Projector vertical closed ray machine based on internal wind path circulating system

Abstract

The invention relates to the technical field of light machines, and discloses a projector vertical closed light machine based on an internal wind path circulation system, which comprises a host, a light transmitting mirror arranged on the inner wall of the host, a shell arranged at the bottom of the inner wall of the host, a partition plate arranged at the top of the inner wall of the shell, and a polarization mechanism arranged at the top of the shell, the positioning mechanism is arranged at the bottom of the shell; the lifting mechanism is arranged at the top of the positioning mechanism; the polarization mechanism comprises a first rotary knob arranged on the top of the main machine, two protruding blocks symmetrically arranged at the bottom of the first rotary knob, a guide sleeve arranged on the top of the inner wall of the main machine and two limiting grooves symmetrically formed in the two sides of the guide sleeve. By arranging the polarizing mechanism and destroying the speckle forming condition, speckles on a projection image are weakened, the reflection distance of a part of light after beam splitting can be adjusted to optimize the interference effect of the light, the beam splitting reflection distance commonly used by a user can be set, and repeated adjustment during use each time is avoided.

Description

Technical Field

[0001] The present invention relates to the field of optical machine technology, and in particular to a vertical closed optical machine for a projector based on an internal air circulation system. Background Art

[0002] The vertical closed optical machine of the projector is an advanced projection technology that integrates dust prevention, efficient heat dissipation and stable imaging. Its core function is to effectively isolate external dust and keep the optical components clean through a closed design, thereby reducing the maintenance frequency and cost. This optical machine is suitable for diversified scenes such as home theaters, business meetings, education and training, bringing users clear and bright projection effects. The design of the vertical structure not only optimizes internal heat dissipation and extends the service life of the projector, but also reduces energy consumption, which is in line with the environmental protection concept of energy conservation and emission reduction. The significance of the vertical closed optical machine of the projector is that it improves the performance and reliability of the projection equipment, meets the pursuit of high-quality visual experience by modern users, and provides strong support for the innovative development of projection technology.

[0003] Traditional vertical projector sealed optical machines are widely used in the engineering field, but due to the limitations of their structure and working principle, there are often some problems that cannot be ignored. For example, the traditional vertical projector sealed optical machine uses laser as the light source during use, and the phase relationship of the light wave in space remains consistent, which will lead to a strong speckle effect. In this case, there will be an obvious phase relationship between the light waves at different points on the projection surface, so the interference effect is more obvious, and the speckle pattern is more obvious and fixed, affecting the imaging quality of the projector. In addition, when reducing speckle, the traditional vertical projector sealed optical machine has high requirements for the screen. It is usually required that the surface of the screen has a very suitable roughness to reduce the coherence of the light wave and reduce the formation of speckle, or make the surface of the screen vibrate slightly to change the path of the light wave and dynamically destroy the fixed speckle pattern. However, long-term vibration will accelerate the wear of the screen and the vibration device, shorten the service life of the equipment, and increase maintenance costs and workload. Summary of the invention

[0004] In view of the problem that the existing technology lacks the function of reducing speckle by destroying the spatial coherence of light waves, and the problem that the vibrating screen will increase equipment loss and increase the difficulty of maintenance, a vertical closed optical machine for a projector based on an internal air circulation system is proposed.

[0005] The purpose is to reduce speckle by splitting the light to weaken its coherence, avoid vibrating the screen, and reduce equipment loss and maintenance costs.

[0006] The technical solution of the present invention is a vertical closed optical machine of a projector based on an internal air circulation system, comprising a mainframe, a light-transmitting mirror arranged on the inner wall of the mainframe, a shell arranged on the bottom of the inner wall of the mainframe, a partition arranged on the top of the inner wall of the shell, a polarizing mechanism arranged on the top of the shell, a positioning mechanism arranged on the bottom of the shell, and a lifting mechanism arranged on the top of the positioning mechanism;

