Injection syringe positioning assembly and injection pump

Abstract

The utility model provides an injector positioning assembly and an injection pump. The injector positioning assembly comprises a shell, a rotating piece, a fixing piece, a transmission piece and a compression spring, and the shell is provided with a bearing face and a fixing face. The rotating part comprises a handle and a first connecting shaft which are connected with each other, the first connecting shaft is rotatably arranged in the shell, and the handle is located outside the shell and configured to clamp an injector on a bearing surface; the fixing piece comprises a fixing piece which is located outside the shell and is opposite to the fixing face. Under the condition that the handle rotates back to the bearing face, the rotating piece drives the fixing piece to move back to the fixing face through the transmission piece. The first connecting shaft is sleeved with the compressed spring, one end of the compressed spring is connected to the first connecting shaft, the other end of the compressed spring abuts against the transmission piece, and the compressed spring can push the transmission piece to move axially. Through the connection and cooperation among the rotating part, the transmission part, the pressure spring and other structural parts, the process of clamping the injector by the injector positioning assembly can be easily realized, and the operation is simple and convenient.

Description

Technical Field

[0001] The present application relates to the field of medical equipment, and in particular to a syringe positioning assembly and a syringe pump. Background Art

[0002] The positioning assembly in the injection pump is used to fix the syringe in the injection pump. In the prior art, the components in the positioning assembly corresponding to the fixed barrel and the curled edge of the barrel end generally need to be controlled separately, which makes the syringe fixing process complicated and inconvenient to operate. A torsion spring is generally provided in the positioning assembly, which aims to utilize the restoring force generated by torsion to achieve the clamping process of the syringe barrel. However, the torsion spring has low structural strength, poor stability, easy deformation, short service life and other problems, which affects the reliability of using the positioning assembly to fix the syringe. Utility Model Content

[0003] The utility model aims to provide a syringe positioning component, which has high working efficiency, is simple to operate, and can realize an adaptive clamping process for syringes of different sizes.

[0004] In the first aspect, the embodiment of the present application provides a syringe positioning assembly. The syringe positioning assembly includes a housing having a bearing surface and a fixed surface; a rotating member including a handle and a first connecting shaft connected thereto, the first connecting shaft being rotatably disposed in the housing, the handle being located outside the housing, and the handle being configured to clamp the syringe on the bearing surface; a fixing member being movably connected to the housing, the fixing member including a fixing plate, the fixing plate being located outside the housing and opposite to the fixed surface; a transmission member being connected to the first connecting shaft and the fixing member; when the handle is rotated away from the bearing surface, the rotating member drives the fixing plate to move away from the fixed surface through the transmission member; and a compression spring, the compression spring being sleeved on the first connecting shaft, one end of the compression spring being connected to the first connecting shaft, the other end of the compression spring being abutted against the transmission member, and the compression spring being able to push the transmission member to move axially.

[0005] In one possible implementation, the transmission member includes a first transmission part and a second transmission part that cooperate with each other. The first transmission part is fixed to the first connecting shaft, and the second transmission part is axially movably sleeved on the first connecting shaft. The second transmission part is provided with a guide groove, which is a spiral structure, and the first transmission part is embedded in the guide groove.

[0006] In a possible implementation, the second transmission part is further provided with a push member, which can move axially and is configured to push the fixing member to move the fixing plate away from the fixing surface.

[0007] In a possible implementation, the transmission member also includes a third transmission part and a fourth transmission part that cooperate with each other; the third transmission part is fixed to the first connecting shaft, and the fourth transmission part is axially movable and sleeved on the first connecting shaft, and the fourth transmission part is provided with a limiting groove and a push member, the limiting groove is a spiral structure, and the third transmission part is embedded in the limiting groove; the push member can move axially and is configured to push the fixing part to move the fixing plate back to the fixing surface; the fourth transmission part is spaced apart from the second transmission part, and the compression spring is located between the fourth transmission part and the second transmission part.

[0008] In a possible implementation, the pushing member includes an abutting portion, the abutting portion is parallel to the first connecting axis, and the abutting portion is configured to push against the fixing member.

[0009] In a possible implementation, along the axial direction of the first connecting shaft, the distance between the two ends of the limiting groove is greater than the distance between the two ends of the guiding groove.

[0010] In one possible implementation, the guide groove has a first end and a second end, and the first end is closer to the fixed plate relative to the second end; the limiting groove has a third end and a fourth end, and the third end is closer to the fixed plate relative to the fourth end; when the handle is rotated to the maximum position, the first transmission part is located at the second end, the third transmission part is located at the fourth end, and the push member moves the fixed plate to the maximum displacement.

[0011] In a possible implementation, a positioning groove is provided at the second end; the positioning groove is configured to keep the handle at the maximum position when the first transmission part is located in the positioning groove.

[0012] In one possible implementation, a positioning member is provided on the first connecting shaft, the positioning member is located between the fourth transmission part and the second transmission part, and the two ends of the compression spring are respectively abutted against the positioning member and the second transmission part; a stop member is provided in the shell, the positioning member is located between the stop member and the compression spring, and the stop member is configured to limit the axial position of the positioning member.

[0013] In a possible implementation, a first limiting structure is provided on the second transmission part and the fourth transmission part, a second limiting structure is provided in the shell, and the second limiting structure cooperates with the first limiting structure to limit the rotation of the second transmission part and the fourth transmission part.

[0014] In a possible implementation, the syringe positioning assembly further includes a blocking member, which is connected to the housing and located outside the housing, and is configured to limit an opening angle of the handle.

[0015] In a possible implementation, the syringe positioning assembly further includes a sealing member, which is located inside the housing and abuts against the housing, is sleeved on the first connecting shaft, and is connected to the blocking member.

[0016] In a possible implementation, the compression spring is located between the sealing member and the transmission member, and one end of the compression spring abuts against the sealing member.

[0017] In one possible implementation, the fixing member also includes a second connecting shaft, one end of which is connected to the fixing plate, and the other end of the second connecting shaft is movably disposed in the shell; the fixing member also includes a stop block, which is fixed to the end of the second connecting shaft, and the stop block is located in the shell, and the stop block is configured to limit the maximum distance that the second connecting shaft can move in the axial direction of the second connecting shaft.

[0018] In one possible implementation, the fixing member also includes an elastic ring, which is sleeved on the second connecting shaft, one end of the elastic ring is connected to the shell, and the other end of the elastic ring abuts against the stop block. The elastic ring can push the stop block to move axially along the second connecting shaft to drive the fixing plate to move toward the fixing surface.

[0019] In a possible implementation, there are two second connecting shafts, the two second connecting shafts are connected to the fixing plate at intervals, the number of the elastic rings and the two stop blocks is also two, and the two second connecting shafts, the two elastic rings and the two stop blocks are arranged in a one-to-one correspondence.

