CN114624944A - Projection device - Google Patents

Abstract

The invention relates to a projection device, which comprises a shell, an optical machine, a lens component, a first sound device and a second sound device, wherein the optical machine, the lens component, the first sound device and the second sound device are arranged in the shell, the lens component comprises a lens, a focusing ring and a driving device, a mounting hole is formed in the light-emitting side of the optical machine, one end of the lens is mounted in the mounting hole, the focusing ring is sleeved on the lens, the first sound device and the second sound device are respectively arranged on two opposite sides of the lens, the driving device is detachably arranged on one side of the lens and is positioned between the first sound device and the second sound device, and the driving device is connected with the focusing ring and is used for driving the focusing ring and the lens to rotate so as to drive the lens to move back and forth along the axis direction of the driving device. Through setting up drive arrangement detachably in one side of camera lens and being located between first stereo set and the second stereo set, can make full use of the clearance between first stereo set and the second stereo set for compact structure, it is small, drive arrangement also conveniently dismantles in addition, can realize the nimble selection of automatic focusing and manual focusing dual mode.

Description

Projection device

Technical Field

The invention relates to the technical field of projection, in particular to projection equipment.

Background

The lens of the projection apparatus is mainly used for magnifying and projecting an image formed by an imaging device in the projection apparatus onto a projection screen, and when the distance between the screen and the imaging device is different, the relative position of the lens between the screen and the imaging device needs to be adjusted, so that the picture of the imaging device can be clearly imaged on the projection screen, which is called as focusing of the lens.

Generally, the focus of a lens of a projection device is either manually focused or electrically focused. The lens of the common LCD projection equipment is large in size, devices such as a sound box and the like are arranged in the shell, the space in the shell is limited, and if the electric focusing function is to be realized, the stacking difficulty of the devices is large, so that the miniaturization of the LCD projection equipment is not facilitated.

Disclosure of Invention

Based on this, it is necessary to provide a projection apparatus to solve the problem that the conventional projection apparatus is bulky for realizing the motorized focusing function.

The utility model provides a projection equipment, includes the casing and sets up ray apparatus, camera lens subassembly, first stereo set and the second stereo set in the casing, the camera lens subassembly includes camera lens, focusing ring and drive arrangement, the light-emitting side of ray apparatus is opened and is equipped with the mounting hole, the one end of camera lens install in the mounting hole, focusing ring cover is located the camera lens, first stereo set and second stereo set are located respectively the relative both sides of camera lens, drive arrangement detachably set up in one side of camera lens just is located between first stereo set and the second stereo set, drive arrangement with the focusing ring is connected, is used for the drive focusing ring and camera lens rotate, in order to drive the camera lens is along its axis direction back-and-forth movement.

In one embodiment, the lower parts of the first sound device and the second sound device extend downwards beyond the lower side of the lens to form an accommodating space, and the driving device is located below the lens and in the accommodating space.

In one embodiment, a light emitting cylinder protruding forward is arranged on the light emitting side of the optical machine, and the mounting hole is formed in the light emitting cylinder; first stereo set and second stereo set orientation the partly shaping in side of a light-emitting section of thick bamboo has the arcwall face, first stereo set and second stereo set pass through respectively the arcwall face embraces the both sides of locating a light-emitting section of thick bamboo, lie in on first stereo set and the second stereo set the part of arcwall face below with the downside of a light-emitting section of thick bamboo encloses establishes the formation accommodation space.

In one embodiment, the projection apparatus further includes a first bracket and a heat dissipation assembly, the heat dissipation assembly is fixed to the optical engine and located below the light emitting tube, the first bracket is mounted on the heat dissipation assembly, and the driving device is mounted on the first bracket and located between the light emitting tube and the heat dissipation assembly.

In one embodiment, the heat dissipation assembly includes a heat conduction substrate, a heat conduction pipe and a heat sink, one side of the heat conduction substrate is attached to the optical machine, one end of the heat conduction pipe is connected to the side of the heat conduction substrate away from the optical machine, the other end of the heat conduction pipe is connected to the heat sink, the lower portion of the first support is installed on the side of the heat conduction substrate away from the optical machine, and the driving device is installed on the upper portion of the first support.

