Variable aperture rotating structure, camera module and electronic product

Abstract

The invention belongs to the technical field of piezoelectric driving, and discloses a variable aperture rotating structure which comprises a rotating part, a piezoelectric assembly and a clamp. The rotating piece extends towards one side of the rotating piece and is provided with an elastic clamping part; a ceramic rod of the piezoelectric assembly extends into the elastic clamping part; and the clamp is clamped with the elastic clamping part so as to clamp the ceramic rod of the piezoelectric assembly. The ceramic rod of the piezoelectric assembly is used for driving the blades to move so as to control the size of the aperture, the structure is simple and compact, and the effect is good. The invention further discloses a camera module with the variable aperture rotating structure and an electronic product.

Description

Technical Field

[0001] The present invention belongs to the field of piezoelectric drive technology, and in particular relates to a variable aperture rotation structure, a camera module and an electronic product. Background Art

[0002] With the rapid development of mobile phones, tablets and other terminal devices, their camera function has also become a major focus of users. In order to meet higher quality shooting requirements, variable apertures are increasingly widely used in mobile phones, tablets and other terminal devices. The variable aperture is usually driven by a driving mechanism to drive the rotating parts, and then control the rotation of the blades to achieve the change of the aperture size. The traditional variable aperture drive mechanism is mainly based on electromagnetic induction drives such as stepping motors. However, such a structure will cause the entire variable aperture motor to be large in size, low in power density, and severe electromagnetic interference. Summary of the invention

[0003] In order to solve the above technical problems, the present invention discloses a variable aperture rotation structure, which uses a ceramic rod of a piezoelectric component to drive the blades to move to achieve the control of the aperture size, and has a simple and compact structure and good effect. The present invention also discloses a camera module and an electronic product having the above variable aperture rotation structure.

[0004] The specific technical solutions of the present invention are as follows:

[0005] A variable aperture rotation structure, comprising:

[0006] A rotating member, wherein an elastic clamping portion is extended to one side of the rotating member;

[0007] A piezoelectric component, wherein the ceramic rod of the piezoelectric component extends into the elastic clamping portion; and

[0008] A clamp is clamped to the elastic clamping portion to clamp the ceramic rod of the piezoelectric component.

[0009] In the present application, the elastic force of the elastic clamping part is utilized to interact with the ceramic rod of the piezoelectric component to generate friction force, and the rotating part is driven to rotate through the interaction of static friction force and dynamic friction force, and the clamping force of the elastic clamping part is further maintained through the combination of the clamp and the elastic clamping part, thereby effectively delaying the fatigue failure of the force arm of the elastic clamping part, extending the life of the rotating structure, and ensuring the motion accuracy of the rotating structure; in addition, the present application is based on the piezoelectric component drive, and the linear motion of the ceramic rod is converted into the rotational motion of the rotating part by adding an elastic clamping part and a clamp, which can well ensure the stability and accuracy of the rotational motion, and can have a higher power density and smaller electromagnetic interference.

[0010] Preferably, the elastic clamping portion is a continuous multiple-bending structure, and a accommodating space is formed at the free end of the elastic clamping portion, and the accommodating space has opposite side wall one and side wall two. The clip is clamped on side wall one and side wall two to enclose the accommodating space, and side wall one and side wall two press the ceramic rod of the piezoelectric component located in the accommodating space.

[0011] This structure can well form a force arm for clamping the ceramic rod, thereby well forming a motion friction force on the ceramic rod, thereby better meeting the rotation requirements of the rotating part.

[0012] Preferably, the clamp comprises a main body, and both ends of the main body are provided with clamping parts extending in the same direction and used for clamping the elastic clamping part, and any clamping part is arranged at an angle with the main body.

[0013] The structure is simple and easy to implement, that is, it is easy to realize snap connection and also convenient to disassemble.

[0014] Preferably, the clamping portion is provided with a penetration section and a clamping section, the penetration section and the clamping section are smoothly connected through an arc section convex toward another clamping portion, and the clamping section is connected to the main body;

[0015] The arc sections of the two clamping parts are close to each other.

[0016] The insertion section can easily insert the free end of the clamping part into the clamping position of the elastic clamping part. After further insertion, the clamping is achieved through the arc section. At the same time, since the clamping part and the main body are arranged at an angle, and the arc sections of the two clamping parts are close to each other, the sheets at the two clamping positions on the elastic clamping part are pressed against the ceramic rod and maintained in a pressed state, thereby achieving stable assembly performance based on the ceramic rod.

