Bone conduction loudspeaker structure

Abstract

The utility model relates to the technical field of bone conduction earphones, and particularly discloses a bone conduction loudspeaker structure, which comprises an oscillator unit, an elastic sheet and a first shell, a mounting cavity is defined by the first shell, the vibrator unit is movably contained in the mounting cavity through the elastic piece, and the vibrator unit is used for converting an audio electric signal into vibration and transmitting the vibration to the elastic piece; the elastic piece is provided with an annular outer piece, and the annular outer piece is provided with a matching part used for being installed with the first shell in a matched mode. The first shell is provided with a first positioning piece and a clamping groove, the matching part is a positioning hole penetrating through the annular outer piece, the positioning hole is used for containing the first positioning piece, the first positioning piece extends in the thickness direction of the elastic piece, and the annular outer piece of the elastic piece is contained in the clamping groove and is fixedly connected with the first shell through matching of the first positioning piece and a pin hole of the annular outer piece. According to the structure, stable installation of the elastic sheet in the bone conduction loudspeaker is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of bone conduction earphones, and in particular discloses a bone conduction loudspeaker structure. Background Art

[0002] Thanks to technological advances, consumers have switched from using traditional wired headphones to today's wireless headphones. Common wireless headphones include in-ear Bluetooth headphones and bone conduction headphones. Bone conduction headphones are gradually becoming popular among the public because of their non-in-ear design, which provides a better wearing experience. They mainly convert sound into vibrations through the bone conduction vibrator unit. The vibration generated by the bone conduction vibrator unit is achieved through the interaction of its own magnetic field vibration with external shrapnel.

[0003] The bone conduction vibrator is suspended in the earphone housing by a shrapnel. The vibration generated by the vibrator is output through the shrapnel and can be reset by the shrapnel. Therefore, the performance of the shrapnel directly affects the sound quality of the bone conduction earphone vibrator. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a bone conduction speaker structure to ensure that the spring and the vibrator unit form a stable connection, reduce unnecessary vibration and distortion, and thus improve the stability of the sound quality.

[0005] To achieve the above-mentioned purpose, the utility model provides a bone conduction speaker structure, including a vibrator unit, a spring, and a first shell; the first shell is surrounded by an installation cavity, and the vibrator unit is movably accommodated in the installation cavity via the spring, and the vibrator unit is used to convert the audio electrical signal into vibration and transmit the vibration to the spring; the spring has an annular outer plate, and the annular outer plate is provided with a mating portion for mating with the first shell for installation.

[0006] Furthermore, a first positioning piece is provided on the first shell, and the matching portion is a positioning hole penetrating the annular outer sheet, the positioning hole is used to accommodate the first positioning piece, and the annular outer sheet of the spring is fixedly connected to the first shell by means of the first positioning piece and the positioning hole.

[0007] Furthermore, the number of the positioning holes is an even number, and the positioning holes are symmetrically distributed along the symmetry axis of the spring piece.

[0008] Furthermore, the number of the positioning holes is 4, 6 or 8.

[0009] Furthermore, the number of the first positioning members corresponds to the number of the positioning holes, and the first positioning members are extended along the thickness direction of the spring sheet.

[0010] Furthermore, a clamping groove is provided on the first shell, the first positioning member is located in the clamping groove, and the annular outer piece of the spring piece is accommodated in the clamping groove and fixedly connected to the first shell via the first positioning member.

[0011] Furthermore, a holding member is provided on the first shell, and a clamping groove is formed by the holding member surrounded by the holding member on the first shell. The holding member is pressed on the annular outer plate of the spring sheet, and two side surfaces of the annular outer plate of the spring sheet are respectively stopped and abutted by the holding member and the first shell.

[0012] Furthermore, the opening direction of the clamping slot is extended along the X-axis and / or Z-axis direction, and the extending direction of the first positioning member is arranged to intersect with the opening direction of the clamping slot.

[0013] Furthermore, the vibrator unit includes a connecting bracket, a permanent magnet and a magnetic cover located in the installation cavity, a coil unit is provided on the connecting bracket, the permanent magnet is at least partially located in the magnetic field generated by the coil unit, and the coil unit is located in the magnetic cover; the connecting bracket has a second positioning piece used in conjunction with the first positioning piece, the spring sheet has an inner sheet, and the second positioning piece is used to fix the inner sheet of the spring sheet.

