JP3583033B2 - Breaker device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a breaker device used to switch a power line connected to a battery or the like of an automobile between a conductive state and a non-conductive state.
[0002]
[Prior art]
Conventionally, as this type of breaker device, one described in Japanese Patent Application Laid-Open No. 9-223439 is known. This breaker device, as shown in FIG. 11, includes two columnar fixed electrodes 2 erected on a breaker body 1, and a pair of fixed electrodes 2, 2 provided on a movable electrode 4. By connecting the cylindrical legs 5 and 5, the electric wire C is switched between a conductive state and a non-conductive state.
[0003]
[Problems to be solved by the invention]
However, since the above-mentioned breaker device has a structure in which two fixed electrodes 2 and 2 are erected separately, it has been difficult to meet the demand for miniaturization. Therefore, in the breaker device under development by the present applicant, as shown in FIG. 12, a pair of fixed electrodes 6, 6 are laid on the front and back of a protruding wall 7 rising from the breaker main body, and are gathered at one place. A gate-shaped movable electrode 8 is mounted on the protruding wall 7 and a pair of leg pieces 8A, 8A provided on the movable electrode 8 are brought into contact with the fixed electrodes 6 and 6, respectively. By doing so, the configuration is such that the state between the fixed electrodes 6 and 6 is switched from the non-conductive state to the conductive state.
[0004]
However, in a configuration in which the fixed electrode 6 is simply laid on the protruding wall 7, there is a possibility that the fixed electrode 6 may be pulled upward due to a frictional force when the movable electrode 8 is pulled out. In order to prevent this, as shown on the right side of FIG. 12, a configuration is conceivable in which a locking projection 9A is provided at the upper end of the projection wall 7 and this is abutted against the upper end of the fixed electrode 6 to prevent it from falling off. However, when the fixed electrode 6 is assembled from the upper end side of the protruding wall 7, the locking projection 9A hinders the assembling. Then, as shown on the left side of FIG. 12, a lance 9B extending downward from the upper end of the protruding wall 7 is provided, and it is considered that the fixed electrode 6 is prevented from coming off with the lance 9B. Each time, the lance 9B is deformed one by one, and the locking of the fixed electrode 6 by the lance 9B becomes unstable.
[0005]
The present invention has been completed based on the above circumstances, and aims to provide a breaker device that can be reduced in size and that can stably hold a fixed electrode to a breaker body. .
[0006]
[Means for Solving the Problems]
The breaker device according to claim 1, further comprising: a pair of plate-shaped fixed electrodes provided on the front and back surfaces of a protruding wall rising upward from the breaker body; and a gate-shaped movable electrode capable of short-circuiting the fixed electrodes. When the protruding wall is crowned, the lower end portions of the pair of leg pieces provided on the movable electrode, in which the interval between them is narrower, come into contact with each fixed electrode, and the state between the two fixed electrodes becomes non-conductive. In the breaker device that can be switched to the conductive state, the projecting wall has a lance extending downward from the upper end of the projecting wall in a cantilever shape and abutting against the distal end surface of the fixed electrode to prevent the fixed electrode from coming off. A lance protection wall is provided next to the lance on the wall, and when the lower end portion of the leg piece passes through the front end side of the protruding wall, the lance protection wall is opened so that the leg piece does not contact the lance. It has features.
[0007]
According to a second aspect of the present invention, in the breaker device according to the first aspect, the lance protection walls are provided as a pair, and the lances are provided as a pair between the two lance protection walls. .
[0008]
Function and effect of the present invention
<Invention of claim 1>
In the configuration of the first aspect, the pair of fixed electrodes are laid on the front and back of the projecting wall and collected at one location, so that the space around both fixed electrodes is shared, and the breaker device can be downsized. Further, since the fixed electrode is prevented from coming off by the lance, there is no possibility that the fixed electrode is pulled upward by the frictional force when the movable electrode is pulled out. In addition, when the fixed electrode is moved from the upper end side of the protruding wall to the base end side and assembled, the lance is pushed and retreated from the moving path of the fixed electrode in the middle, so that the lance is fixed without disturbing the lance. The electrodes can be easily assembled. In addition, when the movable electrode is inserted into and removed from the protruding wall, the lance protection wall provided next to the lance is opened so that the lower end portion of the leg provided on the movable electrode does not contact the lance. Is not deformed when the movable electrode is inserted or removed, and the fixed electrode can be stably held.
