JPH0818257A - Fixing apparatus for printed board - Google Patents

Abstract

PURPOSE:To provide a fixing apparatus for printed boards mounted upright on a chassis, that is simple enough to improve manufacturing and easy to handle. CONSTITUTION:A pair of holding frames 5, 6 are oppositely erected from a base 2, having a latching means at the bottom, to form a holding area to receive a printed board B. A swing arm 8 is extended upward from the outside surface of one holding frame 5 with a thin hinge area 9 included midway. A latching spring piece 10 is formed on the top of the swing arm 8, which is folded and molded into a V shape and extended toward the other holding frame 6 at a right angle. A latching lug 11 is formed on the outside surface of the free rocking end 10a of the latching spring piece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixture for fixing a printed board mounted inside an electric device such as a television receiver.

[0002]

2. Description of the Related Art Various printed circuit boards are incorporated in electric equipment such as a television receiver. Depending on the type of the board, the incorporated board may be replaced in order to enhance or change the function of the equipment. , May increase. Therefore, in this type of printed circuit board, there is a demand for a fixture that can be easily assembled to the device and can be easily removed. Based on such a request, the applicant of the present invention has previously proposed a fixing device capable of easily attaching and detaching a printed circuit board by using Japanese Patent Application No. 2-126562.

[0003] The fixture according to this already proposed, especially the third,
The fixture shown in the fourth embodiment is a locking arm that pivotally pivotally attaches to the main body via a shaft after inserting the side edge portion of the printed circuit board into the mounting groove portion provided in the columnar main body, that is, the holding portion. The V-shaped locking claw provided at the free end of the printed circuit board is engaged with a notch engaging portion provided on the printed circuit board so as to prevent the printed circuit board from coming out of the mounting groove, and the locking can be fixed. By disengaging the retaining pawl from the notch engaging portion, the above engagement is released and can be removed.

[0004]

As described above, in the fixing device, the printed circuit board can be easily attached / detached by hooking the engaging claw provided on the engaging arm to the notch engaging portion of the printed circuit board or removing the engaging claw. In addition, it is possible to perform this attachment / detachment operation with one hand, which has an excellent advantage that is not possible with the same type of fixtures up to that time. However, the difficulty of this fixing device is that the locking arm pivotally pivotally attached via the shaft forming the hinge part is formed separately from the main body, and this must be assembled into one body. Therefore, the cost was inevitably high. In view of this point, the present invention aims to improve the productivity by particularly assembling the parts by omitting the assembling step after the parts are molded, and at the same time, improving the fixing of the product by strengthening the product. Is to provide. In addition, since the present invention holds the printed circuit board held in the mounting groove of the conventional body,
An object of the present invention is to provide a fixing device for a printed circuit board, which can be fixed by locking the locking claws for fixing the circuit board without directly hooking it on the circuit board.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention has a holding frame forming a groove-shaped holding portion for receiving an edge portion of a printed circuit board and a notch engagement provided on the printed circuit board. The rocking arm is integrally formed with a locking spring piece to be hung on the portion, and a thin hinge portion is provided at the base end of the rocking arm to allow the rocking arm to freely swing and the locking spring. The piece is adapted to be freely engaged and disengaged with the notch engaging portion.

More specifically, the fixing device of the present invention is characterized in that a pair of holding frames are erected in opposite directions from a base having locking means on the lower surface to form a holding portion for receiving a printed circuit board. At the same time, a swing arm is extended upward from the outer surface of one of the holding frames via a thin hinge portion, and V is projected from the upper part of the swing arm to the other holding frame at a right angle.
Provided is a fixture for a printed circuit board, wherein a locking spring piece formed by bending in a letter shape is extended, and a locking claw is provided on an outer surface of a free swinging piece of the locking spring piece. Especially.

Further, according to the present invention, a locking spring piece extending from the upper part in the normal state of the swing arm is supported at a position retracted from above the holding portion to one holding frame side, and when the printed circuit board is fitted, Another object of the present invention is to provide a fixture for a printed circuit board, characterized in that the locking spring pieces are not in the way.

Further, according to the present invention, the rocking arm and the locking spring piece extending from the upper part of the rocking arm are formed in a plate shape having a required width, while the rocking arm is a connecting base with a holding frame. Another object of the present invention is to provide a fixture for a printed circuit board, which is characterized in that the hinge portion is formed by thinning the end portion in the transverse direction.

