Telescopic adjusting structure and earphone

Abstract

The utility model relates to the technical field of earphones, in particular to a telescopic adjusting structure and an earphone, in the telescopic adjusting structure, a fixed part is provided with a sleeve, a part of a telescopic part can be inserted into the sleeve in a reciprocating motion mode, one of the sleeve and the telescopic part is provided with a plurality of positioning holes formed in the extension direction of the sleeve at intervals, and the other one is provided with an elastic protruding part. The elastic stretching direction of the elastic convex part is perpendicular to the extending direction of the sleeve, and in the process that the stretching part reciprocates relative to the sleeve, the elastic convex part which elastically stretches in the direction perpendicular to the extending direction of the sleeve is matched with different positioning holes in a positioning mode, so that stretching adjustment of the stretching adjusting structure is achieved; the probability of attenuation of adjusting and positioning force caused by abrasion of the edge of the positioning hole can be reduced, and the reliability of the telescopic adjusting structure is improved; one of the sleeve and the telescopic part is provided with a guide groove, and the other one is provided with a guide convex part which is in guide fit with the guide groove, so that the guidance quality and reliability of reciprocating motion of the telescopic part relative to the fixed part can be improved.

Description

Technical Field

[0001] This application relates to the field of headphone technology, specifically to a telescopic adjustment structure and headphones. Background Technology

[0002] Headphones are a common consumer electronics product. To meet people's needs for headphones, various types of headphones have emerged, one of which is the over-ear headphone. Over-ear headphones typically consist of a headband and earpieces connected to both ends of the headband. When worn, the two earpieces correspond to the user's two ears, and each earpiece contains a sound-producing unit to enable the headphone's listening function.

[0003] Different people have different head sizes. For comfortable wear, headphone headbands usually have an adjustable structure, allowing users to adjust the headband to a suitable length according to their needs. Traditional adjustable structures include spring arms with elastic protrusions and multiple preset positioning grooves. The headband length is adjusted by the interaction of the elastic protrusions with the positioning grooves at different positions. However, after prolonged use, the positioning grooves will wear down, causing a decrease in the adjustment and positioning force of the headband, thus reducing the reliability of the headband's adjustable structure. Utility Model Content

[0004] This application provides a telescopic adjustment structure and headphones to solve the technical problems of attenuation of the adjustment positioning force of the telescopic adjustment structure and reduced reliability of the telescopic adjustment structure of the headband.

[0005] According to a first aspect, one embodiment provides a telescopic adjustment structure, comprising:

[0006] The fixed part has a sleeve;

[0007] A telescopic portion is arranged in the extending direction of the sleeve, and a portion of the telescopic portion is reciprocally inserted into the sleeve.

[0008] One of the sleeve and the telescopic part has a plurality of positioning holes spaced apart in the extension direction of the sleeve, and the other has an elastic protrusion that positions and engages with the positioning holes. The elastic extension direction of the elastic protrusion is perpendicular to the extension direction of the sleeve. One of the sleeve and the telescopic part has a guide groove, and the other has a guide protrusion that engages with the guide groove. The guide groove is arranged in the extension direction of the sleeve.

[0009] In one alternative embodiment, the telescopic portion includes an insert body and a guide, the resilient protrusion or the positioning hole being located on the insert body, the guide having a clearance structure for the resilient protrusion to pass through, and one of the guide groove and the guide protrusion being located on the guide.

[0010] In one alternative embodiment, the telescopic portion includes a first crimping assembly located outside the sleeve, wherein the first crimping assembly, in the arrangement direction of the insert body and the guide, achieves a fixed connection between the insert body and the guide outside the sleeve.

[0011] In one alternative embodiment, the first crimping assembly includes a crimping member connected to the insert body, and the guide member is crimped and fixed between the crimping member and the insert body.

[0012] In one alternative embodiment, the elastic protrusion includes a mounting cylinder, an elastic element, and a positioning element, wherein the positioning element is reciprocally mounted in the mounting cylinder via the elastic element, and the positioning element engages with the positioning hole.

[0013] In one optional embodiment, the positioning element is a positioning ball, the positioning hole is a circular hole, and the diameter of the positioning ball is larger than the diameter of the positioning hole.

