JP3228997B2 - Remote control circuit breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control circuit breaker.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
The operation terminal 102 of the electromagnet 101 is provided at one end, and a mounting portion 104 is provided near the mounting surface 103 of the operation terminal 102, and the base 100 is mounted on a mounting claw (not shown). 105
Is a printed circuit board having a changeover switch 106, 107 is a cover for closing an opening on the front side of the base 100, and 109 is a main terminal.

In this case, the distance between the mounting claw to be locked to the mounting portion 104 and the operation terminal 102 is short, and an insulating plate insertion groove is provided between the mounting portion 104 of the base 100 and the operation terminal 102 in order to secure insulation. 107 are formed, and the insulating plate insertion groove 10 is formed.
7, an outer end portion extends outward through an insulating plate 108.

[0004]

However, the insulating plate 108
There is a disadvantage that the insulating plate 108 is easily pulled out when the wire is pulled outward. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a remote control circuit breaker capable of preventing an insulating plate from coming off.

[0005]

According to a first aspect of the present invention, there is provided a remote control circuit breaker having a terminal at one end, a mounting portion adjacent to a mounting surface of the terminal, and an inner bottom surface having the mounting portion. An electromagnet accommodating portion located closer to the mounting surface than the inside, and an opening was formed in the side surface, and an insulating plate insertion groove was formed between the mounting portion and the terminal at the edge of the opening. A base, a cover for closing the opening of the base, a cover having an inner surface formed with a recess formed along the insulating plate insertion groove and the inner bottom surface of the electromagnet accommodating portion, and a cover accommodated in the electromagnet accommodating portion; An electromagnet having a contact opening / closing plunger reciprocating in a direction perpendicular to the inner bottom surface, and a printed circuit board provided on the inner bottom surface side of the electromagnet housing portion having a changeover switch interlocked with the plunger. The insulating plate insertion groove has a width greater than the depth thereof, an intermediate portion is inserted into the insulation plate insertion groove, an outer end portion extends outward from between the terminal and the mounting portion, and an inner end portion. An insulating plate in contact with the inner surface on the opposite side along the inner surface and the inner bottom surface of the electromagnet accommodating portion, and a portion of the insulating plate protruding from the opening of the base is formed in the concave portion of the cover. It is located.

According to a second aspect of the present invention, there is provided the remote control circuit breaker according to the first aspect, wherein the substantially central portion of the inner end of the insulating plate is bent, and the convex surface presses the printed circuit board toward the plunger. Things.

[0007]

According to the remote control circuit breaker of the first aspect, the mounting surface is mounted on the mounting surface, the mounting portion is mounted by the mounting means, and the terminal is connected to the electric wire.
Since the outer end of the insulating plate is interposed between the terminal and the mounting portion, the insulation of the terminal with respect to the mounting portion can be ensured, and the contact portion can be opened and closed when a signal is supplied to the electromagnet to drive the plunger.

In this case, since the inner end of the insulating plate abuts the inner surface on the opposite side along the inner surface and the inner bottom surface of the electromagnet accommodating portion from the insulating plate insertion groove, the insulating plate has a shape that is hard to come off, so that the insulating plate is insulated. Even if the outer end of the plate is pulled outward, it becomes difficult to pull out. Moreover, the insulating plate has a width larger than the depth of the insulating plate insertion groove, and the protruding portion of the insulating plate from the opening of the base is located in the concave portion of the cover, so that the gap between the base and the cover is closed by the insulating plate. The insulation of the printed circuit board can be ensured.

According to the remote control circuit breaker of claim 2, in claim 1, the substantially central portion of the inner end of the insulating plate is bent, and the printed board is moved toward the plunger by its convex surface. Due to the pressing, in addition to the operation of claim 1, the changeover switch on the printed circuit board can be positioned with respect to the plunger, and the impact force of the plunger applied to the printed circuit board via the changeover switch can be buffered by the elasticity of the insulating plate. Since there is no need to provide a separate spring, the number of parts does not increase.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. That is, this remote control circuit breaker includes a base 1, a cover 2, an electromagnet 3,
And a printed circuit board 4. The base 1 has a terminal 6 at one end, a mounting portion 8 adjacent to the mounting surface 9 of the terminal 6, and an electromagnet housing portion in which the inner bottom surface 18 is positioned closer to the mounting surface 9 than the mounting portion 9. 7, an opening 5 is formed in the side surface, and an insulating plate insertion groove 12 is formed between the mounting portion 8 at the edge of the opening 5 and the terminal 6. The terminal 6 is an operation terminal of the electromagnet 3 as an embodiment. As shown in FIG. 2, a power supply terminal 21 of the main circuit is provided on the upper side thereof, and a load terminal 22 is provided at an end of the base 1 opposite to the power supply terminal 21. Provided. The mounting surface 9 is placed on a mounting surface (not shown), and the mounting portion 8 is locked by a mounting claw (not shown) of the mounting means, and the base 1 is mounted on the mounting surface.

