Motorized mechanism for translation adjustment

Abstract

The invention discloses a motorized mechanism for translation adjustment, and relates to the technical field of projector picture adjusting.The motorized mechanism for translation adjustment comprises a bottom plate, a cover plate, a movable plate and a position detection device, the cover plate is fixedly connected to the bottom plate, and a through hole is formed in the middle of the cover plate and used for translation receding of a projector; the movable plate is movably arranged between the bottom plate and the cover plate along a plane parallel to the bottom plate and is used for driving a projector connected to the movable plate to move along the plane parallel to the bottom plate; the position detection device is used for detecting the moving position of the moving plate; by adjusting the position of the movable plate and the position of the projector, the picture of the projector is adjusted, the position of the movable plate is detected in real time through the position detection device, recording is facilitated, and next adjustment is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of projector screen adjustment, and particularly to an electrified mechanism for translation adjustment. Background Art

[0002] Currently, the adjustment of the projector screen generally requires moving the entire projector to adapt the screen to the projector. After the placement position of the projector is fixed, the projection screen cannot be moved anymore. That is, when there is no position for the projector to move, the projection screen cannot be moved either, causing great inconvenience to users. Moreover, when adjusting the projector, there is a lack of detection of the specific position of the projector. Summary of the Invention

[0003] The main object of the present invention is to propose an electrified mechanism for translation adjustment, aiming to conveniently and accurately adjust the projection screen of the projector.

[0004] To achieve the above object, the electrified mechanism for translation adjustment proposed by the present invention includes:

[0005] A bottom plate;

[0006] A cover plate, fixedly connected to the bottom plate, and a through hole is formed in the middle of the cover plate for the translation of the projector to make way;

[0007] A moving plate, movably arranged between the bottom plate and the cover plate along a plane parallel to the bottom plate, for driving the projector connected to the moving plate to move along a plane parallel to the bottom plate; and,

[0008] A position detection device for detecting the moving position of the moving plate.

[0009] In one embodiment, the position detection device includes:

[0010] A TMR magnetic group induction chip assembly, arranged on the cover plate or the bottom plate;

[0011] A magnet, arranged on the moving plate, and arranged corresponding to the TMR magnetic group induction chip assembly in the up-down direction, for the TMR magnetic group induction chip assembly to detect the moving stroke of the magnet.

[0012] In one embodiment, the position detection device further includes:

[0013] The position detection device further includes:

[0014] Four optocoupler sensor assemblies, respectively arranged at both ends of the cover plate along the front-back direction and both ends along the left-right direction, and respectively arranged corresponding to both ends of the moving plate in the front-back direction and the left-right direction, for detecting the limit positions of the front-back, left-right moving ranges of the moving plate.

[0015] In one embodiment, the electrified mechanism for translational adjustment further includes:

[0016] A driving structure, including a stepping motor, for driving the moving plate to move in a plane parallel to the bottom plate.

[0017] In one embodiment, the moving plate includes a first moving plate for connecting with the projector;

[0018] The stepping motor includes a first stepping motor. The first stepping motor includes a first output shaft extending in the left - right direction, and a first driving gear is arranged on the first output shaft;

[0019] The driving structure further includes a front - rear driving structure, and the front - rear driving structure includes:

[0020] A first transmission gear, rotatably fixed to the left - right side wall of the cover plate along the left - right axis and meshing with the first driving gear;

[0021] A second transmission gear, rotatably fixed to the left - right side wall of the bottom plate along the left - right axis. The first driving gear, the first transmission gear, and the second transmission gear are meshed in sequence, and the number of teeth increases in sequence;

[0022] A third transmission gear, coaxially connected with the second transmission gear;

[0023] A second driving gear, rotatably installed on the side wall of the bottom plate along the left - right axis and meshing with the third transmission gear; and,

[0024] A longitudinal limiting structure for restricting the up - down movement of the first moving plate;

[0025] Wherein, a first driving groove is arranged on the second driving gear, and a first driving boss matching with the driving groove is convexly arranged on the left - right side wall of the first moving plate.

