Key assembly and switch

Abstract

The utility model discloses a button assembly and a switch, and belongs to the technical field of panel switches, the button assembly comprises a pedestal, a circuit board assembly, an elastic pressing plate and a connecting piece; the base is provided with an accommodating cavity and a trigger hole, the accommodating cavity is communicated with the outside of the base through the trigger hole, the circuit board assembly is arranged in the accommodating cavity and is provided with a trigger key, the elastic pressing plate is provided with a connecting part and an elastic pressing part capable of generating elastic deformation around the connecting part, and the elastic pressing part is provided with an elastic pressing part capable of generating elastic deformation around the connecting part. The connecting part is connected with the base through the connecting piece, a pressing gap communicated with the trigger hole is formed between the elastic pressing part and the base, and the elastic pressing part can be in contact with the trigger key through the trigger hole when generating elastic deformation. The key assembly provided by the utility model is simple in structure, and can avoid the problems of jamming or loosening and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of panel switches, in particular to a key assembly and a switch. Background Art

[0002] At present, the button assembly of the existing panel switch generally adopts a seesaw structure connected by an axis. By pressing the pressing plate of the button assembly, the trigger key of the circuit board assembly is triggered, thereby opening the circuit, interrupting the current or causing it to flow to the electronic components of other circuits. Since the current pressing plate adopts a seesaw structure connected by an axis to achieve rotation, the axis rotates around the support point or buckle, and the axis is prone to getting stuck or loose when rotating, which may cause the pressing plate to get stuck or loose. Utility Model Content

[0003] The purpose of the embodiments of the utility model is to provide a key assembly and a switch, wherein the key assembly has a simple structure and can avoid problems such as jamming or loosening.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In one aspect, a key assembly is provided, comprising:

[0006] A base having a receiving cavity and a trigger hole; the receiving cavity is connected to the outside of the base through the trigger hole;

[0007] A circuit board assembly is arranged in the accommodating cavity; the circuit board assembly has a trigger key;

[0008] An elastic pressing plate, comprising a connecting portion and an elastic pressing portion capable of generating elastic deformation around the connecting portion;

[0009] as well as

[0010] Connectors;

[0011] The connecting portion is connected to the base via the connecting piece, a pressing gap communicating with the trigger hole is formed between the elastic pressing portion and the base, and the elastic pressing portion can contact the trigger key through the trigger hole when elastically deformed.

[0012] Optionally, the base includes a bottom shell and a surface cover installed on the bottom shell; the connecting piece has a threaded rod; the circuit board assembly is installed on the bottom shell, the trigger hole is opened on the surface cover, a connecting block is provided at the connecting portion, a connecting hole is opened on the surface cover, the connecting block passes through the connecting hole and is connected to the base through the threaded rod.

[0013] Optionally, the bottom shell has a mounting groove, the circuit board assembly is arranged in the mounting groove, the connecting block is provided with a first threaded hole, a positioning seat is provided on the positioning inner wall of the mounting groove, the positioning seat is provided with a second threaded hole, and the connecting block is connected to the positioning seat by the threaded rod passing through the first threaded hole and the second threaded hole.

[0014] Optionally, a positioning groove is provided on the positioning seat, and the positioning groove extends radially along the second threaded hole. The positioning groove has a bottom wall, a first positioning inner wall and a second positioning inner wall. The first positioning inner wall and the second positioning inner wall are arranged opposite to each other and are both connected to the bottom wall. The second threaded hole is opened on the bottom wall of the positioning groove and connected to the outside of the bottom shell. The connecting block is inserted into the positioning groove and the bottom wall, the first positioning inner wall and the second positioning inner wall are all abutted against the connecting block.

[0015] Optionally, the circuit board assembly further comprises a circuit board body, the trigger key is mounted on the circuit board body and electrically connected to the circuit board body, and an avoidance groove for the positioning seat to pass through is provided on the circuit board body.

[0016] Optionally, the button assembly further includes a light guide; the circuit board assembly further includes a light source; the light guide is mounted on the elastic pressing portion, a trigger platform is provided on the light guide, and the trigger hole and the trigger key are both located on a moving path of the trigger platform.

[0017] Optionally, the elastic pressing plate is a metal plate, and the elastic pressing plate has a first side surface and a second side surface, the first side surface and the second side surface are away from each other, and the pressing gap is formed between the second side surface and the base, an embedding groove is provided on the second side surface, and a light-transmitting hole connected to the embedding groove is provided on the first side surface, the light guide plate is clamped in the embedding groove, and the trigger platform is located in the pressing gap.

