Square plane horn with multiple magnetic circuits

Abstract

The utility model discloses a multi-magnetic-circuit square plane horn, which belongs to the technical field of horns and comprises an upper shell and a lower shell, the upper shell and the lower shell are connected through screws, a magnetic circuit structure composed of an outer magnet, an inner magnet and middle magnets is arranged on the inner side of the lower shell, the two middle magnets are arranged in the outer magnet, the inner magnet is arranged between the two middle magnets, and the inner magnet is arranged in the middle magnets. A washer is adhered to the bottom of the magnetic circuit structure, a voice coil is arranged above a gap between the outer magnet and the inner magnet, and a voice nozzle is arranged on the side end face of the lower shell. According to the utility model, the technical problems of low magnetic field efficiency utilization rate and low sensitivity of the existing square plane loudspeaker are solved. The magnetic circuit structure is composed of the outer magnet, the inner magnet and the middle magnet, the outer magnet is of a long-strip or annular structure, the inner magnet and the middle magnet are of a cuboid structure, the middle magnet is additionally arranged between the outer magnet and the inner magnet, the magnetic conduction efficiency of the outer magnet and the inner magnet can be improved, the magnetic field efficiency utilization rate can be improved by 30%, and the sensitivity is improved by more than 3db.

Description

TECHNICAL FIELD

[0001] The utility model relates to a loudspeaker technical field, concretely is a kind of multi-magnetic circuit square plane loudspeaker. BACKGROUND

[0002] Plane loudspeaker is the equipment for the place needing to save space and weight, since plane loudspeaker has the characteristics such as ultra-thin, small volume, light weight, not space occupation, so the use of plane loudspeaker is very extensive.

[0003] The magnetic circuit structure of existing square plane loudspeaker is composed of two magnets of inner magnet and outer magnet, this kind of mode leads to low magnetic field efficiency utilization rate, and the sensitivity of loudspeaker is relatively low. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of multi-magnetic circuit square plane loudspeaker, outer magnet, inner magnet and middle magnet constitute magnetic circuit structure, wherein, outer magnet is long strip or ring structure, inner magnet and middle magnet are cuboid structure, by increasing middle magnet between outer magnet and inner magnet, the magnetic conductivity efficiency of outer magnet and inner magnet can be increased, the magnetic field efficiency utilization rate can be improved by 30%, and the sensitivity is improved by more than 3db, the problems in the prior art can be solved.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of multi-magnetic circuit square plane loudspeaker, including upper shell and lower shell, the upper shell and lower shell are connected by screw, the inner side of the lower shell is provided with the magnetic circuit structure composed of outer magnet, inner magnet and middle magnet, the inside of outer magnet is provided with two middle magnets, inner magnet is arranged between the two middle magnets, the bottom of the magnetic circuit structure is glued with hua si, the upper side of the gap between outer magnet and inner magnet is provided with voice coil, the side end surface of the lower shell is provided with sound nozzle.

[0007] Preferably, the outer magnet, inner magnet and middle magnet are all neodymium-iron-boron permanent magnets.

[0008] Preferably, the outer magnet, inner magnet and middle magnet are all cuboid structure, the length of outer magnet, inner magnet and middle magnet is same, the height of outer magnet, inner magnet and middle magnet is same.

[0009] Preferably, the outer magnet is ring structure, and there is a gap between the end surface of inner magnet and middle magnet and the outer magnet.

[0010] Preferably, the outer magnet and inner magnet are opposite in magnetism, and both are Y-axis direction magnetism, and the middle magnet is X-axis direction magnetism.

[0011] Preferably, the voice coil is attached to the diaphragm, the diaphragm is arranged on the upper shell, the voice coil is flat annular shape, the thickness of the voice coil is 0.05-0.3mm, and the width of the voice coil is greater than 0.3mm.

[0012] Preferably, the other side end surface of the lower shell is provided with a PCB board.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The utility model discloses a square planar loudspeaker with a plurality of magnetic circuits, which comprises an upper shell, a lower shell, an outer magnet, an inner magnet and a middle magnet. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is an assembly view of the square planar loudspeaker with a plurality of magnetic circuits according to the utility model from a forward view angle.

