CN219107273U

CN219107273U - Magnetic structure of voice coil motor, zoom lens and photographic equipment

Info

Publication number: CN219107273U
Application number: CN202223037843.8U
Authority: CN
Inventors: 赵媚娇; 李昆; 李敏德; 王浩
Original assignee: Zhongshan United Optoelectronic Research Institute Co Ltd
Current assignee: Zhongshan United Optoelectronic Research Institute Co Ltd
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-05-30
Anticipated expiration: 2032-11-15

Abstract

The utility model provides a magnetic structure of a voice coil motor, the voice coil motor, a zoom lens and photographic equipment, wherein the magnetic structure of the voice coil motor is used on the zoom lens and comprises a magnetic yoke assembly and a magnetic stripe assembly; the magnetic yoke assembly comprises two annular magnetic yoke bodies which are arranged side by side in the first direction, wherein the central axis of each annular magnetic yoke body is arranged along the second direction, each annular magnetic yoke body is arranged in an extending way along the third direction, and the two annular magnetic yoke bodies are provided with two first magnetic yoke sections which are mutually attached and two second magnetic yoke sections which are mutually far away in the first direction; the magnetic stripe component comprises two magnets which are respectively positioned in the two annular magnetic yoke bodies, and the two magnets are respectively arranged on two opposite side end surfaces of the two first magnetic yoke sections or two opposite side end surfaces of the two second magnetic yoke sections; because the scheme adopts the two annular magnetic yoke bodies and the two magnets, a magnetic field with higher strength can be generated, so that a larger driving force is generated; meanwhile, the volumes of the magnet and the magnetic yoke are reduced, and the cost is reduced.

Description

Magnetic structure of voice coil motor, zoom lens and photographic equipment

Technical Field

The utility model relates to the technical field of photographic equipment, in particular to a magnetic structure of a voice coil motor, the voice coil motor, a zoom lens and photographic equipment.

Background

Most of the existing zoom lenses are driven by a VCM motor (VCM (Voice Coil Motor) refers to a voice coil motor in electronics and is one of motors), a rotor of the existing VCM motor is a coil wound on the outer side of a moving carrier, a stator is a yoke ring fixed in a lens barrel, the existing yoke ring is a circular ring sleeved outside the coil, the magnet ring is arranged on the inner side of the yoke ring, and when the zoom lens is used on photographic equipment with smaller volume, the magnetic field intensity of the used VCM motor is low and the driving force is small; meanwhile, on the premise of meeting the required driving force, a thickened and widened magnet and a magnet yoke are required to be used, so that the volume of the zoom lens is enlarged, and the production cost is increased.

Disclosure of Invention

The utility model mainly aims to provide a magnetic structure of a voice coil motor, the voice coil motor, a zoom lens and photographic equipment, and aims to solve the problems that the existing VCM motor is low in magnetic field intensity and driving force, and the VCM motor meeting the driving force requirement is large in size and high in cost.

In order to achieve the above object, the present utility model provides a magnetic structure of a voice coil motor for a zoom lens, the magnetic structure of the voice coil motor comprising:

the magnetic yoke assembly comprises two annular magnetic yoke bodies which are arranged side by side in a first direction, wherein the central axis of each annular magnetic yoke body is arranged along a second direction, each annular magnetic yoke body is arranged in an extending mode along a third direction, and the two annular magnetic yoke bodies are provided with two first magnetic yoke sections which are mutually attached and two second magnetic yoke sections which are mutually far away in the first direction; the method comprises the steps of,

the magnetic stripe assembly comprises two magnets, wherein the two magnets are respectively positioned in the two annular magnetic yoke bodies, and the two magnets are respectively arranged on two opposite side end surfaces of the first magnetic yoke section or two opposite side end surfaces of the second magnetic yoke section.

