JP3387346B2 - 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 which is used, for example, in a power supply circuit of an electric vehicle.

[0002]

2. Description of the Related Art Conventionally, as a breaker device of this type, a lever-type movable electrode is rotatably supported on one of a pair of fixed electrodes provided on a substrate so as to be spaced from each other, and the movable electrode is in a standing posture. It was tilted from and it was made to be conductive by inserting it into the elastic clamping piece formed on the other fixed electrode,
A so-called knife switch type was used. However, in the knife switch type, the conduction path is exposed, which is not necessarily preferable in consideration of safety. Therefore, by fitting the pair of fixed electrodes so as to cover the movable electrode with only the contact portion exposed, the two fixed electrodes are brought into conduction, and by removing the movable electrode from the fixed electrodes, the space between the fixed electrodes is fixed. It is conceivable to cut off the conduction. In this case, by attaching a handle to the movable electrode to improve grip, it is possible to improve operability at the time of fitting / disengaging.

[0003]

In the structure in which the handle is provided as described above, for example, the O attached to the movable electrode is used.
If the operating resistance at the time of mating / uncoupling becomes large due to the ring, it may not be possible to expect improvement in operability simply by improving the grip performance. Means are desired. The present invention has been completed based on the above circumstances, and in the case of adopting a structure in which a movable electrode that can be fitted into and removed from a fixed electrode is used and a handle is provided on the movable electrode,
The purpose is to improve the operability of fitting and disengaging with the handle.

[0004]

According to a first aspect of the present invention, a pair of fixed electrodes provided in a casing and a pair of fixed electrodes are connected to each other by connecting and disconnecting the fixed electrodes. A movable electrode to be cut, a handle rotatably provided on the movable electrode by a shaft support means, and a handle formed by projecting an operating portion and an engaging portion to opposite sides from a rotation center thereof;
A handle is provided on the protruding side of the operation portion with respect to the rotation center.
A sliding means that allows bidirectional displacement with the protruding side of the engaging portion, and a handle that is provided so as to stand up from the outer surface of the casing and that has the handle displaced to the protruding side of the engaging portion. The handle is provided so as to overlap the outer surface of the casing and a fitting receiving portion that exerts a lever action that pushes the movable electrode in the fitting direction by engaging with the engaging portion when rotating. And a receiving portion for detachment that exerts a lever action of pushing the movable electrode in the detaching direction by engaging with the engaging portion when the operating portion is rotated in a state of being displaced toward the projecting side. It is characterized by

According to a second aspect of the present invention, in the first aspect of the present invention, the shaft support means and the slide means engage the rotation center shaft provided in the movable electrode with the elongated hole formed in the handle. It is characterized by being a common structure by.

[0006]

[Operation and effect of the invention]

<Claim 1> When the movable electrode is engaged / disengaged, the force applied to the operating portion is amplified by the lever action with the engaging receiver or the detaching receiver as a fulcrum, and the engaging / disengaging force is applied to the movable electrode. Therefore, the movable electrode can be easily fitted and removed with a small operation force. Further, when considering the moment with the center of rotation as the fulcrum, the length of the arm from the fitting receiving portion to the center of rotation becomes long due to the handle being displaced toward the engaging portion during fitting. Therefore, the stress generated in the fitting receiving portion may be small, but this is suitable for the fitting receiving portion whose strength tends to be relatively low because it rises from the casing. On the other hand, with respect to the moment at the time of disengagement, contrary to the moment at the time of fitting, since the arm from the disengagement receiving part to the center of rotation is short, the stress generated in the disengagement receiving part becomes large. Since it is provided so as to overlap the outer surface of, it can withstand a large stress. As described above, according to the present invention, in addition to improving the operability by providing the handle to enhance the grip performance, the lever is used to amplify the operation force to fit the movable electrode. -Since it acts as a disengagement force, the fitting and dismounting operations can be easily performed even when the operating resistance increases due to the O-ring or the like. Also, the fitting receiving part rising from the casing tends to have lower strength than the separating receiving part provided so as to overlap the casing, but the force acting on the fitting receiving part by displacing the handle is reduced. Since it can be suppressed to a small size, it is not necessary to provide any means for increasing the strength of the fitting receiving portion, and it is possible to downsize the fitting receiving portion.

