阅读说明：本技术 一种头戴式耳机 (Head-wearing earphone ) 是由 刘汉兵 于 2021-08-20 设计创作，主要内容包括：本发明涉及一种头戴式耳机,包括沿头部弧形设计的头带以及装配在头带两端的耳机壳,头带与耳机壳通过连接件可相对伸缩地装配连接,头带内含套管、电线和钢件,电线的端部和钢件的端部均从套管的两端伸出,电线穿过连接件与耳机壳内的电路元件电性连接,连接件包括装配于头带两端的抽拉件、装配在耳机壳的支臂、支臂转轴以及转轴固定件,抽拉件可伸缩地插装在支臂内,支臂通过支臂转轴可旋转地装配在转轴固定件上,转轴固定件与耳机壳装配固定。本发明的结构简单而结构稳定性和可靠性强。(The invention relates to a head-wearing earphone, which comprises a head band designed along the arc shape of the head and earphone shells assembled at the two ends of the head band, wherein the head band and the earphone shells can be assembled and connected in a relatively telescopic manner through a connecting piece, the head band comprises a sleeve, an electric wire and a steel piece, the end part of the electric wire and the end part of the steel piece both extend out from the two ends of the sleeve, the electric wire passes through the connecting piece to be electrically connected with a circuit element in the earphone shells, the connecting piece comprises a pulling piece assembled at the two ends of the head band, a support arm assembled on the earphone shells, a support arm rotating shaft and a rotating shaft fixing piece, the pulling piece is telescopically inserted in the support arm, the support arm is rotatably assembled on the rotating shaft fixing piece through the support arm rotating shaft, and the rotating shaft fixing piece is assembled and fixed with the earphone shells. The invention has simple structure and strong structural stability and reliability.)

1. A headset comprises a headband (1) and headset shells (2) assembled at two ends of the headband (1), wherein the headband (1) and the headset shells (2) are assembled and connected in a relatively telescopic manner through connecting pieces, the headband (1) internally comprises a sleeve (3), an electric wire (4) and a steel piece (5), the end part of the electric wire (4) and the end part of the steel piece (5) both extend out of two ends of the sleeve (3), the electric wire (4) penetrates through the connecting pieces to be electrically connected with circuit elements in the headset shells (2), the connecting pieces comprise pull pieces (6) assembled at two ends of the headband (1) and support arms (7) assembled in the headset shells (2), and the pull pieces (6) are telescopically inserted into the support arms (7); it is characterized in that the preparation method is characterized in that,

the drawing piece (6) comprises a drawing piece upper cover (13) and a drawing piece lower cover (14) which are mutually covered, the inner end of the drawing piece lower cover (14) is provided with a first trepan boring (15), the inner end of the drawing piece upper cover (13) is provided with a first inserting part (16) 16, the inner end of the drawing piece upper cover (13) and the inner end of the drawing piece lower cover (14) are inserted into the first trepan boring (15) through the first inserting part (16) for limiting, the outer surface of the drawing piece upper cover (13) is provided with a corrugated groove (18) which is configured along the stretching direction and consists of a plurality of groove bodies (17), the support arm (7) comprises a support arm upper cover (23) and a support arm lower cover (24) which are mutually covered, the inner end of the support arm lower cover (24) is provided with a second trepan boring (25), and the support arm lower cover (24) is sleeved on the periphery of the drawing piece (6) through the second trepan boring (25), the inner end of the support arm upper cover (23) is provided with a second inserting part (27), the inner end of the support arm upper cover (23) and the inner end of the support arm lower cover (24) are inserted between the second trepanning (25) and the inner end of the pull-out piece lower cover (14) through the second inserting part (27) for limiting, and the inner surface of the support arm upper cover (23) is provided with an elastic tongue (28) matched with the corrugated groove (18);

when the telescopic headband is used, the headband (1) is pulled, the steel piece (5) in the headband (1) drives the drawing piece (6) to upwards slide in the support arm (7), so that the elastic tongue (28) slides into the other groove body (17) below from one groove body (17) in the corrugated groove (18), and the headband (1) is stretched.

