WO2016161855A1

WO2016161855A1 - Key switch device for sheet metal scissor support having elastic hook limit structure

Info

Publication number: WO2016161855A1
Application number: PCT/CN2016/074773
Authority: WO
Inventors: 陈�峰
Original assignee: 陈�峰
Priority date: 2015-04-05
Filing date: 2016-02-28
Publication date: 2016-10-13

Abstract

A key switch device for a sheet metal scissor support having a cantilever elastic hook limit structure comprises a keycap (1), a reset element (11), a switch circuit (12) having a switch, a supporting plate (15) having a fitting portion, and scissor supports (16) having an upper fitting portion and a lower fitting portion. The scissor supports (16) are rotatably or slidably connected to the keycap (1) and the fitting portion of the supporting plate (15) respectively by means of the upper fitting portion and the lower fitting portion. The scissor supports (16) form a synchronously-linked supporting structure by means of transfer of force therebetween, so as to ensure that the keycap (1) makes up-and-down movement in a way of being parallel to the supporting plate (15), and the scissor supports (16) are formed on a metal plate by means of stamping. Each scissor support (16) is provided with a sheet metal elastic cantilever (20) having elasticity. The scissor support (16) is provided with a stamped scissor separation prevention structure. A key limit boss (37) is disposed on the keycap (1). The mutually supporting scissor supports (16) are fitted to the key limit boss (37) of the keycap (1) in a limited manner by means of the scissor separation prevention structure, so as to prevent a key from being separated or limit the keycap (1) on an upper limit position. The key switch device having a metal scissor structure can be widely used in computer keyboards, handheld computers, a variety of embedded keyboards and key switch devices operated by tapping keys. The structural strength and the structural rigidity of the scissor supporting structure are greatly improved, the ultra-light and ultra-thin metal scissors are realized, and the miniaturization of the key device is further realized.

Description

Key switch device supported by sheet metal scissor foot with elastic hook limit structure

Priority statement:

Claim 9 of the present invention claims priority to claim 1 and corresponding embodiments of the invention patent application No. 2015101574277 filed on Apr. 05, 2015, the disclosure of which is hereby. Priority of claim 2 and corresponding embodiments of the invention patent application on the 05th;

Claims

3 and 4 of the present invention claim the priority of claim 1 or claim 2 and the corresponding embodiment of the invention patent application No. 2015103291395, filed on Jun. 15, 2015, to the Chinese National Intellectual Property No. 16 Requires the priority of the invention patent application with the application number 2015103291395 submitted to the China National Intellectual Property Document on June 15, 2015;

Claims 2 and 5-8 and Claim 19 of the present invention claim priority from claims 1-10 of the invention patent application No. 2015102320193, filed on May 09, 2015, and the priority of the respective embodiments. right.

Technical field

The present invention relates to a key switch device that performs a keystroke operation, and more particularly to a key switch device that is loaded in a keyboard as an input device of an electronic instrument. The invention also relates to a keyboard provided with a plurality of such key switch devices.

Background technique

In a thin type, that is, a low-height type keyboard mounted in a portable electronic device such as a notebook type or a palm-sized computer, the key switch device that requires the hitting operation is lowered in height, and the operability is improved, that is, the hand feels good--- --. In general, a key switch device that can be used in a low-height type keyboard is provided with: a support plate (for example, a metal plate or a lower bottom plate of a keyboard); a key cap disposed above the support plate; and interlocking with each other and mounted on the support plate A pair of plastic scissor foot members that guide and support the keycap in the vertical direction; a switching mechanism corresponding to the contact portion of the opening and closing circuit of the lifting and closing movement of the keycap. By synchronizing the pair of plastic scissor foot members with each other, the key cap can maintain the posture parallel to the support plate in a substantially vertical direction with respect to the support plate, and simultaneously perform the lifting movement. The keystroke operation characteristic of the key switch device is affected by the stroke amount of the lifting and lowering action of the key cap, the rigidity of the plastic scissors foot member, the clearance between the plastic scissors foot member and the key cap, and The influence of the keystroke operation characteristics of the so-called keystroke feeling in the lifting motion.

In the existing portable electronic devices such as notebook or palmtop computers, a thin plastic X support structure device is generally used. Referring to FIG. 1 and FIG. 2, the key structure device of the prior keyboard includes a key cap 1, the reset element is an elastic body 11, and has a switch. The switch circuit 12, the support plate 15 having the mating portion, and the scissor foot support 16 having the upper and lower mating portions (the scissor foot support 16 is composed of the right scissor foot 4 and the left scissor leg 8), and the scissor foot support 16 is respectively passed through the upper and lower mating portions The keycap 1 and the mating portion of the support plate 15 are rotated or slidably connected, and the scissor-leg support 16 which is X-shaped when viewed from the side constitutes a synchronous linkage support structure by the mutual force transmission between the middle portions to ensure that the key cap 1 is parallel to the support. The board 15 moves up and down.

The mating portion of the support plate 15 is composed of a support plate rotating portion 13 and a support plate sliding portion 14, and the scissor foot support 16 (both produced by plastic) is composed of a right scissor foot 4 and a left scissor foot 8, and the upper and lower fits of the scissor foot support 16 The parts are respectively composed of a lower hinge shaft 9, a lower shaft 7 and a scissor upper rotating portion 10, and a scissor upper sliding portion 6. The synchronous linkage supporting structure is composed of a central shaft 5 on the right scissor base 4 and an outer frame on the plastic left scissor foot 8. The hole is hinged.

The device is hinged by a central shaft 5 on the right scissor foot 4 made of plastic and a central hole on the left scissor foot 8 made of plastic, and the lower hinge shaft 9 and the lower shaft 7 are respectively rotated with the support plate on the support plate 15. 13 and the strut sliding portion 14 are in a rotational fit and a sliding fit. The scissors upper rotating portion 10 and the scissor upper sliding portion 6 are slidably engaged with the keycap sliding portion 3 and the key cap rotating portion 2 of the keycap 1, respectively. Forming a plastic X support structure device, and lifting the key cap 1 upward by a rubber-shaped elastic member 11 , and the linkage portions of the left scissor foot 8 and the right scissor foot 4 are respectively located near the middle of the scissor arm The pivot shaft 5 and the pivot hole 5c are configured to rotate together; the connecting portions of the left scissor foot 8 and the right scissor foot 4 respectively connected to the keycap 1 and the support plate 15 are respectively disposed on the upper rotating or lower end of the scissor arm. The slide shaft 7 and the upper slide portion 6 and the lower hinge shaft 9 are formed.

The rubber ring 11 is mounted and fixed on the upper surface of the switch circuit 12 having the switch and corresponds to the concave lower surface of the keycap 1, and the switch circuit 12 having the switch is mounted and fixed on the upper surface of the support plate 15, on the support plate 15. The support plate rotating portion 13 and the support plate sliding portion 14 pass through corresponding through holes on the switch circuit 12 having the switch, and are located near the upper surface of the switch circuit 12 having the switch, and the plastic left scissor leg 8 and the plastic right scissor foot 4, the lower end of the scissor foot support is respectively rotatably and slidably connected to the support plate rotating portion 13 and the support plate sliding portion 14 on the support plate 15, and the upper end thereof is respectively connected with the keycap sliding portion 3 and the keycap sliding portion on the keycap 1 3 is a rotary fit and a sliding fit.

The existing plastic elastic limit structure of the plastic keycap 1 has problems:

Since the birth of the keyboard, the plastic elastic limit structure is set on the keycap 1 of the notebook keyboard. See Figure 2--1 to Figure 2--5. When the keycap 1 is installed, the keycap sliding part 3 is first installed on the scissors. On the upper sliding portion 6, the keycap is further rotated downward. During the pressing process, the two short and thick plastic elastic limiting structures of the keycap rotating portion 2 need to produce a deformation of 0.15 mm on one side - about 6 Degree of rotation, two short and thick plastic elastic limit structure width B1 is about 0.7mm, length H1 is about 1.6mm, B1/H1 = 0.4375, because plastic is plastic material, short and thick plastic elastic limit structure elasticity The difference, the low strength, the limit of the interference is small, and the thinner and thinner the notebook keyboard, the two short and thick plastic elastic limit structures (H1 size) of the key cap rotating part 2 limit the design of the low height of the keycap 1. At the same time, due to the influence of the injection molding defect, the two short-thick plastic elastic limit structure molds of the key cap rotating portion 2 need to be inclined and pulled out, etc. The two short and thick plastic elastic limit structures of the key cap rotating portion 2 are caused. The factory defect rate is high.

1. The keycap 1 of the notebook keyboard is very prominent after leaving the factory. The problem of the falling off of the notebook keyboard and the failure of the switch contacts are the two most urgent problems to be solved in the current notebook keyboard.

