Laser projection device

Abstract

This application discloses a laser projection device, belonging to the field of projection display. The laser projection device includes: a housing, multiple casters, clamping fixtures, locking blocks, and a handle. After the height of the laser projection device is adjusted, the handle drives the locking block to rotate, thereby applying force to a connecting rod through one end of the clamping fixture connected to the locking block, and locking the connecting rod upon contact. This prevents accidental movement of the clamping fixture and locking block integrated within the receiving cavity. Furthermore, the coordinated locking action of the locking block and clamping fixture reduces the probability of the casters rotating even if accidentally activated. Thus, the height distance between the casters supporting the housing and the housing remains unchanged, preventing the laser projection device from tilting as a whole.

Description

Technical Field

[0001] This application relates to the field of projection display, and in particular to a laser projection device. Background Technology

[0002] With the continuous development of technology, laser projection systems are increasingly being used in people's work and daily lives. A laser projection system mainly consists of a laser projection device, a projection screen, and a TV cabinet. The laser projection device emits a laser beam towards the projection screen, which receives the beam to display an image.

[0003] Currently, laser projection equipment typically includes a housing and multiple casters connected to the housing. The casters support the housing on a TV cabinet, and the distance between the housing and the TV cabinet can be adjusted by rotating the casters, thereby adjusting the position of the image projected onto the projection screen. Additionally, locking nuts are usually installed on the outside of the housing to secure the casters.

[0004] However, during the use of laser projection equipment, the locking nut is easily touched, which can cause the locking nut to fail to lock the casters, making the casters very easy to rotate, resulting in poor display quality of the image projected on the projection screen. Summary of the Invention

[0005] This application provides a laser projection device. It solves the problem in existing laser projection devices where the casters are easily rotated due to accidental contact. The technical solution is as follows:

[0006] On one hand, a laser projection device is provided, the laser projection device comprising:

[0007] A housing having a receiving cavity;

[0008] Multiple casters, each caster comprising: a caster body and a connecting rod, the connecting rod being movably connected to the housing, and a portion of the connecting rod being located inside the receiving cavity and another portion being located outside the receiving cavity, the portion of the connecting rod located outside the receiving cavity being fixedly connected to the caster body;

[0009] A clamping fixture is located within the receiving cavity, one end of which has a clamping space, and a portion of the connecting rod is located within the clamping space;

[0010] A locking block connected to the other end of the clamping fixture, and a handle located outside the receiving cavity and fixedly connected to the locking block;

[0011] The handle is configured to: drive the locking block to rotate, causing one end of the clamping clamp to apply force to the connecting rod, or to stop one end of the clamping clamp from applying force to the connecting rod.

[0012] The beneficial effects of the technical solutions provided in this application include at least the following:

[0013] A laser projection device may include: a housing, multiple casters, a clamping fixture, a locking block, and a handle. The clamping fixture and the locking block are disposed within a cavity in the housing, and a handle is fixedly connected to the locking block outside the cavity. After the height of the laser projection device is adjusted, the handle allows for easy rotation of the locking block, which in turn applies force to a connecting rod through one end of the clamping fixture connected to the locking block, locking the connecting rod in place. This prevents accidental movement of the clamping fixture and locking block within the cavity during use. Furthermore, the locking action of the locking block and clamping fixture minimizes the probability of accidental rotation of the casters even if they are accidentally activated. This ensures that the height distance between the casters supporting the housing remains constant, preventing the laser projection device from tilting and resulting in better image display on the laser projection screen. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a partial structural schematic diagram of a laser projection device provided in an embodiment of this application;

[0016] Figure 2 yes Figure 1 A schematic diagram illustrating the effect of the clamping fixture, locking block, and handle on the caster when it is not clamped.

[0017] Figure 3 yes Figure 1 A schematic diagram illustrating the clamping effect of the clamping fixture, locking block, and handle on the caster.