Optionally, the yoke assembly includes:

the two magnetic yokes comprise a first straight magnetic yoke section, a second straight magnetic yoke section and an arc-shaped magnetic yoke section, wherein the first straight magnetic yoke section and the second straight magnetic yoke section are oppositely arranged in the first direction, two ends of the first straight magnetic yoke section and the second straight magnetic yoke section in the third direction are connected through the arc-shaped magnetic yoke section, and the first straight magnetic yoke section of one magnetic yoke and the second straight magnetic yoke section of the other magnetic yoke are attached; the method comprises the steps of,

the magnetic yoke cover body extends along the first direction and is used for sequentially connecting the other two ends of the first straight magnetic yoke section and the second straight magnetic yoke section of each magnetic yoke in the third direction so as to respectively enclose to form the two annular magnetic yoke bodies;

the two magnets are respectively arranged on the first straight magnetic yoke section and the second straight magnetic yoke section which are mutually attached or respectively arranged on the first straight magnetic yoke section and the second straight magnetic yoke section which are mutually far away;

the two first magnetic yoke sections comprise first straight magnetic yoke sections and second straight magnetic yoke sections which are mutually attached, and the two second magnetic yoke sections correspondingly comprise first straight magnetic yoke sections and second straight magnetic yoke sections which are mutually far away.

Optionally, the two yokes include a first yoke and a second yoke, a first straight yoke section of the first yoke and a second straight yoke section of the second yoke are attached to each other, and an installation part is arranged at the other end of the first straight yoke section of the second yoke in the third direction;

the magnet yoke cover body is detachably mounted on the mounting portion and is used for sequentially connecting the first straight magnet yoke section and the second straight magnet yoke section of the first magnet yoke and the first straight magnet yoke section and the second straight magnet yoke section of the second magnet yoke.

Optionally, a clamping groove is formed in the other end of the first straight magnetic yoke section of the second magnetic yoke in the third direction;

one end of the magnetic yoke cover body is provided with a clamping convex part which is clamped in the clamping groove, and the other end of the magnetic yoke cover body extends transversely to extend to the other end of the second straight magnetic yoke section which is arranged on the first magnetic yoke in the third direction;

wherein, the installation department includes the joint groove.

Optionally, in the third direction, two positioning grooves are respectively formed at the other two ends of the first straight yoke section of the first yoke and the second straight yoke section of the second yoke;

the magnetic yoke cover body is provided with two positioning columns, the two positioning columns and the two positioning grooves are in one-to-one correspondence, so that when the magnetic yoke cover body is covered on the first magnetic yoke and the second magnetic yoke, the two positioning columns can be respectively and correspondingly inserted into the two positioning grooves.

Optionally, the device further comprises a detachable connection structure, wherein the detachable connection structure comprises a via hole, a thread locking hole and a locking screw rod, and the thread end of the locking screw rod is arranged in the via hole in a penetrating way and is installed in the thread locking hole in a threaded way;

the through hole is formed in the magnet yoke cover body, and the thread locking hole is correspondingly formed in the other end, in the third direction, of the second straight magnet yoke section of the first magnet yoke.

Optionally, each magnet includes a magnetic stripe, and the magnetic stripe extends along the third direction and is fixedly connected with the two first magnetic yoke segments or the two second magnetic yoke segments through a threaded connection structure.

The utility model also provides a voice coil motor for a zoom lens, the voice coil motor comprising:

a magnetic structure of the voice coil motor; the method comprises the steps of,

the annular coil is used for being arranged on the movable bearing plate of the zoom lens and wound along the extension axis of the third direction;

the voice coil motor comprises a voice coil motor body, a first magnet yoke section, a second magnet yoke section, a first magnet yoke section and a second magnet yoke section, wherein the first magnet yoke section and the second magnet yoke section are mutually attached to each other in the first direction on the magnetic structure of the voice coil motor body, and the two first magnet yoke sections penetrate through the annular coil.

The utility model also provides a zoom lens, which comprises a voice coil motor.

The present utility model also provides a photographing apparatus including a zoom lens.

