JP2001189579A - Printed substrate support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase support intensity of a printed substrate by firmly fixing a guide rail for slidably supporting at least one end edge of the printed substrate to a frame, and solve inconveniences in cost or a part procurement face by using a type having versatility as a mother board connector, in a support structure of the printed substrate provided with the frame for supporting both longitudinal end edges of the printed substrate mounted on a mother board from a direction perpendicular to an upper face of the mother board. SOLUTION: In a printed substrate support structure provided with frames 2, 3 for supporting each end edge in a state of be respectively perpendicular to two end edges counter to a rectangular printed substrate 1, a support face 2a for supporting one end edge 1a of the printed substrate is provided in at least the one frame 2, and also a detachable guide rail 10 is assembled to the support face, and the guide rail has a groove 12 for fitting and supporting the one end edge of the printed substrate, and the one end edge of the printed substrate is fitted and supported by all the lengths of the groove.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a support structure for a printed circuit board mounted on an electrical unit of various electronic devices.
In particular, the present invention relates to an improvement in a guide rail that guides both front and rear edges of a printed circuit board when the printed circuit board is inserted from above so as to be orthogonal to an upper surface of a motherboard having a connector on the upper surface.

[0002]

2. Description of the Related Art Various OA equipment, electronic equipment such as communication equipment,
Not only electrical equipment, but also mechanical equipment that is electrically controlled is equipped with an electrical component, and the electrical component usually has a configuration in which a plurality of printed circuit boards are arranged and accommodated in parallel. The electrical component is configured such that, for example, when a printed circuit board is inserted from the outside of the electrical component to the inside, a connector provided at an edge of the printed circuit board is fitted to a connector such as a motherboard located at the innermost part. In order to reliably connect the printed circuit board to the connector, a guide rail that slidably guides two edges of the printed circuit board is provided in the electrical component. The board support mechanism of an electronic device described in Japanese Patent No. 2882603 has a width of a printed board in an electrical component of a type in which a printed board is inserted from above so as to be orthogonal to an upper surface of a motherboard having a connector on the upper surface. A guide rail for guiding one edge in the direction is formed in an L-shape, and a slide portion provided on a bottom side of the L-shaped guide rail is fitted into a groove-shaped slide guide portion provided on both side surfaces of the connector. ing. However, in this conventional example, the motherboard connector is special, and general-purpose products cannot be used.
It is disadvantageous in parts supply. Also, if the bottom slide part is slid along the grooved slide guide part on the motherboard connector side to adjust the position of the guide rail, stress may be applied to the motherboard connector and the solder holding the connector may peel off. is there. Also, the guide rail is merely fixed by fitting the bottom slide portion thereof to the slide guide portion of the motherboard connector, and the guide portion that contacts and supports the printed circuit board is not fixedly supported at all. Due to the structure, there is a possibility that printed boards may collide with each other and be damaged when an impact or the like is applied.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and has been made in view of the above, and has a frame provided with a frame for supporting both longitudinal edges of a printed circuit board mounted on a motherboard from a direction orthogonal to the upper surface of the motherboard. In a board supporting structure, a guide rail for slidably supporting at least one edge of the printed board is firmly fixed to a frame, thereby providing a printed board supporting structure with increased printed board supporting strength. The purpose is. It is another object of the present invention to use a versatile type motherboard connector to eliminate problems in terms of cost and parts procurement.

[0004]

