Projector and automatic zooming method thereof

Abstract

The invention relates to the technical field of projector equipment, in particular to a projector and an automatic zooming method thereof.The projector comprises a shell, a controller, a light source and a hydraulic driving assembly are connected in the shell, the light source is connected with the end of a lens, the other end of the lens penetrates out of the shell, and the lens is connected with the hydraulic driving assembly; the shell is provided with the image sensor, the image sensor, the light source and the hydraulic driving assembly are all electrically connected with the controller, the focal length of the lens is adjusted by arranging the hydraulic driving assembly, the situation that mechanical parts are used for executing zooming operation is avoided, and then abrasion of the mechanical parts after long-time use is avoided; it is ensured that the device can accurately implement the whole process when executing zooming operation every time.

Description

Technical Field

[0001] The present invention relates to the technical field of projector equipment, and in particular to a projector and an automatic zoom method thereof. Background Art

[0002] A projector is a device that projects images or videos onto a projection screen or other surface, usually to enlarge the displayed image so that it can be viewed on a larger screen. Projectors are widely used in education, business presentations, home theaters, and large conferences. The basic working principle of a projector is to generate strong light through a light source (such as a bulb or laser), and then project the image or video signal onto the screen through a series of optical components (such as lenses, reflectors, etc.).

[0003] However, the prior art still has some shortcomings. For example, patent number: CN201590001313.7 is a projection device, comprising: an image magnification unit, having a first optical system including a plurality of lenses, and enlarging or reducing the projected image by moving the first optical system along the optical axis direction of the light from the light source; an image plane correction unit, having a second optical system, and performing image plane correction of the projected image by moving the second optical system along the optical axis direction; a driving unit, having a connecting unit selectively connected to one of the image magnification unit and the image plane correction unit, driving the image magnification unit when the connecting unit is connected to the image magnification unit, thereby moving the first optical system along the optical axis direction, and driving the image plane correction unit when the connecting unit is connected to the image plane correction unit. The device needs to execute the action through a gear mechanism when zooming. After long-term operation, the gears will be worn and the zoom accuracy will be seriously reduced. Summary of the invention

[0004] The present invention provides a projector and an automatic zoom method thereof, which are used to solve the problem raised in the background technology.

[0005] In order to achieve the above-mentioned invention objectives, the present invention provides the following technical solutions: a projector, comprising: a shell, a controller, a light source and a hydraulic drive assembly are connected to the shell, an end of a lens is connected to the light source, the other end of the lens passes through the setting of the shell, the lens is connected to the hydraulic drive assembly, an image sensor is installed on the shell, and the image sensor, the light source and the hydraulic drive assembly are all electrically connected to the controller.

[0006] Preferably, the lens comprises: a mounting tube, the light source is threadedly connected to the inner wall of the end of the mounting tube, the other end of the mounting tube is connected to a sealing mechanism, and the side wall of the sealing mechanism is plug-fitted with the circular hole of the housing.

[0007] Preferably, the inner wall of the mounting tube has two annular grooves, each of which has a guide ring for sliding sealing, and the side wall of the guide tube is connected to the inner wall of the guide ring to seal the annular groove, and a lens assembly is installed in each of the two guide tubes.

[0008] Preferably, the side wall of the guide tube, the side wall of the guide ring and the inner wall of the annular groove form a pressure chamber, and the inner wall of the pressure chamber is connected to the output end of the hydraulic drive component.

[0009] Preferably, the other side wall of the guide ring is connected to the inner wall of the annular groove via a spring.

[0010] Preferably, the sealing mechanism includes: a mounting arc, a guide column and a connecting spring, the end faces of the two mounting arcs are in contact and fit together to form a plane mirror mounting tube, the side wall of the plane mirror mounting tube is plug-fitted into the circular hole, two guide columns are installed on the end face of one mounting arc, the guide columns are slidably connected to the guide holes on the end face of the other mounting arc, and the inner wall of the guide hole is connected to the guide column through a connecting spring.

