CN211402898U - Reflection module and periscopic camera - Google Patents

Abstract

The utility model provides a reflection module and a periscope camera. The reflection module comprises a casing, a base, a prism bracket, a prism, a first rotating shaft for rotatingly connecting the casing and the base, and a second rotating shaft connecting the base and the prism support. Two rotating shafts, a first driving assembly that drives the base to rotate around the first rotating shaft, and a second driving assembly that drives the prism bracket to rotate around the second rotating shaft. The first drive assembly includes a first coil fixed relative to the housing and a second drive fixed on the base A magnetic steel, the second driving component includes a second coil fixed relative to the casing and a second magnetic steel fixed to the prism bracket, the reflection module further includes a side of the first coil away from the first magnetic steel and fixed relative to the casing The first magnetic conductive plate and the second magnetic conductive plate arranged on the side of the second coil away from the second magnetic steel and fixed relative to the casing. Compared with the related art, the reflection module and the periscope camera of the present invention can reduce or even avoid the influence of magnetic interference on the rotation and reset of the base and the prism bracket.

Description

Reflective module and periscope camera

technical field

The utility model relates to the field of periscope cameras, in particular to a reflection module and a periscope camera using the reflection module.

Background technique

The main function of OIS (optical image stabilization) is to adjust the field of view of the camera to compensate for the user's hand shake. OIS is mainly achieved through "lens shift", that is, when the lens is moved or the camera is tilted, the lens and image sensor will be tilted together. At present, the industry uses reflective modules to achieve better optical image stabilization effects.

The reflective module in the related art includes a base with an accommodation space, a base and a prism bracket arranged in the accommodation space, a prism fixed on the prism bracket, a first shaft for rotating the connection between the base and the base, and a rotating connection between the base and the prism. The second rotating shaft of the bracket, the first driving assembly for driving the base to rotate around the first rotating shaft, the second driving assembly for driving the prism support to rotate around the second rotating shaft, and the reset assembly for resetting the base or the prism support, wherein the base When rotating around the first rotating shaft, the prism bracket can be driven to rotate together. However, this kind of reflection module needs to use more magnetic steel to realize the rotation and reset of the base or the prism support, wherein the difference between the magnetic steel for realizing the rotation of the base and the prism support and the magnetic steel for realizing the rotation and reset of the base and the prism support There will be magnetic interference between them.

Therefore, it is necessary to provide a new reflection module to solve the above technical problems.

SUMMARY OF THE INVENTION

The purpose of the present utility model is to provide a reflection module, which can realize the rotation and reset of the base and the prism bracket by using less magnetic steel, thereby reducing or even avoiding the rotation of the base and the prism bracket due to magnetic interference. and reset effects.

In order to achieve the above purpose, the present invention provides a reflection module, which includes a housing with a receiving space, a base and a prism support arranged in the housing, a prism fixed on the prism support, and a rotatable connection to the housing. and the first rotating shaft of the base, the second rotating shaft rotatably connecting the base and the prism support, the first driving component that drives the base to rotate around the first rotating shaft, and the prism support The second drive assembly rotated by the second shaft, the axis of the first shaft and the axis of the second shaft are perpendicular to each other, the first drive assembly includes a first coil fixed relative to the housing and a The first magnetic steel of the base, the second driving component includes a second coil fixed relative to the casing and a second magnetic steel fixed to the prism bracket, and the reflection module further includes a A first magnetic conducting plate on the side of the coil away from the first magnetic steel and fixed relative to the casing, and a second magnetic conducting plate on the side of the second coil away from the second magnetic steel and fixed relative to the casing Magnetic plate.

Preferably, the first magnetic steel and the second magnetic steel are both quadrupole magnetic steels.

Preferably, a flexible circuit board electrically connected to the first coil and the second coil is fixed on the casing.

Preferably, the casing is provided with a first opening and a second opening, the flexible circuit board is arranged around the casing and covers the first opening and the second opening, the first coil and the second opening are Two coils are respectively located in the first opening and the second opening and are fixed to the flexible circuit board, the first magnetic conductive plate and the second magnetic conductive plate are fixed to the flexible circuit board away from the on one side of the enclosure.

