TECHNICAL FIELD
The present disclosure relates to an exterior switch assembly of a vehicle. More
specifically, the present disclosure relates to a switch assembly used to lock /unlock
vehicle’s door without using a key or without using remote switch of a passenger car
or any other vehicle.
BACKGROUND OF THE DISCLOSURE
In present times, a new feature for entry or exit in or from the car without using key or
battery operated remote has been demanded by the end users in the market. To
facilitate effortless opening and closing of vehicle’s door, a switch is required to be
provided near the door handle keeping in mind the operating ease. As this switch is
required to be fitted over external body of the vehicle, water and dust proof structure
is essentially required. Referring to Figures 1a and 1b, in existing switches for this
application has an epoxy filled structure from backside to restrict entry of dust and
water. At the switch side, a resilient rubber wall was formed between knob and
housing through double shot injection moulding for rubber and thermoplastic material
simultaneously. Since the epoxy is a hazardous substance for environment and human
being and therefore its uses in automotive industries is always desired to be minimal.
Further, existing switch utilizes complex and costlier double shot moulding
manufacturing process for the resilient rubber wall formed between knob and housing.
As shown in Figures 1a and 1b in existing switches, a steel cover was kept in
interference with the housing. The steel cover locked the PCB in place and prevented
the PCB from coming out.
BRIEF DESCRIPTION OF FIGURES
Figure 1a-1b illustrates the existing exterior switches.
Figure 2 illustrates the top view of the exterior switch assembly according to an
embodiment of the present disclosure.
3
Figure 3 illustrates an exploded view of the exterior switch assembly according to an
embodiment of the present disclosure.
Figure 4a-4b illustrates the isometric view of the complete assembly of exterior
switch assembly according to an embodiment of the present disclosure.
Figure 5a illustrates the sectional view of the exterior switch assembly in noswitching
condition along section A-A according to an embodiment of the present
disclosure.
Figure 5b illustrates the sectional view of the exterior switch assembly in noswitching
condition along section B-B according to an embodiment of the present
disclosure.
Figure 5c the sectional view of the exterior switch assembly along section C-C
according to an embodiment of the present disclosure.
Figure 6 illustrates the exterior switch assembly where wire harness is insert moulded
with bottom cover according to an embodiment of the present disclosure.
Figure 7 illustrates a sectional view of the exterior switch assembly according to
another embodiment of the present disclosure.
Figure 8 illustrates a sectional view of the exterior switch assembly along section A1-
A1 according to another embodiment of the present disclosure.
Figure 9 illustrates an exploded view of the exterior switch assembly according to
another embodiment of the present disclosure.
Figure 10a illustrates the top view of the exterior switch assembly according to
another embodiment of the present disclosure.
Figure 10b shows the perspective view of another embodiment of the exterior switch
assembly.
Figure 11 illustrates a sectional view of the exterior switch assembly along section EE
according to another embodiment of the present disclosure.
4
Figures 12a-12b illustrates a sectional view of the exterior switch assembly along
section A-A according to another embodiment of the present disclosure.
Figure 13 illustrates a sectional view of the exterior switch assembly along section BB
according to another embodiment of the present disclosure.
Figure 14 illustrates a sectional view of the exterior switch assembly along section CC
according to another embodiment of the present disclosure.
Figure 15 illustrates a sectional view of the exterior switch assembly along section DD
according to another embodiment of the present disclosure.
Figure 16 illustrates an alternate embodiment of the exterior switch assembly where
epoxy is used in the bottom cover.
Figures 17 and 18 illustrate a sectional view of the exterior switch assembly along
sections A-A and D-D respectively according to an alternate embodiment of the
present disclosure.
SUMMARY
Accordingly the present invention relates to a switch assembly comprising a housing,
comprising a first open end, a second open end and a hollow region defined there
between for accommodating a PCB assembly and a tact switch. A first cover is
secured to the first end of the housing and a second cover being secured to the second
end of the housing.
In an embodiment of the present disclosure, the first cover comprises a central
portion, a peripheral portion extending longitudinally from the central portion and a
flange portion extending laterally from the peripheral portion.
In an embodiment of the present disclosure, the housing comprises a collar portion
extending laterally inwardly and located between the first and second ends of the
housing.
In an embodiment of the present disclosure, the flange portion of the rubber cover is
interposed between the collar portion of the housing and the back cover.
