Projection equipment position adjustment bracket

Abstract

The embodiment of the present application provides a projection device position adjustment bracket, which relates to the technical field of projection devices. The projection device position adjustment bracket includes a fixed seat, a first adjustment mechanism and a second adjustment mechanism. The fixed seat is used to fix the projection device, and the fixed seat is fixedly connected to a first transmission member. The first adjustment mechanism is arranged on a side of the fixed seat close to the first transmission member, and includes a first adjustment seat, a first drive assembly and a second transmission member, and the first drive assembly is transmission-connected to the first transmission member to drive the fixed seat to rotate around the first axis. The second adjustment mechanism is located on a side of the first adjustment mechanism away from the fixed seat, and includes a second adjustment seat and a second drive assembly, and the second drive assembly is transmission-connected to the second transmission member, and the second transmission member drives the first adjustment seat, and the first adjustment seat drives the fixed seat to move up and down or pitch. The projection device position adjustment bracket has a simple structure, is easy to adjust, and has high adjustment accuracy, which is conducive to improving the position adjustment efficiency of the projection device.

Description

Technical Field

[0001] The present application belongs to the technical field of projection equipment, and more specifically, relates to a projection equipment position adjustment bracket. Background Art

[0002] A projector is a device that can project images or videos onto a projection screen and is widely used in homes, offices, schools and entertainment venues.

[0003] With the development of technology, there are now ultra-short focal length projector products on the market, which can project a 100-inch or even larger picture at a distance of about 0.7 meters. Due to the short-distance projection, a slight movement of the projector position will cause a large deviation between the projected picture and the projection screen.

[0004] At present, when installing a projector, the position of the projector is manually adjusted so that the projection image can be projected to a suitable position of the projection screen. However, the position accuracy of the projector is poor when it is manually adjusted. Summary of the invention

[0005] The purpose of the present application includes, for example, providing a projection device position adjustment bracket to improve the above-mentioned problems.

[0006] The embodiments of the present application can be implemented as follows:

[0007] A projection device position adjustment bracket is provided, which includes a fixed seat, a first adjustment mechanism and a second adjustment mechanism. The fixed seat is used to carry and fix the projection device, and a first transmission member is fixedly connected to a side of the fixed seat away from the projection device. The first adjustment mechanism is arranged on a side of the fixed seat close to the first transmission member, and the first adjustment mechanism includes a first adjustment seat and a first drive assembly and a second transmission member arranged on the first adjustment seat, and the first drive assembly is connected to the first transmission member to drive the fixed seat to rotate around a first axis. The second adjustment mechanism is arranged on a side of the first adjustment mechanism away from the fixed seat, and the second adjustment mechanism includes a second adjustment seat and a second drive assembly arranged on the second adjustment seat, and the second drive assembly is connected to the second transmission member, and the second transmission member drives the first adjustment seat, and the first adjustment seat drives the fixed seat to move up and down or pitch.

[0008] Further, the second transmission member includes an outer ring, a nut, a first sliding shaft and a second sliding shaft. The nut is rotatably embedded in the outer ring, the first sliding shaft is connected to both sides of the outer ring in the radial direction and is slidably connected to the first adjustment seat, the second sliding shaft is radially inserted into the outer ring and is rotatably connected to the nut, and the first sliding shaft and the second sliding shaft have an angle. The second driving assembly includes a second driving member and a screw rod that is transmission-connected to the second driving member, the screw rod is connected to the second adjustment seat along the extension direction of the first axis, and is threadedly connected to the nut.

[0009] Furthermore, the number of the second transmission members is at least three, the number of the second drive assembly and the second transmission members is equal and corresponds one to one, and at least three second transmission members are not located on the same straight line. When the movement heights of the nuts in all the second transmission members are equal, the first adjustment mechanism can drive the fixed seat to rise and fall relative to the second adjustment mechanism along the extension direction of the first axis. When the movement heights of the nuts in all the second transmission members are unequal, the first adjustment mechanism can drive the fixed seat to pitch relative to the second adjustment mechanism around a second axis having an angle with the first axis, or a third axis having an angle with both the first axis and the second axis.

[0010] Furthermore, the second transmission member also includes a fixing member, which is fixedly connected to the first adjustment seat, and the fixing member is provided with a sliding hole, and the first sliding shaft is slidably arranged in the sliding hole.

[0011] Furthermore, the first drive assembly includes a first drive member and a first gear transmission connected to the first drive member, the first transmission member includes a rotating shaft and a second gear, the rotating shaft is fixedly connected to the fixed seat, the second gear is keyed to the rotating shaft and meshes with the first gear for transmission, and the first drive member drives the fixed seat to swing around the first axis through the first transmission member.

[0012] Furthermore, the first driving assembly also includes a combined bearing, which is fixedly connected to the first adjustment seat, and one end of the rotating shaft away from the fixed seat is rotatably arranged in the combined bearing.

[0013] Furthermore, it also includes a third adjustment mechanism, which is arranged on a side of the second adjustment mechanism away from the first adjustment mechanism. The third adjustment mechanism includes a driving wheel assembly, the driving wheel assembly drives the second adjustment mechanism, the second adjustment mechanism drives the first adjustment mechanism, and the first adjustment mechanism drives the fixed seat to move linearly along the extension direction of the second axis that has an angle with the first axis.

[0014] Furthermore, the third adjustment mechanism also includes a third adjustment seat and a support wheel. The third adjustment seat is arranged on the side of the second adjustment mechanism away from the first adjustment mechanism. The drive wheel assembly is connected to the side of the third adjustment seat close to the second adjustment mechanism. The support wheel is rotatably connected to the circumference of the side of the third adjustment seat away from the second adjustment mechanism.

[0015] Furthermore, the third adjustment seat is provided with a through hole, and the driving wheel assembly includes a third driving member and a driving wheel which are transmission-connected, the third driving member is connected to the third adjustment seat, the driving wheel is passed through the through hole, and is located on the same plane as the supporting wheel, and the third driving member drives the projection device position adjustment bracket to move linearly via the driving wheel.

