Electric circuit breaker device

1. An electric circuit breaker device, comprising:

a housing made of a synthetic resin;

an igniter;

a bar-shaped projectile made of a synthetic resin;

a conductor piece forming a part of an electric circuit, the igniter, the bar-shaped projectile, and the conductor piece being disposed in this order from a first end side of the housing to an axially opposite second end side of the housing; and

a cylinder made of metal disposed between the bar-shaped projectile and an inner wall surface of the housing, wherein

a closed insulating space is formed between the second end of the housing and the conductor piece,

the conductor piece is a plate piece comprising a first connection portion and a second connection portion at opposite ends and an intermediate cutting portion, with a surface of the cutting portion being disposed orthogonal to an axial direction of the housing,

the bar-shaped projectile opposes the surface of the cutting portion of the conductor piece in the axial direction of the housing, and

a reinforcing frame, reinforcing the housing, is provided separately from the conductor piece and disposed within the housing outside of the cylinder and the insulating space, the reinforcing frame being a metallic member.

2. The electric circuit breaker device according to claim 1 , wherein:

the reinforcing frame is a quadrangle, U-shaped, or similarly shaped in plan, and has a base plate, and a first side plate and a second side plate extending in the same direction from lengthwise opposite ends of the base plate; and

the reinforcing frame is disposed to outwardly surround the insulating space and the cylinder with spacing, such that the base plate is in the second end side of the housing, and a tip end of the first side plate and a tip end of the second side plate are in the first end side of the housing.

3. The electric circuit breaker device according to claim 1 , wherein:

the reinforcing frame is a quadrangle, U-shaped, or similarly shaped in plan, and has a base plate, and a first side plate and a second side plate extending in the same direction from lengthwise opposite ends of the base plate;

the first side plate is narrowed between the base plate and the tip end to have a first recess and the second side plate is narrowed between the base plate and the tip end to have a second recess, the first recess and the second recess being formed at opposing positions; and

the reinforcing frame is disposed to outwardly surround the insulating space and the cylinder with spacing, such that the base plate is in the second end side of the housing, a tip end of the first side plate and a tip end of the second side plate are in the first end side of the housing, and further, the first connection portion and the second connection portion of the conductor piece extend across the first recess and the second recess.

4. The electric circuit breaker device according to claim 1 , wherein

the reinforcing frame and the cylinder are selected from those made of stainless steel, aluminum, and a carbon-fiber reinforced resin.

5. The electric circuit breaker device according to claim 1 , wherein

the cutting portion of the conductor piece has a fragile portion in at least one of a first surface on the first end side of the housing and a second surface on the second end side of the housing.

6. The electric circuit breaker device according to claim 1 , wherein:

the cutting portion of the conductor piece has a first fragile portion in the first surface on the first end side of the housing, and a second fragile portion in the second surface on the second end side of the housing; and

of the first surface having the first fragile portion and the second surface having the second fragile portion, the second surface has a smaller strength.

7. The electric circuit breaker device according to claim 2 , wherein

the reinforcing frame has a hole penetrating in the thickness direction in a part of the first side plate excluding the first recess, and in a part of the second side plate excluding the second recess.

8. The electric circuit breaker device according to claim 3 , wherein

the reinforcing frame has a hole penetrating in the thickness direction in a part of the first side plate excluding the first recess, and in a part of the second side plate excluding the second recess.

9. The electric circuit breaker device according to claim 2 , wherein

the reinforcing frame and the cylinder are selected from those made of stainless steel, aluminum, and a carbon-fiber reinforced resin.

10. The electric circuit breaker device according to claim 3 , wherein

the reinforcing frame and the cylinder are selected from those made of stainless steel, aluminum, and a carbon-fiber reinforced resin.

11. The electric circuit breaker device according to claim 7 , wherein

the reinforcing frame and the cylinder are selected from those made of stainless steel, aluminum, and a carbon-fiber reinforced resin.

12. The electric circuit breaker device according to claim 2 , wherein

the cutting portion of the conductor piece has a fragile portion in at least one of a first surface on the first end side of the housing and a second surface on the second end side of the housing.

13. The electric circuit breaker device according to claim 3 , wherein

the cutting portion of the conductor piece has a fragile portion in at least one of a first surface on the first end side of the housing and a second surface on the second end side of the housing.

14. The electric circuit breaker device according to claim 7 , wherein

the cutting portion of the conductor piece has a fragile portion in at least one of a first surface on the first end side of the housing and a second surface on the second end side of the housing.

15. The electric circuit breaker device according to claim 4 , wherein

the cutting portion of the conductor piece has a fragile portion in at least one of a first surface on the first end side of the housing and a second surface on the second end side of the housing.

16. The electric circuit breaker device according to claim 2 , wherein:

the cutting portion of the conductor piece has a first fragile portion in the first surface on the first end side of the housing, and a second fragile portion in the second surface on the second end side of the housing; and

of the first surface having the first fragile portion and the second surface having the second fragile portion, the second surface has a smaller strength.

17. The electric circuit breaker device according to claim 3 , wherein:

the cutting portion of the conductor piece has a first fragile portion in the first surface on the first end side of the housing, and a second fragile portion in the second surface on the second end side of the housing; and

of the first surface having the first fragile portion and the second surface having the second fragile portion, the second surface has a smaller strength.

18. The electric circuit breaker device according to claim 7 , wherein:

the cutting portion of the conductor piece has a first fragile portion in the first surface on the first end side of the housing, and a second fragile portion in the second surface on the second end side of the housing; and

of the first surface having the first fragile portion and the second surface having the second fragile portion, the second surface has a smaller strength.

19. The electric circuit breaker device according to claim 4 , wherein:

the cutting portion of the conductor piece has a first fragile portion in the first surface on the first end side of the housing, and a second fragile portion in the second surface on the second end side of the housing; and

of the first surface having the first fragile portion and the second surface having the second fragile portion, the second surface has a smaller strength.