Automatic focusing motor with extremely simple structure
By using a design with two rectangular magnets and a rectangular spring, the problems of high cost and complex manufacturing steps of existing autofocus motors have been solved, resulting in cost reduction and improved production efficiency.
Patent Information
- Application Number
- CN202423232077.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing autofocus motors suffer from complex manufacturing processes and high costs due to the use of multiple magnets and springs.
The design employs two rectangular magnets and one rectangular spring, which increases the interaction area between the magnets and the coil, reduces the number of magnets, and combines the spring, thus keeping the motor function unaffected.
It reduces the production cost of autofocus motors, simplifies the manufacturing process, and improves production efficiency.
Smart Images
Figure CN223652125U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to an autofocus motor with an extremely simple structure. Background Technology
[0002] The main principle of an autofocus motor is that within a permanent magnetic field, the magnitude of the direct current in the motor's internal coil controls the stretching position of a spring, thereby causing it to move up and down. Mobile phone cameras widely use a VCM (Vibration Module) to achieve autofocus; the VCM allows adjustment of the lens position to produce a clear image.
[0003] Currently, existing autofocus motors typically use four magnets and two springs to achieve their function. The more components a module uses, the more manufacturing steps and assembly stages are involved, leading to higher costs. To address this issue, a minimally simplistic autofocus motor is proposed. Utility Model Content
[0004] The purpose of this invention is to provide an autofocus motor with an extremely simple structure to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] An autofocus motor with a minimalist structure includes a base, a lens carrier, a coil, magnets, springs, and a housing. Four support sections are located at the four opposite corners of the top of the base. The lens carrier is movably disposed between the four support sections on the base. The coil is fixed to the outer periphery of the lens carrier. The magnets include two rectangular magnets, respectively disposed on the inner sidewalls of two opposite sides of the housing. The springs include a rectangular spring located above the lens carrier and fixed to the top of the support sections. The housing is engaged with the base. The two magnets are located between the support sections on two opposite sides of the base, adjacent to the coil. The magnets and the coil generate electromagnetic induction, driving the lens carrier to move along a preset direction.
[0007] Preferably, the rectangular spring includes four first spring blocks, four second spring blocks, and two third spring blocks. The first spring blocks are quasi-right-angled triangles located at the four opposite corners of the rectangle. The second spring blocks are quasi-S-shaped. The third spring blocks are arc-shaped and located inside the first spring blocks. One end of the second spring block is connected to the first spring block, and the other end is connected to the third spring block. Two of the third spring blocks form a circle with two notches. The two notches are adjacent to the two second spring blocks at the two opposite corners. Two rectangular holes are formed between the second spring blocks and the third spring blocks at the other two opposite corners.
[0008] Preferably, the outer side wall of the lens carrier is provided with an annular mounting groove, and the outer side wall of the top of the lens carrier is provided with two protruding welding parts. The coil is inserted into the mounting groove and welded to the welding parts. The mounting groove is provided with four inwardly recessed guide grooves.
[0009] Preferably, the top surface of the outer shell is provided with four guide plates at four opposite corners, which are bent vertically toward the bottom of the outer shell. The guide plates are inserted into the guide groove of the lens carrier through two notches and two rectangular holes on the spring sheet.
[0010] Preferably, the lens carrier moves up and down along the guide plate via the wire groove.
[0011] Preferably, the support consists of four triangular prisms, with a positioning post on the top surface of each prism. The first elastic block has a corresponding positioning hole, and the elastic piece is fixed to the base by passing the positioning post through the positioning hole.
