JPH04284378A - Terminal board - Google Patents

Abstract

PURPOSE:To obtain a terminal board that can make the connection pressure constant between the terminal board and a cable so as to prevent heating and firing. CONSTITUTION:A terminal board 12 on which a connection arm 13 and an elastic arm 14 between which a cable 3 is sandwiched, are formed on both ends, is enclosed in an insulating case 1 of bottomed box shape, on which a cable inserting hole 4 is provided on one end 2, and an opening part 5 on the other end, while the opening part 5 of the case 1 is closed by a lid 8 having a cable inserting hole 9. Even under a situation where the cable 3 is pushed between the connection arm 13 and the elastic arm 14 from the cable inserting holes 4, 9, by supporting the back surfaces of the connection arm 13 as well as of the elastic arm 14 which are opposed with each other, by the inner surface of the case 1 so that the opposed interval is not changed, deformation of the connection arm 13 due to the stress of a bent elastic arm 14 is prevented, and whereby connection pressure of the cable 3 and the terminal plate 12 is maintained at a fixed level, and heating and firing accident due to the heating are thus prevented.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal block for connecting electric wires on the power supply side and electric wires on the load side without using screws.

0002

2. Description of the Related Art Conventionally, as shown in FIG. 4, a pair of terminal plates 12 is housed in a case 17 covered with a cover 16, and a wire sheath is inserted into both ends of the inner surfaces of the case 17 and the cover 16. There is a terminal block in which a groove 18 is formed. As shown in FIG. 5, a connecting piece 13 and an elastic piece 14 are formed at both ends of the terminal plate 12 to sandwich the core portion of the electric wire 3. As shown in FIG. In addition,
The cover 16 is fixed to the case 17 with screws 19.

0003

[Problem to be solved by the invention] Connection piece 13 and elastic piece 1
4, the elastic piece 14 is bent by the pressure of the electric wire 3, and the reaction force acts on the connecting piece 13. Since the direction in which this reaction force acts is the same as the direction in which the cover 16 is attached to the case 17, if the tightening force of the screw 32 is loose when attaching the cover 16 to the case 17, or
If the screws 32 become loose due to vibration or the like, the cover 16 may float off the case 17. As a result, the connection piece 13
is deformed by the pressure received from the elastic piece 14, and the contact pressure against the electric wire 3 is reduced. Therefore, the contact portion may generate heat and cause a fire accident.

0004

[Means for Solving the Problems] The present invention provides a bottomed box-shaped insulating case having a plurality of wire insertion holes at one end into which wires are inserted and an opening formed at the other end; A plurality of terminal plates housed in the case are provided with a connecting piece and an elastic piece that hold the core wire of the case at one end on the wire insertion hole side and one end on the opening side of the case; and an insulating lid fixed to the opening of the case and having a plurality of wire insertion holes for insertion.

[0005]

[Operation] The core wires of the plurality of wires inserted through each of the wire insertion holes formed at the end of the case are held between the connecting piece and the elastic piece formed at one end of the terminal plate, and The core wires of the plurality of wires inserted through each of the wire insertion holes are held between the connecting piece and the elastic piece formed at the other end of the terminal plate, but the connecting piece and the elastic piece of the terminal plate are spaced apart from each other. Because it is supported by the inner surface of the case, which does not change, the deformation of the connecting piece due to the reaction force of the bending elastic piece is prevented. Therefore, the contact pressure between the wire and the terminal plate is maintained constant, and heat generation and heat generation are prevented. It is possible to prevent fire accidents caused by heat generation.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 3. 1 is a bottomed box-shaped case made of an insulating material. That is, two wire insertion holes 4 for inserting wires 3 connected to a power source or load are formed in the bottom 2, which is one end of the case 1, and an opening 5 is formed in the other end, so that the inside of the case 1 can be inserted. Two terminal housing portions 7 are formed separated by a partition wall 6. A plate-shaped insulating lid 8 that closes the opening 5 is formed with a wire insertion hole 9 for inserting the wire 3 connected to a load or a power source, and protrusions 10 protruding from both sides. ing. Grooves 11 for slidably holding these protrusions 10 are formed on both sides of the opening 5 of the case 1.