[0020] In one possible implementation, the fixing member further includes a paddle, the syringe positioning assembly further includes a trigger switch, the trigger switch is connected to the housing, the paddle is connected to the second connecting shaft, and the paddle is configured to move with the second connecting shaft to contact or separate from the trigger switch.

[0021] In a second aspect, an embodiment of the present application provides a syringe pump, which includes a syringe positioning assembly in any one of the above-mentioned implementations.

[0022] The embodiment of the present application arranges the coordination of structural parts such as rotating parts, fixed parts and transmission parts. The user can make the fixed part move only by operating the handle, so that the syringe barrel and the curled edge of the syringe barrel can be conveniently installed and placed in the corresponding positions, thereby improving the working efficiency of the syringe positioning assembly. Moreover, by arranging a compression spring, after the barrel of the syringe is placed between the handle and the bearing surface, it is only necessary to cancel the force applied to the handle, so that the handle can automatically move to clamp the barrel of the syringe under the action of the deformation recovery force of the compression spring, effectively simplifying the process of clamping the barrel of the syringe with the handle, and realizing the adaptive clamping process of the syringe positioning assembly for the barrels of syringes of different sizes, which is convenient for users to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a syringe positioning assembly provided in an embodiment of the present application;

[0024] Figure 2 yes Figure 1 The structure schematic diagram of the syringe positioning assembly shown in another perspective;

[0025] Figure 3 yes Figure 2 The partial structure diagram of the syringe positioning assembly shown Figure 1 ;

[0026] Figure 4 yes Figure 2 The partial structure diagram of the syringe positioning assembly shown Figure 2 ;

[0027] Figure 5 yes Figure 4 The schematic diagram of the cross-sectional structure of the syringe positioning assembly shown at AA;

[0028] Figure 6 It is a schematic diagram of the working process of a syringe positioning assembly provided in an embodiment of the present application;

[0029] Figure 7 is another working process schematic diagram of a syringe positioning assembly provided in an embodiment of the present application;

[0030] Figure 8 is a structural schematic diagram of another syringe positioning assembly provided by the present application;

[0031] Fig. 9 yes Figure 8 A partial structural schematic diagram of the syringe positioning assembly shown;

[0032] Fig.10 yes Fig. 9 A schematic diagram of the working process of the syringe positioning assembly shown;

[0033] Fig.11 yes Fig. 9 Another schematic diagram of the working process of the syringe positioning assembly is shown.

[0034] X1-first direction, X2-second direction, A1-third direction, A2-fourth direction, 100-shell, 110-bearing surface, 120-fixing surface, 130-inner cavity, 140-blocking assembly, 141-blocking member, 142-sealing member, 150-second limiting structure, 160-stopper, 200-rotating member, 210-handle, 211-connecting part, 212-clamping part, 213-pressing part, 220-first connecting shaft, 221-positioning member, 240-coupling, 300-fixing member, 310-fixing plate, 320-second connecting Shaft, 330-shift block, 331-paddle, 340-elastic ring, 350-mounting block, 400-transmission member, 410-first transmission part, 420-second transmission part, 421-guide groove, 421a-first end, 421b-second end, 4211-positioning groove, 424-push member, 424a-abutment part, 425-first limiting structure, 430-third transmission part, 440-fourth transmission part, 441-limiting groove, 441a-third end, 441b-fourth end, 710-compression spring, 800-trigger switch, 900-angle sensor. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] All technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs. The directional terms mentioned in the embodiments of this application, such as "upper", "lower", "inner", "outer", etc., are only referenced to the directions of the accompanying drawings. Therefore, the directional terms used are intended to better and more clearly illustrate and understand the embodiments of this application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of this application.

[0037] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0038] References to "in some embodiments" and the like described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in some embodiments" and the like appearing in different places in this specification do not necessarily all refer to the same embodiment, but rather mean "one or more but not all embodiments", unless otherwise specifically emphasized. The term "including" and its variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0039] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0040] like Figure 1 and Figure 2 As shown, Figure 1 It is a structural schematic diagram of a syringe positioning assembly provided in an embodiment of the present application. Figure 2 yes Figure 1 The structure schematic diagram of the syringe positioning assembly shown in another perspective.

[0041] The injection pump may include a syringe positioning assembly. The injection pump is a medical device used to control the injection speed of the liquid medicine in the syringe. The syringe positioning assembly can be used to fix the syringe in the injection pump to achieve stable installation of the syringe.

[0042] The syringe positioning assembly provided in the embodiment of the present application can be used not only in the syringe pump, but also in other devices in other embodiments to fix the structure of the syringe, which is not limited in the present application. Figure 1 and Figure 2 The syringe includes a barrel and a curling edge, the barrel is a hollow cylinder, the curling edge is fixed to the end of the barrel, and protrudes relative to the outer surface of the barrel. In other embodiments, the syringe may also have other shapes, which is not limited in the present application.

[0043] The syringe positioning assembly may include a housing 100, wherein the housing 100 may be made of metal, plastic or a composite of multiple materials, which is not limited in the present application. The housing 100 is a basic component of the syringe positioning assembly, and may provide a mounting base for at least part of other components of the syringe positioning assembly, and play a role in strength support.

[0044] Exemplarily, the shell 100 may have an inner cavity 130, and other components in the syringe positioning assembly may be accommodated in the inner cavity 130. The shell 100 may protect the components located in the inner cavity 130 and prevent external factors such as water or dust from entering the inner cavity 130 and affecting the service life of the components in the syringe positioning assembly.

[0045] Exemplarily, the housing 100 may have a bearing surface 110, and the bearing surface 110 may be used to bear the syringe. Specifically, the bearing surface 110 may be used to bear the barrel of the syringe, wherein the shape of the bearing surface 110 may be adapted to the shape of the outer surface of the barrel of the syringe, so that when the barrel of the syringe is fixed on the bearing surface 110, the contact area between the bearing surface 110 and the barrel of the syringe can be effectively increased, which is conducive to improving the reliability of the syringe positioning assembly fixing the syringe. Exemplarily, the portion of the barrel of the syringe facing the bearing surface 110 may be a convex arc surface, and adaptively, the bearing surface 110 may be a concave arc surface, which is used to adapt the shape of the outer surface of the barrel of the syringe. In other embodiments, the shape of the bearing surface 110 may not be adapted to the shape of the outer surface of the barrel of the syringe, and this application is not limited to this.

