A waterproof structure for power supply

Abstract

A waterproof structure for a power supply includes an upper cover, a lower cover and a power cord, wherein an assembly hole is provided on the lower cover, and the power cord is sealed on the assembly hole; a buckle portion and an upper annular groove are provided on the upper cover, and a buckle fitting portion and a lower annular groove are provided on the lower cover, wherein the upper annular groove corresponds to the lower annular groove, and a bonding material is pre-placed between the two; the upper cover is mutually engaged with the buckle fitting portion of the lower cover through the buckle portion, and the bonding material is engaged with the upper and lower covers, and solidifies and seals the gap between the upper cover and the lower cover after a certain period of time. The present invention improves the stability of the upper cover and the lower cover after assembly by means of a buckle connection, and at the same time, utilizes the bonding material to adhere to the upper convex piece and the lower convex piece after solidification, so as to further improve the assembly firmness of the upper cover and the lower cover, and the bonding material can fill all gaps formed by the upper cover and the lower cover during assembly after solidification, and is combined with a variety of different sealing methods between the power cord and the lower cover to maximize the waterproofness of the power supply.

Description

Technical Field

[0001] The invention relates to a waterproof structure for a power source. Background Art

[0002] Chinese patent document number CN109890163A disclosed on June 14, 2019 a concave-convex kissing waterproof device, which includes a power supply shell with an inner cavity and wires arranged at both ends of the power supply shell, a connector is arranged on the wire, and wiring interfaces for accommodating the connector are arranged at both ends of the power supply shell, a first groove is opened on the inner wall surface of the wiring interface, a first protrusion matching the first groove is protruded from the joint, the first protrusion and the end face of the first groove abut against each other to fix the joint on the wiring interface, and waterproof glue is also smeared and filled between the joint and the wiring interface. It is said that the concave-convex kissing waterproof device is provided with mutually matching concave-convex structures through the wiring interface of the power supply housing and the joint of the wire, and waterproof glue is filled in the gap between the concave-convex structures. The grooves and convex blocks water vapor or moisture from directly entering the interior of the power supply housing through the wiring interface, which greatly improves the waterproof performance of the power supply and correspondingly improves the safety of the power supply; however, the lower housing and the upper housing are only connected by gluing, which is easy to get loose during use, affecting the service life of the product, and the lower housing and the upper housing must wait for the glue to solidify before moving, otherwise it will affect the assembly fit between the lower housing and the upper housing, resulting in low production efficiency. Therefore, further improvement is necessary. Summary of the invention

[0003] The purpose of the present invention is to provide a waterproof structure for a power supply which has a simple and reasonable structure, firm assembly, high production efficiency, long service life, good waterproof effect, low manufacturing cost, easy production and easy implementation, so as to overcome the shortcomings of the prior art.

[0004] A waterproof structure for a power supply designed for this purpose comprises an upper cover, a lower cover and a power cord, and is characterized in that: an assembly hole is provided on the upper cover or the lower cover, and the power cord is sealed and arranged on the assembly hole; a buckle portion and an upper annular groove are provided on the upper cover, and a buckle fitting portion and a lower annular groove are provided on the lower cover, wherein the upper annular groove and the lower annular groove correspond to each other, and a bond is pre-placed between the two; the upper cover is buckled with the buckle fitting portion of the lower cover through the buckle portion, and the bond is buckled with the upper and lower covers, and solidifies and seals and fits on the gap between the upper and lower covers after a certain period of time.

[0005] The upper annular groove is provided with a plurality of upper convex pieces, and the lower annular groove is provided with a plurality of lower convex pieces; the adhesive is clamped on the upper and lower covers, and after a certain period of time, it is solidified and sealed to fit on the gap between the upper annular groove and the lower annular groove, and solidified and attached to the upper convex pieces and the lower convex pieces.

[0006] The upper cover is provided with an upper inner wall, and the buckle part is provided on the upper inner wall; the lower cover is provided with a lower inner wall, and the buckle fitting part is provided on the lower inner wall; the upper inner wall is buckled with the buckle fitting part of the lower inner wall through the buckle part.

