Ultra-thin keyboard switch balancing stand limiting structure
The super-thin keyboard switch balance arm structure enhances rotation flexibility and tactile feedback by using interchangeable limit holes and blocks, addressing the inflexibility and poor user experience of existing notebook computer keyboards.
Patent Information
- Application Number
- CN202422274766.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-14
AI Technical Summary
The existing laptop keyboard balance rack is not flexible enough, resulting in poor feel and affecting the user experience.
An ultra-thin keyboard switch balance frame limit structure is designed. By setting M-shaped, hoist-shaped or round limit holes on the substrate and upper cover, and combining the flat and long upper limit blocks and lower limit blocks, a rotation fulcrum is provided to ensure the flexibility and feel of the balance frame.
It improves the flexibility and user experience of keyboard switches, reduces the overall height of the switch, applies to different needs, and improves the practicality and production efficiency of key switches.
Smart Images
Figure CN223108740U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of key switches, in particular to a limiting structure for the balance frame of an ultra-thin keyboard switch. Background Art
[0002] A keyboard is an instruction and data input device used to operate the running of 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] With the increasing progress of technology, the thickness of existing notebook computers is getting thinner and thinner, so the keyboards on them are also getting thinner and lighter. At present, the balance frames used on the market are directly hinged to the base, with insufficiently flexible rotation and poor feel, resulting in a poor user experience. Summary of the Utility Model
[0004] Aiming at the above deficiencies, the purpose of the utility model is to provide a limiting structure for the balance frame of an ultra-thin keyboard switch, which is conducive to the cooperation of the balance frame body, can ensure the flexible rotation of the balance frame while reducing the overall height of the switch, and improve the user experience.
[0005] The technical solution adopted by the utility model to achieve the above purpose is:
[0006] A limiting structure for the balance frame of an ultra-thin keyboard switch, comprising a base plate, a balance frame body rotatably arranged on the base plate, and an upper cover arranged on the balance frame body. First balance frame limiting holes for the upper part of the balance frame body to be embedded and rotated are respectively formed on both sides of the upper cover, and second balance frame limiting holes for the lower part of the balance frame body to be embedded and rotated are respectively formed on both sides of the base plate. The first balance frame limiting holes are in an M shape or a gourd shape or a circular shape, the second balance frame limiting holes are in an M shape or a gourd shape or a circular shape, and the shapes of the first balance frame limiting holes and the second balance frame limiting holes can be freely combined.
[0007] As a further improvement of the utility model, an upper limiting block for rotating by being embedded in the first balance frame limiting hole is formed on the upper part of the balance frame body, and a lower limiting block for rotating by being embedded in the second balance frame limiting hole is formed on the lower part of the balance frame body.
[0008] As a further improvement of the utility model, both the upper limiting block and the lower limiting block are flat and long strip-shaped.
[0009] As a further improvement of the utility model, the first balance frame limiting hole is in an M shape, with a concave lower side and a convex middle, and the upper limiting block rotates with the convex position in the middle of the first balance frame limiting hole as the rotation fulcrum.
[0010] As a further improvement of the present utility model, a first balance frame guide post which protrudes downward and is integrally semi-circular is formed at the position of the upper cover between the two groups of first balance frame limiting holes, and the upper limiting block rotates with the middle protruding position of the first balance frame limiting hole and the first balance frame guide post as the rotation fulcrums.
[0011] As a further improvement of the present utility model, the first balance frame limiting hole is in a gourd shape, with the sides of the upper end and the lower end being recessed outward and the middle being convex inward, and the upper limiting block rotates with the middle protruding positions of the upper end and the lower end as the rotation fulcrums.
[0012] As a further improvement of the present utility model, the first balance frame limiting hole is circular, and the upper limiting block is tangent to the circular first balance frame limiting hole.
[0013] As a further improvement of the present utility model, the second balance frame limiting hole is in an M shape, with the side of the upper end being recessed and the middle being convex, and the lower limiting block rotates with the middle protruding position of the second balance frame limiting hole as the rotation fulcrum.
