CN108445598B

CN108445598B - Lens module and optical device

Info

Publication number: CN108445598B
Application number: CN201810076253.5A
Authority: CN
Inventors: 彭伟钧; 何文中
Original assignee: Qisda Optronics Suzhou Co Ltd; Qisda Corp
Current assignee: Qisda Optronics Suzhou Co Ltd; Qisda Corp
Priority date: 2018-01-26
Filing date: 2018-01-26
Publication date: 2021-01-05
Anticipated expiration: 2038-01-26
Also published as: CN108445598A

Abstract

The invention provides a lens module, which comprises a lens, a fixed component for carrying the lens and driving the lens to move relative to a moving component vertical to the optical axis direction of the lens, and a connecting rod component for rotatably connecting the moving component and the fixed component. The simple mechanism design adopted by the invention has the advantages of less required parts, small module volume, simple and quick assembly and contribution to popularization and application in optical devices with various sizes.

Description

Lens module and optical device

Technical Field

The present invention relates to a lens module, and more particularly, to a lens module with a movable lens and an optical device using the same.

Background

In an optical device, for example, a projector, it is necessary to move a lens in a horizontal direction and a vertical direction perpendicular to an optical axis. The current implementation method mainly comprises the following steps: a plurality of base platforms are designed, wherein the first base in the horizontal direction and the first base in the vertical direction are carried on a fixed base, the second base is carried on the first base, two-direction moving coupling structures need to be designed, and the two-direction moving needs to be controlled by two holding rods respectively. The above method requires a large number of mechanical components, and in order to ensure that the lens can be moved smoothly without leakage, the geometric size requirements of each component and assembly are high, which is not favorable for the size reduction and assembly operation of the lens module.

Therefore, there is a need to design a new lens module to overcome the above-mentioned drawbacks.

Disclosure of Invention

The invention aims to provide a simple lens module and an optical device applying the same, which can enable a lens to stably move in any direction in an orthogonal plane of an optical axis of the lens module and can keep the lens not inclined.

To achieve the above object, the present invention provides a lens module, comprising:

the lens is used for adjusting the transmitted light to form an image; the moving component is used for carrying the lens and driving the lens to move relative to the direction vertical to the optical axis of the lens; a fixed member for movably supporting the moving member; and a link member for rotatably connecting the moving member and the fixing member; the first end of the connecting rod component is rotatably connected with the moving component along at least two first rotating shafts, the second end of the connecting rod component is rotatably connected with the fixed component along at least two second rotating shafts, and the direction of each first rotating shaft corresponds to the direction of one second rotating shaft one to one.

Preferably, the method further comprises the following steps: the cover body is used for being fixed with the fixed component, and the cover body and the fixed component form an accommodating cavity so as to limit the moving component to move in the accommodating cavity.

Preferably, the link member further comprises a link for connecting the first end and the second end; the cross section size of the connecting rod perpendicular to the connecting rod direction is smaller than the maximum cross section size of the first end perpendicular to the connecting rod direction, and the cross section size of the connecting rod perpendicular to the connecting rod direction is smaller than the maximum cross section size of the second end perpendicular to the connecting rod direction.

Preferably, the lens module comprises at least three link members.

Preferably, at least part of the end surface of the first end is: the cylindrical surfaces which respectively take the directions of the at least two first rotating shafts as axes are intersected to form a surface; or the at least two first rotating shafts are intersected at a first rotating central point, and the spherical surface takes the first rotating central point as an axis;

at least part of the end surface of the second end is: the cylindrical surfaces which respectively take the directions of the at least two second rotating shafts as axes are intersected to form a surface; or, the at least two second rotation axes intersect at a second rotation center point, and the spherical surface takes the second rotation center point as an axis.

Preferably, the moving member includes a first coupling groove, and the fixing member includes a second coupling groove; at least part of the first end of the connecting rod component is rotatably accommodated in the corresponding first coupling groove, and at least part of the second end of the connecting rod component is rotatably accommodated in the corresponding second coupling groove.

Preferably, the first coupling groove further comprises a first opening having a size smaller than a maximum cross-sectional size of an end surface of the first end to restrict at least a portion of the first end to an inner side of the first opening; and

the second coupling slot further includes a second opening having a dimension smaller than a maximum cross-sectional dimension of an end surface of the second end to confine at least a portion of the second end to an inside of the second opening.

