Optical zoom lens and imaging apparatus

Abstract

The invention discloses an optical zoom lens and camera shooting equipment, and relates to the technical field of optical zoom systems.The optical zoom lens comprises a lens barrel, a zoom lens set and an electromagnetic driving structure, the lens barrel extends in the first direction, the zoom lens set is movably installed in the lens barrel in the first direction, and the electromagnetic driving structure is arranged in the lens barrel; the electromagnetic driving structure comprises a magnet structure and at least one induction coil which are respectively arranged in one of the lens cone and the zoom lens group, the magnet structure comprises a magnet yoke and two magnet groups which are arranged at intervals in a second direction, each magnet group comprises a plurality of magnets which are sequentially arranged along a first direction, and the magnetic pole directions of two adjacent magnets in each magnet group are opposite; the magnets are arranged in the first direction, the two corresponding magnets in the second direction attract each other, the two magnet sets form a magnetic field, at least part of the induction coil is located in the magnetic field, the projection of the induction coil in the second direction is at least located on the two magnets, and the induction coil can move relative to the magnet structure in the first direction. Therefore, the size of a single magnet can be reduced, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of optical zoom systems, and in particular to an optical zoom lens and a camera device. Background Art

[0002] With the rapid development of high-tech, security optical zoom lenses have been widely used, and stepper motors are widely used in the automatic zoom and focus of optical zoom lenses. The existing stepper motor drive mode has low speed, high power consumption, is easily affected by electromagnetic interference and noise, and has poor wear resistance. At the same time, the existing position sensing method adopts open-loop control, which can only sense one position through PI, has low control accuracy, and is prone to undesirable phenomena such as loss of step.

[0003] However, the existing driving structure of the optical zoom lens usually only adopts a single yoke, a single magnet and a single coil. This driving form has low magnetic field strength and small driving force. For scenarios with high driving force requirements, the cost of the magnet and yoke is too high. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical zoom lens and a camera device, aiming to solve the problem that the driving structure of the existing optical zoom lens will lead to excessively high costs of magnets and yokes in scenarios with high driving force requirements.

[0005] To achieve the above object, the optical zoom lens provided by the present invention comprises: The lens barrel is extended along the first direction; a zoom lens assembly, movably mounted in the lens barrel along a first direction; and The electromagnetic driving structure comprises a magnetic structure and at least one induction coil respectively arranged on one of the lens barrel and the zoom lens group, wherein the magnetic structure comprises a yoke and two magnet groups spaced apart in a second direction, the yoke is arranged in an annular shape and comprises two yoke sections spaced apart in the second direction, the two magnet groups are arranged in the two yoke sections, each of the magnet groups comprises a plurality of magnets sequentially arranged along a first direction, the magnetic poles of two adjacent magnets in each magnet group are arranged in opposite directions, and the magnetic poles of two corresponding magnets in the second direction in the two magnet groups are arranged to attract each other, the two magnet groups form a magnetic field, the winding center of the induction coil is extended along the second direction, the induction coil is at least partially located in the magnetic field, and the projection of the induction coil in the second direction is at least located on the two magnets of one of the magnet groups, and when the induction coil is energized to generate electromagnetic action with the magnetic structure, the induction coil can move relative to the magnetic structure along the first direction to drive the zoom lens group to move.

[0006] In one embodiment, the direction of the current in the induction coil is alternately changed when the induction coil moves along the first direction.

[0007] In one embodiment, a plurality of the induction coils are provided, and the plurality of the induction coils are spaced apart along the first direction.

[0008] In one embodiment, the distance between two adjacent induction coils is A, the size of each magnet in the first direction is B, (a-1) B<A<aB; Wherein, a is an odd number, and the current directions of two adjacent induction coils are arranged in opposite directions.

[0009] In one embodiment, the distance between two adjacent induction coils is A, the size of each magnet in the first direction is B, (a-1) B<A<aB; Wherein, a is an odd number, and the current directions of two adjacent induction coils are arranged in opposite directions.

[0010] In one embodiment, in each magnet group, two adjacent magnets are arranged with a gap.

