CN117916063A - Art designing knife - Google Patents

Abstract

An art designing knife (100) comprises a main body (2), a sliding piece (3), a cap (4) and an elastic body (5). The slider (3) is configured to be movable within the main body (2) between a protruding position at which the blade (1) protrudes from the front end (21 a) and a storage position at which the blade (1) is stored between the front end (21 a) and the rear end (21 b). The cap (4) is fixed to the rear end (21 b) in a use state in which the slider (3) is disposed at the protruding position and in a non-use state in which the slider (3) is disposed at the storage position. The elastic body (5) forces the sliding member (3) toward the cap (4) in the use state and the non-use state. The slider (3) reaches the rear end (21 b) in the unused state.

Description

Art designing knife

Technical Field

The invention relates to an art designing knife.

Background

Heretofore, there has been an art designing knife called a safety knife. The safety cutter includes a main body, a slider, and an elastic body. The slider is connected to the blade inside the body. The blade is biased rearward by the elastic body. The safety cutter is configured to switch a use state in which the slider protrudes from the main body and a non-use state in which the slider houses the blade in the main body by movement of the blade. The slider in the unused state is disposed further rearward than the slider in the used state. The safety cutter can be switched from a use state to a non-use state by moving the slider backward under the action of the elastic body.

For example, a quick return slider (utility knife) described in japanese patent No. 3325524 (patent document 1) includes a holder (main body), a main slider, a clip mechanism, a sub slider, an elastic body, and a connecting mechanism. The main slider is movable in the front-rear direction with respect to the holder. The buckling mechanism is configured to buckle the main sliding body to the retainer. The sub-slider and the track body (blade) are disposed further forward than the main slider. The sub-slider is configured to be movable in the front-rear direction with respect to the main slider. The sub-slider is connected to the rail body. The elastic body is configured to urge the sub-slider toward the rear with respect to the main slider. The connecting mechanism connects the main sliding body and the auxiliary sliding body. Prior art literature

Patent literature

Patent document 1 Japanese patent No. 3325524

Disclosure of Invention

Technical problem to be solved by the invention

In the quick return slider described in the above publication, the main slider is disposed at a position forward of the rear end portion of the holder. Since the sub-slider is disposed further forward than the main slider, the sub-slider does not reach the rear end of the retainer. Therefore, in the unused state of the quick return slider, the prop may protrude from the front end portion of the retainer.

The present invention has been made in view of the above-described problems, and an object thereof is to provide an art designing knife in which a blade does not protrude from a distal end portion of a main body in a non-use state.

Technical proposal adopted for solving the technical problems

The utility knife of the invention comprises a main body, a sliding piece, a cover cap and an elastic body. The main body includes a front end and a rear end. The rear end portion is opposite to the front end portion. The slider is configured to retain the blade within the interior of the body. The slider is configured to be movable within the main body between a protruding position at which the blade protrudes from the front end portion and a storage position at which the blade is stored between the front end portion and the rear end portion. The cap can be secured to the rear end. The elastomer connects the slider to the cap. The cap is fixed to the rear end portion in a use state in which the slider is disposed at the protruding position and in a non-use state in which the slider is disposed at the storage position. The elastic body urges the slider toward the cap in the use state and the non-use state. The slider reaches the rear end portion in the unused state.

Effects of the invention

According to the utility knife of the present invention, the blade does not protrude from the front end portion of the main body in the non-use state.

Drawings

Fig. 1 is a plan view schematically showing a structure in which a stopper of an art designing knife according to embodiment 1 is disposed at a first position.

Fig. 2 is a side view schematically showing the structure of the utility knife according to embodiment 1.

Fig. 3 is a cross-sectional view taken along line III-III of fig. 1.

Fig. 4 is a cross-sectional view schematically showing a structure in which the blade of the utility knife according to embodiment 1 is projected from the main body.

Fig. 5 is a plan view schematically showing a structure in which the stopper of the utility knife according to embodiment 1 is disposed at the second position.

Fig. 6 is a plan view schematically showing a structure in which the stopper of the utility knife according to embodiment 1 is disposed at the third position.

Fig. 7 is a partial perspective view schematically showing a structure in which a lever of the utility knife according to embodiment 1 is arranged in a movable position.

Fig. 8 is a perspective view schematically showing the structure of a slider of the utility knife according to embodiment 1.

Fig. 9 is a side view schematically showing the structure of a slider of the utility knife according to embodiment 1.

Fig. 10 is a cross-sectional view taken along line X-X of fig. 9.

Fig. 11 is a perspective view schematically showing the structure of a cap of the utility knife according to embodiment 1.

Fig. 12 is a perspective view schematically showing the structure of the stopper of the utility knife according to embodiment 1, viewed from one side.

Fig. 13 is a perspective view schematically showing the structure of the stopper of the utility knife according to embodiment 1, viewed from the other side.

Fig. 14 is a perspective view schematically showing the structure of the lever and the hinge of the utility knife according to embodiment 1.

Fig. 15 is a partial cross-sectional view schematically showing a structure in which a stopper of the utility knife according to embodiment 1 is disposed at a first position.

Fig. 16 is a partial cross-sectional view schematically showing a structure in which the stopper of the utility knife according to embodiment 1 is disposed at the second position.

Fig. 17 is a partial cross-sectional view schematically showing a structure in which the stopper of the utility knife according to embodiment 1 is disposed at the third position.

Fig. 18 is a partial cross-sectional view schematically showing a structure in which a hinge and a cap of the utility knife according to embodiment 1 are fitted.

Fig. 19 is a partial cross-sectional view schematically showing a structure in which the fit between the hinge and the cap of the utility knife according to embodiment 1 is released.

Fig. 20 is a partial cross-sectional view schematically showing a structure in which a lever of the utility knife according to embodiment 1 is arranged in a movable position.

Fig. 21 is a partial cross-sectional view schematically showing the structure of the utility knife according to embodiment 2.

Detailed Description

Hereinafter, embodiments will be described with reference to the drawings. In the following, the same or corresponding parts are denoted by the same reference numerals, and repetitive description thereof will not be repeated.

Embodiment 1

The structure of the utility knife 100 according to embodiment 1 will be described with reference to fig. 1 to 14.

