CN216213168U

CN216213168U - Magnetic latching relay

Info

Publication number: CN216213168U
Application number: CN202122352409.8U
Authority: CN
Inventors: 林江煌; 李学龙
Original assignee: Xiamen Hongfa Hermetically Sealed Relays Co ltd
Current assignee: Xiamen Hongfa Hermetically Sealed Relays Co ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-04-05
Anticipated expiration: 2031-09-27

Abstract

The utility model provides a magnetic latching relay, which comprises an electromagnetic system and a contact system, wherein the contact system comprises a movable contact part and a fixed contact part, wherein the middle part of the movable contact part is hinged on the electromagnetic system; the movable contact part comprises an insulating block and two groups of movable contact groups which are fixed on the insulating block and arranged in a back-to-back manner, and the two groups of movable contact groups respectively comprise a movable spring piece, a supporting sheet attached to the movable spring piece and a movable contact arranged on an elastic supporting arm of the movable spring piece; the contact working surfaces of the movable contacts of the two groups of movable contact groups are opposite in direction; the support sheet is arranged on the same side of the contact working surface of the movable contact, a bending part corresponding to the elastic support arm of the movable spring piece extends, and a concave part which is arranged at the bending part of the support sheet is arranged on the insulating block. The structure of two groups of dynamic contact points can be realized under the condition that the volume of the magnetic latching relay is not increased, so that the test requirement of a high-voltage load of a user is met.

Description

Magnetic latching relay

Technical Field

The utility model relates to the field of relays, in particular to a magnetic latching relay.

Background

The magnetic latching relay is an automatic switch, which comprises an electromagnetic system and a contact system, and makes use of the action of permanent magnetic steel to make a contact group of a product in a closed or open state. When the contact group of the relay needs to be opened or closed, the relay can complete the switching of the open or closed state only by applying a direct current pulse voltage with a certain width to the action coil or the reset coil of the magnetic latching relay, and after the state is switched, the coil does not need to be continuously powered, so that the aims of saving energy and reducing the temperature rise of the coil can be fulfilled.

In the fields of aviation and aerospace, the voltage of a direct-current power supply system is upgraded to 48Vd.c. in order to meet the requirements of miniaturization and light weight of equipment. The existing small-size (e.g., 1/5 cubic inches) magnetic latching relay after the dc voltage upgrade cannot meet the switching capability of 25A, 48vd.c. load.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a magnetic latching relay, which realizes the structure of two sets of dynamic contact points under the condition of not increasing the volume of the magnetic latching relay so as to meet the test requirement of a high-voltage load of a user.

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

a magnetic latching relay comprises an electromagnetic system and a contact system, wherein the contact system comprises a movable contact part and a fixed contact part, the middle part of the movable contact part is hinged on the electromagnetic system, and the fixed contact part corresponds to the movable contact part; the movable contact part comprises an insulating block and two groups of movable contact groups which are fixed on the insulating block and arranged in a back-to-back manner, and the two groups of movable contact groups respectively comprise a movable spring piece, a supporting sheet attached to the movable spring piece and a movable contact arranged on an elastic supporting arm of the movable spring piece; the contact working surfaces of the movable contacts of the two groups of movable contact groups are opposite in direction; the supporting sheet is arranged at the same side of the contact working surface of the movable contact, and a bending part corresponding to the elastic supporting arm of the movable spring piece extends.

Further, two groups of movable contact groups are defined as a first movable contact group and a second movable contact group respectively, the contact working surface of the movable contact of the first movable contact group faces the insulating block, and the contact working surface of the movable contact of the second movable contact group deviates from the insulating block; and a movable spring gasket is fixedly attached to the outer side of the movable spring of the first movable contact group.

Furthermore, the insulating block is provided with a concave part which is arranged at the bending part of the supporting sheet.

Furthermore, a convex rib for isolating the two groups of moving contact sets is arranged on the insulating block in a protruding mode.

Further, the insulating block is a ceramic block.

Furthermore, the two groups of moving contact sets are riveted and fixed on the insulating block through rivets.

Furthermore, the electromagnetic system comprises a fixed frame, a first yoke, a second yoke, a third yoke, permanent magnetic steel, a self-holding coil, a resetting coil, an iron core and an armature, wherein the first yoke, the second yoke and the third yoke are arranged at intervals and fixed on the fixed frame, the self-holding coil and the resetting coil are arranged between the first yoke and the second yoke, the iron core is arranged in the self-holding coil and the resetting coil in a penetrating manner, the permanent magnetic steel is arranged between the second yoke and the third yoke, and an insulating block of the movable contact part is connected with the armature and hinged to the fixed frame through a rotating shaft.