[0016] Furthermore, the third adjusting mechanism also includes a steering wheel assembly, which is transmission-connected to the driving wheel assembly so that the driving wheel assembly can be steered around the first axis.

[0017] Furthermore, the steering wheel assembly includes a fourth driving member, a worm wheel and a worm, the fourth driving member is connected to the worm, the worm is transmission-connected to the worm wheel, and the driving wheel assembly is fixedly connected to the worm wheel and rotates synchronously with the worm wheel.

[0018] Furthermore, an opening and closing clamp is provided on a side of the fixed seat facing away from the first transmission member, and the opening and closing clamp includes a first clamping mechanism and a second clamping mechanism, the first clamping mechanism is relatively arranged along a first direction and is slidably connected to the fixed seat, and the second clamping mechanism is relatively arranged along a second direction having an angle with the first direction and is slidably connected to the fixed seat, and the first clamping mechanism and the second clamping mechanism enclose an installation area for fixing the projection device.

[0019] Furthermore, the first clamping mechanism includes a stopper and a first elastic member, the fixing seat is provided with a sliding portion along the first direction, the stopper is slidably connected to the sliding portion, and the first elastic member is installed on a side of the stopper away from the installation area.

[0020] The embodiment of the present application provides a projection device position adjustment bracket, which is provided with a three-layer structure of a fixed seat, a first adjustment mechanism and a second adjustment mechanism, wherein the projection device is fixedly connected to the fixed seat, the first adjustment mechanism drives the fixed seat and the projection device to rotate around a first axis; the second adjustment mechanism drives the first adjustment mechanism, the fixed seat and the projection device to move up and down or pitch along the extension direction of the first axis; thereby achieving height adjustment of the projection device along the extension direction of the first axis, angle adjustment of rotation around the first axis, pitch adjustment of rotation around a second axis having an angle with the first axis, and pitch adjustment of rotation around a third axis having an angle with both the first axis and the second axis through the projection device position adjustment bracket. The adjustment is convenient and accurate, which is conducive to improving the efficiency of position adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 An exploded schematic diagram of a structure of a projection device position adjustment bracket provided in an embodiment of the present application;

[0023] Figure 2 for Figure 1 A schematic structural diagram of a structure of a middle fixing seat from a first perspective;

[0024] Figure 3 for Figure 2 A schematic structural diagram of the middle fixed seat from a second viewing angle;

[0025] Figure 4 A schematic diagram of another structure of a fixing seat in a projection device position adjustment bracket provided in an embodiment of the present application;

[0026] Figure 5 A structural schematic diagram of a first viewing angle of a first adjustment mechanism in a projection device position adjustment bracket provided in an embodiment of the present application;

[0027] Figure 6 for Figure 5 A schematic structural diagram of the first drive assembly in FIG.

[0028] Figure 7 A schematic diagram of the structure of a second viewing angle of a first adjustment mechanism in a projection device position adjustment bracket provided in an embodiment of the present application;

[0029] Figure 8 A schematic diagram of the adjustment of the first adjustment mechanism and the second adjustment mechanism in the projection device position adjustment bracket provided in an embodiment of the present application;

[0030] Fig. 9 for Figure 7 A schematic structural diagram of the second transmission member;

[0031] Fig.10 for Figure 1 An exploded schematic diagram of the first adjusting mechanism and the second adjusting mechanism;

[0032] Fig.11 An exploded schematic diagram of another structure of a projection device position adjustment bracket provided in an embodiment of the present application;

[0033] Fig.12 for Fig.11 An exploded schematic diagram of the third adjustment mechanism from a first viewing angle;

[0034] Fig.13 for Fig.11 Schematic diagram of the exploded view of the third adjustment mechanism from the second perspective.

[0035] Icons: 100-projection device position adjustment bracket; 101-first axis; 103-second axis; 105-third axis; 110-fixed seat; 112-first surface; 114-second surface; 116-first transmission member; 1161-rotating shaft; 1163-second gear; 118-identification sticker; 120-opening and closing fixture; 121-first direction; 123-second direction; 125-installation area; 127-first clamping mechanism; 1271-stop block; 1273-first elastic member; 1275-sliding part; 129-second clamping mechanism; 130-first adjustment mechanism; 131-first adjustment seat; 133-first driving assembly; 1331-first driving member; 1333-first gear; 1335-combined bearing; 137-second transmission member; 1371-outer ring; 1373-nut; 1375-first sliding shaft; 1377-second sliding shaft; 1379-fixing member; 140-second adjusting mechanism; 141-second adjusting seat; 1410-clearance hole; 143-second driving assembly; 1431-second driving member; 1433-screw; 150-third adjusting mechanism; 151-third adjusting seat; 1510-through hole; 153-support wheel; 155-driving wheel assembly; 1551-third driving member; 1553-driving wheel; 157-steering wheel assembly; 1571-fourth driving member; 1573-worm wheel; 1575-worm; 160-projection equipment. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] In the description of the present invention, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0039] Ultra-short focal length projection equipment can project a 100-inch or even larger screen at a distance of about 0.7 meters. When projecting, the projection screen position of the projector needs to be completely consistent with the projection screen position to achieve a better projection effect.

[0040] For ultra-short focal length projection equipment, a slight movement of the projector's position often causes the projection image to shift significantly. And when installing the projection equipment, the projection image needs to be manually adjusted to a suitable position on the projection screen.

[0041] However, when adjusting the projection image, the position of the projection image needs to be adjusted repeatedly. The manual adjustment method has poor accuracy and is troublesome to adjust repeatedly, resulting in low adjustment efficiency.

