Sealed magnetic latching relay

Abstract

The utility model provides a sealed magnetic latching relay, which comprises an electromagnetic part and a contact part, the electromagnetic part comprises a coil group, a yoke magnetic steel group and an armature group, the contact part comprises at least one contact group arranged on the same side, and each contact group comprises a movable spring and a static contact group. The movable spring is connected with the armature group and corresponds to the static contact group, and the armature group swings back and forth to drive the movable spring to be in contact with or separated from the static contact group; and in the two yoke magnetic steel groups, the magnetic force of the magnetic steel of the yoke magnetic steel group on the same side as the static contact group is greater than that of the magnetic steel of the yoke magnetic steel group on the other side. Asymmetric contact spring counterforces of the relay form good cooperation, and stable operation of the relay is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of relay, concretely relates to a sealed magnetic latching relay. BACKGROUND

[0002] Now satellite manufacturing and launching technology has gradually matured, under the background of commercial satellite large-scale launching and application, the relay in the satellite power control system which plays the role of circuit detection and switching is put forward with higher requirements. On the one hand, the low-orbit satellite application environment puts forward the requirements of high impact and high frequency vibration to the relay; on the other hand, in order to improve the system integration, the relay in the power control component of electrical equipment is put forward with higher load volume ratio requirements.

[0003] The existing small balanced force type sealed magnetic latching relay can meet the requirements of high impact and vibration, but the contact form is mostly conversion type contact, and the contact system adopts the layout mode of two sides symmetry. The existing balanced force type magnetic latching relay is composed of a core, a yoke, two coils and two magnetic steels to form a double-stable double-coil symmetric magnetic circuit structure, and the characteristic is that the holding force of the armature is the same in the self-holding and reset states. When the contact part is only distributed on one side, an asymmetric structure is formed. Obviously, the existing double-stable double-coil symmetric magnetic circuit structure cannot be applied, and a magnetic latching relay suitable for single-sided contact part needs to be redesigned. SUMMARY

[0004] Therefore, the utility model provides a sealed magnetic latching relay to solve the above problems.

[0005] To achieve the above purpose, the utility model provides the technical scheme as follows:

[0006] A sealed magnetic latching relay, comprising an electromagnetic part and a contact part, the electromagnetic part comprises a coil group, a yoke magnetic steel group and an armature group, the yoke magnetic steel group is provided with two groups and is located at both ends of the coil group respectively, the armature group is arranged between the two yoke magnetic steel groups and is arranged in a hinged manner, the excitation of the coil group drives the armature group to switch and swing and is kept through the two yoke magnetic steel groups, the contact part comprises at least one contact group arranged on the same side, each contact group comprises a moving spring and a static contact group, the moving spring is connected to the armature group and corresponds to the static contact group, the back-and-forth swing of the armature group drives the moving spring to contact or separate the static contact group, and the magnetic force of the magnetic steel of the yoke magnetic steel group on the same side of the static contact group is greater than that of the magnetic steel of the yoke magnetic steel group on the other side.

[0007] Further, the two yoke magnetic steel groups are each composed of an outer yoke, an inner yoke and a magnetic steel arranged between the outer yoke and the inner yoke, and the inner yoke is arranged towards the coil group.

[0008] Further, the size of the magnetic steel of the yoke magnetic steel group on the same side of the static contact group is larger than the size of the magnetic steel of the yoke magnetic steel group on the other side.

[0009] Further, the coil group comprises a core and an operating / return coil, the core is arranged in the inner ring of the operating / return coil and is connected between the two yoke magnetic steel groups.

[0010] Further, the number of the contact groups is one group.

[0011] Further, in the same contact group, the moving spring has two spring leaves arranged in parallel and spaced apart, the first ends of the two spring leaves are connected, and the ends of the two spring leaves are both equipped with moving contacts, the static contact group comprises two static spring leaves arranged in parallel and static contacts equipped on the two static spring leaves, and the two moving contacts and the two static contacts correspond one by one.

[0012] Further, the armature group comprises an armature and a ceramic block, the ceramic block is fixed on the armature, the moving spring is fixedly equipped on the ceramic block, the ceramic block is equipped with a rotating shaft, and the ceramic block is arranged in a hinged manner through the rotating shaft.

[0013] Further, the moving spring is pressed on the ceramic block through a supporting sheet, and the supporting sheet, the moving spring and the ceramic block are fixedly connected through a rivet.

[0014] Further, a bottom plate is further included, the bottom plate is arranged with a main contact lead-out pin, and the static contact group is equipped on the main contact lead-out pin.

