JP2654087B2 - Insert plug - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an insertion plug used by being inserted into an outlet.

[Prior Art] As this type of plug, there is one described in Japanese Patent Application Laid-Open No. 61-128481. That is, FIG. 9 and FIG.
10, a blade block provided with a pair of blades 12
10 and a terminal fitting 2 for connecting the electric wire 1 to the blade 12 and holding the blade block 10 so as to be rotatable around a rotation axis 14 along the direction in which the blades 12 are arranged. A support blade 20 is provided, and the blade 12 is rotatably connected to the terminal fitting 2. The support 20 is formed by combining a pair of halves 20a 'and 20b' to accommodate the terminal fitting 2, and the holes 4 formed in both halves 20a 'and 20b' are formed.
The two halves 20a 'and 20b' are connected by inserting the pin 42 and caulking the pin 42.

[Problem to be Solved by the Invention] In the above-mentioned conventional configuration, since the two halves 20a 'and 20b' are connected by the pin 42, the assembling work of the support body 20 involves a caulking work. However, there is a problem that workability is poor. Further, the terminal portion 21 of the terminal fitting 2 has a substantially U-shaped cross section, and its open sides are opened in opposite directions. The terminal portion 21 has a pair of caulking pieces 21a for caulking the core wire 1a of the electric wire 1 and a pair of caulking pieces 21b for caulking the jacket 1b. However, when the core wire 1a of the electric wire 1 is caulked with the caulking pieces 21a and 21b of the terminal fitting 2, the right side and the left side are simultaneously caulked because the open side of the terminal fitting 2 is opened in the opposite direction. There is a problem that you can not. Further, since the core 1a of the electric wire 1 must be formed in a crimped state in the terminal fitting 2 before assembling, there is a problem that the assembling workability is poor.

The present invention has been provided in view of the above points,
Facilitates the assembly work of the support and facilitates the overall assembly work, and also firmly joins the halves together, and enables the electric wires and terminal fittings to be simultaneously caulked,
An object of the present invention is to provide a plug for the purpose of improving assembly workability.

Means for Solving the Problems The invention according to claim 1, wherein a plug blade block provided with a pair of protruding blades and a pair of terminal fittings electrically connected to one end of the blade are provided and plugged. A support for holding the blade block so as to be rotatable around a rotation axis along the direction in which the blades are arranged,
An outer shell formed simultaneously so as to cover the outer periphery of the support, wherein the support has a projection provided on one of the pair of half bodies and a recess provided on the other half. At the other end of the pair of terminal fittings, terminal portions having a U-shaped cross section for caulking connection with the core wire of the electric wire are respectively formed, and the open surfaces of both terminal portions are opposed to the facing surfaces of the two halves. And in the same direction.

According to a second aspect of the present invention, in the first aspect of the present invention, a separation preventing portion is formed near the blade block in the support so as to straddle the two halves and fill a part of the outer shell. It is a thing.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the terminal portions of both terminal fittings are bent at a predetermined angle corresponding to the direction of the end crack of the electric wire.

[Operation] According to the first aspect of the present invention, since the support body is formed by connecting the pair of half bodies with the projections and the concaves and convexes, the step of caulking the pins becomes unnecessary, and the assembling work is performed. This facilitates the assembly work of the plug. In addition, since the open surface of the U-shaped terminal portion provided on the terminal fitting is parallel to and in the same direction as the opposing surfaces of the two halves, the core wire of the electric wire is fed from the same direction to the terminal portion of the terminal fitting. The two electric wires can be caulked at the same time, which also improves the productivity. Furthermore, since the outer shell is simultaneously formed so as to cover the outer periphery of the support made of the pair of halves, the pair of unevenly coupled halves is prevented from opening when the blade block rotates. Can be joined by an outer shell.

The invention according to claim 2 is that, by filling a part of the outer shell into the peel preventing portion formed so as to straddle the two halves, the outer shell reinforces the bonding force between the two halves, The bonding strength of the outer shell to the support is also increased to prevent peeling of the outer shell.

According to the third aspect of the present invention, the terminal portions of the two terminal fittings are bent at a predetermined angle corresponding to the direction of the end crack of the electric wire, thereby eliminating the need for forming after crossing the end of the electric wire. It was done.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. As shown in FIG. 1 and FIG.
A blade block 10 holding a base 12 and a blade block
A support 20 for rotatably holding the support 10 and an outer shell 30 covering the periphery of the support 20 are provided.
Are provided with a pair of terminal fittings 2 electrically connected to each other.

The movable body 11 of the blade block 10 is formed of an insulating material such as a synthetic resin in a shape such that the front side is flat and the rear side is arcuate. 13 are formed. A cutout groove 13a is formed in a part of the periphery of the recess 13 on the front side of the movable body 11. The blade 12 has notches 12a on both side edges, and the notch 12a
The two sides of the notch groove 13a of 11 engage with each other, and the blade 12 protrudes forward of the movable body 11. in this way,
Since the both sides of the notch groove 13a are fitted into the notch 12a, the blade 12 is held without shaking with respect to the movable body 11. A rotating shaft 14 is formed at a portion of the blade 12 that is fitted into the recess 13 of the movable body 11. The rotating shaft 14 is formed in a shape in which a stopper pin 14b is protruded from the center of a large-diameter main shaft 14a, and the main shaft 14a is engaged with the terminal fitting 2.