In one embodiment, the driving device comprises a driving motor and a gear arranged at the output end of the driving motor, and the outer wall of the focusing wheel is provided with matching teeth meshed with the gear; the inner wall of focusing ring is equipped with the edge the axis direction of camera lens extends the guide way that sets up, the outer wall of camera lens is equipped with spacing post, the focusing ring cover is located the camera lens outside just spacing post is located in the guide way, the gear drives when the focusing wheel rotates, spacing post can be followed the guide way removes.

In one embodiment, the lens is in threaded connection with the inner wall of the mounting hole; or, the lens assembly further comprises a fixing ring, the fixing ring is fixed in the mounting hole, and the fixing ring is in threaded connection with the lens.

In one embodiment, the projection apparatus further includes a second bracket and an inductive switch installed on the second bracket, the second bracket is fixed to the optical engine and located above the lens, the inductive switch is located at the periphery of the focusing wheel, a blocking piece extending along the circumferential direction of the focusing ring is arranged on the outer wall of the focusing ring, the blocking piece has a first end and a second end, the first end and the second end can trigger the inductive switch, the blocking piece can correspond to the inductive switch when the focusing ring rotates, and the inductive switch is electrically connected to the driving device.

In one embodiment, the housing is provided with a window corresponding to the lens, a first limiting portion is arranged on the inner side of the housing, the first limiting portion is arranged around the window, one end of the light-emitting tube facing the window is provided with a second limiting portion, one side of the focusing ring is abutted against the first limiting portion, and the other side of the focusing ring is abutted against the second limiting portion so as to limit the focusing ring to move back and forth along the axial direction of the lens.

In one embodiment, the projection apparatus further includes a front cover decoration, the front cover decoration is provided with a light hole corresponding to the window, the front cover decoration is mounted on the outer side of the housing, and the first limiting portion is disposed on the inner side of the front cover decoration and abuts against the focusing ring through the window;

and/or, the first limiting part comprises an annular bulge, one side of the focusing ring, which faces the first limiting part, is provided with an annular groove, and the annular bulge is inserted into the annular groove.

Above-mentioned projection equipment, through setting up drive arrangement detachably in one side of camera lens and being located between first stereo set and the second stereo set, rotate through drive arrangement drive focusing ring, and then drive the camera lens of establishing with focusing ring cover and rotate to make the camera lens realize automatic focusing along its axis direction back-and-forth movement, make full use of the clearance between first stereo set and the second stereo set, compact structure, small, drive arrangement also conveniently dismantles, can realize the nimble selection of automatic focusing and manual focusing dual mode, satisfy different customers' demand.

Drawings

FIG. 1 is an exploded view of a projection device according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a first viewing angle of a projection apparatus according to an embodiment of the present application;

FIG. 3 is a diagram illustrating a second viewing angle (with the first speaker removed) of a projection apparatus according to an embodiment of the disclosure;

fig. 4 is a schematic diagram of a third viewing angle (with the first speaker removed) of the projection apparatus according to an embodiment of the present application;

fig. 5 is a schematic diagram of a fourth viewing angle (with the first speaker removed) of the projection apparatus according to an embodiment of the present application;

FIG. 6 is a schematic cross-sectional view of a projection apparatus according to an embodiment of the present application;

fig. 7 is a partially enlarged schematic view of fig. 6.

FIG. 8 is a schematic view of a second stand of a projection device according to an embodiment of the present application;

fig. 9 is a schematic view of a front cover trim of a projection apparatus according to an embodiment of the present application.

Description of reference numerals:

10. a housing; 110. a front housing; 101. a window; 120. a rear housing; 122. a first sound outlet; 124. a second sound outlet; 126. a focus aperture; 130. a front cover decoration; 103. a light-transmitting hole; 132. a first limiting part; 134. inserting a ring; 20. a light machine; 201. mounting holes; 210. a light-emitting tube; 212. a second limiting part; 31. a lens; 310. a limiting column; 32. a fixing ring; 40. a focusing ring; 410. a guide groove; 420. a baffle plate; 421. a first end; 422. a second end; 430. matching teeth; 440. a slot; 50. a drive device; 510. a drive motor; 520. a gear; 61. a first sound device; 62. a second sound box; 601. an arc-shaped surface; 602. an upper fixing portion; 603. a lower fixing portion; 71. a second bracket; 710. a first mounting portion; 711. a connecting portion; 712. a second mounting portion; 72. an inductive switch; 80. a first bracket; 90. a heat dissipating component; 91. a thermally conductive substrate; 92. a heat conducting pipe; 93. a heat sink.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "first," "second," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.

