JP4280372B2 - Case for lead frame - Google Patents

Case for lead frame Download PDF

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Publication number
JP4280372B2
JP4280372B2 JP25553299A JP25553299A JP4280372B2 JP 4280372 B2 JP4280372 B2 JP 4280372B2 JP 25553299 A JP25553299 A JP 25553299A JP 25553299 A JP25553299 A JP 25553299A JP 4280372 B2 JP4280372 B2 JP 4280372B2
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JP
Japan
Prior art keywords
lid
lead frame
container
corner
edge
Prior art date
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Expired - Lifetime
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JP25553299A
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Japanese (ja)
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JP2001080645A (en
Inventor
均 風間
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東洋樹脂株式会社
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Priority to JP25553299A priority Critical patent/JP4280372B2/en
Publication of JP2001080645A publication Critical patent/JP2001080645A/en
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Publication of JP4280372B2 publication Critical patent/JP4280372B2/en
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Description

【0001】
【発明の属する技術分野】
本発明はICチップを搭載したリードフレームの運搬、保存用ケースに関するものである。
【0002】
【従来の技術】
従来のICチップを搭載したリードフレームの運搬、保存用ケースは容器と蓋とで構成されており、該蓋には蓋のずれ防止のための凸縁或は突起が容器側壁の内側或は外側の一方のみへ突設されている。
【0003】
【発明が解決しようとする課題】
しかし、リードフレームの運搬、保存用ケースは運搬、収納時には幾段にも積み上げられ、下段のケースにはかなりの圧力が加わるので、従来のリードフレーム用ケースでは容器側壁が外側に湾曲し蓋が容器内部に落ち込み或いは容器側壁が内側に曲折し、リードフレームが損傷を受けてしまっている。特に最近はICパッケージ技術の進歩によりリードフレームが立体的形状をしているため、上方向よりの圧力に対してリードフレームが変形しやすくなっており、リードフレームの損傷が著しい。そこで、上方向よりの圧力が加わった場合であっても容器側壁が外側に湾曲し蓋が容器内部に落ち込まない、或は容器側壁が内側に曲折しないリードフレーム用ケースの提供が望まれていた。
【0004】
【課題を解決するための手段】
そこで本発明では上記課題を解決するため、方形底板上の四隅にコーナー壁を植立させ、両側面のコーナー壁間には側壁を形成すると共に、切欠部を設け、両端面のコーナー壁間には切欠部を設けて容器を形成する一方、平板状の蓋には、コーナー壁内縁及び側壁内縁に嵌合する蓋縁を形成し、且つ側壁外縁上端に設けた嵌合溝に嵌合する嵌合爪を形成し、更に、コーナー壁両端面に形成した係止孔に係止させる係止爪を蓋縁に設けることを特徴とする。
【0005】
【発明の実施の形態】
以下、本発明を図に示す実施例に従って説明する。
1はリードフレーム用ケースであり、合成樹脂等で形成された容器2と蓋3から構成されている。容器2はリードフレームの形状に対応して長方形の底板21の四隅にコーナー壁22,22…を植立し、両側面のコーナー壁22,22間に側壁23を形成すると共に、切欠部24を設ける一方、両端面のコーナー壁22,22間にも切欠部25を設ける。側壁23の外縁上端には嵌合溝231を形成すると共に、コーナー壁22の両端面には係止孔221を適宜数穿設する。更に、容器底面に凹部25を適宜数形成する。
【0006】
コーナー壁22,22…は底板21の四隅に底板21端部に沿ってL字形に植立させて形成させ、該コーナー壁22,22…及び側壁23,23は収納するリードフレームに対応して適宜高に形成するものとし、側壁23は容器2の側面の略中央に植立する。コーナー壁22の側面及び側壁23の形状は台形に形成すると共に、コーナー壁22の端面は正四角形に形成する。勿論コーナー壁22の側面及び側壁23或はコーナー壁22の端面の形状はこれに限られることなく夫々正四角形等或は台形等としてもよい。また、側壁23は容器2の一側面に二以上設けてもよい。
【0007】
嵌合溝231は側壁23の中央部外縁上端を切欠いて形成し、切欠かれた側壁23の内縁は上端まで切欠かれることなく形成されている。嵌合溝231の形状は嵌合爪33の形状と略同一に形成し、嵌合溝231と嵌合爪33が嵌合可能としている。尚、嵌合溝231は嵌合爪33に対応させて一側壁に二以上の適宜数を設けてもよく、側壁23に加えてコーナー壁22,22…の側面の外縁上端に設けてもよい。
【0008】
係止孔221は係止爪321を係止させ、容器2と蓋3を結合させるためのものである。係止孔221はコーナー壁22,22…の両端面に各々一個を、係止爪321を挿入可能な形状に形成すると共に、係止孔221の上端からコーナー壁22の上端までの幅が係止爪321上端から蓋縁32上端の幅と同幅に成るように係止孔221をコーナー壁22に形成する。尚、係止孔221は係止爪321に対応して、適宜数設ければよく、必ずしも両端面に各々2個である必要はなく、1個或は3個以上設けてもよい。
【0009】
凹部26はリードフレーム用ケース1,1…を重ねる際に上下のリードフレーム用ケース1,1…のずれを防止するためのものであり、凸部34を嵌合させる部分であり、凸部34に対応する底板21下面に凹設する。凹部26の形状は特に限定されないが、凸部34の形状と略同一とすることは推奨される。
【0010】
切欠部24,25はリードフレームを容器2に出し入れする際に移動搭載用アームの出入場所となる箇所であり、容器2の側面及び端面を底板21まで切欠くことにより構成されている。切欠部24は容器2側面のコーナー壁22と側壁23の間に設け、切欠部25は容器2側端のコーナー壁22,22の間に設ける。
【0011】
蓋3は長方形の平板状の蓋板31から蓋縁32及び嵌合爪33を下方に突設し、蓋3の蓋板31上面に凸部34を適宜数形成すると共に、蓋縁32には係止爪321を水平方向に突設して形成する。蓋縁32は容器2と蓋3がずれないように設けるものであり、容器2と蓋3の結合時にコーナー壁22,22…及び側壁23,23の内壁に嵌合するように形成する。
【0012】
嵌合爪33,33は嵌合溝231,231に対応する蓋3の側端略中央部より下方に突設するが、その形状は嵌合力、嵌合爪33の強度等を考慮し、高さ2ミリメートル、幅5ミリメートル、奥行1ミリメートル以上とすることは推奨される。そして、容器2に蓋3を装着した際に、嵌合爪33,33は嵌合溝231,231に嵌合すると共に、嵌合爪33と蓋縁32の間に側壁23が嵌合する。尚、嵌合爪33はリードフレーム用ケース1の大きさ、側壁23の位置、数等によっては蓋3の一側端に複数設けてもよい。この場合、嵌合溝231は側壁23に複数設けてもよく、コーナー壁22側面部に設けてもよい。
【0013】
係止爪321は容器2に蓋3をする際に、係止爪321,321…を係止孔221,221…に挿入することにより、容器2と蓋3を結合させ、蓋3が容易に外れないようにするためのものである。係止爪321は蓋縁32両側端から夫々一乃至二以上を水平方向に突設するが、0.5ミリメートル程度に突設して形成すると共に、その縦断面は正四角形とすることは推奨される。
【0014】
凸部34はリードフレーム用ケース1,1…を重ねる際に凹部26に嵌合させるものであり、蓋板31上面に適宜数を凸設する。その形状は凹部26に嵌合可能であれば特に限定されないが、凹部26と略同一形状に形成すると共に、リードフレーム用ケース1,1…のずれを確実に防止するため凸部34及び凹部26の縦断面が正四角形とすることは推奨される。尚、蓋3の上面31に凹部、底板21下面に凸部を形成してリードフレーム用ケース1,1…のずれを防止してもよい。
【0015】
