JP2978111B2 - Veterinary injection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for injecting a drug solution into an animal such as a moving pig.

[0002]

2. Description of the Related Art In a pig farm where a large number of thousands of pigs are bred, one or two times a day are inspected for poor health or weak pigs. Work is essential. In this case, in order to improve the working efficiency, the pigs must be injected instantly into the moving pig without being caught and fixed.

[0003] As described above, when an injection is made into a moving pig, when the injection needle is pierced, the pig may be surprised to escape, and the pierced needle may be broken from the base. As a result, in the worst case, a broken needle may remain in the pig.

[0004] For this reason, pigs whose injection needles remain in the body may be on the market, and a slaughterhouse has a step of searching for injection needles with a metal detector.

[0005] In addition, when a pig needle notices that the injection needle has broken at the pig farm, it is immediately cut open to take out the injection needle, but the operation is troublesome and requires treatment until the wound is completely cured.

In order to solve such a problem, the inventor of the present invention has tried a veterinary injection device with a stopper as shown in FIG.

In FIG. 1, reference numeral 1 denotes a cylinder of a syringe, in which a plunger 2 for sucking or pushing out a drug solution is incorporated. This plunger 2 is connected to an operation head 4 via a shaft 3.

[0008] A bolt-shaped fitting 6 for attaching the injection needle 5 is screwed into the tip of the cylinder 1, and the injection needle 5 is detachably attached to the head thereof. The chemical solution passes through the through-hole of the bolt-shaped metal fitting 6 and passes through the cylinder 1.
Inhaled or ejected.

Reference numeral 7 denotes a stopper cylinder, which is screwed and fixed to the tip of the cylinder 1 through a hole formed in the bottom of the stopper cylinder, through which the male thread portion of the bolt-shaped metal fitting 6 penetrates. Therefore, the stopper cylinder 7 is attached to the tip of the cylinder by the bolt-shaped metal fitting 6 for attaching the injection needle.

In this injection device, the injection needle 5 is pierced into a pig or the like, and at the same time, the cylinder handle 8 is supported by the forefinger and the middle finger, and the thumb presses the operating head 4 of the shaft. Extruded by muscle.

At this time, the injection needle 5 pierces the pig's body,
When the tip of the stopper cylinder 7 hits the pig's body surface, the injection needle 5 cannot enter any more. Therefore, by setting the length of the stopper tube 7, the penetration depth of the injection needle 5 into the muscle of the pig can be determined.

Conventionally, since the pig enters the body of the pig up to the base of the injection needle, when the pig is surprised and escapes, all of the force concentrates on the base of the injection needle 5 and the needle does not come off. However, when the stopper tube 7 in FIG. 1 hits the pig's body surface, the force is also distributed to the tip of the stopper tube 7,
The force acting on the base of the injection needle 5 decreases.

In addition, as shown by a chain line in FIG.
Is curved and hits the inner periphery of the distal end of the stopper cylinder 7 and cannot be further deformed, so that no further force acts on the root of the injection needle 5. As a result, it is possible to prevent the injection needle 5 from being broken from the root, and since the injection needle 5 does not enter the pig's body up to the root, the injection needle is easily pulled out.

[0014]

However, when the rigid stopper cylinder 7 hits the pig's body, the impact shocks the pig and gives a shock to the pig, causing stress. In addition, it is desirable that the penetration depth of the injection needle 5 can be easily changed depending on whether the pig is a piglet, an adult pig, a mother pig, or the like. Therefore, there is an inconvenience to replace the injection device according to the growth of the pig.

[0015] It is desirable to disinfect the site to be injected. However, if an attempt is made to disinfect it, the pig may be alert and escape, making injection impossible.

[0016] The technical problem of the present invention is to focus on such a problem, and when injecting into a moving animal, the injection site can be automatically disinfected without impact, and the injection needle can be inserted. The purpose is to enable the depth to be easily changed.

