CN215834451U

CN215834451U - Normally closed optical axis key switch

Info

Publication number: CN215834451U
Application number: CN202122438231.9U
Authority: CN
Inventors: 汪大明
Original assignee: Huizhou Gateron Electronic Technology Co ltd
Current assignee: Huizhou Gateron Electronic Technology Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-02-15
Anticipated expiration: 2031-10-09

Abstract

The utility model discloses a normally closed optical axis key switch. The normally closed optical axis key switch comprises a rubber shell, a base and a key shaft core, wherein the rubber shell is buckled on the base, and the key shaft core is arranged on the rubber shell in a telescopic manner; the key shaft core is provided with a guide post protruding towards one side of the base, and the base is provided with a guide groove corresponding to the guide post; a first light hole is formed in the bottom of the guide groove; and a second light hole is formed in the guide post, and when the key shaft core is pressed down in place, the second light hole corresponds to the first light hole. The normally closed optical axis key switch is kept in a normally closed state in a normal state, and when the key shaft core is pressed down, the electric signal is disconnected, so that the normally closed state of the key switch is realized, the pressing is stable, and the hand feeling is smooth.

Description

Normally closed optical axis key switch

Technical Field

The utility model relates to the technical field of key switches, in particular to a normally closed optical axis key switch.

Background

The key switch has wide application in keyboard keys, remote controllers and other electronic product control devices, and corresponding circuits on a circuit board can be triggered by pressing the key switch corresponding to the instruction, so that corresponding instruction operation is performed. The optical axis key switch is obtained by adding a brand new optical induction recognition technology on the basis of a traditional mechanical key shaft to improve the optical axis key switch, has an optical induction effect, and has the advantages of high click response speed, long service life, no contact wear and the like.

However, the conventional optical axis push button switch is usually of a normally open type structure, i.e., the optical sensing can be performed to turn off the electrical signal under a normal state, and the optical sensing can be blocked to turn on the electrical signal under a pressing operation state. The normally-open type optical axis key switch has specific application occasions and corresponding advantages, however, circuits which need to be normally closed cannot be applied, the corresponding normally-closed type optical axis key switch in the market is still deficient, and a plurality of normally-closed circuits cannot be well controlled.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems that a normally-closed optical axis key switch is lacked in the prior art and the use hand feeling and the use smoothness of the key switch are ensured, the utility model provides the normally-closed optical axis key switch.

The purpose of the utility model is realized by the following technical scheme.

A normally closed optical axis key switch comprises a rubber shell, a base and a key shaft core, wherein the rubber shell is buckled on the base, and the key shaft core is arranged on the rubber shell in a telescopic manner; the key shaft core is provided with a guide post protruding towards one side of the base, and the base is provided with a guide groove corresponding to the guide post; when the key shaft core is pressed down, the guide post can extend into the guide groove; the bottom of the guide groove protrudes out of the bottom of the base, and a first light-transmitting hole is formed in the bottom of the guide groove; and a second light hole is formed in the guide post, and when the key shaft core is pressed down in place, the second light hole corresponds to the first light hole.

In a preferred embodiment, the base is provided with a positioning column protruding towards one side of the rubber casing, and the guide groove is formed in the positioning column.

In a preferred embodiment, the guide groove has a guide rail on an inner wall thereof.

In a more preferred embodiment, the number of the guide rails is two or more, and the two or more guide rails are uniformly distributed.

In a preferred embodiment, the guide post is hollow inside and open towards the end of the base; the second light hole is connected with the hollow interior of the guide post.

In a preferred embodiment, the first light-transmitting hole is formed along an axial direction perpendicular to the guide groove, and the second light-transmitting hole is formed along an axial direction perpendicular to the guide post.

In a more preferred embodiment, the guide post is provided with a position-avoiding groove along the axial direction of the key shaft core, corresponding to the outer wall of the cylinder body provided with the second light-transmitting hole.

In a preferred embodiment, the key shaft core is provided with a guide ridge, the base is provided with a guide groove corresponding to the guide ridge, and the guide ridge can slide along the guide groove.

In a preferred embodiment, a sounding elastic sheet is arranged in a cavity formed by mutually buckling the rubber shell and the base; when the key shaft core is pressed, the sounding elastic sheet can strike the key shaft core or the rubber shell and give out prompt sound.

