CN217329073U

CN217329073U - Supporting device

Info

Publication number: CN217329073U
Application number: CN202123211962.6U
Authority: CN
Inventors: 黄俊皓; 郑建纬; 叶建成
Original assignee: Syncmold Enterprise Corp
Current assignee: Syncmold Enterprise Corp
Priority date: 2021-04-20
Filing date: 2021-12-20
Publication date: 2022-08-30
Anticipated expiration: 2031-12-20
Also published as: TWM627271U; TWM624179U; TWM629190U; CN216896606U; TWM629598U; CN216252997U

Abstract

The application provides a support device for bear a display, include: a column; an extension piece is arranged on the upright post; a bearing element for bearing the display; and a first torsion unit comprising: the first elastic set is sleeved on the extending piece, constantly provides a first torque force and is provided with a first screw cap, and the first torque force can be changed by adjusting the first screw cap; and the first friction group is arranged at intervals with the first elastic group and is provided with at least one first friction plate and a first nut which are sleeved on the extension piece, and the preset tightness of the first friction plate can be changed by adjusting the first nut.

Description

Supporting device

Technical Field

The present application provides a supporting device, especially a supporting device capable of independently adjusting torque and friction.

Background

TWM350628 discloses a cam assembly for a rotating shaft, which comprises a pivot member, a bracket, at least one friction plate, a cam assembly, at least one elastic member and an end sealing member, wherein the cam assembly comprises a fixed member and a sliding member. The pivot member includes a shaft having a non-circular cross-section that is received in the friction plate and cam assembly slide member so as to be synchronously movable with the shaft. The support is used for the shaft lever to pass through. The fixing piece is fixed on one side of the support, clamps the friction plate together with the support, and is in butt joint with the sliding piece. The elastic body is sleeved on the shaft rod, so that the sliding piece can axially move on the shaft rod. An end seal is coupled to the free end of the shaft to prevent axial removal of the components.

In the cam assembly, if the sealing end piece (i.e., the anti-slip nut) is screwed to the shaft, the tightening degree of the elastic body is changed to generate different torsion forces, but the tightening degree of the friction plates clamped between the bracket and the pivot piece and between the bracket and the fixing piece is also affected, in other words, the torsion force and the friction force are affected (increased or decreased simultaneously), and there is no way to operate independently, so that, for example, when the torsion force needs to be increased but the friction force needs to be decreased, the adjustment trouble is generated.

SUMMERY OF THE UTILITY MODEL

The application provides a strutting arrangement for bear a display to set up in a working face, this strutting arrangement includes: a column extending substantially in a direction of gravity and including an opening; an extension member including a neck and a shaft, the neck being disposed on the column and partially extending outward from the opening, the shaft being fixedly disposed on the neck along a first axis; a bearing member for bearing the display, capable of rotating and changing between a first position and a second position relative to the convex neck by taking the first axis as an axis, and comprising a first frame pivotally sleeved on the shaft rod; and a first torsion unit comprising: a first elastic set, which is sleeved on the shaft rod, constantly provides a first torsion, and has a first nut, when the bearing member is located at the first position, the first torsion is a first bottom end value, the first bottom end value can be changed by adjusting the first nut, and when the bearing member is changed from the first position to the second position, the first torsion is gradually increased; the first friction group is arranged at intervals with the first elastic group and is provided with at least one first friction plate and a first nut which are sleeved on the shaft rod, and a preset tightness of the first friction plate can be changed by adjusting the first nut; when an external force is applied, the bearing piece can be tilted and converted between the first position and the second position, the first torque is correspondingly changed, the first friction plate generates friction, and when the external force is removed, the bearing piece is stopped at any position between the first position and the second position.

In the above-mentioned supporting device, the first friction set further has at least one first stop washer sleeved on the shaft rod, the first stop washer is fixed to the first frame, and the first friction plate is located between the first stop washer and the first nut.

In the above-mentioned supporting device, the first elastic assembly further has a first fixed cam, a first movable cam and at least one first bowl-shaped washer sleeved on the shaft rod, when the supporting member is changed from the first position to the second position, the deformation degree of the first bowl-shaped washer gradually increases, so that the first torsion force gradually increases, and when the supporting member is changed from the second position to the first position, the deformation degree of the first bowl-shaped washer gradually decreases, so that the first torsion force gradually decreases.

In the above-mentioned supporting device, the first frame has a first receiving groove, a first fixing portion and a first limiting portion, the first elastic set and the first friction set are jointly received in the first receiving groove, the first stop washer is fixed to the first fixing portion, the first stop cam is fixed to the first limiting portion, and the first stop washer and the first stop cam can rotate relative to the shaft rod along with the bearing member.

In the above-mentioned supporting device, the first fixed cam, the first movable cam, the first bowl-shaped washer and the first nut are sequentially sleeved on the shaft rod, and by adjusting the first nut, a first preset distance between the first nut and the first fixed cam is changed, so that a preset degree of the first bowl-shaped washer being pressed can be adjusted; the first stop washer, the first friction plate and the first nut are sequentially sleeved on the shaft rod, and the preset tightness of the first friction plate can be adjusted by adjusting the first nut to change a first distance between the first nut and the first stop washer.

In the above-mentioned supporting device, the shaft rod has a non-circular cross section, the first movable cam has a first through hole matching with the non-circular cross section, and when the bearing member rotates relative to the shaft rod, the first movable cam does not rotate relative to the shaft rod but can slide on the shaft rod along the first axis, thereby changing the deformation degree of the first bowl-shaped washer.

In the above-mentioned supporting device, the first fixed cam has two first protrusions spaced apart from each other, the first movable cam has two first concave regions and two first convex regions, the first convex regions are respectively and correspondingly formed between the first concave regions, when the bearing member is located at the first position, the first concave regions and the first protrusions are completely and correspondingly complementary to each other, when the bearing member is located at the second position, the first convex regions and the first protrusions are completely and correspondingly abutted against each other, when the bearing member is tilted and transformed from the first position to the second position, the first protrusions are gradually separated from the first concave regions and gradually abutted against the first convex regions, so that the first movable cam gradually approaches the first nut and gradually more presses the first bowl-shaped washer, when the bearing member is tilted and transformed from the second position to the first position, the first convex block is gradually separated from the first convex area and gradually returns to the first concave area, and the first bowl-shaped washer elastically pushes the first movable cam to be gradually far away from the first screw cap.

In the above-mentioned supporting device, the first frame further has a first body, two first plate bodies and a first engaging block, the first body and the first plate bodies surround and define the first accommodating groove, the first fixing portion is formed on the first body, the first limiting portion is formed on the first engaging block, and the first plate bodies are respectively connected to two sides of the first body and extend outward.

