CN220605587U - Charger (charger) - Google Patents

Abstract

The embodiment of the application discloses a charger, the charger includes: the shell is provided with a containing cavity, and comprises a first side wall forming the containing cavity, wherein a charging port is formed in the first side wall; the sealing piece comprises a sealing main body and a sealing bulge, the sealing main body is embedded in the accommodating cavity, and a connecting hole is formed in the sealing main body corresponding to the charging port; the sealing protrusion is arranged on one side of the sealing main body facing the first side wall, surrounds the connecting hole and the charging port and is in sealing abutting connection with the first side wall; and the electric connecting piece is embedded in the connecting hole, and one end of the electric connecting piece is exposed out of the charging port. So set up, can solve the problem that the sealed effect in mouth department is poor that charges.

Description

Charger (charger)

Technical Field

The application relates to the technical field of charging equipment, in particular to a charger.

Background

The charger is a device for charging other electronic equipment, so that the waterproof requirement on the charger is high, and the water inlet short circuit is prevented. A sealing structure is generally arranged at the position of the charging port of the charger, and the sealing structure seals the charging port. However, the sealing structure tends to be easily loosened, resulting in deterioration of the sealing effect.

Disclosure of Invention

The main objective of this application is to propose a charger, aim at solving the poor problem of the sealed effect of mouth department that charges of charger.

To achieve the above object, a charger according to the present application includes:

the shell is provided with a containing cavity, and comprises a first side wall forming the containing cavity, wherein a charging port is formed in the first side wall;

the sealing piece comprises a sealing main body and a sealing bulge, the sealing main body is embedded in the accommodating cavity, and a connecting hole is formed in the sealing main body corresponding to the charging port; the sealing protrusion is arranged on one side of the sealing main body facing the first side wall, surrounds the connecting hole and the charging port and is in sealing abutting connection with the first side wall; the method comprises the steps of,

the electric connecting piece is embedded in the connecting hole, and one end of the electric connecting piece is exposed to the charging port.

Optionally, the sealing body includes first and second facing away from each other, the first facing toward the first sidewall;

the electric connector comprises a conductive column and a circuit board, and the circuit board is arranged on the second surface; the conductive column penetrates through the connecting hole, one end of the conductive column is exposed at the charging port, and the other end of the conductive column is connected with the circuit board;

the shell is further provided with a second side wall forming the accommodating cavity, the second side wall and the first side wall are arranged in opposite directions, the second side wall is provided with an avoidance notch, and the orthographic projection of the circuit board on the second side wall is positioned in the avoidance notch.

Optionally, the housing further has a third sidewall forming the receiving cavity, the third sidewall intersecting the second sidewall; the third side wall is provided with a first stop part, and the first stop part is abutted against one side of the circuit board, which is away from the second surface.

Optionally, the first stop portion is provided with a wire clamping notch, and the wire clamping notch is used for a wire connected with the circuit board to pass through.

Optionally, the sealing body further comprises a third surface facing and contacting the third sidewall;

the third surface is provided with a positioning groove, the third side wall is also provided with a second stop part, and the second stop part is arranged in the positioning groove and is contacted with the bottom of the positioning groove.

Optionally, the third surface is connected with the second surface, and the positioning groove is a notch arranged between the second surface and the third surface; the first stop part is connected with the second stop part.

Optionally, the sealing element further comprises a clamping protrusion, and the clamping protrusion is arranged on one side of the sealing main body, which is away from the charging port; the sealing main body is provided with a plurality of connecting holes, the electric connecting piece include connecting portion and with a plurality of electric conduction posts that connecting portion is fixed, a plurality of electric conduction posts one-to-one wears to locate a plurality of connecting holes, connecting portion are provided with the block recess, the block protruding with the cooperation of block recess.

Optionally, the sealing element includes a plurality of the engaging protrusions, the plurality of engaging protrusions are disposed around all the connecting holes, and the plurality of engaging protrusions enclose to form a limiting cavity;

the connecting portion is located in the limiting cavity, the connecting portion is provided with a plurality of clamping grooves, and the clamping protrusions and the clamping grooves are in one-to-one corresponding fit.

Optionally, one side of sealing body deviating from the mouth that charges is provided with mounting groove, the block protruding setting is in mounting groove's tank bottom, the charger is still including inlaying the magnet of establishing in the mounting groove, magnet is provided with the confession connecting portion with the hole of stepping down that the block protruding wears to establish.

