TW202338876A - Switch assembly - Google Patents

Abstract

A switch assembly includes an insulating shell, an electrical module, at least one elastic body and at least one button body. The insulating housing includes at least one key opening. The electrical module is arranged in the insulating housing, and the electrical module includes a circuit board and at least one switch electrically connected with the circuit board. The at least one switch corresponds to at least one key opening. The at least one elastic body is arranged in the insulating housing and located above the at least one switch. The at least one elastic body is exposed to the insulating housing through the at least one opening, and the at least one elastic body can be elastically deformed toward the at least one switch and push the at least one switch. The at least one key body is movably disposed on at least one key opening and supported by the at least one elastic body.

Description

switch assembly

The present invention relates to the technical field of a switch device, and in particular to a switch assembly in which an elastic body supports a key body and the key body presses the elastic member to elastically deform to trigger a switch element.

Switching devices are used in most electronic devices, industrial equipment or daily life facilities. They are usually used to turn on and off circuits in electrical circuits to control whether corresponding electrical components are activated or not. The existing switch device is provided with a button on the outside of the casing, and the button is connected to a switch element provided inside the casing. The user presses the button to trigger the switch element. For example, a double-button switch disclosed in Chinese utility model patent CN209216840U. The two buttons push the bump provided above the switch through the support block connected to the button, thereby triggering the switch.

However, this structure must have a support block extending from the key body on the key, and a bump must be provided above the switch to facilitate triggering the switch. This increases the complexity of the overall structure, and also increases the accuracy required for assembly, which is labor-intensive and time-consuming. . In addition, this structure does not have a waterproof function. If liquids such as water or drinks penetrate through the gap between the button and the housing, it is easy to directly short-circuit or even damage the switch or circuit board.

In view of this, the object of the present invention is to provide a switch assembly in which an elastic body is provided between the switch component of the electrical module and the key body. The elastic body supports the key body, so that the user presses the key body to cause the elastic body to elastically deform. As for the trigger switch part, when the user releases the key body, the elastic body can also support the key body to reset. In this way, as long as the elastic body is provided between the switch member and the key body, the key body can be supported and it can also serve as a trigger switch member. This can simplify the structure of the switch assembly and reduce the accuracy requirements during assembly.

An embodiment of the switch assembly of the present invention includes an insulating housing, an electrical module and at least one elastomer. The insulating housing includes at least one key opening. The electrical module is disposed in an insulating housing. The electrical module includes a circuit board and at least one switch electrically connected to the circuit board. The at least one switch corresponds to at least one key opening. At least one elastic body is disposed in the insulating housing and located above at least one switch. The at least one elastic body is exposed to the insulating housing through at least one opening. The at least one elastic body can elastically deform in a direction approaching the at least one switch and push at least one switch. switch.

In another embodiment, it further includes at least one key body, which is movably disposed in at least one key opening and supported by at least one elastic member.

In another embodiment, the outer peripheral wall of at least one key body has a first flange, the flange abuts the inner wall of the insulating housing, and is provided on the inner wall of the insulating housing and located at the at least one key opening. Stopped by a second flange.

In another embodiment, the insulating housing includes an upper housing and a lower housing. The upper housing and the lower housing are fixedly connected. At least one key opening is provided in the upper housing. The electrical module and at least one elastomer are positioned in the upper housing. The lower shell is provided with a cable opening for a cable to extend into the insulating shell.

In another embodiment, the lower housing includes a positioning groove and a positioning rib provided in the positioning groove. At least one elastic body has a positioning recess, and the positioning recess engages with the positioning rib to position the at least one elastic body. in the positioning slot.

In another embodiment, a first sealing member is provided between the outer peripheral surface of at least one elastic body and the wall surface of the positioning groove.

In another embodiment, the inner peripheral surface of the upper housing surrounds and covers the outer peripheral surface of the lower housing. The outer peripheral surface of the lower housing has a drainage gap, and the drainage gap is adjacent to the positioning recess.

In another embodiment, it further includes an insulating bracket disposed on the lower case, the electrical module is positioned on the insulating bracket, the lower case is provided with a carrier structure located on both sides of the cable opening, and the insulating bracket is disposed on platform structure.

