TWI701494B - Shaftless anti-shake reflection module and periscope module - Google Patents

Abstract

The invention discloses a non-rotating shaft anti-shake reflection module and a periscope module. The shaftless anti-shake reflection module includes a fixed seat, a movable seat, a reflector/reflection beam, and an electromagnetic drive mechanism. The reflector/reflection beam is assembled on the movable seat; the movable seat is connected to the The fixed seat is connected to be suspended in the fixed seat; the electromagnetic drive mechanism includes an electromagnetic coil arranged on the fixed seat and a permanent magnet arranged on the movable seat. After the electromagnetic coil is energized and A combined force of a magnetic field is formed between the permanent magnets to drive the movable seat to drive the reflector/reflector to tilt; the set of elastic pieces forms a combined force of resilience, which acts together with the combined force of the magnetic field to make the movable seat Drive the mirror/reflector to stay at the tilt position required for anti-shake. There is no friction between the movable seat and the fixed seat in the shaftless anti-shake reflection module during anti-shake, so that the difference in driving force loss is small, and the difference in anti-shake accuracy is small, which is especially suitable for open-loop anti-shake solutions.

Description

Shaftless anti-shake reflection module and periscope module

The invention relates to the field of photography, in particular to a non-rotating anti-shake reflection module and a periscope module.

As users have higher and higher shooting requirements for mobile terminals such as mobile phones, the demand for periscope modules is also increasing. Unlike traditional CCM modules that are positioned for wide-angle shooting with small focal lengths, periscope modules The long-range shooting is positioned at 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 complement each other.

The periscope module mainly includes a reflection module and a lens module. The reflection module reflects the imaging light by 90° and then enters the lens module. The lens module performs focusing and imaging. In the anti-shake solution of the type module, the reflection module is generally responsible for the anti-shake on one axis, and the lens module is responsible for the anti-shake on the other axis. Among them, in the anti-shake structure of the reflection module, the movable seat that drives the mirror/reflector to rotate and anti-shake is generally connected to the shaft hole of the fixed seat through the rotating shafts on both ends of the middle axis direction, resulting in the movable seat When rotating, the rotating shaft will inevitably generate rotating friction with the shaft hole of the fixed seat. The rotating friction loses a part of the driving force and reduces the accuracy of the anti-shake drive. Moreover, the size of the rotating friction and the rotating shaft It is related to the tightness between the shaft holes. Even between the reflective modules produced by the same set of molds, the tightness between the shaft and the shaft hole will be different due to tolerances, not to mention the difference in mass production. Multiple sets of molds are used for production at the same time, so that when in use, the same set of anti-shake driving algorithm has large differences in the accuracy of anti-shake driving of different reflection modules. Therefore, Hall sensors must be used to sense the activity The true rotation angle of the seat enables the driving IC to adjust the driving current of the electromagnetic coil according to the true rotation angle of the movable seat, so that the movable seat can actually rotate to the rotation angle required for anti-shake.

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 friction between the movable seat and the fixed seat in the shaftless anti-shake reflection module during anti-shake, so that the difference in driving force loss is small, and the difference in anti-shake accuracy is small, which is especially suitable for open-loop anti-shake solutions.

The technical problem to be solved by the present invention is realized through the following technical solutions:

A shaft-less anti-shake reflection module, comprising a fixed seat, a movable seat, a mirror/reflection beam, and an electromagnetic drive mechanism. The mirror/reflection beam is assembled on the movable seat; the movable seat is passed through a spring plate assembly Is connected to the fixed seat so as to float in the fixed seat; the electromagnetic drive mechanism includes an electromagnetic coil arranged on the fixed seat and a permanent magnet arranged on the movable seat. After the electromagnetic coil is energized A combined force of a magnetic field is formed with the permanent magnet to drive the movable seat to drive the reflector/reflector to tilt; the set of elastic pieces forms a combined force of resilience, which acts together with the combined force of the magnetic field to make the movement The seat drives the reflector/reflector to stay at the inclined position required for anti-shake.

Further, the elastic piece group is composed of a first elastic piece and a second elastic piece, and the first elastic piece and the second elastic piece are both on the same side to unilaterally connect the movable seat and the fixed seat, so that the movable seat is The side connected to the fixed seat has a lower degree of freedom, while the opposite 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 The shrapnel tilts as the swing of the swing arm.

Further, the first elastic piece is connected to the movable seat and the fixed seat on the side of the movable seat facing away from the reflecting surface of the reflector/reflective rim, and the second elastic piece faces the movable seat The movable seat and the fixed seat are connected to the reflecting surface of the reflecting mirror/reflecting frame.

