CN115633296B - Loudspeaker and magnetic circuit structure thereof - Google Patents
Loudspeaker and magnetic circuit structure thereof Download PDFInfo
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- CN115633296B CN115633296B CN202211661766.5A CN202211661766A CN115633296B CN 115633296 B CN115633296 B CN 115633296B CN 202211661766 A CN202211661766 A CN 202211661766A CN 115633296 B CN115633296 B CN 115633296B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
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- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The application provides a speaker and magnetic circuit structure thereof, the magnetic circuit structure of speaker includes relative first basin frame and second basin frame, and the centre magnet steel of centre gripping fixing between first basin frame and second basin frame, first basin frame and second basin frame symmetry set up the both sides at centre magnet steel, and all have the annular frame, central pole piece and connect at the annular frame and connect the pole piece, wherein the connection pole piece of first basin frame and second basin frame all includes the first end of being connected with respective central pole piece again, with the second end of various annular frame connecting wire and connect the locating segment between corresponding first end and second end, this locating segment can carry on spacingly to centre magnet steel respectively in first direction and second direction. The application provides a magnetic circuit structure fixes central magnet steel centre gripping through upper and lower two basin framves, and central magnet steel is not unsettled in magnetic circuit structure, and whole magnetic circuit structure occupation space is little, is favorable to the miniaturized development of speaker and improves the acoustic performance of speaker.
Description
Technical Field
The application relates to the technical field of electroacoustic conversion, in particular to a loudspeaker and a magnetic circuit structure thereof.
Background
A speaker is an important acoustic component of a portable electronic device, is used for converting an electric signal and a sound signal, and is an energy conversion device. With the development of intelligent consumer electronics, more and more complete machine manufacturers use dual-sided dual-drive sound speakers in order to achieve better sound effects.
The existing double-sided and double-drive sound production loudspeaker is mainly realized by overlapping and combining two sound production monomers in a back-to-back manner, namely, magnetic shields of the two sound production monomers are attached together. The two-sided sound production system of the existing double-sided double-drive loudspeaker structure is asymmetric, two sides of the loudspeaker structure are provided with two different magnetic gaps, the performance is lower, the occupied space is large, the requirement of small size is met by reducing the thickness of magnetic steel, and the acoustic performance of devices is limited.
Disclosure of Invention
In order to solve the existing problems, the present application provides a speaker and a magnetic circuit structure thereof, which realize high performance and miniaturization of size.
According to a first aspect of the embodiments of the present application, a magnetic circuit structure of a speaker is provided, which includes a first frame, a second frame, and a central magnetic steel clamped and fixed between the first frame and the second frame;
the first basin frame and the second basin frame are symmetrically arranged relative to the central magnetic steel, the first basin frame and the second basin frame respectively comprise an annular frame, a central pole piece positioned in the center of the annular frame and a connecting pole piece connected between the annular frame and the central pole piece, and the connecting pole piece comprises a first connecting end connected with the central pole piece, a second connecting end connected with the annular frame and a positioning section positioned between the first connecting end and the second connecting end;
the center magnetic steel clamping is arranged between the center pole pieces of the first basin frame and the second basin frame, the positioning section of the first basin frame bends and extends towards the direction of the second basin frame, the positioning section of the second basin frame bends and extends towards the direction of the first basin frame, the center pole piece is opposite to the center magnetic steel, the first direction is limited, and the second direction is limited.
In some embodiments, the upper surface and the lower surface of the central magnetic steel are respectively connected with the surfaces of the central pole pieces of the first frame and the second frame through bonding.
In some embodiments, the positioning section includes a first bending portion extending from the first connection end, a second bending portion extending from the second connection end, and a straight portion connected between the first bending portion and the second bending portion.
In some embodiments, the sum of the bending depths of the positioning sections of the first frame and the second frame is equal to the thickness of the central magnetic steel, and the straight portions of the two positioning sections are connected by welding.
In some embodiments, the connecting pole pieces of the first and second frames each include two symmetrically disposed at both ends of the central pole piece;
the side face of the central magnetic steel, which is opposite to the two ends of the central pole piece, is provided with the positioning groove for accommodating the first bending part corresponding to the connecting pole piece respectively.
In some embodiments, a magnetic gap for a voice coil to be installed therein is formed between the outer periphery of the central pole piece and the inner side of the annular frame, an opening is formed at a position of the central pole piece corresponding to the positioning groove, the first bent portion is located in the opening, and a bending surface of the first bent portion is flush with the outer periphery of the central pole piece on two sides of the opening or is closer to the bottom of the opening relative to the outer periphery.