Still further, according to the present invention, one holding frame forming the holding portion of the printed circuit board is provided with an extension whose tip end is higher than the other holding frame, and the extension is free to receive the locking spring piece. Another object of the present invention is to provide a fixture for a printed circuit board, characterized in that a locking window for engaging the locking claw of the rocking piece is provided.

[0010]

[Operation] According to the present invention, as is apparent from the above-mentioned configuration, a holding frame having a holding portion for receiving a printed circuit board,
Since the swing arm for locking the received substrate is integrated through the thin hinge portion, the whole can be simultaneously molded, the number of parts can be reduced, and its assembly can be omitted. . Further, in the fixture of the present invention, an extension portion is provided on one of the pair of holding frames forming the holding portion, and a locking window is provided in this extension portion to directly engage the locking spring piece of the swing arm. The notch engaging portion of the printed circuit board does not directly bear the burden of latching the locking claw. Further, in the fixture of the present invention, when the swing arm is connected to the holding frame via the thin hinge portion, and when the locking spring piece is hooked on the notch engaging portion, the hinge portion is bent and engaged. Therefore, the locking spring piece is hooked in a normal state where a restoring force is generated, so that a stable engagement state can be obtained. Next, the present invention will be specifically described with reference to the illustrated embodiments, and the features thereof will be clarified.

[0011]

[Embodiment 1] FIGS. 1 to 5 show a first fixing device according to the present invention.
FIG. FIG. 1 is a perspective view of a fixture before use, FIG. 2 is a front view of the fixture, FIG. 3 is a plan view of the same, FIG. 4 is a perspective view of a use state in which a printed circuit board is fixed, and FIG. It is a front view of the used state,
Reference numeral 1 indicates a fixture, A indicates a chassis of electric equipment such as a television receiver, and B indicates a printed circuit board assembled to the chassis.

The fixture 1 is molded from a thermoplastic synthetic resin, such as a nylon resin, which is a resin material having appropriate rigidity and elasticity. Here, a pair of holding frames 5, which are provided with anchoring means 3 in the form of an anchor on the lower surface of a base 2 formed in the shape of a thick plate and on the upper surface of which a holding portion 4 for receiving the printed circuit board B is formed.
6 is set up.

The locking means 3 is formed in a hook shape by symmetrically extending a pair of locking pieces 3b, 3b from the tip of a support plate 3a vertically extending from the lower surface of the base 2 to form an anchor shape. The base 2 is locked by being inserted into a rectangular mounting hole a formed in A so that the base 2 can be fixed to the upper surface of the chassis.

On the other hand, the pair of holding frames 5 and 6 which stand upright from the upper surface of the base stand with a sufficient distance between them to receive the thickness of the printed circuit board B, and a holding portion between them. Four
To form. The holding portion 4 is formed in a U-shaped cross section by closing the one side edges of the holding frames 5 and 6, and the side edge portion of the printed circuit board B is guided from the upper opening portion to the one side edge opening portion 4a. It can be held so that it can receive and sandwich.

Of the two holding frames 5 and 6, a reinforcing rib 7 is provided on the outer surface along one side edge of one holding frame 6 over the upper surface of the base 2, and the other one. A swing arm 8 extends on the outer side surface of the holding frame 5. The swing arm 8 is a holding means for restraining the printed board B received in the holding portion 4 from coming out, and is adjusted so as to be protruded slightly outward from the middle of the height of the outer surface of the plate-shaped holding frame 5. It is provided so as to extend obliquely upward.

The swing arm 8 is formed in a strip shape here, and a portion near the base end portion is laterally cut into a groove shape to form a hinge portion 9, and the hinge portion 9 is used as a branch. It is designed to be flexible. Further, the swinging free end reaching the upper end of the holding frame 5 is integrally provided with a locking spring piece 10 having a substantially V shape so as to project at a right angle toward the holding frame, and the swinging spring piece freely swings. A locking claw 11 is provided on the outer surface of the piece 10a.

