WO2017113547A1

WO2017113547A1 - Mid-motor

Info

Publication number: WO2017113547A1
Application number: PCT/CN2016/079389
Authority: WO
Inventors: 王建华
Original assignee: 上海比路电子有限公司
Priority date: 2015-12-29
Filing date: 2016-04-15
Publication date: 2017-07-06
Also published as: CN105511046A

Abstract

Disclosed is a mid-motor, comprising a base (1), an iron housing (7), a lens carrier (3) and a coil (4). The iron housing (7) is of a square housing structure. A lens hole matching an outer side face of the lens carrier (3) is provided in the middle of the square housing structure. Magnets (5) are disposed on inner sides of four corners of the square housing structure. An upper spring (6) is disposed between the lens carrier (3) and the iron housing (7). A lower spring (2) is disposed between the lens carrier (3) and the base (1). Bosses (8) are disposed at four corners of the base (1). Positioning columns (9) are disposed on the bosses (8). The lower spring (2) comprises two semi-annular spring wires (11). A corner sheet (10) is connected to one end of each of the semi-annular spring wires (11), and a corner sheet (10) is also disposed in the middle of each of the semi-annular spring wires (11). A positioning hole (12) is provided in each of the corner sheets (10), the lower spring (2) is installed on the positioning columns (9) of the bosses (8) of the base through the positioning holes (12) in the corner sheets (10), and the inner side of the lower spring (2) is connected to the lens carrier (3). The mid-motor has the advantages that a carrier is fixed via the upper and lower springs, and is suspended therebetween, the lens carrier can be controlled to move up and down by a current entering a control coil, and focusing time is shortened.

Description

Center motor

Technical field

[0001] The present invention relates to a lens driving device, and more particularly to a center motor that is applied to a camera, a video camera, or a mobile phone having a camera function to drive the lens to move to adjust the focal length.

Background technique

[0002] With the diversification of functions of digital products, digital devices equipped with cameras or cameras, such as mobile phones and multimedia players, have been rapidly developed and widely used. The above camera or camera usually uses a lens with adjustable focal length or auto focus, and the adjustment process is to change the position of the lens. For driving the lens, the drive motor is usually used. The optical zoom driver changes the focal length of the lens group by adjusting the lens position to achieve zooming.

[0003] A conventional camera that adjusts a focal length generally includes a stepping motor, a gear, a cam, and a connecting rod. The invention of the application No. CN201210402795.X discloses a mechanical device for a high-pixel mobile phone lens. The utility model comprises a fixed cylinder for supporting positioning, a cam cylinder and first, second and third group frames, and a casing and a motor group. The motor group comprises a focusing motor and a zoom motor, all of which belong to a miniature high-precision stepping motor. The transmission is smooth, the positioning is accurate, and the repeatability is high. The first and second group frames are disposed in the fixed cylinder, the cam cylinder is sleeved on the fixed cylinder, and the first and second group frames are composed of a cam cylinder and a fixed cylinder. Limiting and guiding, one end of the third group frame is disposed in the fixed cylinder, and the other end is extended and fixed to the focusing motor and is driven to move up and down by the focusing motor, and the zoom motor drives the cam barrel Rotation, the rotation of the cam barrel drives the first and second group frames to move relative to each other.

[0004] The first and second guide shaft groups are respectively disposed on the lower edge of the first and second group frames, and the first and second zoom curve groove groups are fixed on the inner surface of the cam barrel. a first and a second linear groove group is disposed on the cylinder wall of the cylinder, and the first guide shaft group of the first group frame 3 passes through the first linear groove group on the fixed cylinder and enters the corresponding first on the cam cylinder In the zoom curve groove group, the second guide shaft group of the second group frame passes through the second linear groove group on the fixed cylinder into the corresponding second zoom curve groove on the cam barrel, the first and second guide shafts The group can only move up and down in the first and second linear groove groups. When the cam barrel rotates left and right, the first and second guide shaft groups are in the first and second zoom curve groove groups along with the zoom curve groove. Track movement, and in the first, second Under the action of the linear groove group, the first and second group frames are moved relative to each other to realize the optical zoom function; the third group frame is provided with a positioning hole and a threaded hole, and the positioning hole is positioned by the axis in the fixed cylinder The threaded hole is matched with the screw on the focusing motor. When the focusing motor rotates, the positioning hole of the third group frame is positioned on the fixed cylinder 1 by the screw, so the third group frame can only Move up and down to achieve auto focus.