Optionally, the housing includes a bottom shell and a top shell, the bottom shell forms the accommodating cavity with an opening, the top shell covers the opening of the accommodating cavity, and the first side wall is a part of a peripheral wall of the bottom shell; the region of the peripheral wall except the first side wall is provided with a limiting rib, and the limiting rib is in butt joint with the sealing main body.

Optionally, the limit rib extends along the opening direction of the opening, and one end of the limit rib, which is close to the top shell, is provided with a guide inclined plane to guide the sealing element to be inserted into the accommodating cavity from the opening.

Optionally, the sealing protrusion is tapered along its height direction and in a direction away from the sealing body; and/or the number of the groups of groups,

the sealing main body is provided with a plurality of sealing bulges.

According to the technical scheme, the sealing protrusion is abutted with the first side wall, so that stress between the sealing main body and the first side wall is small, for example, the sealing main body is just in contact with the first side wall or has a small gap or slightly abuts against the first side wall, and therefore the sealing protrusion has a large deformation space between the sealing main body and the first side wall, and sealing abutting against the first side wall is better adapted. Meanwhile, when the sealing main body is embedded in the accommodating cavity in the shell, the sealing main body is limited by the abutting of the cavity wall of the accommodating cavity, and the sealing element is prevented from moving randomly. The sealing main body is embedded into the accommodating cavity, which means that the cavity wall of the accommodating cavity has a extrusion trend to the sealing main body, so that the sealing protrusion on the sealing piece is kept in a sealing abutting state with the first side wall, the sealing protrusion forms a circle of sealing to the edge of the charging port, and water vapor is prevented from entering the shell from the contact position of the sealing protrusion and the first side wall. Therefore, in the embodiment of the application, the sealing effect is improved while the sealing element is prevented from loosening through the matching of the sealing element and the containing cavity and the arrangement of the sealing bulge on the sealing element.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a charging stand according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating an internal structure of the charging stand in FIG. 1;

FIG. 3 is a schematic view of the bottom case of FIG. 1;

FIG. 4 is a schematic view of the bottom chassis of FIG. 3 from another view;

FIG. 5 is a schematic view of the seal of FIG. 2;

FIG. 6 is a schematic cross-sectional view of the seal of FIG. 5;

FIG. 7 is a schematic view of the seal of FIG. 5 from another perspective;

FIG. 8 is a schematic cross-sectional view of the charging stand of FIG. 1;

FIG. 9 is an enlarged schematic view of FIG. 8 at A;

FIG. 10 is a schematic view of the top shell, i.e., the third sidewall, of FIG. 1;

FIG. 11 is an exploded view of a portion of the structure of the cradle of FIG. 1;

FIG. 12 is an exploded view of the seal and magnet of FIG. 11;

fig. 13 is a schematic structural view of the connection portion and the conductive post in fig. 11.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name	Reference numerals	Name of the name
						100	Charger (charger)	17	Bottom shell	23	Engaging protrusion
10	Shell body	18	Accommodating chamber	24	Spacing cavity
						11	First side wall	19	Spacing rib	25	Mounting groove
111	Charging port	20	Sealing element	30	Electric connector
						12	A second side wall	21	Sealing body	31	Conductive column
121	Avoidance gap	211	A first surface	32	Circuit board
						13	A third side wall	212	A second surface	33	Connecting part
14	Accommodating cavity	213	Third surface	331	Clamping groove
						15	First stop part	214	Connecting hole	40	Magnet
151	Wire clamping notch	215	Positioning groove	41	Yielding hole
						16	Second stop part	22	Sealing protrusion	50	Power line

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that, in the description of the present application, if the terms "first," "second," and the like are used merely for convenience in describing different components or names, they should not be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" is present throughout, it is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme where a and B meet at the same time.

The embodiment of the application provides a charger, which can be applied to an electric toothbrush to charge the electric toothbrush. Specifically, the bottom of the electric toothbrush is placed on the top shell of the charger, and the battery in the electric toothbrush is electrically connected with the electric connecting piece in the charger, so that the charger can charge the electric toothbrush.