[0014] Furthermore, the bone conduction speaker structure also includes a second shell movably accommodated in the installation cavity of the first shell, the vibrator unit is located between the second shell and the connecting bracket, and a protrusion is provided in the middle part of the second shell extending in the thickness direction of the spring sheet, and the protrusion and the connecting bracket clamp the inner sheet of the spring sheet.

[0015] Beneficial effects of the utility model:

[0016] (1) The utility model provides a bone conduction speaker structure, by providing a snap-in groove and a first positioning member on the first shell of the bone conduction earphone, the annular outer sheet of the spring is accommodated in the snap-in groove and the positioning hole on the annular outer sheet is sleeved on the first positioning member, thereby achieving stable limiting;

[0017] (2) The installation cavity formed by the first shell body accommodates the vibrator unit of the bone conduction earphone. The vibrator unit is suspended in the installation cavity by the inner plate of the spring. The vibrator unit has a connecting bracket located in the installation cavity. A second positioning member with a larger diameter is arranged on the connecting bracket to fix the inner plate of the spring. A second shell body is arranged in the installation cavity. The second shell body has a protrusion, which cooperates with the connecting bracket to further clamp the inner plate of the spring to achieve stable installation of the spring. This method ensures the stable connection between the spring and the vibrator unit, and will not touch other components during the vibration process, thereby improving the stability and durability of the spring, and ensuring to the greatest extent that the vibrator transmits high-quality audio signals, providing users with a good user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model in a decomposed state;

[0019] Figure 2 It is a partial cross-sectional view of the utility model;

[0020] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part a;

[0021] Figure 4 It is a structural schematic diagram of the first shell of the utility model;

[0022] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of part b;

[0023] Figure 6 It is a structural schematic diagram of the second housing of the utility model;

[0024] Figure 7 It is a schematic diagram of the combined state structure of the utility model;

[0025] Figure 8 It is a schematic diagram of the structure of the vibrator unit of the utility model in an exploded state.

[0026] Reference numerals include:

[0027] 1—vibrator unit 2—spring 3—first shell

[0028] 4—first positioning member 5—card slot 6—pressing member

[0029] 7—Connecting bracket 8—Second shell

[0030] 21 - inner sheet 22 - elastic sheet 23 - annular outer sheet

[0031] 31 - installation cavity 71 - second positioning member 81 - raised portion

[0032] 230—positioning hole 10—permanent magnet 11—magnetic cover

[0033] 12—coil unit 13—magnetic net 14—magnetic sheet DETAILED DESCRIPTION

[0034] 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.

[0035] See also Figures 1 to 8 As shown, a bone conduction speaker structure of the utility model includes a vibrator unit 1, a spring 2, and a first shell 3; the first shell 3 is surrounded by a mounting cavity 31, and the vibrator unit 1 is movably accommodated in the mounting cavity 31 via the spring, and the vibrator unit 1 is used to convert the audio electrical signal into vibration and transmit the vibration to the spring 2; the spring 2 has an annular outer sheet 23, and the annular outer sheet 23 is provided with a mating portion for mating with the first shell 3 for installation.

[0036] In this embodiment, the first housing 3 is roughly in the shape of a runway, and the first positioning member 4 is arranged on the upper end surface of the first housing 3. The first positioning member 4 penetrates the annular outer sheet 23 of the spring 2, and the length of the first positioning member 4 is set to be equal to the thickness of the annular outer sheet 23 of the spring 2; in actual use, a stopper (not shown in the figure) larger than the diameter of the first positioning member 4 can be arranged at the top end of the first positioning member 4 to stably limit the spring 2 on the first housing 3. Afterwards, the vibrator unit 1 of the bone conduction earphone is suspended in the installation cavity 31 by means of the inner sheet 21 of the spring 2.

[0037] Specifically, a first positioning member 4 is provided on the first shell 3 , and the matching portion is a positioning hole 230 that penetrates the annular outer sheet 23 . The positioning hole 230 is used to accommodate the first positioning member 4 . The annular outer sheet 23 of the spring sheet 2 is fixedly connected to the first shell 3 by means of the first positioning member 4 and the positioning hole 230 .

