Bone conduction vibration sound device and bone conduction glasses

Abstract

The present invention discloses a bone conduction vibration sound-generating device and bone conduction glasses, the bone conduction vibration sound-generating device comprising: a shell assembly, a spring, a first magnet and a drive assembly. The shell assembly comprises an outer frame, a spacer connected to the end of the outer frame, and a receiving cavity formed between the outer frame and the spacer, the outer frame is made of a magnetic material, the spacer is made of a non-magnetic material or a material with weaker magnetic conductivity than the outer frame; the spring is connected to the spacer; the first magnet is arranged in the receiving cavity and connected to the spring; the drive assembly is arranged in the receiving cavity and connected to the outer frame, and the drive assembly is used to drive the first magnet to vibrate. When the bone conduction vibration sound-generating device of the present invention is working, the first magnet is not easily unable to vibrate due to excessive suction between it and the shell assembly, and the reliability is better.

Description

Technical Field

[0001] The present invention relates to the technical field of bone conduction sound generation, and in particular to a bone conduction vibration sound generation device and bone conduction glasses. Background Art

[0002] Bone conduction glasses are glasses that integrate bone conduction sound technology. They transmit sound through the principle of bone conduction and have the dual functions of glasses and headphones.

[0003] Bone conduction glasses include a bone conduction vibration sound-generating device, which can vibrate under the action of electromagnetic force. When the vibration is transmitted to the human face, the person can hear the sound.

[0004] There are roughly two ways to install bone conduction vibration sound-generating devices. One is that the bone conduction vibration sound-generating device is connected to the outside of the temple of the bone conduction glasses, which fits the face alone. This type of bone conduction glasses has a large difference in appearance from traditional glasses due to the addition of an additional bone conduction vibration sound-generating device, which increases the complexity of the temple structure and increases the risk of damage when falling or impacting; the other type of bone conduction vibration sound-generating device is set inside the temple of the bone conduction glasses. In this case, the appearance of the bone conduction glasses is less different from that of traditional glasses, and the reliability of the temples is higher. However, the current bone conduction vibration sound-generating devices are large in size and are usually cylindrical, which requires the temples to be significantly increased in thickness and width to provide installation space for the bone conduction vibration sound-generating device.

[0005] In addition, due to the limitation of installation space, the size of bone conduction vibration sound-generating devices tends to be made smaller. In bone conduction vibration sound-generating devices adopting a dynamic magnetic (magnet vibration) structure, the gap between the magnet and the outer shell made of magnetic conductive material is small. When vibrating, it is easy for the magnetic attraction between the magnet and the outer shell to be too large, resulting in failure to vibrate, which seriously affects the reliability of the product.

[0006] Therefore, it is necessary to improve the prior art to overcome the above defects. Summary of the Invention

[0007] The object of the present invention is to provide a bone conduction vibration sound-generating device and bone conduction glasses, wherein the bone conduction vibration sound-generating device has better reliability.

[0008] To achieve the above-mentioned object, the present invention provides a bone conduction vibration sound-generating device, comprising:

[0009] The housing assembly includes an outer frame, a spacer connected to an end of the outer frame, and a receiving cavity formed between the outer frame and the spacer, wherein the outer frame is made of a magnetic conductive material, and the spacer is made of a non-magnetic conductive material or a material with weaker magnetic conductivity than the outer frame;

[0010] a spring piece connected to the spacer;

[0011] A first magnet is disposed in the receiving cavity and connected to the spring; and

[0012] A driving component is disposed in the receiving cavity and connected to the outer frame, and the driving component is used to drive the first magnet to vibrate.

[0013] Furthermore, the number of the spacer is one, the spacer is annular and surrounds the outer periphery of the first magnet; or,

[0014] The spacer is plate-shaped, there are a plurality of spacers, and the plurality of spacers surrounds the outer periphery of the first magnet.

[0015] Furthermore, the driving component includes a second magnet and a coil surrounding the outer periphery of the second magnet. The second magnet and the first magnet are arranged with the same pole opposite to each other, and there is a space between them. The coil is used to generate a magnetic field that drives the first magnet to vibrate when energized.

[0016] Furthermore, the repulsive force between the first magnet and the second magnet is offset by the attractive force between the first magnet and the outer frame.

[0017] Furthermore, the outer frame includes a base plate and a side plate protruding from an outer edge of the base plate, the coil and the second magnet are both fixedly connected to the base plate, and the end of the second magnet close to the first magnet does not exceed the coil.

[0018] Furthermore, the outer frame is provided with a wiring groove for threading the coil, and the wiring groove extends from the end surface of the side plate to the base plate.