[0011] In one embodiment, the optical zoom lens further includes a position determining structure, wherein the position determining structure includes a magnetic grating and a magnetic sensor, wherein the magnetic grating is extended along a first direction, and the magnetic sensor is movably arranged along the first direction relative to the magnetic grating, and the magnetic sensor is used to detect changes in the magnetic force of the magnetic grating during its movement to determine the position of the zoom lens group.

[0012] In one embodiment, the optical zoom lens further includes a guide structure, wherein the guide structure is movably connected to the zoom lens group to guide the movement of the zoom lens group along a first direction.

[0013] In one embodiment, the zoom lens assembly is provided with a through hole along the first direction; The guiding structure comprises: A mounting seat is fixedly mounted in the lens barrel; and A guide rod is extended along a first direction and is arranged on the mounting seat, and the guide rod is arranged through the through hole to slideably cooperate with the through hole.

[0014] The present invention also provides a camera device, which includes the above-mentioned optical zoom lens.

[0015] In the technical solution of the present invention, when it is necessary to drive the zoom lens group to move along the first direction, the induction coil is energized. Since the induction coil is at least partially located in the magnetic field, and the projection of the induction coil in the second direction is at least located on the two magnets of one of the magnet groups, when the induction coil is energized to generate electromagnetic interaction with the magnet structure, part of the wire on one side of the induction coil in the first direction is in the magnetic field formed by the two magnets corresponding to the two magnet groups, and part of the wire on the other side in the first direction is in the magnetic field formed by the other two magnets corresponding to the two magnet groups. At this time, the magnetic force directions of the two magnetic fields are oppositely arranged. Since the winding center of the induction coil is extended along the second direction, the current directions in the wires on both sides of the induction coil in the first direction are oppositely arranged. At this time, the wires on both sides of the induction coil in the first direction respectively generate electromagnetic interaction with the magnetic field formed by the corresponding magnets to magnetically drive the wires on both sides of the induction coil in the first direction, and the directions of the magnetic force on the wires on both sides are set in the same direction to realize the movement of the induction coil in the first direction by the magnet structure, thereby making the zoom lens group move synchronously along the first direction. With such a configuration, the direction of the current in the induction coil is determined according to the relative position of the induction coil and the multiple magnets in the two magnet groups, thereby ensuring that the two magnet groups can always provide a positive driving force to the induction coil to drive the induction coil to move in the first direction, and while ensuring the driving force of the electromagnetic driving structure on the zoom lens group, the volume of a single magnet can be reduced, thereby reducing the required cost. 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 an optical zoom lens provided by the present invention; Figure 2 for Figure 1 A schematic cross-sectional view of a medium optical zoom lens; Figure 3 for Figure 1 Schematic diagram of the structure of the lens barrel of the medium optical zoom lens.

[0018] Description of Figure Numbers: 100. Optical zoom lens; 1. Lens barrel; 2. Electromagnetic drive structure; 21. Magnet structure; 211. Yoke; 2111. Yoke segment; 212. Magnet group; 2121. Magnet; 22. Induction coil; 3. Position determination structure; 31. Magnetic grid; 32. Magnetic sensor; 4. Guide structure; 41. Mounting seat; 42. Guide rod; 5. Zoom lens group.

[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] The present invention provides an optical zoom lens, which aims to solve the problem that the existing optical zoom lens' driving structure will lead to excessively high costs of magnets and yokes in scenarios requiring high driving force.

