JP2773383B2 - Starter switch - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a starter switch using a driving motor as a power source.

2. Description of the Related Art Conventionally, for example, a starter switch A using an electric motor as a power source is a movable switch provided in a starter circuit for supplying current to a starter motor from a power supply, in contrast to an electromagnetic solenoid type starter switch. The moving speed of the contact is made slow so as to be the same as the pushing speed of the pinion. For this reason, when the movable contact comes into contact with the fixed contact, a strong arc is generated, and the contact life is shortened due to an increase in the contact wear. Moreover, in the worst case, there is a possibility that the movable contact and the fixed contact are welded by the above-mentioned arc.

Therefore, for example, in Japanese Patent Application Laid-Open No. Sho 62-150073, when the movement of the movable contact is temporarily stopped by a stopper and the contact spring load reaches a predetermined load, the stopper is released and the movable contact is movable by the reaction force of the contact spring. A starter switch B for contacting a contact with a fixed contact has been proposed.

[Problems to be Solved by the Invention] However, in this starter switch B, even when the movable contact closes (turns on) the fixed contact, the movable contact and the stopper are in sliding contact with each other. There is a problem that the moving speed of the movable contact to the fixed contact side is reduced due to friction between the movable contact and the wear of the movable contact and the stopper, thereby reducing the reaction force of the contact spring.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a starter switch capable of preventing a welding between a movable contact and a fixed contact by moving the movable contact at a predetermined moving speed when closing the contact.

[Means for Solving the Problems] A starter switch according to the present invention includes two contact portions respectively connected to a power supply and a starter motor, and a conductor disposed adjacent to these two contact portions. A first contact having a plurality of teeth, protrusions or holes, and a first movable contact for controlling the intermittent connection between one of the two contacts and the conductor. 1 movable means, a plurality of teeth, a second connecting portion such as a projection or a hole, a second movable contact for controlling the intermittent connection between the other of the two contact portions and the conductor, and a second movable contact. A second movable means having a pressing means for pressing a movable contact against the other contact portion and the conductor side; and a second movable means connected to the first connecting portion, wherein the first movable contact is provided on the one contact portion and the conductor side. The first member that is displaced in the axial direction A first shifting unit having a connecting portion, a second connected portion connected to the second connecting portion, for shifting the second movable contact in a direction opposite to the other contact portion and the conductor, and a rotation. A second shifting unit having a release unit for releasing the connection between the second connecting unit and the second connected unit when the position in the direction reaches a predetermined position; the first shifting unit and the second shifting unit And a drive motor for shifting the means in the rotation direction.

[Operation] When the drive motor rotates, the first shift means and the second shift means shift in the rotation direction in synchronization with the drive motor.

At this time, since the first connecting part of the first movable means and the first connected part of the first shifting means are connected, the first shifting means changes its position as the position of the first shifting means shifts. The first movable means is displaced in the axial direction by the connected portion. Due to the axial displacement of the first movable means, the first movable contact becomes 2
It shifts toward one of the contact portions and the conductor side.

Further, since the second connecting portion of the second movable means is connected to the second connected portion of the second shifting means, as the position of the second shifting means shifts, the second connected portion of the second shifting means changes. The connecting portion shifts the second movable means in the axial direction. Due to the axial displacement of the second movable means, the second movable contact is displaced toward the other of the two contact portions and the side opposite to the conductor.

When the first shifting means and the second shifting means are further shifted in the rotation direction by further rotating the driving motor, the first movable contact is slowly applied to one of the two contact parts and the conductor. Contact with.

Further, when the position of the second connected portion is shifted to a predetermined position, the connection between the second connected portion and the second connected portion is released by the release portion of the second shifting means. For this reason, the second movable contact is quickly moved to the other contact portion of the two contact portions and the conductor by the pressing force of the pressing means, and is quickly moved to the other contact portion of the second movable contact and the two contact portions and the conductive portion. Contact with the body.