2. A headphone as claimed in claim 1, characterized in that the sleeve (3) has a hollow through-hole extending in the direction of the long axis, the wire (4) and the steel member (5) being inserted through the through-hole at one end opening of the sleeve (3) and coming out through the other end opening of the sleeve (3).

3. A headphone as claimed in claim 2, characterized in that said perforations comprise a first perforation (11) housing said steel element (5) and a second perforation (12) housing said electric wire (4).

4. A headset according to claim 1, characterized in that the wires (4) extend out of the headband (1) at both ends with spring wire sections (29), or the wires (4) are spring wires in their entirety.

5. Headset according to claim 1, characterized in that the lower drawer cover (14) is provided with a sliding groove (30) extending in the telescopic direction, the upper drawer cover (13) is provided with a sliding block (31) extending in the long axis direction, and the upper drawer cover (13) is inserted into the sliding groove (30) through the sliding block (31) and slides for assembly with the lower drawer cover (14).

6. Headset according to claim 5, characterized in that the sliding groove (30) is located on both inner side walls of the lower drawer cover (14) and the slider (31) is located on both outer side walls of the upper drawer cover (13), wherein the outer side walls of the upper drawer cover (13) are located inside the lower drawer cover (14) and between the inner side walls when assembled.

7. The headphone as claimed in claim 1, wherein the outer end of the arm cover (24) has a third hole (32), a rotation shaft of the arm (7) penetrates from the inner side to the outer side of the third hole (32), and the rotation shaft of the arm (7) is rotatably fitted in the third hole (32), the inner end of the rotation shaft of the arm (7) is provided with a first retaining portion (35) and the outer end is provided with a second retaining portion (36), the first retaining portion (35) is used for preventing the rotation shaft of the arm (7) from coming out of the outer side of the third hole (32); the rotating shaft fixing piece (9) comprises a rotating shaft fixing piece lower cover (37) and a rotating shaft fixing piece upper cover (38) which are mutually covered, a fourth trepan boring (39) is formed in the inner end of the rotating shaft fixing piece (9), the outer end of the rotating shaft of the support arm (7) penetrates through the fourth trepan boring (39) from the outer side and is inserted into the inner end of the rotating shaft fixing piece (9), a limiting part (40) is formed in the inner end of the rotating shaft fixing piece upper cover (38), the limiting part (40) is matched with the second anti-falling part (36) to prevent the rotating shaft of the support arm (7) from falling out of the fourth trepan boring (39), and the rotating shaft fixing piece upper cover (38) is fixedly assembled with the earphone shell (2); the end part of the wire (4) penetrates through the rotating shaft of the support arm (7) and is electrically connected with a circuit element in the earphone shell (2) through the rotating shaft fixing piece upper cover (38).

8. Headset according to claim 1, characterized in that the inner bottom surface of the lower arm cover (24) is provided with a rib (44) extending in the telescopic direction, which rib (44) serves as a first telescopic contact surface between the lower arm cover (24) and the drawer lower cover (14).

9. Headset according to claim 1 or 8, characterized in that the outer end of the pull-out cover (13) has a third anti-release (45) and the inner end of the arm cover (23) has a fourth anti-release (46), and that, in use, pulling on the headband (1), the fourth anti-release (46) of the arm (7) blocks the third anti-release (45) of the pull-out (6) in order to prevent the pull-out (6) from coming out of the arm (7) in the telescopic direction.

10. Headset according to claim 9, characterized in that the outer end of the drawer cover (13) has a stand-off (47), which stand-off (47) is intended to cooperate with the spring tongue (28) as a second telescopic interface between the arm cover (23) and the drawer cover (13).

Technical Field

The invention relates to the technical field of earphones, in particular to a headset.

Background

At present, the bandeau structure of headphone is the integrative injection moulding structure who adopts billet and gum cover basically, and the electric wire is then laid on the surface of gum cover, and the exposure of electric wire can seem that the earphone is whole comparatively in disorder, also breaks because of pulling of foreign matter easily, so the bandeau life of this kind of structure is shorter to assembly structure is also comparatively more troublesome, consuming time power, and production efficiency is lower.

