Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a magnetic circuit assembly, a diaphragm assembly, a centering disk and a bridging circuit board, the magnetic circuit assembly comprises a yoke, a peripheral edge magnetic steel, a middle edge magnetic steel, an edge washer and a plurality of groups of central magnetic structures, and the middle edge magnetic steel is arranged between at least one group of adjacent two groups of central magnetic structures. The edge washer is provided with a middle part covering the middle edge magnetic steel, and the middle part is provided with an avoiding concave part; the central magnetic structure is provided with a containing cavity, and a boss is arranged on the yoke and located in the containing cavity; a plurality of voice coils are arranged on the vibrating diaphragm assembly; the centering disk comprises a first fixing part, an elevated part, a cantilever part and a second fixing part which are connected in sequence, the second fixing part is fixed on the boss, the first fixing part is fixed on the vibrating diaphragm assembly, and the first fixing part is provided with a first conduction bonding pad which is conducted with a lead of the voice coil; and the bridging circuit board is arranged corresponding to the avoiding concave part and is provided with a bridging bonding pad which is conducted with the other lead of the voice coil. The sounding unit is novel in structure and excellent in performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electroacoustic transducer, especially relates to sound unit. BACKGROUND

[0002] In order to further improve the utilization of magnetic steel, provide stronger driving force, improve the sensitivity of sound unit, increase loudness, the current market appears the sound unit of multi voice coil architecture.

[0003] However, in order to improve the performance of sound unit, the existing sound unit mostly adopts big voice coil and big amplitude architecture design, part sound unit will be set up and pass through the center piece, and pass through the center piece and have the effect of passing through voice coil and external power supply and rectifying voice coil to improve voice coil roll vibration, in prior art, pass through the center piece is generally located the outside of voice coil, when sound unit adopts big amplitude design, pass through the center piece just has enough length in the air to avoid stress concentration and appear broken line, but in the sound unit of big voice coil architecture, the space left on the outside of voice coil is insufficient, and then cannot place side magnetic steel or pass through the center piece, leading to the performance cannot be further improved. UTILITY MODEL CONTENTS

[0004] The utility model solves technical problem for providing a kind of high-performance sound unit of multi voice coil architecture.

[0005] In order to solve the above technical problem, the technical scheme that the utility model adopts is as follows: sound unit, comprising:

[0006] Frame;

[0007] Magnetic circuit assembly, the magnetic circuit assembly is connected the frame, the magnetic circuit assembly includes yoke, peripheral side magnetic steel, intermediate side magnetic steel, side hua si and multiple center magnetic structures, the peripheral side magnetic steel, intermediate side magnetic steel and center magnetic structure are respectively arranged on the yoke, at least one group of two groups of the center magnetic structure between the adjacent is equipped with the intermediate side magnetic steel, the peripheral side magnetic steel is located the periphery of the center magnetic structure, the side hua si is connected the peripheral side magnetic steel and the intermediate side magnetic steel, the side hua si has the intermediate part that covers the intermediate side magnetic steel, the intermediate part is equipped with the recess for avoiding, the intermediate side magnetic steel has the avoiding structure for avoiding the recess for avoiding;The center magnetic structure has the accommodating cavity that communicates with its top surface, the yoke is equipped with boss, and the boss is located in the accommodating cavity;

[0008] Diaphragm assembly, the diaphragm assembly is connected the frame, and a plurality of voice coils are provided on the diaphragm assembly, and the voice coils are one-to-one arranged with the center magnetic structure;

[0009] The centering piece comprises a first fixing part, a heightening part, a cantilever part and a second fixing part connected in sequence, the second fixing part is fixed on the boss, the cantilever part is located in the accommodating cavity, the first fixing part is fixed on the diaphragm assembly, and a first conduction pad for conducting a lead of the voice coil is arranged on the first fixing part;

[0010] A bridge circuit board is arranged on the diaphragm assembly and corresponds to the avoiding recess, the bridge circuit board is provided with bridge conduction pads for conducting another lead of the voice coil, and the two bridge conduction pads on the bridge circuit board conduct each other.

[0011] In an embodiment, the avoiding structure is an avoiding groove, and the depth of the avoiding groove is less than the thickness of the middle side magnetic steel.

[0012] In an embodiment, the avoiding structure is an avoiding groove, and the depth of the avoiding groove is equal to the thickness of the middle side magnetic steel.

