CN115527792A - Key structure, keyboard and electronic equipment - Google Patents
Key structure, keyboard and electronic equipment Download PDFInfo
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- CN115527792A CN115527792A CN202110716213.4A CN202110716213A CN115527792A CN 115527792 A CN115527792 A CN 115527792A CN 202110716213 A CN202110716213 A CN 202110716213A CN 115527792 A CN115527792 A CN 115527792A
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- elastic body
- key
- key cap
- bottom plate
- keycap
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
- H01H13/705—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
- H01H13/7065—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys characterised by the mechanism between keys and layered keyboards
- H01H13/7073—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys characterised by the mechanism between keys and layered keyboards characterised by springs, e.g. Euler springs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
- H01H13/705—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
- H01H13/705—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
- H01H13/7065—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys characterised by the mechanism between keys and layered keyboards
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/84—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback
- H01H13/85—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback characterised by tactile feedback features
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/12—Push-buttons
- H01H3/122—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor
- H01H3/125—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor using a scissor mechanism as stabiliser
Landscapes
- Push-Button Switches (AREA)
Abstract
The embodiment of the application provides a key structure, a keyboard and electronic equipment. The key structure comprises a key cap, a supporting component and a bottom plate, wherein the bottom plate comprises a film circuit board, two ends of the supporting component are movably connected to the bottom plate and the key cap respectively, the supporting component comprises a frustum-shaped elastomer, and the elastomer is arranged between the film circuit board and the key cap. The elastomer stores energy when the key cap is pressed down, and makes the key cap reset when loosening. When the upper bottom of the elastic body is abutted against the thin film circuit board on the bottom plate, the contact part of the thin film circuit board is triggered. The back at the key cap sets up the first groove of dodging, and when the elastomer compression deformation, the protruding portion that makes progress of elastomer can the holding at the first groove of dodging, reduces elastomer and key cap and interferes and lead to the fatigue destruction of elastomer, improves the life of elastomer, reduces because the elastomer attenuate and cause the influence to the button function, realizes electronic equipment's frivolousization and satisfies that the button structure has enough long key journey, improves the use of button structure and feels.
Description
Technical Field
The embodiment of the application relates to the technical field of keys, in particular to a key structure, a keyboard and electronic equipment.
Background
A keyboard is a command and data entry device used to operate electronic equipment. A user who often uses a computer may perform a large number of keyboard input operations, the experience of striking a keyboard is important, and a key stroke which directly affects the keystroke hand feeling of the user is an important parameter for designing the keyboard. The key stroke is the distance taken by pressing a key, and the keyboard with the moderate key stroke can make people feel soft and comfortable. With the miniaturization and the lightness of electronic equipment, the thickness of the keyboard is thinner and thinner, and the thinned keyboard can correspondingly shorten the key stroke, thereby influencing the keystroke hand feeling of a user. Therefore, it is an urgent need in the art to provide a key structure that ensures a long enough key stroke while making electronic devices light and thin.
Disclosure of Invention
The embodiment of the application provides a key structure, a keyboard and electronic equipment, and solves the problem that the key structure in the prior art is difficult to ensure a long enough key range under the condition of light weight and thinness of the electronic equipment.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:
in a first aspect, a key structure is provided, which includes: the key cap, supporting component and bottom plate. The bottom plate comprises a thin film circuit board which is provided with a contact part. The key cap is provided with the first groove of dodging towards the one side of film circuit board. Two ends of the supporting component are movably connected to the base plate and the keycap respectively and used for supporting the keycap to move relative to the base plate. The supporting component comprises a frustum-shaped elastic body, the elastic body is arranged between the film circuit board and the keycap and comprises an upper bottom and a lower bottom, and the upper bottom is located in the projection of the lower bottom in the keycap in the projection of the keycap. The keycap is pressed to enable the elastic body to be compressed, the upper bottom of the compressed elastic body abuts against the space between the keycap and the contact portion, and the upward protruding portion of the compressed elastic body is contained in the first avoiding groove.
The frustum shape refers to a solid which is formed by cutting cones such as a cone, an elliptic cone and a pyramid by two parallel planes and then is positioned between the two parallel planes. The frustoconical elastic body has an approximately frustoconical appearance, and has only the top surface and side surface regions of the frustum, but does not have the bottom surface region of the frustum, and the bottom surface of the frustum has a mouth portion.
