Ear clip type earphone

Abstract

The earphone comprises a sound generating part, an abutting part and an ear hook. The sound generating part has a sound outlet. The ear hook connects the sound generating part and the abutting part. The ear hook provides elastic force between the sound generating part and the abutting part, so that the sound generating part and the abutting part have clamping force to clamp the auricles in a wearing state. The ear hook has a first end part connected with the sound generating part. The first end part is rotatably connected with the sound generating part around an axis of the first end part. Thus, the sound generating part can be rotated according to the shape and size of the user's ear, so that the sound outlet is aligned with the ear canal, thereby ensuring the size and tone of the sound.

Description

Technical Field

[0001] This application relates to the field of headphone technology, and more particularly to a clip-on headphone. Background Technology

[0002] In related technologies, the sound outlet position of clip-on headphones is usually fixed. Due to the differences in ear shape and size among different users, the sound outlet may not be accurately aligned with the ear canal when the user wears the headphones, which will affect the volume and sound quality. Utility Model Content

[0003] This application provides an ear clip-on earphone that solves the technical problem in related technologies where the sound outlet of an ear clip-on earphone fails to be precisely aligned with the ear canal during wear, thus affecting the volume and sound quality.

[0004] This application provides an ear clip-on earphone, including:

[0005] A sound-producing part, wherein the sound-producing part has a sound outlet;

[0006] The connecting part; and

[0007] The ear hook connects the sound-emitting part and the abutment part, and provides an elastic force between the sound-emitting part and the abutment part so that the sound-emitting part and the abutment part have a clamping force that holds the auricle on both sides when worn.

[0008] The ear hook has a first end connected to the sound-producing part, and the first end and the sound-producing part are rotatably connected about the axis of the first end.

[0009] In some embodiments, a latching part and a mounting part are also included, one of which is mounted on the sound-emitting part and the other is mounted on the first end. When the sound-emitting part rotates about the axis of the first end to a preset position, the latching part can lock with the mounting part to restrict the sound-emitting part from continuing to rotate.

[0010] In some embodiments, the mounting portion includes a plurality of protrusions spaced circumferentially along the first end, with a mounting groove formed between two adjacent protrusions. The latching portion is an elastic body, and when the sound-emitting portion rotates about the axis of the first end, the latching portion can switch between the plurality of mounting grooves.

[0011] In some embodiments, the side of the protrusion facing the mounting groove is an outwardly convex arc surface;

[0012] And / or, the side of the latching part opposite to the first end is a convex arc surface.

[0013] In some embodiments, the sound-emitting part is formed with a groove extending circumferentially along the first end portion, and the mounting part is located within the groove and protrudes from the bottom of the groove.

[0014] In some embodiments, the first end extends in a direction away from the central axis of the ear hook to form an extension plate, the buckle portion is mounted on the extension plate, the extension plate covers the groove opening of the recess, and the extension plate abuts against the mounting portion.

[0015] In some embodiments, the ear clip-on headphones further include a support portion disposed within the groove and connected to the sound-emitting portion. The support portion extends circumferentially along the first end and protrudes from the bottom of the groove. The extension plate abuts against the support portion.

[0016] In some embodiments, the sound-emitting part includes a housing having a receiving cavity, a through hole communicating with the receiving cavity, and a sound outlet communicating with the receiving cavity;

[0017] The ear hook also has a second end connected to the abutment portion, and the first end extends in a direction away from the second end to form a protrusion, the protrusion extending into the through hole and abutting against the inner sidewall of the housing.

[0018] In some embodiments, the protrusion includes a plurality of protrusions spaced circumferentially along the first end portion, each of the protrusions abutting against the inner sidewall of the housing.

[0019] In some embodiments, the ear hook includes a soft sleeve and a memory metal wire located within the soft sleeve, with the two ends of the soft sleeve connected to the sound-producing part and the abutment part, respectively.

