JPH0214742Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to scissors, and more particularly to scissors that can smoothly rotate both scissor members and have excellent sharpness.

(Prior Art) Scissors are generally required to have both scissor members smoothly rotate and have excellent cutting ability. However, in order to improve the sharpness of the scissors, in other words, if the two scissor members are brought into close contact with each other so that no gap is formed on the blade side between the two scissor members during cutting, the sharpness will certainly improve, but the frictional force between the two scissor members On the other hand, as the number increases, it becomes difficult to smoothly rotate both scissor members. On the other hand, if a slight gap is formed between both scissors members to reduce the frictional force between the two scissors members in order to rotate the two scissors members smoothly, the cutting ability will deteriorate.

Conventionally, scissors have been known in which a sphere having a bearing around the periphery is fitted onto the inner surface of one scissor member so that both scissors members can be smoothly rotated without deteriorating the sharpness ( Utility Model Publication No. 11767/1983). These scissors are designed to reduce the frictional force between both scissor members on the handle side, and the scissors member to which the sphere is not fitted has only one point on the handle side with the scissor member to which the sphere is fitted. No contact,
Further, when both scissor members are rotated, this sphere rotates, so that both scissor members can be rotated smoothly.

In addition, since the sphere fitted on the inner surface of one of the scissors members protrudes from the inner surface of the scissors member to which the sphere is fitted, both scissors members on the handle side The scissors are pushed wide to form a gap corresponding to the amount of the scissors, and conversely, a force is applied to the cutting point side around the pivot to bring both scissors members into close contact with each other using the pivot as a fulcrum, so that the sharpness does not deteriorate. ing.

(Problem to be solved by the invention) However, in the conventional scissors, by rotating both scissor members, the rotating sphere comes into contact with all of the bearing balls arranged around the sphere. As a result, the ball does not rotate smoothly even when both scissor members are rotated. In addition, the force that tries to bring both scissors members into close contact with each other is
It also has the disadvantage that it is always applied at a position offset from the cutting point, on the extension line of the sphere and the pivot.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to enable smoother rotation of both scissor members and to reduce the force of constantly bringing both scissor members into close contact with the cutting point. To provide scissors with a simple structure and excellent cutting ability.

(Means for Solving the Problems) In order to solve the above problems, the means taken by the present invention are as follows:
21, rolling recesses 13, 23 in which the sliding member 40 rolls are provided on the inner surfaces 12, 22 of the scissors members 10, 20, respectively, along the rotational orbits of the scissors members 10, 20. Cutting point 5 between moving recesses 13 and 23
The scissors 100 are characterized in that a spherical sliding member 40 is interposed so as to be positioned on an extension line between the scissors 100 and the pivot portion 30.

(Effects of the device) By adopting the above measures, the following effects can be achieved.

A rolling recess in which the sliding member rolls is provided on the inner surface of each of the scissor members along the rotational trajectory of both the scissor members, and the sliding member is interposed between the rolling recesses. Since contact occurs only at two points: the rolling recess of one scissor member and the rolling recess of the other scissor member, by rotating both scissor members,
Rotates smoothly. Due to the smooth rotation of the sliding member, the frictional force between the two scissor members on the handle side is significantly reduced.

Further, by arranging the sliding member to be located on the extension line of the cutting point and the pivot portion, a force is constantly applied at the cutting point to bring both scissors members into close contact with each other.

(Example) Hereinafter, the present invention will be described in detail according to an example shown in the drawings.

