TWI455601B - Electro-acoustic transducer with reaction capability - Google Patents

Description

Inductive electroacoustic transducer

The invention relates to an electroacoustic transducer, in particular to a circuit board which uses an yoke of an electroacoustic transducer to communicate with a circuit board with an inductive function, and can form a shielding function for protecting the structure inside the electroacoustic transducer.

With the continuous advancement of technology, various electronic products are developing more rapidly. Among them, electroacoustic converters are important components of the sound output of electronic products, and with the lightness and thinness of electronic products, the requirements of electroacoustic converters are also Designed for miniaturization, high sound quality, low cost, etc., in order to meet the needs of the market.

As shown in the first figure, the conventional electroacoustic transducer 1 is combined with a circuit board 2 at one end, and its circuit design has only the positive/negative poles of the sound signal input, and the electrostatic protection effect cannot be achieved, so The operator designs another conventional electroacoustic transducer 3 as shown in the second figure, which is provided with a grounding terminal 5 on the upper cover 4, and the upper cover 4 and the grounding terminal 5 are made of metal material or conductive carbon or other electrical conductors, and Connect to the grounding wire of the phone's main board through the grounding terminal 5 to protect the ESD protection of the mobile phone circuit board.

However, although the above-mentioned electroacoustic transducer 3 has the function of electrostatic protection, the impedance of the grounding terminal 5 connected to the grounding wire is large, resulting in low sensing sensitivity, and the shielding effect is not good, and the grounding wire and the grounding terminal of the mobile phone mainboard 5 It is necessary to have proper connection position arrangement, otherwise it will cause trouble and inconvenience in assembly.

In view of the above problems, an object of the present invention is to provide an electroacoustic transducer having an inductive function, which uses an inductive pad of a circuit board to which a yoke is connected to form an on state and can be connected to an external device. It can be used to protect the structure inside the electroacoustic transducer and to have the sensing function.

Therefore, in order to achieve the above object, the present invention discloses an electroacoustic transducer with an induction function, which comprises a yoke, a magnetic circuit system is disposed in the yoke, a diaphragm is driven by the magnetic circuit system, and a cover is coupled to a yoke on one side and having a plurality of sound holes, a circuit board having a positive pole and a negative pole for inputting an acoustic electrical signal, the circuit board further having an inductive pad, the circuit board being coupled to the other side of the yoke, and The yoke has a portion that is connected and conductive to the inductive pad. Thereby, the sensing pad of the circuit board is soldered to a sensing line. When the sensing line is grounded, the electroacoustic converter can be grounded and electrostatically protected, and when the sensing line is connected with the signal receiving device, the electroacoustic conversion is performed. The device can be used as an antenna for frequency transmission and reception of broadcast, Bluetooth or network, and when the sensing line is connected to the capacitor, the electroacoustic converter can act as an induction pole of the capacitor.

In the embodiment of the present invention, the yoke has an integrally formed positioning post, and the sensing pad has a coupling hole combined with the positioning post to fix the circuit board to the yoke and is connected as a connection for connecting to the external device.

In another embodiment of the present invention, the inductive pad has a bonding hole, and the yoke has a positioning hole, and the circuit board is coupled to the side of the yoke through a metal pin to be connected as a connection for connection to an external device.

In still another embodiment of the present invention, the yoke has an auxiliary end that abuts against the sensing pad for clamping and fixing the circuit board to the yoke for conducting connection for connection to an external device.

Hereinafter, an embodiment of an electroacoustic transducer having an inductive function according to the present invention will be described with reference to the drawings.

Please refer to the third figure, which is an exploded view of the electroacoustic transducer with induction function of the present invention. The electroacoustic transducer 100 includes a yoke 10, a magnetic circuit system 20, a diaphragm 30, a cover 40, a circuit board 50, and a venting sheet 60.

The yoke 10 is in the shape of a basin for accommodating the magnetic circuit system 20 and the magnetic circuit system film 30, and a plurality of vent holes 11 are arranged around the periphery of the base 10 such that the space inside the basin communicates with the outside, and the vent hole 11 is provided on one side. There is an integrally formed positioning post 12 that is integrally formed with the yoke 10 and extends outward.

The magnetic circuit system 20 includes a magnet 21, a magnetic conductive sheet 22 and a voice coil 23. The magnet 21 is placed in one side of the yoke 10, the magnetic conductive sheet 22 is placed on the other side of the magnet 21, and the voice coil 23 is disposed on the magnet 21 and The circumference between the magnetic sheets 22.

The diaphragm 30 is coupled to one end of the voice coil 23 and is driven by the magnetic circuit system 20 to be interlocked.

The cover 40 is made of a metal material and is coupled to the yoke 10 for enclosing the magnetic circuit system 20 and the vibrating membrane 30 to the yoke 10, and the cover 40 is provided with a plurality of sound holes 41.

