Buckles – buttons – clasps – etc. – Separable-fastener or required component thereof – Including member having distinct formations and mating...
Reexamination Certificate
2000-10-26
2002-03-19
Sakran, Victor N. (Department: 3626)
Buckles, buttons, clasps, etc.
Separable-fastener or required component thereof
Including member having distinct formations and mating...
C024S590100, C024S595100, C024S598700
Reexamination Certificate
active
06357090
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a latch to be used for fixing a cover of a knapsack, bag or the like to its main body. More particularly, it relates to a twist latch wherein a knob attached to the main body is inserted into a hole portion formed in the cover from a back side thereof and then the knob appearing from the surface is twisted around so as to be fixed to the hole portion.
2. Description of the Related Art
FIG. 21
shows a conventional twist latch, disclosed in Japanese Utility Model Publication No. 5-3651. According to this invention, a main body
4
′ is a rectangular box extended in its lateral direction whose bottom face is open. A square shaft-bearing portion
11
′ in which a shaft
27
′ of the knob
25
′ is to be inserted is provided in a center of the main body
4
′ and elastic pieces
52
′ are disposed at a bottom end of the shaft-bearing portion
11
′ so as to oppose each other. Then, a plate-like bottom portion
10
′ extended in a lateral direction is provided at a bottom end of the main body
4
′ and pair of leg portions
50
′,
50
′ are provided so as to protrude on the bottom face of the bottom portion
10
′. A saw-tooth like engaging step portion
50
a
′ is provided on an outer side face of each leg portion
50
′. The knob
25
′ has the protruding shaft
27
′in a center of the bottom face thereof so as to be inserted into the shaft-bearing portion
11
′. A plate
6
′ is provided with through holes
32
′ in which each of the leg portions
50
′,
50
′ is to be fitted from a back side of the main body
4
′ and a pawl
51
′ is provided so as to be protruded at each through hole
32
′ so that it is capable of fitting to the engaging step portion
50
a
′ of the leg portion
50
′. The leg portions
50
′,
50
′ of the main body
4
′ are inserted through a surface of a cloth and the plate
6
′ is press-fit onto the leg portions
50
′,
50
′ from a back side of the cloth so that it is fixed thereto.
FIG. 22
shows another twist latch, which is disclosed in Japanese Utility Model Publication No. 5-4530. According to this twist latch, a main body of a plug
1
″ has a shaft-bearing portion
11
″ protruded upward in a center of a base
10
″ of an ellipse shape, and an interior of the shaft-bearing portion
11
″ is formed such that its upper side is of small diameter while its lower side is of large diameter. A through hole
55
″ is formed on each of both the right and left sides of the base
10
″. A rivet
54
″ is inserted into each of the through holes
55
″, while a cloth is nipped by the main body and a rear plate
60
″ so that it is riveted. A knob body
5
″ has a shaft portion
27
″ provided in a center of a bottom of a rectangular knob
25
″, and the shaft portion
27
″ is divided into a cross shape so as to provide the shaft portion
27
″ with elasticity. An expanded portion
29
″ is provided at a tip of the shaft portion
27
″. When it is inserted into a large diameter portion
22
″ of the shaft-bearing portion
11
″, the shaft portion
27
″ is supported therein so as to be rotatable. Further, a corresponding socket
2
″ has rivets
53
″ protrudedly provided on both the right and left sides of the base
40
″ containing a rectangular through hole
56
″ through which the knob
25
″ of the knob body
5
″ can be inserted. This base
40
″ is overlaid on a surface of a cloth and further a plate having rivet holes are overlaid on a back face of the cloth. Finally, with the cloth sandwiched, the rivets
53
″ provided on the base
40
″ are pressed and crushed to fix the cloth.
In the twist latch shown in
FIG. 21
described above, a pair of the leg portions
50
′,
50
′ provided on a bottom face of the plug main body
4
′ is inserted through the surface of the cloth such as a bag, and then, through holes
32
′,
32
′ of the plate
6
′ are fit onto the leg portions
50
′,
50
′ existing on the back side of the cloth so as to mount the main body
4
′ on the cloth. Therefore, if the plug main body
4
′ is pulled strongly in a direction away from the surface of the cloth, the plug main body
4
′ may be departed from the cloth easily when the plate is removed from the leg portions
50
′,
50
′ of the plug main body
4
′, because there is no means for preventing a slip-out of the leg portions
50
′,
50
′ from the through holes
32
′,
32
′ except the engaging step portions
50
a
′,
50
a
′ formed on the leg portions
50
′,
50
′. Further, the leg portions
50
′,
50
′ may be protruded out of the plate
6
′, thereby causing a problem that the protruded leg portions
50
′,
50
′ may catch contents of the bag.
In the twist latch shown in
FIG. 22
, the plug main body is set to the surface of a cloth such as a bag while the plate
60
″ is placed on a back side of the cloth so as to nip the cloth. Then, the main body and the plate
60
″ are fixed together with rivets
54
″ so that the main body is fixed onto the cloth. Therefore, a quantity of components increases, which leads to increase of production cost, and inventory control of the components becomes complicated. Further, the attachment work using the rivets
53
″,
54
″ is troublesome.
SUMMARY OF THE INVENTION
The present invention has been achieved in views of the above-described problems. Therefore, an object of a first aspect of the present invention is to provide a plug of a twist latch ensuring safety because the plug is not protruded inside a bag and having a good appearance, bearing a long-term use and facilitating an attachment work thereof. For this purpose, a main body of the plug of the twist latch is inserted into a hole portion provided on a cloth such as a bag from a back side of the cloth and a fixing plate is fit to the plug main body appearing on the surface of the cloth from that surface, so that the plug main body can be attached firmly with stability to the cloth in a condition that it is fixed to the back side of the cloth.
Further, an object of a second aspect of the present invention is to provide a plug of a twist latch which facilitates attachment of the plug onto a cloth and insertion of the plug into a hole portion of a socket or fixing plate mounted to a cover.
Furthermore, an object of a third aspect of the present invention is to provide a plug of a twist latch which can be fixed firmly to a cloth by means of a simple mechanism and attached easily to adapt to a thickness of the cloth.
Still further, an object of a fourth aspect of the present invention is to provide a plug of a twist latch whose knob body can be attached to the main body easily and which has a knob portion having such a shape that facilitates gripping and operating thereof.
Still further, an object of a fifth aspect of the present invention is to provide a socket of a twist latch which can be engaged with the plug easily and fixed to a cloth in a stabilized condition by specifying a shape of the socket to correspond to the plug.
Still further, an object of a sixth aspect of the present invention is to provide a plug and a socket of a twist latch which allow the fixing plate to be engaged with the plug and socket easily so that the twist latch can be attached to a cloth easily.
Still further, an object of a seventh aspect of the present invention is to provide a fixing plate of a twist latch which can be commonly used for both the plug and the socket thereby realizing an effective attachment work.
Still further, an object of an eighth aspect of the present invention is to provide a plug and a socket of a twist latch having a struct
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Sakran Victor N.
YKK Corporation
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