Loudspeaker magnetic circuit assembly, loudspeaker, sound equipment and vehicle

Abstract

The utility model belongs to the technical field of loudspeaker accessories, and particularly relates to a loudspeaker magnetic circuit assembly, a loudspeaker, sound equipment and a vehicle. The loudspeaker magnetic circuit assembly comprises a first T iron, a first magnet, a second magnet, a magnetic conductive plate and a magnetic conductive piece, the first T iron comprises a first plate body and a first column body, and one end of the first column body is connected with the first plate body; the first magnet and the magnetic conductive plate are sleeved on the first column body; the magnetic conductive plate is laminated on the side surface, back to the first plate body, of the first magnet; the second magnet is arranged on the side, close to the magnetic conductive plate, of the first plate body, and the magnetic conductive piece is arranged on the side, back to the first plate body, of the second magnet; a magnetic gap is formed between the inner hole wall of the magnetic conducting plate and the outer wall of the magnetic conducting piece; the first projection of the magnetic conductive member on the preset projection plane and the second projection of the second magnet on the preset projection plane at least partially coincide, and the preset projection plane is perpendicular to the axis of the first cylinder. Under the magnetic conduction action of the magnetic conduction piece, the magnetic conduction plate and the first T iron, the magnetic induction lines are distributed more uniformly in the magnetic gaps.

Description

Technical Field

[0001] The utility model belongs to the technical field of loudspeaker accessories, and particularly relates to a loudspeaker magnetic circuit assembly, a loudspeaker, an audio device and a vehicle. Background Art

[0002] A loudspeaker is a component that converts an electrical signal into a sound signal. A loudspeaker generally includes a chassis, a diaphragm, a voice coil and a magnetic circuit assembly. The outer edge of the diaphragm is connected to the chassis, the magnetic circuit assembly is installed outside the chassis, one end of the voice coil is inserted into the magnetic gap of the magnetic circuit assembly, and the other end is connected to the diaphragm. After an alternating current signal is applied to the voice coil, the voice coil is affected by the magnetic field of the magnetic circuit assembly and makes a reciprocating motion in the magnetic gap to push the diaphragm to vibrate and generate sound.

[0003] The magnetic circuit assembly of the related technology includes a T-iron, a main magnet, a sub-magnet and a magnetic conductive plate. The T-iron has a bottom plate and a column body vertically extending from the middle position of the bottom plate. The main magnet and the magnetic conductive plate are sleeved outside the column body. The main magnet is laminated on the top surface of the bottom plate, the magnetic conductive plate is laminated on the top surface of the main magnet, and the sub-magnet is laminated on the top surface of the column body. A magnetic gap is formed between the outer wall of the column body and the magnetic conductive plate.

[0004] In the above magnetic circuit assembly, magnetic conduction is carried out through the T-iron and the magnetic conductive plate. However, the T-iron is located below the sub-magnet, and the magnetic conductive plate is sleeved outside the sub-magnet, so the magnetic conduction effect at the top of the sub-magnet is poor, resulting in uneven distribution of the magnetic induction lines generated by the first magnet and the second magnet in the magnetic gap, low magnetic induction intensity in the magnetic gap, small linear range of the magnetic circuit, and the loudspeaker is prone to total harmonic distortion during low-frequency vibration. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: aiming at the problem that the magnetic induction lines generated by the first magnet and the second magnet are unevenly distributed in the magnetic gap in the existing magnetic circuit assembly, a loudspeaker magnetic circuit assembly, a loudspeaker, an audio device and a vehicle are provided.