Among the prior art, chinese utility model patent with publication number CN203181184U discloses a headphone, including bandeau, the earphone shell of setting at the bandeau both ends, the bandeau is including having porose outer tube, bandeau line and steel part, and the bandeau line passes the hole of outer tube with the steel part to be connected with the earphone shell at bandeau both ends, the bandeau passes through the scalable regulation ground of latch fitting with the earphone shell and is connected. The headset is simple in structure, light in weight and space-saving. However, the stability and reliability of the assembly structure between the headband and the earphone case in the related art are relatively poor and need to be improved.

Disclosure of Invention

The present invention provides a headset, which is designed to overcome the above-mentioned shortcomings in the prior art.

The embodiment of the invention provides a headset, which comprises a head band and headset shells assembled at two ends of the head band, wherein the head band and the headset shells can be assembled and connected in a relatively telescopic manner through a connecting piece; the outer surface of the upper cover of the pull-out part is provided with a corrugated groove which is configured along the extension direction and consists of a support arm upper cover and a support arm lower cover which are mutually covered, the inner end of the support arm lower cover is provided with a second sleeve hole, the support arm lower cover is sleeved on the periphery of the pull-out part through the second sleeve hole, the inner end of the support arm upper cover and the inner end of the support arm lower cover are inserted between the second sleeve hole and the inner end of the lower cover of the pull-out part through the second insertion part to limit, and the inner surface of the support arm upper cover is provided with an elastic tongue matched with the corrugated groove; when the headband is used, the headband is pulled, the steel piece in the headband drives the pulling piece to slide upwards in the support arm, so that the elastic tongue slides into the other groove body below from one groove body in the corrugated groove, and the headband is stretched. The telescopic assembly structure of the pull piece and the support arm is simple, stability and reliability are high, the first trepanning is matched with the first inserting portion 16, the second trepanning is matched with the second inserting portion, the pull piece and the support arm are assembled in place tightly, and sliding type telescopic operation which is smooth is achieved through the matching of the elastic tongue and the corrugated groove.

In some of these embodiments, the sleeve has a hollow bore extending in the direction of the long axis, and the wire and steel member are inserted through the bore at one end opening of the sleeve and out through the other end opening of the sleeve. In the embodiment, by improving the combination mode of the sleeve, the electric wire and the steel piece, the assembly mode that the electric wire and the steel piece are directly penetrated in the sleeve is adopted, the step of integral injection molding is omitted, the electric wire does not need to be exposed, the situation of being broken is avoided, the durability of the head band is improved, and the production cost is reduced.

In some of these embodiments, the perforations include a first perforation that receives the steel piece and a second perforation that receives the wire. This embodiment is through improving the poling structure of steel part and electric wire, wears to establish electric wire and steel part respectively in the perforation of predetermineeing, and avoids mutual interference between the two, has improved the reliability when the headband uses.

In some of these embodiments, the wires extend out of both ends of the headband with spring wire segments, or the wires are entirely spring wire segments. This embodiment makes the electric wire have better flexible performance through the spring wire to cooperation bandeau and the flexible regulatory function between the earphone shell, avoided among the prior art to adopt the electric wire defect of being torn easily that the mode of long straight line leads to for reserving flexible length.

In some embodiments, the lower cover of the drawer is provided with a sliding groove extending along the telescopic direction, the upper cover of the drawer is provided with a sliding block extending along the telescopic direction, and the upper cover of the drawer is embedded into the sliding groove through the sliding block and slides to be assembled with the lower cover of the drawer. The assembly of the lower cover of the drawer and the upper cover of the drawer along the telescopic direction is realized through the matching of the sliding groove and the sliding block, and the assembly structure is simple and the reliability is high.

In some embodiments, the sliding grooves are located on two inner side walls of the drawer lower cover, the sliding blocks are located on two outer side walls of the drawer upper cover, and when the drawer upper cover is assembled, the two outer side walls of the drawer upper cover are arranged in the drawer lower cover and located between the two inner side walls. This embodiment sets up on the lateral wall of pull through the position with spout and slider, and spout and slider have all formed the knot position on other directions except along the flexible direction, prevent effectively that pull lower cover and pull upper cover from opening in other directions atress that are different from flexible direction, have higher reliability.

