CN219873347U - Relay device - Google Patents

Abstract

The utility model discloses a relay, which comprises a base, a contact part, a push rod assembly and a magnetic circuit part, wherein the contact part is arranged on the base and comprises two groups of movable spring parts, each group of movable spring parts comprises a movable reed, a movable contact unit and a fixed contact unit, and the movable contact unit is arranged on the movable reed; the two movable contact units of the contact part correspond to the two stationary contact units respectively; the push rod component is connected with the two movable reeds; the magnetic circuit part is arranged on the base and used for driving the push rod assembly to move so as to drive the two movable reeds to be close to or far away from each other, so that the contact part is switched between a closed state and an open state; when the contact part is in a closed state, one movable reed deforms under the action of the push rod assembly to have elastic force, and the elastic force enables the movable reed to have a trend of moving towards a contact opening state.

Description

Relay device

Technical Field

The utility model relates to the technical field of electronic control devices, in particular to a relay.

Background

A relay is an electronic control device having a control system (also called an input loop) and a controlled system (also called an output loop), which is generally used in an automatic control circuit. A relay is in fact an "automatic switch" that uses a smaller current to control a larger current. Therefore, the circuit plays roles of automatic adjustment, safety protection, circuit switching and the like.

The relay comprises a magnetic circuit part, a push rod assembly and a contact part, wherein the magnetic circuit part comprises a coil assembly and an armature assembly, the coil assembly is used for driving the armature assembly to move, and the armature assembly drives the contact of the contact part to be closed or opened through the push rod assembly.

However, the magnetic driving force generated after the coil assembly in the prior art is electrified is not high in utilization ratio, and the differential processing can not be performed for different contact conditions.

Disclosure of Invention

The embodiment of the utility model provides a relay, which is used for solving the problem that the magnetic driving force utilization rate of a coil assembly is not high in the prior art.

The relay comprises a base, a contact part, a push rod assembly and a magnetic circuit part, wherein the contact part is arranged on the base and comprises two groups of movable spring parts, each group of movable spring parts comprises a movable reed, a movable contact unit and a fixed contact unit, and the movable contact unit is arranged on the movable reed; the two movable contact units of the contact part correspond to the two stationary contact units respectively; the push rod assembly is connected with the two movable reeds; the magnetic circuit part is arranged on the base and used for driving the push rod assembly to move so as to drive the two movable reeds to be close to or far away from each other, so that the contact part is switched between a closed state and an open state; when the contact part is in a closed state, one movable reed deforms under the action of the push rod assembly to have an elastic force, and the elastic force enables the movable reed to have a trend of moving towards a contact opening state.

According to some embodiments of the utility model, in the open state of the contact portion, a contact gap between one set of the corresponding movable contact unit and the stationary contact unit is smaller than a contact gap between the other set of the corresponding movable contact unit and the stationary contact unit; a group of the movable contact unit and the stationary contact unit with smaller contact gaps are defined as arc-resistant end contacts, and another group of the movable contact unit and the stationary contact unit with larger contact gaps are defined as current-carrying end contacts;

the movable contact spring of the movable contact unit corresponding to the current-carrying end contact is defined as a first movable contact spring, and the movable contact spring of the movable contact unit corresponding to the arc-resisting end contact is defined as a second movable contact spring;

the first movable reed deforms under the action of the push rod assembly to have the elastic force.

According to some embodiments of the utility model, the movable contact unit comprises one or more movable contacts, the stationary contact unit comprises one or more stationary contacts, the corresponding movable contacts and stationary contacts form a contact set, the arc-resistant end contact comprises one or more contact sets, and the current-carrying end contact comprises one or more contact sets;

the number of the contact sets of the arc-resistant end contact is smaller than or equal to that of the current-carrying end contact.

According to some embodiments of the utility model, the arc-resistant end contact comprises 1 or 2 of the contact sets;

the current carrying end contact comprises 2 or 3 sets of the contact sets.

According to some embodiments of the utility model, the arc-resistant end contact includes 2 sets of the contact groups, the 2 sets of the contact groups being arranged side by side along a width direction of the moving spring portion;

the current carrying terminal contact includes 2 or 3 sets of the contact groups, the 2 or 3 sets of the contact groups being arranged side by side along a width direction of the moving spring portion.

According to some embodiments of the utility model, a slit is formed in a portion of the movable contact between two adjacent movable contacts along a width direction of the movable contact.

According to some embodiments of the utility model, one end of the slit penetrates through the end face of the movable spring along the length direction of the movable spring, and the other end extends to the stationary contact on the movable spring.

