.
The transient zone of Fig. 2a has a shoulder point A and B, wherein the points A, B correspond to the mutual positions of plunger top and chevron-peak. The operating-torque characteristic has three zones, i.e. Lo zone where operating torque decreases with linearity from highest at Lo position, a transient zone where operating torque decreases without linearity, and a Hi zone where operating torque increases in negative to Hi position where operating torque reaches maximum.
As indicated in Fig.2a, the center of transient zone k3 is set approximately at the center position of operating angle. At ends of both transient zone, operating torque turn from positive to negative or negative to positive, while crossing zero at the chevron peak. The width of transient zone mainly depends on radius of peak of click slope in case, and radius of plunger top.
As indicated in Fig. 2b, an Off-position (angle) of the first circuit and ON position (angle) of the second circuit are not located on the same side with respect to the reverse position of operating torque, thereby often imparting an awkward-feeling to the operators when they operate the switch very slowly.
At least in order to obviate aforesaid drawback, the present subject illustrates a rocker-switch assembly 300 as illustrated by the description of forthcoming figures.
Figure 3 illustrates an exploded view of a rocker-switch assembly 300, in accordance with an embodiment of the present subject matter.
In one non-limiting embodiment of the present disclosure, a switch assembly 300 is a combination of various parts name as a base member 302, a housing member 304, a knob member 306, a plunger member 308 and a carrier member 310. The base member 302 consists of an integrated electrical contact points or an electrical unit for various electrical operations and connections. The housing member 304 comprises a plurality of male and female parts which are snap fitted on to the housing member 304. The base member 302 is

seated over the electrical-contact points or electrical unit provided. The electrical unit is configured with plurality of contact plates such as horizontal contact plate, to aid switching action of the switch assembly 300. The housing element 304 is configured into a first compartment and a second compartment, wherein the first compartment houses the knob-member 306 and the second compartment seats the base member 302. The carrier-member 310 is secured within the second compartment of the base member 302 & operates by the knob member 306 which is supported over a pivot arm in the housing member 304. The carrier member 310 is guided in the base member 302 upon assembly. Additionally, the plunger member 308 plays a key role in imparting a 'click' based feeling of the switch.
Further, the housing member 304 defines the detent-profile (shown in Fig 6 to 10) which is defined by a peak or cliff and a recess at both sides of the peak. As indicated in later-figures, the knob 306 is pivoted within the housing 304 above the detent-profile at a point that is offset from a peak of the detent profile. The knob 306 defines two operable-states (low/high beam) upon a user-actuation.
Figure 4 illustrates a switching-arrangement 302, 310 in the rocker-switch assembly 300, in accordance with an embodiment of the present subject matter. The switching-arrangement 302, 310 comprise the base connector 302 and the carrier 310 that comprises movable contacts 316. The switching-arrangement selectively triggers the first-circuit and the second-circuit corresponding to the two actuated states of the knob. The movement of electric-contacts or the carrier 310 within the switching arrangement 302 is controlled by the traversal of the plunger 308 to enable triggering of the first-circuit and the second-circuit based upon occurrence of a plurality of plunger-positions between the peak and recess at one side of the peak. While the movement of the knob 306 is rotary, however the corresponding movement of the carrier 310 is a sliding motion and in linear direction. The carrier 310 slides within a rail-arrangement provided within the base connector 302.
Fig. 4a illustrates a linearly movable frame 310 or the carrier member 310 comprising a first set of electrical-contacts 316 separated by a first pre-defined gap. Such movable frame 310 is attached to the knob 306 to undergo translation-motion along with the rotation of the knob 306. The carrier member 310 has one pair of moving-contacts 316 with springs 312. The first moving contact 316 is for the first circuit to switch 'Lo' by contacting fixed contact a2 of the base-connector 302 and switch to 'Hi' by contacting the fixed contact 'a3' of the base-connector 302 , while a common contact 'al' is provided at the base connector 302. The

