Lens structure and shooting equipment

Abstract

The invention discloses a lens structure and shooting equipment, and relates to the technical field of lenses, the lens structure comprises a mounting cylinder, a plurality of lens groups, an electromagnetic driving mechanism and a sliding fit mechanism, and the plurality of lens groups comprise an adjusting lens group movably mounted in the mounting cylinder along a first direction; the electromagnetic driving mechanism comprises an induction coil and a magnetic circuit assembly, at least part of the induction coil is located in a magnetic field formed by the magnetic circuit assembly, and when the induction coil is powered on and acts on the magnetic circuit assembly, the adjusting lens group can move relative to the mounting cylinder under the magnetic induction effect; the sliding fit mechanism comprises a rolling part and a first fit part, the first fit part can be in close contact with the rolling part, the sliding fit mechanism further comprises an adsorption part and a second fit part, and the adsorption part always acts on the second fit part to generate an acting force which is close to each other, so that the rolling part rolls in the sliding contact process of the rolling part and the first fit part. The scheme improves the problem that the lens is easy to fatigue, and improves the stability of the lens.

Description

Technical Field

[0001] The present invention relates to the field of lens technology, and in particular to a lens structure and shooting equipment. Background Art

[0002] VCM is a motor that uses electromagnetic principles to generate linear or rotational motion. In digital cameras, mobile phone cameras and other devices, VCM is used to drive the lens for fast and accurate focusing. By adjusting the position of the lens, VCM can make the image focus clearly on the sensor, with the advantages of high precision, fast response and low noise.

[0003] Existing lenses usually use a VCM structure to achieve the movement of the focus system. Long-term high-frequency movement will bring a large dynamic load to the motor, resulting in a reduction in the life of the motor. Summary of the invention

[0004] The main purpose of the present invention is to provide a lens structure and a shooting device, aiming to improve the problem that the existing lens is prone to shortening its life after long-term operation.

[0005] To achieve the above object, the present invention provides a lens structure, comprising: A mounting tube having a mounting channel extending along a first direction; A plurality of lens groups, including an adjustment lens group movably mounted in the mounting channel along a first direction; The electromagnetic drive mechanism includes an induction coil and a magnetic circuit assembly, one of which is fixedly mounted on the mounting tube, and the other is fixedly mounted on the adjusting mirror group, the induction coil is at least partially located in the magnetic field formed by the magnetic circuit assembly, and when the induction coil is energized and acts on the magnetic circuit assembly, the adjusting mirror group can move relative to the mounting tube under the action of magnetic induction; and The sliding fitting mechanism includes a rolling portion and a first fitting portion, one of which is fixedly arranged on the mounting tube, and the other is fixedly arranged on the adjusting lens group, and the first fitting portion can be in close contact with the rolling portion. The sliding fitting mechanism also includes an adsorption portion and a second fitting portion, one of which is fixedly arranged on the mounting tube, and the other is fixedly arranged on the adjusting lens group, and the adsorption portion always acts on the second fitting portion with a force that approaches each other, so that the rolling portion rolls during the sliding contact between the rolling portion and the first fitting portion.

[0006] In one embodiment, the rolling portion comprises: A mounting seat, wherein a first groove extending along a first direction is provided on a side surface of the mounting seat opposite to the adjusting lens group; and A plurality of balls are closely arranged in the first groove along a first direction, and a portion of each of the balls protrudes from the first groove; The first mating portion includes a slider having a second groove extending along a first direction, and a notch of the second groove is arranged opposite to a notch of the first groove so as to abut against exposed portions of the plurality of balls so that the plurality of balls can roll during the sliding contact between the slider and a portion of the plurality of balls.

[0007] In one embodiment, the groove walls of the first groove opposite to each other in the second direction are arranged to be inclined outwardly toward the second groove; and / or, The groove walls of the second groove opposite to each other in the second direction are arranged to be inclined outwardly toward the first groove.

[0008] In one embodiment, the mounting tube and the adjusting mirror assembly are respectively provided with a guide shaft and a guide hole that cooperate with each other, and the guide shaft and the guide hole are clearance-matched so that within the clearance range, the plurality of balls are still located between the first groove and the second groove.