[0014] As a further improvement of the present utility model, the second balance frame limiting hole is in a gourd shape, with the sides of the upper end and the lower end being recessed outward and the middle being convex inward, and the lower limiting block rotates with the middle protruding positions of the upper end and the lower end as the rotation fulcrums.
[0015] As a further improvement of the present utility model, the second balance frame limiting hole is circular, and the lower limiting block is tangent to the circular first balance frame limiting hole.
[0016] As a further improvement of the present utility model, the balance frame body includes two groups of brackets which are cross-connected and pivotally connected together in a superposable manner. A rotating shaft is formed in the middle of any one of the two groups of brackets, and a rotating limiting hole for the rotating shaft to be embedded and rotated is formed in the middle of the other group of brackets.
[0017] As a further improvement of the present utility model, the rotating shaft is in a flat strip shape, and the rotating limiting hole is integrally in a gourd shape, with the sides of the upper end and the lower end being recessed outward and the middle being convex inward.
[0018] As a further improvement of the present utility model, the rotating shaft is in a flat strip shape, the rotating limiting hole is integrally circular, and the rotating shaft is tangent to the circular rotating limiting hole.
[0019] The beneficial effects of the present utility model are as follows:
[0020] By setting the limit mechanism to include a substrate, a balance frame body rotatably arranged on the substrate, and an upper cover arranged on the balance frame body, first balance frame limit holes for the upper part of the balance frame body to be embedded and rotated are respectively formed on both sides of the upper cover, and second balance frame limit holes for the lower part of the balance frame body to be embedded and rotated are respectively formed on both sides of the substrate. The upper part of the balance frame body is embedded in the first balance frame limit holes, and the lower part of the balance frame is embedded in the second balance frame limit holes, thereby completing the installation of the balance frame body on the substrate and the installation of the upper cover on the balance frame. Its structure is simple, the assembly is convenient, which is beneficial to improving production efficiency.
[0021] By making the first balance frame limit hole be M-shaped or gourd-shaped or circular, and the second balance frame limit hole be M-shaped or gourd-shaped or circular, the shapes of the first balance frame limit hole and the second balance frame limit hole can be freely combined. The M-shaped or gourd-shaped ones cooperate with the upper limit block and the lower limit block in the shape of a flat long strip to provide the fulcrums for the rotation of the upper limit block and the lower limit block. The circular shape is tangent to the upper limit block and the lower limit block respectively, so that the upper limit block and the lower limit block rotate more flexibly and provide a feeling of rotation. While reducing the overall height of the switch, the flexibility of the balance frame can be ensured, and the user experience can be improved. Different shapes can be selected according to the actual situation, so that the key switch can have different degrees of flexibility and different hand feelings, which are suitable for different needs and improve the practicality of the key switch.
