Head-mounted earmuff

Abstract

The invention relates to a head-mounted earmuff. The head-mounted earmuff comprises two earmuff bodies and a head-mounted body, each earmuff body is provided with a gasket part and a muff body part. The gasket part is provided with a through containing hole. The cover body part is pivoted to the gasket part in a manner of switching and pivoting between a closed position and an open position relative to the gasket part. And at the closing position, the cover body part covers the outer side surface of the gasket part so as to close the outer end of the accommodating hole. In the open position, the cover body portion pivots away from the outer side of the gasket portion. The head-mounted body is provided with an assembling sheet and two connecting parts; the pivoting ends of the two connecting parts are respectively pivoted with the gasket parts of the two earmuff bodies; the sliding connection ends of the two connecting parts are connected to the assembling section of the assembling piece in a sliding mode in the mode that the connecting length between the connecting parts and the assembling piece can be adjusted and positioned, so that the size of the head wearing space defined by the assembling piece and the two connecting parts is adjusted.

Description

Technical Field

[0001] The present invention relates to an earcup, specifically a head-mounted earcup. Background Art

[0002] An earcup is a hearing protection product worn on a user's head in a manner that covers the user's ears. In the case of an earcup solely for the purpose of sound insulation, the earcup can protect the user's ears from hearing damage caused by noise.

[0003] However, when the user needs to have a conversation or use a communication device, the user must remove the entire earcup and thus be exposed to a noisy environment. Alternatively, the user adopts a method of folding and displacing one of the cup body parts of the earcup to expose one ear for conversation or use of a communication device, but this causes the support point of the folded and displaced cup body part to press against the user's head, resulting in discomfort. Summary of the Invention

[0004] Therefore, the object of the present invention is to provide a head-mounted earcup that can open the cup body part to allow external sounds to enter without removing the earcup or folding and displacing the cup body part.

[0005] The technical means adopted by the present invention to solve the problems of the prior art is to provide a head-mounted earcup, comprising: two earcup bodies, each of the earcup bodies having a gasket part and a cup body part, wherein the inner side surface of the gasket part is a covering surface for covering the user's head, and the gasket part has a receiving hole penetrating from the inner side surface to the outer side surface of the gasket part, the cup body part is pivotally connected to the gasket part in a manner that can be switched and pivoted between a closed position and an open position relative to the gasket part, wherein in the closed position, the cup body part covers the outer side surface of the gasket part to close the outer end of the receiving hole to isolate external sounds, and in the open position, the cup body part pivots away from the outer side surface of the gasket part to open the outer end of the receiving hole to allow external sounds to enter; and a headband, having a connecting piece and two connecting parts, wherein the connecting piece has two connecting segments that arc-extend towards the left and right sides, each of the connecting parts has a pivoting end extending downward and a sliding end extending upward, the pivoting ends of the two connecting parts are respectively pivotally connected to the gasket parts of the two earcup bodies, and the sliding ends of the two connecting parts are respectively slidably connected to the connecting segments in a manner that the connection length between the connecting part and the connecting piece can be adjusted and positioned, and by sliding and positioning the two connecting parts relative to the connecting piece, the size of the head-wearing space enclosed by the connecting piece and the two connecting parts is adjusted.

[0006] In an embodiment of the present invention, a head-mounted earcup is provided, wherein the gasket part of the earcup body includes an annular frame and a gasket body, and the gasket body is assembled on the inner side surface of the annular frame.

[0007] In an embodiment of the present invention, a head-mounted earmuff is provided. The annular frame protrudes pivot columns on the front and rear sides respectively for the pivot ends of the connecting portion to be pivotally connected to the pivot columns on the front and rear sides of the annular frame. The pivot columns of the annular frame protrude outward to form pivot abutting blocks. The connecting portion is provided with inward-tilting limiting abutting blocks and outward-tilting limiting abutting blocks at intervals on the inner side surface of the pivot end according to the pivot limiting angle. The pivot abutting block is located between the inward-tilting limiting abutting block and the outward-tilting limiting abutting block to limit the pivot angle range of the earmuff body relative to the connecting portion.

[0008] In an embodiment of the present invention, a head-mounted earmuff is provided. The cover body portion of the earmuff body includes an outer cover shell and a sound insulation block. The outer cover shell is pivotally connected to the annular frame. The sound insulation block is arranged in the outer cover shell, and the sound insulation block is arranged to cover the outer side surface of the annular frame to close the outer end of the accommodation hole in the closed position, and to be away from the annular frame to open the outer end of the accommodation hole in the open position.