2. The plastic elastic limit structure of the keycap 1 of the notebook keyboard has the influence of injection molding defects.

3. The short-and-thick plastic elastic limit structure of the key top of the notebook keyboard 1 has a interference of unilateral 0.15mm. When the interference is too small, the key phenomenon is easy to occur; when the interference is excessive When it is large, two pieces of short and thick plastic elastic limit structure of the key cap rotating portion 2 are liable to breakage failure and the hidden failure of the buried fracture.

4. Two short and thick plastic elastic limit structures have poor elasticity and low strength.

5, the injection molding precision is lower than the stamping precision of the thin plate, precision injection molding - the tolerance of the small-sized structural injection molded parts is 0.08mm, the linear size stamping---the punching precision of the thin plate is 0.026mm, and the punching and bending precision of the thin plate is 0.5 degree.

6, thinning the key cap, is bound to shorten - short and thick plastic elastic limit structure, short and thick plastic elastic limit structure shortened, resulting in short and thick plastic elastic limit structure elastic lower limit, limiting the further low height of the keycap Design.

Summary of the invention

The object of the present invention is to solve the above problems, and to provide an elastic limiting structure on the plastic keycap 1 so that the plastic keycap 1 becomes a fully rigid structure and the elastic limiting structure is disposed on the sheet metal. On the scissor foot, the problem of the existing laptop keyboard drop key is completely solved, so that the key cap of the key switch device has high yield and durability, and the elastic limit of the thin metal scissors foot of the key switch device is made. The structure is flexible, high strength and durable. .

The technical solution of the present invention is realized by the following steps: including a key cap, a resetting element, a switch circuit having a switch, a support plate having a fitting portion, and a scissor foot support having an upper and lower fitting portion, and the scissor foot support is respectively connected to the key cap through the upper and lower fitting portions The supporting portion of the support plate is rotated or slidably connected, and the scissor foot support constitutes a synchronous linkage support structure by the mutual force transmission to ensure that the key cap moves up and down parallel to the support plate, wherein the scissor foot support 16 is Stamping and forming on the metal plate surface; the scissor foot support 16 is formed with an elastic sheet metal elastic arm 20; the scissor foot support 16 has a stamping and forming anti-off structure; and the key cap 1 is provided with a key limit convex The table 37; the mutually supported scissor foot support 16 is engaged with the key limit boss 37 of the keycap 1 through the scissor anti-off structure to prevent the key from coming off or to limit the key cap 1 to the upper limit position;

When the key cap is installed, the engaging portion of the key cap 1 or the key limiting boss 37 elastically deforms the sheet metal elastic arm 20, and the scissors retaining structure passes over the key limiting boss 37 to enter the limit matching space of the key cap 1. Under the action of the restoring force of the resetting element, the scissor retaining structure is pressed against the key limiting boss 37.

Further, when the keycap is installed, the upper end portion of the scissor foot support 16 is along the key concave bottom surface 35 of the keycap 1 or the key inner concave surface 34 or the key limiting boss 37 on the key concave bottom surface 35 of the keycap 1. , sliding from the inside to the outside or from the outside to the inside of the key cap 1 , the mating portion of the key cap 1 or the key limiting boss 37 elastically deforms the sheet metal elastic arm 20, and the scissors anti-off structure crosses the key limit The boss 37 enters the limit fit space of the keycap 1.

Further, the scissor foot support 16 is stamped and formed on a metal plate surface; the scissor foot support 16 has an elastic sheet metal elastic arm 20 extending upward, and the cantilever end of the sheet metal elastic arm 20 is stamped and formed. a scissor retaining structure; a key limiting boss 37 is disposed on a bottom surface of the key inner bottom surface 35 of the keycap 1; the mutually supported scissor foot support 16 passes through the scissors retaining structure and the key end of the key cap 1 The position mating portion 36 is engaged to limit the keycap 1 to the upper limit position.

Further, the scissor foot support 16 is press-formed on a thin metal plate surface, and the end surface of the scissor foot support 16 has an elastic sheet metal elastic arm 20 extending upward, and the sheet metal elastic arm 20 The cantilever end has a stamped and formed scissor-preventing structure, the scissor anti-off structure has a sheet metal limit stop 21, and the sheet metal limit stop 21 is located near the upper end portion of the scissor foot support 16; A key limiting boss 37 is disposed on the bottom surface of the concave bottom surface 35, and a key end limiting engaging portion 36 is disposed outside the key limiting boss 37, and a key is disposed inside the key limiting boss 37. a horizontally mounted guide portion; the mutually supported scissor foot support 16 is engaged with the key end limit matching portion 36 of the keycap 1 through the sheet metal limit stop 21, and the key is engaged Cap 1 is limited to the upper limit.

Further, the upper matching portion of the same scissor foot support 16 has a cantilevered notch through hole 20a penetrating downwardly from the plate surface, and a sheet metal elastic arm 20 extending upward at the bottom of the cantilevered notch through hole 20a is The cantilever end of the sheet metal elastic arm 20 has a sheet metal limit stop 21 formed by bending up the sheet metal; the key recessed bottom surface 35 between the two left mating portions of the keycap 1 and the two right mating portions a key limiting boss 37 is disposed on the bottom surface, and a key end limiting engaging portion 36 is disposed on the outer side of the key limiting boss 37; the key limiting boss 37 is supported by the key end limiting portion 36, The key supporting guide portion is configured. The mutually supported scissor foot support 16 is engaged with the key end limit matching portion 36 of the key cap 1 through the sheet metal limit stop 21 to limit the key cap 1 to the upper limit position.

Further, the sheet metal elastic arm 20 is bent downward to extend.

Further, between the left and right end faces of the sheet metal scissor foot support, and near the sheet metal scissor foot support 16, a cantilever notch through hole 20a penetrating through the sheet metal scissor support plate surface, in the cantilever notch through hole 20a The left or right end surface has a sheet metal elastic arm 20 extending toward the other end surface.

Further, the sheet metal elastic arm 20 extends at an angle with the plate surface of the scissor foot support 16, the sheet metal elastic arm 20 is in a cantilever shape, and the cantilever end of the sheet metal elastic arm 20 is formed with Sheet metal limit position 21.

Further, the key cap 1 has a rigid key limiting boss 37, and the key limiting boss 37 is composed of a key end limiting engaging portion 36 and an upright key upright mounting guide portion; The end of the elastic arm 20 interacts with the key upright mounting guide, the sheet metal elastic arm 20 is elastically deformed, and the sheet metal limit stop 21 passes over the key limit boss 37, and the sheet metal limit is applied by the restoring force of the reset element. The position gear 21 is pressed against the key end limit engaging portion 36 of the key limit boss 37 of the keycap 1, at which time the key cap 1 is restricted to the upper limit position.

Further, the key cap 1 has a rigid key limiting boss 37, and the key limiting boss 37 is composed of a key end limiting engaging portion 36 and a flat horizontal key mounting guide portion. The boss 37 is located on the concave bottom surface of the key cap; when installed, the scissor-proof structure of the cantilever end of the sheet metal elastic arm 20 interacts with the key-mounting guide portion, and the sheet metal elastic arm 20 is elastically deformed to constitute a scissor-proof structure. The sheet metal limit position 21 passes over the key limit boss 37, and the sheet metal limit position 21 is pressed against the key end limit fitting portion 36 of the key limit boss 37 of the keycap 1 under the action of the restoring force of the reset member. Above, the keycap 1 is now limited to the upper limit position.

The key switch device of the combined keycap of the present invention is a face-to-face matching and a scissors-restricted mating surface, including a key cap, a reset body, a switch circuit, a support plate having a matching portion, and a scissors having an upper and lower matching portion The foot support and the scissor foot support are respectively rotated or slidably connected with the mating portions of the key cap and the support plate through the upper and lower fitting portions, and the scissor foot support constitutes a synchronous linkage support structure by the mutual force transmission to ensure that the key cap is parallel to the support plate. The lifting movement is characterized in that: the scissor foot support 16 has a stamping and forming anti-off structure; the key cap 1 is provided with a key limiting boss 37, and the mutually supported scissor foot support 16 is passed through the scissor prevention structure. The key limiting boss 37 of the keycap 1 is limitedly engaged; the resetting body is composed of a magnetic body, and the scissors retaining structure of the scissor foot support 16 of the keying bracket 37 of the keycap 1 is slidably engaged with the keycap 1 The magnetic body is disposed, and the magnetic force of the magnetic body presses the sheet metal limit stop 21 constituting the scissors retaining structure against the key end limit fitting portion 36 of the key limit boss 37, and the key cap 1 is at the upper limit position.