[0018] Optionally, the base has a third side surface and a bottom surface, the third side surface and the bottom surface are opposite to each other, the first side surface, the second side surface, the third side surface and the bottom surface are arranged in sequence, the pressing gap is formed between the second side surface and the third side surface, the elastic pressing plate is an arc plate, the first side surface, the second side surface and the third side surface are all arc surfaces with the same curvature, and the distance between the connecting portion and the bottom surface is greater than the distance between the elastic pressing portion and the bottom surface.

[0019] Optionally, the elastic pressing plate has two elastic pressing parts, and the connecting part is located between the two elastic pressing parts;

[0020] There are a plurality of the elastic pressing plates, the trigger holes, and the trigger keys, and the plurality of the elastic pressing portions, the plurality of the trigger holes, and the plurality of the trigger keys correspond to each other one by one.

[0021] On the other hand, a switch is provided, comprising the above-mentioned key assembly.

[0022] The beneficial effects of the utility model are as follows: the button assembly does not need to be provided with an axis and a buckle to provide a rotation support point for the pressing plate, and the structure is simple and easy to assemble. The elastic pressing plate of the button assembly has a connecting portion and an elastic pressing portion that can produce elastic deformation around the connected portion. The connecting portion is connected to the base through a connecting piece. The connecting portion and the base are relatively fixed and do not need to rotate relative to each other, thereby avoiding problems such as jamming or loosening when the connecting portion rotates relative to the base. When the elastic pressing portion of the elastic pressing plate is pressed, the elastic deformation produced by the elastic pressing portion is used to trigger the trigger key on the circuit board assembly, and the matching accuracy is high. After the external force is removed, the elastic pressing portion recovers its deformation and moves away from the trigger key.

[0023] By adopting the above-mentioned key assembly, the switch can avoid problems such as the elastic pressing plate being stuck or loosened, thereby improving the reliability of the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described in detail below based on the drawings and embodiments.

[0025] Figure 1 This is an exploded view of the button assembly;

[0026] Figure 2 A cross-sectional view of an assembly diagram of a key assembly;

[0027] Figure 3 Bit Figure 2 A magnified view of point A;

[0028] Figure 4 Bit Figure 2 A magnified view of B

[0029] Figure 5 Schematic diagram of the structure of the bottom shell;

[0030] Figure 6 It is a structural schematic diagram of the elastic pressing plate.

[0031] Description of the accompanying drawings:

[0032] 11. base; 12. circuit board assembly; 13. elastic pressing plate; 14. light guide; 15. communication connector; 16. pressing gap; 17. connector;

[0033] 111, bottom shell; 112, cover; 113, accommodating cavity; 114, trigger hole; 115, third side surface; 116, bottom surface; 117, connecting hole; 118, mounting groove; 119, positioning seat; 1191, second threaded hole; 1192, positioning groove; 1193, bottom wall; 1194, first positioning inner wall; 1195, second positioning inner wall;

[0034] 121. circuit board body; 122. trigger key; 123. light source; 124. avoidance groove;

[0035] 131, connecting portion; 132, elastic pressing portion; 133, connecting block; 134, first side surface; 135, second side surface; 136, fitting groove;

[0036] 141. Trigger station. DETAILED DESCRIPTION

[0037] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "fixed", "connected", "communicated", "abutted", "clamped" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0042] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0043] Unless specifically stated or defined otherwise, the term “and / or” used in the present invention includes any and all combinations of one or more of the associated listed items.

[0044] For the convenience of description, unless otherwise specified, the up and down directions mentioned below are the same as Figure 2 The up-down direction is consistent with the Figure 2 The left and right directions are consistent with the left and right directions mentioned below. Figure 2 The projection direction itself is consistent.

[0045] The pressing plate of the traditional key assembly adopts a seesaw structure in which the connecting part and the base are connected by an axis. Due to structural errors, the gap between the pressing plate and the base needs to be enlarged, otherwise the key sticking problem is likely to occur, and the key is prone to swing, which not only causes an uneven gap, but also the swinging and shaking will cause scratches between the pressing plate and the base, causing abnormal noise and increased resistance of the key assembly. In addition, the seesaw structure connected by an axis can easily cause the heights of the two ends of the pressing plate to be inconsistent, and the time difference for pressing the pressing plate is large, that is, the distance the pressing plate rotates each time it is pressed is relatively different, which greatly reduces the experience.

