CN210575658U

CN210575658U - Keyboard key switch

Info

Publication number: CN210575658U
Application number: CN201921878913.8U
Authority: CN
Inventors: 汪大明
Original assignee: Huizhou Gateron Electronic Technology Co ltd
Current assignee: Huizhou Gateron Electronic Technology Co ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-05-19
Anticipated expiration: 2029-11-01

Abstract

The utility model discloses a keyboard key switch. The keyboard key switch comprises a rubber shell, a base and a key shaft core; the key shaft core is arranged on the rubber shell in a telescopic manner, and the rubber shell is buckled on the base; the base is provided with a spring contact terminal and a fixed contact terminal; when the key shaft core is pressed, the elastic sheet contact terminal changes in elastic deformation and is in contact with the fixed contact terminal. In the keyboard key switch, the guide hole is arranged on the key shaft core, and the guide post is arranged on the base, so that the sizes of the guide hole and the guide post can be designed to be larger, the guide is more accurate, and the use hand feeling is smoother and has no jamming; and the guide rail is arranged on the inner side surface of the guide hole, so that the contact area between the guide column and the guide hole can be effectively reduced, and the guide movement is further smooth.

Description

Keyboard key switch

Technical Field

The utility model relates to a key switch technical field, concretely relates to keyboard key switch.

Background

The key switch has the advantages of small contact resistance, accurate operation force error, diversified specifications and the like, and is widely applied to the fields of electronic equipment and white household appliances, such as audio-visual products, digital products, remote controllers, communication products, household appliances, security products, toys, computer products, fitness equipment, medical equipment, currency detecting pens, laser pen keys and the like.

In the existing key switch, especially the keyboard key switch, a guide structure is usually arranged between a key shaft core and a base. According to patent CN201820090058, the guiding structure includes a guiding pillar protruding toward the base on the key shaft core, a positioning pillar protruding toward the key shaft core on the base, and a through guiding hole formed in the middle of the positioning pillar, wherein when the key shaft core is pressed down, the guiding pillar extends into the guiding hole to perform pressing guiding.

However, the guiding structure has many disadvantages and shortcomings in the implementation process. Wherein, because the bullport setting is on the base, and presses the guide in-process, go deep into to the guiding hole by the guide post direction, consequently injectd the too big that the bullport can not be done, cause the direction precision to descend, the direction is inaccurate, feels slight jam and the phenomenon that is not smooth and easy appears in the in-service use in-process, is unfavorable for satisfying key switch, especially keyboard key switch presses smooth and easy demand.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a keyboard key switch to the defect or not enough that exist among the prior art. The guide hole of the keyboard key switch is arranged on the key shaft core, and the guide post is arranged on the base, so that the sizes of the guide hole and the guide post can be designed to be larger, the guide is more accurate, and the use hand feeling is smoother and is free from jamming; and the guide rail is arranged on the inner side surface of the guide hole, so that the contact area between the guide post and the guide hole can be effectively reduced, and the guide movement is smoother.

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

A keyboard key switch comprises a rubber shell, a base and a key shaft core; the key shaft core is arranged on the rubber shell in a telescopic manner, and the rubber shell is buckled on the base;

the base is provided with a spring contact terminal and a fixed contact terminal; when the key shaft core is pressed, the elastic sheet contact terminal generates the change of the elastic deformation quantity and is contacted with the fixed contact terminal;

a positioning groove is formed in one side, facing the rubber shell, of the base; one side of the key shaft core facing the base is provided with a positioning column corresponding to the positioning groove; when the key shaft core is pressed, the positioning column can extend into the positioning groove;

and a guide column is convexly arranged at the middle part of the positioning groove; the middle part of the positioning column is provided with a guide hole corresponding to the guide column; when the key shaft core is pressed, the positioning column can extend into the positioning groove, and the guide column extends into the guide hole.

Preferably, a guide rail is arranged on the inner wall of the guide hole.

More preferably, the length direction of the guide rail is parallel to the axial direction of the guide post.

