JPH0155032B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to improvements in scissors, and particularly to scissors with a constant cutting length and sharp cutting taste.

Prior art and its problems As shown in FIGS. 9 and 10, conventional scissors have a double-edged body 10 having cutting blade portions 101 and 201.
However, such scissors generally have the following problems.

The opening angle of the scissors is determined by the opening angle between the thumb and other fingers of the one hand that operates the scissors (for example, the right hand if you are right-handed).During normal operation, the ends of the cutting blades 101, 201 are As shown in FIG. 10, cutting of the paper or cloth 4 is started in the overlapping state, creating a so-called dead space.
Therefore, the cutting length per stroke varies depending on the degree of opening of the scissors, making it impossible to obtain a constant cutting length.

In addition, the pivot point 300 which becomes the fulcrum of the scissors in this way
The inability to effectively utilize the terminal end of the cutting blade portions 101, 201 closest to the blade means that the portion with a large cutting force cannot be utilized, and the structure is not capable of producing sufficient sharpness.

OBJECTS OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and provide scissors that can maintain a constant cutting length per stroke and have sharp cutting ability.

DETAILED DESCRIPTION OF THE INVENTION In order to achieve the above object, the present invention provides scissors in which each blade body includes a cutting blade part, a pivot part, and a finger grip part, in which the blade line of the cutting blade part is almost a double-edged blade. It extends toward the pivot point of the pivot point and terminates at the end of the pivot portion on the cutting blade side, and is formed so that the vicinity of the end of the blade line of the cutting blade portion slightly overlaps when the double blade body is closed, Thus, the present invention provides scissors characterized in that when the scissors are opened before the start of cutting, the end face of the pivot portion near the end of the blade line acts as a stopper for the object to be cut.

The present invention has various modifications, and in the first embodiment, the finger hook part of the blade is bent in either the left or right direction from the central axis of the scissors when the two blades are closed. In the second embodiment, a scale is provided on the cutting blade portion of at least one of the blade bodies.

Further, in the third aspect, the finger hook provided on each of the double-edged blades can move the inserted finger closer to or away from the pivot part to move the position of the point of force of the scissors. It has a structure with an opening.

Embodiments Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

A first embodiment is shown in FIGS. 1 and 2.

In this embodiment, each blade body 1, 2 comprises a cutting blade part 11, 21, a pivot part 3, and a finger rest part 12, 22, respectively. Each blade body has a sharp tip, and a cutting edge formed on one side of the cutting blade portions 11 and 21;
That is, unlike conventional scissors, the blade line extends from the tip almost toward the pivot point of the double blade body (the center point of the pivot portion 3). Further, the blade line terminates at the end of the pivot portion on the cutting blade side. The reason for this is that, as best shown in FIG. 2, when the scissors are opened before the start of cutting, the end face of the pivoting portion near the end of the blade line is used as a stopper for the object to be cut. Further, as shown in FIG. 1, the cutting blade portion is formed so that the vicinity of the end of the blade line of the cutting blade portion slightly overlaps when the double blade body is closed. The reason for this is that with such a configuration, when the double-blade body is opened to the normal cutting start angle before cutting, the blade line of the cutting blade part separates and the end face of the pivot part that acts as a stopper between the blade parts appears. This is because there will be no dead space. For this reason,
When cutting continuous lengths of paper, cloth, etc., the cutting length per stroke is 1
Since it can be cut over the entire part of 1 and 21, the cutting length per stroke can be maximized and kept constant.

Furthermore, when starting cutting work using such scissors, the ends of the cutting edges of the cutting blade parts 11 and 21 of the double-edged bodies 1 and 2, which have the largest cutting force, will cut into the paper or cloth 4. Therefore, the cutting quality will also be sharp.

3 and 4 show a second embodiment of the present invention, in particular, when the double blade bodies 1 and 2 are closed, the cutting blade portions 11 and 21 move rightward from the central axis A of the scissors. Although it has a bent shape, the blade lines of the cutting blade parts 11 and 21 of the double-edged blade bodies 1 and 2 extend almost toward the pivot point, and the edge on the cutting blade side of the pivot part extends. At the same time, the vicinity of the end of the blade line of the cutting blade portion overlaps slightly when the double blade body is closed.

In the example, when a right-handed person performs cutting work while standing, the blade 1,
Since the second cutting blade portions 11 and 21 face upward, the cutting operation becomes easier. If the scissors are configured for left-handed users, they may be bent leftward from the central axis A.

The outer periphery 13 (arc-shaped outer periphery of the boss portion) of the pivot portion located at the end of the cutting blade portion 11 of the blade body 1 is designed to protect the object to be cut when the double blade bodies 1 and 2 are opened to start cutting. It acts as a stopper that fixes the cutting start point of the scissors by abutting the ends, etc.
If the outer periphery of the pivot portion is formed in an arc shape in this way, the position of the stopper will not change depending on the opening angle of the scissor blades 1 and 2.