[0006] To solve the above technical problem, on the one hand, an embodiment of the utility model provides a loudspeaker magnetic circuit assembly, including a first T-iron, a first magnet, a second magnet, a magnetic conductive plate and a magnetic conductive member. The first T-iron includes a first plate body and a first column body, and one end of the first column body is connected to the first plate body; the first magnet and the magnetic conductive plate are both sleeved outside the first column body, and the magnetic conductive plate is laminated on the side of the first magnet facing away from the first plate body;

[0007] The second magnet is arranged on one side of the first plate body close to the magnetic conductive plate, and the magnetic conductive member is arranged on the side of the second magnet facing away from the first plate body; a magnetic gap for inserting the voice coil of the loudspeaker is formed between the inner hole wall of the magnetic conductive plate and the outer wall of the magnetic conductive member;

[0008] The first projection of the magnetic conduction member on the preset projection plane and at least a part of the second projection of the second magnet on the preset projection plane overlap; wherein, the preset projection plane is perpendicular to the axis of the first cylinder.

[0009] Optionally, the cross-sectional dimension of the magnetic conduction member is larger than the cross-sectional dimension of the second magnet, and a part of the first projection completely overlaps with the second projection.

[0010] Optionally, the second magnet is in a ring shape, the second magnet is sleeved outside the first cylinder and located inside the first magnet, and the inner hole wall of the second magnet fits the outer peripheral wall of the first cylinder.

[0011] Optionally, the length of the first cylinder along its axial direction is less than the length of the second magnet along its axial direction; the magnetic conduction member includes a second plate body and a second cylinder, one end of the second cylinder is connected to the second plate body, the second cylinder is inserted into the inner hole of the second magnet, the outer peripheral wall of the second cylinder fits the inner hole wall of the second magnet, and the second plate body is fixed on the end face of the second magnet.

[0012] Optionally, the end face of the second cylinder far from the second plate body contacts the end face of the first cylinder.

[0013] Optionally, the minimum width of the second plate body along the radial direction of the second cylinder is larger than the outer diameter of the second magnet.

[0014] Optionally, the second plate body is circular, and the diameter of the second plate body is larger than the outer diameter of the second magnet.

[0015] Optionally, the inner diameter of the magnetic conduction plate is less than the inner hole of the first magnet.

[0016] On the other hand, an embodiment of the present invention provides a loudspeaker, including a chassis, a voice coil, a diaphragm, and the above-mentioned loudspeaker magnetic circuit assembly. The outer edge of the diaphragm is fixed on the chassis, the side of the magnetic conduction plate facing away from the first plate body is fixed outside the chassis, one end of the voice coil is inserted into the magnetic gap, and the other end is connected to the middle of the diaphragm;

[0017] The voice coil is used to move back and forth in the magnetic gap after passing an alternating current signal, so as to drive the diaphragm to vibrate.

[0018] On the other hand, an embodiment of the present invention provides an audio device, including the above-mentioned loudspeaker.

[0019] On the other hand, an embodiment of the present invention provides a vehicle, including the above-mentioned loudspeaker or the above-mentioned audio device.

[0020] In the loudspeaker of the present utility model, since a magnetic conduction member is provided on the side of the second magnet facing away from the first plate body, and at least a part of the first projection of the magnetic conduction member on the preset projection plane coincides with the second projection of the second magnet on the preset projection plane, therefore, the magnetic conduction member can conduct magnetism for the first magnet and the second magnet on the side of the second magnet facing away from the first plate body. Under the combined magnetic conduction effect of the magnetic conduction member, the magnetic conduction plate and the first T-shaped iron, the magnetic induction intensity of the loudspeaker magnetic circuit assembly is greater, the magnetic induction lines generated by the first magnet and the second magnet are more evenly distributed in the magnetic gap, the linear range of the magnetic circuit of the loudspeaker magnetic circuit assembly is increased, and the total harmonic distortion of the loudspeaker during low-frequency vibration is reduced. Description of the Drawings

[0021] Figure 1 is an exploded view of a loudspeaker provided by an embodiment of the present utility model;

[0022] Figure 2 is Figure 1 the longitudinal sectional view of

[0023] Figure 3 is Figure 1 the structural schematic diagram of the first T-shaped iron in

