CN116175652A

CN116175652A - Novel structure of glove box transition bin

Info

Publication number: CN116175652A
Application number: CN202310381865.6A
Authority: CN
Inventors: 万英南
Original assignee: Hubei Mirana Electromechanical Technology Co ltd
Current assignee: Hubei Mirana Electromechanical Technology Co ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-05-30

Abstract

The invention provides a novel structure of a transition bin of a glove box, which comprises a transition bin body, wherein a fixing mechanism is arranged on the transition bin body; the fixing mechanism is matched with the mounting mechanism in a sliding manner; the fixed mechanism is rotationally provided with a collision mechanism; the abutting mechanism is connected with a limiting mechanism; the limiting mechanism is connected with the mounting mechanism in a matched manner; the mounting mechanism is matched and clamped with a placing mechanism; the placing mechanism is fixed on the mounting mechanism in a clamping and mounting mode, so that an operator can conveniently mount and dismount the placing mechanism; the transition bin body is opened, the abutting mechanism is pressed to rotate, and then the limiting mechanism is reset and slides into the fixing mechanism, so that an operator can conveniently insert the installation mechanism into the fixing mechanism; the abutting mechanism is loosened to reset, and then the limiting mechanism can be clamped in the mounting mechanism when the abutting mechanism extrudes the limiting mechanism, so that an operator can conveniently take the articles in the mounting mechanism and the placing mechanism.

Description

Novel structure of glove box transition bin

Technical Field

The invention belongs to the technical field of structural design of vacuum glove boxes, and particularly relates to a novel structure of a glove box transition bin.

Background

A vacuum glove box is a laboratory apparatus in which a high-purity inert gas is filled into a box body and active substances therein are circularly filtered. Also known as glove boxes, inert gas protection boxes, seal boxes, and the like. Mainly eliminates O2, H2O and organic gas. The method is widely applied to anhydrous, oxygen-free and dust-free ultrapure environments, such as lithium ion batteries, materials, semiconductors, super capacitors, special lamps, laser welding, brazing and the like.

However, when the existing glove box transition bin is used, an operator generally uses a tray to transfer experimental articles, the existing tray is generally arranged in a single layer, the accommodating space for accommodating the articles is limited, and the operator is required to transfer for many times, so that the use efficiency is low; in addition, generally do not set up spacing subassembly to the tray in the transition storehouse, when taking article, the tray slides in the transition storehouse, makes the reagent bottle of placing the liquid in the tray easily empty, and then is unfavorable for improving the result of use of tray.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a novel structure of a glove box transition bin, which is characterized in that a placing mechanism is fixed on an installing mechanism in a clamping installation mode, so that the placing space of articles is conveniently increased, and meanwhile, an operator can conveniently install and detach the placing mechanism.

The technical scheme adopted for solving the technical problems is as follows:

the novel structure of the transition bin of the glove box comprises a transition bin body, wherein the transition bin body comprises a transition bin body, a sealing bin door is rotationally connected to the transition bin body, a rotary rotating handle is matched with the sealing bin door to rotate, a fixing mechanism is arranged in the transition bin body, and a collision mechanism is rotationally connected to the fixing mechanism;

the anti-collision mechanism comprises a rotating plate, the rotating plate is rotationally connected with the fixing mechanism, an anti-slip pad is bonded on the rotating plate, a rotating rod is fixedly connected to the rotating plate, a connecting shaft is fixedly installed on the rotating rod, and a torsion spring is sleeved on the connecting shaft.

As the preference of this embodiment, fixed establishment includes the support frame, rotate between connecting axle and the support frame and be connected, the bull stick passes through torsional spring and support frame cooperation and is connected, be equipped with the empty slot on the support frame, empty slot position cooperation rotation has the revolving plate.

As the preference of this embodiment, fixed establishment still includes the spacing groove, the symmetry is equipped with two spacing grooves on the support frame, spacing groove position cooperation rotation has the ball.

As the preference of this embodiment, be connected with stop gear on the conflict mechanism, stop gear includes the board of keeping out, it has the board of keeping out to contradict on the bull stick, telescopic spring has been cup jointed on the board of keeping out, the board of keeping out passes through telescopic spring and is connected with the support frame cooperation.

