Projection device

Abstract

The application relates to the field of projection technology, and provides a projection device, which comprises a holder and a projection host, the projection host comprises a casing, the casing comprises a bottom plate, a front baffle, two side baffles and a cover, the bottom plate is arranged on the holder, the holder is used for driving the bottom plate to telescopically move, the front baffle is connected to the front side of the bottom plate along the telescopic direction, the two side baffles are respectively and one by one connected to the left and right sides of the bottom plate along a first direction, the front baffle and the side baffles surround the corresponding sides of the holder, and the cover is covered on the bottom plate, the front baffle and the side baffles; and the first direction is perpendicular to the telescopic direction. The application can reduce the level of the whole machine, and improve the product quality and the aesthetic property.

Description

Technical Field

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

[0002] Existing projection devices typically include a pan-tilt unit (PTZ) and a projector mounted on the PTU. The PTU drives the projector to adjust its angle or position. However, in existing designs, the projector is directly mounted on top of the PTU, resulting in a distinct layer between the projector and the PTU, a fragmented overall appearance, and a noticeable stacked structure, which negatively impacts the aesthetics and integration of the entire device. Utility Model Content

[0003] The purpose of this application is to provide a projection device that addresses the problem of poor sense of depth in existing projection devices.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: This application provides a projection device, including: Gimbal; A projection host includes a housing, which includes a base plate, a front baffle, two side baffles, and a cover. The base plate is mounted on a pan-tilt unit, which drives the base plate to extend and retract. The front baffle is connected to the front side of the base plate along the extension direction. The two side baffles are respectively connected to the left and right sides of the base plate along a first direction, and the front baffle and side baffles surround the corresponding sides of the pan-tilt unit. The cover covers the base plate, the front baffle, and the side baffles. Wherein, the first direction is perpendicular to the extension direction.

[0005] In some embodiments, the gimbal includes a base and a drive assembly, the base is provided with the bottom plate, the drive assembly is disposed in the base and connected to the bottom plate; the front baffle and the side baffle surround the corresponding sides of the base.

[0006] In some embodiments, the gimbal further includes a guide assembly, which includes rollers, guide rails, and connecting rods. Rollers and guide rails are provided on both the left and right sides of the base. A guide groove is provided on the inner side of the guide rail. The rollers are connected to the base and located within the guide grooves. The guide rails are capable of moving along the extension / retraction direction on the rollers. Side baffles are provided on the outer side of the guide rails. The connecting rod is connected to the drive assembly, and both ends of the connecting rod are respectively connected to the guide rails on both sides. The base plate is connected to the guide rails on both sides.

[0007] In some embodiments, each guide rail is connected to the base plate via two height adjustment components spaced apart along the telescopic direction. The height adjustment components are located within the side baffles corresponding to the guide rail and are used to adjust the pitch angle of the base plate.

[0008] In some embodiments, each of the guide rails is provided with a support portion on its outer side, and the support portion is provided with a mounting hole; The height adjustment assembly includes an elastic plug, a drive rod, and a locking nut. The elastic plug includes a body and a flange. The body is disposed in the mounting hole. The flanges are respectively provided on both ends of the body. The flanges at both ends are respectively clamped on the upper and lower sides of the mounting hole. The drive rod includes a screw and a knob. The screw passes through the body along the height direction. One end of the screw is threaded to the base plate. The knob is located in the middle of the screw and is pressed against the upper flange. The locking nut is connected to the other end of the screw and is used to lock it against the lower flange.

[0009] In some embodiments, the surface of the flange away from the body is an arc-shaped curved surface.

[0010] In some embodiments, the height adjustment assembly further includes a first shim disposed between the knob and the upper flange, wherein the projected area of ​​the first shim on the knob is smaller than the projected area of ​​the upper flange on the knob.

[0011] In some embodiments, the height adjustment assembly further includes a second shim disposed between the locking nut and the lower flange, wherein the projected area of ​​the second shim on the locking nut is smaller than the projected area of ​​the lower flange on the locking nut.

[0012] In some embodiments, the side baffle is provided with a window, which is correspondingly provided with the height adjustment component for adjusting the knob and the locking nut.

[0013] In some embodiments, the base plate is detachably connected to the front baffle and the side baffle, respectively, and the cover is detachably connected to the base plate, the front baffle and the side baffle, respectively.

