CN219065974U - Projection ray apparatus and projection equipment - Google Patents

Abstract

The utility model provides a projection optical engine, which comprises a shell, a DMD (digital micromirror device), a heat conducting piece, a compressing piece, a circuit board and a radiator, wherein the DMD, the heat conducting piece, the compressing piece, the circuit board and the radiator are sequentially stacked; the DMD is fixed on the shell, and the circuit board is electrically connected with the DMD; the radiator comprises radiating fins, a base body and a heat transfer part, wherein the radiating fins are integrally formed on the surface, away from the circuit board, of the radiator, the heat transfer part is arranged on the edge part, close to the surface of the circuit board, of the base body and protrudes towards the direction where the DMD is located, the heat transfer part is close to the surface of the DMD, is contacted with the surface, away from the DMD, of the pressing part, and a heat transmission channel is formed among the DMD, the heat conduction part, the pressing part and the radiator. The utility model also provides the projection equipment comprising the projection optical machine, and the projection optical machine and the projection equipment have the advantages of good heat dissipation effect and the like.

Description

Projection ray apparatus and projection equipment

Technical Field

The present utility model relates to the field of projection devices, and in particular, to a projection light machine and a projection device.

Background

Projection equipment is widely used as office equipment in different occasions such as teaching, scientific research, meeting, reporting and the like. The market share is a digital light processing projector which adopts a digital micromirror device DMD as an imaging device, and has the characteristics of high primary contrast, machine miniaturization, closed light path and the like. The DMD, which is a core component of a digital light processing projector, is a projection technique for projecting an image by adjusting reflected light. It differs significantly from a liquid crystal projector in that its imaging is achieved by reflecting light through thousands of tiny mirrors. The DMD is easy to generate heat in the working process, and if the heat generated by the DMD cannot be dissipated, the working quality and the service life of the projection equipment are affected. Therefore, a reasonably designed heat dissipation structure is important for projection devices.

Disclosure of Invention

In view of the above-mentioned situation, a primary object of the present utility model is to provide a projection optical engine and a projection apparatus.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the projection optical machine comprises a shell, a DMD, a heat conducting piece, a pressing piece, a circuit board and a radiator, wherein the DMD, the heat conducting piece, the pressing piece, the circuit board and the radiator are sequentially stacked; the DMD is fixed on the shell, and the circuit board is electrically connected with the DMD; the radiator comprises radiating fins, a base body and a heat transfer part, wherein the radiating fins are integrally formed on the surface, away from the circuit board, of the base body, the heat transfer part is arranged on the edge part, close to the surface of the circuit board, of the base body and protrudes towards the direction where the DMD is located, the heat transfer part is close to the surface of the DMD and is contacted with the surface, away from the DMD, of the pressing part, and a heat transmission channel is formed among the DMD, the heat conduction part, the pressing part and the radiator.

Preferably, a first connector is arranged on one side of the DMD, which is close to the pressing piece; a second connector is arranged on one side, close to the DMD, of the circuit board, and a first skylight is arranged on the pressing piece so that the first connector can be plugged with the second connector to realize electrical connection between the circuit board and the DMD; the plurality of heat transfer channels is circumferentially distributed around the first and second connectors.

Preferably, the heat transfer portion includes a protrusion and/or a rib disposed at least in two orientations of the circuit board.

Preferably, the heat transfer part comprises a raised line arranged along the bottom of the base body and a raised column arranged along the top of the base body, and a fixing hole for fixing the radiator on the shell is arranged between the raised column and the raised line; the bottom of the circuit board is borne on the raised strips, and the top of the circuit board extends out from between the two raised columns and is higher than the top of the radiator.

Preferably, a sealing member is arranged between the circuit board and the pressing member, and a buffer member for buffering is arranged between the circuit board and the radiator; and a positioning groove is formed in the surface, close to the circuit board, of the base body, and the positioning groove is matched with the heat transfer part to form a positioning part for positioning the buffer piece.

Preferably, the pressing member is provided with a reinforcing portion protruding toward the DMD around the first antenna.

