Keycap lifting mechanism and long rectangular key structure
By designing a continuously arranged support structure, the contradiction between keycap stability and circuit board layout space in the key structure was resolved, achieving both stable movement and enhanced strength.
Patent Information
- Application Number
- CN202510890604.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-09-18
- Filing Date
- 2025-06-30
- Publication Date
- 2026-03-20
AI Technical Summary
In key structures, as the size decreases, it becomes difficult to maintain the stability of the keycaps and brackets, and the space for the circuit board on the base plate is limited, leading to structural design difficulties.
The special design of the first and second brackets forms a continuous arrangement of the first support structure, the middle support structure, and the second support structure. Multiple support arms connect to the base plate to ensure the stable movement of the keycaps and provide ample space for circuit design on the base plate.
This design enables stable up-and-down movement of the keycaps, enhances the structural strength of the base plate, and provides more layout space for circuit design, avoiding interference with circuit board layout.
Smart Images
Figure CN121709458A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a key structure, in particular to a long-rectangular key structure and a key cap lifting mechanism thereof. BACKGROUND
[0002] In a key structure, a key cap is supported above a bottom plate by a bracket and moves up and down relative to the bottom plate via the bracket. Whether the key cap can be stably actuated, the bracket, the bottom plate and the configuration of the connection structure therebetween all play an important role. The key structure usually has a circuit board stacked on the bottom plate. However, the structure of the bottom plate used for connecting with the bracket, and the opening structure of the bottom plate to avoid structural interference with other components (such as the bracket, the pivot connection between the brackets, and the structure of the key cap used for connecting with the bracket) all affect the configuration of the circuit board. When the size of the key structure is reduced, the stability of the actuation of the key cap and the bracket is difficult to maintain. If the area of the bottom plate that can provide the circuit board is considered, the configuration and design of the bracket and related structures will be more difficult. SUMMARY
[0003] In view of the problems in the prior art, the purpose of the present application is to provide a key cap lifting mechanism, which reduces the impact of the bracket structure on the configuration of the bottom plate structure of the key structure through the special design of the connection structure between the brackets, and still maintains a certain degree of mechanism actuation stability.
[0004] According to one aspect of the present application, the present application provides a key cap lifting mechanism for a long-rectangular key structure, the long-rectangular key structure having a long-side direction and a short-side direction, the key cap lifting mechanism comprising:
[0005] a first bracket, the first bracket comprising a first long arm extending parallel to the long-side direction and a plurality of first arms extending from the first long arm non-parallel to the long-side direction; and
[0006] a second bracket, the second bracket comprising a second long arm extending parallel to the long-side direction and a plurality of second arms extending from the second long arm non-parallel to the long-side direction, the first bracket and the second bracket being pivotally connected to each other via the plurality of first arms and the plurality of second arms about a pivot axis, the plurality of first arms and the plurality of second arms being staggered along the pivot axis, the pivot axis being parallel to the long-side direction;
[0007] wherein the first bracket and the second bracket collectively form a first support structure, a second support structure and an intermediate support structure along the pivot axis, the intermediate support structure being arranged between the first support structure and the second support structure, the intermediate support structure comprising two first arms and at least one second arm located between the two first arms;
[0008] The two second arms arranged adjacent to the two first arms of the intermediate support structure outside the intermediate support structure are not pivoted with the two first arms of the intermediate support structure.
[0009] As an optional technical solution, the first support structure and the second support structure respectively comprise two second arms arranged adjacent to the two first arms of the intermediate support structure outside the intermediate support structure.
[0010] As an optional technical solution, the two second arms arranged adjacent to the two first arms of the intermediate support structure outside the intermediate support structure have a second bottom shaft and a second bottom hole formed beside the second bottom shaft, and the distance from the second bottom hole to the side of the second arm facing the intermediate support structure in the direction parallel to the pivot axis is 0.5-1.0 mm.
[0011] As an optional technical solution, the first support structure comprises two second arms and a first arm between the two second arms.
[0012] As an optional technical solution, the first support structure comprises two second arms and a first arm between the two second arms.
[0013] As an optional technical solution, the length of the intermediate support structure along the pivot axis is greater than the length of the first support structure along the pivot axis, and greater than the length of the second support structure along the pivot axis.
[0014] As an optional technical solution, the length of the two second arms arranged adjacent to the two first arms of the intermediate support structure outside the intermediate support structure along the pivot axis is less than the length of the two first arms of the intermediate support structure along the pivot axis.