[0024] Figure 4 is Figure 1 the structural schematic diagram of the magnetic conduction member in

[0025] Figure 5 is Figure 1 the distribution diagram of the magnetic induction lines generated by the loudspeaker magnetic circuit assembly in

[0026] The reference numerals in the specification are as follows:

[0027] 1. First T-shaped iron; 11. First plate body; 12. First column; 2. First magnet; 3. Second magnet; 4. Magnetic conduction member; 41. Second plate body; 42. Second column; 5. Magnetic conduction plate; 6. Speaker frame; 7. Voice coil; 8. Suspension; 9. Diaphragm; 10. Dust cap. Detailed Embodiments

[0028] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] As Figure 1 shown, an embodiment of the present utility model provides a loudspeaker, which includes a speaker frame 6, a voice coil 7, a diaphragm 9 and a loudspeaker magnetic circuit assembly. The loudspeaker magnetic circuit assembly includes a first T-shaped iron 1, a first magnet 2, a second magnet 3, a magnetic conduction plate 5 and a magnetic conduction member 4, as Figure 2 andFigure 3 As shown, the first T-iron 1 includes a first plate body 11 and a first column body 12, and one end of the first column body 12 is connected to the first plate body 11. The first magnet 2 and the magnetic conduction plate 5 are both sleeved outside the first column body 12, and the magnetic conduction plate 5 is laminated on the side of the first magnet 2 facing away from the first plate body 11.

[0030] As Figure 2 shown, the second magnet 3 is arranged on the side of the first plate body 11 close to the magnetic conduction plate 5, and the magnetic conduction member 4 is arranged on the side of the second magnet 3 facing away from the first plate body 11; a magnetic gap for inserting the voice coil 7 of the speaker is formed between the inner hole wall of the magnetic conduction plate 5 and the outer wall of the magnetic conduction member 4.

[0031] At least part of the first projection of the magnetic conduction member 4 on the preset projection plane coincides with the second projection of the second magnet 3 on the preset projection plane; wherein, the preset projection plane is perpendicular to the axis of the first column body 12.

[0032] The outer edge of the diaphragm 9 is fixed on the speaker frame 6, the plate surface of the magnetic conduction plate 5 facing away from the first plate body 11 is fixed outside the speaker frame 6, one end of the voice coil 7 is inserted into the magnetic gap, and the other end is connected to the middle of the diaphragm 9; the voice coil 7 is used for reciprocating in the magnetic gap when an alternating current signal is connected, so as to drive the diaphragm 9 to vibrate.

[0033] Specifically, when the voice coil 7 is connected to an alternating current signal, under the influence of the magnetic fields generated by the first magnet 2 and the second magnet 3, the voice coil 7 reciprocates in the magnetic gap formed by the magnetic conduction member 4 and the magnetic conduction plate 5 under the action of the Ampere force, thereby driving the diaphragm 9 to vibrate and generate sound.

[0034] Since the magnetic conduction member 4 is arranged on the side of the second magnet 3 facing away from the first plate body 11, and at least part of the first projection of the magnetic conduction member 4 on the preset projection plane coincides with the second projection of the second magnet 3 on the preset projection plane, therefore, the magnetic conduction member 4 can conduct magnetism for the first magnet 2 and the second magnet 3 on the side of the second magnet 3 facing away from the first plate body 11. Figure 5 Fig. is the magnetic induction line distribution diagram of the speaker magnetic circuit assembly. Under the combined magnetic conduction action of the magnetic conduction member 4, the magnetic conduction plate 5 and the first T-iron 1, the magnetic induction intensity of the speaker magnetic circuit assembly is greater, the magnetic induction lines generated by the first magnet 2 and the second magnet 3 are more uniformly distributed in the magnetic gap, the linear range of the magnetic circuit of the speaker magnetic circuit assembly is increased, and the total harmonic distortion of the speaker during low-frequency vibration is reduced.

