Bidirectional parallel reel, voice coil motor, camera and electronic equipment

Abstract

The utility model relates to a bidirectional parallel winding frame, a voice coil motor, a camera and electronic equipment. The bidirectional parallel winding frame comprises a winding frame body, at least two winding grooves, a plurality of independent coils and a parallel circuit structure, the reel body is provided with a cylindrical main body structure extending in the axial direction. The at least two winding grooves are evenly distributed in the circumferential direction of the winding frame body, and each winding groove surrounds the winding frame body by a circle. A plurality of independent coils, wherein a single coil is wound in each winding groove; the starting end and the terminating end of each coil are connected in parallel through a conductive connecting piece. According to the utility model, through the unique structural design and the innovative coil connection mode, the parallel connection of multiple coils is realized, and the current in a single coil can be obviously improved without changing the input voltage, so that the thrust of the voice coil motor is greatly increased.

Description

Technical Field

[0001] This utility model relates to the field of camera voice coil motors, and more specifically, to a bidirectional parallel winding frame, a voice coil motor, a camera, and electronic equipment. Background Technology

[0002] As products become increasingly miniaturized, the load or lens weight continues to increase, requiring existing voice coil motors to generate larger currents and thus greater thrust. However, the current series winding structure is insufficient to meet this demand, limiting the application of voice coil motors in miniaturized devices to achieve high thrust. According to the voice coil motor thrust formula F=I×B×L (where F represents thrust in N; I is current in A; B is magnetic flux density in T; and L represents the effective conductor length), the existing series structure has difficulties in meeting the demand for high thrust. Utility Model Content

[0003] In view of this, the present invention provides a bidirectional parallel winding frame, which, through its unique structural design and innovative coil connection method, realizes the parallel connection of multiple coils. Without changing the input voltage, it can significantly increase the current in a single coil, thereby greatly increasing the thrust of the voice coil motor.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A bidirectional parallel winding frame includes a winding frame body, at least two winding slots, multiple independent coils, and a parallel circuit structure. The winding frame body has a cylindrical main body structure extending axially. At least two winding slots are evenly distributed circumferentially along the winding frame body, with each set of winding slots encircling the winding frame body once. Multiple independent coils are wound in each winding slot, with the coils in adjacent winding slots alternately wound in clockwise and counterclockwise directions. The starting and ending ends of each coil are connected in parallel through conductive connectors.

[0006] This bidirectional parallel winding frame, with its unique structural design and innovative coil connection method, significantly improves the performance of voice coil motors, especially greatly enhancing their thrust. When applied to voice coil motors, its parallel structure offers unique advantages. It allows for two layers of wire to be arranged on the same side, resulting in bidirectional current flow. The reason this parallel structure can achieve high thrust output is based on the characteristics of parallel circuits: in a parallel circuit, the voltage across each load is equal. This means that, under the same voltage and load conditions, this parallel structure can output a larger current compared to other structures, and a larger current, under the same magnetic field, can generate greater thrust. It is important to note that each coil is associated with a magnet, and because the coils in adjacent winding slots are wound alternately in clockwise and counterclockwise directions, the magnetic poles of adjacent magnets are also alternately distributed.

[0007] This parallel structure offers high scalability. This solution is not limited to two coils and can be increased to more than two depending on actual needs. By increasing the number of coils while maintaining the parallel structure, diverse design requirements can be met.

[0008] Preferably, the conductive connector includes a first common winding post and a second common winding post, which are fixed to both ends of the winding frame body and are insulated from the winding frame body; the starting ends of all coils are fixed to the first common winding post to form a first common connection point, and the ending ends of all coils are fixed to the second common winding post to form a second common connection point; the first common connection point and the second common connection point are connected by an external circuit to form a parallel circuit.

[0009] Traditional winding methods typically require two solder points per coil to connect to the circuit. This solution cleverly combines the starting ends of all coils into a first common connection point on a first common winding post, and the ending ends into a second common connection point on a second common winding post. This achieves the merging of solder points for two coils, simultaneously enabling a parallel connection. This design not only reduces the number of solder points, lowering the complexity and cost of the soldering process, but also significantly improves the reliability of the circuit connection. A reduced number of solder points means fewer potential failure points, lowering the risk of circuit failures caused by loose solder joints or poor soldering, and improving the stability and durability of the entire winding system.

