Laser projection device

Abstract

The application discloses a laser projection device and belongs to the field of projection display. The laser projection device comprises a shell, a plurality of casters and a locking assembly. By arranging a clamping piece in the accommodating cavity in the shell, after the height adjustment of the laser projection device is completed, the movement of the clamping piece is driven by the handle piece to abut against the inner wall of the accommodating cavity in the shell, so that the connecting rod in the caster is locked. In this way, during the use of the projection device, the clamping piece integrated in the accommodating cavity will not be moved due to accidental touch. In addition, through the clamping effect of the clamping piece, even if the caster body is accidentally touched, the probability of rotation of the caster body is relatively low. In this way, the clamping effect of the clamping piece on the caster is ensured, so that the height distance between the caster body for supporting the shell and the shell will not change. Even the overall projection device will not produce the adverse phenomenon of inclination, and the display effect of the picture projected on the laser projection screen is better.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of projection display, in particular to a laser projection device. BACKGROUND

[0002] With the continuous development of science and technology, laser projection systems are increasingly applied to people's work and life. The laser projection system mainly includes a laser projection device, a projection screen and a TV cabinet. Among them, the laser projection device emits a light beam to the projection screen, and the projection screen receives the light beam to realize the display of the picture.

[0003] At present, the laser projection device usually includes a shell and a plurality of casters connected with the shell. The shell can be supported on the TV cabinet through the plurality of casters, and the distance between the shell and the TV cabinet can be adjusted by rotating the casters to adjust the position of the picture projected on the projection screen. In addition, in order to lock the rotation of the casters, a locking nut connected with the casters is usually arranged outside the shell.

[0004] However, during use of the laser projection device, the locking nut is easy to be touched, which causes the locking nut to lose the locking effect on the casters, so that the casters are prone to rotate, and thus the display effect of the picture projected on the projection screen is poor. SUMMARY

[0005] The embodiment of the present application provides a laser projection device. The problem that the casters of the laser projection device in the prior art are easily rotated due to being touched by mistake can be solved, and the technical scheme is as follows:

[0006] In one aspect, a laser projection device is provided, and the laser projection device comprises:

[0007] a shell, the shell having a receiving cavity;

[0008] a plurality of casters, the casters comprising: a caster body and a connecting rod, the connecting rod being movably connected with the shell, and a part of the connecting rod being located in the receiving cavity and another part of the connecting rod being located outside the receiving cavity, and the part of the connecting rod located outside the receiving cavity being fixedly connected with the caster body;

[0009] a locking assembly, the locking assembly comprising: a clamping piece and a handle piece, the clamping piece being located in the receiving cavity and movably connected with the part of the connecting rod located in the receiving cavity, and a part of the handle piece being located in the receiving cavity and another part of the handle piece being located outside the receiving cavity;

[0010] The handle piece is configured to drive the clamping piece to move along the axial direction of the connecting rod.

[0011] The technical scheme provided by the embodiment of the present application has at least the following beneficial effects:

[0012] A laser projection device can include a housing, a plurality of casters and a locking assembly. By arranging a clamping member in a receiving cavity in the housing, after the height of the laser projection device is adjusted, the clamping member is moved by the handle member to abut against the inner wall of the receiving cavity in the housing to lock the connecting rod in the caster. In this way, during use of the laser projection device, the clamping member integrated in the receiving cavity will not be moved by accidental touch. In addition, through the clamping action of the clamping member, even if the caster body is accidentally touched, the probability of the caster body rotating is relatively low. In this way, the clamping action of the clamping member on the caster is ensured, so that the height distance between the caster body and the housing for supporting the housing in the laser projection device will not change. Even the laser projection device as a whole will not produce the undesirable phenomenon of tilting, and thus the display effect of the picture projected by the laser projection device on the laser projection screen is better. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 is a structural schematic diagram of a laser projection device provided by an embodiment of the present application;

[0015] Figure 2 is a partial sectional view of a laser projection device provided by an embodiment of the present application;

[0016] Figure 3 is a partial structural schematic diagram of a laser projection device provided by an embodiment of the present application;

[0017] Figure 4 is Figure 3 is a mounting schematic diagram of the handle member and the housing shown in FIG. 8;