The movable body 11 of the blade block 10 is housed in a housing recess 22 of a support body 20 formed of an insulating material such as a synthetic resin. The storage recess 22 is formed at the front of the support body 20 and is open both forward and vertically. The support body 20 is formed by connecting a pair of half bodies 20a and 20b, and one half body 2a
A plurality of (four) connecting hooks 23 are provided on 0a as projections toward the other half body 20b, and the other half body 20b is formed as a concave portion engaging with the connecting hook 23. Is formed. The connecting hooks 23 are provided one by one on both sides of the storage recess 22 and also provided on the rear part of the support body 20. The two half bodies 20a and 20b are unevenly connected at three places, so that the two half The bodies 20a and 20b are connected without lifting at any part.

By the way, the support 20 holds the terminal fitting 2 between the two halves 20a and 20b, and the front end of the terminal fitting 2 is exposed to the inner peripheral surface of the storage recess 22. The rear end protrudes from the rear surface of the support 20. A shaft hole 25 that fits into the main shaft 14a of the rotating shaft 14 of the blade blade block 10 is formed in a portion of the terminal fitting 2 that is exposed inside the storage recess 22. The periphery of the shaft hole 25 is Circular rib 25a protruding outward
Is formed. A spring washer 26 is provided outside the circular rib 25a.
Is provided, and a stopper pin 14b protruding from the rotating shaft 14 is caulked and fixed to the spring washer 25. That is, the plug blade 12 is rotatably held with respect to the terminal fitting 2 in a form in which the terminal fitting 2 is sandwiched between the spring washer 25 and the base of the plug blade 12. Since the spring washer 25 has a spring force for pressing the terminal fitting 2 toward the blade 12, an appropriate frictional force acts between the blade 12 and the terminal fitting 2. 12 can be stopped at any position with respect to the terminal fitting 2.

On the other hand, a terminal portion 21 serving as a crimp terminal is formed at the rear end of the terminal fitting 2 projecting from the rear surface of the support 20. As shown in FIGS. 1 and 4, the terminal portion 21 has a substantially U-shaped cross section, and its open side is opened in the same direction, that is, upward. On both sides of the terminal portion 21, crimping pieces 21a for crimping the core wire 1a of the electric wire 1 are integrally formed. Also, as shown in FIG.
Alternatively, a caulking piece 21b for holding the jacket 1b of the electric wire 1 may be formed. As shown in FIG. 6, the terminal parts 21 of the pair of terminal fittings 2
Each is bent inward at a predetermined angle θ. Here, as shown in FIG. 7, if the terminal portions 21 of the terminal fittings 2 protrude in a straight line, it is necessary to perform a forming process after the wire 1 is crossed, resulting in poor workability. Become. However, in the present invention, since the terminal portion 21 is bent inward in accordance with the shape after the electric wire 1 is crossed over, the forming process of the electric wire 1 becomes unnecessary, and the workability is improved. Therefore, by inserting the core wire 1a of the electric wire 1 into the terminal portion 21 and caulking, the electric wire 1 is connected to the terminal portion 21.

A pair of press-fitting pieces 27 are protruded from front and rear intermediate portions of each terminal fitting 2. The press-fitting piece 27 is formed in a tapered shape, and is press-fitted into a fixing hole 28 formed in one half body 20b as shown in FIG. Half body 20b
Is provided with a pair of convex ribs 29, and fixing holes 28 are formed on both sides of each convex rib 29, respectively. As described above, the terminal fitting 2 is fixed to the half body 20b by press-fitting the press-fitting piece 27 into the fixing hole 28, and the plug blade 12 is rotatably connected to each terminal fitting 2. The blade block 10 is halved with respect to the half body 20b.
It is kept at 0b. The half body 20b holding the blade block 10 and the terminal fitting 2 is attached to the other half body 20a.
Is connected, the blade block 10 is rotatably held with respect to the support 20.

That is, the assembling process of the blade block 10 and the support 20 is summarized as follows. First, as shown in FIG. 4 (a), the blade 12 and the terminal fitting 2 are rotatably connected by the spring washer 26, and then, as shown in FIG. 4 (b), between the blades 12. The movable body 11 is sandwiched, and then the terminal fitting 2 is pressed into the fixing hole 28 of one half body 20b as shown in FIG. 4 (c). Thereafter, as shown in FIG. 4 (d), the other half body 20a is connected, and the electric wire 1 may be crimped to the terminal portion 21.

