A projector direction-changing mechanism and projector

Abstract

The present invention relates to the field of projector technology, and specifically to a projector direction-changing mechanism and a projector, wherein the projector direction-changing mechanism includes a hoisting adjustment component and a positioning support component; the hoisting adjustment component includes a hoisting mounting frame, a hoisting adjustment platform installed at the bottom of the hoisting mounting frame, and a mobile mounting platform installed on the hoisting adjustment platform; the mobile mounting platform is slidably installed on the lower surface of the hoisting adjustment platform; the positioning support component includes a fixed seat, a middle bracket and a loading bracket installed on the fixed seat, the fixed seat is fixedly installed on the mobile mounting platform, a projector mounting frame is slidably installed on the loading bracket, and the loading bracket is arranged on the middle bracket and rotates with the middle bracket as the axis. The present invention makes precise adjustments to the installation of the projector itself, performs initial projection positioning, and can subsequently perform corresponding size adjustments according to different projection requirements, and resets to the initialization position after the projection is completed.

Description

Technical Field

[0001] The invention relates to the technical field of projectors, in particular to a projector direction-changing mechanism and a projector. Background Art

[0002] A projector, also known as a projector, is a device that can project images or videos onto a screen. It can be connected to computers, VCDs, DVDs, BDs, game consoles, DVs, etc. through different interfaces to play corresponding video signals. Projectors are widely used in homes, offices, schools, and entertainment venues. There are different types of projectors, such as CRT, LCD, and DLP, depending on the working mode. Existing projectors are generally difficult to flexibly adjust the angle and direction of the projection. When adjusting, the entire machine usually needs to be moved, which makes it difficult to accurately adjust the angle and is inconvenient to use on inclined walls.

[0003] The projector changing mechanism in the prior art generally includes a base, an upper shell is connected to the top of the base, an arc groove is arranged on the front of the upper shell, a projector body is arranged in the arc groove, an outer frame is connected to the outside of the projector body, and a changing mechanism is arranged under the outer frame; however, this structure is inconvenient to adjust the projection direction according to needs, resulting in that it is difficult to achieve an ideal projection effect. Summary of the invention

[0004] The object of the present invention is to provide a projector direction changing mechanism and a projector to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A projector direction-changing mechanism comprises a hanging adjustment component and a positioning support component; the hanging adjustment component comprises a hanging mounting frame, a hanging adjustment platform installed at the bottom of the hanging mounting frame, and a movable mounting platform installed on the hanging adjustment platform; a limiting component is arranged on the side edge of the hanging mounting frame, and the hanging adjustment platform is swingably mounted on the hanging mounting frame through the limiting component; the movable mounting platform is slidably mounted on the lower surface of the hanging adjustment platform; the positioning support component comprises a fixed seat and a middle bracket installed on the fixed seat, a loading bracket is installed on the middle bracket, the fixed seat is fixedly installed on the movable mounting platform, a projector mounting frame is slidably mounted on the loading bracket, and the loading bracket is arranged on the middle bracket and rotates with the middle bracket as the axis.

[0007] As a further solution of the present invention: the hanging installation frame includes a ceiling bracket and a supporting base frame installed on the ceiling bracket, the hanging adjustment platform includes an adjustment platform substrate, substrate end frames arranged at both ends of the adjustment platform substrate, and a supporting slide rod installed between the substrate end frames, the adjustment platform substrate is mounted in the frame body of the supporting base frame, the mobile installation platform includes an installation main board and a sliding sleeve installed on the top of the installation main board, and the sliding sleeve is slidably installed on the supporting slide rod.

[0008] As a further solution of the present invention: a base frame fixing plate is provided at the bottom of the supporting base frame, a flip shaft is mounted on the base frame fixing plate, and the top of the plate surface of the adjusting platform substrate is installed on the flip shaft through a flip mounting plate.

[0009] As a further solution of the present invention: the end of the adjustment platform substrate is installed with an end frame support plate, and a flip support block is arranged on the end frame support plate. The limit assembly includes a limit block, a limit side plate arranged on the side edge of the limit block, and an arc track opened on the limit side plate. The limit block is fixedly installed on the side of the frame of the ceiling bracket, and a photosensitive slider is arranged on the flip support block, and the photosensitive slider is slidably installed in the arc track; an arc-shaped photosensitive scale is arranged on the track side of the arc track, and the photosensitive slider is connected to the arc-shaped photosensitive scale by optical signals.