[0011] Preferably, the side wall at the end of the plane mirror mounting tube is threadedly connected to the inner wall of the other end of the mounting tube, the other end of the plane mirror mounting tube is arranged away from the side wall of the outer shell, the inner wall of the plane mirror mounting tube is in contact and cooperate with the side wall of the plane mirror, and a retaining ring is provided in the plane mirror mounting tube, and the retaining ring cooperates with the retaining ring 2 on the inner wall of the other end of the mounting tube to clamp the plane mirror.

[0012] Preferably, the hydraulic drive assembly includes: an oil storage tank, an oil storage tank, a pump casing and a second pump casing are installed in the outer casing, the oil storage tank is filled with hydraulic oil, the oil storage tank is connected to the pump casing through a circulation pipe, the oil tank is connected to the second pump casing through the circulation pipe, the pump casing is connected to a pressure chamber through a pipeline, and the second pump casing is connected to another pressure chamber through pipeline two.

[0013] Preferably, a blade shaft is rotatably connected inside the pump casing, both ends of the blade shaft are arranged outside the pump casing, a spline hole is penetrated through the blade shaft, a blade shaft 2 is rotatably connected inside pump casing 2, both ends of the blade shaft 2 are arranged outside the pump casing 2, a spline hole 2 is penetrated through the blade shaft 2, a guide shaft is provided in the spline hole and the spline hole 2, the spline shaft on the guide shaft is plugged into the spline hole or the spline hole 2 or the spline hole and the spline hole 2, and the end of the guide shaft is connected to the driving mechanism.

[0014] Preferably, a projector automatic zoom method is applied to a projector as described in any one of the above items, comprising the following steps:

[0015] Comparing the real-time projector image data acquired by the image sensor with the theoretical projector image data based on the controller to obtain the zoom parameter;

[0016] Based on the zoom parameter, a spacing parameter of the two lens components in the lens is obtained;

[0017] Based on the spacing parameter, the controller is used to start the hydraulic drive assembly to adjust the distance between the two lens assemblies respectively;

[0018] After the distances between the two lens assemblies are adjusted respectively, the zoom of the projector is completed.

[0019] The beneficial effects of the present invention are as follows:

[0020] By setting up a hydraulic drive assembly to adjust the focal length of the lens, the use of mechanical parts to perform zoom operations is avoided, thereby avoiding wear and tear of mechanical parts after long-term use, ensuring that the device can accurately implement the entire process each time the zoom operation is performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0022] Figure 2 is a cross-sectional view of the present invention;

[0023] Figure 3 is a cross-sectional view of a lens of the present invention;

[0024] Figure 4 It is a schematic diagram of the connection relationship between the guide column and the connecting spring of the present invention;

[0025] Figure 5 It is a cross-sectional view of a liquid pump and a second liquid pump of the present invention;

[0026] Figure 6 It is a schematic diagram of the installation position of the spline shaft on the guide shaft of the present invention;

[0027] Figure 7 This is a schematic diagram of the installation position of the gear three of the present invention;

[0028] Figure 8 It is a schematic diagram of the connection relationship between the screw rod, the guide plate and the guide shaft of the present invention;

[0029] Fig. 9 It is a schematic diagram of the structure of the spiral cooling tube and the spiral cooling tube II of the present invention;

[0030] Fig.10 It is a schematic diagram of the connection relationship between the fan, the air inlet pipe and the filter air inlet box of the present invention;

[0031] Fig.11 It is a schematic diagram of the connection relationship between the pipeline and the transfer tube of the present invention;

[0032] Fig.12 It is a cross-sectional view of the locking tube and the locking tube 2 of the present invention.

[0033] Wherein: housing 1, image sensor controller light source 2, lens 3, hydraulic drive assembly 4, mounting tube 5, guide ring 6, guide tube 7, spring 8, sealing mechanism 9, mounting arc 10, guide column 11, connecting spring 12, oil storage tank 13, pump housing 14, pump housing II 15, guide shaft 16, pipeline 17, pipeline II 18, spline shaft 19, spline shaft II 20, rotating shaft III 21, gear 22, screw 23, gear II 24, slider 25, rotating shaft IV 26, gear III 27, guide rod 28, guide plate 30, spiral cooling tube 31, spiral cooling tube II 32, micro switch 33, micro switch II 34, fan 35, air inlet pipe 36, filter air inlet box 37, exhaust filter 38, locking tube 39, locking tube II 40, transfer tube 41, transfer tube II 42, locking column 43, locking hole 44, locking spring 45. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0035] Example 1: Reference Figure 1-Figure 12 A projector comprises: a shell 1, a controller, a light source 2 and a hydraulic drive assembly 4 are connected inside the shell 1, an end of a lens 3 is connected to the light source 2, the other end of the lens 3 passes through the setting of the shell 1, the lens 3 is connected to the hydraulic drive assembly 4, an image sensor is installed on the shell 1, and the image sensor, the light source 2 and the hydraulic drive assembly 4 are all electrically connected to the controller.