Preferably, the at least one abutting member is used for driving the moving member to abut against the connecting rod member.

Preferably, each of the abutting members includes a first restoring member for urging the moving member away from the cover along the optical axis; and/or each abutting component comprises a second restoring force component which is used for driving the moving component to approach the fixed component along the optical axis direction.

Preferably, when the abutment member comprises the first restoring force member, each of the abutment members further comprises a damping member; the damping member is located at one end of the first restoring force member and abuts against the cover body or the moving member.

To achieve the above object, the present invention provides an optical apparatus comprising: the lens module as described above, wherein the fixing member in the lens module is fixed in the optical device.

Preferably, the optical device includes: the projection module comprises the lens module.

Compared with the prior art, the lens module and the optical device provided by the invention use the connecting rod component as a component which can move relative to the fixed component and limit the moving distance and direction of the moving component carrying the lens, so that the moving component carrying the lens can move smoothly in a plane vertical to the optical axis direction of the lens. The simple mechanism design adopted by the invention has the advantages of less required parts, small module volume, simple and quick assembly and contribution to popularization and application in optical devices with various sizes.

Drawings

FIGS. 1A and 1B are schematic exploded views of a first embodiment of the present invention;

FIG. 1C is an exploded view, partially in cross-section, of a first embodiment of the present invention;

FIG. 1D is an assembled structural view of the first embodiment of the present invention;

FIG. 2A is an exploded view, partially in cross-section, of another embodiment of the present invention;

FIG. 2B is a schematic assembled structure view of another embodiment of the present invention;

FIG. 3A is a schematic partial cross-sectional view of a first embodiment of the present invention in a first state;

FIG. 3B is a schematic partial cross-sectional view of the first embodiment of the present invention in a second state;

FIG. 3C is a schematic view of the linkage member in the first and second states in accordance with the first embodiment of the present invention;

FIG. 4A is a schematic view of the movable range of the spherical end link member according to the first embodiment of the present invention;

fig. 4B and 4C are schematic diagrams illustrating the movable range of the cylindrical surface splicing end link member according to the first embodiment of the present invention.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Certain terms are used throughout the description and following claims to refer to particular components. As one of ordinary skill in the art will appreciate, manufacturers may refer to a component by different names. The present specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to.

Referring to fig. 1A to 4C, a schematic structural diagram of a lens module according to an embodiment of the invention is disclosed.

The lens module can be applied to optical devices requiring optical processing of transmitted light beams, such as projectors, cameras, video cameras, head-up displays (HUDs), head-mounted displays, and the like. The lens module may be fixed in the optical device, or may be movably fixed in the optical device to adjust the optical axis direction and change the direction of the captured or projected image, which is not limited in the present invention. For example, for an optical device (such as a projector, a mobile terminal, etc.) including both a projection module and a camera module, the projection module and the camera module may respectively have the lens module of the present invention to respectively implement corresponding optical path applications.

The lens module includes but is not limited to: a lens 10, a moving member 20, a fixing member 30, and a link member 40.

And a lens 10 for adjusting the transmitted light so that the light taken in or projected through the lens 10 is adjusted to form an image. The focusing lens can be a fixed focusing lens or a focusing lens, and the focusing lens can be used for manual focusing of a user and can also be used for automatic focusing according to the image expression. The lens 10 may include, but is not limited to: a lens barrel 11 for supporting the respective components inside, one or more groups of lenses for modulating light, a stepping mechanism, a motor, a focusing ring, etc. for adjusting the lenses to achieve focusing, an iris, etc. for changing a clear aperture; in addition, the lens 10 may further include an anti-reflection film and an anti-reflection sheet for increasing light transmission efficiency, and a light transmission component for special light processing, such as an infrared light filtering sheet, and the like, which are not described herein again.

