JPS6287183A - Scissors - Google Patents

Abstract

Known scissors have a separate leaf spring which press the two scissor legs resiliently against one another via the rotary joint. According to the invention, the leaf spring (3) is fashioned from one leg (2) of the scissors (Fig. 2). <IMAGE>

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to scissors with leaf springs acting on the legs.

For example, in German Patent Specification No. 70310,
Scissors are known in which the legs of the scissors are elastically pressed by a separating leaf spring via a rotary connection.

However, this type of scissors requires a considerable amount of money to manufacture, and has the disadvantage that the leaf springs are located on the outside, making them easy to snag or injure, and making them difficult to use.

SUMMARY OF THE INVENTION Therefore, the present invention provides scissors equipped with leaf springs that act on the legs, which do not have the above-mentioned disadvantages or have a simple structure, are easy to handle, and exhibit good cutting characteristics. I set out with the goal of doing something.

This problem can be solved by making the leaf spring integral with the leg. Further, in a preferred embodiment of the present invention, the open end of the leaf spring is provided in the direction of the grip;
Preferably, the leaf spring is provided in the area of the rotating connection of the scissors or on the side of the rotating connection between the rotating connection and the grip.

According to the invention, the leaf spring is made integral with the leg, so that the leaf spring acting on the leg can be used simply without additional fixing means. Alternatively, the shape of ordinary scissors can be maintained as is.

In the embodiment in which a leaf spring is provided in the area of the rotary connection, the effect of the wear surfaces between the rotary connection and the grip can be counteracted by the leaf spring according to the invention, so that they press against each other. This has the advantage that it is possible to avoid a situation where the legs become loose when placed in a certain condition.

In another embodiment of the invention, the leaf spring is provided between the rotary joint and the handle, but
In this case, the spring compression surface becomes substantially straight, so the scissors can perform the cutting operation very flexibly.

In a further preferred embodiment of the invention, the leaf spring in the area of the rotary connection is provided with an extension in the direction of the grip. This allows the legs to act elastically at any point. These points are the rotating connection, the contact point of the scissor blade, and the relative seat between the rotating connection and the grip.

Preferably, the width of the leaf spring is equal to the width of the legs, so that the outer shape of the scissors can be maintained. However, elasticity is provided depending on the thickness of the leaf spring.

Leaf springs are usually formed to have a uniform thickness, but they can also be formed to have a shape that is not uniform and tapers toward the open end. This makes it possible to obtain predetermined elastic properties.

By providing leaf springs according to the invention on both legs, the leaf spring effect is doubled at the same time.The leaf springs are preferably produced by wire erosion.

The invention will now be explained on the basis of schematically illustrated embodiments.

FIG. 1 shows a first embodiment of scissors according to the invention. A leaf spring (3), which is made in one piece with the leg (2), is provided in the area of the rotary connection (4). Both legs (2
) A screw (5) is attached to the rotary connection (4) for the connection. This screw (5) passes through the screw hole (6) of the leaf spring (3). The screw head (7) is adapted to rest on the leaf spring (3), since it may be possible to install the screw (5) from the opposite direction to the connection of the legs (2).

If the contact surface (8) is point-like, as in the known state of the art, the disadvantage is that the cutting force exerted on the leg (2) is not uniform due to the very small relief.

On the other hand, hold the leaf spring (3) with the rotating connection part (4).
(10) on the side of the rotating connection part, the contact surface (8) is enlarged, and as a result, flexible cutting performance is obtained, and at the same time, wear of the rotation connection part due to the leaf spring (3) is eliminated. I can do it.

In order to obtain a sufficient spring travel for the leaf spring (3), the inside of the leg (2) needs to be formed a little deeper with respect to the open end of the leaf spring (3).

FIG. 3 is an inside plan view of the legs (2) of the scissors (1). The width of the leaf spring (3) is equal to the width of the leg (2). If the width of the leaf spring (3) and the material of the legs (2) are fixed, the properties of the leaf spring (3) depend on the length and thickness of the leaf spring (3).