In another embodiment, the insulating bracket includes a bearing part and an extension part. The bearing part is arranged on the platform structure and spans over the cable opening. The extension part extends from the bearing part in a direction close to the cable opening. The circuit The board is arranged on the carrying part and the extending part, at least one switch is located on the carrying part, a plurality of soldering pads of the circuit board are located on the extending part, and the conductors of the cable are welded on the plurality of soldering pads.

In another embodiment, the circuit board is flexible, and the circuit board is folded and disposed on the upper and lower opposite surfaces of the carrying part and extends to the extension part.

In another embodiment, the carrying portion and the extension portion are engaged and positioned with the inner wall of the insulating housing by an engaging structure composed of an engaging protrusion and an engaging recess.

In another embodiment, the stage structure includes a first stage part and a second stage part. The first stage part is higher than the second stage part. The carrying part includes a horizontal body and an inclined body. The horizontal body The body is arranged on the first stage part, the inclined body is connected to the horizontal body and is arranged on the second stage part, and the extension part is connected to the inclined body.

In another embodiment, the electrical module includes two switches, which are respectively arranged corresponding to the horizontal body and the inclined body. The upper housing is provided with two key openings, and the switch assembly includes two elastic bodies and two key bodies.

In another embodiment, it further includes a second sealing member that closes the cable opening and covers the conductor portion of the cable and the soldering pads of the circuit board.

In another embodiment, the second sealing member is filled in the cable opening using low pressure molding.

In another embodiment, at least one elastic body is a silicone cover.

In the switch assembly of the present invention, an elastic body is arranged between the switch member and the key body. The elastic body is located above the switch member and covers the switch member. At the same time, the elastic member supports the key body. When the user presses the key body downward, the elastic body can The component elastically deforms in a direction close to the switch component to trigger the switch component. It is also possible that the key body is not provided, and the user directly presses the elastic body downward to trigger the switch component. In this way, only an elastic body is needed between the key body and the switch part to achieve the function of pressing and triggering the switch part. It is not necessary to set up a more complicated structure between the key body and the switch part as in the prior art, thereby simplifying the switch part. structure, and reduces the accuracy of assembly requirements. At the same time, the elastic parts can be pressed multiple times without being damaged, which can increase the overall service life. In addition, the switch assembly of the present invention uses the first sealing member and the second sealing member disposed on the lower housing to form a sealed state in the space where the electrical module is located. Even if liquid penetrates into the switch assembly, the electrical module can be prevented from getting damp and causing damage. A short circuit or damage has occurred.

Please refer to Figures 1, 2, 3, 4 and 5, which illustrate an embodiment of the switch assembly of the present invention. The switch assembly 1 of this embodiment includes an insulating housing 10 , an electrical module 20 and two elastic bodies 30 . Although the switch assembly 1 of this embodiment exemplifies a double-button switch, the invention is not limited thereto. The structure disclosed in the invention is also applicable to a single-button switch or a multi-button switch with two or more buttons.

The insulating housing 10 includes two key openings 11. The electrical module 20 is disposed in the insulating housing 10. The electrical module 20 includes a circuit board 21 and two switch components 22 electrically connected to the circuit board 21. The two switches The components 22 are arranged adjacently on the circuit board 21 , and the two switch components 22 correspond to the two key openings 11 respectively. The two elastic bodies 30 are disposed in the insulating housing 10 and are not respectively located above the two switch parts 22. The two elastic bodies 30 are exposed from the insulating housing 10 through the two key openings 11. The two elastic bodies 30 can be moved individually. The two switch members 22 are elastically deformed in a direction approaching the two switch members 22 and push the two switch members 22 individually.

The switch assembly 1 of this embodiment also includes two key bodies 40. The two key bodies 40 are respectively disposed in the two key openings 11, and the two key bodies 40 can move along the axial direction of the key openings 11. The key bodies 40 are formed by Elastomer 30 support. The key body 40 may protrude from the insulating housing 10 through the key opening 11 or be at least flush with the surface of the insulating housing 10 . The user presses the key body 40 to move the key body 40 in a direction closer to the switch component 22 and simultaneously pushes the elastic body 30 to cause elastic deformation of the elastic body 30 to trigger the switch component 22 .

Although the switch assembly 1 of this embodiment is provided with a key body 40, in another embodiment, the hard key body 40 may not be provided, so that the elastic body 30 protrudes from the insulating housing 10 and is used as a soft key. The user can directly press the elastic body 30 with fingers to cause the elastic body 30 to elastically deform and trigger the switch member 22 . In an embodiment in which the key body 40 is not provided, the shape of the elastic body 30 can be appropriately designed to match the shape of the insulating housing 10 .

