CN219873351U - Relay device - Google Patents

Abstract

The utility model discloses a relay, which comprises a contact part and an anti-short-circuit structure, wherein the contact part comprises a movable spring part and a pair of static spring parts; each static spring part comprises a static spring plate and a static contact arranged on the static spring plate; the movable spring part comprises a movable spring and a movable contact arranged on the movable spring; the short-circuit-resistant structure is used for generating suction force along the contact pressure direction when the movable reed circulates fault high current so as to resist electric repulsive force between the movable contact and the static contact; when a fault high current flows through the movable reed, the movable reed can deform under the action of suction force so as to drive the movable contact to move relative to the stationary contact.

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 direct-acting relay is one of relays, and a contact part of the direct-acting relay comprises two static spring parts and a movable spring part, wherein the movable spring part comprises movable spring pieces and movable contacts arranged at two ends of the movable spring pieces. When the movable contacts at the two ends of the movable reed are respectively contacted with the fixed contacts of the two fixed reed parts, the current flows in from one fixed reed part and flows out from the other fixed reed part after passing through the movable reed.

However, the direct-acting relay in the prior art is easy to cause adhesion or burning loss of the moving and static contacts when high current is conducted.

Disclosure of Invention

The embodiment of the utility model provides a relay, which is used for solving the problem that a movable contact and a static contact are easy to adhere in the prior art.

The relay of the embodiment of the utility model comprises:

a contact portion including a moving spring portion and a pair of stationary spring portions; each static spring part comprises a static spring plate and a static contact arranged on the static spring plate; the movable spring part comprises a movable spring and a movable contact arranged on the movable spring; and

a short-circuit-resistant structure for generating a suction force in a contact pressure direction when a fault large current flows through the movable contact spring, so as to resist an electric repulsive force between the movable contact and the stationary contact;

When the movable reed circulates a fault high current, the movable reed can deform under the action of the suction force so as to drive the movable contact to move relative to the stationary contact.

According to some embodiments of the utility model, the contact portion further comprises a current carrying member fixedly connected to the movable spring of the movable spring portion.

According to some embodiments of the utility model, the current carrying member is plate-shaped.

According to some embodiments of the utility model, the movable contact spring comprises a middle part and two contact parts, wherein the middle part is arranged between the two contact parts, and the movable contact is arranged on the two contact parts; a deformation part is arranged between at least one of the two contact parts and the middle part;

the deformation part is arranged to deform under the action of the suction force when the movable reed circulates fault heavy current, so as to drive the contact part to incline relative to the middle part in a direction away from the static spring part, and further drive the movable contact to move relative to the static contact.

According to some embodiments of the utility model, the contact portion comprises one of the moving spring portions; the contact part comprises at least two support arms, and the at least two support arms are connected with the middle part through the deformation part; each support arm is provided with one movable contact;

One of the stationary spring portions includes at least two stationary contacts, and at least two stationary contacts of one of the stationary spring portions correspond to at least two movable contacts of one of the contact portions, respectively.

According to some embodiments of the utility model, the short-circuit resistant structure comprises a first magnetizer and a second magnetizer, wherein the first magnetizer and the pair of static spring parts are arranged on one side of the moving spring part, and the second magnetizer is arranged on one side of the moving spring part, which is opposite to the first magnetizer, and is followed by the moving spring part;

and a magnetic conduction loop is formed between the first magnetic conductor and the second magnetic conductor.

According to some embodiments of the utility model, the contact portion includes at least two movable spring portions, the short-circuit resisting structure includes at least two second magnetizers, and the at least two movable spring portions are arranged side by side along a width direction of the respective movable spring pieces; the at least two second magnetizers are arranged on one side of the at least two movable spring parts, which is opposite to the first magnetizer, in a one-to-one correspondence manner;

one stationary spring part comprises at least two stationary contacts, and at least two stationary contacts of one stationary spring part respectively correspond to at least two movable contacts of one end of at least two movable spring parts in the length direction.

According to some embodiments of the utility model, each of the second magnetic conductors comprises a base and two side portions, the two side portions being connected to opposite sides of the base, respectively; the base part is fixedly connected to one side of the movable reed, which is opposite to the first magnetizer, and the two side parts are respectively arranged on two opposite side edges of the movable reed in the width direction; each side part is provided with a magnetic pole face towards one side of the first magnetizer;

a through hole is formed between two adjacent movable reeds;

two adjacent side parts of the two adjacent second magnetizers penetrate through the through holes.

According to some embodiments of the utility model, the contact portion further comprises at least two current carrying members, and the at least two current carrying members are fixedly connected to one side of the at least two movable reeds facing the first magnetizer in a one-to-one correspondence.

According to some embodiments of the utility model, the deformation portion is provided between each of the contact portions and the intermediate portion.

According to some embodiments of the utility model, the intermediate portion, the contact portion and the deformation portion are of unitary construction.

According to some embodiments of the utility model, the relay further comprises:

A base;

a push rod mechanism movable relative to the base between a first position and a second position in a contact-separation direction of the movable contact and the stationary contact; when the push rod mechanism is positioned at the first position, the movable contact and the stationary contact are closed; when the push rod mechanism is positioned at the second position, the movable contact is disconnected from the stationary contact; and

an elastic member mounted to at least one of the moving spring portions; the movable spring portion is provided on the push rod mechanism by the elastic member for providing a contact pressure when the push rod mechanism is in the first position.

