JPH09147674A - Change-over switch unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a superior change-over switch unit which reduces the cost and in which a complete waterproofing structure can be provided. SOLUTION: A switch plug 3 integrated with an operation knob 17 and a contact terminal 18 is formed. In an energized position, the contact terminal 18 of the switch plug 3 is electrically connected to terminals 11, 15, namely, the terminals to be connected to a switch housing 2 and at the same time makes impossible to be detached from the switch housing 2. In an unenergized position, the contact terminal 18 electrically shuts off the terminals 11, 15 and at the same time it can be detached from the switch housing 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a changeover switch unit used for connecting and disconnecting a high voltage circuit or a large current circuit of an electric vehicle or the like.

[0002]

2. Description of the Related Art Conventionally, for example, in a switchboard of a high-voltage circuit, when a cover of the switchboard is opened, a male connector fixed to the cover is pulled out from a female connector fixed to a main body of the switchboard, and the height is increased. It is configured so that the continuity of the voltage contact is cut off so that an operator does not accidentally touch the electrode and receive an electric shock.

The applicant of the present invention has also previously disclosed Japanese Patent Laid-Open No. 6-31.
Japanese Patent No. 0227 proposes a connector device that also serves as a safety plug. As shown in FIG. 11, this connector device 50 rotates about a female connector 52 fixed to a first base body (housing) 51 and a rotation shaft 52 provided at one end of the first base body 51. It is composed of a male connector 54 which is freely supported and is attached to a second base body 53 which serves as a lid for the first base body 51. The one ends 52a and 52b of the female connector 52 are partially exposed on the outer surface of the first base body 51 and are provided so as to be connectable to the high voltage wirings 55a and 55b from the outside.

The male connector 54, as shown in FIG.
A guide 57 attached to the second base 53 with bolts 56, 56, and a connector that is loosely fitted inside the guide 57 and is movable in a direction vertical and horizontal to the axis of the rotating shaft 52. It is composed of a main body 58. The connector body 58 of the male connector 54 includes a rectangular parallelepiped base portion 61 made of an insulating resin material, a guide member 62 vertically extending from the base portion 61, and the base portion 6 parallel to the guide member 62.
1, and electrode pins 63, 63 made of copper, which are vertically installed.
The electrode pins 63, 63 are formed by bending a prismatic metal material into a substantially U shape when viewed from the front.

Then, as shown in FIG. 11, by rotating the second base body 53 in the direction of the arrow WC, the electrode pin 63 of the male connector 54 is formed into the female connector 52 as a pair of insertion holes 52d and 52e. As a result, the high voltage electric wires 55a and 55b connected to the ends 52a and 52b of the first base body 51 are energized. On the other hand, when the power supply is cut off, the second base body 53 is rotated in the direction opposite to the arrow WC to extract the electrode pin 63 from the female connector 52.

[0006]

However, the electrode pins 63, 63 of the connector device 50 are formed by bending a prismatic metal material into a U-shape with high dimensional accuracy so that the protruding lengths toward the female connector 52 side are the same. Processing must be performed, and the pair of insertion holes 52d and 52e of the female connector 52 are further processed.
Since the positional accuracy of the mounting is required so that it can be smoothly inserted, the cost is high due to manufacturing problems.

The second base body 53 of the connector device 50 is attached to the first base body 51 as a lid of a one-sided hinge that is rotatable in the arrow WC direction. Therefore, in order to make such a connector device 50 waterproof, it is necessary to seal all the contact portions between the first base 51 and the second base 53. However, it is difficult for the second base body 53, which is a lid of such a one-sided hinge, to obtain a uniform contact pressure over the entire circumference of the side wall portion of the first base body 51, and the connector device 50 has a sufficient sealability. Was difficult to maintain.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems, and to provide a good changeover switch unit capable of reducing the cost and providing a complete waterproof structure.

[0009]

The above object of the present invention is to provide a switch housing provided with a pair of terminals to be connected, an operating portion and a contact terminal, which are integrally rotatably supported by the switch housing. A changeover switch unit having a plug, wherein the switch plug electrically connects the connected terminal of the switch housing in the energized position to the connected terminal of the switch housing, and the switch plug is non-detachable from the switch housing, and contacts in the non-energized position. The changeover switch unit is characterized in that the terminal electrically disconnects the connected terminal of the switch housing and is removable from the switch housing. Further, preferably, waterproof means is provided at a contact portion between the switch plug and the switch housing.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a changeover switch unit according to the present invention will be described in detail below with reference to the accompanying drawings. The changeover switch unit 1 of the present invention shown in FIG. 1 has a structure which also serves as a fuse box, and includes a fuse 9 together with a switch housing 2 and a switch plug 3.
It has.