As the preference of this embodiment, equidistance fixed mounting has a plurality of fixture block on the board of keeping out, just the tip of fixture block is the cambered surface structure, be equipped with the spout on the support frame.

As a preferable mode of the embodiment, the fixing mechanism is connected with an installation mechanism in a sliding way; the mounting mechanism comprises clamping plates, clamping plates are clamped at the positions of the limiting grooves in a matched mode, the two clamping plates are fixedly connected with the first tray, and rolling connection is achieved between the balls and the clamping plates.

As the preference of this embodiment, the installation mechanism still includes the constant head tank, the equidistance is equipped with a plurality of constant head tank on the cardboard, the rubber pad is installed in the cooperation of constant head tank position, the rubber pad is contradicted with the fixture block.

As the preference of this embodiment, the installation mechanism still includes the slot, be equipped with slot and draw-in groove on the first tray, draw-in groove position cooperation block has the baffle, the baffle is contradicted with first tray.

As the preference of this embodiment, the cooperation block has the mechanism of placing on the installation mechanism, the mechanism of placing includes the inserted bar, slot position cooperation block has the inserted bar, fixed connection between inserted bar and the mount, two fixed connection between mount and the backup pad.

As the preference of this embodiment, the placement machine further includes a fixed slot, two fixed slots are symmetrically arranged on the supporting plate, a second tray is engaged with the fixed slot, and two stop rods are symmetrically and fixedly connected on the second tray.

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

(1) According to the novel structure of the glove box transition bin, two groups of clamping grooves are formed in the first tray, the two baffles are respectively clamped into the two groups of clamping grooves, so that an operator can conveniently pull the first tray and simultaneously protect articles placed in the first tray, the articles can be prevented from sliding out of the first tray during sliding, two slots are symmetrically formed in the first tray, inserting rods arranged on fixing frames are inserted into the slot positions, the supporting plates can be supported, the supporting plates are fixedly connected with the two fixing frames, after the supporting plates are arranged, the second tray is clamped into the fixing groove positions arranged in the supporting plates, the fixing grooves limit the second tray, and the second tray is convenient to install and detach by the operator.

(2) According to the novel structure of the glove box transition bin, when the novel structure is used, the clamping plate is clamped to the limiting groove part arranged in the support frame, when the first tray is pushed, the clamping plate can drive the balls arranged in the support frame to rotate, the contact area between the clamping plate and the support frame can be reduced through the arrangement of the balls, the sliding effect of the first tray is improved, and an operator can conveniently install the first tray in the support frame.

(3) According to the novel structure of the glove box transition bin, the abutting mechanism is loosened to reset the transition bin, so that the limiting mechanism can be clamped into the mounting mechanism when the transition bin extrudes the limiting mechanism, and further, an operator can conveniently take the mounting mechanism and articles in the placing mechanism while limiting the mounting mechanism.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.

FIG. 1 is a schematic diagram of the overall structure of a preferred embodiment of a novel structure of a glove box transition bin according to the present invention;

FIG. 2 is an enlarged schematic view of the portion A shown in FIG. 1;

FIG. 3 is an enlarged schematic view of the B-section structure shown in FIG. 1;

FIG. 4 is a schematic diagram of a connection structure of a second tray and a stopper according to the present invention;

FIG. 5 is an enlarged schematic view of the structure of the portion C shown in FIG. 4;

FIG. 6 is a schematic diagram of a connection structure between a pallet and a first tray according to the present invention;

FIG. 7 is an enlarged schematic view of the structure of the portion D shown in FIG. 6;

fig. 8 is a schematic structural view of a support plate of the present invention;

fig. 9 is an enlarged schematic view of the E-section structure shown in fig. 8.

