Switch assembly

Abstract

The embodiment of the utility model provides a switch assembly, and relates to the technical field of switch design, and the switch assembly comprises a substrate, a circuit board, a knob cap, and a light guide part. The base body is provided with a through hole, the circuit board is connected with the base body and provided with a knob switch element and a light-emitting element, a rotary shaft of the knob switch element penetrates through the through hole, the knob cap is connected with the end, away from the circuit board, of the rotary shaft, and a rotary control portion of the knob cap is located on the side, away from the circuit board, of the base body. A light-transmitting area is arranged between the rotary control part and the side face, away from the circuit board, of the base body. The light guide part is sleeved in the through hole and sleeved outside the knob switch element, the light guide part is provided with a light incident part and a light emergent part, the light-emitting element faces the light incident part, and the light emergent part faces the light-transmitting area, so that light emitted by the light-emitting element penetrates through the light guide part and is emitted through the light-transmitting area.

Description

Technical Field

[0001] The present application relates to the technical field of switch design, and in particular to a switch assembly. Background Art

[0002] A switch is a very common control device. Exemplarily, the switch includes a knob switch, a push switch, and the like. A knob switch generally includes a knob switch element and a knob cap. The knob cap is connected to the rotating shaft of the knob switch element, so that the rotating shaft of the knob switch element can be driven to rotate by driving the knob cap to rotate. In the prior art, the knob switch cannot emit light during operation, so that the knob switch cannot meet the usage requirements of some specific scenarios. For example, in a night environment, users sometimes turn on the light by operating a rotary switch. However, when the indoor light is dim, it may be difficult for the user to find the position of the rotary switch, which leads to the problem of inconvenience in operating the rotary switch. Utility Model Content

[0003] The embodiment of the present application provides a switch assembly to solve the problem that a knob switch cannot emit light during operation and cannot meet the usage requirements of some specific scenarios.

[0004] The switch assembly provided in the embodiment of the present application includes: a base, a circuit board, a knob cap and a light guide; the base is provided with a through hole, the circuit board is connected to the base, a knob switch element and a light emitting element are provided on the circuit board, a rotating shaft of the knob switch element is passed through the through hole, the knob cap is connected to the end of the rotating shaft away from the circuit board, a rotating control portion of the knob cap is located on a side of the base away from the circuit board, and a light-transmitting area is provided between the rotating control portion and the side of the base away from the circuit board; the light guide is sleeved in the through hole and outside the knob switch element, the light guide is provided with a light input portion and a light output portion, the light emitting element faces the light input portion, and the light output portion faces the light-transmitting area, so that the light emitted by the light emitting element passes through the light guide and is emitted through the light-transmitting area.

[0005] Optionally, the light guide includes a main body portion, which extends in a direction from the circuit board toward the through hole, and is sleeved in the through hole and outside the knob switch element. Light injected through the light incident portion can pass through the main body and then be emitted toward the light exit portion.

[0006] Optionally, the light guide also includes a first protrusion, which is arranged at an end of the main body away from the knob cap, and the first protrusion protrudes in a radial direction away from the rotation axis along the rotation axis, and the surface of the first protrusion away from the rotation axis forms the light incident portion.

[0007] Optionally, a first reflecting surface is provided at one end of the light guide member facing away from the knob cap, and the first reflecting surface is used to reflect the light incident through the light incident portion to the main body; a second reflecting surface is provided at one end of the light guide member facing away from the circuit board, and the second reflecting surface is used to reflect the light incident into the main body to the light exit portion.

[0008] Optionally, the light guide further includes a second protruding portion, the second protruding portion protrudes laterally from an outer wall of the main body, and the second protruding portion is connected to a side of the base body facing the circuit board.

[0009] Optionally, the light guide also includes a third protrusion, which extends laterally from the inner wall of the main body, and the knob cap is provided with a first elastic hook, and the main body is sleeved outside the first elastic hook; the first elastic hook is provided with a fourth protrusion extending laterally toward the main body, and the first elastic hook can be elastically deformed in a direction away from the main body so that the first elastic hook can be located between the third protrusion and the circuit board.

[0010] Optionally, a third reflective surface is provided on the base at a position located at the periphery of the perforation, and the third reflective surface is provided on a side of the base opposite to the circuit board. The third reflective surface is an annular surface, and the opening of the third reflective surface gradually increases in a direction from the circuit board toward the perforation, and the light incident portion faces the third reflective surface.

