JP6729924B2 - Earthquake breaker for lever-embedded breaker - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a breaker breaker device for breaking an electric current by tilting a lever of a breaker at the time of an earthquake, and more particularly to a lever-embedded breaker in which a lever is accommodated in a lever accommodating portion recessed in a surface of a breaker case. Related to the earthquake interruption device.

As a breaker earthquake breaker, a weight is connected to the tip of a lever projecting diagonally upward on the surface of the breaker case via a string, and the weight is placed on a mounting table. A weight type is known in which the lever is pulled down obliquely by the weight of the weight that has dropped from the table and the current is cut off (see Patent Documents 1 and 2).

According to the breaker earthquake breaker, power supply to electric appliances (electric stoves, dryers, etc.) used in a house where the breaker is installed is cut off during an earthquake, so that, for example, when the earthquake shakes Even if a stove or the like falls, it is possible to prevent a power fire at the time of re-transmission of power due to the restoration of the power failure after the earthquake.

JP, 2006-164649, A JP, 9-245604, A

By the way, as the type of breaker, as described above, in addition to the lever projecting type breaker in which the lever is projected on the surface of the breaker case, the lever accommodating portion is recessed on the surface of the breaker case, and the lever accommodating portion is A lever embedded breaker in which a lever is housed is known.

In this lever-embedded breaker, the lever is rotatably housed in a vertical position and a tilted position in a lever housing part that is recessed in the surface of the breaker case. It is necessary to cut off the current in a tilted posture. Therefore, it is necessary to rotate the lever in the vertical position during normal operation to the inclined position due to the weight of the weight during an earthquake.

Here, the weight of the weight is added downward in the vertical direction by the action of gravity. Therefore, it cannot be said that it is efficient to connect the string of the weight to the tip of the lever in the vertical posture and rotate the lever in the vertical posture by the weight of the weight acting vertically downward so as to be in the inclined posture. That is, it cannot be said that the lever is rotated by effectively utilizing the weight of the weight, and there is room for improvement.

An object of the present invention, which was devised in consideration of the above circumstances, is to accurately tilt a lever in a vertical posture housed in a lever housing portion recessed in the surface of a breaker case by effectively utilizing the weight of the weight. An object of the present invention is to provide an interruption device for a lever-embedded breaker that can be rotated in any posture during an earthquake.

The present invention devised to achieve the above object is a lever-embedded breaker in which a lever accommodating portion recessed in the surface of a breaker case accommodates a lever that is rotatable in a vertical posture and an inclined posture. It is an earthquake breaker that is applied to normalize the vertical posture of the lever in an inclined posture during an earthquake and shuts off the current, and is supported by contacting the rear wall of the lever housing and the rear face of the vertical posture of the lever. Member and the pushing member are lowered between the rear wall of the lever accommodating portion and the back surface of the lever, and the weight is connected to the pushing member via the cord body in order to widen the gap and make the lever in an inclined posture. There is provided a lever mounting breaker breaker during an earthquake, which is provided with: a weight placing table on which a weight is placed in a non-seismic state and which is dropped during an earthquake.

In the lever-embedded breaker seismic isolation device according to the present invention, the widening member includes a first contact portion that contacts a rear wall of the lever housing portion and a second contact portion that contacts a rear portion of the lever in a vertical posture. It may have a portion and a cord attachment part to which a cord is attached, and the cord attachment part may be arranged below an imaginary line connecting the first contact part and the second contact part.

In the seismic isolation device for a lever-embedded breaker according to the present invention, the widening member has a portion of a shape that expands upward above a virtual line connecting the first contact portion and the second contact portion. You may have.

In the lever-breaker-type breaker seismic isolation device according to the present invention, the pushing member has an inverted triangular cross-section formed so as to expand upward from the surface in contact with the rear wall of the lever accommodating portion and the surface in contact with the rear surface of the lever. You may have a part.

