Button connection components

Abstract

The present invention discloses a key connection assembly, which includes a base plate and a bracket. The base plate includes a main board body and a positioning structure, a limiting structure and an abutting wing formed on the main board body. A through hole is formed between the positioning structure and the limiting structure. The through hole has a notch. The main board body has a receiving hole connected to the through hole. The bracket includes a bracket body and an actuating shaft with an outer shaft portion. The actuating shaft extends outward from the lower bracket portion of the bracket body. The outer shaft portion extends outward from the actuating shaft. The actuating shaft passes through the through hole and is limited in the through hole by the hook-shaped portion of the limiting structure. The positioning side wall of the positioning structure and the abutting side wall of the abutting wing limit the actuating shaft. The key connection assembly of the present invention can prevent the keycap from shaking due to the gap between the actuating shaft and the inner wall of the limiting structure when the keycap moves vertically relative to the base plate.

Description

Technical Field

[0001] The present invention relates to a key connection assembly of a key, and in particular to a key connection assembly capable of firmly connecting a bottom plate of a key and a bracket. Background Art

[0002] A typical key is connected to a keycap and a base plate in a rotatable and / or slidable manner by a lifting mechanism composed of a pair of bracket components, thereby allowing the keycap to move vertically relative to the base plate.

[0003] A common way to connect the support member to the base plate is to form a hook-shaped or clamp-shaped limiting structure on the base plate, and the hook-shaped or clamp-shaped limiting structure is used to connect to the rotating shaft of the support member.

[0004] However, the base plate and its retaining structure are typically made of metal plates, while the bracket member is made of a polymer material. Therefore, when the bracket member's shaft is forced into the retaining structure using an interference assembly, the shaft is easily cut by the retaining structure, resulting in an unnecessary gap between the shaft and the inner wall of the retaining structure. This gap causes the keycap to wobble when the keycap is moved by force applied by the user. Summary of the Invention

[0005] In view of the problems in the prior art, the present invention provides a key connection assembly to solve the above problems.

[0006] Therefore, the technical problem to be solved by the present invention is to provide a key connection component of a key, which includes: a bottom plate, a main board body, an abutting wing, a positioning structure and a limiting structure, a notch and a through hole are provided between the positioning structure and the limiting structure, so that the positioning structure and the limiting structure are penetrated along the bearing direction, the main board body also defines a supporting end and a receiving hole, the receiving hole is connected to the through hole, the supporting end is located on one side of the receiving hole, the limiting structure has a hook-shaped portion, and the abutting wing is located on the limiting structure front side; and at least one bracket connected to the base plate, the bracket comprising a bracket body and at least one actuating shaft; wherein the actuating shaft of the bracket passes through the through hole between the positioning structure and the limiting structure, at least a portion of the actuating shaft is accommodated in the accommodating hole, at least another portion of the actuating shaft abuts against the upper surface of the supporting end of the base plate, and the abutting wing abuts against one side of the actuating shaft, so that the hook-shaped portion of the limiting structure, the positioning structure, the abutting wing and the supporting end of the base plate jointly limit the actuating shaft.

[0007] The present invention also provides a key connection assembly, comprising: a base plate, comprising a main board body, a positioning structure and a limiting structure, wherein a notch and a through hole are provided between the positioning structure and the limiting structure, so that the positioning structure and the limiting structure are penetrated along the bearing direction, the main board body also defines a supporting end and a receiving hole, the receiving hole is connected to the through hole, the supporting end is located on one side of the receiving hole, and the limiting structure has a hook-shaped portion; and at least one bracket, connected to the base plate, the bracket comprising a bracket body and at least one actuating shaft; wherein the actuating shaft of the bracket passes through the through hole between the positioning structure and the limiting structure, at least a part of the actuating shaft is received in the receiving hole, and at least another part of the actuating shaft rests against the upper surface of the supporting end of the base plate, so that the hook-shaped portion of the limiting structure, the positioning structure, the receiving hole of the base plate and the supporting end jointly limit the actuating shaft.

