Ultra-thin keyboard switch balancing stand installation structure

Abstract

The utility model discloses an ultrathin keyboard switch balancing stand mounting structure, which comprises a substrate, a first metal balancing stand, a second metal balancing stand, a balancing stand reset elastic body, an upper cover and a key reset elastic body, second balance frame upper limiting blocks embedded into the second metal balance frame are arranged on the two sides of one end of the upper cover respectively, and second balance frame upper limiting holes allowing the second balance frame upper limiting blocks to be embedded are formed in the two sides of one end of the second metal balance frame respectively. The balancing stand and the fixing structure thereof are manufactured by adopting a stamping process of a metal plate, the compressive strength of a metal material is high, the overall height can be effectively reduced by matching with other structures, the light and thin effect is achieved, and compared with the existing CNC (Computer Numerical Control) machining, the stamping process is high in production efficiency and low in cost, and the balancing stand is simple in overall structure, convenient and fast to install and beneficial to production.

Description

Technical Field

[0001] The utility model relates to the technical field of key switches, in particular to an installation structure of a balance frame for 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 systematically 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, and for this reason, the keyboards on them are also getting thinner and lighter. Currently, the single key switches in the keyboards used on notebook computers use plastic balance frames inside. The strength of the plastic is limited. In order to ensure the normal use of the balance frame, the plastic balance frame can only be set to have a larger thickness and a higher height, so as to ensure that the plastic will not break during use. This results in that the height of the keyboard of the notebook computer is affected by the height of the plastic balance frame and cannot be made thinner and lighter any further, which cannot meet the current people's demand for the thinness and lightness of notebooks. Moreover, the existing processing technology of the balance frame is complex, with high cost and low efficiency, and the installation structure is complex, which is not conducive to production. Summary of the Utility Model

[0004] In view of the above deficiencies, the purpose of the present utility model is to provide an installation structure of a balance frame for an ultra-thin keyboard switch, which uses a stamping process of a metal plate to manufacture the balance frame and its fixing structure. The metal material has a large compressive strength, and with other structures, the overall height can be effectively reduced to achieve the effect of thinness and lightness. The stamping process has higher production efficiency and lower cost than the existing CNC machining. Its overall structure is simple, the installation is convenient, and it is conducive to production.

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

[0006] An installation structure of a balance frame for an ultra-thin keyboard switch, comprising a substrate, a first metal balance frame rotatably arranged on the substrate, a second metal balance frame rotatably arranged on the substrate, a balance frame reset elastic body sleeved between the first metal balance frame and the second metal balance frame, an upper cover arranged on the first metal balance frame and the second metal balance frame, and a key reset elastic body arranged between the substrate and the upper cover. The first metal balance frame and the second metal balance frame cross each other and are pivotally connected together in a superposable manner. On both sides of one end of the upper cover, there are respectively arranged second balance frame upper limit blocks embedded in the second metal balance frame, and on both sides of one end of the second metal balance frame, there are respectively formed second balance frame upper limit holes for the second balance frame upper limit blocks to be embedded.

[0007] As a further improvement of the present utility model, on both sides of the other end of the upper cover, first upper limiting holes for the first metal balance bracket to be embedded are respectively formed, and on both sides of one end of the first metal balance bracket, first upper limiting blocks embedded in the first upper limiting holes are respectively formed.

[0008] As a further improvement of the present utility model, on both sides of the other end of the second metal balance bracket, second lower limiting blocks embedded in the substrate are respectively formed, and on one end of the substrate, a second lower limiting hole for the second lower limiting block to be embedded is formed.

[0009] As a further improvement of the present utility model, on both sides of the other end of the first metal balance bracket, first lower limiting blocks embedded in the substrate are respectively formed, and on the other end of the substrate, a first lower limiting hole for the first lower limiting block to be embedded is formed.

[0010] As a further improvement of the present utility model, the second metal balance bracket includes a second balance bracket plate body rotatably arranged on the substrate and a second balance bracket extension plate formed at one end of the second balance bracket plate body and extending upward. The second upper limiting hole is arranged at one end of the second balance bracket plate body or on the second balance bracket extension plate or at the connection between the second balance bracket plate body and the second balance bracket extension plate.

[0011] As a further improvement of the present utility model, the second upper limiting block is integrally L-shaped, and its horizontal part is hooked on the second upper limiting hole.

[0012] As a further improvement of the present utility model, the first upper limiting block is flat and long strip-shaped, the lower part of the first upper limiting hole is W-shaped, with its lower side edges sunken and the middle protruding.

[0013] As a further improvement of the present utility model, the first upper limiting block is flat and long strip-shaped, the first upper limiting hole is integrally gourd-shaped, with the side edges of its upper end and lower end both sunken outward and the middle both protruding inward.

[0014] As a further improvement of the present utility model, the first upper limiting block is flat and long strip-shaped, the first upper limiting hole is integrally circular, and the first upper limiting block is tangent to the circular first upper limiting hole.

[0015] As a further improvement of the present utility model, the second lower limiting block is flat and long strip-shaped, the lower part of the second lower limiting hole is M-shaped, with its upper side edges protruding and the middle sunken.

[0016] As a further improvement of the present utility model, the lower limit block of the second balance frame is in a flat strip shape, and the overall shape of the lower limit hole of the second balance frame is gourd-shaped, with the sides of its upper end and lower end being recessed outward and the middle parts being convex inward.