[0022] The above is an overview of the technical solution of the utility model. The following will further illustrate the present utility model in combination with the accompanying drawings and specific embodiments. Brief Description of the Drawings
[0023] Figure 1 is the overall schematic diagram of the present utility model;
[0024] Figure 2 is the side schematic diagram of the present utility model;
[0025] Figure 3 is the structural schematic diagram of the substrate;
[0026] Figure 4 is the structural schematic diagram of the upper cover;
[0027] Figure 5 is the structural schematic diagram of the balance frame;
[0028] Figure 6 is the partial structural schematic diagram when the second balance frame limit hole and the first balance frame limit hole are M-shaped;
[0029] Figure 7 is the structural schematic diagram when pressing when the second balance frame limit hole and the first balance frame limit hole are M-shaped;
[0030] Figure 8 Schematic diagram of the internal structure when the second balance frame limiting hole and the first balance frame limiting hole are in an M shape and are pressed
[0031] Figure 9 Side schematic view when the second balance frame limiting hole and the first balance frame limiting hole are in a gourd shape
[0032] Figure 10 Partial schematic diagram of the structure when the second balance frame limiting hole and the first balance frame limiting hole are in a gourd shape and are pressed
[0033] Figure 11 Schematic diagram of the structure when the second balance frame limiting hole and the first balance frame limiting hole are in a gourd shape and are pressed
[0034] Figure 12 Schematic diagram of the internal structure when the second balance frame limiting hole and the first balance frame limiting hole are in a gourd shape and are pressed
[0035] Figure 13 Side schematic view when the second balance frame limiting hole and the first balance frame limiting hole are in a circular shape
[0036] Figure 14 Partial schematic diagram of the structure when the second balance frame limiting hole and the first balance frame limiting hole are in a circular shape
[0037] In the figure: 1. Substrate; 11. Second balance frame limiting hole; 2. Balance frame body; 21. Upper limiting block; 22. Lower limiting block; 23. Rotating shaft; 24. Rotating limiting hole; 3. Upper cover; 31. First balance frame limiting hole; 32. First balance frame guiding column. Specific implementation manner
[0038] In order to further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined purpose, the following details the specific implementation manner of the present utility model in conjunction with the accompanying drawings and preferred embodiments.
[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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, and therefore should not be construed as a limitation to the present utility model.
[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, 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 of" means two or more, unless otherwise specifically defined.
[0041] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed", etc. should 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 communication inside 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.
[0042] Please refer to Figures 1 to 14 , an embodiment of the present utility model provides a limit structure for the balance frame of an ultra-thin keyboard switch, including a substrate 1, a balance frame body 2 rotatably arranged on the substrate 1, and an upper cover 3 arranged on the balance frame body 2. First balance frame limit holes 31 for the upper part of the balance frame body 2 to be embedded and rotated are respectively formed on both sides of the upper cover 3, and second balance frame limit holes 11 for the lower part of the balance frame body 2 to be embedded and rotated are respectively formed on both sides of the substrate 1. The first balance frame limit holes 31 are in an M shape, a gourd shape, or a circular shape, the second balance frame limit holes 11 are in an M shape, a gourd shape, or a circular shape, and the shapes of the first balance frame limit holes 31 and the second balance frame limit holes 11 can be freely combined.
[0043] By setting the limit mechanism to include a substrate 1, a balance frame body 2 rotatably arranged on the substrate 1, and an upper cover 3 arranged on the balance frame, first balance frame limit holes 31 for the upper part of the balance frame body 2 to be embedded and rotated are respectively formed on both sides of the upper cover 3, and second balance frame limit holes 11 for the lower part of the balance frame body 2 to be embedded and rotated are respectively formed on both sides of the substrate 1. The upper part of the balance frame body 2 is embedded in the first balance frame limit holes 31, and the lower part of the balance frame is embedded in the second balance frame limit holes 11, thereby completing the installation of the balance frame body 2 on the substrate 1 and the installation of the upper cover 3 on the balance frame. Its structure is simple, the assembly is convenient, and it is beneficial to improve production efficiency.
[0044] For the specific manner in which the balance frame body 2 rotates by corresponding embedding in the first balance frame limit holes 31 and the second balance frame limit holes 11, such as Figures 1 to 14As shown, an upper limit block 21 for rotating by being embedded in the first balance frame limit hole 31 is formed on the upper part of the balance frame body 2, and a lower limit block 22 for rotating by being embedded in the second balance frame limit hole 11 is formed on the lower part of the balance frame body 2. The upper limit block 21 rotates by being embedded in the first balance frame limit hole 31, and the lower limit block 22 rotates by being embedded in the second balance frame limit hole 11. The two cooperate with each other so that the balance frame body 2 is arranged between the substrate 1 and the upper cover 3. After being stressed, the balance frame body 2 operates stably with uniform stress, improving the transmission performance of the balance frame body 2 and ensuring the service life of the key switch.
[0045] Preferably, as Figures 1 to 14 shown, both the upper limit block 21 and the lower limit block 22 are flat and long strips, and the flat and long strip shape is more suitable for the stamping process. The production cost of stamping metal materials is lower and the production efficiency is higher.
