JP2605985Y2 - Electrical connection structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection structure, and more particularly to a V-shaped electric connection metal plate which is crimped at substantially equal intervals from an outer periphery thereof without damaging an ultrafine conductor. The present invention relates to an electric connection structure with improved connection strength.

[0002]

2. Description of the Related Art As a conductor connecting portion of a lead wire, there are a connecting portion using an electric connection fitting and a connecting portion connected by soldering. In any case, the sizes of the conductors to be connected have the same or similar sizes.

[0003] However, heater wires used for special applications, for example, for heating water pipes or the like, have a so-called extra-fine conductor in the form of a very thin ribbon or the like. In the case of connection, the use of a conventional electrical connection fitting cannot provide a predetermined mechanical strength, so that the shape of the electrical connection fitting needs to be devised.

A conventional electrical connection fitting used for this kind of application has an insulator crimping portion for crimping and holding an insulator of a lead wire having a fine conductor, and a conductor crimping portion for crimping a fine conductor. Here, the insulator and the ultrafine conductor are crimped into a cross section similar to a heart shape (F crimp method).

[0005]

However, according to the conventional electrical connection structure, the mechanical strength of the conductor itself is inferior to that of a general lead wire due to the conductor shape of the ultrafine conductor. When an electrical connection is made by a known method such as F crimping, a crimping force acts locally on a specific point of the ultrafine conductor. May occur. On the other hand, if crimping connection is performed according to the strength of the conductor so that this inconvenience does not occur, sufficient crimping cannot be obtained and the connection strength will be insufficient, and the crimped connection portion will easily come off against external force. Have. Accordingly, 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]

The present invention achieves the above object.
First lead having a non-micron sized conductor to form
Spirally wound around the wire and the core made of insulator
A second lead having a ribbon-shaped conductor of a superfine size
Use electrical connection fittings made of plate-shaped material with V-shaped bent wire
Electrical connection structure to connect mechanically and electrically
The electric connection fitting is provided at one end and the first refill is provided.
A first crimping part for crimping the non-fine conductor of the lead wire
And the insulation coating of the second lead wire provided at the other end.
A second crimping portion to be attached, the first crimping portion, and the second crimping portion
Between the second crimping portion and the extra-fine
Composed of a central crimping part that crimps a ribbon-shaped conductor of size
The center crimping part has an outer periphery with an interval of approximately 120 °.
Approximately 120 ° outward by being compressed in one position
The three concave portions having a substantially arc shape are provided at intervals of
Three substantially arc-shaped convex portions are respectively formed corresponding to the portions.
Between the core and the three projections.
Provided is an electrical connection structure having a configuration for crimping a bon-shaped conductor .

[0007]

According to the electrical connection structure of the present invention, the electrical connection fitting is compressed in three directions toward the center of the conductor at the central crimping portion, thereby reducing the gap in the compressed cross section and causing the conductor to be offset. Hold without.

An embodiment will be described below to describe the electrical connection structure of the present invention in detail. In the embodiment, a heater wire having a heat-resistant Teflon fiber material as a core, and a conductor formed by winding a heat-generating conductor having a rectangular cross section in a spiral shape around the core is used.

[0009] The heater wire is an electric wire formed by covering a heat generating conductor which generates heat when a current is conducted with an insulating material.
For example, current is conducted by winding it around a pipe or a valve, and heat is generated based on the current, so that it is used for applications such as heat retention and freeze prevention.

FIG. 1 shows an embodiment of an electric connection structure according to the present invention, in which a first crimping portion 3 for crimping a conductor 2 of a lead wire 1 and a heater wire 4.
A second crimping portion 6 for crimping the insulating coating 5 of
An electrical connection fitting 10 which is extended and has a central crimping portion 9 for crimping a heat-generating conductor 8 spirally wound around an outer periphery of a core 7 formed by bundling a plurality of fibrous materials such as Teflon. Be composed.

[0011] The electrical connection fitting 10 is a V-shaped plate member whose dimensions of the crimping portions 3 and 6 are determined according to the electric wire to be connected.
It is formed by bending into a letter shape. The first and second crimping portions 3 and 6 and the central crimping portion 9 are formed such that their central axes are substantially aligned.

