In-line and miniature speakers

Abstract

This utility model discloses a center mount and a miniature loudspeaker. The center mount has a frame-shaped adhesive area, and at least one set of opposite sides of the adhesive area are provided with limiting protrusions. The limiting protrusions include an inner protrusion located inside the adhesive area and an outer protrusion located outside the adhesive area. The sum of the inner and outer protrusions is at least three, and the inner and outer protrusions are staggered. The center mount is used to bond and fix the voice coil. At least one set of opposite sides of the adhesive area has alternating staggered inner and outer protrusions, forming a locking structure that can hold the voice coil. When the voice coil and the center mount are assembled, the limiting protrusions greatly reduce the fluctuation range of the voice coil during installation, thereby making the position of the voice coil in the magnetic gap of the miniature loudspeaker more stable after the voice coil is fixed to the center mount. This improves the voice coil rolling vibration and polarization phenomenon, which is beneficial to improving the sound quality of the miniature loudspeaker.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic converter technology, and in particular to in-cell and miniature loudspeakers. Background Technology

[0002] Miniature speakers are widely used in portable electronic devices such as mobile phones, laptops, and hearing aids. With the rapid development of these portable electronic devices, the quality requirements for the miniature speakers used in them are becoming increasingly stringent. The assembly precision of miniature speaker products is one of the factors affecting the sound quality of miniature speakers.

[0003] In the past, the center mount of miniature loudspeakers was mostly a flat and uniform plane. If the glue application needle was slightly off-center or the tolerance of the positioning fixture fluctuated, it would cause the bonding between the center mount and the voice coil to be off-center, resulting in phenomena such as rubbing and rolling vibration when the miniature loudspeaker was working. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to provide a center sticker with small voice coil misalignment and high assembly accuracy in the production process of a miniature loudspeaker, and a miniature loudspeaker with such a center sticker.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a center patch, wherein the center patch has a frame-shaped adhesive area, and at least one set of opposite sides of the adhesive area are provided with limiting protrusions, wherein the limiting protrusions include an inner protrusion located inside the adhesive area and an outer protrusion located outside the adhesive area; wherein the sum of the number of the inner protrusions and the outer protrusions is at least three, and the inner protrusions and the outer protrusions are staggered.

[0006] Furthermore, the limiting protrusion has two inner protrusions and one outer protrusion; or, the limiting protrusion has two outer protrusions and one inner protrusion.

[0007] Furthermore, the limiting protrusion and the middle adhesive are separate structures, and the limiting protrusion and the middle adhesive are fixedly connected.

[0008] Furthermore, the limiting protrusion and the central adhesive are integrally formed into a single structure.

[0009] Furthermore, the limiting protrusion is a stamped convex structure.

[0010] Furthermore, the limiting protrusions are arranged along the periphery of the bonding area, and include at least two sets of opposing limiting protrusions.

[0011] To solve the above-mentioned technical problems, the present invention also adopts the following technical solution: a miniature loudspeaker, including the above-mentioned in-line sticker.

[0012] Furthermore, it also includes a voice coil, the top surface of which is bonded and fixed within the bonding area, the inner protrusion being located on the inner side of the voice coil, and the outer protrusion being located on the outer side of the voice coil.

[0013] Furthermore, at least one of the inner protrusion and the outer protrusion is bonded and fixed to the voice coil.

[0014] Furthermore, it also includes a magnetic circuit system, which includes a yoke and a central magnetic component and a side magnetic component respectively disposed on the yoke, wherein at least one of the central magnetic component and the side magnetic component has a clearance groove for avoiding the limiting protrusion.

[0015] The beneficial effects of this invention are as follows: The bonding area of ​​the middle adhesive for bonding and fixing the voice coil has at least one set of alternately staggered inner and outer protrusions, forming a locking structure that can hold the voice coil in place. When the voice coil and the middle adhesive are assembled, the limiting protrusions greatly reduce the fluctuation range of the voice coil during installation (i.e., reduce the offset when the voice coil is bonded), thereby making the position of the voice coil in the magnetic gap of the miniature speaker more stable after the voice coil and the middle adhesive are fixed, improving voice coil rolling vibration and polarization phenomena, and thus improving the sound quality of the miniature speaker. Furthermore, the setting of the limiting protrusions restricts the flow range of the adhesive bonding the voice coil and the middle adhesive, facilitating the adhesive to climb onto the inner or outer wall of the voice coil, thereby making the bonding between the voice coil and the middle adhesive more reliable, reducing the risk of voice coil separation, and improving the structural stability of the miniature speaker. In addition, the alternating staggered arrangement of the inner and outer protrusions in the limiting protrusions ensures that the limiting protrusions can stably hold the voice coil in place without adversely affecting the structural strength of the middle adhesive. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a miniature loudspeaker;