[0046] As Figures 1 to 14 shown, by making the first balance frame limit hole 31 be M-shaped or gourd-shaped or circular, and the second balance frame limit hole 11 be M-shaped or gourd-shaped or circular, the shapes of the first balance frame limit hole 31 and the second balance frame limit hole 11 can be freely combined. The M-shaped or gourd-shaped shape cooperates with the flat and long strip-shaped upper limit block 21 and lower limit block 22 to provide a fulcrum for the rotation of the upper limit block 21 and the lower limit block 22. The circular shape is tangent to the upper limit block 21 and the lower limit block 22 respectively, so that the upper limit block 21 and the lower limit block 22 rotate more flexibly and provide a sense of rotation when pressing. While reducing the overall height of the switch, the flexibility of the balance frame body 2 can be ensured, improving people's use experience. Different shapes can be selected according to the actual situation, so that the key switch can have different flexibilities and different feelings when pressing, meeting different requirements and improving the practicality of the key switch.
[0047] Specifically, as one of the solutions, as Figures 6 to 8As shown, the first balance frame limiting hole 31 is M-shaped, with a concave side at the lower end and a convex middle. The upper limiting block 21 rotates with the convex middle position of the first balance frame limiting hole 31 as the rotation fulcrum. When the balance frame body 2 moves downward, the upper limiting block 21 rotates with the convex middle position of the first balance frame limiting hole 31 as the rotation fulcrum, and the outer side of the upper limiting block 21 turns into the concave position outside the first balance frame limiting hole 31 or the upper limiting block 21 is horizontally level in the first balance frame limiting hole 31. When the balance frame body 2 moves upward, the upper limiting block 21 rotates with the convex middle position of the first balance frame limiting hole 31 as the rotation fulcrum, and the inner side of the upper limiting block 21 turns into the concave position inside the first balance frame limiting hole 31. The two cooperate with each other, thereby giving the user a tactile feeling when pressing. And through the convex structure in the middle of the first balance frame limiting hole 31, while restricting the rotation position of the upper limiting block 21, it also ensures the flexibility of the rotation of the upper limiting block 21, improving people's use experience.
[0048] Preferably, as Figure 7 shown, a first balance frame guiding column 32 that protrudes downward and is overall semi-circular is formed at the position between the two groups of first balance frame limiting holes 31 of the upper cover 3. The upper limiting block 21 rotates with the convex middle position of the first balance frame limiting hole 31 and the first balance frame guiding column 32 as the rotation fulcrums. The middle part of the upper end of the upper limiting block 21 is pushed up by the semi-circular shape, so that the upper limiting block 21 can rotate more easily in the first balance frame limiting hole 31, further improving the flexibility of the rotation of the upper limiting block 21 and enhancing people's use experience.
[0049] As another solution, as Figures 9 to 12As shown, the first balance frame limiting hole 31 is gourd-shaped, with the sides of its upper and lower ends being recessed outward and the middle parts being convex inward. The upper limiting block 21 rotates with the middle convex positions of the upper and lower ends as the rotation fulcrums. When the balance frame body 2 moves downward, the upper limiting block 21 takes the middle convex positions of the upper and lower ends of the first balance frame limiting hole 31 as the rotation fulcrums. The outer side of the upper limiting block 21 rotates into the recessed position on the outer side of the lower end of the first balance frame limiting hole 31, and the inner side of the upper limiting block 21 rotates into the recessed position on the inner side of the upper end of the first balance frame limiting hole 31. Or the upper limiting block 21 is in a horizontally balanced state within the first balance frame limiting hole 31. When the balance frame body 2 moves upward, the upper limiting block 21 takes the middle convex positions of the upper and lower ends of the first balance frame limiting hole 31 as the rotation fulcrums. The inner side of the upper limiting block 21 rotates into the recessed position on the inner side of the lower end of the first balance frame limiting hole 31, and the outer side of the upper limiting block 21 rotates into the recessed position on the outer side of the upper end of the first balance frame limiting hole 31. The two cooperate with each other to give the user a tactile sensation when pressing. And through the structure with the middle parts of both the upper and lower ends of the first balance frame limiting hole 31 being convex, while restricting the rotation position of the upper limiting block 21, it also ensures the flexibility of the rotation of the upper limiting block 21, improving people's usage experience.