In some embodiments, the annular frame includes edge magnetic steel located at the periphery of the central magnetic steel, the first frame and the second frame each further include an edge piece for placing the edge magnetic steel, and the edge magnetic steel is clamped and fixed between the edge pieces of the first frame and the second frame.
According to a first aspect of embodiments of the present application, there is provided a loudspeaker comprising a magnetic circuit structure as described in any one of the above.
In some embodiments, the speaker further comprises a first vibrating structure and a second vibrating structure, the first vibrating structure and the second vibrating structure being symmetric with respect to the magnetic circuit structure.
In some embodiments, the first and second vibrating structures include a voice coil on the central pole piece of the first frame, a diaphragm on the voice coil, and a dome on the diaphragm, respectively.
It is from top to bottom visible in speaker and magnetic circuit structure that this application provided, the magnetic circuit structure of speaker includes relative first basin frame and second basin frame, and the centre magnet steel of centre gripping between first basin frame and second basin frame is fixed, first basin frame and second basin frame symmetry set up the both sides at centre magnet steel, and all have the annular frame, central pole piece and connect at the annular frame and connect the pole piece, wherein the connection pole piece of first basin frame and second basin frame all includes the first end of being connected with respective central pole piece again, hold and connect the locating section between corresponding first end and second end with the second of various annular frame connecting wire, this locating section can carry on spacingly to centre magnet steel respectively in first direction and second direction. The application provides a magnetic circuit structure fixes central magnet steel centre gripping through upper and lower two basin framves, and central magnet steel is not unsettled in magnetic circuit structure, and whole magnetic circuit structure occupation space is little, is favorable to the miniaturized development of speaker and improves the acoustic performance of speaker.
Drawings
Fig. 1 is a cross-sectional view of a magnetic circuit structure applied to a speaker according to some embodiments of the present application;
fig. 2 is a schematic diagram of a central magnetic steel structure of a magnetic circuit structure according to an embodiment of the present application;
fig. 3 is a schematic top view of a magnetic circuit structure according to an embodiment of the present application;
fig. 4 is an enlarged layout schematic diagram of a magnetic circuit structure provided according to an embodiment of the present application;
fig. 5 is a schematic diagram of an explosion structure of a speaker according to an embodiment of the present application;
FIG. 6 is a schematic top view of a magnetic circuit structure with voice coils disposed on the top and bottom surfaces thereof;
fig. 7 is a schematic cross-sectional view of the magnetic circuit structure with voice coils disposed on both upper and lower surfaces thereof.
The reference signs are:
21-a first frame, 221-a central magnetic steel, 23-a second frame, 11-a first voice coil, 12-a first diaphragm, 13-a first spherical top, 31-a second voice coil, 32-a second diaphragm, 33-a second spherical top, 211-a first annular frame, 212-a first central pole piece, 213-a first connection pole piece, 2131-a first bending part a, 2132-a straight part a, 2133-a second bending part a, 231-a second annular frame, 232-a second central pole piece, 233-a second connection pole piece, 2331-a first bending part b, 2332-a straight part b, 2333-a second bending part b, 2341-a side pole piece, 2342-a side pole piece b, 2211-a positioning slot.
Detailed Description
The technical solution of the present application is further described in detail with reference to the drawings and specific embodiments of the specification.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of implementations of the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the following description, reference is made to the expression "some embodiments" which describe a subset of all possible embodiments, but it should be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.
It will also be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Fig. 1 is a schematic cross-sectional view of a magnetic circuit structure applied to a speaker according to some embodiments of the present application. In the present embodiment, the magnetic structure includes the first frame 21, the second frame 23, and the central magnetic steel 221 clamped and fixed between the first frame 21 and the second frame 23.