[0018] Figure 5 is a mounting schematic diagram of an adjusting rod and a sliding groove provided by an embodiment of the present application;

[0019] Figure 6 is a structural schematic diagram of a clamping member provided by an embodiment of the present application;

[0020] Figure 7 is a structural schematic diagram of a handle member provided by an embodiment of the present application;

[0021] Figure 8 is an effect schematic diagram of the clamping member abutting against the inner wall of the receiving cavity provided by an embodiment of the present application;

[0022] Figure 9 is a schematic diagram of the effect that the clamping piece is separated from the inner wall of the accommodating cavity provided by an embodiment of the present application;

[0023] Figure 10 is a schematic diagram of the effect that the clamping piece is in contact with the inner wall of the accommodating cavity of the shell provided by an embodiment of the present application;

[0024] Figure 11 is a schematic diagram of another structure of a clamping piece provided by an embodiment of the present application;

[0025] Figure 12 is a schematic diagram of the structure of a laser projection system provided by an embodiment of the present application.

[0026] Through the above-mentioned drawings, the specific embodiments of the present application have been shown, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0028] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the structure of a laser projection device provided by an embodiment of the present application, Figure 2 is a partial sectional view of a laser projection device provided by an embodiment of the present application. The laser projection device 000 can include a shell 100, a plurality of casters 200 and a locking assembly 300.

[0029] The shell 100 in the laser projection device 000 can have an accommodating cavity 101.

[0030] The caster 200 in the laser projection device 000 can include a caster body 201 and a connecting rod 202, the connecting rod 202 can be movably connected with the shell 100, and a part of the connecting rod 202 can be located in the accommodating cavity 101 in the shell 100, and another part of the connecting rod 202 can be located outside the accommodating cavity 101 in the shell 100. The part of the connecting rod 202 located outside the accommodating cavity 101 in the shell 100 can be fixedly connected with the caster body 201. In this application, the connecting rod 202 in the caster 200 can be threadedly connected with the shell 100 to achieve the movable connection of the connecting rod 202 with the shell 100. For example, the laser projection device 000 usually has four corners, and the number of casters 200 in the laser projection device 000 can be two, and the number of corresponding locking assemblies 300 can also be two. In other possible implementations, the number of casters 200 in the laser projection device 000 can be four, and the four casters 200 can be respectively located at the four corners of the laser projection device 000, and the number of corresponding locking assemblies 300 can also be four.

[0031] The locking assembly 300 in the laser projection device 000 can include a clamping piece 301 and a handle piece 302. The clamping piece 301 can be located in the accommodating cavity 101 in the shell 100 and can be movably connected with the part of the connecting rod 202 located in the accommodating cavity 101. A part of the handle piece 302 can be located in the accommodating cavity 101 in the shell 100, and another part of the handle piece 302 can be located outside the accommodating cavity 101. The part of the handle piece 302 located in the accommodating cavity 101 in the shell 100 can be connected with the clamping piece 301 in the locking assembly 300. It should be noted that a plurality of locking assemblies 300 can also share one handle piece 302, and the embodiments of this application do not make specific limitations on this.

[0032] The handle piece 302 in the locking assembly 300 can be configured to drive the clamping piece 301 to move along the axial direction of the connecting rod 202.

[0033] For example, when the laser projection device 000 is debugged, first, the user can appropriately lift the shell 100 in the laser projection device 000; then, the clamping piece 301 is moved on the connecting rod 202 by the handle piece 302, and the clamping piece 301 is separated from the inner wall of the accommodating cavity 101 in the shell 100; then, it is ensured that the handle piece 302 does not move (that is, it is ensured that the clamping piece does not move relative to the connecting rod), and at the same time, an acting force is applied to the connecting rod 202, so that the connecting rod 202 moves relative to the shell 100. That is, the proportion of the part of the connecting rod 202 in the caster 200 located in the accommodating cavity 101 in the shell 100 and the part located outside the accommodating cavity 101 is adjusted; then, the clamping piece 301 is moved on the connecting rod 202 by the handle piece 302 again, and the clamping piece 301 is in abutment with the inner wall of the accommodating cavity 101 in the shell 100; finally, the laser projection device 000 is placed on the television cabinet in the laser projection system, so that the plurality of casters 200 are in contact with the cabinet surface of the television cabinet, that is, the adjustment of the distance between the laser projection device and the television cabinet (specifically, the height adjustment between the shell in the laser projection device and the caster body) can be completed.

