JPH02205100A - Locking structure of printed wiring board - Google Patents

Abstract

PURPOSE:To eliminate the fear of an optical fiber being damaged even if careless operation is commited by mounting a locking means, which consists of a hooking plate which becomes free in passage of a window by rocking and a supporting plate which supports the hooking plate freely in rocking, on a printed wiring board. CONSTITUTION:A locking means 30 consisting of a hooking plate 32, which becomes free in passage of a window 15 by rocking, and a supporting plate 31, which supports the hooking plate 32 freely in rocking, is mounted at the marginal part on the rear of a printed wiring board 5. In the process of the connective operation of an optical connector 10, the hooking plate 32 is maintained in such postures that the short plate-side end 32B hooks at the outer side face of a back board 2, and the main plate-side end 32A hooks at a connector housing 11. Accordingly, if trying to pull out the printed wiring board 5 with the optical connector 10 set in an adaptor 7, the short plate-side end hooks at the outer side face of the back board 2 and also the main plate- side end 32A of the hooking plate 32 hooks at the connector housing 11, whereby the rocking action of the hooking plate 32 is checked.

Description

[Detailed Description of the Invention] [Summary] A printed wiring board that does not cause damage to optical fibers even if careless operation is performed, regarding the locking structure of a printed wiring board equipped with an optical/electrical conversion element with an optical adapter. Near the rear edge of the printed wiring board that is removably attached to the housing,
In an electronic device equipped with an optical/electrical conversion element with an optical adapter and configured such that an optical connector is inserted through a window on a backboard and inserted into the optical adapter, an engagement plate that can freely pass through the window by swinging. and a support plate that swingably holds the engagement plate, is mounted on the printed wiring board, and with the optical connector inserted and connected to the optical adapter, the printed wiring board is removed. When attempting to do so, the short plate side end of the engagement plate is locked to the outer surface of the backboard, and the main plate side end is locked to the connector housing, preventing the rocking movement of the engagement plate. composition.

[Industrial application field]

The present invention relates to a locking structure for a printed wiring board equipped with a photoelectric conversion element with an optical adapter.

In optical communication equipment, light emitting elements, light receiving elements, etc.
Electronic devices in which electrical conversion elements are mounted on printed wiring boards and these printed wiring boards are mounted in parallel to a housing are widely used.

These optical/electrical conversion elements are generally connected to an optical fiber, which is an optical transmission path, via an optical connector.

[Conventional technology]

FIG. 6 is a side sectional view of a conventional electronic device, in which 1 has guides (not shown) for inserting and removing the printed wiring board 5 facing each of the upper and lower plates, and has an open front surface. It is a box-shaped case with a backboard 2 on the rear surface.

A photoelectric conversion element 6 with an optical adapter is mounted near the rear edge of this printed wiring board 5, and a back plate 8 made of a metal plate in plan view is attached to the rear edge of the printed wiring board 5. It is.

Then, the optical adapter 7 is attached to the back plate 8 so that the screw part of the optical adapter 7 of the optical/electrical conversion element with an optical adapter protrudes to the rear side of the back plate 8, and the window 1 provided on the back board 2 is attached.
5, insert the optical connector 10 into the optical adapter 7, screw the cap nut of the optical connector 10 onto the threaded part of the optical adapter 7, and connect the optical/electrical conversion element 6 and the optical fiber 12. ing.

In such an electronic device, when the printed wiring board 5 is removed from the housing 1 with the optical connector 10 still attached to the optical adapter 7, the optical fiber 12 is drawn into the housing, and the optical fiber is attached to the edge of the window. It gets caught and scratched, or bent and damaged.

Therefore, conventionally, a locking mechanism for a printed wiring board as described below has been provided.

That is, a threaded hole 18 into which the locking screw 16 is screwed is provided in the back plate 8, and an insertion hole 1 into which the neck of the locking screw 16 is inserted is provided in the backboard 2 opposite to this threaded hole 18.
7 will be provided.

