CN111304055B

CN111304055B - Biochemical incubator

Info

Publication number: CN111304055B
Application number: CN202010142009.1A
Authority: CN
Inventors: 陶埼波; 董栩烽; 肖健; 张一帆; 王泽飞
Original assignee: Zhejiang Zhicheng Medical Equipment Co Ltd
Current assignee: Zhejiang Zhicheng Medical Equipment Co Ltd
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2021-04-27
Anticipated expiration: 2040-03-04
Also published as: CN111304055A

Abstract

The invention discloses a biochemical incubator, which comprises a box body, a plurality of slide rails arranged on the inner wall in the box body, a plurality of partition plates horizontally arranged on the slide rails, an adjusting device for adjusting the heights of the partition plates, and a plurality of fixing devices for connecting the partition plates and the adjusting device; the height of one of the partition plates can be independently adjusted according to the height of the culture container, and the partition plates are directly arranged in the box body for height adjustment, so that the operation is convenient and fast.

Description

Biochemical incubator

Technical Field

The invention relates to the field of incubators, in particular to a biochemical incubator.

Background

The biochemical incubator is used for environmental protection, epidemic prevention, drug inspection, research of farm animals, aquatic products and the like, colleges and production departments, and is special constant temperature equipment for water body analysis, culture and preservation of bacteria, mold and microorganism, plant cultivation and breeding experiments. The biochemical incubator comprises a box body and a temperature and humidity control system, and keeps constant temperature and humidity in the box body to culture microorganisms.

Be provided with a plurality of sieve form baffles in current biochemical incubator in order to be used for storing culture dish or various reagent containers, the baffle erects on the installation position of inner wall, and the baffle can open the level and pull out, and generally this kind of installation position can be a plurality ofly distributed perpendicularly to put the baffle in the installation position of difference when needs height-adjusting. When the height of the partition plate is adjusted, the partition plate needs to be pulled out of the box body and then inserted into other installation parts, and the operation is convenient and fast

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a biochemical incubator, wherein the height of one partition plate can be independently adjusted according to the height of a culture container, the partition plate is directly arranged in the incubator body for height adjustment, and the operation convenience is better.

In order to achieve the purpose, the invention adopts the following technical scheme: the biochemical incubator comprises a box body, a plurality of slide rails arranged on the inner wall of the box body, a plurality of partition plates horizontally arranged on the slide rails, an adjusting device used for adjusting the height of the partition plates, and a plurality of fixing devices used for connecting the partition plates and the adjusting device, wherein the adjusting device comprises a main shaft, a plurality of spiral gears sleeved on the main shaft at equal intervals, a first helical gear and a second helical gear which are rotatably arranged on the box body and meshed with the spiral gears, a first supporting frame fixedly arranged on the first helical gear, a second supporting frame symmetrically and fixedly arranged on the second helical gear with the first supporting frame, a first base rotatably sleeved on the first supporting frame, a second base rotatably sleeved on the second supporting frame, two groups of locking assemblies respectively used for fixing the first supporting frame and the second supporting frame, a first fixing seat sleeved on the spiral gears and fixedly arranged on the inner wall of the box body, and tooth grooves annularly distributed at the bottoms of the spiral, The device comprises a main shaft, a plurality of first gears, a plurality of first electronic telescopic rods, a convex block, a sleeve and a motor, wherein the first gears are arranged on the main shaft; the first gear is meshed with a tooth socket at the lower end of the spiral gear by driving a first electronic telescopic rod below a partition plate which needs to move up and down, the projection is driven to rotate by driving a sleeve to rotate forwards and backwards by a motor, the projection is fixedly arranged on the main shaft so as to enable the main shaft to rotate integrally, the spiral gear meshed with the first gear is driven to rotate in the rotation process of the main shaft, the first helical gear and the second helical gear are relatively rotated in the rotation process of the spiral gear, the first supporting frame and the second supporting frame are respectively fixedly arranged on the first helical gear and the second helical gear so as to enable the first supporting frame and the second supporting frame to relatively rotate by the axle center of the first helical gear and the second helical gear, the first base and the second base are arranged on the first supporting frame and the second supporting frame so as to enable the first base and the second base to relatively move up and down, and the partition plate on the first base and the second base to move up and down, adjust to accomplish the back and fix first support frame and second support frame through two sets of locking Assembly, thereby accomplish the fixed of baffle, keep first base and second base level to move up or move down through the stock, make the baffle can the level locate on first base and the second base, which baffle just starts the first electron telescopic link of baffle below need be adjusted to the in-process, according to the height that cultivates the container height and can appoint to adjust one of them baffle alone, it directly carries out altitude mixture control in the box to have the baffle, the simple operation nature is better.