[0017] As a further improvement of the present utility model, the lower limit block of the second balance frame is in a flat strip shape, the overall shape of the lower limit hole of the second balance frame is circular, and the lower limit block of the second balance frame is tangent to the circular lower limit hole of the second balance frame.

[0018] As a further improvement of the present utility model, the lower limit block of the first balance frame is in a flat strip shape, the lower part of the lower limit hole of the first balance frame is M-shaped, with the side of its upper end being convex and the middle part being recessed.

[0019] As a further improvement of the present utility model, the lower limit block of the first balance frame is in a flat strip shape, the overall shape of the lower limit hole of the first balance frame is gourd-shaped, with the sides of its upper end and lower end being recessed outward and the middle parts being convex inward.

[0020] As a further improvement of the present utility model, the lower limit block of the first balance frame is in a flat strip shape, the overall shape of the lower limit hole of the first balance frame is circular, and the lower limit block of the first balance frame is tangent to the circular lower limit hole of the first balance frame.

[0021] As a further improvement of the present utility model, a rotating shaft is formed in the middle of the first metal balance frame and is embedded in the second metal balance frame, and a rotating limit hole for the rotating shaft to be embedded and rotate is formed in the middle of the second metal balance frame.

[0022] As a further improvement of the present utility model, the rotating shaft is in a flat strip shape, the overall shape of the rotating limit hole is gourd-shaped, with the sides of its upper end and lower end being recessed outward and the middle parts being convex inward.

[0023] As a further improvement of the present utility model, the rotating shaft is in a flat strip shape, the overall shape of the rotating limit hole is circular, and the rotating shaft is tangent to the circular rotating limit hole.

[0024] The beneficial effects of the present utility model are:

[0025] By setting the present installation structure to include a substrate, a first metal balance bracket rotatably arranged on the substrate, a second metal balance bracket rotatably arranged on the substrate, a balance bracket return elastic body sleeved between the first metal balance bracket and the second metal balance bracket, an upper cover arranged on the first metal balance bracket and the second metal balance bracket, and a key return elastic body arranged between the substrate and the upper cover, the first metal balance bracket and the second metal balance bracket cross each other and are pivotally connected together in a superposable manner. On both sides of one end of the upper cover, second balance bracket upper limit blocks embedded in the second metal balance bracket are respectively arranged, and on both sides of one end of the second metal balance bracket, second balance bracket upper limit holes for the second balance bracket upper limit blocks to be embedded are respectively formed. The present installation structure uses the stamping process of metal plates to manufacture balance brackets, upper covers, substrates, etc. The metal material has a large compressive strength. Combined with other structures, the overall height can be effectively reduced to achieve a thin and light effect. The stamping process has a higher production efficiency and lower cost than the existing CNC machining. When assembly is required, only the second balance bracket upper limit blocks need to be aligned with the second balance bracket upper limit holes and embedded. Its overall structure is simple, the installation is convenient, and it is beneficial to production.

[0026] 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

[0027] Figure 1 is the overall schematic diagram of the present utility model;

[0028] Figure 2 is the side schematic diagram of the present utility model;

[0029] Figure 3 is the structural schematic diagram of the upper cover;

[0030] Figure 4 is the structural schematic diagram of the second metal balance bracket;

[0031] Figure 5 is the structural schematic diagram of the first metal balance bracket;

[0032] Figure 6 is the structural schematic diagram of the substrate;

[0033] Figure 7 is the structural schematic diagram in which the second balance bracket lower limit hole, the first balance bracket lower limit hole is W-shaped, and the second balance bracket upper limit hole is M-shaped;

[0034] Figure 8 is the schematic diagram when the second balance bracket lower limit hole, the first balance bracket lower limit hole is W-shaped, and the second balance bracket upper limit hole is M-shaped is pressed;

[0035] Figure 9Schematic diagram of the internal structure when pressing, where the lower limit hole of the second balance bracket, the lower limit hole of the first balance bracket is W-shaped, and the upper limit hole of the second balance bracket is M-shaped;

[0036] Figure 10 Schematic diagram where the lower limit hole of the second balance bracket, the lower limit hole of the first balance bracket, and the upper limit hole of the second balance bracket are gourd-shaped;

[0037] Figure 11 Schematic diagram of the internal structure when pressing, where the lower limit hole of the second balance bracket, the lower limit hole of the first balance bracket, and the upper limit hole of the second balance bracket are gourd-shaped;

[0038] Figure 12 Schematic diagram when pressing, where the lower limit hole of the second balance bracket, the lower limit hole of the first balance bracket, and the upper limit hole of the second balance bracket are gourd-shaped;

[0039] Figure 13 Schematic diagram of the internal structure when pressing, where the lower limit hole of the second balance bracket, the lower limit hole of the first balance bracket, and the upper limit hole of the second balance bracket are gourd-shaped;

[0040] Figure 14 Schematic diagram where the lower limit hole of the second balance bracket, the lower limit hole of the first balance bracket, and the upper limit hole of the second balance bracket are circular;

[0041] Figure 15 Schematic diagram of the internal structure when the lower limit hole of the second balance bracket, the lower limit hole of the first balance bracket, and the upper limit hole of the second balance bracket are circular;

