JP3201294B2 - Breaker device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a breaker device capable of holding an operation portion for switching a conduction state between a pair of electrodes in a predetermined state.

[0002]

2. Description of the Related Art As a conventional breaker device of this type, a case is provided with a switch operating portion for switching on and off between a pair of electrodes, and a lock mechanism is provided between the switch operating portion and the case to provide an ON state. In some cases, the switch operation unit is locked in the same manner between when the switch is off and when the switch is off, and each state is maintained.

[0003]

However, as described below, it may be desirable for the breaker device to have a different lock holding force between the ON state and the OFF state depending on the use situation.

For example, in an electric vehicle in which a breaker device for switching a main power supply is provided in a trunk, a lock holding force in an ON state is increased in order to prevent an erroneous operation due to abutment of running luggage or the like. On the other hand, it is desired that the lock holding force in the OFF state is made lower than the lock holding force in the ON state so that the repair and inspection work can be performed efficiently. In the case where the breaker device is covered with a cover to prevent erroneous operation due to contact with luggage, it is necessary to reduce the lock holding force in the ON state in order to easily release the lock with the cover removed. Desirably, on the other hand, it is necessary to prevent erroneous operation due to contact with a tool or the like by making the lock holding force in the off state higher than the lock holding force in the on state.

[0005] The present invention has been made in view of the above circumstances, and has two aspects of reliability of the engagement of the operation unit and operability of the disengagement.
It is an object of the present invention to provide an entire breaker device in which the required performance is higher in the ON state and the OFF state.

[0006]

[Means for Solving the Problems]

<Invention of claim 1> The invention according to claim 1 is provided with an operation unit which can be switched between an ON state in which a pair of electrodes are electrically connected and an OFF state in which the pair of electrodes are not electrically connected, and the operation unit is in an ON state. In addition to providing an on-engagement portion for holding in the off state, and an off-engagement portion that engages with each other in the off state to maintain the state, the holding strength of the on-engagement portion and the holding strength of the off-engagement portion are reduced. It is characterized by being different.

According to a second aspect of the present invention, in the breaker device according to the first aspect, the operation portion disengages the engagement of the ON engagement portion and the engagement of the OFF engagement portion. The on-off portion and the off-engagement portion having a higher holding strength are provided on condition that the disengagement operation portion is operated to release the engagement and the holding strength is lower. Is characterized in that the engagement is released without requiring the operation of the engagement release operation section.

[0008]

Effect of the Invention

<Invention of claim 1> According to the configuration of claim 1, in order to release the engagement between the on-engagement portion and the off-engagement portion, a release operation according to each holding strength is required. Therefore, the one with the higher holding strength of the on-engagement portion and the off-engagement portion is less likely to be disengaged, and has higher reliability. On the other hand, when the holding strength is low, the engagement is easily released and the operability is excellent.

<Invention of Claim 2> In the structure of Claim 2,
The higher the holding strength, the condition of the operation of the disengagement operation unit for the disengagement, so that the reliability can be further increased as compared with the lower holding strength, and the lower the holding strength, Since the engagement can be released without requiring the operation of the engagement release operation section, the operability can be further improved as compared with the one having a higher holding force.

[0010]

According to the above-mentioned invention, of the two performances, namely, the reliability of the engagement of the operating portion and the operability of the disengagement, the performance more required in the ON state and the OFF state. , The reliability and operability of the entire breaker device can be improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a breaker device according to the present invention will be described below with reference to FIGS. The breaker device 10 according to the present embodiment is provided for opening and closing a main power supply circuit that connects a battery and various electric devices in an electric vehicle, and rotates the electrode unit 40 housed in a synthetic resin case 20 by turning the lever 30. It can be moved away by moving operation.

The case 20 has a rectangular parallelepiped case body 21 having an open upper surface and a panel 2 so as to cover the open upper surface.
2 (see FIG. 1), and is fixed, for example, vertically in the trunk of the electric vehicle via mounting legs 23 (see FIG. 3) provided at the four corners of the case body 21.
The inside of the case main body 21 is divided into three chambers by two partition walls 24 (see FIG. 3), and an electrode unit 40 is arranged at the center thereof.