More preferably, the number of the guide rails is two or more, and the two or more guide rails are uniformly distributed.

Still further preferably, the guide rails are 4, and the 4 guide rails are uniformly distributed.

Preferably, the guide post is provided with an air vent, and when the guide post extends into the guide hole, air between the guide post and the guide hole can be exhausted through the air vent.

More preferably, the exhaust hole is provided in a middle portion of the guide post so as to penetrate in an axial direction of the guide post.

Preferably, a pressure spring is arranged between the base and the key shaft core; the pressure spring is sleeved on the positioning column and the guide column, one end of the pressure spring is connected and acts on the key shaft core, and the other end of the pressure spring is connected and acts on the base.

Preferably, the elastic sheet contact terminal and the fixed contact terminal are both arranged on the base and are both positioned on the same side surface along the pressing axial direction;

the side surface of the key shaft core facing the elastic sheet contact terminal is provided with a convex inclined surface with the outer diameter gradually changing along the pressing direction; the elastic sheet contact terminal is provided with a bending part which is close to the pressing axial direction and bends downwards; the convex inclined surface is in contact with the bent part; the bent portion has a contact point corresponding to the fixed contact terminal in a direction perpendicular to the pressing axial direction.

More preferably, an outer diameter of the protruding slope is gradually increased in the pressing direction.

Still further preferably, the dome contact terminal is located at a position relatively far away from the pressing axial direction of the key shaft core, and the fixed contact terminal is located at a position relatively close to the pressing axial direction of the key shaft core.

More preferably, the base is further provided with a sounding elastic sheet; and in the process of contacting and conducting the elastic sheet contact terminal and the fixed contact terminal by pressing the key shaft core, the sounding elastic sheet strikes on the inner wall of the rubber shell and makes a sound.

Compared with the prior art, the utility model has the advantages of as follows and beneficial effect:

(1) the utility model discloses a keyboard key switch, the guiding hole sets up on the key shaft core, and the guide post setting is on the base for the size of guiding hole and guide post can design bigger, thereby makes the direction of pressing the process more accurate, uses and feels more smooth and easy no bite.

(2) The utility model discloses a keyboard key switch, the guiding hole inboard is provided with the guide rail, and the guide rail is the design of even symmetric distribution moreover, can effectively reduce the area of contact of guide post and guiding hole through the guide rail to make guiding motion more smooth and easy, steady, it is more smooth and easy to feel.

(3) The utility model discloses a keyboard key switch still is provided with the exhaust hole that link up in the inside of guide post, because the fit clearance of guide post and guiding hole is less, can in time discharge the compressed air that gathers in guide post and the guiding hole cooperation process through the exhaust hole, avoids the air to gather the compression and causes to press down the jam, guarantees to press down and feels smooth and easy.

Drawings

Fig. 1 is a schematic view of the overall structure of a keyboard key switch according to the present invention in an exemplary embodiment;

fig. 2 is a schematic sectional view of a key switch of the keyboard according to the present invention in an exemplary embodiment;

fig. 3 is a schematic view of an assembly structure of the keyboard key switch according to the present invention in the specific embodiment;

fig. 4 is a schematic structural view of a key shaft core in the keyboard key switch according to the present invention in the specific embodiment;

fig. 5 is a schematic structural view of a base in the keyboard key switch according to the present invention in an exemplary embodiment;

fig. 6 is a schematic structural view of a dome contact terminal in the keyboard switch according to the present invention;

fig. 7 is a schematic structural view of a fixed contact terminal in the keyboard key switch according to the present invention in an exemplary embodiment;

fig. 8 is a schematic cross-sectional structure diagram of a keyboard key switch with a sounding dome according to the present invention in an exemplary embodiment;

fig. 9 is a schematic view of an assembly structure of a keyboard key switch with a sounding dome according to the present invention in an exemplary embodiment;

fig. 10 is a schematic structural view of a sounding dome in the keyboard keyswitch with the sounding dome according to the present invention in an embodiment;

