JPH0734027B2 - Terminal device for measuring the characteristics of chip parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a terminal tool used in a characteristic measuring device for measuring the electrical characteristics of a chip component.

[Prior Art] Chip components such as chip capacitors and chip resistors are widely used due to their advantages such as compactness, high density, high reliability, and suitability for automatic mounting. In the case of this type of chip component, it is necessary to measure its electrical characteristics and perform quality inspection before mounting it on a substrate. Therefore, conventionally, a characteristic measuring device as shown in FIG. 6 has been used.

That is, the turntable 50 is provided with a large number of stepped holding holes 52 for holding the chip component 51 at a constant pitch, and the fixed side terminal 53 and the movable side terminal 54 are provided on both sides of the turntable 50. They are placed close together. A plurality of the fixed side terminals 53 and the movable side terminals 54 are arranged at the same pitch as the holding holes 52 of the turntable 50. The movable terminal 54 is a slider 55 that can move in the approaching / separating direction of the turntable 50.
It consists of a pin terminal slidably supported on the
56 is urged to project toward the turntable 50. A turntable is provided at one end of the movable-side terminal 54.
A small-diameter shaft portion 54a that can be inserted into the small-diameter portion 52a of the holding hole 52 of the 50 is formed. The other end of the movable side terminal 54 is connected to a measuring device (not shown) via the wiring 57, and the fixed side terminal 53 is also connected to this measuring device.

When measuring the characteristics of the chip component 51, the slider 55 is moved to the left in FIG. 6, the shaft portion 54a of the movable side terminal 54 is inserted into the holding hole 52, and is pressed against one end surface of the chip component 51. The chip part 51 is pushed by the movable side terminal 54, and the other end surface of the chip part 51 contacts the fixed side terminal 53, so that the chip part 51 is electrically connected to the measuring device, and the characteristics can be measured.
After the measurement is completed, the slider 55 is retracted to the right in FIG. 6, the movable side terminal 54 is separated from the chip part 51, and the turntable 50 is rotated by one pitch in the arrow direction. Measure.

[Problems to be Solved by the Invention]

In the case of the above characteristic measuring device, since the movable side terminal 54 is a pin terminal, it is necessary to attach components such as the spring 56, the number of components is large, and the size of these components causes the terminal to be There is a drawback that the inter-pitch P becomes large. In particular, when a large number of movable side terminals 54 are arranged in an arc shape in order to measure the characteristics of a large number of chip parts 51 at a time, the number of chip parts 51 that can be measured at one time is restricted, There is a problem of poor processing capacity. Further, in order to prevent the chip part 51 from dropping from the holding hole 52 when the movable side terminal 54 separates from the chip part 51, the holding hole 52 must be formed in a stepped shape, and the movable side terminal 54 has Shaft portion 54a inserted into the small diameter portion 52a of the holding hole 52
Must be formed. Particularly, as the chip component 51 becomes smaller, the holding hole 52 and the small diameter portion 52a become smaller, and the shaft portion 5
Molding of 4a becomes difficult. Further, the shaft portion 54a is the chip component 51.
Since it comes into pressure contact with the end surface of the chip in a small area, the chip component 51 may be damaged.
Since an extra stroke for passing through the small diameter portion 52a is required, the measurement processing speed becomes slow.

Therefore, the present invention is to provide a terminal device for measuring characteristics of a chip component, which solves the above problems.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is characterized in that one end surface of a chip component held in a holding hole of a movable table is elastically contacted and the other end surface of the chip component is pressed and biased to a fixed side terminal. In the measuring terminal device, a plurality of electrodes are arranged on a support plate, and the movable side terminals are supported so that the electrodes are connected to the plurality of movable side terminals at least having a conductive leaf spring. It is characterized by being fixed to a plate.

〔Example〕

1 to 3 show a first characteristic measuring device using the present invention.
An example is shown.

