JPH11330140A - Spool case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spool case for tightly holding a spool and preventing a bonding wire around the spool from coming off during transportation, and removing the spool easily without the possibility of erroneous operation that causes the spool to run into an outer wall of the main containing body. SOLUTION: A spool case is constituted of a main, containing resin body with an upward swelled engagement part to be engaged with a tube-shaped spool, and a cover with a downward swelled engagement part to be engaged with the tube-shaped spool. The cover is engaged with the main containing body at its outer circumferential wall part. In this case, the inner circumferential face of the spool is pressed by at least one engagement part of the main containing body or the cover to hold the spool firmly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spool case for a bonding wire used for a semiconductor device or a superconducting device.

[0002]

2. Description of the Related Art Conventionally, a container body made of a synthetic resin integrally provided with an upwardly bulging fitting ridge for fitting a cylindrical spool, and a lid body fitting to a peripheral wall ridge of the container body. Spool cases are known. In this conventional case, the fitting ridge in the container main body is formed in the shape of a gentle truncated cone, whereby the spool is firmly held by the fitting ridge.

[0003]

However, the inner diameter of the spool may vary due to manufacturing reasons. According to the above structure, when the diameter of the spool is too large, the inner peripheral surface of the spool and the fitting ridge come into close contact. Can not hold the spool without
The spool vibrates in the container during transportation or the like, which causes problems such as collapse of the bonding wire wound around the outer periphery of the spool. On the other hand, when the spool is too small, the inner peripheral surface of the spool and the fitting ridge are in close contact over a wide area, and it is difficult to remove the spool when taking out the spool. Troubles such as damage due to contact with the outer peripheral wall of the vehicle.

On the other hand, there has been proposed a device in which a plurality of protruding edges protruding outward are integrally formed at predetermined intervals on a peripheral wall. However, when the protruding edge is made large, the same problem as described above occurs. When the protruding edge is made small, it is difficult to form the protruding portion, the shape tends to vary, and the contact with the spool sometimes fails.

Therefore, the present invention utilizes a spool shape to support and firmly hold a spool at a contact portion between a container body and a lid, and to use a bonding wire wound around the outer periphery without causing the spool to vibrate in the container. An object of the present invention is to provide a spool case that does not collapse or is damaged during transportation.

[0006]

A spool case according to the present invention for solving the above-mentioned problems comprises a synthetic resin container body integrally provided with an upwardly bulging fitting ridge for fitting a cylindrical spool. A spool case integrally comprising a downwardly bulging fitting ridge for fitting the tubular spool, the cover case being fitted on an outer peripheral peripheral wall ridge of the container body, wherein the container body and the lid body are provided. Wherein at least one of the fitting ridges presses the inner peripheral surface of the tubular spool to hold the spool.

The portion for pressing the inner peripheral surface of the cylindrical spool may be a part of the outer periphery of the fitting ridge, and the number of pressing portions may be two or more on the outer periphery.

Further, the center line of the fitting ridge of the container body and the center line of the fitting ridge of the lid may be separated by 0.1 to 50 mm.

[0009]

According to the structure of the present invention, at least one of the container body and the lid presses the inner peripheral surface of the cylindrical spool, so that the spool and the container are integrated. Is held. If the center line of the fitting ridge of the container body and the center line of the fitting ridge of the lid are separated by 0.1 to 50 mm, when the spool is fitted into the fitting ridge of the container body, the There is no need to make contact with the fitting ridge, and when the lid is fitted to the outer peripheral wall ridge of the container body, the fitting ridge of the lid shifts the spool horizontally.

The spool case of the present invention can be formed by a vacuum forming method using a synthetic resin material.

A plurality of projecting ridges for pressing the spool are formed on the fitting ridge between the container body and the lid, and at least one of the container body and the lid has a minimum diameter of a circle including the projecting ridge. In order to make the spool shorter than the inner diameter and to have a function of moving the spool to one side, the planar distance between the projecting ridges of the fitting case is set to be equal to or larger than the maximum spool inner diameter.

The protruding ridge has a function of moving the spool to one side, so that if the spool contact portion is within a semicircular range,
There is no particular limitation on the shape and continuous or discontinuous, but if it is a shape with a fan-shaped protrusion on a gentle truncated cone or a discontinuous shape,
It is preferable to have a few points of close contact with the spool, such as V-shape and W-shape, because of easy molding and high durability.

If the contact portion is large, the spool does not move in a predetermined direction due to spool deformation or molding error, and the contact portion with the spool does not form a pair, which leads to a reduction in spool holding force. Preferably, it is within 90 ° for a continuous body and within 120 ° for a discontinuous body.

The fitting ridge may have a shape of a circular truncated cone or the shape of the above-mentioned protruding ridge, or an ellipse or heart, which is a modification thereof. The center of the small lid fitting ridge is moved in any direction within the range of 0.1 mm to 50 mm, and the plane distance between the body fitting ridge and the lid fitting ridge inside the spool is maximum. Even with a structure having a spool inner diameter or more, the spool is strongly pressed against the opposing contact portions of the main body and the lid fitting ridge and the opposed flat contact portions of the main body and the lid, and the spool is firmly held. Is easy to attach and detach.

[0015]

The spool case of the present invention is supported at four or more opposing contact portions between the container body and the lid by utilizing the spool shape, so that the spool is held firmly. For this reason, the spool does not vibrate in the container, and the bonding wire wound around the outer periphery does not collapse during transportation.

Further, since there is no need to hold the spool only by the container main body, the spool can be easily attached and detached, and the outer peripheral wall of the container main body does not accidentally be damaged. If the protruding ridge is shaped to press the inner circle of the spool, it is not necessary to make a small protruding edge, so a wide contact area can be secured,
The molding thickness is stable, the strength is increased, and the number of times of repeated use is increased.

Claims (4)

[Claims] A synthetic resin container body integrally provided with an upwardly bulging fitting ridge for fitting a cylindrical spool, and a downwardly bulging fitting ridge for fitting the cylindrical spool. A spool case comprising a lid fitted to an outer peripheral wall ridge of the container body integrally provided, wherein at least one of the fitting ridges of the container body and the lid is an inner periphery of the cylindrical spool. A spool case for a bonding wire, wherein a surface is pressed to hold a spool. 2. The spool case according to claim 1, wherein the portion that presses the inner peripheral surface of the cylindrical spool is a part of the outer periphery of the fitting ridge. 3. The spool case according to claim 2, wherein there are two or more portions on the outer periphery of the fitting ridge that press the inner peripheral surface of the cylindrical spool. 4. The spool case according to claim 1, wherein a center line of the fitting ridge of the container body and a center line of the fitting ridge of the lid are apart from each other by 0.1 to 50 mm.