Furthermore, a positioning boss for positioning the permanent magnetic steel is laterally protruded from the third yoke.

Furthermore, a limiting boss used for limiting the permanent magnetic steel to be separated out protrudes laterally from the top of the third yoke.

Further, the cross-section of third yoke is "L" shape structure, has mutually perpendicular's diaphragm and riser, seted up the opening of stepping down on the diaphragm, the bottom of second yoke is provided with the boss, the boss passes the opening of stepping down and corresponds armature.

Furthermore, the static contact part comprises a base, a pin, a connecting sheet and a static contact, the pin is arranged on the base in a penetrating mode, the connecting sheet is fixed on the pin, and the static contact is arranged on the connecting sheet to correspond to the contact working face of the movable contact part.

Through the technical scheme provided by the utility model, the method has the following beneficial effects:

the contact working surfaces of the movable contacts of the two groups of movable contact groups are opposite in direction; the contact form of two sets of dynamic combinations is realized, the function of series connection voltage division is realized, and the test requirement of a high-voltage load of a user is met.

The supporting sheet is arranged at the same side of the contact working surface of the movable contact and extends to form a bending part corresponding to the elastic support arm of the movable spring leaf, so that the supporting sheet has the function of avoiding vibration bridging on one hand and has the function of stabilizing the movable spring leaf on the other hand.

The scheme can realize the structure of two groups of dynamic contact points under the condition of not increasing the volume of the magnetic latching relay so as to meet the test requirement of high-voltage load of a user.

Drawings

Fig. 1 is a perspective view of a magnetic latching relay in an embodiment;

fig. 2 is a sectional view showing a magnetic latching relay in the embodiment;

FIG. 3 is a schematic structural diagram of a movable contact part in the embodiment;

FIG. 4 is a schematic diagram of the mating structure of the moving contact portion and the armature of the embodiment;

FIG. 5 is a schematic view showing a part of the structure of the movable contact part and the stationary contact part which are engaged with each other in the embodiment;

FIG. 6 is a side view showing a part of the structure of the movable contact portion and the stationary contact portion which are mated in the embodiment;

FIG. 7 is a schematic structural view of a movable spring plate in the embodiment;

FIG. 8 is a schematic structural view of a blade in an embodiment;

fig. 9 is a schematic perspective view of a third yoke in the embodiment;

fig. 10 is a side view of a third yoke in the embodiment;

fig. 11 is a schematic perspective view of an electromagnetic system according to an embodiment.

Detailed Description

To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

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

Referring to fig. 1 and 2, the present embodiment provides a magnetic latching relay, specifically an 1/5 cubic inch magnetic latching relay; the electromagnetic contact system comprises an electromagnetic system 100 and a contact system 200, wherein the contact system 200 comprises a movable contact part 20 and a fixed contact part 30, the middle part of the movable contact part 20 is hinged on the electromagnetic system 100, and the fixed contact part corresponds to the movable contact part 20; the moving contact portion 20 is controlled to act by the electromagnetic system 100 to achieve the engagement with the stationary contact portion 30. Specifically, as shown in fig. 3 to 8, the moving contact part 20 includes an insulating block 21 and two sets of moving contact sets fixed on the insulating block 21 and arranged opposite to each other, and the insulating block 21 is made of a ceramic block, and has the characteristics of good insulation, stable structure, low cost and the like; of course, in other embodiments, the insulating block may be made of other insulating materials.

The two groups of movable contact sets comprise a movable spring piece 22, a supporting sheet 23 attached to the movable spring piece 22 and a movable contact 24 arranged on an elastic support arm 2201 of the movable spring piece 22; the contact working faces of the movable contacts 24 of the two sets of movable contact sets are oppositely facing. The contact form of two sets of dynamic combinations is realized, the function of series connection voltage division is realized, and the test requirement of a high-voltage load of a user is met.

Specifically, two groups of moving contact groups are defined as a first moving contact group 201 and a second moving contact group 202 respectively; the movable spring piece 22, the holder piece 23 and the movable contact 24 of the first movable contact group 201 are respectively a first movable spring piece 221, a first holder piece 231 and a first movable contact 241; the movable spring piece 22, the holder piece 23 and the movable contact 24 of the second movable contact group 202 are respectively a second movable spring piece 222, a second holder piece 232 and a second movable contact 242; the contact working face of the first movable contact 241 of the first movable contact group 201 faces the insulating block 21, and the contact working face of the second movable contact 242 of the second movable contact group 202 faces away from the insulating block 21.

