A shift platform of a projection lens

Abstract

This invention discloses a tilt-shifting platform for a projection lens, relating to the field of projection lens technology. It includes a lens, a base, a first driving mechanism, a second driving mechanism, and a first driving part for driving the first driving mechanism and moving along the Y-axis, and a second driving part for driving the second driving mechanism and moving along the X-axis. Both the first and second driving mechanisms are disposed inside the base. The first driving part is mounted on one side of the outer wall of the base and is connected to the first driving mechanism. In this invention, the lens can be adjusted relative to the base along the Y-axis under the action of the first driving mechanism, and can also be adjusted relative to the base along the X-axis under the action of the second driving mechanism. This allows the lens to be tilt-shifted in two-dimensional space. Compared with existing technologies, the X-axis guide rail / rod and its cooperating components are eliminated, and a slider is used instead of the guide rail, reducing the size and achieving a miniaturized design.

Description

Technical Field

[0001] This invention relates to the field of projection lens technology, and more specifically to a tilt-shift platform for a projection lens. Background Technology

[0002] Currently available tilt-shift platforms require guide rods for fixation along both the X and Y axes. This fixation method makes the overall structure of the tilt-shift platform more complex, increasing the difficulty of installation and maintenance. Furthermore, the multiple guide rods occupy considerable space, resulting in a larger platform size, which is not conducive to use in space-constrained scenarios. Balancing cost and miniaturization while maintaining image quality is a significant design challenge. Summary of the Invention

[0003] The purpose of this invention is to provide a tilt-shift platform for a projection lens to solve the above-mentioned problems.

[0004] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0005] A tilt-shift platform for a projection lens includes a lens, a base, a first driving mechanism, a second driving mechanism, a first driving part for driving the first driving mechanism and moving along the Y-axis, and a second driving part for driving the second driving mechanism and moving along the X-axis. Both the first and second driving mechanisms are disposed inside the base. The first driving part is mounted on one side of the outer wall of the base and is connected to the first driving mechanism. The second driving part is located on the outer wall of the base and is fixedly connected to the first driving mechanism. The output shaft of the second driving part is connected to the second driving mechanism. A platform is provided on the top of the base, and the lens is mounted on the platform. The platform is fixedly connected to the second driving mechanism. Multiple sliders for supporting the second driving mechanism are disposed inside the base.

[0006] As a preferred embodiment of the present invention, the first driving mechanism includes two guide rails, a Y-axis sliding plate, a first L-shaped connecting plate, and a first ball screw. The two guide rails are symmetrically arranged at the bottom of the base, and guide blocks are slidably connected to both guide rails. The Y-axis sliding plate is fixed on the two guide blocks. The first L-shaped connecting plate is fixed on the top of the Y-axis sliding plate near the first driving part. The first ball screw is mounted on the first L-shaped connecting plate, and the output shaft of the first driving part is coaxially fixed with the first ball screw.

[0007] As a preferred embodiment of the present invention, the second driving mechanism includes an X-axis sliding plate, a second L-shaped connecting plate, a second ball screw, and a plurality of threaded fixing seats. The X-axis sliding plate is located inside the Y-axis sliding plate. The second L-shaped connecting plate is fixedly connected to the top of the X-axis sliding plate on the side near the second driving part. The second ball screw is mounted on the second L-shaped connecting plate. The output shaft of the second driving part is coaxially fixed with the second ball screw.

[0008] As a preferred embodiment of the present invention, the base has multiple grooves inside, and the multiple sliders are respectively fixed in the multiple grooves by dispensing glue, and the X-axis sliding plate presses on the multiple sliders.

[0009] As a preferred embodiment of the present invention, studs are provided at the four corners of the bottom of the platform, and the studs are respectively connected to the threaded fixing seats one by one.

[0010] As a preferred embodiment of the present invention, the base is provided with a movable groove for the lens to move, the platform fits against the bottom of the movable groove, and the movable groove is closed.

[0011] As a preferred embodiment of the present invention, a movement detection system is provided on the X-axis sliding plate, the movement detection system includes two sheet metal plates, and PCB boards corresponding to the sheet metal plates are provided on both sides of the top of the Y-axis sliding plate.