[0024] See also Figure 1In one embodiment of the present invention, the optical zoom lens 100 includes a lens barrel 1, a zoom lens group 5 and an electromagnetic driving structure 2, wherein the lens barrel 1 is extended along a first direction, the zoom lens group 5 is movably installed in the lens barrel 1 along the first direction, the electromagnetic driving structure 2 includes a magnet structure 21 and at least one induction coil 22 respectively arranged at one of the lens barrel 1 and the zoom lens group 5, the magnet structure 21 includes a yoke 211 and two magnet groups 212 arranged at intervals in a second direction, the yoke 211 is arranged in an annular shape and includes two yoke sections 2111 arranged at intervals in the second direction, the two magnet groups 212 are arranged in the two yoke sections 2111, and each magnet group 212 includes magnets arranged in sequence along the first direction. A plurality of magnets 2121, wherein the magnetic poles of two adjacent magnets 2121 in each magnet group 212 are arranged in opposite directions, and the magnetic poles of two corresponding magnets 2121 in the second direction in the two magnet groups 212 are arranged to attract each other, and the two magnet groups 212 form a magnetic field, and the winding center of the induction coil 22 extends along the second direction, and the induction coil 22 is at least partially located in the magnetic field, and the projection of the induction coil 22 in the second direction is at least located on the two magnets 2121 of one of the magnet groups 212. When the induction coil 22 is energized to generate electromagnetic action with the magnetic structure 21, the induction coil 22 can move relative to the magnetic structure 21 along the first direction to drive the zoom lens group 5 to move.

[0025] In the technical solution of the present invention, when it is necessary to drive the zoom lens group 5 to move along the first direction, the induction coil 22 is energized. Since the induction coil 22 is at least partially in the magnetic field, and the projection of the induction coil 22 in the second direction is at least located on the two magnets 2121 of one of the magnet groups 212, when the induction coil 22 is energized to generate electromagnetic action with the magnetic structure 21, part of the wire on one side of the induction coil 22 in the first direction is in the magnetic field formed by the two magnets 2121 corresponding to the two magnet groups 212, and part of the wire on the other side in the first direction is in the magnetic field formed by the other two magnets 2121 corresponding to the two magnet groups 212. 1, at this time, the magnetic directions of the two magnetic fields are oppositely arranged, and because the winding center of the induction coil 22 is extended along the second direction, the current directions in the wires on both sides of the induction coil 22 in the first direction are oppositely arranged. At this time, the wires on both sides of the induction coil 22 in the first direction respectively generate electromagnetic effects with the magnetic fields formed by the corresponding magnets 2121, so as to magnetically drive the wires on both sides of the induction coil 22 in the first direction, and the directions of the magnetic forces on the wires on both sides are arranged in the same direction, so as to realize the movement of the induction coil 22 in the first direction by the magnet structure 21, thereby making the zoom lens group 5 move synchronously along the first direction. With such arrangement, the direction of the current in the induction coil 22 is determined according to the relative position of the induction coil 22 and the multiple magnets 2121 in the two magnet groups 212, thereby ensuring that the two magnet groups 212 can always provide a positive driving force to the induction coil 22 to drive the induction coil 22 to move in the first direction, and while ensuring the driving force of the electromagnetic driving structure 2 on the zoom lens group 5, the volume of the single magnet 2121 can be reduced, thereby reducing the required cost.

[0026] It can be understood that since the yoke 211 includes two yoke sections 2111 spaced apart in the second direction, the two yoke sections 2111 can jointly confine the magnetic lines of force of the two magnet groups 212 therebetween, thereby ensuring that the two magnet groups 212 can form a closed magnetic circuit to provide a low magnetic resistance path, allowing the magnetic lines of force to flow more efficiently, thereby increasing the strength and stability of the magnetic field.

[0027] It should be further explained that, when the wires on both sides of the induction coil 22 in the first direction move into the magnetic field formed by the two adjacent magnets 2121, the magnetic force direction of the magnetic field changes. At this time, the direction of the electromagnetic driving force on the induction coil 22 will also change accordingly, and the induction coil 22 will move in the opposite direction. In this way, in order to maintain the specific movement direction of the induction coil 22 so that the induction coil 22 can stably move along the first direction and in a specific direction, in a further embodiment of the present invention, the direction of the current in the induction coil 22 is alternately changed during the movement of the induction coil 22 along the first direction. Specifically, when the wires on both sides of the induction coil 22 in the first direction move into the magnetic field formed by the two adjacent magnets 2121, the direction of the current in the induction coil 22 needs to be switched, so as to ensure that the driving force direction of the wires on both sides of the induction coil 22 by the magnetic structure 21 remains unchanged, so as to ensure that the induction coil 22 can move along a long stroke in the first direction.