According to some embodiments of the utility model, the short circuit resistant structure includes a first magnetizer provided on a side of the moving spring portion facing the static spring portion;

the first magnetizer and the static reed are fixedly arranged on the base.

According to some embodiments of the utility model, the short circuit resistant structure includes a first magnetizer disposed on a side of the moving spring portion facing the static spring portion.

According to some embodiments of the utility model, the first magnetizer is disposed between a pair of the static spring portions.

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, when the movable reed flows a fault high current, the movable reed can deform under the action of the suction force generated by the short-circuit-resistant structure so as to drive the movable contact to move relative to the stationary contact. The movable contact moves relative to the stationary contact, the adhesion area possibly generated between the movable contact and the stationary contact can be pulled open, the problem of adhesion or burning loss between the movable contact and the stationary contact is avoided, the reliability of products is improved, and the service life of the relay is prolonged.

In addition, when the fault heavy current disappears, the movable reed is not subjected to the action of suction force any more to reset. In the process of resetting the movable reed, the movable reed can drive the movable contact to move relative to the fixed contact, so that secondary adhesion between the movable contact and the fixed contact is avoided.

Drawings

Fig. 1 is a perspective view of a relay according to a first embodiment of the present utility model, in which an upper cover is omitted and a contact portion is in a completely closed state.

Fig. 2 shows a perspective view of the base omitted from fig. 1.

Fig. 3 shows a schematic side view of the relay of the first embodiment of the present utility model, in which the upper cover is omitted and the contact portion is in a fully closed state.

Figure 4 shows a cross-sectional view of A-A in figure 3.

Fig. 5 shows a schematic perspective view of the magnetic circuit portion omitted in fig. 2.

Fig. 6 shows an exploded view of fig. 5 with the push rod mechanism omitted and only one set of contact portions shown.

Fig. 7 is a schematic view showing the contact of the contact portion after closing, in which the deformation portion is not deformed.

Fig. 8 is a schematic view showing the contact of the contact portion after closing, in which the deformation portion is deformed.

Fig. 9 is a perspective view of the elastic member of fig. 6.

Fig. 10 shows a schematic top view of the contact portion, the elastic member, disposed on the base, wherein the contact portion is in a fully closed state.

Fig. 11 shows a schematic top view of the contact portion, the elastic member, disposed on the base, wherein the contact portion is in a fully open state.

Fig. 12 is an exploded view showing an elastic member, a short-circuit resistant structure, and a contact portion in a relay according to a second embodiment of the present utility model.

Fig. 13 is an exploded view showing an elastic member, a short-circuit resistant structure, and a contact portion in a relay according to a third embodiment of the present utility model.

Fig. 14 is an exploded view showing an elastic member, a short-circuit resistant structure, and a contact portion in a relay according to a fourth embodiment of the present utility model.

Fig. 15 is a schematic view showing an elastic member in a relay according to a fifth embodiment of the present utility model.

Wherein reference numerals are as follows:

10. a base; 110. A stop portion;

30. a push rod mechanism; 310. A push rod; 320. An iron core;

50. a contact portion; 501. a moving spring part; 502. a stationary spring portion; 510. a static reed; 520a, stationary contact; 530. a movable reed; 531. an intermediate portion; 532. a contact portion; 532a, arms; 532b, first connection holes; 533. a deformation section; 534. a through hole; 540a, movable contact; 550. a current carrying member;

70. a magnetic circuit portion; 710. a yoke structure; 711. a yoke plate; 7111. a through hole; 712. a U-shaped yoke; 720. a wire frame; 721. a central bore; 730. a coil; 740. a permanent magnet;

80. an anti-short circuit structure; 810. a first magnetizer; 820. a second magnetizer; 821. a base; 822. a side portion;

90. an elastic member; 910. a connection part; 911. a second connection hole; 912. a connecting arm; 920. a first elastic portion; 921. a spring frame; 921a, openings; 922. a first elastic arm; 930. a second elastic part; 931. a second elastic arm; 940. a spring plate; 941. a connection end; 942. a free end; 943. a third elastic arm; 950. a reed; 960. a connection section;

D1, in the length direction; d2, width direction; s, avoiding space

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 to 5, the relay of the embodiment of the present utility model includes a housing, a push rod mechanism 30, a magnetic circuit portion 70, a contact portion 50, and an elastic member 90. The magnetic circuit portion 70 is energized to drive the push rod mechanism 30 to move to control the closing or opening of the contact portion 50.

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.

The housing may be made of a plastic material, but is not limited thereto. The housing has a cavity for accommodating the push rod mechanism 30, the magnetic circuit portion 70, the contact portion 50 and the elastic member 90.

The housing includes a base 10 and an upper cover (not shown in the drawings), the base 10 and the upper cover being snapped together and forming a chamber for accommodating the push rod mechanism 30, the magnetic circuit portion 70, the contact portion 50 and the elastic member 90. The shape in which the base 10 and the upper cover are snapped together may be determined according to the assembled shape of the push rod mechanism 30, the magnetic circuit portion 70, the contact portion 50 and the elastic member 90. For example, in the embodiment of the present utility model, the base 10 and the upper cover are buckled to form a hollow cuboid, but not limited thereto.