The lever-embedded breaker breaker during an earthquake according to the present invention can exhibit the following effects.
(1) When the weight falls from the weight mounting table during an earthquake, the pushing member supported by contacting the rear wall of the lever accommodating portion recessed in the surface of the breaker case and the rear surface of the vertical lever, It descends between the rear wall of the housing portion and the back surface of the lever, and the pushing widening member expands the space between the rear wall of the lever housing portion and the back surface of the lever, so that the lever is in an inclined posture. As a result, the current is cut off.
(2) Unlike the conventional type, the lever of the breaker is not pushed down by the weight of the weight, but the widening member that descends by the weight of the weight spreads between the rear wall of the lever accommodating portion and the rear portion of the lever. It is rotated. That is, the pushing member that descends with the weight of the weight functions as a wedge that widens the space between the rear wall of the lever housing portion and the back surface of the lever. Therefore, the lever accommodated in the lever accommodating portion in the vertical posture can be pivoted to the inclined posture by effectively utilizing the weight of the weight acting vertically downward.
(3) As described above, since the pushing member functions as a wedge that widens between the rear wall of the lever housing portion and the back surface of the lever, in the lever-embedded breaker, the lever housing portion is housed in the vertical posture. The lever can be accurately tilted by efficiently using the weight of the weight.

It is a perspective view showing the outline of the interception device at the time of the earthquake of the lever embedding breaker concerning one embodiment of the present invention. It is explanatory drawing at the time of the seismic isolation of the said breaker apparatus of a lever embedded breaker at the time of an earthquake, (a) is a side sectional view (XX sectional view taken on the line of (b)), (b) is a front view. It is an explanatory view at the time of an earthquake of the above-mentioned lever embedding breaker's earthquake interception device, (a) is a side sectional view (Y-Y line sectional view of (b)), and (b) is a front view. It is explanatory drawing which shows the operation|movement of the lever of the said interruption device of a lever embedded breaker at the time of an earthquake, (a) is a side sectional view of a lever in a vertical state at the time of a non-earthquake, (b) is a lever when it begins to fall down at the time of an earthquake. A side cross-sectional view, (c) is a side cross-sectional view in which the lever has fallen and has an inclined posture during an earthquake. It is explanatory drawing which shows the modified example of this invention, (a) is a side sectional view of a Y-shaped widening member, (b) is a side sectional view of an inverted triangular-shaped widening member, (c). FIG. 7 is a side sectional view of a type in which the upper part of the lever is flat. It is explanatory drawing which shows another modification of this invention, (a) is a side sectional view at the time of an earthquake (ZZ sectional view taken on the line of (b)), (b) is a front view at the time of an earthquake.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the invention unless otherwise specified. In this specification and the drawings, elements having substantially the same function and configuration are assigned the same reference numerals to omit redundant description, and elements not directly related to the present invention are omitted. To do.

(Lever embedded type breaker 1)
The seismic isolation device according to one embodiment of the present invention is applied to the lever-embedded breaker 1 shown in FIGS. 1 and 2. The lever-embedded breaker 1 has a lever accommodating portion 3 recessed in the surface of a breaker case 2, and the lever accommodating portion 3 accommodates a lever 4 that is rotatable in a vertical posture and an inclined posture. There is. Normally, the lever 4 is in a vertical posture in the lever accommodating portion 3 to allow energization, and at the time of overcurrent, the lever 4 is rotated around the lower rotation shaft 5 by a control circuit (not shown) to be rotated. It becomes an inclined posture that protrudes diagonally upward from and cuts off electricity.

As shown in FIGS. 1 and 2, the lever accommodating portion 3 has an upper space 6 that is recessed in a substantially rectangular parallelepiped shape from the rear wall 3a, the ceiling wall 3b, and the side wall 3c. The rear wall 3a of the upper space 6 is formed vertically, the ceiling wall 3b is horizontally formed, and the side wall 3c is formed vertically. Between the ceiling surface 3b of the upper space 6 and the upper part of the lever 4 in the vertical posture, there is formed a finger space into which a finger is inserted when the lever 4 is tilted. By inserting a finger into the finger space and tilting the lever 4 in the vertical posture to the inclined posture, it is possible to cut off the power supply regardless of whether or not there is an overcurrent.

As shown in FIGS. 2 and 3, an inclined surface portion 4b is formed on the rear surface portion 4a of the upper portion of the lever 4. The inclined surface portion 4b has a function of making it easy for the finger to be caught by the lever 4 when inserting the finger into the finger space and tilting the lever 4 in the vertical attitude to the inclined attitude. A bulging portion 4c is formed in the lower portion of the lever 4, and the bulging portion 4c is provided with a turning pin 5 that serves as a turning center when the lever 4 is tilted. The lever 4 is flush with the surface of the breaker case 2 in the vertical posture, and projects from the lever accommodating portion 3 in the inclined posture.