[0008] As an optional technical solution, the positioning structure has a positioning side wall, the positioning side wall of the positioning structure and the limiting side wall of the limiting structure are spaced apart by a limiting distance, and the notch is located between the top of the positioning structure and the hook-shaped portion of the limiting structure, and the through hole is defined between the positioning side wall of the positioning structure and the limiting side wall of the limiting structure.

[0009] As an optional technical solution, the gap of the notch is smaller than the main shaft diameter of the actuating shaft, and the main shaft diameter is smaller than the limit distance.

[0010] As an optional technical solution, the end of the actuating shaft has an outer shaft portion with a different shaft diameter from the actuating shaft body, and the one with a smaller shaft diameter between the actuating shaft body and the outer shaft portion rests against the upper surface of the supporting end of the base plate.

[0011] As an optional technical solution, the end of the actuating shaft has an outer shaft portion, the main shaft diameter of the actuating shaft is larger than the outer shaft diameter of the outer shaft portion, and the outer shaft portion rests against the upper surface of the supporting end of the base plate.

[0012] As an optional technical solution, the base plate further includes an abutting wing, which is located at the front side of the limiting structure and abuts against one side of the actuating shaft so that the abutting wing limits the actuating shaft.

[0013] As an optional technical solution, the positioning structure has a positioning side wall, the positioning side wall of the positioning structure is separated from the limiting side wall of the limiting structure by a limiting spacing, the abutting wing and the positioning structure have an abutting spacing, the limiting spacing is greater than the abutting spacing, and the abutting spacing is greater than the main shaft diameter of the actuating shaft.

[0014] As an optional technical solution, the abutting wing has an upper curved surface and an abutting wall surface, the abutting wall surface faces the actuating shaft, and the upper curved surface faces the bearing direction.

[0015] As an optional technical solution, the abutting wing has an upper curved surface and an abutting wall surface, and the upper curved surface serves as the abutting wall surface and faces the actuating shaft.

[0016] Compared to the prior art, the key connection assembly of the present invention includes a base plate and a bracket. The base plate includes a main board body and a positioning structure, a limiting structure and an abutting wing formed on the main board body. The bracket includes a bracket body and an actuating shaft having an outer shaft portion. A through hole with a notch is formed between the positioning structure and the limiting structure. The actuating shaft extends outward from the lower bracket portion of the bracket body. The outer shaft portion extends outward from the actuating shaft. The actuating shaft passes through the through hole and is limited in the through hole by the hook-shaped portion of the limiting structure. The positioning side wall of the positioning structure and the abutting side wall of the abutting wing limit the actuating shaft. The actuating shaft of the bracket of the key of the present invention can be firmly connected to the base plate, and the rotating shaft of the bracket can rotate and / or move in the limiting structure of the base plate, so that when the keycap moves vertically relative to the base plate, the keycap will not shake due to the gap between the actuating shaft and the inner wall of the limiting structure.

[0017] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 1 is a schematic diagram of the expanded elements and components of a key according to a preferred embodiment of the present invention.

[0019] Figure 2 yes Figure 1 Magnified schematic diagram of the area where paired scaffolds are marked with dashed ellipses.

[0020] Figure 3 yes Figure 1 An enlarged schematic diagram of the midsole plate marked with a dotted ellipse area.

[0021] Figure 4 FIG. 1 is a schematic diagram of the appearance of a key after being assembled and the keycaps removed according to a preferred embodiment of the present invention.

[0022] Figure 5 yes Figure 4 An enlarged diagram of the area marked with a dotted oval after the keycap is removed.

[0023] Figure 6 1 is a schematic diagram of the appearance of a deformed bottom plate of a key according to a preferred embodiment of the present invention.

[0024] Figure 7 yes Figure 6 An enlarged schematic diagram of the midsole plate marked with a dotted ellipse area.

[0025] Figure 8 FIG. 1 is a schematic diagram of the appearance of another modified base plate of a key according to a preferred embodiment of the present invention.

[0026] Figure 9 yes Figure 8 An enlarged schematic diagram of the midsole plate marked with a dotted ellipse area.

