Rotary support

Abstract

The utility model relates to a rotary support which comprises a support body, a screen installation plate connected with the support body and a rotary assembly arranged between the screen installation plate and the support body, the rotary assembly comprises a fixed plate, a rotary plate connected with the fixed plate and balls arranged between the fixed plate and the rotary plate, the fixed plate is fixedly arranged on the support body, and the rotary plate is fixedly arranged on the support body. The fixing plate is provided with a first annular groove, the rotating plate is provided with a second annular groove, the first annular groove and the second annular groove surround to form a ball track, the balls are embedded in the ball track, the rotating plate is rotationally connected with the fixing plate and fixedly connected with the screen mounting plate, and the end, away from the screen mounting plate, of the support body is provided with a roller. The device does not need to be influenced by site environment and is more convenient for a user to use; a user can rotate and adjust the angle of the electronic display screen according to own actual needs, the user can use the electronic display screen more conveniently, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of display mobile brackets, in particular to a rotating bracket. Background Art

[0002] In the fast-paced life of modern cities, advertisements are everywhere. The promotion of any product cannot be separated from advertisements. The most common way to present advertisements on electronic display screens is usually in public places such as shopping malls. The purpose of advertising is to let potential customers know about the goods or services to be promoted. If the target of the advertisement does not notice the advertisement, then the advertisement is meaningless to the user.

[0003] The installation of electronic display screens is inseparable from brackets, but existing electronic display screen brackets are generally designed to be wall-mounted. In this way, the placement of the electronic display screen is easily restricted by the site environment, resulting in the electronic display screen not being placed where the user most wants to place it. Therefore, it is very necessary to develop an electronic display screen bracket that is not affected by the site environment. Utility Model Content

[0004] Based on this, it is necessary to provide a rotating bracket to address the problem that the existing bracket is wall-mounted, which makes the placement of the electronic display screen easily restricted by the site environment.

[0005] A rotating bracket comprises a bracket body, a screen mounting plate connected to the bracket body and a rotating assembly arranged between the screen mounting plate and the bracket body, the rotating assembly comprises a fixed plate, a rotating plate connected to the fixed plate and a ball disposed between the fixed plate and the rotating plate, the fixed plate is fixedly mounted on the bracket body, the fixed plate is provided with a first annular groove, the rotating plate is provided with a second annular groove, the first annular groove and the second annular groove are surrounded to form a ball track, the ball is embedded in the ball track, the rotating plate is rotatably connected to the fixed plate, the rotating plate is fixedly connected to the screen mounting plate, and a roller is provided at the end of the bracket body away from the screen mounting plate.

[0006] The above-mentioned rotating bracket is provided with a roller at the end of the bracket body, so that the electronic display screen is installed on the rotating bracket and can be moved anywhere without being affected by the site environment, thereby being more convenient for users to use; by providing a rotating component between the bracket body and the screen mounting plate, the user can rotate and adjust the angle of the electronic display screen according to their actual needs, which is more convenient and practical for users to use.

[0007] In one of the embodiments, the rotating plate is provided with a first mounting hole, the fixed plate is provided with a second mounting hole, the rotating disk is rotatably mounted on the fixed plate after a bolt passes through the first mounting hole and the second mounting hole and cooperates with a nut, and the rotating disk rotates around the bolt; the rotating plate is provided with a first abutment platform, the fixed plate is provided with a second abutment platform, the first abutment platform and the second abutment platform abut against each other, the first mounting hole is provided on the first abutment platform, and the second mounting hole is provided on the second abutment platform.

[0008] In one of the embodiments, the bracket body is provided with a limit column, and there are two limit columns. The two limit columns are diagonally arranged on both sides of the fixing plate, and a limit platform is arranged at the end of the limit column away from the bracket body. The screen mounting plate is provided with a limit hole, and the limit platform is inserted into the limit hole.

[0009] In one embodiment, the distance between the two limiting columns is greater than the diagonal length of the rotating plate.

[0010] In one of the embodiments, the rotating bracket also includes an anti-rotation component, which includes a mounting plate, a stop arm connected to the mounting plate, a swing shaft connected to the stop arm, and an elastic member arranged between the stop arm and the mounting plate. The mounting plate is fixedly connected to the bracket body, the mounting plate is arranged at the four corners of the fixed plate, the swing shaft is fixedly mounted on the mounting plate, the stop arm is hinged to the swing shaft, one end of the elastic member is fixedly connected to the mounting plate, the other end of the elastic member is fixedly connected to the end of the stop arm, the mounting plate is provided with a slot, and the limit column passes through the slot and is fixedly connected to the bracket body.

