CN211321502U

CN211321502U - Double magnetic drive speaker unit

Info

Publication number: CN211321502U
Application number: CN202020158057.5U
Authority: CN
Inventors: 洪金水
Original assignee: Dong Minxiong
Current assignee: Dong Minxiong
Priority date: 2020-02-10
Filing date: 2020-02-10
Publication date: 2020-08-21
Anticipated expiration: 2030-02-10

Abstract

The utility model provides a speaker unit with dual magnetic drive, which includes a basin frame; a sound basin, a voice coil is arranged on the rear end surface of the basin frame; and a dual magnetic drive unit, which is combined with the rear end of the basin frame; in particular, the dual magnetic drive unit has a rear gasket; an external magnet, the rear end surface of which is attached to the rear gasket; an internal magnet, which is arranged in the external magnet, and the rear end surface of which is attached to the rear gasket, and the side surface of the internal magnet and the external magnet maintain a gap for accommodating the voice coil; and a front external gasket and a front internal gasket attached to the front of the external magnet and the internal magnet respectively. Thus, through the structure of the external magnet, the internal magnet, the front external gasket, the front internal gasket and the rear gasket, a stronger magnetic field can be generated, so as to achieve the purpose of increasing the output power of the unit, obtaining a larger decibel (dB), and reducing the size of the speaker unit.

Description

Double-magnetic-drive loudspeaker unit

Technical Field

The present invention relates to a speaker unit, and more particularly to a dual magnetic driven speaker unit using an outer magnet and an inner magnet to generate a stronger magnetic field to drive a voice coil.

Background

The speaker unit is also called as a loudspeaker, the basic working principle of the speaker unit is a device for converting an electric signal into a sound signal for playback, and the most widely used at present is an electrodynamic speaker unit which mainly comprises a basin frame, a voice basin, a voice coil and a permanent magnet, wherein the edge of the voice basin is combined with the basin frame, the rear end of the basin frame is combined with the permanent magnet, the rear end of the voice basin is combined with the voice coil, and the coil of the voice coil is adjacent to the constant magnetic field of the permanent magnet. When the voice coil of the electrodynamic loudspeaker monomer is connected with audio current, the voice coil generates an alternating magnetic field under the action of the current, and the permanent magnet also generates a constant magnetic field with unchanged size and direction. Because the size and the direction of the magnetic field generated by the voice coil are continuously changed along with the change of the audio current, the voice coil does the motion vertical to the current direction in the voice coil due to the interaction of the two magnetic fields, and the voice coil drives the vibrating diaphragm to vibrate due to the connection of the vibrating diaphragm of the voice coil, so that the vibrating surface of the air generates sound due to the vibration of the vibrating diaphragm.

However, in order to increase the sensitivity of the known speaker unit, the volume of the permanent magnet must be increased to achieve a certain output power, which is disadvantageous to reduce the volume of the speaker unit, and if the volume of the speaker unit is reduced, the permanent magnet which is relatively reduced cannot generate a strong magnetic field, i.e., the sensitivity and the output power of the speaker unit are reduced, which is disadvantageous to be applied to miniaturized electronic 3C products or earphones. Therefore, how to reduce the size of the speaker unit and to increase the sensitivity and output power thereof is the subject to be actively overcome by the present invention.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a dual magnetic drive's loudspeaker unit, its configuration through the outer magnet and the inner magnet of the dual magnetic drive unit of loudspeaker unit rear end to and the magnetism structure of sealing of preceding outer gasket, preceding inner gasket and back gasket, be used for driving free voice coil loudspeaker voice coil, sound basin, and then reach and improve monomer output, obtain bigger decibel (dB), and reduce efficiency such as loudspeaker unit.

To achieve the above and other objects, the present invention provides a dual magnetic driven speaker unit, which preferably comprises: a basin stand; a sound cone combined in the front of the frame, with a voice coil on the back end; and a double magnetic driving unit combined at the rear end of the basin stand, wherein the double magnetic driving unit is provided with a rear gasket; an outer magnet which is a ring magnet with a containing space in the middle, and the back end surface of the outer magnet is attached to the front surface of the back gasket; the inner magnet is a magnet arranged in the accommodating space, the rear end face of the inner magnet is attached to the front face of the rear gasket, a gap is kept between the side face of the inner magnet and the inner wall of the accommodating space, and the voice coil is accommodated in the gap; a front outer pad attached to the front of the outer magnet; and a front inner pad attached to the front of the inner magnet.