Fig. 1A to 1D mainly illustrate a partial structure of the lens 10 related to movement perpendicular to the optical axis of the lens, including a lens barrel 11 and a mounting portion 12 protruding from the outer periphery of the lens barrel 11, where the mounting portion 12 may have a plurality of first mounting holes 121 and/or other structures for fixed coupling, such as a snap-fit structure, the shape of the mounting portion 12 may be matched to the number and position of the first mounting holes 121, the mounting portion 12 illustrated in fig. 1A and 1B is square, and may also be rectangular, regular polygon, circular, and the like, and the invention is not limited thereto. The mounting portion 12 and a part of the structure of the lens barrel 11 are integrally formed, and the two can be fixed by means of pasting, welding, clamping, and the like, which is not limited by the invention. When the first mounting holes 121 are used as the fixing coupling structures, screws 13 or bolts are used to pass through the corresponding first mounting holes 121; preferably, the mounting portion 12 near the first mounting hole 121 is provided with a recessed area to accommodate the head of the screw 13 and to facilitate positioning of the screw 13. The mount 12 of the lens 10 may be disposed at the rear end of the lens barrel 11, or may be disposed at a position on the outer periphery of the lens barrel 11 distant from a movable component (e.g., a focus ring) of the lens barrel 11.

And a moving member 20 for carrying the lens 10 and moving the lens 10 with respect to a direction S perpendicular to an optical axis of the lens 10 (an arbitrary direction in an HV plane perpendicular to the S axis in fig. 1A and 1B). The moving member 20 includes structures for fixed coupling with the mount portion 12 of the lens 10, the number and positions of the fixed coupling structures corresponding to corresponding structures in the mount portion 12 of the lens 10. For example, when the screw 13 is used for locking, the moving member 20 is provided with a plurality of second mounting holes 21 corresponding to the plurality of first mounting holes 121 of the lens 10, the number and position of the second mounting holes 21 correspond to the first mounting holes 121, and the screw 13 passes through one of the first mounting holes 121 and is coupled and fixed with the thread in the corresponding second mounting hole 21. The moving member 20 may also be provided with a recess for receiving at least a portion of the mounting portion 12 secured thereto to facilitate the mutual alignment and coupling securing of the coupling members.

The cross-sectional shape of the moving member 20 perpendicular to the optical axis direction S (or along the HV plane) may be a square (as shown in fig. 1A and 1B, and the cross-sectional cases of the moving member 20 along the diagonal of the square and the plane in which the optical axis direction S lies are illustrated in fig. 1C, 2A, 3A, and 3B), and may also be a rectangle, a circle, another regular polygon, and the like. The center of the moving member 20 includes a second through hole 22, and the second through hole 22 is used for allowing all the transmitted light to pass through; preferably, when the mounting portion 12 of the lens 10 is not disposed at the rear end of the lens barrel 11, that is, a portion of the lens barrel 11 passes through the second through hole 22, the diameter of the second through hole 22 is designed to be larger than the maximum diameter of the portion of the lens barrel 11 passing through the second through hole 22, and preferably, the diameter of the second through hole 22 is designed to be much larger than the maximum diameter of the portion of the lens barrel 11 passing through the second through hole 22, so as to prevent contact collision during the assembling process.

A fixed member 30 for movably supporting the moving member 20. The fixed member 30 includes a groove 31 to accommodate the combined link member 40 and the moving member 20, thereby restricting the range in which the moving member 20 is movable in the HV plane to the groove 31. The sectional shape of the groove 31 along the HV plane may be a square (as shown in fig. 1A and 1B, the sectional case of the fixing member 30 along the plane where the diagonal line of the square and the optical axis direction S are located is illustrated in fig. 1C, 2A, 3A, and 3B), a rectangle, a circle, another regular polygon, or the like, and the rectangle and the regular polygon may also be subjected to chamfering processing; preferably, the shape of the recess 31 matches the shape of the moving member 20, e.g. both are square, rectangular, or circular, etc.; for the convenience of fixing, a square or rectangle subjected to chamfering is preferably selected. The side walls of the groove 31 limit the movable range of the moving member 20, for example, when the groove 31 and the moving member 20 are rectangular in cross-sectional shape along the HV plane, the difference between the horizontal direction H and the vertical direction V limits the movable range of the moving member 20 in the horizontal direction H and the vertical direction V; the size of the groove 31 may also be larger than the movable range of the moving member 20 to prevent the two from being worn due to abutting friction, and at this time, the limitation of the movable range of the moving member 20 may also be realized by the link member 40, which is shown in detail below and will not be described herein again.

