JP2654085B2 - Insert plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an insertion plug used by being inserted into an outlet.

[Prior Art] As this type of insertion plug, as shown in FIGS. 7 and 8, a blade block 10 having a pair of blades 12 is used.
And a terminal fitting 21 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. It is known that the support blade 20 is provided and the plug blade 12 is rotatably connected to the terminal fitting 21. The support body 20 is a terminal fitting 21
Is formed by combining a pair of halves 20a 'and 20b', and a pin 42 is inserted into a hole 41 formed in both halves 20a 'and 20b' to mount the pin 42. The two halves 20a 'and 20b' are joined by tightening
-128481).

A shell 30 formed at the same time around the support body 20 is mounted, and a part of the shell 30 is divided into the two halves 20a ′, 20a.
It is filled in a through hole 32 ′ penetrating through the support 30 so as to straddle b ′. As described above, the through hole 3 penetrated through the support 20
Since a part of the outer shell 30 enters the 2 ', the bonding force between the support 20 and the outer shell 30 is increased, and the half bodies 20a, 20b are also connected by the outer shell 30. is there.

[Problem to be Solved by the Invention] However, in the conventional configuration, the through hole 32 ′ is
Are formed at a portion relatively far from the front end of the support body 20, so that the half bodies 20a 'and 20b' at the front end of the support 20 are formed.
There is a problem in that the bonding strength between them is weak, and the half bodies 20a 'and 20b' are easily opened. In addition, since the peripheral surface of the support 20 is formed relatively smoothly around the through hole 32 ', the bonding force between the support 20 and the outer shell 30 is weak,
There is a problem that the outer shell 30 is easily peeled off from the support 20.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, and prevents opening of a half body at a tip end portion of a support, and increases a bonding force between the support and an outer shell. It is intended to provide such an insertion plug.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a support is formed by combining a pair of halves, and a straddle over both halves is formed near the tip of the support. The through-hole is formed through the outer shell and is filled with the outer shell, and an irregular peel prevention part is formed on the outer peripheral surface of the support covered with the outer shell near the through-hole. is there.

[Operation] According to the above configuration, since the outer shell is filled in the through hole formed near the front end of the support, the front end of the support is pressed by the outer shell, and The opening of the half body is prevented. In addition, the outer shell and the support are formed by forming an uneven peeling prevention portion on the outer peripheral surface of the support covered with the outer shell near the through hole formed near the tip of the support. The contact area between the support and the outer shell increases, and the bonding strength between the support and the outer shell increases.

[Embodiment] As shown in FIGS. 1 and 5, a blade block 10 in which the base of a blade 12 is held on both side surfaces of a movable body 11, and a support for rotatably holding the blade block 10 Body 20 and an outer shell 30 covering the periphery of the support 20. Each support 20 has a pair of terminal fittings 21 electrically connected to the blade 12.
Is delivered.

The movable body 11 of the blade block 10 is formed of an insulating material such as a synthetic resin in a shape in which the front side is flat and the rear side is arcuate, and the recesses on both sides are fitted with the base of the blade 12. 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 movable body 11 is engaged with both sides of the notch groove 13a of FIG.
The blade 12 protrudes in front of. Thus, the notch
Since the both sides of the notch groove 13a are fitted to the 12a, the blade 12 is held in the movable body 11 without shaking. 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. Rotating shaft 14
Is formed in a shape in which a stopper pin 14b protrudes from the center of a large-diameter main shaft 14a, and the main shaft 14a engages with the terminal fitting 21.

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 at 0a toward the other half body 20b, and a connecting hole 24 to be engaged with the connecting hook 23 is formed at the other half body 20b. You. As shown in FIG. 2, the connecting hooks 23 are provided one by one on both sides of the storage recess 22, and a pair is provided on the rear part of the support 20, and the two half bodies 20a and 20b are connected at three places. As a result, the two halves 20a and 20b are connected to each other without lifting at any positions. That is, the half bodies 20a,
When 20b is fixed at one place (for example,
In the conventional example as disclosed in Japanese Patent Application Laid-Open No. -128481, the opening between the two halves 20a and 20b may be opened due to external force at a location far from the fixing portion. Is fixed at three places, opening of the mouth can be prevented. By the way, both halves 20
The terminal fitting 21 is held between a and 20b, and the front end of the terminal fitting 21 is exposed on the inner peripheral surface of the storage recess 22.
The rear end of 21 protrudes from the rear surface of support 20. Terminal fitting 21
A shaft hole 25 that fits into the main shaft 14a of the rotary shaft 14 of the blade blade block 10 is formed in a portion exposed inside the storage recess 22 in FIG. An annular ridge 25a protruding from the opposite side is formed. A peripheral portion of a spring washer 26 abuts on the ridge 25a, and a stopper pin 14b protruding from the rotating shaft 14 is caulked and fixed to the spring washer 26. In other words, the blade 12 is held rotatably with respect to the terminal 21 in a form in which the terminal 21 is sandwiched between the spring washer 26 and the base of the blade 12. Since the spring washer 26 has a spring force for pressing the terminal fitting 21 toward the blade 12, an appropriate frictional force acts between the blade 12 and the terminal 21. The terminal 12 can be stopped at an arbitrary position with respect to the terminal fitting 21. On the other hand, a terminal portion 21a serving as a crimp terminal is formed at the rear end of the terminal fitting 21 projecting from the rear surface of the support 20. Therefore, terminal part 2
By crimping the wire 1a to the wire 1, the wire 1 is connected to the terminal portion 21a. A pair of press-fitting pieces 27 are protruded from front and rear intermediate portions of each terminal fitting 21, respectively. 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. 3, a pair of convex ribs 29 protrude from the half body 20b, and fixing holes 28 are formed on both sides of each convex rib 29, respectively. As described above, the terminal fitting 21 is pressed into the fixing hole 28 so that the terminal fitting 21 is
Since the blade 12 is rotatably connected to each terminal fitting 21, the blade block 10 is held by the half body 20b with respect to the half body 20b. Because By connecting the other half body 20a to the half body 20b holding the blade block 10 and the terminal fitting 21 in this manner, the support
The blade block 10 is held rotatably with respect to 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 21 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 clamped, and then the terminal fitting 21 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 may be connected, and the electric wire 1 may be connected to the terminal portion 21a.