fig. 11 is a schematic view of an internal structure of a keyboard key switch with a sounding dome of the present invention in a normal state according to an embodiment of the present invention;

fig. 12 is a schematic view of an internal structure of a keyboard key switch with a sounding dome according to an embodiment of the present invention in a pressed state;

the attached drawings are marked as follows: 1-rubber shell, 2-base, 21-positioning groove, 210-guide post, 2101-exhaust hole, 3-key shaft core, 30-convex inclined surface, 31-positioning post, 310-guide hole, 3101-guide rail, 4-shrapnel contact terminal, 40-fixed part I, 41-bending part, 410-contact point, 411-contact convex part, 42-elastic connecting part, 5-fixed contact terminal, 50-fixed part II, 51-contact part, 6-pressure spring, 7-sounding shrapnel, 71-positioning part, 72-elastic bending part and 73-abutting part.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the following specific embodiments and accompanying drawings, but the scope of protection and the implementation of the present invention are not limited thereto. In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are usually placed when the products of the present invention are used, or are used only for distinguishing descriptions, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the present invention, or even as indicating or implying relative importance.

Referring to fig. 1, the key switch of the keyboard of the present invention is shown. The key switch comprises a rubber shell 1, a base 2 and a key shaft core 3; the key shaft core 3 is telescopically arranged on the rubber shell 1, and the rubber shell 1 is buckled on the base 2.

Referring to fig. 2 and 3, the base 2 is provided with a spring contact terminal 4 and a fixed contact terminal 5, and the spring contact terminal 4 and the fixed contact terminal 5 are respectively used for connecting two poles of a circuit. When the key shaft core 3 is pressed, the elastic sheet contact terminal 4 changes in elastic deformation and contacts with the fixed contact terminal 5, so that the circuit is conducted.

Wherein, a positioning groove 21 is arranged on one side of the base 2 facing the rubber shell 1; a positioning column 31 corresponding to the positioning slot 21 is arranged on one side of the key shaft core 3 facing the base 2; when the key shaft core 3 is pressed, the positioning column 31 can extend into the positioning groove 21, so that the interference phenomenon is avoided, and the pressing process is smooth.

A guide column 210 is convexly arranged at the middle part of the positioning groove 21; the positioning post 31 has a guide hole 310 at a middle portion thereof corresponding to the guide post 210. When the key shaft core 3 is pressed, the positioning column 31 can extend into the positioning groove 21, and the guiding column 210 extends into the guiding hole 310. The key shaft core 3 is accurate in downward pressing and guiding and stable in stroke through the guiding action of the guide column 210 and the guide hole 310. Moreover, set up guiding hole 310 on key shaft core 3, and guide post 210 sets up on the base, make key shaft core 3 press the direction in-process, the hole limit of guiding hole 310 receives the peripheral structure interference that is base 2 of guide post 210 to reduce, and because key shaft core 3 vertically longer, make guiding hole 310 and guide post 210 bigger that can do, thereby make key shaft core 3 press the in-process, the direction stroke between guiding hole 310 and the guide post 210 is shorter, it is more accurate to lead to, it is more smooth and easy not have the jam to use and feel.

Referring to fig. 3 and 4, the guide hole 310 is provided at an inner wall thereof with a guide rail 3101. In a preferred embodiment, the length direction of the guide rail 3101 is parallel to the axial direction of the guide post 210. Specifically, the number of the guide rails 3101 is two or more, and the two or more guide rails 3101 are uniformly distributed, and preferably 4 guide rails are uniformly distributed.

Through set up guide rail 3101 in guiding hole 310, guide rail 3101 is the evenly distributed design moreover for guide post 210 can effectively reduce the area of contact of guide post 210 and guiding hole 310 when deepening to in guiding hole 310, makes guiding motion more smooth and steady, makes the feel of pressing the button more smooth and easy.