After inserting the printed wiring board 5 into the housing 1 from the front side of the housing, the operator goes to the rear of the housing 1 and inserts the lock screw 16 into the insertion hole 17 of the backboard 2 from the outside of the backboard 2. The optical connector 10 is inserted into the optical adapter 7, and the threaded portion at the tip thereof is screwed into the screw hole 18 of the back plate 8, and then the optical connector 10 is inserted into the optical adapter 7.

Therefore, even if you inadvertently try to remove the printed circuit board 5 from the housing 1 with the optical connector 10 inserted into the optical adapter 7, the head of the lock screw 16 will be locked to the backboard 2. The wiring board is not removed. That is, there is no risk of damage to the optical fiber.

[Problem to be solved by the invention]

However, in the conventional lock structure described above, the mechanism for screwing the lock screw into the back plate and the mechanism for inserting the optical connector into the optical adapter are independent structures. Therefore, the optical connector may be inserted into the optical adapter without forgetting to screw the lock screw into the back plate.

If the user forgets to attach the lock screw 16 as described above, the printed wiring board may be removed while the optical fiber is still connected to the printed wiring board, resulting in damage to the optical fiber.

The present invention was created in view of these points, and it is an object of the present invention to provide a locking structure for a printed wiring board that does not cause damage to optical fibers even if careless operation is performed.

[Means to solve the problem]

In order to achieve the above object, the present invention, as illustrated in FIG. 6, and is configured such that an optical connector 10 is inserted through a window 15 provided on a backboard 2 and inserted into an optical adapter 7, an engagement plate that can freely pass through the window 15 by swinging. 32 and a support plate 31 that swingably holds the engagement plate 32 is mounted on the rear edge of the printed wiring board 5.

Then, when trying to remove the optical adapter 7 from the housing 1 with the optical connector 10 still inserted and connected to the optical adapter 7, the short plate side end 32B of the engagement plate 32 is locked to the outer surface of the backboard 2. At the same time, the main plate side end 32 of the engagement plate 32
A is locked to the connector housing 11, and the rocking movement of the engagement plate 32 is prevented.

[Effect]

As described above, the locking means 30 having the engagement plate 32 that swings to freely pass through the window 15 provided in the backboard 2 is mounted on the rear edge of the printed wiring board 5, and 5 is inserted into the housing 1, the engagement plate 32 is attached to the window 1.
5 and is positioned outside the backboard 2. Therefore, in order to insert the optical connector 10 into the optical adapter 7, the engagement plate 32, which is in a state that covers the window 15, must be inserted. It must be triggered as shown in Figure 5.

That is, in the process of connecting the optical connector 10, the engagement plate 32 is placed in such a position that the short plate end 32B is engaged with the outer surface of the backboard 2, and the main board end 32A is engaged with the connector housing 11. becomes.

Therefore, when trying to remove the printed wiring board 5 with the optical connector 10 still inserted into the optical adapter 7, the short board side ends 32B are locked to the outer surface of the backboard 2, and the main board side ends 32A is locked to the connector housing 11, the swinging movement of the engagement plate 32 is prevented, and the printed wiring board 5 cannot be pulled out from the housing 1 any further.

That is, during the operation process of inserting the optical connector into the optical adapter, the printed wiring board becomes locked, so even if the printed wiring board is carelessly attempted to be removed, the printed wiring board cannot be removed.

Note that after the optical connector is removed from the optical adapter, the engagement plate becomes swingable, so the printed wiring board can be removed from the housing.

〔Example〕

The present invention will be specifically described below with reference to the drawings. Note that the same reference numerals indicate the same objects throughout the figures.

Fig. 1 is a side sectional view of an embodiment of the present invention, Fig. 2 is a perspective view showing the main parts of the invention, Fig. 3 is a diagram showing the process of inserting a printed wiring board, and Fig. 4 is a printed wiring board. Diagram showing the process when removing the board,
FIG. 5 is a diagram illustrating the present invention in detail.

