JPH06111861A - Earth device - Google Patents

Abstract

PURPOSE:To improve productivity by making mounting to the case body of a circuit board and connection work easy. CONSTITUTION:At the vicinity of one end in the longitudinal direction of the base board part 4 of a case bottom body 2 a support part 8 is formed by cut and erecting and the tip of the support part 8 is bent to form a connection part 9 having a mounting hole 11 at its center. At a circuit base board 13 on which various electrical parts are mounted, a through-hole 14 where two jumper wires 15 larger in dia. than a connection part 9 are layed in parallel is formed at the circuit base board 13. In the through-hole 14, the connection part 9 of which top is flush with that of the circuit base board 13 is inserted while making it abut against the jumper wires 15. While a rivet 18 is inserted between the jumper wires 15, the top 17 of the rivet 18 is abutted against the jumpers 15 and inserted in to the mounting hole 11 of the connection part 9, and the rivet 18 is caulked, and connection is fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grounding device for connecting a terminal portion of a substrate to a connecting portion of a member to be attached by attaching means.

[0002]

2. Description of the Related Art Conventionally, as a grounding device of this type, for example, a structure shown in FIGS. 5 and 6, that is, a circuit board 51 on which an electric circuit of a lighting device (not shown) is formed, is made of metal. A configuration is known in which the case body 52 having a rectangular parallelepiped shape is housed.

In the earthing device shown in FIGS. 5 and 6, the circuit board 51 has various electric parts (not shown) attached thereto so as to form an inverter circuit, for example.
Two electrically conductive elongated wire-shaped jumpers 53 are provided in parallel at one end of the circuit as ground terminals.

Further, the circuit board 51 is provided with screw holes 54 located between the jumpers 53, and screws 56 are inserted into the screw holes 54 via washers 55 that come into contact with the jumpers 53. . On the other hand, the case main body 52 is formed by cutting and raising a connecting portion 59 to which the circuit board 51 is attached, and a screw hole 60 through which the screw 56 is inserted is formed near the tip of the connecting portion 59.

Then, the screw hole 54 of the circuit board 51 and the screw hole 60 of the connecting portion 59 of the case body 52 are aligned with each other, a screw 56 having a washer 55 is inserted into the screw holes 54 and 60, and a nut 61 is inserted. Screw the washer 55 into contact with the jumper 53 so that the washer 55 and screw
56, and the jumper 53 is electrically connected to the connecting portion 59 via the nut 61, and the circuit board 51 is connected to the case body 52.
The structure is mechanically attached to.

[0006]

However, in the grounding device having the above structure, the screw hole 54 of the circuit board 51 and the screw hole 60 of the connecting portion 59 of the case body 52 are aligned with each other, and the screw with the washer 55 is attached. Since the 56 is inserted into the screw holes 54 and 60 and the nut 61 is screwed to make the electrical connection, there is a problem that the workability becomes complicated.

Further, the case body 52 and the circuit board 51 are thermally expanded by the heat generated when electricity is applied to an electric component attached to the circuit board 51, especially an electromagnetic device (not shown). Therefore, the circuit board 51, the jumper 53 of the circuit board 51, and the connection portion 59 of the case body 52 are clamped and fixed by the washer 55 attached to the screw 56 and the nut 61 to which the screw 56 is screwed. Due to repeated thermal expansion and contraction over a long period of time, there is a problem that the screwing is loosened, resulting in a defective electrical connection. Further, this defective connection may cause a problem.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a grounding device which can improve workability and can securely electrically connect a substrate to a mounted member.

[0009]

The grounding device of the present invention comprises:
In a grounding device that attaches a board provided with a terminal portion to a connection portion provided on a member to be attached by the attachment means, the terminal portion has an insertion hole through which the connection portion is inserted, and the insertion hole. A conductor that is erected, the connection portion is formed to project so as to be inserted into the insertion hole, the connection portion is inserted into the insertion hole, and the conductor and the connection portion are brought into contact with each other, It is fixed by mounting means.

