CN220320971U - Multimedia projector axle sleeve hanger - Google Patents

Abstract

The application discloses a multimedia projector shaft sleeve hanging bracket, which comprises a projector body and an adjustable hanging bracket, wherein the projector body is arranged on the hanging bracket; when the projector body is adjusted, a worker is suitable for being matched with the lifting support through the rod assembly, so that the projector body is adjusted in all directions, the lifting support comprises a height adjusting support body and an angle adjusting support body, and the angle adjusting support body is respectively suitable for being connected with the projector body and the height adjusting support body; the rod assembly is suitable for being matched with the height adjusting frame body, so that the height of the projector body is adjusted. The beneficial effects of this application: through being provided with the pole subassembly, people can stand indoor subaerial, then hold pole subassembly and hoist and mount support and cooperate, and then can carry out the omnidirectional regulation to the projector body, people just need not ascend a height like this and adjust it, and is more convenient and the security is also good.

Description

Multimedia projector axle sleeve hanger

Technical Field

The application relates to the technical field of projection equipment, in particular to a shaft sleeve hanging bracket of a multimedia projector.

Background

The projector is an optical instrument which uses optical elements to enlarge the outline of a workpiece and projects the outline onto a shadow screen, can use transmitted light for outline measurement, can use reflected light for measuring the surface shape of a non-through hole and observing the surface of a part, and can also be used for projecting images or videos onto a curtain; existing projectors are typically used with hangers mounted at the top of the room.

In the prior art, as in the patent of CN213809606U, a projector mounting device with convenient adjustment is disclosed, and the patent can adjust the height and angle of the projector in various directions; however, this patent suffers from the following disadvantages: because the installation position of the projector is higher, the projector needs to be lifted when the subsequent adjustment is carried out, namely, people need to stand on a ladder or a superposed chair, and then the direction of the projector is adjusted, so that on one hand, the projector is troublesome, and on the other hand, certain danger exists; therefore, a shaft sleeve hanging bracket of a multimedia projector is provided to solve the technical problems.

Disclosure of Invention

One of the objects of the present application is to provide a multimedia projector axle sleeve hanger.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows: the shaft sleeve hanging bracket of the multimedia projector comprises a projector body and an adjustable hanging bracket, wherein the projector body is arranged on the hanging bracket; when the projector body is adjusted, a worker is suitable for being matched with the hoisting support through the rod assembly, and then the projector body is adjusted in all directions.

Preferably, the lifting bracket comprises a height adjusting bracket body and an angle adjusting bracket body, and the angle adjusting bracket body is respectively suitable for being connected with the projector body and the height adjusting bracket body; the rod assembly is suitable for being matched with the height adjusting frame body, so that the height of the projector body is adjusted; the lever assembly is adapted to cooperate with the angle adjustment bracket body to thereby enable the projector body to perform angle adjustment.

Preferably, the height adjusting frame body comprises a hanging shaft, an adjusting rod, a sleeve, a threaded cylinder and a driving device, wherein the bottom end of the adjusting rod is suitable for being connected with the angle adjusting frame body, the top end of the adjusting rod is suitable for being connected with the sleeve through a connecting plate, the adjusting rod is suitable for being in sliding fit with the hanging shaft through a sliding assembly, the threaded cylinder is rotatably installed on the sleeve, the threaded cylinder is sleeved on the hanging shaft through threads, the sleeve is movably sleeved on the hanging shaft, and the driving device is installed on the connecting plate and is suitable for being connected with the threaded cylinder; when the height of the projector body is adjusted, a worker is suitable for acting on the driving device through the rod assembly to drive the threaded cylinder to rotate, so that the adjusting rod moves up and down.

Preferably, the driving device comprises a transmission assembly and a driving assembly, and the transmission assembly is suitable for being in fit connection with the threaded cylinder; when the height of the projector body is adjusted, the driving assembly is suitable for driving the threaded cylinder to rotate through the transmission assembly.

Preferably, the transmission assembly comprises a worm wheel and a worm which are meshed with each other, the worm wheel is mounted on the threaded cylinder, the worm is rotatably mounted on the connecting plate, and the worm is suitable for being connected with the driving assembly; when the height of the projector body is adjusted, the driving assembly is suitable for driving the worm to rotate, so that the worm wheel drives the threaded cylinder to synchronously rotate.

