Bone conduction vibration sound production device and bone conduction glasses

Abstract

The application discloses a bone conduction vibration sound generating device and bone conduction glasses. The bone conduction vibration sound generating device is in a strip shape as a whole, and comprises a shell, a vibrator, a coil and two elastic members. The shell is provided with a receiving cavity, and the shell is open at both ends along a vibration axis A direction; the vibrator is arranged in the receiving cavity, and the vibrator is loaded into the receiving cavity from the opening of the shell; the coil is fixed opposite to the shell and surrounds the outer periphery of the vibrator, and the outer periphery surface of the shell is provided with a mounting hole for mounting the coil; the two elastic members are connected to the two ends of the vibrator respectively, and the elastic member comprises an outer support connected with the shell. The outer periphery surface of the shell is provided with the mounting hole for mounting the coil, so that the coil can be pushed into the shell from the side of the shell for mounting, and the assembly is more convenient; meanwhile, the overall structure of the bone conduction vibration sound generating device is more compact, and miniaturization is facilitated.

Description

[0001] This application is a divisional application of application number 2022105575989, filed on May 19, 2022, entitled "A bone conduction vibration sound generating device, bone conduction glasses and wearable device". Technical Field

[0002] This invention relates to the field of bone conduction technology, and more particularly to a bone conduction vibration sound-generating device and bone conduction glasses. Background Technology

[0003] Bone conduction is a sound transmission method that uses bones to transmit sound. Wearable devices such as bone conduction headphones and bone conduction glasses use bone conduction vibration devices to generate vibrations, thus enabling people to hear sounds.

[0004] Bone conduction vibration sound generation devices typically include a housing, an oscillator housed within the housing, a spring connecting the housing and the oscillator, and a coil that drives the oscillator to vibrate. The oscillator is magnetic and vibrates under the influence of the magnetic field of the energized coil, and can be reset by the action of the spring.

[0005] The oscillator has a spring plate at one end connected to the outer shell, while the other end is suspended. During vibration, the oscillator may produce a rolling vibration phenomenon that swings from side to side. This phenomenon is particularly prominent when the oscillator is a long and narrow strip. The occurrence of rolling vibration makes the oscillator prone to hitting external components during vibration, producing noise, which not only affects the sound quality but also easily damages the components.

[0006] In addition, the installation space for bone conduction vibration sound generation devices is relatively small. Existing springs often include an annular outer support, a plate located at the center of the outer support, and multiple spring arms connecting the plate and the outer support. The plate is connected to the oscillator, and the oscillator is driven to reset by the elastic force of the spring arms. Due to the small size of bone conduction vibration sound generation devices, the spring arms of existing structures are short in length and narrow in width, which is not conducive to improving the acoustic quality and reliability of bone conduction vibration sound generation devices.

[0007] Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects. Summary of the Invention

[0008] The purpose of this invention is to provide a bone conduction vibration sound generating device and bone conduction glasses, so as to improve the overall compactness of the bone conduction vibration sound generating device.

[0009] To achieve the above-mentioned objectives, in a first aspect, the present invention provides a bone conduction vibration sound generating device, wherein the bone conduction vibration sound generating device is generally strip-shaped and comprises:

[0010] The outer shell has a receiving cavity, and the outer shell has openings at both ends along the vibration axis A. The height direction of the outer shell is consistent with the vibration axis A.

[0011] A vibrator is disposed within the receiving cavity, and the vibrator is inserted into the receiving cavity through the opening of the outer shell;

[0012] A coil, fixed relative to the housing and surrounding the outer periphery of the oscillator, wherein the outer peripheral surface of the housing has mounting holes for mounting the coil; and,

[0013] Two elastic elements are respectively connected to both ends of the oscillator, and each elastic element includes an outer support connected to the outer shell.

[0014] Furthermore, the outer bracket is connected to the end face of the opening end of the outer shell, and the elastic element includes a connecting arm, one end of which is connected to the outer bracket, and the other end extends along the length direction of the elastic element and is connected to the vibrator.