In the technical scheme of the utility model, the magnetic structure of the voice coil motor comprises a magnetic yoke assembly and a magnetic stripe assembly; the magnetic yoke assembly comprises two annular magnetic yoke bodies arranged side by side, wherein the two annular magnetic yoke bodies are provided with two first magnetic yoke sections which are mutually attached and two second magnetic yoke sections which are mutually far away in the first direction; two magnets are respectively arranged on two opposite side end surfaces of the two first magnetic yoke sections or two opposite side end surfaces of the two second magnetic yoke sections; that is, when the coil is electrified, a permanent magnetic field is generated, electric energy is converted into mechanical energy by changing the direct current of the coil in the motor, and the movable bearing plate arranged on the coil is driven to move; meanwhile, the two annular magnetic yoke bodies and the two magnets are adopted, so that a magnetic field with higher strength can be generated, and a larger driving force is generated, and therefore, under the condition of providing the same driving force, the magnetic body of the scheme is small in volume requirement and the magnetic yoke is small in volume requirement, so that the volume of the magnetic structure of the voice coil motor can be reduced, the occupied space of the magnetic structure of the voice coil motor is reduced, and the volumes of the voice coil motor and the zoom lens are reduced; moreover, since the magnets and yokes are used in a small volume, the production costs of the voice coil motor and the zoom lens can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an assembly schematic diagram of a first embodiment of a voice coil motor according to the present utility model;

fig. 2 is a schematic perspective view of a first embodiment of the voice coil motor (mounted on a movable carrier) in fig. 1;

fig. 3 is an assembly schematic diagram of a second embodiment of a voice coil motor according to the present utility model;

fig. 4 is a schematic perspective view of a second embodiment of the voice coil motor (mounted on a movable carrier) in fig. 3.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Voice coil motor	113	Arc-shaped magnetic yoke section
1	Magnetic structure of voice coil motor	114	Magnet yoke cover
				11	Magnetic yoke assembly	12	Magnetic stripe assembly
111	A first magnetic yoke	121	Magnet body
				1111	First straight yoke section of first yoke	2	Annular coil
1112	Second straight yoke section of first yoke	200	Movable bearing plate
				112	A second magnetic yoke	F1	First direction
1121	First straight yoke section of second yoke	F2	Second direction
				1122	A second straight yoke section of the second yoke	F3	Third direction of

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the case where a directional instruction is involved in the embodiment of the present utility model, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In view of the above, the present utility model provides a magnetic structure of a voice coil motor, a zoom lens, and a photographing apparatus. Fig. 1 to fig. 4 are specific embodiments of a voice coil motor according to the present utility model.

Referring to fig. 1 to 4, the magnetic structure 1 of the voice coil motor is used on a zoom lens, and the magnetic structure 1 of the voice coil motor includes a yoke assembly 11 and a magnetic stripe assembly 12; the yoke assembly 11 comprises two annular yoke bodies arranged side by side in a first direction F1, wherein the central axis of each annular yoke body is arranged along a second direction F2, each annular yoke body is arranged in a extending way along a third direction F3, and the two annular yoke bodies are provided with two first yoke 111 sections which are mutually attached and two second yoke 112 sections which are mutually far away in the first direction F1; the magnetic stripe assembly 12 includes two magnets 121, where the two magnets 121 are respectively located in the two annular magnetic yokes, and the two magnets 121 are respectively located on two opposite side end surfaces of the two first magnetic yokes 111 or two opposite side end surfaces of the two second magnetic yokes 112.

In the technical scheme of the utility model, the magnetic structure 1 of the voice coil motor comprises a magnetic yoke assembly 11 and a magnetic stripe assembly 12; the yoke assembly 11 comprises two annular yoke bodies arranged side by side, wherein the two annular yoke bodies are provided with two first yoke 111 sections which are mutually attached and two second yoke 112 sections which are mutually far away in the first direction F1; two magnets 121 are respectively arranged on two opposite side end surfaces of the two first magnetic yoke 111 sections or two opposite side end surfaces of the two second magnetic yoke 112 sections; that is, when the coil is electrified, a permanent magnetic field is generated, the electric energy is converted into mechanical energy by changing the direct current of the coil in the motor, and the movable bearing plate 200 installed on the coil is driven to move, so that the movable bearing plate 200 is used for installing the zoom lens, and the zoom lens can be driven to move, thereby realizing driving operation; meanwhile, because the two annular magnetic yoke bodies and the two magnets 121 are adopted in the scheme, a magnetic field with higher strength can be generated, so that a larger driving force is generated, and the magnetic yoke 121 in the scheme has small volume requirement and small magnetic yoke volume requirement under the condition of providing the same driving force, so that the volume of the magnetic structure 1 of the voice coil motor can be reduced, the occupied space of the magnetic structure 1 of the voice coil motor is reduced, and the volumes of the voice coil motor 100 and the zoom lens are reduced; also, since the magnets 121 and yokes are used in a small size, the production costs of the voice coil motor 100 and the zoom lens can be reduced.