According to the key structure provided by the embodiment of the application, in the process that the keycap is pressed or loosened, the supporting component plays a role in supporting the keycap to move relative to the base plate. The elastomer stores energy when the key cap is pressed down, and makes the key cap reset when loosening. When the upper bottom of the elastic body is abutted against the thin film circuit board on the bottom plate, the contact part of the thin film circuit board is triggered. The back at the key cap sets up the first groove of dodging, and when the elastomer compression deformation, the protruding portion that makes progress of elastomer can the holding at the first groove of dodging, reduces elastomer and key cap and interferes and lead to the fatigue destruction of elastomer, improves the life of elastomer, reduces because the elastomer attenuate and cause the influence to the button function, realizes electronic equipment's frivolousization and satisfies that the button structure has enough long key journey, improves the use of button structure and feels.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the bottom plate is provided with a second avoiding groove, the keycap is pressed to compress the elastic body, and the downward protruding portion of the compressed elastic body is accommodated in the second avoiding groove. The fatigue damage of the downward convex part caused by the interference of the elastic body and the bottom plate or the thin film circuit board is reduced, the service life of the elastic body is prolonged, the lightening and thinning of the electronic equipment are further realized, and the requirement that the key structure has a long enough key stroke is met.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, a first annular portion is included between the upper bottom portion and the lower bottom portion, the first annular portion is a portion where the elastic body is compressed and then protrudes upward and contacts the keycap, and a position of the first avoiding groove corresponds to a position of the first annular portion. The upper bottom and the lower bottom comprise a second annular part between the upper bottom and the lower bottom, the second annular part is a part of the elastic body which is compressed and then contacts the bottom plate downwards, and the position of the second avoiding groove corresponds to the position of the second annular part. When the keycap is pressed to enable the upper bottom to abut against the contact part, the first annular part protrudes towards the keycap to form an upward protruding part, and at least part of the upward protruding part is accommodated in the first avoiding groove, so that the fatigue damage of the elastic body caused by the interference of the elastic body and the keycap is reduced. And the second annular part protrudes towards the bottom plate to form a downward protruding part, and at least part of the downward protruding part is accommodated in the second avoiding groove, so that the fatigue failure of the elastic body caused by the interference between the elastic body and the bottom plate is reduced.
With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the second avoiding groove is matched with the second annular portion in shape, and the second avoiding groove is annular. When the keycap is pressed down, the second annular part bends downwards and deforms to form a downward convex part with a convex surface facing the bottom plate and a concave surface facing the keycap, so that part of the annular downward convex part is accommodated in the second avoiding groove, and the condition that the second annular part interferes with the thin film circuit board or the bottom plate due to the fact that the second avoiding groove is not formed can be effectively reduced.
With reference to the second possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the second avoidance groove includes a multi-segment arc-shaped groove distributed by taking the contact point portion as a center. When the keycap is pressed down, the second annular part is bent downwards to deform, so that the plurality of parts of the downward convex part are respectively accommodated in different arc-shaped grooves, and the condition that the second annular part interferes with the thin film circuit board or the bottom plate due to the fact that the second avoiding groove is not formed is reduced.
With reference to any one of the first possible implementation manner to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the second avoidance groove is provided to penetrate through the bottom plate; or the depth of the second avoiding groove is smaller than the thickness of the bottom plate. Both of the two ways can satisfy that the second annular part of the elastic body is at least partially accommodated in the second avoiding groove when the keycap is pressed down.
With reference to any one of the first possible implementation manner to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, a projection of the first avoidance groove on the key cap surrounds a projection of the second avoidance groove on the key cap. Looking down, the first avoidance groove is arranged outside the second avoidance groove, so that the first annular part positioned on the outer side enters the first avoidance groove of the keycap when the elastic body is compressed, and the first annular part positioned on the inner side enters the second avoidance groove of the bottom plate or the thin film circuit board.
With reference to any one of the second possible implementation manner to the fourth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the first avoiding groove is matched with the first annular portion in shape, and the first avoiding groove is annular. When the keycap is pressed down, the first annular part can be bent upwards to deform, an upwards convex part with a convex surface facing the keycap and a concave surface facing the bottom plate is formed, part of the annular upwards convex part is accommodated in the first avoiding groove, and the condition that the first annular part is interfered with the back surface of the keycap due to the fact that the first avoiding groove is not formed can be effectively reduced.
With reference to any one of the first aspect to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, a depth of the first avoiding groove is smaller than a thickness of the keycap. The first avoiding groove is formed in the back face of the keycap to avoid the first annular part when the elastic body is compressed, and the first avoiding groove is not arranged to penetrate through the keycap to influence the appearance and the touch feeling of a user.
In combination with any one of the first aspect to an eighth possible implementation manner of the first aspect, in a ninth possible implementation manner of the first aspect, the supporting component further includes a first scissor foot and a second scissor foot that are pivotally connected to each other, two ends of the first scissor foot are movably connected to the bottom plate and the key cap respectively, two ends of the second scissor foot are movably connected to the bottom plate and the key cap respectively, and the elastic body is disposed in the middle of the first scissor foot and in the middle of the second scissor foot in a penetrating manner. The first scissor feet and the second scissor feet are arranged in an X shape. First scissors foot and the cooperation of second scissors foot play the key cap support with balanced effect.
With reference to any one of the first to the eighth possible implementation manners of the first aspect, in a tenth possible implementation manner of the first aspect, the supporting component includes bending rods arranged in pairs, first ends of the bending rods are pivoted to the keycap, second ends of the bending rods are slidably mounted to the base plate, and the elastic body is located between the bending rods arranged in pairs. The bent rods arranged in pairs are matched to play a role in supporting and balancing the keycap.
In a second aspect, a keyboard is provided, which includes the above key structure. The keyboard provided by the embodiment of the application adopts the key structure, so that the keyboard also has all the beneficial effects brought by the technical scheme of the embodiment.
