JP2884206B2 - Printed circuit board unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board unit, and more particularly to a printed circuit board unit having an improved structure in terminals used by soldering to a printed circuit board of, for example, a motor protection relay.

[0002]

2. Description of the Related Art As a conventional device of this type, there is a relay terminal disclosed in Japanese Utility Model Laid-Open No. 3-112852, for example. This relay terminal relates to a structure for removing a juxtaposed relay in a relay terminal in which a plurality of relays are juxtaposed, and does not relate to a structure of a terminal. Further, as the one related to the terminal structure as in the present invention, there is a terminal structure of an electronic component disclosed in Japanese Utility Model Laid-Open No. 63-1270075. This technology is to obtain a structure in which the space of the terminal area can be reduced and the number of terminals can be increased by making the structure of the insulating resin for fixing the terminals and fixing each terminal into a multi-stage type having a shifted structure. It is considered to be the purpose.

A conventional printed circuit board unit for a motor protection relay, for example, has a structure shown in FIGS. 6 and 7. FIG. Here, FIG. 6 is a perspective view showing a state in which the printed circuit board unit is separated into three members (a), (b), and (c), and FIG. 7 is a cross-sectional view showing the structure of the printed circuit board unit. It is a block diagram. In both figures, 12
Is a terminal block for a printed circuit board (hereinafter referred to as a terminal block).
Reference numeral 3 denotes a printed circuit board to which the terminal block 12 is soldered to connect and fix each terminal and a predetermined printed wiring. The terminal block 12a is connected to the printed circuit board 3.
The connection conductors 12b, which constitute the pins connected to the connection conductors, are fixed conductors which are soldered to the printed circuit board 3 to fix the terminal block 12, similarly to the connection conductors, and are branched from the connection conductors 12a and are electrically connected. A combination of the terminal block 12 and the connecting conductors 12a and the fixed conductors 12b, which form several terminals, is called a unit terminal.
Reference numeral 4 denotes other electronic components mounted on the printed circuit board 3.

FIG. 6A shows a case A 11 for forming an outer frame, and a case 11a for exposing a terminal block 12 soldered to a printed circuit board 3 from the inside of the apparatus to enable wiring to each terminal. A case hole 5 shown in FIG. 6C is a case B in which the printed circuit board 3 is built in and combined with the case A11 to form a case outer frame 20. The case outer frame 20 in which the case A11, the printed circuit board 3, and the case B5 are combined is mounted on a case box 21 containing a protection relay or the like (not shown), and as a whole, for example, one unit of a motor protection relay device is configured. You.

[0005] The conventional printed circuit board unit is constructed as described above. For example, when a screw of the terminal block 12 is tightened to perform wiring connection to these terminals, a connection conductor inside the terminal block 12 is formed. Because there is a gap between the terminal frame 12a and the terminal outer frame 12c of the terminal block 12, for example, the fixed conductor 1
Although it is easy to understand in consideration of the case where 2b does not exist, an excessive force is applied to the soldering portion of the terminal block 12 to the printed circuit board 3. Therefore, the terminal block 12 supports the terminal block 12 by connecting the connection conductor 12a and the fixed conductor 12b to the printed circuit board 3 so that the soldered portion is not damaged by excessive force. Has become.

[0006]

In the above-described conventional printed circuit board unit, when an excessive force is applied to the wiring portion of the terminal block 12, the connection conductor 12a and the fixed conductor 12a are fixed.
b by dispersing the force applied to the connection conductor 12a.
Because it is configured so that the soldered part of the
There is a problem that a space for soldering the fixed conductor 12b is required on the printed circuit board 3, and another electronic component 4 cannot be attached to the end surface of the fixed conductor 12b.

The present invention has been made to solve such a problem, and even when a force is applied to a terminal,
An object of the present invention is to provide a unit terminal for a printed circuit board that disperses a force to an adjacent terminal so that a force is not applied only to a terminal to which a force is applied and a soldered portion is not damaged without a fixed conductor. It is.

[0008]

According to a first aspect of the present invention, there is provided a printed circuit board unit including a terminal plate having a wiring portion having one end having a screw for external wiring and a pin having the other end soldered to the printed circuit board; A plurality of the terminal boards are aligned and a unit terminal is integrally formed on the pin side with an insulator. The pins of the unit terminal are soldered to a printed circuit board,
A printed circuit board is covered with a case having a plurality of holes through which a plurality of wiring portions are drawn out from the inside and a partition wall between the holes, and the partition walls abut and sandwich both side surfaces of the wiring portion. is there.