[0009] In one embodiment, the mounting tube and the adjusting lens assembly are respectively provided with guide shafts and guide holes that cooperate with each other.

[0010] In one embodiment, the magnetic circuit assembly is fixedly mounted on the mounting tube and is located to the side of the adjusting lens group in the second direction, and the induction coil is fixedly mounted on the adjusting lens group; The magnetic circuit assembly comprises: a yoke arranged in an annular shape to have a first yoke section and a second yoke section extending in a first direction and spaced apart in a second direction, wherein the first yoke section is fixed to the mounting tube; and A magnet is extended along a first direction and installed on a side of the first yoke section away from the installation cylinder, with an installation gap formed between the magnet and the second yoke section; The induction coil is sleeved on the periphery of the second magnetic yoke section and is at least partially located in the installation gap.

[0011] In one embodiment, two magnetic circuit components are provided and are respectively located on two sides of the adjusting mirror group in the second direction.

[0012] In one embodiment, the lens structure further includes a magnetic grid extending along a first direction and a read head corresponding to the magnetic grid, one of which is fixed to the mounting tube, and the other is fixed to the adjustment lens group, so that during the relative movement of the mounting tube and the adjustment lens group, the read head calculates the displacement relative to the magnetic grid based on the magnetic field at different positions of the magnetic grid.

[0013] In one embodiment, the adsorption portion includes an adsorption magnet, and the second matching portion includes a metal sheet.

[0014] The present invention further provides a photographing device, comprising the above-mentioned lens structure, wherein the lens structure comprises: A mounting tube having a mounting channel extending along a first direction; A plurality of lens groups, including an adjustment lens group movably mounted in the mounting channel along a first direction; The electromagnetic drive mechanism includes an induction coil and a magnetic circuit assembly, one of which is fixedly mounted on the mounting tube, and the other is fixedly mounted on the adjusting mirror group, the induction coil is at least partially located in the magnetic field formed by the magnetic circuit assembly, and when the induction coil is energized and acts on the magnetic circuit assembly, the adjusting mirror group can move relative to the mounting tube under the action of magnetic induction; and The sliding fitting mechanism includes a rolling portion and a first fitting portion, one of which is fixedly arranged on the mounting tube, and the other is fixedly arranged on the adjusting lens group, and the first fitting portion can be in close contact with the rolling portion. The sliding fitting mechanism also includes an adsorption portion and a second fitting portion, one of which is fixedly arranged on the mounting tube, and the other is fixedly arranged on the adjusting lens group, and the adsorption portion always acts on the second fitting portion with a force that approaches each other, so that the rolling portion rolls during the sliding contact between the rolling portion and the first fitting portion.

[0015] The technical solution of the present invention, by setting the magnetic circuit assembly and the induction coil, enables the induction coil to move relative to the magnetic circuit assembly in the energized state, thereby driving the adjustment lens group to move relative to the mounting tube, and realizing the movement of the focusing system in the lens structure. Further, by setting the sliding matching mechanism, wherein the sliding matching mechanism includes a first matching portion and a rolling portion, rolling friction occurs during the relative movement between the adjustment lens group and the mounting tube, and the rolling friction resistance generated by the traditional surface contact, line contact or even point contact is smaller, thereby improving the problem that the existing lens is prone to reduce its life after long-term operation. Furthermore, by setting the adsorption portion and the second matching portion, the rolling portion and the first matching portion are in close contact, ensuring the close matching of the first matching portion and the rolling portion, so that the adjustment lens group can move relative to the mounting tube in a predetermined direction, thereby improving the stability of the lens structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 A schematic structural diagram of an embodiment of a lens structure provided by the present invention; Figure 2 for Figure 1 Side view of the center adjustment mirror assembly; Figure 3 for Figure 1 Exploded diagram of the electromagnetic drive structure and sliding fit structure.

[0018] Description of Figure Numbers: 1000. Lens structure; 1. Mounting tube; 2. Adjusting lens group; 3. Electromagnetic drive mechanism; 31. Induction coil; 32. Magnetic circuit assembly; 321. yoke; 3211. First yoke section; 3212. Second yoke section; 322. Magnet; 4. Sliding fit mechanism; 41. Rolling part; 411. Mounting seat; 4111. First groove; 412. Ball; 42. First fit part; 421. Sliding block; 4211. Second groove; 43. Adsorption part; 44. Second fit part; 5. Guide shaft; 6. Guide hole; 7. Read head; 8. Magnetic grid.

