CN216119989U

CN216119989U - Light touch switch

Info

Publication number: CN216119989U
Application number: CN202122907220.0U
Authority: CN
Inventors: 林志明
Original assignee: Zhejiang Chenming Electronics Co ltd
Current assignee: Zhejiang Chenming Electronics Co ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-03-22
Anticipated expiration: 2031-11-22

Abstract

The utility model provides a light touch switch, which comprises a dish-shaped metal elastic sheet and a switch body, wherein the dish-shaped metal elastic sheet is arranged on the switch body and is provided with an arched part and a flat plate part arranged around the bottom edge of the arched part; the switch body is provided with a first fixed contact which is arranged opposite to the arch part, two second fixed contacts which are symmetrically distributed along a first central line of the dish-shaped metal elastic sheet and are abutted against the bottom surface of the flat plate part, and two steps which are symmetrically distributed along a second central line of the dish-shaped metal elastic sheet and are abutted against the bottom surface of the flat plate part, wherein the first central line and the second central line are arranged vertically, namely the two second fixed contacts and the two steps are uniformly distributed along the circumferential direction of the bottom surface of the flat plate part of the dish-shaped metal elastic sheet, so that the dish-shaped metal elastic sheet is ensured not to incline or only inclines at a small angle after being pressed by an acting force, and the dish-shaped metal elastic sheet is well contacted with the first fixed contacts and the second fixed contacts, and the reliability is greatly improved.

Description

Light touch switch

Technical Field

The utility model relates to the technical field of switches, in particular to a light touch switch.

Background

The light touch switch is an electronic switch, also called a key switch, when in use, the switch can be switched on by lightly pressing the switch, when the hand is released, the switch is switched off, the internal structure of the light touch switch realizes the on-off by the elastic force of a metal elastic sheet (movable contact sheet), the light touch switch has the advantages of small contact resistance load, accurate operation force error, diversified specifications and the like, and is widely applied to the aspects of electronic equipment, white household appliances and the like.

The existing tact switch comprises a base, a cover plate and a button arranged on the base, wherein an installation cavity capable of accommodating a metal elastic sheet is arranged in the base, a first static contact 01 positioned at the center and two second static contacts 02 arranged at two sides of the first static contact 01 are arranged in the installation cavity. As shown in fig. 7 and 8, the metal elastic sheet 03 is a disc-shaped structure, the disc-shaped metal elastic sheet 03 includes a flat plate portion 031 and an arched portion 032 abutting against the lower end of the button, the two second stationary contacts 02 are symmetrically disposed at the bottoms of the two sides of the center of the flat plate portion 031 and used for supporting the metal elastic sheet 03, and when the button is pressed down, the button drives the arched portion of the metal elastic sheet 03 to deform and make it contact with the first stationary contact 01, so that the first stationary contact 01 is communicated with the second stationary contact 02. However, in practical applications, the inventor finds that when the button drives the metal elastic piece 03 to deform, because the contact area between the flat plate portion 031 of the metal elastic piece 03 and the second stationary contact 02 is small, the flat plate portion 031 may tilt at a certain angle relative to the second stationary contact 02 serving as a fulcrum, that is, the metal elastic piece 03 may tilt integrally, so that contact with the stationary contact is poor, even a circuit cannot be connected, and reliability is reduced.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the defect that the movable contact piece is inclined by the force of the button acting on the movable contact piece in the prior art, thereby providing the light-touch switch which can limit the inclination angle of the movable contact piece and has high reliability.

Therefore, the utility model provides a light touch switch, which comprises a dish-shaped metal elastic sheet and a switch body, wherein the dish-shaped metal elastic sheet is arranged on the switch body and is provided with an arched part and a flat plate part arranged around the bottom edge of the arched part; the switch body is provided with a first fixed contact which is arranged opposite to the arch part, two second fixed contacts which are symmetrically distributed along a first central line of the disc-shaped metal elastic sheet and are abutted against the bottom surface of the flat plate part, and two steps which are symmetrically distributed along a second central line of the disc-shaped metal elastic sheet and are abutted against the bottom surface of the flat plate part, wherein the first central line and the second central line are vertically arranged.

The step is half moon-shaped.

The switch body comprises a base, and an cover plate and a button which are arranged above the base, wherein the cover plate is fixedly connected with the base through a clamping structure.

The clamping structure comprises a slot arranged on the side surface of the base and an insertion block arranged on the side surface of the cover plate and capable of being inserted into the slot in an adaptive mode.

