A speaker sound film combination fixture

Abstract

The utility model discloses a speaker sound diaphragm combination jig, comprising a jig upper mold for positioning a voice coil and a jig lower mold for positioning a diaphragm, the jig upper mold is detachably assembled on the jig lower mold, the jig lower mold is provided with a positioning cavity for positioning the diaphragm; the jig upper mold is provided with a positioning hole for positioning the voice coil, the positioning hole runs through the upper and lower ends of the jig upper mold, the jig upper mold is provided with an avoidance groove, and the avoidance groove is connected to the positioning hole; thereby, it avoids many disadvantages of traditional processes, effectively reduces the occurrence of various defects, while ensuring product yield, it also simultaneously improves production efficiency, reduces the difficulty of jig manufacturing, and can also improve work efficiency, saving costs from many aspects.

Description

Technical Field

[0001] The utility model relates to the technology of speaker sound film combination field, in particular to a speaker sound film combination fixture. Background Art

[0002] Sound is produced by vibration. The vibration medium of the speaker is the diaphragm. The driving force is the voice coil. The magnet provides a permanent magnetic field. When the alternating current passes through the voice coil in the magnetic field, it will produce reciprocating motion, thereby driving the diaphragm to reciprocate. The reciprocating motion of the diaphragm drives the reciprocating motion of the air, which is transmitted to the eardrum of the ear, so as to perceive the sound. The headphones can listen to beautiful music because there are high-quality speaker units inside the headphones. There are many factors that affect the quality of the unit. The voice coil and diaphragm are one of the most critical components for the speaker unit to produce good quality.

[0003] The ideal vibration state of the speaker diaphragm: the diaphragm should start immediately when the voice coil starts, and when the voice coil stops moving without audio current flowing, the diaphragm should also stop immediately. Since the main function of the diaphragm is vibration, the performance of vibration dynamics is affected by elasticity and inertia. A diaphragm with sufficient rigidity and linear elasticity must have better vibration dynamics, can reasonably restore / playback sound signals, and its audio performance will be balanced. A light diaphragm must have a smaller movement inertia, so the clarity / details of its sound will be very good.

[0004] In addition to the rigidity and elasticity of the diaphragm itself, the driving force generated by the up and down movement of the voice coil is also extremely important. If the kinetic energy emitted by the voice coil cannot be completely and consistently transmitted to the entire diaphragm, although the diaphragm has good damping properties, it cannot make a perfect piston movement after all, so the distortion rate is relatively increased. In terms of listening, there will be obvious problems of poor resolution and insufficient dynamics, and there will also be delays and poor connections from mid-frequency to high frequency.

[0005] In order to ensure that the entire vibration system of the speaker is in the best state during movement, the voice coil and diaphragm combination becomes the top priority in the speaker production process. The current process of voice coil and diaphragm combination is basically based on glue bonding. A circle of glue is applied to the diaphragm voice coil position, and the voice coil is installed to ensure that the voice coil and diaphragm are concentric and fit in place as much as possible. After all, the voice coil wire is not integrated with the diaphragm itself. If it is not fixed well, collision with each other will cause noise, change the frequency response characteristics, and even the entire acoustic performance.

[0006] The voice coil and diaphragm combination, referred to as the voice diaphragm combination, is mainly completed by using a jig. The focus of the jig is to ensure that the voice coil and diaphragm combination are concentric and that the glue between the two is fully bonded, such as Figure 1 and Figure 2 As shown, the general process steps are as follows:

[0007] 1. Prepare the glue and debug the glue coating machine;

[0008] 2. Take the voice coil 1 and insert it concentrically into the upper mold 2 of the jig;

[0009] 3. Take the diaphragm 3 and put it concentrically into the lower mold 4 of the jig;

[0010] Fourth, place the lower mold 4 of the jig with the diaphragm 3 on the workbench of the glue coating machine, and use the glue coating machine to apply a circle of glue on the voice coil of the diaphragm 3;

[0011] 5. Take the jig upper mold 2 with the voice coil 1, and combine it concentrically with the jig lower mold 4. Note: When assembling, the voice coil lead should be aligned with the jig lower mold 4 and placed in the sink 5 to prevent the jig from breaking or damaging the lead;

[0012] 6. Remove the entire fixture assembly from the glue coating machine and wait for the glue on the sound film assembly to dry;

[0013] 7. After drying, remove the upper mold of the jig first;

[0014] 8. Take out the completed voice coil assembly in the lower mold of the fixture to complete the entire assembly process.