[0019] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] VCM is a motor that uses electromagnetic principles to generate linear or rotational motion. In digital cameras, mobile phone cameras and other devices, VCM is used to drive the lens for fast and accurate focusing. By adjusting the position of the lens, VCM can make the image focus clearly on the sensor, with the advantages of high precision, fast response and low noise.

[0024] Existing lenses usually use a VCM structure to achieve the movement of the focus system. Long-term high-frequency movement will bring a large dynamic load to the motor, resulting in a reduction in the life of the motor.

[0025] The main purpose of the present invention is to provide a lens structure and a shooting device, aiming to improve the problem that the existing lens is prone to shortening its life after long-term operation.

[0026] See also Figure 1 and Figure 2The present invention proposes a lens structure 1000, comprising a mounting tube 1, a plurality of lens groups, an electromagnetic driving mechanism 3 and a sliding matching mechanism 4, wherein the mounting tube 1 has a mounting channel extending along a first direction, the plurality of lens groups include an adjusting lens group 2 movably mounted in the mounting channel along the first direction, the electromagnetic driving mechanism 3 includes an induction coil 31 and a magnetic circuit component 32, one of which is fixedly arranged on the mounting tube 1, and the other is fixedly arranged on the adjusting lens group 2, the induction coil 31 is at least partially located in a magnetic field formed by the magnetic circuit component 32, and when the induction coil 31 is energized to interact with the magnetic circuit component 32, the adjusting lens group 2 can The sliding fitting mechanism 4 moves relative to the mounting tube 1 under the action of magnetic induction, and includes a rolling portion 41 and a first fitting portion 42, one of which is fixedly arranged on the mounting tube 1, and the other is fixedly arranged on the adjusting lens group 2, and the first fitting portion 42 can be in close contact with the rolling portion 41. The sliding fitting mechanism 4 also includes an adsorption portion 43 and a second fitting portion 44, one of which is fixedly arranged on the mounting tube 1, and the other is fixedly arranged on the adjusting lens group 2, and the adsorption portion 43 always acts on the second fitting portion 44 with a force approaching each other, so that the rolling portion 41 rolls during the sliding contact between the rolling portion 41 and the first fitting portion 42.

[0027] The technical solution of the present invention, by setting the magnetic circuit assembly 32 and the induction coil 31, makes the induction coil 31 move relative to the magnetic circuit assembly 32 in the power-on state, thereby driving the adjustment lens group 2 to move relative to the mounting tube 1, and realizing the movement of the focusing system in the lens structure 1000. Further, by setting the sliding matching mechanism 4, wherein the sliding matching mechanism 4 includes a first matching portion 42 and a rolling portion 41, rolling friction occurs during the relative movement between the adjustment lens group 2 and the mounting tube 1. Compared with the traditional surface contact, the rolling friction resistance generated by line contact or even point contact is smaller, thereby improving the problem that the existing lens is prone to reduce its life after long-term operation. Further, by setting the adsorption portion 43 and the second matching portion 44, the rolling portion 41 and the first matching portion 42 are in close contact, ensuring the close matching of the first matching portion 42 and the rolling portion 41, so that the adjustment lens group 2 can move relative to the mounting tube 1 in a predetermined direction, thereby improving the stability of the lens structure 1000.

[0028] It should be noted that the rolling portion 41 can be a needle roller, a roller, a wheel or other components, which are devices that use rolling motion to transmit force and reduce friction, and this solution does not limit this.

