Supporting device

Abstract

A supporting device comprises a support unit suitable for being installed on a table top, a cantilever unit connected to the support unit and capable of swinging relative to the support unit, and a telescopic unit connected to the cantilever unit and the support unit. The cantilever unit is suitable for being connected with a microphone. The telescopic unit comprises a telescopic elastic element and at least one rolling element which can be rotatably installed on the elastic element. And the rolling element can slide on the cantilever unit in the stretching and retracting process of the elastic element. Therefore, through the rolling property of the at least one rolling piece, not only can the collimation property of the elastic element in the stretching and retracting process be supported and maintained, but also the friction resistance of the elastic element in the stretching and retracting process can be reduced, and further the smoothness of the cantilever unit in the swinging process is improved.

Description

Technical Field

[0001] The invention relates to a supporting device, in particular to a supporting device for a microphone. Background Art

[0002] See also Figure 1 A known cantilever bracket 1 disclosed in Chinese Patent Publication No. CN217356185 comprises a base 11, a lower arm 12 swingably connected to the base 11, an upper arm 13 swingably connected to the lower arm 12 and suitable for connecting a microphone (not shown), and a booster (not shown) mounted on the lower arm 12. The booster has a piston capable of bearing a load.

[0003] However, since the length of the piston will expand and contract in accordance with the swing angle of the upper arm 13, when the piston is long and partially suspended, it is easy to bend and deform due to the aforementioned angle change and bearing capacity. This will not only affect the alignment of the piston, increase the resistance when the piston moves, but also cause the upper arm to swing unsmoothly. Summary of the invention

[0004] The object of the present invention is to provide a supporting device capable of improving the smoothness of swinging.

[0005] The supporting device of the present invention comprises a bracket unit, a cantilever unit, and a telescopic unit.

[0006] The cantilever unit includes a swing cantilever connected to the bracket unit and can swing relative to the bracket unit along a first axis.

[0007] The telescopic unit extends along its own length direction and is connected to the cantilever unit and the bracket unit, the shaft seat has a first blocking surface extending toward the swing cantilever and along the direction of the second axis, and two second blocking surfaces extending along the direction of the first axis and opposite to the first blocking surface, the swing cantilever has a first abutting surface facing the shaft seat, and two second abutting surfaces formed on the inner surface and facing the shaft seat, the cantilever unit can swing between an upper limit position and a lower limit position relative to the bracket unit along the direction of the first axis, when at the upper limit position, the first abutting surface is blocked by the first blocking surface, and when at the lower limit position, the second abutting surface is blocked by the second blocking surface, the telescopic unit includes an elastic element that can be telescoped along the length direction, and at least one rolling element rotatably mounted on the elastic element, the rolling element can slide on the cantilever unit along the length direction during the telescoping of the elastic element.

[0008] The supporting device described in the present invention also includes an adjustment unit, which includes a movable seat that can move relative to the shaft seat along the direction of the first axis, and a damping adjustment member that can be operated and used to drive the movable seat. The telescopic unit also includes a linkage member pivotally connected to the elastic element and the movable seat.

[0009] In the support device described in the present invention, the movable seat can move between a high load position and a low load position relative to the shaft seat along the direction of the first axis. In the high load position, the elastic element defines a first length along the length direction, and the linking member and the elastic element clamp a first working angle. In the low load position, the elastic element defines a second length along the length direction, and the second length>the first length, and the linking member and the elastic element clamp a second working angle, and the second working angle>the first working angle. The damping adjustment member is rotatably inserted into the shaft seat along the direction of the first axis and screwed to the movable seat.

[0010] The supporting device described in the present invention also includes a pre-stressing unit, wherein the cantilever unit includes a swinging cantilever connected to the bracket unit and capable of swinging around a second axis substantially perpendicular to the first axis, and a base connected to the swinging cantilever and defining an installation space with the swinging cantilever. The pre-stressing unit is connected to the swinging cantilever and includes a pressing seat capable of compressing the elastic element, and a pre-stressing adjustment member capable of being operated and used to drive the pressing seat.

