CN209964283U - Double magnetic circuit bone conduction vibrator - Google Patents

Abstract

The utility model belongs to the technical field of loudspeakers, in particular to a double magnetic circuit bone conduction vibrator, comprising a U-shaped iron, an annular outer magnet, an inner magnet, a voice coil, a conductive elastic wave and a conductive sheet; a groove with an opening is formed in the U iron, the conductive elastic wave is connected to the U iron, the voice coil is connected to the conductive elastic wave and electrically connected with the conductive elastic wave, and the conducting sheet is connected with the voice coil and located outside the groove; the inner magnet is arranged in the groove, an inner washer is arranged at the top of the inner magnet, the annular outer magnet is sleeved on the inner magnet, an annular outer washer is arranged at the top of the annular outer magnet, an annular magnetic gap is formed between the inner side wall of the annular outer washer and the outer side wall of the inner washer, and one end of the voice coil extends into the annular magnetic gap; the magnetic induction lines in the annular magnetic gap are greatly increased through the magnetic conduction action of the inner washer and the annular outer washer, and the double-magnetic-circuit function is realized in the annular magnetic gap, so that the magnetic field force in the double-magnetic-circuit bone conduction vibrator is increased.

Description

Double magnetic circuit bone conduction vibrator

Technical Field

The utility model belongs to the technical field of the speaker, especially, relate to a double magnetic circuit bone conduction oscillator.

Background

The sound conduction mode comprises air vibration and bone conduction; wherein, the bone conduction is transmitted to the auditory nerve of the human through the skin, subcutaneous tissue and skeleton of the human, thereby leading the human to hear the sound; the design mode that generally uses single magnet in the osteoacusis oscillator of prior art, the magnetic field intensity in this type osteoacusis oscillator is not enough, and the sensitivity and the amplitude of voice coil loudspeaker voice coil can not satisfy the demand, lead to the transmission effect of osteoacusis oscillator not good, in order to reach the demand, strengthens magnetic field intensity through the mode that increases power often, leads to the osteoacusis oscillator to consume energy more.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two magnetic circuit bone conduction oscillators, it is not enough to aim at solving because of the inside magnetic field intensity of bone conduction oscillator among the prior art, and the technical problem that leads to the sensitivity and the amplitude decline of voice coil loudspeaker voice coil.

In order to achieve the above object, an embodiment of the present invention provides a dual magnetic circuit bone conduction vibrator, which includes a U-iron, an annular outer magnet, an inner magnet, a voice coil, a conductive elastic wave and a conductive sheet; a groove with an opening is formed in the U iron, the conductive elastic wave is connected to the U iron, the voice coil is connected to the conductive elastic wave and electrically connected with the conductive elastic wave, and the conducting piece is connected with the voice coil and located outside the groove;

the inner magnet is arranged in the groove, an inner washer is arranged at the top of the inner magnet, the annular outer magnet is sleeved on the inner magnet, an annular outer washer is arranged at the top of the annular outer magnet, an annular magnetic gap is formed between the inner side wall of the annular outer washer and the outer side wall of the inner washer, and one end of the voice coil extends into the annular magnetic gap.

Optionally, the U-iron includes a small diameter cylinder, a large diameter cylinder, and a connection ring connected between the small diameter cylinder and the large diameter cylinder, and the conductive bullet wave is connected to an open end of the large diameter cylinder.

Optionally, the dual magnetic circuit bone conduction vibrator further comprises a bracket; the support is connected to the U-shaped iron, and the conductive elastic wave is connected to the support.

Optionally, the dual-magnetic circuit bone conduction vibrator further comprises a first spring plate; one end of the first elastic sheet is connected to the outer side wall of the U-shaped iron, and the other end of the first elastic sheet is connected to the support.

Optionally, the dual-magnetic circuit bone conduction vibrator further comprises a second elastic sheet; the second elastic sheet is connected with the voice coil and is positioned between the conductive elastic wave and the conductive sheet.

Optionally, a first through hole is formed in the inner washer, a second through hole penetrating through the inner magnet is formed in the top of the inner magnet, a third through hole is formed in the bottom of the U-shaped iron, and the first through hole, the second through hole and the third through hole are communicated in sequence.

Optionally, the dual magnetic circuit bone conduction vibrator further comprises a tuning net; and the tuning net is connected to the outer side wall of the U-shaped iron and covers the third through hole.

Optionally, the dual magnetic circuit bone conduction vibrator further comprises a flexible circuit; the flexible circuit is electrically connected with the voice coil and sequentially penetrates through the first through hole, the second through hole and the third through hole.