[0018] Figure 4 This is a schematic diagram of the connection between a caster and a housing provided in an embodiment of this application;

[0019] Figure 5This is a partial structural schematic diagram of another laser projection device provided in an embodiment of this application;

[0020] Figure 6 This is a schematic diagram of the structure of a clamping component provided in an embodiment of this application;

[0021] Figure 7 This is a schematic diagram illustrating the connection between a clamping component and a friction-enhancing pad according to an embodiment of this application;

[0022] Figure 8 This is a schematic diagram illustrating the effect of connecting an elastic element and a clamping member according to an embodiment of this application;

[0023] Figure 9 This is a partial structural schematic diagram of another laser projection device provided in the embodiments of this application;

[0024] Figure 10 This is a schematic diagram of the structure of a handle provided in an embodiment of this application;

[0025] Figure 11 This is a partial structural schematic diagram of another laser projection device provided in the embodiments of this application;

[0026] Figure 12 This is an exploded view of a clamping component and a rotating shaft provided in an embodiment of this application;

[0027] Figure 13 yes Figure 12 The diagram shows the installation of the clamping component and the rotating shaft;

[0028] Figure 14 This is a schematic diagram of the structure of a laser projection system provided in an embodiment of this application.

[0029] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0031] In related technologies, after the casters are locked by locking nuts located on the outside of the housing, a recess is provided at the bottom of the housing to ensure the appearance requirements of the laser projection equipment. The casters can be located within this recess, which provides some protection for the casters. However, when readjusting the casters, the user has limited operating space in the recess, making it inconvenient to operate the casters.

[0032] Please refer to Figure 1 and Figure 2 , Figure 1 This is a partial structural schematic diagram of a laser projection device provided in an embodiment of this application. Figure 2 yes Figure 1 The diagram illustrates the effect of the clamping fixture, locking block, and handle on the caster when it is not properly clamped. Figure 3 yes Figure 1 The diagram illustrates the clamping effect of the clamping fixture, locking block, and handle on the casters. The laser projection device 000 may include: a housing 100, multiple casters 200, a clamping fixture 300, a locking block 400, and a handle 500.

[0033] The housing 100 in the laser projection device 000 may have a receiving cavity 101.

[0034] The caster 200 in the laser projection device 000 may include a caster body 201 and a connecting rod 202. The connecting rod 202 can be movably connected to the housing 100, and a portion of the connecting rod 202 can be located inside the receiving cavity 101 in the housing 100, while another portion of the connecting rod 202 can be located outside the receiving cavity 101 in the housing 100. The portion of the connecting rod 202 located outside the receiving cavity 101 in the housing 100 can be fixedly connected to the caster body 201. In this application, the connecting rod 202 in the caster 200 can be threadedly connected to the housing 100 to achieve a movable connection between the connecting rod 202 and the housing 100. For example, the laser projection device 000 typically has four corners, and the number of casters 200 in the laser projection device 000 can be two, as can the number of corresponding clamping clamps 300, locking blocks 400, and handles 500. In other possible implementations, the number of casters 200 in the laser projection device 000 can be four. The four casters 200 can be located at the four corners of the laser projection device 000, and the corresponding number of clamping fixtures 300, locking blocks 400, and handles 500 can all be four.

[0035] The clamping fixture 300 in the laser projection device 000 can be located within the receiving cavity 101 in the housing 100. One end of the clamping fixture 300 can have a clamping space, and a portion of the connecting rod 202 can be located within this clamping space.

[0036] The locking block 400 in the laser projection device can be connected to the other end of the clamping fixture 300.

[0037] The handle 500 in the laser projection device 000 can be located outside the receiving cavity 101 in the housing 100 and can be fixedly connected to the locking block 400. The handle 500 can be configured to: drive the locking block 400 to rotate, so that one end of the clamping clamp 300 applies a force to the connecting rod 202, or stop one end of the clamping clamp 300 from applying a force to the connecting rod 202.

