WO2015192786A1

WO2015192786A1 - Focusing motor capable of realizing optical zooming and optical anti-vibration simultaneously

Info

Publication number: WO2015192786A1
Application number: PCT/CN2015/081788
Authority: WO
Inventors: 钞晨
Original assignee: 深圳市世尊科技有限公司
Priority date: 2014-06-19
Filing date: 2015-06-18
Publication date: 2015-12-23
Also published as: CN104020546B; CN104020546A

Abstract

A focusing motor capable of realizing optical zooming and optical anti-vibration simultaneously. The end portion of a magnet yoke (5) of an automatic focusing motor is provided with a multiple optical zooming device. The multiple optical zooming device comprises a translation coil assembly (7) mounted on the end surface of the magnet yoke (5), a support (8) movably connected to the translation coil assembly (7), a magnet set fixed on the support (8) and a lens group. The translation coil assembly (7) interacts with the magnet set to control the support (8) to move multi-axially within a plane parallel to the translation coil assembly (7). The focusing motor has a small size, low cost and good anti-vibration effect, can realize multiple optical zooming, and can fully meet the requirements of existing ultra-light and ultrathin intelligent portable mobile apparatuses.

Description

A focus motor capable of simultaneously achieving optical zoom and optical image stabilization

技术领域 Technical field

The present invention relates to a motor apparatus that controls lens motion.

Background technique

The existing handheld mobile devices are basically equipped with cameras, which enable people to record beautiful moments anytime and anywhere. When people use smart phones, tablet computers and other devices to take pictures, because there is no support of the tripod, the hands are easy to shake and cause jitter. Make the photos taken more blurred.

As shown in Figure 5, the publication number is CN103826053A. The patent document discloses an electronic device, a camera, and an optical anti-shake camera device. The prior art is provided with a plurality of translating coils 107 on the bottom side of the autofocus motor, that is, at the bottom of the inner base 106. The driving of the autofocus motor is slightly displaced in a plane parallel to the translational coil 107, and since its displaceable range in the plane is too small, it is difficult to perform function expansion.

In addition, the prior art requires the addition of other sets of components outside the autofocus motor, resulting in an overall lateral and longitudinal dimension of the product that is too large to be applied to existing smart portable mobile devices, and does not have an optical zoom function. Nor can it meet the needs of users well.

The prior art comprises a total of two sets of iron shells (the inner iron shell 104 and the outer iron shell 108) and two sets of bases (the inner base 106 and the outer base 105). , a plurality of springs (upper spring piece 110, lower elastic piece 130, and translation elastic piece 109), a plurality of magnets, a plurality of coils, and a lens mount (carrier 101) ), although a small anti-shake can be achieved, the volume and mass of the object to be driven are relatively large, that is, an iron shell (internal iron shell 104), a plurality of magnets (magnet 103), and a lens mount (carrier 101) need to be driven. ), lens, inner base 106, multiple springs (upper spring piece 110, lower spring piece 130, and translational spring piece 109) ), coils, resulting in high power consumption of the product, resulting in portable mobile devices can not provide the corresponding conditions.

Therefore, how to provide a small-sized focusing motor with remarkable anti-shake effect and multi-fold optical zoom function is a technical problem to be solved in the industry.

发明内容 Summary of the invention

In order to solve the above technical problems in the prior art, the present invention provides a focus motor capable of simultaneously achieving optical zoom and optical image stabilization, including an autofocus motor and a multi-fold optical zoom device disposed at one end of an autofocus motor yoke. The multi-fold optical zoom device includes, but is not limited to, a translation coil set mounted on an end face of the yoke, a bracket movably coupled to the translation coil set, a magnet set fixed to the bracket, and a lens group, the translation coil set and the The magnet group interacts and the control bracket performs multiple axial movements in a plane parallel to the translation coil set.

The autofocus motor used in the present invention can select different types and models according to needs, and provides an autofocus function to achieve different shooting effects in accordance with the multi-fold optical zoom device of the present invention.

In the technical solution, the multi-fold optical zoom device is provided with one or more translating FPC coils, two or more optical lenses, and a bracket, 1 One or more suspension springs and two or more first magnets, the coils are fixed on the surface of the metal yoke, and the optical lens (enlarged mirror) The magnifications are different, but are fixed in an array on the bracket, and the bracket is connected to the metal yoke by a suspension spring or a ball, the first magnet being fixed on the bracket and parallel to the coil.