Preferably, a first reinforcing plate and a second reinforcing plate are fixed on the side of the flexible circuit board away from the casing, and a first through hole is formed through the first reinforcing plate, and the first guide plate is The magnetic plate is located in the first through hole, a second through hole is formed through the second reinforcing plate, and the second magnetic conductive plate is located in the second through hole.

Preferably, first limiting blocks are respectively provided at opposite ends of the base along the axis direction parallel to the second rotating shaft, and the first limiting blocks are close to the first coil from the base. One side is extended and formed, wherein the base is rotatable around the first rotation axis until the first limiting block is in contact with the housing.

Preferably, the rotation angle of the base is α, -2°≤α≤2°.

Preferably, the prism bracket is rotatable around the second axis of rotation to the second limit block extending from two opposite ends of the prism bracket along the axis direction parallel to the first axis of rotation. The stopper is in contact with the base.

Preferably, the rotation angle of the prism support is β, where -2°≤β≤2°.

Preferably, the base is provided with a first accommodating groove, one end of the first rotating shaft passes through the casing and is fixed to the casing, and the other end is inserted into the first accommodating groove, and the prism bracket A second accommodating groove is provided on it, one end of the second rotating shaft passes through the base and is fixed with the base, and the other end is inserted into the second accommodating groove.

Preferably, the inner wall of the first accommodating groove and the inner wall of the second accommodating groove are both concave spherical surfaces, the first rotating shaft is inserted into the end of the first accommodating groove and the second rotating shaft is inserted into the first accommodating groove. The ends of the two receiving grooves are both convex spherical surfaces.

Preferably, the base is further provided with an escape opening at the position facing the second magnetic steel, and the end of the second magnetic steel away from the prism bracket is inserted into the escape opening.

The utility model also provides a periscope camera, the periscope camera comprising the reflection module described in any one of the above.

Compared with the related art, in the reflection module of the present invention, a first magnetic conducting plate fixed relative to the casing is arranged on the side of the first coil away from the first magnetic steel, and the second coil is away from all One side of the second magnetic steel is provided with a second magnetic conductive plate fixed relative to the casing, so that the first magnetic conductive plate and the first magnetic steel constitute a first magnetic spring and the second magnetic conductive plate and the The second magnetic steel constitutes a second magnetic spring, and when the first magnetic conductive plate and the first magnetic steel and the second magnetic conductive plate and the second magnetic steel are relatively dislocated, a restoring force can be generated. The base and the prism support are respectively driven to rotate and reset. In this way, the reflection module can use the magnetic steel that drives the base and the prism support to reset the base and the prism support, thereby reducing the use of magnetic steel to reduce or even avoid magnetic interference. At the same time, it can reduce the production cost and simplify the structure of the reflection module; on the other hand, the first magnetic conductive plate and the second magnetic conductive plate can also improve the Lorentz force of the first coil and the second coil.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

1 is an exploded view of a preferred embodiment of a reflection module of the present invention;

Fig. 2 is the structural representation of the base in the reflection module shown in Fig. 1;

Fig. 3 is the structural representation of the base in the reflection module shown in Fig. 1;

Fig. 4 is the structural representation of the prism bracket in the reflection module shown in Fig. 1;

FIG. 5 is a perspective view of the reflective module shown in FIG. 1 after being assembled;

6 is a cross-sectional view of the reflection module shown in FIG. 5 along the A-A direction;

Fig. 7 is an enlarged view of part D in the reflection module shown in Fig. 6;

8 is a cross-sectional view of the reflection module shown in FIG. 5 along the B-B direction;

Fig. 9 is an enlarged view of part E in the reflection module shown in Fig. 8;

10 is a schematic diagram of the motion principle of the base of the present invention;

FIG. 11 is a schematic diagram of the movement principle of the prism support of the present invention.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, but not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIG. 1 to FIG. 11 , the reflection module includes a housing 1 with a receiving space 100 , a base 2 and a prism bracket 3 arranged in the housing 1 , a prism 4 fixed on the prism bracket 3 , and a rotatable connection The first rotating shaft 5 of the casing 1 and the base 2 , the second rotating shaft 6 rotatably connecting the base 2 and the prism bracket 3 , and the second rotating shaft 6 that drives the base 2 to rotate around the first rotating shaft 5 . The first driving component 7 and the second driving component 8 for driving the prism support 3 to rotate around the second rotating shaft 6, the axis of the first rotating shaft 5 and the axis of the second rotating shaft 6 are perpendicular to each other.

