A nickel sheet, button cell and earphone assembly

Abstract

In order to improve the convenience of the disassembly and assembly of the button cell, and ensure the stable electrical connection of the battery during the charging and discharging process, the application provides a nickel sheet, a button cell and an earphone assembly, the nickel sheet is partially arranged outside the shell of the button cell, and is insulatedly connected with the shell; the nickel sheet comprises a first connecting part, a supporting part and a second connecting part, the supporting part connects the first connecting part and the second connecting part; the first connecting part is arranged at the end of the shell, and is electrically connected with the pole of the button cell; the supporting part is arranged at the side of the shell; the second connecting part comprises an elastic contact part, the elastic contact part is provided with a charging contact area; the elastic contact part is parallel to the tangent of the outer circumferential arc surface of the shell, and a gap is arranged between the elastic contact part and the arc surface.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a nickel sheet, a button cell and an earphone assembly. BACKGROUND

[0002] As a new type of battery technology, button cells are gradually widely used in the earphone industry. Button cells have the characteristics of small size, light weight, safety and high efficiency. Their compact size can better meet the design requirements of earphones. In recent years, as users demand more and more, the performance requirements of button cells in all aspects are more and more stringent.

[0003] Current wireless Bluetooth earphones generally use a non-detachable battery design. When the battery life decays, is affected by sweat and water stains, etc., the repair technology and cost are high. Moreover, the charging spring sheet of the earphone relies on mechanical pressure connection, which will cause stress relaxation of the spring sheet after long-term use, causing charging interruption and other problems. SUMMARY

[0004] The purpose of the present application is to provide a nickel sheet, a button cell and an earphone assembly to solve the problem of easy charging interruption of the charging spring sheet of the button cell in the prior art.

[0005] The technical solution adopted by the present application to solve the above technical problems is as follows:

[0006] In a first aspect, the present application provides a nickel sheet, which is partially arranged outside a shell of a button cell and is insulatedly connected with the shell. The nickel sheet comprises a first connecting portion, a supporting portion and a second connecting portion, the supporting portion connecting the first connecting portion and the second connecting portion. The first connecting portion is arranged at an end of the shell and is electrically connected with a pole of the button cell. The supporting portion is arranged at a side of the shell. The second connecting portion comprises an elastic contact portion, and a charging contact area is arranged on the elastic contact portion.

[0007] The tangent of the outer circumferential arc surface of the shell is parallel to the elastic contact portion, and a gap is arranged between the elastic contact portion and the arc surface. When the earphone is put into the earphone compartment, the elastic contact portion can be elastically moved to the side wall of the battery. The supporting portion limits the elastic contact portion between the side wall of the battery and the earphone compartment. The tangent of the extension surface of the plane where the elastic contact portion and the supporting portion are located is parallel to the arc surface, and the elastic contact portion deforms in the vertical plane. The gap between the elastic contact portion and the arc surface provides a buffer space for the transverse deformation of the elastic contact portion. The nickel sheet can be separately detached, has moderate size, low preparation process difficulty and strong anti-fatigue ability, and reduces the problem of poor earphone charging contact.

[0008] Optionally, the second connecting portion further comprises a first connecting segment, and the first connecting segment is connected with the supporting portion.

[0009] The elastic contact part comprises a second connecting section and a guide section, the second connecting section connects the first connecting section and the charging contact area, and the second connecting section is obliquely arranged from one end of the first connecting section to a side away from the arc surface; the guide section is connected to one end of the charging contact area away from the second connecting section, and the guide section is obliquely arranged from one end of the charging contact area to a side close to the arc surface. The oblique angle of the second connecting section provides an elastic deformation interval and a rebound force for the charging contact area, and the guide section limits the elastic deformation degree of the charging contact area, and at the same time provides guidance for the detachable installation of the nickel sheet in the charging bin through the guide section.

[0010] Optionally, the charging contact area is an arc surface connecting the second connecting section and the guide section, and the arc surface is concavely arranged away from the arc surface, so as to increase the electrical connection contact area with the earphone bin. The charging contact area realizes the electrical connection between the earphone button cell and the earphone bin, and realizes the charging of the earphone.

