CN210042053U - Adjustment device and projection device - Google Patents

Abstract

An adjusting device is used for adjusting an optical element. The adjusting device comprises a bearing seat, a base, a connecting column and a fixing element. The bearing seat is used for bearing the optical element. The bearing seat is provided with a first surface and a second surface which are opposite. The first surface protrudes to form a first cambered surface, and the first cambered surface is provided with a first connecting hole which is communicated with the first surface and the second surface. The base is supported against the first cambered surface. The base has a third surface and a fourth surface which are opposite. The third surface is protruded to form a second cambered surface, the second cambered surface is provided with a through hole communicated with the third surface and the fourth surface, and the aperture of the through hole is larger than the outer diameter of the connecting column. The connecting column moves in the through hole by moving the fixing element. The angle of the bearing seat is adjusted by the position change of the connecting column. The utility model discloses still provide the projection arrangement who contains above-mentioned adjusting device. The utility model discloses an adjustable optical element of adjusting device and projection arrangement promotes the optics quality, and the structure is firm simple and can reduce occupation space.

Description

Adjustment device and projection device

technical field

The utility model relates to an adjustment device and a projection device, and in particular, to an adjustment device for adjusting an optical element and a projection device using the adjustment device.

Background technique

A projection device is a display device used to generate large-scale images. With the evolution and innovation of science and technology, it is constantly improving. The imaging principle of the projection device is to convert the illumination beam generated by the illumination system into an image beam through a light valve, and then project the image beam to the projection target (such as a screen or a wall) through a projection lens to form a projection image. Usually, manufacturers of projection devices have adjusted the internal optical components to accurate positions and angles when the products leave the factory, so as to achieve a good projection effect. However, in the process of use, the optical element will inevitably have positional deviation and angle deviation. Therefore, an adjustment mechanism with both easy adjustment and stability must be provided for subsequent maintenance and adjustment.

In the prior art, the adjustment is usually carried out in three ways, such as arranging the rotating support of the adjustment seat, arranging multiple sets of adjustment seats, and arranging adjustment screws for screwing the adjustment seat to the outside of the side wall. However, in the above method of arranging the rotating support of the adjustment base, it is difficult to achieve the effect of fixing the entire lens structure only by the support structure, and additional fixing parts are needed to fix the adjustment base, so an additional jig is required for adjustment. However, in the process of using the jig to fix the adjustment seat with the screw, the adjustment seat will be slightly offset, so that the light output efficiency is not as good as expected. In addition, due to physical limitations, it is not possible to set the pillars as the rotation axis in both directions at the same time. Only the pillars can be set as the rotation axis in one direction, and the frame of the adjustment seat is used as the rotation axis in the other direction. Therefore, the rotation center point Not on the lens, causing the center of the lens to shift when rotating, reducing the image quality. Furthermore, the periphery of the optical element is covered by the edge structure of the adjustment seat, not only the light will be blocked by the edge structure, but also the arrangement of other components is restricted. In addition, in the above-mentioned method of arranging multiple sets of adjustment seats and arranging adjustment screws for screwing the adjustment seats to the outside of the side wall, there are still problems such as large space requirement and complicated structure, resulting in high cost. Moreover, the above-mentioned method still does not solve the problem that the edge structure of the adjusting seat covers the surrounding of the lens.

The "Background Art" paragraph is only used to help understand the content of the present invention, so the content disclosed in the "Background Art" paragraph may contain some known technologies that are not known to those skilled in the art. The content disclosed in the "Background Art" paragraph does not represent the content or the problem to be solved by one or more embodiments of the present invention, and has been known or recognized by those skilled in the art before the present invention is applied for. .

Utility model content

The utility model provides an adjustment device and a projection device, which can adjust the optical element to improve the optical quality, and have a stable and simple structure and can reduce the occupied space.