According to some embodiments of the utility model, each set of the moving spring parts further comprises a moving spring lead-out piece connected with the moving spring piece;

the static contact unit is arranged at the joint of the movable reed and the movable reed leading-out sheet.

According to some embodiments of the utility model, the movable contact spring has opposite first and second ends in the length direction thereof;

the movable contact unit is arranged at the first end, and the second end is connected with the movable spring leading-out piece;

the push rod assembly is connected with the first ends of the two movable reeds respectively.

According to some embodiments of the utility model, the magnetic circuit portion includes a coil assembly and an armature assembly, the armature assembly being swingably connected to the base and the armature assembly being connected to the push rod assembly, the coil assembly being for driving the armature assembly to swing.

According to some embodiments of the utility model, the movable reed comprises a plurality of stacked sub-reeds.

According to some embodiments of the utility model, the push rod assembly comprises a first push rod and a second push rod, which are respectively connected with the two movable reeds.

One embodiment of the above utility model has at least the following advantages or benefits:

according to the relay provided by the embodiment of the utility model, one movable reed is deformed under the action of the push rod assembly to have elastic force, and the movable reed has a trend of moving towards a contact disconnection state by the elastic force, so that the breaking force required by the movable reed is smaller than that required by the other movable reed, and the breaking force provided by the push rod assembly for the other movable reed can be increased on the premise that the total breaking force provided by the push rod assembly is kept unchanged. Therefore, the relay provided by the embodiment of the utility model can perform differential treatment on the breaking force of the push rod assembly according to different contact conditions, so that unnecessary energy loss is reduced, and the utilization rate of the driving force of the whole coil is improved.

Drawings

Fig. 1 shows a schematic top view of a relay according to an embodiment of the utility model, wherein the upper cover is omitted.

Fig. 2 shows a schematic view of the omitted base of fig. 1, with the contact portion in an open state.

Fig. 3 shows a cross-sectional view of a magnetic circuit portion.

Fig. 4 shows a schematic view of one of the contact portions of fig. 1.

Fig. 5 is a schematic perspective view showing a contact portion of a first embodiment of the present utility model.

Fig. 6 is a schematic top view of one of the moving spring portions of the contact portion of the first embodiment of the present utility model.

Fig. 7 is an exploded view showing one of the movable spring parts of the contact part of the first embodiment of the present utility model, and the movable spring is not provided with a slit.

Fig. 8 is a schematic perspective view showing a contact portion of a second embodiment of the present utility model.

Fig. 9 is a schematic top view of one of the moving spring portions of the contact portion of the second embodiment of the present utility model.

Fig. 10 is an exploded view showing one of the movable spring parts of the contact part of the second embodiment of the present utility model, and the movable spring is provided with a slit.

Fig. 11 is a schematic top view showing one of the movable spring portions of the contact portion of the third embodiment of the present utility model.

Fig. 12 is a schematic top view showing one of the movable spring portions of the contact portion of the fourth embodiment of the present utility model.

Wherein reference numerals are as follows:

10. base seat

20. Contact portion

20a, moving spring portion

210. Movable reed

211. Sub reed

212. Carrier fluid

213. End face

214. Lancing

210a, first end

210b, second end

210c, a first movable contact spring

210d, a second movable reed

210e, third movable reed

210f, fourth movable reed

220. Movable contact unit

221. Movable contact

230. Stationary contact unit

231. Stationary contact

240. Movable spring leading-out piece

250. Arc-resistant end contact

260. Current-carrying end contact

30. Magnetic circuit part

310. Coil assembly

320. Armature assembly

321. Permanent magnet

322. Armature iron

323. Swing arm

40. Push rod assembly

410. First push rod

420. Second push rod

D1, lengthwise direction

D2, width direction

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

As shown in fig. 1 and 2, the relay of the embodiment of the present utility model includes a base 10, a pair of contact portions 20, a magnetic circuit portion 30, and a push rod assembly 40. A pair of contact portions 20 and a magnetic circuit portion 30 are provided on the base 10, and the magnetic circuit portion 30 drives contacts of the pair of contact portions 20 to be closed or opened by a push rod assembly 40.

It will be understood that the terms "comprising," "including," and "having," and any variations thereof, are intended to cover non-exclusive inclusions in the embodiments of the utility model. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.

In one embodiment, the base 10 may have a substantially square shape, but is not limited thereto.

A pair of contact portions 20 may be provided on two opposite sides of the magnetic circuit portion 30, respectively. Of course, the pair of contact portions 20 may be provided on the same side of the magnetic circuit portion 30.

