CN112882320A

CN112882320A - Light supplementing lighting device for drama movie and television shooting

Info

Publication number: CN112882320A
Application number: CN202110115875.6A
Authority: CN
Inventors: 王慧; 徐鹏; 周蕾; 李海涛; 扈晓婕
Original assignee: Jiaozuo university
Current assignee: Jiaozuo university
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-06-01

Abstract

The invention provides a supplementary lighting device for drama movie and television shooting, which relates to the technical field of supplementary lighting and solves the problems that when a supplementary lighting lamp needs to adjust the height, a worker needs to bend down to adjust the supplementary lighting lamp, and the supplementary lighting lamp is not easy to adjust to a proper position; the light filling lamp generally adopts the tripod to be used for supporting fixedly, at the easy unstable problem of outdoor tripod. A light supplement lighting device for drama movie and television shooting comprises a light supplement lamp; the light filling lamp is installed on first bearing structure, and first bearing structure installs on the base to still install second bearing structure on the light filling lamp. Because the rack is meshed with the cylindrical gear, the gear A is meshed with the gear B, and the worm B is meshed with the worm wheel B; the screw rod is connected in the cylindrical rod in a rotating mode, the worm wheel B is welded at the tail end of the screw rod, and the head end of the cylindrical rod is connected with the light supplementing lamp, so that the height of the floodlight can be accurately adjusted according to field use when the pedal is used, and self-locking fixing is carried out through the worm B and the worm wheel B.

Description

Light supplementing lighting device for drama movie and television shooting

Technical Field

The invention belongs to the technical field of supplementary lighting, and particularly relates to a supplementary lighting device for drama movie and television shooting.

Background

Drama, which is a general term of stage performance art that achieves narrative purposes in the forms of language, action, dance, music, puppet, etc., the drama concept in literature refers to scripts created for drama performance, i.e., script, the performances of drama are various and commonly include drama, opera, dance, music, puppet drama, etc., drama is a comprehensive art that plays stories on stage by actor playing roles, people record through movie shooting for better appreciation, however, light requirements in stage performance art are constantly high, and therefore people supplement light to scenes through lighting devices, and thus, the works are better displayed.

One is that the conventional light supplement lamp needs to be adjusted to a proper height during shooting, and a common worker needs to bend down to adjust the light supplement lamp, so that the light supplement lamp is not easy to adjust to a proper position during bending down to adjust, needs to be repeatedly adjusted for many times, and is very tedious; furthermore, current light filling lamp all adopts the tripod to be used for supporting fixedly, but current tripod all is applicable to indoorly generally, and outdoor especially has earth or time unevenness when subaerial, the tripod is unstable easily, can lead to the light filling can't reach the best effect, influences and shoots.

Accordingly, in view of the above, research and improvement are made on the conventional structure and defects, and a supplementary lighting device for drama movie shooting is provided, so as to achieve the purpose of higher practical value.

Disclosure of Invention

In order to solve the technical problems, the invention provides a light supplement lighting device for drama movie and television shooting, which aims to solve the problems that the conventional light supplement lamp needs to be adjusted to a proper height during shooting, general workers need to bend down to adjust the conventional light supplement lamp, cannot easily adjust the conventional light supplement lamp to a proper position during bending down to adjust the conventional light supplement lamp, and need to repeatedly adjust the conventional light supplement lamp for many times, so that the conventional light supplement lighting device is very complicated; furthermore, current light filling lamp all adopts the tripod to be used for supporting fixedly, but current tripod all is applicable to indoorly generally, and outdoor especially has earth or time unevenness when subaerial, the tripod is unstable easily, can lead to the light filling can't reach the best effect, influences the problem of shooting.

The invention relates to a light supplementing and illuminating device for drama movie and television shooting, which is achieved by the following specific technical means:

a light supplement lighting device for drama movie and television shooting comprises a light supplement lamp; the light supplement lamp is arranged on the first support structure, the first support structure is arranged on the base, and the second support structure is arranged on the light supplement lamp; the base further comprises a cylindrical gear, a fixed seat, a pedal, a rack and an elastic piece, and the cylindrical gear is welded at the head end of the rotating shaft; the fixed seat is welded in the base; the pedal is connected with the rack, the pedal and the rack are connected in the fixed seat in a sliding manner, and the rack is meshed with the cylindrical gear; the elastic pieces are two in number, one ends of the two elastic pieces are symmetrically welded on the rack, and the other ends of the two elastic pieces are connected to the fixed seat in a sliding mode.

