JPH0595525U - Electrode structure in used needle processing equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] By using a pair of electrodes as carbon electrodes, it is possible to perform instantaneous melting treatment without the molten injection needle adhering to the electrodes. A used injection in which a pair of electrode plates 5 and 6 are arranged in a cross shape in a housing 1, inserted through an injection needle insertion port 2 and brought into contact with electrodes 18 and 19 of the pair of electrode plates 5 and 6. Needle 2
In a device in which 2 is melt-processed by a short-circuit current between both electrodes 18 and 19, the pair of electrodes 18 and 19 are carbon electrodes made of high quality isotropic graphite material centering on dense graphite having a fine structure. Therefore, the molten injection needle does not adhere to the electrode, and the life is about 10 times longer than the conventional product.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of an electrode in a device for melting and processing a used injection needle in a medical institution such as a hospital.

[0002]

[Prior Art]

 Conventionally, a pair of electrodes are arranged in a cross shape inside the housing corresponding to the injection needle insertion opening of the housing, and a used injection needle inserted through the injection needle insertion opening and brought into contact with the pair of electrodes is There is known a processing device for a used injection needle which is configured to be melt-processed by a short circuit current (see, for example, JP-A-60-40060).

[0003]

[Problems to be solved by the device]

 However, since the pair of electrodes in the conventional processing device is a metal body, cracks and fireworks may occur during melting due to contact with the electrode of the used injection needle, which may cause fear and melt. The injection needle adheres to the electrode surface and finally in a bridge shape between the electrodes, and then the injection needle does not melt even if it is inserted and contacted. Therefore, it is necessary to replace it with a new electrode. Alternatively, the electrode cannot be reused unless the electrode is cleaned to remove the deposits, resulting in poor durability.

Further, since it is a metal body, there is a problem in that the surface of the electrode, which is the fusion zone, is worn and the heat resistance and wear resistance are poor.

The present invention has been made in view of the above problems of the conventional technique. The purpose of the present invention is that fireworks do not occur during the melting process and the injection needle melts instantly. Moreover, it does not adhere to the electrode surface at all, and therefore it can be used for a long period of time without the need to clean or replace the electrode, and it is about 10 times longer than conventional metal electrodes. Another object of the present invention is to provide a used injection needle processing device having a long life and excellent durability.

[0006]

[Means for solving problems]

 To this end, according to the present invention, a pair of electrodes are arranged in a cross shape in a housing corresponding to an injection needle insertion opening of the housing, and the electrodes are inserted through the injection needle insertion opening to contact the pair of electrodes. The used injection needle processing device is configured such that the used injection needle is melt-processed by a short-circuit current between both electrodes. In the used injection needle processing device, the pair of electrodes are high-quality isotropic materials centering on dense graphite with a fine texture. It is characterized by a carbon electrode made of a graphite material.

[0007]

【Example】

 An embodiment will be described with reference to the drawings. FIG. 1 is a cross-sectional view of an example of an electrode according to the present invention. In the figure, 1 is a housing, 2 is an injection needle insertion port, 3 and 4 are electrode plate contact terminals. The terminals 3 and 4 are electrically connected to the secondary side of the transformer. Reference numerals 5 and 6 are a pair of electrode plates, 7 is a guide electrode plate, and these electrode plates 5, 6, and 7 are on the lower surface of the ceiling wall plate of the housing 1 and directly below the injection needle insertion port 2 in a cross shape. And are separated from each other.

The pair of electrode plates 5 and 6 are made of a good conductive material such as copper and are formed into a rectangular shape in a substantially V shape, and a pair of electrode mounting plate parts 10 and 11 which are slightly wider. One of the electrode plates 5 is attached while being electrically insulated from the ceiling plate wall by screwing the strip-shaped mounting plate portion 8 of the electrode plate 5 to the insulating plates 13 and 14 provided vertically on the mounting plate 12. In addition, the other electrode plate 6 is electrically connected to the ceiling plate wall by attaching the mounting plate portion 9 together with the guide electrode plate 7 to the insulators 15, 16 and 17 vertically provided on the mounting plate 12. The pair of electrode plates 5 and 6 are installed while being insulated from each other, and are in electrical contact with the electrode plate contact terminals 3 and 4.

On the upper surfaces of the plate portions 10 and 11 of the pair of electrode plates 5 and 6, a pair of carbon electrodes 18 and 19 formed in a rectangular chip shape are sandwiched between the bent portions on both sides of the plate portions 10 and 11. The metal guide electrode 20 is fixed to the upper surface of the guide electrode plate 7 by a suitable means such as.

The pair of carbon electrodes 18 and 19 are made of a high quality isotropic graphite material centering on dense graphite having a fine structure, and have good electrical conductivity, heat resistance, wear resistance and molten injection. It has excellent properties such as non-adhesiveness that does not attach the needle.

In the above structure, when the used injection needle 22 still attached to the injection cylinder 21 is inserted from above through the insertion port 2, the tip of the injection needle 22 comes into contact with the carbon electrode 19 and The upper part of the electrode should come into contact with the carbon electrode 18 to form a circuit, and a large amount of short-circuit current should flow instantaneously, causing the injection needle 22 to melt and the molten injection needle to adhere to the carbon electrodes 18 and 19. Instead, it falls into the waste storage box (not shown).

[0012]

[Effect of the device]

 According to the present invention, the pair of electrodes 18, 19 are carbon electrodes of a special composition having excellent wear resistance and non-adhesiveness, so that the injection needle melts instantly without causing fireworks. The molten injection needle is processed without adhering to the electrode surface. Therefore, it is unnecessary to clean and replace the electrodes as in the conventional case, has a life of about 10 times or more as compared with the conventional product, is extremely durable, and is economical.

[Brief description of drawings]

FIG. 1 is a sectional view of an example of an electrode structure according to the present invention.

[Explanation of symbols]

 1 Housing 2 Injection Needle Insertion Port 5, 6 Pair of Electrode Plates 18, 19 Pair of Carbon Electrodes 22 Used Injection Needle

Claims (1)

[Scope of utility model registration request] 1. A used injection needle in which a pair of electrodes are arranged in a cross shape in a housing corresponding to an injection needle insertion opening of the housing, and the electrodes are inserted from the injection needle insertion opening and brought into contact with the pair of electrodes. However, in a used injection needle processing device configured to be melt-processed by a short-circuit current between both electrodes, the pair of electrodes is a carbon made of a high-quality isotropic graphite material centering on dense graphite having a fine texture. An electrode structure in a used injection needle processing device, which is characterized in that it is an electrode.