Furthermore, 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 at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "first," "second," and the like are for purposes of illustration only and do not denote a single embodiment.

Referring to fig. 1, an embodiment of the present application provides a projection apparatus, which includes a housing 10, and an optical engine 20, a lens 31 assembly, a first speaker 61, and a second speaker 62 disposed in the housing 10. The lens 31 assembly includes a lens 31, a focus ring 40 and a driving device 50. Referring to fig. 2 and 3, a mounting hole 201 is formed on the light exit side of the optical machine 20, one end of the lens 31 is mounted in the mounting hole 201, and the focusing ring 40 is sleeved on the lens 31. The lens 31 and the focusing ring 40 can rotate synchronously relative to the optical engine 20, and the lens 31 can move along the axial direction.

Further, the first speaker 61 and the second speaker 62 are respectively disposed on opposite sides of the lens 31. The driving device 50 is detachably disposed at one side of the lens 31 and between the first sound 61 and the second sound 62. The driving device 50 is connected to the focusing ring 40 and is configured to drive the focusing ring 40 and the lens 31 to rotate, so as to drive the lens 31 to move back and forth along the axial direction of the lens.

Specifically, the projection apparatus is a single-chip LCD projection apparatus, since the LCD is used as the light modulator, the LCD area is larger than other types of modulators (DMD, etc.), so that a larger lens 31 needs to be used. The optical machine 20 is provided with an imaging device such as a light source and an LCD, an image formed by the imaging device is magnified and projected onto a projection screen through the lens 31, and when a projection picture is unclear, the focusing ring 40 can be driven by the driving device 50 to drive the lens 31 to move back and forth along the axis direction of the lens until the projection picture is clear.

The projection equipment of the embodiment, through with drive arrangement 50 detachably set up in one side of camera lens 31 and drive arrangement 50 is located between first stereo set 61 and the second stereo set 62, drive focusing ring 40 through drive arrangement 50 and rotate, and then drive the camera lens 31 of establishing with focusing ring 40 cover and rotate, so that camera lens 31 realizes automatic focusing along its axis direction back-and-forth movement, make full use of the clearance between first stereo set 61 and the second stereo set 62, make compact structure, small, and drive arrangement 50 also conveniently dismantles, can realize the flexible choice of automatic focusing and manual focusing two kinds of modes, satisfy different customers' demand.

Referring to fig. 2, further, the driving device 50 is located below the lens 31, lower portions of the first sound box 61 and the second sound box 62 extend downward beyond a lower side of the lens 31 to form an accommodating space, and the driving device 50 is located in the accommodating space. The driving device 50 is located in the accommodating space, and the use of other parts in the housing 10 is not affected. Because the lower parts of the first sound box 61 and the second sound box 62 exceed the lower side of the lens 31 downwards, the first sound box 61 and the second sound box 62 are ensured to have large enough volume, so that the first sound box 61 and the second sound box 62 can have better sound effect, and the driving device 50, the first sound box 61 and the second sound box 62 fully utilize the space below the lens 31, so that the structure is compact, and the volume of the projection equipment is favorably reduced. In other embodiments, the upper portions of the first sound box 61 and the second sound box 62 may extend upward beyond the upper side of the lens 31 to form an accommodating space, and the driving device 50 may be located above the lens 31 and in the accommodating space formed on the upper side of the lens 31.

Referring to fig. 1-5, in one embodiment, a light-emitting cylinder 210 protruding forward is disposed on a light-emitting side of the optical engine 20, and the mounting hole 201 is opened in the light-emitting cylinder 210. That is, the light emitting tube 210 is suspended from the front side of the optical engine 20. The first sound box 61 and the second sound box 62 are formed with arc surfaces 601 facing to a part of the side surfaces of the light emitting tube 210, and the first sound box 61 and the second sound box 62 are respectively embraced by the arc surfaces 601 at two sides of the light emitting tube 210. The portions of the first sound box 61 and the second sound box 62 located below the arc-shaped surface 601 and the lower side of the light emitting tube 210 enclose to form the accommodating space. By arranging a part of the side surfaces of the first sound box 61 and the second sound box 62 as the arc-shaped surface 601 matched with the outer surface of the light emitting tube 210, the first sound box 61 and the second sound box 62 are tightly attached to the light emitting tube 210 for assembly, so that the whole structure is more compact, and the space occupied by the first sound box 61 and the second sound box 62 in the shell 10 is reduced. The first sound box 61 and the second sound box 62 are both provided with an upper fixing portion 602 located above the arc-shaped surface 601 and a lower fixing portion 603 located below the arc-shaped surface 601, and the first sound box 61 and the second sound box 62 are connected with the optical machine 20 through the upper fixing portion 602 and the lower fixing portion 603. A gap is formed between the two lower fixing portions 603 below the light emitting tube 210; the driving device 50 is located below the light emitting tube 210.