Each contact portion 20 includes two sets of movable spring portions 20a, each set of movable spring portions 20a includes a movable spring 210, a movable contact unit 220, a stationary contact unit 230, and a movable spring lead-out piece 240, the movable spring 210 is connected to the movable spring lead-out piece 240, the movable contact unit 220 is disposed on the movable spring 210, and the stationary contact unit 230 is disposed on the movable spring 210 and/or the movable spring lead-out piece 240. The two movable contact units 220 of each contact portion 20 correspond to the two stationary contact units 230, respectively. The moving spring lead-out piece 240 is fixedly arranged on the base 10.

The magnetic circuit part 30 is provided on the base 10 for driving the four movable reeds 210 of the pair of contact parts 20 to move by the push rod assembly 40, thereby achieving the closing or opening of the movable contact unit 220 and the stationary contact unit 230.

It will be appreciated that the relay of the present embodiment includes a pair of contact portions 20, each contact portion 20 being capable of controlling one circuit, and then the relay of the present embodiment is capable of controlling at least two circuits.

Of course, in other embodiments, the relay may include only one contact portion 20, and the contact portion 20 is capable of controlling one circuit, and then the relay is capable of controlling one circuit.

In the open state of the contact portion 20, the contact gap between one set of the corresponding movable contact unit 220 and the stationary contact unit 230 is smaller than the contact gap between the other set of the corresponding movable contact unit 220 and the stationary contact unit 230.

As shown in fig. 2, in the contact portion 20 located above the magnetic path portion 30, the contact gap between the moving contact unit 220 and the stationary contact unit 230 on the left side is H1, and the contact gap between the moving contact unit 220 and the stationary contact unit 230 on the right side is H2, where H1 < H2.

Also, in the contact portion 20 located below the magnetic path portion 30, the contact gap between the movable contact unit 220 and the stationary contact unit 230 on the right side is H3, and the contact gap between the movable contact unit 220 and the stationary contact unit 230 on the left side is H4, where H3 < H4.

It should be added that the contact gap between the two sets of movable contact units 220 and the stationary contact unit 230 is designed differently, which can be achieved by lowering the contact height. Specifically, as shown in fig. 2, the contact portion 20 located above the magnetic circuit portion 30 is exemplified. The contact thicknesses of the right movable contact unit 220 and the stationary contact unit 230 are smaller than those of the left movable contact unit 220 and the stationary contact unit 230, and then when the contact portion 20 is in the opened state, since the contact thicknesses of the right are smaller than those of the left, the contact gap between the right movable contact unit 220 and the stationary contact unit 230 is larger and larger than that of the left.

Of course, other ways of designing the contact gap are also possible, and are not listed here, as long as it is possible to realize the contact gap between the two sets of movable contact units 220 and the stationary contact unit 230 different in the opened state of the contact portion 20, which is within the scope of the present utility model.

It will be appreciated that in the contact portion 20 of the embodiment of the present utility model, since the contact gaps between the two sets of movable contact units 220 and the stationary contact unit 230 are different in the open state, the set of movable contact units 220 and the stationary contact unit 230 having the larger contact gap may be disconnected in preference to the set of movable contact units 220 and the stationary contact unit 230 having the smaller contact gap in the process of switching the contact portion 20 from the closed state to the open state, and the set of movable contact units 220 and the stationary contact unit 230 having the smaller contact gap may not be completely disconnected at the time when the set of movable contact units 220 and the stationary contact unit 230 having the larger contact gap are just disconnected, and thus the set of movable contact units 220 and the stationary contact unit 230 having the larger contact gap may play a role of current carrying, and the set of movable contact units 220 and the stationary contact unit 230 having the smaller contact gap may play a role of arc resistance. Since the set of movable contact units 220 and stationary contact units 230 having a large contact gap does not generate an arc when they are opened, only the set of movable contact units 220 and stationary contact units 230 having a small contact gap need to be managed for the contact parameters of the entire contact portion 20, regardless of the set having a large contact gap. Compared with the multi-contact design in the prior art, the contact parameters of the contact portion 20 in the embodiment of the utility model are easier to control, and the processing is simple, thereby being beneficial to improving the production efficiency.

As an example, in each group of the movable spring portions 20a, the stationary contact unit 230 is provided at the junction of the movable spring 210 and the movable spring lead 240.