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

To achieve one or part or all of the above objectives or other objectives, an embodiment of the present invention provides an adjustment device for adjusting an optical element. The adjusting device includes a bearing seat, a base, a connecting column and a fixing element. The carrier is used to carry the optical element. The carrier has opposite first and second surfaces. The first surface is away from the optical element, and the first surface is protruded to form a first arc surface. The first arc surface has a first connecting hole that communicates with the first surface and the second surface. The base is supported on the first arc surface. The base has opposing third and fourth surfaces. The third surface is away from the bearing seat, and the third surface is protruded to form a second arc surface. The second arc surface has a through hole communicating with the third surface and the fourth surface. The connecting column is passed through the through hole. One end of the connecting column is fixedly connected to the first connecting hole. The fixing element has an abutting portion and a second connecting hole. The other end of the connecting column is fixedly connected to the second connecting hole, wherein the diameter of the through hole is larger than the outer diameter of the connecting column. The connecting post is moved within the through hole by moving the fixing element. The angle of the bearing seat is adjusted by changing the position of the connecting column.

To achieve one or part or all of the above purposes or other purposes, another embodiment of the present invention provides a projection device including an illumination system and an opto-mechanical module. The lighting system is used to provide the lighting beam. The lighting system includes optical elements and adjustment means. The adjustment device includes a carrier, a base, a connecting column and a fixing element. The carrier is used to carry the optical element. The carrier has opposite first and second surfaces. The first surface is away from the optical element, and the first surface is protruded to form a first arc surface. The first arc surface has a first connecting hole that communicates with the first surface and the second surface. The base is supported on the first arc surface. The base has opposing third and fourth surfaces. The third surface is away from the bearing seat, and the third surface is protruded to form a second arc surface. The second arc surface has a through hole communicating with the third surface and the fourth surface. The connecting column is passed through the through hole. One end of the connecting column is fixedly connected to the first connecting hole. The fixing element has an abutting portion and a second connecting hole. The other end of the connecting column is fixedly connected to the second connecting hole. The optical-mechanical module is arranged on the transmission path of the illumination beam, and is used for converting the illumination beam into an image beam. Wherein, the diameter of the through hole is larger than the outer diameter of the connecting column. The connecting post is moved within the through hole by moving the fixing element. The angle of the bearing seat is adjusted by changing the position of the connecting column.

Based on the above, the embodiments of the present invention have at least one of the following advantages or effects. In the adjusting device and the projection device of the present invention, the bearing seat of the adjusting device can partially fit on the base and adjust the angle by moving or rotating the connecting column. Therefore, the adjustment device and the projection device of the present invention can adjust the optical element to improve the optical quality, and have a stable and simple structure and can reduce the occupied space.

In order to make the above-mentioned features and advantages of the present utility model more obvious and easy to understand, the following examples are given and described in detail in conjunction with the accompanying drawings as follows.

Description of drawings

FIG. 1 is a schematic block diagram of a projection device according to an embodiment of the present invention.

FIG. 2A and FIG. 2B are respectively three-dimensional schematic diagrams of an adjustment device according to an embodiment of the present invention from different viewing angles.

FIG. 3 is a schematic cross-sectional view of the adjustment device of FIGS. 2A and 2B .

4A and 4B are exploded perspective views of the adjusting device of FIGS. 2A and 2B from different viewing angles, respectively.

Detailed ways

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or rear, etc., are only referring to the directions of the drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

FIG. 1 is a schematic block diagram of a projection device according to an embodiment of the present invention. Please refer to Figure 1. An embodiment of the present invention provides a projection device 10 . The projection device 10 is, for example, a projector, but the present invention is not limited thereto. The projection device 10 includes an illumination system 20 and an opto-mechanical module 30 . The illumination system 20 is used to provide the illumination light beam L1 to the optomechanical module 30, and the optomechanical module 30 is used to receive the illumination light beam L1 to generate the image light beam L2, and then project it to a projection target, such as a screen or a wall.