[0036] The principles and beneficial effects of the above scheme are:

[0037] The specific model of the image sensor is: OV7725. After the projector starts working, the image sensor obtains the projector image data of the image projected on the screen and transmits it to the controller. The controller compares the projector image data with the stored theoretical projector image data to obtain the zoom parameter of the projector, and then starts the hydraulic drive component 4 through the controller to adjust the focal length of the lens 3, thereby realizing the zoom of the image projected by the light source 2. By setting the hydraulic drive component 4 to adjust the focal length of the lens 3, the use of mechanical parts to perform zoom operations is avoided, thereby avoiding the wear of mechanical parts after long-term use, ensuring that the device can accurately implement the entire process each time the zoom operation is performed; at the same time, the focal length of the lens 3 is adjusted by hydraulic pressure to further improve the accuracy of the adjustment, reduce the complexity of the device, and greatly reduce the space occupied by the components in the device.

[0038] Example 2: Reference Figure 1-Figure 12The lens 3 includes: a mounting tube 5, the light source 2 is threadedly connected to the inner wall of the end of the mounting tube 5, and the other end of the mounting tube 5 is connected to a sealing mechanism 9, and the side wall of the sealing mechanism 9 is plug-fitted with the circular hole of the housing 1.

[0039] The principles and beneficial effects of the above scheme are:

[0040] The threaded connection between the light source 2 and the inner wall of the end of the mounting tube 5 can further improve the stability of the installation of the light source 2 in the housing 1, and at the same time facilitate the installation and disassembly between the light source 2 and the mounting tube 5, thereby reducing the difficulty of maintenance and repair of parts. The other end of the mounting tube 5 is connected to a sealing mechanism 9, which can ensure that the lens 3 can perform the projection work while also sealing the interior of the lens 3, thereby providing protection for the parts inside the lens 3.

[0041] Example 3: Reference Figure 1-Figure 12 The inner wall of the mounting tube 5 is provided with two annular grooves, each of which is slidably sealed with a guide ring 6. The side wall of the guide tube 7 is connected to the inner wall of the guide ring 6 to seal the annular groove. A lens assembly is installed in each of the two guide tubes 7.

[0042] The principles and beneficial effects of the above scheme are:

[0043] Based on the actual situation during the design of the device, different types and quantities of lens assemblies can be installed in the guide tube 7 to concentrate or diffuse the light source 2. The guide ring 6 and the annular groove are slidably matched, and the setting of the annular groove provides a moving space for adjusting the spacing between the lens assemblies; the guide tube 7 seals the annular groove and can also slidably match with the inner wall of the mounting tube 5. Therefore, the setting of the guide tube 7 improves the stability of the guide ring 6 during movement, prevents the lens assembly from axial deviation during zooming, and further ensures that the device has an excellent projection effect while zooming.

[0044] Example 4: Reference Figure 1-Figure 12 The side wall of the guide tube 7, the side wall of the guide ring 6 and the inner wall of the annular groove form a pressure chamber, and the inner wall of the pressure chamber is connected to the output end of the hydraulic drive component 4.

[0045] The principles and beneficial effects of the above scheme are:

[0046] The setting of the pressure chamber provides a space for accommodating the hydraulic oil output by the hydraulic drive assembly 4. After the hydraulic oil enters the pressure chamber, the guide ring 6 begins to displace under the action of the hydraulic pressure, thereby driving the guide tube 7 and the lens assembly to move so that the device can efficiently implement the zoom operation; at the same time, since the guide tube 7 can seal the annular groove, the hydraulic oil in the pressure chamber will not leak when the guide tube 7 moves, thereby improving the safety of the device during operation.

