Ultrathin keyboard switch balancing stand tension spring reset structure

Abstract

The utility model discloses a tension spring reset structure of an ultra-thin keyboard switch balancing stand. Comprising a base plate, a first balancing frame rotationally arranged on the base plate, a second balancing frame rotationally arranged on the base plate, an upper cover arranged on the first balancing frame and the second balancing frame, and a reset elastic body arranged between the first balancing frame and the second balancing frame. The first balancing frame and the second balancing frame are mutually crossed and can be pivoted together in an overlapping manner, a first hooking groove is formed in the middle of one end, close to the base plate, of the first balancing frame, a second hooking groove is formed in the middle of one end, close to the base plate, of the second balancing frame, the reset elastic body is a tension spring, one end of the tension spring is hooked in the first hooking groove, and the other end of the tension spring is hooked in the second hooking groove. And the other end of the spring is hooked in the second hooking groove. The ultrathin keyboard switch balancing stand tension spring reset structure provided by the utility model is convenient to install, accurate and smooth in reset and good in reset effect, ensures the pressing hand feeling, can meet the light and thin use requirements, and is beneficial to use.

Description

Technical Field

[0001] The utility model relates to the technical field of key switches, in particular to a reset structure of a tension spring for a balance bracket of an ultra-thin keyboard switch. Background Art

[0002] A keyboard is an instruction and data input device used to operate a device, and also refers to a set of function keys arranged through a system to operate a machine or device. The keyboard is the most commonly used and main input device. Through the keyboard, English letters, numbers, punctuation marks, etc. can be input into a computer, so as to issue commands to the computer, input data, etc.

[0003] Conventionally, mechanical keys using a balance bracket usually use a compression spring to provide the elastic force for resetting. However, the compression spring requires a large stroke to achieve a proper pressing feel, which makes the overall thickness of the key large and unable to be thin and portable, not meeting the contemporary usage requirements for thin and light laptops. Summary of the Utility Model

[0004] Aiming at the above deficiencies, the purpose of the utility model is to provide a reset structure of a tension spring for a balance bracket of an ultra-thin keyboard switch, which is convenient to install, has precise and smooth reset, good reset effect, ensures the pressing feel and can meet the usage requirements of thin and light, and is beneficial to use.

[0005] The technical solution adopted by the utility model to achieve the above purpose is:

[0006] A reset structure of a tension spring for a balance bracket of an ultra-thin keyboard switch, comprising a base plate, a first balance bracket rotatably arranged on the base plate, a second balance bracket rotatably arranged on the base plate, an upper cover arranged on the first balance bracket and the second balance bracket, and a reset elastic body arranged between the first balance bracket and the second balance bracket. The first balance bracket and the second balance bracket cross each other and are pivotally connected together in a superposable manner. A first hook groove is formed in the middle of one end of the first balance bracket close to the base plate, and a second hook groove is formed in the middle of one end of the second balance bracket close to the base plate. The reset elastic body is a tension spring, one end of the tension spring is hooked in the first hook groove, and the other end is hooked in the second hook groove.

[0007] As a further improvement of the utility model, a first hook plate extending towards the middle of the base plate is formed in the middle of one end of the first balance bracket close to the base plate, and the first hook groove is formed in the middle of the first hook plate; a second hook plate extending towards the middle of the base plate is formed in the middle of one end of the second balance bracket close to the base plate, and the second hook groove is formed in the middle of the second hook plate.

[0008] As a further improvement of the utility model, the first hook plate is integrally triangular, and the second hook plate is integrally triangular.

[0009] As a further improvement of the present utility model, the overall shape of the first hook groove is triangular, and the overall shape of the second hook groove is triangular.

[0010] As a further improvement of the present utility model, on both sides of the middle part of the substrate, there are respectively formed a pair of reset limiting plates extending upward, and the reset elastic body is located between the two groups of reset limiting plates.

[0011] As a further improvement of the present utility model, on both sides of one end of the upper cover, there are respectively provided second upper limiting blocks embedded in the second balance frame, and on both sides of one end of the second balance frame, there are respectively formed second upper limiting holes for the second upper limiting blocks to be embedded and rotated.

[0012] As a further improvement of the present utility model, the second balance frame includes a second plate body rotatably arranged on the substrate and a second extension plate formed at one end of the second plate body and extending upward. The second upper limiting hole is arranged at one end of the second plate body or on the second extension plate or at the connection between the second plate body and the second extension plate; the overall shape of the second upper limiting block is L-shaped, and its horizontal part is hooked on the second upper limiting hole.

