JPH0831709B2 - Magazine for chip parts - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip component magazine for mounting chip components such as resistors, capacitors, inductors, and semiconductors on a printed circuit board.

2. Description of the Related Art In recent years, along with the need for thinning, miniaturization, and cost reduction of various electronic devices such as TVs, VTRs, and audios, resistors,
Electronic components such as capacitors, inductors, and semiconductors are shifting from discrete shapes to chip components that do not have leads, and these various chip components are moving toward miniaturization to support higher device densities. are doing.

Conventionally, in order to mount a large amount of such chip components in a batch, as shown in FIG. 4, an elongated cylindrical magazine body 1 in which a large number of chip components 2 are aligned and packed is used. Then, apply this to the mounting surface of the printed circuit board 3,
Then, from the bottom of the magazine body 1 with the pin 4 the chip component 2
The chip component 2 was held by the adhesive 5 of the printed circuit board 3 by pushing upward. As shown in FIG. 5, the magazine body 1 used in such a mounting method is composed of a chip part alignment part 7 and a tip part 8 in a cylinder, and both parts are generally manufactured by injection molding of plastic or the like. It had been. In this case, the tip portion 8 of the magazine body 1 is thinner than the outer shape of the chip component alignment portion 7 for high-density mounting. Further, the inside dimensions of the parts of the magazine body 1 are set to be slightly larger than the A + a size, ^assuming that the outer size of the chip part 2 is A ± a ( ^MAX A + a, ^MIN A-a).
It was common to set the car so that it would slide smoothly.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a conventional device, in order to set the dimension inside the cylindrical portion of the magazine body 1 to the dimension A + a or more, when mounting the chip component 2 having the dimension Aa, the chip The position of the component 2 will vary within the clearance range within the magazine body 1, and as a result, when mounted on the printed circuit board 3, FIG.
The electrode 2a of the chip part 2 is mounted on another wiring pattern 10 as shown in FIG. Further, in the soldering pattern portions 9 of the electrodes 2a on both ends of the chip component 2, the left and right solder land areas become unbalanced, and there is a problem that solderability deteriorates. Note that FIG. 6A shows a state in which the chip component 2 is correctly mounted.

In view of the above points, the present invention has an object to prevent variations in mounting due to variations in the size of the chip component 2.

Means for Solving the Problems And, in order to achieve the above object, according to the present invention, a holder for holding a chip component protruding from the inside of the magazine body from both sides thereof is attached to the tip of the magazine body, and the holder is held. The body holds the chip component from both sides thereof, and has at least two holding pieces made of a metal plate having a spring property and projecting forward from the tip of the magazine body, and these two holding pieces face toward the tip. The taper is formed so that the gap between them becomes smaller.

Action With this configuration, even if there are variations in the outer size of the chip component, the chip component can be positioned in the center of the magazine body by the springiness and taper of the two holding pieces, so that as shown in FIG. The center of the soldering pattern portion 9 can be mounted.

Embodiment One embodiment of the present invention will be described below with reference to the drawings.

First, FIGS. 1A and 1B are an exploded perspective view and an assembled perspective view of the magazine main body 13 part. The rectangular tube-shaped magazine body 13 is manufactured by a plastic molding process or the like, and a cylindrical portion 14 on which the chip component 2 slides is formed so as to extend downward. Further, a holder 12 made of a metal plate having a spring property and having a thin plate thickness, such as stainless steel or a phosphor bronze plate, is attached to the tip of the magazine body 13. The holding body 12 has a U-shaped holding piece 15 for holding the chip component 2 from both sides.
Chip slide section 16 with 15 in the same direction as magazine body 13
Has become. Further, the two holding pieces 15 are connected at one side by a connecting portion 15A. Further, these holding pieces 15 are formed with a taper in a direction in which the gap between the holding pieces 15 becomes narrower from the middle portion to the tip end, whereby the width dimension A of the tip end portion of the holding piece 15 is the minimum size A- of the chip component 2. It is set around a, and the rear end is set to the same level as the conventional one (A + a in FIG. 6). As shown in FIG. 1, the rear end of the holding body 12 is positioned by the step portion 18 of the tubular portion 14 and is fixed by press fitting and an adhesive or the like. Reference numeral 17 denotes a spring body provided so that the second chip from the tip of the holding portion 12 does not drop from the tip of the holding body 12 during surface mounting, storage, transportation and the like.

