JP2601193Y2 - Plug-in connection terminal - Google Patents

Description

[Detailed description of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug-in type connection terminal for connecting by inserting a core terminal without using a screw terminal or solder.

[0002]

2. Description of the Related Art FIG. 6 shows a prior art relating to a plug-in connection terminal of the present applicant. The connection terminal 40 intersects the insertion piece 43 having elasticity with the notch 42 of the substrate 41, inserts a tool 48 from a hole 46 of the housing 45, and pushes down the insertion piece 43. In this state, the core gap 44 in which the insertion piece 43 is cut out opens from the lower part of the substrate 41. Next, the insertion slot 47
When the tool 48 is removed from the insertion piece 43 after inserting the core wire 49 into the core wire gap 44 of the insertion piece 43 from above, the insertion piece 43 resiliently returns. This is a configuration in which core wires are connected.

[0003]

The connection terminal 40 is premised on using a tool 48 such as a driver when connecting the core wire 49.

When connecting, the tool 50 is connected to the housing 4.
After insertion into the hole 46 of No. 5, the inner insertion piece 43 was pushed down through the hole 46 to open the core wire gap 44. In particular, the operation of pushing down the insertion piece 43 has to be continued until the insertion of the cord is completed.

In addition, hole alignment between the insertion slot 47 and the core wire gap 44 is required, but this depends on how the insertion piece 43 is pushed down. Moreover, even if the holes are aligned, since the holes are separated from each other, careful insertion of the core wire is required.

Further, even if it becomes necessary to disconnect the core wire 49, the tool 48 must be used by pressing it down as described above, and the use of the tool cannot be avoided.

The present invention has been developed in view of the above circumstances, and an object of the present invention is to provide a connection terminal capable of connecting and disconnecting a core wire without using an auxiliary tool. Is what you do.

[0008]

The plug-in connection terminal according to the present invention for solving the above-mentioned problems has a connection terminal stamped from a single metal plate and an insulating case for accommodating the connection terminal. The connection terminal is bent from the upper piece of the substrate to have a spring property and is movable by pressing, and is bent in a box shape so as to surround the spring piece from the left and right pieces of the substrate. And a fixed piece which is provided with a slot on the side surface and is arranged to face the spring piece, and a core wire guide surface which is bent toward the fixed piece at a different inclination angle from the end of the spring and approaches obliquely, A holding piece which is located at an end of the core wire guide surface 4 and forms a holding gap 5 with the fixing piece; and an operating piece which extends from the free end side of the spring piece in the cross direction and protrudes from the slot. And the insulating case includes a conductive wire. A core wire insertion opening for inserting and inserting the core wire into the holding gap, and an opening for exposing the operation piece so as to be movably operable outward, and inserting the core wire into the core wire insertion hole. The spring piece can be deformed by being pushed in and inserted into the holding gap, and the core wire is pressed against the fixed piece with the holding piece by the restoring force of the spring piece, while the operating piece is pressed down from outside the insulating case with a finger. The holding gap is opened so that the core wire can be pulled out.

In a preferred embodiment, the conductor guide surface is inclined at an angle of about 40 to 50 degrees, preferably about 45 degrees, from the spring piece.

[0010]

The core wire is inserted into an opposing space formed by a spring piece and a fixed piece. From one end of the spring, the core wire is obliquely guided along the core wire guide surface to reach the clamping gap. When the wire is further inserted, the leading end of the core wire presses the inclined guide surface, so that the spring piece is bent by the reaction force of the inclined guide surface, so that the holding gap is opened, and the core wire enters the holding gap. When you stop pushing the core wire,
Since the spring piece narrows the holding gap by the elastic restoring force, the holding piece bites into the core wire between the holding piece and the fixed piece, thereby achieving electrical connection. Even if an external force is applied to the lead wire after connection and a force in the pull-out direction is applied, the holding piece bites into the core wire more strongly by the reaction force of the spring piece and is held firmly.

In order to release the core wire from the connection terminal, if the operation piece protruding from the opening of the insulating case is pushed down with a finger or the like, the holding gap is opened and the core wire can be pulled out.

[0012]

1 to 4 show an embodiment of a plug-in type connection terminal according to the present invention.

