Miniature voice coil framework with lateral special-shaped hole and processing device thereof

Abstract

A miniature voice coil framework with lateral special-shaped holes and a processing device thereof, the miniature voice coil framework comprises a frame, a positioning device, a driving device and a laser drilling device, the driving device is arranged in the frame, the positioning device is arranged on the driving device, and the laser drilling device is arranged on the outer side of the positioning device; the annular voice coil framework is arranged on the positioning device in a sleeving mode, the driving device drives the positioning device to rotate, and the laser drilling device conducts drilling machining on the voice coil framework. According to the machining device, laser drilling is adopted, the shape and the number are not limited at all, flexibility is high, and practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to micro loudspeaker manufacturing technical field especially, it is a kind of micro voice coil former with lateral special-shaped hole and its processing device. BACKGROUND

[0002] The existing micro loudspeaker usually adopts the fixed combination structure of voice coil and former, and the former is an important supporting component of the voice coil, and its design has a significant impact on the performance of the loudspeaker. However, the traditional voice coil former is mostly closed or simply hollowed out, which can meet the lightweight demand, but cannot take into account the ventilation and heat dissipation of the voice coil, rigid support and material utilization optimization. In addition, a few of the former are provided with circular holes penetrating from the inside to the outside, but the former is usually formed into a strip structure first, and then the strip structure is punched with breathable circular holes, and finally the two ends of the strip structure are bonded into a ring structure. The circular hole structure of the former of this structure is difficult to make the former achieve optimal lightweight and best heat dissipation effect, and the thickness of the bonding area of the former is greater than that of other areas, which is not flat and may cause the movement of the voice coil in the magnetic gap to be blocked, resulting in abnormal sound. SUMMARY

[0003] Therefore, it is necessary to provide a micro voice coil former with lateral special-shaped hole and its processing device to overcome the defects in the prior art.

[0004] A micro voice coil former with lateral special-shaped hole comprises a body part, which is integrally formed and arranged in a ring shape, and comprises a winding area and a heat dissipation area, and the heat dissipation area is arranged above the winding area; a plurality of special-shaped holes are arranged on the heat dissipation area, and the special-shaped holes penetrate the body part from the inside to the outside, and the special-shaped holes are one or a combination of polygon, ellipse and irregular shape.

[0005] Further, the special-shaped holes are distributed along the circumference of the former.

[0006] A micro voice coil former processing device comprises a rack, a positioning device, a driving device and a laser drilling device, the driving device is installed in the rack, the positioning device is installed on the driving device, and the laser drilling device is arranged on the outer side of the positioning device; a ring-shaped voice coil former is sleeved on the positioning device, the driving device drives the positioning device to rotate, and the laser drilling device drills the voice coil former.

[0007] Further, the positioning device comprises a positioning shaft and a limiting part arranged on the inner side of the positioning shaft, the outer diameter of the limiting part is greater than that of the positioning shaft, and a limiting step surface is formed on the outer side end surface of the limiting part.

[0008] Further, it further comprises a material tank, and the material tank is arranged directly below the positioning shaft.

[0009] Furthermore, the limiting part is a cylindrical structure, which is sleeved on the outer surface of the positioning shaft, and the limiting part can move back and forth along the positioning shaft.

[0010] Furthermore, the material trough is divided into a waste trough and a finished product trough. The finished product trough is located outside the waste trough and directly below the outer end of the positioning shaft.

[0011] Furthermore, a detachable compensation sleeve is provided on the outer surface of the positioning shaft. The inner end face of the compensation sleeve abuts against the limiting step surface, and its outer diameter is smaller than the outer diameter of the limiting part; the voice coil skeleton is sleeved on the outer surface of the compensation sleeve.

[0012] In summary, this invention, by setting irregularly shaped heat dissipation holes on the miniature voice coil skeleton, not only improves heat dissipation performance and enhances the heat dissipation efficiency of the voice coil during operation, effectively reducing the speaker's temperature rise; it also reduces the overall weight of the skeleton and improves the speaker's sensitivity; simultaneously, it optimizes the airflow channel, improving the linearity of the voice coil movement and sound quality. Furthermore, the irregularly shaped holes can minimize material usage and reduce production costs while achieving structural optimization, and improve overall acoustic performance. Moreover, the processing device for the WeChat voice coil skeleton uses a laser drilling device to process holes in the one-piece molded skeleton, with no restrictions on the shape or number of holes, offering high flexibility, strong practicality, and significant potential for widespread application. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the miniature voice coil skeleton with a lateral irregular hole of the present invention;

[0014] Figure 2 This is a schematic diagram of the first embodiment of the processing device for the miniature voice coil skeleton with lateral irregular holes of the present invention. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model.

[0016] like Figure 1 As shown, this utility model provides a miniature voice coil skeleton with lateral irregularly shaped holes. The miniature voice coil skeleton with lateral irregularly shaped holes includes a body portion 10, which is integrally formed and has no joint lines on its side. The body portion is annularly arranged and includes a winding area 11 and a heat dissipation area 12, with the heat dissipation area 12 located above the winding area 11. The heat dissipation area 12 is provided with a plurality of irregularly shaped holes 13, which penetrate the body portion 10 internally and externally.