Furthermore, the light supplement lamp comprises four light diffusion plates, a connecting seat A and a connecting seat B, wherein the four light diffusion plates are arranged on the light supplement lamp in an annular array; the connecting seat A is installed on the back of the light supplementing lamp, and the connecting seat A is rotatably connected with the connecting seat B through a connecting shaft.

Furthermore, the light supplementing lamp further comprises a rectangular plate, a rotating shaft, a worm wheel A, a worm A and a rotating handle, the rectangular plate is connected with the connecting seat B in a welding mode, and the bottom of the rectangular plate is connected with the rotating shaft; the worm wheel A is welded on the connecting seat B; the worm A is fixed on the rectangular plate, a rotating handle is welded at one end of the worm A, and the worm A is meshed with the worm wheel A.

Furthermore, the first support structure comprises a cylindrical rod, a limiting rod, a screw rod and a worm gear B, the head end of the cylindrical rod is connected with the rotating shaft, and two limiting rods are symmetrically arranged on the outer wall of the cylindrical rod; the screw rod is rotatably connected in the cylindrical rod, the tail end of the screw rod is welded with a worm wheel B, and the bottom of the screw rod is rotatably connected in the base.

Further, the base comprises a fixed block A, a worm B, a gear A, a rotating shaft, a fixed block B and a gear B, the fixed block A is welded on the top end face of the inner wall of the base, the fixed block A is connected with the worm B, and the worm B is meshed with the worm gear B; the gear A is welded at the head end of the worm B; the rotating shaft is connected in the base through a fixing block B, a gear B is welded at the tail end of the rotating shaft, and the gear A is meshed with the gear B; the cylindrical gear is welded at the head end of the rotating shaft.

Furthermore, the second support structure comprises a connecting seat C, connecting blocks, a telescopic rod and a buckle, wherein the connecting seat C is sleeved on the cylindrical rod, and the connecting seat C is rotatably connected with three connecting blocks; the telescopic link is equipped with three altogether, and three telescopic links weld respectively on three connecting block to all be connected with the buckle on the three telescopic links.

Furthermore, the second supporting structure further comprises a connecting seat D, a rubber pad, an adjusting sleeve and a conical rod, wherein the connecting seat D is sleeved on the cylindrical rod and is positioned right below the connecting seat C, and three connecting rods on the connecting seat D are respectively in rotating connection with the three buckles; the number of the rubber pads is three, and the three rubber pads are respectively sleeved at the bottoms of the three telescopic rods; the number of the adjusting sleeves is three, and the three adjusting sleeves are respectively and rotatably connected to the tail ends of the three telescopic rods; the number of the conical rods is three, threads are arranged on the three conical rods, and the three conical rods are respectively connected in the three telescopic rods in a sliding manner; the threads arranged on the three conical rods are respectively meshed with the three adjusting sleeves.

Compared with the prior art, the invention has the following beneficial effects:

first bearing structure has been improved, can trample the footboard through the improvement and carry out quick accurate regulation to the light filling lamp height, and has improved second bearing structure, can carry out supplementary support to the light filling lamp through the improvement to indoor and inside and outside adjustable telescopic link change different fixed modes, make the more stable of light filling lamp, specifically as follows: firstly, a base is placed on the ground, when the base is indoors, three telescopic rods can be unfolded and adjusted to be at a proper height, a tripod structure is in contact with the ground, the light supplement lamp can be supported and fixed in an auxiliary mode through the tripod structure, and rubber pads are sleeved at the bottoms of the three telescopic rods respectively, so that the friction force between the tripod structure and the ground can be increased, and slipping is prevented; when outdoor shooting, at first take off the rubber pad of three telescopic link tail ends, then can rotate the adjusting collar of three telescopic link tail ends respectively, because of the screw thread meshing that sets up on adjusting collar and the toper pole, and toper pole sliding connection is in the telescopic link, unscrews the toper pole, because of the head end of toper pole is sharp form, inserts ground through the toper pole, is fit for using when outdoor shooting more.