The plug-in connection terminal according to the present invention comprises an insulating case 20 as shown and a connection terminal 1 housed in the insulation case 20.
Is connected to, for example, a printed wiring board 21. In the figure,
Reference numeral 22 denotes a core wire insertion port, and reference numeral 23 denotes an opening for exposing the operation pieces 7 and 7.

The connection terminal 1 is press-formed from a metal plate. The connection piece 1 has a spring piece 2 which is elastic and can be moved by pressing, and a fixed piece 3 opposed to the spring piece 2.
A wire guide surface 4 bent at a different inclination angle from the one end of the spring toward the fixed piece 3 and approaching obliquely; and the fixed piece 3 located at an end of the wire guide surface 4. And a control piece 7 extending from the side surface of the spring piece 2 so as to be movably operable outward.

More specifically, the spring piece 2 is curved from the upper piece of the substrate 10 so as to have a spring property, a substantially linear flat plate portion 12 is extended from the curved portion 11, and the above-described core wire is extended from the flat plate portion 12. The guide surface 4 is bent and extended. The spring piece 2 is divided in the length direction by a slit 13,
The operation pieces 7, 7 described above extend from the side of the free end 12 in the cross direction. The flat plate portion 12 is set to have a length dimension that can provide sufficient spring elasticity, and an opposing space is formed between the flat plate portion 12 and the fixed piece 3.

The fixed piece 3 is bent in a box shape so as to surround and bend the spring piece 2 from the left and right pieces of the substrate 10 from the side, so that the spring pieces 2 are arranged to face each other. Slots 15, 15 are opened on both side surfaces 14, 14 of the fixing piece 3,
From the slots 15, 15, the operating pieces 7 of the spring pieces 2, 2
7 project to both sides. As described above, since the fixing piece 3 is bent in a box shape so as to bend the spring piece 2 from the side, the strength of the connection terminal can be increased, and the slot 15 is opened in the side surface 14 of the fixing piece 3. So spring piece 2
The operability can be improved by providing the operation piece 7 on the free end side of the device, and the whole can be reduced in size. In the drawings, reference numerals 16 and 17 denote concave notches for imparting flexibility.

Further, the core wire guide surface 4 of the holding piece 6 is
The spring piece 2 is inclined in a range of about 40 to 50 degrees from the flat plate portion 12 to the fixed side. In this case, it is preferable to have a tilt angle of about 45 degrees.

Next, the operation of the plug-in connection terminal 1 will be described. The spring piece 2 of the connection terminal 1 is given an elastic restoring force to the fixed side by the elasticity of the bending portion 11, and a force in the closing direction is applied to the sandwiching gap 5.

First, when a core wire 49 is inserted into the core wire insertion port 22 of the insulating case 20, the tip of the core wire 49 enters the space between the flat plate portion 12 of the spring piece 2 and the fixed piece 3, and It is guided to the clamping gap 5 along the inclination of the line guide surface 4. Cord 49
Is pushed, the tip of the core wire pushes the core wire guide surface 4 of the holding piece 6, and the spring force is pressed down by the reaction force against the restoring force of the curved portion 11, and the holding gap 5 is opened. As a result, the leading end of the core wire passes through the holding gap 5. When the pushing of the core wire 49 is stopped, the core wire 49 is held by the holding piece 6 by the restoring force of the bending portion 11.
Is pressed against the fixing piece 3 and the holding piece 6 is
The electrical connection is made.

When an external force is applied to the conductor 50 after the connection and a pull-out direction force is applied from the connection terminal 1, the holding piece 6 biting into the core wire 49 moves in a direction that helps the spring piece 2 to expand, so that it is bent. Since the restoring force of the spring piece 2 by the portion 11 is promoted, the sandwiching gap 5 is more strongly closed and the detachment of the conductor 50 is prevented.

Next, when the connection is disconnected, the operation piece 7 protruding outward through the opening 23 is pressed down with a finger or the like.
Since the holding piece 6 is lowered to open the holding gap 5 widely, the core wire 40 can be extracted.

In this embodiment, for a stranded wire having a diameter of 0.5 to 1.6 mm, the initial closing force of the clamping gap 5 is 0.25 to 1 kg, and the spring constant of the spring piece 2 in the clamping gap 5 is shown. Is set in the range of 0.5 to 1 kg / mm, and the inclination angle θ of the holding piece 6 is set in the range of 40 to 70 degrees. The contact resistance between the connected wire and the connection terminal is 2 to 4 milliohms.