The circuit board 50 has a positive electrode 51, a negative electrode 52, and an inductive pad 53. The inductive pad 53 has a coupling hole 54. The circuit board 50 is fixed to the positioning post 12 of the yoke 10 by the bonding hole 54 to make the circuit board. 50 is firmly disposed at one side of the yoke 10, and the positive electrode 51 and the negative electrode 52 of the circuit board 50 are used to input a sound electric signal.

The ventilating sheet 60 is attached to one side of the yoke 10 on the same plane as the circuit board 50, and shields the vent holes 11 for adjusting the ventilation amount.

When the voice coil 23 is turned on by the current, the voice coil 23 and the magnetic field generated by the magnetic circuit system 20 vibrate by magnetic attraction or magnetic repulsion, thereby causing the diaphragm 30 to oscillate to push the surrounding air to generate sound, and The sound hole 41 makes a sound.

Referring to the fourth figure, it is a combination diagram of the electroacoustic transducer with sensing function of the present invention. The yoke 10 of the present invention is electrically connected to the circuit board 50 through the extended positioning post 12 or soldered, and the sensing line is soldered through the sensing pad 53 of the circuit board 50. When the sensing line is grounded, the electroacoustic transducer 100 can be grounded. And reaching the electrostatic protection effect, and when the sensing line is connected to the signal receiving device, the electroacoustic transducer 100 can be used as an antenna for performing frequency reception and reception of broadcasting, Bluetooth or network, and when the sensing line is When the capacitor is connected, the electroacoustic transducer can serve as the sensing pole of the capacitor. The invention can realize the sensing function of the reliable connection between the electroacoustic transducer 100 and the external device through a simple combined structure.

Referring to Figures 5 and 6, there is shown an exploded view and a combined view of a second embodiment of an electroacoustic transducer having an inductive function. In the present embodiment, the above-described ventilating sheet 60, magnetic circuit system 20 and diaphragm 30 are not disclosed for the sake of simplicity. This embodiment differs from the previous embodiment in that the cover 40 is convexly provided with a slightly inverted L-shaped end leg 42, and the yoke 10 has an auxiliary end leg 13 bent to a slightly inverted L shape to the periphery, and the yoke The iron 10 is provided with a notch 14 on the side of the auxiliary end leg 13 so that when the cover 40 is coupled to the yoke 10, the end leg 42 can pass through the notch 14 to abut the sensing pad 53 of the circuit board 50 on the yoke 10. The auxiliary pin 13 is also abutted on the sensing pad 53 to form the cover 40 and the yoke 10 simultaneously with the sensing pad 53 and can be soldered together to increase reliability, thereby achieving overall electrostatic shielding effectiveness. . In the present embodiment, the auxiliary end leg 13 can be cancelled as required, but the conduction effect of the cover 40, the yoke 10 and the circuit board 50 can be maintained after the cancellation.

Referring to Figures 7 and 8, there is shown an exploded view and a combination view of a third embodiment of the electroacoustic transducer having an inductive function. The difference between the embodiment and the foregoing embodiment is that the yoke 10 is provided with a positioning hole 15 and is inserted through a metal pin 70 to the positioning hole 15 of the circuit board 50 and the positioning hole 15 of the yoke 10 to connect the circuit. The plate 50 is fixed to the yoke 10, and the yoke 10 is formed to be electrically connected to the circuit board 50, and the yoke 10 can be connected to the outside through the induction wire.

Referring to the ninth and tenth drawings, there is shown an exploded view and a combined view of a fourth embodiment of the electroacoustic transducer having an inductive function. The embodiment is mainly different from the third embodiment in that the yoke 10 has an auxiliary leg 13 and the cover 40 has an end 42 for abutting against the sensing pad 53 of the circuit board 50 and being fixed by soldering. To increase reliability. In the present embodiment, if the pin 70 is made of a conductive material, the auxiliary end leg 13 can be eliminated, and the conduction effect of the cover 40, the yoke 10, and the circuit board 50 can be maintained.

Referring to Figures 11 and 12, there is shown an exploded view and a combined view of a fifth embodiment of an electroacoustic transducer having an inductive function. In the present embodiment, the auxiliary terminal 13 of the yoke 10 is mainly used to fix the circuit board 50, so that the circuit board 50 is clamped and fixed to one end of the yoke 10, and the auxiliary end 13 abuts against the circuit board 50. The sensing pad 53 is electrically connected to connect the yoke 10 to the outside through the sensing line.

Referring to Figures 13 and 14, there is shown an exploded view and a combination view of a sixth embodiment of an electroacoustic transducer having an inductive function. The difference between this embodiment and the fifth embodiment is that the cover 40 has an end 42 that abuts the auxiliary pad 13 of the yoke 10 and the auxiliary pad 13 of the yoke 10 abuts on the sensing pad 53 of the circuit board 50 and forms a conduction. In order to form the cover 40, the yoke 10 and the circuit board 50 are both electrically connected to form an overall shielding effect, so that the yoke 10 can pass through the sensing line to be connected to the outside.

