Structure with waterproof knob switch and hair trimmer

Abstract

The invention relates to the field of hair trimmers, and discloses a structure with a waterproof knob switch and a hair trimmer. The rotary switch comprises a shell, a rotary switch and a circuit board, the rotary switch comprises a rotary piece and a conducting strip, the conducting strip and the rotary piece are connected in a clamped mode to form a modular design, and the circuit board and the conducting strip are both located in the shell; the rotating piece is rotationally connected to the shell in a penetrating mode, the end, away from the conducting strip, of the rotating piece protrudes out of the shell for operation, and a first sealing piece is arranged between the rotating piece and the shell and used for sealing the matching position of the rotating piece and the shell; when the rotating piece rotates, the conducting strip is driven to rotate synchronously, so that the matching position of the conducting strip and the circuit board is switched, and switching of a circuit on the circuit board between a connected state and a disconnected state is achieved. The device is low in cost, and the waterproof sealing performance is improved through multiple sealing structures; the rotating piece and the conducting strip are connected in a clamping manner to form a module, so that the assembly is more convenient; and the safety of the rotary switch is improved.

Description

Technical Field

[0001] This invention relates to the field of hair trimmer technology, and more specifically, to a structure and hair trimmer with a waterproof rotary switch. Background Technology

[0002] Most existing hair trimmers use push-pull sliding switches. Consequently, the hair trimmer's casing needs to have a long, narrow through-hole to allow the sliding key that works with the push-pull sliding switch to move. This results in poor sealing, allowing dust and moisture to easily enter the hair trimmer through the long, narrow through-hole. This can affect the circuit board or the electrode springs on the push-pull sliding switch that work with the circuit board, thus impacting the lifespan of the hair trimmer. Summary of the Invention

[0003] To address at least one of the aforementioned problems, the present invention first provides a structure with a waterproof rotary switch, comprising a housing, a rotary switch, and a circuit board. The rotary switch includes a rotating component and a conductive plate, the conductive plate being snap-fitted to the rotating component to form a modular design. Both the circuit board and the conductive plate are located within the housing. The rotating component is rotatably connected through the housing, with one end of the rotating component away from the conductive plate protruding from the housing for operation. A first sealing element is provided between the rotating component and the housing to seal the mating area between the rotating component and the housing. When the rotating component rotates, it drives the conductive plate to rotate synchronously, thereby switching the mating position between the conductive plate and the circuit board, realizing the switching of the circuit on the circuit board between a connected state and a disconnected state.

[0004] Optionally, the housing is provided with a rotating hole for the rotating component to be inserted, the first sealing component is sleeved on the rotating component, and the outer peripheral wall of the first sealing component is in close contact with the hole wall of the rotating hole.

[0005] Optionally, the circuit board has two contacts spaced apart on the side near the conductive sheet. After the conductive sheet is rotated, it is adapted to contact the two contacts so that the circuit on the circuit board is connected.

[0006] Optionally, the outer wall of the rotating component is fixedly provided with a tactile protrusion, and the housing is provided with a plurality of tactile grooves. The plurality of tactile grooves are arranged at intervals around the circumference of the rotating component. When the rotating component rotates, the tactile protrusion is adapted to rotate into the corresponding tactile groove to generate operation feedback.

[0007] Optionally, the rotating component has a mounting groove on its side wall, the mounting groove extends radially through the rotating component, and the side of the mounting groove closest to the circuit board extends through the rotating component. The conductive sheet is disposed in the mounting groove, and two opposite groove walls of the mounting groove are fixedly provided with snap-fit ​​limiting protrusions. The conductive sheet is snapped and limited within the mounting groove by the snap-fit ​​limiting protrusions.

[0008] Optionally, the conductive sheet can slide along the axial direction of the rotating member within the mounting groove. The rotary switch further includes an elastic member located on the side of the conductive sheet away from the circuit board. The two ends of the elastic member abut against the conductive sheet and the groove wall of the mounting groove, respectively, to drive the conductive sheet to always tend to move closer to the snap-fit ​​limiting protrusion.

[0009] Optionally, a guide post is fixedly provided on the wall of the mounting groove, and the conductive sheet is slidably sleeved on the guide post.

