JPH0124632Y2 - - Google Patents

Description

[Detailed description of the invention] A. Field of industrial application This invention relates to a characteristic measuring device for axial lead type electronic components such as diodes.

B. Prior Art Electronic components such as diodes and resistors are generally of the axial lead type, in which lead wires are led out along the axis of the component body from both ends of the component body. Lead wires made of magnetic metal such as Fe-Ni alloy are often used for the lead wires, and axial lead type electronic components are designed to prevent oxidation on the surface of the magnetic lead wires and improve solderability with external devices. The product is soldered and plated for various purposes such as measurement of characteristics, stamping, etc., and then completed as a product.

Conventionally, characteristic measurements of such axial lead type electronic components have been carried out one by one using, for example, the apparatus shown in FIGS. 4 to 6. That is, in FIGS. 4 to 6, 1, 1, . . . are axial lead type electronic components, 2 is a rotating drum pivotally installed in a fixed position, and 3 is a rotating drum 2 in which electronic components 1 are supplied one by one. An electronic component supply section 4 takes out the measured electronic components 1 one by one from the rotating drum 2; 5, 5 a measurement unit fixedly arranged at two fixed measurement positions near the outer periphery of the rotating drum 2; Terminal 6 is a characteristic measuring device electrically wired to the measurement terminals 5, 5.

As is clear from FIG. 6, a groove 7 is formed in the center of the outer circumference of the rotating drum 2, and the groove 7 is large enough to accommodate the component main body 1a of the electronic component 1. On the outer circumferential surface on both sides of this groove 7, a plurality of grooves are formed at equal intervals. granular magnets 8, 8... are buried. One magnet 8 has a size that magnetically attracts one lead wire 1b of the electronic component 1, and one electronic component 1 is arranged so that the component main body 1a is in the groove even in the axial direction parallel to the axial direction of the rotating drum 2. Near the bases of the two lead wires 1b, 1b fitted in the groove 7 are attracted by a pair of magnets 8, 8 on both sides of the groove 7, and rotate together with the rotating drum 2. The electronic component supply unit 3 that supplies the electronic components 1 to the rotating drum 2 is, for example, a magnetic feeder, and in this magnetic feeder, a large number of electronic components 1, 1, . . . are fed to the rotating drum 2 while being horizontally regulated. The pieces that reach the rotating drum 2 are successively cut out one by one by the attraction of the magnets 8, 8, . . . .

The two measurement terminals 5, 5 are electrically connected to the lead wires 1b, 1b of the electronic components 1, 1, . In the drawing, two are provided, but one or more may be provided depending on the type of electronic component 1 and the content of characteristic measurement. Since these two measurement terminals 5, 5 have the same structure, only one will be explained below. The measurement terminal 5 is composed of two fixed terminals 5a and 5b which are fixedly arranged at an interval slightly smaller than the diameter of the lead wires 1b and 1b from the outer periphery of both sides of the groove 7 of the rotating drum 2.
When the electronic component 1 is attracted to the outer periphery of the rotating drum 2 and sent to the measurement position, the electronic component 1
The two lead wires 1b, 1b are fixed terminals 5a, 5
At this time, a voltage is applied between both fixed terminals 5a and 5b, and the characteristic of the electronic component 1 is measured by the characteristic measuring device 6.

The electronic component extraction section 4 removes the measured electronic component 1, which rotates together with the rotary drum 2, from the rotary drum 2 using, for example, cutting claws 9 disposed on both sides of the lower part of the rotary drum 2, and removes the measured electronic component 1 from the rotary drum 2. This is for taking out to an electronic component selection mechanism, etc.

C. Problems to be Solved by the Invention In the conventional device described above, the characteristics of the axial lead type electronic component 1 are measured using the lead wires 1b and 1b of the electronic component 1 rotating together with the rotating drum 2 and the fixed terminal 5.
Since it is carried out in a state in which the parts a and 5b are slid in light contact with each other, the following problems are involved.

