JP3267915B2 - Locking structure in used needle disposal 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 used injection needle discarding apparatus which can safely and promptly remove a used injection needle from a syringe barrel 31 and dispose of it. The present invention relates to a locking claw in a used injection needle disposal device which can securely hold any type of tip portion 30a.

[0002]

[Prior art]

Many syringes currently used are of the disposable type which is used only once, and as shown in FIGS. 9 (A) to 9 (D), etc. The tip 30 of the used injection needle 30
On the inner side of a, a plurality of circumferential grooves are continuously formed. The nozzle of the syringe barrel 31 is formed with an external thread, and the nozzle of the syringe barrel 31 is screwed into the groove formed inside the tip portion 30a. Further, the groove formed inside the chip portion 30a may be formed as an internal screw.

[0004] Around the needle tip portion 30a of the spent, the ribs 30a _1, 30a _1, ... are formed. The number of the ribs 30a ₁ is also variously present. The new injection needle 30 is stored in a sealed case for shipping, and when used, the seal is removed and the cap is opened, and the stored injection needle 30 is taken out and the syringe barrel 31 is removed.
Attached to.

[0005] The used injection needle 30 is removed from the nozzle of the syringe barrel 31 and stored in the original case.
Put on the cap and dispose of the case. Further, a plurality of ribs are formed on the outer periphery of the tip of the injection needle.
Also, ribs are similarly formed on the inner peripheral surface of the storage opening of the case, so that when the used syringe needle is attached to the used syringe needle while the used syringe needle is still attached to the syringe outer cylinder 31, the ribs are connected to each other. When the case is engaged and the case is rotated, the used injection needle can be removed from the nozzle.

[0006] In the work of removing the used injection needle from the syringe barrel 31 and discarding it, there is a danger that the used injection needle may accidentally stick into the skin during the operation and cause serious infection. It has been pointed out that there is something. Therefore, there is a type in which a used injection needle can be removed from the nozzle of the syringe barrel 31 in the case of the injection needle as described above.

However, the case itself accommodating the injection needle is an extremely small-diameter cylindrical body, and an operator sometimes performs such an operation under various circumstances. Accidentally, a used injection needle may pierce the skin. Therefore, Japanese Patent Application Laid-Open No. 9-224985 discloses a device for disposing of used injection needles. Although the above invention includes various embodiments, the following contents are described in the embodiments.

That is, after the syringe stops at the receiving position, the motor or the driving means for fixing the injection needle provided with the weight is rotated through the hollow shaft separating the injection needle space portion, so that the needle removal operation is performed. The needle remover is a fastener provided with a pair of toothed flat plates that operate in front or substantially simultaneously to grip or pinch and fix the injection needle mounting portion.

In this device, when the injection needle is first inserted into the center of the needle removal tool, the motor or the injection needle fixing driving means provided with the weight is rotated, whereby the injection needle fixing driving means is rotated. The fixed used needle also rotates,
The used injection needle falls off the nozzle of the syringe barrel 31 and falls into the storage device as it is.

In this way, when the used injection needles accumulate in the storage device, the entire storage device is discarded. According to the above procedure, the worker removes the used injection needle from the syringe barrel 31 without touching the used injection needle portion at all, and stores the used injection needle as it is in the storage device. It is said that the safety of workers can be sufficiently ensured.

[0011]

By the way, in the invention disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 9-224985, in the embodiment shown in FIG. The tip of the toothed flat plate has many teeth formed in a sawtooth shape. When the tip portion 30a of the used injection needle is actually pinched with such a cutting edge, the following problems occur.

First, the number of ribs formed along the axial direction of the tip portion 30a differs depending on the manufacturer. As shown in FIGS. 9A, 9C, and 9D, there are many cases in which four, six, eight, and the like are used. Therefore, the intervals between adjacent ribs are also different. Therefore,
If the teeth at the tip of the toothed flat plate are the saw-toothed teeth c, as the number of ribs of the tip portion 30a increases, the saw-toothed teeth c at the tip of the toothed flat plate become the tip portion 30a.
Incompletely caught on the rib of
0a, and the tip portion 30a is inserted into the syringe barrel 31.
The toothed flat plate and the tip portion 30a may run idle even when the tip portion 30a is rotated so as to be removed from the device [FIG.
0 (A)].