The figure shows: 1. a transition bin body; 101. a transition bin body; 102. sealing the bin gate; 103. a rotating handle; 2. a fixing mechanism; 201. a support frame; 202. a limit groove; 203. a hollow groove; 204. a ball; 3. a mounting mechanism; 301. a clamping plate; 302. a first tray; 303. a baffle; 304. a rubber pad; 305. a slot; 306. a clamping groove; 307. a positioning groove; 4. a collision mechanism; 401. an anti-slip pad; 402. a rotating plate; 403. a rotating rod; 404. a connecting shaft; 405. a torsion spring; 5. a placement mechanism; 501. a fixing frame; 502. a support plate; 503. a second tray; 504. a stop lever; 505. a rod; 506. a fixing groove; 6. a limiting mechanism; 601. a retaining plate; 602. a telescopic spring; 603. a chute; 604. and (5) clamping blocks.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 9, an embodiment of the present invention provides a novel structure of a transition bin of a glove box, which comprises a transition bin body 1, wherein a fixing mechanism 2 is installed in the transition bin body 1, an installation mechanism 3 is slidably connected to the fixing mechanism 2, an abutting mechanism 4 is rotatably connected to the fixing mechanism 2, and a limiting mechanism 6 is connected to the abutting mechanism 4, wherein the limiting mechanism 6 is cooperatively connected with the installation mechanism 3, and a placement mechanism 5 is cooperatively clamped to the installation mechanism 3. The following technical description will be made on the specific structure and function of the transition bin body 1, the fixing mechanism 2, the mounting mechanism 3, the abutting mechanism 4, the placing mechanism 5 and the limiting mechanism 6 by combining the accompanying drawings.

Referring to fig. 1, a transition bin body 1 includes a transition bin body 101, in this embodiment, the transition bin body 101 is of a cylindrical structure (of course, the transition bin body 101 may also be of a square structure) to fixedly connect a support 201 and the transition bin body 101, a seal bin door 102 is rotatably connected to the transition bin body 101, and a rotary handle 103 is cooperatively rotated on the seal bin door 102, so that the seal bin door 102 is opened or closed by rotating the rotary handle 103 during use. After the transition bin body 1 is opened, the abutting mechanism 4 is pressed to rotate, the limiting mechanism 6 is reset and slides into the fixing mechanism 2, and an operator can conveniently insert the installation mechanism 3 into the fixing mechanism 2.

Referring to fig. 1 to 5, the fixing mechanism 2 includes a supporting frame 201, a connecting shaft 404 rotatably connected to the supporting frame 201, and a rotating rod 403 cooperatively connected to the supporting frame 201 through a torsion spring 405. The support 201 is provided with a hollow groove 203, the part of the hollow groove 203 is matched with a rotating plate 402 for rotation, the support 201 is symmetrically provided with two limit grooves 202, and the part of the limit groove 202 is matched with a ball 204 for rotation. The abutting mechanism 4 comprises a rotating plate 402, the rotating plate 402 is matched with the fixing mechanism 2 to rotate, an anti-slip pad 401 is adhered to the rotating plate 402, a rotating rod 403 is fixedly connected to the rotating plate 402, a connecting shaft 404 is fixedly installed on the rotating rod 403, a torsion spring 405 is sleeved on the connecting shaft 404, the rotating rod 403 is matched and connected with the fixing mechanism 2 through the torsion spring 405, and the rotating rod 403 is matched and connected with the limiting mechanism 6. The limiting mechanism 6 comprises a retaining plate 601, the retaining plate 601 is abutted against the rotating rod 403, a telescopic spring 602 is sleeved on the retaining plate 601, and the retaining plate 601 is connected with the supporting frame 201 in a matched mode through the telescopic spring 602. A plurality of clamping blocks 604 are fixedly installed on the retaining plate 601 at equal intervals, the end parts of the clamping blocks 604 are of cambered surface structures, and a sliding groove 603 is formed in the supporting frame 201.

