Flat horn with external bonding pad
By designing an embedded washer bump structure in the speaker, the problems of soldering difficulty and defect rate caused by pad placement were solved, and the miniaturization design of the speaker was realized, reducing the thickness to less than 1mm.
Patent Information
- Application Number
- CN202520469781.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-18
AI Technical Summary
In the miniaturization process of traditional loudspeakers, the placement of solder pads leads to increased soldering difficulty and high defect rates, especially as space cannot be effectively utilized when the loudspeaker becomes thinner.
The speaker's side is designed as a rectangular bump that is embedded in the housing. Pads are placed on the bump, eliminating the dependence on the side PCB and allowing direct soldering on the bump, thus reducing the speaker's thickness.
This achievement reduces the speaker thickness to less than 1mm, saving space and reducing welding difficulty and defect rate.
Smart Images
Figure CN223885318U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of loudspeaker technology, specifically to a flat loudspeaker with an external solder pad. Background Technology
[0002] With the miniaturization trend in electronic products, the core sound-generating component, the speaker, needs to become thinner and smaller. However, as the speaker becomes thinner, the solder pads cannot be placed on the bottom of the speaker because it would increase the speaker's thickness. Therefore, the traditional method is to place a PCB on the side of the speaker for soldering, but this increases the difficulty of soldering and leads to a higher defect rate. Utility Model Content
[0003] The purpose of this utility model is to provide a flat speaker with an external solder pad. By embedding the washer into the shell at the bottom and setting the side of the washer as a protruding rectangular bump, the PCB position of the side does not need to be considered. This allows the speaker thickness to be less than 1mm, which greatly saves space and solves the problems in the prior art.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A flat panel speaker with external pads includes a housing, an internal magnetic circuit, a washer bonded to the bottom of the magnetic circuit, the washer having a rectangular protrusion extending outward from a slot on the side of the housing, a pad being mounted on the protrusion, a support ring being provided at the top of the magnetic circuit, and a diaphragm being mounted at the top of the support ring.
[0006] Furthermore, a limiting ring is installed between the edge of the diaphragm and the outer shell.
[0007] Furthermore, a voice coil connected to the pad via a wire is bonded in the concave structure at the center of the diaphragm.
[0008] Furthermore, a voice coil is bonded to the bottom central plane of the diaphragm.
[0009] Furthermore, the protrusion of the bump from the outer shell is 0.5 mm in length.
[0010] Furthermore, the outer shell has steps, and a diaphragm is disposed between the steps and the support ring.
[0011] Furthermore, the magnetic circuit includes an inner magnet and an outer magnet, with the inner magnet positioned at the center of the outer magnet.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] This invention embeds the washer into the outer shell at the bottom, thus avoiding taking up space in the height of the speaker. By setting the side of the washer as a protruding rectangular bump that protrudes outward from the outer shell, the PCB position on the side does not need to be considered. The PCB is directly set on the pads of the bump, which allows the speaker thickness to be less than 1mm, greatly saving space. Attached Figure Description
[0014] Figure 1 This is a top view assembly diagram of the flat horn with an external solder pad without steps according to this utility model.
[0015] Figure 2 This is an assembly diagram of the flat horn with an external solder pad without steps, viewed from below.
[0016] Figure 3 This utility model Figure 1 A schematic diagram of the decomposition process;
[0017] Figure 4 This utility model Figure 1 A sectional view;
[0018] Figure 5 This is a cross-sectional view of the flat horn with stepped external pads of this utility model.
[0019] In the diagram: 1. Outer shell; 2. Washer; 3. Bump; 4. Pad; 5. Diaphragm; 6. Limiting ring; 7. Voice coil; 8. Support ring; 9. Inner magnet; 10. Outer magnet. Detailed Implementation
[0020] 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.