[0047] Example 5: Reference Figure 1-Figure 12 The other side wall of the guide ring 6 is connected to the inner wall of the annular groove through a spring 8.

[0048] The principles and beneficial effects of the above scheme are:

[0049] After the zooming is finished, the hydraulic oil in the pressure chamber is released. At this time, under the elastic force of the spring 8, the guide ring 6 drives the guide tube 7 and the lens assembly to reset and prepare for the next zooming operation.

[0050] Example 6: Reference Figure 1-Figure 12 The sealing mechanism 9 includes: a mounting arc 10, a guide column 11 and a connecting spring 12. The end faces of the two mounting arcs 10 are in contact and matched to form a plane mirror mounting tube. The side wall of the plane mirror mounting tube is plug-fitted with the round hole. Two guide columns 11 are installed on the end face of one mounting arc 10. The guide column 11 is slidably connected to the guide hole on the end face of the other mounting arc 10. The inner wall of the guide hole is connected to the guide column 11 through the connecting spring 12.

[0051] The principles and beneficial effects of the above scheme are:

[0052] The end faces of the two mounting arcs 10 contact each other to form a plane mirror mounting tube, one end of which is placed outside the housing 1. Since the guide column 11 on the end face of one mounting arc 10 is connected to the inner wall of the guide hole on the end face of the other mounting arc 10 through a connecting spring 12, and the guide column 11 is slidably connected to the guide hole, the two connected mounting arcs 10 can be used to directly clamp the unpacked plane mirror, thereby avoiding the operator from leaving fingerprints when installing the plane mirror directly by hand, thereby avoiding reducing the projection effect of the device; at the same time, it can also avoid the operator from wearing gloves to install the plane mirror, reducing the complexity of the plane mirror installation.

[0053] Example 7: Reference Figure 1-Figure 12 The side wall of the end of the plane mirror mounting tube is threadedly connected to the inner wall of the other end of the mounting tube 5. The other end of the plane mirror mounting tube is arranged away from the side wall of the shell 1. The inner wall of the plane mirror mounting tube contacts and cooperates with the side wall of the plane mirror. A retaining ring is provided in the plane mirror mounting tube. The retaining ring cooperates with the retaining ring 2 on the inner wall of the other end of the mounting tube 5 to clamp the plane mirror.

[0054] The principles and beneficial effects of the above scheme are:

[0055] After the plane mirror mounting tube has initially completed the clamping of the plane mirror, the side wall of the plane mirror mounting tube is threadedly connected to the inner wall of the other end of the mounting tube 5. After the plane mirror mounting tube is rotated into place, the plane mirror clamped by the retaining ring and the retaining ring 2 has its axis adjusted to be the same as the axis of the plane mirror mounting tube and the mounting tube 5, thereby further reducing the complexity of the plane mirror installation. Furthermore, since the plane mirror mounting tube is plug-fitted with the circular hole, after the sealing mechanism 9 is installed, the force points of the mounting tube 5 are increased, thereby reducing the force on the end of the light source 2 and improving the stability of the light source 2 during operation.

[0056] Example 8: Reference Figure 1-Figure 12 The hydraulic drive assembly 4 includes: an oil tank 13, an oil tank 13, a pump housing 14 and a second pump housing 15 are installed in the outer shell 1, the oil tank 13 is filled with hydraulic oil, the oil tank 13 is connected to the pump housing 14 through a circulation pipe, the oil tank 13 is connected to the second pump housing 15 through a circulation pipe, the pump housing 14 is connected to a pressure chamber through a pipeline 17, and the second pump housing 15 is connected to another pressure chamber through a pipeline 18.

[0057] The principles and beneficial effects of the above scheme are:

[0058] The hydraulic oil stored in the oil tank 13 can enter the pump housing 14 through a circulating pipe, and then the hydraulic oil in the pump housing 14 enters a pressure chamber through a pipe 17. The hydraulic oil stored in the oil tank 13 can also enter the pump housing 15 through a circulating pipe 2, and then the hydraulic oil in the pump housing 15 can also enter another pressure chamber through a pipe 2 18. Two liquid supply structures are set to supply hydraulic oil to the two pressure chambers respectively, which greatly improves the efficiency of the device in performing the zoom action.

