Bone conduction sounding device and bone conduction earphone
By introducing anti-collision parts and synthetic brackets into the bone conduction sounding device, the problem of vibration components hitting the coil is solved, and the reliability and assembly accuracy of the device are improved.
Patent Information
- Application Number
- CN202420035726.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-05
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-01-05
AI Technical Summary
When existing bone conduction sounding devices are abnormal in operation or lateral impact, the vibrating assembly may impact the coil, causing the coil to be damaged and affecting the reliability of the device. At the same time, the bracket and support ring are separate parts and require glue assembly, with low accuracy.
A bone conduction sounding device is designed, and a second gap is formed between the anti-collision member and the vibration assembly, and is connected to the bracket through the anti-collision member to prevent the vibration assembly from hitting the coil. At the same time, the bracket and the coil connection plate are integrated to reduce the number of parts and improve assembly accuracy.
Through the design of the anti-collision parts, the vibration components can effectively prevent impacting the coil when they move sideways, protect the quality of the coil and improve the reliability of the bone conduction sounding device. At the same time, the assembly process is simplified and the accuracy is improved.
Smart Images
Figure CN222515347U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bone conduction sound generation, in particular to a bone conduction sound generation device and a bone conduction earphone. Background Art
[0002] Bone conduction sound devices can convert electrical signals into mechanical vibration signals, and transmit the mechanical vibration signals to the human auditory nerve through human tissues and bones, so that the wearer can hear the sound. Bone conduction sound devices can be divided into dynamic coil type, moving iron type and moving magnet type according to the different vibration components.
[0003] Bone conduction sound generating devices of the prior art, such as Figure 1 As shown, it includes a bracket 1, a vibration component 2, a first spring 3, a coil 4, a protective cover 6, a second spring 8 and a support ring 9. The vibration component 2 includes magnets 201 stacked along the vibration direction of the bone conduction sound-generating device and a magnetic conductive plate 202 between the magnets 201. The coil 4 is wound around an axis parallel to the vibration direction and sleeved on the outside of the vibration component 2. The first spring 3 and the second spring 8 are respectively connected to the magnet 201 through a gasket 7. The coil 4 is a non-moving part of the bone conduction sound-generating device. When the bone conduction sound-generating device works abnormally or is subjected to a lateral impact, the vibration component 2 will deviate from the vibration axis and move laterally. At this time, the vibration component 2 will hit the coil 4, causing damage to the coil 4, which is not conducive to the reliable operation of the bone conduction sound-generating device. At the same time, the bracket 1 and the support ring 9 are two separate parts, which need to be glued and assembled, and the precision is not high.
[0004] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content
[0005] The utility model aims to provide a bone conduction sound generating device and a bone conduction earphone, which can prevent the coil from being hit and ensure the quality of the coil.
[0006] To achieve the above-mentioned utility model object, the utility model proposes a bone conduction sound generating device, a bracket, comprising an inner cavity and a coil connecting plate protruding into the inner cavity;
[0007] A vibration component, disposed in the inner cavity;
[0008] A first spring piece, connected between the bracket and the vibration component;
[0009] a coil connected to the coil connecting plate and surrounding the outside of the vibration component to form a first gap with the outer peripheral surface of the vibration component, wherein the coil is used to drive the vibration component to vibrate; and
[0010] An anti-collision member is fixed relative to the bracket, and the anti-collision member is spaced relative to the outer peripheral surface of the vibration component, a second gap is formed between the anti-collision member and the vibration component, and the width of the first gap is greater than the width of the second gap.
[0011] Furthermore, the anti-collision member is annular and surrounds the outside of the vibration component, the minimum width of the second gap is 0.05-0.5 mm, and the absolute value of the difference between the minimum width of the second gap and the first gap is 0.04-0.4 mm.
[0012] Furthermore, the anti-collision member and the coil connection plate are respectively connected to the two end surfaces of the coil in the axial direction, the anti-collision member is also provided with an escape groove for evading the lead wire of the coil, and the bracket is provided with a wiring hole arranged opposite to the escape groove.
[0013] Furthermore, the anti-collision component is connected to the bracket and / or the coil.
[0014] Furthermore, the coil connecting plate and the outer peripheral surface of the vibration component are arranged relative to each other with a spacing therebetween, and a third gap is formed therebetween, and a width of the third gap is smaller than a width of the first gap;
[0015] The coil connecting plate is ring-shaped and surrounds the outside of the vibration component.