As shown in fig. 1, the utility knife 100 is configured to hold the blade 1. A cutting edge is provided at the front end of the blade 1. The blade 1 includes a plurality of blade edge portions 10. The plurality of blade parts 10 are connected to each other. The plurality of blade portions 10 are detachable from each other.

The utility knife 100 includes a main body 2, a slider 3, a cap 4, and an elastic body 5 (see fig. 3). Preferably, the utility knife 100 further includes a stopper 6, a lever 7, and a hinge 8 (see fig. 3). Fig. 1 is a plan view schematically showing the structure of the utility knife 100 in a state where the stopper 6 is disposed at the first position. The stopper 6 is movable to a first position, a second position, and a third position, as described later.

The main body 2 includes a holder 21 and a cover 22. The holder 21 is configured to house the blade 1. The holder 21 is made of metal, for example. The metal retainer 21 is a metal body. The cover 22 is configured to partially cover the retainer 21. As shown in fig. 1 and 2, the cover 22 covers a part of the front surface, the side surfaces, and the back surface of the holder 21. The surface of the holder 21 is partially exposed from the cover 22. The cover 22 may be provided with an anti-slip portion 23. The anti-slip portion 23 is provided with irregularities.

As shown in fig. 3, the main body 2 includes a front end portion 21a and a rear end portion 21b. Fig. 3 is a cross-sectional view taken along line III-III of fig. 1. The rear end portion 21b is opposite to the front end portion 21 a. The dimension of the body 2 in the longitudinal direction is larger than the dimension of the blade 1 in the longitudinal direction. That is, the dimension of the main body 2 from the front end portion 21a to the rear end portion 21b is larger than the dimension of the blade 1 in the longitudinal direction.

In the present embodiment, the direction from the rear end portion 21b to the front end portion 21a is the first direction DR1. The first direction DR1 is along the longitudinal direction of the main body 2. The side of the front end portion 21a opposite to the rear end portion 21b is forward of the first direction DR1. The rear end portion 21b is disposed rearward of the front end portion 21a in the first direction DR1. The stopper 6 is located on the side opposite to the side on which the blade 1 is located. The side of the blade 1 opposite to the stopper 6 is the other side.

The slider 3 is configured to hold the blade 1 inside the main body 2. The slider 3 is connected to the blade 1 between the front end portion 21a and the rear end portion 21 b. The connecting position of the slider 3 and the blade 1 is located between the front end portion 21a and the rear end portion 21 b. The slider 3 includes a first retaining protrusion 30 extending in a direction from one side to the other side. The elastic body 5 is connected to the first holding projection 30.

As shown in fig. 3 and 4, the slider 3 is configured to be movable in the first direction DR 1. Fig. 4 is a cross-sectional view showing the structure of the utility knife 100 in a use state. The slider 3 is configured to be movable inside the main body 2 between a protruding position (see fig. 4) at which the blade 1 protrudes from the front end portion 21a and a storage position (see fig. 3) at which the blade 1 is stored between the front end portion 21a and the rear end portion 21 b.

The slider 3 comprises a first extension portion extending along the body 2. The first extension portion is formed in a linear shape. The body 2 comprises a second extension along the slider 3. The second extension portion is formed in a linear shape. The first extension portion and the second extension portion are linearly formed, so that the slider 3 can continuously move inside the main body 2. Thus, the length of the slider 3 protruding from the main body 2 can be continuously adjusted. The length of the slider 3 protruding from the main body 2 can be adjusted more easily than in the case where the slider 3 and the main body 2 are fixed by, for example, concavity and convexity. Further, the length of the slider 3 protruding from the main body 2 can be adjusted so that the substantially entire length of the blade 1 protrudes from the main body 2.

As shown in fig. 3, the slider 3 reaches the rear end portion 21b in a non-use state in which the slider 3 is disposed at the storage position. The slider 3 overlaps the rear end portion 21b in the unused state. The slider 3 protrudes rearward of the main body 2 in the unused state. The slider 3 spans the body 2 and the cap 4 along the first direction DR1 in the non-use state.

The cap 4 can be fixed to the rear end portion 21b. The cap 4 can be fixed to the rear end portion 21b by being partially inserted into the inside of the main body 2 through the rear end portion 21b. The cap 4 has a portion facing the rear end portion 21b. The portion of the cap 4 facing the rear end portion 21b is configured to be in contact with the rear end portion 21b.

The cap 4 is fixed to the rear end portion 21b in a use state (see fig. 4) in which the slider 3 is disposed at the protruding position and in a non-use state (see fig. 3) in which the slider 3 is disposed at the housed position. The cap 4 is fixed to the rear end portion 21b in the use state (see fig. 4) and the non-use state (see fig. 3). The cap 4 does not move relative to the rear end portion 21b in the use state (see fig. 4) and the non-use state (see fig. 3). The cap 4 contacts the rear end portion 21b in a use state (see fig. 4) and a non-use state (see fig. 3).

The cap 4 includes a second retaining protrusion 40 extending in a direction from one side to the other side. The elastic body 5 is connected to the second holding projection 40. The cap 4 is formed to be separated from the body 2. As described later, the cap 4 is configured to be detachable with respect to the main body 2. The cap 4 is configured to be detachable from the main body 2 in a state of being integrated with the blade 1, the slider 3, and the elastic body 5.

The elastic body 5 connects the slider 3 to the cap 4. The elastic body 5 includes a front end 51 and a rear end 52. The front end 51 is disposed further forward than the rear end 52. The front end 51 is connected to the first holding projection 30. The rear end portion 52 is connected to the second holding projection 40. The elastic body 5 connects the slider 3 to the cap 4 by connecting the first holding projection 30 to the second holding projection 40.

The elastic body 5 biases the slider 3 toward the cap 4 in the use state (see fig. 4) and the non-use state (see fig. 3). The elastic body 5 biases the slider 3 rearward. The elastic body 5 biases the cap 4 forward. Thereby, the elastic body 5 presses the cap 4 against the main body 2.

The elastic body 5 is configured to be stretchable and contractible along the first direction DR 1. The elastic body 5 is, for example, a spring. The elastic body 5 is, for example, a pulling spring. The elastic body 5 is not limited to a spring, and may be appropriately determined.

