Rotary liquid injection mechanism and automatic analysis system using same

Abstract

The utility model relates to the technical field of medical instruments, in particular to a rotary liquid injection mechanism and an automatic analysis system applying the same. The rotary liquid injection mechanism comprises a shaft sleeve for sleeving the reaction container, and a first clamping position is arranged at the top of the shaft sleeve; the liquid injection assembly is located above the shaft sleeve and comprises a liquid injection needle set communicated with the liquid path device and a liquid injection needle sleeve arranged on the periphery of the liquid injection needle set in a sleeving mode, a rotating piece capable of covering the top of the shaft sleeve is arranged at the bottom of the liquid injection needle sleeve, and a first clamping part used for being clamped with the first clamping position is arranged at the bottom of the rotating piece; the rotating assembly is in driving connection with the shaft sleeve to drive the shaft sleeve to rotate. The rotary liquid injection mechanism and the automatic analysis system applying the rotary liquid injection mechanism solve the technical problems that liquid splashing is caused by rotary liquid injection, cross contamination is prevented, and the detection analysis result is affected.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a rotary liquid injection mechanism and an automatic analysis system using the same. Background Art

[0002] In the field of immunoassay, existing technologies for in vitro diagnosis based on immune principles are constantly developing, and the demand for automation and intelligence of "sample in, result out" is getting higher and higher. Currently, most of the fully automatic chemiluminescence immunoassays and multiplex liquid chip immunoassays on the market can realize functions such as automatic sampling, on-demand incubation, automatic separation of analytes, and automatic analysis of test results.

[0003] However, in this process, the injection needle needs to be frequently used to add liquid, for example, the cleaning liquid is added through the injection needle to clean the reaction tube. To achieve a better cleaning effect, methods such as increasing the injection speed, adjusting the injection angle, rotating the reaction tube, etc. can be used. However, increasing the injection speed or rotating the reaction tube may cause the liquid in the reaction tube to splash, thereby causing contamination and affecting the detection and analysis results. Utility Model Content

[0004] The purpose of the present application is to provide a rotary liquid injection mechanism and an automatic analysis system using the same, so as to solve the technical problems of liquid splashing caused by rotary liquid injection, prevent cross contamination, and affect the detection and analysis results.

[0005] In a first aspect, the present application provides a rotary liquid injection mechanism, comprising:

[0006] A shaft sleeve for sleeve-mounting a reaction container, wherein the top of the shaft sleeve is provided with a first clamping position;

[0007] An injection assembly is located above the shaft sleeve, the injection assembly includes an injection needle group connected to the liquid path device and an injection needle sleeve sleeved on the outer periphery of the injection needle group, the bottom of the injection needle sleeve is provided with a rotating member capable of covering the top of the shaft sleeve, and the bottom of the rotating member is provided with a first engaging portion for engaging with the first engaging position;

[0008] A rotating assembly is drivingly connected to the shaft sleeve to drive the shaft sleeve to rotate.

[0009] Furthermore, the rotary injection mechanism further comprises:

[0010] A liquid injection support plate fixedly supporting the liquid injection assembly, and a liquid injection lifting mechanism driving the liquid injection support plate to lift;

[0011] The injection lifting mechanism can drive the injection support plate to drive the injection assembly to descend until the rotating part of the injection needle sleeve covers the top of the sleeve, and at the same time, the first clamping part is clamped and abutted against the first clamping position, and at the same time, the injection needle group enters the reaction container in the sleeve.

[0012] Furthermore, the injection needle sleeve includes a guide sleeve fixedly connected to the injection support plate, a bearing fixing sleeve longitudinally slidably connected to the outer periphery of the guide sleeve, and the rotating member rotatably connected to the bottom of the bearing fixing sleeve; the injection needle group sequentially passes through the interior of the guide sleeve and the bearing fixing sleeve and passes through the rotating member, and is fixedly connected to the guide sleeve; a first elastic member is abutted between the top of the rotating member and the bottom of the guide sleeve.

[0013] Furthermore, a fixed sleeve is fixedly mounted on the outer wall of the injection needle assembly, and the fixed sleeve is fixedly connected to the inner wall of the guide sleeve;

[0014] The bottom of the guide sleeve is provided with a movable block slidably connected to its inner wall, and a compression spring is abutted between the top of the movable block and the top of the guide sleeve, and the compression spring is sleeved outside the fixed shaft sleeve; the opposite ends of the first elastic member are respectively abutted against the bottom of the movable block and the top of the rotating member.