[0042] Based on the above questions, please refer to Figure 1 , the embodiment of the present application provides a projection device position adjustment bracket 100. The projection device position adjustment bracket 100 can be adjusted in height along the extension direction of the first axis 101, can be swung around the first axis 101 for angle adjustment, can be swung around the second axis 103 for pitch adjustment, can be swung around the third axis 105 for pitch adjustment, etc. It should be noted that in the embodiment of the present invention, the first axis 101, the second axis 103 and the third axis 105 can correspond to the Z axis, the X axis and the Y axis in the coordinate system respectively. Among them, the first axis 101, the second axis 103 and the third axis 105 can be perpendicular to each other, or they can be non-perpendicular to each other. When the first axis 101, the second axis 103 and the third axis 105 are perpendicular to each other, the plane formed by the second axis 103 and the third axis 105 can be a horizontal plane, and the second axis 103 and the third axis 105 can extend horizontally in two directions perpendicular to each other in the horizontal plane; the plane formed by the second axis 103 and the first axis 101 and the plane formed by the third axis 105 and the first axis 101 can be vertical planes, and the first axis 101 can extend in the vertical direction in the vertical plane.

[0043] It can be understood that the extension direction of the first axis 101 can be the height direction of the projection device position adjustment bracket 100, the extension direction of the second axis 103 can be the length direction of the projection device position adjustment bracket 100, and the extension direction of the third axis 105 can be the width direction of the projection device position adjustment bracket 100.

[0044] The projection device position adjustment bracket 100 provided in the embodiment of the present application can be applicable to a projection device 160 of 100 inches or even larger, and can be applied to home projectors and engineering projectors to adjust the position of home or engineering projectors that need to adjust the position. Alternatively, it can also be integrated into a laser TV cabinet and used as a set with a laser projector, or integrated into a large projector and an engineering projector as a whole. The projection device position adjustment bracket 100 provided in the embodiment of the present application has a wide range of applications, for example, it can be used in scenes such as home, office, school, entertainment venues, etc., and the present application does not limit its application venues.

[0045] Please continue to refer to Figure 1 The projection device position adjustment bracket 100 may include a fixing seat 110, a first adjustment mechanism 130 and a second adjustment mechanism 140. The fixing seat 110 is used to carry and fix the projection device 160, and provide support for the projection device 160. The projection device 160 is placed or installed on the top of the fixing seat 110. The first adjustment mechanism 130 is installed below the fixing seat 110, and is used to drive the fixing seat 110 to drive the projection device 160 to rotate around the first axis 101, that is, to adjust the angular position of the projection device 160 in the left and right directions. The second adjustment mechanism 140 is arranged below the first adjustment mechanism 130, and is used to drive the first adjustment mechanism 130 to drive the fixing seat 110 to move up and down or pitch, that is, to adjust the height position of the projection device 160 in the vertical direction and the angular position in the up and down directions.

[0046] For details, please refer to Figure 2 , Figure 3 and Figure 4 The fixing base 110 is a thin plate structure, including a first surface 112 and a second surface 114 which are opposite to each other. The projection device 160 is fixedly installed at the middle position of the first surface 112 of the fixing base 110 .

[0047] Alternatively, if Figure 2 As shown, a mounting label 118 is provided at a corner position corresponding to the first surface 112 of the fixing base 110 and the mounting area 125 of the projection device 160. The area enclosed by the mounting label 118 just matches the size of the projection device 160, so that when the user installs the projection device 160, the position of the projection device 160 can be adjusted by comparing the position of the mounting label 118, thereby obtaining a relatively ideal fixed position.

[0048] Furthermore, a silicone anti-skid pad may be attached to the surface of the first surface 112 of the fixing base 110 , so as to facilitate the projection device 160 to be stably installed on the fixing base 110 .

[0049] Considering that the models, sizes and specifications of current projection devices 160 are not completely consistent, in order to improve the versatility of the projection device position adjustment bracket 100, it can be applied to projection devices 160 of various specifications. Figure 3 The first surface 112 of the fixing seat 110 is provided with an opening and closing fixture 120. The opening and closing fixture 120 can be elastically adjusted within a certain size range to be suitable for projection devices 160 of different sizes.

[0050] The opening and closing clamp 120 may include a first clamping mechanism 127 and a second clamping mechanism 129. The first clamping mechanism 127 and the second clamping mechanism 129 are arranged in pairs, and the first clamping mechanism 127 is arranged oppositely along the first direction 121, and the second clamping mechanism 129 is arranged oppositely along the second direction 123. The first clamping mechanism 127 arranged oppositely is slidably connected to the fixing seat 110 along the first direction 121, and the second clamping mechanism 129 arranged oppositely is slidably connected to the fixing seat 110 along the second direction 123. The first direction 121 and the second direction 123 have an angle, and the first clamping mechanism 127 and the second clamping mechanism 129 enclose an installation area 125 for fixing the projection device 160. Since the first clamping mechanism 127 and the second clamping mechanism 129 are elastically connected to the fixing seat 110 , after the projection device 160 is installed, the projection device 160 can be naturally clamped and positioned to the middle position of the fixing seat 110 under the elastic clamping action of the first clamping mechanism 127 and the second clamping mechanism 129 .

[0051] Specifically, the first clamping mechanism 127 may include a stopper 1271 and a first elastic member 1273. The stopper 1271 is arranged to extend in a direction perpendicular to the first direction 121, and the first elastic member 1273 is elastically connected to a side of the stopper 1271 away from the installation area 125, and the first elastic member 1273 provides a pre-tightening thrust for the stopper 1271, so that the stopper 1271 can clamp the projection device 160 located in the installation area 125. Matching with the stopper 1271, the fixing seat 110 is provided with a sliding portion 1275 along the first direction 121, and the stopper 1271 is slidably connected to the sliding portion 1275.

[0052] It is understandable that when the sliding portion 1275 is a slide groove, the block 1271 includes a slider matching the slide groove, and the slider is embedded in the slide groove. Under the preload thrust of the first elastic member 1273, the block 1271 slides along the slide groove toward the installation area 125, thereby clamping and positioning the projection device 160 located in the installation area 125. When the sliding portion 1275 is a slide rail, the block 1271 includes a slide groove matching the slide rail, and the block 1271 is clamped on the slide rail. Under the preload thrust of the first elastic member 1273, the block 1271 slides toward the installation area 125 along the extension of the slide rail, thereby clamping and positioning the projection device 160 located in the installation area 125. Considering that the projection device 160 is installed in the installation area 125, when the sliding portion 1275 is a slide rail, the slide rail may interfere with the projection device 160, which is not conducive to the installation stability of the projection device 160. In the embodiment of the present application, the sliding portion 1275 adopts a sliding groove structure design.