Optionally, the conductive elastic wave comprises an outer ring, an inner ring and a plurality of connecting portions uniformly connected between the outer ring and the inner ring, and at least one welding point for electrical connection is arranged on each of the outer ring and the inner ring.

Optionally, the dual magnetic circuit bone conduction vibrator further comprises a connector and a circuit board; the connecting piece with electrically conductive bullet ripples is connected and both ends extend to respectively electrically conductive bullet ripples's relative both sides, the conduction piece is located outside the recess and with the connecting piece is connected, the circuit board is located within the recess and with the connecting piece is connected, the circuit board with voice coil loudspeaker voice coil fixed connection, just the circuit board with electrically conductive bullet ripples with the voice coil loudspeaker voice coil electricity is connected.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the double magnetic circuit bone conduction oscillator have one of following technological effect at least: the annular outer magnet is additionally arranged on the periphery of the inner magnet, after the double-magnetic-circuit bone conduction vibrator is electrified, magnetic induction lines in the annular magnetic gap are greatly increased through the magnetic conduction effect of the inner washer and the annular outer washer, the double-magnetic-circuit function is realized in the annular magnetic gap, the magnetic field force in the double-magnetic-circuit bone conduction vibrator is increased, the acting force of the voice coil in the annular magnetic gap is increased, the sensitivity and the amplitude of the voice coil are improved, and therefore the transmission effect of the double-magnetic-circuit bone conduction vibrator is improved.

The utility model also provides a double magnetic circuit bone conduction vibrator, which comprises a U-shaped iron, an annular outer magnet, an inner magnet, a voice coil, a conductive elastic wave, a second elastic sheet, a connecting piece and a conduction sheet; a groove with an opening is formed in the U iron, the second elastic sheet is connected to the U iron, the connecting piece is connected with the second elastic sheet, two ends of the connecting piece extend to two opposite sides of the second elastic sheet respectively, the voice coil is connected with the connecting piece and located in the groove, the conducting piece is connected with the connecting piece and located outside the groove, the conducting elastic wave is connected with the connecting piece and located between the conducting piece and the second elastic sheet, and the conducting elastic wave is electrically connected with the voice coil;

the inner magnet is arranged in the groove, an inner washer is arranged at the top of the inner magnet, the annular outer magnet is sleeved on the inner magnet, an annular outer washer is arranged at the top of the annular outer magnet, an annular magnetic gap is formed between the inner side wall of the annular outer washer and the outer side wall of the inner washer, and one end of the voice coil extends into the annular magnetic gap.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the double magnetic circuit bone conduction oscillator have one of following technological effect at least: the annular outer magnet is additionally arranged on the periphery of the inner magnet, after the double-magnetic-circuit bone conduction vibrator is electrified, magnetic induction lines in the annular magnetic gap are greatly increased through the magnetic conduction action of the inner washer and the annular outer washer, the double-magnetic-circuit function is realized in the annular magnetic gap, the magnetic field force in the double-magnetic-circuit bone conduction vibrator is increased, the acting force of the voice coil in the annular magnetic gap is increased, the sensitivity and the amplitude of the voice coil are improved, and therefore the transmission effect of the double-magnetic-circuit bone conduction vibrator is improved; the second elastic sheet is additionally arranged and is used for being connected with the inner side wall of the listening device, so that the connecting piece is more stable, the overall stability and reliability are improved, and the safety performance is good.

The utility model also provides a double magnetic circuit bone conduction vibrator, which comprises an annular outer magnet, an inner magnet, a voice coil, a conductive elastic wave, a conductive sheet, a bottom plate for preventing magnetic leakage and a antimagnetic cover; the antimagnetic shield is connected to the bottom plate, an accommodating space is arranged in the antimagnetic shield, the conductive elastic wave is connected to the antimagnetic shield, the voice coil is connected to the conductive elastic wave and electrically connected with the conductive elastic wave, and the conducting piece is connected with the voice coil and located outside the accommodating space;