The center of the fixed component 30 comprises a third through hole 32, the third through hole 32 is used for allowing all transmitted light rays to pass through, and after the lens 10 is carried by the moving component 20, the lens can move and adjust along the direction in the HV plane relative to the fixed component 30, so that the diameter of the third through hole 32 is designed to be at least slightly larger than the adjustable range of the diameter superposition moving component 20 of the light path, thereby preventing the light path from being shielded, and preventing the defects of dark shadow, uneven image brightness and the like; when the mount 12 of the lens 10 is not disposed at the rear end of the lens barrel 11, that is, a portion of the lens barrel 11 passes through the third through hole 32, the diameter of the third through hole 32 is designed to be at least slightly larger than the adjustable range of the moving member 20 superimposed by the maximum diameter of the portion of the lens barrel 11 passing through the third through hole 32, so as to prevent the inner wall of the groove 31 of the fixing member 30 from colliding with the lens barrel 11 during the movement and adjustment of the moving member 20, thereby causing damage.

The fixing member 30 may further include a corresponding coupling fixing structure to fix the combined lens module into a specific structure of the optical apparatus; as described above, the fixing may be a fixing that is not relatively movable, or may be a fixing that is movably fixed to adjust the optical axis direction of the lens module, thereby changing the direction of the image that is captured or projected.

A link member 40 for rotatably connecting the moving member 20 and the fixed member 30 such that the moving member 20 can move in the HV plane with respect to the fixed member 30. The link member 40 includes a first end 41 and a second end 42, and a link 43 connecting the first end 41 and the second end 42. Wherein the first end 41 is rotatably connected to the moving member 20 and the second end 42 is rotatably connected to the fixed member 30. Rotatable means rotatable with respect to at least two axial directions, such as H direction and V direction, as shown in fig. 4B, 4C; more rotation axis directions are also possible; that is, the first end 41 of the link member 40 is rotatably connected to the moving member 20 along at least two first rotating axes (e.g., H1 axes, V1 axes, or more directions in the H1V1 plane), and the second end 42 of the link member 40 is rotatably connected to the fixed member 30 along at least two second rotating axes (e.g., H2 axes, V2 axes, or more directions in the H2V2 plane), each of the first rotating axes having a direction corresponding to one of the second rotating axes. Preferably, the first rotation axes intersect at the same first rotation center point, and the second rotation axes intersect at the same second rotation center point. The rotation of the first end 41 and the second end 42 can also be spherical rotation of the ends relative to a rotation axis, and the tangential rotation of the end surfaces of the first end 41 and the second end 42 relative to a rotation axis, as shown in fig. 4A, so that the movable member 20 can be adjusted to any angle and distance within its movable range relative to the fixed member 30, and the maximum adjustable distance is limited by the length and the maximum inclination angle of the link 43 in the link member 40; the rotation axis may be fixed in position or may move in a small range in accordance with the rotational position of the link member 40.

Preferably, the moving member 20 may be kept perpendicular to the optical axis direction S (or parallel to the HV plane) at all times during the movement by a combination of the plurality of link members 40 and/or the plurality of abutting members 60.

The number of the link members 40 is at least three, and the three link members 40 are not in the same straight line, so that the moving member 20 is always parallel to the plane HV in the moving process according to the three-point surface fixing principle. The number and corresponding positions of the link members 40 are set according to the shape of the moving member 20 and the shape of the groove 31 in the fixing member 30. In practical applications, for convenience of fixing, the shape of the moving member 20 and the shape of the groove 31 in the fixing member 30 are designed to be square or rectangular, and the areas of the four corners of the moving member 20 and the groove 31 are larger, so that the structure of the coupling link member 40 can be provided, that is, preferably, the number of the link members 40 can be set to 4 (as shown in fig. 1A and 1B, and the combination of the link members 40 along the plane where the diagonal line of the square and the optical axis direction S are located is illustrated in fig. 1C, 2A, 3A, and 3B). More symmetrically positioned link members 40 may be provided and will not be described in detail herein.