[0038] For example, such as Figure 2 and Figure 3 As shown, when debugging the laser projection device 000, the user can first appropriately lift the housing 100 within the laser projection device 000. Then, the user can hold the handle 500 and use it to rotate the locking block 400 a certain angle in the first direction, causing one end of the clamping fixture 300 to stop applying force to the connecting rod 202. Next, the user applies force to the connecting rod 202 in the caster 200, causing the connecting rod 202 to move relative to the housing 100. This adjusts the ratio of the portion of the connecting rod 202 in the caster 200 located inside the receiving cavity 101 within the housing 100 to the portion located outside the receiving cavity 101. Then, the user again uses the handle 500 to rotate the locking block 400 a certain angle in the second direction, causing one end of the clamping fixture 300 to apply force to the connecting rod 202. At this point, the clamping fixture 300 abuts against the side of the connecting rod 202, clamping part of the connecting rod 202 within the clamping space at one end of the clamping fixture 300, thereby clamping the connecting rod 202 in the caster 200. Finally, the laser projection device 000 is placed on the TV cabinet in the laser projection system, so that all the casters 200 are in contact with the cabinet surface, thus completing the adjustment of the distance between the laser projection device 000 and the TV cabinet (specifically, the height adjustment between the housing of the laser projection device and the caster body). The first direction and the second direction are two opposite directions. For example, the first direction can be clockwise, and the second direction can be counterclockwise.

[0039] In this embodiment, a clamping clamp 300 and a locking block 400 connected to the clamping clamp 300 are provided in the receiving cavity 101 of the housing 100, and a handle 500 fixedly connected to the locking block 400 is provided outside the receiving cavity 101. After the height of the laser projection device 000 is adjusted, the locking block 400 can be easily rotated by the handle 500, thereby applying a force to the connecting rod 202 through one end of the clamping clamp 300 connected to the locking block 400, and clamping the connecting rod 202 after contacting it. In this way, during the use of the laser projection device 000, the clamping clamp 300 and the locking block 400 integrated in the receiving cavity 101 will not be accidentally moved. In addition, due to the clamping action of the locking block 400 and the clamping clamp 300, even if the caster body 201 is accidentally touched, the probability of the caster body 201 rotating is low. In this way, the height distance between the caster body 201, which supports the housing 100 in the laser projection device 000, and the housing 100 will not change, so that the laser projection device 000 as a whole will not tilt, thereby making the display effect of the image projected by the laser projection device 000 onto the laser projection screen better.

[0040] In summary, this application provides a laser projection device, which may include: a housing, multiple casters, a clamping fixture, a locking block, and a handle. The clamping fixture and the locking block connected to it are disposed within a receiving cavity in the housing, and a handle fixedly connected to the locking block is disposed outside the receiving cavity. After the height of the laser projection device is adjusted, the handle can easily rotate the locking block, thereby applying force to the connecting rod through one end of the clamping fixture connected to the locking block, and locking the connecting rod upon contact. Thus, during use, the clamping fixture and locking block integrated within the receiving cavity will not move due to accidental contact. Furthermore, the locking action of the locking block and clamping fixture reduces the probability of the casters rotating even if accidentally contacted. This ensures that the height distance between the casters supporting the housing of the laser projection device and the housing itself does not change, thus preventing the laser projection device from tilting and resulting in a better display effect of the image projected onto the laser projection screen.

[0041] Optionally, the connecting rod 202 in the caster 200 may have external threads, and the housing 100 may have a first threaded hole (not shown in the figure) that communicates with the receiving cavity 101 and mates with the external threads on the connecting rod 202. The connecting rod 202 can be threadedly connected to the housing 100. In this case, the connecting rod 202 in the caster 200 can be stably connected to the housing 100 via a threaded connection, ensuring that the caster 200 will not detach from the housing 100 when the distance between the caster body 201 and the bottom surface of the housing 100 is adjusted by rotating the connecting rod 202. For an example, please refer to... Figure 4 , Figure 4 This is a schematic diagram illustrating the connection between a caster and a housing according to an embodiment of this application. In practical applications, a threaded hole that mates with the external thread on the connecting rod 202 can be directly formed on the housing 100. Alternatively, an embedded nut A can be provided in the housing 100 to achieve a threaded connection between the housing 100 and the connecting rod 202. This embodiment of the application does not impose specific limitations on this approach.

[0042] In the embodiments of this application, please refer to Figure 5 , Figure 5 This is a partial structural schematic diagram of another laser projection device provided in an embodiment of this application. The clamping fixture 300 in the laser projection device 000 may include two clamping members 301, each clamping member 301 having a first end 301a and a second end 301b disposed opposite to each other. A clamping space may be formed between the first ends of the two clamping members 301, and a locking block 400 in the laser projection device 000 may be located between the second ends 301b of the two clamping members 301. The portions of the two clamping members 301 located between the first ends 301a and the second ends 301b are movably connected; that is, the portion of one clamping member 301 located between its first ends 301a and second ends 301b is movably connected to the portion of the other clamping member 301 located between its first ends 301a and second ends 301b. The handle 500 can be configured to rotate the locking block 400 so that the locking block 400 applies opposite forces to the second ends 301b of the two clamping members 301 respectively, or to stop the locking block 400 from applying opposite forces to the second ends 301b of the two clamping members 301.

