CN210042053U

CN210042053U - Adjusting device and projection device

Info

Publication number: CN210042053U
Application number: CN201920800801.4U
Authority: CN
Inventors: 黄守正
Original assignee: Coretronic Corp
Current assignee: Coretronic Corp
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-02-07
Anticipated expiration: 2029-05-30

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

Adjusting device and projection device

Technical Field

The present invention relates to an adjusting device and a projection apparatus, and more particularly, to an adjusting device for adjusting an optical element and a projection apparatus using the same.

Background

The projection device is a display device for generating large-size images, and the development of the technology is continuously progressing. The projection device has an imaging principle of converting an illumination beam generated by an illumination system into an image beam by a light valve, and projecting the image beam onto a projection target (such as a screen or a wall surface) through a projection lens to form a projection image. Generally, manufacturers who produce projection apparatuses have adjusted the internal optical elements to accurate positions and angles when the products are shipped from factories, so as to achieve good projection effects. However, in the process of using the optical device, the optical device inevitably generates position deviation and angle deviation, so an adjusting mechanism with easy adjustment and stability is required to be provided for subsequent maintenance and adjustment.

In the prior art, adjustment is usually performed by three methods, i.e., by providing a rotating pillar of an adjustment seat, providing a plurality of sets of adjustment seats, and providing an adjustment screw for screwing the adjustment seats to the outside of the sidewall. However, in the above method of installing the rotating pillar of the adjusting base, it is difficult to achieve the effect of fixing the whole lens structure only by the pillar structure, and an additional fixing member is required to fix the adjusting base, so that a jig is required to be additionally used during adjustment. However, in the process of fixing the adjusting seat by using the jig locking screw, the adjusting seat may slightly deviate, so that the light output efficiency is not as good as expected. In addition, due to physical limitations, the support columns cannot be installed as rotation axes in both directions, only the support columns can be installed as rotation axes in one direction, and the frame of the adjustment seat can be used as rotation axes in the other direction, so that the rotation center point is not on the lens, which causes the center of the lens to shift during rotation, thereby reducing the imaging quality. Moreover, the periphery of the optical element is covered by the edge structure of the adjusting seat, so that light rays can be blocked by the edge structure and are limited to the arrangement of other elements. In addition, in the above method of providing multiple sets of adjusting seats and providing adjusting screws for screwing the adjusting seats to the outside of the sidewall, there are still problems of large space requirement and complex structure, resulting in high cost. In addition, the problem of the edge structure of the adjusting seat covering the periphery of the lens is still not solved in the above method.

The background section is only provided to aid in understanding the present invention, and therefore the disclosure in the background section may include some known techniques which do not constitute a part of the knowledge of those skilled in the art. The disclosure in the "background" section does not represent that content or the problems which may be solved by one or more embodiments of the present invention are known or appreciated by those skilled in the art prior to the filing of the present application.

SUMMERY OF THE UTILITY MODEL

The utility model provides an adjusting device and projection arrangement, adjustable optical element and promote the optics quality, and the structure is firm simple and can reduce occupation 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 a part of or all of the above or other objects, an embodiment of the present invention provides an adjusting device 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 is far away from the optical element and protrudes to form a first cambered surface. The first cambered surface is provided with a first connecting hole 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 far away from the bearing seat, and the third surface protrudes 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. The connecting column is arranged in the through hole in a penetrating way. One end of the connecting column is fixedly connected with the first connecting hole. The fixing element is provided with an abutting part and a second connecting hole. The other end of the connecting column is fixedly connected with the second connecting hole, 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.

In order to achieve one or a part of or all of the above or other objects, another embodiment of the present invention provides a projection apparatus, which includes an illumination system and an optical module. The illumination system is used for providing an illumination light beam. The illumination system comprises an optical element and an adjusting device. The adjusting device comprises a carrying 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 is far away from the optical element and protrudes to form a first cambered surface. The first cambered surface is provided with a first connecting hole 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 far away from the bearing seat, and the third surface protrudes 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. The connecting column is arranged in the through hole in a penetrating way. One end of the connecting column is fixedly connected with the first connecting hole. The fixing element is provided with an abutting part and a second connecting hole. The other end of the connecting column is fixedly connected with the second connecting hole. 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. Wherein, 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.