[0046] like Figures 1 to 6As shown, this embodiment provides a key assembly, including a base 11, a circuit board assembly 12, an elastic pressing plate 13, and a connecting member 17. The base 11 is used to support components such as the circuit board assembly 12, the elastic pressing plate 13, and the connecting member 17.

[0047] The base 11 has a housing cavity 113 and a trigger hole 114. The housing cavity 113 is used to accommodate the circuit board assembly 12, which plays a role of dustproof and waterproof. The circuit board assembly 12 is arranged in the housing cavity 113. The circuit board assembly 12 has a trigger key 122. The elastic pressing plate 13 has a connecting portion 131 and an elastic pressing portion 132 that can produce elastic deformation around the connecting portion 131. The connecting portion 131 is connected to the base 11 through a connecting member 17. After the connecting portion 131 is installed on the base 11, the connecting portion 131 is relatively fixed to the base 11, which can avoid the problem of stuck or loosening when the shaft rotates. The elastic pressing plate 13 of the present application is used to trigger the trigger key 122 of the circuit board assembly 12. The housing cavity 113 is connected to the outside of the base 11 through the trigger hole 114. The elastic pressing plate 13 is installed outside the housing cavity 113, which is convenient for users to press. The trigger hole 114 is for the elastic pressing portion 132 of the elastic pressing plate 13 to pass through. When the button assembly of the present application applies external force to the elastic pressing portion 132, the elastic pressing portion 132 can generate elastic deformation around the connecting portion 131, and the elastic pressing portion 132 passes through the trigger hole 114 into the accommodating cavity 113 and squeezes the trigger key 122, thereby realizing control of the current and electronic components on the circuit board assembly 12.

[0048] A pressing gap 16 connected to the trigger hole 114 is formed between the elastic pressing portion 132 of the present application and the base 11. The pressing gap 16, the trigger hole 114, and the trigger key 122 are all located on the moving path of the elastic pressing portion 132. The position of the trigger key 122 corresponds to the trigger hole 114, so that the elastic pressing portion 132 can contact the trigger key 122 when it is elastically deformed. The elastic pressing portion 132 can contact the trigger key 122 through the trigger hole 114 when it is elastically deformed. The trigger key 122 can be in the trigger hole 114, or it can extend from the trigger hole 114 to the pressing gap 16. The trigger key 122 can also be out of the trigger hole 114. The elastic pressing portion 132 can directly contact the trigger key 122. The elastic pressing portion 132 can also contact the trigger key 122 through a protrusion arranged on one side of the elastic pressing portion 132. Alternatively, a light guide sheet 14 with a trigger platform 141 arranged on the elastic pressing portion 132 can contact the trigger key 122. When an external force is applied to the elastic pressing portion 132, the elastic pressing portion 132 approaches the pressing gap 16, and the distance of the pressing gap 16 is reduced. Then, the elastic pressing portion 132 passes through the trigger hole 114 and enters the accommodating cavity 113 and squeezes the trigger key 122. After the external force is removed, the elastic pressing portion 132 uses its own elastic recovery deformation to move away from the trigger key 122. Each time the elastic pressing portion 132 is reset, the pressing gap 16 can remain consistent, the time difference of pressing the pressing plate is small, and there will be no uneven pressing gap 16. The user experience is greatly improved, and the scratches caused by swinging and shaking between the pressing plate and the base 11 are avoided, reducing the abnormal noise and resistance of the key assembly.

[0049] In one embodiment, the base 11 includes a bottom shell 111 and a cover 112 mounted on the bottom shell 111. The cover 112 is detachably mounted on the bottom shell 111 by means of a hook and a slot, and the cover 112 can also be detachably mounted on the bottom shell 111 by means of bolts. The connector 17 has a threaded rod, and the connector 17 can be selected from threaded fasteners such as bolts and screws. The circuit board assembly 12 is mounted on the bottom shell 111, the trigger hole 114 is opened on the cover 112, a connecting block 133 is provided at the connecting portion 131, and the connecting block 133 is integrally formed with the elastic pressing plate 13, a connecting hole 117 is opened on the cover 112, and the connecting block 133 passes through the connecting hole 117 and is connected to the base 11 by means of a threaded rod, and the connecting block 133 is directly fixed on the bottom shell 111 by means of a threaded rod, and the elastic pressing plate 13 is installed in combination with threaded fasteners, which can reduce the number of matching parts and has high matching accuracy.

