FIELD OF THE INVENTION:
The present invention generally relates to construction of rear brake switch for incorporation
in an automotive vehicle.
BACKGROUND TO THE INVENTION:
In vehicles, it is a common practice to include multiple electrical circuits providing different
types of functions, for example an ignition function, an engine kill function, a horn function,
a blinker (turn indicator) function, a head light on function, a low beam function, a high beam
function, a pass function, a brake light function, a door open indication function and the like.
Depending upon the type of function, switches of different construction are incorporated in
the vehicle.
More particularly, it is a common practice to include a brake light which is in electrical
connection with an electrical source through one or more switches. For example, in a
motorcycle, a scooter, a three wheeler, an electrical two wheeled vehicle, an electrical three
wheeled vehicle and the like, the brake light is in electrical connection with an electrical
source via a parallel combination of a front brake light switch and a rear brake light switch.
The front brake light switch is activated by a hand operated brake lever and the rear brake
light switch is activated by a foot operated brake pedal or a hand operated brake lever, and
when a user applies pressure to either the hand operated brake lever or foot operated brake
pedal, a respective switch will close to illuminate the brake light.
An exploded view of a most commonly available rear brake switch 100 is illustrated in figure
1. The rear brake switch (100) comprises a hollow body (101) defining a first end (102) and a
second end (103) located opposite the first end. An external surface (104) of the body
proximate to the first end is provided with threading (105). A lock nut (106) is adapted to cooperate
with the threading (105) so as to mount the rear brake switch at a desired location on
the vehicle (not illustrated). A moving member is located within the hollow body. The
moving member comprises a plunger (107) defining a first end (108) and a second end (109).
The first end (108) of the plunger (107) traverses through the first end (102) of the hollow
body (101) and is adapted to be linked to a brake as provided in the vehicle for receiving an
actuating force. Proximate to the second end (109) of the plunger a cylindrical strip of metal
(110) is formed to function as a moving contact element. A spring member (111) is
positioned surrounding the plunger (107) so as to provide a returning force for returning the
plunger to a normal state in the absence of the actuating force. A spring stopper (112) is
positioned within the hollow body (101) and proximate to the first end (102). A washer (113)
is positioned within the hollow body (101) and proximate to the first end (102). A sealing
plunger (114) is connected to external surface (104) of the body (101) and proximate to the
first end (102). The washer (113) and the sealing plunger (114) are to restrict entry of any
contaminants via the first end (102) of the body (101).
A pair of fixed contacts (115) having a wires (116) extending in a rearward direction are
located around a spacer element (117) such that the fixed contacts are diametrically opposite
to each other and a part of the fixed contact is protruding out of the spacer element in front
and a rear direction. The spacer element (117) along with the fixed contacts (115) is then
inserted into the second end (103) of the hollow body (101) such that the part of the fixed
contact protruding out of the spacer element in the front direction is accommodated within
the hollow body (101) and comes in contact with the moving contact in an actuated state of
the switch.
To prevent ingress of contaminants into the hollow body from the second end, a sealing
grommet (118) is connected to external surface (104) of the body (101) and proximate to the
second end (103). The sealing grommet is retained in its place using a locking clip (119).
Additionally, the wires are also covered using a wire harness assembly (120).
The rear brake switch 100 as described above is riddled with many problems. For example, it
can be seen that to prevent ingress of contaminants, about four elements namely the washer
(113), the sealing plunger (114), the sealing grommet (118) and the wire harness assembly
(120). Use of multiple components, increases the cost of the rear brake switch. Also, a time
taken for manufacturing the rear brake switch is substantially high because of the time taken
to assemble the four elements.
It has also been observed that over a prolonged period of use, the fixed contacts are not in a
continuous abutting relation with the moving contact in the actuated state. This causes
flickering of the rear brake light, thereby causing damage to the tail light and putting the life
of the vehicle occupants in danger.
SUMMARY OF THE INVENTION:
This summary is provided to introduce a selection of concepts in a simplified form that are
further described below in the detailed description. This summary is not intended to identify
