CN110622270B

CN110622270B - Key device supported by thin scissors and method for mounting scissors foot supports and keycaps of key device

Info

Publication number: CN110622270B
Application number: CN201880031059.3A
Authority: CN
Inventors: 陈�峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-09-15
Filing date: 2018-09-05
Publication date: 2021-06-29
Anticipated expiration: 2038-09-05
Also published as: CN110622270A; WO2019052377A1

Abstract

A key device supported by thin scissors comprises a keycap, a reset body, a switch loop and a scissors foot support, wherein the scissors foot support is respectively connected with the keycap and a support plate, the scissors foot support forms a synchronous linkage support structure through mutual force transmission to ensure that the keycap moves up and down parallel to the support plate, the reset body comprises a first reset body and a second reset body, a second sliding part of the first reset body is in sliding fit with a scissors limit part, a first convex sliding part of the first reset body is in sliding fit with a shear slope, and the first convex sliding part is pressed on the shear slope under the action of elastic force; the key cap of the key device overcomes the elastic force of the first restoring body under the action of external force, and when the key cap moves from the upper limit position to the lower limit position, the elastic force of the first restoring body is basically unchanged or gradually reduced; the key device is applied to computer keyboards, palm computers, various embedded keyboards and key devices for key striking operation, and has the characteristics of simple process, better parallelism and thinness.

Description

Key device supported by thin scissors and method for mounting scissors foot supports and keycaps of key device

Technical Field

The present invention relates to a key device for performing a key-striking operation, and more particularly to a key device mounted on a keyboard as an input device of an electronic apparatus. The invention also relates to a keyboard provided with a plurality of such key devices.

Background

A thin plastic supporting structure device is commonly adopted in a portable electronic device such as a notebook computer or a palm computer, and referring to fig. 1-5, a key device of an existing keyboard comprises a keycap 1-1, a supporting plate 5-1 with a connecting part, and two scissor supports 1-3 with upper and lower connecting parts, wherein the scissor supports 1-3 are respectively connected with the connecting part of the keycap 1-1 and the connecting part of the supporting plate 5-1 through the upper and lower connecting parts, a reset element is an elastic body (the elastic body is a rubber elastic ring 2-1), and a switch loop (the switch loop currently and commonly adopts a membrane switch circuit 4-1 with a switch contact, wherein when the rubber elastic ring 2-1 is pressed down, the rubber elastic ring 2-1 triggers the switch contact of the membrane switch circuit 4-1), and the scissor supports 1-3 are connected with a scissor upper end upper plate surface 3-8 and a scissor lower end plate surface 3 The thickness dimension between 9 is respectively connected with an upper key matching arc 1-2 and a lower key inverse matching arc 1-3 of the key cap 1-1, and the scissor foot supports 1-3 which are arranged in a v shape when viewed from the side form a synchronous linkage supporting structure through the end part contact parts near the end parts through the transmission of force between the scissor foot supports 1-3, so as to ensure that the key cap 1-1 is parallel to the supporting plate 5-1 to move up and down.

When the scissor foot supports 1-3 are in an inverted eight-type installation mode, namely, in a V-type installation mode, the scissor foot supports 1-3 are provided with extending I bending plates 3-4 and extending II bending plates 3-5, the scissor foot supports 1-3 are respectively bent upwards to form extending I bending plates 3-4 and extending II bending plates 3-5, and the end part collision part (located on the lower plate surface of the extending I bending plate 3-4) of one scissor foot support 1-3 and the end part collision part (located on the corner part of the cantilever end of the extending II bending plate 3-5) of the other scissor foot support 1-3 are in mutual contact pressure, so that the keycap 1-1 is ensured to be parallel to the supporting plate 5-1 in lifting motion.

The lower parts of the scissor leg supports 1-3 are provided with scissor collision part extension plates 3-7, the scissor collision part extension plates 3-7 are respectively bent upwards to form an extension I bending plate 3-4 and an extension II bending plate 3-5, the extension I bending plate 3-4 and the extension II bending plate 3-5 have different bending angles, after the two scissor leg supports 1-3 are installed, one of the scissor supports 1-3 is mutually supported by the corner part of the extending II bending plate 3-5 and the lower plate surface of the extending I bending plate 3-4 of the other scissor support 1-3 to form a mutual supporting matching structure, and the end part collision part of the scissor support 1-3 is respectively formed by the corner part of the extending II bending plate 3-5 and the lower plate surface of the extending I bending plate 3-4.

Referring to fig. 3 and 5, a bending arc 3-6 at the lower end of the scissors is positioned at the cantilever end of the elastic sheet metal extension arm, and a lower connecting part of the scissors foot support 1-3 is composed of a scissors lower supporting part and a scissors lower end upper plate surface 3-7 of the scissors foot support 1-3; the lower scissors supporting part and the anti-falling structure of the scissors foot supports 1-3 are both positioned on the lower end bending arc 3-6 of the scissors; the upper plate surface 3-7 at the lower end of the scissors positioned on the plate surface at the lower end of the scissors foot support 1-3 is matched with the inverted connecting part 5-4 on the inverted cantilever edge 5-3 of the support plate 5-1.

Referring to fig. 1, 2, 3 and 5, the bent and formed support plate inverted-buckled bending edge 5-2 is in an upright T shape, a support plate inverted-buckled cantilever edge 5-3 formed by symmetrical cantilevers is arranged on the support plate inverted-buckled bending edge 5-2, and an inverted-buckled connecting part 5-4 is arranged on the lower surface of the support plate inverted-buckled cantilever edge 5-3.

Referring to fig. 4, symmetrical support plate matching bosses 5-7 which are convex upwards are formed on the outer sides of two support plate inverted bending edges 5-2 which are in a right T shape, concave support plate turning lower concave surfaces 5-5 and support plate sliding lower concave surfaces 5-6 are formed on the support plate matching bosses 5-7, a scissors lower end bending arc 3-6 of a scissors foot support 1-3 is rotatably connected with the support plate turning lower concave surfaces 5-5 on a support plate 5-1, the scissors lower end bending arc 3-6 is in small displacement matching with the support plate sliding lower concave surfaces 5-6 on the support plate 5-1, and inverted connecting parts 5-4 on the support plate inverted cantilever edges 5-3 are positioned on arc surfaces near the circle center of the circular support plate turning lower concave surfaces 5-5.

The outer sides of support plate matching bosses 5-7 on the left side and the right side of a support plate 5-1 are provided with bilaterally symmetrical outer through holes, the inner sides of the support plate matching bosses 5-7 are provided with bilaterally symmetrical inner through holes, a support plate inverted bending edge 5-2 is arranged near the middle part of the inner side edge of the inner through hole, the support plate inverted bending edge 5-2 is in a T shape when viewed from the side, and inverted connecting parts 5-4 are arranged on the lower end faces of two cantilever ends of the support plate inverted cantilever edge 5-3; the extension I bending plate 3-4 and the extension II bending plate 3-5 extend into the inner side through hole of the support plate 5-1.

When the center distance between the support plate rotating concave surface 5-5 of the two scissor leg supports 1-3 and the support plate sliding concave surface 5-6 is 1.2 mm-3 mm (1.8 mm in the embodiment), the bending angles of the left and right extending plate surfaces 19 of the scissor leg supports 1-3 are respectively 65 degrees and 26 degrees, when the key cap 1-1 is pressed down, the key cap 1-1 is extremely limited when moving down from the upper limit position to the lower limit position, and the displacement of the scissor leg supports 1-3 is 0.04 mm-0.08 mm.

When the key cap 1-1 is pressed down, the key cap 1-1 overcomes the elasticity of the rubber elastic ring 2-1 to move downwards, the elasticity of the rubber elastic ring 2-1 is gradually reduced in the downward movement process of the key cap 1-1, and the elasticity of the rubber elastic ring 2-1 is gradually increased when the key cap 1-1 approaches the supporting plate 5-1; when the external force is removed, the key cap 1-1 is reset to the upper limit position.

The relationship graph of the elastic force F of the rubber elastic ring 2-1 and the stroke L of the key cap 1-1 in the process of pressing the key cap 1-1 is shown in figure 6, and the relationship graph of the elastic force F of the rubber elastic ring 2-1 and the stroke L of the key cap 1-1 forms the good hand feeling of the existing keyboard.

See application No. 2015101866538, my patent application 2015-04-18-the problem with the prior solution of example 3:

1. referring to fig. 2 and 3, when the key cap 1-1 is at the upper limit position (when the stroke of the key is maximum), the elastic force of the rubber elastic ring 2-1 acts on the key cap 1-1, the two scissor supports 1-3 connected with the key cap 1-1 are pulled upwards, the horizontal component force of the upward pulling force of the two scissor supports 1-3 is directed to the outer side of the key device, the displacement of the outward separation of the end collision parts of the scissor supports 1-3 from the corner parts of the second extension I bending plate 3-5 and the lower plate surface of the first extension I bending plate 3-4 is 0.04mm to 0.08mm, and the end collision parts of the two scissor supports 1-3 start to contact after the keys on the left side and the right side of the keystroke respectively are seriously inclined.

2. The lower end bending arc 3-6 of the scissors foot support 1-3 is rotatably connected with the support plate turning concave surface 5-5 on the support plate 5-1, the manufacturing precision requirements of the lower end bending arc 3-6 of the scissors foot support 1-3 and the support plate turning concave surface 5-5 on the support plate 5-1 are very high, and the key inclination is aggravated if the manufacturing precision of the lower end bending arc 3-6 of the scissors and the support plate turning concave surface 5-5 is high.

Disclosure of Invention

The invention aims to: the invention provides a key device which is better in parallelism and very thin and can keep contact with the end part contact parts of scissor supports 1-3 all the time in the lifting process of a keycap.

The technical scheme of the invention is realized as follows: the invention relates to a key device supported by thin scissors and a scissor support and a key cap mounting method thereof, comprising a key cap, a reset body, a switch loop and a scissor support, wherein the scissor support is respectively connected with the key cap and a support plate, and forms a synchronous linkage support structure through the transmission of force between the scissor support and the support plate so as to ensure that the key cap moves up and down parallel to the support plate, which is characterized in that: one end of the scissor leg support 1-3 is provided with an end part abutting part, a scissor lower connecting part connected with the supporting plate is arranged between the other end of the scissor leg support 1-3 and the end part abutting part, and the scissor lower connecting part is closer to the end part abutting part; the keycap 1-1 moves up and down between the upper limit position and the lower limit position, acts on the restoring body of the scissor-leg supports 1-3 or the contact part connecting body connected with the scissor-leg supports 1-3 to ensure that the end contact parts of the two scissor-leg supports 1-3 are always in mutual contact pressure, so that the force transmission between the two scissor-leg supports 1-3 is formed, and a synchronous linkage supporting structure is formed to ensure that the keycap moves up and down parallel to the supporting plate.

Including key cap, restoring body, switch circuit, scissors foot support, wherein, the scissors foot support is connected with key cap, backup pad respectively, and the scissors foot support constitutes synchronous linkage bearing structure through the transmission of each other power to ensure that the key cap is on a parallel with the backup pad and makes elevating movement, characterized by: the restoring body is composed of a first restoring body, the first restoring body is provided with two connecting parts, one connecting part of the first restoring body is connected with the connecting part of one scissor-leg support 1-3, and the other connecting part of the first restoring body is connected with the connecting part of the other scissor-leg support 1-3;

the connecting part of the first restoring body consists of a first convex sliding part and a second sliding part, and the first convex sliding part and the second sliding part form a distance L and are connected together;

the connecting part of the scissor leg supports 1-3 consists of a scissor limiting part and scissor inclined planes 3-19, the scissor limiting part is parallel to the scissor leg supports 1-3, and the scissor inclined planes 3-19 and the scissor leg supports 1-3 form a certain included angle a;

the second sliding part is in sliding fit with the shear limiting part, the first convex sliding part is in sliding fit with the shear inclined planes 3-19, and the first convex sliding part is pressed on the shear inclined planes 3-19 under the action of elastic force;

the keycap of the key device overcomes the elastic force of the first restoring body under the action of external force, and when the keycap moves from the upper limit position to the lower limit position, the elastic force of the first restoring body is basically unchanged or gradually reduced.