It should be noted that, the annular magnetic yoke body may be formed by assembling a plurality of magnetic yoke segments, but the number of the magnetic yoke segments of each annular magnetic yoke body is not limited in the present utility model.

Specifically, referring to fig. 1 and 3, the yoke assembly 11 includes two yokes and a yoke cover 114; each of the two yokes includes a first straight yoke section, a second straight yoke section, and an arc-shaped yoke section 113, where the first straight yoke section and the second straight yoke section are disposed opposite to each other in the first direction F1, and two ends of the first straight yoke section and the second straight yoke section of one of the yokes are connected by the arc-shaped yoke section 113 in the third direction F3, and the first straight yoke section and the second straight yoke section of the other yoke are attached to each other; the yoke cover 114 extends along the first direction F1, and is configured to sequentially connect the other two ends of the first straight yoke segment and the second straight yoke segment of each of the yokes in the third direction F3, so as to form the two annular yoke bodies by enclosing respectively; wherein, the two magnets 121 are respectively arranged on the first straight magnetic yoke section and the second straight magnetic yoke section which are mutually attached or respectively arranged on the first straight magnetic yoke section and the second straight magnetic yoke section which are mutually far away; the two first magnetic yoke 111 sections comprise a first straight magnetic yoke section and a second straight magnetic yoke section which are mutually attached, and the two second magnetic yoke 112 sections correspondingly comprise a first straight magnetic yoke section and a second straight magnetic yoke section which are mutually far away; in this embodiment, the yoke assembly 11 includes two yokes, and the two yokes and the yoke cover 114 enclose together to form two annular yoke bodies, so that the annular yoke bodies are convenient to be assembled and disassembled; meanwhile, the first straight yoke section and the second straight yoke section extending along the third direction F3 provide a moving space for a coil to meet the zoom requirement of the zoom lens.

Meanwhile, in the present embodiment, the two yokes include a first yoke 111 and a second yoke 112, a first straight yoke section 1111 of the first yoke and a second straight yoke section 1122 of the second yoke are attached to each other, and an installation portion is provided at the other end of the first straight yoke section 1121 of the second yoke in the third direction F3; the yoke cover 114 is detachably mounted on the mounting portion, so as to be capable of sequentially connecting the first straight yoke section 1111 and the second straight yoke section 1112 of the first yoke and the first straight yoke section 1121 and the second straight yoke section 1122 of the second yoke; by providing the mounting portion, the mounting of the yoke cover 114 is facilitated and stabilized.

Specifically, the other end of the first straight yoke section 1121 of the second yoke in the third direction F3 is provided with a clamping groove; one end of the yoke cover 114 is provided with a clamping convex part, the clamping convex part is clamped in the clamping groove, and the other end of the yoke cover 114 extends transversely to extend to the other end of the second straight yoke section 1112, which is arranged on the first yoke, in the third direction F3; wherein the mounting part comprises the clamping groove; so set up, the joint groove not only can the joint be fixed the yoke lid 114, so that the installation of yoke lid 114 is more stable, simultaneously, the joint groove also can be as location structure, so that the installation of yoke lid 114 is more smooth and easy, can once install in place, thereby improves packaging efficiency.

More specifically, in the third direction F3, two positioning grooves are respectively provided at the other two ends of the first straight yoke section 1111 of the first yoke and the second straight yoke section 1122 of the second yoke; the magnetic yoke cover 114 is provided with two positioning columns, and the two positioning columns correspond to the two positioning grooves one by one, so that when the magnetic yoke cover 114 is covered on the first magnetic yoke 111 and the second magnetic yoke 112, the two positioning columns can be respectively inserted into the two positioning grooves correspondingly; by providing the positioning groove and the positioning post, not only the assembly of the yoke cover 114 can be smoother; and can further limit the yoke cover 114, so that the yoke cover 114 is more firmly installed.

