JP2013222666A - Electric power distribution apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric power distribution apparatus which can prevent damage to a member caused by over-running when a movable electrode is opened, and can be downsized.SOLUTION: A multi-circuit switch comprises: a fixed electrode; and a movable electrode 20 which is rotatable with respect to the fixed electrode, both electrodes are contact with each other when the movable electrode 20 is rotated toward an input direction, and both electrodes are spaced when the movable electrode 20 is rotated toward an opening direction. In the multi-circuit switch, the movable electrode 20 comprises: a first abutting part 29 rotatably mounted to an upper side connection terminal 23, formed on the upper side connection terminal 23 and abutting to the movable electrode 20; and a buffer member 40 mounted to the upper side connection terminal 23 and having a second abutting part 43 abutting to the movable electrode 20, and when the movable electrode 20 is rotated toward the opening direction, the rotation of the movable electrode 20 is regulated at an opening regulation position by abutting the first abutting part 29 and the second abutting part 43 to the movable electrode 20.

Description

  The present invention relates to power distribution equipment such as circuit breakers and switches.

  Power distribution equipment such as a circuit breaker and a switch includes a fixed electrode and a movable electrode that is energized by being brought into contact with the fixed electrode. The movable electrode is rotatably supported. The power distribution device brings the movable electrode into contact with the fixed electrode by rotating the movable electrode in the closing direction, and separates the movable electrode from the fixed electrode by rotating the movable electrode in the opening direction. Thereby, the power distribution apparatus opens and closes the electric circuit. The movable electrode is set to a predetermined open position (set open position) when opened.

  However, the movable electrode may cause a so-called overrun that passes the set open position when rotating in the open direction due to deflection or dimensional error of components or cases of power distribution equipment. And when a movable electrode overruns, there exists a possibility that a movable electrode may contact components, such as a supporting member, and may be damaged, respectively. Therefore, in order to suppress damage due to this overrun, a power distribution device in which a buffer member is provided on an insulating barrier has been proposed (see, for example, Patent Document 1). In the power distribution device, since the buffer member is positioned in the opening direction of the movable electrode, the buffer member prevents the movable electrode from moving and prevents overrun.

JP 2002-75135 A

  By the way, in recent years, there is a tendency for power distribution devices to be miniaturized. In the power distribution device described in Patent Document 1, it is necessary to secure an insulation distance between the ground and the size reduction is difficult. Therefore, there has been a demand for a power distribution device that can be miniaturized while suppressing damage to members due to overrun when the movable electrode is opened.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a power distribution device that can be reduced in size while suppressing damage to members due to overrun when the movable electrode is opened.

Hereinafter, means for achieving the above-described object and its operation and effects will be described.
The invention according to claim 1 has a fixed electrode and a movable electrode that is rotatable with respect to the fixed electrode, and when the movable electrode is rotated in the closing direction, the two electrodes are brought into contact with each other, and In a power distribution device that separates both electrodes when the movable electrode is rotated in the opening direction, the movable electrode is rotatably attached to the conductive member, is formed on the conductive member, and the movable electrode contacts A contact portion and a buffer member formed on the conductive member and formed with a second contact portion that contacts the movable electrode, and when the movable electrode is rotated in the opening direction, The gist of the invention is to restrict the rotation of the movable electrode by contacting the movable electrode with the first contact portion and the second contact portion.

  According to this configuration, the rotation of the movable electrode can be restricted at the opening restriction position by the first contact part formed on the conductive member and the second contact part formed on the buffer member. Moreover, since the first contact portion is mounted on the conductive member and the buffer member is mounted on the conductive member, the distribution device can be reduced in size without affecting the physique of the distribution device. Therefore, it is possible to reduce the size while suppressing damage to the member due to overrun when the movable electrode is opened.