While the blade block 10 and the support body 20 are combined,
After the electric wire 1 is connected to the terminal fitting 21, as shown in FIG. 5, an outer shell 30 made of vinyl chloride or the like is provided 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, in the vicinity of the through-holes 31a and 32, the support 20 covered with the outer shell 30 is provided with an uneven peel prevention portion 34 on the outer peripheral surface thereof. Therefore, when the outer shell 30 is molded simultaneously with the support 20, the material forming the outer shell 30 is also filled in the through holes 31a, 32b, 32,
While the locking hook 23 is fixed by the outer shell 30,
The two halves 20a, 20b and the outer shell 30 are securely connected. In particular, since the through hole 32 is formed near the front end of the support 20, the half-pieces 20a and 20b are prevented from opening near the front end of the support 20. Also,
Since the uneven peel prevention portion 34 is formed on the peripheral surface of the support 20, a part of the outer shell 30 bites into the support 20, and the bonding force of the outer shell 30 to the support 20 is reduced. It becomes big. Further, a step portion 33 is formed around substantially the entire periphery of the storage recess 22 of the support 20, and when the outer shell 30 is simultaneously molded, a material forming the outer shell 30 is formed. The step portion 33 is adapted to be dammed.

As shown in FIG. 6, in order to further increase the bonding force of the outer shell 30 to the support 20 and particularly to increase the bonding force of the outer shell 30 to an external force acting toward the side of the support 20. Alternatively, a concave groove 33 may be formed at a position on the outer peripheral surface of the support 20 surrounding the periphery of the through hole 32.

[Effects of the Invention] As described above, in the present invention, a support is formed by combining a pair of halves. A through hole is formed to be filled with the shell, and an irregular peel prevention portion is formed on the outer peripheral surface of the support covered with the outer shell in the vicinity of the through hole. Since the outer shell is filled in the through hole formed in the vicinity, the tip of the support is pressed by the outer shell,
This has the advantage that the opening of the half body at the tip of the support is prevented. In addition, the outer shell and the support body are formed by forming irregularities on the outer peripheral surface of the support body covered with the outer shell body in the vicinity of the through hole formed near the tip of the support body. This has the advantage that the contact area between the support and the outer shell increases, and the bonding strength between the support and the outer shell increases. As a result, it is possible to prevent the outer shell from peeling off from the support.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIGS. 2 (a) and 2 (b) are a rear view and a side view respectively showing one half used in the embodiment, and FIGS. 3 (a) (b) ) Is a partially cutaway rear view and a plan view of the other half body used in the same as above.
Fig. 5 is a process diagram showing an assembling sequence of the blade block and the support in the same as above, Fig. 5 is an external perspective view of the same, and Fig. 6 (a).
(B) is a perspective view of a main part and a plan view of a main part showing another configuration example of the above, FIG. 7 is a perspective view showing a conventional example, and FIG.
The figure is an exploded perspective view of a main part of the above. 10 ... Blade block, 12 ... Blade blade, 14 ... Rotating axis, 20 ...
... Support, 20a, 20b ... Half, 21 ... Terminal, 31a, 3
1b, 32: through-hole, 34: peeling prevention part.

Claims (1)

(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 electrically connected to the blade are provided and rotatable around a rotation axis along a direction in which the blades are arranged; and a support. And a shell formed at the same time so as to cover the support body, and the support body is formed by combining a pair of half bodies, and is penetrated in the vicinity of the front end portion of the support body so as to straddle both halves. A through-hole for filling the outer shell is formed, and an irregular peel prevention portion is formed on the outer peripheral surface of the support covered with the outer shell in the vicinity of the through-hole. Plug.