CN117581325A - Electromagnetic contactor - Google Patents
Electromagnetic contactor Download PDFInfo
- Publication number
- CN117581325A CN117581325A CN202280046377.3A CN202280046377A CN117581325A CN 117581325 A CN117581325 A CN 117581325A CN 202280046377 A CN202280046377 A CN 202280046377A CN 117581325 A CN117581325 A CN 117581325A
- Authority
- CN
- China
- Prior art keywords
- arc extinguishing
- cover
- engagement
- engaging
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009434 installation Methods 0.000 claims abstract description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 238000005192 partition Methods 0.000 description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
An electromagnetic contactor of the present invention comprises a housing (3) in which a contact part (6) having movable contacts (15 a, 15 b) and fixed contacts (13 a, 13 b) is housed in an arc extinguishing chamber (12), and an arc extinguishing cover (7) attached to the housing (3) so as to cover the arc extinguishing chamber. The arc extinguishing cover is provided with first engaging parts (27, 32) and second engaging parts (26, 31) at intervals in the installation direction of the arc extinguishing cover to the shell, the shell is provided with a third engaging part (36) and a fourth engaging part (35), and the arc extinguishing cover is installed on the shell in a first engaging state of the first engaging part and the third engaging part. The arc extinguishing cover is mounted to the housing with a gap therebetween in a second engagement state in which the second engagement portion is engaged with the fourth engagement portion.
Description
Technical Field
The present invention relates to an electromagnetic contactor, and more particularly, to a structure for holding an arc extinguishing cover.
Background
The electromagnetic contactor includes a lower case and an upper case formed of a synthetic resin material having insulation properties, a terminal portion each having a contact is fixed to the upper case, and a contact portion having a movable contact and a fixed contact is housed in an arc extinguishing chamber in the upper case. An electromagnet for driving the contact portion is housed in the lower case. Further, an arc extinguishing cover is attached to the upper case to cover the contact portion in the arc extinguishing chamber.
If an abnormally large current flows to the contact portion of the electromagnetic contactor due to a short-circuit accident or the like, the arc extinguishing cover may blow off due to an increase in the internal pressure of the arc extinguishing chamber caused by the arc gas. For this reason, for example, in the electromagnetic contactor of patent document 1, one of the upper case and the arc extinguishing cover is formed with a first engaging portion and a second engaging portion, the other is formed with a third engaging portion that engages with the first engaging portion and the second engaging portion, the arc extinguishing cover is mounted to the upper case in a first engaging state in which the first engaging portion engages with the third engaging portion, and in a second engaging state in which the second engaging portion engages with the third engaging portion, a gap is provided between the arc extinguishing cover and the upper case, so that generated arc gas is discharged to the outside, and the internal pressure of the arc extinguishing chamber is reduced.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2021-11450
Disclosure of Invention
The invention aims to solve the problems
However, in the electromagnetic contactor of patent document 1, if the third engagement portion is damaged when the first engagement state is shifted to the second engagement state, the engagement force between the damaged third engagement portion and the second engagement portion becomes low, and there is a possibility that the arc extinguishing cover that cannot maintain the second engagement state blows off from the upper case.
Accordingly, an object of the present invention is to provide an electromagnetic contactor capable of discharging arc gas generated in an arc extinguishing chamber to the outside and reliably preventing blowing-off of the arc extinguishing cover by preventing a decrease in engagement force of the arc extinguishing cover with respect to a housing when shifting from a first engagement state to a second engagement state.
Technical scheme for solving problems
In order to achieve the above object, an aspect of the present invention provides an electromagnetic contactor including a housing that houses a contact portion including a movable contact and a fixed contact in an arc extinguishing chamber, and an arc extinguishing cover that is attachable to the housing so as to cover the arc extinguishing chamber, wherein the arc extinguishing cover is formed with a first engaging portion and a second engaging portion at a distance from each other in an attaching direction to the housing, the housing is formed with a third engaging portion and a fourth engaging portion, the arc extinguishing cover is attached to the housing so as to seal the arc extinguishing chamber in a first engaging state in which the first engaging portion and the third engaging portion are engaged, and the arc extinguishing cover is held in the housing with a gap between the arc extinguishing cover and the housing in a second engaging state in which the second engaging portion and the fourth engaging portion are engaged.