As shown in fig. 1 and 2, the movable contact spring 210 has a first end 210a and a second end 210b which are opposite to each other in the longitudinal direction D1 thereof, the movable contact unit 220 is provided at the first end 210a, and the stationary contact unit 230 is provided at the second end 210b. Further, since the second end 210b of the movable contact spring 210 is connected to the movable contact spring lead-out piece 240, the stationary contact unit 230 is provided at the connection portion between the second end 210b of the movable contact spring 210 and the movable contact spring lead-out piece 240.

In the contact portion 20, two movable contact springs 210 are disposed in parallel, and a movable contact unit 220 located on a first end 210a of one movable contact spring 210 corresponds to a stationary contact unit 230 located on a second end 210b of the other movable contact spring 210, so that two pairs of movable contact units 220 are in contact with the stationary contact unit 230 to form a parallel circuit structure. The contact portion 20 is designed as a parallel circuit structure, effectively reducing the temperature rise.

As shown in fig. 1 and 2, the push rod assembly 40 includes a first push rod 410 and a second push rod 420, the first push rod 410 and the second push rod 420 being disposed on the other two opposite sides of the magnetic circuit portion 30, respectively. The magnetic circuit portion 30 is drivingly connected to the first push rod 410 and the second push rod 420, respectively, so that the first push rod 410 and the second push rod 420 perform reciprocating push-pull movements.

One end of the first push rod 410 is connected to the first end 210a of one of the movable springs 210 of one of the contact portions 20, and the other end of the first push rod 410 is connected to the first end 210a of one of the movable springs 210 of the other contact portion 20. One end of the second push rod 420 is connected to the first end 210a of the other movable contact 210 of one of the contact portions 20, and the other end of the second push rod 420 is connected to the first end 210a of the other movable contact 210 of the other contact portion 20.

In the present embodiment, the push rod assembly 40 adopts a dual push rod structure of the first push rod 410 and the second push rod 420, and the contact is closed or opened by the push-pull action of the dual push rod structure.

Specifically, as shown in fig. 2, the movement directions of the first push rod 410 and the second push rod 420 are opposite, and if the first push rod 410 moves downward, the second push rod 420 moves upward. As the first push rod 410 moves downward, both the movable reeds 210 connected to the first push rod 410 swing downward around the respective second ends 210b. As the second push rod 420 moves upward, both the movable reeds 210 connected to the second push rod 420 swing upward around the respective second ends 210b. In one contact portion 20, the swing directions of the two movable reeds 210 are opposite and away from each other, and the disconnection of the movable contact unit 220 and the stationary contact unit 230 is achieved.

Conversely, if the first push rod 410 moves upward, the second push rod 420 moves downward. Both movable reeds 210 connected to the first push rod 410 swing upward around the respective second ends 210b, and both movable reeds 210 connected to the second push rod 420 swing downward around the respective second ends 210b. In one contact portion 20, the swing directions of the two movable reeds 210 are opposite and close to each other, and the closing of the movable contact unit 220 and the stationary contact unit 230 is achieved.

As shown in fig. 3, the magnetic circuit portion 30 includes a coil assembly 310 and an armature assembly 320, and the armature assembly 320 is swingably connected to the base 10. The coil assembly 310 is used to drive the armature assembly 320 to oscillate relative to the base 10. The armature assembly 320 includes a permanent magnet 321, an armature 322, and a swing arm 323. The number of the armatures 322 is two, and the permanent magnet 321 is sandwiched between the two armatures 322. The swing arm 323 may be made of an insulating material, such as plastic, and the permanent magnet 321, the armature 322, and the swing arm 323 may be connected as a single piece by integral injection molding. Both ends of the swing arm 323 are connected to the first push rod 410 and the second push rod 420, respectively.

By changing the magnetic field direction of the coil assembly 310 to drive the armature assembly 320 to swing relative to the base 10, the swing arm 323 of the armature assembly 320 drives the first push rod 410 and the second push rod 420 to reciprocate, respectively, so as to realize the opening or closing of the movable contact unit 220 and the stationary contact unit 230.

As shown in fig. 2 and 4, when the contact portion 20 is in the closed state, one of the movable springs 210 is deformed by the push rod assembly 40 to have an elastic force F, which causes the movable spring 210 to have a tendency to move toward the contact-open state.

For convenience of explanation, the two movable reeds 210 below the magnetic circuit portion 30 in fig. 2 are defined as a first movable reed 210c and a second movable reed 210d, respectively, and the two movable reeds 210 above the magnetic circuit portion 30 in fig. 2 are defined as a third movable reed 210e and a fourth movable reed 210f, respectively.