[0038] Specifically, the number of the positioning holes 230 is an even number, and the positioning holes 230 are symmetrically distributed along the symmetry axis of the spring piece 2 .

[0039] Specifically, the first housing 3 is provided with a clamping groove 5, the first positioning member 4 is located in the clamping groove 5, the first positioning member 4 is extended along the thickness direction of the spring sheet, the annular outer sheet 23 of the spring sheet 2 is accommodated in the clamping groove 5 and is fixedly connected to the first housing 3 via the first positioning member 4. In this embodiment, the clamping groove 5 is arranged to fit the inner wall of the first housing 3, and the clamping groove 5 is in the shape of a runway as a whole. The two side walls of the clamping groove 5 press the spring sheet 2 tightly, and cooperate with the first positioning member 4 to stably position the spring sheet 2 on the first housing 3.

[0040] The installation method adopted in the prior art is to set a protrusion on the annular outer sheet 23 of the spring piece 2, set a groove on the peripheral side of the shell, and use the protrusion and the groove to match to achieve the installation of the spring piece 2. This method causes the spring piece 2 to collide with other parts such as the earphone shell during the vibration process, affecting the vibration effect of the spring piece 2 and ultimately affecting the sound transmission quality. In this solution, the spring piece 2 is accommodated in the snap-fit ​​groove 5 and the positioning piece is used to penetrate the spring piece 2, so that the connection between the spring piece 2 and the vibrator unit 1 and the first shell 3 is more stable, further improving the sound quality.

[0041] Specifically, the first shell 3 is provided with a holding member 6, and the clamping groove 5 is formed by the holding member 6 surrounding the first shell 3. The holding member 6 is held on the annular outer sheet 23 of the spring sheet 1, and the two side surfaces of the annular outer sheet 23 of the spring sheet 2 are respectively stopped and abutted by the holding member 6 and the first shell 3. In the actual manufacturing process, the holding member 6 can be injection molded, for example: after the spring sheet 2 is fixed on the first shell 3 through the first positioning member 4, the melted plastic or silicone is injected through the mold on the first shell 3 by an injection molding tool to form the holding member 6, so as to fix the spring sheet 2; or, the first shell 3 and the holding member 6 are injection molded separately and then spliced ​​and installed to fix the spring sheet.

[0042] Specifically, the number of the positioning holes 230 is 4, 6 or 8, the number of the first positioning members 4 is set corresponding to the number of the positioning holes 230, and the first positioning members 4 are extended along the thickness direction of the spring. Multiple first positioning members 4 are symmetrically arranged along the center line of the first shell 3. In this embodiment, the number of the first positioning members 4 is 8, 2 in the width direction and 6 in the length direction. The first positioning members 4 symmetrically distributed along the center line of the first shell 3 help to ensure that the annular outer sheet 23 of the spring 2 is evenly fixed in the device, ensuring that the vibration can be evenly propagated on the surface of the entire vibrator unit 1; it can reduce the sound distortion caused by the uneven fixation of the spring 2, so that the vibrator unit 1 will not be subject to additional irregular interference when vibrating, thereby improving the clarity and accuracy of the sound.

[0043] Specifically, the opening direction of the snap-in slot 5 is extended along the X-axis and / or Z-axis direction, and the extension direction of the first positioning member 4 is arranged to intersect with the opening direction of the snap-in slot 5. In this embodiment, the opening direction of the snap-in slot 5 is the direction in which the side wall of the first shell 3 extends toward the hollow portion surrounded by the first shell 3. When the annular outer sheet 23 of the spring sheet 2 is accommodated in the snap-in slot 5, it is ensured that the spring sheet 2 will not be separated from the first shell 3 when vibrating along its own thickness direction, thereby increasing its stability. In this embodiment, the X-axis direction refers to the length direction of the first shell 3, the Y-axis direction refers to the width direction of the first shell 3, and the Z-axis direction refers to the thickness direction of the spring sheet 2 and also refers to the extension direction of the first positioning member 4.