Preferably, the driving assembly comprises two groups of gears and two groups of racks, the two groups of gears are mounted at two ends of the worm through one-way bearings, the racks are vertically and slidably arranged at two sides of the bottom end of the connecting plate, the gears are meshed with the corresponding racks, the two groups of racks are located at different sides relative to the gears, and the racks are suitable for being matched with the rod assembly through a first matching piece.

Preferably, the angle adjusting frame body comprises a ball seat, a ball body, a positioning assembly and a driving structure, wherein the ball body is rotatably installed in the ball seat, the projector body is installed in the ball body, the ball seat is installed at the bottom end of the adjusting rod, the positioning assembly and the driving structure are installed in the ball seat, and the positioning assembly is suitable for locking the ball body; the rod assembly is suitable for unlocking the ball seat by the positioning assembly through the driving structure when the angle of the projector body is adjusted; after the angular adjustment of the projector body is completed, the lever assembly is adapted to pass through the driving structure so that the positioning assembly locks the sphere again.

Preferably, the positioning assembly comprises a plurality of groups of positioning rods, the positioning rods are elastically and slidably arranged on the side parts of the ball seat, the positioning rods are abutted against the ball body to lock the ball body, and the end parts of the positioning rods are matched with the driving structure through connecting sheets; the driving structure is suitable for enabling the locating rod to be far away from the sphere through the connecting sheet so as to enable the sphere to be unlocked.

Preferably, the driving structure comprises a ring body, the ring body is rotatably arranged on the side part of the ball seat, a plurality of inclined blocks are arranged on the side part of the ring body, and the outer part of the ring body is matched with the rod assembly through a second matching piece; when the inclined block and the connecting sheet are misplaced, the positioning component is suitable for locking the sphere; when the inclined block rotates to be in contact with the connecting sheet, the positioning rod is away from the sphere so as to unlock the sphere.

Preferably, two groups of baffles are fixedly arranged on the side part of the ball seat; when the positioning assembly locks the sphere, the second matching piece is propped against one group of baffle plates; when the positioning assembly releases the locking of the sphere, the second matching piece is propped against the other group of baffles.

Compared with the prior art, the beneficial effect of this application lies in:

according to the utility model, by arranging the rod assembly, people can stand on the indoor ground, then hold the rod assembly with hands to be matched with the hoisting bracket, and then the projector body can be adjusted in all directions, so that people do not need to ascend to adjust the projector body, and the projector is convenient and good in safety.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a schematic view of a partial structure of the present utility model.

Fig. 3 is a schematic view of the structure of the height-adjusting frame of the present utility model.

Fig. 4 is an enlarged schematic view of the structure of the present utility model at a.

Fig. 5 is a schematic view of the structure of the angle adjusting frame of the present utility model.

Fig. 6 is a schematic diagram of a driving structure of the present utility model.

FIG. 7 is a schematic cross-sectional view of a tee of the present utility model.

Fig. 8 is an enlarged schematic view of the structure of the present utility model at B.

In the figure: 1. a projector body; 2. hoisting the bracket; 21. a height adjusting frame body; 211. hanging the shaft; 212. a sleeve; 213. a thread cylinder; 214. an adjusting rod; 215. a driving device; 2151. a transmission assembly; 21511. a worm; 21512. a worm wheel; 2152. a drive assembly; 21521. a gear; 21522. a rack; 22. an angle adjusting frame body; 221. a ball seat; 222. a positioning assembly; 2221. a positioning rod; 223. a driving structure; 2231. a ring body; 2232. a sloping block; 224. a sphere; 3. a lever assembly; 4. a connecting plate; 5. a first matching piece; 6. a sliding assembly; 7. a first spring; 8. a slide plate; 9. a second matching piece; 10. a baffle; 11. a rubber layer; 12. a connecting sheet; 13. a second spring; 14. rubber blocks.

Detailed Description

The present application will be further described with reference to the specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

In the description of the present application, it should be noted that, for the azimuth terms such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific protection scope of the present application that the device or element referred to must have a specific azimuth configuration and operation, as indicated or implied.

It should be noted that the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

In one preferred embodiment of the present application, as shown in fig. 1 to 8, a multimedia projector shaft sleeve hanger comprises a projector body 1 and an adjustable lifting support 2, wherein the lifting support 2 can be adjusted in multiple directions in height and angle, the lifting support 2 is installed at the indoor top, and the projector body 1 is installed at the bottom end of the lifting support 2; when we carry out the regulation of projector body 1, people can stand subaerial indoor, then hold pole subassembly 3 and hoist and mount support 2 and cooperate, and then can carry out the omnidirectional regulation to projector body 1, and people just need not ascend a height like this and adjust it, and is more convenient and the security is also good.