In the above-mentioned supporting device, the first body has a first axial hole for the shaft rod to pass through, the first engaging block penetrates through the first accommodating groove and has a first upper block and a first lower block, the first upper block is fixed on one of the first plate bodies, and the first lower block is fixed on the other of the first plate bodies.

In the above-mentioned supporting device, the first upper block body has a first upper groove, the first lower block body has a first lower groove, the first upper groove and the first lower groove jointly define the first position-limiting portion, the first fixed cam further has two first protruding tongues, and the first protruding tongues are respectively and correspondingly disposed on the first upper groove and the first lower groove.

In the above-mentioned supporting device, the number of the first bowl-shaped washers is even, each first bowl-shaped washer has a first outward protruding surface, the first outward protruding surfaces of any two adjacent first bowl-shaped washers face to opposite directions, the first stop washer has two first positioning hooks, the first body further has two first grooves, the first grooves define the first fixing portion together, and the first positioning hooks are respectively and correspondingly disposed in the first grooves.

In the aforementioned supporting device, the supporting member includes a main plate, a front plate, a rear plate and a second frame, the main plate has an accommodating space, the second frame is pivotally sleeved on the shaft rod, the front plate and the rear plate are respectively connected to two opposite sides of the first frame and the second frame, the first torsion unit, the first frame and the second frame are disposed in the accommodating space, and the main plate can rotate relative to the extending member, the first frame and the second frame by a third axis and convert the display between a horizontal swinging position and a horizontal swinging position.

As mentioned above, the supporting device further includes a second torsion unit, the second torsion unit includes: a second elastic set sleeved on the shaft rod and constantly providing a second torsion, wherein the second elastic set is provided with a second screw cap, when the bearing piece is positioned at the first position, the second torsion is a second bottom end value, the second bottom end value can be changed by adjusting the second screw cap, and when the bearing piece is changed from the first position to the second position, the second torsion is gradually increased; the second friction group is arranged at intervals with the second elastic group and is provided with at least one second friction plate and a second nut which are sleeved on the shaft rod, and a preset tightness of the second friction plate can be changed by adjusting the second nut; when an external force is applied, the bearing piece can be tilted and transformed between the first position and the second position, the second torsion force is correspondingly changed, the second friction plate generates friction, and when the external force is removed, the bearing piece is stopped at any position between the first position and the second position.

In the above-mentioned supporting device, the second friction set further has at least one second stop washer sleeved on the shaft rod, the second stop washer is fixed to the second frame, and the second friction plate is located between the second stop washer and the second nut.

In the aforementioned supporting device, the second elastic set further has a second fixed cam, a second movable cam and at least a second bowl-shaped washer, the second movable cam has a second through hole matching with the non-circular cross section of the shaft rod, when the supporting member rotates relative to the shaft rod, the second movable cam does not rotate relative to the shaft rod but can slide on the shaft rod along the first axis, so as to change the deformation degree of the second bowl-shaped washer, when the supporting member changes from the first position to the second position, the deformation degree of the second bowl-shaped washer gradually increases, so that the second torsion force gradually increases, and when the supporting member changes from the second position to the first position, the deformation degree of the second bowl-shaped washer gradually decreases, so that the second torsion force gradually decreases.

In the aforementioned supporting device, the second frame has a second receiving slot, a second fixing portion and a second limiting portion, the second elastic set and the second friction set are jointly received in the second receiving slot, the second stop washer is fixed to the second fixing portion, the second fixed cam is fixed to the second limiting portion, and the second stop washer and the second fixed cam can rotate relative to the shaft rod along with the supporting member.

In the above-mentioned supporting device, the second fixed cam, the second movable cam, the second bowl-shaped washer and the second nut are sequentially sleeved on the shaft rod, and by adjusting the second nut, a second preset distance between the second nut and the second fixed cam is changed, so that the preset degree of the second bowl-shaped washer being pressed can be adjusted; the second stop washer, the second friction plate and the second nut are sequentially sleeved on the shaft rod, and the preset tightness of the second friction plate can be adjusted by adjusting the second nut to change a second distance between the second nut and the second stop washer.

In the above-mentioned supporting device, the second fixed cam has two second protrusions spaced apart from each other, the second movable cam has two second depressed areas and two second raised areas, the second raised areas are respectively and correspondingly formed between the second depressed areas, when the bearing member is located at the first position, the second depressed areas and the second protrusions are completely and correspondingly complementary to each other, when the bearing member is located at the second position, the second raised areas and the second protrusions are completely and correspondingly abutted against each other, when the bearing member is tilted and transformed from the first position to the second position, the second protrusions gradually disengage from the second depressed areas and gradually abut against the second raised areas, so that the second movable cam gradually approaches the second nut and gradually presses the second bowl-shaped washer, when the bearing member is tilted and transformed from the second position to the first position, the second convex block is gradually separated from the second convex area and gradually returns to the second concave area, and the second bowl-shaped washer elastically pushes the second movable cam to be gradually far away from the second screw cap.

In the above-mentioned supporting device, the second frame further has a second body, two second plate bodies and a second engaging block, the second body and the second plate bodies surround and define the second receiving groove, the second fixing portion is formed on the second body, the second limiting portion is formed on the second engaging block, and the second plate bodies are respectively connected to two sides of the second body and extend outward; the second body is provided with a second shaft hole for the shaft lever to penetrate through, the second clamping block penetrates through the second accommodating groove and is provided with a second upper block body and a second lower block body, the second upper block body is fixedly arranged on one of the second plate bodies, the second lower block body is fixedly arranged on the other of the second plate bodies, the second upper block body is provided with a second upper groove, the second lower block body is provided with a second lower groove, the second upper groove and the second lower groove jointly define the second limiting part, the second fixed cam is further provided with two second convex tongues, and the second convex tongues are correspondingly arranged on the second upper groove and the second lower groove respectively.

In the above-mentioned supporting device, the number of the second bowl-shaped washers is even, each second bowl-shaped washer has a second outward protruding surface, the second outward protruding surfaces of any two adjacent second bowl-shaped washers face opposite directions, the second stop washer has two second positioning hooks, the second body further has two second grooves, the second grooves define the second fixing portion together, and the second positioning hooks are respectively and correspondingly disposed in the second grooves.

Drawings

Fig. 1 is an overall schematic view of the support device of the present application.

Fig. 2 and 3 are exploded views of a left front top view and a right rear top view of a part of components in the supporting device of the present application.

Fig. 4A and 4B are exploded views of a left front top view and a right rear top view of a first frame and a first torsion unit in a supporting device of the present application.

Fig. 5A and 5B are exploded views of a left front top view and a right rear top view of a second frame and a second torsion unit in the supporting device of the present application.

Fig. 6A and 6B are enlarged schematic views of the left front upper view and the right front upper view of the first/second movable cam and the first/second fixed cam in the supporting device of the present application.

Fig. 7A is a cross-sectional view of the support device of the present application in a first position.

