JPS6032230A - Dripping mechanism of leakage breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a tripping structure for an earth leakage breaker.

[Background technology]

Generally, in an earth leakage breaker or an overcurrent breaker, the switch is turned on and off using a handle, and a display element indicates a trip during a trip operation. However, there is a problem in that the operations, displays, etc. are complicated for a housewife or the like to perform these operations.

FIG. 1 shows a block diagram of a conventional handle-operated circuit breaker. In the figure, (41) is the handle;
Link one end of 41) and the center of the lever (43) o4
They are rotatably connected to each other. The base end of the lever (43) is engaged with the center part of the tripping plate (44), and the lever (43)
Press the movable contact (4) with the bottom surface of the tip of the fixed contact (43) and fix the movable contact (a) η to the fixed contact (46).
8). Due to the leakage detection output, the tripping plate 04) rotates to the left in the figure, and the engagement between the tripping plate 04) and the lever (rotation) is released, and the upward elastic force of the spring ←9) causes both contacts to rotate. +47) (The state dissociates. A so-called trip operation is performed. In the case of such a conventional example, if a trip display mechanism is provided to indicate that a trip operation has been performed, it must be provided separately, and also when operated, the handle The formula needs to be flicked or squeezed with the fingers, which requires the handle (41) to be a certain length, which poses a problem in terms of miniaturization of the instrument.

Figure 2 shows a tripping mechanism using a push button (60), and the push button (60) and lever (4 The tripping base wall is rotatably supported in the center, and is latch-engaged with Shi7S-(c) at the bottom. The pin is a holding member that holds the base of the movable contact part.The tripping operation is performed by driving the plunger t-J21 and rotating the tripping plate 0 (1) clockwise. Plate (44) and 7S-(g)
This is done when the latch is released and both contact points η decoy are disengaged. In such a case, the fulcrum position of the tripping plate 0 (1) is located approximately in the center of the latch retaining portion and the tripping coil's plunger country, and therefore the tripping coil has a high output (plunger (strong push of 5)). In addition, the method of holding the movable contact enclosure requires a separate part as a holding member (roller) to hold the fulcrum.

[Purpose of the invention]

The present invention has been provided in view of the above-mentioned points, and aims to provide a tripping structure for an earth leakage breaker that simplifies operation and integrates trip display and on/off operation. .

[Disclosure of the invention]

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Figure 8 shows the tripping mechanism (11 is a case, and inside this case full is a frame (2) with a cross-section shaped like an opening.
is placed. (5) is a cam with an approximately triangular cross-sectional shape, and a shaft aQ is rotatably passed through the top of this cam (5), and both ends of the shaft αQ are held by a frame (2). There is. An elongated hole αη is bored in one end of the cam (6), and an L-shaped hole α barrel is also bored in the frame (2). (4) is a set button that serves both on/off operation and trip display, and the set button (4) is arranged so as to be movable up and down from the square hole 〇〇 of the case (1), as will be described later. A hanging piece is hung on both sides of the lower part of the set button (4), and the hole Qη of this hanging piece (E) and the frame (
Insert the shaft pin (3) into the L-shaped hole (G) of 2) and the elongated hole (L71) of the cam (5), and insert the shaft pin (3) into the L-shaped hole IXI of the frame (2) and the long hole (L71) of the cam (5). It is movable in the long hole (1"/). The shaft aQ rotatably supports the cam (6).
A spring OQ is wound around the outer circumference of the reed, and one end of the link 00 is locked to the locking part (c) of the frame (2), and the other end of the spring OQ is connected to the shaft pin. (3), and the cam (5) is urged clockwise by the urging force of the splinter 00, and the set button (4) is urged upward through the elongated hole (G) of the frame (2). Set button (4) to case (1)
) is made to protrude from the top surface. Fixed contacts (6) are arranged at the inner bottom of the case (1) on both sides of the frame (2), and a movable contact (7) opposite to the fixed contacts (6).
The base of a contact spring (8) in the form of a plate, which is fixed to the lower surface of the tip, is hissed to the bottom. At the bottom of the frame (2), a tripping plate (1o) is rotatably supported by a pin (c), and on the outer periphery of the pin (c) a suspension link is attached. , one end of the spring (to the spring) is the frame (2)
The other end urges the tripping plate (10) clockwise. (9) is a movable frame that presses the contact spring (8) downward to close the contact f6+ +71, and the contact spring (9) is biased upward by the side pieces (9a) on both sides of the frame (2). 8) Press the top surface. (11) is a cross-shaped link, the upper part of which is rotatably connected to the other end of the cam (5) through the slotted hole of the frame (2), and the lower part of which is connected to the vertically elongated hole of the frame (2). It is rotatably connected to the lever (l) via the lever (l). A presser piece (c) is formed at one end of the lever θ, and this presser piece (c) holds the movable frame (l)
) to hold down the protrusion (a) at the top of the center. Further, a retaining piece (c) is formed at the other end of the lever Q2, and this retaining piece) is configured to latch and engage with a recessed part formed on the inner side of the tripping plate Qol. It's Nishide.

