U.S. patent application number 11/413085 was filed with the patent office on 2007-11-01 for adjustable punching device.
This patent application is currently assigned to Cheng Tien Int'l Corp.. Invention is credited to Hung-Chou Lu, Chao-Tung Shih.
Application Number | 20070251438 11/413085 |
Document ID | / |
Family ID | 38647124 |
Filed Date | 2007-11-01 |
United States Patent
Application |
20070251438 |
Kind Code |
A1 |
Shih; Chao-Tung ; et
al. |
November 1, 2007 |
Adjustable punching device
Abstract
An adjustable punching device includes a base having a first
through hole, a second through hole, a third through hole and a
fourth through hole with predetermined separation, a first clamping
section and a second clamping section adjacent to the third through
hole and the fourth through hole. A fixed knife rack is arranged on
each side of the base. The knife for each knife rack is
corresponding to the first through hole and the second through
hole. A lateral panel is arranged on outer side of the fixed knife
rack. A pressing plate is pivotally connected between the lateral
panels. A movable knife stage is arranged between two fixed knife
racks. The movable knife stage is limited between the first
clamping sections and on the second clamping sections. The movable
knife rack is corresponding to the third through hole and the
fourth through hole. After the hole separation has been adjusted,
the pressing plate is pressed to punch holes with fixed
separation.
Inventors: |
Shih; Chao-Tung; (Jhonghe
City, TW) ; Lu; Hung-Chou; (Jhonghe City,
TW) |
Correspondence
Address: |
HDSL
4331 STEVENS BATTLE LANE
FAIRFAX
VA
22033
US
|
Assignee: |
Cheng Tien Int'l Corp.
|
Family ID: |
38647124 |
Appl. No.: |
11/413085 |
Filed: |
April 28, 2006 |
Current U.S.
Class: |
112/68 |
Current CPC
Class: |
B26F 1/36 20130101; B26D
7/2628 20130101 |
Class at
Publication: |
112/068 |
International
Class: |
D05B 3/00 20060101
D05B003/00 |
Claims
1. An adjustable punching device, comprising: a base comprising a
first through hole and a second through hole on both sides thereof,
and a third through hole and a fourth through hole between the
first through hole and the second through hole and having different
separation, two first clamping sections and two second clamping
sections being arranged beside the third through hole and the
fourth through hole, two fixed knife racks being arranged on two
side of the base, wherein the two fixed knife racks being
corresponding to the first through hole and the second through
hole, a lateral panel being arranged outside of each of the fixed
knife racks; a movable knife stage pivotally connected to the base
and placed between the two fixed knife racks, one side of the
movable knife stage being in contact with the one of the first
clamping section, a clamping hole on a bottom of the movable knife
stage being clamped to one of the second clamping section, the
movable knife stage being corresponding to the third through hole
or the fourth through hole after the movable knife stage being
clamped to the first clamping section and the second clamping
section; and a pressing plate pivotally connected between the two
lateral panels and placed atop the two fixed knife racks and the
movable knife stage.
2. The adjustable punching device as in claim 1, wherein each of
the two fixed knife racks comprises a knife corresponding to the
first and second through hole, a spring element being provided for
the knife.
3. The adjustable punching device as in claim 1, wherein a lower
cover is provided below the base and comprises an adjustable
positioning rod.
4. The adjustable punching device as in claim 1, wherein the first
clamping section is a block baffling any side of the movable knife
stage.
5. The adjustable punching device as in claim 1, wherein the second
clamping section is a projection positioning at bottom of the
movable knife stage.
6. The adjustable punching device as in claim 1, wherein each of
the two lateral panels comprises a coupling hole.
7. The adjustable punching device as in claim 1, wherein the
movable knife stage comprises a knife and a spring element is
provided for the knife.
8. The adjustable punching device as in claim 1, wherein the
pressing plate comprises holes on both sides and corresponding to
the coupling hole, a pivotal unit passes the holes such that the
pressing plate is pivotally connected to the lateral panels.
9. The adjustable punching device as in claim 1, wherein the
pressing plate comprises a pressing section for pressing against
top of the knifes, where the pressing section has one convex face
and a concave face.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a punching device,
especially to an adjustable punching device.
[0003] 2. Description of Prior Art
[0004] The prior art punching device generally includes a base, two
through holes defined on the base, two knife stages arranged on the
base and corresponding to the through holes, and a pressing plate
pivotally arranged on the base and corresponding to the knifes.
When the pressing plate is pushed down to press on the top of the
knife, the knife is also pushed downward on the through holes.
Therefore, two holes can be made with predetermined separation on
paper.
[0005] The above-mentioned punching device can punch two holes with
predetermined separation on paper. However, when user wants to
punch additional two or three holes, the third hole might have
different separation with the other two holes. It is not suitable
for practical use. The user is forced to buy a punching device for
three holes. It is not convenient for user.
SUMMARY OF THE INVENTION
[0006] The present invention is intended to provide a punching
device with new design, which allows user to punch holes with equal
separation after the hole separation is set.
[0007] Accordingly, the present invention provides an adjustable
punching device, which includes a base having a first through hole,
a second through hole, a third through hole and a fourth through
hole with predetermined separation, a first clamping section and a
second clamping section adjacent to the third through hole and the
fourth through hole. A fixed knife rack is arranged on each side of
the base. The knife for each knife rack is corresponding to the
first through hole and the second through hole. A lateral panel is
arranged on outer side of the fixed knife rack. A pressing plate is
pivotally connected between the lateral panels. A movable knife
stage is arranged between two fixed knife racks. The movable knife
stage is limited between the first clamping sections and on the
second clamping sections. The movable knife rack is corresponding
to the third through hole and the fourth through hole. After the
hole separation has been adjusted, the pressing plate is pressed to
punch holes with fixed separation.