The locking assembly comprises a second fixed seat, a sliding chute arranged on the second fixed seat, a first rack and a second rack arranged on two sides of the sliding chute, a sliding block movably arranged on the sliding chute, a connecting rod with one end rotatably arranged on the sliding block and the other end rotatably arranged on a first supporting frame, a second gear rotatably arranged on the sliding block and meshed with the first rack, a third gear rotatably arranged on the sliding block and respectively meshed with the second rack and the second gear, a fixed rod with two ends respectively fixedly arranged on the first rack and the second rack, a first sliding seat movably sleeved on the fixed rod, a second electronic telescopic rod for driving the first sliding seat to move, two first fixed plates arranged on two sides of the axle center of the second gear and fixedly arranged on the second gear, two second fixed plates arranged on two sides of the axle center of the third gear and fixedly arranged on the third gear, a first fixed column fixedly arranged on the first sliding seat and positioned on the same axle center of the second gear and between the two first fixed plates, The second fixing column is fixedly arranged on the first sliding seat, has the same axis with the third gear, and is positioned between the two second fixing plates; the first support frame rotates the in-process and drives the connecting rod and rotate, thereby make the slider on the second fixing base move along the spout, thereby make second gear and third gear be located first rack and second rack and rotate, make slider removal in-process more stable through second gear and third gear setting, reduce the wearing and tearing of slider simultaneously, through the first slide of second electron telescopic link drive, make first fixed column and second fixed column on the first slide be located two first fixed plates and two second fixed plates and move, thereby make first fixed column and second fixed column skew second gear and third gear axle center, thereby make second gear and third gear stall, make the slider stop moving, the connecting rod is fixed to first support frame promptly, can play the supporting role to first support frame through the setting of slider and connecting rod simultaneously.

The sliding rail is provided with a cylinder, a plurality of arc-shaped lugs arranged on the cylinder and slots arranged at equal intervals; the partition plate is provided with a plurality of first T-shaped grooves, a second sliding seat and a third sliding seat which can be simultaneously and movably arranged on the first T-shaped grooves, a first T-shaped block arranged on the second sliding seat, a second T-shaped block arranged on the third sliding seat, and a plurality of special-shaped openings which are arranged at two ends of the partition plate and used for being matched with the cylinder and the arc-shaped lugs; a second T-shaped groove is formed in the first base, and a third T-shaped groove is formed in the second base; the cylinder, the arc-shaped lugs and the special-shaped openings on the partition plate enable the partition plate to move along the direction of the cylinder and the arc-shaped lugs, contact area between the partition plate and the sliding rail is increased, the partition plate is more stable in the moving process, and dislocation of the partition plate in the moving process is avoided; in the relative rotation process of first support frame and second support frame, make second slider and third slide remove along the first T type groove on the baffle, thereby can the reciprocating of space bar, setting up through the slot makes the baffle can insert on the slide rail, set up through the third T type groove on the second T type groove on the first base and the second base, and the first T type piece on the second slide and the second T type piece on the third slide, thereby make second slide and third slide be located first T type piece and the second T type piece and move, make the baffle can insert on the slide rail through above-mentioned setting, move on the baffle and make heterotypic opening on the baffle can be located cylinder and a plurality of arc lugs and move, heterotypic opening and slide rail whole cooperation promptly.