[0015] Furthermore, the coil protrudes out of the receiving cavity and is exposed outside the outer casing.

[0016] Furthermore, the housing is provided with one or more bosses protruding into the mounting hole, the bosses being used to limit the position of the coil in the height direction.

[0017] Furthermore, the coil abuts against the boss, and the coil is bonded to the housing by adhesive. The boss creates a gap between the coil and the surface of the mounting hole to accommodate the adhesive.

[0018] Furthermore, the housing includes a plurality of protrusions, which correspond to the upper and lower end faces of the coil, respectively.

[0019] Furthermore, each of the two long sides and two short sides of the coil is provided with a corresponding boss that abuts against it.

[0020] Furthermore, the boss corresponding to the short side of the coil has a transition surface, which is inclined or arc-shaped.

[0021] Furthermore, the outer shell is integrally formed; or,

[0022] The outer casing includes an upper casing and a lower casing that are connected to each other, and the connecting surfaces of the upper casing and the lower casing pass through the mounting holes.

[0023] Furthermore, the oscillator includes a magnetic plate and two magnets connected to both ends of the magnetic plate, the two magnets being arranged with the same pole facing each other, and the coil surrounding the outer periphery of the magnetic plate; or,

[0024] The oscillator includes a magnetically conductive part and two magnetic parts located on both sides of the magnetically conductive part. The two magnetic parts are arranged with the same pole facing each other, and the coil is wrapped around the outer periphery of the magnetically conductive part.

[0025] Furthermore, the bone conduction vibration sound generating device is used to be installed in the temple of bone conduction glasses, and the aspect ratio of the bone conduction vibration sound generating device is 1.2~8.

[0026] Furthermore, the mounting hole is a blind hole or a through hole;

[0027] The opening of the mounting hole gradually increases outward.

[0028] Furthermore, the housing has two second end faces located at the upper and lower ends, the opening of the housing is located on the second end face, the outer peripheral surface is connected between the two second end faces, and includes two first side faces and two second side faces arranged opposite to each other. The first side faces extend along the length direction of the housing, the second side faces extend along the width direction of the housing, and the mounting hole is provided on the first side face or the second side face.

[0029] Furthermore, the mounting hole is provided on the first side and extends in a direction perpendicular to the first side, and the width of the coil is greater than the width of the opening of the housing.

[0030] In a second aspect, the present invention provides a bone conduction eyeglass, comprising the bone conduction vibration sound-generating device as described in any of the preceding claims.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] According to at least one embodiment of the present invention, the outer peripheral surface of the housing is provided with mounting holes for mounting the coil, so that the coil can be pushed into the housing from the side of the housing for installation, making assembly more convenient, and at the same time making the overall structure of the bone conduction vibration sound generating device more compact, which is conducive to miniaturization.

[0033] According to at least one embodiment of the present invention, elastic elements are provided at both ends of the oscillator to support and limit its movement, which can effectively improve its linearity during vibration and prevent rolling vibration. In addition, the elastic element includes an outer support and a connecting arm extending along the length of the outer support, which can make full use of the limited space and increase the length and width of the connecting arm. On the one hand, the connecting arm can provide a more reliable restoring force, and on the other hand, the connection between the connecting arm and the oscillator can be made more solid, further reducing the rolling vibration phenomenon.

[0034] According to at least one embodiment of the present invention, the connecting part and the base of the connecting arm are respectively located on both sides of the symmetry plane of the oscillator, and the two connecting arms are centrally symmetrical, which can further ensure the length of the connecting arm, and at the same time ensure the balance and symmetry of the force applied by the elastic element to the oscillator, which is beneficial to further avoid the occurrence of rolling vibration. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a bone conduction vibration sound generating device according to one embodiment of the present invention.

[0036] Figure 2 yes Figure 1 A top view of the bone conduction vibration sound-generating device shown.