Furthermore, since the rotation of the movable electrode is restricted in the vicinity of the rotation axis of the movable electrode, it is possible to receive an impact of the movable electrode at a portion where the moving speed is slow and to suppress deterioration of the contact portion.
The invention according to claim 2 is the power distribution device according to claim 1, wherein the conductive member is formed of an inelastic member, and the buffer member is formed of an elastic member.

  According to this configuration, the rotation of the movable electrode can be reliably restricted by the first contact portion formed by the inelastic member, and the contact of the movable electrode can be performed by the second contact portion formed by the elastic member. It can absorb the impact caused by contact.

The gist of the invention according to claim 3 is that, in the power distribution device according to claim 1 or 2, the first abutting portion and the second abutting portion abut simultaneously with the movable electrode. .
According to this configuration, since the first contact portion and the second contact portion are in contact with the movable electrode simultaneously, it is possible to simultaneously absorb the impact on the movable electrode by the conductive member and the buffer member.

  According to a fourth aspect of the present invention, in the power distribution device according to the first or second aspect, the first abutting portion and the second abutting portion correspond to the movable electrode and the second abutting portion. The gist is that the movable electrode and the first contact portion come into contact after contact.

  According to this configuration, since the movable electrode contacts the second contact portion first, and then the movable electrode contacts the first contact portion, the conductive member and the buffer member further absorb the impact with the movable electrode. can do.

  According to a fifth aspect of the present invention, in the power distribution device according to any one of the first to fourth aspects, the buffer member is in contact with the movable electrode and is the same as the contact surface of the first contact portion. A third abutting portion formed with an abutting surface formed on the extension; and when the movable electrode is rotated in the opening direction, the first abutting portion, the second abutting portion, and the The gist is to restrict the rotation of the movable electrode by contacting the movable electrode with the third contact portion.

  According to this configuration, the rotation of the movable electrode can be restricted at the opening restriction position by the third contact part together with the first contact part and the second contact part. The contact surface of the first contact portion and the contact surface of the third contact portion are formed on the same extension. For this reason, the 1st contact part of a conductive member and the 3rd contact part of a buffer member will contact | abut with a movable electrode similarly, and the impact with a movable electrode is reliably absorbed with a conductive member and a buffer member. be able to.

  According to a sixth aspect of the present invention, in the power distribution device according to any one of the first to fifth aspects, the corner portion of the support member that supports the conductive member is located on the back side of the contact surface of the buffer member. That is the gist.

  According to this configuration, the corner portion of the support member that supports the conductive member is located on the back side of the portion of the buffer member that contacts the movable electrode, so that the impact caused by the contact of the movable electrode is absorbed by the corner portion of the support member. can do.

  The invention according to claim 7 is the power distribution device according to any one of claims 1 to 6, wherein a groove is formed in a support member that supports the conductive member, and the buffer member covers the conductive member. At the same time, the gist of the invention is to fit and adhere to the groove.

  According to this configuration, the impact when the movable electrode comes into contact with the second contact portion can be dispersed and absorbed by the conductive member and the support member. Moreover, since the buffer member is fitted into the groove formed in the support member, the buffer member can be accommodated in the physique of the support member. Therefore, it can suppress that a physique increases by adding a buffer member.

  ADVANTAGE OF THE INVENTION According to this invention, in a power distribution apparatus, size reduction can be performed, suppressing the damage of the member by the overrun at the time of open | release of a movable electrode.

The figure which shows the internal structure of the multicircuit switch which installed the buffer member. The side view which shows an electroconductive member and a buffer member. The figure which shows contact | abutting with a movable electrode and a buffer member. The figure which shows an electrically-conductive member and a buffer member. The figure which shows contact | abutting with a movable electrode and a buffer member. The figure which shows contact | abutting with a movable electrode and a buffer member. The figure which shows the internal structure of the switch provided with the buffer member.

