Liquid nitrogen tank pedal

Abstract

The utility model relates to the technical field of liquid nitrogen tanks, in particular to a liquid nitrogen tank pedal which comprises two side plates, at least two baffles are evenly arranged between the two side plates in the longitudinal direction, pedal plates are arranged on one sides of the baffles, the pedal plates are movably arranged on the sides, away from the liquid nitrogen tank, of the side plates, and a supporting rod is movably connected between every two adjacent pedal plates. A telescopic plate is movably arranged in the pedal plate and used for extending a foot treading area of the pedal plate, and a positioning assembly is further arranged on the telescopic plate and used for fixing the telescopic plate and the pedal plate; anti-locking assemblies are arranged on one side or two sides, close to the supporting rod, of the pedal plate; on one hand, due to the arrangement of the foldable device, the occupied space is greatly reduced, and in order to avoid the situation that the pedal is clamped between the two supporting rods due to excessive folding, the anti-locking assemblies are arranged at the positions, close to one side or two sides of the supporting rods, of the pedal, on the other hand, the pedal area can be increased by arranging the telescopic plate in the pedal, and therefore the pedal is more convenient to use. And a user can conveniently and stably stand.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid nitrogen tank technology field, specifically relates to a liquid nitrogen tank pedal. BACKGROUND

[0002] With the progress of science and technology, the use of liquid nitrogen flows into various laboratories, such as the active preservation of animal semen, the active preservation of biological samples, the cryogenic treatment of metal materials, the cryogenic assembly of precision parts, the refrigeration of medical and health industries, and the refrigeration of medical operations.

[0003] With the development of technology, in order to meet the ultra-low temperature storage of more samples, the liquid nitrogen tank is gradually developed from small volume to large volume, and the increase of volume also leads to the increase of the volume of the liquid nitrogen tank body, since the operator needs to open the liquid nitrogen tank cover from the top first, and then realize the access of the sample, and the height of the tank body is high, usually needs to cooperate with the pedal, lets the operator stand on the pedal and carries out the subsequent operation, the existing pedal is usually a step type pedal, some are independent step stools of the liquid nitrogen tank, and some are integrated step type pedals with the liquid nitrogen tank body, however, the two forms of foot pedals occupy a certain experimental space, which is not convenient for some limited space. SUMMARY

[0004] The utility model aims at solving the above-mentioned insufficient, provides a liquid nitrogen tank pedal.

[0005] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0006] A liquid nitrogen tank pedal, including two side plates, at least two baffle plates are arranged longitudinally and uniformly between the two side plates, one side of the baffle plate is provided with a foot pedal, the foot pedal is movably arranged on the side of the side plate away from the liquid nitrogen tank, and a supporting rod is movably connected between the adjacent two foot pedals;

[0007] The foot pedal is movably provided with an expansion plate, which is used to extend the foot stepping area of the foot pedal, and the expansion plate is further provided with a positioning assembly for fixing the expansion plate and the foot pedal;

[0008] The side or both sides of the foot pedal close to the supporting rod are provided with an anti-locking assembly.

[0009] Further, the side wall of the expansion plate is provided with a movable groove, the positioning assembly includes a pressing plate sliding in the movable groove, one side of the pressing plate is connected with the inner wall of the movable groove through a limiting spring, the side of the pressing plate away from the limiting spring is provided with a positioning rod extending out of the expansion plate, and the side wall of the foot pedal is provided with a limiting hole matched with the positioning rod.

[0010] Further, the footboard is internally provided with a limiting assembly, which is used for limiting the distance of the outward movement of the telescopic plate.

[0011] Further, the limiting assembly comprises a fixing frame fixed in the footboard, a guide rod is arranged in the fixing frame, and a limiting slider is arranged on the side wall of the telescopic plate and sleeved on the guide rod.

[0012] Further, a reset spring is arranged on the guide rod between the limiting slider and the fixing frame, and the reset spring is used for pushing the sliding of the limiting slider.

[0013] Further, the footboard is rotatably connected with the side plate through a first rotating shaft, and a second rotating shaft is arranged on the side wall of each two adjacent footboards, and the support rod is sleeved on the second rotating shaft.

[0014] Further, the anti-locking assembly is arranged between the positioning assembly and the second rotating shaft.