FIG. 4 shows a further embodiment in which the scissors (1) are provided with leaf springs (3) on both legs (2). This figure shows the scissors (1) just before they are connected.

Figure 5 shows the scissors (1) in the completed state.
In this case, the leaf springs <s)p Cat) are in a state of being pressed against each other.

In this case, the leaf springs (3) l (the eight open ends make approximately linear contact through the small contact surfaces (eight), so that the movement of the scissors during cutting is very smooth.

The play between the springs can be adjusted by adjusting the position of the screw (5).

FIG. 6 is an enlarged cross-sectional view of the leaf spring (3) (at the three open ends) along the straight line A-H of the scissors in FIG. 5. Size of the hollowed out part (11) of the leaf spring (3) must be large enough to provide sufficient spring travel.

According to this embodiment, in the closed state, the legs (2)
do not wobble into each other, which is therefore advantageous, especially when a high degree of cutting ability is required.

In another embodiment of the invention, the leaf spring (3) is wedge-shaped (FIGS. 7 and 8).

Figure 8 is a cross-sectional view taken along line C-D of the scissors in Figure 7, and it can be seen from this that the leaf spring (3) is wedge-shaped in the transverse direction with respect to the vertical axis of the leg (2). it is obvious.

This allows the spring pressure to increase as the scissors are closed, resulting in very good cutting properties. Furthermore, this has a positive effect on the relative thread stiffness of the leg (2).

[Brief explanation of drawings]

FIG. 1 is a side view of a pair of scissors with a leaf spring in the rotating connection. FIG. 2 is a side view of the scissors with a leaf spring on the side of the rotary joint between the rotary joint and the grip. FIG. 3 is an inside plan view of the scissors of FIG. 2. FIG. 4 is a partial side view of the scissors of FIG. 2, but in this case equipped with interacting leaf springs outside the rotating connection. Figure 5 is a partial side view of the same scissors as Figure 4, but
In this case, both legs are connected by screws. FIG. 6 is an enlarged view of a cross section taken along line AB in FIG. 5. FIG. 7 is a plan view similar to FIG. 3, but in this case the temporary spring has a wedge-shaped cross section. FIG. 8 is an enlarged view of a cross section taken along the straight line CD in FIG. 7. (1)−−−−−−−・Scissors (2) −・−・・Leaf spring (4
) ・・−・−・・One-turn connection part (5) −=−・Screw Qo）−−−−・=・−Grip patent applicant Tonde Owerk Gesellschaft Mitt Peschlenktel Hafrang agent Mitsu Shin Kenbu (foreign name)

Claims (11)

[Claims] (1) Scissors equipped with leaf springs acting on the legs, characterized in that the leaf springs (3) are made integrally with the legs (2). (2) The open end of the leaf spring (3) is provided in the direction of the grip (10).
Scissors as described in section. (3) Scissors according to claim 1 or 2, characterized in that a leaf spring (3) is provided in the area of the rotary connection (4). (4) The leaf spring (3) connects the rotating connection part (4) and the grip (10)
The scissors according to claim 1 or 2, characterized in that the scissors are provided on the side of the rotating connection part between the scissors. (5) Scissors according to claim 3, characterized in that the leaf spring (3) is provided with an extension in the direction of the grip (10). (6) Scissors according to any one of claims 1 to 5, characterized in that the width of the leaf spring (3) is equal to the width of the leg (2). (7) The scissors according to any one of claims 1 to 6, wherein the leaf spring (3) has a uniform thickness. (8) Scissors according to any one of claims 1 to 6, characterized in that the leaf spring (3) becomes thinner toward the open end. (9) The leaf spring (3) is wedge-shaped transversely to the longitudinal axis of the leg, with the wedge shape tapering on the opposite side to the blade of the leg. Scissors according to any one of claims 1 to 6, characterized in that: (10) The first aspect of claim 1, characterized in that the opposite leg (2') is also provided with a leaf spring (3').
The scissors according to any one of Items 9 to 9. (11) Scissors according to any one of claims 1 to 10, characterized in that the leaf springs (3), (3') are formed by wire erosion.