CN85200273U

CN85200273U - Needleless syringe

Info

Publication number: CN85200273U
Application number: CN198585200273U
Authority: CN
Inventors: 孙振寰
Original assignee: DALIAN CHEMICAL INDUSTRY Co
Current assignee: DALIAN CHEMICAL INDUSTRY Co
Priority date: 1985-04-01
Filing date: 1985-04-01
Publication date: 1985-09-10
Also published as: GB8607512D0; GB2173106A

Abstract

The utility model relates to a needleless syringe which is a medical instrument used for various kinds of epidemic prevention and treating injection. The needleless syringe is composed of a manual lever compressing device, a dose regulating device, a pressure regulating device and a medicine spraying device. When in operation, the needleless syringe can be fixed on a working platform, and the injection can proceed by pressing the lever manually. A large quantity of clinical trials prove that the hypodermic injection by using the needleless syringe is simple and safe and has no cross infection; the injection dose is exact, the effect is the same as that of the needle injection, and the speed is fast (1200 times / hour). Thus, the needleless syringe is especially useful for large scale epidemic prevention injection. Besides, because the structure is simple, the use and the maintenance are convenient, and the cost is reduced greatly, and is 1/30 to 1/40 of the cost of the using needleless syringe at present.

Description

Needleless syringe

This utility model belongs to a kind of improvement that is used to prevent epidemic and treats the medical apparatus and instruments of injection.

Needleless injection is to make medicinal liquid form high pressure fluid column with compressor to inject the subcutaneous purpose that reaches injection.Because this method can reduce receiver's misery, especially children's is not frightened, and speed can prevent cross infection again soon, thereby the large-scale immunization inocultation of optimum.

Known needleless injector is taked can extrude aperture to liquid and produce high pressure liquid stream when spring loosens suddenly with the potential effect power after the spring compression mostly.The method of compression spring has following several substantially.

1, utilize oil gear, as British patent (BP879427), this device generally needs 6～7 ability of hand to compress spring fully.

2, utilize spiral methods compression spring such as British patent (BP964585);

3, utilize compressed air compression spring, as United States Patent (USP) (USP3859996), it sets up the action that an air compression plant is finished the compression spring.

Inject with compression spring method, its speed is approximately 500～600 person-times/hour.These needleless injectors are owing to only limit a kind of pressure of design with the potential of a spring, and can not change.

See from the profile of needleless injector mostly to be pistol-shaped and tubular greatly, this kind design is easy to carry, move, but because of recoil strength is bigger, sometimes because hand-held shakiness makes receiver's designated port hemorrhage.

Known needleless injector adopts seal with elastometic washer mostly, uses about 3000 person-times must change cushion rubber, not only makes troubles to use, also increases expense.

The needleless injector complex structure delivered of patent though resemble the easy to operate air compression plant that needs of U.S. Pat P385996, involves great expense in addition, therefore is difficult to generally adopt.

The purpose of this utility model is to overcome the shortcoming of existing needleless injector, designs a kind of (cost is low) simple in structure, and easy to use, applied range is injected needleless injector rapidly.

It is the conventional practice of power that the design of this needleless injector is abandoned with spring compression potential, adopts lever principle, and the power that hand pressure lever produces directly compresses medicinal liquid and forms high pressure fluid column, and the revolving type of simplicity of design is regulated the pressure device, makes pressure at 50～300 kilograms/cm ²Variation can adapt to the needs of different accepting objects in the scope.This needleless injector adopts the rustless steel idol part grinding-in of the above hardness of HRC50, need not the rubber ring pad, when designing simultaneously the high pressure liquid leakage has also been done consideration, overcomes and leaks the medicine phenomenon, makes the life-span can use 1.8 hundred million person-times.In addition, this utility model needleless injector is considered easy to operate, can portablely also can be fixed on the workbench, makes operator's injection also non fatigue feeling feel in several hours continuously, can avoid receiver's skin abrasion again because syringe is fixing simultaneously, increases safety.

