CN102335920A - Cutting knife capable of increasing effective using length of blade - Google Patents

Abstract

The invention discloses a cutting knife capable increasing the effective using length of a blade. The cutting knife comprises a knife body, a knife rest and a blade; the knife rest is movably connected to the knife body; in the state that the blade is loaded on the knife rest, the length of a blade cutting edge exposed out of the knife rest is at least more than one half the total length of the blade cutting edge; and the corresponding surface of the blade cutting edge is positioned in the knife rest. A front section of the knife rest has a shape which is extended downward and backward. The front section of the knife rest has a structure of an inner arc line or a broken line; and the edges of two sides of the section have a structure of an inversed-angle-shaped inclined surface. Therefore, the lower part where the blade is connected with the knife rest can be exposed out of the cutting edge part, the length of the blade cutting edge exposed out of the knife rest can be effectively increased, the effective using length for cutting of the blade is increased, and the problem that the blade is easy to break when used is simultaneously avoided.

Description

Prolong the cutting knife that blade effectively uses length

[technical field]

The present invention relates to a kind of cutter, relate in particular to the cutting knife that a kind of situation decurrence long blade that does not influence blade stability is effectively used length.

[background technology]

This hand tools of cutting knife is widely used in repair of machine, house decoration, occasion such as cuts.Traditional cutting knife generally comprises cutter hub, knife rest and blade.See also Fig. 1, knife rest 12 is movably connected on the cutter hub 11, and the rear end of blade 13 is inlaid on the knife rest 12 usually.In order to ensure the steadiness of blade on knife rest blade easy fracture not when using, it is very short that blade 13 cutting edges expose the length of knife rest 12, is generally half the less than blade 13 cutting edge total lengths.Though such design has strengthened the steadiness of blade, when the user of service utilized this blade cutting edge to cut, the restriction of depth of cut certainly will cause the limitation and the inconvenience of use.

[summary of the invention]

The technical problem that the present invention solves is to overcome the defective that prior art exists, and provides a kind of simple in structure, and depth of cut is deepened, so improve ease of use a kind ofly prolong the cutting knife that blade effectively uses length.

A kind of cutting knife comprises cutter hub, knife rest and blade, and knife rest is movably connected on cutter hub; Blade is loaded into knife rest, it is characterized in that, blade is loaded under the state of knife rest; Blade cutting edge exposes knife rest length and is at least the over half of blade cutting edge total length, and the blade cutting edge corresponding surface is in the knife rest.

Preferably, said blade is loaded under the state of knife rest, and blade cutting edge exposes the 50%-77% that knife rest length is the blade cutting edge total length.

And preferably, the rear portion of knife rest is movably connected on cutter hub, and the front of knife rest is the shape and structure that extends to oblique rear down.

More preferably, the front of knife rest is interior camber line or broken line shape structure, and the both sides of the edge, cross section are chamfering shape ramp structure.

In addition, non-operation, knife rest and blade are hidden in the cutter hub.

Also have, blade cutting edge corresponding surface place is provided with some U type grooves, and a blade locking mechanism is set on knife rest, and the blade locking mechanism adjustable ground is locked in wherein on the U type groove.

In addition, described cutter hub afterbody is provided with a U type toggle and opens and closes and to buckle.

Compared with prior art, blade cutting edge of the present invention exposes knife rest length and is at least the over half of blade cutting edge total length, and the blade cutting edge corresponding surface is in the knife rest, has promoted effective use length of blade cutting edge.Make the cutting knife depth of cut deepen, and then improve ease of use.

Also have, the front of knife rest is interior camber line or broken line shape structure, and the both sides of the edge, cross section are chamfering shape ramp structure.The bottom that such design makes blade be connected with knife rest can also expose the cutting edge part, increased the length that blade cutting edge exposes knife rest effectively, the problem of fracture easily when also having avoided simultaneously using blade.

[description of drawings]

Fig. 1 is that traditional first an example cutting knife master looks sketch map;

Fig. 2 looks sketch map for the present invention first master of example cutting knife under a user mode;

Fig. 3 is internal structure sketch map under the present invention's first example cutting knife backsight state;

Fig. 4 is the present invention's first example cutting knife decomposing schematic representation;

Fig. 5 looks sketch map for the present invention second example cutting knife master;

Fig. 6 is internal structure sketch map under the present invention's second example cutting knife backsight state.

[specific embodiment]

See also Fig. 1 to Fig. 4, a kind of cutting knife of the present invention comprises blade 21, knife rest 22 and cutter hub 23.Blade 21 is loaded into knife rest 22, and blade cutting edge 31 exposes knife rest 22 length and is at least the over half of blade cutting edge 31 total lengths, and blade cutting edge 31 corresponding surfaces are in the knife rest 22.In this example, the rear end of blade 21 is inlaid in the knife rest 22, and fixing through cover plate 24.A kind of implementation does, the screw 36 of some correspondences is set respectively on cover plate 24 and the knife rest 22, fixes through bolt 35.In this example, the afterbody of cutter hub 23 is provided with U type toggle switching and buckles 45.

