JPS5920872Y2 - Cutter knife for left and right use - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to a ambidextrous cutter knife that is easy to use for both left-handed and right-handed people.

Prior Art Conventionally, a slider is slidably mounted within the guide frame of a holder, and a replaceable blade that can protrude from the tip side of the guide frame is removably attached to the slider. For cutter knives fitted with accessible tightening screws,
Usually, the tightening screw is operated with the thumb of the hand that grips the guide frame.

Therefore, when gripping with the right hand, the tightening screw must be located on the left side of the guide frame, and when gripping with the left hand, the tightening screw must be located on the right side of the guide frame.

However, in conventional cutter knives, the position of the tightening screw is determined from the beginning, so it cannot be used depending on whether the knife is right-handed or left-handed, which is very inconvenient.

Also, it is easier to operate the tightening screw if it is always in an easy-to-see position on the inside when in use, but even if the tightening screw is inside when used with the right hand, if the tightening screw is used with the left hand as it is, The tension screws were located on the outside, making them difficult to use.

Purpose The purpose of this device is to provide a pair of locking protrusions on both sides of the tip and base end of the slider surface, or on the tip side of the slider, so that one of the surface engaging protrusions can engage with the replaceable blade. To provide an ambidextrous cutter knife that can be used for either right-handed or left-handed use, in which the same function can be maintained regardless of whether the tightening screw is placed on the left or right side of the guide frame by reversing the slider. be.

EXAMPLE A first example embodying this invention will be described below with reference to FIGS. 1 to 5.

FIGS. 1 and 2 show a cutter knife assembled for a right-handed person. Taking this right-handed cutter knife as an example, the overall structure thereof will be described next.

Now, with this right-handed cutter knife, the holder is 1.
Both the distal and proximal ends of the guide frame 2 are open, and a bent part 2a is provided on both upper and lower edges of one side of the guide frame 2, so that there is no space between the bent part 2a and the bent part 2a. A guide groove 5 is formed that connects the open portions 3 and 4 on both sides of the distal and proximal ends.

Further, the bottom of the guide frame 2 is curved inward to have a mountain-shaped cross section, and a pair of slopes 6a and 6b on the inner surface are formed symmetrically.

Inside this guide frame 2, there is a slider 7 or a guide groove 5.
It is slidably attached along the

As shown in FIG. 5, this slider 7 has a sliding portion 9 at the center of the surface of the blade holder 8, and both edges 9a of the tip and base of the sliding portion 9 are tapered to each other. .

Engagement protrusions 10 a and 10 b are provided on the surface of the blade holder 8 at both the tip and base ends of the sliding portion 9, respectively.
is provided.

A plate-shaped spring 11 is accommodated in the sliding portion 9, and the spring 11 projects outward from the lower end surface 9b of the sliding portion 9.

When the slider 7 is installed in the guide frame 2 through the openings 3 and 4, the upper and lower end surfaces 9b of the sliding part 9 face the upper and lower inner edges 5a and 5b of the guide groove 5 of the guide frame 2, and the spring 1
1 is pressed against the lower inner edge 5b.

On the other hand, the upper and lower sides of the surface of the blade holder 8 are guided by the inner surface of the bent portion 2a extending on both sides along the guide groove 5 of the slider 7, so that the slider 7 cannot be pulled out to the outside of the guide groove 5. I never take it out.

In addition, at the center of the sliding portion 9 of the slider 7, an upper end surface 9 is provided.
A female thread 12 is provided near b, passing through the slider 7 in the front and back directions.

A tightening screw 13 having a knob 13a on the outside is screwed into the female screw 12, and the inner end of the tightening screw 13 can come into contact with the upper slope 6a of the inner bottom of the guide frame 2.

A replaceable blade 14 is fitted into the guide frame 2 so as to be able to protrude from the open end 3 thereof.

A fold line 14a is obliquely formed on one side of the replaceable blade 14, and an inner end 14b thereof is also obliquely parallel to the fold line 14a.

Then, the inner end 14b of the switching switch 14 rests on the front end surface of the blade holder 8 of the slider 7, and the slanted end side edge 9 of the sliding part 9
In the state corresponding to a, the engagement hole 15 formed in the inner end 14b is engaged with the distal engagement protrusion 10a of the slider 7, and as the slider 7 moves, the replaceable blade 14 also moves. ing.

Further, since the slider 7 is urged upward by the spring 11, the replaceable blade 14 is also urged upward at the same time.

Since almost the entire back portion 17 is pressed against the upper inner surface of the guide frame 2, the blade portion 16 is maintained slightly spaced from the lower inner surface of the guide frame 2.

Now, in the right-handed cutter knife configured as described above, in order to fix the replaceable blade 14 in a position in which it protrudes to some extent from the distal end side of the guide frame 2, the tightening screw 13 is inserted into the slope of the inner bottom of the guide frame 2. Just tighten it to 6a.