Preferably, a containing cavity is formed in the shell, the DMD is contained in the containing cavity, and the pressing piece presses the DMD on the shell through pressing the heat conducting piece.

Preferably, the accommodating cavity comprises a first accommodating cavity and a second accommodating cavity which are communicated, the second accommodating cavity is arranged around the first accommodating cavity, the DMD is accommodated in the first accommodating cavity, one part of the heat conducting piece is accommodated in the first accommodating cavity, the other part of the heat conducting piece is accommodated in the second accommodating cavity, and the surface of the heat conducting piece away from the pressing piece is contacted with the inner wall of the second accommodating cavity away from the pressing piece and the surface of the DMD close to the pressing piece; the reinforcing part stretches into the first accommodating cavity and the second accommodating cavity and compresses the DMD in the shell through the heat conducting piece.

Preferably, the top of the pressing piece is provided with a bending part formed by bending, and the bending part covers the top surface of the shell; the compressing piece is provided with a through hole at a position close to the bending part, and the shell is provided with a limiting column corresponding to the through hole.

Preferably, the compressing piece is fixedly connected with the shell through a first fixing structure; the radiator is fixedly connected with the shell through a second fixing structure.

Preferably, the side surface of the second fixing structure forms a limiting structure, and the edge of one or more of the DMD, the heat conducting piece and the compressing piece is provided with a notch, and the notch is matched with the limiting structure in shape to realize limiting.

The utility model also provides projection equipment comprising the projection optical machine.

According to the utility model, the circuit board of the projection optical machine is electrically connected with the DMD, the heat conducting piece is arranged on one side of the DMD, the compressing piece is arranged between the DMD and the circuit board, the radiator is in contact with the compressing piece, and the heat transmission channel is formed among the DMD, the heat conducting piece, the compressing piece and the radiator, so that the heat dissipation mode is direct and simple, the heat of the DMD can be effectively transmitted, the temperature of the DMD in the working process is reduced, and the working performance of the DMD is prevented from being influenced by the heat concentration.

The projection device provided by the utility model has the advantages.

Other advantages of the present utility model will be set forth in the description of specific technical features and solutions, by which those skilled in the art should understand the advantages that the technical features and solutions bring.

Drawings

Hereinafter, preferred embodiments of a projector and a projection apparatus according to the present utility model will be described with reference to the accompanying drawings. In the figure:

fig. 1 is a schematic perspective view of a projection apparatus according to the present utility model.

Fig. 2 is a schematic perspective view of a projection apparatus according to the present utility model at another view angle.

Fig. 3 is a schematic diagram of an exploded structure of the projection device of the present utility model.

Fig. 4 is a schematic perspective view of the projection device of the present utility model with the DMD assembly removed.

Fig. 5 is a schematic diagram of a front view of a projection device with DMD components removed.

Fig. 6 is a schematic perspective view of the DMD in the projection device of the present utility model.

Fig. 7 is a schematic perspective view of a heat conducting member in the projection apparatus of the present utility model.

Fig. 8 is a schematic front view of a heat conducting member in a projection apparatus according to the present utility model.

Fig. 9 is a schematic perspective view of a compressing member in the projection apparatus of the present utility model.

Fig. 10 is a schematic perspective view of a compressing member in a projection apparatus according to the present utility model at another view angle.

Fig. 11 is a schematic perspective view of a seal in a projection apparatus according to the present utility model.

Fig. 12 is a schematic perspective view of a circuit board in the projection device of the present utility model.

Fig. 13 is a schematic diagram showing a front view of a circuit board in the projection device of the present utility model.

Fig. 14 is a schematic perspective view of a radiator in the projection apparatus of the present utility model.

Fig. 15 is a schematic perspective view of a radiator in another view of the projection apparatus according to the present utility model.

Detailed Description

The present utility model is described below based on examples, but the present utility model is not limited to only these examples. In the following detailed description of the present utility model, certain specific details are set forth in order to avoid obscuring the present utility model, and in order to avoid obscuring the present utility model, well-known methods, procedures, flows, and components are not presented in detail.

Moreover, those of ordinary skill in the art will appreciate that the drawings are provided herein for illustrative purposes and that the drawings 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, it is the meaning of "including but not limited to".

