CN217587848U - Projection device - Google Patents

Abstract

The utility model discloses a projection equipment for solve the problem that the connecting piece between optical engine and the bearing member drops easily among the prior art. The bearing plate of the projection equipment is arranged in the first shell, and the bearing plate divides the space in the first shell into a first containing cavity and a second containing cavity. The optical engine is arranged in the first accommodating cavity. The plurality of first connecting assemblies are connected between the optical engine and the bearing plate. The first connecting assembly comprises a first fixing piece and a first supporting piece. The first fixing member is disposed on the bearing plate and connected to the optical engine. The first supporting member is disposed on the carrier plate and located on the periphery of the first fixing member, and one end of the first supporting member away from the carrier plate is abutted to the optical engine. The utility model provides a projection equipment, first support piece can provide the holding power at the position of first mounting week side to optical engine, can prevent that first mounting from falling the impact force at the host computer transportation and too big and drop, lead to optical engine aversion scheduling problem.

Description

Projection device

Technical Field

The utility model relates to a projection display technology field especially relates to a projection equipment.

Background

The laser projection display technology is an optical display technology which adopts a semiconductor laser to convert electric energy into light energy and projects the laser onto a screen through a light path system, a circuit system and a lens system.

In the prior art, an optical engine inside a projection device is generally connected to a carrier plate through a plurality of connecting columns spaced from each other, as shown in fig. 1 (b), the connecting columns are generally fixedly connected to the carrier plate in a riveting manner, the riveting connection is located on a side of the carrier plate away from the optical engine, and the optical engine is supported by friction force generated by deformation and expansion between members at the riveting connection. However, in the transportation process, the impact force generated by the optical engine when the projection device falls easily causes the connecting column to fall off due to overlarge stress, and further causes the optical engine to shift, thereby affecting the performance of the whole projection device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a projection equipment for solve the problem that the connecting piece between optical engine and the bearing member drops easily among the prior art.

In order to achieve the above purpose, the utility model provides the following technical scheme:

some embodiments of the present invention provide a projection device, which includes a first housing, a bearing plate, an optical engine, and a plurality of first connection assemblies. The bearing board sets up in first casing, and the bearing board holds the chamber for first chamber and the second with the space separation in the first casing. The optical engine is arranged in the first accommodating cavity. The plurality of first connecting assemblies are connected between the optical engine and the bearing plate. The first connecting assembly comprises a first fixing piece and a first supporting piece. The first fixing member is disposed on the bearing plate and connected to the optical engine. The first supporting member is disposed on the carrier plate and located on the periphery of the first fixing member, and one end of the first supporting member away from the carrier plate is abutted to the optical engine.

In some embodiments, the first fixing member has a cylindrical shape, one end of the first fixing member is connected to the bearing plate, and the first fixing member has a first threaded hole extending in the axial direction. The optical engine has a plurality of first mounting holes. The first connecting assembly further comprises a plurality of first connecting pieces, one end of one first connecting piece penetrates through one first mounting hole to be screwed with the first threaded hole, and the other end of the first connecting piece is abutted to the edge of one side, away from the bearing plate, of the first mounting hole.

In some embodiments, the carrier plate has a plurality of first riveting holes, and the first riveting holes penetrate through the carrier plate. The end part of the first fixing piece close to the second accommodating cavity penetrates through the first riveting hole and then is riveted on the bearing plate.

In some embodiments, the first supporting member has a cylindrical shape, and one end of the first supporting member is connected to the carrier plate, and the other end of the first supporting member abuts against the optical engine.

In some embodiments, the carrier plate has a plurality of second riveting holes, and the second riveting holes penetrate through the carrier plate. The first supporting piece comprises a first body and a first riveting part. The first body is cylindrical, and a portion of one of the first bodies is located within one of the second rivet holes. The first riveting portion is arranged on the outer peripheral surface of the first body, is positioned on one side of the bearing plate close to the first accommodating cavity and is riveted on the bearing plate.

In some embodiments, the first body comprises: a support section and a connecting section. The connecting section is matched with the second riveting hole; the diameter of linkage segment is less than the diameter of support section, and first riveting portion sets up on the outer peripheral face of linkage segment and is connected with the support section.

In some embodiments, the first rivet is disposed about a circumference of the connecting section, and the diameter of the first rivet is less than the diameter of the support section.

In some embodiments, the carrier plate has a plurality of bosses protruding toward the first receiving cavities, and the bosses have a thickness equal to that of the carrier plate in a direction perpendicular to the carrier plate. A coupling assembly is disposed on a boss.

In some embodiments, the first housing comprises: and the bottom shell is arranged opposite to the bearing plate and is a partial cavity wall of the second accommodating cavity. The projection equipment also comprises a plurality of second connecting assemblies which are used for connecting the bearing plate and the bottom shell. The second connecting assembly comprises a second fixing piece and a second supporting piece. One end of the second fixing piece is connected with the bottom shell; the end of the other end penetrates through the bearing plate and is riveted on the bearing plate. The second supporting piece comprises a second main body part and a second riveting part, one end of the second main body part is abutted with the bottom shell, and the other end of the second main body part penetrates through the bearing plate; the second riveting part is arranged on the outer peripheral surface of the second main body part, is positioned on one side of the bearing plate close to the second containing cavity and is riveted on the bearing plate.

In some embodiments, the projection device further comprises: and the sound box is arranged in the second accommodating cavity and is connected with the first shell.

The utility model provides a projection equipment has following beneficial effect:

the utility model provides a projection device, through making first casing enclose out the holding chamber, the loading board separates the holding chamber into first holding chamber and second holding chamber, and optical engine sets up in first holding chamber, makes optical engine can produce laser beam, modulation light beam and throw the light beam to the projection screen, so that the user watches the image; the first fixing piece in each group of first connecting assemblies is arranged on the bearing plate, and one end, away from the bearing plate, of the first fixing piece is connected with the optical engine, so that the optical engine can be fixedly arranged on the bearing plate; the first supporting piece in each group of first connecting assemblies is arranged on the bearing plate and positioned on the peripheral side of the first fixing piece, and one end, far away from the bearing plate, of the first supporting piece is abutted against the optical engine, so that the first supporting piece can provide supporting force for the optical engine at the peripheral side position of the first fixing piece; the optical engine is connected with the bearing plate through the first connecting assemblies, so that the first connecting assemblies can stably connect the optical engine to the bearing plate, the optical engine can be prevented from shifting due to the fact that a certain first fixing piece is excessively born and drops, the performance of the whole machine is further influenced, and meanwhile, the damage to parts in the second containing cavity can be prevented when the first fixing piece drops from the bearing plate.

In addition, the second holds the intracavity and can set up other functional part (like the stereo set) for the structure of projection equipment complete machine is the overall arrangement design of two-layer heap, therefore the compact structure of projection equipment complete machine, integrates the degree height, small, and simultaneously, the area of loading board also corresponding reduces, makes the weight of projection equipment complete machine lighter, and the use of shifting of being convenient for has strengthened projection equipment's suitability, has improved user's use and has experienced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 (a) is a schematic diagram of a laser projection display device of the prior art;

FIG. 1 (b) is a schematic diagram of a connection structure between an optical engine and a carrier plate in the prior art;

fig. 2 is a schematic external view of a projection device according to some embodiments of the present invention;

fig. 3 is an exploded view of a projection device according to some embodiments of the present invention;

fig. 4 is a three-dimensional schematic diagram of a partial structure of a projection device according to some embodiments of the present invention;

fig. 5 is a three-dimensional schematic diagram of a partial structure of a projection device according to further embodiments of the present invention;

fig. 6 is a schematic diagram of a portion of a sound box according to some embodiments of the present invention;

fig. 7 is a schematic diagram of a portion of a heat dissipation system according to some embodiments of the present invention;

fig. 8 is an exploded view of a heat dissipation system according to some embodiments of the present invention;

fig. 9 is a three-dimensional schematic diagram of a portion of a projection device according to further embodiments of the present invention;

fig. 10 is a cross-sectional view of a portion of a projection device according to some embodiments of the present invention;

fig. 11 is a schematic view of a first support according to some embodiments of the present invention;

fig. 12 is an exploded view of a portion of a laser projection device according to some embodiments of the present invention;

fig. 13 is a cross-sectional view of a portion of a projection device according to further embodiments of the present invention;

fig. 14 is a three-dimensional schematic diagram of a partial structure of a projection device according to further embodiments of the present invention.