An electric wire 4 is held in the switch housing 2 via a sealing material 5 and a rear holder 6,
The terminal 7 connected to the end of the electric wire 4 is connected to the switch housing 2 together with one terminal 10 of the fuse 9 via the bolt 8.
Attached to. The other end of the fuse 9 and the other terminal 11 of the fuse 9 are in contact with the fixed piece 2a of the switch housing 2, so that the fuse 9 is electrically connected to the electric wire 4 inside the switch housing 2. Is arranged at a predetermined position.

As shown in FIG. 2, terminals 10 and 11 provided at both ends of the fuse 9 are arranged in a state of being displaced by 90 degrees from each other, and one terminal 10 is provided with a hole for bolting. There is. In the present embodiment, the fuse 9
Since the other terminal 11 of the switch housing 2 is one of the connected terminals of the switch housing 2 that is electrically connected to the contact terminal 18 of the switch plug 3 described later, a new terminal for the switch is connected to the other terminal 11. It is not necessary to make a connection, and it is not necessary to form a hole for bolting for connecting a new terminal to the other terminal 11 of the fuse 9.

Further, the switch housing 2 has an electric wire 12
Is held via the sealing material 13 and the rear holder 14, and the terminal 15 crimped to the end of the electric wire 12 is attached to the switch housing 2 by the terminal stopper 16 as shown in FIG. The terminal 15, which is the other connected terminal of the switch housing 2 electrically connected to the contact terminal 18 of the switch plug 3, is arranged at a position facing the terminal 11 of the fuse 9.

The terminal 11 of the fuse 9 and the electric wire 12
The switch plug 3 is disposed between the switch plug 3 and the terminal 15. As shown in FIG. 4, the switch plug 3 includes an operation knob 17 which is an operation portion and a contact terminal 18, which are integrated with each other. As will be described later, by switching the operating knob 17 of the switch plug 3 between the energized position and the non-energized position, the changeover switch unit 1 is switched between the conductive state and the non-conductive state.

FIG. 5 shows a changeover switch unit 1 of the present invention.
FIG. 6 is a cross-sectional view of a main part showing a mounted state of the switch plug 3 of the first embodiment according to the first embodiment. The operation knob 17 has a cylindrical boss portion 20 formed on the lid portion 20 of the switch housing 2.
It is rotatably supported on the outer peripheral portion of a. Operation knob 1
The inner peripheral surface of 7 is in sliding contact with an O-ring 19 which is a waterproof means fitted in an annular groove formed on the outer peripheral surface of the boss portion 20a, and the outer peripheral surface of the boss portion 20a and the operation knob 17 are provided.
The inner peripheral surface of the is sealed. A pair of locking protrusions 17a, 17a are formed on the inner peripheral portion of the operation knob 17 so as to face each other. The locking protrusions 17a, 17a are formed on the boss portion 2a.
It is movably fitted in the guide grooves 21 and 21 formed on the outer peripheral surface of 0a.

FIG. 6 is a perspective view of the boss portion 20a.
The guide groove 21 described with reference to FIG. 5 includes a holding groove 21a formed along the circumferential direction on the outer periphery of the boss portion 20a, and the holding groove 2a.
An extraction groove 21 formed in the axial direction so as to communicate with 1a.
b. Each locking projection 17a is located at the P1 position of the holding groove 21a when the operation knob 17 is in the energized position, and is held in the holding groove 21a when the operation knob 17 is in the non-energized position.
It is located at P2 position. Therefore, when the operation knob 17 is in the energized position (P2), the locking projections 17a, 17a are provided.
Can be raised along the take-out grooves 21b, 21b,
The switch plug 3 can be pulled out from the switch housing 2. Since the locking projections 17a, 17a are formed at the tip of the flexible piece, the take-out grooves 21b, 21a are formed.
It is possible to get over the O-ring 19 when ascending along b.