[0014] In one alternative embodiment, the mounting cylinder has an opening facing the positioning hole in its extending direction, and a limiting protrusion is provided on the cylinder wall of the mounting cylinder. The limiting protrusion abuts against the positioning member in the extending direction of the mounting cylinder to prevent the positioning member from dislodging from the opening of the mounting cylinder.

[0015] In one optional embodiment, the fixing part includes an earphone headband and an auxiliary beam, the earphone headband and the auxiliary beam being connected to enclose and form the sleeve, and the guide protrusion or the guide groove being provided on the auxiliary beam.

[0016] In one alternative embodiment, the sleeve has an open end at one end in its extension direction for the telescopic portion to extend out; the fixing portion includes a second crimping assembly that securely connects the headband and the auxiliary beam at the open end; the open end abuts against the telescopic portion to prevent the telescopic portion from disengaging from the sleeve.

[0017] In one alternative embodiment, the second crimping assembly includes a first crimping member and a second crimping member connected in the arrangement direction of the headphone headband and the auxiliary beam, wherein the headphone headband and the auxiliary beam are clamped and fixed between the first crimping member and the second crimping member.

[0018] According to a second aspect, one embodiment provides an earphone including an earphone head and a telescopic beam, the telescopic beam including the telescopic adjustment structure described in any of the above embodiments, the telescopic portion having an external end located outside the sleeve, and the earphone head being connected to the external end.

[0019] According to the telescopic adjustment structure and earphone of the above embodiments, the telescopic adjustment structure includes a fixed part and a telescopic part. The fixed part has a sleeve, and the telescopic part is arranged in the extending direction of the sleeve. A portion of the telescopic part is reciprocally inserted into the sleeve. One of the sleeve and the telescopic part has a plurality of positioning holes arranged at intervals in the extending direction of the sleeve, and the other has an elastic protrusion that positions and cooperates with the positioning holes. The elastic extension and retraction direction of the elastic protrusion is perpendicular to the extending direction of the sleeve. In this way, during the reciprocating movement of the telescopic part in the sleeve, the total length of the fixed part and the telescopic part can be adjusted by positioning and cooperating with different positioning holes through the elastic protrusion that elastically extends and retracts in the perpendicular extending direction of the sleeve. This can reduce the probability of attenuation of the adjustment positioning force of the telescopic adjustment structure due to wear of the edge of the positioning hole, and help improve the reliability of the telescopic adjustment structure. Furthermore, one of the sleeve and the telescopic part has a guide groove, and the other has a guide protrusion that cooperates with the guide groove. The cooperation between the guide groove and the guide protrusion can increase the guiding nature of the reciprocating movement of the telescopic part relative to the fixed part and avoid telescopic jamming, which can also improve the reliability of the telescopic adjustment structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an earphone in one embodiment;

[0021] Figure 2 This is a schematic diagram of the telescopic adjustment structure in one embodiment;

[0022] Figure 3 This is a schematic diagram of the telescopic part in one embodiment of the telescopic adjustment structure;

[0023] Figure 4 This is a schematic diagram of the fixed part in an embodiment of a telescopic adjustment structure;

[0024] Figure 5 This is a schematic diagram of the internal structure of a telescopic adjustment structure according to one embodiment;

[0025] Figure 6 This is a partial cross-sectional structural diagram of a telescopic adjustment structure that conceals the headband of the headphones in one embodiment.

[0026] In the diagram: 1. Earphone head; 2. Telescopic beam; 3. Telescopic adjustment structure; 4. Fixing part; 40. Sleeve; 41. Earphone headband; 411. Positioning hole; 412. Positioning groove; 42. Auxiliary beam; 421. Inner part; 422. Outer part; 423. Positioning protrusion; 424. Guide groove; 43. Second crimping assembly; 431. First crimping piece; 432. Second crimping piece; 5. Telescopic part; 51. Insertion body; 511 512. Inner end; 513. Hook; 514. Mounting protrusion; 515. Mounting groove; 516. Outer end; 52. Elastic protrusion; 521. Mounting cylinder; 522. Limiting protrusion; 523. Elastic element; 524. Positioning element; 53. Guide element; 531. Avoidance structure; 532. Guide protrusion; 54. Insertion section; 541. First section; 542. Second section; 55. Outer end; 56. First crimping assembly; 561. Press-fitting component. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0028] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0029] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0030] This application provides a telescopic adjustment structure, which is mainly used in structures that can achieve length adjustment, such as telescopic brackets and telescopic beams of headphones. It mainly achieves the total length adjustment of the fixed part 4 and the telescopic part 5 by the elastic protrusion 52 that elastically expands and contracts in the extension direction of the vertical sleeve 40 and is positioned and engaged with different positioning holes 411. This can reduce the probability of the adjustment positioning force of the telescopic adjustment structure being weakened due to the wear of the edge of the positioning hole 411, and help improve the reliability of the telescopic adjustment structure.