In a third aspect, an electronic device is provided, which includes the above-mentioned key structure. The electronic device provided by the embodiment of the application adopts the key structure, so that all the beneficial effects brought by the technical scheme of the embodiment are also achieved.
Drawings
Fig. 1 is an exploded view of a keyboard according to a conventional technique;
FIG. 2 is an exploded view of one of the key structures of the keyboard of FIG. 1;
FIG. 3 is a perspective view of an elastic body in the key structure of FIG. 2;
FIG. 4 is a schematic cross-sectional view of the key structure of FIG. 3 showing compression deformation during pressing;
fig. 5 is a perspective assembly view of a key structure provided in an embodiment of the present application;
FIG. 6 is an exploded perspective view of the key structure of FIG. 5;
fig. 7 (base:Sub>A) isbase:Sub>A perspective view ofbase:Sub>A key cap in the key structure of fig. 6, (B) isbase:Sub>A perspective view of the key cap at another angle, (c) isbase:Sub>A front view of the key cap, (d) isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A in (c), and (e) is an enlarged view of (d) at point B;
FIG. 8 is a longitudinal cross-sectional view of the key structure of FIG. 5;
fig. 9 (a) and (b) are schematic cross-sectional views illustrating compressive deformation of the key structure of fig. 8 during pressing;
fig. 10 (a) and (b) are schematic structural diagrams of different angles of the bottom plate in the key structure of fig. 8.
Detailed Description
The key structure provided in the following embodiments of the present application can be applied to an electronic device with a keyboard, such as a notebook computer, a desktop computer, a mobile phone terminal, a wearable product, a tablet computer, a smart home terminal, an electronic device for an automobile, and the like.
Fig. 1 is an exploded schematic view of a keyboard provided by a conventional technology, fig. 2 is an exploded schematic view of one key structure of the keyboard of fig. 1, fig. 3 is a perspective structural view of an elastic body in the key structure of fig. 2, and fig. 4 is a schematic cross-sectional view of compression deformation of the elastic body of fig. 3 in a pressing process.
Referring to fig. 1 to 3, the conventional key structure includes a key cap 10', a scissor-type support assembly 20', an elastic body 30', a thin film circuit board 40', and a bottom plate 50'. The thin film circuit board 40 'is disposed on the base plate 50'. Scissors-type support assembly 20 'is coupled between base plate 50' and keycap 10', and functions to support and balance keycap 10'. Elastomer 30' is disposed within scissor support assembly 20' and between base plate 50' and key cap 10' for providing a return spring force to key cap 10 '. The base plate 50' may be made of metal or other hard material. Referring to FIG. 4, when keycap 10' is not depressed, keycap 10' is spaced from base 50'. When key cap 10' is pressed, elastic body 30' is compressed and deformed, and scissor-type support assembly 20' is lifted and lowered. When the upper bottom portion 33' of the elastic body 30' abuts against the contact portion 41' of the thin film circuit board 40', the contact portion 41' generates a trigger signal. When the key cap 10' is released, under the elastic action of the elastic body 30', the key cap 10' will return to the non-pressed state following the elastic body 30', and will drive the scissors-type support assembly 20' to return.
For the key structure shown in fig. 2, in order to realize the thinning of the whole structure, the thicknesses of the components which are longitudinally arranged in sequence can be thinned on the premise of ensuring enough key stroke. The longitudinal direction here is the Z direction, i.e. the pressing direction of the key structure. However, there are limits to the dimensions of some parts that cannot be thinned too much; still other components are subject to functional limitations and reduced size can present other problems.
For example, the height dimension of the elastomer 30' when uncompressed as shown in fig. 3 and 4 is H. When the key cap 10 'is pressed, the elastic body 30' is compressed and deformed, the first portion 31 'of the elastic body 30' is convexly bent upwards, the second portion 32 'is convexly bent downwards, and the height dimension of the elastic body 30' when the elastic body is completely compressed is h. By thinning the elastomer 30', the height dimension h of the elastomer 30' when fully compressed will decrease and the compression ratio of the elastomer 30' will increase. The compression ratio of the elastomer 30' refers to the ratio of the height dimension (H/H) when uncompressed and when fully compressed. Illustratively, the compression ratio of the elastomer 30 'is increased from 2.73 to 3.72 before and after thinning the elastomer 30'. When the key cap 10' is pressed, the first portion 31' of the elastic body 30' can be folded in half and interfered with the key cap 10' for fatigue fracture, and the second portion 32' can be interfered with the thin film circuit board 40' or the bottom plate 50' for extrusion fracture, so that the fatigue fracture of the elastic body 30' can be caused after multiple times of compression, and the use function of the elastic body 30' is influenced.
Fig. 5 is an assembled perspective view of a key structure provided in an embodiment of the present application, and fig. 6 is an exploded perspective view of the key structure of fig. 5. Fig. 7 (base:Sub>A) isbase:Sub>A perspective view of the key cap in the key structure of fig. 6, (B) isbase:Sub>A perspective view of the key cap at another angle, (c) isbase:Sub>A front view of the key cap, (d) isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A in (c), and (e) is an enlarged view of (d) at point B. Fig. 8 is a longitudinal sectional view of the key structure of fig. 5. Fig. 9 is a schematic cross-sectional view illustrating a compression deformation of the key structure of fig. 8 during a pressing process.
