Elastic sheet improved bone conduction earphone vibrator

Abstract

The utility model relates to the technical field of bone conduction earphones, and discloses an elastic sheet improved bone conduction earphone vibrator, which comprises an inner shell, an elastic sheet and a vibration assembly, the loudspeaker further comprises a support and a coil unit arranged on the support, the elastic piece is fixedly installed in the inner shell, the middle of the elastic piece is provided with an elastic inner ring frame body, the support is provided with a first positioning column, the inner ring frame body is provided with a first through hole used for containing the first positioning column, and the vibration assembly is fixedly connected with the elastic piece through the support. The vibration assembly is at least partially located in a magnetic field generated by the coil unit. The vibration assembly and the support are fixedly connected through the cooperation of the first positioning column and the first through hole, the elastic piece adopts a design that a plurality of elastic arms are symmetrical, the vibration of the vibrator can cover a wide frequency range through the structural design, the sensitivity of the elastic piece is improved, the improved elastic piece has good high-frequency ductility, and the service life of the elastic piece is prolonged. Therefore, the vibrator can provide more vivid and layered audio frequency.

Description

Technical Field

[0001] The utility model relates to the technical field of bone conduction earphones, and in particular discloses a shrapnel-improved bone conduction earphone vibrator. Background Art

[0002] When bone conduction headphones are working, the vibrator unit converts sound into mechanical vibrations of different frequencies. When it contacts the human skull, it can transmit the sound to the auditory center through the skull so that people can hear the sound. The vibrator is usually suspended in the headphone shell by a shrapnel. The shrapnel can drive the vibrator to reset through its own elasticity, so that the vibrator can reciprocate under the drive of the magnetic field. Therefore, the performance of the shrapnel directly affects the vibration frequency of the vibrator and thus affects the sound quality of the bone conduction headphones. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a shrapnel-improved bone conduction earphone vibrator.

[0004] To achieve the above-mentioned purpose, the utility model provides a shrapnel-improved bone conduction earphone vibrator, comprising an inner shell, a shrapnel and a vibration component; it also comprises a bracket and a coil unit arranged on the bracket, the shrapnel is fixedly mounted on the inner shell, an elastic inner ring frame is provided in the middle of the shrapnel, a first positioning column is provided on the bracket, and the inner ring frame is provided with a first through hole for accommodating the first positioning column, the vibration component is fixedly connected to the shrapnel via the bracket, and the vibration component is at least partially located in the magnetic field generated by the coil unit.

[0005] Furthermore, the bracket is provided with a first positioning column, and the inner ring frame is provided with a first through hole for accommodating the first positioning column.

[0006] Furthermore, at least two first positioning columns are provided, and the two first positioning columns respectively fix the two ends of the bracket on the inner ring frame of the spring sheet, and the two first positioning columns are symmetrically arranged along the symmetry axis of the spring sheet.

[0007] Furthermore, the spring piece also includes an outer ring frame arranged around the inner ring frame, and an elastic arm connected between the inner ring frame and the outer ring frame.

[0008] Furthermore, the elastic arm has a bending portion and a connecting portion, the connecting portion is arranged in an arc shape, and two ends of the bending portion are connected to the inner ring frame and the outer ring frame via the connecting portion.

[0009] Furthermore, the connecting portion includes a first connecting arm a and a second connecting arm b, the first connecting arm a is connected between the outer extension portion and the bending portion, the bending portion is connected between the first connecting arm a and the second connecting arm b, and the second connecting arm b is connected between the bending portion and the inner extension portion.

[0010] Furthermore, there are multiple elastic arms, and two adjacent elastic arms are symmetrically arranged along the symmetry axis of the spring piece.

[0011] Furthermore, the vibration component also includes a magnetic bowl, a magnetic part and a magnetic conductive sheet; the coil unit has an electrode sheet, the magnetic bowl is installed at the bottom of the inner shell and supports the magnetic part, the coil unit is electrically connected to an external power supply via the electrode sheet, and the magnetic part is located in the magnetic field generated by the coil unit.