The fixing device comprises an L-shaped plate fixedly arranged on a second sliding seat, a first limiting hole and a second limiting hole symmetrically arranged on the L-shaped plate, a first telescopic rod which is rotatably arranged on a first base and corresponds to the first limiting hole, a second telescopic rod which corresponds to the second limiting hole, an internal thread block sleeved on the screw rod, two guide rods fixedly arranged at two ends of the internal thread block, a first plate which is fixedly arranged on the first telescopic rod and sleeved on one of the guide rods, a second plate which is fixedly arranged on the second telescopic rod and sleeved on the other guide rod, a moving rod which penetrates through the internal thread block, a spring with one end fixedly arranged on the moving rod and the other end fixedly arranged on the internal thread block, a first ball body fixedly arranged on the first telescopic rod, and a second ball body fixedly arranged on the second telescopic rod; the second slide seat and the third slide seat are positioned on the partition plate, the second slide seat and the third slide seat on the partition plate are respectively moved to the first base and the second base, so that the partition plate is positioned on the first base and the second base, namely, the installation of the partition plate is completed, the partition plate is convenient to disassemble and install, the internal thread block is moved by rotating the screw rod, so that the first telescopic rod and the second telescopic rod are extended, even if the first sphere on the first telescopic rod and the second sphere on the second telescopic rod move into the first limiting hole and the second limiting hole, the first sphere and the second sphere can play a certain role in guiding the second slide seat and the third slide seat in the process of moving into the first limiting hole and the second limiting hole, namely, the partition plate is calibrated, the special-shaped openings on the partition plate correspond to the slide rails one to one, and the second slide seat and the third slide seat are respectively fixed on the first base and the second base, make first support frame and second support frame rotate in-process second slide and third slide and be located the baffle and can remove, finally realize reciprocating of baffle, the internal thread piece is to L template direction removal in-process, carriage release lever and spring follow move together, make the carriage release lever can withstand the L template, make the spring compressed, thereby make the carriage release lever play reaction force to the internal thread piece, screw rod stall back, the carriage release lever produces the thrust along the screw rod direction to the internal thread piece, thereby make the difficult rotation of screw rod, can be fine fixed to the second slide promptly.

The invention has the following advantages: keep first base and second base level to the rebound or move down through the stock, make the baffle can the level locate first base and second base on, which baffle just starts the first electron telescopic link of baffle below need be adjusted to the in-process, can appoint the height of adjusting one of them baffle alone according to the culture container height, have the baffle and directly carry out altitude mixture control in the box, the simple operation nature is better.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is an enlarged view of fig. 3 at D.

Fig. 5 is a cross-sectional view taken along line D-D of fig. 3.

Fig. 6 is an enlarged view of fig. 5 at B.

Fig. 7 is an enlarged view of fig. 5 at C.

Fig. 8 is a structural sectional view taken along line F-F in fig. 2.

Fig. 9 is an enlarged view of a portion a in fig. 8.

Fig. 10 is a partial sectional view taken along line G-G in fig. 2.

Fig. 11 is a schematic structural view of the fixing device.

Fig. 12 is an enlarged view of fig. 11 at E.

Fig. 13 is a schematic front view of the present invention.

Fig. 14 is a sectional view taken along line E-E of fig. 13.

Detailed Description

In order to make the technical solutions of the present invention better understood, 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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