<Claim 2> When the shaft support means and the slide means are separately structured, the number of parts may increase and the size may increase. However, in the present invention, the rotation center shaft and the elongated hole are provided. Since the shaft support means and the slide means have a common structure by adopting the engaging structure of (1), the number of parts can be reduced and the size can be reduced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 10 indicates a casing made of synthetic resin. The casing 10 includes a lower casing 11 having an open top and a rectangular shape.
It is composed of an upper casing 12 which is covered with an opening of the lower casing 11 and fixed by a screw 13, and a flange 14 provided on an outer periphery of a lower end of the lower casing 11 is screwed to be mounted on a vehicle body (not shown). Has become.

A pair of fixed electrodes 15A and 15B are erected on one side (lower right side in FIG. 1) in the lower casing 11,
The fuse 16 is housed on the other side. Fixed electrode 15
A and 15B are screwed and attached to a pair of female screw bodies 17A and 17B embedded in the bottom surface of the lower casing 11 by insert molding. One fixed electrode 15A (Fig. 1
An electric wire 19 is connected to the lower left side of the) via a terminal fitting 18, and the electric wire 19 is drawn out from the bottom surface of the lower casing 11 to the outside. Further, one end of the bus bar 20 is connected to the other fixed electrode 15B by co-clamping, and the other end of the bus bar 20 is connected to one connecting piece 16 of the fuse 16.
A is connected by a bolt 21. An electric wire 23 is connected to the other connecting piece 16B of the fuse 16 via a terminal fitting 22.
Is connected, and the electric wire 23 is drawn out from the bottom surface of the lower casing 11. A waterproof seal member (not shown) is attached to the outlets of the electric wires 19 and 23 that open to the lower casing 11.

The movable electrode 24 is adapted to be fitted in and disengaged from the pair of fixed electrodes 15A and 15B. The movable electrode 24 includes a pair of louver terminals 25A and 25B that can be externally fitted to the fixed electrodes 15A and 15B.
It is a structure connected by. The movable electrode 24 is provided on the elongated mounting body 27 made of synthetic resin in a state where the louver terminals 25A and 25B are projected from the lower surface by insert molding. Furthermore, both louver terminals 25
An O-ring 28 for waterproofing is attached to the outer periphery of A and 25B.

On the other hand, on the ceiling surface of the upper casing 12, just above the fixed electrodes 15A, 15B, a pair of insertion holes 29 for allowing the insertion of both louver terminals 25A, 25B.
Is opened. A tubular portion 30 that projects toward the inside of the lower casing 11 is formed at the hole edge of the insertion hole 29, and the louver terminal 25 is provided on the inner periphery of the tubular portion 30.
The O-rings 28 of A and 25B are brought into close contact with each other, so that the gap between the louver terminals 25A and 25B and the insertion hole is waterproofed.

Each louver terminal 25A, 25B has an insertion hole 2
9 is fitted into the pair of fixed electrodes 15A and 15B in the casing 10, and the fixed electrodes 15A and 1B are pulled out from the insertion hole 29.
5B, so that a breaker switch that disconnects or connects between the fixed electrodes 15A and 15B is configured. On the upper surface side of the attachment body 27 of the movable electrode 24, a handle 31 for easily performing the inserting / removing operation is provided. A pair of bearing portions 32 are provided at both ends of the upper surface of the mounting body 27 in the longitudinal direction, and each bearing portion 32 has a rotation center axis that is coaxial with the other side. (Some axis support means, slide means)
33 is fixed in a state of protruding from the bearing portion 32 to the outside. The handle 31 includes an operating portion 34 that is parallel to the rotation center shaft 33, and a pair of leg portions 35 that extend from both ends and that correspond to the bearing portion 32 from the outside. Both legs 3
Engaging portions 36 are formed so as to project from the outer surface of the tip of each of the Nos. Further, long holes (axial support means and slide means which are constituent features of the present invention) 37 along the length direction of the leg portions 35 are provided on the outer and inner surfaces of the engaging portions 36 and the tip portions of the leg portions 35. It is formed so as to penetrate so as to open. The rotation center shaft 33 is fitted into each of the long holes 37, and the handle 31 is supported by the movable electrode 24. The handle 31 is capable of relative rotation with respect to the movable electrode 24 about the rotation center shaft 33, and is also capable of relative displacement in the direction along the elongated hole 37. . When the handle 31 is viewed from the side, the distal end of the engaging portion 36 and the operating portion 34 are configured to project in mutually opposite sides about the rotation center shaft 33. When one of the engaging portion 36 and the operating portion 34 is displaced upward, the other is displaced downward. When the handle 31 is displaced along the long hole 37, the rotation center shaft 3
The protruding size of the engaging portion 36 and the protruding size of the operating portion 34 from 3 alternately increase and decrease.