[0035] In the loudspeaker of the present utility model, since a magnetic conduction member 4 is provided on the side of the second magnet 3 facing away from the first plate body 11, and at least part of the first projection of the magnetic conduction member 4 on the preset projection plane coincides with the second projection of the second magnet 3 on the preset projection plane, therefore, the magnetic conduction member 4 can conduct magnetism for the first magnet 2 and the second magnet 3 on the side of the second magnet 3 facing away from the first plate body 11. Under the combined magnetic conduction effect of the magnetic conduction member 4, the magnetic conduction plate 5 and the first T-iron 1, the magnetic induction intensity of the loudspeaker magnetic circuit assembly is greater, the magnetic induction lines generated by the first magnet 2 and the second magnet 3 are more evenly distributed in the magnetic gap, the linear range of the magnetic circuit of the loudspeaker magnetic circuit assembly is increased, and the total harmonic distortion of the loudspeaker during low-frequency vibration is reduced.

[0036] In one embodiment, one end of the voice coil 7 extending into the chassis 6 is connected with a dust cap 10.

[0037] In one embodiment, as Figure 2 shown, the cross-sectional dimension of the magnetic conduction member 4 is larger than the cross-sectional dimension of the second magnet 3, and part of the first projection completely coincides with the second projection, so as to increase the volume of the magnetic conduction member 4, improve the magnetic conduction effect of the magnetic conduction member 4 on the first magnet 2 and the second magnet 3, and further enhance the magnetic induction intensity of the loudspeaker magnetic circuit assembly. The so-called "cross section" refers to a section perpendicular to the axis of the first cylinder 12.

[0038] In one embodiment, the second magnet 3 is annular, the second magnet 3 is sleeved outside the first cylinder 12 and located inside the first magnet 2, and the inner hole wall of the second magnet 3 fits the outer peripheral wall of the first cylinder 12. Compared with the situation where the second magnet 3 needs to be installed on the first cylinder 12 with the help of a positioning jig when the second magnet 3 is in a disc shape, and the disc-shaped second magnet 3 is prone to deviation and causes improper installation, resulting in poor acoustics of the loudspeaker. When assembling the loudspeaker magnetic circuit assembly of the present utility model, the second magnet 3 can be positioned and installed by using the cooperation between its inner hole and the outer peripheral wall of the first cylinder 12, without the need for a mounting jig for installation and positioning, reducing the manufacturing cost, simplifying the process, reducing production defects, and reducing the scrap rate.

[0039] In one embodiment, as Figure 4 shown, the axial length of the first cylinder 12 is less than the axial length of the second magnet 3. The magnetic conduction member 4 includes a second plate body 41 and a second cylinder 42, and one end of the second cylinder 42 is connected to the second plate body 41. The second cylinder 42 is inserted into the inner hole of the second magnet 3, the outer peripheral wall of the second cylinder 42 fits the inner hole wall of the second magnet 3, and the second plate body 41 is fixed on the end face of the second magnet 3.

[0040] Compared with the pie-shaped magnetic conductive part 4 which needs to be positioned and installed with the aid of a positioning fixture, when assembling the speaker magnetic circuit assembly of the present utility model, the magnetic conductive part 4 can be directly positioned and installed by using the cooperation between the outer peripheral wall of the second cylinder 42 and the inner hole wall of the second magnet 3, reducing the manufacturing cost of the speaker, improving the production line production efficiency, reducing production defects, and reducing the scrap rate.

[0041] In one embodiment, the magnetic conductive part 4 is a second T-shaped iron.

[0042] In one embodiment, the end face of the second cylinder 42 far from the second plate body 41 contacts the end face of the first cylinder 12, making the magnetic conduction more sufficient.

[0043] In one embodiment, the second plate body 41 is adhesively bonded to the end face of the second magnet 3 facing away from the first plate body 11.