Effects of the invention
According to the electromagnetic contactor of the aspect of the present invention, when the first engagement state in which the arc extinguishing chamber is mounted on the housing is shifted to the second engagement state in which the arc extinguishing chamber is provided with the gap between the arc extinguishing chamber and the housing, the arc extinguishing chamber can be reliably prevented from being blown off while the arc extinguishing chamber can be reliably prevented from being discharged to the outside by reliably preventing the engaging force of the arc extinguishing chamber with respect to the housing from decreasing.
Drawings
Fig. 1 is a perspective view showing an electromagnetic contactor according to an embodiment of the present invention.
Fig. 2 is a view showing the electromagnetic contactor from the arc extinguishing hood side.
Fig. 3 is a view showing a state in which the arc extinguishing cover is removed from the upper case of the electromagnetic contactor.
Fig. 4 is a main part sectional view of the IV-IV line of fig. 2.
Fig. 5 is a view showing the arc extinguishing hood from the front side.
Fig. 6 is a view showing the arc extinguishing hood from the rear side.
Fig. 7 is a perspective view showing a shape of the upper case side from which the arc extinguishing cover is removed.
Fig. 8 is a view showing a shape of the upper case side from which the arc extinguishing cover is removed from the front side.
Fig. 9 is a main part sectional view taken along the X-X line in fig. 2, and is a view showing a first engagement state in which an arc extinguishing cover is attached to the upper case.
Fig. 10 is a main part sectional view showing a second engagement state in which the arc extinguishing cover is mounted to the upper case with a gap therebetween.
Detailed Description
Next, an embodiment of the present invention will be described with reference to the drawings. In the description of the drawings below, the same or similar parts are denoted by the same or similar reference numerals. It should be noted, however, that the drawings are schematic, and the relationship of thickness and planar dimensions, the ratio of thicknesses of the respective layers, and the like are different from reality. Accordingly, the specific thickness and dimensions should be determined with reference to the following description. The drawings include, of course, portions having different dimensional relationships and ratios.
The following embodiments are presented to illustrate an apparatus and a method for embodying the technical idea of the present invention, and the technical idea of the present invention is not intended to identify the materials, shapes, structures, arrangements, etc. of constituent parts as the following technical idea. The technical idea of the present invention can be variously modified within a technical scope defined in a scope of claims described in the scope of claims.
In the following description, terms "left", "right", "front", "rear", "upper" and "lower" are used with reference to the directions shown in fig. 1.
As shown in fig. 1 and 2, an electromagnetic contactor 1 according to an embodiment of the present invention includes a lower case 2 and an upper case 3 which are divided vertically and made of an insulating synthetic resin material. The upper case 3 is provided with power supply side terminal portions 4a1 to 4c1 of the main circuit, load side terminal portions 4a2 to 4c2 of the main circuit, auxiliary power supply side terminal portion 4d1, auxiliary load side terminal portion 4d2, and an arc extinguishing cover 7 for sealing an arc extinguishing chamber 12 described later. An electromagnet (not shown) that drives a contact portion 6 described below is housed in the lower case 2, and a pair of coil terminals 4e for the electromagnet are fixed to the lower case 2.
Fig. 3 shows a state in which the arc extinguishing cover 7 is removed from the upper case 3 of the electromagnetic contactor 1. A pair of main circuit case walls 10a and 10b are formed in the upper case 3 at intervals in the left-right direction and continuously extend in the front-rear direction, and two pairs of case partition walls 11a1, 11a2 and 11b1, 11b2 are formed at intervals in the front-rear direction in parallel with each other between the main circuit case walls 10a and 10 b. Further, an auxiliary circuit case wall 11c is formed in parallel on the outer side of the main circuit case wall 10 a. Further, the main circuit power supply side terminal portions 4a1 to 4c1 and the main circuit load side terminal portions 4a2 to 4c2 are arranged between the pair of main circuit housing walls 10a and 10b and the housing partition walls 11a1 and 11b2, and the auxiliary power supply side terminal portion 4d1 and the auxiliary load side terminal portion 4d2 are arranged between the main circuit housing wall 10a and the auxiliary circuit housing wall 11c.