The first basin frame 21 and the second basin frame 23 are symmetrically arranged relative to the central magnetic steel 221, the first basin frame 21 and the second basin frame 23 respectively comprise an annular frame, a central pole piece located in the center of the annular frame and a connecting pole piece connected between the annular frame and the central pole piece, and the connecting pole piece comprises a first connecting end connected with the central pole piece, a second connecting end connected with the annular frame and a positioning section located between the first connecting end and the second connecting end. As shown in fig. 1, the first frame 21 includes a first annular frame 211, a first central pole piece 212 located at the center of the first annular frame 211, and a first connecting pole piece 213 connected between the first annular frame 211 and the first central pole piece 212, the number of the first connecting pole pieces 213 includes two or more, and the first connecting pole pieces 213 are symmetrically disposed at the periphery of the first central pole piece 212. The first connection pole piece 213 includes a first connection end (not labeled in fig. 1) connected to the first central pole piece 212, a second connection end (not labeled in fig. 1) connected to the first annular frame 211, and a first positioning section (not labeled in fig. 1) located between the first connection end and the second connection end thereof, the first positioning section being actually the remaining portion of the first connection pole piece 213 except for the first end and the second end thereof. As further shown in fig. 1, the second frame 23 includes a second annular frame 231, a second central pole piece 232 located at the center of the second annular frame 231, and a second connection pole piece 233 connected between the second annular frame 231 and the second central pole piece 232, the number of the second connection pole pieces 233 includes two or more, and the second connection pole pieces 233 are symmetrically disposed on the periphery of the second central pole piece 232. The second connection pole piece 233 includes a first connection end (not labeled in fig. 1) connected to the second central pole piece 232, a second connection end (not labeled in fig. 1) connected to the second annular frame 231, and a second positioning section (not labeled in fig. 1) located between the first connection end and the second connection end thereof, the second positioning section being actually the remaining portion of the second connection pole piece 233 except for the first end and the second end thereof.
The central magnetic steel 221 is clamped between the first central pole piece 212 of the first frame 21 and the second central pole piece 232 of the second frame 23, the first positioning section of the first frame 21 bends and extends towards the direction of the second frame 23, the second positioning section of the second frame 23 bends and extends towards the direction of the first frame 21, the first central pole piece 212 and the second central pole piece 232 limit the central magnetic steel 221 in a first direction, and the first positioning section and the second positioning section limit the central magnetic steel 221 in a second direction. The first direction is a direction in which the central magnetic steel 221 points to the corresponding positioning section, if the second direction in which the first positioning section forms the second direction limit for the central magnetic steel 221 is a direction to which the central magnetic steel 221 points to the first positioning section, if the second direction in which the second positioning section forms the second direction limit for the central magnetic steel 221 is a direction to which the central magnetic steel 221 points to the second positioning section. The first direction is a direction perpendicular to the second direction, and the first direction is also perpendicular to the stacking direction of the first frame 21, the central magnetic steel 221, and the second frame 23. In some embodiments, the stacking direction is a Z-axis direction, the second direction is an X-axis direction, and the first direction is a Y-axis direction.
From top to bottom, the magnetic circuit structure that this application embodiment provided, including relative first basin frame 21 and second basin frame 23 to and the centre magnet steel 221 between first basin frame 21 and second basin frame 23 is fixed to the centre of centre magnet steel, first basin frame 21 and second basin frame 23 symmetry set up in the both sides of centre magnet steel 221, and all have annular frame, central pole piece and connect the annular frame with the connection pole piece between the central pole piece, wherein the connection pole piece of first basin frame 21 and second basin frame 23 all includes the first end of being connected with respective central pole piece again, hold and connect the locating section between corresponding first end and second end with the second of various annular frame connecting wire, and this locating section can carry on spacingly to centre magnet steel 221 respectively in first direction and second direction, and this locating section can block the removal of centre magnet steel 221 in first direction and second direction promptly. Obviously, the magnetic circuit structure that this application embodiment provided is fixed central magnet steel centre gripping through two upper and lower basin framves, and central magnet steel is not unsettled in magnetic circuit structure, and whole magnetic circuit structure occupation space is little, is favorable to the miniaturized development of speaker. The upper surface and the lower surface of the central magnetic steel 221 are both adhered to the basin frame, so that the adhering area is large, the supporting performance on the central magnetic steel 221 is stronger, and the reliability of the magnetic circuit structure is improved. In addition, in this application embodiment, center magnet steel 221 directly supports on central pole piece, need not to adopt the magnetic shield to support, and magnetic structure is simple, and the equipment is convenient succinct, is favorable to improving the space utilization of speaker, is favorable to the miniaturization of speaker, and with the current speaker in the background art under having the same size, center magnet steel 221 among the magnetic structure that this application embodiment provided has bigger thickness in basin frame stacking direction, is favorable to improving the acoustic performance of speaker.
