JP7110827B2 - electromagnetic relay - Google Patents

Description

The present invention relates to electromagnetic relays.

Conventionally, an electromagnetic relay that opens and closes an electric circuit is known. The electromagnetic relay described in Patent Literature 1 includes a housing, fixed contacts, movable contacts, a movable shaft, and an electromagnetic drive device. A fixed contact, a movable contact, a movable shaft, and an electromagnetic drive are arranged in a sealed space within the housing. The electromagnetic drive includes a coil and a movable core connected to a movable shaft. The movable shaft moves axially as the movable core moves. As the drive shaft moves in the axial direction, the movable contactor moves in the direction of contacting or separating from the fixed contact to open or close the electric circuit.

Japanese Patent No. 3997700

In an electromagnetic relay, an arc is generated when a movable contact separates from a fixed contact, increasing the internal pressure within the housing. Therefore, in the electromagnetic relay of Patent Literature 1, a structure is disclosed in which the internal pressure raised by the arc is released along a partition provided around the electromagnetic relay.

By the way, in the electromagnetic relay described above, the positions of the fixed contact, the movable contact, and the movable iron core are determined by the contact direction in which the movable contact contacts the fixed contact and the direction in which the movable iron core receives the internal pressure increased by the arc. They may be placed in the same direction. In this case, since the movable iron core is pushed in the contact direction by the internal pressure increased by the arc, there is a possibility that the separation speed at which the movable contact separates from the fixed contact decreases.

SUMMARY OF THE INVENTION An object of the present invention is to suppress a decrease in the separation speed when the movable contact separates from the fixed contact.

(1) An electromagnetic relay according to one aspect of the present invention includes a housing, a fixed contact, a movable contact piece, a drive shaft, an electromagnetic drive device, a connection passage, and a decompression section. The housing includes a first receiving portion. A fixed contact is disposed in the first housing. The movable contact piece is arranged in the first housing to face the fixed contact, is capable of contacting the fixed contact, and is movable in a first direction to contact the fixed contact and a second direction to separate from the fixed contact. . The drive shaft extends along the first direction and the second direction, is connected to the movable contact piece and is movable in the first direction and the second direction together with the movable contact piece. An electromagnetic drive is disposed within the housing to move the drive shaft in a first direction. The electromagnetic drive device includes: a second accommodation portion arranged on the first direction side of the first accommodation portion; a movable iron core arranged in the second accommodation portion and coupled to the drive shaft so as to be movable integrally; a fixed core disposed facing the movable core on the first direction side of the movable core, and a biasing member disposed between the fixed core and the movable core and biasing the movable core in the second direction. ,including. The connection passage connects the first accommodating portion and the second accommodating portion. The decompression part reduces the pressure applied to the surface of the movable iron core on the second direction side when the internal pressure of the first receiving part increases due to the arc generated between the fixed contact and the movable contact piece.

In this electromagnetic relay, when the internal pressure of the first accommodating portion increases due to the arc, the pressure applied to the surface of the movable iron core on the second direction side can be reduced by the pressure reducing portion. As a result, it is possible to reduce the pressure that presses the movable core in the direction of contact with the fixed contact due to the increased internal pressure, so that it is possible to suppress a decrease in the separation speed when the movable contact separates from the fixed contact.

(2) Preferably, the decompression section includes a relief passage in the second housing section for releasing the increased internal pressure of the first housing section toward the first direction side of the movable iron core. In this case, since the relief passage is provided, the pressure applied to the first surface of the movable iron core can be reduced, so that it is possible to further suppress the decrease in the separation speed when the movable contact separates from the fixed contact.

(3) Preferably, the relief passage relieves the increased internal pressure of the first accommodating portion between the movable iron core and the fixed iron core. In this case, since the second surface of the movable iron core is pressed in the opening direction, it is possible to further suppress the decrease in opening speed.

(4) Preferably, the escape passage is provided between the inner peripheral surface of the second accommodating portion and the outer peripheral surface of the movable iron core. In this case, the escape passage can be formed with a simple structure.

(5) Preferably, the decompression part includes a groove formed over the entire length of the movable core in the first direction and the second direction, and the escape passage is formed by the groove. In this case also, the pressure applied to the first surface of the movable iron core can be reduced with a simple configuration.

