Lens driving mechanism, camera module and electronic equipment

Abstract

The utility model relates to a lens driving mechanism, a camera module and an electronic device, comprising a bearing body, a moving body slidably connected with the bearing body through two groups of guide assemblies, and a driving assembly for driving the moving body to linearly move in the optical axis direction, at least part of the guide assembly is arranged between the bearing body and the movable body; the lens driving mechanism further comprises a guiding and stabilizing structure used for enabling the moving body to keep linear track movement, and the guiding and stabilizing structure is located between the two guiding assemblies. The mechanism has the advantages that a guide stabilizing structure is utilized, so that the moving body has stable pressure in the moving process, the stable moving effect is achieved, and the consequence of unclear imaging caused by interference caused by external factors is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of mobile phone camera equipment, and in particular relates to a lens driving mechanism, a camera module and electronic equipment. Background Art

[0002] In order to achieve a long stroke to ensure telephoto and macro effects at the same time, the existing periscope AF will have insufficient electromagnetic driving force. At the same time, the long stroke needs to be matched with high-precision electromagnetic components such as magnetic grating + TMR, which leads to a large product size.

[0003] Patent CN217981978U discloses a periscope lens driving device, which includes a base, a housing and a carrier, wherein the base is provided with a plurality of guide posts and at least one set of coils. The housing is connected to the top of the base and cooperates with the base to form a receiving space. The carrier is installed in the receiving space, and the carrier is provided with a lens mounting hole and a plurality of guide holes, which respectively penetrate the two opposite sides of the carrier, and the lens mounting hole is used to install the lens, and the plurality of guide holes respectively accommodate a plurality of guide posts, and the extension direction of the guide holes is parallel to the optical axis direction of the lens. The carrier is also provided with at least one magnet group and at least one sensor, and the magnet group and the coil are arranged relative to each other, and the coil cooperates with the magnet group to drive the carrier to move along the guide post. The periscope lens driving device of the utility model can drive the lens to move along the optical axis direction, and can accurately adjust the focal length of the lens to meet market demand.

[0004] In the above patent, the slide rail assembly is designed to penetrate the moving body. If the two are seamlessly slidably connected, the contact area between them is large. The effect of this friction will increase energy consumption, increase wear, and reduce the efficiency of the system. If there is a gap between the two, it will make it difficult for the object to remain stable while moving, thereby reducing the precision and accuracy of the movement, and it will shake or deviate when moving along the guide rail. Utility Model Content

[0005] The purpose of the utility model is to provide a lens driving mechanism, a camera module and an electronic device that can solve the above technical problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The lens driving mechanism comprises a carrier and a moving body slidably connected to the carrier through a guide assembly, and a driving assembly driving the moving body to move linearly in the direction of the optical axis, wherein the guide assembly has two groups, and at least part of the guide assembly is arranged between the carrier and the moving body; the lens driving mechanism also comprises a guiding stabilizing structure for enabling the moving body to maintain linear trajectory motion, wherein the guiding stabilizing structure is located between the two groups of the guiding assemblies, and wherein the guiding stabilizing structure comprises a first stabilizing member arranged on the carrier, and a second stabilizing member is arranged on the moving body and is magnetically attracted to the first stabilizing member and enables the moving body to be tightly attached to the part of the guiding assembly located between the carrier and the moving body.

[0008] Furthermore, the guide assembly includes any one of a guide rod guide assembly and a ball guide assembly or a combination of both.

[0009] Furthermore, the guide assembly includes a guide rod fixed on the carrier, a guide groove in contact with the guide rod is provided on the moving body, and the first stabilizer and the second stabilizer are magnetically adsorbed so that the guide rod is always in contact with the guide groove.