[0037] Figure 3 It is along Figure 2 A sectional view obtained by cutting along the CC section line.

[0038] Figure 4 This is a schematic diagram of the structure of an elastic element according to one embodiment of the present invention, in which the outer support is ring-shaped.

[0039] Figure 5 yes Figure 4 The front view of the elastic element shown.

[0040] Figure 6 This is a cross-sectional view of a bone conduction vibration sound-generating device according to one embodiment of the present invention, wherein the thickness of the connecting part is greater than the thickness of the elastic part.

[0041] Figure 7 This is a cross-sectional view of a bone conduction vibration sound-generating device according to one embodiment of the present invention, in which the connecting part protrudes toward the vibrator.

[0042] Figure 8 This is a cross-sectional view of a bone conduction vibration sound-generating device according to one embodiment of the present invention. A spacer plate is connected between the connecting part and the vibrator.

[0043] Figure 9 This is a schematic diagram of the structure of an elastic element according to one embodiment of the present invention.

[0044] Figure 10 yes Figure 1 The diagram shows the structural structure of the outer casing of the bone conduction vibration sound generating device.

[0045] Figure 11 yes Figure 1 The diagram shows a three-dimensional cross-sectional view of the outer casing of the bone conduction vibration sound generating device.

[0046] Figure 12 yes Figure 1 The front view of the housing of the bone conduction vibration sound generating device shown.

[0047] Figure 13 This is a schematic diagram of the coil being installed in the mounting hole of the outer casing in this invention.

[0048] Figure 14 This is a schematic diagram of the outer shell of one embodiment of the present invention. The outer shell includes an upper shell and a lower shell.

[0049] Figure 15 This is a schematic diagram showing the positions of the oscillator and coil according to one embodiment of the present invention. The oscillator in the diagram is composed of multiple connected parts.

[0050] Figure 16 This is a schematic diagram of the positions of the oscillator and coil in one embodiment of the present invention. The oscillator in the diagram is a single component. Detailed Implementation

[0051] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0052] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0053] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0054] like Figures 1 to 15 As shown, a bone conduction vibration sound generating device corresponding to a preferred embodiment of the present invention includes a housing 1, an oscillator 2, a coil 3, and an elastic element 4.

[0055] The bone conduction vibration sound generating device is strip-shaped as a whole. Correspondingly, its vibrator 2, coil 3, and elastic element 4 are also strip-shaped, and the length directions of the bone conduction vibration sound generating device, outer shell 1, vibrator 2, coil 3, and elastic element 4 are consistent. Figure 2 The middle arrow B indicates the length direction. Understandably, a strip-shaped bone conduction vibration sound generator is more suitable for installation in a strip-shaped space. For example, for bone conduction glasses, a strip-shaped bone conduction vibration sound generator is more suitable for installation inside a strip-shaped temple, and has less impact on the shape of the temple.

[0056] The outer casing 1 serves as the mounting carrier for the oscillator 2, coil 3, and elastic element 4, and it is provided with a receiving cavity 10. The outer casing 1 can be made of materials such as plastic, aluminum, or stainless steel.

[0057] The vibrator 2 is disposed within the receiving cavity 10. When the bone conduction vibration sound generating device is working, the vibrator 2 can vibrate along the vibration axis A. As a preferred embodiment, the outer shell 1 has openings at both ends along the vibration axis A, and the area of ​​the openings is larger than the cross-sectional area of ​​the vibrator 2, so that the vibrator 2 can be inserted into the receiving cavity 10 through the openings, making assembly more convenient.

[0058] Coil 3 is fixed relative to the outer casing 1 and surrounds the oscillator 2. It is energized to generate a changing magnetic field, which in turn causes the oscillator 2 to vibrate under the interaction of the magnetic field. In other words, coil 3 drives the oscillator 2 to vibrate. Figure 1 As shown, a flexible circuit board 5 is provided on the outside of the outer casing 1 and is connected to the coil 3 by a wire. The flexible circuit board 5 is connected to an external control circuit, and the coil 3 drives the oscillator 2 to vibrate under the control of the external control circuit.

