Drawing structure and headphone

Abstract

The embodiment of the utility model discloses a drawing structure and a headphone, the drawing structure is characterized in that a slide way is arranged in a head beam shell, the end part of the head beam shell is provided with a damping block accommodating hole, a sliding arm is provided with a sliding section and a connecting section which are connected in sequence, and the connecting section is arranged in the slide way in a sliding manner; the drawing damping block is at least partially contained in the damping block containing hole and abuts against the side surface of the sliding section so as to provide damping when the sliding section slides along the sliding way, the head beam end cover at least partially covers the damping block containing hole, and the damping block containing hole is provided with an inclined wall hole section. The inclined wall hole section is gradually shrunk from the end close to the sliding arm penetrating hole in the head beam end cover to the end away from the sliding arm penetrating hole. Therefore, the drawing structure of the headphone is simple to assemble, firm and reliable, and can provide relatively balanced damping in the length adjusting process.

Description

Technical Field

[0001] The utility model relates to the technical field of earphones, in particular to a pulling structure and a head-mounted earphone. Background Art

[0002] Earphones are a widely used audio playback device. According to the wearing method of earphones, they are mainly divided into types such as head-mounted, ear-hook, and earplug types. In order to facilitate the head-mounted earphone to adapt to the head shapes of different users, some head-mounted earphones are designed with a pulling structure to achieve adjustable headband length. However, the existing pulling structures of head-mounted earphones have problems such as complex structures and poor adjustment feel. Content of the Utility Model

[0003] In view of this, the purpose of the present utility model is to provide a pulling structure and a head-mounted earphone, which are beneficial to solving or improving at least some of the above problems existing in the prior art.

[0004] In a first aspect, an embodiment of the present utility model provides a pulling structure for a head-mounted earphone. The pulling structure includes a headband main body, a sliding arm, and a pulling damping block; the headband main body includes a headband housing and two headband end caps. A slideway is provided in the headband housing. Each headband end cap is respectively arranged at a corresponding end of the headband housing and is connected to the headband housing through a headband fastener. A damping block accommodation hole is provided at the end of the headband housing. The damping block accommodation hole has an inclined wall hole section. The headband end cap has a sliding arm through hole. The inclined wall hole section gradually contracts from one end close to the sliding arm through hole to the end far from the sliding arm through hole. The slideway is communicated with the sliding arm through hole. The headband end cap at least partially covers the damping block accommodation hole; the sliding arm has a sliding section and a connecting section connected in sequence. The connecting section is slidably arranged in the slideway and passes through the sliding arm through hole. The connecting section is configured to be connected to the ear cup of the head-mounted earphone; the pulling damping block is at least partially accommodated in the damping block accommodation hole and abuts against the side surface of the sliding section to provide damping when the sliding section slides along the slideway.

[0005] Furthermore, the pulling structure further includes a spring wire, which is accommodated in the headband housing. The spring wire has a fixed part and a free end. The fixed part is fixedly connected to the headband housing, and the free end is connected to the sliding section.

[0006] Furthermore, the pulling damping block has a damping groove. The sliding section is arranged in the damping groove and contacts the side wall of the damping groove. The notch of the damping groove is opposite to the side wall of the damping block accommodation hole.

[0007] Furthermore, the damping block accommodation hole has an inclined wall hole section, and the inclined wall hole section gradually contracts from one end close to the sliding arm through hole to the end far from the sliding arm through hole.

[0008] Further, the head beam housing includes an upper housing and a lower housing connected to each other. The upper housing has a main body portion and an extension portion. The main body portion is disposed on the upper side of the lower housing. The extension portion is provided at the end of the main body portion and extends inwardly. The extension portion is connected to the end of the lower housing. The damping block accommodation hole is disposed in the extension portion. The head beam end cap covers the outside of the extension portion.

[0009] Further, the extension portion has a first head beam mounting hole and a end cap positioning groove. The first head beam mounting hole penetrates the bottom of the end cap positioning groove. The end of the lower housing has a second head beam mounting hole corresponding to the first head beam mounting hole. A end cap positioning block protrudes from the side of the head beam end cap opposite to the extension portion. The end cap positioning block has a third head beam mounting hole. The end cap positioning block is connected to the end cap positioning groove. The head beam fastener passes through the third head beam mounting hole, the first head beam mounting hole and the second head beam mounting hole to connect the head beam end cap, the upper housing and the lower housing.

[0010] Further, the head beam housing has a first stop surface. The sliding section has a clamping platform. The first stop surface is disposed opposite to the clamping platform. The first stop surface is configured to cooperate with the clamping platform to limit the maximum length of the sliding section exposed from the head beam main body.

[0011] Further, the sliding section further has a fixing groove. The slideway has an elastic bump. The fixing groove is disposed close to the clamping platform. When the fixing groove is connected to the elastic bump, the clamping platform is away from the first stop surface.

[0012] Further, the sliding section has a second stop surface. The second stop surface is disposed opposite to the outer end surface of the head beam end cap. When the second stop surface abuts against the outer end surface of the head beam end cap, the elastic bump is connected to the fixing groove.

[0013] Further, the bottom of the slideway has an avoidance groove. The extending direction of the avoidance groove is parallel to the sliding direction of the sliding arm. The clamping platform is disposed in the avoidance groove. The first stop surface is a side wall of the avoidance groove.