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key or essential features of the claimed subject matter, nor is it intended to be used as an aid
in determining the scope of the claimed subject matter.
In accordance with a first aspect of the present invention, there is provided a rear brake
switch comprising:
 a hollow body defining a first end and a second end;
 a moving member located within the hollow body and traversing through the first end
of the hollow body, the moving member comprising a plunger and a cylindrical strip
of metal functioning as a moving contact element, the plunger defining a first end and
a second end, the first end being adapted to receive an actuating force, the cylindrical
strip of metal being provided proximate to the second end of the plunger; and
 a sealing cum spacer element flush fitting into the second end of the hollow body;
wherein the sealing cum spacer element accommodating a pair of fixed contact elements
having a wires connected thereto such that the fixed contact elements come in contact with
the moving contact in an actuated state of the switch.
In accordance with an embodiment, the rear brake switch further comprises a spring member
positioned surrounding the plunger so as to provide a returning force for returning the plunger
to a normal state in the absence of the actuating force.
In accordance with another embodiment, the rear brake switch further comprises a spring
stopper positioned within the hollow body and proximate to the first end.
In accordance with yet another embodiment, the first end of the hollow body accommodates a
washer for restricting entry of a contaminant via the first end.
In accordance with still another embodiment, the first end of the hollow body is attached to a
sealing plunger for restricting entry of a contaminant via the first end.
In accordance with a further embodiment, an external surface of the body proximate to the
first end is provided a mounting means.
In accordance with a furthermore embodiment, the mounting means includes threading
provided on the external surface of the body and a lock nut co-operating with the threading.
5
In accordance with another embodiment, the sealing cum spacer element is in the form of a
solid member comprising a pair of apertures.
In accordance with yet another embodiment, each of the apertures include a first portion
adapted to contact the wire connected to the fixed contact element and a second portion
adapted to securely hold the fixed contact element.
In accordance with still another embodiment, an inner surface of the first portion in each of
the apertures is provided with at least one protrusion, wherein a diameter of the aperture at
the protrusion is less than a diameter of the wire.
In accordance with a first aspect of the present invention, there is provided a rear brake
switch comprising:
 a hollow body defining a first end and a second end;
 a moving member located within the hollow body and traversing through the first end
of the hollow body, the moving member comprising a plunger defining a first end and
a second end, the first end being adapted to receive an actuating force, the second end
being hollow in nature and accommodating a spring loaded contact element; the
second end defining an aperture for allowing the spring loaded contact element to
protrude out and act as a moving contact; and
 a spacer element fitting into the second end of the hollow body;
wherein the spacer element accommodates a pair of fixed contact elements having a wires
connected thereto such that the fixed contact elements come in contact with the moving
contact in an actuated state of the switch.
In accordance with an embodiment, the rear brake switch further comprises a spring member
positioned surrounding the plunger so as to provide a returning force for returning the plunger
to a normal state in the absence of the actuating force.
In accordance with another embodiment, the rear brake switch further comprises a spring
stopper positioned within the hollow body and proximate to the first end.
In accordance with yet another embodiment, the first end of the hollow body accommodates a
washer for restricting entry of a contaminant via the first end.
6
In accordance with still another embodiment, the first end of the hollow body is attached to a
sealing plunger for restricting entry of a contaminant via the first end.
In accordance with a further embodiment, an external surface of the body proximate to the
first end is provided a mounting means.
In accordance with a furthermore embodiment, the mounting means includes threading
provided on the external surface of the body and a lock nut co-operating with the threading.
In accordance with another embodiment, the rear brake switch further comprises a sealing
grommet connected to the second end of the body to prevent ingress of contaminants into the
hollow body from the second end.
In accordance with yet another embodiment, the rear brake switch further comprises a wire
harness assembly covering the wires.
In accordance with still another embodiment, the spacer element is adapted to also function