[0050] Furthermore, the bottom shell 111 has a mounting groove 118, and the cover 112 covers the notch of the mounting groove 118 after being mounted on the bottom shell 111. The circuit board assembly 12 is arranged in the mounting groove 118, and the connecting block 133 is provided with a first threaded hole, which is not marked in the figure. A positioning seat 119 is provided on the positioning inner wall of the mounting groove 118, and the positioning seat 119 is integrally formed with the inner wall of the mounting groove 118 of the bottom shell 111, and a second threaded hole 1191 is provided on the positioning seat 119, and the connecting block 133 is connected to the positioning seat 119 by passing the first threaded hole and the second threaded hole 1191 through the threaded rod. The positioning seat 119 is a boss formed on the inner wall of the mounting groove 118. Compared with the threaded rod directly passing through the inner wall of the mounting groove 118, the present embodiment can strengthen the strength of the bottom shell 111 and strengthen the stability of the connection between the connecting block 133 and the bottom shell 111 by providing the positioning seat 119.

[0051] In one embodiment, a positioning groove 1192 is provided on the positioning seat 119, and the positioning groove 1192 extends along the radial direction of the second threaded hole 1191, and the positioning groove 1192 extends from left to right. The positioning groove 1192 has a bottom wall 1193, a first positioning inner wall 1194, and a second positioning inner wall 1195, the first positioning inner wall 1194 and the second positioning inner wall 1195 are arranged opposite to each other and are both connected to the bottom wall 1193, the second threaded hole 1191 is opened on the bottom wall 1193 of the positioning groove 1192 and communicates with the outside of the bottom shell 111, the connecting block 133 is inserted into the positioning groove 1192, and the bottom wall 1193, the first positioning inner wall 1194, and the second positioning inner wall 1195 are all in contact with the connecting block 133. By setting the positioning groove 1192, the connection block 133 is convenient for installation and positioning. When the connection block 133 is installed on the positioning seat 119, the connection block 133 is first inserted into the positioning groove 1192, and the bottom wall 1193, the first positioning inner wall 1194 and the second positioning inner wall 1195 are used to realize the positioning of the connection block 133 in the front-to-back direction and the up-and-down direction. Then, the connection block 133 is slid left and right to align the first threaded hole and the second threaded hole 1191. Compared with the traditional installation method that requires front-to-back, left-to-right and left-to-right adjustments to align the first threaded hole and the second threaded hole 1191, the present application only needs to slide and adjust in the left-to-right direction to achieve alignment, which is more convenient to install.

[0052] Optionally, the circuit board assembly 12 further comprises a circuit board body 121, the trigger key 122 is mounted on the circuit board body 121 and electrically connected to the circuit board body 121, and an avoidance groove 124 is provided on the circuit board body 121 for the positioning seat 119 to pass through. The avoidance groove 124 can avoid the mounting seat so that the mounting seat passes through the avoidance groove 124 and is connected to the connecting block 133, and can also realize the positioning of the circuit board body 121. The circuit board body 121 is sleeved on the mounting seat through the avoidance groove 124, and the installation and positioning of the circuit board body 121 on the bottom shell 111 is realized, so that the elastic pressing portion 132 of the elastic pressing plate 13 is aligned with the trigger key 122.

[0053] In one embodiment, the key assembly further includes a light guide 14. The circuit board assembly 12 also has a light source 123, which is a lamp bead electronic component, and the light source 123 is electrically connected to the circuit board body 121. The light guide 14 is mounted on the elastic pressing portion 132, and a trigger platform 141 is provided on the light guide 14. The trigger hole 114 and the trigger key 122 are both located on the moving path of the trigger platform 141. When the elastic pressing portion 132 is pressed, the light guide 14 moves with the elastic pressing portion 132 and approaches the trigger key 122, and finally the trigger platform 141 abuts against the trigger key 122 to complete the trigger action.

[0054] In one embodiment, the elastic pressing plate 13 is a metal plate, and the metal plate is elastic. The elastic pressing plate 13 has a first side surface 134 and a second side surface 135, which are arranged in sequence from top to bottom, and the first side surface 134 and the second side surface 135 are separated from each other, the first side surface 134 is arranged upward, and the first side surface is arranged downward, and the elastic pressing plate 13, the panel, and the bottom shell 111 are arranged in sequence from top to bottom. A pressing gap 16 is formed between the second side surface 135 and the panel of the base 11, and a fitting groove 136 is provided on the second side surface 135, and a light-transmitting hole connected to the fitting groove 136 is provided on the first side surface 134, and the light guide sheet 14 is clamped in the fitting groove 136, and the triggering platform 141 is located in the pressing gap 16. The light-transmitting hole is formed on the elastic pressing plate 13 by laser engraving, and the light of the light source 123 is transmitted from the light-transmitting hole by the light guide sheet 14, so that the user can operate the key assembly in a dark environment. In addition, a fluorescent strip may also be provided on the elastic pressing plate 13 .

