CN111988694A - Earphone and assembling method thereof - Google Patents

Abstract

The invention provides an earphone, and relates to the technical field of earphones. The shell is provided with an appearance surface, and the shell is provided with a limiting hole penetrating through the appearance surface. The circuit board is disposed within the housing. The charging assembly is electrically connected with the circuit board and is provided with a contact surface used for being abutted against external charging equipment, the limiting hole is matched with the charging assembly to limit the mounting position of the charging assembly, and the contact surface is smoothly butted with the appearance surface. Through the limiting effect of the limiting hole, the smooth butt joint of the contact surface and the appearance surface of the shell at the determined installation position can be ensured, and therefore the integrity of the outer surface of the earphone is improved. On the other hand can prevent that the dust from gathering on the surface, ensures that the contact surface can form good contact with external charging equipment's the terminal that charges, guarantees that the contact surface keeps contact with the terminal that charges and makes the subassembly that charges have good electric conductive property, improves the charging stability of earphone.

Description

Earphone and assembling method thereof

Technical Field

The invention relates to the technical field of earphones, in particular to an earphone and an assembling method.

Background

With the rapid development of science and technology, electronic devices such as smart phones and tablet computers have been developed in succession, and have been widely used in many fields. The electronic equipment makes the importance of the matching products such as earphones increasingly prominent. In order to improve the convenience of earphone usage and get rid of the interference of traditional earphone connecting wires in the using and storing processes, bluetooth earphones developed based on bluetooth chip technology are coming out one after another. To traditional bluetooth headset, adopt usually to wear to establish copper post and external battery charging outfit butt in bluetooth headset's the casing to the realization is to bluetooth headset's charging. However, after the installation of the copper cylinder is completed, various stains may be accumulated at a dead angle position at the end of the copper cylinder, thereby affecting the charging stability of the entire earphone.

Disclosure of Invention

The invention solves the technical problem of ensuring the charging stability of the earphone.

An earphone, comprising:

the shell is provided with an appearance surface, and the shell is provided with a limiting hole penetrating through the appearance surface; a circuit board disposed within the housing, an

The charging assembly is electrically connected with the circuit board and is provided with a contact surface used for being abutted against external charging equipment, the limiting hole is matched with the charging assembly to limit the mounting position of the charging assembly, and the contact surface is smoothly butted with the appearance surface.

In one embodiment, the charging assembly includes a first elastic sheet and a second elastic sheet, the first elastic sheet is inserted into the limiting hole, the second elastic sheet is fixed on the circuit board, and the first elastic sheet and the second elastic sheet are mutually abutted.

In one embodiment, the housing has an inner surface facing opposite to the appearance surface, the limiting hole comprises a step hole and a first through hole which are communicated with each other, the step hole is formed by the appearance surface in a concave mode, and the first through hole is formed by the bottom wall surface of the step hole in a concave mode and penetrates through the inner surface;

the first elastic sheet comprises a contact sheet and a first connecting sheet, the contact surface is arranged on the contact sheet, one end of the first connecting sheet is fixed on the surface, opposite to the contact surface, of the contact sheet, the contact sheet is matched with the stepped hole, and the first connecting sheet penetrates through the first through hole and is abutted against the second elastic sheet.

In one embodiment, the housing includes a boss, the boss is connected to the inner surface and protrudes relative to the inner surface, the first connecting piece includes a first connecting section and a second connecting section, one end of the first connecting section is fixed on the contact piece, the second connecting section is connected with the other end of the first connecting section in a bending manner, and the second connecting section abuts against between the boss and the second elastic piece.

In one embodiment, the limiting hole further includes a second through hole spaced apart from the first through hole, the second through hole is formed by a depression of a bottom wall surface of the stepped hole and penetrates through the inner surface, the first elastic piece further includes a second connecting piece spaced apart from the first connecting piece, the second connecting piece is fixed on a surface of the contact piece opposite to the contact surface, and a portion of the second connecting piece is attached to the inner surface and abuts against the housing.

In one embodiment, the second elastic sheet comprises a fixing sheet and a butting sheet, the butting sheet is connected with the fixing sheet at an included angle, the fixing sheet is fixedly arranged on the circuit board, and the butting sheet is elastically connected with the fixing sheet and butted against the first elastic sheet.

In one embodiment, the first elastic sheet has a first abutting surface facing the second elastic sheet, the second elastic sheet has a second abutting surface facing the first elastic sheet, the first abutting surface and the second abutting surface abut against each other, the first abutting surface is a plane, the second abutting surface is a circular arc curved surface, and the area of the first abutting surface is larger than that of the second abutting surface.