Hereinafter, an embodiment in which a power distribution device according to the present invention is embodied as a multi-circuit switch will be described with reference to FIGS.
As shown in FIG. 1, the multi-circuit switch has a plurality of circuit switching units 10 arranged in parallel. Here, only one circuit is shown. The circuit opening / closing part 10 is supported by a box-shaped main body case 11.

  Between the side plates of the main body case 11, an upper support plate 12 and a lower support plate 13 are installed on the upper side and the lower side, respectively. An upper support member 21 that supports the movable electrode 20 is fixed to the upper support plate 12 with bolts (not shown). A lower support member 31 that supports the fixed electrode 30 is fixed to the lower support plate 13 with bolts (not shown). Both support members 21 and 31 are formed of a synthetic resin material having insulation and strength.

  A housing recess 21 a for housing the upper connection terminal 23 as a conductive member is formed at the lower end side central portion of the upper support member 21. The upper connection terminal 23 is fixed to the upper end portion of the upper support member 21 so that the lower end portion protrudes into the storage recess 21a. The upper connection terminal 23 is formed of an inelastic member that is a conductive metal. A movable electrode 20 is rotatably supported by a rotation shaft 24 at the lower end portion of the upper connection terminal 23. An arc resistant metal 20 c is fixed to the lower end of the movable electrode 20.

  As shown in FIG. 2, the movable electrode 20 includes two contact blades 20 a and 20 b, and the two contact blades 20 a and 20 b are attached with the upper connection terminal 23 interposed therebetween. The two contact blades 20a and 20b are urged toward the side where the contact blades 20a and 20b come close to each other while the interval between the contact blades 20a and 20b is set by the regulating member 26.

As shown in FIGS. 2 and 3, an insulating barrier 28 that insulates the same phase is attached to the movable electrode 20 on the fixed electrode 30 side, which will be described later, by a fixed shaft 28a.
As shown in FIG. 1, a metal main shaft 14 is rotatably mounted on the upper portion of the main body case 11. A drive lever 15 is fixed to the main shaft 14. The drive lever 15 rotates on the main shaft 14. A main shaft 14 is connected to a base end portion of the drive lever 15, and an operation link 17 is rotatably connected to a distal end portion of the drive lever 15 by a connecting shaft 16. The movable electrode 20 is rotatably connected to the distal end portion of the operating link 17. That is, when the driven lever connected to the connecting shaft 16 is operated, the connecting shaft 16 moves, so that the movable electrode 20 is rotated by the link mechanism including the drive lever 15 and the operating link 17.

  The upper end portion of the upper connection terminal 23 is exposed on the upper surface of the upper support member 21. A conductive metal common bus 25 is fixed to the upper end of the upper support member 21 with bolts 22. The common bus 25 extends in a straight line in the direction connecting the circuit opening / closing sections 10.

  On the other hand, an accommodation recess 31 a for accommodating the lower connection terminal 33 is formed in the upper end side central portion of the lower support member 31. The lower connection terminal 33 is fixed to the lower end portion of the lower support member 31 so that the upper end portion protrudes into the storage recess 31a. The upper end portion of the lower connection terminal 33 functions as the fixed electrode 30. The width of the fixed electrode 30 is set slightly longer than the interval (separation distance) between the two contact blades 20a and 20b. The two contact blades 20a and 20b are clamped with the fixed electrode 30 at a predetermined contact position when they are inserted. At this time, the two contact blades 20a and 20b are set to contact the fixed electrode 30 with a predetermined contact surface pressure. An arc-resistant metal 30a is fixed to the fixed electrode 30 at a portion that first contacts the movable electrode 20 at the time of charging.

  An arc extinguishing device 18 is attached to the upper portion of the lower support member 31. In the arc extinguishing device 18, a plurality of magnetic plates stacked at predetermined intervals along the rotation direction of the movable electrode 20 are supported by a support member. The magnetic plate has a U-shaped notch through which the movable electrode 20 passes. The arc extinguishing device 18 can extinguish the arc between the movable electrode 20 and the fixed electrode 30 when the movable electrode 20 changes from the input state to the open circuit state.

