CN201304651Y

CN201304651Y - Cutting knife

Info

Publication number: CN201304651Y
Application number: CNU2008201554461U
Authority: CN
Inventors: 温昊
Original assignee: Shanghai Kunjie Hardware Tool Co Ltd
Current assignee: Shanghai Kunjie Hardware Tool Co Ltd
Priority date: 2008-11-17
Filing date: 2008-11-17
Publication date: 2009-09-09
Anticipated expiration: 2018-11-17

Abstract

The utility model provides a cutting knife which comprises a knife handle, a knife rest, a blade, a worm wheel, rockers, a pin roll and return torsion springs. A groove cavity is formed on the knife handle and used for mounting the parts; the groove cavity passes through the left knife handle to form an opening allowing fingers to be inserted in; the inner end of the knife rest is a section of a worm; the pin roll transversally spans the groove cavity of the knife handle; two rockers are sleeved on the pin roll and can rotate around the pin roll; the worm wheel is arranged between the two rockers; the two rockers pass through the worm wheel in the axial direction; the lower part of the worm wheel is meshed with the worm to form a locking state; one side surface of the worm wheel is exposed to the opening of the left knife handle; the worm wheel can be pushed by external force to swing inwards so as to be separated from the worm and achieve the purpose of unlocking; and two return torsion springs are respectively arranged at the two ends of the pin roll and drives the worm wheel to return to the original position. The cutting knife can realize quick locking and unlocking, and forward and backward adjustment of the blade. The cutting knife has the advantages of reasonable structure, convenient use, safety and reliability.

Description

Cutting knife

Technical field

The utility model relates to a kind of hand-held tool, relates in particular to a kind of cutting knife.

Background technology

Traditional cutting knife is divided into fixed, collapsible and telescopic usually, generally is used for cutting paper, cloth, leather etc.Telescopic cutting knife generally is to utilize to push the blade that sliding shoe promotes to be hidden in the handle of a knife and stretch out, but blade stretches out before and after stretching out, often can not all form locking, causes can occurring under certain conditions becoming flexible, and the influence use also can produce potential safety hazard.

The utility model content

The purpose of this utility model is exactly in order to provide a kind of cutting knife that can both lock before blade stretches out and after stretching out.

In order to achieve the above object, the utility model has adopted following technical scheme: a kind of cutting knife comprises the handle of a knife that combined by left handle of a knife and right handle of a knife, is clipped in the knife rest in the middle of the handle of a knife and is inlaid in blade on the knife rest; Also comprise a worm gear, two rocking arms, a bearing pin and two return torsion springs; Described handle of a knife is provided with the vallecular cavity that is used to install above-mentioned parts, and this vallecular cavity runs through left handle of a knife and forms an opening of allowing that finger inserts; The inner of described knife rest is one section worm screw; The bearing pin crossbearer is in the vallecular cavity of handle of a knife, two rocking arms are worn and are hung on the bearing pin and can rotate around bearing pin, worm gear be arranged between two rocking arms and by two rocker arm shafts to penetrating, the bottom of worm gear and worm engaging form locking, a side of worm gear is exposed in the opening of left handle of a knife, worm gear can promote it by external force and inwardly be rocked to and break away from worm screw and realize release, and the two ends that two return torsion springs are separately positioned on bearing pin can drive the worm gear return.

Described two rocker structure symmetries are identical, comprise that respectively one is used for axis hole and a minor axis that is used for axially penetrating in the worm gear of linking to each other with bearing pin, is provided with a step below axis hole; Described return torsion spring is set on the bearing pin, and the one end is pressed on the step of rocking arm, and the other end is pressed on the inboard of left handle of a knife.

The utility model cutting knife can be realized quick lock in and release owing to adopted the worm and gear locking mechanism, and can realize the front and back adjusting of blade.Has advantage rational in infrastructure, esy to use, safe and reliable.

Description of drawings

Fig. 1 is a perspective view of the present utility model;

Fig. 2, Fig. 3 are decomposition texture schematic diagrames of the present utility model;

Fig. 4 is the perspective view of the rocking arm in the utility model;

Fig. 5, Fig. 6 are lock-out state structural representations of the present utility model;

Fig. 7 is a released state schematic diagram of the present utility model.

