CN117894637A

CN117894637A - Electromagnetic relay

Info

Publication number: CN117894637A
Application number: CN202410056842.2A
Authority: CN
Inventors: 廖从峰; 黄盛金; 陈笔达
Original assignee: Xiamen Hongyuanda Electric Appliance Co ltd
Current assignee: Xiamen Hongyuanda Electric Appliance Co ltd
Priority date: 2024-01-15
Filing date: 2024-01-15
Publication date: 2024-04-16

Abstract

The invention discloses an electromagnetic relay, which comprises a frame, an armature and a coil component, wherein the coil component is arranged in the frame, the armature is arranged between the frame and the coil component in a swinging way, and comprises a connecting part which is connected and matched with a first part of the coil component and a swinging part which can be magnetically attracted and matched with a second part of the coil component, and the swinging part is provided with a first surface facing to the coil component and a second surface facing away from the coil component; the first surface of the swinging part is partially stamped to form a first convex part protruding out of the second surface, and the first convex part is in contact fit with a corresponding third part on the frame in the released state of the swinging part. The invention can control the size of the air gap between the release state of the swinging part of the armature and the second part of the coil component by controlling the stamping height of the first convex part, thereby ensuring the consistency of the air gap of the relay product and improving the stability of the attraction force of the product and the consistency of electrical parameters.

Description

Electromagnetic relay

Technical Field

The invention relates to the technical field of relays, in particular to an electromagnetic relay.

Background

An electromagnetic relay is an automatic switch that uses a smaller current, a lower voltage to control a larger current, a higher voltage. The switch function of the electromagnetic relay is that smaller current is introduced into the coil of the coil assembly, so that the coil assembly generates a magnetic field, the armature is attracted or released by the generation or disappearance of the magnetic field, and as the armature is attracted or released, the armature directly or through pushing the clamp to drive the movable spring part, so that the movable spring part and the static spring part are attracted or disconnected, and the on-off control of a high-current loop is realized. At present, the armature of the electromagnetic relay in the prior art is limited by adopting a frame of the relay in a release state, namely, the armature is in contact fit with a corresponding part of the frame in the release state, the size of an air gap between the armature in the release state and a part of a coil assembly for magnetically attracting and matching with the armature is not adjustable, and once the structure is produced and assembled in a deviation manner, the air gap is poor in consistency, so that the stability of the attraction force of a product and the consistency of electrical parameters cannot be ensured.

Disclosure of Invention

The invention provides an electromagnetic relay aiming at the technical problems existing in the prior art.

The technical scheme adopted for solving the technical problems is as follows: an electromagnetic relay includes a frame, an armature, a coil assembly mounted in the frame, the armature swingably disposed between the frame and the coil assembly, and the armature including a connection portion in connection with a first portion of the coil assembly and a swing portion capable of magnetically engaging a second portion of the coil assembly, the swing portion having a first face facing the coil assembly and a second face facing away from the coil assembly; the first surface of the swinging part is partially stamped to form a first convex part protruding out of the second surface, and the first convex part is in contact fit with a corresponding third part on the frame in the released state of the swinging part.

Further, the third portion is a second protruding portion provided on the frame.

Further, the second protruding portion is in a strip shape, and an extending direction of the second protruding portion is perpendicular to an axial direction of the coil assembly.

Further, the first protrusion is elongated and extends along the length direction of the swinging portion.

Further, the first protruding portion is located at one side, close to the connecting portion, of the middle portion of the swinging portion.

Further, the surface of the first protruding part is an outwards protruding cambered surface or a sphere, so that the first protruding part and the third part are in line-surface contact or point-surface contact in a contact state.

Further, the connecting portion is provided with a connecting groove, and the first portion is lapped in the connecting groove.

Further, the coil assembly comprises a coil frame, a yoke and a coil wound outside the coil frame, wherein the yoke is arranged in a through hole in the middle of the coil frame in a penetrating mode, one end of the yoke extends out of the coil frame and forms the first part, and the other end of the yoke is bent to the outer side of the coil frame and forms the second part.

Furthermore, the armature is L-shaped, and the connecting part and the swinging part of the armature respectively correspond to two sides of the L-shape.