[0010]

In the grounding device of the present invention, the connecting portion of the member to be mounted is inserted into the insertion hole of the substrate so that the connecting portion and the substrate are substantially flush with each other, and the terminal portion provided in the insertion hole is directly connected to the connecting portion. Since they are electrically abutted and connected by a mounting member, the work of mounting and connecting the board is easy and the workability is improved, and the conductor installed in the insertion hole and the connecting portion are directly connected, and Since the substrate is not located between the body and the connecting portion, it is possible to prevent defective connection due to repeated thermal expansion and contraction of the substrate due to heat generated by energization, and it is possible to ensure reliable electrical connection for a long period of time.

[0011]

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

In FIGS. 1 and 2, reference numeral 1 denotes a case body as a member to be attached, and the case body 1 is, for example,
A case bottom body 2 made of a steel plate which is attached to a chassis of a lighting fixture (not shown) and which has been subjected to vibration damping processing and which has a substantially U-shaped cross section, and is fitted to the case bottom body 2 And a case lid (not shown), which has a rectangular parallelepiped shape.

The case bottom body 2 includes a bottom plate portion 4, a side plate portion 5 bent substantially vertically from one side in the longitudinal direction of the bottom plate portion 4, and a side plate portion 5 from the other side in the longitudinal direction of the bottom plate portion 4. And a joint portion 6 that is substantially parallel to the side plate portion 5 and is narrower than the side plate portion 5 and has a substantially U-shaped cross section.

Further, a supporting portion 8 is formed in the vicinity of one end of the bottom plate portion 4 in the longitudinal direction and is cut and raised substantially vertically in the longitudinal direction above the folding direction side of the side plate portion 5, and further, the supporting portion 8 is formed. The front end of is bent substantially vertically in parallel with the bottom plate portion 4 to form the connecting portion 9. A circular mounting hole 11 is formed in the center of the connecting portion 9.

On the other hand, 13 is a circuit board as a board. This circuit board 13 is formed to have substantially the same size as the bottom plate portion 4 of the case bottom body 2, and various electric parts (not shown) are attached by soldering or the like. . Further, the circuit board 13 is formed with an insertion hole 14 that is substantially square and has a slightly larger diameter than the connecting portion 9 at a position corresponding to the connecting portion 9 of the case bottom body 2 on one end side in the longitudinal direction.

Further, in the insertion hole 14, two elongated metal wire-like jumpers 15 made of a metal serving as a conductor are provided so as to extend substantially in parallel along the longitudinal direction of the circuit board 13 at a predetermined interval. A terminal portion is formed.

The circuit board 13 is the circuit board.
The connection portion 9 of the case bottom body 2 is inserted into the insertion hole 14 of the circuit board 13
The upper surface of the connecting portion 9 is flush with the upper surface of the connecting portion 9, and the upper surface of the connecting portion 9 contacts the jumper 15. Further, a rivet 18 as a mounting means having a head portion 17 having a diameter larger than that between the jumpers 15 is inserted into the mounting hole 11 of the connecting portion 9 via the jumpers 15 and caulked and fixed to the jumper 15 and the connecting portion 9. Are connected. Then, substantially parallel to the bottom plate portion 4 of the case bottom body 2, it is mounted on a mounting base (not shown) provided on the case bottom plate 2 and screwed.

Next, the mounting operation of the above embodiment will be described.

First, the circuit board 13 in which various electric parts are attached and the jumper 15 is formed in the insertion hole 14 is formed, and the case bottom body 2 is arranged so that the jumper 15 is located on the upper surface of the circuit board 13.
It is placed on the mounting base of the case bottom body 2 substantially in parallel with the bottom plate portion 4. When the circuit board 13 is placed, the circuit board 13
The connection portion 9 of the case bottom body 2 is inserted into the insertion hole 14 so that the upper surface of the circuit board 13 and the upper surface of the connection portion 9 are flush with each other and the upper surface of the connection portion 9 contacts the jumper 15.

Next, the circuit board 13 is screwed to the mounting base of the case bottom body 2, the rivet 18 is inserted between the jumpers 15, and the lower end of the head 17 of the rivet 18 is brought into contact with the jumper 15 until the connecting portion 9 is reached. Insert it into the mounting hole 11 and crimp the rivet 18,
The jumper 15 and the connecting portion 9 are connected and fixed.

Then, a case lid body (not shown) is joined to the case bottom body 2 to which the circuit board 13 is attached so as to cover the upper part of the case bottom body 2 to form a rectangular parallelepiped shape.