[0029] In the specific embodiments provided by the present invention, please refer to Figure 1 to Figure 2The rolling part 41 includes a mounting seat 411 and a plurality of balls 412. The mounting seat 411 is provided with a first groove 4111 extending along a first direction on a side opposite to the mounting seat 411 and the adjusting lens group 2. The plurality of balls 412 are closely arranged in the first groove 4111 along the first direction, and a portion of each ball 412 protrudes from the first groove 4111. The first matching part 42 includes a slider 421. The slider 421 is provided with a second groove 4211 extending along the first direction. The notch of the second groove 4211 is arranged opposite to the notch of the first groove 4111 to abut against the exposed portion of the plurality of balls 412, so that the plurality of balls 412 roll when the slider 421 is in sliding contact with a portion of the plurality of balls 412. Such a configuration is simple in structure and convenient for installation. Furthermore, the plurality of balls 412 can evenly share the load, reducing the force borne by each ball 412 , thereby reducing the load of a single ball 412 and extending the service life of the mounting seat 411 and the ball 412 .

[0030] It should be noted that there are very small gaps between the plurality of balls 412, so as to limit each ball 412 within a controllable range, and allow the ball 412 to have a slight displacement in the first direction, so as to facilitate its own rolling. It should also be noted that the ball 412 is only in contact with the mounting seat 411 and the slider 421. Due to the existence of the adsorption portion 43 and the second matching portion 44, when subjected to a large impact, the adjustment lens group 2 and the mounting tube 1 will be temporarily separated, so as to cope with the impact and play a buffering effect. In this process, since the ball 412 does not have a fixed matching relationship with the mounting seat 411 and the slider 421, the ball 412 will automatically roll to the gap between the mounting seat 411 and the slider 421 to ensure that the ball 412 and the slider 421 are always in contact.

[0031] It is understandable that the length of the slider 421 in the first direction is much greater than the length of the mounting seat 411 in the first direction, thereby ensuring that the ball 412 does not fall off when it is in the anti-gravity direction of the slider 421.

[0032] It should be noted that the present invention does not limit the specific structure of the adsorption portion 43 and the second matching portion 44. In one embodiment, the adsorption portion 43 includes a tension spring, and the second matching portion 44 includes a hook connected to the compression spring. Such a configuration has a simple structure and low cost, but long-term use may easily lead to spring fatigue and poor anti-interference performance. In a preferred embodiment of the present invention, the adsorption portion 43 includes an adsorption magnet, and the second matching portion 44 includes a metal sheet. Such a configuration has a high overall structural stability and strong anti-interference performance.

[0033] For further information, please refer to Figures 2 to 3 , the groove walls of the first groove 4111 opposite to each other in the second direction are arranged to be inclined outwardly toward the second groove 4211; and / or, the groove walls of the second groove 4211 opposite to each other in the second direction are arranged to be inclined outwardly toward the first groove 4111. It should be noted that the width of the notch of the first groove 4111 is smaller than the diameter of the ball 412, so that more than half of the volume of the ball 412 is exposed in the first groove 4111. With such a configuration, the ball 412 can be automatically positioned on the width of the first groove 4111 to prevent it from moving in the first groove 4111. At the same time, the groove wall of the first groove 4111 can be tangent to the surface of the ball 412, and the supporting force is perpendicular to the surface of the ball 412, thereby reducing damage to the ball 412. By arranging the groove wall of the second groove 4211 opposite to the first groove 4111 in the second direction to be inclined outwardly toward the first groove 4111, when the lens structure 1000 is impacted and the adjustment lens group 2 is temporarily separated from the mounting tube 1, the contact between the ball 412 and the slider 421 can still be ensured.

[0034] It is worth mentioning that the above two schemes can be set up one by one or at the same time, and this scheme does not make any specific restrictions.

[0035] In order to ensure that the adjustment lens assembly 2 and the mounting tube 1 are tightly matched, please refer to Figure 1 The mounting tube 1 and the adjusting lens group 2 are respectively provided with a guide shaft 5 and a guide hole 6 that cooperate with each other. The guide shaft 5 and the guide hole 6 are clearance-matched, so that within the clearance range, the plurality of the balls 412 are still between the first groove 4111 and the second groove 4211. Due to the existence of the adsorption portion 43 and the second matching portion 44, when subjected to a large impact, the adjusting lens group 2 and the mounting tube 1 will be temporarily separated, so as to cope with the impact and play a buffering effect. In this process, in order to ensure that the balls 412 do not fall off, it is necessary to limit the gap between the slider 421 and the mounting seat 411. By providing the guide shaft 5 and the guide hole 6 with clearance matching, the adjusting lens group 2 can move within a reasonable range relative to the mounting tube 1, while ensuring that the lens structure 1000 is impact-resistant, the stability between the various components is improved.