[0014] The beneficial effects of the projection device provided in this application are as follows: Compared with the prior art, this application achieves a fully enclosed concealment of at least a portion of the pan-tilt unit by disassembling the projector's housing into a base plate, a front baffle, side baffles, and a cover, with the front baffle and side baffles respectively shielding the front and left / right sides of the pan-tilt unit, and the cover covering the top. When the projector retracts onto the pan-tilt unit, the front, left, right, and top sides of the pan-tilt unit are enclosed by the housing, visually forming an integrated, embedded overall appearance, significantly reducing the structural layering of the entire device and improving the product's texture and aesthetics. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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.

[0016] Figure 1 This is one of the structural schematic diagrams of the projection device provided in the embodiments of this application; Figure 2 This is a second schematic diagram of the projection device provided in the embodiments of this application; Figure 3 An exploded view of the projection device provided in the embodiments of this application; Figure 4 This is a schematic diagram of the gimbal structure provided in an embodiment of this application; Figure 5 This is a schematic diagram of the internal structure of the gimbal provided in an embodiment of this application; Figure 6 This is a structural assembly diagram of the height adjustment component provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of the elastic plug provided in an embodiment of this application; Figure 8 This is a schematic diagram of the structure of the drive rod provided in an embodiment of this application.

[0017] The following are the labeling elements in the figure: 1. Gimbal; 11. Base; 12. Second heat dissipation hole; 13. Base body; 14. Cover plate; 15. Mounting bracket; 16. Horizontal section; 17. Vertical section; 18. Motor; 19. Lead screw; 120. Slider; 121. Driving wheel; 122. Driven wheel; 123. Belt; 124. Clearance notch; 125. Protrusion; 126. Roller; 127. Guide rail; 128. Connecting rod; 129. Fixed rod; 130. Height adjustment assembly; 131. Support; 132. Mounting hole; 133. Elastic plug; 134. Drive rod; 135. Locking nut; 136. Main body; 137. Flange; 138. Screw; 139. Knob; 140. Arc-shaped surface; 141. First gasket; 142. Second gasket; 2. Projector main unit; 21. Casing; 22. Base plate; 23. Front baffle; 24. Side baffle; 25. Cover; 26. First heat dissipation hole; 27. Light transmission opening; 28. Rear baffle; 29. ​​Window; 230. Threaded post. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0019] In the description of the embodiments of this application, it should be understood that the terms "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0021] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0022] Existing projection devices typically include a pan-tilt unit (PTZ) and a projector mounted on the PTU. The PTU drives the projector to adjust its angle or position. However, in existing designs, the projector is directly mounted on top of the PTU, resulting in a distinct layer between the projector and the PTU, a fragmented overall appearance, and a noticeable stacked structure, which negatively impacts the aesthetics and integration of the entire device.

[0023] To address this, this application restructures the projector's casing to enclose and conceal the gimbal, achieving visual concealment of the gimbal when the projector retracts, thus creating an embedded, integrated appearance.

[0024] In some embodiments, refer to Figure 1 and Figure 3 As shown, this application provides a projection device, including: a pan-tilt unit 1 and a projection host 2. The projection host 2 includes a housing 21, which includes a base plate 22, a front baffle 23, two side baffles 24, and a cover 25. The base plate 22 is mounted on the pan-tilt unit 1, which drives the base plate 22 to extend and retract. The front baffle 23 is connected to the front side of the base plate 22 along the extension direction X. The two side baffles 24 are respectively connected to the left and right sides of the base plate 22 along the first direction Y, and the front baffle 23 and the side baffles 24 surround the corresponding sides of the pan-tilt unit 1. The cover 25 covers the base plate 22, the front baffle 23, and the side baffles 24.

[0025] like Figure 2 As shown, the extension / retraction direction X is the direction of movement of the projector 2 relative to the pan / tilt unit 1, i.e., the front-to-back direction. The first direction Y is the left-to-right direction of the projector 2. The extension / retraction direction X, the first direction Y, and the height direction Z of the projector 2 are perpendicular to each other.

[0026] The gimbal 1, as the driving component, is responsible for driving the projector 2 to extend and retract, adjusting the position of the projector 2 to facilitate projection.

[0027] The projector host 2 may include a housing 21 and a projection module, which is located inside the housing 21 and is used for projection. The projection module is conventional technology in this field and will not be described in detail here.

