JPH0634466B2 - Circuit board mounting device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting device for a circuit board used in a telephone exchange, various information devices and the like.

2. Description of the Related Art Generally, when mounting a plurality of circuit boards on a common frame in a telephone exchange or various information devices, a plurality of guide grooves 2 are formed on the upper surface of the frame 1 as shown in FIG. A plurality of circuit boards 3 are inserted into the frame body 1 in parallel with each other along the guide grooves 2 of the above, and the contact pieces 4 formed at the ends of the circuit boards 3 are attached to the back surface of the frame body 1, respectively. It is connected to the connector 5 so as to be electromechanically connected to each other.

However, in all of these types, the circuit board 3 is directly attached to the frame body 1. Therefore, when the attachment is not performed with great care, the circuit board 3 is not There is a possibility that it may come into contact with the circuit board 3 or various electric parts of the above and cause a failure. Further, in this type, various electric parts are exposed, and there is a problem that if the circuit board is dropped at the time of mounting, the circuit board becomes completely defective.

The present invention eliminates the above-mentioned conventional drawbacks, and an object of the present invention is to provide an excellent circuit board mounting device which has a simple structure, is easy to handle, and is safe.

In order to achieve the above-mentioned object, the present invention separately provides a protective case, attaches a circuit board to the protective case, and in this state, attaches the protective case to a frame body in a removable manner. It is composed.

Therefore, according to the present invention, the circuit board is protected in advance by the protective case, and when it is mounted on the frame, the handling thereof is extremely easy. It has an effect of being extremely advantageous in practical use because it is not damaged by collision with.

Embodiment FIG. 1 is a perspective view of an embodiment of a circuit board mounting device of the present invention, and FIG. 2 is a sectional view taken along line AA ′ of the device. First
In FIG. 2 and FIG. 2, 11 is a circuit board.
11 is attached to a protective case 16, and the protective case 16 is attached to a frame 17.

Hereinafter, these mounting structures will be described with reference to FIGS. 3 to 10.

FIG. 3 shows the structure of the circuit unit, and 11 is a circuit board. The circuit board 11 has various circuit components.
12 and plug connector that is a connector for connecting to the mounting board
13 have been implemented. Further, the circuit board 11 is provided with one L-shaped notch 11a on the upper periphery thereof. Reference numeral 14 is an operation switch, and 15 is an external connector for connecting to another circuit board or an external device.

FIG. 4 is a diagram showing the relationship between the protective case 16 made of resin and the printed circuit board 11, and FIGS. 5 and 6 are sectional views of the protective case 16 taken along the line BB ′ and the line CC ′, respectively. Is. Third
In FIG. 6 to FIG. 6, 16a is a concave-shaped board guide groove for guiding the circuit board 11, which is provided so as to face the upper and lower surfaces, respectively. That is, the circuit board 11 is inserted in the direction of the arrow along the guide groove 16a. Reference numeral 16b is a hole formed on the front surface of the protective case 16 for operating the operation switch 14 and the external connection connector 15. Reference numeral 16c is a handle portion when the protective case 16 is handled, and is provided with a slight unevenness so that it can be easily grasped by hand. Reference numeral 16d denotes a convex rib, which is provided above and below the outer circumference of the protective case 16. Convex rib here
Although described later, 16d and the concave rib 16e act as a guide when the protective case 16 is housed in the frame. Reference numeral 16f is a Z-shaped board hinge that utilizes the elasticity of the protective case 16 itself to engage with the notch 11a in the circuit board to completely lock the circuit board 11.

Now protect the circuit board 11 along the board guide groove 16a in the protective case 16
When the board hinge 16f is pushed into the outer shape of the circuit board 11 and lifted up, the insertion amount becomes a certain amount and the notch 11
a faces the board hinge 16f, and at the same time, the board hinge
16f returns to its original state by elastic force and engages with the notch 11a. Since the board hinge 16f is formed in a Z shape, even if the circuit board 11 is pulled out in the opposite direction to the insertion, the board hinge 16f cannot be easily pulled out.