Further, the tilt position of the movable seat can be decomposed into a rotation angle around the central axis and a translation along the optical incident axis or the optical output axis.

Further, the electromagnetic coil and the permanent magnet are arranged along the direction of the optical axis, and the electromagnetic coil and the permanent magnet are relatively staggered along the direction of the optical axis; the first elastic piece and the second elastic piece are also arranged along the optical axis. The direction of the optical axis is set, and the plane where the first elastic piece and the second elastic piece are located is perpendicular to the direction of the light incident axis.

Further, the electromagnetic 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. The direction of the light output axis is set, and the plane where the first elastic piece and the second elastic piece are located is perpendicular to the direction of the light output axis.

Furthermore, it also includes a Hall sensor, which is used to obtain the tilt position of the movable seat and the mirror/reflective beam by sensing the constant magnetic field of the permanent magnet to realize closed-loop anti-shake.

Further, the direction of the resultant magnetic field and the direction of the resultant rebound force are not on the same straight line.

A periscope module includes the above-mentioned shaftless anti-shake reflection module.

The present invention has the following beneficial effects: the movable seat in the non-rotating anti-shake reflection module is suspended in the fixed seat through the elastic sheet group connection, and when the electromagnetic driving mechanism drives the movable seat to incline, The movable seat will not be interfered by the friction force from the fixed seat, so that the difference in driving force loss between different shaftless anti-shake reflection modules is small, and the difference in anti-shake accuracy under the same set of anti-shake driving algorithm Small, especially suitable for open-loop anti-shake solutions.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

The present invention will be described in detail below in conjunction with the drawings and embodiments.

Example one

As shown in Figures 1 and 2, a non-rotating anti-shake reflection module includes a fixed base 1, a movable base 2, a mirror/reflection frame 3, an electromagnetic drive mechanism, and the mirror/reflection frame 3 is assembled in the The movable seat 2; the movable seat 2 is connected to the fixed seat 1 through a set of shrapnel to be suspended in the fixed seat 1; the electromagnetic drive mechanism includes an electromagnetic coil 5 arranged on the fixed seat 1 And the permanent magnet 4 arranged on the movable seat 2. After the electromagnetic coil 5 is energized, a magnetic field resultant force is formed between the permanent magnet 4 to drive the movable seat 2 to drive the reflector/reflector 3 to produce Tilt; The elastic sheet group forms a resilience force, and the combined force of the magnetic field acts together, so that the movable seat 2 drives the mirror/reflection ridge 3 to stay in the tilt position required for anti-shake.

The movable seat 2 in the non-rotating anti-shake reflection module is suspended in the fixed seat 1 through the elastic sheet group connection. When the electromagnetic drive mechanism drives the movable seat 2 to tilt, the movable seat 2 It will not be interfered by the friction force from the fixed seat 1, so that the difference in driving force loss between different shaft-free anti-shake reflection modules is small, and the difference in anti-shake accuracy under the same set of anti-shake driving algorithm is small. Especially suitable for open-loop anti-shake solutions.

In this embodiment, the shrapnel group is composed of a first shrapnel 8 and a second shrapnel 9. Both the first shrapnel 8 and the second shrapnel 9 are on the same side for unilateralizing the movable seat 2 and the fixed seat 1. Connection, so that the side of the movable seat 2 connected to the fixed seat 1 has a lower degree of freedom, while the opposite side not connected to the fixed seat 1 has a higher degree of freedom; When the magnetic coil 5 is driven by the drive IC to generate a variable magnetic field, the combined force of the magnetic field formed between the variable magnetic field and the constant magnetic field of the permanent magnet 4 acts on the activity When the seat 2 is on, since the movable seat 2 has a smaller movement amount on the side connected to the fixed seat 1, while the opposite side that is not connected to the fixed seat 1 has a larger amount of movement, the movable seat 2 will form a swing tilt with the first elastic piece 8 and the second elastic piece 9 as the swing arm.

In this embodiment, the first elastic piece 8 is connected to the movable seat 2 and the fixed seat 1 on the side of the movable seat 2 facing away from the reflecting surface 31 of the reflector/reflective beam 3, and the second elastic piece 9 Connect the movable seat 2 and the fixed seat 1 on the side of the movable seat 2 facing the reflecting surface 31 of the reflector/reflector 3; the electromagnetic coil 5 and the permanent magnet 4 are both located on the reflecting mirror/ The reflection surface 3 is behind the reflection surface 31.