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

Referring to fig. 1 and 2, the present utility model provides a projector 100 for projecting an image on a projection surface such as a curtain or a wall. The projection optical machine comprises a DMD assembly 10, a shell 20, a light source module 30, an optical adjusting module (not numbered) block and a lens module 40, wherein the DMD assembly 10, the light source module 30 and the lens module 40 are all arranged in three different orientations of the shell 20, and the optical adjusting module is arranged in the shell 20. The light source module 30 includes one or more of red light source, blue light source, green light source, collimator lens, converging lens and beam splitter. The optical adjustment module includes optical elements including, but not limited to, one or more of fly-eye lenses, relay lenses, or prisms. The lens module 40 may be provided with an optical element for optical processing. The light emitted by the light source module 30 is optically adjusted by the optical adjustment module, imaged by the DMD assembly 10, and projected onto the projection surface from the lens module 40.

Referring to fig. 3, the DMD assembly 10 is mounted on one side of the housing 20, the DMD assembly 10 includes a DMD12, a heat conducting member 13, a pressing member 14, a sealing member 15, a circuit board 16, a buffer member 17 and a heat sink 18, which are stacked in this order from the direction approaching the housing 20 to the direction separating from the housing 20, and the DMD12 is fixed on the housing 20. For convenience of description, the direction in which the elements of DMD assembly 10 are arranged (from near housing 20 to far housing 20) is defined as the X direction.

Referring to fig. 4 and 5, the housing 20 is provided with a receiving chamber, and specifically includes a first receiving chamber 21 and a second receiving chamber 22 that are communicated with each other, the second receiving chamber 22 being disposed around the first receiving chamber 21, and a depth (in the X direction) of the first receiving chamber 21 being greater than a depth of the second receiving chamber 22. The shape and size of the outline of the first accommodation chamber 21 are matched with those of the DMD12, and the DMD12 is accommodated in the first accommodation chamber 21. The heat conductive member 13 is located in the second accommodation chamber 22 and the outer peripheral shape of the heat conductive member 13 is sized to match the size and shape of the outline of the second accommodation chamber 22, and a part of the heat conductive member 13 is accommodated in the first accommodation chamber 21 and another part is accommodated in the second accommodation chamber 22. When the DMD12 is accommodated in the first accommodation chamber 21, the surface of the DMD12 close to the pressing member 14 and the surface of the second accommodation chamber 22 away from the inner wall a of the pressing member 14 are flush, and the surface of the heat conductive member 13 away from the pressing member 14 is in contact with the surface of the second accommodation chamber away from the inner wall a of the pressing member 14 and the DMD12 close to the pressing member 14. The thickness of the heat conducting member 13 is smaller than the depth of the second accommodation chamber 22 in the X direction, i.e., the surface of the heat conducting member 13 near the pressing member 14 is at a distance from the surface B of the housing 20. As a variant, the surface of the heat-conducting member 13 adjacent to the pressure-conducting member 13 is flush with the surface B of the housing 20 or bulges in the direction of the pressure-conducting member 14 with respect to the surface B, the DMD12 being accommodated in the accommodation chamber, the pressure-conducting member 13 being pressed by the pressure-conducting member 14 and thereby the DMD12 against the housing 20.

With continued reference to fig. 4 and 5, the surface B of the housing 20 is provided with a limiting post 23, a fixing post 24 and a screw hole 25, wherein the limiting post 23 can prevent the DMD12 from being electrically connected unstably due to the inclination of the circuit board 16, i.e. the circuit board 16 will abut against the limiting post 23 when inclined, thereby further preventing the circuit board 16 from falling out and affecting the electrical connection. Specifically, the number of the limiting posts 23 in the illustrated embodiment is 2, and it is understood that the number of the limiting posts 23 is 2 or more, and the specific number is not specifically limited. The number of the fixing columns 24 is 2, the fixing columns 24 are respectively arranged on two opposite sides of the second accommodating cavity 22, the fixing columns 24 are provided with mounting holes 241, and opposite sides of the two fixing columns 24 are simultaneously used as side walls of the first accommodating cavity 21 and the second accommodating cavity 22. The number of screw holes 25 is 2, and they are provided on opposite corners of the second accommodation chamber 22, respectively. It can be understood that the number of the fixing posts 24 and screw holes can be more than two, preferably 2, so that the mounting stability is ensured, and the mounting convenience is also considered.

