Push rod cam type injection pump clamping handle device

Abstract

The utility model discloses a clamping handle device of a push rod cam type injection pump, which belongs to the technical field of medical equipment and comprises an injection pump middle plate, a push rod cam and a clamping handle, the clamping handle shaft is rotatably arranged on the injection pump middle plate, a cam part is arranged on the clamping handle shaft, and the cam part comprises a clamping handle shaft starting surface, a clamping handle shaft spiral surface and a stop groove; the clamping handle is rotatably arranged on the injection pump middle plate, and the clamping handle is connected with one end of the clamping handle shaft; the potentiometer is connected with one end, far away from the clamping handle, of the clamping handle shaft through a potentiometer shaft sleeve, and the potentiometer is fixed on the injection pump middle plate; the clamping handle shaft is sleeved with the spiral sliding block, the spiral sliding block can slide front and back along a middle plate of the injection pump, the spiral sliding block can rotate relative to the clamping handle shaft, one end of the spiral sliding block abuts against the cam, and the other end of the spiral sliding block abuts against the potentiometer shaft sleeve through an elastic element.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a push rod cam type injection pump handle clamping device. Background Art

[0002] The clamping handle device is a device used by the syringe pump to install and press the syringe tube onto the syringe pump. At present, the clamping handle devices of the syringe pump are mainly divided into the pull rod type and the rotary type. The pull rod type clamping handle device occupies a large space when pulled out, and the syringe pump door device and the pump body device need to reduce the space to avoid the clamping handle device, which is costly.

[0003] Most rotary clamping handle devices use a torsion spring clip structure or a pin sliding groove structure. The torsion spring clip structure has problems such as the torsion spring is easily damaged, the clamping life is insufficient, and it is easy to fail due to exceeding the elastic limit of the torsion spring. The assembly process of the pin sliding groove structure is complicated. During assembly, the transmission slider is compressed by a tool to stop the transmission slider's sliding groove when it is aligned with the pin hole of the clamping handle shaft. The assembly can only be installed by passing the pin. This pin sliding groove structure is easy to cause the pin to fall out during operation, and a pin blocking structure needs to be added, which increases the structural cost. In this structure, when the clamping handle shaft drives the pin to rotate in the sliding groove of the transmission slider, the compression spring is compressed to provide the elastic force for resetting the clamp. In this process, the pin, as a key force-bearing structural component, is subjected to the huge pressure of the entire component structure, and is prone to new bending and wear problems. In addition, the pin needs to be lubricated with high-pressure resistant grease, and the assembly process is cumbersome.

[0004] The existing rotary clamping handle device for injection pumps has many parts, the assembly process is complicated and cumbersome, the life of the pin shaft is insufficient, the smoothness decreases with the deformation and wear of the pin shaft, and it is easy to slip. The sliding groove on the transmission slide of this method is a double sliding groove around the center, which needs to be processed by a four-axis machine tool. The parts processing process is complicated and the processing cost is high. Utility Model Content

[0005] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a push rod cam type injection pump handle clamp device, which can improve structural reliability and service life and reduce production costs.

[0006] According to the embodiment of the utility model, the push rod cam type injection pump clamping handle device includes: an injection pump middle plate; a clamping handle shaft, which is rotatably arranged on the injection pump middle plate, and a cam portion is arranged on the clamping handle shaft, and the cam portion includes a clamping handle shaft starting surface, a clamping handle shaft spiral surface and a stop groove; a clamping handle, which is rotatably arranged on the injection pump middle plate, and the clamping handle is connected to one end of the clamping handle shaft; a potentiometer, which is connected to the end of the clamping handle shaft away from the clamping handle through a potentiometer sleeve, and the potentiometer is fixed on the injection pump middle plate; a spiral slider, which is sleeved on the clamping handle shaft, and the spiral slider can slide back and forth along the middle plate of the injection pump, and the spiral slider can rotate relative to the clamping handle shaft, one end of the spiral slider is against the cam, and the other end of the spiral slider is against the potentiometer sleeve through an elastic element.