[0044] In one embodiment, the minimum width of the second plate body 41 along the radial direction of the second cylinder 42 is greater than the outer diameter of the second magnet 3, so that even when the second body is offset in the installation position, it can still cover the entire end face of the second magnet 3 facing away from the first body, which is beneficial to reducing the influence of the installation error of the magnetic conductive part 4 on the magnetic conduction effect. In addition, since the second body is usually adhesively bonded to the end face of the second magnet 3 facing away from the first plate body 11, when the minimum width of the second plate body 41 is greater than the outer diameter of the second magnet 3, even if there is glue overflow, the glue overflow position is hidden on the side of the magnetic conduction facing away from the voice coil 7, avoiding the glue overflow sticking to the voice coil 7 or the cured glue rubbing against the voice coil 7 reciprocating in the magnetic gap.

[0045] In one embodiment, the second plate body 41 is circular, and the diameter of the second plate body 41 is greater than the outer diameter of the second magnet 3. When the voice coil 7 is inserted into the magnetic gap, it is sleeved outside the second plate body 41. The outer periphery of the circular second body has no sharp edges, avoiding damage to the voice coil 7.

[0046] In one embodiment, the speaker further includes a spider 8. The spider 8 is sleeved on the voice coil 7, and the outer edge of the spider 8 is fixed on the chassis 6. The spider 8 is used to guide the voice coil 7, avoiding the voice coil 7 from being offset when reciprocating in the magnetic gap, thereby avoiding the generation of abnormal sound defects.

[0047] In one embodiment, the inner diameter of the magnetic conductive plate 5 is smaller than the inner hole of the first magnet 2, reducing the magnetic gap between the outer wall of the magnetic conductive part 4 and the inner hole wall of the magnetic conductive plate 5, and further increasing the driving force of the magnetic field on the voice coil 7.

[0048] In other embodiments, the cross-sectional size of the magnetic conductive part 4 can be smaller than the cross-sectional size of the second magnet 3, and a part of the first projection coincides with the second projection.

[0049] In other embodiments, the second magnet 3 may be disc-shaped and fixed to the end face of the first cylinder 12. At this time, the magnetic conduction member 4 may be directly fixed to the side face of the second magnet 3 facing away from the first plate body 11, and the magnetic conduction member 4 may be disc-shaped, annular or other irregular shapes.

[0050] In other embodiments, the length of the first cylinder 12 along its axial direction may be less than the length of the second magnet 3 along its axial direction, and the magnetic conduction member 4 is fixed to the side face of the second magnet 3 facing away from the first plate body 11. Of course, the end face of the first cylinder 12 and the end face of the second magnet 3 away from the first plate body 11 may be flush. At this time, the magnetic conduction member 4 may be disc-shaped and fixed to the end faces of the first cylinder 12 and the second magnet 3.

[0051] In other embodiments, there may be a distance between the end face of the second cylinder 42 away from the second body and the end face of the first cylinder 12.

[0052] In other embodiments, the minimum width of the second plate body 41 along the radial direction of the second cylinder 42 may be less than the outer diameter of the second magnet 3, so that a part of the first projection of the magnetic conduction member 4 coincides with the second projection of the second magnet 3.

[0053] In addition, an embodiment of the present invention provides a loudspeaker magnetic circuit assembly, whose structure is the same as that of the loudspeaker magnetic circuit assembly in the above embodiments, and will not be specifically described here.

[0054] In addition, an embodiment of the present invention provides an audio device. The audio device includes the loudspeaker in the above embodiment. The loudspeaker is an output device of the car audio system, and its function is to convert electrical signals into sound. The audio device also includes a sound source and a power amplifier. Common sound sources include radios, CDs, Bluetooth, USBs, etc. The radio can receive signals from radio stations, the CD player can play music discs, and the Bluetooth and USB interfaces can connect external devices such as mobile phones and MP3 players. The power amplifier is a power amplifier in the audio system, and its function is to enhance the signal of the sound source so that it has sufficient power to output to the loudspeaker to produce a higher volume and better sound quality.

