JP4100356B2 - Circuit breaker accessory - Google Patents

Description

  The present invention provides a circuit breaker, particularly a single-pole circuit breaker equipped with a one-pole switching mechanism and an overcurrent tripping element, or a multi-pole circuit breaker in which a plurality of single-pole circuit breakers are stacked. Regarding the circuit breaker accessory that is installed and incorporates multiple switches linked to the operation of the circuit breaker, in detail, the function of this switch is to output an alarm signal indicating that the circuit breaker has tripped overcurrent. Or an auxiliary device for a circuit breaker having a function capable of switching between an auxiliary signal output indicating conduction / non-conduction of a contact of the circuit breaker.

  In a plurality of, for example, two sets of switches, each leaf spring connected to a terminal serving as a c contact output is disconnected from a fixed contact serving as a contact output or b contact output via each rotating member. According to the operation of the device, contact and separation are repeated. At this time, one of the rotating members linked to the switching mechanism of the circuit breaker or the operation handle functions as an auxiliary switch, and the other rotating member If it is connected to one rotating member, it functions as an auxiliary switch, and if it is not connected to one rotating member, it functions as an alarm switch. In the conventional circuit breaker accessory device, the function switching of the other rotating member, that is, the connecting / disconnecting with one rotating member, the switching knob that can be operated from the outside by the user is the other rotating member. And a third for transmitting the overcurrent tripping operation of the circuit breaker to the other rotating member when the other rotating member is not connected to the one rotating member. It was necessary to interpose the rotating member. (For example, see Patent Document 1. In Patent Document 1, the above-mentioned one rotating member, the other rotating member, the third rotating member, and the switching knob are respectively a rotating plate, an intermediate lever, and a display. Lever, and selector.)

European Patent Publication No. 1065691 (paragraph numbers 0012 to 0018)

  In the conventional circuit breaker accessory, the intermediate lever is connected to or disconnected from the rotating plate by fitting the through hole of the intermediate lever to the protrusion provided on the selector operated from the outside, and this protrusion is further connected to the circuit breaker. This is done by rubbing the cover and the inner wall of the base, which are the outer shell of the accessory device, and as a result, there is a drawback in that there is a concern about wear of parts due to sliding between parts. Also, when the intermediate lever is not connected to the rotating plate, that is, when the intermediate lever functions as an alarm switch, the circuit breaker status change is transmitted to this intermediate lever instead of the rotating plate, and the circuit breaker switching operation is tripped. A display lever whose operation is restricted by engaging with the operation unit is required. This display lever has a connection distance between the rotation center and the intermediate lever, the distance between the rotation center and the trip operation unit. It has a shape that is approximately twice the distance of the joint in the vertical direction. As a result, there is a problem that a large part has to be added.

  The present invention has been made to solve the above-described problems, and is a combination of two sets of auxiliary switches that do not add large parts and reduce sliding between parts as much as possible. It is an object of the present invention to obtain a circuit breaker auxiliary device capable of selecting one of a combination of a set of auxiliary switches and a set of alarm switches.

  In the circuit breaker attachment device according to the present invention, the function of the leaf spring is alarmed or released by restraining or releasing the movement of the other rotating member for moving the leaf spring by the restraining member having a simple shape. When the switching member is set to the alarm switch side, the restraining member engages with the other rotating member when the circuit breaker is in the open state, and the restraining member and the other rotation The first engagement portion with the moving member is configured to be located in the vicinity of the rotation center of the other rotation member.