[0017]

The technical problem of the present invention is solved by the following means. Claim 1 claims that the inside of a stopper cylinder 7 provided at the tip of the cylinder of the syringe,
The inner cylinder 9 is provided so that the tip protrudes from the stopper cylinder 7, and can be attached to the stopper cylinder 7 so that the injection needle 5 projects from the inner cylinder 9. An elastic body 12 is provided for projecting the inner cylinder 9 from the stopper cylinder 7 with elasticity. The stopper cylinder 7 has a structure that can be expanded and contracted by a screw mechanism or the like.

As described above, since the inner cylinder 9 disposed in the stopper cylinder 7 protrudes from the stopper cylinder 7 by the elastic force of a spring or the like, when the animal is injected into the body, the inner cylinder 9 becomes elastic. The stopper cylinder 7 contacts the animal body only when the tip of the inner cylinder retreats to the same position as the tip of the stopper cylinder 7 against the elasticity. As a result, the impact on the animal is reduced.

Since play is present between the inner cylinder 9 and the stopper cylinder 7, the impact acting on the injection needle 5 is reduced, and the bending of the injection needle 5 can be effectively prevented.

Further, since the stopper cylinder 7 expands and contracts and its total length can be adjusted, the penetration depth of the injection needle 5 can be easily changed depending on whether the piglet is a piglet, an adult pig, or a mother pig.
As a result, the trouble of replacing the stopper cylinder 7 with one having a different length is released.

According to a second aspect of the present invention, a flexible material 19 having a liquid absorbing property is provided at the distal end of the inner cylinder 9 according to the first aspect.
Is an animal injection device having a structure through which an injection needle 5 penetrates.

Therefore, if the antiseptic solution is contained in the soft material 19 such as sponge attached to the tip of the inner cylinder 9, the soft material 19 hits the skin of the animal at the time of injection, and the antiseptic solution adheres to the skin. The stuck portion of the needle 5 is disinfected.

[0023]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a veterinary injection device according to the present invention. FIG. 2 is a cross-sectional view showing a device obtained by improving the animal injection device of FIG. 1 and having a structure in which an inner cylinder is movable. That is, the inner cylinder 9 is disposed inside the stopper cylinder 7 in FIG. A long slit 10 is formed in the stopper cylinder 7 in a direction parallel to the center line thereof, and a pin 11 fixed to the inner cylinder 9 is fitted therein. A compression coil spring 1 is provided between the inner cylinder 9 and the bottom of the stopper cylinder 7.
2 has been inserted.

Therefore, the compression coil spring 1
Since the inner cylinder 9 is resiliently pressed in the direction protruding from the stopper cylinder 7 by the spring force of 2, when the injection needle 5 pierces the pig body, the inner cylinder 9 is pierced after the injection needle 5 pierces the pig muscle. The syringe needle 5 is retracted into the stopper tube 7 against the body surface and against the spring force of the compression coil spring 12, and at this time, the injection needle 5 further enters.
Of the body hits the body surface.

When the stopper cylinder 7 hits the surface of the pig body,
The injection needle 5 cannot enter any more, and the injection needle 5 always enters a certain amount into the body. In addition, since the pin 11 integrated with the inner cylinder 9 reciprocates in the slit 10 of the stopper cylinder 7, the inner cylinder 9 does not fall off.

As shown in FIG. 2, in the case where the inner cylinder 9 is provided inside the stopper cylinder 7 and the injection needle 5 protrudes from the inside, the inner cylinder 9 first strikes the pig's body surface with elasticity. As compared with the case where the rigid stopper cylinder 7 hits, the impact given to the pig is smaller and the injection device is gentle to the pig.

Also, since the inner diameter of the inner cylinder 9 is smaller than the inner diameter of the stopper cylinder 7, the amount of bending of the injection needle 5 is reduced, and the stress applied to the injection needle 5 is also reduced. When the pig escapes, the injection needle 5 first hits the inner circumference of the distal end of the inner cylinder 9, and then the outer peripheral surface of the inner cylinder 9 contacts the inner peripheral surface of the stopper cylinder 7. This gradually increases, and the impact acting on the injection needle 5 is further reduced.

1 and 2, since the size of the stopper tube 7 is constant, the amount of the injection needle 5 entering the body of the pig is constant. However, it is better to change the amount of the injection needle 5 depending on whether the piglet is a piglet or a grown pig and on the type of the injection solution.

