Supporting device and single-supporting-leg projector

Abstract

The invention belongs to the technical field of projectors, and discloses a supporting device and a single-supporting-foot projector, the supporting device comprises a shell and a supporting assembly, the shell comprises an upper shell and a lower shell, the upper shell is provided with a supporting arm and a chassis, the supporting arm is provided with a mounting groove, the bottom end of the supporting arm is connected with the chassis, the chassis is detachably connected with the lower shell, and the supporting assembly is arranged in the mounting groove. The upper shell is provided with a first clamping groove; the supporting assembly comprises a rigid part, a locking part, a rotating shaft and a plurality of first screws, the locking part is limited in the mounting groove, the rotating shaft is fixed to the locking part, the rigid part is limited in the first clamping groove, and the heads of the first screws abut against the rigid part. By arranging the rigid member, the gravity of the whole projection is basically supported by the rigid member, so that the stable rotation of the projector is ensured, the structure of the supporting device is simplified, the size of the supporting device is reduced, the production cost is saved, and storage and transportation are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of projectors, and in particular to a supporting device and a single-leg projector. Background Art

[0002] In order to facilitate projection, existing projectors have begun to use a pan-tilt support structure to install the projector, so that the projector can rotate 180° (or more) relative to the pan-tilt. However, due to the weight restrictions of various systems such as optical components and control components in the projector, the overall weight of the projector is relatively large compared to the pan-tilt. Therefore, the pan-tilt is usually equipped with two support arms, each of which is equipped with a shaft connected to the projector, so as to disperse the weight of the projector and ensure the rotation stability of the projector. However, the double-support pan-tilt is large in size, not only has a high cost, but is also inconvenient to store and transport. Summary of the invention

[0003] The object of the present invention is to provide a supporting device that can stably support a projector with only one supporting arm, avoid shaking of a single leg, ensure support stability, save costs, and facilitate storage and transportation.

[0004] To achieve this object, the present invention adopts the following technical scheme: a supporting device, including an outer shell and a supporting assembly, the outer shell including an upper shell and a lower shell, the upper shell is provided with a vertical supporting arm and a horizontal chassis, a mounting groove is provided on one side of the top of the supporting arm, and an openable and closable operating port is provided on the other side, the bottom end of the supporting arm is connected to the chassis, the chassis is detachably connected to the lower shell, two first card slots are provided on the side of the upper shell away from the mounting groove, and the first card slots extend to the chassis; the supporting assembly includes two rigid parts, a locking part, a rotating shaft and a plurality of first screws, the locking part is limited to the mounting groove, the rotating shaft is fixed to the locking part and protrudes from the supporting arm in the horizontal direction, the rigid part is L-shaped, the two rigid parts are symmetrically arranged and correspondingly limited to the first card slots, the plurality of first screws are symmetrically arranged and are all connected to the locking part, and the heads of the symmetrical plurality of first screws are respectively abutted against the two rigid parts.

[0005] Preferably, the bottom wall of the first slot is provided with a through portion communicating with the mounting slot, and the rigid member abuts against the locking member through the through portion.

[0006] Preferably, a washer is provided between the first screw and the rigid member, the washer is sleeved on the first screw, and two sides of the washer are respectively in contact with the rigid member and the head of the first screw.

[0007] Preferably, the upper shell is connected to two limit assemblies, the limit assemblies are arranged in one-to-one correspondence with the first card slots, the limit assemblies include a plurality of second screws, the plurality of second screws are arranged at intervals along the arrangement direction of the first card slots, and the heads of the second screws abut against the rigid member.

[0008] Preferably, the bottom wall of the mounting groove is provided with a stepped hole, the inner wall of the stepped hole is provided with a positioning step, an annular groove is formed between the locking piece, the positioning step and the inner wall of the stepped hole, the rotating shaft is provided with an annular protrusion, and the protrusion is limited in the annular groove.

[0009] Preferably, the supporting device further comprises a control circuit, wherein the control circuit is installed in the housing and located below the rotating shaft, the control circuit is provided with a control line, and the rotating shaft is provided with a through hole for the control line to pass through.