[0015] Furthermore, a first longitudinal slot is provided on the outer periphery of the bearing fixing sleeve, and a first stopper capable of moving longitudinally in the first longitudinal slot is provided on the outer periphery of the guide sleeve; and / or

[0016] A second longitudinal sliding groove is disposed on the outer periphery of the guide sleeve, and a first sliding block is disposed on the outer periphery of the movable block and is slidably connected to the second longitudinal sliding groove.

[0017] Furthermore, the rotating member includes a connecting portion rotatably connected to the bottom inner wall of the bearing fixing sleeve, and an enlarged portion located downstream of the connecting portion, the bottom of the enlarged portion is provided with the first clamping portion, and the cross-section of the enlarged portion is gradually enlarged from the top where it is connected to the connecting portion to the bottom thereof.

[0018] Furthermore, the first engaging position is configured as a concave surface and a convex surface that are alternately and continuously arranged along the circumference of the sleeve, and the first engaging portion is configured as at least two protrusions that are arranged along the bottom circumference of the expansion portion and can be engaged with the concave surface.

[0019] Furthermore, the injection needle set includes a first needle and a second needle extending longitudinally, the first needle and the second needle are respectively provided with a first through hole and a second through hole, and the first through hole and the second through hole are arranged opposite to each other; and / or

[0020] The rotating assembly includes a first rotating motor, a rotating transmission member drivingly connected to the first rotating motor, and a rotating drive member drivingly connected to the rotating transmission member, the rotating drive member is drivingly connected to the bushing; a hole sleeve is provided on the inner wall of the bushing, and the rotating drive member is an axle pin that can be inserted into the hole sleeve.

[0021] In a second aspect, the present application provides an automatic analysis system, comprising any one of the aforementioned rotary liquid injection mechanisms, and a reaction tube tray and a reaction tube tray driving mechanism for driving the reaction tube tray to rotate and lift;

[0022] A plurality of rotatable shaft sleeves are fixedly connected to the reaction tube disk;

[0023] The reaction tube disk driving mechanism can drive the reaction tube disk to rotate to the bottom of the liquid injection assembly.

[0024] Furthermore, the reaction tube disk driving mechanism includes a lifting control component and a rotation control component;

[0025] The lifting control assembly comprises a lifting spindle fixedly connected to the reaction tube tray, and a lifting motor drivingly connected to the bottom of the lifting spindle;

[0026] The rotation control assembly comprises a rotation main shaft fixedly sleeved and connected to the outer peripheral wall of the lifting main shaft, and a rotation motor connected to the rotation main shaft through a transmission belt.

[0027] Compared with the prior art, the present application provides a rotary liquid injection mechanism and an automatic analysis system using the same, wherein the liquid injection needle group of the rotary liquid injection assembly is located above the sleeve and can enter the reaction tube in the sleeve to inject liquid, and the rotary assembly can drive the sleeve to rotate. At the same time, since a first clamping position is provided on the top of the sleeve, correspondingly, a first clamping portion for engaging with the first clamping position is provided on the bottom of the rotating member. Therefore, during the rotary liquid injection process, the first clamping portion at the bottom of the rotating member can engage with the first clamping position on the top of the sleeve below it, so that the rotating member directly abuts and covers the top of the sleeve to form a relatively closed space therewith. When the reaction container rotates rapidly, liquid splashing is effectively prevented, cross contamination is prevented, and the accuracy of the detection and analysis results is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the structure of the liquid injection assembly provided in an embodiment of the present application;

[0030] Figure 2 A partial cross-sectional view of a liquid injection assembly provided in an embodiment of the present application;

[0031] Figure 3 An exploded view of the liquid injection assembly provided in an embodiment of the present application;

[0032] Figure 4 A cross-sectional view of the liquid injection assembly provided in an embodiment of the present application in a state of use after being in contact with a reaction container;

[0033] Figure 5 A diagram showing the use status of the rotary injection mechanism provided in an embodiment of the present application in an automatic analysis system;

[0034] Figure 6 A cross-sectional view of the use state of the liquid injection assembly provided in the embodiment of the present application in an automatic analysis system;

[0035] Figure 7 A cross-sectional view of the use state of the rotary injection mechanism provided in the embodiment of the present application in an automatic analysis system;

[0036] Figure 8 A diagram showing the usage status of the sleeve provided in an embodiment of the present application in an automatic analysis system.