[0015] As an optional technical solution, the intermediate support structure comprises two second arms, and a dome hole is formed between the two second arms.
[0016] As an optional technical solution, each first arm has a first bottom shaft, and each second arm has a second bottom shaft.
[0017] According to another aspect of the present application, the present application also provides another long-rectangular key structure having a long-side direction and a short-side direction, the long-rectangular key structure comprising:
[0018] a bottom plate;
[0019] a key cap disposed above the bottom plate; and
[0020] the key cap lifting mechanism described above, the first support being connected with the key cap via the first long arm and connected with the bottom plate via the first plurality of support arms, the second support being connected with the key cap via the second long arm and connected with the bottom plate via the second plurality of support arms, the key cap being movable up and down relative to the bottom plate via the first support and the second support.
[0021] As an optional technical solution, the long-rectangular key structure further comprises a switch circuit board stacked on the bottom plate, the switch circuit board comprising a lower circuit carrier and an upper circuit carrier stacked above the lower circuit carrier, the lower circuit carrier having a plurality of lower lines, the upper circuit carrier having a plurality of upper lines, the plurality of lower lines being electrically connected with the plurality of upper lines via an electrical connection structure, the vertical projection of the key cap on the switch circuit board covering part of the electrical connection structure.
[0022] According to yet another aspect of the present application, the present application also provides another long-rectangular key structure having a long-side direction and a short-side direction, the long-rectangular key structure comprising:
[0023] a bottom plate;
[0024] a key cap disposed above the bottom plate; and
[0025] a first support comprising a first long arm and a first plurality of support arms, the first long arm extending parallel to the long-side direction, the first plurality of support arms protruding and extending from the first long arm non-parallel to the long-side direction, the first support being connected with the key cap via the first long arm and connected with the bottom plate via the first plurality of support arms;
[0026] a second support comprising a second long arm and a second plurality of support arms, the second long arm extending parallel to the long-side direction, the second plurality of support arms protruding and extending from the second long arm non-parallel to the long-side direction, the second support being connected with the key cap via the second long arm and connected with the bottom plate via the second plurality of support arms, the first support and the second support being pivotally connected with each other about a pivot axis via the first plurality of support arms and the second plurality of support arms, the first plurality of support arms and the second plurality of support arms being staggered along the pivot axis, the pivot axis being parallel to the long-side direction, the key cap being movable up and down relative to the bottom plate via the first support and the second support; and
[0027] A switch circuit board is stacked on the bottom plate. The switch circuit board includes a lower circuit board and an upper circuit board stacked above the lower circuit board. The lower circuit board has a plurality of lower lines, and the upper circuit board has a plurality of upper lines. The plurality of lower lines and the plurality of upper lines are electrically connected via an electrical connection structure. The vertical projection of the keycap on the switch circuit board covers part of the electrical connection structure.
[0028] In summary, the keycap lifting mechanism and the long-rectangular key structure of the present application form the first support structure, the intermediate support structure and the second support structure in continuous arrangement by the first support and the second support. The bottom plate of the long-rectangular key structure can be stably connected with the first support structure, the intermediate support structure and the second support structure, and the bottom plate can maintain a certain structural strength. At the same time, more sufficient design space can be provided for circuit design.
[0029] The present application is described in detail below in conjunction with the accompanying drawings and specific embodiments, but is not limited to the present application. BRIEF DESCRIPTION OF DRAWINGS
[0030] Figure 1 It is a partial exploded schematic view of the long-rectangular key structure according to an embodiment.
[0031] Figure 2 It is Figure 1 It is an exploded schematic view of the long-rectangular key structure.
[0032] Figure 3 It is Figure 1 It is a top view of the long-rectangular key structure after removing the keycap.
[0033] Figure 4 It is Figure 1 It is a top view of the first support and the second support of the long-rectangular key structure.
[0034] Figure 5 It is Figure 1 It is a top view of the switch circuit board and the bottom plate of the long-rectangular key structure.
[0035] Figure 6 It is Figure 5 It is a cross-sectional view of the switch circuit board along line X-X. DETAILED DESCRIPTION
[0036] In order to further understand the purpose, structure, features and functions of the present application, the following detailed description is provided in conjunction with the embodiments.
