CN112445057B

CN112445057B - Reflector adjusting mechanism, projection optical machine and projector

Info

Publication number: CN112445057B
Application number: CN202010833188.3A
Authority: CN
Inventors: 邓朝山; 吴积涛; 孙峰; 朱青
Original assignee: Shenzhen Anhua Optoelectronics Technology Co Ltd
Current assignee: Shenzhen Anhua Photoelectric Technology Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2022-04-01
Anticipated expiration: 2040-08-18
Also published as: CN112445057A

Abstract

The invention discloses a reflector adjusting mechanism, a projection optical machine and a projector, wherein the reflector adjusting mechanism comprises a fixed seat, a supporting piece, a connecting piece and a plurality of adjusting pieces, wherein the fixed seat is provided with a through hole and a plurality of adjusting holes, and the through hole and the adjusting holes extend in parallel; the supporting piece is arranged opposite to the fixed seat, and the supporting piece is provided with a threaded hole corresponding to the through hole; the back of the support is used for fixing and bearing the reflector; the rod part of the connecting piece is arranged in the through hole in a penetrating way and is connected with the threaded hole, and the head part of the connecting piece is abutted against the front surface of the fixed seat; the adjusting pieces are arranged in the adjusting holes in a one-to-one correspondence mode, and act on the supporting pieces along the axis direction of the adjusting holes so that the supporting pieces can swing relative to the fixed seat; the back of the fixing seat comprises a first limiting surface, the tangential direction of each part corresponding to the circumferential direction of the screw-in connecting piece is crossed with the first limiting surface, and the supporting piece is in limiting fit with the first limiting surface. The reflector adjusting mechanism of the invention is easy to adjust the reflector and the reflector is not easy to rotate around the axis of the connecting piece.

Description

Reflector adjusting mechanism, projection optical machine and projector

Technical Field

The invention relates to the technical field of optical projection equipment, in particular to a reflector adjusting mechanism, a projection optical machine and a projector.

Background

The core component of the micro projector is a projector light machine. In consideration of portability of the micro projector in design, the projector usually needs to arrange a reflector inside the optical illumination system to change the direction of the light path. In practical application, because the precision of the projector system is high, the influence links on the projection quality are more, wherein the installation precision of the reflector belongs to one of the key links, and the projector also comprises a reflector adjusting device for adjusting the reflector due to the correct realization of the function of the reflector and the compensation of errors of other links.

In the prior art, the reflector is fixed on a flat support, and a plurality of screws are connected perpendicular to the flat support, and the screws are used for fixing the support to the housing of the projection optical engine and adjusting the relative position between the support and the housing. Thus, although the adjustment range of each screw is relatively large, the adjustment difficulty is large in practical application. Furthermore, if the axis of the screws is perpendicular to the mirror and the screws are threadedly connected to the support, there is a tendency for one of the screws to rotate about the axis of that screw during adjustment, causing the support to be offset from the axis of the other screw, which in turn causes the mirror to tilt.

In summary, the current mirror adjusting device has great adjusting difficulty.

Disclosure of Invention

In view of the above-described situation, a main object of the present invention is to provide a mirror adjustment mechanism that facilitates adjustment of the position of a mirror.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a reflector adjusting mechanism comprises a fixed seat, a supporting piece, a connecting piece and a plurality of adjusting pieces, wherein,

the fixed seat is provided with a through hole and a plurality of adjusting holes, and the axis of the through hole is parallel to the axis of the adjusting holes;

the supporting piece is arranged opposite to the fixed seat corresponding to the plurality of adjusting holes, and the supporting piece is provided with a threaded hole corresponding to the through hole; one surface of the support piece, which is far away from the fixed seat, is used for fixing and bearing the reflector;

the connecting piece comprises a rod part and a head part arranged at one end of the rod part, the rod part is arranged in the through hole in a penetrating mode and is in threaded connection with the threaded hole, and the head part abuts against one surface, away from the supporting piece, of the fixed seat;

the adjusting pieces are arranged in the adjusting holes in a one-to-one correspondence mode, and the adjusting pieces can movably act on the supporting pieces along the axis of the adjusting holes so that the supporting pieces can swing relative to the fixed seat;

one surface of the fixing seat facing the supporting piece comprises a first limiting surface, the connecting piece is screwed into each tangential direction corresponding to the circumferential direction of the threaded hole and is crossed with the first limiting surface, and the supporting piece is in limiting fit with the first limiting surface.