The stopper 6 is mounted to the slider 3 so as to be movable with respect to the slider 3. The stopper 6 is movable relative to the slider 3 along the first direction DR 1. As shown in fig. 1 and 5, the stopper 6 is configured to be movable between a first position and a second position. Fig. 5 is a plan view showing the structure of the utility knife 100 in a state where the stopper 6 of the utility knife 100 is disposed at the second position. As shown in fig. 6, the stopper 6 is preferably configured to be movable to the third position. Fig. 6 is a plan view showing the structure of the utility knife 100 in a state where the stopper 6 of the utility knife 100 is disposed at the third position. The stopper 6 is configured to be movable between a first position, a second position, and a third position. That is, the slider 3 is configured to be movable in three stages. The first position, the second position, and the third position are disposed in this order from the front. The first position is disposed further forward than the second position. The second position is disposed further forward than the third position.

When the stopper 6 is disposed at the first position, the slider 3 is not fixed to the cap 4. That is, when the stopper 6 is disposed at the first position, the slider 3 can move relative to the cap 4. When the stopper 6 is disposed at the first position, the slider 3 can be disposed at the protruding position as shown in fig. 4.

When the stopper 6 is disposed at the second position, the slider 3 is fixed to the cap 4. When the stopper 6 is disposed at the second position, the slider 3 is fixed at the storage position.

When the stopper 6 is disposed at the third position, the slider 3 is fixed to the cap 4. As shown in fig. 7, the slider 3 is configured to be movable to a position rearward of the rear end portion 21b when the stopper 6 is disposed at the third position (see fig. 6). The slider 3 is configured to be extracted from the body 2 together with the cap 4 and the stopper 6.

As shown in fig. 3 and 7, the lever 7 is rotatably mounted to the main body 2 with respect to the main body 2. The lever 7 is configured to be rotatable between a fixed position and a movable position.

As shown in fig. 3, when the lever 7 is disposed at the fixed position, the cap 4 is fixed to the body 2. With the lever 7 disposed at the fixed position, the cap 4 is clamped with the body 2 by the lever 7 to fix the cap 4 to the body 2. When the lever 7 is arranged at the fixed position, the lever 7 is arranged linearly with respect to the main body 2. When the lever 7 is disposed at the fixed position, the lever 7 can be rotated so that the rotation direction of the lever 7 is orthogonal to the first direction DR 1. In the case where the lever 7 is arranged at the fixed position, the lever 7 does not move parallel to the first direction DR 1. In fig. 3, the direction of rotation of the lever 7 is indicated by a blank arrow.

As shown in fig. 7, when the lever 7 is disposed at the movable position, the cap 4 is not fixed to the main body 2. When the lever 7 is disposed at the movable position, the lever 4 can move relative to the main body 2. When the lever 7 is disposed at the movable position, the lever 7 does not clamp the cap 4 to the body 2. When the lever 7 is disposed at the movable position, the lever 7 is disposed on the other side of the cap 4. When the lever 7 is disposed at the movable position, the lever 7 is configured so as not to hinder the cap 4 from being detached from the main body 2.

As shown in fig. 3, a hinge 8 is mounted to the lever 7. In the present embodiment, the hinge 8 is integrally formed with the lever 7. As will be described later, the hinge 8 is formed separately from the lever 7. The hinge 8 is deformable. The hinge 8 is deformed so as to be contractible along the first direction DR 1. The hinge 8 is deformable in such a manner that the first end 81 of the hinge 8 moves rearward.

The hinge 8 is configured to be capable of fitting with the cap 4 in a state where the lever 7 is disposed at a fixed position. The hinge 8 is configured to be fitted to the cap 4 when the stopper 6 is disposed at the first position or the second position. Specifically, the hinge 8 is configured to be fitted to the cap 4 by being disposed such that the first end 81 of the hinge 8 contacts the cap 4. The lever 7 is configured to be fixed at a fixed position by fitting the hinge 8 to the cap 4. That is, the lever 7 is configured not to rotate relative to the cap 4 by fitting the hinge 8 with the cap 4.

As shown in fig. 6, the stopper 6 is configured to be movable to a third position where the stopper 6 contacts the hinge 8 (see fig. 3). The lever 7 is configured to be rotatable from the fixed position to the movable position by the stopper 6 being moved from the first position or the second position to the third position. When the stopper 6 is disposed at the third position and contacts the hinge 8 (see fig. 3), the hinge 8 (see fig. 3) is deformed by the contact with the stopper 6, and the fit with the cap 4 is released. Specifically, the hinge 8 (see fig. 3) is configured to be deformed so that the first end 81 (see fig. 3) of the hinge 8 (see fig. 3) is pushed out of the cap 4, thereby releasing the engagement with the cap 4.

Detailed structure of slider 3

Next, the detailed structure of the slider 3 will be described with reference to fig. 8 to 10.

As shown in fig. 8 and 9, the slider 3 includes a first portion 31, a second portion 32, and a third portion 33. The first portion 31, the second portion 32, and the third portion 33 are connected in this order. The first portion 31 is provided with a first anti-slip portion 311. The first slip prevention portion 311 is provided with irregularities.

As shown in fig. 10, the second portion 32 is provided with a front first convex portion 32a1, a front second convex portion 32a2, a rear first convex portion 32b1, a rear second convex portion 32b2, a first straight portion 32c1, and a second straight portion 32c2. The front first convex portion 32a1 is opposed to the front second convex portion 32a 2. The rear first convex portion 32b1 is opposed to the rear second convex portion 32b 2. The first straight portion 32c1 is opposed to the second straight portion 32c2.

The front first convex portion 32a1 and the rear first convex portion 32b1 are connected by a first straight portion 32c 1. The front first convex portion 32a1 and the rear first convex portion 32b1 expand from the first straight portion 32c1 to the opposite side of the front second convex portion 32a2 and the rear second convex portion 32b 2. The front second convex portion 32a2 and the rear second convex portion 32b2 are connected by the second straight portion 32c 2. The front second convex portion 32a2 and the rear second convex portion 32b2 expand from the second straight portion 32c2 to the opposite side of the front first convex portion 32a1 and the rear first convex portion 32b 1.