[0028] The housing 21 is composed of multiple components, forming an enclosed structure. Specifically, the base plate 22 is mounted on the gimbal 1, serving as the connector between the projector 2 and the gimbal 1; the front baffle 23 is connected to the front of the base plate 22, used to shield the front of the gimbal 1; two side baffles 24 are respectively connected to the left and right sides of the base plate 22, used to shield the left and right sides of the gimbal 1. The cover 25 covers the base plate 22, the front baffle 23, and the side baffles 24, used to shield the top of the gimbal 1. First heat dissipation holes 26 can be opened on the left and right sides of the cover 25. In addition, a light-transmitting opening 27 can be provided on the top of the cover 25, so that the imaging light of the projection module can be emitted through the light-transmitting opening. With the above layout, when the projector 2 is retracted onto the gimbal 1, its front baffle 23, side baffles 24, and cover 25 together enclose the front, left and right sides, and top of the gimbal 1 inside the housing 21, achieving a visually embedded effect, such as... Figure 1 As shown. It is understandable that, since the back of the pan-tilt unit 1 is typically fixed to the wall with screws or other fasteners, and users generally observe the entire unit from the front and left / right sides, the casing 21 of the projector 2 may not include the rear baffle 28. Alternatively, the casing 21 may include the rear baffle 28, which is connected to the rear side of the base plate 22. The cover 25 covers the rear baffle 28, and this rear baffle 28 is located on top of the pan-tilt unit 1, rather than surrounding the rear side of the pan-tilt unit 1, to avoid interference with the pan-tilt unit 1 and affecting the telescopic movement of the projector 2, such as... Figure 3 As shown.

[0029] Therefore, the projection device provided in this application embodiment can achieve visual hiding of the gimbal by optimizing the structure of the projection host casing while ensuring the normal driving function of the gimbal, thereby reducing the sense of layering of the overall structure and improving the appearance quality.

[0030] In some embodiments, refer to Figures 3 to 5 As shown, the gimbal 1 includes a base 11 and a drive assembly. The base 11 is provided with a base plate 22, and the drive assembly is located inside the base 11 and connected to the base plate 22. The front baffle 23 and the side baffle 24 surround the corresponding sides of the base 11.

[0031] The base 11 serves as the main support structure of the gimbal 1 and can be fixed to the external wall. Its interior forms a space for integrating drive components and other structures. A second heat dissipation hole 12 that communicates with the external environment can be provided on the base 11.

[0032] As an example, such as Figure 4 and Figure 5As shown, the base 11 may include a base body 13 and a cover plate 14. The cover plate 14 covers the base body 13, and there is a receiving space between the cover plate 14 and the base body 13. Multiple mounting brackets 15 may be provided on the base body 13. The mounting brackets 15 may be L-shaped, including a horizontal part 16 and a vertical part 17 that are perpendicularly connected to each other. The horizontal part 16 can be connected to the base body 13 by fasteners such as bolts. The vertical part 17 is located on the rear exterior of the base 11 and is used to fix it to the wall by fasteners such as bolts.

[0033] The base plate 22 of the projector 2 not only serves as the basic component of the housing 21, but also acts as a transmission component connected to the drive assembly. The drive assembly is located inside the base 11 and is used to drive the base plate 22 to extend or retract the entire projector 2. The drive assembly can be an electric actuator, a linear motor, a lead screw mechanism, etc.

[0034] As an example, such as Figure 5 As shown, the driving component is a lead screw mechanism, including a motor 18, a lead screw 19, and a slider 120. The motor 18 is located at the rear of the base 11. The output shaft of the motor 18 is connected to the lead screw 19 via a belt drive assembly. The lead screw 19 extends along the extension direction X. The slider 120 is threadedly connected to the lead screw 19 and can be driven to the base plate 22. When the motor 18 rotates, it drives the lead screw 19 to rotate, thereby moving the slider 120 along the lead screw 19, and then driving the entire projection host 2 to move synchronously via the base plate 22. The belt drive assembly includes a drive pulley 121, a driven pulley 122, and a belt 123 wound around the drive pulley 121 and the driven pulley 122. The drive pulley 121 is connected to the output shaft of the motor 18, the driven pulley 122 is connected to the rear end of the lead screw 19, and the front end of the lead screw 19 is rotatably connected to the base 13. Furthermore, a clearance notch 124 can be provided on the cover plate 14 to allow the slider 120 to move smoothly.