FIGS. 7 and 8 show a state in which the circuit board 11 and the protective case 16 are integrated in this way. If the circuit board 11 needs to be separated from the protective case 16 for some reason, the tip 16f ′ of the board hinge 16f is lightly lifted with a hand or a tool, and the circuit board 11 is moved in the opposite direction to the insertion. You can get out. Also, the board hinge 16f is used for the circuit board 11 at all times.
Since it can be pressed with a constant pressure, it is possible to protect against vibration during transportation. In this case, the hinge for the board
The characteristics of 16f can be arbitrarily set depending on the type of resin material forming the protective case 16, the wall thickness, and the like.

Now, the circuit board 11 and the protective case 16, which are integrated in this way, that is, the circuit unit assembly is housed in the frame body 17 of FIG.

FIG. 10 is a sectional view taken along the line EE 'in FIG. 9th
In FIG. 10 and FIG. 10, 17 is a frame body integrally formed of an elastic material such as resin, and the frame body 17 is a mounting board with screws or the like.
It is fixed at 18. In this embodiment, the frame 17 is provided with eight storage slots a, b, ..., H so that up to eight protective cases 16 can be stored. And 17a is
Grooves provided in the respective slots a, b, ..., H are formed so as to symmetrically face each other vertically. That is, the guide groove 17a has a role of inserting and guiding the convex rib 16d of the protective case 16. Reference numeral 17b is a case hinge that utilizes the elasticity of resin, and a lock portion 17c for locking the protective case 16 is provided at the tip end portion. That is, the lock portion 17c contacts the concave rib 16e provided on the protective case 16 with the same curvature as a certain pressing force. Reference numeral 17d is an inclined portion formed at the opening end of the frame body 17 so that the protection case 16 can be easily inserted. Reference numeral 17e is a circuit unit, which is a heat dissipation hole for dissipating generated heat, and is provided above and below the frame 17 substantially symmetrically.

In addition, in this embodiment, the structure of the frame body 17 is formed in a lattice shape, but this is mechanically provided in order to provide as many heat dissipation holes 17e as possible and to sufficiently withstand the weight of the circuit unit. This is because consideration was given to the formation effect. Reference numeral 17f denotes a slit portion formed on the lower surface of the frame body 17, which is for inserting a metal plate or the like therein so that the weight of the entire circuit unit can be sufficiently supported.

Returning to FIG. 1 and FIG. 2 again, a state in which the protective case 16 is attached to the frame body 17 will be described.

In FIGS. 1 and 2, the protective case 16 having the circuit board 11 built therein is all inserted into the housing slots a, b ... When the protective case 16 is inserted by a predetermined amount, a concave rib 16e formed on the protective case 16 is formed.
Comes into contact with the lock portion 17c of the frame body 17, and
Will be pressed and held at a constant pressure by the lock portion 17c. Up to this point, mainly the protective case 16 and the frame body
Although the operation of 17 is described, there is an operation of electrically connecting the mounting board 18 and the circuit board 11 on the other hand. A receptacle connector 24 is mounted on the mounting board 18, and the plug connector 13 on the circuit board 11 is connected thereto. This connector is connected by the concave ring 16e and the lock part 1 of the frame.
It is performed at the same time when the 7c contacts.

Reference numeral 19 is a housing frame, and a mounting board is mounted on the housing frame 19.
18, auxiliary metal fittings 20 are fixed with screws or the like. Reference numeral 21 is a metal cable duct, which is fixed to the auxiliary metal fitting 20 with screws or the like, and the horizontal portion 21a is inserted into the slit portion 17f of the frame body to safely support the weight of the whole. On the other hand, the cable duct 21 is inclined so that it goes upward as it goes forward.
11. This is because when the protective case 16 is provided in a plurality of upper and lower stages, the heat flow generated from the lower stage is guided to the outside. Reference numeral 22 is a cable for external connection, which has a cable connector 23 at one end and is electrically connected to the external connection connector 15.