[0009] In an embodiment of the present invention, a head-mounted earmuff is provided. The annular frame has a pivot seat located at the top of the annular frame, and the outer cover shell has a pivot portion located at the top of the outer cover shell. The outer cover shell is pivotally connected to the annular frame in such a way that the pivot portion is connected to the pivot seat. The outer cover shell is flipped from bottom to top relative to the annular frame with the pivot seat as the pivot center by applying a lateral thrust to the side of the outer cover shell away from the annular frame, and the outer cover shell pivots from the open position to the closed position under the domination of gravity after the lateral thrust is removed.

[0010] In an embodiment of the present invention, a head-mounted earmuff is provided. The annular frame is provided with a magnetic attraction member, and the outer cover shell is provided with a magnetic attraction corresponding member corresponding to the magnetic attraction member in a pivot manner. The cover body portion and the washer portion are positioned in the closed position by the mutual magnetic attraction between the magnetic attraction member and the magnetic attraction corresponding member.

[0011] In an embodiment of the present invention, a head-mounted earmuff is provided. The annular frame protrudes outward to form an outer ring sealing peripheral edge, and the outer cover shell protrudes inward to form an inner ring sealing peripheral edge. The outer peripheral shape of the inner ring sealing peripheral edge matches the inner peripheral shape of the outer ring sealing peripheral edge. In the closed position, the inner ring sealing peripheral edge of the outer cover shell and the outer ring sealing peripheral edge of the annular frame are hermetically sleeved inside and outside to ensure that external sound is prevented from entering through the gap between the annular frame and the outer cover shell.

[0012] In an embodiment of the present invention, a head-mounted earmuff is provided. A sliding positioning mechanism is disposed between the set of connecting segments of the connecting piece and the sliding connection end of the connecting portion. The sliding positioning mechanism includes a positioning tooth row extending along the arc length direction of the set of connecting pieces on the set of connecting segments and a positioning buckle pivotally connected to the sliding connection end of the connecting portion in an elastically resetable manner. The positioning buckle has a positioning convex tooth detachably engaged with the positioning tooth row. A torsion spring is disposed between the positioning buckle and the set of connecting pieces and presses against the positioning buckle to keep the positioning convex tooth of the positioning buckle engaged with the positioning tooth row. When an external pressure is applied to the positioning buckle to overcome the elastic force of the torsion spring, the positioning buckle pivots upward to disengage the positioning convex tooth from the positioning tooth row, so that the connecting portion and the set of connecting pieces can relatively slide and be positioned.

[0013] In an embodiment of the present invention, a head-mounted earmuff is provided. The sliding connection end of the connecting portion has a receiving groove, which is recessed from the sliding connection end along the arc length direction of the connecting portion towards the inside of the connecting portion to form a receiving space. The set of connecting segments of the set of connecting pieces is assembled into the receiving groove along the arc length direction of the connecting portion. The set of connecting pieces forms a guiding convex strip protruding along the arc length direction on the inner arc surface. The connecting portion forms a guiding groove recessed along the arc length direction on the inner surface of the receiving groove. The guiding convex strip is fitted into the guiding groove to guide the relative displacement between the set of connecting pieces and the connecting portion.

[0014] In an embodiment of the present invention, a head-mounted earmuff is provided. At the end of the set of connecting segments of the set of connecting pieces, a abutting block is formed by bending towards the inner arc surface. The connecting portion forms a abutting block protruding transversely on the inner surface of the receiving groove. When the set of connecting pieces is pulled outwards relative to the connecting portion so that the abutting block and the abutting block come into contact with each other, the separation between the set of connecting pieces and the connecting portion is restricted.

[0015] The technical means adopted by the head-mounted earmuff of the present invention can achieve the following technical effects: the outer side of the gasket portion is covered by the cover portion to close the outer end of the accommodation hole to isolate external sounds, and the outer end of the accommodation hole is opened by pivoting the cover portion away from the outer side of the gasket portion to allow external sounds to enter. The size of the head-wearing space enclosed by the set of connecting pieces and the two connecting portions is adjusted by sliding and positioning the two connecting portions relative to the set of connecting pieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Is a three-dimensional schematic diagram of a head-mounted earmuff according to an embodiment of the present invention.

[0017] Figure 2 Is a cross-sectional schematic diagram of a head-mounted earmuff according to an embodiment of the present invention.