The switch assembly 1 of this embodiment further includes an insulating bracket 50. The circuit board 21 of the electrical module 20 is carried on the insulating bracket 50. The insulating bracket 50 is detachably combined with the insulating housing 10 through snapping or other methods. The electrical module 20 is positioned inside the insulating housing 10 . The structure and function of each component are described in detail below.

The insulating housing 10 of this embodiment includes an upper housing 12 and a lower housing 13. The upper housing 12 has an arc-shaped top wall 121 and an outer peripheral wall 122 connected to the top wall 121. The lower housing 13 has a flat The bottom wall 131, an outer peripheral wall 132 connected to the bottom wall 131, and a protruding lip 133 extending radially outward from the outer peripheral wall 132, the inner surface of the outer peripheral wall 122 of the upper housing 12 and the protruding surface of the lower housing 13 Lip 133 is a conformal fit.

The above two key openings 11 are provided on the top wall 121 of the upper housing 12. The lower housing 13 is provided with a cable opening 14. The cable opening 14 is formed on the bottom wall 131 and the outer peripheral wall 132. A cable C can pass through the cable. Wire opening 14 extends into insulative housing 10 . A drainage structure 134 is respectively provided at a position opposite to the protruding lip 133 of the lower housing 13 . The drainage structure 134 in this embodiment is a drainage gap. In another embodiment, the drainage structure 134 can also be a drainage hole. The lower housing 13 is provided with a positioning structure 135 surrounding the outer peripheral wall 132 at the top of the outer peripheral wall 132 and adjacent to the protruding lip 133 . The positioning structure 135 includes a positioning groove 1351 and a positioning rib 1352 disposed in the positioning groove 135 . . A carrier structure 136 is formed inside the lower housing 13 for carrying the insulating bracket 50 . The stage structure 135 of this embodiment includes a first stage part 1361 and a second stage part 1362 respectively disposed on opposite sides of the cable opening 14 . The first stage part 1361 is higher than the second stage part 1362 .

The circuit board 21 of the electrical module 20 is a flexible printed circuit board (FPC). The two switch components 22 are adjacently disposed on the circuit board 21 and are electrically connected to the circuits of the circuit board 21 . The end of the circuit board 21 is provided with a welding pad 211. The welding pad 211 forms an electrical connection with the switch component 22 through the circuit of the circuit board 21. The welding pad 211 is used for welding the conductor portion C1 of the cable C to form an electrical connection.

The two elastic bodies 30 are connected to each other, and each elastic body 30 is a cover body that covers and covers the switch component 22 of the electrical module 20 . A positioning base 31 is provided around the two elastic bodies 30, and a positioning recess 311 is provided at the edge and bottom of the positioning base 31 (see Figure 5). The positioning base 31 can be made of the same material as the two elastic bodies 30. . The elastic body 30 in this embodiment is injection molded from silicone, thus forming a soft and elastically deformable component.

The key body 40 and the insulating housing 10 can be made of the same material, such as hard plastic. The outer peripheral wall of the key body 40 has at least one first flange 41, and the first flange 41 is in contact with the upper housing 12. The inner wall of the upper housing 12 allows the key body 40 to move along the axial direction of the key opening 11 under the guidance of the inner wall of the upper housing 12 . The inner wall of the upper housing 12 is provided with a second flange 123 extending radially inward at the edge of the key opening 11. The second flange 123 blocks the first flange 41, and the key body 40 is blocked and positioned at The upper casing 12 is provided with the first flange 41 regularly abutting the second flange 123 due to the elasticity of the elastic member 30 .

The insulating bracket 50 of this embodiment includes a bearing part 51 , an extension part 52 and a surrounding part 53 . The bearing part 51 includes a horizontal body 511 and an inclined body 512. The inclined body 512 is connected to the horizontal body 511. The extension part 52 is connected to the inclined body 512 and is perpendicular to the horizontal body 511. The surrounding portion 53 surrounds opposite sides of the horizontal body 511 and the inclined body 512 . The surrounding portion 53 forms a gap 54 on the side of the horizontal body 511 relative to the inclined body 512 . The end of the extending portion 52 forms an engaging recess 521 , and the surrounding portion 53 forms two engaging recesses 531 on the inner surfaces of opposite sides of the portion surrounding the horizontal body 511 . In addition, the surrounding portion 53 is in a form-fitting fit with the inner surface of the outer peripheral wall 132 of the lower housing 13 .

