CN218158705U

CN218158705U - Projection optical machine and projector

Info

Publication number: CN218158705U
Application number: CN202222157857.7U
Authority: CN
Inventors: 程炎; 高怡玮; 王源
Original assignee: Shenzhen Anhua Optoelectronics Technology Co Ltd
Current assignee: Shenzhen Anhua Photoelectric Technology Co ltd
Priority date: 2022-08-16
Filing date: 2022-08-16
Publication date: 2022-12-27
Anticipated expiration: 2032-08-16

Abstract

The utility model relates to a projection optical machine and projector, including smooth machine shell, prism subassembly, DMD and camera lens, including holding the chamber of prism subassembly in the interior of smooth machine shell, the prism subassembly includes fixed connection's first prism and second prism, DMD and camera lens are installed respectively in the outside of smooth machine shell; the second prism comprises a first corner far away from the first prism, a hard force transmission block and a first metal elastic piece are arranged at the first corner, and the hard force transmission block abuts against the first corner and is in contact with two side faces of the second prism at the first corner; one end of the first metal elastic piece is fixed outside the optical case, the other end of the first metal elastic piece penetrates through the optical case and abuts against the hard force transmission block, and two side faces, far away from the second prism, of the first prism respectively abut against the side walls of the accommodating cavity; the one end that first metal elastic component runs through the smooth casing is the bulb structure, the utility model discloses can make prism receive expend with heat and contract with cold's removal controllable, promote the formation of image uniformity of projection ray apparatus in the use.

Description

Projection optical machine and projector

Technical Field

The utility model relates to an optics field especially relates to a projection ray apparatus and projecting apparatus.

Background

The projection light machine is a core component of the projector, and the projection light machine of the portable projector comprises a main case, a light source, a lens, a DMD light modulator and a lens, and also comprises a beam splitter prism. The beam splitter prism is close to the DMD optical modulator, the DMD optical modulator generates a large amount of heat in the working process, in addition, the beam splitter prism can generate high heat in the working process of reflecting light, and the beam splitter prism can move along with the inevitable expansion and contraction caused by the change of the heat.

At present, when the prism is fixed, the silica gel column is adopted to compress the prism and the optical machine shell for installing the prism, but the silica gel column is aged after being used for a long time, so that the movement of the prism caused by thermal expansion and cold contraction is uncontrollable, and the imaging consistency of the projection optical machine is poor in the using process.

SUMMERY OF THE UTILITY MODEL

Based on above-mentioned current situation, take place ageing easily for solving the silica gel column, the prism receives expend with heat and contract with cold's removal uncontrollable, leads to the poor problem of formation of image uniformity of projection ray apparatus, the utility model discloses a main aim at provides a projection ray apparatus and projecting apparatus that the formation of image uniformity is good.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a projection optical machine, including light casing, prism subassembly, DMD and camera lens, the inside holding chamber that holds the prism subassembly that includes of light casing, the prism subassembly includes fixed connection's first prism and second prism, DMD with the camera lens is installed respectively in the outside of light casing;

the second prism comprises a first corner far away from the first prism, a hard force transmission block and a first metal elastic piece are arranged at the first corner, and the hard force transmission block abuts against the first corner and is in contact with two side faces of the second prism at the first corner; one end of the first metal elastic piece is fixed outside the optical enclosure, the other end of the first metal elastic piece penetrates through the optical enclosure and abuts against the hard force transmission block, and two side faces, far away from the second prism, of the first prism respectively abut against the side walls of the accommodating cavity;

one end of the first metal elastic piece penetrating through the optical case is of a ball head structure.

Preferably, the second prism includes a first side surface, a second side surface and a third side surface, the first side surface and the second side surface intersect to form the first corner, the first prism is fixed on the third side surface, and the first side surface is an incident surface;

the hard force transmission block comprises a first force transmission part and a second force transmission part, and the first force transmission part and the second force transmission part are respectively contacted with the first side surface and the second side surface; the length of the first force transmission part along the first extending direction of the side face is M, the length of the second force transmission part along the second extending direction of the side face is N, M: n =1: (3-6).

Preferably, the second force conducting part comprises a contact structure and an abutting structure, and the contact structure and the abutting structure are arranged at an included angle and fixedly connected;

the contact structure is fixedly bonded or contacted with the second side face, and one end of the metal elastic piece abuts against the abutting structure.