In a preferred embodiment, in the normally closed optical axis key switch, a return spring is arranged between the base and the key shaft core; one end of the reset spring is in action connection with the base, and the other end of the reset spring is in action connection with the key shaft core.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

in the normally closed optical axis key switch, the bottom parts of the key shaft core and the guide groove are both provided with the light transmission holes, and the light transmission holes on the base are shielded by the key shaft core in a normal state, so that light cannot pass through the light transmission holes, and an electric signal is switched on and kept in a normally closed state; when the key shaft core is pressed down, the light holes in the key shaft core correspond to the light holes in the guide grooves, light can pass through the light holes, and the electric signal is disconnected. Therefore, the normally-closed key switch is realized, and the circuit with the normally-closed requirement can be well controlled.

And the guide post of key shaft core is hollow structure, makes the designable bigger of size of guide post, and the signal of telecommunication switches more reliably to have better suitability with the guide way, make between guide post and the guide way press the direction more accurate, press during the use and feel more smooth and easy. And the inner wall of the guide groove is provided with the guide rail, so that the contact area between the guide post and the guide groove can be reduced while the guide post is guided to move, the directional movement of the guide post is smoother and more stable, and the smoothness of pressing hand feeling is further improved.

In addition, the guide post of key shaft core is hollow structure and communicates with the light trap on the key shaft core, still is provided with on the guide post and keeps away a recess, can in time discharge the compressed air who gathers when the guide post pushes down the motion along the orientation of guide way, avoids the air to gather the compression and causes and press the jam, further guarantees to press and feels smooth and easy.

Drawings

Fig. 1 is a schematic view of the overall structure of a normally closed optical axis key switch according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a normally closed optical axis key switch according to an embodiment of the present invention;

FIG. 3 is an exploded view of a normally closed optical axis key switch according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a base;

FIG. 5 is a schematic structural view of a key shaft core;

the attached drawings are marked as follows: 1-rubber shell, 2-base, 201-guide groove, 202-positioning column, 203-guide groove, 2031-first light hole, 2032-guide rail, 3-key shaft core, 301-guide ridge, 302-guide column, 3021-second light hole, 3022-avoiding groove, 4-reset spring, and 5-sounding elastic sheet.

Detailed Description

The technical solutions of the present invention are further described in detail below with reference to specific examples and drawings, but the scope and implementation of the present invention are not limited thereto.

In the description of the specific embodiments, it should be noted that the terms "upper", "lower", "top", "bottom", and the like refer to orientations or positional relationships based on those shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and the terms "first", "second", and the like are used for convenience of distinction and are used only for convenience of description and simplification of the description, but do not indicate or imply that the structures or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore are not to be construed as limiting the present invention, nor are they to indicate or imply relative importance.

Unless expressly stated or limited otherwise, the terms "mounted," "disposed," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The normally closed optical axis key switch of the present invention, please refer to fig. 1-3, includes a rubber case 1, a base 2 and a key shaft core 3.

Wherein, glue 1 lock of shell and be in on the base 2, glue the buckle that has the adaptation that corresponds each other on shell 1 and the base 2, glue shell 1 and base 2 accessible buckle and carry out mutual joint lock. The key shaft core 3 is arranged on the rubber shell 1 and can directionally move in a telescopic way along a direction close to or far away from the base 2; specifically, as shown in fig. 3 to 5, the key shaft core 3 has a guide ridge 301, the base 2 has a guide groove 201 corresponding to the guide ridge 301, the guide ridge 301 can slide along the guide groove 201, and the key shaft core 3 can directionally and stably directionally move in a direction close to or far from the base 2 by the cooperation of the guide ridge 301 and the guide groove 201.

When the key switch is operated, the key shaft core 3 is pressed, so that the key shaft core 3 moves downwards, the key switch can carry out electric signal switching, a circuit outputs a corresponding control instruction, and the operation of the key switch is completed.

Referring to fig. 2 to 5, the key shaft core 3 has a guide post 302 protruding toward one side of the base 2, the key shaft core 3 has a pressing handle portion, and only the pressing handle portion is exposed out of the integral cavity formed by the buckling of the rubber case 1 and the base 2, and the guide post 302 portion including the key shaft core 3 is located in the integral cavity formed by the buckling of the rubber case 1 and the base 2 and is shielded. The base 2 is provided with a guide groove 203 corresponding to the guide post 302, specifically, the base 2 is provided with a positioning post 202 protruding towards one side of the rubber casing 1, and the guide groove 203 is arranged in the middle of the positioning post 202. When the key shaft core 3 is pressed down, the guide column 302 can be inserted into the guide groove 203 in an oriented manner, and can be removed from the guide groove 203 in an oriented manner.

