JP6134959B2 - Circuit breaker for wiring - Google Patents

Description

  The present invention relates to a circuit breaker for wiring having an opening / closing mechanism that presses a crossbar via a pin formed by bending a wire to form a shaft portion and a bearing member that passes through the shaft portion of the pin. It is.

  As an open / close mechanism of a circuit breaker for wiring, as in Patent Document 1, a shaft portion is formed by bending an end portion of a wire between a handle for opening and closing a contact and a bearing member that operates in conjunction with the operation of the handle. There is disclosed a technique in which the pins are connected by a substantially U-shaped pin formed.

  However, when the end portion of the pin is bent into a substantially U-shape to form the shaft portion 101 as shown in FIG. 6, a bent bulge portion 103 is generated inside the bent portion 102, and thus the bearing member 104. Is inserted to the bent bulge portion 103, the bearing member 104 may be caught by the bent bulge portion 103, and the rotation of the bearing member 104 relative to the pin 105 may be hindered. In order to avoid this, the distance between the bearing member and the bent bulge portion may be increased, but the lateral width of the product is increased. Moreover, in order to suppress a lateral width, it can also be set as the structure which forms a crushing part in the lateral width direction of a pin, However, Processing cost will start. Furthermore, in a structure in which a thin plate is provided between the bearing member and the bent bulge portion to prevent catching, there is a problem that the number of parts is increased and the cost is similarly increased.

JP 2006-236874 A

  The object of the present invention is to solve the above-mentioned conventional problems, and to provide a circuit breaker for wiring that can smoothly rotate a bearing member with respect to a pin without increasing the number of parts, the number of processes, and the width of the product. Is to provide.

  The present invention made in order to solve the above-mentioned problems is a circuit breaker provided with an opening / closing mechanism for opening / closing a contact, wherein the opening / closing mechanism includes a pin formed by bending a wire and forming a shaft portion, and the pin The bearing member includes a coupling portion having a substantially U-shaped cross section in which a hole portion through which the shaft portion is inserted is formed in both arm portions, and the hole Among the portions, the diameter of the hole on the side containing the bent bulge portion generated inside by bending of the pin is larger than the diameter of the other hole.

  According to a second aspect of the present invention, in the circuit breaker according to the first aspect, the hole portions are formed by aligning the outer positions of the shaft portions of the pins.

  According to a third aspect of the present invention, there is provided a circuit breaker having an opening / closing mechanism for opening / closing a contact, wherein the opening / closing mechanism includes a pin formed by bending a wire to form a shaft portion, and a bearing connected to the pin. The bearing member includes a connecting portion having a substantially U-shaped cross section in which the hole portion through which the shaft portion is inserted is formed in both arm portions, and the hole portion includes the pin By tilting the hole on the side containing the bent bulge portion that is generated inside by bending, the diameter is larger than the diameter of the other hole.

  The circuit breaker according to the present invention includes a coupling portion having a substantially U-shaped cross section in which a shaft portion is inserted in both arm portions in a bearing member, The diameter of the hole on the side including the bent bulge portion generated inside by bending was larger than the diameter of the other hole. Thereby, when connecting a pin and a bearing member, a bearing member can be smoothly rotated with respect to a pin, without increasing the number of parts, the number of processes, the lateral width of a product, etc.

It is a front view of the ON state which shows the opening-closing mechanism of embodiment of this invention. It is a front view of the OFF state which shows the opening-closing mechanism of embodiment of this invention. It is a figure which shows the latch and pin of embodiment of this invention. It is an enlarged view at the time of inserting a pin into the latch of the embodiment of the present invention. It is an enlarged view which shows other embodiment of this invention. It is an enlarged view at the time of inserting a pin in the conventional bearing member.

Preferred embodiments of the present invention are shown below.
In FIG. 1, a power distribution breaker includes a terminal 1, a movable contact 2 and a fixed contact 3 that open and close the contact, a switching mechanism that drives the movable contact 2, and a contact when an overcurrent flows. And a trigger 4 serving as a shut-off mechanism for performing tripping. The opening / closing mechanism includes a handle 5 for switching on and off, a pin 6 connected to the handle 5, a latch 7 as a bearing member connected to the pin 6, and a crossbar 8 positioned below the latch 7. Is.

  The handle 5 is formed with an extending portion 9 extending obliquely downward from the axis of the handle 5, and a handle connecting hole portion 10 is formed at the tip thereof. The pin 6 is a member for connecting the handle 5 and the latch 7 as shown in FIG. 1 and FIG. 3, and the end portion of the metal wire is bent into a substantially U shape to form the shaft portion 18. Yes, the upper end is pivotally attached to the handle connecting hole 10, and the lower end is pivotally attached to the latch connecting hole 11. The latch 7 is made of metal and includes a connecting portion 12 having a substantially U-shaped cross section for connecting to the pin 6 as shown in FIGS. 1 and 3. Further, a crossbar 8 is positioned below the latch 7, and the movable contact 2 is positioned below the crossbar 8.