  A lower end portion of the lower connection terminal 33 has a connection conductor 34 fixed by a bolt 32 and is connected via a connection conductor 34 to a bushing (not shown) protruding from the lower front surface of the main body case 11.

  As shown in FIGS. 2 and 3, a first contact portion 29 that contacts the movable electrode 20 at the open restriction position is formed in the vicinity of the rotation shaft 24 of the upper connection terminal 23. The first contact portion 29 is formed to be wider than the lateral width of the portion of the upper connection terminal 23 where the rotation shaft 24 is located and slightly wider than the distance between both the outer edges of the two contact blades 20a and 20b. The first contact portion 29 is formed to be inclined rearward. The first abutting portion 29 abuts on the first abutting portion 20 d which is a back surface portion of the movable electrode 20 in the vicinity of the rotating shaft 24.

  In addition, the upper support member 21 is provided with a buffer member 40 that contacts the movable electrode 20 in the opening restriction position at the opening restriction position. The buffer member 40 is formed of an insulating and elastic resin material.

  The buffer member 40 includes an attachment portion 41 that extends along the upper connection terminal 23 and is attached to the upper portion of the upper connection terminal 23, and a fitting portion 42 that fits into the groove portion 21 b formed in the upper support member 21. ing. The attachment portion 41 is fixed to the upper connection terminal 23 by two bolts 45. The fitting portion 42 is fitted into the groove portion 21 b of the upper support member 21 and is in close contact with the upper support member 21. And the rear-end part 42a of the fitting part 42 and the rear-end part 21c of the groove part 21b are contact | abutted. The attachment part 41 and the fitting part 42 of the buffer member 40 are stepped, and the fitting part 42 is farther from the upper connection terminal 23 than the attachment part 41. And between the attachment part 41 and the fitting part 42, the 2nd contact part 43 which contact | abuts the movable electrode 20 in an open control position is provided. An inclined portion 46 is formed below the second contact portion 43. The second contact portion 43 and the inclined portion 46 are formed in a two-step shape. The inclined portion 46 is formed to be inclined on the same extension as the contact surface of the first contact portion 29. The contact surface of the inclined portion 46 and the contact surface of the second contact portion 43 are formed in parallel. A second contact portion 20 e that is a back surface portion adjacent to the upper portion of the first contact portion 20 d of the movable electrode 20 contacts the upper portion of the second contact portion 43. On the back side of the back surface of the second contact portion 43, the corner portion 21 d of the upper support member 21 is located. The movable electrode 20 is set at a predetermined set release position, and in the open restriction position that is the maximum release position with respect to the first contact portion 29 and the second contact portion 43 during overrun. Abut at the same time.

  As shown in FIG. 4, covering portions 44 that cover both side surfaces of the upper connection terminal 23 are formed on both edge portions of the bottom portion of the buffer member 40. That is, the buffer member 40 is integrally formed by the mounting portion 41, the fitting portion 42, the second contact portion 43, the covering portion 44, and the inclined portion 46.

  Next, the action of the buffer member 40 when the movable electrode 20 is opened will be described with reference to FIGS. 1 and 3. Here, the opening restriction position where the movable electrode 20 has rotated more than the set opening position in the opening direction will be described.

  As shown in FIGS. 1 and 3, when the movable electrode 20 is rotated in the opening direction, the two contact blades 20 a and 20 b are separated from the fixed electrode 30. When the movable electrode 20 rotates in the opening direction from the set opening position and overruns, the movable electrode 20 comes into contact with the first contact portion 29 and the second contact portion 43 at the opening restriction position. When the first contact portion 20d of the movable electrode 20 made of metal and the first contact portion 29 of the upper connection terminal 23 made of metal contact each other, the rotation of the movable electrode 20 is surely stopped. Further, when the first contact portion 20d and the second contact portion 20e of the metal movable electrode 20 are in contact with the second contact portion 43 and the inclined portion 46 of the buffer member 40 formed of an elastic member, respectively. The shock absorbing member 40 absorbs the impact caused by the rotation of the movable electrode 20 and reliably stops the rotation of the movable electrode 20.