Needleless injector of the present utility model is done power with lever and is made medicinal liquid produce high pressure by compression by plunger after liquid medicine enters the medicine chamber.This high pressure medicinal liquid enters chemical spraying device again, and through the adjusting of pressure-regulating device, the high pressure fluid column that can eject different pressures is injected.This utility model is operated 1200 person-times/hour of rapid De Duokeda owing to lever, do power and directly compress medicinal liquid.

Figure one is the A-A cutaway view of needleless injector, figure two be A to view, figure three left views; Figure four is that K is to view.Wherein figure one demonstrates the primary structure of Needleless injection, comprises chemical spraying device, and pressure is regulated, and goes into medicine device, high pressure chest, the structure of lever power plant and base part; Figure two and figure four are structures of dose actuator, and figure two and figure three are the profile and the structure of medicinal liquid importation.

The description of the drawings:

2, block; 3, gem nozzle; 4, needle-valve body nut; 5, needle-valve; 6, tight medicated cap; 7, medicinal sprayer body; 8, needle-valve push rod; 9, pressure regulating spring; 10, pressure is regulated the top; 11, pressure regulating handle; 15, accent amount hands handle; 19, lever handle; 21, shaft gear; 22, connecting rod; 23, tooth bar; 24, connecting plate; 25, little axle; 26, fastening bolt; 27, roller rod; 28, roller rod waist axle; 29, nut; 30, roller shaft; 31, roller; 32, footstock; 33, screw; 34, push rod; 35, bearing pin; 36, handlebar; 37, needle-valve body; 38, discharge valve seat; 39, dump valve; 40, the high pressure pump housing (on); 41, plunger bushing; 42, inlet valve; 43, dog screw; 44, plunger spring; 45, plunger; 46, the high pressure pump housing (descending); 47, slip guiding sleeve; 48, pedestal; 49, the mouth that is used as medicine; 50, drainage screen; 51, the joint that is used as medicine; 52, go into pencil; 53, tight medicated cap; 54, graduated disc; 55, pressing plate; 56, Stroke Control bar.

Textual representation among the figure: a: the directrix of pressure regulator; B: the scale on the pressure regulating handle; C: the pointer on the tooth bar (23); D: high pressure pump housing giving drugs into nose chamber; E: the straight trough on the plunger (45); F: the cannelure that medicine chamber cover (41) is used as medicine mouthful; G: high pressure pump coupling place up and down; C: the district of rising that splashes of chemical spraying device.

Structure of the present utility model is illustrated:

Of the present utility modelly be characterised in that doing power with lever makes medicinal liquid produce high pressure, it mainly comprises: the medicinal liquid importation; Go into medicine device; The dose actuator; The lever compressor; Several parts of pressure regulator and chemical spraying device are formed.

Medicinal liquid input: by be used as medicine mouthful (49), drainage screen (50), the joint that is used as medicine (51) and go into pencil (52) composition.The medicinal liquid of input enters the mouth that is used as medicine and arrives medicine device after filtering.

Go into medicine device: form by plunger (45), plunger spring (44), dump valve (39), inlet valve (42) medicine chamber (d) and medicine chamber cover (41).One straight trough (E) is arranged on the plunger (45), and the mouth that is used as medicine is overlapped in the medicine chamber a cannelure (f).Recover to drive plunger (45) by plunger spring (44) and move downward dump valve (39) pass, inlet valve (42) leaves, and medicinal liquid enters medicine chamber (d), and the straight trough on the plunger (E) can make medicinal liquid remain and be used as medicine a mouthful UNICOM.The cannelure (f) that the mouth that is used as medicine is overlapped in the medicine chamber not only can keep UNICOM with inlet valve all the time, and is recoverable to the liquid medicine that high pressure chest drains back to, and thoroughly overcomes the leakage medicine phenomenon under the high-pressure situations.

