CN113559955B - Clamping mechanism and transfer device - Google Patents

Abstract

The application relates to the technical field of analysis and inspection equipment, in particular to a clamping mechanism and a transfer device. A clamping mechanism comprises a clamping jaw and a bearing plate; the supporting plate is positioned below the clamping jaw, and a clamping space is formed between the clamping jaw and the supporting plate; a clamping groove is formed in the clamping end part of the clamping jaw; the bearing plate is provided with a limiting bulge; when treating that the holder is located the centre gripping space, and the arch inserts the centre gripping inslot, spacing protruding card is located the recess in, fixture can be with treating that the holder presss from both sides. The clamping mechanism is utilized to clamp the to-be-clamped piece, manual operation is replaced, on one hand, the working efficiency is improved, and on the other hand, the to-be-clamped piece is guaranteed not to be polluted.

Description

Clamping mechanism and transfer device

technical field

The present application relates to the technical field of analysis and inspection equipment, and in particular, to a clamping mechanism and a transfer device.

Background technique

The basis of molecular detection is to analyze the tissue cells, hair, anticoagulated or dried blood of the subject, as well as the genes and their expression products in formaldehyde-fixed, paraffin-embedded tissues, by completing nucleic acid (DNA and RNA) at the molecular level. ) detection, which can be accurately detected once the disease occurs or even before symptoms, signs and biochemical changes appear.

First, extract nucleic acid from the sample, then introduce the nucleic acid extract into the reconstitution chamber for reconstitution, and finally introduce the reconstituted liquid into the capillary tube supported by the capillary bracket, and then carry out sample processing, physical processing, and heating on the capillary tube. A series of operations such as processing and transfer processing.

However, when transferring the capillary tube, the existing capillary tube holder is firstly covered with the end cap by hand-held method, and then the capillary tube holder is transferred by hand-held method. The above operations are not only cumbersome, time-consuming and laborious, but also the whole operation. The process easily contaminates the capillary and affects the purity of the extract.

SUMMARY OF THE INVENTION

The first object of the present application is to provide a clamping mechanism, which to a certain extent solves the problem of using a hand-held method to clamp the capillary bracket and complete the capillary installation operation of the capillary bracket in the prior art, which has low work efficiency and pollution. Technical issues with capillaries.

The second object of the present application is to provide a transfer device, to a certain extent, to solve the technical problem of transferring the capillary stent by hand in the prior art, which has low working efficiency and contaminates the capillary.

Based on the first objective, the present application provides a clamping mechanism for clamping a to-be-clamped piece, the top end of the to-be-clamped piece has a protrusion, and the bottom end of the to-be-clamped piece has a groove; the clamping mechanism includes: Grippers and support plates;

The supporting plate is located below the clamping jaws and is at a predetermined distance from the clamping jaws, so that a clamping space is formed between the clamping jaws and the supporting plate;

The clamping end of the clamping jaw is provided with a clamping groove; the support plate is provided with a limit protrusion;

When the to-be-clamped member is located in the clamping space and the protrusion can be inserted into the clamping groove, the limiting protrusion can be clamped in the groove.

In the above technical solution, further, the number of the clamping jaws and the supporting plate is multiple;

A plurality of the clamping claws are arranged at intervals along the first direction, a plurality of the supporting plates are arranged at intervals along the first direction, and a plurality of the clamping claws and a plurality of the supporting plates are arranged one by one corresponding settings.

In the above technical solution, further, the number of the clamping jaws and the number of the supporting plate is two respectively.

In the above technical solution, further, the clamping mechanism further includes a first drive assembly, and the first drive assembly includes a fixed cylinder, a first drive member and a lead screw;

The output shaft of the first driving member is connected with the lead screw, and the lead screw is in driving connection with the fixed cylinder;

The first driving member can drive the fixing cylinder to move in the second direction through the lead screw, so as to make the clamping jaw and the support plate move in the second direction.

In the above technical solution, further, the clamping mechanism further includes a first support frame and a second support frame disposed inside the first support frame;

The first driving member is arranged on the first supporting frame, the two ends of the fixing cylinder are fixed on the second supporting frame, and the output shaft of the first driving member is connected to the second supporting frame through a lead screw. support frame connection;

The first driving member is capable of driving the second supporting frame to move in a second direction, so that the fixing cylinder cooperates with the clamping jaw and the supporting plate to move in the second direction.