The lead wires 1b, 1b of the electronic component 1 have a solder coating on their surfaces by solder plating. Therefore, when the lead wires 1b, 1b are strongly pressed and slid against the fixed terminals 5a, 5b in order to make good contact, the solder coating of the lead wires 1b, 1b is removed from the fixed terminals 5a, 5b.
Fixed terminals 5a, 5b peel off due to rubbing by a, 5b
It sometimes adhered to the surface. Fixed terminal 5 like this
When solder adheres to a and 5b, the contact resistance with the lead wires 1b and 1b of the electronic component 1 changes thereafter, making it impossible to measure characteristics under uniform conditions, resulting in a problem of lack of reliability.

As a solution to the above problem, fixed terminals 5a and 5b
Solder adhering to the device is removed periodically. However, this method has the problem that the entire device must be stopped every time the solder is removed, which reduces the operating rate of the device and shortens the life of the fixed terminals 5a and 5b.

Furthermore, in the electronic component 1, the lead wires 1b, 1
Since the solder film b is partially peeled off, there is a high probability that the solder finish will be defective as a result, which is a factor that lowers the commercial value of the product.

D. Purpose of the invention The present invention was made in view of the above-mentioned conventional problems, and the purpose of the present invention is to bring measurement terminals into contact without peeling off the solder coating of the solder-plated lead wires of axial lead type electronic components. The objective is to perform characteristic measurements.

E. Structure of the invention The technical means of the invention to accomplish this purpose is to make the measurement terminal movable. Specifically, this technical means involves placing magnets on the outer periphery of a rotating drum that magnetically attracts lead wires of electronic components at fixed positions near the outer periphery of the drum, and rotating the drum around an eccentric point slightly away from the center point. In the same direction as the drum, when the peripheral surface farthest from the center of rotation comes to the rotating drum side, it rotates at the same peripheral speed as the rotating drum, and connects the lead wires of electronic components on the outer periphery of the rotating drum to the rotating drum. The method is to use a movable measurement terminal that can be held appropriately.

F. Effect of the invention By using the movable measuring terminal described above, the lead wire of the electronic component is only pressed by the measuring terminal and is not rubbed. Therefore, even if there is a solder coating on the surface of the lead wire, it is not affected by the measuring terminal. There is no need to worry about it being peeled off, and the above-mentioned problems of the prior art are solved. In addition, since the measurement terminal rotates around an eccentric point, it comes into contact with the lead wire only when the electronic component comes to the measurement position, and does not come into contact with the lead wire or rotating drum at other times, reducing wear on these parts. Become.

G. Example of the invention An example of the invention will be described with reference to FIGS. 1 and 2.

In FIG. 1, the same components as those in FIG. 4, which shows a conventional device, are given the same reference numerals and their explanation will be omitted. The characteristic measuring device of this embodiment differs from conventional devices in the following movable measuring terminals 10, 10 arranged at, for example, two measuring positions near the outer periphery of the rotary drum 2 and their supporting means. Since the two measurement terminals 10, 10 and their support means have the same structure, one will be explained below.

First, the measurement terminals 10 are fixed on both sides of the periphery of two insulating rotary rollers 11, 11 which are rotatably arranged at one fixed measurement position, and a total of four movable terminals 10a to 10d as shown in FIG. Consists of. The two rotating rollers 11, 11 are circular, and each is connected to a rotating shaft 12 centered at an eccentric point slightly apart from its center point p, and rotates eccentrically. These rotating rollers 11, 11 are opposed to the outer peripheries on both sides of the groove 7 of the rotating drum 2, and rotate synchronously in the same direction as the rotating drum 2 at the same circumferential speed. The four movable terminals 10a to 10d are fixed to both sides of each rotating roller 11, 11, respectively.
The outer periphery of the rotary rollers 11 forms a part of the outer periphery of the rotating rollers 11, 11. A total of four electrode terminals 14, 14... supported by spring members 13, 13... from one direction are always slidably and elastically in contact with the periphery of both side surfaces of each rotating roller 11, 11, rotating roller 11,
When the movable terminals 10a to 10d come to the rotating drum 2 side by rotation 11, each electrode terminal 14, 14... electrically contacts the corresponding movable terminal 10a to 10d.
Each electrode terminal 14, 14... is wired to the characteristic measuring device 6', and the electrode terminal 14, 14... and the movable terminal 10a
10d, the characteristics of one electronic component 1 at the measurement position are measured in the following manner.

