JPH0710518Y2 - Square cap electrode - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is applied to the application of conductive paint or insulating paint to rectangular electronic parts such as resistors, capacitors, semiconductor elements or chip type jumper wires. The present invention relates to a rectangular cap electrode having a convenient cylindrical portion.

[Conventional technology]

With reference to FIGS. 3 (a) to 3 (c), a case of transferring a conductive paint or an insulating paint to an electronic component in the conventional example will be described.

FIG. 3 (a) is a plan view, and (b) is FIG. 3 (a) A-A '.
Sectional view (c) is a sectional view taken along the line BB 'in FIG.

In FIG. 3, the rail 22 is made of, for example, stainless steel, has step portions 23 on both sides, and is provided with a recess 24 continuous with the step portion 23.

The conveyor belt 25 is attached to the stepped portion 23 so as to be freely conveyed. The transport belt 25 is provided with an opening 26 into which the electronic component 21 is inserted. Therefore, when the electronic component 21 is inserted into the opening 26 of the conveyor belt 25, both lower ends of the electronic component 21 are supported by the rail 22.
Then, when the transport belt 25 is transported, the electronic component 21 inserted into the opening 26 of the transport belt 25 advances while rotating on the rail 22.

Further, a transfer roller 27 that rotates so as to come into contact with the rotating electronic component 21 is provided. Transfer roller
27 is, for example, a rubber roller, which can contain conductive paint, insulating paint, or the like.
Transfer to the surface of 21. For example, change the width of the transfer roller 27 to
If you match the necessary conductive film or insulating protective film,
A film having a desired width can be formed.

Next, referring to FIG. 4, a mounting state of the electronic component in the conventional example will be described.

FIG. 4 is an explanatory view of mounting a rectangular electronic component in a conventional example. In FIG. 4, 31 is a rectangular electronic component element body, and rectangular cap electrodes 32 are connected to both ends. Also the circuit board
Electrode lands 34 forming a part of a wiring pattern (not shown) are formed on 33, and the rectangular electronic component 30 is placed on the electrode lands 34 by an automatic assembly machine via cream solder. Then, when the reflow treatment is performed, the square cap electrode 32 and the electrode land 34 are electrically and mechanically connected by the solder 35.

FIGS. 5 (a) and 5 (b) are explanatory views of the rectangular cap electrode in the conventional example. The plate body 36 having a shape as shown in FIG. 5 (a) is squeezed several times by a square die. Thereafter, the open end is trimmed to form the square cap electrode 32 as shown in FIG. Then, from the opening portion 37 of the rectangular cap electrode 32, the rectangular electronic component body 31
(See FIG. 4) is inserted, and the rectangular electronic component element body 31 is electrically and mechanically connected to the rectangular cap electrode 32 without dropping from the rectangular cap electrode 32 due to friction between them.

However, the square cap electrode 32 has a problem that the cost is high because it is necessary to perform multi-stage drawing on a small-shaped portion. Further, if there is a slight variation in the working accuracy of the rectangular cap electrode 32, there is a disadvantage that the rectangular electronic component element body 31 is difficult to insert, or is easily dropped.

FIGS. 6A and 6B are explanatory views of another rectangular cap electrode in the conventional example. The structure shown in FIG. 6 is designed in order to eliminate the above-mentioned defects. After forming the cross plate 41 as shown in FIG. 6 (a), the cross plate 41 is folded at a right angle according to the dotted line. As shown in FIG. 6 (b), the contact portion 44 is formed by bending the side ends of the bent portion,
It becomes the rectangular cap electrode 42. In this case, if the thickness of the cross plate 41 is reduced, the rectangular electronic component body 31 (see FIG. 4)
The frictional force between the square cap electrode 42 and the square cap electrode 42 is weak, and not only the electrical connection between the two is weak, but also the mechanical strength is weak. On the contrary, when the thickness of the cross plate 41 is increased, the strength of the rectangular cap electrode 42 and the frictional force between the rectangular electronic component element body 31 and the rectangular cap electrode 42 are increased, but the material and the processing cost are high. Has the problem of becoming.

FIGS. 7 (a) and 7 (b) are explanatory views of another rectangular cap electrode in the conventional example.