Preferably, one surface of the supporting member facing the fixing seat includes a second limiting surface, and the second limiting surface is parallel to the first limiting surface.

Preferably, the through hole penetrates through the first limiting surface, and the threaded hole penetrates through the second limiting surface.

The invention also provides a projection optical machine, which comprises a shell, an optical lighting system, a reflector, an image modulation element, a projection lens and the reflector adjusting mechanism; the reflector is fixed on a supporting piece of the reflector adjusting mechanism.

Preferably, the housing includes a bottom wall and a side wall, the fixing seat of the mirror adjusting mechanism is integrally disposed with the side wall, and the side wall is provided with a mounting hole having a mounting direction identical to the first direction in a region adjacent to the fixing seat; the axes of the through hole and the adjusting hole are parallel to the first direction; the first limiting surface and the reflector are both obliquely arranged relative to the first direction; the outer side face of the corresponding area of the mounting hole and one face, facing the outer side of the shell, of the reflector are arranged in an inferior angle mode.

Preferably, one surface of the fixing seat facing the supporting member further includes a first step surface and a second step surface, the first step surface and the second step surface are located at the periphery of the first limiting surface, the first step surface is located at one side of the through hole close to the mounting hole, and the second step surface is located at one side of the through hole far away from the mounting hole;

the two ends of the support piece on the two sides of the threaded hole are respectively adjacent to the first step surface and the second step surface, and the adjusting piece can movably act on the two ends of the support piece along the first direction.

Preferably, two ends of the supporting member include a first positioning surface and a second positioning surface, the first positioning surface is opposite to the first step surface, and the second positioning surface is opposite to the second step surface;

the first positioning surface and the second positioning surface are perpendicular to the first direction, and the adjusting piece is spirally abutted against the first positioning surface and the second positioning surface along the first direction respectively.

Preferably, the first limit surface, the second limit surface and the reflector are arranged in parallel two by two.

Preferably, the bottom wall is provided with a support boss in the area adjacent to the fixed seat, and the support boss is provided with a dispensing hole penetrating through the bottom wall; the supporting piece is matched with the top surface of the supporting boss in a positioning mode, and the supporting piece covers the glue dispensing hole.

The invention also provides a projector which is characterized by comprising the optical projection machine.

The reflector adjusting mechanism adopts a separated structure design for adjusting and fixing the reflector, namely a connecting piece is independently arranged to fixedly support a supporting piece for bearing the reflector, and the adjusting piece mainly plays a role in adjusting the position of the supporting piece. The supporting piece and the fixing seat are connected through the connecting piece, preliminary positioning can be met between the two connected parts, and therefore on the basis, the reflector can be adjusted to the correct position only through a small number of adjusting pieces and a small adjusting amplitude. In addition, through the spacing cooperation of support piece and first spacing face, when the precession connecting piece, because first spacing face and the connecting piece precession circumferencial direction everywhere tangential cross, consequently, first spacing face can produce the opposite spacing moment of circumferencial direction of this precession to hinder support piece to follow the connecting piece rotation, and then avoid the position of speculum to take place to deflect.

Other advantages of the present invention will be described in the detailed description, and those skilled in the art will understand the technical features and technical solutions presented in the description.