Further, the method comprises the following steps: the restoring body is composed of a first restoring body, the acting force of the first restoring body is applied to the two scissor leg supports 1-3, and the acting force of the first restoring body or the component force of the acting force of the first restoring body is along the x direction and points to the inner side of the key device; key cap

1-1 moves up and down along the Z direction, under the action of the first restoring body, the end part abutting parts of the two scissor support 1-3 are always kept in mutual contact pressure, and the force transmission between the two scissor support 1-3 is formed.

Further, the method comprises the following steps: the restoring body consists of a first restoring body and a second restoring body, and when the keycap 1-1 overcomes the upward component force in the Z direction generated by the elastic force of the first restoring body to move downwards along the Z direction under the action of external force, the upward component force in the Z direction generated by the elastic force of the first restoring body is reduced along with the reduction of the angle a and the angle b; after the second restoring body descends a certain position at the keycap, the second restoring body begins to generate upward force along the Z direction.

Further, the method comprises the following steps: one end of the scissors foot supports 1-3 is provided with an end part collision part, the other end of the scissors foot supports 1-3 is provided with an upper scissors connecting part matched with the keycap, the first reset body is respectively connected with the two scissors foot supports 1-3 which are mutually collided, and the elastic force of the first reset body acts between the upper scissors connecting part and the end part collision part.

Further, the method comprises the following steps: one end of the end part of the two scissors foot supports 1-3 which are mutually butted is provided with a scissors anti-disengaging part, when the key cap 1-1 of the key device is at the upper limit position and external force upwards pulls the key cap, the scissors anti-disengaging parts are in limit fit, the scissors foot supports 1-3 are prevented from being disengaged from the connecting part of the supporting plate 5-1 or the scissors anti-disengaging parts are in limit fit with the supporting plate anti-disengaging parts, and the scissors foot supports 1-3 are prevented from being disengaged from the connecting part of the supporting plate 5-1.

Further, the method comprises the following steps: the scissors anti-drop part is composed of scissors extending anti-drop plates 3-18, and the support plate anti-drop part is composed of end surface support plate anti-drop end surfaces 5-12 of support plate anti-drop holes 3-11 penetrating through the plate surface of the support plate 5-1; when the key cap 1-1 is in the upper limit position, the end part of the cantilever end of the scissors extending anti-drop plate 3-18 is positioned in the support plate anti-drop hole 3-11.

Further, the method comprises the following steps: the scissors foot supports 1-3 are provided with extension I bending plates 3-4 and extension II bending plates 3-5, the scissors foot supports are respectively bent upwards to form extension I bending plates 3-4 and extension II bending plates 3-5, the end part collision part of one of the scissors foot supports 1-3 is positioned on the lower plate surface of the extension I bending plate 3-4, the end part collision part of the other scissors foot support 1-3 is positioned near the cantilever end of the extension II bending plate 3-5, the scissors anti-falling part of one of the scissors foot supports 1-3 is formed by I limiting bending plates 3-15 formed by downward bending near the tail part of the extension I bending plate 3-4, and the scissors anti-falling part of the other scissors foot support 1-3 is positioned on the extension II bending plate 3-5.

Further, the method comprises the following steps: the scissor leg supports 1-3 of the key device are provided with scissor conflict part extension plates 3-7, the end conflict parts are positioned at the cantilever ends of the scissor conflict part extension plates 3-7, wherein the scissor conflict part extension plates 3-7 of the two scissor leg supports 1-3 are connected through scissor conflict part connectors.

Further, the method comprises the following steps: the extension plates 3-7 for the cut collision parts are flat-shaped, the collision parts at the end parts are positioned at the cantilever ends of the extension plates 3-7 for the cut collision parts or the extension plates 3-7 for the cut collision parts are bent upwards to form the extension plates 3-20 for the collision parts, and the collision parts at the end parts are positioned at the cantilever ends of the extension plates 3-20 for the collision parts or the arc surfaces of the extension plates 3-20 for the collision parts.

Further, the method comprises the following steps: the contact part connector is composed of an elastic body, a flexible body or a ring metal, the elastic body is composed of a sheet elastic body

The flexible body is formed of a sheet-like flexible body.

Further, the method comprises the following steps: the connecting part of the scissor support 1-3 consists of a scissor limiting part and a scissor inclined plane 3-19, and the scissor limiting part is parallel to the scissor support 1-3.

Further, the method comprises the following steps: the first convex sliding part protrudes outwards or inwards from the second sliding part, and the first convex sliding part is parallel to the second sliding part.

Further, the method comprises the following steps: the scissor support 1-3 is formed into a scissor I plane 3-26 and a scissor II plane 3-27, the upper connecting part of the scissor is positioned on the scissor I plane 3-26, the limiting part of the scissor is positioned on the scissor II plane 3-27, the second sliding part is in sliding fit with the scissor II plane 3-27, and the scissor I plane 3-26 is positioned above the scissor II plane 3-27.

Further, the method comprises the following steps: mounting through holes 3-25 penetrating through the plate surface are formed below the upper scissors connecting parts of the scissors foot supports 1-3 along the x direction.

Further, the method comprises the following steps: the scissor feet support 1-3 and are provided with restoring body limiters 3-28 formed on the left and right sides along the y direction.

Further, the method comprises the following steps: a key device using thin scissors support and its scissors foot support and key cap mounting method, wherein the middle part of the support plate and the middle part of the switch loop are provided with through holes penetrating through the plate surface, and a transparent convex lens 15-1 protruding upwards is arranged in the through holes.

Further, the method comprises the following steps: the key cap of the key device overcomes the elastic force of the first restoring body under the action of external force, when the key cap moves from the upper limit position to the lower limit position, the first convex sliding part moves upwards or downwards and moves inwards along the shear inclined plane 3-19, the second sliding part is limited by the shear limiting part and moves upwards or downwards and moves inwards along the plate surface of the shear foot support 1-3 or the plate surface parallel to the shear foot support 1-3, and the elastic force of the first restoring body is basically unchanged or gradually reduced.

Further, the method comprises the following steps: a complex limiting space is arranged below the shear limiting part, and the second sliding part is limited to move in the complex limiting space.

Further, the method comprises the following steps: a complex limiting space is arranged between the shear limiting part and the shear foot supports 1-3, and the second sliding part is limited to move in the complex limiting space.

Further, the method comprises the following steps: the scissor inclined planes 3-19 and the scissor foot supports 1-3 form a certain included angle a to ensure that: the keycap of the key device overcomes the elastic force of the first restoring body under the action of external force, and when the keycap moves from the upper limit position to the lower limit position, the elastic force of the first restoring body is basically unchanged or gradually reduced.

Further, the method comprises the following steps: the connecting part of the scissor foot supports 1-3 consists of 2 scissor limiting parts and 1 scissor inclined plane 3-19, and the scissor inclined planes 3-19 are positioned between the scissor limiting parts.

Further, the method comprises the following steps: the first convex sliding part is positioned between the two second sliding parts.

Further, the method comprises the following steps: the scissor foot supports 1-3 are composed of scissor foot supports 1-3 with the ends mutually butted.

Further, the method comprises the following steps: the restoring body is composed of a first restoring body and a second restoring body, and the first restoring body is parallel to the supporting plate.

Further, the method comprises the following steps: the opening of the complex body limiting space of the scissors limiting part points to the positive x direction.

Further, the method comprises the following steps: the first restoring body is composed of a steel wire and an elastic body.

Further, the method comprises the following steps: the first restoring body is composed of an annular steel wire.

Further, the method comprises the following steps: the first restoring body is composed of a tension spring.

A scissor-foot support mounting method of a key device, the scissor-foot support mounting method of the key device comprises the following steps:

respectively or simultaneously aligning the lower connecting parts of the scissors of the two scissors foot supports 1-3 with the matching space opening of the supporting plate 5-1 or the matching space opening of the keycap 1-1;

respectively or simultaneously placing the two scissor leg supports 1-3 in an angle range theta 1 and an angle range theta 2;

the scissor supports 1-3 are pushed inwards respectively or simultaneously, the scissor supports 1-3 gradually enter the matching space of the support plate 5-1 from the matching space opening of the support plate 5-1, or the scissor supports 1-3 gradually enter the matching space of the keycap 1-1 from the matching space opening of the keycap 1-1, wherein theta 1= a +. DELTA.degrees, and theta 2= b +. DELTA.degrees.

Further, the method comprises the following steps: the two scissor foot supports 1-3 are in a standing shape, and the lower connecting parts of the two scissor foot supports 1-3 are respectively or simultaneously aligned with the matching space opening of the supporting plate 5-1 or the matching space opening of the keycap 1-1;

respectively or simultaneously rotating the two scissor supports 1-3 outwards to enable the two scissor supports 1-3 to be arranged in the angle range theta 1

Within the angle range of theta 2;

the scissor supports 1-3 are pushed inwards, the scissor supports 1-3 gradually enter the matching space of the supporting plate 5-1 from the matching space opening of the supporting plate 5-1, or the scissor supports 1-3 gradually enter the matching space of the keycap 1-1 from the matching space opening of the keycap 1-1.

Further, the method comprises the following steps: when the two scissor supports 1-3 are respectively positioned at an angle theta 1 and an angle theta 2, the lower end structures of the two scissor supports 1-3 are aligned with the lower surface of the key device, wherein a = b.

Further, the method comprises the following steps: when the two scissor support legs 1-3 are respectively positioned at an angle theta 1 and an angle theta 2, the lower end structures of the two scissor support legs 1-3 do not exceed the lower plate surface of the support plate 5-1.

Further, the method comprises the following steps: the scissor-foot supports 1-3 enter the matching space of the supporting plate 5-1 or the matching space of the keycap 1-1 without obstruction.

A key cap mounting method of a key device comprises a key cap, a reset body, a switch loop and a scissor support, wherein the scissor support is respectively connected with the key cap and a support plate; one end of the scissor leg support 1-3 is provided with an end part abutting part, a scissor lower connecting part is arranged between the other end of the scissor leg support 1-3 and the end part abutting part, and the scissor lower connecting part is closer to the end part abutting part;

when the keycap 1-1 moves up and down between the upper limit position and the lower limit position, the end part contact parts of the two scissor leg supports 1-3 are always in mutual contact pressure, so that the force transmission between the two scissor leg supports 1-3 is formed, and a synchronous linkage support structure is formed;

when the key device is in a natural state, the key cap 1-1 is in an upper limit position, the upper limit angles of the scissor-foot supports 1-3 relative to the supporting plate 5-1 are respectively an angle a and an angle b, and under the action of the restoring body, the two scissor-foot supports 1-3 are limited to be in the range of

θ 1 and θ 2, where θ 1= a +. DELTA.degrees, θ 2= b +. DELTA.degrees;

the openings of the matching spaces of the keycaps 1-1 point to the inner side.

A method for mounting a key cap of a key device,

the method is characterized in that: the key cap mounting method of the key device comprises the following steps:

the key cap 1-1 and the support plate 5-1 form a certain inclination angle, the lower surface of the inclined key cap 1-1 at the low end is contacted with the upper end part of one scissor support 1-3, the key cap 1-1 is pulled inwards, the scissor anti-falling structure crosses the key limiting structure, the key part extending edge 1-12 of the key cap 1-1 at the end enters the mounting through hole 3-25 of the scissor support 1-3;

keeping the positions of the key local extended edges 1-12 and the mounting through holes 3-25 unchanged or keeping the positions of the key local extended edges 1-12 and the mounting through holes 3-25 basically unchanged, and downwards rotating the other end of the keycap 1-1 to enable the connecting part of the keycap 1-1 to cross the outer side of the upper end of the other scissor support 1-3 until the lower surface of the keycap 1-1 is contacted with the upper end of the scissor support 1-3;

the key cap 1-1 is pressed downwards or the key cap 1-1 and the combination thereof are pulled downwards and rightwards, the scissors anti-falling structure on the left side crosses the key limiting structure on the left side, and the key cap is installed.