[0055] The elastic pressing plate 13 is a metal elastic arm structure, and the elastic pressing plate 13 is fastened to the bottom shell 111 by screws, so that the step difference between the elastic pressing plate 13 and the base 11 and the pressing gap 16 are extremely small, while ensuring the feel of the elastic pressing plate 13, the pressing gap 16 can also be kept uniform.

[0056] In one embodiment, the base 11 has a third side surface 115 and a bottom surface 116, the third side surface 115 and the bottom surface 116 are arranged in sequence from top to bottom, the third side surface 115 and the bottom surface 116 are away from each other, the third side surface 115 is set upward, and the bottom surface 116 is set in a direction, and the bottom surface 116 is a plane, which is convenient for installation on a wall or the like. The first side surface 134, the second side surface 135, the third side surface 115, and the bottom surface 116 are arranged in sequence from top to bottom, and a pressing gap 16 is formed between the second side surface 135 and the third side surface 115. The elastic pressing plate 13 is an arc plate, and the first side surface 134, the second side surface 135, and the third side surface 115 are all arc surfaces with the same or similar curvatures. The distance between the connecting portion 131 and the bottom surface 116 is greater than the distance between the elastic pressing portion 132 and the bottom surface 116. In this way, the elastic pressing portion 132 is closer to the base 11, and the user can press along the first side surface 134 toward the elastic pressing portion 132 close to the base 11, making it easier, more labor-saving and more convenient to press the elastic pressing plate 13. Even in a dark environment, the elastic pressing portion 132 of the elastic pressing plate 13 can be quickly found and pressed along the first side surface 134.

[0057] Optionally, a communication connector 15 electrically connected to the circuit board body 121 is also installed on the bottom shell 111. The circuit board body 121 is connected to electronic components such as lamps through the communication connector 15, so that the key assembly can control the electronic components such as lamps.

[0058] In one embodiment, when there is only one elastic pressing portion 132 of the elastic pressing plate 13, the control command can be switched by repeatedly pressing the elastic pressing portion 132. For example, pressing the elastic pressing portion 132 once is an open command, pressing the elastic pressing portion 132 again is a close command, and pressing the elastic pressing portion 132 again is an open command, and this is repeated continuously.

[0059] Optionally, for ease of manipulation, the elastic pressing plate 13 of the present application has two elastic pressing parts 132, and the connecting part 131 is located between the two elastic pressing parts 132. There are multiple elastic pressing plates 13, trigger holes 114, and trigger keys 122, and the multiple elastic pressing parts 132, the multiple trigger holes 114, and the multiple trigger keys 122 correspond one to one.

[0060] Multiple elastic pressing plates 13 are directly fixed by connecting parts 17, so that multiple elastic pressing plates 13 are maintained on the same surface, reducing the step difference between the elastic pressing plates 13. Under the limiting effect of the bottom shell 111, the consistency of the pressing gap 16 is ensured, and at the same time, it will not cause key jamming or loosening problems.

[0061] In addition, in other embodiments, there may be more than two elastic pressing parts 132, and the more than two elastic pressing parts 132 are arranged circumferentially around the connecting part 131. One elastic pressing plate 13 can realize more control methods. Compared with the seesaw structure with an axis set up, which has only two control methods, the control methods of the present application are richer.

[0062] This embodiment also provides a switch, including the above-mentioned key assembly. The switch includes a power switch, a preselection switch, a limit switch, a control switch, a conversion switch, an isolating switch, a travel switch, a wall switch, an intelligent fire protection switch, etc.

[0063] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A button assembly, characterized in that: include: A base (11) having a receiving cavity (113) and a trigger hole (114); the receiving cavity (113) is in communication with the outside of the base (11) through the trigger hole (114); A circuit board assembly (12) is arranged in the accommodating cavity (113); the circuit board assembly (12) has a trigger key (122); An elastic pressing plate (13) comprising a connecting portion (131) and an elastic pressing portion (132) capable of generating elastic deformation around the connecting portion (131); as well as Connector (17); The connecting portion (131) is connected to the base (11) via the connecting piece (17); a pressing gap (16) communicating with the trigger hole (114) is formed between the elastic pressing portion (132) and the base (11); and the elastic pressing portion (132) can contact the trigger key (122) through the trigger hole (114) when elastically deformed.

