Headband and head-mounted device

Abstract

The present invention discloses a headband and a head-mounted device. The headband includes a first bracket, a second bracket, a rotating shaft spring, and an adjusting assembly. The first bracket has a first rotating end, and the second bracket has a second rotating end. The second rotating end is movably connected to the first rotating end so that the second bracket and the first bracket enclose a wearing space. A rotating cavity is formed by the cooperation between the first rotating end and the second rotating end. The rotating shaft spring is movably disposed in the rotating cavity. The rotating shaft spring has an adjusting cavity, and the rotating shaft spring is further provided with elastic arms extending respectively toward both sides of the adjusting cavity. The two elastic arms are elastically connected to the first rotating end and the second rotating end respectively. The adjusting assembly movably penetrates through the adjusting cavity, and the adjusting assembly adjusts the size of the adjusting cavity to adjust the size of the wearing space. The headband of the present invention adjusts the size of the wearing space to meet long-term wearing and improve comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of head-mounted devices, and particularly to a head-mounted head beam and a head-mounted device applying the head-mounted head beam. Background Art

[0002] Headphones are widely accepted by young people for their good sound field, non-in-ear design, and avoiding abrasion of the ear canal. In related technologies, the head beam of the headphones is an independent and complete integral structure, and the head beam is clamped by relying on the deformation of the material and the deformation of the internal elastic sheet. The extrusion position is unchangeable and the clamping force cannot be changed, resulting in single-point extrusion on the top of the head for a long time during wearing, which is uncomfortable. Summary of the Invention

[0003] The main object of the present invention is to provide a head-mounted head beam and a head-mounted device, aiming to adjust the size of the wearing space, so as to adjust the extrusion position on the top of the head caused by wearing, to meet long-term wearing and improve comfort.

[0004] To achieve the above object, the present invention provides a head-mounted head beam, which includes:

[0005] A first bracket having a first rotating end;

[0006] A second bracket having a second rotating end, the second rotating end being movably connected to the first rotating end, so that the second bracket and the first bracket enclose a wearing space, and a rotating cavity is formed by the cooperation between the first rotating end and the second rotating end;

[0007] A rotating shaft spring movably disposed in the rotating cavity, the rotating shaft spring having an adjusting cavity, and the rotating shaft spring is further provided with elastic arms extending towards both sides of the adjusting cavity respectively, and the two elastic arms are elastically connected to the first rotating end and the second rotating end respectively; and

[0008] An adjusting assembly movably penetrating through the adjusting cavity, the adjusting assembly adjusting the size of the adjusting cavity to adjust the size of the wearing space.

[0009] In one embodiment, the adjusting assembly includes a sub-shaft and a mother shaft movably penetrating through the adjusting cavity;

[0010] The adjusting assembly has a first state in which the sub-shaft and the mother shaft are mutually attached and cooperate to form a cylinder, and a second state in which at least one side of the sub-shaft and the mother shaft is opened and they are separated from each other;

[0011] In the first state, the inner wall of the adjusting cavity is attached to the outer wall of the cylinder, so that the two elastic arms form a first included angle;

[0012] In the second state, the inner wall of the adjustment cavity abuts against the outer walls of part of the sub-shaft and part of the main shaft, causing the two elastic arms to form a second included angle;

[0013] Wherein, the second included angle is greater than the first included angle, and the cross-sectional area of the adjustment cavity in the first state is smaller than the cross-sectional area of the adjustment cavity in the second state.

[0014] In one embodiment, the main shaft has a connected first arc surface and a first abutting surface, the sub-shaft has a connected second arc surface and a second abutting surface, and one of the first abutting surface and the second abutting surface is convex with an arc-shaped protrusion, and the other of the two is concave with an arc-shaped groove;

[0015] In the first state, the arc-shaped protrusion is received in the arc-shaped groove, and the first abutting surface is in abutting contact with the second abutting surface, so that the first arc surface and the second arc surface cooperate to form the circumferential surface of the cylinder;

[0016] In the second state, part of the arc-shaped protrusion is received in the arc-shaped groove, and one side of the first abutting surface and the second abutting surface away from the arc-shaped protrusion and the arc-shaped groove are away from each other.

[0017] In one embodiment, the arc-shaped protrusion is convexly provided on one side of the first abutting surface adjacent to the first arc surface, the arc-shaped protrusion extends along the extension direction of the main shaft, the arc-shaped protrusion is smoothly connected to the first arc surface in a transitional manner, and the arc-shaped protrusion and the first abutting surface cooperate to form a first stop surface;

[0018] The arc-shaped groove is concavely provided on one side of the second abutting surface adjacent to the second arc surface, and the arc-shaped groove and the second abutting surface cooperate to form a second stop surface;

[0019] In the first state, the first stop surface is in abutting contact with the second stop surface; in the second state, the first stop surface and the second stop surface are away from each other.

[0020] In one embodiment, an adjustment plate is provided at one end of the sub-shaft, a stop protrusion is provided at one end of the arc-shaped groove away from the adjustment plate, a pressing plate is provided on the main shaft away from the adjustment plate, and a stop groove is provided at one end of the arc-shaped protrusion connecting the pressing plate. When the arc-shaped protrusion is received in the arc-shaped groove, the stop protrusion is received in the stop groove;

[0021] The stop protrusion is connected to the groove wall of the stop groove through a limiting structure to limit the relative positions of the sub-shaft and the main shaft, so that the sub-shaft and the main shaft are in the first state or the second state.

[0022] In one embodiment, the limiting structure includes a limiting protrusion and a limiting groove. One of the limiting protrusion and the limiting groove is disposed on the side of the stopping protrusion facing the adjusting plate, and the other of the two is disposed on the side of the wall of the stopping groove facing the pressing plate.

[0023] Wherein, when pressing the pressing plate, the arc-shaped protrusion moves along the arc-shaped groove, so that the stopping protrusion moves within the stopping groove, so that the limiting protrusion is clamped or disengaged from the limiting groove.

[0024] In one embodiment, there are a plurality of the limiting grooves, and the plurality of limiting grooves are arranged at intervals along the side wall of the stopping groove or the side of the stopping protrusion facing the adjusting plate.

[0025] And / or, a guiding protrusion protrudes from the bottom wall of the stopping groove, and the extending direction of the guiding protrusion is the same as the extending direction of the arc-shaped protrusion. The stopping protrusion is correspondingly recessed with a guiding groove for the guiding protrusion, and the guiding protrusion is in sliding fit with the guiding groove.

[0026] In one embodiment, a pressing groove is provided corresponding to the pressing plate at the first rotating end or the second rotating end. A through hole communicating with the rotating cavity is provided at the bottom wall of the pressing groove, and the through hole is correspondingly communicated with the adjusting cavity.

[0027] The pressing plate is located in the pressing groove, and one end of the female shaft away from the pressing plate passes through the through hole and extends into the adjusting cavity.