[0010] Furthermore, the driving assembly is provided with two groups, and the driving assembly includes a driving coil fixed on the carrier, and a driving magnet is provided on the moving body and is spaced apart from the driving coil. The direction along which the driving coil and the driving magnet are spaced apart is a first axis direction perpendicular to the optical axis direction, and the direction along which the first stabilizer and the second stabilizer are spaced apart is a second axis direction perpendicular to both the optical axis direction and the first axis direction. The two driving magnets are respectively arranged on two opposite side walls of the moving body along the first axis direction, and the guide assembly is located between the two groups of driving assemblies.

[0011] Furthermore, the lens driving mechanism also includes a position detection electronic component. Under the projection in the second axis direction, the position detection electronic component and the guide component are both located within the range of the farthest distance between the two driving magnets along the first axis direction.

[0012] Furthermore, the position detection electronic component is arranged on the side of one group of guide components away from the other group of guide components, the moving body is provided with an installation groove, and the position detection electronic component includes a magnetic grid completely arranged in the installation groove and a magnetoresistive sensor fixedly arranged on the carrier.

[0013] Furthermore, one of the first stabilizing member and the second stabilizing member is a monopolar magnet or a bipolar magnet made of magnet, and the other is made of a metal material that can be attracted to the magnetic material.

[0014] Furthermore, the moving body is provided with a metal magnetizing component in contact with the driving magnet, and the second stabilizing component and the metal magnetizing component are connected as an integral structure and embedded in the moving body.

[0015] The present application also provides a camera module, which includes the lens driving mechanism.

[0016] The present application also provides an electronic device, which includes the camera module.

[0017] Compared with the existing technology, the advantages of the present application are: the present mechanism utilizes a guiding stable structure so that the moving body has a stable pressure during the movement, thereby achieving the effect of stable movement, and at the same time, can reduce the size to meet the requirements of miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. A is a top view of the main structure of the lens driving mechanism of the present utility model;

[0019] Figure 2 for Figure 2 A cross-sectional view of the AA section of the middle lens drive mechanism;

[0020] Figure 3 for Figure 3 A magnified view of the detailed structure of the lens drive mechanism in the middle B area;

[0021] Figure 4 This is an independent front view of the structure of the lens driving mechanism of the utility model;

[0022] Figure 5 FIG. B is a top view of the main structure of the lens driving mechanism of the present utility model;

[0023] Figure 6 for Figure 5 a cross-sectional view of the lens drive mechanism at section BB;

[0024] Figure 7 for Figure 5 A cross-sectional view of the CC section of the lens drive mechanism;

[0025] Figure 8 This is an overview diagram of an electronic device of the present utility model.

[0026] In the figure, the carrier 1, the guide assembly 10, the guide rod 101, the fixed groove 102, the first stabilizing member 11, the moving body 2, the driving assembly 20, the driving coil 201, the driving magnet 202, the second stabilizing member 21, the guide groove 22, the contact groove wall 220, the metal magnetizing member 23, the metal cover plate 24, the mounting groove 25, the magnetic grid 26, the magnetoresistive sensor 27, the yoke plate 28, the transition connection member 3, and the optical axis X. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] Embodiment 1

[0029] like Figure 1-Figure 3 As shown, the lens driving mechanism includes a carrier 1 and a moving body 2 slidably connected to the carrier 1 through a guide assembly 10, and a driving assembly 20 for driving the moving body 2 to move linearly in the direction of the optical axis X, the guide assembly 10 has two groups, and at least part of the guide assembly 10 is arranged between the carrier 1 and the moving body 2; the lens driving mechanism also includes a guiding stabilizing structure for allowing the moving body 2 to maintain linear trajectory movement, the guiding stabilizing structure is located between the two groups of guiding assemblies 10, and the guiding stabilizing structure includes a first stabilizing member 11 arranged on the carrier 1, and a second stabilizing member 21 is provided on the moving body 2, which is magnetically attracted to the first stabilizing member 11 and makes the moving body 2 close to the part of the guiding assembly 10 located between the carrier 1 and the moving body 2.

