JPH09131401A - Medical injector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate operation when a patient makes an injection to his own body by arranging a handle so that a finger is put into a rear end part of a piston to hold the rear end part of the piston. SOLUTION: An injector is constituted of an outer cylinder 1, a piston 2 sliding through the outer cylinder 1 and an injection needle 3 and the piston 2 is made up of a gasket 4 made of an elastic material, a piston rod 5 and a handle 6. The handle 6 is arranged on one side or on both sides symmetrically, a flange is provided at the rear end part of the outer cylinder 1 and so shaped as not to block the sliding of the handle 6 of the piston 2. Moreover, the capacity of the injector is set less than 3ml. Thus, when a patient makes an injection to his own body, his hand is put into the part of the handle and can hold the rear part of the piston stably, thus facilitating operation with one hand.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a medical injector. More specifically, the present invention relates to a medical injector suitable as a self-injection injector used by a patient himself.

[0002]

2. Description of the Related Art A syringe for medical use is usually used by a doctor for injecting a patient. In some cases, patients themselves make injections at home. The syringe used for such a purpose has not been structurally different from a conventional syringe. That is, it was not devised to be convenient for self-injection.

[0003]

Since an ordinary syringe is designed for use by a doctor, it has a structure that is easy to use for that purpose, and in order for a patient to use it for self-injection, It was never easy to use. That is, when used by a doctor, the tip of the syringe faces away from the person holding it, but when used by the patient, the patient holds the syringe in the direction of his or her body. However, it was difficult for patients to use.

In addition, the syringe for self-injection generally has a small volume, and therefore the diameter of the syringe is small, so that the piston rod is easily bent, which also makes the syringe more difficult to use. Furthermore, the patient himself often has a poor physical condition, and in the case of a diabetic patient, numbness of the limbs and a decrease in his visual acuity are often seen, which makes it even more difficult to use.

It is an object of the present invention to provide a syringe which is easy to operate when such a patient makes an injection by himself.

[0006]

In order to achieve the above object, in the present invention, at the rear end portion of the piston of the syringe,
A handle was provided to hold the rear end of the piston by inserting a finger.

That is, according to the present invention, in a medical injector having an outer cylinder and a piston sliding inside the outer cylinder, a handle for inserting a finger and holding the piston rear end is provided at the rear end of the piston. It is a medical injector characterized by being provided.

[0008]

In the injector of the present invention, the handle is provided at the rear end of the piston, so that the patient can hold the rear end of the piston by inserting his / her finger. It became easy.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the syringe of the present invention. The syringe is composed of an outer cylinder 1, a piston 2 that slides inside the outer cylinder, and an injection needle 3. The piston has a gasket 4 made of an elastic material such as rubber,
Piston rod 5 and handle 6 which is a characteristic part of the present invention
Consists of In the case of self-injection, the volume of the syringe is relatively small, usually about 1 ml, but the present invention is suitable for such a small volume syringe, and it is particularly effective when applied to a volume of 3 ml or less. Demonstrate.

FIG. 2 is a plan view of the embodiment shown in FIG.
In addition to the handle 6 shown in FIG. 1, a disk-shaped portion 7 at the rear end of the piston and a flange 8 provided at the rear end of the outer cylinder,
8'is shown. The flanges 8 and 8'are provided for the doctor to put two fingers on when injecting the patient, and are always provided in the conventional syringe. In the syringe of the present invention, it is necessary to prevent the handle 6 from catching on the flange when the piston is pushed down, and as shown in the figure, it projects only in a direction different from the handle and does not project in the direction of the handle. Is preferred. In the syringe of the present invention, the flange can be omitted. Further, as shown in FIG. 3, it may be provided in a semicircular shape only on one side opposite to the handle.

FIG. 4 shows another embodiment of the present invention and is a partial front view showing only the rear portion of the syringe. In this embodiment, the handles are symmetrically provided on both sides as 6, 6 '.

FIG. 5 is a partial front view showing a conventional syringe, and only a small disk 7 is provided at the rear end of the piston. Further, the flange at the rear end portion of the outer cylinder is formed in a donut shape over the entire circumference.

[0013]

EFFECTS OF THE INVENTION Since the injector of the present invention is provided with a handle at the rear end portion of the piston, it is possible to hold the rear portion of the piston by inserting a finger into the handle portion when the patient performs self-injection. Therefore, the piston can be stably held, the operation with one hand is easy, and it is suitable for self-injection.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment of FIG.

FIG. 3 is a plan view showing another embodiment of the present invention.

FIG. 4 is a partial front view showing another embodiment of the present invention.

FIG. 5 is a partial front view showing a conventional syringe.

[Explanation of symbols]

 1 Outer cylinder 2 Piston 3 Injection needle 4 Gasket 5 Piston rod 6,6 'Handle 7 Disc part 8,8' Flange

Claims (7)

[Claims] 1. A medical injector comprising an outer cylinder and a piston that slides in the outer cylinder, wherein a rear end portion of the piston comprises:
A medical injector comprising a handle for inserting a finger to hold a rear end of the piston. 2. The syringe according to claim 1, wherein the handle is U-shaped. 3. The handle is provided on one side.
Or the syringe described in 2. 4. The syringe according to claim 1, wherein the handles are provided symmetrically on both sides. 5. The syringe according to claim 1, wherein a flange having a shape that does not hinder the sliding of the handle of the piston is provided at the rear end portion of the outer cylinder. 6. The syringe has a capacity of 3 ml or less.
The syringe according to any one of 5 to 5. 7. The syringe according to claim 1, which is for self-injection.
The syringe according to any one of 1.