In one embodiment, the upper cover has a rectangular parallelepiped shape with an opening, the base 10 has a substantially plate shape, and the base 10 is engaged with the opening of the upper cover to form the chamber.

Of course, in other embodiments, the upper cover may be plate-shaped, and the base 10 may be rectangular parallelepiped with an opening. Or, the base 10 and the upper cover are both cuboid and have openings on one surface, the openings of the base 10 and the openings of the upper cover are opposite, and the base 10 and the upper cover are buckled to form the cavity.

In addition, the chamber of the housing may be used only for accommodating the parts of the relay itself such as the push rod mechanism 30, the magnetic circuit portion 70, the contact portion 50, and the elastic member 90. Of course, in other embodiments, the housing is also to be understood in a broad sense as being used not only to house components of the relay, but also to house components of other components. In other words, the relay shares one housing with other components.

The magnetic circuit portion 70 includes a yoke structure 710, a bobbin 720, and a coil 730. The yoke structure 710 forms a cavity, and the bobbin 720 and the coil 730 are disposed within the cavity of the yoke structure 710. The coil 730 is wound around the outer circumference of the bobbin 720 to form a magnetic control loop. The wire holder 720 is provided with a center hole 721 in the contact-contact separation direction of the contact portion 50, the center hole 7211 being for the push rod mechanism 30 to pass therethrough.

As an example, the yoke structure 710 includes a yoke plate 711 and a U-shaped yoke 712, and the yoke plate 711 is connected to the U-shaped yoke 712 to form a ring yoke. The yoke plate 711 is provided with a through hole 7111, and the through hole 7111 is provided for the push rod mechanism 30 to pass through.

Of course, in other embodiments, the yoke structure 710 may also include a cylindrical yoke and a yoke plate that are joined to form a ring yoke.

The magnetic circuit portion 70 further includes two permanent magnets 740, and the two permanent magnets 740 are disposed on the bobbin 720 and located at both sides of the movement direction of the push rod mechanism 30. The yoke structure 710 is arranged outside the wire frame 720 and the permanent magnet 740 to form a magnetic circuit structure of magnetic retention.

Of course, in other embodiments, the permanent magnet 740 may be omitted, and no magnetic circuit structure with magnetic latching is formed, so that the cost of electricity is high, the service life is short, and the stability of comprehensive performance is poor.

As shown in fig. 4 and 5, the push rod mechanism 30 is movable relative to the base 10 of the housing between a first position and a second position in the contact-to-separation direction of the contacts of the contact portion 50. When the push rod mechanism 30 is in the first position, the contacts of the contact portion 50 are in a fully closed state. When the push rod mechanism 30 is in the second position, the contacts of the contact portion 50 are in a fully open state.

The push rod mechanism 30 includes a push rod 310 and a core 320, the core 320 being connected to the push rod 310. The iron core 320 can move in the contact or separation direction of the contacts under the action of the magnetic control circuit formed by the coil 730, and thus drives the push rod 310 to move, so as to control the contact or separation of the contact portion 50. A permanent magnet 740 is provided on the side of the iron core 320 facing away from the push rod 310.

In the embodiment of the present utility model, the push rod mechanism 30 includes two iron cores 320, the two iron cores 320 are respectively disposed on two sides of the push rod 310, and a permanent magnet 740 is disposed on a side of each iron core 320 facing away from the push rod 310.

As shown in fig. 5 and 6, the contact portion 50 includes at least one moving spring portion 501 and a pair of static spring portions 502. The stationary spring portion 502 is fixedly mounted on the base 10, the movable spring portion 501 is mounted on the push rod mechanism 30 through the elastic member 90, and the movable spring portion 501 follows the push rod mechanism 30.

It should be noted that the number of the contact portions 50 in the embodiment of the present utility model is not particularly limited, and for example, the contact portions 50 may be one, two, three or more. In the embodiment of the present utility model, the number of the contact portions 50 is two, and the two contact portions 50 are disposed at intervals in the moving direction of the push rod mechanism 30.

Each static spring portion 502 includes a static spring plate 510 and at least one static contact 520a connected to the static spring plate 510. The static reed 510 is fixedly mounted on the base 10, for example, the static reed 510 is inserted into the base 10, and part of the static reed 510 extends out of the bottom surface of the base 10, and part of the static reed 510 is located in the base 10.

The stationary contact 520a and the stationary reed 510 may be connected by riveting, welding, or the like. The stationary contact 520a and the stationary reed 510 may be integrally formed or may be separately formed.

The number of stationary contacts 520a may be one, two, three, etc. When the number of the stationary contacts 520a is equal to or greater than two, the plurality of stationary contacts 520a do not contact each other.

The movable spring part 501 includes a movable spring 530 and a movable contact 540a, and at least one movable contact 540a is provided at both ends of the movable spring 530 in the length direction D1. At least one movable contact 540a at one end of the at least one movable spring portion 501 in the length direction D1 corresponds to at least one stationary contact 520a of one stationary spring portion 502.

The movable contact 540a and movable spring 530 may be connected by riveting, welding, or the like. Further, movable contact 540a and movable spring 530 may be integrally formed or may be separately formed.

The number of the movable contacts 540a may be one, two, three, or the like. When the number of the movable contacts 540a is two or more, the plurality of movable contacts 540a do not contact each other.

In the embodiment of the present utility model, the contact portion 50 includes a movable spring portion 501, and two movable contacts 540a are disposed at two ends of the movable spring portion 501 in the length direction D1 of the movable spring 530, but not limited thereto.