[0009]
<Invention of Claim 2>
The lower end portion of the leg provided on the movable electrode is supported at both ends in the width direction by a pair of lance protection walls so as to be reliably prevented from contacting the lance. In addition, the lances are paired and abutted on both sides of the tip of the fixed electrode, so that the lances can be prevented from falling off stably, and compared with a case where one wide lance is provided. Therefore, the deformation reaction force of the lance can be reduced.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
The breaker device according to the present embodiment is provided in the middle of a power line of an electric vehicle, and is used to switch the power line between a conductive state and a non-conductive state.
[0011]
As shown in FIG. 1, a breaker body 10 provided in this breaker device has a pair of long walls 13, 13 extending in parallel along the longitudinal direction of a flat base 11, and one end of each of the long walls 13, 13. Are closed by a short wall 14, while the other end is open. On the open side, the distance between the long walls 13, 13 is increased stepwise to form a plug accommodating portion 15 inside, while the closed side is surrounded by the long walls 13, 13 and the short wall 14. A fuse housing 16 is provided. Further, the plug housing portion 15 and the fuse housing portion 16 are defined by partition walls 17, 17 protruding from both long walls 13, so as to approach each other.
[0012]
As shown in FIG. 4, a protruding wall 18 stands upright from the base 11 at a position of the plug accommodating portion 15 distant from the partition wall 17, and a longitudinal direction of the breaker main body 10 (see FIG. The first and second fixed electrodes 20 and 21 are laid on the front and back surfaces facing the left and right directions.
[0013]
Specifically, a first fixed electrode 20 is arranged on the front side surface of the protruding wall 18 facing the right side in FIG. 4. The first fixed electrode 20 is formed by bending a metal plate into an L shape. It has a structure provided with a barrel portion 20A at the base end, and an electric wire D1 is crimped to the barrel portion 20A. Then, a tip contact portion 20B of the first fixed electrode 20 opposite to the barrel portion 20A protrudes into the plug accommodating portion 15 from the back side of the base portion 11 through the through hole 22, and the front surface of the protruding wall 18. It is laid on the base end side of. Further, a protrusion 23 is formed on the front end side of the front side surface of the protrusion wall 18, and the front end of the first fixed electrode 20 abuts on the lower surface of the protrusion 23.
[0014]
On the other hand, a second fixed electrode 21 is disposed on the rear side surface of the protruding wall 18 facing the left side in FIG. 4. The second fixed electrode 21 is formed by bending a metal plate into a U-shape. One side of the character is bent outward at a right angle, and a bolt through hole 21A is formed at the tip thereof.
[0015]
As shown in FIG. 6, a pair of lances 25, 25 for preventing the second fixed electrode 21 from coming off are provided on the front end side of the rear side surface of the protruding wall 18. The lance is provided with a pair of lance protection walls 26, 26 erected higher than the lance 25 adjacent to the lance 25. The lances 25, 25 have a cantilever shape, rise up from the tip of the protruding wall 18 and extend downward and in parallel. The second fixed electrode 25A is provided on the lower surface of the locking portion 25A provided at the lower end portion. The tips of 21 are butted (see FIG. 4). As shown in FIG. 5, the lances 25, 25 are arranged at an interval from each other, so that the lances 25, 25 abut against both ends of the tip of the second fixed electrode 21 to stably prevent slipping. And the deformation reaction force of the lance can be reduced as compared with the case where one wide lance is provided.
[0016]
The second fixed electrode 21 is pushed into the space between the partition wall 17 and the protruding wall 18 from the U-shaped bottom side, and a bolt B1 described later provided in the fuse accommodating portion 16 is provided in the bolt through hole 21A. It is assembled so as to be inserted.
[0017]
More specifically, when the second fixed electrode 21 is pushed in, the tip contact portion 21B provided on the second fixed electrode 21 moves along the rear surface of the protruding wall 18. At this time, the tip contact portion 21B moves between the two lance protection walls 26, 26 of the projection wall 18, and rides on the lances 25, 25 on the way. If the lances 25, 25 are pushed in this state, the lances 25, 25 are deflected so as to approach the protruding wall 18 and retreat from the moving path of the second fixed electrode 21. Here, since the lances 25 and 25 have a smaller deformation reaction force than the case where one wide lance is provided as described above, the assembling work can be easily performed. Then, when the second fixed electrode 21 is settled in the normal position, the tip contact portion 21B of the second fixed electrode 21 is laid on the base end side of the rear side surface of the protruding wall 18, and the lance 25 is restored. The second fixed electrode 21 is locked in a retaining state.