[0028] The adjusting assembly further includes a return spring located in the pressing groove. The return spring is sleeved on one end of the female shaft adjacent to the pressing plate, and two ends of the return spring are elastically abutted against the pressing plate and the bottom wall of the pressing groove respectively.

[0029] In one embodiment, a first limiting surface is provided on the side wall of the pressing groove, and a second limiting surface is provided on the periphery of the pressing plate. The first limiting surface and the second limiting surface are in sliding abutment to limit the rotation of the pressing plate around the axial direction of the female shaft.

[0030] And / or, a receiving groove is provided corresponding to the adjusting plate at the first rotating end or the second rotating end. The receiving groove communicates with the rotating cavity and corresponds to the adjusting cavity. The adjusting plate is movably limited in the receiving groove, and one end of the sub-shaft away from the adjusting plate passes through the receiving groove and extends into the adjusting cavity.

[0031] And / or, an adjusting groove is provided on the side of the adjusting plate facing away from the sub-shaft.

[0032] And / or, in the second state, the included angle formed by the plane where the first stopping surface is located and the plane where the second stopping surface is located is less than 60°.

[0033] In one embodiment, a rotation groove is provided on one side of the first rotation end facing the second rotation end, a rotation protrusion is provided on one side of the second rotation end facing the first rotation end, and a receiving groove is provided on the rotation protrusion;

[0034] The rotation protrusion is received in the rotation groove, so that the receiving groove and the rotation groove cooperate to form the rotation cavity, and the two elastic arms are elastically connected to the groove wall of the rotation groove and the groove wall of the receiving groove respectively.

[0035] In one embodiment, a first limiting hole is provided on the bottom wall of the rotation groove, a second limiting hole is provided on the bottom wall of the receiving groove, one elastic arm extends into the first limiting hole, and the other elastic arm extends into the second limiting hole;

[0036] And / or, through holes communicating with the rotation cavity are respectively formed on opposite side walls of the rotation groove and the receiving groove, and both ends of the adjusting component extend out of the adjusting cavity and are movably disposed through the through holes;

[0037] And / or, the head-mounted head beam further includes a foam, and the foam is disposed on one side of the second bracket and the first bracket facing the wearing space.

[0038] The present invention further provides a head-mounted device, including a device main body and the above-mentioned head-mounted head beam, and the device main body is connected to one ends of the first bracket and the second bracket of the head-mounted head beam that are far away from each other.

[0039] The head-mounted head beam of the technical solution of the present invention is provided with two parts of a first bracket and a second bracket, so that the first rotation end of the first bracket is movably connected to the second rotation end of the second bracket, thereby using the first bracket and the second bracket to enclose a wearing space to facilitate the wearing of the head-mounted head beam by the user's head; by cooperating to form a rotation cavity between the first rotation end and the second rotation end, and movably disposing the rotating shaft spring in the rotation cavity, so that the two elastic arms of the rotating shaft spring are elastically connected to the first rotation end and the second rotation end respectively, thereby using the rotating shaft spring to improve the elastic clamping force on the first bracket and the second bracket of the head-mounted head beam, so as to facilitate the user's head to be clamped in the wearing space; further by providing an adjusting cavity on the rotating shaft spring and movably disposing the adjusting component in the adjusting cavity of the rotating shaft spring, thereby adjusting the size of the adjusting cavity through the adjusting component to adjust the included angle position of the two elastic arms of the rotating shaft spring, so as to realize adjusting the size of the wearing space formed by the first bracket and the second bracket, so that the head-mounted head beam can be conveniently suitable for the head sizes of different users, and can also adjust the extrusion position on the top of the head caused by the user's long-term wearing to improve comfort. Description of the Drawings

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0041] Figure 1 Structural schematic diagram of a headband in an embodiment of the present invention;

[0042] Figure 2 Exploded schematic diagram of a headband in an embodiment of the present invention;

[0043] Figure 3 Cross-sectional schematic diagram of a headband in an embodiment of the present invention;

[0044] Figure 4 Structural schematic diagram of a headband in a first state in an embodiment of the present invention;

[0045] Figure 5 For Figure 4 Partial cross-sectional schematic diagram;

[0046] Figure 6 Structural schematic diagram of a headband in a second state in an embodiment of the present invention;

[0047] Figure 7 For Figure 6 Partial cross-sectional schematic diagram;

[0048] Figure 8 Partial structural schematic diagram of a first bracket in an embodiment of the present invention;

[0049] Figure 9 Partial structural schematic diagram of a second bracket in an embodiment of the present invention;

[0050] Figure 10 Structural schematic diagram of a rotating shaft spring in an embodiment of the present invention;

[0051] Figure 11 Structural schematic diagram of a female shaft in an embodiment of the present invention;

[0052] Figure 12 Structural schematic diagram of a male shaft in an embodiment of the present invention.

[0053] Explanation of the reference numerals in the drawings:

[0054]

[0055]

[0056] The realization, functional features, and advantages of the present invention will be further described in conjunction with embodiments with reference to the accompanying drawings. Detailed Embodiment

[0057] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0058] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0059] At the same time, the meaning of "and / or" or "and / or" that appears throughout the text is that it includes three scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously.

[0060] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0061] Head-mounted headphones are widely accepted by young people for their good sound field, non-ear-in design, and the advantage of avoiding abrasion of the ear canal. In related technologies, the head beam of a head-mounted headphone is an independent and complete integral structure, and the clamping of the head beam is achieved by relying on the deformation of the material and the deformation of the internal elastic sheet. The extrusion position is immutable, and the clamping force cannot be changed, resulting in single-point extrusion on the top of the head during long-term wearing, which is uncomfortable.

[0062] Based on the above concepts and problems, the present invention proposes a head-mounted head beam 100. It can be understood that the head-mounted head beam 100 is applied to a head-mounted device, and the head-mounted device can be a head-mounted headphone or a head-mounted VR device, etc. Of course, it can also be other head-mounted devices, which are not limited here. In this embodiment, the head-mounted head beam of a head-mounted headphone is taken as an example for description.

[0063] Please refer to Figures 1 to 10As shown, in the embodiment of the present invention, the head-mounted head beam 100 includes a first bracket 1, a second bracket 2, a rotating shaft spring 4, and an adjusting assembly 5. Among them, the first bracket 1 has a first rotating end 11, the second bracket 2 has a second rotating end 21, and the second rotating end 21 is movably connected to the first rotating end 11 so that the second bracket 2 and the first bracket 1 enclose a wearing space 3. A rotating cavity 25 is formed by the cooperation between the first rotating end 11 and the second rotating end 21. The rotating shaft spring 4 is movably disposed in the rotating cavity 25. The rotating shaft spring 4 has an adjusting cavity 41, and the rotating shaft spring 4 is further provided with elastic arms 42 extending respectively towards both sides of the adjusting cavity 41. The two elastic arms 42 are respectively elastically connected to the first rotating end 11 and the second rotating end 21. The adjusting assembly 5 movably penetrates through the adjusting cavity 41, and the adjusting assembly 5 adjusts the size of the adjusting cavity 41 to adjust the size of the wearing space 3.