[0014] Further, the inner wall of the damping groove has a raised portion. The extending direction of the raised portion intersects with the sliding direction of the sliding section.

[0015] In a second aspect, an embodiment of the present invention further provides a pair of headphones, including the pulling structure as described in the first aspect and two ear shells. Each ear shell is respectively disposed at one end of the pulling structure and connected to the corresponding connecting section.

[0016] An embodiment of the present utility model provides a draw structure and a head-mounted earphone. The draw structure is provided with a slideway inside the head beam housing. The end of the head beam housing has a damping block accommodation hole. The sliding arm has a sliding section and a connecting section connected in sequence. The connecting section is slidably arranged in the slideway. The draw damping block is at least partially accommodated in the damping block accommodation hole and abuts against the side surface of the sliding section to provide damping when the sliding section slides along the slideway. The head beam end cap at least partially covers the damping block accommodation hole. The damping block accommodation hole has an inclined wall hole section, and the inclined wall hole section gradually contracts from one end close to the perforation of the sliding arm on the head beam end cap to the end far from the perforation of the sliding arm. Thus, the draw structure of the head-mounted earphone is simple in assembly, firm and reliable, and can provide relatively balanced damping during the process of adjusting the length. Description of the Drawings

[0017] Through the following description of the embodiments of the present utility model with reference to the drawings, the above and other objects, features and advantages of the present utility model will become more clear. In the drawings:

[0018] Figure 1 is a schematic perspective view of a head-mounted earphone according to an embodiment of the present utility model;

[0019] Figure 2 is an exploded view of a head-mounted earphone according to an embodiment of the present utility model;

[0020] Figure 3 is an exploded view of a rotation structure according to an embodiment of the present utility model;

[0021] Figure 4 is a schematic cross-sectional view of a rotation structure according to an embodiment of the present utility model;

[0022] Figure 5 is a schematic perspective view of a sliding arm according to an embodiment of the present utility model;

[0023] Figure 6 is a schematic perspective view of a rotation bracket from one perspective according to an embodiment of the present utility model;

[0024] Figure 7 is a schematic perspective view of a rotation bracket from another perspective according to an embodiment of the present utility model;

[0025] Figure 8 is a schematic diagram of the connection between a rotation bracket and a sliding arm according to an embodiment of the present utility model;

[0026] Figure 9 is a schematic cross-sectional view of the connection between a rotation bracket, a sliding arm, a rotation damping block and an ear shell top cover according to an embodiment of the present utility model;

[0027] Figure 10Schematic perspective view of the rotary damping block according to an embodiment of the present utility model;

[0028] Figure 11 Schematic view of the rotary structure according to an embodiment of the present utility model after removing the earphone shell top cover;

[0029] Figure 12 Exploded schematic view of the drawer structure according to an embodiment of the present utility model;

[0030] Figure 13 Partial schematic view of the lower shell according to an embodiment of the present utility model;

[0031] Figure 14 Partial schematic view of the upper shell according to an embodiment of the present utility model;

[0032] Figure 15 Schematic view of the head beam end cap according to an embodiment of the present utility model;

[0033] Figure 16 Schematic view of the drawer damping block according to an embodiment of the present utility model;

[0034] Figure 17 Partial sectional view of the drawer structure when the sliding section retracts into the head beam main body according to an embodiment of the present utility model;

[0035] Figure 18 Partial sectional view of the drawer structure when the sliding section extends to the maximum length out of the head beam main body according to an embodiment of the present utility model.

[0036] Explanation of reference numerals:

[0037] 10 - Ear shell; 11 - Second mounting hole; 12 - Second mounting groove; 13 - Connecting column; 20 - Rotating bracket; 21 - First mounting groove; 211 - Positioning groove section; 212 - Shrinkage groove section; 213 - Stopper groove section; 214 - Limiting projection; 22 - First mounting hole; 23 - Second positioning structure; 30 - Sliding arm; 31 - Sliding section; 311 - Snap table; 312 - Fixed groove; 313 - Second stop surface; 32 - Connecting section; 321 - Limiting groove; 3211 - First limiting wall; 3212 - Second limiting wall; 3213 - Stop end face; 322 - Damping shaft section; 323 - Stop shaft section; 324 - Transition shaft section; 325 - Limiting shaft section; 40 - Rotating damping block; 41 - Rotating damping hole; 42 - Adjusting groove; 43 - Fourth mounting hole; 44 - First positioning structure; 50 - Head beam main body; 51 - Head beam housing; 511 - Slideway; 5111 - Elastic bump; 5112 - Avoidance groove; 512 - Damping block accommodation hole; 5121 - Tapered wall hole section; 513 - Upper housing; 5131 - Main body part; 5132 - Extension part; 5133 - First head beam mounting hole; 5134 - End cover positioning groove; 514 - Lower housing; 5141 - Second head beam mounting hole; 515 - First stop surface; 52 - Head beam end cover; 521 - Sliding arm perforation; 522 - End cover positioning block; 523 - Third head beam mounting hole; 53 - Head beam fastener; 60 - Ear shell top cover; 61 - Ear shell fastener; 62 - Third mounting hole; 63 - Positioning groove; 70 - Pull - out damping block; 71 - Damping groove; 72 - Protrusion; 80 - Spring wire; 81 - Fixed part; 82 - Free end. Detailed implementation manners

[0038] The following describes the present application based on embodiments, but the present application is not limited to these embodiments. In the following detailed description of the present application, some specific details are described in detail. Those skilled in the art can fully understand the present application without the description of these details. In order to avoid obscuring the essence of the present application, well - known methods, processes, flows, elements, and circuits are not described in detail.