As described above, according to the above-described embodiment, the circuit board 11 is first housed in the protective case 16, and the protective case 16 is attached to the frame body 17. Therefore, the circuit board 11 is directly attached to the frame body 17. It has an advantage that it is not necessary to pay close attention when installing and removing, and the handling thereof is remarkably simple. Further, according to the above embodiment, the protective case 16 and the frame body 17 are respectively provided with guide grooves.
16a and 17a are formed so that the circuit board 11 and the protective case 16 can be inserted along the guide grooves 16a and 17a, respectively, and the circuit board 1 can be inserted into the protective case 16 and the frame body 17, respectively.
1. Provide hinges 16f and 17b that lock the protective case 16,
The hinges 16f and 17b lock the circuit board 11 and the protective case 16, so that the circuit board 11 and
The protection case 16 can be attached in any one-touch operation, and has an advantage that the attachment is very simple.

Further, according to the above embodiment, a large number of heat dissipation holes are provided on the upper surface of the frame body 17 and the protective case 16, and moreover, the cable duct 21 is provided so as to be inclined. Therefore, even if heat is generated in the circuit unit, this is effective. As a result, the heat can be dissipated as a whole, and there is an advantage that it can be mounted at a high density and downsized as a whole. Further, according to the above-mentioned embodiment, both the protective case 16 and the frame body 17 are made of synthetic resin, and therefore, there is an advantage that the weight can be extremely reduced as a whole. In the above embodiment, the protective case 16 and the frame body
If a plating process or a general-purpose layer is formed on 17, the circuit unit can be shielded by this, and there is an advantage that mutual magnetic and electrostatic influences can be significantly reduced.

EFFECTS OF THE INVENTION The present invention inserts a circuit board into a guide groove formed in a storage case as is clear from the above-mentioned embodiment, and guides the protective case formed in a frame body while being locked by a hinge formed in the protective case. The protective case is locked by a hinge formed on the frame body along with, and the circuit board is attached to the frame body with the protective case. Since the board is protected by the protective case and attached to the frame in that state, there is no risk that the circuit board will collide with other circuit boards or other objects when it is attached to the frame, and it will not be damaged. It has the advantage of being very simple. When separating the circuit board from the protective case, the tip of the hinge for the board of the protective case can be lifted lightly with your hand or a tool and the circuit board can be pulled out in the direction opposite to the insertion direction. It has the advantage that it can be separated into Further, the U-shaped protection case has an advantage that the heat of the mounting surface of the circuit board and the back surface thereof can easily escape because nothing is provided on the side surface.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a circuit board mounting device of the present invention, FIG. 2 is a sectional view taken along the line AA ′ of FIG. 3, and FIG. 3 is a perspective view of a circuit board used in the same embodiment. The figure is a perspective view of the protective case, and FIGS. 5 and 6 are B- of the case, respectively.
FIG. 7 is a perspective view showing a state in which a circuit board is attached to a protective case, and FIG. 8 is a sectional view taken along line D-D 'of FIG.
Sectional views, FIG. 9 and FIG. 10 are exploded perspective views showing the relationship between the frame body and the protective case, EE ′ sectional views in the same state, and FIG. 11 is a perspective view of a conventional mounting device. 11 …… Printed circuit board, 12 …… Circuit parts, 13 …… Plug connector, 14 …… Operation switch, 15 …… External connection connector, 16 …… Protective case, 17 …… Frame, 18 …… Mounting board,
19 …… Case frame, 20 …… Auxiliary metal fitting, 21 …… Cable duct, 22 …… Cable, 23 …… Cable connector.

Claims (1)

[Claims] 1. A notch provided on an outer peripheral upper portion of a circuit board on which circuit components are mounted, concave ribs provided on upper and lower outer peripheral portions of a U-shaped protective case, and an outer peripheral upper portion of the protective case provided on the circuit substrate. A circuit board hinge that engages with the notch of the board, a lock portion provided at the tip of the case hinge in the upper part of the inner periphery of the frame body and in contact with the concave rib of the protective case, and provided above and below the frame body. A circuit board mounting device having a circuit unit for radiating heat generated by the circuit board mounting device.