As described above, the present invention is arranged on the side surface of the circuit breaker, and rotates according to the position of the switching mechanism provided in the circuit breaker or the operation handle of the circuit breaker. The rotating member, the other rotating member that follows the displacement of the one rotating member, a movable contact at one end, and the other end connected to a terminal serving as a c contact output. Two sets of fixed contacts having a pair of fixed contacts for contacting and separating the leaf springs interlocked with the rotation of the moving member and the movable contacts to output the a contact and the b contact, the one and the other rotation A pair of auxiliary switches, each of which is composed of a moving member and the leaf springs corresponding to these rotating members, letting the outside contact or non-conduction of the contact of the circuit breaker, and any one of the auxiliary switches The circuit breaker is A switching member which can function as an alarm switch to notify the outside that it has operated, if the switching member is set to the alarm switch side, when the circuit breaker is open, the other rotation In the circuit breaker attachment device comprising a restraining member that restrains the rotation of the member, the restraining member includes a first engagement portion with the other rotation member and a second engagement portion with the handle. And the first engaging portion restricts the rotation of the other rotating member and the restricting member, and the second engaging portion corresponds to the restricting member. In order to restrain the rotation restraint respectively, the second engagement portion is positioned in the vicinity of the rotation center of the restraining member, and the second engagement portion is opposite to the first engagement portion with respect to the rotation center of the restraining member. since it is configured as provided, large Without adding components, and can be obtained accessory device is reduced as much as possible the circuit breaker sliding between the parts.

  FIG. 1 is an external perspective view in which a circuit breaker accessory device (hereinafter abbreviated as an accessory device) 101 is attached to the left side surface of a single-pole circuit breaker (hereinafter abbreviated as a main body) 151, and FIGS. FIG. 2 is an internal structural view of the accessory device 101 when the cover 1 of the device 101 is removed and viewed from the direction A in FIG. 1. Specifically, FIG. 2 shows a state in which the main body 151 is closed (hereinafter abbreviated as ON), and FIG. 4 shows a trip state, FIG. 4 shows a state in which the main body 151 is open (hereinafter abbreviated as “OFF”), FIG. 5 shows a state in which the main body 151 is in an open state and the trip button is pressed when an alarm switch is set. (B) represents (a) when the auxiliary switch is set, and (b) represents when the alarm switch is set.

  In FIG. 1, when an overcurrent of the electric circuit is detected, the operation handle 51 of the well-known main body 151 and the handle 3 of the accessory device 101 are connected by a pin (not shown) that opens the opening / closing mechanism and interrupts the overcurrent. In addition, the handle 3 is interlocked with the manual ON / OFF operation of the operation handle 51. Further, the lid 52 of the main body 151 is also provided on the left side surface. By removing the lid 52 and inserting a trip cam (not shown) into the main body 151, the overcurrent tripping of the opening / closing mechanism portion of the main body 151 (not shown) is removed. The displacement of the trip cam accompanying the operation is transmitted to the latch 11 of the attachment device 101, and the attachment device 101 is in a trip state (see FIGS. 3A and 3B), like the main body 151. Since the upper side is the power supply side terminal 53 and the lower side is the load side terminal (not shown), the operation handle 51 and the handle 3 are in the OFF state (see FIGS. 4A and 4B). However, if the switching knob 5 is set to the alarm switch side (see FIG. 4B), the contact of the switch S103 is switched by pressing the trip button 4 in this state, and one end of the rotating member S28. The display unit (not shown) and the reset knob 28e provided in FIG. 5 move upward on the paper (see FIG. 5).