As shown in FIGS. 1-14, the biochemical incubator comprises a housing 1, a plurality of slide rails 2 disposed on the inner wall of the housing, a plurality of partition boards 3 horizontally disposed on the slide rails, an adjusting device 4 for adjusting the height of the partition boards, and a plurality of fixing devices 5 for connecting the partition boards and the adjusting device, wherein the adjusting device 4 comprises a main shaft 41, a plurality of helical gears 42 equidistantly sleeved on the main shaft, a first helical gear 43 and a second helical gear 44 rotatably disposed on the housing and engaged with the helical gears, a first support bracket 45 fixedly disposed on the first helical gear, a second support bracket 46 symmetrically fixed on the second helical gear with the first support bracket, a first base 47 rotatably sleeved on the first support bracket, a second base 49 rotatably sleeved on the second support bracket, two sets of locking assemblies 48 respectively used for fixing the first support bracket and the second support bracket, a first fixing base 410 sleeved on the helical gear and fixedly disposed on the inner wall of the housing, The gear rack comprises a tooth slot 411, a plurality of first gears 412, a plurality of first electronic telescopic rods 413, a convex block 414, a sleeve 415 and a motor 416, wherein the tooth slot 411 is distributed at the bottom of a spiral gear in an equidistant annular mode, the plurality of first gears 412 are arranged on a main shaft, the plurality of first electronic telescopic rods 413 are used for driving the first gears to move up and down, the convex block 414 is fixedly arranged at the lower end of the main shaft, the; the first gear is meshed with a tooth socket at the lower end of the spiral gear by driving a first electronic telescopic rod below a partition plate which needs to move up and down, the sleeve is driven to rotate forwards and backwards by a motor, the sleeve drives the lug to rotate, so as to drive the main shaft to rotate, the spiral gear meshed with the first gear is driven to rotate in the rotation process of the main shaft, the first helical gear and the second helical gear are driven to rotate relatively in the rotation process of the spiral gear, so as to drive the first support frame and the second support frame to rotate relatively by the axle of the first helical gear and the axle of the second helical gear, so as to drive the first base and the second base to move relatively and up and down, so as to drive the partition plate on the first base and the second base to move up and down, after adjustment is completed, the first support frame and the second support frame are fixed by two groups of locking assemblies, so as to complete the fixation of the partition plate, the first base, in the process, which partition plate needs to be adjusted to start the first electronic telescopic rod below the partition plate. The invention firstly drives a first electronic telescopic rod below a partition plate needing to move up and down to enable a first gear to be meshed with a tooth socket at the lower end of a spiral gear, a motor drives a sleeve to rotate forwards and backwards to enable a lug to rotate, the lug is fixedly arranged on a main shaft to enable the main shaft to rotate integrally, the spiral gear meshed with the first gear is driven to rotate in the rotation process of the main shaft, a first helical gear and a second helical gear are enabled to rotate relatively in the rotation process of the spiral gear, a first supporting frame and a second supporting frame are respectively fixedly arranged on the first helical gear and the second helical gear to enable the first supporting frame and the second supporting frame to rotate relatively by the axle center of the first helical gear and the second helical gear, a first base and a second base are arranged on the first supporting frame and the second supporting frame to enable the first base and the second base to move relatively and up and down, so as to enable the partition plate on the first base and the second base to move up and down, adjust to accomplish the back and fix first support frame and second support frame through two sets of locking Assembly, thereby accomplish the fixed of baffle, keep first base and second base level to move up or move down through the stock, make the baffle can the level locate on first base and the second base, which baffle just starts the first electron telescopic link of baffle below need be adjusted to the in-process, according to the height that cultivates the container height and can appoint to adjust one of them baffle alone, it directly carries out altitude mixture control in the box to have the baffle, the simple operation nature is better.

The locking assembly 48 includes a second fixing seat 481, a sliding groove 482 arranged on the second fixing seat, a first rack 483 and a second rack 484 arranged on two sides of the sliding groove, a sliding block 485 movably arranged on the sliding groove, a connecting rod 486 arranged on the sliding block with one end rotating and the other end rotating and the first supporting frame, a second gear 487 rotatably arranged on the sliding block and engaged with the first rack, a third gear 488 rotatably arranged on the sliding block and engaged with the second rack and the second gear respectively, a fixing rod 489 with two ends respectively fixed on the first rack and the second rack, a first sliding seat 490 movably sleeved on the fixing rod, a second electronic expansion link 491 for driving the first sliding seat to move, two first fixing plates 492 arranged on two sides of the axle center of the second gear and fixed on the second gear, two second fixing plates 492 arranged on two sides of the axle center of the third gear and fixed on the third gear, a first fixing plate 483 and a second fixing plate 492 arranged on two, A first fixing column 493 which is fixedly arranged on the first sliding seat, has the same axis with the second gear and is positioned between the two first fixing plates, and a second fixing column 494 which is fixedly arranged on the first sliding seat, has the same axis with the third gear and is positioned between the two second fixing plates; the first support frame rotates the in-process and drives the connecting rod and rotate, thereby make the slider on the second fixing base move along the spout, thereby make second gear and third gear be located first rack and second rack and rotate, make slider removal in-process more stable through second gear and third gear setting, reduce the wearing and tearing of slider simultaneously, through the first slide of second electron telescopic link drive, make first fixed column and second fixed column on the first slide be located two first fixed plates and two second fixed plates and move, thereby make first fixed column and second fixed column skew second gear and third gear axle center, thereby make second gear and third gear stall, make the slider stop moving, the connecting rod is fixed to first support frame promptly, can play the supporting role to first support frame through the setting of slider and connecting rod simultaneously.