As shown in conjunction with fig. 2 and 4, one end of the first push rod 410 is connected to the first end 210a of the first movable reed 210c, and the other end of the first push rod 410 is connected to the first end 210a of the fourth movable reed 210f. One end of the second push rod 420 is connected to the first end 210a of the second movable contact spring 210d, and the other end of the second push rod 420 is connected to the first end 210a of the third movable contact spring 210 e. The first push rod 410 is used for driving the first movable reed 210c and the fourth movable reed 210f to swing around the respective second ends 210b, and the second push rod 420 is used for driving the second movable reed 210d and the third movable reed 210e to swing around the respective second ends 210b.

It will be appreciated that the coil assembly 310, when energized, is capable of driving the armature assembly 320 to oscillate relative to the base 10. For example, when the coil assembly 310 is energized with a forward current, the armature assembly 320 swings clockwise; when the coil assembly 320 is energized in the negative direction, the armature assembly 320 swings counterclockwise.

The coil driving force generated by energizing the coil assembly 310 needs to overcome the magnetic holding force generated by the permanent magnet 321 and the elastic force of the four movable reeds 210 connected to the first push rod 410 and the second push rod 420 respectively, and the armature assembly 320 can swing with respect to the base 10 only when the coil driving force is greater than the sum of the magnetic holding force and the elastic force.

In the embodiment of the present utility model, when the contact portion 20 is in the closed state, the first movable contact spring 210c is deformed by the first push rod 410 to have an elastic force F, and the elastic force F makes the first movable contact spring 210c have a tendency to move toward the contact open state. When the contact portion 20 is in the closed state, the third movable reed 210e is deformed by the second push rod 420 to have an elastic force F that causes the third movable reed 210e to have a tendency to move toward the contact-open state.

When the contact portion 20 is switched from the closed state to the open state, the first push rod 410 pushes the first movable reed 210c to swing downward, and the second push rod 420 pushes the third movable reed 210e to swing upward. At the same time, the first push rod 410 pulls the fourth movable reed 210f to swing downward, and the second push rod 420 pulls the second movable reed 210d to swing upward. Since the first movable reed 210c is deformed to have the elastic force F by the first push rod 410 and the third movable reed 210e is deformed to have the elastic force F by the second push rod 420, the breaking force required for the contact corresponding to H4+h2 should be smaller than the breaking force required for the contact corresponding to H1+h3, that is, the breaking force of the first push rod 410 and the second push rod 420 acting on the first movable reed 210c and the third movable reed 210e is different from the breaking force acting on the second movable reed 210d and the fourth movable reed 210F, as a whole. Therefore, the relay provided by the embodiment of the utility model can perform differential treatment on the breaking force of the two push rods according to different contact conditions, so that unnecessary energy loss is reduced, and the utilization rate of the driving force of the whole coil is improved.

One set of the movable contact unit 220 and the stationary contact unit 230 having a small contact gap is defined as an arc-resistant end contact 250, and the other set of the movable contact unit 220 and the stationary contact unit 230 having a large contact gap is defined as a current-carrying end contact 260.

The contact portion 20 located below the magnetic circuit portion 30, the movable contact unit movable contact spring 210 corresponding to the current-carrying terminal contact 260 is defined as a first movable contact spring 210c, and the movable contact unit movable contact spring 210 corresponding to the arc-resistant terminal contact 250 is defined as a second movable contact spring 210d.

The movable contact spring 210 of the movable contact unit corresponding to the current-carrying terminal contact 260 is defined as a third movable contact spring 210e, and the movable contact spring 210 of the movable contact unit corresponding to the arc-resistant terminal contact 250 is defined as a fourth movable contact spring 210f, which is located at a contact portion above the magnetic circuit portion 30.

Since the arc-resistant end contact 250 has a small contact gap, the contact is likely to have adhesion when the contact is opened, and the relay is not reliably broken. Therefore, the arc-resistant end contact 250 requires a larger breaking driving force than the current-carrying end contact 260 to achieve reliable breaking.

In the embodiment of the present utility model, the contacts corresponding to H4 and H2 are current-carrying end contacts 260, and the contacts corresponding to H1 and H3 are arc-resistant end contacts 250.

In this embodiment, when the contact portion 20 is in the closed state, the first movable reed 210c deforms under the action of the first push rod 410 to have an elastic force F, and the elastic force F makes the first movable reed 210c have a tendency to move toward the contact open state, so that when the contact portion 20 is switched from the closed state to the open state, the current-carrying terminal contact 260 corresponding to H4 is broken with only a small breaking force provided by the first push rod 410. Since the third movable contact spring 210e deforms under the action of the second push rod 420 and has the elastic force F when the contact portion 20 is in the closed state, the elastic force F causes the third movable contact spring 210e to have a tendency to move toward the contact open state, and when the contact portion 20 is switched from the closed state to the open state, the current carrying terminal contact 260 corresponding to H2 achieves breaking only by the smaller breaking force provided by the second push rod 420.