Fig. 7B is a front view of a portion of the components of fig. 7A.

Fig. 8A is a cross-sectional view of a support device of the present application in a second position.

Fig. 8B is a front view of a portion of the components of fig. 8A.

Description of the reference numerals

1000 supporting device

2000 display

3000 working face

1: base

2: column

21 opening of the container

3 extension piece

31 convex neck

311 assembly of through-holes

312 upper contact part

313 lower contact part

32: shaft lever

321 middle section

322 extension section

4 bearing part

41 first frame

411 first body

4111 first shaft hole

4112 first groove

4113 the first keyhole

412 the first plate body

413 first engaging block

4131 first upper block

41311 first upper groove

41312 first upper concave hole

4132 first lower block

41321 first lower groove

41322 the first lower concave hole

414 first accommodation groove

415 first fixing part

416 first position-limiting part

417 first front screw hole

418 first rear screw hole

419 holes of the first plate body

42 second frame

421 the second body

4211 second shaft hole

4212 second groove

4213 the second lock hole

422 the second plate body

423 second engaging block

4231 second upper block

42311 second upper groove

42312 second upper concave hole

4232 second lower block

42321 the second lower groove

42322 second lower concave hole

424 second accommodation groove

425 second fixing part

426 second position-limiting part

427 second front screw hole

428 second back screw hole

429 second plate body hole

43 main board

431 accommodating space

44 front plate

441 screw holes of front plate

45 rear plate

451 rear plate screw hole

46 friction ring

47 first positioning member

48 second positioning piece

First torsion unit

51 first elastic group

511 first nut

512 first bowl type washer

5121 first outward protruding surface

513 first moving cam

5131A first through hole

5132 first recess region

5133 first convex region

514 first fixed cam

5141 first bump

5142 first tongue

515 first shim

52 first friction group

521 first nut

522 first friction plate

523 first stop washer

5231 first positioning hook

524 first bowl-shaped gasket

525 first backing ring

6 second torsion unit

61 second elastic group

611, second screw cap

612 second bowl type washer

6121 the second external convex surface

613 second movable cam

6131 second through hole

6132 second recessed area

6133 second raised area

614 second fixed cam

6141 second bump

6142 second tongue

615 second pad

62 second friction group

621 second nut

622 second friction plate

623 second stop washer

6231A second positioning hook

624 second bowl-shaped gasket

625 second backing ring

D1 first predetermined distance

D2 second predetermined distance

F external force

G direction of gravity

T1 first spacing

T2 second pitch

X1 first axis

X2 second axis

X3: third axis.

Detailed Description

Referring to fig. 1 to 3, a supporting device 1000 of the present application is used for carrying a display 2000 and is disposed on a working surface 3000 (e.g., a desktop), and the supporting device 1000 includes a base 1, a column 2, an extending member 3, a carrying member 4, a first torsion unit 5, and a second torsion unit 6. The base 1 is disposed on the work surface 3000. The column 2 is disposed on the base 1 and substantially extends along a gravity direction G. The extension 3 is provided to the upright 2 and extends outwardly. The carrier 4 is connected to the extending member 3, and is used for carrying the display 2000, and can be tilted between a first position and a second position relative to the extending member 3 by taking a first axis X1 perpendicular to the gravity direction G as an axis. The first torsion unit 5 and the second torsion unit 6 are disposed on the supporting member 4 opposite to each other, respectively, in the embodiment, the first torsion unit 5 and the second torsion unit 6 are symmetrically disposed on two sides of the extending member 3 with reference to the extending member 3, but not limited thereto.

The base 1 is a substantially rectangular plate, so that it can be stably and directly placed on the working surface 3000, but it is not limited thereto, and may be in the form of a screw lock (on a wall) or a clamp (on a table).

The column 2 is a substantially rectangular column, extends in a manner of slightly inclining the working surface 3000, and is disposed on the base 1. In other embodiments, the upright 2 may also extend perpendicular to the working surface 3000 and be disposed on the base 1, which is not limited herein. The upright 2 comprises an opening 21, the opening 21 extending substantially in the direction of gravity G.

The extension 3 includes a protruding neck 31 and a shaft 32. The collar 31 is disposed on the upright 2 and partially extends outward from the opening 21 along a second axis X2 perpendicular to the gravity direction G, and can reciprocate in the upright 2 through a slide rail (not shown), in this embodiment, the collar 31 is a pulley capable of substantially sliding along the gravity direction G, but not limited thereto, for example, the collar 31 may also be fixedly connected to one end of the upright 2. The male neck 31 has an assembly through hole 311, an upper abutting portion 312 and a lower abutting portion 313. The assembly through hole 311 extends along a first axis X1 (substantially perpendicular to the gravity direction G and the second axis X2), and has a linear cross-sectional shape, but not limited thereto, as long as it is non-circular. The upper abutting portion 312 is an arc-shaped recess and is located above the assembling through hole 311. The lower abutting portion 313 is in an arc-shaped recess and is located below the assembling through hole 311, and is spaced from the upper abutting portion 312 along the gravity direction G. The shaft 32 is fixedly disposed on the neck 31 along a first axis X1 and has a middle section 321 and two extending sections 322. The middle section 321 has a straight cross-section and matches with the cross-section of the assembly hole 311 to be assembled with the assembly hole 311. The extension sections 322 extend outward from both ends of the middle section 321 along the first axis X1, respectively, and part of the surfaces are formed with threads, which are also in-line in cross-sectional shape, but have a cross-sectional dimension smaller than that of the middle section 321.

