Positioning jig and loudspeaker production line

Abstract

This application relates to a positioning fixture and a loudspeaker production line. The positioning fixture is used to position the voice coil and frame of a loudspeaker. The positioning fixture includes a base, a limiting member, and an adjusting member. The base includes a base plate and a first positioning part and a second positioning part disposed on the base plate. The second positioning part is used to position the frame. The limiting member includes a positioning sleeve and a protrusion. The positioning sleeve is installed on the first positioning part, and the positioning sleeve or the first positioning part is used to position the voice coil. The protrusion is movable relative to the base plate along the height direction of the base. The adjusting member is detachably installed on the base and located between the base plate and the protrusion. Along the height direction of the base, the adjusting member is used to limit the voice coil with the protrusion. The thickness of the adjusting member is adjustable to adjust the relative position of the voice coil and the frame. By providing a detachable adjusting member on the base, the voice coil is limited between the adjusting member and the protrusion. Changing the thickness of the adjusting member can adjust the position of the voice coil in the height direction, thereby adjusting the relative position of the voice coil and the frame.

Description

Technical Field

[0001] This application relates to the field of loudspeaker technology, and more particularly to a positioning fixture and a loudspeaker production line. Background Technology

[0002] The voice coil is a crucial component of a loudspeaker, used to convert electrical signals into mechanical vibrations, thereby producing sound. The position of the voice coil directly affects the uniformity and efficiency of the vibrations, influencing key performance indicators such as frequency response and distortion. Correct voice coil positioning ensures proper loudspeaker operation, improving acoustic performance and sound quality. Improper positioning leads to degraded sound quality and reduced efficiency. Currently, voice coil positioning in loudspeaker design is achieved using voice coil positioning fixtures and tone gauge fixtures.

[0003] During the speaker sample development stage, due to differences in materials, processes, and manufacturing procedures, the actual position of the voice coil in the height direction during the actual assembly of the speaker may differ from the design. The voice coil may shift upwards or downwards, resulting in an asymmetrical BL curve. This necessitates adjusting the position of the voice coil in the height direction. However, traditional voice coil positioning fixtures fix the position of the voice coil in the height direction when positioning it. If the relative position of the voice coil needs to be adjusted, the positioning fixture base needs to be remade. The positioning fixture base has a complex structure and is made of aluminum alloy, making it time-consuming and labor-intensive to manufacture. Utility Model Content

[0004] This application provides a positioning fixture that improves the adjustment flexibility of the positioning fixture, thereby at least partially solving the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a positioning fixture is provided for positioning the voice coil and frame of a loudspeaker, the positioning fixture comprising:

[0006] The base includes a base plate and a first positioning part and a second positioning part disposed on the base plate, wherein the second positioning part is used to position the basin stand.

[0007] The limiting component includes a positioning sleeve and a protrusion. The positioning sleeve is installed on the first positioning part. The positioning sleeve or the first positioning part is used to position the voice coil. The protrusion can move relative to the substrate along the height direction of the base.

[0008] An adjusting member is detachably mounted on the base body, located between the base plate and the protrusion, along the height direction of the base body. The adjusting member is used to limit the voice coil with the protrusion. The thickness of the adjusting member is adjustable to adjust the relative position of the voice coil and the frame.

[0009] Optionally, a groove is formed between the first positioning part and the second positioning part, and the adjusting member is disposed in the groove.

[0010] Optionally, the limiting member is at least partially disposed within the groove, and the bottom of the limiting member abuts against the top of the adjusting member.

[0011] Optionally, the inner peripheral side of the adjusting member abuts against the first positioning part, and the outer peripheral side of the adjusting member abuts against the second positioning part.

[0012] Optionally, both the first positioning part and the second positioning part are annular, and the second positioning part is coaxially surrounding the first positioning part.

[0013] Optionally, the base body is provided with a through hole along its axis, and the center lines of the through hole, the first positioning part, and the second positioning part coincide.