(6) Preferably, the movable core has a columnar shape, the decompression section includes a planar portion formed over the entire length of the movable core in the first direction and the second direction, and the relief passage is defined by the planar portion. It is configured. In this case also, the pressure applied to the first surface of the movable iron core can be reduced with a simple configuration.

(7) Preferably, the decompression part includes a first through hole penetrating in the first direction and the second direction in the movable iron core, and the escape passage is formed by the first through hole. In this case also, the pressure applied to the first surface of the movable iron core can be reduced with a simple configuration.

(8) Preferably, the first accommodating portion has a second through hole through which the drive shaft passes in the first direction and the second direction, and the connecting passage is the second through hole. In this case, the structure of the connecting passage can be simplified.

(9) Preferably, the movable iron core has the drive shaft penetrating through the center thereof, and the decompression portion includes an inclined portion that inclines in the first direction as the distance from the axis of the drive shaft increases in the movable iron core. In this case, since the pressure applied in the first direction can be vector-dispersed on the surface of the movable iron core on the second direction side, the pressure applied to the surface of the movable iron core on the second direction side can be reduced.

(10) Preferably, the first direction and the second direction are vertical directions, and the movable contact piece is arranged above the fixed contact. In this case, in an electromagnetic relay in which the movable contact piece is arranged above the fixed contact, it is possible to suppress a decrease in the separation speed when the movable contact separates from the fixed contact.

ADVANTAGE OF THE INVENTION According to this invention, the fall of the separation speed when a movable contact separates from a fixed contact can be suppressed.

1 is a cross-sectional view of an electromagnetic relay according to one embodiment of the present invention; FIG. It is a top view of a contact case. It is a top view of a movable iron core. FIG. 4 is a cross-sectional view of the electromagnetic relay when voltage is applied to the coil; FIG. 4 is an enlarged view of the vicinity of the movable iron core when application of voltage to the coil is stopped; It is a top view of the movable iron core which concerns on a 1st modification. FIG. 11 is a plan view of a movable core according to a second modified example; FIG. 11 is a cross-sectional view of an electromagnetic relay according to a third modified example;

Hereinafter, an embodiment of an electromagnetic relay according to one aspect of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of an electromagnetic relay 100. FIG. As shown in FIG. 1 , the electromagnetic relay 100 includes a housing 2 , a contact device 3 , a drive shaft 4 , an electromagnetic drive device 5 , a connection passage 6 and a decompression section 7 . In the following description, the direction in which the axis Ax of the drive shaft 4 extends will be referred to as the "axial direction". In addition, when referring to the drawings, in order to facilitate understanding, the upper side in FIG. 1 is referred to as "upper", the lower side as "lower", the left side as "left", and the right side as "right".

The housing 2 includes a case 2a and a cover 2b. The case 2a has a substantially rectangular box shape and is open at the top. The cover 2b covers the top of the case 2a. The inside of the housing 2 is sealed by a case 2a and a cover 2b. The case 2a and the cover 2b are made of an insulating material. A contact device 3 , a drive shaft 4 , an electromagnetic drive device 5 , a connection passage 6 , and a pressure reducing portion 7 are housed inside the housing 2 .

Housing 2 includes a first receiving portion 10 . The contact device 3 is accommodated in the first accommodation portion 10 . The first accommodation portion 10 is formed by a contact case 11 and a contact cover 12 . The contact case 11 and the contact cover 12 are made of an insulating material.

FIG. 2 is a plan view of the contact case 11. FIG. As shown in FIGS. 1 and 2, the contact case 11 includes a bottom portion 11a, a cylindrical portion 11b, an inner wall 11c, and an outer wall 11d. The bottom portion 11a is formed in a rectangular plate shape. The longitudinal direction of the bottom portion 11a matches the left-right direction in FIG.

The cylindrical portion 11b extends cylindrically in the axial direction. The cylindrical portion 11b protrudes downward from the center of the bottom portion 11a and protrudes upward from the center of the bottom portion 11a. The cylindrical portion 11b includes a through hole 18 that axially penetrates the bottom portion 11a. The through hole 18 axially penetrates the center of the bottom portion 11a. The drive shaft 4 passes through the through hole 18 in the axial direction.