[0019] Furthermore, the side panel is provided with an observation port connecting the receiving cavity and the outside.

[0020] Furthermore, the bone conduction vibration sound-generating device is in a strip shape, and the aspect ratio of the bone conduction vibration sound-generating device is 1.2-8.

[0021] Furthermore, the spring piece includes an outer bracket connected to the spacer, a connecting plate connected to the first magnet, and an elastic arm connected between the outer bracket and the connecting plate; the bone conduction vibration sound-generating device also includes a low-frequency adjustment plate connected between the first magnet and the connecting plate, and the low-frequency adjustment plate does not contact the elastic arm.

[0022] On the other hand, the present invention provides a pair of bone conduction glasses comprising the bone conduction vibration sound-generating device as described in any one of the above items.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In the present invention, the shell assembly includes an outer frame and a spacer, wherein the outer frame is made of a magnetic material, and the spacer is made of a non-magnetic material or a material with weaker magnetic conductivity than the outer frame. In this way, the suction force between the first magnet and the shell assembly during the vibration process can be reduced, especially the suction force between the first magnet and the shell assembly when the first magnet vibrates to a position far away from the coil, thereby preventing the problem that the coil cannot drive the first magnet to vibrate due to excessive suction between the first magnet and the outer frame assembly, and the bone conduction vibration sound-generating device has better reliability.

[0025] 2. As an improvement, the bone conduction vibration sound-generating device is configured in a strip shape, which is adapted to the shape of the temples of the bone conduction glasses, so that it can be easily installed into the temples, and has less impact on the cross-sectional size of the temples, making the bone conduction glasses more comfortable to wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a bone conduction vibration sound-generating device according to one embodiment of the present invention.

[0027] Figure 2 yes Figure 1 An exploded view of the bone conduction vibration sound generating device is shown.

[0028] Figure 3 yes Figure 1 The schematic diagram of the structure of the shell component of the bone conduction vibration sound-generating device shown.

[0029] Figure 4 yes Figure 1 A top view of the bone conduction vibration sound-generating device shown.

[0030] Figure 5 It is along Figure 4 Sectional view obtained by cutting along the AA cutting line.

[0031] Figure 6 3 is a schematic structural diagram of a housing assembly according to an embodiment of the present invention, wherein the spacer has a notch.

[0032] Figure 7 This is a schematic structural diagram of a housing assembly according to an embodiment of the present invention. In the figure, there are multiple spacers.

[0033] Figure 8 yes Figure 3 Bottom view of the spacer of the middle housing assembly.

[0034] Figure 9 yes Figure 1 The schematic diagram of the structure of the outer frame of the bone conduction vibration sound-generating device shown.

[0035] Figure 10 yes Figure 1 This is a structural schematic diagram of the bone conduction vibration sound-generating device from another perspective in one embodiment of the present invention.

[0036] Figure 11 It is a structural schematic diagram of a spring piece connected to a low-frequency adjustment piece in one embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] As used herein, the terms "comprise," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0039] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] like Figures 1 to 11 As shown, the present invention proposes a bone conduction vibration sound-generating device, which includes a shell component 1, a spring 2 connected to the shell component 1, a first magnet 3 connected to the spring 2, and a driving component 4 fixed in the shell component 1.

[0041] like Figures 1 to 3As shown, the housing assembly 1 includes an outer frame 10 and a spacer 11 connected to the end of the outer frame 10, and a receiving cavity 12 with an open end is formed between the outer frame 10 and the spacer 11. The outer frame 10 is made of a magnetic material with good magnetic conductivity, and is preferably made of SPCC material. The spacer 11 is made of a non-magnetic material or a material with weaker magnetic conductivity than the outer frame 10. The non-magnetic material can be, for example, plastic such as PC or metal materials such as aluminum alloy. The material with weaker magnetic conductivity than the outer frame 10 can be, for example, stainless steel. Preferably, the outer frame 10 and the spacer 11 are both made of metal material, and the connection between the two is achieved by MIM metal powder injection molding process.

[0042] The spring piece 2 is connected to the spacer 11, which covers the open end of the receiving cavity 12. The spring piece 2 is connected to the first magnet 3 disposed in the receiving cavity 12, and is used to provide a restoring force to drive the first magnet 3 back to the equilibrium position after the first magnet 3 deviates from the equilibrium position.

[0043] refer to Figure 2 、 Figure 4 and Figure 5 The driving component 4 is disposed in the receiving cavity 12 and is fixedly connected to the outer frame 10 for driving the first magnet 3 to vibrate. Specifically, the driving component 4 includes a coil 41. When the coil 41 is energized, a changing magnetic field is generated, and the first magnet 3 vibrates under the action of the magnetic field force.