Further, the contact terminal 1 of the switch plug 3
As shown in FIG. 4, 8 is formed in a substantially S-shape having a spring property. A protrusion 18c is integrally formed with the contact terminal 18, and the protrusion 18c is rotatably supported in the recess 2b (see FIG. 5) of the switch housing 2. Then, the contact terminal 18 is operated by switching the operating knob 17 to the energized position or the non-energized position.
The switch is switched to the energized position (see FIG. 7) or the non-energized position (see FIG. 8) integrally with.

The operation of the changeover switch unit 1 of the present invention constructed as described above will be described with reference to FIGS. 7 and 8. First, the case of switching the changeover switch unit 1 to the conductive state will be described. As shown in FIG. 7, when the operation knob 17 is rotated from the non-energized position to the energized position,
One end 18a of the contact terminal 18 has the terminal 1 of the fuse 9
1, and the other end 18b electrically contacts the terminal 15 connected to the electric wire 12. As a result, the terminals 11 and 15 of the fuse 9 are electrically connected. In this case, the locking projections 17a, 17a of the operation knob 17 have the holding groove 21 of the guide groove 21 formed on the outer peripheral surface of the boss portion 20a.
Move to the P1 (see FIG. 6) position along a. Therefore, the operation knob 17 does not come off from the boss portion 20a.

Next, the case of switching the changeover switch unit 1 to the non-conducting state will be described. As shown in FIG. 8, when the operation knob 17 is rotated approximately 90 degrees from the energized position to the non-energized position, the electrical contact between the one end 18a of the contact terminal 18 and the terminal 11 of the fuse 9 is released, and the other end is released. The electrical contact between the end portion 18b of the and the terminal 15 is also released.
Thereby, the terminal 11 of the fuse 9 and the terminal 1 of the electric wire 12
The connection with 5 is cut off. In this case, the locking projections 17a, 17a of the operation knob 17 are provided along the holding groove 21a of the guide groove 21 formed on the outer peripheral surface of the boss portion 20a.
Move to the position P2 (see FIG. 6) communicating with b. Therefore, the locking projections 17a, 17a are not attached to the extraction grooves 21b, 2
It becomes possible to move up along 1b, and the operating knob 17, that is, the switch plug 3 can be pulled out from the switch housing 2.

That is, in the changeover switch unit 1, in the switch plug 3 including the operation knob 17 and the contact terminal 18, the terminals 11 and 15 which are a pair of connected terminals in the switch housing 2 are not electrically connected. It can be removed from the switch housing 2 only in the state. Therefore, an operator can reliably disconnect the circuit in the switch housing 2 by pulling out the switch plug 3 from the switch housing 2.
It is possible to prevent erroneous recognition of the switching state.

Therefore, according to the changeover switch unit 1 of the present invention, the contact terminal 18 of the switch plug 3 arranged between the terminal 11 and the terminal 15 which are a pair of connected terminals in the switch housing 2. Since a high mounting accuracy is not required and the assembling is easy, it is possible to suppress an increase in manufacturing cost as compared with the conventional circuit breaking means which is interlocked with opening and closing of the lid.

Further, according to the present invention, the switching of the circuit in the switch housing 2 is performed by the attachment / detachment of the switch plug 3, and it is not necessary to form the lid portion 20 as a lid of a one-sided hinge. It is easier to seal the lid portion 20 and the switch housing 2 than the circuit changeover switch including the lid. Further, the waterproof means provided at the contact portion between the operation knob 17 and the switch housing 2 is sufficient with the O-ring 19 having a small size and a simple structure, and the changeover switch unit 1 can easily obtain a good waterproof structure.

In the first embodiment, the operation knob 1
The case where the switch plug 3 is detachably attached to the switch housing 2 side by the locking projections 17a and 17a formed on the switch housing 2 has been described, but the present invention is not limited to this and various forms can be adopted. Of course. For example, FIG. 9 is a cross-sectional view of essential parts showing a mounted state of the switch plug 30 of the second embodiment according to the changeover switch unit of the present invention. In the second embodiment, the same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The switch plug 30 has an operation knob 31 which is an operation portion and a contact terminal 32, which are integrally formed. The operation knob 31 is a cylindrical boss formed on the lid portion 20 of the switch housing 2. It is rotatably supported in the portion 37. An annular groove 3 is provided on the outer circumference of the operation knob 31.
1a is formed, and O as a waterproofing means is provided in the annular groove 31a.
The ring 33 is fitted. The O-ring 33 fitted in the operation knob 31 is brought into sliding contact with the inner peripheral surface of the boss portion 37, and seals between the outer peripheral surface of the operation knob 31 and the inner peripheral surface of the boss portion 37.

