JP5202158B2 - Different diameter electric wire connector and connection method - Google Patents

Description

  The present invention relates to a connection tool and a connection method for bundling and electrically connecting different-diameter electric wires of a large-diameter covered wire and a finer-diameter wire.

  As shown in FIG. 1, a sheet-like heater used for an automobile seat heater, an electric blanket, an electric heating mat, or the like can obtain a heating effect by the heat generated by the heater wire H meandering through the sheet S. The end of the heater wire H is connected to the end of the lead wire L, and power is supplied via the lead wire.

  Conventionally, the lead wire and the heater wire are connected by a connector 1 as shown in FIG. 2, for example. This connector 1 is a cylindrical metal fitting that is split into a slit at one location. The lead wire L core wire L0 and the heater wire H are bundled in a direction in which the tips are aligned, and are passed through the cylinder by caulking. Both wires are temporarily fixed and soldered by immersing the portion in molten solder. The core portion L0 of the lead wire L and the heater wire H are held in an electrically connected state by the solder portion 2 formed thereby.

  Moreover, there exists a thing of the literature 1 as a connection structure of a pin and a lead wire. This is a structure in which the tip of the lead wire is wound around and soldered to the tip of the pin requiring electrical connection in the same direction.

JP 2000-340272 A

  In the connector 1 described above, the lead wire and the heater wire are connected by pressing. However, the lead wire has a core portion diameter of about 1 to 10 mm, the heater wire is a wire with exposed conductors, and the diameter is about 20 to 30% of the lead wire core portion diameter (about 0.05 to 2. 5 mm), the diameters of both are greatly different. As a result, the thin heater wire is likely to swing from the solder portion after soldering, and the wire may break at the boundary with the solder portion due to swinging.

  On the other hand, since the connection structure of Document 1 is intended for a pin having high rigidity, a lead wire can be wound around the pin. However, when the core wire of the covered wire is easily bent, it is difficult to wind a thin wire. is there. Moreover, even if it is a case where winding is possible, it is necessary to wind up reliably so that it may not remove | deviate by the soldering process, and will require an effort for the operation | work.

  These problems are caused by bundling and connecting different-diameter electric wires having a large diameter and a small diameter.

  Then, an object of this invention is to provide the connection tool and connection method of a different diameter electric wire which can perform the connection of a different diameter electric wire simply and reliably.

  In order to achieve the above-mentioned object, the present invention is a connecting tool for bundling and connecting different-diameter electric wires of a large-diameter covered wire and a finer-diameter thin wire in a direction in which the tips are aligned. And a pair of front barrel pieces extending to both sides on the distal end side of the base, and a pair of rear barrel pieces extending to both sides on the proximal side of the base, The front barrel piece and the rear barrel piece are provided at a distance from each other, and the front barrel piece is bent so as to circulate around the core wire exposed at the tip end portion of the covered wire and the thin wire along the core wire. The rear barrel piece wraps around the covered portion of the covered wire and the small-diameter wire along the length. When the wire is bent, the thin wire is placed on the base side. And provides a different radial electric wire connector, characterized in that it has a length capable of 緊Ku embrace linear in the circumferential direction.

  In order to achieve the above object, the present invention is also a connection method for bundling and connecting large-diameter and small-diameter different-diameter electric wires in a direction in which the tips are aligned, and is positioned along the bundled electric wires. A pair of front barrel pieces extending to both sides on the distal end side of the base portion, and a pair of rear barrel pieces extending to both side portions on the proximal end side of the base portion, the front barrel piece and the rear barrel Using a connecting tool that is spaced apart from each other, the front barrel piece is used to form a bent solder intrusion gap in the circumferential direction from both sides in a state where the coated wire and the tip of the thin wire are bundled together. Cover and leave the front barrel piece tightly by bending it from both sides in the circumferential direction in a state where the covered wire and the thin wire are bundled at a position spaced from the tip by the rear barrel piece. Solder by dipping in molten solder together with the above coated wire and thin wire There is provided a method of connecting the different radial electric line, characterized by.