Referring to fig. 6, a first connector 19a is installed on the surface of the DMD12, two opposite ends of the first connector are provided with first notches 121, and the shape and size and the setting position of the first notches 121 correspond to the outer side surfaces of the fixing columns 24, so that when the DMD12 is accommodated in the first accommodating cavity 21, parts of the two fixing columns 24 are just located in the first notches 121, and the DMD12 is limited by matching the first notches 121 with the fixing columns 24.

Referring to fig. 7 and 8, a first louver 131 is disposed in the center of the heat conducting member 13, that is, the heat conducting member 13 is an annular body, and the first louver 131 is provided for the first connector 19a mounted on the DMD12 to pass through. The outer periphery of the heat conducting member 13 has the same shape and size as the outline of the second accommodating chamber 22, and when the heat conducting member 13 is accommodated in the second accommodating chamber 22, the surface thereof also covers the surface of the DMD12, facilitating the sealing of the DMD 12. The heat conducting member 13 may be made of rubber, silica gel, or other materials, preferably rubber or other soft heat conducting materials, so that the heat conducting member 13 has good heat conducting function and good sealing performance, and is beneficial to heat dissipation and sealing of the DMD 12.

The two opposite ends of the heat conducting piece 13 are provided with second notches 132, and the shape and size and the setting position of the second notches 132 correspond to the outer side faces of the fixed columns 24, so that when the heat conducting piece 13 is accommodated in the second accommodating cavity 22, parts of the two fixed columns 24 are just located in the second notches 132, and the heat conducting piece 13 is limited through the cooperation of the second notches 132 and the fixed columns 24.

As a modification, the structure of the heat conductive member 13 is not limited, and it may be formed not as an annular body but as a plurality of independent heat conductive strips provided around the DMD 12.

Referring to fig. 9 and 10, the pressing member 14 is provided with a second skylight 141 and a through hole 144 at the center thereof, and a fixing portion, wherein the second skylight 141 is provided for the first connector to pass through. The number and positions of the through holes 144 are matched with those of the limit posts 23 on the housing 20, and the pressing member 14 penetrates into the through holes 144 through the limit posts 23 to prevent the DMD12 from being electrically connected unstably due to the inclination of the circuit board 16.

The fixing position is used to fix the pressing member 14 to the housing 20, and in the present utility model, the fixing position is specifically a notch 145, the notch 145 is disposed on the opposite corner of the pressing member 14, and the notch 145 is in communication with the external space (i.e., not a closed hole), and the number and position of the notch 145 are matched with those of the screw hole on the housing 20. The screw is screwed into the screw hole through the recess 145 to fix the pressing member 14 to the housing 20. It will be appreciated that the fixing location may be any other structure such as a through hole that can achieve a fixed connection between the pressing member 14 and the housing 20. The fixing position, the screw and the screw hole form a first fixing structure, and the pressing piece 14 is fixedly connected with the shell 20 through the first fixing structure.

The pressing member 14 is made of a heat conductive material, and preferably, the pressing member 14 is made of a metal sheet. When the pressing member 14 is a metal sheet, after positioning, when the screw is screwed into the screw hole through the recess 145, the pressing member 14 is liable to warp, such as deformation of the pressing member 14 in a direction away from the DMD12, which affects stability of electrical contact between the first connector and another connector (hereinafter, second connector) to which it is mated. To overcome this problem, as an embodiment, the pressing member 14 is provided with a reinforcing portion 142 protruding toward the DMD12 around the second louver 141, the reinforcing portion 142 being located corresponding to the heat conducting member 13, and when the pressing member 14 is mounted on the housing 20, the reinforcing portion 142 extends into the first accommodating chamber 21 and the second accommodating chamber 22 to press the heat conducting member 13 and the DMD12 against the housing 20. The surface of the reinforcing part 142 close to the DMD12 is a first surface 1421, the surface of the pressing member 14 surrounding the reinforcing part 142 and close to the DMD12 is a second surface 146, the first surface 1421 is in contact with the heat conducting member 13, and the second surface 146 is in contact with the surface B (the surface of the housing 20 where the accommodating cavity is opened). The strength of the reinforcement portion 142 around the second skylight 141 is enhanced, so that deformation of the compression member 14 during installation is not easy to affect the stability of electrical connection between the first connector and the mating connector, and is not easy to be deformed by heating. The pressing member 14 is made of a metal sheet, and preferably, the reinforcing portion 142 is a protrusion formed by punching on the surface of the metal sheet, and the height of the protrusion is 0.5-1mm.

