CN112493679A

CN112493679A - Art student uses portable outdoor drawing device

Info

Publication number: CN112493679A
Application number: CN202011347087.1A
Authority: CN
Inventors: 闫晓莹
Original assignee: Individual
Current assignee: Yuyao Yitai Image And Picture Device Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-03-16
Anticipated expiration: 2040-11-26
Also published as: CN112493679B

Abstract

The invention relates to the technical field of drawing devices, in particular to a portable outdoor drawing device for artistic students, which comprises a base, wherein a first fixing frame is arranged at the upper end of the base, which is close to the front side, a first rotating shaft is arranged in the first fixing frame in a penetrating manner, a supporting rod is arranged on the outer side surface of the first rotating shaft, an adjusting mechanism is arranged between the base and the supporting rod, the adjusting mechanism comprises a second fixing frame, a second rotating shaft, a clamping rod, a sliding rail and a limiting block, a lower bracket is arranged at the front end of the supporting rod, a drawing board is arranged at the upper end of the lower bracket at the front end of the supporting rod, and a clamping mechanism is arranged at the upper end of the drawing board at the front end of the supporting rod. The application range is wider, the damage of drawing tools caused by rain can be prevented, and the method is more practical.

Description

Art student uses portable outdoor drawing device

Technical Field

The invention relates to the technical field of drawing devices, in particular to a portable outdoor drawing device for an artistic student.

Background

The hand painting is an important professional course for students who are engaged in professional learning such as building, art, garden, environment, photography and visual transmission. In the learning process of the effect diagram, copying is a very important content and link. It is an important index for measuring the hand-drawing ability of college students. Meanwhile, the method has great influence on the graduation and employment of college students. Corresponding to the computer effect picture, an outdoor drawing device is generally needed when an artist copies outdoors.

Outdoor drawing device among the prior art uses there are some shortcomings, and the angle of at first device can not be adjusted, can not adjust the angle of drawing board according to user's actual demand and use custom, and is practical inadequately, and secondly the drawing board of the fixed size of device can only the adaptation, and application scope is narrower, and the receiver of last device is naked state, and when raining suddenly, the rainwater can directly drench the inside of entering the receiver, leads to inside graphics primitive of accomodating to be drenched, and is more troublesome.

Aiming at the problems, the invention designs a portable outdoor drawing device for an artistic student.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a portable outdoor drawing device for an artistic student. The problem is solved as far as possible for art student uses when using and experiences better, and the device can be applicable to and change the drawing board of equidimension not, and application scope is wider, can prevent drawing tool rain damage, and is more practical.

The invention is realized by the following technical scheme:

a portable outdoor drawing device for artistic students comprises a base, wherein a first fixing frame is arranged at the upper end of the base close to the front side, a first rotating shaft is arranged inside the first fixing frame in a penetrating manner, a supporting rod is arranged on the outer side surface of the first rotating shaft, an adjusting mechanism is arranged between the base and the supporting rod, the adjusting mechanism comprises a second fixing frame, a second rotating shaft, clamping rods, a sliding rail and a limiting block, a lower bracket is arranged at the front end of the supporting rod, a drawing board is arranged at the upper end of the lower bracket at the front end of the supporting rod, a clamping mechanism is arranged at the upper end of the drawing board at the front end of the supporting rod, the clamping mechanism comprises a fixed block, a movable rod, a limiting block, a locking knob, a spring and an upper clamping board, two groups of supporting rods are arranged, a connecting rod is arranged between the two groups of supporting rods, the storage mechanism comprises a storage basket, a drawer bucket, a partition plate and a handle.

Preferably, the rear end surface of bracing piece is provided with the second mount, the inside of second mount is run through and is provided with the second axis of rotation, the outside surface of second axis of rotation is provided with the kelly, the inside sky of the upper end of base is provided with the slide rail, the inboard of slide rail is provided with the stopper.

Preferably, the front end fixed connection of second mount is at the rear end surface of bracing piece, the inside swing joint of second axis of rotation and second mount, the inside swing joint in upper end of second axis of rotation and kelly, the slide rail is seted up at the inside rear side that is close to first mount in the upper end of base, the inside fixed connection of stopper and slide rail, the quantity of stopper is five groups, five groups the stopper be linear arrangement.