[0059] like Figure 1 , Figure 3 and Figure 4 As shown, there are two elastic elements 4, which are respectively connected to the two ends of the oscillator 2. In some embodiments, the two ends of the oscillator 2 along the vibration direction (i.e., the vibration axis direction) are flat first end faces 24, and the two connecting arms 41 are respectively connected to the two first end faces 24, for example, by welding or bonding. The elastic element 4 is generally sheet-like, and includes an outer support 40 and connecting arms 41. The outer support 40 is connected to the outer shell 1, and one end of the connecting arm 41 is connected to the outer support 40, and the other end extends along the length of the elastic element 4 and is connected to the oscillator 2. During vibration, the connecting arm 41 provides the elastic force to drive the oscillator 2 to return to its original position. The elastic element 4 can be made of materials such as stainless steel, plastic, or beryllium copper.

[0060] Since both ends of the oscillator 2 are supported and limited by the elastic elements 4, compared to the case where one end is suspended, the oscillator 2 can reliably perform linear vibration and is less prone to rolling vibration. Simultaneously, because the connecting arm 41 extends along the length of the elastic element 4, its length can be made longer, and the amount of elastic deformation is correspondingly greater, which is beneficial for increasing the amplitude and improving the low-frequency effect. Furthermore, the width of the connecting arm 41 can also be made larger, resulting in a larger connection area with the oscillator 2 and a more robust connection.

[0061] like Figure 4 As shown, the connecting arm 41 is generally sheet-like, comprising a base 411 connected to the outer support 40, a connecting portion 410 connected to the vibrator 2, and an elastic portion 412 connecting the base 411 and the connecting portion 410. During the vibration of the vibrator 2, the base 411 remains stationary, the connecting portion 410 vibrates with the vibrator 2, and the elastic portion 412 elastically deforms with the displacement of the vibrator 2, providing a spring force to drive the vibrator 2 to return to its original position. The connecting arm 41 extends from the base 411 along the length of the elastic member 4, thereby obtaining a longer elastic portion 412, and the length of the connecting portion 410 can also be adjusted as needed. In addition, since the space between the outer supports 40 can be fully utilized, the width of the elastic portion 412 and the connecting portion 410 can be made larger, thereby improving the stiffness and strength of the elastic portion 412, increasing the firmness of the connection between the connecting portion 410 and the vibrator 2, and making the bone conduction vibration sound generation device more reliable.

[0062] In addition to controlling the width of the elastic part 412, the strength and rigidity of the elastic part 412 can also be adjusted by providing a hollow hole 414 on the elastic part 412.

[0063] In some embodiments, reference Figure 3 The oscillator 2 is a symmetrical body, which includes a symmetrical plane 2a perpendicular to its length direction (the symmetrical plane 2a coincides with the vibration axis A in the figure). The connecting part 410 and the base 411 of the elastic element 4 are located on both sides of the symmetrical plane 2a, so that the connecting arm 41 is longer. It can be understood that when the base 411 is connected to the end of the outer support 40 in the length direction, a longer connecting arm 41 can be obtained. Of course, the specific length of the connecting arm 41 can be adjusted according to actual needs.

[0064] Since the connecting portion 410 and the base portion 411 are located on opposite sides of the symmetry plane 2a, in order to make the force on the oscillator 2 more symmetrical and balanced, the connecting arms 41 of the two elastic elements 4 are set to be centrally symmetrical, symmetrical about the center of gravity of the oscillator 2 (the center of gravity of the oscillator 2 coincides with its geometric center). This makes the distances of the two connecting portions 410 from the center of gravity of the oscillator 2 equal, and the force applied by the elastic elements 4 to the upper and lower end faces of the oscillator 2 is more balanced and symmetrical. Furthermore, the projection of the connecting arm 41 along the vibration axis A is basically located within the first end face 24 of the oscillator 2, which can further avoid rolling vibration. More preferably, the two elastic elements 4 are set to be centrally symmetrical.

