Clamping mechanism and sample detection system

Abstract

The utility model discloses a clamping mechanism and a sample detection system. The clamping mechanism comprises a base. The rotating mechanism is rotationally arranged on the base; the driving part is used for driving the rotating mechanism to rotate; the middle part of the first clamping arm is rotationally arranged on the base; the middle of the second clamping arm is rotationally arranged on the base, the second clamping arm and the first clamping arm are oppositely arranged and located on the two sides of the rotating mechanism respectively, and a clamping space capable of containing a part to be clamped is formed between the first end of the first clamping arm and the first end of the second clamping arm; one of the first clamping arm and the second clamping arm rotates in the same direction as the rotating mechanism, and the other one rotates in the direction opposite to the rotating mechanism. According to the clamping mechanism, the closer to the tail end of the first end of the first clamping arm and the tail end of the first end of the second clamping arm, the larger the clamping force of the clamping mechanism is, the better the clamping effect on the to-be-clamped piece is, and the problem that the reliability is low due to the fact that the tail end clamping force is too small or clamping force is not enough is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping mechanisms, in particular to a clamping mechanism and a sample detection system. Background Art

[0002] In a sample detection system, a clamping mechanism is usually used to clamp the detection plate and then transfer the detection plate. The existing clamping mechanism often has a phenomenon that the clamping force at the clamping end is too small or the clamping force is weak, which reduces the reliability of the clamping mechanism.

[0003] Therefore, how to improve the reliability of the clamping mechanism is a technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0004] In view of this, an object of the present invention is to provide a clamping mechanism to improve the reliability of the clamping mechanism.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A clamping mechanism, comprising:

[0007] Pedestal;

[0008] A rotating mechanism, rotatably disposed on the base;

[0009] A driving member, used for driving the rotating mechanism to rotate;

[0010] A first clamping arm, wherein a middle portion of the first clamping arm is rotatably disposed on the base;

[0011] a second clamping arm, wherein the middle portion of the second clamping arm is rotatably disposed on the base, the second clamping arm and the first clamping arm are disposed opposite to each other and are respectively located on both sides of the rotating mechanism, and a clamping space capable of accommodating a member to be clamped is formed between the first end of the first clamping arm and the first end of the second clamping arm;

[0012] Wherein, one of the first clamping arm and the second clamping arm rotates in the same direction as the rotating mechanism, and the other rotates in the opposite direction to the rotating mechanism.

[0013] Optionally, in the above clamping mechanism, the rotating mechanism comprises:

[0014] Transmission gear;

[0015] A first slide rail, disposed on the base;

[0016] A second slide rail is arranged on the base in parallel with the first slide rail, and the first slide rail and the second slide rail are symmetrically arranged on opposite sides of the transmission gear;

[0017] A first toothed member is slidably disposed on the first slide rail, the first toothed member is meshed with the transmission gear, and an end of the first toothed member is rotatably connected to the first clamping arm;

[0018] The second toothed member is slidably disposed on the second slide rail, and the second toothed member is meshed with the transmission gear, and the end of the second toothed member is rotatably connected to the second clamping arm.

[0019] Optionally, in the above clamping mechanism, the rotating mechanism comprises:

[0020] A rotating member body, rotatably disposed on the base;

[0021] A first connecting rod, two ends of which are rotatably connected to the second end of the first clamping arm and the rotating member body respectively;

[0022] A second connecting rod, two ends of which are rotatably connected to the second end of the second clamping arm and the rotating member body respectively.

[0023] Optionally, in the above-mentioned clamping mechanism, the rotating mechanism includes a conjugate cam, the conjugate cam includes a conjugate rotating shaft, a first cam and a second cam, the first cam and the second cam are coaxially arranged on the conjugate rotating shaft, the long axis portion of the first cam and the long axis portion of the second cam are symmetrically arranged on both sides of the conjugate rotating shaft, and the long axis portion of the first cam is rotationally connected to the first clamping arm, and the long axis portion of the second cam is rotationally connected to the second clamping arm.