Further, the magnetic body is fixedly connected to the sheet metal limit position 21, and a magnetic conductive material or a magnetic body or a sheet metal limit position 21 is disposed on the key limit boss 37, and a magnetic conductive material is used. Magnetic body is set on 37.

The positive effects of the present invention are:

1. The keycap 1 becomes a maintenance-free fully rigid structure, which greatly reduces the defective rate of the keycap 1 and completely solves the problem of the old keyboard keyboard being used when the keyboard is used.

2. The elastic limit structure of the sheet metal scissors foot has good elasticity and high strength, and can increase the interference of the limit position (up to 0.5mm), so that the reliability of the limit of the key cap and the thin metal scissors foot is high.

3. The elastic limit structure of the sheet metal scissors feet has no injection defects.

4, the elastic limit structure of the sheet metal scissors feet will not break failure. The hidden danger of deformation failure.

5. The low-profile design of the keycap can be further realized.

6. The matching surface of the scissor foot support 16 and the key cap is separately arranged from the scissor anti-off structure (ie, the scissor anti-off structure is independently set), so that the surface of the matching surface of the scissor foot support 16 and the key cap is a simple flat shape. The flat plate surface does not need to be processed, and the fitting precision and the machining precision are improved (the more the punching times of the sheet metal, the worse the machining precision is, the more the sheet metal plastic deformation is, the worse the machining precision is); the upper and lower sides supported by the scissors feet are supported. The smooth and straight plate surface realizes the surface matching with the key cap and the support plate, thereby greatly improving the matching precision, improving the wear resistance between the parts, and the key switch device is durable.

7. The upper mating portion of the scissor foot support 16 is composed of a flat plate surface and an independent anti-offset structure of the scissors, which simplifies the stamping process of the scissor foot support 16 and improves the processing precision of the scissor foot support 16.

8. The lower fitting portion of the scissor foot support 16 is composed of a flat upper surface of the scissor upper scissors surface and a lower scissors support portion, and only the left and right side plates of the lower end of the scissor foot support 16 are bent, thereby forming a curved surface. Shape The lower support portion of the scissors is formed by surface matching between the lower plate upper surface of the scissors and the curved lower surface of the scissor supporting portion and the supporting portion of the support plate 15, thereby improving the fitting precision and the machining accuracy.

The key switch device of the metal scissor foot structure can be widely applied to a computer keyboard, a palmtop computer, various embedded keyboards, and a key switch device for performing a keystroke operation. The strength and structural rigidity of the scissor foot support structure are greatly improved, and the metal scissor foot realizes ultra-light and ultra-thin and further realizes miniaturization of the key device.

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 embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are Some embodiments of the present invention may also be used to obtain other drawings based on these drawings without departing from the art.

Figure 1 is a structural view of a conventional plastic scissor foot support structure device of a key cap;

2 is a connection diagram of a conventional plastic scissor foot support structure device of a key cap;

Figure 2-1 is a diagram showing the installation process of an existing keycap;

Figure 2-2 is a diagram showing the installation process of an existing keycap;

Figure 2-3 is a diagram showing the installation process of an existing key cap;

Figure 2-4 is a diagram showing the installation process of an existing key cap;

Figure 2-5 is a diagram showing the installation process of an existing keycap;

Figure 3 is a perspective view of an inner scissor leg of a width-bent edge;

Figure 4 is a perspective view of an outer scissor leg of a width-bent edge;

Figure 5 is an assembled perspective view of Figures 3 and 4;

Figure 6 is a perspective view of the rigid keycap of the present invention;

Figure 7 is a front elevational view of Figure 6;

Figure 8 is a cross-sectional view taken along line B-B of the key mounting process of Figure 7;

Figure 9 is a cross-sectional view taken along line A-A of the key mounting process of Figure 7;

Figure 10 is a cross-sectional view taken along line B-B of the key mounting process of Figure 7;

Figure 11 is a cross-sectional view taken along line A-A of the key mounting process of Figure 7;

Figure 12 is a cross-sectional view taken along line B-B of the key mounting process of Figure 7;

Figure 13 is a cross-sectional view taken along line A-A of the key mounting process of Figure 7;

Figure 14 is a cross-sectional view taken along line B-B of the key mounting process of Figure 7;

Figure 15 is a cross-sectional view taken along line A-A of the key mounting process of Figure 7;

Figure 16 is a cross-sectional view taken along line B-B of the key mounting process of Figure 7;

Figure 17 is a cross-sectional view taken along line A-A of the key mounting process of Figure 7;

Figure 18 is a perspective view of an inner scissor foot;

Figure 19 is a perspective view of an outer scissor foot;

Figure 20 is a perspective view of a rigid keycap of the present invention;

Figure 21 is an assembled perspective view of the present invention;

Figure 22 is a cross-sectional view of the present invention;

Figure 23 is a sheet metal outer scissor leg extending to the left of the sheet metal elastic arm 20 of the present invention;

Figure 24 is a sheet metal inner scissor leg extending to the left of the sheet metal elastic arm 20 of the present invention;

Figure 25 is a sheet metal outer scissor leg of the sheet metal elastic arm 20 of the present invention;

Figure 26 is a sheet metal inner scissor leg of the sheet metal spring arm 20 of the present invention;

Figure 27 is a sheet metal outer scissor leg of the sheet metal elastic arm 20 of the present invention extending leftward and rightward;

Figure 28 is a sheet metal inner scissor leg of the sheet metal elastic arm 20 of the present invention extending leftward and rightward;

Figure 29 is a rigid keycap of the sheet metal scissor foot of Figure 28;

Figure 30 is an assembled perspective view of the present invention;

Figure 31 is an assembled perspective view of Figure 30 with a rigid keycap mounted;

Figure 32 is a front elevational view of the present invention;

Figure 33 is a plan view of Figure 32;

Figure 34 is a cross-sectional view of Figure 32;

Figure 35 is a sheet metal outer scissor leg of the sheet metal elastic arm 20 of the present invention extending leftward and rightward;

Figure 36 is a sheet metal inner scissor leg of the sheet metal elastic arm 20 of the present invention extending leftward and rightward;

Figure 37 is an assembled perspective view of the metal scissor foot of the present invention;

Figure 38 is an assembled perspective view of the metal scissor foot of the present invention;

Figure 39 is a sheet metal eight-type scissors foot of the present invention, wherein the sheet metal elastic arm 20 extends upward;

Figure 40 is a rigid keycap of the present invention;

Figure 41 is an assembled perspective view of one of the present inventions;

Figure 42 is a front elevational view of the present invention;

Figure 43 is a cross-sectional view of the inner scissor of Figure 42 in an upper limit position;

Figure 44 is a cross-sectional view of the inner scissor foot of Figure 42 in an upper limit position;

Figure 45 is a cross-sectional view of the inner scissor of Figure 42 in an upper limit position;

Figure 46 is a cross-sectional view of the inner scissor of Figure 43 in a lower limit position;

Figure 47 is a cross-sectional view of the inner scissor foot of Figure 44 in a lower limit position;

Figure 48 is a cross-sectional view of the inner scissor foot of Figure 45 in a lower limit position.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Example 1

As shown in FIG. 3 - FIG. 49, the key switch device supported by the sheet metal scissor foot with the elastic hook limit structure of the present invention comprises a key cap, a reset element, a switch circuit with a switch, and a support with a matching portion. The plate and the scissor foot support having the upper and lower mating portions are respectively rotated or slidably connected to the mating portions of the key cap and the support plate through the upper and lower fitting portions, and the scissor foot support constitutes the synchronous linkage support structure by the mutual force transmission, Ensuring that the keycap is parallel to the support plate for lifting movement, the scissor foot support 16 is stamped and formed on the metal plate surface; the scissor foot support 16 is formed with an elastic sheet metal elastic arm 20; the scissor foot support 16 is stamped Formed scissors anti-off structure;

A key limiting boss 37 is disposed on the keycap 1; the mutually supported scissor foot support 16 is engaged with the key limiting boss 37 of the keycap 1 through the scissors anti-drop structure to prevent the key from coming out or the keycap 1 is limited to the upper limit.

Referring to FIG. 3 and FIG. 4, the scissor foot support 16 is press-formed on a thin metal plate surface, and the end surface of the scissor foot support 16 has an elastic sheet metal elastic arm 20 extending upward, the sheet metal elastic. The cantilever end of the arm 20 has a stamp-formed scissor retaining structure, and the scissor retaining structure has a sheet metal limit stop 21 located near the upper end of the scissor foot support 16.

