CN220780433U - Fixed locking device - Google Patents

Abstract

The utility model discloses a fixing and locking device, and belongs to the technical field of sample tube fixing devices. The fixing and locking device comprises a supporting seat and a clamping assembly, wherein an accommodating hole for accommodating the sample tube is formed in the supporting seat, the clamping assembly comprises a locking piece, the locking piece is movably arranged at the accommodating hole and can move to a first position where the accommodating hole is partially shielded and the sample tube is limited in the accommodating hole, and the locking piece can move to a second position where the shielding area of the accommodating hole is reduced and the sample tube can enter and exit the accommodating hole. This fixed locking device is through setting up mobilizable retaining member in holding the hole department, can be with the sample tube spacing in holding the hole steadily when the retaining member is in the first position for the sample tube is difficult for taking place to remove, and stability is higher, and can freely get in and out holding the hole when the locking tube is in the second position, gets and puts conveniently.

Description

Fixed locking device

Technical Field

The utility model relates to the technical field of sample tube fixing devices, in particular to a fixing and locking device.

Background

The sample tube is a commonly used container for containing a sample reagent, and is an indispensable structure for performing a test. The sample tube is generally placed on a sample rack, a plurality of holes which are regularly arranged are formed in the sample rack, and the sample tube is directly inserted into the holes.

However, if the sample tubes have different tube diameters, the size of the hole needs to be set to be larger than the size of the hole if one sample rack is used to support the sample tubes with different tube diameters, which results in the stability of the sample tubes to be reduced, and the sample tubes are not suitable for the situation that the sample tubes need to be taken and placed for a long time. However, if the hole is set to be smaller, the difficulty of taking and placing is increased, and the method is not suitable for the situation that the sample tube needs to be frequently taken and placed.

Therefore, how to provide a device that can effectively fix a sample tube, and is convenient to take and place, and that gives attention to both the operation convenience and the fixing effect is a technical problem that needs to be solved at present.

Disclosure of Invention

The utility model aims to provide a fixing and locking device which can effectively fix a sample tube, is convenient to take and place and has both operation convenience and fixing stability.

To achieve the purpose, the utility model adopts the following technical scheme:

a securing and locking device comprising: the support seat is provided with an accommodating hole for accommodating the sample tube; a clamping assembly including a locking member movably disposed at the receiving hole; the locking member can move to a first position where the holding hole is partially shielded and the sample tube is limited in the holding hole, and the locking member can move to a second position where the shielding area of the holding hole is reduced and the sample tube can enter and exit the holding hole.

Preferably, the clamping assembly further comprises a pull rod and a first elastic piece, the pull rod is slidably arranged on the supporting seat along a first direction, one end of the first elastic piece is connected with the pull rod, and the other end of the first elastic piece is connected with the locking piece.

Preferably, a first elongated hole is formed in the locking member along the first direction; the clamping assembly further comprises a limiting piece, the limiting piece is arranged on the pull rod and penetrates through the first strip-shaped hole, the length of the first strip-shaped hole in the first direction is larger than the size of the limiting piece in the first direction, and the limiting piece can move in the first strip-shaped hole along the first direction.

Preferably, the clamping assembly further comprises a rotary handle, one end of the rotary handle is rotatably connected to the supporting seat, a second long-strip hole is formed in the middle of the rotary handle, a convex column is arranged on the pull rod, the convex column is rotatably arranged in the second long-strip hole in a penetrating mode, and the convex column can move in the length direction in the second long-strip hole.

Preferably, the pull rod is provided with a mounting groove, and the first elastic piece and the locking piece are both positioned in the mounting groove.

Preferably, a limiting clamping groove is formed in one side, facing the accommodating hole, of the locking piece, and the limiting clamping groove is used for accommodating the sample tube.

Preferably, the inner wall surface of the limit clamping groove is gradually arranged in an outward inclined manner from top to bottom.

Preferably, the number of the accommodating holes is a plurality, and the accommodating holes are arranged in rows and columns; the number of the locking pieces is the same as the number of the rows of the containing holes, a plurality of locking pieces are arranged at intervals, and each locking piece is provided with a limiting clamping groove with the same number of columns of the containing holes.