[0059] Example 9: Reference Figure 1-Figure 12 The pump housing 14 is rotatably connected with a blade shaft, and both ends of the blade shaft are arranged outside the pump housing 14. A spline hole is penetrated on the blade shaft. The pump housing 15 is rotatably connected with a blade shaft 2, and both ends of the blade shaft 2 are arranged outside the pump housing 15. A spline hole 2 is penetrated on the blade shaft 2. A guide shaft 16 is arranged in the spline hole and the spline hole 2. The spline shaft 19 on the guide shaft 16 is plugged into the spline hole or the spline hole 2 or the spline hole and the spline hole 2, and the end of the guide shaft 16 is connected to the driving mechanism.

[0060] The principles and beneficial effects of the above scheme are:

[0061] When supplying hydraulic oil, the driving mechanism first selects to use the pump casing 14 and the pump casing 2 15 to supply hydraulic oil, and then selects the pump casing 14 or the pump casing 2 15 to supplement the supply of hydraulic oil. Such a configuration can greatly improve the precise control of the hydraulic oil output; when the pump casing 14 and the pump casing 2 15 work at the same time, the spline hole and the spline hole 2 are simultaneously plugged into and matched with the spline shaft 19 on the guide shaft 16, and then the driving mechanism is started to drive the guide shaft 16 to rotate, and the guide shaft 16 drives the blade shaft and the blade shaft 2 to rotate, and the first hydraulic oil supply is carried out. After the first hydraulic oil supply is completed, the driving mechanism adjusts the spline shaft 19 to be plugged into and matched with the spline hole or the spline hole 2, and the driving mechanism is started again to supplement the supply of hydraulic oil. The mechanism greatly reduces the complexity of the structure and can realize the precise supply of hydraulic oil to ensure the accurate execution of the zoom action.

[0062] Example 10: Reference Figure 1-Figure 12 The end of the guide shaft 16 is connected to a spline shaft 20 of a driving mechanism, and the spline shaft 20 is plugged into a spline hole 3 at the end of a rotating shaft 3 21. The rotating shaft 3 21 is rotatably connected to the inner wall of the shell 1, and a gear 22 is installed at the other end of the rotating shaft 3 21. A screw 23 is rotatably connected to the inner wall of the shell 1, and a gear 24 is installed at the end of the screw 23. The screw 23 is arranged parallel to the rotating shaft 3 21. A rotating shaft 4 26 is rotatably connected to a slider 25 that is slidably connected to the inner wall of the shell 1, and a gear 3 27 is installed at the end of the rotating shaft 4 26 to mesh with the gear 22 or the gear 2 24. The output end of an electromagnet is connected to each side of the slider 25. The electromagnet is installed in the shell and is electrically connected to the controller. A guide plate 30 is threadedly connected to the screw 23, and the guide plate 30 is rotatably connected to the other end of the guide shaft 16.

[0063] The spline hole four at the other end of the rotating shaft four 26 is plugged into the spline shaft three at the end of the guide rod 28. The other end of the guide rod 28 is connected to the output end of the motor through a coupling. The motor is electrically connected to the controller, and the motor is installed on the inner wall of the housing 1.

[0064] The principles and beneficial effects of the above scheme are:

[0065] When the guide shaft 16 needs to rotate, first start an electromagnet to work. The electromagnet is specifically: a through-type small and micro DC push-pull electromagnet with a reset spring. The slider 25 is moved to the left, and the gear three 27 on the rotating shaft four 26 is meshed and connected with the gear 22. The guide rod 28 drives the spline shaft three to move outward from the rotating shaft four 26. After the motor is started, the motor output end drives the coupling, the guide rod 28, the spline shaft three and the gear three 27 to rotate. The gear three 27 drives the gear 22, the rotating shaft three 21, the spline shaft two 20 and the guide shaft 16 to rotate, so that the blade rotating shaft and the blade rotating shaft two rotate at the same time, or the blade rotating shaft or the blade rotating shaft two rotates alone, and then the hydraulic oil is extracted from the oil storage tank 13, or the hydraulic oil is extracted from the pressure chamber. After the rotation of the guide shaft 16 is completed, the electromagnet is reset, and the slider 25 causes the gear three 27 to end the meshing connection with the gear 22;