The inner wall 11c has a rectangular shape in plan view, and extends upward in a plate shape from the bottom portion 11a so as to surround the outer circumference of the cylindrical portion 11b. The inner wall 11c extends longer upward than the cylindrical portion 11b. The space surrounded by the inner wall 11c accommodates a part of the contact piece holding portion 17, which will be described later.

The outer wall 11d is formed at a position farther from the cylindrical portion 11b than the inner wall 11c. The outer wall 11d extends upward in a plate shape from the bottom portion 11a. The outer wall 11d has a substantially rectangular shape in plan view, and extends longer upward than the inner wall 11c.

The contact case 11 further includes a first contact support portion 11e and a second contact support portion 11f. The first contact support portion 11e is arranged on the left side of the center of the bottom portion 11a in the longitudinal direction. The first contact support portion 11e is formed to protrude upward in a rectangular shape from the bottom portion 11a. The first contact support portion 11e is formed so as to penetrate a portion of the outer wall 11d in the left-right direction. The first contact support portion 11e is arranged facing the inner wall 11c in the left-right direction. The second contact support portion 11f is bilaterally symmetrical with the first contact support portion 11e, and thus description thereof is omitted.

The contact cover 12 covers the contact case 11 from above. Contact cover 12 includes an arc extension wall 12a extending along outer wall 11d of contact case 11 toward bottom portion 11a. The arc extension wall 12a is arranged within the first housing portion 10 .

In the bottom portion 11a, an insulating member 21 (see FIG. 1) is arranged on a bottom surface 20 (see FIG. 2) surrounded by the inner wall 11c, the outer wall 11d, the first contact support portion 11e, and the second contact support portion 11f. ing.

The contact device 3 includes a first fixed terminal 14 , a second fixed terminal 15 , a movable contact piece 16 and a contact piece holding portion 17 . The first fixed terminal 14, the second fixed terminal 15, and the movable contact piece 16 are made of a conductive material.

The first fixed terminal 14 is supported by the first contact support portion 11 e of the contact case 11 inside the housing 2 . The first fixed terminal 14 includes a first fixed contact 14a and a first external connection portion 14b. The first fixed contact 14a is arranged inside the first accommodating portion 10 above the first contact support portion 11e. The first fixed contact 14a is an example of a fixed contact. The first external connection portion 14b protrudes in the left-right direction from the case 2a.

The second fixed terminal 15 is supported by the second contact support portion 11 f of the contact case 11 inside the housing 2 . The second fixed terminal 15 includes a second fixed contact 15a and a second external connection portion 15b. The second fixed contact 15a is arranged apart from the first fixed contact 14a in the left-right direction.

The movable contact piece 16 is arranged inside the first accommodating portion 10 so as to face the first fixed contact 14a and the second fixed contact 15a. The movable contact piece 16 is arranged above the first fixed contact 14a and the second fixed contact 15a. The movable contact piece 16 includes a first movable contact 16a and a second movable contact 16b. The first movable contact 16a is arranged to face the first fixed contact 14a and can come into contact with the first fixed contact 14a. The second movable contact 16b is arranged to face the second fixed contact 15a and can come into contact with the second fixed contact 15a.

The movable contact piece 16 can move in a contact direction Z1 to contact the first fixed contact 14a and the second fixed contact 15a and a separation direction Z2 to separate from the first fixed contact 14a and the second fixed contact 15a. The contact direction Z1 is an example of a first direction, and the separation direction Z2 is an example of a second direction.

The contact direction Z1 is the direction (downward in FIG. 1) in which the first movable contact 16a and the second movable contact 16b contact the first fixed contact 14a and the second fixed contact 15a. The separating direction Z2 is the direction (upward in FIG. 1) in which the first movable contact 16a and the second movable contact 16b separate from the first fixed contact 14a and the second fixed contact 15a. The contact direction Z1 and the separation direction Z2 coincide with the axial direction.