[0046] Exemplarily, the housing 100 may have a fixed surface 120, and the fixed surface 120 may be used to fix the curling of the syringe. Among them, the shape of the fixed surface 120 may match the shape of the surface of the curling of the syringe facing the fixed surface 120. Then, when the curling of the syringe is fixed on the fixed surface 120, the contact area between the fixed surface 120 and the curling of the syringe can be effectively increased, which is also conducive to improving the reliability of the syringe positioning assembly fixing the syringe. Exemplarily, the surface of the curling of the syringe facing the fixed surface 120 may be flat, and adaptively, the fixed surface 120 may also be flat. In other embodiments, the shape of the fixed surface 120 may not be adapted to the shape of the curling of the syringe, and this application is not limited to this.

[0047] like Figure 1 , Figure 2 and Figure 3 As shown, Figure 3 yes Figure 2 The partial structure diagram of the syringe positioning assembly shown Figure 1 .

[0048] In some embodiments, the syringe positioning assembly may further include a rotating member 200, which may include a handle 210 and a first connecting shaft 220 connected to each other. The first connecting shaft 220 may be rotatably disposed in the shell 100, and the handle 210 may be located outside the shell 100. The handle 210 is configured to clamp the syringe on the supporting surface 110. Specifically, the user can rotate the handle 210 in the direction toward the bearing surface 110, or rotate the handle 210 in the direction away from the bearing surface 110. When the handle 210 is rotated in the direction toward the bearing surface 110 away from the shell 100, the distance between the handle 210 and the bearing surface 110 can be increased, thereby releasing the space between the handle 210 and the bearing surface 110, so that the barrel of the syringe can be smoothly installed on the bearing surface 110; when the handle 210 is rotated in the direction toward the bearing surface 110, the distance between the handle 210 and the bearing surface 110 can be reduced. When the syringe has been placed on the bearing surface 110, the handle 210 can be rotated in the direction toward the bearing surface 110 to be pressed against the barrel of the syringe, so that the barrel of the syringe can be clamped between the handle 210 and the bearing surface 110, thereby achieving the fixation of the barrel of the syringe by the syringe positioning assembly. In the embodiment of the present application, by providing a handle 210 located outside the housing 100, it is convenient for the user to operate so as to achieve the clamping process of the barrel of the syringe.

[0049] Exemplarily, the handle 210 may include a connecting portion 211 and a clamping portion 212, wherein the connecting portion 211 may be fixed to the first connecting shaft 220, and the clamping portion 212 is used to clamp the syringe on the bearing surface 110, and the clamping portion 212 may be bent relative to the connecting portion 211 toward the bearing surface 110. The shape of the surface of the clamping portion 212 facing the bearing surface 110 may be adapted to the shape of the outer surface of the barrel of the syringe. Exemplarily, the surface of the barrel of the syringe facing the clamping portion 212 may be a convex arc surface, and correspondingly, the shape of the surface of the clamping portion 212 facing the bearing surface 110 may be a concave arc surface, so that when the barrel of the syringe is fixed between the clamping portion 212 and the bearing surface 110, the contact area between the clamping portion 212 and the barrel of the syringe is effectively increased, which is conducive to improving the reliability of the clamping portion 212 and the bearing surface 110 in cooperating to clamp the syringe. In other embodiments, the shape of the surface of the clamping portion 212 facing the carrying surface 110 may also be V-shaped, arc-shaped, or a combination of multiple shapes, which is not limited in the present application.

[0050] For example, the handle 210 may further include a pressing portion 213, which may be connected to the connecting portion 211 and located on the side of the clamping portion 212 away from the bearing surface 110, and is arranged obliquely relative to the clamping portion 212. By providing the pressing portion 213, it is possible to provide an operating space for the user, so that when the space between the clamping portion 212 and the syringe is small, for example, when the clamping portion 212 clamps the syringe, the user can turn the handle 210 by twisting the pressing portion 213 to release the syringe.

[0051] In some embodiments, the syringe positioning assembly may further include a blocking assembly 140, which may include a blocking member 141, which is connected to the housing 100 and located outside the housing 100, and which is located on the side of the handle 210 facing away from the bearing surface 110, and which is configured to limit the opening angle of the handle 210. The blocking member 141 is located on the rotation trajectory of the handle 210, and may play a role of limiting, preventing the handle 210 from continuing to rotate in the direction facing away from the bearing surface 110, so as to limit the maximum angle at which the handle 210 can rotate. The maximum angle at which the handle 210 can rotate can be adjusted by adjusting the height of the blocking member 141.

[0052] In some embodiments, the blocking component 140 may further include a sealing member 142, which may be located in the housing 100 and abut against the housing 100, and the sealing member 142 may be sleeved on the first connecting shaft 220. By providing the sealing member 142, it is possible to reduce the amount of foreign impurities entering the inner cavity 130 through the hole structure on the housing 100 through which the first connecting shaft 220 passes, so as to improve the service life of the structural parts in the inner cavity 130. Exemplarily, the sealing member 142 may be connected to the blocking member 141, for example, the sealing member 142 and the blocking member 141 may also be an integrally formed structural member, both made of materials such as silicone. This application is not limited thereto.

[0053] like Figure 2 , Figure 4 and Figure 5 As shown, Figure 4 yes Figure 2 The partial structure diagram of the syringe positioning assembly shown Figure 2 . Figure 5 yes Figure 4 The cross-sectional structure diagram of the syringe positioning assembly shown is at AA.

[0054] In some embodiments, the syringe positioning assembly may further include a fixing member 300, which may be movably connected to the shell 100. The fixing member 300 may include a fixing plate 310. The fixing plate 310 may be located outside the shell 100 and opposite to the fixing surface 120. The roll of the syringe may be fixed between the fixing plate 310 and the fixing surface 120 of the shell 100. Specifically, the fixing member 300 can be moved relative to the shell 100 so that the distance between the fixing plate 310 and the fixing surface 120 can be adjusted. For example, the fixing member 300 can be moved along the direction away from the fixing surface 120 to increase the distance between the fixing plate 310 and the fixing surface 120. When the distance between the fixing plate 310 and the fixing surface 120 increases to be greater than or equal to the thickness of the curled edge of the syringe, the curled edge of the syringe can be smoothly placed between the fixing plate 310 and the fixing surface 120 of the shell 100; the fixing member 300 can also be moved toward the fixing surface 120 to reduce the distance between the fixing plate 310 and the fixing surface 120. When the curled edge of the syringe is located between the fixing plate 310 and the fixing surface 120, the fixing member 300 is moved toward the fixing surface 120 to realize the clamping process of the curled edge of the syringe, thereby achieving the purpose of fixing the curled edge of the syringe barrel.