The above-described lever-embedded breaker 1 is equipped with an earthquake interruption device 7 according to an embodiment of the present invention described below.

(Earthquake blocking device 7)
As shown in FIG. 1 to FIG. 3, the seismic interruption device 7 according to the present embodiment is to normally energize the lever 4 in a vertical posture when the lever 4 is in an inclined posture during an earthquake. The seismic cutoff device 7 includes a pushing member 8 supported by contacting the rear wall 3a of the lever housing 3 and the back surface 4a of the lever 4 in the vertical posture, and the pushing member 8 behind the lever housing 3. In order to lower the space between the wall 3a and the back surface 4a of the lever 4 and widen the space to make the lever 4 in an inclined posture, the weight 10 connected to the widening member 8 via the cord 9 and the weight 10 are provided. A weight mounting table 11 is provided which is placed when there is no earthquake and drops when there is an earthquake. Hereinafter, each component will be described.

(Pushing member 8)
As shown in FIG. 4, the widening member 8 is made of a cylindrical body (for example, diameter 4 mm, wall thickness 1.5 mm, total length 15 mm) in the present embodiment, and is in a vertical posture with the rear wall 3 a of the lever accommodating portion 3. The lever 4 is supported in contact with the back surface portion 4a of the lever 4. When the weight 10 connected to the widening member 8 via the cord 9 falls from the weight mounting base 11, the pushing member 8 is pushed downward by the weight of the weight 10 acting vertically downward. And the slope 4b formed on the back surface 4a of the lever 4 are lowered, and the space between them is widened to make the lever 4 in an inclined posture.

As shown in FIG. 4, the pushing member 8 includes a first contact portion 8a that contacts the rear wall 3a of the lever housing portion 3, a second contact portion 8b that contacts the rear surface portion 4a of the lever 4 in the vertical posture, and The cord 9 is attached to the cord attachment portion 8c, and the cord attachment portion 8c is arranged below an imaginary line 8d connecting the first contact portion 8a and the second contact portion 8b. .. As a result, when the weight of the weight 10 is applied vertically downward to the cord attachment portion 8c, the widening member 8 stably descends between the rear wall 3a of the lever housing portion 3 and the back portion 4a of the lever 4. However, it is possible to prevent the situation where the lever 4 is disengaged from between the lever 4 and the rear wall 3a before the rotation of the lever 4 is completed.

As shown in FIG. 4, the pushing member 8 has a portion 8e having an upwardly widening shape above a virtual line 8d connecting the first contact portion 8a and the second contact portion 8b. In the present embodiment, since the widening member 8 is a cylindrical body, the virtual line 8d connecting the first contact portion 8a and the second contact portion 8b is located below the diameter of the cylindrical body, A portion 8e having an upwardly expanding shape is formed between 8d and the diameter. When the pushing member 8 descends between the rear wall 3a of the lever accommodating portion 3 and the back surface portion 4a of the lever 4, the upwardly widening portion 8e ensures that the above gap is widened. Therefore, the lever 4 can be properly tilted.

(String 9, weight 10)
As shown in FIGS. 1 to 3, a weight 10 is connected to the pressing member 8 via a cord body 9. In the present embodiment, the weight 10 has a spherical shape, but is not limited to this shape. One end of the string 9 is inserted into a cylindrical body that is the widening member 8 and is fixed in a ring shape, and the other end is fixed to the hanging metal fitting 10 a of the weight 10. As shown in FIGS. 1 and 2, the cord body 9 inserted into the cylindrical body that is the pushing member 8 passes through the gap between the side wall 3c of the lever accommodating portion 3 and the side surface 4d of the lever 4 and is pulled out to the front side. Has been.

The weight of the weight 10 and the length of the cord 9 are determined by the potential energy determined by the weight of the weight 10 and the drop height (correlation with the length of the cord 9) when the weight 10 is dropped from the weight mounting table 11. The vertical lever 4 is set so that it can be surely changed to the inclined posture. More specifically, since the lever 4 in the vertical posture has a resistance force to maintain the posture, the weight and the drop height of the weight 10 are set so that the lever 4 can be changed to the inclined posture exceeding the resistance force.

