Information
-
Patent Grant
-
6807738
-
Patent Number
6,807,738
-
Date Filed
Friday, October 4, 200222 years ago
-
Date Issued
Tuesday, October 26, 200419 years ago
-
CPC
-
US Classifications
Field of Search
US
- 074 543
- 016 1111
- 016 436
- 016 DIG 12
- 030 321
- 030 329
- 030 330
- 030 335
- 030 337
- 030 339
- 081 177
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International Classifications
-
Abstract
A blade gripping mechanism in a heavy duty artistic knife includes a straight handle combined with a first and a second halves and secured by a pair of screws. The straight handle has a tubular projection in front end for elastically disposing a positioning member which has a pair of tenons symmetrically formed on opposing outer peripheries and a rectangular receiving space in rear end for releasably disposing a tool box therein. A head has a first annular ring on rear end sleeved on the tubular projection including two pairs of mortises in an inner flange made engageable with the tenons and an annular gap in communication with a flat gap in the body. A blade rack having a second annular co-axially sleeved on the tubular projection together with the first annular ring and a blade disposing space in side of a flat upright for placing a blade therein. When changing a new blade, press the blade rack downward to have it rotating out of the flat gap and then push it in again after the changing of the blade. The process is therefore simple and convenient.
Description
BACKGROUND OF THE INVENTION
The present invention relates to heavy duty artistic knives and more particularly to a blade gripping mechanism in a heavy duty artistic knife.
The blade for heavy duty artistic knife is usually in trapezoid shape which has two triangular edges can reciprocate with each other. Due to the strong force has to be applied on the knife everytime when it cuts a work piece, the edges of the blade are very easily to become obtuse and have to be changed very often. Therefore, improvement has to be made to ensure that the changing of the blade should be very rapid and the gripping of the blade should be very stable. The heavy duty artistic knives available in the market are usually adopted a button to grip the blade. The button can slide the blade to and fro in the handle. Due to the poor gripping force, the blade is always loosened. Besides, each time to change the blade, the handle has to be wholly disassembled, causing great inconvenience.
SUMMARY OF THE PRESENT INVENTION
The present invention has a main object to provide a blade gripping mechanism in a heavy duty artistic knife which mechanism has a rotatable blade rack to be opened easily to facilitate the user to rapidly change or fixedly place the blade.
Another object of the present invention is to provide a blade gripping mechanism in a heavy duty artistic knife in which a tool box is provided to store spare blades or other small tools.
Accordingly, the blade gripping mechanism in a heavy duty artistic knife of the present invention comprises generally a straight handle which is combined with a first and a second halves and secured by screws and has a tubular projection in front end and a rectangular receiving space in rear end, a head which has an annular ring on rear end rotatably sleeved on the tubular projection, an annular gap in the annular ring communicating to a flat gap in the body for receiving a roughly T-shaped blade rack which has a flat bottom, a flat upright engaged within the flat gap of the head and a positioning ring engaged with the annular gap of the annular ring so that the positioning ring is sleeved on the tubular projection together with the annular ring, a blade is placed in a blade disposing space in on side of the upright of the blade rack and stool box releasably disposed into the rectangular receiving space in the rear end of the straight handle for storing spare blades and/or other small toll. When rotates the blade rack downward, it is opened to facilitate a rapid changing of the blade taking from the stool box that is very convenient.
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
FIG. 1
is an exploded perspective view to show the preferred embodiment of the present invention,
FIG. 2
is a top sectional view to show the assembly of the present invention,
FIG. 3
is a side view with partially sectional view of
FIG. 2
,
FIG. 4
is a perspective view of
FIG. 2
while the artistic knife of the present invention is in operation,
FIG. 5
is a sectional view to show the structure of the head,
FIG. 6
is a sectional view to show that the blade rack is opened to change the blade, and
FIG. 7
is a sectional of the tool box which is drawn apart from the straight handle.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference to
FIGS. 1
,
2
and
3
, of the drawings, the blade gripping mechanism in a heavy duty artistic knife of the present invention comprises a straight handle
1
, a head
30
and a tool box
50
.