[0042] In the figure: 1. Substrate; 11. Lower limit hole of the second balance bracket; 12. Lower limit hole of the first balance bracket; 2. First metal balance bracket; 21. Upper limit block of the first balance bracket; 22. Lower limit block of the first balance bracket; 23. Rotating shaft; 3. Second metal balance bracket; 31. Plate body of the second balance bracket; 32. Extension plate of the second balance bracket; 33. Lower limit block of the second balance bracket; 34. Upper limit hole of the second balance bracket; 35. Rotation limit hole; 4. Balance bracket reset elastic body; 5. Upper cover; 51. Upper limit block of the second balance bracket; 52. Upper limit hole of the first balance bracket; 53. Guide post of the first balance bracket; 6. Button reset elastic body. Detailed implementation mode

[0043] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined purpose, the following provides a detailed description of the specific implementation mode of the present invention in combination with the attached drawings and preferred embodiments.

[0044] 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 drawings. It 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. Therefore, it should not be construed as a limitation to the present utility model.

[0045] 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, the meaning of "a plurality of" is two or more unless otherwise specifically defined.

[0046] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "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 internal communication of two elements or the interaction relationship between two elements. 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.

[0047] Please refer to Figures 1 to 15 , an installation structure of a balance bracket for an ultra-thin keyboard switch provided by an embodiment of the present utility model includes a base plate 1, a first metal balance bracket 2 rotatably arranged on the base plate 1, a second metal balance bracket 3 rotatably arranged on the base plate 1, a balance bracket return elastic body 4 sleeved between the first metal balance bracket 2 and the second metal balance bracket 3, an upper cover 5 arranged on the first metal balance bracket 2 and the second metal balance bracket 3, and a key return elastic body 6 arranged between the base plate 1 and the upper cover 5. The first metal balance bracket 2 and the second metal balance bracket 3 cross each other and are pivotally connected together in a superposable manner. On both sides of one end of the upper cover 5, there are respectively arranged second balance bracket upper limit blocks 51 embedded in the second metal balance bracket 3, and on both sides of one end of the second metal balance bracket 3, there are respectively formed second balance bracket upper limit holes 34 for the second balance bracket upper limit blocks 51 to be embedded.

[0048] This installation structure uses the stamping process of metal sheets to manufacture the balance frame, the upper cover 5, the base plate 1, etc. The metal material has a high compressive strength. Combined with other structures, it can effectively reduce the overall height and achieve a thin and light effect. The stamping process has higher production efficiency and lower cost than the existing CNC machining. When assembly is required, only the upper limit block 51 of the second balance frame needs to be aligned with the upper limit hole 34 of the second balance frame and embedded. Its overall structure is simple, the installation is convenient, and it is conducive to production.

[0049] The base plate 1 is installed on the circuit board of the keyboard. When an external force presses the upper cover 5, the upper limit block 51 of the second balance frame on the upper cover 5 is embedded into the upper limit hole 34 of the second balance frame, thereby driving the second metal balance frame 3 to move downward. Since the first metal balance frame 2 and the second metal balance frame 3 cross each other and are pivotally connected together in a superposable manner, the second metal balance frame 3 synchronously drives the first metal balance frame 2 to move downward, and pulls and deforms the balance frame reset elastic body 4 and presses the key reset elastic body 6 of the upper cover 5 to compress and deform the key reset elastic body 6. After the key switch moves downward in multiple angles and aspects in a balanced manner, the conduction component in the key switch is conducted, and a signal is output outward, which is conducive to the cooperation between components. When the external force is removed from the upper cover 5, the balance frame reset elastic body 4 and the key reset elastic body 6 are respectively reset under their own elastic restoring forces. The balance frame reset elastic body 4 contracts to pull up the first metal balance frame 2 and the second metal balance frame 3, and the key reset elastic body 6 jacks up upward. The cooperation of several of them jacks up the upper cover 5 to reset, disconnects the conduction between the conduction components, and waits for the next use.

[0050] For the specific structural settings of the above conduction components, the conduction components can be conduction structures such as mechanical elastic sheet conduction, light conduction, magnetic axis conduction, magnetic induction conduction, etc. These conduction structures are all conventional technical means in the art, so they will not be specifically described in this embodiment.

[0051] Preferably, as Figure 7 shown, the balance frame reset elastic body 4 is a tension spring. The tension spring has a high elastic coefficient, can quickly return to its original state after being stressed, has a good elastic restoring force, its manufacturing cost is relatively low, effectively reduces the production cost of this installation structure, and the shape and size of the tension spring can be made according to actual needs, is easy to install and replace, improves the assembly and installation efficiency of this installation structure, is supported by a metal material, has a high strength, and is conducive to making a thin and light key switch.

[0052] Preferably, as Figure 1As shown, the key reset elastomer 6 is a spring. The spring has good elastic performance, can quickly return to its original state after being stressed, has good elastic restoring force, its manufacturing cost is relatively low, effectively reducing the production cost of this installation structure, and the spring has good buffering effect, can absorb and relieve impact and vibration, effectively ensuring the service life of this installation structure.

