CN115022768A

CN115022768A - Earphone charging box connecting device and earphone charging box

Info

Publication number: CN115022768A
Application number: CN202210930752.2A
Authority: CN
Inventors: 张华�; 王文亮; 程黎辉; 关亚东
Original assignee: Longcheer Electronics Huizhou Co Ltd
Current assignee: Longcheer Electronics Huizhou Co Ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2022-09-06
Anticipated expiration: 2042-08-04
Also published as: CN115022768B

Abstract

The invention discloses an earphone charging box connecting device and an earphone charging box, wherein the earphone charging box connecting device comprises a first shell, a second shell and a third shell; the third housing is disposed between the first housing and the second housing; two ends of the third shell are respectively provided with a rotating shaft slot; one end of the first shell and one end of the second shell are respectively provided with a rotating shaft; the rotating shaft is inserted into the rotating shaft slot; the outer wall of the rotating shaft is provided with a limiting groove extending along the circumferential direction of the rotating shaft; the inner wall of the rotating shaft slot is provided with a limiting block, and the limiting block is movably clamped in the limiting groove. The invention has larger opening angle, can automatically spring open by single-hand operation, can also be kept at any opening and closing angle, can be convenient for user operation, and has better use experience.

Description

Earphone charging box connecting device and earphone charging box

Technical Field

The invention relates to the field of True Wireless Stereo (TWS) earphones, in particular to an earphone charging box connecting device and an earphone charging box.

Background

With the continuous improvement of the living standard of people, the wireless earphone has been widely used in daily office and entertainment scenes of people, and becomes one of electronic devices generally consumed by people. True Wireless Stereo (TWS) headsets have become the mainstream products in the market, and are popular with consumers due to their convenience of use. A True Wireless Stereo (TWS) headset needs to be provided with a headset charging box for accommodating and charging the headset so as to charge the headset while being conveniently carried without using the headset.

The earphone charging box in the prior art comprises a box body and a cover body, wherein a shaft hole and a rotating shaft are respectively arranged on the box body and the cover body, and the rotating shaft rotates in the shaft hole to realize the hinging between the box body and the cover body, so that the cover body can be operated to be opened and closed. However, in the charging box for the earphone in the prior art, the maximum opening angle of the cover body is usually controlled by means of magnetic action, so that on one hand, the stability of limiting is poor, and the situation that the limiting fails frequently occurs when external force is applied; on the other hand, when the earphone charging box with different maximum flip angles needs to be designed and produced, magnetic parts with different magnetic forces need to be purchased, and the universality of research and development and production is poor.

Disclosure of Invention

The invention aims to provide an earphone charging box connecting device and an earphone charging box.

The invention provides a connecting device of an earphone charging box, which comprises a first shell, a second shell and a third shell; the third housing is disposed between the first housing and the second housing; two ends of the third shell are respectively provided with a rotating shaft slot; one end of the first shell and one end of the second shell are respectively provided with a rotating shaft; the rotating shaft is inserted into the rotating shaft slot; the outer wall of the rotating shaft is provided with a limiting groove extending along the circumferential direction of the rotating shaft; the inner wall of the rotating shaft slot is provided with a limiting block, and the limiting block is movably clamped in the limiting groove.

The included angle between the two ends of the limiting groove is 130 degrees. The first shell, the second shell, the third shell and the rotating shaft are all of hollow structures, so that a cavity penetrating through the first shell, the second shell and the third shell is formed inside the first shell, the second shell and the third shell after the first shell, the second shell and the third shell are assembled. The connecting device of the earphone charging box provided by the invention also comprises a spring, wherein two ends of the spring are respectively fixed with the two rotating shafts; the middle part of the spring is fixed with the third shell. The spring is a double-torsion spring comprising a first spring body and a second spring body; a first torsion arm is arranged between the first spring body and the second spring body; the outer ends of the first spring body and the second spring body are respectively provided with a second torsion arm; a first torsion arm clamping groove is formed in the inner wall of the third shell; and the inner wall of the rotating shaft is provided with a second torque arm clamping groove. The connecting device of the earphone charging box provided by the invention is also provided with a tubular spring supporting shaft; the middle part of the tubular spring supporting shaft is arranged in the first spring body and the second spring body in a penetrating way; the two ends of the tubular spring support shaft are arranged in the two rotating shafts in a penetrating mode. The connecting device for the earphone charging box further comprises two silica gel rings, wherein an annular groove is formed in the inner end of the rotating shaft, and the silica gel rings are sleeved in the annular groove.