The straight handle
1
is combined with a first half
10
and a second half
20
has a tubular projection
11
in front end, a pair of screw hole spacedly formed in the body, a rectangular space
16
in the inner side abutting rear end including a grooved guide
161
extended along the length thereof and a positioning member
40
elastically disposed into the tubular projection
11
having a large tenon
43
and a small tenon
44
symmetrically formed on opposing outer peripheries. The second half
20
has a circular through hole
21
adjacent front end, a pair of screw holes
22
and
23
spacedly formed in the body made in registry with the screw holes
13
and
14
of the first half
10
and a rectangular space
27
formed in the inner side abutting rear end including a grooved guide
271
extended along the length thereof which is made in registry with the rectangular space
16
and the grooved guide
161
of the first half
10
and a pair of screws
24
and
25
secure the first half
10
and the second half
20
together through the screw holes
13
,
22
and
14
,
23
. Once the first and second halves
10
and
20
are combined, the positioning member
40
is engaged with the circular through hole
21
and the rectangular spaces
16
and
27
are formed a large rectangular receiving space to receive the tool box
50
therein (as shown in FIGS.
2
and
3
).
The head
30
has an annular ring
32
on rear end sleeved on the tubular projection
11
of the first half
10
including two pairs of mortises
322
and
323
symmetrically formed in opposing inner peripheries made engageable with tenons
43
and
44
(this part was already described in another U.S. Patent application) and an annular gap
325
made in communication with a flat gap
33
in the body of the head
30
, a stop block
331
formed on one lateral side of the flat gap
33
and a pair of projections
301
spacedly formed on the top inner surface of the flat gap
33
(as shown in FIG.
5
). A roughly T-shaped bladed rack
34
disposes into the flat gap
33
of the head
30
. The blade rack
34
flat upright and a flat bottom, an annular ring
341
on the rear end engaged into the annular gap
325
so that the annular ring
341
is sleeved on the tubular projection
11
together with the annular ring
32
, a blade disposing space
342
formed in a lateral side of the flat upright including a large recess
345
for receiving a magnet
344
, a small recess
349
for receiving a pin
343
therein, a pair of slots
346
spacedly formed in a top of the flat upright made in registry with the projections
301
of the flat gap
33
, a sloped surface
347
on the rear end of the flat bottom and a striped surface
348
on a lateral edge of the flat bottom for the purpose of readily opening of the blade rack
34
by finger. A blade
31
disposes into the blade disposing space
342
and is attracted by the magnet
344
and squeezed by the stop black
331
and has a plurality of slots
311
in the top engaged with slots
346
of the blade rack
34
and the protrusions
301
of the head
30
respectively and a pair of through holes
312
engaged on the pin
343
.
The tool box
50
is in drawer shaped and has a bottom, two lateral walls, a front wall, an enlarged back wall or grip piece
57
which is larger than the front wall in order to cover the opening end of the large rectangular receiving space and to facilitate finger operating, a pair of tubular protrusions
51
and
52
and a pair of triangular blocks
56
symmetrically and spacedly formed on opposing outer surfaces of the lateral walls which are slidably engaged within the grooved guides
161
and
171
of the rectangular receiving space, a protrudent rod
54
centrally projected upward from the bottom of the tool box
50
adjacent front end thereof for disposing the lower end of a spring
55
(as shown in FIG.
3
), a hollow interior tool rack
58
for storing the spare blades
31
or other tools disposed into the tool box
50
and biased by the upper end of the spring
55
and has an oblique surface
581
on a top and a through hole
582
in front end made engageable with the tubular protrusions
51
and
52
of the tool box
50
and rotatably secured by an axial pin
53
. So that the tool rack
58
may be jumped up when the tool box
50
is drawn out of the rectangular receiving space. The oblique surface
581
is provided to facilitate the tool box
50
to readily insert into the rectangular receiving space.
When assembling, first dispose the blade rack
34
into the flat gap
33
of the head
30
with the annular ring
341
engaged into the annular gap
325
of the annular ring
32
, the sleeve the annular ring
32
together with the annular ring
341
onto the tubular projection
11
of the first half
10
and then combine the two halves
10
and
20
together by screws
24
and
25
, finally insert the tool rack
58
into the rectangular receiving space. So that the assembly of the heavy duty artistic knife of the present invention is therefore accomplished. Meanwhile, the tenons
43
and
44
will be automatically engaged with the respective mortises
322
and
323
. Further, the blade rack
34
can be individually rotated on the tubular projection
11
.
