WO2020103168A1

WO2020103168A1 - Shaftless anti-shake reflection module and periscope module

Info

Publication number: WO2020103168A1
Application number: PCT/CN2018/117363
Authority: WO
Inventors: 谢荣富
Original assignee: 信利光电股份有限公司
Priority date: 2018-11-22
Filing date: 2018-11-26
Publication date: 2020-05-28
Also published as: TW202020545A; CN109407441A; CN109407441B; TWI701494B

Abstract

A shaftless anti-shake reflection module and a periscope module. The shaftless anti-shake reflection module comprises a fixed base (1), a movable base (2), a reflection mirror/prism (3), and an electromagnetic driving mechanism. The reflection mirror/prism (3) is mounted on the movable base (2). The movable base (2) is connected to the fixed base (1) by means of an elastic piece group, such that the movable base (2) is suspended in the fixed base (1). The electromagnetic driving mechanism comprises an electromagnetic coil (5) provided on the fixed base (1) and a permanent magnet (4) provided on the movable base (2). When the electromagnetic coil (5) is energized, a magnetic field resultant force is formed between the permanent magnet (4) and the electromagnetic coil (5) to drive the movable base (2) to tilt the reflection mirror/prism (3). The elastic piece group forms a rebound resultant force, and the magnetic field resultant force and the rebound resultant force together cause the movable base (2) to drive the reflection mirror/prism (3) to remain at an inclined position as required for an anti-shake function. During an anti-shake process, no friction is generated between the movable base (2) and the fixed base (1) in the shaftless anti-shake reflection module, such that a driving force loss difference is small.

Description

Invention name: Shaftless anti-shake reflection module and periscope moduleTechnical field

[0001] The present invention relates to the field of imaging, and in particular to a shaftless anti-shake reflection module and a periscope module.

Background technique

[0002] As users have higher and higher requirements for the shooting of mobile terminals such as mobile phones, the demand for periscope modules is also increasing, which is different from the wide-angle shooting of traditional CCM modules positioned at small focal lengths. The module is positioned for long-distance shooting with a large focal length, and its long-range shooting performance can reach the level of a professional camera. Therefore, if the CCM module and the periscope module are used together, they can play a good role in complementary functions.

[0003] The periscope module mainly includes a reflection module and a lens module. The reflection module reflects the imaging light at 90 ° and then enters the lens module. The lens module performs focusing and imaging. In the anti-shake solution of the group, the reflection module is generally responsible for anti-shake on one axis, and the lens module is responsible for anti-shake on the other axis. Wherein, in the anti-shake structure of the reflection module, the movable base that drives the mirror / reflecting prism to perform anti-shake rotation is generally connected to the shaft hole of the fixed base through the rotating shafts at both ends in the axial direction, causing the movable base to rotate At this time, the rotating shaft inevitably generates rotating friction with the shaft hole of the fixed seat, the rotating friction loses a part of the driving force, reducing the accuracy of anti-shake driving, and the magnitude of the rotating friction and the rotating shaft and the shaft The tightness between the holes is related. Even between the reflective modules produced using the same set of molds, the tightness between the rotating shaft and the shaft hole will also be different due to tolerances, not to mention it will be used at the same time during mass production. Multiple sets of molds are produced, so that when used, the same set of anti-shake driving algorithms has a large difference in the accuracy of anti-shake driving of different reflection modules. Therefore, a Hall sensor must be used to sense the true rotation angle of the movable seat, so that The drive 1C can adjust the drive current of the electromagnetic coil according to the true rotation angle of the movable base, so that the movable base can be truly rotated to the rotation angle required for anti-shake.

Summary of the invention

technical problem

Solution to the problem

Technical solution [0004] In order to solve the above-mentioned shortcomings of the prior art, the present invention provides a shaftless anti-shake reflection module and a periscope module. There is no frictional force between the movable seat and the fixed seat in the anti-shake reflection module of the non-rotating shaft during anti-shake, so that the difference in driving force loss is small and the difference in anti-shake accuracy is particularly suitable for open-loop anti-shake solutions.