[0055] It is understandable that, for the sake of convenience in description, the syringe positioning assembly is defined as having a first direction X1, a second direction X2, a third direction A1, and a fourth direction A2, the direction in which the fixing plate 310 moves away from the fixing surface 120 of the housing 100 is the first direction X1, the direction in which the fixing plate 310 moves toward the fixing surface 120 of the housing 100 is the second direction X2, the direction in which the handle 210 rotates away from the bearing surface 110 of the housing 100 is the third direction A1, and the direction in which the handle 210 rotates toward the bearing surface 110 of the housing 100 is the fourth direction A2. In other embodiments, the coordinate system setting of the syringe positioning assembly can be flexibly set according to specific actual needs.

[0056] In some embodiments, the fixing member 300 may further include a second connecting shaft 320, one end of which is connected to the fixing plate 310, and the other end of which is movably disposed in the housing 100. Exemplarily, the fixing member 300 may further include a stopper 330, which may be fixed to the end of the second connecting shaft 320, and the stopper 330 is located in the housing 100, and the projection of the stopper 330 on the housing 100 may cover the caliber of the pin hole on the housing 100 through which the second connecting shaft 320 passes, and the stopper 330 is used to limit the maximum distance of movement of the second connecting shaft 320 in the first direction X1, so as to prevent the fixing member 300 from excessively moving in the first direction X1, and moving out of the housing 100, and separating from the housing 100, which may affect the reliability of the syringe positioning assembly. The embodiment of the present application is introduced by taking the example that the stop block 330 and the second connecting shaft 320 are fixedly connected by screws. In other embodiments, the stop block 330 can also be fixed to the end of the second connecting shaft 320 by welding or gluing, etc., and the present application does not limit this.

[0057] In some embodiments, the fixing member 300 may further include an elastic ring 340, which is sleeved on the second connecting shaft 320, one end of the elastic ring 340 is connected to the housing 100, and the other end of the elastic ring 340 is abutted against the stop block 330. The elastic ring 340 can push the stop block 330 to move along the axial direction of the second connecting shaft 320, so as to drive the fixing plate 310 to move toward the fixing surface 120. When the fixing member 300 moves away from the fixing surface 120 of the housing 100, that is, when the fixing member 300 moves along the first direction X1, the elastic ring 340 can be squeezed by the stop block 330 and the housing 100 to produce deformation, so that when the stop block 330 is no longer subjected to the force of the first direction X1 and moves toward the first direction X1, the restoring deformation force of the elastic ring 340 can drive the stop block 330 to move toward the second direction X2, that is, the fixing plate 310 moves toward the fixing surface 120 of the housing 100, so that the fixing member 300 can clamp the curling edge of the syringe. Therefore, when the distance between the fixing plate 310 and the fixing surface 120 of the shell 100 increases so that the curled edge of the syringe can be placed between the fixing member 300 and the fixing surface 120 of the shell 100, the user only needs to cancel the force applied to the fixing member 300 in the first direction X1, so that the fixing member 300 can automatically move along the second direction X2 to clamp the curled edge of the syringe, effectively simplifying the operation of the syringe positioning assembly of the present application.

[0058] In some embodiments, the number of the second connecting shafts 320 can be two, and the two second connecting shafts 320 are connected to the fixing plate 310 at intervals. The number of the elastic rings 340 and the stop blocks 330 can also be two, and the two second connecting shafts 320, the two elastic rings 340 and the two stop blocks 330 are arranged in a one-to-one correspondence. By setting the number of the elastic rings 340 to be two, after the force applied to the fixing plate 310 in the first direction X1 is cancelled, both sides of the fixing plate 310 can be affected by the elastic restoring force of the elastic rings 340, which can balance the forces applied to both sides of the fixing plate 310, improve the stability of the posture of the fixing plate 310 when it moves along the second direction X2, and avoid the phenomenon of the fixing plate 310 being skewed when the force is applied to one side.

[0059] In some embodiments, the syringe positioning assembly may further include a mounting block 350, the stop block 330 and the fixing plate 310 are located on opposite sides of the mounting block 350, the second connecting shaft 320 is passed through the mounting block 350, and the mounting block 350 may be fixed in the housing 100 by means of snap connection or the like, so as to install the fixing member 300 in the housing 100. In other embodiments, the syringe positioning assembly may also not include the mounting block 350, and this application does not limit this. Among them, the ends of the mounting block 350 and the fixing plate 310 facing the syringe may be V-shaped, arc-shaped, or a combination of multiple shapes, so as to facilitate the syringe to be fixed to the syringe positioning assembly, avoiding and adapting to the shape of the remaining structures of the syringe, such as the syringe barrel, etc.

[0060] like Figure 2 , Figure 6 and Figure 7 As shown, Figure 6 It is a schematic diagram of the working process of a syringe positioning assembly provided in an embodiment of the present application. Figure 7 This is another schematic diagram of the working process of a syringe positioning assembly provided in an embodiment of the present application.

[0061] In some embodiments, the syringe positioning assembly may include a transmission member 400, which may be connected to the first connecting shaft 220 and the fixing member 300; when the handle 210 is turned away from the bearing surface 110 (eg, Figure 1When the handle 210 is rotated along the third direction A1, the rotating member 200 can drive the fixing plate 310 to move away from the fixing surface 120 through the transmission member 400. In the embodiment of the present application, by setting the transmission member 400, the movement process of the rotating member 200 and the fixing member 300 can be coupled, so that when the handle 210 is rotated away from the bearing surface 110, that is, when the handle 210 moves along the third direction A1, the fixing plate 310 of the fixing member 300 can also be subjected to the force, and move along the direction away from the fixing surface 120 with the rotation process of the rotating member 200, that is, drive the fixing plate 310 to move along the first direction X1. In this way, the movement process of the handle 210 and the fixing plate 310 can be controlled by operating the handle 210, and the fixing process of the syringe barrel and the curling of the syringe can be realized. Compared with the prior art, it is necessary to operate the corresponding independent components separately to fix the barrel of the syringe and the curling of the syringe. The syringe positioning assembly of the present application can effectively improve the working efficiency of fixing the syringe.

[0062] Specifically, in some embodiments, the transmission member 400 may include a first transmission part 410 and a second transmission part 420 that cooperate with each other, the first transmission part 410 is fixed to the first connecting shaft 220, the second transmission part 420 is sleeved on the first connecting shaft 220 and can be axially movable, the second transmission part 420 is provided with a guide groove 421, the guide groove 421 may be a spiral structure, and the first transmission part 410 is embedded in the guide groove 421. Among them, the first transmission part 410 can rotate with the rotation of the first connecting shaft 220, and when the first transmission part 410 is embedded in the guide groove 421 of the second transmission part 420, the guide groove 421 can play a role in limiting the first transmission part 410, and the rotational force of the first transmission part 410 can act on the inner wall of the guide groove 421 to drive the second transmission part 420 to move axially.