[0012] As a preferred embodiment of the present invention, a groove for moving the second drive unit is also provided on the side wall of the base.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] In this invention, the lens can be adjusted relative to the base along the Y-axis under the action of the first driving mechanism, and can also be adjusted relative to the base along the X-axis under the action of the second driving mechanism. This allows the lens as a whole to be tilt-shifted in two-dimensional space, thereby enabling the adjustment of the image position without moving the projection device. The operation is convenient and assembly is simple. Compared with existing technologies, this invention eliminates the X-axis guide rail / rod and its cooperating components, using a slider instead of the guide rail, further reducing the overall size and achieving a miniaturized design. At the same time, the slider has the advantages of strong load-bearing capacity and lower cost than the slide rail, achieving low cost and easy assembly, and optimizing the lens tilt-shifting platform. Attached Figure Description

[0015] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 This invention provides a schematic diagram of the overall structure of a tilt-shift platform for a projection lens;

[0017] Figure 2 A cross-sectional view of a tilt-shift platform for a projection lens provided by the present invention;

[0018] Figure 3 This is a schematic diagram from another perspective of the tilt-shift platform for a projection lens provided by the present invention;

[0019] Figure 4 This invention provides a schematic diagram of the connection structure between the first driving mechanism and the second driving mechanism;

[0020] Figure 5 A schematic diagram of the slider is provided for this invention.

[0021] The labels in the diagram represent the following:

[0022] 1. Lens; 2. Base; 3. First drive mechanism; 4. Second drive mechanism; 5. First drive unit; 6. Second drive unit; 7. Platform; 8. Slider; 9. Groove; 10. Movable groove; 11. Sheet metal sheet; 12. PCB board; 13. Slide groove;

[0023] 31. Guide rail; 32. Y-axis sliding plate; 33. First L-shaped connecting plate; 34. First ball screw; 35. Guide block; 41. X-axis sliding plate; 42. Second L-shaped connecting plate; 43. Second ball screw; 44. Threaded fixing seat; 45. Stud. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figures 1-5As shown, the present invention provides a tilt-shift platform for a projection lens, including a lens 1, a base 2, a first drive mechanism 3, a second drive mechanism 4, a first drive part 5 for driving the first drive mechanism 3 to move along the Y-axis, and a second drive part 6 for driving the second drive mechanism 4 to move along the X-axis. The first drive mechanism 3 and the second drive mechanism 4 are both disposed inside the base 2. The first drive part 5 is installed on one side of the outer wall of the base 2 and is connected to the first drive mechanism 3. The second drive part 6 is located on the outer wall of the base 2 and is fixedly connected to the first drive mechanism 3. The output shaft of the second drive part 6 is connected to the second drive mechanism 4. A platform 7 is provided on the top of the base 2, the lens 1 is mounted on the platform 7, and the platform 7 is fixedly connected to the second drive mechanism 4. A plurality of sliders 8 for supporting the second drive mechanism 4 are provided inside the base 2.

[0026] In this embodiment, the lens 1 is first mounted on the platform 7. Next, the power to the first drive unit 5 and the second drive unit 6 is turned on, putting them into a working state. The first drive unit 5 is activated, and it begins to drive the first drive mechanism 3 to move along the Y-axis. Since the second drive unit 6 is fixedly connected to the first drive mechanism 3, it moves along the Y-axis together with the first drive mechanism 3.

[0027] During the movement of the first drive mechanism 3, the second drive mechanism 4, supported by the slider 8, will also move accordingly in the Y-axis direction along with the first drive mechanism 3. Since the platform 7 is fixedly connected to the second drive mechanism 4, the lens 1 mounted on the platform 7 will also move in the Y-axis direction along with the platform 7, thus achieving the tilt-shifting operation of the lens 1 in the Y-axis direction.

[0028] When it is necessary to shift the lens 1 along the X-axis, the second drive unit 6 is activated. The output shaft of the second drive unit 6 starts working, driving the second drive mechanism 4 to move along the X-axis. Since the platform 7 is fixedly connected to the second drive mechanism 4, the platform 7 will move along the X-axis with the lens 1, thereby completing the shift of the lens 1 along the X-axis.

[0029] By controlling the first drive unit 5 and the second drive unit 6 respectively, the position of the lens 1 in the X and Y axes can be precisely adjusted, realizing the tilt-shift function of the projection lens 1. During the tilt-shift process, the slider 8 plays a good supporting and guiding role, ensuring the smoothness and accuracy of the movement of the second drive mechanism 4, making the tilt-shift operation of the lens 1 more stable and precise, meeting different projection needs, such as playing an important role in projecting at special angles or correcting projection image distortion.

[0030] In this invention, the lens 1 can be adjusted relative to the base 2 along the Y-axis under the action of the first driving mechanism 3, and can be adjusted relative to the base 2 along the X-axis under the action of the second driving mechanism 4, so that the lens 1 as a whole can be adjusted in two-dimensional space, thereby realizing the movement of the image without moving the projection device. It is convenient to adjust, simple to assemble, small in size and low in cost.

[0031] Specifically, the first drive mechanism 3 includes two guide rails 31, a Y-axis sliding plate 32, a first L-shaped connecting plate 33, and a first ball screw 34. The two guide rails 31 are symmetrically arranged at the bottom of the base 2, and guide blocks 35 are slidably connected to both guide rails 31. The Y-axis sliding plate 32 is fixed on the two guide blocks 35. The first L-shaped connecting plate 33 is fixed on the top of the Y-axis sliding plate 32 near the side of the first drive unit 5. The first ball screw 34 is mounted on the first L-shaped connecting plate 33, and the output shaft of the first drive unit 5 is coaxially fixed with the first ball screw 34.