Preferably, contained angle between contact structure and the butt structure is first contained angle, side two with run through first metal elastic component contained angle between the lateral wall in chamber is the second contained angle, first contained angle with second contained angle is the same, stereoplasm power conduction piece is close to first metal elastic component's lateral surface with first metal elastic component is perpendicular.

Preferably, the hard force transmission block is a metal block, and the first metal elastic member is an elastic plunger.

Preferably, the accommodating cavity comprises a first side wall, a second side wall and a third side wall, a light inlet, a light outlet and a light inlet are respectively formed in the first side wall, the second side wall and the third side wall, two side faces of the first prism, which are far away from the second prism, are respectively abutted against the first side wall and the second side wall of the accommodating cavity, raised positioning points which are integrally formed with the optical machine shell are arranged on the first side wall and the second side wall, and two side faces of the first prism are abutted against the positioning points.

Preferably, the number of the positioning points on the first side wall is more than or equal to that on the second side wall;

the number of the positioning points on the first side wall is 3, and the number of the positioning points on the second side wall is 2.

Preferably, the accommodating cavity comprises a cavity top wall and a cavity bottom wall, one of the cavity top wall and the cavity bottom wall of the accommodating cavity is provided with a positioning point with a fixed position, the other one of the cavity top wall and the cavity bottom wall of the accommodating cavity is provided with a second metal elastic piece, the second metal elastic piece penetrates through the optical machine shell, one end of the second metal elastic piece abuts against the first prism, and the other end of the second metal elastic piece is fixed with the optical machine shell;

the second metal elastic piece is an elastic plunger.

Preferably, the second prism includes a first side, a second side and a third side, the first side and the second side intersect to form the first corner, and the first prism is fixed on the third side; the number of the positioning points is 1, the second metal elastic piece corresponds to the positioning points in the vertical direction, and the second metal elastic piece and the positioning points pass through the vertical plane of the third side face.

Preferably, the first prism includes a first incident surface, a second incident surface, an exit surface, a first supporting surface and a second supporting surface, the first supporting surface and the second supporting surface are connected through the first incident surface, the second incident surface and the exit surface which are perpendicular to the first supporting surface, the first sidewall and the second sidewall are respectively contacted with the second incident surface and the first incident surface through the positioning points one by one, the first supporting surface is above the second supporting surface, and the first supporting surface and the second supporting surface are both perpendicular to the second sidewall;

the 3 positioning points on the first side wall are respectively a first positioning point, a second positioning point and a third positioning point, the positions of the first positioning point, the second positioning point and the third positioning point, which are in contact with the second incident surface, are located on the edge of the second incident surface, the side length of the intersection line of the first supporting surface and the second incident surface is L, the first positioning point is arranged above the second positioning point and has the same distance with the intersection line of the emergent surface and the second incident surface, and the distance is 5/6L-1L; the third positioning point is arranged below the first side wall and has the same height as the second positioning point, and the distance from the third positioning point to the intersection line of the emergent surface and the second incident surface is 1/4L-3/5L;

the 2 positioning points on the second side wall are respectively a fourth positioning point and a fifth positioning point, the contact positions of the fourth positioning point and the fifth positioning point with the emergent surface are positioned on the edge of the emergent surface, the fourth positioning point is positioned above the fifth positioning point, the distances between the fourth positioning point and the fifth positioning point and the intersecting line of the first incident surface and the emergent surface are the same, the side lengths of the first supporting surface and the emergent surface are A, and the distances between the fourth positioning point and the fifth positioning point and the intersecting line of the first incident surface and the emergent surface are 4/5A-1A.

Preferably, the maximum size of the first positioning point, the second positioning point and the third positioning point is 1/6-1/3L, the maximum size of the fourth positioning point and the fifth positioning point is 1/6-1/3A, and the positioning points are circular or square.

Preferably, the first prism and the second prism are right-angle prisms, and the first corner is a right angle.

Preferably, the hard force-conducting block is a metal hard force-conducting block.

In order to better solve the above problem, the utility model also provides a projector, which comprises an outer shell, hold like foretell projection ray apparatus in the shell.

