JPH0325438Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a synthetic resin hinge with a locking mechanism that can be used for various rotating parts such as supporting printed circuit boards of electronic devices and the like.

[Prior Art] Conventionally, when printed circuit boards used in electronic equipment, etc. are stored horizontally on a chassis at predetermined intervals, each printed circuit board is attached to the chassis by a support rod using a spacer or the like. . However, since the printed circuit boards are stacked horizontally at intervals, it is necessary to remove the printed circuit boards one by one when replacing parts during repair or performing maintenance inspections. Therefore, in order to facilitate repairs and inspections, a structure was proposed in which the printed circuit board stored horizontally on the chassis was supported by a hinge, and the printed circuit board could be rotated to a vertical position during repairs. However, with a normal hinge, the printed circuit board it supports cannot be locked in a nearly vertical position on the chassis, making it necessary to work while holding the printed circuit board in hand, which poses the problem of not being able to easily replace electronic components, etc. be.

[Means for Solving the Problems] The present invention has been developed in view of the above points, and is designed to easily and reliably lock a rotating member such as a printed circuit board in a state substantially perpendicular or perpendicular to a fixed part. The purpose of this invention is to provide a synthetic resin hinge that can be used.

Therefore, the present invention is a synthetic resin hinge in which two mounting parts are integrally molded via the hinge part, and when one mounting part is rotated around the hinge part toward the other mounting part, , two walls in which the two mounting parts meet at a substantially right angle position are formed facing each other at an angle of approximately 45 degrees with the hinge part as the center, and the other mounting part and the above-mentioned approximately two mounting parts are formed near the hinge part in the one mounting part. a first hook portion that engages at a right angle position; a second hook portion and a third hook portion that engage with each other at a substantially right angle position are provided on the two attachment portions; An umbrella-shaped protrusion that removably engages with the mounting hole of the printed circuit board is provided, so that the other mounting part can be fixed to the member to be mounted. As a result, for example, a print that is removably engaged by an umbrella-shaped protrusion with one attachment part that is integrated with the other attachment part fixed to the chassis as an attachment member via a hinge part. When the board is rotated to the vertical position, the walls formed facing each other at an angle of approximately 45 degrees around the hinge part align with the two mounting parts to ensure a perpendicular position, and the first hook part is attached to the other mounting part. At the same time, the second hook part engages with the third hook part at the same time or before and after the rotation, and the substantially perpendicular position of both mounting parts is doubly locked, and the printed circuit board is locked. Can be easily and reliably held in a vertical position.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a plan view of the synthetic resin hinge, FIG. 2 shows a front view thereof, and FIG. 3 shows a bottom view thereof. As shown in FIG. 2, this synthetic resin hinge is formed by integrally molding a thin hinge part 1 in the center and mounting parts 2 and 3 on the left and right sides, and is made of nylon, polypropylene, or the like. An umbrella-shaped protrusion 4 is formed on the upper surface of the left mounting portion 2 and is inserted and fixed into a mounting hole of a printed circuit board or the like.
This umbrella-shaped protrusion 4 narrows the area by pressing the umbrella part, fits into the mounting hole of the printed circuit board 21, and expands by releasing the pressure so that it does not come off from the mounting hole. There is. Therefore, when removing the umbrella from the mounting hole, it is only necessary to press the umbrella part and remove it, and the umbrella can be attached and detached. Further, an engaging portion 5 that engages with an edge of a printed circuit board or the like is formed protruding near the hinge portion 1. Ribs 6 are provided on both sides of the upper surface of the right mounting portion 3, and two protrusions 7 protrude from the lower surface of the ribs 6 to engage with engagement holes provided at the mounting position of a chassis or the like to which the hinge is mounted. A hole 8 into which a mounting bolt or the like is inserted is bored in the center of the mounting portion 3. Furthermore, a U-shaped protrusion 9 for positioning is provided protruding from the upper part of the lower surface of the mounting part 3 near the hinge part 1, and is engaged with a notch at the mounting position of a chassis or the like to be fixed. On the other hand, two reinforcing ribs 10 are erected on the lower surface of the left mounting portion 2. When one mounting part 2 is rotated around the hinge part 1 toward the other mounting part 3, the two mounting parts 2 and 3 are connected to each other via the hinge part 1. Two walls that meet at right angles are formed facing each other at an inclination of approximately 45 degrees with the hinge portion 1 as the center. Further, an opening 11 is formed in the center of the hinge part 1, and a first hook part 12 is provided to protrude upward from the mounting part 2 to this opening 11. When rotated, it is configured to engage with the lower surface of the edge 3a (FIGS. 6 and 7) of the mounting portion 3 facing the opening 11. Furthermore, a second hook portion 13 is provided protrudingly on the engaging portion 5 of the left attachment portion 2, and a third hook portion 14 is provided inside one of the ribs 6 of the right attachment portion 3. The second hook portion 13 and the third hook portion 14 are formed so as to engage with each other when the hinge is rotated to a substantially right angle position.
3 is formed downward in FIG. 1, and the third hook portion 14 is formed upward in the same figure.

