JP2673401B2 - Injection needle removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection needle removing device for easily removing an injection needle from a used syringe or blood collecting device and discarding it.

[0002]

2. Description of the Related Art Used syringes and blood collection devices (hereinafter, simply referred to as syringes) are required to be discarded after removing the injection needle from the injection cylinder. The injection needle is generally made of metal and requires a disposal process different from that of an injection cylinder made of plastics, glass, metal, etc. Moreover, it has a sharp tip and is dangerous. This is because it can be a source of infection.

[0003] The injection needle is generally attached to the injection barrel through male and female fitting connection, but there are many cases where it is connected by screw connection. Therefore, conventionally, it has been usual to dispose of used syringes exclusively by hand, removing the injection needle from the injection cylinder, and discarding the both separately.

[0004]

According to the prior art, since the work of removing the injection needle must be done manually by a nurse or the like, it is not only inefficient, but also the worker is injured, Therefore, there is a problem that the risk of getting an infectious disease cannot be avoided.

Therefore, in view of the problems of the prior art, an object of the present invention is to use a claw member which swings up and down while rotating, so that the injection needle is not touched at all.
It is an object of the present invention to provide an injection needle removing device that can very simply remove an injection needle from a used syringe.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the structure of the present invention has a plurality of claw members arranged in a circle and simultaneously swinging up and down, and rotating while swinging the claw members up and down. The pawl member may have a horizontal posture in which the tip engages with the screw drive portion of the injection needle and a tilt posture in which the tip is disengaged from the screw drive portion and causes the injection needle to drop downward. The summary will be given.

The claw member may be mounted on a common rotary base, and the drive mechanism may rotate the rotary base and vertically reciprocally drive the claw member. A guide tube for setting the syringe may be attached.

[0008]

According to the structure of the invention, the pawl member simultaneously swings up and down, and when it takes a horizontal posture, the tip engages with the screw drive portion of the injection needle. Therefore, the drive mechanism is operated in this state. Then, the claw member can be inclined downward while rotating the injection needle in the removing direction. That is, the claw member rotates with respect to the screw-coupled injection needle in the detaching direction and at the same time swings downward, and finally takes an inclined posture, so that the injection needle can be smoothly removed from the injection cylinder, and Can be dropped into.

When the pawl member is mounted on a common rotary base, and the drive mechanism rotates the rotary base and drives it up and down, the pawl member is rotated by the rotation of the rotary base and is moved up and down. Since it can be swung up and down, a simple rotation mechanism is sufficient for the drive mechanism,
It can be constituted by a single rotary drive source.

If the guide cylinder is attached above the claw member, the removal of the injection needle can be completed in one movement only by setting the syringe with the injection needle on the guide cylinder.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

The device for removing the injection needle comprises a plurality of claw members 11, 11 ... Which swing up and down, and a drive mechanism 20 which rotates the claw members 11, 11 while swinging (FIG. 1). .

The claw members 11, 11, ... Are mounted on the upper surface of the common rotary base 12 via the pair of brackets 12a, 12a, respectively (FIGS. 2 and 3). A through hole 12b is formed in the center of the rotary base 12, and the claw members 11, 11, ... Are arranged in a circle around the through hole 12b. An annular groove 12c is formed on the outer circumference of the rotary base 12.

The tip of each claw member 11 is sharpened in an isosceles triangle (FIG. 3), and a slit 11a is formed so as to open toward the tip. A cam roller 11b is pivotally attached to the rear end of each claw member 11. Each claw member 11 has a bracket 12a, 1 through a pin 12a1.
The cam roller 11b is mounted so as to be vertically swingable with respect to 2a (FIG. 4), and the cam roller 11b is biased upward by a leaf spring 12d having one end fixed to the upper surface of the rotation base 12.

The rotating base 12 constitutes the rotating unit 10 together with the upper plate 13 and the lower plate 14 (FIGS. 1 and 2), and the rotating unit 10 is assembled to the bottom plate C1 of the storage case C.