[0020] The ear-clip earphone based on the embodiments of this application includes a sound-emitting part, a contact part, and an ear hook. The sound-emitting part has a sound outlet, and the ear hook connects the sound-emitting part and the contact part. The ear hook provides an elastic force between the sound-emitting part and the contact part, enabling the sound-emitting part and the contact part to have a clamping force that holds the two sides of the auricle when worn. The ear hook has a first end connected to the sound-emitting part, and the first end is rotatably connected to the sound-emitting part about the axis of the first end. In this way, the sound-emitting part can be rotated according to the shape and size of the user's ear, so that the sound outlet is aligned with the ear canal, thereby ensuring the volume and sound quality of the sound. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the clip-on earphone provided in the embodiment of this application;

[0023] Figure 2a A schematic diagram of the structure of the ear clip-on earphone provided in this application, showing the sound-emitting part in the first position;

[0024] Figure 2b A schematic diagram of the structure of the ear clip-on earphone provided in this application, showing the sound-emitting part in the second position;

[0025] Figure 2c A schematic diagram of the structure of the ear clip-on earphone provided in this application embodiment, showing the sound-emitting part in the third position;

[0026] Figure 2d A schematic diagram of the structure of the ear clip-on earphone provided in this application embodiment, showing the sound-emitting part located in the fourth position;

[0027] Figure 2e A schematic diagram of the structure of the ear clip-on earphone provided in this application embodiment, showing the sound-emitting part located in the fifth position;

[0028] Figure 3 An exploded structural diagram of the ear hook and sound-emitting part of the ear clip-on earphone provided in an embodiment of this application;

[0029] Figure 4 for Figure 3 Enlarged schematic diagram of the structure of section A in the middle;

[0030] Figure 5 for Figure 3 A structural diagram from another perspective.

[0031] Figure reference numerals:

[0032] 100, Sound-producing part; 100a, Sound outlet; 100b, Groove; 110, Housing; 110a, Through hole;

[0033] 200. Contact part;

[0034] 300, Ear hook; 310, First end; 311, Extension plate; 312, Protrusion; 3121, Protruding post; 3122, Rib; 3122a, Stepped surface; 3122b, Guide surface; 320, Second end;

[0035] 400. Buckle section;

[0036] 500, Mounting part; 510, Protrusion; 500a, Mounting groove;

[0037] 600. Support section. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0039] The ear may include the ear canal opening, concha cavity, cymba conchae, triangular fossa, antihelix, scaphoid fossa, helix, earlobe, and tragus. In some embodiments, the auricle (or auricle) can be a collective term for all other parts of the external ear except the ear canal opening. For example, as shown in the figure, the auricle may include the concha cavity, cymba conchae, triangular fossa, antihelix, scaphoid fossa, helix, earlobe, and tragus. In some embodiments, one or more parts of the ear can be used to achieve the wearing and stabilization of acoustic devices (such as headphones). In some embodiments, the ear canal opening, concha cavity, cymba conchae, triangular fossa, etc., have a certain depth and volume in three-dimensional space, which can also be used to meet the wearing requirements of acoustic devices.

[0040] Furthermore, individual differences among users may lead to variations in the shape, size, and other dimensions of the earpiece. To facilitate description and reduce (or even eliminate) these individual differences, a simulator containing the head and its (left and right) ears can be manufactured based on ANSI:S3.36, S3.25 and IEC:603187 standards, such as the GRAS45BCKEMAR. Therefore, descriptions such as "user wearing headphones," "headphones in wearing state," and "in wearing state" can refer to the headphones of this application being worn on the earpiece of the aforementioned simulator. Of course, due to individual differences among users, there may be some differences between the headphones worn by different users and the earpiece worn on the aforementioned simulator, but such differences should be tolerable.

[0041] In existing technology, the sound outlet position of clip-on headphones is usually fixed. Due to the differences in ear shape and size among different users, the sound outlet may not be accurately aligned with the ear canal when the user wears the headphones, which will affect the volume and sound quality.

[0042] To resolve the above technical issues, please refer to [link / reference]. Figure 1 This application provides an ear clip-on earphone, including a sound-emitting part 100, a contact part 200, and an ear hook 300.