The utility model has the advantages that: the utility model provides a projection ray apparatus, the first corner department of having injectd the second prism in the prism subassembly is provided with stereoplasm power conduction block and first metal elastic component, two side contacts of stereoplasm power conduction block and first corner, and first metal elastic component one end produces an elasticity so that first prism is kept away from two sides of second prism are supported respectively and are leaned on the lateral wall that holds the chamber, and first metal elastic component, stereoplasm power conduction block can carry out the elasticity pressure to the prism subassembly and hold and spacing, make the prism subassembly expand with heat and contract with cold and can freely remove, and first metal elastic component and stereoplasm power conduction block, stereoplasm power conduction block and prism subassembly are the hard contact, and first metal elastic component and stereoplasm power conduction block are also difficult ageing, make the prism be controllable with the removal of expand with cold, promote the uniformity of formation of image in the use. The first metal elastic part penetrates through one end of the optical case and is of a ball head structure, the ball head structure can reduce the contact area of the first metal elastic part and the hard inner transmission block to reduce the friction force between the first metal elastic part and the hard inner transmission block, and the degree of freedom of movement of the prism assembly caused by expansion with heat and contraction with cold is further improved.

Other advantages of the present invention will be described in the detailed description, and those skilled in the art can understand the technical advantages brought by the technical features and technical solutions through the descriptions of the technical features and the technical solutions.

Drawings

A preferred embodiment of a projection optical machine according to the present invention will be described below with reference to the accompanying drawings.

In the figure:

fig. 1 is a schematic view of a three-dimensional structure of a projection light machine according to the present invention.

Fig. 2 is a schematic cross-sectional view of a projection optical machine showing a DMD according to the present invention.

Fig. 3 is a schematic view of a partial structure of a housing cavity for displaying a projection light machine according to the present invention.

Fig. 4 is a schematic partial cross-sectional view of a projection optical machine according to the present invention showing a top wall of a cavity.

Fig. 5 is an exploded schematic view of a prism assembly of a projection optical machine according to the present invention.

Fig. 6 is a schematic structural diagram of a hard force transmission block of a projection optical machine according to the present invention.

Fig. 7 is an enlarged schematic view of a portion a of fig. 2.

Fig. 8 is a schematic structural diagram of a first metal elastic component of a projection optical machine according to the present invention.

Description of the drawings: 1. an optical chassis; 11. an accommodating chamber; 111. a first side wall; 1111. a light-through port; 1112. a first anchor site; 1113. a second positioning point; 1114. a third positioning point; 112. a second side wall; 1121. a light outlet; 1122. a fourth positioning point; 1123. a fifth positioning point; 113. a third side wall; 1131. a light inlet; 114. a chamber top wall; 1141. a second metal elastic member; 115. a cavity bottom wall; 2. DMD; 3. a lens; 4. a prism assembly; 41. a first prism; 411. a first support surface; 412. a second support surface; 413. A first incident surface; 414. a second incident surface; 415. an exit surface; 42. a second prism; 421. a first side surface; 422. a second side surface; 423. side III; 424. a first corner; 5. a hard force transmission block; 51. a first force transmitting portion; 52. a second force transmitting portion; 521. a contact structure; 522. an abutting structure; 53. an outer side surface; 6. a first metal elastic member; 61. a fixed part; 62. a connecting portion; 63. a penetration portion; 631. a ball head structure.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth, such that well-known methods, procedures, flows, and components have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

The utility model provides a projection ray apparatus, includes light casing, prism subassembly, DMD and camera lens, light casing is inside including holding the chamber that holds of prism subassembly, the prism subassembly includes fixed connection's first prism and second prism, DMD with the camera lens is installed respectively the outside of light casing.

The second prism comprises a first corner far away from the first prism, a hard force transmission block and a first metal elastic piece are arranged at the first corner, and the hard force transmission block abuts against the first corner and is in contact with two side faces of the second prism at the first corner; one end of the first metal elastic piece is fixed outside the optical case, the other end of the first metal elastic piece penetrates through the optical case and abuts against the hard force transmission block, and two side faces, far away from the second prism, of the first prism abut against the side wall of the accommodating cavity respectively.

Referring to fig. 1 and 2, the utility model provides a projection ray apparatus, including light casing 1, DMD2, camera lens 3, prism subassembly 4, stereoplasm power conduction block 5, first metal elastic component 6, DMD2 and camera lens 3 are fixed in on the light casing 1, prism subassembly 4 sets up in light casing 1, stereoplasm power conduction block 5 sets up in light casing 1 and contacts with prism subassembly 4, outside first metal elastic component 6 one end was fixed in light casing 1, the other end runs through light casing 1 and supports on stereoplasm power conduction block 5. The optical case 1 can bear the DMD2 and the lens 3, and protects the prism assembly 4, so that the prism assembly is not easily damaged, the elastic force generated by the first metal elastic piece 6 is applied to the hard force transmission block 5 to push and press the prism assembly 4, the prism assembly 4 in the optical case 1 is positioned, and the free movement of the prism assembly 4 under the conditions of expansion with heat and contraction with cold is met.