The invention provides an earphone charging box, which comprises a lower box body, an upper box body and a connecting device, wherein the lower box body is provided with a first connecting hole; the connecting device is the earphone charging box connecting device; the first shell and the second shell are fixed with the upper box body; the third shell is fixed with the lower box body. The top of the lower box body and the end of the upper box body are respectively provided with a first mounting groove and a second mounting groove; the first mounting groove and the second mounting groove form a mounting groove matched with the outer periphery of the connecting device in shape. The bottom of the third shell is provided with a third connecting part; a third assembling groove matched with the third connecting part in shape is arranged in the first installing groove; the third connecting portion is inserted into the third fitting groove. The side parts of the first shell and the second shell are respectively provided with a first connecting part and a second connecting part; a first mounting groove matched with the first connecting part in shape and a second mounting groove matched with the second connecting part in shape are arranged in the second mounting groove; the first connecting part is inserted into the first assembling groove; the second connecting portion is inserted into the second fitting groove. The interiors of the first connecting part, the second connecting part and the third connecting part are hollow structures; the top parts of the first connecting part, the second connecting part and the third connecting part are provided with first wiring holes; and the top parts of the first assembling groove, the second assembling groove and the third assembling groove are respectively provided with a second wiring hole communicated with the first wiring hole. And a tubular wiring column can be arranged outside the first wiring hole or the second wiring hole.

The earphone charging box connecting device provided by the invention has a hollow structure inside, so that a cable can conveniently pass through the connecting device; the limiting groove and the limiting block for controlling the opening and closing angle are arranged in the shell of the connecting device, so that the appearance is simpler, and the structure is more stable. The earphone charging box provided by the invention has a larger opening angle, can be automatically bounced open by single-hand operation, can also be kept at any opening and closing angle, can be conveniently operated by a user, and has better use experience.

Drawings

Fig. 1 is a schematic view illustrating an assembly of a charging box connecting device of an earphone according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first housing in the earphone charging box connecting device according to the first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a third housing in the earphone charging box connecting device according to the first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a spring in the earphone charging box connecting device according to the first embodiment of the present invention;

fig. 5 is a schematic structural diagram of a tubular spring supporting shaft in the earphone charging box connecting device according to the first embodiment of the present invention;

fig. 6 is a schematic external structural view of the earphone charging box connecting device according to the first or second embodiment of the present invention after being assembled;

fig. 7 is a schematic view showing an assembled position of the connecting means in the charging box of the earphone according to the third embodiment of the present invention;

fig. 8 is a schematic view illustrating an assembly of the connecting device and the upper and lower cases in the charging case of the earphone according to the third embodiment of the present invention;

fig. 9 is a schematic view illustrating the assembly of the connection device and the second mounting groove in the charging box of the earphone according to the third embodiment of the present invention;

fig. 10 is a schematic diagram of the wiring of the earphone charging box connecting device according to the first or second embodiment of the present invention;

fig. 11 is a schematic structural view of a first housing in the earphone charging box connecting device according to the second embodiment of the present invention;

fig. 12 is an assembly diagram of the earphone charging box connecting device according to the second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