The contact piece holding portion 17 holds the movable contact piece 16 via the drive shaft 4 . The contact piece holding portion 17 connects the movable contact piece 16 and the drive shaft 4 . The contact piece holding portion 17 includes a holder 24 and contact springs 25 . The movable contact piece 16 is sandwiched between the upper portion of the holder 24 and the flange portion 4a of the drive shaft 4 in the axial direction. The contact spring 25 is arranged between the bottom portion of the holder 24 and the flange portion 4a of the drive shaft 4, and biases the drive shaft 4 and the movable contact piece 16 toward the opening direction Z2.

The drive shaft 4 extends along the contact direction Z1 and the separation direction Z2. The drive shaft 4 is connected to the movable contact piece 16 via the contact piece holding portion 17 . The drive shaft 4 can move along with the movable contact piece 16 in the contact direction Z1 and the separation direction Z2.

The electromagnetic drive device 5 moves the drive shaft 4 in the contact direction Z1 by electromagnetic force. The electromagnetic drive device 5 is arranged in a space different from the first accommodation portion 10 in the housing 2 . In this embodiment, the electromagnetic drive device 5 is arranged below the contact case 11 .

The electromagnetic drive device 5 includes a coil 32 , a spool 33 , a movable core 34 , a fixed core 35 , a biasing member 36 and a yoke 37 .

The coil 32 is attached to the outer circumference of the spool 33 . The spool 33 is arranged on the contact direction Z1 side of the first housing portion 10 . The spool 33 includes a second accommodation portion 33a. The second accommodating portion 33 a is provided on the inner peripheral portion of the spool 33 . The second housing portion 33a is cylindrical and extends along the axial direction. The second accommodating portion 33a overlaps the through hole 18 of the cylindrical portion 11b of the contact case 11 in the axial direction. A portion of the drive shaft 4 is arranged in the second housing portion 33a. It should be noted that the second accommodation portion 33a does not necessarily need to be provided on the inner peripheral portion of the spool 33. As shown in FIG.

The movable iron core 34 is arranged inside the second accommodating portion 33a. The movable iron core 34 has a columnar shape, and the drive shaft 4 passes through the center in the axial direction, and is connected to the drive shaft 4 so as to be movable integrally therewith. The movable iron core 34 is axially movable together with the drive shaft 4 . In this embodiment, the axial movement of the movable core 34 is guided by the annular core 38 arranged in the second accommodating portion 33a. The annular core 38 is supported, for example, by a stepped portion formed on the inner peripheral surface of the second accommodating portion 33a. A tubular member that guides the movement of the movable iron core 34 may be provided on the inner peripheral portion of the spool 33, and the tubular member may constitute the second accommodating portion 33a.

The movable core 34 includes a first surface 34a and a second surface 34b. The first surface 34a is the surface on the separation direction Z2 side. The second surface 34b is the surface on the contact direction Z1 side. The first surface 34a and the second surface 34b have a flat shape along the direction orthogonal to the drive shaft 4. As shown in FIG.

The fixed core 35 is arranged to face the movable core 34 on the contact direction Z1 side of the movable core 34 in the second accommodation portion 33a. The fixed core 35 is fixed to the yoke 37 .

The biasing member 36 is, for example, a coil spring and is arranged between the movable core 34 and the fixed core 35 . The biasing member 36 biases the movable core 34 in the opening direction Z2. Therefore, the biasing member 36 is arranged between the movable core 34 and the fixed core 35 in a compressed state.

The yoke 37 includes a first yoke 37a and a second yoke 37b. The first yoke 37 a is plate-shaped and arranged between the bottom portion 11 a of the contact case 11 and the spool 33 . The first yoke 37a overlaps the lower portion of the cylindrical portion 11b in the left-right direction. The first yoke 37 a is connected to the annular core 38 . The second yoke 37b has a substantially U-shape, and the bottom is arranged below the spool 33. As shown in FIG. The upper ends of both sides of the second yoke 37b are connected to the first yoke 37a.

The connection passage 6 connects the first housing portion 10 and the second housing portion 33a. The connection passage 6 is arranged to face the first surface 34 a of the movable iron core 34 . In this embodiment, the connection passage 6 is formed by the through hole 18 of the cylindrical portion 11 b of the contact case 11 . Therefore, the first accommodation portion 10 and the second accommodation portion 33a are connected by the through hole 18 of the cylindrical portion 11b.