second moving contact 316 is for the second circuit (Hi indicator circuit) to contact the fixed contacts b1 and b2 on the base connector 302, and thereby switch ON the second circuit. Further, the carrier 310 has projection portions at both sides to guide the carrier 310 along guide grooves of the base element 302.
The base connector 302 or the stationary-frame accommodates said movable frame 310 (i.e. the carrier 310) through a guide-rail arrangement to thereby allow sliding of said movable frame 310 with respect to the fixed frame 302 and selectively connect the first with the second set of electrical contacts to trigger either of the first and second circuit based on the operable state of the knob 306, respectively. The base connector 302 in turn is set onto the housing 304 with a snap-fit measure.
More specifically, the base connector 302 has two sets of fixed contacts. The first set of contacts for the first-circuit comprises of a common contact a1, the contact a2 for Lo, and the contact a3 for Hi, with a predefined gap ‘g1’ between a2 and a3.
The second circuit comprises the second set of contacts b1 and b2. Both sets of fixed contacts (a1, a2, a3) and (b1, b2) are separated by an intervening gap ‘g2’ in sliding-direction and located in vertical direction to sliding direction. ‘g1’ and ‘g2’ may be defined as the pre-defined gap with respect to the second type of contacts or fixed-contacts.
Further, the overlap between the first set of electrical contacts 316 and second set of electrical contacts (a1, a2, a3, b1, b2) may be predefined in nature to facilitate triggering of the second circuit at the particular side of peak where the Lo region is located.
Figure 5 illustrates a timing-diagram for the rocker-switch assembly, in accordance with an embodiment of the present subject matter. As may be observed, two states fall on same side of peak of operating load, wherein these two states are:
a) Low Beam off and High beam ON through a bypass-circuit
b) Hi-indicator ON
The pre-defined length of fixed contacts b1 and b2 and pre-defined distance ‘g2’ at-least contribute towards the state “Hi-indicator ON” falling on the a particular side of “peak of operating load” of the plunger or the chevron peak with respect to the detent-profile, said side particular side corresponding to the side of chevron peak where the low beam state or Lo region also falls.
9

An increase in the lengths b1 and b2 of the fixed contacts and a decrease in the gap ‘g2’ is minimized, based on decrement of transient zone as further illustrated in the following Fig. 6.
Figure 6 illustrates a transient-zone associated with an operation of the rocker-switch, in accordance with an embodiment of the present subject matter. More specifically, by setting the position of center of transient zone shifted to ‘Hi’ direction, the width of transient zone is reduced and that of ‘Lo’ region is increased, thereby helping in locating the two switching positions on same side of peak of operating load.
The center of the transient zone (i.e. the peak of operating load) is preferably located to be around center of an operating angle of the knob 306, and all switching position are set outside transient zone. In the present example, the center of transient zone is shifted to Hi position for 6 degrees and is still in line with the ergonomics associated with the operation of the knob 306 .
As illustrated before, to have switching-positions before the peak of operating load, i.e. in left side of transient zone, length of fixed contact for indicator, b1 and b2, are increased by a minimum necessary amount, say ‘k’. Decreasing width of transient zone minimizes the above length increase, which in turn helps in minimizing decrease of contact-gap between fixed contact a1 and fixed contact b1 and b2.
While Fig. 6 (a) depicts the transient zone in actual during the traversal of plunger upon the detent profile, Fig. 6(b) depicts a model of said transient zone through graphical representation. Overall, within the transient zone, h11 corresponds to the shoulder point on the side of Lo side, h3 corresponds to the center of transient zone, and h12 corresponds to the shoulder point on the Hi side.
Now taking into an account of the present rocker switch assembly 300, a Low-Beam contact breaking occurs during change-over operation (as done by rider) from Low to Hi Beam. An external electronic device unit starts the Hi Bulb, immediately upon user actuation. Both of these events occur before the peak-point of operating load (i.e. before arrival of chevron peak of the detent profile). Overall, based upon a combination of a specific certain contact-position in the base connector 302 and a specific plunger position with respect to detent profile, the Hi beam Indicator circuit is turned ON at same side of Lo region, before arrival of peak of the detent profile.
10