As shown in fig. 5 and 6, the relay according to the embodiment of the present utility model further includes a short-circuit resisting structure 80, and the short-circuit resisting structure 80 is used for resisting an electric repulsive force generated by a short-circuit current flowing between the movable contact 540a and the stationary contact 520 a.

It will be appreciated that the number of anti-shorting structures 80 corresponds to the number of contact portions 50. For example, the relay of the embodiment of the present utility model includes two short-circuit resistant structures 80, and the two short-circuit resistant structures 80 correspond to the two contact portions 50, respectively.

The anti-shorting structure 80 includes a first magnetic conductor 810 and a second magnetic conductor 820. The first magnetizer 810 and the second magnetizer 820 can be made of iron, cobalt, nickel, alloys thereof, and the like.

The first magnetizer 810 is fixedly mounted on the base 10, for example, the first magnetizer 810 is inserted into the base 10. First magnetizer 810 and static spring portion 502 are provided on one side of movable spring 530.

In one embodiment, the first magnetizer 810 is disposed between the pair of static spring portions 502. In this manner, the space between the pair of static spring portions 502 is utilized to accommodate the first magnetizer 810, and the arrangement of the first magnetizer 810 does not occupy the space of the relay in the moving direction of the push rod mechanism 30.

The second magnetizer 820 is fixedly connected to the movable spring 530, and the connection mode can be riveting, but is not limited thereto. At least a portion of second magnetic conductor 820 is disposed on a side of movable reed 530 facing away from first magnetic conductor 810. First magnetizer 810 and second magnetizer 820 are respectively positioned at two sides of movable spring 530, and when movable spring 530 is used for flowing current, a magnetic conduction loop is formed between first magnetizer 810 and second magnetizer 820.

It is understood that the first magnetizer 810 and the second magnetizer 820 may have L-shape, U-shape, or straight shape, as long as a magnetic conductive loop can be formed between the first magnetizer 810 and the second magnetizer 820.

When a large current passes through movable reed 530, a suction force is generated between first magnetizer 810 and second magnetizer 820 along the contact pressure direction, and the suction force can resist an electric repulsive force generated between movable contact 540a and stationary contact 520a due to a short-circuit current, so that movable contact 540a and stationary contact 520a are ensured not to spring open.

As shown in fig. 5, the number of elastic members 90 corresponds to the number of contact portions 50. In the embodiment of the present utility model, the relay includes two elastic members 90, one of the movable spring portions 501 is mounted on the push rod mechanism 30 through one elastic member 90, and the other movable spring portion 501 is mounted on the push rod mechanism 30 through the other elastic member 90. The resilient member 90 is used to provide a contact pressure when the push rod mechanism 30 is in the first position.

As shown in fig. 6 to 8, the movable contact spring 530 includes a middle portion 531 and two contact portions 532, the middle portion 531 is provided between the two contact portions 532, and at least one movable contact 540a is provided on each of the two contact portions 532. The two contact portions 532 correspond to the pair of the stationary spring portions 502, respectively, such that the movable contact 540a provided on the contact portion 532 corresponds to the stationary contact 520a of the stationary spring portion 502. In the embodiment of the utility model, two movable contacts 540a are disposed on each contact portion 532, but not limited thereto.

A deformation portion 533 is provided between at least one of the two contact portions 532 and the intermediate portion 531. In the embodiment of the present utility model, a deformation portion 533 is disposed between each contact portion 532 and the intermediate portion 531. That is, movable spring 530 includes intermediate portion 531, two contact portions 532, and two deformed portions 533, and contact portions 532 are connected to intermediate portion 531 via deformed portions 533.

At least a portion of the second magnetic conductor 820 is fixedly coupled to a side of the intermediate portion 531 facing away from the first magnetic conductor 810. When a large fault current (e.g., a short-circuit current) flows through movable reed 530, a magnetic attraction force is generated between first magnetic conductor 810 and second magnetic conductor 820. When the second magnetizer 820 is attracted by the first magnetizer 810 and drives the middle portion 531 to move in a direction approaching the first magnetizer 810, the deformation portion 533 deforms, so that the contact portion 532 is inclined relative to the middle portion 531 in a direction separating from the static spring portion 502, and the movable contact 540a is driven to move relative to the static contact 520 a.

It can be appreciated that in the relay according to the embodiment of the present utility model, the deformation portion 533 is disposed between the contact portion 532 and the intermediate portion 531, and when the deformation portion 533 is deformed, the contact portion 532 can tilt relative to the intermediate portion 531, and the contact portion 532 drives the movable contact 540a to move relative to the stationary contact 520 a. The movable contact 540a moves relative to the stationary contact 520a, so that the adhesion area possibly generated between the movable contact 540a and the stationary contact 520a can be pulled away, the adhesion or burning loss problem between the movable contact 540a and the stationary contact 520a is avoided, the reliability of the product is improved, and the service life of the relay is prolonged.

It should be noted that, the moving manner of the movable contact 540a relative to the stationary contact 520a may be understood as twisting.

The process of moving the movable contact 540a relative to the stationary contact 520a is described in detail below with reference to fig. 7 and 8.