[0031] Please refer to the telescopic adjustment structure of this application embodiment. Figures 2 to 6 The device includes a fixed portion 4 and a telescopic portion 5. The fixed portion 4 has a sleeve 40. In one embodiment, for a telescopic adjustment structure 3 applied to headphones, the extension direction of the sleeve 40 is an arc or curved extension direction; in other embodiments, for a telescopic adjustment structure applied to a telescopic bracket, the extension direction of the sleeve 40 can be a straight direction. The telescopic portion 5 is arranged in the extension direction of the sleeve 40, and a portion of the telescopic portion 5 is reciprocally inserted into the sleeve 40.

[0032] Specifically, the telescopic part 5 has a plug section 54 and an external end 55 arranged in its extending direction. The plug section 54 is connected to the external end 55. The portion of the plug section 54 away from the external end 55 can be located inside the sleeve 40 to achieve positioning and engagement with the sleeve 40. The external end 55 is located outside the sleeve 40 and is used to connect the earphone head 1 or the support base of the telescopic bracket.

[0033] The sleeve 40 of the fixed part 4 and the insertion section 54 of the telescopic part 5 are positioned and engaged by an elastic protrusion 52 and a plurality of positioning holes 411. The plurality of positioning holes 411 are arranged in the extending direction of the sleeve 40. In one embodiment, please refer to Figures 2 to 6Multiple positioning holes 411 can be provided on the cylinder wall of the sleeve 40, and the elastic protrusion 52 can be provided on the insertion section 54; or in other embodiments, multiple positioning holes 411 can be provided on the insertion section 54, and the elastic protrusion 52 can be provided on the cylinder wall of the sleeve 40. The elastic extension and retraction direction of the elastic protrusion 52 is perpendicular to the extension direction of the sleeve 40. During the reciprocating movement of the insertion section 54 relative to the sleeve 40, the elastic protrusion 52 can be positioned and engaged with different positioning holes 411 to achieve the adjustment of the overall length of the fixed part 4 and the telescopic part 5, that is, the telescopic adjustment structure 3. Compared with the existing structure that sets an elastic protrusion on the spring arm and engages with the positioning groove, this can reduce the probability of the adjustment positioning force of the telescopic adjustment structure being weakened due to the wear of the positioning groove, which helps to improve the adjustment reliability of the telescopic adjustment structure. Furthermore, in the telescopic adjustment structure of this application embodiment, the elastic protrusion 52 elastically extends and retracts in the direction perpendicular to the extension of the sleeve 40. Compared with the existing structure that achieves the extension and retraction of the elastic protrusion by the elastic deformation of the spring arm, this can improve the anti-aging, anti-fatigue and service life of the elastic protrusion 52, further improving the reliability of the telescopic adjustment structure.

[0034] Furthermore, in the telescopic adjustment structure 3, the sleeve 40 of the fixed part 4 and the insertion section 54 of the telescopic part 5 are guided and engaged by a guide groove 424 and a guide protrusion 532, thereby reducing the probability of jamming during the reciprocating movement of the telescopic part 5 relative to the fixed part 4 and further improving the reliability of the telescopic adjustment structure 3. In one embodiment, the guide groove 424 may be provided on the cylinder wall of the sleeve 40, and the guide protrusion 532 may be provided on the insertion section 54; or in another embodiment, the guide groove 424 may be provided on the insertion section 54, and the guide protrusion 532 may be provided on the cylinder wall of the sleeve 40.