[0017] In the embodiment, the special-shaped hole 13 is a combination of one or more of a polygon, an ellipse, and an irregular shape. The design of the structure can more effectively optimize stress distribution; and the special-shaped hole 13 can more greatly lightweight the skeleton than a round hole. The design of the special-shaped hole 13 not only provides a heat dissipation channel for the voice coil during operation, but also enhances air flowability; and the design of the special-shaped hole makes the overall mass of the skeleton reduced by 20%-30%. The special-shaped hole 13 is distributed along the circumference of the skeleton, and the arrangement interval is set according to the stress condition and heat dissipation requirement of the skeleton.

[0018] As shown in Figure 2 The micro voice coil skeleton machining device is used for machining a special-shaped hole 13 on a heat dissipation area 12 of a micro voice coil skeleton. The micro voice coil skeleton machining device comprises a rack 20, a positioning device 30, a driving device (not shown in the figure), and a laser drilling device (not shown in the figure). The driving device is arranged in the rack 20, the positioning device 30 is arranged on the driving device, and the laser drilling device is arranged on the outer side of the positioning device 30. The voice coil skeleton 40 is sleeved on the positioning device 30, the laser drilling device drills the voice coil skeleton 40, and the driving device drives the positioning device 30 to rotate to drill a required number of holes according to requirements.

[0019] The positioning device 30 comprises a positioning shaft 31 and a limiting part 32 arranged on the inner side of the positioning shaft 31. The limiting part 32 has an outer diameter greater than that of the positioning shaft 31, and a limiting step surface 33 is formed on the outer side end surface of the limiting part 32. In use, the voice coil skeleton 40 is sleeved on the positioning shaft 31, and the inner side end surface thereof abuts against the limiting step surface 33. The laser drilling device is started to drill the voice coil skeleton 40, and then the driving device drives the positioning device 30 to rotate the voice coil skeleton 40, so that the next hole position is aligned with the laser drilling device to drill a hole. The above process is repeated until all holes are drilled. The machining method has no arbitrary requirements for the number of holes and the shape of the holes, has higher flexibility, and has stronger applicability.

[0020] Understandably, in another embodiment, a material groove (not shown in the figure) is further arranged below the positioning shaft 31. During the rotation of the voice coil skeleton 40, the waste formed by hole drilling falls into the material groove, so as to collect the waste. Further, in other embodiments, the material groove is divided into an inner waste groove and an outer finished product groove. The limiting part is a cylindrical structure, which is sleeved on the outer surface of the positioning shaft and can move forward and backward along the positioning shaft. During hole drilling, the limiting part is used for limiting the voice coil skeleton 40, and after hole drilling, the limiting part moves forward to push the voice coil skeleton 40 to fall into the finished product groove. In the embodiment, the limiting part is driven by a pneumatic cylinder.

[0021] In addition, a compensation sleeve (not shown) can be arranged on the outer surface of the positioning shaft 31, which is detachably sleeved on the positioning shaft, the inner end surface of the compensation sleeve abuts against the limiting step surface 33, and the outer diameter of the compensation sleeve is smaller than the outer diameter of the limiting portion; the voice coil former 40 is sleeved on the outer surface of the compensation sleeve. When products with different outer diameters need to be processed, the compensation sleeve can be increased or decreased to position the diaphragm products with different inner diameters.

[0022] In summary, the utility model discloses a micro voice coil former is provided with special-shaped heat dissipation holes, which not only improves the heat dissipation performance, enhances the heat dissipation efficiency of the voice coil during operation, effectively reduces the temperature rise of the loudspeaker, but also reduces the overall weight of the former, improves the sensitivity of the loudspeaker, optimizes the air flow channel, improves the linearity of the voice coil movement and the sound quality performance. In addition, the special-shaped holes can reduce the amount of material used and the production cost to the greatest extent under the premise of realizing structural optimization, and improve the overall acoustic performance. In addition, the processing device of the micro voice coil former adopts a laser drilling device to process the holes of the integrally formed former, which has no limitation on the shape and quantity, is flexible and practical, and has strong popularization significance.

[0023] The above-described embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A miniature voice coil skeleton processing device, characterized in that: The device includes a frame, a positioning device, a driving device, and a laser drilling device. The driving device is installed inside the frame, the positioning device is installed on the driving device, and the laser drilling device is located outside the positioning device. An annular voice coil skeleton is fitted onto the positioning device. The driving device drives the positioning device to rotate, and the laser drilling device performs drilling processing on the voice coil skeleton.

2. The miniature voice coil skeleton processing device as described in claim 1, characterized in that: The positioning device includes a positioning shaft and a limiting part disposed inside the positioning shaft. The outer diameter of the limiting part is larger than that of the positioning shaft, and a limiting step surface is formed on the outer end face of the limiting part.

3. The miniature voice coil skeleton processing device as described in claim 2, characterized in that: It also includes a material trough, which is located directly below the positioning shaft.

4. The miniature voice coil skeleton processing device as described in claim 2, characterized in that: The limiting part is a cylindrical structure that is sleeved on the outer surface of the positioning shaft, and the limiting part can move back and forth along the positioning shaft.

5. The miniature voice coil skeleton processing device as described in claim 3, characterized in that: The material trough is divided into a waste trough and a finished product trough. The finished product trough is located outside the waste trough and directly below the outer end of the positioning shaft.

6. The miniature voice coil skeleton processing device as described in claim 2, characterized in that: A detachable compensation sleeve is also provided on the outer surface of the positioning shaft. The inner end face of the compensation sleeve abuts against the limiting step surface, and its outer diameter is smaller than the outer diameter of the limiting part. The voice coil skeleton is sleeved on the outer surface of the compensation sleeve.

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