[0013] In an embodiment, the bottom surface of the avoiding recess contacts the yoke.

[0014] In an embodiment, the bottom of the avoiding recess is fixedly connected with the yoke.

[0015] In an embodiment, the avoiding recess is located in the middle region of the middle part.

[0016] In an embodiment, the diaphragm assembly comprises a cover plate, a ball top and a sound membrane arranged around the ball top, the sound membrane is connected with the yoke, the ball top is provided with a window, the edge of the window has a support arm extending downward, the support arm is arranged close to the heightening part, the support arm contacts the cantilever part and connects one end of the heightening part, and the cover plate is arranged on the ball top and closes the window.

[0017] In an embodiment, two adjacent centering pieces form a symmetrical structure.

[0018] In an embodiment, the yoke is provided with a through hole corresponding to the position of the boss, the boss is an insulator, the boss is provided with a conductive part, the second fixing part is provided with a second conduction pad, the second conduction pad conducts the conductive part and the first conduction pad respectively, and the bottom of the conductive part is exposed through the through hole.

[0019] In an embodiment, the centering spider further comprises a leading-out portion and an exposed portion, the yoke is provided with a through hole corresponding to the position of the boss, and the leading-out portion is connected to the second fixing portion at one end and connected to the exposed portion at the other end through the through hole and the through hole.

[0020] The sound generating unit structure is novel, the sound generating unit can simultaneously adopt a large voice coil and a large amplitude design framework, the voice coil can be larger, and the centering spider can also have sufficient overhanging length, so that the acoustic performance of the sound generating unit is effectively improved.

[0021] The magnetic induction line utilization rate of the central region of the center magnetic structure is relatively low, and the hollowing out of the central region of the center magnetic structure has little effect on the magnetic field of the sound generating unit itself, which is beneficial to guarantee the performance of the sound generating unit. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0023] Fig. 1 The exploded view of the sound generating unit of the present application embodiment one;

[0024] Fig. 2 The structure schematic diagram of the sound generating unit of the present application embodiment one hidden diaphragm assembly;

[0025] Fig. 3 The cross-sectional view of the sound generating unit of the present application embodiment one;

[0026] Fig. 4 The structure schematic diagram of the sound generating unit of the present application embodiment one hidden magnetic circuit assembly.

[0027] EXPLANATION OF DRAWINGS:

[0028] 1, the basin frame;

[0029] 2, magnetic circuit assembly; 21, yoke; 211, boss; 212, conductive part; 22, peripheral edge magnetic steel; 23, middle edge magnetic steel; 24, edge vane; 241, middle part; 242, avoiding concave part;

[0030] 25, center magnetic structure; 251, accommodating cavity; 252, center vane; 253, center magnetic steel;

[0031] 3, diaphragm assembly; 31, cover plate; 32, ball top; 321, window; 322, support arm; 33, sound film;

[0032] 4, centering support sheet; 41, first fixed part; 42, elevated part; 43, cantilever part; 44, second fixed part;

[0033] 5, bridge circuit board;

[0034] 6, voice coil. DETAILED DESCRIPTION

[0035] The utility model discloses the implementation, function characteristics and advantages will combine embodiment, reference drawing further explain.

[0036] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0037] It should be noted that if the embodiments of the utility model involve directional indications such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, such as shown in the drawings. If the specific posture changes, the directional indications also change accordingly.

[0038] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features.

[0039] In addition, the meaning of "and / or" appearing in the whole text is that three parallel schemes are included, for example, "and / or" includes the scheme, or the scheme, or the scheme that satisfies both. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the utility model.

[0040] In the present application, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0041] Embodiment one