Referring to
FIGS. 4
,
5
and
6
, of the drawings, if attempt to change or replace a new blade
31
into the blade rack
34
, one can press the sloped surface
347
or the striped surface
348
downward to turn the blade rack
34
out of the flat gap
33
of the head
30
. Then place the new blade
31
into the blade disposing space
342
in the manner as described the above. When the blade rack
34
upward to frictionally engaged into the flat gap
33
, the protrusions
301
in the gap
33
will be automatically engaged with the slots
311
of the blade
31
to limit the lateral movement of the blade
31
. In operation, due to an reaction force comes from under edge of the blade
31
that helps the blade rack
34
to be more tight into the flat gap
33
without breaking off. If more gripping mechanism is provided in the flat gap
33
to grip the blade rack
34
, it should be within the scope of the present invention.
Referring to
FIG. 7
, when apply the grip piece
57
to draw the tool box
50
out of the rectangular receiving space, the free end of the tool rack
58
will be jumped up to facilitate a readily picking up a spare blade
31
or other tools from the tool rack
58
.
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 art without departing from the spirit or scope thereof as defined by the appended claims and their legal equivalents.
Claims
- 1. A blade gripping mechanism in a heavy duty artistic knife comprising:a straight handle combined with a first half and a second half by a pair of screws through two pair of screw holes respectively and spacedly formed in said halves, said halves each having a corresponding rectangular space including a grooved guide extended along the length thereof formed in an inner side abutting rear end to combine a large rectangular space therebetween therein said first half having a tubular projection on an inner side abutting front end thereof to elastically receiving a positioning member which has a pair of tenons symmetrically formed on opposing outer peripheries, said second half having a circular through hole abutting front end made engageable with side positioning member; a head having a first annular rotatably sleeved onto said tubular projection of said first half and having two pairs of mortises symmetrically and spacedly formed in an inner flange engageable with said tenons of said positioning member and an annular gap formed in said first annular ring communicating to a flat gap inside side head, a stop block on an inner wall of said flat gap and a pair of projections spacedly formed on an inner top of said flat gap; a T-shaped blade rack having a flat bottom, a flat upright engageable into said flat gap of said head, a second annular ring engaged into said annular gap of said first annular ring of said head so as to co-axially sleeved on said tubular projection of said first half together with said first annular ring, a blade disposing space formed in a lateral side of said flat upright facing said stop black of said flat gap and having a large recess and a small recess spacedly formed therein for respectively disposing a magnet and a pin, a pair of first slots spacedly formed in a top of said flat upright abutting front end thereof made engageable with said projections of said flat gap, and sloped surface on inner end of said flat bottom and a striped surface on a lateral edge of said flat bottom; a blade engaged into said blade disposing space of said blade rack and attracted by said magnet, said blade having a pair of through hole in the body engageable with said pin of said blade disposing space and a plurality of second slots spacedly formed in top engageable with said first slots of said flat upright and said projections of said flat gap respectively; a drawer shaped tool box releasably disposed into said rectangular receiving space of said straight handle, said tool box having a bottom, two lateral walls, a front wall and an enlarged back wall, a pair of tubular protrusions and a pair of triangular blocks symmetrically and spacedly formed on opposing outer surface of said lateral walls made slidably engaged into said grooved guides of said rectangular receiving space, a protrudent rod centrally projected upward from an inner surface of said bottom for disposing one end of a spring means, a blade rack for storing spare blades disposed into said tool box and biased by said spring mean, said blade rack having a hollow interior, an oblique surface on a top and through hole in front end made engaged with said tubular protrusions of said tool box and rotatably secured by an axial pin.
- 2. The blade gripping mechanism as recited in claim 1 wherein said blade rack is rotated individually on said tubular projection for facilitating changing of said blade.
- 3. The blade gripping mechanism as recited in claim 1 wherein said blade rack is jumped up when said tool box is drawn out of said rectangular receiving space for facilitating picking up a spare blade therefrom.
US Referenced Citations (9)