Further, the bottom of the guide groove 203 extends to protrude from the bottom of the base 2, and a first light-transmitting hole 2031 is formed in the bottom of the guide groove 203, optionally, the first light-transmitting hole 2031 is a notch formed in the extending bottom of the guide groove 203 protruding from the bottom of the base 2; the guide post 302 is provided with a second light-transmitting hole 3021, specifically, the first light-transmitting hole 2031 is formed along an axial direction perpendicular to the guide groove 203, and the second light-transmitting hole 3021 is formed along an axial direction perpendicular to the guide post 302. And when the key shaft core 3 is pressed down to a position, the second light-transmitting hole 3021 corresponds to the first light-transmitting hole 2031.

Thus, the second light hole 3021 and the first light hole 2031 are respectively formed at the bottom of the key shaft core 3 and the guide groove 203, and the electric signal sensing light corresponds to the first light hole 2031. In a normal state, the second light-transmitting hole 3021 on the key shaft core 3 is located in the cavity where the rubber case 1 and the base 2 are fastened together along with the guide post 302, the first light-transmitting hole 2031 on the guide groove 203 is shielded by the key shaft core 3, so that light cannot penetrate through the first light-transmitting hole 2031, and an electric signal is switched on and kept in a normally closed state; when the key shaft core 3 is pressed down, the second light-transmitting hole 3021 of the key shaft core 3 corresponds to the first light-transmitting hole 2031 of the guide groove 203 and allows light to pass through, so that the electrical signal is turned off. Therefore, the normally-closed key switch is realized, and the circuit with the normally-closed requirement can be well controlled.

In a preferred embodiment, and as further shown in fig. 4, a guide rail 2032 is provided on an inner wall of the guide groove 203. Optionally, but not limited to, the number of the guide rails 2032 is two or more, and the two or more guide rails 2032 are uniformly distributed; in the particular embodiment shown in fig. 4, the rail 2032 comprises 4 evenly spaced rails. When the guide post 302 moves in the guide groove 203 in a telescopic manner, the outer surface of the guide post 302 directly contacts with the guide rail 2032 and can slide guided by the guide rail 2032, so that the contact area between the guide post 302 and the guide groove 203 can be effectively reduced, the guide movement of the guide post 302 in the guide groove 203 is smooth and stable, and the pressing hand feeling is smooth.

In another preferred embodiment, please refer to fig. 5 again, the guiding column 302 is hollow inside and open towards the end of the base 2; the second light-transmitting hole 3021 is connected to the hollow interior of the guide post 302. The guide post 302 is designed to be a hollow post column which is hollow inside and open at the end part, so that the size of the guide post 302 can be designed to be larger, the guide matching adaptability of the guide post 302 and the guide groove 203 is better in the process of pressing the key shaft core 3, the pressing guide between the guide post 302 and the guide groove 203 is more accurate, the air in the guide groove 203 can be discharged through the second light-transmitting hole 3021 while the key shaft core 3 is pressed, the pressing hand feeling is smooth, and no jamming exists; moreover, the aperture of the corresponding second light hole 3021 can be larger, so that the light transmittance of the second light hole 3021 is better and more reliable, and further, the electrical signal generated when the key shaft core 3 is pressed is more reliably switched, thereby improving the reliability of the key switch.

Further, a position-avoiding groove 3022 is formed in the guide post 302 along the axial direction of the key shaft core 3, corresponding to the outer wall of the cylinder with the second light hole 3021. When the guide post 302 is moved in the guide groove 203 in a telescopic manner, the clearance between the second light-transmitting hole 3021 and the inner wall of the guide groove 203 is sufficiently maintained by the avoiding groove 3022, so that smooth exhaust of the second light-transmitting hole 3021 is ensured, and smooth pressing feeling is further ensured when the key shaft core 3 is pressed.

In addition, referring to fig. 2 and fig. 3 again, a sounding elastic sheet 5 is disposed in a cavity formed by the mutual fastening of the rubber case 1 and the base 2; when the key shaft core 3 is pressed, the sounding elastic sheet 5 can strike the key shaft core 3 or the rubber shell 1 and give out prompt sound.