In one embodiment, specifically referring to fig. 1 to 5, in one embodiment, the projection apparatus further includes a heat dissipation assembly 90, the heat dissipation assembly 90 is fixed to the optical engine 20, and the heat dissipation assembly 90 is disposed below the lens 31, specifically below the light-emitting tube 210. The heat sink 90 is used for dissipating heat generated by the optical engine 20, particularly heat generated by a light source in the optical engine 20. Further, the projection apparatus further includes a first bracket 80, and the first bracket 80 is mounted on the heat dissipation assembly 90. The driving device 50 is mounted on the first bracket 80 and located between the light emitting tube 210 and the heat sink 90. Usable projection equipment's radiator unit 90 fixes first support 80, wears to locate the hole site on first support 80 and radiator unit 90's hole site through the screw, makes first support 80 lock in radiator unit 90, and easy dismounting is in order to realize, can dispose according to the demand is nimble.

Referring to fig. 1 and 4, in particular, in one embodiment, the heat dissipation assembly 90 includes a heat conductive substrate 91, a heat conductive pipe 92, and a heat sink 93. One side of the heat conducting substrate 91 is attached to the optical machine 20, one end of the heat conducting pipe 92 is connected to the side of the heat conducting substrate 91 far away from the optical machine 20, and the other end of the heat conducting pipe 92 is connected to the heat sink 93. The lower portion of the first bracket 80 is mounted on the side of the heat conducting substrate 91 far away from the optical machine 20, and the driving device 50 is mounted on the upper portion of the first bracket 80. The heat generated by the optical engine 20 is transferred to the heat conduction pipe 92 through the heat conduction substrate 91, and then transferred to the heat sink 93 through the heat conduction pipe 92 to be discharged. The first holder 80 has a recess groove corresponding to the heat pipe 92 formed in a lower portion thereof, and the first holder 80 is mounted on the heat conductive substrate 91 while avoiding the heat pipe 92, so that heat transfer of the heat pipe 92 is not affected, and the driving unit 50 is mounted on an upper portion of the first holder 80, and a U-shaped mounting groove is formed in an upper portion of the first holder 80, and the driving unit 50 is mounted in the mounting groove, so that the driving unit 50 can be fixed to the upper portion of the first holder 80 by means of screws. The first bracket 80 vertically offsets the driving device 50 from the heat conductive substrate 91, thereby preventing heat from being transmitted to the driving device 50.

Further, the lower end of the heat sink 93 extends downward beyond the bottom side of the optical engine 20, the bottom side of the optical engine 20 is provided with a fan, and an air outlet of the fan faces the heat sink 93, so that air flow generated by the fan passes through the heat sink 93 to rapidly take away heat on the heat sink 93. Alternatively, the lower end of the heat sink 93 and the lower end of the fan are aligned so that the air flow generated by the fan entirely passes through the heat sink 93 to improve heat dissipation efficiency.

In one embodiment, the driving device 50 includes a driving motor 510 and a gear 520 disposed at an output end of the driving motor 510; the outer wall of the focusing wheel is provided with matching teeth 430 meshed with the gear 520. The driving motor 510 is mounted to the first bracket 80. The driving motor 510 and the gear 520 are fixed between the first and second speakers 61 and 62 by the first bracket 80, thereby ensuring stability and reliability. The driving motor 510 drives the gear 520 to rotate, and drives the matching teeth 430 meshed with the gear 520 to rotate synchronously, thereby driving the lens 31 connected with the focusing ring 40 to rotate.