[0063] Exemplarily, the groove type of the guide groove 421 can cooperate with the first transmission part 410, and the guide groove 421 has a first end 421a and a second end 421b. The first end 421a is close to the fixed plate 310 relative to the second end 421b. After the first transmission part 410 rotates along the third direction A1, the first transmission part 410 can also move relative to the second transmission part 420 along the direction from the first end 421a to the second end 421b of the guide groove 421. In other words, after the first transmission part 410 rotates along the third direction A1, the second transmission part 420 can be pushed to move axially relative to the first connecting shaft 220 to convert the rotational force into a linear motion force. Since the second transmission part 420 is detachably connected to the fixing member 300, the second transmission part 420 can drive the fixing member 300 to move along the first direction X1 when it moves, thereby realizing the transmission function of the transmission part 400, and realizing the fixing process of the syringe barrel and the curling edge of the syringe by rotating the handle 210.

[0064] The third direction A1 of the rotation of the rotating member 200 can be set to be set around the first direction X1 of the movement of the fixed member 300, that is, the first direction X1 is the axis of the rotation trajectory of the rotating member 200, and the guide groove 421 can be set to be spirally arranged on the second transmission part 420 around the first direction X1, so that the guide groove 421 can be distributed not only along the first direction X1, but also along the third direction A1. Therefore, in the process of the first transmission part 410 moving relative to the second transmission part 420 along the guide groove 421, the rotation force of the first transmission part 410 can act on the inner wall of the guide groove 421, so that the rotation force of the first transmission part 410 can be decomposed into a linear driving force acting on the second transmission part 420 and along the first direction X1, so that the second transmission part 420 moves relative to the first transmission part 410 along the first direction X1, and finally the fixed member 300 moves along the direction of the fixed surface 120 facing away from the shell 100.

[0065] In some embodiments, the second end 421b may be provided with a positioning groove 4211, and the positioning groove 4211 is configured to keep the handle 210 at the maximum position when the first transmission part 410 is located in the positioning groove 4211. Exemplarily, the positioning groove 4211 may be opened in a direction perpendicular to the axis of rotation of the first connecting shaft 220. By providing the positioning groove 4211, when the first transmission part 410 is located in the positioning groove 4211, if no additional force is applied to make the first transmission part 410 slide out of the positioning groove 4211, the first transmission part 410 will be limited in the positioning groove 4211, thereby preventing the rotating member 200 from continuing to rotate, so that the handle 210 is relative to the bearing surface 110 (such as Figure 1 By providing the positioning groove 4211 at the second end 421b, the handle 210 can enter a hovering state when the opening angle relative to the carrying surface 110 is the largest. At this time, the space between the handle 210 and the carrying surface 110 is the largest, which can facilitate the syringe to be smoothly placed on the carrying surface 110.

[0066] In some embodiments, the second transmission part 420 is further provided with a push member 424, which can move axially and is configured to push the fixing member 300 so that the fixing sheet 310 faces away from the fixing surface 120 (eg, Figure 2The transmission member 400 can contact the fixing member 300 through the push member 424 to realize the pushing process of the fixing member 300. Exemplarily, the push member 424 can include an abutment portion 424a, and the abutment portion 424a can be parallel to the first connecting shaft 220, and the abutment portion 424a is configured to push the fixing member 300. In the process of the transmission member 400 driving the push member 424 to move, thereby contacting the fixing member 300 and pushing the fixing member 300, by setting the abutment portion 424a parallel to the first connecting shaft 220, it can be ensured that the transmission member 400 can provide the fixing member 300 with a force along the first direction X1, so as to push the fixing member 300 to move along the first direction X1, and realize the fixing process of the syringe crimping. Specifically, the abutment portion 424a can contact one of the stop blocks 330 of the fixing member 300 to push the fixing member 300 to move along the first direction X1. In other embodiments, the abutting portion 424a may also contact other components of the fixing member 300 to achieve the pushing process, which is not limited in the present application.

[0067] In some embodiments, the second transmission part 420 may be provided with a first limiting structure 425 (eg, Figure 2 As shown), a second limiting structure 150 (as shown) may be provided in the housing 100. Figure 2 As shown in FIG. 1 , the second limiting structure 150 can cooperate with the first limiting structure 425 to achieve the rotation limiting process of the second transmission part 420. For example, the second limiting structure 150 can include two protrusions (such as Figure 2 As shown in the figure, the first limiting structure 425 can be a channel provided on the second transmission part 420, and the first limiting structure 425 can be located between the two protrusions. By setting the first limiting structure 425 between the two protrusions, the second limiting structure 150 can limit the second transmission part 420 in the rotation direction of the rotating member 200, so as to limit the movement trajectory of the second transmission part 420, and prevent the second transmission part 420 from rotating relative to the housing 100 with the rotation of the rotating member 200, causing the components connected to the second transmission part 420, such as the push member 424, to rotate in the inner cavity 130, and collide with other structural components in the inner cavity 130, affecting the service life of the syringe positioning assembly. Among them, the first limiting structure 425 can also be a structure such as a groove or a protrusion provided on the second transmission part 420, and this is not limited in the present application.

[0068] In some embodiments, the syringe positioning assembly further includes a compression spring 710, which can be sleeved on the first connecting shaft 220, one end of the compression spring 710 abuts against the sealing member 142, and the other end abuts against the second transmission part 420, and the restoring deformation force of the compression spring 710 can drive the second transmission part 420 to move axially, thereby driving the handle 210 toward the bearing surface 110 (such as Figure 1When the rotating member 200 rotates away from the bearing surface 110, that is, when the handle 210 rotates along the third direction A1, the second transmission part 420 moves along the first direction X1 to push the fixing plate 310 to move along the first direction X1, and during the movement of the second transmission part 420 along the first direction X1, the compression spring 710 is squeezed by the second transmission part 420 and deformed. In this way, when the handle 210 is no longer rotated by the force, that is, when the second transmission part 420 no longer squeezes the compression spring 710 along the first direction X1, the restoring deformation force of the compression spring 710 can drive the second transmission part 420 to move along the second direction X2, so that the second transmission part 420 and the first transmission part 41 0, the force of the compression spring 710 along the second direction X2 can be converted into a force that drives the rotating member 200 to rotate along the fourth direction A2, so that the handle 210 rotates along the fourth direction A2, and the distance between the handle 210 and the bearing surface 110 is reduced. After the barrel of the syringe is placed between the handle 210 and the bearing surface 110, it is only necessary to cancel the force in the third direction A1 applied to the handle 210, so that the handle 210 can be automatically moved along the fourth direction A2 to clamp the barrel of the syringe, which effectively simplifies the process of the handle 210 clamping the barrel of the syringe, and realizes the adaptive clamping process of the syringe positioning assembly for the barrels of syringes of different sizes, which is convenient for users.