For this purpose, FIG. 3 shows a structure in which the stopper tube 7 is expanded and contracted. In the illustrated example, the stopper cylinder 7 is
A fixed cylinder portion 7a attached to the cylinder 1 side of the syringe;
The fixed cylindrical portion 7 and the movable cylindrical portion 7b screwed together.

Therefore, by rotating the movable cylinder 7b with respect to the fixed cylinder 7a and moving the movable cylinder 7b into and out of the fixed cylinder 7a, the amount of protrusion L of the movable cylinder 7b from the fixed cylinder 7a is reduced. Can be adjusted freely.

When the injection is performed at a position shallow from the skin surface, the amount of protrusion L of the movable cylinder 7b from the fixed cylinder 7a is increased.
When injecting deeply, the movable barrel 7b may be screwed into the fixed barrel 7a to reduce the amount of protrusion L from the fixed barrel 7a.

FIG. 4 shows another embodiment of the expansion and contraction mechanism of the stopper cylinder 7, which has a structure of expanding and contracting stepwise. In this figure, (1) is a plan view of the movable cylinder portion 7b, and (2)
Is a plan view of the fixed tubular portion 7a, and (3) is a sectional view taken along the line AA in a state where the fixed tubular portion 7a is inserted into the movable tubular portion 7b.

A lock hole 13 is formed in the side wall of the movable cylinder portion 7b at an interval in a direction parallel to the center line thereof. Further, a U-shaped slit 14 is formed in the side wall of the fixed cylindrical portion 7a to form a leaf spring portion 15, and a protruding portion 16 is provided at the tip thereof. And this ridge 16
Are fitted in the lock holes 13 of the movable cylinder portion 7b.

In this structure, the movable cylindrical portion 7b is moved in a direction parallel to the center line (in the direction of the arrow a1), and the raised portion 1b is moved.
6 into the target lock hole 13, the leaf spring 15
The protrusion 16 is locked in a state fitted into the lock hole 13 by the spring force, so that the amount of protrusion of the movable cylinder 7b from the fixed cylinder 7a can be selected in three stages.

As shown in FIG. 4 (4), a male screw 17 inserted through a hole in the side wall of the movable cylindrical portion 7b is screwed and fixed in a female screw hole 18 formed in the side wall of the fixed cylindrical portion 7a, and the male screw 17 is removed. By moving the movable cylinder 7b and screwing it into another female screw hole 18, the amount of protrusion of the movable cylinder 7b can be changed.

Next, the disinfection function will be described. As shown in FIG. 3, a flexible material 19 having a high liquid absorbing property, such as a sponge, is applied to the distal end of the inner cylinder 9 and a ring-shaped female threaded cap 20 is put thereon. It is screwed and fixed to the part. And the injection needle 5 has penetrated this flexible material 19.

The soft material 19 is impregnated with a disinfectant such as alcohol and the like. When the pig is injected, the soft material 19 comes into contact with the pig's body surface. The liquid adheres to the pig skin and the injection site is disinfected.

By extending the inner cylinder 9 and retracting the tip of the injection needle 5 inside the flexible material 19, the flexible material 19 first contacts the pig skin, and then the tip of the injection needle 5 becomes flexible. It is also possible to penetrate the material 19 so that the injection needle 5 pierces the pig body.

FIGS. 5 to 7 show other embodiments of the animal injection device. FIG. 5 is a perspective view, FIG. 6 is an exploded perspective view, and FIG.
Is a sectional view of the assembled state. In this embodiment, the stopper cylinder 7 is provided with a packing 24 at the tip of the cylinder 1.
Fixed cylindrical portion 7a attached with bolt-shaped fitting 6
An external thread is threaded around the outer periphery of the fixed cylinder 7a, and a movable cylinder 7b having an internal thread is threadedly engaged with the outer periphery of the fixed cylinder 7a.

A ring 21 made of an elastic material such as rubber is fixed to the distal end of the movable cylindrical portion 7b so as to reduce the impact given to the pig. As shown in FIG. 6, a crank-shaped groove 22 is formed on the outer periphery of the inner cylinder 9, and a projection 23 protruding from the inside of the distal end of the fixed cylinder 7 a is fitted therein. This prevents the cylinder 9 from falling off.