Referring to fig. 3 and 5, the guide post 210 has a vent hole 2101 formed therein. Because the fit clearance between the guide post 210 and the guide hole 310 is small, in the guiding movement process of pressing the key shaft core 3, the air which is not timely discharged in the guide hole 310 is easily accumulated in the guide hole 310 to form compressed air in the process that the guide post 210 extends into the guide hole 310, so that the pressing of the key shaft core 3 is hindered. Therefore, the air vent 2101 is arranged on the guide post 210, when the guide post 210 extends into the guide hole 310, air between the guide post 210 and the guide hole 310 can be timely exhausted through the air vent 2101, pressing jam caused by air accumulation and compression is effectively avoided, and smooth pressing hand feeling is ensured.

Specifically, in a preferred embodiment, the exhaust hole 2101 is disposed at the middle portion of the guide post 210 in the axial direction of the guide post 210. That is, both ends of the air discharging hole 2101 are opened at both axial ends of the guide post 210, when the guide post 210 is deeply inserted into the guide hole 310, one port of the air discharging hole 2101 is communicated with the inside of the guide hole 310 and the other end is communicated to the atmosphere, and at this time, the compressed air accumulated in the guide hole 310 is timely discharged to the atmosphere through the air discharging hole 2101.

Furthermore, a compression spring 6 is provided between the base 2 and the key shaft core 3. Specifically, the pressure spring 6 is sleeved on the positioning column 31 and the guiding column 210, one end of the pressure spring is connected and acts on the key shaft core 3, the other end of the pressure spring is connected and acts on the base 2, and the specific connection acts on the positioning groove 21. Pressing key shaft core 3 and pushing down the in-process, the compression spring 6 compression is gathered elastic potential energy, makes shell fragment contact terminal 4 and fixed contact terminal 5 switch on the back, unloads the pressing force, and the compressed compression spring 6 turns into kinetic energy with elastic potential energy, orders about key shaft core 3 and upwards resumes the normal position.

In an alternative embodiment, the dome contact terminal 4 and the fixed contact terminal 5 are both disposed on the base 2 and both located on the same side along the pressing axis.

Referring to fig. 6 and 7, the side of the key shaft core 3 facing the dome contact terminal 4 has a convex slope 30 whose outer diameter gradually changes in the pressing direction. Also in an alternative embodiment, the dome contact terminal 4 includes a fixing portion i 40 fixedly mounted on the base 2, a bent portion 41 which is approached by the fixing portion i 40 in the pressing axial direction and bent downward, and an elastic connecting portion 42 for connecting the fixing portion i 40 and the bent portion 41. The convex slope 30 is in contact with the curved portion 41; the bent portion 41 has a contact point 410 corresponding to the fixed contact terminal 5 in a direction perpendicular to the pressing axial direction. Specifically, in an alternative embodiment, the fixed contact terminal 5 includes a fixing portion ii 50 fixedly mounted on the base 2, and a contact portion 51 connected to the fixing portion ii 50. When the key shaft core 3 is pressed, the contact point 410 contacts the contact portion 51, and the dome contact terminal 4 and the fixed contact terminal 5 are electrically connected.

Specifically, in an alternative embodiment, the outer diameter of the convex slope 30 becomes gradually larger in the pressing direction. Moreover, the elastic sheet contact terminal 4 is relatively located at a position far away from the pressing axial direction of the key shaft core 3, and the fixed contact terminal 5 is relatively located at a position close to the pressing axial direction of the key shaft core 3. When the key shaft core 3 is not pressed, the bent portion 41 abuts at the maximum outer diameter of the convex slope 30 of the key shaft core 3; during the process of pressing the key shaft core 3 downwards, the outer diameter of the contact part of the convex inclined surface 30 and the bending part 41 of the spring contact terminal 4 is gradually reduced, the elastic connecting part 42 releases the elastic potential energy and finally drives the contact point 410 on the bending part 41 and the contact part 51 on the fixed contact terminal 5 to be contacted with each other, so that the spring contact terminal 4 is conducted with the fixed contact terminal 5.