  2, (a) and (b) are the same except that the setting position of the switching knob 5 is different. When the operation handle 51 of the main body 151 (not shown) is turned on, the handle 3 fitted in the first protrusion 2a provided on the base 2 rotates clockwise around the first protrusion 2a. However, the follower 10 is connected to the handle 3 via the link 9 and is inserted into the third protrusion 18 c of the rotating member F 18. The clock 10 is counterclockwise around the latch pin 14 by the latch spring 17. By being restrained by the latch 11 biased in the direction, the rotating member F18 rotates counterclockwise around the latch pin 14 as a rotation center. By this rotation, the first protrusion 18a of the rotation member F18 collides with a leaf spring F20 having one end connected to a terminal F22 serving as a c contact output, and the leaf spring F20 moves rightward on the paper surface. To do. At this time, the first protrusion 2a, the link pin 12 that connects the handle 3 and the link 9, and the crack pin 13 that connects the link 9 and the crack 10 are aligned in a straight line (this is hereinafter referred to as a force line), and more When the handle 3 is rotated clockwise and the position of the link pin 12 exceeds the force line, that is, when the link pin 12 is positioned on the left side of the line connecting the first protrusion 2a and the crack pin 13 on the paper surface, the pulling is performed. The rotating member F18 is held at the position shown in the figure by the main spring F19 which is a spring. Accordingly, the switch F102, which is an auxiliary switch including the rotating member F18, the leaf spring F20, the movable contact F21, the terminal F22, the fixed contact a23, the fixed contact a24, the fixed contact b25, and the fixed contact b26, is completed. In other words, the movable contact F21 provided at the other end of the leaf spring F20 comes into contact with the fixed contact a24 provided at the fixed contact a23 serving as the a contact output, so that the main body 151 is turned on externally. An electrical signal can be output. Hereinafter, for convenience, the output of the a contact is input and the output of the b contact is open, and the switch F102 is fixed as a function of the auxiliary switch as described above. In order to distinguish from the components constituting the switch S103, the component name constituting the switch F102 is attached with the prefix F of FIXATION to the component name. In addition, the 1st protrusion part 18a produces the contact pressure with respect to the fixed contact a24 of the movable contact F21. Further, the “one rotating member” described in the claims is the rotating member F18.

  The rotation member F18 is provided with a fourth protrusion 18d. The fourth protrusion 18d is engaged with the rotation member S28 that is urged clockwise by the main spring S29 that is a pulling spring. Thus, following the rotation of the rotation member F18 in the counterclockwise direction, the rotation member S28 also rotates counterclockwise around the second protrusion 2b of the base 2 as the rotation center. By this rotation, the first protrusion 28a of the rotation member S28 collides with the leaf spring S30 having one end connected to the terminal S32 serving as the c contact output, and the leaf spring S30 moves rightward on the paper surface. Then, the rotation member S28 is held at the position shown in the drawing. Accordingly, the switch S103 including the rotation member S28, the leaf spring S30, the movable contact S31, the terminal S32, the fixed contact c33, the fixed contact c34, the fixed contact d35, and the fixed contact d36 is completed, in other words. The movable contact S31 provided at the other end of the leaf spring S30 comes into contact with the fixed contact c34 provided at the fixed contact c33 serving as the a contact output, so that an electric signal indicating that the main body 151 is ON to the outside. Can be output. In addition, the 1st projection part 28a produces the contact pressure with respect to the fixed contact c34 of movable contact S31. In addition, “the other rotating member” described in the claims refers to this rotating member S28.

  The above description shows a state where the switch S103 is set as an auxiliary switch, that is, the arrow provided on the switching knob 5 as shown in FIG. As shown in FIG. 2B, even when the alarm switch is set in which the arrow provided on the switching knob 5 is inclined 45 degrees to the right on the paper surface, as described at the beginning, there is no change in the series of operations. When the movable contact S31 comes into contact with the fixed contact c34 provided on the fixed contact c33 serving as the b contact output, the main body 151 is not tripped to the outside, that is, ON or OFF (in this case, The operation of the switch S103 is open in terms of words since the electrical signal of “ON” is output from the output of the switch F102 described above. As described above, since the switch S103 can be selected as a function of the auxiliary switch or the alarm switch, in order to distinguish it from the parts constituting the switch F102 described above, the part name constituting the switch S103, etc. The initial letter S is added. The “switching member” described in the claims refers to the switching knob 5 described above.

