JPS6320032Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a starting switch device for an automobile engine.

In recent years, for example, in diesel engine vehicles, the starting switch device, in addition to its original function, has been relatively equipped with various actuators or fuel injection pumps connected to the lever that opens and closes the intake shutter to start and automatically stop the engine, as well as various accessories. Compound functions are required to operate loads through which a small current flows, and the switch mechanism for operating these functions is built into the start switch, which has the drawbacks of increasing the size of the device and poor installation workability. Ta. Further, there was also the drawback that the operating force for rotating the movable contactor having a large number of contacts increased, resulting in poor operability.

The present invention eliminates the above-mentioned drawbacks, makes it possible to miniaturize a switch mechanism with multiple functions, improves installation workability, and improves operability by minimizing the increase in switch operation force. A further object of the present invention is to provide a starting switch device that facilitates the setting and adjustment of the contact pressure between a fixed terminal and a movable contact.

In order to achieve the above object, the starting switch device according to the present invention includes a cylindrical or cylindrical fixed power supply terminal protruding in the axial direction from the center of the switch base, and a fixed power terminal in the circumferential direction from near the outer periphery of the base. a plurality of fixed terminals protruding in the axial direction at intervals of A starting switch device comprising a first movable contact that is spaced apart, a plurality of flat fixed terminals fixed to the bottom surface of the switch base at appropriate intervals, and an insulating member on the outer peripheral surface of the power supply terminal. a second movable contact made of an elastic metal material, which is rotatably supported via the plurality of flat fixed terminals and is opposed to the plurality of flat fixed terminals; a connecting member made of an insulating material that is engaged from above and connects the second movable contact and the first movable contact; a connecting member that fits into a circumferential groove formed near the tip of the power terminal; It includes a retaining member that prevents the second movable contact from coming off in the axial direction with respect to the power supply terminal, and a resilient member that constantly presses the first movable contact against the tip end surface of the power supply terminal with an appropriate contact pressure. It is characterized by its configuration.

The present invention will be explained below based on an embodiment shown in the drawings.

Fig. 1 is a left side view showing one embodiment of the starting switch device of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is an electrical wiring diagram with the key in the OFF position. A, B, and C are a sectional view taken along the line B-B, C-C, and D-D in Figure 2, respectively, and Figure 4 A is a view taken from the right side of Figure 2. FIG. 4(b) is a connection diagram showing the connection state of each fixed terminal at each operating position of the key, and FIG. 5 is an exploded perspective view showing the main parts of the starting switch device of the present invention.

1 to 5, reference numeral 10 denotes a switch base made of an insulating material, and a plurality of cylindrical fixed terminals 2, 3, 4 are arranged at appropriate intervals from approximately the same circumference near the outer periphery of the base 10. are provided in the axial direction so as to protrude through the switch base 10, respectively, and a fixed cylindrical power supply terminal 1 is connected from the center of the base 10 to a power supply 12 via a battery relay 11 having a coil 11a and a contact 11b. Similarly, the switch base 10 is provided in the axial direction so as to protrude through the switch base. This power supply terminal 1 has its tip surface 1
A hole 1b is formed in the axial direction from a.
b is for pivotally supporting a rotating shaft 26a of a rotor 26, which will be described later. Incidentally, the power supply terminal 1 and each fixed terminal 2, 3, 4 may each have a cylindrical shape.

The plurality of fixed terminals 2, 3, and 4 are connected to a series circuit of a starting motor 13, an electric heating plug 14, a resistor 15, and the electric heating plug 14 through which a relatively large current flows, respectively, but the respective lead wires and each fixed terminal Connections with the fixed terminals 2, 3, and 4 are made by screwing screws 16 into internal threads formed on each of the fixed terminals 2, 3, and 4.

Reference numeral 17 denotes a bottom portion 17a that is in constant contact with the tip end surface 1a of the power supply terminal 1, rising pieces 17b, 17b, 17b rising in the axial direction from the outer peripheral edge of this bottom portion 17a, and elastic metal fixed to these rising pieces 17b, 17b, respectively. The first movable contact is made of metal and has a polygonal shape and is composed of plate contact pieces 17c and 17c'. The contact pieces 17c and 17c' are connected to each of the fixed terminals 2 and 2 depending on the operating position of the
3 and 4 come into contact with and separate from each other. Said bottom part 1
An opening 17d having a diameter smaller than the outer diameter of the power supply terminal 1 and slightly larger than the hole 1b is formed in the center of the hole 7a. The contacts 17c and 17c' protrude outward substantially along the tangential direction of the opening 17d, and are relatively long compared to the size of the switch base 10.