[0028] Specifically, the change in the direction of the current in the induction coil 22 is determined according to the movable distance of the induction coil 22 in the first direction and the size of each of the magnets 2121 in the first direction. Specifically, in actual setting, it can be selected according to needs, and the present invention does not limit this.

[0029] Furthermore, in order to ensure the stability of the magnetic lines of force of the plurality of magnets 2121 in each of the magnet groups 212 , in one embodiment of the present invention, in each of the magnet groups 212 , two adjacent magnets 2121 are disposed with a gap.

[0030] In addition, the present invention does not limit the specific number of the induction coils 22. In one embodiment of the present invention, there is only one induction coil 22, and the projection of the induction coil 22 in the second direction is located on at least two magnets 2121 of one of the magnet groups 212. In this way, it is ensured that when there is only one induction coil 22, the electromagnetic driving structure 2 can drive the zoom lens group 5 to move along the first direction.

[0031] In another embodiment of the present invention, two induction coils 22 are provided, and the two induction coils 22 are spaced apart along the first direction. In this way, the directions of the currents in the two induction coils 22 are respectively set by the directions of the magnetic forces of the magnetic fields in which the two induction coils 22 are respectively located, so that the magnetic structure 21 can generate a positive electromagnetic driving force on the two induction coils 22, thereby enabling the electromagnetic driving structure 2 to further improve its own driving force without increasing the volume of the magnet 2121 and the yoke 211, so as to further improve the stability of the electromagnetic driving structure 2 in driving the zoom lens group 5 to move along the first direction.

[0032] In other embodiments of the present invention, three or more induction coils 22 may be provided, and the number thereof may be selected according to actual needs.

[0033] Specifically, in this embodiment, two induction coils 22 are provided.

[0034] It needs to be further explained that, when there are multiple induction coils 22, if the conductive wire of at least one side of one of the induction coils 22 in the first direction moves between the two magnets 2121 of the same magnet group 212, if the induction coil 22 continues to move, it will cause the conductive wire on at least one side of the first direction to be subjected to a reverse driving force, thereby causing the forward driving force and the reverse driving force to cancel each other out, and the induction coil 22 will be at an active dead point, causing the induction coil 22 to be unable to continue to move. At this time, the other induction coil 22 is still subjected to the forward driving force, therefore, the other induction coil 22 will continue to drive the two induction coils 22 to continue to move along the first direction, thereby causing the induction coil 22 to pass the active dead point, thereby ensuring the normal driving of the zoom lens group 5 by the electromagnetic driving structure 2, so as to ensure the stability of the movement of the zoom lens group 5 in the first direction.

[0035] Of course, it can be understood that when there are multiple induction coils 22, the direction of the current in two adjacent induction coils 22 depends on the distance between the two induction coils 22. For example, in one embodiment of the present invention, the distance between the two adjacent induction coils 22 is A, and the size of each magnet 2121 in the first direction is B, (a-1)B<A<aB, where a is an odd number. At this time, for the two adjacent induction coils 22, the wires on one side of the two induction coils 22 facing the other induction coil 22 in the first direction are in the same direction of the magnetic field. Therefore, in order to ensure that the two induction coils 22 are both subjected to positive driving force, the current directions of the two adjacent induction coils 22 are set in opposite directions.

[0036] In another embodiment of the present invention, the distance between two adjacent induction coils 22 is A, the size of each magnet 2121 in the first direction is B, aB<A<(a+1)B, where a is an odd number. At this time, corresponding to the two adjacent induction coils 22, the wires of one side of the two induction coils 22 facing the other induction coil 22 in the first direction are in the reverse magnetic field, therefore, to ensure that the two induction coils 22 are both subjected to the positive driving force, the current directions of the two adjacent induction coils 22 are set in the same direction.