Reference numerals: 100-a projection device; 010-an optical engine; 1-a first housing; 101-a containment chamber; 1011-a first containing cavity; 1012-a second containing cavity; 102-a first shell wall; 1021-a light-transmitting portion; 1022-a shell wall body; 1023-a glass cover plate; 1024 — light hole; 1025-fixing ring; 103-a second shell wall; 1031-first heat dissipation hole; 104-a third shell wall; 105-a fourth shell wall; 1051-a second heat dissipation hole; 106-a bottom shell; 107-top shell; 2-a bearing plate; 201-a bearing surface; 202-a first staking hole; 203-a second staking hole; 204-boss; 3-a laser light source; 301-a laser; 4-a light machine; 401 — a first mounting hole; 5-lens; 501-a second end; 5011-first clip part; 6-a heat dissipation system; 601-a thermally conductive member; 6011-a first surface; 6012-a second surface; 60121-groove; 602-a heat pipe; 6021-a first heat pipe; 60211-a first straight section; 60212-a second straight section; 60213-bending the tube section; 6022-a second heat pipe; 6023-third heat pipe; 603-a set of cooling fins; 6031-cooling fins; 6031 a-first cooling fin; 60311 a-first end; 60312 a-notch; 6031 b-second cooling fins; 6031 c-third fin; 6031 d-fourth fin; 604-a fan; 605-a fan support; 7-sound equipment; 701-a second shell; 7011-a third receiving chamber; 7012-a first opening; 7013-top wall; 7014-bottom wall; 7015-side wall; 7016-a second opening; 702-a speaker; 7021-a first speaker; 7022-a second speaker; 703-a passive radiator; 8-a circuit board; 801-main board; 802-display panel; 803-drive plate; 9-a circuit board support; 901-a main body portion; 902-a connecting part; 10-a conductive connection; 11-a first connection assembly; 1101-a first fixture; 1101 a-connecting column; 11011-first threaded hole; 1102-a first support; 11021-a first body; 11022-first rivet; a first connector 1103; 12-a second connection assembly; 1201-a second fixture; 1202-a second support; 12021-a second body portion; 13-a first dust guard; 14-a second dust guard; 1401-a third main body portion, 1402-a second clip portion; 14021-clamping the cantilever; 14022-a clamping projection; 1403-dust prevention part; 1404-a second limit step; 15-a shock absorber; 200-projection screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

In the embodiments of the present application, the words "exemplary" or "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The laser projection display technology is an optical display technology which adopts a semiconductor laser to convert electric energy into light energy and projects the laser onto a screen through a light path system, a circuit system and a lens system. Generally, the projection apparatus 100 is required to be used with a projection screen 200, as shown in fig. 1 (a), the projection apparatus 100 can emit a laser beam to the projection screen 200, and a curtain of the projection screen 200 reflects the laser beam to display a picture.

In the prior art, the optical engine 010 inside the projection apparatus 100 is usually connected to the carrier plate 2 through a plurality of connecting posts 1101a spaced from each other, as shown in fig. 1 (b), the connecting posts 1101a are usually fixedly connected to the carrier plate 2 through riveting, the riveting connection portion is located on the side of the carrier plate 2 away from the optical engine 010, and the optical engine 010 is supported by the friction force generated by the deformation and expansion between the members of the riveting connection portion. However, in the transportation process, when the projection apparatus 100 falls, the connecting column 1101a is easily forced to fall off by an impact force generated by the optical engine 010, and the optical engine 010 is further displaced, so that the performance of the whole projection apparatus 100 is affected.

Based on this, referring to fig. 3, some embodiments of the present invention provide a projection apparatus 100, which includes a first housing 1 (shown in fig. 2), a loading plate 2, an optical engine 010, and a plurality of first connection assemblies 11. Projection device 100 may also include a heat dissipation system 6.

The first housing 1 encloses a receiving cavity 101 (shown in fig. 5). The loading plate 2 is disposed in the first housing 1, and the loading plate 2 divides the accommodating cavity 101 (i.e. the space in the first housing 1) into a first accommodating cavity 1011 and a second accommodating cavity 1012. Illustratively, as shown in fig. 3, the first casing 1 may include a first casing wall 102, a second casing wall 103, a third casing wall 104, a fourth casing wall 105, a bottom casing 106 and a top casing 107, wherein the bottom casing 106 and the top casing 107 may be oppositely disposed, the first casing wall 102 and the third casing wall 104 are respectively a front side wall and a rear side wall of the device, and the second casing wall 103 and the fourth casing wall 105 are respectively a left side wall and a right side wall of the device. In this regard, for example, the second wall 103, the fourth wall 105 and the top shell 107 may be an integral structure, the integral connection may be connected to the bottom shell 106 through a screw connection, and connected to the first wall 102 and the third wall 104 through a snap connection, and of course, the first wall 102, the second wall 103, the third wall 104, the fourth wall 105, the bottom shell 106 and the top shell 107 may also be connected through other forms, which is not limited in this application.

To facilitate mounting of the functional components, the carrier plate 2 may be a metal plate, serving as a bearing member for each functional component of the projection apparatus 100. As another example, the carrier plate 2 may be approximately flat, and the first receiving cavity 1011 and the second receiving cavity 1012 may be regular shapes, so as to facilitate layout and installation of related functional components.

The optical engine 010 is disposed in the first receiving cavity 1011. The optical engine 010 is composed of a laser light source 3 (shown in fig. 4), an optical machine 4, and a lens 5, which are connected in this order in the light beam transmission direction.

Illustratively, the laser light source 3 may be a three-color light source, which includes a red laser assembly, a blue laser assembly, a green laser assembly, and a plurality of optical lenses, which homogenize and converge the laser beam. Alternatively, the laser light source 3 may also be a non-three-color laser light source, i.e. the laser light source 3 may be a monochromatic light source or a two-color light source. The monochromatic light source may employ a blue laser assembly to excite the phosphor to produce another two colors of primary light (e.g., red and green fluorescent light), or to produce more than two colors of fluorescent light. The two-color light source may employ a blue laser assembly and a red laser assembly, where the blue laser assembly excites the phosphor to produce green fluorescence (or other color fluorescence).

Illustratively, the optical engine 4 may include a plurality of lens groups, such as a Total Internal Reflection (TIR) prism and a Reverse Total Internal Reflection (RTIR) mirror, for forming an illumination light path, so that the illumination light beam may be incident on a core device in the optical engine 4, i.e. a light valve, which is used for modulating the light beam and making the modulated light beam incident on a lens group of the lens 5 for imaging. On this basis, the light valve may be, for example, a Digital Micromirror chip (DMD); alternatively, the light valve may be a Liquid Crystal On Silicon (LCOS) valve, which may be used.

Illustratively, the lens 5 may be an ultra-short-focus projection lens, which generally includes a refractive lens group and a reflective lens group, and is configured to receive the light beam emitted after being modulated by the optical engine 4 for imaging. The ultra-short-focus projection device can achieve a smaller projection ratio (the projection ratio is a ratio of a vertical distance from a central point of a light emitting surface of the lens 5 to a plane where the projection screen 200 is located to a width of a display area on the projection screen 200, wherein the width of the display area refers to a size of the display area along a horizontal direction), for example, less than or equal to 0.3, so that the projection device 100 can be closer to the projection screen 200 when projecting an image, so as to reduce a space occupied by the whole projection display system; or, the lens 5 may also be a telephoto lens, which is less difficult to design and lower in cost.