Referring to fig. 3 and 4, the interior of the light housing 1 includes a receiving cavity 11 for receiving the prism assembly 4, and the inner walls of the receiving cavity 11 include a first side wall 111, a second side wall 112, a third side wall 113, a cavity bottom wall 115 and a cavity top wall 114. The first side wall 111, the second side wall 112 and the third side wall 113 are respectively provided with a light inlet 1111, a light outlet 1121 and a light inlet 1131, the dmd2 and the lens 3 are respectively installed at the outer side of the optical housing 1 and the positions of the lens correspond to the light inlet 1111 and the light outlet 1121. Light emitted by the light source is emitted into the accommodating cavity 11 through the light inlet 1131, refracted/reflected by the prism assembly 4, transmitted to the DMD2 through the light passing port 1111 for processing, and transmitted to the lens 3 through the light outlet 1121 after processing.

As an example, the light passing port 1111, the light outlet port 1121, and the light inlet port 1131 do not necessarily start on the first side wall 111, the second side wall 112, and the third side wall 113, and it can be understood that the position change of the DMD2, the lens 3, and the light entering the accommodating cavity 11 changes the relative positions of the light passing port 1111, the light outlet port 1121, and the light inlet port 1131.

In one embodiment, the first sidewall 111 and the second sidewall 112 are at an angle of 90 °. It will be appreciated that the angle between the first and

second sidewalls

111 and 112 will vary according to the shape of the prism assembly 4, and if the prism assembly 4 has a non-right angle with respect to the first and

second sidewalls

111 and 112, the first and

second sidewalls

111 and 112 will also vary to fit the prism assembly 4.

As an embodiment, positioning points are arranged in the accommodating cavity 11, and the prism assembly 4 is in contact with the side wall of the accommodating cavity 11 through the positioning points. All be provided with on first lateral wall 111 and the second lateral wall 112 with ray apparatus shell 1 integrated into one piece, bellied setpoint, a plurality of setpoints cooperate first metal elastic component 6 and hard power conduction piece 5, can fix a position prism subassembly 4 to satisfy the free movement under the prism subassembly 4 expend with heat and contract with cold.

As an embodiment, one of the top wall 114 and the bottom wall 115 of the accommodating cavity 11 is provided with a fixed positioning point, the other is provided with a second metal elastic member 1141, and the plurality of positioning points are matched with the first metal elastic member 6, the hard force transmission block 5 and the second metal elastic member 1141, so that the prism assembly 4 can be positioned in all directions, and the free movement of the prism assembly 4 under the conditions of thermal expansion and cold contraction is satisfied.

As an embodiment, the prism assembly 4 can directly contact with the first side wall 111, the second side wall 112, the chamber top wall 114 and the chamber bottom wall 115 in the accommodating chamber 11, and the positioning points are set, so that the friction force between the prism assembly 4 and the accommodating chamber 11 can be reduced, the prism assembly 4 can be moved by thermal expansion and contraction more conveniently, and the positioning is more accurate.

As an example, the first metal elastic member 6 and the second metal elastic member 1141 are both elastic plungers, or one of the first metal elastic member 6 and the second metal elastic member 1141 is an elastic plunger, which can provide a movable margin in some directions for the positioned prism assembly 4, it can be understood that the number and distribution of the elastic plungers can be selected according to specific assembly requirements or the size of the accommodating cavity 11.