[0030] The first stabilizing member 11 and the second stabilizing member 21 are magnetically attracted to create a magnetic adsorption force between the moving body 2 and the supporting body 1, so that the relatively moving moving body 2 can maintain linear motion on the same horizontal plane during linear motion. In this embodiment, the first stabilizing member 11 is arranged on the supporting body 1, and the second stabilizing member 21 is arranged on the moving body 2, and the two are spaced apart in space.

[0031] In this embodiment, the first stabilizer 11 is a magnet group, and the second stabilizer 21 is a metal member attracted by a magnet. In other embodiments, the first stabilizer 11 can be a metal member attracted by a magnet, and the second stabilizer 21 is a magnet group.

[0032] The guide assembly 10 includes any one of a guide rod guide assembly and a ball guide assembly or a combination of the two.

[0033] In this embodiment, the guide assembly 10 is a guide rod guide assembly. The advantage of this design is that the guide rod can limit the relative position of the parts, ensure that the contact surface and gap between the parts meet the specified requirements, and improve the assembly accuracy; the guide rod can limit the movement direction of the mechanism or parts, reduce the error in the movement direction, ensure the accuracy of the movement trajectory, and improve the stability of the movement.

[0034] The design of the ball guide assembly has the advantages of low cost and smaller contact area when the moving body 2 moves.

[0035] like Figure 4As shown, each guide assembly 10 includes a guide rod 101 fixed on the carrier 1, a guide groove 22 in contact with the guide rod 101 is provided on the moving body 2, and the first stabilizer 11 and the second stabilizer 21 are magnetically adsorbed so that the guide rod 101 is always in contact with the guide groove 22.

[0036] The moving body 2 and the guide rod 101 are always in contact and sliding relationship under the working environment.

[0037] The driving assembly 20 is provided with two groups, and the driving assembly includes a driving coil 201 fixed on the carrier 1, and a driving magnet 202 arranged on the moving body 2 and spaced apart from the driving coil 201. The direction along which the driving coil 201 and the driving magnet 202 are spaced apart is a first axis direction perpendicular to the optical axis X direction, and the direction along which the first stabilizing member 11 and the second stabilizing member 21 are spaced apart is a second axis direction perpendicular to both the optical axis X direction and the first axis direction. The two driving magnets 202 are respectively arranged on two opposite side walls of the moving body 2 along the first axis direction, and the guide assembly 10 is located between the two groups of driving assemblies 20. In this embodiment, the two guide rods 101 are respectively close to the two sides of the moving body 2 along the first axis direction, and the first stabilizing member 11 and the second stabilizing member 21 are both arranged between the two guide rods 101. In other embodiments, the driving coil 201 can be fixed to the side wall of the moving body 2 along the first axis direction, and the driving magnet 202 can be spaced apart from the driving coil 201 and fixed on the carrier 1.

[0038] In this embodiment, two groups of driving components 20 are symmetrically distributed on both sides of the moving body 2, and each group of driving magnets 202 can be a bipolar magnet, and each group of driving coils 201 is composed of at least one coil.

[0039] During operation, the driving coil 201 is energized to generate electromagnetic force, which in turn drives the moving body 2 to move along the optical axis X direction on the guide rod 101 .

[0040] The lens driving mechanism also includes a position detection electronic component. Under the projection in the second axis direction, the position detection electronic component and the guide component 10 are both located within the range of the farthest distance between the two driving magnets 202 along the first axis direction. In the first axis direction, the position detection electronic component and the guide component 10 do not exceed the side opposite to the driving magnets 202 on both sides.

[0041] The position detection electronic component is used to detect the position information of the moving body 2 and transmit the signal to the system. The system then controls the lens driving mechanism according to the data to correct the position of the moving body 2.