The slot is in a shape like a Chinese character 'ji', and the insertion block is in a shape like a Chinese character 'ji' matched with the slot.

The front end of the slot along the insertion direction of the insertion block is provided with a guide inclined plane.

The cover plate and the base are also provided with a positioning structure, the positioning structure comprises a positioning groove arranged on the base and a positioning block arranged on the cover plate and capable of being in adaptive connection with the positioning groove.

The switch body is also provided with a waterproof membrane positioned between the button and the dish-shaped metal elastic sheet.

The technical scheme of the utility model has the following advantages:

1. the utility model provides a light touch switch, which comprises a dish-shaped metal elastic sheet and a switch body, wherein the dish-shaped metal elastic sheet is arranged on the switch body and is provided with an arched part and a flat plate part arranged around the bottom edge of the arched part; the switch body is provided with a first fixed contact which is arranged opposite to the arch part, two second fixed contacts which are symmetrically distributed along a first central line of the dish-shaped metal elastic sheet and are abutted against the bottom surface of the flat plate part, and two steps which are symmetrically distributed along a second central line of the dish-shaped metal elastic sheet and are abutted against the bottom surface of the flat plate part, wherein the first central line and the second central line are arranged vertically, namely the two second fixed contacts and the two steps are uniformly distributed along the circumferential direction of the bottom surface of the flat plate part of the dish-shaped metal elastic sheet, so that the dish-shaped metal elastic sheet is ensured not to incline or only inclines at a small angle after being pressed by an acting force, and the dish-shaped metal elastic sheet is well contacted with the first fixed contacts and the second fixed contacts, and the reliability is greatly improved.

2. According to the tact switch provided by the utility model, the step is half-moon-shaped, so that the contact area between the step and the flat plate part of the dish-shaped metal elastic sheet is increased, the inclination angle of the dish-shaped metal elastic sheet can be better limited by the step, and the reliability is further improved.

3. According to the light-touch switch provided by the utility model, the clamping structure comprises the slot arranged on the side surface of the base and the inserting block which is arranged on the side surface of the cover plate and can be in adaptive insertion with the slot, and the base and the cover plate can be connected more firmly and are not easy to separate by the clamping structure.

4. According to the light-touch switch provided by the utility model, the front end of the slot along the insertion direction of the insertion block is provided with the guide inclined plane, so that the insertion block is inserted into the slot more labor-saving during assembly, the cover plate and the base are quickly and conveniently assembled, and the assembly efficiency is improved.

5. According to the light-touch switch provided by the utility model, the positioning structure is also arranged between the cover plate and the base, the positioning structure comprises the positioning groove arranged on the base and the positioning block which is arranged on the cover plate and can be in fit connection with the positioning groove, the positioning structure is convenient for accurate installation between the cover plate and the base, and the assembly efficiency is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a perspective view of a tact switch of the present invention;

FIG. 2 is a schematic illustration of the exploded structure of FIG. 1;

FIG. 3 is a perspective view of the disc-shaped metal dome of FIG. 1;

FIG. 4 is a top view of the base and the disk-shaped metal dome;

FIG. 5 is a cross-sectional view of FIG. 4;

FIG. 6 is a perspective view of the base;

fig. 7 is a perspective view of a metal spring and a fixed contact in the prior art;

fig. 8 is a cross-sectional view of fig. 7.

Description of reference numerals: 01. a first fixed contact; 02. a second fixed contact; 03. a metal spring sheet; 031. a flat plate portion; 032. an arching portion;

1. a dish-shaped metal dome; 11. an arching portion; 12. a flat plate portion; 2. a switch body; 3. a first fixed contact; 31. a second fixed contact; 4. a first centerline; 41. a second centerline; 5. a step; 6. a base; 61. a slot; 62. a guide slope; 63. positioning a groove; 7. a cover plate; 71. inserting a block; 72. positioning blocks; 8. a button; 9. a water-resistant membrane.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Examples

The present embodiment provides a tact switch, as shown in fig. 1, including a dish-shaped metal dome 1 and a switch body 2.

The disc-shaped metal dome 1 is disposed on the switch body 2, and as shown in fig. 2 and 3, has an arch portion 11 and a flat plate portion 12 disposed around the bottom edge of the arch portion 11.