[0014] Optionally, the inner circumferential side of the voice coil fits against the outer circumferential side of the positioning sleeve, and a gap is provided between the voice coil and the second positioning part.

[0015] Optionally, the second positioning part includes a circumferential surface away from the positioning sleeve and a plane away from the substrate. The basin frame is provided with a radial positioning surface and an axial positioning surface. The radial positioning surface is in contact with the circumferential surface, and the axial positioning surface is in contact with the plane.

[0016] Optionally, the adjusting member comprises a plurality of stacked adjusting units, at least some of which are disposed between the substrate and the protrusion; or,

[0017] The adjustment component includes multiple adjustment units of different heights, and one of the multiple adjustment units is disposed between the substrate and the protrusion.

[0018] According to a second aspect of this application, a loudspeaker production line is provided, including the positioning fixture described above.

[0019] In the positioning fixture of this application embodiment, by providing a detachable adjusting member on the base, the voice coil is limited between the adjusting member and the protrusion. By changing the thickness of the adjusting member, the position of the voice coil in the height direction can be adjusted, thereby adjusting the relative position of the voice coil and the frame. There is no need to modify the base of the positioning fixture. Compared with the existing positioning fixture base, the adjusting member is easier to manufacture, thereby saving the development cost and time of the speaker sample and improving efficiency.

[0020] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0023] Figure 1 This is an internal sectional view of the positioning fixture provided in the exemplary embodiments of this disclosure, showing its application state.

[0024] Figure 2 yes Figure 1 The internal sectional view of the positioning fixture shown;

[0025] Figure 3 yes Figure 1 The exploded view of the positioning fixture shown is shown.

[0026] Figure 4 yes Figure 1 A three-dimensional view of the base body of the positioning fixture shown;

[0027] Figure 5 yes Figure 1 A partial cross-sectional view of the speaker frame shown;

[0028] Figure 6 yes Figure 1 A perspective view of the limiting component in the positioning fixture shown.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Base body; 11. Base plate; 12. First positioning part; 13. Second positioning part; 131. Circumferential surface; 132. Plane; 14. Groove; 15. Through hole;

[0031] 2. Limiting component; 21. Positioning sleeve; 22. Protrusion;

[0032] 3. Adjusting components; 31. Adjusting unit;

[0033] 4. Voice coil;

[0034] 5. Sink frame; 51. Radial positioning surface; 52. Axial positioning surface. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0036] According to the first aspect of this application, referring to Figures 1 to 3 A positioning fixture is provided for positioning the voice coil 4 and the frame 5 of a loudspeaker. The positioning fixture includes a base 1, a limiting member 2, and an adjusting member 3. The base 1 includes a base plate 11 and a first positioning part 12 and a second positioning part 13 disposed on the base plate 11. The second positioning part 13 is used to position the frame 5. The limiting member 2 includes a positioning sleeve 21 and a protrusion 22. The positioning sleeve 21 is installed on the first positioning part 12. The positioning sleeve 21 or the first positioning part 12 is used to position the voice coil 4. The protrusion 22 can move relative to the base plate 1 along the height direction of the base 1. The adjusting member 3 is detachably installed on the base 1 and is located between the base plate 11 and the protrusion 22. Along the height direction of the base 1, the adjusting member 3 is used to limit the voice coil 4 with the protrusion 22. The thickness of the adjusting member 3 is adjustable to adjust the relative position of the voice coil 4 and the frame 5.

[0037] Understandably, during the speaker prototype development stage, traditional voice coil positioning fixtures require adjusting the position of the voice coil 4 by re-fabricating a complex aluminum alloy base 1 due to the fixed height and position of the voice coil 4, which is time-consuming and labor-intensive. In this technical solution, the second positioning part 13 of the base 1 positions the frame 5, the positioning sleeve 21 of the limiting member 2 is installed on the first positioning part 12 to position the voice coil 4, the protrusion 22 can move along the height direction of the base 1, and the adjusting member 3 is detachably installed between the base plate 11 and the protrusion 22.