次いで、その使用方法について説明すれば、まず、容器2に適宜数のリードフレームを移動搭載用アーム等を使用して収納する。この際、リードフレームを保持する移動搭載用アームは切欠部24,24或は切欠部25,25に出入させる。蓋3をする際には、まず一端の蓋縁32をコーナー壁22内側に押し付けて係止爪321,321を係止孔221,221に挿入結合し、ついで結合した一端の蓋縁32をコーナー壁22内側に押し付けつつ蓋3の他端を降下し該他端の蓋縁32の係止爪321,321を係止孔221,221に挿入結合する。この際に、嵌合爪33,33が嵌合溝231,231に嵌合されると共に、側壁23が蓋縁32と嵌合爪33の間に保持される。リードフレーム用ケース1,1…を重ねる際には凸部34,34に凹部26,26を嵌合させて行う。
【0016】
【発明の効果】
以上のように、請求項1の発明によれば、方形底板上の四隅にコーナー壁を植立させ、両側面のコーナー壁間には側壁を形成すると共に、切欠部を設け、両端面のコーナー壁間には切欠部を設けて容器を形成する一方、平板状の蓋には、コーナー壁内縁及び側壁内縁に嵌合する蓋縁を形成し、且つ側壁外縁上端に設けた嵌合溝に嵌合する嵌合爪を形成し、更に、コーナー壁両端面に形成した係止孔に係止させる係止爪を蓋縁に設けることを特徴としたので、リードフレーム用ケースを幾段にも重ねて下部のリードフレーム用ケースに上方向よりの圧力が加わった場合であってもリードフレーム用ケースの容器側壁が外側に湾曲し蓋が容器内部に落ち込むことがなく、また、容器側壁が内側に曲折することもないので、リードフレームが損傷することがない。また、リードフレームの出入を容易に行うことが可能となり、作業効率を向上することが可能となった。
【0017】
又、請求項2の発明によれば、蓋上面に凸部又は凹部を設けると共に、容器底面に蓋上面に設けた凸部又は凹部に対応する凹部または凸部を設けたので、リードフレーム用ケースを重ねてもリードフレーム用ケース同士がずれることがないので、リードフレーム用ケースを幾段に重ねても、安定し、倒壊する恐れがないので、運搬、収納時に場所をとらず便利である。
【図面の簡単な説明】
【図1】 本発明一実施例分解斜視図
【図2】 本発明一実施例端面部使用状態縦断面図
【図3】 本発明一実施例側面部使用状態縦断面図
【図4】 本発明一実施例使用状態斜視図
【図5】 本発明一実施例使用状態縦断面図
【符号の説明】
1 リードフレーム用ケース
2 容器
21 底板
22 コーナー壁
221 係止孔
23 嵌合溝
24 切欠部
25 切欠部
26 凹部
3 蓋
31 蓋板
32 蓋縁
321 係止爪
33 嵌合爪
34 凸部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a case for carrying and storing a lead frame on which an IC chip is mounted.
[0002]
[Prior art]
A conventional lead frame carrying and storing IC chip is composed of a container and a lid, and the lid has a convex edge or protrusion to prevent the lid from slipping inside or outside the container side wall. It protrudes to only one of these.
[0003]
[Problems to be solved by the invention]
However, the lead frame transport and storage cases are stacked many times during transport and storage, and considerable pressure is applied to the lower case. Therefore, in the case of the conventional lead frame, the container side wall is curved outward and the lid is The lead frame has fallen into the container or the side wall of the container has been bent inward, and the lead frame has been damaged. In particular, recently, the lead frame has a three-dimensional shape due to the advancement of IC package technology. Therefore, the lead frame is easily deformed by an upward pressure, and the lead frame is significantly damaged. Therefore, it has been desired to provide a lead frame case in which the container side wall is curved outward and the lid does not fall into the container even when pressure from above is applied, or the container side wall does not bend inward. .
[0004]
[Means for Solving the Problems]
Therefore, in the present invention, in order to solve the above problems, corner walls are planted at the four corners on the square bottom plate, side walls are formed between the corner walls on both sides, and notches are provided between the corner walls on both ends. The notch is used to form the container, while the flat lid has a lid edge that fits into the corner wall inner edge and the side wall inner edge, and fits into the fitting groove provided at the upper end of the side wall outer edge. An engaging claw is formed, and further, an engaging claw that is engaged with an engaging hole formed on both end surfaces of the corner wall is provided on the lid edge.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.
Reference numeral 1 denotes a lead frame case, which includes a container 2 and a lid 3 formed of synthetic resin or the like. Corresponding to the shape of the lead frame, the container 2 is planted with corner walls 22, 22... At the four corners of the rectangular bottom plate 21, and side walls 23 are formed between the corner walls 22, 22 on both sides, and the notches 24 are formed. On the other hand, a notch 25 is also provided between the corner walls 22 on both end faces. A fitting groove 231 is formed at the upper edge of the outer edge of the side wall 23, and a number of appropriate locking holes 221 are formed in both end faces of the corner wall 22. Further, an appropriate number of recesses 25 are formed on the bottom surface of the container.
[0006]