[0053] Preferably, in order to make the upper cover 5 better transmit the external force for pressing, as Figures 1 to 3 、 Figure 5 、 Figures 7 to 15 shown, on both sides of the other end of the upper cover 5, first balance frame upper limit holes 52 for embedding the first metal balance frame 2 are respectively formed. On both sides of one end of the first metal balance frame 2, first balance frame upper limit blocks 21 for embedding into the first balance frame upper limit holes 52 are respectively formed. When assembly is required, only need to align the first balance frame upper limit blocks 21 with the first balance frame upper limit holes 52 and embed them. Its overall structure is simple, the installation is convenient, which is beneficial to production.

[0054] When an external force presses the upper cover 5, the upper cover 5 drives the second metal balance frame 3 to press down, and the upper cover 5 presses down the first balance frame upper limit blocks 21 through the first balance frame upper limit holes 52. At the same time, the first balance frame upper limit blocks 21 rotate on the first balance frame upper limit holes 52, so as to realize that the upper cover 5 drives the first metal balance frame 2 to move down normally. The first metal balance frame 2 and the second metal balance frame 3 cooperate with each other, so that no matter which position of the upper cover 5 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 leaves the upper cover, the balance frame reset elastomer 4 and the key reset elastomer 6 respectively reset under their own elastic restoring forces. The balance frame reset elastomer 4 contracts to pull up the first metal balance frame 2 and the second metal balance frame 3, the key reset elastomer 6 jacks up upward, and the first balance frame upper limit blocks 21 rotate on the first balance frame upper limit holes 52. The cooperation of several parts jacks up the upper cover 5 to reset, disconnecting the conduction between the conduction components and waiting for the next use.

[0055] Regarding the specific way of arranging the second metal balance frame 3 on the substrate 1, as Figures 1 to 2 、 Figure 4 、 Figure 6 、 Figures 7 to 15As shown, on both sides of the other end of the second metal balance bracket 3, second balance bracket lower limit blocks 33 are respectively formed and embedded in the substrate 1, and at one end of the substrate 1, a second balance bracket lower limit hole 11 for embedding the second balance bracket lower limit blocks 33 is formed. When assembly is required, only by aligning the second balance bracket lower limit blocks 33 with the second balance bracket lower limit holes 11 and embedding them can it be achieved. Its overall structure is simple, the installation is convenient, which is conducive to production. The substrate 1 is arranged on the circuit board of the keyboard, so that the second metal balance bracket 3 is restricted on the substrate 1 to ensure the normal operation of the second metal balance bracket 3. And during the process of the second metal balance bracket 3 moving downward or moving upward and resetting, it rotates in the second balance bracket lower limit holes 11, thereby ensuring the flexibility of the second metal balance bracket 3.

[0056] Regarding the specific manner in which the first metal balance bracket 2 is arranged on the substrate 1, as Figures 1 to 3 , Figure 5 , Figures 7 to 15 shown, on both sides of the other end of the first metal balance bracket 2, first balance bracket lower limit blocks 22 are respectively formed and embedded in the substrate 1, and at the other end of the substrate 1, a first balance bracket lower limit hole 12 for embedding the first balance bracket lower limit blocks 22 is formed. When assembly is required, only by aligning the first balance bracket lower limit blocks 22 with the first balance bracket lower limit holes 12 and embedding them can it be achieved. Its overall structure is simple, the installation is convenient, which is conducive to production. The substrate 1 is arranged on the circuit board of the keyboard, so that the first metal balance bracket 2 is restricted on the substrate 1 to ensure the normal operation of the first metal balance bracket 2. And during the process of the first metal balance bracket 2 moving downward or moving upward and resetting, it rotates in the first balance bracket lower limit holes 12, thereby ensuring the flexibility of the first metal balance bracket 2.

[0057] Regarding the specific structural arrangement of the second metal balance bracket 3, as Figure 1 and Figure 4 shown, the second metal balance bracket 3 includes a second balance bracket plate body 31 rotatably arranged on the substrate 1, and a second balance bracket extension plate 32 formed at one end of the second balance bracket plate body 31 and extending upward. The second balance bracket lower limit blocks 33 are arranged on both sides of one end of the second balance bracket plate body 31. The second balance bracket upper limit holes 34 are arranged at one end of the second balance bracket plate body 31 or on the second balance bracket extension plate 32 or at the connection between the second balance bracket plate body 31 and the second balance bracket extension plate 32, and its specific arrangement can be determined according to the actual situation, so no specific limitation is made in this embodiment.

[0058] Regarding the specific manner in which the second balance bracket upper limit block 51 is installed on the second balance bracket upper limit hole 34, as Figure 1 and Figure 3As shown in the figure, the upper limit block 51 of the second balance bracket is integrally L-shaped. Its horizontal part is hooked on the upper limit hole 34 of the second balance bracket, so that the upper cover 5 can be hooked on the upper limit hole 34 of the second balance bracket through the upper limit block 51 of the second balance bracket, thereby driving the second metal balance bracket 3 to press down and rise for reset. The L-shaped structure only requires the horizontal part of the upper limit block 51 of the second balance bracket to pass through the upper limit hole 34 of the second balance bracket during assembly. Its overall structure is simple and the installation is convenient, which is beneficial to production. When an external force presses the upper cover 5, the upper cover 5 moves downward and presses against the extension plate 32 of the second balance bracket, driving the extension plate 32 of the second balance bracket to move downward, thereby driving the second metal balance bracket 3 to move downward. When the external force is removed from the upper cover 5, the balance bracket reset elastic body 4 and the button reset elastic body 6 are respectively reset under their own elastic restoring forces. The button reset elastic body 6 presses against the lower end surface of the upper cover 5 and pushes the upper cover 5 upward. The upper limit block 51 of the second balance bracket on the upper cover 5 presses against the upper end surface of the upper limit hole 34 of the second balance bracket, thereby lifting and resetting the second balance bracket. Cooperating with the contraction of the balance bracket reset elastic body 4, it drives the first metal balance bracket 2 and the second metal balance bracket 3 to move upward and reset, thereby improving the reset efficiency of this installation structure.

