Waterproof structure of tubular motor

Abstract

The utility model discloses a waterproof structure of a tubular motor, which comprises an outer shell of the tubular motor and a circuit board mounting piece arranged on the outer shell, and waterproof materials are filled between the outer shell and the circuit board mounting piece. According to the utility model, targeted water prevention is carried out on the circuit board mounting piece, so that the circuit part is not easily influenced by rainwater or moisture, the overall stability of the electric curtain is further improved, and the service life of the electric curtain is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to tubular motor technical field especially relates to a waterproof structure of tubular motor and electric curtain. BACKGROUND

[0002] Current electric curtain, such as roller shutter door curtain, electric curtain can adopt tubular motor as its power component, and the tubular motor is internally provided with circuit board and other components. The current tubular motor is provided with a layer of waterproof material at the opening gap of the shell body to achieve a certain waterproof effect.

[0003] However, the current part of tubular motor needs to be applied in outdoor working conditions, and rainwater can easily penetrate the waterproof material into the space where the circuit board is located, so that the circuit part is easily affected by rainwater or moisture, thereby affecting the stability of the electric curtain as a whole and shortening its service life. UTILITY MODEL CONTENTS

[0004] The utility model provides a waterproof structure of tubular motor and electric curtain to solve the problem that the waterproof material of the current tubular motor is arranged at the opening gap of the shell body, and the waterproof effect is limited.

[0005] The utility model embodiment provides a waterproof structure of tubular motor, which comprises a shell body of a tubular motor, a circuit board mounting piece arranged on the shell body, and a waterproof material filled between the shell body and the circuit board mounting piece.

[0006] Further, the shell body comprises an inner wall surface, the circuit board mounting piece comprises an outer wall surface, and the waterproof material comprises a first waterproof piece filled between the inner wall surface of the shell body and the outer wall surface of the circuit board mounting piece.

[0007] Further, the first waterproof piece comprises a first waterproof gasket, and the inner wall surface of the shell body and the outer wall surface of the circuit board mounting piece are further provided with a limiting structure for arranging the first waterproof gasket.

[0008] Further, the limiting structure comprises a first groove body opened on the outer wall surface of the circuit board mounting piece, the first waterproof gasket is arranged in the first groove body, and the first waterproof gasket is in interference fit with the shell body and the circuit board mounting piece.

[0009] Further, the circuit board mounting piece comprises a cylindrical body, the outer wall surface of the circuit board mounting piece is formed on the outer wall surface of the cylindrical body, the circuit board mounting piece further comprises a mounting part in the interior of the cylindrical body, and the mounting part is used for fixing the circuit board.

[0010] Further, the waterproof structure further comprises a waterproof connector, the circuit board mounting member further comprises an outer end face arranged on the outer side of the cylindrical body, a through groove is arranged on the outer end face for arranging the waterproof connector, at least part of the waterproof connector is corresponding to the cross section outer contour of the through groove, and a wire slot is further formed in the waterproof connector.

[0011] Further, the through groove is arranged in the middle of the outer end face, and a plurality of reinforcing structures are further formed on the radial periphery of the through groove, the reinforcing structures are located on the outer side of the outer end face, and the mounting portion is located on the inner side of the outer end face.

[0012] Further, the waterproof connector comprises a base and a connector body extending inwardly from the base, the connector body comprises a mounting head extending into the inside of the cylindrical body, and further comprises a transition portion connected between the mounting head and the base, and the mounting head is used for arranging a resistance-rebound sensing component matched with the circuit board.

[0013] Further, the waterproof material further comprises a second waterproof member filled between the inner wall surface of the through groove and the transition portion.

[0014] Further, the second waterproof member comprises a second waterproof gasket, a second groove is further arranged on the outer wall surface of the transition portion, the second waterproof gasket is arranged in the second groove, and the second waterproof gasket is in interference fit with the waterproof connector and the circuit board mounting member.

[0015] Further, the outer shell comprises a cylinder and an opening located on one side of the cylinder, the waterproof structure further comprises a resistance-rebound assembly arranged at the opening of the outer shell, a gap is formed between the resistance-rebound assembly and the opening of the outer shell, and the circuit board mounting member is located on the inner side of the gap.

[0016] Further, the resistance-rebound assembly comprises an end cover and a rotating sleeve located on the outer side of the end cover, and the gap is formed between the opening of the outer shell and the rotating sleeve.