As shown in FIGS. 1 and 2, the electrode unit 40 includes a pair of fixed electrodes 42 and 43 and a movable electrode 44 slidably fitted on the outer periphery thereof. Each of the fixed electrodes 42 and 43 is formed in a round bar shape, and one fixed electrode 42 has a longer overall length than the other fixed electrode 43. Attachment holes 42A, 43A are formed at the centers of the opposed end surfaces of the fixed electrodes 42, 43, respectively.
Both ends of a non-conductive connecting rod 45 made of a synthetic resin are press-fitted therein and are integrated on the same axis in an insulated state having a predetermined dimension. Then, both fixed electrodes 42, 43
Are bolted to a nut 26 insert-molded in the case body 21 together with a connection terminal 25 connected to the battery-side cable and the electric device-side cable.

One movable electrode 44 is connected to both fixed electrodes 42 and 4.
3 and has a structure in which a louver contact (not shown) is mounted on the inner peripheral surface thereof. This movable electrode 4
A connecting body 48 made of a synthetic resin is attached to the outer periphery of 4 by a retaining ring 44A, and is connected to the lever 30 by a connecting shaft 49 (see FIG. 3) protruding from the connecting body 48.

The lever 30 is formed of a synthetic resin, and has a gate shape as a whole with a handle portion 32 extending between upper end portions of a pair of arm pieces 31. This lever 30
The tip of the arm piece 31 is inserted into the outer space 24A of the partition wall 24 of the case main body 21 (see FIG. 3) so as to straddle the above-described electrode unit 40, and the rotating shaft 33 (see FIG. Reference)). In the middle of the arm piece 31, a long hole 30 is provided.
A (see FIG. 4) is formed, and the movable electrode 4
The four connecting shafts 49 are fitted so that the turning operation of the lever 30 can be converted into the sliding movement of the movable electrode 44. Thereby, when the lever 30 is positioned at the right rotation end in FIG. 1, as shown in FIG.
When the lever 30 is positioned at the left rotation end of the figure, the movable electrode 44 is fixed to the fixed electrode 42, 43, as shown in FIG. Conduction is made between the two fixed electrodes 42 and 43 over the area between the electrodes 42 and 43, and the electrodes are turned on. Each arm piece 3 of the lever 30
Side walls 39 (refer to FIG. 4) are formed on both side edges of the shaft 1 so as to rise outward. One end of a torsion coil spring 50 fitted to the rotating shaft 33 is engaged with the side walls,
To the non-conducting state.

The lever 30 has an elongated hole 35 extending from the middle to the upper end of the arm piece 31. As shown in FIG. 5, the handle portion 32 has an inverted U-shaped cross section, and its inner peripheral surface is continuous with the inner peripheral surface at the upper end of the elongated hole 35. The arm 30 is attached to the lever 30.
A slider 60 described below is slidably supported in the long holes 35, 35 so as to bridge between them. As shown in FIG. 5, the slider 60 is connected to a pair of opposing pieces 61, which slide in each of the long holes 35, between upper ends of the pair of opposing pieces 61 by members extending laterally, and is formed in a gate shape as a whole. This lateral portion is the disengagement operation section 6 according to the present invention.
It is 2. Further, on both sides of the disengagement operation section 62, a spring mounting portion 64A is formed by projecting a metal rod insert-molded therein to the side, and one end of the tension coil spring 51 is mounted here. I have. The other end of the tension coil spring 51 is connected to the arm piece 31.
The slider 60 is urged in a direction toward the center of rotation of the lever 30 by being attached to a spring fixing portion 52 protruding from an intermediate portion of the outer surface of the lever 30. Further, the movement of the slider 60 to the side is restricted by the inner wall of the case 20, and
5 does not come off to the side. Further, the slider 60 is provided with a metal lock bar 63 so as to bridge between the lower ends of the opposing pieces 61, 61, and the lock bar 63 is located outside the panel 22 of the case 20. , Is displaced along the panel 22 with the turning operation of the lever 30.