[0018]
As shown in FIG. 1, a terminal wall 27 stands upright from the base 11 at a position further away from the partition wall 17 than the protruding wall 18 in the plug accommodating portion 15, and is guided by the terminal wall 27 to be described later. The plug 50 is mounted on the tip of the protruding wall 18.
[0019]
At a position further away from the partition wall 17 than the terminal wall 27 in the plug accommodating portion 15, as shown in FIG. One end of a lever 60 provided on the plug 50 is locked.
[0020]
An electric wire holding portion 24 for holding an electric wire D1 extending from the first fixed electrode 20 is provided on the back side (the surface facing downward in FIG. 4) of the base portion 11 corresponding to the plug housing portion 15. As shown in FIG. 5, the electric wire holding portion 24 accommodates the electric wire D1 between a pair of opposing walls 24A, 24A which are opposed to each other from the back surface of the base 11, and approach each other from the opposing walls 24A, 24A. The electric wire D1 is restricted from moving freely downward by a pair of electric wire locking projections 24B, 24B protruding to the side where the electric wire D1 moves. Note that an obliquely downwardly-facing introduction surface is formed in the electric wire locking projection 24 </ b> B, so that the electric wire D <b> 1 can be easily pushed into the inner side of the electric wire holding portion 24.
[0021]
As shown in FIG. 5, a pair of receiving portions 29, 29 are provided in stepped portions of the long walls 13, 13 formed at the boundary between the plug housing portion 15 and the fuse housing portion 16. Has a structure that is open in the longitudinal direction of the breaker main body 10 and has a closed upper surface, in which an end of a lever 60 provided on the plug 50 is housed. One receiving portion 29 communicates with the microswitch housing chamber 30, and a contact 31 </ b> A of the stored microswitch 31 (see FIG. 1) is provided by a lever 60 which protrudes into the receiving portion 29. Can be turned on.
[0022]
Next, the fuse housing 16 will be described. As shown in FIG. 4, a pair of pedestals 16 </ b> C, 16 </ b> C is provided at both ends in the longitudinal direction of the fuse housing 16 so as to protrude from the base 11, and metal bolts B <b> 1, B <b> 2 are provided there. The head portion is embedded and the screw portion is formed by insert molding so that the screw portion stands up. The second fixed electrode 21 is inserted into the bolt B1 near the plug accommodating portion 15, while the terminal fitting 32 is inserted into the other bolt B2.
[0023]
The terminal fitting 32 is formed by bending a metal plate into a crank shape and fixing an electric wire D2 to a barrel portion 32A provided at one end thereof. Then, the electric wire D2 is inserted into the fuse accommodating portion 16 from the back side of the base 11 through the working hole 33 (see FIG. 4), and the bolt B2 is inserted into the bolt through hole 32B provided at the tip of the terminal fitting 32. It is inserted. The electric wire D <b> 2 is pulled outward from the working hole 33 and is held by the electric wire holding portion 24 provided on the back side of the base 11.
[0024]
The electric wire holding portion 34 is shown in FIG. 4 and is formed by connecting lower end edges of a pair of opposed walls 34A, 34A hanging from both edges of the working hole 33 on the back surface of the base portion 11 with a bottom wall 34B. , A structure that covers most of the working hole 33. And, with the ridge 34C protruding upward from the bottom wall 34B, the electric wire D2 is regulated so as not to hang down.
[0025]
As shown in FIG. 1, the fuse 35 accommodated in the fuse accommodating portion 16 is formed by penetrating metal protruding pieces 35A, 35A protruding from both ends of a cylindrical body through round holes 35B, respectively. The bolts B1 and B2 of the fuse accommodating portion 16 are inserted into the bolts B1 and B2, and nuts N and N are tightened from above.
[0026]
The cover 40 shown in FIG. 2 is fitted into the fuse housing 16. The lid body 40 has a pair of long walls 43, 43 extending in parallel along the longitudinal direction on the lower surface of a ceiling wall 41 formed to be elongated corresponding to the fuse accommodating section 16, and one end side of the long walls 43, 43. It is connected by a short wall 44, while the other end is open. A strip-shaped vertical wall 45 is hung from the ceiling wall 41 on the open end side, and a restricting protruding piece 46 protrudes outward from the tip end thereof in the longitudinal direction of the lid 40.