In the above technical solution, further, the first drive assembly further includes an auxiliary member, and the auxiliary member includes a slideway and a slider slidably placed on the slideway;

The slideway is arranged on the end surface of the first support frame facing the second support frame, and the slider is arranged on the end surface of the second support frame facing the first support frame.

In the above technical solution, further, the clamping mechanism further includes a limiting member;

When the clamping jaw and the support plate clamp the to-be-clamped piece, the limiting member can prevent the fixed cylinder from rotating.

In the above technical solution, further, the limiting member includes a limiting pin;

The limiting pin is arranged below the fixing cylinder, and a limiting hole is provided on the fixing cylinder at a position corresponding to the limiting pin;

When the first driving member drives the fixing cylinder to move in the second direction, the limiting pin can be inserted into or pulled out of the limiting hole.

In the above technical solution, further, the support plate is formed of spring steel.

Based on the second object, the present application provides a transfer device, comprising a second drive assembly and the above-mentioned clamping mechanism;

The output shaft of the second drive assembly is connected with the fixed cylinder, and the second drive assembly can drive the fixed cylinder to rotate by a preset angle, so that the clamping mechanism can move the to-be-clamped piece from the first The position is shifted to the second position.

In the above technical solution, further, the second driving assembly includes a second driving member;

The second driving member is arranged on the second supporting frame, and the output shaft of the second driving member passes through the second supporting frame and is inserted into the interior of the fixing cylinder;

When the second driving member drives the output shaft to rotate by the predetermined angle, the fixed cylinder rotates by the predetermined angle.

In the above technical solution, a buffer member is further included, one end of the buffer member abuts on the first support frame, and the other end abuts on the second driving member.

Compared with the prior art, the beneficial effects of the present application are:

The present application provides a clamping mechanism for clamping a to-be-clamped piece, the top end of the to-be-clamped piece has a protrusion, and the bottom end of the to-be-clamped piece has a groove; comprising a clamping claw and a support plate;

The supporting plate is located below the clamping jaws and is at a predetermined distance from the clamping jaws, so that a clamping space is formed between the clamping jaws and the supporting plate; the clamping ends of the clamping jaws A clamping groove is provided in the part; a limit protrusion is arranged on the support plate;

When the piece to be clamped is located in the clamping space, the protrusion is inserted into the clamping groove, and the limiting protrusion is clamped in the groove, the clamping mechanism can Clamp the to-be-clamped piece.

Specifically, in the actual use process, when the sample processing module (the sample processing module is the prior art, refers to a series of operations from sample pretreatment to nucleic acid purification, to PCR reaction liquid filling, etc.) Excessive elaboration, those in the art can understand) inject the PCR reaction body into the capillary, then cover the capillary holder with an end cap to seal the capillary holder, and finally transfer the sealed capillary holder to the thermal cycler module to complete Subsequent PCR process; in this embodiment, the capillary holder can be clamped by the clamping mechanism. Specifically, when the capillary holder in the kit moves to a preset position, the capillary holder is located in the clamping space. At this time, the protrusion is inserted into the clamping groove, and when the limiting protrusion is clamped in the groove, the clamping effect of the clamping groove on the protrusion and the limiting protrusion are used to clamp the protrusion. The position-limiting effect of the groove realizes the stable clamping effect of the clamping mechanism on the capillary support. It overcomes the technical problems of low work efficiency and contamination of the capillary bracket caused by manually clamping the capillary bracket in the prior art.

In summary, the use of the clamping mechanism to realize the clamping effect on the capillary rack replaces the manual operation. On the one hand, the operation is simple and the work efficiency is improved; Purity guarantees the accuracy of the results.

The application also provides a transfer device, comprising a second drive assembly and the above-mentioned clamping mechanism; an output shaft of the second drive assembly is connected to the fixed cylinder, and the second drive member can drive the fixed cylinder The predetermined angle is rotated to cause the clamping mechanism to transfer the to-be-clamped piece from the first position to the second position.