After the fixation is finished, the gear A is meshed with the gear B because the rack is meshed with the cylindrical gear, and the worm B is meshed with the worm wheel B; the screw rod is connected in the cylindrical rod in a rotating mode, the worm wheel B is welded at the tail end of the screw rod, the head end of the cylindrical rod is connected with the light supplementing lamp, the height of the floodlight can be accurately adjusted according to field use when a pedal is trampled, and self-locking fixing is carried out through the worm B and the worm wheel B.

Last because of four diffusion sheet install on the light filling lamp through four diffusion sheet messenger shine on the diffusion sheet glazing become softer, and the angle of adjustable diffusion sheet carries out the light filling to the scene, thereby better show works, it links to each other to rotate through the connecting axle because of connecting seat A and connecting seat B, and connecting seat A is connected with the light filling lamp, can carry out the regulation of angle from top to bottom to the light filling lamp, because of worm wheel A welds on connecting seat B, worm A meshes with worm wheel A mutually, can carry out the regulation of angle about the light filling lamp when rotating worm A.

Drawings

Fig. 1 is a schematic axial view of the present invention.

Fig. 2 is a schematic view of an axial view structure of the back surface of the fill light of the present invention.

Fig. 3 is a schematic view of a first support structure of the present invention.

Fig. 4 is an axial view of the present invention with the second support structure removed.

Fig. 5 is an enlarged schematic view of fig. 4 at a.

Fig. 6 is a schematic view of the pedal structure of the present invention.

Fig. 7 is a schematic view of a second support structure of the present invention.

Fig. 8 is a schematic sectional view of the telescopic rod of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a light supplement lamp; 101. a light-diffusing sheet; 102. a connecting seat A; 103. a connecting seat B; 104. a rectangular plate; 105. a rotating shaft; 106. a worm gear A; 107. a worm A; 108. a handle is rotated; 2. a first support structure; 201. a cylindrical rod; 202. a limiting rod; 203. a screw; 204. a worm gear B; 3. a base; 301. a fixed block A; 302. a worm B; 303. a gear A; 304. a rotating shaft; 305. a fixed block B; 306. a gear B; 307. a cylindrical gear; 308. a fixed seat; 309. a pedal; 310. a rack; 311. an elastic member; 4. a second support structure; 401. a connecting seat C; 402. connecting blocks; 403. a telescopic rod; 404. buckling; 405. a connecting seat D; 406. a rubber pad; 407. an adjusting sleeve; 408. a tapered rod.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 8:

the invention provides a supplementary lighting device for drama movie and television shooting, which comprises a supplementary lighting lamp 1; the light supplement lamp 1 is arranged on the first support structure 2, the first support structure 2 is arranged on the base 3, and the light supplement lamp 1 is also provided with a second support structure 4; the base 3 further comprises a cylindrical gear 307, a fixed seat 308, a pedal 309, a rack 310 and an elastic piece 311, wherein the cylindrical gear 307 is welded at the head end of the rotating shaft 304; the fixed seat 308 is welded in the base 3; the pedal 309 is connected with a rack 310, the pedal 309 and the rack 310 are slidably connected in the fixed seat 308, and the rack 310 is meshed with the cylindrical gear 307; the number of the elastic pieces 311 is two, one ends of the two elastic pieces 311 are symmetrically welded on the rack 310, and the other ends of the two elastic pieces 311 are connected to the fixed seat 308 in a sliding manner, so that the rack 310 is meshed with the cylindrical gear 307, the gear A303 is meshed with the gear B306, and the worm B302 is meshed with the worm wheel B204; the screw rod 203 is rotatably connected in the cylindrical rod 201, the worm wheel B204 is welded at the tail end of the screw rod 203, and the head end of the cylindrical rod 201 is connected with the light supplement lamp 1, so that the height of the light supplement lamp 1 can be accurately adjusted according to field use when the pedal 309 is stepped on, and self-locking fixation is performed through the worm B302 and the worm wheel B204.