Drawings

Preferred embodiments of a mirror adjusting mechanism, a projector optical machine, and a projector according to the present invention will be described below with reference to the accompanying drawings. In the figure:

FIG. 1 is a schematic rear view of a preferred embodiment of a projection light according to the present invention;

FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. 1;

FIG. 3 is a schematic view of a portion of the housing A of FIG. 2 in cooperation with a reflector;

FIG. 4 is a schematic perspective view of the optical projection engine of FIG. 1;

FIG. 5 is a schematic perspective view of a partial structure shown at B in FIG. 4;

FIG. 6 is an exploded view of the structure of FIG. 5;

FIG. 7 is a schematic diagram of a backside structure of the structure of FIG. 5;

FIG. 8 is an exploded view of the structure of FIG. 7;

FIG. 9 is a schematic front view of the structure of FIG. 5;

fig. 10 is a schematic cross-sectional view taken along line X-X in fig. 9.

The reference numbers illustrate:

reference numerals

Name (R)

Reference numerals

Name (R)

Reference numerals

Name (R)

10

Shell body

25

Converging lens group

621

Threaded hole

11

Bottom wall

30

Reflecting mirror

622

Second limit surface

12

Side wall

40

Image modulation element

623

A first positioning surface

13

Mounting hole

50

Projection lens

624

Second positioning surface

14

Support boss

60

Reflector adjusting mechanism

63

Connecting piece

15

Glue dispensing hole

61

Fixed seat

631

Rod part

21a，21b

Light source

611

Through hole

632

Head part

21c，21d

Light source

612

Adjusting hole

64

Adjusting

part

22a，22b

Collimating lens group

613

A first limit surface

70

Light

splitting prism group

22c，22d

Collimating lens group

614

First step surface

80

Vibrating

mirror

23a，23b

Dichroic mirror

615

Second step surface

24

Compound eye lens group

62

Support piece

Detailed Description

Before describing the detailed structure of the mirror adjusting apparatus of the present invention, the projection light machine of a preferred embodiment of the present invention is first described.

Referring to fig. 1 to 4, in an embodiment of the invention, the optical projection engine includes a housing 10, an optical illumination system (not labeled), a reflector 30, an image modulation element 40, a projection lens 50, and a reflector adjustment mechanism 60; the mirror 30 is fixed to a support 62 of the mirror adjustment mechanism 60. Wherein the content of the first and second substances,

the optical illumination system is used to generate parallel three-color light, and its specific configuration has many variations according to the prior art. In the present embodiment, specifically, the optical illumination system includes light sources (21a, 21b, 21c, 21d), collimator lenses (22a, 22b, 22c, 22d), dichroic mirrors (23a, 23b), a fly-eye lens group 24, a condensing lens group 25; wherein the light source is in particular an LED light source (21a, 21b, 21c, 21 d). In a variant embodiment of the optical illumination system, the light source may be an RGB laser, a mixed light laser, and a bulb type light source. According to different light sources, a dichroic mirror, a color wheel, a fluorescent wheel, an X prism and the like can be matched and selected. Furthermore, the light equalizer can be matched with a compound eye type and a light guide tube type selectively.

The light emitted from the light sources (21a, 21b, 21c, 21d) of the optical illumination system is internally adjusted to output parallel light, and the reflecting mirror 30 is used for changing the propagation direction of the parallel light. In this embodiment, the parallel light transmitted through the fly-eye lens 24 is irradiated onto the reflecting mirror 30, and is then projected onto the free-form surface lens of the converging lens group 25 with changing direction.

The image modulation element 40 is used for controlling the on-off of the light beam according to the received image signal, thereby realizing image display. The conventional image modulation device 40 includes a DMD digital micromirror and a liquid crystal panel, and in this embodiment, the DMD digital micromirror is preferably used. In order to realize a more compact structure with the DMD digital micromirror, the projection light engine further includes a beam splitting prism set 70, specifically, a TIR prism.

The projection lens 50 is used to enlarge and project the image modulated by the image modulation element 40 onto a screen. In order to improve the resolution by using the XPR technology, the optical projection engine of the embodiment further includes a vibrating mirror 80 disposed between the beam splitting prism set 70 and the projection lens 50.