When the hinge portion 9 is bent so that the swing arm 8 is placed along the holding frame 5, the tip of the locking spring piece 10 goes beyond the upper end of the other holding frame 6 to the side thereof. It is formed to have a protruding length, and similarly, the locking claws 11 provided on the free swinging piece 10a can also extend beyond the upper end of the holding frame 6. The free swinging piece 10a is adapted to be elastically swingable around the tip of the locking spring piece 10, that is, the V-shaped folded portion as a fulcrum, and the locking claw 11 is provided at its free end.
There is provided a release piece 12 for disengaging.

A pair of fixtures having the above-described structure are prepared for fixing one printed circuit board B. Each of them is shown in Figure 1.
As shown in FIG. 3, the mounting means 3 is attached by inserting the locking means 3 into a rectangular mounting hole a formed in the chassis A. Since the two fixtures naturally face the opening 4a of the holding portion 4 and receive both side edges of the substrate B,
It will be mounted in a rising shape with an interval according to the width of the board. In the embodiment, in order to specify the orientations of the two fixing tools, the rectangular mounting hole a is provided with small notches on two opposite sides so as to face each other.
The insertion direction can be specified by receiving both edges of a.

After mounting the fixture of the present invention on the chassis in this manner, the print base A is raised from above the holding portion 4 and the edge portion is fitted. Then, when the lower edge comes into contact with the upper surface of the base 2, the swing arm 8 is bent around the hinge portion 9 as a fulcrum, and the locking spring piece 10 is inserted into the engaging portion b which is formed as a notch in the edge portion of the printed circuit board. Thus, the locking claw 11 is hooked on the edge of the engaging portion to be attached.

As shown in the figure, when the swing arm 8 is in a normal state, the locking spring piece extends obliquely upward with respect to the holding frame 5 standing upright and extends at a right angle from the upper end. 1
When the printed circuit board B is fitted, the locking spring piece 10 is set so that 0 is set back from the position right above the holding portion 4.
So that it does not interfere with the insertion. At the same time, when the board B is fitted into the holding portion 4 with the tip of the locking spring piece 10 substantially facing the upper end of the holding frame 5, the engaging spring piece 10 faces the proximity position of the engaging portion b provided therein.

For this reason, when the printed circuit board B is mounted on the fixture as described above, the printed circuit board is supported above the holding portion 4 so that the printed circuit board B is dropped in as far as it can be fitted without any obstacle. When the outer side surface of the swing arm 8 or the tip end of the release piece 12 is pressed to the holding frame side with the fingers after fitting together, the locking spring piece 10 enters the notch engaging portion b and is automatically engaged. The stopped state is obtained and the installation is completed.

[0022]

Second Embodiment FIGS. 6 to 15 show a second embodiment of the present invention. In this embodiment, one holding frame 6 of the holding frames 5 and 6 facing each other forming the holding portion 4 described in the first embodiment.
An extension portion 13 is extended from the upper end of the printed circuit board B, and a locking window 14 for receiving the locking spring piece 10 of the swing arm 7 extended from the other holding frame 5 is formed in the extension portion to stop the printed circuit board B. This is an example in which the locking claw 11 of the locking spring piece 10 is hooked on the edge of the locking window 14 to attach the printed circuit board when it is attached.

The second embodiment is different from the first embodiment in that the extension 13 is formed and the locking window 14 is opened in the extension, and the other points are the same as the first embodiment. Since it is the same as the example, the same components are designated by the same reference numerals and the description thereof is omitted.

In this second embodiment, two fixtures 1 are prepared for fixing the printed circuit board B to the chassis A, as understood by sharing the basic structure. The holder 4 is mounted with the opening 4a facing each other. And after mounting printed circuit board B
In the case of fixing the base plate, just as in the above-mentioned case, the both edges of the board B are fitted so as to be dropped from above the holding portions 4 of both fixing tools, and the lower edge of the board abuts on the base 2. By the way, the swinging arm 8 is swung around the hinge portion 9 as a fulcrum, and the locking spring piece 10 is inserted into the notch engaging portion b and fixed.

In this embodiment, the locking spring piece 10 is inserted into the notch engaging portion b of the printed circuit board which fits in the engaging portion 4 and is inserted into the engaging window 14 so that the free rocking piece is engaged. This is done by hooking the locking claw 11 provided on the locking window 10a to the edge of the locking window 14. That is, this second
In this embodiment, the locking claw 11 is not directly hooked on the printed circuit board B but is hooked on the extension 13 of the other holding frame 6 so that the printed circuit board is held by the locking spring piece 10 penetrating the engaging part b. Therefore, the repulsive force of the locking spring piece 10 does not act directly on the printed circuit board B.