[0027] Figure 10 FIG. 1 is a schematic diagram of the appearance of another modified base plate of a key according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0029] See also Figures 1 to 10 , schematically depicting a key 1 according to a preferred embodiment of the present invention. Figure 1 The key 1 according to a preferred embodiment of the present invention is schematically depicted in an expanded view of components and members. Figure 2 yes Figure 1 The enlarged schematic diagram of the area where the paired brackets 13 are marked with dotted ellipses. Figure 3 yes Figure 1 The midsole plate 10 is an enlarged schematic diagram of the area marked with a dotted ellipse. Figure 4 FIG. 1 is a schematic diagram of the appearance of a key 1 after being assembled and the keycap 11 is removed according to a preferred embodiment of the present invention. Figure 5 yes Figure 4 FIG. 1 is an enlarged schematic diagram of the key 1 after the keycap 11 is removed and the dotted elliptical area is marked. Figure 6 FIG. 1 is a schematic diagram of the appearance of a deformed base plate 10 of the key 1 according to a preferred embodiment of the present invention. Figure 7 yes Figure 6 The midsole plate 10 is an enlarged schematic diagram of the area marked with a dotted ellipse. Figure 8 FIG. 1 is a schematic diagram of the appearance of another modified base plate 10 of the key 1 according to a preferred embodiment of the present invention. Figure 9 yes Figure 8 The midsole plate 10 is an enlarged schematic diagram of the area marked with a dotted ellipse. Figure 10 FIG. 1 is a schematic diagram of the appearance of another modified base plate 10 of the key 1 according to a preferred embodiment of the present invention. Figure 1 and Figure 4 The key 1 shown is a multiple key and a butterfly-type lifting mechanism as an example, but the key 1 according to the preferred embodiment of the present invention is not limited to this. It can be implemented on a general key that is not a multiple key, and can also be implemented on a scissor-type lifting mechanism.

[0030] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, the key 1 according to a preferred embodiment of the present invention comprises a keycap 11 and a key connecting assembly 18 located below the keycap 11 and connected to the keycap 11. The key connecting assembly 18 further comprises a base plate 10 and one or more brackets 13. Figure 1 and Figure 4 The key 1 shown has a bracket 13 which is one of the components of the butterfly-type lifting mechanism 12, and the butterfly-type lifting mechanism 12 includes two sets of paired brackets 13. The following only uses one set of paired brackets 13 and their matching connection structure as an example for detailed description.

[0031] like Figure 3 As shown, the base plate 10 includes a main body 101, a positioning structure 102, a retaining structure 103, and an abutting wing 104. The upright positioning structure 102 is formed on the horizontal main body 101. The positioning structure 102 defines a front side FS and a rear side BS opposite the front side FS. The positioning structure 102 has a top 1020 and a positioning sidewall 1022.

[0032] An upright limiting structure 103 is formed on the main body 101 and is opposite to a positioning structure 102. The limiting structure 103 and the positioning structure 102 extend generally in parallel along a limiting direction R. The limiting structure 103 and the positioning structure 102 can be located on the same straight line, or offset from each other but parallel. The limiting structure 103 includes a hook-shaped portion 1032 extending toward the positioning structure 102 opposite thereto. A notch 1011 and a through hole 1010 are provided between the positioning structure 102 and the limiting structure 103, and the notch 1011 and the through hole 1010 are connected to each other up and down. The through hole 1010 is formed between the upright positioning structure 102 and the opposing limiting structure 103. A notch 1011 is defined above the through hole 1010. A notch 1011 is formed between the hook-shaped portion 1032 and the top 1020 of the positioning structure 102. The notch 1011 and the through-hole 1010 allow the positioning structure 102 and the opposing limiting structure 103 to penetrate along a bearing direction A. The limiting direction R is perpendicular to the bearing direction A. The limiting structure 103 has a limiting sidewall 1034 facing the positioning sidewall 1022. The main body 101 further has a receiving hole 1014 and a supporting end 1015. Both the receiving hole 1014 and the supporting end 1015 are located at the front side FS. The horizontal receiving hole 1014 is in horizontal and vertical communication with the vertical through-hole 1010, and the supporting end 1015 is located in front of the receiving hole 1014.