As shown in FIG. 6 and FIG. 8 , two opposite sides of the base 2 are respectively provided with the first rotating shafts 5 , and the axes of the two first rotating shafts 5 are collinear; The second rotating shafts 6 are respectively provided on the sides, and the axes of the two second rotating shafts 6 are collinear; the two second driving assemblies 8 are provided along the direction parallel to the axis of the first rotating shaft 5 .

The first drive assembly 7 includes a first coil 71 fixed to the housing 1 and a first magnet 73 fixed to the base 2 . Wherein, the first coil 71 and the first magnetic steel 73 are arranged at intervals along a direction perpendicular to the axis of the first rotating shaft 5 and the axis of the second rotating shaft 6 at the same time. When the first coil 71 is energized, the first Lorentz force F1 generated by the first coil 71 forms a first driving torque T1 to drive the base 2 to rotate around the first shaft 5, and the When the base 2 is rotated, the prism bracket 3 is driven to rotate together, so that the prism 4 can be rotated around the first rotating shaft 5 . Wherein, T1=F1*R1, and R1 is the distance between the first Lorentz force F1 and the axis of the first rotating shaft 5 .

The reflection module further includes a first magnetic conducting plate a which is arranged on the side of the first coil 71 away from the first magnetic steel 73 and is fixed relative to the casing 1 , wherein the first magnetic conducting plate a is and the first magnetic steel 73 to form a first magnetic spring, when the base 2 rotates around the first rotating shaft 5, the first magnetic conductive plate a and the first magnetic steel 73 are relatively dislocated. The generated first restoring force F2 forms a first restoring torque T2 to drive the base 2 to rotate and return. Wherein, T2=F2*R2, and R2 is the distance between the first restoring force F2 and the axis of the first rotating shaft 5 .

It should be noted that, during the process that the first coil 71 is energized to drive the base 2 to rotate around the first rotating shaft 5, due to the first magnetic conductive plate a and the first magnetic steel 73 The relative misalignment will form the first restoring torque T2, and at this time, the total torque T= T1-T2 for the base 2 to rotate around the first rotating shaft 5 .

The second driving assembly 8 includes a second coil 81 fixed to the housing 1 and a second magnet 83 fixed to the prism bracket 3 . Wherein, the second coil 81 and the second magnetic steel 83 are arranged at intervals along a direction parallel to the axis of the first rotating shaft 5 . When the second coil 81 is energized, the second Lorentz force f1 generated by the second coil 81 forms a second driving torque t1 to drive the prism holder 3 to rotate around the second shaft 6 , thereby achieving The prism 4 rotates around the second shaft 6 . Wherein, t1=f1*r1, and r1 is the distance between the second Lorentz force f1 and the axis of the second rotating shaft 6 .

The reflection module further includes a second magnetic conducting plate b disposed on the side of the second coil 81 away from the second magnetic steel 83 and fixed relative to the casing 1 . The second magnetic conductive plate b and the second magnetic steel 83 constitute a second magnetic spring. When the prism bracket 3 rotates around the second rotating shaft 6, the second magnetic conductive plate b and the second magnetic steel 83 rotate. The second restoring force f2 generated by the relative dislocation of the second magnetic steel 83 forms a second restoring torque t2 to drive the prism support 3 to rotate and reset. Wherein, t2=f2*r2, r2 is the distance between the second restoring force f2 and the axis of the second rotating shaft 6 .

It should be noted that, in the process that the second coil 81 is energized to drive the prism support 3 to rotate around the second shaft 6, the second magnetic conductive plate b and the second magnetic steel 83 generate The relative dislocation will form the second restoring torque t2. At this time, the total torque t=(t1-t2)*2 of the prism support 3 rotating around the second rotating shaft 6.