The specific embodiment

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, cutting knife of the present utility model comprises the handle of a knife 1 that combined by left handle of a knife 11 and right handle of a knife 12, is clipped in knife rest 2 in the middle of the handle of a knife, is inlaid in blade 3 on the knife rest, worm gear 4, two Rocker arm 5s, a bearing pin 6 and two return torsion springs 7.Be provided with the vallecular cavity 13 that is used to install above-mentioned parts on handle of a knife 1, this vallecular cavity runs through left handle of a knife and forms an opening 14 of allowing that finger inserts, and the inner of knife rest 2 is one section worm screw 21.Bearing pin 6 crossbearers are in the vallecular cavity 13 of handle of a knife, two Rocker arm 5s are worn and are hung on the bearing pin 6 and can rotate around bearing pin, the symmetrical configuration of two rocking arms is identical, comprise that respectively is used for an axis hole 51 and a minor axis 52 that is used for axially penetrating in the worm gear that links to each other with bearing pin, below axis hole, be provided with a step 53, return torsion spring 7 is set on the bearing pin 6, and the one end is pressed on the step 53 of rocking arm, and the other end is pressed on the inboard of left handle of a knife.Worm gear 4 is arranged between two rocking arms and is axially penetrated by the minor axis 52 of two rocking arms, the bottom of worm gear and worm screw 21 engagements form locking, a side of worm gear is exposed in the opening 14 of left handle of a knife, worm gear can promote it by external force and inwardly be rocked to and break away from worm screw and realize release, and the two ends that two return torsion springs 7 are separately positioned on bearing pin can drive the worm gear return.

Course of work principle of the present utility model can be described as follows in conjunction with Fig. 5, Fig. 6, Fig. 7:

When using, hold handle, in the opening 14 insertion handles of left handle of a knife, touch turbine 4, worm gear 4 is pushed away worm screw 21, unlock, as shown in Figure 7 with a finger (as the third finger).With the push button 22 on the thumb promotion knife rest 2, promote forward to promote to returning sword backward then for going out cutter.Go out cutter or return sword put in place after, finger unclamps worm gear, under the effect of return torsion spring 7, Rocker arm 5 drives turbine 4 returns, forms locking with worm screw 21 engagements again, as Fig. 5, shown in Figure 6.Just can use safely going out under the cutter state, can not become flexible.As need the extension elongation of blade to finely tune, and only need rotation worm gear 4, can drive worm screw 21 and advance or retreat, to do the anteroposterior position transposition of trace whole thereby drive blades 3 by knife rest 2.

Claims

1, a kind of cutting knife comprises the handle of a knife that combined by left handle of a knife and right handle of a knife, is clipped in the knife rest in the middle of the handle of a knife and is inlaid in blade on the knife rest; It is characterized in that: also comprise a worm gear, two rocking arms, a bearing pin and two return torsion springs; Described handle of a knife is provided with the vallecular cavity that is used to install above-mentioned parts, and this vallecular cavity runs through left handle of a knife and forms an opening of allowing that finger inserts; The inner of described knife rest is one section worm screw; The bearing pin crossbearer is in the vallecular cavity of handle of a knife, two rocking arms are worn and are hung on the bearing pin and can rotate around bearing pin, worm gear be arranged between two rocking arms and by two rocker arm shafts to penetrating, the bottom of worm gear and worm engaging form locking, a side of worm gear is exposed in the opening of left handle of a knife, worm gear can promote it by external force and inwardly be rocked to and break away from worm screw and realize release, and the two ends that two return torsion springs are separately positioned on bearing pin can drive the worm gear return.

2, cutting knife as claimed in claim 1 is characterized in that: described two rocker structure symmetries are identical, comprise that respectively one is used for axis hole and a minor axis that is used for axially penetrating in the worm gear of linking to each other with bearing pin, is provided with a step below axis hole; Described return torsion spring is set on the bearing pin, and the one end is pressed on the step of rocking arm, and the other end is pressed on the inboard of left handle of a knife.