[0033] like Figure 4 and Figure 5As shown, an upright abutment tab 104 is formed on the main body 101, for example, by stamping the tab out of the main body 101 and bending it upward. The abutment tab 104 is located in front of the limiting structure 103, but the bending direction of the abutment tab 104 is not limited. The upper curved surface 1044 of the abutment tab 104 may face the bearing direction A or the actuating shaft 134 (perpendicular to the bearing direction A or parallel to the limiting direction R). The abutment tab 104 has an abutment sidewall 1042 that faces the actuating shaft 134 or the positioning sidewall 1022, that is, the abutment sidewall 1042 is perpendicular to the bearing direction A or parallel to the limiting direction R. Figure 5 The middle abutting sidewall 1042 is perpendicular to the upper curved surface 1044 . The upper curved surface 1044 faces the bearing direction A, while the abutting sidewall 1042 is parallel to or faces the limiting direction R.

[0034] The keycap 11 is placed above the base plate 10 and can move vertically relative to the base plate 10. The bracket 13 includes a bracket body 132 and an actuating shaft 134. The bracket body 132 includes an upper bracket portion 1322 and a lower bracket portion 1324. The upper bracket portion 1322 is slidably and / or rotatably connected to the bottom surface 110 of the keycap 11. For example, Figure 1 As shown, the keycap 11 includes eight receiving grooves 112 formed on the bottom surface 110. The bracket 13 further includes a pair of protrusions 138 extending outward from the upper bracket portion 1322. The protrusions 138 are placed in the corresponding receiving grooves 112 and slide back and forth in the corresponding receiving grooves 112 as the keycap 11 moves vertically relative to the base plate 10.

[0035] The actuating shaft 134 of the bracket 13 extends outward from the lower bracket portion 1324. The distal end of the actuating shaft 134 includes an outer shaft portion 136 of varying diameter. The outer shaft portion 136 is coaxial with the actuating shaft 134 and extends outward from the actuating shaft 134. The main shaft diameter d1 of the actuating shaft 134 is greater than the outer shaft diameter d2 of the outer shaft portion 136. Furthermore, the outer shaft portion 136 can abut against the upper surface of the supporting end 1015 of the base plate 10, as shown in FIG. Figures 2 to 5 Because at least a portion of the actuating shaft 134 is accommodated in the accommodating hole 1014, the outer shaft portion 136 (i.e., at least another portion of the actuating shaft 134) abuts against the upper surface of the supporting end 1015 of the base plate 10. Therefore, the actuating shaft 134 can be restrained by the wall of the accommodating hole 1014, the supporting end 1015 of the base plate 10, and the hook-shaped portion 1032 of the original positioning structure 102 and the limiting structure 103. The abutting wing 104 is not absolutely necessary to restrain the actuating shaft 134.

[0036] In other embodiments, the shaft diameters may be reversed, that is, the main shaft diameter d1 of the actuating shaft 134 is smaller than the outer shaft diameter d2 of the outer shaft portion 136. The key point is that in various embodiments of the present invention, the main body 101 of the base plate 10 may provide a receiving hole 1014 to accommodate at least a portion of the actuating shaft 134 (the portion with a larger shaft diameter), while at least another portion with a smaller shaft diameter abuts against the supporting end 1015, regardless of which portion is on the outside. In this way, the larger shaft diameter portion of the actuating shaft 134 is constrained by the receiving hole 1014. Furthermore, the supporting end 1015 is located to one side of the receiving hole 1015, allowing it to abut against the smaller shaft diameter portion of the actuating shaft 134. Even if the abutment tab 104 is removed, the actuating shaft 134 with a variable shaft diameter, the receiving hole 1014, and the supporting end 1015 alone can eliminate unnecessary gaps in the connection of the actuating shaft 134 caused by assembly interference defects.