In some embodiments, the outer end of the lower arm cover has a third sleeve hole, a rotating arm shaft penetrates from the inner side to the outer side of the third sleeve hole, and the rotating arm shaft is rotatably assembled in the third sleeve hole, the inner end of the rotating arm shaft is provided with a first anti-falling part, and the outer end of the rotating arm shaft is provided with a second anti-falling part, the first anti-falling part is used for preventing the rotating arm shaft from falling out of the outer side of the third sleeve hole; the rotating shaft fixing piece comprises a rotating shaft fixing piece lower cover and a rotating shaft fixing piece upper cover which are mutually covered, a fourth sleeve hole is formed in the inner end of the rotating shaft fixing piece, the outer end of the support arm rotating shaft penetrates through the fourth sleeve hole from the outer side and is inserted into the inner end of the rotating shaft fixing piece, a limiting part is arranged in the inner end of the rotating shaft fixing piece upper cover and is matched with the second anti-falling part to prevent the support arm rotating shaft from falling off from the outer side of the fourth sleeve hole, and the rotating shaft fixing piece upper cover is assembled and fixed with the earphone shell; the end of the wire passes through the support arm rotating shaft and is electrically connected with the circuit element in the earphone shell through the rotating shaft fixing piece upper cover. This embodiment scheme passes through the switching of support arm pivot as support arm and pivot mounting to realize the rotation of earphone shell with the support arm pivot, be applicable to different user's head shapes, make the user wear more comfortablely.

In some embodiments, the inner bottom surface of the support arm lower cover is provided with a rib extending along the telescopic direction, and the rib is used as a first telescopic contact surface between the support arm lower cover and the drawer lower cover. This embodiment passes through the rib as first flexible contact surface, when providing the support, reduces the contact surface between support arm and the pull, produced friction when reducing the flexible between pull and the support arm guarantees flexible smooth and easy degree.

In some embodiments, the outer end of the upper cover of the drawer has a third anti-disengaging portion, the inner end of the upper cover of the support arm has a fourth anti-disengaging portion, and when the headband is pulled in use, the fourth anti-disengaging portion of the support arm blocks the third anti-disengaging portion of the drawer to prevent the drawer from disengaging from the support arm along the extending direction. The embodiment realizes the telescopic anti-falling between the drawing piece and the support arm by arranging the third anti-falling part and the fourth anti-falling part, and improves the reliability of the telescopic structure.

In some of the embodiments, the outer end of the upper cover of the drawer is provided with a standing part which is used as a second telescopic contact surface of the upper cover of the support arm and the upper cover of the drawer together with the spring tongue. This embodiment is through propping up portion and bullet tongue as the flexible contact surface of second, when providing the support, reduces the contact surface between support arm and the pull, produced friction when reducing the flexible between pull and the support arm, guarantees flexible smooth and easy degree to can with first flexible contact surface combined action.

The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the invention.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is an overall assembly structure view of a headphone according to an embodiment of the present invention.

Fig. 2 is a partial composition structural view of a headphone according to an embodiment of the present invention.

Fig. 3 is an overall exploded structural view of the headphone according to the embodiment of the present invention.

Fig. 4 is an enlarged structural view of a portion a in fig. 3.

Fig. 5 is an enlarged structural view of a portion B in fig. 3.

Fig. 6 is an enlarged structural view of a portion C in fig. 3.

Fig. 7 is an enlarged structural view of a portion D in fig. 3.

