CN219321258U

CN219321258U - Electromagnetic relay

Info

Publication number: CN219321258U
Application number: CN202320329498.0U
Authority: CN
Inventors: 何仲波; 池言; 代文广; 钟叔明
Original assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Current assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-07-07
Anticipated expiration: 2033-02-27

Abstract

The utility model provides an electromagnetic relay, which comprises a base, an electromagnetic system, a contact system and a pushing card, wherein a partition wall is arranged on the base along the height direction so as to partition the inner space of the base into an upper chamber for installing the electromagnetic system and a lower chamber for installing the contact system; the partition wall is in an inverted L shape, so that the upper chamber is in an L-shaped structure and comprises a transverse extending part and a longitudinal extending part which are mutually perpendicular, and the longitudinal extending part extends downwards to the lower surface of the base so as to be penetrated by pins of the electromagnetic system; the contact system is located on the other side of the lower chamber length from the longitudinal extension. The structure of the base is improved so as to strengthen the creepage isolation design; the distance between the electromagnetic system and the contact system is increased, and effective isolation between the dynamic spring and the static spring is ensured; and ensuring stable installation of the contact system, the electromagnetic system and the base.

Description

Electromagnetic relay

Technical Field

The utility model relates to the field of relays, in particular to an electromagnetic relay.

Background

Electromagnetic relay is an electronic control device, which uses electromagnet to control the on-off of working circuit, and is widely used in the fields of automatic control and communication. Typical design structures for electromagnetic relays include a base, a pusher card, an electromagnetic system, and a contact system; the electromagnetic system and the contact system are respectively arranged on the base; the contact system comprises a movable spring part and a static spring part, one end of a pushing card is connected with an armature of the electromagnetic system, and the other end of the pushing card is connected with a movable spring of the movable spring part, so that the electromagnetic system drives a movable contact of the movable spring part to contact or separate from a static contact of the static spring part by controlling the movement of the armature so as to switch between a self-holding state in which the contacts are contacted and a resetting state in which the contacts are separated, thereby realizing on/off _。

Along with the development of science and technology, the size of an electromagnetic relay tends to be miniaturized, so that the isolation distance between an electromagnetic system and a contact system and between a moving spring and a static spring is reduced, the layout of a base and each component on the base in the prior art is difficult to meet the creepage isolation requirement, and the problems of an arc circuit and the like are easy to occur; and in the long-term use process, the connection of the electromagnetic system and the contact system is easy to loose and shift.

Disclosure of Invention

Therefore, the utility model provides an electromagnetic relay to strengthen creepage isolation design; the distance between the electromagnetic system and the contact system is increased, and effective isolation between the dynamic spring and the static spring is ensured; and ensuring stable installation of the contact system, the electromagnetic system and the base.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

an electromagnetic relay comprises a base, an electromagnetic system, a contact system and a pushing card, wherein a partition wall is arranged on the base along the height direction so as to divide the inner space of the base into an upper chamber for installing the electromagnetic system and a lower chamber for installing the contact system; the partition wall is in an inverted L shape, so that the upper chamber is in an L-shaped structure and comprises a transverse extending part and a longitudinal extending part which are mutually perpendicular, and the longitudinal extending part extends downwards to the lower surface of the base so as to be penetrated by pins of the electromagnetic system; the contact system is located on the other side of the lower chamber length from the longitudinal extension.

Further, the contact system comprises a movable contact point assembly and a fixed contact point assembly, wherein the movable contact point assembly comprises a movable reed transversely arranged and a movable contact point arranged at one end of the movable reed; the static contact assembly comprises a static reed and a static contact arranged on the static reed, the static contact is correspondingly matched with the movable contact, and the positions of the static contact and the movable contact are located at the other side of the lower cavity, which is far away from the longitudinal extension part, in the length direction.