[0037] The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only the directions referring to the attached drawings. The prefix words of the component names, such as first, second, etc., are only for distinguishing the components, facilitating the description, and do not impose other restrictions on the components; in addition, the components with the same prefix words in different embodiments do not necessarily correspond to each other. The correspondence of the components in different embodiments should be determined according to the specific structure described in each embodiment.
[0038] Please refer to Figures 1 to 4 . The long rectangular key structure 1 according to the first embodiment has a long side direction D1 and a short side direction D2 (both are represented by double-headed arrows in the drawings), and the long side direction D1 is perpendicular to the short side direction D2. In actual operation, the long rectangular key structure 1 can be, but is not limited to, the space bar in the keyboard. The long rectangular key structure 1 includes a keycap 10, a bottom plate 12, a first support 14, a second support 16, a switch circuit board 18, and an elastic round protrusion 20. The keycap 10 is arranged above the bottom plate 12. The first support 14 and the second support 16 are pivotally connected to each other around a pivot axis A1 (represented by a chain line in the drawings), and the pivot axis A1 is parallel to the long side direction D1. The first support 14 and the second support 16 are connected to the keycap 10 and the bottom plate 12 to support the keycap 10 above the bottom plate 12, so that the keycap 10 can move relative to the bottom plate 12 (for example, move up and down or be called move parallel to a vertical direction Dv) through the first support 14 and the second support 16; wherein the combination of the first support 14 and the second support 16 is a keycap lifting mechanism. The vertical direction Dv (represented by a double-headed arrow in the drawings) is perpendicular to the long side direction D1 and the short side direction D2. The switch circuit board 18 is stacked on the bottom plate 12 and has a switch 182 (represented by a diagonal line filled circle in Figure 2 . The elastic round protrusion 20 is arranged on the switch circuit board 18 corresponding to the switch 182 and located below the keycap 10. The keycap 10 can be pressed to move towards the bottom plate 12, thereby pressing the elastic round protrusion 20 to trigger the switch 182 downward.
[0039] Further, the first support 14 includes a first long arm 142 and a plurality of first support arms 144. The first long arm 142 extends parallel to the long side direction D1. The plurality of first support arms 144 protrude and extend from the first long arm 142 non-parallel to the long side direction D1 (in this embodiment, perpendicular to the long side direction D1). The ranges of the first long arm 142 and the first support arms 144 are both schematically shown by dashed lines in Figure 2In the middle, the first bracket 14 is connected to the keycap 10 via a first long arm 142 and to the base plate 12 via the plurality of first support arms 144; wherein, the plurality of gripping shafts 146 of the first long arm 142 are rotatably connected to the plurality of gripping hooks 102 of the keycap 10, and the plurality of first bottom shafts 148 of the plurality of first support arms 144 are slidably and rotatably connected to the plurality of first bottom hooks 122 of the base plate 12. A first bottom hole 150 is formed next to the first bottom shaft 148, and the first bottom hook 122 extends into the corresponding first bottom hole 150 to hook the corresponding first bottom shaft 148.
[0040] The second support 16 includes a second long arm 162 and a plurality of second support arms 164. The second long arm 162 extends parallel to the long side direction D1. The plurality of second support arms 164 extend from the second long arm 162 not parallel to the long side direction D1 (in this embodiment, they extend perpendicular to the long side direction D1). The extent of the second long arm 162 and the second support arms 164 is indicated by dashed boxes. Figure 2 The second bracket 16 is connected to the keycap 10 via a second long arm 162 and to the base plate 12 via a plurality of second support arms 164. A plurality of sliding shafts 166 of the second long arm 162 are slidably and rotatably connected to a plurality of sliding hooks 104 of the keycap 10, and a plurality of second bottom shafts 168 of the plurality of second support arms 164 are rotatably connected to a plurality of second bottom hooks 124 of the base plate 12. A second bottom hole 170 is formed beside the second bottom shaft 168, and a second bottom hook 124 extends into the corresponding second bottom hole 170 to hook the corresponding second bottom shaft 168. Furthermore, the base plate 12 also includes a plurality of stop portions 123. The stop portions 123 limit the second bracket 16 so that the second bottom shaft 168 is held by the corresponding second bottom hook 124.