FIG. 5 shows another embodiment, in which connection terminals 30 are for single-wire connection. The connection terminal 30 is configured such that a holding piece 35 having a core wire guide surface 33 is inclinedly extended from one spring piece 31, and operation pieces 36, 3 are provided from right and left before the holding piece 35.
6 has been extended. The spring piece 31 performs the same function as the pair of connection terminals with the fixed piece 32. Although the operation piece 36 and the slot 37 are provided opposite to each other,
It can be implemented on any one side.

The box-shaped shapes of the fixing pieces 3 and 32 illustrated and described in the above embodiment are examples, and are not intended to limit the present invention, and various shapes capable of forming a holding gap between the spring pieces 2 and 31 are not limited thereto. Can be designed.

[0025]

According to the plug-in connection terminal according to the present invention, it is possible to quickly and mechanically and electrically connect with one touch only by inserting a core wire without an auxiliary tool. At this time, since the core wire is simply pushed into the connection terminal, the connection operation can be easily performed even when the space surrounding the connection terminal is narrow. Further, even if an unexpected external force is applied to the conductor after the connection and a force in the pull-out direction is applied, a stronger holding force is generated in the holding gap, and detachment of the core wire is prevented. Further, when disconnecting the connection terminal, it is only necessary to put a finger on the operation piece and press it down without using an auxiliary tool, and the connection can be reliably performed with one touch. Furthermore, since the fixing piece is bent in a box shape so as to bend the spring piece from the side, the strength of the connection terminal can be increased, and a slot is opened in the side surface of the fixing piece, so that the spring piece can be freely moved. The operation piece can be provided on the end side, so that the spring piece can be easily operated, and the whole can be downsized while maintaining the strength of the connection terminal.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of a connection terminal used in a plug-in connection terminal according to the present invention.

FIG. 2 is a development view of a connection terminal used in the plug-in connection terminal according to the present invention.

FIG. 3 is a longitudinal sectional view illustrating a use state of the plug-in connection terminal according to the present invention.

FIG. 4 is a cross-sectional view illustrating a use state of the plug-in connection terminal according to the present invention.

FIG. 5 is a perspective view showing another embodiment of the connection terminal used in the plug-in connection terminal according to the present invention.

FIG. 6 is a cross-sectional view of a plug-in connection terminal for explaining the prior art;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 30 Connection terminal 2, 31 Spring piece 3, 32 Fixed piece 4, 33 Core wire guide surface 5, 34 Holding gap 6, 35 Holding piece 7, 36 Operation piece 10 Substrate 11 Curved portion 12 Flat plate portion 13 Slit 15, 37 Slots 16, 17 Concave Notch 20 Insulating Case 48 Tool 49 Core 50 Conductor

Claims (2)

(57) [Scope of request for utility model registration] 1. A connection terminal stamped from a single metal plate, and an insulating case for accommodating the connection terminal.
The connection terminal is bent from the upper piece of the substrate to have spring properties and is movable by pressing, and is bent into a box shape so as to surround the spring piece from the left and right pieces of the substrate. A fixing piece provided with a slot on a side surface and opposed to the spring piece; a core wire guide surface bent toward the fixed piece from the end of the spring at a different inclination angle to approach obliquely; A clamping piece that is located at an end of the guide surface and forms a clamping gap with the fixed piece, and an operating piece that extends in a cross direction from a free end side of the spring piece and protrudes from the slot, The insulating case includes a core wire insertion port for inserting a conductor and inserting the core wire into the holding gap, and an opening for exposing the operation piece so that the operation piece can be movably moved outward. The spring piece can be deformed by inserting it into the wire insertion port and pushing it in The core wire is pressed against the fixed piece by the holding piece by the restoring force of the spring piece while the holding piece is pressed down from the outside of the insulating case with a finger to open the holding gap to release the core wire. A plug-in connection terminal characterized in that it can be pulled out. 2. The wire guide surface is about 40 to 50 from a spring piece.
2. The plug-in connection terminal according to claim 1, wherein the inclination angle is about 45 degrees. [0001]