the inner magnet is arranged in the accommodating space, an inner washer is arranged at the top of the inner magnet, the annular outer magnet is sleeved on the inner magnet, an annular outer washer is arranged at the top of the annular outer magnet, an annular magnetic gap is formed between the inner side wall of the annular outer washer and the outer side wall of the inner washer, and one end of the voice coil extends into the annular magnetic gap.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the double magnetic circuit bone conduction oscillator have one of following technological effect at least: the annular outer magnet is additionally arranged on the periphery of the inner magnet, after the double-magnetic-circuit bone conduction vibrator is electrified, magnetic induction lines in the annular magnetic gap are greatly increased through the magnetic conduction action of the inner washer and the annular outer washer, the double-magnetic-circuit function is realized in the annular magnetic gap, the magnetic field force in the double-magnetic-circuit bone conduction vibrator is increased, the acting force of the voice coil in the annular magnetic gap is increased, the sensitivity and the amplitude of the voice coil are improved, and therefore the transmission effect of the double-magnetic-circuit bone conduction vibrator is improved; the antimagnetic cover and the bottom plate play a role in magnetic leakage prevention, so that the annular magnet and the inner magnet are separated from the outside, and the influence of the internal magnetic circuit of the double-magnetic-circuit bone conduction vibrator on other spare and accessory parts is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings 1 to 12 in the following descriptions are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a dual-magnetic-circuit bone conduction vibrator according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a dual-magnetic-circuit bone conduction vibrator according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a dual-magnetic-circuit bone conduction vibrator according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a dual-magnetic-circuit bone conduction vibrator according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a dual-magnetic-circuit bone conduction vibrator according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a dual-magnetic-circuit bone conduction vibrator according to an embodiment of the present invention

Fig. 7 is a schematic structural diagram of a dual-magnetic-circuit bone conduction vibrator according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a dual-magnetic-circuit bone conduction vibrator according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a dual-magnetic-circuit bone conduction vibrator according to an embodiment of the present invention.

Fig. 10 is a schematic structural diagram of a dual-magnetic-circuit bone conduction vibrator according to an embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a dual-magnetic-circuit bone conduction vibrator according to a third embodiment of the present invention.

Fig. 12 is a schematic structural diagram of a conductive elastic wave according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10-U iron 11-groove 12-small diameter cylinder

13-large diameter cylinder 14-connecting ring 15-third through hole

20-annular outer magnet 21-annular outer washer 30-inner magnet

31-inner washer 32-first through hole 33-second through hole

40-voice coil 50-conductive elastic wave 51-outer ring

52-inner ring 53-connecting part 60-conducting piece

70-support 80-first elastic sheet 90-second elastic sheet

100-annular magnetic gap 110-tuning net 120-flexible circuit

130-connecting piece 140-circuit board 150-bottom plate

160-antimagnetic cover 200-containing space.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-11 are exemplary and intended to be used to illustrate embodiments of the present invention, and should not be construed as limiting the invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

Example one

In the present embodiment, as shown in fig. 1, a dual magnetic circuit bone conduction vibrator is provided, which comprises a U-iron 10, an annular outer magnet 20, an inner magnet 30, a voice coil 40, a conductive elastic wave 50 and a conductive sheet 60; a groove 11 with an opening is formed in the U-shaped iron 10, the conductive damper 50 is connected to the U-shaped iron 10, the voice coil 40 is connected to the conductive damper 50 and electrically connected with the conductive damper 50, and the conducting strip 60 is connected with the voice coil 40 and located outside the groove 11; the inner magnet 30 is arranged in the groove 11, the top of the inner magnet 30 is provided with an inner washer 31, the annular outer magnet 20 is sleeved on the inner magnet 30, the top of the annular outer magnet 20 is provided with an annular outer washer 21, an annular magnetic gap 100 is formed between the inner side wall of the annular outer washer 21 and the outer side wall of the inner washer 31, and one end of the voice coil 40 extends into the annular magnetic gap 100.

The embodiment of the utility model provides an in, add annular outer magnet 20 in the periphery of inner magnet 30, after the circular telegram of two magnetic circuit bone conduction oscillator, make the magnetism in the annular magnetic gap 100 to feel line greatly increased through interior magnificent department 31 and the outer magnificent department 21 magnetic conduction effect of annular, realize two magnetic circuit functions in annular magnetic gap 100, make the inside magnetic field force of two magnetic circuit bone conduction oscillator increase, the effort grow that voice coil loudspeaker voice coil 40 received in annular magnetic gap 100, improve the sensitivity and the amplitude of voice coil loudspeaker voice coil 40, thereby improve the transmission effect of two magnetic circuit bone conduction oscillator.