The invention has the positive effects that:

the ultra-thin key device adopting the end support has the positive effects that:

1. acting on the restoring body of the scissor foot supports 1-3 or the interference part connecting body connected with the scissor foot supports 1-3, under the action of the elastic force and the interference part connecting body, the end interference parts of the keycaps 1-3 are always kept in contact in the lifting process, so that the parallelism of the keycaps in the lifting process is better, and the influence of the processing precision of the end interference parts on the parallelism of the keycaps in the lifting process is eliminated;

2. acting on the restoring body of the scissor-leg supports 1-3 or the interference part connecting body connected with the scissor-leg supports 1-3, under the action of elastic force and the action of the interference part connecting body, the two scissor-leg supports 1-3 and the supporting plate 5-1 are in sliding connection (the two scissor-leg supports 1-3 can also be in rotating connection and sliding connection with the supporting plate 5-1, but the sliding connection is the best), and the processing precision of the connecting parts of the scissor-leg supports 1-3 and the processing precision of the connecting parts of the supporting plate 5-1 have smaller influence on the parallelism of the keycap;

3. the first reset body adopts a tension spring, an annular steel wire 8-1 and an annular rubber band 7-1, so that the low height of the key device is further realized, and a good hand feeling is obtained;

4. by adopting the flaky conflict part connecting body to connect the scissor leg supports 1-3, the conflict part structure at the end parts of the scissor leg supports 1-3 is greatly simplified, and the low height of the key device is further realized.

The ultrathin key device adopting end support can be widely applied to computer keyboards, palm computers, various embedded keyboards and key devices for key striking operation; the invention provides a key device which is simple in process, better in parallelism and very thin.

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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is an exploded perspective view of a prior art key assembly employing sheet metal ends to support scissor legs;

FIG. 2 is a perspective view of a prior art key assembly using sheet metal ends to support scissor legs;

FIG. 3 is a cross-sectional view of a prior art key assembly using sheet metal ends to support scissor legs;

FIG. 4 is a cross-sectional view of a prior art key assembly using sheet metal ends to support scissor legs;

FIG. 5 is a cross-sectional view of a prior art key assembly using sheet metal ends to support scissor legs;

FIG. 6 is a force versus displacement graph of a prior art key arrangement using sheet metal ends to support scissor legs;

fig. 7 is an exploded perspective view of a key device of the first restoring body of the present invention using a tension spring;

FIG. 8 is a perspective view of the sheet metal end support shears of the present invention;

fig. 9 is a perspective view of a key device of the first restoring body of the present invention using a tension spring;

fig. 10 is a perspective view of a key device of the present invention in which a first restoring body employs a tension spring;

fig. 11 is a front view of a key device of the first restoring body of the present invention using a tension spring;

FIG. 12 is a view of the key cap of the present invention in an upper lateral limit;

FIG. 13 is a sectional view A-A of the keycap of FIG. 11 in an upper limit position;

FIG. 14 is a sectional view B-B of the keycap of FIG. 11 in an upper limit position;

FIG. 15 is a cross-sectional view C-C of the keycap of FIG. 11 in an upper limit position;

FIG. 16 is a view of the key cap of the present invention in a lower lateral limit;

FIG. 17 is a sectional view A-A of the keycap of FIG. 11 in a lower limit position;

FIG. 18 is a cross-sectional view B-B of the keycap of FIG. 11 in a lower limit position;

FIG. 19 is a cross-sectional view B-B of the key cap of FIG. 11 in a lower limit position;

fig. 20 is a force versus displacement graph of a key device using a tension spring for a first restoring body according to the present invention;

fig. 21 is a perspective view of a key device of the first reduction body of the present invention using rubber band;

FIG. 22 is a perspective view of a key assembly of the first reduction body of the present invention using a ring-shaped wire;

FIG. 23 is a perspective view of a key assembly of the present invention having a first reduction member with an annular wire and a plate retention hole;

FIG. 24 is a cross-sectional view of an extreme position on the keycap of FIG. 23;

FIG. 25 is a schematic view of the key cap of FIG. 24 in a lower limit position;

FIG. 26 is a cross-sectional view of an extreme position on the keycap of FIG. 23;

FIG. 27 is a schematic view of the key cap of FIG. 26 in a lower limit position;

FIG. 28 is a schematic view of a first restoring body of the present invention employing obliquely installed compression springs;

FIG. 29 is a perspective view of a key assembly of the first reduction body of the present invention employing a convex wire;

FIG. 30 is a side view of FIG. 29;

FIG. 31 is a perspective view of a key device of the present invention in which a first restoring body is made of a magnetic material;

FIG. 32 is a perspective view of the key cap of FIG. 31 in a lower limit position;

FIG. 33 is a side view of another first restoring body of the present invention acting on the sheet metal end support scissor leg attachment;

FIG. 34 is a schematic view of FIG. 33 in an upper limit position;

FIG. 35 is a perspective view of the sheet metal end support shears of the present invention;

FIG. 36 is a perspective view of a key assembly of the present invention employing an alternative shear interference interface;

FIG. 37 is a perspective view of the key assembly of the present invention employing a shear interference connector and a first reduction body employing a ring wire; FIG. 38 is a schematic view of FIG. 37 in a lower limit position;

FIG. 39 is a perspective view of another alternative key assembly of the present invention employing shear interference connectors;

FIG. 40 is a partial enlarged view of FIG. 39;

FIG. 41 is a front view of the key device of the present invention employing a shear interference interface connection;

FIG. 42 is a side view of FIG. 41;

FIG. 43 is an enlarged partial view of FIG. 42;

FIG. 44 is a perspective view of another alternative key assembly of the present invention employing shear interference connectors;

FIG. 45 is a perspective view of a key assembly of the present invention employing an alternative shear interference connector;

FIG. 46 is a perspective view of the key assembly of the present invention employing a shear interference connector and a first reduction body employing an annular wire; FIG. 47 is a schematic view of FIG. 37 in a lower limit position;

FIG. 48 is a perspective view of another alternative key assembly of the present invention employing shear interference connectors;

FIG. 49 is a partial enlarged view of FIG. 39;

FIG. 50 is a front view of the key device of the present invention employing a shear interference interface connection;

FIG. 51 is a side view of FIG. 41;

FIG. 52 is an enlarged partial view of FIG. 42;

FIG. 53 is a perspective view of another alternative key arrangement of the present invention employing a shear interference connector;

FIG. 54 is a partial enlarged view of FIG. 39;

FIG. 55 is a front view of the key device of the present invention employing a shear interference interface;

FIG. 56 is a side view of FIG. 41;

FIG. 57 is a schematic view of the key arrangement of FIG. 56 in a lower limit position;

FIG. 58 is an enlarged fragmentary view of FIG. 42;

FIG. 59 is a front view of the key device of the present invention employing a shear interference connector;

FIG. 60 is a front view of a key device of the present invention employing shear interference connectors;

FIG. 61 is a front view of the key device of the present invention employing a shear interference interface connection;

FIG. 62 is a perspective view of another alternative key device of the present invention employing shear interference connectors;

FIG. 63 is a perspective view of another alternative key assembly of the present invention employing shear interference connectors;

FIG. 64 is a partial enlarged view of FIG. 39;

FIG. 65 is a front view of a key device of the present invention employing a shear interference interface;

FIG. 66 is a side view of FIG. 41;

FIG. 67 is an enlarged partial view of FIG. 42;

FIG. 68 is a perspective view of another alternative key device of the present invention employing shear interference connectors;

FIG. 69 is a perspective view of a key assembly of the present invention employing an alternative shear interference connector;

FIG. 70 is a perspective view of the key assembly of the present invention employing a shear interference connector and a first reduction body employing an annular wire; FIG. 71 is a schematic view of FIG. 37 in a lower limit position;

FIG. 72 is a perspective view of another alternative key arrangement of the present invention employing shear interference connectors;

FIG. 73 is a partial enlarged view of FIG. 39;

FIG. 74 is a front view of the key device of the present invention employing a shear interference interface;

FIG. 75 is a side view of FIG. 41;

FIG. 76 is an enlarged fragmentary view of FIG. 42;

FIG. 77 is a perspective view of another alternative key assembly of the present invention employing shear interference connectors;

FIG. 78 is a partial enlarged view of FIG. 39;

FIG. 79 is a front view of a key device of the present invention employing a shear interference connector;

FIG. 80 is a side view of FIG. 41;

FIG. 81 is a front view of a key device of the present invention employing a shear interference interface connection;

figure 82 is a perspective view of another key device of the present invention employing shear interference connectors.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, 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.

Example 1

Referring to fig. 7 to 34, a key assembly using thin scissors support and a method for mounting a scissors support and a key cap thereof according to the present invention includes a key cap, a reset body, a switch circuit, and a scissors support, wherein the scissors support is respectively connected to the key cap and a support plate, and the scissors support forms a synchronous linkage support structure by mutual force transmission to ensure that the key cap moves up and down parallel to the support plate, and is characterized in that: one end of the scissor leg support 1-3 is provided with an end part abutting part, a scissor lower connecting part connected with the supporting plate is arranged between the other end of the scissor leg support 1-3 and the end part abutting part, and the scissor lower connecting part is closer to the end part abutting part; the keycap 1-1 moves up and down between the upper limit position and the lower limit position, acts on the restoring body of the scissor-leg supports 1-3 or the contact part connecting body connected with the scissor-leg supports 1-3 to ensure that the end contact parts of the two scissor-leg supports 1-3 are always in mutual contact pressure, so that the force transmission between the two scissor-leg supports 1-3 is formed, and a synchronous linkage supporting structure is formed to ensure that the keycap moves up and down parallel to the supporting plate.

The restoring body is composed of a first restoring body, the acting force of the first restoring body is applied to the two scissor leg supports 1-3, and the acting force of the first restoring body or the component force of the acting force of the first restoring body is along the x direction and points to the inner side of the key device; when the keycap 1-1 moves up and down along the Z direction, under the action of the elastic force of the first restoring body, the end part abutting parts of the two scissor supports 1-3 are always kept in mutual contact pressure through the elastic force, and the force transmission between the two scissor supports 1-3 is formed.

The restoring body consists of a first restoring body and a second restoring body, and when the keycap 1-1 overcomes the upward component force in the Z direction generated by the first restoring body and moves downwards along the Z direction under the action of external force, the upward component force in the Z direction generated by the first restoring body is reduced along with the reduction of the angle a and the angle b; after the second restoring body descends a certain position at the keycap, the second restoring body begins to generate upward force along the Z direction.

One end of the scissors foot supports 1-3 is provided with an end part abutting part, the other end of the scissors foot supports 1-3 is provided with an upper scissors connecting part matched with the keycap, the acting force of the first restoring body is positioned between the upper scissors connecting part and the end part abutting part, and the first restoring body is respectively matched with the upper scissors connecting part and the end part abutting part

The two mutually butted scissor supports 1-3 are connected.

The scissors foot supports 1-3 are provided with extension I bending plates 3-4 and extension II bending plates 3-5, the scissors foot supports are respectively bent upwards to form extension I bending plates 3-4 and extension II bending plates 3-5, the end part collision part of one of the scissors foot supports 1-3 is positioned on the lower plate surface of the extension I bending plate 3-4, the end part collision part of the other scissors foot support 1-3 is positioned near the cantilever end of the extension II bending plate 3-5, the scissors anti-falling part of one of the scissors foot supports 1-3 is formed by I limiting bending plates 3-15 formed by downward bending near the tail part of the extension I bending plate 3-4, and the scissors anti-falling part of the other scissors foot support 1-3 is positioned on the extension II bending plate 3-5.

One end of the end part of the two scissors foot supports 1-3 which are mutually butted is provided with a scissors anti-disengaging part, when the key cap 1-1 of the key device is at the upper limit position and external force upwards pulls the key cap, the scissors anti-disengaging parts are in limit fit, the scissors foot supports 1-3 are prevented from being disengaged from the connecting part of the supporting plate 5-1 or the scissors anti-disengaging parts are in limit fit with the supporting plate anti-disengaging parts, and the scissors foot supports 1-3 are prevented from being disengaged from the connecting part of the supporting plate 5-1.