Further, the movable contact assembly further comprises a movable spring lead-out sheet, one end of the movable spring lead-out sheet is fixedly connected with one end of the movable spring, which is far away from the movable contact, a movable spring pin is arranged at the other end of the movable spring lead-out sheet, and the movable spring lead-out sheet extends along the length direction of the lower cavity so that the movable spring pin is far away from the pin of the electromagnetic system.

Further, the static reed is provided with a static reed pin, and the static reed pin is positioned at one side of the lower cavity, which is far away from the longitudinal extension part, in the length direction, and is respectively arranged at two sides of the lower cavity along the width direction with the movable reed pin.

Further, the fixed connection ends of the movable reed and the movable reed leading-out sheet are close to the longitudinal extension part, and a limiting clamping groove for inserting the movable reed and the movable reed leading-out sheet is arranged in the lower cavity at the position where the movable reed and the movable reed leading-out sheet are fixedly connected.

Further, the lower chamber is provided with a limit seat for receiving the fixed connection end of the movable reed leading-out piece and the movable reed, and the limit clamping groove is a semi-closed groove surrounded by the upper wall of the lower chamber, the side surface of the longitudinal extension part and the upper surface of the limit seat.

Furthermore, the lower cavity is further provided with a hollowed-out groove capable of preventing shrinkage of injection molding in the space below the limiting clamping groove, and the hollowed-out groove is formed along the width direction of the base.

Further, the movable reed leading-out sheet comprises a connecting section fixedly connected with the movable reed, an extending section parallel to the connecting section and a slope positioned between the connecting section and the extending section, so that the movable reed leading-out sheet and the movable reed are approximately in a V-shaped structure after being fixedly connected; the shape of the limiting seat is corresponding to the connecting section and the slope of the movable reed leading-out sheet.

Further, an abutting plate is further arranged in the lower cavity and abuts against the upper surface of the movable reed leading-out sheet so as to limit the movable reed leading-out sheet.

Further, the first end of the pushing card is connected with the armature assembly of the electromagnetic system, the second end of the pushing card is connected with the movable spring of the contact system, and sliding grooves are respectively formed in the front side and the rear side of the base at the position of the first end of the pushing card so that the pushing card can slide up and down in the sliding grooves.

The technical scheme provided by the utility model has the following beneficial effects:

firstly, the utility model adopts the upper and lower layered design of the base to respectively install the electromagnetic system and the contact system so as to increase the distance between strong and weak current in a limited space and enhance the isolation between strong and weak current; secondly, the partition wall of the base is in an inverted L shape, so that pins of an electromagnetic system in the upper cavity can be penetrated to the lower surface of the base without passing through the lower cavity, and the isolation effect of the upper cavity and the lower cavity is ensured; finally, the contact system is positioned at the other side of the lower chamber, which is far away from the longitudinal extension part in the length direction, so that the electromagnetic system and the contact system are mutually far away in the length direction, and the isolation effect of the electromagnetic system and the contact system is ensured.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of another angle of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 shows a cross-sectional view of the present utility model;

FIG. 5 is a schematic view of the base of the present utility model;

fig. 6 shows a top view of the base of the present utility model.

Description of the reference numerals:

1-base, 11-dividing wall, 12-upper chamber, 121-lateral extension, 122-longitudinal extension, 13-lower chamber, 130-limit seat, 131-limit clamping groove, 132-hollowed groove, 133-abutting plate, 14-clamping groove and 15-sliding groove;

the device comprises a 2-electromagnetic system, a 21-yoke, a 22-iron core, a 23-armature assembly and pins of a 20-electromagnetic system;

3-contact system, 31-movable contact assembly, 311-movable reed, 312-movable contact, 313-movable reed leading piece, 310-movable reed pin, 32-stationary contact assembly, 321-stationary contact, 322-stationary reed, 320-stationary reed pin, 4-push card.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

The utility model will now be further described with reference to the drawings and detailed description.

