JPH0638282U - Printed circuit board component protection cover support structure - Google Patents

Abstract

(57) [Abstract] [Purpose] In a component protective cover support structure of a printed circuit board that covers electronic components mounted on a printed circuit board housed in a housing of an electronic device, the protective cover can be mounted on the printed circuit board with a simple configuration. It is possible to reduce the number of work steps. A component protection cover support structure for a printed circuit board that covers electronic components mounted on a printed circuit board housed in a housing of an electronic device, wherein side plates are connected in the same direction from both ends of a flat plate, and a plurality of side plates are provided at an edge of the side plate. U-shaped hood that covers the mounted electronic parts with insulation by extending the insertion claws that consist of the hanging pieces and the outwardly folded oblique engaging pieces that are connected to the lower ends of the hanging pieces Is a component protection cover support structure for a printed circuit board, wherein the protective cover is mounted on the printed circuit board with the protective cover by inserting the insertion claw into a hole formed at a position facing the insertion claw of the printed circuit board.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for supporting a component protection cover of a printed circuit board housed in a housing of an electronic device, and in particular, the protective cover can be positioned above the printed circuit board with a simple and inexpensive structure, and the number of work steps can be reduced. The present invention relates to a structure for supporting a component protection cover of a printed circuit board, which is capable of achieving the above.

[0002]

[Prior art]

 For example, in electronic equipment such as boosters for television receivers, many electronic components such as transistors, coils, capacitors, and volumes are soldered onto one printed circuit board to form signal lines from antennas, booster power supplies, etc. An input signal terminal and an output signal terminal for connecting the coaxial cable are provided.

Nowadays, when the density of parts on the printed circuit board has increased, the intervals between parts have become narrower, and when connecting signal lines or operating switches and knobs, other parts come into contact with the driver or hand, As a result, the electrical characteristics may fluctuate or collapse. In particular, electronic components that have been finely adjusted, such as mixed circuits and trap circuits, need to be protected from changes in contact with external objects.

In order to solve such a problem, conventionally, as shown in FIG. 5, for example, a U-shaped hood-shaped protective cover 101 that covers electronic components on the printed board 102 is mounted on the printed board 102. The protective cover 101 has insertion claws 103 extending at appropriate intervals on the edges of both side plates, and the insertion claws 103 are inserted into through holes 104 formed in the printed circuit board 102. It is fixed at 102.

Accordingly, in order to fix the protective cover 101 to the printed circuit board 102, inclusive differentially insertion pawl 103 ₁ into the through hole 104 _first printed board 102 of the protective cover 101 to the print substrate 102, followed by insertion must be plugged claw 103 ₂ into the through hole 104 _2, this case, for the easily bent protective cover 101, it is necessary to engraved notches 105 in the side plate of the protective cover 101.

In addition, especially when connecting a coaxial cable to the input / output terminals on the printed circuit board, it is possible to prevent the driver or hand from touching the electronic parts during the connecting operation, and the output signal is fed back to the amplifier circuit. In order to prevent high frequency signals from short-circuiting between the input and output terminals and oscillating, a U-shaped shield plate is embedded in the printed circuit board.

[0007]

[Problems to be solved by the device]

 Therefore, in order to fix the protective cover 101 to the printed circuit board 102, it is necessary to engrave a cut 105 in the side plate of the printed circuit board 102, or to implant a shield plate in the printed circuit board. There is.

[0008]

[Means for Solving the Problems]

 In view of the above circumstances, the present invention mounts a protective cover on a printed circuit board to be housed in the housing of an electronic device so that the protective cover can be mounted on the printed circuit board with a simple structure and the number of work steps can be reduced. Printed circuit board components that cover the electronic components that are protected by a protective cover support structure, in which side plates are connected in the same direction from both ends of the flat plate, and a plurality of hanging pieces are connected to the edge of the side board and diagonally connected to the lower ends of the hanging pieces. -Shaped protective cover, which is an extension of an insertion claw consisting of a circular engagement piece and covers the mounted electronic components and has an insulating property, is drilled at a position facing the insertion claw of the printed circuit board. This is a component protection cover support structure for a printed circuit board in which the insertion claw is inserted into the hole and the printed circuit board is mounted with a protective cover.

[0009]

[Action]

 Insert the protective cover's insertion claw into the hole of the printed circuit board on which the electronic component is mounted to cover the electronic component and protect the printed circuit board with the protective cover.

[0010]

【Example】

 A support structure for supporting a component cover of a printed circuit board according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an overview of the whole. A printed circuit board 2 is housed in a housing 1 of a high-frequency signal device, and a mixed circuit, a trap circuit, a transistor, and a coil 3 which require precise adjustment are mounted on the printed circuit board 2. Electronic components such as a capacitor 4, a volume and the like are soldered, and a terminal fitting 11 for fixing the coaxial cable, an input signal terminal 5 and an output signal terminal 6 are provided. In the coaxial cable 9, the portion of the shield braid 10 is pressed by the Ω-shaped terminal metal fitting 11 and screwed by the screws 12 and 12 to make it conductive to the reference potential portion of the printed circuit board 2, and the core wire 13 is screwed by the screw 7. It is screwed to the input signal terminal 5.

Here, a protective cover 21 is provided on the printed circuit board 2 in order to prevent external contact with electronic components such as a mixing circuit, a trap circuit, a transistor, a coil 3, a capacitor 4 and a volume mounted on the printed circuit board 2. Mounting. The protective cover 21 is a thin plate material having insulating properties such as synthetic resin, and is formed in a generally U-shaped hood shape as shown in FIG.

