JP2002231361A - Contact piece assembly for electrical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reliable electrical connector capable of contacting at many portions. SOLUTION: In this contact piece assembly 3 wherein a pin part 361 of a junction terminal 36 is fitted into a hollow hole of a socket part 312 of a contact piece 31, a coil spring 314 for contact having a non-circular cross section is inserted into the hollow hole of the socket part 312, so that the socket part 312 is brought into contact with the pin part 361 at many portions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric coupler for use in one-touch connection and disconnection of an electric circuit in electric vehicles such as railway vehicles, industrial machines such as overhead cranes, and general electric equipment. Contact strip assembly (assembly).

[0002]

2. Description of the Related Art In electric vehicles such as railway vehicles, industrial machines such as overhead cranes, etc., one-touch type electric couplers are used in portions where electric circuits need to be efficiently connected and disconnected. As a representative, JIS E 4202
An example of the jumper coupler shown in FIG.

In a train where a plurality of vehicles are connected, various electric wires for power, control, signal, etc. are passed between the vehicles.
These are connected at the same time as connecting and disconnecting the vehicle itself,
Since it must be separated, it cannot be fixed wiring. Therefore, the vehicle wiring in the vehicle is connected by a jumper cable between the vehicles via an electrical coupler. At one end of the jumper cable as an electric coupler, a plug (electric plug) combining multiple electric circuits is attached,
On the other hand, a stopper for receiving the stopper is provided at an end of the vehicle.

FIG. 3 is a partial side view partially showing a plug and a plug receiving portion in a state in which a plug on the jumper side is connected to a plug receiver on the vehicle side, wherein 1 is a plug receiver, and 11 is a main body thereof. The plug receiving body 12 is a lid that is placed over the front surface of the plug receiving body 11 when the plug is not connected, that is, on the opening on the connection side. The vehicle body wiring 5 is connected to the plug receiver 11, and a gasket 14 is arranged at the outlet portion. The gasket 14 is fastened to the cover of the plug receiver 11 and the vehicle body wiring 5 by the fastening gland 13 to form a waterproof and sealed structure.

[0005] Reference numeral 2 denotes a plug attached to one end of the jumper cable 6, and reference numeral 21 denotes a plug as its main body. In this case, similarly to the stopper receiver 1, the outlet of the stopper 21 and the jumper cable 6 has a waterproof sealing structure with a tightening gland 23 and a gasket 24. 61 is a jumper side electric wire. An insulating table 15 is provided inside the plug receiver 11, and a plurality of movable contact piece assemblies 3 are implanted at predetermined intervals over the entire surface of the insulating table 15. Similarly, an insulating table 25 is provided inside the plug 21, and a plurality of fixed contact piece assemblies 4 are implanted at predetermined intervals over the entire surface thereof. When the plug receiver 11 and the plug 21 are connected, the contact piece assemblies 3 and 4 of the corresponding circuits of the plug receiver 1 and the plug 2 come into contact with each other to form an electric circuit between adjacent vehicles.

In general, there are two types of contact piece assemblies 3 and 4, a butt type in which pins on both sides contact each other and press each other, and an insertion type in which one is a socket and the other is a pin to fit. An example of a conventional butting type contact piece assembly will be described with reference to FIG. FIG. 4 is a partial cross-sectional view of the main part of the plug receiving member showing a state in which the contact piece assembly 3 is implanted through the insulating base 15. Reference numeral 310 denotes a rod-shaped contact portion at the tip, and reference numeral 311 denotes a large end formed at the rear end of the contact portion 310 (in this specification, the side to which the plug 2 is viewed from the plug receiver 1 is referred to as front, and the vehicle body side is referred to as rear). A cross-sectional portion, 312 is a rod-shaped socket portion having a hollow hole formed at the back thereof, 32 is a compression spring, 35 is an outer cylinder, 36 is a relay terminal, 360 is its main body, 361
Is a pin provided in front of the main body 360 of the relay terminal 36,
362 is a terminal formed at the rear end of the main body 360 of the relay terminal 361.