[0043] For example, when debugging the laser projection device 000, the user can first lift the housing 100 of the laser projection device 000 appropriately. Then, the user can hold the handle 500 and rotate the locking block 400 by a certain angle in the first direction, thereby releasing the opposing forces applied by the locking block 400 to the second ends 301b of the two clamping members 301. Afterwards, a force is applied to the connecting rod 202 in the caster 200, causing the connecting rod 202 to move relative to the housing 100. That is, the ratio of the portion of the connecting rod 202 in the caster 200 located inside the receiving cavity 101 in the housing 100 to the portion located outside the receiving cavity 101 is adjusted. Then, the user again rotates the locking block 400 by a certain angle in the second direction using the handle 500, causing the two ends of the locking block 400 to apply opposing forces to the second ends 301b of the two clamping members 301. At this time, the portions of the two clamping members 301 located between the first ends 301a and the second ends 301b are movably connected. Therefore, the second ends 301b of the two locking members 301 rotate in opposite directions, while the first ends 301a of the two locking members 301 rotate towards the connecting rod 202 and abut against the side of the connecting rod 202, thereby locking the connecting rod 202 in the caster 200. The first direction and the second direction are two opposite directions. For example, the first direction can be clockwise, and the second direction can be counterclockwise.

[0044] Thus, by providing two clamping members 301 within the receiving cavity 101 of the housing 100, and a locking block 400 located between the two clamping members 301, and by providing a handle 500 fixedly connected to the locking block 400 outside the receiving cavity 101, after the height of the laser projection device 000 is adjusted, the handle 500 drives the locking block 400 to rotate, causing the locking block 400 to push the second ends 301b of the two clamping members 301 to rotate in opposite directions, causing the first ends 301a of the two clamping members 301 to rotate towards the connecting rod 202 and, upon contact with the connecting rod 202, to clamp the connecting rod 202. In this way, during use, the two clamping members 301 and the locking block 400 integrated within the receiving cavity 101 will not be accidentally moved. Furthermore, through the locking action of the locking block 400 and the two clamping parts 301, the probability of the caster body 201 rotating even if it is accidentally activated is low. This ensures that the height distance between the caster body 201, which supports the housing 100 in the laser projection device 000, and the housing 100 remains unchanged, preventing the laser projection device 000 from tilting and resulting in better image display on the laser projection screen.

[0045] Optional, please refer to Figure 6 , Figure 6 This is a schematic diagram of a clamping component provided in an embodiment of this application. Each of the two clamping components 301 has a limiting groove 301c on the side of its first end 301a near the connecting rod 202. When the locking block 400 applies opposite forces to the second ends 301b of the two clamping components 301 respectively, the groove surfaces of the limiting grooves 301c on the first ends 301a of both clamping components 301 can abut against the side of the connecting rod 202 in the caster 200. In this configuration, by providing a limiting groove 301c on the side of the first end 301a of each clamping member 301 near the connecting rod 202, when the handle 500 drives the locking block 400 to rotate, the locking block 400 pushes the second ends 301b of the two clamping members 301 to rotate in opposite directions, causing the first ends 301a of the two clamping members 301 to rotate closer to the connecting rod 202, and ensuring that the groove surfaces of both limiting grooves 301c abut against the side of the connecting rod 202. This further effectively ensures the clamping effect of the first ends 301a of the two clamping members 301 on the connecting rod 202 in the caster 200. It should be noted that the clamping effect of the first ends 301a of the clamping members 301 on the connecting rod 202 is achieved through the frictional force applied by the first ends 301a of the clamping members 301 to the side of the connecting rod 202.