[0007] The upper cover is also provided with an upper outer wall, and an upper annular groove is formed between the upper outer wall and the upper inner wall; the lower cover is also provided with a lower outer wall, and a lower annular groove is formed between the lower outer wall and the lower inner wall.

[0008] An upper positioning step is provided on the upper outer wall, and a lower positioning step is provided on the lower outer wall. The upper outer wall and the lower outer wall are tightly attached to each other, and the two are positioned with each other by the cooperation of the upper positioning step and the lower positioning step; the adhesive is clamped at the upper and lower covers, and after a certain period of time, it solidifies and seals on the gap between the upper outer wall and the lower outer wall, and / or seals on the gap between the upper positioning step and the lower positioning step.

[0009] The upper inner wall and the lower outer wall are tightly attached to each other, the upper inner wall extends into the bottom of the lower annular groove, and / or the lower outer wall extends into the bottom of the upper annular groove; the adhesive is clamped on the upper and lower covers, and after a certain period of time, it solidifies and seals on the gap between the upper inner wall and the lower outer wall, and / or seals on the gap between the upper inner wall and the lower annular groove, and / or seals on the gap between the lower outer wall and the upper annular groove.

[0010] A cavity is provided between the upper cover and the lower cover, and a power board is provided in the cavity. The power board and the inner side of the snap-fitting part are mutually dependent, or a gap of less than 1 mm is formed between them; the power line is electrically connected to the power board.

[0011] The assembly hole is arranged on the lower cover, and a bayonet is arranged on it; a connector is integrally formed on the power cord, a screw-on portion is arranged on the connector, and the connector is rotatably connected to the bayonet of the assembly hole through the screw-on portion; wherein, a bonding material is preset on the assembly hole, and / or the bayonet, and / or the connector, and / or the upper screw-on portion, and a sealing connection is achieved by the bonding material when the connector and the assembly hole are screwed together, or, an empty slot is arranged on the upper cover, and the power cord and the connector at least partially extend into the empty slot, and a bonding material is placed in the empty slot after the connector and the assembly hole are screwed together, and the bonding material solidifies and seals and fits on the gap between the assembly hole, the bayonet, the connector, and the screw-on portion after a certain period of time.

[0012] The assembly hole is arranged on the lower cover, and a bayonet is arranged on it; a connector is integrally formed on the power cord, and a buckle is connected through the connector, a buckle is arranged on the buckle, and the buckle is buckled on the bayonet of the assembly hole through the buckle; wherein an inner waterproof part and an outer waterproof part are respectively arranged between the connector and the buckle, and between the buckle and the bayonet, the connector and the buckle are sealed by the inner waterproof part, and the buckle and the bayonet are sealed by the outer waterproof part.

[0013] The assembly hole is arranged on the lower cover and is provided with a threaded portion; the power cord is separately provided with a threaded part and a conical waterproof part, the power cord passes through the threaded part and the conical waterproof part in sequence, and is threadedly connected with the threaded portion of the assembly hole through the threaded part; one end of the conical waterproof part acts on the assembly hole through a conical surface seal, and the other end acts on the threaded part.