5
In an embodiment of the present disclosure, the back cover is provided with plurality
of apertures for extending there through wires for making electrical connection with
the PCB assembly.
In an embodiment of the present disclosure, in each of the apertures, a rubber sealing
is disposed around the wire.
In an embodiment of the present disclosure, the central portion and the peripheral
portion of the first cover are coupled to an intermediate flexible portion for allowing
movement of the central portion about the peripheral portion in the longitudinal
direction.
In an embodiment of the present disclosure, the back cover is provided with an
opening for extending there through wires for making electrical connection with the
PCB assembly.
In an embodiment of the present disclosure, the opening is covered by Epoxy around
the wires.
In an embodiment of the present disclosure, a switch assembly comprises a housing
comprising a first open end, a second open end and a hollow region defined there
between for accommodating a PCB assembly and a tact switch. A first cover being
secured to the first end of the housing; the top cover assembly comprising a push
button, a rubber grommet sealingly secured with the first end of the housing and with
the push button and a second cover being secured to the second end of the housing.
In an embodiment of the present disclosure, the housing comprises a collar portion
extending laterally inwardly and located between the first and second ends of the
housing.
In an embodiment of the present disclosure, an O- ring is interposed between the
collar portion of the housing and the second cover.
In an embodiment of the present disclosure, an O- ring is interposed between the
second end of the housing and the second cover.
In an embodiment of the present disclosure, the cover is secured with the second end
of the housing by means of snap locks.
In an embodiment of the present disclosure, the back cover is provided with plurality
of apertures for extending there through wires for making electrical connection with
the PCB assembly.
6
In an embodiment of the present disclosure, in each of the apertures, a rubber sealing
is disposed around the wire.
DESCRIPTION OF PRESENT DISCLOSURE
While the invention is susceptible to various modifications and alternative forms,
specific embodiment thereof has been shown by way of example in the figures
and will be described in detail below. It should be understood, however that it is not
intended to limit the invention to the particular forms disclosed, but on the contrary,
the invention is to cover all modifications, equivalents, and alternative falling within
the spirit and the scope of the invention as defined by the appended claims.
Before describing in detail embodiments it may be observed that the novelty
and inventive step that are in accordance with the present invention resides exterior
switch assembly of vehicles. It is to be noted that a person skilled in the art can be
motivated from the present invention and modify the various constructions of
assembly, which are varying from vehicle to vehicle. However, such modification
should be construed within the scope and spirit of the invention. Accordingly, the
drawings are showing only those specific details that are pertinent to understanding
the embodiments of the present invention so as not to obscure the disclosure with
details that will be readily apparent to those of ordinary skill in the art having
benefit of the description herein.
The terms “comprises”, “comprising”, or any other variations thereof, are intended
to cover a non-exclusive inclusion, such that a setup, device that comprises a
list of components does not include only those components but may include other
components not expressly listed or inherent to such setup or device. In other
words, one or more elements in a system or apparatus proceeded by “comprises… a”
does not, without more constraints, preclude the existence of other elements or
additional elements in the system or apparatus.
Accordingly, it is an aim of the present disclosure is to provide a switch assembly that
can be used for locking or unlocking vehicle’s door without using a key or without
using remote switch of a passenger car or any other vehicle. Another aim of the
7
present disclosure is to provide a switch assembly which addresses at least one of the
problems associated with the existing switch.
Figures 2, 3, 4(a)-(b), illustrate a top view and a perspective of the exterior switch
assembly (100) according to an embodiment of the present disclosure. In an
embodiment, the exterior switch assembly (100) of the present disclosure may be
mounted on doors or side doors of the vehicle. However, the exterior switch assembly
(100) may be modified for the other applications without departing from the scope of
the present disclosure.
Referring to Figures 3, 4(a)-(b) and 5(a)-(d), the exterior switch assembly (100)
comprises a housing (101) having a first open end (101a) and a second open end
(101b). The housing (101) comprises a hollow region (101c) defined between the first
open end (101a) and the second open end (101b). The switch assembly (100)
comprises a PCB assembly (104) and a tact switch (105) which are accommodated in
the hollow region (101c). The tact switch (105) is mounted on the PCB assembly
(104).
The switch assembly (100) comprises a first cover (103) assembly and a second cover
(106) assembly.
