CN2259182Y

CN2259182Y - Medical liquid metering device for injection pump

Info

Publication number: CN2259182Y
Application number: CN 96218251
Authority: CN
Inventors: 王国林
Original assignee: Suzhou Medical College
Current assignee: Suzhou Medical College
Priority date: 1996-08-27
Filing date: 1996-08-27
Publication date: 1997-08-13
Anticipated expiration: 2006-08-27

Abstract

The utility model discloses a medical liquid metering device for a medical remote-controlled automatic injection pump, comprising a stepping motor and a pulse counting unit. The utility model is characterized in that a shaft of the stepping motor is provided with a metering disc provided with at least one light penetrating hole, and the position corresponding to the light penetrating hole is provided with a photoelectric coupler. When the metering disc is rotated, photoelectric pulses are produced by the photoelectric coupler, and rotary circle numbers of the motor are correspondingly changed to injection or reset metering numbers of an injection pump by the counting of the pulse counting unit. The utility model has the advantages of accurate metering, easy observation, simple structure, convenient use, etc.

Description

A kind of syringe pump medicinal liquid metering device

This utility model belongs to the Medical Instruments technical field, exactly is a kind of syringe pump medicinal liquid metering device.

Prior art ZL92223337.3 has provided the automatic syringe pump of a kind of medical distant control, its injection volume metering section is installed on the syringe pump, so the compartment operator are difficult for observing variable, and its injection volume is to represent with the bright display lamp of every injection human body 10ml medicinal liquid, error in dipping is bigger, influences quality of diagnosis.

But the purpose of this utility model is to provide a kind of accurate measurement, equal syringe pump medicinal liquid metering device of clear view variable in scanning room and control room.

The purpose of this utility model is achieved through the following technical solutions, comprise motor and step-by-step counting unit, it is characterized in that said motor the axle on the metering disk that has a loophole at least is installed, be provided with photoelectrical coupler with the corresponding position of metering disk, the outfan while of photoelectrical coupler links with the unitary input of step-by-step counting on control station and the syringe pump, and the unitary outfan of step-by-step counting is respectively equipped with injection volume display and the amount of resetting display on control station and the syringe pump.

This utility model is owing to adopted the method for luminous point counting to carry out the metering of the injection volume and the amount of resetting, and on the syringe pump of the control station in control room and scanning room, be equipped with metering display, therefore have accurate measurement, can clearly observe variable and advantage such as simple in structure, easy to use in any operating position.

This utility model has following accompanying drawing:

Fig. 1 injecting pump structure sketch map

Fig. 2 step-by-step counting cell schematics

Fig. 3 step-by-step counting cell schematics

The automatic syringe pump sketch map of Fig. 4

Fig. 5 metering disk front view

Below in conjunction with accompanying drawing this utility model is elaborated.

Fig. 1 is the injecting pump structure sketch map, and its machine power is provided by motor 11, drives leading screw 15 rotations through small belt pulley 12, belt 16 and big belt pulley 13.Leading screw 15 two ends are supported by bearing 17,18, nut 20 is installed on the screw mandrel 15, the outside is set with the operation sleeve 19 and the pump housing 14 successively, the outer ring secure fit of the left end of the pump housing 14 and bearing 17, the left end of sleeve 19 and nut 20 secure fit, the outer ring clearance fit of the right-hand member of sleeve 19 and bearing 18.The rotation of leading screw 15 make nut 20 and the operation sleeve 19 that is fixed as one with it along locating slot 30 moving linearlies, the plunger motion of the syringe 22 on the right-hand member of the sleeve 19 promotion punch block holder 21 is injected medicinal liquid and is examined in patient's body.When medicinal liquid has been injected, the operation that resets, motor 11 reverses, and work process is just in time opposite with said process.For the injection volume and the amount of resetting being measured accurately and clearly illustrating that this utility model has provided a kind of luminous point counting assembly.On the axle of motor 11, metering disk 27 is installed, have at least one loophole 29 on the metering disk, be provided with photoelectrical coupler 28 with metering disk 27 corresponding positions, for example photoelectrical coupler can be installed on the support 32 as the supporter of syringe pump assembly, the luminescent device of photoelectrical coupler 28 and sensitive device lay respectively at the both sides of metering disk 27.When the loophole 29 when motor rotates on the metering disk passed through luminous point enumerator photoelectrical couplers 28, the light that the light emitting diode of photoelectrical coupler 28 sends shone on the sensitive device of photoelectrical coupler 28 by loophole 29, and produces count pulse.When offering a loophole, the corresponding motor 11 of each electric pulse rotates a circle; When offering two loopholes, the corresponding motor of per two pulses rotates a circle; When offering two above loopholes, the printing opacity hole count is exactly a corresponding umber of pulse of one week of expression motor rotation.The printing opacity hole count can be 2,3,4,5,6 or more, and Fig. 5 is metering disk 27 sketch maps of offering four loopholes 29, for two or more loopholes, with along metering disk circumference uniform distribution for well.