[0005] The technical problem to be solved by the present invention is achieved by the following technical solutions:

[0006] An anti-shake anti-shake reflection module includes a fixed seat, a movable seat, a reflector / reflecting prism, and an electromagnetic drive mechanism, the reflector / reflecting prism is assembled on the movable seat; the movable seat passes through the elastic sheet The group is connected to the fixed base to be suspended in the fixed base; the electromagnetic driving mechanism includes an electromagnetic coil provided on the fixed base and a permanent magnet provided on the movable base, and the electromagnetic coil is energized A magnetic field resultant force is formed between the rear and the permanent magnets to drive the movable seat to drive the mirror / reflecting prism to tilt; the elastic sheet group forms a resilient resultant force that cooperates with the magnetic field resultant force to cause the activity The seat drives the reflector / reflecting prism to stay in the inclined position required for anti-shake.

[0007] Further, the shrapnel group is composed of a first shrapnel and a second shrapnel, the first shrapnel and the second shrapnel are connected on one side to the movable seat and the fixed seat, so that the One side of the movable seat connected to the fixed seat has a lower degree of freedom, but the other side not connected to the fixed seat has a higher degree of freedom; the movable seat is formed with the first elastic piece And the second shrapnel tilts as a swing arm swing.

[0008] Further, the first elastic piece is connected to the movable seat and the fixed seat on the reflective surface of the movable seat facing away from the reflector / reflecting prism, and the second elastic piece faces the movable seat The reflecting surface of the reflecting mirror / reflecting prism is connected to the movable seat and the fixed seat on one side.

[0009] Further, the tilt position of the movable base can be decomposed into a rotation angle around the central axis and a translation along the direction of the optical axis or the direction of the optical axis.

[0010] Further, the electromagnetic coil and the permanent magnet are arranged along the optical axis direction, and the electromagnetic coil and the permanent magnet are relatively staggered along the optical axis direction; between the first elastic piece and the second elastic piece It is also set along the optical axis direction, and the planes on which the first and second elastic pieces are located are both perpendicular to the optical axis direction.

[0011] Further, the electromagnetic coil and the permanent magnet are arranged along the optical axis direction Z, the electromagnetic coil and the permanent magnet are relatively staggered along the optical axis direction; the first elastic piece and the second elastic piece It is also set along the direction of the optical axis, and the planes on which the first and second elastic sheets are located are all opposite to the direction of the optical axis Vertical.

[0012] Further, a Hall sensor is further included for sensing the constant magnetic field of the permanent magnet to obtain the tilting position of the movable base and the reflector / reflecting prism to achieve closed-loop anti-shake.

[0013] Further, the direction of the resultant magnetic field and the direction of the resilience resultant force are not on the same straight line.

[0014] A periscope module includes the above-mentioned anti-shake anti-shake reflection module.

Beneficial effects of invention

Beneficial effect

[0015] The present invention has the following beneficial effects: The movable base in the non-rotation shaft anti-shake reflection module is connected and suspended in the fixed base through the elastic sheet group, and the electromagnetic drive mechanism drives the movable base to tilt during the process In this case, the movable seat will not be disturbed by the friction force from the fixed seat, so that the difference in driving force loss between different non-rotation shaft anti-shake reflection modules is small, and the difference in anti-shake accuracy under the same anti-shake drive algorithm Small, especially suitable for open-loop anti-shake solutions.

Brief description of the drawings

BRIEF DESCRIPTION

[0016] FIG. 1 is a cross-sectional view of a shaft-free anti-shake reflection module provided by the present invention;

[0017] FIG. 2 is an exploded view of the anti-shake reflection module provided by the present invention.

Invention Example

Embodiments of the invention

[0018] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0019] Embodiment One

[0020] As shown in FIGS. 1 and 2, a shaft-free anti-shake reflection module includes a fixed base 1, a movable base 2, a reflector / reflecting prism 3, an electromagnetic drive mechanism, and the reflector / reflecting prism 3 is assembled in The movable seat 2; The movable seat 2 is connected to the fixed seat 1 through an elastic sheet set to be suspended in the fixed seat 1; The electromagnetic driving mechanism includes an electromagnetic coil provided on the fixed seat 1 5 and the permanent magnet 4 provided on the movable base 2, a magnetic field force is formed between the electromagnetic coil 5 and the permanent magnet 4 after being energized, to drive the movable base 2 to drive the reflector / reflecting prism 3 to generate Tilt; the elastic sheet group forms a resilience resultant force, which acts together with the magnetic field resultant force, so that the movable seat 2 drives the reflector / reflecting prism 3 to stay at the level required for anti-shake Tilted position.