[0069] Please refer again Figure 6 and Figure 7 The fixing process of the syringe positioning assembly to the syringe may generally include a lifting process, a hovering process and a clamping process. In other embodiments, the fixing process of the syringe to the syringe may not include a hovering process, or may include more processes, which is not limited in the present application.

[0070] The lifting process can generally be as follows: rotating the handle 210 along the third direction A1 to release the space between the handle 210 and the bearing surface 110. At this time, the first transmission part 410 moves from the first end 421a toward the second end 421b, and the second transmission part 420 moves toward the side close to the fixing member 300, until the first transmission part 410 moves to the second end 421b, and the lifting process is considered to be completed.

[0071] The hovering process can generally be: the first transmission part 410 is located in the positioning groove 4211 at the second end 421b, and the positioning groove 4211 limits the movement of the first transmission part 410. At this time, the space between the handle 210 and the bearing surface 110 is the largest, which is conducive to smoothly installing the syringe into the syringe positioning assembly. In the embodiment of the present application, the position of the handle 210 relative to the bearing surface 110 at this time is also recorded as the maximum position of the handle 210, and the handle 210 is maintained at the maximum position relative to the bearing surface 110. After the syringe is loaded, the user lightly pushes the handle 210 along the fourth direction A2 so that the first transmission part 410 is disengaged from the positioning groove 4211, and the hovering process is deemed to be over.

[0072] The clamping process can generally be as follows: the compression spring 710 provides a restoring deformation force to push the second transmission part 420 to move along the second direction X2, so that the first transmission part 410 moves from the second end 421b toward the first end 421a, thereby driving the first connecting shaft 220 to rotate along the fourth direction A2, so that the handle 210 rotates along the fourth direction A2, and the space between the handle 210 and the bearing surface 110 is reduced until the handle 210 contacts the barrel of the syringe, and the clamping process is considered to be over. At this time, during the movement of the second transmission part 420 along the second direction X2, the distance between the abutment part 424a and the stop block 330 increases until they are separated. During this process, after the force of the abutment part 424a on the fixing member 300 along the first direction X1 is withdrawn, the fixing sheet 310 will also move along the second direction X2 under the push of the restoring deformation force of the elastic ring 340, thereby realizing the clamping process of the syringe roll.

[0073] In the embodiment of the present application, by arranging the cooperation of various structural parts in the syringe positioning assembly during different working processes, the clamping process of the barrel and the curling edge of the syringe can be realized, which can effectively improve the fixing efficiency of the syringe positioning assembly for the syringe.

[0074] Please refer to Figure 2 and Figure 4 In some embodiments, the fixing member 300 may further include a paddle 331, and the syringe positioning assembly may further include a trigger switch 800, the trigger switch 800 is connected to the housing 100, the paddle 331 is connected to the second connecting shaft 320, and the paddle 331 is configured to move with the second connecting shaft 320 to contact or separate from the trigger switch 800. Exemplarily, in the present application, the paddle 331 may be fixed to the stop block 330, and move with the second connecting shaft 320 together with the stop block 330. In other embodiments, the paddle 331 may also be directly connected to the end of the second connecting shaft 320, and the present application does not limit this.

[0075] During the movement of the fixing plate 310, the paddle 331 can move along with the second connecting shaft 320 in the first direction X1 or the second direction X2, thereby contacting or separating from the trigger switch 800. When the distance between the fixing plate 310 of the fixing member 300 and the fixing surface 120 of the shell 100 is minimal, the paddle 331 is configured to act on the trigger switch 800, so that the trigger switch 800 is turned on and a corresponding signal is generated. When the paddle 331 moves along the first direction X1 along the second connecting shaft 320, the paddle 331 separates from the trigger switch 800, the trigger switch 800 is turned off, and the corresponding signal disappears. When the curled edge of the syringe barrel is clamped by the fixing plate 310 and the shell 100, the curled edge of the syringe will block the contact between the paddle 331 and the trigger switch 800, and the paddle 331 and the trigger switch 800 will remain separated. Therefore, when the trigger switch 800 is continuously in a state of no signal, it can be determined that the curled edge of the syringe barrel has been installed between the fixing plate 310 and the fixing surface 120 of the shell 100, thereby facilitating the user to accurately judge the installation status of the syringe.

[0076] In some embodiments, the syringe positioning assembly may further include a coupling 240 and an angle sensor 900, wherein the angle sensor 900 may be fixed to the inner wall of the housing 100, the coupling 240 is located in the inner cavity 130, and is sleeved on the first connecting shaft 220, and the angle sensor 900 is connected to the end of the first connecting shaft 220 through the coupling 240. Exemplarily, the angle sensor 900 may be a rotary potentiometer. By setting the angle sensor 900, the user may also obtain the rotation angle of the first connecting shaft 220, and then obtain the moving stroke of the fixing member 300, and finally obtain the spacing between the fixing plate 310 and the fixing surface 120 of the housing 100, so as to facilitate the user to determine whether the curling edge of the syringe barrel can be placed between the fixing plate 310 and the fixing surface 120 of the housing 100.

[0077] In the above embodiments, the push member 424 is set on the second transmission part 420 as an example, and the syringe positioning assembly is designed accordingly. In other embodiments, the push member 424 and the second transmission part 420 can also have other relative position relationships. For example:

[0078] like Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, Figure 8 It is a structural schematic diagram of another syringe positioning assembly provided in the present application. Fig. 9 yes Figure 8 A partial structural schematic diagram of the syringe positioning assembly is shown. Fig.10 yes Fig. 9 Schematic diagram of the working process of the syringe positioning assembly shown. Fig.11 yes Fig. 9Another working process diagram of the syringe positioning assembly is shown. This embodiment can include most of the technical solutions of the above embodiments. The following mainly describes the differences between the two, and most of the same contents between the two are not repeated.

[0079] In some embodiments, the transmission member 400 may also include a third transmission part 430 and a fourth transmission part 440 that cooperate with each other; the third transmission part 430 is fixed to the first connecting shaft 220, and the fourth transmission part 440 can be axially movably sleeved on the first connecting shaft 220, and the fourth transmission part 440 can be provided with a limiting groove 441 and a push member 424, the limiting groove 441 is a spiral structure, and the third transmission part 430 is embedded in the limiting groove 441; the push member 424 can move axially and is configured to push the fixing member 300 to move the fixing plate 310 back to the fixing surface 120, the fourth transmission part 440 and the second transmission part 420 are arranged at intervals, and the compression spring 710 can be located between the fourth transmission part 440 and the second transmission part 420.