[0014] The present invention improves the above structure, and the upper cover is snapped to the snap-fitting part of the lower cover by the snap-fitting part, so as to ensure the firm assembly between the upper cover and the lower cover, and effectively solves the problem that the upper cover and the lower cover are easily loosened after long-term use in the prior art where the upper cover and the lower cover are assembled only by gluing, thereby improving the stability of the upper cover and the lower cover after assembly, so as to improve the use safety and service life of the power supply; at the same time, a bonding material is pre-placed between the upper annular groove of the upper cover and the lower annular groove of the lower cover, and when the upper cover and the lower cover are snapped, the bonding material will solidify and seal on the gap between the upper cover and the lower cover after a certain period of time, thereby effectively filling all gaps formed between the upper cover and the lower cover during assembly, so as to maximize the waterproofness of the power supply; moreover, the upper annular groove and A plurality of upper convex pieces and lower convex pieces are respectively arranged on the lower annular groove. When the adhesive is solidified, it will be firmly attached to the upper convex pieces and the lower convex pieces, so as to further improve the assembly stability between the upper cover and the lower cover. Combined with a variety of different sealing methods between the power cord and the lower cover, water vapor or moisture can be completely prevented from entering the interior of the upper cover and the lower cover, which greatly improves the waterproof performance of the power supply, and correspondingly improves the safety of use and service life of the power supply, so as to effectively solve the technical problem of the difficulty in waterproofing the power supply; and, since the upper cover and the lower cover are pre-assembled by a snap-fitting method, the upper and lower covers can be moved even if the adhesive is not solidified, which effectively solves the problem of the prior art that the glue must be solidified before it can be moved, so as to improve the production efficiency and the qualified rate of finished products of the power supply.

[0015] In general, it has the characteristics of simple and reasonable structure, firm assembly, high production efficiency, long service life, good waterproof effect, low manufacturing cost, easy production, easy implementation, and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 , Figure 2 FIG. 1 is a schematic diagram of the exploded structure of the first embodiment of the present invention.

[0017] Figure 3 , Figure 4 It is a schematic diagram of the assembly structure of the first embodiment of the present invention.

[0018] Figure 5 It is a schematic structural diagram of the lower cover, power cord, and power board of the first embodiment of the present invention.

[0019] Figure 6 for Figure 4 Schematic diagram of the assembly structure cut along line AA.

[0020] Figure 7 for Figure 4 Schematic diagram of the decomposed structure cut along line AA.

[0021] Figure 8 It is a schematic diagram of the exploded structure of the lower cover and the power cord of the second embodiment of the present invention.

[0022] Fig. 9 , Fig.10 It is a schematic diagram of the assembly structure of the lower cover and the power cord according to the second embodiment of the present invention.

[0023] Fig.11 for Fig.10 Schematic diagram of the assembly structure cut along line BB.

[0024] Fig.12 for Fig.11 The X in the figure is an enlarged schematic diagram of the structure.

[0025] Fig.13 It is a schematic diagram of the exploded structure of the lower cover and the power cord of the third embodiment of the present invention.

[0026] Fig.14 , Fig.15 It is a schematic diagram of the assembly structure of the lower cover and the power cord according to the third embodiment of the present invention.

[0027] Fig.16 for Fig.15 Schematic diagram of the assembly structure cut along the CC line.

[0028] Fig.17 for Fig.16 The enlarged structural diagram at Y in FIG. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] First embodiment:

[0031] See also Figure 1-Figure 7The waterproof structure for power supply is mainly suitable for switching power supply and power adapter, which includes an upper cover 1, a lower cover 2 and a power cord 3. The upper cover 1 or the lower cover 2 is provided with an assembly hole 4, and the power cord 3 is sealed and arranged on the assembly hole 4; the upper cover 1 is provided with a buckle portion 5 and an upper annular groove 6, and the lower cover 2 is provided with a buckle fitting portion 7 and a lower annular groove 8, wherein the upper annular groove 6 and the lower annular groove 8 correspond to each other, and a bond is pre-placed between the two; the upper cover 1 is buckled with the buckle fitting portion 7 of the lower cover 2 through the buckle portion 5, and the bond is buckled with the upper and lower covers, and solidifies and seals and fits on the gap between the upper cover 1 and the lower cover 2 after a certain period of time.

[0032] like Figure 1 , Figure 2 As shown, the upper annular groove 6 is provided with a plurality of upper convex pieces 9, and the lower annular groove 8 is provided with a plurality of lower convex pieces 10; the adhesive is clamped on the upper and lower covers, and solidifies and seals on the gap between the upper annular groove 6 and the lower annular groove 8 after a certain period of time, and solidifies and adheres to the upper convex pieces 9 and the lower convex pieces 10. When the adhesive is solidified, it will be firmly attached to the upper convex pieces 9 and the lower convex pieces 10, that is, the upper convex pieces 9 and the lower convex pieces 10 will be nailed into the solidified adhesive like nails, so as to improve the assembly stability between the upper cover 1 and the lower cover 2.