In FIG. 1, a back plate 8 made of a planar metal plate is attached to the rear edge of the printed wiring board 5, and a photoelectric conversion element 6 with an optical adapter mounted on the printed wiring board 5 is mounted. be.

The optical adapter 7 is attached to the back plate 8 so that the threaded portion of the optical adapter 7 of the optical/electrical conversion element 6 with the optical adapter protrudes to the rear side of the back plate 8.

Such a printed wiring board 5 is inserted into and removed from a box-shaped housing having an opening at the front and a backboard 2 at the rear using a guide (not shown) as a guide. Insert the optical connector 10 through the window 15 and attach it to the optical adapter 7, screw the cap nut of the optical connector 10 onto the threaded part of the optical adapter 7, and connect the optical/electric conversion element 6 and the optical fiber 12. It is supposed to be done.

Also, an engagement plate 32 that swings to allow free passage through the window 15, and a support plate 3 that swingably holds the engagement plate 32.
A locking means 30 consisting of 1 is mounted on the rear edge of the printed wiring board 5.

As shown in FIG. 2, which will be described in detail, the support plate 31 of the locking means 30 is a metal plate with a gate-shaped tip, and is attached to the top of the optical adapter 7 so that the pivot shaft 33 is horizontal. Back plate 8
It is fixed by welding etc. on top.

On the other hand, the engagement plate 32 has a rectangular shape in side view and a rectangular shape in plan view, which is formed by bending one of the short sides of a rectangular plate member.

Then, near the bent ridgeline, a bulge parallel to the ridgeline is provided, and a through hole into which the pivot shaft 33 is loosely inserted is provided in this bulge, and the bent side is defined as the short plate side with this through hole as the boundary. , and the other side is the main plate side.

The engagement plate 32 is inserted into the opening of the support plate 31 so that both ends of the bulge are sandwiched between the legs of the support plate 31, and is swingably attached to the support plate 31 by a pivot shaft 33 passing through the tip of the leg. is maintained.

Note that the distance between the pivot shaft 33 and the side edge of the short plate is the distance between the support plate 31 and the window 15 when the printed wiring board 5 is inserted into the housing 1.
shall be sufficiently larger than the distance to one side edge of the

When the printed wiring board 5 is inserted into or removed from the housing 1, the engagement plate 32 has a short plate side end 32B that hits the inner surface or outer surface of the backboard 2, and swings about the pivot shaft 33. and passes through the window 15 by swinging.

Hereinafter, referring to FIGS. 3 and 4, the engagement plate 32 is connected to the window 15.
Explain the process of passing through.

When inserting the printed wiring board 5 into the housing, as shown in FIG. 3(a), since the main plate side end 32^ of the engagement plate 32 is heavy, it is supported almost vertically with the main plate side end 32A downward. It is supported by a plate 31.

When the printed wiring board 5 is inserted into the casing 1 and the engagement plate 32 approaches the backboard 2, as shown in FIG. It abuts against the inner surface of the nearby backboard 2.

Furthermore, when the printed wiring board 5 is pushed in until the pivot shaft 33 passes through the window 15, the short board side end 32B is in contact with the backboard 2, so the engagement plate 32
swings about the pivot shaft 33 and becomes almost horizontal, and the main plate side passes through the window 15 first.

Next, the short plate side passes through the window 15 as shown in the third @.

When the printed wiring board 5 is completely inserted into the housing, the engagement plate 32 is located outside the backboard 2.
As shown by the dotted line, the main plate side is downward, and the window 15 is closed.

Therefore, as shown in FIG. 3(e), the main plate side end 3
2A, the optical connector 1 is removed from the window 15.
0 can be inserted into the optical adapter 7.

