JPS63138676A - Terminal for regulating resistor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a terminal for an adjustable resistor suitable for use in mounting a cylindrical adjustable resistor on a printed circuit board, and in particular,
This invention relates to a terminal for adjusting resistors that can improve the mounting density of printed circuit boards and automate soldering work.

[Prior art]

In general, each of diodes, transistors, integrated circuits, etc.!
! When electronic components are mounted on a printed circuit board, the iJ4giJ resistors are mounted all at one place on the printed circuit board in order to adjust voltage errors and the like of each electronic component.

Therefore, FIG. 15 shows an example in which a conventional adjustment resistor is mounted on a printed circuit board.

In the figure, l indicates a printed circuit board, and a printed wiring (not shown) having a predetermined pattern is formed on the printed circuit board 1. In the middle of this printed wiring, for example, a diode, a transistor, an integrated circuit, etc. Electronic components (not shown)
is now installed. Then, in order to adjust the voltage error of each electronic component, the milk printed circuit board l is formed with a small hole for mounting 2X8I resistors at one place, and each mounting part 2 is formed with a small hole. It is designed to be connected to each electronic component via printed wiring.

It is formed in the shape of a gourd of about 6a+I11, and bottle-shaped glue boards 3A, 3A of a predetermined size are protruded from both ends thereof. The diameter of each lead 3A is 1, for example 0.
．． It is formed with a small diameter of about 5 mm.

4.4 indicates a terminal for attaching each adjustment resistor 3 to a printed circuit board l, each terminal material 4 is formed of conductive gold iris, and has a base 4A having a substantially U-shaped cross section; A pair of arm portions 4B, 4 formed by bending so as to extend to both sides of the base portion 4A in a substantially V-shape.
B, and a terminal pin 4C that integrally projects downward from the lower end side of the base 4A, and the terminal pin 4C of each terminal 4 is installed in the small hole of each mounting portion 2, and soldering is done by etc. It is fixed. Each adjustment resistor 3 is inserted into the terminal 4 in the direction of the arrow in the figure 815, and each lead 3A of each adjustment resistor 3 is connected to each base 4A and each arm 4B.
It is designed to be latched between.

The prior art has the above-mentioned configuration, in which each lead 3A of each adjusting resistor 3 is latched between the base 4A of each terminal 4 and each arm 4B, and is soldered to the corresponding part by soldering or the like. It is designed to be fixed. In this way, each adjustment resistor 3 mounted on the printed circuit board 1 adjusts the voltage error of each electronic component, and supplies a predetermined voltage to each electronic component.

[Problem that the invention attempts to solve]

However, the above-mentioned conventional technology has the following drawbacks.

First, since each lead 3A is provided on both ends of the adjustment resistor 3, the overall length becomes long, and it is necessary to take a large interval between each terminal 4, which takes up a relatively large area on the printed circuit board l. Therefore, it is impossible to increase the mounting density of each electronic component on the printed circuit board 1. In addition, when each terminal 4 has each adjustment resistor 3 attached, the base 4A etc. protrudes unnecessarily from the printed circuit board 1 more than each adjustment resistor 3, and when the printed circuit board 1 is attached to a control panel etc. It takes up an unnecessarily large amount of space. Each lead 3A of each adjustment resistor 3 protrudes greatly in the axial direction,
In addition, since it is formed to have a small diameter, it is likely to be misaligned in the axial direction with respect to each terminal 4, making it difficult to automate soldering.

In order to solve the above-mentioned drawbacks, it has recently been proposed to use a Melf resistor 10 as shown in FIG. 1, which will be described later, in place of the adjustment resistor 3.

The terminal for attaching the MELF resistor lO on the printed circuit board l is almost the same as the terminal 4 mentioned above, and there are problems such as the inability to increase the mounting density and the difficulty of automating soldering etc. There is.

The present invention has been made in view of the above-mentioned drawbacks of the prior art.The present invention makes it possible to automatically attach a cylindrical adjustment resistor such as a Merck resistor, automate soldering, etc. The present invention provides an adjustment resistor terminal that can significantly improve the mounting density, etc.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides an adjustment resistor formed of a conductive metal plate in order to mount an adjustment resistor formed in a cylindrical shape and provided with electrodes on the outer periphery of both ends on a printed circuit board. a resistor terminal, a holding part formed in a downwardly concave curved shape with an arc corresponding to the electrode-side outer circumferential surface of the adjustment resistor, and having an open upper end side;
A configuration is adopted in which a terminal pin is located below the holding portion, protrudes downward, and is attached to the printed circuit board.

