JPH0592026A - Method and device for securing processing for used injection needle - Google Patents

Abstract

PURPOSE:To execute a securing processing for a used injection needle so as to prevent danger. CONSTITUTION:A first electrode 17 is allowed to abut on the vicinity of a base end 15 of a used injection needle 14, and also, the tip 16 is pressed against a second electrode 19, a voltage or a current corresponding to size of this used injection needle 14 is applied between a first electrode 17 and a second electrode 19 and the used injection needle 14 is softened by electric conduction heating, and between a first electrode 17 and a second electrode 19, the used injection needle 14 is cut by pressing it against a fixed blade 24 by a moving blade 23, add the tip 16 side of this used injection needle 14 is dropped down and contained in a needle tip part containing case. Also, a base end side cut part 48 is sealed by pressing the part between the moving blade 23 and a receiving part 26 of the fixed blade 24, it is unnecessary to touch on the detached tip with a hand, and moreover, a residual liquid does not leak from the base end side cut part 48.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a used injection needle safety treatment method and apparatus for treating a used injection needle without causing any danger.

[0002]

2. Description of the Related Art In the conventional method for treating a used injection needle, the used injection needle is cut and a tip is covered with a cap for disposal.

[0003]

However, according to the conventional treatment method, when the cap is put on the tip of the used injection needle, the needle tip pierces the hand to injure or infect with pathogenic bacteria, or the cap comes off. There were times when it happened. In addition, since the base portion of the cut used injection needle is discarded with the cut portion left open, residual liquid may leak and contaminate the surroundings.

The present invention overcomes these drawbacks of the prior art,
The used injection needle is softened by electric heating to blunt the tip and cut, and the tip side is stored in the needle tip storage box without touching the hand, while the cut end of the used injection needle is cut at the base side. It is an object of the present invention to provide a safety treatment method for a used injection needle and a device therefor in which a part is sealed and a hand is not pierced with a needle tip and a residual liquid does not leak.

[0005]

In order to achieve the above-mentioned object, a safety treatment method for a used injection needle, which is a feature of the present invention, involves contacting a first electrode in the vicinity of the proximal end of the used injection needle. , Pressing the tip of the used injection needle against the second electrode,
A voltage or current according to the thickness of the used injection needle is applied between the first electrode and the second electrode to soften the used injection needle by heating by heating, and the first electrode and The used injection needle is pressed between the second electrode and the fixed blade by the moving blade to cut the used injection needle, and the tip side of the used injection needle is dropped and stored in the needle tip storage box. At the same time, the base end side cutting part of the used injection needle is sealed by pressing between the moving blade and the receiving part of the fixed blade.

[0006] The safety treatment device includes a first electrode that abuts near the base end of the used injection needle, a second electrode to which the tip of the used injection needle is pressed, and the first electrode. The voltage or current according to the thickness of the used injection needle whose proximal end is in contact and whose distal end is pressed against the second electrode is applied to the first electrode.
Voltage or current control device applied between the first electrode and the second electrode, and a movable blade and a fixed blade disposed on both sides of the used injection needle between the first electrode and the second electrode. And a receiving portion provided on the fixed blade to which the movable blade is pressed, and a needle tip storage box provided below the movable blade and the fixed blade and the second electrode. is there.

[0007]

The used injection needle between the first electrode and the second electrode is softened by electric heating due to the voltage or current applied between the first electrode and the second electrode, and the used injection needle is injected. The tip of the needle is pressed against the second electrode and becomes blunt. Then, the softened used injection needle is cut by the moving blade and the fixed blade between the first electrode and the second electrode, and the tip side is dropped and stored in the needle tip portion storage box, while the base end is stored. On the side, the cutting portion is pressed against the receiving portion of the fixed blade by the moving blade and is sealed, so that leakage of the residual liquid is prevented.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 6 is a vertical cross-sectional front view showing the entire used needle safety processing apparatus 1 according to the present invention. In a portable box, a mechanism section 2 and the mechanism section 2 are operated. To be described later, a battery 4 that serves as a power source of the electric circuit 3, a charger 5 that charges the battery 4, and a needle tip storage box 6 that is provided below the mechanism unit 2 and that can be inserted and removed.
And a power cord 7 for connecting the charger 5 to a power line or the like is provided outside.