A plurality of flat fixed terminals 5, 6, 7, 8 are fixed to the bottom surface of the switch base 10 at appropriate intervals.
are each connected to a load through which a relatively small current flows. In this embodiment, the fixed terminals 5, 6, 7, and 8 are connected to an accessory 18 such as a radio, an actuator 19 connected to a lever (not shown) for opening the intake shutter for starting the engine, and an actuator 19 for automatically stopping the engine. actuator 2 connected to a lever (not shown) that closes the intake shutter;
0, connect to the coil 11a of the battery relay 11.

9 is a flat fixed terminal fixed to the bottom of the switch base 10, and is connected to the power source 12.

As shown in FIG. 1, the terminals 5, 6, 7, 8, and 9 protrude outside the switch base 10 to serve as connection terminals 5a, 6a, 7a, 8a, and 9a, respectively, and are connected to each load and power source 12. Connectors 34, 35
This simplifies the connection work.

21 is made of an elastic metal material that is rotatably supported on the outer circumferential surface of the power terminal 1 via an insulating sleeve 22 as an insulating member and is opposed to the plurality of flat fixed terminals 5, 6, 7, 8, and 9. This is the second movable contact. This second movable contact 21 is a fixed terminal 9
in constant contact with the other fixed terminals 5, 6,
7 and 8 have a plurality of contacts 21a that come into contact and separate as the second movable contactor 21 rotates. The insulating sleeve 22 has a stepped cylindrical shape and is tightly fitted and fixed to the power supply terminal 1, and an opening 21b provided at the center of the second movable contact 21 is inserted into the stepped small diameter portion. There is. Furthermore, this insulation sleeve 2
2 may be formed integrally with the switch base 10.

Reference numeral 23 is engaged with the second movable contact 21 from the side of the plurality of anti-flat plate-shaped fixed terminals 5, 6, 7, 8, 9, and connects the second movable contact 21 and the first movable contact 17. It is a connecting member made of an insulating material that connects the first movable contact 17 to the second movable contact 2.
1. This connecting member 2
In order to support the second movable contact 21 in the small diameter part of the insulating sleeve 22, as shown in FIG. There is. Further, a plurality of small protrusions 23 are provided near the outer periphery of one end surface of the connecting member 23.
Each small hole 2 provided in the second movable contact 21 with c
1c, and the other end face is provided with an engagement groove 23a in which the bottom 17a of the first movable contact 17 engages. Therefore, this connecting member 23 connects the first and second movable contacts 17, 21.
are connected and fixed to each other in the circumferential direction, and rotation of the first movable contact 17 is transmitted to the second movable contact 21.

The second movable contact 21 and the connecting member 23 are prevented from coming off in the axial direction with respect to the power terminal 1 by forming it near the tip of the power terminal 1 before the first movable contact 17 is engaged with the connecting member 23. This is done by fitting a retaining ring 25 as a retaining member into the circumferential groove 1c from the engaging groove 23a side via a washer 24. At this time, the second movable contactor 21 is elastically deformed, and each contact point 21a is brought into pressure contact with the opposing flat plate-shaped fixed terminal 5, 6, 7, 8, 9 with an appropriate contact pressure.

26 is a rotor made of an insulating material that is engaged with a cylinder 28 that rotates together with the rotation operation of the key 27, and its rotation axis 26a is slightly wider than the opening 17d provided in the bottom 17a of the first movable contact 17. It has a small diameter, passes through the opening 17d, and is pivotally supported in the hole 1b of the power supply terminal 1. On the rotor 26, as shown in FIG.
concave grooves 26b, 26b, which engage with b, 17b, respectively;
26b is provided to transmit rotation of the rotor 26 to the first movable contact 17. Also, rotor 2
Coil springs 29 as resilient members are accommodated in the holes 26c and 26c provided in the holes 26c and 26c, respectively, and the resilient force of each coil spring 29 presses the steel balls 30 and 30 against the case 31.
The operation position of the key 27 shown in Fig. 4A is OFF,
A plurality of tapered recesses 31 are provided at corresponding positions of the case 31 in order to maintain the rotor 26 at each position even if the key 27 is released when the key 27 is at the position shown in FIG.
A is provided so that the steel ball 30 is engaged. Also, when the key 27 is in the and position, when you release your hand from the key 27, the rotor 26
A stopper 31b is provided on the case 31 so that the torque spring 32 wound around the casing 31 automatically returns to the respective positions. (See FIGS. 2 and 5) 33 is a contact spring as a resilient member wound around the rotating shaft 26a, and the bottom 17a of the first movable contact 17 is always connected to the tip end surface 1a of the power terminal 1. This is for pressure welding with appropriate contact pressure.
Incidentally, the switch base 10 and the case 31 are fixed with screws 36.

