CN215069731U - Waterproof button subassembly and electronic equipment - Google Patents

Abstract

The utility model provides a waterproof key assembly and an electronic device, wherein the waterproof key assembly comprises a shell, a key support and an elastic key; the shell is provided with a waterproof boss and a key through hole; the elastic key is provided with a pressing part and a waterproof groove, and the waterproof groove surrounds the pressing part; the button support is fixedly installed on the shell, so that the elastic button clamp is arranged between the button support and the shell, the pressing portion is inserted into the button through hole, the waterproof boss is inserted into the waterproof groove, and the waterproof groove is installed between the button support and the waterproof boss in an interference mode. The utility model provides a waterproof button subassembly and electronic equipment, when casing and liquid contact, liquid flows to waterproof recess along the elasticity button according to the gap between splenium and the button through-hole. Because the key support, the waterproof groove and the waterproof boss are in interference fit, the groove bottom of the waterproof groove is pressed tightly on the waterproof boss by being pushed by the key support, and therefore liquid cannot enter the shell.

Description

Waterproof button subassembly and electronic equipment

Technical Field

The utility model relates to an electronic equipment field especially relates to a waterproof button subassembly and electronic equipment.

Background

With the progress and development of science and technology, various electronic devices gradually enter various scenes of life. For example, to adapt to scenes such as walking, swimming, etc., the electronic device needs to prevent water or other liquids from entering the inside of the electronic device, so as to prevent the performance of the electronic device from being affected by the liquids and being reduced or even damaged. The waterproof design of the keys on the electronic equipment shell is one ring in the waterproof design of the whole electronic equipment. For effective waterproofing purposes, the gap between the side casing and the key must be sealed to isolate the liquid from the outside of the casing.

The current common key waterproof method is to install a seal ring in the direction perpendicular to the key movement direction. Although the sealing ring can effectively prevent liquid from entering the electronic equipment, the key is easy to wear along with the relative movement of the key and the sealing ring when being used for a long time, so that the waterproof function of the sealing ring is failed, and the waterproof performance of the whole electronic equipment is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a waterproof button subassembly and electronic equipment for solve the easy defect that the wearing and tearing became invalid of waterproof subassembly of button among the prior art.

The utility model provides a waterproof button subassembly, include: the device comprises a shell, a key support and an elastic key; the shell is provided with a waterproof boss and a key through hole; the elastic key is provided with a pressing part, the elastic key is provided with a waterproof groove, and the waterproof groove surrounds the pressing part; the key support is fixedly arranged on the shell, so that the elastic key clamp is arranged between the key support and the shell, the pressing part is inserted into the key through hole, the waterproof boss is inserted into the waterproof groove, and the waterproof groove is arranged between the key support and the waterproof boss in an interference fit mode.

According to the utility model provides a waterproof button subassembly, the terminal surface of waterproof boss is the ladder face, waterproof recess be the adaptation in the ladder groove of waterproof boss.

According to the utility model provides a waterproof button subassembly, the inboard of waterproof boss is less than the outside of waterproof boss, the outside slot wall of waterproof recess is higher than inboard cell wall.

According to the utility model provides a waterproof button subassembly, the button through-hole is the bell mouth, the main aspects of bell mouth is compared and is more close to in the tip button holder, press the splenium with the bell mouth adaptation.

According to the utility model provides a waterproof button subassembly, the casing still has the button and prevents slow-witted structure, the button prevent slow-witted structure with the cooperation of elasticity button is connected.

According to the waterproof button assembly provided by the utility model, the button fool-proofing structure is a bulge arranged on the base of the shell; the elastic key is provided with a matching hole, and the bulge is inserted into the matching hole.

According to the utility model provides a waterproof button subassembly, still include the circuit board, the circuit board is fixedly mounted in the button support; the button support is provided with a switch through hole, and a switch of the circuit board is abutted to the pressing part through the switch through hole.

According to the utility model provides a waterproof button subassembly, still include the locating part; the pressing part and the switch are abutted against each other, the area of the abutting surface of the pressing part and the switch is equal to or smaller than the area of the end face of the switch, and the limiting part is connected to the elastic key or the key support and used for limiting the moving range of the pressing part.