According to the above configuration, the insertion hole 14 of the circuit board 13
The connecting portion 9 of the case bottom body 2 is inserted into the insertion hole 14 of the circuit board 13 so that the circuit board 13 and the connecting portion 9 of the case bottom body 2 are flush with each other.
The jumper 15 installed in the insertion hole 14 of the circuit board 13.
Is directly contacted with the connecting portion 9 and connected and fixed with the rivet 18, so that the work of attaching and connecting the circuit board 13 to the case bottom body 2 can be facilitated, the productivity can be improved, and the production can be automated. In addition, the jumper 15 and the connecting portion 9 are directly connected, and the circuit board 13 is provided between the jumper 15 and the connecting portion 9.
Is not located, it is possible to prevent connection failure due to repeated thermal expansion and contraction of the circuit board 13 due to heat generated by energization, and reliable electrical connection can be achieved for a long period of time.

Next, another embodiment will be described with reference to FIGS. 3 and 4.

In FIGS. 3 and 4, reference numeral 21 denotes a case main body as a member to be attached. The case main body 21 is mounted on a chassis of a lighting fixture (not shown) as in the embodiment shown in FIGS. The case bottom body 22 is made of a steel plate and has a substantially U-shaped cross section, and a case lid body (not shown) fitted into the case bottom body 22 is formed into a rectangular parallelepiped shape.

The case bottom 22 includes a bottom plate portion 24, a side plate portion 25 bent substantially vertically from one side in the longitudinal direction of the bottom plate portion 24, and a side plate portion 25 from the other side in the longitudinal direction of the bottom plate portion 24. And a joint portion 26 that is substantially parallel to the side plate portion 25 and is narrower than the side plate portion 25, and has a substantially U-shaped cross section.

Further, a support portion 28 is formed in the vicinity of one end of the bottom plate portion 24 in the longitudinal direction and is cut and raised substantially vertically to the longitudinal direction above the bending direction side of the side plate portion 25, and further, this support portion is formed.
The tip of 28 is parallel to the bottom plate 24 and is bent almost vertically
29 are formed. A rivet portion 31 as a mounting means that is cylindrical and protrudes upward is formed substantially at the center of the connecting portion 29.

On the other hand, 33 is a circuit board as a board. The circuit board 33 is formed to have substantially the same size as the bottom plate portion 24 of the case bottom body 22, and various electric parts (not shown) are attached by soldering or the like. . Further, in this circuit board 33, a substantially square insertion hole 34 having a diameter slightly larger than that of the connection portion 29 is formed at a position corresponding to the connection portion 29 of the case bottom body 22 on one end side in the longitudinal direction. In the vicinity of the peripheral edge of the insertion hole 34, two elongated through holes 35 whose longitudinal direction is along the width direction of the circuit board 33 are formed on the longitudinal direction side of the circuit board 33.

In the insertion hole 34, a jumper 37 made of a metal plate as a conductor is provided so as to extend along the longitudinal direction of the circuit board 33. The jumper 37 has an annular contact portion 39 having an inner hole 38 having a diameter slightly larger than the outer peripheral diameter of the rivet portion 31 of the connecting portion 29, and a diametrically outward direction from the outer peripheral edge of the contact portion 39. The locking portion 41 is molded at two places, and this locking portion is formed.
The tip of 41 is bent almost vertically in the same direction, and
42 is formed. Then, the through hole 35 of the circuit board 33 is arranged so that the abutting portion 39 of the jumper 37 is located substantially in the center of the through hole 34.
The claws 42 are respectively inserted into the
The terminal portion is formed by being installed in the insertion hole 34 of 33.

In this circuit board 33, the connecting portion 29 of the case bottom body 22 is inserted into the insertion hole 34, and the connecting portion 29 is connected to the upper surface of the circuit board 33.
Is flush with the top surface of the connection part 29 and the top surface of the connection part 29 is jumper 37
Inner hole of the contact portion 39 of the jumper 37 so as to contact the lower surface of the
The rivet portion 31 of the connecting portion 29 is inserted into the connection portion 38. Further, the tip of the rivet portion 31 is crimped by a crimping tool 44 or the like, and the jumper 37 and the connecting portion 29 are connected and fixed. Then, substantially parallel to the bottom plate portion 24 of the case bottom body 22, it is mounted on a mounting base (not shown) provided on the case bottom plate 22 and screwed.

Next, the mounting operation of the above embodiment will be described.