The specific manner of fixing the yoke cover 114 is not limited in the present utility model, and in some embodiments, the yoke cover 114 may be adhered to the first straight yoke section 1111 and the second straight yoke section of the first yoke and the first straight yoke section 1121 and the second straight yoke section of the second yoke by optical adhesive.

In another embodiment, in order to further improve the installation stability of the yoke cover 114 and ensure that the yoke cover 114 is easy to be disassembled and assembled, the magnetic structure 1 of the voice coil motor further comprises a detachable connection structure, wherein the detachable connection structure comprises a via hole, a threaded locking hole and a locking screw, and the threaded end of the locking screw is penetrated through the via hole and is installed in the threaded locking hole in a threaded manner; wherein the through hole is formed in the yoke cover 114, and the threaded locking hole is correspondingly formed in the other end of the second straight yoke section 1112 of the first yoke in the third direction F3; in this way, not only the mounting stability of the yoke cover 114 can be improved; further, the yoke cover 114 is fastened by screw fastening, so that the yoke cover 114 can be easily assembled and disassembled.

It should be noted that the specific form of the magnet 121 is not limited in the present utility model, and the magnet 121 may be a whole magnetic stripe or may be spliced by a plurality of magnetic blocks.

Specifically, in the present embodiment, each of the magnets 121 includes a magnetic stripe extending along the third direction F3 and fixedly connected to the two first yoke 111 segments or the two second yoke 112 segments by a screw connection structure; the structure is simple, and the assembly efficiency is high; and the disassembly and assembly of the magnetic stripe are more convenient.

The present utility model also provides a voice coil motor 100, including the magnetic structure 1 of the voice coil motor, where the voice coil motor 100 includes all technical features of the magnetic structure 1 of the voice coil motor, so that the voice coil motor also has technical effects brought by all the technical features, and will not be described in detail herein.

The voice coil motor 100 further includes a ring coil 2, where the ring coil 2 is used for being disposed on a movable carrier 200 of the zoom lens, and the ring coil 2 is wound along an extension axis of the third direction F3; wherein, two first magnetic yokes 111 attached to each other in the first direction F1 on the magnetic structure 1 of the voice coil motor penetrate into the annular coil 2; that is, when the toroidal coil 2 is energized, a permanent magnetic field is generated, and the electric energy is converted into mechanical energy by changing the direct current of the coil in the motor, so that the movable carrier plate 200 mounted on the toroidal coil 2 is driven to move, and the zoom lens can be driven to move because the movable carrier plate 200 is used for mounting the zoom lens, thereby realizing driving operation.

The present utility model also provides a zoom lens, including the voice coil motor 100, where the zoom lens includes all technical features of the voice coil motor 100, so that the zoom lens also has technical effects brought by all the technical features, which are not described in detail herein.

The zoom lens further comprises a lens shell body and a movable bearing plate 200, wherein a containing cavity is formed in the lens shell body, an opening is formed in the side wall of the axial direction of the opening in a penetrating mode, the movable bearing plate 200 is movably installed in the containing cavity along the axial direction of the opening, the movable bearing plate 200 is used for installing a zoom lens, the annular coil 2 is arranged on the movable bearing plate 200 and is wound along the axial direction of the opening, and the magnetic structure 1 of the voice coil motor is fixed on the inner side wall of the containing cavity and at least partially penetrates into the annular coil 2.

When the annular coil 2 is electrified, a permanent magnetic field is generated, electric energy is converted into mechanical energy by changing the direct current of the inner coil of the motor, and the movable bearing plate 200 for mounting the annular coil 2 is driven to move, so that the movable bearing plate 200 is movably mounted in the accommodating cavity along the axial direction of the opening hole because the movable bearing plate 200 is used for mounting the zoom lens, the zoom lens is driven to move, the focusing speed is high, the focusing precision is high, the power consumption is lower, the noise is low, meanwhile, the magnetic structure is fixed in the accommodating cavity of the lens shell, the voice coil motor 100 component belongs to a built-in structure after the camera equipment is assembled, and the voice coil motor 100 component cannot be seen from the outside, so that the problem that the voice coil motor 100 for driving the zoom lens to move in the prior art is externally mounted, and the camera equipment has large volume is solved.