FIG. 5 is an exploded front view of components of the contact piece assembly 3 shown in FIG. (A) is a cylindrical outer cylinder
Reference numerals 35 and 351 denote a locking portion formed in front of the contact portion, 37 denotes a clip at the tip portion, and (b) denotes a contact piece 31. Similarly, the contact portion 310 connects the contact piece assembly 3 to the mating contact piece assembly 4. It is a rod-shaped part that contacts. A recess 312 having a slightly larger inner diameter is formed inside the socket portion 311. (C) is a relay conductor 36
It is.

Further, the main body 360 of the relay terminal 36 shown in FIG.
Is a cross section substantially the same as the large cross section 310 of the contact piece 31.
The outer cylinder 35 shown in (a) has such a size that the inner surface thereof matches the large cross-section 311 of the contact piece 31 and the main body 360 of the relay terminal 36, and the front end is small enough that the rod-shaped contact portion 310 of the contact piece 31 protrudes. A locking portion 351 is formed as a diameter. The rod-like portion of the contact piece 31 protrudes forward from this locking portion 351.
Since the large cross section 311 at the rear end of the 31 is restrained by the locking portion 351, the contact piece 31 does not protrude forward. On the other hand, the outer cylinder 35 is fixed to the main body 360 of the relay terminal 36 at the rear end by welding, bonding, or the like. The outer tube 35 may be made of metal or resin, but when made of metal, it is preferable to coat the surface with a resin tube for improving insulation.

As shown in FIG. 4, a contact piece is provided inside the outer cylinder 35.
The pin portion 361 of the relay terminal 36 is inserted into the socket portion 312 of the base 31, and the compression spring inserted between the contact piece 31 and the relay terminal 36 is inserted.
The contact piece 31 protrudes forward in a state where the contact piece 31 is locked by the locking portion 351 of the outer cylinder 35 by this. In this state, the contact piece 31 is inserted from the rear into the hole of the insulating base 15, and the clip 37 at the tip is fixed to the insulating base 15. When you pass through the hole, the blade opens and is fixed.

When the plug is connected to the stopper and pushed by the contact piece assembly (reference numeral 4 in FIG. 3) on the mating side, the contact piece 31 is pushed in as shown by the arrow in FIG. The contact piece assembly 4 on the stopper side is securely contacted. By the way, the current path between the contact piece 31 and the relay terminal 36 inside the contact piece assembly 3 passes through the compression spring 32 and via the contact portion of the socket portion 312 to the pin portion 361. However, since the compression spring 32 is usually made of stainless steel or hard steel wire in consideration of mechanical properties, the conductivity is not very good. On the other hand, the socket part 311 to the pin part 361
Is not so tight considering the slidability, so the contact is uncertain. Therefore, conventionally, the socket part
311 More reliable contact has been achieved by forming an elastic overhang on the inner surface.

One example is a contact leaf spring 315 shown in FIG. This spring is a thin plate of beryllium copper (for example,
125 mm), slits in the longitudinal direction are provided at equal intervals, and these are wound into a cylindrical shape and formed into a constricted conical shape at the center, and this is a portion in which the diameter of the socket portion 312 is slightly increased, that is, FIG. It is inserted into the recess 313 shown in FIG. Since the remaining band-like portion between the slits protrudes toward the inner diameter side, when the pin portion 361 is inserted therein, the electric current surely flows through the contact leaf spring 315.

On the other hand, a conventional example of a plug-in type contact piece assembly will be described with reference to FIGS. 7A is a side view showing the female socket contact piece assembly 38, FIG. 7B is a perspective view showing a contact leaf spring 382 fitted in the socket part 381, and 383 is a rear terminal part. is there. FIG. 8 is a side view showing the male-side pin contact piece assembly 39 corresponding thereto, in which 391 is a pin portion, and 392 is a terminal portion. Clip shown in both figures
Reference numeral 37 is for inserting and fixing in the hole of the insulating base as in FIG.

