CN213937717U - Anti-torsion assembly and voice coil motor with same - Google Patents

Abstract

The embodiment of the utility model provides an antitorque subassembly and have its voice coil motor relates to voice coil motor technical field. Wherein, antitorque subassembly is installed in voice coil motor, includes: the magnetic part comprises a sensing surface and a stop surface, and the stop surface is connected with the sensing surface; the carrier yoke comprises a plane corresponding to the sensing surface and a limit surface connected with the plane, and the limit surface corresponds to the stop surface; wherein a movable gap is arranged between the magnetic part and the carrier yoke, and the magnetic part is embedded in a stop groove formed by connecting the plane and the limiting surface. The embodiment of the utility model provides a can effectively improve the turned angle of carrier yoke under the external force impact to and carrier yoke that carrier yoke and magnetic part produced the collision and cause falls the bits.

Description

Anti-torsion assembly and voice coil motor with same

Technical Field

The utility model relates to a voice coil motor technical field particularly, relates to an antitorque subassembly and have its voice coil motor.

Background

With the continuous development of scientific technology, the frequency of updating 3C (computer, communication, consumer) electronic products is gradually increasing. Among them, photographing and video shooting are indispensable functions of electronic devices such as mobile phones, tablet computers, and notebook computers, and the level of clarity, stability, and the like is also gradually increasing.

In the related art, a Voice Coil Motor (VCM) is used as a power device for displacement such as a lens in an auto-focus camera. Among them, the voice coil motor is a kind of motor, and is called as a voice coil motor because the principle is similar to that of a speaker. The voice coil motor has the characteristics of high frequency response and high precision. The voice coil motor is mainly used in a permanent magnetic field, the lens is driven to move by changing the direct current of a carrier coil in the motor, and the position of the lens is adjusted to change the focal length of the lens, so that the image pickup is in the clearest state.

When the voice coil motor is impacted by the outside, the carrier rotates and collides with the magnetic part to generate composite material powder, so that the performance of the voice coil motor is influenced.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to solve the above problems in the prior art, and to provide an anti-torsion assembly and a voice coil motor having the same.

The utility model discloses a first aspect of the embodiment provides an antitorque subassembly, and this antitorque subassembly includes: the magnetic part comprises a sensing surface and a stop surface, and the stop surface is connected with the sensing surface; the carrier yoke comprises a plane corresponding to the sensing surface and a limit surface connected with the plane, and the limit surface corresponds to the stop surface; wherein a movable gap is arranged between the magnetic part and the carrier yoke, and the magnetic part is embedded in a stop groove formed by connecting the plane and the limiting surface.

In the above aspect, preferably, a first included angle portion is formed at a joint of the sensing surface and the stop surface, and a second included angle portion is formed at a joint of the plane and the limiting surface.

In any of the above aspects, preferably, the angle of the first angled portion corresponds to the angle of the second angled portion.

In any of the above aspects, preferably, the first included angle portion and the second included angle portion are arranged in a chamfered or rounded manner.

In any of the above embodiments, it is preferable that a plurality of stopper grooves are provided at intervals on the outer circumferential side of the carrier yoke.

In any of the above embodiments, the carrier yoke is preferably a rectangular frame, and the four ends of the carrier yoke are provided with the stopper grooves, respectively.

In any of the above schemes, preferably, the sensing surface is disposed parallel to the plane, and a movable gap is disposed between the sensing surface and the plane.

In any of the above schemes, preferably, the stop surface and the limit surface are arranged in parallel, and a movable gap is arranged between the stop surface and the limit surface.

The utility model provides a second aspect of embodiment provides a voice coil motor, and this voice coil motor includes the motor support, installs on the motor support as above-mentioned first aspect and the antitorque subassembly of each embodiment, and wherein, the carrier is fixed inside the carrier yoke and is used for bearing the camera lens, and the magnetic part is fixed on the motor support, and the upper and lower both ends of carrier yoke are connected shell fragment respectively and are connected shell fragment activity down and fix on the motor support.