Referring to fig. 5, the prism assembly 4 includes a first prism 41 and a second prism 42 fixedly connected, and the first prism 41 is far away from the light inlet 1131 relative to the second prism 42. The first prism 41 includes a first incident surface 413, a second incident surface 414, an exit surface 415, a first supporting surface 411 and a second supporting surface 412, the first supporting surface 411 and the second supporting surface 412 are connected by the first incident surface 413, the second incident surface 414 and the exit surface 415 perpendicular to the second supporting surface 412, the first supporting surface 411 is disposed close to the chamber top wall 114 with respect to the second supporting surface 412, and the first supporting surface 411 and the second supporting surface 412 are perpendicular to the second side wall 112. The second prism 42 includes a first side 421, a second side 422, a third side 423, and a first corner 424 formed by the intersection of the first side 421 and the second side 422, the first prism 41 is fixed on the third side 423, and the first side 421 is an incident plane. The first prism 41 and the second prism 42 are both right-angle prisms, and the first rotation angle 424 is a right angle. When the prism assembly 4 is positioned, the hard force transmission block 5 abuts against the first rotation angle 424 and contacts with two side surfaces of the first rotation angle 424, the first metal elastic part 6 generates an elastic force to enable the second incident surface 414 and the exit surface 415 to abut against the first side wall 111 and the second side wall 112 respectively, so that the prism assembly 4 is positioned, and the first metal elastic part 6 has elasticity and can allow the prism assembly 4 to move by heat expansion and cold contraction.

As an example, the first corner 424 and the angle of the first prism 41 away from the second prism 42 may be changed according to the requirements of the specific light propagation path and the shape of the accommodating cavity 11.

The first side wall 111 and the second side wall 112 are respectively contacted with the second incident surface 414 and the exit surface 415 through positioning points one by one, the cavity bottom wall 115 and the cavity top wall 114 are respectively contacted with the second supporting surface 412 and the first supporting surface 411 through the positioning points and the second metal elastic member 1141, the number of the positioning points on the first side wall 111 is more than that on the second side wall 112, because the first side wall 111 is the side wall which accommodates the cavity 11 corresponding to the light-through port 1111 and the DMD2, the positioning requirement between the prism assembly 4 and the DMD2 is the highest, and the positioning precision requirement between the lens 3 is the second, the relative position between the prism assembly 4 and the DMD2 needs to be accurately positioned when the prism assembly 4 is set, so that more positioning point precision positioning prism assemblies 4 are arranged on the first side wall 111. As a specific example, the number of the positioning points on the first side wall 111 is 3, the number of the positioning points on the second side wall 112 is 2, and the number of the positioning points with fixed positions arranged on the top wall 114 or the bottom wall 115 of the accommodating cavity 11 is 1.

The 3 positioning points on the first sidewall 111 are respectively a first positioning point 1112, a second positioning point 1113 and a third positioning point 1114, the positions where the first positioning point 1112, the second positioning point 1113 and the third positioning point 1114 contact the second incident surface 414 are located at the edge of the second incident surface 414, the side length of the intersection line of the first supporting surface 411 and the second incident surface 414 is L, the first positioning point 1112 is arranged above the second positioning point 1113 and has the same distance with the intersection line a (refer to fig. 5) of the exit surface 415 and the second incident surface 414, and the distance is 5/6L-1L; the third positioning point 1114 is disposed under the first sidewall 111 at the same height as the second positioning point 1113, and is spaced apart from the intersection line a of the exit plane 415 and the second incident plane 414 by a distance of 1/4L to 3/5L. The 2 positioning points on the second side wall 112 are a fourth positioning point 1122 and a fifth positioning point 1123, the contact positions of the fourth positioning point 1122 and the fifth positioning point 1123 with the exit surface 415 are located on the edge of the exit surface 415, the fourth positioning point 1122 is located above the fifth positioning point 1123, the intersection line b (refer to fig. 5) of the fourth positioning point 1122 and the fifth positioning point 1123 with the first incident surface 413 and the exit surface 415 is at the same distance, the side length of the first supporting surface 411 and the exit surface 415 is a, and the distance from the intersection line b of the first incident surface 413 and the exit surface 415 to the fourth positioning point 1122 and the fifth positioning point 1123 is 4/5A-1A. The second metal elastic element 1141 corresponds to the positioning point in the vertical direction, and both pass through the perpendicular plane of the side surface three 423.

As an example, the maximum size of the first positioning point 1112, the second positioning point 1113 and the third positioning point 1114 is 1/6L-1/3L, the maximum size of the fourth positioning point 1122 and the fifth positioning point 1123 is 1/6A-1/3A, and the positioning points may be circles or squares or other regular or irregular shapes. Since the light beam always enters the DMD2 through the first prism 41 and also enters the lens 3 through the first prism 41, the positioning of the prism assembly 4 is referenced to the position of the first prism 41, and the positioning points are arranged in the accommodating cavity 11 in the above-mentioned number and distribution positions, so as to meet the positioning accuracy requirement of the prism assembly 4 in each direction.