In an example, the first electronic circuit (i.e. Lo/Hi beam circuits) may be a double pole double throw (DPDT) circuit, while the Hi indicator circuit may be a single pole single throw circuit (SPST).
Figure 7 illustrates a plunger-profile associated the rocker-switch, in accordance with an embodiment of the present subject matter. More specifically, the plunger profile depicted in Fig. 7 is configured to decrease width of transient zone (as depicted in Fig. 6) by achieving a radius of top of plunger substantially small. In this example, radius h8 denotes the plunger radius and is rendered as 0.25mm, which results in 1.2 degrees of transient zone width. The radius h4 corresponds to conventional plunger.
However, as may be understood, decreasing top-radius h8 of plunger increases the surface pressure at plunger top, which can shorten life. To avoid this, a width of top of the plunger ‘h9’ is increased to cancel increase of surface-pressure. In the present example, the width h9 is increased to double the width h6, which corresponds to conventional plunger.
Accordingly, the plunger angle is acute/sharp which form obtuse angle with the detent profile. Accordingly, the plunger experiences less frictional-force during the traversal and hence stops at discrete positions only. Also, sharp angle plastics plunger with sharp detent profile facilitates a quick contact making and breaking of contact.
Further, the plunger has no tendency to stop at peak of the detent profile, since radius on plunger and peak is very less, thereby resulting in a no-negotiation zone, where plunger may be held. Further, as also depicted in forthcoming Fig. 8, yet another provision to avoid stoppage of plunger at the peak of detent profile is that plunger-axis with respect to detent peak is not co- axial and offset.
Figure 8 illustrates plunger-profile associated the rocker-switch, in accordance with an embodiment of the present subject matter, in accordance with an embodiment of the present subject matter. More specifically, the present Fig. 8 illustrates a relation between the detent profile and plunger-profile to avoid plunger getting stuck at peak point of operation.
In an implementation, the ‘Housing detent-tip radii’ (highlighted in circle in ‘FIG: 8a’) is 40-50% less compare to ‘plunger-profile radii’. Alternatively, the ‘Housing detent angle’ (highlight by arc-arrow in ‘FIG: 8a’) is 40-50% higher compare to ‘plunger profile angle’.
11

In another implementation, the ‘Housing detent peak point’ (highlight by arc-arrow in ‘FIG: 8b’) is offset (1 to 2% of 180°) from hinge-axis (Hinge-axis is ‘joint-point’ of housing-hole axis & plunger-loaded knob pivot axis). In other words, the offset between the pivot of the knob and the peak corresponds to an angular-offset of about 1.8 degrees to 3.6 degrees.
In another implementation, a ‘Plunger Profile length’ (highlight by dark-line in ‘FIG: 8C’) is 35-45% with respect to ‘Housing detent length’ (highlight by dark-line in ‘FIG: 8d’)
At least due to aforesaid, the plunger while traversing the detent-profile crosses the peak from one side to reach another side in a substantial short duration of time to thereby define a substantially short transient-zone.
Figure 9 illustrates a mode of operation of the rocker-switch 300, in accordance with an embodiment of the present subject matter. More specifically, Fig. 9a till Fig. 9f illustrates a relation between a) the triggering of the first-circuit and the second-circuit and b) occurrence of the plurality of plunger-positions at either side of the peak during the traversal of the detent profile as done by the plunger.
Fig. 9a and Fig. 9d depicts a Lo position and accordingly an extreme position of the knob 306 such that the plunger is located at particular position at one side of the chevron peak of the detent profile. While one of the first set of contacts 316 overlap with the contacts a1 and a2, the other one of the first set of contacts 316 does not overlap with b1 and b2 and remain separated.
Fig. 9b and Fig. 9e depicts the actuation of the rocker or dimmer switch 300 by user. Accordingly, the while the plunger is still in Lo region at one side of the peak, the bypass circuit has been activated. Accordingly, Lo beam switches off and Hi beam comes into place, in respect of the first circuit. However, the second circuit or Hi-indicator is still OFF as the plunger is yet to reach it mean position. The first set of contacts 316 neither overlap with the contacts a1 and a2, nor with b1 and b2 at the present stage.
Fig. 9c and Fig. 9f depicts attainment of mean position by the plunger. However, owing to offset between the pivot and chevron peak, the mean position of plunger is also offset from the chevron peak. However, the second circuit or Hi indicator circuit switches ON at such mean position. In other words, one of the movable contacts 316 now contact the fixed contact b1 and b2 at this juncture, while a2 and a3 remain non-contacted. The present position of plunger also corresponds to the shoulder point h11 of Fig. 6a.
12