In this embodiment, as shown in fig. 1, the lifting bracket 2 includes a height adjustment bracket body 21 and an angle adjustment bracket body 22, and the angle adjustment bracket body 22 is respectively connected with the projector body 1 and the height adjustment bracket body 21; when the lever assembly 3 and the height adjusting frame 21 are matched, the height of the projector body 1 and the angle adjusting frame 22 can be adjusted; when the lever assembly 3 and the angle adjusting frame 22 are used cooperatively, the angle of the projector body 1 can be adjusted in multiple directions.

In this embodiment, as shown in fig. 2 and 3, the height adjusting frame 21 includes a hanging shaft 211, a sleeve 212, a threaded cylinder 213, an adjusting rod 214 and a driving device 215, the angle adjusting frame 22 is installed at the bottom end position of the adjusting rod 214, the top end of the adjusting rod 214 is installed in a connecting way through the connecting plate 4 and the sleeve 212, the threaded cylinder 213 is rotatably installed at the bottom end position of the sleeve 212, the threaded cylinder 213 is sheathed outside the hanging shaft 211 through threads, that is, external threads matched with the threaded cylinder 213 are arranged outside the hanging shaft 211, the sleeve 212 is movably sheathed outside the hanging shaft 211, and the adjusting rod 214 is in sliding fit with the hanging shaft 211 through the sliding component 6; the sliding component 6 comprises a mounting plate, the mounting plate is mounted at the bottom end of the hanging shaft 211, a mounting hole matched with the adjusting rod 214 is formed in the top end of the mounting plate, the adjusting rod 214 just penetrates through the mounting hole, and therefore the sleeve 212 can be limited through the adjusting rod 214, and can only slide up and down along the hanging shaft 211; the driving device 215 is installed at the bottom end of the connection plate 4, and the driving device 215 and the screw cylinder 213 are connected.

When the height of the projector body 1 is adjusted, people can act on the driving device 215 through the rod assembly 3, the driving device 215 can drive the threaded cylinder 213 to rotate, and the adjusting rod 214 can be moved and adjusted in the up-down direction under the limit action of the sliding assembly 6, namely, the height of the projector body 1 is adjusted.

As shown in fig. 2, the driving device 215 includes a transmission assembly 2151 and a driving assembly 2152, wherein the transmission assembly 2151 is connected with the screw barrel 213, when the height of the projector body 1 is adjusted, a person acts on the driving assembly 2152 through the rod assembly 3, and the driving assembly 2152 acts on the transmission assembly 2151, so that the screw barrel 213 can be rotated, and thus the height of the projector body 1 can be adjusted.

As shown in fig. 2 to 4, the transmission assembly 2151 includes a worm wheel 21512 and a worm 21511 that are engaged with each other, wherein the worm wheel 21512 is fixedly installed at the outside of the screw barrel 213, and the worm 21511 is rotatably installed at the bottom end of the connection plate 4, and the worm 21511 is connected to the driving assembly 2152; that is, the lever assembly 3 acts on the driving assembly 2152, and the driving assembly 2152 can drive the worm 21511 to rotate, and the worm 21511 acts on the worm wheel 21512, thereby rotating the screw barrel 213.

As shown in fig. 2 to 4, the driving assembly 2152 includes two sets of gears 21521 and two sets of racks 21522, the two sets of gears 21521 are mounted at two ends of the worm 21511 through unidirectional bearings, the two sets of racks 21522 are slidably disposed at two sides of the bottom end of the connection plate 4, as shown in fig. 3, but the two racks 21522 are not located at the same side of the gear 21521, that is, the two sets of racks 21522 are located at different sides of the gear 21521, so that when the different racks 21522 move downward, the rotation directions of the two sets of gears 21521 are different, and thus the rotation directions of the worm 21511 are different, and the racks 21522 are engaged with the lever assembly 3 through the first engaging member 5.

As shown in fig. 1 and 3, the first mating member 5 includes an integrated straight rod and a circular ring, the straight rod is mounted at the bottom end of the rack 21522, the rod assembly 3 includes a long rod, and a hook-shaped rod is mounted at the top end of the long rod.