[0024] Optionally, in the above clamping mechanism, the rotating mechanism includes a crank shaft, a first crank, a second crank, a first connecting rod and a second connecting rod;

[0025] Among them, the first end of the first crank and the first end of the second crank are both fixedly connected to the crank shaft, the axis of the first crank and the axis of the second crank are both arranged along the radial direction of the shaft and the angle between the axis of the first crank and the axis of the second crank is 180°, the first connecting rod is rotationally connected to the second end of the first crank and the second end of the first clamping arm, and the second connecting rod is rotationally connected to the second end of the second crank and the second end of the second clamping arm.

[0026] Optionally, in the above-mentioned clamping mechanism, a side of the first clamping arm close to the clamping space and a side of the second clamping arm close to the clamping space are both provided with a limiting support portion, and the limiting support portion extends from the lower edge of the first clamping arm and the lower edge of the second clamping arm into the interior of the clamping space.

[0027] Optionally, in the above clamping mechanism, an anti-slip portion is provided on an inner wall of the first end of the first clamping arm and an inner wall of the first end of the second clamping arm.

[0028] Optionally, in the above clamping mechanism, the clamping mechanism further comprises:

[0029] A moving assembly, used for driving the base to move along a preset trajectory;

[0030] A micro switch is arranged on a side of the base close to the clamping space;

[0031] The central controller is connected to the moving assembly, the micro switch and the rotating mechanism by signal.

[0032] Optionally, in the above clamping mechanism, the clamping mechanism further comprises a photoelectric switch arranged on a base for detecting whether the clamping mechanism is located at a preset origin position in the sample detection system, and the photoelectric switch is connected to the central controller signal.

[0033] A sample detection system comprises a detection plate and the clamping mechanism as described above, wherein the detection plate is provided with a plurality of placement holes for placing reagent specimens.

[0034] When the clamping mechanism provided by the utility model is used, the rotating mechanism is driven to rotate on the base by the driving member, and one of the first clamping arm and the second clamping arm rotates in the same direction as the rotating mechanism, and the other rotates in the opposite direction to the rotating mechanism. Therefore, the first clamping arm and the second clamping arm rotate in the opposite directions, so that the first end of the first clamping arm and the first end of the second clamping arm are close to or away from each other, that is, the opening and closing of the clamping mechanism is realized. For example, when the rotating mechanism rotates in a clockwise direction, the first clamping arm rotates in a clockwise direction, and the second clamping arm rotates in a counterclockwise direction, thereby making the first end of the first clamping arm and the first end of the second clamping arm close to each other, that is, the clamping action of the clamping mechanism is realized; when the rotating mechanism rotates in a counterclockwise direction, the first clamping arm rotates in a counterclockwise direction, and the second clamping arm rotates in a clockwise direction, thereby making the first end of the first clamping arm and the first end of the second clamping arm move away from each other, that is, the opening action of the clamping mechanism is realized.

[0035] It can be seen that in the clamping mechanism provided by the utility model, the first clamping arm and the second clamping arm are relatively and rotatably arranged on the base. Therefore, after the part to be clamped is placed in the clamping space between the first end of the first clamping arm and the first end of the second clamping arm, the first clamping arm and the second clamping arm are driven by the rotating mechanism to rotate in opposite directions to achieve clamping of the part to be clamped. Based on the principle of lever, the closer to the first end of the first clamping arm and the first end of the second clamping arm, the greater the clamping force of the clamping mechanism is, and the better the clamping effect of the part to be clamped is, which reduces the problem of low reliability caused by too small clamping force or weak clamping at the clamping end in the prior art, and is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the structure of a clamping mechanism provided by an embodiment of the utility model;

[0038] Figure 2 A schematic diagram of an exploded structure of another clamping mechanism provided by an embodiment of the utility model;

[0039] Figure 3 A schematic diagram of the assembly structure of another clamping mechanism provided in an embodiment of the utility model.

[0040] Among them, 100 is a base, 200 is a rotating mechanism, 201 is a transmission gear, 202 is a first toothed part, 203 is a second toothed part, 204 is a rotating part body, 205 is a first connecting rod, 206 is a second connecting rod, 300 is a driving part, 400 is a first clamping arm, 401 is a limiting support part, 500 is a second clamping arm, 600 is a micro switch, 700 is a photoelectric switch, and 800 is a part to be clamped. DETAILED DESCRIPTION

[0041] In view of this, the core of the present invention is to provide a clamping mechanism to improve the reliability of the clamping mechanism.