The positioning section and the central magnet steel 221 in the magnetic circuit structure provided by the embodiment of the application all form spacing in the first direction and with the first direction vertically second direction, namely the positioning section can block the movement of the central magnet steel 221 in the first direction and the second direction, and in the third direction in which the basin frames are stacked, the central magnet steel 221 is clamped by the central pole pieces of the upper and lower two basin frames. Therefore, the central magnetic steel 221 can be fixed between the upper and lower two frames. In other embodiments according to the present application, in order to further improve the stability of the central magnetic steel in the magnetic circuit structure, the size of the central magnetic steel 221 corresponds to the size of the central pole pieces of the upper and lower two frames (the first frame and the second frame), and if the lower surface of the central magnetic steel 221 is attached to the first surface of the first central pole piece 212 of the first frame 21, the lower surface of the central magnetic steel 221 corresponds to the first surface of the first central pole piece 212. Specifically, the lower surface of the central magnetic steel 221 is conformal to the first surface of the first central pole piece 212, and the lower surface of the central magnetic steel 221 is completely attached to the first surface of the first central pole piece 212. Similarly, the upper surface of the central magnetic steel 221 is attached to the first surface of the second central pole piece 232 of the second frame 23, and the upper surface of the central magnetic steel 221 corresponds to the first surface of the second central pole piece 232 in size. Specifically, the upper surface of the central magnetic steel 221 is conformal to the first surface of the second central pole piece 232, and the upper surface of the central magnetic steel 221 is completely attached to the first surface of the second central pole piece 232. Therefore, the upper surface and the lower surface of the central magnetic steel 221 are completely wrapped and supported by the corresponding central pole pieces, and then combined with the corresponding positioning sections, the central magnetic steel 221 is clamped and fixed by the first frame 21 and the second frame 23. The first frame 21 and the second frame 23 are symmetrically arranged about the central magnetic steel 221. The first positioning section of the first frame 21 protrudes relative to the first surface of the first central pole piece 212 to prevent the central magnetic steel 221 from moving in the first direction on the first surface of the first central pole piece 212, and the second positioning section of the second frame 23 protrudes relative to the first surface of the second central pole piece 232 to prevent the central magnetic steel 221 from moving in the first direction on the first surface of the second central pole piece 232.
In some embodiments, the upper and lower surfaces of the central magnetic steel 221 are connected to the surfaces of the central pole pieces of the first and second frames 21 and 23 by adhesion. Specifically, the lower surface of the central magnetic steel 221 is adhesively connected to the first surface of the first central pole piece 212 through an adhesive, and the upper surface of the central magnetic steel 221 is adhesively connected to the first surface of the second central pole piece 232 through an adhesive. The magnetic circuit structure provided by the embodiment can further improve the stability.
In some embodiments, the positioning sections of the first frame 21 and the second frame 23 each include a first bending portion extending from the first connecting end of the respective connecting pole piece, a second bending portion extending from the second connecting end of the respective connecting pole piece, and a straight portion connected between the first bending portion and the second bending portion. Specifically, as shown in fig. 1, the first positioning section of the first connecting pole piece 213 of the first frame 21 includes a first bending portion a2131, a second bending portion a2133, and a straight portion a2132 located between the first bending portion a2131 and the second bending portion a 2133; the second positioning section of the second connection pole piece 233 of the second frame 23 includes a first bending part b2331, a second bending part b2333, and a straight part b2332 located between the first bending part b2331 and the second bending part b 2333.
Further, in the magnetic circuit structure provided in the embodiment of the present application, the first bending portions of the first basin frame 21 and the second basin frame 23 each extend from the corresponding first connecting end to one end of the corresponding straight portion along the first extending direction, and the second bending portions of the first basin frame 21 and the second basin frame 23 each extend from the other end of the corresponding straight portion to the corresponding second connecting end along the second extending direction. The first extending direction is a direction from the corresponding central pole piece to the central magnetic steel 221, and the second extending direction is opposite to the first extending direction. Because the first location section of first basin frame 21 and the second location section of second basin frame 23 all include straight portion, first basin frame 21 and second basin frame 23 are with the straight portion of correspondence connection of laminating, are favorable to increasing the area of contact between first basin frame 21 and the second basin frame 23, can improve magnetic structure's stability.