In one of them embodiment, still including being located the cementing layer in the spacing hole, cementing layer connects the casing with between the subassembly charges, cementing layer is used for sealing the casing with the gap between the subassembly charges.

In one embodiment, the contact surface is a curved surface or a flat surface.

An assembly method comprising the steps of:

the first elastic sheet is arranged in the limiting hole of the shell in a penetrating mode;

fixing the second elastic sheet on the circuit board;

the circuit board fixed with the second elastic sheet is accommodated in the shell, and the first connecting sheet on the first elastic sheet is bent so that the first elastic sheet abuts against between the shell and the second elastic sheet; and

and pouring glue into the limiting hole so that the glue is solidified into a glue joint layer sealed in a gap between the shell and the first elastic sheet.

One technical effect of one embodiment of the invention is that: through the limiting effect of the limiting hole, the charging assembly can be effectively prevented from rotating relative to the limiting hole to change the installation position, so that the installation position of the charging assembly on the shell is determined, then the installation position of the contact surface is determined, and finally the smooth butt joint of the contact surface and the appearance surface of the shell at the determined installation position is ensured, namely the tangent planes of the contact surface and the appearance surface at the butt joint are overlapped to keep a mutual 'parallel and level' relationship. In view of the surface of earphone including the contact surface of the subassembly that charges and the outward appearance face of casing, can prevent like this on the one hand that the unsmooth structure from appearing in the earphone surface, guarantee that the earphone surface forms muddy integrative visual perception, improve the integrality of earphone surface. On the other hand can prevent that the dust from gathering in unsmooth structure department, ensures that the contact surface can form good contact with external battery charging outfit's the terminal that charges, guarantees that the contact surface keeps contacting with the terminal that charges and makes the subassembly that charges have good electric conductive property, improves the charging stability of earphone.

Drawings

Fig. 1 is a schematic perspective view of an earphone according to an embodiment;

fig. 2 is an exploded view of the earphone shown in fig. 1;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

fig. 4 is a schematic perspective cross-sectional structure view of the earphone shown in fig. 1;

fig. 5 is a schematic partial structural view of the earphone shown in fig. 1 including a housing and a first resilient piece;

fig. 6 is a partial structural schematic view of a housing of the headset shown in fig. 1;

FIG. 7 is a schematic plan view of the structure of FIG. 6;

fig. 8 is a schematic perspective view of a first elastic piece in the earphone shown in fig. 1;

fig. 9 is a schematic perspective view of a second elastic piece in the earphone shown in fig. 1;

FIG. 10 is a block flow diagram of an assembly method according to an embodiment.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Referring to fig. 1, fig. 2 and fig. 3, an earphone 10 according to an embodiment of the present invention is a rechargeable bluetooth earphone, and the earphone 10 includes a housing 100, a circuit board 200 and a charging assembly 300. The circuit board 200 is disposed in the casing 100, the charging assembly 300 is disposed in the casing 100 and electrically connected to the circuit board 200, and when the charging assembly 300 abuts against a charging terminal in an external charging device such as a charging box, the charging box can charge the battery in the earphone 10 through the charging assembly 300 and the circuit board 200, so that the battery can supplement energy for recycling.

Referring to fig. 2, 5 and 6, in some embodiments, the housing 100 has an outer surface 110 and an inner surface 120, the outer surface 110 of the housing 100 directly contacts the outside, and the inner surface 120 of the housing 100 is used to define the boundary of the inner cavity of the housing 100, and obviously, the outer surface 110 and the inner surface 120 are oriented oppositely. The housing 100 is provided with a limiting hole 130, the limiting hole 130 is a through hole, and the limiting hole 130 simultaneously penetrates through the outer surface 110 and the inner surface 120 of the housing 100. The number of the limiting holes 130 is two, and obviously, the number of the charging assemblies 300 is also two, and one charging assembly 300 is inserted into each limiting hole 130. When one of the charging assemblies 300 abuts against the positive charging terminal in the charging box and the other charging assembly 300 abuts against the negative charging terminal in the charging box, the charging box can charge the earphone 10 through the two charging assemblies 300.

