JPS6132977A - Rotary connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a rotary connector that prevents twisting of power supply wires, etc. connected to an electric appliance by making them rotatable relative to the housing of the electric appliance. be.

[Background Art] - In a device such as a hair dryer for curling hair that is used while rotating one device, the electric wire for power supply to the device is connected to the device via a rotating connector to prevent twisting. However, conventional rotary connectors have the drawback of poor assembly and repairability. That is, FIGS. 9 and 10 show a conventional rotary connector for a hair dryer, but a pair of Φ contact metal fittings υ(5)
The plug (2) has an annular groove (B) formed on its outer periphery and a 950 mm groove formed on the edge of the cylindrical portion (10) protruding from the rear end of the housing (1). The structure was such that the plug (2) was directly held by the housing and was rotatably supported around the shaft and prevented from being removed by engaging with the housing. When assembling the housing (1), connect the power wire l;
It has to be done with the connected plug (2) attached, which is not easy to assemble, and the plug cannot be removed without opening the J"S screw, making it difficult to repair. Also, (3) in the figure is the cylindrical part (lO)
A jack disposed inside the contact fitting (21) (
It consists of a pair of terminal pieces (31H32) that slide into contact with the terminal pieces (31 and 3), respectively, and a holding part (G) that is molded at the same time as both terminal pieces (31...). (4) is formed in two pieces. A ring that connects the housing (1) by being placed over the outer periphery of the cylindrical part (10), ←The illusion is the hook in the ring (4), ;:/The connecting hook with the housing (1), (6) is the housing (1) is a filter that is placed over the air inlet on the rear outer periphery, (6) is a connector cover, and (3) is a cord push sink that is integrally molded with plug (2).

[Object of the Invention] The present invention has been made in view of the above points, and its object is to provide a rotary connector with improved ease of assembly and repair.

[Disclosure of the invention]

Accordingly, the present invention includes a cylindrical part that protrudes from a housing and has a pair of terminal pieces disposed therein, and a pair of contact fittings that slide into contact with the pair of terminal pieces, so that rotation around an axis is prevented within the cylindrical part. It is characterized in that it consists of a plug that is inserted freely and a ring that is equipped with a rotation holding part for the plug and can be attached to and removed from the cylindrical part, and the rotation of the plug is not held by the housing. The present invention is described below based on the illustrated embodiments.@1
6 to 6 show an embodiment of a hair dryer, in which a cylindrical portion (10) is protruded from the center of the rear end of the housing Il, which is divided into two parts.
A jack (3) is arranged inside the 1O). The jack (3) is composed of a pair of terminal pieces and a holding part which is molded at the same time as these.
The holding part here is provided with an insertion guide hole penetrating in the axial direction at the front end, and each terminal piece is
The holding part in 32 - The part I/'i located inside the cylindrical part at the rear end is U-shaped with insert pieces at both ends as shown in FIG. As shown in FIG. 5, a t pallet (ilI19) is integrally formed on the front end surface of the holding part-○ to partition the two terminal pieces @Il(a).

Plug (2) I inserted into the cylinder from the rear end opening
/i, A pair of annular contact fittings (3) with different diameters are arranged on the outer peripheral surface, and the contact fitting C2υ with the smaller diameter is located further forward in the axial direction than the other contact fitting (good). Position to,
Furthermore, a guide pin (24) is protruded from the tip, and the rear outer peripheral surface has an annular ring (2υ), and the rear end has a cord with a hanging hole. It is formed.

(4) in the figure shows 2
This is a connecting ring that connects the split housing (1).
A connecting hook (41) that engages with the inner surface is provided protrudingly, and the rear end is separated into four pieces by two pairs of notches K as shown in Figure 3. The rear edges of two of these pieces have ribs (B) that protrude inward, and the rear edges of the remaining two pieces have L-shaped ribs (B) that protrude inward and then point forward. 41 (4 and 9 are provided protrudingly.