The cover 2 closes the opening 5 of the base 1, and has an inner surface formed with a concave portion 20 formed along the insulating plate insertion groove 12 and the inner bottom surface 18 of the electromagnet housing 7. In the embodiment, the connection pins (not shown) are attached to four attachment holes 23 provided in the base 1 and the cover 2. The electromagnet 3 has a contact opening / closing plunger 10 housed in the electromagnet housing 7 and reciprocating in a direction perpendicular to the inner bottom surface 18. In the embodiment, as shown in FIG. 3, a coil frame 25 around which a coil 24 is wound, a plunger 10 penetrating the coil frame 25, a pair of inner yokes 26 disposed on the side of the coil 24, and an inner yoke 26, an outer yoke 28 provided outside the permanent magnet 27, and a contact provided at both ends of the plunger 10 and located between both ends of the outer yoke 28 and the inner yoke 26. And a pole 29. When a current is applied to the coil 24 in one direction, the coil 24 is excited and the plunger 10 moves, and the state is held by the permanent magnet 27. When a current is applied to the coil 24 in the opposite direction, the plunger 1
0 moves in the opposite direction. Reference numeral 30 denotes a residual plate provided between the armature 29 and the outer yoke 28, 31 denotes a connecting member, and 32 denotes a lead wire connected to the coil 24, which is connected to the printed circuit board 4.

The printed circuit board 4 has a changeover switch 11 linked to the plunger 10 and is mounted on the inner bottom surface 18 of the electromagnet housing 7. The changeover switch 11 is for switching the energizing direction of the coil 24 every time the coil 24 is excited. The plunger 10 is operated by the excitation of the coil 24, and is driven by the plunger 10 to operate the changeover switch 11. The printed circuit board 4 of the embodiment has a support recess 33 on the inner bottom surface 18 side of the inner side surfaces 17 and 19 of the electromagnet accommodating portion 7, and the support recess 33 is engaged with both ends of the printed circuit board 4 to be installed. Further, the inner end of the terminal 6 is connected to the printed circuit board 4, and the terminal 6 is mounted on the printed circuit board 4 at the time of assembling. It is attached to. Note that the insulating plate 1 is attached to one end of the printed circuit board 4.
A notch 45 is formed for inserting the third through hole 3. 46 is a diode for supplying half-wave current to the coil 24.

The insulating plate 13 has a width greater than the depth of the insulating plate insertion groove 12, the intermediate portion 14 is inserted into the insulating plate insertion groove 12, and the outer end 15 is positioned between the terminal 6 and the mounting portion 8. The inner end 16 extends outward, and the inner end 16 extends along the inner side surface 17 and the inner bottom surface 18 of the electromagnet housing 7.
9, the protruding portion 13a (see FIG. 6) of the insulating plate 13 from the opening 5 of the base 1 is located in the concave portion 20 of the cover 2. As shown in FIGS. 4 and 5, the insulating plate 13 of the embodiment uses a sheet made of a bendable flexible transparent fiber, and the inner end portion 16 has a width approximately half that of the intermediate portion 14. It is formed so as to cover the joint between the base 1 and the cover 2. In addition, the intermediate portion 14 has an insulating plate insertion groove 12 formed in a substantially Z-shape to also serve as a retaining effect, and the insulating plate 13 has a total of four bent portions 34a to 34d corresponding thereto.

In FIG. 2, reference numeral 35 denotes a first movable contact which is driven by the plunger 10 of the electromagnet 3 via the connecting member 31 and the lever 36. 37 detects an abnormal current, and has a bimetal 38 for detecting an overcurrent and an electromagnet 39 for detecting a short-circuit current. 40 is bimetallic 38
An opening / closing mechanism 41 which trips in response to the operation of the electromagnet 39;
Reference numeral 43 denotes a second movable contact that opens a trip from the first movable contact 35 by the operation of the opening / closing mechanism 40, and 43 denotes an arc extinguishing device.

According to this embodiment, the mounting surface 9 is placed on the surface to be mounted, the mounting portion 8 is mounted by mounting means (not shown), and an electric wire (not shown) is connected to the terminal 6 for installation. However, the outer end 15 of the insulating plate 13 is located between the terminal 6 and the mounting portion 8.
The insulation of the terminal 6 with respect to the mounting portion 8 can be ensured because of the interposition of the plunger 1 by supplying a signal to the electromagnet 3.
When 0 is driven, the first movable contact 35 as a contact portion can be opened and closed.

In this case, since the inner end 16 of the insulating plate 13 comes into contact with the inner surface 19 on the opposite side along the inner surface 17 and the inner bottom surface 18 of the electromagnet accommodating portion 7 from the insulating plate insertion groove 12,
Since the insulating plate 13 has a shape that is difficult to come off, it becomes difficult for the insulating plate 13 to come off even if the outer end 15 of the insulating plate 13 is pulled outward. Moreover, the insulating plate 13 has a width larger than the depth of the insulating plate insertion groove 12 and the portion of the insulating plate 13 protruding from the opening 5 of the base 1 is located in the concave portion 20 of the cover 2. 6 (see FIG. 6) is closed by the insulating plate 13, so that the insulation of the printed circuit board 4 with respect to the gap 44 can be ensured. Therefore, the quality can be stabilized.