In order to dissipate heat from the heat generating components, a heat dissipating system 6 is disposed in the first receiving cavity 1011 for dissipating heat at least from the laser light source 3. Illustratively, the heat dissipation system 6 may include a liquid cooling system composed of at least one cold head, a cold row and a connecting pipe, and the cold head may be in contact with at least one of the laser source 3, the optical machine 4, and the lens 5, and other heat generating components (e.g., a circuit board). The heat dissipation system 6 may further include a heat dissipation system composed of a heat exchange plate, a heat pipe, a heat dissipation fin, and the like, and the heat exchange plate may be in contact with at least one of the laser light source 3, the optical engine 4, and the lens 5, and other heat generating components (e.g., a circuit board). The heat dissipation system 6 may further include an air-cooled heat dissipation system including a fan and the like. The different heat dissipation modes can be used independently or in combination, and can be applied.

In order to fix the optical engine 010, a plurality of first connection assemblies 11 are connected between the optical engine 010 and the carrier plate 2. For example, at least one of the laser source 3, the optical engine 4 and the lens 5 is connected to the supporting plate 2 through a plurality of first connecting components 11, for example, the optical engine 4 is connected to both the laser source 3 and the lens 5, which is an intermediate component in the optical path of the optical engine 010, and the optical engine 010 can be connected to the supporting plate 2 through the optical engine 4, that is, the plurality of first connecting components 11 are connected between the optical engine 4 and the supporting plate 2.

Based on this, in order to prevent the connection between the optical engine 010 and the carrier plate 2 from being displaced due to failure, the first connection assembly 11 includes a first holder 1101 and a first support 1102. The first fixing member 1101 is disposed on the carrier plate 2 and connected to the optical engine 010. Illustratively, the first fixing member 1101 may be fixedly connected to the carrier plate 2; alternatively, the first fixing member 1101 may be detachably connected to the carrier plate 2, and both can be used. The first supporting member 1102 is disposed on the carrier plate 2 and located on the periphery of the first fixing member 1101, and one end of the first supporting member 1102 away from the carrier plate 2 abuts against the optical engine 010. For example, the first support 1102 may be fixedly connected with the carrier plate 2; alternatively, the first support 1102 may be detachably connected to the carrier plate 2; alternatively, the first supporting member 1102 and the carrier plate 2 can be integrally formed, and both can be applied.

To sum up, the utility model provides a projection apparatus 100, through making first casing 1 enclose out holding chamber 101, bearing board 2 separates holding chamber 101 into first holding chamber 1011 and second holding chamber 1012, and optical engine 010 (laser light source 3, ray apparatus 4 and camera lens 5) sets up in first holding chamber 1011, makes optical engine 010 can produce laser beam, modulation light beam and project light beam to projection screen 200, so that the user watches the image; by arranging the first fixing piece 1101 in each group of the first connecting assemblies 11 on the bearing plate 2, one end of the first fixing piece 1101 away from the bearing plate 2 is connected to the optical engine 010, so that the optical engine 010 can be fixedly installed on the bearing plate 2; by arranging the first supporting members 1102 in each group of first connecting assemblies 11 on the loading plate 2 and on the peripheral side of the first fixing member 1102, one end of the first supporting member 1102 away from the loading plate 2 abuts against the optical engine, so that the first supporting members 1102 can provide supporting force for the optical engine 010 at the peripheral side position of the first fixing member 1101; the optical engine 010 is connected to the carrier plate 2 through the first connecting assemblies 11, so that the first connecting assemblies 11 can firmly connect the optical engine 010 to the carrier plate 2, thereby preventing the optical engine 010 from shifting due to the excessive falling of a certain first fixing member 1101, and further preventing the performance of the whole machine from being affected, and simultaneously preventing the damage to the components in the second accommodating cavity 1012 when the first fixing member 1101 falls from the carrier plate 2.

In addition, the heat dissipation system 6 is disposed in the first accommodating cavity 1011 and connected to the bearing plate 2, so that the heat dissipation system 6 can dissipate heat for the optical engine 010, thereby ensuring stable operation of the optical engine 010 and further ensuring the overall performance of the projection apparatus 100.

In addition, hold chamber 1012 through setting up the second, make the second hold and to set up other functional unit (like the stereo set) in the chamber 1012, make the structure of 100 complete machines of projection equipment be the overall arrangement design of two-layer heap, therefore the compact structure of 100 complete machines of projection equipment, the degree of integration is high, small, and simultaneously, the also corresponding reduction in area of loading board 2, make the weight of 100 complete machines of projection equipment lighter, be convenient for shift use, the suitability of projection equipment 100 has been strengthened, user's use experience has been improved.

In order to enrich the performance of the projection apparatus 100 and make the whole apparatus compact, referring to fig. 6, in some embodiments, the projection apparatus 100 further includes: and a speaker 7 disposed in the second receiving chamber 1012 and connected to the first casing 1. Illustratively, the speaker 7 may be connected to the bottom case 106; alternatively, the speaker 7 may be connected to another wall of the first casing 1; alternatively, the sound 7 can be connected to the carrier plate 2, both being applicable.

In this way, the sound 7 is disposed in the second accommodating cavity 1012 of the projection apparatus 100, so that the volume of the second accommodating cavity 1012 can be independently applied to the sound 7, the volume of the sound 7 can be as large as possible, the low-frequency effect and the resonance effect of the sound 7 are enhanced, and the user experience is also improved.

As a possible implementation, referring to fig. 3, in some embodiments, the sound 7 comprises a second housing 701 and at least one speaker 702. The second housing 701 encloses a third accommodating cavity 7011 (as shown in fig. 6), the second housing 701 has at least one first opening 7012, and the first opening 7012 communicates with the third accommodating cavity 7011. A speaker 702 is installed at a first opening 7012 and connected to the second housing 701, and a sound emitting direction of the speaker 702 faces a direction away from the third accommodating chamber 7011 of the second housing 701. So design, under the effect that the third that second casing 701 enclosed holds chamber 7011, the dive ability of stereo set 7 can promote the low frequency, therefore stereo set 7 goes out the sound clear, and the low frequency performance is good.

For example, the second housing 701 may be approximately rectangular, the second housing 701 may include a top wall 7013, a bottom wall 7014 (as shown in fig. 6), and a side wall 7015, the top wall 7013 and the bottom wall 7014 are disposed opposite to each other, the side wall 7015 is disposed around the top wall 7013 and connected between the top wall 7013 and the bottom wall 7014, and the first opening 7012 is disposed on the side wall 7015 of the second housing 701, so that the second housing 701 has a regular shape, and a case shock caused by interference of standing waves due to irregular shapes of the second housing 701 can be prevented.

Illustratively, the sound 7 may be connected to the bottom case 106 of the first housing 1 through a connecting member, so that the sound 7 is prevented from contacting the carrier plate 2 to generate mechanical vibration, thereby affecting the overall performance of the projection apparatus 100.

Illustratively, the speaker 702 may be disposed on a side wall 7015 of the second housing 701 for ease of design and installation.

Illustratively, the number of speakers 702 may be one; alternatively, the number of speakers 702 may also be two; alternatively, the number of the speakers 702 may be plural, and any number may be used.

Illustratively, the speaker 702 may be comprised of a clevis, primary magnet, secondary magnet, damper, voice coil, frame, cone, dust cap, and suspension.

To create a better sound field, referring to fig. 6, in some embodiments, the at least one speaker 702 includes a first speaker 7021 and a second speaker 7022, the first speaker 7021 and the second speaker 7022 being oppositely disposed. By the design, the first loudspeaker 7021 and the second loudspeaker 7022 can sound in two opposite directions to form a better sound field, so that the viewing effect of a user is improved; in addition, when two speakers are provided in the sound unit 7, for the same-phase signals, it is equivalent to that the two speakers simultaneously act in the third accommodation chamber 7011, and compared with a single speaker, the area and the equivalent volume of the main diaphragm of the sound unit 7 are doubled, and the resonance frequency of the whole sound unit 7 is reduced, so that the low-frequency effect of the sound unit 7 is better.