(Weight mount 11)
As shown in FIGS. 1 to 3, the breaker case 2 is equipped with a weight mounting table 11 on which the weight 10 is placed when there is no earthquake and which drops the weight 10 when there is an earthquake. The weight mounting table 11 has an L-shaped mounting bracket 11a and a weight mounting portion 11b on which the weight 10 is substantially mounted. The mounting bracket 11a is mounted on the surface of the breaker case 2 with a double-sided tape, a screw, a screw, an adhesive, or the like, and the weight mounting portion 11b is also mounted on the mounting bracket 11a with a screw or the like. The weight mounting portion 11b is made of a soft material such as rubber or resin, and has a recess 11c into which the lower portion of the spherical weight 10 fits. The depth and shape of the recess 11c are set so that the weight 10 falls from the weight mounting portion 11b when the weight mounting table 11 shakes at a predetermined seismic intensity (for example, seismic intensity 5) or more during an earthquake.

(Action/effect)
The above-mentioned earthquake interruption device 7 is set on the lever-embedded breaker 1 as shown in FIGS. 1 and 2. That is, the weight mounting base 11 is attached to the surface of the breaker case 2, and the pushing member (cylindrical body) 8 is supported so as to contact the rear wall 3a of the lever accommodating portion 3 and the rear surface 4a of the lever 4 in the vertical posture. The weight 10 is placed on the weight mount 11. In this state, when an earthquake occurs and the weight mounting table 11 shakes at a predetermined seismic intensity (for example, seismic intensity 5) or more, the weight 10 falls from the weight mounting table 11.

When the weight 10 falls from the weight mounting table 11 during an earthquake, the pusher supported by contacting the rear wall 3a of the lever housing 3 and the rear surface 4a of the lever 4 in the vertical posture, which are recessed in the surface of the breaker case 2. As shown in FIGS. 4(a) and 4(b), the member 8 descends between the rear wall 3a of the lever accommodating portion 3 and the back surface 4a of the lever 4, and the lever 8 is moved downward by the pushing widening member 8. The space between the rear wall 3a of the housing portion 3 and the back surface portion 4a of the lever 4 is widened, and the lever 4 is inclined as shown in FIG. 4(c). As a result, the current is cut off.

The lever 4 of the breaker 1 is not pushed down by the weight of the weight 10 as in the conventional type, but the pushing member 8 that descends by the weight of the weight 10 forms the rear wall 3a of the lever housing 3 and the rear portion 4a of the lever 4. It is rotated by widening the space. That is, the widening member 8 that descends with the weight of the weight 10 functions as a wedge that widens the space between the rear wall 3a of the lever housing portion 3 and the back surface portion 4a of the lever 4. Therefore, the lever 4 accommodated in the lever accommodating portion 3 in the vertical posture can be pivoted to the inclined posture by effectively utilizing the weight of the weight 10 acting vertically downward.

In this manner, since the widening member 8 functions as a wedge that widens the space between the rear wall 3a of the lever accommodating portion 3 and the back surface portion 4a of the lever 4, in the lever-embedded breaker 1, the lever accommodating portion 3 is provided inside the lever accommodating portion 3. By leveraging the weight of the weight, the lever 4 accommodated in the vertical posture can be efficiently tilted even with a light weight, and the power supply can be cut off in the event of an earthquake. As shown in FIG. 4C, the pushing member 8 may be detached from the lever 4 and dropped after the lever 4 is rotated in the inclined posture.

Further, as shown in FIG. 4A, the pushing member 8 includes a first contact portion 8a that contacts the rear wall 3a of the lever housing portion 3 and a second contact portion 8a that contacts the rear surface portion 4a of the lever 4 in the vertical posture. The string attachment portion 8c is disposed below the imaginary line 8d connecting the contact portion 8b, and the string attachment portion 8c located below the first contact portion 8a and the second contact portion 8b. The weight of the weight 10 is added.