Referring to fig. 7 and 9, the key device is composed of a key cap 1-1, a restoring body, a switch loop, two scissor supports 1-3 and a support plate 5-1, wherein the two scissor supports 1-3 are identical in structure and size, the first restoring body is an elastic element arranged between the two scissor supports 1-3, the elastic element is a tension spring 6-1, the tension spring 6-1 is parallel to the support plate 5-1, the key cap 1-1 is composed of a key shell 1-4 and a key support 1-5, and the lower surface of the key cap 1-1 is fixedly connected with the upper surface of the key support 1-5; the key connecting part is arranged on the key support 1-5, the key shell 1-4 is positioned above the key support 1-5, and the characters of the keys are printed on the upper surface of the key shell 1-4;

the restoring body consists of a first restoring body and a second restoring body, the first restoring body is a tension spring 6-1, and the second restoring body consists of a spring shearing sheet 3-10;

the switch loop is composed of a film switch circuit 4-1 with a switch contact (adopted in the embodiment), and the switch loop can also be a detection switch (such as an optical switch, a capacitance switch and the like) for detecting the pressing of the keycap 1-1 in other forms;

the connecting part of the supporting plate 5-1 is composed of four independent bending parts, each of the four independent bending parts is composed of a supporting plate and a vertical plate 5-7, each supporting plate and a transverse plate 5-8, the four independent bending parts are sequentially arranged along the Y direction, the connecting parts of the supporting plate 5-1 are all opened outwards, and the supporting plate and the vertical plates 5-7 are used for forming a middle limiting part of the supporting plate.

Referring to fig. 8, the elastic shear blades 3-10 extend in the x direction and are symmetrically positioned at two sides of the scissor leg support 1-3, the elastic shear blades 3-10 extend to the vicinity of the upper end of the scissor leg support 1-3 in the Y direction and the Z direction, a certain included angle is formed between the elastic shear blades 3-10 and the plane of the scissor leg support 1-3, an elastic shear blade switch contact arc 3-11 with an arc surface is formed at the cantilever end of the elastic shear blades 3-10 in a stamping manner, and the elastic shear blade switch contact arc 3-11 is positioned on the lower plate surface of the elastic shear blade 3-10;

one end of each scissors foot support 1-3 is provided with an end part abutting part, the other end of each scissors foot support 1-3 is provided with an upper scissors connecting part, and each upper scissors connecting part is composed of a scissors anti-falling structure, an upper scissors upper end lower plate surface 3-9 and an upper scissors upper end upper plate surface 3-8; with scissors-foot supports 1-3

The scissors anti-disengaging structure is independently arranged and consists of scissors limit stops 3-3, an elastic metal plate elastic arm 3-2 is formed on a scissors foot support 1-3, and the scissors limit stops 3-3 are formed at the cantilever end of the metal plate elastic arm 3-2 in a bending mode;

the end part collision part of the scissor foot support 1-3 is composed of the lower plate surface of a first extending bending plate 3-4 and the upper surface of a collision bending plate 3-14 near the cantilever end of a second extending bending plate 3-5, the first extending bending plate 3-4 and the second extending bending plate 3-5 are arranged along the y direction, and a first limiting bending plate 3-15 formed by downward bending is arranged near the tail part of the first extending bending plate 3-4;

the lower connecting part of the scissors is composed of a lower shearing matched arc 3-13 and an upper shearing matched arc 3-16, wherein the lower shearing matched arc 3-13 is concentric with the upper shearing matched arc 3-16; the cut-off matching arcs 3-13 are formed by bending the extension plates in the-Z direction, and the cut-off matching arcs 3-16 are formed by bending the extension plates in the-Z direction and then bending the tail parts of the extension plates in the Z direction; the middle part of the scissor foot support 1-3 along the y direction is provided with a scissor through hole 3-17, and the scissor elastic hook 3-12 is positioned near the upper part of the scissor through hole 3-17.

The elastic cutting hook 3-12 is positioned between the end part collision part and the upper end of the scissor leg support 1-3, the elastic cutting hook 3-12 is positioned near the middle part between the end part collision part and the upper end of the scissor leg support 1-3, but the elastic cutting hook 3-12 is preferably positioned near the middle upper part between the end part collision part and the upper end of the scissor leg support 1-3.

Referring to fig. 9, the two scissor leg supports 1-3 which are in interference fit with each other have the same structure and size, and in order to ensure that the two scissor leg supports 1-3 which are in interference fit with each other are produced in the same pair of dies; the tension spring 6-1 is respectively connected with the elastic shearing hooks 3-12 of the scissor supports 1-3, the end parts of the two scissor supports 1-3 are mutually butted under the action of the elasticity of the tension spring 6-1, the shearing matching arcs 3-13 of the two scissor supports 1-3 and the support plate matching vertical plate 5-7 are respectively provided with a small gap of 0.05 mm-0.1 mm, and the support plate matching vertical plate 5-7 limits the two scissor supports 1-3 to be near the middle part of the support plate 5-1 along the x direction;

the tension spring 6-1 is composed of two connected tension springs, the two tension springs 6-1 are connected and are in a closed frame shape, and the tension spring 6-1 can also be composed of one tension spring; one end of the tension spring 6-1 is connected with the elastic shearing hook 3-12 of one scissor support 1-3, and the other end of the tension spring 6-1 is connected with the elastic shearing hook 3-12 of the other scissor support 1-3.

Referring to fig. 7 and 10, the connecting part of the keycap 1-1 is positioned on the bent edge of the key support 1-5, the key support 1-5 is formed by stamping a sheet metal, and the connecting part of the keycap 1-1 is formed by the lower plate surface of the key support 1-5, the key lower inverted buckle arc 1-3 and the key limiting structure; the key support 1-5 is punched and formed with I bending edges 1-8 and II bending edges 1-9, wherein the I bending edges 1-8 are connected with the upper plate surface of the key support 1-5 to form a certain included angle, and the II bending edges 1-9 are connected with the I bending edges 1-8 to form a certain included angle; the key lower back-off matching arc 1-3 is positioned near the inner side end of the II bending edge 1-9, the inner sides of the II bending edges 1-9 are provided with front slope surface bending edges formed by bending a certain angle along the-Z direction, and the key lower back-off matching arc 1-3 is formed by a back-off matching arc in an arc surface shape; the key limiting structure of the keycap 1-1 is composed of independently arranged key limiting end faces 1-6, the key limiting end faces 1-6 are positioned at cantilever ends of independently extending elastic key elastic arms 1-7, and a space is arranged above the key elastic arms 1-7 of the cantilevers.

Referring to FIG. 12, under the action of external force, the keycap 1-1 overcomes the component force generated by the tension spring 6-1 in the Z direction and upwards along the Z direction

When the tension spring moves downwards, the component force generated by the tension spring 6-1 in the Z direction and upwards is reduced along with the reduction of the angle a and the angle b; after the key cap descends for a certain position, the elastic shearing sheets 3-10 start to generate upward force along the Z direction.

The shear strips 3-10 (second restoring bodies) can also be eliminated, and the second restoring bodies are formed by elastic rubber or elastic elements, and the rubber or elastic elements can be arranged on the upper surface of the membrane switch circuit 4-1 corresponding to the four corner positions of the keycap or arranged on the upper surface of the membrane switch circuit 4-1 corresponding to the middle position of the keycap (not shown in the scheme).

The second restoring body may also be a cantilever spring extending downward from the key holder 1-5, and when the key cap 1-1 approaches the lower limit position, the cantilever spring extending downward from the key holder 1-5 comes into contact with the upper surface of the membrane switch circuit 4-1 (not shown in this embodiment).

The second restoring body can also be a cantilever spring extending upwards from the support plate 5-1, and when the keycap 1-1 approaches the lower limit position, the cantilever spring extending upwards from the support plate 5-1 starts to contact with the keycap 1-1 or the scissor-foot support 1-3 (not shown in this scheme).

Referring to fig. 13 and 15, the key cap 1-1 is at the upper limit position (the key cap 1-1 is at the highest position), and the scissors foot support 1-3 is connected with the key lower back-off matching arc 1-3 and the key upper matching arc 1-2 of the key support 1-5 through the thickness dimension between the scissors upper end upper plate surface 3-8 and the scissors upper end lower plate surface 3-9; the lower plate surface (end part collision part) of the first extending bending plate 3-4 of one scissor leg support 1-3 is in collision fit with the upper surface (end part collision part) of the collision bending plate 3-14 of the second extending bending plate 3-5 of the other scissor leg support 1-3; the scissors anti-disengaging portion is cut the anti-disengaging portion by I, II spacing portions constitute, when the key cap of key device is in the upper limit position, when external force upwards pulls the key cap, the anti-disengaging portion is cut to I that one of them scissors foot supported 1-3 is located tip conflict portion side and with the spacing cooperation of II spacing portions of another scissors foot support 1-3, I cuts the anti-disengaging portion and comprises I spacing board of bending 3-15, I spacing board of bending 3-15 and the spacing cooperation of II spacing portions, prevent scissors foot support 1-3 from deviating from the connecting portion of backup pad 5-1, II spacing portions are by extending II upper surfaces of bending board 3-5 and constitute.

The following steps can also be carried out: when the collision bending plates 3-14 are bent and formed, the circular arcs of the upper surface II formed by the collision bending plates 3-14 and the extension II bending plates 3-5 and the circular arcs of the lower surface I formed by the extension I bending plates 3-4 are concentric and congruent, and the bending plates 3-15 with the I limiting bending plates are bent and formed

When the first limiting bending plate 3-15 and the first arc of the lower surface formed by the first extending bending plate 3-4 are used, the end part collision part is respectively formed by the first arc of the lower surface and the second arc of the upper surface.

Referring to fig. 14, the scissors foot supports 1-3 supported with each other are in limit fit with the key limit end faces 1-6 of the keycap 1-1 through the scissors limit stops 3-3, and when the keycap 1-1 is at the upper limit position, the cantilever ends of the scissors limit stops 3-3 enter the space above the key elastic arms 1-7 of the cantilevers to reliably prevent the keys from coming off or limit the keycap 1-1 at the upper limit position.

Referring to fig. 16-19, key cap 1-1 is in the lower extreme position (key cap 1-1 is in the lowest position).

Referring to fig. 10-19, the lower connecting part of the scissors is in sliding fit with the connecting part of the supporting plate 5-1, the acting force of the tension spring 6-1 is applied to the elastic shearing hook 3-12 of the two scissor supports 1-3, the acting force of the tension spring 6-1 or the component force of the acting force of the tension spring 6-1 is along the x direction and points to the inner side of the key device, and under the action of the elastic force of the tension spring 6-1, the end part of the two scissor supports 1-3 is butted to ensure that the end parts of the two scissor supports 1

Keeping mutual contact and pressing;

under the action of external force, when the keycap 1-1 overcomes the component force generated by the tension spring 6-1 and upwards along the Z direction and moves downwards along the Z direction, the end part collision parts of the two scissor leg supports 1-3 are always kept in mutual contact pressure, and the force transmission between the two scissor leg supports 1-3 is formed; the component force generated by the tension spring 6-1 in the Z direction is reduced along with the reduction of the angle a and the angle b; the upward component force in the Z direction generated by the tension spring 6-1 is reduced to about 10g (see fig. 21) from 62g at the upper limit position, the upward component force F1 in the Z direction of the tension spring and the downward displacement L of the key cap are shown in the sections a to b, the point a is when the key cap 1-1 is at the upper limit position), after the tension spring 6-1 descends for a certain position, the elastic shear blade 3-10 starts to contact with the membrane switch circuit 4-1, the key cap continues to descend, and the upward force generated by the elastic shear blade 3-10 in the Z direction is gradually increased (see fig. 20, the sections b to c, and the point c is when the key cap 1-1 is at the lower limit position).