As described above, according to the first aspect of the present invention, there is provided a printed circuit board provided with a frame for supporting each of the rectangular printed circuit boards in a state orthogonal to the two opposing edges thereof. In the support structure, at least one of the frames is provided with a support surface for supporting one edge of the printed circuit board, and a detachable guide rail is attached to the support surface, and the guide rail is connected to one edge of the printed circuit board. And a groove for fitting and supporting the one end of the printed circuit board by the entire length of the groove. According to the invention of claim 2, guide pins protrude from both ends in the longitudinal direction of the bottom surface where the guide rail engages with the support surface of the frame, and the guide pins are provided at corresponding positions on the support surface. A sleeve provided with a support hole for inserting and supporting the same is projected from the back side of the support surface. According to the invention of claim 3, an adjuster screw portion is protruded at an appropriate position on the bottom surface of the guide rail, and a round hole for receiving the adjuster screw portion is formed through the support surface of the frame. The adjusting screw was inserted into the round hole with the compression coil spring arranged on the outer periphery of the adjusting screw, and the adjuster nut was fastened and fixed to the adjusting screw projecting from the round hole to the back side of the support surface. It is characterized by the following. According to the invention of claim 4, the adjuster nut has a flange on the outer periphery of the cylindrical nut main body, and has a notch for locking on a part of the flange,
On the back side of the support surface of the frame, a projection is provided on the periphery of the round hole so as to be able to engage with the locking notch. According to the fifth aspect of the present invention, a snap-fit type stopper is provided on the bottom surface of the guide rail, and a locking window is provided on the support surface of the frame for receiving and locking the stopper. It is characterized by. According to the invention of claim 6,
The outer peripheral surface of the cylindrical nut body of the adjuster nut is knurled.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. FIG. 1 is a configuration diagram of a main part of an electric unit of an apparatus including an electric unit such as an electronic apparatus, and shows a supporting structure in which a plurality of rectangular printed circuit boards 1 are supported in parallel. This printed board support structure is a rectangular printed board 1
Are provided on the frames 2, 3 supporting the respective edges 1a, 1b in a state orthogonal to the two opposite edges 1a, 1b, the motherboard 5 having the motherboard connector 6 on the upper surface, and the frame 3. Bracket 7 and frame 2
And a guide rail 10 and the like which are removably arranged on the support surface 2a on the front surface side. A connector 1A is provided on the lower side of the printed board 1, and the connector 1A is configured to be fitted with the motherboard connector 6 when the printed board 1 is assembled along the guide rails 10 in a posture orthogonal to the upper surface of the motherboard 5. . A support surface 2a for supporting one edge of the printed circuit board is provided on the surface of one frame 2, and a detachable guide rail 1 is provided on the support surface 2a.
0 is assembled. The other frame 3 may have the same configuration as the configuration of the frame 2 described later. However, in this example, the case where the support structure of the present invention is applied to the frame 2 will be mainly described. The guide rail 10 is made of resin or the like, and one end edge 1a of the printed circuit board 1 is provided.
A rail body 11 having a groove 12 for fitting and supporting
Guide pins 13 projecting from both ends in the longitudinal direction of the bottom surface 11a with which the rail body 11 engages with the support surface 2a of the frame 2
And a screw part 14 for an adjuster projecting from the center of the bottom surface 11a in the longitudinal direction, and two pairs of snap-fitting prevention claws 15 projecting from the bottom surface of the guide rail.
The groove 12 is formed at one end 1 of the printed board by its entire length.
The length in the longitudinal direction is set so that the entire length or a part of “a” can be fitted and supported. The width and depth of the groove are also set so as to firmly support the one edge 1a.
The detachment preventing claw 15 is, for example, the rail body 1 as illustrated.
A pair of elastically deformable plate-like members 15a protruding from both edges in the width direction of the bottom surface 11a and claw portions 15b protruding outward from the distal end thereof.
It is configured to be elastically deformable in the width direction of 1a. A sleeve 20 having a support hole 21 for inserting and supporting each guide pin 13 is provided on the support surface 2a of the frame 2 so as to protrude from the support surface surface toward the support surface rear surface, and a round portion for receiving the adjuster screw portion 14 is provided. The adjuster screw portion 14 is inserted into the round hole 22 with the compression coil spring 16 inserted and arranged around the outer periphery of the adjuster screw portion 14, and the support surface 2 a of the support surface 2 a is formed from the round hole 22. An adjuster nut 23 is provided on the adjuster screw portion 14 protruding to the back side.
Is fastened and fixed.