Please refer to fig. 2, which is a schematic diagram of a central magnetic steel structure of a magnetic circuit structure according to an embodiment of the present application. In this embodiment, the side surface of the central magnetic steel 221 is provided with a positioning groove 2211 for accommodating the first bending portion of the first frame 21 and the second frame 23. Specifically, the number of the positioning slots 2211 at least includes two, and the two positioning slots are respectively located on the first side surface and the second side surface of the central magnetic steel 221. The first side surface and the second side surface of the central magnetic steel 221 are opposite, and the direction from the first side surface of the central magnetic steel 221 to the second side surface of the central magnetic steel 221 is parallel to the first direction. The number of the positioning slots 2211 of the central magnetic steel 221 is consistent with the number of the connecting pole pieces of the first frame 21 and the second frame 23. As shown in fig. 1, the number of the first connecting pole pieces 213 of the first frame 21 is 2, two first connecting pole pieces 213 are symmetrically disposed on two sides of the first central pole piece 212, and the two sides of the first central pole piece 212 correspond to the first side surface and the second side surface of the central magnetic steel 221, respectively; the number of the second connecting pole pieces 233 of the second frame 23 is 2, the two second connecting pole pieces 233 are respectively symmetrically arranged on two sides of the second central pole piece 232, and the two sides of the second central pole piece 232 correspond to the first side surface and the second side surface of the central magnetic steel 221 respectively.
The positioning groove 2211 of the central magnetic steel 221 penetrates through the upper surface and the lower surface of the central magnetic steel 221, that is, the length of the positioning groove 2211 is the distance between the upper surface and the lower surface of the central magnetic steel 221. The length of the positioning groove 2211 is the dimension in the third direction, the width of the positioning groove 2211 is the dimension in the second direction, and the depth of the positioning groove 2211 is the dimension in the first direction. The positioning slot 2211 is used to accommodate the first bending portion correspondingly connected to the pole piece, and the width of the positioning slot 2211 needs to be slightly larger than that of the corresponding first bending portion, so that the corresponding first bending portion can be embedded into the positioning slot 2211 when the magnetic circuit structure is assembled. The first bending part of each connection pole piece is accommodated in the corresponding positioning slot 2211 of the central magnetic steel 221, and the movement of the central magnetic steel 221 in the first direction and the second direction is obstructed by the corresponding positioning section, which is beneficial to improving the stability of the magnetic circuit structure. The positioning section of each basin frame occupies that the position is little among the magnetic structure that this application embodiment provided, and adopts the mode of the double-deck fixed center magnet steel of basin frame from top to bottom, is favorable to improving magnetic structure's steadiness intensity and clearance magnetic structure's occupation space.
With continuing reference to fig. 1 and 2, in some embodiments, the sum of the bending depths of the positioning sections of the first frame 21 and the second frame 23 is equal to the thickness of the central magnetic steel 221, and the straight portions of the two positioning sections are connected by welding. Specifically, the bending depth of the positioning segment is a dimension of the corresponding first bending portion in the third direction, and the thickness of the central magnetic steel 221 is a distance between the upper surface and the lower surface of the central magnetic steel 221. For example, the sum of the dimension of the first bent portion a2131 of the first frame 21 in the third direction and the dimension of the corresponding first bent portion b2331 of the second frame 23 in the third direction is equal to the length of the corresponding positioning slot 2211. First basin frame 21 and second basin frame 23 except respectively with two upper and lower surface bonding fixed of center magnet steel 221, its straight portion that corresponds passes through laser welding and connects for the steadiness intensity of the magnetic circuit structure that this application embodiment provided is higher, when receiving the continuation impact, first basin frame 21 and second basin frame 23 are difficult for breaking away. Therefore, the magnetic circuit structure that this application embodiment provided adopts laser welding and glue fixed mode, and bonding strength is high, and need not increase alone that the structure is spacing, and space utilization is high, can increase the magnetic circuit, improves the performance.
Fig. 3 is a schematic top view of a magnetic circuit structure according to an embodiment of the present application. Since the first frame 21 and the second frame 23 are symmetrical frames, in this embodiment, only the schematic plan view of the magnetic circuit structure corresponding to the magnetic circuit structure is taken as a schematic plan view from above the second frame, and the magnetic circuit structure provided in the embodiment of the present application is further described. As shown in fig. 3, in the present embodiment, a magnetic gap for installing a voice coil of a speaker is formed between an outer peripheral edge of the second center pole piece 232 of the second frame 23 and an inner side of the second annular frame 231, the second center pole piece 232 has an opening at a position corresponding to the positioning slot 2211 in fig. 2, the first bent portion b2331 is located in the corresponding opening, and a bending surface of the first bent portion b2331 is flush with an outer peripheral edge of the second center pole piece 232 at two sides of the corresponding opening or a bending surface of the first bent portion b2331 is closer to a bottom of the corresponding opening relative to the outer peripheral edge.