The restoring element in the prior art is a rubber elastic ring 2-1, the force and displacement relation diagram of the rubber elastic ring 2-1 is shown in figure 6, when the rubber elastic ring 2-1 is pressed from an upper limit position to a lower limit position, the elastic force is about 65g to about 30g at the maximum; the component force in the Z direction generated by the tension spring 6-1 is reduced to about 10g (see FIG. 20) from 62g at the upper limit position

Comparing fig. 6 and fig. 20, it can be easily seen that: the hand feeling is obviously better by adopting the technical scheme of the first restoring body acting on the scissor foot supports 1-3;

the two scissor supports 1-3 which are in interference fit with each other have the same structure and size, and the two scissor supports 1-3 which are in interference fit with each other are produced in the same pair of dies in order to ensure the precision; the first reset body acts on the scissor leg supports 1-3, and the end part collision parts of the scissor leg supports 1-3 are driven to be always kept in contact by the action force of the first reset body in the lifting process of the keycap, so that the parallelism of the keycap in the lifting process is better, and the influence of the processing precision of the end part collision parts on the parallelism of the keycap in the lifting process is eliminated;

the first reset body acts on the scissor-foot supports 1-3, the two scissor-foot supports 1-3 and the supporting plate 5-1 can be in sliding connection (the two scissor-foot supports 1-3 can also be in rotating connection and sliding connection with the supporting plate 5-1, but the best sliding connection is adopted), and the processing precision of the connecting parts of the scissor-foot supports 1-3 and the processing precision of the connecting parts of the supporting plate 5-1 have smaller influence on the parallelism of the keycap;

the first reset body adopts a tension spring, an annular steel wire 8-1, an annular rubber band 7-1 and a steel wire 34, further realizes the low height of the key device and obtains good hand feeling.

Referring to fig. 21, the first reset body adopts a ring-shaped rubber band 7-1 (the membrane switch circuit 4-1 is not shown in the figure).

Referring to fig. 22, the first reset body adopts an annular steel wire 8-1, the connecting part of the supporting plate 5-1 consists of two independent bending parts, the two independent bending parts consist of an x supporting plate and a vertical plate 5-9, and a y supporting plate and a transverse plate 5-10, a matching space is formed between the upper plate surface of the supporting plate 5-1 and the lower plate surface of the y supporting plate and the transverse plate 5-10, the opening of the matching space points to the inside, the lower connecting part of the scissors consists of a cut-off arc 3-13 and a cut-on arc 3-16, wherein the cut-off arc 3-13 and the cut-on arc 3-16 are in the same circle

A core; the upper surface of the upper shearing matched arc 3-16 is in sliding fit with the lower plate surface of the y support plate matched transverse plate 5-10, and the lower shearing matched arc 3-13 is in sliding fit with the upper plate surface of the support plate 5-1.

Referring to fig. 23-27, the scissors retaining part is composed of scissors extending retaining plates 3-18, and the support plate retaining part is composed of end surface support plate retaining end surfaces 5-12 of support plate retaining holes 3-11 penetrating through the plate surface of the support plate 5-1; when the key cap 1-1 is in the upper limit position, the end part of the cantilever end of the scissors extending anti-drop plate 3-18 is positioned in the support plate anti-drop hole 3-11.

When a key cap 1-1 of the key device is at an upper limit position, and an external force pulls the key cap upwards, the scissors anti-falling parts are in limit matching with the support plate anti-falling parts to prevent the scissors foot supports 1-3 from falling off from the connecting part of the support plate 5-1, the scissors anti-falling parts are formed by scissors extending anti-falling plates 3-18, and the support plate anti-falling parts are formed by the end surfaces of support plate anti-falling holes 3-11 penetrating through the surface of the support plate 5-1;

it should be ensured that: when the keycap 1-1 is at the upper limit position, the end part of the cantilever end of the scissors extending anti-drop plate 3-18 is positioned in the support plate anti-drop hole 3-11;

it should be ensured that: the keycap 1-1 is at the upper limit position, and when the keycap is pulled upwards by external force, the end part of the cantilever end of the scissors extending anti-falling plate 3-18 does not exceed the lower plate surface of the support plate 5-1;

it should be ensured that: the keycap 1-1 is at the lower limit position, and the end part of the cantilever end of the scissors extending anti-drop plate 3-18 does not interfere with the upper plate surface of the supporting plate 5-1.

Referring to fig. 28, the first restoring body adopts a compression spring 9-1, and the compression spring 9-1 obliquely acts on the lower parts of the keycap 1-1 and the scissor-foot supports 1-3.

Referring to fig. 29 and 30, the first restoring body adopts a steel wire 10-1, two ends of the steel wire 10-1 are respectively and rotatably connected with the supporting plate 5-1, and a convex part 10-2 near the middle part of the steel wire 10-1 is rotatably connected with a shearing elastic hook 3-12 of the scissor support 1-3.

Referring to fig. 31 and 32, the first restoring body is a magnetic material 11-1 arranged between the two scissor supports 1-3 or a magnetic material 11-1 respectively arranged between the two scissor supports 1-3 and the supporting plate 5-1.

Referring to fig. 33 and 34, the force of the first restoring body acts in the x direction near the joint of the scissor-foot supports 1-3.

The scissor foot supports 1-3 can also be produced by injection molding (the scissor foot supports 1-3 produced by sheet metal are adopted in the embodiment).

Referring to fig. 35-44, the scissor leg supports 1-3 of the key device are provided with scissor conflict extension plates 3-7, the end conflict is located at the cantilever end of the scissor conflict extension plates 3-7, wherein the scissor conflict extension plates 3-7 of the two scissor leg supports 1-3 are connected by a scissor conflict connector.

The contact part connector is composed of a contact connector 12-1, the contact connector 12-1 is composed of an elastic body or a flexible body or a ring metal, the elastic body is composed of a sheet-shaped elastic body, and the flexible body is composed of a sheet-shaped flexible body; the sheet elastic body is composed of a sheet metal elastic sheet, and the sheet flexible body is composed of flexible fiber cloth, a film, a rubber sheet and the like.

Referring to fig. 35, 36, 37, 38, the extension plates 3-7 of the interference shearing part are in a flat plate shape, and the interference part at the end part is positioned in the interference position

The end of the cantilever end of the contact extension plate 3-7 (in this embodiment, the end collision part is located at the corner of the cantilever end of the shear collision extension plate 3-7), the shear collision extension plates 3-7 of the two shear leg supports 1-3 are connected by the shear collision connector, and in this embodiment, the shear collision extension plates 3-7 of the two shear leg supports 1-3 are bonded or welded (preferably bonded) by the shear collision connector.

Referring to fig. 39-43, the interference part cut extending plate 3-7 is bent upwards to form an interference part extending plate 3-20, when the included angle C between the interference part extending plate 3-20 and the interference part cut extending plate 3-7 is greater than or equal to 90 degrees, the end interference part is located at the end of the cantilever end of the interference part extending plate 3-20 (in this embodiment, the end interference part is located at the corner of the cantilever end of the interference part extending plate 3-20), and the interference part extending plates 3-20 of the two scissor-leg supports 1-3 are connected by an interference part connector.

When the included angle C between the extending plates 3-20 of the abutting part and the extending plates 3-7 of the shearing abutting part is 0-89.99 degrees, the abutting part at the end part is positioned on the arc surface formed when the extending plates 3-20 of the bending abutting part are bent or the surface formed when the extending plates 3-20 of the abutting part are bent, and the extending plates 3-7 of the shearing abutting part of the two shear foot supports 1-3 are connected through an abutting part connector (not shown in the scheme).

Referring to fig. 44, the extension plates 3-7 of the interference parts of the scissors are punched and bent to form an upper matching arc 3-16 and an upper matching folding plate 3-21, wherein the upper matching arc 3-16 is slidably fitted with the lower plate surface of the support plate matching transverse plate 5-8, the interference parts of the end parts are formed by cantilever ends of the upper matching folding plates 3-21 (in the embodiment, the interference parts of the end parts are formed by corners of the cantilever ends of the upper matching folding plates 3-21), and the upper matching folding plates 3-21 of the two scissors foot supports 1-3 are bonded or welded (preferably bonded) through an interference part connecting body.

A through hole can be formed near the end of the cantilever end of the shear-collision-part extending plate 3-7, the end collision part of the two shear-leg supports 1-3 is located at the end of the cantilever end of the shear-collision-part extending plate 3-7, and the annular metal penetrates through the through hole of the cantilever end of the two shear-collision-part extending plates 3-7 to connect the two shear-leg supports 1-3 (not shown in the scheme).

The two scissor supports 1-3 which are in interference fit with each other have the same structure and size, and the two scissor supports 1-3 which are in interference fit with each other are produced in the same pair of dies in order to ensure the precision; under the action of the contact part connecting body, the end contact parts of the scissor supports 1-3 of the keycap are always kept in contact in the lifting process, so that the parallelism of the keycap in the lifting process is better, and the influence of the processing precision of the end contact parts on the parallelism of the keycap in the lifting process is eliminated;

the interference part connecting body is used for connecting the two scissor supports 1-3, the two scissor supports 1-3 and the supporting plate 5-1 are in sliding connection, and the processing precision of the connecting part of the scissor supports 1-3 and the processing precision of the connecting part of the supporting plate 5-1 have small influence on the parallelism of the keycap;

the connector of the interference part is adopted to connect the two scissor supports 1-3, so that the low height of the key device is further realized;

the end part collision part structure of the scissor leg supports 1-3 is greatly simplified by adopting the flaky collision part connecting body to connect the scissor leg supports 1-3.

Example 2

Referring to fig. 45 to 59, a key device using thin scissors support and a method for mounting a scissor support and a key cap thereof, comprising a key cap, a reset body, a switch circuit, and a scissor support, wherein the scissor support is respectively connected with the key cap and a support plate, and forms a synchronous linkage support structure through the transmission of mutual force to ensure that the key cap moves up and down parallel to the support plate; the restoring body is composed of a first restoring body, the first restoring body is provided with two connecting parts, one connecting part of the first restoring body is connected with the connecting part of one scissor-leg support 1-3, and the other connecting part of the first restoring body is connected with the connecting part of the other scissor-leg support 1-3; the connecting part of the first restoring body consists of a first convex sliding part and a second sliding part, and the first convex sliding part and the second sliding part form a distance L and are connected together; the connecting part of the scissor leg supports 1-3 consists of a scissor limiting part and scissor inclined planes 3-19, the scissor limiting part is parallel to the scissor leg supports 1-3, and the scissor inclined planes 3-19 and the scissor leg supports 1-3 form a certain included angle a; the second sliding part is in sliding fit with the shear limiting part, the first convex sliding part is in sliding fit with the shear inclined planes 3-19, and the first convex sliding part is pressed on the shear inclined planes 3-19 under the action of elastic force; the keycap of the key device overcomes the elastic force of the first restoring body under the action of external force, and when the keycap moves from the upper limit position to the lower limit position, the elastic force of the first restoring body is basically unchanged or gradually reduced.

The scissor foot support 3-1 is formed by stamping a metal plate in the embodiment, the scissor foot support 3-1 can also be formed by plastic injection molding, the resetting body is composed of a first resetting body and a second resetting body, and the first resetting body is composed of a steel wire and an elastic body.

The first convex sliding part is positioned outside the second sliding part and is parallel to the second sliding part.

The key cap of the key device overcomes the elastic force of the first restoring body under the action of external force, when the key cap moves from the upper limit position to the lower limit position, the first convex sliding part moves upwards or downwards and inwards along the plate surface of the scissor inclined plane 3-19, the second sliding part is limited by the scissor limiting part and moves downwards along the plate surface of the scissor foot support 1-3 or the plate surface parallel to the plate surface of the scissor foot support 1-3, and the elastic force of the first restoring body is basically unchanged or gradually reduced.

A complex limiting space is arranged below the shear limiting part, and the second sliding part is limited to move in the complex limiting space.

A complex limiting space is arranged between the shear limiting part and the shear foot supports 1-3, and the second sliding part is limited to move in the complex limiting space.