Due to this tightening, a moving force is applied to the slider 7 toward the earthen wall of the guide frame 2.

Therefore, due to this upward movement force and the upward biasing force of the spring 11 mentioned above, the blade part 16 of the replaceable blade 14 is separated from the lower inner surface of the guide frame 2, the back part 17 is pressed against the upper inner surface of the guide frame 2, and The blade part 16 of the replaceable blade 14 is not damaged when the blade 14 is taken in and out.

In this right-handed cutter knife, as shown in FIG.
The guide frame 2 is held and used with the right hand so that the guide groove 5 is located on the left side and the knob 13a of the tightening screw 13 can be operated with the thumb of the right hand.

When using this cutter knife as a left-handed knife, as shown in FIGS. 3 and 4, the guide frame 2 is rotated 180 degrees upward to position the guide groove 5 on the right side.

The slider 7 is arranged so that the engagement protrusion 10a on the distal end side of the slider 7 that engages with the engagement hole 15 of the replaceable blade 14 is located on the base end side of the guide frame 2 when used as a right-handed cutter knife. Take it out and turn it over.

Furthermore, with the blade portion 16 of the replaceable blade 14 facing downward, its retaining hole 15 is engaged with the distal end side engagement protrusion 10b of the slider 7, and then both are inserted into the guide frame 2.

This makes it a left-handed cutter knife, which is used by gripping the guide frame 2 with the left hand so that the knob 13a of the tightening screw 13 can be operated with the thumb of the left hand.

In this left-handed cutter knife, as in the above-mentioned right-handed cutter knife, the replaceable blade 14 is
The blade portion 16 is separated from the inner surface of the guide frame 2 to prevent damage to the replaceable blade 14.

Another Embodiment A slider 7A shown in FIG. 6 is the same as the slider 7 shown in the first embodiment, but has female threads 12 provided at the distal end and base end of the sliding portion 9, and the slider 7A shown in FIG. The knob 13a is located on the blade mounting side of the slider 7A regardless of whether it is used for a left-handed or a left-handed user.

Next, the embodiment shown in FIGS. 7 and 8 will be described.

The slider 7B shown in FIG. 7 has a female thread 12 provided near the lower end surface 9b of the sliding portion 9 (on the protruding side of the spring 11), contrary to the case of the first embodiment. It is used for the guide frame 2 shown.

That is, the same guide frame 2 is opposite to the case of the first embodiment,
The bottom part is bent outward to form a pair of slopes 6a and 6b on the inside, and in the right-handed cutter knife shown in FIG. The inner ends of the tightening screws 13 abut against each other.

Therefore, by tightening the tightening screw 13 against the slope 6b, a force of movement toward the earth wall of the guide frame 2 acts on the slider 7B.

Although not shown, in the case of a left-handed cutter knife, the tightening screw 13 of the slider 7B comes into contact with the other slope 6a of the guide frame 2, and has the same effect as in the case of the right-handed cutter knife described above. Eggplant.

Note that this cutter knife can also be changed to a right-handed or left-handed knife in the same way as in the first embodiment.

The slider 7C shown in FIG. 9 is the same as the slider 7B shown in FIG. 7 except that female threads 12 are provided at the distal and proximal ends of the sliding portion 9, and the slider 7C shown in FIG. It is the same as in the case of 7A.

The slider 7D shown in FIGS. 10 and 11 is integrally formed of plastic, and instead of the spring 11 of the slider 7 shown in FIG. A shaped piece spring 11 is integrally formed.

The sliders 7.7A, 7B, 7C, 7D mentioned above
All of these are equipped with a spring 11, and slopes 6a and 6b are formed on the inner bottom of the guide frame 2, on which a tightening screw 13 can come into contact, but as shown in FIGS. 12 and 13, In this invention, basically these springs 11 and slope 6a
, 6b are not necessarily required.

That is, in this cutter knife, the inner bottom of the guide frame 2 is flat and no slope is formed, and the tightening screw 13 screwed into the female thread 12 of the sliding part 9 is in contact with the inner bottom. The slider 7E is simply positioned in contact with the slider 7E.

Note that this cutter knife can also be changed to a right-handed or left-handed knife in the same way as in the first embodiment.

Slider 7.7 A, 7 B, 7 C, 7 explained above
In D and 7E, the engaging protrusions 10a and 10b are provided on both sides of the tip and base end of the surface of the blade holder 8, respectively.
As shown in FIG. 4 and FIG. 15, ground pin protrusions 10 a and 10 b may be provided on the front and back surfaces of the tip of the blade holder 8 of the slider 7F, respectively.

In this slider 7F, a sliding part 9 similar to the sliding part 9 in the central part of the front surface is provided at the center of the back surface of the blade holder 8, and a female thread 1 is provided on the tip side of the sliding part 9, penetrating both the front and back surfaces.
2 is provided.