[0039] In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale.

[0040] Unless otherwise clearly defined and limited, the terms "install", "connect", "join", "fix", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] For ease of explanation, spatially relative terms such as "inner", "outer", "beneath", "below", "lower", "above", "upper", etc. are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatially relative descriptive terms used herein should be interpreted accordingly.

[0042] Unless the context clearly requires otherwise, the words such as "include", "comprise" and similar words throughout the application shall be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, the meaning of "including but not limited to".

[0043] In the description of this application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0044] The embodiment of the utility model provides a head-mounted earphone and a rotating structure for the head-mounted earphone. Referring to Figure 1 and Figure 2 , the head-mounted earphone of the embodiment of the utility model includes a head beam main body 50 and two rotating structures respectively arranged at both ends of the head beam main body 50. The head beam main body 50 is used to hang on the user's head when the head-mounted earphone is in use. The rotating structure includes an ear shell 10, and the ear shell 10 is used to accommodate the speaker unit of the head-mounted earphone. By arranging the rotating structure, the ear shell 10 can rotate relative to the head beam main body 50, so as to facilitate the storage of the head-mounted earphone. The rotating structure of the embodiment of the utility model will be specifically described below with reference to the drawings.

[0045] Referring to Figure 3 and Figure 4 , in this embodiment, the rotating structure further includes a rotating bracket 20 and a sliding arm 30. Referring to Figures 3 - 5 and Figure 8, the sliding arm 30 has a sliding section 31 and a connecting section 32 connected in sequence, wherein the sliding section 31 is telescopically connected to the head beam main body 50, so that the length of the head-mounted earphone can be adjusted to fit the heads of different users. The rotating bracket 20 is connected to the ear cup 10 and circumferentially fixed relative to the ear cup 10. The connecting section 32 of the sliding arm 30 is exposed outside the head beam main body 50 and rotatably connected to the rotating bracket 20. Thus, the ear cup 10 and the rotating bracket 20 can rotate around the connecting section 32, realizing the rotation of the ear cup 10 relative to the head beam main body 50. Optionally, the sliding arm 30 can have a hollow structure inside, which can realize the function of routing wires and facilitate the cable connection to the speaker unit in the ear cup 10.

[0046] Referring to Figure 6 and Figure 7 , the rotating bracket 20 has a first rotation limiting structure, and the connecting section 32 of the sliding arm 30 has a second rotation limiting structure corresponding to the first rotation limiting structure. The first rotation limiting structure and the second rotation limiting structure cooperate to realize the rotation range limitation of the rotating bracket 20 and the ear cup 10 relative to the sliding arm 30.

[0047] In some embodiments, as Figure 5 shown, the second rotation limiting structure is a limiting groove 321. The limiting groove 321 extends along the circumferential direction of the connecting section 32, and the limiting groove 321 has a first limiting wall 3211 and a second limiting wall 3212 oppositely arranged along the circumferential direction of the connecting section 32. As Figures 6 - 8 shown, the first rotation limiting structure of the rotating bracket 20 is a limiting bump 214. The limiting bump 214 is arranged in the limiting groove 321 and can move between the first limiting wall 3211 and the second limiting wall 3212. By setting the relative positions of the first limiting wall 3211 and the second limiting wall 3212, the movement range of the limiting bump 214 in the limiting groove 321 can be set, and further the rotation angle range of the ear cup 10 relative to the head beam main body 50 can be set. By adopting this design in the embodiments of the present invention, it is convenient to set the rotation angle range of the ear cup 10, and a larger rotation angle can be allowed and the connection strength can be ensured, preventing damage to the rotation structure caused by excessive torsion.

[0048] Optionally, as Figure 4 and Figure 9 shown, the limiting groove 321 has a stop end face 3213. The stop end face 3213 is oppositely arranged with the top surface of the limiting bump 214 to limit the axial movement of the rotating bracket 20 along the connecting section 32 and prevent the rotating bracket 20 from axially disengaging along the sliding arm 30.

[0049] Referring to Figures 4 - 9, the rotating bracket 20 has a first mounting hole 22, and the first mounting hole 22 is spaced from the first rotation limiting structure. The ear shell 10 has a second mounting hole 11 corresponding to the position of the first mounting hole 22. The rotating structure further includes an ear shell fastener 61, and the ear shell fastener 61 passes through the first mounting hole 22 and the second mounting hole 11 to connect the rotating bracket 20 and the ear shell 10. The ear shell fastener 61 can be a pin, a screw, a bolt or other connecting member that can connect the ear shell 10 and the rotating bracket 20. Preferably, the ear shell fastener 61 is a detachable fastener to facilitate the maintenance of the rotating structure. For example, the ear shell fastener 61 can be a screw.