The supporting plate 23 is on the same side of the contact working surface of the movable contact 24, that is, the first supporting plate 231 is located between the first movable contact piece 221 and the insulating block 21, and the second movable contact piece 222 is located between the second supporting plate 232 and the insulating block 21. And the supporting sheets 23 are extended with bending parts 2301 corresponding to the elastic support arms 2201 of the movable spring pieces 22. The support plate 23 serves on the one hand to prevent vibration bridging and on the other hand to stabilize the movable spring 22.

Further, the insulating block 21 is provided with a concave portion 211 which is provided with a bending portion 2301 of the supporting sheet (specifically, the first supporting sheet 231), so that the first supporting sheet 231 facing the insulating block 21 can be subjected to abdication, and not only can two sets of contact combination forms be realized, but also a contact gap can be ensured.

Specifically, as shown in fig. 3 and 4, the concave portions 211 are disposed on both sides of the insulating block 21, so that the first movable contact group 21 can be retracted on either side, and the assembly is convenient.

Specifically, the movable spring 22 is a U-shaped movable spring, and has two elastic support arms 2201, and the two elastic support arms 2201 are provided with the movable contact 24. I.e. there are two moving contacts 24 in each set of moving contacts. Meanwhile, the supporting sheet 23 is also a U-shaped supporting sheet, and has two supporting arms, both of which form a bending portion 2301 and respectively correspond to the two elastic supporting arms 2201 of the movable spring piece 22.

Further, in the first movable contact group 201, the first movable spring piece 221 is located at the outer side of the first supporting sheet 231, and the movable spring gasket 26 is further fixedly attached to the outer side of the first movable spring piece 221, so that the first movable spring piece 221 is more stable in fixation, and stability of contact pressure of a product is facilitated.

Specifically, the two movable contact sets are riveted and fixed on the insulating block through the rivet 25, and the assembly is simple and firm. Of course, other fixing methods such as bolt screwing and the like can be adopted for fixing in other embodiments.

Specifically, the insulation block 21 is provided with a convex rib 212 for isolating two sets of moving contact sets, so as to increase the creepage distance between the two sets of moving contact sets and improve the voltage withstanding capability of the product.

As shown in fig. 1 to 6, the fixed contact portion 30 includes a base 31, a pin 32, a connecting piece 33, and a fixed contact 34, the pin 32 is inserted into the base 31, the connecting piece 33 is fixed to the pin 32, and the fixed contact 34 is disposed on the connecting piece 33 to correspond to a contact working surface of the movable contact 24 of the movable contact portion 20. Specifically, there are eight pins 32, and the number of the connecting pieces 33 is four, and the connecting pieces are connected to four of the pins 32 and respectively correspond to four movable contacts 24.

With continued reference to fig. 1, 2 and 11, the electromagnetic system 100 includes a fixed frame 10, a first yoke 11, a second yoke 12, a third yoke 13, a permanent magnetic steel 14, a self-holding coil 15, a return coil 16, an iron core 17 and an armature 18, the first yoke 11, the second yoke 12 and the third yoke 13 are arranged at intervals and fixed on the fixed frame 10, the self-holding coil 15 and the return coil 16 are arranged between the first yoke 11 and the second yoke 12, the iron core 17 is arranged in the self-holding coil 15 and the return coil 16 in a penetrating manner, the permanent magnetic steel 14 is arranged between the second yoke 12 and the third yoke 13, and an insulating block 21 of the movable contact portion 20 is connected with the armature 18 and hinged to the fixed frame 10 through a rotating shaft 27; the movable contact part 20 is moved by the rotation shaft 27 to perform seesaw type movement.

The permanent magnet 14 provides a holding force for the self-holding state and the reset state. In the reset state, the armature 18 is attracted to the first yoke 11, and in the self-holding state, the armature 18 is attracted to the second yoke 12. The specific action principle is the prior art, and the detailed description is not provided herein.

Preferably, the first yoke 11 and the second yoke 12 are asymmetric in structure for matching the asymmetric contact system reaction force. Meanwhile, the winding windows of the self-holding coil 15 and the reset coil 16 in the electromagnetic system 100 are different in size, the coil resistance values are the same, and the ampere-turn values are different, so that the different electromagnetic attraction force is provided, and the different electromagnetic attraction force is used for matching with the asymmetric contact system counter force. The magnetic circuit is matched with the counter force of an asymmetric contact system through the structural asymmetry of the yoke parts and the asymmetry of the ampere turns of the coil, the structural space is fully utilized, and the miniaturization design of the magnetic latching relay is realized.