Figure 10 illustrates further modes of operation of the rocker-switch 300, in accordance with an embodiment of the present subject matter. More specifically, Fig. 10a till Fig. 10d also illustrates the link between a) the triggering of the first-circuit and the second-circuit and b) the occurrence of the plurality of plunger-positions at either side of the peak.
Fig. 10a and Fig. 10c depict peak position, such that plunger now contacts the chevron peak and is not anymore offset therefrom. Accordingly, the present position corresponds to the peak of operating load or point of zero-crossing and accordingly depicts the end of Lo region and beginning of Hi region. The present position of plunger also corresponds to the point h3 of Fig. 6a.
Fig. 10b and Fig. 10d depict position of the plunger on other side of peak and accordingly corresponds to the shoulder point h12 of Fig. 6a. At this point, knob 306 reaches the Hi position corresponding to the dimmer switch 300. While one of the first set of contacts 316 overlap with the contacts a3, the other one of the first set of contacts 316 entirely overlaps with contacts b1 and b2.
Overall, the rocker-switch or dimmer switch 300 as proposed by the present subject matter renders it impossible to stop switch at peak position owing to short transient zone, and thereby prevents the current leakage scenario wherein both Lo beam and Hi beam get unwantedly activated.
Further, while the knob 306 movement is rotary, however the carrier 310 slides in linear-direction. More specifically, a sliding contact-mechanism with carrier 310 and guide rail in the base connector 302 maintains a constant contact-pressure and thereby renders a robust arrangement to prevent leakage-current.
The rocker or dimmer switch assembly 300 of the present subject matter renders a compact-packaging and thereby complies with the limitation of space. In addition, a consistency is rendered with respect to switching angle of two circuits, Hi Indicator and Beam Hi/Lo with respect to Peak of Operating Load. By having the switching angles on the same side to the peak of operating load, the present rocker switch 300 complies with requirements associated with UN R53 or 60 European Regulation, and thereby achieves a mapping between the Headlight & indicator Headlight.
13

The drawings and the forgoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, orders of processes described herein may be changed and are not limited to the manner described herein.
Moreover, the actions of any flow diagram need not be implemented in the order shown; nor do all of the acts necessarily need to be performed. Also, those acts that are not dependent on other acts may be performed in parallel with the other acts. The scope of embodiments is by no means limited by these specific examples. Numerous variations, whether explicitly given in the specification or not, such as differences in structure, dimension, and use of material, are possible. The scope of embodiments is at least as broad as given by the following claims.
Benefits, other advantages, and solutions to problems have been described above with regard to specific embodiments. However, the benefits, advantages, solutions to problems, and any component(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential feature or component of any or all the claims

We claim:

A rocker-switch (300) comprising:
a housing (304);
a detent-profile located within the housing (304) and defined by a peak and a recess at both sides of the peak;
a knob (306) pivoted within the housing (304) above the detent-profile at a point offset from a peak of the detent profile, said knob (306) defining two operable-states upon actuation by a user;
a spring-loaded plunger (308) attached to the knob (306) and configured to traverse the detent-profile upon actuation of the knob (306), said plunger (308) having a tip defined by at-least one of:
a radius of about 1.4 to 1.5 times the radius of the peak of the detent profile; and
a length of about 0.55 to 0.65 times the length of the detent profile; and
a movable-contact based switching-arrangement (302, 310) to selectively trigger a first-circuit and a second-circuit corresponding to the two actuated states of the knob (306), wherein the movement of electric-contacts in the switching arrangement (302, 310) is controlled by the traversal of the plunger (308) to enable:
triggering of the first-circuit and the second-circuit based upon occurrence of a plurality of plunger-positions between the peak and recess at one side of the peak.
2. The switch (300) as claimed in claim 1, wherein the peak of the detent profile denotes a zero-crossing during the reversal of the torque operating upon the plunger (308).
3. The switch (300) as claimed in claim 1, wherein the offset between the pivot of the knob (306) and the peak corresponds to an angular-offset of about 1.8 degrees to 3.6 degrees.
4. The switch (300) as claimed in claim 1, wherein the radius of the tip of the plunger (308) is about 0.25 mm
5. The switch (300) as claimed in preceding claims, wherein the plunger (308) while
traversing the detent-profile crosses the peak from one side to reach another side in a
substantial short duration of time to thereby define a substantially short transient-zone.

