JPH08287972A - Connector terminal of lead wire - Google Patents

Abstract

PURPOSE: To connect the terminal of a lead wire to a pin-shaped connector terminal easily and surely by soldering. CONSTITUTION: At the top of the opening part 8d of a pin-shaped connector terminal 8 is provided a hole 8 in which the terminal 2a of a lead wire 2 is to be inserted. This lets the gas within the hole 8c during soldering be discharged, which improves the flow of solder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductor connecting terminal for connecting terminals of a conductor.

[0002]

2. Description of the Related Art Conventionally, when a terminal of a lead wire or the like is connected to a pin-shaped connection terminal, the terminal 2a of the wire 2 is brought into contact with the upper portion 1a of the pin-shaped connection terminal 1 as shown in FIG. Connection by spot (resistance) welding, connection by solder 3 as shown in FIG. 8, or terminal 2 as shown in FIG.
crimping the crimping part 4a of the crimping terminal 4 to a, and connecting part 4b
Is connected to the connection terminal 1 by spot welding or soldering. Incidentally, soldering may be performed after spot welding.

When connecting a circuit element 5 such as a thermistor between two connecting terminals, the lead portions 5a and 5a are connected to the upper portions of the connecting terminals 1 and 1 by spot welding as shown in FIG. , Or by soldering as shown in FIG. 11, or by fitting the upper portion 1a of the connection terminal 1 and the lead portion 5a to the circular tube crimping terminal 6 having conductivity as shown in FIG. 6 is crimped and connected.

[0004]

However, as shown in FIG.
When connecting by spot welding as shown in FIG. 10, the reliability of resistance welding is lacking because both the connection terminal 1 and the conducting wire 2 are conductive materials. When connecting by soldering as shown in FIGS. 8 and 11, it is difficult to fix the position and workability is poor. Further, when soldering is performed after spot welding, the number of steps is increased, which leads to an increase in cost.

When the conductor 2 is connected to the connection terminal 1 via the crimp terminal 4 as shown in FIG. 9, as a countermeasure against slight sliding that occurs between the end 2a of the conductor 2 and the crimp portion 4a of the crimp terminal 4. This requires soldering, which increases the number of parts and man-hours, resulting in cost increase. Further, when the circular tube crimp terminal 6 is used as shown in FIG. 12, the dimensional control of the circular tube crimp terminal 6 needs to be performed quite strictly, resulting in an increase in cost.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a connection terminal for a lead wire that can connect the end of the lead wire to the pin-shaped connection terminal very easily and reliably. To aim.

[0007]

To achieve the above object, according to the present invention, in claim 1, a hole for inserting a terminal of a conductive wire is formed in an upper end surface of a pin-shaped connection terminal, and the hole is formed. The structure is such that an opening is provided to open the outside. According to a fourth aspect of the present invention, the end of the lead wire and the pin-shaped connection terminal are integrally fitted to the outside by a slitted circular tube and soldered.

[0008]

According to the first aspect of the present invention, the end of the lead wire to be connected is inserted into the hole provided at the upper end of the pin-shaped connecting terminal, and the solder is poured into the terminal for connection. When the solder flows into the hole, the gas in the hole is discharged from the opening. As a result, the connection terminal and the terminal are satisfactorily soldered.

According to the fourth aspect, the end of the lead wire is inserted after the circular pipe with the slit is fitted on the upper portion of the pin-shaped connection terminal.
In this state, the terminal is held by the connection terminal. Then, the connection terminal, the terminal, and the slitted circular tube are connected by soldering. When soldering, the slit improves the flow of the solder, and the solder is soldered well.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a first embodiment of the present invention, in which a connecting terminal 8 has a pin shape, an upper portion 8a has a larger diameter than a shaft portion 8b, and an upper end surface is provided with a hole 8c in the axial direction. ing. The hole 8c is set so that the end 2a of the conducting wire 2 to be connected can be inserted with a predetermined gap with a slight gap.
A lateral hole 8d is formed at a position below the side surface of the upper portion 8a so that one end is opened outward and the other end is opened at the lower end of the hole 8c. The lateral hole 8d is a hole for venting gas when soldering, and is a small hole having a diameter of about 0.8 mm. The connection terminal 8 is formed of, for example, an iron-nickel (50:50) alloy.

The operation will be described below. As shown in FIG. 1, solder is attached to the end 2a of the lead wire 2 in advance, the solder is inserted into the hole 8c of the connection terminal 8, and the tip of the solder is applied to the bottom of the hole 8c. In this case, the tip of the terminal 2a does not necessarily have to be brought into contact with the bottom of the hole 8c, but may be inserted sufficiently.
In this state, the solder 3 is poured into the hole 8c for connection. As the solder 3 flows into the hole 8c, the gas (air) in the hole 8c is discharged to the outside from the lateral hole 8d at the lower end. As a result, solder sufficiently flows between the hole 8c and the terminal 2a, and these two are connected very well.

FIG. 2 shows a second embodiment of the present invention, in which the hole 8
c is replaced by a horizontal hole 8d that opens to the outside, and a hole 8
The slit 8e is provided from the lower end to the upper end of c. The width of the slit 8e is the width of the lateral hole 8
It is about 0.8 mm, as is the case with d. When the solder 3 flows into the hole 8c at the time of soldering, the gas in the hole 8c is easily discharged from the slit 8e.

