JPH0511911U - Pinset - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a tweezer made of synthetic resin capable of reliably and stably pinching a target object without causing a knob portion to shift back and forth or up and down to cause misalignment. [Structure] From a horizontal projecting edge 9 and a vertical projecting edge 10 on the inner side of one arm part piece 2 of two arm part pieces 2 and 4 having knob parts 1 and 3 at the tip and connected at a base end 5. And the two engaging protrusions 12 and 13 are formed on the inner side of the other arm piece 4 so as to protrude.
The upper and lower surfaces of the lateral projecting edge 9 are overlapped with each other to prevent vertical displacement, and the locking projecting edges 12 and 13 are brought into contact with the front and rear surfaces of the vertical projecting edge 10 to prevent back and forth displacement. It is a thing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pair of synthetic resin tweezers suitable for disposable use, which is used for medical treatment in surgery, dentistry, and the like.

[0002]

[Prior Art]

 Traditionally, tweezers used for medical treatment have been made of metal in terms of long-term use and resistance to boiling sterilization, but if sterilization or disinfection is imperfect, bacteria that are highly resistant to chemicals and heat will be used. However, since the virus can be transmitted to other patients and in some cases life-threatening, it has become desirable to discard the tweezers used for one patient without reuse.

Therefore, synthetic resin tweezers, which can be provided at low cost and can be mass-produced and are suitable for disposable use, have come to be partially used. However, the tweezers have the same shape and structure as metal tweezers, that is, a knob on the tip. Since it is a molded product in which two parallel arm parts each having a part are connected at the base end and the knob parts are opposed to each other with the knobs slightly opened, the rigidity is clearly inferior to that of metal. , When the arm part is pinched with the fingertips and pressed, the connecting part is twisted and the tab part is displaced back and forth or up and down, and it is often unusable to hold the object.

Therefore, for the purpose of preventing twisting of the connecting portion and improving elasticity, a spring piece that acts in the direction of opening the knob portion between the two arm portion pieces is installed as a reinforcing member, and the arm portions are A synthetic resin tweezers in which a piece, a connecting portion, and a spring piece are integrally formed is presented in Japanese Utility Model Laid-Open No. 2-98911.

The spring piece of the tweezers disclosed in the above-mentioned publication is intended to improve both rigidity and elasticity. For example, if the spring piece is made strong to increase rigidity, the elasticity is reduced, and therefore both are made compatible. A spring piece of appropriate strength is used.

[0006] Therefore, it is possible to completely eliminate the disadvantage that sufficient rigidity for preventing the shift of the knob portion is not given, and that when the arm piece is sandwiched and held by the fingertip, it is easily displaced when an oblique force is applied. I can't. In addition, when the rigidity is low like this, when the target object is stable and difficult to pinch, for example, when it is a spherical article, it tries to pinch it with a large force, so a slight balance collapse causes a shift, and the pinched article is dropped. It is easy to cause the problem of being lost.

[0007]

[Problems to be solved by the device]

 The problem to be solved by the present invention is that synthetic resin tweezers, which are inexpensive and suitable for disposable use, have poor rigidity, and therefore the knob part easily shifts back and forth or up and down, making it easy to cross the target object. In addition, it is difficult to pinch in a stable manner.

[0008]

[Means for Solving the Problems]

 The present invention occurs when tweezers made of a synthetic resin are made of synthetic resin, in which two arm pieces each having a knob portion at the tip end are substantially parallel to each other and the knob portions are opposed to each other with the knob portions slightly apart from each other and are connected at the base end. In order to solve the problem, an end face + type engaging projection edge composed of a horizontal projection edge and a vertical projection edge is formed to project inside one arm piece, and lateral projection is performed on both sides sandwiching the vertical projection edge. The locking projections that overlap the edges on the opposite sides are formed so as to project inside the other arm piece.

[0009]

[Action]

 When pressing the outer surface of the arm piece with your fingertips to bring the knob closer, the locking projection overlaps the upper and lower sides of the opposing horizontal projection to prevent vertical displacement, and It contacts the front and back surfaces of the ridge to prevent back and forth slippage and pinches the target object such as absorbent cotton, gauze, chemicals, or the affected part, and allows the target object to be pinched without making the knob part cross each other. The purpose is achieved.

[0010]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. Two arm pieces 2 and 4 having knobs 1 and 3 at the tip are arranged substantially parallel to each other, and the knobs 1 and 3 are slightly separated from each other. In a state of facing each other, the base ends are connected to each other by a connecting portion 5 which is curved in a semicircular shape.

The arm portions 2, 4 and the connecting portion 5 have a thin cross-section plate 6 which is continuous over the entire length, and a reinforcing rib 7 which is provided on the inner side of the thin back plate 6 so as to project along the center for almost the entire length. It is formed in a T-shape, and is provided on the outer surface of the arm pieces 2 and 4, and the back plate 6 is provided with a non-slip concavo-convex strip 8.

On the inner side of the central portion of the one arm portion 2, a lateral projecting edge 9 having an appropriate width formed by extending a rib 7 and a vertical projecting edge 10 having substantially the same height as the back plate 6 extending from the back plate 6 are formed. An end face + shaped engaging protrusion 11 is formed so as to protrude toward the other arm piece 4. Further, inside the central portion of the other arm piece 4, the lower surface is in the same plane as the upper surface of the rib 7 and has an appropriate width, and the projecting edge 12 and the upper surface is in the same plane as the lower surface of the rib 7 and is in an appropriate width. The protruding edge 13 has a gap 14 approximately equal to the thickness of the vertical protruding edge 10 in the front and back, and has a step substantially equal to the thickness of the rib 7 in the upper and lower sides to project toward the arm piece 2.