The upper plate 13 and the lower plate 14 are assembled in parallel with each other via connecting bolts 15, 15 ... With a spacer 15a. Further, the connecting bolts 15, 15, ..., The spacers 15a, 15a, .. penetrate the rotation base 12 slidably, and therefore, the rotation base 12 includes the upper plate 1
3. Between the lower plate 14 and the lower plate 14, it is possible to move vertically.

A large-diameter gear 16 is attached to the lower surface of the lower plate 14 so as to sandwich the bottom plate C1. Lower plate 1
4. The gear 16 is integrally connected via set screws 16c and 16c, and both are in contact with the bottom plate C1 via the slide ring 16a and the slide spacers 16b and 16b. Therefore, the rotary unit 10 can rotate integrally with the bottom plate C1 by rotationally driving the gear 16. In addition, through holes 14a and 16d are formed in the lower plate 14 and the gear 16 so as to be concentric with the through holes 12b of the rotation base 12.

The upper plate 13 is formed with a slightly larger diameter through hole 13a which is concentric with the through hole 12b (FIGS. 2 and 4). Further, on the lower surface of the upper plate 13, along the outer periphery of the through hole 13a,
A small stepped slope 13b is formed.

The drive mechanism 20 mainly comprises a motor 21, a drive gear 22, a rotary shaft 23, and a pair of swing arms 24, 24 (FIG. 1).

The drive gear 22 is fixed to an auxiliary shaft 22a penetrating the bottom plate C1 (FIG. 2), and meshes with the gear 16 on the lower surface of the bottom plate C1. However, the auxiliary shaft 22
a is rotatably positioned with respect to the bottom plate C1 via a drive gear 22, sliding spacers 22b and 22b, and a collar 22c. Further, the auxiliary shaft 22a has an auxiliary gear 2
2d is fixed. The auxiliary gear 22d is connected to the motor 21
Meshes with a cylindrical gear 21a fixed to the shaft end of the gear. Therefore, the gear 16 includes a drive gear 22 and an auxiliary gear 22.
d, and is connected to the motor 21 via the cylindrical gear 21a (FIG. 1).

The rotating shaft 23 includes brackets 23a, 23a.
It is rotatably supported on the upper surface of the bottom plate C1 via.
A worm wheel 23b is fixed to an intermediate portion of the rotary shaft 23, and disks 23c and 23c having eccentric pins 23c1 are fixed to both ends thereof. The rotating shaft 23 includes a cylindrical gear 21a at the shaft end of the motor 21, an auxiliary gear 21b, another auxiliary gear 21c, and a worm 21 coaxial with the auxiliary gear 21c.
It can be rotationally driven by the motor 21 via d and the worm wheel 23b.

An eccentric pin 2 is attached to one end of each swing arm 24.
An elongated hole 24a with which 3c1 is engaged is formed. Also,
The other end of the swing arm 24 is formed in a fork shape, and is swingably supported by a bracket 24b protruding on the upper surface of the bottom plate C1 via a pin 24c. A drive pin 24d is attached to the tip of each swing arm 24 toward the inside. Drive pins 24d, 24
It is assumed that d is engaged with the concave groove 12c formed on the outer periphery of the rotation base 12 from both sides of the rotation base 12 in the diametrical direction thereof to support the rotation base 12 (FIG. 2).

When the motor 21 is rotated, the rotation unit 1
0 rotates via the drive gear 22 and the gear 16, and therefore the claw members 11, 11, ... Can also rotate together with the rotary unit 10. On the other hand, at this time, the rotary shaft 23
Since the oscillating arms 24, 24 also rotate in one direction, the eccentric pins 23c1, 23c1 are used to move the pins 24c, 24c.
Therefore, the rotary base 12 supported by the drive pins 24d, 24d can be vertically reciprocated.