Referring to fig. 2, 5 and 7, in some embodiments, the limiting hole 130 includes a first through hole 131, a second through hole 132 and a stepped hole 133, and the housing 100 includes a boss 140. Both the first through-hole 131 and the second through-hole 132 have a cross-sectional size smaller than that of the stepped hole 133. The boss 140 is located in the inner cavity of the casing 100, the boss 140 is connected to the inner surface 120 of the casing 100, the boss 140 protrudes a certain height relative to the inner surface 120, and the shape of the boss 140 may be substantially rectangular. The first through hole 131 and the second through hole 132 are spaced apart from each other such that the first through hole 131 and the second through hole 132 are respectively disposed at opposite sides of the boss 140. The stepped hole 133 is formed by a portion of the outer surface 110 of the housing 100 being recessed to a predetermined depth toward the inner surface 120, and the stepped hole 133 may be a substantially curved racetrack-shaped hole, but the stepped hole 133 may also be an elliptical hole or other regular polygonal hole. The first through hole 131 is substantially a rectangular hole, but the first through hole 131 may also be an elliptical hole or other regular polygonal holes. The second through hole 132 is also a substantially rectangular hole, but the second through hole 132 may also be an elliptical hole or other regular polygonal holes.

The first through-hole 131 is formed by a portion of the bottom wall surface 133a of the stepped hole 133 being recessed, and the first through-hole 131 penetrates the inner surface 120 of the case 100, so that the first through-hole 131 communicates with both the stepped hole 133 and the inner cavity of the case 100. Likewise, the second through-hole 132 is formed by recessing another portion of the bottom wall surface 133a of the stepped hole 133, and the second through-hole 132 penetrates the inner surface 120 of the housing 100, so that the second through-hole 132 communicates both the stepped hole 133 and the inner cavity of the housing 100.

Referring to fig. 1, 3 and 8, in some embodiments, the first resilient plate 301 includes a first connecting piece 310, a second connecting piece 320 and a contact piece 330. The contact piece 330 is adapted to the shape of the stepped hole 133 so that the contact piece 330 can be adapted to the stepped hole 133. The contact piece 330 has a contact surface 331 and a mounting surface 332, the contact surface 331 directly contacts with the outside, the contact surface 331 and the mounting surface 332 are oriented in the opposite direction, and the contact surface 331 may be a flat surface or a curved surface. When the contact piece 330 is fitted to the stepped hole 133, the contact surface 331 is brought into smooth abutment with both the exterior surfaces 110 of the housing 100. For example, the tangent planes of the contact surface 331 and the appearance surface 110 at the interface coincide with each other, in colloquial terms, such that the contact surface 331 and the appearance surface 110 are "flush" with each other. In fact, the outer surface of the whole earphone 10 includes the contact surface 331 of the contact piece 330 and the outer surface 110 of the casing 100, and when the contact surface 331 and the outer surface 110 are smoothly butted, the uneven structure on the outer surface of the whole earphone 10 can be eliminated, so that the outer surface of the whole earphone 10 is smoothly transited everywhere, the defects that the outer surface of the earphone 10 is concave or convex due to the fact that the contact surface 331 and the outer surface 110 cannot be flush are avoided, the outer surface of the earphone 10 forms a muddy integral visual feeling, and the integrity of the outer surface of the earphone 10 is well ensured. Dust is effectively prevented from being accumulated at the concave or convex portions, poor contact between the charging assembly 300 and the charging terminal due to covering of the dust is avoided, and thus the charging stability of the whole earphone 10 is improved.

Referring to fig. 4, 5 and 8, the first connecting piece 310 includes a first connecting section 311 and a second connecting section 312, one end of the first connecting section 311 is connected to the mounting surface 332 of the contact piece 330, and the other end of the first connecting section 311 is connected to the second connecting section 312 in a bent manner, so that the first connecting section 311 is connected to the second connecting section 312 at an included angle, for example, the first connecting section 311 and the second connecting section 312 may be perpendicular to each other. The first connecting section 311 is inserted into the first through hole 131. The second connecting section 312 abuts between the second elastic sheet 302 and the boss 140, when the second elastic sheet 302 exerts abutting force on the second connecting section 312, the second connecting section 312 can be clamped between the boss 140 and the second elastic sheet 302, obviously, the mounting stability of the whole first elastic sheet 301 can be improved to a certain extent through the abutting and limiting effects of the boss 140 and the second connecting section 312, and the whole first elastic sheet 301 is prevented from being withdrawn from the limiting hole 130 under the abutting force of the second elastic sheet 302. In fact, the second connecting section 312 has two surfaces facing opposite directions, one of the surfaces is denoted as a first abutting surface 312a, the first abutting surface 312a is disposed toward the second spring plate 302, the first abutting surface 312a directly contacts with the second spring plate 302 to form an abutting relationship, and the other surface directly abuts against the boss 140 to abut against the surface of the boss 140. Meanwhile, the first connecting section 311 can also be tightly attached to the boss 140, so that the whole first connecting piece 310 has a certain coating effect on the boss 140, and the mounting stability of the first elastic piece 301 is further improved.