The fixture for fixing the printed circuit board in this manner resists the spring force of the locking spring piece 10 and releases the release piece 12.
, Press the locking claw 11 to the engaging portion b of the printed circuit board B.
Alternatively, the locking can be released by removing the locking window 14 from the edge and pulling it out. This releasing operation can be performed by pressing the tip of the releasing piece 12 with a finger and pulling the releasing piece 12 in the pulling-out direction at the same time. The printed circuit board is fitted to the holding portion 4 so as to face the upper end of the one holding frame 5 and is provided.

[0027]

The present invention has been described in detail with reference to the embodiments.
As is apparent from the above description, in the fixture of the present invention, the swing arm provided with the locking spring piece is integrally formed with the holding frame via the thin hinge portion, so that the assembly after the formation is unnecessary and the manufacturing is easy. There is an advantage to be. Further, since the fixing spring of the present invention is in the normal state, the locking spring piece provided on the swing arm faces the notch engaging portion of the printed circuit board to be inserted into the holding section. Not only it does not get in the way, but after inserting it, the locking spring piece can be automatically hooked by pushing it in by swinging the swinging arm, and the work can be done efficiently. Further, in the fixing tool with the locking window according to the present invention, the locking spring piece is locked to the locking window, and the locking claw is not directly engaged with the notch engaging portion, so that the printed circuit board is damaged. It is effective for fixing thin printed circuit boards.

[Brief description of drawings]

FIG. 1 is a perspective view of a fixture according to the present invention before use.

FIG. 2 is a front view of a fixture.

FIG. 3 is a plan view of a fixture.

FIG. 4 is a perspective view illustrating a usage state of a fixture.

FIG. 5 is a front view of a use state, which is shown in a partial cross section.

FIG. 6 is a perspective view of a fixture before use showing another embodiment.

FIG. 7 is a front view of the fixture shown in FIG.

FIG. 8 is a plan view of the fixture shown in FIG.

9 is a right side view of the fixture shown in FIG.

10 is a left side view of the fixture shown in FIG.

FIG. 11 is a bottom view of the fixture shown in FIG.

FIG. 12 is a rear view of the fixture shown in FIG.

FIG. 13 is a perspective view illustrating a usage state of the fixture shown in FIG.

FIG. 14 is a front view of the fixing tool shown in FIG. 6 in a partially cross-sectional use state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixture 2 Base 3 Locking means 4 Holding part 4a One side opening part of a holding part 5,6 Holding frame 8 Swing arm 9 Thin hinge part 10 Locking spring piece 10a Free swinging piece of locking spring piece 11 Locking Claw 12 Release Piece 13 Extension 14 Locking Window A Chassis a Mounting Hole B Printed Circuit Board b Notch Engagement

Claims (4)

[Claims] 1. A pair of holding frames are installed upright in a confronting manner from a base having locking means on the lower surface to form a holding portion for receiving a printed circuit board, and a thin hinge portion is formed from the outer surface of one holding frame. The swinging arm is extended upwardly through the swinging arm, and a locking spring piece formed by bending and bending in a V-shape at a right angle from the upper part of the swinging arm toward the other holding frame is extended. A fixture for a printed circuit board, characterized in that a locking claw is provided on the outer surface of the free swinging piece. 2. The swing arm according to claim 1, wherein the swinging arm normally supports a locking spring piece extending from an upper portion of the swinging arm at a position retracted from above the holding portion to one holding frame side. Printed circuit board fixture. 3. The oscillating arm and the locking spring piece extending from the upper part of the oscillating arm are formed in a plate shape having a required width, and the oscillating arm serves as a holding frame. A fixture for a printed circuit board, characterized in that a hinge portion is formed by thinning a connection base end portion in a transverse direction. 4. The extension member is provided at an upper end portion of one holding frame forming a holding portion of the printed circuit board, and a locking spring piece is provided at the extension portion on the free swinging piece. A fixture for a printed circuit board, characterized in that a locking window for engaging the locking claw is provided.