Bone conduction vibration sounding device and wearable equipment

Abstract

The utility model discloses a bone conduction vibration sounding device and wearable equipment. The bone conduction vibration sounding device comprises a shell, a vibration assembly, a coil and two elastic pieces. The shell is provided with a containing cavity, a flexible circuit board connected with the coil is arranged outside the shell, and the flexible circuit board is arranged at one end of the shell in the length direction and used for being connected with an external control circuit. The vibration assembly is arranged in the containing cavity. The coil is fixed relative to the housing and surrounds the periphery of the vibration assembly. The two elastic pieces are connected to the two ends of the vibration assembly respectively and connected with the shell. According to the utility model, the two ends of the vibration assembly are provided with the elastic pieces for supporting and limiting the vibration assembly, so that the linearity of the vibration assembly during vibration can be effectively improved, and the rolling vibration phenomenon is prevented.

Description

[0001] Priority information: This application claims priority to Chinese patent application No. 202210557598.9, filed on May 19, 2022. Technical Field

[0002] This utility model relates to the field of bone conduction technology, and in particular to a bone conduction vibration sound generating device and wearable device. 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, a vibration component housed within the housing, a spring connecting the housing and the vibration component, and a coil that drives the vibration component to vibrate. The vibration component is magnetic, vibrates under the magnetic field of the energized coil, and can be reset by the action of the spring.

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

[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 vibration component, and the vibration component 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. Utility Model Content

[0008] The purpose of this invention is to provide a bone conduction vibration sound-generating device and wearable device that can reduce the rolling vibration phenomenon during the vibration process of the vibration component.

[0009] To achieve the aforementioned objectives, in a first aspect, this utility model proposes a bone conduction vibration sound-generating device, comprising:

[0010] The outer casing has a receiving cavity;

[0011] A vibration assembly is disposed within the receiving cavity;

[0012] A coil, fixed relative to the housing and surrounding the periphery of the vibration assembly, has a flexible circuit board connected to the coil disposed outside the housing. The flexible circuit board is located at one end of the housing along its length and is used to connect to an external control circuit.

[0013] Two elastic elements are respectively connected to both ends of the vibration assembly and are both connected to the outer shell.

[0014] Secondly, this utility model proposes a wearable device, including the bone conduction vibration sound-generating device as described above.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] According to some embodiments of this utility model, elastic elements are provided at both ends of the vibration component to support and limit its movement, which can effectively improve its linearity during vibration and prevent rolling vibration. Furthermore, according to some embodiments of this utility model, the elastic element includes an outer support and a connecting arm extending along the length of the outer support. This makes full use of limited space, increasing the length and width of the connecting arm. On the one hand, this allows the connecting arm to provide a more reliable restoring force; on the other hand, it makes the connection between the connecting arm and the vibration component more robust, further reducing rolling vibration. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a bone conduction vibration sound generating device according to one embodiment of this utility model.

[0018] Figure 2 yes Figure 1 A top view of the bone conduction vibration sound-generating device shown.

[0019] Figure 3 It is along Figure 2 A sectional view obtained by cutting along the CC section line.

[0020] 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.

[0021] Figure 5 yes Figure 4 The front view of the elastic element shown.

[0022] Figure 6 This is a cross-sectional view of a bone conduction vibration sound-generating device according to one embodiment of the present invention. In the figure, the thickness of the connecting part is greater than the thickness of the elastic part.

[0023] Figure 7This 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 vibration component.

[0024] 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 vibration component in the figure.

[0025] Figure 9 This is a schematic diagram of the structure of an elastic element according to one embodiment of this utility model.

[0026] Figure 10 yes Figure 1 The diagram shows the structural structure of the outer casing of the bone conduction vibration sound generating device.

[0027] 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.

[0028] Figure 12 yes Figure 1 The front view of the housing of the bone conduction vibration sound generating device shown.

[0029] Figure 13 This is a schematic diagram of the coil being installed in the mounting hole of the outer casing in this utility model.