Preferably, the top that the front end surface of bracing piece is close to the drawing board is provided with the fixed block, the inside of fixed block is run through and is provided with the movable rod, the upper end surface of movable rod is provided with the restriction piece, the inside locking knob that is provided with that runs through of front end of fixed block, the downside that the outside surface of movable rod is close to the fixed block is provided with the spring, the lower extreme surface of movable rod is provided with the cardboard.

Preferably, the rear end surface of fixed block and the front end external surface fixed connection of bracing piece, the surface of movable rod and the inside surface swing joint of fixed block, the lower extreme surface of restriction piece and the upper end external surface fixed connection of movable rod, the outside surface at the movable rod is cup jointed to the inboard surface of locking knob, the surface of spring and the front end internal thread of fixed block are connected, the rear end of spring extends to the front end of movable rod, the upper end surface of going up the cardboard is connected with the lower extreme external surface fixed connection of movable rod.

Preferably, a storage basket is arranged between the two groups of support rods, a drawer bucket is arranged on the inner side surface of the storage basket, a partition plate is arranged inside the drawer bucket, and a handle is arranged on the outer surface of the front end of the drawer bucket.

Preferably, the storage basket is fixedly arranged between the two groups of support rods, the outer surface of the drawer bucket is movably connected with the inner side surface of the storage basket, the partition plate is fixedly connected to the inner side surface of the drawer bucket, and the outer surface of the rear end of the handle is fixedly connected with the outer surface of the front end of the drawer bucket.

Preferably, the lower extreme surface of base is provided with the gyro wheel frame, gyro wheel frame internal surface is provided with the roller shaft, the outside surface of roller shaft is provided with the gyro wheel, the upper end of gyro wheel frame and the lower extreme fixed connection of base, the surface of roller shaft and the internal surface swing joint of gyro wheel frame, the surface of roller shaft and the internal surface swing joint of gyro wheel, the gyro wheel passes through swing joint between roller shaft and the gyro wheel frame, the lower extreme of first mount and the upper end fixed connection of base, the surface of first axis of rotation and the internal surface swing joint of first mount, the bracing piece passes through swing joint between first axis of rotation and the first mount, the rear end surface of lower carriage and the front end external surface fixed connection of bracing piece.

The invention has the beneficial effects that: the support rod is rotated by rotating the support rod to rotate the support rod at the inner side of the first fixing frame by taking the first rotating shaft as an axis, so as to achieve the purpose of adjusting the angle of the support rod, the clamping rod is rotated at the inner side of the second fixing frame by taking the second rotating shaft as an axis by rotating the clamping rod, so as to achieve the purpose of clamping the lower end of the clamping rod at the front end of the limit block inside the slide rail, the support rod can be supported and fixed by the clamping rod, the adjusting mode is flexible, the drawing experience of a user can be better by adjusting the angle of the drawing board, in addition, when a larger drawing board needs to be replaced, the movable rod moves upwards at the inner side of the fixing block by upwards pulling the limit block, the upper clamping plate can be driven to move upwards by the movable rod, the spring can be compressed by the upper clamping plate moving upwards, and the locking knob is screwed to fix the movable rod at, then a bigger drawing board is placed on the lower side of the upper clamping plate on the upper end of the lower bracket, the locking knob is screwed to loosen the movable rod and the fixed block, the spring restores to push the upper clamping plate and the movable rod to move downwards under the action of the elasticity of the spring, the drawing board can be clamped between the upper clamping plate and the lower bracket through the downward movement of the upper clamping plate, the drawing boards with different sizes can be replaced according to actual requirements, the drawing device is more flexible and has wider application range, and finally the drawing tool is exposed outside when the drawing tool is stored in the conventional storage device, when the storage mechanism is used, the drawer bucket is driven to slide out of the inner side of the storage basket through pulling the handle, the drawing tool is placed on the inner side of the drawer bucket, the drawing tool can be stored while the drawing tool can be prevented from being damaged due to the fact that rainwater is poured into the inner part of the drawer bucket in rainy days, and the effects of, in addition, the lower end of the clamping rod is taken out from the inside of the sliding rail, the clamping rod is rotated by taking the second rotating shaft as the shaft, the clamping rod is rotated to the position between the clamping rod and the supporting rod, the supporting rod is rotated by taking the first rotating shaft as the shaft, the inner side of the supporting rod and the base is conveniently taken down, the drawing board is taken down to be placed between the first fixing frame and the second fixing frame, the clamping mechanism is taken down between the supporting rod and the base, the whole device can be conveniently folded and stored, and the whole device is convenient to carry when the outdoor drawing is carried.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is a schematic view of a portion of the present invention;