FIG. 2 is a side view showing a state in which a lead wire and a 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 heat-generating conductor 8 is extended from the insulating coating 5 crimped in the second crimping portion 6. 9, the outer periphery of the central crimping portion 9 is compressed and connected by being compressed.

The lead wire 1 has a bell mouth (not shown) attached to the crimped end on the coating side by a conventional method such as F crimping so as to prevent the conductor 2 from being broken or the like in the first crimping portion 3. Are connected by crimping.

FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2, and the central crimping portion 9 compressed from three directions shown in FIG.
Compresses the core 7 and the heat generating conductor 8 toward the center thereof.

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 held by the inner wall of the central crimping portion 9 being pressed linearly on the outer periphery.

The electrical connection by the above electrical connection structure has the following advantages. (1) The insulation coating of the lead wire is fixed by crimping at the second crimping part, and the conductor wound around the core is extended from the second crimping part to the central crimping part to perform crimping connection. The more exposed conductors are structurally protected, so that they will not break even if they are affected by external forces during installation and transport. (2) Since the gap of the central crimping part is reduced by crimping and the conductor wound on the core is held linearly toward the center,
A partial shearing force generated in a conventional crimping method such as an F crimp is not applied to the conductor, so that the conductor has good crimpability. (3) Since the crimping portion is made of a plate-like material bent in a V-shape (commonly referred to as an open barrel), the positioning of the conductor at the time of crimping can be easily confirmed from the outside, and the crimping failure does not occur.

In this heater wire, the mechanical connection by the F crimp only had a tensile strength of 1 kg or less, but in the present invention, the conductor itself which is comparable to the connection strength between general lead wires is used. Has a maximum tensile strength of about 3 kg.

In this embodiment, a heater wire in which a heat-generating conductor formed in a ribbon shape is spirally wound around a core has been described. However, a single core wire having an extremely fine diameter is spirally wound around the core of the fiber bundle. The same effect can be obtained even when applied to crimping connection of lead wires wound in a shape.

Further, since the crimping is performed to hold the conductor from three sides, an ultrafine single core wire other than the composite lead wire formed by winding a ribbon-shaped conductor around the core of the fiber bundle is used as the conductor in the insulating coating. The present invention can provide excellent connectivity even when applied to the electrical connection of the lead wire included in the present invention.

[0021]

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 insulating coating of the fine conductor or the composite lead wire provided at the other end. A second crimping portion for crimping the first crimping portion and the second crimping portion.
An electrical connection fitting composed of a plate-shaped material bent into a V-shape with a central crimping part for crimping a fine conductor or a spiral conductor provided between the crimping parts. Since the support is crimped, the connection strength can be excellent without damaging the conductor during crimping, regardless of the shape of the conductor.

[Brief description of the drawings]

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lead wire 2 Conductor 3 1st crimping part 4 Heater wire 5 Insulation coating 6 2nd crimping part 7 core 8 Heat generating conductor 9 Central crimping part 10 Electrical connection fitting 11 Gap

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 4/18

Claims (1)

(57) [Scope of request for utility model registration] And 1. A first Lee <br/> lead wires having a conductor of non-ultrafine size, in a spiral shape with respect to a core made of an insulating material
A second re <br/> lead wires having a ribbon-like conductor wound ultrafine size using electrical fitting plate member which is bent in a V-shape mechanically and electrically contacts In the following electrical connection structure, the electrical connection fitting is provided at one end, and a first crimping portion that crimps the non-fine-sized conductor of the first lead wire;
A second crimping portion provided at the other end for crimping the insulation coating of the second lead wire, and the extra fine member provided between the first crimping portion and the second crimping portion and extended from the second crimping portion. Rhinoceros
A central crimping portion for crimping a ribbon-shaped conductor, the central crimping portion having three outer circumferential portions at intervals of approximately 120 °.
Approximately 120 ° outside by compression
The three concave portions having a substantially arc shape correspond to the three concave portions inside.
In response, three substantially arc-shaped projections are formed, respectively,
The extra-fine ribbon shape between the core and the three protrusions
An electrical connection structure comprising a structure for crimping the conductor .