The slider 3 includes a root portion 33a, a first protruding portion 33b1, a second protruding portion 33b2, a first engaging protruding portion 33c1, a second engaging protruding portion 33c2, an intermediate first protruding portion 33d1, and an intermediate second protruding portion 33d2. In the present embodiment, the root portion 33a, the first protruding portion 33b1, the second protruding portion 33b2, the first engaging protruding portion 33c1, the second engaging protruding portion 33c2, the intermediate first protruding portion 33d1, and the intermediate second protruding portion 33d2 are provided in the third portion 33. The first protruding portion 33b1 and the second protruding portion 33b2 protrude rearward from the root portion 33 a. The first protruding portion 33b1 and the second protruding portion 33b2 are disposed with a space left therebetween. The first engagement protrusion 33c1 is connected to the front end of the first protrusion 33b1. The first engagement protrusion 33c1 extends from the first protrusion 33b1 to the second protrusion 33b 2. The second engagement protrusion 33c2 is connected to the front end of the second protrusion 33b 2. The second engagement protrusion 33c2 extends from the second protrusion 33b2 to the first protrusion 33b1. The intermediate first convex portion 33d1 is connected to the first protruding portion 33b1. The intermediate first protruding portion 33d1 extends from the first protruding portion 33b1 to the opposite side of the second protruding portion 33b 2. The intermediate second convex portion 33d2 is connected to the second protruding portion 33b 2. The intermediate second convex portion 33d2 extends from the second convex portion 33b2 to the opposite side to the first convex portion 33b1.

Detailed structure of cap 4

Next, a detailed structure of the cap 4 will be described with reference to fig. 11.

As shown in fig. 11, the cap 4 includes a main body portion 41 and an insertion portion 44. The main body 41 is configured to face the main body 2 (see fig. 3). The insertion portion 44 is configured to be inserted into the main body 2 (see fig. 3). The insertion portion 44 is inserted into the body 2 (see fig. 3), thereby suppressing the relative movement of the cap 4 with respect to the body 2 (see fig. 3).

A groove 49 is provided in the cap 4. The groove 49 includes a first side wall portion 43b1, a second side wall portion 43b2, a first concave portion 43c1, and a second concave portion 43c2. In the present embodiment, the groove 49 includes the first groove portion 42 and the second groove portion 43. A second groove 43 is provided at the bottom of the first groove 42. That is, the groove 49 is formed in a double layer. The second groove portion 43 includes a bottom portion 43a, a first side wall portion 43b1, a second side wall portion 43b2, a third side wall portion 43b3, a first recess 43c1, and a second recess 43c2. The first side wall portion 43b1, the second side wall portion 43b2, the third side wall portion 43b3, the first concave portion 43c1, and the second concave portion 43c2 stand up from the bottom portion 43 a. The second side wall portion 43b2 is spaced apart from the first side wall portion 43b1 and faces the first side wall portion 43b1. The third side wall portion 43b3 connects the first side wall portion 43b1 to the second side wall portion 43b2. The first concave portion 43c1 is provided to be concave from the first side wall portion 43b1 to the opposite side to the second side wall portion 43b2. The second concave portion 43c2 is provided to be concave from the second side wall portion 43b2 to the opposite side of the first side wall portion 43b1.

Detailed structure of limiter 6

Next, a detailed configuration of the stopper 6 will be described with reference to fig. 12 and 13.

As shown in fig. 12 and 13, the stopper 6 includes a base 61, a one-side protruding portion 62, another-side protruding portion 63, a front first protruding portion 64a1, a front second protruding portion 64a2, a first fixing protruding portion 64b1, a second fixing protruding portion 64b2, and a rear protruding portion 65. The one-side protruding portion 62 protrudes to one side from the base 61. The other-side protruding portion 63 protrudes from the base 61 to the other side. The front first projection 64a1 and the front second projection 64a2 project forward from the base 61. The front first projection 64a1 and the front second projection 64a2 are disposed with a space left therebetween. The first fixing protrusion 64b1 extends from the front end of the front first protrusion 64a1 toward the front second protrusion 64a 2. The second fixing protrusion 64b2 extends from the front end of the front second protrusion 64a2 toward the front first protrusion 64a 1. The first fixing protrusion 64b1 and the second fixing protrusion 64b2 face each other with a space left therebetween. The rear projection 65 projects rearward from the base.

Detailed structure of lever 7

Next, a detailed structure of the lever 7 will be described with reference to fig. 2 and 14.

As shown in fig. 14, the lever 7 includes a body 71, a first arm 72a, and a second arm 72b. The body 71 connects the first arm 72a and the second arm 72b. A hinge 8 is connected to the body 71. The first arm portion 72a and the second arm portion 72b extend forward from the body portion 71. The first arm 72a is rotatably mounted to the main body. The second arm 72b is rotatably attached to the main body on the opposite side of the main body from the first arm 72 a. The first arm portion 72a is provided with a first through hole 73a. The second arm portion 72b is provided with a second through hole 73. The first through hole 73a and the second through hole 73b are disposed to intersect the first direction DR 1.

As shown in fig. 2, the first shaft portion 23a of the main body 2 is inserted into the first through hole 73 a. Although not shown, a second shaft portion of the main body 2 is inserted into the second through hole 73 b. Thus, the lever 7 can rotate relative to the main body 2 about the first shaft portion 23a and the second shaft portion of the main body 2.

Structure of art designing knife 100 with limiter 6 disposed at the first position

Next, the structure of the utility knife 100 in the case where the stopper 6 is disposed at the first position will be described in detail with reference to fig. 15. Fig. 15 is a partial cross-sectional view showing the structure of the utility knife 100 in a state where the stopper 6 of the utility knife 100 is disposed at the first position. For convenience of explanation, fig. 15 illustrates the first portion 31 (see fig. 8) of the slider 3 and the base portion 61 (see fig. 12) of the stopper 6.

The slider 3 is configured to protrude the blade from the main body 2 when the stopper 6 is disposed at the first position. Therefore, when the stopper 6 is disposed at the first position, the utility knife 100 is in the use state. The slider 3 is configured to be detachable from the cap 4 when the stopper 6 is disposed at the first position. The stopper 6 is configured not to engage with the slider 3 when the stopper 6 is disposed at the first position.