For example, the first speaker 7021 may be a left channel speaker and the second speaker 7022 may be a right channel speaker, so that the sound 7 may emit stereo sound to enhance the user experience.

For example, the first speaker 7021 and the second speaker 7022 may be respectively located on two sides of the optical axis of the outgoing light beam of the lens 5, that is, the sound 7 is designed to emit sound left and right, the sound field is expanded in the left and right directions, the coverage range is wider, and the viewing effect of the user is improved.

In order to further improve the sound quality of the sound 7, referring to fig. 6, in some embodiments, the second housing 701 further has at least one second opening 7016. The audio device 7 further includes at least one passive radiator 703, and one passive radiator 703 is installed at one second opening 7016 and connected to the second housing 701. So design, the third holds the air in the chamber 7011 and drives passive radiator 703 under the effect of speaker 702 and carry out passive sounding, can further adjust the tone quality of stereo set 7 to make stereo set 7 have better bass performance, and then promote and see the shadow effect.

Illustratively, the number of passive radiators 703 may be two, and the two passive radiators 703 are disposed opposite to each other.

Illustratively, when the number of the passive radiators 703 is two, the two passive radiators 703 may be disposed on the top wall 7013 (shown in fig. 3) and the bottom wall 7014 of the second housing 701, respectively.

As one possible implementation, referring to fig. 4, in some embodiments, the heat dissipation system 6 includes a heat conducting member 601, at least one heat pipe 602, and a heat dissipation fin set 603. The heat-conducting member 601 has a first surface 6011 (shown in fig. 7) and a second surface 6012 opposite to each other; the first surface 6011 is in contact with the laser light source 3. At least one heat pipe 602 is connected to the heat conductive member 601. The heat dissipating fin set 603 includes a plurality of heat dissipating fins 6031 arranged at intervals, and the at least one heat pipe 602 penetrates through the plurality of heat dissipating fins 6031 and contacts with the heat dissipating fins 6031. At least a portion of the heat dissipating fins 6031 is located on a side of the second surface 6012 away from the first surface 6011, and is connected to the second surface 6012 and/or the at least one heat pipe 602.

With such a design, by bringing the first surface 6011 of the heat conduction member 601 into contact with the laser 301 of the laser light source 3, heat generated by the laser 301 can be conducted to the heat conduction member 601; by connecting the heat pipe 602 with the heat conducting member 601, the heat pipe 602 penetrates through the plurality of heat dissipating fins 6031 of the heat dissipating fin group 603 and is in contact with the heat dissipating fins 6031, so that heat in the heat pipe 602 can be conducted to the heat dissipating fins 6031 for heat dissipation; at least part of the heat dissipation fins 6031 of the heat dissipation fin group 603 are located on one side, far away from the first surface 6011, of the second surface 6012 of the heat conducting member 601, so that the heat dissipation fin group 603 and the laser light source 3 can be arranged in a stacked mode, heat dissipation of the laser light source 3 can be achieved without flatly laying the heat dissipation fin group 603 and other functional components in the projection device 100, and the projection device 100 is compact in whole structure, high in integration degree and small in size. In addition, by positioning at least a part of the heat dissipation fins 6031 on the side of the second surface 6012 of the heat conducting member 601 away from the first surface 6011 and connecting with the second surface 6012 and/or the at least one heat pipe 602, the heat conduction and dissipation path of the heat generated by the laser light source 3 is shorter, and the heat dissipation efficiency is higher.

For example, the laser light source 3 may include the laser 301, the laser 301 may be a three-color laser, the light emitting surface of the laser 301 faces the carrier plate 2, and the first surface 6011 of the heat conducting member 601 is attached to the back surface (the surface opposite to the light emitting surface) of the laser 301.

Illustratively, the heat-conducting member 601 may be a heat-conducting copper plate, and the first surface 6011 may be a plane.

Illustratively, the number of heat pipes 602 may be one; alternatively, the number of the heat pipes 602 may be plural, for example, as shown in fig. 7, the number of the heat pipes 602 may be three, and all of them may be applied.

For example, the heat pipe 602 may be connected to the heat conductive member 601 by welding.

For example, the heat dissipation fins 6031 in the heat dissipation fin group 603 may all be located on the side of the second surface 6012 of the heat conductive member 601 away from the first surface 6011; alternatively, a part of the heat dissipating fins 6031 in the heat dissipating fin group 603 may be located on a side of the second surface 6012 of the heat conducting member 601 away from the first surface 6011, and may be applied.

For example, the heat dissipation fin 6031 on the side of the second surface 6012 away from the first surface 6011 may be connected with the second surface 6012 by welding; alternatively, the heat dissipation fins 6031 on the side of the second surface 6012 away from the first surface 6011 may be connected to the heat pipe 602 by welding; alternatively, the heat dissipating fin 6031 on the side of the second surface 6012 away from the first surface 6011 may be connected to both the second surface 6012 and the heat pipe 602 by welding, and both may be used.

As a possible implementation manner, referring to fig. 8, in some embodiments, the plurality of heat dissipation fins 6031 include a plurality of first heat dissipation fins 6031a located on a side of the second surface 6012 away from the first surface 6011. One end of the first heat dissipation fin 6031a close to the second surface 6012 is a first end 60311a, and the first end 60311a is connected to the second surface 6012; the first end 60311a has at least one notch 60312a; the slot wall of one slot 60312a abuts a portion of the outer wall of one heat pipe 602. So design, both can be connected first radiating fin 6031a with heat-conducting piece 601, strengthen first radiating fin 6031 a's steadiness, can make the area of contact between first radiating fin 6031a and the heat pipe 602 as big as possible again, guarantee the heat pipe 602 to the effect of first radiating fin 6031a heat conduction, and then guarantee cooling system 6's radiating effect.

Illustratively, the first end 60311a of the first heat dissipating fin 6031a may be welded to the second surface 6012 of the heat conductive member 601.

For example, the cross section of the notch 60312a may be circular arc, and the side wall of the notch 60312a is attached to the outer wall of the heat pipe 602.

For example, the side wall of the notch 60312a of the first heat dissipating fin 6031a may be connected to the outer wall of the heat pipe 602 by welding.

In order to enhance the heat exchange efficiency between the heat conducting member 601 and the heat pipe 602, referring to fig. 8, in some embodiments, the second surface 6012 of the heat conducting member 601 has at least one groove 60121, and a wall of one groove 60121 is attached to a part of an outer wall of one heat pipe 602. By the design, the contact area between the heat conducting piece 601 and the heat pipe 602 is as large as possible, the heat exchange efficiency between the heat conducting piece 601 and the heat pipe is improved, and the heat dissipation efficiency of the heat dissipation system 6 on the laser light source 3 is further improved.

For example, the cross section of the groove 60121 may be circular arc, and a groove wall of the groove 60121 is attached to a part of the outer wall of the heat pipe 602.

For example, the groove wall of the groove 60121 and the groove wall of the notch 60312a are relatively buckled to form a circular mounting hole, and the outer wall of the heat pipe 602 is attached to the hole wall of the mounting hole.

In order to improve the heat dissipation efficiency of the heat dissipation system 6 for the laser light source 3, referring to fig. 8, in some embodiments, the plurality of heat dissipation fins 6031 further include a plurality of second heat dissipation fins 6031b. The plurality of second heat dissipation fins 6031b are disposed on a side of the laser light source 3 close to the heat conducting member 601 and abut against the plurality of first heat dissipation fins 6031 a. A plurality of second heat dissipation fins 6031b are connected to the at least one heat pipe 602. By such design, the space of the laser light source 3 near the heat conducting part 601 can be fully utilized to increase the number of the heat dissipating fins 6031, and further improve the heat dissipating efficiency of the heat dissipating system 6 on the laser light source 3.