The first cover (103) assembly is securable to the first open end (101a) of the housing
(101) and adapted to cover the first open end (101a) of the housing (101) for
preventing entry of external contaminants such as dust and water. The second cover
(106) assembly is securable to the second open end (101b) of the housing (101).
Referring to Figures 4(a) and 5(a)-(d), the first cover (103) assembly comprises a push
button (107) and a rubber grommet (108). The rubber grommet (108) is sealingly
secured with the first open end (101a) of the housing (101) and with the push button
(107). In an embodiment, outer peripheral edge (108a) of the rubber grommet (108) is
insert-moulded into the housing (101) (See Details A and B Figure 5(b)). This
moulding of rubber prevents it from detaching during operation. After the rubber is
moulded with the housing (101), inner peripheral edge (108a) of the rubber grommet
(108) is attached to the push button (107) by interference fit. An appropriate
interference is kept between the push button (107) and the rubber (108) so that no
8
water or dust enters the switch. The push button (107) can be used for actuating the
tact switch (105) for the operation of the exterior switch assembly (100).
Referring to Figures 4(a) and 5(a)-(d), the second cover (106) assembly may be
secured to the second open end (101b) of the housing (101) by means of snap locks
(109). As show in Figure 5(a), two snap locks (109) between the housing (101) and
the second cover (106) assembly are provided. These snap lock firmly lock the
housing and the second cover assembly. The said locking also ensures that all the
internal components such as PCB sub-assembly (104), tact switch (105) etc. are held
internally under vibrations and other external stress.
Referring to Figures 5(a)-(d), the housing comprises a collar portion (110) extending
laterally inwardly. The term ‘laterally’ herein refers to a direction perpendicular to the
axis X-X shown in Figure 5(a). The collar portion (110) is located between the first
end (101a) and the second end (101b) of the housing (101). In an embodiment, an Oring
(111) received in the housing (101) from second open end (101b), may be located
on the collar (110) of the housing (101). The O ring (111) may be interposed between
the second cover (106) assembly and the collar (110). Thus, the O ring (111) is held
between the second end (101b) of the housing (101) and second cover (106)
assembly.
Referring to Figures 3 and 4(a)-(b), the second cover (106) assembly comprises a
plurality of apertures (112) for extending there through wires (113) for making
electrical connections with the PCB assembly (104). In each of the apertures (112), a
rubber cover (114) is provided for enclosing the wire (113) passing through the
aperture of the second cover (106) for the purpose of sealing. Alternatively, any other
suitable rubber sealing may be disposed in the aperture around the wire (113). The
wires (113) extending through the apertures of the second cover (106) assembly are
soldered to the PCB assembly (104). The wire harness is soldered at locations (120)
on the PCB as shown in Figure 5(a)-(b). Two wires are soldered to the PCB subassembly
(104) which carry the output from the switch (100).
The rubber covers being inserted, in apertures, between the wire (113) and the second
cover (106) assembly prevent water and dust from entering into the switch. An
intentional interference may be provided between the rubber cover (114), wire (113)
9
and second cover (106) assembly so that entry of external contaminants into the
switch is prevented. In an embodiment, a tie wrap (115) tightly may be used to tie the
wires (113) to the second cover.
Figure 5(a), shows the switch assembly (100) in OFF condition i.e. when the push
(107) button is in un-pressed condition. The directions of the double arrows indicate
the locations where dust and water protection are provided. By moulding the rubber
grommet (108) with the housing (101), entry of water or dust into the switch (100) is
constrained. The rubber grommet (108) also provides an additional return force to the
push button (107) and the operational feel of the switch (100) is increased. In an
embodiment, the thickness of this rubber grommet ranges from 0.7mm to 1mm.
Referring to Figures 5(a)-(b), the O-ring (111) is kept under compression between the
collar (110) or the housing (101) and second cover (106) assembly so that the entry of
water and dust is restricted. The double arrows in the Figures 5(a)-5(b) represent the
locations around the switch assembly (100) at which where dust and water protection
is provided by the O-ring (111) and rubber grommet (108). The PCB assembly (104)
is firmly held in the housing between O-ring (111), push button and second cover
assembly. Since the motion of the PCB sub-assembly (104) is restricted, the
movement of PCB sub-assembly (104) is constrained under external vibrations and
other external stresses/ impact.