[0050] In some embodiments, referring to Figure 3 , Figure 4 and Figure 9 , the rotating structure further includes a rotating damping block 40 for contacting the connecting section 32 of the sliding arm 30, so as to provide damping during the rotation of the sliding arm 30 relative to the rotating bracket 20, so that the user can stabilize the ear shell 10 at the desired angle after rotating the ear shell 10 relative to the head beam body 50, achieving an angle positioning effect and preventing the ear shell 10 from rotating arbitrarily when not operated. The rotating damping block 40 can be made of any material that can provide damping by squeezing the sliding arm 30. For example, wear-resistant silica gel, wear-resistant rubber or other wear-resistant composite materials can be selected. In this embodiment, the rotating damping block 40 can be made of polyoxymethylene resin (POM) material. Polyoxymethylene resin has the characteristics of high hardness, high rigidity, high wear resistance, good elasticity and good dimensional stability, and is suitable for making the rotating damping block 40 to provide damping by friction with the connecting section 32.

[0051] In some embodiments, the rotating damping block 40 is provided at one end of the rotating bracket 20 and connected to the rotating bracket 20. The rotating damping block 40 is at least circumferentially fixed relative to the rotating bracket 20. While the sliding arm 30 rotates relative to the rotating bracket 20, it also rotates relative to the rotating damping block 40, and the rotating damping block 40 frictions with the connecting section 32 to provide damping. The rotating damping block 40 can include one or more, for example, it can be a block structure arranged outside the connecting section 32 and in contact with and squeezing the side surface of the connecting section 32. In one embodiment, referring to Figure 10 , the rotating damping block 40 has a rotating damping hole 41, and the connecting section 32 is inserted into the rotating damping block 40 and has an interference fit with the rotating damping hole 41. When the connecting section 32 is inserted into the rotating damping hole 41, the outer surface of the connecting section 32 is in close contact with the inner wall of the rotating damping hole 41, and a better damping effect can be achieved.

[0052] Optionally, as Figure 10As shown, the rotary damping block 40 further has an adjustment groove 42, which is opened on the side wall of the rotary damping hole 41 and can penetrate the side wall of the rotary damping hole 41 along the radial direction of the rotary damping hole 41. Refer to Figure 10 , the rotary damping block 40 can form a damping cylinder, the damping cylinder is a cylindrical structure, the rotary damping hole 41 is opened in the middle of the damping cylinder, and the damping cylinder surrounds the outside of the connecting section 32. The upper end of the adjustment groove 42 can extend to the end face of the damping cylinder. The setting of the adjustment groove 42 can make the damping cylinder have a certain deformation space, which is convenient for the connecting section 32 to be installed into the rotary damping hole 41, and by designing the width and length of the adjustment groove 42, the contact tightness between the rotary damping hole 41 and the connecting section 32 can be adjusted, so as to realize the setting of the damping force between the rotary damping hole 41 and the connecting section 32.

[0053] In some embodiments, refer to Figure 11 , one end of the ear shell 10 for connecting with the head beam main body 50 has a second installation groove 12, and the rotary bracket 20 and the rotary damping block 40 are fixed in the second installation groove 12, thereby playing a role in hiding and protecting the rotary bracket 20 and the rotary damping block 40. The contour shape of the second installation groove 12 matches that of the rotary bracket 20 and the rotary damping block 40 to realize the positioning of the rotary bracket 20 and the rotary damping block 40. Preferably, the second installation groove 12 is a non-rotary shape, which can prevent the rotary bracket 20 and the rotary damping block 40 from rotating in the second installation groove 12. Optionally, a plurality of anti-slip protrusions are formed on the side surfaces of the rotary bracket 20 and the rotary damping block 40, and the anti-slip protrusions can be mutually extruded with the side wall of the second installation groove 12 to prevent the rotary bracket 20 or the rotary damping block 40 from shaking in the second installation groove 12, ensuring the user experience.

[0054] Refer to Figure 3 and Figure 4 , the rotary structure further includes an ear shell top cover 60. The ear shell top cover 60 is connected with the ear shell 10, and one side of the rotary bracket 20 away from the bottom of the second installation groove 12 and located at the opening of the second installation groove 12 at least partially covers the opening of the second installation groove 12, so as to play a role in shielding and protecting the rotary bracket 20 and other structures in the second installation groove 12. The earphone top cover has a third installation hole 62 corresponding to the position of the first installation hole 22, and the ear shell fastener 61 also passes through the third installation hole 62 to connect the ear shell top cover 60, the rotary bracket 20 and the ear shell 10.

[0055] Optionally, the rotary damping block 40 has a fourth installation hole 43. As Figure 4 and Figure 11As shown, a connecting post 13 protrudes from the bottom of the second installation groove 12, and the second installation hole 11 is provided in the connecting post 13. The connecting post 13 extends towards the opening of the second installation groove 12. The sizes of the fourth installation hole 43 and the first installation hole 22 correspond to the size of the connecting post 13, such that the connecting post 13 passes through the fourth installation hole 43 of the rotary damping block 40 and the first installation hole 22 of the rotary bracket 20 and is oppositely arranged with the earphone shell top cover 60. Thus, the connecting post 13 can position the rotary damping block 40 and the rotary bracket 20. Further, the connecting posts 13 can be two spaced apart, and each connecting post 13 is provided with a corresponding second installation hole 11. Thus, after the connecting posts 13 pass through the fourth installation holes 43 of the rotary damping block 40 and the first installation holes 22 of the rotary bracket 20, circumferential fixation of the rotary damping block 40 and the rotary bracket 20 can be achieved.