Further, the curved portion 41 has contact protrusions 411 on both sides of the contact point 410. The contact protrusion 411 is for direct contact with the convex slope 30, and the contact protrusion 411 is a structure that is curved and convex toward the fixed contact terminal 5, so that the elastic deformation of the elastic connection portion 42 connected with the curved portion 41 is more sensitive to the change in the outer diameter of the convex slope 30. The gap between the sound-emitting parts 411 at both sides of the contact point 410 is adapted to the size of the contact part 51, so that the contact protrusion 411 and the contact part 51 can be prevented from interfering with each other when the contact point 410 contacts the contact part 51, and the contact point 410 and the contact part 51 can be ensured to be normally contacted.

Specifically, when the key switch is in a normal state, the key shaft core 3 is not pressed, the bending portion 41 of the dome contact terminal 4 abuts against the maximum outer diameter of the protruding inclined surface 30 of the key shaft core 3, the amount of elastic deformation of the elastic connection portion 42 of the dome contact terminal 4 is at a maximum value at this time, elastic potential energy is accumulated, and the contact point 410 on the bending portion 41 and the contact portion 51 of the fixed contact terminal 5 are separated from each other and reach the maximum separation value. When the key switch is turned on and the key shaft core 3 is pressed downwards, the key shaft core 3 moves downwards, the outer diameter of the contact part of the convex inclined surface 30 of the key shaft core 3 and the bending part 41 of the elastic sheet contact terminal 4 is gradually reduced, so that the elastic deformation amount of the elastic connecting part 42 is gradually reduced, the elastic potential energy accumulated by the elastic connecting part 42 is released, and when the key shaft core 3 is gradually pressed downwards to the lowest point, the elastic potential energy accumulated by the elastic connecting part 42 drives the bending part 41 to bounce and enables the contact point 410 on the bending part 41 to be in contact with the contact part 51 on the fixed contact part 52, and the circuit is further switched on. When the pressing force on the key shaft core 3 is removed, the key shaft core 3 moves upward under the action of the elastic force of the pressure spring 6 and returns to the original position.

Referring to fig. 8 and 9, in an alternative embodiment, a sounding elastic sheet 7 is further disposed on the base 2; and in the process of contacting and conducting the elastic sheet contact terminal 4 and the fixed contact terminal 5 by pressing the key shaft core 3, the sounding elastic sheet 7 strikes on the inner wall of the rubber shell 1 and makes a sound.

Specifically, as shown in fig. 10, the sounding elastic sheet 7 includes a positioning portion 71, an elastic bending portion 72, and an abutting portion 73. The sounding elastic sheet 7 is inserted and arranged on the base 2 through a positioning part 71, the positioning part 71 is bent towards one side of the pressing shaft close to the key shaft core 3 to form an elastic bending part 72, and the elastic bending part 72 obliquely extends along the pressing direction to form an abutting part 73; the abutting portion 73 abuts against the outer wall of the key shaft core 3. Because the positioning part 71 of the sounding elastic sheet 7 is inserted into the base 2, the abutting part 73 abuts against the outer wall of the key shaft core 3, when the key shaft core 3 is pressed, the elastic bending part 72 of the sounding elastic sheet 7 is extruded by the key shaft core 3 to generate axial bending deformation which is close to the key shaft core 3 and takes the positioning part 71 as a fulcrum, so that the convex point at the maximum bending radian of the elastic bending part 72 is struck on the inner wall of the rubber case 1, and then the sound is generated.

Referring to fig. 11 and 12, in the normal state of the push switch, the key shaft core 3 is not pressed, and the elastic bending portion 72 is tightly attached to the inner wall of the rubber case 1. In the process of pressing the key shaft core 3 downwards, the key shaft core 3 presses the abutting part 73 downwards to extrude the elastic bending part 72, when the contact point 410 and the contact part 51 are contacted with each other, the elastic bending part 72 of the sounding elastic sheet 7 is simultaneously impacted on the inner wall of the rubber shell 1 by the extrusion of the key shaft core 3 and gives out sound to prompt an operator.