[0007] According to the push rod cam type syringe pump clamp handle device of the embodiment of the utility model, at least the following beneficial effects are achieved: providing a syringe pump clamp handle device with small space, high reliability, stable performance, simple assembly, small number of parts, low difficulty in parts processing, and low cost. Compared with the existing rotary clamp handle device using a pin shaft sliding groove structure, the utility model uses a rotary clamp handle device with a spiral slider structure, which avoids the problem of uneven rotation of the clamp handle caused by pin shaft deformation, pin shaft oil film rupture, and uneven lubrication. Compared with the existing rotary clamp handle device using a pin shaft sliding groove structure, the assembly of the utility model is simple to install and can be easily assembled without the use of tooling. It has a small number of parts, low requirements for machine tools for parts processing, and low processing costs. The utility model uses a structure in which a spiral slider cooperates with the clamp handle rotating shaft, and its lifespan, reliability, and sliding smoothness are higher than those of the clamp handle device with a pin shaft sliding groove structure.

[0008] According to some embodiments of the utility model, the clamping handle shaft includes a rotating handle, a clamping handle hole is opened on the rotating handle, the clamping handle shaft includes a clamping handle connecting shaft, the clamping handle connecting shaft is passed through the clamping handle hole, and the clamping handle connecting shaft and the clamping handle hole are both provided with a flat structure to prevent rotation, so that the clamping handle shaft and the clamping handle rotate synchronously.

[0009] According to some embodiments of the present invention, the clamping handle includes an elastic pad, which is used to cushion the syringe when clamping the outer wall of the syringe.

[0010] According to some embodiments of the present invention, the clamp handle includes a buffer pad for preventing the clamp handle from making hard contact when the clamp handle is clamped onto the syringe pump.

[0011] According to some embodiments of the utility model, the clamping handle shaft includes a guide shaft, a spiral slider and an elastic element are sleeved on the guide shaft, a retaining ring is provided on the guide shaft, a clamping handle bracket is provided on the middle plate of the injection pump, and the retaining ring and the clamping handle bracket abut against each other to prevent the clamping handle shaft from sliding in the forward and backward directions.

[0012] According to some embodiments of the utility model, the clamping handle shaft includes a potentiometer connecting shaft, a fixing threaded hole is formed on the potentiometer connecting shaft, the potentiometer sleeve includes a clamping handle shaft connecting hole, a fixing hole is formed on the clamping handle shaft connecting hole, the potentiometer connecting shaft is passed through the clamping handle shaft connecting hole, and the clamping handle shaft and the potentiometer sleeve are fixed to each other by screwing screws into the fixing threaded hole and the fixing hole.

[0013] According to some embodiments of the utility model, a potentiometer shaft is provided on the potentiometer, a potentiometer docking shaft is provided on the potentiometer shaft, a potentiometer connecting hole is provided on the potentiometer sleeve, and the potentiometer docking shaft is passed through the potentiometer connecting hole, so that the potentiometer can identify the rotation angle of the clamping handle through the transmission of the potentiometer sleeve and the clamping handle shaft.

[0014] According to some embodiments of the utility model, a middle plate limiting groove is provided on the middle plate of the injection pump, a guide surface is provided on the spiral slider, and the guide surface is provided in the middle plate limiting groove.

[0015] According to some embodiments of the present invention, the spiral slider includes a slider starting surface, a slider spiral surface and a slider head.