[0035] In some embodiments, for the telescopic portion 5, please refer to... Figure 2 , Figure 3 , Figure 5 and Figure 6The telescopic part 5 includes an insert body 51 and a guide member 53. The insert body 51 and the sleeve 40 are positioned and engaged with each other through elastic protrusions 52 and multiple positioning holes 411. The guide member 53 and the sleeve 40 are guided and engaged with each other through guide grooves 424 and guide protrusions 532. The elastic protrusions 52 or positioning holes 411 can be provided on the insert body 51, and one of the guide grooves 424 and guide protrusions 532 can be located on the guide member 53. In the plane perpendicular to the extension direction of the sleeve 40, the guide member 53 can be located between the sleeve 40 wall with positioning holes 411 or elastic protrusions 52 and the insert body 51. The guide member 53 can adopt a guide plate structure and is provided with a clearance structure 531. The clearance structure 531 can avoid the elastic protrusions 52 on the sleeve 40 wall or the insert body 51 so that the elastic protrusions 52 can pass through the clearance structure 531 and be positioned and engaged with the positioning holes 411. The avoidance structure 531 on the guide member 53 can be an avoidance hole or an avoidance notch on the guide plate, and the elastic protrusion 52 can be inserted into the avoidance hole or the avoidance notch.

[0036] In other embodiments, the guide member 53 may not be provided in the telescopic part 5. Instead, the insert body 51 may be a plate-like structure arranged in the extension direction of the sleeve 40. The guide groove 424 and the guide protrusion 532 are provided between the insert body 51 and the sleeve 40 wall. The guide groove 424 and the guide protrusion 532 can guide the insert body 51 to move back and forth in the sleeve 40, thereby improving the smoothness of the reciprocating sliding of the insert body 51 and the entire telescopic part 5 relative to the fixed part 4.

[0037] In some embodiments where the telescopic portion 5 includes a guide member 53, in order to achieve a fixed connection between the insert body 51 and the guide member 53, the telescopic portion 5 may also include a first crimping assembly 56. The first crimping assembly 56 may be located outside the sleeve 40. The first crimping assembly 56 achieves a fixed connection between the insert body 51 and the guide member 53 outside the sleeve 40 in the arrangement direction of the insert body 51 and the guide member 53.

[0038] Please continue to refer to this. Figure 2 , Figure 3 and Figure 5 In one embodiment, the first crimping assembly 56 includes a crimping member 561, the insert body 51 has an outer end portion 515 located outside the sleeve 40, the outer end portion 515 of the insert body 51 is connected to the crimping member 561 by screws, the guide member 53 is located between the crimping member 561 and the insert body 51, and the guide member 53 is provided with a through hole for the screw to pass through. During the screw tightening process, the guide member 53 is crimped and fixed between the insert body 51 and the crimping member 561, so that the outer end portion 515 of the insert body 51 and the guide member 53 are fixedly connected by the crimping member 561.

[0039] In another embodiment, the first pressing assembly 56 may include two pressing members arranged at intervals in the arrangement direction of the insert body 51 and the guide 53. The two pressing members are fastened together by screws. Both the insert body 51 and the guide 53 are plate-shaped structures. The outer end 515 of the insert body 51 and the guide 53 are provided with positioning holes for the screws to pass through. During the process of locking the two pressing members with screws, the outer end 515 of the insert body 51 and the guide 53 are pressed and fixed between the two pressing members, so that the outer end 515 of the insert body 51 and the guide 53 are fixedly connected by the two pressing members.

[0040] Alternatively, in another embodiment, the first crimping assembly 56 can be omitted from the telescopic portion 5, and the outer end 515 of the insert body 51 can be directly fixedly connected to the guide member 53 by screws.

[0041] In some embodiments, the insert body 51 also has an inner end portion 511 located within the sleeve 40. Due to space constraints, the inner end portion 511 of the insert body 51 can be directly fixedly connected to the guide member 53 by screws, or the inner end portion 511 of the insert body 51 can also be snapped into the guide member 53. For example, the inner end portion 511 of the insert body 51 has a hook 512, the guide member 53 has a groove, and the avoidance hole on the guide member 53 for avoiding the elastic protrusion 52 can form a groove. The hook 512 cooperates with the groove to achieve a fixed connection between the inner end portion 511 of the insert body 51 and the guide member 53.