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 apparatus of the present invention, the supporting base of the adjusting device can be partially attached to the base and adjusted in angle by moving or rotating the connecting column. Therefore, the adjusting device and the projection apparatus of the present invention can adjust the optical element to improve the optical quality, and have stable and simple structure and reduced occupied space.

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a block diagram of a projection apparatus according to an embodiment of the present invention.

Fig. 2A and fig. 2B are schematic perspective views of an adjusting device according to an embodiment of the present invention at different viewing angles.

Fig. 3 is a schematic cross-sectional view of the adjusting device shown in fig. 2A and 2B.

Fig. 4A and 4B are exploded perspective views of the adjustment device of fig. 2A and 2B from different angles, respectively.

Detailed Description

The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of a preferred embodiment of the invention as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

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

Specifically, in the present embodiment, the optical-mechanical module 30 includes, for example, a light uniformizing element, at least one light valve, a projection lens and a plurality of optical elements, but the present invention is not limited thereto. The dodging element is disposed on the transmission path of the illumination light beam L1 and is used for adjusting the spot shape of the illumination light beam L1 so that the spot shape of the illumination light beam L1 can match the shape (e.g., rectangle) of the working area of the light valve, and the light intensity of the light beam L1 is uniform by enabling the spots to have uniform or close light intensity. In the embodiment, the light uniformizing element is, for example, an integrating rod, but in other embodiments, the light uniformizing element may also be other suitable types of optical elements, such as a lens array (fly eye lens), and the invention is not limited thereto.

Examples of the light valve include reflective light modulators such as Liquid Crystal On Silicon (LCoS) panels and Digital Micro-mirror devices (DMDs). In some embodiments, the light valve may also be a transmissive light Modulator such as a transmissive Liquid Crystal Panel (transmissive Liquid Crystal Panel), Electro-Optic Modulator (Electro-Optic Modulator), Magneto-Optic Modulator (Magneto-Optic Modulator), Acousto-Optic Modulator (AOM), and the like. The present invention does not limit the type and kind of the light valve. The detailed steps and embodiments of the method for converting the illumination beam L1 to provide the image beam L2 by the light valve can be obtained from the general knowledge in the art, and thus the detailed description thereof is omitted.

The projection lens includes, for example, a combination of one or more optical lenses having diopter, and includes, for example, various combinations of non-planar lenses such as a biconcave lens, a biconvex lens, a meniscus lens, a convex-concave lens, a plano-convex lens, and a plano-concave lens. In an embodiment, the projection lens may also include a plane optical lens, which projects the image beam L2 from the light valve to the projection target in a reflective or transmissive manner. The utility model discloses the configuration and the kind to projection lens are not restricted.

The plurality of optical members may be, for example, a lens, a reflector, a beam splitter, a plane lens, a filter, or a refraction prism, but the present invention is not limited thereto. These optical elements are used for guiding the illumination light beam L1 emitted from the illumination system 20 to the light valve, or guiding the image light beam L2 converted by the light valve to the projection lens.

The illumination system 20 comprises an optical element 50 and an adjustment device 100. Specifically, in the present embodiment, the illumination system 20 includes a light source 40, an optical element 50, an adjustment device 100, and a plurality of other optical elements. The light source 40 provides a light beam, which is transmitted through the optical element 50 and then passes through other optical elements such as a wavelength conversion element or a filter element, so as to form an 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 two, but the invention is not limited thereto. The optical element 50 is, for example, a mirror, and can be used to guide the light beam path, but the invention is not limited thereto. The optical element 50 described below will be exemplified by a mirror.

Fig. 2A and fig. 2B are schematic perspective views of an adjusting device 100 according to an embodiment of the present invention at different viewing angles. Please refer to fig. 1 to fig. 2B. In the present embodiment, the adjusting device 100 is used for carrying the optical element 50 and adjusting the angle of the optical element 50. The adjusting apparatus 100 includes a supporting base 110, a base 120, a connecting column 130 and a fixing element 140. The carrier 110 is used for carrying the optical element 50, and the user is used for moving or rotating the fixing element 140 to adjust the position of the optical element 50 in the space.