[0026] In one embodiment, the driving groove is an oval groove and extends along the radial direction of the second gear. The limiting boss is a cylinder, and the second gear is a sector gear.

[0027] In one embodiment, the electrified mechanism for translational adjustment further includes a synchronous transmission device, including:

[0028] A bracket, fixedly connected to the cover plate;

[0029] A guide rod, extending in the left - right direction and rotatably arranged on the bracket;

[0030] A first synchronous gear, arranged at one end of the guide rod and meshing with the second driving gear;

[0031] A second synchronizing gear is provided at the other end of the guide rod; and,

[0032] A third driving gear is rotatably mounted on the other side surface of the bottom plate and meshes with the second synchronizing gear. A second driving groove is provided on the third driving gear, and a second driving boss that cooperates with the driving groove protrudes from the other side wall of the moving plate in the left - right direction.

[0033] In an embodiment, the moving plate further includes a second moving plate, which is movably arranged between the first moving plate and the bottom plate in the left - right direction and is fixedly connected to the first moving plate;

[0034] The second moving plate protrudes downward with a third driving boss, and a left - right threaded hole is provided in the third driving boss along the left - right direction;

[0035] The stepping motor includes a second stepping motor. The second stepping motor includes a second output shaft extending in the left - right direction, and a fourth driving gear is provided on the second output shaft;

[0036] The driving structure further includes a left - right driving structure, and the left - right driving structure includes:

[0037] A lead screw, at least a part of which is provided with threads and cooperates with the threaded hole;

[0038] A fifth driving gear is sleeved on the lead screw to drive the lead screw to rotate along the left - right axis;

[0039] Wherein, the fifth driving gear meshes with the fourth driving gear through at least one transmission gear. During the rotation of the lead screw along the left - right axis, the third driving boss is driven to move in the left - right direction.

[0040] In an embodiment, a limiting hole is provided on the bottom plate along the up - down direction, and the limiting hole extends in the front - back direction. A limiting boss that cooperates with the limiting hole protrudes from the lower bottom surface of the moving plate along the up - down direction; and / or,

[0041] The bottom plate forms a limiting groove extending in the left - right direction corresponding to the third driving boss, and the third driving boss is arranged in the limiting groove.

[0042] In an embodiment, a positioning post protrudes upward from the upper end surface of the bottom plate, and a threaded hole is provided in the upper end surface of the positioning post along the up - down direction for threaded connection with the cover plate.

[0043] In the technical solution of the present invention, the electrified mechanism for translational adjustment includes a bottom plate, a cover plate, a moving plate, and a position detection device. The cover plate is fixedly connected to the bottom plate, and a through hole is formed in the middle of the cover plate for the translational accommodation of the projector. The moving plate is movably arranged between the bottom plate and the cover plate along a plane parallel to the bottom plate to drive the projector connected to the moving plate to move along a plane parallel to the bottom plate. The position detection device is used to detect the moving position of the moving plate. By adjusting the position of the moving plate, the position of the projector is adjusted, and then the picture of the projector is adjusted, eliminating the need to directly adjust the projector. The adjusted projector can be effectively fixed by the moving plate arranged between the bottom plate and the cover plate. The position of the moving plate is detected in real time by the position detection device, which is convenient for recording and for the next adjustment. In addition, when it is detected that the moving distance of the moving plate exceeds the predetermined range, timely adjustment can be made to increase the reliability of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0045] Figure 1 FIG. is a schematic structural diagram of an embodiment of the electrified mechanism for translational adjustment provided by the present invention;

[0046] Figure 2 is Figure 1 an exploded view of the electrified mechanism for translational adjustment in;

[0047] Figure 3 is Figure 1 a schematic structural diagram of another perspective of the electrified mechanism for translational adjustment in;

[0048] Figure 4 is Figure 1 an exploded view of the electrified mechanism for translational adjustment including a left - right driving structure in;

[0049] Figure 5 is Figure 1 an exploded view of another perspective of the electrified mechanism for translational adjustment including a left - right driving structure in;

[0050] Figure 6 is Figure 1 a schematic structural diagram of the bottom surface of the electrified mechanism for translational adjustment in.