[0011] Optionally, the knob cap includes a knob ring and a connector that are connected to each other, the connector is provided with a plug-in interface, the end of the rotating shaft facing away from the circuit board is plugged into the plug-in interface, the knob ring is sleeved outside the connector, and the rotation control part is provided on the knob ring.

[0012] Optionally, the connecting body is provided with a second elastic hook and an abutment surface, the second elastic hook is provided with a fifth protrusion extending laterally toward the knob ring, and the second elastic hook can be elastically deformed in a direction away from the knob ring so that the knob ring can be clamped between the abutment surface and the fifth protrusion along the axial direction of the rotating shaft.

[0013] Optionally, there are multiple light-emitting elements, and the multiple light-emitting elements are distributed at intervals along the periphery of the light incident portion.

[0014] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects:

[0015] In an embodiment of the present application, when power is supplied to the circuit board and the light-emitting element is in a light-emitting state, the light emitted by the light-emitting element can pass through the light guide disposed between the perforated hole wall and the knob switch element and be emitted through the light-transmitting area. In this way, the user can observe the light emitted through the light-transmitting area when using the electrical appliance equipped with the switch assembly. For example, in a dark environment, the user can determine the position of the knob cap based on the light emitted through the light-transmitting area, thereby facilitating the manipulation of the knob cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of a switch assembly provided in an embodiment of the present application;

[0018] Figure 2 An exploded schematic diagram of a switch assembly provided in an embodiment of the present application;

[0019] Figure 3 A cross-sectional view of a switch assembly provided in an embodiment of the present application;

[0020] Figure 4 for Figure 3 A partial schematic diagram of a switch assembly shown in FIG.

[0021] Figure 5 A schematic diagram of a switch assembly provided in an embodiment of the present application, showing a situation where a knob cap is hidden;

[0022] Figure 6 A schematic diagram of a substrate and a light guide provided in an embodiment of the present application;

[0023] Figure 7 for Figure 6 An exploded schematic diagram of the substrate and the light guide shown in FIG.

[0024] Figure 8 A schematic diagram of a light guide provided in an embodiment of the present application;

[0025] Fig. 9 A schematic diagram of a light guide provided in an embodiment of the present application from another angle;

[0026] Fig.10 A schematic diagram of a knob cap provided in an embodiment of the present application;

[0027] Fig.11 for Fig.10 An exploded schematic diagram of the knob cap shown in FIG.

[0028] Fig.12 A schematic diagram of a knob ring provided in an embodiment of the present application.

[0029] Description of reference numerals:

[0030] 100- switch assembly;

[0031] 110-substrate; 111-perforation; 112-third reflection surface;

[0032] 120-circuit board; 121-knob switch element; 1211-rotating shaft; 122-light emitting element;

[0033] 130-knob cap; 131-rotation control part; 132-first elastic hook; 1321-fourth protruding part;

[0034] 130a-knob ring; 131a-eighth protrusion; 132a-first side portion; 133a-second side portion; 134a-stop surface;

[0035] 130b-connector; 131b-insertion interface; 132b-second elastic hook; 1321b-fifth protruding portion; 133b-butt surface; 134b-sixth protruding portion; 135b-seventh protruding portion;

[0036] 140 - light guide; 141 - light incident portion; 142 - light emitting portion; 143 - first reflection surface; 144 - second reflection surface;

[0037] 140a-main body; 140b-first protruding portion; 140c-second protruding portion; 140d-third protruding portion;

[0038] 150-light-transmitting area. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article.

[0042] Furthermore, it is required that the present application be understood not only by the actual terms used but also by the meanings connoted by each term.

[0043] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0044] The present application embodiment provides a switch assembly. Figures 1 to 12 The switch assembly 100 provided in the embodiment of the present application includes: a base 110 , a circuit board 120 , a knob cap 130 and a light guide 140 .

[0045] refer to Figures 2 to 4 , the base 110 is provided with a through hole 111. The circuit board 120 is connected to the base 110. Exemplarily, the circuit board 120 can be connected to the base 110 by a screw fastener. The circuit board 120 is provided with a knob switch element 121 and a light emitting element 122. The rotation axis 1211 of the knob switch element 121 is passed through the through hole 111. The knob cap 130 is connected to the end of the rotation axis 1211 away from the circuit board 120.