In the worst case, the chip 3
The ribs 30a ₁ , 30a ₁ ,... Of the 0a are scraped off by the saw-toothed teeth c due to the idle rotation of the toothed flat plate, so that the tip portion 30a has a simple cylindrical shape [FIG. 10 (B)]. reference〕. When the ribs are thick, they cannot engage with the above-mentioned saw-tooth c (see FIG. 10 (C)), and even when the interval between adjacent ribs is narrow, they cannot engage with the saw-tooth c. (See FIG. 10D).

In this case, the tip portion 30a can no longer be rotated by the pinching pressure of the toothed flat plate, and the used injection needle 30 is manually removed from the syringe barrel 31 by the operator. Must be removed. Therefore,
There is a danger of an accident in which the used injection needle sticks into a worker's finger or the like as described above.

[0015]

Means for Solving the Problems Therefore, the inventor of the present invention has intensively studied to solve the above-mentioned problems, and as a result, the present invention
A rotating hollow shaft having a plurality of side through-holes formed at equal intervals on an outer peripheral side surface; a driven member rotatably mounted in a circumferential direction of the rotating hollow shaft; A plurality of pivots for pivotally supporting the distal end portion and penetrating through the side through hole of the rotary hollow shaft so as to clamp the used tips for mounting the used injection needles close to each other inside the rotary hollow shaft. In the used injection needle disposal device comprising a movable locking claw member, a swinging free end of the locking claw member has a holding portion for holding a tip portion of a used injection needle; A locking projection protruding from a side where the locking claw member is close to the tip of the holding portion and at a sharp angle from the side where the locking claw member is close, and locking to a rib formed around the tip portion; And a corner portion formed between the holding portion and the holding portion has a substantially right angle, and a holding surface of a tip portion of the holding portion. By using a locking structure in a used injection needle disposal device formed in a substantially arc shape that can be contacted along a rib formed around the tip portion, the rib of the tip portion of the used injection needle Thus, any of the types can be satisfactorily locked, thereby solving the above-mentioned problem.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings, together with a used injection needle disposal device in which a locking claw member of the present invention is used. As shown in FIG. 7, the main body case 1 has a cylindrical container shape having a top surface 1a, and an injection needle insertion member 2 is provided at the center of the top surface 1a. The injection needle insertion port member 2 has an insertion hole 2a at the center.
Is formed, and the used injection needle 30 is inserted in a state of being attached to the nozzle of the syringe barrel 31.

The opening is wide and the inner peripheral surface is substantially open so that the syringe barrel 31 with the used injection needle 30 attached thereto can be easily inserted from the used injection needle 30 side. It has a spherical shape. The injection needle insertion port member 2
Is used to replace the used injection needle 30 in this device with the syringe barrel 3.
In some cases, it may be linked to the drive switch 4 for starting the operation of detaching from the drive switch 1 and turn on.

On the back side of the top surface 1a of the main body case 1,
The shaft support member 5 is mounted (see FIGS. 1 and 2). The shaft support member 5 supports and fixes the injection needle insertion member 2 so that the injection needle insertion member 2 is slidable in the vertical direction from the back surface side of the top surface 1a, and is always elastically urged upward by a coil spring. Together, they serve as a bearing for supporting the upper end portion of the rotary hollow shaft 7 described later. A bearing housing portion is formed on the lower surface side of the shaft support member 5, and a bearing 6 for supporting the rotary hollow shaft 7 in the vertical direction is housed in the bearing housing portion (see FIG. 7).