[0017] Further, the waterproof material further comprises a third waterproof member filled between the inner wall surface of the outer shell and the rotating sleeve.

[0018] Further, the third waterproof member comprises a third waterproof gasket, a third groove is further arranged on the outer wall surface of the rotating sleeve, the third waterproof gasket is arranged in the third groove, and the third waterproof gasket is in interference fit with the outer shell and the rotating sleeve.

[0019] The utility model discloses another aspect still provides a kind of electric curtain, the electric curtain includes tubular motor, the tubular motor further includes the waterproof structure of any one of the tubular motor described above.

[0020] The utility model discloses an electric circuit board mounting piece is arranged on the shell body, and the waterproof material is filled between the shell body and the electric circuit board mounting piece. The waterproof material of the embodiment can be relatively far from the shell body opening, mainly to the electric circuit board mounting piece targeted waterproof, so that the circuit part is not easily affected by rain or moisture, and the stability of the electric curtain is improved, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be briefly introduced the drawing needed to be used in the embodiment description, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0022] Figure 1 It is the sectional view of the front view angle of the tubular motor in the second embodiment of the utility model, the section is located at the vertical plane, and is located at the shell body axis, and the waterproof structure is shown in the drawing;

[0023] Figure 2 It is Figure 1 The sectional view of the perspective view, the shell body is hidden, and part of the wire passing through the shell body axis is also hidden, and the space where the wire is hidden is filled with solid sealing element;

[0024] Figure 3 It is the perspective view of one view angle of the waterproof sealing element and end cover and resistance rebound sensing component assembly in the second embodiment of the utility model;

[0025] Figure 4 It is Figure 3 The same view angle of the explosion view;

[0026] Figure 5 It is the perspective view of one view angle of the circuit board mounting piece of the second embodiment of the utility model;

[0027] Figure 6 It is the perspective view of another view angle of the circuit board mounting piece of the second embodiment of the utility model;

[0028] Figure 7 It is the perspective view of the waterproof sealing element in the second embodiment of the utility model;

[0029] Figure 8 It is the perspective view of the rotating sleeve in the second embodiment of the utility model;

[0030] Figure 9 It is the perspective view of the waterproof connecting piece in the third embodiment of the utility model, and the waterproof sealing material is hidden in the drawing;

[0031] Figure 10 is the sectional view of the front view angle of the waterproof connecting piece assembled in the tubular motor in the third embodiment of the utility model, the section is located at the vertical plane and is located at the central axis of the waterproof connecting piece. DETAILED DESCRIPTION

[0032] In order to make the technical problem, technical scheme and beneficial effect solved by the utility model more clearly, the utility model is further described in detail below in combination with drawings and examples.It should be understood that the specific examples described herein are only used to explain the utility model and not used to limit the utility model.

[0033] When the utility model embodiment refers to "first", "second" and the like ordinal numbers, unless according to the context, it expresses the order of meaning, should be understood as merely for distinguishing.

[0034] In the description of the utility model, it is necessary to explain that, unless another explicit provision and limitation, the term "installation", "connection", "connection" should be broad-sense understanding, for example, can be fixed connection, can be detachable connection or integrally connected;Can be mechanical connection, can be electrical connection;It can be directly connected, can be indirectly connected through the intermediate medium, can be the intercommunication of two elements.For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0035] First embodiment:

[0036] The embodiment provides a waterproof structure of tubular motor, including the shell of tubular motor, still including the circuit board mounting piece arranged on the shell, still filled with waterproof material between the shell and the circuit board mounting piece.

[0037] In the embodiment, the shell of tubular motor and circuit board mounting piece are square cylinder, the shell is sleeved on the periphery of circuit board mounting piece, the circuit board and corresponding circuit element are arranged in the circuit board mounting piece, the shell and circuit board mounting piece are open at both ends, and the waterproof material is filled on both sides of the shell and circuit board mounting piece.The waterproof material includes but is not limited to gasket, gasket or waterproof rubber plug etc.The material of waterproof material can be rubber, solidified silica gel, epoxy resin, stearate or amide curing agent.

[0038] The utility model embodiment provides the circuit board mounting piece arranged on the shell, and fills the waterproof material between the shell and the circuit board mounting piece, so that the waterproof material of the embodiment can be relatively far from the opening of the shell, mainly targeted waterproof for the circuit board mounting piece, so that the circuit part is not easily affected by rain or moisture, thereby improving the stability of the electric curtain as a whole, prolonging its service life.