[0043] When worn, the sound-emitting part 100 is inserted into the concha cavity of the user. The sound-emitting part 100 has a sound outlet 100a. Since the sound-emitting part 100 is a sound playback device used to convert electrical signals into sound signals, it can be played to the user through the sound outlet 100a.

[0044] The ear hook 300 connects the sound-emitting part 100 and the abutment part 200. The ear hook 300 provides an elastic force between the sound-emitting part 100 and the abutment part 200 so that the sound-emitting part 100 and the abutment part 200 have a clamping force that holds the earlobe on both sides when worn. That is, the ear hook 300 can go around the user's ear helix, and the sound-emitting part 100 and the abutment part 200 form a clamping state on both sides of the user's ear helix so that the entire earphone is clamped and worn on the user's ear helix.

[0045] The abutment portion 200 cooperates with the sound-generating portion 100, and the elastic force of the ear hook 300 clamps the back of the ear to prevent the earphone from falling off. In some embodiments, the abutment portion 200 may contain components such as a battery or circuit board. Of course, the abutment portion 200 may also be used without a battery, and the battery may be installed in the sound-generating portion 100.

[0046] Further, please refer to Figures 2a to 2e In this embodiment of the application, the ear hook 300 has a first end 310 connected to the sound-emitting part 100. The first end 310 and the sound-emitting part 100 are rotatably connected around the axis of the first end 310. In this way, the user can rotate the sound-emitting part 100 according to their own wearing situation, so that the sound outlet 100a on the sound-emitting part 100 is aligned with the ear canal as much as possible, thereby ensuring that the sound quality and volume are appropriate.

[0047] In one embodiment of this application, please refer to Figures 3 to 5 The ear clip-on headphones also include a snap-on part 400 and a mounting part 500. One of the snap-on part 400 and the mounting part 500 is mounted on the sound-emitting part 100, and the other is mounted on the first end 310 of the ear hook 300. When the sound-emitting part 100 rotates around the axis of the first end 310 to a preset position, the snap-on part 400 can lock with the mounting part 500 to limit the sound-emitting part 100 from continuing to rotate.

[0048] When the latching part 400 is installed on the sound-emitting part 100, the mounting part 500 is installed on the first end 310 of the ear hook 300. When the latching part 400 is installed on the first end 310 of the ear hook 300, the mounting part 500 is installed on the sound-emitting part 100. In this way, the latching part 400 can be locked with the mounting part 500, which can restrict the relative rotation between the ear hook 300 and the sound-emitting part 100, ensuring the stability of the entire ear clip-on headphone when the user wears it, thereby ensuring the sound quality and a suitable volume.

[0049] Based on the previous embodiment, please continue to refer to... Figures 3 to 4 The mounting part 500 includes a plurality of protrusions 510 spaced apart circumferentially along the first end 310, and a mounting groove 500a is formed between two adjacent protrusions 510. The latching part 400 is an elastic body. When the sound-emitting part 100 rotates around the axis of the first end 310, the latching part 400 can switch within the plurality of mounting grooves 500a.

[0050] Considering that the volume of the sound-emitting part 100 is generally larger than the volume of the end of the ear hook 300, the present application embodiment is illustrated by mounting part 500 on the sound-emitting part 100 and fastening part 400 on the first end 310 of the ear hook 300, so that the sound-emitting part 100 can provide enough space to accommodate the protrusion 510.

[0051] Since the latching part 400 is an elastic body, specifically rubber, silicone or some existing elastic composite materials, when the sound-emitting part 100 and the ear hook 300 rotate relative to each other, the latching part 400 can be switched in multiple mounting slots 500a through deformation, thereby adjusting the position of the sound outlet 100a on the sound-emitting part 100.

[0052] In one embodiment of this application, five mounting slots 500a are provided. The five mounting slots 500a are distributed circumferentially along the first end 310 on the sound-emitting part 100. The angle difference between adjacent mounting slots 500a is 20° to 25°. Thus, the adjustable angle of the entire sound-emitting part 100 is in the range of 80° to 100°, which can meet the wearing needs of most users and ensure the sound quality and appropriate volume.