As shown in fig. 7, in the relay under the normal working condition, the current value flowing in the movable reed 530 is kept at the rated current, the rated current value is far smaller than the short-circuit current value, and at this time, the magnetic attraction generated between the first magnetizer 810 and the second magnetizer 820 is small, and the second magnetizer 820 is not attracted to move towards the direction approaching to the first magnetizer 810, so that the deformation portion 533 of the movable reed 530 is not deformed, and the movable contact 540a is not moved relative to the fixed contact 520 a. In contrast, the movable contact 540a maintains reliable contact with the stationary contact 520 a.

As shown in fig. 8, when a large fault current (for example, a short-circuit current) flows through movable reed 530, a large magnetic attraction force is generated between first magnetizer 810 and second magnetizer 820, and this magnetic attraction force can attract second magnetizer 820 to move in a direction approaching first magnetizer 810 together with intermediate portion 531. Since the deformation portion 533 is provided between the intermediate portion 531 of the movable spring 530 and the contact portion 532, when the intermediate portion 531 moves in the direction toward the first magnetizer 810, the contact portion 532 is tilted away from the stationary spring portion 502 with respect to the intermediate portion 531 by deformation of the deformation portion 533, and the contact portion 532 is tilted to drive the movable contact 540a to move with respect to the stationary contact 520 a.

Specifically, as shown in fig. 8, contact portion 532 located at the left end of movable spring 530 is inclined in the left-downward direction, and contact portion 532 located at the right end of movable spring 530 is inclined in the right-downward direction.

It will be appreciated that when the short circuit current is removed, spring 530 resets under the force of spring 530's own elasticity. During resetting, movable contact spring 530 can drive movable contact to move relative to stationary contact, so as to avoid secondary adhesion between movable contact and stationary contact.

In one embodiment, middle portion 531, contact portion 532 and deformation portion 533 of movable spring 530 are integrally formed, and movable spring 530 can be integrally formed of a flexible material.

Of course, in another embodiment, middle portion 531 and contact portion 532 of movable spring 530 may be made of a rigid material, and deformation portion 533 may be made of a flexible material.

As shown in fig. 6 to 8, the contact portion 50 further includes a current carrying member 550, and the current carrying member 550 is fixedly connected to a side of the intermediate portion 531 facing the first magnetizer 810. The current carrying member 550 is made of a conductive material. In one aspect, current carrying member 550 can enhance the current carrying capability of movable reed 530; on the other hand, the current carrying member 550 may increase the rigidity of the intermediate portion 531.

Further, the current-carrying member 550 has a plate shape, and the current-carrying member 550 covers the intermediate portion 531 and does not cover the deformed portion 533.

In an embodiment, the current-carrying member 550 and the middle portion 531 may be connected by riveting, but not limited thereto.

As shown in fig. 6, each contact portion 532 of movable spring 530 includes at least two arms 532a, and at least two arms 532a are connected to intermediate portion 531 via a deformation portion 533. Each arm 532a is provided with one movable contact 540a, and at least two movable contacts 540a of the contact portion 532 are arranged side by side along the width direction D2 of the movable spring 530. One stationary spring portion 502 includes at least two stationary contacts 520a, and at least two stationary contacts 520a of one stationary spring portion 502 correspond to at least two movable contacts 540a of one contact portion 532, respectively.

It will be appreciated that the electrical repulsive force between the moving contact 540a and the stationary contact 520a is proportional to the square of the current. In the embodiment of the present utility model, at least two movable contacts 540a are disposed on at least two arms 532a in a one-to-one correspondence, and the stationary spring portion 502 also includes at least two stationary contacts 520a, and the at least two stationary contacts 520a are in a one-to-one correspondence with the at least two movable contacts 540 a. Since the number of the movable contacts 540a increases and the movable contacts 540a are provided on the arm 532a, when the contacts are closed, the current value flowing between the pair of the stationary contacts 520a and the movable contacts 540a decreases, and thus the electric repulsive force between the movable contacts 540a and the stationary contacts 520a can be reduced. On the basis of ensuring the short circuit resistance, the thickness of the first magnetizer 810 and/or the second magnetizer 820 can be reduced, the cost is reduced, and meanwhile, the product performance can be improved.

In the embodiment of the present utility model, the contact portion 532 includes two arms 532a, and each arm 532a is provided with a movable contact 540a. Correspondingly, the stationary spring portion 502 includes two stationary contacts 520a, and two movable contacts 540a correspond to the two stationary contacts 520a, respectively.

Of course, the contact portion 532 may also include three, four, or other numbers of arms 532a.

As shown in fig. 6, the second magnetizer 820 includes a base 821 and two side portions 822, and the two side portions 822 are connected to opposite sides of the base 821, respectively. The base 821 is fixedly connected to a side of the middle portion 531 facing away from the first magnetizer 810, and the two side portions 822 are respectively provided on two opposite sides of the movable spring 530 in the width direction D2. Each side 822 has a pole face on a side facing first magnetic conductor 810.

As shown in fig. 4 and 6, the elastic member 90 is mounted on a side of the movable spring portion 501 facing away from the first magnetizer 810, and the movable spring portion 501 is disposed on the push rod mechanism 30 through the elastic member 90.

It will be appreciated that the resilient member 90 is mounted to the moving spring portion 501 such that during assembly of the relay, the resilient member 90 may be assembled with the moving spring portion 501 prior to the assembly of the resilient member 90 and moving spring portion 501 into the push rod mechanism 30. In this way, the assembly process is easy for the operator to operate and the assembly accuracy is easy to control.