[0010] As a further solution of the present invention: a driving shaft and a driven shaft are respectively provided at both ends of the plate surface of the adjustment platform substrate, a driving wheel and a driven wheel are respectively installed on the driving shaft and the driving wheel, a displacement toothed belt is connected between the driving wheel and the driven wheel, a displacement device is installed on the belt surface of the displacement toothed belt, and the displacement device is fixedly installed on the plate body on which the main board is installed.

[0011] As a further solution of the present invention: a first photosensitive spotlight and a second photosensitive spotlight are also installed at the midline position of the plate surface of the adjustment platform substrate, and the first photosensitive spotlight, the displacement device and the second photosensitive spotlight form an optical signal connection.

[0012] As a further solution of the present invention: the middle bracket includes a middle support rod and a support assembly plate installed at the bottom end of the middle support rod, the loading bracket includes an outer wing mounting frame and a transverse bracket installed at the bottom end of the outer wing mounting frame, the outer wing mounting frame is bent in an "L" shape, the main body of the transverse bracket is a track frame, the inner edge of the track frame is provided with an inner frame slide rail, and a plurality of adjustment blocks are provided on the inner frame slide rail, the outer wing mounting frame is installed on the middle support rod through a steering cylinder, and the projector mounting frame is installed on the adjustment block.

[0013] As a further solution of the present invention: a mounting frame support head is installed at the rod end of the outer wing mounting frame, an inner frame solid block is provided on the frame body of the track frame, an inner connecting block is installed on the inner frame solid block, a flip inner supporting block is provided on the mounting frame support head, and the inner connecting block is foldably installed on the flip inner supporting block through a flip bolt.

[0014] As a further solution of the present invention: the middle support rod is a telescopic structure and is passed outside between the frames of the track frame. The support assembly plate includes a fixed end, a fixed plate fixed on the fixed end, and an adjusting plate mounted on the fixed plate. A plurality of leveling bolts are arranged between the adjusting plate and the fixed plate.

[0015] The invention also discloses a projector installed on the projector direction-changing mechanism.

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

[0017] 1. The positioning support assembly is used to perform initial adjustment on the installation position and working angle of the projector, and is used to perform adjustment and positioning during the projection preparation stage, so that the loading bracket rotates relative to the middle bracket, and the lateral swinging position of the projector is adjusted. The projector mounting frame can slide along the loading bracket, thereby adjusting the installation position of the projector, so that the projector lens is in a suitable coordinate position relative to the projection screen. After the adjustment is completed, they are all locked and fixed, so that the loading bracket, the projector mounting frame and the projector are fixed as a stable whole. The installation of the projector itself can be precisely adjusted, and the initial projection positioning can be performed to meet conventional projection needs.

[0018] 2. The hoisting adjustment component is used to adjust the projector during operation to cope with changes in the projection process or adjust the projection direction according to needs. The hoisting adjustment platform flips along the limit track of the limit component to adjust the swing angle of the hoisting adjustment platform, and then adjusts the projection angle of the projector as a whole. The mobile installation platform can slide along the hoisting adjustment platform to adjust the distance between the projector and the projection screen. In this way, the corresponding size adjustment can be made according to different projection requirements; and the above adjustment range can be recorded and reset to the initialization position after the projection is completed.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into and constitute a part of the specification to illustrate embodiments consistent with the present application and are used together with the specification to explain the principles of the present application. At the same time, these drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application for those skilled in the art by referring to specific embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure of a projector direction-changing mechanism provided in an embodiment of the present invention.

[0022] Figure 2 A schematic structural diagram of a fixing base and a loading bracket provided in an embodiment of the present invention.

[0023] Figure 3 For the present invention Figure 2 Schematic diagram of the structure of area B.

[0024] Figure 4 For the present invention Figure 2 Schematic diagram of the structure of region D in the middle.

[0025] Figure 5 A schematic diagram of the structure of a hoisting adjustment platform and a mobile installation platform provided in an embodiment of the present invention.

[0026] Figure 6 For the present invention Figure 5 Schematic diagram of the structure of the middle C region.

[0027] Figure 7 For the present invention Figure 5 Schematic diagram of the structure of area A in the middle.

[0028] Figure 8 A schematic top view of a hoisting adjustment platform provided in an embodiment of the present invention.