Referring to fig. 2, the light supplement lamp 1 includes four light diffusion plates 101, a connection seat a102, and a connection seat B103, where the four light diffusion plates 101 are installed on the light supplement lamp 1 in an annular array; connecting seat A102 is installed at the back of light filling lamp 1, and connecting seat A102 rotates through the connecting axle with connecting seat B103 and links to each other, makes to shine at the board 101 glazing of scattering through four board 101 and become softer, and the angle of adjustable board 101 that scatters carries out the light filling to the scene to better show works, rotate through the connecting axle because of connecting seat A102 and connecting seat B103 and link to each other, and connecting seat A102 is connected with light filling lamp 1, can carry out the regulation of angle from top to bottom to light filling lamp 1.

Referring to fig. 2, the fill-in light 1 further includes a rectangular plate 104, a rotating shaft 105, a worm wheel a106, a worm a107 and a rotating handle 108, the rectangular plate 104 is connected to the connecting seat B103 by welding, and the bottom of the rectangular plate 104 is connected to the rotating shaft 105; the worm wheel A106 is welded on the connecting seat B103; the worm A107 is fixed on the rectangular plate 104, the rotating handle 108 is welded at one end of the worm A107, the worm A107 is meshed with the worm wheel A106, the worm wheel A106 is welded on the connecting seat B103, the worm A107 is meshed with the worm wheel A106, and when the worm A107 is rotated, the light supplement lamp 1 can be adjusted in left and right angles.

Referring to fig. 3, the first support structure 2 includes a cylindrical rod 201, a limiting rod 202, a screw 203 and a worm wheel B204, the head end of the cylindrical rod 201 is connected with the rotating shaft 105, and two limiting rods 202 are symmetrically arranged on the outer wall of the cylindrical rod 201; the screw 203 is rotatably connected in the cylindrical rod 201, a worm wheel B204 is welded at the tail end of the screw 203, and the bottom of the screw 203 is rotatably connected in the base 3.

Referring to fig. 5, the base 3 includes a fixed block a301, a worm B302, a gear a303, a rotating shaft 304, a fixed block B305 and a gear B306, the fixed block a301 is welded on the top end face of the inner wall of the base 3, the worm B302 is connected to the fixed block a301, and the worm B302 is meshed with the worm wheel B204; the gear A303 is welded at the head end of the worm B302; the rotating shaft 304 is connected in the base 3 through a fixing block B305, a gear B306 is welded at the tail end of the rotating shaft 304, and the gear A303 is meshed with the gear B306; the cylindrical gear 307 is welded to the head end of the rotating shaft 304.

Referring to fig. 7, the second supporting structure 4 includes a connecting seat C401, a connecting block 402, an expansion link 403, and a buckle 404, the connecting seat C401 is sleeved on the cylindrical rod 201, and three connecting blocks 402 are rotatably connected to the connecting seat C401; the number of the telescopic rods 403 is three, the three telescopic rods 403 are respectively welded on the three connecting blocks 402, and the three telescopic rods 403 are all connected with the buckles 404.

