CN201055994Y - Safety changeable blade folding art designing knife - Google Patents

Abstract

The utility model relates to a folding art designer's knife of safe transform blade, it includes blade assembly spare and tool bit assembly spare, a blade inner chamber that blade assembly spare formed, blade assembly spare and tool bit assembly spare articulate the connection, be equipped with the key locking head on blade assembly spare, correspondingly, lie in folding position and expansion position on the tool bit and have main locking groove and vice locking groove to the key locking head department, the key stretches out in the blade side; the small button acts on the clamping head on the elastic sheet to clamp and fix the bayonet fixed blade on the blade, and the small button also extends out of the side surface of the cutter head assembly. Because this art designer's sword control is folding to be expanded and is unclamped the button and the little button of blade and all set up the side at the sword, still set up the locking structure under fold condition between tool bit and the blade, consequently, can not miss when using and touch button and little button, make the unexpected folding up of tool bit and the unexpected deviate from of blade, fold up the back and also can not make the unexpected expansion of tool bit. Has safer property.

Description

Folding utility knife with safety changing blade

technical field

The utility model relates to a utility knife, in particular to a folding utility knife with a safe changing blade.

Background technique

A kind of knife is provided in the prior art, see Chinese patent (patent number is ZL200420022241.8), this knife is provided with locking lever on the back of its longitudinal knife body, is provided with control button and locking projection on it, pushes along the plane of knife body And releasing the control button can control the locking protrusion to break away from and snap into the locking slot on the blade. There are some defects and hidden dangers in existing this cutting tool:

1-The folding switch of the knife head is set in the middle seam of the back of the knife. When the handle is held hard, it is easy to touch the switch. In severe cases, the knife head will fold out of control;

2-When the knife is in the folded state, there is no locking mechanism, and there is a chance of self-opening when external force is applied; children can open it easily;

3-The switch of the blade is set in the middle seam behind the cutter head, which is where the thumb should reach when using vigorously. When the switch is pressed, the blade will lose control and the cut object will be pulled out.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art, and to provide a folding utility knife with a safety changing blade with a locking mechanism in both the folded non-use state and the unfolded use state;

A further object of the present invention is to provide a folding utility knife with a blade that is securely fixed on the blade head so that the blade will not come out due to a mistaken touch and release of the blade switch during use.

The utility model purpose can be realized in the following ways:

The safety conversion blade folding utility knife provided by the utility model includes a blade body assembly and a cutter head assembly,

The blade assembly has a blade cavity, and the blade assembly is provided with an "L"-shaped groove on the long side below it and the short side in front, which communicates with the blade cavity. The front part of the knife body assembly is provided with a hinge hole, and a hinge shaft is fixed in the hole; The upper side of the tail of the assembly is provided with a concave positive locking groove, and the lower side of the tail is provided with a pair of locking grooves. Correspondingly, the button for locking together is installed on the blade body assembly, and one end of the blade is connected with the knife. The return spring provided on the body is fixed on the side wall of the blade inner chamber of the blade assembly, and its other end protrudes from one of the two sides of the blade assembly so that it can be pressed. The button is provided with a lock The head corresponds to the positive locking groove and the auxiliary locking groove on the cutter head assembly,

Its corresponding position is: when the cutter head assembly is in the use state extending out of the blade body assembly, the locking head on the button extends into the positive locking groove so that the cutter head is locked; when the cutter head assembly is in the folded When the knife body assembly is in the folded state, the locking head on the button extends into the auxiliary locking groove to lock the knife head; pressing the button makes the return spring compressed, and the locking head leaves the positive locking groove or the auxiliary locking groove, The cutter head assembly is released so that it can rotate around the hinge axis to fold or unfold;

A blade is detachably fixed in the cutter head assembly.