All the link members 40 have the same size, and the length of the connecting line 412 between the first rotation axes 411 of the first ends 41 of the two link members 40 is equal to the length of the connecting line 422 between the second rotation axes 421 of the second ends 42, and the

distances

413 and 423 between the rotation axes 411 and 421 of the first ends 41 and the second ends 42 of each link member 40 are also equal, so as to form a parallelogram (as shown in fig. 3A to 3C); no matter the rotation angle of the link members 40, the connecting line 412 is always parallel to the connecting line 422, when the connecting line 412 'of the other two link members 40 is not located on the same straight line with the connecting line 412, and the connecting line 422' is not located on the same straight line with the connecting line 422, the plane formed by the first rotation axes 411 of the first ends 41 and the plane formed by the second rotation axes 421 of the second ends 42 are always kept parallel, so that the bottom surface of the moving member 20 connected with the first ends 41 of the link members 40 and the bottom surface of the groove 31 of the fixed member 30 connected with the second ends 42 are always kept parallel, and the moving member 20 always moves in the plane parallel to the bottom surface of the groove 31 of the fixed member 30.

The length of the vertical connecting line between each first rotating shaft (e.g., H1 shaft) of the first ends 41 of the two link members 40 is equal to the length of the vertical connecting line between one corresponding second rotating shaft (e.g., H2 shaft, H1, H2 are both parallel to the H axis direction) of the second ends 42, and the distances between the legs (in this embodiment, the first rotating shaft 411 of the first end 41 and the second rotating shaft 421 of the second end 42) of the vertical connecting line of the first end 41 and the second end 42 of each link member 40 are also equal, so as to form a parallelogram; when the first ends 41 and the second ends 42 of the link members 40 rotate along the corresponding first rotating shaft H1 direction and the second rotating shaft H2 direction, respectively, a vertical connecting line between each first rotating shaft H1 of the first ends 41 of the two link members 40 and a vertical connecting line between one second rotating shaft H2 corresponding to the second ends 42 are always kept parallel; when the hanging legs (the first rotation axis 411 in this embodiment) at the first rotation axis H1 of the plurality of link members 40 are not in the same straight line, they form a plane, and thus the hanging legs (the second rotation axis 421 in this embodiment) at the second rotation axis H2 also form a plane, so that the bottom surface of the moving member 20 connected to the first end 41 of the link member 40 and the bottom surface of the groove 31 of the fixed member 30 connected to the second end 42 are always kept parallel, and the moving member 20 always moves in a plane parallel to the bottom surface of the groove 31 of the fixed member 30. Preferably, the first rotation axes (e.g., H1 axis and V1 axis) intersect at the same first rotation axis, and the second rotation axes (e.g., H2 axis, V2 axis, and V1 and V2 axis are all parallel to the V axis) intersect at the same second rotation axis, so that the inclination degrees of the respective rotation directions can be kept the same. Or, the rotation axes do not intersect with the same rotation axis, and the inclination angles or maximum strokes in the rotation directions may be different. The first and second ends 41 and 42 of the link member 40 may be provided as spherical surfaces. At least a part of the surface of the end portion may be a spherical surface, and the size of the other portion may be smaller than the size of the spherical surface, or the cross-sectional size of the other portion in the direction of the link 43 may be smaller than the maximum cross-sectional size of the spherical portion, and likewise, the cross-sectional size of the link 43 may be smaller than the maximum cross-sectional size of the spherical portion. For example, the end surfaces at the first end 41 and the second end 42 are semi-spherical caps, the end surfaces extend to the connecting rod 43 from the ends and are conical surfaces, or rotating surfaces with S-shaped curves as generatrices, and so on.

The first end 41 and the second end 42 of the link member 40 may be configured as a surface formed by intersecting and splicing a plurality of cylindrical surfaces, for example, when the first end 41 uses at least two directions (e.g., H direction and V direction) as a first rotating shaft, the cylindrical surfaces CH and CV taking each rotating shaft as an axis intersect to form a solid surface. The first end 41 and the second end 42 of the link member 40 may also have at least a portion of the end surface thereof being the aforementioned mating surface, and the other portion having a dimension smaller than the size of the aforementioned mating surface, or the other portion having a cross-sectional dimension in the direction of the link 43 smaller than the maximum cross-sectional dimension of the mating surface portion.