As a further embodiment, the edge of the pressing member 14 is bent to form a bending portion 143, and the pressing member 14 is preferably L-shaped as a whole. The formation of the bent portion 143 is advantageous for reinforcing the strength of the pressing member 14, and reducing the possibility of deformation of the pressing member 14 under fixed and heated conditions. Preferably, the bending portion 143 is designed on the top of the pressing member 14 (the terms "upper", "lower", "top", "bottom", etc. refer to the relative positions in the designated view, not the absolute positions, and it will be understood that when the drawing is rotated 180 ° in the plane, the relative positions are changed, for example, "top" becomes "bottom", and the bending portion 143 bends toward the direction where the DMD12 is located, and the bending portion 143 covers a part of the surface of the housing 20, which can have the effects of light blocking, dust blocking, and easy installation. Preferably, the through hole is disposed at one side of the bending portion 143, so as to effectively prevent deformation of the pressing member 14 caused by stress variation between the through hole 144 and the limiting post 23.

With continued reference to fig. 9 and 10, the opposite ends of the pressing member 14 are provided with third notches 147, and the shape and size and the setting position of the third notches 147 correspond to the outer side surfaces of the fixing columns 24, so that when the pressing member 14 is fixed on the housing 20, the parts of the two fixing columns 24 are just located in the third notches 147, and the pressing member 14 is limited by the cooperation of the third notches 147 and the fixing columns 24.

Referring to fig. 11, the sealing member 15 is centrally provided with a third louver 151 for the first connector 19a to pass through. The opposite two ends of the sealing element 15 are provided with fourth notches 152, and the shape and size and the setting position of the fourth notches 152 correspond to the outer side faces of the fixed columns 24, so that after the sealing element 15 is installed, parts of the two fixed columns 24 are just located in the fourth notches 152, and the sealing element 15 is limited by the cooperation of the fourth notches 152 and the fixed columns 24.

Referring to fig. 12, the circuit board 16 is configured to drive the DMD12, and the circuit board 16 is provided with a second connector 19b on a side surface close to the DMD12, wherein one of the first connector 19a and the second connector 19b is a male connector, and the other is a female connector. The first connector 19a and the second connector 19b are plugged through the first skylight 131, the second skylight 141 and the third skylight 151 to achieve electrical connection between the circuit board 16 and the DMD 12. It is understood that the dimensions of the first connector 19a and the second connector 19b in the X direction are not limited, as long as the two connectors can be plugged to each other to achieve electrical connection, either the first connector 19a is connected through the first skylight 131, the second skylight 141, the third skylight 151 and the rear and second connector 19b, the second connector 19b is connected through the first skylight 131, the second skylight 141, the third skylight 151 and the rear and first connector 19a, or the first connector 19a or the second connector 19b is plugged after passing through one or more of the first skylight 131, the second skylight 141 and the third skylight 151. The circuit board 16 may be a printed circuit board or an FPC. It will be appreciated that the terms "first," "second," and "third" are merely used for distinguishing between the names of the components, and that the terms "first," "second," and "third" may be interchanged for convenience of description.

Referring back to fig. 3, the buffer member 17 is disposed between the heat sink 18 and the circuit board 16 to perform a buffering function to prevent the heat sink 18 from damaging the circuit board 16. The cushioning material 17 may be any shape such as a sheet, a column, or a ring, and the material may be any cushioning material such as silica gel, rubber, or foam. In the present utility model, a heat conductive column, specifically a rubber column or a silica gel column, is preferably used.