[0030] 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.

[0031] Figure 15 This is a schematic diagram showing the positions of the vibration component and the coil in one embodiment of the present invention. The vibration component is composed of multiple connected parts.

[0032] Figure 16 This is a schematic diagram showing the positions of the vibration component and the coil in one embodiment of this utility model. The vibration component in the diagram is a single part.

[0033] Figure 17 This is a schematic diagram showing the positions of the vibration component and the coil in one embodiment of the present invention. In the diagram, there are two coils. Detailed Implementation

[0034] 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.

[0035] The terms "comprising" and "having," and any variations thereof, 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.

[0036] In this document, the reference to "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.

[0037] 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, a vibration component 2, a coil 3, and an elastic element 4.

[0038] The bone conduction vibration sound generator is strip-shaped as a whole. Correspondingly, its vibration component 2, coil 3, and elastic element 4 are also strip-shaped. Furthermore, the lengths of the bone conduction vibration sound generator, housing 1, vibration component 2, coil 3, and elastic element 4 are aligned. 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.

[0039] The outer casing 1 serves as the mounting carrier for the vibration assembly 2, the coil 3, and the 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.

[0040] Vibration component 2 is disposed within the receiving cavity 10. When the bone conduction vibration sound generating device is working, vibration component 2 can vibrate along the vibration axis A. In 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 ​​vibration component 2, so that vibration component 2 can be inserted into the receiving cavity 10 through the openings, making assembly more convenient.

[0041] Coil 3 is fixed relative to the outer shell 1 and surrounds the outer periphery of the vibrating component 2. It is energized to generate a changing magnetic field, which in turn causes the vibrating component 2 to vibrate under the interaction with the magnetic field. In other words, coil 3 drives the vibration of the vibrating component 2. Figure 1 As shown, a flexible circuit board 5 is provided on the outside of the outer shell 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 vibration component 2 to vibrate under the control of the external control circuit.

[0042] like Figure 1 , Figure 3 and Figure 4 As shown, there are two elastic elements 4, which are respectively connected to both ends of the vibration assembly 2. In some embodiments, the two ends of the vibration assembly 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, while the other end extends along the length of the elastic element 4 and is connected to the vibration assembly 2. During vibration, the connecting arm 41 provides the elastic force to drive the vibration assembly 2 to reset. The elastic element 4 can be made of materials such as stainless steel, plastic, or beryllium copper.

[0043] Since both ends of the vibration component 2 are supported and limited by the elastic elements 4, compared to the case where one end is suspended, the vibration component 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 vibration component 2 and a more robust connection.

[0044] like Figure 4As shown, the connecting arm 41 is generally sheet-shaped, including a base 411 connected to the outer support 40, a connecting portion 410 connected to the vibration component 2, and an elastic portion 412 connecting the base 411 and the connecting portion 410. During the vibration of the vibration component 2, the base 411 remains stationary, the connecting portion 410 vibrates with the vibration component 2, and the elastic portion 412 elastically deforms with the displacement of the vibration component 2, providing a spring force to drive the vibration component 2 to return to its original position. The connecting arm 41 extends from the base 411 along the length direction of the elastic element 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, improving the firmness of the connection between the connecting portion 410 and the vibration component 2, and making the bone conduction vibration sound generation device more reliable.

[0045] In addition to controlling the width of the elastic part 412, the strength and stiffness of the elastic part 412 can also be adjusted by setting a perforated hole 414 on the elastic part 412. The number of perforated holes 414 can be one or more. By controlling the area of ​​the perforated hole 414, the strength and stiffness of the elastic part 412 can be changed.

[0046] In some embodiments, reference Figure 3 The vibration component 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 member 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.

[0047] 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 vibration assembly 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 vibration assembly 2 (the center of gravity of the vibration assembly 2 coincides with its geometric center). This makes the distances of the two connecting portions 410 from the center of gravity of the vibration assembly 2 equal, and the force applied by the elastic elements 4 to the upper and lower end faces of the vibration assembly 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 vibration assembly 2, which can further avoid rolling vibration. More preferably, the two elastic elements 4 are set to be centrally symmetrical.