Next, the mechanism portion 2 will be described with reference to FIG. 2, which is an enlarged view of the mechanism portion 2. At the left end of the horizontally provided support cylinder 8 in FIG. 2, a hole 9 that opens inward of the mechanism portion 2 is provided.
And a support block 1 is provided inside the support cylinder 8.
0 is slidably fitted, and the support block 10 is normally urged by the spring 11 to the right in FIG. An insertion hole 12 arranged on the same central axis as the hole 9 penetrates through the center of the support block 10 so that the used injection needle 14 still attached to the syringe 13 can be inserted up to the proximal end 15. There is. When the used injection needle 14 is inserted into the insertion hole 12 up to the base end 15, the end 1 of the used injection needle 14
6 projects through the hole 9 to the inside of the mechanism 2.

A first electrode 17 is fixed outside the support cylinder 8 near the hole 9, and the needle retainer 18 can move toward the first electrode 17 facing the first electrode 17. It is provided in. A second electrode 19 is arranged outside the support cylinder 8 at positions apart from each other on the central axis of the insertion hole 12, and a shield plate 20 is provided on the back surface of the second electrode 19.
The second electrode 19 is biased toward the support cylinder 8 by the spring 21 together with the shield plate 20. An electrode movement detection sensor 22 is provided on the side of the back surface of the shield plate 20. The electrode movement detection sensor 2
2 is normally exposed, but when the second electrode 19 and the shield plate 20 move to the left in FIG. 2 against the spring force of the spring 21, the electrode movement detection sensor 22 is shielded by the shield plate 20. It has become so.

Between the first electrode 17 and the second electrode 19, the movable blade 2 is positioned so as to be located on both sides of the used injection needle 14.
3 and the fixed blade 24 are provided, and the receiving portion 25 is provided in a portion slightly retracted from the blade edge of the fixed blade 24, and the moving blade 23 moves toward the fixed blade 24 and moves. When the moving blade 23 continues to move in the same direction even after the used injection needle 14 is cut by the shearing action of the blade 23 and the fixed blade 24, the tip of the moving blade 23 is pressed against the receiving portion 25. There is.

FIG. 7 is a side view of the movable blade 23 and the fixed blade 24 as seen from the direction of the line VII-VII in FIG. 2. The movable blade 23 is rotatably attached to a shaft 26 and a blade 27 is provided with a blade tip. Are pulled so as to move toward the fixed blade 24. Moving blade 23 with respect to shaft 26
A rotary disc 29 that can be rotated counterclockwise from a motor (not shown) via a rotary shaft 28 is provided at a position opposite to the blade edge of the pin 30.
Is projected.

As shown in FIG. 7, the rotary disc 29 is normally stopped at a position where the pin 30 presses the movable blade 23, and the movable blade 23 resists the pulling force of the spring 27 to move from the fixed blade 24. It is in a separated state. Then, as will be described later, when the motor is activated and the rotary disc 29 rotates counterclockwise via the rotary shaft, the pin 30 moves the movable blade 23.
Since it is disengaged from the movable blade 23, the movable blade 23 is pulled by the spring 27, cuts the used injection needle 14 between the fixed blade 24 and the fixed blade 24, and is then pressed against the receiving portion 25.

The rotating disk 29 continues to rotate counterclockwise,
When the pin 30 reaches the position indicated by a, the movable blade 23 located at the position indicated by the chain double-dashed line rotates in the direction in which the blade tip moves away from the fixed blade 24 against the force of the spring 27. When the movable blade 23 is returned to the position shown by the solid line, the motor that rotates the rotary shaft 28 and the rotary disc 29 stops.

