JPH0755028Y2 - Wiring holding structure - Google Patents

Description

[Detailed Description of the Invention] [Outline] Regarding a holding structure for wiring such as optical fiber, coaxial cord, and electric wiring, which is wired along the mounting surface of a printed wiring board, the length and outer diameter of the wiring are large or small. Regardless of the above, the purpose is to provide a versatile, low-cost wire holding structure that does not limit the pattern formation area and that is easy to fix the wire. A wiring support having a metal core embedded and penetrating the shaft center of a flexible synthetic resin bar having a ring-shaped fold is provided.

The root portion of the wiring support shall be press-fitted between the terminals of the circuit parts mounted on the printed wiring board or press-fitted into the holes provided in the printed wiring board. Is configured to hold the wiring by being bent into an inverted U shape.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holding structure for wiring, such as optical fibers, coaxial cords, and electric wiring, which is wired along a mounting surface of a printed wiring board.

2. Description of the Related Art Electronic devices in which a large number of printed wiring boards are arranged in parallel in a box-shaped housing are widely used for electronic devices in recent years.

On the other hand, with the speeding up of signals and high-density mounting of circuit components,
An optical / electrical conversion module, a microwave circuit module, or the like is mounted on these printed wiring boards.

However, the optical transmission line, the microwave transmission line, etc. cannot be printed on the printed wiring board. Therefore, an optical fiber for transmitting an optical signal, a coaxial cord for transmitting a microwave, and a wiring such as electric wiring are wired along the mounting surface of the printed wiring board, and the optical / electrical conversion module or the microwave circuit module is provided. Directly connected.

[Conventional technology]

3 (a), (b), and (c) are perspective views showing a conventional wiring holding structure, respectively.

In FIG. 3 (a), reference numeral 1 denotes a printed wiring board that is plugged in parallel with a box-shaped housing (not shown) having a backboard, on the surface of which semiconductor components, etc. The circuit component 2 and the module 3 such as the photoelectric conversion module and the microwave circuit module are mounted.

A back board (not shown) is provided on the printed wiring board 1.
The wiring connector 4 and the connector 6 on the side edge on the side facing the
It is equipped with.

Reference numeral 5 is a wiring such as an optical fiber or a coaxial cord that connects the wiring connector 4 and the module 3.

When the wiring 5 that is laid along the mounting surface of the printed wiring board 1 as described above is laid on the straight line that connects the wiring connector 4 and the module 3, other circuit components 2 mounted on the printed wiring board 1 Since the wiring will be laid over the upper part of the wiring, the wiring height of the wiring will be high, and it will be adjacent when it is attached to the housing (the printed wiring boards are arranged in the housing at a pitch of 15/24 mm, for example). The wiring 5 may hit other printed wiring boards.

As a result, the wiring is damaged and it is difficult to insert the printed wiring board into the housing.

Therefore, the wiring 5 is made sufficiently long to have an extra length, and wiring is performed so as to sew between the parallel circuit components 2, and the wired wiring 5 is higher than a predetermined level from the surface of the printed wiring board. We have taken measures to prevent it from rising.

In FIG. 3A, the cover 10 made of a metal plate is attached to the wiring 5
This is an example in which the wiring 5 is prevented from rising by being attached to the printed wiring board 1 so as to cover the entire upper part of the wiring area.

That is, in the cover 10, the L-shaped leg 10A is arranged on the upper portion of the entire surface of the wiring area of the wiring 5 at a required position of the rectangular main flat plate.

Then, the cover 10 is attached to the printed wiring board 1 by providing a screw hole in the horizontal plate portion of the L-shaped leg 10A to be seated on the printed wiring board 1 and screwing a small screw into this screw hole.

In FIG. 3 (b), a pair of pads 12 are provided at required points on the printed wiring board 1.

Then, a U-shaped metal wire (for example, brass wire coated with insulation) 11 is mounted so as to straddle the wiring 5, and each end of the metal wire 11 is soldered to the corresponding pad 12, thereby 5 is prevented from floating and moving in the left-right direction.

