JP2881953B2 - Manufacturing method of radial taping electronic components - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a radial taping electronic component automatically inserted into a printed circuit board of an electronic device by an automatic mounting machine.

2. Description of the Related Art In recent years, assembling of electronic devices has become increasingly automated, and mounting of electronic components on a printed circuit board is performed by feeding the electronic components held and held by a tape-shaped supporter to an automatic mounting machine while sequentially feeding out the same, and continuously. In general, a method of automatic mounting on a printed circuit board is generally performed.

FIG. 7 shows an example of a push button switch held on a tape-shaped support as an example of an electronic component for loading an automatic mounting machine. The push button switch 1 is held as shown in the figure by connecting the connection terminals 2 and 3 to the tape 4 for radial taping.

Conventionally, such an electronic component for loading an automatic mounting machine is manufactured by the following method. That is, FIG. 8 (a)
As shown in FIG. 3B, a case 6 is insert-molded into a continuous hoop-shaped conductive metal 5 punched into a shape as shown in FIG. 1B, and switch parts such as a movable contact plate 7, a push plate 8 and a button 9 are formed. Attach. Next, the hoop-shaped conductive metal 5 is cut to a prescribed length at positions indicated by 5a and 5b in the figure, and portions 5c and 5d of the hoop-shaped conductive metal 5 are perpendicularly downward at the center of the bottom surface of the case 6. To be the terminals 2 and 3 of the push button switch 1, respectively.

When the case 6 is automatically mounted, the case 6 is mounted on a printed circuit board while the surfaces 10 and 11 of the case 6 are held by a chuck of a mounting arm of the automatic mounting machine. The surface on which the electronic component is held is hereinafter referred to as a chuck surface. 8th
In the case shown in the figure, the case 6 is formed so that the chuck surfaces 10 and 11 form an angle of 90 degrees with the longitudinal direction of the hoop-shaped conductive metal 5, but the case 6 is formed into a shape as shown in FIG. As shown in FIG. 10, the case 6 is insert-molded on the pulled-out hoop-shaped conductive metal 12 so that the chuck surfaces 10 and 11 may be formed in parallel with the longitudinal direction of the hoop-shaped conductive metal 12. . In this case, it is mounted and held on the taping tape 4 as shown in FIG. In any case, the terminal interval between the terminals 2 and 3 is determined by the standard.
It cannot be arbitrarily changed according to the external dimensions of.

Problems to be Solved by the Invention Since a certain terminal interval is required on the taping tape 4, the chuck surfaces 10, 11 and the long direction of the hoop-shaped conductive metal 5 are 90 degrees as shown in FIG. When the case 6 is formed so as to form an angle of the angle, the intervals in the width direction of the portions 5c and 5d of the hoop-shaped conductive metal 5 corresponding to the terminal intervals are also constant. Regardless, the width of the hoop-shaped conductive metal 5 is constant and cannot be reduced, and there is a problem that the material yield cannot be improved. Further, when the terminals 2 and 3 are bent downward, a bending jig must be inserted from the lateral direction, and there is a problem that the work is not easy because the stroke is long.

Further, as shown in FIG. 9 to FIG.
When the case 6 is molded so that 1 and the longitudinal direction of the hoop-shaped conductive metal 5 are parallel, the terminals 2 and 3 are arranged in a straight line, and the width of the hoop-shaped conductive metal 5 is Although it can be made smaller, it requires a hoop-shaped conductive metal 5 twice as long as the case where the chuck surfaces 10 and 11 and the longitudinal direction of the hoop-shaped conductive metal 5 form an angle of 90 degrees. There is a problem that it is difficult to substantially improve the yield and it is not easy to handle the long hoop-shaped conductive metal 5.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a method of manufacturing an excellent radial taping electronic component which can improve the material yield and can be easily operated.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a rotation centered around a direction rotated by as small an angle as possible within a range of 0 ° <θ <90 ° from a longitudinal center line of a hoop-shaped conductive metal. Then, the case is resin-molded so that the chuck surface of the automatic taping machine is located at an equal distance from the center line, and then (or after assembling the electronic components) the part that will be the connection terminal with the external electric circuit After cutting from the hoop at the length, the center is bent at 90 degrees as specified and radial taping is performed. Furthermore, 90
By twisting the connection terminal after bending so that the terminal area in contact with the surface to which the radial tape is attached is maximized, the adhesion to the tape surface for radial taping is improved.

According to the solution to the above problem, the chuck surface of the switch case is formed at an angle θ with respect to the longitudinal center line of the hoop-shaped conductive metal. Is considered to be one side of the right angle of the right triangle, and the distance between the two conductive metal parts for the terminal on the chuck surface direction on the bottom of the case or on the center line of the case is regarded as the hypotenuse of the right triangle. When completed, this distance will be the distance between the two terminals. Conversely, if the distance between the terminals of the mounting part is fixed on the taping tape, the right triangle (one side sandwiching the right angle) / (oblique side) The distance between the two terminal components of the hoop-shaped conductive metal can be reduced in proportion. Therefore, a hoop-shaped conductive metal having a short lateral width can be used, the material yield is improved, and a jig and a tool at the time of bending can be obliquely inserted, so that the working operation is also facilitated.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings, in which the same reference numerals are given to functionally the same or equivalent parts as in the conventional example.