[0033] The upper cover 1 is provided with an upper inner wall 11, and the buckle part 5 is a buttonhole and is provided on the upper inner wall 11; the lower cover 2 is provided with a lower inner wall 12, and the buckle fitting part 7 is a buckle platform and is provided on the lower inner wall 12; the upper inner wall 11 is buckled with the buckle fitting part 7 of the lower inner wall 12 through the buckle part 5. Since the buckle platform is buckled in the buttonhole, the upper cover 1 and the lower cover 2 cannot be easily loosened, and combined with the solidification and attachment of the upper protrusion 9, the lower protrusion 10 and the adhesive, it can ensure that the product will not be separated from each other due to falling, thereby effectively solving the problem of loosening after long-term use caused by the upper cover 1 and the lower cover 2 being assembled only by gluing in the prior art. At the same time, the two will not be separated when they fall from a high place after assembly, thereby improving the stability of the upper cover 1 and the lower cover 2 after assembly, so as to improve the use safety and service life of the product.

[0034] The upper cover 1 is also provided with an upper outer wall 13 , and the upper annular groove 6 is formed between the upper outer wall 13 and the upper inner wall 11 ; the lower cover 2 is also provided with a lower outer wall 14 , and the lower annular groove 8 is formed between the lower outer wall 14 and the lower inner wall 12 .

[0035] like Figure 6 , Figure 7, an upper positioning step 15 is provided on the upper outer wall 13, and a lower positioning step 16 is provided on the lower outer wall 14. The upper outer wall 13 and the lower outer wall 14 are in close contact with each other, and the two are positioned with each other by the cooperation of the upper positioning step 15 and the lower positioning step 16; the adhesive is clamped on the upper and lower covers, and after a certain period of time, it will solidify and seal and fit on the gap between the upper outer wall 13 and the lower outer wall 14. Since the upper outer wall 13 and the lower outer wall 14 are in close contact with each other, and at the same time, due to the solidification and sealing of the adhesive, a certain adhesion force can be formed between the upper outer wall 13 and the lower outer wall 14, thereby achieving a waterproof function. At the same time, the adhesive will also be sealed and fitted on the gap between the upper positioning step 15 and the lower positioning step 16, and multiple waterproof functions are achieved, thereby effectively filling all gaps formed between the upper cover and the lower cover during assembly to maximize the waterproofness of the power supply.

[0036] At the same time, since the upper cover 1 and the lower cover 2 are pre-assembled by snap-fitting, the upper and lower covers can be moved even if the adhesive is not solidified, which effectively solves the problem of the prior art that the upper and lower covers must wait for the glue to solidify before moving, thereby improving the production efficiency of the power supply and the qualified rate of finished products.

[0037] The upper inner wall 11 and the lower outer wall 14 are in close contact with each other, and the upper inner wall 11 extends into the bottom of the lower annular groove 8, and / or the lower outer wall 14 extends into the bottom of the upper annular groove 6; the adhesive is clamped on the upper and lower covers, and solidifies and seals on the gap between the upper inner wall 11 and the lower outer wall 14 after a certain period of time. At the same time, since the upper inner wall 11 extends into the bottom of the lower annular groove 8 and the lower outer wall 14 extends into the bottom of the upper annular groove 6, the adhesive adheres to the upper inner wall 11 and the lower outer wall 14 after solidification, and also seals on the gap between the upper inner wall 11 and the lower annular groove 8, and seals on the gap between the lower outer wall 14 and the upper annular groove 6, thereby further improving the assembly firmness of the upper cover 1 and the lower cover 2, and the waterproofness of the power supply.