Illustratively, the heat pipe 602 extends through the second heat dissipating fin 6031b and is welded to the second heat dissipating fin 6031b.

In order to improve the heat dissipation efficiency of the heat dissipation system 6 for the laser light source 3, referring to fig. 8, in some embodiments, the plurality of heat dissipation fins 6031 further include a plurality of third heat dissipation fins 6031c. The plurality of third heat dissipating fins 6031c are disposed on the peripheral sides of the laser light source 3 and the heat conducting member 601 and abut against the plurality of second heat dissipating fins 6031b, and at least a portion of the laser light source 3 is located in a space surrounded by the plurality of first heat dissipating fins 6031a, the plurality of second heat dissipating fins 6031b, and the plurality of third heat dissipating fins 6031c. A plurality of third heat dissipation fins 6031c are connected to the at least one heat pipe 602. By such design, the space around the laser light source 3 and the heat conducting member 601 can be fully utilized to increase the number of the heat dissipating fins 6031, thereby improving the heat dissipating efficiency of the heat dissipating system 6 for the laser light source 3.

Illustratively, the third heat dissipation fin 6031c may be disposed on the rear side of the laser light source 3 and the heat conductive member 601.

Illustratively, the first heat dissipating fin 6031a, the second heat dissipating fin 6031b and the third heat dissipating fin 6031c are perpendicular to the first surface 6011 of the heat conducting member 601 and are arranged at intervals along the front-rear direction of the projection apparatus 100.

Illustratively, the heat pipe 602 extends through the third heat dissipating fin 6031c and is welded to the third heat dissipating fin 6031c.

Illustratively, as shown in fig. 4, the surface of the carrier plate 2 facing the first receiving cavity 1011 is a bearing surface 201, and one end of the third heat dissipating fin 6031c near the carrier plate 2 may be connected to the bearing surface 201 through a connecting plate and a connecting member.

As one possible implementation, referring to fig. 8, in some embodiments, the at least one heat pipe 602 comprises a first heat pipe 6021 comprising a first straight section 60211, a second straight section 60212, and a bent section 60213. The first straight tube section 60211 is located on the side of the second surface 6012 away from the first surface 6011, and the first straight tube section 60211 penetrates through the plurality of first heat dissipation fins 6031a, the plurality of second heat dissipation fins 6031b and the plurality of third heat dissipation fins 6031c. The second straight tube section 60212 is located on the peripheral side of the laser light source 3 and the heat conductive member 601, and penetrates through the plurality of third heat radiation fins 6031c. The bent tube section 60213 is connected between the first straight tube section 60211 and the second straight tube section 60212. By such design, the contact area between the first heat pipe 6021 and the third heat dissipation fin 6031c can be increased, and the heat exchange efficiency between the first heat pipe 6021 and the third heat dissipation fin 6031c is further improved, so that the heat dissipation efficiency of the heat dissipation system 6 for the laser light source 3 is improved.

Illustratively, the first straight tube portion 60211 is connected to the heat conducting member 601, the plurality of first heat dissipating fins 6031a, the plurality of second heat dissipating fins 6031b, and the plurality of third heat dissipating fins 6031c by welding.

In order to improve the heat dissipation efficiency of the heat dissipation system 6 for the laser light source 3, referring to fig. 8, in some embodiments, the plurality of heat dissipation fins 6031 further includes a plurality of fourth heat dissipation fins 6031d. A plurality of fourth heat dissipation fins 6031d are disposed on the circumferential sides of the laser light source 3 and the heat conducting member 601 and connected to the carrying surface 201 (as shown in fig. 4). The at least one heat pipe 602 includes a second heat pipe 6022, and one end of the second heat pipe 6022 is connected to the heat conductive member 601 and the other end is connected to the plurality of fourth heat dissipation fins 6031d. By such design, the space around the laser light source 3 and the heat conducting member 601 can be fully utilized to increase the number of the heat dissipating fins 6031, thereby improving the heat dissipating efficiency of the heat dissipating system 6 for the laser light source 3.

Illustratively, the fourth heat fins 6031d may be parallel to the back-up face 201.

For example, a plurality of fourth heat dissipation fins 6031d may be provided on the front side of the laser light source 3.

Illustratively, the fourth plurality of heat dissipating fins 6031d may be coupled to the load face 201 by connection plates and connections.

Illustratively, one end of the second heat pipe 6022 is welded to the heat conducting member 601, and the other end thereof penetrates through the plurality of fourth heat dissipating fins 6031d and is welded to the fourth heat dissipating fins 6031d.

Illustratively, the at least one heat pipe 602 further includes a third heat pipe 6023 extending in a straight line, the third heat pipe 6023 penetrating and welded with the plurality of first fins 6031a, the plurality of second fins 6031b, and the plurality of third fins 6031c.

To improve the heat dissipation efficiency of the heat dissipation system 6, referring to fig. 3, in some embodiments, the first casing 1 includes the second casing wall 103 and the fourth casing wall 105, which are oppositely disposed, and the fourth casing wall 105 is closer to the heat dissipation fin group 603 than the second casing wall 103. The second housing wall 103 is formed with a first heat dissipation hole 1031, and the fourth housing wall 105 is formed with a second heat dissipation hole 1051. The heat dissipation system 6 further includes: at least one fan 604 is disposed in the first receiving cavity 1011 and mounted on the carrying surface 201 of the carrying plate 2, the fan 604 is located between the heat dissipating fin set 603 and the fourth housing wall 105, and the fan 604 is used for driving an airflow to flow from one of the first heat dissipating hole 1031 and the second heat dissipating hole 1051 to the other. With such a design, the fan 604 drives the airflow to flow, so that the heat inside the first casing 1 can be quickly exhausted out of the device, thereby improving the heat dissipation efficiency of the heat dissipation system 6.

For example, sound holes may be further formed in the second housing wall 103 and the fourth housing wall 105, and the sound emitting directions of the two speakers 702 of the sound box 7 are respectively directed toward the second housing wall 103 and the fourth housing wall 105.

Illustratively, the number of fans 604 may be one; alternatively, the number of the fans 604 may be two, and both may be applied.

Illustratively, the fourth housing wall 105 may be located on the suction side of the fan 604; alternatively, the fourth housing wall 105 may be located on the air outlet side of the fan 604.

Illustratively, the fan 604 may be mounted on the bearing surface 201 by a fan support 605.

In order to properly route and dissipate heat from the circuit boards 8, referring to fig. 3, in some embodiments, the projection device 100 further includes a plurality of circuit boards 8 and a circuit board support 9. A plurality of circuit boards 8 are disposed on the carrier plate 2. The circuit board support 9 is connected to the carrier plate 2. At least one circuit board 8 is mounted on the circuit board support 9 and perpendicular to the carrier plate 2, i.e. perpendicular to the carrier surface 201. By such a design, the plurality of circuit boards 8 may be reasonably disposed in the space of the first casing 1, so that the structure of the projection apparatus 100 is compact, and the circuit boards 8 may be perpendicular to the air outlet surface of the fan 604, so as to utilize the airflow driven by the fan 604 to perform air cooling and heat dissipation on the circuit boards 8.

For example, the circuit board support 9 may be plate-shaped and perpendicular to the carrier plate 2, and the circuit board support 9 may be clamped with an end of the carrier plate 2 away from the light exit surface of the lens 5 (as shown in fig. 5).

Illustratively, the plurality of circuit boards 8 may include a main board 801, a display board 802 and a driving board 803, wherein the main board 801 and the display board 802 may be respectively mounted on two main surfaces of the circuit board support 9 by a screw connector, i.e., the main board 801 and the display board 802 are perpendicular to the carrier board 2, and the driving board 803 may be connected to a surface (the carrier surface 201) of the carrier board 2 facing the first receiving cavity 1011 by a screw connector, i.e., the driving board 803 is parallel to the carrier board 2.