As shown in FIGS. 16 and 17, this slider 7F
When using a cutter knife with a right-handed knife, as in the case of the right-handed cutter knife shown in FIG. 1 as the first embodiment, when the replaceable blade 14 is facing downward, The knob 13a of the slider 7F is located on the left side of the guide frame 2 so that it can be operated with the thumb of the right hand, and the engagement protrusion 10a of the slider 7F and the engagement hole 15 of the replaceable blade 14
engage with.

In this case, the tightening screw 13 is screwed into the female thread 12, and the effect of tightening the tightening screw 13 on the slope 6a is the same as in the first embodiment.

Further, as shown in FIGS. 18 and 19, when used as a left-handed knife, the guide groove 5 of the guide frame 2 is similar to the left-handed cutter knife shown in FIG. 3 as the first embodiment. With the slider 7F positioned on the right side, turn the slider 7F over.

Then, when assembled as a right-handed cutter knife, the engaging protrusion 10b on the back side of the slider 7F is positioned on the front side.

Furthermore, with the blade portion 16 of the replaceable blade 14 facing downward, its engagement hole 15 is engaged with the engagement protrusion 10b.

This results in a left-handed cutter knife located on the right side of the guide frame 2 so that the knob 13a of the tightening bolt 13 can be operated with the thumb of the left hand.

In this case, the tightening screw 13 screwed into the female thread 12 is tightened against the other slope 6b.

Effects As detailed above, this invention has sliders 7.7A-E.
A pair of engagement protrusions 10a are provided on both the front and back sides of the front end and the base end of the surface or on both the front and back sides of the front end side of the slider 7F.

10b, and the slider 7. is arranged such that one of the engaging protrusions 10a, 10b can engage with the replaceable blade 14.
By reversing 7A to 7F, the same function can be maintained and performed even if the tightening screw 13 is placed on either the left or right side of the guide frame 2, and there is an effect that it can be used for right-handed or left-handed users.

[Brief explanation of drawings]

FIG. 1 is a front view of a right-handed cutter knife according to the first embodiment, FIG. 2 is a right side view of the same cutter knife, and FIG.
The drawings are a front view of a left-handed cutter knife according to the first embodiment, FIG. 4 is a left side view of the cutter knife, FIG. 5 is a perspective view showing the slider of the cutter knife according to the first embodiment, and FIG. Figure 6 is a front view showing another embodiment of the slider;
Fig. 7 is also a front view showing another embodiment of the slider, Fig. 8 is a right side view of a right-handed cutter knife using the slider shown in Fig. 7, and Fig. 9 is a cutter shown in Fig. 8. FIG. 1 is a front view showing another embodiment of the slider used in the knife;
0 is a perspective view showing another embodiment of the slider, FIG. 11 is a sectional view taken along the line X-X of FIG. 10, FIG. 12 is a front view showing another embodiment of the slider, and FIG. Right side view of the right-handed cutter knife using the slider shown in the figure, No. 1
4 is a front view showing another embodiment of the slider, FIG. 15 is a plan view of FIG. 14, and FIG. 16 is a right-handed cutter knife using the slider shown in FIGS. 14 and 15. The front view, Fig. 17 is the right side view of the same cutter knife, Fig. 18
The figure is a front view of a left-handed cutter knife using the slider shown in FIGS. 14 and 15, and FIG. 19 is a left side view of the same cutter knife.

Claims (1)

[Claims for Utility Model Registration] 1. Sliders 7.7A to 7.7F are slidably mounted within the guide frame 2 of the holder 1, and the sliders 7.7A to 7.7A are capable of coming into contact with the bottom of the guide frame 2. A pair of engaging protrusions 10 are provided on both the front and back sides of the distal end and proximal end surfaces of the slider 7.7A-E surfaces or the distal end side of the slider 7F.
a, 10b are provided, and surface engaging protrusions 10a, 10 are provided.
The sliders 7° 7A-F in the guide frame 2 can be reversed so that one of the sliders 7A-F in the guide frame 2 can be engaged with the proximal engagement hole 15 of the replaceable blade 14 that can protrude from the distal end side of the guide frame 2. A cutter knife for both left and right hands. 2 The sliders 7.7 A-D and 7 F are provided with a spring 11 that presses and biases the blade portion 16 of the replaceable blade 14 away from the inner surface of the guide frame 2. A cutter knife for both left and right hands as described in section. 3 At the bottom of the guide frame 2, tightening of the tightening screw 13 is carried out by moving the sliders 7.7A-D, 7F upward together with the replaceable blade 14, thereby moving the blade part 16 of the replaceable blade 14 to the guide frame 2. The left-right and left-handed cutter knife according to claim 1 or 2, which has slopes 6a and 6b formed to separate it from the inner surface of the utility model.