[0017] Preferably, among the clamping parts at both ends of the main body, one of them passes from the outer side of the elastic clamping part to the inner side, and the other passes from the inner side of the elastic clamping part to the outer side, or both pass from the outer side of the elastic clamping part to the inner side, or both pass from the inner side of the elastic clamping part to the outer side.

[0018] The structure is not limited to the clamping method of the clamp and the elastic clamping part, and has higher flexibility.

[0019] Preferably, the rotating member comprises:

[0020] Component one, the component one is used to connect the blades; and

[0021] Component two, component two and component one are detachably connected, the elastic clamping portion is arranged on component two, and component two is a sheet structure.

[0022] The rotating member is arranged as a split structure, so that the elasticity of the elastic clamping part can be well maintained. When the elastic force of the elastic clamping part is insufficient, the second component can be quickly replaced to ensure that a stable friction force can always be formed on the ceramic rod.

[0023] Preferably, among component one and component two, one of them is provided with a column, and the other is provided with a hole portion cooperating with the column.

[0024] The structure is simple and can facilitate the alignment and assembly of the sight component one and the component two.

[0025] Preferably, at least one of the component one and the component two is provided with a glue injection hole for connecting the component one and the component two by glue injection.

[0026] This structure can well ensure the stability of the fixed connection between component one and component two.

[0027] A camera module includes the piezoelectric variable aperture rotation structure as described above.

[0028] An electronic product, comprising the camera module as described above.

[0029] Compared with the prior art, the present invention ensures through a simple structure that when the piezoelectric component is energized, there is appropriate friction between the ceramic rod and the rotating part, thereby stably converting the axial movement of the ceramic rod into the rotational movement of the rotating part; due to the compact structure, the piezoelectric component is used to replace the stepper motor, thereby also being able to reduce the volume of the entire variable aperture motor, improve power density, and avoid or reduce electromagnetic interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 An exploded view of an embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of an embodiment of the present invention;

[0032] Figure 3 It is a schematic diagram of component one in the present invention;

[0033] Figure 4 It is a schematic diagram of component 2 in the present invention;

[0034] Figure 5 for Figure 4 Schematic diagram of the other direction;

[0035] Figure 6 is a schematic diagram of the card holder in the present invention;

[0036] Figure 7 This is a schematic diagram of an assembly of the clip in the present invention;

[0037] Figure 8This is a schematic diagram of an assembly of the clip in the present invention;

[0038] Fig. 9 The figure is a schematic diagram of assembling the clamp in the present invention.

[0039] In the figure: 1-rotating member; 2-piezoelectric component; 3-clamp; 4-elastic clamping part; 5-side wall one; 6-side wall two; 7-clamping hole one; 8-clamping hole two; 9-main body; 10-penetration section; 11-clamping section; 12-arc section; 13-component one; 14-component two; 15-column; 16-hole; 17-glue injection hole. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0041] like Figure 1 to Figure 6 As shown, a variable aperture rotation structure includes a rotating member 1, a piezoelectric component 2 and a clamp 3; the rotating member 1 is provided with an elastic clamping portion 4 extending to one side thereof; the ceramic rod of the piezoelectric component 2 extends into the elastic clamping portion 4; the clamp 3 clamps the elastic clamping portion 4 to clamp the ceramic rod of the piezoelectric component 2.