as a sealing element.
In accordance with a further embodiment, the sealing cum spacer element accommodates the
pair of fixed contact elements having wires connected thereto and flush fits into the second
end of the hollow body.
In accordance with a furthermore embodiment, the sealing cum spacer element is in the form
of a solid member comprising a pair of apertures.
In accordance with another embodiment, each of the apertures include a first portion adapted
to contact the wire connected to the fixed contact element and a second portion adapted to
securely hold the fixed contact element.
In accordance with yet another embodiment, an inner surface of the first portion in each of
the apertures is provided with at least one protrusion, wherein a diameter of the aperture at
the protrusion is less than a diameter of the wire.
To further clarify advantages and features of the present invention, a more particular
description of the invention will be rendered by reference to specific embodiments thereof,
which is illustrated in the appended figures. It is appreciated that these figures depict only
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typical embodiments of the invention and are therefore not to be considered limiting of its
scope.
BRIEF DESCRIPTION OF THE FIGURES:
The invention will be described and explained with additional specificity and detail with the
accompanying figures in which:
Figure 1 illustrates an exploded view of a rear brake switch in accordance with the teachings
of prior art;
Figure 2 illustrates an exploded view of a rear brake switch constructed in accordance with an
embodiment of the present invention;
Figure 3 illustrates a front view of the sealing cum spacer element in accordance with an
embodiment of the present invention;
Figure 4 illustrates a detailed view of a portion “A” of the sealing cum spacer element as
illustrated in figure 3 in accordance with an embodiment of the present invention;
Figure 5 illustrates a top view of the sealing cum spacer element in accordance with an
embodiment of the present invention;
Figure 6 illustrates a sectional view of the sealing cum spacer element in accordance with an
embodiment of the present invention;
Figure 7 illustrates a part sectional view of the sealing cum spacer element showing the
compression of the wires in accordance with an embodiment of the present invention;
Figure 8 illustrates an exploded view of yet another rear brake switch constructed in
accordance with an alternative embodiment of the present invention; and
Figure 9 illustrates an exploded view of yet another rear brake switch constructed in
accordance with yet another alternative embodiment of the present invention.
Further, skilled artisans will appreciate that elements in the figures are illustrated for
simplicity and may not have been necessarily been drawn to scale. Furthermore, in terms of
the construction of the device, one or more components of the device may have been
represented in the figures by conventional symbols, and the figures may show only those
specific details that are pertinent to understanding the embodiments of the present invention
so as not to obscure the figures with details that will be readily apparent to those of ordinary
skill in the art having benefit of the description herein.
DESCRIPTION OF THE INVENTION:
8
For the purpose of promoting an understanding of the principles of the invention, reference
will now be made to the embodiment illustrated in the figures and specific language will be
used to describe the same. It will nevertheless be understood that no limitation of the scope of
the invention is thereby intended, such alterations and further modifications in the illustrated
system, and such further applications of the principles of the invention as illustrated therein
being contemplated as would normally occur to one skilled in the art to which the invention
relates.
It will be understood by those skilled in the art that the foregoing general description and the
following detailed description are exemplary and explanatory of the invention 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 invention. 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 invention
belongs. The system, methods, and examples provided herein are illustrative only and not
intended to be limiting.
Embodiments of the present invention will be described below in detail with reference to the
accompanying figures.
9
Now referring to figure 2, there is illustrated an exploded view of a rear brake switch, 200,
constructed in accordance with the first aspect of the invention. The rear brake switch (200)
comprises a hollow body (201) defining a first end (202) and a second end (203) located
opposite the first end. A moving member (204) is located within the hollow body (201). The
moving member comprises a plunger (205) defining a first end (207) and a second end (208).
The first end (207) of the plunger (205) traverses through the first end (202) of the hollow
body (201) and is adapted to be linked to a brake as provided in the vehicle for receiving an