In the embodiment of the present invention, as shown in fig. 2, the U-iron 10 includes a small diameter cylinder 12, a large diameter cylinder 13, and a connection ring 14 connected between the small diameter cylinder 12 and the large diameter cylinder 13, and the conductive elastic wave 50 is connected to an open end of the large diameter cylinder 13; the outer diameter of the large-diameter cylinder 13 is larger than that of the small-diameter cylinder 12, the vertical section of the small-diameter cylinder 12 is U-shaped, the inner magnet 30 and the annular outer magnet 20 are both arranged in the small-diameter cylinder 12, the inner ring part of the connecting ring 14 is connected with the opening end of the small-diameter cylinder 12, the large-diameter cylinder 13 is connected to the outer circle part of the connecting ring 14, and the conductive elastic wave 50 is connected to the opening end of the large-diameter cylinder 13; the small-diameter cylinder 12, the large-diameter cylinder 13 and the connecting ring 14 are integrally formed, the structure is stable, processing and production are facilitated, the large-diameter cylinder 13 is arranged, the conductive elastic wave 50 is directly connected to the large-diameter cylinder 13 to be fixed, the structure is stable, and production is facilitated.

In the embodiment of the present invention, as shown in fig. 3, the dual magnetic circuit bone conduction vibrator further includes a bracket 70; the bracket 70 is connected to the U-shaped iron 10, and the conductive elastic wave 50 is connected to the bracket 70; the voice coil 40 drives the conductive damper 50 to vibrate when vibrating, and the sectional shape of the support 70 is L-shaped in this embodiment, but is not limited to this shape; due to the arrangement of the bracket 70, the bracket vibrates synchronously with the conductive damper 50, so that the U-shaped iron 10 also vibrates along with the vibration of the voice coil 40, and a good bass effect is generated; meanwhile, the support 70 can play a role in preventing magnetic leakage, the influence of the internal magnetic circuit of the double-magnetic-circuit bone conduction vibrator on other parts is reduced, and the support 70 can be made of plastic and other materials.

Further, a pad is provided on the bracket 70.

In the embodiment of the present invention, as shown in fig. 4, the dual magnetic circuit bone conduction vibrator further includes a first elastic sheet 80; one end of the first elastic sheet 80 is connected to the outer side wall of the U-shaped iron 10, and the other end of the first elastic sheet 80 is connected to the bracket 70; when the voice coil 40 vibrates, the first elastic sheet 80, the conductive elastic wave 50 and the bracket 70 vibrate synchronously, so that the bass effect is further improved, and the tone quality is improved.

In the embodiment of the present invention, as shown in fig. 5, the dual magnetic circuit bone conduction vibrator further includes a second elastic sheet 90; the second elastic sheet 90 is connected with the voice coil 40 and is positioned between the conductive elastic wave 50 and the conductive sheet 60; the second elastic sheet 90 is connected with an external listening device, so that the stability of the conducting sheet 60 and the voice coil 40 is improved, the reliability of the bone conduction vibrator is improved, and the safety performance is good.

In the embodiment of the present invention, as shown in fig. 6, a first through hole 32 is provided on the inner washer 31, a second through hole 33 penetrating through the inner magnet 30 is provided at the top of the inner magnet 30, a third through hole 15 is provided at the bottom of the U-shaped iron 10, and the first through hole 32, the second through hole 33 and the third through hole 15 are sequentially communicated; the first through hole 32, the second through hole 33 and the third through hole 15 are arranged, so that the inside of the double-magnetic-circuit bone conduction vibrator is radiated, and the temperature inside the double-magnetic-circuit bone conduction vibrator is reduced when the double-magnetic-circuit bone conduction vibrator works; and secondly, improving the low-frequency effect and reducing distortion, and reducing the situation that the voice coil 40 and the conducting piece 60 are deviated due to the fact that air flow generated by the vibration of the voice coil 40 and the conducting piece 60 of the double-magnetic-circuit bone conduction vibrator reaches the outside through the first through hole 32, the second through hole 33 and the third through hole 15.

In the embodiment of the present invention, as shown in fig. 6, the dual magnetic circuit bone conduction vibrator further includes a tuning net 110; the tuning net 110 is connected to the outer side wall of the U-shaped iron 10 and covers the third through hole 15; the tuning net 110 is additionally arranged so that the tone quality effect of the double-magnetic-circuit bone conduction vibrator is improved, meanwhile, the third through hole 15 is sealed, the sound production effect of the double-magnetic-circuit bone conduction vibrator is reduced due to the fact that external dust particles enter the double-magnetic-circuit bone conduction vibrator through the third through hole 15, and the stability of the double-magnetic-circuit bone conduction vibrator is improved.