In an optional embodiment, in the above dual-magnetic-drive horn unit, the front end of the outer magnet is an N pole or an S pole; and the front end of the inner magnet is the same as the front end of the outer magnet in S pole or N pole.

In an alternative embodiment, in the above-mentioned dual-magnetic-drive horn unit, the front ends of the outer magnet and the inner magnet opposite to the rear end face thereof are both N poles or S poles.

In an optional embodiment, in the above-mentioned dual-magnetic-drive horn unit, the outer magnet is an oblong ring magnet, and the accommodating space is an oblong through hole; and the inner magnet is an oblong magnet.

In an alternative embodiment, in the above dual-magnet driven horn unit, the inner magnet is a solid magnet.

In an alternative embodiment, in the dual-magnetic-drive speaker unit, the cone is a cone-shaped diaphragm.

In an optional embodiment, in the dual-magnetic-drive speaker unit, the cone is a flat diaphragm.

The utility model discloses a two magnetic drive's loudspeaker monomer, the configuration of outer magnet and interior magnet through this two magnetic drive unit, and preceding outer gasket, preceding interior gasket constructs with the magnetism of sealing of back gasket, can make the clearance department between this outer magnet and the interior magnet produce stronger magnetic field (flux density), when being used for this voice coil loudspeaker voice coil circular telegram to produce the electromagnetic field, can make stronger magnetic field produce more sensitive vibration effect in electromagnetic field and this clearance, and then promote this sound basin, borrow this to reach and improve monomer output, obtain bigger decibel (dB), and reduce efficiency such as loudspeaker monomer.

Drawings

The features and advantages of the present invention are described in detail below with reference to the accompanying drawings:

fig. 1 is a perspective view of a first preferred embodiment of the speaker unit of the present invention.

Fig. 2 is a schematic cross-sectional view of a first preferred embodiment of the speaker unit of the present invention.

Fig. 3 is an exploded view of the speaker unit according to the first preferred embodiment of the present invention.

Fig. 4 is a perspective view of a second preferred embodiment of the speaker unit of the present invention.

Fig. 5 is a schematic cross-sectional view of a second preferred embodiment of the speaker unit of the present invention.

Fig. 6 is an exploded view of a second preferred embodiment of the speaker unit of the present invention.

Part name:

10, a basin stand; 20, a sound basin; 30 voice coils; 31 a cylinder; 32 coils; 40 dual magnetic drive units; 41 a rear pad; 42 external magnets; 421 an accommodating space; 43 an internal magnet; 44 a front outer pad; 45 front inner pad; 50 gaps.

Detailed Description

The present invention can be further implemented by referring to the following drawings and specific embodiments, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1, 2 and 3, a first preferred embodiment of the dual magnetic driving speaker unit of the present invention preferably includes: a basin stand 10 which is a hollow conical support with a large front end and a small rear end; a cone 20 which is a cone-shaped vibrating diaphragm with a large front end and a small rear end, the edge of which is combined with the front of the frame 10, and the rear end surface of which is provided with a voice coil 30; the voice coil 30 has a cylinder 31 connected to the back end of the cone diaphragm of the cone 20, and a coil 32 wound around the cylinder 31; and a pair of magnetic driving units 40 coupled to the rear end of the frame 10 for driving the voice coil 30 and the voice cone 20 to vibrate.

In particular, referring to fig. 2 and 3, the dual magnetic driving unit 40 of the present invention has a rear pad (or washer) 41; an outer magnet 42, which is a ring magnet having a receiving space 421 in the middle, and the rear end surface of which is attached to the front surface of the rear pad 41; an inner magnet 43, which is a solid magnet disposed in the accommodating space 421, and the rear end face of which is also attached to the front face of the rear spacer 41, and the side face of which maintains a gap 50 with the inner wall of the accommodating space 421, the gap 50 accommodating the voice coil 30; outer gasket 44 and a preceding inner gasket 45 before, this preceding outer gasket 44 is an annular lamellar body to the laminating is in the front of this outer magnet 42, and this preceding inner gasket 45 is a lamellar body, and the laminating is in the front of this inner magnet 43, borrows this structure the utility model discloses two magnetism driven loudspeaker monomer.