It can be understood that, in other embodiments, only one second driving component 8 may be provided. Correspondingly, the second coil 81 is energized to drive the prism support 3 to revolve around the second rotating shaft 6 During the rotation process, the total torque t=t1-t2 of the prism support 3 rotating around the second shaft 6.

In this embodiment, the first magnetic steel 73 and the second magnetic steel 83 are both quadrupole magnetic steels.

The prism 4 has an incident surface 41, a reflecting surface 43 and an exit surface 45. Light enters the prism 4 from the incident surface 41 and is reflected by the reflecting surface 43, and the light reflected by the reflecting surface 43 exits the prism 4. The emitting surface 45 emits light.

As shown in FIG. 1 and FIG. 7 , the housing 1 includes a base 11 , an upper cover 13 covered on the base 11 and opposite to the exit surface 45 and arranged at intervals, and a cover covered on the base 11 away from the The lower cover 15 on one side of the upper cover 13 has a light outlet 131 penetrating through the upper cover 13 facing the exit surface 45 , and the base 11 facing the incident surface 41 . A light entrance 111 is opened on the top.

The light reaches the incident surface 41 through the light entrance 111, and the light emitted from the exit surface 45 exits the reflection module through the light exit 131; the first shaft 5 is rotatably connected to the base 11 and the base 2, the first coil 71 is relatively fixed to the side of the base 11 away from the light entrance 111, and the second coil 81 is relatively fixed to the base 11 along the first Both sides in the axial direction of the rotating shaft 5 .

A flexible circuit board 10 electrically connected to the first coil 71 and the second coil 81 is fixed on the casing 1 .

The casing 1 is provided with a first opening 1A and a second opening 1B, the flexible circuit board 10 is arranged around the casing 1 and covers the first opening 1A and the second opening 1B, the first coil 71 and the second coil 81 are respectively located in the first opening 1A and the second opening 1B and are fixed to the flexible circuit board 10, the first magnetic conductive plate a and the second magnetic conductive plate b is fixed on the side of the flexible circuit board 10 away from the casing 1 . By arranging the first opening 1A and the second opening 1B on the housing 1 to accommodate the first coil 71 and the second coil 81 respectively, it is beneficial to reduce the overall size of the reflection module.

Wherein, the first opening 1A and the second opening 1B are opened on the base 11 .

As shown in FIG. 6 , the first coil 71 is provided with a first sensor 75 that is electrically connected to the flexible circuit board 10 , and the first sensor 75 is used to measure the base 2 around the first rotation axis 5 Angle of rotation.

In this embodiment, a first reinforcing plate 20 and a second reinforcing plate 30 are fixed on the side of the flexible circuit board 10 away from the casing 1 , and the first reinforcing plate 20 is provided with a first reinforcing plate penetrating through it. A through hole 201, the first magnetic conductive plate a is located in the first through hole 201, the second reinforcement plate 30 is provided with a second through hole 301, and the second magnetic conductive plate b is located in the inside the second through hole 301 . By disposing the first reinforcing plate 20 and the second reinforcing plate 30 , the rigidity of the flexible circuit board 10 can be strengthened to prevent the flexible circuit board 10 from corresponding to the first coil 71 and the second coil 81 . The problem of deformation occurs when the coil interacts with the magnetic steel. At the same time, the first through hole 201 for accommodating the first magnetic conducting plate a is provided on the first reinforcing plate 20 and the second The reinforcing plate 30 is provided with the second through hole 301 for accommodating the second magnetic conducting plate b, which can avoid increasing the thickness of the reflection module along the direction from the first coil 71 to the first magnetic steel 73 . .

It can be understood that, in other embodiments, the first magnetic conductive plate a may also be disposed between the first coil 71 and the flexible circuit board 10, and the first coil 71 passes through the first coil 71. The magnetic conductive plate a is fixed to the flexible circuit board 10 .