Dose actuator: by accent amount handle (15), tooth bar (23), the surface of tooth bar can be gone up at graduated disc (54) with tooth bar with pointer (C) and be moved, Stroke Control bar (56) and fastening bolt (26) are formed, rotate accent amount handle, tooth bar is moved up and down drive the Stroke Control bar, the stroke of control plunger changes the volumetrical size in medicine chamber to reach.Pointer on the tooth bar can be indicated dose quantity, and adjustable extent is 0.2～2ml.Constant to reach each dosage fixedly the time with dose fastening bolt (26), without this fastening bolt injection volume according at every turn and decide.

Lever compressor: by the connecting rod (22) of lever, roller rod (27), roller rod waist axle (28), roller shaft (30), roller (31), slip guiding sleeve (47) and notes plugs (45) are formed, and hand lever handle (19) power is delivered to plunger by slip guiding sleeve and directly is added on the medicinal liquid.

Pressure regulator: by pressure regulating spring (9), pressure regulates top (10) and pressure regulating handle (11) is formed.Pressure regulating handle has scale (b), and injector body (7) is marked with directrix (a).When the pressure of turn pressure adjustment disk controlled pressure spring to select suitable spray medicine pressure, the pressure range of accommodation is at 50～300 kilograms/cm ²

Chemical spraying device: by gem nozzle (3), needle-valve (5), Needle shaft (8) and medicinal sprayer body (7) and needle-valve body (37) are formed.When entering splashing of injection apparatus, the high pressure medicinal liquid rises behind the district (O) along with the increase of pressure, medicinal liquid behind the pressurized acts on the needle-valve (5), the needle-valve tail end is connected with push rod (8), so whole strength of spring (9) act on the needle-valve, when medicinal liquid pressure overcame the pressure of needle-valve, spring was compressed, needle-valve is mentioned, liquid medicine ejects at once, forms high pressure fluid column, produces the ability that runs through skin.

The utility model provides a kind of medicine equipment that is widely used in various epidemic prevention and treatment injection, compare with known needleless injector, because the utility model adopts lever actuation power directly to compress soup, being provided with easy to operate dose regulates, pressure regulating part can portablely also can be fixed on the workbench and inject. Thereby not only injection is rapid, the safe and reliable fatigue that also reduces operating personnel. This needleless injector structure is very simple, not only use and keep in repair very convenient also significantly Reducing cost of degree only is 1/30th～40 of the present needleless injector that adopts.

Claims

1, a kind of medical apparatus and instruments needleless injector of the present utility modelly is characterised in that doing power with lever makes medicinal liquid produce high pressure, it by lever compressor, dose actuator, go into medicine device, pressure regulator, several parts of chemical spraying device and form.

2, according to the lever compressor of claim 1 described needleless injector, its feature is made up of connection thick stick (22), roller rod (27), roller rod waist axle (28), roller shaft (30), roller (31), slip guiding sleeve (47) and the plunger (45) of lever.

3, according to the dose actuator of claim 1 described needleless injector, its feature is measured the surface of handle (15), tooth bar (23), tooth bar and can upward be moved at graduated disc (54) with tooth bar with pointer (C) by accent, Stroke Control bar (56) and fastening bolt (26) are formed.

4, according to the medicine device of going into of claim 1 described needleless injector, its feature is made up of plunger (45), plunger spring (44), dump valve (39), inlet valve (42), medicine chamber (d) and medicine chamber cover (41).

5, according to the pressure regulator of claim 1 described needleless injector, its feature is by pressure regulating spring (9), and pressure regulates top (10) and pressure regulating handle (11) is formed.

6, according to the chemical spraying device of claim 1 described needleless injector, its feature is by gem nozzle (3), and needle-valve push rod (8) and medicinal sprayer body (7) and needle-valve body (37) are formed.

7,, it is characterized in that each needs sealing place to adopt the rustless steel idol part grinding-in of the above hardness of HRC50 according to claim 1 described needleless injector.

8, according to the bottom of claim 1 described needleless injector, it is characterized in that having an arc pedestal (48), footstock (32), push rod (34) and handlebar (36) are formed.