The decompression part 7 reduces the pressure on the first surface of the movable iron core 34 when the internal pressure of the first housing part 10 rises due to the arc generated between the first fixed contact 14 a and the second fixed contact 15 a and the movable contact piece 16 . Reduce the pressure experienced by 34a.

FIG. 3 is a plan view of the movable iron core 34 arranged inside the second accommodating portion 33a. 3, the drive shaft 4 is omitted. As shown in FIG. 3 , the pressure reducing portion 7 includes one or more concave grooves 42 formed over the entire axial length of the movable core 34 . The groove 42 is formed on the outer peripheral surface of the movable iron core 34 so as to be recessed toward the axis Ax of the drive shaft 4 . Here, four concave grooves 42 are formed at intervals in the circumferential direction of the movable iron core 34 .

The decompression section 7 includes an escape passage 40 . The escape passage 40 releases the increased internal pressure of the first accommodation portion 10 toward the contact direction Z1 side of the movable iron core 34 in the second accommodation portion 33a. Preferably, the relief passage 40 relieves the increased internal pressure of the first accommodating portion 10 between the movable iron core 34 and the fixed iron core 35 .

The escape passage 40 is provided between the inner peripheral surface of the second accommodating portion 33 a and the outer peripheral surface of the movable iron core 34 . Specifically, the escape passage 40 is provided between the inner peripheral surface of the annular core 38 and the outer peripheral surface of the movable core 34 . In this embodiment, the escape passage 40 is configured by a groove 42 .

Next, operation of the electromagnetic relay 100 will be described. FIG. 1 shows a state in which no voltage is applied to the coil 32 . When no voltage is applied to the coil 32, the biasing member 36 prevents the movable iron core 34 from moving in the separation direction Z2. Therefore, the first movable contact 16a and the second movable contact 16b are separated from the first fixed contact 14a and the second fixed contact 15a.

FIG. 4 shows a state in which voltage is applied to the coil 32 . When a voltage is applied to the coil 32 to excite it, the electromagnetic force of the coil 32 causes the movable iron core 34 to move in the contact direction Z1 against the elastic force of the biasing member 36 . As the movable iron core 34 moves, the drive shaft 4 and the movable contact piece 16 move in the contact direction Z1, and the first movable contact 16a and the second movable contact 16b move to the first fixed contact 14a and the second fixed contact 15a. Contact. At this time, the first surface 34 a of the movable core 34 is in contact with the fixed core 35 . In addition, when the first movable contact 16a and the second movable contact 16b contact the first fixed contact 14a and the second fixed contact 15a, a gap is formed between the movable iron core 34 and the fixed iron core 35. may

When the voltage application to the coil 32 is stopped, the elastic force of the biasing member 36 moves the movable iron core 34 in the separating direction Z2, and the first movable contact 16a and the second movable contact 16b are connected to the first fixed contact 14a. and separated from the second fixed contact 15a.

Here, when the first movable contact 16a and the second movable contact 16b separate from the first fixed contact 14a and the second fixed contact 15a, the first movable contact 16a and the second movable contact 16b and the first fixed contact An arc may occur between 14a and the second fixed contact 15a. When an arc occurs, the internal pressure of the first housing portion 10 housing the contact device 3 increases, and the increased internal pressure applies pressure to the first surface 34a of the movable iron core 34 disposed within the second housing portion 33a. That is, the movable iron core 34 is pressed in the contact direction Z1 side as the internal pressure of the first accommodating portion 10 increases due to the generation of the arc. When the movable iron core 34 is pressed in the contact direction Z1, the separation speed at which the first movable contact 16a and the second movable contact 16b separate from the first fixed contact 14a and the second fixed contact 15a decreases. .

However, in the electromagnetic relay 100 according to the present embodiment, the pressure applied to the first surface 34a of the movable iron core 34 can be reduced by the pressure reducing portion 7, so that a decrease in opening speed can be suppressed. Specifically, since the groove 42 is formed in a part of the first surface 34a of the movable core 34, the surface area of the movable core 34 is reduced. As a result, the pressure applied to the first surface 34a of the movable iron core 34 is reduced.