In the embodiment of the present invention, as shown in fig. 7, the dual magnetic circuit bone conduction vibrator further includes a flexible circuit 120; the flexible circuit 120 is electrically connected with the voice coil 40 and sequentially passes through the first through hole 32, the second through hole 33 and the third through hole 15; flexible line 120 chooses PCBA to make for use, replaces using among the prior art voice coil loudspeaker voice coil lead wire and external power source to carry out the mode of circular telegram, reduces the condition that double-magnetic circuit bone conduction oscillator is out of order, improves stability, improves double-magnetic circuit bone conduction oscillator's quality, increase of service life.

In the embodiment of the present invention, as shown in fig. 12, the conductive damper 50 includes an outer ring 51, an inner ring 52, and a plurality of connecting portions 53 uniformly connected between the outer ring 51 and the inner ring 52, and at least one welding point for electrical connection is disposed on each of the outer ring 51 and the inner ring 52; the thickness range of the conductive elastic wave 50 is 0.05 mm-3 mm; the connection part 53 is S-shaped, but not limited to this shape, and the connection part 53 connects and supports the inner ring 52, so that the outer ring 51 and the inner ring 52 increase the vibration of the voice coil 40, reduce power consumption, improve the mechanical efficiency of bone conduction, and improve the quality of the dual-magnetic-circuit bone conduction vibrator.

In the embodiment of the present invention, as shown in fig. 8, the dual magnetic circuit bone conduction vibrator further includes a connecting member 130 and a circuit board 140; the connecting member 130 is connected to the conductive damper 50, and both ends of the connecting member extend to opposite sides of the conductive damper 50, the conductive plate 60 is located outside the groove 11 and connected to the connecting member 130, the circuit board 140 is located inside the groove 11 and connected to the connecting member 130, the circuit board 140 is fixedly connected to the voice coil 40, and the circuit board 140 is electrically connected to the conductive damper 50 and the voice coil 40; the conductive elastic wave 50 is connected with an external power supply, so that the circuit board 140 and the voice coil 40 are electrified through the circuit board 140, and the voice coil 40 vibrates in a magnetic gap, so that the mode that the voice coil lead is electrified with the external power supply in the prior art is replaced, the sound loss of the double-magnetic-circuit bone conduction vibrator is reduced, the stability is improved, the quality of the double-magnetic-circuit bone conduction vibrator is improved, and the service life is prolonged; the voice coil 40 vibrates to drive the conductive damper 50 to vibrate.

Further, as shown in fig. 9, the second elastic sheet 90 is connected to the connecting member 130 and located between the conductive sheet 60 and the conductive elastic wave 50; the second elastic sheet 90 is additionally arranged and is used for being connected with the inner side wall of the listening device, so that the connecting piece 130 is more stable, the overall stability and reliability are improved, and the safety performance is good.

Example two

The utility model also provides a double magnetic circuit bone conduction vibrator, as shown in fig. 10, which comprises a U-shaped iron 10, an annular outer magnet 20, an inner magnet 30, a voice coil 40, a conductive elastic wave 50, a second elastic sheet 90, a connecting piece 130 and a conductive sheet 60; a groove 11 with an opening is formed in the U-shaped iron 10, the second elastic sheet 90 is connected to the U-shaped iron 10, the connecting piece 130 is connected with the second elastic sheet 90, two ends of the connecting piece 130 extend to two opposite sides of the second elastic sheet 90 respectively, the voice coil 40 is connected with the connecting piece 130 and located in the groove 11, the conducting piece 60 is connected with the connecting piece 130 and located outside the groove 11, the conducting elastic wave 50 is connected with the connecting piece 130 and located between the conducting piece 60 and the second elastic sheet 90, and the conducting elastic wave 50 is electrically connected with the voice coil 40; the inner magnet 30 is arranged in the groove 11, the top of the inner magnet 30 is provided with an inner washer 31, the annular outer magnet 20 is sleeved on the inner magnet 30, the top of the annular outer magnet 20 is provided with an annular outer washer 21, an annular magnetic gap 100 is formed between the inner side wall of the annular outer washer 21 and the outer side wall of the inner washer 31, and one end of the voice coil 40 extends into the annular magnetic gap 100.

In the embodiment of the present invention, the annular outer magnet 20 is added to the periphery of the inner magnet 30, after the dual magnetic circuit bone conduction vibrator is powered on, the magnetic induction lines in the annular magnetic gap 100 are greatly increased through the magnetic conduction action of the inner washer 31 and the annular outer washer 21, the dual magnetic circuit function is realized in the annular magnetic gap 100, the magnetic field force inside the dual magnetic circuit bone conduction vibrator is increased, the acting force received by the voice coil 40 in the annular magnetic gap 100 is increased, the sensitivity and the amplitude of the voice coil 40 are improved, and thus the transmission effect of the dual magnetic circuit bone conduction vibrator is improved; the second elastic sheet 90 is additionally arranged, and the second elastic sheet 90 is used for being connected with the inner side wall of the listening device, so that the connecting piece 130 is more stable, the overall stability and reliability are improved, and the safety performance is good.