The vertical projecting edge 10 and the gap 14 are formed in an arc shape on a circle centered on the connecting part 5, and the arm pieces 2, 4, the connecting part 5, the engaging projecting edge 11 are formed. The locking projections 12 and 13 are integrally formed of synthetic resin.

In the embodiment shown in FIG. 1 to FIG. 4, the engaging projecting edge 11 and the engaging projecting edges 12 and 13 are slightly apart from each other in a state where the arm pieces 2 and 4 are not clamped and held, and the lateral projecting edge 9 The tips of the locking projections 12 and 13 are formed to be gradually thin so that they smoothly overlap with each other without hitting each other.

When the outer side surfaces of the arm pieces 2 and 4 are sandwiched and pressed by fingertips to overcome the elastic force of the connecting portion 5 and to be compressed, the lateral upper edge 9 of the front portion and the rear portion of the front edge of the vertical edge 10 of the horizontal edge 9 are compressed. The lower surface and the front and rear locking projections 12 and 13 are overlapped with each other so that the knobs 1 and 3 are brought close to each other, and the absorbent cotton, the gauze, the medicine or the affected part is pinched.

According to this embodiment, as soon as the arm pieces 2 and 4 start to approach each other, the lateral projecting edge 9 and the locking projecting edges 12 and 13 immediately overlap with each other on the opposite surfaces, and at the same time, the front surface of the vertical projecting edge 10 and The rear surface and the rear and front edges of the locking projecting edges 12 and 13 come into contact with each other, and even if a force in an oblique direction is applied to the arm pieces 2 and 4, they prevent twisting from each other, and the knob portions. There is no need to shift 1 and 3 up and down and back and forth to mix them up (Fig. 4).

In the embodiment shown in FIGS. 5 and 6, engaging protrusions 16 and 17 are formed on the upper surface of the leading edge of the lateral projecting edge 9 and the lower surface of the leading edge of the rear part of the lateral projecting edge 9, and Locking projections 18, 19 are formed on the lower surface of the front edge of the front locking projection 12 and the upper surface of the front edge of the rear locking projection 13, and these are hooked and engaged with each other.

Further, in the embodiment shown in FIG. 7, engaging protrusions 21 and 22 are formed on the front surface of the leading edge of the vertical projecting edge 10 above the lateral projecting edge 9 and on the rear surface of the leading edge of the lower part thereof, and The locking projections 12 and 24 are formed on the rear surface of the front edge of the locking projection 12 and the front surface of the front edge of the rear locking projection 13, and the locking projections 23 and 24 are hooked and engaged with each other.

Further, in the embodiment shown in FIG. 8, engaging grooves 26 and 27 parallel to the vertical projecting edge 10 are formed in both front and rear portions of the horizontal projecting edge 9 with the vertical projecting edge 10 interposed therebetween, and the front locking projection is formed. Locking projections 28 and 29 are formed on the lower surface of the front edge of the edge 12 and the upper surface of the front edge of the rear locking projection 13, and these are hooked and engaged with each other.

According to these embodiments, the two arm pieces 2 and 4 are formed in a wide open state, and by compressing and engaging them, the knob portions 1 and 3 are accurately opened at a constant opening angle. In addition to being able to grip the target object more accurately by being arranged facing each other, but also providing a large elastic force to the connecting portion 5, in addition to preventing twisting by the engaging projection edge 11 and the locking projection edges 12 and 13, It has excellent resilience when the pressing force is released and can withstand repeated use.

[0021]

[Effect of the device]

 The present invention has a structure in which an engaging projection edge and a locking projection edge that face each other do not interfere with the arm pieces of tweezers, which are made of synthetic resin and are inexpensively provided and are suitable for disposable use, do not twist. Therefore, it is possible to pinch the target object securely and stably by shifting the knob part of the tip up and down and back and forth without messing with each other, and even when the deformation due to residual stress during molding locks with the engaging flange. It is corrected by the ridge so that the knobs can be accurately opposed to each other.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an enlarged sectional view taken along line XX of FIG.

FIG. 4 is a front view showing a state in which the tweezers in FIG. 1 are closed.

FIG. 5 is a front partial view showing another embodiment of the present invention.

6 is a cross-sectional view taken along the line YY of FIG.

FIG. 7 is a partial front view showing still another embodiment of the present invention.

FIG. 8 is a front partial view showing still another embodiment of the present invention.

[Explanation of symbols]

 1, 3 Knob part 2, 4 Arm part piece 5 Connecting part 9 Horizontal projecting edge 10 Vertical projecting edge 11 Engaging projecting edge 12, 13 Locking projecting edge

Claims (1)

[Scope of utility model registration request] 1. A tweezer in which two substantially parallel arm pieces each having a knob portion at a tip end are opposed to each other with the knob portions slightly apart from each other and are connected at a base end,
An end face + type engaging projecting edge composed of a lateral projecting edge and a vertical projecting edge is formed so as to project inside the one arm piece, and is vertically opposite to the lateral projecting edge on both sides of the vertical projecting edge. Locking protrusions that overlap with each other are formed inside the other arm piece,
And tweezers characterized by being made of synthetic resin.