According to the waterproof key assembly provided by the utility model, the shell is also provided with a bracket clamping groove, and the key bracket is also provided with a clamping opening part matched with the bracket clamping groove; the shell is also provided with a convex column, the key support is also provided with a support foot, and the support foot is fixedly connected with the convex column; the bayonet part and the support foot are respectively connected to two ends of the key support.

The utility model also provides an electronic equipment, including above-mentioned arbitrary waterproof button subassembly.

The utility model provides a waterproof button subassembly and electronic equipment, waterproof boss insert and locate waterproof recess, and when casing and liquid contact, liquid can only flow to waterproof recess in the same direction as the gap between elastic button pressing part and button through-hole. Because the key support, the waterproof groove and the waterproof boss are in interference fit, the groove bottom of the waterproof groove is pressed tightly on the waterproof boss by being pushed by the key support, and no gap is reserved between the groove bottom of the waterproof groove and the waterproof boss, so that liquid cannot enter the shell from the waterproof groove.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an exploded view of a waterproof key assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a housing according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of an elastic key according to an embodiment of the present invention;

fig. 4 is a longitudinal sectional view of an elastic key according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an elastic key according to an embodiment of the present invention;

fig. 6 is a longitudinal sectional view of a waterproof key assembly according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a waterproof key assembly according to an embodiment of the present invention;

reference numerals:

1: a housing; 11: a waterproof boss; 12: a key through hole;

13: a button fool-proofing structure; 14: a bracket clamping groove; 15: a convex column;

2: an elastic key; 21: a pressing part; 211: a key core;

212: a limiting member; 213: a key wall; 22: a bottom ring portion;

221: a waterproof groove; 23: a mating hole;

3: a key holder; 31: a bayonet part; 32: a support leg;

33: a bracket screw hole; 34: a positioning column; 35: a switch through hole;

4: a circuit board; 41: a switch; 42: positioning the column hole;

43: and printing a screw hole.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The structure of the waterproof key assembly provided by the present invention is described below with reference to fig. 1 to 7.

As shown in fig. 1 and 7, an embodiment of the present invention provides a waterproof key assembly, which includes a housing 1, an elastic key 2, and a key support 3.

Wherein, the shell 1 is provided with a waterproof boss 11 and a key through hole 12. The waterproof boss 11 is an annular boss surrounding the key through hole 12. The key through hole 12 is located on the housing 1, and an arc-shaped boss formed around the key through hole 12 is a waterproof boss 11. In one embodiment, as shown in fig. 2, a boss is disposed on the inner side of the housing 1, and a through hole penetrating through the boss and the housing 1 is used as a key through hole 12 for receiving the elastic key 2. The part of the boss corresponding to the key through hole 12 is the waterproof boss 11, that is, the inner wall surface of the waterproof boss 11 is a part of the hole wall of the key through hole 12. In another embodiment, the waterproof boss 11 is another annular protrusion surrounding the boss. The inner side of the housing 1 refers to the side of the housing 1 close to the key holder 3, and the opposite, outer side of the housing 1 refers to the side of the housing 1 away from the key holder 3.

The shape and size of the key through-hole 12 depend on the elastic key 2. The size of the key through hole 12 is based on the fact that the elastic key 2 is attached to the hole wall in a non-pressed state and can move along the axial direction of the key through hole 12 when being pressed. The shape of the key through hole 12 is adapted to the elastic key 2. For example, the elastic key 2 is a circular waist shape, and correspondingly, the key through hole 12 is a circular waist hole. For another example, the elastic key 2 is circular or square, correspondingly, and the key through hole 12 is a round hole or a square hole, which is not limited by the present invention.

The elastic key 2 has a pressing portion 21, and the pressing portion 21 is inserted into the key through hole 12. The elastic key 2 is provided with a waterproof groove 221, and the waterproof groove 221 surrounds the pressing portion 21.

The elastic key 2 is an elastic member such as a silicone member or a rubber member. As shown in fig. 3 to 5, the elastic key 2 has a pressing portion 21 and a base ring portion 22. The pressing part 21 is inserted in the key through hole 12 to serve as a pressing body part, and moves along the axis of the key through hole 12 in a state that the elastic key 2 is pressed; the skirt portion 22 is a skirt disposed around the pressing portion 21 and is adapted to be placed on the inner end surface of the key through hole 12.