actuating force. Proximate to the second end (208) of the plunger a cylindrical strip of metal
(206) is formed to function as a moving contact element. A spring member (212) is
positioned surrounding the plunger (205) so as to provide a returning force for returning the
plunger to a normal state in the absence of the actuating force. A spring stopper (213) is
positioned within the hollow body (201) and proximate to the first end (202). A washer (214)
is positioned within the hollow body (201) and proximate to the first end (202). A sealing
plunger (215) is connected and proximate to the first end (202) of the body (201). The washer
(214) and the sealing plunger (215) are to restrict entry of any contaminants via the first end
(202) of the body (201).
A pair of fixed contacts (210) having a wires (211) extending in a rearward direction are
located around a sealing cum spacer element (209) such that the fixed contacts are
diametrically opposite to each other and a part of the fixed contact is protruding out of the
spacer element in front and a rear direction. The sealing cum spacer element (209) along with
the fixed contacts (210) is then inserted into the second end (203) of the hollow body (201)
such that the part of the fixed contact protruding out of the spacer element in the front
direction is accommodated within the hollow body (201) and comes in contact with the
moving contact in an actuated state of the switch.
Threading (217) may be provided proximate to the first end (202) of the body (201) and a
lock nut (218) is adapted to co-operate with the threading (217) so as to function as a
mounting element (216) adapted to mount the rear brake switch at a desired location on the
vehicle (not illustrated).
The construction of the sealing cum spacer element is illustrated in greater detail in figures 3
to 7. In particular, referring to figure 3, the sealing cum spacer element (209) comprises a
solid element (301). On the external surface of the solid element, protrusions (302) are
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provided. Referring to figure 4, the protrusions (302) as provided in the sealing cum spacer
element co-operate with the inner surface of the hollow body (201) and more particularly the
inner surface of the hollow body at about its second end, to provide a sealing effect. As
illustrated in figure 5 which is the top view, the sealing cum spacer element (209) further
includes a pair of apertures (501) through which the wires extend in the rearward direction.
Now referring particularly to figure 6, which is a sectional view of the sealing cum spacer
element (209), it can be noticed that each of the apertures (501) include a first portion (601)
adapted to contact the wire connected to the fixed contact element and a second portion (602)
adapted to securely hold the fixed contact element. In particular, an inner surface of the first
portion (601) in each of the apertures is provided with at least one protrusion (603). Referring
to figure 7, which is a part sectional view of the sealing cum spacer element (209) together
with the wires (211), it can be observed that a diameter of the aperture at the protrusion is less
than a diameter of the wire. This allows for providing a further sealing effect such that
contaminants entry along the wires into an internal portion of the rear brake switch is
prohibited. Referring back to figure 6, an inner surface of the first portion (602) in each of the
apertures is provided with at least one protrusion (604) that functions to position and retain
the fixed contact element.
Now referring to figure 8, there is illustrated an exploded view of a rear brake switch, 800,
constructed in accordance with the second aspect of the invention. The rear brake switch
(800) comprises a hollow body (801) defining a first end (802) and a second end (803)
located opposite the first end. A moving member (804) is located within the hollow body
(801). The moving member comprises a plunger (805) defining a first end (806) and a second
end (807). The first end (806) of the plunger (805) traverses through the first end (802) of the
hollow body (801) and is adapted to be linked to a brake as provided in the vehicle for
receiving an actuating force. The second end (807) of the plunger is constructed so as to be
hollow in nature and accommodates a spring loaded contact element (808). The second end
(807) further defines an aperture (809) for allowing the spring loaded contact element (808)
to protrude out and act as a moving contact. The spring loaded contact element comprises a
spring and a pair of contacting elements (not numbered) and the spring continuously applies a
outwardly pushing force on the pair of the contacting elements (to push the same away from
the axis of the plunger (805)).
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A pair of fixed contacts (811) having a wires (812) extending in a rearward direction are
located around a sealing cum spacer element (810) such that the fixed contacts are
diametrically opposite to each other and a part of the fixed contact is protruding out of the