Therefore, on the premise that the driving force provided by the coil assembly 310 is unchanged, the breaking force required by the current-carrying end contact 260 corresponding to H4 and the current-carrying end contact 260 corresponding to H2 is smaller, so that the breaking driving force of the lower end of the second push rod 420 acting on the arc-resisting end contact 250 corresponding to H3 and the breaking driving force of the upper end of the first push rod 410 acting on the arc-resisting end contact 250 corresponding to H1 become larger, and thus the breaking force of the two arc-resisting end contacts 250 can be increased to achieve breaking, and the arc-resisting end contact 250 can achieve reliable breaking under the action of larger breaking force. In this way, the breaking force of the arc-resistant end contact 250 is increased while the breaking force of the current-carrying end contact 260 is reduced, and unnecessary energy loss is reduced. The relay provided by the embodiment of the utility model has the advantages of being convenient for controlling the parameters of the arc-resistant end contact 250, not considering the parameters of the current-carrying end contact 260, and improving the breaking reliability of the arc-resistant end contact 250.

Of course, it will be appreciated that in the case of one, three or other number of embodiments of the contact portion 20, there is also the advantage of increasing the arc-resistant end contact breaking force while reducing the current-carrying end contact breaking force as described above, which will not be described in detail herein.

As shown in fig. 2, the contact portion 20 located above the magnetic path portion 30, the moving contact unit 220 and the stationary contact unit 230 on the left side are defined as arc-resistant end contacts 250, and the moving contact unit 220 and the stationary contact unit 230 on the right side are defined as current-carrying end contacts 260. The contact portion 20 located below the magnetic path portion 30, the moving contact unit 220 and the stationary contact unit 230 on the right side are defined as arc-resistant end contacts 250, and the moving contact unit 220 and the stationary contact unit 230 on the left side are defined as current-carrying end contacts 260.

That is, in the embodiment of the present utility model, two arc-resistant end contacts 250 are located on one diagonal of the base 10, and two current-carrying end contacts 260 are located on the other diagonal of the base 10. The two ends of the first push rod 410 respectively correspond to a current-carrying end contact 260 and an arc-resisting end contact 250, and the two ends of the second push rod 420 respectively correspond to an arc-resisting end contact 250 and a current-carrying end contact 260.

Further, as shown in fig. 7, the movable reed 210 includes a plurality of stacked sub-reeds 211. By designing the movable reed 210 to include a plurality of stacked sub-reeds 211, on one hand, the sub-reeds 211 have a thinner thickness, the movable reed 210 can be made of a thin strip material, and the material cost is lower; on the other hand, by increasing or decreasing the number of sub-reeds 211, the thickness of movable reed 210 can be changed, facilitating the operation.

As shown in fig. 5 and 6, the movable contact unit 220 includes one or more movable contacts 221, the stationary contact unit 230 includes one or more stationary contacts 231, the corresponding movable contacts 221 and stationary contacts 231 form a contact set, the arc-resistant end contact 250 includes one or more contact sets, and the current-carrying end contact 260 includes one or more contact sets. The number of contact sets of arc-resistant end contact 250 is less than or equal to the number of contact sets of current carrying end contact 260.

In this embodiment, each of the arc-resistant end contact 250 and the current-carrying end contact 260 may be configured to include a plurality of contact sets, so that the parallel structure formed by the plurality of contact sets can further reduce the temperature rise of the relay. In addition, since the current-carrying end contact 260 plays a role in current carrying and the arc-resistant end contact 250 plays a role in arc resistance, the number of contact sets of the arc-resistant end contact 250 is designed to be smaller than or equal to that of the current-carrying end contact 260, so that the number of contact sets of the current-carrying end contact 260 is increased, the temperature rise is reduced, the number of contact sets of the arc-resistant end contact 250 is controlled, the control of contact parameters is facilitated, and finally, the control of the contact parameters is not influenced under the condition of increasing the contact sets.

As shown in fig. 5 and 6, in the embodiment of the present utility model, the contact portion 20 includes 3 contact sets, wherein the number of contact sets of the arc-resistant end contact 250 is 1, and the number of contact sets of the current-carrying end contact 260 is 2. The 2 sets of contact groups of the current-carrying terminal contacts 260 are arranged side by side along the width direction D2 of the movable reed 210.