[0056] Referring to Figure 4 , in one embodiment, the side of the earphone shell top cover 60 opposite to the rotary bracket 20 has a positioning groove 63. The position and shape of the positioning groove 63 match those of the connecting post 13, and the third installation hole 62 is opened at the bottom of the positioning groove 63. After the earphone shell top cover 60 is installed on the earphone shell 10, the end of the connecting post 13 is arranged in the positioning groove 63. Thus, positioning between the earphone shell 10 and the earphone shell top cover 60 can be achieved. At the same time, since the connecting post 13 also passes through the fourth installation hole 43 on the rotary damping block 40 and the first installation hole 22 on the rotary bracket 20, after the earphone shell top cover 60 and the connecting post 13 are connected by the earphone fastener 61, the rotary damping block 40 and the rotary bracket 20 located between the earphone shell top cover 60 and the bottom of the second installation groove 12 can also be well fixed. Optionally, the side of the earphone shell top cover 60 opposite to the rotary bracket 20 has a counterbore, the earphone fastener 61 is a screw, and the head of the earphone fastener 61 is arranged in the counterbore. Thus, the aesthetics of the head-mounted earphone can be improved.

[0057] In some embodiments, referring to Figure 10 and Figure 7 , the side of the rotary damping block 40 opposite to the rotary bracket 20 has a first positioning structure 44, and the side of the rotary bracket 20 opposite to the rotary damping block 40 has a second positioning structure 23 corresponding to the first positioning structure 44. The first positioning structure 44 and the second positioning structure 23 cooperate to achieve positioning connection between the rotary damping block 40 and the rotary bracket 20, thereby ensuring the relative positions among the connecting section 32, the rotary damping block 40, and the rotary bracket 20. Optionally, one of the first positioning structure 44 and the second positioning structure 23 is a positioning groove, and the other is a positioning block. The positioning block is inserted into the positioning groove to achieve positioning by means of plugging. For example, in one implementation manner, referring to Figure 10 and Figure 7 , the first positioning structure 44 includes a positioning groove, and the second positioning structure 23 includes a positioning block.

[0058] In some embodiments, with reference to Figures 4 - 9 , the connecting section 32 has a damping shaft section 322, a stop shaft section 323, a transition shaft section 324, and a limit shaft section 325 arranged in sequence along the extending direction of the sliding arm 30. The damping shaft section 322 is located at the end of the sliding arm 30 and is inserted into the rotary damping hole 41. The diameter of the stop shaft section 323 is larger than that of the damping shaft section 322 and the transition shaft section 324. The stop shaft section 323 is clamped between the rotary damping block 40 and the rotary bracket 20, which can prevent the rotary bracket 20 from shifting along the sliding arm 30 and prevent the ear shell 10 from shaking relative to the sliding arm 30. The second rotary limit structure is a limit groove 321 and is arranged on the limit shaft section 325. The rotary bracket 20 is provided with a first mounting groove 21, and the first mounting groove 21 has a positioning groove section 211, a contraction groove section 212, and a stop block groove section 213 arranged in sequence along the extending direction of the sliding arm 30. At least a part of the stop shaft section 323 is arranged in the positioning groove section 211, and a limit lug 214 protrudes from the stop block groove section 213. The distance between the two opposite side walls of the first mounting groove 21 is reduced at the contraction groove section 212 to form a stepped structure, and the transition shaft section 324 is arranged in the contraction groove section 212. Since the width of the contraction groove section 212 is small, the stop shaft section 323 is blocked by the stepped structure formed between the contraction groove section 212 and the positioning groove section 211 to achieve axial fixation. The opening of the first mounting groove 21 is opened on the side of the rotary bracket 20, and the sliding arm 30 can be inserted into the first mounting groove 21 from the opening of the first mounting groove 21, which is convenient for assembly.

[0059] For the rotary structure of the embodiment of the present utility model, by connecting the rotary bracket 20 to the ear shell 10, a first rotary limit structure is arranged on the rotary bracket 20, and a second rotary limit structure is arranged on the sliding arm 30 connected to the head beam main body 50. The second rotary limit structure cooperates with the first rotary limit structure to limit the rotation range of the ear shell 10 relative to the sliding arm 30. Thus, by arranging the rotary limit structure on the sliding arm 30 of the head-mounted earphone, the structure is simple, convenient for assembly, and has good strength. At the same time, this arrangement allows the ear shell 10 to have a larger rotation range. Moreover, in the embodiment of the present utility model, a rotary damping block 40 is arranged at one end of the rotary bracket 20 to contact the connecting section 32 to provide damping during the rotation of the sliding arm 30 relative to the rotary bracket 20. Therefore, a good adjustment feel and angle positioning effect can be obtained.

[0060] In some application scenarios, the length of the head-mounted earphone is adjustable to meet the needs of users with different head shapes. Optionally, the sliding section 31 of the sliding arm 30 is telescopically connected to the head beam body 50. By adjusting the length of the sliding arm 30 exposed from the head beam body 50, the length of the head-mounted earphone can be conveniently adjusted. To achieve the length adjustment of the head-mounted earphone, the embodiment of the present utility model also provides a pulling structure for the head-mounted earphone, which will be specifically described below in conjunction with the accompanying drawings.