In FIG. 3 (c), a pair of through holes 15 are provided at the required points of the printed wiring board 1, and an inverted U-shaped metal fitting 13 is provided.
Of the corresponding through hole 15
The inverted U-shaped metal fitting 13 is disposed at a desired position on the printed wiring board 1 by inserting and soldering into.

Then, by tying the wiring 5 to the inverted U-shaped metal fitting 13 using the string 14, the wiring 5 is prevented from rising and moving in the left-right direction.

[Problems to be solved by the device]

However, in any of the means shown in FIGS. 3 (b) and 3 (c) of the above-mentioned conventional example, the wiring route of the wiring is set in advance, and a large number of pads, through holes, etc. are provided on the route in advance, and The desired pads, through holes, etc. are selected and soldered according to the size of the extra length of the wiring, and there is a problem that the number of soldering steps is increased only to hold the wiring.

Further, there is a problem that the pattern forming area of the printed wiring board is reduced due to the large number of pads, through holes and the like.

On the other hand, the structure in which the cover is attached not only has the problem that the total weight of the printed wiring board is heavy because the cover is made of a metal plate, but also has a different shape for each wiring route of wiring. There is a problem that a cover is required and the cost becomes high.

The present invention was created in view of these points, and it is easy to fix the wire regardless of the extra length of the wire.
Another object of the present invention is to provide a general-purpose and low-cost wire holding structure without fear of limiting the pattern formation region.

[Means for Solving the Problems]

In order to achieve the above object, the present invention, as illustrated in FIG. 1, has a ring structure at least at the root of the outer peripheral surface in a holding structure for holding wirings to be laid along the mounting surface of a printed wiring board. Flexible synthetic resin bar with folds 23
Wiring support with a metal core 22 embedded through the axis of 21
Equipped with 20.

The root portion of the wiring support 20 is press-fitted between the terminals of the circuit component 2 mounted on the printed wiring board 1 or press-fitted into a hole provided in the printed wiring board 1.

The tip end of the wiring support 20 is configured to hold the wiring 5 by being bent in an inverted U shape.

[Operation] In the wiring support 20 described above, since the metal core 22 is embedded in the shaft center of the flexible synthetic resin bar 21, the wiring support 20 is bendable, but the wiring support 5 can be held by hand once. When bent at, the bent shape is retained.

Further, since the ring-shaped folds 23 are provided on the outer peripheral surface, the wiring support 20 is attached to the printed wiring board 1 only by pushing between the terminals of the circuit component 2 or the holes 25.

That is, the work of fixing the wiring is easy.

On the other hand, after mounting the circuit components, modules, etc., the wiring route of the wiring is arbitrarily set according to the extra length of the wiring 5, and the circuit component 2 near the route is selected. When the circuit component 2 is not mounted, the hole 25 is formed at a position avoiding the pattern. As a result, the wiring 5 can be fixed at any time depending on the size of the extra length of the wiring.

Therefore, it is possible to design the wiring of the pattern without considering the fixing of the wiring.

In addition, since the ring-shaped folds 23 are elastic, even if there is a relatively large difference between the terminal spacing dimension or hole diameter dimension and the outer diameter dimension of the wiring support 20, the ring-shaped folds 23 are firmly and securely attached.

Further, since a long wiring support may be provided and cut to a desired length each time it is used, the wiring support is versatile and low in cost.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings. The same reference numerals denote the same objects throughout the drawings.

FIG. 1 is a perspective view of an embodiment of the present invention, (a) is a perspective view of a wiring support, (b) is a perspective view of a main part showing a fixed state of wiring, and FIG. 2 is a perspective view of the present invention. It is a top view of an example.

The wiring support 20 of the present invention, as shown in detail in FIG. 1 (a), is an elongated rod-shaped synthetic resin bar 21 made of a flexible resin such as polyethylene, and a synthetic resin bar 21.
A ring-shaped fold 23 is provided on the outer peripheral surface of the end of the outer peripheral surface of the synthetic resin bar 21, which is composed of a metal core 22 made of, for example, a brass rod embedded in the axial center of the.

