CN219107275U

CN219107275U - Voice coil motor, zoom lens, and photographing apparatus

Info

Publication number: CN219107275U
Application number: CN202223053699.7U
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 discloses a voice coil motor, a zoom lens and photographic equipment, wherein the voice coil motor comprises a shell, a magnetic structure, a rotor structure and a driving structure, the magnetic structure is arranged on the shell, and the magnetic structure comprises an annular magnetic yoke body; the rotor structure comprises a plurality of rotor coils, and the rotor coils are movably sleeved on the magnetic yoke section of the annular magnetic yoke body; the driving structure comprises a plurality of driving chips, and the driving chips are respectively and electrically connected to the mover coils. The driving chips are used for respectively electrifying the mover coils, so that the power supply pressure of the driving chips is reduced, and the driving chips can obtain larger electromagnetic driving force on the whole to cope with larger load demands, so that the application range of the voice coil motor is widened, and meanwhile, the production cost is reduced.

Description

Voice coil motor, zoom lens, and photographing apparatus

Technical Field

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

Background

Voice coil motors are devices that convert electrical energy into mechanical energy and achieve linear and limited-swing-angle motion, and generally include a coil and a yoke body, where the magnetic poles of the magnetic field generated by the magnetic field from the yoke body interact with the magnetic poles of the energized coil to produce regular motion, and in the conventional voice coil motor structure, single-coil energized forces are generally employed, however, limited by the power capabilities of the chip, and the single-coil energized forces are limited and cannot cope with larger load demands.

Disclosure of Invention

The utility model mainly aims to provide a voice coil motor, a zoom lens and photographic equipment, and aims to solve the problem that the cost is greatly increased in the mode of driving a single coil to move by adopting a large-size chip in the existing voice coil motor.

In order to achieve the above object, a voice coil motor according to the present utility model includes:

a housing;

the magnetic structure is arranged on the shell and comprises an annular magnetic yoke body;

the rotor structure comprises a plurality of rotor coils, and the rotor coils are movably sleeved on the magnetic yoke section of the annular magnetic yoke body; the method comprises the steps of,

the driving structure comprises a plurality of driving chips, and the driving chips are respectively and electrically connected to the rotor coils.

Optionally, a plurality of the mover coils are arranged in parallel, and the mover structure further includes a moving carrier, and the moving carrier is connected with the plurality of the mover coils.

Optionally, the mobile carrier comprises a carrier plate, the carrier plate comprises a plate body, the plate body is provided with a mounting surface, and a mounting convex part extends out of the middle of the mounting surface;

the plurality of mover coils include two first mover coils which are sandwiched on two opposite end surfaces of the mounting boss.

Optionally, the peripheral sides of the two first mover coils are abutted against the mounting surface of the plate body.

Optionally, the two first mover coils are mounted with the plate body and/or the mounting protrusion by adhesion.

Optionally, the mover structure further includes a plurality of moving carriers, and the moving carriers are respectively and correspondingly connected with the mover coils.

Optionally, the annular yoke body includes:

the curved magnetic yoke main body comprises two straight magnetic yoke sections and an arc magnetic yoke section, wherein the two straight magnetic yoke sections are oppositely arranged at intervals along the width direction of the curved magnetic yoke main body, and the arc magnetic yoke section is connected with one end part of the two straight magnetic yoke sections, which is opposite to each other; the method comprises the steps of,

and the magnetic yoke cover body is detachably connected with the other opposite ends of the two straight magnetic yoke sections.

Optionally, the yoke cover is formed with a mating groove, and the straight yoke section is formed with a positioning protrusion opposite to the mating groove, and when the yoke cover is connected to two straight yoke sections, the positioning protrusion can correspondingly extend into the mating groove.

In order to achieve the above object, the zoom lens according to the present utility model includes the above voice coil motor;

the voice coil motor includes:

a housing;

the magnetic structure is arranged on the shell and comprises an annular magnetic yoke body; the method comprises the steps of,

the rotor structure comprises a plurality of rotor coils, and the rotor coils are movably sleeved on the yoke section of the annular yoke body.

In order to achieve the above object, the present utility model proposes a photographing apparatus including the above zoom lens.

In the technical scheme provided by the utility model, the traditional single-coil structure is replaced by a plurality of active cell coils, and the active cell coils are respectively electrified by the driving chips, so that the power supply pressure of the single active cell coil is reduced, the larger electromagnetic driving force can be obtained on the whole, the larger load requirement is met, the application range of the voice coil motor is widened, and meanwhile, the total cost of the driving chips with smaller specifications is smaller than that of the driving chips with larger specifications on the premise of the same integral driving, so that the production cost 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 a schematic perspective view of a voice coil motor (excluding a casing) according to an embodiment of the present utility model;

FIG. 2 is a schematic side view of the voice coil motor of FIG. 1;