The cam rollers 11b of the claw members 11, 11 ...
11b ... are biased upward by the leaf springs 12d and are positioned by contacting the lower surface of the upper plate 13 (FIG. 4). Therefore, each claw member 11 can simultaneously swing up and down about the pin 12a1 as the rotation base 12 moves up and down. However, the claw members 11, 11, ... Take a horizontal posture when the rotation base 12 is at the top dead center (the same figure), and as the rotation base 12 descends, the tips incline downward (FIG. 5). When 12 descends to the bottom dead center, the cam roller 11
By rolling b, 11b, ... along the slope 13b of the upper plate 13, it is possible to take a greatly inclined posture (FIG. 6). When the rotary base 12 returns from the bottom dead center to the top dead center, the claw members 11, 11, ... Swing upward in the order of FIG. 6, FIG. 5, and FIG. 4, and return to their original horizontal postures.

That is, the claw members 11, 11 ... Can rotate as a whole by rotating the motor 21 by rotating the motor 21, and at the same time, move up and down by the rotating base 12. It is possible to take a horizontal posture and an inclined posture by swinging to the.

The storage case C comprises a main body having a bottom plate C1 and a removable cover plate C2 (FIG. 1). The cover plate C2 has a guide hole C2a formed immediately above the rotary unit 10. ing. A guide cylinder C3 is vertically provided around the guide hole C2a, and a through hole C3a is formed at the bottom of the guide cylinder C3 (FIG. 2). The bottom of the guide cylinder C3 enters the through hole 13a of the upper plate 13,
It is almost at the same level as the upper plate 13.

Below the storage case C, a discarding box D is loaded (FIG. 1). A through hole D1 is formed on the upper surface of the box D, and the box D has a through hole D1.
It can be positioned and loaded so that 1 is located directly below the rotary unit 10.

The used syringe A is assumed to be a blood collecting device, which comprises a holder A1 and an injection needle A2 screwed to the holder A1. At the base of the injection needle A2, a screw drive unit A in which wing-shaped engaging projections are formed in a cross shape in four directions
2a is attached. Further, an auxiliary needle A2c with a rubber cover A2b is attached above the injection needle A2 (Fig. 6). The auxiliary needle A2c mounts the injection needle A2 on the holder A1 and attaches the injection needle A2 to the blood vessel. Insert the blood collection container A3, which is a vacuum container, into the holder A1 and insert it into the holder A1.
Blood can be collected by breaking through the bottom of 3.

Now, when the rotary base 12 is placed at the top dead center, the claw members 11, 11 ... Are in a horizontal posture and the holder A1 with the injection needle A2 is inserted into the guide cylinder C3, the guide cylinder C3
Can store and position the holder A1 (FIG. 4). At this time, the injection needle A2 penetrates the through hole C3a of the guide cylinder C3 from top to bottom, and the tips of the claw members 11, 11 ... Engage with the screw drive portion A2a of the injection needle A2 (FIG. 3).
The engagement state between the claw members 11, 11, ... And the screw drive portion A2a may be a state in which the screw drive portion A2a is rotated by 45 degrees in FIG.

Subsequently, the motor 21 is activated and the injection needle A
By rotating the claw members 11, 11 ... in the direction in which 2 comes off,
The injection needle A2 has a loose screw connection with the holder A1 (FIG. 5) and can be removed from the holder A1. However,
At this time, the holder A1 is grasped by fingers so as not to rotate together with the injection needle A2. Further, since the claw members 11, 11 ... Swing downward as the injection needle A2 is disengaged and the rotary base 12 is moved downward, there is no risk of preventing the injection needle A2 from being disengaged.

