CN219226172U - Double-contact relay - Google Patents

Abstract

A double-contact relay relates to the technical field of electric control devices. The double-contact relay comprises a base and two fixed contacts arranged on the base, wherein the base is connected with a movable contact spring, one end of the movable contact spring is positioned at the side of the fixed contact spring and is provided with two movable contacts corresponding to the fixed contact spring, a partition plate is arranged between the two fixed contacts, a slot hole penetrating through the movable contact spring is arranged on the movable contact spring and is positioned between the two movable contacts, the partition plate corresponds to the position of the slot hole, the thickness of the partition plate is smaller than the width of the slot hole, and after the two movable contact springs are contacted with the two fixed contact springs, the partition plate can penetrate through the slot hole. Above-mentioned scheme sets up the baffle between the stationary contact to set up the slotted hole on movable contact, can not influence normal contact and separation between movable contact and the stationary contact, can prolong the creepage distance between the contact moreover, thereby alleviate the relay when meetting the condition that voltage current is too high, the arc problem that draws that produces easily between the contact.

Description

Double-contact relay

Technical Field

The utility model relates to the technical field of electric control devices, in particular to a double-contact relay.

Background

The existing double-contact relay often has the problem of arc discharge in the use process, mainly because the two movable contacts and the two stationary contacts in the relay are arranged at intervals, and the arc discharge phenomenon is easy to occur due to the fact that the creepage distance is too small when the voltage and the current are too high due to the fact that the interval distance is small.

Disclosure of Invention

The utility model aims to solve the technical problem that the arcing phenomenon easily generated between contacts when the voltage and the current are too high is lightened through the structural improvement of the relay.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a double contact relay, includes the base and establishes two stationary contacts on the base, be connected with movable contact on the base, movable contact's one end is located the side of stationary contact and is provided with two movable contacts corresponding with stationary contact, be provided with the baffle between two stationary contacts, be provided with the slotted hole that runs through movable contact on the movable contact and this slotted hole is located between two movable contacts, the baffle corresponds and the thickness of baffle is less than the width of slotted hole with the position of slotted hole, after two movable contact and two stationary contact, the baffle can pass the slotted hole.

Preferably, the base is provided with an arc extinguishing device, and the arc extinguishing device comprises arc extinguishing magnets which are respectively arranged at two sides of the two stationary contacts.

Preferably, the arc extinguishing device further comprises a metal connection piece connected between the two arc extinguishing magnets.

Preferably, the base is provided with two groups of support plates arranged at intervals, the end parts of the iron cores penetrate through the support plates and are located on the outer end faces of the support plates, the upper ends of the support plates are provided with yokes, and the outer end faces of the support plates are provided with uneven areas including protruding portions and recessed portions in the areas between the yokes and the end parts of the iron cores.

Preferably, the coil is sleeved on the iron core, one end of the yoke is connected with the armature, the other end of the yoke is bent downwards and extends to be inserted into the base, two ends of the movable reed are respectively fixed on the yoke and the armature, leading-out feet connected with the coil are arranged below two sides of the support plate on one side of the bent part of the yoke, and a baffle part which extends upwards from the upper end face of the base to separate the yoke from the leading-out feet is arranged between the leading-out feet and one end of the bent part of the yoke.

Preferably, the movable spring is L-shaped, and a reinforcing spring is connected to the end part of the movable spring, which is connected to the armature, and the other end of the reinforcing spring is fixed on the base.

Preferably, the stationary contact is connected with a first connecting terminal and is arranged at the upper end of the first connecting terminal, the upper end of the first connecting terminal is arranged at the upper end of the base, and a limiting part for propping against the upper end of the first connecting terminal to limit the stationary contact to move towards the moving contact is arranged at the upper end of the base.

Above-mentioned double contact relay sets up the baffle between the stationary contact to set up the slotted hole on movable contact, can not only influence normal contact and separation between movable contact and the stationary contact, can prolong the creepage distance between the contact moreover, thereby alleviate the relay when meetting the condition that voltage current is too high, the easy arc problem that draws that produces between the contact.