[0080] When the rotating member 200 faces away from the bearing surface 110 (eg Figure 1 When the handle 210 rotates along the third direction A1, that is, when the handle 210 rotates along the third direction A1, the third transmission part 430 will rotate with the rotating member 200, pushing the fourth transmission part 440 to move along the first direction X1, so as to drive the push member 424 to push the fixing plate 310 to move along the first direction X1, thereby realizing the coupling process of the rotating member 200 and the fixing member 300 through the transmission member 400. At this time, the first transmission part 410 will also rotate with the rotating member 200, pushing the second transmission part 420 to move along the first direction X1, and during the movement of the second transmission part 420 along the first direction X1, the compression spring 710 will be squeezed by the second transmission part 420 and deformed. In this way, when the handle 210 is no longer rotated by the force, that is, when the second transmission part 420 no longer squeezes the compression spring 710 along the first direction X1, the restoring deformation force of the compression spring 710 can drive the second transmission part 420 to move along the second direction X2, so that through the cooperation between the second transmission part 420 and the first transmission part 410, the compression spring 710 can be moved along the second direction X2. The force in the direction X2 is converted into a force that drives the rotating member 200 to rotate along the fourth direction A2, so that the handle 210 rotates along the fourth direction A2, thereby reducing the distance between the handle 210 and the bearing surface 110. After the barrel of the syringe is placed between the handle 210 and the bearing surface 110, it is only necessary to cancel the force in the third direction A1 applied to the handle 210, so that the handle 210 can automatically move along the fourth direction A2 to clamp the barrel of the syringe, which effectively simplifies the process of the handle 210 clamping the barrel of the syringe, and realizes the adaptive clamping process of the syringe positioning assembly for barrels of different sizes, which is convenient for users.

[0081] In some embodiments, the limiting groove 441 has a third end 441a and a fourth end 441b, and the third end 441a is close to the fixing plate 310 relative to the fourth end 441b; when the handle 210 is rotated to the maximum position, the first transmission part 410 is located at the second end 421b, the third transmission part 430 is located at the fourth end 441b, and the push member 424 moves the fixing plate 310 to the maximum displacement. In other words, the extending directions of the limiting groove 441 and the guide groove 421 are the same, and both can be set to be spirally arranged around the first direction X1. It can be understood that, for example, when the handle 210 is rotated along the third direction A1, the movement directions of the first transmission part 410 and the third transmission part 430 should be the same. If the extending directions of the limiting groove 441 and the guide groove 421 are opposite, the guide groove 421 will block the rotation process of the first transmission part 410, or the limiting groove 441 will block the rotation process of the third transmission part 430, affecting the rotation process of the rotating member 200, thereby affecting the working process of the syringe positioning assembly.

[0082] In some embodiments, along the axial direction of the first connecting shaft 220, the distance between the two ends of the limit groove 441 is greater than the distance between the two ends of the guide groove 421, that is, when the handle 210 is rotated by the same angle, the path of the fourth transmission part 440 moving relative to the shell 100 in the axial direction of the first connecting shaft 220 will be longer than the path of the second transmission part 420 moving relative to the shell 100 in the axial direction of the first connecting shaft 220, which is beneficial to reduce the length required for the push member 424.

[0083] In some embodiments, a positioning member 221 is provided on the first connecting shaft 220, and the positioning member 221 is located between the fourth transmission part 440 and the second transmission part 420, and the two ends of the compression spring 710 are respectively abutted against the positioning member 221 and the second transmission part 420; a stopper 160 is provided in the housing 100, and the positioning member 221 is located between the stopper 160 and the compression spring 710, and the stopper 160 is configured to axially limit the positioning member 221. By setting the cooperation between the stopper 160 and the positioning member 221, the direction of action of the deformation restoring force of the compression spring 710 can be limited, ensuring that one end of the compression spring 710 is fixed on the first connecting shaft 220, and preventing the compression spring 710 from slipping on the first connecting shaft 220, which affects the pushing effect of its deformation restoring force on the second transmission part 420.

[0084] In some embodiments, the second transmission part 420 and the fourth transmission part 440 are both provided with a first limiting structure 425, and the housing 100 is provided with a second limiting structure 150, and the second limiting structure 150 cooperates with the first limiting structure 425 to limit the rotation of the second transmission part 420 and the fourth transmission part 440. Exemplarily, the second limiting structure 150 may include two protrusions (such as Figure 8As shown in the figure, the first limiting structure 425 can be a channel provided on the second transmission part 420, and a channel provided on the fourth transmission part 440, and the first limiting structure 425 can be located between the two protrusions. By setting the first limiting structure 425 between the two protrusions, the second limiting structure 150 can limit the second transmission part 420 and the fourth transmission part 440 in the rotation direction of the rotating member 200, so as to limit the movement track of the second transmission part 420 and the fourth transmission part 440, and prevent the second transmission part 420 and the fourth transmission part 440 from rotating relative to the housing 100 with the rotation of the rotating member 200, causing the components connected to the fourth transmission part 440, such as the push member 424, to rotate in the inner cavity 130, and collide with other structural components in the inner cavity 130, thereby affecting the service life of the syringe positioning assembly. Among them, the first limiting structure 425 can also be a structure such as a protrusion or a groove provided on the second transmission part 420 or the fourth transmission part 440, and this is not limited in the present application.

[0085] The fixing process of the syringe positioning assembly to the syringe can generally include a lifting process, a hovering process and a clamping process. In other embodiments, the fixing process of the syringe to the syringe may not include a hovering process, or include more processes, which is not limited by the present application.

[0086] The lifting process can generally be as follows: rotating the handle 210 along the third direction A1, releasing the handle 210 and the bearing surface 110 (such as Figure 1 At this time, the first transmission part 410 moves from the first end 421a toward the second end 421b, the third transmission part 430 moves from the third end 441a toward the fourth end 441b, and the push member 424 moves toward the side close to the fixing member 300, until the first transmission part 410 moves to the second end 421b and / or the third transmission part 430 moves to the fourth end 441b, and the lifting process is regarded as ended.

[0087] The hovering process can usually be: the first transmission part 410 is located in the positioning groove 4211 at the second end 421b, and the positioning groove 4211 can limit the movement of the first transmission part 410. At this time, the space between the handle 210 and the bearing surface 110 is the largest, which is conducive to the smooth installation of the syringe into the syringe positioning assembly. The position of the handle 210 relative to the bearing surface 110 at this time is recorded as the maximum position of the handle 210, and the handle 210 is maintained at the maximum position relative to the bearing surface 110. After the syringe is loaded, the user can lightly push the handle 210 along the fourth direction A2, so that the first transmission part 410 is out of the positioning groove 4211, and the hovering process is regarded as over.

