JPH05275132A - Connection terminal block with earth terminal - Google Patents

Abstract

PURPOSE:To insert an earth terminal part at the tip part of a contact piece for earthing which is provided in a terminal stand main body into an insertion hole of a terminal stand installation plate and take complete earth even if there are unevenness between both sizes and a gap between them regarding an earth terminal-attached connection terminal block having an earth electric wire. CONSTITUTION:A locking terminal 4 to fix an earth electric wire inserted through an insertion hole 2 and a contact piece 3 for earthing which is formed integrally with the terminal are fixed in a terminal stand main body 1. The shape of an earth terminal part 5 at the tip part of the contact piece 3 for earthing is made to form a set angle and made like a pen tip having a slit in the insertion direction, so that it becomes easy to insert the earth terminal part int an insertion hole 10 of a terminal block installation plate 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-shaped connecting terminal block with a ground terminal having an insertion hole for a ground wire.

[0002]

2. Description of the Related Art FIG. 4 is a cross-sectional view of a conventional connection terminal block with a ground terminal disclosed in Japanese Utility Model Laid-Open No. 60-78581. This terminal block is configured as a quick-connecting terminal block that can be fixedly connected only by inserting an electric wire through the insertion hole, and the cross-sectional shape cut at the insertion hole of the ground electric wire is shown in the figure.

In the figure, 1 is a terminal block main body, 2 is an insertion hole for an earth wire provided in the upper portion thereof, 3 and 4 are grounding contact pieces and locking terminals arranged below the insertion hole 2. ,
Reference numeral 5 is a ground terminal portion at the tip of the ground contact piece 3, 6 is a back cover, 7 is a fixing screw for fixing the ground contact piece 3, and 8
Is a terminal block mounting plate, and 9 is a fixing screw for fixing the terminal block body 1 to the mounting plate 8.

FIG. 5 is a view showing a grounded state of the ground terminal portion 5 of the grounding contact piece 3. As shown in the figure, the ground terminal portion 5 is formed with a predetermined angle, and the mounting plate 8 is provided with an insertion hole 10 into which the ground terminal portion 5 is inserted.

In the connection terminal block with a ground terminal having the above structure, when the ground wire is inserted through the insertion hole 2,
The ground wire is locked by the lock terminal 4 and fixedly connected to the ground contact piece 3.

On the other hand, when the terminal block body 1 is fixed to the mounting plate 8, the ground terminal portion 5 at the tip of the grounding contact piece 3 will be
As shown in FIG. 5, the mounting plate 8 is inserted into the insertion hole 10 and electrically connected to the conductive mounting plate 8.

Therefore, the grounding electric wire is electrically connected to the mounting plate 8 only by inserting the grounding electric wire through the insertion hole 2, and wiring is performed using the electric wire for the purpose of grounding, or the electric wire is connected. It can be grounded without using screws for fixing.

[0008]

However, in the conventional connection terminal block with a ground terminal as described above, there are variations in the size of the ground terminal portion at the tip of the ground contact piece, and the terminal block mounting There are variations in the size of the insertion hole for the ground terminal provided on the board.Therefore, even if the terminal block body is firmly fixed to the mounting plate, there may be a gap between the ground terminal and the insertion hole. There was a problem that I could not get a perfect ground.

The present invention has been made in order to solve the above problems, and it is possible to always obtain a perfect ground even if the dimensions of the ground terminal portion and the insertion hole of the mounting plate vary. It is intended to provide a connection terminal block with a ground terminal.

[0010]

A connection terminal block with a ground terminal according to the present invention is a box-shaped connection terminal block having an insertion hole for a ground wire and is connected to the ground wire inserted through the insertion hole. Equipped with a grounding contact, the tip of this grounding contact is made to protrude from the terminal block body, and the end is formed with a predetermined angle so that it can be engaged with the insertion hole provided in the conductive mounting plate. In addition, a slit is provided to impart elasticity in the insertion direction.

[0011]

In the connection terminal block with a ground terminal of the present invention, the ground terminal portion at the tip of the ground contact piece connected to the ground wire is predetermined to be engageable with the insertion hole provided in the terminal block mounting plate. Since it has an angle of and has a slit in the insertion direction, when the ground terminal part enters the insertion hole of the mounting plate, the elasticity of the slit ensures that the ground terminal part and the mounting plate Connected.