[0053] It is also important to understand that, in order to prevent the latching part 400 from wobbling within the mounting groove 500a, which would cause the sound-emitting part 100 to wobble relative to the ear hook 300, when the latching part 400 is located within the mounting groove 500a, two adjacent protrusions 510 can abut against the latching part 400, thereby ensuring the stability of the entire clip-on headphone.

[0054] Optionally, the side of the protrusion 510 facing the mounting groove 500a is an outwardly convex arc surface. In this way, when the sound-generating part 100 rotates around the axis of the first end 310, the latching part 400 forms a "self-guiding" effect when switching between mounting grooves 500a, reducing torsional resistance. In another embodiment of this application, the side of the latching part 400 away from the first end 310 is an outwardly convex arc surface. In this way, the latching part 400 can slide more easily into the adjacent mounting groove 500a under torsional action, and can ensure the smoothness of the rotation of the sound-generating part 100 relative to the ear hook 300.

[0055] Please see Figure 4In one embodiment of this application, the sound-emitting part 100 is formed with a groove 100b extending circumferentially along the first end 310. The mounting part 500 is located in the groove 100b and protrudes from the bottom of the groove 100b. That is, the mounting part 500 is embedded in the circumferential groove 100b of the sound-emitting part 100, thereby reducing the thickness at the connection between the ear hook 300 and the sound-emitting part 100, which facilitates the miniaturization and lightweight design of the entire earphone and makes it easy to carry.

[0056] Since the mounting part 500 is located within the groove 100b, the latching part 400 can also be located within the groove 100b. Restricted by the side wall of the groove 100b, the movement direction of the latching part 400 is limited, reducing the possibility of the latching part 400 moving relative to the sound-emitting part 100 and ensuring the stability of the headphones when worn.

[0057] Furthermore, since both the mounting part 500 and the snap-on part 400 are located within the groove 100b, the sidewall of the groove 100b can also provide some protection for the snap-on part 400 and the mounting part 500, thereby extending the service life of the entire clip-on earphone.

[0058] Furthermore, the first end 310 extends in a direction away from the central axis of the ear hook 300 to form an extension plate 311, the buckle part 400 is installed on the extension plate 311, the extension plate 311 covers the groove of the groove 100b, and the extension plate 311 abuts against the mounting part 500.

[0059] By covering the opening of the groove 100b with the extension plate 311, both the mounting part 500 and the snap-fit ​​part 400 are located in a closed cavity, which can further protect the mounting part 500 and the snap-fit ​​part 400, thereby extending the service life of the entire earphone. The sealing of the opening of the groove 100b by the extension plate 311 can also reduce the possibility of dust and other impurities entering the groove 100b, thereby ensuring the smoothness of the sound-producing part 100 when rotating.

[0060] It is understandable that in headphones, the sound-producing part 100, the ear hook 300, and the abutment part 200 are generally separate parts that are then assembled together. Therefore, by abutting the extension plate 311 against the mounting part 500, it can be confirmed that the ear hook 300 is installed in place.

[0061] In one embodiment, please refer to Figure 4 The ear clip-on headphones also include a support portion 600, which is disposed in the groove 100b and connected to the sound-emitting portion 100. The support portion 600 extends circumferentially along the first end portion 310 and protrudes from the bottom of the groove 100b. The extension plate 311 abuts against the support portion 600.

[0062] Since both the mounting portion 500 and the support portion 600 are located within the groove 100b, and the groove 100b extends circumferentially along the first end portion 310, the mounting portion 500 and the support portion 600 are also spaced apart circumferentially along the first end portion 310. Since the extension plate 311 abuts against both the support portion 600 and the mounting portion 500, stress concentration can be avoided. The support portion 600 disperses the impact force borne by the extension plate 311 to the housing of the sound-emitting portion 100, reducing contact stress when the headphones are dropped, thereby protecting the headphones.

[0063] In this embodiment, the support 600 can also be integrally formed with the sound-emitting part 100. Therefore, when the support extends circumferentially along the first end 310, it can serve as a reinforcing rib, thereby ensuring the stability of the groove 100b and the entire sound-emitting part 100 structure.