[0035] It is understandable that, such as Figures 2 to 5 As shown, since the motor 18 is located on the rear side of the base 11, when its volume is large, to ensure assembly, the portion of the cover plate 14 corresponding to the motor 18 protrudes upwards, forming a protrusion 125, to increase the space for accommodating the motor 18. The protrusion 125 is provided with a second heat dissipation hole 12. At this time, when the projector 2 is fully retracted onto the gimbal 1, it can cover the front area of ​​its top except for the rear area where the protrusion 125 is located. When the motor 18 is small and can be a micro motor that can be arranged in the base 11, the cover plate 14 can be flat without the protrusion 125. When the area of ​​the base plate 22 of the projector 2 is not less than the area of ​​the gimbal base 11, the top of the gimbal 1 can be completely covered when the projector 2 is fully retracted onto the gimbal 1. Figure 1 As shown, at this time, a second heat dissipation hole 12 can be provided at the bottom or rear side of the base 11.

[0036] Therefore, in this embodiment, by placing the driving components of the gimbal 1 inside the base 11, and using the front baffle 23, side baffles 24, and cover 25 of the projector housing 21 to enclose and shield the front, left and right sides, and at least part of the top of the base 11 in the retracted state, a hidden integration of the gimbal structure is achieved. This design effectively reduces the visual hierarchy between the projector 2 and the gimbal 1, and enhances the overall integrated appearance and texture of the device.

[0037] In some embodiments, refer to Figure 3 and Figure 4 As shown, the gimbal 1 also includes a guide assembly, which includes rollers 126, guide rails 127, and connecting rods 128. Rollers 126 and guide rails 127 are provided on both the left and right sides of the base 11. A guide groove is provided on the inner side of the guide rail 127. The rollers 126 are connected to the base 11 and located in the guide groove. The guide rails 127 can move along the extension direction X on the rollers 126. A side baffle 24 is provided on the outer side of the guide rails 127. The connecting rods 128 are connected to the drive assembly, and the two ends of the connecting rods 128 are respectively connected to the guide rails 127 on both sides. The base plate 22 is connected to the guide rails 127 on both sides.

[0038] The base 11 is provided with rollers 126 and guide rails 127 on both the left and right sides. The guide rails 127 have guide grooves on their inner sides. Multiple rollers 126 can be provided, connected to the base 11 and located in the guide grooves, to ensure that the guide rails 127 can slide smoothly on the multiple rollers 126 in the extension direction X.

[0039] A side baffle 24 is provided on the outer side of the guide rail 127, which not only protects the internal mechanical components but also enhances the overall integrated appearance of the machine. It is understandable that... Figure 2 As shown, since the cover plate 14 has a protrusion 125, the side baffle 24 covers part of the front area of ​​the guide rail 127. Of course, the side baffle 24 can also be extended to cover the entire area of ​​the guide rail 127 as needed, such as... Figure 1 As shown.

[0040] The connecting rod 128, acting as a connector, can be connected to the slider 120 of the drive assembly, and its two ends are respectively connected to the guide rails 127 on both sides. In this way, the power generated by the drive assembly can be evenly transmitted to the guide rails 127 on both sides, ensuring synchronous movement on both sides and improving stability.

[0041] The base plate 22 is connected to the guide rails 127 on both sides and moves synchronously with the extension and retraction of the guide rails 127 on the rollers 126. Specifically, when the motor 18 rotates, it can drive the lead screw 19 to rotate, thereby driving the slider 120 to move along the lead screw 19, which in turn drives the connecting rod 128 to move. The connecting rod 128 transmits power to the guide rails 127 on both sides, causing the guide rails 127 to move on the corresponding rollers 126, which in turn drives the base plate 22 on the guide rails 127 to move, realizing the extension and retraction of the projection host 2 on the pan-tilt unit 1.

[0042] The present application embodiment can improve the stability of the projection host 2 when it moves by means of a guide component, and at the same time, the overall aesthetics are further improved by the shielding design of the side baffle 24.

[0043] In some examples, refer to Figure 4 and Figure 5 As shown, the guide assembly also includes a fixing rod 129. The fixing rod 129 and the connecting rod 128 are arranged side by side with a back-and-forth spacing along the telescopic direction X, and the two ends of the fixing rod 129 are respectively connected to the guide rails 127 on both sides. This design is used to improve the movement stability of the guide rails 127.