The above embodiments are merely preferred embodiments of the present invention, and only lie in further detailed description of the technical solutions of the present invention, but the protection scope and the implementation manner of the present invention are not limited thereto, and any changes, deletions, combinations, replacements or modifications that do not depart from the spirit and principles of the present invention will be included in the protection scope of the present invention.

Claims

1. A keyboard key switch is characterized by comprising a rubber shell (1), a base (2) and a key shaft core (3); the key shaft core (3) is telescopically arranged on the rubber shell (1), and the rubber shell (1) is buckled on the base (2);

the base (2) is provided with a spring contact terminal (4) and a fixed contact terminal (5); when the key shaft core (3) is pressed, the elastic sheet contact terminal (4) changes in elastic deformation and is in contact with the fixed contact terminal (5);

a positioning groove (21) is arranged on one side of the base (2) facing the rubber shell (1); one side of the key shaft core (3) facing the base (2) is provided with a positioning column (31) corresponding to the positioning groove (21); when the key shaft core (3) is pressed, the positioning column (31) can extend into the positioning groove (21);

a guide column (210) is convexly arranged at the middle part of the positioning groove (21); the middle part of the positioning column (31) is provided with a guide hole (310) corresponding to the guide column (210); when the key shaft core (3) is pressed, the positioning column (31) can extend into the positioning groove (21), and the guide column (210) extends into the guide hole (310).

2. A keyboard keyswitch as claimed in claim 1 wherein the guide hole (310) has a guide track (3101) on its inner wall.

3. The keyboard key switch according to claim 2, wherein the number of the guide rails (3101) is two or more, and the two or more guide rails (3101) are uniformly distributed.

4. A keyboard keyswitch as claimed in claim 1 wherein the guide post (210) has a vent hole (2101) to allow air between the guide post (210) and the guide hole (310) to escape through the vent hole (2101) when the guide post (210) is inserted into the guide hole (310).

5. A keyboard keyswitch as claimed in claim 4, wherein the vent hole (2101) is disposed through the guide post (210) in the middle of the guide post (210) in the axial direction of the guide post (210).

6. A keyboard keyswitch as claimed in claim 1, characterized in that a compression spring (6) is arranged between the base (2) and the key shaft core (3); the positioning column (31) and the guide column (210) are sleeved with the pressure spring (6), one end of the pressure spring is connected and acts on the key shaft core (3), and the other end of the pressure spring is connected and acts on the base (2).

7. A keyboard key switch according to claim 1, characterized in that said dome contact terminal (4) and said stationary contact terminal (5) are both provided on said base (2) and are both located on the same side in the pressing axis direction;

a convex inclined plane (30) with the outer diameter gradually changing along the pressing direction is arranged on the side surface of the key shaft core (3) facing the spring contact terminal (4); the spring contact terminal (4) is provided with a bending part (41) which is close to the pressing axial direction and bends downwards; the convex slope (30) is in contact with the curved portion (41); the bent portion (41) has a contact point (410) corresponding to the fixed contact terminal (5) in a direction perpendicular to the pressing axis.

8. A keyboard keyswitch as claimed in claim 7, wherein the outer diameter of the raised ramp (30) is progressively larger in the pressing direction.

9. A keyboard key switch according to claim 8, characterized in that said dome contact terminal (4) is located relatively far from the pressing axis of said key shaft core (3), and said stationary contact terminal (5) is located relatively close to the pressing axis of said key shaft core (3).

10. A keyboard key switch according to any one of claims 1-9, wherein the base (2) is further provided with a sounding dome (7); and in the process of contacting and conducting the elastic sheet contact terminal (4) and the fixed contact terminal (5) by pressing the key shaft core (3), the sounding elastic sheet (7) strikes on the inner wall of the rubber shell (1) and makes a sound.