[0012]

1 is a sectional view showing an embodiment of the present invention, in which the same reference numerals as those in FIGS. 4 and 5 designate the same components. In the figure, 1 is a box-shaped terminal block main body, 2 is an insertion hole for a ground wire provided in the main body 1, 3 is this insertion hole 2
A grounding piece connected to the grounding wire inserted from
Reference numeral 4 denotes a lock terminal for fixedly connecting the ground wire to the ground contact piece 3, which is provided with a lock contact piece 11 for locking the ground wire and a wire pressing piece 12 for pressing the locked ground wire. There is.

Reference numeral 5 denotes a grounding terminal portion at the tip of the grounding contact piece 3, which is provided so as to project from the main body 1. 6 is the back cover,
8 is a conductive terminal block mounting plate for mounting the terminal block body 1,
Reference numeral 10 is an insertion hole provided in the mounting plate 8, and the ground terminal portion 5 is inserted into the insertion hole 10.

FIG. 2 is a perspective view showing the shapes of the grounding contact piece 3 and the locking terminal 4. The grounding contact piece 3 and the locking terminal 4 are integrally formed as a band-shaped conductive metal fitting, and are fixed inside the terminal base body 1 by the body 1 and the back cover 6. Further, the ground terminal portion 5 at the tip of the grounding contact piece 3 is processed into a shape like a pen tip of a fountain pen, and has a predetermined angle so that it can be engaged with the insertion hole 10 provided in the mounting plate 8. The slit 13 is formed and provided in the insertion direction, and elasticity like a spring is imparted.

Although not shown, the terminal block body 1 shown in FIG. 1 is provided with insertion holes 2 for the primary and secondary wires in addition to the insertion hole 2 for the ground wire. It can be connected just by inserting it, and it is configured as a quick-connect terminal block.

In the connection terminal block with a ground terminal constructed as described above, when a ground wire is inserted through the insertion hole 2, this ground wire is locked by the locking contact piece 11 of the locking terminal 4, and the wire is also locked. It is pressed by the pressing piece 12 and securely fixedly connected to the grounding contact piece 3.

On the other hand, when the terminal block body 1 is attached to the mounting plate 8, the ground terminal portion 5 at the tip of the grounding contact piece 3 is inserted into the insertion hole 10 of the mounting plate 8 in the direction of arrow A as shown in FIG. Then, the ground terminal portion 5 and the mounting plate 8 are electrically connected. At this time, the ground terminal portion 5 is shaped like a pen tip of a fountain pen, and thus easily engages with the insertion hole 10.
Moreover, since the pen tip-shaped slit 13 becomes narrower and a force to widen it is applied to the processed portion of the insertion hole 10, the ground terminal portion 5 and the mounting plate 8 are reliably connected.

As described above, the ground wire inserted through the insertion hole 2 can be connected to the mounting plate 8 only by fixing the terminal block body 1 to the conductive mounting plate 8, and the ground can be easily grounded. it can. Further, since the ground terminal portion 5 at the tip of the grounding contact piece 3 provided in the main body 1 is formed in a pen tip shape having the slit 13, it is securely connected to the mounting plate 8 as described above. .. Therefore, even if there are variations in the dimensions of the ground terminal portion 5 and the insertion hole 10 of the mounting plate 8, a perfect ground can always be obtained, and a slight gap between the mounting surface of the mounting plate 8 and the terminal block body 1 can be obtained. Even if you can, you can get a perfect ground.

[0019]

As described above, according to the present invention, the tip end of the grounding contact piece provided in the terminal block body is formed at a predetermined angle, and in the insertion direction of the insertion hole of the mounting plate. Since it has a shape with slits, it can always be grounded perfectly even if there are variations in the dimensions of the ground terminal at the tip or the insertion hole of the mounting plate. Even if there are some gaps between them, it is possible to obtain a perfect ground.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing the shapes of the grounding contact piece and the lock terminal of FIG.

FIG. 3 is an explanatory diagram showing a connection state of the ground terminal portion of FIG. 2 to a mounting plate.

FIG. 4 is a cross-sectional view showing a conventional example.

5 is an explanatory diagram showing a grounded state of the ground terminal portion of FIG. 4. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal block main body 2 Insertion hole 3 Grounding contact piece 4 Locking terminal 5 Grounding terminal part (tip part) 8 Terminal block mounting plate 10 Insertion hole In addition, the same code | symbol shows the same or corresponding part.

Claims (1)

[Claims] 1. A box-shaped connection terminal block having an insertion hole for a ground wire, comprising a grounding contact piece connected to the grounding wire inserted through the insertion hole, and a tip portion of the grounding contact piece. The terminal block is made to project from the main body, its tip is formed with a predetermined angle so that it can be engaged with the insertion hole provided in the conductive mounting plate, and a slit is provided to impart elasticity in the insertion direction. A connection terminal block with a ground terminal.