Further, the inner wall of the focusing ring 40 is provided with a guide groove 410 extending along the axial direction of the lens 31, the outer wall of the lens 31 is provided with a limiting post 310, the focusing ring 40 is sleeved on the outer side of the lens 31, the limiting post 310 is arranged in the guide groove 410, and the gear 520 drives the focusing wheel to rotate, so that the limiting post 310 can move along the guide groove 410. Further, referring to fig. 1, the projection apparatus in this embodiment further includes a fixing ring 32, where the fixing ring 32 is fixed in the mounting hole 201, and the fixing ring 32 is screwed with the lens 31. The lens 31 and the focusing ring 40 are movably connected with the limiting column 310 through the guide groove 410, the focusing ring 40 drives the lens 31 to rotate around the axis direction of the focusing ring 40 when rotating, and because the guide groove 410 extends along the axis direction, and the lens 31 is in threaded fit with the fixing ring 32, in the rotating process of the lens 31, the threads on the fixing ring 32 push the lens 31 to move along the guide groove 410, and further the lens 31 moves back and forth along the axis direction of the focusing ring 40. Through the threaded fit between the lens 31 and the fixing ring 32, on one hand, the lens 31 is installed in the installation hole 201 of the optical engine 20, and on the other hand, the lens 31 can be extended and retracted in the installation hole 201 during the rotation process.

Optionally, referring to fig. 5, the inner wall of the focus ring 40 is provided with a plurality of guide grooves 410, and the plurality of guide grooves 410 are uniformly arranged around the circumferential direction of the focus ring 40 at intervals. Because of the difference of the lens 31, the initial focusing limit positions of the lens 31 of different manufacturers are different, when the lens 31 is at one focusing limit position, the position of the limit column 310 may be different, and the setting position of the inductive switch 72 is relatively fixed, through uniformly distributing a circle of guide groove 410 on the inner wall of the focusing ring 40, when the limit column 310 of the lens 31 is set at different positions of the outer wall, the focusing ring 40 can be assembled with the lens 31 at a position with smaller relative tolerance, thereby ensuring the rechecking requirement of the focusing range of the lens 31, being compatible with the lens 31 of different manufacturers, and realizing the product quantization production.

Alternatively, in other embodiments, the fixing ring 32 may not be provided, and the lens 31 may be directly screwed to the inner wall of the mounting hole 201, and the lens 31 is pushed to move back and forth by the screw thread in the mounting hole 201.

Alternatively, in other embodiments, the lens 31 and the focus ring 40 may be fixedly connected, the lens 31 is screwed with the mounting hole 201 or the fixing ring 32, and when the driving device 50 drives the focus ring 40 to rotate, the lens 31 and the focus ring 40 rotate synchronously and move back and forth together.

In one embodiment, the projection apparatus further includes a second bracket 71 and an inductive switch 72 installed on the second bracket 71, wherein the second bracket 71 is fixed on the optical engine 20 and located above the lens 31. The second bracket 71 does not interfere with the first bracket 80. The inductive switch 72 is located at the periphery of the focusing wheel, and a blocking piece 420 extending along the circumferential direction of the focusing ring 40 is arranged on the outer wall of the focusing ring. The blocking piece 420 has a first end 421 and a second end 422 capable of triggering the inductive switch 72, the blocking piece 420 can correspond to the inductive switch 72 when the focusing ring 40 rotates, and the inductive switch 72 is electrically connected to the driving device 50.

The sensing switch 72 can sense whether the shutter is in its signal position, and can be used to determine whether the focus ring 40 has moved to the limit position. Referring to fig. 4, when the first end 421 of the barrier triggers the sensing switch 72, the sensing switch 72 changes its signal, the system controls the driving device 50 to rotate in reverse, when the focus ring 40 rotates to a certain position according to the direction indicated by the arrow in fig. 4, the second end 422 of the barrier moves to the position of the sensing switch 72, the sensing switch 72 gives a signal, and the system controls the driving device 50 to rotate in reverse again, so as to ensure that the lens 31 can move in a required stroke when the focus ring 40 drives the lens 31 to focus. Optionally, the inductive switch 72 is a light sensitive switch. In other embodiments, the inductive switch 72 may employ other devices, such as a hall switch, a proximity switch, and the like.

Optionally, referring to fig. 1 and 8, in one embodiment, the second bracket 71 includes a first mounting portion 710, a connecting portion 711, and a second mounting portion 712 connected in sequence in a "C" shape. The two inductive switches 72 are respectively mounted on the first mounting portion 710 and the second mounting portion 712, and the connecting portion 711 is connected to the top of the optical machine 20. The first mounting portion 710 and the second mounting portion 712 are respectively provided with a switch PCB electrically connected to the inductive switch 72, and the switch PCB is electrically connected to the driving device 50. The inductive switch 72 is activated to transmit a signal to the switch PCB to adjust the direction of rotation of the driving device 50. The rotating position of the focusing ring 40 is monitored through the two inductive switches 72, and the method is simple in logic and high in reliability. In other embodiments, only one inductive switch 72 may be provided, and the monitoring of the rotational position of the focus ring 40 may also be implemented, which is simple in structure and reduces the cost.