In order to ensure that the key structure has a sufficiently long key stroke and reduce fatigue failure caused by interference with other components due to multiple times of compression deformation of the elastic body under the condition of thinning and lightening the electronic device, referring to fig. 5 and 6, an embodiment of the present application provides a key structure, including: keycap 10, support assembly 20, and base plate 50. The base plate 50 includes a thin film circuit board 40 thereon, and the thin film circuit board 40 has a contact portion 41. Referring to fig. 7 (a) to (e), a first avoiding groove 11 is formed on a surface of the key cap 10 facing the thin film circuit board 40. The two ends of the supporting member 20 are movably connected to the base plate 50 and the key cap 10, respectively, for supporting the key cap 10 to move relative to the base plate 50. Referring to fig. 8, the supporting member 20 includes a frustum-shaped elastic body 30, the elastic body 30 is disposed between the thin film circuit board 40 and the key cap 10, the elastic body 30 includes an upper bottom 33 and a lower bottom 34, and a projection of the upper bottom 33 on the key cap 10 is located within a projection of the lower bottom 34 on the key cap 10. Referring to (a) and (b) of fig. 9, when the key cap 10 is pressed so that the elastic body 30 is compressed, the upper bottom portion 33 of the compressed elastic body 30 abuts between the key cap 10 and the contact portion 41, and the upward protruding portion 31a of the compressed elastic body 30 is accommodated in the first escape groove 11.
The frustum shape refers to a solid which is formed by cutting cones such as cones, elliptic cones and pyramids by two parallel planes and then is positioned between the two parallel planes. The truncated cone can be a cone, an elliptical cone or a pyramid, and the frustum shape can be divided into a circular truncated cone, an elliptical truncated cone and a frustum of a pyramid. Wherein, the edge of terrace with edge can set up the radius angle. In the present application, referring to fig. 8, the frustum-shaped elastic body 30 means that the appearance of the elastic body 30 is substantially frustum-shaped, the elastic body 30 has only the top surface and side surface regions of the frustum, does not have the bottom surface region of the frustum, and the bottom surface of the frustum has the mouth portion 341. The transverse cross-section of the elastic body 30 may be circular, oval, polygonal, rounded rectangular, etc.
The key structure provided by the embodiment of the present application, the supporting component 20 plays a role of supporting the keycap 10 to move relative to the base plate 50 during the pressing or releasing process of the keycap 10. The elastomer 30 stores energy when the key cap 10 is depressed, and resets the key cap 10 when released. When the upper bottom 33 of the elastic body 30 abuts against the thin film circuit board 40 disposed on the bottom plate 50, the contact portion 41 of the thin film circuit board 40 is triggered. The first avoiding groove 11 is formed in the back 10b of the key cap 10, when the elastic body 30 is compressed and deformed, the upward protruding portion 31a of the elastic body 30 can be accommodated in the first avoiding groove 11, so that the fatigue damage of the elastic body 30 caused by the interference of the elastic body 30 and the key cap 10 is reduced, the service life of the elastic body 30 is prolonged, the influence on the key function due to the thinning of the elastic body 30 is reduced, the electronic equipment is light and thin, the key structure has a long enough key stroke, and the use hand feeling of the key structure is improved.
In disposing the key cap 10, referring to (a) and (b) of fig. 7, the key cap 10 has a structural appearance for being pressed by a user, and the key cap 10 is disposed above the base plate 50 through the support member 20. The front face 10a of the key cap 10 is the side facing the user, and the back face 10b of the key cap 10 is the side of the key cap 10 facing the base plate 50. The key cap 10 may be an injection molded part, facilitating mass molding.
In disposing the elastic body 30, referring to fig. 8, during the process of using the key structure, the elastic body 30 is compressed and deformed, and the elastic body 30 may be made of rubber or other elastic materials. The elastic body 30 may be formed in a truncated cone shape having a mouth portion 341 on the bottom surface. When the elastic body 30 is assembled, the mouth 341 of the elastic body 30 faces the base plate 50, the upper bottom 33 faces the key cap 10, and the lower bottom 34 is connected to the base plate 50 or the thin film circuit board 40. When the lower base 34 is connected to the base plate 50, a hole may be formed at a corresponding position of the thin film circuit board 40 to allow the lower base 34 to be connected to the base plate 50.
Referring to (a) and (b) in fig. 9, during the pressing process of the key cap 10, the elastic body 30 is compressed and deformed, the upper bottom portion 33 will move towards the middle position of the lower bottom portion 34, and a part of the area of the elastic body 30 close to the lower bottom portion 34 will be bent and deformed upwards, which is called an upward convex portion 31a; a part of the region of the elastic body 30 near the upper bottom 33 is bent and deformed downward, which is referred to as a downward convex portion 32a.