The second connecting piece 320 is fixedly connected to the mounting surface 332 of the contact piece 330 such that the second connecting piece 320 is located on the same side of the entire contact piece 330 as the first connecting piece 310, and the first connecting piece 310 and the second connecting piece 320 are spaced apart from each other. The second connecting piece 320 may be bent such that a portion of the second connecting piece 320 is inserted into the first through hole 131 and another portion of the second connecting piece 320 abuts against the inner surface 120 of the casing 100. Through the abutting relation between the second connecting piece 320 and the inner surface 120, the interference between the first elastic piece 301 and the shell 100 can be further increased, the whole first elastic piece 301 is prevented from being withdrawn from the limiting hole 130 under the abutting force of the second elastic piece 302, and the mounting stability of the whole first elastic piece 301 is further improved.

Referring to fig. 3, 4 and 9, in some embodiments, the second resilient tab 302 includes a fixing tab 340 and an abutting tab 350, and the fixing tab 340 is fixed on the current board by means of a patch welding. The abutting piece 350 is elastically connected to the fixing piece 340, and the abutting piece 350 is connected to the fixing piece 340 to form a certain included angle. The abutting piece 350 is configured to abut against the second connecting section 312 of the first elastic piece 301, the abutting piece 350 has a second abutting surface 351, the second abutting surface 351 may be a circular arc curved surface, and the second abutting surface 351 is disposed toward the first elastic piece 301. As for the first abutting surface 312a on the second connecting section 312, the first abutting surface 312a may be a plane, the area of the first abutting surface 312a may be larger than the area of the second abutting surface 351, and when the first resilient tab 301 and the second resilient tab 302 abut against each other, the first abutting surface 312a and the second abutting surface 351 contact each other. Because the first abutting surface 312a is a plane and the area is larger than the second abutting surface 351 which is a circular arc curved surface, in the process of abutting the first elastic sheet 301 and the second elastic sheet 302, the second abutting surface 351 which is a circular arc curved surface can smoothly slide relative to the first abutting surface 312a which is a plane, so that the frictional resistance between the first elastic sheet 301 and the second elastic sheet 302 is reduced, and the abutting positions can be smoothly found by the first elastic sheet 301 and the second elastic sheet 302. Meanwhile, the area of the first abutting surface 312a is relatively large, so that a sufficient space can be provided for the contact between the first abutting surface 312a and the second abutting surface 351, the second abutting surface 351 is prevented from being unable to contact with the first abutting surface 312a, a stable elastic force is ensured to exist between the first elastic sheet 301 and the second elastic sheet 302, and finally, the stability of the conduction of the whole charging assembly 300 is improved.

If the charging assembly 300 employs a copper post that mates with a circular hole in the housing 100, typically, the end surface of the copper post is not designed to be "flush" with the exterior surface 110. Even if make the terminal surface of copper post and the outward appearance face 110 parallel and level of casing 100 in the design, however, in the welding process of copper post and circuit board 200, the copper post can produce the rotation and lead to installation error relative to the round hole to change the position of copper post terminal surface, including casing 100's outward appearance face 110 is the curved surface usually, make the terminal surface of this copper post after the installation accomplish unable and the parallel and level of outward appearance face 110.

For the first elastic sheet 301 in the above embodiment, when the first elastic sheet 301 is inserted into the whole position-limiting hole 130 and is engaged with the position-limiting hole 130, the contact sheet 330 is engaged with the stepped hole 133, the first connecting sheet 310 is inserted into the first through hole 131, and the second connecting sheet 320 is inserted into the second through hole 132, so that the first elastic sheet 301 can be effectively prevented from rotating relative to the position-limiting hole 130 to change the installation position by the position-limiting action of the position-limiting hole 130, so that the installation position of the first elastic sheet relative to the position-limiting hole 130 is determined, and the installation position of the contact surface 331 is further determined, and finally the contact sheet 330 is ensured to be kept in a "flush" relationship with the appearance surface 110 of the housing 100 at the determined installation position. On the one hand, the uneven structure on the outer surface of the earphone 10 can be prevented, the visual perception of the whole body formed on the outer surface of the earphone 10 is ensured, and the integrity of the outer surface of the earphone 10 is improved. On the other hand, dust can be prevented from being accumulated on the uneven structure, the contact surface 331 can be ensured to be in good contact with the charging terminal, the contact between the contact surface 331 and the charging terminal is ensured, the charging component 300 has good conductive performance, and the charging stability of the earphone 10 is improved. In addition, the contact surface 331 has a relatively large area, which can provide enough space for the contact of the charging terminal, so as to ensure that the charging terminal can always form a contact relation with the contact surface 331, and improve the stability of the conduction of the whole charging assembly 300.