As shown in fig. 4, a space S is provided between the elastic member 90 and the moving spring portion 501, and the second magnetizer 820 is provided in the space S.

As shown in fig. 9, the elastic member 90 includes two connection portions 910 and a first elastic portion 920. The two connection portions 910 are respectively and fixedly connected to the movable contacts 540a at both ends of the movable spring portion 501 in the length direction D1, and the first elastic portion 920 is disposed between the two connection portions 910 and is used for abutting against the push rod mechanism 30. The first elastic portion 920 is used to provide a contact pressure when the contact portion 50 is in a closed state.

The first resilient portion 920 includes a resilient frame 921 and at least one first resilient arm 922. The spring frame 921 is disposed between the two connection portions 910, and an opening 921a is provided in the middle of the spring frame 921. One end of the first elastic arm 922 is connected to the edge of the opening 921a, and the other end is for abutting against the push rod mechanism 30.

The number of first resilient arms 922 may be one, two, three, or other numbers. The number of the spring frames 921 may be one, two, three, or other numbers.

As shown in fig. 9, each of the connection portions 910 of the elastic member 90 includes at least two connection arms 912, and the at least two connection arms 912 are connected with the first elastic portion 920. The at least two connection arms 912 correspond to the at least two arms 532b, respectively, and the at least two connection arms 912 are connected to the at least two movable contacts 540a, respectively.

It will be appreciated that the number of attachment arms 912 of each attachment portion 910 corresponds to the number of arms 532b of each contact portion 532. In an embodiment of the present utility model, each of the connection portions 910 includes two connection arms 912.

The contact portion 532 has a first connection hole 532b, the connection portion 910 has a second connection hole 911 corresponding to the first connection hole 532b, and the movable contact 540a is inserted through the first connection hole 532b and the second connection hole 911, thereby realizing the rivet connection of the movable spring 530, the elastic member 90, and the movable contact 540 a. In this way, when movable contact 540a is swaged to movable spring 530, elastic member 90 can be swaged together. That is, in one caulking process, movable reed 530, elastic member 90, and movable contact 540a can be caulking-connected, which is convenient for processing operations and saves processing processes.

As shown in fig. 6, in the embodiment of the present utility model, the two arms 532a are provided with first connecting holes 532b, the two connecting arms 912 are provided with second connecting holes 911, the two second connecting holes 911 respectively correspond to the two first connecting holes 532b, and the movable contact 540a is inserted into the corresponding first connecting holes 532b and second connecting holes 911.

As shown in fig. 9 to 11, the elastic member 90 further includes a second elastic portion 930, and the second elastic portion 930 is connected to the first elastic portion 920, for providing an elastic force to the push rod mechanism 30 to move toward the first position when the push rod mechanism 30 is in the second position.

Since the second elastic portion 930 provides the push rod mechanism 30 with an elastic force that causes the push rod mechanism 30 to have a tendency to move toward the first position when the contact portion 50 is in the completely opened state, when the push rod mechanism 30 is required to move again (i.e., the contact portion 50 is switched to the closed state) to energize the coil 730, since the push rod mechanism 30 has been subjected to the elastic force exerted by the second elastic portion 930 at this time, the voltage at which the coil 730 is energized can be reduced, thereby reducing the operation voltage such that the magnitude of the operation voltage is within the standard range. The standard range of the operating voltage may be between 40% rated voltage and 60% rated voltage, but is not limited thereto.

In addition, the magnitude of the operation voltage of the relay can be flexibly adjusted by adjusting the magnitude of the elastic force applied by the second elastic portion 930. Specifically, when the elastic force provided by the second elastic portion 930 is increased, the operating voltage of the relay becomes smaller. When the elastic force provided by the second elastic portion 930 is reduced, the operation voltage of the relay is increased.

Further, when the relay has the permanent magnet 740 (i.e., the relay has a magnetic holding function), the magnitude of the reset voltage of the relay can be flexibly adjusted by adjusting the magnitude of the elastic force of the first elastic portion 920. Specifically, when the elastic force provided by the first elastic portion 920 is increased, the return voltage of the relay becomes smaller. When the elastic force provided by the first elastic portion 920 is reduced, the return voltage of the relay becomes larger accordingly.

Therefore, by adjusting the magnitude of the elastic force of the second elastic portion 930, the magnitude of the operation voltage can be adjusted independently without affecting the reset voltage, and by adjusting the magnitude of the elastic force of the first elastic portion 920, the magnitude of the reset voltage of the relay can be adjusted flexibly without affecting the operation voltage, so that the operation voltage and the reset voltage are in a state without a differential pressure. At this time, the permanent magnet 740 is only required to be magnetized or demagnetized, so that the magnetic holding force can be increased or reduced, and the action voltage and the reset voltage can be synchronously adjusted without adjusting the dispersion difference of other parts of the relay, thereby reducing the requirements on the precision of other parts.

It should be noted that, the magnitude of the elastic force of the second elastic portion 930 may be adjusted by changing the elastic modulus of the second elastic portion 930, for example, by changing the elastic modulus of the second elastic portion 930: the magnitude of the elastic force of the second elastic portion 930 may be adjusted by changing the deformation amount of the second elastic portion 930 in the uncompressed state, and the width of the second elastic portion 930 may be changed, but is not limited thereto.