The invention by translating FPC The coil interacts with the first magnet so that the bracket can move in a plane parallel to the end face of the metal yoke, achieving multiple optical zoom and significant optical image stabilization, and the product volume of the present invention is common on the market today. The autofocus motor without optical zoom and optical image stabilization is equivalent, and the height of the module can be controlled. Within 6 mm, it can meet the thickness requirements of various current mainstream smartphones. Its rich functionality and small size of the product itself make it compatible and applicable widely, and it has high market value.

DRAWINGS

Figure 1 is an exploded view of an embodiment of the present invention;

2 is an external view of an embodiment of the present invention;

Figure 3 is a cross-sectional view taken along line D-D of Figure 2;

Figure 4 is a top view of the present invention;

Figure 5 is an exploded view of the prior art.

具体实施方式 detailed description

Figure 1 to Figure 4 One embodiment of the present invention is shown in which the motor structure includes an autofocus motor and a multiple optical zoom device mounted at the end of the autofocus motor yoke.

The model of the autofocus motor can be selected as needed, such as a normal autofocus motor, open loop, closed loop, or multi-axis motor with optical image stabilization. In this embodiment, the autofocus motor includes a lens mount 1 A focusing coil 2 at one end, four second magnets 3, a spring piece 4, a casing composed of a metal yoke 5 and a bottom cover 6, and a component of a pin, the lens and the lens holder 1 are coaxial and parallel to the optical axis. Lens mount 1 The outer sleeve has a focusing coil 2 for focusing the lens. The inner wall of the yoke 5 is provided with a second magnet 3 interacting with the focus coil 2, and the second magnet 3 is a total of four pieces, which are evenly distributed on the yoke 5 The four inner walls are parallel to the four sides of the focus coil 2, and one side of the second magnet 3 toward the focus coil 2 is an S pole. Spring piece 4 The outer frame, the inner ring and the elastic strip connecting the outer ring and the inner ring, the outer frame of the spring piece is fixed by the magnet and the bottom cover, the inner ring of the spring piece and the end surface of the lens holder are fixedly connected, and the lens can be precisely controlled by the spring piece The amount of movement. Focus coil 2 When energized, the second magnet 3 generates a parallel optical axis force to the lens mount 1, and the lens mount 1 is moved back and forth in the direction of the optical axis to realize the autofocus function.

A multi-fold optical zoom device is disposed on an upper surface of the end portion of the eccentric motor yoke, including a translation coil group mounted on the end surface of the yoke 7 a bracket 8 movably connected to the translation coil group, a magnet group fixed to the bracket 8 and a lens group, the translation coil group 7 interacts with the magnet group, and the control bracket 8 Multi-axial movement is performed in a plane parallel to the translation coil set.

Wherein, the translation coil set includes at least 2 translating FPC coils 9, and in this embodiment, the translation FPC coil 9 is along the yoke 5 Four translating FPC coils are evenly arranged on the four edges of the end face, and each of the translating FPC coils has the same line direction, either clockwise winding or counterclockwise winding, and the opposite two translation FPC The coils can be connected in series, and the FPC used in the present invention The coil can completely replace the existing copper wire coil. The copper wire coil manufacturing process is very difficult, and it needs auxiliary automatic winding equipment and mold. The production efficiency and yield and the coil dimensional accuracy are relatively low, while FPC The coil adopts the very mature flexible circuit board manufacturing process, the precision is extremely high, the yield is extremely high, and the production efficiency is also extremely high, which greatly simplifies the production process of the coil and reduces the cost.

The magnet group is parallel to the plane in which the coil assembly is located, including at least 2 interacting with the translating FPC coil 9 disposed on the bracket 8 The first magnet of the block, in this embodiment, four first magnets 11 and four first magnets 11 are also disposed on the bracket opposite to the translational FPC coil. Both plane poles are used for magnetic injection, and the opposite sides of the opposite two first magnets have opposite polarities. The lens group is disposed at the center of the end surface of the bracket, surrounded by the first magnet, and the lens group needs to be evenly arranged for at least two lenses for magnification 10 In the present embodiment, four lenses 10 are employed and arranged in an array, the radius of the four lenses is always, and the magnification between them is different. Bracket 8 It can be connected to the metal yoke by a suspension spring or a ball.