[0021] Example 1: Please refer to Figures 1-4A flat plate loudspeaker with external solder pad, comprising a shell 1, the inside of the shell 1 is provided with a magnetic circuit, the magnetic circuit comprises an inner magnet 9 and an outer magnet 10, the inner magnet 9 is arranged in the center of the outer magnet 10, the magnetic circuit can be circular or square. The material of the magnet is Nd-Fe-B permanent magnet, wherein the magnetism of the inner magnet and the outer magnet is opposite, and both are Y axis direction magnetism. There can be a gap between the inner magnet 9 and the outer magnet 10, or there can be no gap, the bottom of the magnetic circuit is bonded with a Huasi 2, the Huasi 2 has a rectangular protrusion 3 extending outwards from the slot hole of the side of the shell 1, the solder pad 4 is installed on the protrusion 3, which is convenient for soldering the voice coil wire, the top of the magnetic circuit is provided with a supporting ring 8, the top of the supporting ring 8 is installed with a diaphragm 5, the edge between the diaphragm 5 and the shell 1 is installed with a limiting ring 6, the bottom of the diaphragm 5 is supported by the supporting ring 8, and the top of the diaphragm 5 is limited by the limiting ring 6 to fix the diaphragm 5. The central part of the diaphragm 5 has an inner recess structure bonded with a voice coil 7 connected with the solder pad 4 through a lead wire, the voice coil 7 is a flat annular shape, bonded on the diaphragm 5, placed above the gap between the inner magnet 9 and the outer magnet 10. The thickness of the voice coil 7 is between 0.05-0.3mm, and the width of the voice coil 7 is greater than 0.3mm. The voice coil 7 is composed of copper wire, copper-clad aluminum or aluminum wire and other good conductive materials.
[0022] The diaphragm 5 is composed of a suspension edge with a folded ring and a flat ball top, the folded ring is made of one or more composite materials such as PU, TPEE or PEEK and PET, and the ball top is a flat structure composed of rigid material.
[0023] The diaphragm 5 can also be bonded with a voice coil on the top and bottom, showing a double voice coil structure, so that the number of loudspeaker coils is doubled, and the sensitivity can be improved by 3dB.
[0024] The length of the protrusion 3 protruding outward from the shell 1 is 0.5mm, which is convenient for bonding PCB hard board or FPC soft board.
[0025] The material of the Huasi 2 is SPCC or SPCE magnetic conductive material, and the thickness is between 0.1-0.4mm. The main function is to guide the magnetic field at the bottom of the inner magnet 9 and the outer magnet 10 to the top of the magnet through the Huasi 2, increasing the efficiency of the voice coil 7 in the magnetic field. The Huasi 2 is embedded in the bottom of the shell 1, which does not occupy the height space.
[0026] Example 2, please refer to Figure 5 The difference between this embodiment and example 1 is that the shell 1 of this embodiment has a step, no limiting ring 6 is arranged, the central plane of the bottom of the diaphragm 5 is bonded with a voice coil 7, the diaphragm 5 is arranged between the step and the supporting ring 8, and the diaphragm 5 is limited by the supporting ring 8 at the bottom of the diaphragm 5 and the step.
[0027] Figure 4 And Figure 5 The dotted line in and represents the magnetic force line from the N pole in the middle of the magnet to the external S pole.
[0028] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.
Claims
1. A flat panel loudspeaker of the external pad type comprising a housing (1), characterized in that, The inside of the shell (1) is provided with a magnetic circuit, the bottom of which is bonded with a Huasi (2) having a rectangular protrusion (3) extending outwards from the slot hole on the side of the shell (1), a solder pad (4) being mounted on the protrusion (3), the top of the magnetic circuit being provided with a support ring (8), the top of the support ring (8) being mounted with a diaphragm (5).
2. A plate loudspeaker with external terminals according to claim 1, characterized in that A limiting ring (6) is mounted between the edge of the diaphragm (5) and the shell (1).
3. A plate loudspeaker with external terminals according to claim 1, characterized in that The central part of the diaphragm (5) has an inner recess structure in which a voice coil (7) is bonded, the voice coil (7) being connected to the solder pad (4) through a lead wire.
4. The externally pad planar horn according to claim 1, wherein, The bottom central plane of the diaphragm (5) is bonded with the voice coil (7).
5. The externally pad planar horn according to claim 1, wherein, The protrusion (3) protrudes outwards from the shell (1) by a length of 0.5 mm.
6. A plate loudspeaker with external terminals according to claim 1, characterized in that The shell (1) has a step, and the diaphragm (5) is arranged between the step and the support ring (8).
7. The externally pad planar horn according to claim 1, wherein The magnetic circuit comprises an inner magnet (9) and an outer magnet (10), the inner magnet (9) being arranged in the center of the outer magnet (10).