In summary, the electroacoustic transducer with inductive function of the present invention is provided with a positioning post by a yoke, and the sensing pad has a coupling hole combined with the positioning post to fix the circuit board to the yoke or to induce The pad is provided with a coupling hole, the yoke is set with a hole, and the circuit board is coupled to the yoke side through the metal pin, or the auxiliary pin is provided on the yoke to directly abut the sensing pad for the circuit board. The clamping is fixed to the yoke, so that the circuit board can be fixed to the yoke, and the yoke is connected to the sensing pad of the circuit board, and the sensing pad is connected to the sensing line, and is connected to the external device. Grounding can make the electro-acoustic converter grounded and achieve electrostatic protection. When the sensing line is connected to the signal receiving device, the electro-acoustic converter can be used as an antenna for frequency connection such as broadcast, Bluetooth or network. The function is transmitted, and when the sensing line is connected to the capacitor, the electroacoustic transducer can act as an inductive pole of the capacitor.

In the foregoing embodiments of the present invention, the end pins and the auxiliary end pins may be respectively disposed on the cover or the yoke at the same time, as a stable circuit board on the yoke and the sensing pad connected to the circuit board to form electricity. The overall shielding effect of the acoustic transducer has the function of protecting internal components and specific sensing functions.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

Conventional component symbol

1. . . Electroacoustic converter

2. . . Circuit board

3. . . Electroacoustic converter

4. . . Upper cover

5. . . Ground terminal

Component symbol of the invention

100. . . Electroacoustic converter

10. . . Yoke

11. . . Vent

12. . . Positioning column

13. . . Auxiliary end

14. . . gap

15. . . Positioning hole

20. . . Magnetic circuit system

twenty one. . . magnet

twenty two. . . Magnetic guide

twenty three. . . Voice coil

30. . . Vibrating membrane

40. . . cover

41. . . Sound hole

42. . . Pin

50. . . Circuit board

51. . . positive electrode

52. . . negative electrode

53. . . Inductive pad

54. . . Bonding hole

60. . . Venting sheet

70. . . Metal pin

The first figure is a conventional electroacoustic transducer;

The second figure is another conventional electroacoustic transducer;

The third figure is an exploded view of the electroacoustic transducer with induction function of the present invention;

The fourth figure is a combination diagram of the electroacoustic transducer with sensing function of the present invention;

Figure 5 is an exploded view of a second embodiment of the electroacoustic transducer with sensing function of the present invention;

6 is a combination diagram of a second embodiment of an electroacoustic transducer having an inductive function according to the present invention;

7 is an exploded view of a third embodiment of an electroacoustic transducer having an inductive function according to the present invention;

Figure 8 is a combination diagram of a third embodiment of the electroacoustic transducer with sensing function of the present invention;

9 is an exploded view of a fourth embodiment of an electroacoustic transducer having an inductive function according to the present invention;

Figure 11 is a combination diagram of a fourth embodiment of an electroacoustic transducer having an inductive function according to the present invention;

11 is an exploded view of a fifth embodiment of an electroacoustic transducer having an inductive function according to the present invention;

Figure 12 is a combination diagram of a fifth embodiment of the electroacoustic transducer with sensing function of the present invention;

Figure 13 is an exploded view of a sixth embodiment of the electroacoustic transducer having an inductive function of the present invention;

Figure 14 is a combination diagram of a sixth embodiment of an electroacoustic transducer having an inductive function of the present invention.

100. . . Electroacoustic converter

10. . . Yoke

11. . . Vent

12. . . Positioning column

20. . . Magnetic circuit system

twenty one. . . magnet

twenty two. . . Magnetic guide

twenty three. . . Voice coil

30. . . Vibrating membrane

40. . . cover

41. . . Sound hole

50. . . Circuit board

51. . . positive electrode

52. . . negative electrode

53. . . Inductive pad

54. . . Bonding hole

60. . . Venting sheet

Claims (3)

An electroacoustic transducer with induction function includes: a yoke; a magnetic circuit system disposed in the yoke; a diaphragm driven by the magnetic circuit system; and a cover coupled to the a yoke on one side and having a plurality of sound holes; a circuit board having a positive pole and a negative pole for inputting an acoustic electrical signal, the circuit board further having an inductive pad, the circuit board being coupled to the yoke On the other side, the yoke has a portion connected to and electrically connected to the sensing pad; the yoke has an auxiliary end that abuts the sensing pad to form a conduction, and the circuit board is clamped and fixed . An electroacoustic transducer having an inductive function as described in claim 1, wherein the cover is made of a metal material and has one end leg for electrically connecting to the sensing pad. An electroacoustic transducer having an inductive function as described in claim 2, wherein a side of the auxiliary leg has a notch for the end to pass through.