[0011] Optionally, the nickel sheet further comprises a connecting arm connecting the support part and the first connecting section, and a gap is formed between the elastic contact part and the support part. The gap formed between the elastic contact part and the support part facilitates the deformation of the elastic contact part, and at the same time, prevents the elastic contact part from being stuck between the support part and the battery after mechanical impact, so as to cause the earphone to be unable to charge.

[0012] Optionally, the first connecting part further comprises a notch part arranged at one side of the connecting part between the first connecting part and the support part, the extension direction of the support part is perpendicular to the extension direction of the first connecting part, and the support part is attached to the shell. The notch part is arc-shaped and smoothly connected with the support part, so as to facilitate the attachment of the support part to the peripheral surface of the battery.

[0013] Optionally, the nickel sheet further comprises a positioning protrusion arranged at one end of the first connecting part, and the positioning protrusion extends out of the arc surface away from one end of the first connecting part. The projection of the positioning protrusion on the bottom surface of the battery is beyond the elastic contact part, and the positioning protrusion realizes the positioning of the elastic contact part by cooperating with the positioning recess of the earphone bin.

[0014] Optionally, the first connecting part is provided with a recess part for connecting with the pole. The recess part can be circular, elliptical, square, etc., and is close to the shape of the end surface of the pole.

[0015] In a second aspect, the application provides a button cell, comprising a battery, a first insulating part, a second insulating part and the nickel sheet described above, the battery comprises a shell and a pole, the first insulating part is arranged between the nickel sheet and the shell;

[0016] The first connecting part is arranged on the end surface of the shell, is attached to the first insulating part, and is electrically connected to the pole column. The supporting part is arranged on one side of the peripheral surface of the shell and is attached to the peripheral surface of the first insulating part to isolate the shell from the nickel sheet.

[0017] The second insulating part is arranged on the side of the nickel sheet away from the first insulating part, reduces the risk of short circuit, and improves the stability of the button cell.

[0018] Optionally, the electric core further comprises a first polarity tab and a second polarity tab, and the nickel sheet, the first polarity tab, and the second polarity tab are sequentially arranged in the circumferential direction of the shell. By limiting the positional relationship between the nickel sheet and the tabs, the electromagnetic field inside the button cell is adjusted, and the earphone bottom noise problem caused by the button cell is reduced.

[0019] Optionally, the end surface of the shell is provided with an identification positioning part and a liquid injection hole. The installation position of the nickel sheet on the electric core is determined through the identification positioning part and the liquid injection hole, and the welding position of the nickel sheet is facilitated to be determined.

[0020] Optionally, the first insulating part comprises an end surface insulating part and a first circumferential insulating part. The end surface insulating part is provided with a first through hole and is arranged between the first connecting part and the end surface of the shell. The first through hole is arranged opposite to the pole column. The first through hole is used for the electrical connection between the recessed part of the nickel sheet and the pole column.

[0021] The end surface insulating part and the second insulating part are both provided with a second through hole. The second through hole is used for exposing the shell.

[0022] The first circumferential insulating part is attached to the peripheral surface of the shell. The projections of the supporting part and the second connecting part on the first circumferential insulating part are located on the circumferential insulating part, so as to avoid the short circuit caused by the contact between the nickel sheet and the shell. The thickness of the first circumferential insulating part is greater than that of the end surface insulating part, so as to prevent the first circumferential insulating part and the end surface insulating part from being damaged due to bending under external impact.

[0023] Optionally, the button cell further comprises a third insulating part. The third insulating part is arranged between the first insulating part and the second insulating part. The third insulating part is provided with a first notch and a second notch. The nickel sheet is accommodated in the first notch. The second notch is arranged opposite to the second through hole. The thickness of the third insulating part is the same as that of the nickel sheet, and the third insulating part is flush with the nickel sheet. The third insulating part is used for filling the empty part inside the button cell and limiting the position of the nickel sheet.