Referring to fig. 1 to 6, the present embodiment provides an electromagnetic relay including a base 1, an electromagnetic system 2, a contact system 3, and a pusher card 4, as shown with reference to fig. 1 and 2. The base 1 is provided with a dividing wall 11 in the height direction to divide the interior space of the base 1 into an upper chamber 12 in which the electromagnetic system 2 is installed and a lower chamber 13 in which the contact system 3 is installed. In this embodiment, the direction of the base 1 in a fixed use state is described, that is, the side of the upper chamber 12 of the base 1 is the upper side, the other side far from the upper side is the lower side, and the front and rear sides are located on a vertical plane and perpendicular to the upper and lower sides. Wherein the contact system 3 comprises a movable contact assembly 31 and a stationary contact assembly 32; the electromagnetic system 2 includes a yoke 21, a core 22, an armature assembly 23, a coil bobbin, and a coil wound on the coil bobbin, wherein the core 22 is disposed through the coil bobbin, and specifically, the core 22 may be a cylindrical electromagnetic pure iron core, the core 22 is disposed through a middle hole of the coil bobbin, and the core 22 may be in interference fit with the middle hole so as to be assembled in the coil bobbin. The first end of the push card 4 is connected with the armature assembly 23 of the electromagnetic system 2, and the second end of the push card 4 is connected with the movable spring 311 of the contact system 3, so that the movable contact 312 of the movable contact assembly 31 is driven to be contacted with or separated from the fixed contact 321 of the fixed contact assembly 32 by controlling the movement of the armature assembly 23, and the switch is realized between a self-holding state in which the contacts are contacted and a reset state in which the contacts are separated.

In this embodiment, referring to fig. 4 and 6, the partition wall 11 is inverted in shape of an "L" so that the upper chamber 12 has an "L" structure, and includes a transverse extension 121 and a longitudinal extension 122 that are perpendicular to each other; the longitudinal extension 122 extends downwards to the lower surface of the base 1 to be penetrated by the pins 20 of the electromagnetic system 2; the contact system 3 is located on the other side of the lower chamber 13 in the length direction from the longitudinal extension 122. Thus, the susceptor 1 is partitioned into the upper chamber 12 and the lower chamber 13 by the partition wall 11 to increase the distance between strong and weak currents in a limited space, enhancing the isolation between strong and weak currents; the partition wall 11 of the base 1 is in an inverted L shape, so that pins of the electromagnetic system 2 positioned in the upper cavity 12 can penetrate to the lower surface of the base 1 without passing through the lower cavity 13, thereby ensuring the isolation effect of the upper cavity 12 and the lower cavity 13; finally, the contact system 3 is arranged on the other side of the base 1 far away from the pins of the electromagnetic system 2, so that the pins 20 of the electromagnetic system 2 and the contact system 3 are respectively arranged on the two sides of the base 1 along the length direction, and the isolation effect of the two can be further enhanced.

Specifically, referring to fig. 4, the movable contact assembly 31 of the contact system 3 includes a movable contact spring 311 disposed transversely, and a movable contact 312 disposed at one end of the movable contact spring 311; the stationary contact assembly 32 of the contact system 3 comprises a stationary contact spring 322 and a stationary contact 321 arranged on the stationary contact spring 322, the stationary contact 321 is correspondingly matched with the movable contact 312, and the stationary contact 321 and the movable contact 312 are positioned at the other side of the lower chamber 13 far from the longitudinal extension 122 in the length direction. In this way, mutual isolation of the pins 20 of the electromagnetic system 2 from the stationary contact 321 and the movable contact 312 of the contact system 3 is ensured.