FIG. 3 is an enlarged view of part A of the present invention;

FIG. 4 is a schematic view of a partial structure of the present invention;

FIG. 5 is an enlarged view of the portion B of the present invention;

fig. 6 is a schematic structural view of the storage mechanism of the present invention.

In the figure: 1. a base; 2. a roller frame; 3. a roller shaft; 4. a roller; 5. a first fixing frame; 6. a first rotating shaft; 7. a support bar; 8. an adjustment mechanism; 81. a second fixing frame; 82. a second rotating shaft; 83. a clamping rod; 84. a slide rail; 85. a limiting block; 9. a lower bracket; 10. drawing boards; 11. a clamping mechanism; 111. a fixed block; 112. a movable rod; 113. a limiting block; 114. a locking knob; 115. a spring; 116. an upper clamping plate; 12. a connecting rod; 13. a storage mechanism; 131. a storage basket; 132. a drawer bucket; 133. a partition plate; 134. a handle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, a portable outdoor drawing device for artistic students comprises a base 1, a first fixing frame 5 is disposed at the upper end of the base 1 near the front side, a first rotating shaft 6 is disposed inside the first fixing frame 5, a support rod 7 is disposed on the outer side surface of the first rotating shaft 6, an adjusting mechanism 8 is disposed between the base 1 and the support rod 7, the adjusting mechanism 8 comprises a second fixing frame 81, a second rotating shaft 82, a clamping rod 83, a sliding rail 84, and a limit block 85, a lower bracket 9 is disposed at the front end of the support rod 7, a drawing board 10 is disposed at the upper end of the lower bracket 9 at the front end of the support rod 7, a clamping mechanism 11 is disposed at the upper end of the drawing board 10 at the front end of the support rod 7, the clamping mechanism 11 comprises a fixed block 111, a movable rod 112, a limit block 113, a locking knob 114, a spring 115, and an upper clamping board 116, the number of the support, between the two sets of gripping mechanisms 11, a storage mechanism 13 is provided on the upper side of the connecting rod 12, and the storage mechanism 13 includes a storage basket 131, a drawer bucket 132, a partition plate 133, and a handle 134.

Referring to fig. 1 to 3, a second fixing frame 81 is disposed on an outer surface of a rear end of the supporting rod 7, a second rotating shaft 82 penetrates through the second fixing frame 81, a clamping rod 83 is disposed on an outer surface of the second rotating shaft 82, a sliding rail 84 is hollowed in an upper end of the base 1, a limiting block 85 is disposed on an inner side of the sliding rail 84, a front end of the second fixing frame 81 is fixedly connected to the outer surface of the rear end of the supporting rod 7, the second rotating shaft 82 is movably connected to the inner portion of the second fixing frame 81, the second rotating shaft 82 is movably connected to an upper end of the clamping rod 83, the sliding rail 84 is disposed inside the upper end of the base 1 and close to a rear side of the first fixing frame 5, the limiting blocks 85 are fixedly connected to the inner portion of the sliding rail 84, the limiting blocks 85 are five groups, the limiting blocks 85 of the five groups are linearly arranged, the supporting rod 7 is rotated around the first, thereby reach the purpose of the angle of adjusting support pole 7, thereby the rethread rotates kelly 83 and makes kelly 83 use second axis of rotation 82 to rotate as the axle at the inboard of second mount 81 and reach the front end at the stopper 85 of the lower extreme card of kelly 83 in the inside of slide rail 84, can support bracing piece 7 through kelly 83 and fix, the regulation mode is more nimble, the angle through adjusting drawing board 10 can make the user experience of drawing better.