[0034] In the embodiment of the present application, by arranging the clamping piece 301 in the accommodating cavity 101 in the shell 100, after the height adjustment of the laser projection device 000 is completed, the clamping piece 301 is moved on the connecting rod 202 by the handle piece 302 to abut against the inner wall of the accommodating cavity 101 in the shell 100, so as to lock the connecting rod 202 in the caster 200. In this way, during the use of the laser projection device 000, the clamping piece 301 integrated in the accommodating cavity 101 will not be moved due to accidental touch. In addition, through the clamping action of the clamping piece 301, even if the caster body 201 is accidentally touched, the probability of rotation of the caster body 201 is relatively low. In this way, the clamping action of the clamping piece 301 on the caster 200 is ensured, so that the height distance between the caster body 201 for supporting the shell 100 in the laser projection device 000 and the shell 100 will not change, that is, the laser projection device 000 as a whole will not produce the adverse phenomenon of tilting, and thus the display effect of the picture projected by the laser projection device 000 on the laser projection screen is better.

[0035] In summary, the embodiment of the present application provides a laser projection device, which can include a shell, a plurality of casters and a locking assembly. By arranging the clamping piece in the accommodating cavity in the shell, after the height adjustment of the laser projection device is completed, the clamping piece is moved by the handle piece to abut against the inner wall of the accommodating cavity in the shell to lock the connecting rod in the caster. In this way, during use of the laser projection device, the clamping piece integrated in the accommodating cavity will not be moved due to accidental touch. In addition, through the clamping action of the clamping piece, even if the caster body is accidentally touched, the probability of rotation of the caster body is relatively low. In this way, the clamping action of the clamping piece on the caster is ensured, so that the height distance between the caster body for supporting the shell in the laser projection device and the shell will not change. Even the laser projection device as a whole will not have the adverse phenomenon of tilting, and thus the display effect of the picture projected by the laser projection device on the laser projection screen is better.

[0036] Optionally, the clamping piece 301 in the locking assembly 300 can be threadedly connected with the part of the connecting rod 202 located in the accommodating cavity 101 in the shell 100. The handle piece 302 in the locking assembly 300 can be configured to drive the clamping piece 301 to rotate around the axis of the connecting rod 202 to drive the clamping piece 301 to move on the connecting rod 202. In this case, by arranging the clamping piece 301 to be threadedly connected with the part of the connecting rod 202 located in the accommodating cavity 101 in the shell 100. In this way, when the handle piece 302 drives the clamping piece 301 to rotate around the axis of the connecting rod 202, the clamping piece 301 can be driven to move on the connecting rod 202 along the length direction of the connecting rod 202. For example, the handle piece 302 can drive the clamping piece 301 to rotate clockwise around the axis of the connecting rod 202, so that the clamping piece 301 moves on the connecting rod 202 in the direction close to the caster body 201, and finally abuts against the inner wall of the accommodating cavity 101 in the shell 100 to achieve the locking of the clamping piece 301 on the caster 200. The handle piece 302 can also drive the clamping piece 301 to rotate counterclockwise around the axis of the connecting rod 202, so that the clamping piece 301 moves on the connecting rod 202 in the direction away from the caster body 201, and finally separates from the inner wall of the accommodating cavity 101 to release the locking action of the clamping piece 301 on the caster 200, so that the caster 200 can rotate to adjust the height of the laser projection device 000.

[0037] In the embodiment of the present application, please refer to Figure 3 and Figure 4 , Figure 3 is a partial structure schematic view of a laser projection device provided by the embodiment of the present application, Figure 4 is Figure 3The diagram shows the installation of the handle and the housing. The side of the housing 100 near the caster body 201 may have a groove 102 communicating with a receiving cavity 101 within the housing 100. The portion of the handle 302 located within the receiving cavity 101 passes through the groove 102 and connects to the locking member 301. In this case, by providing the groove 102 on the housing 100, the handle 302 can easily pass through the groove 102 and connect to the locking member 301. Thus, when the handle 302 drives the locking member 301 to move on the connecting rod 202, the handle 302 can slide within the groove 102, and the groove 102 provides a certain degree of limitation for the handle 302. This improves the convenience and efficiency of the handle 302 driving the locking member 301 to move on the connecting rod 202.