Further, the contact portion 6 is disposed in a central portion surrounded by a pair of main circuit housing walls 10a, 10b and housing partition walls 11a, 11b of the upper housing 3, and the arc extinguishing chamber 12 is provided in a sealed state by attaching the arc extinguishing cover 7 to the upper housing 3 as shown in fig. 4.
As shown in fig. 4, the contact portion 6 includes: the fixed contacts 13a of the power source side terminal portions 4a1 to 4c1 of the main circuit (only the fixed contact 13a of the power source side terminal portion 4b1 of the main circuit is shown in fig. 4), the fixed contacts 13b of the load side terminal portions 4a2 to 4c2 of the main circuit (only the fixed contact 13b of the load side terminal portion 4b2 is shown in fig. 4), and the movable contact 15 supported by the contact support 14 and having the movable contacts 15a, 15b in contact with/separated from the fixed contacts 13a, 13 b. When an exciting coil (not shown) constituting the electromagnet is excited, the contact support 14 moves downward in fig. 4 together with the movable iron core 16, and the movable contacts 15a and 15b are brought into contact with the fixed contacts 13a and 13 b.
As shown in fig. 3, the arc extinguishing hood 7 includes a plate-shaped hood main body 20, and a first hood wall portion 21 and a second hood wall portion 22 formed so as to face each other from the edges of the hood main body 20 in the front-rear direction. Fig. 5 shows a view of the arc extinguishing cover 7 shown in fig. 3 before being attached to the upper case 3, as viewed from the front, and fig. 6 shows a view of the arc extinguishing cover 7 shown in fig. 3, as viewed from the rear.
As shown in fig. 5, the first cover wall portion 21 is formed with an auxiliary side partition wall 23 and power supply side partition walls 24a to 24c at intervals in the left-right direction, and cover side engaging portions 25a to 25f are formed at both edges of the power supply side partition walls 24a to 24c in the left-right direction, and the cover side engaging portions 25a to 25f protrude from positions inside the outer surfaces of the power supply side partition walls 24a to 24c in the left-right direction to extend in the up-down direction. The second hook 26 is formed at a lower position spaced apart from the cover main body 20 of each of the cover-side engaging portions 25a to 25 f. Further, a first hook 27 is formed at a cover-side engaging portion 25b formed at the left edge of the power-supply-side partition wall 24a at a position above the cover main body 20 than the second hook 26. Further, a first hook 27 is also formed at a cover-side engaging portion 25e formed at the right edge of the power-supply-side partition wall 24c at a position above the cover main body 20 than the second hook 26.
As shown in fig. 6, the second cover wall 22 is formed with an auxiliary side partition 28 and load side partitions 29a to 29c at intervals in the lateral direction, and cover side engaging portions 30a to 30f are formed at both edges of the load side partitions 29a to 29c in the lateral direction, and the cover side engaging portions 30a to 30f protrude from positions inside the outer surfaces of the load side partitions 29a to 29c in the lateral direction to the outside in the lateral direction and extend in the vertical direction. The second hook 31 is formed at a lower position spaced apart from the cover main body 20 of each of the cover-side engaging portions 30a to 30 f. Further, a first hook 32 is formed at a cover-side engaging portion 30b formed at the left edge of the load-side bulkhead 29a at a position above the cover main body 20 than the second hook 31. Further, a first hook 32 is also formed at a cover-side engaging portion 30e formed at the right edge of the load-side bulkhead 29c at a position above the cover main body 20 than the second hook 31.