[0064] The following will be combined with the appendix Figures 3 to 4 Further description of the sound-producing part 100.

[0065] The sound-emitting part 100 includes a housing 110, which has a receiving cavity, a through hole 110a communicating with the receiving cavity, and a sound outlet 100a communicating with the receiving cavity. A speaker system is provided in the receiving cavity, and the sound outlet 100a emits the sound generated by the speaker system. A power supply, a motherboard, and sensors can also be installed in the receiving cavity to realize the control of the ear clip-on headphones, such as Bluetooth connection and volume control.

[0066] The ear hook 300 also has a second end 320 that connects to the abutment portion 200, and a first end 310 that extends away from the second end 320 to form a protrusion 312. The protrusion 312 extends into the through hole 110a and abuts against the inner sidewall of the housing 110.

[0067] Since the sound-emitting part 100, ear hook 300 and abutment part 200 are separate, the ear hook 300 and the sound-emitting part 100 can be connected together by the abutment of the protrusion 312 against the inner side wall of the housing 110, preventing the sound-emitting part 100 and the ear hook 300 from falling off. In addition, when the sound-emitting part 100 and the ear hook 300 rotate relative to each other, they actually rotate around the axis of the protrusion 312. During this process, the protrusion 312 can always abut against the inner side wall of the housing 110, reducing the possibility of the sound-emitting part 100 and the ear hook 300 falling off.

[0068] Furthermore, an extension plate 311 is formed by extending the first end 310 in a direction away from the central axis of the ear hook 300, and the extension plate 311 covers the groove of the recess 100b and abuts against the mounting part 500 and the support part 600. Therefore, the first end 310 and the protrusion 312 are equivalent to being snapped into the housing 110. In this way, the relative sway between the sound-emitting part 100 and the ear hook 300 can be reduced, ensuring the stability of the headphones when worn.

[0069] Optionally, the protrusion 312 can also be interference-fitted with the inner wall of the through hole 110a, that is, the protrusion 312 abuts against the inner wall of the through hole 110a, which can further ensure the stability of the headphones when worn.

[0070] Based on the previous embodiment, please refer to Figure 4 The protrusion 312 includes a plurality of protrusions 3121, which are distributed circumferentially along the first end 310, and each protrusion 3121 abuts against the inner sidewall of the housing 110.

[0071] The multiple protrusions 3121 can be made of plastic and have a certain degree of elasticity. Thus, when the ear hook 300 is connected to the sound-producing part 100, the multiple protrusions 3121 can deform so that the multiple protrusions 3121 can move closer or further apart. When installing the ear hook 300, external force is used to bring the multiple protrusions 3121 closer together so that they can be inserted into the through hole 110a. After being inserted into the through hole 110a, the external force is removed and the protrusions 3121 return to their original shape. In this way, the connection between the sound-producing part 100 and the ear hook 300 can be achieved without other fasteners.

[0072] In this embodiment, the outer peripheral sidewall of the protrusion 3121 has annular ribs 3122. The side of the ribs 3122 facing the ear hook 300 forms a stepped surface 3122a, and the side facing away from the ear hook 300 forms a guide surface 3122b. Thus, when the ear hook 300 is installed in the sound-generating part 100, the sidewall of the through hole 110a will abut against the guide surface 3122b, and as the protrusion 3121 gradually extends into the through hole 110a, the sidewall of the through hole 110a will squeeze the protrusion. 3121, so that multiple protrusions 3121 are brought close to each other. After the guide surface 3122b enters the receiving cavity, since the sidewall of the through hole 110a no longer presses the guide surface 3122b, the protrusions 3121 can return to their original shape. Thus, the stepped surface 3122a can abut against the inner sidewall of the housing 110, and finally complete the installation of the ear hook 300 and the sound-generating part 100. Due to the presence of the guide surface 3122b, the protrusions 3121 can be guided during installation, improving installation efficiency.

[0073] The ear hook 300 will be described in further detail below.

[0074] The ear hook 300 includes a soft sleeve and a memory metal wire located inside the soft sleeve. The two ends of the soft sleeve are respectively connected to the sound-emitting part 100 and the abutment part 200.