In some embodiments, in order to reduce fatigue fracture of the downward convex portion 32a caused by interference between the downward convex portion 32a of the elastic body 30 and the bottom plate 50 or the thin film circuit board 40 when the elastic body 30 is compressed, similarly to providing the first avoiding groove 11 on the back surface 10b of the key cap 10 to avoid the upward convex portion 31a of the elastic body 30, referring to (a) and (b) in fig. 9, the bottom plate 50 is provided with the second avoiding groove 51, and when the key cap 10 is pressed so that the elastic body 30 is compressed, the downward convex portion 32a of the compressed elastic body 30 is accommodated in the second avoiding groove 51. The fatigue damage of the downward convex part 32a caused by the interference of the elastic body 30 and the bottom plate 50 or the thin film circuit board 40 is reduced, the service life of the elastic body 30 is prolonged, the electronic equipment is further lightened and thinned, and the requirement that the key structure has a long enough key stroke is met.
A third avoiding groove may be formed in the position of the thin film circuit board 40 corresponding to the second avoiding groove 51, and the downward protruding portion 32a at least partially passes through the third avoiding groove and is accommodated in the second avoiding groove 51. In addition, the position of the thin film circuit board 40 corresponding to the second avoidance groove 51 may not be provided with a third avoidance groove, so that the downward convex portion 32a pushes the portion of the thin film circuit board 40 located at the second avoidance groove 51 to enter the second avoidance groove 51. Both of these ways can reduce fatigue failure of the downwardly convex portion 32a when the elastic body 30 is compressively deformed.
In some embodiments, a first annular portion 31 is included between the upper bottom portion 33 and the lower bottom portion 34, the first annular portion 31 is a portion of the elastic body 30 that protrudes upward and contacts the key cap 10 after being compressed, and the position of the first avoiding groove 11 corresponds to the position of the first annular portion 31. The second annular portion 32 is included between the upper bottom portion 33 and the lower bottom portion 34, the second annular portion 32 is a portion of the elastic body 30 contacting downward to the bottom plate 50 after being compressed, and the position of the second avoiding groove 51 corresponds to the position of the second annular portion 32. That is, the elastic body 30 is provided as a lower bottom portion 34, a first annular portion 31, a second annular portion 32, and an upper bottom portion 33 connected in this order, the lower bottom portion 34 having a mouth portion 341. Wherein, the lower bottom part 34, the first annular part 31, the second annular part 32 and the upper bottom part 33 can be an integrated structure. With reference to (a) and (b) of fig. 9, when the key cap 10 is pressed to make the upper bottom portion 33 abut against the contact portion 41, the first annular portion 31 protrudes toward the key cap 10 to form an upward protruding portion 31a, and the upward protruding portion 31a is at least partially accommodated in the first avoiding groove 11, so that the interference between the elastic body 30 and the key cap 10, which results in the fatigue failure of the elastic body 30, is reduced. Moreover, the second annular portion 32 protrudes toward the bottom plate 50 to form a downward protruding portion 32a, and the downward protruding portion 32a is at least partially accommodated in the second avoiding groove 51, so that the interference between the elastic body 30 and the bottom plate 50, which results in the fatigue failure of the elastic body 30, is reduced.
When the first avoiding groove 11 is provided, the shape of the first avoiding groove 11 is matched with that of the first annular part 31, and the first avoiding groove 11 is annular. The axis of the first avoiding groove 11 and the axis of the elastic body 30 are arranged approximately coaxially, when the key cap 10 is pressed down, the first annular part 31 is bent upwards and deformed to form an upwards convex part 31a with a convex surface facing the key cap 10 and a concave surface facing the bottom plate 50, so that a part of the annular upwards convex part 31a is accommodated in the first avoiding groove 11, and the condition that the first annular part 31 interferes with the back surface 10b of the key cap 10 due to the fact that the first avoiding groove 11 is not arranged can be effectively reduced. The first avoiding groove 11 is annular, and is configured to have a shape adapted to the shape of the first annular portion 31, such as a circle, an ellipse, a rectangle with rounded corners, and the like.
In some embodiments, the depth of the first escape groove 11 is less than the thickness of the key cap 10. The thickness of the key cap 10 is the wall thickness of the key cap 10. Instead of providing the first escape groove 11 through the key cap 10 to affect the appearance and the tactile sensation of the key cap 10, the first escape groove 11 is provided on the back surface 10b of the key cap 10 to escape the first annular portion 31 when the elastic body 30 is compressed. In addition, can set up the chamfer between the first bottom surface and the medial surface of dodging groove 11, do benefit to the demolding of key cap 10 when injection moulding.
There are various implementations when the second avoiding groove 51 is provided. The first second avoidance slot is implemented in the following manner: referring to (a) and (b) of fig. 9, the second avoiding groove 51 is adapted to the shape of the second annular portion 32, the second avoiding groove 51 is annular, and the second avoiding groove 51 is continuous. The axis of the second avoiding groove 51 and the axis of the elastic body 30 are arranged approximately coaxially, when the key cap 10 is pressed down, the second annular part 32 bends and deforms downwards to form a downward convex part 32a with a convex surface facing the bottom plate 50 and a concave surface facing the key cap 10, so that a part of the annular downward convex part 32a is accommodated in the second avoiding groove 51, and the condition that the second annular part 32 interferes with the thin film circuit board 40 or the bottom plate 50 due to the fact that the second avoiding groove 51 is not arranged can be effectively reduced. The second avoiding groove 51 is annular, and is configured to have a shape adapted to the shape of the second annular portion 32, such as a circle, an ellipse, a rectangle with rounded corners, and the like.