[0027]
Next, the plug 50 will be described. As shown in FIG. 2, the plug 50 has a rectangular cylindrical housing 54 having one end and a bottom, and a concave portion 51 (see FIG. 7) is opened on the lower surface. A shaped lever 60 is rotatably provided.
[0028]
As shown in FIG. 2, the lever 60 has one end of a pair of arms 61, 61 connected to each other by an operation unit 62, and the support shafts 63, 63 from each arm 61, 61 toward the housing 54 (see FIG. 7). To protrude. Then, the support shaft 63 is inserted into shaft holes 63H (see FIG. 7) formed on both side surfaces of the housing 54, so that the lever 60 can rotate.
[0029]
As shown in FIG. 2, on both side surfaces of the housing 54, there are provided rotation restricting projections 55 and 56 for restricting the movable range of the lever 60. With these, the lever 60 has the upright posture shown in FIG. It rotates only in the range of 90 degrees between the horizontal posture shown in FIG.
[0030]
In the housing 54, as shown in FIG. 7, a wall portion 54A constituting a part of the peripheral wall is formed separately from the other main body portion 54B, and the wall portion 54A is not mounted on the main body portion 54B. In this state, the gate-shaped movable electrode 70 is housed in the recess 51 from the open portion, and then the open portion is closed by the wall 54A.
[0031]
Further, the recess 51 formed in the housing 54 is wider on the back side than the opening, and the movable electrode 70 accommodated in the recess 51 has its lower end abutted on the opening edge of the recess 51 in a natural state. It is locked.
[0032]
As shown in FIG. 7, the movable electrode 70 is formed by connecting first and second leg pieces 71 and 72 that are in contact with the fixed electrodes 20 and 21 with a continuous portion 73 with the protruding wall 18 interposed therebetween. At the lower end portions of 71 and 72, contact points 71A and 72A protrude toward sides approaching each other. The width of the movable electrode 70 is set wider than the distance between the two lance protection walls 26, 26.
[0033]
The breaker device of the present embodiment has the above-described configuration, and its operation will be described below. This breaker device is attached to an electric vehicle as follows. First, a part of the power wire of the electric vehicle is fixed to the breaker body 10 as the wires D1 and D2, and a bolt is passed through a mounting hole 11A (see FIG. 5) formed in the base 11 so that the breaker body 10 is It is fixed to a predetermined part of the electric vehicle.
[0034]
Next, the lid 40 is attached to the fuse accommodating portion 16 of the breaker body 10. The lid 40 is pressed so that the long wall 43 and the short wall 44 are fitted to the outside of the long wall 13 and the short wall 14 of the breaker main body 10. The formed locking hole 44A engages with the locking projection 14A formed on the short wall 14 of the breaker body 10 (see FIG. 3). At this time, the vertical wall 45 provided on the lid 40 enters between the pair of partition walls 17 provided at one end of the fuse accommodating portion 16, and the restricting projection 46 is formed on the base 11 of the breaker body 10. It is laid near the rising portion of the projecting wall 18 (see FIG. 7).
[0035]
In this state, the plug 50 is mounted on the plug housing 15 provided on the breaker body 10. Specifically, the opening of the recess 51 of the plug 50 faces the tip of the protruding wall 18, and the tip of the protruding wall 18 is addressed between the pair of leg pieces 71 and 72 of the movable electrode 70. Press the plug. Then, as shown in FIG. 8, one leg piece 71 rides on the projection 23 provided on the front side of the projection wall 18, and the other leg piece 72 is mounted on the lance protection wall 26 on the back side of the projection wall 18. Get on 26. Here, since the lance protection walls 26, 26 protrude laterally higher than the lance 25 from the projecting wall 18, the leg pieces 72 do not come into contact with the lance 25. In addition, since the lance protection walls 26 form a pair and support the leg pieces 72 in a double-supported state, the leg pieces 72 are securely separated from the lance 25, and the lance 25 is reliably prevented from being pushed by the leg pieces 72. It comes off.
[0036]
When the plug 50 is pushed all the way in, the two leg pieces 71, 72 are restored and the contacts 71A, 72A provided at their lower end portions contact the respective fixed electrodes 20, 21, so that conduction between the fixed electrodes 20, 21 is established. Connected.