[0038] Optional, such as Figure 3 and Figure 4 As shown, the locking component 301 in the locking assembly 300 may have a connecting hole 3011. The handle component 302 may include a handle component body 3021 and an adjusting rod 3022. The handle component body 3021 may be located outside the receiving cavity 101 in the housing 100, and a portion of the adjusting rod 3022 may be located inside the receiving cavity 101, while another portion of the adjusting rod 3022 may be located outside the receiving cavity 101. The portion of the adjusting rod 3022 located outside the receiving cavity 101 in the housing 100 may be fixedly connected to the handle component body 3021, while the portion of the adjusting rod 3022 located inside the receiving cavity 101 may pass sequentially through the slide groove 102 and the connecting hole 3011 before connecting to the locking component 301. In this configuration, by providing a connecting hole 3011 on the clamping member 301, when controlling the movement of the clamping member 301 on the connecting rod 202 via the handle member 302, the user first holds the handle member body 3021 and passes the adjusting rod 3022, which is fixedly connected to the handle member body 3021, through the slide groove 102 and the connecting hole 3011 on the clamping member 301. Then, the user applies a force to the clamping member 301 through the handle member body 3021 and the adjusting rod 3022, causing the clamping member 301 to rotate relative to the connecting rod 202 while moving along the length direction of the connecting rod 202.

[0039] In the embodiments of this application, please refer to Figure 5 , Figure 5is a mounting schematic diagram of an adjusting rod and a sliding slot provided by an embodiment of the present application. The sliding slot 102 in the shell 100 can be a circular arc-shaped guide sliding slot A, and the center of the circular arc-shaped guide sliding slot A can be located on the axis of the connecting rod 202 in the caster 200. In this case, by setting the sliding slot 102 in the shell 100 as the circular arc-shaped guide sliding slot A, and the center of the circular arc-shaped guide sliding slot A can be located on the axis of the connecting rod 202. In this way, when the handle body 3021 drives the clamping piece 301 to move on the connecting rod 202 through the adjusting rod 3022, the adjusting rod 3022 can slide in the circular arc-shaped guide sliding slot A, and the circular arc-shaped guide sliding slot A can guide and limit the movement of the adjusting rod 3022, further improving the convenience and efficiency of the handle 302 driving the clamping piece 301 to move on the connecting rod 202. It should be noted that when the sliding slot 102 is a circular arc-shaped guide sliding slot A, the number of the circular arc-shaped guide sliding slots A can be the same as the number of the adjusting rods 3022 in the handle 302, so that each adjusting rod 3022 can slide in the corresponding circular arc-shaped guide sliding slot A.

[0040] Optionally, please refer to Figure 3 and Figure 6 , Figure 6 is a structure schematic diagram of a clamping piece provided by an embodiment of the present application. The number of the connecting holes 3011 in the clamping piece 301 can be multiple, and the multiple connecting holes 3011 can be distributed around the connecting rod 202. The number of the adjusting rods 3022 in the handle 302 can be at least two, and the number of the connecting holes 3011 can be more than the number of the adjusting rods 3022. Among them, after the at least two adjusting rods 3022 respectively pass through at least two connecting holes 3011 in the multiple connecting holes 3011, the handle 302 can be connected with the clamping piece 301 in the locking assembly 300. In this case, by setting the number of the connecting holes 3011 on the clamping piece 301 as multiple, and the multiple connecting holes 3011 are distributed around the connecting rod 202. In this way, the user can connect the at least two adjusting rods 3022 with the clamping piece 301 by passing through the at least two connecting holes 3011, and the at least two adjusting rods 3022 can conveniently drive the clamping piece 301 to rotate relative to the connecting rod 202.