Embodiment 1 FIG. 1 is a perspective view of a radial taping electronic component obtained according to an embodiment of the present invention. In the drawing, symbol P indicates a distance between terminals. FIG. 2 is an exploded perspective view for explaining a method of manufacturing the radial taping electronic component. Using a hoop-shaped conductive metal 5 having a width dimension R (shown in FIG. 3) smaller than the dimension P shown in FIG. 1, the chuck surface 10 of the case 6, as shown in FIG. The case 6 is resin-molded into the hoop-shaped conductive metal 5 so that the line segment passing through the center of the 11 makes an angle θ of 0 ° <θ <90 ° with the longitudinal center line of the hoop-shaped conductive metal 5. Provided by Thereafter, the hoop-shaped conductive metal 5 is cut at 5f, 5g and 5h portions as shown in FIGS. 4 and 5, and is subjected to 90 degree bending at 5e portion as shown in FIG. The tip portion is held by the tape 4 for radial taping.
Push switch components such as the movable contact 7, the push plate 8, and the button 9 are incorporated in the case 6 and are caulked at the corners of the case 6.

As described above, according to the above embodiment, the central axis of the hoop-shaped conductive metal 5 in the longitudinal direction is 0 ° <θ <90 ° with respect to the central axes of the surfaces 10 and 11 serving as chuck surfaces of the automatic mounting machine. Since the insert molding or the outsert molding is performed at an angle as close to 0 degrees as possible within the range, the R dimension in FIG. 3 can be smaller than the specified pitch P dimension, and the material yield can be improved. Also, in the case of 90-degree bending at the portion 5e in FIG. 5, the stroke in the lateral direction can be shorter than in the conventional example, and the jig can be simplified.

Second Embodiment As shown in FIG. 4, the terminal of the radial taping component of the first embodiment is further twisted at a portion 5e, so that the contact area with the radial taping tape 4 is improved, and the holding stability of the electronic component with respect to the tape 4 is improved. Can be obtained.

Advantageous Effects of the Invention As is clear from the above embodiment, the present invention has an advantage that the center line in the longitudinal direction of the hoop-shaped conductive metal is 0 degree <θ <90 degree with respect to the axis passing through the centers of both chuck surfaces of the automatic mounting machine. A terminal portion for maintaining electrical connection with a pair of external parts, which is a part of a component element of the hoop-shaped conductive metal because the resin is molded at an angle as close to 0 degrees as possible within the range of The center-to-center pitch can be made smaller than the specified pitch for radial taping automatic mounting, which improves the material yield and allows the bending jig stroke to be the same as that of the conventional bending process even when the terminal is bent 90 degrees after molding. In this case, it is necessary to insert a punch or the like of a processing jig from the lateral direction, and the stroke is long, so that a large amount of labor is required in assembling and assembling jigs. thing Thus, the stroke can be short, and the jig can be simplified.

[Brief description of the drawings]

1 is an external perspective view of a radial taping electronic component manufactured according to one embodiment of the present invention, FIG. 2 is an exploded perspective view of the electronic component in one manufacturing process of the present invention, and FIG. 3 is a hoop used in the present invention. FIG. 4 is a plan view showing the relationship between the position and the angle of the electronic component case and the hoop-shaped conductive metal, FIG. 5 is a view showing the 90-degree bending position of the terminal of the electronic component, FIG. 6 is an external perspective view of an electronic component of another embodiment, FIG. 7 is an external perspective view of an electronic component obtained by a conventional manufacturing method, and FIG. 8 (a) is a plan view of a conventional hoop-shaped conductive metal. FIG. 8 (b) is an exploded perspective view of an electronic component in a conventional manufacturing process, FIG. 9 is a plan view of another example of a conventional hoop-shaped conductive metal, and FIG. Plan view showing a positional relationship with a hoop-shaped conductive metal,
FIG. 11 is a perspective view showing a relationship between a bent terminal of a conventional electronic component and a taping tape. 1 ... push button switch (electronic component), 2, 3 ... connection terminal,
4 ... tape for radial taping, 5 ... conductive metal hoop, 6 ... case (electronic component body), 10, 11 ...
Chuck surface (electronic component holding surface).

Claims (2)

(57) [Claims] 1. A radial taping at an equal distance from a central axis which forms an angle greater than 0 degree and less than 90 degrees with respect to the central axis in the longitudinal direction of the continuous hoop-shaped conductive metal. The hoop-shaped conductive metal is resin-molded on the hoop-shaped conductive metal so that the holding surface of the electronic component of the automatic mounting machine is located. After the resin is formed, the hoop-shaped conductive metal is cut at an appropriate position to form connection terminals. And a method of manufacturing a radial taping electronic component in which the connection terminals are held on a tape for radial taping. 2. A method for manufacturing a radial taping electronic component according to claim 1, wherein the connection terminal of the electronic component is twisted to hold the connection terminal to a radial taping tape with a maximum contact area.