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] like Figures 1 to 3 As shown, the embodiment of the utility model discloses a clamping mechanism, which includes a base 100 , a rotating mechanism 200 , a driving member 300 , a first clamping arm 400 and a second clamping arm 500 .

[0044] Among them, the rotating mechanism 200 is rotatably arranged on the base 100; the driving member 300 is used to drive the rotating mechanism 200 to rotate; the middle part of the first clamping arm 400 is rotatably arranged on the base 100; the middle part of the second clamping arm 500 is rotatably arranged on the base 100, the second clamping arm 500 and the first clamping arm 400 are arranged opposite to each other and are respectively located on both sides of the rotating mechanism 200, and a clamping space capable of accommodating the clamped member 800 is formed between the first end of the first clamping arm 400 and the first end of the second clamping arm 500; one of the first clamping arm 400 and the second clamping arm 500 rotates in the same direction as the rotating mechanism 200, and the other rotates in the opposite direction to the rotating mechanism 200.

[0045] When the clamping mechanism provided by the utility model is used, the driving member 300 drives the rotating mechanism 200 to rotate on the base 100. Based on the fact that one of the first clamping arm 400 and the second clamping arm 500 rotates in the same direction as the rotating mechanism 200, and the other rotates in the opposite direction to the rotating mechanism 200, the first clamping arm 400 and the second clamping arm 500 rotate in the opposite direction, so that the first end of the first clamping arm 400 and the first end of the second clamping arm 500 are moved closer to or away from each other, that is, the opening and closing of the clamping mechanism is realized. For example, when the rotating mechanism 200 rotates in the clockwise direction, When the rotating mechanism 200 moves, the first clamping arm 400 rotates in the clockwise direction and the second clamping arm 500 rotates in the counterclockwise direction, thereby making the first end of the first clamping arm 400 and the first end of the second clamping arm 500 approach each other, that is, realizing the clamping action of the clamping mechanism; when the rotating mechanism 200 rotates in the counterclockwise direction, the first clamping arm 400 rotates in the counterclockwise direction and the second clamping arm 500 rotates in the clockwise direction, thereby making the first end of the first clamping arm 400 and the first end of the second clamping arm 500 move away from each other, that is, realizing the opening action of the clamping mechanism.

[0046] It can be seen that in the clamping mechanism provided by the utility model, the first clamping arm 400 and the second clamping arm 500 are relatively and rotatably arranged on the base 100. Therefore, after the part 800 to be clamped is placed in the clamping space between the first end of the first clamping arm 400 and the first end of the second clamping arm 500, the first clamping arm 400 and the second clamping arm 500 are driven by the rotating mechanism 200 to rotate in opposite directions to achieve clamping of the part 800 to be clamped. Based on the principle of lever, the closer to the first end of the first clamping arm 400 and the first end of the second clamping arm 500, the greater the clamping force of the clamping mechanism, and the better the clamping effect of the part 800 to be clamped, thereby reducing the problem of low reliability caused by too small clamping force or weak clamping at the clamping end in the prior art, and is suitable for promotion and application.

[0047] It should be noted that the first end of the first clamping arm 400 and the first end of the second clamping arm 500 are designed to conform to the outer wall of the part to be clamped 800, so that the first end of the first clamping arm 400 and the first end of the second clamping arm 500 have a larger contact area with the part to be clamped 800, thereby improving the clamping effect; for example, when the part to be clamped 800 is a detection plate, the first end of the first clamping arm 400 and the first end of the second clamping arm 500 are designed to be in a flat form that fits with the two side walls of the detection plate; when the part to be clamped 800 is a tubular part, the first end of the first clamping arm 400 and the first end of the second clamping arm 500 are designed to be in an arcuate form that fits with the two side walls of the detection plate.

[0048] In addition, the first end and the second end of the above-mentioned first clamping arm 400 are two opposite ends of the first clamping arm 400, and the “middle part of the first clamping arm 400” and the middle part of the first clamping arm 400 refer to any position between the first end of the first clamping arm 400 and the second end of the first clamping arm 400; similarly, the first end and the second end of the above-mentioned second clamping arm 500 are two opposite ends of the second clamping arm 500, and the “middle part of the second clamping arm 500” refers to any position between the first end of the second clamping arm 500 and the second end of the first clamping arm 400.