Preferably, the fixing and locking device further comprises a second elastic member, one end of the second elastic member is connected with the supporting seat, and the other end of the second elastic member is connected with the pull rod.

Preferably, the fixing and locking device further comprises a top limiting plate, the top limiting plate is covered on the supporting seat, and a positioning hole for the sample tube to pass through is formed in the top limiting plate.

The utility model has the beneficial effects that:

the fixing and locking device comprises a supporting seat and a clamping assembly, wherein an accommodating hole for accommodating a sample tube is formed in the supporting seat, the clamping assembly comprises a locking piece, the locking piece is movably arranged at the accommodating hole and can move to a first position for partially shielding the accommodating hole and limiting the sample tube in the accommodating hole, and the locking piece can move to a second position for reducing the shielding area of the accommodating hole and enabling the sample tube to enter and exit the accommodating hole. This fixed locking device is through setting up mobilizable retaining member in holding the hole department, can be with the sample tube spacing in holding the hole steadily when the retaining member is in the first position for the sample tube is difficult for taking place to remove, and stability is higher, and can freely get in and out holding the hole when the locking tube is in the second position, gets and puts conveniently.

Drawings

FIG. 1 is a schematic view of a stationary locking device according to an embodiment of the present utility model;

FIG. 2 is a front view of a stationary locking device provided by an embodiment of the present utility model;

FIG. 3 is an exploded view of a securing latch provided in accordance with an embodiment of the present utility model;

FIG. 4 is a schematic view of the fixing and locking device according to the embodiment of the present utility model after the top limiting plate is removed;

FIG. 5 is a schematic view of a clamping assembly and a handle retention block provided in an embodiment of the present utility model;

FIG. 6 is a schematic view of a portion of the structure of a clamping assembly and a second resilient member provided in an embodiment of the present utility model;

FIG. 7 is a schematic view of a support base according to an embodiment of the present utility model;

fig. 8 is a schematic view of a locking member according to an embodiment of the present utility model.

In the figure:

10. a sample tube;

100. a support base; 101. a receiving hole; 102. a chute; 103. a cavity; 104. a second connection hole; 110. a handle fixing block; 111. a rotating shaft; 120. a second hanging rod;

200. a clamping assembly; 210. a locking member; 211. a first elongated aperture; 212. a limit clamping groove; 213. an inclined plane; 214. a limit groove; 220. a pull rod; 221. a convex column; 222. a mounting groove; 223. a first hanger bar; 230. a first elastic member; 240. a limiting piece; 250. rotating the handle; 251. a horizontal pulling plate; 252. a vertical pulling plate; 253. a rotation shaft hole; 254. a second elongated aperture;

300. a top limit plate; 301. positioning holes; 302. a first connection hole;

400. and a second elastic member.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 and 2, the present utility model provides a fixing and locking device that can be used to fix a plurality of sample tubes 10, and is particularly suitable for fixing a plurality of sample tubes 10 having different tube diameters in a small range. Moreover, the fixing and locking device has wide application range, and is not only suitable for the situation that the sample tube 10 needs to be stably stored on the fixing and locking device for a long time, but also suitable for the situation that the sample tube 10 needs to be frequently taken and placed. In addition, the use of the securing device can also increase the stability during transfer if a plurality of sample tubes 10 need an overall transfer position. The sample tube 10 is generally a cylindrical tube, but may be a tube of other shapes than a cylindrical tube.

In particular, as shown in fig. 1 to 8, the fixing and locking device includes a support base 100 and a clamping assembly 200. The supporting seat 100 is a main structure for supporting the sample tube 10, the supporting seat 100 is formed with a plurality of accommodating holes 101 for accommodating the sample tube 10, the number of the accommodating holes 101 can be set to be a plurality of according to requirements, and the accommodating holes 101 can be regularly arranged in rows and columns, in a circular array or in other shapes on the supporting seat 100, or can be irregularly arranged. The clamping assembly 200 includes a locking member 210, the locking member 210 being movably disposed at the receiving hole 101. The locking member 210 can be moved to a first position where the holding hole 101 is partially blocked and the sample tube 10 is limited to the holding hole 101, and the locking member 210 can be moved to a second position where the blocking area of the holding hole 101 becomes smaller and the sample tube 10 can enter and exit the holding hole 101. The number of the locking members 210 may be set to one or more according to the need, but it is required to ensure that at least each of the receiving holes 101 has the locking member 210, i.e., the plurality of receiving holes 101 may share one locking member 210, or that each of the receiving holes 101 may have one or more locking members 210.