Referring to Figures 3 and 5(c), the housing (101) is provided with plurality of ribs
(116a) adapted to cooperate with plurality of slots (116b) formed in the push button
(107) so that push button (107) is slidable in the housing (101). Fig 5(d) shows a
sectional view taken along D-D of the switch assembly shown in Figure 5(c). Figure
5(d) shows areas of sliding between the push button and the housing. The popping out
of push button (107) is prevented by the housing (101) on the either sides. For this
purpose, a channel (117) is formed at the first end (101a) of the housing (101)
extending laterally inwardly (as shown in Figure 5(d)). The push button (107) is
provided with a flange portion (118) receivable in the said channel (117). It also
shows crushing ribs between second cover assembly and the housing. An intentional
clearance is given between the slider (push button) and the housing (101). This
clearance holds the lubrication and provides a smooth feel to the switch.
10
Figure 5(c) also shows sliding contact areas between the housing (101) and the push
button (107). Sliding is provided on four sides between the housing and the push
button. These sliding ribs smoothly govern the motion of the slider (push button) and
provide the desired feel to the switch.
Referring to Figures 6, 7 and 8, the wires for extending making electrical connections
with the PCB may be insert moulded with the second cover (106) assembly according
to an embodiment of the present disclosure. This prevents the entry of water and dust
from below and also provides strength to the wire harness against external stress.
Figures 9, 10(a)-(b), 11, 12(a)-(b) and 13-15 illustrate exterior switch assembly (200)
according to another embodiment of the present disclosure.
Referring to Figures 9, 11 and 12(a)-(b), the exterior switch assembly (200) comprises
a housing (201) having a first open end (201a) and a second open end (201b). The
housing (201) comprises a hollow region (201c) defined between the first open (201a)
and the second open end (201b). The switch assembly (200) comprises a PCB
assembly (104) and a tact switch (105) which are accommodated in the hollow region
(201c). The tact switch (105) is mounted on the PCB assembly (104).
The switch assembly (200) comprises a first cover assembly and a second cover
assembly.
The first cover (203) assembly is securable to the first open end (201a) of the housing
and adapted to cover the first open end of the housing for preventing entry of external
contaminants such as dust and water. The second cover (206) assembly is securable to
the second open end of the housing.
Referring to Figures 11and 12(a)-(b), the first cover (203) formed of a rubber and also
termed interchangeably as rubber cover (214). The first cover (203) is sealingly
secured with the first end (201a) of the housing (200). The first cover (203) comprises
a central portion (203a), a peripheral portion (203b) and a flange portion (203c). The
peripheral portion (203b) extends laterally from the central portion (203a). The flange
portion (203c) extends longitudinally and laterally from the central portion (203a) of
the rubber cover (214). The term ‘longitudinally’ herein refers to a direction along the
11
axis X’-X’ shown in Figure 12(a). The term ‘laterally’ herein refers to a direction
perpendicular to the axis X’-X’ shown in Figure 12(a).
In an embodiment, the peripheral portion (203b) of the first cover is secured to the
first open end of the housing (201) by insert-moulding (as shown in Figure 13). This
moulding of first cover (203) prevents it from detachment during operation. The
central portion of the first cover (203) has a projection extending longitudinally to
form a push button for actuating the switch assembly (200). The central portion
(203a) and the peripheral portion (203b) are coupled an intermediate flexible portion
(203d) for allowing movement of the central portion (203a) about the peripheral
portion (203b) in the longitudinal direction when an actuation force is applied on the
central portion (203a) by the user. Movement of the central portion (203a) actuates
the tact switch (105) which operates the switch assembly.
Referring to Figures 12(a)-(b), the housing (201) comprises a collar portion (210)
extending laterally inwardly. The collar portion (210) is located between the first end
(201a) and the second end (201b) of the housing (201). In an embodiment, the flange
portion (203c) of the first cover (203) is adapted to abut with the collar portion (210)
of the housing (201). In other words, the collar portion (210) overlaps the flange
(203c) of the first cover (203). As shown Figure 12(a), the flange portion (203c) of
the first cover is interposed between the collar portion of the housing and the second
cover.
Referring to Figure 13and, the second cover (206) may be secured to the second open
end (201b) of the housing (201) by means of snap locks (209). As show in Figure 13,
two snap locks between the housing (201) and the second cover assembly (206) are
provided. These snap locks firmly lock the housing and the second cover assembly.
The said locking also ensures that all the internal components such as PCB subassembly
(104), tact switch (105) etc are held internally under vibrations and other
external stress.