[0018] Figure 3Schematic diagram of the earcup body of the head-mounted earcup in the embodiment of the present invention in an open position.

[0019] Figure 4 Partial enlarged schematic diagram of the annular frame and the pivot end in the head-mounted earcup in the embodiment of the present invention.

[0020] Figure 5 Partial cross-sectional schematic diagram of the assembly piece and the connecting part in the head-mounted earcup in the embodiment of the present invention.

[0021] Figure 6 Another partial cross-sectional schematic diagram of the assembly piece and the connecting part in the head-mounted earcup in the embodiment of the present invention.

[0022] Reference numerals

[0023] 100 Head-mounted earcup

[0024] 1 Earcup body

[0025] 11 Washer part

[0026] 110 Accommodating hole

[0027] 111 Annular frame

[0028] 112 Washer body

[0029] 114 Outer ring sealing periphery

[0030] 115 Magnetic part

[0031] 116 Pivot seat

[0032] 117 Pivot abutting block

[0033] 118 Pivot post

[0034] 12 Cover body part

[0035] 121 Outer cover shell

[0036] 122 Sound insulation block

[0037] 127 Inner ring sealing periphery

[0038] 128 Magnetic corresponding part

[0039] 129 Pivot part

[0040] 2 Headband body

[0041] 21 Assembly piece

[0042] 211 Assembly section

[0043] 212 Positioning tooth row

[0044] 213 Guide rib

[0045] 214 abutting block

[0046] 22 connecting part

[0047] 220 torsion spring

[0048] 221 pivot end

[0049] 222 sliding end

[0050] 223 positioning buckle

[0051] 224 accommodating groove

[0052] 225 guiding groove

[0053] 226 abutting block

[0054] 227 outward-tilting limiting abutting block

[0055] 229 inward-tilting limiting abutting block

[0056] 22E positioning convex tooth

[0057] 29 anti-sliding block

[0058] T pivot limiting angle Detailed implementation manners

[0059] The following is based on Figures 1 to 6 , and the implementation manners of the present invention are described. This description is not to limit the implementation manners of the present invention, but is one of the embodiments of the present invention.

[0060] As Figures 1 to 2 shown, a head-mounted earphone 100 according to an embodiment of the present invention includes: two earphone bodies 1 and a head-mounted body 2.

[0061] As Figures 1 to 3 shown, each of the earphone bodies 1 has a gasket portion 11 and a housing portion 12. The inner side surface of the gasket portion 11 is a sticking surface for sticking to the user's head, and the gasket portion 11 has an accommodating hole 110 penetrating from the inner side surface to the outer side surface of the gasket portion. The housing portion 12 is pivotally connected to the gasket portion 11 in a manner that can pivot between a closed position and an open position relative to the gasket portion 11.

[0062] Specifically, as Figures 1 to 3 shown, in the head-mounted earphone 100 according to an embodiment of the present invention, the gasket portion 11 of the earphone body 1 includes an annular frame 111 and a gasket body 112, and the gasket body 112 is assembled on the inner side surface of the annular frame 111.

[0063] Furthermore, as Figures 1 to 3As shown, in this closed position, the cover portion 12 covers the outer side surface of the gasket portion 11 to close the outer end of the accommodation hole 110 to isolate external sounds. In this open position, the cover portion 12 pivots away from the outer side surface of the gasket portion 11 to open the outer end of the accommodation hole 110 to allow external sounds to enter.

[0064] For the embodiments disclosed in the accompanying drawings of the present invention, as Figures 1 to 3 shown, the headset earcup 100 according to an embodiment of the present invention, wherein the cover portion 12 of the earcup body 1 includes an outer cover shell 121 and a sound insulation block 122. The outer cover shell 121 is pivotally connected to the annular frame 111. The sound insulation block 122 is disposed in the outer cover shell 121, and the sound insulation block 122 is arranged to cover the outer side surface of the annular frame 111 in the closed position to close the outer end of the accommodation hole 110, and to be away from the annular frame 111 in the open position to open the outer end of the accommodation hole 110.

[0065] Specifically, as Figures 1 to 3 shown, the headset earcup 100 according to an embodiment of the present invention, wherein the annular frame 111 has a pivot seat 116 located at the top of the annular frame 111, and the outer cover shell 121 has a pivot portion 129 located at the top of the outer cover shell 121. The outer cover shell 121 is pivotally connected to the annular frame 111 in such a way that the pivot portion 129 is connected to the pivot seat 116. The outer cover shell 121 is flipped from bottom to top relative to the annular frame 111 with the pivot seat 116 as the pivot center by a lateral thrust applied to the outer cover shell 121 away from the annular frame 111, and the outer cover shell 121 pivots from the open position to the closed position under the domination of gravity after the lateral thrust is removed.

