GB2398754A

GB2398754A - Improvements to an artistic knife

Info

Publication number: GB2398754A
Application number: GB0304345A
Authority: GB
Inventors: Yin-Hae Huang; Shih-Chin Shih
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-02-26
Filing date: 2003-02-26
Publication date: 2004-09-01
Anticipated expiration: 2023-02-26
Also published as: GB2398754B; ZA200506155B; GB0304345D0

Abstract

An artistic knife with adjustable handle includes a straight handle 1 which is combined with a pair of first 10 and second halves 20, a head 30 rotatably gripped by the straight handle 1 and having a blade 31 on front end and an annular ring on rear end sleeved on a tubular projection 11 of the first half 10. The annular ring has an inner flange in which a plurality of pairs of mortises is symmetrically formed. A positioning member 40 disposes into the tubular projection 11 and biased by a spring 12 and has a protrudent surface engaged within a circular through hole of the second half 20 through the annular ring and a large tenon and a small tenon on opposing outer peripheries respectively engaged with the mortises. Thereby, press the positioning member 40 inward to enable the head 30 to rotate a certain degree of angle between the head 30 and the straight handle 1. Then release the positioning member which controls the movement of the head 30.

Description

TITLE: An artistic knife with multi-angle adjustable handle

BACKGROUND OF THE INVENTION

The present invention relates to cutters and more particularly to an artistic knife with adjustable handle which handle can be bent into different angles in order to fit the requirement of the users.

Normally, a heavy duty artistic knife has a blade in one end of the handle which may be in straight form or in arcuate form. The blade in a straight handle forms a small angle lo with a work piece. Whereas the blade in an arcuate handle can form a large angle with the work piece. So that the user has to prepare a lot of artistic knives of different angled handlesin order to finish hisjob, causing great inconvenience.

A heavy duty artistic knife usually has trapezium double blades which two ends of the blade can be changed. The blade can become blunt if strong force is applied and causes users have to change the blade frequently. Conventional heavy duty artistic knifes use screw type gripping device to grip the blade in position, losing the screw gripping device allows go sliding of the blade. The gripping force sometimes is not strong enough and can cause danger and it is also inconvenience for users to change the blade.

SUMMARY OF THE PRESENT INVENTION

The present invention has a main object to provide an artistic knife with adjustable handle for which the user can be able to change the angle ofthe blade relative to the straight portion of the handle to perform his job on a work piece.

Another object is to provide a rotatable blade rack to allow quick changing and assembly of the blade and yet can provide strong gripping force on the blade to prevent from sliding accidentally.

Yet another object is to provide a means of storage for blades and other small accessories.

Yet another object of the present invention is to provide lo an artistic knife with adjustable handle by which the user can save a large sum of cost by enjoy a great convenience.

Accordingly, the artistic knife of the present invention comprises generally a straight handle combined with a first half and a second half, a head having a blade in a first end and an annular ring rotatably sleeved on a tubular projection of the first half and a positioning member controlling the movement of the annular ring. The annular ring has pairs of mortises spacedly and symmetrically formed in the inner periphery made in registry with a large tenon and a small tenon do which are symmetrically formed on opposite outer periphery of the positioning member. Upon the above structure, press in the positioning member to disengage the tenons with the mortises in order to set the head free to rotate. Then release the positioning member, the tenons will automatically engage with a pair of mortises. So that the head is already turned a certain angle relative to the straight portion of the handle.

The present invention will become more fully understood by reference to the following detailed description thereof when read in conjunction with the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is an exploded perspective view to show the preferred embodiment of the present invention, Figure 2 is a top sectional view to show the assembly of the present invention, lo Figure 3 is a side section of Fig. 2, Figure 4 is a perspective view of a multi-angle adjustable handle, Figure 5 is a top sectional view of Fig. 4, Figure 6 is a side view of Fig. 5, Figure 7 is a perspective view of a multi-angle adjustable handle with the blade rack being rotated downwards, Figure 8 is a side view of Fig. 7, Figure 9 is a sectional view of Fig. 7, and Figure 10 is a sectional view of a multi-angle adjustable JO handle with the tool box being pulled outwards.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

With reference to Figs. 1, 2 and 3 of the drawings, the artistic knife with adjustable handle of the present invention comprises a straight handle 1 which is combined with a first half 10 and a second half 20 rotatably gripped by the straight handle and a positioning member 40 controlling the movement of the head 30, and a tool box 50.