FIG. 3 is a schematic diagram of the front view of the voice coil motor of FIG. 1;

fig. 4 is a schematic perspective view of the mover structure (including the first mover coil) of fig. 1;

fig. 5 is a schematic diagram of the front view of the mover structure in fig. 4.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Voice coil motor	12	Magnet body
1	Magnetic structure	2	Active cell structure
				11	Annular magnetic yoke body	21	Mover coil
111	Curve magnetic yoke main body	211	A first mover coil
				1111	Straight yoke section	22	Mobile carrier
1112	Arc-shaped magnetic yoke section	221	Carrier plate
				1113	Positioning convex part	222	Board body
112	Magnet yoke cover	222a	Mounting surface
				1121	Matching groove	223	Mounting boss

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 voice coil motor, a zoom lens and a photographing apparatus, which are aimed at solving the problem of a large increase in cost of the conventional voice coil motor in a mode of driving a single coil to move by using a large-sized chip, wherein fig. 1 to 5 are schematic structural diagrams of an embodiment of the voice coil motor provided by the present utility model.

Referring to fig. 1 to 5, the voice coil motor 100 includes a casing, a magnetic structure 1, a mover structure 2, and a driving structure, the magnetic structure 1 is disposed on the casing, and the magnetic structure 1 includes an annular yoke 11; the rotor structure 2 comprises a plurality of rotor coils 21, and the rotor coils 21 are movably sleeved on the yoke section of the annular yoke body 11; the driving structure comprises a plurality of driving chips, and the driving chips are respectively and electrically connected to the plurality of mover coils 21.

In the technical scheme provided by the utility model, the plurality of the mover coils 21 are adopted to replace the traditional single-coil structure, and the plurality of the mover coils 21 are respectively electrified through the plurality of the driving chips, so that the power supply pressure of the single driving chip is reduced, the larger electromagnetic driving force can be obtained on the whole, the larger load requirement is met, the application range of the voice coil motor 100 is widened, and meanwhile, the total cost of the plurality of the driving chips with smaller specifications is smaller than that of the driving chip with larger specification on the premise of the same overall driving capacity, so that the production cost can be reduced.

Further, in this embodiment, a plurality of the mover coils 21 are disposed in parallel, and the mover structure 2 further includes a moving carrier 22, where the moving carrier 22 is connected to the plurality of the mover coils 21. The moving carrier 22 may be used as a carrier of various moving devices, and in particular, the moving carrier 22 may be a moving frame on the zoom lens, where the moving frame is provided with a zoom lens, and the moving frame may be movable along the extending direction of the yoke section to implement zooming. In this embodiment, the moving carrier 22 is connected to the plurality of mover coils 21, and the plurality of mover coils 21 are energized and then move under the action of the magnetic fields of the plurality of magnets 12, so as to drive the moving carrier 22 to move, thereby realizing zooming of the zoom lens.

In another embodiment, the plurality of mover coils 21 are closely wound around each other, and the mover structure 2 further includes a moving carrier 22, where the moving carrier 22 is connected to the plurality of mover coils 21. By densely winding a plurality of the mover coils 21 in the same area, any power failure of the mover coils 21 will not change the stress points of the moving carrier 22, thereby ensuring the driving stability of the moving carrier 22 and avoiding the occurrence of shaking.

In various connection forms between the moving carrier 22 and the plurality of mover coils 21, specifically, referring to fig. 3 to 5, in this embodiment, the moving carrier 22 includes a carrier plate 221, the carrier plate 221 includes a plate body 222, the plate body 222 has a mounting surface 222a, and a mounting protrusion 223 extends from a middle portion of the mounting surface 222 a; the plurality of mover coils 21 includes two first mover coils 211, and the two first mover coils 211 are sandwiched between two opposite end surfaces of the mounting boss 223. The mounting base of the two first mover coils 211 can be provided by one mounting protrusion 223, the mounting protrusion 223 is utilized to the greatest extent, the overall volume of the plate body 222 can be reduced, and the complexity of the plate body 222 can be reduced, so that the plate body 222 is convenient to process and manufacture.

Further, referring to fig. 2 and 5, in the present embodiment, the peripheral sides of the two first sub-coils 211 are abutted against the mounting surface 222a of the plate body 222. The first mover coil 211 is prevented from being displaced by the first mover coil 211 by the positioning restriction of the first mover coil 211 by the mounting surface 222a of the plate body 222.

In order to avoid that the first mover coils 211 are forced to separate from the carrier plate 221, in this embodiment, two first mover coils 211 are mounted to be adhered to the plate body 222, so as to ensure that the first mover coils 211 are firmly adhered to the plate body 222;

in another embodiment, the two first mover coils 211 are adhered to the mounting convex portions 223, so that the first mover coils 211 and the mounting convex portions 223 can be firmly adhered;

it should be noted that, the above two parallel technical features "two first mover coils 211 and the plate body 222 are adhered and mounted" and "two first mover coils 211 and the mounting protrusions 223 are adhered and mounted" may be alternatively or simultaneously set, and obviously, the effect of setting simultaneously is better, so that the connection between the first mover coils 211 and the carrier plate 221 is ensured to be stable.