[0088] The clamping process can generally be as follows: the compression spring 710 provides a restoring deformation force, pushing the second transmission part 420 to move along the second direction X2, acting on the first transmission part 410, so that the first transmission part 410 moves from the second end 421b toward the first end 421a, thereby driving the first connecting shaft 220 to rotate along the fourth direction A2, so that the handle 210 rotates along the fourth direction A2, and the space between the handle 210 and the bearing surface 110 is reduced until the handle 210 contacts the barrel of the syringe, and the clamping process is considered to be completed. At this time, during the rotation of the handle 210 along the fourth direction A2, the fourth transmission part 440 will also move along the first direction X1, so that the distance between the abutting part 424a and the stop block 330 increases until they are separated, and the force of the abutting part 424a on the fixing member 300 along the first direction X1 is withdrawn, and the fixing sheet 310 will also move along the second direction X2 under the action of the restoring deformation force of the elastic ring 340, thereby realizing the clamping process of the syringe roll.

[0089] In the embodiment of the present application, by arranging the cooperation of various structural parts in the syringe positioning assembly during different working processes, the clamping process of the barrel and the curling edge of the syringe can be realized, which can effectively improve the fixing efficiency of the syringe positioning assembly for the syringe.

[0090] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A syringe positioning assembly, characterized in that: include: A housing having a bearing surface and a fixing surface; a rotating member, comprising a handle and a first connecting shaft connected to each other, wherein the first connecting shaft is rotatably disposed in the housing, the handle is located outside the housing, and the handle is configured to clamp the syringe on the bearing surface; A fixing member, movably connected to the shell, the fixing member comprises a fixing plate, the fixing plate is located outside the shell and opposite to the fixing surface; A transmission member connected to the first connecting shaft and the fixing member; when the handle is rotated away from the bearing surface, the rotating member drives the fixing plate to move away from the fixing surface through the transmission member; A compression spring is sleeved on the first connecting shaft, one end of the compression spring is connected to the first connecting shaft, and the other end of the compression spring is abutted against the transmission member, and the compression spring can push the transmission member to move axially.

2. The syringe positioning assembly according to claim 1, characterized in that The transmission member includes a first transmission part and a second transmission part that match each other. The first transmission part is fixed to the first connecting shaft, and the second transmission part is axially movably sleeved on the first connecting shaft. The second transmission part is provided with a guide groove, and the guide groove is a spiral structure. The first transmission part is embedded in the guide groove.

3. The syringe positioning assembly according to claim 2, characterized in that The second transmission part is also provided with a push member, which can move axially and is configured to push the fixing member to move the fixing sheet away from the fixing surface.

4. The syringe positioning assembly according to claim 2, characterized in that: The transmission member also includes a third transmission part and a fourth transmission part that match each other; the third transmission part is fixed to the first connecting shaft, the fourth transmission part is axially movable and sleeved on the first connecting shaft, the fourth transmission part is provided with a limit groove and a push-pull member, the limit groove is a spiral structure, and the third transmission part is embedded in the limit groove; the push-pull member is axially movable and is configured to push the fixing member to move the fixing plate away from the fixing surface; The fourth transmission part is spaced apart from the second transmission part, and the compression spring is located between the fourth transmission part and the second transmission part.

5. The syringe positioning assembly according to claim 3 or 4, characterized in that: The pushing member includes an abutting portion, the abutting portion is parallel to the first connecting axis, and the abutting portion is configured to push against the fixing member.

6. The syringe positioning assembly according to claim 4, characterized in that Along the axial direction of the first connecting shaft, the distance between the two ends of the limiting groove is greater than the distance between the two ends of the guiding groove.

7. The syringe positioning assembly according to claim 4, characterized in that: The guide groove has a first end and a second end, and the first end is closer to the fixing plate than the second end; the limiting groove has a third end and a fourth end, and the third end is closer to the fixing plate than the fourth end; When the handle is rotated to the maximum position, the first transmission part is located at the second end, the third transmission part is located at the fourth end, and the push member moves the fixing plate to the maximum displacement.

8. The syringe positioning assembly according to claim 7, characterized in that The second end is provided with a positioning groove; the positioning groove is configured to keep the handle at the maximum position when the first transmission part is located in the positioning groove.

9. The syringe positioning assembly according to claim 4, characterized in that: A positioning member is provided on the first connecting shaft, and the positioning member is located between the fourth transmission part and the second transmission part, and the two ends of the compression spring are respectively abutted against the positioning member and the second transmission part; a stop member is provided in the shell, and the positioning member is located between the stop member and the compression spring, and the stop member is configured to limit the axial position of the positioning member.

10. The syringe positioning assembly according to claim 4, characterized in that The second transmission part and the fourth transmission part are both provided with a first limiting structure, the housing is provided with a second limiting structure, and the second limiting structure cooperates with the first limiting structure to limit the rotation of the second transmission part and the fourth transmission part.

11. The syringe positioning assembly according to claim 1, characterized in that The syringe positioning assembly further includes a blocking member connected to the housing and located outside the housing, wherein the blocking member is configured to limit an opening angle of the handle.

12. The syringe positioning assembly according to claim 11, characterized in that The syringe positioning assembly further includes a sealing member, which is located in the housing and abuts against the housing, is sleeved on the first connecting shaft, and is connected to the blocking member.

13. The syringe positioning assembly according to claim 12, characterized in that The compression spring is located between the sealing member and the transmission member, and one end of the compression spring abuts against the sealing member.

14. The syringe positioning assembly according to claim 1, characterized in that The fixing member further comprises a second connecting shaft, one end of which is connected to the fixing plate, and the other end of which is movably disposed in the housing; The fixing member further includes a stop block, which is fixed to the end of the second connecting shaft and is located in the housing. The stop block is configured to limit the maximum distance of movement of the second connecting shaft in the axial direction of the second connecting shaft.

15. The syringe positioning assembly according to claim 14, characterized in that The fixing member also includes an elastic ring, which is sleeved on the second connecting shaft, one end of the elastic ring is connected to the shell, and the other end of the elastic ring is abutted against the stop block. The elastic ring can push the stop block to move axially along the second connecting shaft to drive the fixing plate to move toward the fixing surface.

16. The syringe positioning assembly according to claim 15, characterized in that There are two second connecting shafts, and the two second connecting shafts are connected to the fixing plate at intervals. There are also two elastic rings and two stop blocks, and the two second connecting shafts, the two elastic rings and the two stop blocks are arranged in one-to-one correspondence.

17. The syringe positioning assembly according to claim 14, characterized in that The fixing member further includes a paddle, and the syringe positioning assembly further includes a trigger switch, wherein the trigger switch is connected to the housing, the paddle is connected to the second connecting shaft, and the paddle is configured to move following the second connecting shaft to contact or separate from the trigger switch.

18. A syringe pump, characterized in that: Comprising a syringe positioning assembly as described in any one of claims 1-17.

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