[0012] Furthermore, an electrode hole penetrating the inner ring frame is provided in the middle of the inner ring frame, one end of the electrode sheet is electrically connected to the external power supply via the electrode hole, and the other end of the electrode sheet is connected to the coil unit.

[0013] Furthermore, the shrapnel-improved bone conduction earphone vibrator also includes an outer shell, which is covered on the inner shell, and the first positioning column and the electrode sheet are arranged through the outer shell, and the inner shell is suspended in the cavity formed by the outer shell via the inner ring frame of the shrapnel.

[0014] Beneficial effects of the utility model: After adopting the above scheme, the utility model has the following advantages:

[0015] (1) The elastic arm of the spring is formed by utilizing the bending portion and two arc-shaped connecting arms. A plurality of elastic arms are provided, and two adjacent elastic arms are symmetrically arranged along the center line of the spring. The structural design is simple and reasonable, which reduces the structural stress at a specific point, makes the spring have better fatigue deformation resistance, ensures the balance of the vibrator vibration, optimizes the material cost, and improves the assembly efficiency of the bone conduction earphone vibrator.

[0016] (2) By providing an environmentally friendly galvanized layer on the surface of the shrapnel, the corrosion resistance of the shrapnel is improved, effectively preventing the shrapnel from being corroded due to factors such as humid environment or outdoor sports, which affects the sound quality of the bone conduction headphones. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the explosion state structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the vibrator of the utility model after removing the outer shell;

[0019] Figure 3 It is a schematic diagram of the structure of the spring piece in the utility model;

[0020] Figure 4 It is a cross-sectional view of the utility model;

[0021] Figure 5 It is a schematic diagram of the combined state structure of the utility model;

[0022] Figure 6It is a schematic diagram of the zinc coating position structure of the utility model.

[0023] Reference numerals include:

[0024] 1—Inner shell 2—Spring 3—Vibration component

[0025] 4—Bracket 5—Outer shell 11—Installation cavity

[0026] 12—Second positioning column 20—Galvanized layer 21—Inner ring frame

[0027] 22—elastic arm 23—outer ring frame 24—electrode hole

[0028] 211 - extension part 212 - first through hole 220 - bending part

[0029] 221—connecting portion 221a—first connecting arm 221b—second connecting arm

[0030] 231—inner extension 232—second positioning hole 31—magnetic bowl

[0031] 32 - magnetic part 33 - coil unit 34 - magnetic conductive sheet

[0032] 35—electrode sheet 41—first positioning column DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0034] See also Figures 1 to 6 As shown, the utility model is a shrapnel improved bone conduction earphone vibrator, comprising an inner shell 1, a shrapnel 2 and a vibration component 3; it also comprises a bracket 4 and a coil unit 33 arranged on the bracket 4, the shrapnel 2 is fixedly mounted on the inner shell 1, an elastic inner ring frame 21 is arranged in the middle of the shrapnel 2, a first positioning column 41 is arranged on the bracket 4, and the inner ring frame 21 is provided with a first through hole 212 for accommodating the first positioning column 41, the vibration component 3 is fixedly connected to the shrapnel 2 via the bracket 4, and the vibration component 3 is at least partially located in the magnetic field generated by the coil unit 33.

[0035] The annular runway-shaped inner ring frame 21 and outer ring frame 23 can make the vibration of the shrapnel 2 more uniform, can better transmit low-frequency and high-frequency sounds, and provide a better audio experience. This design enables the overall structure to have good supporting performance and better structural strength, which helps to resist external vibration or mechanical stress and improve the durability of the vibrator shrapnel 2; and the setting of the arc portion and the bent portion 220 reduces the structural stress at specific points compared to the right-angle or straight line design, making the vibration of the inner ring frame 21 more uniform and reducing distortion; in addition, this simple and reasonable structural layout optimizes the material cost of the shrapnel 2 and simplifies the assembly process.

[0036] The spring piece 2 in this embodiment is integrally formed by a stamping process. The stamping process ensures accuracy on the basis of achieving the structural shape, provides a guarantee for the stable operation of the vibrator unit, and is conducive to industrialization and optimization of production costs.