[0050] As another solution, as Figures 13 to 14 shown, the first balance frame limiting hole 31 is circular. The upper limiting block 21 is tangent to the circular first balance frame limiting hole 31, so that when the upper limiting block 21 on the first balance frame rotates, it is guided and limited by the circular first balance frame limiting hole 31. The circular hole structure is conducive to the rotation of the upper limiting block 21, improving the flexibility of the rotation of the upper limiting block 21, and thus improving people's usage experience.
[0051] As one solution, as Figures 6 to 8As shown, the second balance frame limiting hole 11 is in an "M" shape, with its upper side concave and the middle convex. The lower limiting block 22 rotates with the middle convex position of the second balance frame limiting hole 11 as the rotation fulcrum. When the balance frame body 2 moves downward, the lower limiting block 22 rotates with the middle convex position of the second balance frame limiting hole 11 as the rotation fulcrum, and the outer side of the lower limiting block 22 turns into the concave position outside the second balance frame limiting hole 11, or the lower limiting block 22 is in a horizontal state in the second balance frame limiting hole 11. When the balance frame body 2 moves upward, the lower limiting block 22 rotates with the middle convex position of the second balance frame limiting hole 11 as the rotation fulcrum, and the inner side of the lower limiting block 22 turns into the concave position inside the second balance frame limiting hole 11. The two cooperate with each other to give the user a feeling of pressing. And through the structure with the middle convex in the second balance frame limiting hole 11, while restricting the rotation position of the lower limiting block 22, it also ensures the flexibility of the rotation of the lower limiting block 22, improving people's use experience.
[0052] As another solution, as Figures 9 to 12 shown, the second balance frame limiting hole 11 is in a gourd shape, with the sides of its upper and lower ends concave and the middle of both upper and lower ends convex. The lower limiting block 22 rotates with the middle convex positions of the upper and lower ends as the rotation fulcrums. When the balance frame body 2 moves downward, the lower limiting block 22 rotates with the middle convex positions of the upper and lower ends of the second balance frame limiting hole 11 as the rotation fulcrums. The outer side of the lower limiting block 22 turns into the concave position inside the lower end of the second balance frame limiting hole 11, and the inner side of the lower limiting block 22 turns into the concave position inside the upper end of the second balance frame limiting hole 11, or the lower limiting block 22 is in a horizontal state in the second balance frame limiting hole 11. When the balance frame body 2 moves upward, the lower limiting block 22 rotates with the middle convex positions of the upper and lower ends of the second balance frame limiting hole 11 as the rotation fulcrums. The inner side of the lower limiting block 22 turns into the concave position inside the upper end of the second balance frame limiting hole 11, and the outer side of the lower limiting block 22 turns into the concave position outside the lower end of the second balance frame limiting hole 11. The two cooperate with each other to give the user a feeling of pressing. And through the structure with the middle convex at both the upper and lower ends of the second balance frame limiting hole 11, while restricting the rotation position of the lower limiting block 22, it also ensures the flexibility of the rotation of the lower limiting block 22, improving people's use experience.
[0053] As another solution, as Figures 13 to 14As shown, the second balance frame limiting hole 11 is circular. The lower limiting block 22 is tangent to the circular first balance frame limiting hole 31, so that when the lower limiting block 22 rotates, it is guided and limited by the circular first balance frame limiting hole 31. The circular hole structure is conducive to the rotation of the lower limiting block 22, improving the flexibility of the rotation of the lower limiting block 22, and thus improving people's use experience.