[0016] According to some embodiments of the present utility model, the middle plate of the injection pump includes a potentiometer support, and the potentiometer support abuts against the potentiometer to limit the rotation of the potentiometer.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0019] Figure 1 It is a structural schematic diagram of a push rod cam type injection pump handle clamping device according to an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the exploded structure of the push rod cam type injection pump handle clamp device of the embodiment of the utility model;

[0021] Figure 3 It is a structural schematic diagram of a push rod cam type syringe pump clamping handle device of an embodiment of the utility model installed on a syringe pump middle plate;

[0022] Figure 4 It is a structural schematic diagram of a push rod cam type injection pump clamping handle device in an open state according to an embodiment of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the push rod cam type injection pump clamp handle device in the closing process of the embodiment of the utility model;

[0024] Figure 6 It is a schematic structural diagram of a push rod cam type injection pump clamping handle device in a fully closed state according to an embodiment of the utility model;

[0025] Figure 7 It is a schematic diagram of the clamping handle structure of the push rod cam type injection pump clamping handle device of the embodiment of the utility model;

[0026] Figure 8 It is a schematic diagram of the structure of the clamping handle shaft of the push rod cam type injection pump clamping handle device of the embodiment of the utility model;

[0027] Fig. 9 It is a schematic diagram of the spiral slider structure of the push rod cam type injection pump clamping handle device of the embodiment of the utility model;

[0028] Fig.10 It is a schematic diagram of the structure of the potentiometer sleeve of the push rod cam type injection pump clamping handle device of the embodiment of the utility model;

[0029] Fig.11 It is a schematic diagram of the potentiometer structure of the push rod cam type injection pump handle clamping device of the embodiment of the utility model;

[0030] Fig.12 This is a schematic diagram of the structure of the push rod cam type injection pump handle device of the utility model embodiment

[0031] Fig.13 It is a structural schematic diagram of a push rod cam type injection pump clamping handle device installed in an injection pump according to an embodiment of the utility model.

[0032] Reference numerals:

[0033] Clamping handle 10; elastic pad 11; buffer pad 12; clamping handle hole 13; rotating handle 14;

[0034] Clamping handle shaft 20; clamping handle connecting shaft 21; retaining ring 22; guide shaft 23; potentiometer connecting shaft 24; fixed threaded hole 25; clamping handle shaft starting surface 26; clamping handle shaft spiral surface 27; stop groove 28;

[0035] Helical slider 30; guide surface 31; slider starting surface 32; slider helical surface 33; sliding head 34;

[0036] Elastic element 40;

[0037] Potentiometer sleeve 50; potentiometer connection hole 51; clamping handle shaft connection hole 52; fixing hole 53;

[0038] Potentiometer 60; potentiometer shaft 61; potentiometer docking shaft 62;

[0039] Injection pump middle plate 70; clamp handle bracket 71; middle plate limit groove 73; potentiometer support 76. DETAILED DESCRIPTION

[0040] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0041] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0042] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0043] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0044] refer to Figures 1 to 13 The invention describes a push rod cam type syringe pump clamp handle device according to an embodiment of the present invention.

[0045] like Figures 1 to 13 As shown, the push rod cam type syringe pump clamping handle device of the embodiment of the utility model includes: a syringe pump middle plate 70; a clamping handle shaft 20, which is rotatably arranged on the syringe pump middle plate, and a cam portion is arranged on the clamping handle shaft 20, and the cam portion includes a clamping handle shaft starting surface 26, a clamping handle shaft spiral surface 27 and a stop groove 28; a clamping handle 10, which is rotatably arranged on the syringe pump middle plate 70, and the clamping handle 10 is connected to one end of the clamping handle shaft 20; a potentiometer 60, which is connected to the end of the clamping handle shaft 20 away from the clamping handle 10 through a potentiometer sleeve 50, and the potentiometer 60 is fixed on the syringe pump middle plate 70; a spiral slider 30, which is sleeved on the clamping handle shaft 20, and the spiral slider 30 can slide back and forth along the syringe pump middle plate 70, and the spiral slider 30 can rotate relative to the clamping handle shaft 20, one end of the spiral slider 30 is against the cam, and the other end of the spiral slider 30 is against the potentiometer sleeve 50 through an elastic element 40.