In this embodiment, the mover structure 2 further includes a plurality of moving carriers 22, and the plurality of moving carriers 22 are respectively and correspondingly connected to the plurality of mover coils 21. In the technical solution of this embodiment, a plurality of moving carriers 22 are respectively and correspondingly connected to a plurality of mover coils 21, so that a plurality of moving carriers 22 can be driven to move simultaneously or respectively by a plurality of mover coils 21, thereby realizing diversification of driving modes.

Because the annular yoke body 11 needs to be arranged in a closed loop to provide a larger magnetic field, and the manner in which the mover coil 21 is sleeved on the yoke section is only two, one is to directly wind the mover coil 21 on the yoke section in the winding process, the other is to separately arrange the annular yoke body 11, and the annular yoke body 11 is sealed after the split opening of the mover coil 21 and thus the annular yoke body 11 is sleeved on the yoke section, in this embodiment, the annular yoke body 11 includes a curved yoke main body 111 and a yoke cover body 112, the curved yoke main body 111 includes two straight yoke sections 1111 and an arc yoke section 1112, the two straight yoke sections 1111 are relatively arranged at intervals along the width direction thereof, and the arc yoke section 1112 is connected with one end portion of the two straight yoke sections 1111 opposite to each other; the yoke cover 112 is detachably connected to the opposite ends of the two straight yoke sections 1111. In the technical solution of the present embodiment, before closing the annular yoke body 11, the wound rotor coil 21 may be first sleeved into the straight yoke sections 1111, and then the yoke cover 112 is connected to the two straight yoke sections 1111 to complete the closing of the annular yoke body 11, so that compared with the manner of directly winding on the yoke sections, the implementation process of the technical solution of the present embodiment is more convenient, and the production efficiency is greatly improved; it is understood that the yoke section includes two straight yoke sections 1111, and the extending direction of the straight yoke sections 1111 is the moving direction of the mover coil 21.

It can be appreciated that the plurality of mover coils 21 are sleeved on one of the straight yoke sections 1111; the magnetic structure 1 further includes a magnet 12, where the magnet 12 is disposed on the other straight yoke section 1111, specifically, the magnet 12 is disposed on opposite end surfaces of the two straight yoke sections 1111, so that excessive occupation of space caused by the magnet 12 being disposed outside the annular yoke body 11 can be avoided, and the overall volume of the voice coil motor 100 is reduced.

Further, in the present embodiment, referring to fig. 1 and 2, a mating groove 1121 is formed on the yoke cover 112, a positioning protrusion 1113 is formed on the yoke cover 112 opposite to the mating groove 1121, and when the yoke cover 112 is connected to the two straight yoke sections 1111, the positioning protrusion 1113 can correspondingly extend into the mating groove 1121. Under the action of the magnet 12, the curved yoke main body 111 has magnetism, the yoke cover 112 can magnetically attract the two straight yoke sections 1111 along the magnetic pole directions of the two straight yoke sections 1111, and the yoke cover 112 can be restricted from moving along the radial direction of the straight yoke sections 1111 through the adaptive connection of the positioning protrusion 1113 and the matching groove 1121, so as to ensure that the yoke cover 112 is firmly connected with the curved yoke main body 111.

The present utility model also provides a zoom lens including the voice coil motor 100 as described above. Because the zoom lens adopts all the technical solutions of all the embodiments of the voice coil motor 100, at least the technical solutions of the embodiments have all the beneficial effects, and are not described in detail herein.

The utility model also provides a photographic device comprising a zoom lens as described above. The photographic device adopts all the technical schemes of all the embodiments of the zoom lens, so that the photographic device has at least all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.

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 voice coil motor, comprising:

a housing;

2. The voice coil motor of claim 1, wherein a plurality of the mover coils are disposed in parallel, the mover structure further comprising a moving carrier connecting the plurality of mover coils.

3. The voice coil motor of claim 2, wherein the moving carrier comprises a carrier plate, the carrier plate comprising a plate body having a mounting face, a mounting boss extending from a middle of the mounting face;

4. A voice coil motor according to claim 3, wherein both of the peripheral side surfaces of the first mover coils abut against the mounting surface of the plate body.

5. A voice coil motor according to claim 3, wherein two of the first mover coils are mounted with the plate body and/or the mounting bosses by adhesion.

6. The voice coil motor of claim 1, wherein the mover structure further comprises a plurality of moving carriers, and the moving carriers are respectively and correspondingly connected to the mover coils.

7. The voice coil motor of claim 1, wherein the annular yoke body comprises:

8. The voice coil motor of claim 7, wherein the yoke cover is formed with a fitting groove, and the straight yoke section is formed with a positioning protrusion opposite to the fitting groove, the positioning protrusion being capable of correspondingly extending into the fitting groove when the yoke cover is connected to the two straight yoke sections.

9. A zoom lens comprising the voice coil motor according to any one of claims 1 to 8.

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