The first half 10 has a tubular projection 11 projected inward from an inner surface abutting the front end thereof including an axial slot 111 in a peripheral wall and a circular groove 112 in the bottom for engaging one end of a spring 12, a pair of transverse screw holes 13 and 14 spacedly formed in the body and a rectangular groove 15 in an inner surface of the rear end of the first half 10.

lo The second half 20 has a circular through hole 21 adjacent front end made in registry with tubular projection 11 of the first half 10, a pair of transverse screw holes 22 and 23 spacedly formed in the body engaged with the screw holes 13 and 14 of the first half 10 and a rectangular groove 26 in an inner surface abutting the rear end made in registry with the rectangular groove 15 of the first half 10 (as shown in Fig. 3).

The head 30 has a blade 31 secured to front end and an annular ring 32 on rear end sleeved on the tubular projection of the JO first half. The annular ring 32 has two pairs of mortises 321, 324 and 322 and 323 symmetrically formed in an inner flange thereof.

The positioning member 40 is a circle in shape, a protrudent surface 41 on front side, an annular flange 42 on back side, a large tenon 43 and a small tenon 44 symmetrically formed on opposing peripheries abutting the flange 42 and a circular groove 45 in the bottom for engaging other end of the spring 12 (as shown in Fig. 2). Which provides resilience to the positioning member 40.

The inner side of the first half 10 has a space 16, the inner side of the second half 20 also has a space 27 in correspondence with the space 16. The spaces 16 and 27 form the tool box 50.

A rail 161 is disposed inside the space 16 on its inner surface.

The space 27 of the second half 20 also has a rail 271. Each lo side of the tool box 50 has protrudent rods 51 and 52 for sliding into the rails 161 and 271 respectively. The protrudent rods 51 and 52 are hollow for a rod 53 to go through. The inside bottom of the tool box 50 has a protrudent block 54 ( as shown in Fig.3) for a spring 55 to sleeve on. A block 56 is disposed near one end on each side of the tool box 50.

The blocks 56 can slide on the rails 161 and 271. At one end of the tool box 50 is connected to a handle 57 for fingers to grip on. A small box 58 is disposed on top of the spring 55. The small box 58 are storedinside the tool box 50 connected JO by the rod 53, so that the small box 58 can be resiliently moved upwards and downwards from the too box 50. The top of the small box 58 has a slant surface 581 which allows the small box 58 to go inside the spaces 16 and 27 of the first half 10. One end of the small box 58 is opened for storing blades or other accessories. s

The head 30 has a blade groove 33, a protrudent stopping block 331 is disposed on the inside surface. The annular ring 32 of the head 30 has a slit 325, which is connected to the blade groove 33 in a straight line for storing a blade rack 34. At the rear end of the blade rack 34 has a positioning ring 341. The positioning ring 341 is inserted into the slit 325 of the annular ring 32. Thus the positioning ring 341 end the annular ring 32 are both sleeve on the tubular projection 11 of the first half 10, and the blade rack 34 is inserted into lo the blade groove 33 of the head 30. One side of the blade rack 34 has a surface 342 and a rod 343 is inserted on the surface 342. A hole 345 is disposed on the surface 342 for inserting a magnet 344. Two grooves 346 are disposed on the top edge of the blade rack 34, a protrudent board 347 is disposed on the bottomofthe blade rack 34. A few convex lines 348 are disposed on the protrudent board 347. Both the protrudent board 347 and the convex lines 348 are for fingers to grip on. Two protrudent pieces 301 are disposed inside the head 30 in corresponding with the two grooves 346. Grooves 311 are disposed So on the top edge of the blade 31 and the grooves 346 of the blade rack 34 are for the two protrudent pieces 301 to rest on. The rod 343 of the blade rack 34 go through a hole 312 of the blade 31.