[0041] In addition, when debugging the laser projection device 000, since the number of the connecting holes 3011 is more than the number of the adjusting rods 3022. Therefore, it is convenient for the user to quickly insert the adjusting rod 3022 in the handle 302 into the connecting hole 3011 to assemble with the clamping piece 301, effectively improving the user's experience. It should be noted that in other possible implementation manners, the number of the connecting holes 3011 and the number of the adjusting rods 3022 can also be the same, and the present application does not make specific limitations on this. For example, Figure 3As shown, the number of the adjusting rods 3022 can be two, the two adjusting rods 3022 can be connected with two connection holes 3011 of the plurality of connection holes 3011, and the line connecting the centers of the two connection holes 3011 intersects the axis of the connecting rod 202. Alternatively, the number of the adjusting rods 3022 can be three, the three adjusting rods 3022 can be connected with three connection holes 3011 of the plurality of connection holes 3011, and the line connecting the centers of the three connection holes 3011 can form an equilateral triangle, and the center of the equilateral triangle can be located on the axis of the connecting rod 202.

[0042] In other possible implementation manners, the number of the connection holes 3011 in the clamping member 301 can be at least one, and the number of the adjusting rods 3022 can be one. The one adjusting rod 3022 can pass through one of the at least one connection hole 3011 to achieve the connection between the handle member 302 and the clamping member 301. In this way, the clamping member 301 can also be subjected to the force by the one handle member 302, so that the clamping member 301 can move on the connecting rod 202.

[0043] In the embodiments of the present application, please refer to Figure 7 , Figure 7 is a structural schematic diagram of a handle member provided by the embodiments of the present application. The handle member body 3021 in the handle member 302 can be in a rod shape, and the handle member 302 can further include at least two adapter rods 3023 corresponding to the at least two adjusting rods 3022. Each adapter rod 3023 can be located outside the accommodating cavity 101 in the shell 100, one end of each adapter rod 3023 can be fixedly connected with the end of the corresponding adjusting rod 3022 located outside the accommodating cavity 101, and the other end of each adapter rod 3023 can be fixedly connected with the end of the handle member body 3021. The extension direction of the adapter rod 3023 can be perpendicular to the extension direction of the adjusting rod 3022, and the extension direction of the adjusting rod 3022 can be perpendicular to the extension direction of the handle member body 3021. In addition, the end of the handle member body 3021 away from the adapter rod 3023 can protrude from the shell 100.

[0044] In this case, by setting the extending direction of the adapter rod 3023 perpendicular to the extending direction of the adjusting rod 3022, and setting the extending direction of the adjusting rod 3022 perpendicular to the extending direction of the handle body 3021, and the end of the handle body 3021 away from the adapter rod 3023 protrudes from the shell 100 in the laser projection device 000. In this way, the user can apply a force to the adjusting rod 3022 through the handle body 3021 and the adapter rod 3023, that is, further improve the convenience of operation. It should be noted that in this application, when the number of laser projection devices 000 is multiple, the multiple laser projection devices 000 can share one handle 302. In this way, the generalization degree of multiple devices is higher, and the manufacturing cost of the laser projection device 000 is effectively reduced.

[0045] Optionally, please refer to Figure 6 and Figure 8 , Figure 8 is an effect schematic diagram of the abutment of the clamping piece and the inner wall of the accommodating cavity provided by the embodiment of the application. The connecting rod 202 in the caster 200 can have an external thread, and the clamping piece 301 in the locking assembly 300 can have a first threaded hole a1 matched with the external thread on the connecting rod 202. In this case, by matching the external thread in the connecting rod 202 in the caster 200 with the first threaded hole a1 on the clamping piece 301, the threaded connection of the connecting rod 202 and the clamping piece 301 is achieved. In this way, after the adjusting rod 3022 in the handle 302 applies a force to the clamping piece 301, the clamping piece 301 can rotate around the axis of the connecting rod 202 to rise or fall along the length direction of the connecting rod 202. For example, please refer to Figure 8 and Figure 9 , Figure 9 is an effect schematic diagram of the separation of the clamping piece and the inner wall of the accommodating cavity provided by the embodiment of the application. When the clamping piece 301 rises along the length direction of the connecting rod 202, the side of the clamping piece 301 close to the caster body 201 is separated from the inner wall of the accommodating cavity 101, and the user can adjust the distance between the caster body 201 and the bottom surface of the shell 100 through the threaded connection between the connecting rod 202 and the shell 100. When the clamping piece 301 falls along the length direction of the connecting rod 202, the side of the clamping piece 301 close to the caster body 201 abuts against the inner wall of the accommodating cavity 101, so that the clamping piece 301 can lock the caster 200. In this way, even if the caster 200 is accidentally touched, the probability of the caster body 201 in the caster 200 rotating is relatively low due to the pre-tightening force of the caster 200 generated by the abutment of the clamping piece 301 and the inner wall of the accommodating cavity 101. In this way, the clamping effect of the clamping piece 301 on the caster 200 is effectively ensured, that is, the normal use of the laser projection device 000 is ensured.