[0015] The above process has many drawbacks, mainly focusing on the design limitations of the jig upper mold, as follows: 1. The inner diameter of the voice coil needs to be sleeved on the outer diameter of the clamping position of the jig upper mold, which has very high requirements for the jig precision; the inner diameter of the voice coil is inserted into the jig upper mold, and the jig needs to be reversed during operation, with the voice coil facing down, to facilitate the upper and lower assembly of the jig upper and lower molds in the next step. If the clamping position and the voice coil are too loose, the voice coil will easily fall off the jig; if it is too tight, the problem is more serious. On the one hand, the voice coil cannot be installed in place, and the horizontal contact and concentricity of the voice coil with the diaphragm cannot be guaranteed, which will affect the glue bonding and acoustic properties, including life tests; on the other hand, the diaphragm material is thin and soft, and it is easy to be damaged. The ideal assembly is that the voice coil does not press on the diaphragm, and the distance is close to zero. If the voice coil is not installed in place, the protruding part will inevitably squeeze onto the diaphragm, causing the diaphragm to distort and deform. After the glue between the two dries, the deformed part of the diaphragm will not be able to recover, which will seriously affect the acoustic characteristics of the speaker, resulting in disadvantages such as a discount in the frequency response curve and increased distortion.

[0016] 2. The voice coil jig has an upper and lower die assembly, and the voice coil lead is between the jigs. If the employee does not operate properly and the lead is not placed in the jig lower die sink, it is easy to squeeze it when the jig is assembled, causing damage to the lead or breaking it. The jigs are mostly made of metal materials such as brass or aluminum alloy, and the lead is almost always copper enameled wire or copper-clad aluminum enameled wire at the millimeter level, so this risk is extremely high, which is also one of the biggest problems in the current speaker production.

[0017] 3. The assembly of the sound membrane is basically the most difficult process in the entire speaker production. Since the material is easily damaged and has a large loss, this series of workstations are generally equipped with skilled employees, who work gently and carefully. Utility Model Content

[0018] In view of this, the utility model aims to solve the deficiencies in the prior art, and its main purpose is to provide a speaker sound membrane combination jig, which avoids many disadvantages of traditional processes, effectively reduces various defects, and while ensuring product yield, also simultaneously improves production efficiency, reduces the difficulty of jig production, and can also improve work efficiency, saving costs in many aspects.

[0019] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0020] A speaker sound diaphragm combination jig comprises an upper jig mold for positioning a voice coil and a lower jig mold for positioning a diaphragm, wherein the upper jig mold is detachably assembled on the lower jig mold, and the lower jig mold is provided with a positioning cavity for positioning the diaphragm; the upper jig mold is provided with a positioning hole for positioning the voice coil, the positioning hole passes through the upper and lower ends of the upper jig mold, and the upper jig mold is provided with an avoidance groove, which is connected to the positioning hole.

[0021] As a preferred solution, the upper surface of the upper die of the jig is provided with a clearance hole recessed downward, and the positioning hole is connected to the clearance hole.

[0022] As a preferred solution, the axes of the clearance hole and the positioning hole coincide with each other, the clearance hole is gradually reduced from top to bottom, the positioning hole is cylindrical, and the minimum inner diameter of the clearance hole is equal to the inner diameter of the positioning hole.

[0023] As a preferred solution, the avoidance groove is connected to the clearance hole, the avoidance groove extends radially outward from the inner side wall of the clearance hole, and the avoidance groove passes through the upper and lower ends of the upper mold of the jig.

[0024] As a preferred solution, the axes of the positioning cavity, the positioning hole and the clearance hole coincide with each other.