First, the circuit board 33 in which various electric parts are attached and the jumper 37 is formed in the insertion hole 34 is installed, and the case bottom 22 is placed so that the jumper 37 is located on the upper surface of the circuit board 33.
It is placed on the mounting base of the case bottom body 22 substantially parallel to the bottom plate portion 24. When the circuit board 33 is placed, the circuit board 33
So that the upper surface of the circuit board 33 and the upper surface of the connection portion 29 are flush with the insertion hole 34, and the upper surface of the connection portion 29 abuts on the jumper 37. While inserting the rivet portion 31 of the connecting portion 29 into the, the connecting portion 29 of the case bottom body 22 is inserted.

Next, the circuit board 33 is screwed to the mounting base of the case bottom body 22, the tip of the rivet portion 31 is caulked, and the jumper 37 and the connection portion 29 are connected and fixed.

Then, a case lid body (not shown) is joined to the case bottom body 22 to which the circuit board 33 is attached so as to cover the upper part of the case bottom body 22 to form a rectangular parallelepiped shape.

According to the above configuration, the connecting portion 29 of the case bottom body 22 is inserted into the insertion hole 34 of the circuit board 33 so that the circuit board 33 and the connecting portion 29 of the case bottom body 22 are flush with each other. In order to electrically connect the jumper 37 installed in the insertion hole 34 of the board 33 to the direct connection part 29 and caulk the rivet part to fix the connection,
The installation work and connection work of the circuit board 33 to the case bottom body 22 are easy, and the manufacturing efficiency can be improved by automating the manufacturing, and the jumper 37 and the connecting portion 29 are directly connected to each other. Since the circuit board 33 is not located in the circuit board 33,
Connection failure due to thermal expansion and contraction of can be prevented, and reliable electrical connection can be achieved for a long time. Furthermore, the strength of the jumper 37 can be improved and the workability of mounting the jumper 37 on the circuit board 33 can be improved by forming only one jumper 37 from a metal plate.

The embodiment shown in FIGS. 1 and 2 above,
Further, in the embodiment shown in FIGS. 3 and 4, the rivet 11 and the rivet portion 31 are caulked and explained as the attaching means, but screwing or the like is also possible. Further, the attachment means may be a non-conductive material such as synthetic resin.

[0036]

According to the grounding device of the present invention, the connecting portion of the member to be attached is inserted into the insertion hole of the substrate so that the connection portion and the substrate are substantially flush with each other, and the terminal portion provided in the insertion hole is provided. Since it directly contacts the connection part and is connected by the mounting member for connection, the work of mounting and connecting the board is easy and the workability is improved, and the conductor and the connection part installed in the insertion hole are directly connected. Since the board is connected and the board is not located between the conductor and the connecting portion, connection failure due to repeated thermal expansion and contraction of the board due to heat generated by energization can be prevented, and reliable electrical connection can be achieved for a long time.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a grounding device according to an embodiment of the present invention, in which a part of a case lid before joining is cut away.

FIG. 2 is a partially cutaway sectional view for explaining a connection fixing state of the jumper and the connecting portion.

FIG. 3 is an exploded perspective view of a grounding device according to another embodiment of the present invention, in which a part of the case lid body before being joined is cut away.

FIG. 4 is a partially cutaway sectional view for explaining a connection fixing state of the jumper and the connecting portion.

FIG. 5 is an exploded perspective view in which a part of a case lid body before joining is cut away, showing an embodiment of a conventional grounding device.

FIG. 6 is a partially cutaway sectional view for explaining a connection fixing state of the jumper and the connecting portion.

[Explanation of symbols]

 1,21 Case body as mounted member 9,29 Connection part 13,33 Circuit board as substrate 14,34 Insertion hole 15,37 Jumper as conductor 18 Rivet 31 as mounting means Rivet part as mounting means

Claims (1)

[Claims] 1. A grounding device for mounting a board provided with a terminal portion to a connecting portion provided on a member to be attached with the terminal portion by a mounting means, wherein the terminal portion has an insertion hole through which the connecting portion is inserted. A conductor that is installed in the insertion hole, the connection portion is formed to project so as to be inserted into the insertion hole, the connection portion is inserted into the insertion hole, and the conductor and the connection portion A grounding device characterized in that they are brought into contact with each other and fixed by the mounting means.