[0042] In some embodiments, please refer to Figure 2 , Figure 4 and Figure 6 The guide member 53 is a guide plate. The length direction of the guide plate is in the same direction as the extension direction of the sleeve 40, and the thickness direction of the guide plate is in the same direction as the arrangement direction of the guide plate and the insertion body 51. The guide plate has a width direction that is perpendicular to both the length direction and the thickness direction. Guide protrusions 532 are formed on both sides of the guide plate in the width direction. The guide protrusions 532 can cooperate with the guide grooves 424 on the inner sidewall of the sleeve 40 to realize the guide movement of the guide member 53 and the sleeve 40, that is, to realize the guide movement of the telescopic part 5 and the fixed part 4.

[0043] In other embodiments, if the thickness of the guide plate allows and the internal space of the sleeve 40 is sufficient, the guide groove 424 can also be provided on both sides of the guide plate in the width direction, and the guide protrusion 532 can be provided on the sleeve wall of the sleeve 40. Multiple guide protrusions 532 can be provided at intervals in the extension direction of the sleeve 40. Multiple guide protrusions 532 cooperate with the guide groove 424 on the guide plate to realize the guide movement of the guide member 53 and the sleeve 40, that is, to realize the guide movement of the telescopic part 5 and the fixed part 4.

[0044] In some embodiments, please refer to Figures 2 to 6 In the telescopic adjustment structure 3, the elastic protrusion 52 can be installed on the telescopic part 5, and the positioning hole 411 can be located on the cylinder wall of the sleeve 40 in the fixed part 4. In order to realize the elastic deformation of the elastic protrusion 52 in the direction perpendicular to the extension of the sleeve 40, the elastic protrusion 52 is provided to include a mounting cylinder 521, an elastic element 523 and a positioning element 524. The extension direction of the mounting cylinder 521 is perpendicular to the extension direction of the sleeve 40. It can be understood that the extension direction of the mounting cylinder 521 is perpendicular to the tangent at the position of the mounting cylinder 521 on the sleeve 40. The mounting cylinder 521 is open at one end and closed at the other end in its extension direction. The elastic element 523 includes a compression spring or a rubber spring. The positioning element 524 can be installed in the mounting cylinder 521 through the elastic element 523.

[0045] In one embodiment, one end of the elastic member 523 is connected to the positioning member 524, and the other end can be connected to the closed end of the mounting cylinder 521. Under the elastic action of the elastic member 523, the positioning member 524 can reciprocate in a direction perpendicular to the extension direction of the sleeve 40 to cooperate with the positioning hole 411.

[0046] In one embodiment, both the positioning element 524 in the elastic protrusion 52 and the sleeve 40 wall with the positioning hole 411 are made of metal. This reduces the probability of wear on the edge of the positioning hole 411 or the positioning element 524 due to friction between the positioning element 524 and the sleeve 40 wall, thereby ensuring the positioning force of the positioning element 524 and the positioning hole 411 and improving the reliability of the telescopic adjustment structure 3. In other embodiments, the positioning element 524 and the sleeve 40 wall with the positioning hole 411 can also be made of a wear-resistant plastic material to ensure the positioning force and reliability of the telescopic adjustment structure 3.

[0047] In one embodiment, please refer to Figure 2 , Figures 4 to 6 The positioning element 524 can be a positioning ball, and the positioning hole 411 is a circular hole. The diameter of the positioning ball is larger than the diameter of the positioning hole 411. In this way, under the abutment of the sleeve wall 40 and the edge of the positioning hole 411, the positioning element 524 can be prevented from falling out of the mounting sleeve 521, which helps to improve the reliability of the entire elastic protrusion 52 and the positioning hole 411. In other embodiments, the positioning element 524 can also be a cylindrical structure with one end face being arc-shaped. The positioning hole 411 can be an elliptical hole or a square hole, etc. The arc-shaped end face of the positioning element 524 is positioned and fitted with the positioning hole 411. By setting the dimensions of the positioning hole 411 and the positioning element 524, the edge of the positioning hole 411 and the sleeve wall 40 can both abut against the positioning element 524 to prevent the positioning element 524 from falling out of the mounting sleeve 521.

