JPH0650758U - Synthetic resin tweezers - Google Patents

Abstract

(57) [Summary] [Objective] To provide tweezers integrally molded with a synthetic resin. [Structure] An intermediate portion of a branch portion 4, two sandwiching portions 2 and 3 extended to one side from the branch portion 4, and a lever portion 4a connected to the branch portion 4 at a distance L from the branch portion 4. Synthetic resin tweezers formed by integrally connecting the inner surfaces of the parts with a connecting body 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of synthetic resin tweezers.

[0002]

[Prior art]

 The tweezers are made of various materials depending on the application. Ordinary tweezers are made of metal for applications that do not handle corrosive substances, but are often not suitable for handling medicinal products. Therefore, materials made of corrosion-resistant metallic materials such as stainless steel and titanium are used, but synthetic resin materials are most commonly used as non-metallic materials.

In many of the tweezers made of synthetic resin, the branch portion which is separated into a V shape and has a spring property is made of a metal plate, and a synthetic resin molded product is used for a portion to which a chemical solution is applied. This kind of tweezers is used effectively as long as the metal part is not corroded, but the number of steps is increased to assemble parts made of multiple materials, and high-grade metal materials are used, which significantly increases the product cost. There is a problem.

[0004]

[Problems to be solved by the device]

 As described above, the conventional tweezers using a part or the whole of the metal material is disadvantageous in terms of manufacturing cost and handleability, and cannot be used for disposable purposes. To solve this problem, tweezers made of synthetic resin such as nylon have been developed. This tweezers is an assembly type in which the base ends of two clamping parts are joined together and the tip parts of the clamping parts are spaced at a specified interval. It can be held.

However, there is a problem when integrally molded. That is, when the branch portion and the two sandwiching portions are integrally molded, a casting phenomenon occurs at the branch portion, and in most cases, the spacing between the sandwiching portions is narrowed. In addition, there is a change with time in the synthetic resin molded product, and the molded product changes its shape subtly, and the branch portion formed by the V-shape at an acute angle can maintain a predetermined shape. Instead, a phenomenon occurs in which the space between the sandwiching parts gradually narrows. Because of this, it was not possible to manufacture synthetic resin tweezers by integral molding.

[0006]

[Means for Solving the Problems]

 The tweezers according to the present invention for solving the problems of the conventional synthetic resin tweezers include a branch portion 4 and two sandwiching portions 2 and 3 extending from the branch portion 4 to one side. The inner surface of the intermediate portion of the lever portion 4a connected to the branch portion 4 at a distance L from the branch portion 4 is connected by a connecting body 8 and integrally formed.

The connecting body 8 is for giving the lever portion 4 a elasticity required by the tweezers, and exerts an excellent elastic force due to the distance L between the branching portion 4 and the connecting body 8. be able to. The width of the connecting body 8 is preferably smaller than that of the lever portion 4a, and is planted in the middle portion of the width of the lever portion 4a.

[0008]

[Work]

 Since the intermediate portions of the lever portions 4a are connected to each other by the connecting body 8, the distance between the two lever portions 4a is kept constant, and even when the branch portions 4 contract during molding, the lever portions 4a are also contracted. The gap d between the 4a can be maintained, and the fulcrum of the lever portion 4a can be formed to give elasticity to the root portions of the holding portions 2 and 3 so that the tweezers 1 hardly feels uncomfortable in use, and the tip portion There is no such thing as an abnormal narrowing.

[0009]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of the synthetic resin tweezers 1, FIG. 2 is a side view of the same, and FIG. 3 is a partially enlarged perspective view. This tweezers 1 is integrally formed of synthetic resin such as nylon, ABS or polycarbonate in a state where the two holding portions 2 and 3 are connected in a V shape at the branch portion 4. Protrusions 5 for preventing slippage are formed on the inner surfaces of the tip end portions of the holding portions 2 and 3, and protrusions 6 are similarly formed on the portions of the outer surfaces on which the fingers abut.

As shown in FIG. 3, a connecting body 8 is provided at an intermediate portion between the branch portion 4 and the lever portion 4 a, which is the root portion of the holding portions 2 and 3. This connecting body 8 holds the gap d between the two facing lever portions 4a, and at the same time, makes the lever portion 4a elastic for opening the holding portions 2 and 3, and has a small width b. Is formed in. In this embodiment, the connecting body 8 has a rectangular cross section as a typical example, but the connecting body 8 is not limited to this and has various sectional shapes such as a circle, an ellipse, and a triangle. Can be used.