[0029] In the figure: 11, hoisting installation frame; 12, hoisting adjustment platform; 13, mobile installation platform; 14, limit assembly; 21, fixed seat; 22, loading bracket; 23, projector installation frame; 24, middle bracket; 31, ceiling bracket; 32, support base frame; 33, adjustment platform substrate; 34, substrate end frame; 35, support slide bar; 36, installation main board; 37, sliding sleeve; 41, base frame fixing plate; 42, flip shaft; 43, flip installation plate; 52, end frame support plate; 53, flip support block; 54, limit block; 55, limit side plate; 56, light sensing slider; 57, arc track; 58, arc photosensitive Ruler; 61, driving shaft; 62, driving wheel; 63, driven shaft; 64, driven wheel; 65, displacement toothed belt; 66, displacement device; 67, first photosensitive spotlight; 68, second photosensitive spotlight; 69, driving motor; 71, middle support rod; 72, support assembly plate; 73, outer wing mounting frame; 74, transverse support; 75, track frame; 76, inner frame slide rail; 77, adjustment block; 78, steering cylinder; 81, mounting frame support head; 82, frame inner solid block; 83, inner connection block; 84, flip bolt; 85, flip inner support block; 91, fixed end; 92, fixed plate; 93, adjustment plate; 94, leveling bolt. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0031] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0033] In one embodiment, see Figure 1, provides a projector changing mechanism, including a hanging adjustment component and a positioning support component; the hanging adjustment component includes a hanging mounting frame 11, a hanging adjustment platform 12 installed at the bottom of the hanging mounting frame 11 and a movable mounting platform 13 installed on the hanging adjustment platform 12; a limit component 14 is arranged on the side edge of the hanging mounting frame 11, and the hanging adjustment platform 12 is swingably mounted on the hanging mounting frame 11 through the limit component 14; the movable mounting platform 13 is slidably mounted on the lower surface of the hanging adjustment platform 12; the positioning support component includes a fixed seat 21 and a middle bracket 24 installed on the fixed seat 21, a loading bracket 22 is installed on the middle bracket 24, the fixed seat 21 is fixedly installed on the movable mounting platform 13, a projector mounting frame 23 is slidably mounted on the loading bracket 22, and the loading bracket 22 is arranged on the middle bracket 24 and rotates with the middle bracket 24 as the axis.

[0034] This embodiment is used for the installation of the projector. The projector is installed in the projector installation frame 23. The hanging installation frame 11 is the supporting structure for hanging. In this embodiment, the positioning support assembly is used to perform initial adjustment on the installation position and working angle of the projector, and is used to perform adjustment and positioning in the projection preparation stage, so that the loading bracket 22 rotates relative to the middle bracket 24 to adjust the lateral swinging direction of the projector, and the projector installation frame 23 can slide along the loading bracket 22, thereby adjusting the installation position of the projector, so that the lens of the projector is in a suitable coordinate position relative to the projection screen. After the adjustment is completed, they are all locked and fixed, so that the loading bracket 22, the projector installation frame 23 and the projector are fixed as a stable whole. The installation of the projector itself is precisely adjusted, and the initial projection positioning is performed to meet the conventional projection needs.

[0035] The hoisting adjustment component is used for adjustment during the operation of the projector to cope with changes in the projection implementation process, or to adjust the projection direction according to needs. The hoisting adjustment platform 12 flips along the limit track of the limit component 14, thereby adjusting the swing angle of the hoisting adjustment platform 12, and then adjusting the projection angle of the projector as a whole. The mobile installation platform 13 can slide along the hoisting adjustment platform 12 to adjust the distance between the projector and the projection screen. Therefore, the corresponding size adjustment can be performed according to different projection requirements; and the above adjustment range can be recorded and reset to the initialization position after the projection is completed.

[0036] In one embodiment, based on the contents described in the above embodiment, please refer to Figure 2 , with regard to the specific implementation structure of the loading bracket 22 and the projector mounting frame 23, this embodiment is designed as follows:

[0037] The middle bracket 24 includes a middle support rod 71 and a support assembly plate 72 installed at the bottom end of the middle support rod 71, and the loading bracket 22 includes an outer wing mounting frame 73 and a transverse bracket 74 installed at the bottom end of the outer wing mounting frame 73. The outer wing mounting frame 73 is bent in an "L" shape, and the main body of the transverse bracket 74 is a track frame 75. The inner edge of the track frame 75 is provided with an inner frame slide rail 76, and a plurality of adjustment blocks 77 are provided on the inner frame slide rail 76. The outer wing mounting frame 73 is installed on the middle support rod 71 through a steering cylinder 78.

