CN218730540U

CN218730540U - Waterproof button

Info

Publication number: CN218730540U
Application number: CN202222984239.XU
Authority: CN
Inventors: 谢嗣海; 盖伟东; 毛华生
Original assignee: Dongguan Liesheng Electronic Co Ltd
Current assignee: Dongguan Liesheng Electronic Co Ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-03-24
Anticipated expiration: 2032-11-08

Abstract

The utility model discloses a waterproof button, a mounting hole is arranged on the shell of the button, a keycap is arranged in the mounting hole in a clearance fit manner, the keycap is connected with an elastic support piece, the lower end surface of the keycap is provided with a center post extending towards the inner direction of the shell, and the elastic support piece is provided with a pressing part corresponding to the center post; the middle column is pressed against the upper surface of the pressing part of the elastic supporting part, a hard touch panel is fixed on the lower surface of the pressing part, and the press switch is positioned below the hard touch panel; when external force acts on the keycap, the keycap presses down along the mounting hole to move, the middle column presses down to drive the elastic supporting piece to deform, the hard touch panel fixed on the pressing part moves down to act on the pressing switch, and the pressing switch is triggered. The utility model discloses both can guarantee the button and feel, satisfy water-proof effects again.

Description

Waterproof button

The technical field is as follows:

the utility model relates to a button device technical field of electronic product refers in particular to a waterproof button that can be used to in the earphone.

Background art:

the conventional push button is generally composed of a key cap, an elastic support and an electronic push switch, wherein the elastic support is generally a spring or a spring-like component, and is used for elastically supporting the key cap and pushing the key cap to reset after the key cap is pressed. Because the key can produce displacement from top to bottom in the process of pressing, so must have certain clearance in each part cooperation in the key, and to the electronic product that has waterproof requirement, the waterproof processing of key position is a key. For example, in a bone conduction earphone product, in order to improve the waterproof effect of the earphone and enable the product to satisfy the IPX 7-level waterproof effect, the traditional press type key cannot be realized. In view of the above, in the current bone conduction earphone, an elastic supporting member is generally made of a silicone material, and the elastic supporting member is fixedly connected with a housing through a bonding or sleeve-molding process to form a seal. Although the silicone material has good elasticity, the material is relatively flexible, and a user cannot sense that the push switch is triggered in the pressing process, namely the touch feeling of the key is poor. Particularly, after the user pressed the key cap, pressure passed through the key cap and transmitted to elastic support piece, and on rethread elastic support piece acted on the push switch, because its texture of the elastic support piece who adopts silica gel material preparation was pliable and tough, at the transmission pressure in-process, self can take place deformation, just so lead to being not the rigid contact of pressure that is used in on the push switch, the push switch that probably appears is difficult to trigger to also can be difficult to obtain the button sense of touch to the user.

Aiming at the problems, the inventor provides a key which can ensure the hand feeling of the key and meet the waterproof effect through continuous improvement and test.

The utility model has the following contents:

the utility model aims to solve the technical problem that the prior art is not enough to overcome, and a waterproof button is provided.

In order to solve the technical problem, the utility model discloses a following technical scheme: a waterproof key includes: the key cap is arranged in the mounting hole in a clearance fit manner, the key cap and the elastic supporting piece are connected with each other, the lower end face of the key cap is provided with a central column extending towards the inner direction of the shell, and the elastic supporting piece is provided with a pressing part corresponding to the central column; the middle column is pressed against the upper surface of the pressing part of the elastic supporting part, a hard touch panel is fixed on the lower surface of the pressing part, and the press switch is positioned below the hard touch panel; when external force acts on the key cap, the key cap pushes down along the mounting hole and moves, the middle column pushes down to drive the elastic supporting piece to deform, the hard touch plate fixed on the pressing part moves downwards to act on the pressing switch, and the pressing switch is triggered.

Furthermore, in the above technical solution, a plurality of connecting pins are formed on the lower end surface of the key cap, connecting holes corresponding to the connecting pins are formed on the elastic supporting member, the connecting pins are inserted into the connecting holes, and the connecting pins are hermetically connected with the connecting holes.

