High-stability key structure

Abstract

The utility model discloses a kind of high-stability key structure including key cap, membrane circuit and bottom plate, the membrane circuit includes circuit board body and the pressing switch being arranged in the middle of the circuit board body, the key cap back center is equipped with key position pressure head, the key position pressure head is around ring and is equipped with guiding limiting structure, the bottom plate is set on the circumferential limiting support member of sliding sleeve and is connected on the guiding limiting structure;The circuit board body is attached on the surface of the bottom plate, the circuit board body is equipped with the clearance groove matched with the connecting position between the circumferential limiting support member and bottom plate, the connecting position between the circumferential limiting support member and the bottom plate is equipped with corresponding clearance. By the above-mentioned mode, the utility model can improve the stability of the entire key structure in the process of pressing key cap, reduce the production cost of single key structure.

Description

Technical Field

[0001] This utility model relates to the field of computer accessories, and in particular to a highly stable button structure. Background Technology

[0002] Traditional membrane keyboards typically consist of keycaps, scissor-switch pins / supports, membrane circuitry, and a base plate. This structure relies on the scissor-switch pins / supports to move the keycaps under pressure. However, due to the large number of parts involved and the need for tolerances during manufacturing to facilitate assembly, gaps are created in the final product. These gaps can cause the keys to rotate and wobble during pressing, affecting the user's typing experience. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide a button structure that can improve the structural stability when the button is pressed.

[0004] To solve the above-mentioned technical problems, the present invention provides a high-stability button structure, which includes a keycap, a membrane circuit, and a base plate. The thin-film circuit includes a circuit board body and a push switch located in the center of the circuit board body. A retaining edge is provided around the back of the keycap, and a key pressure head is provided at the center of the back corresponding to the push switch. The keycap is characterized by a guide limiting structure surrounding the key pressure head. A circumferential limiting support member matching the guide limiting structure is embedded in the base plate. The circumferential limiting support member and the guide limiting structure are slidably connected. The keycap can be restricted by the circumferential limiting support member to perform limited longitudinal reciprocating motion relative to the base plate. The circuit board body is attached to the surface of the base plate. The circuit board body has a clearance groove matching the connection position between the circumferential limiting support member and the base plate. The circumferential limiting support member passes through the clearance groove and connects to the base plate. A corresponding clearance space is provided at the connection position between the circumferential limiting support member and the base plate. The portion of the circuit board body located outside the circumferential limiting support member and the portion located inside the circumferential limiting support member are connected to each other through the clearance space.

[0005] In a preferred embodiment of this utility model, the guide limiting structure includes multiple sets of symmetrically arranged guide posts and at least one set of symmetrically arranged upper sliding latching members. The circumferential limiting support member has limiting posts corresponding to the guide posts and lower sliding latching members corresponding to the upper sliding latching members. The overall outline of the guide limiting structure is rectangular. There are four guide posts, which are respectively set at the four corners of the rectangle. The outer side of each guide post is set with a rounded corner structure. A set of upper sliding latching members is arranged opposite each other along the center line on the two opposite sides of the rectangle. The circumferential limiting support member includes four limiting posts corresponding to the guide posts. The inner side of each limiting post is provided with a rounded corner groove that matches the surface of the rounded corner structure on the outer side of the corresponding guide post. The circumferential limiting support member also includes two lower sliding latching members corresponding to the upper sliding latching members. The four guide posts are symmetrically divided into two groups about the centerline of the two sides where the upper sliding latch is located. Each group includes two guide posts, which are connected together by an upper connecting plate. The four limiting posts are also divided into two groups, which are connected together by a lower connecting plate. The inner side of the lower connecting plate is slidably attached to the outer side of the upper connecting plate. The clearance is provided between the lower connecting plate and the base plate. A structural reinforcing plate is provided on the outer side of the lower connecting plate. The two sides of the lower sliding latch are connected to the limiting posts on the corresponding sides. The upper sliding latch is a limiting plate, and each limiting plate has a triangular locking strip on the outer side of its lower end. The lower sliding latch is a longitudinal limiting groove plate, and each longitudinal limiting groove plate has a groove on its inner side corresponding to the triangular locking strip.

[0006] In a preferred embodiment of this utility model, a pressing avoidance hole is provided at the center of the base plate, directly opposite the position of the pressing switch.