  In the connector according to the present invention, the front barrel piece and the rear barrel piece are provided at a distance from the base, so that different diameter electric wires can be bundled and connected accurately by each barrel piece. it can. That is, the front barrel piece has such a length that it can cover these wires in the circumferential direction leaving an intrusion gap for molten solder when bent so as to go around the core wire and the thin wire of the covered wire. Therefore, both electric wires can be covered in the circumferential direction leaving a gap for molten solder to enter. In addition, the rear barrel piece is tightened in the circumferential direction in a state where the thin wire is arranged on the base side when it is bent so as to go around the covered portion of the covered wire and the thin wire along the covered portion. Since it has a length that can be held, it is possible to hold both electric wires tightly in the circumferential direction. In this state, if the front barrel piece is immersed in the molten solder together with the large-diameter wire and the thin-diameter wire, the solder enters the intrusion gap and solidifies to obtain a solid soldered state. Therefore, according to this connection tool, it is possible to easily and reliably connect different-diameter electric wires.

  In particular, if the front barrel piece is provided with a window portion for allowing the solder to pass therethrough, the penetration of the molten solder into the penetration gap can be reliably obtained.

  In addition, if the base is provided with a recess for loosely accepting the thin wire at a position where the rear barrel piece extends to both sides, the thin wire is While it is securely connected to the thick wire by soldering at the part barrel piece, it is not tightly restrained by the holding by the rear barrel piece. Therefore, local deformation and stress concentration at the constraint position are avoided, and damage such as cutting is prevented.

  In the connection method according to the present invention, the front barrel piece covers the tip of the large-diameter wire and the thin-diameter wire in a state in which they are bundled to leave the solder penetration gap extending in the circumferential direction from both sides, and the rear barrel piece, In the state where the large diameter wire and the small diameter wire are bundled at a position spaced from the tip portion, they are tightly held in the circumferential direction from both sides, and in this state, the front barrel piece together with the large diameter wire and the small diameter wire Since it is immersed in the molten solder, the solder enters the intrusion gap and solidifies to obtain a strong soldered state. Therefore, according to this connection method, it is possible to easily and reliably connect different-diameter wires.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 3 is a perspective view of a connector for different diameter wires according to an embodiment of the present invention, and FIG. 4 is a side view showing a state where two wires having different diameters are connected using the connector. The figure illustrates the connection between the lead wire L and the heater wire H of the sheet heater described above. The lead wire L is a covered wire in which a plurality of core wires L0 are covered with an insulating resin coating, and the heater wire H is a thin stranded wire of a heating resistor, and is usually covered with a thin insulating film.

  The different-diameter electric wire connector 10 shown in FIG. 1 is used to connect a lead wire L, which is a large-diameter coated wire, and a different-diameter wire of a thinner heater wire H in a direction in which the tips are aligned. A base 20 positioned along the front, a front barrel piece 30 consisting of a pair of wing pieces 30a and 30b extending to both sides on the distal end side of the base, and a pair extending to both sides on the proximal side of the base 20 And a rear barrel piece 40 composed of the wing pieces 40a and 40b. The front barrel piece 30 and the rear barrel piece 40 are provided at a distance from each other, and can be bent independently to surround the electric wire. When the front barrel piece 30 is bent so as to circulate around the core wire L0 exposed at the tip end portion of the covered wire and the heater wire H along the core wire L0, an intrusion gap for molten solder is left between these wires. The rear barrel piece 40 has a length that can be covered in the circumferential direction, and when the rear barrel piece 40 is bent so as to go around the covered portion of the covered wire and the thin wire along the same, the thin wire is arranged on the base side. It has a length that allows the covered wire to be tightly held in the circumferential direction.

  Each blade piece 30a, 30b of the front barrel piece 30 is provided with a window portion 32 through which solder is passed when immersed in molten solder. The window portion 32 has a size that does not impair the shape retention when the front barrel piece 30 is bent so as to pass molten solder and surround the electric wire.

  The base portion 20 includes a recess 21 extending in the front-rear direction from the rear end to a position corresponding to the coupling portion of the rear barrel piece 40. The recess 21 has a cross-sectional dimension that can accept the heater wire H loosely.

  A reinforcing portion 50 is provided between the front barrel piece 30 and the rear barrel piece 40 to connect them. As shown in FIGS. 3 and 4, the reinforcing portion 50 is preferably provided in the vicinity of the base portion 20. In this way, it is not prevented that the front barrel piece 30 and the rear barrel piece 40 are bent independently.