Referring to Figures 12(a) and 15, the second cover assembly (106) comprises a
plurality of apertures (212) for extending there through wires for making electrical
connections with the PCB assembly (104). In each of the apertures, a rubber cover
(114) is provided for enclosing the wire passing through the aperture of the second
12
cover for the purpose of sealing. Alternatively, any other suitable rubber sealing may
be disposed in the aperture around the wire. The wires extending through the
apertures of the second cover assembly are soldered to the PCB assembly. The wire
harness is soldered at locations (220) on the PCB as shown in Figure 15. Two wires
are soldered to the PCB sub-assembly (104) which carry the output from the switch
(200).
The rubber covers (214) being inserted, in apertures, between the wire and the second
cover (206) assembly prevent water and dust from entering into the switch (200). An
intentional interference may be provided between the rubber cover, wire and second
cover assembly so that entry of external contaminants into the switch is prevented. In
an embodiment, a tie wrap tightly may be used to tie the wires to the second cover
(206).
In the switch assembly shown in Figure 2-15, epoxy is not used. Instead of epoxy
second cover (106, 206) and rubber sealing for sealing the switch from bottom side is
used. The cross-sectional view of along section E-E of the switch (100, 200) is shown
in Figure 11. As can be seen from the Figures, the rubber sealing is kept in a
compression of 0.2-0.5mm to prevent water from entering into the switch. As can be
seen from figure Detail C of Figure 11, small circular ribs are provided in the rubber
sealing. These circular ribs are compressed by the wire and form sealing between the
surface of the wire and the inside of the rubber sealing. The compression of these ribs
forms an affective sealing between the wire and the rubber preventing water from
entering into the switch. As shown in Figure 11, these ribs provided layered
protection because each ribs individually is under compression. Multiple circular ribs
are given so that if one rib is stretched and does not grip the wire then the rib above it
will hold on to the wire and prevent water from entering into the switch.
Figures 16-18 illustrate exterior switch assembly (300) according to an alternate
embodiment of the present disclosure
As shown in Figure 18, the exterior switch assembly (300) comprises a housing (301)
having a first open end (301a) and a second open end (301b). The housing (301)
comprises a hollow region (301c) defined between the first open (301a) and the
13
second open end (301b). The switch assembly (300) comprises a first cover (303)
assembly and a second cover (306) assembly.
In an embodiment the rubber sealing around the wires is replaced with epoxy (E) as
shown in Figures 16 and 17 of this embodiment. This embodiment serves as an
alternate design of the currently discussed side door switch. It delineates the potential
use of epoxy in the design, wherein the rubber sealing at the second end of the
housing is replaced with epoxy. Considering the environmentally harmful effects of
epoxy minimum use of epoxy is used.
Some of the advantages of the present disclosure
 The switches are protected from the top by moulded rubber grommet. This not
only prevents the entry of water and dust into the switch but also improves the
operational feel of the switch.
 The side door switch follows the same process where the rubber is moulded
with the body. Entry of water from the bottom of the switch is prevented by
the pressed O-ring. An effective water and dust protection is provided all
around so that water and dust cannot enter the switch in any direction.
 Unlike the existing switches in this category this switch does not make use of
any type of epoxy for sealing or any other purpose. Therefore, these switches
are not only resistant to water and dust but also epoxy free.
 The rubber grommet used around the wires protects the switch against water
ingress.
EQUIVALENTS:
The embodiments herein and the various features and advantageous details thereof are
explained with reference to the non-limiting embodiments in the description.
Descriptions of well-known components and processing techniques are omitted so as
to not unnecessarily obscure the embodiments herein. The examples used herein are
intended merely to facilitate an understanding of ways in which the embodiments
herein may be practiced and to further enable those of skill in the art to practice the
14
embodiments herein. Accordingly, the examples should not be construed as limiting
the scope of the embodiments herein.
The foregoing description of the specific embodiments will so fully reveal the general
nature of the embodiments herein that others can, by applying current knowledge,
readily modify and/or adapt for various applications such specific embodiments
without departing from the generic concept, and, therefore, such adaptations and
modifications should and are intended to be comprehended within the meaning and
range of equivalents of the disclosed embodiments. It is to be understood that the
phraseology or terminology employed herein is for the purpose of description and not
of limitation. Therefore, while the embodiments herein have been described in terms
of preferred embodiments, those skilled in the art will recognize that the embodiments
herein can be practiced with modification within the spirit and scope of the
embodiments as described herein.