[0065] It is understandable that when the connecting part 410 is closer to the end of the oscillator 2 along its length, a longer connecting arm 41 can often be obtained.

[0066] The oscillator 2 requires a certain vibration space during vibration and must avoid interference with the base 411 and elastic part 412 of the connecting arm 41. In a first preferred embodiment, refer to... Figures 3 to 5 The elastic portion 412 is inclined toward the side where the oscillator 2 is located, so that the connecting portion 410 and the elastic portion 412 protrude from the outer support 40 into the receiving cavity 10, thereby forming a space between the connecting portion 410 and the outer support 40 for the oscillator 2 to vibrate. In the second preferred embodiment, referring to... Figure 6 The connecting arm 41 is flat, with the connecting portion 410 and the elastic portion 412 located on the same plane. The thickness of the connecting portion 410 is set to be greater than the thickness of the elastic portion 412, and it protrudes relative to the elastic portion 412 toward the side where the oscillator 2 is located. Thus, the oscillator 2 and the elastic portion 412 are separated by the connecting portion 410, forming a space for their vibration. In a third preferred embodiment, the connecting portion 410 protrudes relative to the elastic portion 412 toward the side where the oscillator 2 is located by bending, thereby forming a space for the oscillator 2 to vibrate. In this embodiment, the thickness of the connecting portion 410 can be less than, greater than, or equal to the thickness of the elastic portion 412. In a fourth preferred embodiment, refer to... Figure 8 The difference between this embodiment and the second preferred embodiment is that the connecting part 410 and the elastic part 412 have the same thickness. By providing a spacer 413 between the connecting part 410 and the oscillator 2 to separate the oscillator 2 and the elastic part 412, a space for the oscillator 2 to vibrate is formed.

[0067] As a preferred embodiment, refer to Figures 3 to 5The outer casing 1 has openings at both ends along the vibration direction of the oscillator 2. For ease of description, the end face of the opening is referred to as the second end face 14. The outer supports 40 of the two elastic elements 4 are respectively connected to the second end face 14. The connection method can be, for example, adhesive bonding or welding. The outer support 40 includes a first surface 400 connected to the second end face 14 and a second surface 401 arranged parallel to the first surface 400. When the bone conduction vibration sound generating device is installed, it can be connected to external parts through its outer support 40, such as a panel of a wearable device for contact with the face, thereby transmitting vibration to the panel. Preferably, during the vibration of the oscillator 2, the connecting arm 41 does not extend beyond the second surface 401 of the outer support 40. In this way, the parts connected to the outer support 40 do not need to have a structure to avoid the connecting arm 41, which simplifies the structure. Obviously, in Figures 3 to 5 In the embodiment where the elastic part 421 is tilted, the connecting arm 41 can be adjusted so that it does not exceed the outer support 40 during vibration by controlling the distance between the outer support 40 and the vibrator 2 located in the original position.

[0068] like Figure 9 As shown, the outer bracket 40 is used to fix the elastic element 4 to the outer shell 1. It includes two first rods 402, and a base 411 is connected between the two first rods 402. Preferably, the two first rods 402 are arranged in parallel, and the base 411 is connected to both first rods 402. The lengths of the two first rods 402 can be the same or different. In a preferred embodiment, the two first rods 402 of the outer bracket 40 can be independent parts and are not connected to each other. In another preferred embodiment, the outer bracket 40 is ring-shaped and also includes second rods 403 respectively connected between the two first rods 402, such as... Figure 4 As shown, the ends of the two first rods 402 are connected to the second rods 403, and the entire outer support 40 is in the shape of a rectangular ring. When the outer support 40 is in the shape of a ring, its structural strength and rigidity are better, and the connection between it and the outer support 40 is usually more secure.