[0061] Referring to Figures 1 - 2 and Figures 12 - 18 , the pulling structure includes a head beam body 50, a sliding arm 30, and a pulling damping block 70. Among them, the sliding arm 30 can be the sliding arm 30 described in the above-mentioned rotation structure embodiment. The sliding arm 30 has a sliding section 31 and a connecting section 32 connected in sequence, wherein the connecting section 32 is connected to the ear cup 10, and the sliding section 31 is slidably connected to the head beam body 50.

[0062] The head beam body 50 includes a head beam housing 51 and two head beam end caps 52. Each head beam end cap 52 is respectively disposed at a corresponding end of the head beam housing 51 and is connected to the head beam housing 51 through a head beam fastener 53. The head beam fastener 53 can be a screw, a bolt, a pin, or other fasteners suitable for connecting the head beam housing 51 and the head beam end cap 52. Optionally, the head beam fastener 53 is selected as a detachable fastener, which is convenient for maintenance.

[0063] The head beam housing 51 has a slideway 511, and the sliding section 31 of the sliding arm 30 is slidably disposed in the slideway 511. The head beam end cap 52 has a sliding arm through hole 521, and the slideway 511 communicates with the sliding arm through hole 521, and the sliding arm 30 passes through the sliding arm through hole 521.

[0064] The pulling damping block 70 is disposed in the head beam body 50 and abuts against the side surface of the sliding section 31 to provide damping when the sliding section 31 slides along the slideway 511. When the user pulls out the sliding arm 30 to a certain length for wearing, the damping provided by the pulling damping block 70 can stabilize the sliding arm 30 at this position, achieving the length positioning effect. Similar to the rotation damping block 40, the pulling damping block 70 can be made of any material that can provide damping by squeezing the sliding arm 30. For example, wear-resistant silica gel, wear-resistant rubber, or other wear-resistant composite materials can be selected.

[0065] Optionally, referring to Figure 12, the telescopic structure further includes a spring wire 80, which is accommodated in the head beam housing 51. The spring wire 80 has a fixed portion 81 and a free end 82. The fixed portion 81 is fixedly connected to the head beam housing 51, and the free end 82 is connected to the sliding section 31. The spring wire 80 is a stretchable cable formed by curling or folding. The elastic force of the spring wire 80 can assist the sliding arm 30 to contract into the head beam main body 50 for reset, and provide a certain feedback force during the process of the user pulling out the sliding arm 30, having a better operating feel. There can be one spring wire 80, and the fixed portion 81 is arranged in the middle of the spring wire 80, and the fixed portion 81 can be fixed at the middle position of the head beam housing 51; both ends of the spring wire 80 are free ends 82, and the free ends 82 are connected to the sliding arm 30. When the sliding section 31 is pulled out of the head beam main body 50, the spring wire 80 is stretched. Optionally, a main board is arranged in each ear shell 10 to control the operation of the speaker unit in the ear shell 10. The free end 82 of the spring wire 80 passes through the hollow structure inside the sliding arm 30, so that the spring wire 80 passes into the ear shell 10 and is electrically connected to the main board arranged in the ear shell 10.

[0066] Referring to Figure 17 and Figure 18 , the end of the head beam housing 51 has a damping block accommodation hole 512, and the telescopic damping block 70 is at least partially accommodated in the damping block accommodation hole 512. The size of the damping block accommodation hole 512 matches the telescopic damping block 70 to position the telescopic damping block 70. Optionally, the head beam end cap 52 at least partially covers the damping block accommodation hole 512 to protect the telescopic damping block 70.

[0067] Optionally, referring to Figure 16 , the telescopic damping block 70 has a damping groove 71, the sliding section 31 is arranged in the damping groove 71 and contacts the side wall of the damping groove 71, and the notch of the damping groove 71 is opposite to the side wall of the damping block accommodation hole 512. The sliding section 31 can be conveniently snapped into the damping groove 71 from the notch of the damping groove 71, and then the telescopic damping block 70 can be inserted into the damping block accommodation hole 512, thereby improving the assembly convenience.

[0068] In one embodiment, further, referring to Figure 14 、 Figures 17 - 18, the damping block accommodating hole 512 has an inclined wall hole section 5121. The inclined wall hole section 5121 gradually contracts from one end close to the sliding arm perforation 521 to the other end far from the sliding arm perforation 521, forming a structure similar to a funnel. When the pulling damping block 70 is arranged in the damping block accommodating hole 512, the outer side wall of the pulling damping block 70 is squeezed against the inclined wall hole section 5121. The sliding arm 30 has a tendency to contract into the head beam main body 50 under the elastic force of the spring wire 80. The frictional force between the sliding arm 30 and the pulling damping block 70 drives the pulling damping block 70 to move in a direction away from the sliding arm perforation 521. Since the damping groove 71 is an open structure and the notch of the damping groove 71 faces the side wall of the damping block accommodating hole 512, the inclined wall hole section 5121 squeezes the pulling damping block 70, ensuring that the side wall of the damping groove 71 can be tightly attached to the sliding section 31 to provide damping. Further, when the sliding arm 30 is pulled out by a certain length by the user, the damping of the pulling damping block 70 on the sliding section 31 can achieve the length positioning effect of the head-mounted earphone, preventing the sliding arm 30 from retracting arbitrarily during operation.