When assembling, first dispose the spring 12 and the positioning member 40 into the tubular projection 11 of the first half 10 with the large tenon 42 slidably engaged into the axial slot 111, then sleeve the annular ring 32 of the head 30 onto the tubular projection 11 so that the positioning member will not beJumped out due to the inner flange of the annular ring 32. Finally, combine the second half 20 of the straight handle 1 with the first half 10 and secured by a pair of screws 24 and 25 through the screw holes 13, 22, 14, and 23.

Insert the positioning ring 341 of the blade rack 34 into the slit 325 of the head 30, and the blade rack 34 into the blade JO groove 33, then sleeve the annular ring 32 of the head 30, together with the positioning ring 341 of the blade rack 34, on the tubular projection 11 of the first half 10.

After the accomplishment of assembly, the tenons 43 and 44 are respectively engaged with the mortises 321 and 324 and the protrudent surface 41 is engaged within the circular through hole 21 of the second half 20. Therefore, the head 30 is parallel to the straight handle 1. The rectangular grooves 15 and 26 of the first and second halves 10 and 20 are combined into a rectangular cavity for the engagement of a shank of a So screwdriver therein (as shown in Fig. 3). Insert the tool box together with the small box 58 into the spaces 16 and 27 of the straight handle 1, and the protrudent rods 51 and 52 onto the rails 171 and 271 for positioning the tool box 50.

Referring to Figs. 4, 5 and 6, when press the protrudent 25surface 41 of the positioning member 40 inward, the tenons 43 and 44 are disengaged with the mortise 321 and 324 so as to set the head 30 free to rotate counterclockwise for a certain degree of angle. Then release the positioning member 40, the tenons 43 and 44 will be automatically engaged with the mortises 322 and 323 so that the head 30 forms a certain degree of angle with the straight handle 1 to permit the user to cut the work piece in deference manner. Actually, more mortises can be made in the inner flange of the annular ring 30 in order to facilitate the use to make different angles between the head lo 30 and straight handle 1.

As shown in Figs. 7, 8 and 9, press the blade rack 34 downwards forinserting the blade 31, simple pull the protrudent board 347 of the blade rack 34 to one side to allow the blade rack 34 go downwards. Then make the blade 31 in contact with the surface 342 of the blade rack 34, in order to make the rod 343 to go through the hole 312 of the blade 31, also the grooves 346 of the blade rack 34 are corresponding with the grooves 311 of the blade 31, because the blade 31 is attracted by the magnet 344 of the blade rack 34, the blade 31 is easily JO positioned on the blade rack 34, finally, push the blade rack 34 into the blade groove 33 of the head 30. Thus the protrudent pieces 301 of the blade rack 34 are inserted into the grooves 346 of the blade rack 34 and the grooves 311 of the blade 31, and the blade 31 is inserted inside the blade groove 33 of the head 30 and will not drop down. As shown in Fig. 10, the small box 58 inside the tool box 50 is for storing the blade 31 and other accessories. Hold the handle 57 to pull the tool box 50 outwards, and the small box 58 has its one end pointing slantingly upwards because of the elasticity of the spring 55, for convenience of getting the blade 31 from the small box 58. The present invention is designed in such a way for convenient of assembling and positioning of blade 31, without having loose blade to cause danger and to disassembling the whole handle. Thus provide a JO safe and convenient.

Note that the specification relating to the above embodiment should be construed as exemplary rather than as limitative of the present invention, with many variations and modifications being readily attainable by a person of average skill in the Is art without departing from the spirit or scope thereof as defined by the appended claims and their legal equivalents.

