JP2000185049A - Plastic tweezers - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide plastic tweezers inexpensive, particularly suited for disposable use allowing for sanitary management, and having enhanced serviceability. SOLUTION: When two gripping pieces 12, 13 into which a base part 11 is bifurcated are held in a closing direction to grip an article between gripping parts 12a, 13a at their respective tip ends, two streaks of projecting pieces 14a, 14b are raised horizontally parallel to each other on the inner opposite surface of the one gripping piece 12 to provide a guide groove 14 of a recessed cross section. A streak of projecting piece 15a to be engaged in the guide groove 14 while having a length corresponding to the guide groove 14 is raised from the inner opposite surface of the other gripping piece 13 to provide an engaging projecting piece 15 of a projecting cross section. The engaging projecting piece 15 is guided into the guide groove 14 following the closing movements of the gripping pieces 12, 13, and is gradually engaged therein from the base part 11. The guiding movement forces the gripping pieces 12, 13 to be aligned in the proper direction and closed to smoothly grip the article without the gripping parts 12a, 13a at the tip ends deviating from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to plastic tweezers which are inexpensive and are particularly suitable for use as disposable medical devices for sanitation.

[0002]

2. Description of the Related Art In recent years, in medical practice, tweezers such as injection needles and catheters have also been avoided from being shared by a plurality of patients in order to prevent infection between patients. Tweezers are one of the indispensable medical devices for holding gauze, cotton wool, bandage, and sutures of affected area during treatment or surgery.

In general, tweezers have often been made of metal such as stainless steel, but they are expensive and uneconomical for disposable use. In this sense, inexpensive plastic tweezers that can be disposable are attracting attention. ing. However, while plastic tweezers have such advantages, they lack the necessary strength as compared with metal tweezers, and have weakness in terms of rigidity. Therefore, there is an inconvenience in terms of use that when the articles are sandwiched between the sandwiching portions on both sides, the sandwiching portions are liable to be shifted alternately.

Japanese Patent Application Laid-Open No. Hei 5 (1998) -53566 proposes a technique proposed to prevent the holding portion of plastic tweezers from shifting.
There is a plastic tweezer described in 146647. This is shown in FIG. 3, which has a pair of opposing holding pieces 1, 2 that are bifurcated from the base, and a convex projection 3 is provided on the inner surface of one holding piece 1. A concave engaging hole 4 is provided on the inner surface of the other holding piece 2. When the gripping pieces 1 and 2 of the plastic tweezers are gripped in the closing direction to sandwich the article, the convex projections 3 on one side and the concave engaging holes 3 on the other side are aligned and engaged with each other, whereby the gripping is performed. The structure is such that the tip portions 1a and 2a of the pieces 1 and 2 are prevented from being alternately shifted (indicated by a two-dot chain line in the figure).

[0005]

However, in the conventional plastic tweezers shown in FIG. 3 described above,
There are the following problems to be solved.

One is that it is difficult to perform an unconscious one-touch operation because the convex protrusions 3 on one side and the concave engaging holes 4 on the other side are brought into uneven engagement such as almost point contact with each other.

[0007] One is that the projections 3 and the concave engagement holes 4 such as the above-mentioned point contact are located in the longitudinal direction up to the tips of the holding pieces 1 and 2, so that the engagement is difficult. The usability of the system is affected. That is, when the convex projections 3 and the concave engaging holes 4 are set at portions close to the bases of the holding pieces 1 and 2, the projections and depressions are more easily engaged, but the tips 1a and 2a are more likely to shift alternately. . On the other hand, the front end portions 1a, 2 of
a, it is easy to engage the concave and convex portions and the tip portions 1a and 2a are hard to be disengaged.
Are likely to be staggered alternately.

As another problem, because of the usability of an instrument called tweezers, the holding pieces 1 and 2 are formed into thin pieces having flexibility rather than being thick. Drilling the concave engaging hole 4 in a part of the sandwiching pieces 1 and 2 of such a thin thin piece tends to cause insufficient rigidity in terms of strength.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a plastic tweezer which is inexpensive, is suitable for disposable use in consideration of hygiene management, and has improved usability.