Specifically, in this embodiment, the optical-mechanical module 30 includes, for example, a light homogenizing element, at least one light valve, a projection lens, and a plurality of optical components, but the present invention is not limited thereto. The uniform light element is arranged on the transmission path of the illumination beam L1, and is used to adjust the spot shape of the illumination beam L1, so that the spot shape of the illumination beam L1 can match the shape of the working area of the light valve (for example: a rectangle), and make the spot shape everywhere. With a uniform or close light intensity, the light intensity of the illumination beam L1 is uniform. In this embodiment, the homogenizing element is, for example, an integrating cylinder, but in other embodiments, the homogenizing element can also be an optical element of other suitable types, such as a lens array (fly eye lens array). The new type is not limited to this.

The light valve is, for example, a reflective light modulator such as a Liquid Crystal On Silicon panel (LCoS panel) and a Digital Micro-mirror Device (DMD). In some embodiments, the light valve may also be a Transparent Liquid Crystal Panel, an Electro-Optical Modulator, a Magneto-Optic Modulator, and an Acousto-Optic Modulator. (Acousto-Optic Modulator, AOM) and other transmissive optical modulators. The utility model does not limit the type and type of the light valve. The detailed steps and implementation of the method for the light valve to convert the illumination light beam L1 to provide the image light beam L2 can be adequately taught, suggested and implemented by the general knowledge in the technical field, and thus will not be repeated here.

The projection lens includes, for example, a combination of one or more optical lenses having dioptric powers, such as various combinations of non-planar lenses such as biconcave lenses, biconvex lenses, meniscus lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. In one embodiment, the projection lens may also include a flat optical lens, which projects the image light beam L2 from the above-mentioned light valve to the projection target in a reflective or penetrating manner. The present invention does not limit the type and type of the projection lens.

The plurality of optical components are, for example, lenses, mirrors, beam splitters, plane lenses, filters or refractive prisms, etc., but the present invention is not limited thereto. These optical components are used for guiding the illumination light beam L1 emitted by the illumination system 20 to the light valve, or for guiding the image light beam L2 converted by the light valve to the projection lens.

The lighting system 20 includes an optical element 50 and an adjustment device 100 . Specifically, in this embodiment, the lighting system 20 includes a light source 40 , an optical element 50 , an adjustment device 100 and a plurality of other optical components. The light source 40 provides a light beam, and the light beam is transmitted through the optical element 50, and then passes through other optical components such as a wavelength conversion element or a filter element, thereby forming the illumination light beam L1. The light source 40 is, for example, a Laser Diode (LD), a Light Emitting Diode (LED), or an array (array or bank) or a group (group) formed by one of the above two. The present invention does not limited to this. The optical element 50 is, for example, a mirror, which can be used to guide the beam path, but the present invention is not limited thereto. The optical element 50 described below will take a mirror as an example.

FIG. 2A and FIG. 2B are respectively three-dimensional schematic diagrams of the adjusting device 100 according to an embodiment of the present invention from different viewing angles. Please refer to FIG. 1 to FIG. 2B. In this embodiment, the adjusting device 100 is used to carry the optical element 50 and adjust the angle of the optical element 50 . The adjusting device 100 includes a bearing base 110 , a base 120 , a connecting column 130 and a fixing element 140 . The carrier 110 is used to carry the optical element 50 , and the user is used to move or rotate the fixing element 140 to adjust the position of the optical element 50 in space.

FIG. 3 is a schematic cross-sectional view of the adjustment device 100 of FIGS. 2A and 2B . 4A and 4B are exploded perspective views of the adjusting device 100 of FIGS. 2A and 2B from different viewing angles, respectively. Please refer to FIGS. 2A to 4B . In detail, the carrier 110 carries the optical element 50 . The carrier 110 has a first surface S1 and a second surface S2 opposite to each other, and the first surface S1 is away from the optical element 50 . In other words, the optical element 50 is carried on the second surface S2 of the carrier 110 , and the side of the optical element 50 facing away from the second surface S2 is used to receive and reflect the light beam.