Please refer to fig. 4, which is an enlarged schematic diagram of a layout of a magnetic circuit structure according to an embodiment of the present application. Specifically, fig. 4 is a partially enlarged schematic view of a portion encircled by a dotted line in fig. 3. Referring to fig. 3 and 4, the width of the positioning slot 2211 of the central magnetic steel 221 in the second direction is w2, the width of the opening corresponding to the second central pole piece 232 in the second direction is w1, the width of the first bending portion b2331 in the second direction is w3, the width w1 is slightly greater than the width w2, and the width w2 is slightly greater than the width w3. The position of the positioning slot 2211 is located in the middle of the corresponding opening, and the position of the first bent portion b2331 is located in the middle of the corresponding positioning slot 2211. In the first direction, the depth of the positioning groove 2211 is h1, and the depth of the corresponding opening is h2, wherein the depth h1 is equal to the depth h2, or the depth h2 is slightly greater than the depth h1. The bending surface of the first bent portion B2331 is the surface a marked in fig. 4, and the distance from the surface a to the bottom C of the positioning slot 2211 is not more than the depth h1 of the positioning slot 2211, or the distance from the surface a to the bottom B of the opening is not more than the depth h2 of the opening. That is, the bent surface of the first bent portion B2331 is flush with the outer periphery of the second central pole piece 232 at two sides of the corresponding opening or the bent surface a of the first bent portion B2331 is closer to the bottom B of the corresponding opening than to the outer periphery. The outer peripheries of the two sides of the opening are the side surfaces of the corresponding central pole piece.
Obviously, in this embodiment, the positioning slots 2211 are disposed on two sides of the central magnetic steel 221 to accommodate the corresponding first bending portions, and the width of the positioning slot 2211 is slightly larger than the width of the corresponding first bending portion, so that when the magnetic circuit structure is assembled, the positioning slots 2211 can be used to cooperate with the corresponding first bending portions for positioning, so as to stabilize the central magnetic steel 221. In addition, when magnetic structure receives the impact, the bottom of constant head tank 2211 can also provide partial holding power for first basin frame 21 and second basin frame 23, places first basin frame 21 and second basin frame 23 and removes and cause central magnetic steel 221 to drop. Therefore, the magnetic circuit structure provided by the embodiment of the application does not need to additionally increase a limiting structure, and can be limited in the first direction and the second direction by the central magnetic steel with the positioning groove 2211 and the pot frame with the positioning section. Therefore, the magnetic circuit structure provided by the embodiment of the application is simple, low in manufacturing cost and strong in impact resistance.
In some embodiments, the first frame 21 and the second frame 23 provided by the embodiments of the present application are all metal frames. If the first frame 21 and the second frame 23 can be integrally formed by punching metal plates, namely, the annular frame, the central pole piece and the connecting pole piece of the first frame 21 and the second frame 23 are integrally formed. First basin frame 21 and second basin frame 23 adopt full metal construction or metal pole piece an organic whole to mould plastics or punching press and form, are favorable to improving magnetic structure's heat dispersion, high heat that the voice coil loudspeaker voice coil produced in can effectual reduction speaker. In addition, the first frame 21 and the second frame 23 made of all metal materials enable the magnetic circuit structure to have better high temperature resistance, and are beneficial to improving the heat resistance of the loudspeaker. In addition, in this embodiment, the annular frame, central pole piece integrated into one piece are first basin frame 21 and second basin frame 23, and when the magnetic circuit structure that this application provided was assembled, the material was few, and the equipment is simple, and the equipment error rate is low.
In some embodiments, the magnetic structure further includes side magnetic steels located around the central magnetic steel 221, where the number of the side magnetic steels may be one or multiple, and if the number of the side magnetic steels is multiple, the multiple side magnetic steels may be symmetrically disposed around the central magnetic steel 221. In addition, the edge magnetic steel is positioned between the first frame 21 and the second frame 23. Specifically, in this embodiment, the first frame 21 and the second frame 23 further include a side pole piece for placing a side magnetic steel, and the side magnetic steel is clamped and fixed between the side pole piece of the first frame 21 and the side pole piece of the second frame 23. Because the first frame 21 and the second frame 23 are symmetrical structures, only fig. 3 is taken as an illustration here, and the second frame 23 is further described, the structure of the first frame 21 is the same as that of the second frame 23, and is symmetrical about the central magnetic steel 221. As shown in fig. 3, the second frame 23 further includes a side pole piece a2341 and a side pole piece b2342 located at both sides of the second central pole piece 232. One side of each of the side pole piece a2341 and the side pole piece b2342 is bonded to one side of the corresponding side magnetic steel (not shown in fig. 3). In some embodiments, the positioning grooves may also be disposed on two sides of the edge magnetic steel, and the number of the connecting pole pieces of the first frame 21 and the second frame 23 corresponds to the number of the positioning grooves in the center magnetic steel 221 and the edge magnetic steel.