Fig. 3 is a cross-sectional view of the adjustment device 100 shown in fig. 2A and 2B. Fig. 4A and 4B are exploded perspective views of the adjustment apparatus 100 of fig. 2A and 2B from different angles, respectively. Please refer to fig. 2A to fig. 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 a side of the optical element 50 facing away from the second surface S2 is used for receiving and reflecting the light beam.

In the present embodiment, the carrier 110 includes a plurality of clamping structures 112 for clamping the optical element 50. Specifically, the carrier seat 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 seat 110, and at least one side surface B1 of the four side surfaces B1 is not provided with the clamping structure 112. In other words, in the present embodiment, the optical element 50 can be fixed on the supporting base 110 by two or three clamping structures 112. For example, as shown in fig. 4A, when viewed from the perspective of fig. 4A, the side surfaces B1 of the upper side, the left side and the lower side of the carrier seat 110 are respectively provided with the clamping structure 112, but the side surface B1 of the right side is not provided with the clamping structure 112; as shown in fig. 4B, the side surfaces B1 of the upper, right and lower sides of the carrier base 110 are provided with the clamping structures 112, and the side surface B1 of the left side is not provided with the clamping structures 112, as viewed from the perspective of fig. 4B. Therefore, at least one side surface B1 of the four side surfaces B1 is not provided with the clamping structure 112, so that the overall volume of the adjusting apparatus 100 is reduced, and the light beam transmitted to the optical element 50 is not blocked by the clamping structure 112 at the edge of the carrying seat 110, which may affect the optical quality.

The first surface S1 of the carrier 110 protrudes to form a first arc a1 for abutting the base 120, such that the first surface S1 is spaced apart from the surface of the base 120, as shown in fig. 3. Therefore, the supporting base 110 can rotate by abutting the first arc surface a1 to the base 120, and the distance between the first surface S1 and the base 120 is the maximum rotation range of the supporting base 110. In addition, in the 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 thereto.

The base 120 is supported against the first arc surface a1 of the carrier base 110. The base 120 has a third surface S3 and a fourth surface S4 opposite to each other, wherein the third surface S3 is far away from the susceptor 110. In other words, the carrier seat 110 is supported against the fourth surface S4 of the base 120. The third surface S3 of the base 120 protrudes to form a second arc a2 for abutting against the fixing element 140, so that the fixing element 140 can slide flatly on the surface of the second arc a2, as shown in fig. 3. In this embodiment, the second arc surface a2 is a spherical surface, and when the supporting seat 110 is parallel to the base 120, the first arc surface a1 and the second arc surface a2 are concentric circles using the connecting column 130 as a center of symmetry, so as to optimize the rotation effect of the supporting seat 110, but the present invention is not limited thereto. It should be noted that the base 120 can be locked to the housing of the projection apparatus 10. Alternatively, the base 120 may be a part of the housing of the projection device 10, but the invention is not limited thereto.

The first cambered surface a1 of the carrier 110 has a first connection hole H1 communicating the first surface S1 and the second surface S2. The second cambered surface a2 of the base 120 has a through hole T communicating 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 carrier 110 and the second connecting hole H2 of the fixing element 140 have the same aperture size, and the aperture size of the through hole T of the base 120 is larger than the aperture sizes of the first connecting hole H1 and the second connecting hole H2.

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

In addition, in the present embodiment, the adjusting apparatus 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. Therefore, it can provide sufficient supporting force and reduce the effect of backlash between the connecting column 130 and the fixing element 140.

In detail, when the optical element 50 is to be angularly adjusted, the user can manipulate the fixing element 140 to rotate or slide on the second arc surface a2 of the base 120. With the above-mentioned operation, since one end of the connecting rod 130 is connected to the fixing element 140, the connecting rod 130 can be rotated or moved 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 carrier base 110, the rotation or movement of the connecting column 130 can drive the angle of the carrier base 110 to be adjusted by the position change of the connecting column 130. More specifically, when the carrier 110 abuts against the base 120, the first arc surface a1 of the carrier 110 and the through hole T of the base 120 form a ball-and-socket structure, so that the base 120 can partially abut against the first arc surface a1 of the carrier 110 to move. Therefore, when the user uses the adjusting device 100, the user can adjust the position of the optical element by simple mechanism operation to improve the optical quality, and the structure of the adjusting device 100 is stable and simple and can reduce the occupied space.

