JPH0660964U - Plug-in type connection terminal - Google Patents

Abstract

(57) [Abstract] [Purpose] You can make an electrical connection simply by inserting the core wire without using an auxiliary tool such as a screwdriver, and you can exert a strong clamping force against pulling out and also assist when disconnecting. Provided is a connection terminal that can be used without using a tool. [Structure] A spring piece 2 having elasticity and movable by pressing, and a fixing piece 3 arranged to face the spring piece 2.
And a core wire guide surface 4 that is bent toward the fixed piece 3 from the end of the spring at different inclination angles and approaches diagonally, and the fixed piece 3 located at the end of the core wire guide surface 4. The holding piece 6 forms a holding gap 5 and the operation piece 7 is extended from the side surface of the spring piece 2 so as to be movable outward.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plug-in type connection terminal (hereinafter referred to as a connection terminal) for connecting by inserting a core wire terminal without using a screw terminal or solder.

[0002]

[Prior art]

 FIG. 6 shows a prior application technique relating to the connection terminal of the present applicant. In this connection terminal 40, a notch 42 of the base plate 41 is crossed with an elastic insertion piece 43, and a tool 48 is inserted from the hole 46 of the housing 45 to push down the insertion piece 43. In this state, the core wire gap 44 formed by notching the insertion piece 43 opens from the lower side of the substrate 41. Next, after inserting the core wire 49 from the insertion port 47 into the core wire gap 44 of the insertion piece 43 and then separating the tool 48 from the insertion piece 43, the insertion piece 43 elastically returns. The core wire is connected by narrowing the gap of 44.

[0003]

[Problems to be solved by the device]

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

At the time of connection, the tool 50 was inserted into the hole 46 of the housing 45, and then the insertion piece 43 inside 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 had to be continued until the core wire insertion was completed.

Further, although hole alignment between the insertion port 47 and the core wire gap 44 is required, it depends on how much the insertion piece 43 is pushed down. Moreover, even though the holes were aligned, the holes were separated, so careful insertion of the core wire was required.

Further, even when it is necessary to disconnect the core wire 49, the tool 48 must be pushed down and used as described above, and use of the tool is unavoidable.

Therefore, the present invention was developed in view of the above situation, and an object thereof is to provide a connection terminal that can be connected only by inserting a core wire without an auxiliary tool. .

[0008]

[Means for Solving the Problems]

 MEANS TO SOLVE THE PROBLEM The insertion connection terminal which concerns on this invention for solving the said subject has a spring piece which has elasticity and is movable by pressure, the fixed piece arrange | positioned facing this spring piece, and this fixed piece. A core wire guide surface that is bent at a different inclination angle from the end of the spring piece and approaches diagonally, and a sandwiching piece that is located at an end of the core wire guide surface and forms a sandwiching gap with the fixing piece, The operation piece is extended from the side surface of the spring piece so as to be movable outward.

In a preferred embodiment, the core wire guide surface has an inclination angle of about 40 to 50 degrees, preferably about 45 degrees from the spring piece. Further, it is possible to implement by a configuration in which a slot is provided on the side surface of the fixed piece and the operation piece is projected from this slot.

[0010]

[Action]

 The core wire is inserted into a facing space composed of a spring piece and a fixed piece, and is obliquely guided along the core wire guide surface from the end of the spring piece to reach the holding gap. When it is further inserted, the tip of the core wire presses the inclined guide surface, and the reaction force of the inclined guide surface causes the spring piece to bend and open the sandwiching gap, so that the core wire enters the sandwiching gap. When the pushing of the core wire is stopped, the spring piece narrows the sandwiching gap by the elastic restoring force, so that the sandwiching piece bites into the core wire and the electrical connection is achieved between the sandwiching piece and the fixed piece. Even if an external force is applied to the conductor wire after connection and a force is applied in the pull-out direction, the clamping piece further squeezes into the core wire due to the reaction force of the spring piece and is firmly held.

When disconnecting the core wire from the connection terminal, the operating space can be pulled out by pressing down the operation piece with a finger or the like to open the holding gap.

[0012]

【Example】

 1 to 4 show an embodiment of a connection terminal according to the present invention. The connecting terminal 1 has a spring piece 2 made of metal which is elastic and movable by pressing, a fixing piece 3 arranged to face the spring piece 2, and a different inclination toward the fixing piece 3 from one end of the bar. A core wire guide surface (4) bent at an angle and approaching obliquely; a holding piece (6) located at an end of the core wire guide surface (4) and forming a holding gap (5) with the fixing piece (3); It is composed of an operation piece 7 extending movably outward from two side surfaces.

More specifically, the spring piece 2 is curved from the upper piece of the substrate 10 so as to have elasticity, and a substantially straight flat plate portion 12 is extended from the curved portion 11, and the flat plate portion 12 has the above described core. The line guide surface 4 is bent and extended. The spring piece 2 is divided in the lengthwise direction by a slit 13, and the operation pieces 7, 7 described above are extended in the intersecting direction from the side of the free ends of the flat plate portions 12, 12. The flat plate portion 12 is set to have such a length dimension that sufficient spring elasticity can be imparted, and a facing space is formed between the flat plate portion 12 and the fixed piece 3.