[0021] The movable base 2 in the anti-shake anti-shake reflection module is connected and suspended in the fixed base 1 through the shrapnel group

During the tilting process of the movable seat 2 driven by the electromagnetic drive mechanism, the movable seat 2 will not be disturbed by the frictional force from the fixed seat 1, so that the difference between the non-rotation shaft anti-shake reflection modules The difference in driving power loss is small, and the difference in anti-shake accuracy under the same anti-shake drive algorithm is small, which is especially suitable for open-loop anti-shake solutions.

[0022] In this embodiment, the shrapnel group is composed of a first shrapnel 8 and a second shrapnel 9, the first shrapnel 8 and the second shrapnel 9 both face the movable seat 2 and the fixed seat 1 on the same side One-sided connection is made, so that the side of the movable seat 2 connected to the fixed seat 1 has a lower degree of freedom, and the opposite side that is not connected to the fixed seat 1 has a higher degree of freedom; During anti-shake, the drive 1C passes a drive current to the electromagnetic coil 5 to generate a variable magnetic field. The resultant magnetic field formed between the variable magnetic field and the permanent magnetic field of the permanent magnet 4 acts on When the movable base 2 is moved, the side of the movable base 2 that is connected to the fixed base 1 has a small amount of movement, but the other side that is not connected to the fixed base 1 has a large amount of movement, so The movable seat 2 will form a swinging tilt with the first elastic piece 8 and the second elastic piece 9 as swing arms.

[0023] In this embodiment, the first elastic sheet 8 connects the movable seat 2 and the fixed seat 1 on the reflective surface 31 of the movable seat 2 facing away from the reflector / reflecting prism 3, the The second elastic piece 9 connects the movable base 2 and the fixed base 1 on the reflecting surface 31 of the movable base 2 facing the reflector / reflecting prism 3; the electromagnetic coil 5 and the permanent magnet 4 are located at the The reflecting surface 31 of the reflecting mirror / reflecting prism 3 is behind.

[0024] During anti-shake, the swinging tilt of the movable base 2 can be decomposed into a rotation around the axis direction Y and a translational motion along the optical axis direction X or the optical axis direction Z, respectively corresponding to a The rotation angle in the axis direction Y and a translation amount along the optical axis direction X or the optical axis direction Z, where the rotation angle around the axis direction Y is the CPU on the mobile phone and other terminals that detects the user's hand The rotation angle calculated by the mirror / reflecting prism 3 required for correcting the jitter in the direction X of the optical axis after the shaking; and the amount of translation along the direction X of the optical axis or the direction Z of the optical axis does not change The exit direction of the imaging light, so it will not affect the anti-shake.

[0025] Preferably, the resultant force of the magnetic field does not have a component force in the central axis direction Y of the movable seat 2, and similarly, the resilience force does not have a force component in the central axis direction Y of the movable seat 2. Force; the direction of the magnetic field resultant force and the direction of the resilience resultant force are not on the same straight line, that is, between the magnetic field resultant force and the resilience resultant force There is a non-90 ° included angle, or the direction between the resultant magnetic field force and the resilience resultant force is parallel but the point of action on the movable seat 2 is different.

In this embodiment, the magnetic field direction of the variable magnetic field generated by the energization of the electromagnetic coil 5 is perpendicular to the central axis direction Y of the movable base 2, and similarly, the magnetic field direction of the constant magnetic field generated by the permanent magnet 4 Also perpendicular to the central axis direction Y of the movable seat 2; the first resilient force of the first elastic piece 8 to the movable base 2 is perpendicular to the central axis direction Y of the movable seat 2, similarly, the first The second elastic force of the second elastic piece 9 to the movable seat 2 is also perpendicular to the central axis direction Y of the movable seat 2.