Referring to fig. 45, the first restoring body is formed by a ring-shaped steel wire 8-1 (used in the embodiment), the first convex sliding portion is formed by a convex steel wire section 8-3, the second sliding portion is formed by a y-shaped steel wire section 8-2, the convex steel wire 8-3 is smoothly connected with the y-shaped steel wire section 8-2 into a whole, the convex steel wire section 8-3 is positioned between the two y-shaped steel wire sections 8-2, and the ring-shaped steel wire 8-1 can also be in a non-closed shape, i.e., the lower part of the dotted line in the figure is completely removed, but the ring-shaped steel wire with a symmetrical structure is optimal.

Referring to fig. 47, the connecting part of the scissor leg supports 1-3 comprises a scissor limiting part and scissor inclined planes 3-19, the scissor limiting part comprises horizontal bending edges 3-21 parallel to the scissor leg supports 1-3, a complex limiting space is arranged below the horizontal bending edges 3-21 and is positioned between the lower plate surface of the horizontal bending edges 3-21 and the upper plate surface of the scissor leg supports 1-3 (adopted in the embodiment), the connecting part of the scissor leg supports 1-3 comprises 2 horizontal bending edges 3-21 and 1 scissor inclined plane 3-19, and the scissor inclined planes 3-19 and the horizontal bending edges 3-21 are arranged along the y direction

Arranging the horizontal bending edges 3-19 in a vertical direction, wherein the shear inclined planes 3-19 are positioned between the two horizontal bending edges 3-21, the openings of the complex limiting spaces of the horizontal bending edges 3-21 point to the positive x direction, the shear inclined planes 3-19 are connected with the shear lower bending edges 3-20, the extension plates are bent downwards to form the shear lower bending edges 3-20, the extension plates are bent along the negative x direction and the positive Z direction to form the shear inclined planes 3-19, the horizontal bending edges 3-21 are connected through the Z bending edges 3-23, and the horizontal bending edges 3-21 of the cantilever point to the positive x direction;

the scissors anti-drop part is composed of scissors extending anti-drop plates 3-18, and the support plate anti-drop part is composed of the end surfaces of support plate anti-drop holes 3-11 penetrating through the plate surface of the support plate 5-1; when the key cap 1-1 is in the upper limit position, the end part of the cantilever end of the scissors extending anti-drop plate 3-18 is positioned in the support plate anti-drop hole 3-11. The scissors extending anti-drop plates 3-18 (scissors anti-drop parts) on the scissors foot supports 1-3 are provided with notches formed by blanking, and the end faces of the notches parallel to the cantilever end faces of the scissors extending anti-drop plates 3-18 form anti-rotation limiting faces 3-24.

See fig. 47-50, to ensure: the distance between the anti-rotation limiting surface 3-24 and the cantilever end face of the scissors extension anti-drop plate 3-18 is less than or equal to the thickness of the supporting plate 5-1, or the distance between the anti-rotation limiting surface 3-24 and the cantilever end face of the scissors extension anti-drop plate 3-18 needs to be ensured: when the keycap 1-1 bears upward drawing force or the scissor support 1-3 is installed, the contact part of the scissor support 1-3 and the cantilever end face of the scissor extension anti-falling plate 3-18 cannot exceed the lower plate surface of the support plate 5-1 (when the contact part exceeds, the seal film bonded with the lower plate surface of the support plate 5-1 is damaged); the scissor supports 1-3 are composed of scissor supports 1-3 with the ends mutually butted, the scissor supports 1-3 can also adopt the scissor supports with the middle mutually butted, (but the scissor supports 1-3 with the ends mutually butted are preferred).

Referring to fig. 48-49, the second restoring body is composed of a small rubber body 13-1, which is arranged outside the scissor-foot supports 1-3, and the present embodiment adopts: two small rubber bodies are arranged on the outer sides of the scissor supports 1-3 along the x direction; the scissor foot supports 1-3 are positioned in the through holes of the membrane switch circuit 4-1 (the membrane switch circuit 4-1 surrounds the outer side of the connecting part of the scissor foot supports 1-3 and the supporting plate 5-1), and the x steel wire section 8-4 of the annular steel wire 8-1 is positioned on the outer side of the connecting part of the supporting plate 5-1.

Referring to fig. 50, the second restoring body is composed of a restoring elastic sheet connected with the key holder 1-5, the restoring elastic sheet is composed of a key arm elastic sheet 14-1, one end of the key arm elastic sheet 14-1 extends downwards from the other end of the key holder 1-5, in this embodiment, 4 key arm elastic sheets 14-1 are adopted, one end of 1 of the 4 key arm elastic sheets 14-1 is connected with the vicinity of the middle part of the key holder 1-5, and the other end of 1 of the 4 key arm elastic sheets 14-1 extends downwards towards two sides of the middle part of the key holder 1-5 respectively; it is also possible to: one end 1 of the 4 key arm spring pieces 14-1 is connected with the vicinity of the upper and lower sides of the key support 1-5, and the other end 1 of the 4 key arm spring pieces 14-1 extends downwards towards the middle part of the key support 1-5 respectively (not shown in the figure)

The key arm elastic sheet 14-1 can also be riveted or bonded with the middle part of the key support 1-5; the key arm spring 14-1 can also be riveted or bonded with the plate surfaces near the two ends of the key support 1-5.

Referring to fig. 47 and 54, the shear inclined planes 3-19 are formed by the shear inclined planes 3-19 forming a certain included angle a with the horizontal bent edges 3-21, and the shear inclined planes 3-19 extend from bottom to top and inwards.

Referring to FIG. 48-FIG. 57, the circular steel wire 8-1 is parallel to the supporting plate 5-1, and the scissor slant 3-19 is integrated with the scissor leg support 1-3

The included angle a is determined, and the included angle a is ensured to be as follows: under the action of external force, a keycap of the key device overcomes the elasticity of the annular steel wire 8-1, when the keycap moves from an upper limit position to a lower limit position, the convex steel wire section 8-3 moves upwards and inwards along the plate surface of the shear slope 3-19, the y steel wire section 8-2 is limited by the horizontal bending edge 3-21 and moves downwards along the upper plate surface of the scissor foot support 1-3 or the plate surface parallel to the plate surface of the scissor foot support 1-3, and the elasticity of the annular steel wire 8-1 is basically unchanged or the elasticity of the annular steel wire 8-1 is gradually reduced.

Referring to fig. 58-59, the shear inclined planes 3-19 are formed by the shear inclined planes 3-19 forming a certain included angle a with the horizontal bending edges 3-21, and the shear inclined planes 3-19 extend from top to bottom and inwards.

The annular steel wire 8-1 is parallel to the supporting plate 5-1, the shear inclined plane 3-19 and the shear foot support 1-3 form a certain included angle a, and the included angle a is ensured as follows: under the action of external force, a keycap of the key device overcomes the elasticity of the annular steel wire 8-1, when the keycap moves from an upper limit position to a lower limit position, the convex steel wire section 8-3 moves upwards and inwards along the plate surface of the shear slope 3-19, the y steel wire section 8-2 is limited by the horizontal bending edge 3-21 and moves downwards along the upper plate surface of the scissor foot support 1-3 or the plate surface parallel to the plate surface of the scissor foot support 1-3, and the elasticity of the annular steel wire 8-1 is basically unchanged or the elasticity of the annular steel wire 8-1 is gradually reduced.

Referring to fig. 60, shear ramps 3-19 extend in the x-direction and upwardly, and the space between shear ramps 3-19 and scissor ii planes 3-27 of scissor leg supports 1-3 can accommodate male wire segments 8-3.

Referring to fig. 60-62, the scissor-foot supports 1-3 are formed into scissor I planes 3-26 and scissor II planes 3-27, the upper scissor connecting parts are located on the scissor I planes 3-26, the scissor limiting parts are located on the scissor II planes 3-27, the second sliding parts are in sliding fit with the scissor II planes 3-27, the scissor I planes 3-26 are located above the scissor II planes 3-27, and the second sliding parts are formed by y steel wire sections 8-2.

Mounting through holes 3-25 penetrating through the plate surface are formed below the upper scissors connecting parts of the scissors foot supports 1-3 along the x direction.

The scissor feet support 1-3 and are provided with restoring body limiters 3-28 formed on the left and right sides along the y direction.

Through holes penetrating through the plate surface are formed near the middle part of the support plate and near the middle part of the switch loop, and transparent convex lenses 15-1 protruding upwards are arranged in the through holes. A limiting part of the scissors,

Otherwise, the procedure was as in example 1.

Example 3

Referring to fig. 63-65, the device comprises a key cap, a reset body, a switch circuit, and a scissor-foot support, wherein the scissor-foot support is connected with the key cap and the support plate respectively; one end of the scissor leg support 1-3 is provided with an end part abutting part, a scissor lower connecting part is arranged between the other end of the scissor leg support 1-3 and the end part abutting part, and the scissor lower connecting part is closer to the end part abutting part;

when the keycap 1-1 moves up and down between the upper limit position and the lower limit position, the end part abutting parts of the two scissor leg supports 1-3 are always kept in mutual contact pressure, so that the force transmission between the two scissor leg supports 1-3 is formed, and a synchronous linkage supporting structure is formed, so that the keycap is ensured to move up and down parallel to the supporting plate;

when the key device is in a natural state, the key cap 1-1 is at an upper limit position, and the scissor-foot supports 1-3 are opposite to the supporting plate

The included angle of the supporting plate 5-1 is an angle a and an angle b, and the openings of the matching space of the supporting plate 5-1 point to the outer side; the angle a = the angle b, when the keycap 1-1 bears upward force and the included angle of the scissor support 1-3 relative to the support plate 5-1 is larger than the angle a, the scissor rotation preventing plate 3-29 is attached to the upper plate surface of the support plate 5-1, and the lower end structures of the two scissor supports 1-3 are prevented from exceeding the lower plate surface of the support plate 5-1;

the lower connecting part of the scissors is composed of a lower shearing matched arc 3-13 and an upper shearing matched arc 3-16, wherein the lower shearing matched arc 3-13 is concentric with the upper shearing matched arc 3-16; the scissors rotation-resisting plate 3-29 is formed by punching the lower arc 3-13 of the scissors (the scissors rotation-resisting plate 3-29 is an extension plate for cutting the lower arc 3-13);

when the two scissor supports 1-3 are respectively positioned at an angle theta 1 and an angle theta 2, the lower end structures of the two scissor supports 1-3 are aligned with the lower surface of the key device, wherein a = b.

When the two scissor support legs 1-3 are respectively positioned at an angle theta 1 and an angle theta 2, the lower end structures of the two scissor support legs 1-3 do not exceed the lower plate surface of the support plate 5-1.

A support plate guide plate 5-11 for guiding the scissor supports 1-3 is also arranged on the support plate 5-1;

rotating the key device by 180 degrees, namely, the support plate 5-1 becomes the keycap 1-1, and the keycap 1-1 becomes the support plate 5-1; namely, the key cap 1-1 (the main structure of the connecting part of the key cap 1-1 is kept unchanged) and the support plate 5-1 (the main structure of the connecting part of the support plate 5-1 is kept unchanged) are interchanged, so that the scissor-foot supports 1-3 are arranged in a V shape or the scissor-foot supports 1-3 are arranged in an eight shape, and the effects can be equally realized: when the key device is in a natural state, the key cap 1-1 is in an upper limit position, the included angles of the scissor foot supports 1-3 relative to the upper limit angle of the key cap 1-1 are an angle a and an angle b, and the openings of the matching spaces of the key cap 1-1 point to the outside (not shown in the figure).