[0015] Compared with the prior art, the utility model has the beneficial effects of:

[0016] The liquid nitrogen tank footboard provided by the application can be folded, so that the occupied space is greatly reduced, and the footboard is prevented from being locked between the two support rods due to excessive folding by arranging an anti-locking assembly on one side or both sides of the footboard close to the support rod, so that the anti-locking assembly is in abutment with the support rod when the footboard is folded to be perpendicular to the ground, thereby preventing the footboard from being locked, and realizing the anti-locking function of the footboard; on the other hand, the telescopic plate arranged in the footboard can increase the footboard area, so that the user can stand stably, and the telescopic plate can be retracted when not in use, and then the telescopic plate is fixed by the positioning assembly, so that the occupied space is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of the application form a part of the application and serve to provide further understanding of the application, and the illustrative embodiments of the application and their descriptions serve to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0018] Figure 1 is an unfolded schematic view of the application;

[0019] Figure 2 is a folded schematic view of the application;

[0020] Figure 3 is a structural schematic view of the limiting assembly of the application;

[0021] Figure 4 is a sectional view of the positioning assembly of the application.

[0022] In the figure: 1, side plate; 2, baffle; 3, foot pedal; 31, first rotating shaft; 32, second rotating shaft; 4, supporting rod; 5, telescopic plate; 51, limiting sliding block; 6, limiting assembly; 61, fixing frame; 62, guide rod; 63, return spring; 7, positioning assembly; 71, pressing plate; 72, limiting spring; 73, positioning rod; 8, anti-lock assembly. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. In the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0025] Referring to Figures 1-4 As shown in the figure, a liquid nitrogen tank pedal, comprising two side plates 1, at least two baffles 2 are arranged between the two side plates 1, a foot pedal 3 is arranged on one side of the baffle 2, the foot pedal 3 is rotatably connected with the side plate 1 through a first rotating shaft 31, and after being unfolded, the rear end of the foot pedal 3 will be turned over to the bottom of the baffle 2, the baffle 2 is used for blocking the foot pedal 3, the sidewall of the two foot pedals 3 is further provided with a second rotating shaft 32, a supporting rod 4 is sleeved on the two second rotating shafts 32, and mainly when turning over, the supporting rod 4 can drive the two foot pedals 3 to turn over together, and further comprising:

[0026] A telescopic plate 5 is movably arranged in the foot pedal 3 and is used for extending the stepping area of the foot pedal 3;

[0027] A positioning assembly 7 is arranged on the telescopic plate 5, at the beginning, the telescopic plate 5 is retracted in the foot pedal 3, and then the telescopic plate 5 and the foot pedal 3 can be fixed through the positioning assembly 7;

[0028] A limiting assembly 6 is used for limiting the distance of the outward movement of the telescopic plate 5, and can avoid the telescopic plate 5 from being separated from the foot pedal 3.

[0029] In an embodiment, the side wall of the telescopic plate 5 is provided with a movable slot, the positioning assembly 7 comprises a pressing plate 71 sliding in the movable slot, one side of the pressing plate 71 is connected with the inner wall of the movable slot through a limiting spring 72, and the side of the pressing plate 71 away from the limiting spring 72 is provided with a positioning rod 73 extending out of the telescopic plate 5; the side wall of the foot plate 3 is provided with a limiting hole matched with the positioning rod 73.

[0030] At the beginning, the telescopic plate 5 is located in the foot plate 3, at this time, the positioning rod 73 is inserted into the limiting hole in the side wall of the foot plate 3; when the telescopic plate 5 needs to be extended outward, the positioning rod 73 is pressed inward, the positioning rod 73 compresses the limiting spring 72 inward through the pressing plate 71, and the positioning rod 73 is separated from the foot plate 3, at this time, the telescopic plate 5 can be pulled out outward; the telescopic plate 5 is retracted in the same way, that is, the positioning rod 73 is first retracted by being pressed inward, and then the telescopic plate 5 is pushed inward, finally the positioning rod 73 is inserted into the limiting hole under the elastic force of the limiting spring 72, so that the telescopic plate 5 is fixed.