As shown in fig. 1 to 6, the present embodiment provides an earphone charging box connecting device, which includes a first housing 1, a second housing 2, and a third housing 3; the third housing 3 is disposed between the first housing 1 and the second housing 2; two ends of the third shell 3 are respectively provided with a rotating shaft slot 5; one end of the first shell 1 and one end of the second shell 2 are respectively provided with a rotating shaft 4; the rotating shaft 4 is inserted into the rotating shaft slot 5; a limiting groove 6 extending along the circumferential direction of the rotating shaft 4 is formed in the outer wall of the rotating shaft; the inner wall of the rotating shaft slot 5 is provided with a limiting block 7, and the limiting block 7 is movably clamped in the limiting groove 6. As will be understood by those skilled in the art, the first housing 1 and the second housing 2 are both connected to the third housing 3 through a rotating shaft 4, so that the first housing 1 and the third housing 3 can rotate relative to each other, and the third housing 3 and the second housing 2 can rotate relative to each other; when the first casing 1 and the second casing 2 are fixed to the upper box 16 and the third casing 3 is fixed to the lower box 15, the upper box 16 is hinged to the lower box 15, so that the upper box 16 is opened or closed. On the contrary, if the first casing 1 and the second casing 2 are fixed to the lower box 15 at the same time, and the third casing 3 is fixed to the upper box 16, the upper box 16 and the lower box 15 can be hinged to each other, so as to open or close the upper box 16. The limiting blocks 7 are movably clamped in the limiting grooves 6, when the rotating shaft 4 rotates in the rotating shaft slot 5, the limiting blocks 7 slide in the limiting grooves 6 along the circumferential direction of the rotating shaft 4, and when the limiting blocks 7 reach two end portions of the limiting grooves 6, the limiting blocks are in a state that the upper box body 16 and the lower box body 15 are closed and a state that the upper box body 16 and the lower box body 15 are in the maximum opening angle respectively.

The included angle between the two ends of the limiting groove 6 is 130 degrees. As will be understood by those skilled in the art, when the rotation shaft 4 rotates in the rotation shaft slot 5, the maximum stroke of the limiting block 7 in the limiting groove 6 is 130 degrees, so that when the earphone charging box connecting device provided by the present embodiment is fixed to the lower box body 15 and the upper box body 16 of the earphone box, respectively, the maximum opening angle of the lower box body 15 and the upper box body 16 is 130 degrees. Technical personnel in the field can understand, the general biggest opening angle of earphone box on the market at present is 110 degrees, adopts the earphone box connecting device that charges that this embodiment provided, enlarges the biggest opening angle of earphone box to 130 degrees, and this is accomodate the design and is provided more design spaces just for the inside of earphone box, and it is all more convenient that the consumer takes earphone, later stage to the inside maintenance etc. that maintains of earphone box.

The first shell 1, the second shell 2, the third shell 3 and the rotating shaft 4 are all of hollow structures, so that a cavity penetrating through the first shell 1, the second shell 2 and the third shell 3 is formed inside the first shell 1, the second shell 2 and the third shell 3 after the first shell 1, the second shell 2 and the third shell 3 are assembled. Those skilled in the art can understand that a cable connection is required between the lower box body 15 and the upper box body 16 of the earphone charging box, so that a power supply and an electric signal arranged in the lower box body 15 are transmitted to an active device arranged in the upper box body 16 through the cable, and a through cavity is formed inside the connecting device of the earphone charging box, so that on one hand, a channel is provided for cable routing, and meanwhile, the simplicity and the attractiveness of the external structure of the earphone charging box are maintained.

The connecting device for the earphone charging box provided by the embodiment further comprises a spring, wherein two ends of the spring are respectively fixed with the two rotating shafts 4; the middle part of the spring is fixed with the third shell 3. As will be understood by those skilled in the art, when the hinge 4 is rotated in the hinge slot 5, the middle portion of the spring moves with the third housing 3; both ends of the spring move along with the first housing 1 and the second housing 2, so that the spring is deformed to generate elastic force. As can be understood by those skilled in the art, the limiting block 7 and the limiting groove 6 are arranged at one end of the limiting groove 6, when the spring deforms, the limiting block 7 is located at one end of the limiting groove 6, and at this time, the lower box body 15 and the upper box body 16 are mutually closed and fixed with the first shell 1, the second shell 2 and the third shell 3 respectively; thus, the spring will generate the elastic force to rotate the stopper 7 to the other end of the stopper groove 6, and urge the upper case 16 and the lower case 15 to open at an angle of 130 degrees. It will be understood by those skilled in the art that a buckle structure or a magnetic attraction structure may be disposed at the edges of the lower case 15 and the upper case 16 to overcome the elastic force of the spring, when the buckle is engaged, the upper case 16 is controlled to be in a closed state with the lower case 15, and when the user releases the buckle or the magnetic attraction, the upper case 16 will automatically spring open to a state of 130 degrees under the elastic force. This provides great convenience to a user operating with one hand.