[0005] The outer lower end of the cam barrel is provided with a ring gear, and the zoom motor further has a gear set that functions as a transmission shifting mechanism, so that the motor gear provided on the shaft of the zoom motor passes through the middle transmission gear, The gear ring on the cam cylinder is driven by the driving gear to rotate the cam cylinder and thereby drive the first and second groups of frames to move up and down. The gear set has a high transmission ratio and a transmission ratio of up to 24, low noise...noise Below 40Db, high efficiency...efficiency up to %%. The first and second zoom line groove assemblies of the cam barrel respectively include three uniformly distributed zoom curve grooves, and the first and second guide shaft groups of the first and second group frames respectively include three uniformly distributed guides. The shaft and each guide shaft enter the corresponding zoom curve groove to form a smooth track positioning system with precise positioning. In the system multi-section optical zoom, the optical zoom precision of the system is ensured.

technical problem

Problem solution

Technical solution

[0006] It is an object of the present invention to provide a center motor that operates more stably and focuses more quickly.

[0007] In order to achieve the above object, the technical solution of the present invention is: a center motor, comprising a base, an iron shell disposed in cooperation with the base, a lens carrier disposed in the iron shell, and a coil disposed around the lens carrier, the feature The iron shell is a square shell structure, and a lens hole is formed in the middle of the square shell structure to cooperate with an outer side surface of the lens carrier, and a magnet is disposed on the inner side of the four corners of the square shell structure, the lens carrier and the iron shell An upper spring is disposed between the lens carrier and the base, a boss is disposed at four corners of the base, a positioning post is disposed on the boss, and the lower spring includes two semicircular annular spring wires, each of which One end of the semicircular annular spring wire is connected to one corner piece, and the other end is disposed adjacent to the corner piece of one end of the other semicircular ring spring wire, and the two semicircular ring spring wires are oppositely arranged to form a circular ring structure, and two semicircular ring springs There is a gap between the wires, and a corner piece is also arranged in the middle of the semicircular annular spring wire. A positioning hole is arranged on each corner piece, and the lower spring is mounted on the base boss through the positioning hole on the corner piece. Positioning post, inner side of the lower spring and lens carrier Connected.

[0008] According to a preferred embodiment of the present invention, the iron shell includes a top surface, four side surfaces connected to the top surface, a lens hole is disposed on the top surface, and a bottom end of the four sides of the iron shell a gap is formed between the two ends of the iron shell, and the bottom end of the iron shell is formed with a recess, and the outer side of the four corners of the base is provided with a flange, and the bottom end of the four sides of the iron shell is recessed. On the flange on the outside of the four corners of the base.

[0009] According to a preferred embodiment of the present invention, a spring clip is disposed in the iron shell, and the outer side of the upper spring has a square structure, and the four corners of the upper spring are fixed on the spring clip in the iron shell, the upper spring The inner side is provided with a circular hole, and the lower bottom surface of the upper spring is in contact with the lens carrier.

[0010] The lens hole of the iron shell extends upward to form an obliquely outwardly expanding flange.

[0011]

Advantageous effects of the invention

Beneficial effect

[0012] The principle of the optical zoom motor is that the principle of the Faraday left-hand rule is that the energized coil generates a magnetic field and generates a force between the magnetic field of the magnet to complete the pushing of the lens carrier. The invention has the advantages that the carrier is fixed by the upper and lower springs and suspended in the middle, and the current flowing into the control coil can control the movement of the lens carrier up and down, reducing the focus 吋.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of an embodiment of the present invention.

2 is a blasting diagram of FIG. 1.

[0015] FIG. 3 is a schematic view showing the connection of the lower spring and the base.

BEST MODE FOR CARRYING OUT THE INVENTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0017] The figure includes: a base 1, a lower spring 2, a lens carrier 3, a coil 4, a magnet 5, an upper spring 6, an iron shell 7, a boss 8, a positioning post 9, a corner piece 10, a semicircular ring spring wire 11, Positioning hole 12, flange 13.