Drawings

FIG. 1 is an exploded schematic view of a dual contact relay in an embodiment;

fig. 2 is a perspective view of a dual contact relay in an embodiment;

FIG. 3 is a second perspective view of the dual contact relay in the embodiment;

fig. 4 is a third perspective view of the dual contact relay in the embodiment;

FIG. 5 is a schematic diagram showing the structures of a movable reed and a reinforcing reed in the embodiment;

fig. 6 is a perspective view of a dual contact relay in an embodiment;

fig. 7 is a schematic view showing the structure of the yoke and the support plate in the embodiment;

fig. 8 is a perspective view of a base in an embodiment.

In the figure:

1-base 2-static contact 3-movable reed

3 a-slotted hole 4-movable contact 5-partition board

5 a-first partition plate 5 b-second partition plate 6-arc extinguishing magnet

7-Metal connecting piece 8-supporting plate 8 a-protruding portion

8 b-concave part 9-iron core 10-yoke

11-coil 12-armature 13-leading-out pin

14-a baffle part 15-a reinforced reed 16-a first connecting terminal

17-limit part 18-inner shell 19-outer shell.

Detailed Description

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "front", "rear", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. The term "plurality" means more than two (including two).

The utility model will be further described with reference to examples and drawings, to which reference is made, but which are not intended to limit the scope of the utility model.

As shown in fig. 1 to 8, a double-contact relay comprises a base 1 and two fixed contacts 2 arranged on the base 1, wherein a movable contact spring 3 is connected to the base 1, one end of the movable contact spring 3 is positioned at the side of the fixed contact spring 2 (shown as the left side in fig. 2) and is provided with two movable contacts 4 corresponding to the positions of the fixed contacts 2, a partition plate 5 capable of separating the two fixed contacts 2 is arranged between the two fixed contacts 2, a slot hole 3a penetrating through the movable contact spring 3 is arranged on the movable contact spring 3 and is positioned between the two movable contacts 4, the partition plate 5 corresponds to the position of the slot hole 3a, and the thickness of the partition plate 5 is smaller than the width of the slot hole 3a, so that after the two movable contacts 4 are contacted with the two fixed contacts 2, the partition plate 5 can penetrate through the slot hole 3a. According to the double-contact relay, the partition plate 5 is arranged between the fixed contacts 2, the slotted hole 3a is arranged on the movable reed 3, normal contact and separation between the movable contact 4 and the fixed contacts 2 are not affected, and the creepage distance between the two fixed contacts 2 and between the two movable contacts 4 can be prolonged, so that the problem of arc discharge easily generated between the contacts when the relay encounters the condition of overhigh voltage and current is solved. The slot 3a may be U-shaped, and the spacer 5 may be inserted into and pass through the slot 3a in a gap after the movable contact 4 contacts the stationary contact 2.

In this embodiment, the base 1 is provided with an arc extinguishing device, which includes arc extinguishing magnets 6 respectively disposed at both sides of the two stationary contacts 2, as can be seen in fig. 4. The arc extinguishing device can play an arc extinguishing role in the use process of the relay. The quenching magnet 6 may be a magnetic steel.

In this embodiment, the arc extinguishing device further comprises a metal connection 7 connected between the two arc extinguishing magnets 6, see fig. 4. The metal connecting piece 7 can enable the polarities of the arc extinguishing magnets 6 to be connected, the magnetism of the arc extinguishing magnets 6 is enhanced, and meanwhile the arc extinguishing magnets 6 can be effectively fixed. The metal connection 7 may be hardware.