The cutter head assembly includes two parts, the right blade and the left blade of the blade fixed together, small buttons and shrapnel, and the right blade and the left blade of the blade are fixedly connected to form a Blade accommodation slot, wherein the blade is installed, the blade is provided with a switch bayonet, the elastic piece is fixed on the inner side wall of the blade accommodation groove, for example fixed on the right piece of the blade, and the elastic piece is provided with a shrapnel clip, so One end of the small button is mounted on the upper part of the cutter head accommodating groove and is connected with the shrapnel, and the other end protrudes from one of the two sides of the cutter head assembly so that it can be pressed; the shrapnel and the blade on the The positions of the switch bayonets are corresponding, and the corresponding positions are: the shrapnel is stuck into the bayonet of the blade under the action of its own elastic force to fix the blade. When the small button is pressed to move laterally, the shrapnel chuck leaves the bayonet on the blade. Release the blade and the blade can be removed.

Note: In this utility model, with the tip of the knife facing forward and the tail of the knife facing the user as the benchmark, the side of the tip of the knife is the front, and vice versa is the tail or rear. The side of the knife on the left is the left side, and vice versa is the right side , the direction perpendicular to the side of the knife is the horizontal direction.

The blade assembly may include a left blade, a right blade, a back rib and a tail piece that are fixedly connected together, thereby forming the inner chamber of the blade.

The hinge shaft is a copper sleeve, the copper sleeve is fixed on the hole of the right piece of the knife body, and is set in the hole of the left piece of the knife body, and the hole on the right piece of the knife head is set on the copper sleeve, The two ports of the copper sleeve are oppositely penetrated into a main nut and a screw, which are threaded and fixed in the copper sleeve.

It is the best choice that the button protrudes outside the left side of the blade assembly.

Further, the right side of the accommodating cavity formed by the right piece of the cutter head and the left piece of the cutter head of the cutter head assembly can be made linear, and the left side is concave, so that the blade can be easily put into the cutter head inside, and not easy to cut hands.

The small button protrudes outside the left side of the cutter head assembly.

Compared with the prior art, the folding utility knife with safe changing blades provided by the utility model has the following advantages:

1-The folding switch is set on the front side of the knife body, for example, it can be on the left side. Press the button switch to the right to release the knife head, which is different from the direction of force with a knife. It not only avoids accidental touch, but also facilitates the right thumb to press the switch in the direction of use:

2- There is a secondary locking slot at the bottom of the knife head tail. When the knife is in the folded state, the card head of the knife head folding switch extends into the card position to lock the knife head. Pull the cutter head out, the cutter head will not open, which is safer for children;

3-The blade switch is set on the front side of the cutter head, for example, it can be on the left side, press the switch to the right to release the blade, it is impossible to accidentally touch it, and it is convenient for the right thumb to press the switch in the direction of use.

Description of drawings

Fig. 1 is a schematic diagram of the decomposition structure of the folding utility knife with safety conversion blades provided by the utility model;

Fig. 2 is a schematic diagram of the internal structure of the utility model provided by the safety conversion blade folding utility knife;

Fig. 3 is a schematic diagram of the internal structure of the folding utility knife with safety transformable blades provided by the utility model;

Fig. 4 is a schematic diagram of the side appearance structure of the folding utility knife with safety transformable blades provided by the utility model;

Fig. 5 is a schematic diagram of the facade appearance structure of the folding utility knife with safety transformable blades provided by the utility model;

Fig. 6 is a schematic diagram of the internal structure of the safety conversion blade folding utility knife head assembly provided by the utility model.

Detailed ways

As shown in Figures 1-4, the folding utility knife with safe changing blades provided by the utility model includes a blade assembly and a blade assembly, and the blade assembly includes a right blade 1 and a left blade 2 that are fixedly connected together. , back rib 9 and tail part 8, so that a knife body cavity formed is used to accommodate the folded knife head assembly, and an "L" shaped groove is provided on the left side of the knife body and the short side of the front, which It communicates with the inner cavity of the knife body and provides an entrance for the knife head assembly to enter and exit the inner cavity. Hinge holes are set at the front of the right blade 1 and the left blade 2, and a matching copper sleeve 3 is provided, which is inserted in the hinge holes of the right blade 1 and the left blade 2, for example, can be fixed on On the left blade 2 of the knife body, use this as the hinged shaft hinged cutter head assembly.