  Next, an operation when an overcurrent flows through the main body 151 and the main body 151 trips will be described with reference to FIG. Also in FIG. 3, (a) and (b) are the same except that the setting position of the switching knob 5 is different. As described above, with the overcurrent tripping operation of the opening / closing mechanism of the main body 151, the trip cam (not shown) protruding from the main body 151 is displaced, and in conjunction with this displacement, the latch 11 has the latch pin 14 as the center of rotation. It rotates clockwise from the position shown in FIG. Then, the lock 10 is released from the restraint, so that the holding of the rotating member F18 is released, that is, the clock 10 is counterclockwise from the position shown in FIG. 2 with the third protrusion 18c of the rotating member F18 as the rotation center. By rotating in the direction and exceeding the force line, the rotation member F18 is rotated clockwise by the main spring F19. By this rotation, the switch F102 is opened, that is, the second protrusion 18b of the rotation member F18 pushes the leaf spring F20 leftward on the paper surface, and the movable contact F21 serves as a b contact output. To output an electrical signal indicating that the main body 151 is not ON to the outside (the switch F102 is an auxiliary switch, so it cannot be determined whether the switch is tripped or OFF only). Can do. At the same time, the handle 3 and the link 9 are in a free state, but since the handle 3 is always urged counterclockwise by the handle spring 15, the handle 3 immediately rotates counterclockwise, as shown in the figure. And the scrape 10 connected to the handle 3 via the link 9 is also in the position shown in the figure while pushing up the latch 11. Here, since the latch 11 is urged counterclockwise by the latch spring 17, the crack 10 is immediately restrained by the latch 11. In addition, the 2nd projection part 18b produces the contact pressure with respect to the fixed contact b26 of the movable contact F21.

  As the handle 3 rotates counterclockwise, the trip bar 8 (see FIG. 2) engaged with the recess 3 a of the handle 3 and the first protrusion 8 a is attached clockwise by the trip bar spring 16. Therefore, it tries to rotate clockwise around the third protrusion 2c of the base 2 as the center of rotation, but before this rotation, the rotation of the aforementioned rotation member F18 in the clockwise direction. Thus, the rotation member S28, which is disengaged from the fourth protrusion 18d of the rotation member F18, is similarly rotated clockwise by the main spring S29. Therefore, the trip bar 8 is restrained by the third protrusion 28c of the rotation member S28. When the auxiliary member is set by the rotation of the rotation member S28, the switch S103 is opened, that is, the second protrusion 28b of the rotation member S28 moves the leaf spring S30 leftward on the paper surface. When the movable contact S31 is in contact with the fixed contact d36 provided on the fixed contact d35 that is the b contact output, an electric signal indicating that the main body 151 is not turned on or an alarm switch has been set. In this case, when the switch S103 is turned on, that is, when the movable contact S31 comes into contact with the fixed contact d36 provided on the fixed contact d35 that becomes the a contact output, an electrical signal indicating that the main body 151 has tripped to the outside is provided. Each can be output. The second protrusion 28b generates a contact pressure with respect to the fixed contact d36 of the movable contact S31. Further, the “second engaging portion” described in the claims means the engaging portion between the first protrusion 8a of the trip bar 8 and the concave portion 3a of the handle 3, and the “restraining member”. This is the trip bar 8.

  Further, when the rotating member S28 is rotated in the clockwise direction, the display portion 28d provided at one end of the rotating member S28 is moved down on the paper surface of the display window 2d provided in the base 2, thereby the auxiliary switch. If the alarm switch is set, it can be visually recognized from the outside that the main body 151 is not ON, that is, there is no continuity. . Thus, since the display portion 28d that can visually recognize the rotation of the rotation member S28 from the outside is provided by integral molding, the number of components is small and the configuration is simple.

  In general, when an overcurrent or the like flows through a circuit breaker and trips, an abnormality is notified to an electrical manager or the like by a lamp or buzzer via an alarm switch provided. At this time, the electrical manager etc. is investigating why the overcurrent occurred immediately, but sometimes he wants to quickly turn off the annoying buzzer, that is, to open the switch S103 immediately and reset the alarm switch There is a request. Many of the circuit breakers according to the present invention have only the ON and OFF positions of the operation handle. Therefore, the operation handle 51 of the main body 151 is rotated clockwise, that is, from FIG. 3B to FIG. 2B. Although the switch S103, which is an alarm switch, can be opened by shifting to (so-called ON operation), the ON operation without grasping the cause of the overcurrent trip is not a good idea.