At this time, after the connection between the second connection portion and the second connected portion is released by the release portion, the second movable contact shifts to the fixed contact side, so that the second connection portion and the second connected portion are connected. There is no decrease in the moving speed of the movable contact to the fixed contact due to friction or reduction in the pressing force of the pressing means due to wear of the second connecting portion and the second connected portion.

Therefore, the power supply and the starter motor are electrically connected via the fixed contact, the conductor, the first movable contact, and the second movable contact, and the starter motor is rotated by supplying a current from the power supply to the starter motor.

[Effect of the Invention] It is possible to prevent a decrease in contact life due to an increase in contact wear,
In addition, since the moving speed of the first movable contact and the second movable contact can be prevented from lowering, welding between the movable contact and the fixed contact can be completely prevented.

[Embodiment] A starter switch of the present invention will be described based on an embodiment shown in FIGS.

1 to 7 show a first embodiment of the present invention. 1 to 4 are views showing the overall configuration of a starter switch. FIG. 5 is a diagram showing a first gear, a second gear, and a driving motor.

The starter switch 1 meshes a pinion 12 to which the rotation of the armature 11 of the starter motor is transmitted with the ring gear 13 of the internal combustion engine, and controls the energization of the battery 14 to the armature 11 of the starter motor and the stop of energization. It is. This starter switch 1
The vehicle includes a pinion drive mechanism 2, a fixed contact 3, a first movable means 4, a second movable means 5, a first gear 6, a second gear 7, and a drive motor 8.

The pinion drive mechanism 2 includes a drive spring 21 having one end supported by the first movable means 4,
A drive lever 23 supporting the other end of 21 and rotating about a support shaft 22, a return spring 24 of the drive lever 23
It is composed of The illustrated lower end of the drive lever 23 is connected to a recess 17 of a one-way clutch 16 slidable on the shaft 15 of the armature 11 in the axial direction.

The drive lever 23 advances the pinion 12 integrally formed with the one-way clutch 16 toward the ring gear 13 when the upper end in the figure is pushed rightward in the figure.

The fixed contact 3 is a first contact 3 connected to the battery 14.
1 and a second contact portion 32 connected to the armature 11. A conductor 33 is provided between the first contact portion 31 and the second contact portion 32, and the first contact portion 31, the second contact portion 32, and the conductor 33 are on the same plane. It is located next to it.

The first movable means 4 has a first rod 41, a first movable contact 43, and a contact spring 44.

The first rod 41 supports one end of the drive spring 21 of the pinion drive mechanism 2. At the lower edge of the first rod 41 in the figure, a plurality of teeth 42 are arranged in a row in the axial direction.

The plurality of teeth portions 42 are the first connecting portions of the present invention,
It meshes with the first gear 6 only when the gear 6 rotates in the direction indicated by the arrow.

The first movable contact 43 electrically connects the first contact portion 31 and the conductor 33 when the first movable contact 43 contacts the first contact portion 31 of the fixed contact 3 and the conductor 33.

The contact spring 44 has one end supported by the first rod 41 and the other end supported by the first movable contact 43. The contact spring 44 urges the first movable contact 43 toward the first contact portion 31 and the conductor 33.
When the movable contact 43 comes into contact with the first contact portion 31 and the conductor 33, a contact pressure to the first contact portion 31 and the conductor 33 is applied to the first movable contact 43.

The second movable means 5 has a second rod 51 and a contact spring 54.

The second rod 51 includes a plurality of teeth 52 and a second movable contact 53.
Are integrally formed.

The plurality of teeth 52 are the second connecting portions of the present invention,
The rod 51 is arranged in a row at the upper end edge in the figure in the axial direction. These teeth 52 mesh with the second gear 7 only when the second gear 7 rotates in the direction of the arrow shown in the figure.

The second movable contact 53 electrically connects the second contact portion 32 and the conductor 33 when the second movable contact 53 contacts the second contact portion 32 of the fixed contact 3 and the conductor 33.

The contact spring 54 is a pressing means of the present invention, and has one end supported by the second rod 51 and the other end supported by the second movable contact 53. This contact spring 54
Urges the second movable contact 53 toward the second contact portion 32 and the conductor 33, and the second movable contact 53 is
When the second movable contact 53 comes into contact with the
A contact pressure is applied to the contact portion 32 and the conductor 33.