[0064] In this embodiment, the first bracket 1 and the second bracket 2 of the head-mounted head beam 100 form the wearing main body of the head-mounted head beam 100. In order to facilitate the adaptation or wearing of the head-mounted head beam 100 to the user's head, the wearing space 3 formed by the first bracket 1 and the second bracket 2 is similar to the shape of the user's head. It can be understood that the first bracket 1 and the second bracket 2 are arranged in an arc structure, that is, one end of the first bracket 1 and the second bracket 2 is movably connected, and the other end is curved in an arc shape towards the direction away from each other, so that the second bracket 2 and the first bracket 1 enclose a wearing space 3.

[0065] It can be understood that the sides of the first bracket 1 and the second bracket 2 facing the wearing space 3 are arranged as concave arc surfaces, and the sides of the first bracket 1 and the second bracket 2 facing away from the wearing space 3 are arranged as convex arc surfaces. Optionally, the parts of the first bracket 1 and the second bracket 2 other than the first rotating end 11 and the second rotating end 21 are symmetrically arranged.

[0066] In this embodiment, one end of the two ends of the first bracket 1 forms the first rotating end 11, and the other end forms a first connection end for connecting with an earphone or a VR main body. One end of the two ends of the second bracket 2 forms the second rotating end 21, and the other end forms a second connection end for connecting with an earphone or a VR main body. In this way, the first bracket 1 and the second bracket 2 are connected through the first rotating end 11 and the second rotating end 21, so that the first bracket 1 and the second bracket 2 enclose a wearing space 3, and an opening communicating with the wearing space 3 is formed between the first connection end and the second connection end.

[0067] It can be understood that, in order to adjust the size of the wearing space 3, the second rotating end 21 is movably connected to the first rotating end 11. In order to enable the wearing space 3 formed by the first bracket 1 and the second bracket 2 to have a certain clamping force, so that when the user wears the head beam 100, the wearing space 3 clamps the user's head to prevent it from falling, etc. In this embodiment, a rotating cavity 25 is formed by the cooperation between the first rotating end 11 and the second rotating end 21. By arranging a rotating shaft spring 4 in the rotating cavity 25, the two elastic arms 42 are elastically connected to the first rotating end 11 and the second rotating end 21 respectively, so as to provide a clamping force for the first bracket 1 and the second bracket 2 by the cooperation of the rotating shaft spring 4 and the two elastic arms 42.

[0068] It should be noted that, in order to install and fix the rotating shaft spring 4, the rotating shaft spring 4 can be sleeved on the support shaft, so that the support shaft is rotatably connected to the first rotating end 11 and the second rotating end 21, and no limitation is made here.

[0069] In this embodiment, the rotating shaft spring 4 has an adjusting cavity 41, and the two elastic arms 42 are connected to the outer wall of the adjusting cavity 41 and extend toward both sides of the adjusting cavity 41. It can be understood that, in order to facilitate the adjustment of the size of the adjusting cavity 41 while realizing the adjustment of the included angle between the two elastic arms 42 to realize the adjustment of the size of the wearing space 3, that is, to realize the adjustment of the opening size between the first connecting end of the first bracket 1 and the second connecting end of the second bracket 2, the adjusting cavity 41 is formed by enclosing one end of the two elastic arms 42, that is, one end of the two elastic arms 42 is connected to form a circular space, and the other ends of the two elastic arms 42 cross each other and are far away.

[0070] It can be understood that by arranging an adjusting component 5, the adjusting component 5 movably penetrates through the adjusting cavity 41 and is movably connected to the first rotating end 11 and the second rotating end 21, so as to use the adjusting component 5 to provide a support shaft for the rotating shaft spring 4 and use the adjusting component 5 to provide a rotating support shaft for the first rotating end 11 and the second rotating end 21.

[0071] In this embodiment, by adjusting the size of the adjusting cavity 41 through the adjusting component 5, the size of the wearing space 3 can be adjusted, that is, the opening size between the first connecting end of the first bracket 1 and the second connecting end of the second bracket 2 can be adjusted. It can be understood that the adjusting component 5 can expand or contract the cross section of the adjusting cavity 41 to realize the adjustment of the included angle size between the two elastic arms 42.

[0072] The head beam 100 of the present invention is provided with two parts of a first bracket 1 and a second bracket 2, so that the first rotating end 11 of the first bracket 1 is movably connected to the second rotating end 21 of the second bracket 2, thereby using the first bracket 1 and the second bracket 2 to enclose a wearing space 3, so as to facilitate the wearing space 3 of the head beam 100 to be worn on the user's head; by forming a rotating cavity 25 between the first rotating end 11 and the second rotating end 21, and movably arranging a rotating shaft spring 4 in the rotating cavity 25, so that two elastic arms 42 of the rotating shaft spring 4 are elastically connected to the first rotating end 11 and the second rotating end 21 respectively, thereby using the rotating shaft spring 4 to improve the elastic clamping force on the first bracket 1 and the second bracket 2 of the head beam 100, so that the user's head can be clamped in the wearing space 3; further, by arranging an adjusting cavity 41 on the rotating shaft spring 4, and movably penetrating an adjusting component 5 into the adjusting cavity 41 of the rotating shaft spring 4, thereby adjusting the size of the adjusting cavity 41 through the adjusting component 5, so as to adjust the included angle position of the two elastic arms 42 of the rotating shaft spring 4, thereby realizing the adjustment of the size of the wearing space 3 formed by the first bracket 1 and the second bracket 2. In this way, the head beam 100 can be conveniently adapted to the head sizes of different users, and the extrusion position on the top of the head caused by the user's long-term wearing can be adjusted to improve comfort.

[0073] In one embodiment, the adjusting component 5 includes a sub-shaft 52 and a mother-shaft 51 that are movably penetrated into the adjusting cavity 41; the adjusting component 5 has a first state in which the sub-shaft 52 and the mother-shaft 51 are mutually attached and cooperate to form a cylinder, and a second state in which at least one side of the sub-shaft 52 and the mother-shaft 51 is opened and separated from each other; in the first state, the inner wall of the adjusting cavity 41 is attached to the outer wall of the cylinder, so that the two elastic arms 42 form a first included angle; in the second state, the inner wall of the adjusting cavity 41 abuts against the outer walls of part of the sub-shaft 52 and part of the mother-shaft 51, so that the two elastic arms 42 form a second included angle; wherein, the second included angle is greater than the first included angle, and the cross-sectional area of the adjusting cavity 41 in the first state is smaller than the cross-sectional area of the adjusting cavity 41 in the second state.

