JP3303561B2 - Earth spring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth spring device used for audio and video equipment such as a magnetic recording / reproducing apparatus, a tape recorder and a television receiver.

[0002]

2. Description of the Related Art Conventionally, in electrical products and the like, as a measure to protect electrical components in the event of an overvoltage or the like, for example, it is necessary to connect a printed circuit board to a product ground to establish a ground. Will be needed.

[0003] A conventional earth spring device will be described below. FIG. 3 is a perspective view showing a conventional earth spring device. In FIG. 3, reference numeral 1 denotes an earth spring device, which is composed of two legs 1a bent upward and an arm 1b having elasticity and bent downward. Reference numeral 2 denotes a printed circuit board (hereinafter referred to as a P plate), 3 denotes a frame of an electric device, and 4 denotes a bottom plate provided below the frame 3 and used as a product ground.

The operation of the conventional earth spring device configured as described above will be described below.

The foot 1a of the earth spring device 1 is inserted into the hole 2a of the P plate 2 from the back side and soldered to the P plate 2, so that the earth spring device 1 is electrically connected to the P plate 2 and Fixed. Earth spring device 1 is P plate 2
The arm 1b of the earth spring device 1 is inserted into the hole 3a of the frame 3 while being fixed on the frame 3 and installed on the frame 3. Also, the bottom plate 4
Is moved in the direction of arrow B and is brought into contact with the frame 3 so that the arm portion 1b is sandwiched between the frame 3 and the bottom plate 4, so that the arm portion 1b comes into electrical contact with the bottom plate 4 and P The conduction between the plate 2 and the bottom plate 4 can be obtained, and the ground can be taken.

[0006]

However, in such an earth spring device, since the earth spring device is fixed to the P plate by soldering or the like, it takes much time and labor when assembling and disassembling, and the workability is deteriorated. There was a problem.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a simple and reliable earth spring device which does not require soldering of the earth spring device to a P plate. .

[0008]

According to the present invention, there is provided a frame having a first hole and a second hole disposed close to the first hole on a surface thereof; A printed circuit board installed on the upper part of the frame, a bottom plate installed on the lower part of the frame, and a first hole inserted through the first hole into contact with the printed circuit board and the other end in contact with the bottom plate and An earth spring device for electrically connecting a bottom plate to a bottom plate, wherein the protrusion is urged upward and the tip of the spring contacts a printed circuit board, and the protrusion is urged downward and inserted through a first hole. An arm contacting the bottom plate, a claw engaged with the second hole, and a third provided so as to be able to release the engagement between the claw and the second hole from the back surface thereof. And a hole.

[0009]

With this configuration, the claw portion formed by the ground spring device can be attached to the hole of the frame by one-touch without soldering the ground spring device to the P plate, and the claw is formed through the hole formed in the other arm portion. The part can be opened from the back side and easily removed, and the structure is simple and workability can be improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a sectional view thereof. 1 and 2, reference numeral 1 denotes an earth spring device, which is integrally formed with a triangular and elastic projection 1a at its tip.
Is formed of a claw portion 1b for fixing the frame to the frame 3, an opening 1c capable of releasing the engagement of the claw portion 1b, and an arm portion 1d formed integrally with the opening 1c. 2 is P board, 3
Reference numeral denotes a frame of an electric device, and reference numeral 4 denotes a bottom plate used for a product ground.

The operation of the earth spring device of the present invention configured as described above will be described below.

First, the earth spring device 1 has its arm 1
d is inserted into the hole 3a of the frame 3 and is inserted into the back side of the frame 3 as shown by the arrow C. Next, the hook 1 b is hooked on the hole 3 b of the frame 3, and the earth spring device 1 is fixed to the frame 3.

Next, when the P plate 2 is mounted on the frame 3 on which the earth spring device 1 is mounted by moving it in the direction of arrow D, the triangular tip 1e of the projection 1a of the earth spring device 1 as shown in FIG. Contacts the solder surface of the P plate 2,
Due to the elasticity of the bent portion 1f, an upward force is always applied to ensure contact. Similarly, when the bottom plate 4 is moved from the direction of arrow E to the frame 3 on which the ground spring device 1 is mounted, the edge of the end surface of the arm portion 1d comes into contact with the bottom plate 4 and the arm portion 1d by the bent portion 1g. The downward force is always exerted due to the elasticity of the contact, ensuring reliable contact. As a result, the P plate 2 and the bottom plate 4 on both sides of the frame 3 can be electrically connected, and the ground can be obtained.

When removing the earth spring device 1 from the frame 3, a thin object such as a finger is pressed through the opening 1c of the earth spring device 1 through the hole 3b of the frame 3 and the claw portion 1b of the earth spring device 1 is pressed from behind. And the hole 3
Since the engagement with b can be released, it can be easily removed.

Incidentally, if it is formed integrally with the earth spring device 1 and has a claw shape which can be easily attached to the frame 3 and a shape which can reliably contact the edge with the arm portion having elasticity to the P plate 2 and the product ground 4. For example, the shapes and the numbers of the protrusions 1a, the claws 1b, and the arms 1d shown in the above embodiment are not particularly limited.

As described above, according to the present embodiment, the projection 1a and the arm 1d of the earth spring device 1 are provided with elasticity, respectively, and come into contact with the P plate 2 and the bottom plate 4 when they are attached, so that they are electrically connected. Since connection is possible, connection can be made without using solder, so that disassembly and assembly can be easily performed.

[0018]

As described above, according to the present invention, the ground spring device can be easily attached to and detached from the frame by providing the claw portion.
There is no need to fix the ground spring device by soldering, etc.
In addition, by contacting the tip of the elastic projection with the P plate and the arm with the bottom plate, the frame is securely sandwiched between the P plate on both sides and the product ground, and the ground can be taken. The structure is simple and workability can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an earth spring device according to an embodiment of the present invention.

FIG. 2 is a sectional view of an earth spring device according to an embodiment of the present invention.

FIG. 3 is a perspective view of a conventional earth spring device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Earth spring device 1a Projection 1b Claw 1c Opening 1d Arm 2 Printed circuit board 3 Frame 3a Hole 3b Hole 4 Bottom plate

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 4/64

Claims (1)

(57) [Claims] 1. A frame having a first hole and a second hole disposed close to the first hole on a surface thereof, a printed circuit board installed on an upper portion of the frame, and the frame. A bottom plate installed at a lower portion of the first hole, the first hole is inserted into the bottom plate, the tip of the bottom plate contacts the printed board, and the other end contacts the bottom plate to electrically connect the printed board and the bottom plate. An earth spring device to be connected, wherein the protrusion is urged upward and the tip thereof contacts the printed circuit board, and the projection is urged downward and is inserted into the first hole to contact the bottom plate. Arm portion, a claw portion that engages with the second hole portion, and an opening portion that is provided so that the engagement between the claw portion and the second hole portion can be released from the back surface thereof. Earth spring device characterized by the above-mentioned.