Injection pump

Abstract

The utility model discloses an injection pump, and belongs to the technical field of medical instruments. According to the technical scheme, a body is included, a sliding block assembly is arranged in the body in a sliding mode, the sliding block assembly comprises two half nuts and a lead screw, the half nuts and the lead screw can be in threaded connection, a manual push head is arranged on the body, the manual push head and the sliding block assembly are connected through a push-pull rod, and the two ends of the push-pull rod are fixedly connected with the manual push head and the sliding block assembly respectively. A rotating rod is sleeved with the push-pull rod, a limiting plate and a pressing plate are arranged on the manual push head, the limiting plate is fixedly arranged on the manual push head, one end of the pressing plate is hinged to the manual push head, one end of the rotating rod is fixedly connected with the hinged end of the pressing plate, and the other end of the rotating rod extends into the sliding block assembly to adjust the two half nuts. By means of the limiting plate and the pressing plate, the pressing plate can be directly pressed in the using process and stops rotating until the pressing plate abuts against the preset limiting plate, and the problem that the rotating angle is small or large due to manual experience judgment is not needed.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to a syringe pump. BACKGROUND

[0002] At present, most of the wards of the hospital are equipped with the syringe pump, and the syringe pump is an automatic injection device for intravenous infusion, generally adopts the screw nut transmission, and the linear movement of the nut pushes the piston of the syringe to inject the infusion, so that the high-precision, stable and pulsation-free liquid transmission is realized.

[0003] When different specifications of syringes or syringes with different single drug amounts of the same specification are installed on the syringe pump, the nut needs to be moved to the appropriate position according to the specifications of the syringe or the drug amount of the syringe to push the piston rod of the syringe to move for injection infusion, in the prior art, such as the patent application No.

[0004] But there are still some problems when moving the nut in the above-mentioned way: when the staff rotates the handle, it is often judged according to experience whether the angle of rotation reaches the separation state of the upper half nut and the lower half nut, and the phenomenon of not completely separated and unable to smoothly push and pull the sliding seat caused by too small rotation angle often occurs, or the phenomenon of the driving convex part and the lower card slot disengaged caused by too large rotation angle, when the driving convex part and the lower card slot disengage, the driving convex part needs to be rotated counterclockwise to reset and rotate again to separate the upper half nut and the lower half nut. UTILITY MODEL CONTENTS

[0005] The utility model provides a syringe pump that can quickly switch the position of the nut in view of the problems in the prior art, solves the problem that in the prior art, the angle of rotation needs to be judged according to experience whether it reaches the separation state of the upper half nut and the lower half nut, and further exists the problem that too small rotation angle leads to not completely separated and unable to smoothly push and pull the sliding seat, and too large rotation angle leads to the driving convex part and the lower card slot disengaged.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] The utility model provides an injection pump, including the body, the slider assembly is arranged in the body and slides, the slider assembly includes two half nuts and screw rod, both ends of screw rod are rotatably connected on the body, half nut and screw rod can be threadedly connected, the manual push head is arranged on the body, and the manual push head is connected between the slider assembly through the push -and -pull rod, both ends of push -and -pull rod are fixedly connected with the manual push head and the slider assembly respectively, the push -and -pull rod is sleeved with the rotating rod, the manual push head is provided with the limit board and the pressing plate, the limit board is fixedly arranged on the manual push head, one end of the pressing plate is hinged on the manual push head, one end of the rotating rod is fixedly connected with the hinged end of the pressing plate, the other end of the rotating rod is the adjusting end, the cross section of the adjusting end is symmetrical shape and non -circular, the adjusting end is inserted into the slider assembly and can adjust two half nuts, by the limit board and the pressing plate arranged, can directly press the pressing plate in the process of using, until the pressing plate and the preset limit board abut after stopping rotation, do not need artificial experience to judge the problem of causing the rotation angle to be small or big.