As can be seen from the above description, if the reflector 30 is removed, the optical illumination system, the converging lens group, the beam splitting prism group 70, and the projection lens 50 are all arranged along a straight line, so that the projection light engine becomes too slim. Meanwhile, the optical elements of the optical illumination system are all mounted on the housing 10, and manufacturing errors of the housing 10, assembly errors of the optical illumination system, and errors in calculation of the optical path may generate a requirement for adjusting the position of the mirror 30, that is, compensating for a partial comprehensive error of the system by adjusting the position of the mirror 30.

A preferred embodiment of the mirror adjusting apparatus of the present invention will now be described.

Referring to fig. 5-10, in one embodiment, the mirror adjusting mechanism 60 of the present invention includes a fixing base 61, a supporting member 62, a connecting member 63, and a plurality of adjusting members 64, wherein,

the fixed seat 61 is provided with a through hole 611 and a plurality of adjusting holes 612, and the axis of the through hole 611 is parallel to the axis of the adjusting holes 612;

the supporting member 62 is disposed opposite to the fixing seat 61 corresponding to the plurality of adjusting holes 612, and a threaded hole 621 is formed on the supporting member 62 corresponding to the through hole 611; one surface of the supporting piece 62, which faces away from the fixed seat 61, is used for fixing and bearing the reflecting mirror 30;

the connecting member 63 includes a rod 631 and a head 632 disposed at one end of the rod 631, the rod 631 passes through the through hole 611 and is in threaded connection with the threaded hole 621, and the head 632 abuts against a surface of the fixing base 61 facing away from the supporting member 62;

the adjusting pieces 64 are correspondingly arranged in the adjusting holes 612 one by one, and the adjusting pieces 64 can movably act on the supporting piece 62 along the axis of the adjusting holes 612 so as to enable the supporting piece 62 to swing relative to the fixed seat 61;

one surface of the fixing base 61 facing the supporting member 62 includes a first limiting surface 613, the tangential direction of the connecting member 63 screwed into the circumferential direction of the threaded hole 621 intersects with the first limiting surface 613, and the supporting member 62 is in limiting fit with the first limiting surface 613.

In this embodiment, the fixing base 61 is not limited in structural form, and may be a simple plate or a frame structure. The reflector 30 cannot be directly fixed because the reflector 30 is a thin-walled structure and is usually made of a brittle material, and therefore the support 62 is required to be disposed for carrying, for example, the reflector 30 is bonded to the support 62. In order to enlarge the bonding area and reduce the volume, the support 62 is generally provided in a plate shape, so that the reflecting mirror 30 and the support 62 can be assembled to each other in a stacked manner.

The structure of the connecting member 63 may correspond to a bolt, and the head 632 thereof may be provided with an inner hexagonal groove, a straight groove or a cross groove, etc. to facilitate the rotation of the connecting member 63.

The way of adjusting the supporting member 62 by the adjusting member 64 may be a way of pushing the supporting member 62 away from the fixed seat 61, a way of pulling the fixed seat 61 toward the fixed seat 61, or a way of combining the pushing and pulling. The structure of the adjusting member 64 is corresponding to the adjusting manner, for example, if the adjusting member is only pushed away, one end of the adjusting member 64 abuts against the surface of the supporting member 62 facing the fixing base 61; if the pushing away and pulling away are combined, one end of the adjusting member 64 may be embedded in the supporting member 62; the form of the adjusting hole 612 may also correspond to the moving manner of the adjusting member 64, for example, if the adjusting member 64 moves only along a straight line, the adjusting hole 612 may be a fixing hole or a fastening hole; if a screw driving manner is required, the adjusting hole 612 may be a threaded hole 621 which is screw-engaged with the adjusting member 64.

The first position-limiting surface 613 can prevent the support member 62 from rotating according to the connecting member 63 as long as the first position-limiting surface 613 is not parallel to the circumferential direction of the screwing-in of the connecting member 63, so that the first position-limiting surface 613 can have various positions, for example, the first position-limiting surface 613 forms an included angle with the axis of the connecting member 63, or the first position-limiting surface 613 is parallel to the axis of the connecting member 63. In order to increase the strength of the through hole 611 and the adjusting hole 612, an annular rib surrounding the through hole 611 and the adjusting hole 612 may be disposed on a surface of the fixing base 61 facing away from the supporting member 62.