[0015] Further, the main contact lead-out pin is a copper core lead-out pin.

[0016] Further, a support is further included, the support is arranged with two opposite supports and is fixed on the bottom plate, and the electromagnetic part is fixed between the two supports.

[0017] Further, the two sides of the yoke magnetic steel group are respectively fixed on the two supports, the armature group is equipped on the two shaft supports through the rotating shaft, and the two shaft supports are respectively fixed on the two supports.

[0018] Further, an outer cover is further included, the outer cover covers the electromagnetic part and the contact part and is fixed on the bottom plate.

[0019] Further, an anti-vibration sleeve is arranged between the outer cover and the electromagnetic part.

[0020] Through the technical scheme provided by the utility model, the following beneficial effects are achieved:

[0021] In the magnetic circuit structure of this relay, the magnetic force of the magnets in the yoke magnet group on the same side as the stationary contact group is greater than that of the magnets in the yoke magnet group on the other side. This ensures a good match between the asymmetrical contact spring reaction forces, guaranteeing stable operation of the relay. Simultaneously, it reduces the need for adjustments to the magnetic properties of the magnets during assembly and debugging, lowers the difficulty of debugging, maintains consistency in magnetic properties, and features a balanced force structure that is resistant to impact and vibration. Attached Figure Description

[0022] Figure 1 The image shown is a schematic diagram of the appearance of the sealed magnetic latching relay in the embodiment;

[0023] Figure 2 The figure shown is a cross-sectional view of the sealed magnetic latching relay in the embodiment;

[0024] Figure 3 The diagram shown is a schematic representation of the electromagnetic component in the embodiment.

[0025] Figure 4 The diagram shown is a schematic representation of the assembly structure of the electromagnetic component and the moving spring in the embodiment.

[0026] Figure 5 The diagram shown is a schematic representation of the connection between the contact portion and the base plate in the embodiment.

[0027] Figure 6 The diagram shown is a schematic diagram of the connection between the stationary contact group and the base plate in the embodiment. Detailed Implementation

[0028] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] In the description of this invention, terms such as "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0031] Reference Figures 1 to 6As shown, the sealing magnetic latching relay provided by the embodiment comprises an electromagnetic part 10 and a contact part 20. The electromagnetic part 10 comprises a coil group 11, a yoke iron magnet group 12 and an armature group 13. The yoke iron magnet group 12 is provided with two groups and is located at two ends of the coil group 11 respectively. The armature group 13 is arranged between the two groups of yoke iron magnet groups 12 and is arranged in a hinged manner. Specifically, the two groups of yoke iron magnet groups 12 are each composed of an outer yoke iron 121, an inner yoke iron 123 and a magnet steel 122 arranged between the outer yoke iron 121 and the inner yoke iron 123. The inner yoke iron 123 is arranged towards the coil group 11. As shown in the figure, Figure 2 As shown, the two groups of yoke iron magnet groups 12 are arranged on the left and right sides. The coil group 11 comprises an iron core 112 and an action / return coil 111. Specifically, the action / return coil 111 comprises an action coil and a return coil. The iron core 112 is arranged in the inner circle of the action / return coil 111 and is connected between the two groups of yoke iron magnet groups 12, i.e. the two ends of the iron core 112 are arranged on the inner yoke iron 123 of the two groups of yoke iron magnet groups 12. In this way, the assembly of the coil group 11 and the two groups of yoke iron magnet groups 12 is achieved. The armature group 13 is located below the coil group 11. The armature group 13 comprises an armature 131 and a ceramic block 132. The ceramic block 132 is fixed on the armature 131. The ceramic block 132 is assembled with a rotating shaft 133 and is arranged in a hinged manner through the rotating shaft 133. The excitation of the coil group 11 drives the armature group 13 to switch and swing and is kept by the two groups of yoke iron magnet groups 12.

[0032] The contact part 20 comprises at least one group of contact groups arranged on the same side. In this embodiment, there is only one group of contact groups. The group of contact groups comprises a moving spring 21 and a static contact point group 25. Of course, in other embodiments, the number of contact groups can also be multiple. The multiple groups of contact groups can be arranged side by side or staggered.