In the figure, 1, a headband; 2. an earphone shell; 3. a sleeve; 4. an electric wire; 5. a steel part; 6. a drawer; 7. a support arm; 8. a support arm rotating shaft; 9. a rotating shaft fixing member; 10. a microphone rod; 11. a first perforation; 12. a second perforation; 13. a drawer upper cover; 14. a drawer lower cover; 15. a first trepan boring; 16. a first insertion portion; 17. a trough body; 18. a corrugated groove; 19. a positioning column; 20. positioning holes; 21. a lower support block; 22. an upper support block; 23. an upper cover of the support arm; 24. a lower cover of the support arm; 25. a second trepan boring; 26. a convex ring; 27. a second insertion portion; 28. a spring tongue; 29. a spring wire segment; 30. a chute; 31. a slider; 32. a third set of holes; 33. a first limit groove; 34. a first stopper; 35. a first anti-drop part; 36. a second anti-drop part; 37. a lower cover of the rotating shaft fixing piece; 38. a rotating shaft fixing piece upper cover; 39. a fourth trepan boring; 40. a limiting part; 41. a second limiting block; 42. a second limit groove; 43. a third limiting groove; 44. ribs; 45. a third detachment prevention portion; 46. a fourth drop prevention section; 47. a support part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments provided by the present invention, belong to the protection scope of the present invention. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one of ordinary skill in the art that the described embodiments of the present invention can be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" and "an" and "the" and similar referents in the context of describing the invention are not to be construed as limiting in number, and may be construed to cover both the singular and the plural. The present invention relates to the terms "comprises," "comprising," "includes," "including," "has," "having" and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in the description of the invention are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The terms "first," "second," "third," and the like in reference to the present invention are used merely to distinguish between similar objects and not necessarily to represent a particular ordering for the objects.

As shown in fig. 1 to 7, in order to improve the stability and reliability of the assembly structure between the headband 1 and the earphone shells 2 in the headset, the headset provided in this embodiment includes the headband 1 designed along the arc shape of the head and the earphone shells 2 assembled at the two ends of the headband 1, the headband 1 and the earphone shells 2 are assembled and connected in a relatively telescopic manner through a connecting piece, the headband 1 includes a sleeve 3, an electric wire 4 and a steel piece 5, the end of the electric wire 4 and the end of the steel piece 5 both extend out from the two ends of the sleeve 3, the electric wire 4 passes through the connecting piece to be electrically connected with the circuit elements in the earphone shells 2, the connecting piece includes a pulling piece 6 assembled at the two ends of the headband 1, support arm 7, support arm 7 pivot and pivot mounting 9, pull 6 telescopically cartridge in support arm 7, support arm 7 passes through support arm 7 pivot rotatably to assemble on pivot mounting 9, pivot mounting 9 and earphone shell 2 assembly are fixed. A microphone rod 10 is disposed on one of the rotation shaft fixing members 9, the microphone rod 10 is used for providing a telephone traffic communication function, and an end of the microphone rod 10 is rotatably mounted on the rotation shaft fixing member 9. From the structure, the whole composition structure is simple.

In order to improve the durability of the headband 1 and reduce the production cost, in the present embodiment, the sleeve 3 has a hollow penetration hole extending in the long axis direction, and the electric wire 4 and the steel member 5 are inserted through the penetration hole at one end opening of the sleeve 3 and come out through the other end opening of the sleeve 3. In the embodiment, by improving the combination mode of the sleeve 3, the electric wire 4 and the steel piece 5 and adopting the assembly mode that the electric wire 4 and the steel piece 5 are directly penetrated in the sleeve 3, the step of integral injection molding is omitted, and the electric wire 4 can be prevented from being exposed and broken.

In order to further improve the reliability of the headband 1 in use, in the embodiment, the through holes include a first through hole 11 for accommodating the steel member 5 and a second through hole 12 for accommodating the electric wire 4, as shown in the figure, the cross section of the first through hole 11 is a flat rectangular hole matching with the shape of the steel member 5, the cross section of the second through hole 12 is a semicircular hole, the first through hole 11 is communicated with the second through hole 12, and the first through hole 11 is communicated with the second through hole 12, so that the first through hole 11 is communicated with the second through hole 12 when the electric wire 4 is inserted, the inner hole space can be easily penetrated, and when the steel member 5 is inserted, the first through hole 11 can be easily extruded and expanded towards the second through hole 12 due to the fact that the sleeve 3 is made of plastic material and has deformation capacity, so that the difficulty of inserting the steel member 5 is reduced; it is of course also possible to insert the steel member 5 and the electric wire 4 together after they are bound. In the embodiment, the electric wire 4 and the steel piece 5 are respectively arranged in the preset through holes by improving the pipe penetrating structures of the steel piece 5 and the electric wire 4, so that mutual interference between the electric wire 4 and the steel piece 5 is avoided.