[0038] The BL curve is a crucial curve describing the force characteristics of the voice coil 4 in a magnetic field, representing the "force coefficient-displacement" relationship. The BL value (force coefficient) indicates the magnitude of the driving force on the voice coil 4 in the magnetic field, determined by the product of the magnetic flux density B (unit: Tesla) and the effective length L (unit: meter) of the voice coil 4 conductor (BL = B × L). When current flows through the voice coil 4, the BL value directly determines the driving force of the diaphragm, thus affecting the sound output. Ideally, when the voice coil 4 is located at the center of the magnetic gap, the magnetic field distribution is uniform, and the BL value does not change with the displacement of the voice coil 4. In this case, the BL curve is a horizontal line, indicating a linear relationship between the driving force and the current, resulting in minimal speaker distortion. However, in reality, the magnetic field within the magnetic gap is not absolutely uniform, and the displacement of the voice coil 4 causes fluctuations in the BL value, forming a curve. If the BL curve is asymmetrical (e.g., a large difference in BL value between positive and negative strokes), it will cause uneven force on the voice coil 4 during vibration, deviating the diaphragm's motion from linearity and inducing harmonic distortion. Therefore, the symmetry of the BL curve is an important indicator of speaker linearity, and optimizing its shape is key to improving sound quality.

[0039] The position of the speaker's voice coil 4 in the magnetic field directly affects the symmetry of the BL curve (force coefficient curve). When the voice coil 4 is offset in the height direction, the effective length of the magnetic field lines it cuts in the magnetic gap will change due to the uneven distribution of the magnetic field. If the voice coil 4 deviates from the center of the magnetic gap, the magnetic flux density B in the area it is in when vibrating upwards or downwards will be different, resulting in an asymmetry of the BL value in the positive and negative strokes. This, in turn, causes an imbalance in the linear relationship between current input and diaphragm displacement, leading to harmonic distortion. By precisely adjusting the height of the voice coil 4 through the adjusting component 3, so that it returns to the center area of ​​the magnetic field distribution in the magnetic gap, the magnetic field line density cut by the voice coil 4 when vibrating up and down tends to be consistent, and the symmetry of the positive and negative strokes of the BL curve is significantly improved. At this time, the force on the voice coil 4 and the current input present a more ideal linear relationship, the diaphragm motion distortion is greatly reduced, and the nonlinear distortion (such as second and third harmonic distortion) of the speaker in the full frequency range output is reduced accordingly, ultimately achieving an improvement in sound purity and fidelity.

[0040] By changing the thickness of the adjusting component 3, the protrusion 22 and the voice coil 4 can be moved along the height direction, thereby adjusting the relative position of the voice coil 4 and the frame 5. By setting a detachable and thickness-adjustable adjusting component 3, the height position of the voice coil 4 can be adjusted simply by replacing the adjusting component 3 without modifying the positioning fixture body 1. This solves the problem of having to remake the body 1 in traditional fixtures, saving speaker sample development costs and time, and improving development efficiency.

[0041] In practical applications, the detachable connection methods for the adjusting component 3 in the positioning fixture include, but are not limited to, threaded connections, snap-fit ​​connections, and magnetic connections. Threaded connections are achieved by setting internal and external threads on the base 1 and the adjusting component 3, and the threads are self-locking, ensuring a stable and adjustable connection. Snap-fit ​​connections are achieved by setting a convex-concave fit structure on the base 1 and the adjusting component 3, facilitating the installation and removal of the adjusting component 3 and providing stable positioning. Magnetic connections utilize permanent magnets on the base 1 and the adjusting component 3, with opposite magnetic poles facing each other, fixing the adjusting component 3 through magnetic attraction. This method has low tolerance requirements during installation, a simple structure, and convenient disassembly. In practical applications, the specific connection method can be flexibly selected based on the material of the adjusting component 3, the required positioning accuracy, and the adjustment frequency.