6. The switch (300) as claimed in claim 1, wherein the movable-contact based switching-
arrangement (302, 310) comprises:
a linearly movable frame (310) comprising a first set of electrical-contacts (316), said movable frame (310) attached to the knob to undergo translation motion along with the rotation of the knob (306);
and
a stationary-frame (302) comprising a second set of electrical-contacts (al, a2, a3,bl,b2),
wherein said stationary frame (302) accommodates said movable frame (310) through a guide-rail arrangement to thereby allow sliding of said movable frame with respect to the fixed frame (302) and selectively connect the first with the second set of electrical contacts to trigger either of the first and second circuit based on the operable state of the knob (306), respectively.
7. The switch (300) as claimed in claim 6, wherein to enable a link between a) the triggering
of the first-circuit and the second-circuit and b) occurrence of the plurality of plunger-
positions at one side of the peak, the switching arrangement (302, 310) is defined at least one
of:
a first type of contact-gap between the electrical contacts in the first set (316);
a second type of contact-gap among the electrical-contacts in the second set (al,a2, a3,bl,b2);and
a pre-defined length of overlap between the first and second set of electrical contacts.
8. A dimmer switch (300) for handlebar assembly in vehicles, said dimmer-switch (300)
comprising:
a housing (304);
a detent-profile located within the housing (304) and defined by a peak and a recess at both sides of the peak;

a knob (306) pivoted within the housing (304) above the detent-profile at a point offset from a peak of the detent profile, said knob (306) defining a low-beam state and a high-beam indicator state upon actuation by a user;
a spring-loaded plunger (308) attached to the knob (306) and configured to traverse the detent-profile upon actuation of the knob (306), said plunger having a tip defined by at-least one of:
a radius of about 1.4 to 1.5 times the radius of the peak of the detent-profile; and
a length of about 0.55 to 0.65 times the length of the detent profile; and a movable-contact based switching-arrangement (302, 310) to selectively trigger a first-circuit and a second-circuit corresponding to the two actuated states of the knob (306), wherein the movement of electric-contacts in the switching arrangement (302, 310) is controlled by the traversal of the plunger (308) to enable:
triggering of the first-circuit and the second-circuit based upon occurrence of a plurality of plunger-positions between the peak and recess at one side of the peak.
9. The switch (300) as claimed in claim 8, wherein the low-beam circuit comprises:
a first set of LEDs for emitting low beam; and
a bypass-circuit for activating high-beam upon switching-off of the first set of LEDs.
10. The switch (300) as claimed in claim 8, wherein the high-beam indicator circuit comprises an indicator for indicating activation of the high-beam.
11. The switch (300) as claimed in claim 8, wherein the movable-contact based switching-arrangement (302, 310) comprises:
a linearly movable frame (310) comprising a first set of electrical-contacts (316), said movable frame (310) attached to the knob to undergo translation motion along with the rotation of the knob (306);
and
a stationary-frame (302) comprising a second set of electrical-contacts (al, a2, a3,bl,b2),

wherein said stationary frame (302) accommodates said movable frame (310) through a guide-rail arrangement to thereby allow sliding of said movable frame with respect to the fixed frame (302) and selectively connect the first with the second set of electrical contacts to trigger either of the first and second circuit based on the operable state of the knob (306), respectively.
12. The switch (300) as claimed in claim 11, wherein the first set of electrical-contacts (316) are associated with activation of the low-beam circuit and the high-beam indicator circuit and comprises a plurality of movable contacts (316) separated by a pre-defined distance
13. The switch (300) as claimed in claim 11, wherein the second set of electrical-contacts (al, a2, a3, bl, b2) comprises:
a first-type of fixed contact associated with the low-beam circuit; and
a second-type of fixed contact associated with a high-beam indicator circuit.
14. The switch (300) as claimed in claim 8, wherein for achieving a link between a)
triggering of the low-beam circuit and the high-beam indicator circuit, and b) occurrence of a
plurality of plunger-positions between the peak and recess at the one side of the peak, the
switching arrangement (302, 310) comprises:
a) a first type of gap between movable contacts
b) a second type of gap among fixed-contacts;
c) a pre-defined length of overlap between the movable and fixed contacts.
15. The switch (300) as claimed in preceding claims, wherein the switching arrangement
(302, 310) is a combination of:
a double pole double throw (DPDT) switch; and
a single pole-single throw (SPST) switch.