In the present embodiment, the base 1 is provided with the iron cores 9 by two sets of support plates 8 arranged at intervals, the ends of the iron cores 9 pass through the support plates 8 and are located on the outer end faces of the support plates 8, the upper ends of the support plates 8 are provided with yokes 10, and the outer end faces of the support plates 8 are provided with uneven areas including the convex portions 8a and the concave portions 8b on the areas thereof located between the yokes 10 and the ends of the iron cores 9, as can be seen in fig. 3. Generally, the area between the yoke 10 and the end of the core 9 on the outer end surface of the support plate 8 is a relatively flat plane, so that the creepage distance between the yoke 10 and the core 9 is short, whereas the present utility model can increase the withstand voltage level of the relay by providing the area as an uneven area including the convex portion 8a and the concave portion 8b, so that the creepage distance between the yoke 10 and the core 9 is longer (the curve length is longer than the straight length between the two points). Wherein the uneven area in the present embodiment is provided on the outer end surface of the support plate 8 near the stationary contact 2.

In this embodiment, a coil 11 is sleeved on the iron core 9, one end of a yoke 10 is connected with an armature 12, the other end is bent downwards and extends into the base 1, two ends of a movable spring 3 are respectively fixed on the yoke 10 and the armature 12, lead-out legs 13 connected with the coil 11 are arranged below two sides of a supporting plate 8 positioned on one side of a bent part of the yoke 10, a separation part 14 which extends upwards from the upper end surface of the base 1 to separate the yoke 10 from the lead-out legs 13 is arranged between the lead-out legs 13 and one side of the bent part of the yoke 10, so that the creepage distance between the yoke 10 and the lead-out legs 13 is prolonged, as can be seen in fig. 6-8. In general, the area between the end of the yoke 10 and the lead-out leg 13 is a relatively flat plane (the upper end surface of the base 1), so that the creepage distance between the end of the yoke 10 and the lead-out leg 13 is short, while the creepage distance between the end of the yoke 10 and the lead-out leg 13 is long (the curve length is longer than the straight length between two points) by providing the barrier portion 14 with a certain height between them, so that the withstand voltage level of the relay can be improved. In addition, the blocking part 14 may have a U-shape and be capable of being engaged with the support plate 8 to enclose the end of the yoke 10, wherein the blocking part 14 also functions to position and fix the yoke 10. The end of the yoke 10 is provided with a plugging portion with a width smaller than that of the yoke 10, and the plugging portion can be inserted into the U-shaped blocking portion 14 to be matched with the blocking portion 14, so that good positioning is achieved.

In this embodiment, the movable spring 3 is L-shaped, and the end of the movable spring connected to the armature 12 is connected to the reinforcing spring 15, and the other end of the reinforcing spring 15 is fixed to the base 1, as shown in fig. 2 and 5. The ends of the reinforcing reed 15 may also be fixed to the metal connector 7 mounted on the base 1. The reinforcing reed 15 not only can strengthen the movable reed 3, but also can make the movable reed 3 have better elasticity and better durability. The reinforcing reed 15 can be integrally formed with the movable reed 3, so that the connection firmness between the reinforcing reed and the movable reed is improved.

In this embodiment, the stationary contact 2 is connected to the first connecting terminal 16 and is disposed at an upper end of the first connecting terminal 16, the upper end of the first connecting terminal 16 is disposed at an upper end of the base 1, and a limiting portion 17 for abutting against the upper end of the first connecting terminal 16 to limit the stationary contact 2 moving toward the movable contact 4 is disposed at the upper end of the base 1, as shown in fig. 3 and 8. The limiting portion 17 is located on the side of the first connection terminal 16 close to the movable contact 4, so that the first connection terminal 16 can be fixed more firmly. When the iron core 9 is attracted to the armature 12 and the movable contact 4 approaches the fixed contact 2, the limiting part 17 can perform the limiting function, so that the end part of the first wiring terminal 16 and the fixed contact 2 on the end part cannot move towards the movable contact 4, and the normal operation of the relay is ensured. Two of the stationary contacts 2 are each connected to a first connecting terminal 16.