[0044] In some embodiments, refer to Figure 3 and Figure 4 As shown, each guide rail 127 is connected to the base plate 22 by two height adjustment components 130 arranged at intervals along the telescopic direction X. The height adjustment components 130 are located in the side baffles 24 of the corresponding guide rail 127 and are used to adjust the pitch angle of the base plate 22.

[0045] Each guide rail 127 is equipped with two height adjustment components 130, which are spaced apart along the telescopic direction X (front-to-back direction). Optionally, four height adjustment components 130 are connected to the four top corners of the base plate 22. The four height adjustment components 130 can be adjusted individually to control the height difference between the front and rear sides of the base plate 22, thereby adjusting the pitch angle of the projector 2 and ensuring projection quality.

[0046] The height adjustment assembly 130 can be an electric actuator, a screw and nut adjustment structure as described below, etc. For example, when the height adjustment assembly 130 is an electric actuator, the electric actuator is fixed on the guide rail 127, and the actuator rod can be hinged to the base plate 22. When it is necessary to adjust the pitch angle of the base plate 22, the rear height of the base plate 22 can be raised or lowered by the two electric actuators on the rear side, so that the rear side of the base plate 22 can be higher or lower than the front side, thereby realizing the pitch angle adjustment of the projection host 2.

[0047] Furthermore, the height adjustment component 130 is located inside the side baffle 24, which shields the internal components from external interference and improves the overall aesthetics.

[0048] Therefore, by embedding the height adjustment component 130 inside the side baffle 24, this embodiment of the application can achieve height adjustment of the front and rear sides of the base plate 22 while ensuring the overall aesthetics, thereby enabling precise control of the pitch angle of the projector host 2 and improving the quality of the projected image.

[0049] In some embodiments, refer to Figures 4 to 8 As shown, each guide rail 127 has a support portion 131 on its outer side, and the support portion 131 has a mounting hole 132. The height adjustment assembly 130 includes an elastic plug 133, a drive rod 134, and a locking nut 135. The elastic plug 133 includes a body 136 and a flange 137. The body 136 is located in the mounting hole 132, and the two ends of the body 136 are respectively provided with flanges 137. The flanges 137 at both ends are respectively clamped to the upper and lower sides of the mounting hole 132. The drive rod 134 includes a screw 138 and a knob 139. The screw 138 passes through the body 136 along the height direction Z. One end of the screw 138 is threaded to the base plate 22. The knob 139 is located in the middle of the screw 138 and is pressed against the upper flange 137. The locking nut 135 is connected to the other end of the screw 138 and is used to lock it against the lower flange 137.

[0050] Each guide rail 127 has a support portion 131 on its outer side. The support portion 131 can be a strip structure, and two height adjustment components 130 can be installed on one support portion 131; or, two support portions 131 can be installed on each side guide rail 127, and one height adjustment component 130 can be installed on each support portion 131. The support portion 131, as the load-bearing structure of the height adjustment component 130, is integrated into the side baffle 24 to achieve concealed assembly and ensure a neat appearance.

[0051] The elastic plug 133 may include an integrally formed body 136 and flanges 137 at both ends. The body 136 may be a hollow cylindrical structure. The body 136 is embedded in the mounting hole 132 of the support portion 131. The flanges 137 at both ends are respectively clamped on the upper and lower sides of the mounting hole 132 to prevent the elastic plug 133 from falling off during use. The elastic plug 133 has elastic deformation capability and can be compressed or stretched under force. The elastic plug 133 may be made of materials such as rubber or silicone.

[0052] Threaded posts 230 can be provided at the four corners of the base plate 22; the drive rod 134 can include an integrally formed screw 138 and a knob 139. The screw 138 passes through the elastic plug body 136 along the height direction Z, and its upper end is threadedly connected to the threaded post 230 on the base plate 22; the knob 139 is located in the middle of the screw 138 and is tightly pressed onto the upper flange 137 under the gravity of the projection host 2. When the knob 139 is turned, the threaded post 230 can move on the screw 138.

[0053] The locking nut 135 is installed at the lower end of the screw 138. After the height of the base plate 22 is adjusted, tightening the locking nut 135 can fix the entire drive rod 134 structure and prevent it from moving.