As a result, when the weight of the weight 10 is applied vertically downward to the string attachment portion 8c, the pushing member 8 has a rear wall 3a of the lever accommodating portion 3 and a rear surface of the lever 4 as shown in FIG. 4B. It stably descends to and from the portion 4a. Therefore, even if the breaker case 2 is vibrating at the time of an earthquake, the widening member 8 may come off between the lever 4 and the rear wall 3a before the rotation of the lever 4 is completed. It can be prevented. Therefore, as shown in FIG. 4C, the lever 4 is reliably rotated to the tilted posture where the rotation is completed, and the energization is cut off.

Further, as shown in FIG. 4(a), the pushing member 8 has a portion 8e having an upwardly widening shape above the imaginary line 8d connecting the first contact portion 8a and the second contact portion 8b. Have. In the present embodiment, since the widening member 8 is a cylindrical body, the virtual line 8d connecting the first contact portion 8a and the second contact portion 8b is located below the diameter of the cylindrical body, and the virtual line A portion 8e having an upwardly expanding shape is formed between 8d and the diameter. When the pushing member 8 descends between the rear wall 3a of the lever accommodating portion 3 and the back surface portion 4a of the lever 4, the upwardly widening portion 8e can reliably widen the above-mentioned gap as it descends. Therefore, the lever 4 can be properly tilted.

Here, as shown in FIG. 4A, the lever 4, which is in the vertical posture, acts to maintain the vertical posture until it is rotated by a predetermined angle (for example, about 5 degrees from the vertical). When it is rotated more than the angle, it is swung downward by the force of a spring (not shown), and is tilted to the tilted posture (the posture in which the power supply is cut off) shown in FIG. 4C. Therefore, even if the size of the upwardly widened portion 8e of the widening member 8 is small in the up-down direction, the rear portion 4e of the lever accommodating portion 3 and the rear portion 4a of the lever 4 are lowered by lowering the portion 8e. The distance between and is expanded to a size where the lever 4 can be rotated by a predetermined angle, the lever 4 can be in the inclined posture shown in FIG. 4C, and the power can be reliably cut off.

(Modification)
5(a), 5(b) and 5(c) show modified examples of the present invention. The seismic isolation device according to the modified example shown in FIG. 5(a) is different from the above embodiment in the shape of the pushing member 8x and has the same configuration as the above embodiment in other respects. Only the wide member 8x will be described. The widening member 8x illustrated in FIG. 5A includes a main body 8f having a U-shaped cross section, and a pair of arms 8g extending downward from both ends of the main body 8f in the width direction. The main body 8f has a first contact portion 8a that contacts the rear wall 3a of the lever accommodating portion 3 and a second contact portion 8b that contacts the rear surface portion 4b of the lever 4 in the vertical posture. A cord attachment portion 8c to which the cord 9 is attached is provided. The arrangement of the first abutting portion 8a, the second abutting portion 8b, and the string attachment portion 8c is the same as that in the above-described embodiment, and similarly to the above-described embodiment, the pushing member 8 has an upwardly widening shape. It has a portion 8e in the shape of. The operation and effect of this modified example is similar to that of the above-described embodiment, and therefore the description thereof is omitted.

The seismic isolation device according to the modified example shown in FIG. 5(b) is different because the shape of the push member 8y is different from that of the above-described embodiment and the other configurations are similar to those of the first embodiment. Only the widening member 8y will be described. The widening member 8y shown in FIG. 5(b) has an inverted triangular cross section that is formed so as to expand upward from the surface contacting the rear wall 3a of the lever accommodating portion 3 and the surface contacting the inclined surface portion 4b of the rear surface 4a of the lever 4. 8h, and the cord attachment portion 8c is arranged at the lower portion (the portion below the imaginary line connecting the centers of the respective surfaces) of the inverted triangular portion 8h in cross section.

According to the pushing member 8y, the inverted triangular section 8h is fitted between the rear wall 3a of the lever housing section 3 and the slope section 4b of the rear section 4a of the lever 4, so that the breaker case 2 vibrates during an earthquake. Even under such a situation, the pushing member 8y does not come out of the space. Further, since the entire inverted triangle portion 8h of the cross section is the upwardly widened portion 8e, when the inverted triangle portion 8h of the cross section is lowered by the weight of the weight 10, the rear wall 3a of the lever housing portion 3 and the rear surface portion of the lever 4 are lowered. 4a can be surely widened, and the lever 4 in the vertical posture can be accurately turned to the inclined posture. The other basic effects of this modification are the same as those of the first embodiment, and therefore description thereof will be omitted.

