JPS5927587B2 - handy knife - Google Patents

Description

[Detailed description of the invention] The present invention relates to a knife that is convenient to carry.

In the field of handy knives, instead of the conventional elongated knife case, one that has a rounded shape so that the entire case can be grasped with the palm of the hand has recently been provided.

This knife case is designed to have a rounded shape, mainly aiming for a design effect and operability.

This technique, that is, the technique disclosed in Japanese Utility Model Application Publication No. 55-124257, uses a torsion coil spring 1 as shown in FIG. When in use, by sliding the sliding body 4 in the direction of the tip of the blade 2, that is, in the direction of the arrow, the tip portion of the blade 2 is exposed from the case 3 as shown in the figure.

However, as is clear from FIG. 11, this device has a structure in which the blade body 2 and the sliding body 4 overlap, so when the sliding body 4 is slid by the distance B, the blade body 2 also moves in exactly the same way. The dimension B is exposed from the case 3.

That is, the sliding distance of the sliding body 4 and the exposed distance of the blade body 2 are completely equal.

Therefore, it is not easy to make fine adjustments such as exposing the blade body 2 slightly from the case 3.

The present invention was created in view of such circumstances, and its main purpose is to finely adjust the exposure distance of the blade.

That is, the main feature of the present invention is that one end of the lever is rotatably supported on the case, the blade is rotatably supported in the middle of the lever, and the opposite side of the lever is rotatably supported on the case. When operated, the blade is exposed from the case.

Therefore, the exposed distance of the blade is always smaller than the operating distance of the lever on the side opposite to the pivot.

Therefore, the exposure distance of the blade can be easily finely adjusted.

In addition to the above-mentioned purpose, the invention in which the hook portion is provided is to prevent the blade from being naturally exposed from the case or being housed within the case.

This is because a locking portion is provided which locks and fixes the rotating lever at an arbitrary rotational position by means of projections and depressions.

In addition to the above-mentioned purpose, the invention in which the stepped portion is provided has an object of preventing damage to the index when cutting paper or the like by applying the blade to the index.

This is because a stepped portion is provided over a predetermined length from the blade inlet/outlet of the case and flush with the side surface of the blade to be taken in and out.

In addition to the above-mentioned purpose, the invention of providing the notch is to make it convenient for cutting threads and strings.

This is because a cutout is provided by cutting a portion of the case up to the cutting edge of the blade that is taken in and out.

1 to 8 show a first embodiment of the invention, FIG. 9 shows a second embodiment of the invention, and FIG. 10 shows a second embodiment of the invention. This shows a third embodiment.

The present invention will be specifically explained below according to each example.

The case, the case 11 in this embodiment, has a rounded shape, that is, a fan shape, so that the whole can be grasped with the palm of the hand.

A thick wall portion 11 protrudes from the periphery of the case 110.
A is provided.

One end of the lever is rotatably supported on the case.

In the case of the first actual case, the lever 12 has one end pivotally supported by a shaft 13, and has an arm portion 12a extending in an arc shape in the left-right direction in the figure.

This arm portion 12a plays the role of a guide by coming into contact with the thick wall portion 11a when the lever rotates.

However, it is also possible to provide an arm portion like the lever 14 of the second embodiment shown in FIG. 9 or the lever 15 of the third embodiment shown in FIG.

The lever operating section is formed on the opposite side of the lever from the pivot point.

This lever operating section is operated with a finger or the like.

In each of the above-described embodiments, the lever operation part 16 protrudes beyond the outer edge of the arcuate part 11b of the case 110, making it easy to put your finger on it. Inner surface 1 of lever operating portion 16
6a is in sliding contact.

The blade body is rotatably supported by a lever located between one end of the lever and the lever operating section.

Further, the blade body is moved in and out of the case by operating the lever operating section.

In each of the embodiments described above, the blade 17 is a lever 12.14.
．． 15 is pivotally supported by a shaft 18 approximately in the center.

The latching portion latches and fixes the rotating lever at an arbitrary rotational position by means of projections and depressions.