Further, a pad is connected to the conductive damper 50.

Further, as shown in fig. 10, the dual magnetic circuit bone conduction vibrator further includes a circuit board 140, the voice coil 40 is fixedly connected to the circuit board 140 and electrically connected to the circuit board 140, and the circuit board 140 is electrically connected to the conductive elastic wave 50.

Further, as shown in fig. 10, a first through hole 32 is formed in the inner washer 31, a second through hole 33 penetrating through the inner magnet 30 is formed in the top of the inner magnet 30, a third through hole 15 is formed in the bottom of the U-shaped iron 10, and the first through hole 32, the second through hole 33 and the third through hole 15 are sequentially communicated; the first through hole 32, the second through hole 33 and the third through hole 15 are arranged, so that the inside of the double-magnetic-circuit bone conduction vibrator is radiated, and the temperature inside the double-magnetic-circuit bone conduction vibrator is reduced when the double-magnetic-circuit bone conduction vibrator works; and secondly, improving the low-frequency effect and reducing distortion, and reducing the situation that the voice coil 40 and the conducting piece 60 are deviated due to the fact that air flow generated by the vibration of the voice coil 40 and the conducting piece 60 of the double-magnetic-circuit bone conduction vibrator reaches the outside through the first through hole 32, the second through hole 33 and the third through hole 15.

Further, as shown in fig. 10, the tuning net 110 is attached to the outer side wall of the housing and covers the third through hole 15; the tuning net 110 is additionally arranged so that the tone quality effect of the double-magnetic-circuit bone conduction vibrator is improved, meanwhile, the third through hole 15 is sealed, the sound production effect of the double-magnetic-circuit bone conduction vibrator is reduced due to the fact that external dust particles enter the double-magnetic-circuit bone conduction vibrator through the third through hole 15, and the stability of the double-magnetic-circuit bone conduction vibrator is improved.

Further, as shown in fig. 10, the dual magnetic circuit bone conduction vibrator further includes a flexible wire 120; the flexible circuit 120 is electrically connected with the conductive damper 50 and sequentially passes through the first through hole 32, the second through hole 33 and the third through hole 15; flexible line 120 chooses the PCBA board for use, replaces using voice coil loudspeaker voice coil lead wire and external power source to carry out the mode of circular telegram among the prior art, reduces the condition that double-magnetic circuit bone conduction oscillator is out of order, improves stability, improves double-magnetic circuit bone conduction oscillator's quality, increase of service life.

EXAMPLE III

The utility model also provides a double magnetic circuit bone conduction vibrator, as shown in fig. 11, comprising an annular outer magnet 20, an inner magnet 30, a voice coil 40, a conductive elastic wave 50, a conductive sheet 60, a bottom plate 150 and a antimagnetic cover 160 which are respectively used for magnetic leakage prevention; the antimagnetic cover 160 is connected to the bottom plate 150, the antimagnetic cover 160 is provided with an accommodating space 200 therein, the conductive damper 50 is connected to the antimagnetic cover 160, the voice coil 40 is connected to the conductive damper 50 and electrically connected to the conductive damper 50, and the conductive sheet 60 is connected to the voice coil 40 and located outside the accommodating space; the inner magnet 30 is arranged in the accommodating space 200, the top of the inner magnet 30 is provided with the inner washer 31, the annular outer magnet 20 is sleeved on the inner magnet 30, the top of the annular outer magnet 20 is provided with the annular outer washer 21, an annular magnetic gap 100 is formed between the inner side wall of the annular outer washer 21 and the outer side wall of the inner washer 31, and one end of the voice coil 40 extends into the annular magnetic gap 100.

In the embodiment of the present invention, the annular outer magnet 20 is added to the periphery of the inner magnet 30, after the dual magnetic circuit bone conduction vibrator is powered on, the magnetic induction lines in the annular magnetic gap 100 are greatly increased through the magnetic conduction action of the inner washer 31 and the annular outer washer 21, the dual magnetic circuit function is realized in the annular magnetic gap 100, the magnetic field force inside the dual magnetic circuit bone conduction vibrator is increased, the acting force received by the voice coil 40 in the annular magnetic gap 100 is increased, the sensitivity and the amplitude of the voice coil 40 are improved, and thus the transmission effect of the dual magnetic circuit bone conduction vibrator is improved; the antimagnetic cover 160 and the bottom plate 150 have the function of magnetic leakage prevention, so that the annular magnet and the inner magnet 30 are separated from the outside, and the influence of the internal magnetic circuit of the double-magnetic-circuit bone conduction vibrator on other spare parts is reduced.