Further, the contact terminal 32 of the switch plug 30 is formed in a substantially S-shape having a spring property like the contact terminal 18 of the first embodiment. The contact terminal 32
A pair of locking projections 34, 34 extending in the radial direction are formed at the end of the shaft 32a of the locking projection 3a.
4, 34 are rotatably fitted in holding holes 35 formed in the wall of the switch housing 2.

As shown in FIG. 10, the holding hole 35 is
Slit opening 3 through which the locking projections 34, 34 can be inserted
It is a cylindrical space that extends inward and communicates with the outside via 6. The locking projections 34, 34 are located at the P1 position in the holding hole 35 when the operation knob 31 is in the energized position, and are located in the P2 position in the holding hole 35 when the operation knob 31 is in the energized position. Therefore, when the operation knob 31 is in the non-energized position, the locking projections 34, 34 abut the upper wall surface in the holding hole 35, and the switch plug 30 cannot be pulled out. On the other hand, when the operation knob 31 is in the energized position, the locking projections 34, 34 coincide with the slit opening 36, and the switch plug 30 can be pulled out from the switch housing 2.

[0027]

As described above, according to the changeover switch unit of the present invention, the switch plug in which the operating portion and the contact terminal are integrated has the contact terminal electrically connecting the connected terminal of the switch housing at the energized position. Is electrically connected to the switch housing and is not detachable from the switch housing. In the non-energized position, the contact terminal electrically disconnects the connected terminal of the switch housing and is detachable from the switch housing. By the operation of pulling out the switch housing from the switch housing, the circuit in the switch housing can be surely cut off, and erroneous recognition of the switching state can be prevented.

Further, the contact terminals of the switch plug arranged between the pair of connected terminals do not require high mounting accuracy and are easy to assemble. It is possible to suppress an increase in manufacturing cost as compared with the means. In addition, since the circuit in the switch housing is switched by attaching and detaching the switch plug, and it is not necessary to configure the lid portion as a lid of the single hinge, the lid portion is different from the conventional circuit changeover switch including the lid of the single hinge. And the switch housing can be easily sealed. Moreover, the waterproof means provided at the contact portion between the operation knob and the switch housing may be a packing having a small and simple structure such as an O-ring, and the changeover switch unit of the present invention can easily obtain a good waterproof structure.

[Brief description of the drawings]

FIG. 1 is a sectional view of a changeover switch unit according to an embodiment of the present invention.

FIG. 2 is an overall perspective view of a fuse used in the changeover switch unit shown in FIG.

3 is an overall perspective view showing a terminal of an electric wire used in the changeover switch unit shown in FIG.

FIG. 4 is an overall perspective view of the switch plug of the first embodiment according to the changeover switch unit of the present invention.

5 is a cross-sectional view of essential parts showing a mounted state of the switch plug shown in FIG.

FIG. 6 is an overall perspective view of a boss portion shown in FIG.

FIG. 7 is an illustration showing a state in which the contact terminals of the switch plug shown in FIG. 4 are arranged in the energized position.

FIG. 8 is an illustration showing a state in which the contact terminals of the switch plug shown in FIG. 4 are arranged in a non-energized position.

FIG. 9 is a cross-sectional view showing a mounted state of a switch plug according to a second embodiment of the changeover switch unit of the present invention.

10 is a cross-sectional view taken along the line XX of FIG.

FIG. 11 is an overall perspective view of a conventional connector device that also serves as a safety plug.

12 is a sectional view taken along the line XII-XII of FIG.

[Explanation of symbols]

 1 Switching Switch Unit 2 Switch Housing 3 Switch Plug 9 Fuse 11 Terminal 15 Terminal 17 Operation Knob 18 Contact Terminal 19 O-ring

Claims (2)

[Claims] 1. A changeover switch unit comprising a switch housing having a pair of connected terminals, and a switch plug in which an operating portion and a contact terminal are integrally supported rotatably on the switch housing. When the switch plug is in the energized position, the contact terminal electrically connects the connected terminal of the switch housing and cannot be detached from the switch housing, and in the non-energized position, the contact terminal electrically connects the connected terminal of the switch housing. A changeover switch unit characterized in that it is electrically disconnected and can be detached from the switch housing. 2. The changeover switch unit according to claim 1, wherein waterproof means is provided at a contact portion between the switch plug and the switch housing.