Illustratively, the elastic body 30 is in a circular truncated cone shape having a mouth portion 341, the upper bottom portion 33 and the lower bottom portion 34 are both circular, the diameter of the upper bottom portion 33 is smaller than that of the lower bottom portion 34, and the lower bottom portion 34 has the mouth portion 341. The first annular part 31 and the second annular part 32 are both of annular structures extending along a circle, the first avoidance groove 11 and the second avoidance groove 51 are circular, and the requirement that the first annular part 31 protruding and bending upwards enters the first circular avoidance groove 11 and the second annular part 32 protruding and bending downwards enters the second circular avoidance groove 51 is met.
Illustratively, the elastic body 30 is in an elliptical table shape with a mouth 341, the upper bottom 33 and the lower bottom 34 are both elliptical, the projection of the upper bottom 33 on the key cap 10 is located in the projection of the lower bottom 34 on the key cap 10, and the lower bottom 34 has the mouth 341. The first annular part 31 and the second annular part 32 are both of annular structures extending along an ellipse, the first avoidance groove 11 and the second avoidance groove 51 are designed to be elliptical, so that the requirement that the first annular part 31 protruding and bending upwards enters the first elliptical avoidance groove 11 and the requirement that the second annular part 32 protruding and bending downwards enters the second elliptical avoidance groove 51 are met.
Illustratively, the elastic body 30 is in a shape of a truncated pyramid with the mouth 341 and the edges are set to be rounded, the upper bottom 33 and the lower bottom 34 are both rounded rectangles, the projection of the upper bottom 33 on the key cap 10 is located in the projection of the lower bottom 34 on the key cap 10, and the lower bottom 34 has the mouth 341. First annular portion 31 and second annular portion 32 are the annular structure that extends along the rounded rectangle, and the first groove of dodging 11 and the second groove of dodging 51 are established to the rounded rectangle, satisfy the first annular portion 31 that makes progress the protruding buckle and enter into the first groove of dodging 11 of rounded rectangle, and the second annular portion 32 that makes progress the protruding buckle enters into the second groove of dodging 51 of rounded rectangle.
The second implementation manner of the second avoidance slot is: fig. 10 (a) and (b) are schematic structural diagrams of different angles of the bottom plate in the key structure of fig. 8. Referring to fig. 8 and 10 (a) and (b), the second avoidance groove 51 includes a plurality of arc-shaped grooves 511 distributed centering on the contact portion 41, and the second avoidance groove 51 is discontinuous. The axes of the multi-segment arc-shaped grooves 511 and the axis of the elastic body 30 are arranged approximately coaxially, when the keycap 10 is pressed down, the second annular part 32 will bend downwards and deform, so that a plurality of parts of the downward protruding part 32a are respectively accommodated in different arc-shaped grooves 511, and the condition that the second annular part 32 interferes with the thin film circuit board 40 or the bottom plate 50 due to the fact that the second avoiding groove 51 is not arranged is reduced. The base plate 50 or the thin film circuit board 40 using the multi-segmented arc-shaped groove 511 is easy to manufacture and assemble.
In some embodiments, a second avoidance slot 51 is provided through the bottom plate 50; alternatively, the depth of the second escape groove 51 is less than the thickness of the bottom plate 50. Both of these ways satisfy that the second annular portion 32 of the elastic body 30 is at least partially accommodated in the second avoiding groove 51 when the key cap 10 is pressed down, specifically, disposed as required.
In some embodiments, in order to make the different bending deformation portions of the elastic body 30 sufficiently enter the avoidance groove, referring to (a) and (b) in fig. 9, the projection of the first avoidance groove 11 on the key cap 10 surrounds the projection of the second avoidance groove 51 on the key cap 10. The lower bottom 34, the first annular portion 31, the second annular portion 32 and the upper bottom 33 of the elastic body 30 are sequentially arranged inward along the radial direction, and the first avoiding groove 11 is arranged outside the second avoiding groove 51 when viewed from the top, so that the first annular portion 31 positioned on the outer side enters the first avoiding groove 11 of the key cap 10 when the elastic body 30 is compressed, and the first annular portion 31 positioned on the inner side enters the second avoiding groove 51 of the bottom plate 50 or the thin-film circuit board 40. When the key cap 10 is pressed down, the back surface 10b of the key cap 10 forms a pressing surface with a relatively large area in the middle area of the first avoiding groove 11, so that the pressure passing through the key cap 10 is uniformly transmitted to the top surface of the upper bottom 33 of the elastic body 30, thereby facilitating the elastic body 30 to stably generate compression deformation and improving the repeatability of the deformation of the elastic body 30.