A printed circuit board unit according to a second aspect of the present invention is a printed circuit board unit comprising: a plate-shaped conductor terminal plate having one end having a wiring portion having an external wiring screw and the other end having a pin soldered to the printed circuit board; It has a plurality of holes through which the plurality of wiring portions are drawn out from the inside, and a partition wall between the holes. The partition extends along the terminal plate inside the entrance of the hole, and has an elastic force to press the terminal plate. And a plurality of terminal boards are aligned and soldered to the printed circuit board respectively, and when the printed circuit board is covered with the case, The terminal plate is supported by the elastic force of the pair of protrusions extending.

Further, a printed circuit board unit according to a third aspect of the present invention has a wiring portion having an external wiring screw at one end, and a terminal plate made of a plate-shaped conductor to which the other end is soldered; It comprises a plurality of holes for taking out the wiring portion from the inside and a case having a partition wall between the holes, and solders one end of the plurality of terminal boards and one end of a flat cable, and connects the other end of the flat cable to a printed circuit board. And the printed circuit board is covered with the case.

[0011]

According to the first aspect of the present invention, a terminal portion is a plate-shaped conductor having a wiring portion having one end having a screw for external wiring and a pin having the other end soldered to a printed circuit board. Since the pin side is integrally molded with an insulator, when screwing wiring to the wiring part, as a protection against accidents that damage the soldered part of the printed circuit board due to the force applied at the time of wiring, the integrated insulator Reinforced, furthermore, both side surfaces of the wiring portion of the terminal plate are abutted and sandwiched by the partition walls, so that the force transmitted to the internal integrated insulator and the soldered portion of the terminal plate can be reduced.

According to the second aspect of the present invention, the terminal extends along the terminal plate inside the entrance of the hole of the case which covers the printed circuit board to which the plurality of individual terminal plates are soldered. Since a pair of projections provided is provided and the terminal plate is supported by the elastic force of the pair of projections, the force applied to the terminal plate is absorbed and dispersed by the elastic force, so that the The power is eased.

Further, in the third invention, instead of soldering the plurality of terminal boards to the printed circuit board, one end of each of the plurality of terminal boards and the flat cable is soldered,
Since the other end, which is the flat part of the flat cable, is soldered to the printed circuit board, the force applied to the terminal board is absorbed and dispersed by the flat part of the flat cable. And the reliability of the connection between the printed circuit board and the terminal board is increased.

[0014]

Embodiment 1 FIG. 1 is a perspective view showing a state in which a printed circuit board unit according to an embodiment of the present invention is disassembled into three large parts (a), (b) and (c). FIG. 2 is a sectional view showing the structure of a printed circuit board unit in which the above-mentioned three large parts are assembled in a case box. In both figures, 3-5
And 21 denote the same parts as those described in the conventional example of FIGS. 6 and 7, and a description thereof will be omitted. 2 is a terminal provided with a screw for external wiring at one end and a printed circuit board 3 at the other end.
The plate-shaped conductor 2a provided with a pin to be soldered to
A plurality of unit terminals for a printed circuit board which are arranged at equal intervals and whose pin sides are integrally formed with no gap using an insulating material such as resin. The terminal block 12 shown in the conventional example of FIG.
And a unit terminal of a combination of a plurality of terminals. Reference numeral 2b denotes a terminal outer frame which forms an integral part of the unit terminal 2. The unit terminal 2 is connected and fixed to the printed circuit board 3 by soldering pins of each terminal to predetermined wiring of the printed circuit board 3.

The case A1 shown in FIG. 1A has a plurality of through-holes 1b through which a wiring portion (screw portion) of the unit terminal 2 is drawn out from the inside. In order to secure an inter-terminal insulation distance between the plate-shaped conductors 2a and to avoid a short circuit, partition walls 1a are provided between the two.
The printed circuit board 3 is housed in the case A1 so that the wiring portions of the plurality of plate-shaped conductors 2a pass through the through holes 1b, and the partition walls 1a hold both sides of the wiring portion of the unit terminal 2 in contact with each other. Case B5 shown in FIG.
Are combined and combined as shown in FIG. 2 to be stored in the case box 21 as one unit.

When an excessive force is applied to the printed circuit board unit terminal 2 at the portion of the plate-like conductor 2a at the time of connecting the wiring by screwing to the wiring material, the excessively large force is applied to the unit terminal 2 for the printed circuit board. The force is not applied only to the soldered portion with the printed circuit board 3 on the opposite side of the plate-shaped conductor 2a to which the screw is tightened, but the force is applied to the terminal outer frame 2b to which the plurality of plate-shaped conductors 2a are fixed without any gap. By being transmitted, it acts so as to be dispersed to the soldered portion of another adjacent plate-shaped conductor 2a. Thus, even if an excessive force is applied to the wiring portion (screw portion) of the plate-shaped conductor 2a, a large force is not applied to the soldered portion of one plate-shaped conductor 2a.