[0046] Please refer to the following in this application: Figure 6 and Figure 7 , Figure 7 This is a schematic diagram illustrating the connection between a clamping member and a friction-enhancing pad according to an embodiment of this application. The clamping fixture 300 may further include a friction-enhancing pad 302 fixed to the groove surface of a limiting groove 301c on the first end 301a of the clamping member 301. When the locking block 400 applies opposite forces to the second ends 301b of the two clamping members 301 respectively, the friction-enhancing pad 302 can abut against the side of the connecting rod 202 in the caster 200. In this way, the friction-enhancing pad 302 can further increase the friction between the first end 301a of the clamping member 301 and the side of the connecting rod 202, further effectively ensuring the clamping effect of the two clamping members 301 on the connecting rod 202. For example, there may be two friction-enhancing pads 302, and the two friction-enhancing pads 302 are fixedly connected to the groove surface of the limiting groove 301c in the two clamping members 301 respectively. The friction-enhancing pad 302 may be made of a material with a high coefficient of friction. For example, the friction-enhancing pad 302 can be a structure made of rubber material, and this application does not specifically limit this.

[0047] In the embodiments of this application, such as Figure 6As shown, the groove surface of the limiting groove 301c provided on the first end 301a of each clamping member 301 may include a first side plane c1 and a second side plane c2, which may intersect. When the locking block 400 applies opposite forces to the second ends 301b of the two clamping members 301, both the first side plane c1 and the second side plane c2 can abut against the side of the connecting rod 202 in the caster 200. In this case, the clamping of the connecting rod 202 is achieved by the abutment of the first side plane c1 and the second side plane c2 against the side of the connecting rod 200. Since the contact area between the side plane and the side of the connecting rod 202 is small, the pressure applied by the side plane to the connecting rod 202 is relatively large, ensuring the limiting effect of the first side plane c1 and the second side plane c2 on the connecting rod 202. For example, the first side plane c1 and the second side plane c2 may have a certain included angle, the size of which can be set according to the connecting rod 202. It should be noted that, in other possible implementations, the groove surface of the limiting groove 301c can also be an arc surface, at least a portion of which can abut against the side of the connecting rod 202, thereby achieving the locking of the connecting rod 202.

[0048] Optional, please refer to Figure 5 and Figure 8 , Figure 8 This is a schematic diagram illustrating the effect of connecting an elastic element and a clamping member according to an embodiment of this application. The clamping fixture 300 in the laser projection device 000 may further include an elastic element 303 located between the first ends 301a of the two clamping members 301, with both ends of the elastic element 303 fixedly connected to the first ends 301a of the two clamping members 301, respectively. In this case, when the height of the laser projection device 000 needs to be adjusted, the user rotates the locking block 400 via the handle 500 to release the locking block 400 from applying opposing forces to the second ends 301b of the clamping members 301. Since both ends of the elastic element 303 are fixedly connected to the first ends 301a of the two clamping members 301, the elastic element 303 can apply opposing forces to the first ends 301a of the two clamping members 301, causing the first ends 301a of the two clamping members 301 to rotate in opposite directions. In this way, the first ends 301a of the two clamping parts 301 are completely separated from the side of the connecting rod 202, which makes it easier for the user to adjust the distance between the caster body 201 and the housing 100 by rotating the caster 200, so as to adjust the height of the laser projection device 000 and increase the user's user experience.

[0049] It should be noted that when the locking block 400 applies opposite forces to the second ends 301b of the two locking members 301 respectively, the elastic element 303 can be compressed when the first ends of the two locking members 301 rotate toward the connecting rod 202. For example, the elastic element 303 can be a spring or other components with a certain elasticity, and this application embodiment does not specifically limit it.

[0050] In the embodiments of this application, please refer to Figure 9 and Figure 10 , Figure 9 This is a partial structural schematic diagram of another laser projection device provided in an embodiment of this application. Figure 10 This is a schematic diagram of a handle provided in an embodiment of this application. The side of the housing 100 near the caster body 201 may have an arc-shaped groove 102 communicating with the receiving cavity 101 in the housing 100. The handle 500 in the laser projection device 000 may have a guide protrusion 501 on the side near the housing 100, at least a portion of which may be located within the arc-shaped groove 102. In this case, by providing the arc-shaped groove 102 in the housing 100, the guide protrusion 501 on the handle 500 is located within the arc-shaped groove 102. Thus, when the user rotates the locking block 400 by rotating the handle 500, the guide protrusion 501 can slide within the arc-shaped groove 102. That is, the arc-shaped groove 102 can provide a certain guiding and limiting effect on the sliding of the guide protrusion 501, making the handle 500 more controllable and facilitating the rotation of the locking block 400 by rotating the handle 500.