[0066] In addition, as Figures 1 to 3 shown, the headset earcup 100 according to an embodiment of the present invention, wherein the annular frame 111 is provided with a magnetic attraction member 115, and the outer cover shell 121 is provided with a magnetic attraction corresponding member 128 pivotally corresponding to the magnetic attraction member 115, and the cover portion 12 and the gasket portion 11 are positioned in the closed position by the mutual magnetic attraction between the magnetic attraction member 115 and the magnetic attraction corresponding member 128.

[0067] Furthermore, as Figures 1 to 3As shown, the headset earcup 100 according to an embodiment of the present invention, wherein the annular frame 111 protrudes outward to form an outer ring sealing periphery 114, and the outer housing 121 protrudes inward to form an inner ring sealing periphery 127. The outer peripheral shape of the inner ring sealing periphery 114 matches the inner peripheral shape of the outer ring sealing periphery 127. In other words, in the closed position, the inner ring sealing periphery 127 of the outer housing 121 and the outer ring sealing periphery 114 of the annular frame 111 are hermetically sleeved inside and outside to ensure that external sounds are isolated from entering through the gap between the annular frame 111 and the outer housing 121.

[0068] As Figures 1 to 3 shown, the headband body 2 has a connecting piece 21 and two connecting parts 22. The connecting piece 21 has two connecting segments 211 that arc-extend toward the left and right sides.

[0069] As Figures 1 to 3 shown, each of the connecting parts 22 has a pivoting end 221 extending downward and a sliding end 222 extending upward. The pivoting ends 221 of the two connecting parts 22 are respectively pivoted to the gasket parts 11 of the two earcup bodies 1. The sliding ends 222 of the two connecting parts 22 are respectively slidably connected to the connecting segments 211 in a manner that the connection length between the connecting part 22 and the connecting piece 21 is adjustable and positionable. By sliding and positioning the two connecting parts 22 relative to the connecting piece 21, the size of the head-wearing space enclosed by the connecting piece 21 and the two connecting parts 22 is adjusted.

[0070] Specifically, as Figure 1 , Figure 2 and Figure 5 shown, the headset earcup 100 according to an embodiment of the present invention, wherein a sliding and positioning mechanism is provided between the connecting segment 211 of the connecting piece 21 and the sliding end 222 of the connecting part 22. The sliding and positioning mechanism includes a positioning tooth row 212 extending along the arc length direction of the connecting piece 21 on the connecting segment 211 and a positioning buckle 223 pivotally connected to the sliding end 222 of the connecting part 22 in an elastically resetable manner. The positioning buckle 223 has a positioning convex tooth 22E that meshes with the positioning tooth row 212 in a detachable manner. A torsion spring 220 is disposed between the positioning buckle 223 and the connecting piece 21 and presses against the positioning buckle 223 to keep the positioning convex tooth 22E of the positioning buckle 223 meshed with the positioning tooth row 212. That is to say, when an external pressure is applied to the positioning buckle 223 to overcome the elastic force of the torsion spring 220, the positioning buckle 223 pivots upward to disengage the positioning convex tooth 22E from the positioning tooth row 212, so that the connecting part 22 and the connecting piece 21 can relatively slide and be positioned.

[0071] Furthermore, as Figure 1 , Figure 2 ,Figure 5 and Figure 6 As shown in Figure 6 , for the head-mounted earphone 100 according to an embodiment of the present invention, the sliding end 222 of the connecting portion 22 has a receiving groove 224, and the receiving groove 224 is recessed from the sliding end 222 along the arc length direction of the connecting portion 22 towards the inside of the connecting portion 22 to form a receiving space. The connecting section 211 of the connecting piece 21 is assembled into the receiving groove 224 along the arc length direction of the connecting portion 22. The connecting piece 21 is formed with a guiding rib 213 protruding along the arc length direction on the inner arc surface. The inner side surface of the connecting portion 22 in the receiving groove 224 is recessed along the arc length direction of the connecting portion 22 to form a guiding groove 225. The guiding rib 213 is fitted into the guiding groove 225 to guide the relative displacement between the connecting piece 21 and the connecting portion 22.

