JP2687988B2 - Printed circuit board retaining mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card plastic used for extracting a printed circuit board from a mounting unit or the like, and more specifically, a printed circuit board retaining mechanism for retaining the printed circuit board using the card plastic. Regarding

[0002]

2. Description of the Related Art In order to easily pull out a printed circuit board from a mounting unit, a resin card pla 3 is conventionally mounted on a printed circuit board 1 as shown in FIG.
Attached to.

As shown in FIG. 10, the card pla 3 has two substantially triangular holding pieces 3a for holding the printed circuit board 1.
3b, a lever portion 3c provided above the holding pieces 3a, 3b, and an arm portion 3d whose tip side abuts on the inlet side surface 5a of the mounting unit rail 5 when the printed circuit board 1 is pulled out. Cage, both holding pieces 3a, 3b
The holding pieces 3a and 3b are pivotally attached to the printed circuit board 1 which is held by the pins by pins 7.

Then, as shown in FIG. 11, the lever portion 3c
Is operated in the direction of arrow A, the arm portion 3d pushes the inlet side surface 5a, and the card plastic 3 moves in the same direction with the pin 7 as a fulcrum. It is designed to be pulled out in the direction.

However, the card pla 3 is used only for the purpose of pulling out the printed board 1, and has no function of preventing the printed board 1 from being pulled out. Therefore, recently, as shown in FIG. 12, a card plastic 9 with a stopper having a function of preventing the printed circuit board 1 from being pulled out is widely used.

Such a card-with stopper 9 has two holding pieces 9a for holding the printed circuit board 1, a lever portion 9b provided above them, and an entrance side surface 11a of the rail 11 when the printed circuit board 1 is pulled out. The arm portion 9c with which the tip side abuts, and the stopper piece 15 axially attached to the base portion of the holding piece 9a and urged in the direction of arrow C by a built-in spring.
And a corner portion 1a of the printed circuit board 1.
Is pinned between the holding pieces 9a by a pin 7. And
At the time of mounting the printed circuit board 1, the hooks 9d provided at the tips of the two holding pieces 9a engage with the recesses 13 on the rails 11, and
Hook 15 at the end of arm 15a provided on stopper piece 15
b is engaged with the engaging member 17 attached to the printed circuit board 1.

In order to pull out the printed circuit board 1 from the rail 11 as shown in FIG. 13, the lever portion 15c provided on the upper portion of the stopper piece 15 is operated in the direction of arrow D against the spring force. When the lever portion 9b is moved in the direction of arrow E, the engagement between the hook portion 15 at the tip of the arm portion 15a and the engaging member 17 is released, and the engagement between the hook portion 9d and the recess 13 is released. It Then, the tip end side of the arm portion 9c pushes the inlet side surface 11a, and the card plastic 9 moves in the same direction with the pin 7 as a fulcrum, so that the printed circuit board 1 is pulled out in the arrow F direction by the lever principle. There is.

[0008]

However, the above-mentioned card pla 9 has a drawback that the shape and structure thereof are complicated and the manufacturing cost is high. Further, as described above, the card pla 3 shown in FIG. There was no function to prevent the substrate 1 from coming off.

The present invention has been devised in view of such circumstances, and provides a printed circuit board retaining mechanism capable of pulling out the printed circuit board and retaining the printed circuit board by the simple shape and mechanism of the card plastic. The purpose is to do.

[0010]

In order to achieve such an object, the present invention provides two holding pieces which are rotatably attached to a corner portion of a printed circuit board via a pin and hold the printed circuit board, and the holding piece. Of the lever and an arm provided below the gripping piece, the lever is operated in the direction of pulling out the printed circuit board so that the tip of the arm contacts the side surface of the printed circuit board mounting member. In a resin-made card pla that contacts and pulls out a printed circuit board from a mounting surface, a holding piece insertion hole having an inclined portion that is inclined with respect to the drawing direction of the printed circuit board is formed on the mounting surface where the printed circuit board is mounted. In addition, the outer surface of the holding piece is an inclined surface that is inclined similarly to the inclined portion of the holding piece insertion hole, and the holding piece is inserted into the holding piece insertion hole about the pin as a rotation center, thereby the holding piece is inserted. Is obtained by the moved PCB along the outer surface to the inclined portion of the clamping pieces insertion hole so that clamping with clamping pieces.

[0011]

According to the present invention, the printed circuit board is disposed from the side of the mounting surface on the inlet side, and the tip of the arm portion of the card plastic is brought into contact with the side surface on the inlet side, and the lever portion is moved in the mounting direction of the printed circuit board. If moved, the holding piece is inserted into the holding piece insertion hole.

When the lever portion is further moved in the same direction, the outer side surface of the holding piece comes into contact with the inclined portion of the holding piece insertion hole, and the space between the holding pieces is narrowed, and the holding piece forms a wedge. The board is firmly held.