When the height of the projector body 1 is adjusted, a long rod is held by hand, the hook-shaped rod is clamped into the circular ring, then the rack 21522 is pulled downwards to move downwards, when the rack 21522 moves downwards, the gear 21521 acts on the gear 21521, so that the worm 21511 can be driven to rotate, and the two racks 21522 just drive the worm 21511 to rotate positively and negatively due to different installation positions of the two racks 21522; when the rack 21522 moves up, the gear 21521 does not drive the worm 21511 to rotate at this time because the gear 21521 is mounted by the unidirectional bearing; therefore, the screw thread cylinder 213 can be driven to rotate in different directions by pulling different racks 21522, so that the height of the projector body 1 can be adjusted up and down.

In this embodiment, as shown in fig. 4, a sliding plate 8 is installed at the bottom end of the connecting plate 4, a sliding groove is provided at one side of the rack 21522, and the sliding plate 8 and the sliding groove form a sliding fit, so as to realize sliding installation of the rack 21522; in order to facilitate the more labor-saving and quick pulling of the rack 21522, a first spring 7 is arranged between the slide plate 8 and the slide groove, so that after the rack 21522 is pulled to move downwards, the rack 21522 can be quickly returned to the position above under the action of the first spring 7, and the labor is saved.

In this embodiment, as shown in fig. 5, the angle adjusting frame 22 includes a ball seat 221, a positioning component 222, a driving structure 223 and a ball 224, where the projector body 1 can be mounted on the outer portion of the ball 224 by a bolt, the ball seat 221 is mounted on the bottom end of the adjusting rod 214 by a bolt, the positioning component 222 and the driving structure 223 are both disposed on the ball seat 221, the ball 224 is rotatably mounted inside the ball seat 221, i.e. the ball 224 can rotate in multiple directions in the ball seat 221, so as to adjust the rotation angle of the projector body 1 in multiple directions, and the positioning component 222 can lock the ball 224, so as to limit the adjusted ball 224.

In use, we unlock the sphere 224 from the positioning assembly 222 by acting on the driving structure 223 through the lever assembly 3, and then angle-adjust the projector body 1 through the lever assembly 3; after the adjustment is completed, the positioning assembly 222 can be again locked to the ball 224 by the lever assembly 3 acting on the driving structure 223.

In this embodiment, as shown in fig. 6, 7 and 8, the positioning assembly 222 includes a plurality of groups of positioning rods 2221, the positioning rods 2221 are elastically slidably disposed at the side portion of the ball seat 221 at equal distances, as shown in fig. 8, the positioning rods 2221 are slidably disposed at the side portion of the ball seat 221, the positioning rods 2221 can extend into the ball seat 221 and contact with the ball 224 in the ball seat 221, a second spring 13 is installed in the side portion of the ball seat 221, one end of the second spring 13 is connected with the outside of the positioning rods 2221 through a fixing ring, under the action of the second spring 13, one end of the positioning rods 2221 can tightly abut against the ball 224, so as to lock the ball 224, and a connecting piece 12 is installed at the other end of the positioning rods 2221, in the locked state, the connecting piece 12 is closely attached to the side portion of the ball seat 221, and the connecting piece 12 is matched with the driving structure 223; that is, the driving structure 223 may move the positioning rod 2221 away from the ball 224 through the connection piece 12, thus unlocking the ball 224.

In this embodiment, as shown in fig. 6 and 7, the driving structure 223 includes a ring body 2231, the ring body 2231 is rotatably mounted on the outer side of the ball seat 221, a plurality of inclined blocks 2232 are provided on the outer side of the ring body 2231, the inclined blocks 2232 correspond to the connecting pieces 12, a second matching piece 9 is mounted on the outer side of the ring body 2231, as shown in fig. 6, the second matching piece 9 is a long plate, a circular hole is provided at an end of the long plate, and the hook-shaped rod of the rod assembly 3 is clamped into the circular hole and then drives the ring body 2231 to rotate; when the oblique block 2232 rotates and the connecting piece 12 is dislocated, the positioning component 222 is locked to the sphere 224, and when the oblique block 2232 rotates and the connecting piece 12 contacts and corresponds to the connecting piece, the positioning rod 2221 of the positioning component 222 is far away from the sphere 224 under the action of the positioning rod 2221, so that the sphere 224 is unlocked, and the sphere 224 can be rotationally adjusted.