[0051] Explanation of the reference numerals in the drawings:

[0052] 100. Electrically actuated mechanism with translational adjustment; 1. Base plate; 2. Cover plate; 21. Through hole; 3. Moving plate; 31. First moving plate; 32. Second moving plate; 321. Third driving boss; 322. Left - right threaded hole; 4. Position detection device 4; 41. TMR magnetic group induction chip assembly; 42. Magnet; 43. Opto - coupler sensor assembly; 5. Driving structure; 51. Stepper motor; 511. First stepper motor; 512. First output shaft; 513. First driving gear; 514. Second stepper motor; 515. Second output shaft; 516. Fourth driving gear; 52. Front - rear driving structure; 521. First transmission gear; 522. Second transmission gear; 523. Third transmission gear; 524. Second driving gear; 525. First driving groove; 526. First driving boss; 53. Left - right driving structure; 531. Lead screw; 532. Fifth driving gear; 533. Fourth transmission gear; 534. Fifth transmission gear; 535. Sixth transmission gear; 536. Limit groove; 6. Synchronous transmission device; 61. Bracket; 62. Guide rod; 63. First synchronous gear; 64. Second synchronous gear; 65. Third driving gear; 651. Second driving groove; 652. Second driving boss; 7. Limit hole; 8. Limit boss; 9. Positioning column; 91. Threaded hole.

[0053] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0054] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0055] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0056] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0057] The present invention provides an electrified mechanism 100 for translational adjustment.

[0058] Please refer to Figure 1 , in an embodiment of the present invention, the electrified mechanism 100 for translational adjustment includes a bottom plate 1, a cover plate 2, a moving plate 3, and a position detection device 4. The cover plate 2 is fixedly connected to the bottom plate 1. A through hole 21 is formed in the middle of the cover plate 2 for the translational accommodation of the projector. The moving plate 3 is movably arranged between the bottom plate 1 and the cover plate 2 along a plane parallel to the bottom plate 1 to drive the projector connected to the moving plate 3 to move along a plane parallel to the bottom plate 1. The position detection device 4 is used to detect the moving position of the moving plate 3.

[0059] In the technical solution of the present invention, the electrified mechanism 100 for translational adjustment includes a bottom plate 1, a cover plate 2, a moving plate 3, and a position detection device 4. The cover plate 2 is fixedly connected to the bottom plate 1. A through hole 21 is formed in the middle of the cover plate 2 for the translational accommodation of the projector. The moving plate 3 is movably arranged between the bottom plate 1 and the cover plate 2 along a plane parallel to the bottom plate 1 to drive the projector connected to the moving plate 3 to move along a plane parallel to the bottom plate 1. The position detection device 4 is used to detect the moving position of the moving plate 3. By adjusting the position of the moving plate 3, the position of the projector is adjusted, and then the picture of the projector is adjusted, avoiding directly adjusting the projector. The adjusted projector can be effectively fixed by the moving plate 3 arranged between the bottom plate 1 and the cover plate 2. And the position of the moving plate 3 is detected in real time by the position detection device 4, which is convenient for recording and convenient for next adjustment. In addition, when it is detected that the moving distance of the moving plate 3 exceeds a predetermined range, it can be adjusted in time to increase the reliability of the mechanism.

[0060] It can be understood that the movable plate 3 can be movable in various ways. For example, guide rails extending in the front-rear direction or left-right direction can be provided between the cover plate 2 and the bottom plate 1, and the movable plate 3 can be clamped in the guide rails, so as to move along the guide rails under manual or other external force drive. In an embodiment, please refer to Figures 2-3 , a driving structure 5 can also be provided. The driving structure includes a stepping motor 51, so as to drive the movable plate 3 to move in the front-rear direction or left-right direction. By using the stepping motor 51 to drive the movable plate 3, compared with manual adjustment, it can save manpower and precisely control the adjustment amplitude each time, and it is easier to achieve an ideal projection effect. It can be understood that, in order to more precisely control the movable plate 3, the stepping motor 51 can also be adaptively replaced with a servo motor to achieve more precise control in some occasions where cost is not a concern.