The switch body 2, as shown in fig. 2, 4, 5, and 6, has a first fixed contact 3 disposed opposite to the arching portion 11, two second fixed contacts 31 disposed symmetrically along a first center line 4 of the disc-shaped metal elastic sheet 1 and abutting against a bottom surface of the flat plate portion 12, and two steps 5 disposed symmetrically along a second center line 41 of the disc-shaped metal elastic sheet 1 and abutting against a bottom surface of the flat plate portion 12, wherein the steps 5 are half-moon-shaped, a height of the steps 5 is equal to or slightly lower than a height of the second fixed contacts 31, wherein the first center line 4 and the second center line 41 are disposed vertically, the switch body 2 includes a base 6, a cover plate 7 and a button 8 disposed above the base 6, a slot 61 is disposed on a side surface of the base 6, and a guide inclined surface 62 is disposed at a front end of the slot 61 along an insertion direction of the insert block 71, a positioning groove 63 is arranged on the base 6; an insertion block 71 which can be inserted into the insertion groove 61 in an adaptive manner is arranged on the side face of the cover plate 7, a positioning block 72 which can be connected with the positioning groove 63 in an adaptive manner is arranged on the cover plate 7, and a waterproof film 9 which is positioned between the button 8 and the disc-shaped metal elastic sheet 1 is further arranged on the switch body 2.

The utility model provides a light touch switch, which comprises a dish-shaped metal elastic sheet 1 and a switch body 2, wherein the dish-shaped metal elastic sheet 1 is arranged on the switch body 2 and is provided with an arched part 11 and a flat plate part 12 arranged around the bottom edge of the arched part 11; the switch body 2 is provided with a first fixed contact 3 arranged opposite to the arch part 11, two second fixed contacts 31 symmetrically distributed along a first central line 4 of the dish-shaped metal elastic sheet 1 and abutted against the bottom surface of the flat plate part 12, and two steps 5 symmetrically distributed along a second central line 41 of the dish-shaped metal elastic sheet 1 and abutted against the bottom surface of the flat plate part 12, wherein the first central line 4 and the second central line 41 are arranged vertically, namely the two second fixed contacts 31 and the two steps 5 are uniformly distributed along the circumferential direction of the bottom surface of the flat plate part 12 of the dish-shaped metal elastic sheet 1, so that the dish-shaped metal elastic sheet 1 is ensured not to incline or only incline at a small angle after being subjected to a pressing action force, and the dish-shaped metal elastic sheet 1 is well contacted with the first fixed contact 3 and the second fixed contacts 31, and the reliability is greatly improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. A tact switch, comprising:

the switch comprises a dish-shaped metal elastic sheet (1) which is arranged on a switch body (2) and is provided with an arched part (11) and a flat plate part (12) arranged around the bottom edge of the arched part (11);

the switch body (2) is provided with a first static contact (3) opposite to the arched part (11), two second static contacts (31) which are symmetrically distributed along a first central line (4) of the disc-shaped metal elastic sheet (1) and abut against the bottom surface of the flat plate part (12), and two steps (5) which are symmetrically distributed along a second central line (41) of the disc-shaped metal elastic sheet (1) and abut against the bottom surface of the flat plate part (12), wherein the first central line (4) and the second central line (41) are vertically arranged.

2. The tact switch according to claim 1, characterized in that the step (5) is half-moon shaped.

3. The tact switch according to claim 1 or 2, wherein the switch body (2) comprises a base (6), and a cover plate (7) and a button (8) which are arranged above the base (6), wherein the cover plate (7) is fixedly connected with the base (6) through a clamping structure.

4. The tact switch according to claim 3, wherein the clamping structure comprises a slot (61) formed on a side surface of the base (6), and an insertion block (71) formed on a side surface of the cover plate (7) and adapted to be inserted into the slot (61).

5. The tact switch according to claim 4, wherein the insertion groove (61) is in a shape of a Chinese character 'ji', and the insertion block (71) is in a shape of a Chinese character 'ji' fitted into the insertion groove (61).

6. The tact switch according to claim 4 or 5, wherein a leading end of the insertion groove (61) in an insertion direction of the insertion block (71) is provided with a guide slope (62).

7. The tact switch according to claim 6, wherein a positioning structure is further disposed between the cover plate (7) and the base (6), and the positioning structure comprises a positioning slot (63) disposed on the base (6), and a positioning block (72) disposed on the cover plate (7) and adapted to be connected to the positioning slot (63).

8. The tact switch according to any one of claims 4, 5 or 7, wherein a waterproof membrane (9) is further disposed on the switch body (2) between the button (8) and the dish-shaped metal dome (1).