The first electrode 17 of the mechanism portion 2 shown in FIGS. 2 and 6 is brought into contact with the vicinity of the proximal end 15 of the used injection needle 14 as described later, and the second electrode 19 is used. Injection needle 1
The tip 16 of 4 is pressed and the tip 16 of the used injection needle 14 is blunted by electric heating by the first electrode 17 and the second electrode 19, and the used injection needle 14 is cut by the moving blade 23 and the fixed blade 24. I will do the safety process,
The electric circuit 3 therefor will be described.

FIG. 8 is a block diagram of the electric circuit 3, and FIG. 9 is a wiring diagram of the electric circuit 3. As shown in these drawings, the electric circuit 3 includes a power source section having the battery 4 and the charger 5 described above. 31, a current limiting resistor 32 connected to the second electrode 19, a power supply 31 and a power MOS • FET (transistor) 33 connected to the current limiting resistor 32, a second electrode 19 and a current limiting resistor 32 The average voltage detection circuit 34, the average voltage detection circuit 34 and the power / MOS
Voltage (or current) control device 3 connected to FET 33
5, a thickness correction circuit 36 connected to the voltage (or current) control device 35, a reference voltage generation circuit 37 connected to the thickness correction circuit 36 and the voltage or current control device 35, and a control unit 38. ..

Since the used injection needle 14 has various thicknesses, if the thick needle has a high inter-electrode voltage, and if the thin needle has a low inter-electrode voltage, the used injection needle 1
No. 4 does not have a constant heating state. Therefore, by detecting the thickness of the used injection needle 14, the first electrode 17 and the second electrode 1 are detected.
It is necessary to correct the voltage (or current) that is applied between 9 and 9. Further, since the resistance value of the used injection needle 14 differs depending on the thickness, the resistance value of the used injection needle 14 and the current limiting resistance 32
The time ratio of ON / OFF (see FIG. 10) of the energization signal V3 of the voltage (or current) control device 35 changes depending on the ratio of the above and the. Therefore, the time ratio is converted into a voltage through the thickness correction circuit 36 (see FIG. 9) and used as a signal of the thickness of the used injection needle 14.

In the average voltage detection circuit 34, the second electrode 19
The voltage V1 between the first electrode 17 and the first electrode 17 is detected and averaged by the integrator 39 of FIG. 9 to obtain the average voltage V2 shown in FIG.
By limiting the palace width of the gate 41 of the power MOS FET 33 (see FIG. 9), the average voltage V2 becomes equal to the reference voltage V6 output from the reference voltage generating circuit 37. At this time, the voltage (or current) control device 3
In step 5, the average voltage V2 output from the average voltage detection circuit 34 and the reference voltage V6 output from the reference voltage generation circuit 37 are compared, and when the output of the average voltage detection circuit 34 is small, the power MOS FET 33 is turned on. State and O in the opposite
Set to FF state. As a result, the average voltage V2 becomes substantially equal to the reference voltage V6 as shown in FIG.

In FIG. 10, ΔVTH is a hysteresis width determined by the resistor 42 in the voltage (or current) control device 35. In addition, the resistor 4 in the average voltage detection circuit 34
0 is a bias resistor for setting V1 to 0 volt when the used injection needle 14 is not between the first electrode 17 and the second electrode 19.

When the thickness of the used injection needle 14 changes, the voltage (or current) is changed depending on the ratio between the resistance and the current limiting resistance 32.
Since the ON / OFF ratio of the energization signal V3 output by the control device 35 changes, this is detected by the thickness correction circuit 36, the thickness of the used injection needle 14 is determined, and the instruction voltage V4 is output. The voltage V4 is added to the standard needle voltage V5 to correct the reference voltage V6 output from the reference voltage generating circuit 37 to a voltage according to the thickness of the used injection needle 14. As a result, as shown in FIG. 11, the battery voltage VB of the battery 4 is
With respect to T, the voltage applied between the first electrode 17 and the second electrode 19 is set to the reference voltage V6 according to the thickness of the used injection needle 14.