[0008] Preferably, the slider assembly further comprises a frame and a reset unit, the frame is provided with a pressure handle shaft, the pressure handle shaft is hingedly connected with an upper pressure handle and a lower pressure handle, the two half nuts are respectively arranged at one end of the upper pressure handle and the lower pressure handle away from the pressure handle shaft, the screw rod is arranged between the two half nuts, the reset unit can drive the upper pressure handle and the lower pressure handle to move the two half nuts towards the screw rod, the other end of the rotating rod is inserted between the upper pressure handle and the lower pressure handle, and the rotating rod is always in abutment with the upper pressure handle and the lower pressure handle. By arranging the upper pressure handle, the lower pressure handle and the reset unit, when manual adjustment of the position of the slider assembly is needed, manual rotation of the rotating rod can complete the disengagement of the upper pressure handle, the lower pressure handle and the screw rod, and when the adjustment is completed, manual reverse rotation of the rotating rod can realize automatic cooperation of the upper pressure handle, the lower pressure handle and the screw rod under the action of the reset unit.

[0009] Preferably, the part of the rotating rod inserted between the upper pressure handle and the lower pressure handle is the adjusting end, and the cross section of the adjusting end is symmetrical and non-circular. By setting the shape of the adjusting end as symmetrical and non-circular, the upper pressure handle and the lower pressure handle can be synchronously pushed during rotation, realizing synchronous disengagement and cooperation between the upper pressure handle, the lower pressure handle and the screw rod.

[0010] Preferably, the upper end of the upper pressure handle and the lower end of the lower pressure handle are both provided with a containing groove, and the adjusting end is placed in the containing groove.

[0011] Preferably, the body is internally provided with a guide rod, and the frame is provided with a guide hole matched with the guide rod.

[0012] Preferably, the reset unit comprises two springs and two cover plates arranged symmetrically in the vertical direction, the cover plates are fixedly arranged on the frame, and the springs are arranged between the upper cover plate and the upper pressure handle and between the lower cover plate and the lower pressure handle.

[0013] Preferably, the injection pump further comprises a transmission assembly arranged on the body and connected with the screw rod.

[0014] Preferably, the transmission assembly comprises a stepping motor arranged on the body, a motor gear fixed to an output shaft of the motor, a high-speed end of a speed reduction gear set engaged with the motor gear, and a low-speed end of the speed reduction gear set connected with the screw rod.

[0015] Preferably, the manual push head is further provided with fixed clamping plates, the fixed clamping plates are symmetrically arranged, one end of the fixed clamping plates is hingedly connected to the manual push head through a clamping plate shaft, the manual push head is further provided with a linkage assembly, one end of the linkage assembly is connected to the rotating rod, and the other end of the linkage assembly is connected to the clamping plate shaft, and the fixed clamping plates can clamp the injection handle of the syringe.

[0016] The above technical scheme can be seen, the advantages of the present application are: through the setting of the limiting plate and the pressing plate, the pressing plate can be directly pressed during use, and the rotation is stopped after the pressing plate abuts against the preset limiting plate, without manual experience to determine the small or large rotation angle. Through the setting of the upper pressing handle, the lower pressing handle and the reset unit, when the position of the sliding block assembly needs to be manually adjusted, the upper pressing handle, the lower pressing handle and the screw rod can be separated by manually rotating the rotating rod, and when the adjustment is completed, the upper pressing handle, the lower pressing handle and the screw rod can be automatically matched by manually reversing the rotating rod under the action of the reset unit. By setting the shape of the adjusting end as a symmetrical shape and a non-circular shape, the upper pressing handle and the lower pressing handle can be synchronously pushed during rotation, realizing the synchronous separation and cooperation between the upper pressing handle, the lower pressing handle and the screw rod. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the present application, the following will briefly introduce the drawings needed to be used in the description, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Figure 1 Structure diagram of the embodiment of the specific embodiment of the present application Figure One .

[0019] Figure 2 Structure diagram of the embodiment of the specific embodiment of the present application Figure Two .

[0020] Figure 3 Explosion structure diagram of the embodiment of the specific embodiment of the present application.

[0021] Figure 4 Explosion structure diagram of the sliding block assembly of the embodiment of the specific embodiment of the present application.