[0039] Second embodiment:

[0040] Please refer to Figures 1 to 8 The waterproof structure of the tubular motor provided by the embodiment includes an outer shell 1 of the tubular motor, and further includes a circuit board mounting member 2 arranged on the outer shell 1. The outer shell 1 and the circuit board mounting member 2 are filled with waterproof material.

[0041] As a specific solution but not limitation, the outer shell 1 includes a cylindrical barrel and an opening on one side of the barrel. The other side of the outer shell 1 is closed. The outer shell 1 forms an inner wall surface at the barrel. The circuit board mounting member 2 includes an outer wall surface. The waterproof material includes a first waterproof member filled between the inner wall surface of the outer shell and the outer wall surface of the circuit board mounting member.

[0042] In the embodiment, the circuit board mounting member 2 includes a cylindrical body 21, which is in a whole cylindrical shape. Both ends of the cylindrical circuit board mounting member 2 are provided with openings.

[0043] As a specific solution but not limitation, the first waterproof member includes a first waterproof gasket 31. A limiting structure for arranging the first waterproof gasket 31 is further arranged between the inner wall surface of the outer shell and the outer wall surface of the circuit board mounting member. Specifically, the limiting structure includes a first groove 22 opened on the outer wall surface of the circuit board mounting member. The first waterproof gasket 31 is arranged in the first groove 22 and is in interference fit with the outer shell 1 and the circuit board mounting member 2.

[0044] As a specific solution but not limitation, the outer wall surface of the circuit board mounting member 2 is formed on the outer wall surface of the cylindrical body 21. The circuit board mounting member 2 further includes a mounting portion inside the cylindrical body 21. The mounting portion is used for fixing a circuit board 4. In the embodiment, the mounting portion can be two clamping grooves 23 arranged on the inner wall surface of the cylindrical body. The two clamping grooves 23 are oppositely arranged and extend in the length direction of the cylindrical body 21, so as to facilitate the circuit board 4 to be inserted or extracted along the clamping grooves 23 in the length direction of the cylindrical body 21.

[0045] As a preferred solution but not limitation, the waterproof structure further includes a waterproof connecting member 5. The circuit board mounting member 2 further includes an outer end surface arranged on the outer side of the cylindrical body 21. A through groove 24 is opened on the outer end surface and is used for arranging the waterproof connecting member 5. At least part of the waterproof connecting member 5 corresponds to the cross-sectional outer contour of the through groove 24 in cross section. A wiring groove 51 is further formed in the middle of the waterproof connecting member 5. The waterproof material further includes a solidified sealing member 34 filled in the wiring groove 51.

[0046] In the embodiment, the cured sealant 34 can be cured silicone, which is used to fill the gap between the wire slot 51 in the waterproof connector 5 and the wire 8, and to play a waterproof effect while fixing the wire 8. It should be noted that in some other embodiments, the cured sealant 34 can also be an epoxy resin, a stearate or an amide curing agent.

[0047] For example, the wire slot 51 of the waterproof connector 5 is used to introduce the wire 8 of the tubular motor end cover 6 into the inside of the circuit board mounting 2, so as to supply power to the circuit board 4. The cross-sectional outer contour referred to in the embodiment is the outer contour of the corresponding structure obtained by taking a cross section perpendicular to the axis of the cylindrical outer housing. It should be noted that in the embodiment, in order to improve the assembly efficiency and structural strength, the size and shape of the through slot 24 and the cross-sectional outer contour of the waterproof connector 5 in the above-mentioned axial direction are variable.

[0048] As a preferred but not limited solution, the through slot 24 is formed in the middle of the outer end face, and a plurality of reinforcing structures 25 are formed on the radial periphery of the through slot 24, the reinforcing structures 25 being located on the outer side of the outer end face, and the mounting portion of the circuit board 4 being located on the inner side of the outer end face.

[0049] Specifically, the waterproof connector 5 includes a base 52 and a connector body extending inwardly from the base 52, the connector body including a mounting head 54 extending into the inside of the cylindrical body 21, and a transition portion 53 connected between the mounting head 54 and the base 52, the mounting head 54 being used to set a resistance-rebound sensing component cooperating with the circuit board 4.

[0050] Specifically, the resistance-rebound sensing component provided on the mounting head 54 is a shielding portion 9, the shielding portion 9 including a ring body 91 provided on the mounting head 54, and a shielding body 92 extending from the ring body 91 to both sides, and the circuit board 4 is provided with a sensing portion 41 corresponding to the shielding portion 9, the sensing portion 41 including a "U"-shaped sensing head symmetrically provided on the circuit board, and the position of the "U"-shaped sensing head corresponding to the position of the shielding body 92 on the same side.