[0061] Specifically, there are various ways for the stepping motor 51 to drive the movable plate 3. For example, a crank-link mechanism can be connected to the output shaft of the stepping motor 51. The output shaft of the stepping motor 51 is rotatably connected to the crank, and the link is connected to the movable plate 3, so as to drive the movable plate 3 to move in the front-rear direction. Of course, the crank-link mechanism can also be adaptively replaced with a ball screw structure. The present invention does not limit this as long as the rotation can be converted into linear motion.

[0062] In an embodiment of the present invention, please refer to Figures 2-3, the moving plate 3 includes a first moving plate 31 for connecting with the projector; the stepping motor includes a first stepping motor 511, the first stepping motor 511 includes a first output shaft 512 extending in the left-right direction, and a first driving gear 513 is arranged on the first output shaft 512; the driving structure further includes a front-back driving structure 52, the front-back driving structure 52 includes a first transmission gear 521, a second transmission gear 522, a third transmission gear 523, a second driving gear 524 and a longitudinal limiting structure; the first transmission gear 521 is rotatably fixed on the left-right side wall of the cover plate 2 along the axis in the left-right direction; the second transmission gear 522 is rotatably fixed on the left-right side wall of the bottom plate 1 along the axis in the left-right direction, and the first driving gear 513, the first transmission gear 521 and the second transmission gear 522 are meshed with each other in sequence one by one, and the number of teeth increases in sequence; the third transmission gear 523 is coaxially connected with the second transmission gear 522; the second driving gear 524 is rotatably installed on the side wall of the bottom plate 1 along the axis in the left-right direction and is meshed with the third transmission gear 523; the longitudinal limiting structure is used to limit the movement of the first moving plate 31 in the up-down direction; wherein, a first driving groove 525 is arranged on the second driving gear 524, and a first driving boss 526 matched with the first driving groove 525 is protruded on the left-right side wall of the first moving plate 31. It can be understood that according to the law of conservation of energy, the input power P1 of the driving gear is equal to the output power P2 of the driven gear, that is, P1 = P2, and the power P = Tω, so T1ω1 = T2ω2. From ω1r1 = ω2r2, we can get ω1 / ω2 = r2 / r1, and substituting it into T1ω1 = T2ω2, we get T2 / T1 = r2 / r1. This shows that the ratio of the torque T2 of the driven gear to the torque T1 of the driving gear is equal to the ratio of the radius r2 of the driven gear to the radius r1 of the driving gear. That is, in a gear set, the torque is proportional to the gear radius / number of teeth. In order to better drive the movement of the first moving plate 31, the first transmission gear 521 and the second transmission gear 522 with the number of teeth increasing in sequence are set, while reducing the transmission pressure, the torque of the stepping motor is amplified. In addition, by arranging the gears from top to bottom in sequence, the occupied space in the left-right direction is effectively saved; by arranging a first driving groove 525 on the second driving gear 524, the first driving groove 525 follows the rotation of the second gear and drives the first moving plate 31 to move through the first driving boss 526. However, by arranging a longitudinal limiting structure to limit the movement of the first moving plate 31 in the up-down direction, the first moving plate 31 only synchronizes the displacement of the second driving gear 524 in the front-back direction.

[0063] Wherein, the longitudinal limiting device may be that a limiting plate extends from the left and right side walls of the cover plate 2 or the bottom plate 1 towards the first driving boss 526, and a limiting straight groove extending in the front-back direction is provided corresponding to the position of the first driving boss 526 for the first driving boss 526 to pass through and restricting it to move only in the front-back direction. It may also be that a second limiting straight groove extending in the front-back direction is provided on the surface of the cover plate 2 or the bottom plate 1 facing the first moving plate 31, and a slider clamped in the second limiting straight groove or a ball capable of rolling in the second limiting straight groove is convexly provided on the first moving plate 31 to restrict its movement in the up-down direction; the present invention does not limit the specific structure of the longitudinal limiting device, as long as it can restrict its movement in the up-down direction.