[0048] In one embodiment, please continue to refer to Figure 5The mounting cylinder 521 has an opening facing the positioning hole 411 in its extending direction. The cylinder wall of the mounting cylinder 521 is provided with a limiting protrusion 522 at the opening position. The limiting protrusion 522 can be an annular protrusion extending towards the inside of the mounting cylinder 521, or it can be a plurality of arc-shaped protrusions spaced apart in the circumferential direction of the mounting cylinder 521. The limiting protrusion 522 can abut against the positioning member 524 in the mounting cylinder 521 in the axial direction of the mounting cylinder 521 to prevent the positioning member 524 from falling out of the mounting cylinder 521. In this structure, the elastic element 523 may not have a direct connection with the positioning element 524 or the mounting cylinder 521. The elastic element 523 is only pressed between the closed end of the mounting cylinder 521 and the positioning element 524. During the assembly of the elastic protrusion 52, the elastic element 523 can be installed in the mounting cylinder 521 first. Under the squeezing action of external force, the positioning element 524 passes over the limiting protrusion 522 and is installed in the mounting cylinder 521 to complete the assembly of the entire elastic protrusion 52.

[0049] In one embodiment, the elastic protrusion 52 can be fixed to the insertion body 51 of the telescopic part 5 by means of a threaded connection, that is, a threaded section is provided on the cylinder wall of the mounting cylinder 521. The insertion body 51 can be a plate-shaped structure with corresponding threaded holes. The mounting cylinder 521 of the elastic protrusion 52 cooperates with the threaded holes of the insertion body 51 to realize the installation of the elastic protrusion 52 on the insertion body 51.

[0050] In one embodiment, the insert body 51 is a plate-shaped structure with a generally U-shaped cross-section. An installation protrusion 513 can also be provided on the U-shaped bottom wall of the insert body 51, and an installation groove 514 is provided on the installation protrusion 513. The elastic protrusion 52 is located entirely within the installation groove 514, and the installation cylinder 521 is interference-fitted with the groove wall of the installation groove 514 to achieve the installation and fixation of the elastic protrusion 52 on the insert body 51.

[0051] In one embodiment, please refer to Figure 3 and Figure 6 The avoidance structure 531 on the guide 53 is an avoidance hole. On the one hand, the avoidance hole can be used for the elastic protrusion 52 to pass through in order to achieve positioning and engagement with the positioning hole 411. On the other hand, the avoidance hole is set near the inner end 511 of the insertion body 51 in the extension direction of the telescopic part 5. A part of the avoidance hole can serve as a slot on the guide 53 to engage with the hook 512 on the insertion body 51 to achieve the connection between the insertion body 51 and the guide 53 at the inner end 511 of the insertion body 51.

[0052] In one embodiment, please continue to refer to Figures 2 to 6For the fixed part 4, the fixed part 4 includes an earphone headband 41 and an auxiliary beam 42, which are connected in a direction perpendicular to the extension direction of the sleeve 40 to enclose and form the sleeve 40. In an embodiment where the telescopic adjustment structure is applied to a telescopic bracket, the fixed part 4 includes two support beams that enclose and form the sleeve 40.

[0053] Specifically, both the headphone headband 41 and the auxiliary beam 42 can be configured as plate structures. The auxiliary beam 42 has a U-shaped cross-section perpendicular to its extension direction. The U-shaped opening of the auxiliary beam 42 faces the headphone headband 41. The headphone headband 41 is made of metal. Positioning holes 411 are provided on the headphone headband 41 and are spaced apart in the extension direction of the headphone headband 41. Positioning grooves 412 are provided on the edge of the headphone headband 41, and positioning protrusions 423 are provided on the corresponding auxiliary beam 42. The positioning protrusions 423 and the positioning grooves 412 are positioned and engaged to achieve the pre-positioning of the headphone headband 41 and the auxiliary beam 42.

[0054] The auxiliary beam 42 has an inner portion 421 and an outer portion 422 located at both ends of its extension direction. The inner portion 421 is away from the telescopic portion 5, and the outer portion 422 is located between the inner end 511 and the outer end 515 of the insert body 51. The inner portion 421 of the auxiliary beam 42 is connected to the headphone headband 41 by screws. The outer portion 422 of the auxiliary beam 42 is connected to the headphone headband 41 by the second crimping assembly 43, or it can also be connected by screws. The headphone headband 41 and the auxiliary beam 42 enclose to form a sleeve 40. A guide protrusion 532 or a guide groove 424 for guiding and cooperating with the guide member 53 can be provided on the corresponding U-shaped sidewall of the auxiliary beam 42, so as to facilitate the guiding and cooperating of the telescopic portion 5 and the fixed portion 4.