[0046] The rotation control part 131 of the knob cap 130 is located on the side of the base 110 away from the circuit board 120, and a light-transmitting area 150 is provided between the rotation control part 131 and the side of the base 110 away from the circuit board 120. It should be noted that the rotation control part 131 is used for the user to pinch it with fingers to drive the knob cap 130 to rotate.

[0047] The light guide 140 is sleeved in the through hole 111 and sleeved outside the knob switch element 121. In other words, the light guide 140 is disposed between the hole wall of the through hole 111 and the knob switch element 121. The light guide 140 is provided with a light input portion 141 and a light output portion 142. The light emitting element 122 faces the light input portion 141, and the light output portion 142 faces the light transmission area 150, so that the light emitted by the light emitting element 122 passes through the light guide 140 and is emitted through the light transmission area 150.

[0048] In this way, in the embodiment of the present application, when the circuit board 120 is powered and the light-emitting element 122 is in a light-emitting state, the light emitted by the light-emitting element 122 can pass through the light guide 140 disposed between the hole wall of the through hole 111 and the knob switch element 121, and be emitted through the light-transmitting area 150. In this way, the user can observe the light emitted through the light-transmitting area 150 when using the electrical appliance equipped with the switch assembly 100. For example, in a dark environment, the user can determine the position of the knob cap 130 based on the light emitted through the light-transmitting area 150, so as to facilitate the operation of the knob cap 130.

[0049] In addition, illustratively, the light intensity or color of the light emitting element 122 can change with the rotation of the rotating shaft 1211, so that the working state of the electrical appliance equipped with the switch assembly 100 can be determined by judging the intensity or color of the light emitted through the light-transmitting area 150. It should be noted that the implementation of this application is mainly used to solve the problem of how to enable the switch assembly 100 to emit light. As for how to adjust the light intensity or color of the light emitting element 122 based on the rotation of the rotating shaft 1211, it is not the focus of the discussion of the embodiments of this application. Therefore, the specific solution to this problem will not be introduced here.

[0050] It should also be noted that the solution of how to adjust the light intensity or color of the light emitting element 122 based on the rotation of the rotating shaft 1211 can be purchased from the corresponding technical service provider. Of course, since there is a solution for adjusting the light intensity or color of the light emitting element 122 based on the rotation of the rotating shaft 1211 in the prior art, those skilled in the art can also refer to relevant materials and develop the technology by themselves during the implementation of the solution.

[0051] Exemplarily, the knob switch element 121 includes a rotary encoder. Alternatively, the knob switch element 121 includes a rotary encoder with a pressing function. It should be noted that the rotary encoder with a pressing function can send a signal corresponding to a rotation operation during the rotation of the rotating shaft; and can send a signal corresponding to a pressing operation during the pressing of the rotating shaft. It should also be noted that the knob switch element is a very common switch element, and therefore, its specific structure and working principle will not be described in detail here. In addition, exemplarily, the light-emitting element 122 can be a light-emitting diode (LED) or a light bulb, etc.

[0052] refer to Figure 5 In some embodiments, there are multiple light emitting elements 122, and the multiple light emitting elements 122 are distributed along the periphery of the light incident portion 141. It can be understood that if the light emitting elements 122 are distributed more evenly, the light emitted through the light-transmitting area 150 will also be more evenly distributed.

[0053] refer to Figures 3 to 5 In some embodiments, the light guide 140 includes a main body 140a. The main body 140a extends in a direction from the circuit board 120 toward the through hole 111. The main body 140a is sleeved in the through hole 111 and sleeved outside the knob switch element 121. In other words, the main body 140a of the light guide 140 is disposed between the hole wall of the through hole 111 and the knob switch element 121. The light incident through the light incident portion 141 can pass through the main body 140a and then be emitted to the light emitting portion 142. In other words, the light emitted by the light emitting element 122 is incident into the main body 140a through the light incident portion 141, and then emitted to the light emitting portion 142.