As an embodiment, the distribution of the first positioning point 1112, the second positioning point 1113, the third positioning point 1114, the fourth positioning point 1122, the fifth positioning point 1123, the positioning point of the cavity top wall 114 and the positioning point of the cavity bottom wall 115 does not have to be the distribution positions, for example, the distance between the intersection line of the first positioning point 1112 and the second positioning point 1113 and the intersection line of the exit surface 415 and the second incident surface 414 is different, and the prism assembly 4 can be positioned, and the positioning effect of the first prism 41 can be improved by adopting the distribution positions of the first positioning point 1112, the second positioning point 1113, the third positioning point 1114, the fourth positioning point 1122, the fifth positioning point 1123, the positioning point of the first supporting surface 411 and the positioning point of the second supporting surface 412, so as to position the prism assembly 4 more accurately.

As an example, the size of the anchor point is not necessarily within the above range. It will be appreciated that the maximum size of the anchor point will vary with the size of the first prism 41.

As an example, the shape of the anchor point is not limited, and the anchor point may be a triangle, an ellipse, and is not limited thereto.

Referring to fig. 2 and 6, the hard force transmission block 5 is a metal hard force transmission block 5. As an embodiment, the hard force transmission block 5 includes a first force transmission part 51 and a second force transmission part 52, and the first force transmission part 51 and the second force transmission part 52 are respectively in contact with the first side 421 and the second side 422. The second force transmitting part 52 comprises a contact structure 521 and an abutting structure 522, the contact structure 521 and the abutting structure 522 are arranged at an included angle and fixedly connected, the contact structure 521 is fixedly adhered to or contacted with the second side surface 422, one end of the first metal elastic member 6 abuts against the abutting structure 522, the outer side surface 53 of the hard force transmitting block 5 close to the first metal elastic member 6 is perpendicular to the first metal elastic member 6, one end of the first metal elastic member 6 applies elastic force to the hard force transmitting block 5, the hard force transmitting block 5 decomposes the elastic force into component forces parallel to the extending directions of the first side surface 421 and the second side surface 422, the hard force transmitting block 5 and the prism assembly 4 are relatively fixed through adhesion, so that the decomposed elastic force is applied to the prism assembly 4 to perform more stable positioning on the prism assembly 4, the contact between the first metal elastic member 6 and the hard force transmitting block 5 is hard contact, the hard force transmitting block 5 and the prism assembly 4 are also hard contact, the movement repeatability of the prism assembly 4 can be improved, namely, when the prism movement is consistent with cold shrinkage when the prism occurs in different times.

In one embodiment, the hard force transmission block 5 may be made of hard metal, or may be made of hard non-metal with smooth surface, such as ceramic, tempered glass, etc., all of which can satisfy the hard contact between the hard force transmission block 5 and the first metal elastic member 6 and the prism assembly 4, respectively. Preferably a metal force conducting block is used.

As an embodiment, a length of the first force conducting portion 51 along the extending direction of the first side 421 is M, a length of the second force conducting portion 52 along the extending direction of the second side 422 is N, M: n =1: (3-6), according to the position of prism subassembly 4, light need pass through side one 421 and spread into prism subassembly 4, and light does not propagate through side two 422, carries out light transmission in order not to shelter from side one 421, can guarantee the conduction function of stereoplasm power conduction piece 5 again, so set up the ratio of M and N to above-mentioned scope, M is less than N promptly to this does not shelter from side one 421 and carries out light transmission, can also satisfy the location of stereoplasm power conduction piece 5 to prism subassembly 4. It will be appreciated that the ratio of M to N is not necessarily in the above range and will vary as the clear side of the prism assembly 4 varies.

As an embodiment, an included angle between the contact structure 521 and the abutting structure 522 is a first included angle α (see fig. 7), an included angle between the second side surface 422 and a side wall of the accommodating cavity 11 penetrating through the first metal elastic member 6 is a second included angle β (see fig. 7), and the first included angle α and the second included angle β are the same, so that the elastic force transmitted from the first metal elastic member 6 to the hard force transmission block 5 is more uniformly distributed on the prism assembly 4.

As an embodiment, the first included angle α is 20 ° to 70 °, and it is understood that the angle of the first included angle α is adjustable as long as the contact structure 521 is secured to or contacted with the second side surface 422 in an adhesion manner, and one end of the first metal elastic element 6 extending into the accommodating cavity 11 is disposed perpendicular to the outer side surface 53.

