JPS6018869Y2 - Stopper for printed board - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stopper for printed circuit boards that has a connector for connection on the front surface.

Printed boards, which are widely used in the construction of various electronic devices, have various electronic components mounted on their front surfaces, are connected to printed wiring arranged on the back side, and have the necessary connections for the printed circuit board circuits at their rear ends. It is equipped with external connection terminals and is detachably connected to the connector fixed to the back of the rack, and has a structure that allows it to be detached from the connector and pulled forward as needed for maintenance, inspection, or replacement. configured.

In recent years, with the advancement of various electronic components mounted on printed circuit boards, their shapes have become smaller and the number of mounted components has increased.As the number of external connection terminals has increased, they have been placed on the rear end of the printed circuit board as in the past. There is no longer a sub-girder for arranging connection terminals such as, etc., and it has become necessary to arrange them at the front end as well.

Even if this sub-girder is present, for printed boards that require relatively frequent maintenance and inspection, if the necessary connection terminals are provided at the front end of the printed board, it can be used as a rack (cabinet, There is no need to go to the back of the rack (also called a locker), making maintenance and inspection work easier, and sometimes there is also the advantage that there is no need to take into account the rear child girder space of the rack.

In this way, there are many advantages to providing connection terminals for external connections or maintenance and inspection at both ends of the front layer of the printed board, but the connection terminals at the front end also need to be connected to connectors, and the printed board itself is also connected to equipment. It must be configured so that it can be inserted and removed from the rack.

In order to achieve both of these requirements, it is necessary that the printed circuit board itself maintains its inserted normal fixed position when the front connector is pulled out.

For this reason, it is conceivable to removably fix a connector removal prevention plate to the frame on both sides of the equipment rack at a slight position other than the front connector mounting position of the printed circuit board, but attaching and detaching the prevention plate every time it is necessary will reduce work efficiency. If it becomes necessary to remove the device for a long period of time, there is a risk that it will be lost.

The present invention provides a stopper for printed circuit boards that is advantageous for use in such cases.

The stopper according to the present invention has a linear blocking bar in the center, is formed into an L-shape on both sides, and its tips are rotatably suspended from L-shaped hardware fixed to the frame on both sides.

The central linear blocking bar prevents the printed board from coming off forward when the connector is pulled out at the top or bottom end position other than the front connector installation position of the printed board row installed on the equipment rack. Due to the configuration in which the tips of the side-shaped portions are rotatably suspended from L-shaped metal fittings fixed to the frame on both sides, the blocking bar can be moved downward or upward as necessary to prevent immediate contact with the front surface of the printed board. Release the lock and make it possible to draw it forward.

In order to maintain and release the blocking position of the blocking bar, it is sufficient to use a bullet plate that engages with the slant-shaped portions on both sides, or a screw fastener.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a perspective view of a printed circuit board 8 having a connector 1.2.3 at the front end and a row of connecting terminals 4, 5° 6.7 inserted into the connector at the rear end. 2.3 is fixed along the front edge of the printed board 8 via a mounting hardware 9 which is fixed by caulking.

The required number of upper and lower end sides 10 and 11 of the printed circuit board 8 are inserted into the upper and lower guide grooves of the front and rear open case (not shown), which is similar to the conventional structure, and all or part of the rear terminal rows 4 to 7 are inserted. Connected to the connector fixed to the back of the case.

At this time, one part may be connected to a free connector that is not fixed to the back of the housing.

The printed board stopper according to the present invention utilizes one or both of the upper and lower front ends 12 and 13 of the printed board.

FIG. 2 is a perspective view of two sides of the printed board stopper according to the present invention together with the arrangement of the printed boards. The required number of cabinets (shown in 15.16) shall be placed and fixed at the top and bottom of the cabinet, and side plates and cover plates shall be attached to the top of both sides of the opening/closing door J on the front side. Same as before.