When the translation FPC coil is energized, due to the magnetic field side of the magnet, a first magnet will be produced parallel to the translation FPC. The force of the plane of the coil, the force is perpendicular to the optical axis of the autofocus motor, so that the first magnet-driven bracket and the plurality of optical lenses of the same diameter move in multiple directions parallel to the plane of the translation coil group, when When the amount of movement of the holder is the radius of the optical lens, the optical axis of the lens of the autofocus can be switched between different magnifications of the optical lens (the multiplier) to realize the discrete multi-optic optical zoom. When the bracket performs a small translation on the basis of the above movement amount (the movement amount is smaller than the radius of the lens), the movement of the same optical lens relative to the optical axis center of the autofocus lens can be realized, and a small translation of the image is realized, which is sufficient to compensate for the hand shake. The image is moved to achieve optical image stabilization.

In addition, a Hall sensor for detecting the lateral and longitudinal movement of the bracket may be placed in the plane in which the coil group is located. It can accurately measure the horizontal position of the lens group and the bracket in two dimensions, realize closed-loop control, and achieve the most accurate position control of the lens.

It should be noted that although the present invention cannot achieve optical continuous zoom, it can achieve more than 10 in combination with electronic lossless zooming. Multiple continuous lossless zoom. The invention translating FPC through an autofocus motor The combination of the coil and the first magnet enables autofocus, optical zoom and optical image stabilization of the lens, and the mechanism is simple, small in size, and the height of the module can be controlled at 6 Within millimeters, it meets the thickness requirements of current mainstream smartphones and therefore has a very high market value.

The above specific embodiments are only intended to exemplify the structure of the present invention, and those skilled in the art can make various modifications and changes within the scope of the present invention.

Claims

A focus motor capable of simultaneously achieving optical zoom and optical image stabilization, comprising an autofocus motor, a multi-fold optical zoom device disposed at one end of an autofocus motor yoke, wherein: the multi-fold optical zoom device comprises: a translation coil set of the yoke end face, a bracket movably coupled to the translation coil set, a magnet set fixed to the bracket, and a lens group, the translation coil set interacting with the magnet group, and the control bracket is parallel to the translation coil Multiple axial movements are made in the plane of the group.
A focus motor capable of simultaneously achieving optical zoom and optical image stabilization according to claim 1, wherein said translation coil set comprises at least 2 The translating FPC coils are evenly disposed along the edges of the yoke end faces, and each of the translating FPC coils is clockwise wound or both are counterclockwise wound.
A focus motor capable of simultaneously achieving optical zoom and optical image stabilization according to claim 2, wherein: said set of magnets comprises at least two first magnets disposed on said bracket and interacting with said translating FPC coils, The first magnet uses a planar two-pole magnetic injection.
Claims 3 The focus motor capable of simultaneously achieving optical zoom and optical image stabilization, wherein the lens group is disposed at the center of the end surface of the bracket, and includes at least two lenses arranged in an array, and the magnification between the lenses is not the same.
As claimed in the claims 1-4 A focus motor capable of simultaneously achieving optical zoom and optical image stabilization according to any of the preceding claims, wherein the bracket is coupled to the yoke by a suspension spring or a ball.
As claimed in the claims 1-4 A focus motor capable of simultaneously achieving optical zoom and optical image stabilization according to any of the preceding claims, wherein the plane of the coil set is provided with a Hall sensor for detecting lateral and longitudinal movement of the bracket, respectively.
As claimed in the claims 1-4 A focus motor capable of simultaneously achieving optical zoom and optical image stabilization according to any of the preceding claims, wherein the autofocus motor comprises a housing composed of a bottom cover and a yoke, a lens mount provided in the housing, and a connection At least the end of the lens mount and the end of the housing A spring piece is disposed on the periphery of the lens holder with a focusing coil. The inner wall of the yoke is provided with a second magnet that interacts with the focusing coil, and the focusing coil controls the lens holder to move back and forth along the optical axis.
A focus motor capable of simultaneously achieving optical zoom and optical image stabilization according to claim 7, wherein said second magnet is uniformly disposed on the inner wall of the yoke. Block, the side of the second magnet facing the focus coil is an S pole.