In the case of the first embodiment, the latching portion 19 is the lever operating portion 16
It consists of a convex portion 20 provided on the inner surface 16a of the case 110, and three concave portions 21 arranged at a predetermined interval on the outer surface of the arcuate portion 11b of the case 110.

The details of the position where the convex portion 20 is provided are shown in FIGS. 4 and 5.

Of course, the positions of the convex part 20 and the concave part 21 are not limited to these, and instead of the convex part 20, a convex part 22 shown by a chain double-dashed line in FIG. It is also possible to provide one.

Typical examples in this case are shown in FIGS. 12 and 13.

That is, as shown in FIGS. 12 and 13, the protrusion 22 is provided at the tip of the arm 12a of the lever 12.
A recess 30 corresponding to 2 is provided in the thick wall portion 11a of the case 11.

Furthermore, the latching part 23 of the third embodiment shown in FIG. It is composed of a convex portion 25.

The stepped portion is provided over a predetermined length from the blade inlet/outlet of the case, and is in contact with the side surface of the blade that is taken in and out.

The stepped portion 26 in the above-described embodiment is provided over the entire lower side of the case 11 from the blade entrance/exit 11c of the case 11 as shown in the figure.

6 and 7 are a side view and a front view of the case 11 with the lid 11d, and as shown in FIGS. 6 and 7, the stepped portion 26 of this embodiment has a blade. Side 1 of body 17
It is completely flush with 7b.

However, as mentioned above, the purpose of this stepped portion 26 is to prevent damage to the index when cutting paper or the like by applying the blade 17 to the index, so as long as it serves this purpose, it is not perfect. Of course, it is possible not only to have a state where the surface is flat, but also to be in a substantially flat state.

The notch is provided by cutting out a part of the case up to the sharp cutting edge of the blade that is taken in and out.

The notch 27 in the above embodiment is formed by cutting a U-shaped portion of the lower side of the case 11 near the blade entrance/exit 11c from the stepped portion 26 to near the center of the case 11.

The cutout 27 exposes the sharp cutting edge 17a.

FIG. 7 shows a state in which the cutting edge 17a is exposed.

Incidentally, FIG. 7Y is a diagram in which the case lid 11d is cut along the Y-Y line.

Next, the effects of the present invention will be specifically explained.

That is, in the present invention, one ends of the levers 12, 14, 15 are rotatably supported by the shaft 13, and the levers 12, 14, 15 are located between the ends and the lever operating section 16.
Since the blade 1T is rotatably supported on the lever 15, the blade 1 can be moved by operating the lever operation part 16 with your fingers.
7 is entered and exited from the blade opening 11c of the case 11 as appropriate.

At this time, the lever 12 is placed between the lever operating portion 16 and one end.
Since 14.15 is pivoted, as is clear from FIG. 1, the distance between the shaft 13 and the blade pivot point is larger than the distance L1 between the shaft 13, which is the lever pivot point, and the lever operation part 16. axis 1
8 is small (Ll>L2).

The ratio of Ll:L2 in the above embodiment is approximately 2:1.

As a result, in the present invention, the exposed distance of the blade 17 is smaller than the sliding operation distance of the lever operating section 16.

Therefore, compared to the conventional case shown in FIG. 11 in which these distances are completely equal, the exposure distance of the blade 17 can be easily finely adjusted.

Therefore, it is also possible to expose the blade body 17 to a large extent as shown in FIG. 3 or to a small extent as shown in FIG. 2.
This is easier than the conventional method shown in the figure.

In addition, in the case of an invention that is provided with a latching part, since the lever is fixed at an arbitrary rotational position by this latching part, the blade body will not be moved in and out naturally, and the blade body will be securely moved. It can be fixed to

In particular, in the first embodiment in which three recesses 21 are provided as the hooking portions 19 as shown in FIGS. 1 to 3, the degree of exposure of the blade body 17 is It is convenient because it can be adjusted in three stages.

Of course, it is also possible to provide three or more recesses as latching parts to achieve fine adjustment in three or more stages.

In the present invention, since the sliding operation distance of the member operation part 16 is larger than the exposed distance of the blade body 17, a large number of recesses as large latching parts are provided on the outer surface of the arcuate part 11b of the case 11. This makes it easy to make fine adjustments.