Referring to fig. 1, 6, 7 and 9, in an embodiment, a window 101 corresponding to the lens 31 is formed on the housing 10, a first position-limiting portion 132 is disposed on an inner side of the housing 10, and the first position-limiting portion 132 is disposed around the window 101. One end of the light-emitting tube 210 facing the window 101 has a second limiting portion 212. One side of the focus ring 40 abuts against the first limiting portion 132, and the other side of the focus ring 40 abuts against the second limiting portion 212, so as to limit the focus ring 40 to move back and forth along the axial direction of the lens 31. The first limiting part 132 and the second limiting part 212 limit the focusing ring 40, so that the focusing ring 40 can only rotate coaxially with the lens 31 and cannot move back and forth along the axis direction, and the stability of the back and forth movement of the lens 31 and the reliability of focusing are ensured. Specifically, referring to fig. 1, the housing 10 includes a front shell 110 and a rear shell 120 detachably connected to each other, and the front shell 110 and the rear shell 120 are clamped by a snap structure to form an inner cavity for accommodating various components. The window 101 is opened on the front case 110.

Further, referring to fig. 6, 7 and 9, in an embodiment of the disclosure, the projection apparatus further includes a front cover trim 130, and the front cover trim 130 is provided with a light hole 103 corresponding to the window 101. The front cover trim 130 is mounted on the outer side of the housing 10, and the first stopper 132 is disposed on the inner side of the front cover trim 130 and passes through the window 101 to abut against the focus ring 40. The focus ring 40 abuts against the first position-limiting portion 132 of the front cover trim 130, and the light emitted from the lens 31 is projected to the projection screen through the window 101 and the light-transmitting hole 103. Through setting up protecgulum decoration 130, improved projection equipment's aesthetic property on the one hand, on the other hand is owing to locate the inboard of protecgulum decoration 130 with first spacing portion 132, the butt cooperation of the first spacing portion 132 of being convenient for and focusing ring 40.

Further, the first position-limiting portion 132 includes an annular protrusion, and an annular groove is disposed on one side of the focusing ring 40 facing the first position-limiting portion 132, and the annular protrusion is inserted into the annular groove. The focusing ring 40 is matched with the annular groove through the annular bulge, so that the focusing ring 40 rotates around the annular bulge, the stability of the focusing ring 40 is ensured, and the focusing reliability is improved.

Optionally, referring to fig. 3, fig. 5 and fig. 6, in an embodiment, in a side surface where the light emitting tube 210 of the optical machine 20 is located, a portion of the side surface located below the light emitting tube 210 is an inclined surface facing upward, that is, a portion of the front side surface of the optical machine 20 is an inclined surface. The light emitting tube 210, the first speaker 61, the second speaker 62 and the inclined surface are surrounded to form the accommodating space, and the driving device 50 is located in the accommodating space, so that the use of other parts in the housing 10 is not affected. The heat conductive substrate 91 is provided on the inclined surface.

Optionally, a focusing hole 126 corresponding to the focusing ring 40 is formed at the top of the rear housing 120. According to requirements, a dial wheel matched with the focusing ring 40 can be arranged in the focusing hole 126, so that manual focusing is realized. The automatic focusing and manual focusing modes of the projection equipment are not interfered, and the focusing requirements of different customers are met.

In one embodiment, a first sound outlet 122 corresponding to the first sound box 61 is formed on one side of the rear housing 120, and a second sound outlet 124 corresponding to the second sound box 62 is formed on the other side of the rear housing 120. Specifically, the first and second sounds 61 and 62 are respectively disposed at left and right sides of the lens 31, and the first and second sound emitting holes 122 and 124 are respectively disposed at left and right sides of the rear case 120. Further, the front housing 110 is further provided with heat dissipation holes corresponding to the heat dissipation assembly 90, for discharging the heat generated by the optical engine 20 out of the housing 10 through the heat dissipation holes.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The utility model provides a projection equipment, its characterized in that includes the casing and sets up ray apparatus, lens subassembly, first stereo set and the second stereo set in the casing, the lens subassembly includes camera lens, focusing ring and drive arrangement, the light-emitting side of ray apparatus is opened and is equipped with the mounting hole, the one end of camera lens install in the mounting hole, focusing ring cover is located the camera lens, first stereo set and second stereo set are located respectively the relative both sides of camera lens, drive arrangement detachably set up in one side of camera lens and be located between first stereo set and the second stereo set, drive arrangement with the focusing ring is connected, is used for the drive focusing ring and camera lens rotate, in order to drive the camera lens is along its axis direction back-and-forth movement.