When a person applies a force to pull out the printed circuit board in this state, a force is also applied to the entire card pla in the same direction, so that the gripping piece becomes a wedge and more firmly holds the printed circuit board. However, the printed circuit board is prevented from coming off.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall perspective view of a card plastic used in one embodiment of the present invention, and FIG. 2 is a front view of the card plastic.
The card plastic 19 holds a printed circuit board 21 2
The two holding pieces 23, 25, the lever portion 27 extending above the holding pieces 23, 25, and the curved portions extending downward from the bases of the holding pieces 23, 25 toward the holding pieces 23, 25 side. The provided arm portions 29 are integrally formed of resin, and the card plastic 19 is provided at the corner portion 21a of the printed board 21 arranged between the two holding pieces 23 and 25, as shown in FIG. The holding pieces 23, 25 are pivotally attached by a pin 31. In FIG. 1, reference numeral 33 is a pin insertion hole provided in both holding pieces 23, 25.

The holding pieces 23 and 25 are respectively shown in FIG.
Is formed in a trapezoidal cross section as shown in FIG.
5a is a holding piece insertion hole 3 provided on a rail 35 described later.
The inclined surfaces are inclined similarly to the inclined portions 39 and 41 of FIG. The space between the two holding pieces 23, 25 is formed to be wider than the thickness m of the printed board 21 as shown in FIG.

In FIG. 3, reference numeral 35 denotes a rail for mounting the printed circuit board 21, and the mounting surface of the rail 35 has a trapezoidal shape symmetrical with respect to the center line L of the printed circuit board 21 to be mounted as shown in FIG. Of the holding piece insertion hole 37 is formed, and the holding piece insertion hole 37 has a slanted portion 3 that gradually narrows the holding piece insertion hole 37 in the drawing direction of the printed circuit board 21.
9, 41 are provided. The printed circuit board 21
6 is mounted on the rail 35, the printed circuit board 21 is inserted from the entrance side surface 35a side of the rail 35 as shown in FIG. 6, and the tip of the arm portion 29 of the card plastic 19 is brought into contact with the entrance side surface 35a. , The lever portion 2 as shown in FIG.
When 7 is moved in the direction of arrow G, both holding pieces 23, 25 are inserted into the holding piece insertion holes 37 as shown in FIG. 5, and in conjunction with this, the printed circuit board 21 is moved in the direction of arrow H as shown in FIG. It is designed to move.

When the lever portion 27 is further moved in the direction of the arrow G to further insert the holding pieces 23, 25 into the holding piece insertion hole 37, the connector 43 attached to the insertion side front end 21b of the printed circuit board 21 is moved back. Although it is connected to the connector 47 on the board 45 side, the lever portion 27 is further moved in the direction of the arrow G to move the holding pieces 23 and 25 into the holding piece insertion hole 3
7, the holding piece insertion hole 3 is inserted as shown in FIG.
The outer side surface 2 of each of the holding pieces 23, 25 on the inclined portions 39, 41 of FIG.
When 3a and 25a come into contact with each other, the holding pieces 23 and 25 move in the directions of arrows I and J to reduce the distance between them, and the holding piece 2
The printed circuit board 21 is firmly clamped by the wedges 3 and 25.

Incidentally, when the lever portion 27 is moved in the direction of the arrow G and the printed circuit board 21 is firmly tightened by the holding pieces 23 and 25 to some extent, the holding piece 2 is held as shown in FIG.
The back surfaces 23b and 25b of the reference numerals 3 and 25 respectively have the holding piece insertion holes 3 respectively.
The printed wiring board 21 is prevented from being excessively tightened by coming into contact with the upper side 37a of the connector 7, and the connector 43 is prevented from being unnecessarily loaded.

When a person applies a force in the direction of arrow K as shown in FIG. 7 to pull out the printed board 21 while holding the printed board 21 with the holding pieces 23 and 25 as shown in FIG. Also, a force is applied in the same direction, and as a result, the gripping pieces 23, 25 further move in the directions of arrows I, J to grip the printed circuit board 21 more firmly and prevent the printed circuit board 21 from coming off. ing.

Then, as shown in FIG.
When the lever portion 27 of 9 is moved in the direction of the arrow M, the holding pieces 23, 25 are moved to the positions shown by the chain double-dashed line in FIG. 8 to release the holding state of the printed circuit board 21, and the arm is held in the same manner as in the conventional case. The part 29 pushes the inlet side surface 35a, and the pin 31
Since the card plastic 19 moves in the same direction with the fulcrum as the fulcrum, the fulcrum moves according to the principle of leverage and the printed circuit board 21 is pulled out in the arrow K direction.