The spring is a double-torsion spring comprising a first spring body 8 and a second spring body 9; a first torsion arm 10 is arranged between the first spring body 8 and the second spring body 9; the outer ends of the first spring body 8 and the second spring body 9 are respectively provided with a second torsion arm 11; a first torsion arm clamping groove is formed in the inner wall of the third shell 3; and a second torque arm clamping groove is formed in the inner wall of the rotating shaft 4. As will be understood by those skilled in the art, when the first housing 1, the second housing 2 and the third housing 3 are assembled, the middle of the spring is fixed to the third housing 3 by clamping the first torsion arm 10 in the first torsion arm clamping groove; the two ends of the spring are respectively fixed with the first shell 1 and the second shell 2 by respectively clamping the two second torque arms 11 in the two second torque arm clamping grooves.

The connecting device for the charging box of the earphone provided by the embodiment is also provided with a tubular spring supporting shaft 12; the middle part of the tubular spring supporting shaft 12 is arranged in the first spring body 8 and the second spring body 9 in a penetrating way; the two ends of the tubular spring support shaft 12 are inserted into the two rotating shafts 4. As will be understood by those skilled in the art, the middle of the tubular spring support shaft 12 is inserted into the first spring body 8 and the second spring body 9, so that the tubular spring support shaft 12 supports the spring, and the spring is stably arranged inside the third housing 3; the two end portions of the tubular spring support shaft 12 are respectively inserted into the two rotating shafts 4, so that the rotating shafts 4 can be fixed more stably. Those skilled in the art will appreciate that the tubular spring support shaft 12 is a hollow structure that does not interfere with routing within the cavity.

Example two

As shown in fig. 11 or 12, the present embodiment provides an earphone charging box connecting device, including a first housing 1, a second housing 2, and a third housing 3; the third housing 3 is disposed between the first housing 1 and the second housing 2; two ends of the third shell 3 are respectively provided with a rotating shaft slot 5; one end of the first shell 1 and one end of the second shell 2 are respectively provided with a rotating shaft 4; the rotating shaft 4 is inserted into the rotating shaft slot 5; a limiting groove 6 extending along the circumferential direction of the rotating shaft 4 is formed in the outer wall of the rotating shaft; the inner wall of the rotating shaft slot 5 is provided with a limiting block 7, and the limiting block 7 is movably clamped in the limiting groove 6. As will be understood by those skilled in the art, the first housing 1 and the second housing 2 are both connected to the third housing 3 through a rotating shaft 4, so that the first housing 1 and the third housing 3 can rotate relative to each other, and the third housing 3 and the second housing 2 can rotate relative to each other; when the first casing 1 and the second casing 2 are fixed to the upper box 16 and the third casing 3 is fixed to the lower box 15, the upper box 16 is hinged to the lower box 15, so that the upper box 16 is opened or closed. On the contrary, if the first casing 1 and the second casing 2 are fixed to the lower box 15 at the same time, and the third casing 3 is fixed to the upper box 16, the upper box 16 and the lower box 15 can be hinged to each other, so as to open or close the upper box 16. The limiting blocks 7 are movably clamped in the limiting grooves 6, when the rotating shaft 4 rotates in the rotating shaft slot 5, the limiting blocks 7 slide in the limiting grooves 6 along the circumferential direction of the rotating shaft 4, and when the limiting blocks 7 reach two end portions of the limiting grooves 6, the limiting blocks are in a state that the upper box body 16 and the lower box body 15 are closed and a state that the upper box body 16 and the lower box body 15 are in the maximum opening angle respectively.

The included angle between the two ends of the limiting groove 6 is 130 degrees. It can be understood by those skilled in the art that when the rotating shaft 4 rotates in the rotating shaft slot 5, the maximum stroke of the limiting block 7 in the limiting groove 6 is 130 degrees, so that when the earphone charging box connecting device provided by the present embodiment is fixed to the lower box body 15 and the upper box body 16 of the earphone box, respectively, the maximum opening angle of the lower box body 15 and the upper box body 16 is 130 degrees. Technical personnel in the field can understand, the general biggest opening angle of earphone box on the market at present is 110 degrees, adopts the earphone box connecting device that charges that this embodiment provided, enlarges the biggest opening angle of earphone box to 130 degrees, and this is accomodate the design and is provided more design spaces just for the inside of earphone box, and it is all more convenient that the consumer takes earphone, later stage to the inside maintenance etc. that maintains of earphone box.