[0013] As a further improvement of the present utility model, on both sides of the other end of the upper cover, there are respectively formed first upper limiting holes for the first balance frame to be embedded, and on both sides of one end of the first balance frame, there are respectively formed first upper limiting blocks embedded in the first upper limiting holes and rotated.

[0014] As a further improvement of the present utility model, on both sides of the other end of the second balance frame, there are respectively formed second lower limiting blocks embedded in the substrate and rotated, and at one end of the substrate, there is formed a second lower limiting hole for the second lower limiting blocks to be embedded and rotated.

[0015] As a further improvement of the present utility model, on both sides of the other end of the first balance frame, there are respectively formed first lower limiting blocks embedded in the substrate and rotated, and at the other end of the substrate, there is formed a first lower limiting hole for the first lower limiting blocks to be embedded and rotated.

[0016] The beneficial effects of the present utility model are as follows:

[0017] By setting the present reset structure to include a substrate, a first balance bracket rotatably arranged on the substrate, a second balance bracket rotatably arranged on the substrate, an upper cover arranged on the first balance bracket and the second balance bracket, and a reset elastic body arranged between the first balance bracket and the second balance bracket, the first balance bracket and the second balance bracket cross each other and are pivotally connected together in a superposable manner. A first hook groove is formed in the middle of one end of the first balance bracket close to the substrate, and a second hook groove is formed in the middle of one end of the second balance bracket close to the substrate. The reset elastic body is a tension spring. One end of the tension spring is hooked in the first hook groove, and the other end is hooked in the second hook groove.

[0018] When an external force presses down the upper cover, the upper cover presses against the first balance bracket and the second balance bracket, thereby pressing down the first balance bracket and the second balance bracket. The distance between the first balance bracket and the second balance bracket increases. The first hook groove of the first balance bracket pulls one end of the tension spring outwards, and the second hook groove of the second balance bracket pulls the other end of the tension spring outwards. The tension spring deforms. After the external force is removed from the upper cover, the tension spring contracts and resets under its own elastic restoring force without an external force applied. One end of the tension spring pulls the first balance bracket inwards through the first hook groove, and the other end pulls the second balance bracket inwards through the second hook groove, so as to pull the first balance bracket and the second balance bracket inwards to achieve the purpose of lifting and resetting the first balance bracket and the second balance bracket. The upper cover arranged on the first balance bracket and the second balance bracket rises synchronously, completing the reset action of the key switch. The whole process is accurate and smooth in reset, and the reset effect is good. By using a tension spring, the tension spring has a high elastic coefficient and can quickly return to its original state after being stressed, thereby effectively improving the reset efficiency of the balance bracket, and further improving the reset efficiency of the key switch. The manufacturing materials of the tension spring are usually high-quality alloy steel or stainless steel, and these materials have excellent corrosion resistance and fatigue resistance, so that the tension spring maintains stable and reliable performance during long-term use, effectively ensuring the service life of the present reset structure. And the shape and size of the tension spring can be made according to actual needs, which is easy to install and replace, beneficial to production, and effectively improves the assembly efficiency of the key switch. The manufacturing cost of the tension spring is relatively low, the price is relatively affordable, effectively reducing the production cost of the present reset structure. The overall height of the tension spring is relatively low, which not only ensures the pressing feel but also meets the lightweight use requirements, beneficial to use.

[0019] The above is an overview of the technical solution of the utility model. The following further describes the present utility model in combination with the drawings and specific embodiments. Brief Description of the Drawings

[0020] Figure 1 is the overall schematic diagram of the present utility model;

[0021] Figure 2 is the structural schematic diagram of the present utility model without the upper cover;

[0022] Figure 3 It is a schematic structural diagram of the second balance bracket;

[0023] Figure 4 It is a schematic structural diagram of the first balance bracket;

[0024] Figure 5 It is a schematic structural diagram of the upper cover;

[0025] Figure 6 It is a schematic structural diagram of the substrate;

[0026] Figure 7 It is a side schematic diagram of the present utility model;

[0027] Figure 8 It is another overall schematic diagram of the present utility model;

[0028] In the figure: 1. Substrate; 11. Reset limit plate; 12. Second lower limit hole; 13. First lower limit hole; 2. First balance bracket; 21. First hook plate; 22. First hook slot; 23. First upper limit block; 24. First lower limit block; 3. Second balance bracket; 31. Second hook plate; 32. Second hook slot; 33. Second upper limit hole; 34. Second plate body; 35. Second extension plate; 36. Second lower limit block; 4. Upper cover; 41. Second upper limit block; 42. First upper limit hole; 5. Reset elastic body. Detailed implementation manners