[0075] Soft ear tips can be made of elastic materials such as silicone or TPU (Thermoplastic Urethane). When the soft ear tips come into direct contact with the skin, their soft and skin-friendly texture reduces the pressure on the auricle during prolonged wear and avoids the pain or allergies caused by hard materials.

[0076] The memory metal wire can be made of titanium wire or nickel-titanium alloy wire, etc., which have shape memory properties. Users can manually bend and adjust the curvature of the ear hook 300 to fit the ear shape. After releasing, it can maintain the adjusted shape, ensuring that the ear hook 300 fits the ear contour tightly and is not easy to fall off during movement. The micro-elasticity of the memory metal wire can adapt to dynamic movements such as head rotation or chewing, automatically adjusting the fit and keeping the position of the sound-producing part 100 stable. The stability of the ear hook 300 ensures that the sound outlet 100a of the sound-producing part 100 is always aligned with the ear canal, reducing sound leakage and improving low-frequency response and sound field positioning accuracy.

[0077] The soft sheath wraps around the memory metal wire, preventing the metal from being directly exposed to sweat or corrosive environments, thus delaying oxidation and extending its service life.

[0078] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0079] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An ear clip-on headphone, characterized in that, include: A sound-producing part, wherein the sound-producing part has a sound outlet; abutment; as well as The ear hook connects the sound-emitting part and the abutment part, and provides an elastic force between the sound-emitting part and the abutment part so that the sound-emitting part and the abutment part have a clamping force that holds the auricle on both sides when worn. The ear hook has a first end connected to the sound-producing part, and the first end and the sound-producing part are rotatably connected about the axis of the first end.

2. The ear clip-on earphone according to claim 1, characterized in that, It also includes a latching part and a mounting part, one of which is mounted on the sound-emitting part and the other is mounted on the first end. When the sound-emitting part rotates around the axis of the first end to a preset position, the latching part can lock with the mounting part to restrict the sound-emitting part from continuing to rotate.

3. The ear clip-on earphone according to claim 2, characterized in that, The mounting part includes a plurality of protrusions spaced apart circumferentially along the first end, and a mounting groove is formed between two adjacent protrusions. The latching part is an elastic body, and when the sound-emitting part rotates around the axis of the first end, the latching part can switch between the plurality of mounting grooves.

4. The ear clip-on earphone according to claim 3, characterized in that, The side of the protrusion facing the mounting groove is an outwardly convex arc surface; And / or, the side of the latching part opposite to the first end is a convex arc surface.

5. The ear clip-on earphone according to claim 2, characterized in that, The sound-emitting part has a groove extending circumferentially along the first end, and the mounting part is located in the groove and protrudes from the bottom of the groove.

6. The ear clip-on earphone according to claim 5, characterized in that, The first end extends in a direction away from the central axis of the ear hook to form an extension plate. The buckle is installed on the extension plate, the extension plate covers the groove opening of the groove, and the extension plate abuts against the mounting part.

7. The ear clip-on earphone according to claim 6, characterized in that, The ear clip-on headphones also include a support portion, which is disposed in the groove and connected to the sound-emitting portion. The support portion extends circumferentially along the first end and protrudes from the bottom of the groove. The extension plate abuts against the support portion.

8. The ear clip-on earphone according to claim 1, characterized in that, The sound-emitting part includes a housing, the housing having a receiving cavity, a through hole communicating with the receiving cavity, and a sound outlet communicating with the receiving cavity; The ear hook also has a second end connected to the abutment portion, and the first end extends away from the second end to form a protrusion, the protrusion extending into the through hole and abutting against the inner sidewall of the housing.

9. The ear clip-on earphone according to claim 8, characterized in that, The protrusion includes a plurality of protrusions, which are circumferentially spaced along the first end, and each protrusion abuts against the inner sidewall of the housing.

10. The ear clip-on earphone according to claim 1, characterized in that, The ear hook includes a soft sleeve and a memory metal wire located inside the soft sleeve. The two ends of the soft sleeve are respectively connected to the sound-producing part and the abutment part.

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