[0059] Preferably, as Figures 1 to 9 shown in the figure, the upper limit block 21 of the first balance bracket is in the shape of a flat long strip. The lower part of the upper limit hole 52 of the first balance bracket is W-shaped, with its lower side concave and the middle convex. The upper limit block 21 of the first balance bracket takes the middle convex position as the rotation fulcrum. When the first metal balance bracket 2 moves downward, the upper limit block 21 of the first balance bracket rotates with the middle convex position of the upper limit hole 52 of the first balance bracket as the rotation fulcrum. The outer side of the upper limit block 21 of the first balance bracket turns into the concave position outside the upper limit hole 52 of the first balance bracket or the upper limit block 21 of the first balance bracket is in a horizontal state in the upper limit hole 52 of the first balance bracket. When the first metal balance bracket 2 moves upward, the upper limit block 21 of the first balance bracket rotates with the middle convex position of the upper limit hole 52 of the first balance bracket as the rotation fulcrum. The inner side of the upper limit block 21 of the first balance bracket turns into the concave position inside the upper limit hole 52 of the first balance bracket. The two cooperate with each other, thereby giving the user a feeling of touch when pressing. And through the structure with the middle convex of the upper limit hole 52 of the first balance bracket, while restricting the rotation position of the upper limit block 21 of the first balance bracket, it also ensures the flexibility of the rotation of the upper limit block 21 of the first balance bracket, improving people's use experience.

[0060] Preferably, as Figures 2 to 3 、 Figure 8As shown, at the position between the two sets of upper limit holes 52 of the upper cover 5, there is formed a first balance frame guide post 53 that protrudes downward and is integrally semicircular. The upper limit block 21 of the first balance frame uses the middle protruding position at the lower part of the upper limit hole 52 of the first balance frame and the first balance frame guide post 53 as the rotation fulcrum, and the middle part of the upper end of the upper limit block 21 of the first balance frame is jacked up through the semicircular shape, so that the upper limit block 21 of the first balance frame can rotate more easily in the upper limit hole 52 of the first balance frame, further improving the rotation flexibility of the upper limit block 21 of the first balance frame and enhancing people's usage experience.

[0061] Another preferred solution is, as Figures 10 to 13 shown, the upper limit block 21 of the first balance frame is in the shape of a flat long strip, and the overall shape of the upper limit hole 52 of the first balance frame is a gourd shape, with the side edges at the upper and lower ends being recessed outward and the middle parts being convex inward. The upper limit block 21 of the first balance frame uses the middle protruding positions at the upper and lower ends as the rotation fulcrum. When the first metal balance frame 2 moves downward, the upper limit block 21 of the first balance frame uses the middle protruding positions at the upper and lower ends of the upper limit hole 52 of the first balance frame as the rotation fulcrum, the outer side of the upper limit block 21 of the first balance frame turns into the recessed position on the outer side of the lower end of the upper limit hole 52 of the first balance frame, and the inner side of the upper limit block 21 of the first balance frame turns into the recessed position on the inner side of the upper end of the upper limit hole 52 of the first balance frame, or the upper limit block 21 of the first balance frame is in a horizontally level state within the upper limit hole 52 of the first balance frame. When the first metal balance frame 2 moves upward, the upper limit block 21 of the first balance frame uses the middle protruding positions at the upper and lower ends of the upper limit hole 52 of the first balance frame as the rotation fulcrum, the inner side of the upper limit block 21 of the first balance frame turns into the recessed position on the inner side of the lower end of the upper limit hole 52 of the first balance frame, and the outer side of the upper limit block 21 of the first balance frame turns into the recessed position on the outer side of the upper end of the upper limit hole 52 of the first balance frame. The two cooperate with each other to give the user a feeling of touch when pressing. And through the structure with the middle parts protruding at both the upper and lower ends of the upper limit hole 52 of the first balance frame, while restricting the rotation position of the upper limit block 21 of the first balance frame, it also ensures the rotation flexibility of the upper limit block 21 of the first balance frame and enhances people's usage experience.

[0062] Another preferred solution is, as Figure 14 and Figure 15As shown, the upper limit block 21 on the first balance frame is in the shape of a flat long strip, the overall shape of the upper limit hole 52 on the first balance frame is circular, and the upper limit block 21 on the first balance frame is tangent to the circular upper limit hole 52 on the first balance frame. Therefore, when the upper limit block 21 on the first balance frame rotates, it is guided and limited by the circular upper limit hole 52 on the first balance frame. The circular hole structure is beneficial to the rotation of the upper limit block 21 on the first balance frame, improves the flexibility of the rotation of the upper limit block 21 on the first balance frame, and thus improves people's use experience.

