Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a rectangular voice coil, two shaping support chips and two auxiliary films, the two shaping support chips are respectively connected with two corners of the rectangular voice coil in a one-to-one correspondence manner, and the shaping support chips are electrically conducted with the rectangular voice coil; the two auxiliary films are respectively connected with the other two corners of the rectangular voice coil in a one-to-one correspondence manner. The sound production unit is novel in structure, the auxiliary film is used for replacing part of the shaping support chip, and compared with the shaping support chip, the auxiliary film occupies a smaller space, so that the total volume of the edge magnetic structure can be set to be larger, and the BL value and the sensitivity of the whole sound production unit can be improved.

Description

Sound unit Technical Field

[0001] This utility model relates to the field of electroacoustic converter technology, and in particular to a sound generating unit. Background Technology

[0002] As electronic devices such as mobile phones and tablets become smaller and thinner, the installation space left for sound units is getting smaller and smaller. At the same time, the sensitivity requirements of electronic devices for sound units are increasing. Therefore, how to improve the sensitivity of sound units under the constraints of product structure and size has become a difficult problem that industry technicians need to overcome.

[0003] Existing drivers typically have shaped supports installed at the four corners of the rectangular voice coil, which are then fixedly connected to the frame. However, the side magnet structure corresponding to the shaped support position often requires a large area of ​​clearance design, resulting in a smaller overall volume of the side magnet structure. Consequently, the overall BL value of the driver is small, and the sensitivity of the driver is low. Summary of the Invention

[0004] The technical problem solved by this utility model is to provide a high-sensitivity sound-generating unit.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sound-generating unit, comprising:

[0006] Rectangular voice coil;

[0007] Two shaped supports are connected to the two corners of the rectangular voice coil respectively, and the shaped supports are electrically connected to the rectangular voice coil.

[0008] Two sub-diaphragms are connected to the other two corners of the rectangular voice coil, respectively.

[0009] In one embodiment, the two shaping support sheets are symmetrically arranged in plane, and the two sub-membrane sheets are symmetrically arranged in plane.

[0010] In one embodiment, the two shaping supports are arranged symmetrically at the center, and the two sub-films are arranged symmetrically at the center.

[0011] In one embodiment, the system further includes a magnetic circuit assembly, which includes a side magnetic structure. The shaping support includes an inner mounting portion, a cantilever portion, and an outer mounting portion connected in sequence. The inner mounting portion is fixedly connected to the rectangular voice coil. The end of the side magnetic structure has a clearance groove, and the end of the cantilever portion away from the inner mounting portion extends into the clearance groove.

[0012] In one embodiment, the clearance groove is connected to the outer wall surface of the side magnetic structure.

[0013] In one embodiment, the magnetic circuit assembly further includes a yoke and a central magnetic structure disposed on the yoke. The central magnetic structure is disposed corresponding to the hollow region of the rectangular voice coil. The side magnetic structure is fixedly connected to the yoke, and a magnetic gap is formed between the side magnetic structure and the central magnetic structure to allow the rectangular voice coil to move.

[0014] In one embodiment, the system further includes a frame and a diaphragm assembly, the diaphragm assembly connecting the frame and the rectangular voice coil, and the magnetic circuit assembly connecting the frame.

[0015] In one embodiment, the sub-membrane includes an inner fixing portion, a folded ring portion, and an outer fixing portion connected in sequence.

[0016] The beneficial effects of this utility model are as follows: The sound-generating unit has a novel structure, which uses a secondary diaphragm to replace part of the fixed support plate. Compared with the fixed support plate, the secondary diaphragm occupies less space, thereby allowing the overall volume of the side magnetic structure to be set larger, which is beneficial to improving the overall BL value and sensitivity of the sound-generating unit. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 is a cross-sectional view of the first structural sound-generating unit of Embodiment 1;

[0019] Figure 2 is an exploded view of the first type of sound-generating unit in Embodiment 1;

[0020] Figure 3 is a schematic diagram of a portion of the structure of the first type of sound-generating unit in Embodiment 1;

[0021] Figure 4 is a schematic diagram of a portion of the structure of the second type of sound-generating unit in Embodiment 1.