[0007] The polarizing mechanism includes a knob 1 arranged on the top of the main unit, two protrusions symmetrically arranged at the bottom of the knob 1, a guide sleeve arranged at the top of the inner wall of the main unit, two limiting grooves symmetrically opened on both sides of the guide sleeve, the inner walls of the limiting grooves are slidably connected to the outer walls of the protrusions, a retaining frame arranged at the bottom of the guide sleeve, a pressure rod arranged at the bottom of the knob 1, an upper spring sleeved on the top of the pressure rod, the top and bottom ends of the upper spring are respectively abutted against the bottom of the knob 1 and the top of the bottom frame, a bearing arranged at the bottom of the pressure rod, the inner wall of the bearing inner ring is slidably connected to the bottom of the pressure rod, a shaft sleeve arranged at the bottom of the bearing, two guide grooves symmetrically opened on both sides of the shaft sleeve, the bottom of the bearing inner ring is fixedly connected to the top of the shaft sleeve, and a mirror arranged at the bottom of the shaft sleeve. Segment one, lens two arranged at the bottom of lens one, a blind hole opened at the top of lens two, a spline arranged at the bottom end of a pressure rod, two round rods symmetrically arranged at the top of the splines, the outer wall of the round rod is slidably connected to the inner wall of the guide groove, the bottom of the spline is slidably connected to the inner wall of the blind hole, a deflection spring arranged at the bottom of the spline, the top and bottom ends of the deflection spring are respectively abutted against the bottom end of the spline and the bottom of the blind hole, a semi-transparent and semi-reflective mirror arranged at the bottom of the inner wall partition of the shell, a reflective mirror arranged on the inner wall of the shell away from the semi-transparent and semi-reflective mirror, and a refracting mirror arranged on the side of the top of the shell away from the pressure rod, a driven wheel arranged at the bottom of the shaft sleeve, a driving wheel arranged on the side of the driven wheel away from the refracting mirror, and a motor arranged at the top of the driving wheel;

[0008] The positioning mechanism includes a support plate arranged at the bottom of the shell, a through hole opened at the bottom of the support plate, a cylinder arranged on the inner wall of the through hole, a driving groove opened on the outer wall of the cylinder, a special-shaped hole opened inside the cylinder, a moving block arranged on the outer wall of the cylinder, two baffles symmetrically arranged on both sides of the moving block, a sliding hole opened at the top of the moving block, a stopper arranged inside the sliding hole, and two reset springs symmetrically arranged on both sides of the stopper, the top and bottom of the reset spring are respectively fixedly connected to the top of the sliding hole and the bottom of the stopper, A short shaft is arranged at the bottom of the block, the outer wall of the short shaft is slidably connected with the inside of the driving groove, a horizontal shaft is arranged inside the special-shaped hole, a baffle is arranged at the end of the horizontal shaft away from the moving block, a transverse spring is sleeved on the end of the horizontal shaft close to the baffle, two linear arrays are arranged at the top of the horizontal shaft, a support shaft 1 is arranged at the top of the support shaft 1, a connecting rod is arranged at the top of the connecting rod, a support shaft 2 is arranged at the top of the connecting rod, a push rod is arranged at the top of the support shaft 2, a knob 2 is arranged on the outer wall of the end of the horizontal shaft away from the baffle, and a block is arranged at the end of the horizontal shaft close to the knob 2.

[0009] Furthermore, the lifting mechanism includes a circular hole opened at the top of the support plate, a screw rod arranged inside the circular hole, two sliders symmetrically arranged at both ends of the screw rod, a pull rod arranged at the top of the slider, a support block arranged at the top of the pull rod, a lifting lens arranged at the top of the support block, two baffle plates 2 symmetrically arranged on both sides of the slider, a bottom block arranged at the bottom of the slider close to the side of the baffle, and a knob 3 arranged at the end of the screw rod away from the bottom block, and both ends of baffle plate 1 and baffle plate 2 are fixedly connected to the inner wall of the outer shell.

[0010] Furthermore, a plurality of fan-shaped Fresnel lenses 1 are arranged at the bottom of the lens 1, the angle of the bottom of the Fresnel lens 1 is α, and the lens 2 is composed of a plurality of fan-shaped Fresnel lenses 2, and the shape of the top of the Fresnel lens 2 matches the shape of the Fresnel lens 1.

[0011] Furthermore, the outer diameter of the baffle matches the inner diameter of the special-shaped hole at one end close to the transverse spring, and the outer shape of the end of the transverse axis close to the transverse spring is a triangular prism.

[0012] Furthermore, the bottom of the pressure rod is a spherical surface, and the top of the spline is provided with a groove matching the spherical surface of the bottom of the pressure rod.

[0013] Furthermore, a T-shaped hole is provided at one end of the knob 2 close to the block, two annular grooves are provided at the top and bottom of the T-shaped hole, long grooves are symmetrically provided on both sides of the T-shaped hole, and hemispherical pins are symmetrically provided at the top and bottom of the block.

[0014] Furthermore, the outer diameter of one end of the cylinder close to the support plate matches the diameter of the through hole, and the inner diameter of one end of the special-shaped hole close to the support plate matches the diameter of the horizontal axis.