In this embodiment, as shown in fig. 7, a damping layer is disposed inside the ball seat 221, and the damping layer may preferably be a rubber layer 11, so that a certain damping force is provided between the ball 224 and the ball seat 221; because it is difficult to keep the ball 224 in an adjusted state after the positioning assembly 222 is unlocked from the ball 224, the ball 224 can be kept in an adjusted state by the damping force of the rubber layer 11, i.e. after the ball 224 is adjusted by the external force rotation angle, the ball 224 can be kept in a static state after the external force disappears, so that the adjusted limit is facilitated.

In order to further improve the limit of the positioning assembly 222 to the sphere 224, a rubber block 14 may be installed at one end of the positioning rod 2221, so that the friction force between the positioning rod 2221 and the sphere 224 may be improved, and the rubber block 14 may adopt an arc structure that is tangential to the sphere 224, so that the contact area with the sphere 224 is improved, and further the locking effect is further improved.

Because the corresponding situation of the inclined block 2232 and the connecting piece 12 on the ring body 2231 can not be clearly observed when the ring body 2231 is rotated indoors and outdoors, two groups of baffles 10 can be fixedly arranged on the side part of the ball seat 221; as shown in fig. 5, when the second mating member 9 abuts against the right baffle 10, the oblique block 2232 and the connecting piece 12 are in a staggered state, i.e., the positioning assembly 222 is in a locking state with respect to the sphere 224; as shown in fig. 6, when the second mating member 9 abuts against the left baffle 10, the oblique block 2232 and the connecting piece 12 are in a corresponding contact state, and the positioning rod 2221 is far away from the sphere 224 under the action of the oblique block, that is, the positioning component 222 releases the locking of the sphere 224.

The working principle of the utility model is as follows:

firstly, the top end of a hanging shaft 211 is installed on the indoor top through components such as a flange, a bolt and the like, after the installation, when the height of a projector body 1 is required to be adjusted, a long rod is held by hand, a hook-shaped rod at the top end of the long rod is clamped into a circular ring below one rack 21522, then the rack 21522 is pulled downwards, when the rack 21522 moves downwards, the rack 21522 acts on a gear 21521 so as to drive a worm 21511 to rotate, the worm 21511 acts on a worm wheel 21512 so as to drive a threaded cylinder 213 to rotate, then the rack 21522 can be quickly restored to the position above under the action of a spring 7, and then the rack 21522 is pulled again, and the operation is repeated; the hook-shaped rod at the top end of the long rod is clamped into the circular ring below the other rack 21522, and the thread cylinder 213 can be rotated in the same way, so that the thread cylinder 213 can be driven to rotate in different directions by pulling different racks 21522 to move, and the height of the projector body 1 can be adjusted up and down.

When the angle of the projector body 1 needs to be adjusted, the hook-shaped rod of the rod assembly 3 is clamped into the round hole, then the ring body 2231 is driven to rotate, the second matching piece 9 rotates to be abutted against the baffle 10 on the left side, at the moment, the inclined block 2232 and the connecting piece 12 are in corresponding contact states, the positioning rod 2221 is far away from the sphere 224 under the action of the positioning rod, namely the positioning assembly 222 releases the locking of the sphere 224, then the projector body 1 can be pushed by the rod assembly 3 to perform angle adjustment, in order to enable the projector body 1 to be better operated, annular rods can be arranged at four corners of the bottom end of the projector body 1, and therefore the hook-shaped rod at the top end of the long rod can be clamped into the annular rods, and angle adjustment of the projector body 1 is facilitated; after the adjustment is completed, the hook-shaped rod of the rod assembly 3 is clamped into the round hole, then the ring body 2231 is driven to rotate, the second matching piece 9 rotates to be abutted against the right baffle 10, the inclined block 2232 and the connecting piece 12 are in a staggered state, one end of the positioning rod 2221 can move and tightly abutted against the sphere 224 under the action of the second spring 13, and then the sphere 224 can be locked.

To sum up, when carrying out the subsequent angle and the altitude mixture control of projector body 1, people just need not ascend a height and adjust it, compares in prior art moreover and adjusts spacingly through unscrewing and tightening corresponding bolt, and the mode of adjusting is more convenient and the security is also good.

The foregoing has outlined the basic principles, main features and advantages of the present application. It will be appreciated by persons skilled in the art that the present application is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the present application, and that various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of protection of the present application is defined by the appended claims and equivalents thereof.