[0049] The present invention does not specifically limit the type of the above-mentioned rotating mechanism 200. As long as the rotating mechanism 200 can meet the use requirements, it belongs to the protection scope of the present invention.

[0050] Optionally, in a specific embodiment of the utility model, the rotating mechanism 200 includes a transmission gear 201, a first toothed member 202, a second toothed member 203, a first slide rail and a second slide rail; wherein the first slide rail and the second slide rail are arranged in parallel on the base and symmetrically on two opposite sides of the transmission gear 201, the first toothed member 202 and the second toothed member 203 are slidably arranged on the first slide rail and the second slide rail respectively, and the first toothed member 202 is meshed with the transmission gear 201, and the end of the first toothed member 202 is rotatably connected to the first clamping arm 400, and the first slide rail and the second slide rail are rotatably connected to the first clamping arm 400. The second toothed member 203 is meshed with the transmission gear 201, and the end of the second toothed member 203 is rotatably connected to the second clamping arm 500, so that the transmission gear 201 can be driven to rotate through the driving member 300, and the first toothed member 202 and the second toothed member 203 are driven to slide in opposite directions through the transmission gear 201, thereby driving the first clamping arm 400 and the second clamping arm 500 to switch between an opening action and a clamping action. The first clamping arm 400 and the second clamping arm 500 are in a clamping state that is just flush with the clamped member 800, and the tighter the end is, the tighter it is.

[0051] In order to further reduce the cost and reduce the problem of reduced transmission stability caused by the slippage of the toothed member and the transmission gear 201 during the transmission process, in some other specific embodiments of the present invention, the rotating mechanism 200 includes a rotating member body 204, a first connecting rod 205 and a second connecting rod 206; wherein the rotating member body 204 is rotatably arranged on the base 100, and the two ends of the first connecting rod 205 are rotatably connected to the second end of the first clamping arm 400 and the rotating member body 204, respectively, and the two ends of the second connecting rod 206 are rotatably connected to the second end of the second clamping arm 500 and the rotating member body 204, so as to The driving member 300 drives the rotating member body 204 to rotate. Based on the connection relationship between the rotating member body 204 and the first connecting rod 205 and the second connecting rod 206, the rotating member body 204 drives the first connecting rod 205 and the second connecting rod 206 to rotate in the opposite direction. The first connecting rod 205 drives the first clamping arm 400 to rotate, and the second connecting rod 206 drives the second clamping arm 500 to rotate in the opposite direction, so that the first clamping arm 400 and the second clamping arm 500 switch between the opening action and the clamping action. The first clamping arm 400 and the second clamping arm 500 are in a clamping state that is just flush with the clamped member 800 in the clamping state, and the tighter the end is, the tighter it is.

[0052] Furthermore, in some other specific embodiments of the present invention, the rotating mechanism 200 includes a conjugate cam, the conjugate cam includes a conjugate rotating shaft, a first cam and a second cam, the first cam and the second cam are coaxially arranged on the conjugate rotating shaft, the long axis portion of the first cam and the long axis portion of the second cam are symmetrically arranged on both sides of the conjugate rotating shaft, and the long axis portion of the first cam is rotatably connected to the first clamping arm 400, and the long axis portion of the second cam is rotatably connected to the second clamping arm 500, so as to drive the conjugate rotating shaft to rotate through the driving member 300. Based on the fact that the first cam and the second cam are coaxially arranged on the conjugate rotating shaft, Here, the first cam and the second cam rotate together with the conjugate shaft. When the conjugate shaft rotates until the long axis portion of the first cam is perpendicular or nearly perpendicular to the first clamping arm 400, the long axis portion of the second cam is also perpendicular or nearly perpendicular to the second clamping arm 500, thereby maximizing the distance between the second end of the first clamping arm 400 and the second end of the second clamping arm 500. At this time, the distance between the first end of the first clamping arm 400 and the first end of the second clamping arm 500 is minimized, thereby enabling the first end of the first clamping arm 400 and the first end of the second clamping arm 500 to clamp the part 800 to be clamped.