FIG. 3 shows a third embodiment of the present invention in which the end face of the upper portion 8a of the connection terminal 8 is obliquely cut to make one side of the hole 8c shallow so that when the solder is poured, the hole 8c is formed.
The gas (air) inside is easily discharged. Such a shape has the advantage of being easy to manufacture. In FIG. 4, the upper portion 9a of the connection terminal 9 is formed into a square shape,
The hole for inserting the end 2a of the conductor 2 is a square hole 9c. The upper portion 9a is provided with a lateral hole 9d for communicating the lower end of the square hole 9c with the outside to vent gas. still,
Instead of the lateral hole 9d, a slit as shown in FIG. 2 may be provided. When the lead wire end 2a having a circular cross section is inserted into the square hole 9c, the spaces are formed into substantially triangular shapes at the four corners, so that the solder easily flows in and the soldering becomes easy. In addition, the amount of solder is increased and the strength of the connection portion is improved.

5 and 6 show a fifth embodiment of the present invention, in which two pin-shaped connecting terminals 10 and 10 are provided with lead portions 5a and 5a of a circuit element 5 such as a thermistor and a circular pipe 11 with slits. Shown is the case of connection by soldering with. The slitted circular tube 11 has a slit 1 over the entire length on the side wall of the circular tube.
1a is provided and has a substantially C shape in an end view, and its inner diameter is
The size is set so that the connection terminal 10 and the lead portion 5a can be brought into contact with each other to be slightly press-fitted. The slitted circular tube 11 is made of, for example, copper or a copper alloy.

When connecting the lead portion 5a to the connection terminal 10, first, a slitted circular tube 11 is provided above the connection terminal 10.
And then the lead portion 5a. At this time, in the slitted circular tube 11, the slit 11a is slightly opened to expand the diameter, and the lead portion 5a can be easily inserted. The lead portion 5a is pressed against and held by the connection terminal 10. Next, the connection terminal 10, the lead portion 5a, and the slitted circular tube 11 are connected by the solder 3. At this time, the flow of the solder is improved by the slit 11a of the slitted circular tube 11, so that the solder is favorably soldered and the soldered state is confirmed.

[0016]

As described above, according to the present invention, in claim 1, the end of the lead wire to be connected is inserted into the hole provided at the upper end of the pin-shaped connecting terminal, and the solder is poured into the terminal for connection. At this time, the gas in the hole is discharged from the opening to the outside,
The flow of solder is improved, the connection terminal and the terminal are soldered very well, and the reliability is improved.

According to a fourth aspect of the present invention, a circular cylindrical tube having slits is externally fitted on the upper portion of the pin-shaped connecting terminal and the end of the lead wire and soldered to these, thereby connecting a circuit element such as a thermistor having a lead portion. Workability can be improved when performing. Further, the flow of solder is improved by the slit during soldering, so that good soldering can be performed and the state of soldering can be confirmed.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a first embodiment of a connection terminal for a conductor wire according to the present invention.

FIG. 2 is a perspective view showing a second embodiment of the connection terminal of the present invention.

FIG. 3 is a perspective view showing a third embodiment of the connection terminal of the present invention.

FIG. 4 is a perspective view showing a fourth embodiment of the connection terminal of the present invention.

FIG. 5 shows a fifth embodiment of the connection terminal of the present invention, and is a cross-sectional view of an essential part in which the connection terminal and the lead portion of the circuit element are connected.

6 is a sectional view taken along the line VI-VI in FIG.

FIG. 7 is an explanatory diagram for connecting a terminal of a conductor to a conventional pin-shaped connection terminal by spot welding.

FIG. 8 is an explanatory diagram for connecting a terminal of a conductive wire to a conventional pin-shaped connection terminal by soldering.

FIG. 9 is an explanatory diagram of a case where a terminal of a conductive wire is connected to a conventional pin-shaped connection terminal by a crimp terminal and soldering.

FIG. 10 is an explanatory diagram for connecting a lead portion of a circuit element to a conventional pin-shaped connection terminal by spot welding.

FIG. 11 is an explanatory diagram for connecting a lead portion of a circuit element to a conventional pin-shaped connection terminal by soldering.

FIG. 12 is an explanatory diagram of a case where a lead portion of a circuit element is connected to a conventional pin-shaped connection terminal by a circular tube crimp terminal.

[Explanation of symbols]

 2 Conductor 2a Terminal 3 Solder 5 Circuit element (thermistor) 5a Lead part 8, 9, 10 Pin-shaped connection terminal 8c, 9c Hole 8d, 9d Horizontal hole 8e Slit 11 Circular tube with slit 11a Slit

Claims (4)

[Claims] 1. A connection terminal for a lead wire, comprising: a pin-shaped connection terminal having an upper end surface provided with a hole into which an end of the lead wire is inserted, and an opening for opening the hole to the outside. 2. The conductor connecting terminal according to claim 1, wherein the opening is a lateral hole provided in a lower portion of the hole. 3. The opening is a slit provided along the longitudinal direction from the lower portion to the upper end of the hole.
Connection terminal for the conductor described in. 4. A connecting terminal for a conductive wire, characterized in that a terminal of the conductive wire and a pin-shaped connecting terminal are externally fitted together with a slitted circular tube and soldered.