[0029] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined purpose, the following provides a detailed description of the specific implementation manners of the present utility model in conjunction with the accompanying drawings and preferred embodiments.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0032] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Please refer to Figures 1 to 7 , an embodiment of the present utility model provides a reset structure of a tension spring for an ultra-thin keyboard switch balance bracket, which includes a base plate 1, a first balance bracket 2 rotatably arranged on the base plate 1, a second balance bracket 3 rotatably arranged on the base plate 1, an upper cover 4 arranged on the first balance bracket 2 and the second balance bracket 3, and a reset elastic body 5 arranged between the first balance bracket 2 and the second balance bracket 3. The first balance bracket 2 and the second balance bracket 3 cross each other and are pivotally connected together in a superposable manner. A first hook groove 22 is formed in the middle of one end of the first balance bracket 2 close to the base plate 1, and a second hook groove 32 is formed in the middle of one end of the second balance bracket 3 close to the base plate 1. The reset elastic body 5 is a tension spring, one end of the tension spring is hooked in the first hook groove 22, and the other end is hooked in the second hook groove 32.

[0034] When an external force presses down the upper cover 4, the upper cover 4 presses against the first balance bracket 2 and the second balance bracket 3, thereby pressing down the first balance bracket 2 and the second balance bracket 3. The distance between the first balance bracket 2 and the second balance bracket 3 increases. The first hook groove 22 of the first balance bracket 2 pulls one end of the tension spring outward, and the second hook groove 32 of the second balance bracket 3 pulls the other end of the tension spring outward. The tension spring deforms. After the external force is removed from the upper cover 4, the tension spring contracts and resets under its own elastic restoring force without external force applied. One end of the tension spring pulls the first balance bracket 2 inward through the first hook groove 22, and the other end pulls the second balance bracket 3 inward through the second hook groove 32, so as to pull the first balance bracket 2 and the second balance bracket 3 inward to achieve the purpose of lifting and resetting the first balance bracket 2 and the second balance bracket 3. The upper cover 4 provided on the first balance bracket 2 and the second balance bracket 3 rises synchronously to complete the reset action of the key switch. The whole process is accurate and smooth in reset, and the reset effect is good. By using a tension spring, the tension spring has a high elastic coefficient and can quickly return to its original state after being stressed, thereby effectively improving the reset efficiency of the balance bracket, and further improving the reset efficiency of the key switch. The manufacturing material of the tension spring is usually high-quality alloy steel or stainless steel. These materials have excellent corrosion resistance and fatigue resistance, so that the tension spring maintains stable and reliable performance during long-term use, effectively ensuring the service life of this reset structure. Moreover, the shape and size of the tension spring can be made according to actual needs, which is easy to install and replace, conducive to production, and effectively improving the assembly efficiency of the key switch. The manufacturing cost of the tension spring is relatively low, the price is relatively affordable, effectively reducing the production cost of this reset structure. The overall height of the tension spring is relatively low, which not only ensures the pressing feel but also meets the light and thin use requirements, facilitating use.

[0035] Preferably, as Figures 2 to 4 shown, a first hook plate 21 extending toward the middle of the substrate 1 is formed in the middle of one end of the first balance bracket 2 close to the substrate 1. The first hook groove 22 is formed in the middle of the first hook plate 21. One end of the tension spring is hooked in the first hook groove 22, so that one end of the tension spring is close to the inside of the substrate 1, avoiding affecting the normal operation of the tension spring when the second balance bracket 3 overlaps the first balance bracket 2 during downward pressing, and ensuring the normal operation of this reset structure; a second hook plate 31 extending toward the middle of the substrate 1 is formed in the middle of one end of the second balance bracket 3 close to the substrate 1. The second hook groove 32 is formed in the middle of the second hook plate 31. The other end of the tension spring is hooked in the second hook groove 32, so that one end of the tension spring is close to the inside of the substrate 1, avoiding affecting the normal operation of the tension spring when the first balance bracket 2 overlaps the second balance bracket 3 during downward pressing, and further ensuring the normal operation of this reset structure.