2. The key assembly according to claim 1, characterized in that: The base (11) comprises a bottom shell (111) and a cover (112) mounted on the bottom shell (111); the connecting member (17) has a threaded rod; the circuit board assembly (12) is mounted on the bottom shell (111); the trigger hole (114) is opened on the cover (112); a connecting block (133) is provided at the connecting portion (131); a connecting hole (117) is opened on the cover (112); the connecting block (133) passes through the connecting hole (117) and is connected to the base (11) through the threaded rod.

3. The key assembly according to claim 2, characterized in that: The bottom shell (111) has a mounting groove (118), the circuit board assembly (12) is arranged in the mounting groove (118), the connecting block (133) is provided with a first threaded hole, a positioning seat (119) is provided on the positioning inner wall of the mounting groove (118), the positioning seat (119) is provided with a second threaded hole (1191), and the connecting block (133) is connected to the positioning seat (119) by the threaded rod passing through the first threaded hole and the second threaded hole (1191).

4. The key assembly according to claim 3, characterized in that: The positioning seat (119) is provided with a positioning groove (1192), and the positioning groove (1192) extends along the radial direction of the second threaded hole (1191). The positioning groove (1192) has a bottom wall (1193), a first positioning inner wall (1194) and a second positioning inner wall (1195). The first positioning inner wall (1194) and the second positioning inner wall (1195) are arranged opposite to each other and are both connected to the bottom wall (1193). The second threaded hole (1191) is opened on the bottom wall (1193) of the positioning groove (1192) and is connected to the outside of the bottom shell (111). The connecting block (133) is inserted into the positioning groove (1192), and the bottom wall (1193), the first positioning inner wall (1194) and the second positioning inner wall (1195) are all in contact with the connecting block (133).

5. The key assembly according to claim 4, characterized in that: The circuit board assembly (12) further comprises a circuit board body (121), the trigger key (122) is mounted on the circuit board body (121) and is electrically connected to the circuit board body (121), and the circuit board body (121) is provided with an avoidance groove (124) for the positioning seat (119) to pass through.

6. The key assembly according to any one of claims 1 to 5, characterized in that: It also comprises a light guide sheet (14); the circuit board assembly (12) further comprises a light source (123); the light guide sheet (14) is mounted on the elastic pressing portion (132); a trigger platform (141) is provided on the light guide sheet (14); the trigger hole (114) and the trigger key (122) are both located on the moving path of the trigger platform (141).

7. The key assembly according to claim 6, characterized in that: The elastic pressing plate (13) is a metal plate. The elastic pressing plate (13) has a first side surface (134) and a second side surface (135). The first side surface (134) and the second side surface (135) are opposed to each other. The pressing gap (16) is formed between the second side surface (135) and the base (11). An engaging groove (136) is provided on the second side surface (135). A light-transmitting hole connected to the engaging groove (136) is provided on the first side surface (134). The light guide sheet (14) is clamped in the engaging groove (136). The trigger platform (141) is located in the pressing gap (16).

8. The key assembly according to claim 7, characterized in that: The base (11) has a third side surface (115) and a bottom surface (116), the third side surface (115) and the bottom surface (116) are opposite to each other, the first side surface (134), the second side surface (135), the third side surface (115), and the bottom surface (116) are arranged in sequence, and the pressing gap (16) is formed between the second side surface (135) and the third side surface (115), the elastic pressing plate (13) is an arc plate, the first side surface (134), the second side surface (135), and the third side surface (115) are all arc surfaces with the same curvature, and the distance between the connecting portion (131) and the bottom surface (116) is greater than the distance between the elastic pressing portion (132) and the bottom surface (116).

9. The key assembly according to any one of claims 1 to 5, characterized in that: The elastic pressing plate (13) has two elastic pressing parts (132), and the connecting part (131) is located between the two elastic pressing parts (132); There are multiple elastic pressing plates (13), multiple trigger holes (114), and multiple trigger keys (122), and the multiple elastic pressing portions (132), the multiple trigger holes (114), and the multiple trigger keys (122) correspond one to one.

10. A switch, characterized in that: Comprising a key assembly as described in any one of claims 1 to 9.

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