There is a lever (2) below the four parts (4) of the tripping plate (10).
) is formed on the inclined surface on which the retaining piece (c) slides,
Further, a release piece (31) for performing a tripping operation is integrally formed on the upper side of the tripping plate (jO). (A) is a tripping coil that is excited by the detection output that detects earth leakage. A plunger α→ is installed inside this tripping coil 03, and when the tripping coil 03 is energized, it is activated by magnetic attraction force. The plunger α→ is projected to press against the release piece @1), and the tripping plate (10) is rotated counterclockwise.

Therefore, Fig. 3 shows the set state, and Fig. 8 (
As shown by the two-dot chain line in case t1), when the upwardly protruding set button (4) is pressed downward, the shaft pin (3) moves downward and the cam (5) is attached to the splinter 00. Rotates counterclockwise against the force. And cam (5)
As the link (11) rotates, the upper part of the link (11) moves laterally within the L-shaped hole 0, and the lower part of the link θ force drives the lever 0 downward. In the off state, the movable frame (9) moves upward as shown by the two-dot chain line under the biasing force of the contact spring (8), and the retaining piece (c) of the reno fan (a) is moved by the tripping plate. (1
It is located at the bottom of the slope of the lever (12), and when the lever 0'4 is pushed downward by the link 01, the lever (12's presser piece (a) Press the movable frame (9) downward to close the contact +61 (71), and since the upper part of the link 0υ is located to the right of the axis OQ, the retaining piece (2) of the lever θ is tripped. Board (I
The engaging piece (E) is moved upward along the inclined surface (7) of the O1, and the engaging piece (E) bottoms out in the recessed part and is latched. Also,
Since the upper part of the link Ql) is located to the right of the axis θQ shown in FIG. 8(a), the cam (5) stops at the line of fire, and the set button (4) is in the set state when pushed in. It becomes.

Here, when a current leakage occurs and the tripping coil at is excited by the detection output, the magnetic attraction force causes the plunge 'f)
-(+4) protrudes and the release plate (Ill release piece (31)
). Then, the tripping plate (10) rotates counterclockwise against the biasing force of the splinter (A), and the recessed part of the tripping plate OO) and the engagement piece of the lever 0O are connected. Latch retention is released. At this time, the movable frame (9) is lifted by the upward biasing force of the contact spring (8) and the contact point +6
1 As F7+ opens and separates, lever 02 rotates counterclockwise around the bottom of link Ql), and the retaining piece (g) of lever (2) moves downward as shown in Figure 4. . This state is a trip-free state. After that, the cam (5) rotates counterclockwise due to the return force of the splinter OQ, and as the cam (6) rotates, the shaft support H-J (3) that interlocks with the cam (5) rotates. and the set button (4) is in the case (
1) It protrudes from the top surface and displays that it is in trip state a (off). In addition, in order to return to the OFF state, forcibly create a current leakage using a test button (not shown), etc., and perform a trip operation to close the contact (61 (7)).
) to set button (4) are reset.