In addition, in order to facilitate the better matching of the connecting member 63 and the adjusting member 64 with the fixing seat 61, the area of the surface of the fixing seat 61 facing away from the supporting member 62, which is adjacent to the through hole 611, can be made perpendicular to the axial direction of the connecting member 63, and the area adjacent to the adjusting hole 612 is made perpendicular to the axial direction of the adjusting member 64. And if the side of the fixed seat 61 facing away from the supporting part 62 is provided with a step shape in order to adapt to the connecting part 63 and the adjusting part 64, the fixed seat 61 can also increase the strength of the fixed seat by the reinforcing ribs which are connected with the steps. It can be understood that the reliability of the adjusted reflector 30 is ensured by increasing the strength of the through hole 611, the adjusting hole 612 or the whole fixed seat 61, and the position rebound of the reflector 30 caused by the deformation of the structures is avoided.

The mirror adjusting mechanism 60 of the present invention is designed to separate the adjusting and fixing support of the mirror 30, i.e. a connecting member 63 is separately provided to fixedly support a supporting member 62 for carrying the mirror 30, and an adjusting member 64 mainly plays a role of adjusting the position of the supporting member 62. By connecting the support 62 to the holder 61 by means of a suitable connecting element 63, a preliminary positioning between the two parts to be connected is achieved, so that on this basis a smaller number of adjusting elements 64 and with a smaller adjustment range the mirror 30 can be adjusted to the correct position. In addition, the supporting member 62 is in limit fit with the first limit surface 613, and when the connecting member 63 is screwed in, the first limit surface 613 and the connecting member 63 are crossed at each tangential direction in the screwing circumferential direction, so that the first limit surface 613 can generate a limit moment in the opposite circumferential direction, thereby preventing the supporting member 62 from rotating along with the connecting member 63, and further preventing the position of the reflecting mirror 30 from deflecting.

Further, one surface of the supporting member 62 facing the fixing base 61 includes a second limiting surface 622, and the second limiting surface 622 is parallel to the first limiting surface 613. In this embodiment, since the position of the supporting member 62 relative to the fixing seat 61 is changed in the process of adjusting the supporting member 62, the second limiting surface 622 and the first limiting surface 613 are arranged on the supporting member 62 to cooperate with each other to better adapt to the change of the relative position of the supporting member 62, for example, when the first limiting surface 613 contacts the second limiting surface 622, the first limiting surface 613 and the second limiting surface 622 may contact each other through different portions, and it can be understood that the first limiting surface 613 and the second limiting surface 622 may also contact each other through different portions in a linear or point manner. Thus, the first limiting surface 613 can always maintain a good limiting effect. Preferably, the through hole 611 penetrates through the first position-limiting surface 613, and the threaded hole 621 penetrates through the second position-limiting surface 622. In the adjusting process, the supporting element 62 swings relative to the fixing base 61 with the connecting element 63 as the center, so that the through hole 611 and the threaded hole 621 penetrate the corresponding limiting surfaces, and the first limiting surface 613 and the second limiting surface 622 are distributed with the connecting element 63 as the center, so that the matching between the first limiting surface 613 and the second limiting surface 622 can better adapt to the change of the position of the supporting element 62.

Referring again to fig. 1-4, the present invention further provides a projection light machine, which includes a housing 10, an optical illumination system, a reflector 30, an image modulation element 40, a projection lens 50, and the above reflector adjustment mechanism 60; the mirror 30 is fixed to a support 62 of the mirror adjustment mechanism 60. The specific structure of the reflector adjustment device refers to the above embodiments, and since the projection optical machine adopts all technical solutions of all the above embodiments, all the beneficial effects brought by the technical solutions of the above embodiments are also achieved, and are not described in detail herein.

