U.S. patent application number 11/413098 was filed with the patent office on 2007-11-01 for impact protection for nail driver.
This patent application is currently assigned to De Poan Pneumatic Corp.. Invention is credited to Wan-Fu Wen.
Application Number | 20070251966 11/413098 |
Document ID | / |
Family ID | 38647396 |
Filed Date | 2007-11-01 |
United States Patent
Application |
20070251966 |
Kind Code |
A1 |
Wen; Wan-Fu |
November 1, 2007 |
Impact protection for nail driver
Abstract
A nail driver includes a securing slide rod, a knocking rod, a
sleeve and an absorber. The securing slide rod has one end able to
push on an inner trigger for actuating the nail driver by a trigger
and the other end formed a receiving portion. The knocking rod has
one end formed a bolt and the other end able to protrude outside
the nail driver to press against a workpiece. The sleeve is
connected between the securing slide rod and the knocking rod by
screwing the bolt therein and being rotatably and movably received
in the receiving portion. The absorber is mounted on an exterior
surface of the sleeve to absorb impact passing from the knocking
rod to the securing slide rod. As such, the securing slide rod and
the knocking rod can be protected when the nail driver is
accidentally dropped.
Inventors: |
Wen; Wan-Fu; (Taipei Hsien,
TW) |
Correspondence
Address: |
Wen-Chin Hu
4331 Stevens Battle Lane
Fairfax
VA
22033
US
|
Assignee: |
De Poan Pneumatic Corp.
|
Family ID: |
38647396 |
Appl. No.: |
11/413098 |
Filed: |
April 28, 2006 |
Current U.S.
Class: |
227/8 |
Current CPC
Class: |
B25C 1/008 20130101 |
Class at
Publication: |
227/008 |
International
Class: |
B21J 15/28 20060101
B21J015/28 |
Claims
1. A nail driver comprising: a securing slide rod with one end able
to reach an inner trigger for activation of the nail driver by a
trigger and another end forming a receiving portion wherein the
receiving portion includes an upper and a lower supporting plates;
a knocking rod with one end forming a bolt and another end
protruding out of the nail driver to press against a workpiece for
lifting the securing slide rod to push on the inner trigger; a
sleeve connected between the securing slide rod and the knocking
rod by screwing the bolt therein from a distal end thereof and
being rotatably and movably received in the receiving portion,
wherein the sleeve includes a head to rest on the upper supporting
plate and a cylindrical body to penetrate the upper and the lower
supporting plates with the distal end protruding from the lower
supporting plate; and an absorber mounted on an exterior surface of
the distal end of the sleeve to absorb impact passing from the
knocking rod to the securing slide rod.
2. (canceled)
3. (canceled)
4. The nail driver as claimed in claim 1, further comprising a
rubber bushing installed between the upper and the lower supporting
plates.
5. The nail driver as claimed in claim 1, further comprising a
washer mounted on the distal portion beneath the absorber.
6. The nail driver as claimed in claim 5, further comprising a
C-ring to secure the absorber and the washer mounted on the
cylindrical body.
7. The nail driver as claimed in claim 1, wherein the absorber is a
rubber bushing or a compressible spring.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to an impact protection device
for a nail driver, more particularly to an impact absorber mounted
on a nail-punching-depth adjusting sleeve connected between a
securing slide rod and a knocking rod to absorb impact passing from
the knocking rod to the securing slide rod when the nail driver is
accidentally dropped.
[0002] A securing slide rod and a knocking rod are interconnected
in a nail driver. The securing slide rod provides an end capable of
reaching an inner trigger of the nail driver and the knocking rod
provides an end protruding out of the nail driver and close to the
opening of the punching channel to contact a workpiece. Therefore,
the securing slide rod can push on the inner trigger to release the
trigger for activation of the nail driver when the knocking rod
presses against on the surface of the workpiece.
[0003] Furthermore, mostly a sleeve for adjusting the nail punching
depth is used to connect with the securing slide rod or the
knocking rod or therebetween. The sleeve can adjust a protruding
length of the knocking rod to control the punching depth of nail.
Especially for the thinner workpiece, usually the sleeve has to be
adjusted to make the nail expose its head standing out of the
workpiece to ensure the fastness.