[0042] An orthogonal coordinate system XYZ is established so that the rotating member 1 in this embodiment can only rotate along the Z axis. The position of the piezoelectric end of the piezoelectric component 2 is determined. After the piezoelectric component 2 is powered on, the ceramic rod expands and contracts along the X axis. This embodiment obtains the motion capability by stimulating the piezoelectric end of the piezoelectric component 2 to obtain the inertial impact force or torque. Figure 2 As shown, taking the case where the piezoelectric component 2 is supplied with voltage to make the rotating part 1 rotate clockwise as an example, the inertial driven motion process mainly includes two stages: slow extension and rapid recovery. When the driving voltage acts on the piezoelectric component 2, the piezoelectric component 2 is slowly extended by the rising edge voltage. Since the friction force on the elastic clamping part 4 is greater than its inertia force, the piezoelectric component 2 pushes the rotating part 1 to rotate slowly on the basis that the rotating part 1 can only rotate along the Z axis. When the driving voltage reaches the peak value and disappears quickly, that is, when the voltage is at the falling edge, the ceramic rod quickly returns to the initial position. Since the friction force on the elastic clamping part 4 is less than its inertia force, the rotating part will remain in place, thereby achieving stable and accurate rotation of the rotating part 1 in the process of repeated power on and off. It should be noted that in order to achieve slow extension and rapid retraction, the voltage applied to the piezoelectric component 2 should be a sawtooth waveform. Although the force and displacement generated by the piezoelectricity are very small in the above process, a larger rotation angle between the rotating part 1 can be achieved in the process of the piezoelectric component 2 constantly obtaining and losing voltage.

[0043] Therefore, it can be understood that if the rotating member 1 is rotated counterclockwise, the ceramic rod of the piezoelectric component 2 will extend quickly and recover slowly. It can also be known that in some embodiments, the clamp 3 clamps the elastic clamping part 4 to deform the elastic clamping part and squeeze the ceramic rod of the piezoelectric component 2 to achieve clamping. Of course, if the diameter of the ceramic rod of the piezoelectric component 2 is consistent with the size of the elastic clamping part 4, it is also possible to directly clamp through the clamp 3.

[0044] like Figure 1 and Figure 5 As shown, in this embodiment, the elastic clamping part 4 is a continuous multiple bending structure, and a receiving space is formed at the free end of the elastic clamping part 4. The receiving space has opposite side walls 1 5 and 2 6. The clamp 3 is clamped on the side walls 1 5 and 2 6 to enclose the receiving space, and the side walls 1 5 and 2 6 press the ceramic rod of the piezoelectric component 2 located in the receiving space. The side walls 1 5 and 2 6 are respectively provided with a clamping hole 1 7 and a clamping hole 2 8, and the clamping hole 1 7 and the clamping hole 2 8 are respectively clamped with the two free ends of the clamp 3. In this embodiment, usually after the ceramic rod extends into the receiving space, the side walls 1 5 and 2 6 can realize the tightening of the ceramic rod, but the tightening force is unstable. Therefore, after the clamp 3 is clamped, in addition to preventing the ceramic rod from being separated from the elastic clamping part 4, the side walls 1 5 and 2 6 can further realize the pressurization of the ceramic rod. In other words, after the clamp 3 is engaged, the two free ends of the clamp 3 are retracted inward, thereby pulling the side wall 1 5 and the side wall 2 6 closer to each other, thereby increasing the clamping force between the side wall 1 5 and the side wall 2 6 and the ceramic rod. Further, in this embodiment, the clamp 3 includes a main body 9, and both ends of the main body 9 are provided with engaging portions extending in the same direction for engaging the elastic clamping portion 4, and any engaging portion and the main body 9 are arranged at an angle. Since the distance between the side wall 1 5 and the side wall 2 6 remains unchanged in the initial state, the distance between the side wall 1 5 and the side wall 2 6 is reduced after the clamp 3 is engaged, thereby ensuring that a stable friction force is generated on the ceramic rod after the drive occurs.

[0045] like Figure 6 As shown, in this embodiment, the clamping part is provided with a penetration section 10 and a clamping section 11, and the penetration section 10 and the clamping section 11 are smoothly connected through an arc section 12 protruding toward the other clamping part, and the clamping section is connected to the main body 9; the arc sections 12 of the two clamping parts are close to each other. The penetration section 10 can make the clamping part conveniently inserted into the corresponding clamping hole. In the further insertion process, the two clamping parts move away from each other, and the side wall 1 5 and the side wall 2 6 are pulled closer by the restoring force. The protruding part formed in the arc section 12 can prevent the penetration section 10 from being separated from the clamping hole, thereby maintaining the clamping stability, and then ensuring the rotation stability of the rotating member 1.