[0032] The second drive mechanism 4 includes an X-axis sliding plate 41, a second L-shaped connecting plate 42, a second ball screw 43, and multiple threaded fixing seats 44. The X-axis sliding plate 41 is located inside the Y-axis sliding plate 32. The second L-shaped connecting plate 42 is fixedly connected to the top of the X-axis sliding plate 41 on the side near the second drive unit 6. The second ball screw 43 is mounted on the second L-shaped connecting plate 42. The output shaft of the second drive unit 6 is coaxially fixed with the second ball screw 43.

[0033] The base 2 has multiple grooves 9 inside, and multiple sliders 8 are fixed in the multiple grooves 9 by dispensing glue, and the X-axis sliding plate 41 presses on the multiple sliders 8.

[0034] During operation, when the first drive unit 5 starts running, its output shaft drives the first ball screw 34 to rotate. Since the first ball screw 34 is mounted on the first L-shaped connecting plate 33, and the first L-shaped connecting plate 33 is fixed on the Y-axis sliding plate 32, and the Y-axis sliding plate 32 is slidably connected to the guide rail 31 through the guide block 35, the rotation of the first ball screw 34 will cause the Y-axis sliding plate 32 to slide along the guide rail 31 in the Y-axis direction, thereby realizing the tilt-shifting operation of the projection lens 1 in the Y-axis direction.

[0035] Similarly, when the second drive unit 6 is activated, its output shaft drives the second ball screw 43 to rotate. Since the second ball screw 43 is mounted on the second L-shaped connecting plate 42, and the second L-shaped connecting plate 42 is fixed on the X-axis sliding plate 41, and the X-axis sliding plate 41 presses against the slider 8, the rotation of the second ball screw 43 will cause the X-axis sliding plate 41 to slide in the X-axis direction inside the Y-axis sliding plate 32, thereby realizing the tilt-shifting operation of the projection lens 1 in the X-axis direction.

[0036] This design allows the projection lens 1 to move flexibly in both the X and Y axes, meeting different projection needs. Furthermore, the cooperation between the guide rail 31 and the guide block 35 ensures the stability and accuracy of the Y-axis sliding plate 32, while the slider 8 reduces friction during the sliding of the X-axis sliding plate 41, improving the smoothness of the tilt-shift. Compared to existing technologies, the X-axis guide rail 31 / guide rod and its mating components are eliminated, and the slider 8 replaces the guide rail 31, further reducing the size and achieving a miniaturized design. Moreover, the slider 8 has advantages such as high load-bearing capacity and lower cost than the guide rail, achieving low cost and easy assembly, thus optimizing the lens tilt-shift platform. Simultaneously, the first drive unit 5 and the second drive unit 6 independently control the X-axis and Y-axis tilt-shift, facilitating precise adjustments by the operator according to actual conditions.

[0037] Each of the four corners of the bottom of the platform 7 is provided with a stud 45, and the stud 45 is connected to a threaded fixing seat 44 in a corresponding manner.

[0038] This design allows platform 7 to be securely mounted on the corresponding equipment, enhancing the stability of the entire tilt-shift platform 7 of the projection lens 1. In actual use, the tight connection between the stud 45 and the threaded fixing seat 44 effectively prevents platform 7 from shaking or shifting during tilt-shifting operations, thus ensuring the accuracy of the tilt-shifting of the projection lens 1. Moreover, this connection method facilitates disassembly and installation, allowing operators to easily perform maintenance or component replacement on platform 7, improving the maintainability and efficiency of the equipment.

[0039] The base 2 has a movable groove 10 for the lens 1 to move. The platform 7 fits snugly against the bottom of the movable groove 10, sealing the groove 10. The movable groove 10 not only facilitates the movement and adjustment of the lens 1 when the platform 7 moves, but also effectively prevents dust, debris, and other contaminants from entering the groove 10, avoiding any obstruction or damage to the lens 1's movement, thus extending the lifespan of the lens 1 and the entire tilt-shift platform 7. Furthermore, sealing the movable groove 10 reduces interference from external environmental factors, such as airflow, making the movement of the lens 1 within the groove 10 smoother and more stable. Simultaneously, the tight fit between the platform 7 and the bottom of the movable groove 10 enhances the overall sealing of the structure, helping to maintain a relatively stable environment within the groove 10 and providing favorable conditions for the precise movement of the lens 1.

[0040] The X-axis sliding plate 41 is equipped with a movement detection system, which includes two sheet metal plates 11. The top sides of the Y-axis sliding plate 32 are equipped with PCB boards 12 corresponding to the sheet metal plates 11.