[0044] Since a spacer 11 is provided at the end of the outer frame 10, and the spacer 11 is made of a non-magnetic material or a material with weaker magnetic conductivity than the outer frame 10, the magnetic attraction between the first magnet 3 and the spacer 11 is 0 or is smaller than the magnetic attraction between the first magnet 3 and the outer frame 10. In the conventional structure, when the first magnet 3 vibrates to the lower end of the outer shell component 1 (i.e., the end of the outer shell component 1 away from the driving component 4), the distance between the coil 41 and the first magnet 3 becomes farther, so its driving force on the first magnet 3 is weakened, and it is easy for the first magnet 3 to be unable to rebound due to excessive attraction between the outer frame component 1. In the present application, by providing a spacer 11 at the open end of the outer frame 10, when the first magnet 3 vibrates to the lower end of the outer shell component 1, it is mainly closer to the spacer 11, which can reduce the attraction between the first magnet 3 and the outer frame component 1, preventing the occurrence of an inability to rebound, and making the use of the bone conduction vibration sound-generating device more reliable. Correspondingly, the gap between the outer periphery of the first magnet 3 and the outer shell assembly 1 can be smaller, thereby increasing the volume of the first magnet 3. The magnetism and mass of the first magnet 3 are greater, which is beneficial to increasing the volume of the bone conduction vibration sound-generating device and reducing its low-frequency resonance point F0 value.

[0045] In a preferred embodiment, the number of the spacer 11 is one, and the spacer 11 is in the shape of a ring surrounding the outer periphery of the first magnet 3. The spacer 11 can be in the shape of a closed ring (refer to Figure 3), or a ring with a gap 112 (refer to Figure 6 ).

[0046] In another preferred embodiment, reference Figure 7 , there are multiple spacers 11, Figure 7 In the illustrated embodiment, there are four plate-shaped spacers 11 . The spacers 11 are located outside the outer circumference of the first magnet 3 , and a plurality of spacers 11 surround the outer circumference of the first magnet 3 .

[0047] The spring piece 2 can be connected to the end surface 113 of the spacer 11, or to the inner side surface 110 or the outer side surface 111 of the spacer 11 (see the reference numerals). Figure 8 ), preferably, the outer frame 10 and the spring piece 2 are respectively connected to the upper and lower end surfaces 113 of the spacer 11, which facilitates the connection between the outer frame 10, the spacer 11 and the spring piece 2. The connection between the outer frame 10 and the spacer 11 and between the spring piece 2 and the spacer 11 is not limited, for example, by welding or gluing.

[0048] like Figure 5 As shown, the driving assembly 4 further includes a second magnet 40, which is disposed in a coil hole 410 of the coil 41, that is, the coil 41 surrounds the outer periphery of the second magnet 40. Figure 9 The outer frame 10 includes a base plate 100 and a side plate 101 connected to the outer edge of the base plate 100. The side plate 101 protrudes from the outer edge of the base plate 100. Preferably, it protrudes in a direction perpendicular to the base plate 100. The spacer 11 is connected to the end of the side plate 101. The receiving cavity 12 is located between the base plate 100, the side plate 101, the spacer 11 and the spring 2. The first magnet 40 and the coil 41 are both located in the receiving cavity 12 and fixedly connected to the base plate 100. The connection method is, for example, adhesive connection. After the installation is completed, refer to Figure 5 The first magnet 3 and the second magnet 40 are arranged with the same poles facing each other (for example, with the two north poles facing each other or the two south poles facing each other), and there is a space 30 between them to provide space for the first magnet 3 to vibrate. Preferably, the end of the second magnet 40 close to the first magnet 3 does not extend beyond the coil 41. In this way, the first magnet 3 can be blocked by the coil 41 in the event of an accident such as falling or being impacted, and the two magnets will not be damaged by the collision. At the same time, it is conducive to making the overall structure more compact.

[0049] In order to make the bone conduction vibration sound-generating device have higher sensitivity, the repulsive force between the first magnet 3 and the second magnet 40 is offset by the attractive force between the first magnet 3 and the outer frame 10, that is, the repulsive force between the first magnet 3 and the second magnet 40 is the same as the attractive force between the first magnet 3 and the outer frame 10 in magnitude and opposite in direction, so that the first magnet 3 is in a state of static equilibrium. In this way, after the coil 41 is energized to generate a magnetic field, the first magnet 3 can respond more quickly to changes in the magnetic field and have higher sensitivity. It is understandable that the shrapnel 2 is made of non-magnetic material or weakly magnetic material to eliminate or reduce the impact on static equilibrium.