[0007] Terminal board 12 accommodated in the terminal accommodating portion 7
A connecting piece 13 and an elastic piece 14, which clamp the core wire portion of the electric wire 3, are formed at both ends of the electric wire 3, respectively. These elastic pieces 14 are bent at acute angles. And terminal board 1
A plurality of windows 15 are formed in the case 1, facing the elastic piece 14 at one end of the case 1. Therefore, by inserting a tool such as a screwdriver through these windows 1 and pressing the elastic piece 14 to separate it from the contact piece 13, the electric wire 3 is connected to the terminal 1.
It is possible to remove it from 2. In this case, a flexible insulating sheet (not shown) is provided on the inner surface of the case 1 facing the opening surface of the window 15 so that the elastic piece 14 and the tool are not electrically conductive.

[0008] In such a configuration, the terminal plate 12 is housed in the terminal housing portion 7 from the opening 5 side. In addition, the lid body 8
When the protrusion 10 is inserted into the groove 11 of the case 1, the protrusion 10
The lid body 8 is fixed to the case 1 by friction between the groove 11 and the groove 11 . Of course, the lid 8 may be fixed to the case 1 with screws. In this state, the ends of the connecting piece 13 and the elastic piece 14 are opposed to the wire insertion holes 4 and 9.

When the electric wire 3 is inserted through the wire insertion holes 4 and 9, its core wire portion is held between the connecting piece 13 and the elastic piece 14. At this time, the elastic piece 14 is pushed by the electric wire 3 and bent, and the reaction force acts on the connection piece 13, but the outer surface of the connection piece 13 and the elastic piece 14 is a case in which the facing distance does not change. Since it is supported by the inner surface of 1, the connection piece 1
3 deformation is prevented. Therefore, the electric wire 3 and the terminal board 1
2 is maintained constant, heat generation of the terminal board 12 and fire accidents due to this heat generation are prevented.

0010

Effects of the Invention The present invention provides a bottomed box-shaped insulating case having a plurality of wire insertion holes at one end into which wires are inserted and an opening formed at the other end, and a core wire portion of the wire. A plurality of terminal plates, each of which is housed in the case, and a plurality of terminal plates in which a connecting piece to be held and an elastic piece are formed at one end of the case on the wire insertion hole side and one end of the case on the opening side; and a plurality of terminal plates into which the electric wires are inserted. and an insulating lid fixed to the opening of the case, so that a plurality of electric wires inserted through each of the wire insertion holes formed at the end of the case can be The core wire portion is held between a connecting piece and an elastic piece formed at one end of the terminal board, and the core wire portions of the plurality of wires inserted through each of the wire insertion holes formed in the lid body are formed at the other end of the terminal board. However, since the connecting piece of the terminal board and the elastic piece are supported by the inner surface of the case where the distance between them does not change, the connection is made by the reaction force of the bending elastic piece. It is possible to prevent deformation of the piece, and therefore it is possible to maintain a constant contact pressure between the electric wire and the terminal board, thereby having the effect of preventing heat generation and fire accidents caused by this heat generation.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a horizontal sectional view thereof.

FIG. 3 is a longitudinal sectional front view taken along line A-A in FIG. 2.

[
FIG. 4 is an exploded perspective view showing a conventional example.

FIG. 5 is a side view showing a connection state between a terminal board and an electric wire.

[Explanation of symbols]

1 Case 3 Electric wire 4 Wire insertion hole 5 Opening 8 Lid body 9 Wire insertion hole 12 Terminal board 13 Connection piece 14 Elastic piece

Claims (1)

[Claims] 1. A bottomed box-shaped insulating case having a plurality of wire insertion holes at one end into which wires are inserted and an opening formed at the other end, and a connecting piece that clamps the core wire of the wire. and an elastic piece are formed at one end of the case on the wire insertion hole side and one end on the opening side and housed in the case, and a plurality of wire insertion holes into which the electric wires are inserted. A terminal block comprising: an insulating lid fixed to the opening of the case.