[0041] When the X-axis sliding plate 41 moves on the Y-axis sliding plate 32, the sheet metal plate 11 moves along with it, while the PCB board 12 remains fixed on the Y-axis sliding plate 32. By monitoring the relative positional changes between the sheet metal plate 11 and the PCB board 12, the motion detection system can accurately detect the movement of the X-axis sliding plate 41. This detection method features high precision and high sensitivity, providing real-time feedback on the movement distance and direction of the X-axis sliding plate 41. Operators can precisely control the movement of the X-axis sliding plate 41 based on the data from the motion detection system, thereby achieving precise tilt-shifting of the projection lens 1 along the X-axis. Simultaneously, the motion detection system provides the foundation for the automated control of the entire tilt-shifting platform 7, making the tilt-shifting operation of the projection lens 1 more intelligent and convenient. The configuration of the sheet metal plate 11 and the PCB board 12 in this detection system is existing technology, and its technical principles will not be elaborated upon here.

[0042] The base 2 also has a slide groove 13 on its side wall for the second drive unit 6 to move.

[0043] The slide groove 13 ensures that the second drive unit 6 can move smoothly and easily within it. At the same time, the length of the slide groove 13 can meet the maximum stroke requirements of the second drive unit 6 during operation, allowing the second drive unit 6 to move within a sufficient range on the side wall of the base 2.

[0044] The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A tilt-shift platform for a projection lens, characterized in that, The device includes a lens (1), a base (2), a first drive mechanism (3), a second drive mechanism (4), a first drive part (5) for driving the first drive mechanism (3) and moving along the Y-axis, and a second drive part (6) for driving the second drive mechanism (4) and moving along the X-axis. The first drive mechanism (3) and the second drive mechanism (4) are both located inside the base (2). The first drive part (5) is installed on one side of the outer wall of the base (2) and is connected to the first drive mechanism (3). The second drive part (6) is located on the outer wall of the base (2) and is fixedly connected to the first drive mechanism (3). The output shaft of the second drive part (6) is connected to the second drive mechanism (4). A platform (7) is provided on the top of the base (2). The lens (1) is installed on the platform (7). The platform (7) is fixedly connected to the second drive mechanism (4). Multiple sliders (8) for supporting the second drive mechanism (4) are provided inside the base (2).

2. The tilt-shift platform for a projection lens according to claim 1, characterized in that: The first drive mechanism (3) includes two guide rails (31), a Y-axis sliding plate (32), a first L-shaped connecting plate (33), and a first ball screw (34). The two guide rails (31) are symmetrically arranged at the bottom of the base (2), and guide blocks (35) are slidably connected to both guide rails (31). The Y-axis sliding plate (32) is fixed on the two guide blocks (35). The first L-shaped connecting plate (33) is fixed on the top of the Y-axis sliding plate (32) near the first drive unit (5). The first ball screw (34) is installed on the first L-shaped connecting plate (33), and the output shaft of the first drive unit (5) is coaxially fixed with the first ball screw (34).

3. The tilt-shift platform for a projection lens according to claim 2, characterized in that: The second drive mechanism (4) includes an X-axis sliding plate (41), a second L-shaped connecting plate (42), a second ball screw (43), and multiple threaded fixing seats (44). The X-axis sliding plate (41) is located inside the Y-axis sliding plate (32). The second L-shaped connecting plate (42) is fixedly connected to the top of the X-axis sliding plate (41) on the side near the second drive unit (6). The second ball screw (43) is mounted on the second L-shaped connecting plate (42). The output shaft of the second drive unit (6) is coaxially fixed with the second ball screw (43).

4. The tilt-shift platform for a projection lens according to claim 1, characterized in that: The base (2) has multiple grooves (9) inside, and multiple sliders (8) are fixed in the multiple grooves (9) by dispensing glue, and the X-axis sliding plate (41) presses on the multiple sliders (8).

5. The tilt-shift platform for a projection lens according to claim 1, characterized in that: The platform (7) is provided with studs (45) at the four corners of the bottom, and the studs (45) are respectively connected to the threaded fixing seats (44) one by one.

6. The tilt-shift platform for a projection lens according to claim 1, characterized in that: The base (2) has an movable groove (10) for the lens (1) to move. The platform (7) fits against the bottom of the movable groove (10) and closes the movable groove (10).

7. The tilt-shift platform for a projection lens according to claim 1, characterized in that: The X-axis sliding plate (41) is provided with a movement detection system, which includes two sheet metal pieces (11). The top sides of the Y-axis sliding plate (32) are provided with PCB boards (12) corresponding to the sheet metal pieces (11).

8. The tilt-shift platform for a projection lens according to claim 1, characterized in that: The base (2) also has a groove (13) on its side wall for the second drive unit (6) to move.

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