In anti-shake, the swing and tilt of the movable seat 2 can be decomposed into a rotation movement around its middle axis direction Y and a translation movement along the light incident axis direction X or light output axis direction Z, respectively corresponding to a movement around its middle axis direction. The rotation angle of Y and a translation along the direction of the light-in axis X or the direction of the light-out axis Z, where the rotation angle around the middle axis direction Y is determined by the CPU on the mobile phone and other terminals after detecting the user's hand shake according to the gyroscope. The calculated rotation angle of the mirror/reflector 3 to correct the jitter in the direction of the incident axis X; the amount of translation along the direction of the incident axis X or the direction of the output axis Z does not change the imaging light The direction of exit, so it will not affect the anti-shake.

Preferably, the magnetic field resultant force does not have a component force in the central axis direction Y of the movable seat 2. Similarly, the rebound resultant force does not have a component force in the central axis direction Y of the movable seat 2; the magnetic field The direction of the resultant force and the direction of the resultant rebound force are not on the same straight line, that is, there is a non-90° included angle between the resultant magnetic field and the resultant rebound force, or between the resultant magnetic field and the resultant rebound force The directions are parallel but the action points on the movable seat 2 are different.

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

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

Wherein, if the electromagnetic coil 5 and the permanent magnet 4 are arranged along the optical incident axis direction X, the first elastic piece 8 and the second elastic piece 9 are also arranged along the optical incident axis direction X, and the The planes on which the first elastic piece 8 and the second elastic piece 9 are located are perpendicular to the light-incident axis direction X; if the electromagnetic coil 5 and the permanent magnet 4 are arranged along the light-emitting axis direction Z, the first elastic piece 8 and The second elastic pieces 9 are also arranged along the light output axis direction Z, and the planes on which the first elastic pieces 8 and the second elastic pieces 9 are located are perpendicular to the light output axis direction Z.

The shaftless anti-shake reflection module is not only suitable for open-loop anti-shake solutions, but also suitable for closed-loop anti-shake solutions. That is, the shaft-less anti-shake reflection module also includes a Hall sensor 6 for passing through The constant magnetic field of the permanent magnet 4 is sensed to obtain the tilt position of the movable seat 2 and the reflector/reflector 3, so as to realize the closed-loop anti-shake.

During anti-shake, the Hall sensor 6 senses the constant magnetic field of the permanent magnet 4 to feed back the tilt position of the movable seat 2 to the driver IC, and then the driver IC responds to the movable seat 2 and the reflection The tilt position of the mirror/reflective ridge 3 adjusts the drive current of the electromagnetic coil 5.

In this embodiment, the Hall sensor 6 is arranged 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 of the electromagnetic coil 5.

In this embodiment, the fixed base 1 includes an assembly base 11 for accommodating the movable base 2 and the reflector/reflector 3 and connecting the elastic sheet set, and a set is arranged outside the assembly base 11. The metal shell 12 of the assembly seat 11 and the metal shell 12 are provided with light openings on the sides corresponding to the direction of the light incident axis X and the direction of the light output axis Y for the input and output of imaging light; The side of the electromagnetic coil 5 is also provided with an assembly port for connecting the circuit board 7 on which the electromagnetic coil 5 is mounted to an external driving IC.

The movable seat 2 includes a first assembly body 21 for assembling the reflector/reflecting ridge 3 and connecting the second elastic piece 9 and a first assembly body 21 for assembling the permanent magnet 4 and connecting the first elastic piece 8. The second assembly body 22, the axial directions of the first assembly body 21 and the second assembly body 22 are parallel to the central axis direction Y of the movable seat 2, wherein the second assembly body 22 is a prism with a cross section It is approximately a right-angled triangle and forms an integral structure with the first assembly body 21 facing away from the reflecting surface 31 of the reflecting mirror/reflective ridge 3 in a manner of oblique surfaces.

The reflective ridge 3 in this embodiment is a prismatic body whose axial direction is parallel to the central axis direction Y of the movable seat 2 and is assembled in the prismatic hollow groove of the first assembly body 21, and its incident surface and The exit surfaces are perpendicular to each other, and the reflective surface 31 reflects the imaging light incident from the incident surface by 90° and then exits from the exit surface; the cross section of the reflective ridge 3 is approximately a right triangle, and the reflective surface The angle between 31 and the incident surface and the exit surface is 45°. According to specific requirements, the cross-section of the reflective ridge 3 can also be approximately a right-angled trapezoid. At this time, in order to fit the reflective ridge 3, the cross-section of the first assembly 21 of the movable seat 2 is also approximately It is a right-angled trapezoid.

The incident surface of the reflective ridge 3 slightly protrudes from the surface of the fixed seat 1, and the edge of the exit surface is clamped by the edge folds extending inward from the corresponding side edge of the movable seat 2 to prevent Decline.