Further, still include quiet spring part, move spring part and promote the card, quiet spring part and move spring part mutually support, and install respectively in the frame promotes the card and is located coil former is in axial one end outside, and promotes the one end and the cooperation of moving spring part connection of card, promote the other end of card with swing portion's tail end connection cooperation.

Compared with the prior art, the invention has the following beneficial effects:

1. Because the first surface of the swinging part is partially stamped to form the first convex part protruding to the outside of the second surface, and the first convex part is in contact fit with the corresponding third part on the frame in the release state of the swinging part, the invention can control the size of the air gap between the release state of the swinging part of the armature and the second part of the coil assembly by controlling the stamping height of the first convex part when stamping the first convex part, thereby ensuring the consistency of the air gap of a relay product and improving the stability of the suction force of the product and the consistency of electric parameters.

2. Because the corresponding third part on the frame is the second convex part arranged on the frame, the height of the first convex part on the armature can be punched smaller, thereby avoiding damage caused by too high punching of the first convex part.

The invention is described in further detail below with reference to the drawings and examples; an electromagnetic relay of the present invention is not limited to the embodiment.

Drawings

FIG. 1 is an exploded schematic view of the present invention;

Fig. 2 is a schematic perspective view of an armature of the present invention;

fig. 3 is a schematic perspective view of a second armature of the present invention;

Fig. 4 is a front view of an armature of the present invention;

FIG. 5 is a schematic perspective view of the frame of the present invention;

FIG. 6 is a schematic diagram of a perspective construction of the present invention (without the housing);

FIG. 7 is an enlarged schematic view of portion A of FIG. 6;

FIG. 8 is a schematic diagram of a perspective construction of the present invention (with a housing);

In the figure, 1, a frame, 11, a second convex portion, 2, a coil block, 21, a coil frame, 22, a coil, 23, a yoke, 3, an armature, 31, a swinging portion, 311, a first convex portion, 312, a groove 313, a third clamping groove, 32, a connecting portion, 321, a connecting groove, 4, a moving spring portion, 41, a moving spring piece, 411, a first clamping groove, 42, a moving contact, 43, a moving spring lead piece, 431, a second lead piece, 432, a second lead foot, 5, a static spring portion, 51, a static spring piece, 52, a static contact, 53, a static spring lead piece, 531, a first lead piece, 532, a first lead foot, 6, a push clip, 61, a bump, 62, a second clamping groove, 7, and a housing.

Detailed Description

In the present invention, the terms "first," "second," "third," and the like are used merely to distinguish between similar objects and not to describe a particular sequence or order, nor are they to be construed as indicating or implying relative importance.

In the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," and the like are to be construed broadly, and thus, for example, "connected" may be either fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or communicating between the interiors of two elements, and the specific meaning of the terms in the present invention will be understood to those skilled in the art in particular.

Referring to fig. 1-8, an electromagnetic relay of the present invention includes a frame 1, an armature 3, and a coil assembly 2, wherein the coil assembly 2 is mounted in the frame 1, the armature 3 is swingably disposed between the frame 1 and the coil assembly 2, and the armature 3 includes a connection portion 32 connected and matched with a first portion of the coil assembly 2 and a swinging portion 31 magnetically engaged with a second portion of the coil assembly 2, and specifically, the armature 3 has an L-shape, and the connection portion 32 and the swinging portion 31 correspond to two sides of the L-shape respectively. The pendulum 31 of the armature 3 has a first face facing the coil assembly 2 and a second face facing away from the coil assembly 2. The first surface of the swinging part 31 is partially formed with a first protruding part 311 protruding to the outside of the second surface by pressing, and the first protruding part 311 is in contact engagement with a corresponding third portion on the frame 1 in the released state of the swinging part 31. Thus, the present invention can control the size of the air gap between the released state and the second portion of the coil assembly 2 of the swinging portion 31 of the armature 3 by controlling the punching height of the first protruding portion 311.