As shown in Figures 1, 2, 3, 4, 5 and 6, the cutter head assembly includes a cutter head right piece 7 and a cutter head left piece 12 fixedly connected together, and a blade 13 is fixed therebetween. A hinged hole 71 is provided at the rear portion of the cutter head right piece 7, and is set on the copper sleeve 3, so that the cutter head assembly is hinged on the blade body assembly, and two pads are set on both sides of the cutter head assembly. A spacer 5 is provided with a main nut 4 and a screw 41 on both sides of the knife body assembly, which are threaded and fixed in a copper sleeve; a positive locking groove 72 is provided on the upper side of the tail of the right blade 7 of the knife head, and a positive locking groove 72 is arranged on the lower side of the tail. A pair of locking grooves 73 are provided, and correspondingly, the button 6 that locks together is fixed on the knife body, and a return spring (not shown) is provided between it and the knife body. Concrete, be provided with an " L " shape key groove 74 on the inside surface of blade right blade 1 , set return spring therein, establish an end of button 6 on it, the other end of button 6 is provided with from the hole that blade blade left blade 2 is provided with. The center protrudes outside, the shoulder on the button 6 and the inner surface of the left blade 2 of the blade form the stop of the button 6 . This button 6 is provided with a locking head 61 corresponding to the positive locking groove 72 and the auxiliary locking groove 73, and its corresponding position is: when the right blade 7 of the cutter head is in the state of use when stretching out the blade body (as shown in Figure 2, 3, 4, 5 As shown), the locking head 61 on the button 6 extends into the positive locking groove 72 (see Figure 2, 2a), so that the right piece 7 of the cutter head is locked; The locking head 61 on 6 extends into the auxiliary locking groove 73, so that the cutter head assembly is locked; press the button 6 to make the return spring compressed, and then the locking head 61 leaves the positive locking groove 72 or the auxiliary locking groove 73, and the cutter head right The sheet 7 can be folded or unfolded by turning around the hinge shaft, that is, the copper sleeve 3 .

The utility knife also has a locking structure in the folded state of the cutter head assembly, so that the cutter head assembly will not escape from the knife body cavity at will. Safer for children. The organ that releases the locking structure of the knife head, that is, the button 6 is arranged on the left side of the knife body. It will not happen that the parts are accidentally folded during use.

The cutter head assembly includes the cutter head right piece 7 and the cutter head left piece 12 which are fixedly connected together, forming a blade accommodating groove therebetween, wherein a blade 13 is set, and the blade 13 is provided with a bayonet 131, on the cutter head A shrapnel 10 is fixedly arranged on the inner side wall of the right piece 7, and a shrapnel clip 101 is provided on the shrapnel 10, and a shrapnel groove 75 is provided on the inner side of the cutter head right sheet 7, wherein the shrapnel 10 is fixed, and the shrapnel chuck 101 is established on the shrapnel 10; A small button 11 can also be fixed laterally movable on the inner surface of the right blade 7 of the cutter head. The perforation 121 of the knife head is pierced outside the left side of the left piece of the cutter head, and the corresponding positions of the shrapnel, shrapnel chuck, blade, and blade bayonet are: the shrapnel 10 snaps into the bayonet 131 of the blade 13 under the action of its own elastic force When the blade is fixed, when the small button 11 is pressed to move laterally, the shrapnel clip 101 leaves the bayonet 131 on the blade 13, and the blade 13 can be removed to replace the blade or change to another bayonet of the blade so that the blade is removed a paragraph.