[0025] As a preferred solution, the height of the positioning hole in the up and down direction is smaller than the height of the voice coil.

[0026] As a preferred solution, the upper end of the jig lower mold is provided with an annular limiting step protruding upward on the periphery of the positioning cavity, and the periphery of the lower end of the jig upper mold is provided with an annular limiting groove, and the annular limiting step is positioned in the annular limiting groove.

[0027] As a preferred solution, the height of the annular limiting groove in the up and down directions is smaller than the height of the annular limiting step.

[0028] As a preferred solution, the lower mold of the jig has a through hole; the lower surface of the through hole of the lower mold of the jig is concave upward and connected to the positioning cavity; the through hole coincides with the axis of the positioning cavity.

[0029] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it mainly arranges a positioning hole for positioning the voice coil on the upper mold of the jig, so that the positioning hole passes through the upper and lower ends of the upper mold of the jig, and the upper mold of the jig is provided with an avoidance groove, which is connected to the positioning hole. In this way, the inner diameter of the positioning hole can be used to position the voice coil, so that the cumbersome and careful operation of the voice coil in the jig can be avoided as much as possible in the combination process, that is, there is no need to worry about the voice coil falling off the upper mold of the jig, and there is no need to worry about the influence of the upper and lower mold combination on the lead. The processing of the sink groove is omitted in the lower mold of the jig, which is equivalent to direct turning processing, and is completed in one time. There is no need to use a milling cutter to open symmetrical sink grooves on both sides of the jig. In this way, many disadvantages of traditional processes are avoided, various defects are effectively reduced, and while ensuring product yield, production efficiency is also improved simultaneously, the difficulty of jig manufacturing is reduced, and work efficiency can also be improved, saving costs from many aspects.

[0030] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an exploded schematic diagram of the voice coil diaphragm combination structure of the prior art;

[0032] Figure 2 It is a schematic diagram of the assembly of the voice coil and diaphragm combination structure of the prior art;

[0033] Figure 3 It is a schematic cross-sectional view of the combined structure of the sound film combined fixture of the embodiment of the utility model;

[0034] Figure 4 It is a top view of the combined structure of the sound film combined fixture of the embodiment of the utility model;

[0035] Figure 5 It is a schematic diagram of the combined structure of the sound film combined fixture of the embodiment of the utility model;

[0036] Figure 6 It is a top view of the upper mold of the sound film assembly jig of the embodiment of the utility model;

[0037] Figure 7 It is a top view of the lower mold of the sound film assembly jig of the embodiment of the utility model;

[0038] Figure 8 It is a schematic cross-sectional view of the overall structure of the sound membrane assembly fixture of an embodiment of the utility model.

[0039] Description of the accompanying drawings:

[0040] 10. Fixture upper mold 11. Positioning holes

[0041] 12. Avoidance slot 13. Make way hole

[0042] 14. Annular limit groove 20. Lower die of fixture

[0043] 21. Positioning cavity 22. Annular limiting step

[0044] 23, perforation 30, voice coil

[0045] 40. Diaphragm. DETAILED DESCRIPTION

[0046] Please refer to Figures 3 to 8 As shown, it shows the specific structure of an embodiment of the utility model.

[0047] like Figures 3 to 8 As shown, a speaker sound membrane assembly jig includes a jig upper mold 10 for positioning a voice coil 30 and a jig lower mold 20 for positioning a diaphragm 40, wherein the jig upper mold 10 is detachably assembled on the jig lower mold 20, and both the jig upper mold 10 and the jig lower mold 20 are cylindrical structures, and the jig lower mold 20 is provided with a positioning cavity 21 for positioning the diaphragm 40, and the shape of the positioning cavity 21 is consistent with the shape of the diaphragm 40; the jig upper mold 10 is provided with a positioning hole 11 for positioning the voice coil 30, so that the inner diameter of the positioning hole 11 can be used to position the voice coil 30, and the tolerance between the inner diameter of the positioning hole 11 and the outer diameter of the voice coil 30 can be controlled within 0.05 mm; the positioning hole 11 passes through the upper and lower ends of the jig upper mold 10, and the jig upper mold 10 is provided with a avoidance groove 12, and the avoidance groove 12 is connected to the positioning hole 11.