Referring to fig. 4 to 5, a fixed block 111 is disposed on an outer surface of a front end of the support rod 7 near the upper side of the drawing board 10, a movable rod 112 is disposed inside the fixed block 111 in a penetrating manner, a limiting block 113 is disposed on an outer surface of an upper end of the movable rod 112, a locking knob 114 is disposed inside a front end of the fixed block 111 in a penetrating manner, a spring 115 is disposed on an outer surface of the movable rod 112 near a lower side of the fixed block 111, an upper clamping plate 116 is disposed on an outer surface of a lower end of the movable rod 112, an outer surface of a rear end of the fixed block 111 is fixedly connected with an outer surface of the front end of the support rod 7, an outer surface of the movable rod 112 is movably connected with an inner surface of the fixed block 111, an outer surface of a lower end of the limiting block 113 is fixedly connected with an outer surface of an upper end of the movable rod 112, an inner surface of the, the outer surface of the upper end of the upper clamping plate 116 is fixedly connected with the outer surface of the lower end of the movable rod 112, the limiting block 113 is pulled upwards, the movable rod 112 moves upwards on the inner side of the fixed block 111, the movable rod 112 can drive the upper clamping plate 116 to move upwards through the upward movement of the movable rod 112, the spring 115 can be compressed through the upward movement of the upper clamping plate 116, the locking knob 114 is screwed, the movable rod 112 is fixed on the inner side of the fixed block 111 through the locking knob 114, the purpose of fixing the upper clamping plate 116 is achieved, the larger drawing board 10 is placed on the lower side of the upper clamping plate 116 on the upper end of the lower bracket 9, the locking knob 114 is screwed at the moment to enable the movable rod 112 and the fixed block 111 to be loosened, the spring 115 restores to the original shape under the action of the spring 115 to push the upper clamping plate 116 and the movable rod 112 to move downwards, and the.

Referring to fig. 1 and 6, a storage basket 131 is disposed between two sets of support rods 7, a drawer bucket 132 is disposed on an inner side surface of the storage basket 131, a partition plate 133 is disposed inside the drawer bucket 132, a handle 134 is disposed on an outer surface of a front end of the drawer bucket 132, the storage basket 131 is fixedly mounted between the two sets of support rods 7, an outer surface of the drawer bucket 132 is movably connected with the inner side surface of the storage basket 131, the partition plate 133 is fixedly connected to the inner side surface of the drawer bucket 132, an outer surface of a rear end of the handle 134 is fixedly connected with the outer surface of the front end of the drawer bucket 132, the drawer bucket 132 is driven to slide out of the inner side of the storage basket 131 by pulling the handle 134, and a drawing tool is placed on the inner side of the drawer bucket 132.

Referring to fig. 1 to 6, a roller frame 2 is disposed on an outer surface of a lower end of a base 1, a roller shaft 3 is disposed on an inner surface of the roller frame 2, a roller 4 is disposed on an outer surface of the roller shaft 3, an upper end of the roller frame 2 is fixedly connected to the lower end of the base 1, an outer surface of the roller shaft 3 is movably connected to the inner surface of the roller frame 2, the outer surface of the roller shaft 3 is movably connected to the inner surface of the roller 4, the roller 4 is movably connected to the roller frame 2 through the roller shaft 3, a lower end of a first fixing frame 5 is fixedly connected to the upper end of the base 1, an outer surface of the first rotating shaft 6 is movably connected to the inner surface of the first fixing frame 5, a support rod 7 is movably connected to the first fixing frame 5 through the first rotating shaft 6, and an outer surface of a rear end.