[0069] The outer casing 1 has two second end faces 14 located at the upper and lower ends, and an outer peripheral surface connecting the two second end faces 14, such as Figures 10 to 13 As shown, taking the case where the outer shell 1 has a cuboid shape as an example, its outer peripheral surface includes two opposing first side surfaces 15 and two opposing second side surfaces 16. The first side surfaces 15 extend along the length direction of the outer shell 1, and the second side surfaces 16 extend along the width direction of the outer shell 1. The height direction of the outer shell 1 is consistent with the vibration axis A. The outer peripheral surface of the outer shell 1 is provided with mounting holes 12 for mounting the coil 3. In this embodiment, the mounting holes 12 are provided on the first side surfaces 15. In other embodiments, they may also be provided on the second side surfaces 16.

[0070] In a preferred embodiment, the mounting hole 12 is a blind hole, which is formed on the first side 15 and extends in a direction perpendicular to the first side 15, but does not connect to the other side of the first side 15. In this embodiment, the coil 3 is installed by pushing it all the way into the mounting hole 12. In another preferred embodiment, such as Figure 13 As shown, the mounting hole 12 is a through hole that penetrates the outer casing 1 and connects the two first side surfaces 15. In this embodiment, the coil 3 can be pushed in from both sides of the outer casing 1 for installation.

[0071] To facilitate the insertion of the coil 3, the opening of the mounting hole 12 is funnel-shaped, that is, the opening of the mounting hole 12 gradually increases outward, so as to guide the coil 3 into the mounting hole 12 and facilitate the assembly of the coil 3.

[0072] Further, refer to Figures 11 to 13 The outer casing 1 is provided with one or more bosses 13 protruding into the mounting hole 12. The bosses 13 protrude along the vibration axis A of the vibrator 2, thereby reducing the distance in the height direction of the mounting hole 12 and limiting the coil 3 in the height direction. The outer casing 1 may only have bosses 13 opposite to the upper end face 30 of the coil 3, or only have bosses 13 opposite to the lower end face 31 of the coil 3, or multiple bosses 13 may be provided simultaneously, corresponding to the upper end face 30 and the lower end face 31 of the coil 3 respectively. By providing bosses 13, the position of the coil 3 in the height direction can be more accurately defined, while reducing the fitting accuracy between the coil 3 and other parts of the mounting hole 12, and reducing processing costs. Preferably, the coil 3 abuts against the bosses 13. The coil 3 and the outer casing 1 are preferably connected by adhesive. Providing bosses 13 also helps to form a gap between the coil 3 and the surface of the mounting hole 12 to accommodate adhesive, making the installation of the coil 3 more secure.

[0073] In a preferred embodiment, the outer casing 1 includes two sets of bosses located on the upper and lower sides of the coil 3, respectively. Each set of bosses includes four bosses 13, which respectively abut against the two long sides and two short sides of the coil 3, providing a better limiting effect. Figure 11 and Figure 13 As shown, the boss 13 corresponding to the short side is provided with a transition surface 130. The transition surface 130 can be inclined or arc-shaped to further guide the coil 3 into the mounting hole 12.

[0074] Understandably, since the coil 3 can protrude out of the receiving cavity 10 of the outer shell 1, and its outer periphery is not completely surrounded by the outer shell 1, space can be utilized more fully, the overall structure can be made more compact, and the miniaturization of the bone conduction vibration sound generation device can be facilitated. In addition, the coil 3 is exposed outside the outer shell 1, which improves its heat dissipation effect.

[0075] In addition to being a one-piece structure (molded in one piece), the outer shell 1 can also be formed by connecting multiple parts, preferably, such as Figure 14 As shown, it includes an upper housing 17 and a lower housing 18, which are connected together. The connecting surface 19 of the two housings passes through a mounting hole 12, such that the mounting hole 12 is at least partially located on one of the housings and opens from the connecting surface 19. In this way, when installing the coil 3, the coil 3 can be assembled into the mounting hole 12 of the upper housing 17 or the lower housing 18 first, and then the other housing can be welded to the first housing to form the outer shell 1, realizing the assembly of the coil 3 within the outer shell 1. This simplifies the assembly process and facilitates assembly.