[0053] Alternatively, in some other specific embodiments of the present invention, the rotating mechanism 200 achieves clamping of the clamping member 800 through a double crank-connecting rod mechanism; specifically, the rotating mechanism 200 includes a crank shaft, a first crank, a second crank, a first connecting rod and a second connecting rod; the first end of the first crank and the first end of the second crank are fixedly connected to the crank shaft, the axis of the first crank and the axis of the second crank are both arranged along the radial direction of the shaft and the angle between the axis of the first crank and the axis of the second crank is 180°, and the first connecting rod rotatably connects the second end of the first crank and the first clamping arm 400 The second end of the second connecting rod is rotatably connected to the second end of the second crank and the second end of the second clamping arm 500, so that the crank shaft is driven to rotate through the driving member 300, and the crank shaft drives the first crank and the second crank to rotate around the axis of the crank shaft, thereby making the end of the first connecting rod connected to the first crank and the end of the second connecting rod connected to the second crank approach or move away from each other, so that the distance between the second end of the first clamping arm 400 and the second end of the second clamping arm 500 becomes larger or smaller, thereby making the first end of the first clamping arm 400 and the first end of the second clamping arm 500 open or clamped.

[0054] Furthermore, a side of the first clamping arm 400 close to the clamping space and a side of the second clamping arm 500 close to the clamping space are both provided with a limiting support portion 401, and the limiting support portion 401 is formed to extend from the lower edge of the first clamping arm 400 and the lower edge of the second clamping arm 500 toward the inside of the clamping space, so as to provide limiting support for the lower edge of the clamping piece 800 through the limiting support portion 401, thereby preventing the clamping piece 800 from falling due to its own large gravity or small clamping force during the process of transferring the clamping piece 800, thereby improving the reliability and stability of the clamping mechanism.

[0055] It should be understood that the above-mentioned limit support part 401 can be a support plate or support platform type structure integrally formed with the first clamping arm 400 or the second clamping arm 500, or it can be a support structure additionally arranged on the first clamping arm 400 and the second clamping arm 500, and the above-mentioned limit support part 401 can be a fixed-size structure or a telescopic structure. As long as the structural form can meet the use requirements, it belongs to the protection scope of the present utility model.

[0056] In addition, the first end inner wall of the first clamping arm 400 and the first end inner wall of the second clamping arm 500 are both provided with anti-slip parts to increase the friction between the clamped part 800 and the first clamping arm 400 and the second clamping arm 500 through the anti-slip parts, thereby improving the clamping stability of the clamping mechanism.

[0057] The anti-skid portion may be a hemispherical protrusion or an anti-skid pattern, etc. As long as the structure can play an anti-skid role, it belongs to the protection scope of the present utility model.

[0058] like Figure 2 and Figure 3 As shown, the clamping mechanism further includes a moving component, a micro switch 600 and a central controller, wherein the moving component is used to drive the base 100 to move along a preset trajectory, the micro switch 600 is arranged on a side of the base 100 close to the clamping space, and the central controller is connected to the moving component, the micro switch 600 and the rotating mechanism 200 by signal, so that when it is necessary to clamp the part 800 to be clamped, the moving component is controlled by the central controller to move in a direction close to the part 800 to be clamped. When the micro switch 600 touches the part 800 to be clamped, the micro switch 600 sends a signal to the central controller, and the central controller controls the moving component to stop moving and sends a signal to the rotating mechanism 200 at the same time. The rotating mechanism 200 rotates in a clockwise direction according to the command issued by the central controller, and the first clamping arm 400 and the second clamping arm 500 respectively rotate in opposite directions around their respective axes, so that the distance between the first end of the first clamping arm 400 and the first end of the second clamping arm 500 is reduced, and the part 800 to be clamped is clamped.

[0059] The clamping mechanism provided by the present invention also includes a photoelectric switch 700 arranged on the base 100, and the photoelectric switch 700 is connected to the central controller signal so that the photoelectric switch 700 can detect whether the clamping mechanism is located at a preset origin position in the sample detection system, so that the central controller can judge whether the clamping mechanism is reset in the detection system.

[0060] In addition, the utility model also discloses a sample detection system, including a detection plate and the clamping mechanism as described above, wherein a plurality of placement holes are provided on the detection plate to facilitate placing reagent specimens in the placement holes, and the detection plate is clamped by the clamping mechanism and then moved to realize the transfer of the reagent specimens.

[0061] It should be understood that the above-mentioned clamping mechanism can be used for but not limited to sample detection systems, and can also be used in technical fields such as logistics sorting systems or beverage filling. Therefore, the present invention does not specifically limit the application field of the clamping mechanism.