The moving member 20 includes a plurality of first coupling grooves 23, and the first coupling grooves 23 may receive at least a portion of the first end 41 of the link member 40. The first coupling groove 23 includes a first groove and a first opening, and a surface of the first groove may be a spherical surface having a diameter equal to or slightly larger than a diameter of a spherical portion of the first end 41 of the link member 40 so that the two are smoothly movably abutted; the surface of the first groove may also be a spherical surface, a cylindrical surface with a regular polygon as a base, a trapezoidal cylindrical surface, etc., or may also be a partial circumferential surface of the above surface, or may also be a combination of the above surfaces, which is not limited by the present invention. When the first and second ends 41 and 42 of the link member 40 include the above-described cylindrical split surfaces, it is preferable that the surface shape of the first groove of the first coupling groove 23 is set to be the same as or slightly larger than the split surface in the end surface of the first end 41, thereby achieving the limitation of the rotatable direction by virtue of the coupling of the first coupling groove 23 with the first end 41; the surface shape of the first slot of the first coupling slot 23 may also be configured as a cylindrical surface or a trapezoidal surface, wherein the sides of the bottom of the cylindrical surface and the trapezoidal surface correspond to the diameter of the corresponding cylindrical surface in the splicing surface (corresponding to being equal or slightly larger), may also be portions of the above-mentioned surfaces, or a combination of the above-mentioned surfaces, and the invention is not limited thereto.

Preferably, the size of the first opening is smaller than the maximum cross-sectional size of the end surface of the first end 41, or is also slightly larger than the size of a circle formed by the connecting portion of the link 43 and the first end 41 when the link 43 rotates at the maximum inclination angle for one circle. For convenience of installation, the first opening may be flexibly deformed or elastic, and the first opening is movably limited in the groove inside the first opening after being inserted into the corresponding portion of the first end 41, and at this time, since the first opening limits the rotation of the link member 40, the groove inside the first opening may or may not be the surface shape of the first groove; even further, the surface of the first groove inside the first opening may not be in contact with the first end 41.

The fixing member 30 includes a plurality of second coupling grooves 33, and the second coupling grooves 33 may receive at least portions of the second ends 42 of the link members 40. The second coupling groove 33 includes a second groove and a second opening, and the shape, size and coupling relationship of the second coupling groove 33 and the first end 41 may be similar to the first coupling groove 23 of the moving member 20, and will not be described in detail herein. When the first and second ends 41 and 42 of the link member 40 include the above-described cylindrical coupling surfaces, the second end 42 of the link member 40 and the second coupling groove 33 of the fixed member 30 may be similarly disposed corresponding to the first end 41 and the first coupling groove 23 of the moving member 20, or only one set thereof (for example, the second end 42 and the second coupling groove 33 are similarly disposed, but the first end 41 and the first coupling groove 23 are not differently disposed) may be disposed, thereby limiting the inclinable direction of the link member 40 depending on the direction of at least one set thereof.

The first end 41 and the second end 42 of the link member 40 may be equal in size, and the first coupling groove 23 and the second coupling groove 33 may be designed to have the same size and structure, or different sizes and structures, and the specific size, structure and coupling relationship may be any one of those described above, and will not be described herein again.

The first end 41 and the second end 42 of the link member 40 may have different dimensions, for example, the maximum cross-sectional dimension of the first end 41 perpendicular to the link 43 is smaller than the maximum cross-sectional dimension of the second end 42 perpendicular to the link 43, the first coupling slot 23 and the second coupling slot 33 may be designed to have dimensions corresponding to the first end 41 and the second end 42, respectively, and the structures thereof may be the same or different, and the specific dimensions, structures and coupling relationships may be any of those described above, and will not be described herein again. Furthermore, the second opening may be provided with a dimension larger than the maximum cross-sectional dimension of the first end 41 perpendicular to the link 43 and smaller than the maximum cross-sectional dimension of the second end 42 perpendicular to the link 43, such that a third opening may be provided at the other side of the second coupling groove 33 with respect to the second opening through which the first end 41 of the link member 40 and the link 43 partially pass, and the link 42 may be at least partially restricted by the second opening in the second groove at the inner side; the first end 41 is then received in the first coupling slot 23 by any of the methods described above. The third opening may be closed by an additional attachment which may be fixed by gluing, locking, welding or the like or embedded in the surface of the fixing member 30 in which the third opening is located. In addition, the size of the first opening is larger than the largest cross-sectional dimension of the second end 42 perpendicular to the connecting rod 43 and smaller than the largest cross-sectional dimension of the first end 41 perpendicular to the connecting rod 43, and the insertion and assembly can be performed from one side of the moving member 20.