[0010] Optionally, the housing includes an outer shell, an inner core support, and a top cover. The top of the outer shell has an installation opening. The circuit board is mounted on the inner core support. The inner core support is inserted into the outer shell through the installation opening. The inner core support or the inner wall of the outer shell has a first sealing ring located on the side of the circuit board near the installation opening. The rotating component is rotatably connected to the top cover, and the top cover is connected to the top of the inner core support.

[0011] Optionally, a first sleeve is fixedly provided on the inner core support, the circuit board is located below the first sleeve, a second sleeve is fixedly provided on the upper cover, the rotating component is inserted into the second sleeve, the second sleeve is inserted into the first sleeve, and a second sealing element is provided on the first sleeve or the second sleeve, the second sealing element being adapted to seal the mating part of the first sleeve and the second sleeve.

[0012] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0013] 1. Rotary switches achieve switching by rotation. When the rotating part rotates, only one rotation hole is needed on the housing to achieve rotation in place, without the need for extra space. It is easier to lay out in a limited space. Only a simple first sealing element is needed at the rotating part to achieve the sealing function, which improves waterproof sealing and reduces cost.

[0014] 2. After the inner core support is installed inside the outer shell, a seal is formed by the first sealing ring, making it difficult for moisture to seep in from between the inner core support and the outer shell. At the same time, the second sleeve is inserted into the first sleeve to form a partition, and the first sealing element seals the partition, forming a double sealing structure, which effectively prevents moisture from entering the conductive sheet and the circuit board, further improving the waterproof sealing performance.

[0015] 3. The rotating component and conductive plate in the rotary switch are connected by snap-fit ​​to form a module, which makes assembly more convenient;

[0016] 4. Under the action of the elastic element, the conductive sheet forms a floating connection with the rotating part. When the conductive sheet rotates and comes into contact with the contact on the circuit board, it will float up under the action of the elastic element and make tight and stable contact with the contact under the action of the elastic element. While ensuring stable contact between the conductive sheet and the contact, it also reduces the wear of the conductive sheet and the contact, and improves the service life of the product.

[0017] 5. When the rotating part rotates, the cooperation between the tactile protrusion and the tactile groove can provide tactile feedback. At the same time, the first seal and the tactile protrusion can provide double damping, which restricts the degree of freedom of the rotating part and improves the safety of the rotary switch.

[0018] In addition, the present invention provides a hair trimmer, including the structure with a waterproof rotary switch as described above.

[0019] Compared to existing technologies, the hair trimmer described in this invention has the same advantages as the structure with a waterproof knob switch described above, and will not be repeated here. Attached Figure Description

[0020] Figure 1 An explosion of a structure with a waterproof rotary switch as described in an embodiment of the present invention. Figure 1 ;

[0021] Figure 2 An explosion of a structure with a waterproof rotary switch as described in an embodiment of the present invention. Figure 2 ;

[0022] Figure 3 An explosion of a structure with a waterproof rotary switch as described in an embodiment of the present invention. Figure 3 ;

[0023] Figure 4 This is a cross-sectional view of the structure with a waterproof rotary switch in an embodiment of the present invention;

[0024] Figure 5 This is a structural diagram of the rotary switch in an embodiment of the present invention;

[0025] Figure 6 This is a structural diagram of the inner core support in an embodiment of the present invention;

[0026] Figure 7 This is a structural diagram of the circuit board and rotary switch in an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Circuit board; 12. Outer shell; 13. Inner core support; 131. First sealing ring; 132. Snap-fit ​​plate; 14. Top cover; 141. Top cover; 15. Bottom cover; 151. Second sealing ring; 16. Partition plate; 17. First sleeve; 18. Second sleeve; 181. Tactile groove; 19. Second seal; 2. Rotary switch; 21. Rotating component; 211. Mounting groove; 212. Guide post; 213. Snap-fit ​​limiting protrusion; 214. Tactile protrusion; 22. Conductive sheet; 23. Rotary knob; 24. Elastic component; 25. First seal. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the following description is provided in conjunction with the accompanying drawings. Figure 1-7 This application will be described in further detail.