[0036] In one embodiment, the magnetic circuit assembly 32 is fixed to the mounting tube 1 and is located on the side of the adjustment lens group 2 in the second direction, and the induction coil 31 is fixed to the adjustment lens group 2; the magnetic circuit assembly 32 includes a yoke 321 and a magnet 322, the yoke 321 is arranged in an annular shape, and has a first yoke section 3211 and a second yoke section 3212 extending in the first direction and arranged at intervals in the second direction, the first yoke section 3211 is fixed to the mounting tube 1, the magnet 322 is extended in the first direction, and is installed on the side of the first yoke section 3211 away from the mounting tube 1, and an installation gap is formed between the magnet 322 and the second yoke section 3212; the induction coil 31 is sleeved on the periphery of the second yoke section 3212, and is at least partially located in the installation gap. By providing the yoke 321, the magnetic field lines can be guided to the desired position through magnetic conduction, thereby enhancing the strength of the magnetic field. The yoke 321 guides the magnetic field from one side of the magnet or induction coil 31 to the other side, so that the magnetic field can be more concentrated and powerful, thereby improving the effect of the electromagnetic force. The yoke 321 can help concentrate the magnetic field on the moving parts or working area. By designing and configuring the shape and size of the yoke 321, the magnetic field lines can pass through the target area more concentratedly, enhancing the scope and effect of the magnetic force, thereby improving the efficiency and performance of the electromagnetic drive mechanism 3. By being closely connected with the magnet 322, the yoke 321 can directly transfer the magnetic force generated by the magnetic field to the adjustment mirror group 2 to achieve force transmission and drive. The existence of the yoke 321 can reduce the leakage and loss of the magnetic field and improve the transmission efficiency of the magnetic force. By fixing and supporting the magnet 322, the yoke 321 can prevent the deviation and distortion of the magnetic field, maintain the stability and consistency of the magnetic field, and improve the stability and reliability of the system.

[0037] It is worth mentioning that in this embodiment, the magnet 322 is set to be a strong magnet to ensure that the temperature environment is met. The strong magnet can be a neodymium iron boron magnet 322, a cobalt boron magnet 322, an aluminum nickel cobalt magnet 322 or a soft magnet, etc. These strong magnet materials have different characteristics and application ranges. The specific selection needs to be comprehensively considered according to the magnetic field strength requirements, operating temperature range, long-term stability and other factors of the electromagnetic drive system. In practical applications, the most suitable strong magnet material is usually selected according to specific needs.

[0038] For further information, please refer to Figure 1 The magnetic circuit components 32 are provided with two and are respectively located on both sides of the adjusting mirror group 2 in the second direction. Such an arrangement makes the resultant force generated by the two magnetic circuit components 32 and the gravity of the adjusting mirror group 2 in a straight line, so that the uniformity of the force in the first direction can be maintained during the driving stroke of the adjusting mirror group 2.

[0039] In the embodiments provided by the present invention, please refer to Figures 2 to 3 The lens structure 1000 further includes a magnetic grid 8 extending along the first direction and a magnetic read head 7 corresponding to the magnetic grid 8, one of which is fixed to the mounting tube 1 and the other is fixed to the adjusting lens group 2, so that during the relative movement of the mounting tube 1 and the adjusting lens group 2, the magnetic read head 7 calculates the displacement relative to the magnetic grid 8 according to the magnetic field at different positions of the magnetic grid 8. The working principle of the magnetic grid 8 and the magnetic read head 7 is based on electromagnetic induction. When the magnetic read head 7 moves along the magnetic grid 8, due to the change in the magnetic field intensity, a corresponding voltage change will be generated in the magnetic read head 7. By processing these changes, the position information can be determined very accurately, and it also has the characteristics of fast response speed. The autofocus system in the lens is particularly dependent on the precise adjustment of the focus position, and has a high requirement for the focus speed, so that the user can capture the desired moment faster. The matching structure of the magnetic grid 8 and the magnetic read head 7 can just meet the above requirements.