[0063] Preferably, as Figures 1 to 9 shown, the lower limit block 33 on the second balance frame is in the shape of a flat long strip, the lower part of the lower limit hole 11 on the second balance frame is W-shaped, with its upper side edges sunken and the middle protruding. The lower limit block 33 on the second balance frame rotates with the middle protruding position as the rotation fulcrum. When the second metal balance frame 3 moves downward, the lower limit block 33 on the second balance frame rotates with the middle protruding position of the lower limit hole 11 on the second balance frame as the rotation fulcrum, and the outer side of the lower limit block 33 on the second balance frame turns into the sunken position outside the lower limit hole 11 on the second balance frame, or the lower limit block 33 on the second balance frame is in a horizontal state in the lower limit hole 11 on the second balance frame. When the second metal balance frame 3 moves upward, the lower limit block 33 on the second balance frame rotates with the middle protruding position of the lower limit hole 11 on the second balance frame as the rotation fulcrum, and the inner side of the lower limit block 33 on the second balance frame turns into the sunken position inside the lower limit hole 11 on the second balance frame. The two cooperate with each other, thus giving the user a feeling of touch when pressing, and through the structure with the middle protruding part of the lower limit hole 11 on the second balance frame, while restricting the rotation position of the lower limit block 33 on the second balance frame, it also ensures the flexibility of the rotation of the lower limit block 33 on the second balance frame, and improves people's use experience.

[0064] Another preferred solution, as Figures 10 to 13As shown, the second balance frame lower limit block 33 is in the shape of a flat long strip. The second balance frame lower limit hole 11 is overall in the shape of a gourd, with the sides of its upper and lower ends being recessed outward and the middle parts being convex inward. The second balance frame lower limit block 33 takes the middle convex positions at the upper and lower ends of the second balance frame lower limit hole 11 as the rotation fulcrums. When the second metal balance frame 3 moves downward, the second balance frame lower limit block 33 takes the middle convex positions at the upper and lower ends of the second balance frame lower limit hole 11 as the rotation fulcrums. The outer side of the second balance frame lower limit block 33 turns into the recessed position inside the lower end of the second balance frame lower limit hole 11, and the inner side of the second balance frame lower limit block 33 turns into the recessed position inside the upper end of the second balance frame lower limit hole 11, or the second balance frame lower limit block 33 is in a horizontal state in the second balance frame lower limit hole 11. When the second metal balance frame 3 moves upward, the second balance frame lower limit block 33 takes the middle convex positions at the upper and lower ends of the second balance frame lower limit hole 11 as the rotation fulcrums. The inner side of the second balance frame lower limit block 33 turns into the recessed position inside the upper end of the second balance frame lower limit hole 11, and the outer side of the second balance frame lower limit block 33 turns into the recessed position outside the lower end of the second balance frame lower limit hole 11. The two cooperate with each other to give the user a feeling of touch when pressing. And through the structure with the middle parts of both the upper and lower ends of the second balance frame lower limit hole 11 being convex, while restricting the rotation position of the second balance frame lower limit block 33, it also ensures the flexibility of the rotation of the second balance frame lower limit block 33, improving people's use experience.

[0065] Another preferred solution is as Figure 14 and Figure 15 shown. The second balance frame lower limit block 33 is in the shape of a flat long strip. The second balance frame lower limit hole 11 is overall circular. The second balance frame lower limit block 33 is tangent to the circular second balance frame lower limit hole 11, so that when the second balance frame lower limit block 33 rotates, it is guided and limited by the circular second balance frame lower limit hole 11. The circular hole structure is conducive to the rotation of the second balance frame lower limit block 33, improving the flexibility of the rotation of the second balance frame lower limit block 33, and thus improving people's use experience.

[0066] Preferably, as Figures 1 to 9As shown, the first balance frame lower limit block 22 is in the shape of a flat long strip. The lower part of the first balance frame lower limit hole 12 is W-shaped, with its lower side edges sunken and the middle protruding. The first balance frame lower limit block 22 rotates with the protruding position in the middle as the rotation fulcrum. When the first metal balance frame 2 moves downward, the first balance frame lower limit block 22 rotates with the protruding position in the middle of the first balance frame lower limit hole 12 as the rotation fulcrum, and the outer side of the first balance frame lower limit block 22 turns into the sunken position outside the first balance frame lower limit hole 12, or the first balance frame lower limit block 22 is in a horizontally flat state within the first balance frame lower limit hole 12. When the first metal balance frame 2 moves upward, the first balance frame lower limit block 22 rotates with the protruding position in the middle of the first balance frame lower limit hole 12 as the rotation fulcrum, and the inner side of the first balance frame lower limit block 22 turns into the sunken position inside the first balance frame lower limit hole 12. The two cooperate with each other to give the user a feeling of pressing when using, and through the mechanism with the protruding middle of the first balance frame lower limit hole 12, while restricting the rotation position of the first balance frame lower limit block 22, it also ensures the flexibility of the rotation of the first balance frame lower limit block 22, improving people's use experience.