Further, the fixing piece 3 is bent in a box shape so as to surround the spring piece 2 from the left and right pieces of the substrate 10 from the side, and the spring pieces 2 are arranged so as to face each other. Slots 15 and 15 are opened in both side surfaces 14 and 14 of the fixed piece 3, and operation pieces 7 and 7 of the blade pieces 2 and 2 are projected from both sides of the slots 15 and 15, respectively. In the figure, 16 and 17 are recessed portions that impart bendability.

Further, the core wire guide surface 4 of the holding piece 6 is inclined from the flat plate portion 12 of the spring piece 2 toward the fixed piece in the range of about 40 to 50 degrees. In this case, it is preferable to have an inclination angle of about 45 degrees. The connection terminal 1 is press-formed from a metal plate.

The above-described connection terminal 1 can be put into an insulating case 20 as shown in the drawing and implemented, and the substrate 10 is connected to, for example, a printed wiring board 21. In the figure, 22 is a core wire insertion port, and 23 is an opening for exposing the operation pieces 7, 7.

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

First, when the core wire 49 is inserted into the core wire insertion opening 22 of the insulating case 20, the tip of the core wire 49 penetrates into the space between the flat plate portion 12 of the spring piece 2 and the fixed piece 3, It is guided to the holding gap 5 along the inclination of the line guide surface 4. When the core wire 49 is pushed in, the tip of the core wire pushes the inclined guide surface 4 of the sandwiching piece 6, and the spring force 2 is pushed down by the reaction force against the restoring force of the bending portion 11 to open the sandwiching gap 5. To do. As a result, the tip of the core wire passes through the holding gap 16. When the pushing of the core wire 49 is stopped, the core wire 49 is pressed against the fixing piece 3 by the holding piece 6 by the restoring force of the bending portion 11, and the holding piece 6 bites into the core wire 49 to make an electrical connection. It

When an external force is applied to the conductor wire 50 after connection and a force in the pulling-out direction is applied from the connection terminal 1, the holding piece 6 embedded in the core wire 49 moves in a direction that assists the expansion of the spring piece 2. By supporting the restoring force of the spring piece 2 by the bent portion 11, the holding gap 5 is closed more strongly and the detachment of the conducting wire 50 is prevented.

Next, when disconnecting, if the operating piece 7 of the opening 23 is pushed down with a finger or the like, the holding piece 6 is lowered and the holding gap 5 is widely opened. Therefore, the core wire 40 should be removed. You can

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

FIG. 5 shows another embodiment, in which the connection terminal 30 is for single wire connection. In the connection terminal 30, a sandwiching piece 35 having a core wire guide surface 33 is inclined and extended from one spring piece 31, and operating pieces 36, 36 are extended from the front left and right sides of the sandwiching piece 35. The strip 31 serves the same function as the pair of connecting terminals with the strip 32. Although the operation piece 36 and the slot 37 are provided opposite to each other, the operation piece 36 and the slot 37 may be provided on either side.

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

[0024]

[Effect of device]

 According to the plug-in type connection terminal according to the present invention, it is possible to quickly and mechanically and electrically connect with one touch by inserting the core wire without an auxiliary tool. At this time, since the core wire is simply pushed into the connection terminal, the connection work can be easily performed even when the space surrounding the connection terminal is narrow. Further, after connection, even if an unexpected external force is applied to the conductor and a force in the pulling direction is applied, a stronger clamping force is generated in the clamping gap, and the core wire separation is prevented. Furthermore, when disconnecting, it is only necessary to push down the operation piece without using an auxiliary tool, and it can be done with one touch.

[Brief description of drawings]

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

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

FIG. 3 is a vertical cross-sectional view illustrating a usage state of the plug-in type connection terminal according to the present invention.

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

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

FIG. 6 is a cross-sectional view illustrating a prior application technique.

[Explanation of symbols]

 1,30 Plug-in type connection terminal 2,31 Spring piece 3,32 Fixed piece 4,33 Core wire guide surface 5,34 Clamping gap 6,35 Clamping piece 7,36 Operation piece 10 Board 11 Curved part 12 Flat plate part 13 Slit 15,37 Slots 16,17 Recessed portion 20 Insulation case 48 Tool 49 Core wire 50 Conductor wire

Claims (3)

[Scope of utility model registration request] 1. A spring piece which is elastic and movable by pressing, and a fixing piece which is arranged to face the spring piece.
A core wire guide surface that is bent at a different inclination angle from the end of the spring toward the fixed piece and obliquely approaches the fixed piece, and a nipping gap is formed at the end of the core wire guide surface and the fixed piece. A plug-in type connection terminal composed of a holding piece and an operation piece extending movably outward from a side surface of the spring piece. 2. The core wire guide surface is about 40 to 50 from the spring piece.
2. The plug-type connection terminal according to claim 1, wherein the inclination angle is about 45 degrees, preferably about 45 degrees. 3. The plug-type connecting terminal according to claim 1, wherein a slot is provided on a side surface of the fixed piece, and the operation piece is projected from the slot.