[0024] Optionally, the nickel sheet comprises a positioning protrusion, the second insulating piece further comprises a protruding part and a second circumferential insulating part, the protruding part is attached to the positioning protrusion and covers the positioning protrusion, and the second circumferential insulating part is attached to the supporting part and is arranged on the side of the supporting part away from the first insulating piece. The protruding part of the second insulating piece realizes positioning installation of the second insulating piece and plays the role of insulating the positioning protrusion of the nickel sheet, thereby preventing short circuit.

[0025] In a third aspect, the application provides an earphone assembly, comprising an earphone and an earphone charging box, the earphone comprising the above-mentioned button cell, the earphone being capable of being accommodated in an earphone compartment of the earphone charging box, and the charging contact area being in elastic contact with the earphone compartment.

[0026] The earphone compartment comprises a metal contact, and the metal contact is electrically connected with the shell. The metal contact (pogo pin) of the earphone compartment is electrically connected with the shell through the second through hole of the first insulating piece and the second insulating piece.

[0027] In the application, the button cell is assembled by using a detachable component connection mode, so that the button cell is convenient to disassemble and assemble, and the efficient charging and discharging performance and the insulation safety of the button cell are ensured.

[0028] The elastic nickel sheet in the button cell has the advantages of accurate positioning, stable connection, long service life, and good contact after bearing a certain mechanical impact.

[0029] The button cell and the earphone assembly of the application adjust the electromagnetic field in the button cell by limiting the positional relationship between the nickel sheet and the tab, thereby reducing the bottom noise problem of the earphone caused by the button cell. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] Figure 1 is a nickel sheet structure schematic diagram in an embodiment of the application;

[0032] Figure 2 is a battery explosion structure schematic diagram in an embodiment of the application;

[0033] Figure 3 is a battery structure schematic diagram in an embodiment of the application;

[0034] Figure 4is a first insulating piece structure schematic diagram in an embodiment of the present application;

[0035] Figure 5 is a second insulating piece structure schematic diagram in an embodiment of the present application;

[0036] Figure 6 is a third insulating piece structure schematic diagram in an embodiment of the present application;

[0037] Figure 7 is a top view schematic diagram of a button cell in an embodiment of the present application.

[0038] Main element symbol explanation:

[0039] 1, nickel sheet; 11, first connecting part; 111, notch part; 112, recessed part; 12, support part; 13, second connecting part; 131, first connecting section; 132, second connecting section; 133, guide section; 14, elastic contact part; 141, charging contact area; 15, connecting arm; 16, positioning protrusion; 100, camber surface;

[0040] 2, battery cell; 21, first polarity tab; 22, second polarity tab;

[0041] 3, first insulating piece; 31, end surface insulating part; 32, first circumferential insulating part; 33, first through hole; 34, second through hole;

[0042] 4, second insulating piece; 42, protruding part; 43, second circumferential insulating part;

[0043] 5, third insulating piece; 51, first notch; 52, second notch;

[0044] 61, identification positioning part; 62, liquid injection hole. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects solved by the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0046] The present application is further described below through embodiments.

[0047] As Figure 1As shown, an embodiment of the present application provides a nickel sheet, which is partially arranged outside the shell of a button cell and is insulatedly connected with the shell; the nickel sheet 1 comprises a first connecting part 11, a supporting part 12 and a second connecting part 13, the supporting part 12 connects the first connecting part 11 and the second connecting part 13; the first connecting part 11 is arranged at the end of the shell and is electrically connected with the pole of the button cell; the supporting part 12 is arranged at the side of the shell; the second connecting part 13 comprises an elastic contact part 14, the elastic contact part 14 is provided with a charging contact area 141, the surface of the charging contact area 141 is plated with a gold or silver strong conductive layer; the elastic contact part 14 is parallel to the tangent of the peripheral arc surface 100 of the shell, and a gap is arranged between the elastic contact part 14 and the arc surface 100.