[0066] When it is necessary to select the working order of the pump housing 14 and the pump housing 2 15, another electromagnet is started through the controller to move the slider 25 to the right, so that the gear three 27 is meshed with the gear two 24. When the motor rotates forward, the screw 23 reverses, and the guide plate 30 threadedly connected on the screw 23 drives the guide shaft 16 to move backward, so that the spline shaft 19 ends the plugging of the spline hole 2, and the spline hole is plugged with the spline shaft 19 at the same time, so that the pump housing 14 can work; when the motor reverses, the screw 23 rotates forward, and the guide plate 30 threadedly connected on the screw 23 drives the guide shaft 16 to move forward, so that the spline shaft 19 ends the plugging of the spline hole, and the spline hole 2 is plugged with the spline shaft 19 at the same time, so that the pump housing 2 15 can work. Through the integrated setting, the working efficiency of the device is greatly improved, and the complexity of the device during design is reduced. Based on the production and manufacturing of the device, the production cost can be greatly reduced.

[0067] Example 11: Reference Figure 1-Figure 12 The inner wall of one of the pressure chambers is connected to the end of a spiral cooling tube 31, which is arranged above the cooling mechanism. The other end of the spiral cooling tube 31 is sealed. The inner wall of the other pressure chamber is connected to the end of a spiral cooling tube 32. The spiral cooling tube 31 and the spiral cooling tube 32 have the same structure. The spiral cooling tube 31 and the spiral cooling tube 32 are both arranged around the mounting tube 5. The spiral cooling tube 31 contacts and cooperates with the end of the micro switch 33, and the spiral cooling tube 32 contacts and cooperates with the end of the micro switch 34. The micro switch 33 and the micro switch 34 are both fixed on the mounting tube 5 and electrically connected to the controller.

[0068] The cooling mechanism includes: a fan 35, an air inlet pipe 36, a filter air inlet box 37 and an exhaust filter 38. Two fans 35 are installed in the shell 1. The ends of the fans 35 are connected to the filter air inlet box 37 through the air inlet pipe 36. The filter air inlet box 37 is installed on the shell 1. The end surface of the filter air inlet box 37 with the filter is arranged away from the side wall of the shell 1. The output ends of the two fans 35 are respectively arranged toward the spiral cooling tube 31 and the spiral cooling tube 2 32. An exhaust filter 38 is installed on the top of the shell 1, and the exhaust filter 38 is arranged toward the mounting tube 5.

[0069] The principles and beneficial effects of the above scheme are:

[0070] The spiral cooling tube 31 is connected to one pressure chamber, and the spiral cooling tube 32 is connected to another pressure chamber. When the device starts to project, the light source 2 will generate a lot of heat due to its long-term operation. Therefore, the hydraulic oil used to adjust the focal length will increase in volume after absorbing heat. Such an increase in volume will cause the focal length of the lens 3 in operation to change. Based on the above technical problems, the device is provided with a spiral cooling tube 31 to receive the hydraulic oil in the corresponding pressure chamber outward, and to perform preliminary cooling on the outside of the mounting tube 5 to keep the volume of the hydraulic oil on the inner wall of the pressure chamber constant. When the device continues to work, the temperature continues to rise. At this time, the spiral cooling tube 31 and the spiral cooling tube 32 will expand and stretch under the action of the internal hydraulic oil. At this time, the spiral cooling tube 31 contacts and triggers the micro switch 33, and the spiral cooling tube 32 is turned off. The micro switch 32 contacts and triggers the micro switch 2 34, and the micro switch 33 and the micro switch 2 34 send signals to the controller, and the controller starts the fan 35 to work. One side of the fan 35 sucks the air filtered in the filter air inlet box 37 through the air inlet pipe 36, and the output end of the fan 35 blows out the air. Since the expansion of the spiral cooling tube 31 and the spiral cooling tube 2 32 is affected by the pressure of the hydraulic oil in the pressure chamber to which they are connected, only after the corresponding micro switch parts are triggered, the corresponding fan will choose to cool the spiral cooling tube 31 or the spiral cooling tube 2 32, and the cooled air is finally discharged through the exhaust filter 38, which can ensure that the hydraulic oil in the corresponding pressure chamber is cooled, and can also avoid the hydraulic oil in the pressure chamber with normal working temperature from being cooled, which greatly improves the stability of the device during operation and improves the rationality of the device design.