The corner walls 22, 22 ... are formed by being planted in an L shape along the end of the bottom plate 21 at the four corners of the bottom plate 21, and the corner walls 22, 22 ... and the side walls 23, 23 correspond to the lead frames to be accommodated. The side wall 23 is planted substantially at the center of the side surface of the container 2. The side surface of the corner wall 22 and the shape of the side wall 23 are formed in a trapezoidal shape, and the end surface of the corner wall 22 is formed in a regular square. Of course, the shape of the side surface of the corner wall 22 and the side wall 23 or the end surface of the corner wall 22 is not limited to this, and may be a regular square or a trapezoid. Two or more side walls 23 may be provided on one side surface of the container 2.
[0007]
The fitting groove 231 is formed by notching the upper edge of the outer edge of the central portion of the side wall 23, and the inner edge of the notched side wall 23 is formed without being cut out to the upper end. The shape of the fitting groove 231 is formed substantially the same as the shape of the fitting claw 33 so that the fitting groove 231 and the fitting claw 33 can be fitted. The fitting groove 231 may be provided in an appropriate number of two or more on one side wall corresponding to the fitting claw 33, and may be provided on the upper edge of the outer edge of the side surfaces of the corner walls 22, 22. .
[0008]
The locking hole 221 is for locking the locking claw 321 and connecting the container 2 and the lid 3. Each of the locking holes 221 is formed on each end face of the corner walls 22, 22... So that the locking claw 321 can be inserted, and the width from the upper end of the locking hole 221 to the upper end of the corner wall 22 is related. A locking hole 221 is formed in the corner wall 22 so as to be the same width as the width of the upper end of the lid edge 32 from the upper end of the pawl 321. Note that the number of the locking holes 221 corresponding to the locking claws 321 may be appropriately set, and it is not always necessary that two are provided on both end faces, and one or three or more may be provided.
[0009]
The recess 26 is for preventing the upper and lower lead frame cases 1, 1... From being displaced when the lead frame cases 1, 1. The bottom plate 21 corresponding to is recessed in the lower surface. The shape of the concave portion 26 is not particularly limited, but it is recommended that the shape is substantially the same as the shape of the convex portion 34.
[0010]
The notches 24 and 25 are locations where the movable mounting arm is put in and out when the lead frame is put in and out of the container 2, and is configured by cutting out the side surface and end surface of the container 2 to the bottom plate 21. The notch 24 is provided between the corner wall 22 and the side wall 23 on the side surface of the container 2, and the notch 25 is provided between the corner walls 22 and 22 on the container 2 side end.
[0011]
The lid 3 has a lid edge 32 and a fitting claw 33 projecting downward from a rectangular flat lid plate 31, and an appropriate number of convex portions 34 are formed on the upper surface of the lid plate 31 of the lid 3. The locking claw 321 is formed by protruding in the horizontal direction. The lid edge 32 is provided so that the container 2 and the lid 3 do not deviate from each other, and is formed so as to be fitted to the inner walls of the corner walls 22, 22.
[0012]
The fitting claws 33, 33 project downward from the substantially central portion of the side end of the lid 3 corresponding to the fitting grooves 231, 231, but the shape is high considering the fitting force, the strength of the fitting claws 33, etc. It is recommended that the height is 2 millimeters, the width is 5 millimeters, and the depth is 1 millimeter or more. When the lid 3 is attached to the container 2, the fitting claws 33 and 33 are fitted into the fitting grooves 231 and 231, and the side wall 23 is fitted between the fitting claw 33 and the lid edge 32. A plurality of fitting claws 33 may be provided at one end of the lid 3 depending on the size of the lead frame case 1, the position and number of the side walls 23, and the like. In this case, a plurality of fitting grooves 231 may be provided on the side wall 23 or may be provided on the side surface of the corner wall 22.
[0013]
When the locking claw 321 puts the lid 3 on the container 2, the locking claw 321, 321... Is inserted into the locking holes 221, 221. This is to prevent it from coming off. One or more locking claws 321 protrude horizontally from both ends of the lid edge 32, but it is recommended that the locking claws 321 protrude to about 0.5 millimeters and that the vertical cross section be a regular square. Is done.