  Further, the following configuration is adopted so as to obtain the effects described later. The front end edge 31 of the front barrel piece 30 and the rear end edge 41 of the rear barrel piece 40 are gently expanded in diameter. In each of the front barrel piece 30 and the rear barrel piece 40, one wing piece 30b, 40b is narrower and longer than the other wing piece 30a, 40a. The reinforcing portion 50 is provided with a marking 51 that serves as a guide for the depth when immersed in molten solder.

This connector 10 shown in FIG. 7 has a lead wire with a core wire diameter of 1.2 mm (element wire: diameter 0.23 mm × 19) and a diameter of 0.44 mm (element wire: diameter 0.05 mm × 40). The fitting that best fits the heater wire, the dimensions and materials of the main part are as follows:
Base 20
Width W20 (full length in the front-rear direction): 10 mm
Upper end depth D30 of front barrel piece 30: 3 mm
Upper end depth D40 of rear barrel piece 40: 5 mm
Front barrel piece 30:
Wings 30a width W30a, height H30a: 5mm, 2mm
Wings 30b width W30b, height H30b: 4mm, 3mm
Rear barrel piece 40:
Wings 40a width W40a, height H40a: 3mm, 4mm
Wings 40b width W40b, height H40b: 2mm, 5mm
Window part 32
Window width W32: 0.5mm
Window height H32: 1mm
Reinforcement 50
Reinforcement height H50: 1mm
Distance C50 from base 20 to reinforcing part: 0.5 mm
Marking 51
Distance from front end of front barrel piece 30 to marking 51: 5 mm
Overall material and thickness of connector 10: phosphor bronze, 0.3 mm
In addition, the said dimension and material are the illustrations in the case of embodiment of illustration, and this invention is not limited to this.

  If this connector 10 is used, the lead wire L and the heater wire H can be connected as follows. With respect to the connector 10 in the state of FIG. 3, the heater wire H is placed in the recess 21 of the base 20, and the lead wire L is placed thereon. Lead wire L removes coating L1 at the tip portion in advance to expose core wire L0. When the insulating film of the heater wire H is thin, the insulating film is melted and removed during the subsequent immersion in the molten solder. If the insulating film of the heater wire H is so thick that it cannot be removed, the insulating film at the tip is removed in advance. The heater wire H and the lead wire L protrude slightly from the front end edge of the front barrel piece 30, the rear side of the heater wire H enters the recess 21, and the covering portion of the lead wire L is the rear barrel piece 40. Position it so that it is in position.

  In this state, the wing pieces 40a and 40b of the rear barrel piece 40 are bent inward using a manual caulking tool or a dedicated press machine, and the lead wire L is tightly held as shown in FIG. In many cases, the base 20 is in contact with the lead wire L at the upper end of the recess 21 and is pressed against the lead wire L so that the tip of the wing piece 40b overlaps the tip of the wing piece 40a. Become. Then, the rear barrel piece 40 is tightened tightly so that the lead wire L does not come off.

  In this embodiment, as the above-mentioned dimension shows, as for the rear barrel piece, the wing piece 40b is narrower than the wing piece 40a. Thereby, as shown in FIG. 8, when the wing piece 40b is overlapped and wound on the wing piece 40a, the edge of the wide wing piece 40b protrudes from the narrow wing piece 40a in the width direction, Due to the pressing force P of the blade piece 40a, the protruding edge is deformed so as to be lifted. As a result, the surface of the lead wire L is prevented from being damaged by the edge of the blade piece 40b. The wing piece 40b is longer than the wing piece 40a. Thereby, the winding length of the blade piece 40b whose winding diameter is larger than that of the blade piece 40a is sufficiently secured. However, if these effects are not particularly necessary, either or both of the width and length of the blade pieces 40a and 40b can be made the same.

  Next, the wing pieces 30a and 30b of the front barrel piece 30 are bent inward with a manual caulking tool or a dedicated press machine, and these wires are moved in the circumferential direction leaving a gap for molten solder as shown in FIG. Cover. In many cases, the base 20 is in contact with the lower portion of the lead wire L and the heater wire H, the tips of the blade pieces 30a and 30b are in contact with each other, and each is in contact with the core wire L0. However, depending on the shape and dimensions of the base 20, the front barrel piece 30 and the lead wire L, the tips of the wing pieces 30a and 30b may be separated from each other or overlap each other, or other parts of the base 20 and the front barrel piece 30 may be It may be in a form of contacting the core wire L0. In any case, the front barrel piece 30 covers the heater wire H and the lead wire L in the circumferential direction leaving a gap for molten solder to enter. The intrusion gap of the molten solder is such a size that the molten solder can easily enter when immersed in the molten solder bath, and the molten solder is held in the gap when pulled up from the bath, and is about 0.1 to 0.3 mm. It is desirable to do.