The rotary hollow shaft 7 is mounted in the main body case 1 so as to be vertical in the main body case 1 and coaxial with the injection needle insertion member 2. The rotary hollow shaft 7 is a tubular body that is hollow along the axial direction, and the hollow interior 7a is a passage through which the used injection needle 30 removed from the syringe falls. The rotating hollow shaft 7 is formed with a substantially disk-shaped flange-shaped portion 7b protruding in the shaft circumferential direction (see FIGS. 2 and 3). Further, a plurality of side through holes 7c, 7 are provided at the upper end of the rotary hollow shaft 7 in the vertical direction.
are formed [see FIGS. 1A and 2].

A driven member 8 is mounted on the rotary hollow shaft 7. The driven member 8 is mounted rotatably in the circumferential direction of the rotary hollow shaft 7. Specifically, a bearing 9 is mounted between the rotary hollow shaft 7 and the driven member 8. The driven member 8 mounted on the bearing 9 smoothly rotates with respect to the rotary hollow shaft 7. The bearing 9 is press-fitted into the rotary hollow shaft 7 and is supported at the position of the flange 7b. The side through-holes 7c, 7c,...
(See FIGS. 1A and 2).

The driven member 8 receives rotational motion from a power source 19 such as a motor as described above. The driven member 8 is, specifically, a gear having teeth 8a formed on the outer periphery. It has become. In addition, the rotational motion is transmitted from the power source 19 to the driven member 8 via the gear mechanism (see FIGS. 4A and 4B).

A plurality of locking claw members A, A,... Are swingably mounted on the driven member 8 [FIG. 1 (A), FIG.
(B)). Each engagement claw member A is, without the arm shape, and its one longitudinal end a swing free end A _1, had 20 and the engaging projections 21 to swing free end A ₁ is formed .
The free swing end A ₁ is loosely inserted into a side through hole 7 c formed above the rotary hollow shaft 7, and is located in the hollow interior 7 a of the rotary hollow shaft 7. The pivot end 22 serves as a pivot center of the locking claw member A.
2,... Around the rotary hollow shaft 7 on the driven member 8,
It is pivotally supported on the driven member 8 at equal intervals so as to surround the periphery thereof in a circular shape.

The holding portion 20 is a side surface for holding the tip portion 30a of the used injection needle 30, is formed in an arc shape, and relatively extends along the ribs 30a ₁ , 30a ₁ ,... Of the tip portion 30a. Good contact can be achieved. The locking projection 21 is formed at a position appropriately separated from the tip of the holding portion 20 and protrudes from the side where the locking claw members A, A,... Approach (see FIGS. 4 and 5 and the like).

The locking projection 21 is formed so as to be locked to the ribs 30a ₁ , 30a ₁ ,... Of the tip portion 30a. It is preferable that the corner formed by the holding portion 20 and the locking projection 21 be substantially a right angle. With this substantially right angle, the holding portion 20 and the locking projection 21 are
It can be locked in the most reliable state a _1.

The holding portion 20 is preferably formed in a substantially arc shape. By the該抱example portion 20 and a substantially arc shape, the ribs 30a _1, 30a _1, with respect to ... the number is larger type chip portion 30a, the rib 30a _1, 30
a ₁ ,... can be uniformly contacted (see FIG. 6B).

Further, it is preferable that the tip of the locking projection 21 is formed in a sharp shape. By forming the locking projection 21 into a sharp shape, the ribs 30a ₁ , 30a ₁ ,.
Even if the spacing is narrow, the locking projections 21 can easily bite between the ribs 30a ₁ and 30a ₁ , and the locking force can be further increased.

[0027] All of the engagement claw member A, A, ..., the the driven member 8 is rotated relative to the rotary hollow shaft 7, the swinging free end A ₁ is the side through-hole portions 7c, 7c ,..., Each locking claw member A makes a swinging movement about the pivot end 22 by the side through hole 7c. All the swinging free ends A ₁ , A ₁ ,... Approaching the inner wall side of the rotary hollow shaft 7 are closer to the axis of the rotary hollow shaft 7 [FIGS. )reference〕. When the driven member 8 rotates in the opposite direction to the above, all the swinging free ends A ₁ , A ₁ ,... Are simultaneously separated from the close state and are separated from the inner wall of the hollow interior 7 a of the rotary hollow shaft 7. Perform the action of moving to the side.