[0054] The number of the second balance frame limiting holes 11 and the first balance frame limiting holes 31 can be set according to actual situations. For example, there are a total of 4 groups of the second balance frame limiting holes 11, so that the 4 corners of the substrate 1 are stressed evenly. Or there are only 2 groups of the second balance frame limiting holes 11 on both sides at one end, and the other side is hinged. It can be selected according to actual situations, so no specific limitation is made in this embodiment.
[0055] Regarding the specific operation mode of the balance frame body 2 itself, such as Figure 5 , Figure 6 , Figure 10 and Figure 14 As shown, the balance frame body 2 includes two groups of brackets that are cross-connected but can be overlapped and pivotally connected together. A rotating shaft 23 is formed in the middle of any one of the two groups of brackets, and a rotating limiting hole 24 for the rotating shaft 23 to be embedded and rotated is formed in the middle of the other group of brackets. When installation is required, only by aligning the rotating shaft 23 with the rotating limiting hole 24 and embedding it, the pivotal connection of the two groups of brackets can be achieved. The overall structure is simple, the installation is convenient, and it is conducive to production.
[0056] Preferably, as Figure 10As shown, the rotating shaft 23 is in the shape of a flat strip, and the rotating limit hole 24 is overall in the shape of a gourd. The sides at the upper and lower ends are both recessed outward, and the middle parts are both convex inward. When an external force is applied downward, the rotating shaft 23 takes the middle convex positions at the upper and lower ends of the rotating limit hole 24 as the rotation fulcrums. The side of the rotating shaft 23 close to the second balance frame limit hole 11 is embedded in the recessed position at the upper end of the side of the rotating limit hole 24 close to the second balance frame limit hole 11, and the side of the rotating shaft 23 far from the second balance frame limit hole 11 is embedded in the recessed position at the lower end of the side of the rotating limit hole 24 far from the second balance frame limit hole 11. Or the rotating shaft 23 is in a horizontally flat state in the rotating limit hole 24, so that the two groups of brackets can move downward normally. When the external force is removed, the rotating shaft 23 takes the middle convex positions at the upper and lower ends of the rotating limit hole 24 as the rotation fulcrums. The side of the rotating shaft 23 close to the second balance frame limit hole 11 is embedded in the recessed position at the lower end of the side of the rotating limit hole 24 close to the second balance frame limit hole 11, and the side of the rotating shaft 23 far from the second balance frame limit hole 11 is embedded in the recessed position at the upper end of the side of the rotating limit hole 24 far from the second balance frame limit hole 11. The two cooperate with each other to give the user a feel when pressing. And through the structure with convex middle parts at both the upper and lower ends of the rotating limit hole 24, while restricting the rotation position of the rotating shaft 23, it also ensures the flexibility of the rotation of the rotating shaft 23, improving people's use experience.
[0057] As another preferred solution, as Figure 5 , Figure 6 and Figure 14 shown, the rotating shaft 23 is in the shape of a flat strip, the rotating limit hole 24 is overall circular, and the rotating shaft 23 is tangent to the circular rotating limit hole 24. Thus, when the rotating shaft 23 rotates, it is guided and limited by the circular rotating limit hole 24. The circular hole structure is conducive to the rotation of the rotating shaft 23, improving the flexibility of the rotation of the rotating shaft 23, and thus improving people's use experience.
[0058] It should be noted here that the ultra-thin keyboard switch balance frame limit 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 key switches 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.
[0059] As described above, it is only the preferred embodiment of the present utility model, and does not impose any limitation on the technical scope of the present utility model. Therefore, other structures obtained by adopting technical features that are the same as or similar to those of the above-mentioned embodiment of the present utility model are all within the protection scope of the present utility model.