Embodiment 2 In this embodiment, when a plurality of plate-like conductors are soldered independently without being integrally formed with the pin portions, the same buffering effect of the force as in Embodiment 1 is applied to the soldered portions. An example of the configuration of a printed circuit board unit having the following will be described.

FIG. 3 is a sectional structural view showing a second embodiment of the present invention. The same parts as those in the first and second embodiments shown in FIGS. As shown in FIG. 3, a plurality of plate-shaped conductors 2a are soldered to the printed circuit board 3, respectively. The case A1 having a plurality of through holes 1b through which the terminal plate made of the plate-shaped conductor 2a passes is formed along the terminal plate 7 from the upper edge and the lower edge of the entrance of each through hole 1b. A pair of projections 6 provided with an elastic force to pinch them 7 are provided. The illustration of the protrusion 6 extending from the lower edge of the entrance is omitted. The plate-shaped moving body 2a is squeezed and supported by the pair of projections 6.

As described above, the unit terminal of this embodiment has a configuration in which a plurality of plate-like conductors 2a are soldered to the printed circuit board 3 so as to be aligned in a horizontal line, for example. In this case, the plate-shaped conductor 2 is formed by a pair of protrusions 6.
a, the excessive force applied to the wiring portion of the plate-shaped conductor 2a is distributed to the pair of protrusions 6 and the soldered portion of the plate-shaped conductor 2a. It is remarkably relaxed in some parts.

Embodiment 3 In the printed circuit board unit of this embodiment, instead of soldering a plurality of plate-shaped conductors to the printed circuit board, a terminal plate is connected to a flat cable, and the flat portion of the cable is integrated. A description will be given of one that appears in a state close to molding.

FIG. 4 is a perspective view showing a terminal plate and a flat cable according to the embodiment. In the figure, a plate-like conductor 2a
Is a plate-shaped conductor having one end having a threaded wiring portion and the other end having a conductor portion for wiring the flat cable 8. One end of each of the plurality of terminal plates 7 and one end of the flat cable 8 are connected to each other. Each unit 9 is soldered, and the other end of the flat cable 8 is wired to the printed circuit board 3 in the same manner as in the first and second embodiments, so that unit terminals are formed.

Also in the structure of this embodiment, when an excessive force is applied to the wiring portion of the terminal plate 7 during the wiring work, the force is distributed to the flat portion by the flat portion of the flat cable 8 so Works so as to reduce the force applied to the soldered portion, and the same effect can be obtained.

Embodiment 4 In this embodiment, the terminal plate is L-shaped, for example, like the wiring portion of the contact terminal 12a shown in the conventional example of FIG. 6, and is perpendicular to the plate-like portion. An example in which a terminal plate having a wiring screw is integrally formed will be described.

FIG. 5 is a sectional view showing one embodiment of the present invention.
FIG. 8 is shown corresponding to the conventional example cross-sectional view of FIG. In the figure, reference numeral 22a denotes a terminal plate, and a plurality of terminal plates 22a are integrally formed at parallel and equal intervals, and the terminal plate 22a has a terminal outer frame 10 having a partition wall for providing an insulating distance between terminal plate wiring portions. Unit terminals are configured. Case A11
Has a case hole 11a provided for taking out the wiring portion of the terminal plate 22a from the inside of the case to the outside, and the terminal is supported by the case A11 through the case hole 11a. In this case, since the terminal outer frame 10 is narrowed on the printed board 3 side by the step 10a, a considerable space can be obtained by the space formed by the step 10a, so that other electronic components 4 and the like are arranged on the printed board 3. It does not hinder you from doing so. The printed circuit board unit according to the configuration of the present embodiment can provide the same effects as those described in the above-described embodiments.

The configuration of the printed circuit board unit has been described above with reference to the first to fourth embodiments. As a common effect, first, an excessive force applied to the wiring portion can be reduced at the soldering portion. The reliability of the connection between the substrate and the terminal plate is improved. In addition, since a fixed conductor for supporting the terminal plate is not required, the space for mounting other electronic components is increased, and the size of the device is reduced.

Further, in Examples 2 and 3, the holes in the case can be made smaller, so that the dust emission is improved. Further, since the unit terminals are formed by integral molding as in the first embodiment, there is an advantage that not only automatic soldering with a jig or the like is possible but also the mechanical strength of the terminal plate itself can be maintained.