Furthermore, in the above technical solution, the key cap has an inner collar formed around the center pillar at a lower end thereof, and the inner collar abuts against an upper end surface of the elastic support.

Further, in the above technical scheme, the connecting pins of the keycap are uniformly distributed on the periphery of the center pillar.

Further, in the above technical solution, a step portion is formed at a lower end of an inner wall of the mounting hole; a stopping part corresponding to the step part is formed on the outer wall of the keycap; and an outer groove corresponding to the step part is formed on the elastic supporting piece.

Furthermore, in the above technical solution, the inner side of the casing is formed to surround the ring body of the elastic supporting member, and the outer wall of the elastic supporting member is attached to the inner wall of the ring body.

Furthermore, in the above technical solution, a plurality of positioning protrusions are formed on the inner wall of the ring body, and positioning grooves corresponding to the positioning protrusions are formed on the outer wall of the elastic supporting member.

Furthermore, in the above technical solution, the hard touch plate is made of a hard plastic material and is fixed on the lower surface of the pressing portion by adhesion or injection molding.

Furthermore, in the above technical solution, the elastic supporting member is made of a silica gel material and is injection molded inside the mounting hole by a sleeve-beer process, so that the elastic supporting member and the housing are fixed as a whole.

Furthermore, in the above technical solution, the casing is a shell of the bone conduction earphone, the vibrator of the bone conduction earphone is installed in a cavity formed in the casing, the push switch is electrically connected to the circuit board, and the circuit board is fixed on the casing.

After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect:

1. the utility model discloses the key cap adopts independent plastic material preparation, and elastic support piece adopts silica gel material then in the casing mounting hole through cover beer technology injection moulding, just so can guarantee the inside confined space that forms of casing to effectively reach waterproof, dustproof effect more than IPX7 level.

2. The utility model discloses an elastic support piece is provided with the stereoplasm touch panel through bonding or injection moulding mode with the position of push switch contact, exerts pressure on push switch through the stereoplasm touch panel, just so can realize that the user when pressing the button, and for rigid contact between the push switch, both can ensure that push switch is triggered by the accuracy, still guarantee the button simultaneously and feel.

Description of the drawings:

fig. 1 is a perspective view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view of a portion indicated at A in FIG. 2;

fig. 4 is an exploded perspective view of the present invention;

FIG. 5 is a view showing the internal structure of the middle case of the present invention;

FIG. 6 is a perspective view of the lower end surface of the key cap of the present invention;

fig. 7 is a perspective view of the end surface view of the elastic supporting member of the present invention;

fig. 8 is a perspective view of the bone conduction earphone of the present invention.

The specific implementation mode is as follows:

the present invention will be further described with reference to the following specific embodiments and accompanying drawings.

See fig. 1 to 4, the utility model relates to a waterproof button, include: a housing 1, a key cap 2, an elastic support 3, and a push switch 5 fixed within the housing 1.

Referring to fig. 5, the housing 1 has a cavity 10 therein, and a circular mounting hole 11 is formed in the surface of the housing 1, and the mounting hole 11 is used for mounting the keycap 2. A step part 111 is formed at the lower end of the inner wall of the mounting hole 11, and the step part 111 is used as a stop bulge for the key cap 2 to prevent the key cap 2 from being pressed down excessively and play a limiting effect on the key cap 2. A ring body 12 is formed on the inner wall of the housing 1 along the periphery of the mounting hole 11, and a space inside the ring body 12 constitutes an area where the elastic support 3 is disposed. Four positioning protrusions 121 are uniformly distributed on the inner wall of the ring body 12.

Referring to fig. 6, the key cap 2 is a separately manufactured part, and is formed by injection molding of a plastic material. The key cap 2 is located in the mounting hole 11 and is in clearance fit with the mounting hole 11 to ensure smooth pressing and resetting of the key. The upper end surface of the key top 2 serves as a force application surface for a user, and the lower end surface of the key top 2 has a center pillar 21 extending in the direction of the inside of the case 1.