[0015] Furthermore, a screw hole is formed at the bottom of the sliding block, and the screw hole cooperates with the screw rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting up a polarizing mechanism, the beam splitting and combining functions of the projector's vertical closed optical machine are realized. The mechanism uses the characteristics of light propagation to split the light emitted by the optical machine and recombine it after passing through different paths. In this process, each split light has a phase difference due to the difference in paths. The increase in this phase difference destroys the conditions for speckle formation, so that the speckle on the projected image is weakened. Through this technology, not only the clarity and viewing experience of the projected image are improved, but also the compact structure and efficient light utilization rate of the projector are maintained, bringing users a better visual enjoyment.

[0018] 2. By setting up a lifting mechanism, the control of the light after splitting of the projector's vertical closed optical machine is realized. The mechanism can adjust the reflection distance of a part of the light after splitting, and change the propagation distance of the light by slightly adjusting the position of the reflector. This adjustment mechanism enables the phase difference of the light after beam combination to be controlled, thereby optimizing the interference effect of the light and reducing the speckle phenomenon. The introduction of the lifting mechanism not only enhances the flexibility and adaptability of the projector, enabling it to better adapt to different projection environments and needs, but also maintains the efficiency and stability of the closed optical machine.

[0019] 3. By setting the positioning mechanism, the user's commonly used beam splitting reflection distance can be set, avoiding the tedious steps of repeated adjustment each time it is used. Through simple settings, the positioning mechanism can fix the reflector in a specific position, ensuring that each time the projector is started, it can quickly return to the user's accustomed reflection distance, thereby maintaining a consistent projection effect. This innovative design improves work efficiency, especially for professional users who need to adjust settings frequently, saving valuable time, reducing errors that may be caused by repeated adjustments, and ensuring the stability and reliability of the projection image. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the host of the present invention;

[0022] Figure 3 It is a schematic diagram of the internal structure of the housing of the present invention;

[0023] Figure 4 It is a schematic diagram of the internal structure of the guide sleeve of the present invention;

[0024] Figure 5 It is a schematic diagram of the shaft sleeve structure of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the lens 1 and the lens 2 of the present invention;

[0026] Figure 7 For the present invention Figure 6 A magnified image of area A;

[0027] Figure 8 It is an enlarged view of the positioning mechanism of the present invention;

[0028] Fig. 9 It is a schematic diagram of the internal structure of the cylinder of the present invention;

[0029] Fig.10 Schematic diagram of the connection between the support shaft 1 and the connecting rod of the present invention

[0030] Fig.11 This is the second cross-sectional view of the knob of the present invention;

[0031] Fig.12 This is the exploded view of the lifting mechanism of the present invention;

[0032] Fig.13 This is the schematic diagram of the light beam splitting and combining path of the present invention.

[0033] In the figure:

[0034] 1. Main body; 2. Transparent lens; 3. Outer shell; 4. Partition board; 5. Polarization mechanism; 6. Positioning mechanism; 7. Lifting mechanism; 51. Knob one; 52. Protrusion; 53. Guide sleeve; 54. Limit groove; 55. Bracket; 56. Pressing rod; 57. Upper top spring; 58. Bearing; 59. Bush; 510. Guide groove; 511. Lens one; 512. Lens two; 513. Blind hole; 514. Spline; 515. Round rod; 516. Deflection spring; 517. Semi-transparent and semi-reflective mirror; 518. Reflecting mirror; 519. Refracting lens; 520. Driven wheel; 521. Driving wheel; 522. Motor; 61. Support plate; 62. Through hole; 63. Cylinder; 64. Driving groove; 65. Special-shaped hole; 66. Moving block; 67. Baffle one; 68. Sliding hole; 69. Stopper; 610. Return spring; 611. Short shaft; 612. Horizontal shaft; 613. Baffle plate; 614. Horizontal spring; 615. Support shaft one; 616. Connecting rod; 617. Support shaft two; 618. Jacking rod; 619. Knob two; 620. Clamping block; 71. Round hole; 72. Lead screw; 73. Slide block; 74. Pull rod; 75. Support block; 76. Lifting lens; 77. Baffle two; 78. Bottom block; 79. Knob three. Specific embodiments

[0035] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the specification.