[0027] The direction of the resultant magnetic field has a certain angle with the optical axis direction X and the optical axis direction Z. Specifically, if the electromagnetic coil 5 and the permanent magnet 4 are arranged along the optical axis direction X, then the electromagnetic coil 5 and the permanent magnet 4 need to be slightly offset along the optical axis direction Z; if the electromagnetic The coil 5 and the permanent magnet 4 are arranged along the direction of the optical axis Z, then the electromagnetic coil 5 and the permanent magnet 4 need to be slightly offset along the direction X of the optical axis.

[0028] Wherein, if the electromagnetic coil 5 and the permanent magnet 4 are arranged along the optical axis direction X, then the first elastic sheet 8 and the second elastic sheet 9 are also arranged along the optical axis direction X, And the planes of the first elastic piece 8 and the second elastic piece 9 are both perpendicular to the optical axis direction X; if the electromagnetic coil 5 and the permanent magnet 4 are arranged along the optical axis Z direction, the first The elastic piece 8 and the second elastic piece 9 are also arranged along the optical axis direction Z, and the planes where the first elastic piece 8 and the second elastic piece 9 are located are both perpendicular to the optical axis direction Z.

[0029] In addition to the open-loop anti-shake solution, the non-rotation shaft anti-shake reflection module is also applicable to a closed-loop anti-shake solution, that is, the non-rotation shaft anti-shake reflection module further includes a Hall sensor 6 for passing The constant magnetic field of the permanent magnet 4 is measured to obtain the tilt positions of the movable base 2 and the reflector / reflecting prism 3 to achieve closed-loop anti-shake.

[0030] During anti-shake, the Hall sensor 6 senses the permanent magnetic field of the permanent magnet 4 to feed back the tilting position of the movable base 2 to the drive 1C, and then the drive 1C is based on the movable base 2 and The tilting position of the mirror / reflecting prism 3 adjusts the driving current of the electromagnetic coil 5.

[0031] In this embodiment, the Hall sensor 6 is provided and electrically connected to the circuit board 7 on which the electromagnetic coil 5 is mounted, and is located at the center of the coil as the electromagnetic coil 5.

[0032] In this embodiment, the fixed base 1 includes an assembly base 11 for accommodating the movable base 2 and the reflector / reflecting prism 3 and the elastic sheet group, and a set of the assembly base 11 outside the metal casing 12, the assembly seat 11 and the metal casing 12 are opened on the side corresponding to the optical axis direction X and the optical axis direction Y There is a light port for the imaging light to enter and exit; in addition, a mounting port is also opened on the side corresponding to the electromagnetic coil 5 for the circuit board 7 carrying the electromagnetic coil 5 to be connected to the external drive 1C.

[0033] The movable base 2 includes a first assembly body 21 for assembling the mirror / reflecting prism 3 and the second elastic piece 9 and an assembly of the permanent magnet 4 and the first elastic piece 8, the second assembly 22, the first assembly 21 and the second assembly 22 are both axially parallel to the central axis direction Y of the movable seat 2, wherein the second assembly 22 is a prism The cross section is substantially a right triangle, and forms an integrated structure with the inclined surface of the first assembly 21 facing away from the reflecting surface 31 of the reflector / reflecting prism 3.

[0034] The reflective prism 3 in this embodiment is a prism body with an axial direction parallel to the central axis direction Y of the movable base 2, and is assembled in a prismatic cavity of the first assembly body 21, which The incident surface and the exit surface are perpendicular, and the reflective surface 31 reflects the imaging light incident from the incident surface by 90 ° and exits from the exit surface; the cross section of the reflective prism 3 is approximately a right triangle, The reflecting surface 31 forms an angle of 45 ° with the incident surface and the exit surface, respectively. According to specific requirements, the cross-section of the reflecting prism 3 may also be approximately a right-angled trapezoid. At this time, in order to adapt to the reflecting prism 3, the cross-section of the first assembly 21 of the movable base 2 is also approximately a right-angle Trapezoid.

[0035] The incident surface of the reflecting prism 3 slightly protrudes from the surface of the fixed base 1, and the edge of the exit surface is caught by an edge folded edge extending inward from the corresponding side edge of the movable base 2, In case of a slip.