[0054] When adjusting the pitch, the locking nuts 135 of the two height adjustment components located on the rear side of the base plate 22 can be loosened, and the knob 139 can be turned to rotate the screw 138. Since the screw 138 is threadedly connected to the threaded post 230 on the base plate 22, and is subjected to the gravity of the projector 2, the screw 138 is pressed against the upper flange 137 through the knob 139, and the relative position remains unchanged. This converts the rotation of the screw 138 into the axial lifting and lowering movement of the base plate 22, causing the rear side of the base plate 22 to rise or fall. When the heights of the front and rear sides of the base plate 22 are inconsistent, a pitch tilt is formed, achieving precise adjustment of the projection angle. During the adjustment process, since the elastic plug 133 separates the knob 139 and the locking nut 135 from the support part 131, it provides a certain elastic space. The elastic plug 133 can deform, thereby allowing the base plate 22 to tilt. After adjustment, tighten the locking nut 135 to press it against the lower flange 137 and fix the position of the screw 138 to ensure that the projector host 2 maintains a stable posture during operation.

[0055] Therefore, the height adjustment component 130 used in this embodiment can achieve the pitch adjustment of the projection host 2 by turning the knob 139 and locking the nut 135, which is convenient to use.

[0056] In some embodiments, refer to Figure 7 As shown, the surface of the flange 137 away from the main body 136 is an arc-shaped curved surface 140, which is used to improve the pitch and tilt capability of the projection host 2.

[0057] In some embodiments, refer to Figure 6 As shown, the height adjustment assembly 130 also includes a first shim 141, which is disposed between the knob 139 and the upper flange 137, and the projected area of ​​the first shim 141 on the knob 139 is smaller than the projected area of ​​the upper flange 137 on the knob 139.

[0058] like Figure 8 As shown, the first shim 141 can be integrally formed on the bottom of the knob 139. By adding the first shim 141 between the knob 139 and the upper flange 137, and the small projected area of ​​the shim, the space between the knob 139 and the support 131 can be increased, which facilitates pitch and tilt, improves the flexibility of pitch adjustment, and makes the angle adjustment smoother.

[0059] In some embodiments, refer to Figure 6As shown, the height adjustment assembly 130 also includes a second washer 142, which is disposed between the locking nut 135 and the lower flange 137, and the projected area of ​​the second washer 142 on the locking nut 135 is smaller than the projected area of ​​the lower flange 137 on the locking nut 135.

[0060] The second washer 142 can be integrally formed on the top of the locking nut 135. By adding the second washer 142 between the locking nut 135 and the lower flange 137, and the washer has a small projected area, the space between the locking nut 135 and the support part 131 can be increased, which facilitates pitch and tilt, improves the flexibility of pitch adjustment, makes the angle adjustment smoother, and ensures the locking effect.

[0061] In some embodiments, refer to Figure 2 As shown, the side baffle 24 is provided with a window 29, which is correspondingly set with the height adjustment component 130 and is used to adjust the knob 139 and the locking nut 135.

[0062] This design allows users to easily operate the knob 139 and locking nut 135 directly through window 29 to adjust the height of the base plate 22 and achieve pitch angle adjustment.

[0063] Furthermore, a cover (not shown in the figure) can be installed on window 29, which can open or close window 29. The cover can be hinged to the front edge of window 29, and a buckle can be installed on the rear edge of window 29. A retaining ring can be installed on the rear edge of the cover away from the hinge side. When the cover closes window 29, the retaining ring engages with the buckle.

[0064] When no tilt adjustment is needed, the cover is closed, preventing dust and debris from entering the interior, protecting the height adjustment component 130 from external environmental influences, and improving aesthetics. When tilt adjustment is required, the cover is opened, and the knob 139 and locking nut 135 are directly accessed through the window 29 to adjust the tilt angle of the projector 2, improving user convenience.

[0065] Understandably, in Figure 2 The front window 29 shown is formed by joining the end notches of the front baffle 23 and the side baffle 24. Of course, the window 29 can also be directly opened on the side baffle 24.

[0066] In some embodiments, the base plate 22 is detachably connected to the front baffle 23, the rear baffle 28 and the side baffle 24 respectively, and the cover 25 is detachably connected to the base plate 22, the front baffle 23, the rear baffle 28 and the side baffle 24 respectively.