In order to make the activity of movable carrier plate 200 steady, movable carrier plate 200 with be provided with the second guide structure between the camera lens casing, the second guide structure include along the trompil axial extension set up the guide bar and with the guiding hole of guide bar looks adaptation, the guide bar is located hold the intracavity, the guiding hole is located movable carrier plate 200, so set up, through the guide bar with the guiding hole cooperation makes movable carrier plate 200 can be followed the trompil axial steady motion.

The magnet yoke assembly 11 is detachably connected with the inner wall surface of the accommodating cavity, and the magnet yoke assembly 11 is convenient to replace.

The implementation the yoke subassembly 11 with hold the mode of detachable connection between the intracavity wall face and have a plurality of, for example, the yoke subassembly 11 with hold between the intracavity wall face and fix through the buckle clamping, specifically, in the embodiment of this application, hold the intracavity wall face and pass through and be equipped with first screw hole, first screw hole interpolation is equipped with the spiro union piece, the lateral surface of the second straight yoke section 1122 of second yoke and/or the lateral wall face of arc yoke section 113 corresponds first screw hole is passed through and is equipped with the second screw hole, the second screw hole with the screw thread end threaded connection of spiro union piece, so set up, the realization the yoke subassembly 11 with hold and detachable connection between the intracavity wall face.

For accurate installation magnet yoke subassembly 11, magnet yoke subassembly 11 with still be provided with location structure between the camera lens casing, location structure include location portion and with the cooperation portion of location portion looks adaptation, location portion with between the cooperation portion, one of them locate magnet yoke subassembly 11, the other is located the camera lens casing, so set up, through location portion with cooperation portion cooperatees, make magnet yoke subassembly 11 can accurate install in the camera lens casing holds the intracavity.

Specifically, in the embodiment of the present application, the locating part is located the lens housing, the locating part sets up to the locating lever, the cooperation portion is located yoke subassembly 11, the cooperation portion sets up to the locating hole, through with the locating lever cartridge with in the locating hole, realized the accurate installation of yoke subassembly 11.

The utility model also provides a photographic device comprising the zoom lens, and the photographic device comprises all technical characteristics of the zoom lens, so that the photographic device also has technical effects brought by all the technical characteristics, and the technical effects are not repeated herein.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. A magnetic structure of a voice coil motor for use on a zoom lens, the magnetic structure of the voice coil motor comprising:

2. The magnetic structure of the voice coil motor of claim 1, wherein the yoke assembly comprises:

3. The magnetic structure of the voice coil motor according to claim 2, wherein the two yokes include a first yoke and a second yoke, a first straight yoke section of the first yoke and a second straight yoke section of the second yoke are provided in a fitting manner, and the first straight yoke section of the second yoke is provided with a mounting portion at the other end in the third direction;

4. A magnetic structure of a voice coil motor according to claim 3, wherein the other end of the first straight yoke section of the second yoke in the third direction is provided with a clamping groove;

wherein, the installation department includes the joint groove.

5. The magnetic structure of the voice coil motor according to claim 4, wherein in the third direction, two positioning grooves are provided at the other two ends of the first straight yoke section of the first yoke and the second straight yoke section of the second yoke, respectively;

6. The magnetic structure of claim 4, further comprising a detachable connection structure, wherein the detachable connection structure comprises a via hole, a threaded locking hole and a locking screw, and a threaded end of the locking screw is arranged in the via hole in a penetrating manner and is installed in the threaded locking hole in a threaded manner;

7. The magnetic structure of claim 1, wherein each of the magnets includes a magnetic strip extending in the third direction and fixedly connected to the two first yoke segments or the two second yoke segments by a screw connection structure.

8. A voice coil motor for use on a zoom lens, the voice coil motor comprising:

a magnetic structure of a voice coil motor as claimed in any one of claims 1 to 7; the method comprises the steps of,

9. A zoom lens comprising the voice coil motor according to claim 8.

10. A photographing apparatus comprising the zoom lens according to claim 9.