JPS6052214A - Electronic parts lead cutting method - Google Patents

Abstract

PURPOSE:To cut a lead in a form that will not be easily spilled out of a base plate, by cutting at least two pieces of the leads as making them bend in different directions each other, in regard to a method of cutting a lead leg inserted into the base plate. CONSTITUTION:A lower cutter 7 makes each cutting part 9 of its own into a square-form and as well is being tilted to a shearing direction (an arrow direction) for cutting. In this case, each of cutting parts 9 is made so as not to be paralleled with each other in design. That is to say, lines along the shearing direction are set down to symmetrical lines through which these cutting parts are tilted so as to become symmetry. Leads 2 are inserted into each hole 4 of a base plate, while the pierced-out leads 2 are further inserted into each of cutting parts 8 of a upper cutter 6 and the cutting part 9 of the lower cutter 7. Lead legs are cut off as being bent by both cutting parts 8 and 9.

Description

[Detailed description of the invention] This invention is attributable in part to a method for cutting electronic component leads.

When loading electronic components such as capacitors, resistors, or various semiconductor devices onto a printed circuit board, insert the electronic component lead into the mounting hole provided on the printed circuit board, and insert the leg part that penetrates through the 70-back restraint. It is cut to an appropriate length and then fixed at fl.1 by soldering or the like.

Figures 1 to 3 show a conventional lead cutting method, in which 1 is an electronic component, 2 is a plurality of leads, 6 is a board such as a printed circuit board, and a loading hole for inserting the leads provided in the 4-piece board 6. , 5
The cutter is composed of an upper blade 6 and a lower blade 7, and the famous sword is equipped with a blade part 8.9 that passes through the R. The leads 2ii are inserted into the respective loading holes 4 of the electronic component 1. The extracted lead 2 is then inserted into each blade part 8.9 of the famous sword 6.7. FIG. 2 shows the state at this time.

Then, while the substrate 6 and the upper blade 6 are fixed, the lower blade 7 is moved in the direction of the arrow. Then, the blade 20 is cut by sliding contact between the upper blade 6 and the lower blade 7. At this time, as shown in FIG. 6, the lead is bent in a 〈 shape along the moving direction of the lower blade 7 within the double-lead blade portion 8.

By the way, when it is cut in this way, the lead 2 is bent and separated, so the lead 2 is more difficult to come out than a lifting platform with 74 sides, and therefore the part 1
It is convenient that it does not leave group 823, but
However, as can be understood from the illustrated state, each lead 2 is bent in the same direction, so if you pull it upward along the bending direction, it may easily come out of the loading hole 4. be. It goes without saying that it is desirable to prevent such pullouts as much as possible until the lead is fixed at half 1f1.

This invention is characterized in that the leads are cut while being bent in different directions without being easily pulled out from the board.

Examples of Jin's invention will be explained with reference to FIG. 4 and subsequent figures. Note that parts given the same reference numerals as in FIGS. 1 to 6 indicate the same or corresponding parts. The upper blade 6 of the cutter 5 used in this Ij11 is not much different from the conventional one, but the lower blade 7 has each blade part 9 in a rectangular shape, and moreover, it is It is tilted. In this case, the blade portions 9#i are arranged so that they are not parallel to each other. In the example shown in the figure, they are tilted symmetrically with respect to a line along the shearing direction as a line of symmetry.

The cutting of lead 2 is the same as before, but the lead 2 is connected to the board 6.
into the loading hole 4 of. Then, the lead 2 extracted from this is further inserted into the blade part 8 of the upper blade 6 and the blade part 9 of the lower blade 7. Then, move the lower blade 7 in the direction of the arrow. Figure 5 shows the cutting process at this time in 11 straight lines. is the oblique side 9 on the back side of the blade part 9
Tangent to α. When the lower blade 7 further moves, the lead 2 moves along the oblique part 9α to J? j try to touch. Then, when the lower blade 7 is further removed, the legs of the reed are cut by the double blade portions 8.9 as shown in [C]. At this time, if the moving direction of the lower blade 7 is Pl, and the inclination direction of the oblique side portion 9α is P2, the lead 2 is bent and cut 1tJi in the direction P6, which is the composite direction of both directions F1 and P2.

Since the oblique side portions 9α of the double-edged portions 9 are inclined in four different directions, both leads are bent in a dogleg shape in different directions (see FIG. 6).

Therefore, even if a force is exerted to pull out the electronic component 1 from the board 5, at least one lead will be caught in the loading hole 4, and therefore the electronic component 1 will not be able to be pulled out by the bell.

For electronic components with 5 or more leads, it is sufficient to cut two of them according to this method, and the remaining leads can be cut using a blade with the same shape as the conventional one. .

Or, as for the remaining lead, just like the two previous htj, each one is a bit FII! Cut I+ in different directions,
(Of course, it is also possible to do this in the same manner as i. In addition, Jt) For K, it is sufficient to incline the blade portion that cuts the remaining reeds 1υ1 at different angles.

As described in detail above, according to the present invention, at least two leads of an electronic component are cut by bending them in different directions from the extracted portions while extending them to the board. Therefore, after the lead is cut, the lead gets caught in the loading hole of the board and cannot be pulled out.

[Brief explanation of the drawing]

Fig. 1 is a cutout diagram showing the solid line situation of the conventional method, Fig. 2 is a sectional view thereof, Fig. M3 is an rJr plane view after cutting, and Fig. 4 is an exploded perspective view for explaining the method according to the embodiment of the present invention. FIG. 5 is an explanation of the operation, a clear view, and FIG. 6 is a sectional view after cutting. 1,,,Electronic parts,'2,,Lead,3,
, , , Substrate , 4 , , Loading hole , 5 , , Cutter , 6 , , Upper blade , 7001 . Lower blade, 8,,, blade part, 9°. , Blade section - 'Cho Fig. 1 Fig. 2 No.

Claims (1)

[Claims] In a method for cutting at least two lead legs of an electronic component inserted into a loading hole of a board using a cutter having an upper blade and a lower blade, a blade portion of the lower blade for cutting each lead, The lower blade has different inclination angles with respect to the shearing direction. How to cut leads for 7111 child parts