Referring to fig. 4A to 4B, the carrier 4 includes a first frame 41, a second frame 42, a main plate 43, a front plate 44, a rear plate 45, two friction rings 46, two first positioning elements 47, and two second positioning elements 48. The first frame 41 is a concave semicircular disc, and is pivotally sleeved on one of the extension sections 322 of the shaft 32 and located at one side of the protruding neck 31, and includes a first body 411, two first plates 412, a first engaging block 413, a first receiving groove 414, a first fixing portion 415, a first limiting portion 416, two first front screw holes 417, two first rear screw holes 418, and two first plate holes 419. The first body 411 is a U-shaped plate and has a first shaft hole 4111, two first grooves 4112, and two first lock holes 4113. The first shaft hole 4111 is a through hole, extends through along the first axis X1, has a circular cross-sectional shape, and is used for one of the extension sections 322 of the shaft 32 to pass through. The first grooves 4112 are through grooves, respectively extend through in parallel with the first axis X1, have a square cross section, and are respectively arranged above and below the first shaft hole 4111 along the gravity direction G. The first locking holes 4113 are blind holes, respectively extend parallel to the first axis X1, have a circular cross-sectional shape, and are respectively arranged above and below the corresponding first groove 4112 along the gravity direction G. The first plates 412 are generally fan-shaped and connected to two sides of the first body 411 to extend outward. The first engaging block 413 has a first upper block 4131 and a first lower block 4132, the first upper block 4131 has a generally h-shaped cross section and has a first upper groove 41311 and a first upper concave hole 41312, the first upper groove 41311 extends parallel to the first axis X1, the first upper concave hole 41312 is a through hole and is spaced apart from the first upper groove 41311 and away from the first axis X1 (located above the first axis X1 with the gravity direction G as the reference). The first lower block 4132 has a generally inverted h-shaped cross section and has a first lower groove 41321 and a first lower recess 41322, the first lower groove 41321 extends parallel to the first axis X1 and corresponds to the first upper groove 41311, and the first lower recess 41322 is a through hole and is spaced apart from the first lower groove 41321 and away from the first axis X1 (located below the first axis X1 with reference to the gravity direction G). The first accommodating groove 414 is defined by the first body 411 and the first plate 412, and is provided for the first engaging block 413 to penetrate therethrough. The first fixing portion 415 is formed on the first body 411 and is defined by the first groove 4112, and is used for fixing a part of the first torsion unit 5. The first position-limiting portion 416 is formed on the first engaging block 413 and defined by the first upper groove 41311 and the first lower groove 41321 to limit a portion of the first torque unit 5. The first front screw holes 417 are formed at edges of the first plate 412, respectively. The first rear screw holes 418 are respectively formed at the edge of the first plate 412 and spaced apart from the first front screw holes 417. The first plate holes 419 are through holes and formed on the first plate 412 near the first receiving groove 414 respectively, and are communicated with the first upper concave hole 41312 and the first lower concave hole 41322 respectively, so that the first upper block 4131 and the first lower block 4132 can be respectively locked on the first plate 412 by using screws (not shown), for example.

Referring to fig. 5A to 5B, the second frame 42 is a concave semicircular disc, pivotally sleeved on another of the extension sections 322 of the shaft 32 and located on the other side of the protruding neck 31, and includes a second body 421, two second plates 422, a second engaging block 423, a second receiving groove 424, a second fixing portion 425, a second limiting portion 426, two second front screw holes 427, two second rear screw holes 428, and two second plate holes 429. The second body 421 is a U-shaped plate and has a second shaft hole 4211, two second grooves 4212 and two second locking holes 4213. The second shaft hole 4211 is a through hole, extends through along the first axis X1, has a circular cross-sectional shape, and is used for another one of the extension sections 322 of the shaft 32 to pass through. The second grooves 4212 are through grooves, each of which extends parallel to the first axis X1 and has a square cross section, and are arranged above and below the second shaft hole 4211 along the gravity direction G. The second locking holes 4213 are blind holes, respectively extend parallel to the first axis X1, have circular cross-sectional shapes, and are respectively arranged above and below the corresponding second grooves 4212 along the gravity direction G. The second plates 422 are generally fan-shaped and connected to two sides of the second body 421 to extend outward. The second engaging block 423 has a second upper block 4231 and a second lower block 4232, the second upper block 4231 is generally h (lower case) shaped in cross section and has a second upper groove 42311 and a second upper concave hole 42312, the second upper groove 42311 extends parallel to the first axis X1, the second upper concave hole 42312 is a through hole and is spaced apart from the second upper groove 42311 and is far away from the first axis X1 (located above the first axis X1 with reference to the gravity direction G). The second lower block 4232 is generally inverted h-shaped in cross section and has a second lower groove 42321 and a second lower concave hole 42322, the second lower groove 42321 extends parallel to the first axis X1 and corresponds to the second upper groove 42311, the second lower concave hole 42322 is a through hole and is spaced apart from the second lower groove 42321 and is far away from the first axis X1 (located below the first axis X1 based on the gravity direction G). The second receiving groove 424 is defined by the second body 421 and the second plate 422, and the second engaging block 423 is disposed through the second receiving groove. The second fixing portion 425 is formed on the second body 421 and is defined by the second groove 4212, and is used for fixing a part of the second torsion unit 6. The second position-limiting portion 426 is formed on the second engaging block 423 and is defined by the second upper groove 42311 and the second lower groove 42321 together to limit a portion of the second torsion unit 6. The second front screw holes 427 are respectively formed at edges of the second plate 4221. The second rear screw holes 428 are respectively formed at the edges of the second plate 422 and spaced apart from the second front screw holes 427. The second plate holes 429 are through holes respectively formed at the second plate 422 near the second receiving groove 424, and are respectively communicated with the second upper concave hole 42312 and the second lower concave hole 42322, so that the second upper block 4231 and the second lower block 4232 can be respectively locked to the second plate 422 by using screws (not shown), for example.

The main board 43 is substantially square, and a receiving space 431 is formed at the center of the main board to receive the first frame 41 and the second frame 42. The front plate 44 is disposed in front of the main plate 43 (i.e. far away from the upright 2) along the second axis X2, and has four front plate screw holes 441, two of the front plate screw holes 441 are communicated with the first front screw hole 417, and the other two front plate screw holes 441 are communicated with the second front screw hole 427, so that the front plate 44 can be respectively locked to the front sides of the first frame 41 and the second frame 42 by screws (not shown). The rear plate 45 is disposed behind the main plate 43 (i.e. closer to the upright 2) along the second axis X2, and has four rear plate screw holes 451, two of the rear plate screw holes 451 are communicated with the first rear screw hole 418, and the other two rear plate screw holes 451 are communicated with the second rear screw hole 428, so that the rear plate 45 can be locked on the rear sides of the first frame 41 and the second frame 42 by screws (not shown). The front plate 44 and the rear plate 45 can limit the first frame 41 and the second frame 42 in the accommodating space 431. The friction rings 46 are respectively disposed between the front plate 44 and the main plate 43 and between the main plate 43 and the rear plate 45, and in this embodiment, are respectively plastic ring pieces (e.g., POM plastic) for preventing the main plate 43 from wearing when rotating relative to the front plate 44 and the rear plate 45. The first positioning members 47 are respectively a stud bolt and are screwed in the first locking hole 4113. When the carrier 4 is in the first position, one of said first detents 47 abuts the upper abutment 312. When the carrier 4 is in the second position, the other of the first detents 47 abuts against the lower abutment 313. The second positioning members 48 are respectively a stud bolt and are screwed into the second locking holes 4213. When the carrier 4 is in the first position, one of the second positioning members 48 abuts against the upper abutment 312. When the carrier 4 is in the second position, the other of the second positioning members 48 abuts against the lower abutment portion 313.