[0018] As shown in FIG. 1 and FIG. 2, a center motor includes a base 1, an iron shell 2 disposed with the base 1, and iron. A lens carrier 3 is disposed in the casing 2, and a coil 4 is disposed around the lens carrier 3. The iron casing 2 is a square casing structure, and a lens matching the outer surface of the lens carrier 3 is disposed in the middle of the square casing structure. a hole, a magnet 3 is disposed on the inner side of the four corners of the square housing structure, an upper spring 6 is disposed between the lens carrier 3 and the iron shell 7, and a lower spring 2 is disposed between the lens carrier 3 and the base 1, the base 1 A triangular boss 8 is disposed on the four corners, and a positioning post 9 is disposed on the boss 8. The outer boss of the positioning post 9 is upwardly convex to form a step, and the lower spring 2 includes two semicircular annular spring wires 11, each semicircle One end of the annular spring wire 11 is connected to the corner piece 10, and the other end is disposed adjacent to the corner piece 10 at one end of the other semicircular annular spring wire 11. The two semicircular annular spring wires 11 are oppositely arranged to form a circular ring structure, and two A gap is left between the semicircular annular spring wires, and a corner piece 10 is also disposed in the middle of the semicircular annular spring wire. Each of the corner pieces 10 is provided with a positioning hole 12, and the lower spring 2 is mounted on the base boss through the positioning hole 12 on the corner piece. 8 on the positioning post 9, on the inner side of the lower spring On a lens carrier.

[0019] According to a preferred embodiment of the present invention, the iron shell 2 includes a top surface, four side surfaces connected to the top surface, a lens hole is disposed on the top surface, and bottoms of the four sides of the iron shell 2 a mouth is formed between the ends, and the bottom end of the two adjacent sides of the iron shell is formed with a depression upwardly, and the outer side of the four corners of the base is provided with a flange 13, and the bottoms of the four sides of the iron shell The end recesses rest on the flanges 13 on the outside of the four corners of the base.

[0020] According to a preferred embodiment of the present invention, a spring clip is disposed in the iron shell 2, the outer side of the upper spring has a square structure, and the four corners of the upper spring 6 are fixed on the spring clip in the iron shell. A circular hole is provided inside the upper spring 6, and a lower bottom surface of the upper spring 6 is in contact with the lens carrier 3.

[0021] the iron shell extends outward from the lens hole to form an outwardly flared flange that expands upward and outward, and has stronger anti-interference

[0022] The above is a further detailed description of the present invention in conjunction with the specific preferred embodiments, and it is not intended that the specific embodiments of the invention are limited to the above description. It will be apparent to those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the invention.

Claims

Claim

[Claim 1] A center motor includes a base, an iron shell disposed in cooperation with the base, a lens carrier disposed in the iron shell, and a coil disposed around the lens carrier, wherein the iron shell is a square shell structure. a lens hole is formed in the middle of the square housing structure, and a magnet hole is disposed on the outer side of the lens carrier. The magnet is disposed on the inner side of the four corners of the square housing structure, and a spring, a lens carrier and a base are disposed between the lens carrier and the iron shell. A lower spring is disposed between the four corners of the base, a boss is disposed on the boss, and the positioning post is disposed on the boss, the lower spring includes two semicircular annular spring wires, and one end of each semicircular annular spring wire is connected to the corner piece The other end is disposed adjacent to the corner piece at one end of the other semicircular annular spring wire, and the two semicircular annular spring wires are oppositely arranged to form a circular ring structure, and a gap is left between the two semicircular annular spring wires, the semicircle A corner piece is also arranged in the middle of the annular spring wire, and a positioning hole is arranged on each corner piece, and the lower spring is mounted on the positioning post of the base boss through the positioning hole on the corner piece, and the inner side of the lower spring is transparent. The mirror carrier is connected.

[Claim 2] The center motor according to claim 1, wherein: the iron shell includes a top surface, four side surfaces connected to the top surface, and a lens hole is disposed on the top surface, the iron a bottom opening is formed between the bottom ends of the four sides of the shell, and the bottom end of the two adjacent sides of the iron shell is formed with a recess upwardly, and the outer side of the four corners of the base is provided with a flange, the iron shell The bottom end depressions of the four sides rest on the flanges on the outside of the four corners of the base.

[Claim 3] The center motor according to claim 2, wherein: the spring case is provided with a spring clip, the outer side of the upper spring has a square structure, and the four corners of the upper spring are fixed to the iron shell On the inner spring clip, a circular hole is provided on the inner side of the upper spring, and the lower bottom surface of the upper spring is in contact with the lens carrier.

[Claim 4] The center motor according to claim 3, wherein the iron shell extends outward from the lens hole to form an outwardly flared flange that expands outwardly.