[0017] Figure 2 A cross-sectional view of a miniature loudspeaker;

[0018] Figure 3 for Figure 2 Enlarged view of detail A in the middle;

[0019] Figure 4 This is a schematic diagram of the vibration system of a miniature loudspeaker;

[0020] Figure 5 In order to be in Figure 4 A schematic diagram of the structure shown, with the voice coil hidden.

[0021] Label Explanation:

[0022] 1. Pot stand;

[0023] 2. Yoke;

[0024] 3. Central magnetic assembly; 31. Central washer; 32. Central magnet;

[0025] 4. Edge magnetic assembly; 41. Edge washer; 42. Edge magnet;

[0026] 5. Diaphragm; 51. Internal fixation part; 511. Window; 52. Folded ring part; 53. External fixation part;

[0027] 6. Center plate; 61. Adhesive area; 62. Inner protrusion; 63. Outer protrusion;

[0028] 7. Voice coil;

[0029] 8. Clearance groove. Detailed Implementation

[0030] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0031] Please refer to Figures 1 to 5 The middle adhesive 6 has a frame-shaped adhesive area 61. At least one set of opposite sides of the adhesive area 61 are provided with limiting protrusions. The limiting protrusions include an inner protrusion 62 located inside the adhesive area 61 and an outer protrusion 63 located outside the adhesive area 61. The number of the limiting protrusions, including the inner protrusion 62 and the outer protrusion 63, is at least three. The inner protrusion 62 and the outer protrusion 63 are arranged alternately.

[0032] As can be seen from the above description, the beneficial effects of this utility model are as follows: At least one set of opposite sides of the bonding area 61 of the middle adhesive 6, used to bond and fix the voice coil 7, has alternating staggered inner protrusions 62 and outer protrusions 63, forming a locking structure that can hold the voice coil 7 in place. When the voice coil 7 and the middle adhesive 6 are assembled, the limiting protrusions greatly reduce the fluctuation range of the voice coil 7 during installation (i.e., reduce the offset of the voice coil 7 during bonding), thereby making the position of the voice coil 7 in the magnetic gap of the miniature speaker more stable after the voice coil 7 and the middle adhesive 6 are fixed, improving the rolling vibration and polarization phenomenon of the voice coil 7, and thus improving the sound quality of the miniature speaker. Furthermore, the setting of the limiting protrusions restricts the flow range of the adhesive bonding the voice coil 7 and the middle adhesive 6, facilitating the adhesive to climb onto the inner or outer wall of the voice coil 7, thereby making the bonding between the voice coil 7 and the middle adhesive 6 more reliable, reducing the risk of the voice coil 7 coming unglued, and improving the structural stability of the miniature speaker. In addition, the alternating staggered arrangement of the inner protrusion 62 and the outer protrusion 63 in the limiting protrusion ensures that the limiting protrusion can stably lock the voice coil 7 without adversely affecting the structural strength of the center sticker 6.

[0033] Furthermore, the limiting protrusion has two inner protrusions 62 and one outer protrusion 63; or, the limiting protrusion has two outer protrusions 63 and one inner protrusion 62.

[0034] As can be seen from the above description, the number of inner protrusions 62 and outer protrusions 63 in the limiting protrusions is small, which can reduce the impact of the setting of the limiting protrusions on the structural strength / total weight of the middle patch 6.

[0035] Furthermore, the limiting protrusion and the middle patch 6 are separate structures, and the limiting protrusion and the middle patch 6 are fixedly connected.

[0036] As can be seen from the above description, the limiting protrusion can be fixed to the middle patch 6 by means of bonding, welding or other methods.

[0037] Furthermore, the limiting protrusion and the central patch 6 are integrally formed into a single structure.

[0038] As can be seen from the above description, the integral processing of the limiting protrusion and the center sticker 6 can facilitate the processing and manufacturing of the center sticker 6 and help control the assembly cost of the miniature speaker.

[0039] Furthermore, the limiting protrusion is a stamped convex structure.