Based on the aforesaid the embodiment of the utility model provides an antitorque subassembly and have its voice coil motor sets up the backstop groove that is used for backstop magnetic part at carrier yoke periphery, and magnetic part cooperation backstop groove sets up the backstop face for when voice coil motor receives external force impact carrier yoke and rotates and collide with the magnetic part, the carrier yoke passes through the mode of face-to-face contact with the magnetic part, can reduce the turned angle of carrier yoke and reduce because the carrier yoke that the collision caused falls bits risk.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a schematic perspective view of an embodiment of a torsion resistant assembly of the present invention;

FIG. 2 is a schematic perspective view of another embodiment of the torsion assembly of the present invention;

FIG. 3 is a front view of another embodiment of the torque assembly of the present invention;

FIG. 4 is a schematic structural diagram of the area A shown in FIG. 3 according to the present invention;

FIG. 5 is a schematic view of the carrier yoke of FIG. 4 rotated by a predetermined angle in the direction of the arrow according to the present invention;

fig. 6 is a schematic perspective view of a magnetic member of the anti-torsion assembly of the present invention;

FIG. 7 is a schematic view of a carrier yoke of the torque resisting assembly of the present invention;

fig. 8 is a schematic structural diagram of an embodiment of a voice coil motor according to the present invention;

fig. 9 is an exploded schematic view of the voice coil motor according to the embodiment of the present invention shown in fig. 8.

Reference numerals: 1-a magnetic member; 11-a sensing surface; 12-a stop surface; 100-a first pinch portion; 2-carrier yoke; 21-plane; 22-a limiting surface; 23-a containment hole; 200-a second included angle portion; 3-stopping groove; 41-a base; 42-a cover body; 5-mounting an elastic sheet; 6-lower spring plate.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In order to improve the convenience of focusing of a camera and reduce the space occupied by the camera in electronic equipment, more and more electronic equipment adopts a voice coil motor to drive a lens for focusing. The voice coil motor is fixed with the permanent magnet outside the carrier and is used for cooperating with the circular telegram coil, produces electromagnetic force drive camera lens and moves in the direction of perpendicular to camera lens in order to reach the effect of focusing. When the voice coil motor is impacted by external force, for example, a mobile phone falls down to collide with the ground, the carrier yoke bearing the lens can rotate greatly to collide with the permanent magnet. Because the carrier yoke is mostly made of plastic parts, the rigidity of the carrier yoke is less than that of the permanent magnet, the structure of the carrier yoke is easily damaged during collision, the phenomenon of chip falling is generated, the damage of the structure of the carrier yoke causes difficulty in focusing of a lens, and the chip falling of the carrier yoke affects the joint of the lens and the carrier yoke and interferes with light rays of the lens.

The embodiment of the utility model provides a for solve the technical problem who exists among the above-mentioned correlation technique, provide an antitorque subassembly to improve and receiving external force at voice coil motor and assaulting down, carrier yoke rotation range is big and fall the influence of bits to the camera lens.

The utility model provides an in the first aspect, provide an antitorque subassembly, this antitorque subassembly can include magnetic part 1, carrier yoke 2, reforms transform the structure of magnetic part 1 and carrier yoke 2 among the voice coil motor, constitutes the utility model discloses the antitorque subassembly of embodiment. Fig. 1 is a schematic perspective view of an embodiment of a torsion resistant assembly of the present invention; FIG. 2 is a schematic perspective view of another embodiment of the torsion assembly of the present invention; FIG. 3 is a front view of another embodiment of the torque assembly of the present invention; FIG. 4 is a schematic structural diagram of the area A shown in FIG. 3 according to the present invention; FIG. 5 is a schematic view of the carrier yoke of FIG. 4 rotated by a predetermined angle in the direction of the arrow according to the present invention; fig. 6 is a schematic perspective view of a magnetic member of the anti-torsion assembly of the present invention; fig. 7 is a schematic view of a carrier yoke of the anti-torque assembly of the present invention. As shown in fig. 1-7, in the present embodiment, the magnetic member 1 may include a sensing surface 11 and a stopping surface 12, where the stopping surface 12 is connected to the sensing surface 11; the carrier yoke 2 may include a plane 21 corresponding to the sensing surface 11 and a stopper surface 22 connecting the plane 21, the stopper surface 22 corresponding to the stopper surface 12; wherein, a movable gap D is arranged between the magnetic part 1 and the carrier yoke 2, and the magnetic part 1 is embedded in a stop groove 3 formed by connecting the plane 21 and the limiting surface 22.