[0042] like Figure 5-Figure 7As shown, the position detection electronic component is arranged on the side of one group of guide components 10 away from the other group of guide components 10. In this embodiment, the moving body 2 is provided with a recessed mounting groove 25 on the bottom surface in the second axis direction and on the side of one guide rod 101 away from the other guide rod 101. The position detection electronic component includes a magnetic grid 26 completely arranged in the mounting groove 25 and a magnetoresistive sensor 27 fixedly arranged on the carrier 1. The boundary of the magnetic grid 26 along the first axis direction is within the boundary of the moving body 2 along the first axis direction. The mounting groove 25 can be arranged directly below the driving magnet 202. By using the first stabilizing member 11 and the second stabilizing member 21 arranged between the two guide rods 101, a larger space can be provided for the product. In this embodiment, a large-stroke motor is required. A large-stroke motor requires a larger stroke and precision and requires the layout of more position detection electronic components. Then, by using the guiding stabilizing structure arranged at the bottom of the moving body 2, a larger space can be released, thereby reducing the size of the lens driving mechanism along the first axis direction, which is different from the structure that uses the attraction between the driving magnet 202 and the guide rod 101 to achieve the guiding stabilization effect. In some other embodiments, the position detection electronic components can also be a Hall sensor and an induction magnet. One of the induction magnet or the Hall sensor is set at the bottom of the moving body 2, and the other is set on the carrier 1. The induction magnet or the Hall sensor set at the bottom of the moving body 2 does not exceed the boundary of the moving body 2 in the second axis direction.

[0043] In some embodiments, a yoke plate 28 bent at a right angle may be disposed in the mounting groove 25, one side wall of the yoke plate 28 is parallel to the bottom wall of the moving body 2 extending along the optical axis X direction, and the other side wall is parallel to the side wall of the moving body 2 on which the driving magnet 202 is disposed, and the magnetic grid 26 is disposed in the space enclosed by the yoke plate 28.

[0044] One of the first stabilizer 11 and the second stabilizer 21 is a monopolar magnet or a bipolar magnet made of magnet, and the other is made of a metal material that can be attracted to a magnetic material. In actual situations, the size of the magnet can be adjusted to change the magnetic attraction between the first stabilizer 11 and the second stabilizer 21 according to the actual required magnetic attraction.

[0045] The first stabilizing member 11 and the second stabilizing member 21 attract each other so that the moving body 2 can always be located on the guide assembly.

[0046] In this embodiment, the moving body 2 is provided with a metal magnetizing member 23 in contact with the driving magnet 202, and the second stabilizing member 21 and the metal magnetizing member 23 are connected as an integral structure and embedded in the moving body 2. The connection between the two also increases the overall structural strength of the moving body 2 and improves the service life of the entire device. The first stabilizing member 11 is a magnet and is fixed to the carrier 1.

[0047] In other embodiments, the first stabilizer 11 is made of metal material and fixed to the carrier 1, and the second stabilizer 21 is a magnet and fixed to the bottom of the moving body 2 along the second axis. In order to place the first stabilizer 11 or the second stabilizer 21 made of a magnet, a concave groove can be provided on the opposite side of the moving body 2 or the carrier 1.

[0048] Working principle:

[0049] When light enters the lens drive mechanism, the system will analyze the specific situation and control the drive component 20, which will then drive the moving body 2 to move back and forth along the optical axis to achieve the focusing effect. Due to the existence of the guiding stable structure, the moving body 2 can maintain a stable moving state due to the action of magnetic force during the movement process and will not be separated due to external interference.

[0050] Embodiment 2

[0051] The structure and principle of this embodiment are basically the same as those of the first embodiment, and the different structure is that, with respect to the lens driving mechanism of the first embodiment, the camera module of this embodiment includes a lens driving mechanism.

[0052] The camera module also includes a prism drive device.

[0053] The prism driving device is arranged on the incident light side of the lens in the lens driving device. The prism driving device utilizes the prism group inside the prism driving device to refract the light and then allows the light to enter the lens driving device.