The adjuster nut 23 has a flange 23b on the outer periphery of a cylindrical nut main body 23a, and has a notch 23c for locking at a part of the periphery of the flange 23b. On the back surface side of the support surface 2a of the frame 2, a projection 24 is provided on the periphery of the round hole 22 so as to be able to engage with the locking notch 23c. The outer peripheral surface of the cylindrical nut body 23a of the adjuster nut 23 is subjected to knurling 23a '. The support surface 2a of the frame 2 is provided with a locking window 25 for receiving the disengagement preventing claw 15 and locking the tip claw 15b. That is, the pair of disengagement preventing claws 15 are elastically deformed in a direction approaching each other when being pressed into the locking window 25 from the tip, and return to the original shape after passing through the thickness of the locking window 25. Since the opening is expanded, the claw portion 15b is prevented from being caught on the rear edge of the locking window 25 and the guide rail 10 is prevented from dropping from the frame 2. The mounting operation is one touch. By inserting the guide pin 13 into the support hole 21 of the sleeve 20, the positioning and fixing are ensured and play is eliminated. The adjuster screw portion 14 is inserted from the locking window 25, and the female screw portion of the adjuster nut 23 is screwed and fastened to the adjuster screw portion 14 protruding from the locking window 25 to the rear side. 14 can be fixed to the frame 2. For example, four notches 23c for locking are provided at 90 ° intervals on the periphery of the flange 23b of the adjuster nut 23, and 90 ° intervals are provided on the back side of the support surface 2a of the frame 2 at the peripheral edge of the round hole 22. Notch for locking 2
A projection 24 engageable with 3c is provided. Notch 2 for each locking
By fitting 3c with each protrusion 24, relative rotation between the adjuster screw portion 14 and the adjuster nut 23 is eliminated, and the adjuster nut 23 does not fall off or loosen.

Next, the guide rail 1 for the frame 2
In the mounting procedure of No. 0, the compression spring 16 is first fitted to the outer periphery of the adjuster screw portion 14 of the guide rail 10, and then the adjuster screw portion 14 is inserted into the support hole 12 from the distal end. An adjuster nut 23 is screwed to the tip. Alternatively, the guide pin 13 may be inserted into the sleeve 20 after fitting a small-diameter compression spring (not shown) around the outer periphery of the left and right guide pins 13. On the other hand, the snap-fit type anti-separation claw 15 is press-fitted into the locking window 25, and is prevented from falling off by the locking force of the claw portion 15b. As described above, the guide rail 10 has no play due to the engagement between the guide pin 13 and the sleeve 20, and the entire guide rail 10 is perpendicular to the support surface 2 a of the frame 2 by rotating the adjuster nut 23. You can slide. That is, by adjusting the amount of tightening of the adjuster nut 23, the support surface 2a can be adjusted.
By adjusting the protrusion amount of the guide rail with respect to the edge of the printed circuit board, the engagement strength with the edge 1a of the printed circuit board can be adjusted.
Alternatively, when the guide rail 10 protrudes too much from the support surface 2a, it is not possible to smoothly insert the printed circuit board into the groove 12 from above, so that the protruding length can be reduced. Unlike the conventional example described above, the present invention does not require any modification to the motherboard connector 6, which is advantageous not only in terms of manufacturing cost but also in terms of parts procurement. The guide rail 10 is in close contact with the support surface 2a of the frame 2 on its entire bottom surface, or the support surface 2a is provided by a guide pin 13, an adjuster screw portion 14, or the like.
Since the protrusion amount is fixed firmly at a predetermined position by adjusting the amount of protrusion from the printed circuit board, there is no backlash, and problems such as collision of printed circuit boards due to impact are eliminated. In addition, detachment prevention claw 1
Due to the presence of 5, the guide rail 10 does not fall off the frame 2. Further, since the knurled portion is provided on the outer peripheral surface of the adjuster nut, mounting and adjustment can be performed without using a tool such as a screwdriver.

[0008]