[0007] The beneficial effects of this utility model are as follows: This utility model uses the existing embedded molding injection molding process to set a corresponding circumferential limiting support component on the base plate for the preset guide structure behind the button. The circumferential limiting support component is sleeved on the outside of the guide structure. In this way, the button will only move vertically up and down during the pressing process, and there will be no rotation or shaking problem. This not only effectively improves the structural stability during the button pressing process, but also effectively reduces the production cost of a single button structure by reducing the use of scissor feet / support frames. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the assembly structure of a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the embodiment shown; Figure 3 This is a schematic diagram of the structure of the base plate and the limiting module in the embodiment shown; Figure 4 This is a schematic diagram of the conductive film structure of the embodiment shown; Figure 5 This is a schematic diagram of the keycap structure in the embodiment shown; The components in the attached diagram are labeled as follows: 1. Keycaps; 2. Membrane circuitry; 3. Circumferential limiting support components; 4. Base plate; 101. Edge guard; 102. Key press head; 103. Limiting plate; 104. Guide post; 105. Upper connecting plate; 201. Circuit board body; 202. Push switch; 203. Push clearance hole; 301. Longitudinal limiting groove plate; 302. Limiting column; 303. Structural reinforcing block; 304. Lower connecting plate. Detailed Implementation

[0009] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0010] Please see Figures 1 to 5 The embodiments of this utility model include: A high-stability button structure includes a keycap 1, a membrane circuit 2, and a base plate 4. The membrane circuit 2 includes a circuit board body 201 and a push switch 202 located in the center of the circuit board body 201. A retaining edge 101 is circumferentially arranged on the back of the keycap 1. A key pressure head 102 is located at the center of the back corresponding to the push switch 202. A guide limiting structure is arranged around the key pressure head 102. The guide limiting structure has a rectangular overall outline and includes four guide posts 104 and a pair of limiting plates 103. The four guide posts 104 are respectively located at the four corners of the rectangle, and the outer side of each guide post 104 is rounded. The limiting plates 103 are arranged along... The two opposite sides of the rectangle are arranged with their center lines facing each other. Each limiting plate 103 has a triangular locking strip on its lower outer side. The base plate 4 is provided with a circumferential limiting support member 3 that matches the guide limiting structure by an embedded molding method. The circumferential limiting support member 3 includes four limiting posts 302 that correspond one-to-one with the guide posts 104. Each limiting post 302 has a rounded corner groove on its inner side that matches the surface of the rounded corner structure on the outer side of the corresponding guide post 104. The circumferential limiting support member 3 also includes two longitudinal limiting groove plates 301 that correspond one-to-one with the limiting plates 103. Each longitudinal limiting groove plate 301 has a groove on its inner side that corresponds to the triangular locking strip on the limiting plate 103. In this way, the circumferential limiting support member 3 can be slidably sleeved with the guide limiting structure, and the inner surface of each limiting post 302 is slidably connected with the surface of the corresponding guide post 104. The triangular strip on the limiting plate 103 can be inserted into the slot of the longitudinal limiting groove plate 301. In this way, the keycap 1 can make longitudinal reciprocating motion relative to the base plate 4 within the range limited by the slot, and the circumferential direction is limited by the four limiting posts 302, so there will be no rotation or shaking.

[0011] The circuit board body 201 is attached to the surface of the base plate 4. The circuit board body 201 is provided with a clearance groove that matches the connection position between the circumferential limiting support member 3 and the base plate 4. The circumferential limiting support member 3 passes through the clearance groove and is connected to the guide limiting structure. The connection position between the circumferential limiting support member 3 and the base plate 4 is provided with a corresponding clearance. The part of the circuit board body 101 located outside the circumferential limiting support member 3 and the part located inside the circumferential limiting support member 3 are connected to each other through the clearance.

[0012] The four guide posts 104 are symmetrically divided into two groups about the centerline of the limiting plate 103. Each group includes two guide posts 104, which are connected together by an upper connecting plate 105. The upper connecting plate 105 and the adjacent guide post 104 form a concave shape. The four limiting posts 302 are also divided into two groups accordingly. The limiting posts 302 in the same group are connected together by a lower connecting plate 304. The inner side of the lower connecting plate 304 is slidably attached to the outer side of the upper connecting plate 105. The clearance is provided between the lower connecting plate 304 and the base plate 4. A structural reinforcing plate 303 is provided on the outer side of the lower connecting plate 304. In this way, the structural strength of the guide post 104 and the limiting post 302 is significantly enhanced, so that there will be no rotation or shaking during the pressing and releasing of the button 1, and the overall action stability is significantly enhanced. Moreover, the concave shape and the clearance can avoid the area connecting the inside and outside of the circuit board body 201 when the button 1 is pressed down.