[0037] Figure 1 and Figure 4 The key 1 shown has the lower bracket portions 1324 of the paired brackets 13 connected together, but the present invention is not limited to this. The key 1 according to the preferred embodiment of the present invention can also be implemented on the paired brackets 13 whose lower bracket portions 1324 are not connected together.

[0038] The actuating shaft 134 is inserted into the through hole 1010 through the notch 1011 of the through hole 1010 and is restrained in the through hole 1010 by the hook portion 1032, so that the bracket body 132 is placed on the rear side BS, at least a portion of the outer shaft portion 136 is placed on the upper surface of the supporting end 1015, and the positioning side wall 1022 of the positioning structure 102 and the abutting side wall 1042 of the abutting wing 104 restrain the actuating shaft 134, as shown in FIG. Figure 4 and Figure 5 Thus, the actuating shaft 134 of the bracket 13 of the key 1 according to the preferred embodiment of the present invention is rotatably and firmly connected to the base plate 10 .

[0039] In one embodiment, a limiting distance L1 between the limiting sidewall 1034 of the limiting structure 103 and the positioning sidewall 1022 of the positioning structure 102 is equal to or greater than the main shaft diameter d1 of the actuating shaft 134. An abutting distance L2 between the abutting sidewall 1042 of the abutting wing 104 and the positioning sidewall 1022 of the positioning structure 102 is equal to the main shaft diameter d1 of the actuating shaft 134.

[0040] In one embodiment, the main body 101 , the positioning structure 102 , the limiting structure 103 and the abutting wing 104 can be formed of a metal plate by a stamping process.

[0041] In one embodiment, Figure 1 and Figure 3The limiting side wall 1034 of the limiting structure 103 is shown. During the stamping process, the contact wing 104 is bent upward so that the upper curved surface 1044 faces or is parallel to the bearing direction A.

[0042] In one embodiment, Figure 1 、 Figure 3 and Figure 5 As shown, two adjacent positioning structures 102 are integrated into a single structure. In this way, the two adjacent positioning structures 102 can reinforce each other, so that the manufacturing yield of the bottom plate 10 formed by the stamping process is improved. Figure 1 、 Figure 3 and Figure 5 In FIG. 1 , two adjacent positioning structures 102 are marked with a dotted line for distinction.

[0043] Further, similarly Figure 1 and Figure 4 As shown, the key 1 according to a preferred embodiment of the present invention further includes a membrane switch layer 15, an elastic actuating element 16 and two connecting members 17. The membrane switch layer 15 further includes a switch 152. The switch 152 is located below the keycap 11. The membrane switch layer 15 is placed on the base plate 10. The elastic actuating element 16 is arranged between the keycap 11 and the base plate 10, and is located above the switch 152. When the keycap 11 is pressed and moved to the pressed position, the elastic actuating element 16 deforms and triggers the switch 152. When the keycap 11 is released, the elastic actuating element 16 provides the restoring force required for the keycap 11 to return to the unpressed position, and releases the switch 152. Figure 2 In the example shown, the elastic actuator 16 is disposed between the two butterfly-type lifting mechanisms 12. Two connecting members 17 respectively connect the brackets 13 of different butterfly-type lifting mechanisms 12, so that the two butterfly-type lifting mechanisms 12 can operate in unison.

[0044] According to the preferred embodiment of the present invention, the key 1 is modified in that only the structure of the bottom plate 10 is slightly different, and therefore, only the differences of the bottom plate 10 will be described in detail. Figure 6 and Figure 7 In the bottom plate 10 shown, the upper curved surface 1044 serves as the abutment wall 1042 and faces the actuating shaft 134. That is, the upper curved surface 1044, or the abutment wall 1042, faces the limiting direction R or the perpendicular bearing direction A. In other words, during the stamping process, the abutment wing 104 bends upward so that the upper curved surface 1044 faces the actuating shaft 134, that is, faces or is parallel to the limiting direction R or the perpendicular bearing direction A. In this case, the upper curved surface 1044 can directly serve as the abutment wall 1042. Figure 6 、 Figure 7 There are Figure 1 、 Figure 3Components marked with the same numbers have the same or similar structures and functions, and will not be described in detail here. Similarly, when the actuating shaft 134 is inserted into the through hole 1010 through the notch 1011 of the through hole 1010, at least a portion of the outer shaft portion 136 is placed on the upper surface of the supporting end 1015, and the positioning side wall 1022 of the positioning structure 102 and the abutting side wall 1042 of the abutting wing 104 restrict the actuating shaft 134. In addition, Figure 6 and Figure 7 In the embodiment, two adjacent positioning structures 102 are integrated into a single structure. In this way, the two adjacent positioning structures 102 can reinforce each other, thereby improving the manufacturing yield of the bottom plate 10 formed by the stamping process. Figure 6 and Figure 7 In FIG. 1 , two adjacent positioning structures 102 are marked with a dotted line for distinction.