[0048] like Figures 3 to 6 As shown, the upper surface of the jig upper mold 10 is recessed downwardly with a clearance hole 13, and the positioning hole 11 is connected to the clearance hole 13. The axes of the positioning cavity 21, the positioning hole 11 and the clearance hole 13 coincide. The clearance hole 13 is gradually reduced from top to bottom, that is, the cross-section of the clearance hole 13 is conical, which is conducive to the voice coil 30 entering the positioning hole 11 from the clearance hole 13 more smoothly; the positioning hole 11 is cylindrical, and the minimum inner diameter of the clearance hole 13 is equal to the inner diameter of the positioning hole 11. Moreover, the avoidance slot 12 is connected to the clearance hole 13, and the avoidance slot 12 extends radially outward from the inner side wall of the clearance hole 13, and the avoidance slot 12 passes through the upper and lower ends of the jig upper mold 10.

[0049] like Figure 3 As shown, in this embodiment, the height of the positioning hole 11 in the up and down direction is smaller than the height of the voice coil 30; and the inner height L (including the height of the positioning hole 11) after the jig upper mold 10 and the jig lower mold 20 are molded together should be smaller than the actual height of the voice coil 30, and it is recommended to be controlled within 0.2mm, which is equivalent to the distance reserved for pressing the voice coil 30 exposed in the middle and outer sides of the jig upper mold 10 in the make way hole 13, and also avoids the phenomenon that too much reserved space may easily cause deformation of the voice coil 30.

[0050] like Figure 3 and Figure 5 As shown, the upper end of the jig lower die 20 is provided with an annular limiting step 22 protruding upward on the periphery of the positioning cavity 21, and the periphery of the lower end of the jig upper die 10 is provided with an annular limiting groove 14, and the annular limiting step 22 is positioned in the annular limiting groove 14. The height of the annular limiting groove 14 in the vertical direction is smaller than the height of the annular limiting step 22, so that when the jig upper die 10 is combined with the jig lower die 20, the bottom surface of the jig upper die 10 is pressed against the diaphragm 40.

[0051] like Figure 3 and Figure 4 As shown, the jig lower die 20 has a through hole 23 ; the through hole 23 is recessed upward from the lower surface of the jig lower die 20 and is connected to the positioning cavity 21 ; the through hole 23 coincides with the axis of the positioning cavity 21 .

[0052] The general combined process steps are as follows:

[0053] 1. Prepare the glue and debug the glue coating machine;

[0054] 2. Take the diaphragm 40 and put it concentrically into the lower mold 20 of the jig;

[0055] 3. Place the lower mold 20 of the jig with the diaphragm 40 on the workbench of the glue coating machine, and use the glue coating machine to apply a circle of glue on the voice coil 30 of the diaphragm 40;

[0056] 4. Take the jig upper die 10 and combine it concentrically with the jig lower die 20;

[0057] 5. Take the voice coil 30, align the lead wire with the avoidance notch 12 of the jig upper mold 10, and install the voice coil 30 concentrically from the avoidance hole 13 of the jig upper mold 10 through the positioning hole 11, and gently press the top of the voice coil 30 with the index finger wearing a finger glove for 1-2 seconds; gently press the voice coil 30, the glue can absorb the voice coil 30 by its own viscosity, and the voice coil 30 is fully wrapped by the glue. After the fingers are released, even if the short-term squeezing may cause slight deformation of the diaphragm 40, the diaphragm 40 can also use its own elasticity to complete the recovery of the deformed area after the fingers are released;

[0058] 6. Remove the entire fixture assembly from the glue coating machine and wait for the glue on the sound film assembly to dry;

[0059] 7. After drying, first remove the upper mold 10 of the jig;

[0060] 8. Take out the assembled voice coil 30 in the lower mold 20 of the jig to complete the entire assembly process.