[0074] In this embodiment, as Figure 2 、 Figure 3 、 Figure 5 、 Figure 7 、 Figure 11 and Figure 12 shown, by setting the adjusting component 5 as two parts of a sub-shaft 52 and a mother-shaft 51, the sub-shaft 52 and the mother-shaft 51 are simultaneously movably penetrated into the adjusting cavity 41, thereby providing a support shaft structure for the rotating shaft spring 4, and the sub-shaft 52 and the mother-shaft 51 are rotationally connected to the first rotating end 11 and the second rotating end 21, so as to provide a rotating support shaft for the first rotating end 11 and the second rotating end 21.

[0075] It can be understood that the sub-axis 52 and the mother-axis 51 of the adjusting assembly 5 can move relative to each other, so that the adjusting assembly 5 has a first state in which the sub-axis 52 and the mother-axis 51 fit together to form a cylinder, and a second state in which at least one side of the sub-axis 52 and the mother-axis 51 is opened and they move away from each other. In this way, when the adjusting assembly 5 is in the first state, the inner wall of the adjusting cavity 41 fits against the outer wall of the cylinder formed by the sub-axis 52 and the mother-axis 51. At this time, the cross-section or diameter of the adjusting cavity 41 is the smallest, and in this state, the two elastic arms 42 form a first included angle. When the adjusting assembly 5 is in the second state, at least one side of the sub-axis 52 and the mother-axis 51 is opened and they move away from each other, so as to push the inner wall of the adjusting cavity 41 to expand and become larger. At this time, a part of the inner wall of the adjusting cavity 41 abuts against the outer walls of a part of the sub-axis 52 and a part of the mother-axis 51. At this time, the cross-section or diameter of the adjusting cavity 41 is larger than the cross-section or diameter of the adjusting cavity 41 in the first state, so that the two elastic arms 42 form a second included angle.

[0076] In this embodiment, the second included angle is greater than the first included angle, that is, the cross-sectional area of the adjusting cavity 41 in the first state is smaller than the cross-sectional area of the adjusting cavity 41 in the second state. It can be understood that in the first state, the angle range of the first included angle formed by the two elastic arms 42 is greater than 90° and less than 180°. In the second state, the angle range of the second included angle formed by the two elastic arms 42 is greater than 90° and less than 180°, and the second included angle is greater than the first included angle.

[0077] Optionally, the angle of the first included angle is 100°, 110°, 120°, 130°, 140°, 150°, 160°, etc., which are not limited herein. The angle of the second included angle is 110°, 120°, 130°, 140°, 150°, 160°, 170°, etc., which are not limited herein.

[0078] In one embodiment, the mother-axis 51 has a connected first arc surface 511 and a first abutting surface, the sub-axis 52 has a connected second arc surface 521 and a second abutting surface, and one of the first abutting surface and the second abutting surface is convexly provided with an arc-shaped protrusion 513, and the other of the two is concavely provided with an arc-shaped groove 523; in the first state, the arc-shaped protrusion 513 is received in the arc-shaped groove 523, and the first abutting surface is in abutting contact with the second abutting surface, so that the first arc surface 511 and the second arc surface 521 cooperate to form the circumferential surface of a cylinder; in the second state, a part of the arc-shaped protrusion 513 is received in the arc-shaped groove 523, and the sides of the first abutting surface and the second abutting surface away from the arc-shaped protrusion 513 and the arc-shaped groove 523 move away from each other.

[0079] In this embodiment, as Figure 2 , Figure 3 , Figure 5 , Figure 7 , Figure 11 and Figure 12As shown, both ends of the mother shaft 51 and the child shaft 52 pass through the adjustment cavity 41 and are rotatably connected to the first rotating end 11 and the second rotating end 21 respectively. For example, hole shaft connection or other connecting parts can be used to achieve the rotational connection, etc., which is not limited here. By setting the mother shaft 51 as the connected first arc surface 511 and the first abutting surface, and setting the child shaft 52 as the connected second arc surface 521 and the second abutting surface, when the mother shaft 51 and the child shaft 52 are in the first state, the first arc surface 511 of the mother shaft 51 and the second arc surface 521 of the child shaft 52 cooperate to form the circumferential surface of a cylinder. At this time, the adjustment cavity 41 of the rotating shaft spring 4 is completely attached to the first arc surface 511 and the second arc surface 521.

[0080] It can be understood that by protruding an arc-shaped protrusion 513 on one of the first abutting surface and the second abutting surface, and recessing an arc-shaped groove 523 in the other one, and using the arc-shaped protrusion 513 to be movably received in the arc-shaped groove 523, that is, the arc-shaped protrusion 513 moves relative to the arc-shaped groove 523, so that the first abutting surface and the second abutting surface are in mutual contact and abutment or move away from each other, thereby enabling the mother shaft 51 and the child shaft 52 to switch between the first state and the second state.

[0081] It should be noted that in the second state, part of the arc-shaped protrusion 513 is received in the arc-shaped groove 523, and the sides of the first abutting surface and the second abutting surface away from the arc-shaped protrusion 513 and the arc-shaped groove 523 move away from each other. That is, the arc-shaped protrusion 513 and the arc-shaped groove 523 can realize the mutual rotation of the mother shaft 51 and the child shaft 52.

[0082] In an embodiment, an arc-shaped protrusion 513 protrudes from the side of the first abutting surface adjacent to the first arc surface 511. The arc-shaped protrusion 513 extends along the extension direction of the mother shaft 51. The arc-shaped protrusion 513 is smoothly connected to the first arc surface 511 in a smooth transition, and the arc-shaped protrusion 513 and the first abutting surface cooperate to form a first stop surface 514; an arc-shaped groove 523 is recessed on the side of the second abutting surface adjacent to the second arc surface 521. The arc-shaped groove 523 and the second abutting surface cooperate to form a second stop surface 524; in the first state, the first stop surface 514 is in contact and abutment with the second stop surface 524; in the second state, the first stop surface 514 and the second stop surface 524 move away from each other.

[0083] As Figure 2 、 Figure 5 、 Figure 7 、 Figure 11 and Figure 12 As shown, the first arc surface 511 is smoothly connected to the side of the arc-shaped protrusion 513 away from the first stop surface 514 in a smooth transition. The arc-shaped groove 523 is recessed in the second abutting surface, so that the arc-shaped groove 523 and the second abutting surface cooperate to form a second stop surface 524, that is, the notch of the arc-shaped groove 523 and the second stop surface 524 are both located on the second abutting surface.