As an embodiment, the outer side 53 of the hard force transmission block 5 close to the first metal elastic component 6 does not need to be strictly perpendicular to the first metal elastic component 6, and the angle between the outer side 53 of the hard force transmission block 5 close to the first metal elastic component 6 and the first metal elastic component 6 can be vertically changed by 90 °, just that the outer side 53 of the hard force transmission block 5 close to the first metal elastic component 6 is perpendicular to the first metal elastic component 6, so that the force applied by the first metal elastic component 6 to the hard force transmission block 5 can be better resolved, and the prism assembly 4 can be positioned more stably.

Referring to fig. 2 and 8, the first metal elastic component 6 includes a penetrating portion 63, a connecting portion 62 and a fixing portion 61, the fixing portion 61 and the penetrating portion 63 are connected through the connecting portion 62, the fixing portion 61 is located outside the optical housing 1, the connecting portion 62 is used for being connected with the optical housing 1, the fixing portion 61 can abut against the optical housing 1 to fix the positions of the first metal elastic component 6 and the optical housing 1, one end of the penetrating portion 63 is connected with the connecting portion 62, and the other end penetrates through the optical housing 1 to abut against the hard force transmission block 5 to apply a certain elastic force to the hard force transmission block 5, on one hand, the prism assembly 4 is positioned, and on the other hand, the prism assembly 4 is guaranteed to be capable of moving freely due to thermal expansion and cold contraction.

As an embodiment, the position of the first metal elastic element 6 outside the optical chassis 1 may vary according to the structure of the first metal elastic element 6, for example, the end of the penetrating portion 63 and the connecting portion 62 away from the hard force conducting block 5 extend to the end of the fixing portion 61 away from the force conducting block 5, and the penetrating portion 63, the connecting portion 62 and the fixing portion 61 are outside the optical chassis 1.

As an embodiment, the first metal elastic element 6 penetrates through the optical housing 1 and has a ball head structure 631 at one end. The ball head structure 631 can reduce the contact area between the first metal elastic part 6 and the hard force conducting block 5, reduce the friction force between the two, and facilitate the smooth degree of the prism assembly 4 moving due to thermal expansion and cold contraction.

As an example, during the process of installing the first metal elastic member 6, the elastic force applied to the hard force transmission block 5 by the penetration part 63 can be adjusted according to the elastic force required for positioning the prism assembly 4. For example, the connecting portion 62 with a screw structure is connected to the optical chassis 1 to adjust the elastic force applied to the hard force transmission block 5 by the first metal elastic member 6.

In a second aspect, the present application further provides a projector, which includes a housing, and the housing accommodates the above-mentioned projector light engine. Adopt above-mentioned projection ray apparatus, elastic metal spare, stereoplasm power conducting block and a plurality of setpoint cooperation can fix a position prism subassembly to when prism subassembly is heated and removes, elastic metal spare and stereoplasm power conducting block can satisfy prism subassembly free movement, and the setpoint also can reduce prism subassembly and hold the area of contact between the chamber. Because the first elastic metal piece and the hard force transmission block, the hard force transmission block and the prism assembly, the prism assembly and each positioning point are in hard contact, the prism assembly has better consistency when being subjected to expansion caused by heat and contraction caused by cold.

It will be appreciated by those skilled in the art that the various preferences described above can be freely combined, superimposed without conflict.

It should be understood that the above-described embodiments are illustrative only and not restrictive, and that various obvious or equivalent modifications and substitutions may be made by those skilled in the art without departing from the basic principles of the invention, and are intended to be included within the scope of the appended claims.

Claims

1. A projection optical machine comprises an optical machine shell, a prism assembly, a DMD (digital micromirror device) and a lens, wherein the optical machine shell internally comprises an accommodating cavity for accommodating the prism assembly, the prism assembly comprises a first prism and a second prism which are fixedly connected, and the DMD and the lens are respectively arranged on the outer side of the optical machine shell; the method is characterized in that:

2. The light engine of claim 1, wherein: the second prism comprises a first side face, a second side face and a third side face, the first side face and the second side face are intersected to form the first corner, the first prism is fixed on the third side face, and the first side face is an incident face;

3. The light engine of claim 2, wherein: the second force conduction part comprises a contact structure and an abutting structure, and the contact structure and the abutting structure are arranged at an included angle and fixedly connected;

4. The light engine of claim 3, wherein: the contained angle between contact structure and the butt structure is first contained angle, side two with run through first metal elastic component contained angle between the lateral wall that holds the chamber is the second contained angle, first contained angle with second contained angle is the same, stereoplasm power conduction piece is close to first metal elastic component's lateral surface with first metal elastic component is perpendicular.