Example two

A periscope module includes the non-rotating anti-shake reflection module and the anti-shake focusing lens module described in the first embodiment, and the light incident end of the anti-shake focusing lens module is set on the non-rotating anti-shake After the light output end of the reflection module, the anti-shake focusing lens module has a focusing function in the direction of the light output axis Z of the non-rotating anti-shake reflection module and an anti-shake function in the direction Y of the central axis of the movable seat 2 .

The above-mentioned embodiments only express the implementation of the present invention. The description is more specific and detailed, but it should not be understood as a limitation on the scope of the present invention. However, all technical solutions obtained by equivalent substitutions or equivalent transformations , Should fall within the protection scope of the present invention.

1: fixed seat 11: Assembly seat 12: Metal shell 2: movable seat 21: The first assembly 22: The second assembly 3: Reflector/Reflection Mirror 31: reflective surface 4: permanent magnet 5: Electromagnetic coil 6: Hall sensor 7: circuit board 8: The first shrapnel 9: second shrapnel X: incident light axis direction Y: Central axis direction Z: direction of light axis

FIG. 1 is a cross-sectional view of a shaft-less anti-shake reflection module provided by the present invention; 2 is an exploded view of the anti-shake reflection module without rotating shaft provided by the present invention.

1: fixed seat

11: Assembly seat

12: Metal shell

2: movable seat

21: The first assembly

22: The second assembly

3: Reflector/Reflection Mirror

31: reflective surface

4: permanent magnet

5: Electromagnetic coil

6: Hall sensor

7: circuit board

8: The first shrapnel

9: second shrapnel

X: incident light axis direction

Z: direction of light axis

Claims (8)

A shaft-less anti-shake reflection module, comprising a fixed seat, a movable seat, a mirror/reflection beam, and an electromagnetic drive mechanism. The mirror/reflection beam is assembled on the movable seat; characterized in that, the movable seat The seat is connected to the fixed seat through the elastic sheet group so as to be suspended in the fixed seat; the electromagnetic drive mechanism includes an electromagnetic coil arranged on the fixed seat and a permanent magnet arranged on the movable seat. After the electromagnetic coil is energized, a magnetic field resultant force is formed between the permanent magnet to drive the movable seat to drive the reflector/reflector to tilt; the elastic piece group forms a rebound resultant force, which acts together with the magnetic field resultant force, So that the movable seat drives the reflector/reflector to stay at the tilt position required for anti-shake; the elastic sheet group is composed of a first elastic sheet and a second elastic sheet, and the first elastic sheet and the second elastic sheet are both The movable seat and the fixed seat are connected on one side on the same 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 a lower degree of freedom. The side has a higher degree of freedom; the movable seat forms a swing tilt with the first elastic piece and the second elastic piece as a swing arm. As described in the first item of the scope of patent application, the non-rotating anti-shake reflection module is characterized in that the first elastic piece is connected to the reflective surface of the movable seat facing away from the reflecting mirror/reflecting mirror. A movable seat and a fixed seat, and the second elastic piece is connected to the movable seat and the fixed seat on the side of the movable seat facing the reflecting surface of the reflecting mirror/reflector. As described in the first item of the scope of patent application, the non-rotating anti-shake reflection module is characterized in that the tilt position of the movable seat can be decomposed into a rotation angle around the central axis and a direction along the optical axis or the optical axis. The amount of translation. As described in the first item of the scope of patent application, the non-rotating anti-shake reflection module is characterized in that the electromagnetic coil and the permanent magnet are arranged along the direction of the optical axis, and the electromagnetic coil and the permanent magnet are arranged along the light-emitting axis. The axis directions are relatively staggered; the first elastic piece and the second elastic piece are also arranged along the light incident axis direction, and the planes where the first elastic piece and the second elastic piece are located are perpendicular to the light incident axis direction. As described in item 1 of the scope of patent application, the non-rotating anti-shake reflection module is characterized in that the electromagnetic coil and the permanent magnet are arranged along the optical axis direction Z, and the electromagnetic coil and the permanent magnet are arranged along the direction Z. The direction of the optical axis is relatively staggered; the first elastic piece and the second elastic piece are also arranged along the light output axis direction, and the planes where the first elastic piece and the second elastic piece are located are perpendicular to the light output axis direction. The shaftless anti-shake reflection module described in item 1 of the scope of patent application is characterized in that it also includes a Hall sensor for sensing the constant magnetic field of the permanent magnet to obtain the movable seat and The tilt position of the reflector/reflector to achieve closed-loop anti-shake. The shaftless anti-shake reflection module as described in item 1 of the scope of patent application is characterized in that the direction of the resultant magnetic field and the direction of the resultant rebound force are not on the same straight line. A periscope module, which is characterized by comprising the shaftless anti-shake reflection module as described in any one of items 1 to 7 of the scope of patent application.

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