When the connecting body 8 is formed to have the full width of the branching portion 4, the connecting body 8 serves as a wall, and the lever portion 4a is divided before and after the wall, and the portion of the connecting body 8 is separated. Since the bases of the holding parts 2 and 3 or the fulcrum of the lever are formed, sufficient elastic force cannot be given for expanding the holding parts 2 and 3. As shown in FIGS. 4 and 5, a guide body 9 is provided on the inner surface of the sandwiching portion 3 in a standing state toward the tips of the sandwiching portions 2 and 3, and its root portion 9a is made thin to provide elasticity. I am. A guide groove 10 is formed on the inner surface of the sandwiching portion 2 facing the guide body 9, and when an article is sandwiched between the sandwiching portions 2 and 3, the tip of the guide body 9 is placed in the guide groove 10. As it is being inserted, it will slide over and fall over. Therefore, during the pinching operation of the tweezers, it is possible to guide the one holding part 3 so that the other holding part 2 does not laterally shift.

The tweezers 1 are molded by injection molding using a synthetic resin such as nylon as described above. At the time of this molding, the column 8 is formed at the same time as the branch portion 4. In other words, a gap d is formed between the two lever portions 4a facing each other, and the gap d is held at a predetermined distance by the pillar 8. On the other hand, during injection molding, shrinkage occurs in each part of the tweezers 1, and even if no shrinkage occurs, a slight change occurs in the shape of each part over time. In the case of the conventional synthetic resin tweezers, the distance between the two clamping parts 2 and 3 is gradually shortened because the means for coping with the shrinkage and changes in size and shape with time is not adopted. In extreme cases, most of the tips of the tweezers, that is, the tips of the holding portions 2 and 3 did not substantially open.

However, in the tweezers 1 of the present invention, the connecting body 8 is erected at an intermediate portion of the lever portion 4a or a portion corresponding to the root of the holding portions 2 and 3, and a predetermined gap d is held in the lever portion 4a. Therefore, it is possible to prevent the shape change of the sharp V-shaped branch portion 4 and the lever portion 4a, and to maintain a predetermined distance D between the two holding portions 2 and 3. You can

Further, the roots of the holding portions 2 and 3 are important portions for giving elastic force for operating the tweezers 1. In the present invention, the connecting body 8 is planted in the middle portion of the lever portion 4a. Therefore, the elasticity of the lever portions 4a is not reduced, and the entire shape of the tweezers 1 can be retained by holding the distance between the lever portions 4a at a predetermined distance d. .

[0015]

[Effect of device]

 The synthetic resin tweezers 1 according to the present invention includes a branch portion 4, two sandwiching portions 2 and 3 extending from the branch portion 4 to one side, and a space between the branch portion 4 and the branch portion 4. The inner surfaces of the intermediate portions of the continuous lever portions 4a are connected by a narrow connecting body 8 to be integrally molded.

Therefore, the distance d between the lever portions 4a following the branching portion 4 does not change during the molding to narrow the distance D between the tips of the holding portions 2 and 3, and the tweezers having an accurate shape. 1 can be integrally molded with a synthetic resin. Further, since the lever portion 4a is held by the connecting body 8, the connecting body 8 can form a supporting point of the lever portion 4a and give a large elastic force to the lever portion 4a.

[Brief description of drawings]

FIG. 1 is a front view of a synthetic resin tweezers.

FIG. 2 is a plan view of a synthetic resin tweezers.

FIG. 3 is a perspective view showing a branched portion, a lever portion following the branched portion, and a connecting body.

FIG. 4 is a side view showing a guide body.

FIG. 5 is a front cross-sectional view showing a guide body and a guide groove into which the guide body is fitted.

[Explanation of symbols]

1 tweezers 2, 3 clamp part 4 branch part
4a Lever part 5,6 Projection part 8 Connection body 9 Guide body 10
Guide groove d Gap

Claims (1)

[Scope of utility model registration request] 1. A branch portion 4, two sandwiching portions 2 and 3 extending from the branch portion 4 to one side, and an interval L from the branch portion 4.
A synthetic resin tweezer formed by integrally connecting the inner surfaces of the intermediate portion of the lever portion 4a connected to the branch portion 4 with a connecting body 8.