[0004] However, if the nail driver is accidentally dropped to have
the knocking rod hit on the ground. The impact may cause the
knocking rod or the securing slide rod bended or even broken.
[0005] A conventional way to solve the problem is using larger
sized knocking rod or securing slide to enhance the strength.
However, the impact still exists and will distribute to other
components of the nail driver to cause damage.
[0006] Others, a spring is provided between the securing slide rod
and nail driver body to push back the knocking rod or provided to
the sleeve for resilient adjustment. However, the spring still can
not absorb the impact.
BRIEF SUMMARY OF THE INVENTION
[0007] The present invention is to provide an impact protection
device for a nail driver so that the securing slide rod and the
knocking rod and the nail driver can be protected when the nail
driver is accidentally dropped.
[0008] Accordingly, the nail driver of the present invention
includes a nail-punching-depth adjusting sleeve connected between a
securing slide rod and a knocking rod. At least one absorber is
mounted on an exterior surface of the sleeve. The securing slide
rod has one end able to reach an inner trigger for activation of
the nail driver by a trigger and the other end formed a receiving
portion. The knocking rod has one end formed a bolt and the other
end protruding out of the nail driver to press against a workpiece
for lifting the securing slide rod to push on the inner trigger.
The sleeve is rotatably and moveably received in the receiving
portion and the bolt is screwed therein to interconnect the
securing slide rod and the knocking rod.
[0009] Furthermore, the absorber can be a rubber bushing or a
compressible spring to absorb impact passing from the knocking rod
to the securing slide rod.
[0010] Various objects and advantages of the present invention will
be more readily understood from the following detailed description
when read in conjunction with the appended drawing.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 shows a nail driver of the present invention.
[0012] FIG. 2 shows an enlarged local view of an absorber installed
on a sleeve connected between a securing slide rod and a knocking
rod of a nail driver.
[0013] FIG. 3 shows an enlarged local view of a protruding length
of a knocking rod to be adjusted by a sleeve of a nail driver for a
thinner workpiece.
[0014] FIG. 4 shows an enlarged local view of a knocking rod
pressing against a workpiece to have a securing slide rod push on
an inner trigger for releasing a trigger of a nail driver.
[0015] FIG. 5 shows an enlarged local view of a nail driver being
triggered to shoot a nail on a workpiece with its head portion
standing out of the workpiece.
[0016] FIG. 6 shows an enlarged local view of a rubber bushing as
an absorber to prevent impact induced by a knocking rod of a nail
driver hitting to a ground.
[0017] FIG. 7 shows an enlarged local view of a spring as an
absorber to prevent impact induced by a knocking rod of a nail
driver hitting to a ground.
DETAILED DESCRIPTION OF THE INVENTION
[0018] In order that those skilled in the art can further
understand the present invention, a description will be described
in the following in details. However, these descriptions and the
appended drawings are only used to cause those skilled in the art
to understand the objects, features, and characteristics of the
present invention, but not to be used to confine the scope and
spirit of the present invention defined in the appended claims.
[0019] Referring to FIGS. 1 and 2, a pneumatic nail driver 1 of the
present invention includes a securing slide rod 3, a knocking rod
4, a nail-punching-depth adjusting sleeve 5 and an impact absorber
6.
[0020] The securing slide rod 3 has one end 30 capable of reaching
an inner trigger 21 for the activation of the nail driver 1 by a
trigger 2 and the other end 31 formed a receiving portion 310.
[0021] The knocking rod 4 has one end integrally or coordinately
formed a bolt 41 as the connecting portion and the other end as a
contact end 42 protruding out of the nail driver 1 and close to the
opening 101 of a punching channel 10.
[0022] The sleeve 5 is connected between the securing slide rod 3
and the knocking rod 4 by screwing the bolt 41 therein and being
rotatably and movably received in the receiving portion 310 of the
securing slide rod 3.
[0023] The absorber 6, which can be made of flexible material like
rubber or spring, is mounted on an exterior surface of the sleeve 5
to absorb impact passing from the knocking rod 4 to the securing
slide rod 3.
[0024] As such, the securing slide rod 3 can push on the inner
trigger 21 to rotate a swing component 22 for releasing the trigger
2 and the nail driver 1 can be triggered by the trigger 2 to push a
lever 231 of a trigger valve 23 so that high-pressure air will
drive a punch rod 11 in the punching channel 10 to shoot nail 12
when the knocking rod 4 is presses against on the surface of a
workpiece to lift up the securing slide rod 3.