[0050] As a preferred embodiment, the outer frame 10 is formed by sheet metal stamping and bending, that is, the four sides of the sheet metal are bent to be perpendicular to the middle sheet metal to form the side panels 101, and the middle sheet metal forms the base plate 100. After the processing is completed, refer to Figure 9 , gaps 105 are formed between adjacent side panels 101 of the outer frame 10. Sheet metal stamping facilitates processing. The outer frame 10 can also be directly molded in a single step using a metal injection mold (MIM process). This process eliminates the dimensional tolerance variation caused by bending, further improving the dimensional accuracy of the outer frame 10.

[0051] Further preferably, the spacer 11 is annular and connects the multiple side panels 101 , so that the overall strength and rigidity of the outer frame 10 are better and the side panels 101 are not easily deformed.

[0052] In order to facilitate the wiring of the coil 41, the outer frame 10 is provided with a wiring groove 102 for the coil 41 to pass through. Figure 9 The wiring groove 102 extends from the end surface 103 of the side plate 101 to the base plate 100. Preferably, refer to Figure 4 The wiring groove 102 extends to above the coil hole 410. There are two wiring grooves 102, which are symmetrically arranged on both sides of the outer frame 10.

[0053] An observation port 104 connecting the accommodating cavity 12 and the outside world is also provided on the side panel 101. The interior of the outer frame 10 can be observed through the observation port 104. During the installation of the first magnet 3, the coil 41 and the second magnet 40 in the outer frame 10, the observation port 104 can facilitate the operator to observe the position of each part and facilitate the positioning of the position of each part, making assembly more convenient (obviously, the wiring groove 102 also has such a function). At the same time, during the test, it is also convenient to observe the vibration state of the first magnet 3.

[0054] The bone conduction vibration sound-generating device is configured in a strip shape so that it is more convenient to integrate it into the temple of the bone conduction glasses without increasing the cross-sectional area of ​​the temple too much, making the bone conduction glasses more comfortable to wear. As 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, the aspect ratio is any value between 3 and 5. Too small an aspect ratio will waste space. Usually, the width dimension is very limited. Too large an aspect ratio is likely to cause rolling vibration, which in turn affects the performance. Setting the aspect ratio to 3 to 5 is conducive to improving the performance of the bone conduction vibration sound-generating device while making full use of the space. More preferably, the aspect ratio of the bone conduction vibration sound-generating device is 4. Obviously, since the aspect ratio of the bone conduction vibration unit is large, and the width and thickness are small, the temples can be made thinner, making it more comfortable, lightweight and beautiful to wear.

[0055] Since the bone conduction vibration sound device is in the shape of a rectangular strip, Figure 9 As shown, the side panels 101 can be divided into a relatively large long side panel 101a and a relatively small short side panel 101b. Preferably, the wiring trough 102 is provided on the short side panel 101b, and the observation port 104 is provided on the long side panel 101a. Since the long side panel 101a has a larger area, a larger observation port 104 can be provided, resulting in a better observation effect.

[0056] As a preferred embodiment, Figure 10 As shown, the spring piece 2 includes an outer bracket 20 connected to the spacer 11, a connecting plate 21 connected to the first magnet 3, and an elastic arm 22 connected between the outer bracket 20 and the connecting plate 21. The outer bracket 20 is annular and is connected to the spacer 11 by, for example, gluing or welding. The connecting plate 21 is strip-shaped and is connected to the first magnet 3 in a strip shape. There are two elastic arms 22, which are symmetrically arranged on both sides of the connecting plate 21. The elastic arm 22 is strip-shaped as a whole and is arranged parallel to the connecting plate 21. Its two ends are connected to the two ends of the connecting plate 21, and the middle part is connected to the outer bracket 20. During the vibration of the first magnet 3, the connecting plate 21 moves with the movement of the first magnet 3, and the elastic arm 22 undergoes elastic deformation to provide a reset force to drive the first magnet 3 back to its original position. Since the first magnet 3 is in the shape of an elongated strip with a relatively large length-to-width ratio, the use of a traditional spring structure easily causes the first magnet 3 to roll during vibration (referring to the phenomenon that the first magnet 3 swings left and right during vibration). The spring structure in this application is beneficial to improving the stability of the vibration of the first magnet 3 and preventing the problem of rolling.