The socket portion 381 of the socket contact piece 38
Is a metal cylindrical body, which has an elliptical slit in the axial direction, and a contact leaf spring 382 made of a thin plate as shown in FIG. 7B is fitted on the outside of the cylindrical body. . The contact leaf spring 382 is formed with a linear projection facing inward in the axial direction at a position corresponding to the slit. The projection is inserted into the socket portion in a cylindrical shape, and the projection is inserted. Although reliable energization is achieved by contacting the pins, the inner diameter of the socket 381 is, for example, about 1.64 mm, and the spring effect of the tubular leaf spring is not so large.

By the way, while the outer dimensions of the electrical coupler cannot be so large, the number of vehicle body wirings to be connected has been steadily increasing in recent years. There is a tendency that a large number of contact piece assemblies are implanted with individual dimensions reduced. The small size of the contact piece assembly is about 2.0 mm in outer diameter of the contact piece and only about 1.0 mm in the hole diameter of the socket portion. Even if a contact leaf spring is inserted into this hole, there are actually few places where the contact is surely made, and sufficient conductivity cannot be obtained.

[0015]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and to realize a reliable electrical coupler having sufficient conductivity by contacting at many places even in a small size. With the goal.

[0016]

SUMMARY OF THE INVENTION The present invention relates to a contact piece assembly to be implanted in an insulating stand of an electric coupler, comprising: an outer cylinder having a locking portion having a reduced inner diameter at a front end; At the rear end, a large cross section corresponding to the inner surface of the outer cylinder is formed, and further a bar-shaped socket portion having a hollow hole is provided at the rear thereof,
The contact portion is protruded forward from the locking portion and is accommodated in the outer cylinder so as to be movable in the longitudinal direction, and the hollow portion of the socket portion in front of the main body portion corresponding to the inner surface of the outer cylinder. A pin portion to be fitted is provided, a terminal portion is provided at the rear, and the main body portion is fixed to a rear end of the outer cylinder between the relay terminal and a large cross-sectional portion of the contact piece and the main body portion of the relay terminal. A contact piece for an electrical coupler, comprising: a compression spring inserted into the contact piece; a contact coil spring having a non-circular cross section being inserted into a hollow hole of a socket portion of the contact piece. An assembly or a socket contact piece assembly implanted in an insulating stand of an electrical coupler, wherein a contact coil spring having a non-circular cross section is inserted into a hollow hole of a socket portion of the socket contact piece assembly. Connection for an electrical coupler A piece assembly, preferably the material of the contact coil spring is said electrical connection dexterity contactor assembly is a beryllium copper or phosphor bronze.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a contact coil spring having a non-circular cross section is inserted into a gap between a socket portion and a pin portion which slides in response to the entry and exit of a contact piece, and a large number of contact points allow a contact coil spring to be formed therebetween. Thus, the conventional problem can be solved. The contact coil spring uses a wire made of conductive spring material such as beryllium copper and phosphor bronze from the viewpoint of mechanical properties and conductivity, winds it around a core metal with a non-circular cross section, shapes it into a coil, and heat-treats it. Can be manufactured.

[0018]

1 is a front view and FIG. 2 is a side view of a contact coil spring according to an embodiment of the present invention. The contact coil spring 314 is similar to a normal coil spring when viewed from the front, but is characterized in that it is wound in a coil shape having a non-circular cross section as shown in FIG. FIG. 2 (a) is a triangle,
(B) is an example of a square, and (c) is an example of a hexagonal cross section. In order to manufacture such a coil spring, a heat treatment may be performed after winding a material wire around such a core metal having a non-circular cross section.

The contact piece assembly of the present invention has a concave portion 313 of the socket portion 312 of the contact piece 31 of FIG. 5 described above with reference to the contact coil spring 314 having a non-circular cross section as shown in FIGS. The socket portion 381 of the socket contact piece assembly 38 of FIG.
The other structure is exactly the same as the conventional one shown in FIG. 4, FIG. 5, or FIG. 7, FIG. However, a slit is not required for the socket portion 382 shown in FIG.
It is desirable to provide a recess with a slightly larger inner diameter at the position where 4 is inserted. A screw groove may be provided at a position where the contact coil spring 314 is inserted, and the contact coil spring 314 may be screwed along the groove.