[0046] like Figures 1 to 13 As shown, the clamping handle shaft 20 includes a rotating handle 14, and a clamping handle hole 13 is opened on the rotating handle 14. The clamping handle shaft 20 includes a clamping handle connecting shaft 21, and the clamping handle connecting shaft 21 is inserted into the clamping handle hole 13. The clamping handle connecting shaft 21 and the clamping handle hole 13 are both provided with a flat position structure to prevent rotation, so that the clamping handle shaft 20 and the clamping handle 10 rotate synchronously. The clamping handle 10 includes an elastic pad 11, and the elastic pad 11 is used to cushion the syringe when clamping the outer wall of the syringe. The clamping handle 10 includes a buffer pad 12 to prevent the clamping handle 10 from hard contact when the clamping handle 10 is clamped on the injection pump. The clamping handle shaft 20 includes a guide shaft 23, and the spiral slider 30 and the elastic element 40 are sleeved on the guide shaft 23. The guide shaft 23 is provided with a retaining ring 22. The syringe pump middle plate 70 is provided with a clamping handle bracket 71, and the retaining ring 22 and the clamping handle bracket 71 are abutted against each other to prevent the clamping handle shaft 20 from sliding in the front-back direction. The clamping handle shaft 20 includes a potentiometer coupling shaft 24, a fixing threaded hole 25 is provided on the potentiometer coupling shaft 24, a potentiometer sleeve 50 includes a clamping handle shaft coupling hole 52, a fixing hole 53 is provided on the clamping handle shaft coupling hole 52, the potentiometer coupling shaft 24 is penetrated in the clamping handle shaft coupling hole 52, and screws are screwed into the fixing threaded hole 25 and the fixing hole 53 to fix the clamping handle shaft 20 and the potentiometer sleeve 50 to each other. The potentiometer 60 is provided with a potentiometer shaft 61, a potentiometer docking shaft 62 is provided on the potentiometer shaft 61, a potentiometer coupling hole 51 is provided on the potentiometer sleeve 50, and the potentiometer docking shaft 62 is penetrated in the potentiometer coupling hole 51, so that the potentiometer 60 can identify the rotation angle of the clamping handle 10 through the transmission of the potentiometer sleeve 50 and the clamping handle shaft 20. The injection pump middle plate 70 is provided with a middle plate limiting groove 73, and the spiral slider 30 is provided with a guide surface 31, and the guide surface 31 is provided in the middle plate limiting groove 73. The spiral slider 30 includes a slider starting surface 32, a slider spiral surface 33 and a slider head 34. The injection pump middle plate 70 includes a potentiometer support 76, which abuts against the potentiometer 60 to limit the rotation of the potentiometer 60.

[0047] like Figure 7 and Figure 8 As shown, the clamp handle 10 and the clamp handle shaft 20 are assembled into one piece by in-mold injection molding, ultrasonic welding, bonding or other assembly processes, and the clamp handle connecting shaft 21 is installed in the clamp handle hole 13. The clamp handle connecting shaft 21 and the clamp handle hole 13 are both provided with a flat structure to prevent rotation, so as to ensure that the clamp handle 10 and the clamp handle shaft 20 are installed into one piece, and the initial assembly angle is the same. When the clamp handle rotates, the clamp handle shaft will rotate with the clamp handle.

[0048] like Figure 8 and Fig. 9As shown, the central hole of the spiral slider 30 passes through the guide shaft 23 on the clamping handle shaft 20; at this time, the spiral slider 30 can rotate on the clamping handle shaft 20 or translate in the direction of the clamping handle shaft. The sliding head 34 on the spiral slider 30 abuts against the clamping handle shaft starting surface 26, the clamping handle shaft spiral surface 27, and the stop groove 28 on the clamping handle shaft 20 and moves freely. The sliding head 34 can slide along the clamping handle shaft starting surface of the clamping handle shaft 20, passing through the clamping handle shaft spiral surface 27, to the clamping handle shaft stop groove 28, and can also slide from the stop groove 28, passing through the clamping handle shaft spiral surface 27, to the clamping handle shaft starting surface 26.