The first shell 1, the second shell 2, the third shell 3 and the rotating shaft 4 are all of hollow structures, so that a cavity penetrating through the first shell 1, the second shell 2 and the third shell 3 is formed inside the first shell 1, the second shell 2 and the third shell 3 after the first shell 1, the second shell 2 and the third shell 3 are assembled. As can be understood by those skilled in the art, a cable connection is required between the lower case body 15 and the upper case body 16 of the earphone charging box, so that a power supply and an electrical signal set in the lower case body 15 are transmitted to an active device set in the upper case body 16 through the cable, and a through cavity is formed inside the earphone charging box connecting device, thereby providing a channel for cable routing on one hand, and simultaneously keeping the external structure of the earphone charging box simple and beautiful.

The earphone charging box connecting device provided by the embodiment further comprises two silica gel rings 13, an annular groove 14 is formed in the inner end of the rotating shaft 4, and the silica gel rings 13 are sleeved in the annular groove 14. Those skilled in the art can understand that after the assembly is completed, the silicone ring 13 is clamped between the inner wall of the rotating shaft slot 5 and the outer wall of the rotating shaft 4, so that a large friction force is provided between the rotating shaft 4 and the rotating shaft slot 5, and thus when the upper box body 16 is turned over at a certain angle, the friction force of the silicone ring 13 can be kept at the turned-over angle, so that a user can conveniently keep the earphone charging box at a proper angle according to the use requirement.

EXAMPLE III

As shown in fig. 7 to 10, the present embodiment provides an earphone charging box, which includes a lower box body 15, an upper box body 16 and a connecting device; the connecting device is the earphone charging box connecting device according to the first embodiment or the second embodiment; the first shell 1 and the second shell 2 are fixed with the upper box 16; the third casing 3 is fixed to the lower case 15. Those skilled in the art will understand that the lower case 15 and the upper case 16 can be closed and automatically ejected by the mutual rotation among the first casing 1, the second casing 2 and the third casing 3.

The top of the lower box body 15 and the end of the upper box body 16 are respectively provided with a first mounting groove 17 and a second mounting groove 18; the first mounting groove 17 and the second mounting groove 18 form a fitting groove matching the shape of the outer circumference of the connecting device. As will be appreciated by those skilled in the art, by disposing the connecting device in the mounting slot, the appearance of the lower case 15, the upper case 16 and the connecting device is kept integral, which is more beautiful and more stable.

The bottom of the third shell 3 is provided with a third connecting part 19; a third assembly groove 20 matched with the third connecting part 19 in shape is arranged in the first mounting groove 17; the third connecting portion 19 is inserted into the third fitting groove 20. It will be appreciated by those skilled in the art that the third housing 3 is detachably mounted on the top of the lower case 15.

The side parts of the first shell 1 and the second shell 2 are respectively provided with a first connecting part 21 and a second connecting part 22; a first assembly groove 23 matched with the shape of the first connecting part 21 and a second assembly groove 24 matched with the shape of the second connecting part 22 are formed in the second mounting groove 18; the first connection portion 21 is inserted into the first fitting groove 23; the second connecting portion 22 is inserted into the second fitting groove 24. As will be understood by those skilled in the art, the first and

second housings

1 and 2 are detachably mounted to the side of the upper case 16.

The interiors of the first connecting part 21, the second connecting part 22 and the third connecting part 19 are hollow structures; the tops of the first connecting part 21, the second connecting part 22 and the third connecting part 19 are all provided with a first wiring hole 25; the top parts of the first assembling groove 23, the second assembling groove 24 and the third assembling groove 20 are all provided with a second wiring hole 26 communicated with the first wiring hole 25. Those skilled in the art will appreciate that the first wire hole 25, the second wire hole 26 and the cavity may form a passage through the upper case 16 and the lower case 15, and the passage may be used for cabling to realize the circuit connection between the electronic components in the upper case 16 and the lower case 15.