A synthetic resin hinge with a locking mechanism formed in this manner is used, for example, to rotatably hold a printed circuit board on the chassis of an electronic device. In this case, the chassis 20 is provided with a hole for the protrusion 7 and a hole for the fixing bolt in the center thereof,
Furthermore, a notch and an opening 11 into which the U-shaped protrusion 9 is fitted.
A notch corresponding to the chassis 20 is preformed on the edge thereof, and the mounting portion 3 on the right side of the hinge is attached to the chassis 20.
The bolt is inserted into the hole 8 and tightened and fixed with a nut. On the other hand, the other mounting part 2
The umbrella-shaped protrusion 4 is inserted into the hole of the printed circuit board 21 on the back side of the printed circuit board 21, and the printed circuit board 21
The notch provided on the edge of the mounting part 2 is engaged with the engaging part of the mounting part 2 to be mounted in a fixed position. Printed circuit board 21
is fixed to the chassis at one side edge via this hinge, and the other side edge is fixed horizontally onto the chassis by a mounting screw or the like (not shown).

During failure repair or maintenance inspection, one mounting screw or the like of the printed circuit board 21 is removed, the printed circuit board 21 is rotated to a substantially vertical position via the hinge, and at the same time, the substantially vertical position is locked. At this time, the hinge 2 rotates about 90 degrees around the hinge 1, and the two walls of the mounts 2 and 3 meet to secure a substantially right-angled position, as shown in FIG. In, the first
The hook part 12 enters the back side of the other attachment part 3 from the opening part 11 and engages with the edge thereof, and the second hook part 13 engages with the third hook part 14 as shown by the imaginary line in FIG. engage. In this way, the right angle position of the hinge is doubly locked by the three hooks, and the right angle position is reliably maintained. Further, such a lock is achieved by the engagement of the first hook portion 12, the second hook portion 13, and the third hook portion 14.
The engagement of the first hook portion 12 is performed almost simultaneously.
Alternatively, the engagement of the second hook portion 13 and the third hook portion 14 may be performed one after the other. Note that the lock is released by rotating the printed circuit board back.

It should be noted that the present invention may be modified in various ways without departing from the gist thereof. For example, the lower surface of the mounting portion 3 may be made flat and fixed to the chassis using an adhesive.

[Effects of the invention] As explained above, according to the synthetic resin hinge of the invention, the two walls of the mounting parts 2 and 3 match to ensure a perpendicular position, and the two walls of the mounting parts are connected to the first hook. The hinge is double-locked at a substantially right angle position by the second hook part, the third hook part, and the hinge can be easily and reliably held in the substantially right angle rotational position without using any other members or the like. In particular, by attaching the printed circuit board to the chassis using this synthetic resin hinge, the printed circuit board mounted horizontally on the chassis can be opened to the vertical position and easily locked in the vertical position during repairs. This makes it easy to replace parts. Not only when repairing, but also when assembling electronic equipment, it can be locked in a substantially right-angled position, so the printed circuit board will not easily shake as the electronic equipment moves through the assembly line. , contact with other assembly machines will not occur. Furthermore, even if parts are inserted vertically into the chassis near the printed circuit board, they will not come into contact with the printed circuit board. Therefore, components can be mounted on the chassis at a higher density. In addition, since the umbrella-shaped protrusion removably engages with the mounting hole of the printed circuit board, when the printed circuit board is held in a vertical position, the printed circuit board is stable without coming off or falling out. It can be easily removed when replacing the printed circuit board.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a plan view of the synthetic resin hinge, Fig. 2 is a front view thereof, Fig. 3 is a bottom view thereof, Fig. 4 is a right side view thereof, and Fig. 5 is a plan view of the synthetic resin hinge. 6 is a sectional view taken from FIG. 1, and FIG. 7 is a sectional view taken at a right angle rotation position. 1...Hinge part, 2, 3...Mounting part, 12...
1st hook part, 13...2nd hook part, 14...3rd hook part.

Claims (1)

[Claim for Utility Model Registration] A synthetic resin hinge in which two mounting parts are integrally molded via the hinge part, and one mounting part is rotated around the hinge part toward the other mounting part. In this case, two walls are formed facing each other at an angle of approximately 45 degrees with the hinge portion as the center, and the two mounting portions meet at approximately right angles, and the other mounting portion and the wall are formed in the vicinity of the hinge portion of the one of the mounting portions. a first hook portion that engages at a substantially right angle position; a second hook portion and a third hook portion that engage with each other at the substantially right angle position are provided on the two attachment portions; and one of the attachment portions. 1. A synthetic resin hinge, wherein the hinge is provided with an umbrella-shaped protrusion that removably engages with a mounting hole of a printed circuit board, and the other mounting portion can be fixed to a member to be mounted.