On the other hand, as shown in fig. 7, cover-side engaging portions 33a to 33d are formed inside (on the side close to the contact portion 6) the pair of main circuit housing walls 10a, 10b and the housing partition walls 11a1, 11a2 of the upper housing 3. The cover-side engaging portion 33a is a plate-like portion extending continuously in the left-right direction from a part of the main circuit housing wall 10a, and the cover-side engaging portion 33d is a plate-like portion extending continuously in the left-right direction from a part of the main circuit housing wall 10 b. The cover-side engaging portions 33b and 33C are C-shaped members extending continuously in the left-right direction from a part of the case partitioning walls 11a1 and 11a 2. The engagement stabilizing plates 34a to 34f are formed in parallel at positions spaced rearward relative to the cover-side engagement portions 33a to 33d.
As shown in fig. 8, the surfaces of the hood-side engaging portions 33a to 33d facing the lowermost direction are second hook engaging portions 35 that engage with the second hook portions 26 provided in the hood-side engaging portions 25a to 25f of the first hood wall portion 21 of the arc extinguishing hood 7, respectively. The surfaces of the C-shaped cutout portions of the cover-side engaging portions 33b and 33C facing downward are first hook engaging portions 36 that engage with the first hook portions 27 provided in the cover-side engaging portions 25b and 25e of the first cover wall portion 21.
Although not shown, cover-side engaging portions 33a to 33d of the same shape are also formed on the inner sides (the side close to the contact portion 6) of the pair of main circuit housing walls 10a and 10b and the housing partition walls 11b1 and 11b2 of the upper housing 3. Further, second hook engaging portions 35 that engage with the second hook portions 31 provided in the hood-side engaging portions 30a to 30f of the second hood wall portion 22 of the arc extinguishing hood 7 are formed in the hood-side engaging portions 33a to 33d. Further, first hook engaging portions 36 are formed to engage with the first hook portions 32 provided in the cover-side engaging portions 30b, 30e of the second cover wall portion 22. Further, engagement stabilizing plates 34a to 34f are formed in parallel at positions spaced forward relative to the cover-side engaging portions 33a to 33d.
Next, fig. 9 is a main part sectional view taken along the X-X line of fig. 2, and is a view showing the electromagnetic contactor 1 in which the arc extinguishing cover 7 is attached to the upper case 3. The vertical direction in fig. 9 is referred to as the installation direction of the arc suppression cover 7.
As shown in fig. 9, the second hook engaging portions 35 and the first hook engaging portions 36 provided on the front side and the rear side of the upper case 3 are formed as engaging surfaces orthogonal to the mounting direction of the arc extinguishing cover 7.
In fig. 9, the hood-side engaging portion 25b of the first hood wall portion 21 disposed on the front side and the hood-side engaging portion 30b of the second hood wall portion 22 disposed on the rear side are disposed along the installation direction of the arc extinguishing hood 7, but the hood-side engaging portions 25a, 25c to 25f of the first hood wall portion 21 and the hood-side engaging portions 30a, 30c to 30 of the second hood wall portion 22 are also disposed along the installation direction of the arc extinguishing hood 7. Further, hook engaging surfaces 26a, 31a orthogonal to the mounting direction of the arc extinguishing cover 7 are formed on the upper surfaces of the second hook portions 26 provided in the cover-side engaging portions 25a to 25f of the first cover wall portion 21 and the second hook portions 31 provided in the cover-side engaging portions 30a to 30f of the second cover wall portion 22.
The first hook 27 of the first cover wall 21 provided in the cover-side engaging portion 25b, the first hook 27 provided in the cover-side engaging portion 25e (see fig. 5), the first hook 32 of the second cover wall 22 provided in the cover-side engaging portion 30b, and the first hook 32 provided in the cover-side engaging portion 30e (see fig. 6) are formed so as to protrude in a triangular cross section.
The first hook 27 of the first cover wall 21 engages with the first hook engagement portion 36 on the front side of the upper case 3, and the first hook 32 of the second cover wall 22 engages with the first hook engagement portion 36 on the rear side of the upper case 3.