[0011] The support device described in the present invention, the telescopic unit is arranged in the installation space, and also includes a limit seat connected to the elastic element, the limit seat has at least one inclined surface facing the pressure seat, the pressure seat has a reverse inclined surface group matching with the at least one inclined surface and abutting against the at least one inclined surface, the pre-stressing adjustment member passes through the pressure seat along the direction of the first axis and is screwed to the swing cantilever, in the process of the pre-stressing adjustment member being screwed toward the swing cantilever along the direction of the first axis, the pre-stressing adjustment member pushes the pressure seat to move relative to the swing cantilever along the direction of the first axis, and in the process of the pressure seat moving, the limit seat is pushed to compress the elastic element along the length direction.

[0012] In the support device described in the present invention, the cantilever unit can also rotate around the first axis, and can swing along the direction of the first axis relative to the bracket unit between an upper limit position and a lower limit position. When in the upper limit position, the cantilever unit and the first axis include an upper limit angle of 10 degrees to 30 degrees, and when in the lower limit position, the cantilever unit and the first axis include a lower limit angle of 130 degrees to 150 degrees.

[0013] The support device described in the present invention, the cantilever unit includes a swing cantilever connected to the bracket unit and capable of swinging around a second axis substantially perpendicular to the first axis, and a base connected to the swing cantilever and defining an installation space with the swing cantilever, the telescopic unit is arranged in the installation space, and the elastic element is a gas pressure spring or a hydraulic spring, which is confined between the swing cantilever and the base.

[0014] The support device described in the present invention, the swing cantilever has two rail surfaces formed on the inner surface and spaced apart along the direction of the second axis, the rail surfaces extend along the length direction and are spaced apart from the base along the direction of the first axis, and the telescopic unit includes two rolling members, and the rolling members slide on the rail surfaces of the swing cantilever.

[0015] The beneficial effect of the present invention is that through the rolling property of the at least one rolling element, not only can the alignment of the elastic element during expansion and contraction be supported and maintained, but also the friction resistance of the elastic element during expansion and contraction can be reduced, thereby improving the smoothness of the cantilever unit during swinging. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 is a stereogram illustrating a known cantilever bracket disclosed in Chinese Patent Publication No. CN217356185;

[0018] Figure 2 is a three-dimensional schematic diagram illustrating an embodiment of the support device of the present invention suitable for connecting a fixed member and a movable member;

[0019] Figure 3 is an incomplete partial exploded perspective view of the embodiment;

[0020] Figure 4 is another incomplete partial exploded perspective view of the embodiment;

[0021] Figure 5 is a cross-sectional view of the embodiment;

[0022] Figure 6 is a partial cross-sectional view illustrating that the cantilever unit of the embodiment is located at an upper limit position;

[0023] Figure 7 is a partial cross-sectional view, illustrating that the cantilever unit described in the embodiment is located at the lower limit position;

[0024] Figure 8 It is along Figure 5 a sectional view taken along line VIII-VIII in FIG.

[0025] Fig. 9 yes Figure 5 A partially enlarged cross-sectional view illustrating that the movable seat of the embodiment is located at a first resistance position;

[0026] Fig.10 is similar to Fig. 9 A partially enlarged cross-sectional view of the embodiment of the present invention, but the movable seat is located at the second resistance position;

[0027] Fig.11 yes Figure 5 Another partially enlarged cross-sectional view of the embodiment, illustrating that the pressing seat of the embodiment is located at a first pre-pressing position;

[0028] Fig.12 is similar to Fig.11 , but the pressing seat is located at a second pre-pressing position; and

[0029] Fig.13 It is an incomplete stereogram, illustrating the variation of the telescopic unit in the embodiment. DETAILED DESCRIPTION

[0030] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 An embodiment of the support device of the present invention is suitable for connecting a fixed part 21 and a movable part 22. The fixed part 21 can be a table or a platform. The movable part 22 can be a microphone, a mobile phone, a tablet, or other elements that need to move in the environment. The support device includes a bracket unit 3, a cantilever unit 4, a carrier unit 5, a telescopic unit 6, an adjustment unit 7, and a pre-pressing unit 8.

[0031] The bracket unit 3 is suitable for connecting to the fixing member 21 , and includes a supporting cantilever 31 and an axle seat 32 .

[0032] The supporting cantilever 31 has an insertion hole 311 formed at one end and extending from an upper end surface toward a lower end surface along the first axis X1.