[0054] Embodiment 3

[0055] The structure and principle of this embodiment are basically the same as those of the second embodiment, and the different structure is that, with respect to the camera module of the second embodiment, the electronic device of this embodiment includes a camera module.

[0056] like Figure 8 As shown, the electronic equipment in this embodiment includes 3C products, such as computers, mobile smart phones and digital cameras. In this embodiment, the device is used as a periscope camera imaging component of a mobile smart phone.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A lens driving mechanism, comprising a carrier (1), a moving body (2) slidably connected to the carrier (1) via a guide assembly (10), and a driving assembly (20) for driving the moving body (2) to move linearly in the direction of an optical axis (X), characterized in that: The guide assembly (10) has two groups, and at least part of the guide assembly (10) is arranged between the carrier (1) and the moving body (2); the lens driving mechanism also includes a guide stabilizing structure for allowing the moving body (2) to maintain linear trajectory movement, and the guide stabilizing structure is located between the two groups of the guide assemblies (10), and the guide stabilizing structure includes a first stabilizing member (11) arranged on the carrier (1), and a second stabilizing member (21) is arranged on the moving body (2) and is magnetically attracted to the first stabilizing member (11) so that the moving body (2) is tightly attached to the part of the guide assembly (10) located between the carrier (1) and the moving body (2).

2. The lens driving mechanism according to claim 1, characterized in that: The guide assembly (10) comprises any one of a guide rod guide assembly and a ball guide assembly or a combination of the two.

3. The lens driving mechanism according to claim 1 or 2, characterized in that: The guide assembly (10) comprises a guide rod (101) fixed on the carrier (1); a guide groove (22) in contact with the guide rod (101) is provided on the moving body (2); the first stabilizing member (11) and the second stabilizing member (21) are magnetically adsorbed so that the guide rod (101) is always in contact with the guide groove (22).

4. The lens driving mechanism according to claim 1, characterized in that: The driving assembly (20) is provided with two groups, the driving assembly comprising a driving coil (201) fixed on the carrier (1), and a driving magnet (202) arranged on the moving body (2) and spaced apart from the driving coil (201); the direction along which the driving coil (201) and the driving magnet (202) are spaced apart is a first axis direction perpendicular to the optical axis (X) direction; the direction along which the first stabilizing member (11) and the second stabilizing member (21) are spaced apart is a second axis direction perpendicular to both the optical axis (X) direction and the first axis direction; the two driving magnets (202) are respectively arranged on two opposite side walls of the moving body (2) along the first axis direction; and the guide assembly (10) is located between the two groups of driving assemblies (20).

5. The lens driving mechanism according to claim 4, characterized in that: The lens driving mechanism also includes a position detection electronic component. Under the projection in the second axis direction, the position detection electronic component and the guide component (10) are both located within the range of the farthest distance between the two driving magnets (202) along the first axis direction.

6. The lens driving mechanism according to claim 5, characterized in that: The position detection electronic component is arranged on a side of one group of guide components (10) facing away from the other group of guide components (10), the moving body (2) is provided with a mounting groove, and the position detection electronic component comprises a magnetic grid completely arranged in the mounting groove and a magnetoresistive sensor fixedly arranged on the carrier (1).

7. The lens driving mechanism according to claim 4, characterized in that: One of the first stabilizing member (11) and the second stabilizing member (21) is a monopolar magnet or a bipolar magnet made of magnet, and the other is made of a metal material that can attract the magnetic material.

8. The lens driving mechanism according to claim 7, characterized in that: The moving body (2) is provided with a metal magnetizing component (23) in contact with the driving magnet (202); the second stabilizing component (21) and the metal magnetizing component (23) are connected to form an integral structure and embedded in the moving body (2).

9. A camera module, characterized in that: The camera module includes the lens driving mechanism described in any one of claims 1-8.

10. An electronic device, characterized in that The electronic device includes the camera module described in claim 9.

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