JPS6233359Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a printed circuit board guide rail for a printed circuit board storage shelf of an electronic device.

A first embodiment of a conventional printed circuit board guide rail is shown in FIGS. 1 to 3. In Figures 1 to 3, 1 is a printed circuit board guide groove, 2 is a slit,
3 is a rail fixing claw, 4 is a rail mounting plate, 5 is a shelf, 6 is a gap between the upper and lower shelves, 8 is a rail mounting hole, and 14 is a guide rail. The guide rails 14 shown in FIG. 1 are arranged in pairs as shown in FIG. 2, and the rails are attached using the rail fixing claws 3 so that the printed circuit board guide grooves 1 face the upper and lower surfaces inside the shelf 5. A printed circuit board (not shown) is guided by the printed circuit board guide groove 1 between the pair of guide rails 14 attached to the plate 4. FIG. 3 shows the upper shelf 5 in a state where the shelves 5 with guide rails 14 attached are stacked in two stages as shown in FIG.
Any one of the guide rails 14 attached to the bottom surface of
, and the guide rail 14 located directly below the guide rail and attached to the upper surface of the lower shelf 5 are cut at the center of the rail fixing claw along a plane perpendicular to the longitudinal direction of the guide rail 14. A cross section is shown. In this embodiment, as shown in FIG. 3, the guide rail 14 compresses and inserts the head of the rail fixing claw 3 into the rail mounting hole 8 of the rail mounting plate 4, and pulls the rail fixing claw 3 onto the rail mounting plate 4. By hanging the guide rail 14, the guide rail 14 is fixed. In this case, since the heads of the rail fixing claws 3 protrude from the top and bottom surfaces of the outside of the shelf 5, if two or more shelves 5 are stacked and mounted, there is a gap 6 between each shelf 5 due to the protrusion of the heads of the rail fixing claws 3. , which is not suitable for high-density mounting required for various recent devices, and also makes it difficult to attach and detach the rail fixing claws 3.

Next, a second embodiment of the conventional printed circuit board guide rail is shown in FIGS. 4 to 6. In FIGS. 4 to 6, 7 is a rail fixing press-fit dowel, and the other numbers are the same as those shown in FIGS. 1 to 3 in the first conventional embodiment. In this embodiment, a rail fixing press-fit dowel 7 is provided on the guide rail 14 as shown in FIG. The top surface of 5,
The guide rail 14 is fixed by fitting into the rail mounting hole 8 of the rail mounting plate 4 attached to the lower surface. When the guide rail 14 is attached to the rail mounting plate 4, the rail fixing press-fit dowels 7 have the same thickness as the rail mounting plate 4 and are designed not to protrude from the rail mounting plate 4. There is no need to substantially provide the gap 6, and the packaging density can be improved. However, in order to prevent the guide rail 14 from being easily unfixed, the rail fixing press-fit dowel 7 and the rail mounting hole 8 have the same diameter, so a large force is required to fit them together, and if force is applied from outside, the guide rail 14 will not be easily unfixed. The rail 14 easily comes off, and repeated attachment and detachment wears out the fitting portion between the rail fixing press-fit dowel 7 and the rail mounting hole 8, making it unusable.

The purpose of the present invention is to eliminate these drawbacks by making it possible to easily attach and detach the guide rail 14 and securely fix it, thereby improving work efficiency and making it possible to realize a high-density mounting device. This will be explained in detail below.

An embodiment of the present invention will be described with reference to FIGS. 7 to 13. FIG. 7 shows the entire guide rail 14,
A printed circuit board guide groove 1 is provided in a concave shape on the top surface, and a dowel 9 is provided on the opposite surface for inserting and fixing the guide rail 14 into the rail mounting hole 8 of the rail mounting plate 4, and is made of plastic. It is integrally molded. Figure 8 shows dowel 9 in Figure 7 with arrow A.
FIG. 9 is a cross-sectional view of the center portion of the dowel 9 taken along the dashed line BB' along a plane perpendicular to the longitudinal direction of the guide rail 14. The dowel 9 has a cylindrical shape that expands toward the tip, and a slit 10 (slit) having the same width as the printed circuit board guide groove 1 is provided in the center of the dowel 9 along the longitudinal direction of the guide rail 14. The dowel 9 is divided into two parts, and the tip of the dowel 9 is provided with a thick wall part 11 having a thickness sufficient to exhibit a spring effect due to deformation. It's summery. FIG. 10 shows a rail mounting plate 4 similar to those shown in FIGS. 2 and 5 in the conventional embodiment, and the rail mounting holes 8 are connected to the guide rail 14
The rail mounting hole 8 has a circular shape with a longer axis larger than the tip of the dowel 9 in the longitudinal direction, and the short axis of the rail mounting hole 8 is smaller than the tapered tip of the dowel 9.
It is larger than the base. In addition, the upper edge of the rail mounting hole 8 has a sagging portion 12 when the hole is press-drilled.
However, there is a burr 13 on the lower edge.