[0044] Specifically, the vibrator unit 1 has a connecting bracket 7 located in the installation cavity 31, and the connecting bracket 7 has a second positioning member 71 used in conjunction with the first positioning member 4. The first positioning member 4 is used to fix the annular outer sheet 23 of the spring 2, and the second positioning member 71 is used to fix the inner sheet 21 of the spring 2. The first shell 3 is located at the periphery of the connecting bracket 7, and the connecting bracket 7 is suspended in the first shell 3 through the spring 2. The connecting bracket 7 is made of plastic. The lower end of the connecting bracket 7 is a magnetic circuit mechanism in the bone conduction earphone vibrator unit 1. One end of the electrode sheet in the magnetic circuit mechanism is connected to the coil, and the other end passes through the connecting bracket 7 to conduct the external power supply; the second positioning member 71 is located in the middle of the first shell 3, and is arranged in conjunction with the position of the above-mentioned first positioning member 4 to respectively fix the inner sheet 21 and the annular outer sheet 23 of the spring 2, so as to ensure the stable operation of the elastic sheet 22 between the annular outer sheet 23 and the inner sheet 21 of the spring 2.

[0045] Specifically, the bone conduction speaker structure further includes a second housing 8 movably accommodated in the mounting cavity 31 of the first housing 3, the vibrator unit 1 is located between the second housing 8 and the connecting bracket 7, and a protrusion 81 is provided in the middle of the second housing 8 extending in the thickness direction of the spring sheet, and the protrusion 81 and the connecting bracket 7 clamp the inner sheet 21 of the spring sheet 2. The middle of the second housing 8 is recessed downward to form the protrusion 81; in this embodiment, the middle of the connecting bracket 7 protrudes upward to cooperate with the protrusion 81 formed by the second housing 8 to squeeze the spring sheet, further stabilizing and limiting the inner sheet 21 of the spring sheet 2.

[0046] Specifically, the second positioning member 71 is arranged through the second shell 8. The second positioning member 71 penetrates the second shell 8 to ensure that the position of the connecting bracket 7 in the installation cavity 31 is stable, and will not be offset due to the vibration of the vibrator. Compared with the second positioning member 71 not penetrating the second shell 8 but only contacting the inner wall of the second shell 8 or not contacting the second shell 8, this method can ensure the stability of the connecting bracket 7 to the greatest extent, further ensure the vibration effect of the spring 2 in the installation cavity 31, will not be offset during use, and improve the positioning effect of the spring 2.

[0047] Specifically, the positioning member is cylindrical. In this embodiment, the first positioning member 4 and the second positioning member 71 are both cylindrical. In actual use, the cylindrical positioning member can provide a more uniform stress distribution, while other shapes may concentrate stress in certain areas, such as the stress at the corners of a rectangular parallelepiped is significantly greater than that at its periphery, and the uniform stress distribution can reduce the deformation and stress concentration of the vibrator blade during vibration, and improve its performance and durability; in addition, the cylindrical positioning member is easier to manufacture and process, which helps to simplify the production process, reduce manufacturing costs, and improve production efficiency.

[0048] Specifically, the vibrator unit 1 includes a connecting bracket 7, a permanent magnet 10 and a magnetic cover 11 located in the installation cavity 31, a coil unit 12 is provided on the connecting bracket 7, the permanent magnet 10 is at least partially located in the magnetic field generated by the coil unit 12, and the coil unit 12 is located in the magnetic cover 11; the connecting bracket 7 has a second positioning member 71 used in conjunction with the first positioning member 4, the spring sheet 2 has an inner sheet 21, and the second positioning member 71 is used to fix the inner sheet 21 of the spring sheet 2. In this embodiment, the vibrator unit 1 also includes a magnetic net 13 and a magnetic conductive sheet 14, the magnetic net 13 is located between the first shell 3 and the permanent magnet 10, and the magnetic conductive sheet 14 is arranged on the permanent magnet 10.