In this embodiment, the dual-contact relay further includes an inner housing 18 that can be snapped onto the base 1 and an outer housing 19 that is detachably mounted on the inner housing 18, as can be seen in fig. 1. The groove and the protruding clamping position which can be matched with the base 1 and the components on the base 1 are arranged in the inner shell 18, so that after the inner shell 18 is buckled with the base 1, the base 1 and the components on the base 1 can be better fixed, the movement of the base 1 and the components on the base 1 is prevented, and the durability is improved.

Further, as shown in fig. 3, the partition 5 may include a first partition 5a provided on an upper end surface of the base 1 and a second partition 5b provided on the support plate 8, and the first partition 5a and the second partition 5b may be fitted to each other to form the partition 5 in such a manner that: first, the first partition plate 5a and the second partition plate 5b are aligned and joined together to constitute the partition plate 5; second, the first partition plate 5a and the second partition plate 5b are disposed at intervals (for example, parallel to each other) and have overlapping portions, thereby constituting the partition plate 5. The latter mode is adopted in this embodiment, so that assembly between the components can be facilitated.

The present utility model is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any person skilled in the art can make some changes or modifications to the equivalent embodiments without departing from the scope of the present utility model.

Claims (7)

1. A dual contact relay, characterized by: including base (1) and establish two stationary contacts (2) on base (1), be connected with movable contact spring (3) on base (1), the one end of movable contact spring (3) is located the side of stationary contact (2) and is provided with two movable contact (4) corresponding with stationary contact (2), be provided with baffle (5) between two stationary contact (2), be provided with slotted hole (3 a) and this slotted hole (3 a) that run through movable contact spring (3) on movable contact spring (3) and be located between two movable contact (4), baffle (5) correspond with the position of slotted hole (3 a) and the thickness of baffle (5) is less than the width of slotted hole (3 a), after two movable contact (4) and two stationary contact (2) contact, baffle (5) can pass slotted hole (3 a).

2. The dual contact relay of claim 1, wherein: the base (1) is provided with an arc extinguishing device, and the arc extinguishing device comprises arc extinguishing magnets (6) which are respectively arranged at two sides of the two stationary contacts (2).

3. The dual contact relay of claim 2, wherein: the arc extinguishing device also comprises a metal connecting piece (7) connected between the two arc extinguishing magnets (6).

4. The dual contact relay of claim 1, wherein: the iron core (9) is installed through two sets of backup pads (8) that the interval set up on base (1), the tip of iron core (9) passes backup pad (8) and is located the outer terminal surface of backup pad (8), the upper end of backup pad (8) is provided with yoke (10), the outer terminal surface of backup pad (8) is equipped with the unevenness region including bellying (8 a) and depressed part (8 b) on its region that is located between yoke (10) and iron core (9) tip.

5. The dual contact relay of claim 4, wherein: the iron core (9) is sleeved with a coil (11), one end of a yoke (10) is connected with an armature (12), the other end of the yoke is bent downwards and extends into the base (1), two ends of a movable spring (3) are respectively fixed on the yoke (10) and the armature (12), leading-out pins (13) connected with the coil (11) are arranged below two sides of a supporting plate (8) on one side of a bent part of the yoke (10), and baffle parts (14) which extend upwards from the upper end face of the base (1) to separate the yoke (10) from the leading-out pins (13) are arranged between the leading-out pins (13) and the end part on one side of the bent part of the yoke (10).

6. The dual contact relay of claim 5, wherein: the movable reed (3) is L-shaped, the end part of the movable reed, which is connected with the armature (12), is connected with the reinforcing reed (15), and the other end of the reinforcing reed (15) is fixed on the base (1).

7. The dual contact relay of claim 1, wherein: the static contact (2) is connected with a first wiring terminal (16) and is arranged at the upper end of the first wiring terminal (16), the upper end of the first wiring terminal (16) is arranged at the upper end of the base (1), and a limiting part (17) for propping against the upper end of the first wiring terminal (16) to limit the static contact (2) to move towards the direction of the movable contact (4) is arranged at the upper end of the base (1).

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