FIG. 5 is an enlarged view around the movable core 34 when the voltage application to the coil 32 is stopped. Specifically, the state when the first movable contact 16a and the second movable contact 16b are separated from the first fixed contact 14a and the second fixed contact 15a when the voltage application to the coil 32 is stopped. It is a diagram showing. As shown in FIG. 5, in the electromagnetic relay 100, the relief passage 40, that is, the concave groove 42 is provided, so that the increased internal pressure of the first accommodating portion 10 can be released to the contact direction Z1 side of the movable iron core 34. As a result, the pressure applied to the first surface 34a of the movable iron core 34 is reduced.

Furthermore, as indicated by arrows in FIG. 5, the release passage 40 releases the increased internal pressure of the first accommodating portion 10 between the movable iron core 34 and the fixed iron core 35, that is, to the second surface 34b side. As a result, the second surface 34b of the movable iron core 34 is pressed in the opening direction Z2, so that the opening speed can be further suppressed.

Although the embodiments of the electromagnetic relay according to one aspect of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications are possible without departing from the gist of the invention. For example, the configuration of the electromagnetic drive device 5 may be changed. The shape or arrangement of the coil 32, the spool 33, the movable core 34, the biasing member 36, or the yoke 37 may be changed. The shape or arrangement of the housing 2, the contact case 11, and the contact cover 12 may be changed. The shape or arrangement of the connection passage 6, the decompression portion 7, the first accommodation portion 10, and the second accommodation portion 33a may be changed.

FIG. 6 is a plan view of the movable core 34 according to the first modified example. As shown in FIG. 6 , the decompression section 7 according to the first modification includes one or more plane portions 44 formed over the entire axial length of the movable core 34 . The flat portion 44 is formed on the outer peripheral surface of the movable iron core 34 . The relief passage 40 is configured by a flat portion 44 . Also in this case, the same effects as in the above embodiment can be obtained.

FIG. 7 is a plan view of a movable core 34 according to a second modification. As shown in FIG. 7, the decompression part 7 according to the second modification includes one or more through-holes 46 formed through the movable core 34 in the axial direction. The escape passage 40 is configured by a through hole 46 . Also in this case, the same effects as in the above embodiment can be obtained.

FIG. 8 is a cross-sectional view of an electromagnetic relay 100 according to a third modified example. The decompression portion 7 according to the third modification includes an inclined portion 48 in the movable iron core 34 that inclines toward the contact direction Z1 side as the distance from the axis Ax of the drive shaft 4 increases. The inclined portion 48 is provided on the first surface 34 a of the movable core 34 . In this case, since the pressure applied in the axial direction can be vector-dispersed on the first surface 34a of the movable iron core 34, the pressure applied to the first surface 34a of the movable iron core 34 can be reduced. In addition, in the electromagnetic relay according to the third modification, an escape passage 40 may be further provided.

ADVANTAGE OF THE INVENTION According to this invention, the fall of the separation speed when a movable contact separates from a fixed contact can be suppressed.

2 housing 4 drive shaft 5 electromagnetic drive device 6 connection passage 7 decompression section 10 first accommodating section 14a first fixed contact (an example of a fixed contact)
15a Second fixed contact (an example of a fixed contact)
16 movable contact piece 18 through hole (an example of a second through hole)
33a Second accommodating portion 34 Movable iron core 34 First surface 34a
35 Fixed iron core 36 Biasing member 40 Relief passage 42 Groove 44 Plane portion 46 Through hole (an example of a first through hole)
48 inclined portion 100 electromagnetic relay Ax drive shaft axis Z1 contact direction (an example of the first direction)
Z2 opening direction (an example of the second direction)

Claims (8)