[0053] Further, the second clamping mechanism 129 may include a spring stopper, which is disposed on both sides of the installation area 125 along the second direction 123. The spring stopper may include a stopper and a second elastic member, which is elastically connected to the stopper, and the second elastic member is located on a side of the stopper away from the installation area 125, and the second elastic member is used to provide a pre-tightening thrust for the stopper. The center position of the installation area 125 formed by the first clamping mechanism 127 and the second clamping mechanism 129 coincides with the center position of the first transmission member 116.

[0054] It can be understood that the rebound displacement of the first elastic member 1273, the length of the sliding portion 1275, and the size adjustment range of the projection device 160 along the first direction 121 match. In other words, the sliding length of the stopper 1271 pushed by the first elastic member 1273 along the sliding portion 1275 should meet the size adjustment range of different projection devices 160 along the first direction 121, and the projection device 160 is limited along the first direction 121 by the first clamping mechanism 127. Similarly, the rebound displacement of the spring limit block matches the size adjustment range of the projection device 160 along the second direction 123, and the projection device 160 is limited along the second direction 123 by the second clamping mechanism 129.

[0055] Optionally, the first direction 121 and the second direction 123 are perpendicular, and the first direction 121 is parallel to one side of the projection device 160, and the second direction 123 is parallel to the other side of the projection device 160, so that projection devices 160 of different specifications and sizes can be clamped and positioned at the center of the installation area 125. It should be noted that when the outer structure of the projection device 160 is other shapes such as a circle or a triangle, the specific structures of the first clamping mechanism 127 and the second clamping mechanism 129 can be adaptively changed to achieve the purpose of clamping the projection device 160. This application does not make specific restrictions on this, as long as the projection device 160 can be clamped and fixed at the center of the installation area 125 by opening and closing the clamp 120.

[0056] Please also see Figure 4 The first transmission member 116 is fixedly connected to the second surface 114 of the fixing base 110, that is, the first transmission member 116 and the projection device 160 are respectively located on the two opposite sides of the fixing base 110. The first transmission member 116 is used to cooperate with the first adjustment mechanism 130 and drive the fixing base 110 to rotate around the first axis 101.

[0057] Optionally, the first transmission member 116 is installed at the center of the fixing base 110 , and the rotation axis 1161 of the first transmission member 116 coincides with the installation axis (not shown) of the projection device 160 .

[0058] Please refer to Figure 5 , Figure 6 and Figure 7 As shown, the first adjustment mechanism 130 is arranged on a side of the fixed seat 110 close to the first transmission member 116, and the first adjustment mechanism 130 may include a first adjustment seat 131, a first driving assembly 133 and a second transmission member 137. The first driving assembly 133 and the second transmission member 137 are respectively arranged on the first adjustment seat 131, wherein the first driving assembly 133 is transmission-connected with the first transmission member 116 arranged on the fixed seat 110, and is used to provide driving force to the first transmission member 116. The second transmission member 137 is used to be transmission-connected with the second adjustment mechanism 140, so that the second transmission member 137 is driven to move under the driving action of the second adjustment mechanism 140, thereby driving the fixed seat 110 to move synchronously.

[0059] Specifically, the first driving assembly 133 includes a first driving member 1331 and a first gear 1333 drivingly connected to the first driving member 1331. The first gear 1333 is keyed to the power output shaft of the first driving member 1331 so that the first driving member 1331 drives the first gear 1333 to rotate synchronously. The first transmission member 116 that cooperates with the first driving assembly 133 includes a rotating shaft 1161 and a second gear 1163 (such as Figure 3The rotating shaft 1161 is fixedly connected to the fixing base 110, the second gear 1163 is key-connected to the rotating shaft 1161, and the second gear 1163 is meshed with the first gear 1333 in the first driving assembly 133. The first driving member 1331 drives the first gear 1333 to rotate, the first gear 1333 drives the second gear 1163 to rotate, and the second gear 1163 drives the rotating shaft 1161 to rotate so that the fixing base 110 rotates synchronously around the first axis 101.

[0060] Optionally, the first driving member 1331 adopts a stepper motor, which can rotate forward and reverse, thereby driving the fixed seat 110 to swing clockwise or counterclockwise around the first axis 101. By setting the speed and duration of the stepper motor, the fixed seat 110 can drive the projection device 160 to swing around the first axis 101 within a range of ±10 degrees. It can be understood that the swing angle of the fixed seat 110 driving the projection device 160 around the first axis 101 can be adjusted according to actual needs. For example, it can be set to swing around the first axis 101 within a range of ±5 degrees. The specific swing angle is not limited and is determined according to the actual use occasion of the projection device 160 and the actual required adjustment range.

[0061] Optionally, the first gear 1333 adopts a small gear, and the second gear 1163 adopts a large gear. The power output shaft of the stepper motor is key-connected with the small gear to realize synchronous rotation, and the power is transmitted to the large gear and drives the large gear to rotate through the meshing transmission of the small gear and the large gear. Since the number of teeth of the small gear is less than the number of teeth of the large gear, the rotation speed of the small gear is greater than the rotation speed of the large gear during the meshing transmission, thereby reducing the output speed of the first drive component 133. The swing direction and swing angle of the fixed seat 110 are controlled by the rotation of the power output shaft of the stepper motor, and the meshing transmission of the small gear and the large gear is conducive to improving the angle adjustment accuracy of the fixed seat 110 when it swings along the first axis 101.

[0062] In order to avoid axial misalignment between the first gear 1333 and the second gear 1163 due to installation errors, the tooth width of the first gear 1333 is optionally greater than the tooth width of the second gear 1163. Even if there are some installation errors during the installation, the actual meshing tooth width of the first gear 1333 and the second gear 1163 can be guaranteed, which is beneficial to improving the connection strength of the gears and increasing the service life.