In this embodiment, two clamping plates 301 are symmetrically and fixedly mounted on the first tray 302, a plurality of positioning slots 307 are equidistantly arranged on the clamping plates 301, when the first tray 302 is placed in the supporting frame 201, an operator can press the rotating plate 402 by hand, the rotating plate 402 is adhered with the anti-slip pad 401, the rotating plate 402 is fixedly connected with the rotating rod 403, a connecting shaft 404 fixed on the rotating rod 403 is rotationally connected with the supporting frame 201, when the rotating plate 402 drives the rotating rod 403 to rotate at the empty slot 203 in the supporting frame 201, the connecting shaft 404 can rotate along the supporting frame 201, a torsion spring 405 is sleeved on the connecting shaft 404, the rotating rod 403 is cooperatively connected with the supporting frame 201 through the torsion spring 405, and the torsion spring 405 deforms when the connecting shaft 404 rotates, and then make the bull stick 403 change from just beginning with the mutual state of contradicting of board 601 into with the state of the separation of board 601 that keeps out, after board 601 loses the conflict power of bull stick 403, reset under the reaction force of extension spring 602, and then drive fixture block 604 and slide the spout 603 position that is equipped with in the support frame 201 again when making board 601 slide along support frame 201, the operating personnel again with cardboard 301 block to the spacing groove 202 position that is equipped with in the support frame 201, when promoting first tray 302, cardboard 301 can drive the ball 204 rotation of installing in the support frame 201, the setting of ball 204 can reduce the area of contact between cardboard 301 and the support frame 201, can improve the slip effect of first tray 302 simultaneously, make things convenient for operating personnel to install first tray 302 in the support frame 201.

Referring to fig. 1 to 9, the mounting mechanism 3 includes a clamping plate 301, the clamping plate 301 is engaged with the position of the limiting groove 202, the two clamping plates 301 are fixedly connected with the first tray 302, and the balls 204 are in rolling connection with the clamping plates 301. A plurality of positioning grooves 307 are equidistantly formed in the clamping plate 301, rubber pads 304 are mounted on the positioning grooves 307 in a matched mode, and the rubber pads 304 are abutted against the clamping blocks 604. Be equipped with slot 305 and draw-in groove 306 on the first tray 302, draw-in groove 306 position cooperation block has baffle 303, and baffle 303 contradicts with first tray 302, loosens conflict mechanism 4 and makes it reset, and then makes stop gear 6 can block in installation mechanism 3 when it extrudees stop gear 6 to the installation mechanism 3, also can make things convenient for the operating personnel to take the article in installation mechanism 3 and the placement mechanism 5 when convenient to the installation mechanism 3 is spacing.

In this embodiment, after the first tray 302 is placed in the supporting frame 201, an operator can loosen the rotating plate 402, the rotating rod 403 drives the rotating plate 402 to reset under the reaction force of the torsion spring 405, so that the rotating rod 403 extrudes the retaining plate 601 again when rotating at the empty slot 203, after the retaining plate 601 receives the interference force of the rotating rod 403, the retaining plate 601 extrudes the telescopic spring 602, the retaining plate 601 drives the clamping block 604 with the fixed end to slide from the sliding slot 603 to the positioning slot 307, the positioning slot 307 is fixedly provided with the rubber pad 304, the clamping block 604 can limit the clamping plate 301 after interfering with the rubber pad 304, and the first tray 302 is convenient to install and detach by the operator while limiting the first tray 302.

Referring to fig. 1 to 9, the placement mechanism 5 includes a plug rod 505, the plug rod 505 is engaged with the slot 305, the plug rod 505 is fixedly connected with the fixing frames 501, and the two fixing frames 501 are fixedly connected with the supporting plate 502. Two fixed slots 506 are symmetrically arranged on the supporting plate 502, the second tray 503 is matched and clamped at the position of the fixed slots 506, two stop rods 504 are symmetrically and fixedly connected on the second tray 503, the placing mechanism 5 is fixed on the mounting mechanism 3 in a clamping and mounting mode, and the placing mechanism 5 is convenient for an operator to mount and dismount while the article placing space is increased. In this embodiment, an operator can place the first tray 302 on a plane, two groups of clamping grooves 306 are formed in the first tray 302, and two baffles 303 are respectively clamped inside the two groups of clamping grooves 306, so that the operator can conveniently pull the first tray 302 and protect articles placed in the first tray 302, and the articles can be prevented from sliding out of the first tray 302 during sliding.