  In this embodiment, as shown by the above-mentioned dimensions, the front barrel piece 30 has a blade piece 30b that is narrower and longer than 30a. Thus, as in the case of the rear barrel piece 40, as shown in FIG. 8, the protruding edge of the wide blade piece 30b is deformed so as to be lifted by the pressing force P of the blade piece 30a. The heater wire H is prevented from being damaged by the edge portion. Further, since the wing piece 30b is longer than the wing piece 30a, a sufficient winding length of the wing piece 30b having a larger winding diameter than the wing piece 30a is ensured. However, if these effects are not particularly necessary, either or both of the width and the length of the wing pieces 30a and 30b can be made the same.

  Moreover, since the connection tool 10 is manufactured with phosphor bronze as described above, the soldering property is good and the spring property is high. Due to this spring property, when the front barrel piece 30 and the rear barrel piece 40 are bent along the circumference of the electric wire, the tip of the overlapped wing piece is in close contact with and fixed, while the other portion is used to fix the electric wire. The wires are not tightened more than necessary, and the wires are prevented from being damaged.

  In the case where the high spring property is not required, it is possible to manufacture the connector using a material such as brass.

  Next, the tip side of the connector 10 is immersed in a molten solder bath together with the electric wires. As a result, the molten solder penetrates into the gap between the front barrel piece 30 and the electric wire, and the heater wire H and the core wire L0 are fixed to the front barrel piece 30 by solidification, and the heater wire H and the core wire L0 are fixed. Is connected to the conductive state.

  The immersion depth is set to a depth that secures connection and connection between the connector 10 and the electric wire. Generally, the entire front barrel piece 30 is immersed until it is below the liquid level. In this embodiment, since the marking 51 is provided, the optimum immersion depth is obtained by immersing the marking until the marking reaches the liquid level, and secure fixation and connection are possible. The marking can be provided by an appropriate means such as a concavo-convex part, a notch part, a display part using ink or the like.

In this embodiment, since the window part 32 for letting molten solder pass is provided, molten solder penetrate | invades also from here and more reliable fixation and connection are obtained rapidly. If the electric wire is immersed in the molten solder bath for a long time, the metal components of the electric wire such as copper will elute into the solder and the diameter will be reduced, especially in the case of a thin wire such as a heater wire. Is big. Therefore, it is important to allow solder to rapidly enter between the connection tool and the electric wire.

  After the molten solder penetrates into the gap by dipping, if the connecting tool 10 is pulled up together with the electric wire, the solder is solidified with a decrease in temperature, and fixing and connection of the connecting tool and the electric wire can be obtained.

  In this embodiment, since the base 20 is provided with a recess 21 that extends from the rear end in the front-rear direction and can receive the heater wire H loosely, the connector 10 and the heater wire are used in a later process or when the seat heater is used. Even if vibration or force is applied to H, stress concentration at the holding location by the thin heater wire H can be avoided, and the risk of disconnection at the holding location can be reduced.

  Further, since the front end edge 31 of the front barrel piece 30 and the rear end edge 41 of the rear barrel piece 40 are gently expanded in diameter, the lead wire L or the heater wire H is swung with respect to the connector 10. In addition, the lead wire L or the heater wire H can be prevented from being damaged by the edge of the connection tool.

  Furthermore, since the reinforcement part 50 which connects these is provided between the front barrel piece 30 and the rear barrel piece 40, even if force acts on the connection tool 10, it is hard to produce an unnecessary deformation | transformation. Since the reinforcement part 50 is provided in the vicinity of the base part 20, it is not prevented that the front barrel piece 30 and the rear barrel piece 40 are bent independently. Further, since the gap of the aforementioned distance c50 is formed between the reinforcing portion 50 and the base portion 20, the front barrel piece 30 with respect to the base portion 20 when the plate is punched and then bent into the state shown in FIG. And the rear barrel piece 40 can be bent easily.