I CLAIM: 1. An artistic knife with adjustable handle comprising: Ia straight handle which is combined with|a first half and a second half; said first half havinga tubular projection projected inward from an inner surface abutting front end thereof, said tubular projection including an axial slot in a peripheral wall and a first circular groove in bottom for disposing one end of a spring means, a pair of first transverse screw holes spacedly formed in the body of said first half and lo a first rectangular groove in an inner surface of rear end thereof; said second half having a circular through hole adjacent front end made in registry with the tubular projection of said first half, a pair second transverse screw holes spacedly formed in the body made engageable with the first transverse screw holes and a second rectangular groove formed in an inner surface abutting rear end thereof made in registry with the first rectangular groove of said first heft; a positioning member having a circular body engaged into the tubular projection of said first half, a protrudent surface on to front side engaged in the circular through hole of said second half, an annular flange on back side, a large tenon and a small tenon symmetrically from on opposing outer peripheries abutting said annular flange, wherein said large tenon is slidably engaged into the axial slot of said tubular projection and a second circular groove in bottom for disposing other end of said spring means; a head member rotatably gripped by said first and second halves and having a blade on front end and an annular ring on rear end sleeved onto the tubular projection of said first half Wi th said positioning member engaged therein; said annular ring having an inner flange in which is two pairs of mortises symmetrically formed forengaging the large and the small tenons of said positioning member respectively; said annular ring having a slit, said slit is for inserting lo a positioning ring of a blade rack, said positioning ring sleeve on said tubular projection, said blade rack having a surface and a rod, a plurality of grooves are disposed on the top of said blade rack, said plurality of grooves are in corresponding with a plurality of protrudent pieces disposed inside a blade groove of said head, said first half and second half having a space for storing a tool box, said space having at least one rail on its surface, a protrudent rod disposed on each side of said tool box is inserted into said rail, thus said tool box cab slide on said rail and an elastic small box is inserted into so said tool box, with one end of said small box can be slantingly pointing upwards because of elasticity, said small box is for storing said blade, said protrudent rod is hollow; whereby press said positioning member inward to enable said head to rotate a certain degree of angle relative to said straight handle, said blade rack can be rotatably inserted into said blade groove of said head, thus can rotate said blade rack outwards for changing of said blade, when pulling said tool box I outwards, said small box is slantingly pointing upwards for convenience of getting blades.

2. The artistic knife as recited in claim 1 wherein said first half combines to said second half is by a pair of screws through said first and second transverse screw holes respectively.

3. The artistic knife as recited in claim 1 wherein said lo mortise can be increased in number to facilitate the user to make more different angles between said head and said straight handle.

4. The artistic knife as recited in claim 1 wherein said first rectangular groove and said second rectangular groove are combined into a rectangular cavity in rear end of said straight handle for engaging a shank of a screwdriver.

5. As claimed in Claim 1, said blade rack having its two bottom sides as a protrudent board, a plurality of convex lines are disposed on each side of said protrudent boards, said JO protrudent boards and said convex lines are for convenience of pulling said blade rack outwards fro said head.

6. As claimed in Claim 1, said surface of said rack blade I having ahole, a magnet is inserted into said hole for attracting said blade. ; 7. As claimed in Claim 1, each side of said tool box having a block for inserting into said rail of said straight handle for positioning said tool box.

8. As claimed in Claim 1, a rod go through said protrudent rods of said tool box to connect said small box, a spring is disposed under the bottom of said small box, and is sleeved on a protrudent block of said tool box, one end of said small box is a slant surface for convenience of inserting into said space said straight handle.

9. As claimed in Claim 1, one end of said tool box is a handle lo for fingers to grip on.

10. As claimed in Claim 1, a protrudent stopping block is disposed inside said blade groove of said head for pressing against said blade.

11. A knife constructed and arranged to function substantially as hereinbefore described with reference to and as shown in the accompanying drawings.