Further, the bottom plate 150 and the magnetism prevention cover 160 are integrally formed.

Further, a pad is disposed on the conductive damper 50.

Further, as shown in fig. 11, a first through hole 32 is formed in the inner washer 31, a second through hole 33 penetrating through the inner magnet 30 is formed in the top of the inner magnet 30, a third through hole 15 is formed in the bottom of the bottom plate 150, and the first through hole 32, the second through hole 33 and the third through hole 15 are sequentially communicated; the first through hole 32, the second through hole 33 and the third through hole 15 are arranged, so that the inside of the double-magnetic-circuit bone conduction vibrator is radiated, and the temperature inside the double-magnetic-circuit bone conduction vibrator is reduced when the double-magnetic-circuit bone conduction vibrator works; and secondly, improving the low-frequency effect and reducing distortion, and reducing the situation that the voice coil 40 and the conducting piece 60 are deviated due to the fact that air flow generated by the vibration of the voice coil 40 and the conducting piece 60 of the double-magnetic-circuit bone conduction vibrator reaches the outside through the first through hole 32, the second through hole 33 and the third through hole 15.

Further, as shown in fig. 11, the tuning net 110 is attached to an outer side wall of the base plate 150 and covers the third through hole 15; the tuning net 110 is additionally arranged so that the tone quality effect of the double-magnetic-circuit bone conduction vibrator is improved, meanwhile, the third through hole 15 is sealed, the sound production effect of the double-magnetic-circuit bone conduction vibrator is reduced due to the fact that external dust particles enter the double-magnetic-circuit bone conduction vibrator through the third through hole 15, and the stability of the double-magnetic-circuit bone conduction vibrator is improved.

Further, as shown in fig. 11, the dual magnetic circuit bone conduction vibrator further includes a flexible wire 120; the flexible circuit 120 is electrically connected with the conductive damper 50 and sequentially passes through the first through hole 32, the second through hole 33 and the third through hole 15; the mode that the voice coil lead and an external power supply are electrified in the prior art is replaced, the production process is simplified, the production cost is reduced, the sound loss condition of the double-magnetic-circuit bone conduction vibrator is reduced, the stability is improved, the quality of the double-magnetic-circuit bone conduction vibrator is improved, and the service life is prolonged.

Example four

In the embodiment, a bone conduction listening device is provided, wherein the bone conduction listening device comprises the above-mentioned dual-magnetic circuit bone conduction vibrator; the bone conduction listening device can be a bone conduction hearing aid, a bone conduction intelligent glasses, a bone conduction intelligent helmet or a dual-magnetic circuit bone conduction vibrator, the bone conduction listening device uses the dual-magnetic circuit bone conduction vibrator in the embodiment, and due to the adoption of the dual-magnetic circuit bone conduction vibrator, the use of a voice coil lead is avoided, and the dual-magnetic circuit bone conduction vibrator is prevented from losing sound caused by the breakage of the voice coil lead; meanwhile, a dual magnetic field is generated after the power is turned on, so that the acting force of the voice coil 40 after the power is turned on in the annular magnetic gap 100 is increased, the vibration effect is enhanced, and the transmission effect of the conductive sheet 60 is improved.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (12)

1. A double-magnetic-circuit bone conduction vibrator is characterized by comprising a U iron, an annular outer magnet, an inner magnet, a voice coil, a conductive elastic wave and a conductive sheet; a groove with an opening is formed in the U iron, the conductive elastic wave is connected to the U iron, the voice coil is connected to the conductive elastic wave and electrically connected with the conductive elastic wave, and the conducting piece is connected with the voice coil and located outside the groove;

the inner magnet is arranged in the groove, an inner washer is arranged at the top of the inner magnet, the annular outer magnet is sleeved on the inner magnet, an annular outer washer is arranged at the top of the annular outer magnet, an annular magnetic gap is formed between the inner side wall of the annular outer washer and the outer side wall of the inner washer, and one end of the voice coil extends into the annular magnetic gap.

2. The dual magnetic circuit bone conduction vibrator according to claim 1, wherein the U-iron includes a small diameter cylinder, a large diameter cylinder, and a connection ring connected between the small diameter cylinder and the large diameter cylinder, the conductive spider being connected to an open end of the large diameter cylinder.