In this embodiment, two slots 305 are further symmetrically arranged on the first tray 302, the inserting rods 505 installed on the fixing frames 501 are inserted into the slots 305, the supporting plate 502 can be supported, the supporting plate 502 is fixedly connected with the two fixing frames 501, after the supporting plate 502 is installed, the second tray 503 is clamped to the fixing slots 506 arranged in the supporting plate 502, the fixing slots 506 limit the second tray 503, so that an operator can conveniently install and detach the second tray, two stop rods 504 are symmetrically and fixedly installed on the second tray 503, and the stop rods 504 are arranged, so that articles in the second tray 503 can be conveniently protected in use.

When the invention is used, firstly, an operator can place the first tray 302 on a plane, two groups of clamping grooves 306 are arranged on the first tray 302, two baffles 303 are respectively clamped into the two groups of clamping grooves 306, furthermore, the first tray 302 can be conveniently pulled by an operator, and meanwhile, the articles placed in the first tray 302 can be protected, so that the articles can be prevented from sliding out of the first tray 302 during sliding; the first tray 302 is also symmetrically provided with two slots 305, the inserting rods 505 arranged on the fixing frames 501 are inserted into the slots 305, the supporting plate 502 can be supported, the supporting plate 502 is fixedly connected with the two fixing frames 501, after the supporting plate 502 is arranged, the second tray 503 is clamped to the fixing slots 506 arranged in the supporting plate 502, the fixing slots 506 limit the second tray 503, and therefore an operator can conveniently install and detach the second tray 503; two stop rods 504 are symmetrically and fixedly arranged on the second tray 503, and the stop rods 504 are arranged so as to be convenient for protecting the articles in the second tray 503 in use.

Two clamping plates 301 are symmetrically and fixedly arranged on the first tray 302, a plurality of positioning grooves 307 are formed in the clamping plates 301 at equal intervals, when the first tray 302 is placed in the supporting frame 201, an operator can press the rotating plate 402 by hand, an anti-slip pad 401 is adhered to the rotating plate 402, the rotating plate 402 is fixedly connected with the rotating rod 403, a connecting shaft 404 fixed on the rotating rod 403 is rotationally connected with the supporting frame 201, when the rotating plate 402 drives the rotating rod 403 to rotate at a position of an empty groove 203 in the supporting frame 201, the connecting shaft 404 can rotate along the supporting frame 201, a torsion spring 405 is sleeved on the connecting shaft 404, the rotating rod 403 is connected with the supporting frame 201 in a matched mode through the torsion spring 405, the torsion spring 405 deforms when the connecting shaft 404 rotates, so that the rotating rod 403 is converted into a state separated from the supporting frame 601 from the state of abutting with the supporting frame 601, after the supporting frame 601 loses the abutting force of the rotating rod 403, the rotating plate is reset under the reacting force of the telescopic spring 602, and then the supporting frame 601 drives a clamping block 604 to slide again to a sliding groove 603 in the supporting frame 201; the operating personnel again with cardboard 301 block to the spacing groove 202 position that is equipped with in the support frame 201, when promoting first tray 302, cardboard 301 can drive the ball 204 rotation of installing in the support frame 201, and the setting of ball 204 can reduce the area of contact between cardboard 301 and the support frame 201, and then is convenient for improve the slip effect of first tray 302 to the operating personnel of being convenient for installs in the support frame 201 with first tray 302.

After the first tray 302 is placed in the supporting frame 201, an operator can loosen the rotating plate 402, the rotating rod 403 drives the rotating plate 402 to reset under the reaction force of the torsion spring 405, then the rotating rod 403 extrudes the abutting plate 601 again when the empty slot 203 rotates, after the abutting plate 601 receives the interference force of the rotating rod 403, the abutting plate 601 extrudes the telescopic spring 602, the abutting plate 601 drives the clamping block 604 fixed at the end to slide from the sliding groove 603 to the positioning groove 307, the positioning groove 307 is fixedly provided with the rubber pad 304, the clamping block 604 abuts against the rubber pad 304, the clamping plate 301 can be limited, and then the first tray 302 is convenient to limit and simultaneously the operator can be convenient to install and detach the first tray 302.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides a novel structure in glove box transition storehouse, includes transition storehouse body (1), transition storehouse body (1) are including transition storehouse body (101), it is connected with sealed door (102) to rotate on transition storehouse body (101), cooperation rotation has rotatory handle (103), its characterized in that on sealed door (102): a fixing mechanism (2) is arranged in the transition bin body (1), and a collision mechanism (4) is rotationally connected to the fixing mechanism (2);