In this embodiment, the drawer 6 includes a drawer upper cover 13 and a drawer lower cover 14 that are covered with each other, the inner end of the drawer lower cover 14 (i.e. the end close to the headband 1) has a first sleeve hole 15, the inner end of the drawer upper cover 13 has a first inserting portion 16, the inner end of the drawer upper cover 13 and the inner end of the drawer lower cover 14 are inserted into the first sleeve hole 15 through the first inserting portion 16 for limitation, and the outer surface of the drawer upper cover 13 has a corrugated groove 18 that is configured along the extending direction and is composed of a plurality of groove bodies 17. After the drawer top 13 and the drawer bottom 14 have been closed, an opening is provided at the outer end of the drawer 6 for the electrical line 4 to pass through. In order to fix the end part of the steel part 5 on the drawer 6, a positioning column 19 is arranged on the inner bottom surface of the lower cover 14 of the drawer, a positioning hole 20 arranged at the end part of the steel part 5 is sleeved on the positioning column 19, a lower supporting block 21 for supporting the steel part 5 is arranged on the inner bottom surface of the lower cover 14 of the drawer, an upper supporting block 22 matched with the lower supporting block 21 is arranged on the inner top surface of the upper cover 13 of the drawer, and the upper supporting block 22 and the lower supporting block 21 jointly act to clamp and fix the steel part 5 (in the state that the upper cover 13 of the drawer and the lower cover 14 of the drawer are fixedly covered), so that the steel part 5 and the drawer 6 are fixedly assembled with each other. Of course, in order to further enhance the assembly firmness between the steel member 5 and the drawer 6, the top surface of the positioning column 19 is configured with an internal screw hole, the steel member 5 is directly fixed on the positioning column 19 by means of screw locking, and the lower support block 21 and the upper support block 22 cooperate to clamp the steel member 5 without loosing the steel member 5. Thus, with the above-described structure, the reliability of the assembly between the steel 5 and the drawer 6 is effectively enhanced.

In this embodiment, the supporting arm 7 includes an upper supporting arm cover 23 and a lower supporting arm cover 24 that are covered with each other, the inner end of the lower supporting arm cover 24 has a second sleeve hole 25, the lower supporting arm cover 24 is sleeved from the outer end of the drawer 6 through the second sleeve hole 25 to be sleeved on the periphery of the drawer 6, in the sleeving process, since the outer periphery of the inner end of the drawer 6 has a convex ring 26 with a larger outer diameter, the lower supporting arm cover 24 is sleeved until the convex ring 26, and the inner end of the upper supporting arm cover 23 has a second inserting portion 27. In order to reduce the assembly difficulty, the lower support arm cover 24 can be smoothly sleeved on the drawer 6 through the second sleeve hole 25, the inner diameter of the second sleeve hole 25 is larger than the outer diameter of the drawer 6 and smaller than the outer diameter of the convex ring 26, so a certain gap can be reserved between the second sleeve hole 25 and the drawer 6, in order to avoid the gap from causing looseness during stretching, and the tightness and reliability of the structure are enhanced, the inner end of the upper support arm cover 23 and the inner end of the lower support arm cover 24 are inserted between the second sleeve hole 25 and the inner end of the lower drawer cover 14 through the second inserting part 27 to limit, and the assembly reliability is improved. The inner surface of the arm upper cover 23 is provided with a spring tongue 28 matched with the corrugated groove 18, the spring tongue 28 is an integral part of the arm upper cover 23, the height of the spring tongue 28 is larger than the depth of the groove body 17, so that the spring tongue 28 is embedded into the groove body 17, the arm upper cover 23 can still keep a distance with the drawer upper cover 13 and can be used as a support for reducing the contact area. The telescopic assembly structure of the drawer 6 and the support arm 7 is simple, the stability and the reliability are high, the first sleeve hole 15 is matched with the first inserting portion 16, the second sleeve hole 25 is matched with the second inserting portion 27, the drawer 6 and the support arm 7 are tightly assembled in place, and the smooth sliding type telescopic operation is realized through the matching of the elastic tongue 28 and the corrugated groove 18.

In this embodiment, the wires 4 extend beyond the headband 1 at both ends with spring wire segments 29, or in another embodiment the wires 4 are spring wires throughout. This embodiment makes electric wire 4 have better flexible performance through the spring wire to the flexible regulatory function between cooperation bandeau 1 and the earphone shell 2 has avoided adopting the defect that long straight line's mode leads to electric wire 4 easily by the tear among the prior art for reserving flexible length.