[0051] Please refer to the following in this application: Figure 9 , Figure 10 and Figure 11 , Figure 11 This is a partial structural schematic diagram of another laser projection device provided in this application embodiment. To ensure that the handle 500 does not detach from the housing 100 during the rotation of the locking block 400, a fixing member B can be provided within the receiving cavity 101 of the housing 100. This fixing member B can be fixedly connected to the end of the guide protrusion 501 opposite to the handle 500, and the side of the fixing member B near the guide protrusion 501 can contact the inner wall of the receiving cavity 101. For example, the fixing member B can be a stud, and the guide protrusion 501 can have a second threaded hole (not shown in the figure). The stud mates with the second threaded hole to achieve a fixed connection between the stud and the guide protrusion 501.

[0052] Optional, such as Figure 9 and Figure 10As shown, the handle 500 may also have a connecting protrusion 502 on the side near the housing 100. The locking block 400 located in the receiving cavity 101 of the housing 100 may have a connecting hole 401. The connecting protrusion 502 can be fixed in the connecting hole 401 (i.e., the connecting protrusion and the connecting hole can be fixedly connected by an interference fit) to achieve a fixed connection between the handle 500 and the locking block 400. It should be noted that the handle 500 and the locking block 400 can also be fixedly connected by other means, and this application embodiment does not specifically limit this.

[0053] In the embodiments of this application, such as Figure 9 As shown, the arc-shaped slide groove 102 in the housing 100 may include a limiting slot 102a and a slide groove body 102b communicating with the limiting slot 102a. When the locking block 400 in the laser projection device 000 applies opposing forces to the second ends 301b of the two clamping members 301, the guide protrusion 501 in the handle 500 can engage with the limiting slot 102a. In this case, while the handle 500 drives the guide protrusion 501 to slide within the slide groove body 102b, the handle 500 can also drive the locking block 400 to rotate, so that the locking block 400 applies opposing forces to the second ends 301b of the two clamping members 301, thereby enabling the first ends 301a of the two clamping members 301 to clamp the connecting rod 202. At this time, the guide protrusion 501 can engage with the limiting slot 102a, so that the guide protrusion 501 can be positioned within the limiting slot 102a. Thus, when the handle 500 is accidentally activated, the guide protrusion 501 on the handle 500 is less likely to disengage from the limiting groove 102a, ensuring good contact between the locking block 400 fixedly connected to the handle 500 and the second ends 301b of the two clamping members 301. For example, when the height of the laser projection device 000 needs to be adjusted, the user can apply a certain force to the guide protrusion 501, causing the guide protrusion 501 to disengage from the limiting groove 102a, thereby allowing the guide protrusion 501 to slide within the slide body 102b. While the guide protrusion 501 slides within the slide body 102b, the handle 500 can drive the locking block 400 to rotate, thereby releasing the opposing force applied by the locking block 400 to the second ends 301b of the two clamping members 301. This prevents the first ends 301a of the two clamping members 301 from clamping the connecting rod 202.

[0054] In the embodiments of this application, such as Figure 9 and Figure 11As shown, the housing 100 also has a perforated groove 103 adjacent to the arc-shaped slide groove 102 on the side near the caster body 201. This perforated groove 103 is closer to the locking block 400 than the arc-shaped slide groove 102. In this case, by providing the perforated groove 103 in the housing 100 adjacent to the arc-shaped slide groove 102, the perforated groove 103 can effectively reduce the strength at the perforated groove 103 in the housing 100, making it easier for the guide protrusion 501 to engage with the limiting groove 102a. Alternatively, after the guide protrusion 501 engages with the limiting groove 102a, when the user applies a certain force to the guide protrusion 501, the guide protrusion 501 can be easily released from the limiting groove 102a. In this application, the hollow groove 103 is closer to the locking block 400 than the arc-shaped slide groove 102, and the hollow groove 103 can be set at a position closer to the limiting slot 102a.