As shown in FIGS. 1 to 4, the scissors 100 according to the present invention has an inner surface 1 of each of the scissors members 10 and 20 on the handle portions 11 and 21 near the pivot portion 30.
2 and 22, a rolling recess 1 in which the sliding member 40 rolls;
3 and 23 are provided along the rotational trajectory of both scissor members 10 and 20. In addition, these rolling recesses 13, 23
A spherical sliding member 40 is interposed therebetween so as to be located on an extension of the cutting point 50 and the pivot portion 30. Note that this sliding member 40 is similar to the scissors member 10,
In order to rotate by rotating the scissors 20, it is necessary to always contact the rolling recesses 13, 23 of both scissors members 10, and therefore the diameter of the sliding member 40 is set as follows without the sliding member 40 intervening. Rolling recess 1
It must be equal to or greater than the distance between 3 and 23. The diameter of the rolling member 40 is set to the rolling recess 1.
If the distance is greater than the distance between 3 and 23, the handle 11,
Both scissors members 10 and 20 on the 21 side have their rolling recesses 1
3 and 23 to form a space corresponding to the diameter of the sliding member 40. On the other hand, a force is applied to the cutting point 50 side around the pivot 30 to bring the scissors members 10 and 20 into close contact with each other using the pivot 30 as a fulcrum, which improves the sharpness of the scissors.

In this embodiment, as shown in FIG. 3, in order to stabilize the rotation of the sliding member 40, the cross sections of the rolling recesses 13 and 23 are semicircular. The cross-sectional shape of the rolling recesses 13 and 23 is not particularly limited in the present invention. Also,
In this embodiment, as shown in FIG. 4, as the scissors members 10 and 20 are rotated in the closing direction, the force that tries to bring the scissors members 10 and 20 into close contact with each other at the cutting point 50 increases. The rolling recess 1 is made so that the blade side of the rolling recess 13, 23 is shallow.
3 and 23 are provided in an inclined state, but this is not particularly necessary in the present invention.

The sliding member 40 connects both scissors members 10 and 20 so that it is located on the extension line of the cutting point 50 and the pivot portion 30.
The rolling recesses 13 and 23 of one of the scissors members 10 are interposed between the part of the rolling recess 13 of one of the scissors members 10 that is in contact with the sliding member 400, and the other scissors member 20 of the other scissors member 20.
If the coefficient of friction between the rolling recess 23 and the contacting part of the sliding member 40 is made almost equal, and if they are positioned on an extended line during manufacturing, how can both scissors members 10 and 20 be rotated? Even if the sliding member 40
An equal rotational force is applied by both scissors members 10 and 20, and the sliding member 40 always rotates on the extension line of the cutting point 50 and the pivot portion 30.

Although the general scissors 100 has been described in this embodiment, the present invention can be applied to any type of scissors, and the scissors members 10a and 20b can be moved smoothly as shown in FIG. This is effective in the pinking scissors 100a, which particularly requires rotation and excellent sharpness.

(Effect of the invention) As described above, according to the scissors according to the present invention, the rolling recess in which the sliding member rolls is formed on the inner surface of each of the scissors members on the handle side near the pivot part. By providing a spherical sliding member along the rotational trajectory of the scissors and interposing a spherical sliding member between the rolling recesses so as to be located on the extension line of the cutting point and the pivot, the rotation of both scissor members becomes smoother. It is possible to provide scissors with excellent sharpness that constantly applies pressure to the cutting point and has a simple configuration. Therefore, the present invention is particularly effective in pinking scissors, etc., which require close contact between both scissor members at the cutting point, and therefore require the application of a relatively large force during cutting.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing scissors according to the present invention, Fig. 2 is a partially enlarged view of Fig. 1, and Fig. 3 is a -
FIG. 4 is a cross-sectional view of the rolling recess, and FIG. 5 is a cross-sectional view of the pinking scissors according to the present invention. Explanation of symbols, 100... scissors, 10... scissors member,
DESCRIPTION OF SYMBOLS 11...Handle, 12...Inner surface, 13...Rolling recess, 20...Scissors member, 21...Handle, 22...Inner surface, 23...Rolling recess, 30...Pivot, 40 …
...Sliding member, 50...Cutting point.

Claims (1)

[Scope of utility model registration request] A rolling recess in which the sliding member rolls is provided on the inner surface of each of the scissor members on the handle side near the pivot portion along the rotational trajectory of both the scissor members, and a cutting point and a cutting point are provided between the rolling recesses. Scissors characterized in that a spherical sliding member is interposed so as to be positioned on an extension line of the pivot portion.