A waterproof groove 221 is provided on the outward side of the rim portion 22. In one embodiment, the key wall 213 is a square ring or a circular ring, and the outer surface of the key wall 213 forms an inner groove wall of the waterproof groove 221; in another embodiment, as shown in fig. 1, a waterproof groove 221 is provided on the base ring portion 22 with its inner groove wall spaced a distance from the outer surface of the key wall 213.

After the pressing portion 21 is inserted into the key through hole 12, a pressing end surface of the pressing portion 21 exceeds an outer end surface of the key through hole 12 or is flush with the outer end surface of the key through hole 12. Specifically, as shown in fig. 4, the pressing portion 21 includes a key wall 213 and a key core 211 disposed inside the key wall 213, the key core 211 is configured to abut against the switch 41 on the circuit board, the key wall 213 surrounds the key core 211, a gap is left between the key core 211 and the key wall 213, and the key wall 213 is attached to the hole wall of the key through hole 12 in the non-pressed state.

The key support 3 is fixedly arranged on the shell 1 so as to clamp the elastic key 2 between the key support 3 and the shell 1. The pressing portion 21 is inserted into the key through hole 12, the waterproof boss 11 is inserted into the waterproof groove 221, and the waterproof groove 221 is installed between the key support 3 and the waterproof boss 11 in an interference manner.

The direction of the shell 1 and the elastic keys 2 relative to the key support 3 is the front direction of the key support 3, and the opposite direction is the back direction of the key support 3.

As shown in fig. 6 and 7, the key holder 3 is fixedly mounted on the housing 1, and the front surface thereof is parallel to the end surface of the waterproof boss 11 with a certain gap. The waterproof boss 11 is inserted into the waterproof groove 221, and the end surface thereof abuts against the bottom surface of the waterproof groove 221. The inner surface and the outer surface of the waterproof boss 11 are respectively connected with the waterproof groove 221; the two groove walls are connected in an abutting mode. The side surface of the rim portion 22 away from the pressing portion 21 abuts against the key holder 3.

When the elastic key 2 is in a natural state, the thickness of the groove bottom of the waterproof groove 221 is larger than the installation gap formed between the key support 3 and the end surface of the waterproof boss 11, so that the elastic key 2 and the key support 3 are installed on the shell 1, the key support 3, the groove bottom of the waterproof groove 221 and the waterproof boss 11 are installed in an interference fit mode, the groove bottom of the waterproof groove 221 is squeezed to be tightly attached to the waterproof boss 11, no gap is reserved between the groove bottom of the waterproof groove 221 and the end surface of the waterproof boss 11, and external water flow is prevented from flowing into the key.

It can be understood that, when the elastic key 2 is in a natural state, the key wall 213 is attached to the hole wall of the key through hole 12 without a gap. In a state where the elastic push button 2 is pushed, the pressing portion 21 moves in the axial direction of the push button through hole 12, and the push button wall 213 deforms during the movement and recovers after the elastic push button 2 recovers to its natural state.

After the elastic key 2 and the key holder 3 are mounted on the housing 1, the outer surface of the waterproof boss 11 is fitted to the outer wall of the waterproof groove 221 without a gap, and the inner surface of the waterproof boss 11 is fitted to the inner wall of the waterproof groove 221 without a gap. The inner side refers to a side of the waterproof boss 11 and the waterproof groove 221 close to the key through hole 12, and the outer side refers to a side of the waterproof boss 11 and the waterproof groove 221 far away from the key through hole 12.

In one embodiment, the end surface of the waterproof boss 11 and the groove bottom of the waterproof groove 221 are both flat. In another embodiment, the end surface of the waterproof boss 11 is an outwardly protruding arc surface, and the bottom of the waterproof groove 221 is a corresponding inwardly recessed arc surface.