[0037] Specifically, at least two first positioning posts 41 are provided, and the two first positioning posts 41 respectively fix the two ends of the bracket 4 on the inner ring frame 21 of the spring sheet 2, and the two first positioning posts 41 are symmetrically arranged along the symmetry axis of the spring sheet 2. In this embodiment, two first positioning posts 41 are provided, and the number of the first positioning posts 41 can be 4 or 6 in actual production.

[0038] Specifically, the spring piece 2 also includes an outer ring frame 23 arranged around the inner ring frame 21, and an elastic arm 22 connected between the inner ring frame 21 and the outer ring frame 23. In this embodiment, an outer extension 211 is extended from the outer side of the inner ring frame 21 to the outer ring frame 23, and an inner extension 231 is extended from the inner side of the outer ring frame 23 to the inner ring frame 21. The two ends of the bending portion 220 are respectively connected to the outer extension 211 and the inner extension 231 via the connecting portion 221; in the process of the inner extension 231 and the outer extension 211 extending to the connecting portion 221, the width of both is gradually reduced, so as to prevent the deformation of the elastic arm 22 caused by the stress concentration phenomenon.

[0039] Specifically, the elastic arm 22 has a bending portion 220 and a connecting portion 221 . The connecting portion 221 is arranged in an arc shape. Two ends of the bending portion 220 are connected to the inner ring frame 21 and the outer ring frame 23 via the connecting portion 221 .

[0040] In this embodiment, the outer extension portion 211, the inner extension portion 231, the connecting portion 221, and the bending portion 220 together constitute a connecting unit, which is connected between the inner ring frame 21 and the outer ring frame 23. A total of four groups of connecting units are provided, which are respectively located at the four corners of the inner ring frame 21 with a circular runway shape. A recessed portion is formed between two adjacent outer extension portions 211, and the recessed portion is intended to increase the distance between the middle portion of the inner ring frame 21 and the outer ring frame 23.

[0041] Specifically, the connecting portion 221 includes a first connecting arm 221a and a second connecting arm 221b, wherein the first connecting arm 221a is connected between the outer extension portion 211 and the bent portion 220, the bent portion 220 is connected between the first connecting arm 221a and the second connecting arm 221b, and the second connecting arm 221b is connected between the bent portion 220 and the inner extension portion 231. By providing two connecting arms, the elastic performance of the spring sheet 2 is improved, and the situation that the spring sheet 2 is easily deformed due to too many connecting arms is reduced.

[0042] The bending portion 220 in the present embodiment is "U"-shaped, that is, the connecting portion 221 is bent 180 degrees. When the vibrator is suspended on the inner ring frame 21 of the spring piece 2, since the outer ring frame 23 is fixedly connected to the inner shell body 1, the inner ring frame 21 bears the vibration force of the vibrator in the direction perpendicular to the surface of the spring piece 2. The "U"-shaped bending portion 220 can evenly disperse the vibration stress to various parts of the vibration arm, thereby ensuring the vibration balance of the vibrator and providing the vibrator with sufficient vibration space.

[0043] Specifically, the elastic arms 22 are provided in plurality, and two adjacent elastic arms 22 are symmetrically arranged along the center line of the spring piece 2. In the present embodiment, the number of the elastic arms 22 is four, and the four elastic arms 22 are symmetrical along the longitudinal center axis and the transverse center axis of the spring piece 2 in pairs; this ensures that the force between the inner ring frame 21 and the outer ring frame 23 is evenly distributed, and the balanced elasticity of the spring piece 2 is maintained.

[0044] Specifically, without distortion, the length of the first connecting arm 221a is less than the length of the second connecting arm 221b. Since the second connecting arm 221b is longer, the vibrator covers a wider frequency range during vibration, thereby affecting the dynamic range of the audio signal and providing more vivid and layered audio.

[0045] Specifically, the surface of the shrapnel 2 is provided with an environmentally friendly galvanized layer 20, and the thickness of the galvanized layer 20 is greater than 5 microns. Since zinc has good corrosion resistance, the setting of the galvanized layer 20 significantly improves the corrosion resistance of the shrapnel 2. If the user wears the earphones for outdoor sports, even if water or sweat enters the earphones, the shrapnel 2 will not be corroded and affect the normal use of the earphones.