The rotary hollow shaft 7 is rotatably supported by a support plate 11 mounted in the main body case 1. The support plate 11 can be fixed horizontally at a position appropriately separated from the rear surface of the top surface 1a of the main body case 1 (see FIG. 1). The support plate member 11 is formed with a through hole 11a through which the rotary hollow shaft 7 penetrates, the rotary hollow shaft 7 is inserted into the through hole 11a, and a vertical portion of the rotary hollow shaft 7 is formed at a flange portion 7b. Positional fixation is performed.
Further, the lower end of the above-mentioned injection needle insertion port member 2 and the rotary hollow shaft 7
The upper end of the needle is spaced apart from the upper end of the needle at an appropriate interval, so that the needle insertion member 2 can be moved up and down.

Rotation braking means 12 is provided between the supporting plate 11 and the rotary hollow shaft 7, and a mechanism for applying a load resisting the rotational movement of the rotary hollow shaft 7 by the rotation braking means 12. ing. The rotation braking means 12 causes a rotation angle difference between the rotary hollow shaft 7 and the driven member 8. This angle difference is due to the locking claw member A swinging around the pivot end 22 by the side through hole 7c, and all the swing free ends A ₁ , A ₁ ,. While the proximity or discrete operation is completed inside the rotating hollow shaft 7,
The rotating hollow shaft 7 starts rotating together with the driven member 8 (see FIGS. 5A and 5B).

The rotation braking means 12 is specifically composed of a coil spring 12a and a holding member 12b (see FIGS. 2 and 3A and 3B). As the coil spring 12a, a compression coil spring is used. The holding member 12b has a washer shape. The holding member 12b is fixed below the center of the rotary hollow shaft 7 in the axial direction by a retaining ring or the like.

Then, the holding member 12b and the supporting plate 1
A coil spring 12a is mounted between the support plate 11 and the flange portion 7b of the rotary hollow shaft 7 is always pressed against the support plate 11, and the rotary hollow shaft 7 is provided with a resistive force against the support plate 11 in the rotational direction. Is to be given. Due to the resistance, an angular difference can be generated when the rotation of the rotary hollow shaft 7 and the driven member 8 is started.

An electric motor is used as the power source 19 for transmitting the rotational motion to the driven member 8. The power source 19 is an electric motor, and the drive gear 17 includes the drive gear 1.
An intermediate gear portion 18 is provided between the driven member 8 and the driven member 8 having a tooth portion 8a formed on the outer periphery thereof, so that the driven member 8 is rotated by a power source 19 [FIGS. 1 (A) to 1 (C). )reference〕.

Rotary hollow shaft 7, driven member 8, supporting plate 1
1 and the main body case 1 containing the rotation braking means 12 and the like,
It is connected to the collection container 25 in the vertical direction (see FIG. 7). The collection container 25 is a container for collecting and storing the used injection needle 30 removed from the syringe barrel 31 on the main body case 1 side. A collecting hole 25a is formed at the center of the upper surface of the collecting container 25, and the collecting hole 25a is in position with the lower end of the rotary hollow shaft 7 (see FIG. 7).

Then, the used injection needle 30 falling down the hollow interior 7a of the rotary hollow shaft 7 passes through the collection hole 25a and is housed in the collection container 25 (see FIG. 7). A cap of the collecting hole 25a is mounted on the upper surface of the collecting container 25, and is used to close the collecting hole 25a when the used injection needle 30 is full in the collecting container 25. .

[0035]

The procedure for removing the used injection needle 30 from the syringe will be described. FIG. 8 shows the procedure. First, a used syringe is inserted from the used injection needle 30 side through the injection needle insertion port member 2 arranged on the top surface 1a of the main body case 1. The injection needle insertion port member 2 is interlocked with a start switch, and when the used injection needle 30 is pushed therein, the power source 19 is started, and the rotational motion is transmitted to the driven member 8. As the driven member 8 rotates, the pivoting end portions 22 of the locking claw members A move in the rotational direction.