As shown in FIG. 9, the control unit 38 includes an electrode movement detection sensor 22 shown in FIG. 2, a needle pressing solenoid 43 for moving the needle pressing 18 toward the first electrode 17, and FIG.
A cutter motor 44 for rotating the rotating shaft 28 shown in FIG. 6 in a counterclockwise direction, and a pin 30 protruding from the rotating disk 29.
Is connected to a cutter motor origin detection circuit 45 for stopping the rotation of the cutter motor 44 upon detecting that it has reached the position shown by the solid line in FIG. 7, a battery voltage monitoring circuit 46, and a charging warning generation circuit 47.

As shown in FIG. 2, the used injection needle 14 is inserted into the insertion hole 12 of the instruction block 10 from the distal end 16 toward the proximal end 1.
5, the used needle 14 is pushed together with the syringe 13 against the spring 11 in the indicator cylinder 8 as shown in FIG. 3 to move the indicator block 10 to the left in FIG. The tip 16 of the completed injection needle 14 presses the second electrode 19 against the spring force of the spring 21 to move the second electrode 19.
The electrode 19 of 1 is moved to the left in FIG.

When the second electrode 19 moves, the shield plate 20
Since the electrode movement detection sensor 22 shields the electrode movement detection sensor 22, the second electrode 19 of the electrode movement detection sensor 22 is used by the used injection needle 14
It is detected that the needle 16 is pressed by the tip 16, and the controller 38 (see FIG. 9) excites the needle pressing solenoid 43. As a result, the needle presser 18 moves toward the first electrode 17 and presses the vicinity of the proximal end 15 of the used injection needle 14 against the first electrode 17 to hold it, so that the force pressing the syringe 13 is applied. Even if it is released, the state in which the tip 16 of the used injection needle 14 is pressing the second electrode 19 as shown in FIG. 3 is maintained as it is.

In this state, the used injection needle 14 is energized between the first electrode 17 and the second electrode 19, and the average voltage detection circuit 34 shown in FIGS.
The voltage applied between the first electrode 17 and the second electrode 19 by the voltage (or current) control device 35, the thickness correction circuit 36, and the reference voltage generation circuit 37 is the thickness of the used injection needle 14. The voltage is adjusted and controlled according to the level, and the used injection needle 14 continues to be energized. When the used injection needle 14 is continuously energized, the used injection needle 14 is red-heated and softened by the energization heating, and the second electrode 19 is turned on by the spring force of the spring 21 as shown in FIG. The sharpened tip of the used injection needle 14 is pushed back and blunted by the pressing of the second electrode 19, and at the same time, the used injection needle 14 bends between the first electrode 17 and the second electrode 19. It will be.

As shown in FIG. 4, when the second electrode 19 is pushed back by the spring force of the spring 21, the shield plate 20 is disengaged from the electrode movement detection sensor 22, so that the electrode movement detection sensor 22 is used. Is softened and the second electrode 19 is pushed back, and is input to the control unit 38 in FIG. As a result, the control unit 38 sends a cutoff signal to the power MOS FET 33 through the gate 41,
The voltage applied between the electrode 17 and the second electrode 19 is cut off, and at the same time, the cutter motor 44 is started.

When the cutter motor 44 is driven, FIG.
Since the rotary shaft 28 and the rotary disc 29 shown in FIG. 6 rotate counterclockwise and the pin 30 comes off the moving blade 23,
Is pulled by the spring 27 and rapidly moves toward the fixed blade 24. When the movable blade 23 moves toward the fixed blade 24, as shown in FIG.
Is used to cut the softened used needle 14 between the first electrode 17 and the second electrode 19, and the movable blade 23 is pressed against the receiving portion 25 of the fixed blade 24. The softened proximal end side cutting portion 48 of 14 is sealed by the moving blade 23 and the receiving portion 25 of the fixed blade 24.

When the used injection needle 14 is cut, the portion on the tip 16 side of the used injection needle 14 naturally falls as shown in FIG. It will be stored in the box 6. On the other hand, when the rotating disk 29 shown in FIG. 7 continues to rotate in the counterclockwise direction and the pin 30 reaches the position indicated by a, the movable blade 23 is separated from the fixed blade 24 against the spring force of the spring 27. When the rotary disk 29 rotates 360 degrees and the pin 30 reaches the position shown by the solid line, the cutter motor origin detection circuit 45 of FIG.
Detects this. Then, at the same time when the cutter motor 44 is stopped, the excitation of the needle pressing solenoid 43 is also cut off.