[0033] The shaft seat 32 is rotatably connected to the support cantilever 31 with the first axis X1 as the center, and has a rod 321 inserted into the insertion hole 311, two plates 322 spaced apart along a second axis X2 substantially perpendicular to the first axis X1, and a first blocking surface 323 connected to an upper end of the plate 322 and extending in the direction of the second axis X2. The plate 322 and the first blocking surface 323 define a lifting space 324 with an opening facing one side. Each of the plates 322 has a second blocking surface 325 extending in the direction of the first axis X1 and adjacent to a lower end and opposite to the first blocking surface 323. The first blocking surface 323 has a notch 326.

[0034] The cantilever unit 4 is connected to the shaft seat 32 and extends along its own length direction L. The cantilever unit 4 can rotate around the first axis X1 and includes a swing cantilever 41 , a base 42 , four magnetic elements 43 , a cover plate 44 , and a bolt assembly 45 .

[0035] The swing cantilever 41 is connected to the plate body 322 of the shaft seat 32, and can swing relative to the bracket unit 3 along the direction of the first axis X1 with the second axis X2 as the center. The swing cantilever 41 has a first end 411, two second ends 412 opposite to the first end 411 and spaced apart along the second axis X2, a sleeve portion 413 connected to the first end 411, a first abutment surface 414 formed between the second ends 412 and extending along the direction of the second axis X2, two second abutment surfaces 415 formed on an inner surface and adjacent to the second end 412, and two rail surfaces 416 formed on the inner surface and adjacent to the second end 412. The first abutment surface 414 has a convex portion 417 extending along the length direction L. The rail surface 416 faces the base 42 and extends along the length direction L. The rail surface 416 is also spaced apart along the direction of the second axis X2 and spaced apart from the base 42 along the direction of the first axis X1.

[0036] The base 42 is connected to the swing arm 41 and defines an installation space 401 with the swing arm 41 .

[0037] The magnetic element 43 is connected to a surface of the base 42 opposite to the swing arm 41 .

[0038] The cover plate 44 can be adsorbed by the magnetic element 43, and defines a wiring space 402 with the base 42 and the swing cantilever 41. The cover plate 44 has two opposite arc edges 441. The arc edges 441 and the swing cantilever 41 define two through-holes 440 that communicate with the outside and the wiring space 402. The wiring space 402 is suitable for allowing an electric wire (not shown) to pass through. The through-hole 440 is suitable for allowing the electric wire to enter and exit the wiring space 402.

[0039] The bolt assembly 45 passes through the plate 322 of the shaft seat 32 and the second end 412 of the swing arm 41 along the second axis X2 to pivotally connect the swing arm 41 and the shaft seat 32 .

[0040] See also Figure 3 , Figure 4 , Figure 6 and Figure 7 The cantilever unit 4 can be at an upper limit position (such as Figure 6 ) and a lower limit position (such as Figure 7 ). In the upper limit position, the first abutment surface 414 of the swing cantilever 41 is blocked by the first blocking surface 323 of the shaft seat 32, the protrusion 417 is engaged in the recess 326, and the cantilever unit 4 and the first axis X1 have an upper limit angle θ1 between 10 degrees and 30 degrees, preferably, the upper limit angle θ1 is 20 degrees. In the lower limit position, the second abutment surface 415 of the swing cantilever 41 is blocked by the second blocking surface 325 of the shaft seat 32, and the cantilever unit 4 and the first axis X1 have a lower limit angle θ2 between 130 degrees and 150 degrees, preferably, the lower limit angle θ2 is 140 degrees.

[0041] See also Figure 3 , Figure 4 , Figure 5 and Figure 8 The carrier unit 5 includes an ear seat 51 which is sleeved on the sleeve portion 413 of the swing cantilever 41 and can rotate around a third axis X3 which is substantially perpendicular to the first axis X1 and the second axis X2, and a connecting member 52 which is connected to the ear seat 51 and can swing around a fourth axis X4 which is parallel to the second axis X2. The connecting member 52 is suitable for connecting the movable member 22.

[0042] The telescopic unit 6 is disposed in the installation space 401 , and includes an elastic element 61 limited between the swing cantilever 41 and the base 42 , a linkage 62 , two rolling elements 63 , and a limiting seat 64 .

[0043] In this embodiment, the elastic element 61 is a gas spring such as a gas cylinder, or a hydraulic spring such as a hydraulic cylinder, which can be extended and retracted along the length direction L. The extension stroke of the elastic element 61 along the length direction L is smaller than the length of the rail surface 416 along the length direction L.