The free ends A ₁ , A ₁ ,... Penetrate through the side through holes 7 c, 7 c,. Therefore, the free swinging ends A ₁ , A ₁ ,... Come close to each other from a discrete state, and hold the tip 30 a of the used injection needle 30.

The free ends A ₁ , A ₁ ,... Of the locking claw members A, A,.
.. While being held in the rotating direction together with the driven member 8, the locking claw members A, A,... The driven member 8 and the locking claw members A, A,... Rotate the tip portion 30 a to remove the tip portion 30 a of the used injection needle 30 from the syringe barrel 31.

Next, the driven member 8 rotates the power source 19 in the reverse direction, so that the holding state of the tip portion 30a can be released. Then, the tip portion 30a falls through the inside of the rotary hollow shaft 7 from the locking claw members A, A,... And is collected as it is through the collection hole 25a of the collection container 25. Then, when the used injection needle 30 is full, the collection hole 25a
Is removed from the main body case 1, the collection hole 25a is closed with the attached cap 26, and the entire collection container 25 is disposed.

[0039]

According to the first aspect of the present invention, there is provided a rotary hollow shaft 7 having a plurality of side through holes 7c formed at equal intervals on an outer peripheral side surface, and the rotary hollow shaft 7 is rotatably mounted in a circumferential direction of the rotary hollow shaft 7. The driven member 8 is pivotally supported by the driven member 8 so as to be swingable, and the distal end portion of the driven member 8 penetrates through the side through hole 7 c of the rotary hollow shaft 7 so as to be close to each other inside the rotary hollow shaft 7. And a plurality of swinging locking claw members A for holding the used tip 30a of the used injection needle 30 in the used injection needle disposal device. the end a _1,
A holding portion 20 for holding the tip portion 30 a of the used injection needle 30, and a portion which is appropriately separated from the tip of the holding portion 20 and at which the locking claw member A protrudes from an approaching side at an acute angle;
Ribs 30a ₁ , 3 formed around the tip portion 30a
0a ₁ ,..., And the corner formed by the locking projection 21 and the holding portion 20 is formed substantially at a right angle, and the tip portion 30a of the holding portion 20 is formed. The holding surface of the rib 3 is formed around the tip portion 30a.
0a _1, 30a _1, by which a retaining structure in the ... contact can be formed in a substantially arcuate shape comprising spent needle destruction apparatus along the ribs 30a _1, 30a _1, ... number of different various Used needle 3 consisting of a tip 30a
These can be disposed of, corresponding to 0.

The above effect will be described in detail.
The swing is formed between the locking projection 21 the free end faces 20 to A _1, the ribs 30a _1, 30a ₁ of the faced portion 20 is tip portion 30a, ... become the outer end to Hoboto contact state , The locking projections 21 serve as guides for locking to any of the ribs 30a ₁ , 30a ₁ ,..., So that the locking claw members A, A,. Can be performed extremely smoothly.

The locking projection 21 and the holding portion 20
Corner portion formed between the substantially by the right angles, when the locking projection 21 is engaged with the ribs 30a _1, had 20
And a state in which the locking projection 21 is embracing reliably ribs 30a _1, further more the holding state with respect to the tip portion 30a,
The tip portion 30a of the holding portion 20 can be made stable.
The holding portion 20 can perform a good guide for the locking projection 21 to be locked to the tip portion 30a by forming the surface for holding the shape in an arc shape. That is, holding part 2
Since 0 is an arc, the rib 30 of the tip portion 30a
a ₁ , 30a ₁ ,... can be brought into a substantially continuous contact state, and the ribs 30a ₁ , 30a
The bite into ₁ ,… becomes even better.