 FIG. 6 is a view showing the first gear 6.

The first gear 6 is a first shifting means of the present invention, has a plurality of teeth 61 and a ratchet 62, and is driven to rotate by the drive motor 8.

The plurality of tooth portions 61 are the first connected portions of the present invention, and are arranged in a row on the outer periphery of the first gear 6 in the rotation direction. The plurality of teeth 61 are attached to the plurality of teeth 42 of the first rod 41 by the first method.
The gear 6 is engaged only when the gear 6 rotates in the direction shown by the arrow. For this reason, the first gear 6 shifts the first rod 41 rightward in the figure by shifting in the direction of the arrow shown in the figure, and moves the first movable contact 43 toward the first contact portion 31 and the conductor 33 of the fixed contact 3. Displace in the axial direction.

The ratchet 62 is formed on a contact surface of the first gear 6 with the second gear 7.

The second gear 7 is the second shifting means of the present invention,
As shown in the figure, it has a plurality of teeth 71, a ratchet 72, and a release portion 73, and is driven to rotate by the drive motor 8 like the first gear 6. The second gear 7 has a smaller diameter than the first gear 6.

The plurality of teeth portions 71 are the second connected portions of the present invention, and are partially (semicircularly) arranged in a row in the rotation direction of the outer periphery of the second gear 7. The plurality of teeth 71 mesh with the plurality of teeth 52 of the second rod 51 only when the second gear 7 rotates in the direction of the arrow shown in the figure. For this reason, the second gear 7 shifts the second rod 51 to the left in the figure by shifting in the direction of the arrow shown in the figure, and reverses the second movable contact 53 to the second contact portion 32 and the conductor 33 of the fixed contact 3. Displace axially toward the side.

The ratchet 72 is formed on the contact surface of the first gear 6 with the ratchet 62. The ratchet 72 engages with the ratchet 62 when the drive motor 8 rotates in the direction of the arrow in the figure, and idles with the ratchet 62 when the drive motor 8 rotates in the reverse direction.

The release portion 73 is a missing portion of the outer periphery of the second gear 7 where the plurality of teeth 71 are not formed. When the positions of the plurality of tooth portions 71 do not reach the predetermined positions, the release portion 73 releases the engagement between the plurality of tooth portions 52 and the plurality of tooth portions 71 to form the second rod 51 and the second gear 7 together. Break the connection of.

The first gear 6 is provided on the outer periphery of the shaft 81 of the driving motor 8.
Are fixed, and the second gear 7 is disposed rotatably. In the drive motor 8, when the key switch 82 is closed, the shaft 81 rotates in the direction shown by the arrow, and when the key switch 82 is opened, the rotation of the shaft 81 stops.

A coil spring 83 is provided on the outer periphery of the shaft 81. One end of the coil spring 83 is supported by a retainer 84 fixed to the shaft 81, and the other end is supported by a side surface of the second gear 7. Further, the coil spring 83 always presses the ratchet 62 of the first gear 6 and the ratchet 72 of the second gear 7 to bring the first gear 6 and the second gear 7 into contact.

The operation of the starter switch 1 according to the present embodiment will be described with reference to FIGS.

When the key switch 82 is open, as shown in FIG.
Is opened, the second movable contact 53 closes the second contact portion 32 and the conductor 33, and the connection between the armature 11 of the starter motor and the battery 14 is cut off.

When the key switch 82 is closed, the drive motor 8 is energized, and the shaft 81 of the drive motor 8 starts rotating in the direction indicated by the arrow. Then, the first gear 6 also rotates at the same speed as the rotation speed of the shaft 81, and the second gear 7 where the first gear 6 and the ratchets 62 and 72 are in contact also rotates.

Then, the rotation of the first gear 6 causes the first rod 41 in which the plurality of teeth portions 42 and 61 always mesh with each other to move to the first contact portion 31 and the conductor 33 side. At the same time, the rotation of the second gear 7 causes the plurality of teeth portions 52 and 71 to mesh with each other, so that the second rod 51 overcomes the urging force of the contact spring 54 and moves toward the second contact portion 33 and the conductor 33 side. The second contact portion 32 moved in the opposite direction and closed by the second movable contact 53
And the conductor 33 are opened.