Please refer to FIG. 6 and FIG. 5 together. The circuit board 21 is bent and sandwiched between the upper and lower surfaces of the bearing portion 51 of the insulating bracket 50 . The circuit board 21 extends along the lower surface of the bearing portion 51 to the extension portion 52 . On the surface, the soldering pad 211 is located at the end of the extension part 52 and close to the cable opening 14 of the lower case 13 . The part of the circuit board 21 that carries the switch component 22 is located on the upper surface of the carrying part 51 , and the circuit board 21 is positioned on the carrying part 51 by combining the positioning holes with the positioning posts of the carrying part 51 .

Referring to FIG. 7 , the conductor portion C1 of the cable C is soldered to the soldering pad 211 . Next, please refer to Figure 8, and please also refer to Figure 6. Pass the cable C through the cable opening 14 of the lower case 13, and combine the insulating bracket 50 with the lower case 13, wherein the extension portion 52 of the insulating bracket 50 The engaging recess 521 engages with the engaging protrusion 137 located on the second stage part 1362 of the lower housing 13 , and the engaging recess 531 of the surrounding part 53 of the insulating bracket 50 engages with the engaging protrusions 137 on both sides of the first stage part 1361 The engaging protrusion 138 engages, and at the same time, the notch 54 of the surrounding portion 53 of the insulating bracket 50 engages with the positioning block 139 provided on the first stage portion 1361 of the lower housing 13 . Thereby, as shown in FIG. 5 , the insulating bracket 50 is positioned in the lower housing 13 , and the horizontal body 511 of the bearing portion 51 of the insulating bracket 50 is disposed on the first stage portion 1361 , and the inclination of the bearing portion 51 of the insulating bracket 50 is The body 512 is provided on the second stage part 1362.

Next, please refer to FIG. 9 , using a low pressure injection molding (LPM) process, the plastic material is filled into the space below the insulating bracket 50 and inside the lower case 13 through the cable opening 14 to form a second seal. 60. On the one hand, the second sealing member 60 closes the cable opening 14 to achieve a waterproof effect; on the other hand, the second sealing member 60 covers the conductor portion C1 of the cable C and the soldering pad 211 of the circuit board 21 to fix the cable C to the circuit. Effect of plate 21.

Next, referring to FIG. 10 , a dispensing machine is used to apply waterproof glue, such as ultraviolet curable waterproof glue, on the positioning groove 1351 and the positioning rib 1352 of the positioning structure 135 of the lower housing 13 using a glue dispensing process. Referring to Figure 11, the positioning recess 311 of the positioning base 31 of the elastic member 30 is then engaged with the positioning rib 1352, so that the waterproof glue is solidified, whereby the elastic member 30 is fixed to the lower case 13 and in the position of the elastic member 30. A first seal 70 is formed between the outer peripheral wall of the base 31 and the inner wall of the positioning groove 1351 . In this way, the upper part of the lower case 13 is sealed and waterproof by the first sealing member 70 and the elastic member 30 , and the cable opening 13 at the lower part of the lower case 13 is sealed and waterproof by the second sealing member 60 , so that the lower part where the electrical module 20 is located The space of the housing 13 is completely sealed and waterproof, which can prevent the electrical module 20 from short circuit or corrosion damage caused by water vapor penetration.

Next, please refer to FIG. 12 , the key body 40 is arranged on the elastic body 30 , and then the outer peripheral wall 122 of the upper housing 12 is fitted into the protruding lip 133 of the lower housing 13 , while the key body 40 is exposed through the key opening 11 . In the insulating housing 10, the outer peripheral wall 122 of the upper housing 12 and the protruding lip 133 of the lower housing 13 are fixedly connected, for example, using ultrasonic welding technology. In this way, the switch assembly 1 of the present invention is completed. If liquid (such as water, drinks, etc.) flows into the gap between the key body 40 and the key opening 11, the liquid will flow from the outer peripheral surface of the key body 40 to the surface of the elastic base 31 of the elastic body 30, and then pass through the lower shell. The drainage structure 134 of the protruding lip 133 of the body 13 is used to discharge the switch assembly 1. In order to facilitate the flow of liquid to the drainage structure 134, the top edge of the lower housing 13 and the positioning groove 1351 are inclined near the drainage structure 134, so that the liquid can Rapidly flows to the drainage structure 134 by gravity. The first seal 70 forms a seal between the elastic body 30 and the lower case 13 , so that liquid will not flow into the space where the electrical module 20 is located and damage the electrical module 20 .