[0029] In a first aspect, embodiments of the present invention provide a structure with a waterproof rotary switch, referring to... Figure 1 The waterproof rotary switch comprises a housing 1 and a rotary switch 2. A circuit board 11 is housed within the housing 1. The rotary switch 2 is rotatably mounted on the housing 1. Rotating the rotary switch 2 connects or disconnects the circuitry on the circuit board 11, thereby causing the product to operate or stop. The rotary switch 2 rotates in place, requiring no extra space. Furthermore, the housing 1 and the rotary switch 2 are equipped with multiple sealing structures to prevent moisture or dust from entering the circuit board 11 or the mating area between the rotary switch 2 and the circuit board 11, thus improving the waterproof performance of the rotary switch 2 and the product.

[0030] Reference Figure 2 and Figure 3 The housing 1 includes an outer shell 12, an inner core support 13, an upper cover 14, and a bottom cover 15. A circuit board 11 is inserted and fixedly mounted on the inner core support 13. A lithium battery and a motor are also mounted on the inner core support 13, both electrically connected to the circuit board 11. When the rotary switch 2 activates the circuit on the circuit board 11, the lithium battery powers the motor to operate. The outer shell 12 is a cylindrical body with openings at both the top and bottom. The opening at the top of the outer shell 12 serves as the mounting opening. The inner core support 13 is inserted into the outer shell 12 through the mounting opening, and the bottom cover 15 is inserted into the outer shell 12 through the opening at the bottom of the outer shell 12. The bottom cover 15 is fixedly connected to the inner core support 13 by bolts, thus forming a detachable structure. This facilitates assembly during production and disassembly during maintenance. The top cover 14 is snapped onto the top of the inner core bracket 13. The rotary switch 2 is rotated and mounted on the top cover 14. The top cover 14 is also equipped with a hair trimmer head. The motor is connected to the hair trimmer head to drive the hair trimmer head to rotate.

[0031] Reference Figures 2 to 7In one embodiment, a first sealing ring 131 is tightly fitted onto the inner core support 13, and the circuit board 11 is located below the first sealing ring 131. The outer peripheral wall of the first sealing ring 131 abuts tightly against the inner peripheral wall of the outer shell 12, thereby forming a seal and preventing moisture or dust from seeping between the inner core support 13 and the outer shell 12 into the location of the circuit board 11, thus improving the sealing performance. In another embodiment, the inner wall of the outer shell 12 is provided with an annular groove, and the first sealing ring 131 is located in the annular groove. After the inner core support 13 is inserted into the outer shell 12, the first sealing ring 131 is fitted onto the inner core support 13 to form a seal. A second sealing ring 151 is tightly fitted onto the bottom cover 15, and the outer peripheral wall of the second sealing ring 151 abuts tightly against the inner peripheral wall of the outer shell 12 to form a seal, preventing moisture or dust from seeping between the inner core support 13 and the bottom cover 15 into the location of the circuit board 11, further improving the sealing performance. Both the bottom cover 15 and the inner core support 13 are provided with protruding edges. Thus, after the bottom cover 15 and the inner core support 13 are connected together by bolts, they cannot move relative to the outer shell 12 in the vertical direction, which improves the stability and sealing after assembly.

[0032] Reference Figures 2 to 5 The rotary switch 2 includes a rotating component 21, a conductive sheet 22, and a rotary knob 23. The conductive sheet 22 and the rotating component 21 are snap-fitted together to form a module, improving the ease of assembly. The rotating component 21 is rotatably connected to the upper cover 14. One side of the conductive sheet 22 and the rotating component 21 is located below the upper cover 14 and inserted into the inner core support 13 to cooperate with the circuit board 11. The top of the upper cover 14 has a rotating hole that penetrates the upper cover 14 itself. The other side of the rotating component 21 is inserted into the rotating hole and exposed on the top of the upper cover 14 for operation. The rotary knob 23 is located on the top of the upper cover 14. The rotary knob 23 is sleeved on the rotating component 21 and rotates synchronously with the rotating component 21. The outer diameter of the rotary knob 23 is larger than the outer diameter of the rotating component 21, which facilitates operation by driving the rotary knob 23 to drive the rotating component 21 to rotate. When the rotating component 21 rotates, it will drive the conductive sheet 22 to rotate synchronously, thereby connecting or disconnecting the circuit on the circuit board 11.

[0033] The rotating component 21 has a mounting groove at the location of the rotating hole. A first sealing element 25 is tightly fitted inside the mounting groove. The outer peripheral wall of the first sealing element 25 abuts tightly against the wall of the rotating hole to form a seal, preventing moisture or dust from seeping into the circuit board 11 through the mating area between the rotating component 21 and the rotating hole. In this embodiment, the first sealing element 25 is preferably an O-ring. In another embodiment, the first sealing element 25 can also be a packing made of PTFE material. In yet another embodiment, the first sealing element 25 can be installed on the wall of the rotating hole and then tightly fitted onto the rotating component 21.