[0067] Another preferred solution is, for example Figures 10 to 13As shown, the first balance frame lower limit block 22 is in the shape of a flat long strip. The overall shape of the first balance frame lower limit hole 12 is gourd-shaped, with the sides of its upper and lower ends being recessed outward and the middle parts being convex inward. The first balance frame lower limit block 22 takes the middle convex positions at the upper and lower ends of the first balance frame lower limit hole 12 as the rotation fulcrums. When the first metal balance frame 2 moves downward, the first balance frame lower limit block 22 takes the middle convex positions at the upper and lower ends of the first balance frame lower limit hole 12 as the rotation fulcrums. The outer side of the first balance frame lower limit block 22 turns into the recessed position inside the lower end of the first balance frame lower limit hole 12, and the inner side of the first balance frame lower limit block 22 turns into the recessed position inside the upper end of the first balance frame lower limit hole 12, or the first balance frame lower limit block 22 is in a horizontally level state within the first balance frame lower limit hole 12. When the first metal balance frame 2 moves upward, the first balance frame lower limit block 22 takes the middle convex positions at the upper and lower ends of the first balance frame lower limit hole 12 as the rotation fulcrums. The inner side of the first balance frame lower limit block 22 turns into the recessed position inside the upper end of the first balance frame lower limit hole 12, and the outer side of the first balance frame lower limit block 22 turns into the recessed position outside the lower end of the first balance frame lower limit hole 12. The two cooperate with each other to give the user a tactile feeling when pressing. And through the structure with the middle parts convex at both the upper and lower ends of the first balance frame lower limit hole 12, while restricting the rotation position of the first balance frame lower limit block 22, it also ensures the flexibility of the rotation of the first balance frame lower limit block 22, improving people's use experience.

[0068] Another preferred solution is, as Figure 14 and Figure 15 shown, the first balance frame lower limit block 22 is in the shape of a flat long strip, the overall shape of the first balance frame lower limit hole 12 is circular, and the first balance frame lower limit block 22 is tangent to the circular first balance frame lower limit hole 12, so that when the first balance frame lower limit block 22 rotates, it is guided and limited by the circular first balance frame lower limit hole 12. The circular hole structure is beneficial to the rotation of the first balance frame lower limit block 22, improving the flexibility of the rotation of the first balance frame lower limit block 22, and thus improving people's use experience.

[0069] For the shape structures of the second balance frame lower limit hole 11, the first balance frame lower limit hole 12, and the first balance frame upper limit hole 52, they can be freely combined according to the actual situation.

[0070] Regarding the specific manner of pivotally connecting the first metal balance frame 2 and the second metal balance frame 3, such as Figures 4 to 5 、 Figure 7 、 Figure 11 and Figure 15As shown, a rotating shaft 23 is formed in the middle of the first metal balance frame 2 and is embedded in the second metal balance frame 3. A rotating limit hole 35 for the rotating shaft 23 to be embedded and rotate is formed in the middle of the second metal balance frame 3. When installation is required, just align the rotating shaft 23 with the rotating limit hole 35 and embed it to complete the assembly of the first metal balance frame 2 and the second metal balance frame 3. The overall structure is simple, the installation is convenient, and it is conducive to production.

[0071] Preferably, as Figure 11 and Figure 15 shown, the rotating shaft 23 is in the shape of a flat strip. The overall shape of the rotating limit hole 35 is gourd-shaped. The sides of its upper and lower ends are both recessed outward and the middle parts are both convex inward. The middle convex positions of the upper and lower ends of the rotating shaft 23 are the rotation fulcrums. When an external force is applied downward, the rotating shaft 23 takes the middle convex positions of the upper and lower ends of the rotating limit hole 35 as the rotation fulcrums. The side of the rotating shaft 23 close to the upper limit hole 34 of the second balance frame is embedded in the recessed position at the upper end of the side of the rotating limit hole 35 close to the upper limit hole 34 of the second balance frame, and the side of the rotating shaft 23 far from the upper limit hole 34 of the second balance frame is embedded in the recessed position at the lower end of the side of the rotating limit hole 35 far from the upper limit hole 34 of the second balance frame. Or the rotating shaft 23 is in a horizontally flat state in the rotating limit hole 35, so that the first metal balance frame 2 and the second metal balance frame 3 can move downward normally. When the external force is removed, the rotating shaft 23 takes the middle convex positions of the upper and lower ends of the rotating limit hole 35 as the rotation fulcrums. The side of the rotating shaft 23 close to the upper limit hole 34 of the second balance frame is embedded in the recessed position at the lower end of the side of the rotating limit hole 35 close to the upper limit hole 34 of the second balance frame, and the side of the rotating shaft 23 far from the upper limit hole 34 of the second balance frame is embedded in the recessed position at the upper end of the side of the rotating limit hole 35 far from the upper limit hole 34 of the second balance frame. The two cooperate with each other to give the user a feeling of touch when pressing. And through the structure with the middle parts of both the upper and lower ends of the rotating limit hole 35 being convex, 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.

[0072] Another preferred solution, as Figures 4 to 5 、 Figure 7 and Figure 15 shown, the rotating shaft 23 is in the shape of a flat strip. The overall shape of the rotating limit hole 35 is circular. The rotating shaft 23 is tangent to the circular rotating limit hole 35, so that when the rotating shaft 23 rotates, it is guided and limited by the circular rotating limit hole 35. 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.