  As shown in FIG. 3, the pin 6 is formed to be bent in a substantially U-shaped cross section, so that a bent swollen portion 13 is formed inside the bent portion 17. The latch 7 connected to the pin 6 includes a connecting portion 12 having a substantially U-shaped cross section as shown in FIG. 3, and the shaft portion 18 of the pin 6 is inserted into both arms thereof. A latch connection hole 11 is formed. Furthermore, the outer diameter of the latch connection hole portion 11 on the side including the whole or a part of the bent bulge portion 13 of the pin 6 is formed to be larger than the outer diameter of the other latch connection hole portion 11. . Thereby, rotation with respect to the pin 6 of the latch 7 can be made smooth, without increasing the number of parts, the number of processes, and the width of the product. Further, by not enlarging the other latch connecting hole portion 11, rattling between the pin 6 and the latch 7 can be minimized.

  In addition, as shown in FIG. 4, it is more preferable to form the latch connection hole portions 11 by aligning the outer positions of the shaft portions 18 of the pins 6.

  As another embodiment, the diameter of the latch connection hole portion 11 is increased toward the opening side where the shaft portion 18 of the pin 6 is inserted in the latch connection hole portion 11 on the side including the bent bulge portion 13 of the pin 6. It is good also as what is provided with the inclination part 14 expanded rather than the diameter of the other latch connection hole part 11 by making it incline in this way. The inclined portion 14 may be at least above the latch connecting hole portion 11. In addition, the latch connecting hole portion 11 may have a shape that prevents the bent bulge portion 13 from hindering the rotation of the latch 7 when the shaft portion 18 of the pin 6 is inserted into the latch 7.

  In the circuit breaker configured as described above, when the contact is closed, the pin 6 is moved downward by the operation of the handle 5, and the latch connection hole portion 11 is rotated with respect to the pin 6, Move down. As a result, the cross bar 8 positioned below the latch 7 is pressed downward, and the cross bar 8 presses the movable contact downward, so that the movable contact 15 of the movable contact 2 and the fixed contact 16 of the fixed contact 3 are fixed. Is brought into the on state shown in FIG.

  When the contact is opened, the pin 6 is moved upward by the operation of the handle 5, and the latch connection hole portion 11 is moved upward while rotating with respect to the pin 6. The pressure applied to the crossbar 8 is released and the crossbar 8 is lifted, and the movable contact 15 of the movable contact 2 and the fixed contact 16 of the fixed contact 3 are dissociated to enter the OFF state shown in FIG.

  In addition, the latch 7 is locked with a trigger 4 as a shut-off mechanism, and when the trigger 4 is activated due to an overcurrent, the latch 7 and the trigger 4 are unlocked and are always urged in the opening direction. The pressed crossbar 8 is released, and the movable contact 15 of the movable contact 2 and the fixed contact 16 of the fixed contact 3 are dissociated.

  The latch 7 is not limited to the position and function of the present embodiment as long as the latch 7 is pivotably connected to the pin 6 in the opening / closing mechanism, and the latch 7 is locked to the trigger 4. The structure which was made into another member without including a location may be sufficient. In the present embodiment, one end of the pin 6 is connected to the handle 5, but the present invention is not limited to this, and the structure that is rotatably connected to the other opening / closing mechanism, or only the other end of the pin 6 is the opening / closing mechanism. It is assumed that the present invention can also be applied to a structure that is rotatably connected to the frame.

DESCRIPTION OF SYMBOLS 1 Terminal part 2 Movable contact 3 Fixed contact 4 Trigger 5 Handle 6 Pin 7 Latch 8 Cross bar 9 Extension part 10 Handle connection hole part 11 Latch connection hole part 12 Connection part 13 Bending swelling part 14 Inclination part 15 Movable contact 16 Fixed Contact point 17 Bending portion 18 Shaft portion 101 Shaft portion 102 Bending portion 103 Bending swelling portion 104 Bearing member 105 Pin

Claims (3)

A circuit breaker having an open / close mechanism for opening and closing a contact,
The opening / closing mechanism includes a pin formed by bending a wire to form a shaft portion, and a bearing member connected to the pin,
The bearing member includes a connecting portion having a substantially U-shaped cross-section in which a hole portion through which the shaft portion is inserted is formed in both arms.
The circuit breaker for wiring, wherein a diameter of a hole including a bent bulge portion generated inside by bending of the pin among the holes is larger than a diameter of the other hole.   The circuit breaker according to claim 1, wherein the hole portions are formed by aligning the outer positions of the shaft portions of the pins. A circuit breaker having an open / close mechanism for opening and closing a contact,
The opening / closing mechanism includes a pin formed by bending a wire to form a shaft portion, and a bearing member connected to the pin,
The bearing member includes a connecting portion having a substantially U-shaped cross-section in which a hole portion through which the shaft portion is inserted is formed in both arm portions, respectively.
The circuit breaker for wiring, wherein the hole portion is larger than the diameter of the other hole portion by inclining the hole portion on the side containing the bent bulge portion generated inside by bending the pin.