[0046] In the embodiment of the present application, the shell 100 can have a second threaded hole (not shown in the figure) in communication with the accommodating cavity 101 and matched with the external thread on the connecting rod 202, and the connecting rod 202 can be threadedly connected with the shell 100. In this case, the connecting rod 202 in the caster 200 can be stably connected with the shell 100 in a threaded connection manner, so as to ensure that the caster 200 will not fall off from the shell 100 when the connecting rod 202 in the caster 200 is rotated to adjust the distance between the caster body 201 and the bottom surface of the shell 100. For example, in actual application, a threaded hole matched with the external thread on the connecting rod 202 can be directly formed on the shell 100. Alternatively, as shown in Figure 8 and Figure 9 , an embedded nut B can also be arranged in the shell 100, and the threaded connection between the shell 100 and the connecting rod 202 is realized through the embedded nut B, which is not specifically limited in the embodiment of the present application.

[0047] Optionally, please refer to Figure 10 and Figure 11 , Figure 10 is a schematic view of the contact between the clamping member and the inner wall of the accommodating cavity of the shell provided in the embodiment of the present application, Figure 11 is a structural schematic view of another clamping member provided in the embodiment of the present application. The inner wall of the accommodating cavity 101 in the shell 100 facing the clamping member 301 can have a first supporting protrusion 103, and the side of the clamping member 301 close to the caster body 201 can have a second supporting protrusion 3012. Wherein, the handle member 302 is configured to drive the clamping member 301 to move on the connecting rod 202 in the caster 200, so that the first supporting protrusion 103 abuts against the second supporting protrusion 3012. Alternatively, the first supporting protrusion 103 is separated from the second supporting protrusion 3012. In this case, by arranging the first supporting protrusion 103 on the inner wall of the accommodating cavity 101 in the shell 100 and arranging the second supporting protrusion 3012 on the side of the clamping member 301 close to the caster body 201, when the clamping member 301 is driven to rotate on the connecting rod 202 by the handle member 302, the movement stroke of the clamping member 301 on the connecting rod 202 can be effectively reduced. That is, the user can drive the clamping member 301 to rotate a smaller distance through the handle member 302, and the clamping member 301 can abut against the first supporting protrusion 103 arranged on the inner wall of the accommodating cavity 101 to realize the clamping of the clamping member 301 on the caster 200.

[0048] In the embodiment of the present application, the part of the handle piece 302 located in the accommodating cavity 101 in the shell 100 can be detachably connected with the clamping piece 301. In this way, after the height of the laser projection device 000 is adjusted, the handle piece 302 can be separated from the clamping piece 301, and the handle piece 302 can be removed from the shell 100. In this way, only the casters 200 are exposed outside the shell 100 in the laser projection device 000, so that the overall appearance of the laser projection device 000 has a higher level of delicacy.

[0049] In summary, the embodiment of the present application provides a laser projection device, which can include a shell, a plurality of casters and a locking assembly. By arranging the clamping piece in the accommodating cavity in the shell, after the height adjustment of the laser projection device is completed, the clamping piece is moved by the handle piece to abut against the inner wall of the accommodating cavity in the shell to lock the connecting rod in the caster. In this way, during the use of the laser projection device, the clamping piece integrated in the accommodating cavity will not be moved due to accidental touch. In addition, through the clamping action of the clamping piece, even if the caster body is accidentally touched, the probability of rotation of the caster body is relatively low. In this way, the clamping action of the clamping piece on the caster is ensured, so that the height distance between the caster body for supporting the shell in the laser projection device and the shell will not change. Even the overall laser projection device will not produce the adverse phenomenon of tilting, and thus the display effect of the picture projected by the laser projection device on the laser projection screen is better.