The first torque unit 5 is accommodated in the first accommodating groove 414 and the accommodating space 431, and includes a first elastic set 51 and a first friction set 52. The first elastic set 51 is sleeved on one of the extension sections 322 of the shaft 32, constantly provides a first torque, and has a first nut 511, six first bowl-shaped washers 512, a first moving cam 513, a first fixed cam 514, and a first washer 515. The first nut 511 is screwed on the end of one of the extension sections 322 of the shaft 32. The first bowl-shaped washer 512 is sleeved on one of the extension sections 322 and limited by the first nut 511, each first bowl-shaped washer 512 is provided with a first protruding surface 5121, and the first protruding surfaces 5121 of any two adjacent first bowl-shaped washers 512 face to opposite directions. The present application is not limited to six first bowl-shaped washers 512, and the number of the first bowl-shaped washers 512 may be changed to increase or decrease the preset first torque. Referring to fig. 6A and 6B, the first movable cam 513 is sleeved on one of the extension sections 322, abuts against the first bowl-shaped washer 512, and has a first through hole 5131, two first concave areas 5132, and two first convex areas 5133. The first through hole 5131 is in a straight shape, but not limited thereto, as long as it is non-circular and matches with the cross-sectional shape of one of the extension sections 322 of the shaft 32, so that the first movable cam 513 cannot rotate relative to one of the extension sections 322, but can slide on one of the extension sections 322 along the first axis X1. The first concave regions 5132 are arranged along a direction perpendicular to the gravity direction G, and are respectively located at two sides of the first axis X1 at intervals, and are sandwiched by 180 degrees. The first protruding areas 5133 are arranged along the direction of gravity G, and are respectively located at two sides of the first axis X1 at intervals and respectively and correspondingly formed between the first recessed areas 5132, and the first protruding areas 5133 are sandwiched by 180 degrees. The first cam 514 is fixed to the first position-limiting portion 416, can rotate with the carrier 4 relative to the shaft 32, and has two first protrusions 5141 and two first tongues 5142. The first protrusions 5141 are arranged along a direction perpendicular to the gravity direction G, and are spaced apart from each other and clamped at 180 degrees, when the carrier 4 is located at the first position, the first protrusions 5141 and the first concave regions 5132 are completely and correspondingly complementary to each other, and when the carrier 4 is located at the second position, the first protrusions 5141 and the first convex regions 5133 are completely and correspondingly abutted against each other. The first protruding tongues 5142 are arranged along the gravity direction G, spaced apart from each other and clamped at 180 degrees, and respectively disposed in the first upper grooves 41311 and the first lower grooves 41321. The first washer 515 is disposed between the first nut 511 and the first bowl-shaped washer 512, so as to prevent the first nut 511 from wearing the first bowl-shaped washer 512 when rotating.

The first friction set 52 is sleeved on one of the extension sections 322 of the shaft 32, is disposed adjacent to the first elastic set 51, and has a first nut 521, three first friction plates 522, three first stop washers 523, two first bowl-shaped washers 524, and a first backing ring 525. A first nut 521 is screwed onto one of the extensions 322 of the shaft 32 adjacent to the first fixed cam 514. Two of the first friction sheets 522 are sleeved on one of the extending sections 322 of the shaft 32 and accommodated in the first accommodating groove 414, and the other of the first friction sheets 522 is sleeved on one of the extending sections 322 of the shaft 32, and is located between the first frame 41 and the middle section 321 and abuts against the middle section 321. The first friction plates 522 each have a through hole in the middle, the cross section of the through hole is in a straight shape and matches the cross section of the extension 322, so that the first friction plates 522 do not rotate relative to each other when the carrier 4 rotates relative to the shaft 32. Two of the first retaining washers 523 are disposed in one of the extension sections 322 of the shaft 32 and accommodated in the first accommodating groove 414, and are stacked alternately with the first friction plates 522, and the other of the first retaining washers 523 is disposed in one of the extension sections 322 of the shaft 32 and between the first frame 41 and the middle section 321, and abuts against the other of the first friction plates 522. The first stop washers 523 are fixed to the first fixing portion 415, can rotate with the carrier 4 relative to the shaft 32, and each have two first positioning hooks 5231. The first positioning hooks 5231 extend outwards parallel to the first axis X1 and are arranged along the gravity direction G, and are respectively and correspondingly disposed in the first grooves 4112. The first bowl washer 524 is sleeved on one of the extension sections 322 of the shaft 32 and located between the first nut 521 and the first friction plate 522. The first backing ring 525 is disposed between the first nut 521 and the first bowl washer 524, for preventing the first bowl washer 524 from being worn when the first nut 521 rotates.

The second torsion unit 6 is accommodated in the second accommodating groove 424 and the accommodating space 431, and includes a second elastic set 61 and a second friction set 62. The second elastic set 61 is disposed on another one of the extension sections 322 of the shaft 32, and is provided with a second nut 611, six second bowl-shaped washers 612, a second moving cam 613, a second fixed cam 614, and a second washer 615. A second nut 611 is screwed on the end of the other of the extension sections 322 of the shaft 32. The second bowl-shaped washers 612 are sleeved on another one of the extension sections 322 and limited by the second nut 611, and each second bowl-shaped washer 612 has a second protruded surface 6121, and the second protruded surfaces 6121 of any two adjacent second bowl-shaped washers 612 face in opposite directions. The present application is not limited to six second bowl-shaped washers 612, and the number of the second bowl-shaped washers 612 may be changed to increase or decrease the preset second torque. Referring to fig. 6A and fig. 6B, the second movable cam 613 is sleeved on the other one of the extension sections 322, abuts against the second bowl-shaped washer 612, and has a second through hole 6131, two second recessed areas 6132 and two second protruding areas 6133. The second through hole 6131 is in a straight shape, but not limited thereto, as long as it is non-circular and matches with the cross-sectional shape of the other one of the extension sections 322 of the shaft 32, whereby the second movable cam 613 can not rotate relative to the other one of the extension sections 322, but can slide on the other one of the extension sections 322 along the first axis X1. The second recessed areas 6132 are arranged along a direction perpendicular to the gravity direction G, and are located at two sides of the first axis X1 at intervals, respectively, and form an angle of 180 degrees therebetween. The second protruding regions 6133 are arranged along the direction of gravity G, and are located on two sides of the first axis X1 at intervals and correspondingly formed between the second recessed regions 6132, respectively, and the second protruding regions 6133 are sandwiched by 180 degrees. The second fixed cam 614 is fixed to the second limiting portion 426, can rotate with the carrier 4 relative to the shaft 32, and has two second protrusions 6141 and two second tongues 6142. The second bumps 6141 are arranged along a direction perpendicular to the gravity direction G, and are spaced from each other and sandwiched by 180 degrees, when the carrier 4 is located at the first position, the second bumps 6141 and the second recessed areas 6132 are completely and correspondingly complementary to each other, and when the carrier 4 is located at the second position, the second bumps 6141 and the second raised areas 6133 are completely and correspondingly abutted against each other. The second tongues 6142 are arranged along the gravity direction G, spaced apart from each other and clamped at 180 degrees, and respectively disposed in the second upper groove 42311 and the second lower groove 42321. The second washer 615 is disposed between the second nut 611 and the second bowl-shaped washer 612, and is used to prevent the second nut 611 from wearing the second bowl-shaped washer 612 when rotating.