Optionally, but not limited to, as shown in fig. 2 and fig. 3, in the specific embodiment, the sounding elastic sheet 5 includes an elastic sheet insertion installation portion, an elastic bending portion and a contact portion, wherein the elastic sheet insertion installation portion is inserted and arranged on the base 2, the elastic sheet insertion installation portion is bent towards one side close to the telescopic axis of the key shaft core 3 to form the elastic bending portion, the elastic bending portion extends obliquely along the pressing direction to form the contact portion, and the contact portion corresponds to the outer wall of the key shaft core 3; when pressing button axle core 3, the elastic bending portion of sound production shell fragment 5 will receive button axle core 3's squeezing action and produce the bending deformation who upwards presses that uses shell fragment grafting installation department as the fulcrum to make the butt portion of sound production shell fragment 5 hit on button axle core 3's outer wall, and then the sound is sounded, produces the prompt tone effect.

In addition, referring to fig. 2 and fig. 3 again, a return spring 4 is disposed between the base 2 and the key shaft core 3; one end of the reset spring 4 is in operative connection with the base 2, and the other end of the reset spring 4 is in operative connection with the key shaft core 3. Specifically, the return spring 4 is sleeved on the guide post 302 and the positioning post 202, and two ends of the return spring are respectively abutted against the bottoms of the guide post 302 and the positioning post 202. In the process of pressing down the key shaft core 3, the return spring 4 is compressed and accumulates elastic potential energy; after the external pressing force is released, the compressed return spring 4 releases the elastic potential energy and drives the key shaft core 3 to automatically return so as to perform the next pressing operation.

The above embodiments are merely preferred embodiments of the present invention, and the technical solutions of the present invention are described in further detail, but the above descriptions are exemplary, not exhaustive, and are not limited to the disclosed embodiments, the scope and implementation of the present invention are not limited thereto, and any changes, combinations, deletions, substitutions or modifications that do not depart from the spirit and principle of the present invention are included in the scope of the present invention.

Claims

1. A normally closed optical axis key switch comprises a rubber shell, a base and a key shaft core, wherein the rubber shell is buckled on the base, and the key shaft core is arranged on the rubber shell in a telescopic manner; the key shaft core is provided with a guide post protruding towards one side of the base, and the base is provided with a guide groove corresponding to the guide post; when the key shaft core is pressed down, the guide post can extend into the guide groove; the bottom of the guide groove protrudes out of the bottom of the base, and a first light hole is formed in the bottom of the guide groove; and a second light hole is formed in the guide post, and when the key shaft core is pressed down in place, the second light hole corresponds to the first light hole.

2. The normally closed optical axis key switch according to claim 1, wherein the base has a positioning column protruding toward one side of the rubber housing, and the guide groove is provided on the positioning column.

3. A normally closed optical axis key switch according to claim 1, wherein the guide groove has a guide rail on an inner wall thereof.

4. The normally closed optical axis key switch according to claim 3, wherein the number of the guide rails is two or more, and the two or more guide rails are uniformly distributed.

5. A normally closed optical axis key switch according to claim 1, wherein the guide post is hollow inside and open towards the end of the base; the second light hole is connected with the hollow interior of the guide post.

6. The normally closed optical axis key switch according to claim 1, wherein the first light-transmitting hole is formed in an axial direction perpendicular to the guide groove, and the second light-transmitting hole is formed in an axial direction perpendicular to the guide post.

7. The normally closed optical axis key switch according to claim 6, wherein a clearance groove is formed on the guide post along the axial direction of the key shaft core corresponding to the outer wall of the cylinder provided with the second light transmission hole.

8. A normally closed optical axis key switch as claimed in claim 1, wherein said key shaft core has a guide ridge thereon, said base has a guide groove thereon corresponding to said guide ridge, said guide ridge being slidable along said guide groove.

9. The normally closed optical axis key switch according to claim 1, wherein a sounding elastic sheet is arranged in a cavity formed by mutually buckling the rubber shell and the base; when the key shaft core is pressed, the sounding elastic sheet can strike the key shaft core or the rubber shell and give out prompt sound.

10. The normally closed optical axis key switch according to any one of claims 1 to 9, wherein a return spring is disposed between the base and the key shaft core; one end of the reset spring is in action connection with the base, and the other end of the reset spring is in action connection with the key shaft core.