[0054] refer to Figures 3 to 5 In some embodiments, the light guide 140 further includes a first protruding portion 140b. The first protruding portion 140b is disposed at an end of the main body 140a away from the knob cap 130, and the first protruding portion 140b protrudes in a direction away from the rotation axis 1211 along the radial direction of the rotation axis 1211. The surface of the first protruding portion 140b away from the rotation axis 1211 forms a light incident portion 141. In this way, the first protruding portion 140b is conveniently opposite to the light emitting element 122, so that light can be smoothly incident into the light guide 140 through the light incident portion 141.

[0055] refer to Figure 5 In some embodiments, when there are multiple light-emitting elements 122, the multiple light-emitting elements 122 are spaced apart along the periphery of the first protrusion 140b, and the light-emitting elements 122 are all facing the surface of the first protrusion 140b away from the rotation axis 1211.

[0056] refer to Figure 4 and Figure 8 In some embodiments, a first reflective surface 143 is provided at one end of the light guide 140 away from the knob cap 130. The first reflective surface 143 is used to reflect the light incident through the light incident portion 141 to the main body 140a. Exemplarily, the first reflective surface 143 is an annular surface, and the opening of the first reflective surface 143 gradually decreases along the direction from the circuit board 120 toward the base 110. Exemplarily, the shape of the cross section of the first reflective surface 143 along the axis passing through the main body 140a can be a straight line or an arc, etc.

[0057] refer to Figure 4 and Fig. 9, a second reflective surface 144 is provided at one end of the light guide 140 away from the circuit board 120. The second reflective surface 144 is used to reflect the light incident on the main body 140a to the light emitting portion 142. Exemplarily, the second reflective surface 144 is an annular surface, and the opening of the second reflective surface 144 gradually increases along the direction from the circuit board 120 toward the base 110. Exemplarily, the shape of the cross section of the second reflective surface 144 along the axis passing through the main body 140a can be a straight line or an arc, etc.

[0058] Exemplarily, the light guide 140 is made of a light-transmitting material. The present embodiment of the application does not limit the light transmittance of the material of the light guide 140, as long as it can transmit light. In addition, in order to enhance the reflective effect of the first reflective surface 143 and the second reflective surface 144, a reflective coating may be provided on the first reflective surface 143 and the second reflective surface 144.

[0059] refer to Figures 5 to 7 In some embodiments, the light guide 140 further includes a second protruding portion 140c. The second protruding portion 140c extends laterally from the outer wall of the main body 140a, and the second protruding portion 140c is connected to a side of the base 110 facing the circuit board 120. In this way, the light guide 140 can be stably connected to the base 110.

[0060] refer to Figure 3 , Figure 4 and Figure 8 In some embodiments, the light guide 140 further includes a third protruding portion 140d, and the third protruding portion 140d extends laterally from the inner wall of the main body 140a. Fig.10 The knob cap 130 is provided with a first elastic hook 132 . The main body 140 a is sleeved outside the first elastic hook 132 .

[0061] The first elastic hook 132 has a fourth protruding portion 1321 extending laterally toward the main body 140a. The first elastic hook 132 can be elastically deformed in a direction away from the main body 140a so that the first elastic hook 132 can be located between the third protruding portion 140d and the circuit board 120.

[0062] In this way, when the knob cap 130 is mounted on the rotating shaft 1211 of the knob switch element 121, the knob cap 130 can be pressed to make the knob cap 130 dock with the rotating shaft 1211. In addition, when the knob cap 130 and the rotating shaft 1211 are crimped, the first elastic hook 132 can be elastically deformed so that the fourth protrusion 1321 can be hooked on the third protrusion 140d, so that the knob cap 130 will not be easily separated from the rotating shaft 1211.

[0063] refer to Figure 2 and Figure 4In some embodiments, a third reflective surface 112 is provided on the substrate 110 at a position around the perforation 111. The third reflective surface 112 is provided on the side of the substrate 110 that is away from the circuit board 120. The third reflective surface 112 is an annular surface. The opening of the third reflective surface 112 gradually increases in the direction from the circuit board 120 toward the perforation 111, and the light incident portion 141 faces the third reflective surface 112. Exemplarily, the shape of the cross section of the third reflective surface 112 along the axis passing through the perforation 111 can be a straight line or an arc. In addition, in order to enhance the reflective effect of the third reflective surface 112, a reflective coating can be provided on the third reflective surface 112.