In this embodiment, the drawer lower cover 14 is provided with a slide groove 30 extending in the telescopic direction, the inner end of the slide groove 30 is closed and the outer end is open, the drawer upper cover 13 is provided with a slider 31 extending in the telescopic direction, and the drawer upper cover 13 is inserted into the slide groove 30 through the outer end opening of the slide groove 30 by the slider 31 and slides to be assembled with the drawer lower cover 14. In the embodiment, the sliding groove 30 and the sliding block 31 are matched to assemble the lower cover 14 and the upper cover 13 of the drawer along the telescopic direction, and the assembly structure is simple and has strong reliability. In order to further enhance the reliability of the assembly of the drawer upper cover 13 and the drawer lower cover 14, the sliding grooves 30 are located on two inner side walls of the drawer lower cover 14, the sliding blocks 31 are located on two outer side walls of the drawer upper cover 13, and during the assembly, the two outer side walls of the drawer upper cover 13 are arranged in the drawer lower cover 14 and located between the two inner side walls. This embodiment sets up on the lateral wall of pull 6 through the position with spout 30 and slider 31, and spout 30 and slider 31 have all formed the knot position in other directions except along the flexible direction, prevent effectively that pull lower cover 14 and pull upper cover 13 from opening in other directions atress that are different from flexible direction, have higher reliability.

In this embodiment, the outer end (the end close to the earphone case 2) of the arm bottom cover 24 has a third hole 32, the rotating shaft of the arm 7 penetrates from the inner side to the outer side of the third hole 32, and the rotating shaft of the arm 7 is rotatably assembled in the third hole 32, a first limiting groove 33 is configured on the inner wall of the third hole 32, the first limiting groove 33 is a fan-shaped groove coaxial with the rotating shaft of the arm 7, a first limiting block 34 is configured on the rotating shaft of the arm 7, and the first limiting block 34 performs a rotation within a specific range within the range limited by the first limiting groove 33, so as to limit the earphone case 2 to have a rotation adjusting function along the rotating shaft of the arm 7 within the specific range. The inner end of the rotation shaft of the arm 7 is provided with a first retaining portion 35 and the outer end is provided with a second retaining portion 36, the first retaining portion 35 is formed such that the outer diameter of the inner end of the rotation shaft of the arm 7 is larger than the inner diameter of the third hole 32, the second retaining portion 36 is formed such that the outer end of the rotation shaft of the arm 7 is protruded in the radial direction, and the first retaining portion 35 prevents the rotation shaft of the arm 7 from coming off from the outer side of the third hole 32.

In this embodiment, the rotation shaft fixing member 9 includes a rotation shaft fixing member lower cover 37 and a rotation shaft fixing member upper cover 38 which are mutually covered, the inner end of the rotation shaft fixing member 9 has a fourth sleeve hole 39, the outer end of the rotation shaft of the support arm 7 passes through the fourth sleeve hole 39 from the outer side and is inserted into the inner end of the rotation shaft fixing member 9, the inner end of the rotation shaft fixing member upper cover 38 has a limiting portion 40, the limiting portion 40 is also a radial protrusion, the limiting portion 40 and the second anti-falling portion 36 are mutually axially buckled and paired to prevent the rotation shaft of the support arm 7 from falling out from the outer side of the fourth sleeve hole 39, and the rotation shaft fixing member upper cover 38 is assembled and fixed with the earphone shell 2; the end of the wire 4 passes through the rotation shaft of the support arm 7 and is electrically connected with the circuit component in the earphone shell 2 through the upper cover 38 of the rotation shaft fixing piece. The scheme of the embodiment uses the rotating shaft of the support arm 7 as the switching connection between the support arm 7 and the rotating shaft fixing part 9, so that the rotation of the earphone shell 2 with the rotating shaft of the support arm 7 is realized, the earphone shell is suitable for different head shapes of users, and the users can wear the earphone shell more comfortably. The rotating shaft of the support arm 7 is further provided with a second limiting block 41, the second limiting block 41 is a radial protrusion, and the second limiting block 41 and a second limiting groove 42 arranged on the inner wall of the fourth sleeve hole 39 arranged on the lower cover 37 of the rotating shaft fixing member are mutually embedded, so as to fix the rotating shaft of the support arm 7 and the rotating shaft fixing member 9. The inner wall of the third hole 32 is provided with a third limiting groove 43 identical to the second limiting groove 42, the third limiting groove 43 is used for guiding and passing the second limiting block 41 when the rotating shaft of the support arm 7 passes through the third hole 32, after the outer end of the rotating shaft of the support arm 7 is sleeved by the fourth hole 39 of the lower cover 37 of the rotating shaft fixing member, the upper cover 38 of the rotating shaft fixing member is covered with the lower cover 37 of the rotating shaft fixing member, and at the same time, the limiting part 40 of the upper cover 38 of the rotating shaft fixing member and the second anti-falling part 36 of the outer end of the rotating shaft of the support arm 7 are clamped along the axial direction of the rotating shaft of the support arm 7, so as to prevent the rotating shaft of the support arm 7 from moving toward the support arm 7 from the rotating shaft fixing member 9, so that the first limiting block 34 is separated from the first limiting groove 33, and the earphone shell 2 cannot realize the rotation adjusting function in a specific range, so that the structure can well improve the structural stability and reliability of the earphone.