[0037]
Next, as shown in FIG. 10, the lever 60 provided on the plug 50 is rotated from the upright posture to the horizontal posture, and the operation portion 62 side of the lever 60 is engaged with the locking piece 28 provided on the breaker body 10. Then, the work of mounting the plug 50 is completed.
[0038]
In order to remove the plug 50, the lever 60 may be turned from the horizontal posture to the standing posture, and the plug 50 may be pulled out. Also at this time, the leg piece 72 is opened and pulled out from the lance protection wall 26 so as not to abut the lance 25.
[0039]
As described above, according to the breaker device of the present embodiment, the pair of fixed electrodes 20 and 21 are laid on the front and back of the protruding wall 18 and collected at one location, so that the space around the fixed electrodes 20 and 21 is shared. Thus, the size of the breaker device is reduced. Further, since the second fixed electrode 21 is prevented from coming off by the lance 25, there is no possibility that the second fixed electrode 21 is pulled upward by the frictional force when the movable electrode 70 is pulled out. Moreover, when the second fixed electrode 21 is moved from the upper end side of the protruding wall 18 to the base end side and assembled, the lance 25 is pushed in the middle thereof and retreats from the movement path of the second fixed electrode 21. The second fixed electrode 21 can be easily assembled without disturbing the lance 25. In addition, when the movable electrode 70 is inserted or removed, the lower end portion of the leg 72 provided on the movable electrode 70 is opened by the lance protection wall 26 provided next to the lance 25 so that the lower end portion does not contact the lance 25. Therefore, the lance 25 is not deformed due to the insertion and removal of the movable electrode 70, and the second fixed electrode 21 can be stably held.
[0040]
<Other embodiments>
The present invention is not limited to the embodiments. For example, the following embodiments are also included in the technical scope of the present invention, and various modifications other than those described below may be made without departing from the scope of the invention. Can be implemented.
(1) Although the breaker device of the above embodiment accommodates and includes the fuse 35, the present invention may be applied to a device without a fuse.
[0041]
(2) In the above embodiment, two lances 25 and two lance protection walls 26 are provided. However, for example, a configuration in which one lance protection wall is provided beside one lance may be used. .
[Brief description of the drawings]
FIG. 1 is a perspective view of a breaker device according to an embodiment of the present invention. FIG. 2 is a perspective view of a state where a cover and a plug of the breaker device are removed. FIG. 3 is a perspective view of a state where a plug is inserted into a plug accommodating portion. FIG. 4 is a side sectional view of the breaker body. FIG. 5 is a plan view of the breaker body. FIG. 6 is a perspective view showing the protruding wall and the fixed electrode. FIG. 7 is a side cross-sectional view before plugging the protruding wall with a plug. FIG. 8 is a side sectional view of a state in which a plug is being mounted on a protruding wall. FIG. 9 is a side cross sectional view of a state in which a plug is mounted on a protruding wall. FIG. 10 is a side view of a breaker device. FIG. 12 is a cross-sectional view of a breaker device for explaining a problem.
DESCRIPTION OF SYMBOLS 10 ... Breaker main body 18 ... Protrusion wall 20 ... First fixed electrode 21 ... Second fixed electrode 25 ... Lance 25A ... Locking part 26 ... Lance protection wall 70 ... Movable electrodes 71, 72 ... Leg pieces 71A, 72A ... Contact

Claims (2)

A pair of plate-shaped fixed electrodes are provided on the front and back surfaces of the projecting wall rising upward from the breaker body, and a gate-shaped movable electrode capable of short-circuiting between the fixed electrodes is provided, and the movable electrode is mounted on the projecting wall. Then, the lower end portions of the pair of leg pieces provided on the movable electrode, in which the interval between them is narrower, are in contact with the respective fixed electrodes, and the gap between the two fixed electrodes is changed from the non-conductive state to the conductive state. In a switchable breaker device,
A lance that extends downward in a cantilever manner from the upper end of the protruding wall and abuts against the distal end surface of the fixed electrode to prevent the fixed electrode from falling off,
A lance that is provided next to the lance in the protruding wall and that opens when the lower end portion of the leg piece passes through the distal end side of the protruding wall so that the leg piece does not contact the lance. A breaker device comprising a protection wall. The lance protection walls are provided in pairs,
The breaker device according to claim 1, wherein the lances are provided in pairs between the two lance protection walls.

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