Referring to fig. 14 and 15, the heat sink 18 includes an integrally formed base 181, heat dissipation fins 182 and a heat transfer portion 183, the heat dissipation fins 182 and the heat transfer portion 183 are disposed on opposite sides of the base 181, and the heat dissipation fins 182 are arranged in a plurality of equally spaced manner on a surface of the base 181 away from the DMD 12. The heat transfer part 183 is integrally formed at the edge of the base 181 and protrudes towards the direction where the DMD12 is, in the mounted state, the surface of the heat transfer part 183 close to the DMD12 contacts with the surface of the pressing member 14 far away from the DMD12, and a heat transfer channel is formed among the DMD12, the heat conducting member 13, the pressing member 14 and the radiator 18, namely, the heat generated by the DMD12 during operation is transferred to the pressing member 14 through the heat conducting member 13, and the pressing member 14 transfers the heat to the radiator 18 in direct contact with the heat conducting member, so that the heat generated by the DMD12 during operation is effectively dissipated, and the working temperature of the DMD12 is reduced. Preferably, the surface of the heat transfer portion 183 close to the DMD12 is a plane, and the surface of the pressing member 14 contacting the heat transfer portion 183 is a plane, and both surfaces contact each other, thereby ensuring the heat conduction efficiency.

The heat transfer portions 183 are provided at least in two directions of the circuit board 16 to enhance heat dissipation. The heat transfer portion 183 includes a protrusion 1831 and a protrusion 1832, specifically, two mutually independent protrusions 1831 on the top of the base 181 are included on the back of the base 181, and one protrusion 1832 is provided on the bottom of the base 181. As a modification, the number of the protruding columns 1831 is not limited, and may be set according to the space between the heat sink 18 and the pressing member 14. The protruding columns 1831 are disposed at the corner positions of the radiator 18, which is convenient for heat dissipation and is beneficial to the stability of the product structure. The protruding columns 1831 or the protruding columns 1832 may be omitted, and only the protruding columns 1832 located at the bottom of the base 181 may be provided in the present utility model, or only the protruding columns 1831 located at a plurality of corners (e.g., 2, 3, or 4) of the heat sink 18 may be provided. The arrangement of the raised lines 1832 is beneficial to carrying the circuit board 16 on the raised lines 1832, the raised lines 1832 can carry the circuit board 16 while playing a role in heat dissipation, the circuit board 16 does not need to be additionally designed with a fixed structure, the structure of the product is simplified, and the production, the manufacture, the installation and the maintenance are convenient. It will be appreciated that the ribs 1832 may be replaced by two separate bosses 1831 which also serve the function of conducting heat and mounting the circuit board 16. Further, the circuit board 16 is located between the two protruding columns 1831, and the top is higher than the top of the base 181 and freely protrudes from the top of the base 181, and the circuit board 16 is relatively fixed in position by the heat sink 18.

As another understanding, the boss 1831 may be understood as a shorter sized rib 1832, and the rib 1832 may be considered as a plurality of integrally formed bosses 1831.

It will be appreciated that the total number of ribs 1832 and posts 1832 is plural, thus forming a plurality of heat transfer channels between DMD12, thermally conductive member 13, compression member 14 and heat sink 18, the plurality of heat transfer channels being circumferentially distributed around first connector 19a and second connector 19 b.

With continued reference to fig. 14 and 15, the base 181 has fixing holes 184 at opposite ends thereof, the fixing holes 184 are disposed between the protruding columns 1831 and the protruding columns 1832, the fixing holes 184 correspond to the mounting holes 241 on the fixing columns 24 of the housing 20, and fixing members (such as bolts, screws, etc.) are installed in the mounting holes 241 through the fixing holes 184 to connect the heat sink 18 and the housing 20. The fixing member, the fixing hole 184 and the fixing post 24 form a second fixing structure, and the radiator 18 and the housing 20 are fixedly connected through the second fixing structure.