In some embodiments, the earphone 10 further includes an adhesive layer, the adhesive layer is located in the limiting hole 130, the adhesive layer is connected between the casing 100 and the charging assembly 300, and the adhesive layer is used for sealing a gap between the casing 100 and the charging assembly 300. Specifically, glue may be poured into the stopper hole 130, for example, the glue may flow into the stepped hole 133 to be filled in the gap between the contact piece 330 and the housing 100, the glue may also flow into the first through hole 131 to be filled in the gap between the first connection piece 310 and the housing 100, and the glue may also flow into the second through hole 132 to be filled in the gap between the second connection piece 320 and the housing 100. Therefore, after glue is solidified to form the glue joint layer, on the one hand, the glue joint layer can play a good sealing effect for the gap, so that external liquid drops and dust are prevented from entering the shell 100 through the gap, erosion of the liquid drops and the dust on parts such as the circuit board 200 of the shell 100 is avoided, and the service life of the whole earphone 10 is prolonged. On the other hand, the adhesive layer can fix the first elastic sheet 301 on the housing 100, so that the installation stability of the first elastic sheet 301 is improved, and the first elastic sheet 301 is prevented from shaking relative to the housing 100, so that the first elastic sheet 301, the second elastic sheet 302 and the charging terminal are in good contact with each other, and the conductive stability of the whole charging assembly 300 is ensured.

The second elastic sheet 302 is fixed on the circuit board 200, and the first elastic sheet 301 is abutted against the second elastic sheet 302, so that the first elastic sheet 301 and the second elastic sheet 302 are prevented from forming an integrally formed connecting structure. On one hand, the assembling difficulty of the charging assembly 300 can be reduced, and the assembling efficiency of the earphone 10 can be improved. On the other hand, the design and processing difficulty of the first elastic sheet 301 can be reduced, and the second elastic sheet 302 can be directly selected from standard parts, so that the manufacturing cost of the charging assembly 300 and the whole earphone 10 can be reduced, and the market competitiveness of the earphone 10 can be improved.

Referring to fig. 2, in some embodiments, the housing 100 includes a front shell 101 and a rear shell 102, the limiting hole 130 is disposed on the front shell 101, and the front shell 101 and the rear shell 102 are fixed by a detachable connection. For example, the front case 101 and the rear case 102 may be fixed by a screw connection or a snap connection, etc. Since the front case 101 and the rear case 102 are fixed by means of detachable connection, when the parts in the whole casing 100 need maintenance due to malfunction, the front case 101 and the rear case 102 can be quickly detached.

Referring to fig. 10, the present invention further provides an assembling method, which can assemble the earphone 10, and the assembling method mainly includes the following steps:

s410, in a first step, the first elastic sheet 301 is inserted into the limiting hole 130 of the housing 100. And S420, fixing the second elastic sheet 302 on the circuit board 200 in a patch welding mode. The order of the first step and the second step can be interchanged. S430, in a third step, the circuit board 200 fixed with the second elastic sheet 302 is accommodated in the inner cavity of the housing 100, and the first connecting sheet 310 on the first elastic sheet 301 is bent, so that the first connecting sheet 310 includes the first connecting section 311 and the second connecting section 312 which are connected in a bent manner, and the first abutting surface 312a of the second connecting section 312 abuts against the second abutting surface 351 of the second elastic sheet 302, at this time, the second connecting section 312 is sandwiched between the boss 140 and the second elastic sheet 302, the boss 140 plays a good role in limiting the second connecting section 312, thereby ensuring that a reliable abutting relationship is formed between the second connecting section 312 and the second elastic sheet 302, and improving the conductive stability of the charging assembly 300. S440, the fourth step, pour into a certain amount of glue through the mode of point glue in spacing hole 130, after glue solidifies and forms the cementing layer, the cementing layer will be filled among the gap between first shell fragment 301 and casing 100, thereby play fine sealed effect to spacing hole 130, prevent that external dust and liquid from getting into casing 100 inside through spacing hole 130 and constituting the erosion with parts such as circuit board 200, can make first shell fragment 301 snap-on casing 100 simultaneously, improve the reliability of first shell fragment 301 installation.