Further, with respect to the arc extinguishing cover 7 attached to the upper case 3, the auxiliary side partition wall 23 and the power side partition walls 24a to 24c of the first cover wall portion 21 partition the auxiliary power side terminal portion 4d1 and the power side terminal portions 4a to 4c1 from the contact portion 6, and the auxiliary side partition wall 29 and the load side partition walls 29a to 29c of the second cover wall portion 22 partition the auxiliary load side terminal portion 4d2 and the load side terminal portions 4a2 to 4c2 from the contact portion 6, and the cover main body 20 covers the upper portion of the contact portion 6, thereby sealing the arc extinguishing chamber 12. As shown in fig. 7, the upper case 3 is formed with engagement stabilizing plates 34a to 34f, and these engagement stabilizing plates 34a to 34f are disposed along the vicinity of the rear sides of the hood-side engaging portions 25a to 25f of the first hood wall portion 21, and also along the vicinity of the front sides of the hood-side engaging portions 30a to 30f of the second hood wall portion 22.
In the electromagnetic contactor 1, an abnormally large current flows through the contact portion 6 due to a short-circuit accident or the like, and the internal pressure of the arc extinguishing chamber 12 excessively rises due to the generated arc gas, so that the arc extinguishing cover 7 is separated from the upper case 3 and is intended to float.
Here, when the internal pressure of the arc extinguishing chamber 12 excessively increases, the hood-side engaging portions 25b, 25e of the first hood wall portion 21 elastically deform rearward, and the hood-side engaging portions 30b, 30e of the second hood wall portion 22 elastically deform forward, whereby the first hook engaging portion 36 of the front side of the upper case 3 is disengaged from the engaged state of the first hook portion 27, and the first hook engaging portion 36 of the rear side of the upper case 3 is disengaged from the engaged state of the first hook portion 32.
Then, as shown in fig. 10, the arc extinguishing cover 7 floats up relative to the upper case 3, and the hook engaging surfaces 26a of the second hooks 26 at the six positions of the first cover wall portion 21 come into contact with the second hook engaging portions 35 at the front sides of the six positions of the upper case 3, and the hook engaging surfaces 31a of the second hooks 31 at the six positions of the second cover wall portion 22 come into contact with the second hook engaging portions 35 at the rear sides of the six positions of the upper case 3, thereby maintaining the engagement between the second hooks 26, 31 and the second hook engaging portions 35. Thereby, a gap is formed between the cover main body 20 of the arc extinguishing cover 7 and the upper portion of the upper case 3, and this gap serves as an exhaust hole, and the arc gas in the arc extinguishing chamber 12 is discharged to the outside, so that the internal pressure of the arc extinguishing chamber 12 is reduced, and the arc extinguishing cover 7 is prevented from blowing off.
Here, a state in which the first hooks 27, 32 of the arc extinguishing cover 7 are engaged with the first hook engaging portion 36 of the upper case 3, and the arc extinguishing cover 7 is mounted hermetically to the upper case 3 is referred to as a first engaged state. The second hooks 26 and 31 of the arc extinguishing cover 7 are engaged with the second hook engaging portion 35 of the upper case 3, and the state in which the arc extinguishing cover 7 is attached to the upper case 3 with a gap between the upper case 3 and the arc extinguishing cover 7 is referred to as a second engaging state.
Next, the operational effects of the electromagnetic contactor 1 of the present embodiment will be described.
In the present embodiment, in the first engagement state in which the arc extinguishing chamber 12 is hermetically mounted to the upper case 3 by the arc extinguishing cover 7, the first hook portions 27, 32 provided to the arc extinguishing cover 7 engage with the first hook engagement portion 36 provided to the upper case 3. When the internal pressure of the arc extinguishing chamber 12 excessively increases due to the arc gas, the first hook engagement portion 36 having a weak engagement force is disengaged from the engagement of the first hook portions 27 and 32, and the second hook engagement portion 35 provided in the upper case 3 is engaged with the second hook portions 26 and 31 provided in the arc extinguishing cover 7 with a strong engagement force, so that the arc extinguishing chamber 12 is brought into a second engagement state having a gap between the arc extinguishing cover 7 and the upper case 3, and therefore, the arc gas in the arc extinguishing chamber 12 can be discharged to the outside, and the arc extinguishing cover 7 can be reliably prevented from being blown off from the upper case 3.