[0016] Figure 2 It is an assembly view of the square planar loudspeaker with a plurality of magnetic circuits according to the utility model from a left view angle.

[0017] Figure 3 It is an exploded schematic view of the square planar loudspeaker with a cuboid outer magnet according to the utility model.

[0018] Figure 4 It is a sectional view of the square planar loudspeaker with a cuboid outer magnet according to the utility model.

[0019] Figure 5 It is a sectional view of the square planar loudspeaker with a ring-shaped outer magnet according to the utility model.

[0020] Figure 6 It is a sectional view of the square planar loudspeaker with a ring-shaped outer magnet according to the utility model.

[0021] In the drawings: 1, upper shell; 2, lower shell; 3, outer magnet; 4, inner magnet; 5, middle magnet; 6, voice coil; 7, diaphragm; 8, sound nozzle; 9, PCB board. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be apparently and completely described in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] In order to solve the technical problem that the magnetic circuit structure of the existing square planar loudspeaker is composed of two magnets of inner magnet and outer magnet, which leads to low magnetic field efficiency utilization rate and low sensitivity of the loudspeaker, the embodiment provides the following technical solutions:

[0024] Embodiment one: please refer toFigures 1-4 A multi-magnetic circuit square planar loudspeaker comprises an upper shell 1 and a lower shell 2, the upper shell 1 and the lower shell 2 are connected by screws, and the inner side of the lower shell 2 is provided with a magnetic circuit structure composed of an outer magnet 3, an inner magnet 4 and a middle magnet 5.

[0025] The outer magnet 3, the inner magnet 4 and the middle magnet 5 are all neodymium-iron-boron permanent magnets.

[0026] The outer magnet 3, the inner magnet 4 and the middle magnet 5 are all cuboid structures.

[0027] It should be noted that the inner magnet 4 is a cuboid structure, and the outer magnet 3 and the middle magnet 5 are both two cuboid structures.

[0028] The outer magnet 3 and the inner magnet 4 have opposite magnetism and are both Y-axis magnetism, and the middle magnet 5 has X-axis magnetism.

[0029] It should be noted that referring to Figure 4 , the upper end of the inner magnet 4 is an S pole, and the lower end is an N pole; the upper end of the outer magnet 3 of the two cuboid structures is an N pole, and the lower end is an S pole.

[0030] It should be noted that referring to Figure 4 , the middle magnet 5 of the two cuboid structures, the left end of the middle magnet 5 of one of the cuboid structures is an N pole, and the right end is an S pole; the left end of the middle magnet 5 of the other cuboid structure is an S pole, and the right end is an N pole.

[0031] Figure 4 The arrows in the figure indicate the direction of the magnetic poles, and the arc dotted line indicates the magnetic force line from N to S.

[0032] The bottom of the magnetic circuit structure is adhered with a mu-metal.

[0033] The mu-metal is made of SPCC or SPCE magnetic conductive material, the thickness of the mu-metal is 0.1-0.4mm, and the mu-metal is used to guide the magnetic field at the bottom of the outer magnet 3 and the inner magnet 4 to the upper side of the outer magnet 3 and the inner magnet 4, thereby increasing the efficiency of the voice coil 6 in the magnetic field.

[0034] The upper side of the gap between the outer magnet 3 and the inner magnet 4 is provided with a voice coil 6.

[0035] The voice coil 6 is a flat ring shape, the thickness of the voice coil 6 is 0.05-0.3mm, the width of the voice coil 6 is greater than 0.3mm, and the voice coil 6 is made of copper wire, copper-clad aluminum or aluminum wire material.

[0036] The voice coil 6 is adhered to a diaphragm 7, and the diaphragm 7 is arranged on the upper shell 1.

[0037] The upper and lower surfaces of the diaphragm 7 are both adhered with the voice coil 6, and a double-voice coil structure is formed, so that the number of loudspeaker coils is doubled, and the sensitivity can be improved by 3dB.