[0063] The transmission ratio of the first gear 1333 and the second gear 1163 is equal to the ratio of the number of teeth of the second gear 1163 to the number of teeth of the first gear 1333. It can be understood that in the meshing transmission of the first gear 1333 and the second gear 1163, when the transmission ratio of the first gear 1333 and the second gear 1163 is too large, the size of the second gear 1163 is large, resulting in a large overall volume of the adjustment bracket and inconvenient processing of the second gear 1163; when the transmission ratio of the first gear 1333 and the second gear 1163 is too small, the gear reduction efficiency is low. In order to avoid the above-mentioned drawbacks, the transmission ratio of the first gear 1333 and the second gear 1163 should be avoided to be too large or too small. Optionally, the transmission ratio should be adaptively selected according to the requirements of the motor and structural design.

[0064] The projection device position adjustment bracket 100 provided in the embodiment of the present application is placed on a desktop when in use, and the projection device 160 is installed on the fixing seat 110. The first driving component 133 drives the first transmission member 116 to rotate. In order to provide a certain support to the fixing seat 110 during the rotation process, the first driving component 133 optionally further includes a combined bearing 1335. Please refer to Figure 6 The combined bearing 1335 is fixedly connected to the first adjustment seat 131, and the end of the rotating shaft 1161 in the first transmission member 116 away from the fixed seat 110 is rotatably inserted into the combined bearing 1335. The combined bearing 1335 fixes and supports the fixed seat 110 and the projection device 160, and the fixed seat 110 can achieve smoother rotation relative to the first adjustment mechanism 130 through the combined bearing 1335 under the action of gear transmission. The combined bearing 1335 can bear both axial force and radial force. Optionally, the combined bearing 1335 can adopt a combination of thrust bearing and rolling bearing, thereby achieving the purpose of high transmission accuracy and low noise.

[0065] Please refer to Figure 7 and Figure 8 The second adjustment mechanism 140 is located on a side of the first adjustment mechanism 130 away from the fixed seat 110. The second adjustment mechanism 140 may include a second adjustment seat 141 and a second driving assembly 143, the second driving assembly 143 is arranged on the second adjustment seat 141, and the second driving assembly 143 is in transmission connection with the second transmission member 137, and is used to drive the first adjustment mechanism 130 to drive the fixed seat 110 to move up and down along the first axis 101, or to drive the fixed seat 110 to move up and down by arranging a plurality of second driving assemblies 143 and cooperating with each other to drive the fixed seat 110 to move up and down, thereby achieving adjustment of the pitch angle.

[0066] Optionally, the number of the second transmission members 137 on the first adjustment mechanism 130 and the second drive assembly 143 on the second adjustment mechanism 140 is the same and corresponds one to one. In order to achieve lifting motion or pitching motion along the first axis 101, the number of the second transmission members 137 is at least three, and at least three second transmission members 137 are not located on the same straight line. When the number of the second transmission members 137 is three and they are not located on the same straight line, the three second transmission members 137 form a triangle shape.

[0067] When the second driving assembly 143 drives all the second transmission members 137 to rise to the same height position, the first adjusting mechanism 130 drives the fixed seat 110 to be parallel with the second adjusting mechanism 140, and only the height along the first axis 101 is different, that is, it drives the fixed seat 110 and the projection device 160 to perform lifting movement along the first axis 101.

[0068] When the second driving component 143 drives all the second transmission members 137 to rise to a height position that is not completely equal, the first adjusting mechanism 130 drives the fixed seat 110 to tilt relative to the second adjusting mechanism 140, that is, the first adjusting mechanism 130 drives the fixed seat 110 and the projection device 160 to perform a pitch motion around the second axis 103 or the third axis 105 relative to the second adjusting mechanism 140 to adjust the angle of the projection picture of the projection device 160 in the vertical direction.

[0069] Optionally, the second driving assembly 143 includes a second driving member 1431 and a screw 1433, and the screw 1433 is in transmission connection with the second driving member 1431. The screw 1433 is connected to the second adjustment seat 141 and extends along the first axis 101. The screw 1433 is in transmission connection with the second transmission member 137, and the rotation of the screw 1433 can be converted into the axial movement of the second transmission member 137 along the screw 1433.

[0070] For details, please refer to Fig. 9The second transmission member 137 may include an outer ring 1371, a nut 1373, a first sliding shaft 1375, and a second sliding shaft 1377. The nut 1373 is rotatably sleeved on the screw rod 1433, and the nut 1373 is converted into movement along the axial direction of the screw rod 1433 as the screw rod 1433 rotates. At the same time, the nut 1373 is rotatably embedded in the outer ring 1371, and the first sliding shaft 1375 and the second sliding shaft 1377 are cross-shaped and connected to the radial direction of the outer ring 1371. When connected, the first sliding shaft 1375 is connected to both sides of the outer ring 1371 in the radial direction, and the first sliding shaft 1375 is slidably connected to the first adjustment seat 131; the second sliding shaft 1377 is radially penetrated through the outer ring 1371 and is rotatably connected to the nut 1373, so that when the nut 1373 moves axially along the screw rod 1433, the outer ring 1371 can rotate around the second sliding shaft 1377 relative to the nut 1373.

[0071] Optionally, an angle is formed between the first sliding shaft 1375 and the second sliding shaft 1377, the second sliding shaft 1377 is used to make the outer ring 1371 rotate around the second sliding shaft 1377, and the first sliding shaft 1375 is used to drive the outer ring 1371 to move axially along the second sliding shaft 1377. It can be understood that the first sliding shaft 1375 and the second sliding shaft 1377 can be perpendicular or substantially perpendicular.

[0072] Since the first sliding shaft 1375 can drive the outer ring 1371 to move along its axial direction, optionally, the second transmission member 137 further includes a fixing member 1379. The fixing member 1379 is fixedly connected to the first adjustment seat 131, and the fixing member 1379 is provided with a through sliding hole, and the first sliding shaft 1375 can be slidably penetrated in the sliding hole. When sliding, the first sliding shaft 1375 drives the outer ring 1371 to slide synchronously. When the second driving assembly 143 drives the second transmission member 137 to move, it can automatically adjust the different states of the movement of at least three second transmission members 137 to avoid the problems of jamming and poor adjustment.