[0010] Preferably, the conductive connector includes multiple independent sets of tap-wound post groups. Each set of tap-wound post groups includes a first tap-wound post and a second tap-wound post. The first and second tap-wound posts are fixed to the winding frame body and insulated from it. The starting end of each coil is fixed to the corresponding first tap-wound post, and the ending end of each coil is fixed to the corresponding second tap-wound post. All first tap-wound posts are electrically connected through conductive bridging components to form a first common connection point, and all second tap-wound posts are electrically connected through conductive bridging components to form a second common connection point. The first and second common connections are connected through an external circuit to form a parallel circuit.

[0011] All first tap winding posts are electrically connected via conductive bridging components to form a first common connection point, and all second tap winding posts are electrically connected via conductive bridging components to form a second common connection point. The first and second common connections are connected via an external circuit to form a parallel circuit. By connecting all first and second tap winding posts to form common connections via conductive bridging components, this connection method ensures the electrical connection consistency and stability of each coil in the parallel circuit.

[0012] Preferably, the starting and ending ends of the coil are fixed by soldering.

[0013] By precisely controlling laser parameters, the insulation layer on the surface of enameled wire can be removed efficiently and accurately, exposing the conductor portion suitable for soldering, thus creating favorable conditions for subsequent soldering operations. This laser insulation removal process is highly controllable and stable, ensuring not only complete insulation removal and preventing residual insulating material from affecting soldering quality, but also minimizing damage to the enameled wire conductor itself, protecting the electrical properties of the wire. As a result, the laser-treated enameled wire can be successfully soldered, achieving a reliable electrical connection and ensuring the stability and conductivity of the entire circuit system.

[0014] Preferably, the axes of two adjacent winding grooves are parallel to each other and parallel to the central axis of the body.

[0015] This design makes the winding process more standardized and orderly, which is beneficial to improving the accuracy and quality of winding. When the axes of adjacent winding slots are parallel, operators can more accurately control the winding direction and spacing of the coils during the winding process, reducing problems such as coil overlap and crossing caused by winding deviations, thereby ensuring that the shape and number of turns of each coil are more uniform. In addition, the parallel axis design also facilitates subsequent inspection, maintenance and repair of the winding frame. Workers can more easily inspect and process the coils in each winding slot, reducing maintenance costs and difficulty.

[0016] Preferably, at least one guide post is provided between two adjacent winding slots. The extension direction of the guide post is orthogonal to the extension direction of the winding slot, and its surface is provided with a guide groove for reversing and positioning of the enameled wire.

[0017] The guide posts and their surface guide grooves provide precise positioning guidance for the reversing of the enameled wire during the winding process. When winding the coil, the enameled wire needs to be reversed between different winding slots. At this time, the guide grooves on the guide posts accurately define the direction of the enameled wire, ensuring that it winds along the predetermined path and avoiding problems such as deviation or twisting during reversal. This not only helps improve the accuracy and neatness of the winding but also reduces damage to the enameled wire caused by improper reversal, extending its service life. Simultaneously, the design of the guide posts being orthogonal to the extension direction of the winding slots makes the entire winding process smoother and more efficient, improving production efficiency. Furthermore, the guide posts enhance the overall integrity and stability of the winding frame structure, providing additional support and positioning reference for the winding operation.

[0018] Preferably, the winding groove is a groove formed circumferentially around the winding frame body.

[0019] The groove structure provides a stable space for coil winding, which helps improve winding efficiency and quality. The winding groove can better constrain the coil, making it less prone to displacement or loosening during winding, thus ensuring the tight arrangement and neatness of the coil.

[0020] Another implementation of this patent is a voice coil motor, including the bidirectional parallel winding frame as described above.

[0021] Another implementation of this patent is a camera that includes the voice coil motor described above.

[0022] Another implementation of this patent is an electronic device, including the camera described above.

[0023] The advantages of this utility model compared to the prior art are:

[0024] This utility model discloses a bidirectional parallel winding frame. This bidirectional parallel winding frame, with its unique structural design and innovative coil connection method, significantly improves the performance of voice coil motors, especially greatly enhancing their thrust. When applied to voice coil motors, its parallel structure offers unique advantages. It allows for the arrangement of two layers of wire on the same side, resulting in bidirectional current flow. The reason this parallel structure can achieve high thrust output is based on the characteristics of parallel circuits: in a parallel circuit, the voltage across each load is equal. This means that, under the same voltage and load conditions, this parallel structure can output a larger current compared to other structures. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural diagram of the bidirectional parallel winding frame of Embodiment 1 of this utility model.