[0055] Optional, such as Figure 10 As shown, the handle 500 in the laser projection device 000 may have an auxiliary support 503 on the side near the housing 100. The side of the auxiliary support 503 facing away from the handle 500 can contact the housing 100. In this case, by providing the auxiliary support 503 on the side of the handle 500 near the housing 100, only the auxiliary support 503 contacts the housing 100 during the rotation of the handle 500. This effectively reduces the friction area between the handle 500 and the housing 100, ensuring smoother rotation of the handle 500 and improving the user experience. It should be noted that in other possible implementations, the side of the handle 500 near the housing 100 may directly contact the housing 100. Alternatively, there may be a certain gap between the side of the handle 500 near the housing 100 and the housing 100. This embodiment does not specifically limit this.

[0056] In the embodiments of this application, please refer to Figure 12 and Figure 13 , Figure 12 This is an exploded view of a clamping component and a rotating shaft provided in an embodiment of this application. Figure 13 yes Figure 12The diagram shows the installation of the clamping member and the rotating shaft. Each clamping member 301 may have a connector 301d at the portion between its first end 301a and second end 301b, and this connector 301d may have a connecting hole d1. The clamping fixture 300 in the laser projection device 000 may further include a rotating shaft 304, which can sequentially pass through the connecting holes d1 on the two connectors 301d to connect with each of the two connectors 301d. In this case, by providing a connector 301d between the first end 301a and second end 301b of each clamping member 301, and by having the rotating shaft 304 sequentially pass through the connecting holes d1 on the two connectors 301d, connection with the two connectors 301d is achieved. Thus, the two clamping members 301 can be movably connected through the cooperation of the two connectors 301d and the rotating shaft 304. For example, when the second ends 301b of the two clamping members 301 move towards each other, the first ends 301a of the two clamping members 301 can move relative to each other; or, when the second ends 301b of the two clamping members 301 move relative to each other, the first ends 301a of the two clamping members 301 can move towards each other. In this application, after one end of the rotating shaft 304 passes through the connecting holes d1 on the two adapter members 301d and is connected to the adapter members 301d, in order to prevent the rotating shaft 304 from falling off the adapter members 301d, a threaded hole (not shown in the figure) can be opened at one end of the rotating shaft 304. A stud with external threads (not shown in the figure) is connected to the threaded hole to limit one end of the rotating shaft 304.

[0057] Optional, such as Figure 12 As shown, the clamping fixture 300 in the laser projection device 000 may further include a lubricating pad 305 located between the two adapters 301d, wherein two oppositely disposed end faces of the lubricating pad 305 can respectively contact the two adapters 301d. In this case, by providing the lubricating pad 305 between the two adapters 301d, the lubricating pad 305 can avoid direct contact between the two adapters 301d, thereby enabling the two adapters 301d to rotate relatively smoothly relative to each other, improving the user experience. For example, the lubricating pad 305 may be a sheet structure made of polyoxymethylene (POM) resin, or made of other materials with anti-friction properties; this application embodiment does not specifically limit this.

[0058] In the embodiments of this application, such as Figure 12As shown, a first lubricating pad 306 can be provided between the adapter 301d closer to the inner wall of the receiving cavity 101 in the housing 100 and the inner wall of the receiving cavity 101. This first lubricating pad 306 can be fixedly connected to the side of the adapter 301d closest to the inner wall of the receiving cavity 101. Thus, during the relative rotation of the two adapters 301d, this adapter 301d contacts the inner wall of the receiving cavity 101 through the first lubricating pad 306, preventing direct contact between the adapter 301d and the inner wall of the receiving cavity 101, effectively reducing the frictional resistance between the adapter 301d and the inner wall of the receiving cavity 101.

[0059] In summary, this application provides a laser projection device, which may include: a housing, multiple casters, a clamping fixture, a locking block, and a handle. The clamping fixture and the locking block connected to it are disposed within a receiving cavity in the housing, and a handle fixedly connected to the locking block is disposed outside the receiving cavity. After the height of the laser projection device is adjusted, the handle can easily rotate the locking block, thereby applying force to the connecting rod through one end of the clamping fixture connected to the locking block, and locking the connecting rod upon contact. Thus, during use, the clamping fixture and locking block integrated within the receiving cavity will not move due to accidental contact. Furthermore, the locking action of the locking block and clamping fixture reduces the probability of the casters rotating even if accidentally contacted. This ensures that the height distance between the casters supporting the housing of the laser projection device and the housing itself does not change, thus preventing the laser projection device from tilting and resulting in a better display effect of the image projected onto the laser projection screen.