[0084] In one embodiment, an adjusting plate 525 is provided at one end of the sub-axis 52, a stop projection 526 is provided at one end of the arc-shaped groove 523 away from the adjusting plate 525, a pressing plate 515 is provided at the end of the mother axis 51 away from the adjusting plate 525, and a stop groove 516 is provided at one end of the arc-shaped projection 513 connecting the pressing plate 515. When the arc-shaped projection 513 is received in the arc-shaped groove 523, the stop projection 526 is received in the stop groove 516; the stop projection 526 is connected to the groove wall of the stop groove 516 through a limiting structure to limit the relative positions of the sub-axis 52 and the mother axis 51, so that the sub-axis 52 and the mother axis 51 are in a first state or a second state.

[0085] In this embodiment, as Figure 2 , Figure 11 and Figure 12 shown, by respectively providing an adjusting plate 525 and a stop projection 526 at both ends of the sub-axis 52, and respectively providing a pressing plate 515 and a stop groove 516 at both ends of the mother axis 51, so that the stop projection 526 is connected to the groove wall of the stop groove 516 through a limiting structure to limit the relative positions of the sub-axis 52 and the mother axis 51, so that the sub-axis 52 and the mother axis 51 are in a first state or a second state.

[0086] It can be understood that the stop projection 526 is located at one end of the arc-shaped groove 523 away from the adjusting plate 525, and the stop projection 526 is flush with the second stop surface 524. The rotation adjustment of the sub-axis 52 can be realized through the adjusting plate 525 of the sub-axis 52 to adjust the mutual connection and positional relationship between the sub-axis 52 and the mother axis 51. By adjusting the relationship between the limiting structure and the stop projection 526 and the stop groove 516 through the pressing plate 515, the clamping or release of the stop projection 526 and the stop groove 516 can be realized.

[0087] In this embodiment, in the second state, the included angle formed by the plane where the first stop surface 514 is located and the plane where the second stop surface 524 is located is less than 60°. It can be understood that when the first stop surface 514 and the second stop surface 524 are separated and away from each other, an included angle is formed between the plane where the first stop surface 514 is located and the plane where the second stop surface 524 is located, and the range of this included angle is greater than 0° and less than or equal to 60°. Optionally, this included angle is 5°, 8°, 10°, 13°, 15°, 18°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 60°, etc., which are not limited here.

[0088] In one embodiment, the limiting structure includes a limiting protrusion 527 and a limiting groove 517. One of the limiting protrusion 527 and the limiting groove 517 is provided on the side of the stopping protrusion 526 facing the adjusting plate 525, and the other is provided on the side of the wall of the stopping groove 516 facing the pressing plate 515. Wherein, when the pressing plate 515 is pressed, the arc-shaped protrusion 513 moves along the arc-shaped groove 523, so that the stopping protrusion 526 moves within the stopping groove 516, so that the limiting protrusion 527 is clamped or disengaged from the limiting groove 517.

[0089] In this embodiment, as Figure 2 , Figure 11 and Figure 12 shown, by respectively providing a limiting protrusion 527 and a limiting groove 517 on the side of the stopping protrusion 526 facing the adjusting plate 525 and on the side of the wall of the stopping groove 516 facing the pressing plate 515, and using the limiting protrusion 527 to be clamped or disengaged from the limiting groove 517, the sub-shaft 52 and the mother shaft 51 are locked or released through the cooperation of the stopping protrusion 526 and the stopping groove 516, so as to facilitate the rotation adjustment of the sub-shaft 52 through the adjusting plate 525 of the sub-shaft 52, so as to adjust the mutual connection and positional relationship between the sub-shaft 52 and the mother shaft 51, so that the sub-shaft 52 and the mother shaft 51 are in the first state and the second state.

[0090] It can be understood that the limiting protrusion 527 protrudes from the side of the stopping protrusion 526 facing the adjusting plate 525, and the limiting groove 517 is recessed on the side of the wall of the stopping groove 516 facing the pressing plate 515. Of course, the limiting protrusion 527 can also protrude from the side of the wall of the stopping groove 516 facing the pressing plate 515, and the limiting groove 517 is recessed on the side of the stopping protrusion 526 facing the adjusting plate 525. Or, a limiting protrusion 527 and a limiting groove 517 are simultaneously provided on the side of the stopping protrusion 526 facing the adjusting plate 525, and a limiting groove 517 and a limiting protrusion 527 are provided on the side of the wall of the stopping groove 516 facing the pressing plate 515. At this time, the limiting protrusion 527 and the limiting groove 517 are arranged in reverse on the side of the stopping protrusion 526 facing the adjusting plate 525 and on the side of the wall of the stopping groove 516 facing the pressing plate 515, and the limiting groove 517 includes a plurality of.

[0091] In one embodiment, the limiting groove 517 includes a plurality of, and the plurality of limiting grooves 517 are arranged at intervals along the side wall of the stopping groove 516 or the side of the stopping protrusion 526 facing the adjusting plate 525. It can be understood that, as Figure 11 shown, the limiting groove 517 is recessed on the side wall of the stopping groove 516, and the plurality of limiting grooves 517 are arranged at intervals on the side wall of the stopping groove 516 and are arranged in an arc shape, and the arc formed by connecting the plurality of limiting grooves 517 is consistent with the arc surface of the arc-shaped protrusion 513.

[0092] In one embodiment, as Figure 11 andFigure 12 As shown, a guiding protrusion 518 protrudes from the bottom wall of the stop groove 516. The extending direction of the guiding protrusion 518 is the same as that of the arc-shaped protrusion 513. The stop protrusion 526 is correspondingly recessed with a guiding groove 528 for the guiding protrusion 518, and the guiding protrusion 518 is in sliding fit with the guiding groove 528.

[0093] It can be understood that by providing the guiding protrusion 518 and the guiding groove 528, on the one hand, when the pressing plate 515 presses the mother shaft 51, the arc-shaped protrusion 513 of the mother shaft 51 slides along the extending direction of the arc-shaped groove 523, so as to use the guiding protrusion 518 to provide guidance for the sliding of the stop protrusion 526. On the other hand, when the adjusting plate 525 of the sub-shaft 52 rotates and adjusts the sub-shaft 52, the arc-shaped protrusion 513 rotates around the extending direction of the arc-shaped groove 523. At this time, the arc-shaped groove 523 rotates around the axial direction of the guiding protrusion 518, so that the limiting protrusion 527 is engaged or disengaged from the limiting groove 517.

[0094] In an embodiment, a pressing groove 13 is provided corresponding to the pressing plate 515 at the first rotating end 11 or the second rotating end 21. A through hole 14 communicating with the rotating cavity 25 is provided at the bottom wall of the pressing groove 13, and the through hole 14 is correspondingly communicated with the adjusting cavity 41; the pressing plate 515 is located in the pressing groove 13, and one end of the mother shaft 51 away from the pressing plate 515 passes through the through hole 14 and extends into the adjusting cavity 41; the adjusting assembly 5 further includes a return spring 53 located in the pressing groove 13. The return spring 53 is sleeved on one end of the mother shaft 51 adjacent to the pressing plate 515, and both ends of the return spring 53 are elastically abutted against the pressing plate 515 and the bottom wall of the pressing groove 13 respectively.