[0027] Figure 2 This is a structural diagram of the winding frame body in Embodiment 1 of this utility model.

[0028] Figure 3 This is a structural diagram of the bidirectional parallel winding frame of Embodiment 1 of this utility model from another perspective.

[0029] Figure 4 This is a structural diagram of the bidirectional parallel winding frame of Embodiment 2 of this utility model.

[0030] Figure 5 This is a structural diagram of the bidirectional parallel winding frame of Embodiment 2 of this utility model.

[0031] Label Explanation

[0032] (1) Winding frame body.

[0033] (2) Winding groove.

[0034] (3) Conductive bridging components.

[0035] (4) First common winding post.

[0036] (4a) First common winding post.

[0037] (5) Second common winding post.

[0038] (5a) First common winding post.

[0039] (6) Coil.

[0040] (7) Conductive connectors.

[0041] (8) Guide column.

[0042] (9) Guide groove. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0045] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of this application, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0047] The technical solutions in this application will now be described with reference to the accompanying drawings. Example 1

[0048] This embodiment provides a bidirectional parallel winding frame, including a winding frame body 1, two winding slots 2, two independent coils 6, and a parallel circuit structure; the winding frame body 1 has a cylindrical main body structure extending along the axial direction; the two winding slots 2 are evenly distributed around the circumference of the winding frame body 1, and each set of winding slots 2 surrounds the winding frame body 1 once; there are two independent coils 6, with a single coil 6 wound in each winding slot 2, and the coils 6 in adjacent winding slots 2 are wound alternately in clockwise and counterclockwise directions; the starting end and the ending end of each coil 6 are connected in parallel through conductive connectors 7.

[0049] This bidirectional parallel winding frame, with its unique structural design and innovative coil connection method, significantly improves the performance of voice coil motors, especially greatly enhancing their thrust. When applied to voice coil motors, its parallel structure offers unique advantages. It allows for two layers of wire to be arranged on the same side, resulting in bidirectional current flow. The reason this parallel structure can achieve high thrust output is based on the characteristics of parallel circuits: in a parallel circuit, the voltage across each load is equal. This means that, under the same voltage and load conditions, this parallel structure can output a larger current compared to other structures, and a larger current, under the same magnetic field, can generate greater thrust. It is important to note that each coil is associated with a magnet, and because the coils in adjacent winding slots are wound alternately in clockwise and counterclockwise directions, the magnetic poles of adjacent magnets are also alternately distributed.

[0050] This parallel structure is highly scalable. This solution is not limited to two coils 6; it can be increased to more than two depending on actual needs. By increasing the number of coils 6 while maintaining the parallel structure, diverse design requirements can be met. For example, in applications requiring high thrust, the thrust can be increased by increasing the number of coils 6; similarly, in circuits with high inductance accuracy requirements, the thrust can also be increased by appropriately increasing the number of coils 6.

[0051] Specifically, according to the power consumption calculation formula:

[0052] P=I^2*R

[0053] Assuming the voltage is 3V and the resistance of the three coils is 10Ω, the voltage is equal.

[0054] Comparison of series and parallel power consumption:

[0055] Series circuit:

[0056] The resistance of the series coil is 10 + 10 + 10 = 30Ω

[0057] I = 3 / 10 = 0.1A

[0058] therefore:

[0059] P = 0.1^2 * 30 = 0.3W

[0060] Parallel circuit

[0061] The resistance of the parallel coil is: 1 / Rtotal = 1 / 10 + 1 / 10 + 1 / 10 = 3 / 10

[0062] Therefore, R_total = 10 / 3 ≈ 3.33Ω

[0063] I = 3 / 3.33 ≈ 0.9A

[0064] therefore

[0065] P = 0.9^2 * 3.33 = 2.697W

[0066] A parallel connection of coils with the same voltage and number consumes more power than a series connection, but a parallel connection generates a larger current to the coils than a series connection.

[0067] The thrust formula for a voice coil motor is:

[0068] As can be seen from F=I*B*L, the parallel connection of multiple coils with the same voltage can generate a greater thrust than the series connection, because the output current is greater when connected in parallel than when connected in series.

[0069] In this embodiment, the conductive connector 7 includes a first common winding post 4 and a second common winding post 5. The first common winding post 4 and the second common winding post 5 are fixed to both ends of the winding frame body 1 and are insulated from the winding frame body 1. The starting ends of all coils 6 are fixed to the first common winding post 4 to form a first common connection point, and the ending ends of all coils 6 are fixed to the second common winding post 5 to form a second common connection point. The first common connection point and the second common connection point are connected by an external circuit to form a parallel circuit.