[0022] Figure 5 Nut and screw cooperation diagram of the embodiment of the specific embodiment of the present application.

[0023] Figure 6 The utility model discloses concrete implementation mode nut, screw rod separation schematic diagram.

[0024] In the drawing: 1, main body, 2, half nut, 3, screw rod, 4, hand push head, 5, push-pull rod, 6, rotating rod, 7, limiting plate, 8, pressing plate, 9, frame, 10, pressing handle shaft, 11, upper pressing handle, 12, lower pressing handle, 13, adjusting end, 14, accommodating groove, 15, guide rod, 16, guide hole, 17, spring, 18, cover plate, 19, step motor, 20, motor gear, 21, speed reduction gear set, 22, fixed clamping plate, 23, thin film type potentiometer, 24, top head, 25, top cover. CONCRETE EMBODIMENT

[0025] In order to make the purpose, feature, advantage of the utility model more obvious and easy to understand, the technical scheme in the utility model will be described clearly and completely in the following by combining the drawings in the embodiment, obviously, the following described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the patent, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of the patent protection.

[0026] EMBODIMENT

[0027] As Figures 1-6As shown, an injection pump comprises a body 1, a slider assembly is slidably arranged in the body 1, the slider assembly comprises two half nuts 2 and a lead screw 3, both ends of the lead screw 3 are rotatably connected to the body 1, the half nuts 2 and the lead screw 3 can be threadedly connected, a manual push head 4 is arranged on the body 1, the manual push head 4 and the slider assembly are connected through a push-pull rod 5, both ends of the push-pull rod 5 are fixedly connected with the manual push head 4 and the slider assembly respectively, a rotating rod 6 is sleeved in the push-pull rod 5, a limiting plate 7 and a pressing plate 8 are arranged on the manual push head 4, a torsion spring is arranged between the limiting plate 7 and the pressing plate 8, the limiting plate 7 is fixedly arranged on the manual push head 4, one end of the pressing plate 8 is hingedly connected to the manual push head 4, one end of the rotating rod 6 is fixedly connected to the hinged end of the pressing plate 8, the other end of the rotating rod 6 extends into the slider assembly and can adjust the two half nuts 2, the injection pump further comprises a transmission assembly, the transmission assembly is arranged on the body 1, the transmission assembly is connected with the lead screw 3, the transmission assembly comprises a stepping motor 19 arranged on the body 1, a motor gear 20 is fixedly connected to the motor output shaft, the motor gear 20 is meshingly connected with the high-speed end of a speed reduction gear set 21, the low-speed end of the speed reduction gear set 21 is connected with the lead screw 3, a fixed clamping plate 22 is further arranged on the manual push head 4, the fixed clamping plate 22 is symmetrically arranged in two, one end of the fixed clamping plate 22 is hingedly connected to the manual push head 4 through a clamping plate shaft, a linkage assembly is further arranged in the manual push head 4, one end of the linkage assembly is connected with the rotating rod 6, the other end of the linkage assembly is connected with the clamping plate shaft, in this embodiment, the linkage assembly can be a gear set transmission, a gear-rack-gear transmission, etc., and will not be described in detail, the fixed clamping plate 22 can clamp the injection handle of a syringe, in this way, through the limiting plate 7 and the pressing plate 8 arranged, the pressing plate 8 can be directly pressed during use until the pressing plate 8 abuts against the pre-set limiting plate 7 to stop rotating, without manually judging the problem of smaller or larger rotating angle according to experience.

[0028] A film-type potentiometer 23 is arranged on the body 1, a top head 24 and a top cover 25 are arranged on the frame 9, the top cover 25 fixedly arranges the top head 24 on the frame 9, and the top head 24 passes through the hole cover and contacts the film-type potentiometer 23.