While the blade block 10 and the support body 20 are combined,
After the electric wire 1 is connected to the terminal fitting 2, as shown in FIG. 2, an outer shell 30 made of vinyl chloride or the like is formed on the support 20.
Are simultaneously formed. Here, through holes 31a and 31b are formed at portions of the support 20 where the coupling hooks 23 are formed, and the through holes 31a and 31b pass through a part of the coupling hole 24 to form the support 20. It penetrates both sides. Further, the support 20 is located adjacent to the front of the coupling hole 24 formed at the front end of the support 20.
Are formed on the front and back of the device. Further, the peripheral surface of the support 20 near the through holes 31a, 32 is formed in an uneven shape. Therefore, when the outer shell 30 is simultaneously formed on the support 20, the material forming the outer shell 30 is provided with through holes 31a, 32b,
32 is also filled, the engagement hook 23 is fixed by the outer shell 30, and the two halves 20a, 20b and the outer shell 30 are securely connected. That is, the through holes 31a, 32b, and 32 function as a peeling prevention unit. Further, the bonding strength of the outer shell 30 to the support 20 is also increased by the unevenness of the peripheral surface of the support 20. Also support
A step portion 33 is formed around substantially the entire circumference of the storage recess 22 of 20, and when forming the outer shell 30 at the same time, the material forming the outer shell 30 is formed by the step 33. It is designed to be dammed. Also, as shown in FIG. 8, the terminal 21 side of the terminal fitting 2 is also linearly connected to the electric wire 1 and has a tapered shape from the terminal fitting 2 side to the electric wire 1, so that the outer shell 30 is formed simultaneously. Even if it is done, the constricted shape can be taken, so the design is good.

[Effects of the Invention] In the first aspect, since the support is formed by connecting the projections and the recesses of the pair of half bodies unevenly, the step of caulking the pins is unnecessary, and the assembling work is easy. Therefore, there is an advantage that the assembling work of the insertion plug becomes easier. Moreover, since the open surface of the terminal portion having a U-shaped cross section provided on the terminal fitting is parallel to and in the same direction as the opposing surfaces of the two halves, the core plug of the electric wire is inserted from the same direction with respect to the terminal portion of the terminal fitting. The two electric wires can be caulked at the same time, which also has the advantage that the productivity is improved. Furthermore, since the outer shell is simultaneously formed so as to cover the outer periphery of the support composed of a pair of halves, the pair of unevenly coupled halves are not opened when the blade block rotates. It has the advantage that it can be joined by a shell.

According to the second aspect of the present invention, since the peel prevention portion formed so as to straddle the two halves is filled with a part of the outer shell, the outer shell reinforces the bonding force between the two halves and supports the two. This has the advantage that the bonding strength of the outer shell to the body can also be increased to prevent peeling of the outer shell.

According to the third aspect of the present invention, since the terminal portions of the two terminal fittings are bent at a predetermined angle corresponding to the direction in which the end of the electric wire is cracked, forming processing after crossing the end of the electric wire is unnecessary. In addition, the outer shell shape can be adapted to the state of the end crack of the electric wire, and an effect of providing a plug that is good in design can be provided.

[Brief description of the drawings]

1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view of the same, and FIGS. 3 (a) and 3 (b) are partially cutaway rear views of the other half used respectively. FIG. 4 is a process diagram showing an assembling sequence of the blade block and the support member in the above, FIG. 5 is a perspective view of a main part of another embodiment of the terminal part in the above, and FIG. FIG. 7 is a comparative explanatory view of the above, FIG. 8 is a plan view of a main part of the same, FIG. 9 is a cutaway plan view showing a conventional example, and FIG. 10 is an exploded perspective view of the same. . DESCRIPTION OF SYMBOLS 1 ... Electric wire, 1a ... Core wire, 2 ... Terminal fitting, 10 ... Blade block, 12 ... Blade blade, 14 ... Rotating shaft, 20 ... Support body,
20a, 20b: Half body, 21: Terminal part, 23: Connection hook, 24: Connection hole, 31a, 32b, 32 ... Through hole.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-128480 (JP, A) JP-A-61-128481 (JP, A) Fully open 1979-192680 (JP, U) Really open 1984 14279 (JP, U)

Claims (3)

(57) [Claims] A blade block having a pair of blades projecting therefrom;
A support for holding a blade block so that a pair of terminal fittings each having one end electrically connected to the blade are provided and rotatable around a rotation axis along a direction in which the blades are arranged; An outer shell formed simultaneously so as to cover the support, wherein the support has a projection provided on one of the pair of halves and a recess provided on the other half of the pair. A cross section U formed by crimping the core wire of the electric wire to the other end side of the pair of terminal fittings.
A plug having a character-shaped terminal portion and an open surface of both terminal portions being parallel to and in the same direction as the opposing surfaces of both halves. 2. The plug according to claim 1, further comprising a separation prevention portion formed so as to straddle the two halves and fill a part of the outer shell in the vicinity of the blade block in the support. . 3. The insertion plug according to claim 1, wherein the terminal portions of both terminal fittings are bent at a predetermined angle corresponding to a direction in which the end of the electric wire is cracked.