3. The dual magnetic circuit bone conduction vibrator of claim 1, wherein the dual magnetic circuit bone conduction vibrator further comprises a bracket; the support is connected to the U-shaped iron, and the conductive elastic wave is connected to the support.

4. The dual magnetic circuit bone conduction vibrator of claim 3, wherein the dual magnetic circuit bone conduction vibrator further comprises a first spring plate; one end of the first elastic sheet is connected to the outer side wall of the U-shaped iron, and the other end of the first elastic sheet is connected to the support.

5. The dual magnetic circuit bone conduction vibrator of claim 1, wherein the dual magnetic circuit bone conduction vibrator further comprises a second spring plate; the second elastic sheet is connected with the voice coil and is positioned between the conductive elastic wave and the conductive sheet.

6. The dual-magnetic circuit bone conduction vibrator according to claim 1, wherein the inner washer is provided with a first through hole, the top of the inner magnet is provided with a second through hole penetrating through the inner magnet, the bottom of the U-shaped iron is provided with a third through hole, and the first through hole, the second through hole and the third through hole are sequentially communicated.

7. The dual magnetic circuit bone conduction vibrator according to claim 6, wherein the dual magnetic circuit bone conduction vibrator further comprises a tuning net; and the tuning net is connected to the outer side wall of the U-shaped iron and covers the third through hole.

8. The dual magnetic circuit bone conduction vibrator of claim 6, wherein the dual magnetic circuit bone conduction vibrator further comprises a flexible wire; the flexible circuit is electrically connected with the voice coil and sequentially penetrates through the first through hole, the second through hole and the third through hole.

9. The dual magnetic circuit bone conduction vibrator according to any one of claims 1-8, wherein the conductive elastic wave comprises an outer ring, an inner ring and a plurality of connecting portions uniformly connected between the outer ring and the inner ring, and each of the outer ring and the inner ring is provided with at least one welding point for electrical connection.

10. The dual magnetic circuit bone conduction vibrator according to any one of claims 1-8, wherein the dual magnetic circuit bone conduction vibrator further comprises a connector and a circuit board; the connecting piece with electrically conductive bullet ripples is connected and both ends extend to respectively electrically conductive bullet ripples's relative both sides, the conduction piece is located outside the recess and with the connecting piece is connected, the circuit board is located within the recess and with the connecting piece is connected, the circuit board with voice coil loudspeaker voice coil fixed connection, just the circuit board with electrically conductive bullet ripples with the voice coil loudspeaker voice coil electricity is connected.

11. A double-magnetic-circuit bone conduction vibrator is characterized by comprising a U iron, an annular outer magnet, an inner magnet, a voice coil, a conductive elastic wave, a second elastic piece, a connecting piece and a conduction piece; a groove with an opening is formed in the U iron, the second elastic sheet is connected to the U iron, the connecting piece is connected with the second elastic sheet, two ends of the connecting piece extend to two opposite sides of the second elastic sheet respectively, the voice coil is connected with the connecting piece and located in the groove, the conducting piece is connected with the connecting piece and located outside the groove, the conducting elastic wave is connected with the connecting piece and located between the conducting piece and the second elastic sheet, and the conducting elastic wave is electrically connected with the voice coil;

the inner magnet is arranged in the groove, an inner washer is arranged at the top of the inner magnet, the annular outer magnet is sleeved on the inner magnet, an annular outer washer is arranged at the top of the annular outer magnet, an annular magnetic gap is formed between the inner side wall of the annular outer washer and the outer side wall of the inner washer, and one end of the voice coil extends into the annular magnetic gap.

12. A double-magnetic-circuit bone conduction vibrator is characterized by comprising an annular outer magnet, an inner magnet, a voice coil, a conductive elastic wave, a conductive sheet, a bottom plate and an antimagnetic cover, wherein the bottom plate and the antimagnetic cover are respectively used for preventing magnetic leakage; the antimagnetic shield is connected to the bottom plate, an accommodating space is arranged in the antimagnetic shield, the conductive elastic wave is connected to the antimagnetic shield, the voice coil is connected to the conductive elastic wave and electrically connected with the conductive elastic wave, and the conducting piece is connected with the voice coil and located outside the accommodating space;

the inner magnet is arranged in the accommodating space, an inner washer is arranged at the top of the inner magnet, the annular outer magnet is sleeved on the inner magnet, an annular outer washer is arranged at the top of the annular outer magnet, an annular magnetic gap is formed between the inner side wall of the annular outer washer and the outer side wall of the inner washer, and one end of the voice coil extends into the annular magnetic gap.

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