[0010]

According to a first aspect of the present invention, there is provided a plastic tweezer which is closed by gripping a pair of opposing holding pieces branched from a base portion into two, and holding a tip of the holding pieces. In order to hold the article between the two holding pieces, the two holding pieces having the required length in the longitudinal direction are set up in parallel on the inner facing surface of the one holding piece, and a cross section is formed between the two holding pieces. A concave guide groove is provided, and an engaging projection piece having a length corresponding to the guide groove in the longitudinal direction and being engageable with the guide groove is formed on the inner facing surface of the other holding piece. The engaging projections are guided by the guide grooves and gradually engaged from the base side following the closing operation of the pair of holding pieces, so that the pair of holding pieces are shifted alternately over the entire length. Without being forcibly guided and closed It is configured to operate.

With the above arrangement, when closing the pair of holding pieces and holding the article between the holding portions at the tips thereof, the engaging projection is guided by the guide groove and follows the closing operation of the holding pieces. Engage gradually from the side over the entire length. Due to the linear engagement between the engaging projection and the guide groove, the pair of holding pieces are forcibly aligned in the appropriate direction without being alternately shifted over the entire length and the closing operation is performed. Therefore, even in the holding portion at the tip of the holding piece, staggering is prevented, the article can be held properly, and various treatments can be performed smoothly.

According to a second aspect of the present invention, in the plastic tweezers, the protrusion height of each of the projections forming the guide groove and the engagement projection is higher at the end on the base side and in the longitudinal direction. It is characterized by being inclined low toward the end on the front side.

[0013] With the above construction, by forming the rising height of each of the guide grooves and the engaging projections on the base side to be high, the ends of both projections slightly overlap each other in the unused state. Or the ends of both prongs can be faced at a close distance. As a result, the engagement between the guide groove and the engaging projection is accelerated on the base side, and then gradually fits in the longitudinal direction like a tool scissor or a scissor, and a pair of the front end holding portions are not shifted alternately. The holding piece can be closed.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a plastic tweezer according to the present invention will be described in detail with reference to the drawings.

FIG. 1 and FIG. 2 are an overall perspective view and a side view showing a tweezers 10 of the present embodiment. A pair of opposing holding pieces 12, 13 branched into a forked shape from the base 11 by molding using a suitable plastic material.
have. The inner surface of one holding piece 12 has a base 11
The two projecting pieces 14a, 14b having a required length in the longitudinal direction from the front end to the holding portion 12a of the tip are raised in parallel to the left and right, and a guide groove 14 having a concave cross section is provided between the projecting pieces 14a, 14b. ing. Also, the other holding piece 1
Also on the inner surface of 3, in the longitudinal direction from the base portion 11 toward the holding portion 13a at the tip, a single protruding piece 15a having a length sufficient to engage with the guide groove 14 on the one side is raised, An engaging projection 15 having a convex cross section is provided.

The two parallel protruding pieces 14a and 14b forming the guide groove 14 on one side can be formed in a linear shape in the longitudinal direction, and the inner surface of the holding piece 12 curved and formed with an appropriate curvature. Can also be formed in a curved shape in accordance with the warpage. Similarly, one protruding piece 15a forming the other side engaging protruding piece 15 also has a linear shape in the longitudinal direction or a curved shape according to the curvature of the inner surface of the holding piece 13 which is curved and formed with an appropriate curvature. Is formed. Nipping piece 1
Nos. 2 and 13 are shaped so that an appropriate elastic holding force can be obtained by bending.

When the holding pieces 12 and 13 are not used and the holding pieces 12 and 13 are open, the ends of the two protrusions 14a and 14b forming the guide groove 14 near the base 11 and the engagement protrusion 1 are formed.
The end of the single projecting piece 15a forming the part 5 near the base 11 is overlapped with each other or formed so as to face each other at a short distance. In other words, the two projecting pieces 14a, 14b and the single projecting piece 15a are gradually expanded from their ends near the base 11 toward the front in the longitudinal direction, and are gradually overlapped and closed as if by a shearing action. A groove movement like a sword or a scissor is possible.