[0055] In one embodiment, please continue to refer to Figure 4 and Figure 5 The fixing part 4 includes a second crimping assembly 43, which is located at the outer part 422 of the auxiliary beam 42. The second crimping assembly 43 can realize the fixed connection between the headphone headband 41 and the auxiliary beam 42 at the outer part 422 of the auxiliary beam 42. The second crimping assembly 43 includes a first crimping member 431 and a second crimping member 432 connected in the arrangement direction of the headphone headband 41 and the auxiliary beam 42. The first crimping member 431 and the second crimping member 432 are connected by screws. Both the headphone headband 41 and the auxiliary beam 42 are provided with through holes or clearance notches for screws to pass through. After the first crimping member 431 and the second crimping member 432 are fixedly connected by screws, the auxiliary beam 42 and the headphone headband 41 are pressed and fixed between the first crimping member 431 and the second crimping member 432, thereby realizing the fixed connection between the headphone headband 41 and the outer part 422 of the auxiliary beam 42.

[0056] In another embodiment, the second crimping assembly 43 includes only one crimping member, which can be fixedly connected to the outer part 422 of the auxiliary beam 42 by screws. The headphone headband 41 is provided with through holes or clearance notches for screws to pass through. After the crimping member is fixedly connected to the auxiliary beam 42, the headphone headband 41 is pressed and fixed between the auxiliary beam 42 and the crimping member, thereby realizing the fixed connection between the headphone headband 41 and the auxiliary beam 42.

[0057] In some embodiments, the sleeve 40 of the fixed part 4 has an open end corresponding to the outer part 422 of the auxiliary beam 42 in its extending direction, and the telescopic part 5 passes through the opening at the end of the sleeve 40. The insertion section 54 on the telescopic part 5 can abut against the open end of the sleeve 40 in the extending direction of the sleeve 40 to restrict the telescopic part 5 from coming out of the sleeve 40.

[0058] Specifically, the insertion section 54 includes a first section 541 and a second section 542 arranged in the extending direction of the sleeve 40. The second section 542 connects the first section 541 and the external end 55. The cross-sectional shape of the first section 541 and the second section 542 in the extending direction of the sleeve 40 is generally T-shaped, and the cross-sectional dimension of the first section 541 is larger than that of the second section 542. The second crimping assembly 43 has an end facing the first crimping assembly 56 in the extending direction of the sleeve 40. The opening shape formed by the second crimping assembly 43 at this end is similar to that of the second section 541. The cross-sectional shape of 542 is matched so that the second segment 542 can be reciprocated and inserted into the second crimping assembly 43. Since the cross-sectional shape of the first segment 541 is larger than that of the second segment 542, that is, the cross-sectional shape of the first segment 541 is larger than that of the opening formed by the second crimping assembly 43 at the end, the first segment 541 can abut against the second crimping assembly 43 in the extension direction of the sleeve 40, so as to restrict the first segment 541 from coming out of the opening end of the sleeve 40, that is, to restrict the separation of the telescopic part 5 from the fixed part 4.

[0059] In one embodiment, a limiting protrusion facing the insertion section 54 can be provided on the headphone headband 41 or the auxiliary beam 42, and a long groove or long hole that guides and cooperates with the limiting protrusion can be provided on the insertion body 51 or the guide member 53. The long groove or long hole extends in the extension direction of the sleeve 40, and the limiting protrusion can move in the long groove or long hole along the length direction of the long groove or long hole, so as to satisfy that the telescopic part 5 can reciprocate and move relative to the fixed part 4. The end sidewall of the long groove or long hole abuts against the limiting protrusion in the extension direction of the sleeve 40 to restrict the telescopic part 5 from coming out of the opening end of the fixed part 4.