In the invention, when the angle adjusting device is used, the inclination angle of the drawing board 10 needs to be adjusted according to the drawing habit of a user, so that the user can draw on the front end of the drawing board 10 conveniently, when the inclination angle of the drawing board 10 is adjusted, the supporting rod 7 is rotated on the inner side of the first fixing frame 5 by rotating the supporting rod 7 with the first rotating shaft 6 as the axis, thereby achieving the purpose of adjusting the angle of the supporting rod 7, then the clamping rod 83 is rotated on the inner side of the second fixing frame 81 with the second rotating shaft 82 as the axis, thereby achieving the purpose of clamping the lower end of the clamping rod 83 at the front end of the limiting block 85 inside the sliding rail 84, the supporting rod 7 can be supported and fixed by the clamping rod 83, the adjusting mode is flexible, the drawing experience of the user can be better by adjusting the angle of the drawing board 10, when a larger drawing board 10 needs to be replaced, the limiting block 113 is pulled upwards, so that the movable, the movable rod 112 moves upwards to drive the upper clamping plate 116 to move upwards, the spring 115 can be compressed by the upward movement of the upper clamping plate 116, the locking knob 114 is screwed to enable the locking knob 114 to fix the movable rod 112 at the inner side of the fixed block 111, so that the purpose of fixing the upper clamping plate 116 is achieved, a larger drawing board 10 is placed at the lower side of the upper clamping plate 116 at the upper end of the lower bracket 9, the locking knob 114 is screwed to enable the movable rod 112 and the fixed block 111 to be loosened, the spring 115 restores to an original state under the action of the elasticity of the spring 115 to push the upper clamping plate 116 and the movable rod 112 to move downwards, the drawing board 10 can be clamped between the upper clamping plate 116 and the lower bracket 9 by the downward movement of the upper clamping plate 116, the drawing boards 10 with different sizes can be replaced according to actual requirements, the drawing board is flexible and wider in application range, finally, when the drawing tools are stored in the conventional storage device, the drawing tool can be stored and simultaneously prevented from being damaged due to rainwater entering the interior of the drawer 132 in rainy days by pulling the handle 134 to drive the drawer 132 to slide out of the storage basket 131, the drawing tool can be protected and stored by placing the drawing tool on the interior of the drawer 132, in addition, the lower end of the clamping rod 83 is taken out of the slide rail 84, the clamping rod 83 rotates by taking the second rotating shaft 82 as a shaft, so that the clamping rod 83 rotates to be folded with the supporting rod 7, the supporting rod 7 rotates by taking the first rotating shaft 6 as a shaft, so that the aim of folding the device is fulfilled, the drawing board 10 is conveniently taken down on the interior of the clamping mechanism 11, the drawing board 10 is taken down to be placed between the first fixing frame 5 and the second fixing frame 81, thereby reach and accomodate fixture 11 between bracing piece 7 and base 1, can make things convenient for folding of whole device to accomodate, whole device carries when convenient outdoor drawing.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides an art student uses portable outdoor drawing device which characterized in that: including base (1), the upper end that the upper end of base (1) set up is close to the front side and is provided with first mount (5), the inside of first mount (5) is run through and is provided with first axis of rotation (6), the outside surface of first axis of rotation (6) is provided with bracing piece (7), be provided with adjustment mechanism (8) between base (1) and bracing piece (7), adjustment mechanism (8) are including second mount (81), second axis of rotation (82), kelly (83), slide rail (84), stopper (85), the front end of bracing piece (7) is provided with bottom bracket (9), the upper end of front end bottom bracket (9) of bracing piece (7) is provided with drawing board (10), the upper end of front end drawing board (10) of bracing piece (7) is provided with fixture (11), fixture (11) are including fixed block (111), The adjustable support is characterized in that the adjustable support comprises movable rods (112), limiting blocks (113), locking knobs (114), springs (115) and an upper clamping plate (116), the number of the support rods (7) is two, two groups of connecting rods (12) are arranged between the support rods (7), two groups of storage mechanisms (13) are arranged on the upper sides, close to the connecting rods (12), of the clamping mechanisms (11), and each storage mechanism (13) comprises a storage basket (131), a drawer hopper (132), a partition plate (133) and a handle (134).