In some embodiments, the annular frame and the central pole piece of the basin frame of the magnetic circuit structure are integrated into a whole, so that the material is less, the assembly is simple, and the error rate is low. Adopt all metal to make each basin frame, the heat dissipation is good on the one hand, can effectively reduce the high heat that the voice coil loudspeaker voice coil produced in the speaker, and on the other hand temperature toleration is higher, can resist higher heat. In addition, adopt laser welding and glue fixed mode two fixed basin framves and central magnet steel from top to bottom, magnetic circuit structure's bonding strength is high, and it is spacing not need to increase the structure alone, and space utilization is high, can increase the magnetic circuit, improves the performance.
In addition, in some embodiments, the present application further provides a speaker including the magnetic circuit structure provided in any one of the embodiments of the present application. Specifically, the loudspeaker provided by the embodiment of the present application further includes a first vibration structure and a second vibration structure, and the first vibration structure and the second vibration structure are symmetrical with respect to the magnetic circuit structure. The magnetic circuit structure is used for providing magnetic driving force for the first vibration structure and the second vibration structure so as to drive the first vibration structure and the second vibration structure to sound. Therefore, in some embodiments, the speaker provided by the present application is a double-sided dual-drive sound speaker, wherein the first vibration structure and the second vibration structure respectively include a voice coil located on the central pole piece of the first frame, a diaphragm located on the voice coil, and a dome located on the diaphragm.
Fig. 5 is a schematic diagram of an explosion structure of a speaker according to an embodiment of the present application. In this embodiment, the first vibration structure includes a first voice coil 11 sleeved on the central pole piece of the first frame 21, a first diaphragm 12 located on a side of the first voice coil 11 away from the first frame 21, and a first dome 13 located on a side of the first diaphragm away from the first voice coil 11. The second vibration structure includes a second voice coil 31 fitted over the central pole piece of the second frame 23, a second diaphragm 32 located on a side of the second voice coil 31 away from the second frame 23, and a second dome 33 located on a side of the second diaphragm 32 away from the second voice coil 31.
Fig. 6 and 7 are combined, wherein fig. 6 is a schematic top view of a magnetic structure with voice coils disposed on both upper and lower surfaces, and fig. 7 is a schematic cross-sectional view of a magnetic structure with voice coils disposed on both upper and lower surfaces. The first central pole piece 212 of the first frame 21 is nested within the first voice coil 11, and a portion of the first voice coil 11 is located above the straight portion a2132 of the first frame 21 (the positional relationship of the first frame 21 to the first voice coil 11 is not fully illustrated and labeled in fig. 6 and 7). The second central pole piece 232 of the second basket 23 is nested within the second voice coil 31, and portions of the second voice coil 31 are located above the flat b2332 of the second basket 23. That is, a magnetic gap for accommodating the first and second voice coils 11 and 31 is formed between the annular frame and the central pole piece of the first and second frames 21 and 23. The embodiment of the application provides a speaker's two vibrating structure are symmetry completely, and use same magnetic gap, and occupation space is little, and space utilization is high, can adopt bigger magnet steel, and the performance is higher.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A magnetic circuit structure of a loudspeaker is characterized by comprising a first frame (21), a second frame (23) and central magnetic steel (221) clamped and fixed between the first frame (21) and the second frame (23);
the first frame (21) and the second frame (23) are symmetrically arranged relative to the central magnetic steel (221), the first frame (21) and the second frame (23) respectively comprise an annular frame, a central pole piece positioned in the center of the annular frame and a connecting pole piece connected between the annular frame and the central pole piece, and the connecting pole piece comprises a first connecting end connected with the central pole piece, a second connecting end connected with the annular frame and a positioning section positioned between the first connecting end and the second connecting end;
the central magnetic steel (221) is clamped between the central pole pieces of the first basin frame (21) and the second basin frame (23), the positioning section of the first basin frame (21) bends and extends towards the second basin frame (23), the positioning section of the second basin frame (23) bends and extends towards the first basin frame (21), the positioning section limits the central magnetic steel (221) in a first direction, the positioning section limits the central magnetic steel in a second direction, the first direction is the direction in which the central magnetic steel (221) points to the positioning section, the first direction is perpendicular to the second direction, and the first direction and the second direction are respectively perpendicular to the stacking direction of the first basin frame (21), the central magnetic steel (221) and the second basin frame (23);
the positioning sections of the first basin frame (21) and the second basin frame (23) respectively comprise a first bending part bent and extended from the first connecting end, a second bending part bent and extended from the second connecting end and a straight part connected between the first bending part and the second bending part;
a positioning groove (2211) for accommodating the first bending part of the first basin frame (21) and the first bending part of the second basin frame (23) is arranged on the side surface of the central magnetic steel (221);
the magnetic circuit structure further comprises edge magnetic steel positioned at the periphery of the central magnetic steel (221), the first basin frame (21) and the second basin frame (23) respectively further comprise edge pole pieces used for placing the edge magnetic steel, and the edge magnetic steel is clamped and fixed between the edge pole pieces of the first basin frame (21) and the edge pole pieces of the second basin frame (23);
the connecting pole pieces are connected to the inner sides of two opposite sides of the annular frame, and the edge pole pieces are connected to the inner sides of the other two opposite sides of the annular frame.