[0048] Specifically, when the earphone is put into the earphone compartment, the elastic contact part 14 can be elastically moved to the side wall of the battery; the supporting part 12 limits the elastic contact part 14 between the side wall of the battery and the earphone compartment; the elastic contact part 14 is parallel to the tangent of the extension surface of the arc surface, and the elastic contact part 14 is laterally deformed in a vertical plane, so that the elastic contact part 14 is easy to deform and rebound. The gap between the elastic contact part 14 and the arc surface 100 provides a buffer space for the lateral deformation of the elastic contact part 14, the nickel sheet 1 can be separately detached, has moderate size, low preparation process difficulty, strong anti-fatigue ability, and reduces the problem of poor earphone charging contact.

[0049] In some embodiments, the second connecting part 13 further comprises a first connecting section 131, which is connected with the supporting part 12;

[0050] The elastic contact part 14 comprises a second connecting section 132 and a guide section 133, the second connecting section 132 connects the first connecting section 131 and the charging contact area 141, and is arranged obliquely away from the arc surface 100 from one end of the first connecting section 131; the guide section 133 is connected with one end of the charging contact area 141 away from the second connecting section 132, and is arranged obliquely close to the arc surface 100 from one end of the charging contact area 141.

[0051] Specifically, the inclination angle of the second connecting section 132 is 63°-67°, which provides an elastic deformation interval and a rebound force for the charging contact area 141, the guide section 133 limits the elastic deformation degree of the charging contact area 141, and simultaneously provides guidance for the detachable installation of the nickel sheet in the charging compartment.

[0052] In some embodiments, the charging contact area 141 is an arc-shaped surface connecting the second connecting section 132 and the guiding section 133, which is concavely arranged in a direction away from the arc surface 100, thereby increasing the contact area for electrical connection with the earphone compartment.

[0053] Specifically, the charging contact area 141 realizes the electrical connection between the button-type battery in the earphone and the earphone compartment, and realizes the charging of the earphone. The side of the elastic contact area facing the charging compartment is plated with a conductive layer, and the material of the conductive layer includes but is not limited to gold or silver.

[0054] In some embodiments, the nickel sheet 1 further comprises a connecting arm 15 connecting the supporting part 12 and the first connecting section 131, and a gap is formed between the elastic contact part 14 and the supporting part 12.

[0055] Specifically, the connecting arm 15 and the first connecting section 131 are arc-shaped and fit the surface of the battery 2, and the gap width is 0.5-0.55 mm. The gap formed between the elastic contact part 14 and the supporting part 12 facilitates the deformation of the elastic contact part 14, and prevents the elastic contact part 14 from being stuck between the supporting part 12 and the battery 2 after mechanical impact, thereby preventing the earphone from being unable to charge.

[0056] In some embodiments, the first connecting part 11 further comprises a notch part 111 arranged on one side of the connecting part between the first connecting part 11 and the supporting part 12. The extension direction of the supporting part 12 is perpendicular to the extension direction of the first connecting part 11, and the supporting part 12 is an arc surface and fits the shell.

[0057] Specifically, the notch part 111 is arc-shaped and smoothly connects the supporting part 12, thereby facilitating the fitting of the supporting part 12 with the surface of the battery 2.

[0058] In some embodiments, the nickel sheet 1 further comprises a positioning protrusion 16 arranged at one end of the first connecting part 11, and the positioning protrusion 16 extends out of the arc surface 100 away from the one end of the first connecting part 11.

[0059] Specifically, the projection of the positioning protrusion 16 on the bottom surface of the battery 2 exceeds the elastic contact part 14, and the positioning protrusion 16 realizes the positioning of the elastic contact part 14 by cooperating with the positioning recess of the earphone compartment.

[0060] In some embodiments, the first connecting part 11 is provided with a recess part 112 for connecting with the pole.

[0061] Specifically, the recess part 112 can be circular, elliptical, square, etc., and is close to the shape of the end surface of the pole. The depth of the recess part 112 is 0.1-0.15 mm.