It is long more to consider that blade cutting edge 31 exposes knife rest 22 length, fracture more easily when using blade 21.In order to address this problem, the present invention is to the oblique shape and structure that extends of rear down with the front 41 of knife rest 22.Preferably, the front 41 of knife rest 22 is interior camber line (as shown in Figure 5) or broken line shape structure (as shown in Figure 2), and the both sides of the edge, cross section are chamfering shape ramp structure.Equally, the also corresponding shape and structure that is set to tiltedly descend the rear extension of the front 37 of cover plate 24.Accordingly, the front 37 of cover plate 24 is interior camber line or broken line shape structure, and the both sides of the edge, cross section are chamfering shape ramp structure.The bottom that such design makes blade 21 be connected with knife rest 22 can also expose cutting edge 31 parts, increased the length that blade cutting edge 31 exposes knife rest 22 effectively, the problem of fracture easily when also having avoided simultaneously using blade 21.Show that through experiment under this design, when blade 21 was loaded into the state of knife rest 22, blade cutting edge 21 exposed the 50%-77% that knife rest 22 length can be exempted from 1 total length for blade cutting edge.See also Fig. 5 to Fig. 6, it is the structural representation of the present invention's second example cutting knife, and the front 43 of knife rest 22 is interior camber line, design like this, and blade cutting edge 21 exposes knife rest 22 length can be the 50%-77% of blade cutting edge total length.See also Fig. 2 and Fig. 5 again, compare with the cutting knife of Fig. 1, blade cutting edge 21 of the present invention exposes knife rest 22 length can increase d length.

In addition, blade cutting edge 31 corresponding surface places are provided with some U type grooves 33, and a blade locking mechanism 32 is set on knife rest, and blade locking mechanism 32 adjustable grounds are locked in wherein on the U type groove 33.At this instance, blade locking mechanism 32 can for a cutter head set bolt 34. through cutter head set bolt 34 fixing in wherein in the U type groove 33, reach and change the length that blade cutting edge 21 exposes knife rest 22.

In this example, cutter hub 23 comprises left cutter hub 26 and right cutter hub 25.The rear portion of knife rest 22 is movably connected on cutter hub 23, and can unfold with respect to cutter hub 23.In this example; One fixing hole 38 is set on the rear portion of knife rest 22; The front portion of the inboard of right cutter hub 25 is provided with a knife rest set bolt 40, and the front portion of left cutter hub also is provided with a fastener hole 39, after knife rest set bolt 40 passes fixing hole 38 and fastener hole 39 respectively; Fix with a nut (among the figure indicate), reach the fulcrum of the rear portion of knife rest 22 forming thus and be movably connected on cutter hub 23 with knife rest set bolt 40 and nut.During operating conditions; Right cutter hub 25 inboard convexities 42 are against in the groove 43 at knife rest 22 rear portions just; During non-operation; Under the effect of external force, right cutter hub 25 inboard convexities 42 are separated with the groove 43 at knife rest 22 rear portions, and the fulcrum activity that the rear portion of knife rest 22 is formed with knife rest set bolt 40 and nut is folded in the cutter hub 23.

During use, open with knife rest set bolt 40 and the fulcrum that nut is formed at the rear portion of knife rest 22, adjusts the length that blade cutting edge 21 exposes knife rest 22 through blade locking mechanism 32.Such as; Can blade cutting edge 21 be exposed knife rest 22 and be adjusted into the longest length; During non-operation, earlier blade cutting edge 21 is exposed knife rest 22 and is adjusted into the shortest length, after fulcrum activity that the rear portion of knife rest 22 is formed with knife rest set bolt 40 and nut be folded in the cutter hub 23.The volume of whole like this cutting knife dwindles greatly, and convenient collection is perhaps carried.

More than describe and be merely embodiments of the invention, forgive and to understand, under the prerequisite that does not depart from the present invention's design, all should be included within the technical conceive of the present invention simple modification of the present invention and replacement.

Claims (6)

1. one kind prolongs the cutting knife that blade effectively uses length; Comprise cutter hub, knife rest and blade, knife rest is movably connected on cutter hub, and blade is loaded into knife rest; It is characterized in that; Blade is loaded under the state of knife rest, and blade cutting edge exposes knife rest length and is at least the over half of blade cutting edge total length, and the blade cutting edge corresponding surface is in the knife rest.

2. cutting knife as claimed in claim 1 is characterized in that, blade is loaded under the state of knife rest, and blade cutting edge exposes the 50%-77% that knife rest length is the blade cutting edge total length.

3. cutting knife as claimed in claim 1 is characterized in that the rear portion of knife rest is movably connected on cutter hub, and the front of knife rest is the shape and structure that extends to oblique rear down.

4. cutting knife as claimed in claim 3 is characterized in that, the front of knife rest is interior camber line or broken line shape structure, and the both sides of the edge, cross section are chamfering shape ramp structure.

5. cutting knife as claimed in claim 1 is characterized in that, blade cutting edge corresponding surface place is provided with some U type grooves, and a blade locking mechanism is set on knife rest, and the blade locking mechanism adjustable ground is locked in wherein on the U type groove.

6. cutting knife as claimed in claim 1 is characterized in that, described cutter hub afterbody is provided with U type toggle switching and buckles.

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