[0037] In addition, in an embodiment of the present invention, the optical zoom lens 100 further includes a position determination structure 3, the position determination structure 3 includes a magnetic grid 31 and a magnetic sensor 32, the magnetic grid 31 is extended along a first direction, the magnetic sensor 32 is movably arranged relative to the magnetic grid 31 along the first direction, and the magnetic sensor 32 is used to detect the magnetic force change of the magnetic grid 31 during its movement to determine the position of the zoom lens group 5. In this way, the position of the magnetic sensor 32 relative to the magnetic grid 31 can indirectly reflect the position of the zoom lens group 5, and the actual position of the zoom lens group 5 can be accurately detected through the relative movement between the magnetic sensor 32 and the magnetic grid 31.

[0038] At the same time, through the cooperation of the magnetic driving structure and the position determination structure 3, a position detection accuracy of less than 1 um can also be achieved.

[0039] It should be noted that in the present invention, the magnetic grid 31 includes a plurality of magnetic signal bars arranged at intervals in the first direction, the spacing between any two adjacent magnetic signal bars is equal, and the polarities are arranged in an alternating manner, and the magnetic sensor 32 includes two types: a dynamic magnetic sensor (speed response magnetic sensor) and a static magnetic sensor (flux response magnetic sensor). The dynamic magnetic sensor has an output winding, and can only output a signal when the magnetic sensor 32 and the magnetic grid 31 produce relative motion. The static magnetic sensor has two windings, an excitation winding and an output winding, and can also output a signal when it is relatively stationary with the magnetic grid 31. The static magnetic sensor is a multi-gap iron core with unequal effective cross-sections stacked with iron-nickel alloy sheets. The excitation winding acts as a magnetic switch. When an alternating current is applied to it, the magnetic circuit of the iron core with a smaller cross-section is excited twice a week to produce magnetic saturation, so that the magnetic lines of force generated by the magnetic grid 31 cannot pass through the iron core. Only when the excitation current passes through zero twice a week, the iron core is not saturated, and the magnetic lines of force of the magnetic grid 31 can pass through the iron core. At this time, the output winding has an induced potential output. Its frequency is twice the frequency of the exciting current, and the amplitude of the output voltage is proportional to the magnetic flux entering the core, that is, it is related to the position of the magnetic sensor 32 relative to the magnetic grid 31. The magnetic sensor 32 is made into multiple gaps to increase the output, and its output signal is the average value of the signals obtained from multiple gaps, so the output accuracy can be improved.

[0040] Of course, the present invention does not limit the specific activities of the magnetic grid 31 and the magnetic sensor 32. In one embodiment of the present invention, the magnetic grid 31 is fixed, and the magnetic sensor 32 moves along the first direction relative to the magnetic grid 31; in another embodiment of the present invention, the magnetic sensor 32 is fixed, and the magnetic grid 31 moves along the first direction relative to the magnetic sensor 32.

[0041] In addition, in order to further improve the angle accuracy of the zoom lens group 5 during the movement along the first direction, in an embodiment of the present invention, the optical zoom lens 100 further includes a guide structure 4, which is movably connected to the zoom lens group 5 to guide the movement of the zoom lens group 5 along the first direction. The setting of the guide structure 4 can further limit the specific movement angle of the zoom lens group 5 in the first direction, so as to avoid position deviation of the zoom lens group 5 during the movement along the first direction, thereby affecting the imaging effect of the optical zoom lens 100.

[0042] It should be noted that the present invention does not limit the specific structural form of the guide structure 4. In one embodiment of the present invention, the zoom lens group 5 is provided with a through hole along the first direction, and the guide structure 4 includes a mounting seat 41 and a guide rod 42. The mounting seat 41 is fixedly arranged, and the guide rod 42 is extended along the first direction and arranged on the mounting seat 41, and the guide rod 42 passes through the through hole to slide with the through hole. In this way, when the zoom lens group 5 moves along the first direction, the guide rod 42 can limit the specific moving direction of the zoom lens group 5 to avoid position deviation of the zoom lens group 5 during the moving process.