Further, the housing 10 includes a bottom wall 11 and a side wall 12, a fixing seat 61 of the mirror adjusting mechanism 60 is integrally disposed with the side wall 12, and the side wall 12 is provided with a mounting hole 13 having a mounting direction consistent with the first direction in a region adjacent to the fixing seat 61; the axes of the through hole 611 and the adjusting hole 612 are parallel to the first direction; the first limiting surface 613 and the reflecting mirror 30 are both disposed obliquely with respect to the first direction; the outer side surface of the region corresponding to the mounting hole 13 is disposed at a slight angle to a surface of the reflector 30 facing the outside of the housing 10, as indicated by θ in fig. 3.

In this embodiment, the housing 10 is formed by injection molding or die casting, that is, a mold cavity corresponding to the housing 10 is formed by splicing with a mold, and then a molding material is filled into the mold cavity, and finally the material is solidified to form the housing 10. It will be appreciated that although the housing 10 is injection or compression molded, it is not excluded that the material removal machining is performed on the basis thereof. The light projector is used to carry a plurality of components, so the structure of the housing 10 is complicated. In order to mount the various components or to enhance the strength or facilitate the heat dissipation, etc., the side wall 12 of the housing 10 may be provided with a plurality of holes or cavities, for example, holes for correspondingly mounting the respective collimator lens (22a, 22b, 22c, 22d) groups, in order that the pattern drawing direction of some holes may coincide with the pattern drawing direction of the mounting holes 13, for example, the holes on the upper side in fig. 2; the pattern drawing direction of other holes is consistent with a second direction, and the second direction is orthogonal to the first direction; such as the left-hand hole in fig. 2. The fixing base 61 forms a part of the side wall 12 of the housing 10, which is beneficial to saving the number of parts of the reflector adjusting device and making the whole structure of the projection light machine more compact. On the premise that the outer side surface of the mounting hole 13 adjacent to the fixed seat 61 and the surface of the reflector 30 facing the outer side of the housing 10 form a minor angle, if the axis of the through hole 611 and the axis of the adjusting hole 612 are perpendicular to the reflector 30, the mold drawing direction of the through hole 611 and the adjusting hole 612 will intersect with the mold drawing direction of the mounting hole 13, i.e., mold drawing interference will be caused. In the present embodiment, the axes of the through hole 611 and the adjusting hole 612 are arranged parallel to the first direction, so that the die drawing directions of the through hole 611 and the adjusting hole 612 do not intersect with the die drawing direction of the mounting hole 13 in the adjacent region, which improves the flexibility of the housing 10 in manufacturing, and enables the mirror adjusting mechanism 60 to be applied to more spatial layouts of the housing 10.

Further, referring to fig. 3, 6, 8 and 10, in an embodiment, a surface of the fixing base 61 facing the supporting member 62 further includes a first step surface 614 and a second step surface 615, the first step surface 614 and the second step surface 615 are located at a periphery of the first limiting surface 613, the first step surface 614 is located at a side of the through hole 611 close to the mounting hole 13, and the second step surface 615 is located at a side of the through hole 611 far from the mounting hole 13;

the two ends of the supporting member 62 at the two sides of the threaded hole 621 are respectively adjacent to the first step surface 614 and the second step surface 615, and the adjusting member 64 is respectively movably acted on the two ends of the supporting member 62 along the first direction.

In this embodiment, step surfaces are disposed on two sides of the first limiting surface 613 of the fixing seat 61, and two ends of the supporting member 62 are disposed adjacent to the first step surface 614 and the fourth step surface, respectively, so that on one hand, the adjusting member 64 can more easily touch the supporting member 62, thereby avoiding an excessive idle stroke; on the other hand, the fit between the fixing seat 61 and the supporting member 62 is made more compact.

Further, two ends of the support 62 include a first positioning surface 623 and a second positioning surface 624, the first positioning surface 623 is disposed opposite to the first step surface 614, and the second positioning surface 624 is disposed opposite to the second step surface 615;

the first positioning surface 623 and the second positioning surface 624 are perpendicular to the first direction, and the adjusting member 64 is spirally abutted against the first positioning surface 623 and the second positioning surface 624 along the first direction.