A motor 2 capable of intermittent operation at fixed rotation angles is fixed to the support base 1, and a disc-shaped turntable 4 made of an insulating material is fixed to the tip of a rotation shaft 3 thereof. A plurality of holding holes 5 are formed in an arc shape at a constant pitch in the vicinity of the outer peripheral portion of the turntable 4, and the holding holes 5 are formed as through holes that penetrate the front and back surfaces of the turntable 4. A chip component 6 is penetratingly held in each of the holding holes 5, and electrodes 6a and 6b formed at both ends including the end surface of the chip component 6 project from the holding hole 5.

A fixed side printed circuit board 7 is arranged on one side of the turntable 4, and the fixed side printed circuit board 7 is fixed to a fixed base 9 via a spacer 8. As shown in FIG. 1, the fixed-side printed circuit board 7 has a plurality of fixed-side terminals 11 corresponding to the holding holes 5 arranged in an arc on the surface of an insulating substrate 10 made of glass epoxy resin or the like, and each terminal 11 To a through hole 12 for external connection are connected by a pattern wiring 13.

On the other side of the turntable 4, the characteristic measuring terminal device of the present invention is provided.
14 are arranged, and this terminal tool 14 is composed of a plurality of movable-side terminals 16 held by a resin terminal block 15 and a printed board 17 which is a support plate. The movable terminals 16 are composed of strip-shaped metal leaf springs having conductive plating on their surfaces, and a plurality of terminals (4 in the drawing) are not in contact with each other and the terminal block 15 is provided.
It is fixed in a fan shape. The manufacturing method of the movable side terminal 16 is
As shown in FIG. 4, the movable side terminals 16 are press-molded from a metal plate in a state of being connected by the lead frame 41, and the slits 42 are formed between the movable side terminals 16. This slit 42
Has a narrow portion along the locus along which the chip component 6 moves, and prevents the chip component 6 from falling off the turntable 4 and being caught. Then, after the terminal block 15 is resin-molded as shown by the broken line in FIG. 4, it may be cut at the position shown by the alternate long and short dash line. In addition,
Holes 43 for screw insertion are formed in advance in the movable side terminals 16 on both sides and the terminal block 15 corresponding thereto.

On the other hand, the printed board 17 has contact pins 19 which are a plurality of electrodes on the surface of an insulating board 18 made of glass epoxy resin or the like.
Are arranged and fixed in an arc shape, and the contact pins 19 to the through holes 20 for external connection are connected by the pattern wiring 21. The peripheral portion of the printed circuit board 17 has a support 1
It is fixed to the spacer 44 fixed to the bolt with bolts 45. When the terminal block 15 is fixed to the printed board 17 with the screw 22, the outer periphery of the movable side terminal 16 is contact pin 19.
Then, the movable side terminal 16 and the contact pin 19 are electrically connected to each other. In this embodiment, four terminal blocks 15 are fixed to the printed circuit board 17 to form 16 movable terminals 16. However, the printed circuit board may be formed depending on the number of terminals 16 attached to one terminal block 15. The number of terminal blocks 15 attached to 17 can be changed appropriately. Also, the number of terminals 16 can be changed appropriately according to the characteristics to be measured. The movable side terminal 16 is one end electrode 6b of the chip component 6 held in the holding hole 5 of the turntable 4.
Can be elastically contacted with the fixed terminal 11 by pressing the other end electrode 6a of the chip component 6 with this contact pressure.

In addition, when the spring force of the movable side terminal 16 is insufficient,
The reinforcing spring piece 46 may be fixed to the spacer 44, and the back of the movable side terminal 16 may be supported by the insulating protrusion 46a at the tip of the spring piece 46.

A connector 23 can be connected to the through holes 12 and 20 provided on the fixed-side printed circuit board 7 and the printed circuit board 17, and the connector 23 is connected to input / output portions of a plurality of types of measuring equipment (not shown). That is, the fixed side terminals that face each other
Each pair of 11 and movable-side terminal 16 is connected to a measuring device, and by rotating the turntable 4 by one pitch, it is possible to measure various kinds of characteristics with respect to one chip component 6. Functions of each terminal include, for example, a C measurement terminal, a voltage application terminal, an IR measurement terminal, and the like.