This embodiment is designed to further increase the attachment strength between the rectangular electronic component body 31 and the rectangular cap electrode 42 shown in FIG. 6 and to reduce the processing cost. That is, the cross plate body 48 is formed into a shape in which four corners are provided with a wall portion 49 for a drawn portion 46 formed by drawing, and the central portion thereof is pressed by a rectangular die (not shown). The rectangular cap electrode 45 has a shape as shown in FIG.

The rectangular cap electrode 45 thus formed is formed with an abutting portion 47 that abuts at the side end portion of the adjacent cross-shaped plate body 41 close to the opening portion 43, and is formed on the bottom of the opening portion 43. A narrowed portion 46, which is continuous with the side end portion of the cross plate 41, is formed in the near portion.

The narrowed portion 46 shown in FIG. 7B depends on the cross-sectional area of the square cap electrode 45, but is approximately half of one side of the square cap electrode 45.
When it is set to about 1/3, the square cap electrode 45 can be narrowed down by pressing the die once.

[Problems to be solved by the device]

Rectangular electronic component including the rectangular cap electrodes 32, 42, 45
30 has a large contact area with the electrode land 34 and stability at the time of installation as compared with the round electronic component. But,
Since the rectangular electronic component 30 is a rectangular type when applying a conductive paint or an insulating paint, the transfer device of the conventional example shown in FIG. 3 cannot be used. for that reason,
A special device had to be used to transfer the conductive paint, the insulating paint or the like to the rectangular electronic component 30. Further, even if a special device is used, there is a problem that the coating of the rectangular electronic component has to be performed at a low rotation speed or intermittent rotation.

The present invention is for solving the above problems,
It is an object of the present invention to provide a rectangular cap electrode having a cylindrical portion that can be used as it is on an existing production line used for manufacturing a round electronic component.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, a rectangular cap electrode of the present invention comprises a rectangular cap electrode portion to which a rectangular electronic component element body is attached, and a cylindrical portion continuously formed on the bottom side of the rectangular cap electrode portion. Composed of and.

In addition, the rectangular cap electrode of the present invention is configured to include a narrowed portion on the bottom side and an abutting portion on the open side at the ridge line portion extending from the bottom portion to the open portion.

[Action]

In the same manner as in the conventional example shown in FIG. 7, cross plates are cut off at the four corners so as to leave a meat portion for forming the drawn portion. Then, the center of the bottom of the cross plate body is pressed by a round die smaller than the bottom to form a cylindrical portion. After that, this portion is pressed by a rectangular die larger than the cylindrical portion to form a rectangular tubular body having a cylindrical portion at the bottom. A throttle portion is formed on the bottom side of the rectangular tube. Then, since the four corners of the cross plate body are cut off, the abutting portions whose side end portions are abutted are formed on the open portion side of the rectangular tubular body. When the prismatic electronic component body is inserted into the prismatic body, the diaphragm portion and the contact portion hold the prismatic electronic component body. The holding force for holding the rectangular electronic component is determined by the length of the narrowed portion and the abutting portion, the material and thickness of the cross plate body, and the like.

The rectangular electronic component held by the narrowed portion and abutting portion of the rectangular tubular body may be coated with conductive paint or insulating paint while the cylindrical portion provided at the tip thereof is placed on a rail and rotated. it can. Therefore, the manufacturing process similar to that of the existing round electronic component can be adopted.

〔Example〕

A square cap electrode having a cylindrical portion according to the present invention will be described with reference to FIGS. 1 and 2.

As shown in FIG. 7, the four corners of the cross plate are cut off as in the conventional example. The cut-off portion is left to leave a meat portion where the narrowed portion is formed when the square-shaped press forming is performed. Then, the center of the bottom portion 2 of the cross plate body is pressed by a round metal mold (not shown) smaller than the bottom portion 2 to form a cylindrical portion. Next, the bottom portion 2 is pressed by a square die larger than the cylindrical portion 3 to form a square tubular body having the cylindrical portion 3 on the bottom portion 2. With this configuration, the narrowed portion 4 is provided on the bottom 2 side of the rectangular tubular body.
Is molded. Since the four corners of the cross plate body are cut off, the abutting portion 5 whose side ends are abutted is formed on the open portion 6 side of the rectangular tubular body.