[0036] Example 1, refer to Figure 1-Figure 13, which is the first embodiment of the present invention, provides a vertical closed optical machine of a projector based on an internal air circulation system, including a main unit 1, a light transmitting mirror 2 fixedly connected to the inner wall of the main unit 1, and also including a shell 3 fixedly connected to the bottom of the inner wall of the main unit 1, a partition 4 fixedly connected to the top of the inner wall of the shell 3, a polarizing mechanism 5 fixedly connected to the top of the shell 3, a positioning mechanism 6 fixedly connected to the bottom of the shell 3, and a lifting mechanism 7 fixedly connected to the top of the positioning mechanism 6; the polarizing mechanism 5 includes a knob 51 rotatably connected to the top of the main unit 1, and two protrusions 52 symmetrically fixedly connected to the bottom of the knob 51, A guide sleeve 53 fixedly connected to the top of the inner wall of the main body 1, two limiting grooves 54 symmetrically opened on both sides of the guide sleeve 53, the inner wall of the limiting groove 54 is slidably connected to the outer wall of the protrusion 52, a retaining frame 55 fixedly connected to the bottom of the guide sleeve 53, a pressure rod 56 fixedly connected to the bottom of the knob 51, an upper spring 57 sleeved on the top of the pressure rod 56, the top and bottom ends of the upper spring 57 are respectively abutted against the bottom of the knob 51 and the top of the bottom frame, a bearing 58 slidably connected to the bottom of the pressure rod 56, the inner wall of the inner ring of the bearing 58 is slidably connected to the bottom of the pressure rod 56, and a shaft sleeve 55 fixedly connected to the bottom of the bearing 58 9, two guide grooves 510 symmetrically opened on both sides of the shaft sleeve 59, the bottom of the inner ring of the bearing 58 is fixedly connected to the top of the shaft sleeve 59, the lens 1 511 is fixedly connected to the bottom of the shaft sleeve 59, the lens 2 512 is rotatably connected to the bottom of the lens 1 511, the blind hole 513 opened on the top of the lens 2 512, the spline 514 abutting the bottom end of the pressure rod 56, two round rods 515 symmetrically fixedly connected to the top of the spline 514, the outer wall of the round rod 515 is slidably connected to the inner wall of the guide groove 510, the bottom of the spline 514 is slidably connected to the inner wall of the blind hole 513, and abuts against the bottom of the spline 514 A deflection spring 516, the top and bottom ends of the deflection spring 516 respectively abut against the bottom end of the spline 514 and the bottom of the blind hole 513, a semi-transparent and semi-reflective mirror 517 fixedly connected to the bottom of the inner wall partition 4 of the shell 3, a reflective mirror 518 fixedly connected to the inner wall of the shell 3 away from the semi-transparent and semi-reflective mirror 518, and a refractor 519 fixedly connected to the top of the shell 3 away from the pressure rod 56, a driven wheel 520 fixedly connected to the bottom of the shaft sleeve 59, a driving wheel 521 meshingly connected to the driven wheel 520 away from the refractor 519, and a motor 522 fixedly connected to the top of the driving wheel 521;The positioning mechanism 6 includes a support plate 61 fixedly connected to the bottom of the housing 3, a through hole 62 provided at the bottom of the support plate 61, a cylinder 63 rotatably connected to the inner wall of the through hole 62, a driving groove 64 provided on the outer wall of the cylinder 63, a special-shaped hole 65 provided inside the cylinder 63, a moving block 66 slidably connected to the outer wall of the cylinder 63, two baffles 67 symmetrically slidably connected to both sides of the moving block 66, a sliding hole 68 provided at the top of the moving block 66, a stopper 69 slidably connected to the inside of the sliding hole 68, two return springs 610 symmetrically fixedly connected to both sides of the stopper 69, the top and bottom of the return spring 610 are respectively fixedly connected to the top of the sliding hole 68 and the bottom of the stopper 69, and a short fixedly connected to the bottom of the stopper 69 The shaft 611, the outer wall of the short shaft 611 is slidably connected with the inside of the driving groove 64, the horizontal shaft 612 is rotatably connected to the inside of the special-shaped hole 65, the baffle 613 is fixedly connected to the end of the horizontal shaft 612 away from the moving block 66, the transverse spring 614 is sleeved on the end of the horizontal shaft 612 close to the baffle 613, the two linear arrays are fixedly connected to the support shaft 1 615 at the top of the horizontal shaft 612, the connecting rod 616 is hinged at the top of the support shaft 1 615, the support shaft 2 617 is hinged at the top of the connecting rod 616, the top rod 618 is fixedly connected to the top of the support shaft 2 617, the knob 2 619 is fixedly connected to the outer wall of the end of the horizontal shaft 612 away from the baffle 613, and the clamping block 620 is clamped to the end of the horizontal shaft 612 close to the knob 2 619. ;