[0062] As Figures 2-3 shown, an embodiment of the present application provides a button cell, comprising a cell 2, a first insulating piece 3, a second insulating piece 4 and the above-mentioned nickel sheet 1, the cell 2 comprises a shell and a pole, the first insulating piece 3 is arranged between the nickel sheet 1 and the shell;

[0063] The first connecting part 11 is arranged on the end face of the shell, is attached to the first insulating piece 3, and is electrically connected to the pole, and the supporting part 12 is arranged on one side of the circumferential surface of the shell, and the supporting part 12 is attached to the circumferential surface of the first insulating piece 3, thereby isolating the shell from the nickel sheet 1.

[0064] The second insulating piece 4 is arranged on the side of the nickel sheet 1 away from the first insulating piece 3.

[0065] Specifically, the first insulating piece 3 and the second insulating piece 4 are used to reduce the risk of short circuit and improve the stability of the button cell.

[0066] In some embodiments, as Figure 7 shown, the cell 2 further comprises a first polarity tab 21 and a second polarity tab 22, and the nickel sheet 1, the first polarity tab 21 and the second polarity tab 22 are arranged in sequence in the circumferential direction of the shell. In the plane of the end face of the shell, with the center of the end face of the shell as the center of the circle, the central angle of the circle formed by the projection of the nickel sheet 1 and the first polarity tab 21 on the end face is 40°-60°, and the polarity of the first polarity tab 21 is the same as that of the nickel sheet 1.

[0067] Specifically, by fixing the angle of the central angle between the tab of the same polarity and the nickel sheet 1 within the range of 40°-60°, the effect of reducing the noise of the earphone can be achieved, without the need to increase additional components, so as to reduce the weight and volume of the button cell, and meet the current technical route of pursuing high sound quality, light weight, small size and the like of earphones. When calculating the central angle, the straight line passing through one side of the nickel sheet 1 is taken as one side of the central angle.

[0068] In some embodiments, the end face of the shell is provided with an identification positioning part 61 and a liquid injection hole 62, the central angle of the circle formed by the identification positioning part 61 and the liquid injection hole 62 on the end face is 68°-72°, the liquid injection hole 62 is arranged between the first polarity tab 21 and the second polarity tab 22, the central angle of the circle formed by the projection of the first polarity tab 21 and the liquid injection hole 62 on the end face is 40°-50°, the central angle of the circle formed by the projection of the second polarity tab 22 and the liquid injection hole 62 on the end face is 40°-50°, and the central angle of the circle formed by the projection of the identification positioning part 61 and the first polarity tab 21 on the end face is 15°-35°.

[0069] Specifically, since the tab has been fixed inside the battery cell 2 when the nickel sheet 1 is installed, the exact position of the tab cannot be determined from appearance, so it is inferred from the position of the liquid injection hole 62 on the surface of the shell of the battery cell 2, and the liquid injection hole 62 causes a central deviation after sealing, so the welding position of the nickel sheet 1 is further inferred by the position of the identification positioning part 61. When calculating the central angle, the straight line passing through the center of the identification positioning part 61, i.e. the center of the two-dimensional code identification area, and the center of the liquid injection hole 62 is taken as one side of the central angle.

[0070] In some embodiments, as shown in Figures 4-5 The first insulating piece 3 includes an end face insulating part 31 and a first circumferential insulating part 32, the end face insulating part 31 is provided with a first through hole 33, the end face insulating part 31 is arranged between the first connecting part 11 and the end face of the shell; the first through hole 33 is arranged opposite to the pole column;

[0071] The end face insulating part 31 and the second insulating piece 4 are both provided with a second through hole 34, which is used to expose the shell;

[0072] The first circumferential insulating part 32 is attached to the circumferential surface of the shell, and the projection of the support part 12 and the second connecting part 13 on the first circumferential insulating part 32 is located on the circumferential insulating part, avoiding short circuit caused by contact between the nickel sheet 1 and the shell.