[0014]
The convex portions 34 are fitted into the concave portions 26 when the lead frame cases 1, 1... Are overlapped. The shape is not particularly limited as long as it can be fitted into the recess 26, but it is formed in substantially the same shape as the recess 26, and the protrusion 34 and the recess 26 are surely prevented from shifting the lead frame cases 1, 1. It is recommended that the vertical cross-section is a regular square. Note that a recess may be formed on the upper surface 31 of the lid 3 and a convex portion may be formed on the lower surface of the bottom plate 21 to prevent the lead frame cases 1, 1.
[0015]
Next, the usage method will be described. First, an appropriate number of lead frames are accommodated in the container 2 using a moving mounting arm or the like. At this time, the movable mounting arm that holds the lead frame is moved into and out of the notches 24 and 24 or the notches 25 and 25. When the lid 3 is to be attached, the lid edge 32 at one end is first pressed against the inside of the corner wall 22 and the latching claws 321 and 321 are inserted and coupled to the latching holes 221 and 221, and then the coupled lid edge 32 at the one end is cornered. The other end of the lid 3 is lowered while being pressed against the inside of the wall 22, and the locking claws 321 and 321 of the lid edge 32 at the other end are inserted and coupled to the locking holes 221 and 221. At this time, the fitting claws 33 and 33 are fitted into the fitting grooves 231 and 231, and the side wall 23 is held between the lid edge 32 and the fitting claw 33. When the lead frame cases 1, 1... Are stacked, the concave portions 26, 26 are fitted to the convex portions 34, 34.
[0016]
【The invention's effect】
As described above, according to the first aspect of the present invention, the corner walls are planted at the four corners on the rectangular bottom plate, the side walls are formed between the corner walls on both sides, the notches are provided, and the corners on the both end surfaces are provided. While the container is formed by providing a notch between the walls, the flat lid has a lid edge that fits the corner wall inner edge and the side wall inner edge, and fits into the fitting groove provided at the upper end of the side wall outer edge. The fitting claw is formed, and the lid edge is provided with a locking claw that locks into the locking holes formed on both end faces of the corner wall. Even when pressure from above is applied to the lower lead frame case, the container side wall of the lead frame case is curved outward and the lid does not fall into the container. The lead frame will be damaged because it will not bend. That there is no. In addition, the lead frame can be easily put in and out, and the work efficiency can be improved.
[0017]
According to the second aspect of the present invention, since a convex portion or a concave portion is provided on the upper surface of the lid, and a concave portion or a convex portion corresponding to the convex portion or the concave portion provided on the upper surface of the lid is provided on the bottom surface of the container. Since the lead frame cases do not deviate from each other even if the lead frames are stacked, no matter how many lead frame cases are stacked, the lead frame cases are stable and there is no risk of collapsing.
[Brief description of the drawings]
1 is an exploded perspective view of an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of an end surface portion of the embodiment of the present invention. FIG. 3 is a longitudinal sectional view of an embodiment of a side surface of the embodiment of the present invention. FIG. 5 is a perspective view of the state of use of one embodiment. FIG. 5 is a longitudinal sectional view of the state of use of one embodiment of the present invention.
DESCRIPTION OF SYMBOLS 1 Lead frame case 2 Container 21 Bottom plate 22 Corner wall 221 Locking hole 23 Fitting groove 24 Notch 25 Notch 26 Recess 3 Cover 31 Cover plate 32 Cover edge 321 Locking claw 33 Fitting claw 34 Projection