As shown in fig. 10, when the push rod mechanism 30 is in the first position (the contact portion 50 is in the fully closed state), the second elastic portion 930 does not provide an elastic force to the push rod mechanism 30.

As shown in fig. 11, when the push rod mechanism 30 is in the second position (the contact portion 50 is in the completely opened state), one end of the second elastic portion 930 abuts against the movable spring 530, and the other end of the second elastic portion 930 abuts against the stopper 110 of the base 10.

Of course, in other embodiments, when the push rod mechanism 30 is in the second position, one end of the second elastic portion 930 abuts against the push rod 310 of the push rod mechanism 30, and the other end of the second elastic portion 930 abuts against the stop portion 110 of the base 10.

Note that the contact portion 50 being in the fully closed state means that: after the movable contact 540a and the stationary contact 520a of the contact portion 50 are contacted and when the over-stroke is completed, the contact portion 50 is in a state; the contact portion 50 being in the completely open state means that: after the movable contact 540a and the stationary contact 520a of the contact portion 50 are opened and at the maximum contact gap, the contact portion 50 is in a state.

Referring back to fig. 9, the second elastic portion 930 includes at least one second elastic arm 931, and when the push rod mechanism 30 is at the second position, one end of the second elastic arm 931 abuts against the movable spring 530, and the other end of the second elastic arm 931 abuts against the base 10.

In the embodiment of the present utility model, the elastic member 90 includes two second elastic portions 930, and the two second elastic portions 930 are connected to two opposite sides of the first elastic portion 920. And, each second elastic part 930 includes one second elastic arm 931, and each second elastic arm 931 is disposed between two connection arms 912.

Of course, in other embodiments, the anti-shorting structure 80 may also include the first magnetizer 810 and not the second magnetizer 820. First magnetizer 810 is provided on a side of movable reed 530 facing toward fixed reed portion 502.

When a short-circuit current passes through movable spring 530, a magnetic conductive loop is formed around movable spring 530 at the outer circumference in the length direction of movable spring 530. Because of the existence of the first magnetizer 810, most of the magnetic field of the magnetic conduction loop can be concentrated on the first magnetizer 810 and magnetize the first magnetizer 810, so that attraction force along the contact pressure direction can be generated between the first magnetizer 810 and the movable reed 530 through which current flows, and the attraction force can resist electric repulsive force generated between the movable contact and the fixed contact due to short-circuit current, so that the movable contact and the fixed contact are ensured not to spring open.

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

The relay according to the embodiment of the present utility model includes at least two moving spring portions 501, and one moving contact 540a is provided at both ends of each moving spring portion 501 in the length direction D1. The anti-shorting structure 80 includes a first magnetic conductor 810 and at least two second magnetic conductors 820. At least two movable spring portions 501 are arranged side by side along the width direction D2 of the respective movable springs 530. At least two second magnetizers 820 are fixedly connected to the middle parts 531 of at least two movable spring parts 501 in a one-to-one correspondence. One stationary spring portion 502 includes at least two stationary contacts 520a, and at least two stationary contacts 520a of one stationary spring portion 502 correspond to at least two movable contacts 540a of one end of at least two movable spring portions 501, respectively.

It will be appreciated that the current flowing in from one of the static spring portions 502 will be split into at least two paths after passing through at least two of the dynamic spring portions 501, and finally at least two paths of current will flow out from the other static spring portion 502. In this way, the contact portion 50 is closed to form a multi-contact parallel structure, which serves as a shunt. On one hand, the temperature rise near the contact is reduced; on the other hand, it is also advantageous to reduce the electromotive repulsive force between the movable contact 540a and the stationary contact 520 a.

The contact portion 50 further includes at least two current carrying members 550, and the at least two current carrying members 550 are fixedly connected to a side of the at least two intermediate portions 531 facing the first magnetizer 810 in a one-to-one correspondence. The connection and the function of the current-carrying member 550 can be referred to the first embodiment, and will not be described here.

In the embodiment of the present utility model, the relay includes two movable spring portions 501, and one movable contact 540a is disposed at each end of each movable spring portion 501 in the length direction D1. One stationary spring portion 502 includes two stationary contacts 520a, and the two stationary contacts 520a correspond to the two movable contacts 540a at one end of the two movable spring portions 501, respectively. The anti-short circuit structure 80 includes a first magnetizer 810 and two second magnetizers 820, where the two second magnetizers 820 are fixedly connected to the middle parts 531 of the two moving spring portions 501, respectively. The contact portion 50 includes two current carrying members 550.

Of course, in other embodiments, the number of moving spring portions 501 may also be three, four, etc. When the number of the movable spring parts 501 is changed, the number of the second magnetizers 820, the stationary contacts 520a of the stationary spring parts 502, and the current-carrying members 550 are also changed, and will not be described again here.

With continued reference to fig. 12, each second magnetic conductor 820 includes a base 821 and two sides 822. Two sides 822 are connected to opposite sides of the base 821, respectively. The base 821 is fixedly connected to a side of the middle portion 531 facing away from the first magnetizer 810, and the two side portions 822 are respectively provided on two opposite sides of the movable spring 530 in the width direction D2. Each side 822 has a pole face on a side facing first magnetic conductor 810. A through hole 534 is formed between two adjacent intermediate portions 531 of two adjacent movable springs 530. Two adjacent sides 822 of two adjacent second magnetic conductors 820 are disposed through the through-hole 534.