[0072] Furthermore, as Figure 1 , Figure 2 and Figure 5 shown, for the head-mounted earphone 100 according to an embodiment of the present invention, the connecting piece 21 is bent towards the inner arc surface at the end of the connecting section 211 to form an abutting block 214, and the connecting portion 22 protrudes transversely on the inner surface of the receiving groove 224 to form an abutting block 226. When the connecting piece 21 is pulled outwards relative to the connecting portion 22 so that the abutting block 214 contacts the abutting block 226, the separation between the connecting piece 21 and the connecting portion 22 is restricted.

[0073] In addition, as Figure 1 , Figure 3 and Figure 4 shown, for the head-mounted earphone 100 according to an embodiment of the present invention, the annular frame 111 protrudes with pivot columns 118 on the front and rear sides respectively for the pivot end 221 of the connecting portion 22 to be pivotally connected to the pivot columns 118 on the front and rear sides of the annular frame 111, and the pivot columns 118 of the annular frame 111 protrude outwards to form pivot abutting blocks 117. The connecting portion 22 is provided with an inwardly inclined limiting abutting block 229 and an outwardly inclined limiting abutting block 227 at intervals on the inner side surface of the pivot end 221 according to the pivot limiting angle T. The pivot abutting block 117 is located between the inwardly inclined limiting abutting block 229 and the outwardly inclined limiting abutting block 227 to limit the pivot angle range of the earphone body 1 relative to the connecting portion 22.

[0074] As Figure 2 and Figure 3 shown, the head-mounted body 2 also has a anti-sliding block 29. The anti-sliding block 29 is a long strip with a plurality of bumps, and the anti-sliding block 29 is arranged on the inner arc surface of the connecting piece 21. When the user wears the head-mounted earphone 100, the anti-sliding block 29 abuts against the user's head to prevent the head-mounted earphone 100 from sliding on the user's head.

[0075] As can be seen from the above, the headset earcup 100 of the present invention pivotally connects the housing portion 12 to the gasket portion 11 in a manner that can be switched between a closed position and an open position relative to the gasket portion 11, so that the outer end of the accommodation hole 110 is closed by the housing portion 12 covering the outer side surface of the gasket portion 11 to isolate external sounds, and the outer end of the accommodation hole 110 is opened by the housing portion 12 pivoting away from the outer side surface of the gasket portion 11 to allow external sounds to enter.

[0076] Moreover, the headset earcup 100 of the present invention adjusts the size of the headset space enclosed by the connecting piece 21 and the two connecting portions 22 by sliding and positioning the two connecting portions 22 of the headset body 2 relative to the connecting piece 21.

[0077] The above description and explanation are only for the description of the preferred embodiments of the present invention. For this technology, those skilled in the art can make other modifications according to the protection scope defined above and the above description, but these modifications should still be within the protection scope of the present invention in accordance with the inventive spirit of the present invention.

Claims

1. A head-mounted earmuff, characterized in that: Include: Two earmuff bodies, each of the earmuff bodies comprises a gasket portion and a cover portion, wherein the inner side surface of the gasket portion is a covering surface for covering the user's head, and the gasket portion comprises a receiving hole extending from the inner side surface to the outer side surface of the gasket portion, and the cover portion is pivotally connected to the gasket portion in a manner of switching and pivoting relative to the gasket portion between a closed position and an open position, wherein in the closed position, the cover portion covers the outer side surface of the gasket portion so that the outer end of the receiving hole is closed to isolate external sounds, and in the open position, the cover portion pivots away from the outer side surface of the gasket portion so that the outer end of the receiving hole is open to allow external sounds to enter; and A head-mounted body, comprising an assembly sheet and two connecting parts, wherein the assembly sheet has two assembly sections extending in an arc shape toward the left and right sides, each of the connecting parts has a pivot end extending downward and a sliding end extending upward, the pivot ends of the two connecting parts are respectively pivotally connected to the gasket parts of the two earmuff bodies, and the sliding ends of the two connecting parts are respectively slidably connected to the assembly sections in a manner that the connection length between the connecting parts and the assembly sheet can be adjusted and positioned, and the size of the head-mounted space enclosed by the assembly sheet and the two connecting parts can be adjusted by sliding and positioning the two connecting parts relative to the assembly sheet.

2. The head-mounted earmuff according to claim 1, characterized in that: The gasket part of the earmuff body comprises an annular frame and a gasket body, and the gasket body is assembled on the inner side surface of the annular frame.