spacer element in front and a rear direction. The sealing cum spacer element (209) along with
the fixed contacts (811) is then inserted into the second end (803) of the hollow body (801)
such that the part of the fixed contact protruding out of the spacer element in the front
direction is accommodated within the hollow body (801) and comes in contact with the
moving contact in an actuated state of the switch.
A spring member (813) is positioned surrounding the plunger (805) so as to provide a
returning force for returning the plunger to a normal state in the absence of the actuating
force. A spring stopper (814) is positioned within the hollow body (801) and proximate to the
first end (802). A washer (815) is positioned within the hollow body (801) and proximate to
the first end (802). A sealing plunger (816) is connected and proximate to the first end (802)
of the body (801). The washer (815) and the sealing plunger (816) are to restrict entry of any
contaminants via the first end (802) of the body (801).
Threading (818) may be provided proximate to the first end (802) of the body (801) and a
lock nut (819) is adapted to co-operate with the threading (818) so as to function as a
mounting element (817) adapted to mount the rear brake switch at a desired location on the
vehicle (not illustrated).
To prevent ingress of contaminants into the hollow body (801) from the second end (803), a
sealing grommet (820) is connected to external surface of the body (801) and proximate to
the second end (803). The sealing grommet is retained in its place using a locking clip (821).
Additionally, the wires are also covered using a wire harness assembly (822).
Now referring to figure 9, there is illustrated an exploded view of a rear brake switch, 900,
constructed in accordance with yet another aspect of the invention. The rear brake switch
(900) comprises a hollow body (901) defining a first end (902) and a second end (903)
located opposite the first end. A moving member (904) is located within the hollow body
(901).
The moving member (904) comprises a plunger (905) defining a first end (906) and a second
end (907). The first end (906) of the plunger (906) traverses through the first end (902) of the
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hollow body (901) and is adapted to be linked to a brake as provided in the vehicle for
receiving an actuating force. The second end (907) of the plunger is constructed so as to be
hollow in nature and accommodates a spring loaded contact element (908). The second end
(907) further defines an aperture (909) for allowing the spring loaded contact element (908)
to protrude out and act as a moving contact. The spring loaded contact element comprises a
spring and a pair of contacting elements (not numbered) and the spring continuously applies a
outwardly pushing force on the pair of the contacting elements (to push the same away from
the axis of the plunger (905)).
A pair of fixed contacts (911) having a wires (912) extending in a rearward direction are
located around a sealing cum spacer element (910) such that the fixed contacts are
diametrically opposite to each other and a part of the fixed contact is protruding out of the
spacer element in front and a rear direction. The sealing cum spacer element (910) along with
the fixed contacts (911) is then inserted into the second end (903) of the hollow body (901)
such that the part of the fixed contact protruding out of the spacer element in the front
direction is accommodated within the hollow body (901) and comes in contact with the
moving contact in an actuated state of the switch. The construction of the sealing cum spacer
element (910) is illustrated in greater detail in figures 3 to 7.
A spring member (913) is positioned surrounding the plunger (915) so as to provide a
returning force for returning the plunger to a normal state in the absence of the actuating
force. A spring stopper (914) is positioned within the hollow body (901) and proximate to the
first end (902). A washer (915) is positioned within the hollow body (901) and proximate to
the first end (902). A sealing plunger (916) is connected and proximate to the first end (902)
of the body (901). The washer (915) and the sealing plunger (916) are to restrict entry of any
contaminants via the first end (902) of the body (901).
Threading (918) may be provided proximate to the first end (902) of the body (901) and a
lock nut (919) is adapted to co-operate with the threading (918) so as to function as a
mounting element (917) adapted to mount the rear brake switch at a desired location on the
vehicle (not illustrated). Additionally, the wires (912) may be covered using a wire harness
assembly (920).
While specific language has been used to describe the disclosure, any limitations arising on
account of the same are not intended. As would be apparent to a person in the art, various
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working modifications may be made to the method in order to implement the inventive
concept as taught herein.
The figures 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