To optimize the electromagnetic compatibility of projection device 100, referring to fig. 5, in some embodiments, projection device 100 further comprises: and a plurality of conductive connectors 10 connected between the circuit board support 9 and the first housing 1. By the design, the conductivity of the whole projection device 100 is excellent, the electromagnetic problem of the projection device 100 is effectively optimized, the circuit board 8 is mounted, an extra grounding screw locking point is not needed to be added to ensure the grounding effect, and the design, manufacturing and processing are simplified.

Illustratively, the circuit board support 9 has a main body 901 and a connecting portion 902, the main body 901 is clamped with the carrier board 2, and the connecting portion 902 is perpendicular to the main body 901 and connected to the bottom case 106, the second housing wall 103 and the fourth housing wall 105 through the conductive connecting member 10.

Illustratively, the conductive connector 10 may be a conductive bolt; alternatively, the conductive connection member 10 may also be composed of a connection column riveted to the connection portion 902 and a conductive bolt connected between the bottom case 106, the second housing wall 103, and the fourth housing wall 105 and the connection column.

As a possible implementation, referring to fig. 10, in some embodiments, the first fixture 1101 has a cylindrical shape, one end of the first fixture 1101 is connected to the carrier plate 2, and the first fixture 1101 has a first threaded hole 11011 extending in an axial direction. The optical engine 010 has a plurality of first mounting holes 401 thereon. The first connecting assembly 11 further includes a plurality of first connecting members 1103, one end of one first connecting member 1103 passes through one first mounting hole 401 and is screwed with the first threaded hole 11011, and the other end of the one first connecting member 1103 abuts against the edge of one side of the first mounting hole 401 far away from the carrier plate 2. So design, through threaded connection's mode, can realize connecting optical engine 010 on loading board 2, be convenient for installation and maintenance are dismantled.

Illustratively, the first fixing member 1101 may be a nut post, and the first fixing member 1101 and the bearing plate 2 may be screwed; alternatively, the first fixing member 1101 and the carrier plate 2 may also be riveted; alternatively, the first fixing member 1101 and the carrier plate 2 may be welded, and both may be applied.

For example, the first connector 1103 may be a screw.

Specifically, referring to fig. 10, in some embodiments, the carrier plate 2 is formed with a plurality of first riveting holes 202, and the first riveting holes 202 penetrate through the carrier plate 2. An end of the first fixing member 1101 close to the second receiving cavity 1012 passes through one of the first riveting holes 202 and is then riveted on the carrier plate 2. By the design, the first fixing part 1101 can be connected with the bearing plate 2 by adopting simpler stamping and riveting process equipment, and the connection is reliable, the component deformation is small, the fatigue resistance is good, the sensitivity to stress concentration is low, and the reliability is high.

For example, the inner diameter of the first staking hole 202 may be the same as the outer diameter of the first fixture 1101.

As a possible implementation, referring to fig. 9, in some embodiments, the first supporting member 1102 has a cylindrical shape, one end of the first supporting member 1102 is connected to the loading plate 2, and the other end is abutted against the optical engine 010. By such design, the supporting end surface of the first supporting member 1102 can be a plane, the supporting area is large, the supporting is reliable, and in addition, the cylindrical first supporting member 1102 is convenient for design and installation.

For example, the first support 1102 may be cylindrical in shape throughout; alternatively, the first support 1102 may have other shapes and may be used.

Specifically, referring to fig. 10, in some embodiments, the carrier plate 2 is formed with a plurality of second riveting holes 203, and the second riveting holes 203 penetrate through the carrier plate 2. The first support 1102 includes a first body 11021 and a first rivet 11022. The first body 11021 is cylindrical, and a portion of one of the first bodies 11021 is located in one of the second staking holes 203. The first riveting portion 11022 is disposed on the outer peripheral surface of the first body 11021, and the first riveting portion 11022 is located on one side of the loading plate 2 close to the first accommodating cavity 1011 and is riveted on the loading plate 2. By the design, the first support member 1102 can be connected with the bearing plate 2 by adopting simpler stamping and riveting process equipment, and the connection is reliable, the deformation of the components is small, the fatigue resistance is good, the connection is insensitive to stress concentration, and the reliability is high. In addition, first riveting portion 11022 is riveted in the one side that is close to first holding chamber 1011 of loading board 2, the tip riveting of first mounting 1101 is in the one side that is close to second holding chamber 1012 of loading board 2, make projection apparatus 100 no matter be in the forward of normal use state and place, still be in the reverse of transportation, the main surface of loading board 2 can both provide the holding power for optical engine 010 (the overall structure that laser source 3, ray apparatus 4 and camera lens 5 are connected), the frictional force that the component inflation that combines to form riveted structure department produced, the connection between optical engine 010 and loading board 2 is more firm.

For example, the outer diameter of the first body 11021 may be the same as the inner diameter of the second staking hole 203. One end of the first body 11021 located in the first accommodating cavity 1011 abuts against the laser light source 3 or the optical engine 4.

For example, the first riveting portion 11022 may have a convex structure, and the convex structure may be continuous or discontinuous, and may be applied.

More specifically, referring to fig. 11, the first body 11021 includes a support section 11021a and a connection section 11021b. The connecting section 11021b is matched with the second riveting hole 203; the diameter of the connecting section 11021b is smaller than that of the supporting section 11021a, and the first riveting portion 11022 is disposed on the outer circumferential surface of the connecting section 11021b and connected with the supporting section 11021 a. By such a design, the area of the supporting surface of the optical engine 010 by the first supporting member 1102 can be as large as possible while the first supporting member 1102 is riveted with the carrier plate 2, so as to provide a stable supporting force for the optical engine 010.

For example, the first support 1102 may be an integrally formed piece.

More specifically, referring to fig. 11, in some embodiments, the first rivet 11022 is disposed around the connection section 11021b, and the diameter of the first rivet 11022 is smaller than the diameter of the support section 11021 a. Due to the design, the first supporting member 1102 can be riveted on the loading plate 2, and the contact area between the members forming the riveting structure can be as large as possible, so that the connection between the first supporting member 1102 and the loading plate 2 is more reliable.

In order to avoid the components in the second receiving cavity 1012 and to ensure the overall flatness of the carrier plate 2, in some embodiments, the carrier plate 2 has a plurality of bosses 204 protruding toward the first receiving cavity 1011, and the thickness of the bosses 204 is the same as that of the carrier plate 2 in the direction perpendicular to the carrier plate 2, see fig. 9. A connector assembly 11 is disposed on one of the bosses 204. By the design, the riveting connection between the first fixing piece 1101 and the first support piece 1102 in one connecting assembly 11 and the bearing plate 2 can be realized more easily, and the influence of the deformation of the material of the bearing plate 2 at the connecting area on the integral flatness of the bearing plate 2 in the riveting process between the first fixing piece 1101 and the first support piece 1102 and the bearing plate 2 can be reduced as much as possible; in addition, the recessed area formed by the boss 204 on the surface of the loading plate 2 near the second receiving cavity 1012 can make the first fixing member 1101 and the first support member 1102 escape from the components in the second receiving cavity 1012 (as shown in fig. 10).

Illustratively, the bosses 204 may be formed by stamping the carrier plate 2.

As a possible implementation, referring to fig. 4, in some embodiments, the first casing 1 includes the aforementioned bottom casing 106. The bottom shell 106 is disposed opposite to the loading plate 2, and the bottom shell 106 is a partial cavity wall of the second accommodating cavity 1012. The projection apparatus 100 further includes a plurality of second connecting members 12, and the plurality of second connecting members 12 connect the loading plate 2 and the bottom case 106. The second connecting assembly 12 includes a second fixing member 1201 and a second supporting member 1202. One end of the second fixing member 1201 is connected to the bottom case 106; the end of the other end penetrates the bearing plate 2 and is riveted on the bearing plate 2. The second support 1202 includes a second body 12021 and a second rivet (not shown), one end of the second body 12021 abuts against the bottom case 106, and the other end penetrates through the carrier plate 2. The second riveting portion is disposed on the outer peripheral surface of the second main body portion 12021, and the second riveting portion is located on one side of the carrier plate 2 close to the second receiving cavity 1012 and is riveted on the carrier plate 2.