Referring to fig. 65-70, the scissor-foot support mounting method of a key device comprises the following steps:

respectively or simultaneously aligning the lower connecting parts of the scissors of the two scissors foot supports 1-3 with the matching space opening of the supporting plate 5-1 or the matching space opening of the keycap 1-1; respectively or simultaneously placing the two scissor leg supports 1-3 in an angle range theta 1 and an angle range theta 2; pushing the scissor supports 1-3 inwards respectively or simultaneously, wherein the scissor supports 1-3 gradually enter the matching space of the support plate 5-1 from the matching space opening of the support plate 5-1, or the scissor supports 1-3 gradually enter the matching space of the keycap 1-1 from the matching space opening of the keycap 1-1, wherein theta 1= a +. DELTA.degrees, theta 2= b +. DELTA.degrees, and delta = 0-2 degrees; the two scissor foot supports 1-3 are in a standing shape, and the lower connecting parts of the two scissor foot supports 1-3 are respectively or simultaneously aligned with the matching space opening of the supporting plate 5-1 or the matching space opening of the keycap 1-1; respectively or simultaneously outwards rotating the two scissor leg supports 1-3 to enable the two scissor leg supports 1-3 to be arranged in a theta 1 angle range and a theta 2 angle range; the scissor supports 1-3 are pushed inwards, the scissor supports 1-3 gradually enter the matching space of the supporting plate 5-1 from the matching space opening of the supporting plate 5-1, or the scissor supports 1-3 gradually enter the matching space of the keycap 1-1 from the matching space opening of the keycap 1-1.

Referring to fig. 66, the scissors lower connecting parts of the two scissors foot supports 1-3 are respectively or simultaneously aligned with the matching space opening positions of the supporting plate 5-1; the two scissor leg supports 1-3 are in a standing shape, the supporting plate 5-1 is in a horizontal shape, the two scissor leg supports 1-3 move downwards until the outer side structure of the end part abutting part of the scissor leg supports 1-3 is contacted with the supporting plate 5-1 or a switch loop, and meanwhile, the two scissor leg supports 1-3 are limited by the supporting plate guide plate 5-11 to have the degree of freedom vertical to the paper surface;

turning the two scissor-foot supports 1-3 outward, either separately or simultaneously, with reference to fig. 67-68, places the two scissor-foot supports 1-3 in position

Within the range of theta 1 and within the range of theta 2;

referring to fig. 69-70, the scissor supports 1-3 are pushed inward, and the scissor supports 1-3 gradually enter the fitting space of the support plate 5-1 from the fitting space opening of the support plate 5-1.

Referring to fig. 71-74, the scissor-foot support mounting method of a key device comprises the following steps:

respectively or simultaneously aligning the lower connecting parts of the scissors of the two scissors foot supports 1-3 with the matching space opening of the supporting plate 5-1 or the matching space opening of the keycap 1-1, and simultaneously respectively or simultaneously placing the two scissors foot supports 1-3 in the angle range theta 1 and the angle range theta 2; pushing the scissor supports 1-3 inwards respectively or simultaneously, wherein the scissor supports 1-3 gradually enter the matching space of the support plate 5-1 from the matching space opening of the support plate 5-1, or the scissor supports 1-3 gradually enter the matching space of the keycap 1-1 from the matching space opening of the keycap 1-1, wherein theta 1= a +. DELTA.degrees, theta 2= b +. DELTA.degrees, and delta = 0-2 degrees; the scissor-foot supports 1-3 enter the matching space of the supporting plate 5-1 or the matching space of the keycap 1-1 without obstruction.

Referring to fig. 75 and 76, the device comprises a reset body, a switch circuit and a scissor-foot support, wherein the scissor-foot support is respectively connected with a keycap and a support plate; one end of the scissor leg support 1-3 is provided with an end part abutting part, a scissor lower connecting part is arranged between the other end of the scissor leg support 1-3 and the end part abutting part, and the scissor lower connecting part is closer to the end part abutting part;

θ 1 and θ 2, where θ 1= a +. DELTA.degrees, θ 2= b +. DELTA.degrees;

openings of the matching spaces of the keycaps 1-1 point to the inner sides;

the two scissor supports 1-3 are positioned in a middle through hole of the switch loop (namely, the two scissor supports 1-3 are connected with the supporting plate 5-1, and the switch loop surrounds the two scissor supports 1-3); the second restoring body is arranged around the two scissor-foot supports 1-3 and above the switch circuit.

Referring to fig. 75-82, the scissor-foot support mounting method of a key device comprises the following steps:

the keycap 1-1 and the support plate 5-1 form a certain inclination angle, and the lower surface of the keycap 1-1 at the lower end and one of the keycaps are inclined

The upper end parts of the scissor supports 1-3 are contacted, and the keycap 1-1 is pulled inwards, so that the key part of the keycap 1-1 at the end is extended to the edge 1-12 and enters the mounting through hole 3-25 of the scissor support 1-3;

and pressing the keycap 1-1 downwards to complete installation.

Referring to fig. 77 and 78, the key cap 1-1 is inclined to the support plate 5-1, wherein the left end of the inclined key cap 1-1 is located at the lower end;

referring to fig. 79, outside the scissor-foot support 1-3 on the right, the lower surface of the tilted keycap 1-1 at the lower end (on the right) is in contact with the upper end of the scissor-foot support 1-3 (on the right),

referring to fig. 80, a keycap 1-1 is pulled inwards, a scissors anti-falling structure crosses a key limiting structure, the scissors anti-falling structure is composed of scissors limiting blocks 3-3, the key limiting structure is composed of independently arranged key limiting end faces 1-6, and finally, a key part edge 1-12 of the keycap 1-1 at the end enters a mounting through hole 3-25 of a scissors foot support 1-3;

referring to fig. 81, the other end (left end) of the key cap 1-1 is rotated downward to make the connection part of the key cap 1-1 pass over the outer side of the upper end of the other scissor-leg support 1-3 until the lower surface of the key cap 1-1 contacts the upper end of the scissor-leg support 1-3, keeping the positions of the key partial extensions 1-12 and the mounting through holes 3-25 unchanged or keeping the positions of the key partial extensions 1-12 and the mounting through holes 3-25 unchanged;

or keeping the keycap 1-1 (on the right side) in contact with the scissor supports 1-3 on the right side, and rotating the other end (left end) of the keycap 1-1 downwards to enable the connecting part of the keycap 1-1 to cross the outer side of the upper end of the other scissor support 1-3 until the lower surface of the keycap 1-1 is in contact with the upper ends of the scissor supports 1-3;

referring to fig. 81 and 82, when the key cap 1-1 is pressed downwards or the key cap 1-1 is pulled downwards and rightwards and the combination thereof, the scissors anti-falling structure on the left side passes over the key limiting structure on the left side, and the key cap is installed.

Otherwise, the procedure was as in example 1.

In all the above embodiments, the key assembly can be rotated 180 degrees, i.e., the support plate 5-1 becomes the key cap 1-1, and the key cap 1-1 becomes the support plate 5-1; the key cap 1-1 (the main structure of the connecting part of the key cap 1-1 is kept unchanged) and the support plate 5-1 (the main structure of the connecting part of the support plate 5-1 is kept unchanged) are interchanged, so that the scissor-foot supports 1-3 are arranged in a V shape or the scissor-foot supports 1-3 are arranged in an eight shape, and the effects can be equally achieved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an adopt key device of slim scissors support, includes key cap, restoring body, switch return circuit, scissors foot support, and wherein, the scissors foot support is connected with key cap, backup pad respectively, and two scissors foot supports constitute synchronous linkage bearing structure through the transmission of power each other to ensure that the key cap is on a parallel with the backup pad and makes elevating movement, characterized by: an end part collision part is arranged at one end of the scissor foot support (3-1), the other end of the scissor foot support (3-1) is connected with the keycap or the support plate, a scissor lower connecting part connected with the support plate is arranged between the other end of the scissor foot support (3-1) and the end part collision part, and the scissor lower connecting part is closer to the end part collision part; the key cap (1-1) moves up and down between the upper limit position and the lower limit position and acts on the restoring body of the scissor foot supports (3-1) to enable the end part abutting parts of the two scissor foot supports (3-1) to be always in mutual contact and press, wherein one end of the restoring body is connected with one of the scissor foot supports (3-1), the other end of the restoring body is connected with the other scissor foot support (3-1) or the connected scissor foot supports (3-1) enable the end part abutting parts of the two scissor foot supports (3-1) to be always in mutual contact and press through the abutting part connecting body, so that force transmission between the two scissor foot supports (3-1) is formed, a synchronous linkage supporting structure is formed, and the key cap is enabled to be parallel to the supporting plate to do lifting movement.

2. The utility model provides an adopt key device that slim scissors supported, includes key cap, restoring body, switch return circuit, scissors foot support, and wherein, the scissors foot support is connected with key cap, backup pad respectively, and the scissors foot support constitutes synchronous linkage bearing structure through the transmission of power each other to ensure that the key cap is on a parallel with the backup pad and makes elevating movement, characterized by: the restoring body is composed of a first restoring body, the first restoring body is provided with two connecting parts, one connecting part of the first restoring body is connected with the connecting part of one scissor-leg support (3-1), and the other connecting part of the first restoring body is connected with the connecting part of the other scissor-leg support (3-1); the connecting part of the first restoring body consists of a first convex sliding part and a second sliding part, and the first convex sliding part and the second sliding part form a distance L and are connected together; the connecting part of the scissor leg support (3-1) is composed of a scissor inclined plane (3-19), and the scissor inclined plane (3-19) and the scissor leg support (3-1) form a certain included angle; wherein the second sliding part moves along the plane of the scissor foot support (3-1) or along a plane parallel to the plane of the scissor foot support (3-1), the first convex sliding part is in sliding fit with the shear slope (3-19), and the first convex sliding part is pressed on the shear slope (3-19) under the action of elastic force; the key cap of the key device overcomes the elastic force of the first restoring body under the action of external force, and when the key cap moves from the upper limit position to the lower limit position, the elastic force of the first restoring body keeps unchanged or gradually reduces.

3. A key device supported by thin scissors according to claim 1 or 2, wherein: the restoring body is composed of a first restoring body, the acting force of the first restoring body is exerted on two scissor leg supports (3-1), and the acting force of the first restoring body or the component force of the acting force of the first restoring body is along the x direction and points to the inner side of the key device; when the keycap (1-1) moves up and down along the Z direction, under the action of the first restoring body, the end part contact parts of the two scissor foot supports (3-1) are always in mutual contact pressure, and the force transmission between the two scissor foot supports (3-1) is formed.

4. A key assembly using thin scissors support as defined in claim 3, wherein: the restoring body consists of a first restoring body and a second restoring body, and when the keycap (1-1) overcomes the upward component force in the Z direction generated by the elastic force of the first restoring body and moves downwards along the Z direction under the action of external force, the upward component force in the Z direction generated by the elastic force of the first restoring body is reduced along with the descending of the keycap; after the second restoring body descends to a certain position from the keycap, the second restoring body starts to generate upward force along the Z direction.

5. A key assembly using thin scissors support as defined in claim 4, wherein: one end of the scissors foot support (3-1) is provided with an end part collision part, the other end of the scissors foot support (3-1) is provided with a scissors upper connecting part matched with the keycap, the first reset body is respectively connected with the two scissors foot supports (3-1) which are mutually collided, and the elastic force of the first reset body acts between the scissors upper connecting part and the end part collision part.

6. A key device supported by thin scissors according to claim 1, 2 or 5, wherein: the end parts of the two scissor supports (3-1) are mutually abutted, one end of the abutting part of the end parts of the two scissor supports (3-1) which are mutually abutted is provided with a scissor anti-falling part, when the key cap (1-1) of the key device is positioned at the upper limit position and an external force upwards pulls the key cap, the scissor anti-falling part is in limit fit, the scissor support (3-1) is prevented from being separated from the connecting part of the supporting plate (5-1) or the scissor anti-falling part is in limit fit with the supporting plate anti-falling part, and the scissor support (3-1) is prevented from being separated from the connecting part of the supporting plate (5-1).

7. A key assembly using thin scissors support as defined in claim 6, wherein: the scissors anti-falling part is composed of scissors extending anti-falling plates (3-18), and the support plate anti-falling part is composed of the end faces of support plate anti-falling holes (3-11) penetrating through the plate surface of the support plate (5-1); when the keycap (1-1) is at the upper limit position, the end of the cantilever end of the scissors extension anti-drop plate (3-18) is positioned in the support plate anti-drop hole (3-11).