[0046] Specifically, the cross-sectional area of ​​the first connecting arm 221a is greater than the cross-sectional area of ​​the second connecting arm 221b. In this embodiment, the width of the first connecting arm 221a is greater than the width of the second connecting arm 221b. The width and shape of the elastic arm 22 directly affect the vibration frequency of the vibrator. This design can optimize the dynamic response of the vibrator, making it more adaptable to specific audio signals or environmental conditions, and optimizing the performance of the vibrator.

[0047] The specifications of the spring piece in this embodiment are as follows: the length of the outer ring frame 23 is 16.8 mm, with an error of no more than 0.03 mm, and the width of the outer ring frame 23 is 8.6 mm, with an error of no more than 0.03 mm; the length of the inner ring frame 21 is 10 mm, and the width is 4.9 mm; the thickness of the spring piece 2 is 0.15 mm, with an error of no more than 0.02 mm; the width of the first connecting arm 221a is 0.4 mm, with an error of no more than 0.01 mm, and the width of the second connecting arm 221b is 0.34 mm, with an error of no more than 0.01 mm.

[0048] Specifically, the shrapnel improved bone conduction earphone vibrator further includes a bracket 4 arranged in the installation cavity 11, a first positioning column 41 is arranged on the bracket 4, a second positioning column 12 is arranged on the inner shell 1, and a first through hole 212 and a second positioning hole 232 are respectively arranged on the inner ring frame 21 and the outer ring frame 23 of the shrapnel 2. The shrapnel 2 is fixedly connected with the inner shell 1 and the bracket 4 through the positioning column and the pin hole of the positioning hole, and the vibration component 3 is suspended on the inner ring frame 21 of the shrapnel 2 via the bracket 4. In this embodiment, the bracket 4 is arranged in a circular runway shape corresponding to the inner ring frame 21.

[0049] In this embodiment, the positioning column is a cylindrical structure, the diameter of the first positioning column 41 is larger than the diameter of the second positioning column 12, a plurality of second positioning columns 12 are provided, and are arranged around the circumferential direction of the inner shell 1, and there are two first positioning columns 41, which are evenly distributed on the inner ring frame 21, and the shape of the positioning hole matches the shape of the positioning column; this design improves the situation in which the vibration effect of the vibrator is affected by the stress concentration of the positioning part relative to the positioning column being square or other shapes, and is easy to install and fix, so that the connection between the spring piece 2, the vibration component 3 and the inner shell 1 is more stable, thereby ensuring the balanced vibration of the vibrator.

[0050] Specifically, the vibration component 3 includes a magnetic bowl 31, a magnetic part 32, a coil unit 33, a magnetic conductive sheet 34 and an electrode sheet 35; the coil unit 33 is arranged around the bracket 4, the magnetic conductive sheet 34 is located inside the coil unit 33, the magnetic part 32 is arranged at the bottom of the magnetic conductive sheet 34, the magnetic bowl 31 is installed at the end of the inner shell 1 and supports the magnetic part 32, the coil unit 33 is electrically connected to the external power supply via the electrode sheet 35, the magnetic part 32, the coil unit 33 and the magnetic conductive sheet 34 are arranged in a circular runway shape, and the shape of the magnetic bowl 31 and the inner shell 1 matches the shape of the coil unit 33; this makes the overall vibrator present a "circular runway shape", and this design helps to provide a larger contact area, ensure the uniform distribution of pressure, reduce the pressure on any single point, and transmit the vibration of the vibrator to the skull more evenly, providing a clearer sound. The working principle of the vibration component 3 is well known in the industry and will not be elaborated on here.

[0051] Specifically, an electrode hole 24 penetrating the inner ring frame 21 is provided in the middle of the inner ring frame 21 of the spring 2, one end of the electrode sheet 35 is electrically connected to the external power supply via the electrode hole 24, and the other end of the electrode sheet 35 is connected to the coil unit 33; in this embodiment, the electrode hole 24 is located between the two first through holes 212 mentioned above.