In the present embodiment, a housing hole 23 is provided in the middle of the carrier yoke 2, and the housing hole 23 is used to house a carrier lens. A plurality of stopper grooves 3 may be provided at equal intervals on the outer side of the carrier yoke 2. In one embodiment, the carrier yoke 2 may have a rectangular frame shape, and the above-mentioned stopper grooves 3 may be provided at the corners of the rectangular frame, that is, the four ends of the carrier yoke 2 may be provided with the stopper grooves 3, respectively, and the carrier yoke 2 may further preferably have a square shape in order to keep the electromagnetic force uniformly applied to the carrier yoke 2. In another embodiment, the carrier yoke 2 may have a regular polygonal frame shape, and the stopper groove 3 may be provided at any adjacent two-side connection portion.

The inner side of the stop groove 3 formed on the carrier yoke 2 may include three surfaces connected in sequence, wherein two ends of the plane 21 along the first direction may be respectively connected to two limit surfaces 22, the two limit surfaces 22 extend in different directions based on the orientation of the plane 21, an included angle with the plane 21 may be the same angle θ, and a connection between the limit surfaces 22 and the plane 21 is in smooth transition, so that structural damage of the carrier yoke 2 caused by a phenomenon that a corner portion contacts with the plane in a contact process of the magnetic member 1 and the carrier yoke 2 may be avoided. In this embodiment, the limiting surface 22 may be a curved surface with a set radian or an inclined surface, and the specific shape may be matched according to the configuration of the magnetic member 1 placed in the limiting groove 3, which is not specifically limited herein.

The magnetic member 1 of the present embodiment may be provided with a sensing surface 11 corresponding to the plane 21, and the sensing surface 11 may be parallel to the plane 21, so that distances between positions of the sensing surface 11 and the plane 21 are equal, a corresponding moving space may be reserved in the process of adjusting the lens by the carrier yoke 2, and it is avoided that the carrier yoke 2 contacts with the sensing surface 11 to limit the movement of the carrier yoke 2. In cooperation with the stopper surface 22, stopper surfaces 12 may be provided at both ends of the sensing surface 11 in the first direction. The included angle between the stop surface 12 and the sensing surface 11 may be (360- θ), so that the stop surface 12 and the limiting surface 22 may contact and fit with each other in a surface-to-surface manner as shown in fig. 5 after the carrier yoke 2 is impacted by an external force and rotates in the direction of the arrow shown in fig. 4. The direction of the arrow shown in fig. 4 is an example, and the rotation direction of the carrier yoke 2 is not limited, and the carrier yoke 2 may rotate in the opposite direction as shown by the arrow.

The anti-torque assembly obtained by matching the magnetic element 1 with the carrier yoke 2 is arranged in the embodiment, through the matching of the stop surface 12 and the limiting surface 22, on one hand, the rotating angle of the carrier yoke 2 after being impacted by external force can be limited, on the other hand, the contact mode of the stop surface 12 and the limiting surface 22 is arranged to be a surface-surface contact mode, the pressure intensity received when the carrier yoke 2 collides with the magnetic element 1 is reduced, the structural damage to the carrier yoke 2 caused by the fact that the magnetic element is collided after the carrier yoke 2 rotates can be effectively reduced, and further, the influence of chip falling of the carrier yoke 2 on lens light is avoided.