In the first engagement state, the first hook engagement portion 36 of the upper case 3 engages with the first hook portions 27, 32 of the arc extinguishing cover 7, in the second engagement state, the second hook engagement portion 35 of the upper case 3 engages with the second hook portions 26, 31 of the arc extinguishing cover 7, and in the first engagement state and the second engagement state, different portions of the arc extinguishing cover 7 are engaged. Therefore, the problem of the conventional technique, that is, the arc extinguishing cover 7 or the upper case 3 uses the same engaging portion in the first engaging state and the second engaging state, and the engaging portion is damaged when the state is shifted from the first engaging state to the second engaging state, and the second engaging state cannot be maintained, does not occur. Therefore, for example, even if a part of the engagement portions (the first hook engagement portions 36, the first hook portions 27, 32) in the first engagement state is damaged by a rapid increase in the internal pressure of the arc extinguishing chamber 12, the engagement force in the second engagement state is not reduced.
When the arc extinguishing hood 7 is shifted from the first engagement state to the second engagement state, if the hood-side engagement portions 25a to 25f formed in the first hood wall portion 21 are greatly displaced rearward and the hood-side engagement portions 30a to 30f formed in the second hood wall portion 22 are greatly displaced rearward, the engagement stabilizing plates 34a to 34f provided in the upper case 3 come into contact with the hood-side engagement portions 25a to 25f and 30a to 30f, thereby restricting the large displacement. Therefore, the second hook engagement portion 35 and the second hook portions 26 and 31 can be engaged with each other at all times when the state is shifted from the first engagement state to the second engagement state.
Description of the reference numerals
1 electromagnetic contactor 1
2 lower shell
3 upper shell (Shell)
4a1, 4b1, 4c1 main circuit power supply side terminal portion
Load side terminal portions of main circuits 4a2, 4b2, and 4c2
4d1 auxiliary power supply side terminal part
4d2 auxiliary load side terminal portion
4e coil terminal
6 contact point part
7 arc extinction cover
8 terminal cover
10a, 10b housing wall for main circuit
11a1, 11a2, 11b1, 11b2 housing partition walls
11c is casing wall for auxiliary circuit
12 arc extinguishing chamber
13a fixed contact
13b fixed contact
14 contact support
15 movable contact
15a, 15b movable contact
16 movable iron core
20 cover body
21 first hood wall
22 second mask wall portion
23 auxiliary side dividing wall
24a, 24b, 24c power supply side wall
25 a-25 f cover side engaging portions
26 second hook (second engaging part)
26a hook engaging surface (second engaging surface)
27 first hook (first engaging part)
28 auxiliary side dividing wall
29a, 29b, 29c load side dividing wall
30 a-30 f cover side engaging portions
31 second hook (second engaging part)
31a hook engaging surface (second engaging surface)
32 first hook (first engaging part)
33a to 33d cover side engaging portions
34a to 34f engagement stabilizing plate (engagement stabilizing portion)
35 second hook engaging portion (fourth engaging portion)
36 a first hook engaging portion (third engaging portion).
Claims (5)
1. An electromagnetic contactor having a housing in which a contact portion having a movable contact and a fixed contact is housed in an arc extinguishing chamber, and an arc extinguishing cover that can be attached to the housing so as to cover the arc extinguishing chamber, characterized in that,
the arc extinguishing cover is provided with a first clamping part and a second clamping part which are separated at intervals in the installation direction of the arc extinguishing cover to the shell,
the shell is provided with a third clamping part and a fourth clamping part,
in a first engagement state in which the first engagement portion is engaged with the third engagement portion, the arc extinguishing cover is attached to the housing so as to seal the arc extinguishing chamber,
in a second engagement state in which the second engagement portion is engaged with the fourth engagement portion, the arc extinguishing cover is held by the housing with a gap between the arc extinguishing cover and the housing.