[0048] It is understandable that when the connecting part 410 is closer to the end of the vibrating component 2 along its length, a longer connecting arm 41 can often be obtained.

[0049] The vibration component 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 vibration assembly 2 is located, so that the connecting portion 410 and the elastic portion 412 protrude from the outer bracket 40 into the receiving cavity 10, thereby forming a space between the connecting portion 410 and the outer bracket 40 for the vibration assembly 2 to vibrate. In the second preferred embodiment, referring to... Figure 6 The connecting arm 41 is flat, and the connecting portion 410 and the elastic portion 412 are 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 vibration assembly 2 is located. In this way, the vibration assembly 2 and the elastic portion 412 are separated by the connecting portion 410, forming a space for their vibration. In the third preferred embodiment, refer to Figure 7 The connecting portion 410 protrudes relative to the elastic portion 412 toward the side where the vibration assembly 2 is located by bending, thereby forming a space for the vibration assembly 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 the 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 vibration component 2 to separate the vibration component 2 and the elastic part 412, a space for the vibration component 2 to vibrate is formed.

[0050] As a preferred embodiment, refer to Figures 3 to 5 The outer casing 1 has openings at both ends along the vibration direction of the vibration component 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 vibration component 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 vibration component 2 located in the original position.

[0051] likeFigure 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 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 the outer support 40 and the ring is usually more secure. Optionally, as... Figure 4 , Figure 9 and Figure 10 As shown, the receiving cavity 10 has a wider portion 10a at both ends in the length direction, with a width W1 greater than the width W2 of the rest of the receiving cavity 10, and the wider portion 10a is connected to the second end face 14 of the adjacent outer shell 1; the width W3 at both ends of the cavity 404 of the outer bracket 40 for receiving the connecting arm 41 is greater than the width W4 of the rest of the cavity 404. When the outer bracket 40 is annular, the cavity 404 of the outer bracket 40 for receiving the connecting arm 41 is the inner hole of the outer bracket 40.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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 vibration assembly 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.

[0056] 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.

[0057] 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.

[0058] 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 14As 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.

[0059] In a preferred embodiment, such as Figure 15 As shown, the vibration assembly 2 is composed of multiple parts connected together. 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 vibration assembly 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 vibration sensitivity and driving force of the vibration assembly 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. Figure 15 In the embodiment shown, the magnet 21 and the magnetic plate 20 are arranged along the vibration direction of the vibration assembly 2.

[0060] In a preferred embodiment, reference Figure 16 The vibration component 2 is a single, integrated part. It forms 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. The magnetically conductive part 22 and the magnetic parts 23 are both part of the vibration component 2, rather than a single part. 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. Figure 16 In the embodiment shown, the magnetic part 23 and the magnetic conductive part 22 are arranged along the vibration direction of the vibration assembly 2.

[0061] In a preferred embodiment, reference Figure 17The vibration assembly 2 includes a magnet 21 and magnetic plates 20. There are at least two magnetic plates 20, and adjacent magnetic plates 20 are connected by a magnet 21, meaning that both ends of the magnet 21 are connected to magnetic plates 20. The magnet 21 is magnetized along the vibration direction, and the magnetic plates 20 and the magnet 21 are arranged along the vibration direction. In this embodiment, at least one magnetic plate 20 has a coil 3 surrounding its outer periphery. Preferably, both magnetic plates 20 have a coil 3 surrounding their outer periphery, and the current directions in adjacent coils 3 are opposite at any given time. It is understood that the structure of the housing 1 can be adaptively modified; for example, the number and position of the mounting holes 12 can be changed accordingly to accommodate the corresponding coils 3. Furthermore, in this embodiment, the vibration assembly 2 can be either a separate unit or a single unit.