[0012] Preferably, two terminal slots are respectively opened on the two triangular prisms on one side of the base, and terminal blocks are fixedly installed in the terminal slots.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] This invention reduces the number of magnets required for the motor from four to two. By using rectangular magnets, the area of interaction with the coil is increased, ensuring that the motor function is not affected compared to four magnets. The two springs required in the conventional design are reduced to one spring, which can also achieve the restoration of the lens carrier. This invention has fewer parts, but similar performance and function, is easy to process and assemble, reduces costs, and improves production efficiency. Attached Figure Description
[0015] Figure 1 This is an exploded view of the overall structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the internal structure of this utility model;
[0017] Figure 3 This is a schematic diagram of the base structure of this utility model;
[0018] Figure 4 This is a schematic diagram of the lens carrier structure of this utility model;
[0019] Figure 5 This is a schematic diagram of the spring clip structure of this utility model;
[0020] Figure 6 This is a schematic diagram of the outer shell structure of this utility model.
[0021] Figure Labels
[0022] 1. Base, 101. Triangular prism, 102. Positioning post, 103. Terminal groove, 104. Terminal block, 2. Lens carrier, 201. Mounting groove, 202. Guide groove, 203. Welding part, 3. Coil, 4. Magnet, 5. Spring, 501. First spring block, 502. Second spring block, 503. Third spring block, 504. Positioning hole, 6. Housing, 601. Guide plate. Detailed Implementation
[0023] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0024] like Figure 1-3 As shown, an autofocus motor with a minimalist structure includes a base 1, a lens carrier 2, a coil 3, a magnet 4, a spring 5, and a housing 6. The base 1 serves as the carrier for the motor components, supporting and carrying the necessary components. Four triangular prisms 101 are respectively arranged at the four opposite corners of the top of the base 1. The lens carrier 2 is movably arranged between the four triangular prisms 101 on the base 1. The coil 3 is fixed to the outer periphery of the lens carrier 2. The magnet 4 includes two rectangular magnets 4, which are respectively arranged on the inner sidewalls of the two opposite sides of the housing 6. The spring 5 includes a rectangular spring 5, located above the lens carrier 2 and fixed to the top of the triangular prism 101. A positioning post 102 is provided on the top surface of the triangular prism 101. A positioning hole 504 is correspondingly provided on the first spring block 501501. The spring 5 is fixed to the base 1 through the positioning post 102 and the positioning hole 504. It is easy to process. Compared with two springs 5, setting one spring 5 above the lens carrier 2 can also make the components of the lens carrier 2 return to their original position.
[0025] The outer shell 6 is snapped into the base 1, achieving a seal between the outer shell 6 and the base 1, and providing a certain limit for the components inside the autofocus motor. It also provides a certain protection to prevent the internal components from falling off or being damaged if the autofocus motor falls. Two magnets 4 are located between the support parts on two opposite sides of the base 1, adjacent to the coil 3. The magnets 4 and the coil 3 generate electromagnetic induction to drive the lens carrier 2 to move in a preset direction. The number of magnets 4 required for the motor is reduced from the conventional four to two. By setting rectangular magnets 4, the interaction area with the coil 3 is increased, ensuring that the function of the motor is not affected compared to four magnets 4. Two terminal slots 103 are respectively opened on the two triangular prisms 101 on one side of the base 1. Terminals 104 are fixedly installed in the terminal slots 103.
[0026] like Figure 4As shown, an annular mounting groove 201 is provided on the outer side wall of the lens carrier 2, and two protruding welding parts 203 are provided on the outer side wall of the top of the lens carrier 2. The coil 3 is inserted into the mounting groove 201 and welded to the welding parts 203. The upper welding is convenient for operation. Four inwardly recessed guide grooves 202 are evenly distributed on the mounting groove 201.
[0027] like Figure 5 As shown, the rectangular spring piece 5 includes four first spring blocks 501, four second spring blocks 502, and two third spring blocks 503. The first spring blocks 501 are roughly right-angled triangles located at the four opposite corners of the rectangle. The second spring blocks 502 are roughly "S"-shaped, and the third spring blocks 503 are arc-shaped and located inside the first spring blocks 501. One end of the second spring block 502 is connected to the first spring block 501, and the other end is connected to the third spring block 503. The two third spring blocks 503 form a circle with two notches. The two notches are adjacent to the two second spring blocks 502 at the two opposite corners. Two rectangular holes are formed between the second spring blocks 502 and the third spring blocks 503 at the other two opposite corners. The rectangular shape of the spring piece 5 better adapts to the shape of the lens carrier 2 and the shape of the outer shell 6, so that the spring piece is covered inside the outer shell 6, achieving the positioning effect of the spring piece and preventing the spring piece from shifting or falling off.