As shown in fig. 15, the front first projection 64a1 and the front second projection 64a2 of the stopper 6 are configured not to engage with the front first projection 32a1 and the front second projection 32a2 when the stopper 6 is arranged at the first position. Specifically, the front first protruding portion 64a1 and the front second protruding portion 64a2 are configured to be disposed further forward than the front first protruding portion 32a1 and the front second protruding portion 32a2 when the stopper 6 is disposed at the first position.

The first protruding portion 33b1 protrudes from the root portion 33a toward the groove 49 along the first side wall portion 43b 1. The second protruding portion 33b2 protrudes from the root portion 33a toward the groove 49 along the second side wall portion 43b 2. The intermediate first convex portion 33d1 engages with the first concave portion 43c 1. The intermediate second convex portion 33d2 engages with the second concave portion 43c 2. The other-side protruding portion 63 protrudes from the base 61 (see fig. 13) between the first protruding portion 33b1 and the second protruding portion 33b 2.

When the stopper 6 is disposed at the first position, the other side protruding portion 63 is disposed at the root portion 33a side of the intermediate first protruding portion 33d1 and the intermediate second protruding portion 33d2, so that the engagement between the intermediate first protruding portion 33d1 and the first concave portion 43c1 and the engagement between the intermediate second protruding portion 33d2 and the second concave portion 43c2 can be released. The slider 3 is configured to be deformable so that the intermediate first convex portion 33d1 is separated from the first concave portion 43c1 when the stopper 6 is disposed at the first position. The slider 3 is configured to be deformable so as to disengage the intermediate second convex portion 33d2 from the second concave portion 43c2 when the stopper 6 is disposed at the first position. Specifically, the first protruding portion 33b1 and the second protruding portion 33b2 are configured to be deformable so as to approach each other at the positions of the intermediate first protruding portion 33d1 and the intermediate second protruding portion 33d2 when the stopper 6 is arranged at the first position. The other-side protruding portion 63 is configured to be disposed further forward than the intermediate first protruding portion 33d1 and the intermediate second protruding portion 33d2 when the stopper 6 is disposed at the first position.

Structure of art designing knife 100 with limiter 6 disposed at the second position

Next, the structure of the utility knife 100 in the case where the stopper 6 is disposed at the second position will be described in detail with reference to fig. 16. Fig. 16 is a partial cross-sectional view showing the structure of the utility knife 100 in a state where the stopper 6 of the utility knife 100 is disposed at the second position. For convenience of explanation, fig. 16 illustrates the first portion 31 (see fig. 8) of the slider 3 and the base portion 61 (see fig. 12) of the stopper 6.

The main body 2 is configured to house the entire blade when the stopper 6 is disposed at the second position. Therefore, when the stopper 6 is disposed at the second position, the utility knife 100 is not in use. The slider 3 is configured not to be separated from the cap 4 when the stopper 6 is disposed at the second position. The stopper 6 is configured to engage with the slider 3 when the stopper 6 is disposed at the second position.

As shown in fig. 16, the front first protruding portion 64a1 of the stopper 6 is configured to engage with the front first protruding portion 32a1 and the rear first protruding portion 32b1 when the stopper 6 is arranged at the second position. Specifically, the front first protruding portion 64a1 is configured to be sandwiched between the front first protruding portion 32a1 and the rear first protruding portion 32b1 in the first direction DR1 when the stopper 6 is arranged at the second position. The front second protruding portion 64a2 of the stopper 6 is configured to engage with the front second protruding portion 32a2 and the rear second protruding portion 32b2 when the stopper 6 is arranged at the second position. Specifically, the front second protruding portion 64a2 is configured to be sandwiched between the front second protruding portion 32a2 and the rear second protruding portion 32b2 in the first direction DR1 when the stopper 6 is arranged at the second position.

When the stopper 6 is disposed at the second position, the other side protruding portion 63 is sandwiched between the intermediate first protruding portion 33d1 and the intermediate second protruding portion 33d2, so that the engagement between the intermediate first protruding portion 33d1 and the first concave portion 43c1 and the engagement between the intermediate second protruding portion 33d2 and the second concave portion 43c2 are maintained. The intermediate first convex portion 33d1 of the slider 3 is configured not to be separated from the first concave portion 43c1 when the stopper 6 is arranged at the second position. The intermediate second convex portion 33d2 of the slider 3 is configured not to be separated from the second concave portion 43c2 when the stopper 6 is arranged at the second position. Specifically, the stopper 6 is configured such that the other side protruding portion 63 is disposed between the intermediate first protruding portion 33d1 and the intermediate second protruding portion 33d2 when the stopper 6 is disposed at the second position. Thus, the first protruding portion 33b1 and the second protruding portion 33b2 of the slider 3 are configured so as not to be deformed so as to approach each other at the positions of the intermediate first protruding portion 33d1 and the intermediate second protruding portion 33d2 when the stopper 6 is arranged at the second position.

Structure of art designing knife 100 with limiter 6 disposed at the third position

Next, the structure of the utility knife 100 in the state where the stopper 6 is disposed at the third position will be described in detail with reference to fig. 17 to 20. Fig. 17 is a partial cross-sectional view showing the structure of the utility knife 100 in a state where the stopper 6 of the utility knife 100 is disposed at the third position. For convenience of explanation, fig. 17 does not show the first portion 31 (see fig. 8) of the slider 3 and the base portion 61 (see fig. 12) of the stopper 6. Fig. 18 is an enlarged view of the XVIII area in fig. 3. Fig. 19 shows a structure of the utility knife 100 in a state where the fitting of the hinge 8 and the cap 4 is released. Fig. 19 is a cross-sectional view corresponding to fig. 18. In fig. 19, the lever 7 is arranged at a fixed position. Fig. 20 shows the structure of the utility knife 100 in a state where the lever 7 is disposed at the movable position. Fig. 20 is a cross-sectional view corresponding to fig. 18. For convenience of explanation, the elastic body 5 (see fig. 3) is not illustrated in fig. 18 to 20.

As shown in fig. 17, the front first projection 64a1 and the front second projection 64a2 of the stopper 6 are configured not to engage with the slider 3 when the stopper 6 is disposed at the third position. Specifically, the front first protruding portion 64a1 is configured to be disposed at a position further rearward than the rear first protruding portion 32b1 in the first direction DR1 when the stopper 6 is disposed at the third position. The front second protruding portion 64a2 is configured to be disposed at a position further rearward than the rear second protruding portion 32b2 in the first direction DR1 when the stopper 6 is disposed at the third position.