8. A key assembly using thin scissors support as defined in claim 6, wherein: the scissors foot supports (3-1) are provided with an extension I bending plate (3-4) and an extension II bending plate (3-5), the extension plates (3-7) of the shearing collision parts are bent upwards respectively to form the extension I bending plate (3-4) and the extension II bending plate (3-5), the end collision part of one of the scissors foot supports (3-1) is positioned on the lower plate surface of the extension I bending plate (3-4), the end collision part of the other scissors foot support (3-1) is positioned near the cantilever end of the extension II bending plate (3-5), the scissors anti-falling part of one of the scissors foot supports (3-1) is formed by bending the plate surface of the cantilever end of the extension I bending plate (3-4) downwards to form a I limiting bending plate (3-15), and the scissors foot support (3-1) is positioned on the extension II bending plate (3-5) The above.

9. A key device supported by thin scissors according to claim 1, 4 or 5, wherein: the key device is characterized in that the scissor leg supports (3-1) are provided with scissor conflict part extending plates (3-7), the end conflict parts are positioned at cantilever ends of the scissor conflict part extending plates (3-7), wherein the scissor conflict part extending plates (3-7) of the two scissor leg supports (3-1) are connected through scissor conflict part connectors, the scissor conflict part connectors are flaky, one end of each scissor conflict part connector is connected with the scissor conflict part extending plate (3-7) of one scissor leg support (3-1), and the other end of each scissor conflict part extending plate (3-7) of the other scissor leg support (3-1) is connected with the scissor conflict part extending plate (3-7).

10. A key assembly supported by thin scissors as defined in claim 9, wherein: the shear conflict part extending plate (3-7) is flat, the end conflict part is located the shear conflict part extending plate (3-7) cantilever end or the shear conflict part extending plate (3-7) is upwards bent to form conflict part extending bending plate (3-20), the end conflict part is located the conflict part extending bending plate (3-20) cantilever end or the conflict part extending bending plate (3-20) arc surface.

11. A key device supported by thin scissors according to claim 1 or 10, wherein: the contact part connecting body is composed of an elastic body, a flexible body or annular metal, the elastic body is composed of a sheet-shaped elastic body, and the flexible body is composed of a sheet-shaped flexible body.

12. A key assembly using thin scissors support as defined in claim 2, wherein: the connecting part of the scissor foot supports (3-1) further comprises a scissor limiting part, and the scissor limiting part is parallel to the scissor foot supports (3-1).

13. A key device supported by thin scissors according to claim 2 or 12, wherein: the first convex sliding portion protrudes outward or inward from the second sliding portion, and the first convex sliding portion is parallel to the second sliding portion.

14. A key assembly supported by thin scissors as defined in claim 13, wherein: the key device further comprises a scissors limiting part and scissors upper connecting parts, the scissors foot supports (3-1) are formed into scissors I planes (3-26) and scissors II planes (3-27), the scissors upper connecting parts are located on the scissors I planes (3-26), the scissors limiting part is located on the scissors II planes (3-27), the second sliding part is in sliding fit with the scissors II planes (3-27), and the scissors I planes (3-26) are located on the scissors II planes (3-27).

15. A key assembly using thin scissors support as defined in claim 2, wherein: the scissors foot support (3-1) is further provided with an upper scissors connecting part, and an installation through hole (3-25) penetrating through the plate surface is formed below the upper scissors connecting part of the scissors foot support (3-1) along the x direction.

16. A key assembly using thin scissors support as defined in claim 2, wherein: and the pair of resetting position limiting bodies (3-28) are formed on the left side and the right side of the scissor foot support (3-1) along the y direction.

17. A key assembly using thin scissors support as defined in claim 2, wherein: through holes penetrating through the plate surface are formed near the middle part of the supporting plate and near the middle part of the switch loop, and transparent convex lenses (15-1) protruding upwards are arranged in the through holes.

18. A key device supported by thin scissors according to claim 2 or 12, wherein: the key device further comprises a shear limiting part, the keycap of the key device overcomes the elastic force of the first restoring body under the action of an external force, when the keycap moves from the upper limit position to the lower limit position, the first convex sliding part moves upwards or downwards and moves inwards along the shear inclined plane (3-19), the second sliding part is limited by the shear limiting part and moves upwards or downwards and moves inwards along the plate surface of the shear foot support (3-1) or the plate surface parallel to the shear foot support (3-1), and the elastic force of the first restoring body is unchanged or gradually reduced.

19. A key assembly using thin scissor supports as claimed in claim 12, wherein: a complex limiting space which is formed by the plate surface of the scissor foot support (3-1) in a penetrating mode is arranged below the scissor limiting portion, and the second sliding portion is limited to move in the complex limiting space.

20. The thin scissor-supported key device of claim 19, wherein: a complex limiting space which penetrates through the plate surface of the scissor leg support (3-1) is arranged between the scissor limiting part and the scissor leg support (3-1), and the second sliding part is limited to move in the complex limiting space.

21. A key assembly using thin scissor supports as claimed in claim 12, wherein: the connecting part of the scissor foot support (3-1) is composed of 2 scissor limiting parts and 1 scissor inclined plane (3-19), and the scissor inclined plane (3-19) is positioned between the scissor limiting parts.

22. A key device supported by thin scissors according to claim 2 or 12, wherein: the scissor foot support (3-1) is provided with two second sliding parts, and the first convex sliding part is positioned between the two second sliding parts.

23. A key assembly using thin scissors support as defined in claim 2, wherein: the linkage supporting structure of the key device is composed of scissor foot supports (3-1) with the ends mutually butted.

24. A key assembly using thin scissors support as defined in claim 2, wherein: the restoring body comprises a first restoring body and a second restoring body, wherein the first restoring body is parallel to the supporting plate: under the action of external force, when the keycap 1-1 overcomes the upward component force in the Z direction generated by the elastic force of the first restoring body and moves downwards along the Z direction, the upward component force in the Z direction generated by the elastic force of the first restoring body is reduced along with the descending of the keycap 1-1; after the second restoring body descends a certain position at the keycap, the second restoring body starts to generate upward force along the Z direction, and pushes the key device to reset upwards.

25. A key assembly using thin scissors support as defined in claim 2, wherein: the key device also comprises a scissors limiting part, and an opening of a complex limiting space formed by the plate surfaces of the scissors foot supports (3-1) points to the positive x direction.

26. A key assembly using thin scissors support as defined in claim 2, wherein: the first restoring body is composed of a steel wire and an elastic body.

27. A key assembly using thin scissors support as defined in claim 2, wherein: the first restoring body is composed of an annular steel wire.

28. A key assembly using thin scissors support as defined in claim 2, wherein: the first restoring body is composed of a tension spring.

29. A method for installing scissor supports of a key device comprises a key cap, a reset body, a switch loop and scissor supports, wherein the scissor supports are respectively connected with the key cap and a support plate, and the two scissor supports form a synchronous linkage support structure through mutual force transmission so as to ensure that the key cap moves up and down parallel to the support plate; the scissor-leg support mounting method of the key device comprises the following steps: respectively or simultaneously aligning the scissors lower connecting parts of the two scissors foot supports (3-1) with the matching space opening of the supporting plate (5-1) or the matching space opening of the keycap (1-1); respectively or simultaneously placing the two scissor leg supports (3-1) in a theta 1 angle range and a theta 2 angle range; the scissor supports (3-1) are pushed inwards respectively or simultaneously, the scissor supports (3-1) gradually enter the matching space of the supporting plate (5-1) from the matching space opening of the supporting plate (5-1), or the scissor supports (3-1) gradually enter the matching space of the keycap (1-1) from the matching space opening of the keycap (1-1), wherein the keycap (1-1) is at an upper limit position, the two scissor supports (3-1) are respectively at an angle a and an angle b relative to the supporting plate (5-1) or respectively relative to the upper limit angle of the keycap (1-1), the angle theta 1 and the angle theta 2 are respectively the angles of the two scissor supports (3-1) relative to the supporting plate (5-1) or respectively relative to the keycap (1-1), when the device is installed, the angle theta 1 is between the angle a and 90 degrees, and the angle theta 2 is between the angle b and 90 degrees.

30. A method of mounting a scissor support for a key assembly according to claim 29, wherein: the device comprises a keycap, a reset body, a switch loop and a scissor support, wherein the scissor support is respectively connected with the keycap and a support plate; an end part abutting part is arranged at one end of the scissor foot support (3-1), a scissor lower connecting part is arranged between the other end of the scissor foot support (3-1) and the end part abutting part, and the scissor lower connecting part is closer to the end part abutting part; when the keycap (1-1) moves up and down between the upper limit position and the lower limit position, the end part contact parts of the two scissor leg supports (3-1) are always in mutual contact pressure, so that the force transmission between the two scissor leg supports (3-1) is formed, and a synchronous linkage supporting structure is formed, so that the keycap is ensured to move up and down parallel to the supporting plate; when the key device is in a natural state, the key cap (1-1) of the key device is in an upper limit position, the upper limit angles of the scissor support (3-1) relative to the support plate (5-1) or relative to the key cap (1-1) are respectively an angle a and an angle b, and the matching space opening of the support plate (5-1) or the matching space opening of the key cap (1-1) point to the outside.

31. A method of mounting a scissor support for a key assembly according to claim 29, wherein: the two scissor foot supports (3-1) are in a standing shape, and the lower scissor connecting parts of the two scissor foot supports (3-1) are respectively or simultaneously aligned with the matching space opening of the supporting plate (5-1) or the matching space opening of the keycap (1-1); respectively or simultaneously outwards rotating the two scissor leg supports (3-1) to enable the two scissor leg supports (3-1) to be positioned in a theta 1 angle range and a theta 2 angle range; the scissor supports (3-1) are pushed inwards, the scissor supports (3-1) gradually enter the matching space of the supporting plate (5-1) from the matching space opening of the supporting plate (5-1), or the scissor supports (3-1) gradually enter the matching space of the keycap (1-1) from the matching space opening of the keycap (1-1).

32. A method of mounting a scissor support for a key assembly according to claim 29, wherein: when the two scissor supports (3-1) are respectively positioned at an angle theta 1 and an angle theta 2, the lower end structures of the two scissor supports (3-1) are aligned with the lower surface of the key device, wherein a is equal to b.

33. A method of mounting a scissor support for a key assembly according to claim 29, wherein: when the two scissor leg supports (3-1) are respectively positioned at an angle theta 1 and an angle theta 2, the lower end structures of the two scissor leg supports (3-1) do not exceed the lower plate surface of the support plate (5-1).

34. A method of mounting a scissor support for a key assembly according to claim 29, wherein: the scissor foot supports (3-1) enter the matching space of the supporting plate (5-1) or the matching space of the keycap (1-1) without obstruction.

35. A key cap mounting method of a key device is characterized in that: the key device comprises a key cap, a reset body, a switch loop and scissor foot supports, wherein the scissor foot supports are respectively connected with the key cap and the supporting plate, and the two scissor foot supports form a synchronous linkage supporting structure through the transmission of force between the two scissor foot supports so as to ensure that the key cap moves up and down parallel to the supporting plate;

the key cap mounting method of the key device comprises the following steps: the key cap (1-1) and the support plate (5-1) form a certain inclination angle, the lower surface of the inclined key cap (1-1) at the low end is contacted with the upper end part of one scissor support (3-1), the key cap (1-1) is pulled inwards, the scissor anti-falling structure crosses the key limiting structure, the key local extending edge (1-12) of the key cap (1-1) at the end enters the mounting through hole (3-25) of the scissor support (3-1); keeping the positions of the key local extending edges (1-12) and the mounting through holes (3-25) unchanged or keeping the positions of the key local extending edges (1-12) and the mounting through holes (3-25) unchanged, and downwards rotating the other end of the keycap (1-1) to enable the connecting part of the keycap (1-1) to cross the outer side of the upper end of the other scissor support (3-1) until the lower surface of the keycap (1-1) is contacted with the upper end of the scissor support (3-1); the key cap (1-1) is pressed downwards or the key cap (1-1) and the combination thereof are pulled downwards and rightwards, the scissors anti-falling structure on the left side crosses the key limiting structure on the left side, and the key cap is installed.