[0038] The diaphragm 7 is composed of a suspension edge with a folded ring and a flat ball top, the folded ring is made of one or more composite materials such as PU, TPEE or PEEK and PET, and the ball top is flat and made of a material with good rigidity.

[0039] The upper shell 1 is connected with the lower shell 2, the side end surface of the lower shell 2 is provided with a sound nozzle 8, and the other side end surface of the lower shell 2 is provided with a PCB board 9.

[0040] Embodiment two: the difference from embodiment one is that please refer to Figures 5-6 , the shape of the outer magnet 3 is different, and the outer magnet 3 is a ring structure.

[0041] It should be noted that the inner magnet 4 is a cuboid structure, the middle magnet 5 is two cuboid structures, and the outer magnet 3 is a ring structure.

[0042] It should be noted that please refer to Figure 6 , the upper end of the inner magnet 4 is S pole, and the lower end is N pole; the upper end of the ring structure of the outer magnet 3 is N pole, and the lower end is S pole.

[0043] It should be noted that please refer to Figure 6 , the left end of one of the two cuboid structures of the middle magnet 5 is N pole, and the right end is S pole; the left end of the other cuboid structure of the middle magnet 5 is S pole, and the right end is N pole.

[0044] Figure 6 The arrow in the figure indicates the direction of the magnetic pole, and the arc dotted line indicates the magnetic force line from N to S of the magnet.

[0045] In summary, the magnetic circuit structure is composed of the outer magnet 3, the inner magnet 4 and the middle magnet 5, wherein the outer magnet 3 is a long strip or a ring structure, the inner magnet 4 and the middle magnet 5 are cuboid structures, and by adding the middle magnet 5 between the outer magnet 3 and the inner magnet 4, the magnetic conductivity efficiency of the outer magnet 3 and the inner magnet 4 can be increased, and the magnetic field efficiency utilization rate can be improved by 30%, and the sensitivity can be improved by more than 3db.

[0046] It should be noted that in this article, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0047] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-magnetic circuit square planar horn comprising an upper shell (1) and a lower shell (2), characterized in that: The upper shell (1) and the lower shell (2) are connected by screws, the inner side of the lower shell (2) is provided with a magnetic circuit structure composed of an outer magnet (3), an inner magnet (4) and a middle magnet (5), the inner part of the outer magnet (3) is provided with two middle magnets (5), the inner magnet (4) is arranged between the two middle magnets (5), the bottom of the magnetic circuit structure is adhered with a Huasi, the gap between the outer magnet (3) and the inner magnet (4) is provided with a voice coil (6), and the side end face of the lower shell (2) is provided with a sound nozzle (8).

2. A multi-magnetic circuit square planar horn according to claim 1, characterized in that: The outer magnet (3), the inner magnet (4) and the middle magnet (5) are all neodymium-iron-boron permanent magnets.

3. A multi-magnetic circuit square planar horn according to claim 1, characterized in that: The outer magnet (3), the inner magnet (4) and the middle magnet (5) are all cuboid structures, the lengths of the outer magnet (3), the inner magnet (4) and the middle magnet (5) are the same, and the heights of the outer magnet (3), the inner magnet (4) and the middle magnet (5) are the same.

4. A multi-magnetic circuit square planar horn according to claim 1, characterized in that: The outer magnet (3) is a ring structure, and the end faces of the inner magnet (4) and the middle magnet (5) are spaced apart from the outer magnet (3).

5. A multi-magnetic circuit square planar horn according to claim 1, characterized in that: The outer magnet (3) and the inner magnet (4) have opposite magnetism and are both Y-axis direction magnetism, and the middle magnet (5) is X-axis direction magnetism.

6. A multi-magnetic circuit square planar horn according to claim 1, characterized in that: The voice coil (6) is adhered to a diaphragm (7), the diaphragm (7) is arranged on the upper shell (1), the voice coil (6) is a flat ring shape, the thickness of the voice coil (6) is 0.05-0.3mm, and the width of the voice coil (6) is greater than 0.3mm.

7. A multi-magnetic circuit square planar horn according to claim 1, characterized in that: The other side end face of the lower shell (2) is provided with a PCB board (9).

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