CN2248070Y - Medical injector - Google Patents

Abstract

The utility model relates to a medical injector. The utility model is composed of an inner casing and an outer casing of an injector, a stepping motor, a ball screw rod, a piston joint of an injection needle cylinder and a needle cylinder. An injector piston is directly pushed by the stepping motor without passing a speed reducing device, and transmission efficiency and injection accuracy are improved. The piston joint of the injection needle cylinder can be connected with needle cylinders with different capacities so that CT reinforcing requirements of adults and children are satisfied. The pressure protecting aspect is provided with a section pressure protecting measure, and injection safety is ensured. The utility model has the advantages of simple structure and low cost. The utility model is used for the injection of reinforcing agents during CT reinforcing scan, and can also be used for the therapy of intervention radiation, angiography and arterial infusion. The utility model is a novel medical auxiliary device.

Description

A kind of injector for medical purpose

This utility model belongs to the medical injection utensil, the special syringe of injection reinforcing agent when especially relating to a kind of CT of being used for enhanced ct scans.

The capacity of used syringe can not satisfy adult and child's needs simultaneously when CT strengthened injection at present, and the transmission efficiency and the injection precision of syringe do not reach requirement, and the cost height can not satisfy the enhanced requirement of CT.

The purpose of this utility model is to provide a kind of transmission efficiency and precision height, and the CT of applied range strengthens syringe.

Technical solution of the present utility model is achieved in that it is by motor that CT of the present utility model strengthens syringe, the syringe inside and outside shell, ball screw, syringe cylinder piston joint and syringe are formed, it is characterized in that: motor is connected by flexible clutch and ball screw are coaxial, in case the vibration of motor reaches ball screw, pressure-sensitive crystal is installed between syringe cylinder piston joint and the ball screw, the front side of syringe piston joint is provided with the syringe that public parallel socket groove is used to connect different capabilities, the variation of pressure-sensitive crystal signal is delivered to computer to measure fluid pressure by pressure-sensitive signal amplifier during injection, on the inner wall of syringe, fix a swept resistance, current potential on the sliding contact is connected to the swept resistance buffer by the swept resistance lead-out wire, when moving, ball screw drives the contact motion, by the variation of dose in the change calculations syringe cylinder of measuring resistance.

This utility model is simple in structure; cost is low; motor has improved transmission efficiency and injection precision without the direct pushing syringe piston of deceleration device, and syringe adapter can connect the syringe of different capabilities; adult and the enhanced needs of child CT have been satisfied; aspect pressure protect, designed the measure of segmentation pressure protect, guaranteed injection safety, injection reinforcing agent when this product not only is used for the CT enhanced ct scans; also can be used for intervention radiation and angiography, is a kind of novel medical auxiliary equipment.

Accompanying drawing 1 is a structural representation of the present utility model.

Accompanying drawing 2 is left views of accompanying drawing 1.

Accompanying drawing 3 is A, B syringe vertical section structure sketch map.

Below in conjunction with drawings and Examples this utility model is explained in detail.

Referring to accompanying drawing 1, a kind of by syringe shell 1, syringe inner shell 2, motor 3, ball screw 4, syringe cylinder piston joint 5, pressure-sensitive signal amplifier 6, pressure-sensitive crystal lead-out wire 7, flexible clutch 8, swept resistance buffer 9, swept resistance lead-out wire 10, swept resistance 11, pressure-sensitive crystal 12, shockproof pad 13 and injector syringe (14,15) etc. the CT that partly forms strengthens syringe, motor 3 arrives by screw attachment with syringe shell 1, the shockproof pad 13 of the fixedly employing of motor 3, the effect of this pad can reduce sound and reach complete machine, motor 3 is by flexible clutch 8 and 4 coaxial connections of ball screw, in case the vibration of motor reaches ball screw, adopt dowel fixes between flexible clutch 8 and the diaxon.

When human body is injected; to different parts; different rates all has different injection pressures; but it is very dangerous (blocking) hypertonia as syringe needle under something unexpected happened; so designed the measure of segmentation pressure protect; concrete enforcement is: with pressure-sensitive crystal sampling; this pressure-sensitive crystal 12 is installed between syringe cylinder piston joint 5 and the ball screw 4 and is bonded in the screw mandrel outer cylinder front end; be right after with " plug-in type " syringe cylinder piston joint; one fixing cushion rubber is arranged around the pressure-sensitive crystal; pressure-sensitive crystal lead-out wire 7 one ends are connected to the outer tube rear end of screw mandrel; pressure-sensitive crystal lead-out wire 7 other ends are connected to pressure-sensitive signal amplifier 6; during injection, the variation of pressure-sensitive crystal signal is delivered to computer to measure fluid pressure by pressure-sensitive signal amplifier.