The inside of the contact coil spring 314 is shown in FIG.
When the pin portion 361 as shown in FIG. 8C or the pin portion 391 in FIG. 8 is inserted, it corresponds to a string connecting the contact point between the contact coil spring 314 and the concave portion 313 of the outer socket portion 311 or 381. The spring material to be pressed is spread outward, and the pin 361
Strong contact with. If the cross section of the spring is triangular, at least three such contact points occur per turn, and the total number of turns is multiple of the number of turns of the spring. Can be planned.

[0021]

According to the present invention, there is an excellent effect that a reliable electrical coupler having sufficient conductivity by being in contact with a large number of places even in a small size is realized.

[Brief description of the drawings]

FIG. 1 is a side view of a contact coil spring according to an embodiment of the present invention.

FIG. 2 is a front view of the contact coil spring according to the embodiment of the present invention.

FIG. 3 is a partial side view partially showing a plug and a plug receiving portion in a state where a jumper-side plug is connected to a vehicle-side plug receiver according to the present invention.

FIG. 4 is a partial cross-sectional view of a main part of a stopper receiving part showing an example of a conventional technique.

FIG. 5 is a side view showing, in partial cross section, parts constituting the movable contact piece assembly shown in FIG. 4;

FIG. 6 is a side view of a contact leaf spring according to the related art.

FIG. 7 is a side view of a socket contact piece showing an example of a conventional technique.

FIG. 8 is a side view of a pin contact piece showing an example of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plug receiver 2 Plug 3 (Movable) contact piece assembly 4 (Fixed) contact piece assembly 5 Body wiring 6 Jumper cable 11 Plug receiver 12 Lid 13, 23 Tightening gland 14, 24 Gasket 15, 16, 25 Insulation Stand 21 Plug 31 Contact piece 32 Compression spring 35 Outer cylinder 36 Relay terminal 37 Clip 38 Socket contact piece assembly 39 Pin contact piece assembly 51 Body side wire 61 Jumper side wire 310 Contact part 311 Large cross section 312, 381 Socket part 313 recess 314 contact coil spring 315, 382 contact leaf spring 351 locking part 360 body part 361, 391 pin part 362, 383, 392 terminal part

Claims (3)

[Claims] 1. A contact piece assembly (3) implanted in an insulating stand of an electric coupler, comprising: an outer cylinder (35) having a locking portion (351) having a reduced inner diameter at a front end; Department (310
) At the rear end, a large cross-section (3
11), and a bar-shaped socket portion (312) having a hollow hole is provided at the rear thereof, and the contact portion (310) is protruded forward from the locking portion (351) to form the outer cylinder (35).
A contact piece (31) housed therein so as to be movable in a longitudinal direction, and a pin part fitted into a hollow hole of the socket part (312) in front of a main body part (361) corresponding to the inner surface of the outer cylinder (35). (36
1), a terminal portion (362) is provided on the rear side, and the main body portion (361) is connected to a relay terminal (36) fixed to the rear end of the outer cylinder (35) and the contact piece (31). In a contact piece assembly (3) for an electric coupler, comprising a compression spring (32) inserted between a cross section (311) and a main body (361) of the relay terminal (36), the contact piece ( 31) Socket part (312
) Contact coil spring with non-circular cross section in hollow hole (314)
A contact piece assembly for an electric coupler, wherein a contact piece is inserted. 2. A socket contact piece assembly (38) implanted in an insulating stand of an electrical coupler, wherein said socket contact piece assembly (38) has a non-circular cross-section in a hollow hole of a socket portion (381). A contact piece assembly for an electric coupler, wherein a contact coil spring (314) is inserted. 3. The contact piece assembly for an electrical coupler according to claim 1, wherein said contact coil spring is made of beryllium copper or phosphor bronze.