Referring to fig. 7 and 8, the second supporting structure 4 further includes a connecting seat D405, a rubber pad 406, an adjusting sleeve 407 and a tapered rod 408, the connecting seat D405 is sleeved on the cylindrical rod 201, the connecting seat D405 is located right below the connecting seat C401, and three connecting rods on the connecting seat D405 are respectively rotatably connected with the three buckles 404; three rubber pads 406 are arranged, and the three rubber pads 406 are respectively sleeved at the bottoms of the three telescopic rods 403; the number of the adjusting sleeves 407 is three, and the three adjusting sleeves 407 are respectively and rotatably connected to the tail ends of the three telescopic rods 403; the number of the conical rods 408 is three, threads are arranged on the three conical rods 408, and the three conical rods 408 are respectively connected in the three telescopic rods 403 in a sliding manner; the threads arranged on the three conical rods 408 are respectively meshed with the three adjusting sleeves 407, when the light supplementing lamp is indoors, the three telescopic rods 403 can be unfolded to form a tripod structure to be in contact with the ground, the light supplementing lamp 1 can be supported and fixed in an auxiliary mode through the tripod structure, and rubber pads 406 are respectively sleeved at the bottoms of the three telescopic rods 403, so that the friction force between the tripod structure and the ground can be increased, and slipping is prevented; when shooting outdoors, firstly the rubber pads 406 at the tail ends of the three telescopic rods 403 are taken down, then the adjusting sleeves 407 at the tail ends of the three telescopic rods 403 can be respectively rotated, because the adjusting sleeves 407 are engaged with the threads arranged on the tapered rod 408, and the tapered rod 408 is slidably connected in the telescopic rods 403, the tapered rod 408 is screwed out, because the head end of the tapered rod 408 is pointed, and is inserted into the ground through the tapered rod 408, which is more suitable for being used when shooting outdoors.

The specific use mode and function of the embodiment are as follows:

when the light supplement lamp is used, when light supplement is carried out during shooting, firstly, the base 3 is placed on the ground, when the light supplement lamp is indoors, the three telescopic rods 403 can be unfolded and adjusted to be at a proper height, a tripod structure is in contact with the ground, the light supplement lamp 1 can be supported and fixed in an auxiliary mode through the tripod structure, and rubber pads 406 are sleeved at the bottoms of the three telescopic rods 403 respectively, so that the friction force between the tripod structure and the ground can be increased, and slipping is prevented; when shooting outdoors, firstly the rubber pads 406 at the tail ends of the three telescopic rods 403 are taken down, then the adjusting sleeves 407 at the tail ends of the three telescopic rods 403 can be respectively rotated, because the adjusting sleeves 407 are engaged with the threads arranged on the tapered rod 408, and the tapered rod 408 is slidably connected in the telescopic rods 403, the tapered rod 408 is screwed out, because the head end of the tapered rod 408 is pointed, and is inserted into the ground through the tapered rod 408, which is more suitable for being used when shooting outdoors.

Secondly, after the fixation is finished, the rack 310 is meshed with the cylindrical gear 307, the gear A303 is meshed with the gear B306, and the worm B302 is meshed with the worm wheel B204; the screw rod 203 is rotatably connected in the cylindrical rod 201, the worm wheel B204 is welded at the tail end of the screw rod 203, and the head end of the cylindrical rod 201 is connected with the light supplement lamp 1, so that the height of the floodlight 1 can be accurately adjusted according to field use when the pedal 309 is stepped, and self-locking fixation is performed through the worm B302 and the worm wheel B204.

Third, install on the light filling lamp because of four diffusion sheet 101 at last and make shining at diffusion sheet 101 glazing become softer through four diffusion sheet 101, and the angle of adjustable diffusion sheet 101 carries out the light filling to the scene, thereby better show works, it is continuous to rotate through the connecting axle because of connecting seat A102 and connecting seat B103, and connecting seat A102 is connected with light filling lamp 1, can carry out the regulation of angle from top to bottom to light filling lamp 1, because of worm wheel A106 welds on connecting seat B103, worm A107 meshes with worm wheel A106 mutually, can carry out the regulation of angle about to light filling lamp 1 when rotating worm A107.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a light filling lighting device that drama movie & TV shot usefulness which characterized in that: comprises a light supplement lamp (1); the light supplement lamp (1) is arranged on the first supporting structure (2), the first supporting structure (2) is arranged on the base (3), and the light supplement lamp (1) is also provided with a second supporting structure (4); the base (3) further comprises a cylindrical gear (307), a fixed seat (308), a pedal (309), a rack (310) and an elastic piece (311), wherein the cylindrical gear (307) is welded at the head end of the rotating shaft (304); the fixed seat (308) is welded in the base (3); the pedal (309) is connected with the rack (310), the pedal (309) and the rack (310) are connected in the fixed seat (308) in a sliding manner, and the rack (310) is meshed with the cylindrical gear (307); the number of the elastic pieces (311) is two, one ends of the two elastic pieces (311) are symmetrically welded on the rack (310), and the other ends of the two elastic pieces (311) are connected to the fixed seat (308) in a sliding mode.