Next, according to a second aspect of the present invention, in the first aspect, the distal end of the locking projection 21 has a locking structure in a used injection needle discarding device having a sharpened shape. , Ribs 30a ₁ , 3 around tip 30a
0a ₁ ,... Can be more easily digged in, and the operation time until the digging can be shortened.

[Brief description of the drawings]

1A is a perspective view of a main part of a used needle disposal device, FIG. 1B is a plan view of a main part of the used needle disposal device, and FIG. Part perspective view

FIG. 2 is an exploded perspective view of a main part of the used injection needle disposal device with a part cut away.

FIG. 3 (A) is a side view of a main part of a used needle disposal device in a partial cross section, and FIG. 3 (B) is a longitudinal sectional side view of a main part of a used injection needle disposal device.

FIG. 4A is a view showing a state in which the tip of the locking claw member is away from the center; FIG. 4B is a view showing a state in which the tip of the locking claw member is concentrated at the center;

FIG. 5 (A) is a view showing a state in which a locking claw member holds a chip portion in a rotary hollow shaft. FIG. 5 (B) is a state in which the locking claw member is locked to a rib of the chip portion in FIG. Enlarged view of

FIG. 6A is a view showing a state in which a locking claw member clamps a tip portion in a rotary hollow shaft. FIG. 6B is a view showing a state in which the locking claw member is locked to a rib of the tip portion in FIG. Enlarged view of

FIG. 7 is a longitudinal sectional side view of a used injection needle disposal device.

FIG. 8 is an operation diagram showing a process of removing a used injection needle from a syringe.

FIG. 9A is a perspective view showing a general injection needle and X _{1 ９} .
X ₁ arrow end view (B) is a side view showing a general syringe barrel tip and another type of needle (C) is X ₂ ─X ₂ arrow end view of (B) (D) is (B) X ₃ ─X ₃ arrow end view

FIG. 10A is a diagram showing a state in which a known driven portion toothed flat plate sandwiches a chip portion. FIG. 10B is a diagram showing a known driven portion toothed flat plate having worn a rib of a tip portion. C) is an enlarged view showing that a known driven portion toothed flat plate cannot be locked to a thick rib, and FIG. D is a known driven portion toothed flat plate having a large number of ribs in a tip portion. State diagram showing that it is impossible to lock

[Explanation of symbols]

7 ... rotary hollow shaft 7c ... side through hole 8 ... driven member A ... locking claw members A ₁ ... swinging free end 20 ... faced portion 21 ... locking projection 30 ... needle 30a ... tip portion 30a ₁ …rib

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Masaaki Meguro 6-9-1, Fukuda, Yamato-shi, Kanagawa Prefecture, within 21-Istan Giken Co., Ltd. (56) References JP-A-9-224985 (JP, A) (58) ) Surveyed field (Int.Cl. ⁷ , DB name) A61G 12/00 A61M 5/32

Claims (2)

(57) [Claims] 1. A rotating hollow shaft having a plurality of side through holes formed at equal intervals on an outer peripheral side surface, a driven member rotatably mounted in a circumferential direction of the rotating hollow shaft, and the driven member. And a tip end portion penetrates through a side through hole of the rotary hollow shaft so as to pinch a used injection needle mounting tip portion close to each other inside the rotary hollow shaft. A plurality of oscillating locking claw members for use in a used injection needle disposal device, wherein the oscillating free end of the locking claw member is for holding a tip portion of a used injection needle. A holding portion, and a locking projection protruding from a side where the locking claw member is proximate at an appropriate distance from the tip of the holding portion and protruding from an adjacent side to lock with a rib formed around the tip portion; , The locking projection
And the corners between the holding portion and the holding portion should be substantially right-angled.
The holding surface of the tip portion of the holding portion is around the tip portion.
It is formed in a substantially arc shape that can contact along the rib formed in
Locking structure in the spent needle destruction apparatus characterized by comprising been. 2. The locking structure in a used injection needle disposal device according to claim 1, wherein the tip of the locking projection 21 has a sharp shape.