There are different implementations when setting up the support assembly. A first implementation of the support assembly is a scissor-type support assembly: referring to fig. 6, the supporting assembly 20 includes a first scissor leg 21 and a second scissor leg 22 pivotally connected to each other, two ends of the first scissor leg 21 are movably connected to the base plate 50 and the key cap 10, two ends of the second scissor leg 22 are movably connected to the base plate 50 and the key cap 10, and the elastic body 30 is disposed through the middle of the first scissor leg 21 and the middle of the second scissor leg 22. The first scissor legs 21 and the second scissor legs 22 are arranged in an X-shape. The first end 21a of the first scissor leg 21 is pivotally connected to the key cap 10, and the second end 21b of the first scissor leg 21 is slidably mounted on the bottom plate 50. The first end 22a of the second scissor leg 22 is pivotally connected to the key cap 10, and the second end 22b of the second scissor leg 22 is slidably mounted to the base plate 50. The first end 21a and the second end 21b of the first scissor leg 21 and the first end 22a and the second end 22b of the second scissor leg 22 are parallel to each other. In the process that the key cap 10 moves up and down relative to the base plate 50, the two sliding directions of the second end 21b of the first scissor-shaped leg 21 and the second end 22b of the second scissor-shaped leg 22 are the same, and both the two sliding directions are perpendicular to the pressing direction of the key cap 10. The first scissor legs 21 and the second scissor legs 22 cooperate to support and balance the key cap 10.
When the first scissor leg 21 and the second scissor leg 22 are arranged, the first scissor leg 21 is of an inner ring structure, the second scissor leg 22 is of an outer ring structure, and the first scissor leg 21 is pivoted to the inner side of the second scissor leg 22. Referring to fig. 7 (b), the back surface 10b of the key cap 10 is provided with a first pivot seat 12, and the first end 21a of the first scissors foot 21 is pivoted to the key cap 10 through the first pivot seat 12. The back 10b of the key cap 10 is provided with a first sliding slot 13, and the second end 22b of the second scissor leg 22 is slidably mounted on the first sliding slot 13. The bottom plate 50 is provided with a second sliding slot 53, and the second end 21b of the first scissor leg 21 is slidably mounted on the second sliding slot. The base plate 50 is provided with a second pivot seat 52, and the first end 22a of the second scissor leg 22 is pivoted on the base plate 50 through the second pivot seat. This facilitates the assembly of the first scissor foot 21 and the second scissor foot 22 between the base plate 50 and the key cap 10.
The second support assembly is realized by a butterfly support assembly: the supporting component comprises bending rods arranged in pairs, the first ends of the bending rods are pivoted to the keycaps, the second ends of the bending rods are slidably mounted on the base plate, and the elastic bodies are located between the bending rods arranged in pairs. In the single bending rod, the axes of the first end and the second end of the bending rod are parallel to each other. In the process that the keycap moves up and down relative to the base plate, the first end of the bending rod rotates relative to the keycap, and the second end of the bending rod slides relative to the base plate. The bent rods arranged in pairs are matched to play a role in supporting and balancing the keycap.
When the bending rod is assembled, the back of the keycap is provided with a plurality of pin-joint seats for pin-joint of the first end of the bending rod. The bottom plate is provided with a plurality of sliding grooves for sliding assembly of the second ends of different bending rods. This facilitates the assembly of the buckling beam between the base plate and the key cap.
There are different implementations when setting up a thin film circuit board. The first thin film circuit board is implemented as follows: the thin film circuit board 40 includes a first film and a second film stacked on each other, and may be made of resin or a flexible material, and the two films are provided with conductive traces. Referring to (a) and (b) in fig. 9, when the key cap 10 is pressed down, the elastic body 30 is compressed and deformed, and when the upper bottom portion 33 of the elastic body 30 abuts against the contact portion 41 of the thin-film circuit board 40, the electrical contacts arranged on the first membrane and the second membrane are contacted to realize electrical connection, so as to realize closing of the key structure. When the key cap 10 is loosened, under the action of the elastic body 30 and the membranes, the elastic body 30 and the membranes are reset, and the corresponding electrical contacts of the first membranes and the second membranes are separated, so that the disconnection of the key structure is realized.
The second thin film circuit board is realized by the following steps: the film circuit board 40 is provided with an independent switch as a contact portion 41, such as a tact switch. When the key cap 10 is pressed down, the elastic body 30 is compressed and deformed, and the upper bottom 33 of the elastic body 30 abuts against the independent switch, so that the key structure is closed. When the key cap 10 is released, the independent switch will reset, and the key structure is disconnected.
In some embodiments, in order to make the key structure have a light emitting function, the bottom plate 50 is provided with a light source such as an LED, the light source is electrically connected to the thin film circuit board 40, the bottom plate 50 is provided with a light transmitting area, and the thin film circuit board 40 can be made of a transparent material. In operation, light generated by the light source is emitted upwardly around the key cap 10 through the light-transmitting area of the base 50 and the thin-film circuit board 40. Alternatively, a light-transmitting region is disposed on the key cap 10, so that light generated by the light source is emitted upwards through the light-transmitting region of the key cap 10.
The embodiment of the application provides a keyboard, which comprises the key structure. The keyboard provided by the embodiment of the application adopts the key structure, so that the keyboard also has all the beneficial effects brought by the technical scheme of the embodiment. When a plurality of key structures are arranged, the plurality of groups of keycaps 10, supporting assemblies 20 and elastic bodies 30 can share the same bottom plate 50 and the film circuit board 40, so that the number of parts is reduced, and the assembly efficiency is improved.