[0046] In this embodiment, one of the clamping parts at both ends of the main body 9 passes from the outside of the elastic clamping part 4 to the inside, and the other passes from the inside of the elastic clamping part 4 to the outside, or both pass from the outside of the elastic clamping part 4 to the inside, or both pass from the inside of the elastic clamping part 4 to the outside. For the side wall 1 5 and the side wall 2 6 of the accommodating space of the elastic clamping part 4, the side where the side wall 1 5 and the side wall 2 6 are far away from each other is the outside, and the side where they are close to each other is the inside. Therefore, this embodiment can realize the clamping connection between the clamp 3 and the elastic clamping part 4 in at least four ways, such as Figure 7 As shown, one of them is that the clip 3 is buckled into the accommodating space from the outside of the elastic clamping part 4, such as Figure 8 As shown, one of them is that the clip 3 zips up the accommodating space from the inner side of the elastic clamping portion 4, such as Fig. 9 As shown, the other two types are that one engaging portion of the clip 3 is buckled from the outside, and the other engaging portion is locked from the inside.

[0047] like Figure 3 to Figure 5 As shown, in this embodiment, the rotating member 1 includes a component 13 and a component 2 14; the component 13 is used to connect the blades; the component 2 14 and the component 13 are detachably connected, and the elastic clamping portion 4 is arranged on the component 2 14, and the component 2 14 is a sheet structure. Further, in the component 13 and the component 2 14, one of them is provided with a column 15, and the other is provided with a hole portion 16 that cooperates with the column 15. In the component 13 and the component 2 14, at least one is provided with a glue injection hole 17, which is used for glue injection to connect the component 13 and the component 2 14. Specifically, the component 13 is provided with a column 15, and the component 2 14 is provided with a hole portion 16, or vice versa; in addition, the component 13 and the component 2 14 are both provided with a glue injection hole 17 to achieve positioning and glue injection, thereby improving process efficiency. Therefore, after positioning is achieved using the column 15 and the hole portion 16, the component 13 and the component 2 14 can be quickly bonded.

[0048] On the basis of the above embodiments, this embodiment discloses a camera module that can well realize the control of aperture size. Based on this, this embodiment also discloses an electronic product that can be applied to mobile phones, tablets, bracelets, watches, etc.

[0049] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A variable aperture rotation structure, characterized in that: include: A rotating member, wherein an elastic clamping portion is extended to one side of the rotating member; A piezoelectric component, wherein a ceramic rod of the piezoelectric component extends into the elastic clamping portion; as well as A clamp is clamped to the elastic clamping portion to clamp the ceramic rod of the piezoelectric component.

2. The variable aperture rotation structure according to claim 1, characterized in that: The elastic clamping portion is a continuous multiple-bending structure, and a accommodating space is formed at the free end of the elastic clamping portion. The accommodating space has opposite side walls one and two. The clip is clamped on side walls one and two to enclose the accommodating space, and side walls one and two are used to press the ceramic rod of the piezoelectric component located in the accommodating space.

3. The variable aperture rotation structure according to claim 1, characterized in that: The clamp comprises a main body, and two ends of the main body are provided with clamping parts extending in the same direction and used for clamping the elastic clamping parts, and any clamping part is arranged at an angle with the main body.

4. The variable aperture rotation structure according to claim 3, characterized in that: The clamping portion is provided with a penetration section and a clamping section, the penetration section and the clamping section are smoothly connected through an arc section convex toward another clamping portion, and the clamping section is connected to the main body; The arc sections of the two clamping parts are close to each other.

5. The variable aperture rotation structure according to claim 3, characterized in that: Among the clamping parts at both ends of the main body, one of them passes from the outer side of the elastic clamping part to the inner side, and the other passes from the inner side of the elastic clamping part to the outer side, or both pass from the outer side of the elastic clamping part to the inner side, or both pass from the inner side of the elastic clamping part to the outer side.

6. A variable aperture rotation structure according to any one of claims 1 to 5, characterized in that: The rotating member comprises: Component one, the component one is used to connect the blades; and Component two, component two and component one are detachably connected, the elastic clamping portion is arranged on component two, and component two is a sheet structure.

7. The variable aperture rotation structure according to claim 6, characterized in that: In the first component and the second component, one of them is provided with a column, and the other is provided with a hole portion that matches with the column.

8. The variable aperture rotation structure according to claim 6, characterized in that: At least one of the component one and the component two is provided with a glue injection hole for connecting the component one and the component two by glue injection.

9. A camera module, characterized in that: It comprises the piezoelectric variable aperture rotation structure as described in any one of claims 1 to 8.

10. Electronic product, characterized in that, Comprising the camera module as described in claim 9.

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