The lower end face of the keycap 2 takes the central column 21 as the center and is also provided with three connecting pins 22 and an inner convex ring 23 which are evenly distributed. Said connecting pin 22 is intended to be connected to the elastic support 3. The inner collar 23 surrounds the outer periphery of the center post 21 and abuts against the upper end surface of the elastic support 3. The inner collar 23 can increase the force application area, and if only the center pillar 21 is used as the force application point during pressing the key cap 2, the pressure is relatively concentrated, and the pressure acting on the elastic support 3 is likely to form stress concentration. After a long period of use, the elastic support 3 may be torn or broken in the area of the center pillar 21. The inner collar 23 disperses the pressure acting on the elastic support 3, preventing the elastic deformation of the elastic support 3 from being concentrated in the area of the center pillar 21.

A stopper portion 24 corresponding to the step portion 111 is formed on the outer wall of the key top 2. As shown in fig. 3, the stopper portion 24 interferes with the step portion 111 in the mounting hole 11, and when the key top 2 is pressed down excessively, the stopper portion 24 is blocked by the step portion 111.

The elastic supporting piece 3 is made of silica gel materials and is formed on the inner side of the mounting hole 11 in an injection molding mode through a sleeve beer process, and the elastic supporting piece 3 and the shell 1 are fixed into a whole. The utility model discloses well elastic support piece 3 preferred 40A high-elastic silica gel or 40A high-elastic and 40A ordinary silica gel combined material. The 40A high-elastic silica gel has high elasticity and good structural strength, can still provide good pressing hand feeling elasticity even for some keys with small sizes and limited pressing spaces, and simultaneously ensures good structural strength.

As shown in fig. 7, the central area of the elastic support 3 is formed with a pressing portion 31 corresponding to the center pillar 21. The upper end surface of the pressing portion 31 is a groove for engaging with the central pillar 21 of the key cap 2, and the central pillar 21 is inserted into the groove of the pressing portion 31. The lower end surface of the pressing portion 31 is a plane, and a hard touch plate 4 is fixed on the lower end surface of the pressing portion 31.

A connecting hole 32 corresponding to the connecting pin 22 is formed on the elastic supporting member 3 at the periphery of the pressing portion 31, the connecting pin 22 is inserted into the connecting hole 32, and the connecting pin 22 is hermetically connected with the connecting hole 32. Specifically, after the connection between the connection pin 22 and the connection hole 32, a hot melt process or a glue sealing process is performed. The key cap 2 is coupled to the elastic support 3 by the coupling between the coupling pin 22 and the coupling hole 32, and the elastic support 3 is pushed to be deformed downward when the key cap 2 is pressed. When the pressing force disappears, the keycap 2 resets along with the elastic support 3.

In order to further increase the elasticity and the restoring speed of the elastic supporting member 3, the elastic supporting member 3 may be provided with multiple bending undulations, for example, in the present embodiment, an inner groove 35 is further provided at the periphery of the pressing portion 31.

An outer groove 33 corresponding to the step portion 111 is formed on the elastic supporting member 3, and an outer wall 34 is formed on the periphery of the outer groove 33. After the elastic supporting member 3 is molded in the case 1 through a beer-in-box process, the outer grooves 33 are adhered to the surface of the stepped portion 111. The outer wall 34 of the elastic supporting member 3 is attached to the inner wall of the ring 12 of the housing 1, and the multiple turning angles are utilized to improve the attaching precision between the elastic supporting member 3 and the inner wall of the housing 1, so that the elastic supporting member 3 and the housing 1 form a whole.

In order to further enhance the precision of the combination between the elastic supporting member 3 and the housing 1 and prevent the elastic supporting member from falling off, as mentioned above, the positioning protrusion 121 is formed on the inner wall of the ring body 12, and the positioning groove 341 corresponding to the positioning protrusion 121 is formed on the outer wall 34 of the elastic supporting member 3.

The hard touch plate 4 is made of hard plastic materials, and is fixed on the lower surface of the pressing part 31 in an injection molding or bonding mode, and the press switch 5 is located below the hard touch plate 4.