[0028] like Figure 6 As shown, four guide plates 601 are provided at the four opposite corners of the top surface of the outer shell 6, bending vertically towards the bottom of the outer shell 6. The guide plates 601 pass through the two notches and two rectangular holes on the spring piece 5 and are inserted into the guide grooves 202 of the lens carrier 2. The lens carrier 2 moves up and down along the guide plates 601 through the wire groove to achieve the focusing function. The outer shell 6 is snapped into the base 1. The guide plates 601 are inserted into the guide grooves 202, which play a certain role in limiting and guiding the components in the autofocus motor, and at the same time play a certain role in protection.
[0029] This invention reduces the number of magnets 4 required for the motor from four to two. By setting rectangular magnets 4, the area of interaction with the coil 3 is increased. Compared with four magnets 4, this ensures that the function of the motor is not affected. The two upper and lower springs 5 required in the conventional method are reduced to one spring 5, which can also realize the restoration of the lens carrier 2. This invention has fewer parts, but the performance and function are similar. It is easy to process and assemble, reduces costs, and improves production efficiency.
[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. An autofocus motor with an extremely simple structure, characterized in that: The device includes a base, a lens carrier, a coil, magnets, springs, and a housing. Four support sections are located at the four opposite corners of the top of the base. The lens carrier is movably disposed between the four support sections on the base. The coil is fixed to the outer periphery of the lens carrier. The magnets include two rectangular magnets, each disposed on the inner sidewalls of two opposite sides of the housing. The springs include one rectangular spring, located above the lens carrier and fixed to the top of the support sections. The housing is engaged with the base. The two magnets are located between the support sections on two opposite sides of the base, adjacent to the coil. The magnets and the coil generate electromagnetic induction, driving the lens carrier to move along a preset direction.
2. The autofocus motor with a minimalist structure according to claim 1, characterized in that: The rectangular spring includes four first spring blocks, four second spring blocks, and two third spring blocks. The first spring blocks are roughly right-angled triangles located at the four opposite corners of the rectangle. The second spring blocks are roughly "S"-shaped. The third spring blocks are arc-shaped and located inside the first spring blocks. One end of the second spring block is connected to the first spring block, and the other end is connected to the third spring block. Two of the third spring blocks form a circle with two notches. The two notches are adjacent to the two second spring blocks at the two opposite corners. Two rectangular holes are formed between the second spring blocks and the third spring blocks at the other two opposite corners.
3. The autofocus motor with a minimalist structure according to claim 2, characterized in that: The outer wall of the lens carrier is provided with an annular mounting groove, and the outer wall of the top of the lens carrier is provided with two protruding welding parts. The coil is inserted into the mounting groove and welded to the welding parts. The mounting groove is provided with four inwardly recessed guide grooves.
4. The autofocus motor with a minimalist structure according to claim 3, characterized in that: Four guide plates are provided at the four opposite corners of the top surface of the outer shell, bending vertically towards the bottom of the outer shell. The guide plates pass through two notches and two rectangular holes on the spring sheet and are inserted into the guide groove of the lens carrier.
5. The autofocus motor with a minimalist structure according to claim 4, characterized in that: The lens carrier moves up and down along the guide plate via the wire groove.
6. The autofocus motor with a minimalist structure according to claim 2, characterized in that: The support consists of four triangular prisms, with a positioning post on the top surface of each prism. The first elastic block has a corresponding positioning hole, and the elastic piece is fixed to the base by passing through the positioning post and the positioning hole.
7. The autofocus motor with a minimalist structure according to claim 6, characterized in that: Two terminal slots are respectively opened on the two triangular prisms on one side of the base, and terminal blocks are fixedly installed in the terminal slots.