[0029] In the embodiment, the slider assembly further comprises a frame 9 and a reset unit, the frame 9 is provided with a pressure handle shaft 10, the upper pressure handle 11 and the lower pressure handle 12 are hinged on the pressure handle shaft 10, the two half nuts 2 are respectively arranged at the ends of the upper pressure handle 11 and the lower pressure handle 12 away from the pressure handle shaft 10, the screw rod 3 is arranged between the two half nuts 2, the reset unit can drive the upper pressure handle 11 and the lower pressure handle 12 to move the two half nuts 2 to the screw rod 3, the other end of the rotating rod 6 extends into the space between the upper pressure handle 11 and the lower pressure handle 12, and the rotating rod 6 always abuts against the upper pressure handle 11 and the lower pressure handle 12, the body 1 is internally provided with a guide rod 15, the frame 9 is provided with a guide hole 16 matched with the guide rod 15, the reset unit comprises two springs 17 and two cover plates 18 symmetrically arranged in the vertical direction, the cover plates 18 are fixedly arranged on the frame 9, and the springs 17 are arranged between the upper cover plate 18 and the upper pressure handle 11 and between the lower cover plate 18 and the lower pressure handle 12. In this way, by arranging the upper pressure handle 11, the lower pressure handle 12 and the reset unit, when it is necessary to manually adjust the position of the slider assembly, the upper pressure handle 11, the lower pressure handle 12 and the screw rod 3 can be separated by manually rotating the rotating rod 6, and when the adjustment is completed, the upper pressure handle 11, the lower pressure handle 12 and the screw rod 3 can be automatically matched by reversely rotating the rotating rod 6 under the action of the reset unit.

[0030] In the embodiment, the part of the rotating rod 6 extending into the space between the upper pressure handle 11 and the lower pressure handle is an adjusting end 13, the cross section of the adjusting end 13 is symmetrically shaped and non-circular, and in the embodiment, the cross section of the adjusting end 13 is in the shape of a waist, the lower end of the upper pressure handle 11 and the upper end of the lower pressure handle 12 are both provided with a containing groove 14, and the adjusting end 13 is placed in the containing groove 14. In this way, by arranging the adjusting end 13 in a symmetrically shaped and non-circular shape, the upper pressure handle 11 and the lower pressure handle 12 can be synchronously pushed when the adjusting end 13 is rotated, so as to realize the synchronous separation and cooperation between the upper pressure handle 11, the lower pressure handle 12 and the screw rod 3.

[0031] The working principle of the embodiment is as follows: in the working process, the stepper motor 19 rotates, the rotation is transmitted to the lead screw 3 through the motor gear 20 and the speed reduction gear set 21, the lead screw 3 rotates, and the two half nuts 2 are always threadedly connected with the lead screw 3 under the action of the spring 17 and the cover plate 18; at this time, the lead screw 3 rotates, the slider assembly is moved, the slider assembly pulls the push-pull rod 5 to drive the manual push head 4 to move, at this time, the manual push head 4 pushes the syringe to complete the preset injection work; when the syringe model, capacity and the like need to be replaced, the staff presses the pressing plate 8 to the state of abutting against the limiting plate 7, at this time, the pressing plate 8 drives the rotating rod 6 to rotate, the pressing plate 8 drives the fixed clamping plate 22 to rotate, the adjusting end 13 at the other end of the rotating rod 6 rotates, so as to exert force on the upper pressing handle 11 and the lower pressing handle 12, the upper pressing handle 11 rotates upward along the pressing handle shaft 10, the lower pressing handle 12 rotates downward along the pressing handle shaft 10, the half nuts 2 on the upper pressing handle 11 and the lower pressing handle 12 are synchronously separated from the lead screw 3, at this time, the push-pull manual push head 4 is pressed, the fixed clamping plate 22 is aligned with the syringe handle to be installed, the pressing plate 8 is loosened, the pressing plate 8 is reset under the action of the torsional spring, the fixed clamping plate 22 clamps the syringe handle to realize the connection with the syringe, the rotating rod 6 reverses, the upper pressing plate 8 is lowered and the lower pressing plate 8 is raised under the action of the spring 17 and the cover plate 18, at this time, the two half nuts 2 are engaged with the lead screw 3, and the replacement of the syringe is completed.