[0069] In some embodiments, referring to Figure 12 , the head beam housing 51 includes an upper housing 513 and a lower housing 514 which are connected to each other. The upper housing 513 and the lower housing 514 enclose an internal cavity to accommodate the spring wire 80 and at least a part of the sliding section 31. The head beam housing 51 forms a structure similar to a "U" shape. The upper housing 513 has a main body portion 5131 and an extension portion 5132. The main body portion 5131 is arranged on the upper side of the lower housing 514, and the main body portion 5131 and the lower housing 514 can be fastened and fixed to each other. The extension portion 5132 is arranged at the end of the main body portion 5131 and extends inwardly (i.e., the inner side of the "U" shape structure). The extension portion 5132 is connected to the end of the lower housing 514. The damping block accommodating hole 512 can be arranged in the extension portion 5132, and the head beam end cap 52 is covered outside the extension portion 5132 to protect the pulling damping block 70.

[0070] Optionally, as Figure 14 shown, the extension portion 5132 has a first head beam mounting hole 5133. The first head beam mounting hole 5133 penetrates through the bottom of the end cap positioning groove 5134. The end of the lower housing 514 has a second head beam mounting hole 5141 corresponding to the first head beam mounting hole 5133. As Figure 15As shown, on the side of the head beam end cap 52 opposite to the extension part 5132, there is a convex end cap positioning block 522. The end cap positioning block 522 has a third head beam mounting hole 523, and the third head beam mounting hole 523 corresponds to the first head beam mounting hole 5133 and the second head beam mounting hole 5141. The extension part 5132 also has an end cap positioning groove 5134. The shape and position of the end cap positioning groove 5134 match those of the end cap positioning block 522, so that the end cap positioning block 522 can be inserted into the end cap positioning groove 5134 for positioning. The head beam fastener 53 passes through the third head beam mounting hole 523, the first head beam mounting hole 5133, and the second head beam mounting hole 5141 to connect the head beam end cap 52, the upper housing 513, and the lower housing 514.

[0071] In some embodiments, referring to Figure 18 , the head beam housing 51 has a first stop surface 515, and the sliding section 31 has a clamping platform 311. The first stop surface 515 is disposed opposite to the clamping platform 311. The first stop surface 515 is configured to cooperate with the clamping platform 311 to limit the maximum length of the sliding section 31 exposed from the head beam main body 50. The sliding section 31 also has a fixing groove 312, and the sliding track 511 has an elastic bump 5111 corresponding to the fixing groove 312. The fixing groove 312 is disposed close to the clamping platform 311. When the elastic bump 5111 engages with the fixing groove 312, the extended length of the sliding arm 30 can be positioned. Optionally, when the fixing groove 312 is connected to the elastic bump 5111, the clamping platform 311 is away from the first stop surface 515, and the sliding arm 30 can be limited to a shorter extended length. For example, when the fixing groove 312 is connected to the elastic bump 5111, the extended length of the sliding arm 30 is close to or equal to the shortest value, which can prevent the ear shell 10 from directly colliding with the head beam main body 50, and at the same time avoid the sliding arm 30 from arbitrarily extending when the head-mounted earphone is in a storage state with a smaller length.

[0072] In some embodiments, referring to Figure 17 , the sliding section 31 has a second stop surface 313. The second stop surface 313 is disposed opposite to the outer end surface of the head beam end cap 52, and is used to limit the shortest length of the sliding section 31 retracting into the head beam main body 50, so as to avoid the ear shell 10 directly colliding with the head beam main body 50. Optionally, when the second stop surface 313 abuts against the outer end surface of the head beam end cap 52, the elastic bump 5111 is connected to the fixing groove 312, and the head-mounted earphone can be conveniently positioned at a shorter length, which is convenient for the storage of the head-mounted earphone.

[0073] Referring to Figure 13, the bottom of the slideway 511 has an avoidance groove 5112, and the extending direction of the avoidance groove 5112 is parallel to the sliding direction of the sliding section 31, which is used to avoid the clamping platform 311 when the sliding arm 30 slides along the slideway 511. The clamping platform 311 is arranged in the avoidance groove 5112. Optionally, the first stop surface 515 is a side wall of the avoidance groove 5112.

[0074] Referring to Figure 16 , the inner wall of the damping groove 71 has a raised portion 72, and the extending direction of the raised portion 72 intersects with the sliding direction of the sliding section 31. For example, optionally, the raised portion 72 is perpendicular to the sliding direction of the sliding section 31. Thus, the raised portion 72 can form a relatively tight contact with the side surface of the sliding section 31 to provide relatively stable damping.

[0075] In the drawing structure of the embodiment of the present utility model, by arranging the slideway 511 in the head beam housing 51, the end of the head beam housing 51 has a damping block accommodation hole 512, the sliding arm 30 has a sliding section 31 and a connecting section 32 connected in sequence, the connecting section 32 is slidably arranged in the slideway 511, and at least part of the drawing damping block 70 is accommodated in the damping block accommodation hole 512 and abuts against the side surface of the sliding section 31 to provide damping when the sliding section 31 slides along the slideway 511. Thus, the drawing structure of the headset is simple in assembly, firm and reliable, and can provide relatively balanced damping during the process of adjusting the length.