[0064] The third transmission gear 523 is coaxially connected to the second transmission gear 522. The second driving gear 524 is rotatably installed on the side surface of the bottom plate 1. A first driving groove 525 is provided on the second driving gear 524. A first driving boss 526 that cooperates with the first driving groove 525 protrudes from the other side wall of the first moving plate 31 in the left-right direction.

[0065] The first driving groove 525 may extend radially along the second driving gear 524 or deviate from the radial direction of the second driving gear 524 to obtain different front-back moving speeds. Specifically, in an embodiment of the present invention, the first driving groove 525 is an elliptical groove and extends along the radial direction of the second gear. The limiting boss 8 is a cylinder, and the second gear is a sector gear. With such a setting, the pressure on the first driving boss 526 is reduced, wear is reduced, and the service life is improved. In addition, it can be understood that the moving distance of the first moving plate 31 is not large, and the rotation amplitude of the second gear is also not large, and not all gears need to participate in the transmission. Therefore, the second gear is set as a sector gear, thereby further saving space; the present invention does not limit the central angle size of the sector gear and can be changed according to actual needs.

[0066] It can be understood that if only one of the driving bosses drives the moving plate 3 to move, the moving plate 3 is subjected to a unilateral force, is prone to deflection due to torque, affects the forward and backward movement accuracy, and will damage the moving plate 3. Therefore, in an embodiment of the present invention, the electrified mechanism 100 for translational adjustment further includes a synchronous transmission device 6, including a bracket 61, a guide rod 62, a first synchronous gear 63, a second synchronous gear 64, and a third synchronous gear: The bracket 61 is fixedly connected to the cover plate 2; The guide rod 62 extends in the left-right direction and is rotatably arranged on the bracket 61; The first synchronous gear 63 is arranged at one end of the guide rod 62 and meshes with the second driving gear 524; The second synchronous gear 64 is arranged at the other end of the guide rod 62; A third driving gear 65 is rotatably installed on the other side of the bottom plate 1 and meshes with the second synchronous gear 64. A second driving groove 651 is provided on the third driving gear 65, and a second driving boss 652 that cooperates with the driving groove is convexly provided on the other side wall of the moving plate 3 in the left-right direction. By such an arrangement, the other side wall of the moving plate 3 in the left-right direction is also subjected to a forward and backward driving force, thereby balancing the torque, improving the forward and backward movement accuracy, and protecting the moving plate 3. Specifically, the third driving gear 65, the second driving groove 651, and the second driving boss 652 can all be set to be the same as the second driving gear 524, the first driving groove 525, and the first driving boss 526.

[0067] In addition, in order to increase the adjustment range of the projector and meet the requirement of precise left-right adjustment, in an embodiment of the present invention, please refer to Figures 4-5 , the moving plate 3 further includes a second moving plate 32, which is movably arranged between the first moving plate 31 and the bottom plate 1 in the left-right direction and is fixedly connected to the first moving plate 31; The second moving plate 32 is convexly provided with a third driving boss 321 downward, and a left-right threaded hole is opened in the third driving boss 321 in the left-right direction; The stepping motor includes a second stepping motor 514, and the second stepping motor 514 includes a second output shaft 515 and a fourth driving gear 516; The driving structure further includes a left-right driving structure 53, and the left-right driving structure 53 includes: A lead screw 531, at least a part of which is provided with a thread and cooperates with the left-right threaded hole; A fifth driving gear 532 is sleeved on the lead screw 531 to drive the lead screw 531 to rotate along the left-right axis; Wherein, the fifth driving gear 532 is meshed with the fourth driving gear 516 through at least one transmission gear, and during the rotation of the lead screw 531 along the left-right axis, the second moving plate 32 is driven to move in the left-right direction.