[0040] As can be seen from the above description, the stamped protrusion of the limiting protrusion not only facilitates the production and manufacturing of the center patch 6, but also ensures the lightweight of the center patch 6, and also ensures the positional accuracy of the limiting protrusion on the center patch 6, thereby ensuring the assembly accuracy of the voice coil 7 and the center patch 6.

[0041] Furthermore, the limiting protrusions are arranged along the periphery of the bonding area 61, and include at least two sets of opposing limiting protrusions.

[0042] As can be seen from the above description, the center sticker 6 can effectively restrict the voice coil 7's degree of freedom in the plane, which is conducive to further improving the assembly accuracy of the voice coil 7 and the center sticker 6.

[0043] To solve the above-mentioned technical problems, the present invention also adopts the following technical solution: a miniature loudspeaker, including the above-mentioned middle sticker 6.

[0044] Furthermore, it also includes a voice coil 7, the top surface of which is bonded and fixed within the bonding area 61, the inner protrusion 62 being located inside the voice coil 7, and the outer protrusion 63 being located outside the voice coil 7.

[0045] As can be seen from the above description, the limiting protrusion can effectively limit the voice coil 7.

[0046] Furthermore, at least one of the inner protrusion 62 and the outer protrusion 63 is bonded and fixed to the voice coil 7.

[0047] As can be seen from the above description, by bonding the voice coil 7 to the limiting protrusion, the bonding area between the voice coil 7 and the center sticker 6 is increased, which helps to improve the bonding force between the voice coil 7 and the center sticker 6 and reduce the probability of the voice coil 7 falling off.

[0048] Furthermore, it also includes a magnetic circuit system, which includes a yoke 2 and a central magnetic component 3 and a side magnetic component 4 respectively disposed on the yoke 2, wherein at least one of the central magnetic component 3 and the side magnetic component 4 has a clearance groove 8 for avoiding the limiting protrusion.

[0049] As can be seen from the above description, the setting of the clearance groove 8 can prevent the limiting protrusion from colliding with the magnetic circuit assembly and generating noise during the operation of the miniature speaker.

[0050] Please refer to Figures 1 to 5 Embodiment 1 of this utility model is as follows:

[0051] like Figures 1 to 2 As shown, a miniature loudspeaker is provided, including a frame 1 and a magnetic circuit system and a vibration system respectively connected to the frame 1. The magnetic circuit system includes a yoke 2 and a central magnetic component 3 and a side magnetic component 4 respectively disposed on the yoke 2. The central magnetic component 3 is located between at least one set of two oppositely disposed side magnetic components 4. A magnetic gap is formed between the central magnetic component 3 and the side magnetic components 4. The central magnetic component 3 includes a central washer 31 and a central magnet 32 ​​respectively connecting the central washer 31 and the yoke 2. The side magnetic component 4 includes a side washer 41 and a side magnet 42 respectively connecting the side washer 41 and the yoke 2. The side washer 41 is connected to the frame 1. In this embodiment, the side washer 41 and the frame 1 are an integral structure formed by insert injection molding.

[0052] The vibration system includes a diaphragm 5, a center patch 6, and a voice coil 7. The diaphragm 5 connects the center patch 6 to the frame 1, and the center patch 6 is positioned in the central area of ​​the diaphragm 5. (Refer to...) Figure 3The middle adhesive 6 has a frame-shaped bonding area 61, which is used to bond and fix to the top surface of the voice coil 7. At least one set of opposite sides of the bonding area 61 is provided with limiting protrusions, which are connected to the middle adhesive 6. The limiting protrusions include an inner protrusion 62 located inside the bonding area 61 and an outer protrusion 63 located outside the bonding area 61. That is, when the voice coil 7 is bonded and fixed to the middle adhesive 6, the inner protrusion 62 is located inside the voice coil 7, and the outer protrusion 63 is located outside the voice coil 7. Furthermore, both the inner protrusion 62 and the outer protrusion 63 are in contact with the surface of the voice coil 7. Among the limiting protrusions, the sum of the number of the inner protrusion 62 and the outer protrusion 63 is at least three, and the inner protrusion 62 and the outer protrusion 63 are staggered.

[0053] Specifically, refer to Figures 4 to 5 The diaphragm 5 includes an inner fixing part 51, a folded ring part 52, and an outer fixing part 53 connected sequentially from the inside out. The inner fixing part 51 is provided with a window 511. The middle adhesive 6 connects to the inner fixing part 51 and closes the window 511. The outer fixing part 53 connects to the basin frame 1. In other embodiments, the inner fixing part 51 may not have a window 511. In this case, the middle adhesive 6 is located on the bottom surface of the middle region of the inner fixing part 51.