[0076] In the headset of the embodiment of the present utility model, by reusing the sliding arm 30, the sliding arm 30 has both the function of rotational limit and the function of adjusting the length of the headset, reducing the number of components, making the overall structure of the headset relatively simple and facilitating assembly. At the same time, it is beneficial to improve the reliability of the overall structure of the headset.

[0077] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drawable structure for a headphone, characterized in that, The telescoping structure includes: A head beam main body (50), including a head beam housing (51) and two head beam end caps (52). A slideway (511) is provided inside the head beam housing (51). Each head beam end cap (52) is respectively arranged at a corresponding end of the head beam housing (51) and is connected to the head beam housing (51) through a head beam fastener (53). An end of the head beam housing (51) has a damping block accommodating hole (512). The damping block accommodating hole (512) has an inclined wall hole section (5121). The head beam end cap (52) has a sliding arm through hole (521). The inclined wall hole section (5121) gradually contracts from one end close to the sliding arm through hole (521) to the end far from the sliding arm through hole (521). The slideway (511) communicates with the sliding arm through hole (521). The head beam end cap (52) at least partially covers the damping block accommodating hole (512); A sliding arm (30), having a sliding section (31) and a connecting section (32) connected in sequence. The connecting section (32) is slidably arranged in the slideway (511) and passes through the sliding arm through hole (521). The connecting section (32) is configured to be connected to the ear cup (10) of the headphone; and A telescoping damping block (70), at least partially accommodated in the damping block accommodating hole (512) and abutted against the side surface of the sliding section (31) to provide damping when the sliding section (31) slides along the slideway (511).

2. The draw structure according to claim 1, characterized in that, It further includes: A spring wire (80), accommodated in the head beam housing (51). The spring wire (80) has a fixed part (81) and a free end (82). The fixed part (81) is fixedly connected to the head beam housing (51). The free end (82) is connected to the sliding section (31).

3. The pull-out structure according to claim 1, wherein The telescoping damping block (70) has a damping groove (71). The sliding section (31) is arranged in the damping groove (71) and contacts the side wall of the damping groove (71). The notch of the damping groove (71) is opposite to the side wall of the damping block accommodating hole (512).

4. The pull-out structure according to claim 1, wherein The head beam housing (51) includes an upper housing (513) and a lower housing (514) connected to each other. The upper housing (513) has a main body part (5131) and an extension part (5132). The main body part (5131) is arranged on the upper side of the lower housing (514). The extension part (5132) is arranged at the end of the main body part (5131) and extends inward. The extension part (5132) is connected to the end of the lower housing (514). The damping block accommodating hole (512) is arranged in the extension part (5132). The head beam end cap (52) covers the outside of the extension part (5132).

5. The draw structure according to claim 4, characterized in that The extension part (5132) has a first head beam mounting hole (5133) and an end cap positioning groove (5134). The first head beam mounting hole (5133) penetrates through the bottom of the end cap positioning groove (5134). The end of the lower housing (514) has a second head beam mounting hole (5141) corresponding to the first head beam mounting hole (5133). On the side of the head beam end cap (52) opposite to the extension part (5132), there protrudes an end cap positioning block (522). The end cap positioning block (522) has a third head beam mounting hole (523). The end cap positioning block (522) is connected to the end cap positioning groove (5134). The head beam fastener (53) passes through the third head beam mounting hole (523), the first head beam mounting hole (5133), and the second head beam mounting hole (5141) to connect the head beam end cap (52), the upper housing (513), and the lower housing (514).

6. The draw structure according to claim 1, wherein The head beam housing (51) has a first stop surface (515). The sliding section (31) has a clamping table (311). The first stop surface (515) is arranged opposite to the clamping table (311). The first stop surface (515) is configured to cooperate with the clamping table (311) to limit the maximum length of the sliding section (31) exposed from the head beam main body (50).

7. The pull-out structure according to claim 6, characterized in that, The sliding section (31) further has a fixing groove (312). The slideway (511) has an elastic bump (5111). The fixing groove (312) is arranged close to the clamping table (311). When the fixing groove (312) is connected to the elastic bump (5111), the clamping table (311) is away from the first stop surface (515).

8. The draw structure according to claim 7, characterized in that, The sliding section (31) has a second stop surface (313). The second stop surface (313) is arranged opposite to the outer end surface of the head beam end cap (52). When the second stop surface (313) abuts against the outer end surface of the head beam end cap (52), the elastic bump (5111) is connected to the fixing groove (312).

9. The drawable structure according to claim 6, characterized in that, The bottom of the slideway (511) has an avoidance groove (5112). The extending direction of the avoidance groove (5112) is parallel to the sliding direction of the sliding arm (30). The clamping table (311) is arranged in the avoidance groove (5112). The first stop surface (515) is a side wall of the avoidance groove (5112).

10. The drawer structure according to claim 3, characterized in that, The inner wall of the damping groove (71) has a raised portion (72). The extending direction of the raised portion (72) intersects with the sliding direction of the sliding section (31).

11. A head-mounted earphone, characterized in that, Comprising: The pulling structure according to any one of claims 1 - 10; And Two ear shells (10), each ear shell (10) is respectively arranged at one end of the pulling structure and is connected to the corresponding connecting section (32).

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