[0042] In some examples, the base 1 is made of aluminum alloy, while the adjusting component 3 is made of plastic. The base 1 is made of aluminum alloy, which has high hardness and strength, and is not easily deformed. This ensures the stability of key structures such as the first positioning part 12 and the second positioning part 13, thereby maintaining the accuracy of the positioning of the voice coil 4 and the frame 5, preventing assembly errors caused by deformation of the base 1, and improving the consistency and reliability of the speaker's acoustic performance. At the same time, aluminum alloy has good wear resistance, ensuring the service life of the base 1 and reducing equipment maintenance and replacement costs. The adjusting component 3 is made of plastic, taking advantage of its simple molding process. Adjusting units 31 of different thicknesses and specifications can be quickly produced through injection molding and other methods, significantly shortening the processing cycle and reducing mold complexity and manufacturing costs. Furthermore, plastic is lightweight and not prone to rust, facilitating the disassembly and replacement of the adjusting component 3. This satisfies the need for flexible adjustment of the relative positions of the voice coil 4 and the frame 5 while also considering economy and practicality.

[0043] Reference Figure 2 In some embodiments, a groove 14 is formed between the first positioning part 12 and the second positioning part 13, and the adjusting member 3 is disposed in the groove 14.

[0044] Understandably, in loudspeaker assembly, the frame 5 is fixed to the base 1 via the second positioning part 13, and its position is relatively stable. The groove 14 between the first positioning part 12 and the second positioning part 13 provides a longitudinally extending installation space for the voice coil 4 and the adjusting member 3. When the thickness of the adjusting member 3 is changed, the voice coil 4 moves along the height direction of the base 1. Since the position of the frame 5 is fixed, the position of the voice coil 4 relative to the frame 5 can have a large adjustment range. At the same time, the groove 14 provides an installation area for the adjusting member 3, making the assembly structure of the adjusting member 3 and the base 1 more compact. Simultaneously, the physical boundary of the groove 14 restricts the radial movement of the adjusting member 3, ensuring the stability of the adjusting member 3 during height adjustment. Thus, this design, through the cooperation of the groove 14 and the adjusting member 3, achieves a large range of relative position adjustment of the voice coil 4 relative to the frame 5 while ensuring positioning accuracy. This allows for the adaptation of the assembly requirements of the voice coil 4 and frame 5 in different loudspeaker models, improving the versatility and adjustment flexibility of the positioning fixture.

[0045] Reference Figure 1 and Figure 6 In some embodiments, the distance from the side of the first positioning part 12 away from the substrate 11 to the substrate 11 is greater than the distance from the side of the second positioning part 13 away from the substrate 11 to the substrate 11.

[0046] Understandably, the height of the first positioning part 12 is higher than that of the second positioning part 13, giving the first positioning part 12 a higher positioning height. On the one hand, this provides a more stable axial support reference for the voice coil 4, ensuring the radial installation accuracy of the voice coil 4. On the other hand, the higher first positioning part 12 provides ample space for the adjusting member 3. By increasing or decreasing the thickness of the adjusting member 3, the voice coil 4 can achieve a wider height adjustment range, thus flexibly adapting to the relative position requirements of the voice coil 4 and the frame 5 in different types of loudspeakers. This ensures the stability of the positioning reference and improves the adaptability of the fixture to diverse products.

[0047] Reference Figure 1 and Figure 2 In some embodiments, the limiting member 2 is at least partially disposed within the groove 14, and the bottom of the limiting member 2 abuts against the top of the adjusting member 3.

[0048] Understandably, the groove 14 provides precise guidance and limiting space for the limiting member 2. When the thickness of the adjusting member 3 changes, the limiting member 2 moves smoothly within the groove 14 along the height direction of the seat 1, preventing the voice coil 4 from becoming misaligned due to offset, and ensuring the accuracy of the relative position adjustment between the voice coil 4 and the frame 5. In addition, the abutting fit between the limiting member 2 and the adjusting member 3 allows changes in the thickness of the adjusting member 3 to directly change the relative position between the limiting member 2 and the base plate 11, causing the voice coil 4 to produce a corresponding displacement, ensuring the effectiveness of the adjustment. Furthermore, the fit between the limiting member 2 and the groove 14 makes the overall structure of the positioning fixture more compact.