[0025] The receiving portion 310 includes two parallel supporting
plates 311 and 312 for the sleeve 5 securely and stably received in
the receiving portion 310. A rubber bushing 32 is installed on the
sleeve 5 between these two supporting plates 311 and 312 to enhance
the strength thereof against the impact.
[0026] A nut 43 is used to screw on the threaded end of the bolt 41
to fix the position of sleeve 5 after the punching depth of the
nail is determined.
[0027] The sleeve 5 includes a head 52 to rest on the upper
supporting plate 311 and a cylindrical body 51 to penetrate two
supporting plates 311 and 312 with a distal portion protruding from
the lower supporting plate 311 wearing the absorber 6.
[0028] The head 52 of the sleeve 5 has a cavity 53 for receiving
the nut 43 and a compressible spring 54 to press against the sleeve
5. Therefore, the knocking rod 4 can go back to its normal position
after the contact end 42 does not press against the workpiece. The
existing of the spring 54 can also provide stable operation for
rotating the head 52 of the sleeve 5 to adjust the punching depth
of the nail.
[0029] A washer 7 is further mounted on the distal portion of the
cylindrical body 51 right beneath the absorber 6 to disperse the
interaction caused between the bolt 41 and the absorber 6 and a
C-ring 8 is then used to secure the absorber 6 and the washer 7
mounted on the cylindrical body 51 of the sleeve 5.
[0030] Accordingly, when the nail driver 1 is used to fasten a
thinner workpiece 9, as shown in FIG. 3, a user can rotate the
sleeve 5 through the head 52 so that the bolt 41 screwed in the
sleeve 5 can move forward or backward to obtain a proper protruding
length of the knocking rod 4 out of the nail driver 1. In is case,
a vertical distance H measured from the opening 101 of the punch
channel 10 to the contact end 42 of the knocking rod 4 should be
larger than a lifting height h of the securing slide rod 3. Such
that, as shown in FIG. 4, after the knocking rod 4 presses against
the workpiece 9, due to the force exerted on the knocking rod 4 is
still within an endurance of the absorber 6, that is, the force can
not deform or only slightly deform the absorber 6, thus the sleeve
5 does not move with respect to the receiving portion 310 of the
securing rod 3 and the securing rod 3 is lifted up with the
distance h to push on the inner trigger 21 to rotate the swing
component 22 for releasing the trigger 2. Moreover, the contact end
42 of the knocking rod 4 still remains a vertical distance h'
measuring from the opening 101 equal to or larger than a size S of
the nail 12. Therefore, the nail driver 1 can be triggered by the
trigger 2 to push the lever 231 of the trigger valve 23 and the
high-pressure air drives the punch rod 11 in the punching channel
10 shooting the nail 12 to the workpiece 9 and have the nail head
121 of the nail 12 stand out of the surface of the workpiece 9 to
enhance the fastness of nail 12 on the workpiece 9, as shown in
FIG. 5.
[0031] As shown in FIG. 3, if the nail driver 1 is accidentally
dropped to have contact end 42 of the knocking rod 4 hit on the
ground 90, the knocking rod 4 will be pushed to have the contact
end 42 leveled to the opening 101, as shown in FIGS. 6 or 7. Due to
the impact will make the absorber 6 deformed, that is, the absorber
6 will absorb the impact, the sleeve 5 will move up with respect to
the receiving portion 310 of the securing slide rod 3 and the
securing slide rod 3 will substantially remain unmoved. As in FIGS.
6 or 7, a rubber bushing 6 or a spring 60 is used to absorb the
impact by the compressibility. Moreover, the washer 7 can uniformly
distribute the impact to the rubber bushing 6 or spring 60 for
better absorption. Therefore, the securing slide rod 3 and the
knocking rod 4 can be protected from the impact to prolong the
lifetime.
[0032] The present invention is thus described. It will be obvious
that the same may be varied in many ways. Such variations are not
to be regarded as a departure from the spirit and scope of the
present invention, and all such modifications as would be obvious
to one skilled in the art are intended to be included within the
scope of the following claims.
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