[0070] Traditional winding methods typically require two solder joints for each coil 6 to connect to the circuit. This solution cleverly combines the starting ends of all coils 6 to form a first common connection point (first common winding post 4) and the ending ends of all coils 6 to form a second common connection point (second common winding post 5), thus achieving a parallel connection. This design not only reduces the number of solder joints, lowering the complexity and cost of the soldering process, but also significantly improves the reliability of the circuit connection. The reduced number of solder joints means fewer potential failure points, lowering the risk of circuit failures caused by loose solder joints or poor soldering, and improving the stability and durability of the entire winding system.

[0071] In this embodiment, the starting end and the ending end of the coil 6 are fixed by soldering.

[0072] By precisely controlling laser parameters, the insulation layer on the surface of enameled wire can be removed efficiently and accurately, exposing the conductor portion suitable for soldering, thus creating favorable conditions for subsequent soldering operations. This laser insulation removal process is highly controllable and stable, ensuring not only complete insulation removal and preventing residual insulating material from affecting soldering quality, but also minimizing damage to the enameled wire conductor itself, protecting the electrical properties of the wire. As a result, the laser-treated enameled wire can be successfully soldered, achieving a reliable electrical connection and ensuring the stability and conductivity of the entire circuit system.

[0073] In this embodiment, the axes of two adjacent winding grooves 2 are parallel to each other and parallel to the central axis of the body.

[0074] This design makes the winding process more standardized and orderly, which is beneficial to improving the accuracy and quality of winding. When the axes of adjacent winding slots 2 are parallel, operators can more accurately control the winding direction and spacing of coils 6 during the winding process, reducing problems such as coil overlap and crossing caused by winding deviations, thereby ensuring that the shape and number of turns of each coil 6 are more uniform. In addition, the parallel axis design also facilitates subsequent inspection, maintenance and repair of the winding frame. Workers can more easily inspect and process the coils 6 in each winding slot 2, reducing maintenance costs and difficulty.

[0075] In this embodiment, a guide post 8 is provided between two adjacent winding grooves 2. The extension direction of the guide post 8 is orthogonal to the extension direction of the winding groove 2, and its surface is provided with a guide groove 9 for reversing and positioning of the enameled wire.

[0076] The guide post 8 and its surface guide groove 9 are designed to provide precise positioning guidance for the reversing of the enameled wire during the winding process. When winding coil 6, the enameled wire needs to be reversed between different winding slots 2. At this time, the guide groove 9 on the guide post 8 can accurately limit the direction of the enameled wire, ensuring that it is wound along the predetermined path and avoiding problems such as deviation or twisting during the reversing process. This not only helps improve the accuracy and neatness of the winding but also reduces damage to the enameled wire caused by improper reversing, extending its service life. Simultaneously, the design of the guide post 8 being orthogonal to the extension direction of the winding slot 2 makes the entire winding process smoother and more efficient, improving production efficiency. Furthermore, the guide post 8 enhances the overall integrity and stability of the winding frame structure, providing additional support and positioning reference for the winding operation.

[0077] In this embodiment, the winding groove 2 is a groove that is opened around the circumference of the winding frame body 1.

[0078] The groove structure provides a stable space for the winding of coil 6, which is beneficial to improving the winding efficiency and quality. The winding groove 2 can better constrain coil 6, making it less prone to displacement or loosening during the winding process, thus ensuring the tight arrangement and neatness of coil 6.

[0079] Furthermore, the existing side-winding method using a winding frame presents numerous problems during the winding process. To prevent the height of the wound coils from exceeding the expected range and causing product defects, the coils must be positioned correctly. After one side of the coil is wound, a clamp must be used to flip the winding frame, or the lead-in tool must be reversed, before the other side can be wound. It is clear that the entire winding process involves complex steps, resulting in relatively high costs.