[0044] The linking member 62 is pivotally connected to one end of the elastic element 61 and partially inserted into the lifting space 324. In this embodiment, the linking member 62 is arc-shaped, and the arc opening faces the through opening 440 adjacent to the shaft seat 32. In this way, interference with the wires entering and exiting the wiring space 402 is avoided.

[0045] The rolling element 63 is rotatably mounted on the elastic element 61 and contacts the rail surface 416. In this embodiment, each of the rolling elements 63 is a bearing.

[0046] The limiting seat 64 is connected to the other end of the elastic element 61 and has two inclined surfaces 641 spaced apart from each other along the direction of the fourth axis X4.

[0047] See also Figure 3 , Figure 5 , Fig. 9 and Fig.10 The adjustment unit 7 includes a movable seat 71 that is inserted into the lifting space 324 and can move relative to the shaft seat 32 along the direction of the first axis X1, and a damping adjustment member 72 that can be operated and used to drive the movable seat 71. The movable seat 71 is pivotally connected to the linkage member 62. In this embodiment, the damping adjustment member 72 is a bolt that is rotatably inserted into the shaft seat 32 along the direction of the first axis X1 and is screwed to the movable seat 71.

[0048] The movable seat 71 can be in a high load position ( Fig. 9 ) and a low load position ( Fig.10 ). In the high load position, the elastic element 61 defines a first length d1 along the length direction L, and the linking member 62 and the elastic element 61 form a first working angle θ3. In the low load position, the elastic element 61 defines a second length d2 along the length direction L, the second length d2> the first length d1, and the linking member 62 and the elastic element 61 form a second working angle θ4, the second working angle θ4> the first working angle θ3. The damping adjustment member 72 is rotatably inserted into the shaft seat 32 along the direction of the first axis X1 and is screwed to the movable seat 71.

[0049] See also Figure 4 , Figure 5 , Fig.11 and Fig.12 The pre-stressing unit 8 is mounted on the mounting surface and includes a pressing seat 81 capable of compressing the elastic element 61 , and a pre-stressing adjusting member 82 that can be operated and used to drive the pressing seat 81 .

[0050] The pressing seat 81 faces the limiting seat 64 and has a reverse bevel group consisting of two reverse bevels 811 that match the bevel 641 . The reverse bevel 811 abuts against the bevel 641 .

[0051] In this embodiment, the pre-stressing adjustment member 82 is a bolt, which passes through the pressing seat 81 along the direction of the first axis X1 and is screwed to the swing cantilever 41 .

[0052] After the elastic element 61 is pivotally connected to the movable seat 71 through the linkage 62 but before being fixed to the cantilever unit 4, the elastic element 61 only needs to be pressed against the swing cantilever 41, and then the pre-stressing adjustment member 82 passes through the pressing seat 81 and is screwed to the swing cantilever 41. In the process of the pre-stressing adjustment member 82 being screwed toward the swing cantilever 41 along the direction of the first axis X1, the pressing seat 81 can be driven to move relative to the swing cantilever 41 along the direction of the first axis X1. In the process of the pressing seat 81 moving, the limiting seat 64 is pushed to compress the elastic element 61 along the length direction L. In this way, not only can the effect of pre-stressing the elastic element 61 be achieved, but the elastic element 61 can also be positioned by being restricted by the pressing seat 81 and the movable seat 71.

[0053] Then, the base 42 only needs to be locked to the swing arm 41 and the pressing seat 81, so that the elastic element 61 can be limited between the swing arm 41 and the base 42. It should be noted that the base 42 is not limited to being locked to the swing arm 41 and the pressing seat 81, and in other variations of this embodiment, it can also be directly locked to the swing arm 41. In addition, the elastic element 61 is not limited to being a gas spring or a hydraulic spring, and can also be a mechanical spring.

[0054] See also Figure 6 , Figure 7 , Figure 8 and Fig. 9When the cantilever unit 4 is operated and moves from the upper limit position along the direction of the first axis X1 toward the lower limit position, or from the lower limit position along the direction of the first axis X1 toward the upper limit position, the cantilever unit 4 will swing relative to the bracket unit 3 with the second axis X2 as the center. At the same time, the cantilever unit 4 will compress or stretch the elastic element 61 and obtain the supporting force for suspending the movable member 22 through the connection relationship between the linkage 62 and the elastic element 61 and the movable seat 71.