The outfan of photoelectrical coupler 28 simultaneously with control station 1 and syringe pump 2 on the unitary input CP of step-by-step counting link, on control station and the syringe pump the unitary outfan of step-by-step counting be respectively equipped with injection volume display 6 and the amount of resetting display 9 (can be referring to Fig. 2～Fig. 4).

Fig. 2, Fig. 3 are the step-by-step counting cell schematics, and they can design by prior art, and wherein the counting unit of Fig. 2 is installed on the control station 1, and the counting unit of Fig. 3 is installed on the syringe pump 2.The step-by-step counting unit mainly is made up of IC 1～IC6, and wherein IC1～IC4 is the counting display unit, and its outfan is connected with injection volume respectively and shows that the charactron 6 and the amount of resetting show charactron 9; IC5～IC6 is that the injection volume/amount of resetting metering units is selected, and all can adopt prior art design.This unitary work process is as follows: (its model can adopt GK122 to the loophole 29 on metering disk 27 through photoelectrical coupler PH3, referring to Fig. 3) time, because of being subjected to rayed, the N end of photoelectrical coupler PH3 produces count pulse, after IC 9:F/E Schmidt circuit (its model can adopt CD40106) shaping, the IC 5:D/C (can adopt CD4011) of control station part (Fig. 2) and the IC 5:D/C (can adopt CD4011) of pump housing part (Fig. 3) are delivered in the CP pulse of generation simultaneously.When injecting operation, electrical switch IC6:A (can adopt CD4066) conducting, make forward-backward counter IC4 (its model can the adopt CD40192) counting that subtracts, medicinal liquid in the expression syringe reduces gradually, observed minimizing value is the dose that pushes human body, reduce at 0 o'clock, the expression medicinal liquid all injects human body.When resetting operation, IC 6:B (can adopt CD4066) conducting, forward-backward counter IC4 does additive operation, the number of charactron 6,9 increases gradually, when being increased to 60ml or 100ml, expression resets and finishes, and reading is at this moment promptly represented the injection volume next time injected.When design, can be the volume of syringe 22 with the umber of pulse equivalent of luminous point enumerator 28 outputs, like this, when resetting operation and injection operation, the show value of charactron 9 and 6 (can adopt D5202) just can be regarded the liquid absorption ml value of syringe 22 as and inject the dose ml value of human body.For example, select BF005-I type motor for use, 1.5 ° of step angles, drivewheel 12 is 1/2 with driven pulley 13 diameters ratio, to the both-end threaded screw rod of pitch 8mm, design for four loopholes, the every half-twist of motor, syringe can inject the 1ml medicinal liquid, and its corresponding thrust is 20 kilograms, injection rate is 3ml/s, can satisfy the requirement that fast injection is carried out the CT diagnosis fully.At this moment 0～100 reading of charactron 6,9 is just in time corresponding to 0～100ml, very convenient to use.

This utility model both can be used for foregoing syringe pump assembly, also can be used for existing centering type and promoted injecting pump structure, and its protection domain is not subjected to the restriction of matching component, and is only limited by claims of the present utility model.

Claims

1. syringe pump medicinal liquid metering device, comprise motor (11) and step-by-step counting unit, it is characterized in that said motor (11) the axle on the metering disk (27) that has a loophole (29) at least is installed, be provided with photoelectrical coupler (28) with the corresponding position of metering disk (27), the outfan while of photoelectrical coupler (28) links with the unitary input CP of step-by-step counting on control station and the syringe pump, and the unitary outfan of step-by-step counting is respectively equipped with injection volume display (6) and the amount of resetting display (9) on control station and the syringe pump.

2. metering device according to claim 1 is characterized in that said loophole (29) has two at least, and along metering disk (27) circumference uniform distribution.