Claims (2)

方形底板上の四隅にコーナー壁を植立させ、両側面のコーナー壁間には側壁を形成すると共に、切欠部を設け、両端面のコーナー壁間には切欠部を設けて容器を形成する一方、平板状の蓋には、コーナー壁内縁及び側壁内縁に嵌合する蓋縁を形成し、且つ側壁外縁上端に設けた嵌合溝に嵌合する嵌合爪を形成し、更に、コーナー壁両端面に形成した係止孔に係止させる係止爪を蓋縁に設けたことを特徴とするリードフレーム用ケース。While corner walls are planted at the four corners on the square bottom plate, side walls are formed between the corner walls on both sides, a notch is provided, and a notch is provided between the corner walls on both ends to form a container. The flat lid is formed with a lid edge that fits the corner wall inner edge and the side wall inner edge, and a fitting claw that fits into a fitting groove provided at the upper end of the side wall outer edge. A lead frame case, wherein a locking claw for locking in a locking hole formed on a surface is provided on a lid edge. 蓋上面に凸部又は凹部を設けると共に、容器底面に蓋上面に設けた凸部又は凹部に対応する凹部又は凸部を設けることを特徴とする請求項1に記載のリードフレーム用ケース。The lead frame case according to claim 1, wherein a convex portion or a concave portion is provided on the upper surface of the lid, and a concave portion or a convex portion corresponding to the convex portion or the concave portion provided on the upper surface of the lid is provided on the bottom surface of the container.
JP25553299A 1999-09-09 1999-09-09 Case for lead frame Expired - Lifetime JP4280372B2 (en)

Priority Applications (1)

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JP25553299A JP4280372B2 (en) 1999-09-09 1999-09-09 Case for lead frame

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Application Number Priority Date Filing Date Title
JP25553299A JP4280372B2 (en) 1999-09-09 1999-09-09 Case for lead frame

Publications (2)

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JP2001080645A JP2001080645A (en) 2001-03-27
JP4280372B2 true JP4280372B2 (en) 2009-06-17

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100745506B1 (en) * 2001-05-07 2007-08-02 삼성테크윈 주식회사 lead frame stacking cassette and lead frame inspecting process with the same
KR101469347B1 (en) * 2013-02-25 2014-12-09 (주)Sy이노베이션 Cases for lead frames

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