BRIEF DESCRIPTION OF DRAWING
[0008] The features of the invention believed to be novel are set
forth with particularity in the appended claims. The invention
itself however may be best understood by reference to the following
detailed description of the invention, which describes certain
exemplary embodiments of the invention, taken in conjunction with
the accompanying drawings in which:
[0009] FIG. 1 shows an exploded view of the present invention.
[0010] FIG. 2 shows a perspective view of the present
invention.
[0011] FIG. 3 shows a top view of the present invention.
[0012] FIG. 4 is a view showing the adjustment of the movable knife
stage according to the present invention.
[0013] FIG. 5 is another view showing the adjustment of the movable
knife stage according to the present invention.
[0014] FIG. 6 is still another view showing the adjustment of the
movable knife stage according to the present invention.
[0015] FIG. 7 is still another view showing the adjustment of the
movable knife stage according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0016] With reference to FIGS. 1 and 2, the present invention
provides an adjustable punching device, which includes a base 1, a
movable knife stage 2 and a pressing plate 3.
[0017] The stage 1 includes a first through hole 11 and a second
through hole 12 on both sides thereof. A third through hole 13 and
a fourth through hole 14 with predetermined separation are provided
between the first through hole 11 and the second through hole 12.
First camping section 15, 15a and second camping sections 16, 16a
are provided beside the third through hole 13 and the fourth
through hole 14. The first camping section 15, 15a are blocks to
limit the movement of the knife stage 2, and the second camping
sections 16, 16a are projections to clamp the knife stage 2. Two
fixed knife racks 17, 17a are arranged on both sides of the base 1
and each of the fixed knife racks 17, 17a is provided with a spring
element 171, 171a. The spring elements 171, 171a are capped on the
knifes 172, 172a corresponding to the first through hole 11 and the
second through hole 12. Lateral panels 18, 18a are provided outside
the fixed knife racks 17, 17a and include coupling holes 181, 181a
for pivotally connecting to the pressing plate 3. A lower cover 19
is provided below the base 1 and includes an adjustable positioning
rod 191.
[0018] The movable knife stage 2 is arranged between the fixed
knife racks 17, 17a and is fixed to the base 1 by screwing a screw
unit 21 with a nut 22 and a tab 23, where the screw unit 21 passes
a pivotal hole 20. A knife 25 with a spring element 24 is provided
in the movable knife stage 2. Clamping holes 26 corresponding to
the second camping sections 16, 16a are defined on bottom of the
movable knife stage 2. After the position of the movable knife
stage 2 is adjusted, the clamping holes 26 can be posited
corresponding to the second camping sections 16, 16a and the knife
25 is corresponding to the third through hole 13 or the fourth
through hole 14.
[0019] The pressing plate 3 includes holes 31, 31a corresponding to
the coupling holes 181, 181a of the lateral panels 18, 18a. A
pivotal unit 32 passes the holes 31, 31a such that the pressing
plate 3 is pivotally connected to the lateral panels 18, 18a. The
pressing plate 3 includes a pressing section 33 for pressing
against top of the knifes 172, 172a, 25, where the pressing section
33 has one convex face and a concave face.
[0020] With reference to FIGS. 3, 4 and 5, the operation of
punching three holes by the adjustable punching device of the
present invention is demonstrated. The movable knife stage 2 is
moved toward one side. After the movable knife stage 2 is blocked
by the first camping section 15, the clamping hole 26 of the
movable knife stage 2 is clamped to the second camping section 16.
Therefore, the knife 25 of the movable knife stage 2 is
corresponding to the third through hole 13. At this time, user
places paper 5 in the gap 4 between the base 1 and the two fixed
knife racks 17, 17a and the movable knife stage 2 and the presses
the pressing plate 3. The pressing section 33 is placed atop the
knifes 172, 172a and 25 and then the knifes 172, 172a and 25 are
pressed downward to punch three holes with equal separation on the
paper 5.
[0021] FIGS. 6 and 7 show the adjustable punching device according
to another preferred embodiment of the present invention, where the
adjustable punching device is used to punch additional two holes
with equal separation. The adjustable positioning rod 191 is moved
to a position with reference to size of the paper 5 and then the
movable knife stage 2 is moved to another side. The movable knife
stage 2 is then stopped by the first camping section 15a. The
clamping hole 26 of the movable knife stage 2 is clamped to the
second clamping section 16a such that the knife 25 of the movable
knife stage 2 is corresponding to the fourth through hole 14. At
this time, user places the paper 5 in the gap 4 between the base 1
and the two fixed knife racks 17, 17a and the movable knife stage 2
and the presses the pressing plate 3. The pressing section 33 is
placed atop the knifes 172, 172a and 25 and then the knifes 172,
172a and 25 are pressed downward to punch two holes with equal
separation on the paper 5.
[0022] More particularly, the movable knife stage 2 according to
the present invention can be applied to any punching device for
punching more than two holes, whereby user can punch multiple holes
with equal separation.
[0023] Although the present invention has been described with
reference to the preferred embodiment thereof, it will be
understood that the invention is not limited to the details
thereof. Various substitutions and modifications have suggested in
the foregoing description, and other will occur to those of
ordinary skill in the art. Therefore, all such substitutions and
modifications are intended to be embraced within the scope of the
invention as defined in the appended claims.
* * * * *