[0057] As a preferred embodiment, Figure 2 、 Figure 5 and Figure 11As shown, a low-frequency adjustment plate 5 is connected between the first magnet 3 and the connecting plate 21, and the low-frequency adjustment plate 5 does not contact the elastic arm 22. Preferably, the low-frequency adjustment plate 5 overlaps with the connecting plate 21, so as to increase the connection strength between the low-frequency adjustment plate 5, the connecting plate 21 and the first magnet 3 while preventing the low-frequency adjustment plate 5 from contacting the elastic arm 22. Due to the provision of the low-frequency adjustment plate 5, the width and length of the first magnet 3 can be made larger, and even if it exceeds above the elastic arm 22, it will not affect the deformation and vibration of the elastic arm 22. The amplitude of the first magnet 3 at low frequency is larger, and the low-frequency sound effect is better. In addition, the space of the accommodating cavity 12 can be more fully utilized, the volume and magnetic force of the first magnet 3 can be increased, thereby increasing the sensitivity and strength of the bone conduction vibration sound-generating device.

[0058] The present invention also provides bone conduction glasses comprising temples and the bone conduction vibration sound-generating device described above. 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, it effectively reduces the cross-sectional area of ​​the temples, making the bone conduction glasses more comfortable to wear.

[0059] The above is only a specific embodiment of the present invention, and any other improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. A bone conduction vibration sound-generating device, characterized in that: include: A housing assembly (1) comprising an outer frame (10), a spacer (11) connected to an end of the outer frame (10), and a receiving cavity (12) formed between the outer frame (10) and the spacer (11), wherein the outer frame (10) is made of a magnetic conductive material, the spacer (11) is made of a non-magnetic conductive material or a material with a magnetic conductive property weaker than that of the outer frame (10), the outer frame (10) comprises a base plate (100) and a side plate (101) protruding from an outer edge of the base plate (100), and the spacer (11) is connected to an end of the side plate (101); A spring piece (2) connected to the spacer (11); A first magnet (3) is disposed in the receiving cavity (12) and connected to the spring (2), and the side plate (101) and the spacer (11) are both located outside the outer peripheral surface of the first magnet (3); and A driving component (4) is disposed in the receiving cavity (12) and connected to the outer frame (10); the driving component (4) is used to drive the first magnet (3) to vibrate.

2. The bone conduction vibration sound-generating device according to claim 1, wherein: The number of the spacer (11) is one, and the spacer (11) is annular and surrounds the outer periphery of the first magnet (3); or, The spacer (11) is plate-shaped, there are multiple spacers (11), and the multiple spacers (11) surround the outer periphery of the first magnet (3).

3. The bone conduction vibration sound-generating device according to claim 1, wherein: The driving component (4) includes a second magnet (40) and a coil (41) surrounding the outer periphery of the second magnet (40). The second magnet (40) and the first magnet (3) are arranged opposite to each other with the same pole, and there is a space (30) between the two. The coil (41) is used to generate a magnetic field that drives the first magnet (3) to vibrate when energized.

4. The bone conduction vibration sound-generating device according to claim 3, wherein: The repulsive force between the first magnet (3) and the second magnet (40) is offset by the attractive force between the first magnet (3) and the outer frame (10).

5. The bone conduction vibration sound-generating device according to claim 3, wherein: The coil (41) and the second magnet (40) are both fixedly connected to the substrate (100), and the end of the second magnet (40) close to the first magnet (3) does not extend beyond the coil (41).

6. The bone conduction vibration sound-generating device according to claim 5, characterized in that: The outer frame (10) is provided with a wiring groove (102) for threading the coil (41), and the wiring groove (102) extends from the end surface (103) of the side plate (101) to the base plate (100).

7. The bone conduction vibration sound-generating device according to claim 5, characterized in that: The side plate (101) is provided with an observation port (104) communicating with the receiving cavity (12) and the outside world.

8. The bone conduction vibration sound-generating device according to any one of claims 1 to 7, wherein: The bone conduction vibration sound-generating device is strip-shaped, and the aspect ratio of the bone conduction vibration sound-generating device is 1.2~8.

9. The bone conduction vibration sound-generating device according to any one of claims 1 to 7, characterized in that: The spring piece (2) comprises an outer bracket (20) connected to the spacer (11), a connecting plate (21) connected to the first magnet (3), and an elastic arm (22) connected between the outer bracket (20) and the connecting plate (21); the bone conduction vibration sound-generating device further comprises a low-frequency adjustment piece (5) connected between the first magnet (3) and the connecting plate (21), and the low-frequency adjustment piece (5) does not contact the elastic arm (22).

10. A bone conduction glasses, characterized in that: It includes the bone conduction vibration sound-generating device as described in any one of claims 1 to 9.

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