[0011] In one embodiment, the bracket body includes a herringbone frame body and a hanging frame body connected to the herringbone frame body. There are two herringbone frames, which are arranged on both sides of the hanging frame body. Rollers are arranged at the end of the herringbone frame away from the hanging frame body.

[0012] In one embodiment, the bracket body includes two support rods, a mounting bar arranged between the two support rods, and a baffle plate arranged at the end of the mounting bar. There are two mounting bars, and the two mounting bars are arranged in parallel between the two support rods. The fixing plate and the mounting plate are fixedly connected to the mounting bar, and the limiting column is fixedly connected to the baffle plate.

[0013] In one of the embodiments, a connecting block is provided at the end of the A-frame away from the roller, the connecting block is provided with a screw hole, the end of the support rod away from the mounting bar is clamped outside the connecting block, the end of the support rod away from the mounting bar is provided with a through hole, and the support rod is detachably connected to the bracket body by bolts passing through the through holes and cooperating with the screw holes.

[0014] In one embodiment, a storage plate is provided between the two frame bodies.

[0015] In one of the embodiments, the roller is provided with a brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an assembly structure diagram of an embodiment of the utility model;

[0017] Figure 2 An exploded view of an embodiment of the present utility model;

[0018] Figure 3 It is an assembly cross-sectional view of the fixed plate and the rotating plate of the utility model.

[0019] The meanings of the numbers in the accompanying drawings are:

[0020] 100-swivel bracket;

[0021] 10-bracket body, 11-H-frame body, 111-front frame body, 112-rear frame body, 113-connecting block, 12-hanging frame body, 121-support rod, 122-mounting bar, 123-baffle, 124-limiting column, 1241-limiting platform;

[0022] 20-screen mounting plate, 21-mounting slot, 22-third fixing hole, 23-fourth fixing hole, 24-limiting hole;

[0023] 30-rotating assembly, 31-fixed plate, 311-first outer convex ring, 312-first inner convex ring, 313-first annular groove, 314-first abutting platform, 315-first adjusting hole, 316-first inclined surface, 317-first mounting hole, 32-rotating plate, 321-second outer convex ring, 322-second inner convex ring, 323-second annular groove, 324-second abutting platform, 325-second adjusting hole, 326-second inclined surface, 327-second mounting hole;

[0024] 40-anti-rotation assembly, 41-mounting plate, 411-slot, 42-blocking arm, 421-dispatch groove, 422-guide slope, 43-swing shaft, 44-elastic member, 45-first fixed shaft, 46-second fixed shaft, 47-limiting shaft;

[0025] 50-roller, 51-brake;

[0026] 60-storage board, 61-front support board, 62-rear support board. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0033] See also Figures 1 to 3 , is an embodiment of the utility model: a rotating bracket 100, comprising a bracket body 10, a screen mounting plate 20 connected to the bracket body 10, a rotating assembly 30 disposed between the screen mounting plate 20 and the bracket body 10, and an anti-rotation assembly 40 connected to the bracket body 10. The rotating bracket 100 is used to install an electronic display screen, so as to facilitate placing the electronic display screen in public places such as squares, corridors, hospitals, shopping malls, etc.

[0034] The bracket body 10 includes a herringbone frame body 11 and a hanging frame body 12 connected to the herringbone frame body 11. The herringbone frame body 11 is two, and the two herringbone frame bodies 11 are arranged correspondingly along the left and right directions. The herringbone frame body 11 includes a front frame body 111 and a rear frame body 112 that are hinged to each other. The lower ends of the front frame body 111 and the rear frame body 112 are both provided with rollers 50, and the rollers 50 are provided with brakes 51; the upper end of the front frame body 111 is integrally connected with a connecting block 113, and the connecting block 113 is in the shape of a rectangular parallelepiped. The connecting block 113 is provided with screw holes, and the screw holes are two , two screw holes are arranged correspondingly up and down; a storage plate 60 is arranged between the two herringbone frames 11, and the storage plate 60 is provided with a front support plate 61 and a rear support plate 62. The outer wall of the front support plate 61 is abutted against the inner wall of the front frame body 111, and the outer wall of the rear support plate 62 is abutted against the inner wall of the rear frame body 112. The front support plate 61 and the rear support plate 62 are provided with a first connecting hole, and the front frame body 111 and the rear frame body 112 are provided with a second connecting hole. The storage plate 60 is fixedly arranged between the two herringbone frames 11 by bolts passing through the first connecting hole and the second connecting hole.