When the shaft 81 of the drive motor 8 rotates in the direction of the arrow shown in FIG. 2, the first movable contact connected to the first rod 41 via the contact spring 44 as shown in FIG.
43 moves toward the first contact portion 31 and the conductor 33 at the same speed as the rotation speed of the shaft 81, and the first movable contact 43 closes the first contact portion 31 and the conductor 33. Also, the first rod 41
The drive spring 21 also moves in the same direction by the movement toward the first contact portion 31 and the conductor 33 side, so that the drive lever 23 rotates clockwise about the support shaft 22 in the figure. For this reason,
The one-way clutch 16 is pushed leftward in the figure by the drive lever 23, and the end surface of the pinion 12 and the end surface of the ring gear 13 of the internal combustion engine come into contact with each other. The rotation continues. Therefore, the drive spring 21 and the contact spring
The movement of the first rod 41 toward the first contact portion 31 and the conductor 33 is continued while the first rod 41 is bent.

As the rotation of the shaft 81 continues, as shown in FIG. 3, when the second gear 7 rotates to a missing portion on the outer periphery of the second gear 7, that is, to a rotation position where the release portion 73 is located, the second gear 7 is rotated. The engagement between the plurality of teeth 52 of the rod 51 and the plurality of teeth 71 of the second gear 7 is released. Therefore, as shown in FIG. 4, the second rod 51 moves toward the second contact portion 32 and the conductor 33 while maintaining a considerable moving speed by the reaction force of the contact spring 54, and the second movable contact 53 As a result, the second contact portion 32 and the conductor 33 are closed.

Therefore, the current supplied from the battery 14 flows in the order of the first contact portion 31, the first movable contact 43, the conductor 33, the second movable contact 53, and the second contact portion 32, and the armature of the starter motor
11 rotates. Therefore, the rotation of the armature 11 and the reaction force of the drive spring 21 cause the pinion 12 to rotate the ring gear 13.
And the internal combustion engine is started.

After the release unit 73 releases the connection between the plurality of teeth 52 of the second rod 51 and the plurality of teeth 71 of the second gear 7,
The second movable contact 53 moves quickly to the fixed contact 3 side.
For this reason, the friction of the plurality of teeth 52, 71, the plurality of teeth 52,
The wear of 71 does not reduce the half force of the contact spring 54 or decrease the moving speed of the second movable contact 53 toward the fixed contact 3.

Accordingly, since the moving speed of the second movable contact 53 when the second movable contact 53 contacts the fixed contact 3 is fast, an arc is not generated between the second movable contact 53 and the fixed contact 3. Therefore, it is possible to prevent the contact life from being shortened due to an increase in the contact wear amount, and to weld the first movable contact 43 and the second movable contact 53 to the fixed contact 3, particularly to the second movable contact 53 and the second contact portion.
Welding with the conductor 32 and the conductor 33 can be prevented.

Further, when the key switch 82 is opened when the internal combustion engine is started, the power supply to the drive motor 8 is stopped, so that the drive lever 23 is rotated leftward about the support shaft 22 by the return spring 24 and the one-way clutch 16 To the initial position. At the same time, by moving the first rod 41 in a direction opposite to the first contact portion 31 and the conductor 33 side, the first contact portion 31 and the conductor 33 closed by the first movable contact 43 are quickly opened. . Therefore, the energization of the armature 11 of the starter motor is stopped, and the rotation of the armature 11 stops.

Therefore, in the present embodiment, the first movable contact 43 quickly separates from the first contact portion 31 and the conductor 33 and there is no stopper, so that the movable contact is caught by the stopper as in the conventional device, and the return speed is reduced. Alternatively, a return failure can be prevented.