In this embodiment, the mirror 30 is pushed away by the abutment support 62, which is relatively simple, but which provides adjustment. In particular, after the preliminary positioning of the support 62 is completed, the adjustment member 64 can be inserted into the adjustment hole 612 from the outside of the fixing base 61 and further pushed into abutment with the support 62. Specifically, the adjusting hole 612 is a threaded hole 621, so that the adjusting method of the embodiment of the reflector 30 of the present invention for adjusting the reflector 30 is as follows: firstly, the connecting piece 63 passes through the through hole 611 on the fixed seat 61 and is screwed into the threaded hole 621 on the supporting piece 62, so that the supporting piece 62 is preliminarily fixed and approaches the fixed seat 61 with a predetermined gap; each adjustment member 64 is then threadably engaged with the adjustment aperture 612 and threaded into abutment with the support member 62; then testing whether the reflector 30 needs to be leveled, namely evaluating whether the position of the reflector 30 at the moment meets the requirement of the function; if the test results show that leveling is required, then one or more of the adjustment members 64 are adjusted accordingly to begin leveling the reflector 30; finally, after the mirror 30 has been leveled, the connecting piece 63 is screwed in again, so that the support 62 is fixed further.

Further, the first position-limiting surface 613, the second position-limiting surface 622 and the reflector 30 are disposed in parallel. In this way, the thickness of the reflector 30 is substantially the same throughout, which makes the structure of the reflector adjustment mechanism 60 more compact; on the other hand, since the thicknesses are substantially the same and the strengths at various positions are also substantially the same, the amount of deformation of the support member 62 is conveniently calculated; furthermore, it is convenient to machine the support 62 from substantially uniform sheet material.

Furthermore, a supporting boss 14 is arranged on the bottom wall 11 in the area adjacent to the fixed seat 61, and a dispensing hole 15 penetrating through the bottom wall 11 is formed in the supporting boss 14; the supporting piece 62 is matched with the top surface of the supporting boss 14 in a positioning mode, and the supporting piece 62 covers the glue dispensing hole 15.

In this embodiment, the top surface of the supporting boss 14 supports the supporting member 62, and since the top surface of the supporting boss 14 also intersects with the circumferential direction of the screw-in circumferential direction of the connecting member 63, the supporting member 62 can be restricted from rotating along with the connecting member 63 by cooperating with the first limiting surface 613. In addition, after the adjustment of the reflecting mirror 30 is completed, the supporting member 62 may be further fixed by dispensing through the dispensing hole 15 at the outer side of the housing 10, thus ensuring the reliability after the position adjustment of the reflecting mirror 30.

The invention also provides a projector which comprises the projection light machine. The specific structure of the projection optical machine refers to the above embodiments, and since the projector adopts all the technical solutions of all the above embodiments, all the beneficial effects brought by the technical solutions of the above embodiments are also achieved, and are not repeated here.

It will be appreciated by those skilled in the art that the above-described preferred embodiments may be freely combined, superimposed, without conflict.

It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the invention.

Claims

1. A reflector adjusting mechanism is characterized by comprising a fixed seat (61), a supporting piece (62), a connecting piece (63) and a plurality of adjusting pieces (64), wherein,

a through hole (611) and a plurality of adjusting holes (612) are formed in the fixing seat (61), and the axis of the through hole (611) is parallel to the axis of the adjusting holes (612);

the supporting piece (62) is arranged opposite to the fixed seat (61) corresponding to the plurality of adjusting holes (612), and a threaded hole (621) is formed in the supporting piece (62) corresponding to the through hole (611); one surface of the supporting piece (62) departing from the fixed seat (61) is used for fixing and bearing the reflecting mirror (30);