[0041] The first support 14 and the second support 16 are pivotally connected to each other around a pivot axis A1 via multiple first arms 144 and multiple second arms 164. The multiple first arms 144 and multiple second arms 164 are arranged alternately along the pivot axis A1. The first support 14 and the second support 16 together form a first support structure 13a, a second support structure 13b, and an intermediate support structure 13c along the pivot axis A1 (the extent of which is indicated by chain-lined boxes). Figure 4(In the middle). An intermediate support structure 13c is arranged between the first support structure 13a and the second support structure 13b. The first support structure 13a includes two second arms 164 and a first arm 144 sandwiched between the two second arms 164. The two sides of the first arm 144 are pivotally connected to the two second arms 164 via two central shafts 152 (wherein, the two central shafts 152 are respectively inserted into the corresponding pivot holes 174 on the two second arms 164). The second support structure 13b also includes two second arms 164 and a first arm 144 sandwiched between the two second arms 164; similarly, in the second support structure 13b, the two sides of the first arm 144 are also pivotally connected to the two second arms 164 via two central shafts 152 (wherein, the two central shafts 152 are respectively inserted into the corresponding pivot holes 174 on the two second arms 164). The intermediate support structure 13c includes two first arms 144 and two second arms 164 sandwiched between the two first arms 144, with a dome 172 formed between the two second arms 164 (in which an elastic round protrusion 20 is accommodated, such as...). Figure 1 As shown). In the intermediate support structure 13c, the first arm 144 and the adjacent second arm 164 are pivotally connected via a central shaft 152 (wherein, the central shaft 152 is inserted into the corresponding pivot hole 174 on the second arm 164); overall, the intermediate support structure 13c also uses two central shafts 152 for pivot connection (the two central shafts 152 are respectively inserted into the corresponding pivot holes 174 on the two second arms 164).
[0042] On the other hand, the first support structure 13a, the second support structure 13b, and the intermediate support structure 13c all use two gripping shafts 146 and two sliding shafts 166 to connect with the keycap 10, and use four bottom hooks to connect with the base plate 12 (wherein, the two first bottom hooks 122 are connected to the first support 14 (the first arm 144), and the two second bottom hooks 124 are connected to the second support 16 (the second arm 164)). Furthermore, two second arms 164 are arranged adjacent to the two first arms 144 of the intermediate support structure 13c on the outside of the intermediate support structure 13c (i.e., as shown in the image). Figure 4 In the first support structure 13a, the second arm 164 on the right and the second arm 164 on the left of the second support structure 13b are not pivotally connected to the two first arms 144 of the aforementioned intermediate support structure 13c. Therefore, in a certain respect, the first support structure 13a, the intermediate support structure 13c, and the second support structure 13b can logically be regarded as three independent support structures (except for being adjacently connected by the first long arm 142 and the second long arm 162). In addition, the intermediate support structure 13c can also logically be regarded as two half-support structures (each half-support structure includes a first arm 144 and a second arm 164, which are pivotally connected by a central axis 152).
[0043] Please seeFigure 2 and Figure 5 ; wherein, in Figure 5 , the hidden profile of the bottom plate 12 is shown in dotted line, and the vertical projection profile of the keycap 10 on the switch circuit board 18 is shown in chain line. The first bottom hooks 122 and the second bottom hooks 124 of the bottom plate 12 protrude upward, and the switch circuit board 18 is stacked on the bottom plate 12 and has openings formed at positions corresponding to the first bottom hooks 122 and the second bottom hooks 124, so that the first bottom hooks 122 and the second bottom hooks 124 can pass through the openings. Therefore, the arrangement of the first bottom hooks 122 and the second bottom hooks 124 can affect the circuit layout in the switch circuit board 18. Generally, a long rectangular key structure uses an even number of support structures with the same structure logic, such as two or four, to obtain a balanced keyboard support effect. However, using two support structures cannot easily provide uniform support force for the keycaps, affecting the stability of the up-and-down movement of the keycaps; using four (or more) support structures requires a number of bottom hooks (for example, sixteen bottom hooks) to be arranged, which will form too many openings on the switch circuit board, seriously affecting the circuit layout in the switch circuit board, such as causing the width of the vertical (equivalent to the short side direction D2 in the present embodiment) circuit trace to be too narrow, and the number of passable wires to be greatly reduced. In the present embodiment, the aspect ratio of the keycap 10 is about 4:1, and the first support structure 13a, the middle support structure 13c, and the second support structure 13b are arranged continuously along the pivot axis A1 to effectively support the keycap 10 and provide a stable up-and-down movement mechanism for the keycap 10. The long rectangular key structure 1 uses a total of twelve bottom hooks (six first bottom hooks 122 and six second bottom hooks 124), and the switch circuit board 18 still has five vertical circuit channel portions 184 (for circuit traces), each of which has a relatively wide width. Four of the circuit channel portions 184 (excluding the middle circuit channel portion 184) are located directly below the first arm 144 in the vertical direction Dv and are not covered by the second arm 164.