3. The head-mounted earmuff according to claim 2, characterized in that: The annular frame is provided with pivot posts protruding from the front and rear sides respectively, so that the pivot end of the connecting part is pivotally connected to the pivot posts on the front and rear sides of the annular frame, and the pivot posts of the annular frame protrude outward to form a pivot stop block. The connecting part is provided with an inward limit stop block and an outward limit stop block at intervals on the inner side surface of the pivot end according to the pivot limit angle, and the pivot stop block is located between the inward limit stop block and the outward limit stop block to limit the pivot angle range of the earmuff body relative to the connecting part.

4. The head-mounted earmuff according to claim 2, characterized in that: The cover body of the earmuff body includes an outer cover shell and a sound insulation block, the outer cover shell is pivotally connected to the annular frame, the sound insulation block is arranged in the outer cover shell, and the sound insulation block is arranged to cover the outer side surface of the annular frame to close the outer end of the accommodating hole when in the closed position, and to be away from the annular frame to open the outer end of the accommodating hole when in the open position.

5. The head-mounted earmuff according to claim 4, characterized in that: The annular frame has a pivot seat located at the top of the annular frame, and the outer cover shell has a pivot portion located at the top of the outer cover shell. The outer cover shell is pivotally connected to the annular frame in a manner that the pivot portion is connected to the pivot seat. The outer cover shell is flipped from bottom to top to the open position relative to the annular frame with the pivot seat as the pivot center due to a lateral thrust applied to the outer cover shell away from the annular frame. The outer cover shell pivots from the open position to the closed position under the dominance of gravity after the lateral thrust is removed.

6. The head-mounted earmuff according to claim 4, characterized in that: The annular frame is provided with a magnetic attraction part, and the outer cover shell is provided with a magnetic attraction counterpart corresponding to the pivot of the magnetic attraction part. The cover body and the gasket part are fixed in the closed position through the mutual magnetic attraction between the magnetic attraction part and the magnetic attraction counterpart.

7. The head-mounted earmuff according to claim 4, characterized in that: The annular frame protrudes outward to form an outer ring sealing edge, and the outer cover shell protrudes inward to form an inner ring sealing edge. The outer peripheral shape of the inner ring sealing edge matches the inner peripheral shape of the outer ring sealing edge. In the closed position, the inner ring sealing edge of the outer cover shell and the outer ring sealing edge of the annular frame are airtightly fitted inside and outside to ensure that external sound is isolated from entering through the gap between the annular frame and the outer cover shell.

8. The head-mounted earmuff according to claim 1, characterized in that: A sliding positioning mechanism is provided between the assembly section of the assembly sheet and the sliding end of the connecting part, and the sliding positioning mechanism includes a positioning tooth row extending along the arc length direction of the assembly sheet and arranged on the assembly section, and a positioning buckle which can be elastically reset and pivoted to the sliding end of the connecting part, wherein the positioning buckle has a positioning convex tooth engaged with the positioning tooth row in a detachable manner, a torsion spring is provided between the positioning buckle and the assembly sheet and presses against the positioning buckle to keep the positioning convex tooth of the positioning buckle engaged with the positioning tooth row, and when external pressure is applied to the positioning buckle to overcome the elastic force of the torsion spring, the positioning buckle pivots upward to make the positioning convex tooth disengage from the positioning tooth row, so that the connecting part and the assembly sheet can slide and be positioned relative to each other.

9. The head-mounted earmuff according to claim 1, characterized in that: The sliding end of the connecting part has a accommodating groove, and the accommodating groove is recessed from the sliding end along the arc length direction of the connecting part toward the inside of the connecting part to form an accommodating space. The assembly section of the assembly piece is assembled into the accommodating groove along the arc length direction of the connecting part. The assembly piece is formed with a guide ridge protruding along the arc length direction of the assembly piece on the arc-shaped inner side surface. The connecting part is recessed along the arc length direction of the connecting part on the inner side surface of the accommodating groove to form a guide groove, and the guide ridge is embedded in the guide groove to guide the relative displacement between the assembly piece and the connecting part.

10. The head-mounted earmuff according to claim 9, characterized in that: The assembly piece is bent toward the arc-shaped inner surface at the end of the assembly section to form a supporting block, and the connecting portion protrudes laterally from the inner surface of the accommodating groove to form a resisting block. When the assembly piece is pulled outward relative to the connecting portion and the supporting block and the resisting block contact each other, the assembly piece and the connecting portion are restricted from being separated from each other.

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