The cutter head right sheet 7 is provided with the cutter head left sheet 12 to form the cutter head assembly, the inner surface of the cutter head right sheet 7 is linear, and the inner surface of the cutter head left sheet is concave, so that the formed blade accommodates The right side of the chamber is linear, and the left side is concave, that is, the front edge is recessed backward, so that the blade 13 can be easily put into the accommodating groove of the cutter head assembly, and it is not easy to cut hands.

Claims (7)

1. a security transformation blade folds cutter, and it is characterized in that: it comprises total member of blade and tool bit assembly spare,

The total member of described blade has a blade inner chamber, and the total member of blade thereunder long limit one side and minor face one side in the place ahead be provided with " L " shape groove, itself and blade intracavity inter-connection are established hinge hole in the front portion of the total member of blade, install jointed shaft in the hole; Tool bit assembly spare is provided with hinged axis hole, be set on the jointed shaft on the total member of described blade, afterbody upside at described tool bit assembly spare is provided with a positive lock slots, the afterbody downside is provided with a secondary lock slots, correspondingly, the button of locking action together is housed on the total member of described blade, the one end is fixed on the blade intracavity sidewall of the total member of blade by the return spring that is provided with blade, its other end stretches out the outside in one of the total member of blade two sides, it is corresponding with described positive lock slots and secondary lock slots on the tool bit assembly spare that this button is provided with elongated insertion part, its correspondence position is: when tool bit assembly spare is in when stretching out the total member of blade and being user mode, the elongated insertion part on the described button stretches into positive lock slots makes cutter head locked; Fold into the total member of blade when being folded state when tool bit assembly spare is in, the elongated insertion part on the described button stretches into secondary lock slots makes cutter head locked; Pressing keys makes return spring be compressed, and then elongated insertion part leaves described positive lock slots or secondary lock slots, and released the making it of tool bit assembly spare can fold or launch around described jointed shaft rotation;

Fixed blade removably in the described tool bit assembly spare.

2. security transformation blade according to claim 1 folds cutter, it is characterized in that: described tool bit assembly spare comprises right sheet of the cutter head that connects firmly together and cutter head left side sheet meter two chip parts, little button and shell fragment, right sheet of described cutter head and cutter head left side sheet connect firmly, form a blade storage tank betwixt, wherein adorn described blade, blade is provided with the switch bayonet socket, described shell fragment is fixed on the madial wall of blade storage tank, shell fragment is provided with spring fixing heads, one end of described little button is contained in cutter head top, link to each other with shell fragment, its other end stretches out in the outside of one of tool bit assembly spare two sides, makes it and can be pressed; Position correspondence between the switch bayonet socket on described shell fragment and the blade, its correspondence position is: shell fragment snaps in fixed blade in the bayonet socket of blade under self resilient force, is pressed laterally when mobile when little button, and spring fixing heads leaves the bayonet socket on the blade, unclamp blade, blade can be moved out of.

3. security transformation blade according to claim 1 and 2 folds cutter, it is characterized in that: the total member of described blade comprises blade left side sheet, the right sheet of blade, backing strip and the tail piece that connects firmly together, forms described blade inner chamber thus.

4. security transformation blade according to claim 2 folds cutter, it is characterized in that: described tool bit assembly spare is linear by the right side of the containing cavity that right sheet of cutter head and cutter head left side sheet meter two chip parts constitute, and the forward position in left side is recessed backward.

5. security transformation blade according to claim 1 and 2 folds cutter, it is characterized in that: be used for the folding described button of cutter head and stretch out outside at the left surface of the total member of described blade.

6. security transformation blade according to claim 1 and 2 folds cutter, it is characterized in that: the described little button that is used for the blade switch stretches out the outside at the left surface of described cutter head.

7. security transformation blade according to claim 1 folds cutter, it is characterized in that: described jointed shaft is a copper sheathing, this copper sheathing is fixed on the hole of the right sheet of described blade, be located in the hole of described blade left side sheet, establishing the hole on the described cutter head is located on this copper sheathing, two-port at copper sheathing penetrates mother nut and screw relatively, its be located in be spirally connected in the copper sheathing fixing.

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