[0010] Preferably, a wire harness clamp is provided on a side of the support arm facing away from the mounting slot, and the wire harness clamp is located between the rotating shaft and the control circuit to limit the control wire.

[0011] Preferably, a blocking portion is provided on a side of the support arm facing away from the operating port, the blocking portion is arranged around the mounting groove and protrudes from the support arm, and the rotating shaft protrudes from the blocking portion in a horizontal direction.

[0012] Preferably, the upper shell includes a cover plate, and the cover plate is detachably connected to the support arm to close the operation port.

[0013] Another object of the present invention is to provide a single-leg projector that can simplify the projector structure, reduce the projector volume, and facilitate the use and storage of the projector.

[0014] To achieve this object, the present invention adopts the following technical scheme: a single-leg projector, including a projector body and the above-mentioned supporting device, the projector body is provided with a socket, a nut is provided in the socket, the inner wall of the projector body is provided with a connecting plate, and the outer wall is provided with a turntable, the turntable and the connecting plate are respectively located on both sides of the socket and are bolted together, the turntable is sleeved on the rotating shaft, and the end of the rotating shaft away from the chassis extends into the socket and is threadedly connected to the nut.

[0015] Advantages of the present invention: By providing a rigid member, the locking member fixed to the rotating shaft is rigidly connected to the rigid member through a first screw. When the projector rotatably connected to the rotating shaft rotates relative to the rotating shaft, the torque applied to the rotating shaft is first transmitted to the locking member and then to the rigid member through the first screw, so that the gravity of the entire projector is basically supported by the rigid member. Compared with the traditional plastic structure for supporting the rotating shaft, the rigid member has higher strength and better supporting performance, and can bear and disperse most of the torque pressure received by the rotating shaft, enabling the supporting device to stably support a projector with a large weight by only a single support arm and a single rotating shaft. While ensuring the stable rotation of the projector, the structure of the supporting device is simplified, the volume of the supporting device is reduced, the production cost is saved, and it is convenient for storage and transportation.

[0016] The present invention also provides a single-foot projector. By providing a nut and a connecting plate, the turntable is limited and fixed on the rotating shaft, and the weight of the projector body is applied to the rotating shaft through the turntable and then dispersed to the rigid member, which can ensure the stable rotation of the projector body. The projector body can be stably supported by only one supporting device, which can simplify the structure of the projector, reduce the volume of the projector, and facilitate the use, storage and transportation of the projector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the supporting device according to an embodiment of the present invention;

[0018] Figure 2 is an exploded view of the supporting device according to an embodiment of the present invention;

[0019] Figure 3 is an installation schematic diagram of the rigid member according to an embodiment of the present invention;

[0020] Figure 4 is a schematic structural diagram of the upper housing according to an embodiment of the present invention;

[0021] Figure 5 is a cross-sectional view of the supporting device according to an embodiment of the present invention;

[0022] Figure 6 is a schematic structural diagram of the single-foot projector according to an embodiment of the present invention.

[0023] In the figure:

[0024] 1000, supporting device;

[0025] 100, housing; 110, upper housing; 111, support arm; 1111, installation groove; 1112, operation port; 1113, stepped hole; 1114, wire harness clip; 1115, enclosure part; 112, chassis; 113, first card slot; 1131, through part; 114, first screw hole; 115, limiting component; 1151, second screw; 116, cover plate; 117, second screw hole; 118, second card slot; 120, lower housing;

[0026] 200, Support component; 210, Rigid member; 220, Locking member; 230, Rotating shaft; 231, Protrusion; 240, First screw; 241, Washer;

[0027] 300, Control circuit;

[0028] 2000, Single-leg projector;

[0029] 400, Projector main body; 410, Socket; 411, Nut; 420, Connecting plate; 430, Turntable; 440, Bushing. Detailed implementation manner