In the embodiment, the first surface S1 of the carrier 110 has a plurality of protrusions P, and the length of the protrusions P is smaller than the maximum distance (i.e. the maximum distance between the first surface S1 and the base 120) when the carrier 110 abuts against the base 120 in parallel. The protrusions P are used to abut against the base 120 when the carrier 110 rotates, so as to limit the adjustment stroke of the carrier 110. Therefore, the maximum rotation amplitude of the supporting base 110 can be designed by adjusting the height of the protrusion P, so that the supporting base 110 is not over-adjusted. In the present embodiment, the protrusions P are symmetrically disposed in pairs with the connecting column 130 as the center of symmetry, but the present invention is not limited thereto, and the shape, length and disposition of the protrusions P may be changed as required. In this embodiment, the angular adjustment range of the carrying seat 110 in any direction is less than or equal to 3 degrees, but the present invention is not limited thereto.

In the present embodiment, the supporting 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 are mutually matched. Specifically, the position-limiting member 114 is at least partially disposed in the position-limiting groove 122. In detail, on the four side surfaces B1 of the susceptor 110, the position-limiting member 114 is disposed on at least one of the four side surfaces B1. The base 120 has four side surfaces B2 connecting the third surface S3 and the fourth surface S4, and the stopper groove 122 is disposed on at least one of the four side surfaces B2 of the four side surfaces B2 of the base 120. For example, in the embodiment, the position-limiting members 114 are disposed on two opposite side surfaces B1 of the susceptor 110, and the position-limiting grooves 122 are disposed on two opposite side surfaces B2 of the base 120 corresponding to the two opposite side surfaces B1. In other words, if the number of the position-limiting members 114 of the carrier 110 is two, the position-limiting members are respectively located on any two opposite side surfaces B1 of the four side surfaces B1 of the carrier 110, and the number of the position-limiting grooves 122 of the base 120 is two, and the position-limiting members are respectively located on two opposite side surfaces B2 of the four side surfaces B2 of the base 120 corresponding to two position-limiting members 114. Therefore, when the angle of the supporting base 110 is adjusted, the supporting base 110 can be engaged with the limiting groove 122 of the corresponding base 120 via the limiting member 114, so as to prevent the supporting base from rotating in a certain direction. In other words, in different embodiments, the position-limiting element 114 and the position-limiting groove 122 can be disposed in different directions according to the adjustment requirement of the optical element 50, so as to limit the adjustable dimension of the optical element 50, which is not limited in this disclosure.

In summary, the embodiments of the present invention have at least one of the following advantages or effects. In the adjusting device and the projection apparatus of the present invention, the supporting base of the adjusting device can be partially attached to the base and adjusted in angle by moving or rotating the connecting column. Therefore, the adjusting device and the projection apparatus of the present invention can adjust the optical element to improve the optical quality, and have stable and simple structure and reduced occupied space.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all simple equivalent changes and modifications made according to the claims and the disclosure of the present invention are still included in the scope of the present invention. Moreover, it is not necessary for any embodiment or claim to address all of the objects, advantages, or features disclosed herein. In addition, the abstract and the utility model name are only used for assisting the retrieval of patent documents and are not used for limiting the scope of the invention. Furthermore, the terms "first", "second", and the like in the description or the claims are used only for naming elements (elements) or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit on the number of elements.

Description of reference numerals:

10: projection device

20: lighting system

30: optical-mechanical module

40: light source

50: optical element

100: adjusting device

110: bearing seat

112: clamping structure

114: position limiting piece

120: base seat

122: limiting groove

130: connecting column

140: fixing element

142: abutting part

150: elastic element

A1: first arc surface

A2: second arc surface

B1, B2: side surface

H1: first connecting hole

H2: second connecting hole

P: raised part

S1: first surface

S2: second surface

S3: third surface

S4: the fourth surface

T: through hole

L1: illuminating light beam

L2: an image beam.

Claims

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 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,

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.