In the present embodiment, two first limiting blocks 21 are respectively provided at opposite ends of the base 2 along the axis direction parallel to the second rotating shaft 6 , and the first limiting blocks 21 extend from the The base 2 is formed extending from one side close to the first coil 71 , wherein the base 2 can rotate around the first shaft 5 until the first limiting block 21 is in contact with the housing 1 . That is to say, in the rotation direction of the base 2 around the first rotating shaft 5 , the first limiting block 21 is limited by impacting with the housing 1 . The limiting block 21 is limited by impacting with the upper cover 13 and the lower cover 15 of the housing 1 .

In this embodiment, the rotation angle of the base 2 is α, -2°≤α≤2°. That is to say, the maximum rotation of the base 2 around the first shaft 5 is 2°.

In this embodiment, two second limiting blocks 31 are respectively formed to extend from opposite ends of the prism support 3 along the axis direction parallel to the first rotating shaft 5 , and the prism support 3 can wrap around the The second rotating shaft 6 rotates until the second limiting block 31 is in contact with the base 2 . That is to say, in the rotation direction of the prism bracket 3 around the second rotating shaft 6 , the second limiting block 31 is limited by impacting with the base 2 .

In this embodiment, the rotation angle of the prism support is β, where -2°≤β≤2°. That is to say, the maximum rotation of the prism holder 3 around the second shaft 6 is 2°.

The base 2 is provided with a first accommodating groove 23 , one end of the first rotating shaft 5 passes through the casing 1 and is fixed to the casing 1 , and the other end is inserted into the first accommodating groove 23 . The prism bracket 3 is provided with a second accommodating groove 33 , one end of the second rotating shaft 6 passes through the base 2 and is fixed to the base 2 , and the other end is inserted into the second accommodating groove 33 . One end of the first rotating shaft 5 passes through the base 11 of the housing 1 and is fixed to the base 11 .

It can be understood that, in order for one end of the first rotating shaft 5 to pass through the base 11 and one end of the second rotating shaft 6 to pass through the base 2, the base 11 is provided with a The first through hole 1C through which the rotating shaft 5 passes, and the base 2 is provided with a second through hole 25 through which the second rotating shaft 6 passes.

In this embodiment, the inner wall of the first accommodating groove 23 and the inner wall of the second accommodating groove 33 are both concave spherical surfaces, and the first rotating shaft 5 is inserted into the end of the first accommodating groove 23 and the The ends of the second rotating shaft 6 inserted into the second receiving groove 33 are convex spherical surfaces. In this way, the friction between the inner wall of the first receiving groove 23 and the first rotating shaft 5 can be reduced when the base 2 rotates around the first rotating shaft 5 , and the prism bracket 3 can rotate around the first rotating shaft 5 . When the second rotating shaft 6 rotates, the friction between the inner wall of the second receiving groove 33 and the second rotating shaft 6 occurs.

In this embodiment, the base 2 is further provided with an escape opening 27 at the position facing the second magnetic steel 83 , and the end of the second magnetic steel 83 away from the prism bracket 3 is inserted into the escape opening within 27. In this way, not only the distance between the second magnetic steel 83 and the second coil 81 can be reduced, but also the overall size of the reflection module can be reduced.

As shown in FIG. 6 , a second sensor 85 electrically connected to the flexible circuit board 10 is provided in the second coil 81 , and the second sensor 85 is used to measure the winding of the prism bracket 3 around the second sensor 85 . The angle of rotation of the shaft 6.

The utility model also provides a periscope camera, the periscope camera includes the above-mentioned reflection module.

Compared with the related art, in the reflection module of the present invention, a first magnetic conducting plate a fixed relative to the casing 1 is arranged on the side of the first coil 71 away from the first magnetic steel 73 and a The side of the second coil 81 away from the second magnetic steel 83 is provided with a second magnetic conducting plate b fixed relative to the casing 1 , so that the first magnetic conducting plate a and the first magnetic steel 73 form a first magnetic force The spring, the second magnetic conductive plate b and the second magnetic steel 83 constitute a second magnetic spring, when the first magnetic conductive plate a, the first magnetic steel 73 and the second magnetic conductive plate b After the relative dislocation with the second magnetic steel 83, a restoring force is generated, which can drive the base 2 and the prism support 3 to rotate and reset respectively. In this way, the reflection module can use the magnetic steel that drives the base 2 and the prism support 3 to reset the base 2 and the prism support 3, thereby reducing the use of magnetic steel to reduce even the To avoid the influence of magnetic interference on the rotation and reset of the base and the prism bracket, at the same time, it can also reduce the production cost and simplify the structure of the reflection module; on the other hand, the first magnetic conductive plate a and the second magnetic conductive plate a Plate b can also increase the Lorentz force of the first coil 71 and the second coil 81, respectively.