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0031] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0033] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0034] Referring to Figures 1 to 5 As shown, a support device 1000 provided according to an embodiment of the present application includes a housing 100 and a support assembly 200. The housing 100 includes an upper housing 110 and a lower housing 120. The upper housing 110 is provided with a vertical support arm 111 and a horizontal chassis 112. Both the support arm 111 and the chassis 112 are flat rectangles. The support arm 111 is a hollow shell structure inside. On one side of the top end of the support arm 111, there is an installation groove 1111, and on the other side, there is an operable opening 1112 that can be opened and closed. The operable opening 1112 communicates with the internal space of the support arm 111. Inside the operable opening 1112, there are a plurality of first screw holes 114, and the plurality of first screw holes 114 are symmetrically arranged on both sides of the installation groove 1111. The bottom end of the support arm 111 is connected to the chassis 112, and the connection between the support arm 111 and the chassis 112 is transitioned by a rounded corner. The chassis 112 is detachably connected to the lower housing 120. On the side of the upper housing 110 facing away from the installation groove 1111, there are two first card slots 113, and the first card slots 113 extend to the chassis 112. Specifically, the first card slot 113 is L-shaped. The vertical part of the L-shaped first card slot 113 is arranged on the side of the support arm 111 facing away from the installation groove 1111, and the horizontal part of the L-shaped first card slot 113 is arranged on the side of the chassis 112 facing the second housing.

[0035] The support assembly 200 includes two rigid members 210, a locking member 220, a rotating shaft 230, and a plurality of first screws 240. The locking member 220 is limited in the installation groove 1111, and the rotating shaft 230 is fixed to the locking member 220 and protrudes horizontally from the support arm 111. Specifically, the locking member 220 is a disc-shaped structure sleeved on the outer peripheral wall of the rotating shaft 230. The rotating shaft 230 is used to support projection and lighting devices such as projectors or spotlights. Hereinafter, the projector is taken as an example for description. The rigid member 210 is L-shaped. The two rigid members 210 are symmetrically arranged with respect to a vertical plane passing through the axis of the rotating shaft 230 and are correspondingly limited in the first card slots 113. The first screws 240 are correspondingly installed in the first screw holes 114. The plurality of first screws 240 are symmetrically arranged and are all connected to the locking member 220. The heads of the symmetrically arranged plurality of first screws 240 are respectively abutted against the two rigid members 210. Optionally, a cutting plane can be provided on the outer peripheral wall of the rotating shaft 230 so that the locking member 220 will not rotate when sleeved on the rotating shaft 230, ensuring the connection tightness between the locking member 220 and the rotating shaft 230. The rigid member 210 can be made of materials such as copper, iron, alloy steel, or high-strength plastic, which will not be elaborated here.

[0036] It can be understood that by setting the rigid member 210, the locking member 220 fixed to the rotating shaft 230 is rigidly connected to the rigid member 210 through the first screw 240. When the projector rotatably connected to the rotating shaft 230 rotates relative to the rotating shaft 230, the torque applied to the rotating shaft 230 is first transmitted to the locking member 220 and then transmitted to the rigid member 210 through the first screw 240, so that the gravity of the entire projector is basically supported by the rigid member 210. Compared with the traditional plastic structure for supporting the rotating shaft 230, the rigid member 210 has higher strength and better supporting performance, and can bear and disperse most of the torque pressure received by the rotating shaft 230, enabling the supporting device 1000 to stably support a projector with a large weight by only a single support arm 111 and a single rotating shaft 230. While ensuring the stable rotation of the projector, the structure of the supporting device 1000 is simplified, the volume of the supporting device 1000 is reduced, the production cost is saved, and it is convenient for storage and transportation.

[0037] Referring to Figure 2 and Figure 3 As shown, it can be understood that a washer 241 is provided between the first screw 240 and the rigid member 210. The outer diameter of the washer 241 is larger than the outer diameter of the head of the first screw 240. The washer 241 is sleeved on the first screw 240, and both sides of the washer 241 are in contact with the rigid member 210 and the head of the first screw 240 respectively.

[0038] By setting the washer 241, the contact area between the first screw 240 and the rigid member 210 can be increased, buffering can be enhanced, the torque pressure transmitted from the rotating shaft 230 to the rigid member 210 can be further dispersed, stress concentration can be avoided, and the tightness and stability of the connection between the first screw 240 and the rigid member 210 can be improved.