[0034] Reference Figures 2 to 5The rotating component 21 has a mounting groove 211 on its side wall, which extends radially through the rotating component 21, with the side of the mounting groove 211 closest to the circuit board 11. A guide post 212 is integrally formed on the groove wall of the mounting groove 211 away from the circuit board 11. The conductive sheet 22 is inserted into the mounting groove 211 and slidably mounted on the guide post 212. The guide post 212 prevents the conductive sheet 22 from detaching radially from the opening of the mounting groove 211. Two opposite groove walls of the mounting groove 211 closest to the circuit board 11 are integrally formed with snap-fit ​​limiting protrusions 213. The conductive sheet 22 is snapped and limited within the mounting groove 211 by the snap-fit ​​limiting protrusions 213, making it difficult for the conductor board to detach from the opening of the mounting groove 211 closest to the circuit board 11. Both snap-fit ​​limiting protrusions 213 have guide slopes on the side near the circuit board 11. When installing the conductive sheet 22, the opposite sides of the conductive sheet 22 first abut against the guide slopes, and then the conductive sheet 22 is pushed forcefully so that the conductive sheet 22 passes through the snap-fit ​​limiting protrusions 213 and is located above the snap-fit ​​protrusions. During this process, the conductive sheet 22 is sleeved on the guide post 212, thereby enabling the conductive sheet 22 and the rotating part 21 to achieve snap-fit ​​connection to form a module.

[0035] The conductive sheet 22 can slide along the axial direction of the rotating member 21 on the guide post 212 within the mounting groove 211. The rotary switch 2 also includes an elastic member 24, located on the side of the conductive sheet 22 away from the circuit board 11. The elastic member 24 is sleeved on the guide post 212, with its two ends abutting against the conductive sheet 22 and the groove wall of the mounting groove 211, respectively, to drive the conductive sheet 22 to always tend to move closer to the locking and limiting protrusion 213, thereby ensuring the stability of the engagement between the conductive sheet 22 and the circuit board 11. In this embodiment, the elastic member 24 is preferably a spring; in another embodiment, the elastic member 24 can be a wave-shaped spring sheet.

[0036] Reference Figures 2 to 7 The conductive sheet 22 and the mounting groove 211 are bent into conductive feet on both sides opposite to the radial opening of the rotating part 21. The conductive feet are L-shaped plates that protrude from the mounting groove 211. The bottom surface of the conductive feet is located below the side of the rotating part 21. The two conductive feet contact the circuit board 11 to drive the circuit on the circuit board 11 to connect or disconnect.

[0037] Reference Figures 2 to 6Furthermore, a partition plate 16 is integrally formed on the inner core support 13. The partition plate 16 is located above the circuit board 11, thereby separating the circuit board 11. A first sleeve 17 is integrally formed on the top of the partition plate 16. The partition plate 16 is provided with a through hole and a through hole spaced apart. The through hole is used for the motor shaft to be inserted. The upper cover 14 can cover the through hole to improve the sealing effect. The through hole is located in the first sleeve 17. The rotating part 21 is inserted into the through hole so that it can cooperate with the circuit board 11, thereby reducing the area of ​​the circuit board 11 exposed to the air and reducing the seepage of water vapor into the circuit board 11 from other positions of the inner core support 13, further improving the waterproof performance.