[0035] The bracket body 12 includes two support rods 121, a mounting strip 122 disposed between the two support rods 121, and a baffle 123 disposed at the rear end of the mounting strip 122. The support rod 121 is in the shape of a hollow strip. The lower end of the support rod 121 is sleeved outside the connecting block 113. A through hole is disposed at the lower end of the support rod 121. The support rod 121 is detachably connected to the herringbone frame body 11 by passing a bolt through the through hole and cooperating with a screw hole. There are two mounting strips 122, which are disposed parallel to each other between the two support rods 121. The mounting strips 122 are arranged parallel to each other up and down. 122 is provided with a first fixing hole and a second fixing hole, one mounting bar 122 corresponds to two first fixing holes, the two first fixing holes are arranged at intervals on one mounting bar 122, one mounting bar 122 corresponds to four second fixing holes, the four second fixing holes are divided into two groups, the two groups of second fixing holes are arranged on the left and right sides of the two first fixing holes, a limiting column 124 is arranged on the baffle 123, there are two limiting columns 124, the two limiting columns 124 are arranged diagonally, and a limiting platform 1241 is arranged at the front end of the limiting column 124.

[0036] The screen mounting plate 20 is provided with a mounting groove 21 adapted to the electronic display screen. The bottom of the mounting groove 21 is provided with a third fixing hole 22, a fourth fixing hole 23 and a limiting hole 24. The electronic display screen is fixed on the screen mounting plate 20 by bolts passing through the third fixing hole 22 and cooperating with the screw holes thereon. The limiting hole 24 is adapted to the limiting platform 1241.

[0037] The rotating assembly 30 is arranged between the bracket body 10 and the screen mounting plate 20. The rotating assembly 30 includes a fixed plate 31, a rotating plate 32 connected to the fixed plate 31, and a ball disposed between the fixed plate 31 and the rotating plate 32. The fixed plate 31 is provided with a first outer convex ring 311, a first inner convex ring 312, a first abutment platform 314 and a first adjustment hole 315. The first outer convex ring 311 and the first inner convex ring 312 are both protruding forward, the first inner convex ring 312 is arranged on the inner side of the first outer convex ring 311, a first annular groove 313 is arranged between the first outer convex ring 311 and the first inner convex ring 312, the first abutment platform 314 is a truncated table protruding forward, and a groove from front to back is arranged between the first abutment platform 314 and the fixed plate 31. The first inclined surface 316 is inclined outward, and the first abutment platform 314 is axially provided with a first mounting hole 317. The first adjustment holes 315 are provided at the four corners of the fixing plate 31. The first adjustment holes 315 are runway-shaped. The length direction of the first adjustment holes 315 is the diagonal direction of the fixing plate 31. The fixing plate 31 is fixedly mounted on the two mounting strips 122 by bolts passing through the first adjustment holes 315 and cooperating with the first fixing holes. The setting of the first adjustment holes 315 can make the position between the fixing plate 31 and the mounting strip 122 adjustable, making the installation more convenient and effectively improving the installation efficiency. The two limit columns 124 are diagonally arranged on the left and right sides of the fixing plate 31, and the diagonal direction of the two limit columns 124 is the diagonal direction of the fixing plate 31.

[0038] The rotating plate 32 is provided with a second outer convex ring 321, a second inner convex ring 322, a second abutment platform 324 and a second adjustment hole 325. The second outer convex ring 321 and the second inner convex ring 322 both protrude backwards. The second inner convex ring 322 is arranged on the inner side of the second outer convex ring 321. A second annular groove 323 is arranged between the second outer convex ring 321 and the second inner convex ring 322. The second annular groove 323 and the first annular groove 313 form a ball track. The ball is embedded in the ball track. The second abutment platform 324 is a truncated table protruding backwards. A second inclined surface 326 inclined from back to front and outward is arranged between the second abutment platform 324 and the rotating plate 32. A second mounting hole 327 is arranged in the axial direction of the second abutment platform 324. 32 is rotatably connected to the fixed plate 31 by bolts passing through the first mounting hole 317 and the second mounting hole 327 in succession and cooperating with nuts. The rotating plate 32 rotates around the bolts. The distance between the two limit columns 124 is greater than the diagonal length of the rotating plate 32. The second adjustment holes 325 are arranged at the four corners of the rotating plate 32. The second adjustment holes 325 are runway-shaped. The length direction of the second adjustment holes 325 is the diagonal direction of the rotating plate 32. The screen mounting plate 20 is fixed to the front end of the rotating plate 32 by bolts passing through the second adjustment holes 325 and the fourth fixing holes 23 and cooperating with nuts. The setting of the second adjustment holes 325 can make the position between the screen mounting plate 20 and the rotating plate 32 adjustable, making installation more convenient and effectively improving installation efficiency.