Referring to fig. 1 to 3 and fig. 5 and 6 in combination, the charger 100 includes a housing 10, a sealing member 20 and an electrical connector 30 (as shown in fig. 11), the housing 10 is provided with a receiving cavity 14, the housing 10 includes a first side wall 11 forming the receiving cavity 14, and the first side wall 11 is provided with a charging port 111. The sealing member 20 comprises a sealing main body 21 and a sealing protrusion 22, the sealing main body 21 is embedded in the accommodating cavity 14, and the sealing main body 21 is provided with a connecting hole 214 corresponding to the charging port 111; the seal projection 22 is provided on a side of the seal body 21 facing the first side wall 11, and the seal projection 22 is provided around the connection hole 214 and the charging port 111 and in sealing abutment with the first side wall 11. The electrical connector 30 is embedded in the connection hole 214, and one end of the electrical connector 30 is exposed from the charging opening 111.

In this embodiment, the manner that the sealing protrusion 22 abuts against the first side wall 11 is adopted, so that the stress between the sealing main body 21 and the first side wall 11 is smaller, for example, the sealing main body 21 and the first side wall 11 are just in contact or have a smaller gap or slightly abut against each other, and therefore, the sealing protrusion 22 has a larger deformation space between the sealing main body 21 and the first side wall 11, so that sealing abutting against the first side wall 11 is better adapted. Meanwhile, when the seal body 21 is fitted into the housing cavity 14 in the housing 10, the seal body 21 is limited by the abutment of the cavity wall of the housing cavity 14, preventing the seal member 20 from moving at will. Since the seal body 21 is embedded in the accommodating chamber 14, meaning that the chamber wall of the accommodating chamber 14 has a tendency to press against the seal body 21, the seal protrusion 22 on the seal member 20 is kept in sealing abutment with the first side wall 11, so that the seal protrusion 22 forms a complete circle of seal against the edge of the charging port 111, preventing moisture from entering the housing 10 from the contact position of the seal protrusion 22 and the first side wall 11. Therefore, in the embodiment of the application, the sealing effect is improved while the sealing element 20 is prevented from loosening by the cooperation of the sealing element 20 and the accommodating cavity 14 and the arrangement of the sealing protrusion 22 on the sealing element 20.

Embedding in the embodiment of the application refers to: the sealing body 21 has a squeezing relationship with the receiving chamber 14, the sealing body 21 is clamped within the receiving chamber 14, and the sealing body 21 substantially fills the receiving chamber 14.

Referring to fig. 4-5 and 11 in combination, in some embodiments, the seal body 21 includes first and second facing away surfaces 211, 212, the first surface 211 facing the first sidewall 11. Optionally, the shape of the first surface 211 is substantially the same as the shape of the first sidewall 11, for example, the first surface 211 and the first sidewall 11 are both cambered surfaces.

The electrical connector 30 includes a conductive post 31 and a circuit board 32, and the circuit board 32 is disposed on the second surface 212; the conductive post 31 is disposed through the connection hole 214, one end of the conductive post 31 is exposed at the charging port 111 to be connected with the power line 50, the other end of the conductive post 31 is connected with the circuit board 32, and the circuit board 32 is connected with a wire. Optionally, the circuit board 32 is disposed in a fitting manner with the second surface 212, so as to make the structure compact.

Referring again to fig. 3, in some embodiments, the housing 10 further has a second sidewall 12 forming the receiving cavity 14, and the second sidewall 12 is disposed opposite to the first sidewall 11, so that the second surface 212 faces the second sidewall 12. Further, the second side wall 12 is provided with an avoidance notch 121, and an orthographic projection of the circuit board 32 on the second side wall 12 is located in the avoidance notch 121. When the sealing member 20 and the circuit board 32 are pushed into the housing chamber 14 together, the sealing member 20 is pressed by the first side wall 11 and the second side wall 12 to seal the charging port 111. The provision of the avoidance gap 121 provides a certain space for restoring deformation for the sealing member 20, so that the circuit board 32 can partially extend into the avoidance gap 121, and the circuit board 32 is prevented from being damaged due to extrusion of the second side wall 12.

Referring to fig. 8 to 10 in combination, the housing 10 further has a third sidewall 13 forming a receiving cavity 14, and the third sidewall 13 intersects the first sidewall 11. Alternatively, the avoidance gap 121 penetrates through the second side wall 12 along the thickness direction of the second side wall 12, and the avoidance gap 121 is further opened facing the third side wall 13 to form a gap shape. When the sealing member 20 and the wiring board 32 are pushed into the housing chamber 14 from above, the wiring board 32 can be completely prevented from contacting the second side wall 12.