With continued reference to fig. 15, a positioning groove 1812 is formed on a surface of the substrate 181 near one side of the DMD12, the positioning groove 1812 and the protruding strip 1832 cooperate to form a positioning portion 1811 for positioning the buffer member 17, a depth (a dimension in the X direction) of the positioning portion 1811 is smaller than a thickness (a dimension in the X direction) of the buffer member 17, a bottom surface of the buffer member 17 abuts against the heat transfer portion 183, and at least one side edge of the bottom surface can be positioned by the positioning groove 1812. The positioning groove 1812 is U-shaped, and the buffer member 17 is convenient to install.

In the present utility model, the shape and size of the edges of the first notch 121 of the DMD12, the second notch 132 of the heat conducting member 13, the third notch 147 of the pressing member 14, the fourth notch 152 of the sealing member 15, and the middle are matched with the shape and size of the side surface opposite to the fixing post 24, that is, the side surface of the second fixing structure forms a limit structure, and the limit can be realized by the same fixing post 24. It will be appreciated that one or more of the DMD12 or the thermally conductive member 13 or the compression member 14 or the sealing member 15 may be provided with other positioning structures instead of the fixing posts 24. The shape of the notch (including the first notch 121, the second notch 132, the third notch 147 and the fourth notch 152) is an arc shape matching with the side surface of the fixing post 24, and as a variant embodiment, the shape of the notch may be a U shape, a zigzag shape or other shapes. The edge shape dimensions of one or more of the heat conducting member 13, the pressing member 14, and the sealing member 15 are matched with the outer surface shape dimensions of the fixing post 24 so as to realize the limit at least partially by the fixing post 24, and other limit structures can be provided to assist in completing the limit.

When the DMD assembly 10 is mounted, the DMD12 and the heat conducting member 13 are mounted in the accommodating chamber, the DMD12 and the heat conducting member 13 are respectively defined in a position in a plane perpendicular to the X direction by the cooperation of the first notch 121 and the second notch 132 and the fixed post 24, and the first connector 19a protrudes relative to the surface of the DMD12 and penetrates through the first louver 131 and the second louver 141. The limiting post 23 passes through the through hole 144 on the pressing member 14, so that the circuit board 16 is prevented from tilting to make the electrical connection between the first connector 19a and the second connector 19b unstable. The bending part 143 covers the top surface of the housing 20, the fixing column 24 is partially clamped in the third notch 147, the reinforcing part 142 of the pressing member 14 extends into the accommodating cavity, the screw is screwed into the screw hole through the notch 145, the pressing member 14 is fixed with the housing 20, and the DMD12 is pressed in the housing 20 by the pressing member 14 through the heat conducting member 13. The fourth notch 152 of the sealing member 15 is clamped with the fixing column 24, the sealing member 15 is limited in a position perpendicular to the plane of the X direction, the buffer member 17 is positioned in the positioning part 1811, the circuit board 16 is mounted on the convex strip 1832, the radiator 18 provided with the buffer member 17 and the circuit board 16 is buckled with the shell 20, the fixing member passes through the fixing hole 184 and is locked in the mounting hole 241 on the fixing column 24, the radiator 18 and the shell 20 are fixed, the distance between the radiator 18 and the shell 20 can be adjusted through the fixing member, and in the utility model, the distance between the radiator 18 and the shell 20 enables the surface of the heat transfer part 183 close to the DMD12 to be attached to the surface of the pressing member 14 far away from the DMD12, and the buffer member 17 is compressed. The heat dissipation path of the projection optical engine 100 is formed in this way, and the buffer member 17 between the heat sink 18 and the circuit board 16 plays an effective role in buffering while ensuring a compact structure, so that effective protection is formed for the circuit board 16.

The present utility model further provides a projection device, which includes the projection optical engine 100 and a housing (not shown) as described above, wherein the projection optical engine 100 is fixed in the housing, and an opening (not shown) corresponding to the lens module 40 is disposed on the housing, and light projected by the lens module 40 is projected onto the projection surface through the opening.

Those skilled in the art will appreciate that the above-described preferred embodiments can be freely combined and stacked without conflict.