[0055] Importantly, when the elastic element 61 is compressed by the linking member 62 or stretched by the linking member 62, the rolling member 63 will slide on the rail surface 416 as the elastic element 61 expands and contracts along the length direction L. Thus, the rolling property of the rolling member 63 can not only support and maintain the alignment of the elastic element 61 when it expands and contracts, but also reduce the friction resistance of the elastic element 61 when it expands and contracts, thereby improving the smoothness of the swing of the cantilever unit 4.

[0056] It is worth noting that when the cantilever unit 4 is loaded, the gravity it bears is downward, and the direction of the supporting force of the elastic element 61 is opposite to the gravity and is upward. Therefore, the rolling element 63 is designed to contact the rail surface 416 of the swing cantilever 41 upward, so as to obtain a better supporting effect. It should be noted that the rolling element 63 is not limited to contacting the swing cantilever 41, but can also contact the base 42, or contact the swing cantilever 41 and the base 42.

[0057] See also Figure 5 , Fig. 9 and Fig.10 When the load of the telescopic unit 6 is to be adjusted, the damping adjustment member 72 only needs to be rotated forward or reversely, and the movable seat 71 can be driven to move along the direction of the first axis X1 during the rotation of the damping adjustment member 72. Fig. 9 When the movable seat 71 is in the high load position, the elastic element 61 is compressed, so that the air pressure or hydraulic pressure in the elastic element 61 increases and generates a larger supporting force. Fig.10 When it is located at the low load position, the elastic element 61 is stretched, so that the air pressure or hydraulic pressure in the elastic element 61 becomes smaller and a smaller supporting force is generated, thereby achieving the purpose of adjusting the load.

[0058] In addition, when the movable seat 71 is located at the low load position, the second working angle θ4 between the link 62 and the elastic element 61 is large, and the relative positions of the elastic element 61, the link 62 and the movable seat 71 are close to a straight line. Therefore, when the cantilever unit 4 swings along the direction of the first axis X1, the link 62 can directly compress or stretch the elastic element 61 in a manner close to linear movement, which can reduce the sense of resistance when the user operates the cantilever unit 4. On the contrary, when the movable seat 71 is located at the high load position, the second working angle θ4 between the link 62 and the elastic element 61 is small, and there is an obvious position difference between the elastic element 61, the link 62 and the movable seat 71. Therefore, when the user operates the cantilever unit 4, he will feel a more obvious sense of resistance.

[0059] It should be noted that the number of the rolling elements 63 is not limited to two. In other variations of this embodiment, the number of the rolling elements 63 may be as follows: Fig.13 As shown, there is 1. Thus, the rolling property of the rolling element 63 can also support and maintain the alignment of the elastic element 61 when it is extended and retracted, and can reduce the friction resistance of the elastic element 61 when it is extended and retracted, thereby improving the smoothness of the swing of the cantilever unit 4.

[0060] Through the above description, the advantages of the above embodiments can be summarized as follows:

[0061] 1. The present invention can adjust the load of the cantilever unit 4 and the hand feel when operating the cantilever unit 4 through the adjustment unit 7. When adjusting, it is only necessary to rotate the damping adjustment member 72. It is not only easy to use and operate, but also suitable for movable parts 22 of different weights.

[0062] 2. The present invention can also pre-press the elastic element 61 through the pressing seat 81 when installing the elastic element 61. Thus, after the elastic element 61 is arranged in the installation space 401, the elastic element 61 can be firmly confined between the pressing seat 81 and the movable seat 71 by the restoring force of the elastic element 61 without shaking or abnormal sound.

[0063] 3. More importantly, the present invention can support and maintain the alignment of the elastic element 61 during expansion and contraction through the rolling property of the rolling element 63, and can reduce the friction resistance of the elastic element 61 during expansion and contraction, thereby improving the smoothness of the cantilever unit 4 during swinging.

[0064] 4. In addition, the cover plate 44 can be adsorbed by the magnetic element 43 and fixed on the base 42. Therefore, the user can easily remove and install the cover plate 44 without tools, thereby improving the convenience of wire embedding.