The embodiment of the utility model provides a waterproof button subassembly, waterproof boss 11 are inserted and are located waterproof recess 221, and when casing 1 contacted with liquid, liquid can only flow to waterproof recess 221 along the gap between button wall 213 and button through-hole 12. Because the key support 3, the waterproof groove 221 and the waterproof boss 11 are in interference fit, the groove bottom of the waterproof groove 221 is pushed by the key support 3 to press the waterproof boss 11 tightly without leaving a gap with the waterproof boss 11, so that liquid cannot enter the shell 1 from the waterproof groove 221.

On the basis of the above embodiment, the utility model also provides a waterproof button subassembly, its waterproof boss 11's terminal surface is the ladder face.

In one embodiment, as shown in fig. 6, the end face of the waterproof boss 11 is provided with a counter bore, and the counter bore is located inside the waterproof boss 11, so that the end face of the waterproof boss 11 is stepped. It is understood that, as shown in fig. 3 and 4, the waterproof groove 221 is a stepped groove adapted to the stepped surface of the waterproof boss 11, correspondingly. The inner groove wall of the waterproof groove 221 is spaced apart from the outer surface of the key wall 213 by a distance, or the inner groove wall of the waterproof groove 221 is a part of the key wall 213.

In another embodiment, the end surface of the waterproof boss 11 is provided with a counter bore, and the counter bore is located outside the waterproof boss 11, so that a step surface is formed outside the waterproof boss 11. Correspondingly, the waterproof groove 221 is a stepped groove adapted to the waterproof boss 11.

In another embodiment, the inner side and the outer side of the end surface of the waterproof boss 11 are respectively provided with a counter bore, so that the end surface of the waterproof boss 11 is in a convex shape, and correspondingly, the waterproof groove 221 is a groove body matched with the groove body.

The utility model provides a waterproof button subassembly, 11 terminal surfaces of waterproof boss set up to the ladder face, have prolonged the route of liquid along the circulation of installation gap, can effectively avoid it to flow into inside casing 1 when the liquid volume hour. Therefore, the end face provided with the waterproof boss 11 is a stepped surface, so that the waterproof performance of the waterproof key assembly is further enhanced.

On the basis of the above-mentioned embodiment, the embodiment of the utility model provides a still provide a waterproof button subassembly, the inboard of waterproof boss 11 is less than the outside, also is the interior low outer high ladder face, and the outside cell wall of waterproof recess 221 is higher than the inboard cell wall. When liquid flows into the waterproof groove 221 along the installation gap, since the outer groove wall of the waterproof groove 221 is high, the liquid is not easy to overflow into the inside of the housing 1.

As shown in fig. 3-5, the outer side wall of the waterproof groove 221 and the outer surface of the key wall 213 form two walls of the step groove matching with the step surface of the waterproof boss 11, and the outer side wall of the waterproof groove 221 is higher than the inner side wall.

On the basis of the above-mentioned embodiment, the embodiment of the utility model provides a still provide a waterproof button subassembly, button through-hole 12 is the bell mouth, and the main aspects of bell mouth are compared and are more close to key-holder 3 in the tip, press splenium 21 and bell mouth adaptation. For example, the key through hole 12 is a truncated cone-shaped through hole, and correspondingly, the pressing portion 21 is a truncated cone-shaped through hole; alternatively, the key through hole 12 is a frustum-shaped through hole, and correspondingly, the pressing portion 21 is a frustum-shaped through hole.

As shown in fig. 6, the key through hole 12 is a tapered hole with a large inside and a small outside, and the pressing portion 21 is a tapered protrusion adapted to the tapered hole. In this embodiment, the key through hole 12 is a tapered hole, which prolongs the length of the hole wall of the key through hole 12, thereby prolonging the length of the path for the liquid to flow into the waterproof groove 221 from the gap between the key through hole 12 and the key wall 213, and improving the waterproof performance.

On the basis of the above embodiment, the embodiment of the utility model provides a still provide a waterproof button subassembly, still have button on its casing 1 and prevent slow-witted structure 13, button prevents slow-witted structure 13 and is connected with the cooperation of elastic button 2.