With reference to fig. 9 and 10, the cross section of the third yoke 13 is in an "L" shape, and has a horizontal plate 132 and a vertical plate 131 that are perpendicular to each other, and a positioning boss 1301 for positioning the permanent magnetic steel 14 protrudes laterally from the vertical plate 131 of the third yoke 13, so that the permanent magnetic steel 14 can be effectively positioned. And the top of the vertical plate 131 also laterally protrudes with a limit boss 1302 for limiting the permanent magnetic steel 14 to be separated, so that the permanent magnetic steel 14 is prevented from being separated upwards, and the stable assembly of the permanent magnetic steel 14 is ensured. Of course, in other embodiments, the assembly manner of the permanent magnetic steel 14 is not limited to this, for example, only the positioning boss 1301 or the limiting boss 1302 is adopted, or other structures are adopted for positioning or limiting, and the like.

The transverse plate 132 is provided with a abdication opening 1303, the bottom of the second yoke 12 is provided with a boss 121, and the boss 121 penetrates through the abdication opening 1303 to correspond to the armature 18 so as to generate an electromagnetic attraction relationship with the armature 18, so that the cooperation between the second yoke 12 and the armature 18 is not interfered.

The side of diaphragm 132 inwards caves in and has coil lead wire groove 1304, gives way the wire of coil for the structure is more compact.

The electromagnetic system 100 can ensure that the armature retaining force is more than 1.2N in the self-retaining state and the resetting state, and the vibration resistance, impact resistance and centrifugal acceleration resistance of the relay are improved.

Of course, in other embodiments, the structure of the electromagnetic system 100 is not limited thereto, and an existing magnetically-retained electromagnetic system structure may be used instead.

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 detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A magnetic latching relay comprises an electromagnetic system and a contact system, wherein the contact system comprises a movable contact part and a fixed contact part, the middle part of the movable contact part is hinged on the electromagnetic system, and the fixed contact part corresponds to the movable contact part; the movable contact part comprises an insulating block and two groups of movable contact groups which are fixed on the insulating block and are arranged back to back, and is characterized in that: the two groups of movable contact groups comprise movable reeds, supporting pieces attached to the movable reeds and movable contacts arranged on elastic support arms of the movable reeds; the contact working surfaces of the movable contacts of the two groups of movable contact groups are opposite in direction; the supporting sheet is arranged at the same side of the contact working surface of the movable contact, and a bending part corresponding to the elastic supporting arm of the movable spring piece extends.

2. The magnetic latching relay of claim 1, wherein: the insulating block is provided with a concave part which is arranged at the bending part of the supporting sheet.

3. The magnetic latching relay of claim 1, wherein: defining two groups of movable contact groups as a first movable contact group and a second movable contact group respectively, wherein the contact working surface of the movable contact of the first movable contact group faces the insulating block, and the contact working surface of the movable contact of the second movable contact group deviates from the insulating block; and a movable spring gasket is fixedly attached to the outer side of the movable spring of the first movable contact group.

4. The magnetic latching relay of claim 1, wherein: and the convex on the insulating block is provided with a convex rib for isolating two groups of moving contact groups.

5. The magnetic latching relay of claim 1, wherein: the insulating block is a ceramic block.

6. The magnetic latching relay of claim 1, wherein: the two groups of moving contact groups are riveted and fixed on the insulating block through rivets.

7. The magnetic latching relay of claim 1, wherein: the electromagnetic system comprises a fixing frame, a first yoke, a second yoke, a third yoke, permanent magnetic steel, a self-holding coil, a resetting coil, an iron core and an armature, wherein the first yoke, the second yoke and the third yoke are arranged at intervals and fixed on the fixing frame, the self-holding coil and the resetting coil are arranged between the first yoke and the second yoke, the iron core is arranged in the self-holding coil and the resetting coil in a penetrating mode, the permanent magnetic steel is arranged between the second yoke and the third yoke, and an insulating block of the movable contact part is connected with the armature and hinged to the fixing frame through a rotating shaft.

8. The magnetic latching relay of claim 7, wherein: the third yoke is laterally provided with a positioning boss for positioning the permanent magnetic steel in a protruding mode, and the top of the third yoke is laterally provided with a limiting boss for limiting the permanent magnetic steel to be separated out in a protruding mode.

9. The magnetic latching relay of claim 7, wherein: the cross-section of third yoke is "L" shape structure, has mutually perpendicular's diaphragm and riser, seted up the opening of stepping down on the diaphragm, the bottom of second yoke is provided with the boss, the boss passes the opening of stepping down and corresponds armature.

10. The magnetic latching relay of claim 1, wherein: the static contact part comprises a base, pins, a connecting piece and a static contact, the pins are arranged on the base in a penetrating mode, the connecting piece is fixed on the pins, and the static contact is arranged on the connecting piece to correspond to a contact working face of a movable contact of the movable contact part.