[0068] By setting it like this, the second stepping motor 514 drives the lead screw 531 to rotate along the left-right axis, and the lead screw 531 and the left-right threaded hole form a ball screw structure, so as to convert the rotation of the lead screw 531 into a linear motion of the third driving boss 321 along the left-right direction, and then drive the second moving plate 32 to move along the left-right direction. The second moving plate 32 is fixedly connected to the first moving plate 31, and finally drives the first moving plate 31 and the projector to move in the left-right direction. By setting the second moving plate 32 and the left-right driving structure 53, the first moving plate 31 and the second moving plate 32 are respectively responsible for translations in two directions, realizing the need for free adjustment in all directions in the plane parallel to the bottom plate 1, and improving the adjustment flexibility. It should be noted that when the second moving plate 32 drives the first moving plate 31 to move in the left-right direction, the first driving boss 526 and the second driving boss 652 respectively move in the left-right direction in the first driving groove 525 and the second driving groove 651. Therefore, the first driving boss 526 and the second driving boss 652 can be lengthened respectively to prevent them from falling out of the grooves.

[0069] In addition, by setting at least one transmission gear, while improving the transmission pressure, since the fifth driving gear 532 and the fourth driving gear 516 do not need to be directly meshed, the installation positions of the second stepping motor 514 and the lead screw 531 are more flexible, and other devices inside the electrified mechanism 100 for translation adjustment can be avoided, which is convenient for the overall design of the device. It can be understood that the specific setting positions and quantities of the at least one transmission gear in the present invention are not limited and can be changed according to actual needs. In this embodiment, the at least one transmission gear includes a fourth transmission gear 533, a fifth transmission gear 534 and a sixth transmission gear 535. The fourth transmission gear 533 is rotatably fixed to the left-right side wall of the cover plate 2 along the left-right axis and meshes with the fourth driving gear 516; the fifth transmission gear 534 is rotatably fixed to the left-right side wall of the cover plate 2 along the left-right axis and meshes with the fourth transmission gear 533. The sixth transmission gear 535 is coaxially connected to the fifth transmission gear 534 and meshes with the fifth driving gear 532. In this way, the second stepping motor 514 and the lead screw 531 can be respectively arranged above and below the electrified mechanism 100 for translation adjustment, which is convenient for the overall design of the device; in addition, the sixth transmission gear 535 is arranged outside the fifth transmission gear 534, so that the fifth driving gear 532 is also outside the driving structure and has a left-right deviation from the third transmission gear 523, avoiding interference with the front-back driving structure 52.

[0070] Further, a limiting groove 536 extending in the left - right direction is formed on the bottom plate 1 corresponding to the third driving boss 321, and the third driving boss 321 is arranged in the limiting groove 536. In this way, the moving distance of the second moving plate 32 is limited, preventing interference between the projector on the first moving plate 31 and the cover plate 2 and causing damage to the projector.

[0071] In an embodiment of the present invention, please refer to Figure 6 , a limiting hole 7 is formed in the bottom plate 1 in the up - down direction, and the limiting hole 7 extends in the front - back direction. A limiting boss 8 that cooperates with the limiting hole 7 protrudes from the lower bottom surface of the moving plate 3 in the up - down direction. In this way, the moving distance of the moving plate 3 in the front - back direction is limited, preventing interference between the projector on the moving plate 3 and the cover plate 2 and causing damage to the projector. In addition, it can be understood that when the moving plate 3 is manually adjusted or the above - mentioned left - right driving structure 53 is provided, there is a need to adjust the moving plate 3 in the left - right direction. For this purpose, the limiting hole 7 can also extend in the left - right direction for the moving plate 3 to move.

[0072] Further, in order to reduce the wear of each boss and the above - mentioned holes or grooves, rolling bearings can also be sleeved on the first driving boss 526, the second driving boss 652, and the limiting boss 8, converting their sliding with the holes or grooves into rolling, reducing wear, and improving service life.