[0061] It can be seen that the use of the speaker sound film assembly jig of the utility model avoids the cumbersome and careful operation of the voice coil 30 in the jig as much as possible in terms of technology, that is, there is no need to worry about the voice coil 30 falling off the jig upper mold 10, nor the influence of the jig upper and lower mold combination on the lead. Moreover, after applying glue, the jig upper and lower molds are directly combined, and the voice coil 30 is smoothly loaded from the clearance hole 13 and the positioning hole 11 of the jig upper mold 10, making the production of the entire sound film assembly as simple and foolproof as possible, that is, reducing the hidden dangers of various defects and improving production efficiency.

[0062] To sum up, the design focus of the utility model is that it mainly provides a positioning hole for positioning the voice coil on the upper mold of the jig, so that the positioning hole passes through the upper and lower ends of the upper mold of the jig, and the upper mold of the jig is provided with an avoidance groove, which is connected to the positioning hole. In this way, the inner diameter of the positioning hole can be used to position the voice coil, so that the cumbersome and careful operation of the voice coil in the jig can be avoided as much as possible in the combination process, that is, there is no need to worry about the voice coil falling off the upper mold of the jig, and there is no need to worry about the influence of the upper and lower mold combination on the lead. The jig lower mold omits the processing of the sink groove, which is equivalent to direct turning processing, and is completed in one time. There is no need to use a milling cutter to open symmetrical sink grooves on both sides of the jig. In this way, it avoids many disadvantages of traditional processes, effectively reduces various defects, and while ensuring product yield, it also simultaneously improves production efficiency, reduces the difficulty of jig manufacturing, and can also improve work efficiency, saving costs from many aspects.

Claims

1. A speaker sound diaphragm assembly jig, comprising an upper jig mold for positioning a voice coil and a lower jig mold for positioning a diaphragm, wherein the upper jig mold is detachably assembled on the lower jig mold, and the lower jig mold is provided with a positioning cavity for positioning the diaphragm; characterized in that: The jig upper mold is provided with a positioning hole for positioning the voice coil, the positioning hole passes through the upper and lower ends of the jig upper mold, and the jig upper mold is provided with a avoidance groove, which is connected to the positioning hole.

2. A speaker sound membrane assembly fixture according to claim 1, characterized in that: The upper surface of the upper die of the jig is concavely provided with a clearance hole, and the positioning hole is connected to the clearance hole.

3. A speaker sound membrane assembly fixture according to claim 2, characterized in that: The axes of the clearance hole and the positioning hole coincide with each other, the clearance hole is gradually reduced from top to bottom, the positioning hole is cylindrical, and the minimum inner diameter of the clearance hole is equal to the inner diameter of the positioning hole.

4. The speaker sound membrane assembly fixture according to claim 2, characterized in that: The avoidance slot is connected to the clearance hole, and the avoidance slot extends radially outward from the inner side wall of the clearance hole. The avoidance slot passes through the upper and lower ends of the upper die of the jig.

5. The speaker sound membrane assembly fixture according to claim 3, characterized in that: The axes of the positioning cavity, the positioning hole and the clearance hole coincide with each other.

6. The speaker sound membrane assembly fixture according to claim 1, characterized in that: The height of the positioning hole in the up-down direction is smaller than the height of the voice coil.

7. The speaker sound membrane assembly fixture according to claim 1, characterized in that: The upper end of the jig lower die is provided with an annular limiting step protruding upward on the periphery of the positioning cavity, and the peripheral edge of the lower end of the jig upper die is provided with an annular limiting groove, and the annular limiting step is positioned in the annular limiting groove.

8. The speaker sound membrane assembly fixture according to claim 7, characterized in that: The height of the annular limiting groove in the up-down direction is smaller than the height of the annular limiting step.

9. The speaker sound membrane assembly fixture according to claim 1, characterized in that: The lower die of the jig has a through hole; the lower surface of the lower die of the through hole is concave upward and connected to the positioning cavity; the through hole coincides with the axis of the positioning cavity.

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