FIG. 5 shows still another example of the present invention, in which scale markings 5 are engraved on one abdomen 14 of the blade body, and the markings are used as a scale during cutting work. This allows the cutting length to be the desired size. This embodiment has the advantage that when cutting an object to a predetermined size, it is possible to save the trouble of marking the object with a ruler or the like in advance. In the figure, the scale 5 is formed on the abdomen of one of the blades 1, but the scale 5 may be provided so as to extend to the outer end surface 15 if necessary.

FIG. 6 and FIG. 7 show an example in which the present invention is applied to garden shears.

A feature of this embodiment is that the length dimensions of the blade bodies 1' and 2' are smaller than those of the paper cutting scissors described above.

The finger hooks 12' and 22' also include finger insertion openings 12''b and 22'' that allow the position of the force point of the scissors to be moved by moving the inserted fingers closer to or away from the pivot portion 3, respectively. 22'b,
Put your thumb in the finger rest 12', and put the other 4 in the finger rest 22'.
Use it by inserting your second finger. Finger rest part 12', 2
2' has a corrugated recess 12'a, 2' for stopping the hooked finger.
2'a is provided. When in use, as shown in Fig. 6, insert your fingers into the bases of the finger rests 12', 22', increase the opening angle of the blade bodies 1', 2',
Pinch the stems 6 of plants, etc. After pinching the stem 6 of the plant, as shown in FIG.
Slide the finger inserted in 2' towards the tip and insert the blade 1',
2' is closed and the stem 6 of the planted plant is cut. According to this embodiment, when pinching the stem 6 of a plant, etc.,
The thumb is moved toward the base of the finger rest 12', and the point of force approaches the scissors' pivot point 3 (fulcrum), and as a result, the blade 1
The opening angle of scissors 1' and 21' can be increased, and when cutting the pinched plant stem 6, the thumb moves toward the tip of the finger hook 12', and the point of effort is placed on the pivot point 3 of the scissors.
Since the cutting force of the blade bodies 1' and 2' increases by moving to a farther position, cutting becomes easier.

The present invention is not limited to the above-described embodiments, but may be modified as appropriate for right-handed, left-handed, etc., and may be used with garden shears, tin shears, etc. depending on the object to be cut. It is used as

Effects of the Invention The scissors of the present invention has the following effects due to its structural features.

1) Dead space can be effectively used without creating dead space at the end of the cutting blade of the double-blade body, so the cutting length per stroke can be maximized and kept constant. Therefore, when cutting a long object, the number of cutting strokes is reduced, making the cutting operation easier.

2) The end of the blade line of the cutting blade closest to the fulcrum (pivot part) of the scissors cuts into the object at the start of cutting, so the cutting force increases and the cutting quality becomes sharp. Therefore, it is suitable not only for cutting paper, cloth, etc., but also for cutting objects that are harder than these, and can also be used as garden shears, tin pegs, etc.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a first embodiment of the present invention, Fig. 2 is an explanatory diagram of its usage state, Fig. 3 is a diagram of a second embodiment showing the scissors in a closed state, and Fig. 4 is a diagram of the scissors in a closed state. A diagram showing the opened state, FIG. 5 is a diagram of the third embodiment, FIG. 6,
Fig. 7 is an embodiment of the scissors of the present invention applied to garden shears, Fig. 8 is an explanatory diagram of the main part of another example of the present invention, Fig. 9 is an example of the conventional scissors, and Fig. 10 is It is an explanatory diagram of the usage state. (Explanation of symbols) 1, 2...blade body, 11, 21,
11', 21'...cutting blade part, 12, 22, 12',
22'...Finger hook part, 3...Pivot part (set screw), 4...
scale.

Claims (1)

[Scope of Claims] 1. Scissors in which each blade body consists of a cutting blade part, a pivot part, and a finger grip part, in which the blade line of the cutting blade part extends approximately toward the pivot point of both blade bodies. It terminates at the end of the pivoting part on the side of the cutting blade, and is formed so that when both blades are closed, the edges of the blade line of the cutting blade overlap slightly, so that it is difficult to open the scissors before starting cutting. The scissors are characterized in that the end face of the pivoting portion near the end of the blade line acts as a stopper for the object to be cut. 2. Claim 1, characterized in that the finger hook has a structure bent in either the left or right direction from the central axis of the scissors when the double-blade body is closed.
Scissors as described in section. 3. The scissors according to claim 1 or 2, characterized in that a scale is provided on the cutting blade portion of at least one of the blade bodies. 4. Claim 1, characterized in that each finger rest has a finger insertion opening that allows the inserted finger to move closer to or away from the pivoting part to move the position of the point of force of the scissors. Scissors described in.