[0043] In another embodiment of the present invention, the guide structure 4 can also be configured as a linear guide rail extending along the first direction, the linear guide rail is fixedly arranged, and a slider is arranged on the zoom lens group 5 corresponding to the linear guide rail, and the slider is slidably connected to the linear guide rail along the first direction. In this way, the cooperation between the linear guide rail and the slider can also limit the specific movement direction of the zoom lens group 5, so that the zoom lens group 5 can accurately move along the first direction to avoid position deviation.

[0044] Similarly, the present invention does not limit the number of the guide structures 4. In one embodiment of the present invention, the guide structure 4 may be provided with one; and in another embodiment of the present invention, the guide structure 4 may be provided with multiple, and the multiple guide structures 4 are spaced apart on the circumference of the zoom lens group 5, and the multiple guide structures 4 may also jointly locate the movable angle of the zoom lens group 5 to further accurately determine the movable direction of the zoom lens group 5.

[0045] The present invention further proposes a camera device, which includes an optical zoom lens 100. The specific structure of the optical zoom lens 100 refers to the above-mentioned embodiment. Since the camera 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.

[0046] 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. An optical zoom lens, characterized in that: include: The lens barrel is extended along the first direction; A zoom lens group, movably mounted in the lens barrel along a first direction; as well as, The electromagnetic driving structure comprises a magnetic structure and at least one induction coil respectively arranged on one of the lens barrel and the zoom lens group, wherein the magnetic structure comprises a yoke and two magnet groups spaced apart in a second direction, the yoke is arranged in an annular shape and comprises two yoke sections spaced apart in the second direction, the two magnet groups are arranged in the two yoke sections, each of the magnet groups comprises a plurality of magnets sequentially arranged along a first direction, the magnetic poles of two adjacent magnets in each magnet group are arranged in opposite directions, and the magnetic poles of two corresponding magnets in the second direction in the two magnet groups are arranged to attract each other, the two magnet groups form a magnetic field, the winding center of the induction coil is extended along the second direction, the induction coil is at least partially located in the magnetic field, and the projection of the induction coil in the second direction is at least located on the two magnets of one of the magnet groups, and when the induction coil is energized to generate electromagnetic action with the magnetic structure, the induction coil can move relative to the magnetic structure along the first direction to drive the zoom lens group to move.

2. The optical zoom lens according to claim 1, wherein: The direction of the current in the induction coil is alternately changed during the movement of the induction coil along the first direction.

3. The optical zoom lens according to claim 1, wherein: A plurality of the induction coils are provided, and the plurality of the induction coils are arranged at intervals along the first direction.

4. The optical zoom lens according to claim 3, wherein: The distance between two adjacent induction coils is A, the size of each magnet in the first direction is B, (a-1) B<A<aB; Wherein, a is an odd number, and the current directions of two adjacent induction coils are arranged in opposite directions.

5. The optical zoom lens according to claim 4, wherein: The distance between two adjacent induction coils is A, the size of each magnet in the first direction is B, and aB<A<(a+1)B; Wherein, a is an odd number, and the current directions of two adjacent induction coils are arranged in the same direction.

6. The optical zoom lens according to claim 1, wherein: In each magnet group, two adjacent magnets are arranged with a gap.

7. The optical zoom lens according to claim 1, wherein: The optical zoom lens also includes a position determination structure, which includes a magnetic grid and a magnetic sensor. The magnetic grid is extended along a first direction, and the magnetic sensor is movably arranged along the first direction relative to the magnetic grid. The magnetic sensor is used to detect the magnetic force change of the magnetic grid during its movement to determine the position of the zoom lens group.

8. The optical zoom lens according to claim 1, wherein: The optical zoom lens further comprises a guide structure, wherein the guide structure is movably connected to the zoom lens group to guide the movement of the zoom lens group along a first direction.

9. The optical zoom lens according to claim 8, wherein: The zoom lens group is provided with a through hole along a first direction; The guiding structure comprises: A mounting seat is fixedly mounted in the lens barrel; and A guide rod is extended along a first direction and is arranged on the mounting seat, and the guide rod is arranged through the through hole to slideably cooperate with the through hole.

10. A camera device, characterized in that Comprising the optical zoom lens as claimed in any one of claims 1 to 9.

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