Referring to FIG. 3 and FIG. 4, the metal inner scissor foot 28 and the metal outer scissor foot 31 have a width bending edge 24 perpendicular to the longitudinal direction of the scissor foot arm 23, the metal inner scissor foot 28 and the metal outer scissor foot 31 under the scissors. The plane 17 and the upper plane 19 of the scissors are connected by the width bending edge, and the lower plane 17 of the scissors is located under the metal inner scissors foot 28 and the metal outer scissors foot 31. The upper plane 19 of the scissors is located in the metal inner scissors foot 28 and gold. It is above the outer scissors foot 31.

The scissor foot support 16 is composed of a metal inner scissor foot 28 and a metal outer scissor leg 31 between the upper mating portions of the same scissor foot support 16 (ie, between the upper mating portions of the metal inner scissor legs 28 and the outer metal scissor legs 31). There is a cantilevered notch through hole 20a extending downward through the plate surface, and a sheet metal elastic arm 20 extending upward at the bottom end surface of the cantilevered notch through hole 20a is provided at the cantilever end of the sheet metal elastic arm 20 The sheet metal limit stop 21 formed by bending the sheet metal; the sheet metal elastic arm 20 is bent downward to extend.

The upper fitting portion of the scissor foot support 16 and the sheet metal elastic arm 20 are independently disposed.

Referring to FIG. 3, the left and right sides of the metal inner scissors foot 28 have an inner shear extension surface 25 extending upward from the lower plane 17 of the scissors, and the inner shear extension surface 25 is located beside the scissors foot arm 23, and the inner shear extension board The end of the cantilever end of the face 25 has an end support fitting portion 18, and the end support fitting portion 18 of the present embodiment is a corner portion of the end portion of the cantilever end of the inner shear extension plate surface 25.

Referring to FIG. 4, the inner side of the outer metal scissor leg 31 has an inner shear extending plate surface 25 extending upward from the lower plane 17 of the scissors, and the inner shear extending surface 25 is located beside the scissor arm 23, and the inner shear extending plate surface 25 The end of the cantilever end has an end support mating portion 30.

Referring to FIG. 5, the metal inner scissor foot 28 and the metal outer scissor foot 31 are respectively rotated or slidably connected with the key cap 1 (not shown) and the support plate 15; the end of the metal inner scissor foot 28 supports the mating portion 18 and the scissor foot. The lower plate faces of the arms 23 are respectively supported by the lower plate faces of the scissor legs 23 of the outer metal scissor legs 31 and the end support mating portions 30 to form a mutual force transmission structure to constitute a synchronous linkage support structure to ensure that the key caps are parallel to The support plate is used for lifting movement (not shown in the switch circuit diagram of the switch), and the reset element is composed of an elastic elastic element or a magnetic element. In this embodiment, a rubber spring 11 with better elasticity is used as the reset element.

Referring to FIG. 6, FIG. 8, FIG. 9, a rigid key limiting convex is respectively disposed near the middle of the key concave bottom surface 35 between the two fitting portions on the left side of the keycap 1 and the two fitting portions on the right side. The table 37 is provided with a key end limiting engaging portion 36 on the outer side of the key limiting boss 37. The key limiting boss 37 is composed of a key end limiting engaging portion 36 and a key lying mounting guiding structure 38. The key lying mounting guide structure 38 constitutes a key lying mounting guide portion, and the key lying mounting guide portion may be a flat surface, a curved surface, a corner portion or the like.

In the bottom surface of the key recessed bottom surface 35 between the two mating portions on the left side of the keycap 1 and the two mating portions on the right side, a T-shaped in-key recessed table 34 and an L-shaped key are respectively disposed. The inner concave-convex table 34, the sliding engagement portion 3 of the keycap 1 is formed by the key bosses in the key inner concave-convex table 34, the inverted shoulder 32, and the inverted curved surface 33 The opening of the sliding engagement portion 3 of the keycap 1 is directed to the middle of the keycap 1. When the upper end of the scissor foot support 16 is bent, the sliding engagement portion 3 of the keycap 1 is formed by the concave bottom surface 35 and the inverted arc. The face 33 is constructed.

Referring to FIG. 8 - FIG. 13, when the key cap is installed, the upper end portion of the scissor foot support 16 is slid into the key cap 1 from the inside to the outside along the key concave bottom surface 35 of the key cap 1 or the key inner concave surface 34 of the key cap 1. The mating portion of the key cap 1 or the key limiting boss 37 elastically deforms the sheet metal elastic arm 20, and the scissors retaining structure passes over the key limiting boss 37 to enter the limit matching space of the keycap 1, and is reset. Under the action of the restoring force of the component, the scissors retaining structure is pressed against the key limiting boss 37.

The key cap 1 has a key limiting boss 37, and the key limiting boss 37 is composed of an upright key end limiting engaging portion 36 and a flat horizontal key mounting guide, the key limiting boss 37 is located on the concave bottom surface of the key cap; when installed, the cantilever end of the sheet metal elastic arm 20 interacts with the key horizontal mounting guide, the sheet metal elastic arm 20 is elastically deformed, and the sheet metal limit position 21 passes over the key limit boss 37. Under the action of the restoring force of the resetting member, the sheet metal limit stop 21 is pressed against the key end limit engaging portion 36 of the key limit boss 37 of the keycap 1, and the keycap 1 is limited to the upper limit. Bit.

Referring to FIG. 7, FIG. 8, FIG. 9, when the key cap is installed, the entrance of the mating portion of the key cap is aligned with the upper mating portion of the scissor foot support 16, and the mounting height H of the scissor foot support 16 is supported, and L> L1, the keycap is moved in parallel downward, and the upper end portion of the scissor foot support 16 is moved from the inside to the outside along the surface of the key inner concave-convex table 34 toward the opening of the sliding engagement portion 3 of the keycap 1.

Referring to FIG. 10 and FIG. 11 , when the upper matching portion of the scissor foot support 16 (the upper plate surface of the scissor foot support 16 and the lower plate surface of the scissor foot support 16 in this embodiment) enters the inverted buckle surface 33 and the key boss. After the opening space of the uneven shoulder 32, the upper end portion of the sheet metal stopper 21 of the cantilever end of the sheet metal elastic arm 20 gradually comes into contact with the key lying mounting guide of the key restricting boss 37.

12 and 13, the upper end portion of the scissor foot support 16 continues to slide from the inside to the outside, and the upper end portion of the sheet metal limit stop 21 of the scissor foot support 16 moves along the key mounting guide. The lower plate surface of the scissor foot support 16 moves along the inverted buckle surface 33 (in this embodiment, the sliding engagement portion 3 of the key cap 1 is composed of the concave and convex shoulders 32 and the inverted buckle surface 33 in the key boss), in the key cap 1 The sliding elastic fitting arm 20 is elastically deformed by the sliding fitting portion 3 and the key lying mounting guide.

Referring to FIG. 14 and FIG. 15 , the scissors anti-off structure formed by the sheet metal limit position 21 enters the limit matching space of the key cap 1 over the key limit boss 37 , and the limit matching space of the key cap 1 is located at the key end limit. On the outer side of the mating portion 36, under the action of the restoring force of the reset element (not shown), the sheet metal limit position 21 is pressed against the key. The key end of the limiting boss 37 is restrained on the engaging portion 36. At this time, the key cap 1 is at the upper limit position, and the mutually supported scissor foot support 16 passes through the key limit of the sheet metal limit stop 21 and the key cap 1. The position mating portion 36 is engaged to limit the keycap 1 to the upper limit position.

Referring to FIG. 15, the limit position interference portion of the sheet metal limit position 21 and the key end limit portion 36 can be up to 0.5 mm.

Referring to Figures 16 and 17, the positional relationship of the parts when the keycap 1 is depressed during use (when the keycap 1 is below the upper limit).

Referring to FIG. 7 - FIG. 17, the upper fitting portion of the scissor foot support 16 is composed of a scissor upper support portion, a scissor upper end lower plate surface of the scissor foot support 16, and a separately disposed scissor anti-detachment structure, wherein the scissor upper support portion Cooperating with the keycap support engaging portion of the keycap 1, the lower upper plate surface of the scissors cooperates with the inverted shoulder arch 33 on the upper key reverse boss of the keycap 1.

The scissor retaining structure is located at the cantilever end of the upwardly extending resilient sheet metal resilient arm 20, and the scissor retaining structure is formed by the sheet metal limit stop 21.

The upper support portion of the scissor may be a circular arc surface of the upper portion of the scissor foot support 16; it may be a flat upper surface of the scissors upper surface; the upper surface of the upper end of the scissors may be a circular arc surface, and the circular arc surface passes through the bending plate Face formation.