2. The projection apparatus according to claim 1, wherein lower portions of the first and second speakers extend downward beyond a lower side of the lens to form an accommodation space, and the driving device is located below the lens and in the accommodation space.

3. The projection apparatus of claim 2, wherein a light-emitting barrel protruding forward is disposed on a light-emitting side of the optical engine, and the mounting hole is opened in the light-emitting barrel; first stereo set and second stereo set orientation the partly shaping in side of a light-emitting section of thick bamboo has the arcwall face, first stereo set and second stereo set pass through respectively the arcwall face embraces the both sides of locating a light-emitting section of thick bamboo, lie in on first stereo set and the second stereo set the part of arcwall face below with the downside of a light-emitting section of thick bamboo encloses establishes the formation accommodation space.

4. The projection apparatus according to claim 3, further comprising a first bracket and a heat dissipation assembly, wherein the heat dissipation assembly is fixed to the optical engine and located below the light-emitting tube, the first bracket is mounted to the heat dissipation assembly, and the driving device is mounted to the first bracket and located between the light-emitting tube and the heat dissipation assembly.

5. The projection apparatus according to claim 4, wherein the heat dissipation assembly includes a heat conducting substrate, a heat conducting pipe, and a heat sink, a side of the heat conducting substrate is attached to the optical engine, one end of the heat conducting pipe is connected to a side of the heat conducting substrate away from the optical engine, the other end of the heat conducting pipe is connected to the heat sink, the lower portion of the first bracket is mounted on the side of the heat conducting substrate away from the optical engine, and the driving device is mounted on the upper portion of the first bracket.

6. The projection device according to any of claims 3-5, wherein the driving means comprises a driving motor and a gear wheel provided at an output end of the driving motor, and an outer wall of the focusing wheel is provided with a mating tooth engaged with the gear wheel; the inner wall of focusing ring is equipped with the edge the axis direction of camera lens extends the guide way that sets up, the outer wall of camera lens is equipped with spacing post, the focusing ring cover is located the camera lens outside just spacing post is located in the guide way, the gear drives when the focusing wheel rotates, spacing post can be followed the guide way removes.

7. The projection device of claim 6, wherein the lens is threaded to an inner wall of the mounting hole; or, the lens assembly further comprises a fixing ring, the fixing ring is fixed in the mounting hole, and the fixing ring is in threaded connection with the lens.

8. The projection apparatus according to claim 6, wherein the projection apparatus further includes a second bracket and an inductive switch installed on the second bracket, the second bracket is fixed to the optical engine and located above the lens, the inductive switch is located at an outer periphery of the focusing wheel, a blocking piece extending in a circumferential direction of the focusing ring is disposed on an outer wall of the focusing ring, the blocking piece has a first end and a second end capable of triggering the inductive switch, the blocking piece can correspond to the inductive switch when the focusing ring rotates, and the inductive switch is electrically connected to the driving device.

9. The projection apparatus according to claim 6, wherein a window corresponding to the lens is formed in the housing, a first position-limiting portion is formed on an inner side of the housing, the first position-limiting portion is disposed around the window, a second position-limiting portion is formed at an end of the light-emitting tube facing the window, one side of the focus ring abuts against the first position-limiting portion, and the other side of the focus ring abuts against the second position-limiting portion, so as to limit the focus ring from moving back and forth along an axial direction of the lens.

10. The projection device of claim 9, further comprising a front cover trim, wherein the front cover trim is provided with a light hole corresponding to the window, the front cover trim is mounted on the outer side of the housing, and the first limiting portion is disposed on the inner side of the front cover trim and passes through the window to abut against the focus ring;

and/or, the first limiting part comprises an annular bulge, one side of the focusing ring, which faces the first limiting part, is provided with an annular groove, and the annular bulge is inserted into the annular groove.

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