[0049] The elastic element 40 is sleeved on the guide shaft 23 of the clamping handle shaft 20, and one end thereof presses against the spiral slider 30. The clamping handle shaft connection hole 52 on the potentiometer sleeve 50 is tightly sleeved on the potentiometer connection shaft 24 on the clamping handle shaft 20. In this process, the potentiometer sleeve 50 compresses the elastic element, and when the fixing hole 53 on the potentiometer sleeve 50 is aligned with the fixing threaded hole 25 on the clamping handle shaft 20, the locking bolt is installed to fix the potentiometer sleeve 50 and the clamping handle shaft 20 together, and the elastic element 40 is compressed between the potentiometer sleeve 50 and the spiral slider 30.

[0050] The potentiometer docking shaft 62 of the potentiometer 60 is tightly sleeved on the potentiometer connecting hole 51 on the potentiometer sleeve 50. The shaft holes of the potentiometer 60 and the potentiometer sleeve 50 are matched with a flat anti-rotation design so that the potentiometer 60 and the potentiometer sleeve 50 are assembled together at a fixed angle.

[0051] The clamping handle 10, the clamping handle shaft 20, the potentiometer sleeve 50, and the potentiometer 60 are assembled together and coaxially distributed in a straight line. Therefore, when the clamping handle 10 rotates, the potentiometer 60 will rotate by the same angle. The angle of rotation of the potentiometer 60 itself is the angle of rotation of the clamping handle 10.

[0052] When the syringe pump is used, the user places the syringe on the clamping groove of the syringe pump, and the clamping handle 10 clamps the syringe on the clamping groove of the syringe pump under the elastic force provided by the elastic element 40. Because the diameters of syringes of different specifications are different, the rotation angles of the clamping handle 10 when clamping are different, and the clamping angle of the clamping handle of the same specification syringe is fixed at a value with a small error. Therefore, the specification of the syringe clamped by the user can be identified by the rotation angle of the clamping handle 10 identified by the potentiometer 60, so as to assist the user in performing the infusion operation.

[0053] When the clamping handle device is installed on the middle plate 70 of the injection pump, the clamping handle bracket 71 and the sleeve support 74 support the clamping handle device. The clamping handle bracket 71 abuts against the retaining ring on the clamping handle shaft 20, and the sleeve retaining piece 75 abuts against the potentiometer sleeve 50, so that the clamping handle device is limited in the lateral direction between the clamping handle bracket 71 and the sleeve retaining piece 75. The guide surface 31 in the spiral slider 30 on the clamping handle device is engaged with the middle plate limit groove 73. At this time, the spiral slider 30 of the clamping handle device can only slide in the axial direction, but cannot rotate. The clamping handle 10, the clamping handle shaft 20, and the potentiometer sleeve 50 are connected as a whole and can only rotate, but cannot slide in the axial direction.

[0054] Under the clamping of the syringe pump middle plate 70, in the clamping handle device, when the clamping handle 10 rotates to leave space for the syringe installation, the clamping handle 10 drives the spiral surface on the clamping handle shaft 20, pushes the spiral slider 30 to slide in the middle plate limit groove, and compresses the elastic element 40. When the clamping handle is rotated to the maximum angle, the sliding head 34 on the spiral slider 30 is stuck on the stop groove 28 on the clamping handle shaft 20 to achieve the rotation angle locking. When the user places the syringe and presses the syringe with the clamping handle 10, the user only needs to slightly rotate the clamping handle 10 to make it pass the stop groove 28. The resilience of the elastic element 40 pushes the spiral slider 30, and the sliding head 34 pushes the spiral surface 27 of the clamping handle shaft, so that the clamping handle shaft 20 rotates, driving the clamping handle 10 to rotate, and the syringe is pressed.

[0055] The elastic pad 11 in the clamping handle 10 is used to cushion the syringe when clamping the outer wall of the syringe to prevent the elastic compression of the clamping handle from impacting and fracturing the outer wall of the syringe.

[0056] The buffer pad 12 in the clamp handle 10 is used to prevent the clamp handle from hard contact and impacting the syringe pump housing to cause abnormal noise when the clamp handle is clamped on the syringe pump, and is designed to provide a buffer to achieve soft contact.