[0039] Furthermore, two limiting components 115 are connected to the upper housing 110. The limiting components 115 are arranged in one-to-one correspondence with the first card slots 113. The limiting components 115 include a plurality of second screws 1151. The upper housing 110 is provided with a plurality of second screw holes 117. The second screws 1151 are arranged in one-to-one correspondence with the second screw holes 117. The plurality of second screws 1151 are arranged at intervals along the arrangement direction of the first card slot 113, and the heads of the second screws 1151 are in contact with the rigid member 210.

[0040] By setting the limiting components 115, the plurality of second screws 1151 of the limiting components 115 can limit the rigid member 210 along the depth direction of the first card slot 113, preventing the part of the rigid member 210 away from the rotating shaft 230 from disengaging or shifting from the second card slot 118, and effectively improving the installation stability of the rigid member 210.

[0041] Optionally, in other embodiments, the limiting assembly 115 may be replaced by a plurality of limiting block structures spaced apart along the arrangement direction of the first slot 113 , which may also have a limiting effect similar to that of the first screw 240 , which will not be elaborated herein.

[0042] Reference Figure 3 and Figure 4 As shown, it can be understood that the bottom wall of the first card slot 113 is provided with a through portion 1131 connected to the installation slot 1111, and the through portion 1131 penetrates the upper shell 110 along the wall thickness direction of the upper shell 110, and the rigid member 210 abuts against the locking member 220 through the through portion 1131.

[0043] By setting the through portion 1131, the rigid component 210 located on the side of the upper shell 110 away from the installation groove 1111 can directly abut against the locking component 220. At this time, the locking component 220 and the head of the first screw 240 clamp the rigid component 210 from both sides of the rigid component 210, so that part of the torque pressure exerted on the locking component 220 can be directly transmitted to the rigid component 210, and the pressure originally borne by part of the wall of the first screw hole 114 is directly transmitted to the rigid component 210, thereby further enhancing the supporting stability of the supporting device 1000.

[0044] Reference Figure 4 and Figure 5 As shown, it can be understood that the bottom wall of the mounting groove 1111 is provided with a stepped hole 1113, the inner wall of the stepped hole 1113 is provided with a positioning step, an annular groove is formed between the locking piece 220, the positioning step and the inner wall of the stepped hole 1113, and the rotating shaft 230 is provided with an annular protrusion 231, and the protrusion 231 is limited in the annular groove.

[0045] By setting the stepped hole 1113 and the protrusion 231, the protrusion 231 is limited in the annular groove formed by the stepped hole 1113 and the locking member 220, so that the rotating shaft 230 can be axially limited, effectively improving the installation stability of the rotating shaft 230 and indirectly improving the supporting strength of the rotating shaft 230.

[0046] Reference Figure 2 and Figure 5 As shown, it can be understood that the support device 1000 also includes a control circuit 300, which is installed in the housing 100 and located below the rotating shaft 230. Specifically, a second card slot 118 is provided on the side of the upper housing 110 away from the mounting slot 1111, and the control circuit 300 is limited in the second card slot 118. The control circuit 300 is provided with a control line, and the rotating shaft 230 is provided with a through hole for the control line to pass through. Optionally, the control circuit 300 is also provided with structures such as a control switch and a power interface, and the outer wall of the upper housing 110 is provided with a button corresponding to the control switch, an opening corresponding to the power interface, etc., which will not be repeated here.

[0047] By providing a control circuit 300, the control line of the control circuit 300 can pass through the stepped hole 1113 and the through hole of the rotating shaft 230 into the interior of the projector and be connected to the control system of the projector, simplifying the internal structure of the projector, enabling control of the projector on the support device 1000, improving the controllability of the support device 1000, and effectively enhancing the user experience.

[0048] Referring to Figure 5 as shown, it can be understood that the upper housing 110 includes a cover plate 116, and the cover plate 116 is detachably connected to the support arm 111 to close the operation port 1112. Optionally, the cover plate 116 and the upper housing 110 can be connected through structural components such as plug and socket, snap and groove, bolt and screw hole, or a combination of the above structures, which will not be elaborated here.