[0044] In addition, the bottom hooks (the first bottom hooks 122 and the second bottom hooks 124) are generally formed by bending and extending from the bottom plate 12, so the arrangement of the bottom hooks (the first bottom hooks 122 and the second bottom hooks 124) can also affect the structural strength of the bottom plate 12. Generally, a long rectangular key structure uses an even number of support structures with the same structure logic, so it also uses more bottom hooks, resulting in a significant reduction in the structural strength of the bottom plate. In the present embodiment, the long rectangular key structure 1 uses a total of twelve bottom hooks (six first bottom hooks 122 and six second bottom hooks 124), so the degree to which the structural strength of the bottom plate 12 is affected can also be suppressed, so that the bottom plate 12 can maintain a certain structural strength. In addition, the pivot structure (the middle shaft 152 and the pivot hole 174) between the first arm 144 and the second arm 164 is thick in principle, and the bottom plate 12 also has openings to avoid the pivot structure. Please refer to Figure 4 and Figure 5In this embodiment, the middle support structure 13c is not directly pivoted with the first and second support structures 13a, 13b on both sides thereof, and the bottom plate 12 does not need to form an opening at the position corresponding to the middle support structure 13c, which can enhance the structural strength of the bottom plate 12.
[0045] Please refer to Figure 1 and Figure 4 (in which, for simplifying the drawing, only some element symbols are indicated, and other element symbols are indicated by referring to Figure 2 and Figure 3 ). The middle support structure 13c is present on both sides of the elastic circular protrusion 20 (along the pivot axis A1), so that, in general, the long-rectangular key structure 1 does not use an even number of support structures, and the keycap 10 can still be uniformly supported (along the pivot axis A1). As shown in Figure 4 , the length Lc of the middle support structure 13c along the pivot axis A1 is greater than the length La of the first support structure 13a along the pivot axis A1, and is greater than the length Lb of the second support structure 13b along the pivot axis A1. In addition, the lengths Wa and Wb of the two second arms 164 (i.e., the second arms 164 on the right side of the first support structure 13a and the second arms 164 on the left side of the second support structure 13b) adjacent to the two first arms 144 of the middle support structure 13c on the outside of the middle support structure 13c along the pivot axis A1 are less than the lengths Wc1 and Wc2 of the two first arms 144 of the middle support structure 13c along the pivot axis A1. Therefore, although the length Lc of the middle support structure 13c is relatively long, the first arms 144 of the middle support structure 13c are relatively wide (compared to the adjacent second arms 164 of the first and second support structures 13a, 13b), so that the structural strength of the middle support structure 13c as a whole can still be maintained.
[0046] In actual operation, in the second arms 164 adjacent to the first arms 144 of the middle support structure 13c (i.e., the second arms 164 on the right side of the first support structure 13a and the second arms 164 on the left side of the second support structure 13b), the distance da (or the distance db) from the second bottom hole 170 to the side surface 164a of the second arm 164 facing the middle support structure 13c in a direction parallel to the pivot axis A1 can be designed to be 0.5 to 1.0 mm, so as to increase the width (i.e., the lengths Wc1, Wc2) of the first arms 144 (of the middle support structure 13c) while maintaining sufficient local structural strength of the second arms 164 (to stably connect with the corresponding second bottom hook 124), thereby enhancing the structural strength of the middle support structure 13c as a whole.
[0047] In addition, as shown in Figure 4As shown, in the middle support structure 13c, the two middle shafts 152 extend (or said to extend towards each other) from the two first arms 144 along the pivot axis A1 towards the inside of the middle support structure 13c. In the first support structure 13a, the two middle shafts 152 extend (or said to extend away from each other) from the first arms 144 along the pivot axis A1 towards the outside of the first support structure 13a; the extending direction of the middle shafts 152 of the second support structure 13b is the same, and is not described again. In the middle support structure 13c, the middle shaft 152 extends from the first arm 144 on the outside, and the corresponding pivot hole 174 is formed in the second arm 164 on the inside, so as to reduce the influence of the pivot structure (i.e. the middle shaft 152 and the pivot hole 174) on the structural strength of the first arm 144, i.e. to reduce the influence on the overall structural strength of the middle support structure 13c.