[0022] Explanation of icon numbers:

[0023] 1. Pot stand;

[0024] 2. Magnetic circuit assembly; 21. Yoke; 22. Central magnetic structure; 23. Side magnetic structure; 24. Clearance slot;

[0025] 3. Diaphragm assembly;

[0026] 4. Rectangular voice coil;

[0027] 5. Shaping support sheet;

[0028] 6. Secondary membrane. Detailed Implementation

[0029] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0033] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] Example 1

[0036] Referring to Figures 1 to 4, Embodiment 1 of this utility model is as follows: a sound-generating unit includes a frame 1, a magnetic circuit assembly 2, a diaphragm assembly 3, a rectangular voice coil 4, two shaping supports 5, and two auxiliary diaphragms 6. The magnetic circuit assembly 2 and the diaphragm assembly 3 are respectively connected to the frame 1, and the diaphragm assembly 3 is connected to the rectangular voice coil 4. The magnetic circuit assembly 2 includes a yoke 21 and a central magnetic structure 22 and a side magnetic structure 23 respectively disposed on the yoke 21. The central magnetic structure 22 is disposed corresponding to the hollow area of ​​the rectangular voice coil 4. A magnetic gap is formed between the side magnetic structure 23 and the central magnetic structure 22 for the rectangular voice coil 4 to move. Specifically, the central magnetic structure 22 includes a central washer and a central magnet respectively connecting the central washer and the yoke 21. The side magnetic structure 23 includes a side washer and a side magnet respectively connecting the side washer and the yoke 21. The side washer is connected to the frame 1. More specifically, the four sides of the voice coil are respectively provided with the side magnetic structure 23.

[0037] The two shaping supports 5 are respectively connected to the two corners of the rectangular voice coil 4, and the shaping supports 5 are electrically connected to the rectangular voice coil 4; the two auxiliary diaphragms 6 are respectively connected to the other two corners of the rectangular voice coil 4.

[0038] In detail, the shaping support 5 includes an inner mounting part, a cantilever part and an outer mounting part connected in sequence. The outer mounting part is fixedly connected to the frame 1, and the inner mounting part is fixedly connected to the rectangular voice coil 4.

[0039] In one or more embodiments, the end of the side magnetic structure 23 has a clearance groove 24, and the end of the cantilever portion away from the inner mounting portion extends into the clearance groove 24. Preferably, the clearance groove 24 communicates with the outer wall surface of the side magnetic structure 23, which can minimize the impact of the clearance groove 24 on the magnetic field strength of the side magnetic structure 23 with the clearance groove 24, thus helping to ensure the sensitivity of the sound-generating unit.

[0040] The sub-diaphragm 6 includes an inner fixing part, a folding ring part, and an outer fixing part connected in sequence. The inner fixing part is connected to the rectangular voice coil 4, and the outer fixing part is connected to the frame 1.

[0041] In the first sound-generating unit structure of this embodiment, the two shaping support plates 5 are symmetrically arranged in plane, and the two sub-diaphragms 6 are symmetrically arranged in plane. In the second sound-generating unit structure of this embodiment, the two shaping support plates 5 are centrally symmetrically arranged, and the two sub-diaphragms 6 are centrally symmetrically arranged. The sub-diaphragms 6 and the shaping support plates 5 balance the tension of the rectangular voice coil 4, which can effectively improve the rolling vibration phenomenon of the rectangular voice coil 4.

[0042] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A sound-generating unit, characterized in that: It includes a rectangular voice coil; two shaped supports, each of which is connected to one of the two corners of the rectangular voice coil and is electrically connected to the rectangular voice coil; and two secondary diaphragms, each of which is connected to the other two corners of the rectangular voice coil.

2. The sound-generating unit according to claim 1, characterized in that: The two shaping support sheets are symmetrically arranged in plane, and the two sub-membrane sheets are symmetrically arranged in plane.

3. The sound-generating unit according to claim 1, characterized in that: The two shaping support sheets are arranged symmetrically at their centers, and the two sub-films are arranged symmetrically at their centers.

4. The sound-generating unit according to claim 1, characterized in that: It also includes a magnetic circuit assembly, which includes a side magnetic structure. The shaping support includes an inner mounting part, a cantilever part, and an outer mounting part connected in sequence. The inner mounting part is fixedly connected to the rectangular voice coil. The end of the side magnetic structure has a clearance groove. The end of the cantilever part away from the inner mounting part extends into the clearance groove.

5. The sound-generating unit according to claim 4, characterized in that: The clearance groove is connected to the outer wall surface of the edge magnetic structure.

6. The sound-generating unit according to claim 4, characterized in that: The magnetic circuit assembly further includes a yoke and a central magnetic structure disposed on the yoke. The central magnetic structure is disposed corresponding to the hollow region of the rectangular voice coil. The side magnetic structure is fixedly connected to the yoke, and a magnetic gap is formed between the side magnetic structure and the central magnetic structure to allow the rectangular voice coil to move.

7. The sound-generating unit according to claim 4, characterized in that: It also includes a frame and a diaphragm assembly, the diaphragm assembly connecting the frame and the rectangular voice coil, and the magnetic circuit assembly connecting the frame.

8. The sound-generating unit according to claim 1, characterized in that: The sub-membrane includes an inner fixing part, a folded ring part, and an outer fixing part connected in sequence.

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