FIG. 6 shows a plan view of the earth leakage breaker main body A having the above-mentioned tripping mechanism, and FIG. 7 is an external view of the earth leakage breaker main body A, which is of a waterproof type and includes a waterproof case 13. In Figure 7, there is a plug blade insertion hole I) on the bottom surface of the main body A.
(34) is a cord holder, and (3ω is a ground terminal.) The operating section (4
), the foam surface test button (37) and energization lamp 138) are on the left side, and the earth check button (39+) is on the right side.
, earth check rafts (1 (2)) are provided.

〔Effect of the invention〕

As described above, the present invention includes a set button that protrudes upward from the case and is rotatably moved up and down on the frame by a shaft pin, and a set button that is connected to the shaft hinge and rotatably supported on the frame so that it can move upwardly. A cam that is biased by a spring, a plate-shaped contact bar that has an upward biasing force that has a movable contact opposite to a fixed contact fixed to its lower surface, and a contact bar that presses the top surface of the contact spring to close both contacts. a movable frame, a tripping plate whose lower end is rotatably supported and is biased by a spring toward the movable frame, a substantially central portion is connected to a cam via a link, and one end presses the movable frame. A lever whose other end moves upward from the bottom of the movable frame and latches into approximately the center, a tripping coil that is energized by the detection output that detects the leakage, and a tripping coil that is energized by the tripping coil. a plunger P- that drives the plate in the direction opposite to the movable frame to release the latch between the tripping plate and the lever; The set button is made to protrude from the top of the case to display the trip, so simply pushing the set button can set the set state via a cam, link, lever, etc. Also, in the event of an electrical leakage, In this case, the plunger of the tripping coil presses against the tripping plate and rotates it, releasing the latch between the tripping plate and the lever, and linking the lever with the upward biasing force of the contact spring. By rotating the cam back through the cam and by making the set button protrude from the top of the case through the shelf, in other words, by disassembling the conventional handle shape into the cam and the set button, the trip display can be displayed. can be easily realized. In addition, the fulcrum position of the tripping plate is at the bottom, the latch with the lever is made approximately in the center, and the plunger is pressed against the top, so the pressing force on the tripping plate due to the plunger is small. Therefore, the tripping coil can be relatively small. Further, since the contact spring is a plate-shaped spring, the contact spring can be fixed simply by a hissing stop, and there is an effect that no separate parts are required as in the conventional case.

[Brief explanation of the drawing]

Figure 1 is a conventional configuration diagram, Figure 2 is another conventional configuration diagram,
3(a) and 3(b) are vertical and horizontal sectional views of the tripping mechanism according to the embodiment of the present invention, FIG. 4 is a sectional view showing the same trip-free state, and FIG. 5 is the same trip-free state. A sectional view showing the state, FIG. 6 is a plan view of the earth leakage breaker main body, and FIGS. 7(a) to 7(d) are a front view, a bottom view, a plan view, and a side view of the same. +l) is the case, (2) is the frame, (3) is the shaft bin,
(4) is a set button, (6) is a cam, (6) is a fixed contact,
(7) is a movable contact, (8) is a contact spring, (9) is a movable frame, (10) is a tripping plate, 0η is a link, a is a lever,
θ hoof indicates a tripping coil, a41 indicates a plan, and P-. Agent Patent Attorney Ishi 1) Chief 7 Figure 6 Figure 7 (0)

Claims (1)

[Claims] fl) A set button that protrudes upward from the case and is attached to the frame so as to be movable up and down by a shaft hinge, and a set button that is connected to the shaft pin and rotatably supported by the frame and springs upwardly. A biased cam, a leaf spring-like contact spring having an upward biasing force with a movable contact opposite to a fixed contact fixed to the lower surface, and a movable frame that presses the upper surface of the contact spring to close both contacts. , a tripping plate whose lower end is rotatably supported and spring-biased toward the movable frame, and a substantially central portion is connected to a cam via a link, one end presses the movable frame and the other end is movable. a lever that moves upward from the bottom of the frame and latches to approximately the center;
A plan in which a tripping coil is energized by the detection output that detects electric leakage, and the excitation of the tripping coil drives the tripping plate in the direction opposite to the movable frame to release the latch engagement between the tripping plate and the lever. A tripping structure for an earth leakage breaker, the earth leakage breaker comprising: a spring biasing force applied upwardly by a cam when the latch is released, causing the set button to protrude from the upper surface of the case to indicate a trip.