[0049] Specifically, the cross-sectional area of ​​the second positioning member 71 is greater than the cross-sectional area of ​​the first positioning member 4. In this embodiment, both positioning members are cylindrical positioning columns, and the diameter of the second positioning member 71 is greater than the diameter of the first positioning member 4. Due to the design and construction of the spring 2 itself, the elastic sheet 22 between the annular outer sheet 23 and the inner sheet 21 of the spring 2 is the main component, so the middle area of ​​the spring 2 accounts for a large proportion. If the second positioning member 71 has the same diameter as the first positioning member 4, the vibration resistance of the middle part of the spring 2 will be weakened during the vibration process, and it is easy to resonate with the elastic sheet 22, affecting the vibration effect of the spring 2; while the second positioning member 71 with a larger diameter can improve the vibration resistance of the middle part of the spring 2, ensuring that the spring 2 will not affect the normal operation of the elastic sheet 22 during the vibration process, and ensuring that the spring 2 will not be deformed or damaged.

[0050] 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 bone conduction speaker structure, comprising a vibrator unit (1), a spring (2), and a first shell (3); characterized in that: The first shell (3) is surrounded by a mounting cavity (31), and the vibrator unit (1) is movably accommodated in the mounting cavity (31) via a spring sheet (2). The vibrator unit (1) is used to convert an audio electrical signal into vibration and transmit the vibration to the spring sheet (2); the spring sheet (2) has an annular outer sheet (23), and the annular outer sheet (23) is provided with a matching portion for matching and mounting with the first shell (3).

2. A bone conduction speaker structure according to claim 1, characterized in that: The first shell (3) is provided with a first positioning member (4); the matching portion is a positioning hole (230) penetrating the annular outer plate (23); the positioning hole (230) is used to accommodate the first positioning member (4); the annular outer plate (23) of the spring sheet (2) is fixedly connected to the first shell (3) by means of the first positioning member (4) and the positioning hole (230).

3. A bone conduction speaker structure according to claim 2, characterized in that: The number of the positioning holes (230) is an even number, and the positioning holes (230) are symmetrically distributed along the symmetry axis of the spring sheet (2).

4. A bone conduction speaker structure according to claim 3, characterized in that: The number of the positioning holes (230) is 4, 6 or 8.

5. The bone conduction speaker structure according to claim 3, characterized in that: The number of the first positioning members (4) is set corresponding to the number of the positioning holes (230), and the first positioning members (4) are extended along the thickness direction of the spring sheet (2).

6. The bone conduction speaker structure according to claim 2, characterized in that: The first shell (3) is provided with a clamping groove (5), the first positioning member (4) is located in the clamping groove (5), and the annular outer sheet (23) of the spring sheet (2) is accommodated in the clamping groove (5) and fixedly connected to the first shell (3) via the first positioning member (4).

7. A bone conduction speaker structure according to claim 6, characterized in that: A holding member (6) is provided on the first shell (3), and the clamping groove (5) is formed by the holding member (6) surrounding the first shell (3). The holding member (6) is pressed on the annular outer plate (23) of the spring sheet (2), and the two side surfaces of the annular outer plate (23) of the spring sheet (2) are respectively stopped and abutted by the holding member (6) and the first shell (3).

8. The bone conduction speaker structure according to claim 6, characterized in that: The opening direction of the clamping slot (5) is extended along the X-axis and / or Z-axis direction, and the extension direction of the first positioning member (4) is arranged to intersect with the opening direction of the clamping slot (5).

9. The bone conduction speaker structure according to claim 1, characterized in that: The vibrator unit (1) comprises a connecting bracket (7), a permanent magnet (10) and a magnetic cover (11) located in the installation cavity (31); a coil unit (12) is provided on the connecting bracket (7); the permanent magnet (10) is at least partially located in the magnetic field generated by the coil unit (12); the coil unit (12) is located in the magnetic cover (11); the connecting bracket (7) has a second positioning member (71) used in conjunction with the first positioning member (4); the spring sheet (2) has an inner sheet (21); and the second positioning member (71) is used to fix the inner sheet (21) of the spring sheet (2).

10. The bone conduction speaker structure according to claim 1, characterized in that: The bone conduction speaker structure further comprises a second shell (8) movably accommodated in the mounting cavity (31) of the first shell (3); the vibrator unit (1) is located between the second shell (8) and the connecting bracket (7); a protrusion (81) is provided in the middle of the second shell (8) extending in the thickness direction of the spring sheet; the spring sheet (2) further comprises an inner sheet (21); the protrusion (81) and the connecting bracket (7) clamp the inner sheet (21) of the spring sheet (2).

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