When the stopper 6 is disposed at the third position, the other side protruding portion 63 is disposed on the opposite side of the root portion 33a from the intermediate first protruding portion 33d1 and the intermediate second protruding portion 33d2, so that the engagement between the intermediate first protruding portion 33d1 and the first concave portion 43c1 and the engagement between the intermediate second protruding portion 33d2 and the second concave portion 43c2 are maintained. The slider 3 is configured not to be separated from the cap 4 when the stopper 6 is disposed at the third position. Specifically, the intermediate first convex portion 33d1 of the slider 3 is configured not to deform so as to be separated from the first concave portion 43c1 when the stopper 6 is arranged at the third position. The intermediate second convex portion 33d2 is configured not to be deformed so as to be separated from the second concave portion 43c2 when the stopper 6 is disposed at the third position. More specifically, the first protruding portion 33b1 and the second protruding portion 33b2 are configured not to deform so as to approach each other at the positions of the intermediate first protruding portion 33d1 and the intermediate second protruding portion 33d2 when the stopper 6 is arranged at the third position. The other-side protruding portion 63 is configured to be disposed at a position rearward of the intermediate first protruding portion 33d1 and the intermediate second protruding portion 33d2 when the stopper 6 is disposed at the third position.

Action of art designing knife 100

Next, the operation of the utility knife 100 will be described with reference to fig. 3 to 7 and fig. 15 to 18. Fig. 18 is a partial cross-sectional view showing a state in which the stopper 6 is disposed at the second position. In fig. 18, the hinge 8 is fitted with the cap 4. Fig. 19 is a partial cross-sectional view showing a state in which the stopper 6 is disposed at the third position. In fig. 19, the fitting of the hinge 8 to the cap 4 is released. In fig. 18 and 19, the lever 7 is arranged at a fixed position. Fig. 20 is a partial cross-sectional view showing a state in which the stopper 7 is disposed at the movable position. Fig. 18 to 20 correspond to the XVIII region in fig. 3.

As shown in fig. 4, in the use state, the blade 1 protrudes from the main body 2. Therefore, the user of the utility knife 100 can cut the object to be cut with the blade 1.

The stopper 6 is disposed at the first position in the use state. Thus, the slider 3 can move relative to the cap 4 in the use state. As shown in fig. 3 and 4, the slider 3 in the use state is disposed at a position forward of the slider 3 in the non-use state. The slider 3 is moved from the protruding position to the storage position by moving the slider 3 rearward from the protruding position by the urging force of the elastic body 5. That is, the utility knife 100 is switched from the use state to the non-use state by moving the slider 3 rearward by the urging force of the elastic body 5. Thus, the user of the utility knife 100 can switch the utility knife 100 from the use state to the non-use state by removing his/her hand from the slider 3 of the utility knife 100 in the use state.

As shown in fig. 5, when the stopper 6 is disposed at the second position, the slider 3 does not move relative to the cap 4. Therefore, the user of the utility knife 100 cannot move the slider 3 forward relative to the cap 4. Thus, the user of the utility knife 100 can maintain the unused state of the blade 1 stored in the main body 2. Thus, the user of the utility knife 100 can safely operate the utility knife 100. For example, a user of the utility knife 100 can safely store the utility knife 100 in a pocket.

When the stopper 6 is disposed at the first position or the second position, the lever 7 is disposed at the fixed position. When the lever 7 is disposed at the fixed position by rotating the first arm portion 72a and the second arm portion 72b with respect to the main body 2, the cap 4 is clamped together with the main body 2 by the body portion 71 to fix the cap 4 with respect to the main body 2. When the lever 7 is disposed at the fixed position, the cap 4 does not move relative to the main body 2.

As shown in fig. 6 and 7, when the stopper 6 is disposed at the third position, the lever 7 can be moved from the fixed position to the movable position. Thus, a user of the utility knife 100 can move the lever 7 to the movable position. When the lever 7 is disposed at the movable position by the first arm portion 72a and the second arm portion 72b being rotated with respect to the main body 2, the cap 4 is not sandwiched by the body portion 71 together with the main body 2, so that the cap 4 is movable with respect to the main body 2. When the lever 7 is disposed at the movable position, the cap 4 can move relative to the main body 2. Thus, the user of the utility knife 100 can withdraw the cap 4 from the main body 2 rearward.

As shown in fig. 15 and 16, the stopper 6 is moved from the first position to the second position, so that the slider 3 is engaged with the stopper 6. Thus, the slider 3 is stationary with respect to the cap 4. As shown in fig. 16 and 17, the cap 4 can be moved relative to the main body 2 in the case where the stopper 6 is moved from the second position to the third position.

As shown in fig. 18 and 19, the stopper 6 is moved from the second position to the third position to release the engagement of the lever 7 with the hinge 8. Specifically, the stopper 6 is moved from the second position to the third position by the stopper 6 so that the stopper 6 is brought into contact with the hinge 8. The stopper 6 is in contact with the first end 81 of the hinge 8. By the contact of the stopper 6 with the hinge 8, the hinge 8 is deformed so that the first end 81 of the hinge 8 moves rearward. By movement of the hinge 8, the first end 81 is moved away from the cap 4. Thereby, the fitting of the hinge 8 to the cap 4 is released. Thus, as shown in fig. 20, the lever 7 rotates from the fixed position to the movable position. The user of the utility knife 100 can rotate the lever 7 from the fixed position to the movable position. Thereby, the cap 4 can move relative to the main body 2.

To sum up, as shown in fig. 7, when the lever 7 is moved to the movable position by moving the stopper 6 to the third position, the user of the utility knife 100 can withdraw the cap 4 from the body 2. The cap 4 can be integrated with the blade 1, the slider 3, the elastic body 5 and the stopper 6 and extracted from the body 2. Thereby, the blade 1 extracted from the main body 2 can be replaced with another blade 1.

Next, the operational effects of the present embodiment will be described.