[0064] refer to Figures 10 to 12 In some embodiments, the knob cap 130 includes a knob ring 130a and a connector 130b connected to each other. The connector 130b is provided with an insertion port 131b. Figure 3 The end of the rotating shaft 1211 away from the circuit board 120 is plugged into the plug port 131b. The knob ring 130a is sleeved outside the connecting body 130b, and the rotating control part 131 is disposed on the knob ring 130a.

[0065] In this way, the knob ring 130a and the connector 130b of the knob cap 130 can be made into a split structure, so that the knob ring 130a and the connector 130b can be made of suitable materials respectively. For example, the knob ring 130a can be made of metal material, so that the durability of the knob ring 130a can be improved. The connector 130b can be made of plastic material to reduce the production cost of the knob cap 130. In addition, it is convenient to process an elastic hook structure on the connector 130b, so that the knob ring 130a and the connector 130b can be connected by elastic snap connection. Of course, it can be understood that in other embodiments, the knob cap 130 can also be set as an integrated structure.

[0066] refer to Figure 4 , Figures 10 to 12 In some embodiments, the connecting body 130b is provided with a second elastic hook 132b and abutting surface 133b. The second elastic hook 132b is provided with a fifth protrusion 1321b extending laterally toward the knob ring 130a, and the second elastic hook 132b can be elastically deformed in a direction away from the knob ring 130a, so that the knob ring 130a can be clamped between the abutting surface 133b and the fifth protrusion 1321b along the axial direction of the rotating shaft 1211.

[0067] In this way, during the process of connecting the knob ring 130a and the connecting body 130b, the knob ring 130a and the connecting body 130b can be brought closer to each other, so that the second elastic hook 132b is elastically deformed, so that the second elastic hook 132b is hooked to the side of the knob ring 130a facing the base 110. Therefore, the knob ring 130a can be clamped between the abutting surface 133b and the fifth protruding portion 1321b along the axial direction of the rotating shaft 1211.

[0068] refer to Fig.11 The connecting body 130b is provided with a sixth protruding portion 134b and a seventh protruding portion 135b protruding toward the knob ring 130a, and the sixth protruding portion 134b and the seventh protruding portion 135b are arranged at intervals along the circumference of the connecting body 130b. Fig.12 The knob ring 130a is provided with an eighth protrusion 131a protruding toward the connecting body 130b. When the knob ring 130a and the connecting body 130b are in a connected state, the eighth protrusion 131a is sandwiched between the sixth protrusion 134b and the seventh protrusion 135b along the circumferential direction of the knob ring 130a.

[0069] Further, refer to Fig.11 In the axial direction of the connecting body 130b, the sixth protrusion 134b protrudes from the seventh protrusion 135b in the direction close to the base 110. Exemplarily, when the connecting body 130b is arranged vertically, the bottom end of the sixth protrusion 134b is lower than the bottom end of the seventh protrusion 135b. Fig.12 , along the circumference of the knob ring 130a, the side portions of the knob ring 130a located on both sides of the eighth protrusion 131a are respectively the first side portion 132a and the second side portion 133a. The first side portion 132a is provided with a first avoidance area, and the second side portion 133a is provided with a second avoidance area. The first avoidance area is used to accommodate the sixth protrusion 134b, and the second avoidance area is used to accommodate the seventh protrusion 135b. The second avoidance area is provided with a stop surface 134a facing the end of the seventh protrusion 135b. Therefore, during the installation of the knob ring 130a, if the seventh protrusion 135b faces the stop surface 134a, the seventh protrusion 135b is abutted against the stop surface 134a, so that the knob ring 130a cannot be pressed in, so as to prevent the knob ring 130a from being incorrectly installed on the connecting body 130b.

[0070] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0071] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the embodiments of the present application, and the scope of the embodiments of the present application is defined by the appended claims and their equivalents.