In order to make the fixing and locking device suitable for a plurality of sample tubes 10 having different tube diameters in a small range, and to facilitate manufacturing of the accommodating hole 101, the plurality of accommodating holes 101 are generally provided with the same aperture, and the aperture is set to be larger than the sample tube 10 having the largest tube diameter to be placed. Of course, the plurality of receiving holes 101 may be provided with different apertures, and the receiving holes 101 with different apertures may be used for placing the sample tubes 10 with different tube diameters.

When the sample tube 10 needs to be fixedly stored, the locking member 210 can be moved to the second position, and the accommodating hole 101 is less blocked, so that the sample tube 10 can easily enter the accommodating hole 101; after the sample tube 10 enters the accommodating hole 101, the locking piece 210 is moved from the second position to the first position, and the locking piece 210 shields part of the accommodating hole 101 and is abutted against the sample tube 10, so that the sample tube 10 is limited in the accommodating hole 101 with reduced passing area, shaking is not easy to occur, and stability is improved; when it is necessary to take the sample tube 10 out of the accommodation hole 101, the locking member 210 is moved from the first position to the second position, at which time the passable area of the accommodation hole 101 is increased, and the sample tube 10 can be easily taken out of the accommodation hole 101.

In some embodiments, retaining member 210 is disposed at the opening of receiving bore 101. In some embodiments, the locking member 210 is disposed in the supporting seat 100 in a penetrating manner, a sliding way is disposed in the supporting seat 100 in a penetrating manner, and the sliding way extends along a first direction and is communicated with the accommodating hole 101, and extends through the supporting seat 100 in a second direction, and the locking member 210 is in a strip shape and can be inserted into the sliding way along the second direction and move in the first direction, so that a part of the structure of the locking member 210 can enter the accommodating hole 101. The number of slides is equal to the number of retaining members 210, and in some embodiments, the number of slides is multiple, the multiple slides being spaced apart in the first direction.

To effect movement of retaining member 210, with continued reference to FIG. 3, clamping assembly 200 further includes a pull rod 220 and a first resilient member 230. The pull rod 220 is slidably disposed on the support base 100 along the first direction, and in some embodiments, a sliding slot 102 is disposed on the support base 100, and the pull rod 220 is disposed in the sliding slot 102 and can move along the sliding slot 102; in some other embodiments, the support 100 is provided with a sliding rail, and the pull rod 220 is provided with a slider, and the slider is slidably connected to the sliding rail. One end of the first elastic member 230 is connected to the pull rod 220, and the other end of the first elastic member 230 is connected to the locking member 210.

The locking member 210 can be maintained at the first position by the first elastic member 230, that is, the initial position of the locking member 210 is the first position, and if the sample tube 10 needs to be placed in the receiving hole 101, the locking member 210 needs to be moved from the first position to the second position. In some embodiments, the first elastic member 230 is a compression spring, i.e., the first elastic member 230 is in a compressed state.

In some embodiments, each locking member 210 corresponds to a plurality of first elastic members 230, for example, as shown in fig. 4 and 5, each locking member 210 corresponds to two first elastic members 230, the two first elastic members 230 are disposed at intervals in the second direction, and one end of each first elastic member 230 is connected to the pull rod 220, and the other end is connected to the locking member 210.

Further, as shown in fig. 8, a limiting groove 214 is provided on the locking member 210, and an end of the first elastic member 230 is limited in the limiting groove 214. The number of the limiting grooves 214 is the same as the number of the first elastic members 230, and in some embodiments, two limiting grooves 214 are provided on each locking member 210.