Since the retaining mechanism for the printed circuit board 21 according to this embodiment is constructed in this manner, the card plug 19
In order to mount the printed circuit board 21 attached to the corner portion 21a on the mounting surface of the rail 35, as described above, the printed circuit board 21 is inserted from the inlet side surface 35a side of the rail 35, and the arm portion of the card plastic 19 is inserted. 29. If the tip end of 29 is brought into contact with the inlet side surface 35a and the lever portion 27 is moved in the direction of arrow G as shown in FIG. 7, the holding piece insertion hole inserted in the holding piece insertion hole 37 as shown in FIG. The inclined portion 39 of the hole 37,
When the outer side surfaces 23a, 25a of the holding pieces 23, 25 are in contact with 41, the holding pieces 23, 25 move in the directions of arrows I, J to reduce the distance between them, and the holding pieces 23, 25 form a wedge. As a result, the printed circuit board 21 is firmly held.

In this state, a person
When a force is applied in the direction of arrow K as shown in FIG. 7 in order to pull out the card, a force in the same direction is also applied to the entire card pla 19 and the holding pieces 23, 25 are further moved in the directions of arrow I, J to move the printed circuit board 21. Is further firmly held to prevent the printed board 21 from coming off.

Then, as shown in FIG.
When the lever portion 27 of 9 is moved in the direction of arrow M, the holding pieces 23, 25 move to the positions shown by the chain double-dashed line in FIG. 8 and the holding state of the printed circuit board 21 is released.
9 pushes the inlet side surface 35a, and the card plastic 19 moves in the same direction with the pin 31 as a fulcrum, and the fulcrum moves according to the principle of leverage to draw the printed circuit board 21 in the arrow K direction.

Therefore, according to this embodiment, the printed circuit board 21 can be pulled out by operating the card pla 19 in the same manner as in the conventional case, and the card pla 19 has a simpler shape than the card pla 9 shown in FIG. The mechanism makes it possible to prevent the printed circuit board 21 from being pulled out at a low cost.

In the above embodiment, the holding piece insertion hole 37 has a trapezoidal shape having two inclined portions 39 and 41. However, the holding piece insertion hole 37 is not limited to this shape, and the inclined portion 39 is provided on one side, for example. Also, a trapezoidal holding piece insertion hole may be used, or a triangular holding piece insertion hole may be used to achieve the intended purpose as in the above embodiment.

[0026]

As described above, according to the present invention, the printed circuit board can be pulled out by the same operation as the conventional card plastic, and the card plastic has a simpler shape than the conventional card plastic. The mechanism has an advantage that the printed circuit board can be prevented from being pulled out at a low cost.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a card plastic used in an embodiment of the present invention.

2 is a front view of the card plastic shown in FIG. 1. FIG.

FIG. 3 is a side view of the retaining mechanism according to the present embodiment.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a bottom view of the holding piece insertion hole at the time of inserting the holding piece.

FIG. 6 is a side view of the retaining mechanism with the holding pieces of the card plastic removed from the holding piece insertion holes.

FIG. 7 is a side view of the retaining mechanism in a state where the holding piece of the card plastic is inserted into the holding piece insertion hole.

FIG. 8 is a bottom view of the holding piece insertion hole showing a state where the printed board is held by the holding piece.

FIG. 9 is a side view showing a mounted state of a printed circuit board using a conventional card plastic.

FIG. 10 is an overall perspective view of a conventional card plastic.

FIG. 11 is a side view showing a method of extracting a printed circuit board by the card plastic of FIG.

FIG. 12 is a side view showing a mounted state of a printed circuit board using another conventional card plastic.

13 is a side view showing a method of extracting a printed circuit board by the card pla shown in FIG.

[Explanation of symbols]

 19 Card plastic 21 Printed circuit board 23,25 Holding piece 27 Lever part 29 Arm part 35 Rail 35a Rail entrance side 37 37 Holding piece insertion hole 39,41 Inclined part

Claims (1)

(57) [Claims] 1. A gripping piece that is rotatably attached to a corner portion of a printed circuit board via a pin and holds the printed circuit board, a lever portion provided above the gripping piece, and a lever portion provided below the gripping piece. It is made of a resin-made card plastic that pulls out the printed circuit board from the mounting surface by abutting the tip of the arm part to the side surface of the printed circuit board mounting member by operating the lever part in the direction of extracting the printed circuit board. In the mounting surface for mounting the printed circuit board, while forming a holding piece insertion hole having an inclined portion inclined with respect to the drawing direction of the printed board, the outer surface of the holding piece, the holding piece insertion hole The inclined surface is inclined similarly to the inclined portion, and by inserting the holding piece into the holding piece insertion hole with the pin as the center of rotation, the outer side surface of the holding piece is moved along the inclined portion of the holding piece insertion hole. Puri A printed circuit board retaining mechanism using a card plaque, characterized in that the printed circuit board is held by a holding piece.