[0016] Furthermore, the bracket and the coil connecting plate are an integral structure or a separate structure, and are made of plastic or non-magnetic metal material.
[0017] Furthermore, the bone conduction sound generating device further comprises a protective cover, which is arranged at the open end of the bracket, and at least a part of the protective cover is arranged relative to and spaced from the vibration component;
[0018] The first elastic sheet includes an outer bracket fixed relative to the bracket, an inner bracket arranged in the outer bracket, and an elastic arm connected between the outer bracket and the inner bracket, and the protective cover includes a stopper arranged relative to the inner bracket of the first elastic sheet and spaced apart.
[0019] Furthermore, the minimum distance between the stopper and the inner bracket is between 0.1 mm and 1 mm.
[0020] Furthermore, there are two elastic arms on the first spring sheet, the two elastic arms are symmetrically arranged with respect to the center, and are respectively located at two ends of the inner bracket; and the projection of the elastic arms along the vibration direction of the vibration component does not cover the vibration component.
[0021] Furthermore, it also includes a second spring piece connected between the vibration component and the bracket, and the first spring piece and the second spring piece are respectively connected to the two ends of the vibration component; the bracket is tubular, and the first spring piece and the second spring piece are respectively arranged at the two open ends of the bracket.
[0022] Further, the vibration assembly includes at least two magnets and a magnetic conductive plate connected between two adjacent magnets, the two adjacent magnets are arranged with the same poles facing each other, and the coil surrounds the outer periphery of the magnetic conductive plate; or,
[0023] The vibration component includes at least two magnetic conductive plates and a magnet connected between two adjacent magnetic conductive plates. The magnet is magnetized along the vibration direction of the vibration component. The coil is surrounded by the outside of at least one of the magnetic conductive plates.
[0024] On the other hand, the present application proposes a bone conduction earphone, comprising the bone conduction sound generating device as described above.
[0025] Compared with the prior art, the utility model has the following beneficial effects: the bone conduction sound generating device provided by the utility model is provided with an anti-collision piece, and the second gap between the anti-collision piece and the vibration component is smaller than the first gap between the coil and the vibration component. The anti-collision piece can prevent the bone conduction sound generating device from colliding with the coil when it is working abnormally or subjected to a lateral impact, thereby ensuring the quality of the coil and improving the reliability of the operation of the bone conduction sound generating device. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the structure of a bone conduction sound generating device in the prior art;
[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of the bone conduction sound generating device in the utility model;
[0028] Figure 3 This is a cross-sectional view of the bone conduction sound generating device in the utility model;
[0029] Figure 4 yes Figure 3 A partial enlarged view of the middle A;
[0030] Figure 5 This is another cross-sectional view of the bone conduction sound generating device in the utility model;
[0031] Figure 6 It is a structural schematic diagram of the anti-collision component of the bone conduction sound generating device in the utility model;
[0032] Figure 7 It is a schematic diagram of the structure of the support of the bone conduction sound generating device in the utility model;
[0033] Figure 8This is the frequency response diagram of the bone conduction sound device with different weight coils under the same conditions;
[0034] Fig. 9 The utility model is a schematic diagram of the structure of the first spring piece of the bone conduction sound generating device. DETAILED DESCRIPTION
[0035] In order to make the above-mentioned purposes, 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 is to 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 structures related to the present application are shown in the accompanying drawings, rather than all structures. 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.
[0036] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.
[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0038] like Figures 2 to 5 As shown, the present application proposes a bone conduction sound generating device 100, comprising a bracket 1, a vibration component 2, a first spring piece 3, a coil 4 and an anti-collision component 5.
[0039] The support 1 includes an inner cavity 101 and a coil connecting plate 102 protruding into the inner cavity 101 .
[0040] The vibration component 2 is disposed in the inner cavity 101 .
[0041] The first elastic piece 3 is connected between the bracket 1 and the vibration component 2 .
[0042] The coil 4 is connected to the coil connecting plate 102 and surrounds the outside of the vibration component 2 to form a first gap 103 between the coil 4 and the outer peripheral surface of the vibration component 2. The coil 4 is used to drive the vibration component 2 to vibrate.