[0050] The embodiment of the present application also provides a laser projection system, which can be an ultra-short focus laser projection system. For example, please refer to Figure 12 , Figure 12 is a structural schematic diagram of a laser projection system provided by the embodiment of the present application. The laser projection system can include a projection screen 001 and a laser projection device 000. The laser projection device 000 can be any laser projection device shown in the above embodiments.

[0051] Therefore, when the laser projection device 000 is working, the laser projection device 000 can not only emit light obliquely upward, but also project pictures on the projection screen 001. In the present application, the locking assembly 300 is integrated in the laser projection device 000, and the locking assembly 300 is used to lock the casters 200 in the laser projection device 000 by the cooperation of the clamping piece 301 and the handle piece 302. Therefore, during the use of the laser projection device 000, the probability of the rotation of each caster 200 after being accidentally touched is low due to the locking effect of each locking assembly 300 on the corresponding caster 200. In turn, the effective support of each caster 200 on the laser projection device 000 is ensured, so that the laser projection device 000 will not be tilted as a whole, and the display effect of the pictures projected by the laser projection device 000 on the projection screen 001 is ensured to be good.

[0052] In the present application, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance. The term "a plurality of" refers to two or more, unless otherwise explicitly limited.

[0053] The above description is only optional embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laser projection device, characterized by, The application relates to a height-adjustable laser projection device. The device comprises a shell having a containing cavity; a plurality of casters, each comprising a caster body and a connecting rod, the connecting rod being movably connected to the shell, and a part of the connecting rod being located in the containing cavity and another part being located outside the containing cavity, the part of the connecting rod located outside the containing cavity being fixedly connected to the caster body; and a locking assembly, comprising a clamping piece and a handle piece, the clamping piece being located in the containing cavity and movably connected to the part of the connecting rod located in the containing cavity, and a part of the handle piece being located in the containing cavity and another part being located outside the containing cavity. After the height of the laser projection device is adjusted, the handle piece drives the clamping piece to move along the axial direction of the connecting rod to abut against the inner wall of the containing cavity, so that the connecting rod of the caster is locked. The clamping piece is threadedly connected to the part of the connecting rod located in the containing cavity; and the handle piece is configured to drive the clamping piece to rotate around the axial line of the connecting rod, so as to drive the clamping piece to move on the connecting rod. One side of the shell close to the caster body has a sliding groove in communication with the containing cavity, and the part of the handle piece located in the containing cavity is connected to the clamping piece after passing through the sliding groove.

2. The laser projection device of claim 1, wherein, The sliding groove is a circular arc-shaped guide sliding groove.

3. The laser projection device of claim 2, wherein, The clamping piece has a connecting hole, and the handle piece comprises a handle piece body and an adjusting rod, the handle piece body being located outside the containing cavity, and a part of the adjusting rod being located in the containing cavity and another part being located outside the containing cavity.

4. The laser projection device of claim 3, wherein, The part of the adjusting rod located outside the containing cavity is fixedly connected to the handle piece body, and the part of the adjusting rod located in the containing cavity is connected to the clamping piece after sequentially passing through the sliding groove and the connecting hole.

5. The laser projection device of claim 3, wherein, The number of the connecting holes is plural, and the plural connecting holes are distributed around the connecting rod. The number of the adjusting rods is at least two, and the number of the connecting holes is more than the number of the adjusting rods.

6. The laser projection device of claim 5, wherein, After at least two adjusting rods pass through at least two connecting holes of the plural connecting holes respectively, the handle piece is connected to the clamping piece. The number of the connecting holes is at least one, and the number of the adjusting rods is one. After one adjusting rod passes through one connecting hole of the at least one connecting hole, the handle piece is connected to the clamping piece.

7. The laser projection device of claim 5, wherein, The connecting rod has an external thread, and the clamping piece has a first threaded hole matched with the external thread. The shell has a second threaded hole in communication with the containing cavity and matched with the external thread, and the connecting rod is threadedly connected to the shell.

8. The laser projection device of any one of claims 2 to 7, wherein, The part of the handle piece located in the containing cavity is detachably connected to the clamping piece.

9. The laser projection device of claim 8, wherein, ​ 10. The laser projection device according to any one of claims 1 to 7, wherein, ​

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