[0036] Preferably, as Figures 2 to 4As shown, the first hanging plate 21 is triangular as a whole, and the second hanging plate 31 is triangular as a whole. A triangle has stability. By setting the first hanging plate 21 as a triangle, the connection between the first hanging plate 21 and the first balance frame 2 can be effectively made more tightly and firmly, reducing the situation where the first hanging plate 21 breaks during the operation of the first balance frame 2 and cannot support the tension spring. By setting the second hanging plate 31 as a triangle, the connection between the second hanging plate 31 and the second balance frame 3 can be effectively made more tightly and firmly, reducing the situation where the second hanging plate 31 breaks during the operation of the second balance frame 3 and cannot support the tension spring. This further ensures the normal operation of this reset structure.

[0037] Preferably, as Figures 2 to 4 shown, the first hanging groove 22 is triangular as a whole, and the second hanging groove 32 is triangular as a whole. By setting the first hanging groove 22 as a triangle, the first hanging plate 21 can be better maintained in a triangular structure. A triangle has stability, ensuring that the connection between the first hanging plate 21 and the first balance frame 2 is more tightly and firmly, reducing the situation where the first hanging plate 21 breaks during the operation of the first balance frame 2 and cannot support the tension spring. By setting the second hanging groove 32 as a triangle, the second hanging plate 31 can be better maintained in a triangular structure. A triangle has stability, ensuring that the connection between the second hanging plate 31 and the second balance frame 3 is more tightly and firmly, reducing the situation where the second hanging plate 31 breaks during the operation of the second balance frame 3 and cannot support the tension spring.

[0038] To prevent the problem that the tension spring shifts during the operation of the first balance frame 2 and the second balance frame 3, resulting in inaccurate and unsmooth reset, as Figure 2 and Figure 6 shown, on both sides of the middle of the base plate 1, there are respectively formed a pair of reset limiting plates 11 extending upward. The reset elastic body 5 is located between the two groups of reset limiting plates 11, thereby limiting the position of the reset elastic body 5, preventing the problem that the reset elastic body 5 shifts during the operation following the first balance frame 2 and the second balance frame 3, resulting in inaccurate and unsmooth reset, and ensuring the reset accuracy and reset efficiency of this reset structure.

[0039] Regarding the specific way of fixedly installing the upper cover 4, as Figure 2 、 Figure 3 、 Figure 5 and Figure 8As shown, on both sides of one end of the upper cover 4, there are respectively provided second upper limit blocks 41 that are embedded in the second balance frame 3. On both sides of one end of the second balance frame 3, there are respectively formed second upper limit holes 33 for the second upper limit blocks 41 to be embedded and rotated. The substrate 1 is installed on the circuit board of the keyboard. When an external force presses the upper cover 4, the second upper limit blocks 41 on the upper cover 4 are embedded into the second upper limit holes 33, thereby driving the second balance frame 3 to move downward. Since the first balance frame 2 and the second balance frame 3 cross each other and are pivotally connected in a superposable manner, the second balance frame 3 synchronously drives the first balance frame 2 to move downward, and pulls the reset elastic body 5 to deform. After the key switch moves downward in multiple angles and aspects in a balanced manner, the conduction component in the key switch conducts, outputs a signal outward, which is conducive to the cooperation between various components. When the external force is removed from the upper cover 4, the reset elastic body 5 resets under its own elastic restoring force. The reset elastic body 5 contracts to pull up the first balance frame 2 and the second balance frame 3, thereby pushing up the upper cover 4 to reset, disconnecting the conduction between the conduction components, and waiting for the next use. The whole process is smooth, the structure is simple, which is conducive to production and use, the reset is precise and smooth, and the reset effect is good.

[0040] Regarding the specific structural setting of the above-mentioned conduction component, the conduction component can be a mechanical elastic sheet conduction, light conduction, magnetic axis conduction, magnetic induction conduction and other conduction structures. These conduction structures are all conventional technical means in the art, so they will not be specifically described in this embodiment.

[0041] Regarding the specific structural setting of the second upper limit block 41 and the second upper limit hole 33, such as Figure 2 、 Figure 3 、 Figure 5 and Figure 8 As shown, the second balance frame 3 includes a second plate body 34 rotatably arranged on the substrate 1, and a second extension plate 35 formed at one end of the second plate body 34 and extending upward. The second upper limit hole 33 is arranged at one end of the second plate body 34 or on the second extension plate 35 or at the connection between the second plate body 34 and the second extension plate 35, and its specific setting can be determined according to the actual situation, so it will not be specifically limited in this embodiment. The second upper limit block 41 is integrally L-shaped, and its horizontal part is hooked on the second upper limit hole 33, so that the upper cover 4 can drive the second balance frame 3 to press down and rise and reset by hooking the second upper limit block 41 on the second upper limit hole 33. The L-shaped structure only needs to pass the horizontal part of the second upper limit block 41 through the second upper limit hole 33 during assembly. Its overall structure is simple, the installation is convenient, which is conducive to production, the reset is precise and smooth, and the reset effect is good. The second hook plate 31 and the second lower limit block 36 are arranged on the second plate body 34.