By adopting the design, the connection between the second fixing part 1201 and the second supporting part 1202 and the bearing plate 2 can be realized by adopting simpler stamping and riveting process equipment, and the connection is reliable, the component deformation is small, the fatigue resistance performance is good, the insensitivity to stress concentration is realized, and the reliability is high. In addition, the second riveting portion is riveted on one side of the loading board 2 close to the second accommodating cavity 1012, the end portion of the second fixing member 1201 is riveted on one side of the loading board 2 close to the first accommodating cavity 1011, so that the projection apparatus 100 is in a forward placing state during normal use, or in a flip-chip state, or in a falling collision condition easily occurring in the transportation process, the second fixing member 1201 and the second supporting member 1202 can provide supporting force and pulling force for the loading board 2 and parts connected thereto, friction force generated by expansion of members forming the riveting structure is combined, and connection between the bottom case 106 and the loading board 2 is more stable.

The detailed structure of the second fixing member 1201 is approximately consistent with that of the first fixing member 1101, and the detailed structure of the second supporting member 1202 is approximately consistent with that of the first supporting member 1102, which are not described herein again.

In order to protect the lens 5 from dust, referring to fig. 12, in some embodiments, the first housing 1 further includes the aforementioned first housing wall 102. The first housing wall 102 has a light-transmitting portion 1021, and the light-transmitting portion 1021 is used for transmitting the light beam emitted from the lens 5. The end of the lens 5 close to the first housing wall 102 is a second end 501. The second end 501 belongs to the focusing group of the lens 5 and can be close to or far away from the first shell wall 102 along the direction perpendicular to the first shell wall 102. The projection apparatus 100 further includes a first dust prevention member 13 and a second dust prevention member 14. The first dust-proof component 13 is disposed on a side of the first housing wall 102 close to the lens 5, and is connected to the first housing wall 102 (as shown in fig. 13). The first dust-proof piece 13 is arranged around the second end 501; in a direction perpendicular to the first wall 102, the height of the first dust-proof component 13 is greater than the distance between the second end 501 and the first wall 102. The second dust-proof member 14 is disposed on the second end 501, and disposed around the second end 501, and at least a part of the second dust-proof member 14 is located between the lens 5 and the first dust-proof member 13 (as shown in fig. 13).

With such a design, the second end 501 of the lens 5 can approach or depart from the first shell wall 102 along a direction perpendicular to the first shell wall 102, so that the focal length of the lens 5 can be adjusted, and the display effect of the projection image on the projection screen 200 can be adjusted; by connecting the first dust-proof component 13 with the first housing wall 102, the first dust-proof component 13 is arranged around the second end 501, and the height in the direction perpendicular to the first housing wall 102 is greater than the distance between the second end 501 and the first housing wall 102, so that the first dust-proof component 13 can prevent dust from entering between the second end 501 and the first housing wall 102 from the radial direction of the lens 5; by arranging the second dust-proof piece 14 on the second end 501 and around the second end 501, at least a part of the second dust-proof piece 14 is located between the lens 5 and the first dust-proof piece 13, so that the second dust-proof piece 14 can prevent dust from entering between the first end 501 and the first shell wall 102 from the axial direction of the lens 5, thereby realizing dust protection of the lens 5. In addition, by arranging the first dust-proof piece 13 and the second dust-proof piece 14 at the first shell wall 102 and the second end 501 of the lens 5 respectively, a reasonable gap can be reserved between the first dust-proof piece 13 and the second dust-proof piece 14 through structural design, so that the first dust-proof piece 13 and the second dust-proof piece 14 can be attached to approximately close the space between the second end 501 and the first shell wall 102, and the first dust-proof piece 13 and the second dust-proof piece 14 can be kept from contacting to prevent lens fogging.

For example, the first dust-proof component 13 may be adhered to the first housing wall 102; alternatively, the first dust-proof component 13 may be connected to the first housing wall 102 by a screw connection; alternatively, the first dust-proof component 13 may be clamped to the first housing wall 102, and both can be used.

Illustratively, the second dust prevention member 14 may be detachably attached to the second end 501 of the lens 5; alternatively, the second dust-proof component 14 may be adhered to the second end 501 of the lens 5.

For example, the second dust prevention member 14 may be entirely located between the lens 5 and the first dust prevention member 13; alternatively, the second dust-proof member 14 may be partially disposed between the lens 5 and the first dust-proof member 13, and may be applied.

For example, the second dust-proof piece 14 may be attached to the first dust-proof piece 13 on the premise of ensuring normal focusing of the lens 5; alternatively, the second dust-proof member 14 may have a gap with the first dust-proof member 13, and may be applied.

Illustratively, the optical axis of the lens 5 may extend in a direction perpendicular to the first housing wall 102.

For example, the height of the first dust-proof component 13 along the direction perpendicular to the first housing wall 102 may be 10mm, so that dust-proof can be achieved without affecting the lens assembly.

In order to prevent the lens 5 from being atomized and affecting the projection display effect, in some embodiments, the first dust-proof component 13 and the second dust-proof component 14 are both annular, and a minimum gap between an inner sidewall of the first dust-proof component 13 and an outer sidewall of the second dust-proof component 14 is 2mm to 3mm. By adopting the design, not only can a better dustproof effect be realized, but also the space between the second end 501 of the lens 5 and the first shell wall 102 can be prevented from being sealed to cause lens atomization.

For example, the cross-section of the first dust-proof piece 13 and the second dust-proof piece 14 may be both circular rings.

For example, the axis of the first dust-proof member 13 and the axis of the second dust-proof member 14 may be collinear with the optical axis of the lens 5.

For example, the minimum gap between the inner sidewall of the first dust-proof piece 13 and the outer sidewall of the second dust-proof piece 14 may be 2mm or 2.5mm or 3mm.

To facilitate assembly of the lens 5, in some embodiments, the second dust guard 14 is removably coupled to the second end 501 of the lens 5. Thus, the lens 5 can be easily assembled and the second dust-proof member 14 can be easily replaced.

For example, the second dust-proof member 14 may be clamped to the second end 501 of the lens 5; alternatively, the second dust-proof member 14 may be screwed to the second end 501 of the lens 5, and may be used.

As one possible implementation, referring to fig. 13, in some embodiments, the second end 501 has a first snap-in portion 5011 on its outer circumferential surface. The second dust-proof member 14 includes a third body portion 1401, a second snap portion 1402, and a dust-proof portion 1403. The third body 1401 is disposed on the outer surface of the second end 501. The second clamping portion 1402 is connected to an end of the third main body 1401 away from the first housing wall 102; the second clip portion 1402 clips to the first clip portion 5011. The dust-proof part 1403 is connected to the edge of the third body part 1401 close to the first housing wall 102 and is located between the first dust-proof piece 13 and the third body part 1401. With such a design, the second dust-proof component 14 can be conveniently and rapidly mounted on the second end 501 of the lens 5, and the second dust-proof component 14 can be conveniently and rapidly detached from the lens 5.

Illustratively, the main body 1401 may be a thin-walled cylinder, which is easy to process and fit around the second end 501.

For example, one of the first and second clamping portions 5011 and 1402 may be a clamping hole, and the other may be a clamping hook; alternatively, the first clip part 5011 and the second clip part 1402 may have other types of clip structures and may be applied.

For example, the second dust-proof component 14 may be an integrally formed structure.