For the duty of determining motor (just change--injection; Counter-rotating--resorption) and the tram of propelling piston, guarantee the correct of injection measurement and the danger that can not cause because of " fault ", adopted mechanical means to arrange swept resistance 11 along axis direction at the housing inner core, its specific implementation method is: use a wire resistor, effective length 120mm (screw mandrel advances and is slightly less than 120mm), be fixed on the syringe inner wall, sliding contact and push rod interlock, current potential on the sliding contact is connected to swept resistance buffer 9 by swept resistance lead-out wire 10, when moving, ball screw drives the contact motion, by the variation of measuring resistance, calculate the variation and the demonstration of dose in the syringe cylinder by the control system single-chip microcomputer.

This utility model can connect the syringe of two kinds of (or multiple) different capabilities, the invention process two kinds of syringes of A, B (can be equipped with various syringes) according to different requirement design, A tube capacity is 200ml, the withstand voltage 4kg/cm of barrel ², the capacity of B tube is 100ml, the withstand voltage 8kg/cm of barrel ²(band shell), the A tube is contained in CT respectively with the B tube to be strengthened in the parallel socket groove of the syringe cylinder piston joint front side on the syringe, this syringe just can use the syringe of these two kinds of difference in functionalitys respectively, make the CT of function singleness strengthen syringe on original basis, improved about 1 times of injection speed and pressure, preserve original CT enhancement function, and can doublely do intervention radiation and general angiography.Accompanying drawing 2 is left views of accompanying drawing 1, a side is provided with public parallel socket groove (5.1) in the front portion of syringe cylinder piston joint (5), socket groove (5.1) comprises fixedly socket groove (5.3) of piston push rod socket groove (5.2) and A, B syringe, when piston push rod during in original position, when as long as the patch plug of the patch plug of syringe root and cylinder piston and the physical dimension of the forward socket groove of syringe cylinder piston (5.1) are coincide, can parallel insertion.

Accompanying drawing 3 is A, B syringe vertical section structure sketch map, as shown in Figure 3, the A syringe is made up of piston (14.1) and syringe (14.2), the forward socket groove of the physical dimension of the patch plug of syringe root and the patch plug of cylinder piston and syringe cylinder piston (5.1) coincide, the B syringe is by piston (15.1), syringe shell (15.2) and interior syringe (15.3) are formed, the physical dimension of the patch plug of B syringe and A syringe root and the patch plug of cylinder piston is identical, the external diameter of B syringe equals the external diameter of A syringe, the internal diameter of B syringe shell (15.2) equals the external diameter of interior syringe (15.3), make the B inner core can insert B tube shell, very close to each other again, because A, the piston plug of B syringe measure-alike, can require to use the forward socket groove of different syringes and syringe cylinder piston (5.1) to link to each other according to different patients, under the control system control of syringe, carry out the different injections that require.

Claims (4)

1, a kind of injector for medical purpose, form by syringe shell (1), inner shell (2), motor (3), ball screw (4), syringe cylinder piston joint (5) and syringe, it is characterized in that: motor (3) is by flexible clutch (8) and coaxial connection of ball screw (4), have socket groove (5.1) in the front side of syringe cylinder piston joint (5), this socket groove (5.1) can be connected with the syringe of different capabilities.

2, a kind of injector for medical purpose according to claim 1 is characterized in that: fix a swept resistance (11) on syringe inner shell (2) wall, " current potential " on the sliding contact is connected to swept resistance buffer (9) by swept resistance lead-out wire (10).

3, a kind of injector for medical purpose according to claim 1, it is characterized in that: the shockproof pad of fixedly employing (13) of motor (3), pressure-sensitive crystal (12) is installed between syringe cylinder piston joint (5) and the ball screw (4), pressure-sensitive crystal lead-out wire (7) one ends are connected to the outer tube rear end of screw mandrel, and the other end is connected to pressure-sensitive signal amplifier (6).

4, a kind of injector for medical purpose according to claim 1, it is characterized in that: socket groove (5.1) comprises fixedly socket groove (5.3) of piston push rod socket groove (5.2) and A, B syringe, and the forward socket groove of the physical dimension of the patch plug of syringe root and the patch plug of cylinder piston and syringe cylinder piston (5.1) coincide.

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