In some embodiments, to improve the compactness of the overall securing latch, and with continued reference to fig. 4, a mounting slot 222 is provided in the pull rod 220, and both the first resilient member 230 and the latch 210 are positioned within the mounting slot 222.

Optionally, the mounting groove 222 includes a first groove portion and a second groove portion, where the first groove portion extends along the first direction, and the second groove portion extends along the second direction, and the first groove portion is used for accommodating the first elastic member 230, and the second groove portion is used for accommodating at least part of the locking member 210. In some embodiments, the first direction is the length direction of the pull rod 220, the second direction is the width direction of the pull rod 220, and the second slot extends through two opposite sides of the pull rod 220 in the width direction, and the middle portion of the locking member 210 is embedded in the second slot.

To enable retaining member 210 to be maintained in the first position, and with continued reference to FIG. 1, retaining member 210 is provided with a first elongated aperture 211 in a first direction, and clamping assembly 200 further includes a stop 240, stop 240 being provided on pull rod 220 and disposed through first elongated aperture 211. And the length of the first elongated hole 211 in the first direction is greater than the dimension of the limiting member 240 in the first direction, so that the limiting member 240 can move in the first direction within the first elongated hole 211. Under the driving of the first elastic member 230, the locking member 210 has a tendency to move to increase the shielding area of the accommodating hole 101, the first elongated hole 211 moves along with the movement, and when the end of the first elongated hole 211 abuts against the limiting member 240 due to the fixed limiting member 240, the locking member 210 stops moving.

In some embodiments, the limiting member 240 includes a limiting cap and a limiting post that are coaxially connected, where the size of the limiting cap is greater than the size of the limiting post, and an end of the limiting post away from the limiting cap can be connected with the pull rod 220 through the first elongated hole 211, and the connection manner includes, but is not limited to, threaded connection, plugging, welding, etc., and the size of the limiting cap is greater than the width of the first elongated hole 211, so that the limiting cap can be limited to a side of the locking member 210 away from the pull rod 220.

In some embodiments, the first elongate aperture 211 is a kidney-shaped aperture. Of course, in other embodiments, the first elongated hole 211 may be a rectangular hole or other irregular through holes with a length greater than the width.

In some embodiments, if the number of the locking members 210 is plural, the number of the limiting members 240 is plural, the plurality of limiting members 240 are disposed on the pull rod 220 at intervals, and the plurality of limiting members 240 are connected to the plurality of locking members 210 in a one-to-one correspondence.

In order to drive the pull rod 220 to move along the first direction, as shown in fig. 3, the clamping assembly 200 further includes a rotary handle 250, one end of the rotary handle 250 is rotatably connected to the supporting seat 100, a second elongated hole 254 is provided in the middle of the rotary handle 250, a boss 221 is provided on the pull rod 220, the boss 221 is rotatably inserted into the second elongated hole 254, and the boss 221 can move in the length direction in the second elongated hole 254.

By driving the rotary handle 250 to rotate, a pulling force can be given to the pull rod 220, and the rotary motion of the rotary handle 250 can be converted into a movement of the pull rod 220 along the first direction because the pull rod 220 is limited in the chute 102 and the position of the boss 221 in the second elongated hole 254 can be changed.

In some embodiments, as shown in fig. 3, the rotary handle 250 is generally in a pi shape, and includes a horizontal pulling plate 251 and two vertical pulling plates 252 protruding below the horizontal pulling plate 251, where a rotation shaft hole 253 is provided at a lower end of each vertical pulling plate 252, and the rotation shaft hole 253 is a circular hole. Two handle fixing blocks 110 are arranged at intervals at the end part of the supporting seat 100, a space for accommodating two vertical pulling plates 252 is formed between the two handle fixing blocks 110, a rotating shaft 111 is further arranged on the inner side of each handle fixing block 110 in a protruding mode, the rotating shaft 111 is a cylinder, and the rotating shaft 111 is rotatably connected in a rotating shaft hole 253 on the corresponding side, so that the rotating connection between the rotating handle 250 and the supporting seat 100 can be realized.