The upper support portion of the scissors of the embodiment is a flat upper upper plate upper surface of the scissors;

The keycap support engaging portion of the embodiment is composed of a key engaging shoulder 32. The key engaging shoulder 32 is a curved surface, and the upper end upper surface 43 of the scissors is a flat surface, and the upper upper plate surface of the scissors is engaged with the key engaging shoulder 32.

The keycap support fitting portion may also be formed by the concave bottom surface 30 of the keycap. When the upper surface of the scissors is curved, and the concave bottom surface of the keycap is a plane, the upper surface of the upper surface of the scissors is matched with the concave bottom surface of the keycap. .

The scissor foot support is formed by sheet metal stamping, and the opening of the matching space formed between the concave bottom surface of the key cap 1 and the key matching shoulder 32 is directed to the middle of the key cap.

The scissor foot support 16 is rotated or slidably coupled to the mating portion of the key cap by the thickness dimension between the upper plate surface of the scissor foot support 16 and the lower plate surface of the scissor foot support 16.

The scissor foot support 16 is rotationally or slidably coupled to the mating portion of the support plate 15 by a thickness dimension between the upper plate surface of the scissor foot support 16 and the lower plate surface of the scissor foot support 16.

Separating the matching surface of the scissor foot support 16 and the key cap from the scissor anti-detachment structure (ie, setting the scissor anti-off structure independently), so that the surface of the matching surface of the scissor foot support 16 and the key cap is a simple planar shape, The flat plate surface does not need to be processed, which improves the matching precision and machining accuracy. (The more the punching times of the sheet metal, the worse the machining accuracy is, the more the sheet metal plastic deformation is, the more the machining accuracy is worse); the upper and lower sides are supported by the scissor foot support. The flat surface is respectively matched with the surface of the key cap and the support plate, the fitting precision is greatly improved, the wear resistance between the parts is improved, and the key switch device is durable.

The upper fitting portion of the scissor foot support 16 is composed of a flat plate surface and an independently disposed scissor anti-drop structure, which simplifies the punching process of the scissor foot support 16 and improves the machining precision of the scissor foot support 16.

The lower fitting portion of the scissor foot support 16 is formed by a flat upper surface of the scissor upper scissors surface and a lower scissors support portion, and only the left and right side plates of the lower end of the scissor foot support 16 are bent, thereby forming a curved surface shape. The lower support portion of the scissors is formed by surface matching of the lower plate upper surface of the scissors and the curved lower surface of the scissor support portion and the supporting portion of the support plate 15, thereby improving the fitting precision and the machining accuracy.

The keycap 1 has a keycap support portion that cooperates with the scissor foot support 16. The keycap support portion of the present embodiment employs a key inner concave and convex table 34 on the concave bottom surface of the key, and the keycap support portion can also be disposed in the concave portion of the key. On the bottom surface.

The mating portion of the keycap 1 is composed of a keycap support portion, an inverted shoulder arch 33 on the keycap 1, and a separately provided key retaining structure.

The support plate 15 has a support plate support portion that cooperates with the scissor foot support 16 , and the mating portion of the support plate 15 is composed of the support plate support portion and the inverted buckle shoulder arc 33 on the bending plate of the support plate 15;

The upper surface of the scissors lower support 16 is matched with the inverted shoulder arch 33 of the support plate 15 in a curved shape, and the lower support portion of the scissors is the lower end surface of the lower end of the scissors support 16;

The support plate support portion may be an upper plate surface of the support plate 15 or an upper surface of the switch circuit. The support plate support portion of the embodiment adopts an upper plate surface of the support plate 15.

The lower support portion of the scissors is an arc surface which can be an upper portion of the scissor foot support 16 and may be a corner portion of the lower end surface of the lower end of the scissors; the lower end surface of the lower end of the scissors may be a circular arc surface. It is formed by bending the plate surface. The lower scissors support portion of the embodiment adopts a circular arc surface formed by bending the left and right side plates of the lower end of the scissors foot support 16 .

The scissor foot support 16 has a flat upper upper end surface of the scissor and a curved inverted shoulder arch 33 of the key cap 1. The upper support portion of the scissor is the upper plate upper surface of the scissors; the upper upper surface of the scissors and the lower end of the scissors The lower plate faces are respectively engaged with the keycap support portion and the support plate support portion.

The lower fitting portion of the scissor foot support 16 is composed of a lower scissors support portion and a lower plate upper plate surface, wherein the lower scissors support portion cooperates with the support plate supporting portion on the support plate 15 or the upper surface of the switch circuit The surface of the upper end of the scissors cooperates with the inverted shoulder arch 33 on the folded side of the support plate 15.

The engaging portion of the key cap is composed of a key cap supporting portion and a key reverse protruding boss. The upper end surface of the scissors is matched with the inverted engaging portion of the key inverted boss, and the inverted engaging portion is formed by the inverted buckle shoulder 33 .

The keycap support portion is formed by a key engaging shoulder 32 on the concave bottom surface of the keycap, and the key engaging shoulder 32 and the inverted engaging portion of the key cap constitute a mating portion of the key cap; the upper mating portion of the scissor foot support is The upper end of the scissors is formed on the upper surface of the plate and the upper surface of the upper end of the scissors.

The upper support portion of the scissors is formed by an upper plate upper surface of the scissors; the key cap support portion is formed by a curved surface of a key on the concave bottom surface of the key or a curved surface of the key on the concave bottom surface or a key matching shoulder 32, by the key The cap supporting portion and the inverted engaging portion on the key inverted boss constitute a fitting portion of the key cap, and the upper end surface of the scissors is located on the lower plate surface of the upper end of the scissor foot support 16.

The invention provides an elastic limit structure on the plastic keycap 1 so that the plastic keycap 1 becomes a fully rigid structure, and the elastic limit structure is arranged on the sheet metal scissors foot, completely solving the existing notebook keyboard off. The problem of the key of the key makes the key cap of the key switch device high in durability and durable, and the elastic limit structure of the sheet metal scissors foot of the key switch device is elastic, high in strength and durable.

1. The key cap becomes a maintenance-free fully rigid structure, which greatly reduces the defective rate of the key cap, and completely solves the problem of the old keyboard keyboard being used when the keyboard is used.

5. The low-profile design of the keycap can be further realized. The strength and structural rigidity of the scissor foot support structure are greatly improved, and the metal scissor foot realizes ultra-light and ultra-thin and further realizes miniaturization of the key device.

Example 2

Referring to Figures 18 and 19, the lower scissors plane 17 of the metal inner scissor foot 28 is located outside the upper plane 19 of the scissors, and the lower scissors plane 17 of the outer metal scissor 31 is located on the inner side and the lower side of the upper plane 19 of the scissors, respectively. The lower scissors plane 17 and the upper plane 19 of the scissors are connected by a length bent edge 41 which is along the length direction of the scissors foot arm 23.

The inner scissors support portion 18 of the metal inner scissor foot 28 located outside the upper plane 19 of the scissors is perpendicular to the longitudinal direction of the scissor arm 23, and the outer metal scissor leg 31 has an end surface extending plate surface 43. The end surface of the cantilever end of the surface extension plate surface 43 is perpendicular to the longitudinal direction of the scissor foot arm 23.

An inner reinforcing flange 42 is formed on an end edge of the middle outer through hole of the metal outer scissor leg 31 and the inner scissors foot 28 of the metal.

Referring to FIG. 18, FIG. 19, the cantilever end of the elastic limit hook 20 of the metal inner scissor foot 28 and the metal outer scissor leg 31 is formed with an upwardly convex circular arc surface, and the upwardly convex circular arc surface constitutes a scissors prevention The structure is removed, and a sheet metal limit stop 21 and a sheet metal limit rear stop 39 are respectively formed on the upward convex arc surface, and the sheet metal limit position 21 may be a curved surface, a circular arc surface, a plane, and an elastic limit hook. 20 is a part of the 16-plate surface of the scissor foot support.

As shown in FIG. 20, the key limiting boss 37 is located on the concave bottom surface 35 of the key, and the key limiting boss 37 is composed of a vertical key end limiting engaging portion 36 and a flat horizontal key mounting guide. . The key lying mounting guide is a sloped surface, and the key lying mounting guide portion may be a corner portion of a plane, a curved surface, and a key limiting boss 37.

As shown in FIG. 21 and FIG. 22, a key limit rear stop 44 is further disposed at a position corresponding to the position of the key bottom surface 35 and the key limit boss 37, and the key limit rear stop 44 serves to limit the outward displacement of the scissors anti-off structure. The amount of displacement.

It should be ensured that the space between the key limit rear stop 44 and the key limit boss 37 can accommodate the arc-shaped sheet metal limit stop 21 and the sheet metal limit backstop 39. The limit interference of the key limiting boss 37 and the sheet metal limiter 21 is about 0.35 mm - 0.5 mm.