FIGS. 7 and 8 show a second embodiment of the present invention.
Shown in That is, this remote control circuit breaker is different from the first embodiment in that the inner end 1 of the insulating plate 13 is provided.
6 has a substantially central portion curved, and the convex surface 46 presses the printed circuit board 4 toward the plunger 10 side. In this embodiment, the width of the inner end 16 is made the same as that of the outer end 15 in order to increase the elastic force, and a cutout 47 into which the printed circuit board 4 is inserted is formed in the intermediate part 14.

In this embodiment, the changeover switch 11 on the printed circuit board 4 can be positioned with respect to the plunger 10, and the impact force of the plunger 10 applied to the printed circuit board 4 via the changeover switch 11 is buffered by the elasticity of the insulating plate 13. Since there is no need to provide a separate spring, the number of parts does not increase. That is, since it is necessary to stabilize the timing of the operation of the plunger 10 and the operation of the changeover switch 11, the changeover switch 11 on the printed circuit board 4 is positioned with respect to the plunger 10, and the impact of the plunger 10 is reduced. This is because, when a spring is provided to support, if the spring is provided as a separate part, the number of parts increases.

Incidentally, one end of the printed circuit board 4 may be supported by the terminal 6. The terminal 6 is the terminal 6 of the coil 24.
However, it may be a terminal of the main circuit.

[0020]

According to the remote control circuit breaker of the present invention, the inner end of the insulating plate contacts the inner surface on the opposite side along the inner surface and the inner bottom surface of the electromagnet housing from the insulating plate insertion groove. Since the insulating plate comes into contact with the insulating plate, the insulating plate has a shape that is difficult to come off.
Moreover, the insulating plate has a width larger than the depth of the insulating plate insertion groove, and the protruding portion of the insulating plate from the opening of the base is located in the concave portion of the cover, so that the gap between the base and the cover is closed by the insulating plate. There is an effect that insulation of the printed circuit board can be ensured.

According to a second aspect of the present invention, in the first aspect, the substantially central portion of the inner end of the insulating plate is curved, and the printed board is moved toward the plunger by a convex surface. Due to the pressing, in addition to the effect of claim 1, the changeover switch on the printed circuit board can be positioned with respect to the plunger, and the impact force of the plunger applied to the printed circuit board via the changeover switch can be buffered by the elasticity of the insulating plate. Since there is no need to provide a separate spring, the number of parts does not increase.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a first embodiment of the present invention.

FIG. 2 is a front view showing a state where a cover is removed.

FIG. 3 is an exploded perspective view of an electromagnet.

FIG. 4 is a plan view of an insulating plate.

FIG. 5 is a side view of the insulating plate.

FIG. 6 is a bottom view.

FIG. 7 is a partial front view of the second embodiment.

FIG. 8 is a perspective view of the printed board and the insulating plate.

FIG. 9 is a front view of a conventional example in which a part of a cover is broken.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Cover 3 Electromagnet 4 Printed circuit board 5 Opening 6 Terminal 7 Electromagnet accommodating part 8 Mounting part 9 Bottom surface 10 Plunger 11 Switch 12 Insulating plate insertion groove 13 Insulating plate 14 Intermediate part 15 Outer end part 16 Inner end part 17, 19 Inner side surface 18 Inner bottom

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-30030 (JP, A) JP-A-4-87133 (JP, A) JP-A-5-82003 (JP, A) 60856 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01H 75/10 H01H 71/02

Claims (2)

(57) [Claims] 1. An electromagnet accommodating portion having a terminal at one end, a mounting portion adjacent to a mounting surface of the terminal, and an inner bottom surface positioned closer to the mounting surface than the mounting portion. A base having an opening formed in a side surface thereof and an insulating plate insertion groove formed between the mounting portion and the terminal at an edge of the opening; and closing the opening of the base, A cover formed on the inner surface with an insulating plate insertion groove and a concave portion formed along the inner bottom surface of the electromagnet accommodating portion; An electromagnet having a plunger, a printed circuit board having a changeover switch interlocked with the plunger, and being installed on the inner bottom surface side of the electromagnet accommodating portion, having a width larger than the depth of the insulating plate insertion groove, Part is Inserted into the edge plate insertion groove, the outer end extends outward from between the terminal and the mounting portion, and the inner end is located on the opposite side along the inner side surface and the inner bottom surface of the electromagnet accommodating portion. A remote control circuit breaker, comprising: an insulating plate abutting on an inner surface, wherein a portion of the insulating plate protruding from the opening of the base is located in the concave portion of the cover. 2. The remote control circuit breaker according to claim 1, wherein a substantially central portion of said inner end portion of said insulating plate is curved, and said printed circuit board is pressed against said plunger by a convex surface thereof.