A hook having a C-shape when viewed from the front is provided on the inner peripheral end of the movable terminal 16.
24 is engaged, and the hook 24 is connected to the two slide shafts 26 via the hook mounting plate 25. The slide shaft 26 is slidably guided back and forth by a slide bearing 27 attached to the support 1, and the rear ends of both slide shafts 26 are connected by a stay 28 as shown in FIG. A tension spring is placed between the bolt 29 fixed to both ends of the stay 28 and the bolt 30 fixed to the slide bearing 27.
31 is stretched. A cam follower 32 is rotatably attached to the center of the stay 28, and the cam follower 32 is in contact with the cam 33 by the spring force of the tension spring 31.

When the cam 33 rotates and the stay 28 moves backward against the tension spring 31, the hook 24 also moves backward together with the stay 28. As a result, the movable-side terminal 16 is bent and separated from the end surface of the chip component 6, so that in this state the turntable 4
Can be easily rotated. At this time, since there is only a small gap between the movable side terminals 16, the chip part 6 does not get caught between the movable side terminals 16 and the moving stroke of the hook 24 is small. Does not fall from the holding hole 5. The cam 33 rotates and stays
When 28 moves forward, the tension spring 31 moves the hook 24 leftward in FIG.
16 contacts the chip component 6. Chip parts 6
By sequentially changing the contact positions of the movable side terminal 16 and the fixed side terminal 11 with each other, it is possible to measure various kinds of characteristics.

In the lowermost holding hole 5a of the turntable 4, as shown in FIG. 1, one chip component 6 is supplied from the chip component supply feeder 34.
A plurality of (for example, six) holding holes 5b on the front side in the rotation direction of the holding holes 5a are provided with a sorting mechanism 35 for sorting and discharging. The sorting mechanism 35 includes an arc-shaped mounting frame 36 that is arranged in proximity along the holding hole 5 of the turntable 4 as shown in FIG.
A plurality of discharge pipes 37 that are fixed in a penetrating manner to each other and a tube 38 connected to each discharge pipe 37 are provided, and the tips of the tubes 38 are inserted into separate housing boxes 39, respectively. On the other hand, a plurality of nozzles 40 are arranged close to the other side of the turntable 4 facing the discharge pipe 37. By sucking or ejecting air from each nozzle 40, the chip component 6 can be adjusted according to its characteristics. It can be sorted out and discharged into a separate storage box 39. For example, when the chip component 6 held in the predetermined holding hole 5 of the turntable 4 is to be discharged into the storage box 39, air is jetted from the nozzle 40 at the corresponding position and the chip component 6 is discharged from the discharge pipe 37 into a tube. 38 through storage box 39
It can be discharged to. Further, when it is not necessary to discharge the chip component 6 in the holding hole 5 into the storage box 39, air is sucked from the nozzle 40 corresponding to the holding hole 5 so that the chip component 6 is not discharged into the wrong storage box 39. You can do this.

According to the present embodiment, the inner end of the movable terminal 16 is hooked by the hook 24.
Since the movable side terminal 16 is brought into contact with and separated from the chip component 6 by being bent by, the pattern wiring 21 and the connector 23 do not move even if the movable side terminal 16 is displaced, and the stray capacitance or There is an advantage that impedance changes are small and stable measurement can be performed. Also, since the movable side terminal 16 is a metal leaf spring, it has outstanding durability, and
It is easy to replace only the movable side terminal 16 by removing 22. Further, when the plating of the contact surface of the movable side terminal 16 with the chip component 6 is worn, there is an advantage that the movable side terminal 16 can be reused by attaching it to the printed board 17 upside down.

FIG. 5 shows a second embodiment of the present invention, in which the entire printed circuit board 17 including the movable side terminal 16 is moved in order to bring the chip part 6 and the movable side terminal 16 into contact with each other. In this case, not only the hook 24 but the movable terminal
The printed circuit board 17 supporting the 16 is also fixed, and the inner peripheral end of the movable terminal 16 is held by the hook 24 in a slightly bent state.
Also in this case, the leaf spring 46 may be arranged behind the movable side terminal 16 in order to compensate for the lack of elasticity of the movable side terminal 16. Note that the hook 24 is not essential in this embodiment.