As shown in FIG. 22, when the arc surface of the key limit rear stop 44 and the curved end of the key end matching portion 36 are concentric circles, when the upward convex arc surface formed by the cantilever end of the elastic limit hook 20 is the same as the center, The engaging portion of the key cap is a rotation fitting portion 2, and the arc surface of the scissors retaining structure of the elastic limit hook 20 is rotationally engaged with the arc surface of the key limit rear block 44 and the curved surface of the key end limit matching portion 36.

The rest is the same as in the first embodiment.

Example 3

As shown in FIG. 23, FIG. 24, FIG. 25, FIG. 26, between the left and right end faces of the sheet metal scissor support, and near the upper end surface of the sheet metal scissor support, there is a cantilever gap penetrating through the support surface of the sheet metal scissor foot. The through hole 20a has a sheet metal elastic arm 20 that extends toward the other end surface on the left end surface or the right end surface of the cantilever notch through hole 20a.

As shown in FIG. 23 and FIG. 24, the sheet metal elastic arm 20 is a cantilever arm, and the scissors anti-drop structure is located at the cantilever end of the sheet metal elastic arm 20.

As shown in FIG. 25 and FIG. 26, the sheet metal elastic arm 20 is rigidly connected to the left and right ends of the support of the sheet metal scissor foot. The surface of the scissors is located on the sheet metal elastic arm 20, but it is preferably located in the middle of the sheet metal elastic arm 20 with the scissors retaining structure.

The anti-off structure of the scissors is composed of a sheet metal limit position 21 and a sheet metal limit rear block 39, and the sheet metal limit position 21 is smoothly connected with the sheet metal limit rear block 39.

The rest is the same as in Embodiment 2.

Example 4

As shown in FIG. 27 and FIG. 28, between the left and right end faces of the sheet metal scissor support, and near the support of the sheet metal scissor foot, there is a cantilevered notch through hole 20a penetrating through the support surface of the sheet metal scissor, and the cantilever notch is penetrated. The left end surface or the right end surface of the hole 20a has a sheet metal elastic arm 20 extending toward the other end surface. The cantilever end of the sheet metal elastic arm 20 is formed with a sheet metal limit position 21, and the sheet metal limit position 21 may be a crucible. The plate surface of the cantilever end of the gold elastic arm 20 may be an upwardly extending plate surface of the cantilever end of the sheet metal elastic arm 20 or a bent plate surface of the cantilever end of the sheet metal elastic arm 20, and the sheet metal limit position is used in this embodiment. 21 is an upwardly extending plate surface of the cantilever end of the sheet metal resilient arm 20.

The sheet metal elastic arm 20 is bent downward, and the sheet metal elastic arm 20 extends at an angle with the plate surface of the scissor foot support 16; the sheet metal elastic arm 20 and the scissor foot support 16 are clamped The angle is between 90 degrees ± 0 degrees and 90 degrees ± 20 degrees, and the sheet metal elastic arms 20 are two, but the sheet metal elastic arms 20 may be one, but two are preferred.

As shown in FIG. 29 and FIG. 31, the key cap 1 has a key limiting boss 37, and the key limiting boss 37 is composed of an upright key end limiting engaging portion 36 and an upright key upright mounting guiding surface 45. The key upright mounting guide surface 46 is formed by a key upright mounting guide surface 45 and a key upright mounting guide surface 46 to form a key upright mounting guide portion, wherein the key upright mounting guide surface 45 can be a flat surface, a curved surface, and the key upright mounting guide surface 46 It may be a flat surface or a curved surface, and the key upright mounting guide surface 45 is smoothly connected with the key upright mounting guide portion. The key upright mounting guide surface 45 and the key upright mounting guide surface 46 may be divided into two faces, or may be merged on the same surface. The key upright mounting guides are located on both sides of the key limiting boss 37.

As shown in Fig. 29---Fig. 34, the end of the sheet metal elastic arm 20 interacts with the key upright mounting guide, the sheet metal elastic arm 20 is elastically deformed, and the sheet metal limit position 21 passes over the key limit boss. 37. Under the action of the restoring force of the resetting member, the sheet metal limit stop 21 is pressed against the key end limit engaging portion 36 of the key limit boss 37 of the keycap 1, and the keycap 1 is limited to the upper limit. Bit.

The rest is the same as in Embodiment 2.

Example 5

As shown in FIG. 35---38, the sheet metal elastic arm 20 is bent upward, and the sheet metal elastic arm 20 is located above the plate surface of the scissor foot support 16, and the plate surface of the cantilever end of the sheet metal elastic arm 20 constitutes a crucible. Gold limit position 21.

The sheet metal elastic arm 20 is a part of the surface of the scissor foot support 16 , and the cantilever end of the sheet metal elastic arm 20 is formed with a sheet metal limit stop 21 .

The rest is the same as in the third embodiment.

Example 6

Referring to Fig. 39, the scissors retaining structure of the scissor foot support 16 is located on the face of the scissor foot support 16 corresponding to the cantilever end position of the sheet metal resilient arm 20 of the scissor foot support 16. The scissor anti-off structure is composed of a sheet metal limit stop 21 on the upper end of the scissor arc 47, wherein the sheet metal limit stop 21 is located on the scissor foot support 16, and the sheet metal limit block 21 is part of the scissor upper end bending arc 47. . The scissor upper end bending arcs 47 are located on the arms of the upper ends of the scissor legs 23 on the left and right sides of the scissor foot support 16; the cantilever ends of the upper ends of the two scissors bending bends 47 respectively extend to form an extension plate surface 19a, The upper end bending arch 47 and the extension plate surface 19a of the scissors are bent at the upper end of the scissor arm 23 . The sheet metal elastic arm 20 is formed by extending the surface of the scissor arm 23, and the sheet metal elastic arm 20 is a part of the surface of the scissor arm 23, and the sheet metal elastic arm 20 and the scissor arm 23 can be in the same plane. It is also possible not to be in the same plane, but it is best to be in the same plane.

The scissor anti-off structure of the embodiment is constituted by the upper end bending arc 47 of the scissors; the upper support portion of the scissors is constituted by the upper end bending arc 47 of the scissors.

Referring to FIG. 40, two key T-shaped bosses 50 which are vertically symmetrical and erected T-shaped are formed near the middle of the left and right ends of the key bottom surface 35 of the keycap 1, and the two cantilever ends of the key T-shaped boss 50 are The buckled shoulder arc 33a. A key inner concave and convex table 34 is formed on the inner side of the two key T-shaped bosses 50, and two key arc engaging surfaces 51 formed by two concave curved surfaces are formed in the key inner concave and convex table 34, and the key arc matching surface is formed. 51, the in-key concave and convex table 34 is divided into three segments, and the three-segment key inner concave and convex table 34 constitutes a key limiting boss 37. After the key cap is mounted, the arcs of the left and right sides of the two key arc matching faces 51 are restricted. The function of the cap, the keycap support fitting portion of the present embodiment is constituted by the key arc engaging surface 51.

The upper matching portion of the scissor foot support 16 is composed of a scissor upper end bending arc 47, a scissor foot support 16 upper upper end surface of the scissors, and an upper end bending arc 47 of the scissors, wherein the upper end of the scissor bends the arc 47 and the key circle of the key cap 1 The arc mating surface 51 cooperates with the upper end of the scissors and the inverted shoulder on the upper button of the keycap 1 Arc 33 fits.

Referring to FIG. 39, FIG. 40 and FIG. 41, the elastic sheet metal elastic arm 20 has a plate shape (best in a flat plate surface), and two sheet metal elastic arms 20 are located on the left and right sides of the scissor foot support 16, two The sheet metal elastic arm lower plate surface 48 of the sheet metal elastic arm 20 cooperates with the inverted buckle shoulder arc 33a of the key T-shaped boss 50, and the two scissors upper end bending arcs 47 are rotated and matched with the key matching arc 51. With the displacement fit, the left and right scissor legs of the scissor foot support 16 have the same structure, wherein the end of the extension plate surface 19a of one of the scissor foot supports 16, the upper plate surface of the extension plate surface 19a and the extension plate surface 19a of the other scissor foot support 16 The ends of the upper plate surface and the extension plate surface 19a are mutually supported, and the scissors foot support 16 is slidably engaged with the switch circuit 12 of the switch or the support plate 15, respectively.