As described above, according to the embodiment described above, the following effects can be obtained.
(1) The rotation of the movable electrode 20 can be restricted by the first contact portion 29 formed on the upper connection terminal 23 as the conductive member and the second contact portion 43 formed on the buffer member 40. In addition, since the first contact portion 29 is attached to the upper connection terminal 23 and the buffer member 40 is attached to the upper connection terminal 23, the size of the multi-circuit switch can be reduced without affecting the physique of the multi-circuit switch. it can. Therefore, the size can be reduced while suppressing damage to the member due to overrun when the movable electrode 20 is opened. Furthermore, since the rotation of the movable electrode 20 is restricted in the vicinity of the rotation axis of the movable electrode 20, it is possible to receive an impact of the movable electrode 20 at a portion where the moving speed is slow and to suppress deterioration of the contact portion.

  (2) The upper connection terminal 23 is formed of an inelastic member, and the buffer member 40 is formed of an elastic member. Therefore, the rotation of the movable electrode 20 can be reliably restricted by the first contact portion 29 formed of an inelastic member, and the movable electrode 20 can be controlled by the second contact portion 43 formed of an elastic member. The impact due to the contact can be absorbed.

  (3) The buffer member 40 covers the upper connection terminal 23 and is in close contact with the upper support member 21 that supports the upper connection terminal 23. For this reason, the impact when the movable electrode 20 contacts the second contact portion 43 can be dispersed and absorbed by the upper connection terminal 23 and the upper support member 21.

  (4) Since the first contact portion 29 and the second contact portion 43 are in contact with the movable electrode 20 at the same time, the upper connection terminal 23 and the buffer member 40 can simultaneously absorb the impact on the movable electrode 20. .

  (5) Since the corner portion of the upper support member 21 is located behind the portion of the buffer member 40 that contacts the movable electrode 20, the impact caused by the contact of the movable electrode 20 is absorbed by the corner portion of the upper support member 21. be able to.

  (6) Since the buffer member 40 is fitted into the groove 21 b formed in the upper support member 21, the buffer member 40 can be accommodated in the physique of the upper support member 21. Therefore, it can suppress that a physique increases with the buffer member 40. FIG. Further, since the rear end portion 42 a of the fitting portion 42 and the rear end portion 21 c of the groove portion 21 b are in contact with each other, the impact can be absorbed by the upper support member 21.

In addition, the said embodiment can be implemented with the following forms which changed this suitably.
-In above-mentioned embodiment, although the fitting part 42 of the buffer member 40 was fitted to the groove part 21b of the upper side support member 21, the fitting part 42 may be abbreviate | omitted.

In the above embodiment, the maximum opening position is set as the opening restriction position and is different from the setting opening position. However, the maximum opening position and the setting opening position may be set at the same position.
In the above embodiment, the inclined portion 46 is formed in the lower portion of the second contact portion 43, but as shown in FIG. 5, the inclined portion 46 serves as the third contact portion 46 and the back surface of the movable electrode 20. May be brought into contact with each other. For example, the second contact portion 43 and the third contact portion 46 are formed in a two-step shape. The third contact portion 46 is formed to be inclined on the same extension as the contact surface of the first contact portion 29. The contact surface of the third contact portion 46 and the contact surface of the second contact portion 43 are formed in parallel. The first contact portion 20 d of the movable electrode 20 contacts the third contact portion 46. A second contact portion 20 e that is a back surface portion adjacent to the upper portion of the first contact portion 20 d of the movable electrode 20 contacts the upper portion of the second contact portion 43. Note that the movable electrode 20 has a predetermined set open position, and the maximum open position with respect to the first contact portion 29, the second contact portion 43, and the third contact portion 46 during overrun. Are simultaneously abutted at the open restriction position. That is, the buffer member 40 is integrally formed by the mounting portion 41, the fitting portion 42, the second contact portion 43, the covering portion 44, and the third contact portion 46. The first contact portion 20d and the second contact portion 20e of the metal movable electrode 20 and the second contact portion 43 and the third contact portion 46 of the buffer member 40 formed of an elastic member are in contact with each other. Then, the shock due to the rotation of the movable electrode 20 is absorbed by the buffer member 40 and the rotation of the movable electrode 20 is surely stopped.