In the switch assembly of the present invention, an elastic body is arranged between the switch member and the key body. The elastic body is located above the switch member and covers the switch member. At the same time, the elastic member supports the key body. When the user presses the key body downward, the elastic body can The component elastically deforms in a direction close to the switch component to trigger the switch component. It is also possible that the key body is not provided, and the user directly presses the elastic body downward to trigger the switch component. In this way, only an elastic body is needed between the key body and the switch part to achieve the function of pressing and triggering the switch part. It is not necessary to set up a more complicated structure between the key body and the switch part as in the prior art, thereby simplifying the switch part. structure, and reduces the accuracy of assembly requirements. At the same time, the elastic parts can be pressed multiple times without being damaged, which can increase the overall service life.

In addition, the switch assembly of the present invention uses the first sealing member and the second sealing member disposed on the lower housing to form a sealed state in the space where the electrical module is located. Even if liquid penetrates into the switch assembly, the electrical module can be prevented from getting damp and causing damage. A short circuit or damage has occurred. Moreover, by providing a drainage structure on the lower housing, the liquid can be quickly drained.

However, the above are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention. That is, simple equivalent changes and modifications may be made based on the patent scope of the present invention and the description of the invention. All are still within the scope of the patent of this invention. In addition, any embodiment or patentable scope of the present invention does not necessarily achieve all the purposes, advantages or features disclosed in the present invention. In addition, the abstract section and title are only used to assist in searching patent documents and are not intended to limit the scope of the invention. In addition, terms such as "first" and "second" mentioned in this specification or the patent application are only used to name elements or distinguish different embodiments or scopes, and are not used to limit the number of elements. upper or lower limit.

1: Switch assembly 10: Insulating shell 11:Button opening 12: Upper shell 13: Lower shell 14:Cable opening 20:Electrical module 21:Circuit board 22: switch parts 30: Elastomer 31: Positioning base 40:Button body 41:First edge 50:Insulation bracket 51: Bearing part 52:Extension 53: Surrounding Department 54: Gap 60: Second seal 70:First seal 121:top wall 122:Peripheral wall 123:Second edge 131: Bottom wall 132:Peripheral wall 133:Protruding lips 134: Drainage structure 135: Positioning structure 136: Carrier structure 137:Latching protrusion 138:Latching protrusion 139: Positioning block 211: Solder pad 311: Positioning recess 511: Horizontal body 512:Tilted body 521: Engagement recess 531: Engagement recess 1351: Positioning slot 1352: Positioning rib 1361:First Stage Department 1362:Second Stage Department C: Cable C1: Conductor part

Figure 1 is a perspective view of an embodiment of the switch assembly of the present invention. FIG. 2 is an exploded perspective view of the switch assembly of FIG. 1 . FIG. 3 is a top view of the switch assembly of FIG. 1 . FIG. 4 is a cross-sectional view along line A-A of FIG. 3 . Figure 5 is a partial enlarged view of Figure 4. Figure 6 is a three-dimensional schematic view of the electrical module of the switch assembly of the present invention after being combined with the insulating bracket. Figure 7 is a three-dimensional schematic diagram of a cable welded to a circuit board of an electrical module. Figure 8 is a schematic three-dimensional view of the combination of the lower shell of the insulating shell and the insulating bracket. Figure 9 is a schematic three-dimensional view of the second sealing member filled in the lower housing through low-pressure injection molding. Figure 10 is a schematic three-dimensional view of the positioning groove of the lower case being coated with waterproof glue before being combined with the elastic member. FIG. 11 is a schematic three-dimensional view of the elastic member combined with the positioning groove of the lower case and the first sealing member formed by the waterproof glue after curing. Figure 12 is a schematic perspective view of the button body and the upper shell before they are combined with the lower shell. Figure 13 is a schematic three-dimensional view of the key body supported by the elastic body and the upper shell and the lower shell being fixed by ultrasonic welding.