[0037] Specifically, the light beam generated by the optical machine passes through the light transmitting mirror 2 and is irradiated on the semi-transparent and semi-reflective mirror 517, wherein a part of the light passes through the semi-transparent and semi-reflective mirror 517 and is irradiated on the reflector 518, and then is reflected back to the semi-transparent and semi-reflective mirror 517 by the reflector 518, and then is reflected by the semi-transparent and semi-reflective mirror 517 in the direction of the lens 1 511, and another part of the light emitted by the light transmitting mirror 2 is reflected to the lifting lens 76 when encountering the semi-transparent and semi-reflective mirror 517, and is reflected by the lifting lens 76 to the semi-transparent and semi-reflective mirror 517, and then passes through the semi-transparent and semi-reflective mirror 517 and is emitted in the direction of the lens 1 511, the light emitted by the light transmitting mirror 2 is split, each passes through a different optical path, and then the two split light beams are combined, and the phase difference of the two combined light beams is increased, which changes The formation conditions of speckle are met, thereby reducing speckle. By setting up a polarizing mechanism 5, the splitting and combining functions of the vertical closed optical machine of the projector are realized. The mechanism uses the characteristics of light propagation to split the light emitted by the optical machine and re-combine it after passing through different paths. In this process, each split light has a phase difference due to the difference in paths. The increase in this phase difference destroys the conditions for the formation of speckle, so that the speckle on the projected image is weakened. Through this technology, not only the clarity and viewing experience of the projected image are improved, but also the compact structure and efficient light utilization rate of the projector are maintained, bringing users a better visual enjoyment. By turning the knob 2 619, the cylinder 63 can be driven to rotate. While the cylinder 63 rotates, the short axis is squeezed through the driving groove 64. 611, the short shaft 611 is squeezed to move, and at the same time drives the stopper 69 to move, and the stopper 69 drives the moving block 66 to move. By turning the knob 2 619 in different directions, the moving block 66 can be controlled to move in different directions. After the moving block 66 is adjusted to the required position, the two ends of the block 620 are pinched in the direction of approaching each other to deform the block 620. After the block 620 is deformed, it drives the hemispherical pin to move, releases the connection between the ring groove of the T-shaped hole of the pin knob 2 619 away from the side of the horizontal axis 612, and then moves the block 620 in the direction close to the horizontal axis 612 until the pin of the block 620 is engaged with the other ring groove of the T-shaped hole of the knob 2 619. When the block 620 moves, it drives the horizontal axis 612 to move. 612 pushes connecting rod 616 through supporting shaft 1 615, connecting rod 616 pushes supporting shaft 2 617, supporting shaft 2 617 drives top rod 618 to move rod, and top rod 618 is constrained by special-shaped hole 65, so after being pushed by supporting shaft 2 617, it moves upward, and top rod 618 moves upward to push short shaft 611 upward, and short shaft 611 drives stopper 69 to move upward, and after stopper 69 moves upward, it squeezes reset spring 610, and after the top end of stopper 69 moves upward, it can limit the maximum moving stroke of bottom block 78, and through positioning mechanism 6, it can set the splitting reflection distance commonly used by users, avoiding the tedious steps of repeated adjustment each time it is used, and through simple setting, positioning mechanism 6 can fix the reflector at a specific position to ensure that each time the projector is started,The projection distance can be quickly restored to the user's accustomed reflection distance to maintain a consistent projection effect. This innovative design improves work efficiency, especially for professional users who need to adjust settings frequently, saving valuable time, reducing errors caused by repeated adjustments, and ensuring the stability and reliability of the projection image.

[0038] Reference Figure 8 and Fig.12 The lifting mechanism 7 includes a circular hole 71 opened at the top of the support plate 61, a screw rod 72 rotatably connected to the inside of the circular hole 71, two sliders 73 symmetrically meshed and connected at both ends of the screw rod 72, a pull rod 74 hinged at the top of the slider 73, a support block 75 hinged at the top of the pull rod 74, a lifting lens 76 fixedly connected to the top of the support block 75, two baffles 77 symmetrically slidably connected to both sides of the slider 73, a bottom block 78 fixedly connected to the bottom of the slider 73 on the side close to the stop block 69, and a knob 3 79 fixedly connected to the end of the screw rod 72 away from the bottom block 78, and both ends of the baffle 1 67 and the baffle 2 77 are fixedly connected to the inner wall of the shell 3.