On the panel 22, when the lever 30 is positioned at the left and right pivotal ends in FIG. 1, an on-locking portion 70 and an off-locking portion 75 that can engage with the lock bar 63 are provided. Is formed. The off-locking portion 75 constitutes an “off-engaging portion” according to the present invention together with the lock bar 63, and
Bottom wall 76 formed by depressing near the right end of
And a rising wall portion 77.
The lock rod 63 is urged against the tension coil spring 51 and pressed against the corner formed by the lock rod 63 to lock the lever 30 so as not to rotate freely. In addition, the rising wall 77
As shown in FIG. 6, since the lever 30 is not orthogonal to the moving direction of the lock rod 63 (the direction of the arrow in FIG. 6) accompanying the rotation of the lever 30, when the lever 30 is to be rotated with a predetermined force or more, The lock bar 63 can move upwardly of the lever 30 against the tension coil spring 51 while slidingly contacting the rising wall portion 77, and thus climb over the rising wall portion 77,
The lock in the off state is released. The lock can be released also by a lifting operation of the disengagement operation section 62 described later.

On the other hand, the on-locking portion 70 constitutes an "on-engaging portion" according to the present invention together with the lock bar 63, and is formed by depressing a portion near the left end of the panel 22, as shown in FIG. A bottom wall portion 71 and a rising wall portion 72 are provided, and a recessed portion 73 having a semicircular cross section corresponding to the lock rod 63 is formed in the rising wall portion 72. The lock bar 63 includes the tension coil spring 51 and the torsion coil spring 5.
The lever 30 is urged to zero and pressed into the recess 73 so that the lever 30 is held so as not to rotate freely. Further, as shown in FIG. 8, the recess 73 is overhanging so that the lock bar 63 cannot move upward of the lever 30, so that the lever 30 is rotated by a predetermined force or more. Also, the lock rod 63 is
Cannot be overcome, and the lock in the ON state is not released. That is, there is a difference in the lock holding force between the ON locking portion 70 and the OFF locking portion 75.

The lock between the ON locking portion 70 and the lock bar 63 is released by pulling up the slider 60, and the operation is performed by the above-described engagement releasing operation portion 62. This disengagement operation section 62
As shown in FIG. 1 and FIG.
The handle portion 32 is covered with the handle portion 32, and the lower end portion of the disengagement operation portion 62 always projects from the open portion of the handle portion 32. When releasing the lock, the lever 30 is used to remove the lock rod 63 from the recess 73.
2 is slightly rotated counterclockwise in FIG. 2 to pull the disengagement operating portion 62 toward the handle portion 32 against the coil spring 51, move the slider 60 above the lever 30, and the lock bar 63 raises the wall portion 72. Make sure you can get over it.

A lock rod 6 is provided between the locking portions 70 and 75.
A depression 74 is formed at a position corresponding to the displacement locus of No. 3, and the left and right sides of the depression 74 are gently connected to the upper end flat portions 70 </ b> A and 75 </ b> A of the locking portions 70 and 75.

Next, the operation of the present embodiment will be described.
First, the case where the breaker device 10 is in the ON state will be described. In the ON state, as shown in FIG.
Are engaged with the ON engagement portion 70. More specifically, the lock rod 63 is biased by the two coil springs 50 and 51 to
The lock 73 is fitted in the recess 73, and the recess 73 is overhanging on the side over the rising wall 72 of the lock rod 63.

Here, consider the case where the breaker device 10 is subjected to vibration or the luggage in the trunk abuts on the lever 30 while the electric vehicle is running. First, regarding the vibration, the lock rod 63 is moved into the recess 73 by the two coil springs 5.
Since they are biased to 0 and 51, they do not move due to vibration or the like. Further, regarding the contact of the load or the like, even if a force for rotating the lever 30 is applied by the contact, the lock bar 63 is received by the recess 73 and cannot move to the side over the rising wall portion 72, The lever 30 is not rotated.

In order to intentionally switch from the ON state to the OFF state, the following is performed. First, the breaker device 10
And put a finger on the handle portion 32 from the front.
2. Turn the hooked finger to the back of the handle portion 32 and rotate the lever 30 in the counterclockwise direction in FIG.
Raise 2. Then, the lock bar 63 is disengaged from the recess 73, and the lock bar 63 can be moved above the rising wall portion 72. When the lever 30 is rotated in the clockwise direction in FIG. 2 in this state, the lock bar 63 rises over the wall portion 72 and is turned off when reaching the rotation end. As described above, the unlocking operation is performed by pulling up the disengagement operation unit 62. Since the engagement disengagement operation unit 62 is protected from abutment of a load or the like by the handle unit 32, careless locking may be performed. The lock is not released, and the lock in the ON state is highly reliable.