In some embodiments, as shown in fig. 4, the sensing surface 11 may be disposed parallel to the plane 21, and a movable gap D is disposed between the sensing surface 11 and the plane. The stop surface 12 may be disposed parallel to the limiting surface 22, and a moving gap D is disposed between the stop surface 12 and the limiting surface 22.

The junction of the sensing surface 11 and the stop surface 12 forms a first included angle portion 100, and the junction of the plane 21 and the limiting surface 22 forms a second included angle portion 200. The first included angle portion 100 may be a part of the structure of the magnetic element 1, including a part of the stop surface 12, a part of the sensing surface 11, and a part of the structure of the magnetic element 1 between the part of the stop surface 12 and the part of the sensing surface 11. The second chamfered portion 200 may include a portion of the planar surface 21, a portion of the retaining surface 22, and a portion of the carrier yoke 2 structure that supports the portion of the planar surface 21 and the portion of the retaining surface 22.

In a specific use process, the angle of the first included angle part 100 and the angle of the second included angle part 200 may be in a corresponding relationship, that is, the sum of the angle of the first included angle part 100 and the angle of the second included angle part 200 is 360 degrees. The angle of the second chamfered portion 200 may also be slightly larger than the angle of the first chamfered portion 100 within a preset range. If the angle of the second included angle portion 200 is smaller than the angle of the first included angle portion 100, a gap is left at the second included angle portion 200 during the collision of the carrier yoke 2 with the magnetic member 1, and the linearity of the collision fracture of the carrier yoke 2 may occur, which may pose a certain threat to the structural integrity of the carrier yoke 2.

In this embodiment, the first fillet portion 100 and the second fillet portion 200 are chamfered or rounded. Wherein, the chamfering is to connect the sensing surface 11 with the stop surface 12 in a smooth transition way and connect the plane 21 with the limit surface 22 in a smooth transition way; the fillet is formed by arranging the transition connection part into an arc shape. The magnetic member 1 may connect the sensing surface 11 and the stopping surface 12 through the first clamping portion 100, and the inside of the stopping groove 3 in the carrier yoke 2 may connect the flat surface 21 and the stopper surface 22 through the second clamping portion 200. Because the sensing surface 11 is in smooth transition connection with the stop surface 12, and the plane 21 is in smooth transition connection with the limiting surface 22, when the carrier yoke 2 is impacted by external force to rotate, the first included angle portion 100 and the second included angle portion 200 can avoid the generation of the phenomenon of angle-surface contact, and reduce the damage to the structure of the carrier yoke 2.

The convex carrier yoke 2 on the carrier yoke 2 is provided with a stop piece which is matched with a through hole or a blind groove arranged on the motor support to limit the circumferential rotation of the carrier yoke. The stop member may be one of a cylinder, a semi-cylinder, and a prism. The carrier yoke 2 may be an integrally molded rubber ring which may be provided with the above-mentioned accommodation hole 23 for accommodating the carrier lens. The carrier yoke 2 made of rubber material can deform during collision, so that scraps are not easy to fall off, and the structural integrity of the carrier yoke 2 can be further guaranteed.

In some embodiments, a groove (not shown in the drawings, but not affecting the understanding of the technical solution by those skilled in the art) may be further formed around the outer periphery of the carrier yoke 2. A coil which can generate electromagnetic action with the magnetic element 1 can be wound in the groove. After the coil is electrified, electromagnetic acting force is generated to drive the carrier yoke 2 to move along the axial direction, and then the lens is focused. The groove can pass through the plane 21, and the coil does not exceed the critical plane of the plane 21, so that inaccurate focusing caused by collision of the coil and the magnetic part 1 in the axial movement process of the carrier yoke 2 can be effectively avoided.

Based on the same or similar design, the utility model provides a second aspect provides a voice coil motor. Fig. 8 is a schematic structural diagram of an embodiment of a voice coil motor according to the present invention; fig. 9 is an exploded schematic view of the voice coil motor according to the embodiment of the present invention shown in fig. 8. As shown in fig. 8 and 9, the voice coil motor includes a motor frame, on which the anti-torsion assemblies according to the first aspect and the various embodiments are mounted, wherein the carrier is fixed inside the carrier yoke 2 and is used for carrying the lens, the magnetic member 1 is fixed on the motor frame, and the upper end and the lower end of the carrier yoke 2 are respectively connected with the upper elastic sheet 5 and the lower elastic sheet 6, which are movably fixed on the motor frame.