  In this way, the rotation of the movable electrode 20 can be restricted at the open restriction position by the third contact part 46 together with the first contact part 29 and the second contact part 43. The contact surface of the first contact portion 29 and the contact surface of the third contact portion 46 are formed on the same extension. Therefore, the first contact portion 29 of the upper connection terminal 23 and the third contact portion 46 of the buffer member 40 are in contact with the movable electrode 20 in the same manner, and are movable by the upper connection terminal 23 and the buffer member 40. The impact with the electrode 20 can be reliably absorbed.

  In the above embodiment, the movable electrode 20 is brought into contact with the first contact portion 29 and the second contact portion 43 simultaneously. However, as shown in FIG. The contact portion 29 may be contacted at the opening restriction position, and the second contact portion 43 may be contacted before the first contact portion 29. That is, the movable electrode 20 may be contacted in the order of the second contact portion 43 → the first contact portion 29. If it does in this way, after absorbing an impact with the 2nd contact part 43 formed with the elastic member, rotation in the 1st contact part 29 can be controlled reliably. Moreover, damage at the time of contact of the movable electrode 20 can be suppressed.

  Alternatively, the movable electrode 20 may be contacted in the order of the second contact portion 43 → the third contact portion 46 → the first contact portion 29. In this way, after the impact is absorbed by the second contact portion 43 and the third contact portion 46 formed of an elastic member, the movable electrode 20 is more reliably rotated at the first contact portion 29. Can be regulated. Moreover, damage at the time of contact of the movable electrode 20 can be further suppressed.

  In the above embodiment, the rotation of the movable electrode 20 is regulated by the first contact portion 29 formed on the upper connection terminal 23 and the second contact portion 43 formed on the buffer member 40. As shown in FIG. 4, the mounting portion 41 may be extended to the fixed electrode 30 side to form a fourth contact portion 47 so as to contact the insulating barrier 28 at the opening restriction position of the movable electrode 20. In this way, the rotation of the movable electrode 20 can be more reliably regulated.

  In the above embodiment, the movable electrode 20 is brought into contact with the first contact portion 29 and the second contact portion 43. However, a buffer member is further provided between the movable electrodes 20 to open the movable electrode 20. The buffer member may abut on the upper connection terminal 23 at the restriction position. For example, as shown in FIG. 6, the buffer member 50 is installed between the movable electrodes 20 by the fixed shaft 28 a, and the buffer member 50 comes into contact with the bolt 45 of the upper connection terminal 23 at the opening restriction position of the movable electrode 20. . In this way, the rotation of the movable electrode 20 can be more reliably regulated.