[0043] The anti-collision member 5 is relatively fixed to the bracket 1 , and the anti-collision member 5 and the outer peripheral surface of the vibration component 2 are relatively spaced apart, and a second gap 104 is formed between the anti-collision member 5 and the vibration component 2 . The width of the first gap 103 is greater than that of the second gap 104 .
[0044] Since the second gap 104 between the anti-collision member 5 and the vibration component 2 is smaller than the first gap 103 between the coil 4 and the vibration component 2, the anti-collision member 5 can prevent the vibration component 2 from hitting the coil 4 when the vibration component 2 vibrates, thereby ensuring the quality of the coil 4. For example, when the vibration component 2 moves sideways perpendicular to the vibration direction B, the vibration component 2 will first contact the anti-collision member 5 and be blocked by the anti-collision member 5, and the coil 4 will not be damaged due to hitting the coil 4.
[0045] As a preferred embodiment, Figure 3 , Figure 5 and Figure 6 As shown, the anti-collision member 5 is annular and surrounds the outside of the vibration component 2. The second gap 104 is an annular gap. Optionally, the minimum width W2 of the second gap 104 (i.e., the width at the narrowest point) is 0.05-0.5mm, preferably 0.08-0.4mm, and more preferably 0.12-0.25mm; the absolute value of the difference between the minimum width W2 of the second gap 104 and the minimum width W1 of the first gap 103 is 0.04-0.4mm, preferably 0.05-0.3mm, and more preferably 0.1-0.2mm, so that the coil 4 can efficiently drive the vibration component 2 to vibrate, and it is not easy to hit the anti-collision member 5 during normal operation. Optionally, the annular second gap 104 is of equal width. In other embodiments, the anti-collision member 5 can be block-shaped, and the number can be multiple. Multiple block-shaped anti-collision members 5 are located outside the vibration component 2, and a multi-directional anti-collision effect is achieved by multi-point limiting.
[0046] The anti-collision member 5 can be connected to the bracket 1 alone, or connected to the coil 4 alone, or connected to the bracket 1 and the coil 4 at the same time, and the connection method can be, for example, adhesive or welding. Figures 3 to 5 As shown, the anti-collision member 5 and the coil connection plate 102 are respectively connected to the two end surfaces of the coil 4 in the axial direction, for example, they can be connected together by using adhesive connection. Figure 6 As shown, the anti-collision member 5 is also provided with an escape groove 501 for escaping the lead wire 401 of the coil 4. The escape groove 501 can prevent the lead wire 401 of the coil 4 from being pressed. Figures 3 to 5 and Figure 7 As shown, the bracket 1 is provided with a wiring hole 105 arranged opposite to the avoidance groove 501 to facilitate the installation of the lead wire 401 of the coil 4.
[0047] like Figure 5As shown, the coil connecting plate 102 and the outer peripheral surface of the vibration component 2 are arranged relatively spaced apart, and a third gap 106 is formed therebetween. The width W3 of the third gap 106 is smaller than the width W1 of the first gap 103, so that the coil connecting plate 102 and the anti-collision member 5 can be radially convex at the upper and lower ends of the coil 4, which can further prevent the vibration component 2 from hitting the coil 4.
[0048] Specific: such as Figure 7 As shown, the coil connection plate 102 is annular and surrounds the outside of the vibration component 2, and the third gap 103 is annular. The width of the third gap 103 can be the same as the width of the second gap 104 or slightly smaller than the width of the second gap 104. In some embodiments, the bracket 1 and the coil connection plate 102 are an integrated structure, which is simpler and more precise than the separate design of the coil connection plate 102 and the bracket 1; in other embodiments, the bracket 1 and the coil connection plate 102 can also be separate structures, and the coil connection plate 102 is fixedly connected to the inner surface of the bracket 1. Optionally, the bracket 1 and the coil connecting plate 102 are both made of plastic, such as PC, ABS, PA, PC+ABS, etc., which is lighter than a bracket made of magnetic material, and can reduce the overall weight of the bone conduction sound-generating device 100, and can reduce the mass of the stator of the bone conduction sound-generating device 100. The stator refers to the relatively fixed part of the bone conduction sound-generating device 100 when it is working (including the coil 4, bracket 1, anti-collision member 5, coil connecting plate 102 and other components). The vibration component 2 vibrates relative to the stator to improve the high-frequency response. Figure 8 As shown, Figure 8 The frequency response curves of two bone conduction sound generating devices with stators of different masses are shown, wherein the stator mass of the bone conduction sound generating device corresponding to the solid line is 0.5g, and the stator mass corresponding to the dotted line is 1g. It can be seen from the figure that when the weight of the stator is lighter, the high frequency response is higher. In other embodiments, the bracket 1 and the coil connecting plate 102 can also be made of non-magnetic metal materials.