[0067] The various parts of the housing 21 of the projector 2 can be connected by means of snap-fit, screw connection, etc. For example, when the base plate 22 is connected to the side baffle 24, the edge of the base plate 22 can be provided with a positioning slot, a snap-fit ​​groove and a screw hole, and the side baffle 24 can be provided with a positioning protrusion, a snap-fit ​​and a screw hole respectively. During connection, the positioning protrusion can be connected to the positioning slot to achieve positioning, then the snap-fit ​​is pushed into the snap-fit ​​groove to achieve pre-fixing, and finally the side baffle 24 is fixed to the base plate 22 by screws passing through the screw holes.

[0068] This embodiment of the application makes the housing 21 of the projector host 2 a detachable structure, which facilitates the maintenance of the internal gimbal 1, and allows for modular production of the various components of the housing 21 using injection molding. When a single component is damaged (such as a scratch on the side panel 24), it is not necessary to replace the entire housing 21; only the corresponding module needs to be replaced, thus reducing costs. In addition, the cover 25, front panel 23, rear panel 28, and side panel 24 can be made of different colors, materials, or markings to serve a decorative purpose and achieve a personalized appearance.

[0069] The above are merely preferred embodiments of this application and are not intended to limit the embodiments of this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A projection device, characterized by include: Gimbal; A projection host includes a housing, which includes a base plate, a front baffle, two side baffles, and a cover. The base plate is mounted on a pan-tilt unit, which drives the base plate to extend and retract. The front baffle is connected to the front side of the base plate along the extension direction. The two side baffles are respectively connected to the left and right sides of the base plate along a first direction, and the front baffle and side baffles surround the corresponding sides of the pan-tilt unit. The cover covers the base plate, the front baffle, and the side baffles. Wherein, the first direction is perpendicular to the extension direction.

2. The projection apparatus according to claim 1, wherein The gimbal includes a base and a drive assembly. The base is provided with the bottom plate, and the drive assembly is located inside the base and connected to the bottom plate. The front baffle and the side baffle surround the corresponding sides of the base.

3. The projection apparatus according to claim 2, wherein The gimbal also includes a guide assembly, which includes rollers, guide rails, and connecting rods. Rollers and guide rails are provided on both the left and right sides of the base. A guide groove is provided on the inner side of the guide rail. The rollers are connected to the base and located within the guide grooves. The guide rails are capable of moving along the extension / retraction direction on the rollers. Side baffles are provided on the outer side of the guide rails. The connecting rod is connected to the drive assembly, and both ends of the connecting rod are respectively connected to the guide rails on both sides. The base plate is connected to the guide rails on both sides.

4. The projection device according to claim 3, characterized in that, Each of the guide rails is connected to the base plate via two height adjustment components spaced apart along the telescopic direction. The height adjustment components are located inside the side baffles corresponding to the guide rails and are used to adjust the pitch angle of the base plate.

5. The projection device according to claim 4, characterized in that, Each of the guide rails has a support portion on its outer side, and the support portion has a mounting hole; The height adjustment assembly includes an elastic plug, a drive rod, and a locking nut. The elastic plug includes a body and a flange. The body is disposed in the mounting hole. The flanges are respectively provided on both ends of the body. The flanges at both ends are respectively clamped on the upper and lower sides of the mounting hole. The drive rod includes a screw and a knob. The screw passes through the body along the height direction. One end of the screw is threaded to the base plate. The knob is located in the middle of the screw and is pressed against the upper flange. The locking nut is connected to the other end of the screw and is used to lock it against the lower flange.

6. The projection device according to claim 5, characterized in that, The surface of the flange away from the main body is an arc-shaped curved surface.

7. The projection device according to claim 5, characterized in that, The height adjustment assembly further includes a first shim, which is disposed between the knob and the upper flange, and the projected area of ​​the first shim on the knob is smaller than the projected area of ​​the upper flange on the knob.

8. The projection device according to claim 5, characterized in that, The height adjustment assembly further includes a second shim, which is disposed between the locking nut and the lower flange, and the projected area of ​​the second shim on the locking nut is smaller than the projected area of ​​the lower flange on the locking nut.

9. The projection device according to claim 5, characterized in that, The side panel is provided with a window, which is correspondingly set with the height adjustment component and is used to adjust the knob and the locking nut.

10. The projection device according to any one of claims 1 to 9, characterized in that, The base plate is detachably connected to the front baffle and the side baffle, and the cover is detachably connected to the base plate, the front baffle and the side baffle.

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