In the above embodiment, the buffer member 40 is an elastic member, but the buffer member 40 may be a non-elastic member.
In the above embodiment, the buffer member 40 is provided in the multi-circuit switch. However, the buffer member 40 may be provided not only in the multi-circuit switch but also in other power distribution devices such as a switch. For example, as shown in FIG. 7, a power supply side bushing 62 is penetrated and fixed to the power supply side wall 61 of the switch body case 60, and a load side bushing 64 is fixed to the load side wall 63. . A fixed electrode 65 protrudes and is fixed to the power supply side bushing 62. On the other hand, a connection terminal 66 protrudes and is fixed to the load side bushing 64, and a movable electrode 67 is rotatably attached to the tip of the connection terminal 66. The connection terminal 66 is formed with a first contact portion 69 that contacts the first contact portion 20 d of the movable electrode 67. The buffer member 40 is attached to the upper portion of the connection terminal 66 by two bolts 45. The buffer member 40 is provided with a second contact portion 43 with which the second contact portion 20 e of the movable electrode 67 contacts. In the buffer member 40, when the movable electrode 67 reaches the set open position, the first contact portion 20d of the movable electrode 67 contacts the first contact portion 69 of the connection terminal 66, and the second contact of the movable electrode 67 occurs. The portion 20 e abuts on the second abutting portion 43 of the buffer member 40 to restrict the rotation of the movable electrode 67.

  DESCRIPTION OF SYMBOLS 10 ... Opening and closing part, 11 ... Main body case, 12 ... Upper side support plate, 13 ... Lower side support plate, 13a ... Engagement hole, 14 ... Main shaft, 15 ... Drive lever, 16 ... Connection shaft, 17 ... Actuation link, 18 An arc extinguishing device, 20 a movable electrode, 20 a, 20 b a contact blade, 20 c an arc-resistant metal, 20 d a first contact portion, 20 e a second contact portion, 21 an upper support member, 21 a a storage recess, 21b ... groove, 21c ... rear end, 21d ... corner, 22 ... bolt, 23 ... upper connection terminal, 24 ... rotating shaft, 25 ... common busbar, 27 ... clamp spring, 28 ... insulation barrier, 28a ... fixed Axis 29 ... first contact portion 30 ... fixed electrode 30a ... arc-resistant metal 31 ... lower support member 31a ... storage recess 32 ... bolt 33 ... lower connection terminal 34 ... connection conductor 40 ... cushioning member, 41 ... mounting part, 42 ... fitting part, 42a ... rear end part, 4 ... second contact portion, 44 ... coating unit, 45 ... bolt, 46 ... inclined portion.

Claims (7)

A fixed electrode and a movable electrode rotatable with respect to the fixed electrode. When the movable electrode is rotated in the closing direction, the electrodes are brought into contact with each other, and the movable electrode is rotated in the opening direction. In power distribution equipment that separates both electrodes when
The movable electrode is rotatably attached to the conductive member,
A first contact portion formed on the conductive member and in contact with the movable electrode;
A buffer member mounted on the conductive member and formed with a second contact portion with which the movable electrode contacts,
When the movable electrode is rotated in the opening direction, the movable electrode is in contact with the first contact portion and the second contact portion to restrict the rotation of the movable electrode. Power distribution equipment. The power distribution device according to claim 1,
The conductive member is formed of an inelastic member,
The buffer device is formed of an elastic member. The power distribution device according to claim 1 or 2,
The power distribution device, wherein the first contact portion and the second contact portion are in contact with the movable electrode simultaneously. The power distribution device according to claim 1 or 2,
The first abutting portion and the second abutting portion are characterized in that the movable electrode and the first abutting portion abut after the movable electrode and the second abutting portion abut. Power distribution equipment. In the power distribution apparatus as described in any one of Claims 1-4,
The buffer member includes a third abutting portion on which the movable electrode abuts and a contact surface formed on the same extension as the abutting surface of the first abutting portion is formed,
When the movable electrode is rotated in the opening direction, the movable electrode is rotated by the movable electrode being in contact with the first contact portion, the second contact portion, and the third contact portion. Power distribution equipment characterized by regulation. In the power distribution apparatus as described in any one of Claims 1-5,
A power distribution device, wherein a corner portion of a support member that supports the conductive member is located behind the contact surface of the buffer member. In the power distribution apparatus as described in any one of Claims 1-6,
Forming a groove in a support member for supporting the conductive member;
The said buffer member covers the said electrically-conductive member, and it is made to fittingly_contact | adhere to the said groove part. Power distribution apparatus characterized by the above-mentioned.

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