Claims
1. An ultra-thin keyboard switch balance frame limiting structure, comprising a substrate, a balance frame body rotatably arranged on the substrate, and an upper cover arranged on the balance frame body, characterized in that: On both sides of the upper cover, there are respectively formed first balance frame limiting holes for the upper part of the balance frame body to be embedded and rotated. On both sides of the substrate, there are respectively formed second balance frame limiting holes for the lower part of the balance frame body to be embedded and rotated. The first balance frame limiting holes are in the shape of M, gourd or circle. The second balance frame limiting holes are in the shape of M, gourd or circle. The shapes of the first balance frame limiting holes and the second balance frame limiting holes can be freely combined.
2. The limiting structure of the balance frame of the ultra-thin keyboard switch according to claim 1, characterized in that: On the upper part of the balance frame body, there is formed an upper limiting block that is embedded in the first balance frame limiting hole for rotation. On the lower part of the balance frame body, there is formed a lower limiting block that is embedded in the second balance frame limiting hole for rotation.
3. The limit structure of the balance frame of the ultra-thin keyboard switch according to claim 2, characterized in that: Both the upper limiting block and the lower limiting block are flat and long strip-shaped.
4. The limiting structure of the balance frame of the ultra-thin keyboard switch according to claim 3, characterized in that: The first balance frame limiting hole is in the shape of M, with the side at the lower end sunken and the middle protruding. The upper limiting block rotates with the position of the middle protrusion of the first balance frame limiting hole as the rotation fulcrum.
5. The limit structure of the balance frame of the ultra-thin keyboard switch according to claim 4, characterized in that: At the position between the two groups of first balance frame limiting holes on the upper cover, there is formed a first balance frame guiding column that protrudes downward and is overall semi-circular in shape. The upper limiting block rotates with the position of the middle protrusion of the first balance frame limiting hole and the first balance frame guiding column as the rotation fulcrums.
6. The limit structure of the balance frame of the ultra-thin keyboard switch according to claim 3, wherein: The first balance frame limiting hole is in the shape of gourd, with the sides at the upper and lower ends sunken outward and the middle protruding inward. The upper limiting block rotates with the positions of the middle protrusions at the upper and lower ends as the rotation fulcrums.
7. The limiting structure of the balance frame of the ultra-thin keyboard switch according to claim 3, characterized in that: The first balance frame limiting hole is circular, and the upper limiting block is tangent to the circular first balance frame limiting hole.
8. The limiting structure of the balance frame of the ultra-thin keyboard switch according to claim 3, wherein: The second balance frame limiting hole is in the shape of M, with the side at the upper end sunken and the middle protruding. The lower limiting block rotates with the position of the middle protrusion of the second balance frame limiting hole as the rotation fulcrum.
9. The limiting structure of the balance frame of the ultra-thin keyboard switch according to claim 3, characterized in that: The second balance frame limiting hole is in the shape of gourd, with the sides at the upper and lower ends sunken outward and the middle protruding inward. The lower limiting block rotates with the positions of the middle protrusions at the upper and lower ends as the rotation fulcrums.
10. The ultra-thin keyboard switch balance bracket limit structure according to claim 3, characterized in that: The second balance frame limiting hole is circular, and the lower limiting block is tangent to the circular first balance frame limiting hole.
11. The limiting structure of the balance frame of the ultra-thin keyboard switch according to claim 1, characterized in that: The balance frame body includes two groups of brackets that are cross-connected and pivotally connected to each other in a stackable manner. In the middle of any one of the two groups of brackets, there is formed a rotating shaft, and in the middle of the other group of brackets, there is formed a rotating limiting hole for the rotating shaft to be embedded and rotated.
12. The limit structure of the balance frame of the ultra-thin keyboard switch according to claim 11, wherein: The rotating shaft is flat and long strip-shaped. The rotating limiting hole is overall in the shape of gourd, with the sides at the upper and lower ends sunken outward and the middle protruding inward.
13. The limiting structure of the balance frame of the ultra-thin keyboard switch according to claim 11, characterized in that: The rotating shaft is flat and long strip-shaped. The rotating limiting hole is overall circular, and the rotating shaft is tangent to the circular rotating limiting hole.