By rotating the key 27, the cylinder 2
8, the rotor 26 rotates, and each rising piece 17 engages with a plurality of grooves 26b of the rotor 26.
b allows the first movable contact 17 to rotate at the same time, and the second movable contact 21 also rotates in conjunction with the first movable contact 17 by the connecting member 23 .

According to this embodiment, a plurality of flat plate-shaped terminals are fixed at appropriate intervals on the bottom surface of a switch base 10, which has a fixed power supply terminal 1 and a plurality of fixed terminals 2, 3, and 4 protruding from each other in the axial direction. Fixed terminals 5, 6,
The second movable contactor 21 facing 7, 8, 9,
The second movable contact 2 is rotatably supported on the outer peripheral surface of the power supply terminal 1 via an insulating member 22.
1 to the plurality of fixed terminals 2,
3 and 4, each actuator 1
A switch mechanism having multiple functions for operating 9, 20, accessory 18, etc. can be formed in a small size.

Further, a second movable contact 21 is rotatably supported on the outer peripheral surface of the power terminal 1 via an insulating member 22.
The connecting member 23 is prevented from coming off in the axial direction with respect to the power terminal 1 by fitting the retaining member 25 into the circumferential groove 1c formed near the tip of the power terminal 1, so that the second movable contact 21 each contact 2
The contact pressure between 1a and each of the flat fixed terminals 5, 6, 7, 8, 9 is independent without being influenced by the contact spring 33 and coil spring 29 as the elastic members, and the contact pressure can be adjusted appropriately. This makes it easy to set the value to a suitable value. Furthermore, since the contact pressure can be checked at the stage when the retaining member 25 is fitted into the circumferential groove 1c, the contact pressure can only be checked after all the parts constituting the switch mechanism with multiple functions are assembled. The adjustment work of the contact pressure can be performed more easily than the conventional one, and the assembling workability is improved.

Furthermore, since the second movable contactor 21 is made of an elastic metal material, when each contact 21a of the contactor 21 is pressed against each of the flat fixed terminals 5, 6, 7, 8, and 9, each contact 21a comes into contact with the corresponding fixed terminal with approximately uniform pressure, thereby achieving a good contact state, thereby extending the life of each contact 21a, and minimizing the increase in the operating force required to operate the key 27, without deteriorating operability.

Next, the operation of the starting switch device will be explained.

When the key 27 is in the OFF position as shown in FIG. 4A, the fixed terminal 9 connected to the power source 12 is electrically connected to the fixed terminal 7 via the second movable contact 21, as shown in FIGS. 3 and 4B. The engine automatic stop actuator 20 is supplied with power and closes an intake shutter (not shown). When the key 27 is moved to the position by turning the key 27, the fixed terminal 9 is electrically connected to the fixed terminal 5 via the second movable contact 21, and the accessory 18 such as a radio becomes ready for power supply, and the key 27 is moved to the position. Then, the fixed terminal 9 is electrically connected to the fixed terminal 8, the coil 11a of the battery relay 11 is excited, and the contact 11b is closed, and the contact piece 17c of the first movable contact 17 comes into contact with the fixed terminal 4, and the power terminal 1 is electrically connected to the fixed terminal 4 via the first movable contact 17, the electric heating plug 14 is supplied with power via the resistor 15, and the engine (not shown) is preheated.
After that, when the key 27 is released, the key 27 automatically returns to the position shown in FIG.