[0073] In order to more accurately detect whether the moving plate 3 moves beyond a predetermined range, the position detection device 4 further includes four opto - coupler sensor components, which are respectively arranged at both ends of the cover plate 2 in the front - back direction and both ends in the left - right direction, and are respectively arranged corresponding to both ends of the moving plate 3 in the front - back direction and the left - right direction, for detecting the extreme positions of the moving range of the moving plate 3 in the front - back and left - right directions. It should be noted that the opto - coupler sensor component is an electronic component that realizes electrical isolation through optical signals. Its core principle is to convert the electrical signal at the input end into an optical signal through an optical medium, and then restore the optical signal to an electrical signal at the output end, thereby realizing electrical isolation between the input and output. In this embodiment, it detects the distance between the moving plate 3 and it through an optical medium and compares it with a preset distance, so as to judge whether the moving plate 3 moves beyond a predetermined range. When the distance detected by one of the two opto - coupler sensor components is too close, it can be judged that the moving plate 3 exceeds the moving range, and then the electrical connection is quickly cut off, causing the electrified mechanism 100 of the translation adjustment to stop, facilitating timely adjustment and repair. With such a setting, the degree of electrification is further improved, manpower is reduced, and the reliability of the mechanism is increased.

[0074] In addition, in an embodiment of the present invention, a positioning post 9 protrudes upward from the upper end surface of the bottom plate 1, and a threaded hole 91 is formed in the upper end surface of the positioning post 9 in the vertical direction for threaded connection with the cover plate 2; in this way, the bottom plate 1 and the cover plate 2 can be reliably connected; the present invention does not limit the number and layout positions of the positioning post 9 and the threaded hole 91, and can be changed according to actual needs and space occupation conditions. In an embodiment, four positioning posts 9 are provided and are respectively arranged at intervals around the bottom plate 1, which can prevent the moving plate 3 from falling out while ensuring firm connection.

[0075] In an embodiment of the present invention, the position detection device 4 includes a TMR magnetic group induction chip assembly and a magnet 42. The TMR magnetic group induction chip assembly is arranged on the cover plate 2 or the bottom plate 1; the magnet 42 is arranged on the moving plate 3 and is arranged corresponding to the TMR magnetic group induction chip assembly in the vertical direction for the TMR magnetic group induction chip assembly to detect the moving stroke of the magnet 42. It should be noted that the TMR magnetic group induction chip assembly is a high-precision magnetic sensor based on the tunnel magnetoresistance effect, with the characteristics of sensitivity, stability and low power consumption, and can accurately detect the moving stroke of the magnet 42. By arranging the TMR magnetic group induction chip assembly, the position of the moving plate 3 can be accurately detected, which is convenient for quickly adjusting to the desired position, or by recording the moving position this time, it is convenient to directly adjust when there is the same projection distance next time; in addition, when it is detected that the moving distance of the moving plate 3 exceeds a predetermined range, it can be adjusted in time to increase the reliability of the mechanism.

[0076] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An electrified mechanism with translational adjustment, for a projector, characterized in that, Comprising: Bottom plate; Cover plate, fixedly connected to the bottom plate, with a through hole formed in the middle of the cover plate for the projector to make a translational concession; Moving plate, movably arranged between the bottom plate and the cover plate along a plane parallel to the bottom plate, for driving the projector connected to the moving plate to move along a plane parallel to the bottom plate; and, Position detection device, for detecting the moving position of the moving plate.

2. The electrified mechanism with translational adjustment according to claim 1, characterized in that, The position detection device includes: TMR magnetic group induction chip assembly, arranged on the cover plate or the bottom plate; Magnet, arranged on the moving plate, and arranged corresponding to the TMR magnetic group induction chip assembly in the up-down direction, for the TMR magnetic group induction chip assembly to detect the moving stroke of the magnet.

3. The electrified mechanism with translational adjustment according to claim 1, wherein, The position detection device further includes: Four optocoupler sensor assemblies, respectively arranged at both ends of the cover plate along the front-back direction and both ends along the left-right direction, and respectively arranged corresponding to both ends of the moving plate in the front-back direction and the left-right direction, for detecting the limit positions of the front-back, left-right moving ranges of the moving plate.