[0049] Reference Figure 1 and Figure 2 In some embodiments, the inner peripheral side of the adjusting member 3 abuts against the first positioning part 12, and the outer peripheral side of the adjusting member 3 abuts against the second positioning part 13.

[0050] It is understandable that the inner circumference of the adjusting member 3 abuts against the first positioning part 12 and the outer circumference abuts against the second positioning part 13, so that the adjusting member 3 abuts against both sides of the radial direction in both directions. The two-way abutment provides multi-directional limiting support for the adjusting member 3, so that when it is subjected to force in the height direction, it can effectively suppress lateral displacement and shaking, and ensure that the adjusting member 3 remains stable during the thickness adjustment process, thereby making the position adjustment of the voice coil 4 more accurate.

[0051] Reference Figure 3 and Figure 4 In some embodiments, the first positioning part 12 and the second positioning part 13 are both annular, and the second positioning part 13 is coaxially surrounded by the first positioning part 12.

[0052] Understandably, in the positioning and assembly of the speaker voice coil 4 and the frame 5, their coaxiality and relative positional accuracy directly affect the speaker's acoustic performance. Both the first positioning part 12 and the second positioning part 13 adopt an annular structure, with the second positioning part 13 coaxially surrounding the first positioning part 12. This annular structure provides a uniform and symmetrical support and limiting surface, ensuring that the voice coil 4 and the frame 5 are subjected to uniform force, effectively preventing deformation or installation deviations caused by uneven local force, and ensuring that the voice coil 4 and the frame 5 maintain good shape and positional accuracy during positioning. Furthermore, the coaxial arrangement of the first positioning part 12 and the second positioning part 13 guarantees the coaxiality of the voice coil 4 and the frame 5, simplifying the adjustment process and reducing the risk of coaxiality errors affecting speaker sound quality. In addition, this ring-shaped coaxial structure is more compact and reasonable in terms of space utilization. It can make full use of the plane 132 area of ​​the base 1, so that the positioning fixture can achieve stable and accurate positioning function in a limited space. At the same time, it provides installation space for the adjustment component 3 and the limiting component 2, which facilitates the subsequent adjustment of the relative position of the voice coil 4 and the frame 5. This improves the overall assembly efficiency and versatility of the positioning fixture and can better adapt to the production needs of speakers of different specifications.

[0053] Reference Figure 1 and Figure 4 In some embodiments, the base 1 is provided with a through hole 15 along its axis, and the center lines of the through hole 15, the first positioning part 12 and the second positioning part 13 coincide.

[0054] Understandably, the through hole 15 runs along the axis of the base 1, forming a physical reference line that coincides with the center lines of the voice coil 4 and the frame 5. When the voice coil 4 is installed at the axis position of the through hole 15 through the positioning sleeve 21, and the frame 5 is coaxially fixed around the through hole 15 through the second positioning part 13, the axis of the through hole 15 can serve as the coaxiality reference for the assembly of the two, structurally ensuring the coaxiality of the center lines of the voice coil 4 and the frame 5, and reducing the acoustic performance degradation caused by reference offset. Secondly, the through hole 15 can serve as a routing channel for components such as cables and pipes. When the positioning fixture is used in conjunction with automated equipment, it can make the internal wiring layout more regular, reduce the risk of external entanglement and interference, and enhance the applicability of the fixture in automated production lines. Furthermore, the presence of the through hole 15 can reduce the overall weight of the base 1, reduce material costs and handling difficulties.