Next, when the key 27 is operated to the position, the fixed terminal 9 is electrically connected to the fixed terminals 5, 6, and 8 through the second movable contact 21, and the accessory 18 such as a radio is connected to the fixed terminal 9.
becomes ready for power supply, the engine starting actuator 19 is supplied with power and opens the intake shutter, and the coil 11a is energized to close the contact 11.
b is closed. When the key 27 is operated to the position, the fixed terminal 9 maintains conduction with the fixed terminals 6 and 8, so the engine starting actuator 19 maintains the power supply state, and the contact 11b also maintains the closed state and makes contact. Since the pieces 17c and 17c' are in contact with the fixed terminals 2 and 3, respectively, the power terminal 1 is electrically connected to the fixed terminals 2 and 3 via the first movable contact 17, and the electric heating plug 14 is supplied with power, and the starting motor 13 When the key 27 is activated and the key 27 is released, the key 27 automatically returns to the position and becomes ready for driving.

As described above, according to the starting switch device of the present invention, the fixed power supply terminal and the first movable contact can be brought into contact with each other.
A second movable contact facing a plurality of flat fixed terminals fixed to the bottom surface of the switch base is provided with a plurality of spaced apart fixed terminals respectively protruding in the axial direction, and an insulating member is attached to the outer peripheral surface of the power supply terminal. Since the second movable contact is rotatably supported through the first movable contact and rotated by the first movable contact by the connecting member, it is possible to form a compact switch mechanism with multiple functions. .

Further, since the second movable contact and the connecting member that engages with the second movable contact are prevented from coming off in the axial direction with respect to the power supply terminal by the retaining member,
The contact pressure between each contact point of the second movable contact and each flat fixed terminal becomes independent without being influenced by the resilient member, and the contact pressure can be easily set. Furthermore,
Since the contact pressure can be checked at the stage when the retaining member is fitted into the circumferential groove of the power terminal, it is possible to check the contact pressure only after assembling all the parts that make up the switch mechanism with multiple functions. The contact pressure can be adjusted more easily than the conventional method, and the workability of assembling is improved.

In addition, since the second movable contact is made of an elastic metal material, each contact of the second movable contact can be brought into contact with each of the flat fixed terminals with approximately equal pressure, and a good contact state is achieved, so that each contact In addition to extending the service life of the keys, it is possible to suppress the increase in key operating force as much as possible, which has the effect of maintaining good operability.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the starting switch device according to the present invention, in which FIG. 1 is a left side view, and FIG.
The figure is a sectional view taken along the line A-A in Figure 1, and Figure 3 is an electrical wiring diagram showing the state in which the key is in the OFF position.
C is a sectional view taken along the line B-B, C-C, and D-D in FIG. 2, and FIG. Figure B is a connection diagram showing the connection state of each fixed terminal at each operating position of the key, and Figure 5 is an exploded perspective view showing the main parts. 1... Cylindrical or cylindrical fixed power terminal, 1
a... Tip surface, 1c... Peripheral groove, 2, 3, 4... Fixed terminal, 5, 6, 7, 8, 9... Flat fixed terminal, 10... Switch base, 17... First movable contact, 21... second movable contact, 22...
Insulating member, 23... Connecting member, 25... Retaining member, 26... Rotor, 27... Key, 33...
Resilient member.

Claims (1)

[Scope of utility model registration request] A cylindrical or cylindrical fixed power supply terminal protruding axially from the center of the switch base, and a plurality of fixed terminals protruding axially from near the outer periphery of the base at appropriate intervals in the circumferential direction. and a first movable contact that is rotated by a rotor that rotates when a key is rotated and contacts and separates from the plurality of fixed terminals depending on the operating position of the key. , a plurality of flat fixed terminals fixed to the bottom surface of the switch base at appropriate intervals, and a plurality of flat fixed terminals rotatably supported on the outer peripheral surface of the power supply terminal via an insulating member. a second movable contact made of an elastic metal material facing the second movable contact and engaged with the second movable contact from the side of the plurality of anti-flat fixed terminals; A connecting member made of an insulating material that connects the movable contact and the second movable contact fits into a circumferential groove formed near the tip of the power terminal to prevent the connecting member and the second movable contact from coming off in the axial direction with respect to the power terminal. 1. A starting switch device comprising: a retaining member for preventing the first movable contact from coming off; and a resilient member for always pressing the first movable contact against the tip end surface of the power supply terminal with an appropriate contact pressure.