  Therefore, when the alarm switch is set, the switch S103 is opened by moving the reset knob 28e provided in the vicinity of the display portion 28d of the rotating member S28 counterclockwise from the position shown in FIG. Can do. The operation leading to this opening will be described as follows. As described above, since the trip bar 8 is urged clockwise by the trip bar spring 16, when the rotation member S28 is rotated counterclockwise by the reset knob 28e, the second bar provided on the trip bar 8 is provided. The trip bar 8 rotates in the clockwise direction in combination with the fact that the projection 8b provided on the switching knob 5 does not interfere with the projection 5b. Then, the third protrusion 8c provided on the trip bar 8 enters the lower side of the third protrusion 28c of the rotation member S28 on the paper surface (see FIG. 4B described later), and the rotation member S28. Is retained. Therefore, when the switch S103 is opened, that is, when the movable contact S31 comes into contact with the fixed contact c34 provided on the fixed contact c33 that becomes the b contact output, an electric signal equivalent to the reset of the main body 151 is output to the outside. In other words, trip signal output can be stopped. Thus, since the reset knob 28e that can reset the rotating member S28 from the outside is provided by integral molding, the number of parts is reduced and the configuration is simple. The “first engagement portion” described in the claims is an engagement portion between the above-described third protrusion 8c of the trip bar 8 and the third protrusion 28c of the rotating member S28. is there.

  Subsequently, an operation from the trip state (including the above-described reset operation) to ON will be described. As described above, since the scraper 10 is restrained by the latch 11, the turning member F18 and the turning member S28 are rotated counterclockwise by the ON operation of the operation handle 51 of the main body 151 (not shown). By this rotation, as described above, the trip bar 8 is released from the restraint, so that it tries to rotate clockwise. At this time, if the auxiliary switch is set, the second protrusion 8b of the trip bar 8 collides with the protrusion 5a of the switching knob 5 as shown in FIG. Since the first protrusion 8a and the recess 3a are engaged by the clockwise rotation of the handle 3 (see FIG. 2 (a)), the trip bar 8 is slightly anti-clockwise. Returned clockwise. For this reason, the position of the trip bar 8 is almost the same in FIG. 2 (a) and FIG. 3 (a).

  When the alarm switch is set, as can be seen from FIG. 3B, the second protrusion 8b does not collide with the protrusion 5a. Although it further rotates in the clockwise direction, the first protrusion 8a and the recess 3a are engaged (see FIG. 2 (b)), so that the trip bar 8 is returned counterclockwise so that its position is 2 (b) and FIG. 3 (b) are almost the same. Further, even in the above-described reset operation, that is, in the state where the rotation member S28 has already been switched (see FIG. 4B described later), the first protrusion 8a and the recess 3a are similarly engaged, The trip bar 8 rotates counterclockwise to the position shown in FIG. Here, since the fourth protrusion 18d of the rotation member F18 continues to hold the rotation member S28 to be rotated clockwise by the main spring S29 in place of the trip bar 8, the above-described trip bar 8 counteracts. By releasing the holding of the rotation member S28 by the clockwise rotation, the rotation member S28 returns to the original state, that is, the display unit 28d does not move down on the paper surface of the display window 2d. Note that the description of the operation of the switch F102 and the switch S103 accompanying the completion of the ON operation is duplicated for both the auxiliary and alarm switch settings, and therefore will be omitted.