A fitting receiving portion 38 is provided on the upper surface of the upper casing 12 so as to correspond to the pair of engaging portions 36 of the handle 31 when the movable electrode 24 is fitted into and removed from the fixed electrode. The detachment receiving portions 39 are provided by pair by integral molding. The fitting receiving portion 38 is the upper casing 1.
"Inverted L-shape" that is provided so as to stand up from the upper surface of 2
Is doing. The handle 3 when fitting the movable electrode 24
When 1 is rotated in the tilt direction and slid toward the projecting side of the engaging portion 36, the tip of the engaging portion 36 is engaged with the lower surface of the laterally projecting portion of the upper end of the fitting receiving portion 38. The lever is used as a fulcrum. Further, the detaching receiving portion 39 is provided so as to overlap the upper surface of the upper casing 12, and when the handle 31 is slid toward the operating portion 34 and is rotated in the standing direction when the movable electrode 24 is detached, The tip of the joining portion 36 is engaged with the upper surface of the detaching receiving portion 39, and a lever action is exerted with this engaging portion as a fulcrum.

Next, the operation of this embodiment will be described. When fitting the movable electrode 24 to the fixed electrodes 15A and 15B,
The operating portion 34 of the handle 31 is grasped to suspend the movable electrode 24 as shown in FIG. 4, and in this state, both louver terminals 25A and 25B are dropped into the insertion hole 29 by its own weight. Then, the louver terminals 25A and 25B
The louver (not shown) on the inner periphery of the fixed electrode 15
By engaging the upper ends of A and 15B, they stop when they are slightly fitted. After that, the handle 31 is lowered, the upper end of the long hole 37 is brought into contact with the rotation center shaft 33, and the handle 31 is further pushed down. As a result, the louver terminals 25A, 2
5B is fitted into the fixed electrodes 15A and 15B against the frictional resistance while elastically bending the louver. And FIG.
As shown in FIG.
When it comes into contact with the louver terminals 25A, 25, the handle 31 cannot be pushed further down.
B remains in a state in which it is fitted to the fixed electrodes 15A and 15B halfway due to frictional resistance.

Therefore, this time, the handle 31 is rotated in a direction in which the handle 31 tilts around the rotation center shaft 33 (clockwise direction in FIG. 5). Then, the engaging portion 36 is brought into a state of engaging with the fitting receiving portion 38, and hence the handle 31 is further pushed down while pushing the handle 31 toward the engaging portion 36 side. During this time, as shown in FIG. 6, a lever action is exhibited with the engaging portion between the engaging portion 36 and the fitting receiving portion 38 as a fulcrum. Due to this lever action, the pushing-down force applied to the operating portion 34 is amplified and acts as a large fitting force on the movable electrode 24 via the rotation center shaft 33, so that the movable electrode 24 can be easily fixed.
5B is fitted. During the fitting, the fixed electrode 15A,
In addition to the friction between 15B and the louver terminals 25A and 25B, the friction between the O-ring 28 and the inner periphery of the tubular portion 30 causes a large fitting resistance, but the lever action is exerted as described above. The movable electrode 24 can be reliably inserted into the regular fitting position even with a small operating force.

Then, as shown in FIG. 7, the handle 31
When is rotated to a posture parallel to the upper casing 12, the movable electrode 24 is brought into the normal fitting state, and further rotation of the handle 31 is restricted, so that the fitting operation is completed. In this state, the handle 31 is in a state of lying down along the upper surface of the upper casing 12, so that the upward protrusion amount is suppressed to be small and the handle is compact. Further, since the handle 31 slides to the protruding side of the engaging portion 36, that is, the side where the operating portion 34 is retracted, the operating portion 34 does not laterally protrude from the upper casing 12 as shown in FIG. Also in this respect, compactness has been realized. If the casing 10 and the handle 31 are provided with holding means for holding the handle 31 in the state shown in FIGS. 2 and 7, a compact form can be maintained.