2. The portable outdoor drawing device for artistic students according to claim 1, wherein said portable outdoor drawing device comprises: the utility model discloses a bearing support, including base (1), bracing piece (7), the rear end surface of bracing piece (7) is provided with second mount (81), the inside of second mount (81) is run through and is provided with second axis of rotation (82), the outside surface of second axis of rotation (82) is provided with kelly (83), the inside sky of upper end of base (1) is provided with slide rail (84), the inboard of slide rail (84) is provided with stopper (85).

3. The portable outdoor drawing device for artistic students according to claim 1, wherein said portable outdoor drawing device comprises: the front end fixed connection of second mount (81) is at the rear end surface of bracing piece (7), the inside swing joint of second axis of rotation (82) and second mount (81), the inside swing joint in upper end of second axis of rotation (82) and kelly (83), slide rail (84) are seted up and are close to the rear side of first mount (5) in the upper end of base (1) inside, the inside fixed connection of stopper (85) and slide rail (84), the quantity of stopper (85) is five groups, five groups stopper (85) be the linear row of arranging.

4. The portable outdoor drawing device for artistic students according to claim 1, wherein said portable outdoor drawing device comprises: the top that the front end surface of bracing piece (7) is close to drawing board (10) is provided with fixed block (111), the inside of fixed block (111) is run through and is provided with movable rod (112), the upper end surface of movable rod (112) is provided with limiting block (113), the inside lock knob (114) that is provided with that runs through of front end of fixed block (111), the downside that the outside surface of movable rod (112) is close to fixed block (111) is provided with spring (115), the lower extreme surface of movable rod (112) is provided with cardboard (116).

5. The portable outdoor drawing device for artistic students according to claim 1, wherein said portable outdoor drawing device comprises: the rear end surface of fixed block (111) and the front end external surface fixed connection of bracing piece (7), the surface of movable rod (112) and the inside surface swing joint of fixed block (111), the lower extreme surface of restriction piece (113) and the upper end external surface fixed connection of movable rod (112), the inboard surface of locking knob (114) cup joints the outside surface at movable rod (112), the surface of spring (115) and the front end internal thread of fixed block (111) are connected, the rear end of spring (115) extends to the front end of movable rod (112), the upper end surface of going up cardboard (116) and the lower extreme external surface fixed connection of movable rod (112).

6. The portable outdoor drawing device for artistic students according to claim 1, wherein said portable outdoor drawing device comprises: two sets of bracing piece (7) between be provided with and accomodate basket (131), the inboard surface of accomodating basket (131) is provided with drawer bucket (132), the inside of drawer bucket (132) is provided with subregion board (133), the front end surface of drawer bucket (132) is provided with handle (134).

7. The portable outdoor drawing device for artistic students according to claim 1, wherein said portable outdoor drawing device comprises: accomodate basket (131) fixed mounting two sets of bracing piece (7) between, the surface of drawer fill (132) and the inboard surface swing joint who accomodates basket (131), partition board (133) fixed connection is at the inboard surface of drawer fill (132), the rear end surface of handle (134) and the front end surface fixed connection of drawer fill (132).

8. The portable outdoor drawing device for artistic students according to claim 1, wherein said portable outdoor drawing device comprises: the outer surface of the lower end of the base (1) is provided with a roller frame (2), the inner surface of the roller frame (2) is provided with a roller shaft (3), the outer surface of the roller shaft (3) is provided with rollers (4), the upper end of the roller frame (2) is fixedly connected with the lower end of the base (1), the outer surface of the roller shaft (3) is movably connected with the inner surface of the roller frame (2), the outer surface of the roller shaft (3) is movably connected with the inner side surface of the rollers (4), the rollers (4) are movably connected with the roller frame (2) through the roller shaft (3), the lower end of the first fixing frame (5) is fixedly connected with the upper end of the base (1), the outer surface of the first rotating shaft (6) is movably connected with the inner surface of the first fixing frame (5), and the supporting rod (7) is movably connected with the first fixing frame (5) through the first rotating shaft (6), the outer surface of the rear end of the lower bracket (9) is fixedly connected with the outer surface of the front end of the supporting rod (7).