[0057] The potentiometer support 76 has the function of supporting the potentiometer 60 so that the potentiometer cannot rotate in the radial direction.

[0058] The elastic element 40 of the clamping handle device may be in the form of, but not limited to, a compression spring, a spring, a butterfly spring, a wave spring, a hydraulic elastic device, a pneumatic elastic device, and the like.

[0059] The outer contour of the cam is alienated into multiple surfaces in different parts, the push rod is alienated into the flange structure of a certain part, and the elastic element is stacked on the outer surfaces of multiple parts in a set manner to achieve miniaturization of the clamping handle device.

[0060] The outer contour of the cam is set on the clamping handle shaft in the utility model, and the push rod structure is designed on the spiral slider. Under the same principle, the outer contour of the cam is designed on the spiral slider, the cam is designed on the clamping handle shaft, or the cam and the push rod are designed on the spiral slider and the clamping handle shaft at the same time, which should also be within the scope of patent protection of the utility model.

[0061] When using the push rod cam type syringe pump clamp handle device, the clamp handle is pressed, and the clamp handle drives the clamp handle shaft to rotate. The spiral surface on the clamp handle shaft pushes the spiral slider. Under the action of the syringe pump middle plate limiting rotation, the spiral slider slides and compresses the elastic element in the axial direction. When the clamp handle rotates to the maximum opening angle, the stop groove on the spiral surface on the clamp handle shaft covers the sliding head on the spiral slider to achieve locking; at this time, after the user installs the syringe, the clamp handle is pressed in the opposite direction, the clamp handle shaft rotates in the opposite direction, and the sliding head of the spiral slider comes out. At this time, the clamp handle is released. Under the action of the rebound force of the elastic element, the spiral slider pushes the spiral surface on the clamp handle shaft, driving the clamp handle shaft to rotate, so that the clamp handle automatically presses against the syringe to clamp.

[0062] The utility model provides a clamping handle device based on the principle structure of an elastic push rod cam, wherein the outer contour of the cam is alienated into multiple surfaces in different parts, the push rod is alienated into the flange structure of a certain part, and the elastic element is stacked on the outer surfaces of multiple parts in a set manner, thereby realizing the miniaturization of the clamping handle device.

[0063] The spiral surface, the starting surface and the stop groove of the clamping handle device represent the outer contour of the cam, and the sliding head and the elastic element represent the elastic push rod.

[0064] The utility model provides an injection pump clamp handle device with small space, high reliability, stable performance, simple assembly, small number of parts, low difficulty in parts processing, and low cost. Compared with the existing rotary clamp handle device using a pin shaft sliding groove structure, the utility model uses a rotary clamp handle device with a spiral slider structure, which avoids the problem of uneven rotation of the clamp handle caused by pin shaft deformation, pin shaft oil film rupture, and uneven lubrication. Compared with the existing rotary clamp handle device using a pin shaft sliding groove structure, the components of the utility model are simple to install and can be easily assembled without the use of tooling. The number of parts is small, the machine tool requirements for parts processing are low, and the processing cost is low. The utility model uses a structure in which a spiral slider cooperates with the clamp handle rotating shaft, and its life, reliability, and sliding smoothness are higher than those of the clamp handle device with a pin shaft sliding groove structure.

[0065] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A push rod cam type syringe pump handle clamp device, It is characterized in that include: Injection pump middle plate (70); A clamping handle shaft (20), the clamping handle shaft (20) is rotatably arranged on the middle plate of the injection pump, a cam portion is arranged on the clamping handle shaft (20), and the cam portion includes a clamping handle shaft starting surface (26), a clamping handle shaft spiral surface (27) and a stop groove (28); A clamping handle (10), the clamping handle (10) is rotatably disposed on the injection pump middle plate (70), and the clamping handle (10) is connected to one end of the clamping handle shaft (20); A potentiometer (60), the potentiometer (60) is connected to an end of the clamping handle shaft (20) away from the clamping handle (10) through a potentiometer sleeve (50), and the potentiometer (60) is fixed on the injection pump middle plate (70); The spiral slider (30) is sleeved on the clamping handle shaft (20), the spiral slider (30) can slide back and forth along the injection pump middle plate (70), the spiral slider (30) can rotate relative to the clamping handle shaft (20), one end of the spiral slider (30) is against the cam, and the other end of the spiral slider (30) is against the potentiometer shaft sleeve (50) through the elastic element (40).