[0051] As a preferred but not limited solution, the wire slot 51 is formed in the middle of the base 52 and the connector body, specifically, one end of the wire slot 51 is provided in the middle of the base 52, and the other end of the wire slot 51 is provided in the middle of the mounting head 54.

[0052] Further, the waterproof material further comprises a second waterproof element filled between the inner wall surface of the through groove 24 and the transition portion 53. Specifically, the second waterproof element comprises a second waterproof gasket 32, and a second groove body 531 is further formed on the outer wall surface of the transition portion 53, the second waterproof gasket 32 is arranged in the second groove body 531, and the second waterproof gasket 32 is in interference fit with the waterproof connecting piece 5 and the circuit board mounting piece 2.

[0053] As a preferred but non-limiting solution, the waterproof structure further comprises a resistance-rebound assembly arranged at the opening of the outer shell 1, a gap is formed between the resistance-rebound assembly and the opening of the outer shell 1, and the circuit board mounting piece 2 is located inside the gap.

[0054] Specifically, the resistance-rebound assembly comprises an end cover 6 and a rotating sleeve 7 sleeved outside the end cover 6, and the gap is formed between the opening of the outer shell 1 and the rotating sleeve 7. In this embodiment, the end cover 6 is fixedly arranged, the rotating sleeve 7 is sleeved outside the end cover 6 and can rotate relative to the end cover 6 when resistance occurs, and the end cover 6 and the rotating sleeve 7 are provided with elastic reset elements in the circumferential direction to facilitate reset operation when relative rotation occurs. Meanwhile, the waterproof connecting piece 5 is fixed relative to the end cover 6 by screws, and the circuit board mounting piece 2 is fixed relative to the rotating sleeve 7 by screws, so that the resistance-rebound sensing component on the mounting head 54 and the circuit board 4 can rotate relative to each other when resistance occurs, and the “U”-shaped sensing head on one side of the sensing portion 41 is shielded by the shielding portion 9 to detect the resistance action of the tubular motor.

[0055] Further, the waterproof material further comprises a third waterproof element filled between the inner wall surface of the outer shell and the rotating sleeve 7. Specifically, the third waterproof element comprises a third waterproof gasket 33, and a third groove body 71 is further formed on the outer wall surface of the rotating sleeve 7, the third waterproof gasket 33 is arranged in the third groove body 71, and the third waterproof gasket 33 is in interference fit with the outer shell 1 and the rotating sleeve 7.

[0056] Through the above structure, the circuit board mounting piece 2 can be as far as possible from the opening of the outer shell 1, so as to avoid rainwater from entering the inside of the circuit board mounting piece 2, and meanwhile, the third waterproof element is arranged between the inner wall surface of the outer shell 1 and the rotating sleeve 7, so as to form a multi-layer waterproof structure from outside to inside, and further enhance the waterproof performance of the tubular motor of this embodiment, and ensure the working stability of the tubular motor in outdoor working conditions.

[0057] In this embodiment, the first waterproof element, the second waterproof element and the third waterproof element can be rubber gaskets, the number of the first waterproof element and the second waterproof element is two, and the number of the third waterproof element is one, and correspondingly, the first groove body 22 and the second groove body 531 comprise two annular groove bodies arranged in parallel, and the third groove body 71 comprises one annular groove body.

[0058] The utility model discloses an embodiment of close to circuit board part meets the resistance rebound induction component setting on waterproof connecting piece, simultaneously, waterproof connecting piece includes the wire slot, and the wire slot is used for with the cavity intercommunication of tubular motor end cover, to make the wire through the cavity enter the wire slot, still fill with solidified sealing piece in the wire slot. Make the wire can enter the space of circuit board at waterproof connecting piece, and fill solidified sealing piece in the wire slot, make solidified sealing piece can completely close the gap between wire and wire slot, make the space of circuit board and external space pass through waterproof sealing material and close, can play good waterproof effect, further guarantee the working stability of tubular motor in outdoor working condition, prolong the service life of electric curtain.

[0059] Third embodiment:

[0060] Please refer to Figure 9 And Figure 10 It is shown that the utility model provides a waterproof structure of tubular motor, and different from the first embodiment, the cross section of the base 13' of the waterproof connecting piece of the embodiment is oval.