The utility model discloses can be used to among the bone conduction earphone, combine fig. 8 to show, this is the stereogram of 7 machine core portions of bone conduction earphone, and wherein casing 1 is as bone conduction earphone 7's shell, and bone conduction earphone 7's oscillator is installed in the cavity 10 that forms in casing 1. As a bone conduction earphone, the push switch 5 is electrically connected to a circuit board 6, and the circuit board 6 is fixed to the housing 1. The control circuit on the circuit board 6 can control the bone conduction headset and the push switch 5 is used to trigger the control circuit.

When the utility model is used, the key cap 2 and the elastic support piece 3 are connected with each other, the lower end surface of the key cap 2 is provided with a center post 21 extending towards the inner direction of the shell 1, and the elastic support piece 3 is provided with a pressing part 31 corresponding to the center post 21; the center post 21 is pressed against the upper surface of the pressing portion 31 of the elastic supporting member 3, a hard touch panel 4 is fixed on the lower surface of the pressing portion 31, and the push switch 5 is located below the hard touch panel 4. When an external force acts on the key cap 2, and the key cap 2 moves downward along the mounting hole 11, the middle pillar 21 presses downward to deform the elastic support 3, and the hard touch pad 4 fixed on the pressing portion 31 moves downward to act on the push switch 5, so as to trigger the push switch 5.

Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.

Claims

1. A waterproof key, comprising: casing, key cap, elastic support piece and fix the press switch in the casing, the casing on seted up a mounting hole, key cap clearance fit installs in the mounting hole, its characterized in that:

the keycap is connected with the elastic supporting piece, the lower end face of the keycap is provided with a center pillar extending towards the inner direction of the shell, and the elastic supporting piece is provided with a pressing part corresponding to the center pillar; the middle column is pressed against the upper surface of the pressing part of the elastic supporting part, a hard touch panel is fixed on the lower surface of the pressing part, and the press switch is positioned below the hard touch panel;

when external force acts on the key cap, the key cap pushes down along the mounting hole and moves, the middle column pushes down to drive the elastic supporting piece to deform, the hard touch plate fixed on the pressing part moves downwards to act on the pressing switch, and the pressing switch is triggered.

2. The waterproof key of claim 1, wherein: the key cap is characterized in that a plurality of connecting pins are formed on the lower end face of the key cap, connecting holes corresponding to the connecting pins are formed in the elastic supporting piece, the connecting pins are inserted into the connecting holes, and the connecting pins are connected with the connecting holes in a sealing mode.

3. The waterproof key of claim 2, wherein: an inner convex ring surrounding the center pillar is formed at the lower end of the keycap and abuts against the upper end face of the elastic support piece.

4. The waterproof key of claim 2, wherein: the connecting pin evenly distributed of key cap in the periphery of center pillar.

5. The waterproof key of claim 1, wherein: a step part is formed at the lower end of the inner wall of the mounting hole; a stopping part corresponding to the step part is formed on the outer wall of the keycap; and an outer groove corresponding to the step part is formed on the elastic supporting part.

6. The waterproof key of claim 1, wherein: the inner side of the shell is formed into a ring body which surrounds the elastic supporting piece, and the outer wall of the elastic supporting piece is attached to the inner wall of the ring body.

7. The waterproof key of claim 6, wherein: a plurality of positioning bulges are formed on the inner wall of the ring body, and positioning grooves corresponding to the positioning bulges are formed on the outer wall of the elastic supporting piece.

8. The waterproof key of claim 1, wherein: the hard touch plate is made of hard plastic materials and is fixed on the lower surface of the pressing part in an adhesion or injection molding mode.

9. The waterproof button according to any one of claims 1 to 8, wherein: the elastic supporting piece is made of silica gel materials and is formed on the inner side of the mounting hole in an injection molding mode through a sleeve beer process, and the elastic supporting piece and the shell are integrated.

10. The waterproof key of claim 9, wherein: the casing be the shell of bone conduction earphone, in the cavity that the oscillator of bone conduction earphone was formed installed in the casing, press the switch electric connection on the circuit board, this circuit board is fixed on the casing.