Specifically, the use of the transfer device can realize the transfer of the capillary bracket, which overcomes the manual hand-held transfer method in the prior art. On the one hand, the work efficiency is improved; The purity of the extract ensures the accuracy of the results.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. The drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of the clamping mechanism provided in the first embodiment of the application;

2 is a schematic structural diagram of the to-be-clamped member provided in the first embodiment of the application;

3 is a schematic structural diagram of the clamping mechanism provided in the fourth embodiment of the application from a first perspective;

4 is a schematic structural diagram of the clamping mechanism provided in the fourth embodiment of the application from a second viewing angle;

FIG. 5 is a schematic structural diagram of the clamping mechanism provided in the fourth embodiment of the application during practical application;

6 is a schematic structural diagram of the clamping mechanism provided in the fifth embodiment of the present application during practical application;

7 is a schematic structural diagram of the transfer device provided in Embodiment 6 of the present application from a first perspective during practical application;

FIG. 8 is a schematic structural diagram of the transfer device provided in Embodiment 6 of the present application from a second perspective during practical application;

FIG. 9 is a schematic structural diagram of the to-be-clamped member provided in the sixth embodiment of the present application.

In the figure: 100-capillary bracket; 101-protrusion; 102-groove; 103-end cover; 104-claw; 105-limiting protrusion; 106-supporting plate; 107-clamping space; 108-clamp 109-first direction; 110-first clamping jaw; 111-second clamping jaw; 112-first supporting frame; 113-second supporting frame; 115-fixing cylinder; 116-first driving member; 117 - Lead screw; 118 - Second direction; 119 - Kit; 125 - Auxiliary part; 126 - Slide way; 127 - Slider; 129 - Limit pin; Support platform.

Detailed ways

The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations on this application. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

Example 1

The present application provides a clamping mechanism, which can clamp the capillary holder 100 on the reagent kit 119 . As shown in FIG. 2 , the capillary holder 100 has a protrusion 101 at the top and a groove 102 at the bottom. 1, the clamping mechanism includes a clamping jaw 104 and a supporting plate 106; the supporting plate 106 is located below the clamping jaw 104, and is a preset distance from the clamping jaw 104 so that the A clamping space 107 is formed between the clamping jaws 104 and the support plate 106 ; further, a clamping groove 108 is formed on the clamping end of the clamping jaw 104 along its length direction, preferably, the clamping groove 108 The length is equal to the length of the protrusion 101 ; the support plate 106 is provided with a limit protrusion 105 , and the limit protrusion 105 corresponds to the position of the groove 102 .

In the actual use process, when the sample processing module (sample processing module is the prior art, refers to a series of operations from sample pretreatment to nucleic acid purification, to PCR reaction liquid filling, etc., do not do too much here. Explanation, those in the art can understand) the PCR reaction body is injected into the capillary, and then the capillary holder needs to be covered with the end cap 103 to achieve the sealing of the capillary holder 100, and finally the sealed capillary holder 100 is transferred to the thermal cycler module The subsequent PCR process is completed; in this embodiment, the capillary holder can be clamped by the clamping mechanism. In the clamping space 107, at this time, the protrusion 101 is inserted into the clamping groove 108, and when the limiting protrusion 105 is clamped in the groove 102, the clamping groove 108 is used for the protrusion 101. The clamping effect of the capillary tube holder 100 and the limiting effect of the limiting protrusion 105 on the groove 102 are realized, so as to realize the stable clamping effect of the clamping mechanism on the capillary holder 100 . The technical problem of low work efficiency and contamination of the capillary holder 100 caused by manually holding the capillary holder 100 in the prior art is overcome.

In conclusion, using the clamping mechanism to realize the clamping effect on the capillary holder 100 replaces manual operation, on the one hand, the work efficiency is improved, and on the other hand, the capillary is not polluted, and the result is more accurate.

In this embodiment, the support plate 106 is formed of spring steel, and the support plate 106 formed of spring steel material has a certain elastic force, which can generate a clamping force when the clamping jaws 104 cooperate, on the one hand, it does not affect the capillary tube The bracket 100 enters the limiting space, and on the other hand, it can ensure that the limiting protrusion 105 is clamped in the groove 102 .

Embodiment 2

The second embodiment is an improvement on the basis of the foregoing embodiment, and the technical contents disclosed in the foregoing embodiment are not described repeatedly, and the content disclosed in the foregoing embodiment also belongs to the content disclosed in the second embodiment.

Considering that a plurality of capillaries are arranged on the capillary holder 100 at intervals, that is to say, the width of the capillary holder 100 is affected by the number of capillaries. If the capillary holder 100 is too wide, in order to ensure the stable clamping of the capillary holder 100 by the clamping mechanism, a In this embodiment, the number of the clamping jaws 104 and the supporting plate 106 is provided in a plurality; the plurality of the clamping jaws 104 correspond to the plurality of the supporting plates 106 one-to-one, that is, a plurality of clamping jaws are used. 104 and the plurality of supporting plates 106 realize stable clamping of the capillary support 100 with multi-point positioning.