[0038] Reference Figures 2 to 6 Two contacts are spaced apart on the side of the circuit board 11 near the conductive sheet 22. These two contacts are located within the projection range of the inner diameter of the first sleeve 17. Therefore, when the conductive sheet 22 rotates and both conductive legs contact the two contacts respectively, the circuit on the circuit board 11 is connected. The conductive sheet 22 forms a floating connection with the rotating member 21 under the action of the elastic member 24. When the conductive sheet 22 rotates and contacts the contacts on the circuit board 11, it floats up under the action of the elastic member 24 and tightly abuts against the contacts, reducing wear on the conductive sheet 22 and contacts and improving the product's service life. A second sleeve 18 is integrally formed at the bottom of the top cover 14. The rotating hole is located inside the second sleeve 18, and the rotating member 21 is also inserted into the second sleeve 18. The second sleeve 18 is inserted into the first sleeve 17, and a second sealing member 19 is tightly fitted onto the second sleeve 18. The outer peripheral wall of the second sealing member 19 tightly abuts against the inner peripheral wall of the first sleeve 17, thereby sealing the mating area between the first sleeve 17 and the second sleeve 18. After the second sleeve 18 is inserted into the first sleeve 17, it forms a partition. The first sealing member 25 seals this partition, forming a double sealing structure. This effectively prevents moisture from entering the conductive sheet 22 and the circuit board 11, further improving the waterproof sealing performance. In this embodiment, the second sealing member 19 is preferably a sealing ring. In another embodiment, the second sealing member 19 can be PTFE packing.

[0039] Reference Figures 2 to 5The rotating component 21 has two tactile protrusions 214 integrally formed on its outer wall, evenly spaced circumferentially, within the second sleeve 18. The inner wall of the second sleeve 18 has four tactile grooves 181 evenly spaced circumferentially, all penetrating the second sleeve 18. The rotating component 21, under the action of the tactile protrusions 214, tightly engages with the second sleeve 18, creating a damping sensation without affecting its rotation. When the rotating component 21 is rotated so that the two conductive legs abut against the two contacts, the two tactile protrusions 214 are located within their respective tactile grooves 181; when neither conductive leg is in contact with the contacts, the two tactile protrusions 214 are located within the other two tactile grooves 181, thus generating operational feedback. It is worth noting that each tactile protrusion 214 has transition slopes along both edges in the direction of rotation, ensuring smooth rotation when it exits its corresponding tactile groove 181 without jamming.

[0040] Reference Figures 2 to 6 The inner core support 13 has multiple snap-fit ​​plates 132 spaced apart on its top circumference. The inner circumferential wall of the upper cover 14 has snap-fit ​​grooves that are the same number as the snap-fit ​​plates 132 and correspond one-to-one. The snap-fit ​​plates 132 cooperate with the snap-fit ​​grooves to make the upper cover 14 and the inner core support 13 snap-fit ​​connected, which improves the convenience of assembly and is also more convenient for maintenance and disassembly.

[0041] Reference Figure 1 The top cover 141 is fitted and snapped onto the upper cover 14. The rotary switch 2 and the blade are both located inside the top cover 141 and covered to prevent dust from entering the blade or accidentally activating the rotary switch 2 when not in use. Specifically, the outer peripheral wall of the upper cover 14 is provided with multiple connecting slots spaced apart circumferentially, and the inner peripheral wall of the top cover 141 is provided with snap-fit ​​protrusions that are the same number as the connecting slots and correspond one-to-one.

[0042] The implementation principle of a waterproof rotary switch structure in this application embodiment is as follows: The rotary switch 2 achieves switching by rotation. When the rotating component 21 rotates, only one rotation hole is needed on the housing 1 to achieve rotation in place, without requiring extra space, making it easier to arrange in a limited space. Only a simple first sealing element 25 is needed at the rotating component 21 to achieve a sealing effect, improving waterproof sealing. After the inner core support 13 is installed inside the outer shell 12, a seal is formed by the first sealing ring 131, making it difficult for moisture to seep in from between the inner core support 13 and the outer shell 12. At the same time, the second sleeve 18 is inserted into the first sleeve 17 to form a partition, and the first sealing element 25 seals this partition, forming a double sealing structure, effectively preventing moisture from entering the conductive sheet 22 and the location of the circuit board 11, further improving waterproof sealing.

[0043] Secondly, another embodiment of the present invention provides a hair trimmer, including the structure with a waterproof rotary switch described in the first aspect above.

[0044] Similarly, the components included in the "components," "mechanisms," and "devices" of this disclosure can also be flexibly combined. They can be modularly produced according to actual needs and assembled as an independent module; or they can be assembled separately to form a module in this device. The division of the above-mentioned components in this disclosure is only one embodiment for ease of reading and is not intended to limit the scope of protection of this disclosure. Any technical solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this disclosure.