[0055] Reference Figure 1 In some embodiments, the inner circumferential side of the voice coil 4 is fitted with the outer circumferential side of the positioning sleeve 21, and a gap is provided between the voice coil 4 and the second positioning part 13.

[0056] Understandably, the inner circumference of the voice coil 4 fits snugly against the outer circumference of the positioning sleeve 21, providing stable and precise radial positioning for the voice coil 4, limiting its horizontal displacement, ensuring the accuracy of its position, guaranteeing the coaxiality of the voice coil 4 and the frame 5, and facilitating relative position adjustment in the height direction. Simultaneously, a gap is provided between the voice coil 4 and the second positioning part 13 to prevent contact between them from causing adjustment interference. This allows the voice coil 4 to adjust its relative position to the frame 5 more flexibly, improving the adjustment freedom of the positioning fixture, and preventing the second positioning part 13 from squeezing the voice coil 4, causing deformation or damage, thus protecting the structural integrity of the voice coil 4.

[0057] Reference Figure 1 , Figure 4 and Figure 5 In some embodiments, the second positioning part 13 includes a circumferential surface 131 away from the positioning sleeve 21 and a plane 132 away from the substrate 11. The basin frame 5 is provided with a radial positioning surface 51 and an axial positioning surface 52. The radial positioning surface 51 is in contact with the circumferential surface 131, and the axial positioning surface 52 is in contact with the plane 132.

[0058] Understandably, precise positioning of the speaker frame 5 is crucial to ensuring the accurate relative position of the voice coil 4 and the speaker frame 5 during speaker assembly. On one hand, the contact between the circumferential surface 131 and the radial positioning surface 51 precisely limits the horizontal positioning of the speaker frame 5, effectively constraining its radial displacement and ensuring its accurate circumferential position. On the other hand, the contact between the plane 132 and the axial positioning surface 52 provides stable axial support for the speaker frame 5, preventing vertical displacement or wobbling and ensuring the stability of the frame 5 installation. The multi-directional radial and axial positioning of the speaker frame 5 by the second positioning part 13 ensures its positional stability, providing a stable and reliable foundation for subsequent adjustments to the relative position of the voice coil 4 and the speaker frame 5. This effectively improves the precision and efficiency of speaker assembly, ensuring product consistency and stability.

[0059] Reference Figure 1 and Figure 6 In some embodiments, the adjusting member 3 includes a plurality of stacked adjusting units 31, at least some of which are disposed between the substrate 11 and the protrusion 22; or,

[0060] The adjustment component 3 includes multiple adjustment units 31 of different heights, and one of the multiple adjustment units 31 is disposed between the substrate 11 and the protrusion 22.

[0061] It is understandable that when the adjusting component 3 is composed of multiple stacked adjusting units 31, fine adjustments to the relative position of the voice coil 4 and the frame 5 can be achieved by increasing or decreasing the number of adjusting units 31 or changing the stacking combination, meeting the adjustment requirements under different precision requirements. This allows for the accumulation of minute thickness changes to achieve the desired height adjustment. For example, the adjusting component 3 can be composed of multiple adjusting units 31 of the same or different thicknesses stacked together. When it is necessary to increase the height of the voice coil 4, one or more adjusting units 31 can be stacked between the base plate 11 and the protrusion 22; conversely, reducing the number of stacked units shortens the spacing.

[0062] When the adjustment component 3 is selected from multiple adjustment units 31 of different heights, the adjustment unit 31 of the corresponding thickness can be quickly replaced according to actual needs, so as to quickly adjust the position of the voice coil 4 and greatly shorten the debugging time. For example, for different models of loudspeakers, adjustment units 31 of various thicknesses can be prefabricated, and the corresponding unit can be selected and installed between the base plate 11 and the protrusion 22 to adjust the relative position of the voice coil 4 and the frame 5.

[0063] Both of the above adjustment methods can adjust the relative position of the voice coil 4 and the frame 5, enabling the positioning fixture to adapt to the production of speakers of different specifications, effectively reducing the cost caused by changing fixtures, improving the flexibility and versatility of production, and ensuring that the relative position adjustment of the voice coil 4 and the frame 5 is accurate and efficient.