[0062] This invention also proposes a bone conduction eyeglass, which includes the bone conduction vibration and sound generation device described above. The bone conduction eyeglass also includes strip-shaped temples, and the bone conduction vibration and sound generation device is strip-shaped and disposed within the temples. Because the bone conduction vibration and sound generation 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.

[0063] In a preferred embodiment, the aspect ratio (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.

[0064] This utility model also proposes a wearable device, such as headphones, glasses, helmets, or other devices suitable for wearing on the head, which includes the bone conduction vibration sound generation device described above.

[0065] The above are merely specific embodiments of this utility model. Any improvements made based on the concept of this utility model shall be considered within the scope of protection of this utility model.

Claims

1. A bone conduction vibration sound generating device, characterized in that, include: The outer shell (1) has a receiving cavity (10); Vibration assembly (2) is disposed within the receiving cavity (10); A coil (3) is fixed relative to the outer shell (1) and surrounds the outer periphery of the vibration assembly (2). A flexible circuit board (5) connected to the coil (3) is provided outside the outer shell (1). The flexible circuit board (5) is located at one end of the length direction of the outer shell (1) and is used to connect to an external control circuit. Two elastic elements (4) are respectively connected to both ends of the vibration assembly (2) and are both connected to the outer shell (1).

2. The bone conduction vibration sound generating device as described in claim 1, characterized in that, The bone conduction vibration sound generating device is strip-shaped, and the vibration component (2), the coil (3) and the elastic element (4) are also strip-shaped. The length directions of the bone conduction vibration sound generating device, the outer shell (1), the vibration component (2), the coil (3) and the elastic element (4) are consistent.

3. The bone conduction vibration sound generating device as described in claim 1, characterized in that, Two elastic elements (4) are respectively connected to the two ends of the vibration assembly (2) along the vibration direction. The outer shell (1) has openings at both ends along the vibration direction of the vibration assembly (2) so that the vibration assembly (2) can be inserted into the receiving cavity (10) through the openings. The elastic element (4) includes an outer support (40) and a connecting arm (41). The outer support (40) is connected to the end face of the opening end of the outer shell (1). One end of the connecting arm (41) is connected to the outer support (40), and the other end is connected to the vibration assembly (2).

4. The bone conduction vibration sound generating device as described in claim 3, characterized in that, The connecting arm (41) extends along the length of the elastic member (4).

5. The bone conduction vibration sound generating device as described in claim 3, characterized in that, The connecting arm (41) includes a base (411) connected to the outer support (40), a connecting portion (410) connected to the first end face (24) of the vibration assembly (2), and an elastic portion (412) connecting the base (411) and the connecting portion (410). The connecting arm (41) extends from the base (411) along the length direction of the elastic member (4).

6. The bone conduction vibration sound generating device as described in claim 3, characterized in that, The vibration assembly (2) includes a symmetry plane (2a) perpendicular to its length direction. The connecting part (410) and the base (411) of the elastic element (4) are located on both sides of the symmetry plane (2a), and the connecting arms (41) of the two elastic elements (4) are symmetrical about the center of gravity of the vibration assembly (2).

7. The bone conduction vibration sound generating device as described in claim 3, characterized in that, The elastic part (412) is inclined toward the side where the vibration assembly (2) is located; or, The connecting portion (410) protrudes relative to the elastic portion (412) toward the side where the vibration assembly (2) is located; or, A spacer plate (413) is connected between the connecting part (410) and the vibration assembly (2).

8. The bone conduction vibration sound generating device as described in claim 3, characterized in that, The outer support (40) includes a first surface (400) connected to the outer shell (1) and a second surface (401) disposed opposite to the first surface (400). During the vibration of the vibration assembly (2), the connecting arm (41) does not extend beyond the second surface (401) of the outer support (40).

9. The bone conduction vibration sound generating device as described in claim 3, characterized in that, The receiving cavity (10) has a wider portion (10a) at both ends in the length direction, with a width W1 greater than the width W2 of the rest of the receiving cavity (10), and the wider portion (10a) is connected to the end face of the opening end of the adjacent outer shell (1). The width W3 of the two ends of the cavity in the longitudinal direction of the outer support (40) for accommodating the connecting arm (41) is greater than the width W4 of the rest of the cavity.