A cylinder 21, a plurality of arc-shaped lugs 22 arranged on the cylinder and slots 23 arranged at equal intervals are arranged on the slide rail 2; the partition plate 3 is provided with a plurality of first T-shaped grooves 31, a second sliding seat 32 and a third sliding seat 33 which can be simultaneously and movably arranged on the plurality of first T-shaped grooves, a first T-shaped block 34 arranged on the second sliding seat, a second T-shaped block 35 arranged on the third sliding seat, and a plurality of special-shaped openings 36 which are arranged at two ends of the partition plate and are used for being matched with the cylinder and the plurality of arc-shaped convex blocks; a second T-shaped groove 471 is arranged on the first base 47, and a third T-shaped groove 495 is arranged on the second base 49; the cylinder, the arc-shaped lugs and the special-shaped openings on the partition plate enable the partition plate to move along the direction of the cylinder and the arc-shaped lugs, contact area between the partition plate and the sliding rail is increased, the partition plate is more stable in the moving process, and dislocation of the partition plate in the moving process is avoided; in the relative rotation process of first support frame and second support frame, make second slider and third slide remove along the first T type groove on the baffle, thereby can the reciprocating of space bar, setting up through the slot makes the baffle can insert on the slide rail, set up through the third T type groove on the second T type groove on the first base and the second base, and the first T type piece on the second slide and the second T type piece on the third slide, thereby make second slide and third slide be located first T type piece and the second T type piece and move, make the baffle can insert on the slide rail through above-mentioned setting, move on the baffle and make heterotypic opening on the baffle can be located cylinder and a plurality of arc lugs and move, heterotypic opening and slide rail whole cooperation promptly.

The fixing device 5 comprises an L-shaped plate 51 fixed on the second sliding seat, a first limit hole 52 and a second limit hole 53 symmetrically arranged on the L-shaped plate, a first telescopic rod 55 which is rotatably arranged on the first base and one end of a screw 54 on the first base is fixed on the first base and corresponds to the first limit hole, a second telescopic rod 56 which corresponds to the second limit hole, an internal thread block 57 sleeved on the screw, two guide rods 58 fixed at two ends of the internal thread block, and a first plate 59 fixed on the first telescopic rod and sleeved on one of the guide rods, a second plate 510 fixedly arranged on the second telescopic rod and sleeved on the other guide rod, a moving rod 511 penetrating the internal thread block, a spring 512 with one end fixedly arranged on the moving rod and the other end fixedly arranged on the internal thread block, a first ball 513 fixedly arranged on the first telescopic rod, and a second ball 514 fixedly arranged on the second telescopic rod; the second slide seat and the third slide seat are positioned on the partition plate, the second slide seat and the third slide seat on the partition plate are respectively moved to the first base and the second base, so that the partition plate is positioned on the first base and the second base, namely, the installation of the partition plate is completed, the partition plate is convenient to disassemble and install, the internal thread block is moved by rotating the screw rod, so that the first telescopic rod and the second telescopic rod are extended, even if the first sphere on the first telescopic rod and the second sphere on the second telescopic rod move into the first limiting hole and the second limiting hole, the first sphere and the second sphere can play a certain role in guiding the second slide seat and the third slide seat in the process of moving into the first limiting hole and the second limiting hole, namely, the partition plate is calibrated, the special-shaped openings on the partition plate correspond to the slide rails one to one, and the second slide seat and the third slide seat are respectively fixed on the first base and the second base, make first support frame and second support frame rotate in-process second slide and third slide and be located the baffle and can remove, finally realize reciprocating of baffle, the internal thread piece is to L template direction removal in-process, carriage release lever and spring follow move together, make the carriage release lever can withstand the L template, make the spring compressed, thereby make the carriage release lever play reaction force to the internal thread piece, screw rod stall back, the carriage release lever produces the thrust along the screw rod direction to the internal thread piece, thereby make the difficult rotation of screw rod, can be fine fixed to the second slide promptly.

The motor is commercially available.