[0040] The present invention also provides a shooting device, which includes the above-mentioned lens structure 1000. Since the shooting device includes the lens structure 1000, the specific structure of the lens structure 1000 refers to the above-mentioned embodiments. Since the lens structure 1000 of the present shooting device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0041] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A lens structure, characterized in that: include: A mounting tube having a mounting channel extending along a first direction; A plurality of lens groups, including an adjustment lens group movably mounted in the mounting channel along a first direction; The electromagnetic drive mechanism includes an induction coil and a magnetic circuit assembly, one of which is fixedly mounted on the mounting tube, and the other is fixedly mounted on the adjusting mirror group, the induction coil is at least partially located in the magnetic field formed by the magnetic circuit assembly, and when the induction coil is energized and acts on the magnetic circuit assembly, the adjusting mirror group can move relative to the mounting tube under the action of magnetic induction; and The sliding fitting mechanism includes a rolling portion and a first fitting portion, one of which is fixedly arranged on the mounting tube, and the other is fixedly arranged on the adjusting lens group, and the first fitting portion can be in close contact with the rolling portion. The sliding fitting mechanism also includes an adsorption portion and a second fitting portion, one of which is fixedly arranged on the mounting tube, and the other is fixedly arranged on the adjusting lens group, and the adsorption portion always acts on the second fitting portion with a force that approaches each other, so that the rolling portion rolls during the sliding contact between the rolling portion and the first fitting portion.

2. The lens structure according to claim 1, characterized in that: The rolling part comprises: A mounting seat, wherein a first groove extending along a first direction is provided on a side surface of the mounting seat opposite to the adjusting lens group; and A plurality of balls are closely arranged in the first groove along a first direction, and a portion of each of the balls protrudes from the first groove; The first mating portion includes a slider having a second groove extending along a first direction, and a notch of the second groove is arranged opposite to a notch of the first groove so as to abut against exposed portions of the plurality of balls so that the plurality of balls can roll during the sliding contact between the slider and a portion of the plurality of balls.

3. The lens structure according to claim 2, characterized in that: The groove walls of the first groove opposite to each other in the second direction are arranged to be inclined outwardly toward the second groove; and / or, The groove walls of the second groove opposite to each other in the second direction are arranged to be inclined outwardly toward the first groove.

4. The lens structure according to claim 2, characterized in that: The mounting tube and the adjusting mirror assembly are respectively provided with a guide shaft and a guide hole that cooperate with each other, and the guide shaft and the guide hole are clearance-matched so that within the clearance range, the plurality of balls are still located between the first groove and the second groove.

5. The lens structure according to claim 1, characterized in that: The mounting tube and the adjusting lens group are respectively provided with guide shafts and guide holes which cooperate with each other.

6. The lens structure according to claim 1, characterized in that: The magnetic circuit assembly is fixedly mounted on the mounting tube and is located to the side of the adjusting lens group in the second direction, and the induction coil is fixedly mounted on the adjusting lens group; The magnetic circuit assembly comprises: a yoke arranged in an annular shape to have a first yoke section and a second yoke section extending in a first direction and spaced apart in a second direction, wherein the first yoke section is fixed to the mounting tube; and A magnet is extended along a first direction and installed on a side of the first yoke section away from the installation cylinder, with an installation gap formed between the magnet and the second yoke section; The induction coil is sleeved on the periphery of the second magnetic yoke section and is at least partially located in the installation gap.

7. The lens structure according to claim 6, characterized in that: The magnetic circuit components are provided with two and are respectively located on two sides of the adjusting mirror group in the second direction.

8. The lens structure according to claim 1, characterized in that: The lens structure also includes a magnetic grid extending along a first direction and a read head corresponding to the magnetic grid, one of which is fixed to the mounting tube, and the other is fixed to the adjustment lens group, so that during the relative movement of the mounting tube and the adjustment lens group, the read head calculates the displacement relative to the magnetic grid according to the magnetic field at different positions of the magnetic grid.

9. The lens structure according to claim 1, characterized in that: The adsorption portion includes an adsorption magnet, and the second matching portion includes a metal sheet.

10. A photographing device, characterized in that: The lens structure comprises any one of claims 1 to 9.

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