[0039] Specifically, by turning knob three 79, the screw rod 72 can be driven to rotate, and the screw rod 72 drives the slider 73 to move while the slider 73 moves. The pull rod 74 moves while the pull rod 74 pushes the lens to move through the support block 75. When the two sliders 73 approach each other, the lifting lens 76 will be pushed down. When the two sliders 73 move away from each other, the lifting lens 76 will be driven to rise, and the bottom block 78 will move together with the slider 73 connected to it.

[0040] Reference Figure 6-Figure 7 The bottom of lens one 511 is provided with a plurality of fan-shaped Fresnel lenses one, the angle of the bottom of Fresnel lens one is α, and lens two 512 is composed of a plurality of fan-shaped Fresnel lenses two, and the shape of the top of Fresnel lens two matches the shape of Fresnel lens one.

[0041] Specifically, light will be refracted by the uneven mirror surface when passing through the lens 1 511 and the lens 2 512. When the Fresnel lens 1 of the lens 1 511 and the Fresnel lens 2 of the lens 2 512 cooperate with each other, the refraction of the light will be offset.

[0042] Example 2, reference Fig. 9 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the outer diameter of the baffle 613 matches the inner diameter of the special-shaped hole 65 near the transverse spring 614, and the end of the transverse axis 612 near the transverse spring 614 is in the shape of a triangular prism.

[0043] Specifically, the horizontal axis 612 cooperates with the through hole 62 through the shape of a triangular prism, and therefore will not rotate together with the cylinder 63 , and the baffle 613 can slide inside the special-shaped hole 65 .

[0044] Reference Figure 4 and Figure 5 The bottom of the pressure rod 56 is a spherical surface, and the top of the spline 514 is provided with a groove matching the spherical surface of the bottom of the pressure rod 56.

[0045] Specifically, the spherical surface of the pressure rod 56 cooperates with the groove of the spline 514 , and the spline 514 can rotate while being pressed by the pressure rod 56 .

[0046] Reference Fig.11 A T-shaped hole is formed at one end of the knob 619 near the block 620 , two annular grooves are formed at the top and bottom of the T-shaped hole, long grooves are formed symmetrically on both sides of the T-shaped hole, and hemispherical pins are symmetrically provided at the top and bottom of the block 620 .

[0047] Specifically, the T-shaped hole can accommodate the block 620 to rotate inside, and the hemispherical pin of the block 620 can rotate along the annular groove.

[0048] Reference Fig. 9 The outer diameter of one end of the cylinder 63 close to the support plate 61 matches the diameter of the through hole 62 , and the inner diameter of one end of the special-shaped hole 65 close to the support plate 61 matches the diameter of the horizontal axis 612 .

[0049] Specifically, one end of the cylinder 63 close to the support plate 61 can rotate inside the through hole 62, and the inner diameter of one end of the cylinder 63 close to the support plate 61 can accommodate the movement of the cross bar inside.

[0050] Reference Fig.12 A screw hole is formed at the bottom of the slider 73 , and the screw hole cooperates with the screw rod 72 .

[0051] Specifically, the screw rod 72 can drive the two sliders 73 to move while rotating, and the two sliders 73 can only move in opposite directions.