Claims

1. Biochemical incubator, its characterized in that: the device comprises a box body (1), a plurality of sliding rails (2) arranged on the inner wall of the box body, a plurality of partition plates (3) horizontally arranged on the sliding rails, an adjusting device (4) used for adjusting the heights of the partition plates, and a plurality of fixing devices (5) used for connecting the partition plates and the adjusting device, wherein the adjusting device (4) comprises a main shaft (41), a plurality of spiral gears (42) sleeved on the main shaft at equal intervals, a first helical gear (43) and a second helical gear (44) rotatably arranged on the box body and meshed with the spiral gears, a first supporting frame (45) fixedly arranged on the first helical gear, a second supporting frame (46) symmetrically and fixedly arranged on the second helical gear with the first supporting frame, a first base (47) rotatably sleeved on the first supporting frame, a second base (49) rotatably sleeved on the second supporting frame, and two groups of locking assemblies (48) respectively used for fixing the first supporting frame and the, The device comprises a first fixed seat (410) sleeved on a spiral gear and fixedly arranged on the inner wall of a box body, tooth grooves (411) which are distributed at the bottom of the spiral gear in an equidistant annular mode, a plurality of first gears (412) arranged on a main shaft, a plurality of first electronic telescopic rods (413) used for driving the first gears to move up and down, a convex block (414) fixedly arranged at the lower end of the main shaft, a sleeve (415) sleeved on the convex block, a motor (416) used for driving the sleeve to rotate, and a long rod (417) which penetrates through a first base and a second base respectively and is movably arranged on a sliding; the locking assembly (48) comprises a second fixing seat (481), a sliding groove (482) arranged on the second fixing seat, a first rack (483) and a second rack (484) arranged on two sides of the sliding groove, a sliding block (485) movably arranged on the sliding groove, a connecting rod (486) with one end rotatably arranged on the sliding block and the other end rotatably arranged on the first support frame, a second gear (487) rotatably arranged on the sliding block and meshed with the first rack, a third gear (488) rotatably arranged on the sliding block and respectively meshed with the second rack and the second gear, a fixing rod (489) with two ends respectively fixedly arranged on the first rack and the second rack, a first sliding seat (490) movably sleeved on the fixing rod, a second electronic expansion rod (491) used for driving the first sliding seat to move, two first fixing plates (492) arranged on two sides of a shaft center of the second gear and fixedly arranged on the second gear, two second fixing plates (496) arranged on two sides of the shaft center of the third gear and fixedly arranged on the third gear, A first fixing column (493) which is fixedly arranged on the first sliding seat, has the same axis with the second gear and is positioned between the two first fixing plates, and a second fixing column (494) which is fixedly arranged on the first sliding seat, has the same axis with the third gear and is positioned between the two second fixing plates; a cylinder (21), a plurality of arc-shaped lugs (22) arranged on the cylinder and slots (23) arranged at equal intervals are arranged on the sliding rail (2); the partition plate (3) is provided with a plurality of first T-shaped grooves (31), a second sliding seat (32) and a third sliding seat (33) which can be simultaneously and movably arranged on the first T-shaped grooves, a first T-shaped block (34) arranged on the second sliding seat, a second T-shaped block (35) arranged on the third sliding seat, and a plurality of special-shaped openings (36) which are arranged at two ends of the partition plate and used for being matched with the cylinder and the arc-shaped convex blocks; a second T-shaped groove (471) is formed in the first base (47), and a third T-shaped groove (495) is formed in the second base (49); the fixing device (5) comprises an L-shaped plate (51) fixedly arranged on the second sliding seat, a first limit hole (52) and a second limit hole (53) symmetrically arranged on the L-shaped plate, a first telescopic rod (55) which is fixedly arranged on the first base and corresponds to the first limit hole and a second telescopic rod (56) which corresponds to the second limit hole by rotating one end of a screw rod (54) arranged on the first base, an inner thread block (57) sleeved on the screw rod, two guide rods (58) fixedly arranged at two ends of the inner thread block, a first plate (59) fixedly arranged on the first telescopic rod and sleeved on one of the guide rods, a second plate (510) fixedly arranged on the second telescopic rod and sleeved on the other guide rod, a moving rod (511) penetrating and arranged on the inner thread block, a spring (512) with one end fixedly arranged on the moving rod and the other end fixedly arranged on the inner thread block, a first sphere (513) fixedly arranged on the first telescopic rod, And a second sphere (514) fixedly arranged on the second telescopic rod.