We Claim:
1. A rear brake switch comprising:
 a hollow body defining a first end and a second end;
 a moving member located within the hollow body and traversing through the first
end of the hollow body, the moving member comprising a plunger and a
cylindrical strip of metal functioning as a moving contact element, the plunger
defining a first end and a second end, the first end being adapted to receive an
actuating force, the cylindrical strip of metal being provided proximate to the
second end of the plunger;
 a sealing cum spacer element flush fitting into the second end of the hollow body;
 the sealing cum spacer element accommodating a pair of fixed contact elements
having a wires connected thereto such that the fixed contact elements come in
contact with the moving contact in an actuated state of the switch.

2. The rear brake switch as claimed in claim 1 further comprising: a spring member
positioned surrounding the plunger so as to provide a returning force for returning the
plunger to a normal state in the absence of the actuating force.

3. The rear brake switch as claimed in claim 1 further comprising: a spring stopper
positioned within the hollow body and proximate to the first end.

4. The rear brake switch as claimed in claim 1, wherein the first end of the hollow body
accommodates a washer for restricting entry of a contaminant via the first end.

5. The rear brake switch as claimed in claim 1, wherein the first end of the hollow body
is attached to a sealing plunger for restricting entry of a contaminant via the first end.

6. The rear brake switch as claimed in claim 1, wherein an external surface of the body
proximate to the first end is provided a mounting means.

7. The rear brake switch as claimed in claim 6, wherein the mounting means includes
threading provided on the external surface of the body and a lock nut co-operating
with the threading.

8. The rear brake switch as claimed in claim 1, wherein the sealing cum spacer element
is in the form of a solid member comprising a pair of apertures.

9. The rear brake switch as claimed in claim 8, wherein each of the apertures include a
first portion adapted to contact the wire connected to the fixed contact element and a
second portion adapted to securely hold the fixed contact element.

10. The rear brake switch as claimed in claim 9, wherein an inner surface of the first
portion in each of the apertures is provided with at least one protrusion, wherein a
diameter of the aperture at the protrusion is less than a diameter of the wire.

11. A rear brake switch comprising:
 a hollow body defining a first end and a second end;
 a moving member located within the hollow body and traversing through the first
end of the hollow body, the moving member comprising a plunger defining a first
end and a second end, the first end being adapted to receive an actuating force, the
second end being hollow in nature and accommodating a spring loaded contact
element; the second end defining an aperture for allowing the spring loaded
contact element to protrude out and act as a moving contact;
 a spacer element fitting into the second end of the hollow body;
 the spacer element accommodating a pair of fixed contact elements having a wires
connected thereto such that the fixed contact elements come in contact with the
moving contact in an actuated state of the switch.

12. The rear brake switch as claimed in claim 11 further comprising: a spring member
positioned surrounding the plunger so as to provide a returning force for returning the
plunger to a normal state in the absence of the actuating force.

13. The rear brake switch as claimed in claim 11 further comprising: a spring stopper
positioned within the hollow body and proximate to the first end.

14. The rear brake switch as claimed in claim 11, wherein the first end of the hollow body
accommodates a washer for restricting entry of a contaminant via the first end.

15. The rear brake switch as claimed in claim 11, wherein the first end of the hollow body
is attached to a sealing plunger for restricting entry of a contaminant via the first end.

16. The rear brake switch as claimed in claim 11, wherein an external surface of the body
proximate to the first end is provided a mounting means.

17. The rear brake switch as claimed in claim 16, wherein the mounting means includes
threading provided on the external surface of the body and a lock nut co-operating
with the threading.

18. The rear brake switch as claimed in claim 11 further comprising: a sealing grommet is
connected to the second end of the body to prevent ingress of contaminants into the
hollow body from the second end.

19. The rear brake switch as claimed in claim 11, further comprising a wire harness
assembly covering the wires.

20. The rear brake switch as claimed in claim 11, wherein the spacer element is adapted
to also function as a sealing element.

21. The rear brake switch as claimed in claim 20, wherein the sealing cum spacer element
accommodates the pair of fixed contact elements having wires connected thereto and
flush fits into the second end of the hollow body.

22. The rear brake switch as claimed in claim 21, wherein the sealing cum spacer element
is in the form of a solid member comprising a pair of apertures.

23. The rear brake switch as claimed in claim 22, wherein each of the apertures include a
first portion adapted to contact the wire connected to the fixed contact element and a
second portion adapted to securely hold the fixed contact element.

24. The rear brake switch as claimed in claim 23, wherein an inner surface of the first
portion in each of the apertures is provided with at least one protrusion, wherein a
diameter of the aperture at the protrusion is less than a diameter of the wire.