(Function) Since the holding part with an open upper end is formed in a downwardly concave curved shape with an arc corresponding to the outer circumferential surface of the adjusting resistor on the electrode side, the electrode side of the adjusting resistor can be easily inserted into the holding part from above. Not only is this possible, but when the electrode side is mounted within the clamping part, the contact area between the clamping part and the electrode can be increased, and the positioning of the adjustment resistor becomes easier.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 14. In this embodiment, the same components as those of the prior art shown in FIG. 15 described above are denoted by the same reference numerals, and the explanation thereof will be omitted.

1 to 3 show a first embodiment of the invention.

In the figure, reference numeral 10 indicates a Melf resistor as an adjustment resistor formed in a cylindrical shape. Electrodes 10A and IOA are provided on both end sides in the direction over the entire circumference, respectively.

Reference numeral 11.11 indicates terminals for mounting the MELF resistor 10 on the printed circuit board 1, and each terminal 11 is made by bending a conductive metal plate, for example, a thin plate of copper or the like, using a means such as bending processing. They are arranged on the printed circuit board 1 at a predetermined distance in the direction of the axis q of the MELF resistor 0, that is, a distance corresponding to the distance between the electrodes 10A. Here, each terminal 11 is formed in a downwardly concave curved shape with an arc corresponding to the outer circumferential surface of the electrode 10A, and is located on the upper end side, the holding part 11A, and the bottom side of the holding part 11A. In order to impart springiness to the holding portion 11A,
A bent part 11B as a notch formed by bending into a U-shape, and a small convex curved shape located on both sides of the upper end of the holding part 11A to guide the electrode 10A into the holding part 11A. A pair of guide parts 11C, 11
C, a pair of support parts 11D and IID that are bent downward from each guide part 11G and extend downward from the bent part 11B, and a tapered part LIE from the lower end side of each support part 11D. The holding portion 11A, the bent portion 11B, each support portion 11D, etc. have a width dimension corresponding to the electrode 10A, and are relatively small. It is formed wide.

Further, each of the supporting parts 11D and each of the terminal pins 11F is spaced from each other by, for example, about 411IIIl in the radial direction of the Melf resistor lO, and each of the terminal pins 11F has a protruding dimension of about 20 tsm, for example, from each of the supporting parts 11D. It is formed. Each of the terminal pins IIF is mounted in each mounting portion 2 of the printed circuit board 1 as shown in FIG. 1, and fixed in the illustrated position by means of soldering or the like. In this case, it can be attached to the printed circuit board 1 in an upright position.

The terminal 11 according to this embodiment is as described above. Then, the Merck resistance lO is equal to each clamping part l of each terminal 11.
Using automatic insertion 411 (not shown) or the like into the
Each electrode 10A is inserted in the direction of the arrow in the figure, and each electrode 10A is inserted into each holding part 1.
1A with a large contact area. At this time, since a pair of convexly curved guide portions 11c are provided at the upper end opening side of each holding portion 11A, the electrode 10A of the MELF resistor 10 is guided by each guide portion 11c into the holding portion. You will be guided smoothly into 11A. Furthermore, since the substantially U-shaped bent portion 11B is provided on the bottom side of the clamping portion 11A, relatively large springiness can be imparted to the clamping portion 11A, and a strong clamping force can be applied to the clamping portion 11A. It is possible to give

Then, each electrode 10A of the MELF resistor 10 is held between each f! B
11A, each electrode 10A is soldered to each clamping part 11A using an automatic soldering machine (not shown), etc., and thereby the Merck resistor lO is mounted on the printed circuit board l. .

According to this embodiment, the holding portion 11A is connected to the electrode 10A.
Since the Merck resistor 10 can be easily and automatically inserted into the clamping part 11A via each guide BBIIc, etc., the clamping part 11A can be inserted into the electrode 10A. Since they are formed with corresponding width dimensions, the contact ii'j product between the holding portion 11A and the electrode 10A can be increased. Since the clamping part 11A is given greater springiness by the bent part 11B, the clamping part 11A can clamp the electrode 10A with a strong clamping force, improving positioning performance and automating soldering etc. be able to.

Furthermore, the terminal 11 can be downsized similarly to the MELF resistor 10, and the mounting density of the printed circuit board 1 can be dramatically increased. Furthermore, the overall height dimension can be made as small as possible, and various effects can be achieved, such as reducing the installation space for a control panel or the like to which the printed circuit board l is attached.