Specifically, referring to fig. 13, in some embodiments, the first snap-in portion 5011 is a first limit step. As shown in fig. 14, the second engaging portion 1402 includes at least three engaging cantilever arms 14021 and at least three engaging protrusions 14022. At least three clamping cantilever arms 14021 are arranged at intervals along the circumference of the third main body portion 1401, and the clamping cantilever arms 14021 extend from the edge of the third main body portion 1401 far away from the first shell wall 102 to the direction far away from the first shell wall 102. A clamping protrusion 14022 is disposed on a side of the clamping cantilever 14021 close to the second end 501, and a surface of the clamping protrusion 14022 close to the first housing wall 102 abuts against a step surface of the first limit step. Due to the design, the clamping cantilever 14021 has elasticity, so that the third main body 1401 can be sleeved into the first end 501 from the side of the first end 501 close to the first shell wall 102 and pushed in the direction far away from the first shell wall 102 until the clamping protrusion 14022 abuts against the step surface of the first limiting step, and therefore, the second dust-proof part 14 can be installed simply and conveniently.

Illustratively, the number of the clamping cantilever 14021 can be four, and the clamping cantilever 14021 can be equally spaced along the circumference of the third main body part 1401.

To prevent lens 5 from being damaged by impact, in some embodiments, projection device 100 further includes a shock absorber 15, see fig. 12. The shock absorbing member 15 is disposed between the second dust-proof member 14 and the first housing wall 102, and is connected to the second dust-proof member 14 (as shown in fig. 13). The shock absorbing member 15 is disposed around the second end 501 of the lens 5. By the design, the shock absorbing member 15 can prevent dust from entering the space between the second end 501 and the first shell wall 102 from the radial direction of the lens 5, and can also play a shock absorbing role, namely, when the lens 5 is assembled in a workshop and the whole machine falls off in transportation, the lens 5 cannot be damaged even if the lens 5 touches the first shell wall 102. The thickness of the shock absorber 15 can be selected according to the tolerance of the lens 5 and the components, generally, the thicker the shock absorber 15 is, i.e. the closer to the first wall 102, the better the dustproof effect is, but it is determined by the moving distance of the second end 501 of the actual lens 5 relative to the first wall 102, so as to prevent the self-focusing function of the lens 5 from being affected by the too close distance of the shock absorber 15 from the first wall 102.

For example, the shock absorbing member 15 may be adhered to the second dust-proof member 14.

In some embodiments, when the distance between the second end 501 and the first housing wall 102 is the smallest, the distance between the shock absorber 15 and the first housing wall 102 is greater than zero. By adopting the design, the shock absorption function of the shock absorption member 15 is ensured, and the lens atomization caused by the space between the second end 501 and the first shell wall 102 sealed by the shock absorption member 15 is prevented.

For example, the distance between the shock absorbing member 15 and the first housing wall 102 may be 1mm to 2mm, for example, the distance between the shock absorbing member 15 and the first housing wall 102 may be 1mm or 1.5mm or 2mm.

As one possible implementation, referring to fig. 12, in some embodiments, the cushioning members 15 are annular. The second dust-proof member 14 has a second limit step 1404 (as shown in fig. 13) on the surface thereof adjacent to the first housing wall 102, the second limit step 1404 has an annular shape, and the shock absorbing member 15 is mounted on the step surface of the second limit step 1404. By the design, the shock absorption piece 15 is convenient to position and mount, and the shock absorption piece 15 can be prevented from shifting to shield the light beam emitted by the lens 5 when the lens 5 collides with the first shell wall 102.

Illustratively, the axis of the shock absorber 15 may be collinear with the optical axis of the lens 5.

To enhance the aesthetic appearance of projection device 100, in some embodiments, first housing wall 102 includes a housing wall body 1022 and a glass cover 1023, see fig. 12. The housing wall body 1022 has a light hole 1024. The glass cover plate 1023 is installed at the light-transmitting hole 1024 and connected with the housing wall body 1022. The light-transmitting hole 1024 and the glass cover plate 1023 form a light-transmitting portion 1021. By such a design, the light beam can be ensured to pass through the first housing wall 102, and the appearance of the projection apparatus 100 is good.

Illustratively, as shown in fig. 13, the glass cover plate 1023 may be attached to the wall body 1022 by a retaining ring 1025.

In some embodiments, the first dust-proof component 13 and the shock absorbing component 15 are made of foam. Therefore, the first dust-proof part 13 and the shock absorption part 15 both have certain elasticity, and have light weight and reliable performance.

For example, the first dust-proof component 13 and the shock absorbing component 15 may be made of Ethylene Propylene Diene Monomer (EPDM), which has good oxidation and corrosion resistance and is not easily deformed.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A projection device, comprising:

a first housing;

the bearing plate is arranged in the first shell and divides the space in the first shell into a first accommodating cavity and a second accommodating cavity;

the optical engine is arranged in the first accommodating cavity;

a plurality of first connection assemblies connected between the optical engine and the carrier plate; the first connection assembly includes:

the first fixing piece is arranged on the bearing plate and is connected with the optical engine;

the first supporting piece is arranged on the bearing plate and located on the periphery of the first fixing piece, and one end, far away from the bearing plate, of the first supporting piece is abutted to the optical engine.

2. The projection device of claim 1,

the first fixing piece is cylindrical, one end of the first fixing piece is connected with the bearing plate, and the first fixing piece is provided with a first threaded hole extending along the axis direction;

the optical engine is provided with a plurality of first mounting holes;

the first connecting assembly further comprises a plurality of first connecting pieces, one end of each first connecting piece penetrates through one first mounting hole to be screwed with the first threaded hole, and the other end of each first connecting piece is abutted to the edge of one side, far away from the bearing plate, of the first mounting hole.

3. The projection device of claim 2,

the bearing plate is provided with a plurality of first riveting holes, and the first riveting holes penetrate through the bearing plate;

and the end part of one first fixing piece close to the second accommodating cavity penetrates through one first riveting hole and then is riveted on the bearing plate.

4. The projection device of any of claims 1-3,

the first supporting piece is cylindrical, one end of the first supporting piece is connected with the bearing plate, and the other end of the first supporting piece is abutted to the optical engine.

5. The projection device of claim 4,

the bearing plate is provided with a plurality of second riveting holes, and the second riveting holes penetrate through the bearing plate;

the first support member includes:

a first body having a cylindrical shape, a portion of one of the first bodies being located in one of the second rivet holes;

the first riveting part is arranged on the outer peripheral surface of the first body, is positioned on one side of the bearing plate close to the first accommodating cavity and is riveted on the bearing plate.

6. The projection device of claim 5, wherein the first body comprises:

a support section; and

the connecting section is matched with the second riveting hole; the diameter of the connecting section is smaller than that of the supporting section, and the first riveting portion is arranged on the outer peripheral surface of the connecting section and connected with the supporting section.

7. The projection device of claim 6,

the first riveting portion is arranged around the connecting section in a circle, and the diameter of the first riveting portion is smaller than that of the supporting section.

8. The projection device of claim 5,

the bearing plate is provided with a plurality of bosses protruding towards the first accommodating cavity, and the thickness of the bosses is the same as that of the bearing plate in the direction perpendicular to the bearing plate;

one of the connection assemblies is disposed on one of the bosses.

9. The projection device of any of claims 1-3,

the first housing includes: the bottom shell is arranged opposite to the bearing plate and is a partial cavity wall of the second accommodating cavity;

the projection equipment also comprises a plurality of second connecting components, a plurality of first connecting components and a plurality of second connecting components, wherein the second connecting components are connected with the bearing plate and the bottom shell; the second connection assembly includes:

one end of the second fixing piece is connected with the bottom shell; the end part of the other end penetrates through the bearing plate and is riveted on the bearing plate;

the second supporting piece comprises a second main body part and a second riveting part, one end of the second main body part is abutted with the bottom shell, and the other end of the second main body part penetrates through the bearing plate; the second riveting part is arranged on the outer peripheral surface of the second main body part, is positioned on one side of the bearing plate close to the second accommodating cavity and is riveted on the bearing plate.

10. The projection device of any of claims 1-3, wherein the projection device further comprises:

and the sound box is arranged in the second accommodating cavity and is connected with the first shell.

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