[0049] like Figures 2 to 5 As shown, the bone conduction sound generating device further includes a protective cover 6 , which is disposed at the open end of the bracket 1 , and at least a portion of the protective cover 6 is disposed opposite to the vibration component 2 and spaced apart from each other.
[0050] like Fig. 9As shown, the first spring piece 3 includes an outer bracket 301 relatively fixed to the bracket 1, an inner bracket 302 arranged in the outer bracket 301, and an elastic arm 303 connected between the outer bracket 301 and the inner bracket 302, and the protective cover 6 includes a stopper 601 relatively spaced from the inner bracket 302 of the first spring piece 3 along the vibration direction B. Optionally, the minimum distance H between the stopper 601 and the inner bracket 302 is between 0.1mm-1mm, preferably 0.2mm-0.7mm, and more preferably 0.3mm-0.5mm, and the stopper 601 can limit the maximum deformation of the first spring piece 3, thereby preventing the first spring piece 3 from plastic deformation due to excessive displacement.
[0051] Among them, the number of elastic arms 303 on the first spring piece 3 is two, and the two elastic arms 303 are symmetrically arranged and are respectively located at the two ends of the inner bracket 302; the projection of the elastic arm 303 along the vibration direction B of the vibration component 2 does not cover the vibration component 2. It can be understood that there is no overlapping part between the two elastic arms 303 and the projection of the vibration component 2 in the vibration direction B, and the elastic arm 303 is not within the movement area of the vibration component 2. When the bone conduction sound generating device is hit by external force (such as falling), the vibration component 2 can be prevented from hitting the elastic arm 303, thereby preventing the elastic arm 303 from deforming.
[0052] like Figure 3 and Figure 5 As shown, the outer support 301 is connected to the support 1. In some embodiments, as shown in FIG. Figure 5 As shown, the inner bracket 302 is directly connected to the vibration component 2, which can save space in the vibration direction; in other embodiments, such as Figure 3 As shown, the inner bracket 302 is connected to the vibration component 2 via a gasket 7 .
[0053] like Fig. 9 As shown, at least two first positioning holes 304 are formed on the inner bracket 302. Figure 3 and Figure 5 As shown, the protective cover 6 is provided with a second positioning hole 602 corresponding to the first positioning hole 304. It can be understood that the protective cover 6 is provided with holes of corresponding number and shape for positioning the protective cover 6 and the spring piece; Figure 3 As shown, a third positioning hole 701 corresponding to the first positioning hole 304 may also be provided on the gasket 7. It is understandable that holes of corresponding number and shape provided on the gasket 7 may be used for positioning the spring and the vibration component 2 to reduce assembly errors.
[0054] like Figure 3 and Figure 5As shown, the bone conduction sound generating device further includes a second spring piece 8 connected between the vibration component 2 and the bracket 1, and the first spring piece 3 and the second spring piece 8 are respectively connected to the two ends of the vibration component 2, wherein the outer bracket 301 of the first spring piece 3 and the second spring piece 8 are both connected to the bracket 1, for example, they can be connected by adhesive. The bracket 1 is tubular, and the first spring piece 2 and the second spring piece 8 are respectively arranged at the two open ends of the bracket 1. Since the first spring piece 3 and the second spring piece 8 are respectively arranged at the two ends of the vibration component 2, the degree of freedom of the vibration component 2 is reduced, and the vibration of the vibration component 2 is more linear. Fixing the vibration component 2 in a bilateral fixing manner can greatly reduce the problems such as the excitation of high-order modes due to uneven force. When the vibration component 2 vibrates, the forces at both ends are more balanced, so that the vibration of the vibration component 2 is more stable, and it can reliably vibrate linearly along the axial direction without rolling vibration, and the stability is better and the restoring force is greater.