The above are only the embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these belong to The scope of protection of the utility model.

Claims (13)

1. A reflection module, including the shell that has accommodating space, locate base and prism support in the shell, be fixed in prism, the rotation connection of prism support the shell with the first pivot of base, rotation connection the base with the second pivot, the drive of prism support the base winds first pivot pivoted first drive assembly and drive the prism support winds second pivot pivoted second drive assembly, the axis of first pivot with the axis mutually perpendicular of second pivot, first drive assembly is including relative the fixed first coil of shell and being fixed in the first magnet steel of base, second drive assembly is including relative the fixed second coil of shell and being fixed in the second magnet steel of prism support, its characterized in that, reflection module is still including locating first coil is kept away from first magnet steel one side and relative first magnet steel and magnetic conduction board that the shell is fixed And the second magnetic conduction plate is arranged on one side of the second coil, which is far away from the second magnetic steel and is fixed relative to the shell.

2. The reflection module of claim 1, wherein said first magnetic steel and said second magnetic steel are both quadrupole magnetic steels.

3. The reflection module according to claim 1, wherein a flexible circuit board electrically connected to the first coil and the second coil is fixed to the housing.

4. The reflection module according to claim 3, wherein the housing has a first opening and a second opening, the flexible printed circuit board is disposed around the housing and covers the first opening and the second opening, the first coil and the second coil are respectively disposed in the first opening and the second opening and fixed to the flexible printed circuit board, and the first magnetic conductive plate and the second magnetic conductive plate are fixed to a side of the flexible printed circuit board away from the housing.

5. The reflection module according to claim 4, wherein a first reinforcing plate and a second reinforcing plate are fixedly disposed on a side of the flexible printed circuit board away from the housing, the first reinforcing plate has a first through hole formed therethrough, the first magnetic conductive plate is disposed in the first through hole, the second reinforcing plate has a second through hole formed therethrough, and the second magnetic conductive plate is disposed in the second through hole.

6. The reflective module of claim 1, wherein the base has first stoppers respectively disposed at two opposite ends of the base along a direction parallel to the axis of the second shaft, the first stoppers extending from a side of the base adjacent to the first coil, wherein the base is rotatable around the first shaft until the first stoppers contact the housing.

7. The reflective module of claim 6, wherein the rotation angle of the base is α, -2 ° ≦ α ≦ 2 °.

8. The reflective module of claim 1, wherein a second stop block is formed by extending from each of two opposite ends of the prism support along a direction parallel to the axis of the first rotating shaft, and the prism support can rotate around the second rotating shaft until the second stop block contacts the base.

9. The reflective module of claim 8, wherein the prism support is rotated by an angle β, wherein β is-2 ° or less and 2 ° or less.

10. The reflection module according to claim 1, wherein the base has a first receiving slot, one end of the first shaft passes through the housing and is fixed to the housing, the other end of the first shaft is inserted into the first receiving slot, the prism holder has a second receiving slot, one end of the second shaft passes through the base and is fixed to the base, and the other end of the second shaft is inserted into the second receiving slot.

11. The reflective module of claim 10, wherein the inner walls of the first and second receiving cavities are concave spherical surfaces, and the ends of the first and second shafts inserted into the first and second receiving cavities are convex spherical surfaces.

12. The reflection module according to claim 1, wherein an avoidance opening is further formed in a position of the base facing the second magnetic steel, and one end of the second magnetic steel, which is far away from the prism support, is inserted into the avoidance opening.

13. A periscopic camera comprising the reflective module of any one of claims 1-12.

Images