JPH0217507Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a printed board mounting structure for an apparatus in which two printed boards are mounted facing each other.

(b) Background of the Technology In a device in which two printed boards are mounted facing each other, it is desirable that one of the printed boards can be easily removed for maintenance and inspection of the printed boards.

(c) Prior Art and Problems FIG. 1 is a perspective view showing an example of a conventional printed board mounting structure.

In the figure, the substantially Z-shaped spacer fittings 3 have their lower end surfaces in contact with the upper surface of the lower printed board 1, and are fixed with machine screws at positions corresponding to the four corners of the upper printed board 2, respectively. At the four corners of the upper printed board 2,
A hole into which a machine screw 4 is inserted is provided corresponding to the screw hole on the upper end surface of the spacing fitting 3. The lower surfaces of the four corners of the upper printed board 2 are placed on the upper end surface of the spacer fitting 3, and are screwed and fixed with machine screws 4.

Connectors 1a and 2a are mounted on opposing side edges of the lower printed board 1 and the upper printed board 2, respectively. The lower printed board 1 and the upper printed board 2 are electrically connected by a flat cable 5 inserted into the connectors 1a and 2a.

However, in order to inspect the bottom surface of the upper printed board 2 or to maintain and inspect the parts mounted on the upper surface of the lower printed board 1, it is necessary to remove each machine screw 4 and remove the upper printed board 2. This is troublesome, and there is a risk that the machine screws 4 may come off from the upper printed board 2 and be lost.

(d) Purpose of the invention The purpose of the present invention is to provide a printed board mounting structure that eliminates the above-mentioned conventional problems.

(e) Structure of the invention In order to achieve this object, the invention consists of two printed boards 1 and 2, which are mounted facing each other with a predetermined distance between them, and the first printed board 1 and the second printed board 1. Second
In a device in which a cable 5 is attached and connected to connectors 1a and 2a mounted on the opposite side edge of the first printed board 2, the opposing surface of the first printed board 1 is provided with a and two corner windows 6
A fixing fitting 6 having an angle shape when viewed from the side, provided with 1
is fixed in correspondence with the connector 1a, and on the opposite surface of the second printed circuit board 2, a protrusion 73 is provided at one end with a step-shaped corner seat 72 that is inserted into and locked in the corner window 61. In addition, a rotating metal fitting 7, which is substantially channel-shaped in side view, is fixed opposite to the rotating metal fitting 6, and the corner of the second printed board 2 on the opposite side from the cable 5 is
A square seat 72 of a protruding piece 73 is fixed to the other end surface of the pair of spacer fittings 8 fixed to the first printed board 1 by means of easy attachment and detachment, and locks into the corner window 61 of the fixing fitting 6. As a fulcrum, the second printed board 2 can be opened and closed like a door, can be securely held in the open state, and can also be removed by removing the protruding piece 73 from the square window 61.

(f) Embodiments of the invention The invention will be described in detail below with reference to illustrated embodiments.

Figure 2 is a sectional view of one embodiment of the present invention, A, B, C, and D are sectional views when the upper printed board is installed or removed, respectively, and Figure 3 is a sectional view showing important parts of another embodiment. It is. Note that the same reference numerals indicate the same objects throughout the figures.

In FIG. 2, a connector 1a into which a flat cable 5 is inserted is mounted on the upper surface of the lower printed board 1 near one side edge in parallel with the side edge. Reference numeral 6 denotes a fixing metal fitting that is angled in side view. Two square windows 61 are provided in the vicinity of both ends of the vertical plate portion of the fixture 6 in parallel in the horizontal direction. Further, a projection 62 is provided at the upper part of each corner window 61 so as to protrude outward.

Such a fixture 6 is placed inside the connector 1a on the lower printed board 1 in parallel with the connector 1a. The fixing fitting 6 is fixed to the lower printed board 1 by inserting a machine screw 12 into a hole in the horizontal plate part and by screwing a nut into the threaded part of the machine screw 12 protruding from the back surface of the lower printed board 1.

A connector 2a is provided on the upper surface of the upper printed board 2 at a position corresponding to the connector 1a of the lower printed board 1.
has been implemented.

Reference numeral 7 denotes a rotating metal fitting that is substantially channel-shaped when viewed from the side, and is fixed to the lower surface of the upper printed board 2 opposite to the fixing metal fitting 6 with machine screws 11 so that the channel-shaped bottom plate is perpendicular. The portions corresponding to the square windows 61 at both ends of the lower edge of the rotating metal fitting 7 are bent inward in two step-like steps at approximately right angles to form projecting pieces 73. The width of the protruding piece 73 is such that it can be fitted into the square window 61. The step-shaped outer portion of the protruding piece 73 is a square seat 72 that comes into contact with the lower end surface of the square window 61. In addition, with the upper printed board 2 attached, holes 71 into which the respective protrusions 62 are fitted are provided at predetermined positions above the protrusions 73 on the bottom plate of the rotating bracket 7.
is drilled.