[0038] The middle support rod 71 is a hoisting support structure of the projector mounting frame 23, which is used to hoist the projector. The outer wing mounting frame 73 rotates relative to the middle support rod 71 through the steering cylinder 78, thereby adjusting the lens orientation of the projector. The main body of the transverse bracket 74 is a track frame 75, and the adjustment block 77 is slidably installed in the inner frame slide rail 76 on the inner edge of the track frame 75. The position of each adjustment block 77 can be adjusted. The top of the projector mounting frame 23 is hoisted and installed on the adjustment block 77. Each adjustment block 77 is a top hoisting point of the projector mounting frame 23, thereby adjusting the installation position of the projector.

[0039] In one case of this embodiment, see Figure 2 and Figure 3 , this embodiment can also adjust the installation angle of the track frame 75:

[0040] A mounting frame support head 81 is installed at the rod end of the outer wing mounting frame 73, and a frame inner solid block 82 is provided on the frame body of the track frame 75, and an inner connecting block 83 is installed on the frame inner solid block 82. A flip inner supporting block 85 is provided on the mounting frame support head 81, and the inner connecting block 83 is foldably installed on the flip inner supporting block 85 through a flip bolt 84; when adjusting, the inner connecting block 83 is folded relative to the flip inner supporting block 85 with the flip bolt 84 as the folding point, so that the entire track frame 75 is folded relative to the outer wing mounting frame 73, and then the hoisting implementation angle of the track frame 75 is slightly adjusted, and then the projection operation angle of the projector is fine-tuned.

[0041] In one case of this embodiment, see Figure 2 and Figure 4 The middle support rod 71 is a telescopic structure and is passed through the frame of the track frame 75. The support assembly plate 72 includes a fixed end 91, a fixed plate 92 fixed on the fixed end 91, and an adjusting plate 93 mounted on the fixed plate 92. A plurality of leveling bolts 94 are arranged between the adjusting plate 93 and the fixed plate 92.

[0042] The middle support rod 71 is a telescopic structure, so as to adjust the height position of the support plate assembly 72, so that the support plate assembly 72 is supported on the bottom of the horizontal bracket 74, forming an upward supporting force to maintain stability. At the same time, when the track frame 75 is fine-tuned and a small tilt occurs, the support plate assembly 72 can also be adjusted accordingly. The main body of the support plate assembly 72 includes a fixed plate 92 and an adjustment plate 93. At this time, the leveling bolt 94 between the adjustment plate 93 and the fixed plate 92 is turned to make the top adjustment plate 93 tilt slightly, so that the tilting trend of the adjustment plate 93 is the same as that of the track frame 75, and the adjustment plate 93 is kept in contact with the bottom of the track frame 75, thereby ensuring the stability of the support.

[0043] In one embodiment, based on the contents described in the above embodiment, please refer to Figure 5 and Figure 6 For the specific implementation structure of the hoisting installation frame 11, the hoisting adjustment platform 12 and the mobile installation platform 13, this embodiment is designed as follows:

[0044] The hanging installation frame 11 includes a ceiling bracket 31 and a support base frame 32 installed on the ceiling bracket 31. The hanging adjustment platform 12 includes an adjustment platform substrate 33, substrate end frames 34 arranged at both ends of the adjustment platform substrate 33, and a support slide bar 35 installed between the substrate end frames 34. The adjustment platform substrate 33 is mounted in the frame of the support base frame 32. The mobile installation platform 13 includes a mounting main board 36 and a sliding sleeve 37 installed on the top of the mounting main board 36. The sliding sleeve 37 is slidably mounted on the support slide bar 35, and the fixed seat 21 is fixedly mounted on the mounting main board 36. A base frame fixing plate 41 is provided at the bottom of the support base frame 32, and a flip shaft 42 is mounted on the base frame fixing plate 41. The top of the plate surface of the adjustment platform substrate 33 is mounted on the flip shaft 42 through the flip mounting plate 43.

[0045] During operation, the flip shaft 42 is externally connected to an adjusting motor, and the flip shaft 42 is used as a power driving tool to drive the flip mounting plate 43 to rotate relative to the base frame fixing plate 41, thereby driving the adjusting platform substrate 33 to rotate, so as to adjust the real-time angle of the adjusting platform substrate 33, and then adjust the projection angle of the projector as a whole. The mounting main board 36 can slide along the track of the supporting slide rod 35, so as to adjust the distance between the projector and the projection screen.