In the case of this embodiment, compared with the first embodiment, the movable side terminal
Since the amount of bending of 16 can be reduced, there is an advantage that the durability of the movable side terminal 16 can be improved.

It is needless to say that the terminal device of the present invention is not limited to those of the above-described embodiments, and can be changed as appropriate without departing from the scope of the invention.

For example, the movable-side terminal 16 is not limited to being fixed to the printed board 17 that is a support plate after being held by the terminal block 15, but may be directly attached to the support plate.

The electrodes formed on the support plate are not limited to the contact pins, but may be formed by printing or the like. In this case, the movable terminal can be directly connected and fixed to this electrode by using solder or the like.

The connection between the electrodes of the printed circuit board, which is the support plate, and the measuring device may be made directly by lead wires or the like, not by way of the pattern wiring formed on the printed circuit board.

The support plate is not limited to the printed circuit board.

The movable side terminal may be a leaf spring having conductivity on at least the surface, and is not necessarily made of metal.

Further, the movable side terminals are not limited to being arranged in a circular arc shape on the support plate, but may be linearly arranged. In this case, the movable table also needs to be a linear movement type.

〔The invention's effect〕

As is clear from the above description, according to the present invention, at least the surface of the movable-side terminal is formed of a leaf spring having conductivity,
Since the movable side terminals are pressed against the end faces of the chip parts by the spring force of the movable side terminals, the number of constituent parts can be significantly reduced as compared with the conventional pin terminal method, and a large number of movable side terminals can be arranged at high density. Therefore, the measurement processing capability is remarkably improved as compared with the conventional case.

Further, since the movable side terminal can be brought into surface contact with the end surface of the chip part, the impact applied to the chip part at the time of contact between the chip part and the movable side terminal is small, and damage to the chip part is reduced.

Further, since the movable terminals can be arranged close to each other with a small gap therebetween, even if the holding hole of the movable table is simply a through hole, the chip component does not drop out from the holding hole. That is, it is sufficient to hold the chip component in the holding hole of the movable table in a state where both end surfaces of the chip component are exposed, and the moving stroke of the movable side terminal can be made smaller than in the conventional case. Therefore,
There is an advantage that the measurement processing speed can be dramatically improved.

Also, since the movable side terminal and the support plate are configured separately, only the movable side terminal can be easily replaced even if the movable side terminal wears, and the connection wiring from the movable side terminal to external measuring equipment is also possible. When the wiring pattern is formed by the pattern wiring of the printed circuit board, a large number of wirings can be efficiently arranged and a highly reliable terminal tool can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a measuring device using a first embodiment of a characteristic measuring terminal device according to the present invention, FIG. 2 is a partial sectional side view thereof, and FIG. 3 is III- of FIG. A sectional view taken along line III, FIG. 4 is a front view showing the middle of manufacture of the movable side terminal, FIG. 5 is a side view of a main part of the second embodiment, and FIG. 6 is a sectional view of a conventional example. 4 ... Turntable (movable table), 5 ... Holding hole, 6 ... Chip parts, 11 ... Fixed side terminal, 14 ... Characteristic measuring terminal device, 15 ... Terminal block, 16 ... Movable side terminal , 17 ...
… Printed circuit board (support plate), 19 …… contact pin (electrode), 20 …… through hole (external connection part), 21 …… pattern wiring, 23 …… connector, 24 …… hook.

Claims (1)

[Claims] 1. A characteristic measuring terminal device which elastically contacts one end surface of a chip component held in a holding hole of a movable table and presses and urges the other end surface of the chip component to a fixed side terminal. A plurality of electrodes are arranged on the support plate, and the movable side terminals are fixed to the support plate so that the electrodes are connected to the plurality of movable side terminals at least having a surface spring having conductivity. A terminal tool for characteristic measurement of the characteristic chip parts.