[0037] Reference numerals:

[0038] 100-rotating injection mechanism;

[0039] 10-shaft sleeve;

[0040] 11- first card connection position;

[0041] 111-concave;

[0042] 112-convex;

[0043] 12-hole sleeve;

[0044] 20-liquid injection assembly;

[0045] 21- injection needle set;

[0046] 211-first stitch;

[0047] 2111-first through hole;

[0048] 212-second stitch;

[0049] 2121-second through hole;

[0050] 213-fixed sleeve;

[0051] 22-fixed support;

[0052] 23- injection needle sleeve;

[0053] 231-guide sleeve;

[0054] 2311-activity block;

[0055] 2312-first stopper;

[0056] 2313-second longitudinal chute;

[0057] 232-compression spring;

[0058] 233-bearing fixing sleeve;

[0059] 2331-first longitudinal chute;

[0060] 234-rotating member;

[0061] 2341-Connection part;

[0062] 2342-Enlargement Department;

[0063] 2343-first engaging portion;

[0064] 2343a-bump;

[0065] 235-first elastic member;

[0066] 30-liquid injection support plate;

[0067] 40-liquid injection lifting mechanism;

[0068] 41-liquid injection lifting shaft;

[0069] 42-Liquid injection lifting motor;

[0070] 50-rotating assembly;

[0071] 51-rotating transmission member;

[0072] 52-axis pin;

[0073] 200-Automatic analysis system;

[0074] 201-reaction tube plate;

[0075] 202-reaction tube disk driving mechanism;

[0076] 2021-Lifting spindle;

[0077] 2022-rotating spindle;

[0078] 2023-Lifting motor;

[0079] 300-Reaction vessel. DETAILED DESCRIPTION

[0080] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0081] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0082] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0083] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0084] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0085] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0086] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0087] like Figures 1 to 8 As shown, the embodiment of the present application provides a rotary liquid injection mechanism 100, and an automatic analysis system 200 using the rotary liquid injection mechanism 100. The rotary liquid injection mechanism 100 may include a sleeve 10 for sleeve-mounting a reaction container 300, and a first clamping position 11 is provided on the top of the sleeve 10; and a liquid injection assembly 20 located above the sleeve 10, and the liquid injection assembly 20 may include a liquid injection needle group 21 connected to the liquid path device and a liquid injection needle sleeve 23 sleeved on the outer periphery of the liquid injection needle group 21, and a rotating member 234 capable of covering the top of the sleeve 10 is provided at the bottom of the liquid injection needle sleeve 23, and a first clamping portion 2343 for clamping with the aforementioned first clamping position 11 is provided at the bottom of the rotating member 234; and a rotating assembly 50, and the rotating assembly 50 is drivingly connected to the aforementioned sleeve 10 to drive the sleeve 10 to rotate.

[0088] like Figures 5 to 8 As shown, the embodiment of the present application provides an automatic analysis system 200 including the aforementioned rotary liquid injection mechanism 100, a reaction tube disc 201, and a reaction tube disc driving mechanism 202 for driving the reaction tube disc 201 to rotate and lift; the reaction tube disc 201 is fixedly connected with a plurality of rotatable shaft sleeves 10; the reaction tube disc driving mechanism 202 can drive the reaction tube disc 201 to rotate to the bottom of the aforementioned liquid injection component 20, so that the rotary liquid injection mechanism 100 can realize the rotary liquid injection function in the automatic analysis system 200, and at the same time effectively prevent liquid splashing, prevent cross contamination, and ensure the accuracy of the detection and analysis results.

[0089] Compared with the prior art, the rotary injection mechanism 100 and the automatic analysis system 200 using the same provided in the embodiment of the present application, the injection needle group 21 of the rotary injection component 20 is located above the sleeve 10 and can enter the reaction tube in the sleeve 10 to inject liquid, the rotating component 50 can drive the sleeve 10 to rotate, and at the same time, since the top of the sleeve 10 is provided with a first clamping position 11, correspondingly, the bottom of the rotating member 234 is provided with a first clamping portion 2343 for engaging with the first clamping position 11, then during the rotary injection process, the first clamping portion 2343 at the bottom of the rotating member 234 can be engaged with the first clamping position 11 at the top of the sleeve 10 located below it, so that the rotating member 234 directly abuts and covers the top of the sleeve 10 to form a relatively closed space therewith, and when the reaction container 300 rotates rapidly, liquid splashing is effectively prevented, cross contamination is prevented, and the accuracy of the detection and analysis results is ensured.

