JPH0682761U - Electrical connection structure - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is
An object of the present invention is to provide an electrical connection structure having excellent connection strength without damaging the conductor during crimping. The electrical connection structure of the present invention comprises a first crimping portion provided at one end for crimping a conductor of a lead wire, a second crimping portion provided at the other end for crimping an insulating coating of a composite lead wire, and a first crimping portion.
An electrical connection fitting composed of a V-shaped bent plate-like material provided with a crimping portion and a central crimping portion for crimping an ultrafine conductor or a spiral conductor provided between the crimping portion and the second crimping portion is provided at substantially equal intervals. It was crimped and supported linearly from three directions.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electrical connection structure, and in particular, an electrical connection metal having a V-shaped plate is crimped from the outer periphery at substantially equal intervals to improve the connection strength without damaging the ultrafine conductor. Regarding connection structure.

[0002]

[Prior art]

 As the conductor connecting portion of the lead wire, there are one using an electric connecting fitting, one connecting by soldering, and the like. In either case, the conductors to be connected have the same or similar sizes.

However, a heater wire used for a special purpose, for example, for heating a water pipe has a so-called extra-fine conductor in the shape of a very thin ribbon, and a conductor having a normal size. In the case of connecting, the conventional electrical connection fittings cannot be used to obtain a predetermined mechanical strength, so that the shape of the electrical connection fittings needs to be devised.

Conventional electrical connection fittings used for this type of application have an insulator crimping portion for crimping and gripping an insulator of a lead wire having an ultrafine conductor, and a conductor crimping portion for crimping an ultrafine conductor, Insulators and ultrafine conductors are crimped here in a cross-section similar to a heart shape (F crimp method).

[0005]

[Problems to be solved by the device]

 However, according to the conventional electrical connection structure, due to the conductor shape of the ultrafine conductor, the mechanical strength of the conductor itself is inferior to that of a general lead wire conductor. For example, the electrical strength can be improved by a known method such as F crimp. When the electrical connection is made, the crimping force locally acts on a specific point of the ultrafine conductor, which may cause disconnection or damage to these conductors, resulting in inconvenience such as poor connection at the crimping portion. On the other hand, if crimp connection is performed according to the strength of the conductor so as not to cause this inconvenience, sufficient crimping cannot be obtained and the connection strength will be insufficient, and the crimp connection part will easily come off from the external force. Have. Therefore, an object of the present invention is to provide an electrical connection structure having excellent connection strength without damaging the conductor during crimping, regardless of the shape of the conductor.

[0006]

[Means for Solving the Problems]

 The present invention provides a first crimping portion provided at one end for crimping the conductor of the lead wire, in order to provide excellent connection strength without damaging the ultrafine conductor during crimping regardless of the shape of the conductor, The second crimping portion provided at the other end for crimping the insulation coating of the ultra-fine conductor lead wire or the composite lead wire, and the extra-fine conductor or spiral conductor provided between the first crimping portion and the second crimping portion (EN) Provided is an electric connection structure for crimping and supporting linearly an electric connecting fitting made of a V-shaped plate-like member having a central crimping portion in three directions at substantially equal intervals.

[0007]

[Action]

 According to the electrical connection structure of the present invention, the electrical connection fitting is compressed from the three directions toward the center of the conductor at the central crimping portion, so that the gap in the compression cross section is reduced and the conductor is held without deviation. To have.

The electrical connection structure of the present invention will be described in detail below with reference to examples. In the examples, a heater wire having a heat-resistant Teflon fiber material as a core and a conductor around which a heat-generating conductor having a rectangular cross section is spirally wound back is taken up.

The heater wire is an electric wire formed by covering an exothermic conductor that generates heat when a current is conducted with an insulating material. For example, the heater wire is wound around a pipe or a valve to conduct a current, and based on this current. It is used for keeping heat and preventing freezing by generating heat.

[First Embodiment] FIG. 1 shows an embodiment of the electrical connection structure of the present invention, in which a first crimp portion 3 for crimping a conductor 2 of a lead wire 1 and an insulating coating 5 of a heater wire 4 are crimped. The second pressure-bonding portion 6 and the heat-generating conductor 8 extended from the second pressure-bonding portion 6 and spirally wound around the outer periphery of the core 7 formed by bundling a plurality of fiber materials such as Teflon. The electrical connection fitting 10 is provided with a central crimping portion 9.

The electrical connection fitting 10 is formed by bending a plate-shaped material, the dimensions of the crimping portions 3 and 6 of which are determined according to the electric wire to be connected, into a V-shape. The first and second crimp portions 3 and 6 and the central crimp portion 9 are formed such that the central axes thereof are substantially aligned.