Further, each vertical pulling plate 252 is further provided with a second elongated hole 254, the second elongated holes 254 may be kidney-shaped holes, rectangular holes, etc., two sides of the pulling rod 220 are respectively provided with a protruding column 221, and the two protruding columns 221 are inserted into the two second elongated holes 254 in a one-to-one correspondence.

With continued reference to fig. 8, in order to enhance the limiting effect of the locking member 210 on the sample tube 10, a limiting slot 212 is disposed on a side of the locking member 210 facing the accommodating hole 101, and the limiting slot 212 is used for accommodating the sample tube 10. In some embodiments, the limit clip slot 212 is a triangular slot; in some embodiments, the retention slot 212 is an arcuate slot, such as a semi-circular slot.

Further, in order to more conveniently place the sample tube 10, the inner wall surface of the stopper groove 212 is provided with a slope 213 gradually inclined outward from top to bottom. Of course, the inner wall surface of the limiting slot 212 may be an arc surface gradually inclined outwards from top to bottom.

In order to make the layout more reasonable, the plurality of accommodating holes 101 are arranged in rows and columns, the number of locking pieces 210 is the same as the number of rows of the accommodating holes 101, the plurality of locking pieces 210 are arranged at intervals, and each locking piece 210 is provided with a limit clamping groove 212 which is the same as the number of columns of the accommodating holes 101.

With continued reference to fig. 6, in order to enable the pull rod 220 to automatically reset after the rotary wrench is released, the fixing and locking device further includes a second elastic member 400, one end of the second elastic member 400 is connected to the support 100, and the other end of the second elastic member 400 is connected to the pull rod 220.

In some embodiments, as shown in fig. 7, a cavity 103 is further disposed in the support base 100 below the chute 102, and the second elastic member 400 is disposed in the cavity 103.

In some embodiments, the second elastic member 400 is a tension spring, a first hanging rod 223 is disposed at the lower end of the pull rod 220, a second hanging rod 120 is disposed in the supporting seat 100, one end of the tension spring is hung on the first hanging rod 223, and the other end of the tension spring is hung on the second hanging rod 120.

With continued reference to fig. 3, the fixing and locking device further includes a top limiting plate 300, the top limiting plate 300 is covered on the supporting seat 100, positioning holes 301 for the sample tubes 10 to pass through are provided on the top limiting plate 300, the number of the positioning holes 301 is the same as that of the containing holes 101, and the positioning holes 301 are communicated in a one-to-one correspondence manner, and are used for positioning the sample tubes 10. The top limiting plate 300 can protect the structure disposed in the supporting seat 100 from foreign matters entering the supporting seat 100.

In some embodiments, as shown in fig. 3 and 7, a first connection hole 302 is further provided on the top limiting plate 300, and a second connection hole 104 is further provided on the top surface of the support base 100, and the connection member is fixed in the second connection hole 104 after passing through the first connection hole 302. Optionally, the first connecting hole 302 is a light hole, the second connecting hole 104 is a threaded hole, and the connecting member is a screw. Of course, in other embodiments, the top limiting plate 300 and the supporting seat 100 may be detachably connected by a snap connection, magnetic attraction, or the like.

In addition, the fixing and locking device can be fixed above an external temperature control module, and the fixing and locking device is matched with the temperature control module for use to perform low-temperature or high-temperature treatment on the sample in the sample tube 10, and avoid shaking of the sample tube 10 in the treatment process. Of course, the fixing and locking device can also be used in combination with a pipetting module as a loading level for fixing and placing the sample tube 10.

The working process of the fixing and locking device is as follows:

the initial position of the locking member 210 is a first position, if the accommodating hole 101 is empty and the sample tube 10 needs to be placed, the rotating handle 250 is driven to rotate around the rotating shaft 111, after the compression spring releases a certain compression force, the limiting member 240 fixed on the pull rod 220 is in extremely limited contact with the end part of the first strip hole 211 on the locking member 210, and the limiting member 240 drives the locking member 210 to move along with the pull rod 220 in the rotating direction of the rotating handle 250, so that the rotating handle 250 can drive the pull rod 220 and the locking member 210 to translate along the first direction, and the sample tube 10 can be penetrated to the accommodating hole 101 from the positioning hole 301 of the top limiting plate 300 after the locking member 210 moves to the second position. If the sample tube 10 is contained in the containing hole 101 and the sample tube 10 needs to be taken out, the process of taking out the sample tube 10 is the same, and will not be described here.