[0090] Further, such as Figure 5 and Figure 6 As shown, the reaction tube tray driving mechanism 202 may specifically include a lifting control component and a rotation control component; the lifting control component may specifically include a lifting spindle 2021 fixedly connected to the reaction tube tray 201, and a lifting motor 2023 drivingly connected to the bottom of the lifting spindle 2021; the rotation control component includes a rotating spindle 2022 fixedly sleeved and connected to the outer peripheral wall of the lifting spindle 2021, and a rotating motor drivingly connected to the rotating spindle 2022 through a transmission belt. With this arrangement, the reaction tube tray driving mechanism 202 can realize the rotation and lifting functions of the reaction tube tray 201 in the most space-saving manner and the most compact structural connection manner.

[0091] In order to facilitate the fixed support and positioning of the injection assembly 20 of the aforementioned rotating injection mechanism 100, and to facilitate the driving of the injection assembly 20 to move up and down, as Figures 5 to 7 As shown, the aforementioned rotating injection mechanism 100 provided in the embodiment of the present application may also include an injection support plate 30 that fixedly supports the aforementioned injection component 20, and an injection lifting mechanism 40 that drives the injection support plate 30 to rise and fall; the injection lifting mechanism 40 can drive the injection support plate 30 to drive the injection component 20 to descend until the rotating member 234 of the injection needle sleeve 23 is covered on the top of the sleeve 10, and at the same time, the first clamping portion 2343 of the rotating member 234 is clamped and abutted against the first clamping position 11 of the sleeve 10, and at the same time, the aforementioned injection needle group 21 enters into the reaction container 300 in the sleeve 10, so that the injection needle group 21 can realize the injection of liquid into the reaction container 300.

[0092] Regarding the liquid injection lifting mechanism 40 in the aforementioned embodiment, Figure 5 and Figure 7As shown, in a specific embodiment, the liquid injection lifting mechanism 40 may include a liquid injection lifting shaft 41 connected to the aforementioned liquid injection support plate 30 and a liquid injection lifting motor 42 connected to the liquid injection lifting shaft 41 .

[0093] like Figures 1 to 4 As shown, a specific embodiment is that the aforementioned injection needle sleeve 23 may include a guide sleeve 231 fixedly connected to the aforementioned injection support plate 30, a bearing fixing sleeve 233 longitudinally slidably connected to the outer periphery of the guide sleeve 231, and the aforementioned rotating member 234 rotatably connected to the bottom of the bearing fixing sleeve 233; the injection needle group 21 sequentially passes through the interior of the guide sleeve 231 and the bearing fixing sleeve 233 and passes out of the rotating member 234, and the injection needle group 21 is fixedly connected to the guide sleeve 231, specifically, the outer wall of the injection needle group 21 may be sleeved and fixed with a fixed shaft sleeve 213, and the injection needle group 21 is fixedly connected to the inner wall of the guide sleeve 231 through the fixed shaft sleeve 213 to protect the injection needle group 21 from being easily damaged; a first elastic member 235 is abutted between the top of the rotating member 234 and the bottom of the guide sleeve 231. By setting the first elastic member 235, the rotating member 234 and the sleeve 10 can form a closed space, while the first clamping portion 2343 at the bottom of the rotating member 234 can be flexibly abutted against the first clamping position 11 at the top of the sleeve 10. The first clamping portion 2343 can automatically abut against the first clamping position 11 at the initial stage of rotation, thereby improving the availability of the device and extending the service life of the device.

[0094] Furthermore, the bottom of the guide sleeve 231 is provided with a movable block 2311 slidably connected to the inner wall thereof, and a compression spring 232 is abutted between the top of the movable block 2311 and the top of the guide sleeve 231, and the compression spring 232 is sleeved outside the fixed sleeve 213; the opposite ends of the first elastic member 235 are respectively abutted against the bottom of the movable block 2311 and the top of the rotating member 234. The provision of the compression spring 232 can effectively prevent the injection needle assembly 21 from being accidentally touched and causing the needle to break.