[0073] The following is a detailed description using the example that the number of the second transmission members 137 is three. Figure 7 and Fig.10 The central axes of the three second transmission members 137 are connected in sequence to form a regular triangle shape.

[0074] The first case: when the three second driving components 143 drive the three second transmission members 137 to move synchronously in a one-to-one correspondence and the speed of movement and the height position after movement are the same, the first adjustment mechanism 130 drives the fixing seat 110 to move parallel to the first axis 101 relative to the second adjustment mechanism 140, that is, the height position of the projection device 160 is adjusted. During the adjustment process, the second driving member 1431 drives the screw rod 1433 to rotate, and the nut 1373 moves along the axial direction of the screw rod 1433, and no relative movement occurs between the nut 1373 and the outer ring 1371.

[0075] The second case: Figure 7 From a viewing angle, when the movement speed and the height position after movement of the two second transmission members 137 located below are the same, but the movement speed and the height position after movement are different from the second transmission member 137 located above, the first adjustment mechanism 130 drives the fixed seat 110 to pitch relative to the second adjustment mechanism 140 around the line connecting the central axes of the two second transmission members 137 located below, so that the first adjustment mechanism 130 drives the fixed seat 110 to tilt relative to the second adjustment mechanism 140.

[0076] Similarly, when only two of the three second transmission members 137 have the same height position after movement, the first adjustment mechanism 130 can drive the fixed seat 110 to perform pitch movement relative to the second adjustment mechanism 140 around the line connecting the central axes of the two second transmission members 137 with the same height position.

[0077] The third situation: when the height positions of the three second transmission members 137 after movement are all different, the three points form a plane, and the first adjustment mechanism 130 can be arbitrarily adjusted to drive the fixed seat 110 to pitch at different angles relative to the second adjustment mechanism 140.

[0078] With respect to the second and third cases, the first adjustment mechanism 130 is tilted relative to the second adjustment mechanism 140, and since the nut 1373 is rotatably connected to the screw rod 1433, the screw rod 1433 is vertically connected to the second adjustment seat 141. In this case, on the one hand, the outer ring 1371 will rotate an angle relative to the nut 1373 around the second sliding shaft 1377, and after the rotation, the angle between the outer ring 1371 and the nut 1373 is equal to the angle between the first adjustment seat 131 and the second adjustment seat 141. On the other hand, the outer ring 1371 will slide a distance along the sliding hole of the fixing part 1379 along with the first sliding shaft 1375, and after the movement, the outer ring 1371 is located directly above the screw 1433. The outer ring 1371 compensates for the offset along the horizontal plane caused by the inclination of the first adjustment seat 131 relative to the second adjustment seat 141 through the sliding of the first sliding shaft 1375, so that the screw 1433 will not get stuck when driving the nut 1373 to transmit, thereby avoiding interference problems during linkage adjustment.

[0079] For further information, please refer to Fig. 9 In the first case, in order to make the second transmission member 137 automatically centered under the driving action of the second driving assembly 143, the outer ring 1371 and the nut 1373 are provided with elastic members on both the first sliding shaft 1375 and the second sliding shaft 1377. The elastic member sleeved on the first sliding shaft 1375 is located on the side of the fixing member 1379 away from the outer ring 1371, and the elastic member sleeved on the second sliding shaft 1377 is compressed between the protrusions at the ends of the outer ring 1371 and the second sliding shaft 1377, so as to achieve the purpose of keeping the nut 1373 centered and preventing it from sliding randomly when the first adjustment mechanism 130 and the fixing seat 110 are parallel to the second adjustment mechanism 140.

[0080] Optionally, the first adjustment seat 131 and the second adjustment seat 141 may both be box-shaped structures (eg Fig.10 ), the first driving assembly 133, the combined bearing 1335 and the second transmission member 137 can all be embedded in the box body of the first adjustment seat 131. The second driving member 1431 in the second driving assembly 143 can be embedded in the box body of the second adjustment seat 141, and the screw 1433 is perpendicular to the second adjustment seat 141 and is in transmission connection with the second transmission member 137. The number of transmission mechanisms is reduced, and the overall volume is reduced.

[0081] The projection device position adjustment bracket 100 adopts a three-layer structural design of a fixed seat 110, a first adjustment mechanism 130 and a second adjustment mechanism 140, which can realize height adjustment along the first axis 101, angle adjustment around the first axis 101, pitch adjustment around the second axis 103 and pitch adjustment around the third axis 105. The adjustment is precise, the volume is small, and it is conducive to the development trend of thin and light products. Through the structural design of the second transmission member 137, it can be ensured that when the nut 1373 is in transmission cooperation with the screw 1433, the deflection and slippage of the outer ring 1371 on the first adjustment seat 131 are small, and the structure is simple; in addition, by integrating the driving member, the overall volume is further reduced.

[0082] Furthermore, the projection device position adjustment bracket 100 provided in the embodiment of the present application can be controlled by brushless DC PWM (Pulse Width Modulation) to achieve closed-loop control. Pulse width modulation technology is an analog control method that modulates the bias of the transistor base or the MOS tube gate according to the change of the corresponding load to achieve the change of the transistor or MOS tube conduction time, thereby achieving the change of the output of the switching regulated power supply. This method can keep the output voltage of the power supply constant when the working conditions change, and is a very effective technology for controlling analog circuits using digital signals of a microprocessor.

[0083] As another implementation, optionally, please refer to Fig.11 The projection device position adjustment bracket 100 may further include a third adjustment mechanism 150. The third adjustment mechanism 150 is connected to a side of the second adjustment mechanism 140 that is away from the first adjustment mechanism 130. The third adjustment mechanism 150 is used to drive the second adjustment mechanism 140, the first adjustment mechanism 130, the fixing seat 110 and the projection device 160 to move along the second axis 103 or the third axis 105 on the desktop, that is, to achieve the function of overall walking.