[0038] A cavity is provided between the upper cover 1 and the lower cover 2, and a power supply board 17 is provided in the cavity. Figure 5 As shown, the power board 17 and the inner side of the snap-fitting part 7 rely on each other, or form a certain gap between each other. The gap is a fine or small gap, specifically less than 1 mm. When the snap-fitting part 5 and the snap-fitting part 7 are snapped into each other, the snap-fitting part 7 will not bend due to fatigue due to the support of the power board 17, ensuring that the snap-fitting part 5 and the snap-fitting part 7 will not be separated, so as to further improve the assembly firmness of the upper cover 1 and the lower cover 2; the power cord 3 is electrically connected to the power board 17.

[0039] The assembly hole 4 of this embodiment is arranged on the lower cover 2, and a bayonet 18 is arranged on it; a connector 19 is integrally formed on the power cord 3, and a screw-on portion 20 is arranged on the connector 19, and the connector 19 is rotatably connected to the bayonet 18 of the assembly hole 4 through the screw-on portion 20.

[0040] When assembling the power cord 3, a bonding material may be placed in advance on the assembly hole 4, and / or the bayonet 18, and / or the joint 19, and / or the upper screw-on portion 20. When the joint 19 is screwed into the assembly hole 4, the power cord 3 will be sealed to the lower cover 2 by the solidification effect of the bonding material, thereby sealing the gap between the assembly hole 4, the bayonet 18, the joint 19, and the screw-on portion 20, so as to achieve a sealed connection between the lower cover 2 and the power cord 3.

[0041] In addition, a vacant slot 21 may be provided on the upper cover 1, and the power cord 3 and the connector 19 at least partially extend into the vacant slot 21. A bonding material is placed in the vacant slot 21 after the connector 19 and the assembly hole 4 are screwed together. The bonding material solidifies and seals the gap between the assembly hole 4, the bayonet 18, the connector 19, and the screw-on part 20 after a certain period of time, and can also achieve a sealed connection between the lower cover 2 and the power cord 3. Thus, water vapor or moisture is completely prevented from entering the interior of the upper cover 1 and the lower cover 2, greatly improving the waterproof performance of the power supply, and correspondingly improving the safety of use and the service life of the power supply, so as to effectively solve the technical problem of the difficulty of waterproofing the power supply.

[0042] The assembly process is as follows:

[0043] 1. Weld the half of the power line 3 and the half of the power board 17.

[0044] Second, the connector 19 is aligned and inserted into the assembly hole 4 , and the screw-on portion 20 is twisted clockwise to the bottom and engaged with the bayonet 18 to ensure that the power cord 3 will not be pulled out of the assembly hole 4 .

[0045] In this process, the adhesive previously placed on the assembly hole 4, and / or the bayonet 18, and / or the joint 19, and / or the upper screw-on portion 20 can be used to make the joint 19 screw-on while sealingly fitting on the assembly hole 4, thereby achieving a sealed connection between the lower cover 2 and the power cord 3. Alternatively, the adhesive can be placed in the empty slot 21 after the joint 19 is screwed on, which can also achieve a sealed connection between the lower cover 2 and the power cord 3.

[0046] 3. A certain amount of adhesive is pre-filled into the lower annular groove 8 of the lower cover 2, and then the upper cover 1 is positioned on the lower positioning step 16 of the lower cover 2 using the upper positioning step 15. At the same time, the upper cover 1 is also snapped onto the snap-fitting portion 7 of the lower cover 2 through the snap-fitting portion 5.

[0047] Fourth, after the upper cover 1 and the lower cover 2 are positioned and snap-fitted, the adhesive will solidify and seal on all the gaps formed by the upper cover 1 and the lower cover 2 during assembly after a certain period of time, thereby effectively blocking all the gaps formed by the upper cover 1 and the lower cover 2 during assembly. Combined with the sealed connection between the power cord 3 and the lower cover 2, water vapor or moisture is completely prevented from entering the interior of the upper cover 1 and the lower cover 2, greatly improving the waterproof performance of the power supply, and correspondingly improving the safety and service life of the power supply.