In one embodiment, as shown in FIGS. 1 and 2, the key fool-proofing structure 13 is a cylindrical protrusion on the base of the housing 1. As shown in fig. 3-5, the lower end of the bottom ring portion 22 of the elastic button 2 is configured with a mounting leg, the mounting leg is provided with a matching hole 23, and the cylindrical protrusion is inserted into the matching hole 23.

In another embodiment, the key fool-proofing structure 13 may also be a protrusion or a pin disposed on the inner side surface of the casing 1 and in the same direction as the waterproof boss 11, the bottom ring portion 22 of the elastic key 2 extends out of a mounting bracket, the mounting bracket is provided with a fitting hole 23, and the protrusion or the pin is inserted into the fitting hole 23 perpendicular to the outer surface of the front surface of the bottom ring portion 22.

The embodiment of the utility model provides a waterproof button subassembly prevents slow-witted structure 13 discernment elasticity button 2 through the button and installs the upper and lower direction when casing 1, prevents that elasticity button 2 from adorning anti-conversely. The key fool-proof structure 13 can also be other structures capable of realizing the positioning of the elastic key 2 and the shell 1, and the utility model discloses do not limit to this.

On the basis of the above-mentioned embodiment, the embodiment of the utility model provides a still provide a waterproof button subassembly, still include circuit board 4, 4 fixed mounting of circuit board in key-press support 3. The key holder 3 is provided with a switch through hole 35, and the switch 41 of the circuit board 4 passes through the switch through hole 35 and abuts against the pressing portion 21.

Wherein, circuit board 4 and key-press support 3 can be through multiple mode fixed connection, for example through screw connection, set up mounting groove joint etc. the utility model discloses do not injecing to this. In a specific embodiment, as shown in fig. 6 and 7, the key holder 3 is substantially square, and has two holder screw holes 33 and two positioning posts 34, wherein the two holder screw holes 33 are arranged along a diagonal of the key holder 3, and the two positioning posts 34 are arranged along the other diagonal of the key holder 3. The circuit board 4 is provided with two positioning post holes 42 and printed board screw holes 43. The positioning post 34 is inserted into the positioning post hole 42, and the support screw hole 33 and the printed board screw hole 43 are fixedly connected by screws. Of course, the number and layout of the screw holes 33 and the positioning posts 34 can be various, and the present invention is not limited thereto.

As shown in fig. 6, the switch 41 passes through the switch through hole 35 in the key holder 3 and abuts against the key core 211 of the pressing portion 21. When the elastic button 2 is pressed, the button core 211 pushes the switch 41, thereby realizing a button operation.

On the basis of the above-mentioned embodiment, the embodiment of the utility model provides a still provide a waterproof button subassembly, its key core 211 surface area is greater than switch 41 surface area, and when the button was pressed, the terminal surface of key core 211 contradicts with key support 3 in order to restrict key core 211 home range, avoids pressing the too big switch 41 that leads to of pressure to damage.

In another embodiment, the waterproof key assembly further includes a retaining member 212. The contact surface area of the pressing portion 21 and the switch 41 is equal to or smaller than the area of the switch 41, and the limiting member 212 is connected to the elastic key 2 or the key holder 3 for limiting the moving range of the key core 211. For example, as shown in fig. 1, 3, 4, or 6, the position-limiting element 212 is an annular thin-walled boss surrounding the key core 211, and may be in the shape of a circular ring or a square ring, and its end surface is flush with the end surface of the key core 211. With the movement of the key core 211, the limiting member 212 pushes against the surface of the key holder 3, thereby limiting the movable range of the key core 211. For another example, the limiting member 212 may also be an annular thin-walled boss surrounding the switch through hole 35 on the key holder 3, and may be a circular ring or a square ring. Along with the movement of the key core 211, the annular thin-wall boss on the key support 3 pushes against the pressing part 21, thereby limiting the moving range of the key core 211.

The waterproof key assembly provided by the above embodiment limits the moving range of the key core 211 by providing the limiting mechanism, so as to prevent the key core 211 from passing through the switch through hole 35, which causes the switch 41 to be damaged by being pressed excessively.