The first wiring hole 25 or the second wiring hole 26 may be further provided with a tubular wiring post 27 on the outside. As will be understood by those skilled in the art, the tubular wiring post 27 disposed outside the first wiring hole 25 can penetrate into the second wiring hole 26 matching with the tubular wiring post to form a wiring channel; similarly, the tubular wiring column 27 arranged outside the second wiring hole 26 can penetrate into the first wiring hole 25 to form a wiring channel; this can better guide the cable.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The earphone charging box connecting device is characterized by comprising a first shell (1), a second shell (2) and a third shell (3); the third housing (3) is arranged between the first housing (1) and the second housing (2); two ends of the third shell (3) are respectively provided with a rotating shaft slot (5); one end of the first shell (1) and one end of the second shell (2) are respectively provided with a rotating shaft (4); the rotating shaft (4) is inserted into the rotating shaft slot (5); a limiting groove (6) extending along the circumferential direction of the rotating shaft (4) is formed in the outer wall of the rotating shaft; be equipped with stopper (7) on the inner wall of pivot slot (5), stopper (7) activity card is established spacing groove (6).

2. The earphone charging box connecting device according to claim 1, wherein the first casing (1), the second casing (2), the third casing (3) and the rotating shaft (4) are all hollow structures, so that a cavity penetrating through the first casing (1), the second casing (2) and the third casing (3) is formed inside the first casing (1), the second casing (2) and the third casing (3) after the first casing (1), the second casing (2) and the third casing (3) are assembled.

3. The earphone charging box connecting device according to claim 2, further comprising a spring, wherein both ends of the spring are respectively fixed to the two rotating shafts (4); the middle part of the spring is fixed with the third shell (3).

4. The earphone charging box connecting device according to claim 3, wherein the spring is a double torsion spring comprising a first spring body (8) and a second spring body (9); a first torsion arm (10) is arranged between the first spring body (8) and the second spring body (9); the outer ends of the first spring body (8) and the second spring body (9) are respectively provided with a second torsion arm (11); a first torsion arm clamping groove is formed in the inner wall of the third shell (3); and the inner walls of the two rotating shafts (4) are provided with second torque arm clamping grooves.

5. The earphone charging box connecting device as claimed in claim 4, further comprising a tubular spring support shaft (12); the middle part of the tubular spring support shaft (12) is arranged in the first spring body (8) and the second spring body (9) in a penetrating way; two ends of the tubular spring support shaft (12) are arranged in the two rotating shafts (4) in a penetrating way.

6. The connecting device for the charging box of the earphone according to claim 2, further comprising two silicone rings (13), wherein the inner end of the rotating shaft (4) is provided with an annular groove (14), and the silicone ring (13) is sleeved in the annular groove (14).

7. The earphone charging box connecting device according to any one of claims 1 to 6, wherein the angle between the two ends of the limiting groove (6) is 130 degrees.

8. An earphone charging box is characterized by comprising a lower box body (15), an upper box body (16) and a connecting device; the connecting means the earphone charging box connecting means of claim 7; the first shell (1) and the second shell (2) are fixed with the upper box body (16); the third shell (3) is fixed with the lower box body (15).

9. The earphone charging box according to claim 8, wherein the top of the lower case (15) and the end of the upper case (16) are provided with a first mounting groove (17) and a second mounting groove (18), respectively; the first mounting groove (17) and the second mounting groove (18) form a mounting groove matched with the peripheral shape of the connecting device.

10. The earphone charging box according to claim 9, wherein the bottom of the third housing (3) is provided with a third connecting portion (19); a third assembling groove (20) matched with the third connecting part (19) in shape is arranged in the first mounting groove (17); the third connecting portion (19) is inserted into the third fitting groove (20).

11. The earphone charging box according to claim 10, wherein the sides of the first and second housings (1, 2) are provided with a first connection portion (21) and a second connection portion (22), respectively; a first assembling groove (23) matched with the shape of the first connecting part (21) and a second assembling groove (24) matched with the shape of the second connecting part (22) are formed in the second installing groove (18); the first connecting portion (21) is inserted into the first fitting groove (23); the second connecting portion (22) is inserted into the second fitting groove (24).

12. The earphone charging box according to claim 11, wherein the first, second and third connection portions (21, 22, 19) have a hollow structure inside; the tops of the first connecting part (21), the second connecting part (22) and the third connecting part (19) are provided with first wiring holes (25); and the top parts of the first assembling groove (23), the second assembling groove (24) and the third assembling groove (20) are respectively provided with a second wiring hole (26) communicated with the first wiring hole (25).

13. The earphone charging box according to claim 12, wherein the first wire hole (25) or the second wire hole (26) is further provided with a tubular wire post (27) at the outside.