[0052] In summary, the working principle of the present invention is as follows: after the optical machine is turned on, the light beam is emitted from the light transmitting mirror 2 to the semi-transparent and semi-reflective mirror 517, and then the light beam is divided into two beams, one beam passes through the semi-transparent and semi-reflective mirror 517 and then is emitted to the reflector 518, is reflected by the reflector 518 to the semi-transparent and semi-reflective mirror 517, and then is reflected by the semi-transparent and semi-reflective mirror 517 to the lens 1 511 and the lens 2 512, and finally is emitted to the refracting mirror 519, and the other beam of light is reflected by the semi-transparent and semi-reflective mirror 517 to the lifting lens 76, is reflected by the lifting lens 76 and passes through the semi-transparent and semi-reflective mirror 517 to the lens 1 511 and the lens 2 512, and then is emitted to the refracting mirror 519. Since the routes overlap, the two beams of light will be merged in the process of being emitted to the lens 2 512, but since the two beams of light The distances of reflection are different, so the phase difference between the two beams of light increases, weakening the spatial coherence of the light beam, changing the conditions for generating speckle, and thus reducing speckle. When the optical machine is started, the motor 522 is rotated, the motor 522 drives the driving wheel 521 to rotate, the driving wheel 521 drives the driven wheel 520 to rotate, the driven wheel 520 drives the shaft sleeve 59 to rotate, the shaft sleeve 59 drives the lens 1 511 to rotate, the shaft sleeve 59 drives the spline 514 to rotate through the round rod 515, the spline 514 drives the lens 2 512 to rotate, when the lens 1 511 and the lens 2 512 are in a misaligned state, the uneven part of the lens 1 511 and the lens 2 512 will be refracted, and the flat part of the lens 1 511 will not be refracted. The lens 2 512 rotates, so the light will switch quickly between the refraction state and the non-refraction state, which is reflected on the screen in that the landing point of the light is constantly switching quickly, thereby reducing the generation of speckles and avoiding the disadvantage of vibrating the screen. When there is no need to change the landing point of the light, the knob 1 51 is pressed down and rotated, so that the knob 1 51 drives the protrusion 52 to move along the limit groove 54. When the knob 1 51 moves downward, the upper spring 57 is compressed and the pressure rod 56 is driven to move downward together. The pressure rod 56 moves downward to squeeze the spline 514 to move it downward and compress the deflection spring 516. When the spline 514 moves downward, it drives the round rod 515 to move. The round rod 515 is squeezed by the guide groove 510 to rotate, and drives the lens 2 512 to rotate while rotating. After 512 is rotated, the top and the uneven surface of the bottom of lens one 511 cooperate with each other. At this time, when the light passes through lens one 511 and lens two 512, the refraction angles of lens one 511 and lens two 512 cancel each other out, so the landing point of the light will not be changed. The height of the lifting lens 76 can be adjusted by turning knob three 79, thereby changing the stroke of the light beam reflected by the lifting lens 76, so as to adjust to the optimal reflection distance. The stopper 69 is raised by pushing the card block 620, and then the position of the moving block 66 and the stopper 69 is adjusted by turning knob two 619, so that the stopper 69 contacts the bottom block 78. When the stopper 69 is in the raised state, the stopper 69 moves with the connected slider 73 until it contacts the stopper 69, and then it is blocked and can no longer move.When the stopper 69 is in the retracted state, it will not block the bottom block 78. Therefore, by moving the stopper 69 to a commonly used position of the slider 73, this position can be recorded, so that the slider 73 can be quickly moved to the recorded position when used next time, avoiding the need for repeated debugging each time.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A vertical closed optical machine for a projector based on an internal air circulation system, comprising a main unit (1), and a light-transmitting mirror (2) arranged on the inner wall of the main unit (1), characterized in that: It also includes a shell (3) arranged at the bottom of the inner wall of the main body (1), a partition (4) arranged at the top of the inner wall of the shell (3), a polarizing mechanism (5) arranged at the top of the shell (3), a positioning mechanism (6) arranged at the bottom of the shell (3), and a lifting mechanism (7) arranged at the top of the positioning mechanism (6); The polarizing mechanism (5) comprises a knob (51) arranged at the top of the main unit (1), two protrusions (52) symmetrically arranged at the bottom of the knob (51), a guide sleeve (53) arranged at the top of the inner wall of the main unit (1), two limiting grooves (54) symmetrically opened on both sides of the guide sleeve (53), the inner wall of the limiting groove (54) being slidably connected to the outer wall of the protrusion (52), a stopper (55) arranged at the bottom of the guide sleeve (53), a pressure rod (56) arranged at the bottom of the knob (51), an upper spring (57) sleeved on the top of the pressure rod (56), and an upper The top and bottom ends of the top spring (57) are respectively in contact with the bottom of the knob (51) and the top of the bottom frame, a bearing (58) is arranged at the bottom of the pressure rod (56), the inner wall of the inner ring of the bearing (58) is slidably connected to the bottom of the pressure rod (56), a sleeve (59) is arranged at the bottom of the bearing (58), two guide grooves (510) are symmetrically opened on both sides of the sleeve (59), the bottom of the inner ring of the bearing (58) is fixedly connected to the top of the sleeve (59), a lens (511) is arranged at the bottom of the sleeve (59), and a lens (511) is arranged at the bottom of the lens (511). The invention relates to a lens 2 (512), a blind hole (513) provided at the top of the lens 2 (512), a spline (514) provided at the bottom end of the pressure rod (56), two round rods (515) symmetrically provided at the top of the spline (514), the outer wall of the round rod (515) being slidably connected to the inner wall of the guide groove (510), the bottom of the spline (514) being slidably connected to the inner wall of the blind hole (513), and a deflection spring (516) provided at the bottom of the spline (514), the top and bottom ends of the deflection spring (516) being respectively connected to the bottom end of the spline (514) and the blind hole. (513), a semi-transparent and semi-reflective mirror (517) arranged at the bottom of the inner wall partition (4) of the shell (3), a reflective mirror (518) arranged at the inner wall of the shell (3) away from the semi-transparent and semi-reflective mirror (517), a refracting mirror (519) arranged at the top of the shell (3) away from the pressure rod (56), a driven wheel (520) arranged at the bottom of the shaft sleeve (59), a driving wheel (521) arranged at the side of the driven wheel (520) away from the refracting mirror (519), and a motor (522) arranged at the top of the driving wheel (521); The positioning mechanism (6) comprises a support plate (61) arranged at the bottom of the housing (3), a through hole (62) provided at the bottom of the support plate (61), a cylinder (63) provided on the inner wall of the through hole (62), a driving groove (64) provided on the outer wall of the cylinder (63), a special-shaped hole (65) provided inside the cylinder (63), a moving block (66) provided on the outer wall of the cylinder (63), two baffles (67) symmetrically provided on both sides of the moving block (66), a sliding hole (68) provided on the top of the moving block (66), a stopper (69) provided inside the sliding hole (68), two return springs (610) symmetrically provided on both sides of the stopper (69), the top and bottom of the return spring (610) being fixedly connected to the top of the sliding hole (68) and the bottom of the stopper (69) respectively, and a short shaft (67) provided at the bottom of the stopper (69) 611), the outer wall of the short shaft (611) is slidably connected with the inside of the driving groove (64), a transverse shaft (612) is arranged inside the special-shaped hole (65), a baffle (613) is arranged at the end of the transverse shaft (612) away from the moving block (66), a transverse spring (614) is sleeved on the end of the transverse shaft (612) close to the baffle (613), two linear arrays are arranged at the top of the transverse shaft (612) A support shaft (615), a connecting rod (616) is arranged at the top of the support shaft (615), a support shaft (617) is arranged at the top of the connecting rod (616), a top rod (618) is arranged at the top of the support shaft (617), a knob (619) is arranged on the outer wall of the end of the transverse shaft (612) away from the baffle (613), and a block (620) is arranged at the end of the transverse shaft (612) close to the knob (619).