[0095] In this embodiment, as Figure 1 、 Figure 2 、 Figure 3 and Figure 8 shown, by providing the return spring 53, the return spring 53 is used to reset the pressing plate 515, so as to ensure that the sub-shaft 52 and the mother shaft 51 are engaged and limited in the limiting groove 517 by the limiting protrusion 527, so as to realize position locking.

[0096] It can be understood that the first rotating end 11 is provided with a pressing groove 13 corresponding to the pressing plate 515, and a through hole 14 communicating with the rotating cavity 25 is provided at the bottom wall of the pressing groove 13. The second rotating end 21 is provided with a through hole 18 corresponding to the through hole 14, so that the through hole 14 and the through hole 18 are coaxially arranged and correspondingly communicated with the adjusting cavity 41. In this way, it is convenient for the sub-shaft 51 and the mother shaft 52 to be rotationally connected to the first rotating end 11 and the second rotating end 21 through the through hole 14 and the through hole 18.

[0097] In this embodiment, the pressing groove 13 also circumferentially limits and axially slides the pressing plate 515, and facilitates the installation of the return spring 53. At the same time, through the cooperation of the stop bump 526 and the stop groove 516, the elastic force of the return spring 53 is prevented from separating or disengaging the mother shaft 51 and the child shaft 52 from the adjustment cavity 41.

[0098] It can be understood that in order for the pressing groove 13 to circumferentially limit and axially slide the pressing plate 515, as Figure 1 , Figure 8 and Figure 11 shown, the side wall of the pressing groove 13 is provided with a first limiting surface 15, and the periphery of the pressing plate 515 is provided with a second limiting surface 519. The first limiting surface 15 and the second limiting surface 519 are in sliding contact to limit the rotation of the pressing plate 515 around the axial direction of the mother shaft 51.

[0099] It can be understood that the side wall of the pressing groove 13 is provided with at least one first limiting surface 15, and the periphery of the pressing plate 515 is provided with at least one second limiting surface 519. When the pressing plate 515 is located in the pressing groove 13, the first limiting surface 15 and the second limiting surface 519 are in sliding contact. At this time, the first limiting surface 15 and the second limiting surface 519 can slide along the axial direction of the mother shaft 51. However, the first limiting surface 15 and the second limiting surface 519 cannot rotate around the axial direction of the mother shaft 51. Thus, when the adjusting plate 525 of the child shaft 52 adjusts the rotation of the child shaft 52 around its axial direction, the mother shaft 52 remains fixed relative to the first rotating end 11 and the second rotating end 21 through the limiting action of the first limiting surface 15 and the second limiting surface 519.

[0100] In one embodiment, the first rotating end 11 or the second rotating end 21 is provided with a receiving groove 16 corresponding to the adjusting plate 525. The receiving groove 16 communicates with the rotating cavity 25 and corresponds to the adjusting cavity 41. The adjusting plate 525 is movably limited in the receiving groove 16, and one end of the child shaft 52 away from the adjusting plate 525 passes through the receiving groove 16 and extends into the adjusting cavity 41.

[0101] It can be understood that as Figure 2 , Figure 3 , Figure 9 and Figure 12 shown, by providing the receiving groove 16 on the side of the first rotating end 11 or the second rotating end 21 away from the pressing groove 13, the receiving groove 16 is used to accommodate the adjusting plate 525, so as to improve the relationship. In this embodiment, the bottom wall of the receiving groove 16 is provided with a through hole 18, and one end of the child shaft 52 away from the adjusting plate 525 passes through the through hole 18 and extends into the adjusting cavity 41. In order to facilitate the rotation of the child shaft 52, the outer contour of the adjusting plate 525 can be selected to be circular. Optionally, the outer contour of the receiving groove 16 is consistent with the outer contour of the adjusting plate 525.

[0102] In one embodiment, as Figure 12As shown, on the side of the adjusting plate 525 facing away from the sub-shaft 52, there is an adjusting groove 529. It can be understood that the setting of the adjusting groove 529 is beneficial for the user to conveniently rotate the sub-shaft 52 through the adjusting groove 529. Optionally, the adjusting groove 529 can be in the structure of a groove, a strip-shaped groove, an arc-shaped groove, a handle, a protrusion, etc., which is not limited herein.

[0103] In one embodiment, on the side of the first rotating end 11 facing the second rotating end 21, there is a rotating groove 12. On the side of the second rotating end 21 facing the first rotating end 11, there is a rotating protrusion 22, and the rotating protrusion 22 is provided with a receiving groove 23; the rotating protrusion 22 is received in the rotating groove 12, so that the receiving groove 23 and the rotating groove 12 cooperate to form a rotating cavity 25, and the two elastic arms 42 are respectively elastically connected to the groove walls of the rotating groove 12 and the receiving groove 23.

[0104] In this embodiment, as Figure 1 , Figure 2 , Figure 5 , Figures 7 to 9 shown, the rotating groove 12 is an arc-shaped groove, and the rotating protrusion 22 is an arc-shaped groove that rotates in cooperation with the rotating groove 12. In order to facilitate the installation of the rotating shaft spring 4 and the adjusting assembly 5, the rotating protrusion 22 is recessed with a receiving groove 23, and the receiving groove 23 is in the structure of an arc-shaped groove.

[0105] It can be understood that when the rotating protrusion 22 is received in the rotating groove 12, the receiving groove 23 and the rotating groove 12 cooperate to form a rotating cavity 25. The sub-shaft 52 and the mother shaft 51 of the adjusting assembly 5 are disposed through the adjusting cavity 41 of the rotating shaft spring 4, and the two ends of the sub-shaft 52 and the mother shaft 51 are respectively rotatably connected to the groove walls of the receiving groove 23 and the rotating groove 12.

[0106] Optionally, through holes 18 communicating with the rotating cavity 25 are respectively formed on the opposite side walls of the rotating groove 12 and the receiving groove 23. The two ends of the adjusting assembly 5 respectively extend out of the adjusting cavity 41 and are movably disposed through the through holes 18. It can be understood that the two ends of the sub-shaft 52 and the mother shaft 51 respectively extend out of the adjusting cavity 41 and are rotatably disposed through the through holes 18.

[0107] In this embodiment, the two elastic arms 42 of the rotating shaft spring 4 are respectively elastically connected to the groove walls of the rotating groove 12 and the receiving groove 23. As Figure 5 , Figures 7 to 9 shown, the bottom wall of the rotating groove 12 is provided with a first limiting hole 17, and the bottom wall of the receiving groove 23 is provided with a second limiting hole 24. One elastic arm 42 extends into the first limiting hole 17, and the other elastic arm 42 extends into the second limiting hole 24.