[0042] When an external force presses on the upper cover 4, the upper cover 4 moves downward and presses against the second extension plate 35, driving the second extension plate 35 to move downward, thereby driving the second balance frame 3 to move downward. When the external force is removed from the upper cover 4, the reset elastic body 5 retracts and resets under its own elastic restoring force, and the second upper limit block 41 on the upper cover 4 presses against the upper end face of the second upper limit hole 33, thereby lifting and resetting the second balance frame 3, driving the first balance frame 2 and the second balance frame 3 to move upward and reset, thereby improving the reset efficiency of this installation structure.

[0043] Regarding the specific manner in which the upper cover 4 is arranged on the first balance frame 2, such as Figure 2 , Figure 4 , Figure 5 , Figures 7 to 8 As shown, on both sides of the other end of the upper cover 4, first upper limit holes 42 for the first balance frame 2 to be inserted are respectively formed. On both sides of one end of the first balance frame 2, first upper limit blocks 23 that rotate and are inserted into the first upper limit holes 42 are respectively formed. When assembly is required, only need to align the first upper limit blocks 23 with the first upper limit holes 42 and insert them. Its overall structure is simple, the installation is convenient, and it is conducive to production.

[0044] When an external force presses on the upper cover 4, the upper cover 4 drives the second balance frame 3 to press downward, and the upper cover 4 presses the first upper limit block 23 downward through the first upper limit hole 42. At the same time, the first upper limit block 23 rotates on the first upper limit hole 42, so as to realize the normal downward movement of the upper cover 4 driving the first balance frame 2. The first balance frame 2 and the second balance frame 3 cooperate with each other, so that no matter which position of the upper cover 4 the external force presses on, the key switch can perform a uniform downward movement, thereby realizing the conduction of the conduction component in the key switch and completing the signal output. When the external force is removed from the upper cover 4, the reset elastic body 5 resets under its own elastic restoring force. The reset elastic body 5 contracts to pull up the first balance frame 2 and the second balance frame 3. The first upper limit block rotates on the first upper limit hole 42, and the cooperation of several components thus lifts the upper cover 4 to reset, disconnecting the conduction between the conduction components and waiting for the next use. The whole process is accurately and smoothly reset, and the reset effect is good.

[0045] Regarding the specific manner in which the second balance frame 3 is rotatably arranged on the substrate 1, such as Figure 2 , Figure 4 , Figures 6 to 8As shown, on both sides of the other end of the second balance bracket 3, second lower limit blocks 36 that are embedded in the substrate 1 for rotation are respectively formed. At one end of the substrate 1, a second lower limit hole 12 for the second lower limit blocks 36 to be embedded and rotated is formed. During assembly, it only needs to align the second lower limit blocks 36 with the second lower limit holes 12 and embed them. Its overall structure is simple, the installation is convenient, which is beneficial to production. The substrate 1 is arranged on the circuit board of the keyboard, so that the second balance bracket 3 is restricted on the substrate 1 to ensure the normal operation of the second balance bracket 3. And during the process of the second balance bracket 3 moving downward or upward and resetting, it rotates in the second lower limit holes 12, thus ensuring the flexibility of the second balance bracket 3. The whole process of resetting is precise and smooth, and the reset effect is good.

[0046] Regarding the specific manner in which the first balance bracket 2 is arranged on the substrate 1, as Figure 2 , Figure 3 , Figures 6 to 8 shown, on both sides of the other end of the first balance bracket 2, first lower limit blocks 24 that are embedded in the substrate 1 for rotation are respectively formed. At the other end of the substrate 1, a first lower limit hole 13 for the first lower limit blocks 24 to be embedded and rotated is formed. During assembly, it only needs to align the first lower limit blocks 24 with the first lower limit holes 13 and embed them. Its overall structure is simple, the installation is convenient, which is beneficial to production. The substrate 1 is arranged on the circuit board of the keyboard, so that the first balance bracket 2 is restricted on the substrate 1 to ensure the normal operation of the first balance bracket 2. And during the process of the first balance bracket 2 moving downward or upward and resetting, it rotates in the first lower limit holes 13, thus ensuring the flexibility of the first balance bracket 2. The whole process of resetting is precise and smooth, and the reset effect is good.