The second friction set 62 is sleeved on the other of the extension sections 322 of the shaft 32, is disposed adjacent to the second elastic set 61, and has a second nut 621, three second friction plates 622, three second stop washers 623, two second bowl-shaped washers 624, and a second grommet 625. The second nut 621 is screwed on the other of the extension sections 322 of the shaft 32 and adjacent to the second fixed cam 614. Two of the second friction plates 622 are sleeved on the extension sections 322 of the shaft 32, and the other is accommodated in the second accommodating groove 424, and the other of the second friction plates 622 is sleeved on the other of the extension sections 322 of the shaft 32, and is located between the second frame 42 and the middle section 321 and abuts against the middle section 321. The second friction plates 622 each have a through hole with a straight cross section matching the cross section of the extension 322, so that the second friction plates 622 do not rotate relative to each other when the carrier 4 rotates relative to the shaft 32. Two of the second stopping washers 623 are disposed in the second receiving groove 424 of the extending section 322 of the shaft 32, and are alternately stacked with the second friction plates 622, and the other of the second stopping washers 623 is disposed between the second frame 42 and the middle section 321 of the shaft 32 and is adjacent to the other of the second friction plates 622. The second stop washers 623 are fixed to the second fixing portion 425, can rotate with the carrier 4 relative to the shaft 32, and each have a second positioning hook 6231. The second positioning hooks 6231 extend outward in parallel with the first axis X1 and are arranged along the gravity direction G, and are respectively and correspondingly disposed in the second grooves 4212. The second bowl washer 624 is sleeved on the other of the extension sections 322 of the shaft 32 and located between the second nut 621 and the second friction plate 622. The second grommet 625 is disposed between the second nut 621 and the second bowl-shaped washer 624, so as to prevent the second nut 621 from wearing the second bowl-shaped washer 624 when rotating.

The operation of the supporting device 1000 of the present application will be described below. Referring to fig. 7A and 7B, when the carrier 4 is at the first position relative to the protruding neck 31 by taking the first axis X1 as an axis, the first positioning element 47 and the second positioning element 48 located above the first axis X1 abut against the upper abutting portion 312, the first concave area 5132 and the first protrusion 5141 are completely complementary to each other (i.e., the first movable cam 513 and the first fixed cam 514 are completely engaged), the second concave area 6132 and the second protrusion 6141 are completely complementary to each other (i.e., the second movable cam 613 and the second fixed cam 614 are completely engaged), and at this time, a first predetermined distance D1 exists between the first nut 511 and the first fixed cam 514, and a second predetermined distance D2 exists between the second nut 611 and the second fixed cam 614. The degree of tightness between the first bowl-shaped washers 512 at the first predetermined distance D1 is defined as a first bottom value, and the first torque is the first bottom value. The degree of tightening between the second bowl-shaped washers 612 at the second predetermined distance D2 is defined as a second bottom value, and the second torsion is the second bottom value at this time. The first preset distance D1 can be changed by adjusting the first screw 511, so as to adjust the degree of tightening of the first bowl-shaped washer 512 (i.e. the degree of tightening when the first bowl-shaped washer is kept at the first position without actuation), so as to change the magnitude of the first bottom end value, and further adjust the magnitude of the first torsion (i.e. the preset value of the first torsion) at the first position, for example, the smaller the first preset distance D1, the larger the preset value of the first torsion, and vice versa. Similarly, the second preset distance D2 can be changed by adjusting the second screw 611, thereby adjusting the degree of tightening of the second bowl-shaped washer 612 (i.e. the degree of tightening when the second bowl-shaped washer is maintained at the first position without being actuated) to change the magnitude of the second bottom end value, and further adjust the magnitude of the second torsion (i.e. the preset value of the second torsion) when the second bowl-shaped washer is at the first position, for example, the smaller the second preset distance D2, the larger the preset value of the second torsion, and vice versa.

In addition, a first distance T1 is provided between the first nut 521 and one of the first retaining washers 523 adjacent to the first bowl-shaped washer 524, and the first friction plate 522 between the first nut 521 and the first retaining washer 523 has a predetermined tightness. A second distance T2 is provided between the second nut 621 and one of the second stop washers 623 adjacent to the second bowl washer 624, and the second friction plate 622 between the second nut 621 and the second stop washer 623 also has a predetermined tightness. The first distance T1 can be changed by adjusting the first nut 521 to adjust the preset tightness of the first friction plate 522, for example, the smaller the first distance T1 is, the larger the preset tightness is, and the smaller the preset tightness is, otherwise. Similarly, the second distance T2 can be changed by adjusting the second nut 621 to adjust the preset tightness of the second friction plate 622, for example, the smaller the second distance T2, the larger the preset tightness, and vice versa.

When the carrier 4 is rotated about the first axis X1 with respect to the protruding neck 31 and the shaft 32 to change from the first position to the second position by applying an external force F, as shown in fig. 8A and 8B, the first movable cam 513 does not rotate with respect to one of the extension sections 322 of the shaft 32, the first fixed cam 514 rotates with the carrier 4 and pushes the first movable cam 513, the first protrusion 5141 gradually disengages from the first concave area 5132 and gradually abuts against the first convex area 5133, thereby the first movable cam 513 slides along the shaft 32 and gradually approaches the first nut 511, and gradually presses the first bowl-shaped washer 512, so that the deformation degree of the first bowl-shaped washer 512 is gradually increased (is more compressed), and the first torque force is gradually increased. At the same time, the first stop washer 523 is linked to the carrier 4, and the first friction plate 522 does not rotate relative to the shaft 32, but rubs against the adjacent first stop washer 523 by rotating relative to it. Similarly, the second movable cam 613 does not rotate relative to the other one of the extension sections 322 of the shaft 32, and the second fixed cam 614 rotates in conjunction with the carrier 4 and pushes the second movable cam 613, and the second protrusion 6141 gradually disengages from the second concave area 6132 and gradually abuts against the second convex area 6133, so that the second movable cam 613 slides along the shaft 32 and gradually approaches the second nut 611, and gradually presses the second bowl-shaped washer 612, so that the deformation degree of the second bowl-shaped washer 612 gradually increases (is more compressed), and the second torsion force gradually increases. At the same time, the second stop washer 623 is linked to the carrier 4, and the second friction plate 622 does not rotate relative to the shaft 32, but rotates relative to the adjacent second stop washer 623 to rub against it. When the external force F is removed, the carrier 4 is stopped at an arbitrary position between the first position and the second position.