[0076] In a preferred embodiment, such as Figure 15 As shown, the oscillator 2 is composed of multiple connected parts. Specifically, it includes a magnetic plate 20 and two magnets 21 connected to both ends of the magnetic plate 20. The two magnets 21 are arranged with their same poles facing each other; for example, the N poles of the two magnets 21 are adjacent, and the S poles are located at the two ends of the oscillator 2. A coil 3 is wrapped around the outer periphery of the magnetic plate 20, allowing the magnetic field lines of the two magnets 21 to pass through the coil 3 more concentratedly, thereby improving the magnetic field utilization rate and increasing the sensitivity and driving force of the oscillator 2. Preferably, the upper and lower ends of the coil 3 extend beyond the magnetic plate 20 and wrap around the outside of the two magnets 21 to further improve the magnetic field utilization rate.

[0077] In another preferred embodiment, reference Figure 16 The oscillator 2 is a single component, which has a magnetically conductive part 22 and two magnetic parts 23 located on both sides of the magnetically conductive part 22 by magnetizing the magnetically conductive material. Figure 16 The boundary between the magnetic conductive part 22 and the magnetic part 23 is shown by a dashed line. The magnetic conductive part 22 is non-magnetic, while the two magnetic parts 23 are magnetic and arranged with their like poles facing each other. The coil 3 is wrapped around the outer periphery of the magnetic conductive part 22. Preferably, the upper and lower ends of the coil 3 extend beyond the magnetic conductive part 22 and wrap around the outside of the two magnetic parts 23 to improve the utilization rate of the magnetic field.

[0078] This invention also proposes a bone conduction eyeglass, which includes the bone conduction vibration sound-generating device described above. The bone conduction eyeglass also includes strip-shaped temples, and the bone conduction vibration sound-generating device is strip-shaped and disposed within the temples. Because the bone conduction vibration sound-generating device is strip-shaped and conforms to the shape of the temples, the cross-sectional area of ​​the temples can be effectively reduced, making the bone conduction eyeglasses more comfortable to wear.

[0079] In a preferred embodiment, the aspect ratio (the ratio of length a to width b) of the bone conduction vibration sound-generating device is 1.2 to 8; more preferably, it is any value between 3 and 5; and even more preferably, it is 4. Setting a suitable aspect ratio helps improve the performance of the bone conduction vibration sound-generating device while making full use of space. Obviously, because the bone conduction vibration unit has a large aspect ratio and a small width and thickness, the temples can be made thinner, resulting in more comfortable, lightweight, and aesthetically pleasing wear.

[0080] The present invention also proposes a wearable device, which may be, for example, headphones, glasses, helmets or other devices suitable for wearing on the head, including the bone conduction vibration sound generation device described above.

[0081] The above are merely specific embodiments of the present invention, and any improvements made based on the concept of the present invention shall be considered within the scope of protection of the present invention.

Claims

1. A bone conduction vibration sound generating device, characterized in that, The bone conduction vibration sound generating device is generally strip-shaped and includes: The outer shell (1) is provided with a receiving cavity (10). The outer shell (1) has openings at both ends along the vibration axis A. The height direction of the outer shell (1) is consistent with the vibration axis A. The oscillator (2) is disposed in the receiving cavity (10), and the oscillator (2) is inserted into the receiving cavity (10) through the opening of the outer shell (1); A coil (3) is fixed relative to the outer casing (1) and surrounds the outer periphery of the oscillator (2). The outer periphery of the outer casing (1) has mounting holes (12) for mounting the coil (3); and... Two elastic elements (4) are respectively connected to the two ends of the vibrator (2), and the elastic elements (4) include an outer bracket (40) connected to the outer shell (1).