2. The vertical closed optical machine for projectors based on the internal air circulation system according to claim 1, characterized in that: The lifting mechanism (7) comprises a circular hole (71) opened at the top of the support plate (61), a screw rod (72) arranged inside the circular hole (71), two sliders (73) symmetrically arranged at both ends of the screw rod (72), a pull rod (74) arranged at the top of the slider (73), a support block (75) arranged at the top of the pull rod (74), a lifting lens (76) arranged at the top of the support block (75), two baffle plates (77) symmetrically arranged at both sides of the slider (73), a bottom block (78) arranged at the bottom of the slider (73) on the side close to the stop block (69), and a knob (79) arranged at the end of the screw rod (72) away from the bottom block (78), and both ends of the baffle plate (67) and the baffle plate (77) are fixedly connected to the inner wall of the housing (3).

3. The vertical closed optical machine for projectors based on the internal air circulation system according to claim 1, characterized in that: The bottom of the lens one (511) is provided with a plurality of fan-shaped Fresnel lenses one, the angle of the bottom of the Fresnel lens one is α, and the lens two (512) is composed of a plurality of fan-shaped Fresnel lenses two, and the shape of the top of the Fresnel lens two matches the shape of the Fresnel lens one.

4. The vertical closed optical machine for projectors based on the internal air circulation system according to claim 1, characterized in that: The outer diameter of the baffle (613) matches the inner diameter of the end of the special-shaped hole (65) close to the transverse spring (614), and the outer shape of the end of the transverse axis (612) close to the transverse spring (614) is a triangular prism.

5. The vertical closed optical machine for projectors based on the internal air circulation system according to claim 1, characterized in that: The bottom of the pressure rod (56) is a spherical surface, and the top of the spline (514) is provided with a groove matching the spherical surface of the bottom of the pressure rod (56).

6. The vertical closed optical machine for projector based on internal air circulation system according to claim 1, characterized in that: The second knob (619) has a T-shaped hole at one end close to the clamping block (620), and two annular grooves are formed at the top and bottom of the T-shaped hole. The top and bottom of the clamping block (620) are symmetrically provided with hemispherical pins.

7. The vertical closed optical machine for projectors based on the internal air circulation system according to claim 1, characterized in that: The outer diameter of one end of the cylinder (63) close to the support plate (61) matches the diameter of the through hole (62), and the inner diameter of one end of the special-shaped hole (65) close to the support plate (61) matches the diameter of the horizontal axis (612).

8. The vertical closed optical machine for projectors based on the internal air circulation system according to claim 2, characterized in that: The bottom of the slider (73) is provided with a screw hole, and the screw hole and the screw rod (72) cooperate with each other.

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