Concentricity detection jig for voice coil and voice diaphragm assembly

Abstract

The concentricity detection jig for the voice coil and voice diaphragm assembly comprises an outer ring and an inner ring which are concentrically arranged, a plurality of connecting parts are uniformly connected between the inner ring of the outer ring and the outer ring of the inner ring, and a circular embedding groove is formed in the inner edge of the top of the outer ring by taking the center of the outer ring as the circle center. The circular embedding groove is arranged to be in clearance fit with the annular base plate, the inner ring of the inner ring is in clearance fit with the voice coil framework, during detection, the annular base plate of the voice coil and voice diaphragm assembly is arranged in the circular embedding groove, the framework is arranged in the inner ring of the inner ring, and the framework rotates in the inner ring by driving the annular base plate to rotate on the circular embedding groove. If the framework interferes with the inner wall of the inner ring in the rotating process, the concentricity of the annular chassis and the framework is unqualified; and if the framework does not interfere with the inner wall of the inner ring in the rotating process, the concentricity of the annular chassis and the framework is qualified. The structure is simple, the concentricity detection process can be simplified, and the detection efficiency and the detection accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of production jigs for voice coil and sound membrane components, in particular to a concentricity detection jig for voice coil and sound membrane components. Background Art

[0002] The voice coil is a coil through which current passes. It is an important part of the mechanical wave system of an electrodynamic speaker and can be said to be the heart of the speaker. Figure 4 As shown, it is a voice coil and membrane assembly 4 on the market, which is composed of a composite membrane 40 and a voice coil 41. The composite membrane 40 includes an annular chassis 400 and a tympanic membrane body 401. The voice coil 41 includes a skeleton 410, a coil, and a lead 411 connected to the two lead ends of the coil. During assembly, it is necessary to bond the skeleton 410 and the lead 411 to the bottom of the tympanic membrane body 401, and then bond the tympanic membrane body 401 to the top center of the annular chassis 400, and then bond the two leads 411 to the top of the annular chassis 400. During the production process, it is necessary to detect the assembly concentricity of the annular chassis 400 and the skeleton 410 to prevent the outflow of products with unqualified concentricity. At present, the concentricity of the voice coil and membrane assembly 4 is measured by a projector. This method has a cumbersome operation process, low detection efficiency, and large measurement error. Summary of the invention

[0003] The problem to be solved by the utility model is to provide a concentricity detection fixture for a voice coil and membrane assembly to improve detection efficiency and detection accuracy.

[0004] To solve the above technical problems, a concentricity detection fixture for a voice coil and sound membrane assembly is provided in accordance with the utility model, comprising an outer ring and an inner ring arranged concentrically, a plurality of connecting parts are evenly connected between the inner ring of the outer ring and the outer ring of the inner ring, and a circular interlocking groove is arranged on the inner edge of the top of the outer ring with its center as the center of the circle.

[0005] Preferably, two longitudinal sections are symmetrically arranged on the outer side wall of the outer ring, and the longitudinal sections intersect with the circular fitting groove.

[0006] Preferably, the top end surface of the inner ring is lower than the bottom end surface of the circular fitting groove.

[0007] The beneficial effects of the utility model are as follows: the utility model provides a concentricity detection jig for a voice coil and sound membrane assembly. The circular interlocking groove should be set to match the gap with the annular chassis, and the inner ring of the inner ring matches the gap with the voice coil frame. During the detection, the annular chassis of the voice coil and sound membrane assembly is placed in the circular interlocking groove, and the frame is placed in the inner ring of the inner ring. By driving the annular chassis to rotate on the circular interlocking groove, the frame will rotate in the inner ring. If there is interference between the frame and the inner wall of the inner ring during the rotation, it indicates that the concentricity of the annular chassis and the frame is unqualified; if there is no interference between the frame and the inner wall of the inner ring during the rotation, it indicates that the concentricity of the annular chassis and the frame is qualified. Its structure is simple, which can simplify the concentricity detection process and improve the detection efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The schematic diagram of the appearance structure of the utility model is illustrated.