[0013] The longitudinal limiting groove plate 301 is connected to the corresponding limiting post 302 on both sides. This connection method results in greater overall bonding strength and better load-bearing capacity of the longitudinal limiting groove plate 301. During the pressing of button 1, in addition to the adhesive force between the bottom 4 and the longitudinal limiting groove plate 301, both sides can also provide synchronous support to the longitudinal limiting groove plate 301. This effectively prevents the longitudinal limiting groove plate 301 from detaching from the bottom plate 4 during repeated pressing and releasing of button 1, thus improving the overall service life.

[0014] The base plate 4 has a pressing avoidance hole 203 at its center, directly opposite the position of the push switch 202. This prevents the base plate 4 from being directly impacted during the pressing of the button 1, thus preventing the base plate 4 from deforming under stress.

[0015] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-stability button structure, comprising a keycap, a membrane circuit, and a base plate, wherein the membrane circuit includes a circuit board body and a push switch disposed in the center of the circuit board body, the keycap has a circumferentially ... The key press head is surrounded by a guide limiting structure. A circumferential limiting support member matching the guide limiting structure is embedded in the base plate. The circumferential limiting support member and the guide limiting structure are slidably sleeved together. The keycap can be restricted by the circumferential limiting support member to make limited longitudinal reciprocating movements relative to the base plate. The circuit board body is attached to the surface of the base plate. The circuit board body has a clearance groove that matches the connection position between the circumferential limiting support member and the base plate. The circumferential limiting support member passes through the clearance groove and connects to the base plate. The connection position between the circumferential limiting support member and the base plate has a corresponding clearance. The portion of the circuit board body located outside the circumferential limiting support member and the portion located inside the circumferential limiting support member are connected to each other through the clearance.

2. The high-stability button structure according to claim 1, characterized in that, The circumferential limiting support component is sleeved on the guide limiting structure. The guide limiting structure includes multiple sets of symmetrically arranged guide posts and at least one set of symmetrically arranged upper sliding snap-fit ​​components. The circumferential limiting support component is provided with limiting posts corresponding to the guide posts and lower sliding snap-fit ​​components corresponding to the upper sliding snap-fit ​​components.

3. The high-stability button structure according to claim 2, characterized in that, The overall outline of the guide limiting structure is rectangular. There are four guide posts, which are respectively set at the four corners of the rectangle. The outer side of each guide post is set with a rounded corner structure. A set of upper sliding latching parts are arranged along the center line on the two opposite sides of the rectangle. The circumferential limiting support component includes four limiting posts corresponding to the guide posts. The inner side of each limiting post is provided with a rounded corner groove that matches the surface of the rounded corner structure on the outer side of the corresponding guide post. The circumferential limiting support component also includes two lower sliding latching parts corresponding to the upper sliding latching parts.

4. The high-stability button structure according to claim 3, characterized in that, The four guide posts are symmetrically divided into two groups about the centerline of the two sides where the upper sliding snap-fit ​​is located. Each group includes two guide posts, which are connected together by an upper connecting plate. The four limiting posts are also divided into two groups accordingly, and the limiting posts in the same group are connected together by a lower connecting plate. The inner side of the lower connecting plate is slidably attached to the outer side of the upper connecting plate. The clearance is set between the lower connecting plate and the bottom plate.

5. The high-stability button structure according to claim 4, characterized in that, The outer side of the lower connecting plate is provided with a structural reinforcing plate.

6. The high-stability button structure according to claim 3, characterized in that, The two sides of the sliding snap-fit ​​are respectively connected to the corresponding limiting posts.

7. The high-stability button structure according to claim 3, characterized in that, The upper sliding latch is a limiting latch plate, and each limiting latch plate has a triangular latch strip on the lower outer side. The lower sliding latch is a longitudinal limiting groove plate, and each longitudinal limiting groove plate has a latch groove on its inner side that corresponds to the triangular latch strip.

8. The high-stability button structure according to claim 1, characterized in that, The base plate has a pressing avoidance hole at its center, directly opposite the position of the pressing switch.

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