However, in the rotary connector of the lever, first, the annular rib (11) protrudes from the rear inner circumferential surface of the cylindrical portion (the rear inner circumferential surface of the lever), and the protrusion a'!J shown in FIG. Assemble the two halves of the housing il+ with the jack (3) stored between them, and then insert the plug (2) into the cylindrical part (1).
0). Next, put the ring (4), which had been passed through the plug (2) and the power line in advance, over the cylindrical part (10),
The connecting hook (1) is engaged with the housing (1), and the filter (5) is then attached. In the figure, - indicates the through hole of the connecting hook (41) in the housing fl).

The rotary connector assembled in this way has a plug (2
) is the annular rib (11) of the cylindrical part (10).
and the lip (43) of the ring (4), and allows the plug (2) to freely rotate around the axis relative to the housing +1+, and is prevented from being removed. In this case, the L-shaped rib on the ring (4) has its tip inserted into the inside of the cylindrical part (lO), eliminating the gap of the plug (2), and at the same time protecting the enclosure of the ring (4) itself. In addition, when inserting the plug (2) into the cylindrical portion (10), the guide pin first enters the insertion guide hole (to) to guide the insertion, as shown in Fig. 4. Furthermore, by inserting the plug (2), contact between the terminal piece 02 and the contact fitting (3) is started, and the diameter of the guide pin (C) is the same as that of the terminal. Since the distance between the contact part and the contact metal fitting @0 at 3υ is also small, the terminal piece +3
Since the 11C32 has a insert piece (goods), insertion of the plug (2) is smooth, and the terminal piece @
There is no risk of deforming 1l(9). Note that since the insertion guide hole fits within the entire axial length of the separator door, the provision of the insertion guide hole does not increase the overall length of the rotary connector.

FIG. 7 shows another embodiment for a hair dryer. The rotary connector here consists of a ring (4) and a plug (2).
) are integrally connected, and an annular lip (44J) is provided at the rear end of the plug (2) to engage with an annular groove formed on the outward facing surface of the plug (2). The pair of connecting hooks @1) of the ring (4) are attached to the housing (1).
), the plug (2) can also be attached and detached. (6) in the figure is a connector cover.

In addition, in the one shown in Fig. 7, the overall length of the cylindrical part (10) is shortened, and at the same time, the rear cylindrical part of the holding part (3) is also eliminated, but as shown in Fig. 8, Of course, the length may be such that the jack (3) is completely accommodated within the cylindrical portion (lO), or the jack (3) may have the same configuration as the above embodiment.0 [Effects of the Invention] As described above, in the present invention, the plug is not directly rotatable in the housing, but is held by a ring that is detachably attached to the cylindrical portion of the housing, so that assembly of the housing is easy. The plug can be attached later, and the housing can be assembled without being disturbed by the power line, and it is easy to assemble and has good repairability.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of the embodiment of the zero-starter, Fig. 2 is a transverse cross-sectional view of the same, Fig. 3 is an exploded perspective view of the same, Fig. 4 is a longitudinal cross-sectional view of the same as the above when the plug is inserted, Figure 5 is a view from arrow A in Figure 4.
@Figure 6 shows the same jack housing as above, (2) brush, (3) jack, (4) ring, (10) cylinder, (21) contact metal fitting, □□□ guide pin, (31
) (32 is a terminal piece, @3 is an insertion guide hole. Agent Patent Attorney Ishi 1) Chief Figure 1 Figure 2 Figure 4 Figure 5 Figure 8 Figure 9 Prisoner Figure 10

Claims (3)

[Claims] (1) A cylindrical part that protrudes from the housing and has a pair of terminal pieces arranged inside, and a pair of contact fittings that slide into contact with the pair of terminal pieces, so that the cylindrical part can freely rotate around an axis. A rotary connector comprising an inserted plug and a ring that is provided with a rotation holding part for the plug and is detachably attached to a cylindrical part. (2) A patent characterized in that the plug has a guide pin protruding from its tip, and an insertion guide hole into which the guide pin is inserted is provided in the terminal piece holding part arranged in the cylindrical part. A rotary connector according to claim 1. (3) A patent claim characterized in that a plug and a ring equipped with a rib that engages with an annular groove formed on the outer periphery of the plug to enable the plug to rotate around an axis are integrally connected. Rotary connector according to item 1.