[0009] Figure 2 The cross-sectional view illustrates the use effect of the detection fixture and the voice coil and membrane assembly of the utility model.

[0010] Figure 3 The top view of the use effect of the detection fixture and the voice coil and membrane assembly of the utility model is illustrated.

[0011] Figure 4 The schematic diagram of the appearance structure of the voice coil and membrane assembly of the utility model is illustrated.

[0012] Explanation of the accompanying drawings: outer ring 1, circular fitting groove 10, longitudinal section 11, inner ring 2, connecting part 3, voice coil and membrane assembly 4, composite sound membrane 40, annular chassis 400, eardrum body 401, voice coil 41, skeleton 410, lead wire 411. DETAILED DESCRIPTION

[0013] To make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments.

[0014] Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present disclosure.

[0015] refer to Figure 1-Figure 4 .

[0016] The utility model provides a concentricity detection jig for a voice coil and a voice membrane assembly, comprising an outer ring 1 and an inner ring 2 which are concentrically arranged, a plurality of connecting parts 3 are evenly connected between the inner ring of the outer ring 1 and the outer ring of the inner ring 2, and a circular interlocking groove 10 is arranged on the inner edge of the top of the outer ring 1 with its center as the center of the circle.

[0017] The specific use principle is that the circular interlocking groove 10 should be set to have a clearance fit with the annular chassis 400, and the inner ring of the inner ring 2 should have a clearance fit with the skeleton 410. During the test, the annular chassis 400 of the voice coil and membrane assembly 4 is placed in the circular interlocking groove 10, and the skeleton 410 is placed in the inner ring of the inner ring 2. By driving the annular chassis 400 to rotate on the circular interlocking groove 10, the skeleton 410 will rotate in the inner ring 2. If there is interference between the skeleton 410 and the inner wall of the inner ring 2 during the rotation process, it indicates that the concentricity of the annular chassis 400 and the skeleton 410 is unqualified; if there is no interference between the skeleton 410 and the inner wall of the inner ring 2 during the rotation process, it indicates that the concentricity of the annular chassis 400 and the skeleton 410 is qualified. Its structure is simple, which can simplify the concentricity detection process and improve the detection efficiency and accuracy.

[0018] Based on the above embodiment, two longitudinal sections 11 are symmetrically arranged on the outer wall of the outer ring 1, and the longitudinal sections 11 intersect with the circular fitting groove 10. When the annular chassis 400 is placed in the circular fitting groove 10, the two sides of the annular chassis 400 can be exposed outside the longitudinal sections 11, so that the operator can pinch the two sides of the outer edge of the annular chassis 400 to drive the annular chassis 400 to rotate in the circular fitting groove 10 to detect the concentricity.

[0019] Based on the above embodiment, the top end surface of the inner ring 2 is lower than the bottom end surface of the circular interlocking groove 10, thereby preventing the bottom surface of the annular chassis 400 from contacting the top surface of the inner ring 2 when rotating in the circular interlocking groove 10, reducing the rotation resistance of the annular chassis 400 and reducing the wear of the annular chassis 400.

[0020] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A concentricity detection fixture for a voice coil and membrane assembly, characterized in that: It comprises an outer ring and an inner ring which are arranged concentrically, a plurality of connecting parts are evenly connected between the inner ring of the outer ring and the outer ring of the inner ring, and a circular fitting groove is arranged on the inner edge of the top of the outer ring with its center as the center of the circle.

2. The concentricity detection jig of the voice coil and membrane assembly according to claim 1 is characterized in that: Two longitudinal sections are symmetrically arranged on the outer side wall of the outer ring, and the longitudinal sections intersect with the circular fitting groove.

3. The concentricity detection jig of the voice coil and membrane assembly according to claim 2 is characterized in that: The top end surface of the inner ring is lower than the bottom end surface of the circular fitting groove.

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