According to the utility knife 100 of embodiment 1, as shown in fig. 3 and 4, the cap 4 is fixed to the rear end portion 21b in a use state (see fig. 4) in which the slider 3 is disposed at the protruding position and a use state (see fig. 3) in which the slider 3 is disposed at the housed position. As shown in fig. 3, the slider 3 reaches the rear end portion 21b in the unused state. Thus, in the unused state, the blade 1 does not protrude from the front end portion 21a to the outside of the main body 2. Therefore, in the non-use state, the blade 1 does not protrude from the main body 2.

When the stopper 6 is disposed at the first position as shown in fig. 1, the slider 3 is not fixed to the cap 4, and when the stopper 6 is disposed at the second position as shown in fig. 5, the slider 3 is fixed to the cap 4. Therefore, by moving the stopper 6 to the first position or the second position, the state in which the slider 3 is not fixed to the cap 4 and the state in which the slider 3 is fixed to the cap 4 can be switched. Thus, when the user of the utility knife 100 uses the utility knife 100, the slider 3 can be moved to the protruding position by moving the slider 3 to the first position, and the utility knife 100 can be used. That is, by moving the slider 3 to the first position, the utility knife 100 can be brought into the use state. In addition, when the user of the utility knife 100 does not use the utility knife 100, the slider 3 can be fixed at the storage position by moving the slider 3 to the second position. That is, by moving the slider to the second position, the utility knife 100 can be brought into the unused state. Thus, the blade 1 can be prevented from being unintentionally protruded from the main body 2. Thus, for example, when the utility knife 100 is stored in the pocket of the user of the utility knife 100, the utility knife 100 can be safely stored in the pocket.

As shown in fig. 15, when the stopper 6 is disposed at the first position, the other side protruding portion 63 is disposed at a position closer to the root portion 33a than the intermediate first protruding portion 33d1 and the intermediate second protruding portion 33d2, so that the engagement between the intermediate first protruding portion 33d1 and the first concave portion 43c1 and the engagement between the intermediate second protruding portion 33d2 and the second concave portion 43c2 can be released, and when the stopper 6 is disposed at the second position, as shown in fig. 16, the other side protruding portion 63 is sandwiched between the intermediate first protruding portion 33d1 and the intermediate second protruding portion 33d2 so as to maintain the engagement between the intermediate first protruding portion 33d1 and the first concave portion 43c1 and the engagement between the intermediate second protruding portion 33d2 and the second concave portion 43c 2. Therefore, the release or maintenance of the engagement of the slider 3 with the cap 4 can be switched by the movement of the stopper 6.

As shown in fig. 1, the cap 4 is fixed to the body 2 when the lever 7 is disposed at the fixed position, and as shown in fig. 7, the cap 4 is fixed to the body 2 when the lever 7 is disposed at the movable position. Therefore, by disposing the lever 7 at the fixed position or the movable position, the state in which the cap 4 is fixed to the body 2 and the state in which the cap 4 is not fixed to the body 2 can be switched. Thus, when the user of the utility knife 100 uses the utility knife 100, the lever 7 is disposed at the fixed position, whereby the cap 4 can be fixed to the main body 2, and the cap 4 can be prevented from being detached from the main body 2. This prevents the cap 4 from being detached from the main body 2 in the use state or the non-use state. When the user of the utility knife 100 replaces the blade 1 of the utility knife 100, the lever 7 is disposed at the movable position, so that the cap 4 can be pulled out of the main body 2 together with the blade 1, the slider 3, the elastic body 5, and the stopper 6. Thus, when the cap 4 is detached from the main body 2, the blade 1, the slider 3, the elastic body 5, and the stopper 6 are not scattered but taken out integrally. Thereby, the blade 1 can be safely replaced.

As shown in fig. 3, when the lever 7 is disposed at the fixed position, the lever 7 can be rotated so that the rotation direction of the lever 7 is orthogonal to the first direction DR1, and when the lever 7 is disposed at the fixed position, the lever 7 does not move parallel to the first direction DR 1. Therefore, the lever 7 does not rotate in the case where a force in the first direction DR1 is applied to the lever 7. Thus, even if the slider 3 is biased in the first direction DR1 from the front end portion 21a to the rear end portion 21b by the elastic force of the elastic body 5 to collide with the cap 4, the lever 7 does not rotate. Therefore, even in the case where the slider 3 collides with the cap 4, the cap 4 is suppressed from coming off. Further, the cap 4 can be suppressed from coming off, and therefore, the blade 1 can also be suppressed from coming off the main body 2. This enables the blade 1 to be safely stored.

When the lever 7 is disposed at the fixed position by the rotation of the first arm portion 72a and the second arm portion 72b with respect to the main body 2 as shown in fig. 1, the cap 4 is sandwiched by the body portion 71 and the main body 2, and the cap 4 is fixed to the main body 2, and when the lever 7 is disposed at the movable position by the rotation of the first arm portion 72a and the second arm portion 72b with respect to the main body 2 as shown in fig. 7, the cap 4 is not sandwiched by the body portion 71 and the main body 2, and the cap 4 is movable with respect to the main body 2. Thus, the fixation of the cap 4 with respect to the main body can be maintained or released by rotating the lever 7.

As shown in fig. 19, when the stopper 6 is disposed at the third position and contacts the hinge 8, the hinge 8 is deformed by the contact with the stopper 6, and the fit with the cap 4 is released. The lever 7 is configured to be rotatable from the fixed position to the movable position by the stopper 6 being moved from the first position or the second position to the third position. Therefore, the fixation of the lever 7 can be released only by the movement of the stopper 6. Thus, the fixation of the lever 7 is easily released, and thus the blade 1 can be easily replaced. Further, as long as the stopper 6 is not moved to the third position, the fixation of the lever 7 is not released. This prevents the lever 7 from being released suddenly in the use state or the non-use state, and thus prevents the cap 4 from being pulled out suddenly. Thus, the utility knife 100 can be used more safely. The blade 1 can be replaced only when the stopper 6 is disposed at the third position. When the stopper 6 is disposed at the third position, the slider 3 is disposed at the storage position. Therefore, the blade 1 can be replaced only when the slider 3 is in the storage position.

Embodiment 2

Next, the structure of the utility knife 100 according to embodiment 2 will be described with reference to fig. 21. Embodiment 2 has the same structure and operation and effects as those of embodiment 1 described above unless otherwise specified. Therefore, the same components as those of embodiment 1 are denoted by the same reference numerals, and description thereof will not be repeated.