The almost Z-shaped spacer fitting 8 has its lower end surface in contact with the upper surface of the lower printed board 1, and machine screws 1 are inserted at positions corresponding to two corners of the upper printed board 2 on the opposite side to the rotating fittings 7.
It is fixed at 2. A machine screw 10 with a sufficiently long threaded portion is screwed into the screw hole on the upper end surface of the spacing fitting 8.

Cut grooves 9 slightly larger than the diameter of the neck of the machine screws 10 are provided at positions corresponding to the machine screws 10 on the upper printed board 2, respectively.

Therefore, when the machine screw 10 is screwed into the spacing metal fitting 8 and the gap between the head and the upper end surface of the spacing metal fitting 8 is sufficiently increased, the cut groove 9 of the upper printed board 2 can be inserted into the machine screw 10 from diagonally upward. It can be fitted into the neck of 10. Therefore, the upper printed board 2 can be fixed to the upper end surface of the spacer 8 or removed from the spacer 8 without removing the machine screws 10.

The fixed state of the upper printed board 2 on the rotating metal fitting 7 side is as shown in (b). The inner surface of the bottom plate of the rotating metal fitting 7 is in close contact with the outer surface of the fixed metal fitting 6. and protrusion 7
3 is inserted into the inside of the square window 61 in a horizontal state, and the square seat 7
2 is in contact with and locked to the lower end surface of the square window 61. In order to further ensure this locked state, the projections 62 are fitted into the holes 71, respectively.

Therefore, the upper printed board 2 can be fixed onto the lower printed board 1 while maintaining a predetermined interval (the height of the spacing fitting 8).

If you want to check the back side of the upper printed board 2 while it is energized, or if you want to check the lower printed board 1, loosen the machine screw 10 while keeping the flat cable 5 inserted as shown in FIG. 2C. Then, using the corner seat 72 as a fulcrum, the upper printed board 2 is raised to a vertical position. As a result, the square seat 72 is supported by the lower end surface of the square window 61, and the tip surface of the protruding piece 73 abuts and locks against the inner surface of the fixture 6. Therefore, the upper printed board 2 is held by the fixture 6 in a substantially vertical state.

To remove the upper printed board 2, as shown in d.
First, after removing the flat cable 5 from the connector 2a, loosen the machine screw 10. Then, the upper printed board 2 is supported in an oblique state, and the protruding piece 73 is pulled out from the square window 61.

Further, the fixing structure of the upper printed board 2 on the side opposite to the rotating metal fitting 7 may be as shown in FIG.

The angle-shaped spacing fitting 13 is fixed at a position corresponding to the spacing fitting 8 in FIG. 2. A protrusion 13a curved inward is provided on the upper part of the spacing fitting 13.

An angled leaf spring 14 is fixed to the lower surface of the side edge of the upper printed board 2. At the tip of the vertical portion of the leaf spring 14, a fitting portion 14a is formed in a crescent shape in side view so as to be press-fitted to the protrusion 13a of the spacing fitting 13 from above. Therefore, just by pressing the upper printed circuit board 2, the leaf spring 14 is moved to the spacer fitting 1.
Crimp to 3.

Note that this invention is not limited to the printed board being in a horizontal position.
This is carried out even in a vertical position.

(g) Effects of the invention As explained above, this invention allows one printed board to be attached and removed, and to be opened and closed like a door.
This printed board mounting structure is not only easy to securely hold in the open state, but also has excellent practical effects in that there is no risk of losing parts.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of a conventional printed board mounting structure, Figure 2 is a perspective view of an embodiment of the present invention, and B, C, and D are when the upper printed board is installed or removed, respectively. FIG. 3 is a sectional view showing important parts of another embodiment. In the figure, 1 is a lower printed board, 2 is an upper printed board, 1a, 2a are connectors, 5 is a flat cable, 3, 8, 13 are spacing metal fittings, 6 is a fixing metal fitting, 6
Reference numeral 1 indicates a square window, 62 a protrusion, 7 a rotating metal fitting, 71 a hole, and 73 a projecting piece.

Claims (1)

[Claims for Utility Model Registration] Two printed boards 1 and 2 are mounted facing each other with a predetermined distance therebetween, and the first printed board 1 and the second printed board 2 are In a device in which a cable 5 is attached and connected to connectors 1a and 2a mounted on opposite side edges, on the opposite surface of the first printed circuit board 1, there are two A fixing metal fitting 6 having an angle shape when viewed from the side and provided with a square window 61 is attached to the connector 1a.
The square window 6 is fixed to the opposite surface of the second printed board 2.
A rotating fitting 7, which is substantially channel-shaped in side view and has a projecting piece 73 provided at one end with a step-shaped square seat 72 that is inserted into and locked in the fixing fitting 6, is fixed opposite to the fixing fitting 6, The corner of the second printed board 2 on the opposite side from the cable 5 is fixed to the other end surface of a pair of spacer fittings 8 fixed to the first printed board 1 by means of easy attachment and detachment. The projecting piece 73 locks onto the square window 61 of the fixing metal fitting 6.
With the corner seat 72 as a fulcrum, the second printed board 2
This printed board mounting structure is characterized in that it can be opened and closed like a door, can be held securely in the open state, and can be removed by removing the protruding piece 73 from the corner window 61.