Buckles – buttons – clasps – etc. – Zipper or required component thereof – Slider having specific configuration – construction,...
Reexamination Certificate
2000-05-19
2001-12-25
Sandy, Robert J. (Department: 3626)
Buckles, buttons, clasps, etc.
Zipper or required component thereof
Slider having specific configuration, construction,...
C024S420000, C024S424000, C024S423000
Reexamination Certificate
active
06332249
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a slider with locking mechanism for use in ordinary slide fasteners, and more particularly to a slider for slide fastener with locking mechanism whose pawl body having locking pawl is actuated to operate the locking mechanism when a pull tab is raised or hung by using a repellent force of the fastener element, without use of any spring.
2. Description of the Related Art
A conventional example for a slider for slide fastener with locking mechanism of this kind is disclosed in Japanese Utility Model Publication No. 45-2165, as shown in
FIG. 15. A
cut-out is provided by cutting out the center of the surface of an upper wing plate
005
of a slider body
001
in a curved shape, and a pawl hole
013
is provided at a deviated position of the bottom portion of this cut-out. A leaf spring is disposed in the cut-out such that it moves freely and has a U-shaped protruding portion provided in the center thereof, which is capable of entering or escaping from the pawl hole
013
freely. An end of the leaf spring is fixed in a concave portion
011
provided at an end portion of the cut-out. Then, a cam
030
provided on a top portion of a pull tab
003
journalized by a post provided in the upper wing plate
005
is brought into contact from above. By raising or hanging the pull tab
003
, the U-shaped protruding portion of the leaf spring is made to protrude in between fastener elements on one side so as to lock the slider.
According to Japanese Patent Application Laid-Open No. 10-127312, a slider for slide fastener having locking mechanism as shown in
FIG. 16
has been disclosed. The slider comprises a slider body
101
, swing plate, cover
104
and pull tab
103
. A recess
111
is provided in a top surface of the upper wing plate
105
, a pawl hole
113
is formed on one side in the rear side of the recess
111
and a hook-shaped cover mounting post
118
is provided on front and back, a bearing projecting portion
114
is provided on both sides, the swing plate is formed of a sheet body curved in a gentle V shape, a step is provided for preventing a contact of the cam
130
on the rear surface thereof, and a circular head portion facing downward is provided on one end and a lock projecting portion
124
deviated to one side is provided on the other end. A cam
130
is provided integrally in the center of a pintle on one end of the pull tab
103
and an end of the cam
130
is deviated toward a front end with respect to the axis of the pintle of the pull tab
103
. Then, the swing plate is disposed within the recess
111
. The pintle of the pull tab
103
is placed on the bearing projecting portion
114
from above, so that the cam
130
is brought into contact with the rear surface of the swing plate and then, the cover
104
is mounted on the mounting posts
118
. A projecting piece provided on the cover
104
is brought into contact with the circular head portion of the swing plate. As a result, the swing plate is prevented from floating up freely to lose the locking function when the pull tab
103
is hung.
In the slider for slide fastener with locking mechanism shown in
FIG. 15
described above, when considering a contact point between the cam
011
of the pull tab
003
and leaf spring, there may be a problem that when the locking function is actuated by hanging the pull tab
003
, the pull tab
003
may jump up due to a force which pushes up the U-shaped protruding portion by engaging elements and a restoration force of the leaf spring i.e. a sliding backward thereof, which makes the locking function unstable. Further, because the protruding portion of the leaf spring is only curved in a U shape, it is easily deformed so that a secure locking function cannot be expected.
In the slider for slide fastener with locking mechanism shown in
FIG. 16
, when the swing plate is pressed by the cam
130
so that a lock projecting portion
124
formed on the swing plate is pressed into coil-shaped fastener elements, there is a large gap between the lock projecting portion
124
for receiving a repellent force from the fastener element and a contact portion between the cam
130
and swing plate. Therefore, the swing plate is twisted around the contact portion with the cam
130
by a repellent force of the fastener elements, so that it is deformed, thus the lock projecting portion
124
is unable to carry out a sufficient locking action for the fastener elements. Further, the lock projecting portion
124
of the swing plate is deviated to one side, so that the locking function is actuated by only the fastener elements on one side. As a result, the locking function cannot be exerted uniformly to the right and left sides.
SUMMARY OF THE INVENTION
The present invention has been achieved in views of the above described problems, and therefore, an object of the present invention is to provide a slider for slide fastener with locking mechanism in which a locking mechanism of the slider is different from a conventional slider such that the locking mechanism is actuated at right-angle to fastener element row by raising or hanging operation of a pull tab and has a rigid structure thereby ensuring a sufficient locking performance.
Another object of the present invention is to provide a slider for slide fastener with locking mechanism in which the locking mechanism is formed in a structure suitable for reduction of the size so that the slider itself can be reduced in size and allowing smooth operation thereof.
Still another object of the present invention is to provide a slider for slide fastener with locking mechanism in which by specifying a relation between the cam of the pull tab and pawl body in the locking mechanism, the locking mechanism is prevented from being released unintendedly, and once the locking mechanism is released, it is never activated unless an intended locking operation is carried out.
A further object of the present invention is to provide a slider for slide fastener with locking mechanism in which the locking mechanism is deviated to both the right and left with respect to the center of the slider so that they coincide with the right and left fastener element rows, thereby activating uniformly to the right and left sides to achieve an excellent locking function.
A further object of the present invention is to provide a slider for slide fastener with locking mechanism in which the locking mechanism is provided in the center of the slider so that it is activated equally to a coupling head side of any of the right and left fastener element rows, thereby achieving an excellent locking function.
Another object of the present invention is to provide a slider for slide fastener with locking mechanism in which by moving the pull tab forward or backward, the locking mechanism is activated smoothly at the forward and backward positions so that an excellent locking function can be exerted.
Still another object of the present invention is to provide a slider for slide fastener with locking mechanism in which components of the slider, that is, the slider body, pawl body, cover and pull tab are molded of the same material of thermoplastic resin or metal so as to be recycled.
An object of the present invention is to provide a slide fastener with a slider with locking mechanism in which the locking mechanism is activated effectively and appropriately, and the locking mechanism can be released easily by a repellent action of a deformation of the coil-shaped fastener elements.
To achieve these objects, there is provided a slider for slide fastener with locking mechanism, wherein a recess is provided in the surface of an upper wing plate of a slider body; pawl holes for locking pawls are made in a bottom portion of the recess; a pawl body having the locking pawls on a bottom thereof so as to protrude is mounted to the recess movable vertically so that the locking pawls are capable of entering or escaping from the slider body freely through the pawl holes; and a pull tab is supported by supporting pieces such
Oda Kiyoshi
Yamagishi Koji
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Sandy Robert J.
YKK Corporation
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