[0065] The above descriptions are merely embodiments of the present invention and should not be used to limit the scope of the present invention. That is, any simple equivalent changes and modifications made according to the claims and description of the present invention still fall within the scope of the present invention.

Claims

1. A supporting device, comprising: The support unit comprises a support cantilever and an axle seat rotatably connected to the support cantilever with a first axis as the center; a cantilever unit, comprising a swing cantilever connected to the bracket unit, wherein the cantilever unit is capable of swinging relative to the bracket unit along a first axis; and A telescopic unit extending along its own length direction and connected to the cantilever unit and the bracket unit; Features: The shaft seat has a first blocking surface extending toward the swing cantilever and along the direction of the second axis, and two second blocking surfaces extending along the direction of the first axis and opposite to the first blocking surface; The swing cantilever has a first abutting surface facing the shaft seat, and two second abutting surfaces formed on the inner surface and facing the shaft seat, the cantilever unit can swing relative to the bracket unit between an upper limit position and a lower limit position along the direction of the first axis, when in the upper limit position, the first abutting surface is blocked by the first blocking surface, and when in the lower limit position, the second abutting surface is blocked by the second blocking surface; The telescopic unit includes an elastic element capable of being telescopic along the length direction, and at least one rolling element rotatably mounted on the elastic element, wherein the rolling element can slide on the cantilever unit along the length direction during the telescopic process of the elastic element.

2. The supporting device according to claim 1, characterized in that: The support device also includes an adjustment unit, which includes a movable seat that can move relative to the shaft seat along the direction of the first axis, and a damping adjustment member that can be operated and used to drive the movable seat. The telescopic unit also includes a linkage member pivotally connected to the elastic element and the movable seat.

3. The supporting device according to claim 2, characterized in that: The movable seat can move between a high load position and a low load position relative to the shaft seat along the direction of the first axis. In the high load position, the elastic element defines a first length along the length direction, and the linking member and the elastic element clamp a first working angle. In the low load position, the elastic element defines a second length along the length direction, and the second length>the first length, and the linking member and the elastic element clamp a second working angle, and the second working angle>the first working angle. The damping adjustment member can be rotatably inserted into the shaft seat along the direction of the first axis and screwed to the movable seat.

4. The supporting device according to claim 1, characterized in that: The supporting device also includes a prestressing unit, and the cantilever unit also includes a base connected to the swing cantilever and defining an installation space with the swing cantilever. The prestressing unit is connected to the swing cantilever and includes a pressing seat capable of compressing the elastic element, and a prestressing adjustment member that can be operated and used to drive the pressing seat.

5. The supporting device according to claim 4, characterized in that: The telescopic unit is arranged in the installation space and also includes a limit seat connected to the elastic element, the limit seat has at least one inclined surface facing the pressing seat, the pressing seat has a reverse inclined surface group matching with the at least one inclined surface and abutting against the at least one inclined surface, the pre-stressing adjustment member passes through the pressing seat along the direction of the first axis and is screwed to the swing cantilever, and in the process of the pre-stressing adjustment member being screwed toward the swing cantilever along the direction of the first axis, the pre-stressing adjustment member pushes the pressing seat to move relative to the swing cantilever along the direction of the first axis, and in the process of the pressing seat moving, the limit seat is pushed to compress the elastic element along the length direction.

6. The supporting device according to claim 1, characterized in that: The cantilever unit can also rotate around the first axis, and can swing along the direction of the first axis relative to the bracket unit between an upper limit position and a lower limit position. When in the upper limit position, the cantilever unit and the first axis include an upper limit angle between 10 degrees and 30 degrees. When in the lower limit position, the cantilever unit and the first axis include a lower limit angle between 130 degrees and 150 degrees.

7. The supporting device according to claim 6, characterized in that: The cantilever unit can also swing around a second axis substantially perpendicular to the first axis. The cantilever unit also includes a base connected to the swing cantilever and defining an installation space with the swing cantilever. The telescopic unit is arranged in the installation space. The elastic element is a gas spring or a hydraulic spring and is confined between the swing cantilever and the base.

8. The supporting device according to claim 7, characterized in that: The swing cantilever has two rail surfaces formed on the inner surface and spaced apart along the direction of the second axis. The rail surfaces extend along the length direction and are spaced apart from the base along the direction of the first axis. The telescopic unit includes two rolling members, which slide on the rail surfaces of the swing cantilever.

Images