When the first rod 41 moves in the direction opposite to the first contact portion 31 and the conductor 33 side, the first gear 6 and the shaft 81 of the driving motor 8 rotate in the direction opposite to the direction indicated by the arrow in the drawing. The second gear 7 and ratchets 62 and 72 have a structure in which power can be transmitted in only one direction. For this reason, the plurality of teeth 71 of the second gear 7 and the plurality of teeth 52 of the second rod 51
Do not engage with each other, so that the first rod 51 does not move,
The state where the second contact portion 32 and the conductor 33 are closed by the movable contact 53 is continued.

FIG. 8 shows a second embodiment of the starter switch of the present invention.

A first gear 6 and a second gear 7 are rotatably arranged on the outer periphery of a shaft 85 of the driving motor 8. Ratchets 63, 87 which engage with the contact surface of the first gear 6 and the contact surface of the flange portion 86 of the shaft 85 when the shaft 85 is rotated by the driving motor 8 and idle when the shaft 85 rotates in the reverse direction. Are formed respectively.

As described above, if the power is transmitted to the first gear 6 and the second gear 7 only in the direction in which the shaft 85 rotates by the driving motor 8, the first rod 41 is opened when the key switch 82 is opened. Ratchet 63, even if moves in the opposite direction,
As a result, the first gear 6 and the flange portion 86 of the shaft 85 idle. For this reason, the shaft 85 of the drive motor 8 does not need to be rotated in the reverse direction, so that the first contact portion 31 and the conductor 33 are opened more quickly than in the first embodiment. Therefore, the rotation of the armature 11 stops quickly.

(Modification) In the present embodiment, a plurality of teeth are used as the first connecting portion and the second connecting portion. However, a plurality of protrusions, a plurality of holes, a worm gear, and the like are used as the first connecting portion or the second connecting portion. May be. Further, the first connected portion or the second connected portion can be freely changed as long as the structure is connected to the first connected portion or the second connected portion.

[Brief description of the drawings]

1 to 7 show a first embodiment of the present invention. First
4 are schematic diagrams showing the entire configuration of the starter switch, FIG. 5 is a side view showing a first gear, a second gear and a driving motor, FIG. 6 is a perspective view showing a first gear, FIG. 7
The figure is a perspective view showing the second gear. FIG. 8 shows a second embodiment of the present invention and is a side view showing a first gear, a second gear, and a driving motor. In the drawing, 1 ... starter switch, 3 ... fixed contact, 4 ... first movable means, 5 ... second movable means, 6 ... first gear (first shift means), 7 ... second gear (Second shift means), 8 ...
... Drive motor, 11 ... Armature, 12 ... Pinion, 13 ... Ring gear, 14 ... Battery (power), 31 ...
.., A first contact portion (one contact portion), 32... A second contact portion (the other contact portion), 33... A conductor, 42.
Connection portion), 43 first movable contact, 52 multiple teeth (second connection portion), 53 second movable contact, 54 contact spring (pressing means), 61 multiple teeth Part (first connected part), 71 ... plural teeth parts (second connected part), 73 ... releasing part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F02N 11/00 H01H 3/00 F02N 15/06

Claims (1)

(57) [Claims] 1. (a) two contact portions respectively connected to a power source and a starter motor, and a fixed contact having a conductor disposed adjacent to these two contact portions; and (b) A first movable unit having a first connecting portion such as a plurality of teeth, protrusions or holes, and a first movable contact for controlling the intermittent connection between one of the two contact portions and the conductor; c) a second connecting portion such as a plurality of teeth, projections or holes, a second movable contact for controlling the intermittent connection between the other of the two contact portions and the conductor, and a second movable contact. A second movable means having a pressing means for pressing the other contact portion and the conductor side; and (d) being connected to the first connection portion, the first movable contact is provided on the one contact portion and the conductor side. A first shifting hand having a first connected portion shifted axially toward (E) a second connected portion connected to the second connecting portion for shifting the second movable contact in a direction opposite to the other contact portion and the conductor, and a predetermined position in the rotational direction. A second shifting means having a release portion for releasing the connection between the second connecting portion and the second connected portion when the position has reached a position; and (f) the first shifting device and the second shifting device. A starter switch including a drive motor that shifts in the rotation direction.