In this embodiment, the carrier 110 includes a plurality of clamping structures 112 for clamping the optical element 50 . Specifically, the carrier 110 has four side surfaces B1 connecting the first surface S1 and the second surface S2, and the plurality of clamping structures 112 are respectively located on at least two side surfaces B1 of the four side surfaces B1 of the carrier 110, and At least one of the four sides B1 is not provided with the clamping structure 112 . In other words, in this embodiment, the optical element 50 can be fixed on the support base 110 by two or three clamping structures 112 . For example, as shown in FIG. 4A , viewed from the perspective of FIG. 4A , the upper, left and lower side surfaces B1 of the bearing base 110 are respectively provided with the clamping structures 112 , but the right side B1 is not provided with the clamping structures 112 . Clamping structure 112; and as shown in FIG. 4B, viewed from the perspective of FIG. 4B, the side B1 of the upper, right and lower sides of the bearing base 110 is provided with the clamping structure 112, while the side B1 of the left side is not provided There is a clamping structure 112 . In this way, at least one of the four sides B1 is not provided with the clamping structure 112 , which will reduce the overall volume of the adjustment device 100 , and can prevent the light beam from being clamped by the edge of the carrier 110 when transmitted to the optical element 50 . The structure 112 blocks and affects the optical quality.

The first surface S1 of the carrier 110 protrudes to form a first arc surface A1 for abutting against the base 120 , so that there is a gap between the first surface S1 and the surface of the base 120 , as shown in FIG. 3 . Therefore, the bearing seat 110 can be rotated by the first arc surface A1 abutting on the base 120 , and the interval between the first surface S1 and the base 120 is the maximum rotation range of the bearing seat 110 . In addition, in this embodiment, the first arc surface A1 is a spherical surface, which can optimize the rotation effect of the bearing seat 110 , but the present invention is not limited to this.

The base 120 is supported on the first arc surface A1 of the bearing base 110 . The base 120 has an opposite third surface S3 and a fourth surface S4 , wherein the third surface S3 is away from the bearing base 110 . In other words, the bearing seat 110 bears against the fourth surface S4 of the base 120 . The third surface S3 of the base 120 protrudes to form a second arc surface A2 for abutting the fixing element 140 , so that the fixing element 140 can slide snugly on the surface of the second arc surface A2 , as shown in FIG. 3 . In this embodiment, the second arc surface A2 is a spherical surface, and when the bearing base 110 and the base 120 are in parallel contact with each other, the first arc surface A1 and the second arc surface A2 are concentric circles with the connecting column 130 as the center of symmetry , the rotation effect of the bearing seat 110 can be optimized, but the present invention is not limited to this. It is worth mentioning that the base 120 can be locked on the housing of the projection device 10 . Alternatively, the base 120 may be a part of the housing of the projection device 10 , and the present invention is not limited thereto.

The first arc surface A1 of the bearing seat 110 has a first connecting hole H1 that communicates with the first surface S1 and the second surface S2. The second arc surface A2 of the base 120 has a through hole T that communicates with the third surface S3 and the fourth surface S4. The fixing element 140 has an abutting portion 142 and a second connecting hole H2 , wherein the first connecting hole H1 of the bearing seat 110 and the second connecting hole H2 of the fixing element 140 have the same aperture size, and the through hole T of the base 120 has the same aperture size. It is larger than the aperture size of the first connection hole H1 and the second connection hole H2.

The connecting post 130 penetrates through the through hole T of the base 120 , one end of which is fixed to the first connecting hole H1 of the bearing base 110 , and the other end of which is fixed to the second connecting hole H2 of the fixing element 140 . The outer diameter of the connection post 130 is adapted to the aperture size of the first connection hole H1 and the second connection hole H2 , but the aperture size of the through hole T is larger than the outer diameter of the connection post 130 . In this embodiment, the connecting column 130 is a threaded column, the fixing element 140 is a stepped nut, and the hole wall of the first connecting hole H1 has threads. In other words, both ends of the connecting column 130 are locked into the first connecting hole H1 of the bearing base 110 and the second connecting hole H2 of the fixing element 140 , respectively. Since the size of the middle portion of the connecting column 130 between the two ends is smaller than the diameter of the through hole T of the base 120 , the connecting column 130 can move in the through hole T of the base 120 , such as rotation or displacement.