[0060] This application also provides an earphone, please refer to... Figure 1The headphones are over-ear headphones, which include headphone heads 1 and telescopic beams 2. There are two headphone heads 1, which are respectively connected to the two ends of the telescopic beams 2. The telescopic beams 2 include telescopic adjustment structures 3 as described in any of the above embodiments. There may be two telescopic adjustment structures 3 on the telescopic beams 2, which are arranged at the two ends of the telescopic beams 2. The telescopic part 5 of the telescopic adjustment structure 3 has an external end 55 located outside the sleeve 40. The external end 55 is connected to the headphone heads 1. The headphone heads 1 contain a sound-generating unit.

[0061] The telescopic beam 2 is covered with sponge to improve the user's wearing comfort. When the headphones are worn, the telescopic beam 2 spans across the user's head, and the headphone head 1 is close to the user's ear. The size of the telescopic adjustment structure 3, that is, the overall size of the telescopic beam 2, can be adjusted by adjusting the size of the telescopic adjustment structure 3 to adapt to different users' head sizes, thereby improving the overall compatibility of the headphones.

[0062] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A telescopic adjustment structure, characterized in that, include: The fixed part has a sleeve; A telescopic portion is arranged in the extending direction of the sleeve, and a portion of the telescopic portion is reciprocally inserted into the sleeve. One of the sleeve and the telescopic part has a plurality of positioning holes spaced apart in the extension direction of the sleeve, and the other has an elastic protrusion that positions and engages with the positioning holes. The elastic extension direction of the elastic protrusion is perpendicular to the extension direction of the sleeve. One of the sleeve and the telescopic part has a guide groove, and the other has a guide protrusion that engages with the guide groove. The guide groove is arranged in the extension direction of the sleeve.

2. The telescopic adjustment structure as described in claim 1, characterized in that, The telescopic portion includes an insert body and a guide member. The elastic protrusion or the positioning hole is located on the insert body. The guide member has a clearance structure for the elastic protrusion to pass through. One of the guide groove and the guide protrusion is located on the guide member.

3. The telescopic adjustment structure as described in claim 2, characterized in that, The telescopic portion includes a first crimping assembly located outside the sleeve. In the arrangement direction of the insert body and the guide, the first crimping assembly achieves a fixed connection between the insert body and the guide outside the sleeve.

4. The telescopic adjustment structure as described in claim 3, characterized in that, The first crimping assembly includes a crimping member connected to the insert body, and the guide member is crimped and fixed between the crimping member and the insert body.

5. The telescopic adjustment structure as described in claim 2, characterized in that, The elastic protrusion includes a mounting cylinder, an elastic element, and a positioning element. The positioning element is reciprocally mounted in the mounting cylinder via the elastic element, and the positioning element cooperates with the positioning hole.

6. The telescopic adjustment structure as described in claim 5, characterized in that, The positioning element is a positioning ball, and the positioning hole is a circular hole, wherein the diameter of the positioning ball is larger than the diameter of the positioning hole.

7. The telescopic adjustment structure as described in claim 5, characterized in that, The mounting cylinder has an opening facing the positioning hole in its extending direction, and a limiting protrusion is provided on the cylinder wall of the mounting cylinder. The limiting protrusion abuts against the positioning member in the extending direction of the mounting cylinder to prevent the positioning member from dislodging from the opening of the mounting cylinder.

8. The telescopic adjustment structure as described in any one of claims 1 to 7, characterized in that, The fixed part includes an earphone headband and an auxiliary beam. The earphone headband and the auxiliary beam are connected to form the sleeve. The guide protrusion or the guide groove is provided on the auxiliary beam.

9. The telescopic adjustment structure as described in claim 8, characterized in that, The sleeve has an open end at one end in its extending direction for the telescopic portion to extend out; the fixing portion includes a second crimping assembly, which fixes the headband and the auxiliary beam at the open end; the open end abuts against the telescopic portion to prevent the telescopic portion from disengaging from the sleeve.

10. The telescopic adjustment structure as described in claim 9, characterized in that, The second crimping assembly includes a first crimping member and a second crimping member connected in the arrangement direction of the headphone headband and the auxiliary beam, wherein the headphone headband and the auxiliary beam are clamped and fixed between the first crimping member and the second crimping member.

11. An earphone, characterized in that, The device includes an earphone head and a telescopic beam, wherein the telescopic beam includes a telescopic adjustment structure as described in any one of claims 1 to 10, the telescopic portion having an external end located outside the sleeve, and the earphone head being connected to the external end.

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