Claims

1. A switch assembly, characterized in that: include: A base (110), a circuit board (120), a knob cap (130) and a light guide (140); The base (110) is provided with a through hole (111); the circuit board (120) is connected to the base (110); a knob switch element (121) and a light-emitting element (122) are provided on the circuit board (120); a rotation axis (1211) of the knob switch element (121) is passed through the through hole (111); the knob cap (130) is connected to the end of the rotation axis (1211) facing away from the circuit board (120); a rotation control portion (131) of the knob cap (130) is located on a side of the base (110) facing away from the circuit board (120); and a light-transmitting area (150) is provided between the rotation control portion (131) and a side of the base (110) facing away from the circuit board (120); The light guide (140) is sleeved in the through hole (111) and sleeved outside the knob switch element (121). The light guide (140) is provided with a light input portion (141) and a light output portion (142). The light emitting element (122) faces the light input portion (141), and the light output portion (142) faces the light transmission area (150), so that the light emitted by the light emitting element (122) passes through the light guide (140) and is emitted through the light transmission area (150).

2. The switch assembly according to claim 1, characterized in that The light guide (140) comprises a main body (140a), the main body (140a) extending in a direction from the circuit board (120) toward the through hole (111), the main body (140a) being sleeved in the through hole (111) and sleeved outside the knob switch element (121), and light incident through the light incident portion (141) can pass through the main body (140a) and then be emitted toward the light emitting portion (142).

3. The switch assembly according to claim 2, characterized in that: The light guide (140) further comprises a first protruding portion (140b), wherein the first protruding portion (140b) is arranged at an end of the main body (140a) away from the knob cap (130), the first protruding portion (140b) protrudes in a radial direction of the rotation axis (1211) in a direction away from the rotation axis (1211), and a surface of the first protruding portion (140b) away from the rotation axis (1211) forms the light incident portion (141).

4. The switch assembly according to claim 2, characterized in that: A first reflecting surface (143) is provided at one end of the light guide (140) that is away from the knob cap (130), and the first reflecting surface (143) is used to reflect light incident through the light incident portion (141) to the main body (140a); A second reflection surface (144) is provided at one end of the light guide (140) facing away from the circuit board (120), and the second reflection surface (144) is used to reflect light incident on the main body (140a) to the light emitting portion (142).

5. The switch assembly according to claim 2, characterized in that: The light guide (140) further comprises a second protruding portion (140c), the second protruding portion (140c) protruding laterally from the outer wall of the main body (140a), and the second protruding portion (140c) is connected to a side of the base (110) facing the circuit board (120).

6. The switch assembly according to claim 2, characterized in that: The light guide (140) further comprises a third protruding portion (140d), the third protruding portion (140d) protruding laterally from the inner wall of the main body (140a), the knob cap (130) is provided with a first elastic hook (132), and the main body (140a) is sleeved outside the first elastic hook (132); The first elastic hook (132) is provided with a fourth protruding portion (1321) extending laterally toward the main body (140a), and the first elastic hook (132) is capable of elastically deforming in a direction away from the main body (140a), so that the first elastic hook (132) can be located between the third protruding portion (140d) and the circuit board (120).

7. The switch assembly according to claim 1, characterized in that The base (110) is provided with a third reflection surface (112) at a position located at the periphery of the through hole (111); the third reflection surface (112) is provided on a side of the base (110) that is away from the circuit board (120); the third reflection surface (112) is an annular surface; the opening of the third reflection surface (112) gradually increases in a direction from the circuit board (120) toward the through hole (111); and the light incident portion (141) faces the third reflection surface (112).

8. The switch assembly according to claim 1, characterized in that The knob cap (130) comprises a knob ring (130a) and a connecting body (130b) connected to each other, the connecting body (130b) being provided with a plug-in interface (131b), the end of the rotating shaft (1211) facing away from the circuit board (120) being plugged into the plug-in interface (131b), the knob ring (130a) being sleeved outside the connecting body (130b), and the rotating control portion (131) being provided on the knob ring (130a).

9. The switch assembly according to claim 8, characterized in that The connecting body (130b) is provided with a second elastic hook (132b) and an abutting surface (133b); the second elastic hook (132b) is provided with a fifth protrusion (1321b) extending laterally toward the knob ring (130a); the second elastic hook (132b) can be elastically deformed in a direction away from the knob ring (130a) so that the knob ring (130a) can be clamped between the abutting surface (133b) and the fifth protrusion (1321b) along the axial direction of the rotating shaft (1211).

10. The switch assembly according to claim 1, characterized in that The number of the light-emitting elements (122) is plural, and the plurality of light-emitting elements (122) are distributed at intervals along the periphery of the light-injecting portion (141).

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