[0084] For details, please refer to Fig.12 and Fig.13 The third adjustment mechanism 150 includes a driving wheel assembly 155, which can drive the second adjustment mechanism 140, the second adjustment mechanism 140 drives the first adjustment mechanism 130, and then the first adjustment mechanism 130 drives the fixing seat 110 to move linearly along the extension direction of the second axis 103.

[0085] Specifically, the third adjustment mechanism 150 further includes a third adjustment seat 151 and a support wheel 153. The third adjustment seat 151 is arranged on the side of the second adjustment mechanism 140 away from the first adjustment mechanism 130. The third adjustment seat 151 is a plate-like structure, and the third adjustment seat 151 is provided with a through hole 1510. The support wheel 153 is rotatably connected to the side of the third adjustment seat 151 away from the second adjustment mechanism 140. The number of the support wheels 153 is multiple, and the multiple support wheels 153 are located in the circumference of the third adjustment seat 151. The driving wheel assembly 155 is connected to the side of the third adjustment seat 151 close to the second adjustment mechanism 140, and the driving wheel assembly 155 can pass through the through hole 1510 of the third adjustment seat 151 and contact the desktop or work surface. When the driving wheel assembly 155 is working, the driving wheel assembly 155 can drive the adjustment bracket as a whole to move along the desktop or work surface.

[0086] Further, the driving wheel assembly 155 may include a third driving member 1551 and a driving wheel 1553 which are in transmission connection. The third driving member 1551 is connected to the third adjustment seat 151, the driving wheel 1553 is penetrated through the penetration hole 1510 and its bottom surface is located on the same plane as the bottom surface of the supporting wheel 153, and the third driving member 1551 drives the driving wheel 1553 to rotate to drive the projection device position adjustment bracket 100 to move linearly in a certain direction.

[0087] Optionally, the support wheel 153 may be a universal wheel to support rolling. The third driving member 1551 is used to drive the driving wheel 1553 to rotate, and the third driving member 1551 can be forward and reverse. When the projection device position adjustment bracket 100 is set on the desktop, under the action of gravity, the driving wheel 1553 contacts the desktop and has a certain friction force. The third driving member 1551 can make the driving wheel 1553 move forward and backward in a certain direction along the desktop.

[0088] In order to enable the projection device position adjustment bracket 100 to have a steering function when it moves linearly on the desktop, optionally, the third adjustment mechanism 150 can also include a steering wheel assembly 157 arranged on the third adjustment seat 151, and the steering wheel assembly 157 is transmission-connected to the driving wheel assembly 155 to enable the driving wheel assembly 155 to steer around the first axis 101.

[0089] Specifically, the steering wheel assembly 157 includes a fourth driving member 1571, a worm wheel 1573 and a worm 1575. The power output shaft of the fourth driving member 1571 is in transmission connection with the worm 1575, and the worm 1575 is in transmission connection with the worm wheel 1573. Under the driving force of the fourth driving member 1571, the rotation of the worm 1575 can be converted into the rotation of the worm wheel 1573, and the rotation direction of the worm 1575 is converted into the rotation direction of the worm wheel 1573 which is perpendicular to each other.

[0090] During operation, the driving wheel assembly 155 is fixedly connected to the worm gear 1573, and the driving wheel assembly 155 can rotate synchronously with the worm gear 1573, so that the driving wheel assembly 155 can turn around the first axis 101. The fourth driving member 1571 can drive the worm gear 1573 to rotate forward and reversely through the worm 1575, and the rotation angle can reach a range of 360 degrees. When the adjustment bracket needs to move along the direction of the second axis 103, the fourth driving member 1571 drives the worm gear 1573 to rotate through the worm 1575, so that the radial direction of the driving wheel 1553 in the driving wheel assembly 155 is parallel to the second axis 103, and the third driving member 1551 drives the driving wheel 1553 to move forward and backward in a straight line along the direction of the second axis 103. When the adjustment bracket needs to move along the direction of the third axis 105, the fourth driving member 1571 drives the worm wheel 1573 to rotate 90 degrees through the worm 1575, and the worm wheel 1573 drives the driving wheel assembly 155 to rotate 90 degrees as a whole, so that the radial direction of the driving wheel 1553 in the driving wheel assembly 155 is parallel to the third axis 105. Then, the third driving member 1551 drives the driving wheel 1553 to move linearly forward and backward along the direction of the third axis 105.

[0091] In other words, the third adjustment mechanism 150 drives the adjustment bracket as a whole to achieve front and back straight line position adjustment relative to the desktop or workbench within a certain range through the driving wheel assembly 155; and drives the adjustment bracket as a whole to turn relative to the desktop or workbench within a certain range through the steering wheel assembly 157, thereby achieving walking at any angle such as front and back, left and right, so that the projection image of the projection device 160 can match the projection screen position more ideally.

[0092] It is understandable that in order to avoid interference between the second adjustment seat 141 and the driving wheel assembly 155 or the steering wheel assembly 157, and to reduce the volume of the overall structure, the driving wheel assembly 155 and the steering wheel assembly 157 can be installed on the third adjustment seat 151. Optionally, the second adjustment seat 141 is provided with a clearance hole 1410 that matches the driving wheel assembly 155 and the steering wheel assembly 157, so that the driving wheel assembly 155 and the steering wheel assembly 157 can pass through the clearance hole 1410 without interfering with the second adjustment seat 141, thereby reducing the height of the overall structure and also reducing the weight of the overall structure.

[0093] The projection device position adjustment bracket 100 provided in the embodiment of the present application has a compact structure and a small size because the driving wheel assembly 155 and the steering wheel assembly 157 are both embedded in the space formed between the third adjustment seat 151 and the second adjustment seat 141. At the same time, due to the three-layer structural design of the fixed seat 110, the first adjustment mechanism 130 and the second adjustment mechanism 140, the projection device 160 can be adjusted in height along the first axis 101, the angle adjustment around the first axis 101, the pitch adjustment around the second axis 103, the pitch adjustment around the third axis 105, the position adjustment along the second axis 103 and the position adjustment along the third axis 105. The overall solution is not only lightweight, but also can achieve multi-directional intelligent adjustment, and is suitable for home laser projectors.