In some embodiments, the third side wall 13 is provided with the first stop portion 15, and the first stop portion 15 abuts against one side of the circuit board 32, which is away from the second surface 212, so that the first stop portion 15 has a pressing force towards the second surface 212 on the circuit board 32, which not only can prevent the circuit board 32 from moving into the avoidance gap 121 to fall off, but also can ensure the connection stability of the circuit board 32 and the conductive column 31, and meanwhile, the sealing protrusion 22 on the first surface 211 has a tendency of pressing towards the first side wall 11, so that the sealing effect is improved. Furthermore, due to the arrangement of the avoidance notch 121, the contact area between the second side wall 12 and the second surface 212 is reduced, and the arrangement of the first stop portion 15 can strengthen the contact of the second surface 212 and make up for the defect of the second side wall 12.

The first sidewall 11 may be perpendicular to the third sidewall 13, or the first sidewall 11 may be at an angle of less than or greater than 90 ° to the third sidewall 13.

In some embodiments, the first stop portion 15 is provided with a wire clamping notch 151, and the wire clamping notch 151 is used for passing a wire connected with the electrical connector 30. The wires are limited in the wire clamping notch 151, so that the wires can be prevented from moving randomly to influence the connection stability, and meanwhile, the wires can be prevented from being distributed in disorder. The wire can be completely clamped by the wire clamping notch 151, or the wire has a certain activity allowance in the wire clamping notch 151. Further, the charger 100 further includes a power cord 50, one end of the power cord 50 is connected to a power source, the other end of the power cord 50 is inserted into the charging port 111 and is connected to the electric connector 30, the electric connector 30 is further connected to a wire, and the other end of the wire is connected to the electric toothbrush, so that the power source can charge the toothbrush body. In this embodiment, the wires are directly connected to the circuit board of the electrical connector 30.

When the circuit board 32 is disposed on the second surface 212 and the first stop portion 15 abuts against the circuit board 32, the wires led out from the circuit board 32 are close to the first stop portion 15, so that the wire clamping notch 151 on the first stop portion 15 can be directly penetrated, and wire winding is reduced.

Referring again to fig. 7 to 10 in combination, further, the sealing body 21 further includes a third surface 213, the third surface 213 facing and contacting the third sidewall 13; the third surface 213 is provided with a positioning groove 215, the third side wall 13 is further provided with a second stop portion 16, and the second stop portion 16 is disposed in the positioning groove 215 and contacts with the bottom of the positioning groove 215. In this embodiment, any one of the third side wall 13 and the second stopper 16 may contact the sealing body 21 and contact positions of different heights of the sealing body 21, thereby achieving the effect of double contact assurance to restrict the movement of the sealing body 21 toward the third side wall 13. Meanwhile, the positioning groove 215 is matched with the second stop part 16, so that the second stop part 16 reasonably utilizes space, and the structure is more compact. Furthermore, the positioning groove 215 also has a positioning effect on the cooperation of the top case, the sealing member 20 and the bottom case 17.

In some embodiments, third surface 213 is coupled to second surface 212 and detent 215 is a notch disposed between second surface 212 and third surface 213. The first stop 15 and the second stop 16 are connected and have a structural reinforcement effect with respect to each other. Optionally, the first stop 15 and the second stop 16 are each provided in the form of a stiffener. The first stop 15 has an inverted U-shape and the second stop 16 is connected to the first stop 15 at a transverse rib in the middle. In other embodiments, the first stop portion 15 and the second stop portion 16 may also have a plate shape.

In some embodiments, the housing 10 includes a bottom shell 17 and a top shell, the bottom shell 17 forming a receiving cavity 14 having an opening, the top shell closing the opening of the receiving cavity 14, the first side wall 11 and the second side wall 12 being part of a peripheral wall of the bottom shell 17, the peripheral wall referring to an annular wall disposed around the opening, the third side wall 13 forming part of the top shell. Optionally, the bottom shell 17 and the top shell are provided separately.

Optionally, two cavities that are respectively opened upwards are formed in the bottom shell 17, wherein one cavity is a containing cavity 14, the other cavity is a containing cavity 18, and the containing cavity 18 is used for containing other structures such as a balancing weight. The second side wall 12 is a common cavity wall between the two cavities.

When the sealing member 20 and the electrical connector 30 are mounted to the housing cavity 14, the top cover is closed to the top surface of the bottom cover 17, the first stopping portion 15 on the top cover abuts against the second surface 212 of the sealing member 20, and the second stopping portion 16 abuts against the positioning groove 215 of the sealing member 20.