2. The electromagnetic contactor according to claim 1, wherein,
the first engagement state is weaker in engagement force between the engagement portions than the second engagement state.
3. An electromagnetic contactor according to claim 1 or 2, wherein,
the arc extinguishing hood has a plate-shaped hood body and at least one pair of hood wall portions extending from the hood body in the mounting direction opposite to each other,
the second engagement portion is formed at a position of the pair of cover wall portions that is farther from the cover main body, and the first engagement portion is formed at a position of the pair of cover wall portions that is closer to the cover main body.
4. An electromagnetic contactor according to claim 1 or 2, wherein,
the third engaging portion and the fourth engaging portion of the housing have engaging surfaces orthogonal to the installation direction of the arc extinguishing cover,
the first engaging portion of the arc extinguishing cover has a slope slidable with respect to the engaging surface of the third engaging portion of the housing,
the second engagement portion of the arc extinguishing cover has a second engagement surface capable of abutting against the engagement surface of the fourth engagement portion in an orthogonal manner to the mounting direction.
5. An electromagnetic contactor according to claim 1 or 2, wherein,
the housing is provided with an engagement stabilizing portion that suppresses excessive deformation of the second engagement portion formed in the arc extinguishing cover to stabilize the second engagement state when the first engagement state is shifted to the second engagement state.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022002928 | 2022-01-12 | ||
| JP2022-002928 | 2022-01-12 | ||
| PCT/JP2022/045155 WO2023135992A1 (en) | 2022-01-12 | 2022-12-07 | Electromagnetic contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117581325A true CN117581325A (en) | 2024-02-20 |
Family
ID=87278928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280046377.3A Pending CN117581325A (en) | 2022-01-12 | 2022-12-07 | Electromagnetic contactor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7487852B2 (en) |
| KR (1) | KR20240011830A (en) |
| CN (1) | CN117581325A (en) |
| WO (1) | WO2023135992A1 (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59144734U (en) * | 1983-03-16 | 1984-09-27 | 株式会社日立製作所 | electromagnetic contactor |
| JPS62226522A (en) * | 1986-03-27 | 1987-10-05 | 三菱電機株式会社 | Electromagnetic contactor |
| JP4848887B2 (en) * | 2006-08-16 | 2011-12-28 | 富士電機機器制御株式会社 | Magnetic contactor |
| KR200451950Y1 (en) * | 2008-12-04 | 2011-01-25 | 엘에스산전 주식회사 | Single-phase magnetic contactor |
| JP5018845B2 (en) * | 2009-08-20 | 2012-09-05 | 富士電機機器制御株式会社 | Magnetic contactor |
| CN203573915U (en) * | 2013-10-30 | 2014-04-30 | 三菱电机株式会社 | Installation structure of cover member of electromagnetic contactor and cover member of electromagnetic contractor |
| CN204348624U (en) * | 2015-01-12 | 2015-05-20 | 厦门宏发开关设备有限公司 | A kind of contactor cover |
| JP7025033B2 (en) | 2019-07-06 | 2022-02-24 | 健太郎 上手 | Methods to treat or prevent bleeding in aquatic animals and hemostatic agents for aquatic animals |
| EP4036951A4 (en) * | 2020-03-12 | 2023-04-05 | Fuji Electric FA Components & Systems Co., Ltd. | Electromagnetic contactor |
-
2022
- 2022-12-07 KR KR1020237044881A patent/KR20240011830A/en unknown
- 2022-12-07 WO PCT/JP2022/045155 patent/WO2023135992A1/en active Application Filing
- 2022-12-07 CN CN202280046377.3A patent/CN117581325A/en active Pending
- 2022-12-07 JP JP2023573905A patent/JP7487852B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20240011830A (en) | 2024-01-26 |
| WO2023135992A1 (en) | 2023-07-20 |
| JP7487852B2 (en) | 2024-05-21 |
| JPWO2023135992A1 (en) | 2023-07-20 |
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