Embodiment 2

[0037] A periscope module includes the non-rotation axis anti-shake reflection module and the anti-shake focus lens module described in the first embodiment, and the light-incoming end of the anti-shake focus lens module is disposed on the non-rotation axis anti-shake After shaking the light-emitting end of the reflection module, the anti-shake focusing lens module has a focusing function in the light-emitting axis direction Z of the non-rotation-axis anti-shake reflection module and an anti-shake function in the central axis direction Y of the movable base 2.

[0038] The above-mentioned examples only express the implementation of the present invention, the description is more specific and detailed, but it should not be understood as a limitation of the patent scope of the present invention, which is obtained in the form of equivalent replacement or equivalent transformation All technical solutions should fall within the protection scope of the present invention.

Claims

[Claim 1] An anti-shake anti-shake reflection module, including a fixed seat, a movable seat, a reflector / reflecting prism, and an electromagnetic drive mechanism, the reflector / reflecting prism is assembled on the movable seat; characterized in that, The movable seat is connected to the fixed seat through an elastic sheet group to be suspended in the fixed seat; the electromagnetic driving mechanism includes an electromagnetic coil provided on the fixed seat and a permanent magnet provided on the movable seat , After the electromagnetic coil is energized, a magnetic field resultant force is formed between the permanent magnets to drive the movable seat to drive the mirror / reflecting prism to tilt; the elastic sheet group forms a rebound resultant force, which is combined with the magnetic field resultant force Function, so that the movable seat drives the reflector / reflecting prism to stay in the inclined position required for anti-shake.

[Claim 2] The anti-shake anti-shake reflection module according to claim 1, wherein the shrapnel group is composed of a first shrapnel and a second shrapnel, and the first shrapnel and the second shrapnel are on the same side The movable seat and the fixed seat are connected on one side, so that the side of the movable seat connected to the fixed seat has a lower degree of freedom, and the other side that is not connected to the fixed seat has High degree of freedom; the movable seat forms a swinging tilt with the first spring piece and the second spring piece as swing arms.

[Claim 3] The anti-shake anti-shake reflection module according to claim 1 or 2, wherein the first elastic piece is connected on a side of the movable base facing away from the reflecting surface of the reflecting mirror / reflecting prism For the movable seat and the fixed seat, the second elastic piece connects the movable seat and the fixed seat on the reflecting surface of the movable seat facing the reflecting mirror / reflecting prism.

[Claim 4] The anti-shake anti-shake reflection module according to claim 1 or 2, characterized in that the tilt position of the movable base can be decomposed into a rotation angle around the central axis and a direction along the optical axis Or the amount of translation in the direction of the optical axis.

[Claim 5] The anti-shake anti-shake reflection module according to claim 2, wherein the electromagnetic coil and the permanent magnet are arranged along the optical axis direction, and the electromagnetic coil and the permanent magnet are arranged along The direction of the optical axis is relatively staggered; the first elastic sheet and the second elastic sheet are also arranged along the optical axis direction, and the planes on which the first elastic sheet and the second elastic sheet are located are both perpendicular to the optical axis direction.

[Claim 6] The anti-shake anti-shake reflection module according to claim 2, characterized in that the electromagnetic The coil and the permanent magnet are arranged along the optical axis direction z, and the electromagnetic coil and the permanent magnet are relatively staggered along the optical axis direction; the first elastic piece and the second elastic piece are also arranged along the optical axis direction, And the plane where the first elastic piece and the second elastic piece are located is perpendicular to the direction of the optical axis.

[Claim 7] The anti-shake anti-shake reflection module according to claim 1, further comprising a Hall sensor for acquiring the movable seat and the reflection by sensing the constant magnetic field of the permanent magnet The tilt position of the mirror / reflecting prism realizes closed-loop anti-shake.

[Claim 8] The anti-shake anti-shake reflection module according to claim 1, wherein the direction of the magnetic field resultant force and the direction of the rebound resultant force are not on the same straight line.

[Claim 9] A periscope module, characterized by comprising the anti-shake anti-shake reflection module according to any one of claims 1-8.