Claims

Amendments to the claims have been filed as follows CLAIMS: 1. A knife

having a handle comprising a first half and a second half; the first half and the second half each including a body and the first half having a tubular projection extending inwardly from an inner surface adjacent the front end thereof, the tubular projection including an axial slot in a peripheral wall thereof and a circular groove in the bottom thereof for receiving one end of a spring, a spaced pair of first transverse screw holes formed in the body of lo said first half and a first rectangular groove in an inner surface adjacent the rear end thereof; said second half having a circular through hole adjacent the front end thereof for registry with the tubular projection of said first half, a spaced pair of second transverse screw holes formed in the body of the second half for registry with the first transverse screw holes and a second rectangular groove formed in an inner surface adjacent the rear end thereof for registry with the first rectangular groove of the first half of the handle; a positioning member having a circular body engaged with the go tubular projection of the first half of the handle, a projecting surface on the front side of the positioning member engaged in the circular through hole of the second half of the handle, an annular flange on the rear of the positioning member, tenons extending symmetrically from opposing outer peripheries of the positioning member adjacent the annular flange, with one of the tenons slidably , t 6 12 C t f r 4 d < C < I r I < ( s engaged in the axial slot of the tubular projection and a second circular groove in the bottom of the positioning member for receiving the other end of the spring; a head member located by the first and second halves of the handle, the head member having a mounting for a blade on its front end and an annular ring on its rear end, the head member being mounted on the tubular projection of the first half of the handle, and the annular ring having an inner flange in which there are symmetrically arranged mortises for receiving the tenons of the JO positioning member; the annular ring having a slit for the reception of a positioning ring of a blade rack, said positioning ring also being mounted on the tubular projection of the first half of the handle, the top of the blade rack being formed with a plurality of grooves that are arranged to register with a plurality of projecting pieces disposed inside a blade groove of the head member, the first and second halves of the handle each having a space for storing a tool box, the space containing at least one rail, and the tool box having a projecting rod arranged to engage the rail in such JO manner that the tool box can slide on said rail, and a resiliently mounted small box for storing a blade contained within the tool box; and the arrangement being such that pressing the positioning member inwardly enables the user to rotate the head member relative to the handle, and also enables the blade rack to be rotated outwardly for . . ... . . À < À e À < e I À À e À À À e i À C

-I -

changing the blade, the arrangement further being such that when the tool box is pulled outwardly, the free end of the small box is inclined upwardly.
2. A knife as claimed in claim 1, in which the first and second halves of the handle are secured together by a pair of screws that pass through the first and second transverse screw holes respectively.

JO
3. A knife as claimed in claim 1, wherein said first rectangular groove and said second rectangular groove together form a rectangular cavity at the rear end of the handle for receiving a shank of a screwdriver.

Is
4. A knife as claimed in Claim 1, in which a board projects from the bottom of the blade rack and a plurality of convex lines are formed on the board.
5. A knife as claimed in Claim 1, in which the blade rack has a hole, and a magnet is contained in the hole.

6. A knife as claimed in Claim 1, in which each side of the tool box has a projecting block for engagement with the rail of the handle for positioning the tool box.
6 1 1 1 1 14 < 6 1 C e 1 4 1 1 C I i 6 [ i I 1 6 d 6 6 4 6 6 6 4 1 1 6 6 i 1 1 6 6 1
7. A knife as claimed in Claim 6, in which a rod passes through the projecting blocks of the tool box and provides a pivot mounting for the small box, a spring being disposed under the bottom of the small box. s
8. A knife as claimed in any one of the preceding claims, in which one end of the tool box is in the form of a handle for the user's fingers to grip on.

JO
9. A knife as claimed in any one of the preceding claims, in which a projecting stop member is disposed inside the blade groove of the head member and presses against the blade.
10. A knife constructed and arranged for use substantially as Is hereinbefore described with reference to and as shown in the accompanying drawings.

4 1 4 4 L 4 4 1 5 4 < 4 1 4 4 4 4 4 < 4 4 4 4 6 4 t I I t C I 1 4 4