As shown in fig. 3C, assuming that the position of the shaft center 421 of the second end 42 of the link member 40 is fixed relative to the fixed member 30, the movable range of the position of the shaft center 411 of the first end 41 is any position in the spherical cap 44, and the maximum range 45 of the inclination angle of the connecting line between the shaft center 411 and the shaft center 421 (or the link 43) is shown in the figure, and the maximum range 45 of the inclination angle is limited by the size of the first end 41 and the second end 42, the sectional size of the link 43, and the shape and size of the first coupling groove 23 and the second coupling groove 33. When the surfaces of the first and/or second grooves are formed by multi-directional cylindrical splicing, for example, the movable range of the first rotation axis H1 axis or H2 axis of the first end 41 is an arc 44 ' or 44 ' of a circle with the second rotation axis (e.g., H2 or V2 axis) of the second end 42 as the rotation axis, respectively, and the maximum range of the inclination angle 45 ' or 45 "is limited by the shape and size of the corresponding end surface cylindrical surface in the first end 41 and the second end 42, the cross-sectional size of the link 43, and the shape and size of the first and

second coupling grooves

23 and 33.

In addition, the lens module may further include a cover 50 fixed to the fixing member 30 and forming a receiving cavity to limit the moving member 20 therein. The cover 50 and the fixed member 30 are located on different sides of the moving member 20, for example, fig. 1C and 2A illustrate partial sectional views of the cover and the fixed member on different sides, respectively; the cover 50 and the fixing member 30 may be coupled by a screw 53, or by clamping, adhering, welding, etc.

The cover 50 includes a cover mounting portion 51 and a fifth through hole 52. The cover mounting portion 51 may be the third mounting hole 511, or may be other structures for fixed coupling, such as a snap structure, or a combination of multiple fixed coupling structures. At this time, the corresponding position of the fixing member 30 has a corresponding fixing coupling structure, for example, the fourth mounting hole 34. For example, when the third mounting hole 511 is employed as the fixing coupling structure, a screw 53 or a bolt is employed to pass through the corresponding third mounting hole 511 and to be fixed by screw coupling with the corresponding fourth mounting hole 34 of the fixing member 30.

The cover 50 includes a fifth through hole 52, and when the lens barrel 11 is assembled, a portion of the lens barrel 11 can pass through the fifth through hole 52, so that the size of the fifth through hole 52 is designed to be at least slightly larger than the adjustable range of the maximum diameter of the portion of the lens barrel 11 passing through the fifth through hole 52 and overlapping the movable member 20, so as to prevent the cover 50 from contacting and colliding with the lens barrel 11 during the movement and adjustment of the movable member 20, and causing damage.

Preferably, the lens module may further include an abutment member 60 for urging the moving member 20 to abut against the link member 40. The structures and couplings of the link member 40 and the first and

second coupling grooves

23 and 33 may be as above, or the sizes of the first and second openings of the first and

second coupling grooves

23 and 33 may be other sizes, for example, the surfaces of the first and

second coupling grooves

23 and 33 may be semi-spherical surfaces, or spherical caps with a height smaller than the diameter of a sphere, square cylindrical surfaces, or cylindrical surfaces with a regular polygon as a base, trapezoidal cylindrical surfaces, drum surfaces, etc.

Preferably, the number of the abutment members 60 includes at least three, and fig. 1A and 1B show a case where four abutment members 60 are applied, and the present invention is not limited thereto. For example, when the lens module has one link member 40, four abutting members 60 are distributed around the one link member 40; for another example, when the lens module has four link members 40, the four link members 40 are distributed around the one abutment member 60, and so on.

The abutting member 60 may include a first abutting member 61 disposed between the cover 50 and the moving member 20, the first abutting member 61 includes a first restoring force member 611 for urging the moving member 20 away from the cover 50 along the optical axis direction S, the first restoring force member 611 may be a force generated by restoring an original shape or size based on (but not limited to) elasticity, air pressure, hydraulic pressure, electromagnetic force, magnetic repulsive force, and the like, in this embodiment, the first restoring force member 611 is a spring, and preferably, one end of the spring is inserted into the column hole 24 of the moving member 20 or the column hole of the cover 50, so that the moving direction thereof is limited to the optical axis direction. Preferably, a damping member 612 is disposed at a free end (e.g., an end not restricted in the moving direction) of the first restoring force member 611 to abut against the cover 50 or the moving member 20, so as to keep the moving member 20 and the cover 50 relatively stationary without being displaced by the self-weight of the moving member 20 carrying the lens 10 when the lens 10 carried by the moving member 20 is adjusted to a proper position.

