JPH0512207Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a spool case for bonding wire for semiconductor devices or superconducting devices.

(Prior Art and Problems Thereof) Conventionally, a spool case has been known that is made of a synthetic resin container body that is integrally provided with an upwardly bulging fitting protuberance for fitting a cylindrical spool, and a lid body that fits onto the outer peripheral wall protuberance of the container body (Japanese Utility Model Publication No. 1980).
-Publication No. 75996).

In this conventional case, the fitting ridge on the container body is formed into a gently truncated conical shape, thereby firmly fixing the spool to the fitting ridge.

However, due to manufacturing reasons, the inner diameter of the spool may vary, and according to the above-mentioned conventional structure, when the spool diameter is too small, the inner peripheral surface of the spool and the fitting ridge come into close contact over a wide range. When removing the spool, it is difficult to remove it, and if you try to remove it with strong force, the bonding wire that can be wound around the spool will come into contact with the outer peripheral wall of the container body, causing problems such as damage.

(Problem to be solved by the invention) The present invention was made in view of the above conventional circumstances, and its purpose is to firmly fix the spool even if there is slight variation in the spool diameter. To provide a spool case which can be easily taken out at an extremely low cost.

(Means for Solving the Problems) In order to achieve the above technical problems, the spool case of the present invention is made of synthetic resin and integrally equipped with an upwardly bulging fitting ridge into which a cylindrical spool is fitted. A spool case consisting of a container body and a lid that fits into an outer circumferential wall ridge of the container body, wherein outwardly projecting edges are spaced at predetermined intervals on the circumferential wall of the fitting ridge in the container body. It is characterized by a plurality of pieces being integrally formed.

(Function) According to the above structure, when the spool is inserted into the fitting ridge of the container body, the protrusion comes into pressure contact with the inner peripheral surface of the spool, and the elasticity of the container body made of synthetic resin causes the spool to fit into the fitting ridge. The peripheral wall of the rim is pressed inward together with the rim, and the entire peripheral wall and the rim are elastically deformed, and the resulting repulsive force of the surrounding wall and rim allows the rim to move into the spool while absorbing errors in the spool inner diameter. Hold the spool in a fixed state by firmly pressing it against the circumferential surface.

(Example) 1 to 3 represent one embodiment of the present invention.

As shown in FIG. 3, the spool case A of this embodiment includes a container body 1 provided with an upwardly bulging fitting ridge 3 into which a cylindrical spool B is fitted, and a container body 1.
It consists of a lid body 6 that removably fits into the.

As shown in FIGS. 1 and 2, the container body 1 is molded using a synthetic resin material by a vacuum forming method or the like, and the container body 1 has an approximately inverted V-shaped cross section on its outer periphery. A shaped peripheral wall ridge 2 is made to protrude, and a fitting ridge 3 into which a spool B is fitted is integrally formed in the central part in a protruding shape.

The fitting ridge 3 is formed into a gentle truncated cone shape with a circular planar shape and a slightly tapered shape, and its height is made to protrude higher than the circumferential wall ridge 2.

Further, the fitting ridge 3 is formed in an upwardly bulging shape, and a projecting edge 4 is integrally bulged on the peripheral wall 5 of the fitting ridge 3.

The projecting edge 4 has a required length upward from the base end of the fitting ridge 3, and is formed so as to have a substantially arcuate cross section toward the axis of the fitting ridge 3. Further, a plurality of projecting edges 4, preferably two to four (four in the drawing), are formed on the peripheral wall 5 of the fitting ridge 3 at predetermined intervals.

The lid body 6 is made of synthetic resin and is made up of a side peripheral part 6a that fits on the outer surface of the peripheral wall ridge 2 of the container body 1, and a recessed part 6b that fits into the upper opening part of the spool B that fits into the fitting ridge 3. It is an integrally molded product that fits into the fitting protrusion 3.
To more securely fix the held spool B and to protect the bonding wire W wound around the spool B.

Thus, in the spool case A of this embodiment having the above configuration, when the spool B around which the bonding wire W is wound is inserted into the fitting ridge 3 of the container body 1 from above, the fitting ridge 3 The projecting edge 4 of the peripheral wall 5 is elastically pressed against the inner circumferential surface of the spool B to hold the spool B in a fixed state.

That is, since the container body 1 is an integrally molded product made of synthetic resin, when the ridge 4 comes into pressure contact with the inner peripheral surface of the spool B, the elasticity of the container body 1 causes the peripheral wall 5 of the fitting ridge 3 and the ridge 4 to move inwards. The surrounding wall 5 is elastically deformed as shown in FIG.
And the repulsive force (restoring force) of the elastically deformable protrusion 4' absorbs the error in the inner diameter of the spool B, while firmly pressing the protrusion 4' against the inner circumferential surface of the spool B.
Hold spool B in a fixed state.

Furthermore, since the spool B can be held as described above in a state where the contact area between the inner circumferential surface of the spool B and the fitting ridge 5 is extremely small with only the protruding edge 4, it is easy to remove the spool B when taking it out.

In addition, the lid 6 is placed from above the spool B held in the container body 1 as described above, and the side circumference 6a
by fitting into the outer surface of the peripheral wall ridge 2 and the recessed part 6b into the upper opening of the spool B, respectively.
Needless to say, it is possible to more reliably fix and hold the spool, as well as to accommodate and protect it within the spool case A.

Further, in this embodiment, the projecting edge 4 has a required length upward from the base end of the fitting ridge 5, and
Although the description has been made assuming that the cross section is substantially arc-shaped toward the axis, the present invention is not limited to this, and the fourth embodiment
As shown in the figure, a hemispherical projecting edge 7 may be formed.

(Effects of the invention) Since the spool case of the present invention is constructed as described above, it absorbs variations in the spool diameter by elastic deformation of the ridge formed on the peripheral wall of the fitting ridge, and The projecting edge is firmly pressed against the inner circumferential surface of the spool by the repulsive force of the edge itself, and even if the spools have different inner diameters, the spools can be held securely and firmly without discrimination.

Furthermore, since the contact area between the inner circumferential surface of the spool and the fitting ridge is reduced, the spool can be held securely and firmly while maintaining ease of removal when taking out the spool.

Furthermore, since each of the above effects can be achieved with an extremely simple configuration that requires only a slight modification of the conventional mold, that is, by simply forming the protrusion integrally on the peripheral wall of the fitting ridge, the molding cost is extremely low. etc,
It has many effects.

[Brief explanation of the drawing]

The drawings each show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of the container body, FIG. 2 is a perspective view thereof, and FIG.
The figure is a vertical cross-sectional view of the entire spool case showing the state of use, and FIG. 4 is a vertical cross-sectional view of the container body according to another embodiment. In the figure, A is the spool case, 1 is the container body, 2
is the surrounding wall ridge, 3 is the fitting ridge, 5 is the surrounding wall of the fitting ridge, 4,
7 is a projecting edge, 4' is an elastically deformed projecting edge, 6 is a lid body,
B is a spool.

Claims (1)

[Scope of utility model registration request] A spool case consisting of a synthetic resin container body integrally equipped with an upwardly bulging fitting ridge into which a cylindrical spool is fitted, and a lid body which fits into the outer peripheral wall ridge of the container body, A spool case for bonding wire, characterized in that a plurality of outwardly projecting edges are integrally formed at predetermined intervals on the peripheral wall of the fitting ridge in the container body.