[0095] Furthermore, the aforementioned injection assembly 20 may also include a fixed support 22 fixedly connected to the injection support plate 30, the top of the aforementioned guide sleeve 231 may be fixedly connected to the fixed support 22, and the fixed support 22 may be fixedly connected to the injection support plate 30 by means of pins or the like.

[0096] A specific embodiment is as follows Figures 1 to 4As shown, the outer periphery of the aforementioned bearing fixing sleeve 233 may be specifically provided with a first longitudinal groove 2331, and the outer periphery of the aforementioned guide sleeve 231 may be specifically provided with a first stopper 2312 capable of moving longitudinally in the first longitudinal groove, so that the bearing fixing sleeve 233 is sleeved on the outer periphery of the guide sleeve 231 and is slidably connected with the guide sleeve 231 along the longitudinal direction, and this specific connection method is reliable and has good effect.

[0097] Another specific embodiment is, Figures 1 to 4 As shown, the outer periphery of the aforementioned guide sleeve 231 may be specifically provided with a second longitudinal groove 2313, and the outer periphery of the aforementioned movable block 2311 may be specifically provided with a first sliding block slidably connected to the second longitudinal groove 2313, so that the movable block 2311 can be longitudinally slidably connected to the inner wall of the guide sleeve 231, and this specific connection method is reliable and has good effect.

[0098] Regarding the aforementioned rotating member 234, a specific embodiment is as follows: Figures 1 to 4 As shown, the rotating member 234 may specifically include a connecting portion 2341 rotatably connected to the bottom inner wall of the aforementioned bearing fixing sleeve 233, and an enlarged portion 2342 located downstream of the connecting portion 2341, the bottom of the enlarged portion 2342 is provided with the aforementioned first engaging portion 2343, and the cross section of the enlarged portion 2342 is gradually enlarged from the top where it is connected to the connecting portion 2341 to the bottom thereof. The enlarged portion 2342 realizes a closed space covered with the shaft sleeve 10, and this implementation method is simple, direct, reliable, and has a good effect.

[0099] A more specific embodiment is as follows Figure 8 As shown, the first engaging position 11 at the top of the shaft sleeve 10 can be specifically configured as a concave surface 111 and a convex surface 112 that are alternately and continuously arranged in sequence along the circumference of the shaft sleeve 10; correspondingly, the first engaging portion 2343 at the bottom of the enlarged portion 2342 of the rotating member 234 can be specifically configured as at least two convex blocks 2343a that can be engaged with the concave surface 111 and are arranged along the circumference of the bottom of the enlarged portion 2342. Such an arrangement facilitates mutual abutment and the structural arrangement is reliable.

[0100] Another more specific embodiment is, Figure 4 As shown, the aforementioned injection needle group 21 may specifically include a first needle 211 and a second needle 212 extending longitudinally, wherein the first needle 211 and the second needle 212 are respectively provided with a first through hole 2111 and a second through hole 2121, and the first through hole 2111 and the second through hole 2121 are arranged opposite to each other. The first through hole 2111 and the second through hole 2121 opposite to each other are in the reaction container 300 for rotating injection, which can effectively improve the cleaning efficiency and the degree of cleanliness of the cleaning.

[0101] Another specific embodiment is, Figure 7As shown, the aforementioned rotating assembly 50 may specifically include a first rotating motor, a rotating transmission member 51 drivingly connected to the first rotating motor, and a rotating driving member drivingly connected to the rotating transmission member 51, the rotating driving member is drivingly connected to the aforementioned sleeve 10; specifically, preferably, the inner wall of the sleeve 10 is provided with a hole sleeve 12, and the rotating driving member is a shaft pin 52 that can be inserted into the hole sleeve 12. With such a configuration, the rotating assembly 50 can directly and reliably realize the rotation driving function of the injection assembly 20.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A rotary injection mechanism, characterized in that: include: A shaft sleeve for sleeve-mounting a reaction container, wherein the top of the shaft sleeve is provided with a first clamping position; An injection assembly is located above the shaft sleeve, the injection assembly includes an injection needle group connected to the liquid path device and an injection needle sleeve sleeved on the outer periphery of the injection needle group, the bottom of the injection needle sleeve is provided with a rotating member capable of covering the top of the shaft sleeve, and the bottom of the rotating member is provided with a first engaging portion for engaging with the first engaging position; A rotating assembly is drivingly connected to the shaft sleeve to drive the shaft sleeve to rotate.