[0094] The projection device position adjustment bracket 100 provided in the embodiment of the present application can realize intelligent four-axis or six-axis displacement and angle adjustment, which is conducive to adjusting the projection image of the projection device 160 and the projection screen more ideally, has a compact structure, and can accurately adjust the position or angle, further improving the adjustment efficiency.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A projection device position adjustment bracket, characterized in that: include: A fixing seat, used for carrying and fixing the projection device, wherein a first transmission member is fixedly connected to a side of the fixing seat facing away from the projection device; A first adjusting mechanism, wherein the first adjusting mechanism is arranged on a side of the fixed seat close to the first transmission member, the first adjusting mechanism comprises a first adjusting seat, a first driving assembly arranged on the first adjusting seat, and at least three second transmission members, the at least three second transmission members are not located on the same straight line, the second transmission member comprises an outer ring, a nut, a first sliding shaft and a second sliding shaft, the nut is rotatably embedded in the outer ring, the first sliding shaft is connected to both sides of the outer ring in a radial direction and is slidably connected to the first adjusting seat, the second sliding shaft is radially penetrated through the outer ring and is rotatably connected to the nut, the first sliding shaft and the second sliding shaft have an angle, the first driving assembly is transmission-connected to the first transmission member to drive the fixed seat to rotate around the first axis; as well as a second adjustment mechanism, the second adjustment mechanism is arranged on a side of the first adjustment mechanism away from the fixed seat, the second adjustment mechanism includes a second adjustment seat and a second drive assembly arranged on the second adjustment seat, the second drive assembly is equal in number to the second transmission member and corresponds one to one, the second drive assembly includes a second drive member and a screw rod drivingly connected to the second drive member, the screw rod is connected to the second adjustment seat along the extension direction of the first axis and is threadedly connected to the nut, the second drive assembly is drivingly connected to the second transmission member, the second transmission member drives the first adjustment seat, and the first adjustment seat drives the fixed seat to move up and down or pitch; When the movement heights of the nuts in all the second transmission members are equal, the first adjustment mechanism can drive the fixing seat to rise and fall relative to the second adjustment mechanism along the extension direction of the first axis; When the movement heights of the nuts in all the second transmission members are not equal, the first adjustment mechanism can drive the fixed seat to pitch relative to the second adjustment mechanism around a second axis that has an angle with the first axis, or to pitch around a third axis that has an angle with both the first axis and the second axis.

2. The projection device position adjustment bracket according to claim 1, characterized in that: The second transmission member further includes a fixing member, the fixing member is fixedly connected to the first adjustment seat, the fixing member is provided with a sliding hole, and the first sliding shaft is slidably arranged in the sliding hole.

3. The projection device position adjustment bracket according to claim 1, characterized in that: The first driving assembly includes a first driving member and a first gear transmission-connected to the first driving member, the first transmission member includes a rotating shaft and a second gear, the rotating shaft is fixedly connected to the fixed seat, the second gear is key-connected to the rotating shaft and meshes with the first gear for transmission, and the first driving member drives the fixed seat to swing around the first axis through the first transmission member.

4. The projection device position adjustment bracket according to claim 3, characterized in that: The first driving assembly further comprises a combined bearing, the combined bearing is fixedly connected to the first adjusting seat, and one end of the rotating shaft away from the fixing seat is rotatably arranged through the combined bearing.

5. The projection device position adjustment bracket according to claim 1, characterized in that: It also includes a third adjusting mechanism, which is arranged on a side of the second adjusting mechanism away from the first adjusting mechanism. The third adjusting mechanism includes a driving wheel assembly, the driving wheel assembly drives the second adjusting mechanism, the second adjusting mechanism drives the first adjusting mechanism, and the first adjusting mechanism drives the fixed seat to move linearly along the extension direction of the second axis that has an angle with the first axis.

6. The projection device position adjustment bracket according to claim 5, characterized in that: The third adjustment mechanism also includes a third adjustment seat and a support wheel. The third adjustment seat is arranged on a side of the second adjustment mechanism that is away from the first adjustment mechanism. The driving wheel assembly is connected to a side of the third adjustment seat that is close to the second adjustment mechanism. The support wheel is rotatably connected to the circumference of the side of the third adjustment seat that is away from the second adjustment mechanism.

7. The projection device position adjustment bracket according to claim 6, characterized in that: The third adjustment seat is provided with a through hole, and the driving wheel assembly includes a third driving member and a driving wheel which are transmission-connected, the third driving member is connected to the third adjustment seat, the driving wheel is passed through the through hole, and is located on the same plane as the supporting wheel, and the third driving member drives the projection device position adjustment bracket to move linearly via the driving wheel.

8. The projection device position adjustment bracket according to claim 5, characterized in that: The third adjustment mechanism also includes a steering wheel assembly, which is transmission-connected to the driving wheel assembly so as to enable the driving wheel assembly to steer around the first axis.

9. The projection device position adjustment bracket according to claim 8, characterized in that: The steering wheel assembly includes a fourth driving member, a worm wheel and a worm, the fourth driving member is connected to the worm, the worm is drivingly connected to the worm wheel, and the driving wheel assembly is fixedly connected to the worm wheel and rotates synchronously with the worm wheel.

10. The projection device position adjustment bracket according to any one of claims 1 to 9, characterized in that: An opening and closing clamp is provided on a side of the fixed seat facing away from the first transmission member, and the opening and closing clamp includes a first clamping mechanism and a second clamping mechanism, the first clamping mechanism is relatively arranged along a first direction and is slidably connected to the fixed seat, the second clamping mechanism is relatively arranged along a second direction having an angle with the first direction and is slidably connected to the fixed seat, and the first clamping mechanism and the second clamping mechanism enclose an installation area for fixing the projection device.

11. The projection device position adjustment bracket according to claim 10, characterized in that: The first clamping mechanism includes a stopper and a first elastic member. The fixing seat is provided with a sliding portion along the first direction. The stopper is slidably connected to the sliding portion. The first elastic member is installed on a side of the stopper away from the installation area.

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