As shown in fig. 2 to 4, the first protruding portion 311 is elongated and extends along the length direction of the swinging portion 31, and the first protruding portion 311 is located substantially at a side of the middle of the swinging portion 31 near the connecting portion 32. The portion of the first surface of the swinging portion 31 corresponding to the first protruding portion 311 is formed into a groove 312 by punching, and the shape and the peripheral dimension of the groove 312 are consistent or substantially consistent with those of the first protruding portion 311. As shown in fig. 2, the surface of the first protruding portion 311 is a convex arc surface or a spherical surface, so that the first protruding portion 311 and the third portion are in line-to-line contact or point-to-surface contact in a contact state, thereby reducing the contact friction force between the first protruding portion 311 and the third portion, and further reducing the abrasion of the first protruding portion 311 and/or the third portion.

Preferably, the third portion of the frame 1 is the second protrusion 11 provided on the frame 1, so that the height of the first protrusion 311 on the armature 3 can be prevented from being punched to be smaller, and damage caused by too high punching of the first protrusion 311 can be avoided. As shown in fig. 5, the second protruding portion 11 is located on a surface of the bottom of the frame 1 facing the swinging portion 31, and the second protruding portion 11 is elongated, and the extending direction of the second protruding portion 11 is perpendicular to the axial direction of the coil assembly 2.

In the present embodiment, the coil assembly 2 includes the bobbin 21, the yoke 23, and the coil 22 wound outside the bobbin 21, the bobbin 21 is in a lying type, and the axial direction thereof is located in the length direction of the frame 1. The yoke 23 is inserted into a through hole in the middle of the coil former 21, and one end of the yoke 23 extends out of the coil former 21 to form a first portion, and the other end of the yoke 23 is bent to the outside below the coil former 21 to form a second portion. The swinging part 31 of the armature 3 is located below the coil frame 21, the tail end of the connecting part 32 of the armature 3 is provided with a connecting groove 321, and a first part (namely one end of the yoke 23) is lapped in the connecting groove 321, so that swinging setting of the armature 3 is realized. The yoke 23 may also be referred to as an iron core.

In this embodiment, the present invention further includes a static spring portion 5, a moving spring portion 4, and a pushing card 6, where the static spring portion 5 and the moving spring portion 4 are mutually matched and are respectively mounted on the frame 1, the pushing card 6 is located outside one end of the coil former 21 in the axial direction, one end of the pushing card 6 is connected and matched with the moving spring portion 4, and the other end of the pushing card 6 is connected and matched with the tail end of the swinging portion 31. The static spring part 5 comprises a static spring piece 51 provided with a static contact 52 and a static spring leading-out piece 53, wherein the static spring piece 51 is electrically connected to the static spring leading-out piece 53, the static spring leading-out piece 53 is provided with a wide first leading-out piece 531 and a thin first leading-out foot 532, the first leading-out piece 531 extends upwards out of the top end of the frame 1, and the first leading-out foot 532 extends downwards out of the bottom end of the frame 1. Similarly, the movable spring part 4 includes a movable spring 41 provided with a movable contact 42 and a movable spring leading-out piece 43, the movable spring 41 is electrically connected to the movable spring leading-out piece 43, the movable spring leading-out piece 43 has a wide second leading-out piece 431 and a thin second leading-out foot 432, the second leading-out piece 431 extends upward beyond the top end of the frame 1, and the second leading-out foot 432 extends downward beyond the bottom end of the frame 1. The pushing card 6 is vertical, and two parallel protruding blocks 61 are arranged at the top of the pushing card 6, and the two protruding blocks 61 are respectively clamped into the first clamping slots 411 correspondingly arranged on the movable reed 41. Two second clamping grooves 62 are arranged at the bottom of the pushing card 6 in opposite directions, and the two second clamping grooves 62 are respectively meshed with two third clamping grooves 313 which are correspondingly arranged at the tail end of the swinging part 31 one by one.

The invention further comprises a housing 7, the upper end of the housing 7 is provided with an opening, and the housing 7 accommodates the coil assembly 2, the armature 3, the movable spring 41, the static spring 51 and the push card 6 in a housing cavity thereof. The first lead-out piece 531, the second lead-out piece 431, the first lead-out leg 532, and the second lead-out leg 432 extend out of the housing 7, respectively, as shown in fig. 8.