After the sample tube 10 is placed or removed, the pull rod 220 may be reset by a tension spring or by manually resetting the rotary handle 250. If the sample tube 10 is to be placed, the compression force provided by the compression spring returns the retaining member 210 to the first position to stabilize the sample tube 10.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A securing and locking device, comprising:

a support base (100), wherein a containing hole (101) for containing the sample tube (10) is formed on the support base (100);

-a clamping assembly (200), the clamping assembly (200) comprising a locking member (210), the locking member (210) being movably arranged at the receiving hole (101);

the locking piece (210) can move to a first position where the accommodating hole (101) is partially blocked and the sample tube (10) is limited to the accommodating hole (101), and the locking piece (210) can move to a second position where the blocking area of the accommodating hole (101) is reduced and the sample tube (10) can enter and exit the accommodating hole (101).

2. A stationary locking device as claimed in claim 1, characterized in that,

the clamping assembly (200) further comprises a pull rod (220) and a first elastic piece (230), the pull rod (220) is arranged on the supporting seat (100) in a sliding mode along a first direction, one end of the first elastic piece (230) is connected with the pull rod (220), and the other end of the first elastic piece (230) is connected with the locking piece (210).

3. A stationary locking device as claimed in claim 2, wherein,

a first strip hole (211) is formed in the locking piece (210) along the first direction;

the clamping assembly (200) further comprises a limiting piece (240), the limiting piece (240) is arranged on the pull rod (220) and penetrates through the first strip-shaped hole (211), and the length of the first strip-shaped hole (211) in the first direction is larger than the size of the limiting piece (240) in the first direction, so that the limiting piece (240) can move in the first direction in the first strip-shaped hole (211).

4. A stationary locking device as claimed in claim 2, wherein,

the clamping assembly (200) further comprises a rotary handle (250), one end of the rotary handle (250) is rotatably connected to the supporting seat (100), a second strip hole (254) is formed in the middle of the rotary handle (250), a protruding column (221) is arranged on the pull rod (220), the protruding column (221) is rotatably arranged in the second strip hole (254), and the protruding column (221) can move in the length direction in the second strip hole (254).

5. A stationary locking device as claimed in claim 2, wherein,

the pull rod (220) is provided with a mounting groove (222), and the first elastic piece (230) and the locking piece (210) are both positioned in the mounting groove (222).

6. A stationary locking device as claimed in claim 1, characterized in that,

one side of the locking piece (210) facing the accommodating hole (101) is provided with a limiting clamping groove (212), and the limiting clamping groove (212) is used for accommodating the sample tube (10).

7. The stationary locking device as claimed in claim 6, wherein,

the inner wall surface of the limit clamping groove (212) is gradually arranged in an outward inclined manner from top to bottom.

8. The stationary locking device as claimed in claim 6, wherein,

the number of the accommodating holes (101) is multiple, and the accommodating holes (101) are arranged in rows and columns;

the number of the locking pieces (210) is the same as the number of the rows of the containing holes (101), a plurality of locking pieces (210) are arranged at intervals, and each locking piece (210) is provided with a limit clamping groove (212) the same as the number of the columns of the containing holes (101).

9. A stationary locking device as claimed in claim 2, wherein,

the fixed locking device further comprises a second elastic piece (400), one end of the second elastic piece (400) is connected with the supporting seat (100), and the other end of the second elastic piece (400) is connected with the pull rod (220).

10. A stationary locking device according to any one of claims 1 to 9, characterized in that,

the fixing and locking device further comprises a top limiting plate (300), the top limiting plate (300) is arranged on the supporting seat (100) in a covering mode, and a positioning hole (301) used for the sample tube (10) to penetrate through is formed in the top limiting plate (300).