On the basis of the above embodiment, the embodiment of the utility model provides a still provide a waterproof button subassembly, as shown in fig. 1, 2 or 7, casing 1 still is equipped with support draw-in groove 14, and key support 3 still has the bayonet part 31 with support draw-in groove 14 complex. The casing 1 further has a convex pillar 15, the key holder 3 further has a holder leg 32, and the holder leg 32 is fixedly connected to the convex pillar 15. The bayonet portion 31 and the holder leg 32 are connected to both ends of the key holder 3, respectively. Specifically, the shell 1 is connected with two vertical plates, the two vertical plates and the waterproof boss 11 are arranged on the same side of the shell 1, and a support clamping groove 14 is arranged at the top of each vertical plate. The vertical plate is integrally formed with the housing 1. The bottom of the shell 1 is folded to form a folded plate, the convex column 15 is arranged on the folded plate, and the extending direction of the convex column 15 is consistent with the length direction of the vertical plate. Two convex columns 15 are arranged, and the two convex columns 15 are arranged on the folded plate at intervals and are positioned at two opposite sides of the waterproof boss 11.

Wherein, bayonet part 31 is located the upper end of key-press support 3, and the lower extreme of key-press support 3 is located to support foot 32, is equipped with the screw hole on the support foot 32. The convex column 15 is also provided with a screw hole. During installation, the bayonet part 31 is firstly clamped in the bracket clamping groove 14, preliminarily positions the key bracket 3 and limits the displacement of the upper end, and then fixes the bracket foot 32 on the convex column 15 through a screw. The upper end and the lower end of the key support 3 are fixed, so that the key support 3 and the shell 1 are spaced at a fixed interval.

The embodiment of the utility model provides a still provide an electronic equipment, including above-mentioned arbitrary one in the electronic equipment waterproof button subassembly. The electronic equipment can be mobile equipment such as a mobile phone and a tablet personal computer, or imaging devices such as an acoustic imager.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (10)

1. A waterproof key assembly, comprising: the device comprises a shell, a key support and an elastic key;

the shell is provided with a waterproof boss and a key through hole;

the elastic key is provided with a pressing part, the elastic key is provided with a waterproof groove, and the waterproof groove surrounds the pressing part;

the key support is fixedly arranged on the shell, so that the elastic key clamp is arranged between the key support and the shell, the pressing part is inserted into the key through hole, the waterproof boss is inserted into the waterproof groove, and the waterproof groove is arranged between the key support and the waterproof boss in an interference fit mode.

2. The waterproof key assembly of claim 1, wherein the end surface of the waterproof boss is a stepped surface, and the waterproof groove is a stepped groove adapted to the waterproof boss.

3. The waterproof key assembly of claim 2, wherein an inner side of the waterproof boss is lower than an outer side of the waterproof boss, and an outer side groove wall of the waterproof groove is higher than an inner side groove wall.

4. The waterproof key assembly according to any one of claims 1 to 3, wherein the key through hole is a tapered hole, a large end of the tapered hole is closer to the key holder than a small end, and the pressing portion is fitted into the tapered hole.

5. The waterproof key assembly of claim 1, wherein the housing further comprises a key retention structure, the key retention structure being cooperatively coupled to the resilient key.

6. The waterproof key assembly of claim 5, wherein the key fool-proofing structure is a protrusion provided on the base of the housing;

the elastic key is provided with a matching hole, and the bulge is inserted into the matching hole.

7. The waterproof key assembly of claim 1, further comprising a circuit board fixedly mounted to the key support;

the button support is provided with a switch through hole, and a switch of the circuit board is abutted to the pressing part through the switch through hole.

8. The waterproof key assembly of claim 7, further comprising a retaining member;

the pressing part and the switch are abutted against each other, the area of the abutting surface of the pressing part and the switch is equal to or smaller than the area of the end face of the switch, and the limiting part is connected to the elastic key or the key support and used for limiting the moving range of the pressing part.

9. The waterproof key assembly of claim 1, wherein the housing further has a bracket slot, and the key bracket further has a bayonet portion engaged with the bracket slot;

the shell is also provided with a convex column, the key support is also provided with a support foot, and the support foot is fixedly connected with the convex column;

the bayonet part and the support foot are respectively connected to two ends of the key support.

10. An electronic device comprising the waterproof key assembly of any one of claims 1-9.

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