On the other hand, when the movable electrode 24 is detached from the fixed electrode, first, as shown in FIG. 8, the handle 31 is slid to the operation portion 34 side while lying down, and then the handle 31 is raised from that state. To rotate. Then, as shown in FIG. 9, the engaging portion 36 is disengaged from the receiving portion 39 for disengagement.
The lever action is achieved with the engaging portion 36 and the receiving portion 39 for disengagement as the fulcrum. This lever action amplifies the force exerted on the operating portion 34 and acts as a large detaching force with respect to the movable electrode 24. Therefore, the movable electrode 24 causes friction between the movable electrode 24 and the fixed electrodes 15A and 15B. O-ring 28 and tube portion 30
It is easily disengaged against the disengagement resistance caused by the friction between and.

Here, the operating force in the lever action will be described. As shown in FIG. 10 (A), the fitting resistance is R,
The length of the arm from the fulcrum of the lever (the engagement position between the fitting receiving portion 38 and the engaging portion 36) to the point of action (the rotation center shaft 33) is X.
k, the length of the arm from the fulcrum to the power point (operation unit 34) is (X
k + Yk), the operating force Pk required for fitting against the fitting resistance R is Pk = R × Xk / (Xk + Yk). Further, as shown in FIG. 10 (B), the disengagement resistance is R like the fitting resistance, and the action point (rotation central axis) from the lever fulcrum (the engagement position between the disengagement receiving portion 39 and the engaging portion 36). Three
The arm length up to 3) is Xr, the fulcrum to the force point (operation unit 3
If the length of the arm up to 4) is (Xr + Yr), the operating force Pr required for the separation against the separation resistance R is Pr = R × Xr / (Xr + Yr). Both (Xk + Yk) and (Xr + Yr) are equal to each other because they have the same length as the entire length of the handle 31, and since the handle 31 slides to the operation portion 34 side when detached, Xr <Xk. Therefore, the operating force Pr required at the time of disengagement can be smaller than that at the time of fitting. This is advantageous in improving the operability at the time of disengagement, considering the fact that the handle 31 is pushed down at the time of fitting and relatively force can be applied, whereas the handle 31 is pulled up at the time of disengagement, making it difficult to apply force. I can say.

Next, the fitting receiving portion 38 in the lever action
The force received by the detachment receiving portion 39 will be described. Considering the moment of the force about the rotation center shaft 33, if the force acting on the fitting receiving portion 38 is Fk as shown in FIG. 10A, then Fk = Pk × Yk / Xk = R × It becomes Yk / (Xk + Yk). On the other hand, as shown in FIG. 10B, the force Fr acting on the receiving portion 39 for separation is: Fr = Pr × Yr / Xr = R × Yr / (Xr + Yr) At the time of fitting, Yk <Yr because the handle 31 slides toward the engaging portion 36 side. Therefore, the force Fk acting on the fitting receiving portion 38 is suppressed to be smaller than that of the separating receiving portion 39, and the stress generated in the fitting receiving portion 38 can be small. This is advantageous in view of the fact that a large strength cannot be expected because the fitting receiving portion 38 is provided so as to rise from the upper casing 12. If the strength of the fitting receiving portion 38 is to be increased, it is necessary to increase means such as increasing the thickness of the fitting receiving portion 38, which leads to an increase in size. Since there is no need to do so, miniaturization has been realized. On the other hand, the receiving portion 39 for detachment has the receiving portion 3 for fitting.
Although a force larger than that of the upper casing 12 is applied to the upper casing 12, the detachment receiving portion 39 is provided so as to overlap the upper surface of the upper casing 12.
Will be accepted by Therefore, it is not necessary to take measures for strength such as the fitting receiving portion 38.

As described above, in this embodiment, since the movable electrode 24 is fitted / removed by using the handle 31 having a good gripping property, the fitting / removing operability is excellent. At the same time, handling of the movable electrode 24 after detachment is facilitated. In addition, the handle 31 is inclinable so that the handle 31 can be laid down along the casing 10, so that downsizing is realized. Further, the handle 31 is attached to the upper casing 1 along the long hole 37.
By sliding along the upper surface of No. 2, it can be accommodated within the range of the same surface, so that downsizing is realized also in this respect.