With continued reference to fig. 6, along the width direction D2 of the movable contact 210, a slit 214 is formed in a portion of the movable contact 210 between two adjacent movable contacts 221. Further, along the length direction D1 of the movable reed 210, one end of the slit 214 penetrates the end face 213 of the movable reed 210, and the other end extends to the stationary contact 231 on the movable reed 210.

In the present embodiment, by providing the slit 214 on the movable contact spring 210, the movable contact spring 210 is divided into the plurality of carrier bodies 212 by the slit 214, and the plurality of movable contacts 221 on the movable contact spring 210 are provided on the plurality of carrier bodies 212 in one-to-one correspondence. In this way, the plurality of movable contacts 221 on the movable reed 210 can move relatively independently, so that the plurality of movable contacts 221 can reliably contact the stationary contact 231, and the occurrence of the situation that a part of movable contacts 221 on the movable reed 210 are already contacted with the stationary contact 231 and another part of movable contacts 221 are not yet contacted with the stationary contact 231 is avoided, thereby improving the contact reliability.

Of course, in other embodiments, the movable contact spring 210 may not have the slit 214.

The movable contact 221 and the stationary contact 231 are provided on the movable reed 210. It will be appreciated that movable contact 221 may be integrally or separately connected to movable contact 210, and stationary contact 231 may be integrally or separately connected to movable contact 210.

When the movable contact 221 and the stationary contact 231 are connected to the movable reed 210 in a split manner, the connection manner may be, but is not limited to, riveting.

Of course, in other embodiments, the movable spring 210 may be a single piece rather than a plurality of stacked sub-springs 211.

For the arc-resistant end contacts, as the number of the contact sets is small, the volume of each contact can be designed to be larger, and the silver layer arranged on the contact is more resistant to burning, so that the durability of the contact is improved. And moreover, the contact sets of the arc-resistant end contacts are fewer, so that the measurement of contact parameters is facilitated. For the current-carrying end contact, the number of the contact sets is large, and a multi-contact parallel structure is formed so as to reduce temperature rise.

As shown in fig. 8 to 10, the contact portion 20 of the second embodiment has substantially the same structure in the basic configuration as the contact portion 20 of the first embodiment. Therefore, in the following description of the contact portion 20 of the second embodiment, the structure already described in the first embodiment is not repeated. The same reference numerals are given to the same structures as those of the contact portion 20 described in the first embodiment. Therefore, in the following description of the present embodiment, differences from the contact portion 20 of the first embodiment will be mainly described.

In the embodiment of the present utility model, the contact portion 20 includes 4 contact sets, wherein the number of contact sets of the arc-resistant end contact 250 is 2, and the number of contact sets of the current-carrying end contact 260 is 2. The 2 sets of contacts of the arc-resistant end contact 250 and the 2 sets of contacts of the current-carrying end contact 260 are all arranged along the width direction D2 of the movable reed 210.

The movable contact spring 210 may be provided with a slit 214, or the slit 214 may not be provided.

As shown in fig. 11, the contact portion 20 of the third embodiment has substantially the same structure in the basic configuration as the contact portion 20 of the second embodiment. Therefore, in the following description of the contact portion 20 of the third embodiment, the structure already described in the second embodiment is not repeated. The same reference numerals are given to the same structures as those of the contact portion 20 described in the second embodiment. Therefore, in the following description of the present embodiment, differences from the contact portion 20 of the second embodiment will be mainly described.

In the embodiment of the present utility model, the contact portion 20 includes 4 contact sets, wherein the number of contact sets of the arc-resistant end contact 250 is 1, and the number of contact sets of the current-carrying end contact 260 is 3. In the current-carrying terminal contact 260, 3 sets of contact groups are arranged side by side along the width direction D2 of the movable reed 210.

The movable contact spring 210 may be provided with a slit 214, or the slit 214 may not be provided.

As shown in fig. 12, the contact portion 20 of the fourth embodiment has substantially the same structure in the basic configuration as the contact portion 20 of the first embodiment. Therefore, in the following description of the contact portion 20 of the fourth embodiment, the structure already described in the first embodiment is not repeated. The same reference numerals are given to the same structures as those of the contact portion 20 described in the first embodiment. Therefore, in the following description of the present embodiment, differences from the contact portion 20 of the first embodiment will be mainly described.

In the embodiment of the present utility model, the contact portion 20 includes 5 contact sets, wherein the number of contact sets of the arc-resistant end contact 250 is 2 and the number of contact sets of the current-carrying end contact 260 is 3.