[0073] Specifically, the first through hole 33 is used for electrical connection between the recessed part 112 of the nickel sheet 1 and the pole column, and the thickness of the first circumferential insulating part 32 is greater than that of the end face insulating part 31, so as to prevent the first circumferential insulating part 32 from being damaged due to bending when subjected to external impact.

[0074] As shown in Figure 6 In some embodiments, the button cell further includes a third insulating piece 5, which is arranged between the first insulating piece 3 and the second insulating piece 4, and the third insulating piece 5 is provided with a first notch 51 and a second notch 52, the nickel sheet 1 is accommodated in the first notch 51, and the second notch 52 is arranged opposite to the second through hole 34.

[0075] Specifically, the thickness of the third insulating piece 5 is the same as that of the nickel sheet 1, and is flush with the nickel sheet 1, which is used to fill the empty part inside the button cell and define the position of the nickel sheet 1.

[0076] In some embodiments, the nickel sheet 1 comprises a positioning protrusion 16, the second insulating piece 4 further comprises a protruding part 42 and a second circumferential insulating part 43, the protruding part 42 is in contact with the positioning protrusion 16 and covers the positioning protrusion 16, and the second circumferential insulating part 43 is in contact with the supporting part 12 and is arranged on the side of the supporting part 12 away from the first insulating piece 3.

[0077] Specifically, the protruding part 42 of the second insulating piece 4 realizes the positioning installation of the second insulating piece 4 and plays the role of insulating the positioning protrusion 16 of the nickel sheet 1, preventing short circuit.

[0078] An embodiment of the present application provides an earphone assembly, comprising an earphone and an earphone charging box, the earphone comprises the above-mentioned buckle type battery, the earphone can be accommodated in an earphone compartment of the earphone charging box, and the charging contact area 141 is in elastic contact with the earphone compartment.

[0079] The earphone compartment comprises a metal contact, and the metal contact is electrically connected with the shell.

[0080] Specifically, the metal contact (pogo pin) of the earphone compartment is electrically connected with the shell through the second through hole 34 of the first insulating piece 3 and the second insulating piece 4.

[0081] The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A nickel sheet, which is partially disposed outside a housing of a button cell and is connected to the housing in an insulating manner; characterized in that, The nickel sheet (1) comprises a first connecting part (11), a supporting part (12) and a second connecting part (13), the supporting part (12) connects the first connecting part (11) and the second connecting part (13); The first connecting part (11) is arranged at the end of the shell and is electrically connected with the pole of the button cell; The supporting part (12) is arranged at the side of the shell; The second connecting part (13) comprises an elastic contact part (14), and a charging contact area (141) is arranged on the elastic contact part (14); The elastic contact part (14) is parallel to the tangent of the outer circumferential arc surface (100) of the shell, and a gap is arranged between the elastic contact part (14) and the arc surface (100); The second connecting part (13) further comprises a first connecting section (131), and the first connecting section (131) is connected with the supporting part (12); The elastic contact part (14) comprises a second connecting section (132) and a guide section (133), the second connecting section (132) connects the first connecting section (131) and the charging contact area (141), and the second connecting section (132) is arranged to be inclined from one end of the first connecting section (131) to the side away from the arc surface (100); the guide section (133) is connected with one end of the charging contact area (141) away from the second connecting section (132), and the guide section (133) is arranged to be inclined from one end of the charging contact area (141) to the side close to the arc surface (100).

2. The nickel sheet according to claim 1, characterized by The charging contact area (141) is an arc surface connecting the second connecting section (132) and the guide section (133), and the arc surface is arranged to be concave away from the arc surface (100).

3. The nickel sheet according to claim 1, wherein The nickel sheet (1) further comprises a connecting arm (15), the connecting arm (15) connects the supporting part (12) and the first connecting section (131), and a gap is formed between the elastic contact part (14) and the supporting part (12).

4. The nickel sheet according to claim 1, wherein The first connecting part (11) further comprises a notch part (111), the notch part (111) is arranged at one side of the connecting part between the first connecting part (11) and the supporting part (12), the extending direction of the supporting part (12) is perpendicular to the extending direction of the first connecting part (11), and the supporting part (12) is attached to the shell.