Referring to FIG. 41 - FIG. 48, the two-arc arc-engaging surface 51 may be the same center, and the two-arc arc-engaging surface 51 may also be different centers. When the two-key arc-matching surface 51 has different centers, the two-part key arc fits. The face 51 can also be a flat surface, the scissor foot support 16 is in a displacement fit with the keycap, and the two-segment key arc engaging surface 51 acts to limit the mating portion of the scissor foot support 16 to move inward or outward. The two-arc arc-engaging surface 51 of the circular arc of the embodiment is concentric, and the two-segment key arc-matching surface 51 is smoothly connected into a complete circle.

It should be ensured that the inverted engaging portion 33a is located near the center of the key arc engaging surface 51, and is theoretically located at the center of the circle.

Referring to FIG. 45 and FIG. 48, the elastic sheet metal elastic arm lower plate surface 48 is located near the center of the upper end bending arc 47 of the scissors. When the key cap is rotated and engaged, the lower arm surface 48 of the sheet metal elastic arm is located at the upper end of the scissors. The center of the circular trajectory of the bending arc 47 is optimal (after the key cap and the scissor foot support 16 are mounted, it is ensured that the sheet metal elastic arm lower surface 48 is located at the center of the key arc engaging surface 51).

Referring to FIG. 41--FIG. 48, when the key cap is installed, the key cap moves downward, and the upper end portion of the scissor foot support 16 is along the key concave-concave table 34 on the key concave bottom surface 35 of the keycap 1 (key limiting boss 37) The surface of the key retaining structure consisting of the key limiting boss 37 is slid outwardly into the mating portion of the keycap 1, that is, the sheet metal elastic arm 20 enters the inverted shoulder arch 33a and the key limiting boss 37. The space between the surfaces continues to move the keycap downward, the angle between the scissor foot support 16 and the support base plate 15 is gradually reduced, and the mating portion of the sheet metal elastic arm 20 and the key cap 1 (the reverse buckle shoulder arc 33a) The surface of the key limiting boss 37 elastically deforms the sheet metal elastic arm 20 to the limit matching space of the key arc engaging surface 51 of the keycap 1 to the scissors retaining structure.

The engaging portion of the key cap 1 is composed of a key arc engaging surface 51 and an inverted shoulder arc 33a. The two arcs of the key arc engaging surface 51 respectively constitute a key end limit engaging portion 36 and a key limit rear stop 44.

The rest is the same as in the first embodiment.

Example 7

The key switch device of the combined keycap of the present invention is a face-to-face matching and a scissors limit matching surface, including a key cap, a reset body, a switch circuit, a support plate having a matching portion, and a scissor foot having an upper and lower matching portion Supporting, the scissor foot support is rotated or slidably connected to the mating portions of the key cap and the support plate through the upper and lower fitting portions respectively, and the scissor foot support constitutes a synchronous linkage support structure by mutual force transmission to ensure that the key cap is lifted parallel to the support plate motion,

The scissor foot support 16 has a stamped and formed scissor structure; the key cap 1 is provided with a key limiting boss 37, and the mutually supported scissor foot support 16 passes through the scissor retaining structure and the key of the key cap 1 The positioning boss 37 is limitedly engaged; the resetting body is composed of a magnetic body (not shown), and is disposed near the scissor-preventing structure of the scissor-leg support 16 of the key-receiving boss 37 of the keycap 1 and the keycap 1 The magnetic body and the magnetic force of the magnetic body press the sheet metal limit stop 21 constituting the scissor prevention structure against the key end limit fitting portion 36 of the key limit boss 37, and the key cap 1 is at the upper limit position.

A magnetic conductive material or a magnetic body (not shown) is fixedly connected to the sheet metal limit stop 21, and a magnetic conductive material or a magnetic body is disposed on the key limit boss 37; the magnetic body may also be disposed on the key limit boss At 37, the sheet metal limit position 21 is a magnetically permeable material.

The rest is the same as in the first embodiment.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the invention. within.

Claims

The key switch device supported by the sheet metal scissor foot with elastic hook limit structure comprises a key cap, a reset body, a switch circuit, a support plate with a matching portion, a scissor foot support with an upper and lower matching portion, and a scissors foot The support is rotated or slidably connected to the mating portions of the key cap and the support plate respectively through the upper and lower mating portions, and the scissor foot support constitutes 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 the feature thereof Yes: the scissor foot support 16 has a stamped and formed scissor structure; the key cap 1 is provided with a key limiting boss 37, and the mutually supported scissor foot support 16 passes through the scissor anti-off structure and the key cap 1 The key limiting boss 37 is limitedly engaged; the resetting body is composed of a magnetic body, and a magnetic body is disposed in the vicinity of the scissor-preventing structure of the scissor-leg support 16 in which the key limiting boss 37 of the keycap 1 and the keycap 1 are slidably engaged, magnetic The magnetic force of the body presses the sheet metal limit stop 21 constituting the scissor retaining structure against the key end limit engaging portion 36 of the key limit boss 37, at which time the key cap 1 is at the upper limit position.
The key switch device supported by the sheet metal scissor foot with elastic hook limit structure comprises a key cap, a reset element, a switch circuit with a switch, a support plate with a matching portion, and a scissor foot support with an upper and lower matching portion. The scissor foot support is rotated or slidably connected to the mating portions of the key cap and the support plate respectively through the upper and lower fitting portions, and the scissor foot support constitutes a synchronous linkage support structure by the mutual force transmission, so as to ensure that the key cap moves up and down parallel to the support plate. Its characteristics are:

The scissor foot support 16 is stamped and formed on a metal plate surface;

The upper engaging portion of the scissor foot support 16 is composed of a scissor upper support portion, a scissor upper end lower plate surface of the scissor foot support 16, and a separately disposed scissor retaining structure, wherein the upper support portion of the scissor and the key cap support of the key cap 1 are supported. The upper end surface of the upper end of the scissors on the upper surface of the scissor foot support 16 cooperates with the inverted engaging portion on the key reverse boss on the key cap 1;

The scissor foot support 16 is formed with an elastic sheet metal elastic arm 20, and the scissor foot support 16 has a stamped and formed scissor-proof structure; the key cap 1 is provided with a key limiting boss 37, and the mutual support The scissor foot support 16 is engaged with the key limit boss 37 of the key cap 1 through the scissors anti-drop structure to prevent the key from coming out or to limit the key cap 1 to the upper limit position;

When the key cap is installed, the engaging portion of the key cap 1 or the key limiting boss 37 elastically deforms the sheet metal elastic arm 20, and the scissors retaining structure passes over the key limiting boss 37 to enter the limit matching space of the key cap 1. Under the action of the restoring force of the resetting element, the scissor retaining structure is pressed against the key limiting boss 37.
The key switch device supported by the sheet metal scissor foot with elastic hook limit structure comprises a key cap, a reset element, a switch circuit with a switch, a support plate with a matching portion, and a scissor foot support with an upper and lower matching portion. The scissor foot support is rotated or slidably connected to the mating portions of the key cap and the support plate respectively through the upper and lower fitting portions, and the scissor foot support constitutes a synchronous linkage support structure by the mutual force transmission, so as to ensure that the key cap moves up and down parallel to the support plate. Its characteristics are:

The scissor foot support 16 is stamped and formed on a metal plate surface; the scissor foot support 16 is formed with an elastic sheet metal elastic arm 20, and the scissor foot support 16 has a stamped and formed scissor prevention structure;