2. The magnetic structure according to claim 1, wherein the upper and lower surfaces of the central magnetic steel (221) are connected to the surfaces of the central pole pieces of the first frame (21) and the second frame (23) by adhesion.
3. The magnetic structure according to claim 1, wherein the sum of the bending depths of the positioning segments of the first frame (21) and the second frame (23) is equal to the thickness of the central magnetic steel (221), and the straight portions of the two positioning segments are connected by welding.
4. The magnetic structure according to claim 1, characterized in that the connecting pole pieces of the first and second frames (21, 23) respectively comprise two symmetrically arranged at the two ends of the central pole piece;
the side face of the central magnetic steel (221) opposite to the two ends of the central pole piece is provided with a positioning groove (2211) for accommodating the first bending part corresponding to the connecting pole piece respectively.
5. The magnetic circuit structure of claim 4, wherein a magnetic gap for a voice coil to be mounted therein is formed between the outer periphery of the central pole piece and the inner side of the annular frame, the central pole piece has an opening at a position corresponding to the positioning slot (2211), the first bent portion is located in the opening,
the bending surface of the first bending part is flush with the outer peripheries of the central pole piece on two sides of the opening, or the bending surface of the first bending part is closer to the bottom of the opening relative to the outer peripheries.
6. A loudspeaker comprising a magnetic circuit structure as claimed in any one of claims 1 to 5.
7. The loudspeaker of claim 6, further comprising a first vibrating structure and a second vibrating structure, the first vibrating structure and the second vibrating structure being symmetric about the magnetic circuit structure.
8. The loudspeaker of claim 7, wherein the first and second vibrating structures comprise a voice coil on the central pole piece of the first frame, a diaphragm on the voice coil, and a dome on the diaphragm, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211661766.5A CN115633296B (en) | 2022-12-23 | 2022-12-23 | Loudspeaker and magnetic circuit structure thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211661766.5A CN115633296B (en) | 2022-12-23 | 2022-12-23 | Loudspeaker and magnetic circuit structure thereof |
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| CN115633296A CN115633296A (en) | 2023-01-20 |
| CN115633296B true CN115633296B (en) | 2023-04-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008288636A (en) * | 2007-05-15 | 2008-11-27 | Citizen Electronics Co Ltd | Electro-acousto-mechanical transducer |
| CN203775398U (en) * | 2014-03-05 | 2014-08-13 | 瑞声光电科技(常州)有限公司 | Mini-type sounder |
| CN205793307U (en) * | 2016-05-31 | 2016-12-07 | 歌尔股份有限公司 | Speaker |
| CN214851804U (en) * | 2021-03-19 | 2021-11-23 | 益阳市信维声学科技有限公司 | Miniature loudspeaker with double-sided sounding function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101502379B1 (en) * | 2013-04-25 | 2015-03-16 | 주식회사 이엠텍 | Bonding structure of diaphragm for microspeaker and method for bonding diaphragms for microspeaker |
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2022
- 2022-12-23 CN CN202211661766.5A patent/CN115633296B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008288636A (en) * | 2007-05-15 | 2008-11-27 | Citizen Electronics Co Ltd | Electro-acousto-mechanical transducer |
| CN203775398U (en) * | 2014-03-05 | 2014-08-13 | 瑞声光电科技(常州)有限公司 | Mini-type sounder |
| CN205793307U (en) * | 2016-05-31 | 2016-12-07 | 歌尔股份有限公司 | Speaker |
| CN214851804U (en) * | 2021-03-19 | 2021-11-23 | 益阳市信维声学科技有限公司 | Miniature loudspeaker with double-sided sounding function |
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| CN115633296A (en) | 2023-01-20 |
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