[0071] Example 12: Reference Figure 1-Figure 12The pipe 17 is connected with a locking tube 39, and the pipe 18 is connected with a locking tube 40. The end of the locking tube 39 is communicated with the side of the pipe 17 through a transfer tube 41, and the end of the locking tube 40 is communicated with the side of the pipe 18 through a transfer tube 42. A locking column 43 is slidably sealed in the locking tube 39, and two locking holes 44 are penetrated through the locking column 43. The two locking holes 44 are staggered with the axis of the pipe 17. The end of the locking column 43 is connected to the inner wall of the locking tube 39 through a locking spring 45. The locking column 43, the locking hole 44 and the locking spring 45 constitute a locking mechanism. Another locking mechanism is slidably sealed in the locking tube 40.

[0072] The locking tube 39 and the transfer tube 41 are both filled with hydraulic oil.

[0073] The principles and beneficial effects of the above scheme are:

[0074] A locking mechanism is connected to each of the locking tube 39 and the locking tube 40, and the two locking mechanisms are the same mechanism. When the pipeline 17 supplies hydraulic oil to the pressure chamber, the blade shaft rotates forward, the hydraulic oil pressure in the transfer tube 41 increases, and then the end of the locking column 43 is subjected to pressure to move it to the right. The synchronous locking spring 45 is compressed, and a locking hole 44 conducts the pipeline 17 to implement the supply of hydraulic oil to the pressure chamber. After the supply of hydraulic oil ends, the blade shaft stops working, the pressure supply of the hydraulic oil in the transfer tube 41 ends, and the locking column 43 is reset under the elastic force of the locking spring 45, and the pipeline 17 is closed to prevent The invention prevents the occurrence of hydraulic oil leakage after the device is zoomed, and ensures the stability after zooming; when the hydraulic oil in the pressure chamber needs to be extracted, the blade shaft is reversed, the pressure of the hydraulic oil in the transfer tube 41 is reduced, the end of the locking column 43 is subjected to pressure to move to the left, and the locking spring 45 is stretched, and the other locking hole 44 connects the pipeline 17. After the hydraulic oil in the pressure chamber is released, the blade shaft stops rotating in the opposite direction. When the pipeline 18 supplies and releases the hydraulic oil to the pressure chamber, the working principle of the locking mechanism therein is the same. The setting of the locking mechanism further improves the stability of the lens assembly in the lens 3 after the device is zoomed.

[0075] Example 13: Reference Figure 1-Figure 12 , a projector automatic zoom method, applied to a projector as described in any one of the above, comprising the following steps:

[0076] Comparing the real-time projector image data acquired by the image sensor with the theoretical projector image data based on the controller to obtain the zoom parameter;

[0077] Based on the zoom parameter, a spacing parameter of the two lens components in the lens 3 is obtained;

[0078] Based on the spacing parameter, the controller is used to start the hydraulic drive assembly 4 to adjust the distance between the two lens assemblies respectively;

[0079] After the distances between the two lens assemblies are adjusted respectively, the zoom of the projector is completed.

[0080] The principles and beneficial effects of the above scheme are:

[0081] The image sensor can timely transmit real-time projector image data to the controller, and obtain the zoom parameters through data comparison. Then the controller calculates the spacing parameters of the two lens assemblies, adjusts the distances of the two lens assemblies respectively, and completes the zoom of the projector. This method simplifies the zoom process and greatly reduces the complexity of the device for adjusting the distance between lens assemblies.