[0048] After testing, the dustproof and waterproof levels of this structure reach the highest dustproof and waterproof levels of IP67 or above, thus solving the problem that the current switching power supply and power adapter cannot truly and effectively achieve the highest level of waterproofness, thereby improving the environmental applicability of the switching power supply and power adapter.

[0049] Second embodiment:

[0050] See also Figure 8-Figure 12 The waterproof structure for power supply is different from the first embodiment in that: the assembly hole 4 is arranged on the lower cover 2, and a bayonet 18 is arranged on it; a connector 19 is integrally formed on the power cord 3, and a buckle 30 is clamped through the connector 19, a buckle part 40 is arranged on the buckle 3, and the buckle 3 is buckled on the bayonet 18 of the assembly hole 4 through the buckle part 40; wherein, an inner waterproof part 41 and an outer waterproof part 22 are respectively arranged between the connector 19 and the buckle 30, and between the buckle 30 and the bayonet 18, the connector 19 and the buckle 30 are sealed by the inner waterproof part 41, and the buckle 30 and the bayonet 18 are sealed by the outer waterproof part 22.

[0051] In this embodiment, the preferred inner waterproof member 41 and outer waterproof member 22 are both O-shaped sealing rings with a certain elasticity or plasticity.

[0052] Other parts not described are the same as those in the first embodiment.

[0053] Third embodiment:

[0054] See also Figure 13-Figure 17 The waterproof structure for power supply is different from the first embodiment in that: the assembly hole 4 is arranged on the lower cover 2, and a threaded portion 23 is arranged on it; the power line 3 is separately provided with a threaded member 24 and a conical waterproof member 25, the power line 3 passes through the threaded member 24 and the conical waterproof member 25 in turn, and is threadedly connected with the threaded portion 23 of the assembly hole 4 through the threaded member 24,

[0055] When the threaded part 24 is a hemispherical nut and the thread acts on the threaded portion 23 of the assembly hole 4, the threaded part 24 will be squeezed on the conical waterproof part 25. At the same time, the conical waterproof part 25 is made of a material with a certain elasticity or plasticity, so the conical waterproof part 25 will be deformed, and one end of it will act on the assembly hole 4 through a conical surface seal, and the other end will act on the threaded part 24, thereby realizing a sealed connection between the power cord 3 and the lower cover 2.

[0056] Other parts not described are the same as those in the first embodiment.

[0057] The accompanying drawings are only for illustrative purposes and are schematic diagrams rather than actual drawings, and should not be construed as limitations on this patent. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. It is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0058] Moreover, the same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "lateral", "longitudinal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships, they are all based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent.