[0049] The installation steps of the support device 1000 are as follows: First, the user inserts the rigid member 210 and the control circuit 300 from below the chassis 112 into the first card slot 113 and the second card slot 118 in sequence from bottom to top. Then, the user installs the first screw 240 and the second screw 1151 in sequence. Next, the user installs the lower housing 120 and the cover plate 116 in sequence to complete the installation and formation of the support device 1000.

[0050] By providing a detachable cover body, when the user opens the cover plate 116, the rigid member 210, the first screw 240, and the control circuit 300 inside the housing 100 can be exposed in the operation port 1112, facilitating the user to install and maintain the rigid member 210, the first screw 240, and the control circuit 300, improving the loading and unloading convenience of the support device 1000, and reducing the later maintenance cost of the support device 1000.

[0051] Continuing to refer to Figure 4 and Figure 5 as shown, it can be understood that a wire harness clip 1114 is provided on the side of the support arm 111 facing away from the installation groove 1111, and the wire harness clip 1114 is located between the rotating shaft 230 and the control circuit 300 to limit the control line.

[0052] By providing the wire harness clip 1114, the wire harness clip 1114 can clamp and limit the control line extending from the control circuit 300 to the through hole on the rotating shaft 230, preventing the control line from being scattered and wound inside the housing 100, facilitating the user to connect the wires, and further improving the loading and unloading convenience of the support device 1000.

[0053] Continuing to refer to Figure 3 and Figure 5 as shown, it can be understood that a surrounding portion 1115 is provided on the side of the support arm 111 facing away from the operation port 1112. The surrounding portion 1115 is arranged around the installation groove 1111 and protrudes from the support arm 111, and the rotating shaft 230 protrudes horizontally from the surrounding portion 1115.

[0054] By providing the enclosing part 1115, after the support device 1000 is connected to a projector (or a spotlight, etc.), the enclosing part 1115 can block and hide the connection part between the support device 1000 and the projector, preventing external impurities from eroding the gap between the rotating shaft 230 and the projector and affecting the rotation of the projector, thus effectively extending the service life of the support device 1000.

[0055] Refer to Figure 6 As shown, a single-leg projector 2000 provided according to an embodiment of the present application includes a projector main body 400 and the above-mentioned support device 1000. The projector main body 400 is provided with a socket 410, a nut 411 is arranged in the socket 410, a connecting plate 420 is arranged on the inner side wall of the projector main body 400, the connecting plate 420 is in plug-in fit, and a turntable 430 is arranged on the outer side wall. The turntable 430 and the connecting plate 420 are located on both sides of the socket 410 and are bolted. The turntable 430 is sleeved on the rotating shaft 230, and one end of the rotating shaft 230 away from the chassis 112 extends into the socket 410 and is threadedly connected to the nut 411.

[0056] The connection steps of the projector main body 400 and the support device 1000 are as follows: First, limit and place the turntable 430 on the outer side wall of the socket 410, insert the end of the rotating shaft 230 sleeved with the locking member 220 into the jack, then connect the nut 411 to the end of the rotating shaft 230, then insert the connecting plate 420 into the projector, then bolt-connect the turntable 430 and the connecting plate 420, then place the locking member 220 into the installation groove 1111 of the support arm 111, and then lock the first nut 411 and install the cover plate 116 to realize the connection of the projector main body 400 and the support device 1000.

[0057] It can be understood that by providing the nut 411 and the connecting plate 420, the turntable 430 is limited and fixed on the rotating shaft 230, and the weight of the projector main body 400 is applied to the rotating shaft 230 through the turntable 430 and then distributed to the rigid member 210, which can ensure the stable rotation of the projector main body 400. Only one support device 1000 can stably support the projector main body 400, which can simplify the structure of the projector, reduce the volume of the projector, and facilitate the use and storage of the projector.

[0058] Furthermore, a bushing can be arranged between the turntable 430 and the bottom wall of the installation groove 1111 to limit the turntable 430 and improve the positioning accuracy of the rotating shaft 230. A spring washer can be arranged between the nut 411 and the inner side wall of the projector main body 400 to improve the installation stability of the nut 411.