Specifically, a plurality of the clamping jaws 104 and the plurality of the supporting plates 106 are arranged at intervals along a first direction 109 , and the first direction 109 refers to the width extension direction of the capillary holder 100 .

Preferably, the number of the clamping jaws 104 and the supporting plate 106 is two respectively, which are the first clamping jaw 110 , the first supporting plate, the second clamping jaw 111 and the second supporting plate, respectively. The same example applies.

Embodiment 3

The third embodiment is an improvement on the basis of the above-mentioned embodiments, and the technical contents disclosed in the above-mentioned embodiments are not described repeatedly, and the contents disclosed in the above-mentioned embodiments also belong to the contents disclosed in the third embodiment.

In the actual experimental process, after the capillary holder 100 is clamped by the clamping mechanism, the capillary holder 100 needs to be covered with the end cap 103 to seal the capillary holder 100; During the capping operation of the end cap 103, the clamping mechanism holding the capillary holder 100 needs to be driven to move in the second direction 118 (moves close to the end cap 103), so as to realize the capillary capillary holder 100 cap 103 capping operation.

Based on the above problems, in this embodiment, the clamping mechanism further includes a first drive assembly, the first drive assembly includes a fixed cylinder 115, a first drive member 116 and a lead screw 117, preferably, the first drive member 116 is a first motor, the output shaft of the first motor is connected with the lead screw 117, the fixing cylinder 115 is provided with a threaded hole, the fixing cylinder 115 is sleeved on the lead screw 117, and is connected with the lead screw 117. The lead screw 117 is threadedly connected; the fixing cylinder 115 is provided with a first clamping jaw 110 and a second clamping jaw 111 at intervals along the first direction 109, and a first supporting plate and a second clamping jaw are arranged below the first clamping jaw 110. A second support plate is arranged below 111 .

Specifically, the first motor can drive the fixing cylinder 115 to move in the second direction 118 through the lead screw 117 , so that the first clamping jaw 110 and the first support plate 106 can move along the second direction 118 . The two directions 118 move, preferably, the second direction 118 refers to the vertical upward or vertical downward direction in the normal working state of the clamping mechanism.

More specifically, the end cap 103 is located on one side of the capillary holder 100, and the height of the end cap 103 is smaller than the height of the capillary holder 100. In the actual capillary 103 capping operation, the capillary holder 100 is firstly clamped by the clamping mechanism; then The first motor drives the fixing cylinder 115 to move in the vertical downward direction, so that the groove 102 at the bottom of the capillary holder 100 is inserted into the protrusion 101 at the bottom of the end cap 103 , and finally the end cap 103 of the capillary holder 100 is covered.

To sum up, by using the clamping mechanism with the first drive assembly, on the one hand, the capillary holder 100 can be clamped; set operation.

Embodiment 4

The fourth embodiment is an improvement on the basis of the above-mentioned embodiments, and the technical contents disclosed in the above-mentioned embodiments are not described repeatedly, and the contents disclosed in the above-mentioned embodiments also belong to the contents disclosed in the fourth embodiment.

Based on the problems described in the third embodiment, and considering the stable fixation of the first drive assembly, another structure of the first drive assembly is proposed in this embodiment. The first drive assembly includes a fixed cylinder 115, a first drive member 116, a first support frame 112, and a second support frame 113 disposed inside the first support frame 112. Preferably, the first drive member 116 is a first support frame 113. Motor; the first drive member 116 is disposed on the top of the first support frame 112 , the two ends of the fixing cylinder 115 are fixed on the second support frame 113 , and the output shaft of the first drive member 116 The lead screw 117 is connected to the second support frame 113, that is, when the first motor is driven, the lead screw 117 can drive the second support frame 113 to move in the second direction 118. When the second support frame 113 moves in the second direction When the 118 moves, the fixing cylinder 115 can cooperate with the clamping jaws 104 and the support plate 106 to move in the second direction 118 , thereby realizing the covering of the end cap 103 of the capillary holder 100 .