Of the arc-resistant end contacts 250, 2 sets of contacts are arranged side by side along the width direction D2 of the movable reed 210. In the current-carrying terminal contact 260, 3 sets of contact groups are arranged side by side along the width direction D2 of the movable reed 210.

It will be appreciated that the various embodiments/implementations provided by the utility model may be combined with one another without conflict and are not illustrated here.

In the inventive embodiments, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the embodiments of the utility model will be understood by those skilled in the art according to the specific circumstances.

In the description of the embodiments of the utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the utility model and to simplify the description, and do not indicate or imply that the devices or units referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the utility model.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the utility model and is not intended to limit the embodiment of the utility model, and various modifications and variations can be made to the embodiment of the utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present utility model should be included in the protection scope of the embodiments of the present utility model.

Claims (12)

1. A relay, comprising:

a base;

the contact part is arranged on the base and comprises two groups of movable spring parts, each group of movable spring parts comprises a movable reed, a movable contact unit and a fixed contact unit, and the movable contact unit is arranged on the movable reed; the two movable contact units of the contact part correspond to the two stationary contact units respectively;

the push rod assembly is connected with the two movable reeds; and

the magnetic circuit part is arranged on the base and used for driving the push rod assembly to move so as to drive the two movable reeds to be close to or far away from each other, so that the contact part is switched between a closed state and an open state;

when the contact part is in a closed state, one movable reed deforms under the action of the push rod assembly to have an elastic force, and the elastic force enables the movable reed to have a trend of moving towards a contact opening state.

2. The relay according to claim 1, wherein in the contact portion in an open state, a contact gap between one set of the corresponding movable contact unit and the stationary contact unit is smaller than a contact gap between the other set of the corresponding movable contact unit and the stationary contact unit; a group of the movable contact unit and the stationary contact unit with smaller contact gaps are defined as arc-resistant end contacts, and another group of the movable contact unit and the stationary contact unit with larger contact gaps are defined as current-carrying end contacts;

the movable contact spring of the movable contact unit corresponding to the current-carrying end contact is defined as a first movable contact spring, and the movable contact spring of the movable contact unit corresponding to the arc-resisting end contact is defined as a second movable contact spring;

the first movable reed deforms under the action of the push rod assembly to have the elastic force.

3. The relay of claim 2, wherein the movable contact unit comprises one or more movable contacts, the stationary contact unit comprises one or more stationary contacts, the corresponding movable contacts and stationary contacts form a contact set, the arc-resistant end contact comprises one or more of the contact sets, and the current-carrying end contact comprises one or more of the contact sets;

the number of the contact sets of the arc-resistant end contact is smaller than or equal to that of the current-carrying end contact.

4. A relay according to claim 3, wherein the arc resistant end contacts comprise 1 or 2 of the contact sets;

the current carrying end contact comprises 2 or 3 sets of the contact sets.

5. A relay according to claim 3, wherein said arc-resistant end contact includes 2 sets of said contact groups, 2 sets of said contact groups being arranged side by side in a width direction of said moving spring portion;

the current carrying terminal contact includes 2 or 3 sets of the contact groups, the 2 or 3 sets of the contact groups being arranged side by side along a width direction of the moving spring portion.

6. A relay according to claim 3, wherein a slit is formed in a portion of the movable contact between two adjacent movable contacts in a width direction of the movable contact.

7. The relay according to claim 6, wherein one end of the slit penetrates through an end face of the movable reed in a length direction of the movable reed, and the other end extends to the stationary contact on the movable reed.

8. The relay of claim 1, wherein each set of said moving spring portions further comprises a moving spring lead-out tab, said moving spring lead-out tab being connected to said moving spring;

the static contact unit is arranged at the joint of the movable reed and the movable reed leading-out sheet.

9. The relay according to claim 8, wherein the movable reed has opposite first and second ends in a longitudinal direction thereof;

the movable contact unit is arranged at the first end, and the second end is connected with the movable spring leading-out piece;

the push rod assembly is connected with the first ends of the two movable reeds respectively.

10. The relay of claim 1, wherein the magnetic circuit portion includes a coil assembly and an armature assembly, the armature assembly being swingably connected to the base and the armature assembly being connected to the pushrod assembly, the coil assembly being for driving the armature assembly to swing.

11. The relay of claim 1, wherein the movable reed comprises a plurality of stacked sub-reeds.

12. The relay of claim 1, wherein the pushrod assembly comprises a first pushrod and a second pushrod, the first pushrod and the second pushrod being coupled to two movable reeds, respectively.