A key limiting boss 37 is disposed on the keycap 1, and the mutually supported scissor foot support 16 is engaged with the key limiting boss 37 of the keycap 1 through the scissors anti-drop structure to prevent the key from coming out or the keycap 1 is limited to the upper limit position; when the key cap is installed, the engaging portion of the key cap 1 or the key limiting boss 37 elastically deforms the sheet metal elastic arm 20, and the scissors retaining structure passes the key limiting boss 37 to enter the key The limit fit space of the cap 1 is pressed against the key limit boss 37 by the restoring force of the reset element.
A key switch device supported by a sheet metal scissor foot having a resilient hook limit structure according to claim 2, wherein: when the key cap is mounted, the upper end portion of the scissor foot support 16 is along the concave bottom surface of the keycap 1 35 or the key recessed surface 34 or the key limiting boss 37 on the key bottom surface 35 of the keycap 1 is slid into the mating portion of the keycap 1 from the inside to the outside or from the outside to the inside, and the mating portion of the key cap 1 Or the key limiting boss 37 elastically deforms the sheet metal elastic arm 20, and the scissors retaining structure passes over the key limiting boss 37 to enter the limit matching space of the keycap 1.
A key switch device supported by a sheet metal scissor foot having an elastic hook limit structure according to claim 3, wherein the upper fitting portion of the scissor foot support 16 is supported by the upper support portion of the scissors and the scissor foot 16 The upper upper surface of the scissors and the anti-detachment structure of the scissors are configured, wherein the upper support portion of the scissors cooperates with the keycap support fitting portion of the keycap 1, and the lower surface of the upper surface of the scissors and the key on the upper surface of the upper end of the scissors foot support 16 The undercut engaging portion on the key inverted boss on the cap 1 is fitted.
A key switch device supported by a sheet metal scissor foot having an elastic hook limit structure according to claim 1 or 2 or 3 or 4 or 5, wherein: said scissor foot support 16 is supported by scissors feet 16 The thickness dimension between the upper upper plate surface and the scissors upper end lower plate surface of the scissor foot support 16 is rotated or slidably coupled with the mating portion of the key cap.
A key switch device supported by a sheet metal scissor foot having an elastic hook limit structure according to claim 1 or 2 or 3 or 4 or 5, wherein: said scissor foot support 16 is supported by scissors feet 16 The thickness between the lower upper plate surface and the lower end of the scissor foot support 16 is rotatably or slidably coupled to the mating portion of the support plate 15.
A key switch device supported by a sheet metal scissor foot having an elastic hook limit structure according to claim 1 or 2 or 3 or 4 or 5, wherein: the concave bottom surface of the key cap 1 and the key fit convex The openings of the mating spaces formed between the shoulders 32 are directed toward the middle of the keycap 1.
A key switch device supported by a sheet metal scissor foot having an elastic hook limit structure according to claim 1 or 2 or 3 or 4, wherein: said scissor foot support 16 is stamped and formed on a metal plate surface; The scissor foot support 16 has an independently extending elastic sheet metal elastic arm 20, and the cantilever end of the sheet metal elastic arm 20 has a stamped and formed scissor-proof structure; on the bottom surface of the key recessed bottom surface 35 of the keycap 1 A key limiting boss 37 is disposed; the mutually supported scissor foot support 16 is engaged with the key end limit matching portion 36 of the key cap 1 through the scissors retaining structure to prevent the key from coming off or the key cap 1 from being restricted. Limit position.
A key switch device supported by a sheet metal scissor foot having an elastic hook stop structure according to claim 1 or 2 or 3 or 4, wherein said scissor foot support 16 is on a thin metal plate surface In the press forming, the end surface of the scissor foot support 16 has an elastic sheet metal elastic arm 20 extending upward, and the cantilever end of the sheet metal elastic arm 20 has a stamped and formed scissor prevention structure, and the scissor anti-off structure has a sheet metal limit stop 21, the sheet metal limit stop 21 is located near the upper end portion of the scissor foot support 16; and a key limit boss 37 is disposed on a bottom surface of the key recessed bottom surface 35 of the keycap 1 a key end support portion 36 is disposed on an outer side of the key limit boss 37, and a key lying guide portion is disposed on an inner side of the key limit boss 37; the mutually supported scissor foot support 16 passes through a sheet metal limit The position gear 21 is engaged with the key end limit engaging portion 36 of the keycap 1 to limit the keycap 1 to the upper limit position.
A key switch device supported by a sheet metal scissor foot having an elastic hook limit structure according to claim 1 or 2 or 3 or 4 or 5, wherein: the upper matching portion of the same scissor foot support 16 There is a cantilever notch through hole 20a penetrating downwardly from the plate surface, and a sheet metal elastic arm 20 extending upward at the bottom of the cantilever notch through hole 20a, and a crucible bent upward at the cantilever end of the sheet metal elastic arm 20 a gold limit stop 21; a key limit boss 37 is disposed on a bottom surface of the key concave bottom surface 35 between the two left mating portions of the keycap 1 and the two right mating portions, respectively The outer end of the positioning boss 37 is provided with a key end limiting engaging portion 36; the key limiting boss 37 is composed of a key end limiting engaging portion 36 and a key lying mounting guide, and the mutually supported scissor foot supports 16 pass The sheet metal limit position 21 is engaged with the key end limit matching portion 36 of the keycap 1 to limit the keycap 1 to the upper limit position.
A key switch device supported by a sheet metal scissor foot having a resilient hook limiting structure according to claim 9, wherein the sheet metal resilient arm 20 is bent downwardly.
A key switch device supported by a sheet metal scissor foot having an elastic hook limit structure according to claim 1 or 2 or 3, wherein: the left and right end faces of the sheet metal scissor support are adjacent to each other The sheet metal scissor foot support 16 has a cantilever notch through hole 20a penetrating through the sheet metal scissor support plate surface, and a sheet metal elastic arm 20 extending toward the other end surface on the left end surface or the right end surface of the cantilever notch through hole 20a.
A key switch device supported by a sheet metal scissor foot with an elastic hook limit structure according to claim 13, wherein the sheet metal elastic arm 20 extends at an angle to the plate surface of the scissor foot support 16. The sheet metal elastic arm 20 is in a cantilever shape, and the cantilever end of the sheet metal elastic arm 20 is formed with a sheet metal limit stop 21.
A key switch device supported by a sheet metal scissor foot with an elastic hook limit structure according to claim 13, wherein the sheet metal elastic arm 20 is rigidly connected to the left and right end faces of the sheet metal scissor support, and the scissors The detachment prevention structure is located on the sheet metal elastic arm 20.
A key switch device supported by a sheet metal scissor foot having an elastic hook limit structure according to claim 1 or 2 or 3 or 4 or 13 or 14, wherein said key cap 1 has a rigid key limit The boss 37, the key limiting boss 37 is composed of a key end limiting engaging portion 36 and an upright key upright mounting guide portion; at the time of installation, the end portion of the sheet metal elastic arm 20 interacts with the key upright mounting guide portion. The sheet metal elastic arm 20 is elastically deformed, and the sheet metal limit position 21 passes over the key limit boss 37. Under the action of the restoring force of the reset element, the sheet metal limit position 21 is pressed against the key limit boss of the keycap 1. The key end of the 37 is limited to the mating portion 36, at which time the keycap 1 is limited to the upper limit position.
A key switch device supported by a sheet metal scissor foot having an elastic hook limit structure according to claim 1 or 2 or 3 or 4 or 13, wherein said key cap 1 has a rigid key limit boss 37, the key limiting boss 37 is composed of a key end limiting engaging portion 36 and a flat horizontal key mounting guide portion, the key limiting boss 37 is located on the concave bottom surface of the key cap; when installed, the sheet metal elastic The scissor-preventing structure of the cantilever end of the arm 20 interacts with the key-mounting guide portion, and the sheet metal elastic arm 20 is elastically deformed, and the sheet metal limit position 21 constituting the scissor-proof structure passes over the key limit boss 37, and the reset element Under the action of the restoring force, the sheet metal limit position 21 is pressed against the key end limit fitting portion 36 of the key limit boss 37 of the keycap 1, and the key cap 1 is restricted to the upper limit position.
A key switch device supported by a sheet metal scissor foot having an elastic hook limit structure according to claim 1 or 2 or 3 or 5, wherein the separately disposed scissor retaining structure is located on the upper support portion of the scissors and the scissor foot The upper end of the scissor of the support 16 is next to the lower plate.
A key switch device for supporting a sheet metal scissor foot with an elastic hook limit structure according to claim 3, wherein the key cap 1 has a key cap support portion that cooperates with the scissor foot support 16, and the key cap 1 is matched. The support portion is composed of a keycap support portion, an inverted snap-fit arc 33a on the keycap 1, and a key release structure; the support plate 15 has a support plate support portion that cooperates with the scissor foot support 16, and the mating portion of the support plate 15 is supported by the support plate. And a reverse-fitted arc 33a on the bending plate of the support plate 15; the lower plate upper surface of the scissors foot support 16 is matched with the support plate 15 in a curved shape, and the lower support portion is a scissors. The lower end of the lower support of the foot support 16; the lower end of the upper end of the scissor support 16 is matched with the arcuate inverted engagement arch 33a of the keycap 1, and the upper support of the scissors is the upper end of the upper surface of the scissors The upper surface of the upper end of the scissors and the lower surface of the lower end of the scissors are respectively matched with the key cap support portion and the support plate support portion.
A key switch device supported by a sheet metal scissor foot having an elastic hook limit structure according to claim 1 or 2 or 3, wherein the sheet metal elastic arm 20 is located at two scissors matched with the key cap 1. Between the upper end lower plate faces, or the sheet metal elastic arm 20 is located outside the upper surface of the two upper ends of the scissors which are engaged with the key cap 1.
A key switch device supported by a sheet metal scissor foot with an elastic hook limit structure according to claim 1, wherein the magnetic body is fixedly connected to the sheet metal limit stop 21 on the key limit boss 37. The magnetically permeable material or the magnetic or sheet metal limiter 21 is provided with a magnetically permeable material, and a magnetic body is disposed on the key limiting boss 37.