An embodiment of the application provides an electronic device, which includes the above key structure. The electronic device provided by the embodiment of the application adopts the key structure, so that all the beneficial effects brought by the technical scheme of the embodiment are also achieved. The electronic equipment with the key structure can be a notebook computer, a desktop computer, a mobile phone terminal, a wearable product, a tablet computer, an intelligent home terminal, electronic equipment for an automobile and the like.
Finally, it should be noted that: the above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. A key structure, comprising: the key cap, the supporting component and the bottom plate;
the bottom plate comprises a thin film circuit board which is provided with a contact part;
two ends of the supporting component are respectively and movably connected with the bottom plate and the keycap and used for supporting the keycap to move relative to the bottom plate;
the supporting component comprises a frustum-shaped elastic body, the elastic body is positioned between the thin film circuit board and the keycap and comprises an upper bottom and a lower bottom, and the projection of the upper bottom on the keycap is positioned in the projection of the lower bottom on the keycap;
one surface of the keycap facing the thin film circuit board is provided with a first avoidance groove;
when the keycap is pressed, the elastic body is compressed, the upper bottom of the compressed elastic body is abutted between the keycap and the contact part, and the upward protruding part of the compressed elastic body is accommodated in the first avoiding groove.
2. The key structure of claim 1, wherein the bottom plate is provided with a second escape slot, the downward protruding portion of the compressed elastic body is received in the second escape slot when the key cap is pressed so that the elastic body is compressed.
3. The key structure according to claim 2, comprising a first annular portion between the upper bottom portion and the lower bottom portion, wherein the first annular portion is a portion of the elastic body that protrudes upward and contacts the keycap after being compressed, and a position of the first escape groove corresponds to a position of the first annular portion;
the elastic body is compressed and then contacts the bottom plate downwards, and the position of the second avoidance groove corresponds to the position of the second annular part.
4. The key structure according to claim 3, wherein the second avoiding groove is adapted to the second annular portion in shape, and the second avoiding groove is annular;
or the second avoiding groove comprises a multi-section arc-shaped groove which takes the contact part as the center.
5. The key structure according to any one of claims 2 to 4, wherein the second avoidance groove is provided through the bottom plate; or the depth of the second avoidance groove is smaller than the thickness of the bottom plate.
6. The key structure of any one of claims 2-5, wherein a projection of the first avoidance slot on the key cap surrounds a projection of the second avoidance slot on the key cap.
7. The key structure according to claim 3 or 4, wherein the first avoiding groove is adapted to the shape of the first annular portion, and the first avoiding groove is annular.
8. The key structure of any of claims 1-7, wherein the first escape groove has a depth less than a thickness of the keycap.
9. The key structure of any one of claims 1 to 8, wherein the supporting assembly further comprises a first scissor leg and a second scissor leg pivotally connected to each other, two ends of the first scissor leg are movably connected to the bottom plate and the key cap, respectively, two ends of the second scissor leg are movably connected to the bottom plate and the key cap, respectively, and the elastic body is disposed through a middle portion of the first scissor leg and a middle portion of the second scissor leg;
or, the supporting component further comprises bending rods arranged in pairs, first ends of the bending rods are pivoted to the keycap, second ends of the bending rods are slidably mounted on the base plate, and the elastic bodies are located between the bending rods arranged in pairs.
10. A keyboard comprising a key structure according to any one of claims 1 to 9.
11. An electronic device, characterized in that it comprises a key structure according to any one of claims 1 to 9.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110716213.4A CN115527792A (en) | 2021-06-25 | 2021-06-25 | Key structure, keyboard and electronic equipment |
| PCT/CN2022/085484 WO2022267618A1 (en) | 2021-06-25 | 2022-04-07 | Key structure, keyboard and electronic device |
| EP22827121.9A EP4350728A1 (en) | 2021-06-25 | 2022-04-07 | Key structure, keyboard and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110716213.4A CN115527792A (en) | 2021-06-25 | 2021-06-25 | Key structure, keyboard and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115527792A true CN115527792A (en) | 2022-12-27 |
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ID=84545202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110716213.4A Pending CN115527792A (en) | 2021-06-25 | 2021-06-25 | Key structure, keyboard and electronic equipment |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4350728A1 (en) |
| CN (1) | CN115527792A (en) |
| WO (1) | WO2022267618A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7238908B1 (en) * | 2006-07-20 | 2007-07-03 | Key Mouse Electronic Enterprise Co., Ltd. | Key structure of keyboard |
| CN103050311B (en) * | 2011-10-11 | 2015-06-10 | 光宝电子(广州)有限公司 | Key structure and keyboard |
| CN202434380U (en) * | 2012-02-13 | 2012-09-12 | 叶焦明 | Key switch with waterproof structure |
-
2021
- 2021-06-25 CN CN202110716213.4A patent/CN115527792A/en active Pending
-
2022
- 2022-04-07 EP EP22827121.9A patent/EP4350728A1/en active Pending
- 2022-04-07 WO PCT/CN2022/085484 patent/WO2022267618A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022267618A1 (en) | 2022-12-29 |
| EP4350728A1 (en) | 2024-04-10 |
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