Special receptacle or package – For roll or reel – Wrapped – boxed – or secured through roll core
Reexamination Certificate
1998-08-07
2001-06-05
Sewell, Paul T. (Department: 3728)
Special receptacle or package
For roll or reel
Wrapped, boxed, or secured through roll core
C206S408000
Reexamination Certificate
active
06241094
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a spool case for a bonding wire for a semi-conductor, and more particularly a spool case in which the spool can be handled without being contacted with the bonding wire wound around the spool barrel section.
2. Description of the Prior Art
In the prior art, various kinds of structures have been known as a case in which the spool having the bonding wire wound therearound used in an assembling of a semi-conductor device is stored in it.
For example, the Japanese Utility Model Publication No. Sho 58-41188 discloses a spool case in which the case is comprised of a base having an upward expanded fitting ridge having the spool integrally fitted therein and a cover fitted to the outer circumferential ridge of the base, the cover is formed with a pressing concave section fitted to the spool in correspondence with the fitting ridge, the stored spool is pushed by the fitting ridge and the cover to prevent a looseness of.
In view of the fact, the spool stored in this kind of spool case was installed at the spool holder of the wire bonding device after being taken out at an assembling site of the semi-conductor device, although in the prior art, the flange of the spool in the prior art was held by hand, the hand was contacted with the surface of the wire, thereby there was a possibility that the wire damage was produced.
In order to eliminate the disadvantages, the Japanese Patent Laid-Open No. Hei 7-86326 discloses a spool case for a bonding wire in which the spool case is comprised of a base and a cover to be fitted to each other and at least one of the base and the cover is provided with the spool holding section capable of holding the spool and engaging or disengaging the spool without making any direct contact with hand to the spool.
SUMMARY OF THE INVENTION
However, detailed studying of the prior art spool case described in the aforesaid official gazettes of laid-open patent and utility model showed the following problems.
That is, in reference to the detailed description of the invention, the spool holding section of the spool case is constructed such that an inside part of a loaded wall contacted with the inner wall of the barrel section of the spool is provided with a concave section acting as an operating section for resiliently deforming the loaded wall, a finger inserted into the concave portion is opened outwardly or closed inwardly to cause the loaded wall to be resiliently deformed to adjust a contact pressure of the loaded wall against the inner wall of the barrel section.
In turn, the spool is loaded at the spool holder of the wire bonding device while being fitted from outside, although there are various kinds of lengths of the spool holder in reference to the bonding device, and in recent years, various kinds of spool holders having spool engaging means are proposed to accommodate for an increased weight of total spool as the length of the wire to be wound on the spool is elongated, wherein the engaging means is arranged at the spool holder so as to be contacted with the inner wall of the barrel section of the spool.
Accordingly, in the case that the prior art spool case having the loaded wall contacted with the inner wall of the barrel section of the spool to hold the spool, the spool holding section was struck against the extremity end of the spool holder or the spool engaging means to cause a certain trouble to be found in the installation of the spool.
In addition, the prior art spool case is constructed such that a contact pressure of the spool holding section is adjusted under an opening section or closing operation of the finger inserted into the concave section as described above, an erroneous operation of the finger is performed under a mistake of the operator causes the contacted state to be released and the spool is dropped.
The present invention has been invented in reference to the aforesaid circumstances in the prior art and its object consists in providing a new spool case in which the spool stored in the case can be held without contacting with the spool by hand, engaging or disengaging of the spool in respect to the bonding device can be carried out without having any relation with a length of the spool holder or presence or non-presence of the spool engaging means, a high reliability in holding of the spool can be attained, the spool holding state can be easily maintained.
In order to attain the aforesaid object, the present invention provides a spool case in which a spool for winding up the bonding wire is stored within the spool case comprised of the base and the cover to be fitted to each other and is characterized in that at least one of the base and the cover is provided with an engaging piece for holding the spool while being engageable with the outer circumferential edge of the flange of the spool.
In the case that the present invention is constructed as above, the spool is held by the base or the cover by the engaging pieces arranged in at least one of the base or the cover and the spool can be handled without making a direct contact of the spool. This held state is not released so long as it may not be released by deforming the engaging pieces. In addition, the held state is carried out such that the engaging pieces are engaged with the outer circumferential edge of the flange and held, and it is apparent that no interference is produced at either the wire wound around the spool barrel section or inside part of the spool barrel section.
The aforesaid engaging pieces are preferably of resilient material. In this case, although the engaging pieces are formed in such a way that they may be resiliently engaged with the flange, for example, it is also possible that either synthetic resin material having an appropriate resiliency or metallic material having spring characteristic such as a stainless steel or copper alloy or the like is applied to form a substantial leaf spring shape, a substantial claw shape and a substantial hook shape under wall thickness and size enabling an easy resilient deformation.
The engaging pieces are arranged such that they may be removably engaged with the outer circumferential edge of the flange of the spool. A plurality of the engaging pieces more than two are preferably arranged and more preferably a plurality of more than three engaging pieces are arranged. In addition, the engaging pieces can be formed into a continuous shape without being divided into a plurality of divided sections, resulting in that it can also be applied as the deformable structure.
It may be assumed that the engaging pieces are placed at at least either the base or the cover and also they may be arranged at inside part or outside part.
For example, in the case that the engaging pieces are arranged at the base, the plurality of engaging pieces having the substantial claw shape or the substantial hook shape are arranged at proper spacings along the outer circumferential edge of the flange at at least one of the inner surface of the base abutted against the outer surface of the flange of the stored spool or the outer surface of the base acting as a rear side of the inner surface.
In the case that the pieces are arranged at the cover, it can be illustrated that a plurality of engaging pieces of substantial leaf spring shape are properly spaced apart along the outer circumferential edge of the flange of the stored spool at the inner circumferential surface of the cover.
In the case that the engaging pieces are arranged at the inner surface of the base or the inner surface of the cover, it is possible to store the spool in the spool case under a state in which the spool is held at the base or the cover, and after opening section the case, the base or the cover holding he spool is handled to enable the spool to be handled without making any direct contact with hand to the spool.
In the case that the engaging pieces are arranged at the outer surface of the base, the base is turned over after opening section the case under a state in which the spool is stored in the cover,
Anjo Tadao
Kaji Toshio
Nishimura Keiichi
Sato Osamu
Greenblum & Bernstein P.L.C.
Luong Shian
Sewell Paul T.
Tanaka Denshi Kogyo Kabushiki Kaisha
LandOfFree
Spool case of bonding wire does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spool case of bonding wire, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spool case of bonding wire will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2531403