[0052] Specifically, the shrapnel-modified bone conduction earphone vibrator further comprises an outer shell 5, which is covered on the inner shell 1, and the first positioning column 41 and the electrode sheet 35 are arranged through the outer shell 5. There are two first positioning columns 41, and the two first positioning columns 41 are arranged through the outer shell 5 to make the connection between the vibration component 3 and the shell more stable, thereby improving the vibration effect of the vibrator and thus improving the sound quality of the bone conduction earphone.

[0053] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A shrapnel-modified bone conduction earphone vibrator, comprising an inner housing (1), a shrapnel (2) and a vibration component (3); characterized in that: It also includes a bracket (4) and a coil unit (33) arranged on the bracket (4); the spring sheet (2) is fixedly mounted on the inner shell (1); an elastic inner ring frame (21) is arranged in the middle of the spring sheet (2); a first positioning column (41) is arranged on the bracket (4); the inner ring frame (21) is provided with a first through hole (212) for accommodating the first positioning column (41); the vibration component (3) is fixedly connected to the spring sheet (2) via the bracket (4); and the vibration component (3) is at least partially located in the magnetic field generated by the coil unit (33).

2. The shrapnel-modified bone conduction earphone vibrator according to claim 1, characterized in that: There are a plurality of first positioning columns (41), and the plurality of first positioning columns (41) respectively fix the two ends of the bracket (4) on the inner ring frame (21) of the spring sheet (2).

3. The shrapnel-modified bone conduction earphone vibrator according to claim 1, characterized in that: The number of the first positioning columns (41) is 2, 4 or 6, and the two first positioning columns (41) are symmetrically arranged along the symmetry axis of the spring sheet (2).

4. The shrapnel-modified bone conduction earphone vibrator according to claim 1, characterized in that: The elastic sheet (2) further comprises an outer ring frame (23) arranged around the inner ring frame (21), and an elastic arm (22) connected between the inner ring frame (21) and the outer ring frame (23).

5. The shrapnel-modified bone conduction earphone vibrator according to claim 4, characterized in that: The elastic arm (22) comprises a bending portion (220) and a connecting portion (221); the connecting portion (221) is arranged in an arc shape; two ends of the bending portion (220) are connected to the inner ring frame (21) and the outer ring frame (23) via the connecting portion (221).

6. The shrapnel-modified bone conduction earphone vibrator according to claim 5, characterized in that: The connecting portion (221) includes a first connecting arm (221a) and a second connecting arm (221b), wherein the first connecting arm (221a) is connected between the extension portion (211) and the bending portion (220), the bending portion (220) is connected between the first connecting arm (221a) and the second connecting arm (221b), and the second connecting arm (221b) is connected between the bending portion (220) and the inner extension portion (231).

7. The shrapnel-modified bone conduction earphone vibrator according to claim 4, characterized in that: The elastic arms (22) are multiple in number, and two adjacent elastic arms (22) are symmetrically arranged along the symmetry axis of the spring sheet (2).

8. The shrapnel-modified bone conduction earphone vibrator according to claim 1, characterized in that: The vibration component (3) also includes a magnetic bowl (31), a magnetic part (32) and a magnetic conductive sheet (34); the coil unit (33) has an electrode sheet (35); the magnetic bowl (31) is installed at the bottom of the inner shell (1) and supports the magnetic part (32); the coil unit (33) is electrically connected to an external power source via the electrode sheet (35); and the magnetic part (32) is located in the magnetic field generated by the coil unit (33).

9. The shrapnel-modified bone conduction earphone vibrator according to claim 8, characterized in that: An electrode hole (24) penetrating the inner ring frame (21) is provided in the middle of the inner ring frame (21); one end of the electrode sheet (35) is electrically connected to an external power source via the electrode hole (24); and the other end of the electrode sheet (35) is connected to the coil unit (33).

10. The shrapnel-modified bone conduction earphone vibrator according to claim 8, characterized in that: The shrapnel-modified bone conduction earphone vibrator also includes an outer shell (5), the outer shell (5) is covered on the inner shell (1), the first positioning column (41) and the electrode sheet (35) are arranged through the outer shell (5), and the inner shell (1) is suspended in the cavity formed by the outer shell (5) via the inner ring frame (21) of the shrapnel (2).

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