[0039] The anti-rotation assembly 40 is installed on the bracket body 12, and the anti-rotation assembly 40 includes a mounting plate 41, a blocking arm 42 connected to the mounting plate 41, a swing shaft 43 connected to the blocking arm 42, and an elastic member 44 arranged between the blocking arm 42 and the mounting plate 41. There are four mounting plates 41, and the four mounting plates 41 are arranged at the four corners of the fixing plate 31. The mounting plate 41 is provided with a screw hole. The mounting plate 41 is fixedly mounted on the mounting bar 122 by bolts passing through the second fixing holes and cooperating with the screw holes. There are two blocking arms 42, swing shafts 43 and elastic members 44. The two blocking arms 42, swing shafts 43 and elastic members 44 are mirror-imaged up and down. The swing shaft 43 is fixedly mounted on the mounting plate 41, and the blocking arm 42 is hinged to the swing shaft 43. The mounting plate 41 is provided with a first fixed shaft 45, and the blocking arm 42 is provided with a second fixed shaft 46. The first fixed shaft 45 and the second fixed shaft 46 are arranged correspondingly up and down. One end of the elastic member 44 is fixedly connected to the first fixed shaft 45, and the other end of the elastic member 44 is fixedly connected to the second fixed shaft 46. In this embodiment, the elastic member 44 is a tension spring, and the mounting plate 41 is provided with a slot 411. The limiting column 124 passes through the slot 411 and is fixedly connected to the baffle 123. The end of the blocking arm 42 away from the second fixed shaft 46 extends into the slot 411, and the blocking arm 42 is provided with a makeshift groove 421 adapted to the limiting column 124. The end of the blocking arm 42 away from the second fixed shaft 46 is provided with a guide slope 422. The guiding slope 422 of the blocking arm 42 at the uppermost end is inclined from top to bottom and outward, while the guiding slope 422 of the blocking arm 42 at the lowermost end is inclined from bottom to top and outward. A limiting shaft 47 is provided on the mounting plate 41. The limiting shaft 47 is disposed at the end of the blocking arm 42 close to the second fixed shaft 46 so that the blocking arm 42 can swing from inside to outside around the swing shaft 43.

[0040] The working principle of the rotating bracket 100 in the utility model is as follows: since the fixed plate 31 is provided with a first annular groove 313, and the rotating plate 32 is provided with a second annular groove 323, the first annular groove 313 and the second annular groove 323 are surrounded to form a ball track, and the ball is embedded in the ball track. In this way, when a heavy display screen is hung on the screen mounting plate 20, the rotating plate 32 and the fixed plate 31 can also rotate smoothly without getting stuck, which is convenient for users to use.

[0041] When the rotating plate 32 rotates and passes through the blocking arm 42, the outer end of the rotating plate 32 cooperates with the guiding slope 422, driving the end of the blocking arm 42 close to the guiding slope 422 to swing outward, and the end of the blocking arm 42 close to the second fixed axis 46 swings in a direction away from the first fixed axis 45, thereby causing the elastic member 44 to produce a tensile deformation. Under the action of the elastic member 44, when the end of the rotating plate 32 leaves the blocking arm 42, the blocking arm 42 is reset. When the rotating plate 32 rotates back to the blocking arm 42, in the absence of external force, the outer end of the rotating plate 32 is stopped by the blocking arm 42, thereby realizing the horizontal limitation of the screen mounting plate 20.

[0042] Every time the screen mounting plate 20 rotates 180°, the limit platform 1241 is snapped into the limit hole 24, thereby realizing the vertical limit of the screen mounting plate 20, which is more convenient for users to use; the two herringbone frames 11 are arranged correspondingly on the left and right, and the hanging frame body 12 is arranged above the two herringbone frames 11. The structure is simple and can effectively improve the stability of the rotating bracket 100; the hanging frame body 12 and the herringbone frame body 11 are detachably connected, which is convenient for disassembly and assembly. During transportation, the multi-part method can effectively reduce the occupied space, thereby reducing transportation costs and facilitating transportation; the setting of the storage plate 60 can effectively improve the stability of the rotating bracket 100 on the one hand, and increase the storage space of the rotating bracket 100 on the other hand; the roller 50 is provided with a brake 51, which can ensure that the rotating bracket 100 can stably stop where the user wants to place it.