  Next, an operation associated with the OFF operation of the operation handle 51 of the main body 151 (not shown) will be described with reference to FIG. When the handle 3 is rotated counterclockwise and exceeds the force line, the holding of the rotating member F18 is released, the rotating member F18 is rotated clockwise by the main spring F19, and the movable contact F21 becomes the b contact output. Electricity to the effect that the main body 151 is not turned on externally (the switch F102 is an auxiliary switch, so this switch alone cannot be used to determine whether it is tripped or turned off) by contacting the fixed contact b26 provided on the fixed contact b25. Signals can be output in the same manner as in (a) and (b). At this time, since the scrape 10 moves while being restrained by the latch 11, the positions of the scrape 10 and the latch 11 at the time when the OFF operation is completed are not different from those in FIG. Thus, the series of operations of the switch F102 is the same for both (a) and (b).

  On the other hand, since the operation of the switch S103 varies depending on the setting of its function, each will be described. As described above, the trip bar 8 starts to rotate clockwise in conjunction with the counterclockwise rotation of the handle 3 (see FIGS. 2A and 2B). Here, if the auxiliary switch is set, the second protrusion 8b of the trip bar 8 interferes with the protrusion 5a of the switching knob 5 as shown in FIG. The rotation of the rotation member S28 rotated clockwise by the main spring S29 is prevented by preventing the rotation in the clockwise direction and releasing the holding of the rotation member S28 by the rotation of the rotation member F18 in the clockwise direction. The trip bar 8 is slightly returned in the counterclockwise direction by the third protrusion 28c, and is almost in the same position as in FIG. By the rotation of the rotating member S28, the switch S103 is opened, that is, the movable contact S31 comes into contact with the fixed contact d36 provided in the fixed contact d35 that outputs the b contact, so that the main body 151 is also turned on externally. It is possible to output an electrical signal indicating that it is not. However, FIG. 4 (a) is exactly the same as FIG. 3 (a) except for the presence or absence of restraint of the cracker 10 in the OFF operation process. As shown in FIG. 4A, the latch 11 is sandwiched between the rotating member F18 and the side plate 27. This is the same in other drawings (excluding FIG. 1) other than FIG. However, in order to make it easy to understand the movements of the cracks 10 and the latches 11, the display is omitted except for FIG.

  When the alarm switch is set, as shown in FIG. 4 (b), the second protrusion 8b does not interfere with the protrusion 5a, so that the trip bar 8 further rotates clockwise. to continue. Then, the rotation member S28 that has been released from holding is also rotated clockwise by the rotation of the rotation member F18, but before this rotation, on the paper surface of the third protrusion 28c, Since the third protrusion 8c of the trip bar 8 enters and engages with the lower part, the rotation member S28 does not rotate any more. Although the rotation member S28 is slightly rotated clockwise as described above, since the sufficient contact pressure is applied to the movable contact S31 by the first protrusion 28a, the movable contact S31 is the b contact. Without being separated from the fixed contact c34 provided in the fixed contact c33 serving as an output, the switch S103 continues to be opened, that is, the electric signal indicating that the main body 151 has not tripped outside is continuously output. It is possible to know that the main body 151 is turned off by manual operation together with the signal output indicating that the switch F102 is not conducting.

  As described above, the rotating member S28, which can be used for both the auxiliary and alarm switches, can be used in an OFF operation at the time of setting an alarm switch without changing the center of rotation, or during an ON operation and a trip. The restraint is released only by the trip bar 8. Moreover, the interlocking with the handle 3 essential for restraining the rotation member S28 has a simple shape, specifically, the first protrusion 8a and the first protrusion 8a arranged in the vicinity of the left and right directions from the rotation center of the trip bar 8. With the three protrusions 8c, the movement of the handle is smoothly transmitted to the rotating member S28 while reducing the sliding between the parts as much as possible. Furthermore, the trip bar 8 is restrained by the switching knob 5 having a simple shape when the auxiliary switch is set. Therefore, it is possible to obtain a switch having a simple configuration with a small number of parts and a relatively high reliability in terms of the number of endurance without adding large parts. Also, as can be seen from FIG. 4B, the OFF operation at the time of setting the alarm switch is the only movement of the leaf springs F20 and S30, but at this time, the two contact springs are arranged by arranging the b contact output inside. Therefore, the degree of freedom of design for the fixed contact is improved.