In order to ensure that the second support frame 113 can run stably on the first support frame 112, in this embodiment, the clamping mechanism further includes an auxiliary member 125, and the auxiliary member 125 includes a slideway 126 and is slidably placed on the The slider 127 on the slideway 126; the slideway 126 is arranged on the end surface of the first support frame 112 facing the second support frame 113, and the slider 127 is arranged on the second support frame 113 facing the on the end surface of the first support frame 112 .

Specifically, with the aid of the auxiliary member 125 , the second support frame 113 can not only slide stably on the first support frame 112 , but also give a certain guiding effect to the second support frame 113 .

Embodiment 5

The fifth embodiment is an improvement on the basis of the above-mentioned embodiments, and the technical contents disclosed in the above-mentioned embodiments are not described repeatedly, and the contents disclosed in the above-mentioned embodiments also belong to the contents disclosed in the fifth embodiment.

As shown in FIG. 6 , when the capillary holder 100 is clamped and the end cap 103 is capped, the fixing cylinder 115 will be subjected to a large force in the vertical direction, and once the self-locking force of the first motor is not enough to support the force, the fixed cylinder 115 will have a problem of turning and tilting. In order to overcome such problems, the clamping mechanism further includes a limiting member; when the clamping jaws 104 and the support plate 106 clamp the to-be-clamped When it is installed, the limiting member can prevent the fixed cylinder 115 from rotating.

Specifically, the limiting member is a limiting pin 129 ; the limiting pin 129 is disposed below the fixing cylinder 115 , and a limiting hole is defined on the fixing cylinder 115 at a position corresponding to the limiting pin 129 .

In actual use, when the first driving component drives the fixing cylinder 115 to move in the second direction 118 , the limiting pin 129 can be inserted into or pulled out of the limiting hole.

When the first motor drives the fixing cylinder 115 to move down a certain distance along the second direction 118, the limit pin 129 can be rotated into the limiting hole, and the fixing cylinder 115 is limited at this time; when the clamping jaw 104 grabs the capillary holder 100 and After the capping action of the end cap 103 is completed, when moving upward along the second direction 118 , the limiting pin 129 leaves the limiting hole.

Embodiment 6

7-9, when the capillary holder 100 is capped with the end cap 103, the capillary holder 100 needs to be transferred to the PCR thermal cycling module (the PCR thermal cycling module is the core technology for rapid molecular detection), In order to realize the thermal cycle of the capillary holder 100, in order to facilitate the transfer of the capillary holder 100 to the PCR thermal cycle module, the present application also provides a transfer device, comprising a second drive assembly and the above-mentioned clamping mechanism; the second drive The output shaft of the assembly is connected with the fixed cylinder 115, and the second driving member 131 can drive the fixed cylinder 115 to rotate by a preset angle so that the clamping mechanism transfers the to-be-clamped member from the first position to the second position.

In conclusion, using the transfer device can realize the transfer of the capillary stent 100 , which overcomes the manual hand-held transfer method in the prior art. On the one hand, the work efficiency is improved; on the other hand, the capillary stent 100 is not polluted.

Considering that the fixed cylinder 115 is fixed on the second support frame 113 and the space on the upper part of the fixed cylinder 115 is limited, preferably, the fixed cylinder 115 rotates counterclockwise during the rotation process, that is, the second driving member 131 drives the fixed cylinder 115 rotates counterclockwise.

Specifically, the first position refers to the position where the capillary holder 100 in the reagent kit 119 is located on one side of the second support frame 113 , and the second position refers to the position on the other side of the second support frame 113 . The position of the supporting portion for supporting the capillary holder 100 .

Preferably, the preset angle is 180°.

In this embodiment, the second driving assembly includes a second driving member 131; the second driving member 131 is disposed on the second supporting frame 113, and the output shaft of the second driving member 131 passes through the second driving member 131. The second supporting frame 113 is inserted into the interior of the fixing cylinder 115; preferably, the second driving member 131 is a second motor.

Specifically, when the second motor drives the output shaft to rotate by the predetermined angle, the fixed cylinder 115 can be rotated by the predetermined angle.

Considering that when the second motor works, it will generate vibration, in order to prevent this vibration from being transmitted to the capillary holder 100 and affecting the capillary holder 100, in this embodiment, the transfer member further includes a buffer 132, the One end of the buffer member 132 is abutted on the first support frame 112, and the other end is abutted on the second driving member 131; preferably, the buffer member 132 is a spring, which is used for shock absorption effect.