In addition, in the third embodiment shown in FIG. 10, since a continuous recessed portion 24 is provided as a hooking portion, fine adjustment can be made in more than ten steps or more.

It's convenient.

In addition, in the invention in which a stepped portion is provided, when the blade 17 is placed on an index finger or the like to cut paper, etc., as shown in FIG. 26, it is possible to cut paper or the like without damaging the index finger 28.

That is, if the stepped portion 26 is not provided, only the side surface of the blade 17 will come into contact with the index finger 28.

In this case, when the blade 17 only hits, as the blade moves, the blade edge 17a swings laterally in the direction of the index finger 28 or in the opposite direction due to the friction between the paper and the blade edge, the shake of the hand, etc. As a result, it is a common experience that the sharp cutting edge 17a cuts and damages the index finger 28 as well.

If the stepped portion 26 is provided flush with the side surface of the blade body 17, both the side surface of the blade body 17 and the stepped portion 26 are shown in FIG. 8 (schematic perspective view) as described above. By applying the blade to the index 28 in this manner, the horizontal vibration of the blade edge 17a described above can be reliably prevented.

Therefore, paper or the like can be cut without damaging the index finger 28 in any way.

A separate side view of the object 28 in this way is shown in the first figure.
It is shown in Figure 4.

Further, in the case of the invention in which a notch is provided to expose the cutting edge 17a of the blade body 17, threads, strings, etc. can be inserted into the cutting arrow part 27 to cut them.

Of course, as shown in FIG. 1, if the entire blade 17 is housed in the case 11 and a thread or string is inserted into the notch 2T, these can be cut.

Therefore, it is suitable as a sewing thread cutter or a fishing line cutter.

[Brief explanation of the drawing]

1 to 8 show a first embodiment of the present invention, and FIG. 1 is a front view of the blade after it has been housed, and FIG.
The figure is a front view with the blade slightly exposed, and FIG. 3 is a front view with the blade fully extended. FIG. 4 is a side view of the lever, and FIG. 5 is a front view thereof. Figure 6 is a side view with the case lid attached, Figure 7 is a side view of the case with the lid attached.
FIG. 7 is a front view of the same, FIG. 7 is a sectional view of the case lid taken along line Y-Y in FIG. 7, and FIG. FIG. 3 is a diagram corresponding to a second practical example of the present invention, and FIG. 10 is a diagram corresponding to FIG. 1, showing a third embodiment of the present invention. FIG. 11 is a front view for explaining the conventional device. FIGS. 12 and 13 are front views of levers of different embodiments and front views of the case before assembly. FIG. 14 is a side view of the device placed against a ruler. In the figure, 11 is a case, 12, 14.15 is a lever, 16
17 is the lever operation part, 17 is the blade body, 19.23 is the latch part, 2
Reference numeral 6 indicates a stepped portion, and reference numeral 27 indicates a blade body.

Claims (1)

[Scope of Claims] 1 (a) a case; (b) a lever whose one end is rotatably supported on the case; (c) a lever operating portion formed on the opposite side of the lever from the pivot; A handy knife comprising a blade rotatably supported on a lever located between the one end and a lever operating section, and which is moved in and out of the case as the lever operating section is operated. 2 (a) a case; (b) a lever whose one end is rotatably pivoted to the case;
(c) A lever operating portion formed on the opposite side of the lever; A handy knife comprising a blade that can be moved in and out of the case, and (e) a hanging part that locks and fixes a rotating lever at an arbitrary rotational position using unevenness. 3 (a) Case (b) a lever whose one end is rotatably supported on the case; (c) a lever operating section formed on the opposite side of the lever; and (d) between the one end and the lever operating section. (e) A blade that is rotatably supported by a lever located thereon and that is moved in and out of the case as the lever operating section is operated; A handy knife comprising a stepped part that is flush with the side surface of the knife. a lever operating portion formed on the pivot side; (b) a blade rotatably supported on the lever located between the one end and the lever operating portion, and which is moved in and out of the case as the lever operating portion is operated; (e) A notch portion provided by cutting out a part of the case up to the cutting edge portion of the blade body that is inserted and taken out.