a housing including a first housing;
a fixed contact disposed within the first accommodating portion;
A movable movable contact is arranged in the first accommodating portion so as to face the fixed contact, is capable of contacting the fixed contact, and is movable in a first direction to contact the fixed contact and a second direction to separate from the fixed contact. a contact strip;
a driving shaft extending along the first direction and the second direction, connected to the movable contact piece and movable in the first direction and the second direction together with the movable contact piece;
a second accommodation portion arranged on the first direction side of the first accommodation portion; a movable iron core arranged in the second accommodation portion and connected to the drive shaft so as to be movable integrally; in the fixed core disposed facing the movable core on the first direction side of the movable core, and the movable core disposed between the fixed core and the movable core facing the second direction an electromagnetic drive for moving the drive shaft in the first direction , comprising a biasing member for biasing;
a connection passage that connects the first accommodation portion and the second accommodation portion;
a depressurizing portion that reduces the pressure received by the surface of the movable iron core on the second direction side when the internal pressure of the first accommodating portion rises due to an arc generated between the fixed contact and the movable contact piece;
with
The decompression part includes an inclined part in the movable iron core that inclines in the first direction as the distance from the axis of the drive shaft increases,
electromagnetic relay.
a housing including a first housing;
a fixed contact disposed within the first accommodating portion;
A movable movable contact is arranged in the first accommodating portion so as to face the fixed contact, is capable of contacting the fixed contact, and is movable in a first direction to contact the fixed contact and a second direction to separate from the fixed contact. a contact strip;
a driving shaft extending along the first direction and the second direction, connected to the movable contact piece and movable in the first direction and the second direction together with the movable contact piece;
a second accommodation portion arranged on the first direction side of the first accommodation portion; a movable iron core arranged in the second accommodation portion and connected to the drive shaft so as to be movable integrally; in the fixed core disposed facing the movable core on the first direction side of the movable core, and the movable core disposed between the fixed core and the movable core facing the second direction an electromagnetic drive for moving the drive shaft in the first direction, comprising a biasing member for biasing;
a connection passage that connects the first accommodation portion and the second accommodation portion;
a depressurizing portion that reduces the pressure received by the surface of the movable iron core on the second direction side when the internal pressure of the first accommodating portion rises due to an arc generated between the fixed contact and the movable contact piece;
with
The decompression section includes a relief passage in the second housing section for releasing the increased internal pressure of the first housing section toward the first direction side of the movable iron core,
The decompression part includes a groove formed over the entire length in the first direction and the second direction in the movable core,
The relief passage is configured by the concave groove,
electromagnetic relay.
a housing including a first housing;
a fixed contact disposed within the first accommodating portion;
A movable movable contact is arranged in the first accommodating portion so as to face the fixed contact, is capable of contacting the fixed contact, and is movable in a first direction to contact the fixed contact and a second direction to separate from the fixed contact. a contact strip;
a driving shaft extending along the first direction and the second direction, connected to the movable contact piece and movable in the first direction and the second direction together with the movable contact piece;
a second accommodation portion arranged on the first direction side of the first accommodation portion; a movable iron core arranged in the second accommodation portion and connected to the drive shaft so as to be movable integrally; in the fixed core disposed facing the movable core on the first direction side of the movable core, and the movable core disposed between the fixed core and the movable core facing the second direction an electromagnetic drive for moving the drive shaft in the first direction, comprising a biasing member for biasing;
a connection passage that connects the first accommodation portion and the second accommodation portion;
a depressurizing portion that reduces the pressure received by the surface of the movable iron core on the second direction side when the internal pressure of the first accommodating portion rises due to an arc generated between the fixed contact and the movable contact piece;
with
The decompression section includes a relief passage in the second housing section for releasing the increased internal pressure of the first housing section toward the first direction side of the movable iron core,
The movable core is cylindrical,
The decompression part includes a planar part formed over the entire length in the first direction and the second direction in the movable core,
The escape passage is configured by the flat portion,
electromagnetic relay.
The decompression section includes a relief passage in the second housing section for releasing the increased internal pressure of the first housing section to the first direction side of the movable iron core,
The electromagnetic relay according to claim 1.
the relief passage relieves the increased internal pressure of the first accommodating portion between the movable core and the fixed core;
The electromagnetic relay according to any one of claims 2 to 4 .
The escape passage is provided between the inner peripheral surface of the second accommodation portion and the outer peripheral surface of the movable iron core,
The electromagnetic relay according to any one of claims 2 to 5 .
The first accommodating portion has a second through hole through which the drive shaft passes in the first direction and the second direction,
The connection passage is the second through hole,
The electromagnetic relay according to any one of claims 1 to 6 .
The first direction and the second direction are vertical directions,
The movable contact piece is arranged above the fixed contact,
The electromagnetic relay according to any one of claims 1 to 7 .

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