[0043] The utility model sets a roller 50 at the end of the bracket body 10, so that the electronic display screen is installed on the rotating bracket 100 and can be moved anywhere without being affected by the site environment, which is more convenient for users to use; by setting a rotating component 30 between the bracket body 10 and the screen mounting plate 20, the user can rotate and adjust the angle of the electronic display screen according to their actual needs, which is more convenient for users to use and has strong practicality.

[0044] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A rotating bracket, characterized in that: It includes a bracket body, a screen mounting plate connected to the bracket body, and a rotating component arranged between the screen mounting plate and the bracket body, the rotating component includes a fixed plate, a rotating plate connected to the fixed plate, and a ball arranged between the fixed plate and the rotating plate, the fixed plate is fixedly mounted on the bracket body, the fixed plate is provided with a first annular groove, the rotating plate is provided with a second annular groove, the first annular groove and the second annular groove are surrounded to form a ball track, the ball is embedded in the ball track, the rotating plate is rotatably connected to the fixed plate, the rotating plate is fixedly connected to the screen mounting plate, and a roller is provided at the end of the bracket body away from the screen mounting plate.

2. A rotating bracket according to claim 1, characterized in that: The rotating plate is provided with a first mounting hole, and the fixed plate is provided with a second mounting hole. The rotating disk is rotatably mounted on the fixed plate after a bolt passes through the first mounting hole and the second mounting hole and cooperates with a nut, and the rotating disk rotates around the bolt; the rotating plate is provided with a first abutment platform, and the fixed plate is provided with a second abutment platform, the first abutment platform and the second abutment platform abut against each other, the first mounting hole is provided on the first abutment platform, and the second mounting hole is provided on the second abutment platform.

3. A rotating bracket according to claim 2, characterized in that: The bracket body is provided with a limiting column, and there are two limiting columns. The two limiting columns are diagonally arranged on both sides of the fixing plate. A limiting platform is arranged at the end of the limiting column away from the bracket body, and the screen mounting plate is provided with a limiting hole, and the limiting platform is inserted into the limiting hole.

4. A rotating bracket according to claim 3, characterized in that: The distance between the two limiting columns is greater than the diagonal length of the rotating plate.

5. A rotating bracket according to claim 4, characterized in that: It also includes an anti-rotation component, which includes a mounting plate, a stop arm connected to the mounting plate, a swing shaft connected to the stop arm, and an elastic member arranged between the stop arm and the mounting plate, the mounting plate is fixedly connected to the bracket body, the mounting plate is arranged at the four corners of the fixed plate, the swing shaft is fixedly mounted on the mounting plate, the stop arm is hinged to the swing shaft, one end of the elastic member is fixedly connected to the mounting plate, the other end of the elastic member is fixedly connected to the end of the stop arm, the mounting plate is provided with a slot, and the limit column passes through the slot and is fixedly connected to the bracket body.

6. A rotating bracket according to claim 5, characterized in that: The bracket body includes a herringbone frame body and a hanging frame body connected to the herringbone frame body. There are two herringbone frame bodies, which are arranged on both sides of the hanging frame body. The roller is arranged at the end of the herringbone frame body away from the hanging frame body.

7. A rotating bracket according to claim 6, characterized in that: The bracket body includes two support rods, a mounting strip arranged between the two support rods, and a baffle arranged at the end of the mounting strip. There are two mounting strips, and the two mounting strips are arranged in parallel between the two support rods. The fixing plate and the mounting plate are fixedly connected to the mounting strip, and the limiting column is fixedly connected to the baffle.

8. The rotating bracket according to claim 7, characterized in that: A connecting block is provided at the end of the herringbone frame away from the roller, and a screw hole is provided on the connecting block. The end of the support rod away from the mounting bar is clamped outside the connecting block, and a through hole is provided at the end of the support rod away from the mounting bar. The support rod is detachably connected to the bracket body by bolts passing through the through holes and cooperating with the screw holes.

9. The rotating bracket according to claim 6, characterized in that: A storage plate is arranged between the two herringbone frames.

10. The rotating bracket according to claim 1, characterized in that: The roller is provided with a brake.

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