Through the assembling method, the second elastic sheet 302 can be stably and reliably fixed on the circuit board 200, the first elastic sheet 301 is also stably and reliably connected with the shell 100, and a reliable abutting relation is formed between the second elastic sheet 302 and the first elastic sheet 301, so that stable electrical connection between the second elastic sheet 302 and the first elastic sheet 301 is realized, the conductive stability of the charging assembly 300 is ensured, and compared with the prior art, the assembling method has the advantages that welding connection is not needed, and the assembling efficiency is high. Meanwhile, the adhesive layer is filled in the gap between the first elastic sheet 301 and the casing 100, so that the erosion of external dust and liquid to the parts inside the casing 100 can be prevented, and the service life of the whole earphone 10 is prolonged.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An earphone, comprising:

the shell is provided with an appearance surface, and the shell is provided with a limiting hole penetrating through the appearance surface;

a circuit board disposed within the housing, an

The charging assembly is electrically connected with the circuit board and is provided with a contact surface used for being abutted against external charging equipment, the limiting hole is matched with the charging assembly to limit the mounting position of the charging assembly, and the contact surface is smoothly butted with the appearance surface.

2. The earphone according to claim 1, wherein the charging assembly comprises a first spring plate and a second spring plate, the first spring plate is arranged in the limiting hole in a penetrating mode, the second spring plate is fixed on the circuit board, and the first spring plate and the second spring plate are mutually abutted.

3. The earphone according to claim 2, wherein the case has an inner surface facing opposite to the outer surface, the stopper hole includes a stepped hole and a first through-hole communicating with each other, the stepped hole is formed by a depression of the outer surface, and the first through-hole is formed by a depression of a bottom wall surface of the stepped hole and penetrates the inner surface; the first elastic sheet comprises a contact sheet and a first connecting sheet, the contact surface is arranged on the contact sheet, one end of the first connecting sheet is fixed on the surface, opposite to the contact surface, of the contact sheet, the contact sheet is matched with the stepped hole, and the first connecting sheet penetrates through the first through hole and is abutted against the second elastic sheet.

4. The earphone according to claim 3, wherein the housing comprises a boss, the boss is connected with the inner surface and protrudes relative to the inner surface, the first connecting piece comprises a first connecting section and a second connecting section, one end of the first connecting section is fixed on the contact piece, the second connecting section is connected with the other end of the first connecting section in a bending mode, and the second connecting section abuts against between the boss and the second elastic piece.

5. The earphone according to claim 3, wherein the limiting hole further comprises a second through hole spaced from the first through hole, the second through hole is formed by recessing the bottom wall surface of the stepped hole and penetrates through the inner surface, the first elastic piece further comprises a second connecting piece spaced from the first connecting piece, the second connecting piece is fixed on the surface of the contact piece opposite to the contact surface, and a part of the second connecting piece is attached to the inner surface and abuts against the shell.

6. The earphone according to claim 2, wherein the second elastic piece comprises a fixing piece and a butting piece, the butting piece is connected with the fixing piece at an included angle, the fixing piece is fixedly arranged on the circuit board, and the butting piece is elastically connected with the fixing piece and butted with the first elastic piece.

7. The earphone according to claim 2, wherein the first resilient piece has a first abutting surface facing the second resilient piece, the second resilient piece has a second abutting surface facing the first resilient piece, the first abutting surface and the second abutting surface abut against each other, the first abutting surface is a plane, the second abutting surface is a circular arc curved surface, and the area of the first abutting surface is larger than that of the second abutting surface.

8. The earphone of claim 1, further comprising a glue layer located in the limiting hole, wherein the glue layer is connected between the casing and the charging assembly, and the glue layer is used for sealing a gap between the casing and the charging assembly.

9. The headset of claim 1, wherein the contact surface is curved or planar.

10. An assembly method, comprising the steps of:

the first elastic sheet is arranged in the limiting hole of the shell in a penetrating mode;

fixing the second elastic sheet on the circuit board;

the circuit board fixed with the second elastic sheet is accommodated in the shell, and the first connecting sheet on the first elastic sheet is bent so that the first elastic sheet abuts against between the shell and the second elastic sheet; and

and pouring glue into the limiting hole so that the glue is solidified into a glue joint layer sealed in a gap between the shell and the first elastic sheet.

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