[0108] It can be understood that the first limiting hole 17 and the second limiting hole 24 can be through-hole structures, groove structures, or through-groove structures, which are not limited herein. In this embodiment, when the sub-shaft 52 and the mother-shaft 51 of the adjusting assembly 5 are in the first state, the cross-sectional area or diameter of the adjusting cavity 41 of the rotating shaft spring 4 is the smallest. At this time, the rotating groove 12 of the first rotating end 11 and the accommodating groove 23 of the rotating protrusion 22 of the second rotating end 21 cooperate to form a circular cavity. When the sub-shaft 52 and the mother-shaft 51 of the adjusting assembly 5 are in the second state, the cross-sectional area or diameter of the adjusting cavity 41 of the rotating shaft spring 4 becomes larger, so that there is a gap on the side of the rotating groove 12 of the first rotating end 11 and the accommodating groove 23 of the rotating protrusion 22 of the second rotating end 21 facing the wearing space 3.

[0109] In one embodiment, as Figures 1 to 5 shown, the headband 100 of the headset further includes a foam 6, and the foam 6 is provided on the sides of the second bracket 2 and the first bracket 1 facing the wearing space 3. It can be understood that by providing the foam 6, when the user wears the headband 100, the user's head contacts the foam 6, realizing elastic buffering, avoiding the user's head directly contacting the first bracket 1 and the second bracket 2 rigidly, and improving the comfort of the user wearing. Of course, in other embodiments, the foam 6 can also be other structures or materials that can achieve buffering or flexible structures, which are not limited herein.

[0110] It can be understood that by covering the outermost side of the foam 6 with cloth, all internal structural members, such as the first bracket 1 and the second bracket 2, etc., are blocked, providing a neat and beautiful appearance.

[0111] The first bracket 1 and the second bracket 2 of the headband 100 of the present invention are connected by a sub-shaft 52 and a mother-shaft 51, and the rotating shaft spring 4 provides a clamping force for the first bracket 1 and the second bracket 2. By setting the cross-section of the mother-shaft 51 to a conch shape and the cross-section of the sub-shaft 52 to a special shape, the sub-shaft 52 and the mother-shaft 51 just form a complete circular cross-section. There is a rotating shaft spring 4 around the outside of the sub-shaft 52 and the mother-shaft 51, and the shape of the rotating shaft spring 4 is customized to facilitate the adjustment of the elastic force. There is a pressing plate 515 on one side of the mother-shaft 51, and a pressing groove 13 for limiting the pressing plate 515 is provided on the first bracket 1, and a return spring 53 is provided between the pressing plate 515 of the mother-shaft 51 and the bottom wall of the pressing groove 13 for the automatic rebound of the mother-shaft 51. There is a cross-shaped groove (i.e., an adjusting groove 529) on one side of the sub-shaft 52, and the sub-shaft 52 can be rotated externally to adjust the spring elastic force, thereby adjusting the clamping force of the headband 100.

[0112] It can be understood that in the original state (i.e., the first state), the cross-sections of the sub-shaft 52 and the mother-shaft 51 form a complete circle. At this time, the opening angle of the rotating shaft spring 4 is small, and the clamping force of the headband 100 is large, which is suitable for small heads to wear, as Figure 4 and Figure 5As shown. Rotate the sub-axis 52 through the linear adjustment slot 529 on one side of the sub-axis 52, so that the sub-axis 52 rotates along the arc-shaped protrusion 513 of the lower semi-circle of the mother axis 51, making the sub-axis 52 and the mother axis 51 in the second state. In this state, the cross-sections of the sub-axis 52 and the mother axis 51 form a circle or an ellipse with a larger diameter. At this time, the rotation shaft spring 4 opens at a larger angle, and the clamping force of the head-mounted head beam 100 is small, which is suitable for people with larger heads to wear. Such as Figure 6 and Figure 7 shown.

[0113] In this embodiment, in order to facilitate the sub-axis 52 and the mother axis 51 of the limit adjustment assembly 5 to be in the first state or the second state, a pressing plate 515 is provided on one side of the mother axis 51, which cooperates with the pressing groove 13 of the first bracket 1 to achieve circumferential direction limit and axial direction movement. A return spring 53 is provided between the pressing plate 515 of the mother axis 51 and the pressing groove 13, which is used to automatically rebound after pressing the pressing plate 515 of the mother axis 51. When pressing the pressing plate 515 of the mother axis 51, the return spring 53 is in a compressed state, and the stop protrusion 526 moves along the guiding protrusion 518, so that the limit protrusion 527 disengages from the limit groove 517. At this time, the sub-axis 52 is rotated through the adjustment slot 529 of the sub-axis 52. The arc-shaped groove 523 of the sub-axis 52 rotates around the axial direction relative to the arc-shaped protrusion 513. Then when the pressing plate 515 of the mother axis 51 is released, the return spring 53 rebounds and pushes the pressing plate 515 to reset, so that the stop protrusion 526 moves along the guiding protrusion 518 in the stop groove 516, so that the limit protrusion 527 is clamped in another limit groove 517. At this time, the limit protrusion 527 and the limit groove 517 are in a buckled state for limit locking, so as to realize the locking of the connection state of the sub-axis 52 and the mother axis 51. Such as Figure 7 shown.

[0114] The present invention also proposes a head-mounted device, which includes a device main body and the above-mentioned head-mounted head beam 100. The device main body is connected to the mutually remote ends of the first bracket 1 and the second bracket 2 of the head-mounted head beam 100. The specific structure of the head-mounted head beam 100 refers to the foregoing embodiments. Since this head-mounted device adopts all the technical solutions of all the foregoing embodiments, it at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be elaborated here one by one.

[0115] It can be understood that the device main body includes two ear cups. One ear cup is movably connected to the end of the first bracket 1 of the head-mounted head beam 100 away from the second bracket 2, and the other ear cup is movably connected to the end of the second bracket 2 of the head-mounted head beam 100 away from the first bracket 1, so that the head-mounted device is in the structure of a head-mounted earphone.

[0116] Of course, the device body is a VR body, and both ends of the VR body are respectively connected to both ends of the first bracket 1 and the second bracket 2 of the head-mounted head beam 100, so that the head-mounted device is a head-mounted VR device or the like, which is not limited herein.