[0060] This application also provides a laser projection system, which can be an ultra-short-throw laser projection system. For example, please refer to... Figure 14 , Figure 14 This is a schematic diagram of a laser projection system provided in an embodiment of this application. The laser projection system may include: a projection screen 001 and a laser projection device 000. The laser projection device 000 may be any of the laser projection devices shown in the above embodiments.

[0061] Thus, when the laser projection device 000 is working, it can emit light at an angle upwards, allowing it to project an image onto the projection screen 001. In this application, the laser projection device 000 integrates a clamping fixture 300, a locking block 400, and a handle 500. Through the cooperation of the clamping fixture 300, locking block 400, and handle 500, the casters 200 in the laser projection device 000 are locked. Therefore, during use, the locking effect of each clamping fixture 300 on its corresponding caster 200 reduces the probability of accidental rotation of any caster 200. This ensures effective support from the casters 200, preventing the laser projection device 000 from tilting and guaranteeing a better display effect of the image projected onto the projection screen 001.

[0062] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0063] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A laser projection device, characterized in that, include: A housing having a receiving cavity; Multiple casters, each caster comprising: a caster body and a connecting rod, the connecting rod being movably connected to the housing, and a portion of the connecting rod being located inside the receiving cavity and another portion being located outside the receiving cavity, the portion of the connecting rod located outside the receiving cavity being fixedly connected to the caster body; A clamping fixture located within the receiving cavity includes: two clamping members and a friction-enhancing pad; each clamping member has a first end and a second end disposed opposite to each other, a clamping space is formed between the first ends of the two clamping members, and a portion of the connecting rod is located within the clamping space; the portion of the two clamping members located between the first end and the second end is movably connected; the friction-enhancing pad is fixed to the first end of the clamping member; A locking block located between the second ends of the two locking members, and a handle located outside the receiving cavity and fixedly connected to the locking block; The handle is configured to: drive the locking block to rotate, causing the locking block to apply opposite forces to the second ends of the two locking members respectively, or to stop the locking block from applying opposite forces to the second ends of the two locking members; The housing has an arc-shaped groove communicating with the receiving cavity on the side near the caster body, and the handle has a guide protrusion on the side near the housing, at least a portion of which is located within the arc-shaped groove; The arc-shaped slide groove includes: a limiting slot and a slide groove body communicating with the limiting slot; when the locking block applies opposite forces to the second ends of the two locking members respectively, the guide protrusion engages with the limiting slot; the side of the housing near the caster body also has a hollowed-out groove adjacent to the arc-shaped slide groove, and the hollowed-out groove is closer to the locking block than the arc-shaped slide groove.

2. The laser projection device according to claim 1, characterized in that, Each of the clamping elements has a limiting groove on the side of its first end near the connecting rod; When the locking block applies opposite forces to the second ends of the two clamping members, the groove surfaces of the limiting grooves provided on the first ends of the two clamping members abut against the side of the connecting rod.

3. The laser projection device according to claim 2, characterized in that, The groove surface within the limiting groove includes a first side plane and a second side plane, wherein the first side plane intersects with the second side plane.

4. The laser projection device according to claim 1, characterized in that, The clamping fixture further includes an elastic element located between the first ends of the two clamping members, the two ends of the elastic element being fixedly connected to the first ends of the two clamping members respectively.

5. The laser projection device according to any one of claims 1 to 4, characterized in that, The handle has an auxiliary support on the side near the housing, and the side of the auxiliary support opposite to the handle is in contact with the housing.

6. The laser projection device according to any one of claims 1 to 4, characterized in that, Each of the clamping members has a connector in the portion located between the first end and the second end, the connector having a connecting hole; The clamping fixture further includes a rotating shaft, which passes sequentially through the connecting holes on the two adapters to connect to the two adapters respectively.

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