Next, a mounting method will be described with reference to FIG. The chip components 2 are aligned in the chip component alignment portion 7, and the tip of the holder 12 is in contact with the printed circuit board 3. In this state, the pins 4 are pushed from the lower side to the upper side by spring pressure, air pressure, etc., so that the uppermost chip component 2 is attached to the printed board 3 by the adhesive agent 5 to be mounted. At this time, as shown in the drawing, even if the size of the chip component 2 is (A-a), when the tip end portion of the holding piece 15 is reached, the size here is (A-
Since it is a), there is no clearance b and it can be mounted in the center. On the contrary, as shown in FIG. 2B, even if the chip part 2 has a size (A + a), the holding piece 15 is divided into two and has a spring property, so that the second chip from the top is Since the component 2 expands the space between the holding pieces 15, there is almost no load applied to the uppermost chip component 2, and the adhesive force of the adhesive 5 ensures that the component 2 is held on the printed circuit board 3. Also in this case, since the chip component 2 does not have the clearance b with the holding piece 15, the chip component 2 can be mounted without variation.

In the above embodiment, the two holding pieces 15 are connected by the connecting portion 15A to form an integral type, but they may be divided into two and attached to the magazine body 13 independently. Further, as shown in FIG. 3, the tip of the holding piece 15 is divided into two parts, and x and y of the chip component 2 are divided.
It is also possible to eliminate the directional clearance and eliminate the variations in the x and y directions.

EFFECTS OF THE INVENTION As described above, according to the present invention, the tip end portion of the magazine main body is provided with the holders for holding the chip components protruding from the magazine main body from both sides thereof. And at least two holding pieces made of a metal plate having a spring property and projecting forward from the tip of the magazine body. The two holding pieces have a smaller gap between them toward the tip. Since the two holding pieces project forward from the tip of the magazine body and are made of a metal plate, the taper is formed so that the gap between them becomes smaller toward the tip. The chip parts can be mounted at high density.

Further, since the two holding pieces constituting the holding body have a spring property, even if there are dimensional variations due to differences in chip component parts manufacturers, or even dimensional variations between lots of the same part manufacturer, It can be mounted with high accuracy at the center of the chip pattern of the substrate.

[Brief description of drawings]

FIGS. 1a and 1b are an exploded perspective view and an assembly perspective view of a magazine for chip parts according to an embodiment of the present invention, FIGS. 2a and 2b are cross-sectional views at the time of mounting, and FIG. Perspective view of the embodiment of
FIG. 4 is a perspective view of a conventional example, FIG. 5 is a cross-sectional view of the conventional example, and FIGS. 6A and 6B are plan views showing a relationship between a pattern and a chip when chip components are mounted on a printed board. 2 …… Chip parts, 12 …… Holder, 13 …… Magazine body, 15 …… Holder.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mikio Yasuda 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Hideo Kuse, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 72) Inventor Takaaki Ozaki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Takashi Sono, 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References 55-88400 (JP, A) Actual opening Sho-58-77098 (JP, U) Actual opening 59-119095 (JP, U)

Claims (1)

[Claims] 1. A holder for holding chip components protruding from the magazine body from both sides thereof is attached to the tip of a cylindrical magazine body, and the holder holds the chip components from both sides thereof. At the same time, it has at least two holding pieces made of a metal plate having a spring property and projecting forward from the front end of the magazine body, and these two holding pieces form a taper that reduces the gap between them toward the front end. Magazine for chip parts.