JPH0214366Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to the improvement of pruning shears used for field work, hedge trimming, etc.

(Prior art) General-purpose pruning shears that are used hand-held for field work, hedge trimming, etc. have relatively long straight handles attached to each of a pair of blades that make up the shears body. is slightly bent upward at its base.

Appropriate anti-slip means are applied to the grip at the end of the handle, but this is mainly to prevent slipping in the longitudinal direction of the handle, and is done by varying the unevenness and thickness. , the cross-sectional shape is generally circular everywhere.

(Problem to be solved by the invention) By the way, when actually mowing with pruning shears, the grips are held in both hands, and the cutting action cannot be performed smoothly by simply opening and closing the handles; It requires a handle operation that involves rubbing the edges of the blades together.

Therefore, when the handle is straight as described above and the cross-sectional shape of the grip is circular, when the handle is closed, the hand that grasps the handle consciously turns the handle inward. The operation is performed by applying twisting force.

In this way, with conventional pruning shears, it is important to know how to operate the handle in order to perform the pruning job properly.
It is difficult to operate, reduces work efficiency, and
The degree of fatigue of the workers is also high.

This invention has been made in view of the above points, and the object is to provide a pair of pruning shears whose blade edges can be appropriately rubbed together naturally simply by opening and closing the handle.

(Means for Solving the Problems) In order to achieve the above object, the pruning shears of this invention have an upper surface part corresponding to the base of the thumb at the grip part of the handle, and a diagonally upward part on the outside when viewed from the center of the handle. It has a protrusion facing towards it.

(Function) According to this device configured as described above, when the grip portion of the handle is grasped, the base of the thumb (thenar part) is placed against the protrusion, and when the handle is closed, the protrusion is pressed against the protrusion. The scissors are pushed more strongly in the closing direction than anywhere else, and the force acts as a force that twists the handle inward, causing the cutting edges of both scissors to rub against each other to ensure the cutting (cutting) work.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

FIG. 1 is a perspective view of this invention, and FIG. 2 is a cutaway end view taken along the line of FIG. 1.

In the figure, 1 is the scissors body, a pair of scissors pieces 1a,
1b connected by a pivot 2. 3 is each scissor piece 1a,
The handles are attached to the legs of 1b, and are made of a straight aluminum tube or the like, and form a grip part 4 at the base.

In this invention, a protrusion 5 is provided on the upper surface of the grip part 4 corresponding to the base of the thumb, facing outward and diagonally upward when viewed from the handle center o. Base of thumb 4 when held in hand
is pressed inward.

The outer surface extending from the grip part 4 to the protrusion 5 is preferably a continuous curved surface that is directed obliquely upward from the lower surface of the grip part 4, as shown in FIG.

Further, in the above embodiment, an example was shown in which the protrusion 5 was provided on the grip member fitted to the handle 3, but it may be formed directly on the end of the handle.

In the above configuration, during mowing work, if the grip part 4 is gripped normally and the left and right handles 2 are moved inwardly toward each other in this state, the closing operation is performed.
As shown by the arrow in Fig. 2, the base of the thumb will push the outer surface A of the protrusion 5 more strongly than anywhere else on the outside of the vertical line a passing through the center o of the handle 2, and the force will be This acts as a force that twists the handle 3 inward, and this is transmitted to the scissor pieces 1a and 1b, causing the blade edges to rub together.

FIGS. 3a and 3b are cutaway end views corresponding to the line shown in FIG. 1, showing another embodiment of this invention.

The shape of the protrusion 5 in this invention is not particularly limited. Therefore, in this embodiment, the cross-sectional shape of the grip part 4 at the protrusion is elliptical or oval, and the surface pointy part is tilted outward from the vertical line a passing through the handle center o with the surface pointy part upward. is the protrusion 5. Also in this case, when the handle 3 is closed, the outer surface A of the protrusion 5 is strongly pressed by the base of the thumb as shown by the arrow in the figure, producing a force that twists the handle 3. The cross-sectional shape of the grip portion 4 is as follows:
The entire portion may have the cross-sectional shape of the protrusion 5.

(Effects) As mentioned above, with this invention, just by grasping the grip part of the handle normally and opening and closing the handle, the blade tips of both scissors pieces will naturally rub against each other appropriately, so it will not work as before. There is no need to consciously twist the handle inward, making it easier to work, improving work efficiency, eliminating fatigue even during long periods of mowing work, and having a simple structure that reduces manufacturing costs. It can also be provided at low cost.

[Brief explanation of drawings]

Fig. 1 is a perspective view of this device, Fig. 2 is a cutaway end view taken along the line of Fig. 1, and Fig. 3 a and b are a perspective view of the device.
FIG. 3 is a cut end view showing another embodiment corresponding to the line in FIG. 1... Scissors body, 2... Axis, 3... Handle, 4...
...Grip part, 5...Protrusion part.

Claims (1)

[Scope of utility model registration request] A pair of pruning shears characterized in that a protrusion is provided on the upper surface portion of the grip portion of the handle corresponding to the base of the thumb, extending outward and diagonally upward when viewed from the center of the handle.