Charging interface structure of wireless earphone charging box

Abstract

The utility model discloses a charging interface structure of a wireless earphone charging box, the wireless earphone charging box comprises an upper cover and a housing, the top of the housing is provided with a recess used for placing an earphone, and the recess is provided with a charging interface; comprising a charging elastic sheet, an elastic sheet fixing groove and a PCB. The shell is designed to be hollow; the elastic sheet fixing groove is formed in the inner wall of the concave part in the shell; the charging port is an outlet of the elastic sheet fixing groove; the charging elastic piece is installed in the elastic piece fixing groove, one end of the charging elastic piece stretches out of the charging port and is used for being electrically connected with a charging interface in the wireless earphone, and the other end of the charging elastic piece is fixed to the PCB and electrically connected with the output end of a charging circuit on the PCB. According to the utility model, the deformation of the charging elastic sheet in the links of testing, transportation, operation and the like can be avoided, so that the supportability of the elastic sheet and the quality of the whole charging box are improved.

Description

Technical Field

[0001] This utility model relates to the field of charging case technology, and in particular to a charging interface structure for a wireless earphone charging case. Background Technology

[0002] In existing wireless earbuds, the left and right earbuds are charged via contact springs with the charging case. There are four charging springs in total, one for the positive and one for the negative of the left earbud, and one for the positive and one for the negative of the right earbud. Currently, these charging springs are typically fixed to the same PCBA board using a surface-mount method before being assembled into the casing. For example, patent 201920710517.8 discloses a PCB board connection structure and earbud charging case where the springs are directly fixed to the PCBA board. However, because the springs are easily deformed, the following drawbacks exist:

[0003] 1. After the PCBA board is assembled, it needs to undergo testing at multiple workstations. During the testing process, human operation can easily cause deformation of the spring contacts.

[0004] 2. After the PCBA board passes the test, it needs to be packaged and transported to the assembly plant. During transportation, bumps and vibrations can easily cause the spring contacts to deform.

[0005] 3. When assembling PCBA boards, the spring clips need to be assembled into the inner lower shell slot. Because there are tolerances after the four spring clips are attached, and it is difficult for employees to align them during the assembly process, the spring clips may easily come into contact with the plastic parts and cause deformation.

[0006] If the spring is deformed as described above, the charging function will fail. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a charging interface structure for a wireless earphone charging case, which can avoid deformation of the charging spring during testing, transportation, and operation, thereby improving the protection of the spring and the overall quality of the charging case.

[0008] To solve the above-mentioned technical problems, this utility model discloses a charging interface structure for a wireless earphone charging case. The wireless earphone charging case includes a top cover and a shell. The top of the shell is provided with a recess for placing earphones, and a charging port is provided on the recess. It includes a charging spring, a spring fixing groove, and a PCB board.

[0009] The outer shell is hollow, and the spring clip fixing groove is installed on the inner wall of the recess inside the outer shell;

[0010] The charging port is the outlet of the spring clip fixing slot;

[0011] The charging spring is installed in the spring fixing slot. One end of the charging spring extends out of the charging port for electrical connection to the charging interface on the wireless earphone. The other end of the charging spring is fixed to the PCB board and electrically connected to the output terminal of the charging circuit on the PCB board.

[0012] As an optional implementation, the PCB board is provided with through holes for fixing the charging spring, and solder pads are provided around the through holes.

[0013] As another optional implementation, the number of charging contacts is four, corresponding to the positive terminal of the left earphone, the negative terminal of the left earphone, the positive terminal of the right earphone, and the negative terminal of the right earphone, respectively.

[0014] As another optional implementation, one end of the charging spring is welded and fixed to the PCB board.

[0015] As another optional implementation, the charging spring and the spring fixing groove are in clearance fit.

[0016] As another optional implementation, the tolerance of the clearance fit between the charging spring and the spring fixing groove is 0.1 to 1 mm.

[0017] As another optional implementation, the wireless earphone charging case further includes an external threaded fastener; the outer shell is provided with an internal threaded post, and the PCB board is provided with a fixing through hole, the external threaded fastener passes through the fixing through hole and is threadedly connected to the internal threaded post to lock the PCB board.

[0018] As another alternative implementation, the internally threaded post is disposed between the recess of the left earphone and the recess of the right earphone.

[0019] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0020] In this embodiment of the utility model, the spring is placed separately in the spring fixing slot to avoid deformation of the spring during testing, transportation, and operation. When installation is required, the PCB board is mounted on the outer shell, and then the spring is fixed on the PCB board, thus realizing the installation of the spring. This method can avoid deformation of the spring during testing, transportation, and operation, thereby improving the reliability of the spring and the quality of the whole product. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the charging interface structure of a wireless earphone charging case disclosed in an embodiment of this utility model;

[0023] Figure 2 This is another structural schematic diagram of the charging interface structure of a wireless earphone charging case disclosed in this utility model embodiment. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] See Figures 1-2 This utility model discloses a charging interface structure for a wireless earphone charging case. The wireless earphone charging case includes a top cover and a shell 1. The top of the shell 1 is provided with a recess 11 for placing earphones (the convex surface of the back of the recess 11 is shown in the figure). The recess 11 is provided with a charging port (not shown in the figure). It includes a charging spring 2, a spring fixing groove 3 and a PCB board 4.