2. The rotary injection mechanism according to claim 1, characterized in that: Also includes: A liquid injection support plate fixedly supporting the liquid injection assembly, and a liquid injection lifting mechanism driving the liquid injection support plate to lift; The injection lifting mechanism can drive the injection support plate to drive the injection assembly to descend until the rotating part of the injection needle sleeve covers the top of the sleeve, and at the same time, the first clamping part is clamped and abutted against the first clamping position, and at the same time, the injection needle group enters the reaction container in the sleeve.

3. The rotary injection mechanism according to claim 2, characterized in that: The injection needle sleeve comprises a guide sleeve fixedly connected to the injection support plate, a bearing fixing sleeve longitudinally slidably connected to the outer periphery of the guide sleeve, and the rotating member rotatably connected to the bottom of the bearing fixing sleeve; the injection needle group sequentially passes through the interior of the guide sleeve and the bearing fixing sleeve and passes through the rotating member, and is fixedly connected to the guide sleeve; a first elastic member is abutted between the top of the rotating member and the bottom of the guide sleeve.

4. The rotary injection mechanism according to claim 3, characterized in that: The outer wall of the injection needle assembly is sleeved with a fixed shaft sleeve, and the fixed shaft sleeve is fixedly connected to the inner wall of the guide sleeve; The bottom of the guide sleeve is provided with a movable block slidably connected to its inner wall, and a compression spring is abutted between the top of the movable block and the top of the guide sleeve, and the compression spring is sleeved outside the fixed shaft sleeve; the opposite ends of the first elastic member are respectively abutted against the bottom of the movable block and the top of the rotating member.

5. The rotary injection mechanism according to claim 4, characterized in that: A first longitudinal slot is disposed on the outer periphery of the bearing fixing sleeve, and a first stopper capable of longitudinally moving in the first longitudinal slot is disposed on the outer periphery of the guide sleeve; and / or A second longitudinal sliding groove is disposed on the outer periphery of the guide sleeve, and a first sliding block is disposed on the outer periphery of the movable block and is slidably connected to the second longitudinal sliding groove.

6. The rotary injection mechanism according to claim 4, characterized in that: The rotating member includes a connecting portion rotatably connected to the bottom inner wall of the bearing fixing sleeve, and an enlarged portion located downstream of the connecting portion. The bottom of the enlarged portion is provided with the first clamping portion, and the cross-section of the enlarged portion is gradually enlarged from the top where it is connected to the connecting portion to the bottom thereof.

7. The rotary injection mechanism according to claim 6, characterized in that: The first engaging position is configured as a concave surface and a convex surface that are alternately and continuously arranged along the circumference of the sleeve, and the first engaging portion is configured as at least two protrusions that are arranged along the bottom circumference of the enlarged portion and can be engaged with the concave surface.

8. The rotary injection mechanism according to claim 4, characterized in that: The injection needle set comprises a first needle and a second needle extending longitudinally, the first needle and the second needle are respectively provided with a first through hole and a second through hole, and the first through hole and the second through hole are arranged opposite to each other; and / or The rotating assembly includes a first rotating motor, a rotating transmission member drivingly connected to the first rotating motor, and a rotating drive member drivingly connected to the rotating transmission member, the rotating drive member is drivingly connected to the bushing; a hole sleeve is provided on the inner wall of the bushing, and the rotating drive member is an axle pin that can be inserted into the hole sleeve.

9. An automatic analysis system, characterized in that: The invention comprises the rotary liquid injection mechanism according to any one of claims 1 to 8, and a reaction tube disc and a reaction tube disc driving mechanism for driving the reaction tube disc to rotate and lift; A plurality of rotatable shaft sleeves are fixedly connected to the reaction tube disk; The reaction tube disk driving mechanism can drive the reaction tube disk to rotate to below the liquid injection assembly.

10. The automatic analysis system according to claim 9, characterized in that: The reaction tube disk driving mechanism includes a lifting control component and a rotation control component; The lifting control assembly comprises a lifting spindle fixedly connected to the reaction tube tray, and a lifting motor drivingly connected to the bottom of the lifting spindle; The rotation control assembly comprises a rotation main shaft fixedly sleeved and connected to the outer peripheral wall of the lifting main shaft, and a rotation motor connected to the rotation main shaft through a transmission belt.

Images