the connecting piece (63) comprises a rod part (631) and a head part (632) arranged at one end of the rod part (631), the rod part (631) penetrates through the through hole (611) and is in threaded connection with the threaded hole (621), and the head part (632) abuts against one surface, deviating from the supporting piece (62), of the fixed seat (61);

the adjusting pieces (64) are arranged in the adjusting holes (612) in a one-to-one correspondence manner, and the adjusting pieces (64) can movably act on the supporting piece (62) along the axial direction of the adjusting holes (612) to enable the supporting piece (62) to swing relative to the fixed base (61);

one surface of the fixing seat (61) facing the support piece (62) comprises a first limiting surface (613), the tangential direction of the connecting piece (63) which is screwed into the circumferential direction of the threaded hole (621) is crossed with the first limiting surface (613), and the support piece (62) is in limiting fit with the first limiting surface (613).

2. A mirror adjustment mechanism according to claim 1, wherein a surface of the support (62) facing the holder (61) comprises a second limiting surface (622), the second limiting surface (622) being parallel to the first limiting surface (613).

3. The mirror adjustment mechanism according to claim 2, wherein the through hole (611) penetrates the first stopper surface (613), and the threaded hole (621) penetrates the second stopper surface (622).

4. A projection light machine comprising a housing (10), an optical illumination system (20), a mirror (30), an image modulation element (40), a projection lens (50) and a mirror adjustment mechanism (60) according to any one of claims 1 to 3; the mirror (30) is fixed to a support (62) of the mirror adjustment mechanism (60).

5. The projection light engine of claim 4, characterized in that the housing (10) comprises a bottom wall (11) and a side wall (12), the fixing seat (61) of the reflector adjusting mechanism (60) is integrally arranged with the side wall (12), and the side wall (12) is provided with a mounting hole (13) with a mounting direction consistent with the first direction in a region adjacent to the fixing seat (61); the axes of the through hole (611) and the adjustment hole (612) are both parallel to the first direction; the first limiting surface (613) and the reflector (30) are both arranged obliquely relative to the first direction; the outer side surface of the corresponding area of the mounting hole (13) and one surface of the reflector (30) facing the outer side of the shell (10) are arranged at an inferior angle.

6. The light engine of claim 5, wherein the mirror adjustment mechanism (60) is the mirror adjustment mechanism (60) of claim 2;

one surface of the fixing seat (61) facing the support (62) further comprises a first step surface (614) and a second step surface (615), the first step surface (614) and the second step surface (615) are located on the periphery of the first limiting surface (613), the first step surface (614) is located on one side, close to the mounting hole (13), of the through hole (611), and the second step surface (615) is located on one side, far away from the mounting hole (13), of the through hole (611);

the two ends of the support piece (62) at the two sides of the threaded hole (621) are respectively adjacent to the first step surface (614) and the second step surface (615), and the adjusting piece (64) can movably act on the two ends of the support piece (62) along the first direction.

7. The light engine of claim 6, wherein the mirror adjustment mechanism (60) is the mirror adjustment mechanism (60) of claim 3;

two ends of the support (62) comprise a first positioning surface (623) and a second positioning surface (624), the first positioning surface (623) is opposite to the first step surface (614), and the second positioning surface (624) is opposite to the second step surface (615);

the first positioning surface (623) and the second positioning surface (624) are perpendicular to the first direction, and the adjusting piece (64) is spirally abutted against the first positioning surface (623) and the second positioning surface (624) along the first direction respectively.

8. The projection optical engine according to claim 7, wherein the first position-limiting surface (613), the second position-limiting surface (622) and the reflector (30) are arranged in parallel.

9. The projection optical engine according to any of the claims 5 to 8, characterized in that the bottom wall (11) is provided with a support boss (14) in the area adjacent to the fixing base (61), and the support boss (14) is provided with a dispensing hole (15) penetrating through the bottom wall (11); the supporting piece (62) is matched with the top surface of the supporting boss (14) in a positioning mode, and the supporting piece (62) covers the glue dispensing hole (15).

10. A projector comprising the light engine of any of claims 4-9.