The seismic isolation device according to the modification shown in FIG. 5C is the same as that of the first embodiment, and only the shape of the lever 4 of the breaker applied is different. The slope 4b is not formed on the upper portion of the lever 4, and the upper portion of the lever 4 is flat. The operation and effect of this modified example is similar to that of the first embodiment, and therefore its explanation is omitted. Note that the pushing member 8x shown in FIG. 5A and the pushing member 8y shown in FIG. 5B may be applied to the lever 4 shown in FIG. 5C.

FIG. 6 shows another modification. The seismic isolation device according to this modified example is different from the first embodiment in that an insertion hole 11d is formed in the mounting bracket 11a of the weight mounting table 11 and the cord 9 is inserted into the insertion hole 11d, and the others are first. The configuration is similar to that of the above embodiment. According to this structure, even if the pushing member 8 is disengaged from the lever 4 in the inclined posture during an earthquake, the pushing member 8 is caught in the insertion hole 11d, and therefore the weight 10 is separated from the breaker case 2. It can be prevented from falling, and the weight 10 can prevent the articles below the breaker case 2 from being damaged. Further, the pushing member 8 separated from the lever 4 collides with the weight mounting portion 11b, but since the weight loading portion 11b is a soft material such as rubber or resin, the impact of the pushing member 8 can be absorbed. The other basic effects of this modification are the same as those of the first embodiment, and therefore description thereof will be omitted.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, it goes without saying that the present invention is not limited to the above-described embodiments, and various modifications within the scope described in the claims. It goes without saying that examples and modifications also belong to the technical scope of the present invention. For example, the configuration of the modified example of FIG. 6 and the configurations of the modified examples of FIGS. 5A to 5C may be appropriately combined. Further, in the state of FIG. 4(a), the pushing member 8 is attached to at least one of the back surface portion 4a of the lever 4 and the rear wall 3a of the lever accommodating portion 3 by the weight of the weight 10 so as to be easily peeled off by a double-sided adhesive tape, When the breaker case 2 is vibrating at the time of an earthquake, it is possible to securely prevent the pushing member 8 from coming off between the rear surface 4a and the rear wall 3a before rotating the lever 4. May be.

The present invention is an breaker device for an earthquake breaker that tilts a lever of a breaker to shut off an electric current during an earthquake, and a lever-embedded breaker having a lever accommodated in a lever accommodating portion recessed in a surface of a breaker case. It can be used as an interruption device during an earthquake.

1 Lever Embedded Breaker 2 Breaker Case 3 Lever Housing 3a Rear Wall 4 Lever 4a Back Part 7 Earthquake Breaker 8 Push-out Member 8a First Contact 8b Second Contact 8c String Attachment 8d Virtual Line 8e Part of upward spread shape 8h Cross-section inverted triangle part 9 String 10 Weight 11 Weight mount

Claims (4)

It is applied to a lever-embedded breaker in which a lever housing that is recessed in the surface of the breaker case accommodates a lever that can rotate in a vertical position and a tilted position. An earthquake interruption device that interrupts the current as
A widening member supported in contact with a rear wall of the lever housing portion and a rear surface portion of the lever in a vertical posture,
The pushing member is lowered between the rear wall of the lever accommodating portion and the rear portion of the lever, and the gap is widened to make the lever in an inclined posture. A weight,
An apparatus for breaking a lever-embedded breaker during an earthquake, comprising: a weight placing table on which the weight is placed when there is no earthquake and drops when an earthquake occurs. The pushing member includes a first contact portion that contacts a rear wall of the lever housing portion, a second contact portion that contacts a rear surface portion of the lever in a vertical posture, and a strap attachment portion to which the strap is attached. 2. The lever embedding part according to claim 1, further comprising: and the string attachment part is arranged below an imaginary line connecting the first contact part and the second contact part. Earthquake breaker for built-in breakers. The lever-filling member according to claim 2, wherein the widening member has a portion of a shape that expands upward above an imaginary line connecting the first contact portion and the second contact portion. Earthquake breaker for built-in breakers. The push-out member has an inverted triangular cross-section formed so as to expand upward from a surface contacting the rear wall of the lever housing portion and a surface contacting the rear surface of the lever. Earthquake breaker for lever-embedded breaker.

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