Claims

1. A waterproof structure for a power supply, comprising an upper cover (1), a lower cover (2) and a power cord (3), characterized in that: An assembly hole (4) is provided on the upper cover (1) or the lower cover (2), and the power cord (3) is sealingly arranged on the assembly hole (4); the upper cover (1) is provided with a buckle portion (5) and an upper annular groove (6), and the lower cover (2) is provided with a buckle fitting portion (7) and a lower annular groove (8), wherein the upper annular groove (6) and the lower annular groove (8) correspond to each other, and a bonding object is pre-placed between the two; the upper cover (1) is buckled with the buckle fitting portion (7) of the lower cover (2) through the buckle portion (5), and the bonding object is buckled with the upper and lower covers, and solidifies and seals the gap between the upper cover (1) and the lower cover (2) after a certain period of time; The upper annular groove (6) is provided with a plurality of upper convex pieces (9), and the lower annular groove (8) is provided with a plurality of lower convex pieces (10); the adhesive is clamped on the upper and lower covers, and after a certain period of time, solidifies and seals the gap between the upper annular groove (6) and the lower annular groove (8), and solidifies and adheres to the upper convex pieces (9) and the lower convex pieces (10); The upper cover (1) is provided with an upper inner wall (11), and the buckle portion (5) is provided on the upper inner wall (11); the lower cover (2) is provided with a lower inner wall (12), and the buckle fitting portion (7) is provided on the lower inner wall (12); the upper inner wall (11) is buckled with the buckle fitting portion (7) of the lower inner wall (12) via the buckle portion (5); The upper cover (1) is also provided with an upper outer wall (13), and an upper annular groove (6) is formed between the upper outer wall (13) and the upper inner wall (11); the lower cover (2) is also provided with a lower outer wall (14), and a lower annular groove (8) is formed between the lower outer wall (14) and the lower inner wall (12); An upper positioning step (15) is provided on the upper outer wall (13), and a lower positioning step (16) is provided on the lower outer wall (14); the upper outer wall (13) and the lower outer wall (14) are closely attached to each other, and the two are positioned with each other through the cooperation of the upper positioning step (15) and the lower positioning step (16); the adhesive is clamped at the upper and lower covers, and after a certain period of time, solidifies and seals on the gap between the upper outer wall (13) and the lower outer wall (14), and / or seals on the gap between the upper positioning step (15) and the lower positioning step (16); The upper inner wall (11) and the lower outer wall (14) are in close contact with each other, the upper inner wall (11) extends into the bottom of the lower annular groove (8), and / or the lower outer wall (14) extends into the bottom of the upper annular groove (6); the adhesive is clamped on the upper and lower covers, and after a certain period of time, solidifies and seals on the gap between the upper inner wall (11) and the lower outer wall (14), and / or seals on the gap between the upper inner wall (11) and the lower annular groove (8), and / or seals on the gap between the lower outer wall (14) and the upper annular groove (6); A cavity is provided between the upper cover (1) and the lower cover (2), and a power board (17) is provided in the cavity. The power board (17) and the inner side of the snap-fitting portion (7) are mutually supported, or a gap of less than 1 mm is formed between them. The power line (3) is electrically connected to the power board (17).

2. The waterproof structure for power supply according to claim 1, characterized in that: The assembly hole (4) is arranged on the lower cover (2) and is provided with a bayonet (18); a connector (19) is integrally formed on the power cord (3); a screw-on portion (20) is provided on the connector (19) and is rotatably connected to the bayonet (18) of the assembly hole (4) through the screw-on portion (20); wherein the assembly hole (4), and / or the bayonet (18), and / or the connector (19), and / or the upper screw-on portion (20) are pre-set with a bonding material, and the connector (19) is provided with a screw-on portion (20). 9) is sealed and connected with the assembly hole (4) by means of a bonding material when it is screwed on, or a vacant slot (21) is provided on the upper cover (1), the power cord (3) and the connector (19) at least partially extend into the vacant slot (21), and a bonding material is placed in the vacant slot (21) after the connector (19) is screwed on the assembly hole (4), and the bonding material solidifies after a certain period of time and is sealed and attached to the gap between the assembly hole (4), the bayonet (18), the connector (19), and the screw-on portion (20).

3. The waterproof structure for power supply according to claim 1, characterized in that: The assembly hole (4) is arranged on the lower cover (2) and is provided with a bayonet (18); a connector (19) is integrally formed on the power cord (3), and a buckle (30) is buckled with the connector (19); a buckle portion (40) is arranged on the buckle (30), and the buckle is buckled with the bayonet (18) of the assembly hole (4) through the buckle; wherein an inner waterproof component (41) and an outer waterproof component (22) are respectively arranged between the connector (19) and the buckle (30) and between the buckle (30) and the bayonet (18); the connector (19) and the buckle (30) are sealedly connected via the inner waterproof component (41), and the buckle (30) and the bayonet (18) are sealedly connected via the outer waterproof component (22).

4. The waterproof structure for power supply according to claim 1, characterized in that: The assembly hole (4) is arranged on the lower cover (2) and is provided with a threaded portion (23); the power cord (3) is provided with a threaded member (24) and a conical waterproof member (25) in separate parts; the power cord (3) passes through the threaded member (24) and the conical waterproof member (25) in sequence and is threadedly connected to the threaded portion (23) of the assembly hole (4) through the threaded member (24); one end of the conical waterproof member (25) acts on the assembly hole (4) through a conical surface seal, and the other end acts on the threaded member (24) in a sealing manner.

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