  By the way, to confirm whether the notification means such as a lamp or a buzzer circuit (not shown) connected to the terminals 6a to 6c of the switch F102 and the terminals 7a to 7c of the switch S103 (see FIG. 5) functions reliably. If it is an auxiliary switch, the main body 151 may be simply turned on and off. However, in the case of an alarm switch, since many circuit breakers equipped with the accessory device of the present invention do not have a trip button, an overcurrent may actually be passed through the circuit breaker for confirmation. Though possible, this idea is not very realistic. Therefore, the main body 151 at the time of setting the alarm switch, in which the bar portion 8d connecting the rotation center of the trip bar 8 and the third protrusion 8c is only parallel to the design surface 2e of the base 2 (see also FIG. 1). A confirmation method will be described with reference to FIG.

  A trip button 4 is provided between the handle 3 and the display window 2d. As described above, when the bar portion 8d is substantially parallel to the design surface 2e (see FIG. 4B), the trip button 4 is By pushing downward on the paper surface, the trip bar 8 rotates counterclockwise. Then, the rotation member S28 urged clockwise by the main spring S29 is rotated clockwise because the restraint by the third protrusion 8c of the trip bar 8 is released. Therefore, the display portion 28d provided at one end of the rotating member S28 moves downward on the paper surface of the display window 2d provided in the base 2, and the switch S103 is turned on, that is, the movable contact S31 is output as the contact a. By contacting the fixed contact d36 provided in the fixed contact d35, an electrical signal equivalent to the trip of the main body 151 can be output to the outside, and the function of the notification means can be easily confirmed. . Therefore, by utilizing the trip bar 8, a simulated trip (trip function) can be realized without adding special parts, and the trip bar 8 and the trip button 4 are arranged on the left side of the paper of the handle 3. As a result, the trip button 4 can be operated smoothly. The trip button spring 37 urges the trip button 4 upward in the drawing, so that if the trip button 4 is stopped, the trip button 4 returns to the original position. Is exactly the same as FIG. Therefore, descriptions of the reset operation and the ON operation after this operation are duplicated and will be omitted.

  As described above, as shown in FIG. 1, the attachment device 101 is attached to the left side surface of the main body 151 as described above. However, as can be seen from FIG. 1, the lid 52 is also provided on the right side surface. The right side surface of the main body 151 may be attached, and although not shown, a plurality of attachment devices 101 can be stacked on both the left side surface and the right side surface by inserting a trip cam into the attachment device 101.

  The convenience of the switching knob 5 is improved by leaving the selection of the auxiliary switch or the alarm switch to the user side. However, the switching can be always operated by attaching the right side surface of the accessory device 101 described above. For users who want to prevent the knob 5 from being operated incorrectly or who require two sets of auxiliary switches or a combination of one set of auxiliary switches and one set of alarm switches, the manufacturer sets the switching knob 5 and then covers 1 Even a so-called non-selective accessory device, which cannot be set by the user by sealing with, does not depart from the scope of the present invention. In addition, as an accessory device of the circuit breaker, for example, the members constituting the switch F102 excluding the rotating member F18 are removed, and the accessory device having only one set of auxiliary switches or only one set of alarm switches, or For example, an auxiliary device having only one set of auxiliary switches by removing the members constituting the switch S103 may be used.

It is an external appearance perspective view which attached the attachment apparatus which shows embodiment of this invention to the main body. It is an internal structure figure of the attachment device in the main body which shows an embodiment of this invention, (a) is at the time of auxiliary switch setting, and (b) is at the time of alarm switch setting. The main body which shows embodiment of this invention is an internal structure figure of the attachment apparatus in a trip state, (a) is at the time of an auxiliary switch setting, (b) is at the time of an alarm switch setting. It is an internal structure figure of an attachment device in the state where a main part showing an embodiment of this invention is in an OFF state, (a) at the time of auxiliary switch setting, (b) at the time of alarm switch setting. In FIG.4 (b), it is an internal structure figure of the attachment apparatus at the time of trip button pushing.