[0031] In an embodiment, the limiting assembly 6 comprises a fixed frame 61 fixed in the foot plate 3, the fixed frame 61 is provided with a guide rod 62, and the side wall of the telescopic plate 5 is provided with a limiting sliding block 51 sleeved on the guide rod 62, which is used for limiting the outward movement of the telescopic plate 5, so as to avoid that the telescopic plate 5 is directly pulled out from inside.

[0032] In an embodiment, a return spring 63 sleeved on the guide rod 62 is arranged between the limiting sliding block 51 and the fixed frame 61, and the return spring 63 is used for pushing the sliding of the limiting sliding block 51.

[0033] When the telescopic plate 5 is retracted, the return spring 63 is in a compressed state, after the positioning rod 73 is pressed inward, the telescopic plate 5 is pushed outward under the elastic force of the return spring 63, so that the telescopic plate 5 can automatically extend outward.

[0034] In an embodiment, the number of foot plates 3 is two, the upper one is a first foot plate, and the lower one is a second foot plate; the positioning assembly 7 and the second rotating shaft 32 are provided with an anti-lock assembly 8 fixed on the second foot plate at the bottom; this is mainly used for rotating the two foot plates 3 upward along the first rotating shaft 31 when the foot plates 3 are retracted, and the second foot plate at the bottom gradually approaches the supporting rod 4 when it is rotated upward, if there is no anti-lock assembly 8, the second foot plate is easy to overturn excessively, so as to press the supporting rod 4 to rotate inward, which is easy to cause that the second foot plate and the supporting rod 4 are too close and not easy to open; the anti-lock assembly 8 is used for blocking the second foot plate to avoid excessive overturning, and specifically, the anti-lock assembly 8 is a bolt in this embodiment.

[0035] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and are non-limiting, the scope of the present application being defined by the appended claims rather than by the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A liquid nitrogen tank pedal, comprising two side plates (1), at least two baffle plates (2) are arranged longitudinally and uniformly between the two side plates (1), and one side of each of the baffle plates (2) is provided with a foot pedal (3), characterized in that, The footboard (3) is movably arranged on the side plate (1) away from the liquid nitrogen tank, and a supporting rod (4) is movably connected between two adjacent footboards (3). A telescopic plate (5) is movably arranged in the footboard (3) to extend the foot stepping area of the footboard (3), and a positioning assembly (7) is arranged on the telescopic plate (5) to fix the telescopic plate (5) and the footboard (3). The footboard (3) is provided with an anti-lock assembly (8) on one side or both sides close to the supporting rod (4).

2. The liquid nitrogen tank pedal of claim 1, wherein, A movable groove is formed in the side wall of the telescopic plate (5), the positioning assembly (7) includes a pressing plate (71) sliding in the movable groove, one side of the pressing plate (71) is connected to the inner wall of the movable groove through a limiting spring (72), and a positioning rod (73) extending out of the telescopic plate (5) is arranged on the side of the pressing plate (71) away from the limiting spring (72), and a limiting hole matched with the positioning rod (73) is formed in the side wall of the footboard (3).

3. The liquid nitrogen tank pedal of claim 1, wherein, A limiting assembly (6) is further arranged in the footboard (3), and the limiting assembly (6) is used to limit the distance of the outward movement of the telescopic plate (5).

4. The liquid nitrogen tank pedal of claim 3, wherein, The limiting assembly (6) includes a fixed frame (61) fixed in the footboard (3), a guide rod (62) is arranged in the fixed frame (61), and a limiting sliding block (51) is arranged on the side wall of the telescopic plate (5) and sleeved on the guide rod (62).

5. A liquid nitrogen tank pedal according to claim 4, wherein A reset spring (63) is arranged between the limiting sliding block (51) and the fixed frame (61) and sleeved on the guide rod (62), and the reset spring (63) is used to push the sliding of the limiting sliding block (51).

6. The liquid nitrogen tank pedal of claim 1, wherein, The footboard (3) is rotatably connected to the side plate (1) through a first rotating shaft (31), and a second rotating shaft (32) is further arranged on the side wall of the adjacent footboard (3), and the supporting rod (4) is sleeved on the second rotating shaft (32).

7. A liquid nitrogen tank pedal according to claim 6, wherein The anti-lock assembly (8) is arranged between the positioning assembly (7) and the second rotating shaft (32).

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