In this embodiment, in order to ensure the smooth expansion and contraction, the inner bottom surface of the arm lower cover 24 is provided with a rib 44 extending in the expansion and contraction direction, and the rib 44 serves as a first expansion and contraction contact surface between the arm lower cover 24 and the drawer lower cover 14. In the embodiment, the ribs 44 are used as the first telescopic contact surface to provide support, and simultaneously, the contact surface between the support arm 7 and the drawer 6 is reduced, and the friction generated during the telescopic process between the drawer 6 and the support arm 7 is reduced, so that the telescopic smoothness is ensured.

In this embodiment, in order to improve the reliability of the telescopic structure, the outer end of the drawer upper cover 13 has a third disengagement preventing portion 45, the third disengagement preventing portion 45 is a protrusion on the outer surface of the outer end of the drawer upper cover 13, the inner end of the arm upper cover 23 has a fourth disengagement preventing portion 46, the fourth disengagement preventing portion 46 is a protrusion on the inner surface of the inner end of the arm upper cover 23, and in use, the headband 1 is pulled, and the fourth disengagement preventing portion 46 of the arm 7 blocks the third disengagement preventing portion 45 of the drawer 6, so as to prevent the drawer 6 from disengaging from the arm 7 in the telescopic direction. The present embodiment achieves the prevention of the expansion and contraction between the drawer 6 and the arm 7 by providing the third prevention portion 45 and the fourth prevention portion 46.

In the present exemplary embodiment, the outer end of the drawer cover 13 has a support 47, which support 47 serves, together with the spring tongue 28, as a second telescopic interface between the arm cover 23 and the drawer cover 13. In this embodiment, the supporting portion 47 and the resilient tongue 28 serve as a second telescopic contact surface, so that the contact surface between the supporting arm 7 and the drawer 6 is reduced while supporting is provided, friction generated during the telescopic process between the drawer 6 and the supporting arm 7 is reduced, the smooth degree of telescopic operation is ensured, and the first telescopic contact surface can be used together. Or in another embodiment, the support portion 47 is the aforementioned third prevention portion 45, and the third prevention portion 45 has two functions of preventing from falling off and serving as a second telescopic contact surface, so that the structure of the drawer upper cover 13 is simplified and the structural shape is simplified.

The working principle of the embodiment of the invention is as follows: when the headband 1 is pulled, the steel piece 5 in the headband 1 drives the pull-out piece 6 to slide upwards in the support arm 7, so that the elastic tongue 28 slides into the other groove body 17 below from one groove body 17 in the corrugated grooves 18, and the headband 1 is stretched.

It should be understood by those skilled in the art that various features of the above-described embodiments can be combined in any combination, and for the sake of brevity, all possible combinations of features in the above-described embodiments are not described in detail, but rather, all combinations of features which are not inconsistent with each other should be construed as being within the scope of the present disclosure.

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.