The wiring support 20 described above, as shown in FIG.
The circuit component 2 mounted at a desired position on the printed wiring board 1 is selected, and the base portion of the wiring support 20 is press-fitted between the terminals. Alternatively, holes may be formed at desired positions on the printed wiring board 1.
25 is bored, and the root portion of the wiring support 20 is pushed in and fixed. After that, the tip end of the wiring support 20 is bent as desired to hold the wiring 5.

At this time, the wiring support 20 has a flexible synthetic resin bar 21.
Since the metal core 22 is embedded in the shaft center of the wire, it is bendable, but when bent by hand, the bent shape is retained, so that the wiring 5 does not float up or shift in the left-right direction. .

At this time, the wiring support 20 has a ring-shaped fold 23 on the outer peripheral surface.
Since the ring-shaped folds 23 are elastically deformed, the ring-shaped folds 23 are easily pushed between the terminals of the circuit component 2 or into the holes 25, and are easily attached to the printed wiring board 1 by its elasticity.

The circuit component 2 is provided without forming the hole 25 in the printed wiring board 1.
FIG. 2 shows an example in which only the terminal 2A is used.

In FIG. 2, two modules 3 and many circuit components 2 such as semiconductors are mounted on the mounting surface of the printed wiring board 1.

On the other hand, a wiring connector 4 and a connector 6 for connecting to an external circuit are mounted on the side edges of the printed wiring board 1, respectively, and the wiring connector 4 and the module 3 are connected via the wiring 5 and the connector 6 And the circuit component 2 are connected via a pattern.

When the extra length of the wiring is large, as shown by the solid line, the wiring 5 is greatly meandered so as to spread over the entire mounting surface of the printed wiring board 1 for wiring.

Then, the circuit component 2 in the vicinity of the wiring route is selected, the wiring support 20 is attached using those terminals, and the distal end portion is bent to hold the wiring 5.

Further, when the extra length of the wiring 5 is small, the wiring 5 is laid out so that there is almost no meandering as shown by the dotted line, and the essential portions thereof are held by the wiring support 20.

The above-mentioned wiring support uses a long metal core and continuously coats a synthetic resin around the metal core, and then, through a die having a spiral groove, forms a spiral ring-shaped fold on the entire outer circumference. Provide a sufficiently long wiring support with ring-shaped folds on the entire outer circumference.

Then, by cutting the long wiring support to a desired length and using it, the cost can be further reduced.

[Effect of device]

As described above, according to the present invention, the wiring support can be fixed to the printed wiring board by pressing and engaging the root portion between the terminals of the circuit component or the hole of the printed wiring board, and by bending the tip end by hand. , You can hold the wiring.

Therefore, as compared with the conventional means such as soldering, the work for fixing the wiring is extremely simple.

In addition, since the wire is held by bending the tip, the wire can be held regardless of the size of the wire, the outer diameter of the wire, or the number of wires. Rich in cost and low cost.

Furthermore, since it is not necessary to provide a pad or a through hole on the printed wiring board, the pattern formation area of the printed wiring board is not limited.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, (a) is a perspective view of a wiring support, (b) is a perspective view of a main portion showing a state where the wiring is fixed, and FIG. 2 is an implementation of the present invention. An example plan view and FIGS. 3A, 3B, and 3C are perspective views of a conventional example, respectively. In the figure, 1 is a printed wiring board, 2 is a circuit component, 2A is a terminal, 3 is a module, 4 is a wiring connector, 5 is a wiring, 6 is a connector, 10 is a cover, 20 is a wiring support, and 21 is a composite. A resin bar, 22 is a metal core, 23 is a ring fold, and 25 is a hole.

Claims (1)

[Scope of utility model registration request] 1. A flexible synthetic resin bar (21) having a ring-shaped fold (23) at least at a root portion of an outer peripheral surface of a holding structure for holding wiring laid along a mounting surface of a printed wiring board. The metal core (2
2) is provided with a wiring support (20) which is embedded and penetrated, and a root portion of the wiring support (20) is pushed between terminals of a circuit component (2) mounted on the printed wiring board (1). The wiring support (20) is engaged or press-fitted into a hole provided in the printed wiring board (1), and the tip end of the wiring support (20) is bent into an inverted U shape, A wiring holding structure characterized in that it holds the wiring (5).