2. The bone conduction vibration sound generating device as described in claim 1, characterized in that, The outer bracket (40) is connected to the end face of the opening end of the outer shell (1). The elastic element (4) includes a connecting arm (41), one end of which is connected to the outer bracket (40), and the other end extends along the length direction of the elastic element (4) and is connected to the vibrator (2).

3. The bone conduction vibration sound generating device as described in claim 1, characterized in that, The coil (3) protrudes out of the receiving cavity (10) and is exposed outside the outer shell (1).

4. The bone conduction vibration sound generating device as described in claim 1, characterized in that, The housing (1) is provided with one or more bosses (13) protruding into the mounting hole (12), the bosses (13) being used to limit the position of the coil (3) in the height direction.

5. The bone conduction vibration sound generating device as described in claim 4, characterized in that, The coil (3) abuts against the boss (13), and the coil (3) is connected to the outer shell (1) by adhesive. The boss (13) forms a gap between the coil (3) and the surface of the mounting hole (12) to accommodate the adhesive.

6. The bone conduction vibration sound generating device as described in claim 4, characterized in that, The outer casing (1) includes a plurality of protrusions (13), which correspond to the upper end face (30) and the lower end face (31) of the coil (3), respectively.

7. The bone conduction vibration sound generating device as described in claim 6, characterized in that, The coil (3) has a corresponding boss (13) on both long sides and both short sides.

8. The bone conduction vibration sound generating device as described in claim 7, characterized in that, The boss (13) corresponding to the short side of the coil (3) has a transition surface (130), which is inclined or arc-shaped.

9. The bone conduction vibration sound generating device as described in claim 1, characterized in that, The outer shell (1) is integrally formed; or, The outer casing (1) includes an upper casing (17) and a lower casing (18) connected to each other, and the connecting surface (19) of the upper casing (17) and the lower casing (18) passes through the mounting hole (12).

10. The bone conduction vibration sound generating device as described in claim 1, characterized in that, The oscillator (2) includes a magnetic plate (20) and two magnets (21) connected to both ends of the magnetic plate (20). The two magnets (21) are arranged with the same pole facing each other, and the coil (3) is wrapped around the outer periphery of the magnetic plate (20); or, The oscillator (2) includes a magnetic conductive part (22) and two magnetic parts (23) located on both sides of the magnetic conductive part (22). The two magnetic parts (23) are arranged opposite each other with the same pole, and the coil (3) surrounds the outer periphery of the magnetic conductive part (22).

11. The bone conduction vibration sound generating device as described in claim 1, characterized in that, The bone conduction vibration sound generating device is used to be installed in the temple of bone conduction glasses, and the aspect ratio of the bone conduction vibration sound generating device is 1.2~8.

12. The bone conduction vibration sound generating device as described in claim 1, characterized in that, The mounting hole (12) is a blind hole or a through hole; The opening of the mounting hole (12) gradually increases outward.

13. The bone conduction vibration sound generating device according to any one of claims 1 to 12, characterized in that, The outer casing (1) has two second end faces (14) located at the upper and lower ends. The opening of the outer casing (1) is located on the second end face (14). The outer peripheral surface is connected between the two second end faces (14) and includes two first side faces (15) and two second side faces (16) arranged opposite to each other. The first side face (15) extends along the length direction of the outer casing (1), and the second side face (16) extends along the width direction of the outer casing (1). The mounting hole (12) is provided on the first side face (15) or the second side face (16).

14. The bone conduction vibration sound generating device as described in claim 13, characterized in that, The mounting hole (12) is provided on the first side (15) and extends in a direction perpendicular to the first side (15). The width of the coil (3) is greater than the width of the opening of the housing (1).

15. A bone conduction eyeglass, characterized in that, Includes the bone conduction vibration sound generating device as described in any one of claims 1 to 14.

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