[0062] The terms "first" and "second" in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.

[0063] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clamping mechanism, characterized in that: include: Pedestal; A rotating mechanism, rotatably disposed on the base; A driving member, used for driving the rotating mechanism to rotate; A first clamping arm, wherein a middle portion of the first clamping arm is rotatably disposed on the base; a second clamping arm, wherein the middle portion of the second clamping arm is rotatably disposed on the base, the second clamping arm and the first clamping arm are disposed opposite to each other and are respectively located on both sides of the rotating mechanism, and a clamping space capable of accommodating a member to be clamped is formed between the first end of the first clamping arm and the first end of the second clamping arm; Wherein, one of the first clamping arm and the second clamping arm rotates in the same direction as the rotating mechanism, and the other rotates in the opposite direction to the rotating mechanism.

2. The clamping mechanism according to claim 1, characterized in that: The rotating mechanism comprises: Transmission gear; A first slide rail, disposed on the base; A second slide rail is arranged on the base in parallel with the first slide rail, and the first slide rail and the second slide rail are symmetrically arranged on opposite sides of the transmission gear; A first toothed member is slidably disposed on the first slide rail, the first toothed member is meshed with the transmission gear, and an end of the first toothed member is rotatably connected to the first clamping arm; The second toothed member is slidably disposed on the second slide rail, and the second toothed member is meshed with the transmission gear, and the end of the second toothed member is rotatably connected to the second clamping arm.

3. The clamping mechanism according to claim 1, characterized in that: The rotating mechanism comprises: A rotating member body, rotatably disposed on the base; A first connecting rod, two ends of which are rotatably connected to the second end of the first clamping arm and the rotating member body respectively; A second connecting rod, two ends of which are rotatably connected to the second end of the second clamping arm and the rotating member body respectively.

4. The clamping mechanism according to claim 1, characterized in that: The rotating mechanism includes a conjugate cam, and the conjugate cam includes a conjugate rotating shaft, a first cam and a second cam, the first cam and the second cam are coaxially arranged on the conjugate rotating shaft, the long axis portion of the first cam and the long axis portion of the second cam are symmetrically arranged on both sides of the conjugate rotating shaft, and the long axis portion of the first cam is rotationally connected to the first clamping arm, and the long axis portion of the second cam is rotationally connected to the second clamping arm.

5. The clamping mechanism according to claim 1, characterized in that: The rotating mechanism comprises a crank shaft, a first crank, a second crank, a first connecting rod and a second connecting rod; Among them, the first end of the first crank and the first end of the second crank are both fixedly connected to the crank shaft, the axis of the first crank and the axis of the second crank are both arranged along the radial direction of the shaft and the angle between the axis of the first crank and the axis of the second crank is 180°, the first connecting rod is rotationally connected to the second end of the first crank and the second end of the first clamping arm, and the second connecting rod is rotationally connected to the second end of the second crank and the second end of the second clamping arm.

6. The clamping mechanism according to claim 1, characterized in that: A side of the first clamping arm close to the clamping space and a side of the second clamping arm close to the clamping space are both provided with a limiting support portion, and the limiting support portion is formed by extending from the lower edge of the first clamping arm and the lower edge of the second clamping arm into the clamping space.

7. The clamping mechanism according to claim 1, characterized in that: An anti-slip portion is disposed on the inner wall of the first end of the first clamping arm and the inner wall of the first end of the second clamping arm.

8. The clamping mechanism according to claim 1, characterized in that: The clamping mechanism also includes: A moving assembly, used for driving the base to move along a preset trajectory; A micro switch is arranged on a side of the base close to the clamping space; The central controller is connected to the moving assembly, the micro switch and the rotating mechanism by signal.

9. The clamping mechanism according to claim 8, characterized in that: The clamping mechanism further comprises a photoelectric switch arranged on the base, which is used to detect whether the clamping mechanism is located at a preset origin position in the sample detection system, and the photoelectric switch is connected to the central controller by signal.

10. A sample detection system, characterized in that: It comprises a detection plate and a clamping mechanism as claimed in any one of claims 1 to 9, wherein the detection plate is provided with a plurality of placement holes for placing reagent specimens.

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