The stopper of the present invention is made of, for example, a metal rod with a diameter of about 5 mm, and has a linear blocking bar 1''7 in the center, and has single-shaped portions 18 and 19 on both sides, and the ends thereof are bent to form a rotating shaft portion 2.
0.21, and is screwed into the circular hole of the L-shaped metal fitting 24.25, which is screwed into the appropriate position of the mounting holes 22.23' which are set at predetermined intervals in the frame frames 15, 16. 20° 21 is rotatably fitted, and the blocking bar 17 is in contact with the front lower end portion 13 of the printed board row.

By rotating the blocking bar 17 downward about the rotating shaft 20.21 as shown by the arrow, the blocking bar 17 moves downward and away from the lower end 13, and the printed board is pulled out forward.

The mounting holes 26, 26', etc. of the L-shaped hardware 24, 25 fixed to the frame frames 15, 16 are the mounting holes 22' of the frame formed at specified intervals, and the mounting holes 22' of the frame frames 15, 16 are provided at specified intervals. Since the height of the hole is not necessarily constant, it is advantageous to form the blocking bar 17 in an oval hole in order to arrange the blocking bar 17 in the correct position with respect to the front lower end 13 of the printed board.

Connector 1.2.3 on the front of the printed board to the blocking bar 17
A blocking metal fitting 28 is attached to the L-shaped metal fittings 24 and 25 in order to have a function of preventing the printed board from escaping when the connector 27 and the like corresponding to the connector 27 are extracted.

FIG. 3 shows two embodiments of this blocking fitting 28. In A, it is made up of a circular arc portion 29 in contact with the L-shaped portion 19 of the blocking bar 17 and a flat plate portion 31 having an elongated hole 30. It is fixed to the 1-shaped hardware 25 with screws 32 via 30.

By loosening the screw 32, the blocking bar 17 is moved downwards.

In the figure, an example is shown in which an elastic plate 34 having a figure 8-shaped portion 33 is fixed to a figure 1 hardware 25 with screws 35.

In this case, the blocking bar 17 is held by the elastic pressure of the S-shaped portion, and can be released by external force, or easily returned to the previous position by press-fitting from the released state.

As explained above, the present invention prevents the printed board from being pulled out even when the corresponding connector is pulled out even in a printed board array housing with connectors on the front, and it is also possible to pull out the printed board as desired. .

Furthermore, since the printed board stopper is provided on the frame that supports the casing that houses the printed board, the printed board stopper can be easily installed without processing the casing itself, and its practical effects is big.

[Brief explanation of drawings]

Fig. 1 shows an example of a printed board with a connector on the front side in a front perspective view, Fig. 2 shows an example of a stopper according to the present invention in a perspective view of the main parts together with the printed board arrangement, and Fig. 3 shows an example of a printed board with a connector on the front side. 2 shows two embodiments of advantageous blocking fittings in perspective views; FIG. In the figure, 1, 2.3 are connectors attached to the front of the printed board 8, 12.13 are the upper and lower ends of the front surface, and 14
15 and 16 are the housing, 15 and 16 are the front frames of the cabinet, 17 is the blocking bar of the stopper, 18 and 19 are the L-shaped portions of the stopper, 24 and 21 are the mounting hardware, and 28 is the blocking hardware.

Claims (1)

[Scope of Claim for Utility Model Registration] A stopper for a printed board that is provided facing the printed board insertion surface of a housing in which a printed board is housed, and that prevents the printed board from being pulled out from the printed board insertion surface. comprising L-shaped hardware fixed to a frame supporting the casing on both sides of the printed board insertion surface, and a blocking bar having a straight center portion and an L-shape at both ends; Two positions: a position where the central portion of the blocking bar exists within the printed board insertion surface and a position where the central portion retreats from the printed board insertion surface.
A stopper for a printed circuit board, characterized in that both ends of the blocking bar are rotatably suspended from the L-shaped hardware so that the blocking bar can be positioned.