The two projecting pieces 14 on the guide groove 14 side
a, 14b and the protruding piece 15a on the side of the engaging protruding piece 15 have a larger rising height h1 at the end near the base 11, and a rising height h2 at an end farther from the base 11; May be made smaller to form a protruding piece shape that is inclined downward toward the longitudinal direction. With such a shape of the protruding piece, the guide groove 14 and the engaging protruding piece 15 can be smoothly and gradually overlapped with each other from the base side to the tip end like a tool scissor or a scissor.

As shown in the drawing, non-slip notches 12b and 13b for gripping are formed on the outer sides of the holding pieces 12 and 13, respectively, and anti-slip notches are also provided on the opposing inner surfaces of the front holding portions 12a and 13a. Notches 12c and 13c are provided.

Therefore, with the above configuration, the plastic tweezers of the present embodiment grips the holding pieces 12 and 13 at the time of use, and holds the holding sections 12 a and 13 at the distal ends.
A product is sandwiched between a.

In the initial operation of starting to clamp an article,
When the holding pieces 12, 13 are operated in the direction of closing each other against the elasticity by the gripping force of the user, the two protrusions 14a, 14b on the guide groove 14 side and the one protrusion 15a on the engagement protrusion 15 side.
The ends close to the base 11 are first overlapped with each other. When the closing operation by the holding pieces 12 and 13 progresses, the two projecting pieces 14 on the guide groove 14 side are adapted accordingly.
A single protruding piece 15a on the engaging protruding piece 15 lengthens the overlap between the a and 14b. That is, the engaging projections 15 are guided by the guide grooves 14 and gradually engage over the entire length of the projections.

By the linear engagement between the guide groove 14 and the engaging projection 15, the closing operations of the holding pieces 12, 13 are forcibly aligned in an appropriate direction without being alternately shifted. It is possible to carry out the required treatment, etc., by accurately holding the article without the holding sections 12a and 13a being staggered.

In the present embodiment, the guide grooves 14 and the engagement projections 15 are formed on the inner surfaces of the flat holding pieces 12 and 13 by the required lengths, and the projections extend in the longitudinal direction. Since it is formed of, it is effective in enhancing the rigidity of the holding pieces 12, 13 themselves.

[0024]

As described above, in the plastic tweezers according to the present invention, the pair of opposing holding pieces are forcibly aligned in an appropriate direction by the engagement between the guide grooves and the engaging projections, and the closing operation is performed. Accordingly, the holding portions at the distal ends are not staggered, and are excellent in usability of accurately grasping an article and performing a required operation, and are particularly suitable as a low-cost disposable medical device.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a plastic tweezers according to an embodiment of the present invention.

FIG. 2 is a side view showing the plastic tweezers of the present embodiment.

FIG. 3 is an overall perspective view showing a conventional plastic tweezers.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Tweezers made of plastic 11 Main body base 12, 13 Nipping piece 12a, 13a Tip holding part 14 Guide groove 14a, 14b Projection piece of guide groove 15 Engagement projection piece 15b Projection piece

Claims (2)

[Claims] 1. A plastic tweezers for gripping and closing a pair of opposing holding pieces branched from a base into two, and holding and holding an article between holding portions at the tips of the holding pieces. On the inner facing surface of the one holding piece, two projecting pieces having a required length in the longitudinal direction are raised in the left-right direction to provide a guide groove having a concave cross section between the two projecting pieces, and to hold the other holding piece. The inner opposing surfaces of the pieces are provided with engaging protrusions having a length corresponding to the guide grooves in the longitudinal direction and having a convex cross section that can be engaged with the guide grooves, and a closing operation of the pair of holding pieces. The engaging projections are guided by the guide grooves and gradually engaged from the base side, so that the pair of clamping pieces are forcibly guided and closed without being staggered over the entire length. A plastic characterized in that Tick tweezers. 2. A rising height dimension of each of the projecting pieces forming the guide groove and the engaging projecting piece is such that the end on the base side is higher and is inclined lower toward the end in the longitudinal direction. The plastic tweezers according to claim 1, wherein the tweezers are provided.