[0055] The vibration assembly 2 includes at least two magnets 201 and a magnetic conductive plate 202 connected between two adjacent magnets 201. The two adjacent magnets 201 are arranged opposite to each other with the same poles and are magnetized along the vibration direction B. The coil 4 surrounds the outer periphery of the magnetic conductive plate 202. Figure 3 and Figure 5 As shown, in the illustrated embodiment, the vibration component 2 includes two magnets 201 and a magnetic conductive plate 202, a coil 4 is wound around the outer circumference of the magnetic conductive plate 202, one end of the coil 4 is connected to the coil connecting plate 102, and the other end is connected to the anti-collision member 5, the coil connecting plate 102 and the anti-collision member 5 are arranged in corresponding positions, and the coil connecting plate 102 and the anti-collision member 5 can prevent the vibration component 2 from colliding with the coil 4, thereby ensuring the quality of the coil 4.
[0056] The present application also proposes a bone conduction earphone, comprising the bone conduction sound generating device 100 as described above.
[0057] The above are only specific implementations of the present invention, and any 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 sound device, characterized in that: include A bracket, comprising an inner cavity and a coil connecting plate protruding into the inner cavity; A vibration component, disposed in the inner cavity; A first spring piece, connected between the bracket and the vibration component; a coil connected to the coil connecting plate and surrounding the outside of the vibration component to form a first gap with the outer peripheral surface of the vibration component, wherein the coil is used to drive the vibration component to vibrate; as well as, An anti-collision member is fixed relative to the bracket, and the anti-collision member is spaced relative to the outer peripheral surface of the vibration component, a second gap is formed between the anti-collision member and the vibration component, and the width of the first gap is greater than the width of the second gap.
2. The bone conduction sound generating device according to claim 1, characterized in that: The anti-collision component is annular and surrounds the outside of the vibration component. The minimum width of the second gap is 0.05-0.5 mm, and the absolute value of the difference between the minimum widths of the second gap and the first gap is 0.03-0.4 mm.
3. The bone conduction sound generating device according to claim 1, characterized in that: The anti-collision member and the coil connection plate are respectively connected to the two end surfaces of the coil in the axial direction. The anti-collision member is also provided with an escape groove for evading the lead wire of the coil. The bracket is provided with a wiring hole arranged opposite to the escape groove.
4. The bone conduction sound generating device according to claim 1, characterized in that: The anti-collision component is connected to the bracket and / or the coil.
5. The bone conduction sound generating device according to claim 1, characterized in that: The coil connecting plate and the outer peripheral surface of the vibration component are arranged relative to each other with a spacing therebetween, and a third gap is formed therebetween, and the width of the third gap is smaller than the width of the first gap; The coil connecting plate is ring-shaped and surrounds the outside of the vibration component.
6. The bone conduction sound generating device according to claim 1, characterized in that: The bracket and the coil connecting plate are an integral structure or a separate structure, and are made of plastic or non-magnetic metal material.
7. The bone conduction sound generating device according to claim 1, characterized in that: The bone conduction sound generating device further comprises a protective cover, which is arranged at the open end of the bracket, and at least a part of the protective cover is arranged relative to the vibration component and spaced apart; The first elastic sheet includes an outer bracket fixed relative to the bracket, an inner bracket arranged in the outer bracket, and an elastic arm connected between the outer bracket and the inner bracket, and the protective cover includes a stopper arranged relative to the inner bracket of the first elastic sheet and spaced apart.
8. The bone conduction sound generating device according to claim 7, characterized in that: The minimum distance between the stopper and the inner bracket is between 0.1 mm and 1 mm.
9. The bone conduction sound generating device according to claim 7, characterized in that: There are two elastic arms on the first spring sheet, the two elastic arms are symmetrically arranged at the center and are respectively located at two ends of the inner bracket; the projection of the elastic arms along the vibration direction of the vibration component does not cover the vibration component.
10. The bone conduction sound generating device according to claim 7, characterized in that: It also includes a second spring piece connected between the vibration component and the bracket, and the first spring piece and the second spring piece are respectively connected to the two ends of the vibration component; the bracket is tubular, and the first spring piece and the second spring piece are respectively arranged at the two open ends of the bracket.
11. The bone conduction sound generating device according to any one of claims 1 to 10, characterized in that: The vibration component includes at least two magnets and a magnetic conductive plate connected between two adjacent magnets. The two adjacent magnets are arranged with the same poles facing each other, and the coil surrounds the outer periphery of the magnetic conductive plate.
12. A bone conduction earphone, comprising the bone conduction sound generating device according to any one of claims 1 to 11.