[0046] In one case of this embodiment, see Figure 5 and Figure 7 Regarding the specific implementation structure of the limit assembly 14, this embodiment is designed as follows:

[0047] The end of the adjustment platform substrate 33 is installed with an end frame support plate 52, and a flip support block 53 is arranged on the end frame support plate 52. The limit assembly 14 includes a limit block 54, a limit side plate 55 arranged on the side edge of the limit block 54, and an arc track 57 opened on the limit side plate 55. The limit block 54 is fixedly installed on the side of the frame of the ceiling bracket 31. The flip support block 53 is provided with a light-sensitive slider 56, and the light-sensitive slider 56 is slidably installed in the arc track 57. The track side of the arc track 57 is provided with an arc photosensitive scale 58, and the light-sensitive slider 56 and the arc photosensitive scale 58 are connected with each other in an optical signal.

[0048] A flip support block 53 is installed at the tail end of the adjustment platform substrate 33, and the flip support block 53 is limited in the arc track 57 by the light-sensitive slider 56, thereby limiting the movement trajectory of the adjustment platform substrate 33 during angle adjustment; when the light-sensitive slider 56 moves along the track of the arc track 57, it itself is a light signal source, and the arc-shaped photosensitive scale 58 can sense and record the movement trajectory of the light-sensitive slider 56 as a light signal, thereby recording the final adjustment flip angle spacing of the adjustment platform substrate 33, so that after the projection is completed, the adjustment platform substrate 33 can be reset to the initial position.

[0049] In one case of this embodiment, see Figure 5 and Figure 8 , as for the specific adjustment implementation structure of the mounting main board 36, the present embodiment is designed as follows: the driving shaft 61 and the driven shaft 63 are respectively provided at both ends of the plate surface of the adjustment platform substrate 33, and the driving shaft 61 and the driving wheel 62 are respectively provided with the driving wheel 62 and the driven wheel 64, and a displacement toothed belt 65 is connected between the driving wheel 62 and the driven wheel 64, and a displacement device 66 is installed on the belt surface of the displacement toothed belt 65, and the displacement device 66 is fixedly installed on the plate body of the mounting main board 36. The first photosensitive spotlight 67 and the second photosensitive spotlight 68 are also installed at the center line position of the plate surface of the adjustment platform substrate 33, and the first photosensitive spotlight 67, the displacement device 66 and the second photosensitive spotlight 68 form an optical signal docking.

[0050] During operation, the driving motor 69 is used as the driving source to drive the driving shaft 61 and the driving wheel 62 installed on the driving shaft 61 to rotate. A displacement toothed belt 65 is connected between the driving wheel 62 and the driven wheel 64, which in turn drives the displacement toothed belt 65 to move. The displacement toothed belt 65 drives the installation main board 36 to move through the displacement device 66, thereby adjusting the position of the installation main board 36 and adjusting the lens coordinates of the projector to adjust the distance between the projector and the projection screen.

[0051] A first photosensitive spotlight 67 and a second photosensitive spotlight 68 are also installed between the driving wheel 62 and the driven wheel 64. The displacement device 66 blocks the light rays from the first photosensitive spotlight 67 and the second photosensitive spotlight 68. When the displacement device 66 is displaced, the movement distance of the displacement device 66 can be accurately known by the change in the ray distance, so that after the projection is completed, the installation main board 36 can be accurately reset to the initial position.