4. The electrified mechanism with translational adjustment according to claim 1, wherein, The electrified mechanism for translational adjustment further includes: Drive structure, including a stepper motor, for driving the moving plate to move along a plane parallel to the bottom plate.

5. The electrified mechanism with translational adjustment according to claim 4, characterized in that, The moving plate includes a first moving plate for connecting with the projector; The stepper motor includes a first stepper motor, the first stepper motor includes a first output shaft extending along the left-right direction, and a first driving gear is arranged on the first output shaft; The drive structure further includes a front-back drive structure, and the front-back drive structure includes: First transmission gear, rotatably fixed to the left-right side walls of the cover plate along the axis in the left-right direction, and meshing with the first driving gear; Second transmission gear, rotatably fixed to the left-right side walls of the bottom plate along the axis in the left-right direction, and the first driving gear, the first transmission gear and the second transmission gear are meshed in sequence, and the number of teeth increases in sequence; Third transmission gear, the third transmission gear is coaxially connected with the second transmission gear; Second driving gear, rotatably installed on the side wall of the bottom plate along the axis in the left-right direction, and meshing with the third transmission gear; and, Longitudinal limiting structure, for limiting the up-down movement of the first moving plate; Wherein, a first driving groove is arranged on the second driving gear, and first driving bosses are convexly arranged on the left-right side walls of the first moving plate and are matched with the driving groove.

6. The electrified mechanism with translational adjustment according to claim 5, characterized in that, The driving groove is an elliptical groove and extends along the radial direction of the second gear, the limiting boss is a cylinder, and the second gear is a sector gear.

7. The electrified mechanism with translational adjustment according to claim 5, characterized in that, The electrified mechanism for translational adjustment further includes a synchronous transmission device, including: Bracket, fixedly connected to the cover plate; Guide rod, extending along the left-right direction and rotatably arranged on the bracket; First synchronous gear, arranged at one end of the guide rod and meshing with the second driving gear; Second synchronous gear, arranged at the other end of the guide rod; and, Third driving gear, rotatably installed on the other side of the bottom plate, and meshing with the second synchronous gear, a second driving groove is arranged on the third driving gear, and second driving bosses are convexly arranged on the other left-right side wall of the moving plate and are matched with the driving groove.

8. The electrified mechanism with translational adjustment according to claim 5, characterized in that, The moving plate further includes a second moving plate, which is movably arranged between the first moving plate and the bottom plate in the left-right direction and is fixedly connected to the first moving plate; The second moving plate is convexly provided with a third driving boss downward, and the third driving boss is provided with a left-right threaded hole in the left-right direction; The stepping motor includes a second stepping motor, the second stepping motor includes a second output shaft extending in the left-right direction, and a fourth driving gear is arranged on the second output shaft; The driving structure further includes a left-right driving structure, and the left-right driving structure includes: A lead screw, at least a part of which is provided with a thread and is matched with the threaded hole; A fifth driving gear, which is sleeved on the lead screw and is used to drive the lead screw to rotate along the left-right axis; Wherein, the fifth driving gear is meshed with the fourth driving gear through at least one transmission gear, and during the rotation of the lead screw along the left-right axis, the third driving boss is driven to move in the left-right direction.

9. The electrified mechanism with translational adjustment according to claim 8, characterized in that, The bottom plate is provided with a limiting hole extending in the up-down direction, the limiting hole extends in the front-back direction, and the lower bottom surface of the moving plate is convexly provided with a limiting boss matched with the limiting hole; and / or, The bottom plate is formed with a limiting groove extending in the left-right direction corresponding to the third driving boss, and the third driving boss is arranged in the limiting groove.

10. The electrified mechanism with translational adjustment according to claim 1, wherein The upper end surface of the bottom plate is convexly provided with a positioning column, and the upper end surface of the positioning column is provided with a threaded hole in the up-down direction for threaded connection with the cover plate.

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