When the rotary base 12 reaches the bottom dead center, the claw members 11, 11, ... Take an inclined posture (FIG. 6). At this time, the tips of the claw members 11, 11 ...
Since the injection needle A2 is disengaged from the screw drive portion A2a and a large space B is formed in the middle thereof, the injection needle A2 is
2 can be dropped downward through the space B and stored in the discarding box D. However, the claw members 11, 11
Is set appropriately for each reduction ratio between the motor 21, the rotary unit 10, and the rotary shaft 23, and the movement amount of the rotary base 12, and is swung downward until the tip comes off the screw drive portion A2a. , The screw driver A2a can be rotated by a sufficient number of rotations so that the injection needle A2 can be disengaged from the holder A1, and further, when the injection needle A2 rotates and the injection needle A2 advances downward according to the screw lead, It is assumed that the tip moves downward at a speed slightly faster than the traveling speed.

In this way, from the holder A1 to the injection needle A2
After removing the holder, the holder A1 may be removed from the guide cylinder C3 and discarded. The motor 21 continues its operation thereafter, and is stopped when the rotation base 12 returns to the top dead center to prepare for the next processing of the syringe A.

[0033]

[Other Embodiments] Each claw member 11 guides both end portions of the rear end guide pin 11c instead of swinging through the leaf spring 12d and the cam roller 11b when the rotary base 12 moves up and down. Guide holes 1 of the brackets 13c, 13c
It may be rocked by engaging with 3c1 and 13c1 (FIGS. 7 and 8).

Bracket 12 for supporting each claw member 11
Each of a, 12a, ... Is an L-shaped member that is bent at a right angle, and is mounted in a circular array on the upper surface of the rotary base 12. Therefore, each claw member 11 has a pin 12a1.
Is supported between two adjacent brackets 12a, 12a so as to be swingable. Also, the bracket 12a,
L-shaped guide brackets 13c, 13c, ... Are arranged in parallel to the brackets 12a, 12a. However, the guide brackets 13c, 13
It is assumed that c ... Are fixed to the lower surface of the upper plate 13 not shown. Each of the guide brackets 13c has a horizontal rear portion and guide holes 13c1 and 13c1 whose front end portion is bent obliquely upward.

A guide pin 1 is provided at the rear end of each claw member 11.
1c is inserted, and both ends of the guide pin 11c are
Guide holes 1 of adjacent guide brackets 13c, 13c
It is engaged with 3c1 and 13c1.

When the rotary base 12 is at the top dead center, the claw members 11, 11 ... Have a horizontal posture (FIG. 9), and at this time, the tips of the claw members 11 are inserted into the guide cylinder C3. It can be engaged with the screw drive A2a of the completed syringe A. At this time, the guide pin 11 of each claw member 11
c is at the rear end of the guide holes 13c1 and 13c1.

Next, when the motor 21 is driven and the rotary base 12 moves downward while rotating, each claw member 11 is rotated.
, The pins 12a1, 12a1 ...
Since they swing downward simultaneously (two-dot chain line in the figure), the injection needle A2 of the syringe A can be removed. When the rotary base 12 reaches the bottom dead center, the guide pin 11c of each claw member 11 rides on the bent portion of the tip of the corresponding guide hole 13c1, 13c1. The needle A2 can be dropped downward (dashed line in the figure).

When the rotary base 12 returns from the bottom dead center to the top dead center, the guide pins 11c, 11c ... Also guide holes 13c1 as the pins 12a1, 12a1.
, 13c1 ... Return to the rear end, and the claw members 11, 11 ...
Can return to its original horizontal position.

The claw members 11, 11 ...
c, 11c ... Corresponding guide holes 13c1
, 13c1 are positively driven in the entire stroke of the downward swinging motion and the upward returning motion, the overall operation can be further ensured.

The discarding box D can be provided with a polygonal pyramidal projection D2 immediately below the through hole D1 into which the injection needle A2 is introduced (FIGS. 10 and 11). Since the projection D2 can randomly disturb the attitude of the injection needle A2 to be thrown in, the injection needle A2 does not stand in a needle mountain shape at the bottom of the box D, and the number of the injection needles A2 to be stored is significantly increased. be able to.