[0047] It should be noted here that the ultra-thin keyboard switch balance bracket pull spring reset structure disclosed in the present invention is an improvement on the specific structure, and the specific control method is not the innovation point of the present invention. For the circuit board, keyboard, conduction component, pull spring and other components involved in the present invention, they can be general standard components or components known to those skilled in the art. Their structures, principles and control methods are all known to those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0048] The above is only a preferred embodiment of the present invention, and does not impose any limitation on the technical scope of the present invention. Therefore, other structures obtained by adopting the same or similar technical features as those of the above embodiments of the present invention are all within the protection scope of the present invention.

Claims

1. An ultra-thin keyboard switch balance bracket tension spring reset structure, comprising a base plate, a first balance bracket rotatably arranged on the base plate, a second balance bracket rotatably arranged on the base plate, an upper cover arranged on the first balance bracket and the second balance bracket, and a reset elastic body arranged between the first balance bracket and the second balance bracket. The first balance bracket and the second balance bracket cross each other and are pivotally connected together in a superposable manner, characterized in that: A first hook groove is formed in the middle of one end of the first balance bracket close to the substrate, a second hook groove is formed in the middle of one end of the second balance bracket close to the substrate, the reset elastic body is a tension spring, one end of the tension spring is hooked in the first hook groove, and the other end is hooked in the second hook groove.

2. The pull spring reset structure of the ultra-thin keyboard switch balance bracket according to claim 1, wherein: A first hook plate extending towards the middle of the substrate is formed in the middle of one end of the first balance bracket close to the substrate, and the first hook groove is formed in the middle of the first hook plate; a second hook plate extending towards the middle of the substrate is formed in the middle of one end of the second balance bracket close to the substrate, and the second hook groove is formed in the middle of the second hook plate.

3. The pull spring reset structure of the ultra-thin keyboard switch balance bracket according to claim 2, wherein: The first hook plate is triangular as a whole, and the second hook plate is triangular as a whole.

4. The pull spring reset structure of the ultra-thin keyboard switch balance bracket according to claim 2, characterized in that: The first hook groove is triangular as a whole, and the second hook groove is triangular as a whole.

5. The pull spring reset structure of the ultra-thin keyboard switch balance bracket according to claim 1, wherein: A reset limit plate extending upwards is formed on both sides of the middle of the substrate, and the reset elastic body is located between the two groups of reset limit plates.

6. The pull spring reset structure of the ultra-thin keyboard switch balance bracket according to claim 1, characterized in that: Second upper limit blocks embedded in the second balance bracket are respectively arranged on both sides of one end of the upper cover, and second upper limit holes for the second upper limit blocks to be embedded and rotated are respectively formed on both sides of one end of the second balance bracket.

7. The pull spring reset structure of the ultra-thin keyboard switch balance bracket according to claim 6, characterized in that: The second balance bracket includes a second plate body rotatably arranged on the substrate and a second extension plate formed at one end of the second plate body and extending upwards. The second upper limit hole is arranged at one end of the second plate body or on the second extension plate or at the connection between the second plate body and the second extension plate; the second upper limit block is L-shaped as a whole, and its horizontal part is hooked on the second upper limit hole.

8. The pull spring reset structure of the ultra-thin keyboard switch balance bracket according to claim 1, characterized in that: First upper limit holes for the first balance bracket to be embedded are respectively formed on both sides of the other end of the upper cover, and first upper limit blocks embedded in the first upper limit holes and rotated are respectively formed on both sides of one end of the first balance bracket.

9. The pull spring reset structure of the ultra-thin keyboard switch balance bracket according to claim 1, characterized in that: Second lower limit blocks embedded in the substrate and rotated are respectively formed on both sides of the other end of the second balance bracket, and a second lower limit hole for the second lower limit blocks to be embedded and rotated is formed at one end of the substrate.

10. The pull spring reset structure of the ultra-thin keyboard switch balance bracket according to claim 1, characterized in that: First lower limit blocks embedded in the substrate and rotated are respectively formed on both sides of the other end of the first balance bracket, and a first lower limit hole for the first lower limit blocks to be embedded and rotated is formed at the other end of the substrate.

Images