[0082] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A projector, characterized in that: include: A housing (1) is provided, wherein a controller, a light source (2) and a hydraulic drive assembly (4) are connected to the housing (1), an end of a lens (3) is connected to the light source (2), the other end of the lens (3) passes through a setting of the housing (1), the lens (3) is connected to the hydraulic drive assembly (4), an image sensor is mounted on the housing (1), and the image sensor, the light source (2) and the hydraulic drive assembly (4) are all electrically connected to the controller.

2. A projector according to claim 1, characterized in that: The lens (3) comprises a mounting tube (5), the light source (2) being threadedly connected to the inner wall of the end of the mounting tube (5), the other end of the mounting tube (5) being connected to a sealing mechanism (9), the side wall of the sealing mechanism (9) being plug-fitted into a circular hole of the housing (1).

3. A projector according to claim 2, characterized in that: The inner wall of the mounting tube (5) is provided with two annular grooves, each of which is provided with a guide ring (6) for sliding sealing, and the side wall of the guide tube (7) is connected to the inner wall of the guide ring (6) to seal the annular groove. A lens assembly is respectively provided in the two guide tubes (7).

4. A projector according to claim 3, characterized in that: The side wall of the guide tube (7), the side wall of the guide ring (6) and the inner wall of the annular groove form a pressure chamber, and the inner wall of the pressure chamber is connected to the output end of the hydraulic drive component (4).

5. A projector according to claim 4, characterized in that: The other side wall of the guide ring (6) is connected to the inner wall of the annular groove via a spring (8).

6. A projector according to claim 2, characterized in that: The sealing mechanism (9) comprises: a mounting arc (10), the end faces of two mounting arcs (10) are in contact with each other and form a plane mirror mounting tube, the side wall of the plane mirror mounting tube is plug-fitted with the circular hole, two guide posts (11) are installed on the end face of one mounting arc (10), the guide posts (11) are slidably connected to the guide holes on the end face of the other mounting arc (10), and the inner wall of the guide hole is connected to the guide posts (11) via a connecting spring (12).

7. A projector according to claim 6, characterized in that: The side wall at the end of the plane mirror mounting tube is threadedly connected to the inner wall of the other end of the mounting tube (5); the other end of the plane mirror mounting tube is arranged away from the side wall of the housing (1); the inner wall of the plane mirror mounting tube contacts and cooperates with the side wall of the plane mirror; a retaining ring is provided inside the plane mirror mounting tube; the retaining ring cooperates with retaining ring 2 on the inner wall of the other end of the mounting tube (5) to clamp the plane mirror.

8. A projector according to claim 7, characterized in that: The hydraulic drive assembly (4) comprises: an oil storage tank (13); the oil storage tank (13), a pump housing (14) and a second pump housing (15) are installed in the housing (1); the oil storage tank (13) is filled with hydraulic oil; the oil storage tank (13) is connected to the pump housing (14) via a circulation pipe; the oil tank (13) is connected to the second pump housing (15) via the second circulation pipe; the pump housing (14) is connected to a pressure chamber via a pipeline (17); and the second pump housing (15) is connected to another pressure chamber via a second pipeline (18).

9. A projector according to claim 8, characterized in that: The pump housing (14) is rotatably connected with a blade shaft, both ends of which are arranged outside the pump housing (14), and a spline hole is penetrated through the blade shaft. The pump housing (15) is rotatably connected with the blade shaft 2, both ends of which are arranged outside the pump housing (15), and a spline hole 2 is penetrated through the blade shaft 2. A guide shaft (16) is arranged in the spline hole and the spline hole 2. The spline shaft (19) on the guide shaft (16) is plug-fitted with the spline hole or the spline hole 2 or the spline hole and the spline hole 2, and the end of the guide shaft (16) is connected to the driving mechanism.

10. A projector automatic zoom method, applied to a projector according to any one of claims 1 to 8, characterized in that: The following steps are involved: Comparing the real-time projector image data acquired by the image sensor with the theoretical projector image data based on the controller to obtain the zoom parameter; Based on the zoom parameter, a spacing parameter of the two lens components in the lens (3) is obtained; Based on the spacing parameter, a controller is used to start a hydraulic drive assembly (4) to adjust the distance between the two lens assemblies respectively; After the distances between the two lens assemblies are adjusted respectively, the zoom of the projector is completed.

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