[0032] The above description of disclosed embodiments enables one skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An injection pump comprising a body (1) in which a slider assembly is slidingly arranged, characterized in that, The slider assembly comprises two half nuts (2) and a screw rod (3), both ends of the screw rod (3) are rotatably connected to a body (1), the half nuts (2) and the screw rod (3) are threadedly connected, the body (1) is provided with a manual push head (4), the manual push head (4) and the slider assembly are connected through a push-pull rod (5), both ends of the push-pull rod (5) are fixedly connected with the manual push head (4) and the slider assembly respectively, a rotating rod (6) is sleeved in the push-pull rod (5), the manual push head (4) is provided with a limiting plate (7) and a pressing plate (8), the limiting plate (7) is fixedly arranged on the manual push head (4), one end of the pressing plate (8) is hingedly connected to the manual push head (4), one end of the rotating rod (6) is fixedly connected with the hinged end of the pressing plate (8), the other end of the rotating rod (6) is an adjusting end (13), the cross section of the adjusting end (13) is symmetrical and non-circular, the adjusting end (13) extends into the slider assembly to adjust the two half nuts (2).

2. The syringe pump of claim 1, wherein, The slider assembly further comprises a frame (9) and a reset unit, the frame (9) is provided with a pressing handle shaft (10), the pressing handle shaft (10) is hingedly connected with an upper pressing handle (11) and a lower pressing handle (12), the two half nuts (2) are respectively arranged at one end of the upper pressing handle (11) and the lower pressing handle (12) away from the pressing handle shaft (10), the screw rod (3) is arranged between the two half nuts (2), the reset unit can drive the upper pressing handle (11) and the lower pressing handle (12) to move the two half nuts (2) towards the screw rod (3), the other end of the rotating rod (6) extends into the upper pressing handle (11) and the lower pressing handle (12), and the rotating rod (6) is always in abutment with the upper pressing handle (11) and the lower pressing handle (12).

3. The syringe pump of claim 2, wherein, The upper end of the upper pressing handle (11) and the lower end of the lower pressing handle (12) are both provided with a containing groove (14), and the adjusting end (13) is placed in the containing groove (14).

4. The syringe pump of claim 2, wherein, The body (1) is internally provided with a guide rod (15), and the frame (9) is provided with a guide hole (16) matched with the guide rod (15).

5. The syringe pump of claim 2, wherein, The reset unit comprises two springs (17) and two cover plates (18) arranged symmetrically in the vertical direction, the cover plates (18) are fixedly arranged on the frame (9), and the springs (17) are arranged between the upper cover plate (18) and the upper pressing handle (11) and between the lower cover plate (18) and the lower pressing handle (12).

6. The syringe pump of any one of claims 1-5, wherein, The injection pump further comprises a transmission assembly arranged on the body (1), and the transmission assembly is connected with the screw rod (3).

7. The syringe pump of claim 6, wherein, The transmission assembly comprises a stepping motor (19) arranged on the body (1), a motor gear (20) fixedly connected with a motor output shaft of the stepping motor (19), a high-speed end of a speed reduction gear set (21) meshingly connected with the motor gear (20), and a low-speed end of the speed reduction gear set (21) connected with the screw rod (3).

8. The syringe pump of claim 2, wherein, The manual push head (4) is further provided with fixed clamping plates (22), the fixed clamping plates (22) are symmetrically arranged, one end of the fixed clamping plates (22) is hingedly connected to the manual push head (4) through a clamping plate shaft, the manual push head (4) is further provided with a linkage assembly, one end of the linkage assembly is connected with the rotating rod (6), the other end of the linkage assembly is connected with the clamping plate shaft, and the fixed clamping plates (22) can clamp the injection handle of the syringe.

9. The syringe pump of claim 2, wherein, The body (1) is provided with a thin film potentiometer (23), the frame (9) is provided with a top head (24) and a top cover (25), the top cover (25) is fixedly arranged on the frame (9), and the top head (24) is in contact with the thin film potentiometer (23) through the hole head cover.

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