[0061] Specifically, the base 13' includes a top and a bottom symmetrically arranged, and also includes a side symmetrically arranged, the top of the base includes a first transition curve 21' and a second transition curve 22' connected with the two sides of the first transition curve 21', the curvature of the first transition curve 21' is greater than that of the second transition curve 22', and the curvature of the side is greater than that of the second transition curve 22'.

[0062] The embodiment adopts the base structure of approximate oval, and by arranging the first transition curve 21' and the second transition curve 22' connected with the two sides of the first transition curve 21' on the bottom and the top of the base 13', the structural strength of the waterproof connecting piece can be effectively enhanced, and the overall structural stability of the assembled tubular motor is better.

[0063] As a preferred scheme but not limited, different from the first embodiment, the waterproof connecting piece of the embodiment further includes a wire distribution slot 111', the wire distribution slot 111' is communicated with the wire slot 11', and the opening of the wire distribution slot 111' is at least partially opened on the periphery of the waterproof connecting piece.

[0064] Specifically, the opening of the branch slot 111' is at least partially formed on the side wall surface of the connecting member body. Further, the opening of the branch slot 111' is formed at the connection between the connecting member body and the base 13'. As a preferred but not limited solution, the opening at the connection of the branch slot 111' includes a transverse opening 111a' penetrating through the base 13', and also includes a longitudinal opening 111b' penetrating through the connecting member body, and the waterproof sealing material 12' is arranged on the inner side of the longitudinal opening, so that the wire branch 31' is arranged. Since the wire branch 31' can directly extend outward through the branch slot from the middle of the connecting member body, the wire branch 31' is located on the inner side of the base, avoiding the wire branch 31' on the outer side of the base 13' in the first embodiment, so that the limiting protrusion 23 of the end cover 2' does not need to leave a space for the wire branch 31', which is beneficial to arranging more resistance rebound structures to enhance the rebound force and improve the overall resistance rebound effect of the tubular motor.

[0065] Fourth embodiment:

[0066] The utility model embodiment provides a tubular motor, the tubular motor still includes the waterproof structure of the above first to third embodiment.

[0067] The utility model embodiment provides a circuit board mounting piece arranged on the outer shell, and a waterproof material is filled between the outer shell and the circuit board mounting piece. The waterproof material of the embodiment can be relatively far away from the opening of the outer shell, mainly for the waterproof of the circuit board mounting piece, so that the circuit part is not easily affected by rain or moisture, thereby improving the stability of the electric curtain as a whole and prolonging the service life.

[0068] Fifth embodiment:

[0069] The utility model embodiment provides an electric curtain, including a tubular motor, the tubular motor still includes the waterproof structure of the above first to third embodiment.

[0070] The utility model embodiment provides a circuit board mounting piece arranged on the outer shell, and a waterproof material is filled between the outer shell and the circuit board mounting piece. The waterproof material of the embodiment can be relatively far away from the opening of the outer shell, mainly for the waterproof of the circuit board mounting piece, so that the circuit part is not easily affected by rain or moisture, thereby improving the stability of the electric curtain as a whole and prolonging the service life.

[0071] The above only is the preferred embodiment of the utility model, and does not use to limit the utility model. Any modification, equivalent replacement and improvement etc. that are made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A waterproof structure of a tubular motor including an outer case of a tubular motor, characterized by, The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

2. The waterproof structure of a tubular motor according to claim 1, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

3. The waterproof structure of a tubular motor according to claim 2, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

4. The waterproof structure of a tubular motor according to claim 3, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

5. The waterproof structure of a tubular motor according to any one of claims 1 to 4, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

6. The waterproof structure of a tubular motor according to claim 5, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

7. The waterproof structure of a tubular motor according to claim 6, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

8. The waterproof structure of a tubular motor according to claim 7, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

9. The waterproof structure of a tubular motor according to claim 8, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

10. The waterproof structure of a tubular motor according to claim 9, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

11. The waterproof structure of a tubular motor according to any one of claims 1 to 4, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

12. The waterproof structure of a tubular motor according to claim 11, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

13. The waterproof structure of a tubular motor according to claim 12, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece.

14. The waterproof structure of a tubular motor according to claim 13, wherein The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece. The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece. The waterproof structure further comprises a waterproof connecting piece, and the circuit board mounting piece further comprises an outer end face arranged outside the cylindrical body, and a through groove is arranged on the outer end face for arranging the waterproof connecting piece. 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