[0054] The limiting protrusions are arranged along the periphery of the bonding area 61, and the center patch 6 includes at least two sets of opposing limiting protrusions. When the voice coil 7 is rectangular, the bonding area 61 is also adapted to be rectangular. In this case, it is preferable that the four sides of the bonding area 61 are respectively provided with the limiting protrusions.

[0055] To minimize the impact of the limiting protrusions on the structural strength of the center patch 6 and the low-frequency performance of the miniature speaker, the number of the inner protrusion 62 and the outer protrusion 63 should be minimized. In this embodiment, referring to... Figure 5 In the limiting protrusion, there are two outer protrusions 63 and one inner protrusion 62. In parallel embodiments, it is also acceptable for the limiting protrusion to have two inner protrusions 62 and one outer protrusion 63.

[0056] When the limiting protrusion and the middle adhesive 6 are separate structures, the limiting protrusion and the middle adhesive 6 are fixedly connected. Specific fixing methods for the limiting protrusion and the middle adhesive 6 include, but are not limited to, adhesive bonding and welding. However, in a preferred embodiment, the limiting protrusion and the middle adhesive 6 are integrally formed. In this embodiment, the limiting protrusion is a stamped convex structure. In other embodiments, the limiting protrusion can be a solid structure.

[0057] To improve the structural stability of the vibration system, in one or more embodiments, reference is made to... Figure 4 At least one of the inner protrusion 62 and the outer protrusion 63 is bonded and fixed to the voice coil 7. Specifically, when the inner protrusion 62 is bonded and fixed to the voice coil 7, the outer wall surface of the inner protrusion 62 is bonded and fixed to the inner wall surface of the voice coil 7; when the outer protrusion 63 is bonded and fixed to the voice coil 7, the inner wall surface of the outer protrusion 63 is bonded and fixed to the outer wall surface of the voice coil 7.

[0058] To prevent the limiting protrusion from colliding with the magnetic circuit assembly during vibration, at least one of the central magnetic assembly 3 and the side magnetic assembly 4 has a clearance groove 8 for avoiding the limiting protrusion. When the central magnetic assembly 3 has the clearance groove 8, the clearance groove 8 is located at the edge of the top surface of the central washer 31 to avoid the inner protrusion 62; when the side magnetic assembly 4 has the clearance groove 8, the clearance groove 8 is located at the inner edge of the top surface of the side washer 41 to avoid the outer protrusion 63.

[0059] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A central patch, characterized in that, The adhesive has a frame-shaped bonding area, and at least one set of opposite sides of the bonding area are provided with limiting protrusions. The limiting protrusions include an inner protrusion located inside the bonding area and an outer protrusion located outside the bonding area. The sum of the number of the inner protrusions and the outer protrusions is at least three, and the inner protrusions and the outer protrusions are staggered.

2. The middle patch according to claim 1, characterized in that, The limiting protrusion has two inner protrusions and one outer protrusion; or, the limiting protrusion has two outer protrusions and one inner protrusion.

3. The middle patch according to claim 1, characterized in that, The limiting protrusion and the center sticker are separate structures, and the limiting protrusion and the center sticker are fixedly connected.

4. The middle patch according to claim 1, characterized in that, The limiting protrusion and the central adhesive are integrally formed into a single structure.

5. The center patch according to claim 4, characterized in that, The limiting protrusion is a stamped convex structure.

6. The center patch according to claim 1, characterized in that, The limiting protrusions are arranged along the periphery of the bonding area, and include at least two sets of opposing limiting protrusions.

7. A miniature loudspeaker, characterized in that, Includes the center patch as described in any one of claims 1-6.

8. The miniature loudspeaker according to claim 7, characterized in that, It also includes a voice coil, the top surface of which is bonded and fixed within the bonding area, the inner protrusion being located inside the voice coil, and the outer protrusion being located outside the voice coil.

9. The miniature loudspeaker according to claim 8, characterized in that, At least one of the inner protrusion and the outer protrusion is bonded and fixed to the voice coil.

10. The miniature loudspeaker according to claim 7, characterized in that, It also includes a magnetic circuit system, which includes a yoke and a central magnetic component and a side magnetic component respectively disposed on the yoke, at least one of the central magnetic component and the side magnetic component having a clearance groove for avoiding the limiting protrusion.

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