10. The bone conduction vibration sound generating device as described in claim 5, characterized in that, The outer support (40) is ring-shaped and includes two first rods (402) arranged opposite to each other and two second rods (403) respectively connected between the two first rods (402). The first rods (402) and the second rods (403) extend along the length and width directions of the bone conduction vibration sound generating device, respectively. The base (411) is connected between the two first rods (402) and does not contact the second rods (403).

11. The bone conduction vibration sound generating device as described in claim 5, characterized in that, The elastic part (412) has at least one hollow hole (414), and the stiffness and strength of the elastic part (412) can be adjusted by controlling the area of ​​the hollow hole (414).

12. The bone conduction vibration sound generating device as described in claim 1, characterized in that, The vibration assembly (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. The coil (3) surrounds the outer periphery of the magnetic plate (20). The magnets (21) and the magnetic plate (20) are arranged along the vibration direction of the vibration assembly (2); or, The vibration assembly (2) includes a magnetically conductive part (22) and two magnetic parts (23) located on both sides of the magnetically conductive part (22). The two magnetic parts (23) are arranged with the same pole facing each other. The coil (3) surrounds the outer periphery of the magnetically conductive part (22). The magnetic parts (23) and the magnetically conductive part (22) are arranged along the vibration direction of the vibration assembly (2); or, The vibration assembly (2) includes a magnet (21) and two magnetic plates (20) connected to both ends of the magnet (21). The magnet (21) is magnetized along the vibration direction of the vibration assembly (2), and at least one of the magnetic plates (20) is surrounded by a coil (3). The magnet (21) and the magnetic plates (20) are arranged along the vibration direction of the vibration assembly (2).

13. The bone conduction vibration sound generating device according to any one of claims 1 to 12, characterized in that, The housing (1) is provided with one or more bosses (13) for limiting the position of the coil (3) in the height direction.

14. The bone conduction vibration sound generating device as described in claim 13, characterized in that, The outer peripheral surface of the outer casing (1) is provided with a mounting hole (12) for mounting the coil (3), and the mounting hole (12) is a blind hole or a through hole; The outer peripheral surface includes two first side surfaces (15) and two second side surfaces (16) arranged opposite to each other, wherein the first side surface (15) extends along the length direction of the outer shell (1), and the second side surface (16) extends along the width direction of the outer shell (1), and the mounting hole (12) is formed on the first side surface (15) or the second side surface (16).

15. The bone conduction vibration sound generating device as described in claim 14, characterized in that, The opening of the mounting hole (12) gradually increases outward.

16. The bone conduction vibration sound generating device as described in claim 14, characterized in that, The boss (13) protrudes into the mounting hole (12).

17. The bone conduction vibration sound generating device as described in claim 13, characterized in that, The protrusions (13) all abut against the upper end face (30) of the coil (3); or, The bosses (13) all abut against the lower end face (31) of the coil (3); or, Of the plurality of protrusions (13), some protrusions (13) abut against the upper end of the coil (3), and some protrusions (13) abut against the lower end of the coil (3).

18. The bone conduction vibration sound generating device as described in claim 14, 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).

19. The bone conduction vibration sound generating device according to any one of claims 1 to 12, characterized in that, The aspect ratio of the bone conduction vibration sound generating device is 1.2 to 8.

20. The bone conduction vibration sound generating device as described in claim 19, characterized in that, The aspect ratio of the bone conduction vibration sound generating device is 3 to 5.

21. The bone conduction vibration sound generating device according to any one of claims 1 to 12, characterized in that, The outer shell (1) is made of plastic, aluminum or stainless steel; The elastic element (4) is made of stainless steel, plastic or beryllium copper.

22. A wearable device, characterized in that, Includes the bone conduction vibration sound generating device as described in any one of claims 1 to 21.

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