5. The nickel sheet according to claim 1, wherein The nickel sheet (1) further comprises a positioning protrusion (16), the positioning protrusion (16) is arranged at one end of the first connecting part (11), and the positioning protrusion (16) extends out of the arc surface (100) away from one end of the first connecting part (11).

6. The nickel sheet according to claim 1, wherein The first connecting part (11) is provided with a recess (112) for connecting with the pole.

7. A button cell battery characterized by, The nickel sheet (1) further comprises a connecting arm (15), the connecting arm (15) connects the supporting part (12) and the first connecting section (131), and a gap is formed between the elastic contact part (14) and the supporting part (12). The first connecting part (11) further comprises a notch part (111), the notch part (111) is arranged at one side of the connecting part between the first connecting part (11) and the supporting part (12), the extending direction of the supporting part (12) is perpendicular to the extending direction of the first connecting part (11), and the supporting part (12) is attached to the shell. The nickel sheet (1) further comprises a positioning protrusion (16), the positioning protrusion (16) is arranged at one end of the first connecting part (11), and the positioning protrusion (16) extends out of the arc surface (100) away from one end of the first connecting part (11). The first connecting part (11) is provided with a recess (112) for connecting with the pole. The nickel sheet (1) further comprises a connecting arm (15), the connecting arm (15) connects the supporting part (12) and the first connecting section (131), and a gap is formed between the elastic contact part (14) and the supporting part (12). The first connecting part (11) is arranged on the end surface of the shell, is attached to the first insulating part (3), and is electrically connected to the pole; the supporting part (12) is arranged on one side of the peripheral surface of the shell, and is attached to the peripheral surface of the first insulating part (3); The second insulating part (4) is arranged on the side of the nickel sheet (1) away from the first insulating part (3).

8. The button cell of claim 7, wherein, The electric core (2) further comprises a first polarity tab (21) and a second polarity tab (22), and the nickel sheet (1), the first polarity tab (21), and the second polarity tab (22) are sequentially arranged in the circumferential direction of the shell.

9. The button cell of claim 7, wherein, The end surface of the shell is provided with an identification positioning part (61) and a liquid injection hole (62).

10. The button cell of claim 7, wherein, The first insulating part (3) comprises an end surface insulating part (31) and a first circumferential insulating part (32), the end surface insulating part (31) is provided with a first through hole (33), and the end surface insulating part (31) is arranged between the first connecting part (11) and the end surface of the shell; the first through hole (33) is arranged opposite to the pole; The end surface insulating part (31) and the second insulating part (4) are both provided with a second through hole (34), and the second through hole (34) is used for exposing the shell; The first circumferential insulating part (32) is attached to the peripheral surface of the shell, and the projections of the supporting part (12) and the second connecting part (13) on the first circumferential insulating part (32) are located on the first circumferential insulating part (32).

11. The button cell of claim 10, wherein, The button cell further comprises a third insulating part (5), the third insulating part (5) is arranged between the first insulating part (3) and the second insulating part (4), the third insulating part (5) is provided with a first notch (51) and a second notch (52), the nickel sheet (1) is accommodated in the first notch (51), and the second notch (52) is arranged opposite to the second through hole (34).

12. The button cell of claim 7, wherein, The nickel sheet (1) comprises a positioning protrusion (16), the second insulating part (4) further comprises a protruding part (42) and a second circumferential insulating part (43), the protruding part (42) is attached to the positioning protrusion (16) and covers the positioning protrusion (16); and the second circumferential insulating part (43) is attached to the supporting part (12) and is arranged on the side of the supporting part (12) away from the first insulating part (3).

13. An earphone assembly, characterized by The earphone comprises the button cell as claimed in any one of claims 7-12, and the earphone can be accommodated in an earphone compartment of the earphone charging box, and the charging contact area (141) is in elastic contact with the earphone compartment. The earphone compartment comprises a metal contact, and the metal contact is electrically connected to the shell.

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