The present invention is not limited to the above embodiment, and various modifications can be made. For example, the shapes and dimensions of the base 20, the front barrel piece 30, the rear barrel piece 40, the window portion 32, and the like may be other things. In addition, the window portion is not necessarily provided. Front barrel piece 30 and the rear barrel pieces 40 may be formed by putting off Re eye on a part of a continuous sheet and, in which case both of the gap size becomes zero or a value close thereto, both The barrel pieces can be bent independently.

  The above description has been made by taking as an example a connector for connecting a lead wire and a heater wire of a sheet-like heater, but the present invention is not limited to this, and the difference between a large diameter and a small diameter is possible. The present invention can be applied to various cases in which radial electric wires are bundled and connected.

It is a perspective view which shows an example of the internal structure of a sheet-like heater. It is a perspective view which shows the conventional connection structure of a different diameter electric wire, (a) is in the middle of a connection, (b) shows the state of the completion of a connection. It is a perspective view which shows the connector for different diameter electric wires which concerns on one Embodiment of this invention. It is a side view which shows the connecting tool shown in FIG. 3 with an electric wire. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is a figure which shows the location which displays the dimension of the connection tool shown in FIG. It is explanatory drawing of the deformation | transformation state of the connection tool shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Different diameter electric wire connector 20 Base 21 Recess 30 Front barrel piece 31 Front end edge 32 of front barrel piece Window part 40 Rear barrel piece 41 Rear end edge 50 of rear barrel piece Reinforcement part 51 Marking H Heater wire L Lead Wire L0 Core wire L1 Coating C Molten solder penetration gap

Claims (7)

A base for positioning and connecting along a bundled wire, a connecting tool for bundling and connecting different-diameter wires of a large-diameter coated wire and a finer-thinning wire in a direction in which the tips are aligned, and the base A pair of front barrel pieces extending to both sides on the distal end side, and a pair of rear barrel pieces extending to both sides on the proximal side of the base part,
The front barrel piece and the rear barrel piece are provided at a distance from each other, and the front barrel piece is bent so as to go around the core wire exposed at the tip end portion of the covered wire and the thin wire along the core wire. The rear barrel piece wraps around the covered portion of the covered wire and the thin wire along the length. has a length capable of緊Ku embrace the coated wire in the circumferential direction in a state in which the thin wire disposed proximally when bent,
A different diameter electric wire connector, wherein the base portion or the reinforcing portion is provided with a marking that is a measure of the depth when immersed in molten solder.   The said front barrel piece is provided with the window part for letting a solder pass, The connector for different diameter electric wires of Claim 1 characterized by the above-mentioned.   3. The base according to claim 1, wherein the base portion includes a recess that extends in the front-rear direction from a rear end to a position corresponding to a coupling portion of the rear barrel piece and can accept a small diameter wire loosely. Connection tool for different diameter wires.   The different diameter electric wire according to any one of claims 1 to 3, wherein a reinforcing portion for connecting the front barrel piece and the rear barrel piece is provided at a distance from the base portion. Connection tool.   5. The different-diameter electric wire connector according to claim 1, wherein at least one of the front end edge of the front barrel piece and the rear end edge of the rear barrel piece is gently expanded in diameter. .   6. The different diameter electric wire connector according to claim 1, wherein one of the pair of rear barrel pieces is narrower and longer than the other. It is a connection method for bundling and connecting large-diameter and small-diameter different-diameter wires in the direction in which the tips are aligned,
A base portion positioned along the bundled wires, a pair of front barrel pieces extending to both side portions at the distal end side of the base portion, and a pair of rear barrel pieces extending to both side portions at the proximal end side of the base portion; The front barrel piece and the rear barrel piece are provided at a distance from each other, and the base or reinforcing part is provided with a marking that is a measure of the depth when immersed in molten solder. Use
The front barrel piece covers the covered wire and the small diameter wire in a state where the coated wire and the thin diameter wire are bundled in the circumferential direction, leaving a gap for solder penetration, and the rear barrel piece covers the coated wire and the small diameter wire. Bending in the circumferential direction from both sides and holding tightly in a state of being bundled at a position spaced from the tip,
A method for connecting different-diameter electric wires, wherein the front barrel piece is immersed in molten solder together with the coated wire and the thin wire and soldered until the marking reaches the liquid surface of the molten solder.