As described above, according to the present invention, in a printed board supporting structure provided with a frame for supporting both longitudinal edges of a printed board mounted on the motherboard from a direction orthogonal to the upper surface of the motherboard, By firmly fixing the guide rail that supports at least one end edge slidably to the frame, the support strength of the printed circuit board can be increased, and by using a versatile type as the motherboard connector, the cost is reduced. And problems in parts procurement can be eliminated. That is, according to the first aspect of the present invention, a detachable guide rail is assembled to a frame supporting surface that supports one edge of the printed board, and the guide rail has a groove that fits and supports one edge of the printed board. Since the one end edge of the printed board is fitted and supported by the entire length of the groove, the printed board can be firmly fixed to the frame supporting surface. According to a second aspect of the present invention, guide pins are provided at both ends in the longitudinal direction of the bottom surface where the guide rail engages with the frame support surface, and support holes for inserting and supporting the respective guide pins are provided at corresponding positions on the support surface. Since the provided sleeve is provided so as to project from the support surface to the support surface rear side, an excellent effect is exhibited in preventing the guide rail from rattling with the frame support surface. According to a third aspect of the present invention, the adjuster screw portion is provided in a state in which the adjuster screw portion provided on the bottom surface of the guide rail is inserted into the round hole provided on the frame support surface, and the compression coil spring is arranged on the outer periphery of the adjuster screw portion. Is inserted into the round hole, and the adjuster nut is fastened and fixed to the adjuster screw portion protruding from the round hole to the back surface side of the support surface. The amount of protrusion of the guide rail can be finely adjusted, and moreover, it can be firmly supported at the position of protrusion after the adjustment. For this reason, the support strength of the guide rail with respect to the printed circuit board inserted between the frames can be adjusted. According to the invention of claim 4, the adjuster nut has a flange on the outer periphery of the cylindrical nut main body, a notch for locking provided on a part of the flange, and a round hole on the back side of the support surface of the frame. A projection which can be engaged with the locking notch was provided on the periphery. For this reason, after finely adjusting the amount of fastening of the adjuster nut, there is no problem that the adjuster nut rotates and loosens. According to the fifth aspect of the present invention, a snap-fit type stopper is provided on the bottom surface of the guide rail, and a locking window is provided on the support surface of the frame for receiving and locking the stopper. No more falling off the frame. In the invention of claim 6, since the outer peripheral surface of the cylindrical nut main body of the adjuster nut is subjected to knurling, the protrusion of the guide rail can be reduced by manually operating the adjuster net without using a tool such as a screwdriver. Can be adjusted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a printed board support mechanism according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a configuration on a guide rail and a frame side.

FIGS. 3A and 3B are a cross-sectional view and a rear view showing a state in which a guide rail is fixed to a frame.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Rectangular printed circuit board, 1a, 1b edge, 1A connector, 2 and 3 frame, 2a support surface, 5 motherboard, 6 motherboard connector, 7 bracket, 1
0 guide rail, 11 rail body, 11a bottom,
12 groove, 13 guide pin, 14 screw part for adjuster, 15 stopper preventing claw, 20 sleeve, 21 support hole, 22 round hole, 23 nut for adjuster, 23a
Cylindrical nut body, 23a 'knurled part, 23
b Flange, 23c Notch for locking, 24 protrusion, 2
5 Locking window.

Claims (6)

[Claims] 1. A printed circuit board supporting structure comprising a frame for supporting each edge in a state orthogonal to two opposing edges of a rectangular printed circuit board, wherein at least one frame supports one edge of the printed circuit board. A support surface is provided, and a detachable guide rail is assembled to the support surface, and the guide rail has a groove for fitting and supporting one edge of the printed circuit board. A printed board support structure, wherein said one end edge of the printed board is fitted and supported. 2. A guide pin protrudes from both ends in a longitudinal direction of a bottom surface where the guide rail engages with a support surface of the frame, and the guide pins are inserted and supported at corresponding positions of the support surface. 2. The printed circuit board support structure according to claim 1, wherein a sleeve having a support hole is provided so as to project from a back surface side of the support surface. 3. An adjuster screw portion is projected from an appropriate position on the bottom surface of the guide rail, and a round hole for receiving the adjuster screw portion is formed through the support surface of the frame. The adjusting screw is inserted into the round hole in a state where the compression coil spring is arranged on the outer periphery, and the adjusting nut is fastened and fixed to the adjusting screw protruding from the round hole to the back side of the support surface. The printed circuit board support structure according to claim 2. 4. The adjuster nut has a flange on an outer periphery of a cylindrical nut main body, a notch for locking is provided on a part of the flange, and the round hole is provided on a back surface side of a support surface of the frame. 4. The printed circuit board supporting structure according to claim 3, wherein a protrusion engageable with said locking notch is provided on a peripheral edge of said printed circuit board. 5. A snap-fit type anti-separation claw protrudes from the bottom surface of the guide rail, and a locking window is provided on a support surface of the frame for receiving and locking the anti-separation claw. The printed circuit board support structure according to claim 1, 2, 3, or 4. 6. The printed circuit board support structure according to claim 4, wherein a knurling process is performed on an outer peripheral surface of the cylindrical nut body of the adjuster nut.