As shown in fig. 2 and 4, the movable contact assembly 31 further includes a movable spring lead 313, one end of the movable spring lead 313 is fixedly connected with one end of the movable spring 311 away from the movable contact 312, the other end of the movable spring lead 313 is provided with a movable spring pin 310, and the movable spring lead 313 extends along the length direction of the lower chamber 13, so that the movable spring pin 310 is far away from the pin 20 of the electromagnetic system 2. In this embodiment, the movable spring pin 310 is disposed on the movable spring lead 313, and the movable spring lead 313 extends along the length direction of the base, so as to separate the movable spring pin 310 from the pin 20 of the electromagnetic system 2. Further, the static spring 322 is provided with a static spring pin 320, and the static spring pin 320 is located at one side of the lower chamber 13 away from the longitudinal extension 122 in the length direction and is separated from the movable spring pin 310 at two sides of the lower chamber 13 in the width direction. In this way, under the premise of ensuring the current carrying of the movable contact assembly and the static contact assembly, the space of the base 1 is utilized to the greatest extent, so that the isolation of the movable spring pin 310 and the static spring pin 320 is increased, and the effective isolation of the movable spring pin and the static spring pin is realized.

As shown in fig. 2 to 5, in order to ensure stable limit of the movable reed 311 and the movable reed drawing piece 313, the fixed connection ends of the movable reed 311 and the movable reed drawing piece 313 are close to the longitudinal extension 122, and a limit slot 131 for inserting the movable reed 311 and the movable reed drawing piece 313 is provided in the position of the lower chamber 13 where they are fixedly connected. In this embodiment, the lower chamber 13 is provided with a limiting seat 130 for receiving the fixed connection ends of the movable reed drawing-out piece 313 and the movable reed 311, and the limiting slot 131 is a semi-closed slot surrounded by the upper wall of the lower chamber 13, the side surface of the longitudinal extension 122 and the limiting seat 130. Specifically, the movable reed drawing piece 313 includes a connecting section fixedly connected to the movable reed 311, an extending section parallel to the connecting section, and a slope between the connecting section and the extending section, so that the movable reed 311 and the movable reed drawing piece 313 are substantially V-shaped after being fixedly connected. Correspondingly, the shape of the limit seat 130 is correspondingly consistent with the shape of the connecting section and the slope of the movable reed leading-out sheet 313 so as to be received on the lower surface of the movable reed leading-out sheet 313; the limit clamping groove 131 is a semi-closed groove surrounded by the upper wall of the lower chamber 13, the side surface of the longitudinal extension 122, and the limit seat 130 at the position of the connecting section. In order to ensure that the upper surface of the lower chamber 13 also extends downwards to form a side wall for abutting against the fixed connection ends of the movable reed 311 and the movable reed leading-out piece 313, the movable contact assembly 31 is ensured to be stably limited in the lower chamber of the base 1 by the limiting clamping groove 131, and the position of the movable contact assembly 31 is prevented from being deviated. The clamping groove 131 is easy to shrink in the injection molding process of the base 1, so that the molding is affected, and accordingly, a hollow groove 132 for preventing shrink is formed in the lower space of the limiting clamping groove 131 in the lower cavity; specifically, the hollow groove 132 is formed along the width direction of the base; so as to facilitate injection molding of the base 1 and avoid deformation of the base 1 to affect stable limit of the movable contact assembly 31.

In this embodiment, as shown in fig. 5, an abutting plate 133 is further disposed in the lower chamber 13, and the abutting plate 133 abuts against the upper surface of the movable contact spring pulling-out plate 313 to limit the movable contact spring pulling-out plate 313, so as to ensure stable connection between the movable contact assembly 31 and the base 1.