Further, in the box D, parallel recesses D3,
D3 can be formed, the whole is loaded in the storage case C, and a handle D3a for removing from the storage case C can be formed. Further, the box D can be provided with a cap D5 for closing the through hole D1 after accommodating the injection needles A2, A2 ... And a recess D4 for holding the cap D5 before use. You may form.

Although the box D in FIGS. 10 and 11 is illustrated on the assumption that it is integrally formed of a transparent plastic material, the box D can be made of any other disposable material. it can.

In the above description, the syringe A may not be a blood collecting device, but may be a general syringe including an injection cylinder and an injection needle attached to the injection cylinder. At this time, the holder A1 in the above description should be read as the syringe A1.

A series of operations for driving the rotary base 12 standing by at the top dead center and returning it to the top dead center through the bottom dead center include, for example, the motor 21 when the holder A1 is inserted into the guide cylinder C3. Can be easily achieved by activating the above, detecting that the rotation base 12 has returned to the top dead center, and stopping the motor 21. The rotating base 1
2 is lowered to the bottom dead center and the time when the removal of the injection needle A2 is completed is detected and displayed, and while the motor 21 is completing one cycle of operation, the injection needle A2 is removed and the holder A1 is guided. It can be removed from the cylinder C3, and the operating procedure for handling the used syringe A can be further facilitated. Further, even when a predetermined number or more of the injection needles A2 are accommodated in the box D, a display for replacing the box D may be displayed.

Further, it goes without saying that the motor 21 may be driven by an independent battery power source as well as being driven by a commercial power source.

The claw members 11, 11 ... Can be arbitrarily matched to the shape of the injection needle A2 as long as the tip of the claw member 11, 11 can be engaged with the screw driving portion A2a of the injection needle A2 and the injection needle A2 can be rotationally driven. It can be transformed into In addition, the present invention
Since the claw members 11, 11 ... Rotate the injection needle A2, the invention can be applied to not only the screw connection injection needle A2 but also the fitting connection injection needle.

[0047]

As described above, according to the present invention, by providing a plurality of claw members and a drive mechanism for simultaneously swinging and rotating the claw members, the claw members can be used as a used syringe. Since the injection needle can be rotated and easily removed, it has an excellent effect that the injection needle can be removed very easily, efficiently and safely without touching the dangerous injection needle at all. .

[Brief description of the drawings]

FIG. 1 is an overall perspective explanatory view

FIG. 2 is a cross-sectional explanatory view of main parts

[Fig. 3] Plan view of main parts

FIG. 4 is an operation explanatory diagram (1).

[Fig. 5] Operation explanatory diagram (2)

FIG. 6 is an operation explanatory diagram (3)

FIG. 7 is an exploded perspective view of essential parts showing another embodiment.

FIG. 8 is a cross-sectional view taken along line XX of FIG.

FIG. 9 is an operation explanatory diagram (4)

FIG. 10 is an explanatory perspective view of a box.

11 is a vertical cross-sectional view of the center of FIG.

[Explanation of symbols]

 A ... Syringe A2 ... Injection needle A2a ... Screw drive part C3 ... Guide tube 11 ... Claw member 12 ... Rotation base 20 ... Drive mechanism

Claims (3)

(57) [Claims] 1. A plurality of claw members arranged in a circle and simultaneously swinging up and down, and a drive mechanism for rotating the claw members while swinging the claw members up and down, the tip of the claw member being an injection needle. And a tilted posture in which the tip is disengaged from the screw driving part and the needle is dropped downward. 2. The detachment of an injection needle according to claim 1, wherein the claw member is mounted on a common rotary base, and the drive mechanism rotates the rotary base and reciprocates up and down. apparatus. 3. The needle needle removing device according to claim 1, further comprising a guide cylinder provided above the claw member for setting a syringe with an injection needle.