5. The light engine of claim 1, wherein: the hard force transmission block is a metal block, and the first metal elastic piece is an elastic plunger.

6. The projection light engine of claim 1, wherein: hold the chamber and include first lateral wall, second lateral wall and third lateral wall, logical light mouth, light-emitting window and income light mouth have been seted up on first lateral wall, second lateral wall and the third lateral wall respectively, first prism is kept away from two sides of second prism support respectively and lean on hold the chamber first lateral wall with on the second lateral wall, first lateral wall with be provided with on the second lateral wall with ray apparatus shell integrated into one piece, bellied setpoint, two sides of first prism support and lean on the setpoint.

7. The light engine of claim 6, wherein: the number of the positioning points on the first side wall is more than or equal to that on the second side wall;

8. The light engine of claim 1, wherein: the accommodating cavity comprises a cavity top wall and a cavity bottom wall, one of the cavity top wall and the cavity bottom wall of the accommodating cavity is provided with a positioning point with a fixed position, the other one of the cavity top wall and the cavity bottom wall of the accommodating cavity is provided with a second metal elastic piece, the second metal elastic piece penetrates through the optical machine shell, one end of the second metal elastic piece is abutted against the first prism, and the other end of the second metal elastic piece is fixed with the optical machine shell;

the second metal elastic piece is an elastic plunger.

9. The light engine of claim 8, wherein: the second prism comprises a first side face, a second side face and a third side face, the first side face and the second side face are intersected to form the first corner, and the first prism is fixed on the third side face;

the number of the positioning points is 1, the second metal elastic piece corresponds to the positioning points in the vertical direction, and the second metal elastic piece and the positioning points pass through the vertical plane of the third side face.

10. The projection light engine of claim 7, wherein: the first prism comprises a first incident surface, a second incident surface, an emergent surface, a first supporting surface and a second supporting surface, the first supporting surface and the second supporting surface are connected through the first incident surface, the second incident surface and the emergent surface which are perpendicular to the first supporting surface, the first side wall and the second side wall are respectively contacted with the second incident surface and the first incident surface one by one through the positioning points, the first supporting surface is arranged above the second supporting surface, and the first supporting surface and the second supporting surface are both perpendicular to the second side wall;

the 3 positioning points on the first side wall are respectively a first positioning point, a second positioning point and a third positioning point, the positions of the first positioning point, the second positioning point and the third positioning point, which are in contact with the second incident surface, are located on the edge of the second incident surface, the side length of the intersection line of the first supporting surface and the second incident surface is L, the first positioning point is arranged above the second positioning point and has the same distance with the intersection line of the emergent surface and the second incident surface, and the distance is 5/6L-1L; the third positioning point is arranged below the first side wall and has the same height as the second positioning point, and the distance from the intersection line of the emergent surface and the second incident surface is 1/4L-3/5L;

the 2 positioning points on the second side wall are respectively a fourth positioning point and a fifth positioning point, the contact positions of the fourth positioning point and the fifth positioning point with the emergent surface are positioned on the edge of the emergent surface, the fourth positioning point is positioned above the fifth positioning point, the distances between the fourth positioning point and the fifth positioning point and the intersection line of the first incident surface and the emergent surface are the same, the side lengths of the first supporting surface and the emergent surface are A, and the distances between the fourth positioning point and the fifth positioning point and the intersection line of the first incident surface and the emergent surface are 4/5A-1A.

11. The projection light engine of claim 10, wherein: the maximum size of the first positioning point, the second positioning point and the third positioning point is 1/6-1/3L, the maximum size of the fourth positioning point and the fifth positioning point is 1/6-1/3A, and the positioning points are circular or square.

12. The light engine of claim 1, wherein: the first prism and the second prism are right-angle prisms, and the first corner is a right angle.

13. The light engine of claim 1, wherein: the hard force transmission block is a metal hard force transmission block.

14. A projector, comprising a housing, characterized in that: the housing contains the light engine of claims 1-13 therein.