[0026] The outer shell 1 is hollow, and the spring clip fixing groove 3 is installed on the inner wall of the recess 11 inside the outer shell 1;

[0027] The charging port is the outlet of the spring clip fixing slot 3;

[0028] The charging spring 2 is installed in the spring fixing slot 3. One end of the charging spring 2 extends out of the charging port for electrical connection to the charging interface on the wireless earphone. The other end of the charging spring 2 is fixed on the PCB board 4 and electrically connected to the output terminal of the charging circuit on the PCB board 4.

[0029] In this embodiment of the utility model, the spring piece 2 is placed separately in the spring piece fixing slot 3 to avoid deformation of the spring piece during testing, transportation, operation and other processes. When installation is required, the PCB board is installed on the outer shell 1, and then the spring piece is fixed on the PCB board, thus realizing the installation of the spring piece. This method can avoid deformation of the spring piece during testing, transportation and operation and other processes, thereby improving the reliability of the spring piece and the quality of the whole product.

[0030] In an optional embodiment, the PCB board 4 is provided with a through hole 41 for fixing the charging spring 2, and the through hole 41 is surrounded by solder pads.

[0031] In another optional embodiment, the number of charging contacts 2 is four, corresponding to the positive terminal of the left earphone, the negative terminal of the left earphone, the positive terminal of the right earphone, and the negative terminal of the right earphone, respectively.

[0032] In another optional embodiment, one end of the charging spring 2 is welded and fixed to the PCB board 4.

[0033] In another optional embodiment, the charging spring 2 is clearance-fitted with the spring fixing groove 3.

[0034] In another optional embodiment, the tolerance of the clearance fit between the charging spring 2 and the spring fixing groove 3 is 0.1 to 1 mm.

[0035] In another optional embodiment, the wireless earphone charging case further includes an external threaded fastener 5; the outer shell 1 is provided with an internal threaded post 12, and the PCB board 4 is provided with a fixing through hole 42, the external threaded fastener 5 passes through the fixing through hole 42 and is threadedly connected to the internal threaded post 12 to lock the PCB board 4.

[0036] In another alternative embodiment, the internally threaded post is disposed between the recess 11 of the left earphone and the recess 11 of the right earphone.

[0037] In this embodiment, the recess 11 of the outer shell 1 is designed with four spring-loaded positioning slots (such as...). Figure 2 As shown), insert the four spring clips into the positioning slots of the inner lower shell respectively (as shown). Figure 1 As shown), the PCB (A) board has 4 through holes (spring clip holes), with a 0.35mm gap on each side. Pads are designed around the holes (e.g., Figure 2 (As shown), then install the PCB(A) board into the housing, insert the four holes of the board into the four spring clips, solder and tighten the screws to secure it. After assembly, it should look like... Figure 1 As shown.

[0038] The contents disclosed in this utility model embodiment are merely preferred embodiments of this utility model and are only used to illustrate the technical solutions of this utility model, not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A charging interface structure of a wireless earphone charging box, the wireless earphone charging box comprising a top cover and a shell, a top of the shell being provided with a recess for placing an earphone, the recess being provided with a charging port; characterized in that, The charging spring sheet, spring sheet fixing groove and PCB board are included; The spring sheet fixing groove is installed on the inner wall of the recess in the hollow shell; The charging port is the outlet of the spring sheet fixing groove; The charging spring sheet is installed in the spring sheet fixing groove, one end of the charging spring sheet extends out of the charging port for electrically connecting the charging interface on the wireless earphone, and the other end of the charging spring sheet is fixed on the PCB board and electrically connected with the output end of the charging circuit on the PCB board.

2. The charging interface structure according to claim 1, characterized in that, A through hole for fixing the charging spring sheet is arranged on the PCB board, and a solder pad is arranged around the through hole.

3. The charging interface structure according to claim 1, characterized in that, The number of the charging spring sheets is four, which correspond to the positive electrode of the left earphone, the negative electrode of the left earphone, the positive electrode of the right earphone and the negative electrode of the right earphone respectively.

4. The charging interface structure according to claim 1 or 2, characterized by, One end of the charging spring sheet is welded and fixed on the PCB board.

5. The charging interface structure according to claim 1, characterized by, The charging spring sheet and the spring sheet fixing groove are gap-fitted.

6. The charging interface structure according to claim 5, characterized in that, The tolerance of the gap-fitted charging spring sheet and spring sheet fixing groove is 0.1-1mm.

7. The charging interface structure according to claim 1, characterized by The wireless earphone charging box further includes an external thread fastener; an internal thread column is arranged in the shell, a fixing through hole is arranged on the PCB board, and the external thread fastener is threadedly connected with the internal thread column through the fixing through hole to clamp the PCB board.

8. The charging interface structure according to claim 7, characterized in that, The internal thread column is arranged between the recess of the left earphone and the recess of the right earphone.

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