[0052] The invention also discloses a projector installed on the projector direction-changing mechanism.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0054] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A projector direction-changing mechanism, comprising a hoisting adjustment component and a positioning support component; characterized in that: The hoisting adjustment component comprises a hoisting mounting frame (11), a hoisting adjustment platform (12) mounted at the bottom of the hoisting mounting frame (11), and a movable mounting platform (13) mounted on the hoisting adjustment platform (12); a limit assembly (14) is provided on the side edge of the hoisting mounting frame (11), and the hoisting adjustment platform (12) is swingably mounted on the hoisting mounting frame (11) via the limit assembly (14); the movable mounting platform (13) is slidably mounted on the lower surface of the hoisting adjustment platform (12); The positioning support assembly comprises a fixing seat (21) and a middle bracket (24) mounted on the fixing seat (21); a loading bracket (22) is mounted on the middle bracket (24); the fixing seat (21) is fixedly mounted on the mobile mounting platform (13); a projector mounting frame (23) is slidably mounted on the loading bracket (22); the loading bracket (22) is arranged on the middle bracket (24) and rotates around the middle bracket (24) as an axis; The middle bracket (24) comprises a middle support rod (71) and a support assembly plate (72) mounted on the bottom end of the middle support rod (71); the loading bracket (22) comprises an outer wing mounting frame (73) and a transverse bracket (74) mounted on the bottom end of the outer wing mounting frame (73); the outer wing mounting frame (73) is bent in an "L" shape; the main body of the transverse bracket (74) is a track frame (75); an inner frame slide rail (76) is provided on the inner edge of the track frame (75); a plurality of adjustment blocks (77) are provided on the inner frame slide rail (76); the outer wing mounting frame (73) is mounted on the middle support rod (71) through a steering cylinder (78); and the projector mounting frame (23) is mounted on the adjustment block (77); The rod end of the outer wing mounting frame (73) is provided with a mounting frame support head (81), the frame body of the track frame (75) is provided with a frame inner solid block (82), the frame inner solid block (82) is provided with an inner connection block (83), the mounting frame support head (81) is provided with a flip inner support block (85), and the inner connection block (83) is foldably mounted on the flip inner support block (85) via a flip bolt (84); The middle support rod (71) is a telescopic structure and is inserted between the frame bodies of the track frame (75). The support assembly plate (72) comprises a fixed end (91), a fixed plate (92) fixed to the fixed end (91), and an adjustment plate (93) mounted on the fixed plate (92). A plurality of leveling bolts (94) are provided between the adjustment plate (93) and the fixed plate (92).

2. The projector direction changing mechanism according to claim 1, characterized in that: The hanging installation frame (11) comprises a ceiling bracket (31) and a supporting base frame (32) installed on the ceiling bracket (31); the hanging adjustment platform (12) comprises an adjustment platform substrate (33), substrate end frames (34) arranged at both ends of the adjustment platform substrate (33) and a supporting slide bar (35) installed between the substrate end frames (34); the adjustment platform substrate (33) is mounted in a frame body of the supporting base frame (32); the movable installation platform (13) comprises a mounting main board (36) and a sliding sleeve (37) installed on the top of the mounting main board (36); the sliding sleeve (37) is slidably mounted on the supporting slide bar (35).

3. The projector direction changing mechanism according to claim 2, characterized in that: A base frame fixing plate (41) is provided at the bottom of the supporting base frame (32), a flip rotating shaft (42) is mounted on the base frame fixing plate (41), and the top of the plate surface of the adjusting platform base plate (33) is mounted on the flip rotating shaft (42) via a flip mounting plate (43).

4. The projector direction changing mechanism according to claim 3, characterized in that: An end frame support plate (52) is installed at the end of the adjustment platform base plate (33), and a flip support block (53) is arranged on the end frame support plate (52). The limit assembly (14) comprises a limit block (54), a limit side plate (55) arranged on the side edge of the limit block (54), and an arc track (57) opened on the limit side plate (55). The limit block (54) is fixedly installed on the side of the frame of the ceiling bracket (31). A light-sensitive slider (56) is arranged on the flip support block (53), and the light-sensitive slider (56) is slidably installed in the arc track (57); An arc-shaped photosensitive scale (58) is arranged on the track side of the arc-shaped track (57), and the photosensitive slider (56) is connected to the arc-shaped photosensitive scale (58) in the form of a light signal.

5. The projector direction changing mechanism according to claim 4, characterized in that: A driving shaft (61) and a driven shaft (63) are respectively arranged at both ends of the plate surface of the adjustment platform base plate (33); a driving wheel (62) and a driven wheel (64) are respectively mounted on the driving shaft (61) and the driving wheel (62); a displacement toothed belt (65) is connected between the driving wheel (62) and the driven wheel (64); a displacement device (66) is mounted on the belt surface of the displacement toothed belt (65); and the displacement device (66) is fixedly mounted on a plate body on which the main plate (36) is mounted.

6. The projector direction changing mechanism according to claim 5, characterized in that: A first photosensitive spotlight (67) and a second photosensitive spotlight (68) are also installed at the center line of the plate surface of the adjustment platform substrate (33); the first photosensitive spotlight (67), the displacement device (66) and the second photosensitive spotlight (68) form an optical signal connection; the displacement device (66) blocks the light irradiation line of the first photosensitive spotlight (67) and the second photosensitive spotlight (68); when the displacement device (66) is displaced, the movement distance of the displacement device (66) is accurately known by the change in the ray distance.

7. A projector, characterized in that: It comprises a projector direction-changing mechanism as described in any one of claims 1 to 6.

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