Referring to fig. 4 again, further, the area of the peripheral wall except the first side wall 11 is provided with a limit rib 19, and the limit rib 19 abuts against the seal body 21, so that the contact area between the seal body 21 and the peripheral wall becomes smaller, and the difficulty in assembling the seal body 21 embedded into the accommodating cavity 14 can be reduced. In addition, since the whole contact area becomes smaller, the single limiting rib 19 can be provided with a larger protruding height to increase the extrusion force to the sealing main body 21, so that the sealing main body 21 forms a larger extrusion force to the first side wall 11, and the sealing performance is improved. Since the stopper rib 19 is not provided on the first side wall 11, the degree of fitting of the sealing protrusion 22 and the first side wall 11 can be ensured. Specifically, the peripheral wall and along circumference have set gradually many spacing muscle 19, and many spacing muscle 19 distribute at different lateral walls.

Optionally, the limiting rib 19 extends along the opening direction of the opening, and one end of the limiting rib 19, which is close to the top shell, is provided with a guiding inclined plane (not labeled in the figure) to guide the sealing element 20 to be inserted into the accommodating cavity 14 from the opening, so that the protruding height of the corresponding guiding inclined plane of the limiting rib 19 gradually decreases along the opening direction of the opening.

Referring to fig. 7, 12 and 13 in combination, the sealing member 20 further includes a locking protrusion 23, the sealing body 21 is provided with a plurality of connection holes 214, the electrical connector 30 includes a connection portion 33 and a plurality of conductive columns 31 fixed to the connection portion 33, the plurality of conductive columns 31 penetrate the plurality of connection holes 214 in a one-to-one correspondence manner and are in sealing engagement with the sealing member 20, the connection portion 33 is provided with a locking groove 331, and the locking protrusion 23 is in one-to-one engagement with the locking groove 331. In the present embodiment, the connection portion 33 is provided to connect the plurality of conductive posts 31 to form a single body. The connection portion 33 may be a plastic member and is integrally injection molded with the conductive post 31. The size of the connection portion 33 is larger than that of the connection hole 214, so that the connection portion 33 also plays a limiting role, and the conductive post 31 is prevented from moving out of the charging port 111. The engagement protrusion 23 and the engagement groove 331 cooperate to mean: the engaging protrusion 23 is embedded into the engaging groove 331 to form a mutually engaged structure, so that the fixing and sealing effects are better.

Optionally, the sealing member 20 includes a plurality of engaging protrusions 23, the engaging protrusions 23 are disposed on a side of the sealing body 21 facing away from the charging opening 111, the plurality of engaging protrusions 23 are disposed around all the connecting holes 214, and the plurality of engaging protrusions 23 enclose to form a limiting cavity 24. The plurality of conductive posts 31 are correspondingly penetrated in the plurality of connecting holes 214 and are in sealing fit with the sealing element 20, the connecting part 33 is positioned in the limiting cavity 24, the connecting part 33 is provided with a plurality of clamping grooves 331, and the plurality of clamping protrusions 23 are correspondingly matched with the plurality of clamping grooves 331. When the circle of clamping bulges 23 are arranged, a circle of meshing structure can be formed, and a good limiting effect is achieved in all directions. In addition, after the circle of clamping bulges 23 is arranged, a limit cavity 24 for accommodating the connecting part 33 can be formed, so that the space is reasonably utilized.

In some embodiments, the conductive post 31 and the connection portion 33 may be integrally injection molded with the seal 20 as an insert.

Further, a side (second surface 212) of the sealing body 21 facing away from the charging port 111 is provided with a mounting groove 25, the engaging protrusion 23 is disposed at a bottom of the mounting groove 25, the charger 100 further includes a magnet 40 embedded in the mounting groove 25, the magnet 40 is provided with a yielding hole 41 through which the connecting portion 33 and the engaging protrusion 23 penetrate, and the yielding hole corresponds to the magnet 40 being sleeved outside the connecting portion 33. The magnet 40 is also set on the head of the power line 50, when the head of the power line 50 is close to the charging port 111, the two magnets 40 directly adsorb the power line 50 to the charging port 111 after interaction, so that user experience is improved. In addition, by providing the mounting groove 25 to accommodate the magnet 40, the structure is more compact.

Alternatively, the magnet 40 is fully received within the mounting recess 25 so that the wiring board 32 may be in contact with the second surface 212.

When the sealing body 21 is provided with the plurality of connection holes 214, all orthographic projections of the connection holes 214 on the first side wall 11 fall entirely within the charging port 111.