In summary, if the carrier 4 is changed to rotate about the first axis X1 with respect to the protruding neck 31 and the shaft 32 and is changed from the second position to the first position, i.e. from fig. 8A to fig. 7A, the first protrusion 5141 will gradually disengage from the first protruding area 5133 and gradually return to the first concave area 5132 from the embodiment abutting against the first protruding area 5133, so that the first bowl-shaped washer 512 elastically pushes the first movable cam 513 to slide along the shaft 32 and gradually move away from the first nut 511, the deformation degree of the first bowl-shaped washer 512 is gradually reduced, and the first torsion force is gradually reduced. At the same time, the first stop washer 523 is linked to the carrier 4, and the first friction plate 522 does not rotate relative to the shaft 32, but rubs against the adjacent first stop washer 523 by rotating relative to it. Similarly, the second protruding block 6141 will gradually disengage from the second protruding area 6133 and gradually return to the second recessed area 6132 from the embodiment abutting against the second protruding area 6133, whereby the second bowl-shaped washer 612 elastically pushes the second movable cam 613 to slide along the shaft 32 and gradually move away from the second nut 611, the deformation degree of the second bowl-shaped washer 612 gradually decreases, and the second torsion force gradually decreases. At the same time, the second stop washer 623 is linked to the carrier 4, and the second friction plate 622 does not rotate relative to the shaft 32, but rotates relative to the adjacent second stop washer 623 to rub against it. When the external force F is removed, the carrier 4 is stopped at an arbitrary position between the first position and the second position.

In addition to adjusting the tilt angle of the display 2000, the present application can also change the display 2000 to a swinging state or a yawing state, as shown in fig. 7A, the main plate 43 can rotate relative to the extension member 3, the first frame 41 and the second frame 42 via a third axis X3, so that the display 2000 mounted on the main plate 43 can be switched between a swinging position and a yawing position, and the friction ring 26 can reduce the abrasion of the main plate 43 and other elements during the rotation. When the supporting board unit 4 is in the second position, as shown in fig. 8A, the second axis X2 coincides with the third axis X3. In addition, the above-mentioned embodiment of the second position of the present application is described by the supporting member 4 being perpendicular to the protruding neck 31, but not limited thereto, the second position of the present application can also be an embodiment in which the supporting member 4 is rotated to the upper edge and the lower edge thereof is further away from the upright 2.

In summary, the supporting device of the present application can independently adjust the first torque force constantly provided by the first elastic set and independently adjust the preset tightening degree of the first friction plate in the first friction set by the independent design of the first nut having the first nut in the first elastic set, which is different from the first nut in the first elastic set. Similarly, the second torque force constantly provided by the second elastic group can be independently adjusted and the preset tightness degree of the second friction plate in the second friction group can be independently adjusted through the independent design of the second nut which is different from the second nut which is provided with the second nut in the second elastic group. Therefore, the torque force and the friction force of the supporting device can be independently operated, and the supporting device can be applied to different combinations of increasing and decreasing of the torque force and the friction force and the like. In addition, this application strutting arrangement is through all overlapping first elasticity group, second elasticity group and first friction group, the design that the axostylus axostyle was located and the first frame of holding was located to second friction group, and through first elasticity group, the first fixed cam in the second elasticity group, second fixed cam and first movable cam, second movable cam causes first bowl type china, the deformation of second bowl type china obtains the design of resilience force, can improve the current problem that adopts torsion spring to cause and hold the bulky thing of carrier, effectively reduce the whole thickness that holds the thing, and can satisfy the torsion demand of large-size display simultaneously.

Claims

1. A supporting device for carrying a display and being disposed on a working surface, the supporting device comprising:

a column extending substantially in a direction of gravity and including an opening;

the extending piece comprises a convex neck and a shaft lever, the convex neck is arranged on the upright post and partially extends outwards from the opening, and the shaft lever is fixedly arranged on the convex neck along a first axis;

the bearing piece is used for bearing the display, can be tilted and transformed between a first position and a second position relative to the convex neck by taking the first axis as an axis, and comprises a first frame which is pivotally sleeved on the shaft rod; and

a first torque unit comprising:

a first elastic set sleeved on the shaft rod and constantly providing a first torsion, wherein the first elastic set is provided with a first nut, when the bearing element is positioned at the first position, the first torsion is a first bottom end value, the first bottom end value can be changed by adjusting the first nut, and when the bearing element is changed from the first position to the second position, the first torsion is gradually increased; and

the first friction group is arranged at intervals with the first elastic group and is provided with at least one first friction plate and a first nut which are sleeved on the shaft rod, and a preset tightness of the first friction plate can be changed by adjusting the first nut;

when an external force is applied, the bearing piece can be tilted and transformed between the first position and the second position, the first torque changes correspondingly, the first friction plate generates friction, and when the external force is removed, the bearing piece stops at any position between the first position and the second position.

2. The support device as claimed in claim 1, wherein the first friction pack further has at least one first stop washer sleeved on the shaft rod, the first stop washer is fixed to the first frame, and the first friction plate is located between the first stop washer and the first nut.

3. The supporting device as claimed in claim 2, wherein the first elastic assembly further comprises a first fixed cam, a first movable cam and at least one first bowl-shaped washer sleeved on the shaft, when the supporting member is moved from the first position to the second position, the deformation degree of the first bowl-shaped washer is gradually increased to gradually increase the first torsion, and when the supporting member is moved from the second position to the first position, the deformation degree of the first bowl-shaped washer is gradually decreased to gradually decrease the first torsion.

4. The supporting device as claimed in claim 3, wherein the first frame has a first receiving slot, a first fixing portion and a first limiting portion, the first elastic set and the first friction set are received in the first receiving slot together, the first stop washer is fixed to the first fixing portion, the first fixed cam is fixed to the first limiting portion, and the first stop washer and the first fixed cam can rotate along with the supporting member relative to the shaft.

5. The supporting device as claimed in claim 4, wherein the first fixed cam, the first movable cam, the first bowl-shaped washer and the first nut are sequentially sleeved on the shaft rod, and the degree of the first bowl-shaped washer can be adjusted by adjusting the first nut to change a first predetermined distance between the first nut and the first fixed cam; the first stop washer, the first friction plate and the first nut are sequentially sleeved on the shaft rod, and the preset tightness of the first friction plate can be adjusted by adjusting the first nut to change a first distance between the first nut and the first stop washer.

6. The support device as claimed in claim 5, wherein the shaft has a non-circular cross-section, the first movable cam has a first through hole matching the non-circular cross-section, and when the carrier rotates relative to the shaft, the first movable cam does not rotate relative to the shaft but slides on the shaft along the first axis, thereby changing the deformation degree of the first bowl-shaped washer.