[0117] The above are only alternative embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A headband, characterized in that, The headband described above includes: A first bracket, the first bracket having a first rotating end; A second bracket, the second bracket having a second rotating end, the second rotating end being movably connected to the first rotating end so that the second bracket and the first bracket enclose a wearing space, and a rotating cavity being formed by the cooperation between the first rotating end and the second rotating end; A shaft spring, the shaft spring being movably disposed in the rotating cavity, the shaft spring having an adjusting cavity, and the shaft spring further being provided with elastic arms respectively extending towards both sides of the adjusting cavity, the two elastic arms being elastically connected to the first rotating end and the second rotating end respectively; and An adjusting assembly, the adjusting assembly being movably inserted through the adjusting cavity, the adjusting assembly adjusting the size of the adjusting cavity to adjust the size of the wearing space; Wherein, the adjusting assembly includes a sub-shaft and a mother-shaft movably inserted through the adjusting cavity, the mother-shaft having a first arc surface and a first abutting surface connected to each other, the sub-shaft having a second arc surface and a second abutting surface connected to each other, one of the first abutting surface and the second abutting surface being convex with an arc-shaped protrusion, and the other of the two being concave with an arc-shaped groove; The adjusting assembly has a first state in which the sub-shaft and the mother-shaft are mutually attached and cooperate to form a cylinder, and a second state in which at least one side of the sub-shaft and the mother-shaft is opened and they are mutually separated; In the first state, the arc-shaped protrusion is received in the arc-shaped groove, and the first abutting surface is in abutting contact with the second abutting surface so that the first arc surface and the second arc surface cooperate to form the circumferential surface of the cylinder; In the second state, part of the arc-shaped protrusion is received in the arc-shaped groove, and the sides of the first abutting surface and the second abutting surface away from the arc-shaped protrusion and the arc-shaped groove are mutually separated.

2. The headband according to claim 1, wherein, In the first state, the inner wall of the adjusting cavity is in contact with the outer wall of the cylinder, so that the two elastic arms form a first included angle; In the second state, the inner wall of the adjusting cavity abuts against the outer walls of part of the sub-shaft and part of the mother-shaft, so that the two elastic arms form a second included angle; Wherein, the second included angle is greater than the first included angle, and the cross-sectional area of the adjusting cavity in the first state is smaller than the cross-sectional area of the adjusting cavity in the second state.

3. The headband according to claim 2, characterized in that, The side of the first abutting surface adjacent to the first arc surface is convex with the arc-shaped protrusion, the arc-shaped protrusion extends along the extension direction of the mother-shaft, the arc-shaped protrusion is smoothly connected to the first arc surface in a transitional manner, and the arc-shaped protrusion and the first abutting surface cooperate to form a first stop surface; The side of the second abutting surface adjacent to the second arc surface is concave with the arc-shaped groove, and the arc-shaped groove and the second abutting surface cooperate to form a second stop surface; In the first state, the first stop surface is in abutting contact with the second stop surface; in the second state, the first stop surface and the second stop surface are mutually separated.

4. The headband according to claim 3, characterized in that, One end of the sub-axis is provided with an adjusting plate. A stop projection is provided at one end of the arc-shaped groove away from the adjusting plate. A pressing plate is provided at one end of the mother-axis away from the adjusting plate. A stop groove is provided at one end of the arc-shaped projection connecting the pressing plate. When the arc-shaped projection is received in the arc-shaped groove, the stop projection is received in the stop groove; The stop projection is connected to the groove wall of the stop groove through a limiting structure to limit the relative positions of the sub-axis and the mother-axis, so that the sub-axis and the mother-axis are in the first state or the second state.

5. The headband according to claim 4, wherein, The limiting structure includes a limiting projection and a limiting groove. One of the limiting projection and the limiting groove is provided on the side of the stop projection facing the adjusting plate, and the other is provided on the side of the groove wall of the stop groove facing the pressing plate; Wherein, by pressing the pressing plate, the arc-shaped projection moves along the arc-shaped groove, so that the stop projection moves in the stop groove, so that the limiting projection is clamped or disengaged from the limiting groove.

6. The headband according to claim 5, wherein, There are multiple limiting grooves, and the multiple limiting grooves are arranged at intervals along the side wall of the stop groove or the side of the stop projection facing the adjusting plate; And / or, a guiding projection is convexly provided on the bottom wall of the stop groove, and the extending direction of the guiding projection is the same as the extending direction of the arc-shaped projection. A guiding groove is concavely provided on the stop projection corresponding to the guiding projection, and the guiding projection is in sliding fit with the guiding groove.

7. The headband according to claim 4, wherein A pressing groove is provided on the first rotating end or the second rotating end corresponding to the pressing plate. A through hole communicating with the rotating cavity is provided on the bottom wall of the pressing groove, and the through hole is correspondingly communicated with the adjusting cavity; The pressing plate is located in the pressing groove, and one end of the mother-axis away from the pressing plate passes through the through hole and extends into the adjusting cavity; The adjusting assembly further includes a return spring located in the pressing groove. The return spring is sleeved on one end of the mother-axis adjacent to the pressing plate, and the two ends of the return spring are elastically abutted against the pressing plate and the bottom wall of the pressing groove respectively.

8. The headband according to claim 7, wherein A first limiting surface is provided on the side wall of the pressing groove, and a second limiting surface is provided on the periphery of the pressing plate. The first limiting surface and the second limiting surface are in sliding contact to limit the rotation of the pressing plate around the axial direction of the mother-axis; And / or, a receiving groove is provided on the first rotating end or the second rotating end corresponding to the adjusting plate. The receiving groove communicates with the rotating cavity and corresponds to the adjusting cavity. The adjusting plate is movably limited in the receiving groove, and one end of the sub-axis away from the adjusting plate passes through the receiving groove and extends into the adjusting cavity; And / or, an adjusting groove is provided on the side of the adjusting plate facing away from the sub-axis; And / or, in the second state, the included angle formed by the plane where the first stop surface is located and the plane where the second stop surface is located is less than 60°.

9. The headband according to any one of claims 1 to 8, characterized in that A rotating groove is provided on one side of the first rotating end facing the second rotating end. A rotating projection is provided on one side of the second rotating end facing the first rotating end. The rotating projection is provided with a receiving groove; The rotating protrusion is received in the rotating groove, so that the accommodating groove and the rotating groove cooperate to form the rotating cavity, and the two elastic arms are elastically connected to the groove walls of the rotating groove and the accommodating groove respectively.

10. The headband according to claim 9, characterized in that, A first limiting hole is provided in the bottom wall of the rotating groove, and a second limiting hole is provided in the bottom wall of the accommodating groove. One elastic arm extends into the first limiting hole, and the other elastic arm extends into the second limiting hole; And / or, through holes communicating with the rotating cavity are respectively formed in opposite side walls of the rotating groove and the accommodating groove, and both ends of the adjusting assembly extend out of the adjusting cavity and are movably disposed through the through holes; And / or, the head-mounted head beam further includes a foam, and the foam is disposed on one side of the second bracket and the first bracket facing the wearing space.

11. A head-mounted device, characterized in that, It includes a device main body and the head-mounted head beam according to any one of claims 1 to 10, and the device main body is connected to the ends of the first bracket and the second bracket of the head-mounted head beam that are far away from each other.

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