Claims (7)

1. A multimedia projector arbor sleeve hanger comprising: the projector comprises a projector body and an adjustable hoisting bracket, wherein the projector body is arranged on the hoisting bracket; when the projector body is adjusted, a worker is suitable for being matched with the hoisting support through the rod assembly, so that the projector body is adjusted in all directions;

the lifting support comprises a height adjusting support body and an angle adjusting support body, and the angle adjusting support body is respectively suitable for being connected with the projector body and the height adjusting support body; the rod assembly is suitable for being matched with the height adjusting frame body, so that the height of the projector body is adjusted; the rod assembly is suitable for being matched with the angle adjusting frame body, so that the projector body can be subjected to angle adjustment;

the height adjusting frame body comprises a hanging shaft, an adjusting rod, a sleeve, a threaded cylinder and a driving device, wherein the bottom end of the adjusting rod is suitable for being connected with the angle adjusting frame body, the top end of the adjusting rod is suitable for being connected with the sleeve through a connecting plate, the adjusting rod is suitable for being in sliding fit with the hanging shaft through a sliding assembly, the threaded cylinder is rotatably installed on the sleeve, the threaded cylinder is sleeved on the hanging shaft through threads, the sleeve is movably sleeved on the hanging shaft, and the driving device is installed on the connecting plate and is suitable for being connected with the threaded cylinder; when the height of the projector body is adjusted, a worker is suitable for acting on the driving device through the rod assembly to drive the threaded cylinder to rotate, so that the adjusting rod moves up and down;

the angle adjusting frame body comprises a ball seat, a ball body, a positioning assembly and a driving structure, wherein the ball body is rotatably installed in the ball seat, the projector body is installed in the ball body, the ball seat is installed at the bottom end of the adjusting rod, the positioning assembly and the driving structure are installed in the ball seat, and the positioning assembly is suitable for locking the ball body; the rod assembly is suitable for unlocking the ball seat by the positioning assembly through the driving structure when the angle of the projector body is adjusted; after the angular adjustment of the projector body is completed, the lever assembly is adapted to pass through the driving structure so that the positioning assembly locks the sphere again.

2. The multimedia projector spindle sleeve hanger of claim 1 wherein: the driving device comprises a transmission assembly and a driving assembly, and the transmission assembly is suitable for being in fit connection with the threaded cylinder; when the height of the projector body is adjusted, the driving assembly is suitable for driving the threaded cylinder to rotate through the transmission assembly.

3. The multimedia projector spindle sleeve hanger of claim 2 wherein: the transmission assembly comprises a worm wheel and a worm which are meshed with each other, the worm wheel is arranged on the threaded cylinder, the worm is rotatably arranged on the connecting plate, and the worm is suitable for being connected with the driving assembly; when the height of the projector body is adjusted, the driving assembly is suitable for driving the worm to rotate, so that the worm wheel drives the threaded cylinder to synchronously rotate.

4. A multimedia projector spindle sleeve hanger as claimed in claim 3 wherein: the driving assembly comprises two groups of gears and two groups of racks, the two groups of gears are mounted at two ends of the worm through unidirectional bearings, the racks are vertically and slidably arranged at two sides of the bottom end of the connecting plate, the gears are meshed with the corresponding racks, the two groups of racks are located at different sides relative to the gears, and the racks are suitable for being matched with the rod assembly through a first matching piece.

5. The multimedia projector spindle sleeve hanger of claim 1 wherein: the positioning assembly comprises a plurality of groups of positioning rods, the positioning rods are elastically and slidably arranged on the side parts of the ball seat, the positioning rods are abutted against the ball body, the ball body is locked, and the end parts of the positioning rods are matched with the driving structure through connecting sheets; the driving structure is suitable for enabling the locating rod to be far away from the sphere through the connecting sheet so as to enable the sphere to be unlocked.

6. The multimedia projector spindle sleeve hanger of claim 5 wherein: the driving structure comprises a ring body, the ring body is rotatably arranged on the side part of the ball seat, a plurality of inclined blocks are arranged on the side part of the ring body, and the outer part of the ring body is matched with the rod assembly through a second matching piece; when the inclined block and the connecting sheet are misplaced, the positioning component is suitable for locking the sphere; when the inclined block rotates to be in contact with the connecting sheet, the positioning rod is away from the sphere so as to unlock the sphere.

7. The multimedia projector spindle sleeve hanger of claim 6 wherein: two groups of baffles are fixedly arranged on the side part of the ball seat; when the positioning assembly locks the sphere, the second matching piece is propped against one group of baffle plates; when the positioning assembly releases the locking of the sphere, the second matching piece is propped against the other group of baffles.