Throughout this specification the word “comprise”, or variations such as “comprises”
or “comprising”, will be understood to imply the inclusion of a stated element, integer
or step, or group of elements, integers or steps, but not the exclusion of any other
element, integer or step, or group of elements, integers or steps.
The use of the expression “at least” or “at least one” suggests the use of one or more
elements or ingredients or quantities, as the use may be in the embodiment of the
disclosure to achieve one or more of the desired objects or results.
Any discussion of documents, acts, materials, devices, articles and the like that has
been included in this specification is solely for the purpose of providing a context for
the disclosure. It is not to be taken as an admission that any or all of these matters
form a part of the prior art base or were common general knowledge in the field
relevant to the disclosure as it existed anywhere before the priority date of this
application.
The numerical values mentioned for the various physical parameters, dimensions or
quantities are only approximations and it is envisaged that the values higher/lower
than the numerical values assigned to the parameters, dimensions or quantities fall
15
within the scope of the disclosure, unless there is a statement in the specification
specific to the contrary.
While considerable emphasis has been placed herein on the particular features of this
disclosure, it will be appreciated that various modifications can be made, and that
many changes can be made in the preferred embodiments without departing from the
principles of the disclosure. These and other modifications in the nature of the
disclosure or the preferred embodiments will be apparent to those skilled in the art
from the disclosure herein, whereby it is to be distinctly understood that the foregoing
descriptive matter is to be interpreted merely as illustrative of the disclosure and not
as a limitation.
16
We Claim:
1. A switch assembly comprising:
a housing comprising
a first open end,
a second open end and
a hollow region defined there between for accommodating a
PCB assembly and a tact switch;
a first cover being secured to the first end of the housing;
a second cover being secured to the second end of the housing.
2. The switch assembly as claimed in claim 1 wherein, the first cover comprises:
a central portion,
a peripheral portion extending longitudinally from the central portion;
and
a flange portion extending laterally from the peripheral portion .
3. The switch assembly as claimed in any one of the preceding claims, wherein
housing comprises a collar portion extending laterally inwardly and located
between the first and second ends of the housing.
4. The switch assembly as claimed in any one of the preceding claims, wherein
the flange portion of the first cover is interposed between the collar portion of
the housing and the second cover.
5. The switch assembly as claimed in any one of the preceding claims, wherein
the back cover is provided with plurality of apertures for extending there
through wires for making electrical connection with the PCB assembly.
6. The switch assembly as claimed in any one of the preceding claims, wherein,
in each of the apertures, a rubber sealing is disposed around the wire.
7. The switch assembly as claimed in any one of the preceding claims wherein
the central portion and the peripheral portion of the first cover are coupled to
17
an intermediate flexible portion for allowing movement of the central portion
about the peripheral portion in the longitudinal direction
8. A switch assembly as claimed in any one of the claims 1, wherein the back
cover is provided with an opening for extending there through wires for
making electrical connection with the PCB assembly.
9. A switch assembly as claimed in any one of the preceding claims, wherein, the
opening is covered by Epoxy around the wires.
10. A switch assembly comprising:
a housing comprising
a first open end,
a second open end and
a hollow region defined there between for accommodating a
PCB assembly and a tact switch;
a first cover being secured to the first end of the housing; the top cover
assembly comprising
a push button
a rubber grommet sealingly secured with the first end of the
housing and with the push button;
a second cover being secured to the second end of the housing.
11. A switch assembly as claimed in claim 9, wherein the housing comprises a
collar portion extending laterally inwardly and located between the first and
second ends of the housing.
12. A switch assembly as claimed in claims 9-10, wherein an O- ring is interposed
between the collar portion of the housing and the second cover.
13. A switch assembly as claimed in claims 9 and 12, wherein an O- ring is
interposed between the second end of the housing and the second cover.
18
14. A switch assembly as claimed in claim 9, wherein the cover is secured with
the second end of the housing by means of snap locks.
15. . A switch assembly as claimed in claim 9, wherein the back cover is provided
with plurality of apertures for extending there through wires for making
electrical connection with the PCB assembly.
16. A switch assembly as claimed in claim 9, wherein, in each of the apertures, a
rubber sealing is disposed around the wire.