FIG. 2 is a side view showing a state in which the lead wire and the heater wire are connected by crimping using the electric connection fitting in FIG.

The heater wire 4 has a ribbon-shaped heat-generating conductor 8 wound spirally around a core 7 in a state where the ribbon-shaped heat-generating conductor 8 is extended from the insulating coating 5 which is pressure-bonded at the second pressure-bonding portion 6 to the central pressure-bonding portion. 9, and the outer circumference of the central crimping portion 9 is compressed to make crimp connection.

The lead wire 1 is provided with a bell mouth (not shown) at the crimping end on the covering side by a conventional method such as F crimping so that the conductor 2 does not have a problem such as cutting at the first crimping portion 3. Are provided and crimped and connected.

FIG. 3 shows a cross section taken along the line AA in FIG. 2. The central crimping portion 9 compressed from three directions shown in the drawing compresses the core 7 and the heat-generating conductor 8 toward the center thereof. To do.

By this compression, the gap 11 in the cross section of the central crimping portion 9 is reduced, and the core 7 and the heat-generating conductor 8 are linearly pressed by the inner wall of the central crimping portion 9 to be held.

The electrical connection by the above electrical connection structure has the following advantages. (1) The insulation coating of the lead wire is crimped and fixed at the second crimping portion, and the conductor wound around the core is extended from this second crimping portion to reach the central crimping portion for crimping connection. The conductor exposed from the cover is structurally protected and will not be broken even if it is affected by external force during installation work or transportation. (2) The gap in the central crimping area is reduced by crimping, and the conductor wound around the core is held linearly toward the center, so partial shearing that occurs in conventional crimping methods such as F crimping is performed. No force is applied to the conductor and it has good crimpability. (3) The crimping part is made of V-shaped plate material (commonly known as open barrel), so the conductor positioning during crimping can be easily confirmed from the outside and no crimping defects occur. .

In this heater wire, the mechanical connection by F crimp only had a tensile strength of 1 kg or less, whereas in the present invention, the conductor strength is comparable to the general connection strength between lead wires. It was confirmed that the steel itself exhibits a maximum tensile strength of approximately 3 kg.

Further, in the present embodiment, the heater wire in which the ribbon-shaped heat-generating conductor is spirally wound around the core has been described. However, an extremely fine single core wire is provided around the core of the fiber bundle. The same effect can be obtained by applying it to the crimp connection of the spirally wound lead wire.

Further, since the conductor is crimped from the three sides, an extremely thin single-core wire other than the composite lead wire formed by winding the ribbon-shaped conductor around the core of the fiber bundle is used as the conductor in the insulating coating. It is possible to provide excellent connectivity even when applied to the electrical connection of the lead wire included in.

[0021]

[Effect of device]

 As described above, according to the electrical connection structure of the present invention, the first crimping portion provided at one end for crimping the conductor of the lead wire and the second crimping portion provided at the other end for crimping the ultrafine conductor or the insulating coating of the composite lead wire Electrical connection composed of a V-shaped bent plate-shaped material having a crimping portion and a central crimping portion for crimping an ultrafine conductor or a spiral conductor provided between the first crimping portion and the second crimping portion Since the metal fittings are crimped and supported linearly in three directions at approximately equal intervals, excellent connection strength can be imparted without damaging the conductor during crimping, regardless of the conductor shape. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an electrical connection structure of the present invention.

FIG. 2 is a side view showing an electrical connection structure of the present invention.

FIG. 3 is a sectional view showing an electrical connection structure of the present invention.

[Explanation of symbols]

 1 Lead Wire 2 Conductor 3 First Crimping Section 4 Heater Wire 5 Insulation 6 Second Crimping Section 7 Core 8 Heat-Producing Conductor 9 Central Crimping Section 10 Electrical Connection Metal Fitting 11 Gap

Claims (1)

[Scope of utility model registration request] 1. A mechanical and electrical device using a plate-shaped electrical connecting fitting formed by bending a lead wire having a non-ultra-fine conductor and a lead wire having an ultra-fine conductor into a V shape. In the electrical connection structure for crimping connection to, the first electrical connection fitting is provided at one end for crimping the conductor of the lead wire, and the other end is provided for crimping the insulation coating of the lead wire of the ultrafine conductor. A second crimping portion and a central crimping portion that crimps an ultrafine conductor that is provided between the first crimping portion and the second crimping portion and that extends from the second crimping portion. An electrical connection structure characterized in that the outer circumference of an ultrafine conductor is crimped and supported linearly in three directions at substantially equal intervals.