2. A supplementary lighting device for drama movie and tv shooting according to claim 1, wherein: the light supplement lamp (1) comprises four light diffusion plates (101), a connecting seat A (102) and a connecting seat B (103), wherein the four light diffusion plates (101) are arranged, and the four light diffusion plates (101) are arranged on the light supplement lamp (1) in an annular array shape; the connecting seat A (102) is installed on the back face of the light supplement lamp (1), and the connecting seat A (102) is connected with the connecting seat B (103) in a rotating mode through a connecting shaft.

3. A supplementary lighting device for drama movie and tv shooting according to claim 1, wherein: the light supplement lamp (1) further comprises a rectangular plate (104), a rotating shaft (105), a worm wheel A (106), a worm A (107) and a rotating handle (108), the rectangular plate (104) is connected with the connecting seat B (103) in a welding mode, and the bottom of the rectangular plate (104) is connected with the rotating shaft (105); the worm wheel A (106) is welded on the connecting seat B (103); the worm A (107) is fixed on the rectangular plate (104), a rotating handle (108) is welded at one end of the worm A (107), and the worm A (107) is meshed with the worm wheel A (106).

4. A supplementary lighting device for drama movie and tv shooting according to claim 1, wherein: the first supporting structure (2) comprises a cylindrical rod (201), a limiting rod (202), a screw rod (203) and a worm gear B (204), the head end of the cylindrical rod (201) is connected with the rotating shaft (105), and two limiting rods (202) are symmetrically arranged on the outer wall of the cylindrical rod (201); the screw rod (203) is rotatably connected in the cylindrical rod (201), a worm wheel B (204) is welded at the tail end of the screw rod (203), and the bottom of the screw rod (203) is rotatably connected in the base (3).

5. A supplementary lighting device for drama movie and tv shooting according to claim 1, wherein: the base (3) comprises a fixed block A (301), a worm B (302), a gear A (303), a rotating shaft (304), a fixed block B (305) and a gear B (306), the fixed block A (301) is welded on the top end face of the inner wall of the base (3), the worm B (302) is connected to the fixed block A (301), and the worm B (302) is meshed with the worm wheel B (204); the gear A (303) is welded at the head end of the worm B (302); the rotating shaft (304) is connected in the base (3) through a fixing block B (305), a gear B (306) is welded at the tail end of the rotating shaft (304), and the gear A (303) is meshed with the gear B (306); the cylindrical gear (307) is welded at the head end of the rotating shaft (304).

6. A supplementary lighting device for drama movie and tv shooting according to claim 1, wherein: the second supporting structure (4) comprises a connecting seat C (401), connecting blocks (402), an expansion rod (403) and a buckle (404), the connecting seat C (401) is sleeved on the cylindrical rod (201), and the connecting seat C (401) is rotatably connected with the three connecting blocks (402); the number of the telescopic rods (403) is three, the three telescopic rods (403) are respectively welded on the three connecting blocks (402), and the three telescopic rods (403) are all connected with buckles (404).

7. A supplementary lighting device for drama movie and tv shooting according to claim 1, wherein: the second supporting structure (4) further comprises a connecting seat D (405), a rubber pad (406), an adjusting sleeve (407) and a conical rod (408), the connecting seat D (405) is sleeved on the cylindrical rod (201), the connecting seat D (405) is located right below the connecting seat C (401), and three connecting rods on the connecting seat D (405) are respectively in rotating connection with the three buckles (404); the number of the rubber pads (406) is three, and the three rubber pads (406) are respectively sleeved at the bottoms of the three telescopic rods (403); the number of the adjusting sleeves (407) is three, and the three adjusting sleeves (407) are respectively and rotatably connected to the tail ends of the three telescopic rods (403); the number of the conical rods (408) is three, threads are arranged on the three conical rods (408), and the three conical rods (408) are respectively connected into the three telescopic rods (403) in a sliding manner; threads arranged on the three conical rods (408) are respectively meshed with the three adjusting sleeves (407).