[0027]

As described above, according to the first aspect of the present invention, the terminal plate is a plate-like conductor having one end having a screw for external wiring and the other end having a pin to be soldered to a printed circuit board. Since the pin sides of the terminal boards are integrally molded with an insulator, when screwing wiring to the wiring part, as a protection against accidents that damage the soldered part of the printed circuit board due to the force applied at the time of wiring to the wiring part, Reinforced by an integrated insulator, and the both sides of the wiring part of the terminal board are abutted and sandwiched by the partition walls, reducing the power transmitted to the internal insulator and the soldered part of the terminal board As a result, the force applied to the soldered portion is reduced, the reliability of the connection between the printed circuit board and the terminal board is increased, and the conventional fixed conductor for supporting the terminal board is not required. Other electrons to the end face Can be attached to goods, there is an advantage that it is possible to reduce the outer shape of the device.

According to the second aspect of the present invention, the terminal board extends along the terminal board inside the hole entrance of the case which covers the printed circuit board to which the plurality of terminal boards are soldered, and has an elastic force to press the terminal board. Is provided, and the terminal plate is supported by the elastic force of the pair of protrusions. Since the force applied to the terminal plate is absorbed and dispersed by the elastic force,
This reduces the force on the soldered part, increases the reliability of the connection between the printed circuit board and the terminal board, and eliminates the need for conventional fixed conductors that support the terminal board. Can be attached, and the effect that the outer shape of the device can be reduced can be obtained.

Further, according to the third aspect, instead of soldering the plurality of terminal boards to the printed circuit board, the plurality of terminal boards and one end of the flat cable are soldered to form a flat portion of the flat cable. Since the other end is soldered to the printed circuit board, the force applied to the terminal board is absorbed and dispersed by the flat part of the flat cable, so the force on the soldered part is reduced and the printed circuit board is The reliability of the connection between the terminal board and the terminal board is increased, and a fixed conductor for supporting the terminal board as in the conventional case is not required, other electronic parts can be attached to the end face of the terminal, and the outer shape of the device can be reduced. The effect that it can be obtained is obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view showing Embodiment 1 of the present invention.

FIG. 2 is a sectional view showing a first embodiment of the present invention.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is an explanatory perspective view showing a terminal plate and a flat cable according to Embodiment 3 of the present invention.

FIG. 5 is a sectional view showing a fourth embodiment of the present invention.

FIG. 6 is a perspective explanatory view showing a state in which a conventional printed circuit board unit is separated into three members.

FIG. 7 is a sectional view showing the structure of the printed circuit board unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case A 1a Partition wall 1b Through hole 2 Unit terminal 2a Plate conductor (terminal plate) 2b Terminal outer frame 3 Printed circuit board 4 Other electronic components 5 Case B 6 Projection 7 Terminal plate 8 Flat cable 9 Solder 10 Terminal outer frame 10a Step difference DESCRIPTION OF SYMBOLS 11 Case A 11a Case hole 12 PCB terminal block (terminal block) 12a Connecting conductor 12b Fixed conductor 12c Terminal outer frame 20 Case outer frame 21 Case box 22a Terminal board

Claims (3)

(57) [Claims] 1. A terminal plate made of a plate-like conductor having one end having a wiring portion having a screw for external wiring and the other end having a pin soldered to a printed circuit board, and a plurality of the terminal plates being aligned to form the pin. And a unit terminal integrally molded with an insulator. The pins of the unit terminal are soldered to the printed circuit board, and a plurality of the wiring portions are put out from the inside. A printed circuit board unit, wherein the printed circuit board is covered with a case having a partition wall, and both side surfaces of the wiring portion are abutted and held by the partition wall. 2. A terminal plate of a plate-like conductor having one end having a screw portion for external wiring and a pin having the other end soldered to a printed circuit board, and a plurality of the wiring portions are taken out from the inside. It has a plurality of holes and a partition wall between the holes, extends along the terminal plate inside the entrance of the hole, and presses the terminal plate.
And a case having a pair of projections to which an elastic force is applied , and the plurality of terminal boards are aligned and soldered to the printed board, and when the printed board is covered with the case, The pair of pair extending along the terminal plate
A printed circuit board unit , wherein the terminal board is supported by an elastic force of a projection . 3. has a wiring portion having a thread for external wiring at one end, a terminal plate of a plate-shaped conductor to which the other end Ru are soldered,
Becomes a plurality the wiring portion from the inside a case having a partition wall between the bore and the plurality of holes let out, one end of said plurality of terminal plates and the flat cable soldered, other flat cable and soldered to end on the printed circuit board, PCB unit, which comprises coating the printed circuit board in the case.