Next, a state in which the dowel 9 is inserted into the rail mounting hole 8 and the guide rail 14 is fixed to the rail mounting plate 4 will be described with reference to FIGS. 11 to 13. 11 to 13 show the guide rail 14 and rail mounting plate 4 at the same position as the cross section shown in FIG. 9.
A cross-sectional view of the fixed state is shown. FIG. 11 shows a state in which the dowel 9 of the guide rail 14 starts to be inserted into the rail mounting hole 8 of the rail mounting plate 4. Since the diameter of the tip of the dowel 9 is larger than the short diameter of the rail mounting hole 8, the dowel The tip corner of 9 rests on the sagging portion 12 of the rail mounting hole 8. Next, FIG. 12 shows a state in which the guide rail 14 is pressed and the dowel 9 is inserted about half into the rail mounting hole 8. In this case, since the dowel 9 is hollow with a slit 10 provided along the longitudinal direction of the guide rail 14, it is pushed and bent toward the center along the sagging portion 12 and inserted into the rail attachment hole 8 without any force. Since the dowel 9 is made of plastic, it is bent into the hollow part of the slit 10 in the state shown in FIG. 11 is deformed, and due to the reaction force, the dowel 9 is further deformed.
The tip of the rail mount strengthens the pressure against the inner wall of the rail mounting hole 8. FIG. 13 shows a state in which the guide rail is further pressed and the dowel 9 is completely inserted into the rail mounting hole 8.
In the state shown in FIG. 13, since the diameter of the tapered tip of the dowel 9 is larger than the short diameter of the rail mounting hole 8, the dowel 9 continues to press against the inner wall of the rail mounting hole 8, as in the case of FIG. Furthermore, the tip of the dowel 9 slightly protrudes from the lower part of the rail mounting plate 4 and interacts with the burr portion 13 of the rail mounting hole, so that the dowel 9 can be prevented from coming off. In addition, in this embodiment, the case where the rail mounting hole 8 is shaped like an inertia circle has been explained.
The same applies when the shape is circular.

By providing a plurality of dowels 9 as described above on the guide rail 14 and inserting the dowels 9 into the rail mounting holes 8 made in the rail mounting plate 4 of the shelf 5, the guide rail 14 can be firmly fixed. This prevents the guide rail 14 from easily coming off due to force. In addition, since the dowel 9 only slightly protrudes from the bottom of the rail mounting plate 4 during insertion, the gap 6 between each shelf (see Figure 2 or Figure 5) is small when stacking the shelves. , it is possible to increase the mounting efficiency of the device.

In the case of FIG. 7, two dowels 9 are provided on one guide rail 14, but dowels 9 may be provided in several locations depending on the length of the guide rail 14 and the fixity when installing the guide rail 14. It can also be cut to the required length and used commonly.

Further, by providing the thick portion 11 at the tip of the dowel 9, there is an effect that even when the dowel 9 is made smaller, the reduction in the fixing strength of the guide rail 14 can be covered.

In the present invention, by providing the guide rail 14 with a dowel 9 having a slit 10 and a thick wall portion 11 and inserting the dowel 9 into the rail mounting hole 8 of the rail mounting plate 4, the guide rail 14 can be firmly fixed. This prevents the dowels 9 from coming off easily and eliminates wasted space due to the protrusion of the dowels 9 from the rail mounting plate 4, making it possible to realize high-density mounting shelves 5 and devices with good work efficiency.

[Brief explanation of the drawing]

1 to 3 are diagrams showing a first embodiment of a conventional printed circuit board guide rail, in which FIG. 1 is a perspective view of the guide rail 14, FIG. 2 is a perspective view of the shield, and FIG. 3 is a perspective view of the guide rail 14. 2 is a cross-sectional view of the pair of upper and lower guide rails 14 in the gap between the shields, with the central part of the rail fixing claw cut along a plane perpendicular to the longitudinal direction of the guide rails 14. FIG. 4 to 6 are diagrams showing a second embodiment of the conventional printed circuit board guide rail, in which FIG. 4 is a perspective view of the guide rail 14, FIG. 5 is a perspective view of the shield, and FIG. 6 is a perspective view of the guide rail 14. is a cross-sectional view at the same position as FIG. 3. 7 to 13 are views showing an embodiment of the present invention, in which FIG. 7 is a perspective view of the guide rail 14, FIG. 8 is a side view of the dowel 9, and FIG. 9 is FIG. A sectional view taken along line B' along a plane perpendicular to the longitudinal direction of the guide rail 14, FIG. 10 is an explanatory diagram of the rail mounting hole 8, and FIGS. It is an explanatory view of a fitted state. 1... Printed circuit board guide groove, 4... Rail mounting plate, 8... Rail mounting hole, 9... Dowel, 10...
Slit, 11... Thick part, 12... Sagging part, 1
3... burr part, 14... guide rail.

Claims (1)

[Scope of utility model registration request] In the rectangular parallelepiped printed circuit board guide rail,
A printed circuit board guide groove is provided in a concave shape on one side, and a dowel having a cylindrical shape that widens toward the tip and is integrally molded with the printed circuit board guide rail is provided on the other side, and a spring effect due to deformation is provided at the tip of the dowel. A slot is provided in the center of the dowel parallel to the printed circuit board guide groove so as to form a thick wall portion having a thickness such that the dowel is inserted into the rail mounting hole of the rail mounting plate. A printed circuit board guide rail that can be fixed.