Referring again to fig. 6, in some embodiments, the sealing protrusion 22 tapers in its height direction and in a direction away from the sealing body 21, for example, the sealing protrusion 22 has a triangular or trapezoidal cross-section. So set up, sealing protrusion 22 is more yielding when receiving the extrusion, guarantees sealing protrusion 22 can paste closely first lateral wall 11 all the time.

In some embodiments, a plurality of sealing protrusions 22 are provided on the sealing body 21. For example, two or three sealing protrusions 22 are provided on the sealing body 21, and each sealing protrusion 22 forms a seal, and a plurality of seals can ensure the sealing effect.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (12)

1. A charger, comprising:

the shell is provided with a containing cavity, and comprises a first side wall forming the containing cavity, wherein a charging port is formed in the first side wall;

the sealing piece comprises a sealing main body and a sealing bulge, the sealing main body is embedded in the accommodating cavity, and a connecting hole is formed in the sealing main body corresponding to the charging port; the sealing protrusion is arranged on one side of the sealing main body facing the first side wall, surrounds the connecting hole and the charging port and is in sealing abutting connection with the first side wall; the method comprises the steps of,

the electric connecting piece is embedded in the connecting hole, and one end of the electric connecting piece is exposed to the charging port.

2. The charger of claim 1 wherein said sealing body includes first and second facing away surfaces, said first surface facing said first sidewall;

the electric connector comprises a conductive column and a circuit board, and the circuit board is arranged on the second surface; the conductive column penetrates through the connecting hole, one end of the conductive column is exposed at the charging port, and the other end of the conductive column is connected with the circuit board;

the shell is further provided with a second side wall forming the accommodating cavity, the second side wall and the first side wall are arranged in opposite directions, the second side wall is provided with an avoidance notch, and the orthographic projection of the circuit board on the second side wall is positioned in the avoidance notch.

3. The charger of claim 2 wherein said housing further has a third side wall forming said receiving cavity, said third side wall intersecting said second side wall; the third side wall is provided with a first stop part, and the first stop part is abutted against one side of the circuit board, which is away from the second surface.

4. The charger of claim 3 wherein said first stop portion is provided with a wire-clamping notch for a wire connected to said circuit board to pass through.

5. The charger of claim 3 wherein said sealing body further comprises a third surface, said third surface facing and contacting said third sidewall;

the third surface is provided with a positioning groove, the third side wall is also provided with a second stop part, and the second stop part is arranged in the positioning groove and is contacted with the bottom of the positioning groove.

6. The charger of claim 5 wherein said third surface is connected to said second surface and said detent is a notch disposed between said second surface and said third surface; the first stop part is connected with the second stop part.

7. The charger of claim 1 wherein said seal further comprises a snap-fit protrusion disposed on a side of said seal body facing away from said charging port; the sealing main body is provided with a plurality of connecting holes, the electric connecting piece include connecting portion and with a plurality of electric conduction posts that connecting portion is fixed, a plurality of electric conduction posts one-to-one wears to locate a plurality of connecting holes, connecting portion are provided with the block recess, the block protruding with the cooperation of block recess.

8. The charger of claim 7 wherein said seal comprises a plurality of said snap-fit protrusions disposed around all of said connecting apertures, said snap-fit protrusions defining a spacing cavity;

the connecting portion is located in the limiting cavity, the connecting portion is provided with a plurality of clamping grooves, and the clamping protrusions and the clamping grooves are in one-to-one corresponding fit.

9. The charger of claim 8 wherein a mounting groove is provided on a side of the sealing body facing away from the charging port, the engaging protrusion is provided at a bottom of the mounting groove, the charger further comprises a magnet embedded in the mounting groove, and the magnet is provided with a relief hole through which the connecting portion and the engaging protrusion pass.

10. The charger of any one of claims 1 to 9 wherein said housing comprises a bottom shell and a top shell, said bottom shell forming said receiving cavity with an opening, said top shell closing said receiving cavity opening, said first side wall being a portion of a peripheral wall of said bottom shell; the region of the peripheral wall except the first side wall is provided with a limiting rib, and the limiting rib is in butt joint with the sealing main body.

11. The charger of claim 10 wherein said stop rib extends in the direction of the opening of said opening, an end of said stop rib adjacent said top housing having a guide ramp for guiding insertion of said seal into said receiving cavity from said opening.

12. The charger of claim 1 wherein said sealing projection tapers in its height direction and in a direction away from said sealing body; and/or the number of the groups of groups,

the sealing main body is provided with a plurality of sealing bulges.