the anti-collision mechanism (4) comprises a rotating plate (402), the rotating plate (402) is rotationally connected with the fixing mechanism (2), an anti-slip pad (401) is adhered to the rotating plate (402), a rotating rod (403) is fixedly connected to the rotating plate (402), a connecting shaft (404) is fixedly installed on the rotating rod (403), and a torsion spring (405) is sleeved on the connecting shaft (404).

2. The glove box transition bin novel structure of claim 1, wherein: the fixing mechanism (2) comprises a supporting frame (201), the connecting shaft (404) is rotationally connected with the supporting frame (201), the rotating rod (403) is matched and connected with the supporting frame (201) through a torsion spring (405), an empty groove (203) is formed in the supporting frame (201), and a rotating plate (402) is matched and rotated at the position of the empty groove (203).

3. The glove box transition bin novel structure of claim 2, wherein: the fixing mechanism (2) further comprises limiting grooves (202), two limiting grooves (202) are symmetrically formed in the supporting frame (201), and balls (204) are matched and rotated at the positions of the limiting grooves (202).

4. The glove box transition bin novel structure of claim 1, wherein: the anti-collision mechanism is characterized in that the anti-collision mechanism (4) is connected with a limiting mechanism (6), the limiting mechanism (6) comprises a supporting plate (601), the rotating rod (403) is abutted against the supporting plate (601), the supporting plate (601) is sleeved with a telescopic spring (602), and the supporting plate (601) is matched and connected with the supporting frame (201) through the telescopic spring (602).

5. The glove box transition bin novel structure of claim 4, wherein: a plurality of clamping blocks (604) are fixedly mounted on the retaining plate (601) at equal intervals, the end parts of the clamping blocks (604) are of cambered surface structures, and a sliding groove (603) is formed in the supporting frame (201).

6. The glove box transition bin novel structure of claim 3, wherein: the fixing mechanism (2) is connected with the mounting mechanism (3) in a sliding manner; the mounting mechanism (3) comprises clamping plates (301), the clamping plates (301) are clamped at the positions of the limiting grooves (202) in a matched mode, the two clamping plates (301) are fixedly connected with the first tray (302), and the balls (204) are in rolling connection with the clamping plates (301).

7. The glove box transition bin novel structure of claim 6, wherein: the mounting mechanism (3) further comprises positioning grooves (307), a plurality of positioning grooves (307) are formed in the clamping plate (301) at equal intervals, rubber pads (304) are mounted on the positioning grooves (307) in a matched mode, and the rubber pads (304) are abutted to the clamping blocks (604).

8. The glove box transition bin novel structure of claim 6, wherein: the mounting mechanism (3) further comprises a slot (305), the first tray (302) is provided with the slot (305) and a clamping groove (306), the clamping groove (306) is matched and clamped with a baffle (303), and the baffle (303) is abutted against the first tray (302).

9. The glove box transition bin novel structure of claim 6, wherein: the mounting mechanism (3) is provided with a placement mechanism (5) in a matched and clamped mode, the placement mechanism (5) comprises an inserting rod (505), the inserting rod (505) is provided with an inserting rod (305) in a matched and clamped mode, the inserting rod (505) is fixedly connected with a fixing frame (501), and the fixing frames (501) are fixedly connected with a supporting plate (502).

10. The glove box transition bin novel structure of claim 9, wherein: the placement mechanism (5) further comprises fixing grooves (506), two fixing grooves (506) are symmetrically formed in the supporting plate (502), a second tray (503) is clamped at the position of the fixing grooves (506) in a matched mode, and two stop rods (504) are symmetrically and fixedly connected to the second tray (503). .