Explanation of symbols

2 base, 2b second protrusion, 2c third protrusion, 3 handle,
3a recess, 4 trip button, 5 switching knob, 5a protrusion,
8 Trip bar, 8a 1st protrusion, 8b 2nd protrusion,
8c Third projection, 8d Bar, 14 Latch pin,
16 Trip bar spring, 18 Rotating member F, 18d Fourth protrusion,
21 movable contact F, 24 fixed contact a, 26 fixed contact b, 28 rotating member S,
28c third protrusion, 28d display, 28e reset knob,
31 movable contact S, 34 fixed contact c, 36 fixed contact d, 101 accessory device,
102 switch F, 103 switch S.

Claims (9)

One rotating member that is disposed on the side of the circuit breaker and rotates according to the position of the opening / closing mechanism provided in the circuit breaker or the operation handle of the circuit breaker, and the one rotation The other rotating member that follows the displacement of the member, and a movable contact at one end, the other end being connected to a terminal that becomes a c contact output, each interlocking with the rotation of the one and the other rotating members. Corresponding to two sets of fixed contacts having a pair of fixed contacts for contacting and separating the leaf spring and the movable contact and outputting the a contact and the b contact, the one and the other rotating members, and the rotating members The circuit breaker trips overcurrent from either one of the two sets of auxiliary switches and the auxiliary switches that are made up of the leaf springs that inform the outside of the circuit breaker contacts between conduction and non-conduction. Let the outside know that it worked A switching member that can function as an alarm switch, and a restraining member that restrains the rotation of the other rotating member when the circuit breaker is open when the switching member is set on the alarm switch side. In the circuit breaker accessory device with
The restraining member is provided with a first engaging portion with the other rotating member and a projection portion forming a second engaging portion with the handle, and the first engaging portion And the second engaging portion are positioned in the vicinity of the center of rotation of the restraining member in order to restrain the restraining of the turning of the restraining member. In addition, the circuit breaker attachment apparatus, wherein the second engagement portion is provided on the opposite side of the first engagement portion with respect to the rotation center of the restraining member. When four fixed contacts are arranged on a substantially straight line and the switching member is set to the alarm switch side, the two outer fixed contacts are a contact outputs and the two inner fixed contacts are b contact outputs. The circuit breaker attachment device according to claim 1, wherein the circuit breaker attachment device is configured as follows. When the switching member is set to the auxiliary switch side, the protrusion provided on the switching member restrains the rotation of the restraining member when the circuit breaker is in the open state, and the restraining member is connected to the other turning member. The circuit breaker attachment device according to claim 1, wherein the circuit breaker attachment device is not engaged. The circuit breaker attachment device according to claim 3, wherein the rotation center of the other rotation member is configured to be the same when the auxiliary switch is set and when the alarm switch is set. One rotating member is disposed at a position facing the lower side of the handle and the other rotating member, and a restraining member is disposed between the one rotating member and the other rotating member. The circuit breaker attachment device according to claim 3, wherein the circuit breaker attachment device is provided. A trip button for rotating the restraining member from the outside is provided, and when the restraining member is engaged with the other turning member, the other turning member is turned by pushing the trip button. 6. The circuit breaker attachment apparatus according to claim 5, wherein the restraining member and the trip button have a trip function. 4. The circuit breaker attachment device according to claim 3, wherein the other rotating member is provided with a display unit that can visually recognize the rotation caused by the interlocking with the one rotating member from the outside. 8. The configuration according to claim 7, wherein when the switching member is set on the alarm switch side, the other rotating member rotated by the reset unit provided in the display unit can be reset from the outside. Attached device of the circuit breaker described. 4. The circuit breaker attachment apparatus according to claim 3, wherein the switching member cannot be operated from the outside.

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