In this embodiment, the motor support may include a base 41 and a cover 42 detachably connected by a buckle, one end of the upper spring 5 may be detachably connected to one side of the carrier yoke 2 close to the cover 42, and the other end of the upper spring 5 may be detachably connected to the inner side of the cover 42. One end of the lower elastic sheet 6 is detachably connected to one side of the carrier yoke 2 close to the base 41, and the other end of the lower elastic sheet 6 is detachably connected to one side of the cover body base 41 close to the carrier yoke 2. The magnetic member 1 is mounted in a groove on the inside of the cover 42, the shape of the inside of the cover 42 matches the shape of the outer periphery of the carrier yoke 2 and a space for the carrier yoke 2 to move axially is reserved in the cover 42.

The carrier yoke 2 is movably connected to the motor support through an upper elastic sheet 5 and a lower elastic sheet 6, the carrier yoke 2 moves upwards or downwards along the axial direction according to the current direction in the coil after the coil is electrified, and the carrier yoke is restored to the initial position through the upper elastic sheet 5 and the lower elastic sheet 6 after the coil is powered off.

By arranging the torsion resistant assembly of the first aspect and the preferred embodiments, the voice coil motor of the present embodiment can prevent the carrier yoke 2 from being structurally damaged due to the fact that the carrier yoke 2 collides with the magnetic member 1 when the voice coil motor is subjected to external force impact, and prolong the service life of the voice coil motor.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (9)

1. The utility model provides an antitorque subassembly installs in voice coil motor, its characterized in that includes:

the magnetic part (1) comprises a sensing surface (11) and a stop surface (12), wherein the stop surface (12) is connected to the sensing surface (11);

a carrier yoke (2) comprising a plane (21) corresponding to the sensing surface (11) and a limit surface (22) connecting the plane (21), the limit surface (22) corresponding to the stop surface (12);

wherein a movable gap (D) is arranged between the magnetic part (1) and the carrier yoke (2), and the magnetic part (1) is embedded in a stop groove (3) formed by connecting the plane (21) and the limit surface (22).

2. The torsion assembly according to claim 1, wherein a junction of the sensing surface (11) and the stop surface (12) forms a first pinch portion (100) and a junction of the flat surface (21) and the stop surface (22) forms a second pinch portion (200).

3. The torsion assembly according to claim 2, wherein an angle of the first included angle portion (100) corresponds to an angle of the second included angle portion (200).

4. The torsion assembly according to claim 2 or 3, wherein the first (100) and second (200) pinch corners are chamfered or rounded.

5. The torsion assembly according to claim 1, wherein a plurality of the stopper grooves (3) are provided at intervals on an outer circumferential side of the carrier yoke (2).

6. The torsion assembly according to claim 5, wherein the carrier yoke (2) has a rectangular frame shape, and four ends of the carrier yoke (2) are provided with the stopper grooves (3), respectively.

7. The torsion assembly according to claim 1, wherein the sensing surface (11) is arranged parallel to the plane (21) and the play (D) is arranged between the sensing surface (11) and the plane.

8. The torsion assembly according to claim 1, wherein the stop surface (12) is arranged parallel to the limit surface (22) and a play (D) is arranged between the stop surface (12) and the limit surface (22).

9. A voice coil motor comprising a motor support, characterized in that the anti-torsion assembly according to any one of claims 1 to 8 is installed on the motor support, wherein a carrier is fixed inside a carrier yoke (2) and used for carrying a lens, a magnetic member (1) is fixed on the motor support, and the upper and lower ends of the carrier yoke (2) are respectively connected with an upper spring (5) and a lower spring (6) which are movably fixed on the motor support.

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