[0045] According to another variation of the key 1 of the preferred embodiment of the present invention, only the structure of the bottom plate 10 is slightly different, so only the differences of the bottom plate 10 are described in detail. Figure 8 and Figure 9 In the bottom plate 10 shown, the upper curved surface 1044 serves as the abutment wall 1042 and faces the actuating shaft 134. That is, the upper curved surface 1044, or the abutment wall 1042, faces the limiting direction R or the perpendicular bearing direction A. In other words, during the stamping process, the abutment wing 104 bends upward so that the upper curved surface 1044 faces the actuating shaft 134, that is, faces or is parallel to the limiting direction R or the perpendicular bearing direction A. In this case, the upper curved surface 1044 can directly serve as the abutment wall 1042. Figure 8 、 Figure 9 There are Figure 1 、 Figure 3 Components marked with the same numbers have the same or similar structures and functions, and will not be described in detail here. Similarly, when the actuating shaft 134 is inserted into the through hole 1010 through the notch 1011 of the through hole 1010, at least a portion of the outer shaft portion 136 is placed on the upper surface of the supporting end 1015, and the positioning side wall 1022 of the positioning structure 102 and the abutting side wall 1042 of the abutting wing 104 restrict the actuating shaft 134. In addition, Figure 8 and Figure 9 In the embodiment, two adjacent limiting structures 103 are integrated into a single structure, and the distance between the two abutting wings 104 is also shortened. In this way, the two adjacent limiting structures 103 can reinforce each other, so that the manufacturing yield of the bottom plate 10 formed by the stamping process is improved. Figure 8 and Figure 9 In the figure, two adjacent limiting structures 103 are marked with a dotted line for distinction.

[0046] According to another variation of the key 1 of the preferred embodiment of the present invention, only the structure of the bottom plate 10 is slightly different, so only the differences of the bottom plate 10 are described in detail. Figure 10 The bottom plate 10 shown has two adjacent positioning structures 102 integrated into a single structure and two adjacent limiting structures 103 integrated into a single structure. Figure 10 In the figure, two adjacent positioning structures 102 and two adjacent limiting structures 103 are marked with dotted lines for separation. Figure 10 It is explained that the positions of the front side FS and the back side BS are not absolute, but depend on the relative positions of different sets of positioning structures 102 , limiting structures 103 and abutting wings 104 .

[0047] In summary, in the key connection assembly of the present invention, the actuating shaft of the bracket is restrained by the positioning sidewalls of the positioning structure and the abutting sidewalls of the abutting wing. Thus, the actuating shaft of the bracket of the key according to the present invention is securely connected to the base plate, and the bracket's rotating shaft can rotate and / or move within the base plate's restraining structure. This prevents the keycap from shaking due to the gap between the actuating shaft and the inner wall of the restraining structure when the keycap moves vertically relative to the base plate.

[0048] The above detailed description of the preferred embodiments is intended to more clearly illustrate the features and spirit of the present invention, and is not intended to limit the present invention to the preferred embodiments disclosed above. Rather, the purpose is to encompass various modifications and equivalent arrangements within the scope of the patent application. Therefore, the scope of the patent application should be interpreted broadly based on the above description to encompass all possible modifications and equivalent arrangements.