It will be understood that the above-described embodiments are merely illustrative and not restrictive, and that all obvious or equivalent modifications and substitutions to the details given above may be made by those skilled in the art without departing from the underlying principles of the utility model, are intended to be included within the scope of the appended claims.

Claims (12)

1. A projection light engine, characterized by: the projection optical machine comprises a shell, a DMD, a heat conducting piece, a compressing piece, a circuit board and a radiator, wherein the DMD, the heat conducting piece, the compressing piece, the circuit board and the radiator are sequentially arranged in a stacked mode; the DMD is fixed on the shell, and the circuit board is electrically connected with the DMD;

the radiator comprises radiating fins, a base body and a heat transfer part, wherein the radiating fins are integrally formed on the surface, away from the circuit board, of the base body, the heat transfer part is arranged on the edge part, close to the surface of the circuit board, of the base body and protrudes towards the direction where the DMD is located, the heat transfer part is close to the surface of the DMD and is contacted with the surface, away from the DMD, of the pressing part, and a heat transmission channel is formed among the DMD, the heat conduction part, the pressing part and the radiator.

2. The projection light engine of claim 1, wherein: a first connector is arranged on one side of the DMD, which is close to the pressing piece; a second connector is arranged on one side, close to the DMD, of the circuit board, and a first skylight is arranged on the pressing piece so that the first connector can be plugged with the second connector to realize electrical connection between the circuit board and the DMD;

the plurality of heat transfer channels is circumferentially distributed around the first and second connectors.

3. The projection light engine of claim 1, wherein: the heat transfer part comprises a convex column and/or a convex strip, and the convex column and/or the convex strip are at least arranged at two positions of the circuit board.

4. The projection light engine of claim 1, wherein: the heat transfer part comprises a raised line arranged along the bottom of the base body and a raised column arranged along the top of the base body, and a fixing hole for fixing the radiator on the shell is arranged between the raised column and the raised line; the bottom of the circuit board is borne on the raised strips, and the top of the circuit board extends out from between the two raised columns and is higher than the top of the radiator.

5. The projection light engine of claim 1, wherein: a sealing element is arranged between the circuit board and the pressing element, and a buffer element with a buffer effect is arranged between the circuit board and the radiator;

and a positioning groove is formed in the surface, close to the circuit board, of the base body, and the positioning groove is matched with the heat transfer part to form a positioning part for positioning the buffer piece.

6. The projection light engine of claim 2, wherein: the pressing member is provided with a reinforcement portion protruding toward the DMD around the first louver.

7. The projection light engine of claim 6, wherein: the DMD is arranged in the accommodating cavity, and the compressing piece compresses the heat conducting piece to compress the DMD on the shell.

8. The projection light engine of claim 7, wherein: the accommodating cavity comprises a first accommodating cavity and a second accommodating cavity which are communicated, the second accommodating cavity is arranged around the first accommodating cavity, the DMD is accommodated in the first accommodating cavity, one part of the heat conducting piece is accommodated in the first accommodating cavity, the other part of the heat conducting piece is accommodated in the second accommodating cavity, and the surface of the heat conducting piece far away from the pressing piece is contacted with the inner wall of the second accommodating part far away from the pressing piece and the surface of the DMD close to the pressing piece; the reinforcing part stretches into the first accommodating cavity and the second accommodating cavity and compresses the DMD in the shell through the heat conducting piece.

9. The projection light engine of any one of claims 1-5, wherein: the top of the pressing piece is provided with a bending part formed by bending, and the bending part covers the top surface of the shell;

the compressing piece is provided with a through hole at a position close to the bending part, and the shell is provided with a limiting column corresponding to the through hole.

10. The projection light engine of any one of claims 1-5, wherein: the compressing piece is fixedly connected with the shell through a first fixing structure; the radiator is fixedly connected with the shell through a second fixing structure.

11. The projection light engine of claim 10, wherein: the side of the second fixing structure forms a limiting structure, and the edge of one or more of the DMD, the heat conducting piece and the compressing piece is provided with a notch which is matched with the limiting structure in shape to realize limiting.

12. A projection device, characterized by: comprising a projection light engine as claimed in any one of claims 1-11.

Images