That is, the side plates 23 and 24 are connected in the same direction from both ends of the flat plate 22 to form a U-shaped hood shape. Horizontal projecting pieces 25 are provided on the same surface of the flat plate 22 on both sides of the side plate 24 so as to abut against the inner wall of the housing 1, and the core wire 13 of the coaxial cable 9 or the operator's hand hits the side plate 23 of the protective cover 21. At this time, prevent the protective cover 21 from being deformed. An insertion claw 28 including a hanging piece 26 and an outwardly folded oblique engaging piece 27 connected to the lower end of the hanging piece 26 at appropriate intervals is extended to the edge of the side plate 23.

On the other hand, a round hole 29 is formed at a position facing the insertion claw 28 of the protective cover 21 of the printed circuit board 2 as shown in FIG. The insertion claw 28 to be inserted into the round hole 29 is formed into a fan shape 30 in which the dimension L of the upper end of the engaging piece 27 is the same as the diameter of the round hole 29 and becomes narrower toward the lower side. A printed circuit board 2 on which a mixing circuit, a trap circuit, a transistor, a coil 3, a capacitor 4, a volume, etc. are mounted is accommodated in a housing 1, and an input signal terminal 5 and an output signal terminal 6 are provided with a coaxial cable 9 respectively. After the core wire 13 is attached and the electronic components such as the mixing circuit and the trap circuit are precisely adjusted, a protective cover 21 is attached to the printed circuit board 2 in order to prevent external contact.

The protective cover 21 is mounted on the printed circuit board 2 by inserting the insertion claw 28 of the protective cover 21 into the round hole 29 of the printed circuit board 2. When the insertion claw 28 of the protective cover 21 is inserted into the round hole 29 of the printed board 2, as shown in FIGS. 2 and 4, the hanging piece 26 of the insertion claw 28 and the oblique engagement piece 27 pass through the round hole 29. Then, the end edges 31 and 32 of the side plates 23 and 24 of the protective cover 21 come into contact with the upper surface of the print substrate 2 to mount the protective cover 21 on the printed circuit board 2. It is set so that there is a slight gap between the lower surface of the printed board 2 and the tip of the engaging piece 27. Further, since the maximum width L of the sector 30 at the tip of the engaging piece 27 is set to be the same size as the round hole 29, once the insertion claw 28 is inserted into the round hole 29, the insertion claw 28 is inserted into the round hole 29. There is no way out. Furthermore, since the tip of the engaging piece 27 is formed in the fan shape 30, it can pass smoothly when passing through the round hole 29. Further, the round hole 29 may be a rectangular hole.

[0015]

[Effect of device]

 As described above, the present invention is a component protection cover support structure for a printed circuit board that covers electronic components mounted on a printed circuit board housed in the housing of an electronic device, and has side plates extending in the same direction from both ends of the flat plate. It is equipped with a sillity that extends the insertion claw that consists of a plurality of hanging pieces on the edge of the side plate and an outwardly folded oblique engaging piece that is connected to the lower end of each hanging piece. A U-shaped hood-shaped protective cover that covers the mounted electronic component is inserted into the hole formed at a position facing the insertion claw of the printed circuit board, and the protective board is mounted on the printed circuit board. Since it is a component protection cover support structure of, the protection cover can be mounted on the printed circuit board with a simple structure and the number of work steps can be reduced.

Further, since the horizontal protruding piece 25 of the protective cover 21 is in contact with the inner wall of the housing 1, even if the core wire 13 of the coaxial cable 9 or the hand of an operator hits the side plate 23 of the protective cover 21, the protective cover 21 is protected. 21 will not be deformed.

[Brief description of drawings]

FIG. 1 is a perspective view of a specific embodiment of a component protection cover support structure for a printed circuit board according to the present invention.

FIG. 2 is a front view, a plane view, and a side view of a protective cover of the present invention.

FIG. 3 is a plan view of an essential part of a concrete embodiment of the component protection cover support structure for a printed circuit board according to the present invention.

FIG. 4 is an enlarged perspective view of the insertion claw of the present invention.

FIG. 5 is a three-sided view showing a front surface, a plane surface, and a side surface of a conventional protective cover.

[Explanation of symbols]

 1 ... Electronic device casing 2 ... Printed circuit board 3 ... Coil (example of electronic parts) 4 ... Capacitor (example of electronic parts) 22 ... Flat plate 23/24 ... Side plate 31/32 ... Edge 26 ... Hanging piece 27 ... Joint piece 28… Insertion claw 21… Protective cover 29… Round hole

Claims (1)

[Scope of utility model registration request] 1. A component protection cover support structure for a printed circuit board, which covers electronic components mounted on a printed circuit board housed in a housing of an electronic device, wherein side plates are connected in the same direction from both ends of a flat plate to form an edge of the side plate. A U-shaped cover that extends over an electronic component that has an insulating property by extending an insertion claw that includes a plurality of hanging pieces and an outwardly folded oblique engaging piece that is continuously provided at the lower end of each hanging piece A component protection cover support structure for a printed circuit board, wherein a hood-like protective cover is inserted into a hole formed in a portion of the printed circuit board facing the insertion claw to insert the insertion claw, and the printed circuit board is mounted with the protective cover.