Claims

1. A key connection assembly, characterized in that Include: The bottom plate includes a main plate body, an abutting wing, a positioning structure, and a limiting structure. A notch and a through hole are provided between the positioning structure and the limiting structure, so that the positioning structure and the limiting structure are penetrated along the bearing direction. The main plate body further defines a bearing end and a receiving hole, the receiving hole is connected to the through hole, the bearing end is located on one side of the receiving hole, the limiting structure has a hook-shaped portion, and the abutting wing is located on the front side of the limiting structure; and At least one bracket connected to the base plate, the bracket comprising a bracket body and at least one actuating shaft; The actuating shaft of the bracket passes through the through hole between the positioning structure and the limiting structure, at least a portion of the actuating shaft is accommodated in the accommodating hole, at least another portion of the actuating shaft rests against the upper surface of the supporting end of the base plate, and the abutting wing rests against one side of the actuating shaft, so that the hook-shaped portion of the limiting structure, the positioning structure, the abutting wing and the supporting end of the base plate jointly limit the actuating shaft.

2. A key connection assembly, characterized in that Include: The bottom plate includes a main plate body, a positioning structure and a limiting structure, wherein a notch and a through hole are provided between the positioning structure and the limiting structure so that the positioning structure and the limiting structure are penetrated along the bearing direction, the main plate body further defines a supporting end and a receiving hole, the receiving hole is connected to the through hole, the supporting end is located on one side of the receiving hole, and the limiting structure has a hook-shaped portion; and At least one bracket connected to the base plate, the bracket comprising a bracket body and at least one actuating shaft; The actuating shaft of the bracket passes through the through hole between the positioning structure and the limiting structure, at least a portion of the actuating shaft is accommodated in the accommodating hole, and at least another portion of the actuating shaft rests against the upper surface of the supporting end of the base plate, so that the hook-shaped portion of the limiting structure, the positioning structure, the accommodating hole of the base plate and the supporting end jointly restrict the actuating shaft.

3. The key connection assembly according to claim 1 or 2, characterized in that: The positioning structure has a positioning side wall, the positioning side wall of the positioning structure and the limiting side wall of the limiting structure are spaced apart by a limiting distance, the notch is located between the top of the positioning structure and the hook-shaped portion of the limiting structure, and the through hole is defined between the positioning side wall of the positioning structure and the limiting side wall of the limiting structure.

4. The key connection assembly according to claim 3, wherein: The gap of the notch is smaller than the main shaft diameter of the actuating shaft, and the main shaft diameter is smaller than the limiting distance.

5. The key connection assembly according to claim 1 or 2, characterized in that: The end of the actuating shaft has an outer shaft portion with a different shaft diameter from that of the actuating shaft body. The one with a smaller shaft diameter between the actuating shaft body and the outer shaft portion rests against the upper surface of the supporting end of the base plate.

6. The key connection assembly according to claim 1 or 2, characterized in that: The end of the actuating shaft is provided with an outer shaft portion. The main shaft diameter of the actuating shaft is larger than the outer shaft diameter of the outer shaft portion, and the outer shaft portion is pressed against the upper surface of the supporting end of the bottom plate.

7. The key connection assembly according to claim 2, wherein: The bottom plate further comprises an abutting wing, which is located at the front side of the limiting structure and abuts against one side of the actuating shaft so that the abutting wing limits the actuating shaft.

8. The key connection assembly according to claim 1 or 7, wherein: The positioning structure has a positioning side wall, and the positioning side wall of the positioning structure is spaced apart from the limiting side wall of the limiting structure by a limiting spacing. There is an abutting spacing between the abutting wing and the positioning structure, and the limiting spacing is greater than the abutting spacing, and the abutting spacing is greater than the main shaft diameter of the actuating shaft.

9. The key connection assembly according to claim 1 or 7, characterized in that: The abutting wing has an upper curved surface and an abutting wall surface. The abutting wall surface faces the actuating shaft, and the upper curved surface faces the bearing direction.

10. The key connection assembly according to claim 1 or 7, characterized in that: The abutting wing has an upper curved surface and an abutting wall surface, and the upper curved surface serves as the abutting wall surface and faces the actuating shaft.

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