Next, FIGS. 4 and 5 show a second embodiment of the present invention, and the feature of this embodiment is that two MELF resistors 10 can be mounted on the left and right sides. Here, the terminal 21 has a holding part 21A, a bent part 21B, and each guide part 21, almost the same as the terminal 11 described in the first embodiment.
C1 is composed of each supporting portion 21D, each tapered portion 21E, each terminal pin 21F, etc.

However, the terminal 21 is provided with two clamping parts 21A, 21A on the left and right sides, and bent parts 21B, 21B, located between each part 21D, and the upper end of each clamping part 21A. There are guide parts 2IC, 21C, etc. on the opening side, respectively.
* are provided, and each of the holding parts 21A is integrally connected to each guide part 21C on the center side. Each support portion 21D is arranged in the left-right direction in FIG. 4, for example, 7IIf
Bent portions 21G are spaced apart from each other by approximately fl and are inclined inward at a predetermined angle on the lower side of each of the letter holding portions 21D.

21G are formed, and the respective terminal pins 21F are spaced apart by about 4 mm as in the previous embodiment.

Thus, also in this embodiment configured in this way, the terminals 21 are mounted on the printed circuit board 1 as a set of two, and the terminals 21 are attached to the printed circuit board 1 as a set of two terminals. In addition to being able to obtain almost the same effects as M, it also has the advantage of allowing two Melf resistors 10 to be mounted on the left and right sides.

Next, FIGS. 6 to 8 show a third embodiment of the present invention, and the characteristics of this embodiment are that the terminal 31 is provided with a flat support portion 31A, and the upper side of the support portion 3.1A is By bending it into a substantially U-shape, a pair of arm portions 31 are formed to face each other in the left-right direction in FIG. 7 with a distance smaller than the diameter of the Melf resistor IO, and extend upward.
B, 31B, and a holding part 31C located on the upper side of each arm part 31B, formed in a concave curved shape downward with a radius corresponding to the outer peripheral surface of the electrode 10A side of the MELF resistor IO, and having an open upper end side; Each arm portion 31 is located on the bottom side of the holding portion 31C, and is provided by cutting out the upper end side of the support portion 31'A.
A notch 31D is formed to separate the space between the two arms 31B, and a notch 31D is located at the upper end of each arm 31B. a pair of guide parts 31E, 31E, and a predetermined dimension (for example, 41
111) #rt;+t.

It consists of a pair of terminal pins 31F, 31F that protrude downward and are attached to each mounting portion 2 of the printed circuit board 1.

Here, the terminal 31 is made by forming a conductive metal plate, for example a thin metal plate of copper, into a predetermined shape using means such as pressing, and then forming each arm portion 31B into a substantially U-shape. It is formed by bending. The support portion 31A includes each terminal. Further, at the lower end of each arm portion 31B, a tapered portion 31G that slopes downward at a predetermined angle is provided.
.

31G is formed.

Thus, also in this embodiment configured in this way, the terminals 31 are mounted on the printed circuit board l as a set of two, and the electrode 10A side of the MELF resistor 10 is inserted into the clamping part 31C via each guide part 31E. It can be automatically inserted from above, and almost the same effects as in the first embodiment can be obtained.

Next, FIGS. 9 and 10 show a fourth embodiment of the present invention, and the feature of this embodiment is that the Melf resistor 10 is arranged in two directions, one above and one below.
The reason is that they can be worn individually. Here, the terminal 41 has a support part 41A, each arm part 41B, and a clamping part 41C, almost the same as the terminal 31 described in the third embodiment.
1 notch portion 41D, each guide portion 41E, each terminal pin 41F
and each tapered portion 41G.

However, in the terminal 41, each arm portion 41B extends further upward, and two clamping portions 41C, 41C are formed in the middle of each arm portion 41B at the top and bottom. Each guide portion 41E is inserted into each holding portion 41C from above.
The Merck resistors 10 can be automatically inserted one after another through the .

Thus, in this embodiment configured in this way, it is possible to obtain almost the same effects as in the third embodiment, but in particular, in this embodiment, two Merck resistors 10 are installed at the top and bottom. It's coming.

Next, FIGS. 11 to 14 show a fifth embodiment of the present invention, and the feature of this embodiment is that one conductive metal plate, for example, a thin plate of copper, is pressed in advance by means such as pressing. The terminal 51 is formed by molding the terminal 51 into a predetermined shape, and then bending the upper side rearward into a substantially U-shape as shown in FIG.