[0033] The moving spring 21 is connected to the armature group 13 and corresponds to the static contact point group 25. Specifically, the moving spring 21 is fixedly assembled on the ceramic block 132. The back-and-forth swinging of the armature group 13 drives the moving spring 21 to contact or separate the static contact point group 25. In the two groups of yoke iron magnet groups 12, the magnetic force of the magnet steel 122 (defined as first magnet steel 1) on the same side of the static contact point group 25 is greater than that of the magnet steel 122 (defined as second magnet steel 2) on the other side. Figure 2As shown, the static contact group 25 is arranged towards the left side, and the magnetic force of the first magnetic steel 1 of the left yoke magnetic steel group 12 is greater than the magnetic force of the second magnetic steel 2 of the right yoke magnetic steel group 12; specifically, the magnetic force of the magnetic steel 122 has various influencing factors, mainly including material composition, magnetization process, temperature, size, and external magnetic field, etc.; in this embodiment, under the condition that other factors are the same, the magnetic force of the magnetic steel is determined by the size; that is, the size of the first magnetic steel 1 is greater than the size of the second magnetic steel 2; of course, in other embodiments, the magnetic force of the first magnetic steel 1 can also be greater than the magnetic force of the second magnetic steel 2 by using other factors.

[0034] In the magnetic circuit structure of the relay, the magnetic force of the magnetic steel 122 of the yoke magnetic steel group 12 arranged on the same side as the static contact group 25 is greater than the magnetic force of the magnetic steel 122 of the yoke magnetic steel group 12 arranged on the other side. This makes the asymmetric contact spring counterforce of the relay form a good match, ensuring stable operation of the relay. At the same time, during assembly and debugging, the adjustment of the magnetic properties of the magnetic steel 122 can be reduced, the debugging difficulty can be reduced, the magnetic properties can be kept consistent, and the balanced force type structure has the characteristics of impact resistance and vibration resistance.

[0035] Specifically, in this embodiment, the moving spring 21 has two spring blades 211 arranged in parallel and spaced apart, and the first ends of the two spring blades 211 are connected, so that the moving spring 21 forms a "U" shaped structure, and the ends of the spring blades 211 are respectively provided with a moving contact 22; specifically, the moving contact 22 is fixed on the end of the spring blade 211 by brazing; the static contact group 25 includes two static spring blades 23 arranged in parallel and a static contact 24 arranged on the two static spring blades 23; specifically, the static contact 24 is fixed on the static spring blade 23 by brazing, and the two moving contacts 22 and the two static contacts 24 correspond one by one to form a double-break contact structure. Of course, in other embodiments, the moving spring 21 can also be a "T" shaped structure, that is, the free end of the moving spring 21 extends into two branches, and the moving contact 22 is arranged on each branch; or other structures can be used to realize the double-break contact structure; or the double-break contact structure is not used.

[0036] More specifically, the ceramic block 132 is fixed on the armature 131 in the following manner: the two ends of the rotating shaft 133 are respectively fixed with a clamping shaft piece 134, and the clamping shaft piece 134 is welded and fixed on the armature 131, so as to fix the ceramic block 132 on the armature 131. Of course, in other embodiments, it is not limited thereto.

[0037] Specifically, the moving spring 21 is pressed on the ceramic block 132 through a support sheet 26, the support sheet 26, the moving spring 21 and the ceramic block 132 are fixed by riveting through a rivet 27, and stable assembly of the moving spring 21 is realized. Of course, in other embodiments, the structure of the armature group 13 and the structure of the moving spring 21 connected to the armature group 13 are not limited to this, for example, the moving spring 21 can be fixed on the ceramic block 132 through insertion, clamping or other ways, or the armature group 13 does not adopt the structure of the ceramic block 132, and the moving spring 21 is connected to the armature 131 through other insulation connection ways.

[0038] Specifically, the bottom plate 30 is further provided, the main contact lead-out pins 31 are provided on the bottom plate 30, the main contact lead-out pins 31 are sealed with the bottom plate 30, the number of the main contact lead-out pins 31 is two, the two main contact lead-out pins 31 are arranged side by side, and the two static contact groups 25 are assembled on the two main contact lead-out pins 31 respectively. Further, the static spring sheets 23 of the static contact groups 25 are fixed on the main contact lead-out pins 31 through welding. The main contact lead-out pins 31 are copper core lead-out pins, so as to bear larger current and make up for the insufficient current carrying capacity of the small relay.