In addition, in this embodiment, the adjusting device 100 further includes an elastic element 150 , such as a spring, and the elastic element 150 abuts between the abutting portion 142 of the fixing element 140 and the second arc surface A2 of the base 120 . In this way, sufficient supporting force can be provided and the influence of the backlash between the connecting column 130 and the fixing element 140 can be reduced.

Specifically, when the angle adjustment of the optical element 50 is desired, the user can manipulate the fixing element 140 to rotate or slide on the second arc surface A2 of the base 120 . Through the above operations, since one end of the connecting column 130 is connected to the fixing element 140 , the connecting column 130 can rotate or move in the through hole T of the base 120 by moving the fixing element 140 . Further, since the other end of the connecting column 130 is connected to the bearing base 110 , the rotation or movement of the connecting column 130 can drive the angle of the bearing base 110 to be adjusted by changing the position of the connecting column 130 . More specifically, when the bearing base 110 is in contact with the base 120 , the first arc surface A1 of the bearing base 110 and the through hole T of the base 120 form a ball-and-socket structure, so that the base 120 can partially fit on the bearing base 110 move on the first arc surface A1. In this way, when the user uses the adjustment device 100 , the position of the optical element can be adjusted through a simple mechanism operation to improve the optical quality, and the adjustment device 100 has a stable and simple structure and can reduce the occupied space.

In this embodiment, the first surface S1 of the bearing seat 110 has a plurality of protrusions P, and the lengths of these protrusions P are smaller than the maximum distance when the bearing seat 110 is in parallel contact with the base 120 (ie, the first maximum separation between surface S1 and base 120). The protruding portions P are used to abut the base 120 when the bearing seat 110 rotates, so as to limit the adjustment stroke of the bearing seat 110 . In this way, the maximum rotation range of the bearing seat 110 can be designed by adjusting the height of the protruding portion P, so that the bearing seat 110 will not be adjusted excessively. In this embodiment, the protrusions P are symmetrically arranged in pairs with the connecting post 130 as the center of symmetry, but the present invention is not limited thereto, and the shape, length and arrangement of the protrusions P can be changed according to requirements. In this embodiment, the angle adjustment range of the bearing seat 110 in any direction is less than or equal to 3 degrees, but the present invention is not limited to this.

In this embodiment, the bearing base 110 further includes at least one limiting member 114 , and the base 120 includes at least one limiting groove 122 , and the limiting member 114 and the limiting groove 122 cooperate with each other. Specifically, the limiting member 114 is at least partially located in the limiting groove 122 . Specifically, on the four side surfaces B1 of the bearing base 110 , the limiting member 114 is disposed on at least one of the four side surfaces B1 . In addition, the base 120 has four side surfaces B2 connecting the third surface S3 and the fourth surface S4. On the four side surfaces B2 of the base 120, the limiting groove 122 is disposed on at least one of the four side surfaces B2. For example, in this embodiment, the limiting members 114 are disposed on two opposite sides B1 of the bearing base 110 , and the limiting grooves 122 are disposed on two opposite sides B2 of the base 120 corresponding to the positions of the two opposite sides B1 superior. In other words, if the number of the limiting members 114 of the carrier 110 is two, they are located on any two opposite sides B1 of the four side surfaces B1 of the carrier 110, and the limiting grooves 122 of the base 120 The number of B is also two, and they are respectively located on two opposite side surfaces B2 of the four side surfaces B2 of the base 120 corresponding to the two limiting members 114 . Therefore, when the angle of the bearing seat 110 is adjusted, the bearing seat 110 can cooperate with the limiting groove 122 corresponding to the base 120 through the limiting member 114 to avoid rotation in a certain direction. In other words, in different embodiments, the limiting member 114 and the limiting groove 122 may be arranged in different directions according to the adjustment requirements of the optical element 50 , thereby limiting the adjustable dimension of the optical element 50 . Not limited to this.