11:Button opening

12: Upper shell

13: Lower shell

14:Cable opening

21:Circuit board

22: switch parts

30: Elastomer

40:Button body

41:First edge

51: Bearing part

52:Extension

60: Second seal

70:First seal

122:Peripheral wall

123:Second edge

133:Protruding lips

211: Solder pad

311: Positioning recess

511: Horizontal body

512:Tilted body

1351: Positioning slot

1352: Positioning rib

1361:First Stage Department

1362:Second Stage Department

C: Cable

C1: Conductor part

Claims (16)

A switch assembly including: An insulating housing including at least one key opening; An electrical module is provided in the insulating housing. The electrical module includes a circuit board and at least one switch component electrically connected to the circuit board. The at least one switch component corresponds to the at least one key opening; and At least one elastic body is disposed in the insulating shell and located above the at least one switch member. The at least one elastic body is exposed to the insulating shell through the at least one key opening. The at least one elastic body can move closer to the at least one switch. The direction of the switch component is elastically deformed and pushes the at least one switch component. The switch assembly according to claim 1, further comprising at least one key body, which is movably disposed in the at least one key opening and supported by the at least one elastic member. The switch assembly according to claim 2, wherein the outer peripheral wall of the at least one key body has a first flange, the first flange abuts the inner wall of the insulating shell, and is provided on the insulating shell. The inner wall of the body is stopped by a second flange located at the at least one key opening. The switch assembly according to claim 1 or 2, wherein the insulating housing includes an upper housing and a lower housing, the upper housing is fixedly connected to the lower housing, and the at least one key opening is provided in the upper housing. The electrical module and the at least one elastomer are positioned on the lower housing. The lower housing is provided with a cable opening for a cable to extend into the insulating housing. The switch assembly of claim 4, wherein the lower housing includes a positioning groove and a positioning rib disposed in the positioning groove, and the at least one elastic body has a positioning recess, and the positioning recess is engaged with the positioning recess. Positioning ribs position the at least one elastic body in the positioning groove. The switch assembly according to claim 5, wherein a first sealing member is provided between the outer peripheral surface of the at least one elastic body and the wall surface of the positioning groove. The switch assembly of claim 6, wherein the inner peripheral surface of the upper housing surrounds and covers the outer peripheral surface of the lower housing, and the outer peripheral surface of the lower housing has a drainage structure, and the drainage structure is adjacent to the Locate the recess. The switch assembly as claimed in claim 5, further comprising an insulating bracket disposed on the lower housing, the electrical module positioned on the insulating bracket, and the lower housing provided with on both sides of the cable opening. A carrier structure, the insulating bracket is arranged on the carrier structure. The switch assembly of claim 8, wherein the insulating bracket includes a bearing portion and an extension portion. The bearing portion is disposed on the carrier structure and spans above the cable opening. The extension portion extends from the bearing portion. The circuit board extends in a direction close to the cable opening, the circuit board is provided on the carrying part and the extending part, the at least one switch is located on the carrying part, a plurality of soldering pads of the circuit board are located on the extending part, and the cable conductors are soldered to these pads. The switch assembly as claimed in claim 9, wherein the circuit board is flexible, and the circuit board is folded and arranged on the upper and lower opposite surfaces of the carrying part and extends to the extension part. The switch assembly of claim 9, wherein the carrying portion and the extension portion are engaged and positioned with the inner wall of the insulating housing by an engaging structure composed of an engaging convex portion and an engaging recessed portion. The switch assembly of claim 9, wherein the carrier structure includes a first carrier part and a second carrier part, the first carrier part is higher than the second carrier part, and the carrier part includes A horizontal body and an inclined body, the horizontal body is provided on the first stage part, the inclined body is connected to the horizontal body and is provided on the second stage part, and the extension part is connected to the inclined body. The switch assembly according to claim 12, wherein the electrical module includes two switch parts, respectively corresponding to the horizontal body and the inclined body, the upper housing is provided with two key openings, and the switch The assembly includes two elastic bodies and two key bodies. The switch assembly of claim 6, further comprising a second sealing member that closes the cable opening and covers the conductor portion of the cable and the soldering pads of the circuit board, the The first sealing member, the at least one elastic member and the second sealing member enable the electrical module to form a sealed state. The switch assembly of claim 14, wherein the second sealing member is filled in the cable opening by low-pressure injection molding. The switch assembly of claim 1, wherein the at least one elastic body is a silicone cover.

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