[0042] Please refer to Figs. 1 to 4The utility model discloses an embodiment one for: sounding unit, including basin frame 1, magnetic circuit subassembly 2, diaphragm subassembly 3, center support sheet 4 and bridging circuit board 5, magnetic circuit subassembly 2 with diaphragm subassembly 3 is connected respectively basin frame 1, magnetic circuit subassembly 2 includes yoke iron 21, peripheral edge magnetic steel 22, intermediate edge magnetic steel 23, edge huasi 24 and multiple center magnetic structure 25, the magnetic pole polarity of adjacent two groups center magnetic structure 25 is same, peripheral edge magnetic steel 22, intermediate edge magnetic steel 23 and center magnetic structure 25 are arranged on yoke iron 21 respectively, at least one group adjacent two groups center magnetic structure 25 between is equipped with intermediate edge magnetic steel 23, peripheral edge magnetic steel 22 is located the periphery of center magnetic structure 25, edge huasi 24 connects peripheral edge magnetic steel 22 and intermediate edge magnetic steel 23, edge huasi 24 has the intermediate part 241 of covering intermediate edge magnetic steel 23, is equipped with the avoidance recess 242 on intermediate part 241, intermediate edge magnetic steel 23 has the avoidance structure of avoiding avoidance recess 242, preferably avoidance recess 242 is located the middle region of intermediate part 241;Center magnetic structure 25 has the accommodating cavity 251 of communicating its top surface, is equipped with the boss 211 on yoke iron 21, the boss 211 is located in accommodating cavity 251;Diaphragm subassembly 3 is equipped with multiple voice coil 6, voice coil 6 and center magnetic structure 25 are set up one to one correspondence;Center support sheet 4 includes first fixed part 41, frame high part 42, cantilever part 43 and second fixed part 44 that are sequentially connected, second fixed part 44 is fixed on boss 211, cantilever part 43 is located in accommodating cavity 251, first fixed part 41 is fixed on diaphragm subassembly 3, and first fixed part 41 is equipped with the first conduction pad that leads with the lead of voice coil 6;Bridge circuit board 5 is set up on diaphragm subassembly 3 and is set up corresponding to avoidance recess 242, and bridge circuit board 5 is equipped with the bridging pad that leads with the other lead of voice coil 6, and two bridging pads on bridge circuit board 5 are mutually conducted. Bridge circuit board 5 can be hard circuit board, also can be flexible circuit board, but preferably flexible circuit board.

[0043] In one or more embodiments, the avoidance structure is an avoidance groove, and the depth of the avoidance groove is less than the thickness of the intermediate edge magnetic steel 23. In this embodiment, the avoidance structure is an avoidance groove, and the depth of the avoidance groove is equal to the thickness of the intermediate edge magnetic steel 23, that is, the avoidance groove divides the intermediate edge magnetic steel 23 into two parts. Preferably, the bottom surface of the avoidance recess 242 contacts the yoke iron 21, which can improve the structural stability of the sounding unit. Further preferably, the bottom of the avoidance recess 242 is fixedly connected to the yoke iron 21. The specific connection mode of the avoidance recess 242 and the yoke iron 21 includes, but is not limited to, adhesive connection, welding, etc.

[0044] Specifically, the center magnetic structure 25 comprises a center Hua Si 252 and a center magnetic steel 253 connecting the center Hua Si 252 and the yoke 21, the accommodating cavity 251 comprises a first part provided on the center Hua Si 252 and a second part provided on the center magnetic steel 253, and the first part and the second part are in communication. The peripheral edge magnetic steel 22 can be a continuous and integrated ring frame structure, or a ring frame structure surrounded by a plurality of small magnetic steels.

[0045] The vibrating diaphragm assembly 3 comprises a cover plate 31, a ball top 32, and a sound film 33 arranged around the ball top 32, the sound film 33 is connected to the yoke 1, the ball top 32 is provided with a window 321, the edge of the window 321 has a support arm 322 extending downward, the support arm 322 is arranged close to the elevated portion 42, the support arm 322 contacts one end of the elevated portion 42 connected to the cantilever portion 43, and the cover plate 31 is arranged on the ball top 32 and covers the window 321. The support arm 322 can support the cantilever portion 43, which is conducive to improving the working stability of the sound generating unit. Preferably, the support arm 322 is fixedly connected to one end of the elevated portion 42 connected to the cantilever portion 43 and / or the elevated portion 42, which can further improve the structural stability of the sound generating unit.

[0046] The two adjacent centering fins 4 form a symmetrical structure. In this embodiment, the two adjacent centering fins 4 are centrally symmetrical, and in other embodiments, the two adjacent centering fins 4 can also be plane symmetrical.

[0047] In other embodiments, the number of cantilever portions 43 in the centering fin 4 can be multiple. In this embodiment, the number of cantilever portions 43 is one. Compared with the multi-cantilever structure, the single-cantilever structure of the centering fin 4 occupies less space, so that the volume of the center magnetic structure 25 can be larger, thereby improving the performance of the sound generating unit.