[0048] Please refer to Figure 5 and Figure 6 . In the present embodiment, the switch circuit board 18 is a layered structure (for example, but not limited to, a thin film circuit board; in Figure 2 , a single board is used to simplify the drawing), which includes an upper circuit board 186, a lower circuit board 188, and a spacing layer 190. The lower circuit board 188 is stacked on the bottom plate 12, the upper circuit board 186 is stacked above the lower circuit board 188, and the spacing layer 190 is sandwiched between the upper circuit board 186 and the lower circuit board 188. The upper circuit board 186 has a plurality of upper lines 186a (partially hidden profile is shown in Figure 5 by dotted lines). The lower circuit board 188 has a plurality of lower lines 188a (partially hidden profile is shown in Figure 5 by dotted lines). The spacing layer 190 separates the upper lines 186a and the lower lines 188a to prevent direct contact between the upper lines 186a and the lower lines 188a. The spacing layer 190 has an opening 190a (the profile of which is shown in Figure 5 by dotted lines), and the upper lines 186a and the lower lines 188a are electrically connected at the opening 190a via an electrical connection structure 192. The electrical connection structure 192 can be, but is not limited to, an anisotropic conductive film (ACF) accommodated in the opening 190a; in Figure 6 , the part of the upper lines 186a and the lower lines 188a shown is equivalent to the end of the line, which serves as a connection pad and is electrically connected by the anisotropic conductive film. In the present embodiment, as shown in Figure 5 , the vertical projection of the keycap 10 on the switch circuit board 18 (the profile of which is shown in Figure 5The electrical connection structure 192 and the opening 190a of the cover portion are partially covered by the vertical projection of the keycap 10, i.e. part of the electrical connection structure 192 and the opening 190a are not covered by the vertical projection of the keycap 10. In another aspect, the electrical connection structure 192 of different layers of the switch circuit board 18 is outwardly displaced until part of the electrical connection structure 192 protrudes from the vertical projection of the keycap 10, so as to reduce the influence of the electrical connection structure 192 on the layout of the switch circuit board 18 below the keycap 10 (or increase the layout flexibility of the switch circuit board 18 below the keycap 10).
[0049] The keycap lifting mechanism and the long-rectangular key structure of the present application form the first support structure, the intermediate support structure and the second support structure in continuous arrangement by the first support and the second support, so that the two supports can form stable connection with the bottom plate, and the bottom plate can maintain certain structural strength. At the same time, more sufficient design space can be provided for circuit design.
[0050] Although the present application has been described in conjunction with the preferred embodiments thereof, it is to be understood that all matter contained in the above description or shown in the accompanying drawings is intended to illustrate and not to limit the scope of the present application. Other than the operational layouts of the embodiments disclosed, other changes and modifications are envisaged. Therefore, the appended claims are intended to cover all such changes and modifications that fall within the scope of the present application.
[0051] The present application has been described by the above-mentioned related embodiments, however, the above-mentioned embodiments are only examples for implementing the present application. It must be pointed out that the disclosed embodiments do not limit the scope of the present application. On the contrary, changes and modifications made without departing from the spirit and scope of the present application are within the scope of the patent protection of the present application.
Claims
1. A keycap lifting mechanism for a long rectangular key structure, the long rectangular key structure having a long side direction and a short side direction, characterized in that, The keycap lifting mechanism includes: A first support includes a first long arm and a plurality of first supporting arms. The first long arm extends parallel to the long side, and the plurality of first supporting arms extend from the first long arm in a direction not parallel to the long side. as well as The second support includes a second long arm and a plurality of second arms. The second long arm extends parallel to the long side, and the plurality of second arms extend from the second long arm in a direction not parallel to the long side. The first support and the second support are pivotally connected to each other via the plurality of first arms and the plurality of second arms about a pivot axis. The plurality of first arms and the plurality of second arms are staggered along the pivot axis, which is parallel to the long side. The first support and the second support together form a first support structure, a second support structure and an intermediate support structure along the pivot axis. The intermediate support structure is arranged between the first support structure and the second support structure. The intermediate support structure includes two first arms and at least one second arm located between the two first arms. The two second arms located outside the intermediate support structure and adjacent to the two first arms of the intermediate support structure are not pivotally connected to the two first arms of the intermediate support structure.