The electromagnetic relay of the present invention operates on the principle that when the coil 22 is energized, the coil assembly 2 generates a magnetic field, the swinging part 31 of the armature 3 is attracted by the other end of the yoke 23 to swing upwards until the swinging part is attracted to the other end of the yoke 23, and in the process, the swinging part 31 of the armature 3 pushes the push card 6 to move upwards, so that the movable reed 41 is driven to act until the movable contact point 42 on the movable reed 41 is closed with the fixed contact point 52 on the fixed reed 51. When the coil 22 is de-excited, the magnetic field generated by the coil assembly 2 disappears, and the swinging part 31 of the armature 3 is reset downwards by virtue of dead weight until the first convex part 311 of the swinging part contacts with the second convex part 11 on the frame 1 to form limit; in this process, the swinging portion 31 pulls the push card 6 downward, and the push card 6 pulls the movable reed 41 in the contact opening direction, so that the movable contact 42 is opened from the stationary contact 52.

According to the electromagnetic relay provided by the invention, the stamping height of the first protruding part 311 can be adjusted according to production requirements (namely, when the first protruding part 311 is stamped, the stamping height of the first protruding part 311 can be adjusted according to actual requirements), so that the size of an air gap between the release state of the swinging part 31 of the armature 3 and the second part of the coil assembly 2 can be adjusted, the consistency of the air gap of a relay product is further ensured, and the stability of the attraction force of the product and the consistency of electrical parameters are improved.

The electromagnetic relay of the invention is not related to the same part as the prior art or can be realized by the prior art.

The above embodiment is only used for further illustrating an electromagnetic relay of the present invention, but the present invention is not limited to the embodiment, and any simple modification, equivalent variation and modification made to the above embodiment according to the technical substance of the present invention falls within the protection scope of the technical solution of the present invention.

Claims

1. An electromagnetic relay includes a frame, an armature, a coil assembly mounted in the frame, the armature swingably disposed between the frame and the coil assembly, and the armature including a connection portion in connection with a first portion of the coil assembly and a swing portion capable of magnetically engaging a second portion of the coil assembly, the swing portion having a first face facing the coil assembly and a second face facing away from the coil assembly; the method is characterized in that: the first surface of the swinging part is partially stamped to form a first convex part protruding out of the second surface, and the first convex part is in contact fit with a corresponding third part on the frame in the released state of the swinging part.

2. The electromagnetic relay according to claim 1, wherein: the third part is a second convex part arranged on the frame.

3. The electromagnetic relay according to claim 2, wherein: the second protruding portion is long-strip-shaped, and the extending direction of the second protruding portion is perpendicular to the axial direction of the coil assembly.

4. The electromagnetic relay according to claim 1, wherein: the first protruding portion is long and extends along the length direction of the swinging portion.

5. The electromagnetic relay according to claim 1, wherein: the first convex part is positioned at one side of the middle part of the swinging part, which is close to the connecting part.

6. The electromagnetic relay according to claim 1, wherein: the surface of the first convex part is an outwards convex cambered surface or a sphere, so that the first convex part and the third part are in line-surface contact or point-surface contact in a contact state.

7. The electromagnetic relay according to claim 1, wherein: the connecting portion is provided with a connecting groove, and the first part is lapped in the connecting groove.

8. The electromagnetic relay according to claim 1 or 7, wherein: the coil assembly comprises a coil frame, a yoke and a coil wound outside the coil frame, the yoke is arranged in a through hole in the middle of the coil frame in a penetrating mode, one end of the yoke extends out of the coil frame and forms the first part, and the other end of the yoke is bent to the outer side of the coil frame and forms the second part.

9. The electromagnetic relay according to claim 1, wherein: the armature is L-shaped, and the connecting part and the swinging part of the armature respectively correspond to two sides of the L-shape.

10. The electromagnetic relay according to claim 1, wherein: still include quiet spring part, move spring part and promote the card, quiet spring part and move spring part mutually support, and install respectively in the frame promotes the card and is located the coil former is in axial one end outside, and promotes the one end and the cooperation of moving spring part connection of card, promote the other end of card with swing portion's tail end connection cooperation.