[0080] In comparison, this embodiment effectively avoids the aforementioned defects. Based on a conventional direct-wound coil, this embodiment adds a guide post for reverse winding. Specifically, during clockwise winding of the coil, after the first set of slots is full, the guide post designed on the winding frame is used for winding. At this point, simply rotating the fixture fixing the winding frame in the reverse direction allows for the second layer of winding to be carried out, thus successfully realizing a forward and reverse direct-wound coil structure, greatly simplifying production. Example 2

[0081] Unlike Embodiment 1, in this embodiment, the conductive connector 7 includes multiple independent tap winding post groups. Each tap winding post group includes a first tap winding post 4a and a second tap winding post 5a. The first tap winding post 4a and the second tap winding post 5a are fixed to the winding frame body 1 and insulated from the body. The starting end of each coil 6 is fixed to the corresponding first tap winding post 4a, and the ending end of each coil 6 is fixed to the corresponding second tap winding post 5a. All first tap winding posts 4a are electrically connected through conductive bridge 3 to form a first common connection point, and all second tap winding posts 5a are electrically connected through conductive bridge 3 to form a second common connection point. The first common connection point and the second common connection point are connected through an external circuit to form a parallel circuit.

[0082] All first tap winding posts 4a are electrically connected via conductive bridging member 3 to form a first common connection point, and all second tap winding posts 5a are electrically connected via conductive bridging member 3 to form a second common connection point. The first and second common connections are connected via an external circuit to form a parallel circuit. By connecting all first tap winding posts 4a and all second tap winding posts 5a via conductive bridging member 3 to form common connections, this connection method ensures the electrical connection consistency and stability of each coil 6 in the parallel circuit.

[0083] As attached Figure 5 The diagram shows the connection between coil B and coil C. Solder points B1 and C1 connect the beginnings of the two coils to conductive bridge 3. Solder points B2 and C2 connect the ends of the two coils to another conductive bridge 3. Solder points D1 and D2 are connected to the positive and negative poles and form a parallel structure. Each solder point connects the enameled wire to the conductive bridge using soldering. The conductive bridge is a metal spring.

[0084] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bidirectional parallel winding frame, characterized in that, include The winding frame body (1) has a cylindrical main body structure extending along the axial direction; At least two winding slots (2) are evenly distributed along the circumference of the winding frame body (1), and each set of winding slots (2) surrounds the winding frame body (1) once. Multiple independent coils (6), with a single coil (6) wound in each winding slot (2); In the parallel circuit structure, the starting and ending ends of each coil (6) are connected in parallel through conductive connectors (7).

2. The bidirectional parallel winding frame according to claim 1, characterized in that, The conductive connector (7) includes a first common winding post (4) and a second common winding post (5). The first common winding post (4) and the second common winding post (5) are fixed to both ends of the winding frame body (1) and are insulated from the winding frame body (1). The starting ends of all coils (6) are fixed to the first common winding post (4) and form the first common connection point. The ending ends of all coils (6) are fixed to the second common winding post (5) and form the second common connection point. The first common connection point and the second common connection point are connected by an external circuit to form a parallel circuit.

3. The bidirectional parallel winding frame according to claim 1, characterized in that, The conductive connector (7) includes multiple independent tap winding post groups. Each tap winding post group includes a first tap winding post (4a) and a second tap winding post (5a). The first tap winding post (4a) and the second tap winding post (5a) are fixed to the winding frame body (1) and insulated from the body. The starting end of each coil (6) is fixed to the corresponding first tap winding post (4a), and the ending end of each coil (6) is fixed to the corresponding second tap winding post (5a). All first tap winding posts (4a) are electrically connected through conductive bridge (3) to form a first common connection point, and all second tap winding posts (5a) are electrically connected through conductive bridge (3) to form a second common connection point. The first common connection point and the second common connection point are connected through an external circuit to form a parallel circuit.

4. The bidirectional parallel winding frame according to claim 1, characterized in that, The starting and ending ends of the coil (6) are fixed by soldering.

5. The bidirectional parallel winding frame according to claim 1, characterized in that, The axes of two adjacent winding slots (2) are parallel to each other.

6. The bidirectional parallel winding frame according to claim 1, characterized in that, At least one guide post (8) is provided between two adjacent winding grooves. The extension direction of the guide post (8) is orthogonal to the extension direction of the winding groove (2), and its surface is provided with a guide groove (9) for reversing and positioning of the enameled wire.

7. The bidirectional parallel winding frame according to claim 1, characterized in that, The winding groove (2) is a groove continuously opened around the circumference of the winding frame body (1).

8. A voice coil motor, characterized in that, Includes a bidirectional parallel winding frame as described in any one of claims 1-7.

9. A camera, characterized in that, Including the voice coil motor as described in claim 8.

10. An electronic device, characterized in that, Includes the camera as described in claim 9.

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