2. The keycap lifting mechanism according to claim 1, characterized in that, The first support structure and the second support structure each include two second arms located outside the intermediate support structure and arranged adjacent to the two first arms of the intermediate support structure.
3. The keycap lifting mechanism according to claim 2, characterized in that, The two second arms located outside the intermediate support structure and arranged adjacent to the two first arms of the intermediate support structure have a second bottom shaft and a second bottom hole formed next to the second bottom shaft. The distance from the second bottom hole to the side of the second arm facing the intermediate support structure in a direction parallel to the pivot axis is 0.5 to 1.0 mm.
4. The keycap lifting mechanism according to claim 1, characterized in that, The first support structure includes two second arms and a first arm located between the two second arms.
5. The keycap lifting mechanism according to claim 4, characterized in that, The first support structure includes two central shafts, and the two second arms of the first support structure are pivotally connected to the first arm of the first support structure via the two central shafts. The two central shafts of the first support structure extend from the first arm of the first support structure along the pivot axis toward the outside of the first support structure. The intermediate support structure includes two central shafts, and the two first arms of the intermediate support structure are pivotally connected to at least one second arm of the intermediate support structure via the two central shafts of the intermediate support structure. The two central shafts of the intermediate support structure extend from the two first arms of the intermediate support structure along the pivot axis toward the inside of the intermediate support structure.
6. The keycap lifting mechanism according to claim 1, characterized in that, The length of the intermediate support structure along the pivot axis is greater than the length of the first support structure along the pivot axis, and also greater than the length of the second support structure along the pivot axis.
7. The keycap lifting mechanism according to claim 1, characterized in that, The length of the two second arms located outside the intermediate support structure and adjacent to the two first arms of the intermediate support structure along the pivot axis is less than the length of the two first arms of the intermediate support structure along the pivot axis.
8. The keycap lifting mechanism according to claim 1, characterized in that, The intermediate support structure includes two second arms, which form a dome between the two second arms.
9. The keycap lifting mechanism according to claim 1, characterized in that, Each first arm has a first bottom shaft, and each second arm has a second bottom shaft.
10. A rectangular button structure, the rectangular button structure having a long side direction and a short side direction, characterized in that, This rectangular button structure includes: Base plate; Keycaps, which are mounted on the base plate; and As in any one of claims 1 to 9, the keycap lifting mechanism, wherein the first bracket is connected to the keycap via the first long arm and to the base plate via the plurality of first supports, the second bracket is connected to the keycap via the second long arm and to the base plate via the plurality of second supports, and the keycap is movable up and down relative to the base plate via the first bracket and the second bracket.
11. The rectangular button structure according to claim 10, characterized in that, It also includes a switch circuit board stacked on the base plate. The switch circuit board includes a lower circuit carrier board and an upper circuit carrier board stacked on top of the lower circuit carrier board. The lower circuit carrier board has multiple lower lines, and the upper circuit carrier board has multiple upper lines. The multiple lower lines and the multiple upper lines are electrically connected via an electrical connection structure. The keycap is located on the vertical projection of the electrical connection structure on the switch circuit board.
12. A rectangular button structure, the rectangular button structure having a long side direction and a short side direction, characterized in that, This rectangular button structure includes: Base plate; Keycaps, which are mounted on the base plate; and The first bracket includes a first long arm and a plurality of first support arms. The first long arm extends parallel to the long side, and the plurality of first support arms extend from the first long arm in a direction not parallel to the long side. The first bracket is connected to the keycap via the first long arm and to the base plate via the plurality of first support arms. The second bracket includes a second long arm and a plurality of second arms. The second long arm extends parallel to the long side, and the plurality of second arms protrude from the second long arm in a direction not parallel to the long side. The second bracket is connected to the keycap via the second long arm and to the base plate via the plurality of second arms. The first bracket and the second bracket are pivotally connected to each other via the plurality of first arms and the plurality of second arms about a pivot axis. The plurality of first arms and the plurality of second arms are staggered along the pivot axis, which is parallel to the long side. The keycap can move up and down relative to the base plate via the first bracket and the second bracket. as well as A switch circuit board is stacked on a base plate. The switch circuit board includes a lower circuit carrier board and an upper circuit carrier board stacked on top of the lower circuit carrier board. The lower circuit carrier board has multiple lower lines, and the upper circuit carrier board has multiple upper lines. The multiple lower lines and the multiple upper lines are electrically connected via an electrical connection structure. The keycap is located on the vertical projection of the electrical connection structure on the switch circuit board.