[0055] In addition, an embodiment of the present invention provides a vehicle, including the audio device or the loudspeaker in the above embodiment.

[0056] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A loudspeaker magnetic circuit assembly, characterized in that: The invention comprises a first T-iron (1), a first magnet (2), a second magnet (3), a magnetic conductive plate (5) and a magnetic conductive member (4); the first T-iron (1) comprises a first plate (11) and a first column (12); one end of the first column (12) is connected to the first plate (11); the first magnet (2) and the magnetic conductive plate (5) are both sleeved outside the first column (12); the magnetic conductive plate (5) is stacked on the side of the first magnet (2) facing away from the first plate (11); The second magnet (3) is arranged on a side of the first plate (11) close to the magnetic conductive plate (5), and the magnetic conductive member (4) is arranged on a side of the second magnet (3) facing away from the first plate (11); a magnetic gap is formed between the inner hole wall of the magnetic conductive plate (5) and the outer wall of the magnetic conductive member (4) for inserting the voice coil (7) of the speaker; A first projection of the magnetic conductive member (4) on a preset projection plane and a second projection of the second magnet (3) on the preset projection plane at least partially overlap; wherein the preset projection plane is perpendicular to the axis of the first column (12).

2. The loudspeaker magnetic circuit assembly according to claim 1, characterized in that: The cross-sectional dimension of the magnetic conductive member (4) is greater than the cross-sectional dimension of the second magnet (3), and the first projection portion completely overlaps with the second projection portion.

3. The loudspeaker magnetic circuit assembly according to claim 1, characterized in that: The second magnet (3) is annular, and is sleeved outside the first column (12) and located inside the first magnet (2), and the inner hole wall of the second magnet (3) fits the outer peripheral wall of the first column (12).

4. The loudspeaker magnetic circuit assembly according to claim 3, characterized in that: The length of the first column (12) along its axial direction is smaller than the length of the second magnet (3) along its axial direction; the magnetic conductive component (4) comprises a second plate (41) and a second column (42); one end of the second column (42) is connected to the second plate (41); the second column (42) is inserted into the inner hole of the second magnet (3); the outer peripheral wall of the second column (42) is in contact with the inner hole wall of the second magnet (3); and the second plate (41) is fixed on the end face of the second magnet (3).

5. The loudspeaker magnetic circuit assembly according to claim 4, characterized in that: An end surface of the second column (42) away from the second plate (41) contacts an end surface of the first column (12).

6. The loudspeaker magnetic circuit assembly according to claim 4, characterized in that: The minimum width of the second plate (41) along the radial direction of the second column (42) is greater than the outer diameter of the second magnet (3).

7. The loudspeaker magnetic circuit assembly according to claim 6, characterized in that: The second plate body (41) is circular, and the diameter of the second plate body (41) is greater than the outer diameter of the second magnet (3).

8. The loudspeaker magnetic circuit assembly according to any one of claims 1 to 7, characterized in that: The inner diameter of the magnetic conductive plate (5) is smaller than the inner hole of the first magnet (2).

9. A loudspeaker, characterized in that: The loudspeaker comprises a basin frame (6), a voice coil (7), a diaphragm (9), and a loudspeaker magnetic circuit assembly as claimed in any one of claims 1 to 8, wherein the outer edge of the diaphragm (9) is fixed to the basin frame (6), the side of the magnetic conductive plate (5) facing away from the first plate body (11) is fixed outside the basin frame (6), one end of the voice coil (7) is inserted into the magnetic gap, and the other end is connected to the middle of the diaphragm (9); The voice coil (7) is used to move back and forth in the magnetic gap after an alternating current signal is passed through it, so as to drive the diaphragm (9) to vibrate.

10. An audio device, characterized in that: Comprising the speaker as claimed in claim 9.

11. A vehicle, characterized in that: Includes the speaker according to claim 9 or the audio device according to claim 10.

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