[0073] It should be noted here that the installation structure of the ultra-thin keyboard switch balance bracket disclosed by the present utility model is an improvement on the specific structure, and the specific control method is not the innovation point of the present utility model. For the keyboard, circuit board, conduction component, spring, tension spring and other components involved in the present utility model, they can be common 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.

[0074] As mentioned above, it is only a 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 the same or similar technical features as 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 installation structure of a balance bracket for an ultra-thin keyboard switch, comprising a base plate, a first metal balance bracket rotatably arranged on the base plate, a second metal balance bracket rotatably arranged on the base plate, a balance bracket return elastic body sleeved between the first metal balance bracket and the second metal balance bracket, an upper cover arranged on the first metal balance bracket and the second metal balance bracket, and a key return elastic body arranged between the base plate and the upper cover. The first metal balance bracket and the second metal balance bracket cross each other and are pivotally connected together in a superposable manner, and are characterized in that: On both sides of one end of the upper cover, there are respectively provided second upper limit blocks of the balance frame that are embedded in the second metal balance frame. On both sides of one end of the second metal balance frame, there are respectively formed second upper limit holes of the balance frame for the second upper limit blocks of the balance frame to be embedded.

2. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 1, wherein: On both sides of the other end of the upper cover, there are respectively formed first upper limit holes of the balance frame for the first metal balance frame to be embedded. On both sides of one end of the first metal balance frame, there are respectively formed first upper limit blocks of the balance frame that are embedded in the first upper limit holes of the balance frame.

3. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 1, wherein: On both sides of the other end of the second metal balance frame, there are respectively formed second lower limit blocks of the balance frame that are embedded in the substrate. At one end of the substrate, there is formed a second lower limit hole of the balance frame for the second lower limit blocks of the balance frame to be embedded.

4. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 2, characterized in that: On both sides of the other end of the first metal balance frame, there are respectively formed first lower limit blocks of the balance frame that are embedded in the substrate. At the other end of the substrate, there is formed a first lower limit hole of the balance frame for the first lower limit blocks of the balance frame to be embedded.

5. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 1, wherein: The second metal balance frame includes a second balance frame plate body rotatably provided on the substrate, and a second balance frame extension plate formed at one end of the second balance frame plate body and extending upward. The second upper limit holes of the balance frame are provided at one end of the second balance frame plate body, or on the second balance frame extension plate, or at the connection between the second balance frame plate body and the second balance frame extension plate.

6. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 1, wherein: The second upper limit block of the balance frame is integrally L-shaped, and its horizontal part is hooked on the second upper limit hole of the balance frame.

7. The mounting structure of the ultra-thin keyboard switch balance bracket according to claim 2, characterized in that: The first upper limit block of the balance frame is flat and long. The lower part of the first upper limit hole of the balance frame is W-shaped, with its lower side edges sunken and the middle protruding.

8. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 2, wherein: The first upper limit block of the balance frame is flat and long. The first upper limit hole of the balance frame is integrally gourd-shaped, with the side edges of its upper end and lower end both sunken outward and the middle both protruding inward.

9. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 2, characterized in that: The first upper limit block of the balance frame is flat and long. The first upper limit hole of the balance frame is integrally circular, and the first upper limit block of the balance frame is tangent to the circular first upper limit hole of the balance frame.

10. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 3, characterized in that: The second lower limit block of the balance frame is flat and long. The lower part of the second lower limit hole of the balance frame is M-shaped, with its upper side edges protruding and the middle sunken.

11. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 3, wherein: The second lower limit block of the balance frame is flat and long. The second lower limit hole of the balance frame is integrally gourd-shaped, with the side edges of its upper end and lower end both sunken outward and the middle both protruding inward.

12. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 3, characterized in that: The second lower limit block of the balance frame is flat and long. The second lower limit hole of the balance frame is integrally circular, and the second lower limit block of the balance frame is tangent to the circular second lower limit hole of the balance frame.

13. The mounting structure of the ultra-thin keyboard switch balance bracket according to claim 4, characterized in that: The first lower limit block of the balance frame is flat and long. The lower part of the first lower limit hole of the balance frame is M-shaped, with its upper side edges protruding and the middle sunken.

14. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 4, characterized in that: The first lower limit block of the balance frame is flat and long. The first lower limit hole of the balance frame is integrally gourd-shaped, with the side edges of its upper end and lower end both sunken outward and the middle both protruding inward.

15. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 4, characterized in that: The first lower limit block of the balance frame is flat and long. The first lower limit hole of the balance frame is integrally circular, and the first lower limit block of the balance frame is tangent to the circular first lower limit hole of the balance frame.

16. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 1, wherein: A rotating shaft is formed in the middle of the first metal balance bracket and is embedded in the second metal balance bracket. A rotating limit hole for the rotating shaft to be embedded and rotate is formed in the middle of the second metal balance bracket.

17. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 16, characterized in that: The rotating shaft is in the shape of a flat long strip. The overall shape of the rotating limit hole is gourd-shaped, with the sides of its upper and lower ends being recessed outward and the middle parts being convex inward.

18. The installation structure of the ultra-thin keyboard switch balance bracket according to claim 16, characterized in that: The rotating shaft is in the shape of a flat long strip. The overall shape of the rotating limit hole is circular, and the rotating shaft is tangent to the circular rotating limit hole.

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