[0059] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A supporting device, characterized in that: include: A housing (100) comprises an upper housing (110) and a lower housing (120), wherein the upper housing (110) is provided with a vertical support arm (111) and a horizontal chassis (112), a mounting groove (1111) is provided on one side of the top end of the support arm (111), and an openable and closable operating port (1112) is provided on the other side, the bottom end of the support arm (111) is connected to the chassis (112), the chassis (112) is detachably connected to the lower housing (120), and two first card slots (113) are provided on a side of the upper housing (110) away from the mounting groove (1111), and the first card slots (113) extend to the chassis (112); A support assembly (200) comprises two rigid members (210), a locking member (220), a rotating shaft (230) and a plurality of first screws (240); the locking member (220) is limited in the installation groove (1111); the rotating shaft (230) is fixed to the locking member (220) and protrudes from the support arm (111) in the horizontal direction; the rigid member (210) is L-shaped; the two rigid members (210) are symmetrically arranged and correspondingly limited in the first slot (113); the plurality of first screws (240) are symmetrically arranged and are all connected to the locking member (220); and the heads of the symmetrical plurality of first screws (240) are respectively in contact with the two rigid members (210).

2. The support device according to claim 1, characterized in that: The bottom wall of the first clamping slot (113) is provided with a through portion (1131) communicating with the mounting slot (1111), and the rigid member (210) abuts against the locking member (220) via the through portion (1131).

3. The supporting device according to claim 1, characterized in that: A washer (241) is provided between the first screw (240) and the rigid member (210), and the washer (241) is sleeved on the first screw (240). Two sides of the washer (241) are respectively in contact with the rigid member (210) and the head of the first screw (240).

4. The supporting device according to claim 1, characterized in that: The upper shell (110) is connected to two limit assemblies (115), and the limit assemblies (115) are arranged in a one-to-one correspondence with the first slots (113). The limit assemblies (115) include a plurality of second screws (1151), and the plurality of second screws (1151) are arranged at intervals along the arrangement direction of the first slots (113), and the heads of the second screws (1151) abut against the rigid member (210).

5. The supporting device according to claim 1, characterized in that: The bottom wall of the mounting groove (1111) is provided with a stepped hole (1113), the inner wall of the stepped hole (1113) is provided with a positioning step, an annular groove is formed between the locking member (220), the positioning step and the inner wall of the stepped hole (1113), and the rotating shaft (230) is provided with an annular protrusion (231), and the protrusion (231) is limited in the annular groove.

6. The supporting device according to claim 5, characterized in that: The supporting device further comprises a control circuit (300), wherein the control circuit (300) is installed in the housing (100) and is located below the rotating shaft (230), the control circuit (300) is provided with a control line, and the rotating shaft (230) is provided with a through hole for the control line to pass through.

7. The supporting device according to claim 6, characterized in that: A wire harness clamp (1114) is provided on a side of the support arm (111) facing away from the mounting groove (1111), and the wire harness clamp (1114) is located between the rotating shaft (230) and the control circuit (300) to limit the control wire.

8. The supporting device according to claim 1, characterized in that: A blocking portion (1115) is provided on a side of the support arm (111) facing away from the operating port (1112); the blocking portion (1115) is arranged around the mounting groove (1111) and protrudes from the support arm (111); and the rotating shaft (230) protrudes from the blocking portion (1115) in a horizontal direction.

9. The supporting device according to claim 1, characterized in that: The upper shell (110) comprises a cover plate (116), and the cover plate (116) is detachably connected to the support arm (111) to close the operation port (1112).

10. Single-leg projector, characterized in that: The projector body (400) comprises a supporting device as claimed in any one of claims 1 to 9, wherein the projector body (400) is provided with a socket (410), a nut (411) is provided in the socket (410), a connecting plate (420) is provided on the inner wall of the projector body (400), and a turntable (430) is provided on the outer wall, the turntable (430) and the connecting plate (420) are respectively located on both sides of the socket (410) and are bolted together, the turntable (430) is sleeved on the rotating shaft (230), and one end of the rotating shaft (230) away from the chassis (112) extends into the socket (410) and is threadedly connected to the nut (411).

Images