When removing the printed wiring board 5 from the casing, please refer to Fig. 4 (a).
), first, remove the optical connector 10 from the optical adapter 7.

Next, when the printed wiring board 5 is pulled out, the short board side end portion 32B comes into contact with the outer surface of the backboard 2 near the edge of the window 15, as shown in FIG. 4(b).

Further, when the printed wiring board 5 is pulled out, the engagement plate 32 swings about the pivot shaft 33 and the main plate side passes through the window 15 first, as shown in FIG. 4(C).

Then, as in No. 4(d), the short plate side passes through the window 15,
After passing, the engagement plate 32 returns to a substantially vertical state.

When the printed wiring board 5 is completely inserted into the housing 1, the engagement plate 32 is located outside the backboard 2, with the main plate side facing downward, so that the window 15 is closed.

When the printed wiring board 5 is inserted into the casing 1 as described above, the engagement plate 32 is in a position to close the window 15.

Therefore, in order to insert the optical connector 10 into the optical adapter 7, the main plate side of the engagement plate 32 must be raised as shown in FIG.

That is, in the process of connecting the optical connector IO, the engagement plate 32 is placed in such a position that the short plate end 32B is engaged with the outer surface of the backboard 2 and the main board end 32A is engaged with the connector housing 11. is retained.

Therefore, if you try to remove the printed wiring board 5 with the optical connector 10 still attached to the optical adapter 7, the short board side end 3
2B is engaged with the outer surface of the backboard 2, and the main plate side end 32A of the engagement plate 32 is engaged with the connector housing 11.
The engagement plate 32 is stopped from swinging.

That is, during the operation process of inserting the optical connector into the optical adapter, the printed wiring board becomes locked, and even if an attempt is made to remove the printed wiring board inadvertently, the printed wiring board is prevented from being removed.

That is, the optical fiber will not be damaged.

〔Effect of the invention〕

As explained above, the present invention has a locking means mounted on a printed wiring board, which is equipped with an engaging plate that swings in correspondence with the window of the backboard into which the optical connector is inserted, allowing passage through the window. The printed wiring board lock structure prevents the printed wiring board from being pulled out even if an attempt is made to remove the printed wiring board from the housing with the optical connector still inserted, resulting in damage to the 5-optical fiber. It has an excellent practical effect of not causing any problems.

328 is the main plate side end, 32B 33 each indicates a pivot shaft.

is the short plate side end,

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of an embodiment of the present invention, Fig. 2 is a perspective view showing the main parts of the invention, Fig. 3 is a diagram showing the process of inserting a printed wiring board, and Fig. 4 is a printed wiring board 5 is a diagram illustrating the present invention in detail, and FIG. 6 is a side sectional view of a conventional example. In the figure, 1 is a housing, 5 is a printed wiring board, 7 is an optical adapter, 10 is an optical connector, 15 is a window, 31 is a support plate, 2 is a backboard, 6 is a photo-electric conversion element, 8 is a back plate , 12 is an optical fiber, 30 is a locking means, 32 is an engagement plate,

Claims (1)

[Claims] An optical/electrical conversion element (6) with an optical adapter is mounted near the rear edge of a printed wiring board (5) that is removably attached to the housing (1), and an optical connector (10) the backboard (2) window (
In the electronic device configured to be inserted from the window (15) and inserted into the optical adapter (7), the engaging plate (32) can freely pass through the window (15) by swinging, and the engaging plate (32) A locking means (30) consisting of a support plate (31) that swingably holds the optical connector (10) is mounted on the printed wiring board (5), and the optical connector (10) is inserted and connected to the optical adapter (7). When trying to remove the printed wiring board (5) in this state, the short plate end (32B) of the engagement plate (32) engages with the outer surface of the backboard (2), and the main plate side The end (32A) is locked to the connector housing (11),
A locking structure for a printed wiring board, characterized in that the locking structure for a printed wiring board is configured to prevent the rocking movement of the engagement plate (32).