To sum up, the embodiments of the present invention have at least one of the following advantages or effects. In the adjusting device and the projection device of the present invention, the bearing seat of the adjusting device can partially fit on the base and adjust the angle by moving or rotating the connecting column. Therefore, the adjustment device and the projection device of the present invention can adjust the optical element to improve the optical quality, and have a stable and simple structure and can reduce the occupied space.

Only the above are only the preferred embodiments of the present invention, and the scope of implementation of the present invention cannot be limited by this, that is, all simple equivalent changes and Modifications are still within the scope of the utility model patent. In addition, it is not necessary for any embodiment or claim of the present invention to achieve all of the objects or advantages or features disclosed in the present invention. In addition, the abstract and the name of the utility model are only used to assist in the retrieval of patent documents, and are not used to limit the scope of rights of the present utility model. In addition, the terms such as "first" and "second" mentioned in this specification or the claims are only used to name the elements or to distinguish different embodiments or ranges, and are not used to limit the number of elements. upper or lower limit.

Description of reference numbers:

10: Projection device

20: Lighting system

30: Opto-mechanical module

40: Light source

50: Optical Components

100: Adjustment device

110: Bearing seat

112: Clamping structure

114: Limiter

120: Pedestal

122: Limit slot

130: connecting column

140: Fixed element

142: Abutment

150: Elastic element

A1: The first arc

A2: The second arc

B1, B2: side

H1: The first connection hole

H2: Second connection hole

P: Protrusion

S1: first surface

S2: Second surface

S3: Third surface

S4: Fourth surface

T: Through hole

L1: Lighting beam

L2: Image beam.

Claims (20)

1. An adjusting device for adjusting an optical element, the adjusting device comprising a bearing seat, a base, a connecting column and a fixing element, wherein:

the bearing seat is used for bearing the optical element and is provided with a first surface and a second surface which are opposite, the first surface is far away from the optical element, the first surface protrudes to form a first cambered surface, and the first cambered surface is provided with a first connecting hole which is communicated with the first surface and the second surface;

the base is supported on the first cambered surface and provided with a third surface and a fourth surface which are opposite, the third surface is far away from the bearing seat, the third surface protrudes to form a second cambered surface, and the second cambered surface is provided with a through hole which is communicated with the third surface and the fourth surface;

the connecting column penetrates through the through hole, and one end of the connecting column is fixedly connected with the first connecting hole; and

the fixing element is provided with a butting part and a second connecting hole, the other end of the connecting column is fixedly connected with the second connecting hole,

the aperture of the through hole is larger than the outer diameter of the connecting column, the connecting column moves in the through hole by moving the fixing element, and the angle of the bearing seat is adjusted by the position change of the connecting column.

2. The adjustment device of claim 1, further comprising a resilient element abutting between the abutment and the second arcuate surface.

3. The adjustment device of claim 1, wherein the angular adjustment range of the carrier in any direction is less than or equal to 3 degrees.

4. The adjustment device of claim 1, wherein the first and second curved surfaces are spherical.

5. The adjustment device of claim 1, wherein the first and second curved surfaces are concentric circles centered on the connection post when the bearing seat abuts the base in parallel.

6. The adjustment device of claim 1, wherein the first surface of the carrier has a plurality of protrusions thereon, and the length of the plurality of protrusions is less than the maximum distance between the carrier and the base when the carrier abuts in parallel.

7. The adjustment device of claim 6, wherein the plurality of protrusions are symmetrically arranged in pairs with the connection post as a center of symmetry.