2. The push rod cam type syringe pump handle clamp device according to claim 1, It is characterized in that The clamping handle shaft (20) comprises a rotating handle (14), a clamping handle hole (13) is formed on the rotating handle (14), the clamping handle shaft (20) comprises a clamping handle connecting shaft (21), the clamping handle connecting shaft (21) is passed through the clamping handle hole (13), and the clamping handle connecting shaft (21) and the clamping handle hole (13) are both provided with a flat position structure to prevent rotation, so that the clamping handle shaft (20) and the clamping handle (10) rotate synchronously.

3. The push rod cam type injection pump handle clamp device according to claim 1, It is characterized in that The clamping handle (10) comprises an elastic pad (11), and the elastic pad (11) is used to cushion the syringe when clamping the outer wall of the syringe.

4. The push rod cam type injection pump handle clamp device according to claim 1, It is characterized in that The clamp handle (10) includes a cushion (12) for preventing the clamp handle (10) from making hard contact when the clamp handle (10) is clamped onto the syringe pump.

5. The push rod cam type injection pump handle device according to claim 1, It is characterized in that The clamping handle shaft (20) includes a guide shaft (23), a spiral slider (30) and an elastic element (40) are sleeved on the guide shaft (23), a retaining ring (22) is arranged on the guide shaft (23), a clamping handle bracket (71) is arranged on the injection pump middle plate (70), and the retaining ring (22) and the clamping handle bracket (71) abut against each other to prevent the clamping handle shaft (20) from sliding in the front-back direction.

6. The push rod cam type syringe pump clamp handle device according to claim 1, It is characterized in that The clamping handle shaft (20) includes a potentiometer connecting shaft (24), a fixing threaded hole (25) is provided on the potentiometer connecting shaft (24), and the potentiometer sleeve (50) includes a clamping handle shaft connecting hole (52), a fixing hole (53) is provided on the clamping handle shaft connecting hole (52), and the potentiometer connecting shaft (24) is inserted into the clamping handle shaft connecting hole (52). By screwing screws into the fixing threaded hole (25) and the fixing hole (53), the clamping handle shaft (20) and the potentiometer sleeve (50) are fixed to each other.

7. The push rod cam type injection pump clamp handle device according to claim 1, It is characterized in that The potentiometer (60) is provided with a potentiometer shaft (61), the potentiometer shaft (61) is provided with a potentiometer docking shaft (62), the potentiometer shaft sleeve (50) is provided with a potentiometer connecting hole (51), the potentiometer docking shaft (62) is inserted into the potentiometer connecting hole (51), so that the potentiometer (60) can identify the rotation angle of the clamping handle (10) through the transmission of the potentiometer shaft sleeve (50) and the clamping handle shaft (20).

8. The push rod cam type syringe pump clamp handle device according to claim 1, It is characterized in that A middle plate limiting groove (73) is provided on the middle plate (70) of the injection pump, a guide surface (31) is provided on the spiral slider (30), and the guide surface (31) is arranged in the middle plate limiting groove (73).

9. The push rod cam type syringe pump clamp handle device according to claim 1, It is characterized in that The spiral slider (30) comprises a slider starting surface (32), a slider spiral surface (33) and a slider head (34).

10. The push rod cam type syringe pump clamp handle device according to claim 1, It is characterized in that The injection pump middle plate (70) includes a potentiometer support (76), and the potentiometer support (76) abuts against the potentiometer (60) to limit the rotation of the potentiometer (60).

Images