The outer magnet 42 and the inner magnet 43 are preferably a rare earth magnet, such as a rubidium iron boron magnet, which has a stronger magnetic field than known ferrite magnets. When the outer magnet 42 and the inner magnet 43 are disposed, the front ends of the outer magnet 42 and the inner magnet 43 opposite to the rear end surfaces thereof are made to be the same as the N pole or the S pole, and the front end of the inner magnet 43 is made to be the same as the S pole or the N pole as the front end of the outer magnet 42. The outer magnet 42 is preferably a ring magnet, the accommodating space 421 of the outer magnet 42 is a circular through hole, and the inner magnet 43 is a circular magnet matching the accommodating space 421. The rear spacer 41, the front outer spacer 44 and the front inner spacer 45 are made of iron pieces, and are coupled to the front and rear end surfaces of the outer magnet 42 and the inner magnet 43 in the above-described structure, thereby preventing the outer magnet 42 and the inner magnet 43 from leaking magnetic flux, and concentrating the magnetic field in the gap 50 through the front outer spacer 44 and the front inner spacer 45.

The utility model discloses a two magnetic drive's loudspeaker monomer, the configuration of outer magnet 42 and interior magnet 43 through this two magnetic drive unit 40 of the aforesaid, and preceding outer gasket 44, preceding interior gasket 45 and back gasket 41 seal the magnetism structure, can make 50 departments in the clearance between this outer magnet 42 and the interior magnet 43 produce stronger magnetic field (magnetic flux density), when being used for when this voice coil loudspeaker voice coil 30 circular telegram production electromagnetic field, can make stronger magnetic field produce more sensitive vibration effect in electromagnetic field and this clearance, and then promote this sound basin 20, borrow this to reach and improve monomer output, obtain bigger decibel (dB), and reduce efficiency such as loudspeaker monomer.

Referring to fig. 4, 5 and 6, a second preferred embodiment of the dual magnetic driving speaker unit of the present invention is embodied as a flat speaker unit, which also includes the aforementioned frame 10, cone 20, voice coil 30 and dual magnetic driving unit 40; the frame 10 is implemented as a flat frame, the cone 20 is implemented as a flat plate-shaped diaphragm, and the voice coil 30 is the same as the first preferred embodiment; the dual magnetic driving unit 40 is also configured with a rear pad 41, an outer magnet 42, an inner magnet 43, a front outer pad 44, and a front inner pad 45, especially the outer magnet 42 is implemented as an oblong ring magnet, the accommodating space 421 of the outer magnet 42 is an oblong through hole, and the inner magnet 43 is an oblong magnet; the front outer pad 44 and the front inner pad 45 are respectively implemented to correspond to the front end surfaces of the outer magnet 42 and the inner magnet 43; therefore, the utility model discloses two magnetic drive's loudspeaker monomer second preferred embodiments can reach the improvement monomer output that is the same with first embodiment, obtain bigger decibel (dB), and reduce efficiency such as loudspeaker monomer to be particularly suitable for using at electron 3C product, improve the not enough defect of known electron 3C product loudspeaker monomer output.

It should be noted that, in the present invention, aiming at the structural improvement of the dual magnetic driving unit 40, the dual magnetic driving unit 40 is not limited to the shapes of the basin frame and the sound basin in the first and second preferred embodiments, but can be changed into other shapes to apply the speaker unit of the present invention to the field of smaller speakers such as earphones.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. A dual magnetically actuated horn cell, comprising: a basin stand; a sound cone combined in the front of the frame, with a voice coil on the back end; and a pair of magnetic drive units, it combines the rear end at this basin frame, its characterized in that:

the dual magnetic driving unit has a back pad;

an outer magnet which is a ring magnet with a containing space in the middle, and the back end surface of the outer magnet is attached to the front surface of the back gasket;

the inner magnet is a magnet arranged in the accommodating space, the rear end face of the inner magnet is attached to the front face of the rear gasket, a gap is kept between the side face of the inner magnet and the inner wall of the accommodating space, and the voice coil is accommodated in the gap;

a front outer pad attached to the front of the outer magnet; and a front inner pad attached to the front of the inner magnet.

2. The dual magnetic driven horn unit of claim 1, wherein the front ends of the outer magnet and the inner magnet opposite to the rear end surfaces thereof are both N-pole or S-pole.

3. The dual magnetic driven horn unit of claim 2, wherein the external magnet is a ring magnet, and the receiving space is a circular through hole; and the inner magnet is a circular magnet.

4. The dual magnetic driven horn unit of claim 2, wherein the external magnet is an oblong ring magnet, and the receiving space is an oblong through hole; and the inner magnet is an oblong magnet.

5. A dual magnetically actuated horn cell as claimed in claim 3 or claim 4 wherein said inner magnet is a solid magnet.

6. The dual magnetically actuated horn cell of claim 1, wherein the cone is a cone diaphragm.

7. The dual magnetic drive horn cell of claim 1 wherein the cone is a flat plate diaphragm.