7. The support device as claimed in claim 6, wherein the first fixed cam has two first protrusions spaced apart from each other, the first movable cam has two first concave regions and two first convex regions, the first convex regions are respectively formed between the first concave regions, when the supporting member is located at the first position, the first concave regions and the first protrusions are completely complementary to each other, when the supporting member is located at the second position, the first convex regions and the first protrusions are completely abutted against each other, when the supporting member is tilted from the first position to the second position, the first protrusions are gradually separated from the first concave regions and gradually abut against the first convex regions, whereby the first movable cam is gradually brought closer to the first nut and gradually presses the first bowl-shaped washer more, when the supporting member is tilted from the second position to the first position, the first convex block is gradually separated from the first convex area and gradually returns to the first concave area, and the first bowl-shaped washer elastically pushes the first movable cam to be gradually far away from the first screw cap.

8. The supporting device as claimed in claim 7, wherein the first frame further has a first body, two first plates and a first engaging block, the first body and the first plates surround and define the first receiving slot, the first fixing portion is formed on the first body, the first limiting portion is formed on the first engaging block, the first plates are respectively connected to two sides of the first body and extend outward, the first body has a first axial hole for the shaft rod to pass through, the first engaging block passes through the first receiving slot and has a first upper block and a first lower block, the first upper block is fixed on one of the first plates, and the first lower block is fixed on the other of the first plates.

9. The supporting device as claimed in claim 8, wherein the first upper block has a first upper groove, the first lower block has a first lower groove, the first upper groove and the first lower groove jointly define the first position-limiting portion, the first cam further has two first protruding tongues, the first protruding tongues are respectively disposed on the first upper groove and the first lower groove, the number of the first bowl-shaped washers is even, each first bowl-shaped washer has a first protruding surface, the first protruding surfaces of any two adjacent first bowl-shaped washers face to opposite directions, the first retaining washer has two first positioning hooks, the first body further has two first grooves, the first grooves jointly define the first fixing portion, the first positioning hooks are respectively disposed on the first grooves correspondingly, the supporting device comprises a main plate, a first lower plate, and a first positioning portion, The main board is provided with an accommodating space, the second frame is pivotally sleeved on the shaft rod, the front board and the rear board are respectively connected with two opposite sides of the first frame and the second frame, the first torsion unit, the first frame and the second frame are arranged in the accommodating space, and the main board can rotate relative to the extension piece, the first frame and the second frame by a third axis and enables the display to be converted between a vertical swing position and a horizontal swing position.

10. The support device of claim 9, further comprising a second torsion unit, the second torsion unit comprising:

a second elastic set, which is sleeved on the shaft lever, constantly provides a second torsion and is provided with a second screw cap, when the bearing piece is positioned at the first position, the second torsion is a second bottom end value, the second bottom end value can be changed by adjusting the second screw cap, and when the bearing piece is changed from the first position to the second position, the second torsion is gradually increased; and

the second friction group is arranged at intervals with the second elastic group and is provided with at least one second friction plate and a second nut which are sleeved on the shaft rod, and a preset tightness of the second friction plate can be changed by adjusting the second nut;

when an external force is applied, the bearing piece can be tilted and transformed between the first position and the second position, the second torsion force is correspondingly changed, the second friction plate generates friction, and when the external force is removed, the bearing piece is stopped at any position between the first position and the second position.

11. The supporting device as claimed in claim 10, wherein the second friction set further has at least a second stop washer sleeved on the shaft rod, the second stop washer is fixed to the second frame, the second friction plate is located between the second stop washer and the second nut, the second elastic set further has a second fixed cam, a second movable cam and at least a second bowl washer sleeved on the shaft rod, the second movable cam has a second through hole matching with the non-circular cross-section of the shaft rod, when the carrier rotates relative to the shaft rod, the second movable cam does not rotate relative to the shaft rod but can slide on the shaft rod along the first axis, thereby changing the deformation degree of the second bowl washer, when the carrier changes from the first position to the second position, the deformation degree of the second bowl washer gradually increases, and the second torsion force is gradually increased, and when the bearing piece is changed from the second position to the first position, the deformation degree of the second bowl-shaped washer is gradually reduced, so that the second torsion force is gradually decreased.

12. The supporting device as claimed in claim 11, wherein the second frame has a second receiving slot, a second fixing portion and a second limiting portion, the second elastic assembly and the second friction assembly are received in the second receiving slot together, the second stop washer is fixed to the second fixing portion, the second fixed cam is fixed to the second limiting portion, the second stop washer and the second fixed cam can rotate along with the supporting member relative to the shaft rod, the second fixed cam, the second movable cam, the second bowl washer and the second nut are sequentially sleeved on the shaft rod, and the preset degree of the second bowl washer can be adjusted by adjusting the second nut to change a second preset distance between the second nut and the second fixed cam; the second stop washer, the second friction plate and the second nut are sequentially sleeved on the shaft lever, the preset tightness of the second friction plate can be adjusted by adjusting the second nut and changing a second spacing between the second nut and the second stop washer, the second fixed cam is provided with two second convex blocks which are spaced, the second movable cam is provided with two second concave areas and two second convex areas, the second convex areas are respectively and correspondingly formed between the second concave areas, when the bearing piece is positioned at the first position, the second concave areas and the second convex blocks are completely and correspondingly complemented with each other, when the bearing piece is positioned at the second position, the second convex areas and the second convex blocks are completely and correspondingly propped against each other, when the bearing piece is tilted and changed from the first position to the second position, the second convex blocks are gradually separated from the second concave areas and are gradually propped against the second convex areas, borrow this second movable cam gradually is close to this second nut to extrude gradually more the second bowl type china, when this holds carrier and changes to incline towards this first position from this second position, the second lug breaks away from gradually the second protruding district and gets back gradually the second depressed area, second bowl type china pushes up this second movable cam and keeps away from this second nut gradually elastically.

13. The supporting device as claimed in claim 12, wherein the second frame further has a second body, two second plate bodies and a second engaging block, the second body and the second plate bodies surround and define the second receiving slot, the second fixing portion is formed on the second body, the second limiting portion is formed on the second engaging block, and the second plate bodies are respectively connected to two sides of the second body and extend outward; the second body is provided with a second shaft hole for the shaft lever to pass through, the second clamping block penetrates through the second accommodating groove and is provided with a second upper block body and a second lower block body, the second upper block body is fixedly arranged on one of the second plate bodies, the second lower block body is fixedly arranged on the other of the second plate bodies, the second upper block body is provided with a second upper groove, the second lower block body is provided with a second lower groove, the second upper groove and the second lower groove jointly define the second limiting part, the second fixed cam is also provided with two second convex tongues, the second convex tongues are respectively and correspondingly arranged on the second upper groove and the second lower groove, the number of the second bowl-shaped washers is even, each second bowl-shaped washer is respectively provided with a second convex surface, the second convex surfaces of any two adjacent second bowl-shaped washers face to opposite directions, and the second locking washer is provided with second positioning hooks, the second body is also provided with two second grooves which jointly define the second fixing part, and the second positioning hooks are respectively and correspondingly arranged in the second grooves.