The abutting member 60 may further include a second abutting member disposed between the moving member 20 and the fixed member 30, the second abutting member including a second restoring force member for urging the moving member 20 to approach the fixed member 30 in the optical axis direction S, the second restoring force member may be based on (but not limited to) a force generated by elasticity, air pressure, hydraulic pressure, electromagnetic force, magnetic attraction force, or the like to restore an original shape or size, such as a magnetic sheet disposed opposite to the same pole.

The invention provides a lens module and an optical apparatus, which uses a link member as a moving member for carrying a lens, which is movable relative to a fixed member, and a distance limiting part, thereby enabling the moving member for carrying the lens to move smoothly in any direction in a plane perpendicular to the optical axis direction of the lens. The lens is ensured not to be inclined by the combination of a plurality of link members and/or a plurality of abutting members. The simple mechanism design adopted by the invention has the advantages of less required parts, small module volume, simple and quick assembly and contribution to popularization and application in optical devices with various sizes.

The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention, and that the embodiments and features of the embodiments may be combined without conflict. All changes and modifications that come within the spirit and scope of the invention are desired to be protected.

Claims

1. A lens module, comprising:

the lens is used for adjusting the transmitted light to form an image;

the moving component is used for carrying the lens and driving the lens to move relative to the direction vertical to the optical axis of the lens;

a fixed member for movably supporting the moving member; and

a link member for rotatably connecting the moving member and the fixing member;

the first end of the connecting rod component is rotatably connected with the moving component along at least two first rotating shafts, the second end of the connecting rod component is rotatably connected with the fixed component along at least two second rotating shafts, and the direction of each first rotating shaft corresponds to the direction of one second rotating shaft one to one.

2. The lens module as recited in claim 1, further comprising: the cover body is used for being fixed with the fixed component, and the cover body and the fixed component form an accommodating cavity so as to limit the moving component to move in the accommodating cavity.

3. The lens module as recited in claim 1, wherein: the link member further includes a link for connecting the first end and the second end; the cross section size of the connecting rod perpendicular to the connecting rod direction is smaller than the maximum cross section size of the first end perpendicular to the connecting rod direction, and the cross section size of the connecting rod perpendicular to the connecting rod direction is smaller than the maximum cross section size of the second end perpendicular to the connecting rod direction.

4. The lens module as recited in claim 1, wherein: the lens module at least comprises three connecting rod components.

5. The lens module as recited in claim 1, wherein:

at least part of the end surface of the first end is: the cylindrical surfaces which respectively take the directions of the at least two first rotating shafts as axes are intersected to form a surface; or the at least two first rotating shafts are intersected at a first rotating central point, and the spherical surface takes the first rotating central point as an axis;

6. The lens module as recited in claim 5, wherein: the moving member includes a first coupling groove, and the fixing member includes a second coupling groove; at least part of the first end of the connecting rod component is rotatably accommodated in the corresponding first coupling groove, and at least part of the second end of the connecting rod component is rotatably accommodated in the corresponding second coupling groove.

7. The lens module as recited in claim 6, wherein:

the first coupling slot further comprises a first opening having a dimension smaller than a maximum cross-sectional dimension of an end surface of the first end to confine at least a portion of the first end inside the first opening; and

8. The lens module as recited in claim 1, wherein: at least one abutting component for driving the moving component to abut against the connecting rod component.

9. The lens module as recited in claim 8, wherein: the lens module further includes a cover body for fixing with the fixing member, the cover body and the fixing member forming a receiving cavity for limiting the moving member to move in the receiving cavity, each of the abutting members includes a first restoring force member for driving the moving member to move away from the cover body along the optical axis direction; and/or the presence of a gas in the gas,

each of the abutting members includes a second restoring member for urging the moving member to approach the fixed member in the optical axis direction.

10. The lens module as recited in claim 9, wherein: when the abutting component comprises the first restoring force component, each abutting component also comprises a damping component; the damping member is located at one end of the first restoring force member and abuts against the cover body or the moving member.

11. An optical device, comprising: a lens module as recited in any one of claims 1-10, wherein the securing member in the lens module is secured in the optical device.

12. The optical device of claim 11, wherein the optical device comprises: the projection module comprises the lens module.