The rectangular tubular body composed of the narrowed portion 4 and the contact portion 5 constitutes the rectangular cap electrode portion 1, and when a rectangular electronic component element body (not shown) is inserted into the rectangular cap electrode portion 1, the narrowed portion is formed. The rectangular electronic component body is held by 4 and the contact portion 5. The holding force for holding the rectangular electronic component 11 is determined by the lengths of the narrowed portion 4 and the contact portion 5, or the material and thickness of the cross plate body.

The rectangular electronic components 11 held by the narrowed portion 4 and the contact portion 5 of the rectangular tubular body are inserted one by one into the openings 15 of the conveyor belt 14. Then, the cylindrical portion 3 provided at the tip of the rectangular electronic component 11 is placed on the step portion 13 of the rail 12 shown in FIG. When the conveyor belt 14 is conveyed in such a state, the rectangular electronic component 11
Since it is conveyed while rotating, conductive paint, insulating paint or the like can be applied onto the rectangular electronic component 11 by a transfer roller as in the conventional example shown in FIG. Therefore, the manufacturing process similar to that of the existing round electronic component can be adopted.

Although the embodiment of the present invention has been described in detail above, the present invention is not limited to the above embodiment. Various design changes can be made without departing from the present invention described in the claims for utility model registration.

For example, if a gap is provided in the contact portion of the square cap electrode, the solder enters through the gap of the contact portion when soldering the square cap electrode and the electrode land of the circuit board, and the electrode land and the square cap It is possible to strongly connect the electrodes and the rectangular electronic component body.

In addition, if an opening is provided in the cylindrical portion of the square cap electrode and the lead wire is caulked from the inside of the square cap electrode by using the opening, a chip type, axial lead type or radial lead type electron is formed. A square cap electrode that can also be used for parts can be created.

[Effect of device]

According to the present invention, since the rectangular cap electrode is provided with the cylindrical portion, it is possible to use the existing manufacturing process similar to that of the conventional round electronic component, although it is a rectangular electronic component.

According to the present invention, when the rectangular electronic component is attached to the electrode land, the solder is also accumulated between the cylindrical portion provided on the rectangular cap electrode and the electrode land, so that the attachment strength of both can be further increased.

[Brief description of drawings]

FIG. 1 is an explanatory view of a rectangular cap electrode having a cylindrical portion according to the present invention, FIG. 2 is an explanatory drawing of a rectangular cap electrode having a cylindrical portion according to the present invention, and FIGS. 3 (a) to 3 (c).
Is an explanatory view of transfer of an electronic component in the conventional example, FIG. 4 is an explanatory view of mounting a rectangular electronic component in the conventional example, and FIGS. 5A and 5B are explanatory views of a rectangular cap electrode in the conventional example.
FIGS. 6 (a) and 6 (b) are explanatory diagrams of another rectangular cap electrode in the conventional example, and FIGS. 7 (a) and 7 (b) are explanatory diagrams of another rectangular cap electrode in the conventional example. 1 ...... Square cap electrode part 2 ...... Bottom part 3 ...... Cylindrical part 4 ...... Drawing part 5 ...... Contact part 6 ...... Open part 10 ...... Square cap electrode with a cylinder part 11 ...... Square type Electronic parts 12 …… Rail 13 …… Step 14 …… Conveyor belt 15 …… Opening

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-60-110190 (JP, A) JP-A-60-157295 (JP, A) Actual flat 1-86189 (JP, U) Actual flat 4- 25220 (JP, U) Actually opened Sho 62-37913 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. A rectangular cap electrode in which an end of a rectangular electronic component body is inserted and connected to a bottomed rectangular cylinder having a bottom portion and an open portion. Cap electrode part 1
And a cylindrical portion 3 that is formed on the bottom portion 2 side and that is continuous with the rectangular cap electrode portion 1, and the rectangular cap electrode. 2. A ridge line portion extending from the bottom 2 side to the open portion 6 side of the rectangular cap electrode portion 1 is provided with a narrowed portion 4 on the bottom portion 2 side and an abutting portion 5 on the open portion 6 side. The rectangular cap electrode according to claim 1, wherein