Here, the terminal 51 is located on the flat support part 51A and on the upper side of the support part 51A, as shown in FIG.
Two holding parts 51B, 51B are arranged in a row in the left-right direction in FIG. 3, and are also formed by the bending process at a distance of about 1, for example, 1+am, in the front-back direction, and are open on the upper end side.
- and a total of three connecting parts 51C that are located on the upper end side of each of the clamping parts 51B and connect the clamping parts 51B in the front and rear direction.

51C, . . . and tapered guide portions 51D, 51 located at the upper end opening side of each holding portion 51B and formed to be inclined downward at a predetermined angle on each connecting portion 51C.
D, -..., in order to give springiness to each clamping part 51B,
a notch 51E provided on the bottom side of each holding portion 51B;
51E, . . . and a pair of terminal pins 51F that protrude downward from the lower end side of the support portion 51A at a predetermined distance in the left-right direction.

51F, and each terminal pin 51F is, for example, 5m long.
They are mounted on the printed circuit board 1 at a distance of about m.

Each of the holding parts 51B is connected to the electrode 1 of the MELF resistor 10.
It is formed in a downwardly concave curved shape with an arc corresponding to the outer circumferential surface on the 0A side, and a MELF resistor 10 can be automatically inserted into each clamping part 51B from above via each guide part 51D. Moreover, each of the notches 51E located on the front side is formed by cutting the upper side of the support part 51A into a substantially U-shape.

Thus, in this embodiment configured in this manner as well, the terminal 51 is mounted on the printed circuit board 1 as a two-side assembly, and substantially the same effects as in the second embodiment can be obtained.

It should be noted that each of the above embodiments has been described taking as an example the case where one or two Melf resistors 10 are installed, but the present invention is not limited to this, and two or more Melf resistors 10 are attached to the terminal If (31). It may be modified as appropriate so that an IO can be attached thereto, or it may be modified so that one or more Melf resistors 10 can be attached to the terminal 21 (41, 51).

(Effects of the Invention) As detailed above, according to the present invention, the terminal is formed of a conductive metal plate, and the terminal has a downwardly concave curved shape with a circular arc corresponding to the outer peripheral surface of the adjustment resistor on the electrode side. Since the holding part is formed and the upper end side is open,
Not only can the adjusting resistor be easily and automatically inserted into the clamping part from above, but when the electrode side of the adjusting resistor is mounted in the clamping part, the contact surface between the electrode and the clamping part can be increased, and the adjustment You can determine the resistance accurately and automate the soldering etc. In addition, various effects can be achieved, such as the ability to significantly improve the mounting density of printed circuit boards.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a perspective view of the terminal attached to a printed circuit board, FIG. 2 is a front view of the terminal, and FIG. The sectional view in the direction of the arrow ■-m in Figure 2, Figures 4 and 5 are
Fig. 4 is a front view of the terminal, Fig. 5 is a sectional view in the direction of arrow v-■ in Fig. 4, and Figs.
The figures show the third embodiment, Fig. 6 is a perspective view showing the terminal attached to the printed circuit board, Fig. 7 is a front view of the terminal, and Fig. 8 is the arrow mark in Fig. 7. The direction cross-sectional view, FIG. 9 and FIG. 1O show the fourth embodiment, FIG. 9 is a front view of the terminal, and FIG.
11 to 14 show an embodiment of ff15, FIG. 1I is a front view of the terminal, FIG. 12 is a plan view of FIG. 11, and FIG. 13 is a back view of FIG. 11. , FIG. 14 is a sectional view in the direction of W->IIV (arrow in FIG. 11),
FIG. 15 is a perspective view showing how a conventional adjustment resistor is attached to a terminal on a printed circuit board. l... Printed circuit board, 2... Mounting part, 10... Melf resistor, IOA... Electrode, 11, 21, 31, 41
゜51...Terminal, 11A, 21A, 31C. 41C, 51B... holding part, IIF, 21F. 31F, 41F, 51F...terminal pins. ■'' Figure 4 ■ Figure 6 Figure 7 Mouth Figure 11 Summer Figure 15

Claims (2)

[Claims] (1) An adjustment resistor terminal formed of a conductive metal plate for mounting on a printed circuit board an adjustment resistor formed in a cylindrical shape and provided with electrodes on the outer periphery of both ends, the adjustment resistor a holding part formed in a downwardly concave curved shape with an arc corresponding to the outer peripheral surface of the electrode side and having an open upper end; a terminal located below the holding part, protruding downward and attached to the printed circuit board; A terminal for adjusting resistance consisting of a pin. (2) The adjusting resistance terminal according to claim (1), wherein a notch is formed on the bottom side of the clamping part in order to impart spring properties to the clamping part.