[0045] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0046] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0048] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A structure with a waterproof rotary switch, characterized in that: The device includes a housing (1), a rotary switch (2), and a circuit board (11). The rotary switch (2) includes a rotating component (21) and a conductive plate (22). The conductive plate (22) is snapped into the rotating component (21) to form a modular design. The circuit board (11) and the conductive plate (22) are both located inside the housing (1). The rotating component (21) is rotatably connected to the housing (1). One end of the rotating component (21) away from the conductive plate (22) protrudes from the housing (1) for operation. A first sealing element (25) is provided between the rotating component (21) and the housing (1). The first sealing element (25) is used to seal the mating point between the rotating component (21) and the housing (1). When the rotating component (21) rotates, it drives the conductive plate (22) to rotate synchronously to switch the mating position of the conductive plate (22) and the circuit board (11), thereby switching the circuit on the circuit board (11) between a connected state and a disconnected state.

2. The structure with a waterproof rotary switch according to claim 1, characterized in that: The housing (1) is provided with a rotating hole for the rotating member (21) to be inserted. The first sealing member (25) is sleeved on the rotating member (21), and the outer peripheral wall of the first sealing member (25) is in close contact with the hole wall of the rotating hole.

3. The structure with a waterproof rotary switch according to claim 1, characterized in that: The circuit board (11) has two contacts spaced apart on the side near the conductive sheet (22). After the conductive sheet (22) rotates, it is adapted to contact the two contacts so that the circuit on the circuit board (11) is connected.

4. The structure with a waterproof rotary switch according to claim 1, characterized in that: The outer wall of the rotating component (21) is fixedly provided with a tactile protrusion (214), and the housing (1) is provided with a plurality of tactile grooves (181). The plurality of tactile grooves (181) are arranged circumferentially on the rotating component (21). When the rotating component (21) rotates, the tactile protrusion (214) is adapted to rotate into the corresponding tactile groove (181) to generate operation feedback.

5. The structure with a waterproof rotary switch according to claim 1, characterized in that: The rotating component (21) has a mounting groove (211) on its side wall. The mounting groove (211) passes through the rotating component (21) radially and passes through the rotating component (21) on the side of the mounting groove (21) closest to the circuit board (11). The conductive sheet (22) is disposed in the mounting groove (211). The two opposite groove walls of the mounting groove (211) are fixedly provided with snap-fit ​​limiting protrusions (213). The conductive sheet (22) is snapped and limited in the mounting groove (211) by the snap-fit ​​limiting protrusions (213).

6. The structure with a waterproof rotary switch according to claim 5, characterized in that: The conductive sheet (22) can slide along the axial direction of the rotating member (21) within the mounting groove (211). The rotary switch (2) also includes an elastic member (24), which is located on the side of the conductive sheet (22) away from the circuit board (11). The two ends of the elastic member (24) abut against the conductive sheet (22) and the groove wall of the mounting groove (211) respectively, so as to drive the conductive sheet (22) to always have a tendency to move closer to the snap-fit ​​limiting protrusion (213).

7. The structure with a waterproof rotary switch according to claim 5, characterized in that: The mounting groove (211) has a guide post (212) fixedly installed on its wall, and the conductive sheet (22) is slidably sleeved on the guide post (212).

8. The structure with a waterproof rotary switch according to any one of claims 1-7, characterized in that: The housing (1) includes an outer shell (12), an inner core support (13), and a top cover (14). The top of the outer shell (12) is provided with an installation opening. The circuit board (11) is mounted on the inner core support (13). The inner core support (13) is inserted into the outer shell (12) at the installation opening. The inner core support (13) or the inner wall of the outer shell (12) is provided with a first sealing ring (131). The first sealing ring (131) is located on the side of the circuit board (11) near the installation opening. The rotating component (21) is rotatably connected to the top cover (14). The top cover (14) is connected to the top of the inner core support (13).

9. The structure with a waterproof rotary switch according to claim 8, characterized in that: The inner core support (13) is fixedly provided with a first sleeve (17), the circuit board (11) is located below the first sleeve (17), the upper cover (14) is fixedly provided with a second sleeve (18), the rotating part (21) is inserted into the second sleeve (18), the second sleeve (18) is inserted into the first sleeve (17), the first sleeve (17) or the second sleeve (18) is provided with a second sealing member (19), the second sealing member (19) is adapted to seal the mating part of the first sleeve (17) and the second sleeve (18).

10. A hair trimmer, characterized in that, Includes the structure with a waterproof rotary switch as described in any one of claims 1-9.

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