As shown in fig. 21, in the utility knife 100 of the present embodiment, the hinge 8 is formed separately from the lever 7. Fig. 21 is an enlarged view corresponding to fig. 18. For convenience of explanation, the elastic body 5 (refer to fig. 3) is illustrated in fig. 21. The hinge 8 is formed of, for example, sheet metal. The second end 82 of the hinge 8 is fixed to the lever 7 in a detachable state with respect to the lever 7. The hinge 8 is fixed to the lever 7, for example by a screw 83. For example, the second end 82 of the hinge 8 is fixed to the lever 7 by a screw 83.

Next, the operational effects of the present embodiment will be described.

According to the utility knife 100 of embodiment 2, as shown in fig. 21, the hinge 8 is formed separately from the lever 7. The hinge 8 is deformed by elastic deformation, and thus is easily degraded. In the case where the hinge 8 is integrally formed with the lever 7, the hinge 8 is broken due to deterioration of materials (for example, resin) constituting the hinge 8 and the lever 7, and thus can be separated from the lever 7. In the above case, the utility knife 100 becomes unusable. In contrast, according to the present embodiment, since the hinge 8 is formed separately from the lever 7, even when the hinge 8 is broken, the hinge 8 can be replaced with another hinge 8 that is not broken. This prevents the utility knife 100 from becoming unusable by the exchange of the hinges 8.

The present embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein.

(Symbol description)

1A blade; 2a main body; 3a sliding member; 4, capping; 5 an elastomer; 6, a limiter; 7, lever; 8 hinges; 21a front end portion; 21b rear end portion; 33a root; 33b1 first protrusions; 33b2 second protrusions; 33d1 intermediate first protrusions; 33d2 intermediate second protrusions; 42b1 first sidewall portion; 42b2 second sidewall portions; 42c1 first recess; 42c2 second recess; 49 slots; a 64 base; 63 other side protruding portion; 71 body; 72a first arm; 72b second arm; 100 art designing knife; DR1 first direction.

Claims (6)

1. An art designing knife, comprising:

a main body having a front end portion and a rear end portion opposite to the front end portion;

A slider configured to hold a blade inside the main body, and configured to be movable inside the main body between a protruding position at which the blade protrudes from the front end portion and a housed position at which the blade is housed between the front end portion and the rear end portion;

A cap securable to the rear end portion; and

An elastic body connecting the slider with the cover,

The cover is fixed to the rear end portion in a use state in which the slider is disposed at the protruding position and in a non-use state in which the slider is disposed at the storage position,

The elastic body urges the slider toward the cover in the use state and the non-use state,

The slider reaches the rear end portion in the non-use state.

2. The utility knife of claim 1, wherein,

The art designing knife also comprises a limiter,

The stopper is movably mounted to the slider with respect to the slider and is configured to be movable between a first position and a second position,

In the case where the stopper is disposed at the first position, the slider is not fixed to the cover,

The slider is fixed to the cap with the stopper disposed at the second position.

3. The utility knife of claim 2, wherein,

A groove is arranged on the cap cover,

The groove has: a first sidewall portion; a second side wall portion facing the first side wall portion with a space being free from the first side wall portion; a first recess provided to be recessed from the first side wall portion to a side opposite to the second side wall portion; and a second recess portion provided so as to be recessed from the second side wall portion toward a side opposite to the first side wall portion,

The slider has: root part; a first protruding portion protruding from the root portion to the groove portion along the first sidewall portion; a second protruding portion protruding from the root portion to the groove portion along the second side wall portion; an intermediate first protrusion connected to the first protrusion and engaged with the first recess; and an intermediate second protruding portion connected to the second protruding portion and engaged with the second recessed portion,

The stopper includes a base portion and another side protruding portion protruding from the base portion to between the first protruding portion and the second protruding portion,

When the stopper is disposed at the first position, the other side protruding portion is disposed at a position closer to the root than the intermediate first protruding portion and the second protruding portion, so that the engagement between the intermediate first protruding portion and the first concave portion and the engagement between the intermediate second protruding portion and the second concave portion can be released,

When the stopper is disposed at the second position, the other side protruding portion is sandwiched between the intermediate first protruding portion and the intermediate second protruding portion, so that the engagement between the intermediate first protruding portion and the first recessed portion and the engagement between the intermediate second protruding portion and the second recessed portion are maintained.

4. A utility knife according to claim 2 or 3, characterized in that,

The utility knife also comprises a lever,

The lever is rotatably mounted to the main body with respect to the main body and is configured to be rotatable between a fixed position and a movable position,

When the lever is disposed at the fixed position, the cap is fixed to the main body,

When the lever is disposed at the fixed position, the lever is rotatable so that a rotation direction of the lever is orthogonal to a first direction from the rear end portion to the front end portion and is not moved in parallel with the first direction,

In the case where the lever is disposed at the movable position, the cap is not fixed to the main body.

5. The utility knife of claim 4, wherein,

The lever includes: a first arm portion mounted rotatably with respect to the main body; a second arm portion mounted to be rotatable with respect to the main body on a side opposite to the first arm portion with respect to the main body; and a body connecting the first arm portion and the second arm portion,

When the lever is disposed at the fixed position by the rotation of the first arm portion and the second arm portion with respect to the main body, the cap is fixed with respect to the main body by the body portion sandwiching the cap with the main body,

When the lever is disposed at the movable position by the first arm and the second arm being rotated relative to the main body, the cap is movable relative to the main body because the body does not sandwich the cap together with the main body.

6. The utility knife according to claim 4 or 5, wherein,

The utility knife also comprises a hinge,

The hinge is mounted to the lever and is deformable,

The hinge is configured to be capable of being fitted with the cap in a state where the lever is disposed at the fixed position,

The lever is configured to be fixed in the fixed position by fitting the hinge with the cap,

The retainer is configured to move to a third position in which the retainer contacts the hinge,

The hinge is configured to be fitted with the cap when the stopper is disposed at the first position or the second position,

The hinge is configured to be deformed by contact with the stopper to release engagement with the cap when the stopper is disposed at the third position to contact with the hinge,

The lever is configured to be rotatable from the fixed position to the movable position by the stopper moving from the first position or the second position to the third position.