When the retractable handle 31 functions as a lever, the operating force is amplified and applied to the movable electrode 24 as a fitting force / a detaching force. However, it requires only a small amount of operating force and is excellent in operability. Moreover, by making the handle 31 slidable, the length from the fulcrum of the lever (fitting receiving portion 38 or the receiving portion 39 for detachment) to the point of action (rotation center shaft 33) and the force point from the fulcrum (operating portion 34) Since the length up to can be increased / decreased alternately at the time of mating and at the time of disengagement, a relatively small strength mating receptacle can be used at the time of mating, while a small operating force is required for disengaging It is possible to reduce the stress generated in the portion 38. Further, in the present embodiment, the handle 31
Pivoting means for rotating the movable electrode 24 with respect to the movable electrode 24,
The rotation center shaft 3 includes a sliding means for displacing the handle 31 along the protruding direction of the engaging portion 36 and the operating portion 34.
3 and the long hole 37 have a common structure, the number of parts is reduced and the size is reduced as compared with the case where the shaft support means and the slide means are provided separately.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the above, various modifications can be made without departing from the scope of the invention. (1) In the above-described embodiment, the shaft support means for rotating the handle and the slide means for sliding the handle have a common structure using the rotation center shaft and the elongated hole. Alternatively, both means may have independent structures.

(2) In the above-described embodiment, the engaging portion of the handle is provided so as to project in the direction opposite to the operating portion with respect to the rotation center axis. However, according to the present invention, the engaging portion is provided with respect to the operating portion. And may project in an oblique direction. (3) In the above embodiment, the engaging portion, the fitting receiving portion, and the disengaging receiving portion are provided at both end positions in the axial direction of the rotation center shaft. However, according to the present invention, positions other than the both ends, for example, the axial direction. You may provide in a central position etc.

(4) In the above embodiment, the case where the O-ring which is the seal member is attached to the movable electrode has been described, but the present invention is also applied to the case where the seal member is attached to the insertion hole of the lower casing. be able to. (5) In the above embodiment, the movable electrode and the lower casing are O.
Although the waterproof type that is fitted through the ring has been described, the present invention can also be applied to a non-waterproof type that does not have a sealing means such as an O-ring.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view showing a fitted state of movable electrodes.

FIG. 3 is a cross-sectional view showing a fitted state of movable electrodes.

FIG. 4 is a side view showing a state where the movable electrode is detached.

FIG. 5 is a partially cutaway enlarged side view showing the initial state of fitting the movable electrode.

FIG. 6 is a partially cutaway enlarged side view showing a state where the movable electrode is in the middle of fitting.

FIG. 7 is a partially cutaway enlarged side view showing a state in which fitting of movable electrodes is completed.

FIG. 8 is a partially cutaway enlarged side view showing an initial state of detachment of the movable electrode.

FIG. 9 is a partially cutaway enlarged side view showing a state in which the movable electrode is being detached.

FIG. 10 (A) is a schematic view showing a lever action at the time of fitting. (B) Schematic diagram showing the lever action during detachment

[Explanation of symbols]

10 ... Casing 15A, 15B ... Fixed electrode 24 ... Movable electrode 31 ... Handle 33 ... Rotation center shaft (axial support means, slide means) 34 ... Operation unit 36 ... Engagement part 37 ... Long hole (axial support means, slide means) 38 ... Fitting receiving part 39 ... Receiving part for removal

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01H 31/24 H01H 31/02 B60L 3/04

Claims (2)

(57) [Claims] 1. A pair of fixed electrodes provided in a casing, a movable electrode that is engaged with and disengaged from the pair of fixed electrodes to connect and disconnect the two fixed electrodes, and a shaft for the movable electrodes. A handle that is rotatably provided by a supporting means and has an operating portion and an engaging portion that project from the center of rotation to opposite sides, and the handle has a protrusion of the operating portion with respect to the center of rotation.
Side and a sliding means capable of displacing in a bidirectional manner with the protruding side of the engaging portion, and provided so as to stand up from the outer surface of the casing,
A fitting receiver that exerts a lever action of pushing the movable electrode in the fitting direction by engaging with the engaging portion when the handle is rotated in a state in which the handle is displaced to the protruding side of the engaging portion. Part and an outer surface of the casing, and the movable electrode is disengaged by engaging the engaging part when the handle is rotated in a state in which the handle is displaced to the protruding side of the operating part. A breaker device comprising: a receiving portion for releasing a lever action that pushes the lever to the side. 2. The shaft supporting means and the sliding means are
The breaker device according to claim 1, wherein the breaker device has a common structure in which a rotation center shaft provided in the movable electrode and an elongated hole formed in the handle are engaged with each other.