[0064] In practical applications, in addition to the adjustment methods mentioned above, positioning fixtures can also employ dynamic adjustment. For example, height adjustment can be achieved through threaded pairs, with self-locking threads ensuring stability. Precise height control can be achieved through wedge-shaped inclined plane adjustment; and adjustment can be made using hydraulic, pneumatic, or electric actuators for easy automation control. In specific applications, the appropriate fixture can be flexibly selected or combined based on the speaker's production scale, precision requirements, and cost budget.

[0065] Reference Figure 1 and Figure 6 In some embodiments, the size of the protrusion 22 is larger than the size of the side of the voice coil 4 that abuts against the protrusion 22 along the radial direction of the voice coil 4.

[0066] Understandably, the larger radial dimension of the protrusion 22 allows it to limit the top of the entire voice coil 4, forming a stable limiting structure that effectively prevents axial movement of the voice coil 4. This provides reliable boundary constraints for voice coil 4 positioning and ensures the accuracy of the relative position between the voice coil 4 and the frame 5. Furthermore, during assembly, the larger protrusion 22 is easier to grip, align, and place, preventing difficulties in handling a small voice coil 4 and ensuring assembly efficiency.

[0067] According to a second aspect of this application, a loudspeaker production line is provided, including the positioning fixture described above. The loudspeaker production line has all the beneficial effects of the positioning fixture described above, which will not be repeated here.

[0068] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0069] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0070] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0071] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A positioning jig for positioning a voice coil and a basket of a speaker, characterized by, The positioning fixture includes: The base includes a base plate and a first positioning part and a second positioning part disposed on the base plate, wherein the second positioning part is used to position the basin stand. The limiting component includes a positioning sleeve and a protrusion. The positioning sleeve is installed on the first positioning part. The positioning sleeve or the first positioning part is used to position the voice coil. The protrusion can move relative to the substrate along the height direction of the base. An adjusting member is detachably mounted on the base body, located between the base plate and the protrusion, along the height direction of the base body. The adjusting member is used to limit the voice coil with the protrusion. The thickness of the adjusting member is adjustable to adjust the relative position of the voice coil and the frame.

2. The positioning jig according to claim 1, wherein A groove is formed between the first positioning part and the second positioning part, and the adjusting member is disposed in the groove.

3. The positioning fixture of claim 2, wherein The limiting member is at least partially disposed within the groove, and the bottom of the limiting member abuts against the top of the adjusting member.

4. The positioning fixture of claim 2, wherein The inner circumferential side of the adjusting member abuts against the first positioning part, and the outer circumferential side of the adjusting member abuts against the second positioning part.

5. The positioning fixture of claim 2, wherein Both the first positioning part and the second positioning part are annular, and the second positioning part is coaxially wrapped around the first positioning part.

6. The positioning fixture of claim 5, wherein The base body has a through hole along its axis, and the center lines of the through hole, the first positioning part, and the second positioning part coincide.

7. The positioning fixture of claim 2, wherein The inner circumference of the voice coil fits against the outer circumference of the positioning sleeve, and a gap is provided between the voice coil and the second positioning part.

8. The positioning fixture of claim 2, wherein, The second positioning part includes a circumferential surface away from the positioning sleeve and a plane away from the substrate. The basin frame is provided with a radial positioning surface and an axial positioning surface. The radial positioning surface is in contact with the circumferential surface, and the axial positioning surface is in contact with the plane.

9. The positioning fixture of claim 1, wherein The adjusting member comprises a plurality of stacked adjusting units, at least some of which are disposed between the substrate and the protrusion; or, The adjustment component includes multiple adjustment units of different heights, and one of the multiple adjustment units is disposed between the substrate and the protrusion.

10. A loudspeaker production line, characterised in that, Includes the positioning fixture described in any one of claims 1-9.

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