In order to ensure stable installation of the electromagnetic system 2 and the base, the base 1 is further provided with a clamping groove 14 for plugging and limiting a clamping block (not shown in the figure) of the electromagnetic system 2. Further, in order to facilitate the installation of the push card 4 and the base 1, the base 1 is provided with a sliding groove 15 on the front and rear sides of the first end of the push card 4 connected with the armature assembly 23 of the electromagnetic system 2, so that the push card 4 slides up and down along the sliding groove 15. The sliding groove arranged on the base 1 not only can play a role in positioning and limiting the push card 4 on the base 1, but also can play a role in guiding the movement of the push card 4, so that smooth switching between a self-holding state in which contacts are contacted and a reset state in which the contacts are separated is ensured.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. An electromagnetic relay, characterized in that: the device comprises a base, an electromagnetic system, a contact system and a pushing card, wherein a partition wall is arranged on the base along the height direction so as to divide the inner space of the base into an upper chamber for installing the electromagnetic system and a lower chamber for installing the contact system; the partition wall is in an inverted L shape, so that the upper chamber is in an L-shaped structure and comprises a transverse extending part and a longitudinal extending part which are mutually perpendicular, and the longitudinal extending part extends downwards to the lower surface of the base so as to be penetrated by pins of the electromagnetic system; the contact system is located on the other side of the lower chamber length from the longitudinal extension.

2. The electromagnetic relay according to claim 1, wherein: the contact system comprises a movable contact assembly and a fixed contact assembly, wherein the movable contact assembly comprises a movable reed transversely arranged and a movable contact arranged at one end of the movable reed; the static contact assembly comprises a static reed and a static contact arranged on the static reed, the static contact is correspondingly matched with the movable contact, and the positions of the static contact and the movable contact are located at the other side of the lower cavity, which is far away from the longitudinal extension part, in the length direction.

3. The electromagnetic relay according to claim 2, wherein: the movable contact assembly further comprises a movable reed leading-out sheet, one end of the movable reed leading-out sheet is fixedly connected with one end of the movable reed, which is far away from the movable contact, a movable reed pin is arranged at the other end of the movable reed leading-out sheet, and the movable reed leading-out sheet extends along the length direction of the lower cavity, so that the movable reed pin is far away from the pin of the electromagnetic system.

4. The electromagnetic relay according to claim 3, wherein: the static reed is provided with a static reed pin which is positioned on one side of the lower cavity, which is far away from the longitudinal extension part, in the length direction, and the static reed pin and the movable reed pin are respectively arranged on two sides of the lower cavity along the width direction.

5. The electromagnetic relay according to claim 3, wherein: the fixed connection end of the movable reed and the movable reed leading-out piece is close to the longitudinal extension part, and a limiting clamping groove for inserting the movable reed and the movable reed leading-out piece is arranged in the lower cavity and at the position where the movable reed and the movable reed leading-out piece are fixedly connected.

6. The electromagnetic relay according to claim 5, wherein: the lower cavity is provided with a limit seat for receiving the fixed connection ends of the movable reed leading-out sheet and the movable reed, and the limit clamping groove is a semi-closed groove surrounded by the upper wall of the lower cavity, the side surface of the longitudinal extension part and the upper surface of the limit seat.

7. The electromagnetic relay according to claim 6, wherein: the lower cavity is further provided with a hollowed-out groove capable of preventing injection shrinkage in the space below the limiting clamping groove, and the hollowed-out groove is formed along the width direction of the base.

8. The electromagnetic relay according to claim 7, wherein: the movable reed leading-out sheet comprises a connecting section fixedly connected with the movable reed, an extending section parallel to the connecting section and a slope positioned between the connecting section and the extending section, so that the movable reed leading-out sheet and the movable reed are approximately in a V-shaped structure after being fixedly connected; the shape of the limiting seat is corresponding to the connecting section and the slope of the movable reed leading-out sheet.

9. The electromagnetic relay according to claim 3, wherein: and an abutting plate is arranged in the lower cavity and abuts against the upper surface of the movable reed leading-out sheet so as to limit the movable reed leading-out sheet.

10. The electromagnetic relay according to claim 2, wherein: the first end of the pushing card is connected with the armature assembly of the electromagnetic system, the second end of the pushing card is connected with the movable reed of the contact system, and sliding grooves are respectively formed in the front side and the rear side of the base at the position of the first end of the pushing card so that the pushing card can slide up and down in the sliding grooves.