As a result, as shown in FIG.
3 is held at a position away from the fixed blade 24, and the needle presser 18
Also returns to a position away from the first electrode 17. Then, the portion of the used injection needle 14 on the proximal end 15 side is in a state where the proximal end side cutting portion 48 is sealed, and the hole 9 and the insertion hole 12 are formed.
Can be pulled out of the support block 10 together with the syringe 13 while the support block 10 is
The spring force of 1 returns to the original position, and the next used injection needle 14 is placed in a state where the safety processing can be performed.

[0030]

According to the present invention, a used injection needle is efficiently energized and heated at a voltage or current according to its thickness, the tip is blunted and cut, and the cut tip side does not touch the needle at all. Since it can be stored in the partial storage box, there is no concern about injury or infection with pathogenic bacteria, and it is extremely safe and easy to perform safety treatment of used injection needles. In addition, since the cutting portion is sealed at the proximal end of the used needle after cutting, it is safe because there is no sharp cutting surface, there is no problem of residual liquid leaking, and there is also a hygienic effect. It is remarkable.

[Brief description of drawings]

FIG. 1 is an enlarged view of a main part of a state where a used injection needle is cut.

FIG. 2 is an enlarged view of an essential part in a state where a used injection needle is inserted into a mechanism part.

FIG. 3 is an enlarged view of an essential part in a state where the tip of a used injection needle is pressed against a second electrode.

FIG. 4 is an enlarged view of a main part of the used injection needle in a softened state.

FIG. 5 is an enlarged view of an essential part in a state where a movable blade is pressed against a fixed blade.

FIG. 6 is a vertical sectional front view of an embodiment of the device of the present invention.

FIG. 7 is a partial side view as seen from the direction of the line VII in FIG.

FIG. 8 is a block diagram of an electric circuit.

FIG. 9 is a wiring diagram of an example of an electric circuit.

FIG. 10 is a graph showing the voltage of a voltage or current control device.

FIG. 11 is a graph showing a voltage between electrodes.

[Explanation of symbols]

 1 is a used needle safety processing device 6 is a needle tip storage box 14 is a used injection needle 15 is a proximal end 16 is a distal end 17 is a first electrode 18 is a needle retainer 19 is a second electrode 23 is a movable blade 24 is a fixed blade 25 is a receiving part 35 is a voltage (or current) control device 48 is a base end side cutting part

Claims (2)

[Claims] 1. A first electrode is brought into contact with the vicinity of the base end of the used injection needle, and the tip of the used injection needle is pressed against the second electrode, and a voltage corresponding to the thickness of the used injection needle. Alternatively, an electric current is applied between the first electrode and the second electrode to soften the used injection needle by heating by energization, and the used injection is made between the first electrode and the second electrode. The needle is pressed against the fixed blade by the moving blade to cut the used injection needle, the tip side of the used injection needle is dropped and stored in the needle tip storage box, and the proximal side cutting of the used injection needle is performed. A method for safety treatment of a used injection needle, characterized in that the portion is sealed by pressing between the movable blade and the receiving portion of the fixed blade. 2. A first abutting member near a proximal end of a used injection needle
The second electrode to which the tip of the used injection needle is pressed, and the thickness of the used injection needle whose proximal end is in contact with the first electrode and whose tip is pressed to the second electrode. A voltage or current control device for applying a corresponding voltage or current between the first electrode and the second electrode and both sides of the used injection needle between the first electrode and the second electrode. A movable blade and a fixed blade that are arranged, a receiving portion that is provided on the fixed blade and is pressed by the movable blade, and a needle tip portion that is provided below between the movable blade and the fixed blade and the second electrode. A safety treatment device for a used injection needle, comprising a storage box.