[0048] In one or more embodiments, the yoke 21 is provided with a through hole corresponding to the position of the boss 211, the boss 211 is an insulator, the boss 211 is provided with a conductive part 212, the second fixed portion 44 is provided with a second conductive pad, the second conductive pad is in conductive communication with the conductive part 212 and the first conductive pad respectively, and the bottom of the conductive part 212 is exposed outside through the through hole to be electrically connected with an external power supply. The conductive part 212 can be a metal structural part.

[0049] In one or more embodiments, the centering vane 4 further comprises a leading-out portion and an exposed portion, the yoke 21 is provided with a through hole corresponding to the position of the boss 211, one end of the leading-out portion is connected to the second fixed portion 44, the other end of the leading-out portion passes through the through hole and the through hole and is connected to the exposed portion, the exposed portion is exposed on the bottom surface of the yoke 21, and the exposed portion is provided with an exposed pad in conductive connection with the first conductive pad, and the exposed pad is used for connecting an external power supply.

[0050] The above is only an optional embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by the utility model specification and the attached drawings under the inventive concept of the utility model, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A sound-generating unit, characterized in that: include Sink stand; A magnetic circuit assembly is connected to the basin frame. The magnetic circuit assembly includes a yoke, peripheral side magnets, intermediate side magnets, a side washer, and multiple sets of central magnetic structures. The peripheral side magnets, intermediate side magnets, and central magnetic structures are respectively disposed on the yoke. At least one set of two adjacent sets of central magnetic structures has an intermediate side magnet disposed between them. The peripheral side magnets are located around the central magnetic structures. The side washer connects the peripheral side magnets and the intermediate side magnets. The side washer has a middle portion covering the intermediate side magnets. The middle portion has a relief recess. The intermediate side magnets have a relief structure that avoids the relief recess. The central magnetic structure has a receiving cavity communicating with its top surface. The yoke has a boss located in the receiving cavity. A diaphragm assembly is connected to the frame, and the diaphragm assembly is provided with multiple voice coils, each voice coil corresponding to a central magnetic structure. A centering support plate, comprising a first fixing part, a raised part, a cantilever part and a second fixing part connected in sequence, wherein the second fixing part is fixed to the boss, the cantilever part is located in the receiving cavity, the first fixing part is fixed to the diaphragm assembly, and the first fixing part is provided with a first conductive pad that is connected to a lead wire of the voice coil. A bridging circuit board is disposed on the diaphragm assembly and corresponding to the relief recess. The bridging circuit board has a bridging pad that is connected to another lead of the voice coil, and the two bridging pads on the bridging circuit board are interconnected.

2. The sound-generating unit according to claim 1, characterized in that: The avoidance structure is an avoidance groove, and the depth of the avoidance groove is less than the thickness of the middle side magnet.

3. The sound-generating unit according to claim 1, characterized in that: The avoidance structure is an avoidance groove, and the depth of the avoidance groove is equal to the thickness of the middle side magnet.

4. The sound-generating unit according to claim 3, characterized in that: The bottom surface of the avoidance recess contacts the yoke.

5. The sound-generating unit according to claim 4, characterized in that: The bottom of the clearance recess is fixedly connected to the yoke.

6. The sound-generating unit according to claim 1, characterized in that: The clearance recess is located in the central region of the middle part.

7. The sound-generating unit according to claim 1, characterized in that: The diaphragm assembly includes a cover plate, a dome, and a diaphragm surrounding the dome. The diaphragm is connected to the frame. The dome has an opening with a downwardly extending support arm along its edge. The support arm is located near the frame and contacts one end of the cantilever that connects to the frame. The cover plate is located on the dome and closes the opening.

8. The sound-generating unit according to claim 1, characterized in that: The two adjacent centering supports form a symmetrical structure.

9. The sound-generating unit according to claim 1, characterized in that: The yoke has a through hole corresponding to the position of the boss. The boss is an insulator and has a conductive element. The second fixing part has a second conductive pad. The second conductive pad is connected to the conductive element and the first conductive pad respectively. The bottom of the conductive element is exposed through the through hole.

10. The sound-generating unit according to claim 1, characterized in that: The centering support also includes an outlet portion and an exposed portion. The yoke has a through hole corresponding to the position of the boss. The boss has a through hole. One end of the outlet portion is connected to the second fixing portion. The other end of the outlet portion passes through the through hole and the through hole, exits the receiving cavity, and is connected to the exposed portion. The exposed portion is exposed on the bottom surface of the yoke. The exposed portion has an exposed pad that is connected to the first conductive pad.

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