FIG. 8 is an exploded perspective view of still another embodiment, in which a fixed cylindrical portion 7a is attached to the tip of the cylinder 1.
No bolt-shaped fitting 6 is used. That is, the male screw 25 is formed on the outer periphery of the distal end of the cylinder 1, and the fixed cylindrical portion 7 having the female screw 26 formed on the inner periphery so as to cover the male screw portion 25.
a is screwed, and a male screw part 27 formed on the outer periphery of the movable cylinder part 7b is inserted into the female screw 26 on the distal end side of the fixed cylinder part 7a and screwed.

The inner diameter of the distal end of the stopper cylinder 7 or the inner cylinder 9 in FIG. 1 is slightly larger than the outer diameter of the mouth of the bottle containing the chemical solution, and the chemical solution bottle is turned upside down. By inserting it into the upper end of 9 and holding it, the operation of sucking the chemical solution into the cylinder 1 can be easily performed.

[0043]

According to the first aspect, the inner cylinder 9 disposed in the stopper cylinder 7 protrudes from the stopper cylinder 7 by the elastic force of a spring or the like. The cylinder 9 hits the animal's body with elasticity, and the stopper cylinder 7 hits the animal's body only when the tip of the inner cylinder retreats to the same position as the tip of the stopper cylinder 7 against the elasticity. As a result, the impact on the animal is reduced.

Since there is play between the inner cylinder 9 and the stopper cylinder 7, the impact acting on the injection needle 5 is also reduced, and the bending of the injection needle 5 can be effectively prevented.

Further, since the stopper cylinder 7 expands and contracts and its total length can be adjusted, the penetration depth of the injection needle 5 can be easily changed depending on whether the piglet is a piglet, an adult pig, or a mother pig.
As a result, the trouble of replacing the stopper cylinder 7 with one having a different length is released.

According to the second aspect, if the disinfectant is contained in the soft material 19 such as a sponge attached to the tip of the inner cylinder 9, the soft material 19 hits the animal skin at the time of injection, and the disinfectant adheres to the skin. Therefore, the stuck portion of the injection needle 5 is disinfected.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an animal injection device before improvement.

FIG. 2 is a cross-sectional view showing an animal injection device with a movable inner cylinder.

FIG. 3 is a sectional view showing an embodiment of an animal injection device according to the present invention.

FIG. 4 is a plan view and a cross-sectional view showing another embodiment of a retractable structure of a stopper cylinder.

5 to 7 show another embodiment of the veterinary injection device, and FIG. 5 is a perspective view showing the entire configuration.

6 is an exploded perspective view of the animal injection device of FIG.

FIG. 7 is a cross-sectional view of the assembled state of the animal injection device of FIG. 5;

FIG. 8 is an exploded perspective view of still another embodiment of the animal injection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder of syringe 5 Injection needle 5a Root of injection needle 5b Position away from the root of injection needle 7 Stopper cylinder 7a Fixed cylinder part of stopper cylinder 7b Movable cylinder part of stopper cylinder 9 Inner cylinder 12 Elastic body (compression coil spring) 19 Flexible material

Continuation of the front page (56) References JP-A 56-118611 (JP, U) JP-B 4-22097 (JP, B2) JP-B 7-17297 (JP, Y2) JP-B 48-24625 (JP) , Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61D 7/00

Claims (2)

(57) [Claims] 1. An inner cylinder is provided inside a stopper cylinder provided at the tip of a cylinder of a syringe so that the tip protrudes from the stopper cylinder, and the inner part of the stopper cylinder is provided such that an injection needle projects from the inner cylinder. The inner cylinder is provided with an elastic body for elastically projecting from the stopper cylinder, and the stopper cylinder is configured to expand and contract by a screw mechanism or the like. Animal injection device. 2. The veterinary injection according to claim 1, wherein a flexible material having a liquid-absorbing property is provided at a distal end portion of the inner cylinder, and the flexible material is configured to penetrate an injection needle. apparatus.