The minimum distance between the rotating rollers 11, 11 and the rotating drum 2 is slightly smaller than the wire diameter of the lead wires 1b, 1b of the electronic component 1, and the maximum distance between the rotating rollers 11, 11 is slightly smaller than the wire diameter of the lead wires 1b, 1b.
When one electronic component 1 magnetically attracted to the outer periphery of the rotating drum 2 reaches the measuring position, the movable terminals 10a to 10d are connected to the rotating drum 2 at the same timing. The two movable terminals 10a, 10b are rotated to the position with the minimum distance facing each other, and the lead wire 1b is connected to the single lead wire 1b.
The other movable terminals 10c, 10 are placed at two points near the base of
d simultaneously contacts two points near the base of the other lead wire 1b. This contact is made with each movable terminal 10a~
10d and the lead wires 1b, 1b are moved at the same speed, each movable terminal 10a to 10d is connected to the lead wire 1.
The electrode terminals 14, 1b are gradually held firmly between the outer periphery of the rotating drum 2, and when sufficient electrical contact is made, the characteristics measuring device 6' measures the electrode terminals 14, 1b.
14..., a voltage is applied between both lead wires 1b, 1b via the movable terminals 10a to 10d, and the electronic component 1
Characteristic measurements are performed. After the measurement is completed, the movable terminals 10a to 10d gradually separate from the lead wires 1b and 1b without sliding even as the rotating drum 2 and the rotating rollers 11 and 11 rotate.

Note that the present invention is not limited to the above-mentioned embodiments, but particularly the number of movable terminals in the movable measuring terminal, their supporting means,
Various changes can be made to the electrical connection means with the characteristic measuring device.

H. Effects of the invention As described above, according to the invention, even if the lead wire of an electronic component has a solder coating, there is no need to worry about the solder coating being peeled off by the measurement terminal and adhering to the measurement terminal. By equalizing the contact resistance between the wire and the lead wire, it is possible to equalize the conditions for measuring the characteristics of electronic components, and we can provide a highly reliable characteristic measuring device.
Furthermore, since no solder adheres to the measurement terminals, the solder removal work can be omitted, improving the operating rate of the device and extending the life of the measurement terminals. Furthermore, since damage caused by contact between the lead wire and the measurement terminal is reduced, the incidence of defective solder finish of the lead wires of electronic components is reduced, and the commercial value of the electronic components can be improved. Furthermore, since the measurement terminal rotates around an eccentric point, it does not come into contact with any rotating drum or the like other than the lead wires of electronic components, so wear on these components is significantly reduced, improving operating efficiency and extending life.

[Brief explanation of the drawing]

FIG. 1 is a side view of the main parts of an electronic component characteristic measuring device showing an embodiment of the present invention, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 4 and 5 are a side view and a plan view of a main part of a conventional axial lead type electronic component characteristic measuring device, and FIG. 6 is a sectional view taken along line A-A in FIG. 4. It is an enlarged sectional view. 1...Electronic component, 1a...Component body, 1b...
Lead wire, 2... Rotating drum, 8... Magnet, 10
...Measurement terminal, 10a to 10d...Movable terminal, 1
1... Rotating roller, 14... Electrode terminal.

Claims (1)

[Scope of Claim for Utility Model Registration] A characteristic measuring device for an electronic component in which lead wires are led out from both ends of the component body along the axial direction of the component body, wherein magnets for magnetically attracting the lead wires of the electronic component are arranged at regular intervals around the outer circumference. A rotary drum having a plurality of rotary drums and rotating at a fixed position; When the circumferential surface farthest from the eccentric point comes to the rotating drum side, the lead wire of the electronic component rotated at the same circumferential speed as the rotating drum and adsorbed on the outer circumference of the rotating drum is appropriately clamped with the rotating drum. What is claimed is: 1. An electronic component characteristic measuring device comprising: a measuring terminal for supplying current to a lead wire;