[0039] The bracket 14 is further provided, the two brackets 14 are arranged side by side and fixed on the bottom plate 30, for example, through welding, the electromagnetic part 10 is fixed between the two brackets 14, so that the electromagnetic part 10 and the contact part 20 are arranged in an up-down distribution. Specifically, the two sides of the yoke magnetic steel group 12 are fixed on the two brackets 14 respectively, the armature group 13 is assembled on the two shaft brackets 15 through the rotating shaft 133, the two shaft brackets 15 are fixed on the yoke magnetic steel group 12 respectively, so that the hinged assembly of the armature group 13 is realized. Further, the rotating shaft 133 is matched with the shaft bracket 15 through the buffer washer (not shown in the figure), that is, the buffer washer is located between the shaft bracket 15 and the clamping shaft sheet 134, so as to avoid structural interference between the shaft bracket 15 and the clamping shaft sheet 134 and ensure flexible rotation of the armature group 13.

[0040] The outer cover 40 is further provided, the outer cover 40 covers the electromagnetic part 10 and the contact part 20 and is fixed on the bottom plate 30, so as to seal the electromagnetic part 10 and the contact part 20, and the anti-vibration sleeve 50 is arranged between the outer cover 40 and the electromagnetic part 10, so as to increase the anti-vibration performance of the mechanism.

[0041] The sealed magnetic latching relay provided in the embodiment forms a magnetic latching relay with a specification of one cubic inch. On the basis of the double-break structure of the contact, the size of the spring sheet is maximized according to the space structure of the relay. Not only can the arc burning time be effectively shortened and the material ablation of the contact be reduced during contact breaking, but also the service life of the relay is improved. In addition, the current carrying capacity and the environmental mechanical strength of the spring sheet are improved under the condition of the same volume requirement, so as to meet the requirements of customers for miniaturization and light weight.

[0042] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, it should be understood by those skilled in the art that various changes can be made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all of them are within the protection scope of the utility model.

Claims

1. A sealed magnetic latching relay comprising an electromagnetic part and a contact part, the electromagnetic part comprising a coil set, a yoke magnet set and an armature set, the yoke magnet set being provided in two sets and located at both ends of the coil set respectively, the armature set being provided between the two sets of yoke magnet set and being hinged, the excitation of the coil set drives the armature set to switch and swing and be kept by the two sets of yoke magnet set, characterized in that: The contact part comprises at least one contact group arranged on the same side, each contact group comprising a moving spring and a static contact group, the moving spring connecting the armature group and corresponding to the static contact group, the back-and-forth swing of the armature group driving the moving spring to contact or separate the static contact group; the magnetic force of the magnetic steel of the yoke magnetic steel group on the same side of the static contact group is greater than that of the magnetic steel of the yoke magnetic steel group on the other side.

2. The sealed magnetic latching relay of claim 1, wherein: Each of the two yoke magnetic steel groups comprises an outer yoke, an inner yoke and magnetic steel arranged between the outer yoke and the inner yoke; the inner yoke is arranged towards the coil group.

3. The sealed magnetic latching relay of claim 1 or 2, wherein: The size of the magnetic steel of the yoke magnetic steel group on the same side of the static contact group is greater than that of the magnetic steel of the yoke magnetic steel group on the other side.

4. The sealed magnetic latching relay of claim 1 or 2, wherein: The coil group comprises an iron core and an action / restoring coil, the iron core is arranged in the inner coil of the action / restoring coil and is connected between the two yoke magnetic steel groups.

5. The sealed magnetic latching relay of claim 1, wherein: The number of the contact groups is one group.

6. The sealed magnetic latching relay of claim 1 or 5, wherein: In the same contact group, the moving spring has two spaced-apart spring leaves arranged side by side, the first ends of the two spring leaves are connected, and the ends of the two spring leaves are both equipped with moving contacts; the static contact group comprises two static spring leaves arranged side by side and static contacts equipped on the two static spring leaves, and the two moving contacts and the two static contacts correspond one by one.

7. The sealed magnetic latching relay of claim 1, wherein: The armature group comprises an armature and a ceramic block, the ceramic block is fixed on the armature, the moving spring is pressed on the ceramic block through a support tab, the support tab, the moving spring and the ceramic block are fixed by riveting, the ceramic block is equipped with a rotating shaft, and the rotating shaft is arranged in a hinged manner.

8. The sealed magnetic latching relay of claim 1, wherein: A bottom plate is further included, the bottom plate is provided with a main contact lead-out pin, the static contact group is equipped on the main contact lead-out pin; the main contact lead-out pin is a copper core lead-out pin.

9. The sealed magnetic latching relay of claim 8, wherein: A support is further included, the support is arranged in two pairs and is fixed on the bottom plate; the electromagnetic part is fixed between the two supports.

10. The sealed magnetic latching relay of claim 8 or 9, wherein: An outer cover is further included, the outer cover covers the electromagnetic part and the contact part and is fixed on the bottom plate.

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