Besides, the present application is also provided with a support platform 133 , and the clamping mechanism is provided on the support platform 133 .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. scope. Furthermore, those skilled in the art will appreciate that although some of the embodiments herein include certain features, but not others, included in other embodiments, that combinations of features of different embodiments are intended to be within the scope of this application And form different embodiments.

Claims (12)

1. A clamping mechanism, characterized in that, the clamping mechanism is used for clamping a capillary support, the top of the capillary support has a protrusion extending along the width direction of the capillary support, and the bottom end has a protrusion along the width direction of the capillary support. a groove extending in the length direction of the capillary bracket; the clamping mechanism includes a clamping claw and a supporting plate; The supporting plate is located below the clamping jaws and is at a predetermined distance from the clamping jaws, so that a clamping space is formed between the clamping jaws and the supporting plate; The clamping ends of the clamping jaws are provided with clamping grooves extending along the length direction of the clamping jaws; the support plate is provided with limit protrusions extending along the width direction of the support plate, so The extension direction of the clamping groove forms an angle with the extension direction of the limiting protrusion; When the capillary holder is located in the clamping space and the protrusion can be inserted into the clamping groove, the limiting protrusion can be clamped in the groove. 2 . The clamping mechanism according to claim 1 , wherein the number of the clamping jaws and the supporting plate is multiple; 2 . A plurality of the clamping claws are arranged at intervals along the first direction, a plurality of the supporting plates are arranged at intervals along the first direction, and a plurality of the clamping claws are arranged in a one-to-one correspondence with the plurality of the supporting plates . 3 . The clamping mechanism according to claim 2 , wherein the number of the clamping claws and the supporting plate is two respectively. 4 . 4 . The clamping mechanism according to claim 1 , wherein the clamping mechanism further comprises a first drive assembly, the first drive assembly including a fixed cylinder, a first drive member and a lead screw; 5 . The output shaft of the first driving member is connected with the lead screw, and the lead screw is in driving connection with the fixed cylinder; The first driving member can drive the fixing cylinder to move in the second direction through the lead screw, so as to make the clamping jaw and the support plate move in the second direction. 5 . The clamping mechanism according to claim 4 , wherein the clamping mechanism further comprises a first support frame and a second support frame disposed inside the first support frame; 5 . The first driving member is arranged on the first supporting frame, the two ends of the fixing cylinder are fixed on the second supporting frame, and the output shaft of the first driving member is connected to the second supporting frame through a lead screw. support frame connection; The first driving member is capable of driving the second supporting frame to move in a second direction, so that the fixing cylinder cooperates with the clamping jaw and the supporting plate to move in the second direction. 6 . The clamping mechanism according to claim 5 , wherein the first driving assembly further comprises an auxiliary member, and the auxiliary member comprises a slideway and a slider slidably placed on the slideway; 6 . The slideway is arranged on the end surface of the first support frame facing the second support frame, and the slider is arranged on the end surface of the second support frame facing the first support frame. 7. The clamping mechanism according to claim 6, wherein the clamping mechanism further comprises a limiting member; When the clamping jaw and the support plate clamp the capillary holder, the limiting member can prevent the fixed cylinder from rotating. 8. The clamping mechanism according to claim 7, wherein the limiting member comprises a limiting pin; The limiting pin is arranged below the fixing cylinder, and a limiting hole is defined on the fixing cylinder at a position corresponding to the limiting pin; When the first driving member drives the fixing cylinder to move in the second direction, the limiting pin can be inserted into or pulled out of the limiting hole. 9. The clamping mechanism of claim 1, wherein the support plate is formed of spring steel. 10. A transfer device, characterized in that it comprises a second drive assembly and the clamping mechanism according to any one of claims 5-8; The output shaft of the second drive assembly is connected with the fixed cylinder, and the second drive assembly can drive the fixed cylinder to rotate by a preset angle, so that the clamping mechanism transfers the to-be-clamped piece from the first position to the second position. 11. The transfer device of claim 10, wherein the second drive assembly comprises a second drive member; The second driving member is arranged on the second supporting frame, and the output shaft of the second driving member passes through the second supporting frame and is inserted into the interior of the fixing cylinder; When the second driving member drives the output shaft to rotate by the predetermined angle, the fixed cylinder rotates by the predetermined angle. 12. The transfer device according to claim 11, further comprising a buffer member, one end of the buffer member abuts on the first support frame, and the other end abuts on the second driving member superior.

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