Next, the case where the breaker device 10 is in the off state will be described. In the off state, as shown in FIG. 1, the lock bar 63 is engaged with the off engaging portion 75. To switch from the off state to the on state, put a finger on the lever 30 and turn it counterclockwise in FIG. Then, the lock bar 63 is pressed obliquely toward the rising wall 77 as shown by the arrow in FIG. If the force for rotating the lever 30 is equal to or larger than a predetermined magnitude, the lock bar 63 moves upward along the rising wall portion 77 against the tension coil spring 51,
The lock is released by climbing over the rising wall portion 77. If you rotate the lever 30 in the same direction,
Switches to the ON state.

As described above, the lock in the off state does not require the operation of the disengagement operation section 62 unlike the lock in the on state, so that the operability is excellent. As a result, the switching operation from the off state to the on state can be performed by one action of turning the lever 30 in the counterclockwise direction in FIG. 1, thereby improving workability. Thus, the breaker device 10 of the present embodiment
In the breaker device 10 as a whole, by increasing the required performance in the ON state and the OFF state among the two performances of the reliability of the locking of the lever 30 and the operability of the unlocking, Reliability and operability can be improved.

When the breaker device 10 is turned off, for example, when a tool or the like accidentally hits the lever 30 during repair or inspection work of an electric vehicle, the contact between the tool and the like is considered. Is an instantaneous force, unlike a continuous force that causes the operator to rotate the lever 30, so that the lock rod 63 does not come up over the wall portion 77, and the force is Since the lock is not released unless it coincides with the direction in which is rotated, this lock is not released. Therefore, the reliability in the off state is ensured within a necessary range.

<Other Embodiments> The present invention is not limited to the above embodiments. For example, the following embodiments are also included in the technical scope of the present invention.
In addition to the following, various changes can be made without departing from the scope of the invention.

(1) In the present embodiment, the operability of the lock release and the reliability of the lock in the ON state and the OFF state are required depending on whether the operation of the disengagement operation section 62 is required for the release of the lock. However, the operation of the disengagement operation unit 62 is not a condition, and for example, the rising wall 7
The difference between the heights of the operability and reliability may be increased by providing a difference between the heights 2 and 77, for example.

(2) In the present embodiment, the reliability of the lock is enhanced in the ON state, and the operability of unlocking is enhanced in the OFF state. However, the opposite configuration may be adopted if necessary.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an off state of a breaker device according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the on state.

FIG. 3 is a front sectional view of the breaker device;

FIG. 4 is a side sectional view showing an arm mounting space.

FIG. 5 is a perspective view showing an operation unit of a lever.

FIG. 6 is an enlarged sectional view of an off-locking portion.

FIG. 7 is an enlarged cross-sectional view of an ON locking portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Breaker apparatus 20 ... Case 30 ... Lever (operation part) 42 ... Fixed electrode (a pair of electrodes) 43 ... Fixed electrode (a pair of electrodes) 50 ... Coil spring 51 ... Coil spring 62 ... Disengagement operation part 63 ... Lock rod ( ON engagement part, OFF engagement part) 70 ON locking part (ON engagement part) 75 OFF locking part (OFF engagement part)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 9/00-9/28 H01H 21/00

Claims (2)

(57) [Claims] 1. An on-state in which a pair of electrodes are conducted,
An operating portion that can be switched between an off state and a non-conductive state, an on-engagement portion for holding the operating portion in the on state, and engaging with each other in the off state to hold the state; A breaker device comprising: an off-engagement portion; and a holding strength of the on-engagement portion and a holding strength of the off-engagement portion are different. 2. The on-engagement section and the off-engagement section, wherein the operation section includes an engagement release operation section for releasing the engagement of the on-engagement section and the engagement of the off-engagement section. Of the parts, the one with the higher holding strength is conditioned on the operation of the disengagement operation part for the disengagement, and the one with the lower holding strength does not require the operation of the disengagement operation part and the engagement is not required. 3. The breaker device according to claim 1, wherein the breaker is set to be released.