8. The adjustment device as claimed in claim 1, wherein the carrier comprises a plurality of clamping structures for clamping the optical element, and the carrier has four sides connecting the first surface and the second surface, the plurality of clamping structures are respectively located on at least two sides of the four sides of the carrier, and at least one side of the four sides is not provided with the plurality of clamping structures.

9. The adjustment apparatus according to claim 1, wherein the carrier comprises at least one position-limiting member, and the carrier has four side surfaces connecting the first surface and the second surface, the at least one position-limiting member is disposed on at least one of the four side surfaces of the carrier, the base comprises at least one position-limiting groove, and the base has four side surfaces connecting the third surface and the fourth surface, the at least one position-limiting groove is disposed on at least one of the four side surfaces of the base corresponding to one side surface of the at least one position-limiting member, and the at least one position-limiting member is at least partially disposed in the at least one position-limiting groove.

10. The adjustment device of claim 1, wherein the attachment post is a threaded post and the securing element is a stepped nut.

11. A projection device, comprising an illumination system and an optical-mechanical module, wherein:

the illumination system is for providing an illumination beam and comprises an optical element and an adjustment device, wherein:

adjusting device is including bearing seat, base, spliced pole and fixed component, wherein:

the bearing seat bears the optical element and is provided with a first surface and a second surface which are opposite, the first surface is far away from the optical element, the first surface protrudes to form a first cambered surface, and the first cambered surface is provided with a first connecting hole which is communicated with the first surface and the second surface;

the base is supported on the first cambered surface and provided with a third surface and a fourth surface which are opposite, the third surface is far away from the bearing seat, the third surface protrudes to form a second cambered surface, and the second cambered surface is provided with a through hole which is communicated with the third surface and the fourth surface;

the connecting column penetrates through the through hole, and one end of the connecting column is fixedly connected with the first connecting hole; and

the fixed element is provided with a butting part and a second connecting hole, and the other end of the connecting column is fixedly connected with the second connecting hole; and

the optical-mechanical module is configured on the transmission path of the illumination light beam and is used for converting the illumination light beam into an image light beam,

the aperture of the through hole is larger than the outer diameter of the connecting column, the connecting column moves in the through hole by moving the fixing element, and the angle of the bearing seat is adjusted by the position change of the connecting column.

12. The projection device of claim 11, wherein the adjustment device further comprises an elastic element abutting between the abutting portion and the second arc surface.

13. The projection device of claim 11, wherein the first arc surface and the second arc surface are spherical surfaces.

14. The projection apparatus as claimed in claim 11, wherein the first and second arc surfaces are concentric circles having the connection column as a symmetry center when the bearing seat abuts against the base in parallel.

15. The projection apparatus according to claim 11, wherein the first surface of the holder has a plurality of protrusions thereon, and the length of the plurality of protrusions is less than the maximum distance between the holder and the base when the holder abuts against the base in parallel.

16. The projection device of claim 15, wherein the plurality of protrusions are symmetrically arranged in pairs with the connecting column as a center of symmetry.

17. The projection apparatus of claim 11, wherein the carrier includes a plurality of clamping structures for clamping the optical element, and the carrier has four sides connecting the first surface and the second surface, the plurality of clamping structures are respectively located on at least two sides of the four sides of the carrier, and at least one side of the four sides is not provided with the plurality of clamping structures.

18. The projection apparatus according to claim 11, wherein the supporting base comprises at least one position-limiting element, and the supporting base has four side surfaces connecting the first surface and the second surface, the at least one position-limiting element is disposed on at least one of the four side surfaces of the supporting base, the base comprises at least one position-limiting groove, and the base has four side surfaces connecting the third surface and the fourth surface, the at least one position-limiting groove is disposed on at least one of the four side surfaces of the base corresponding to one side surface of the at least one position-limiting element, and the at least one position-limiting element is at least partially disposed in the at least one position-limiting groove.

19. The projection device of claim 11, wherein the attachment post is a threaded post and the securing element is a stepped nut.

20. The projection device of claim 11, wherein the base is a portion of a housing of the projection device.

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