The resilient member 90 includes two spring tabs 940, each spring tab 940 including a connecting end 941 and a free end 942. The two free ends 942 of the two spring pieces 940 are close to each other in the longitudinal direction D1 of the moving spring portion 501. The connection ends 941 of the two spring pieces 940 are respectively connected to at least two movable contacts 540a at one end of the at least two movable spring portions 501 in the length direction D1, and the free ends 942 of the two spring pieces 940 are configured to abut against the push rod mechanism 30.

Each spring 940 includes at least two third elastic arms 943, where one end of each third elastic arm 943 is connected to the free end 942, and the other end is provided with a connecting end 941. The connection ends 941 of the at least two third elastic arms 943 of each spring piece 940 are respectively connected to at least two movable contacts 540a at one ends of the at least two movable spring portions 501 in the length direction D1. Each of the connection ends 941 is provided with a second connection hole 911, and the movable contact 540a sequentially penetrates through the first connection hole 532b of the movable spring 530 and the second connection hole 911 of the elastic sheet 940 to connect the elastic sheet 940 and the movable spring 530.

In the embodiment of the present utility model, each elastic sheet 940 includes two third elastic arms 943, and the connection ends 941 of the two third elastic arms 943 are respectively connected to two movable contacts 540a at one ends of the two movable spring portions 501.

It is understood that the number of third resilient arms 943 may be identical to the number of moving spring portions 501.

It should be noted that, under the condition that the contacts are on different surfaces, the structure of the two elastic sheets 940 in this embodiment can ensure that each contact can achieve over-travel reliable contact.

It should be noted that the relay according to the second embodiment of the present utility model may also employ the elastic member 90 according to the first embodiment.

As shown in fig. 13, the relay of the third embodiment has substantially the same structure in the basic structure as the relay of the first embodiment. Therefore, in the following description of the relay of the third embodiment, the structure already described in the first embodiment is not repeated. The same reference numerals are given to the same configurations as those of the relay described in the first embodiment. Therefore, in the following description of the present embodiment, differences from the relay of the first embodiment will be mainly described.

Both ends of movable contact spring 530 in the length direction D1 are provided with one movable contact 540a. Each stationary spring portion 502 includes a stationary contact 520a. Two stationary contacts 520a correspond to movable contacts 540a at both ends of movable reed 530, respectively.

Each second elastic portion 930 of the elastic member 90 includes two second elastic arms 931, and the connection portion 910 is located between the two second elastic arms 931.

It should be noted that the relay according to the third embodiment of the present utility model may also employ the elastic member 90 according to the first and second embodiments.

As shown in fig. 14, the relay of the fourth embodiment has substantially the same structure in the basic structure as the relay of the second embodiment. Therefore, in the following description of the relay of the fourth embodiment, the structure already described in the second embodiment is not repeated. The same reference numerals are given to the same configurations as those of the relay described in the second embodiment. Therefore, in the following description of the present embodiment, differences from the relay of the second embodiment will be mainly described.

In the present embodiment, the elastic member 90 includes at least two reeds 950, and the at least two reeds 950 are respectively connected to the at least two movable reed portions 501 in one-to-one correspondence.

Each reed 950 includes two connection portions 910 and a first elastic portion 920. The two connection portions 910 are fixedly connected to the moving spring portion 501, and the first elastic portion 920 is disposed between the two connection portions 910 and is used for abutting against the push rod mechanism 30. The first elastic portion 920 is used to provide a contact pressure when the contact portion 50 is in a closed state.

The first resilient portion 920 includes a resilient frame 921 and at least one first resilient arm 922. The spring frame 921 is disposed between the two connection portions 910, and an opening 921a is provided in the middle of the spring frame 921. One end of the first elastic arm 922 is connected to the edge of the opening 921a, and the other end is for abutting against the push rod mechanism 30.

The number of first resilient arms 922 may be one, two, three, or other numbers. The number of the spring frames 921 may be one, two, three, or other numbers.

As shown in fig. 14, each connecting portion 910 is provided with a second connecting hole 911 corresponding to the first connecting hole 532b of the movable contact spring 530, and the movable contact 540a is inserted through the first connecting hole 532b and the second connecting hole 911, thereby realizing the rivet connection of the movable contact spring 530, the spring 950 and the movable contact 540 a.

It should be noted that, in the case that the contacts are on different surfaces, the structure of at least two reeds 950 in this embodiment can ensure that each contact can achieve over-travel reliable contact.

It will be appreciated that in this embodiment, contact portion 50 does not include current carrying member 550, such that intermediate portion 531 of movable spring 530 is deformed when movable spring 530 is subjected to a fault high current.

As shown in fig. 15, the elastic member of the fifth embodiment has substantially the same structure in the basic configuration as the elastic member of the third embodiment. Therefore, in the following description of the elastic member of the fifth embodiment, the structure already described in the third embodiment is not repeated. The same reference numerals are given to the same structures as those of the elastic members described in the third embodiment. Therefore, in the following description of the present embodiment, mainly differences from the elastic member of the third embodiment will be described.

In this embodiment, the elastic member 90 further includes two connection sections 960, and two ends of each connection section 960 are respectively connected to one end of the corresponding second elastic arm 931 away from the elastic frame 921.

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," "pair of," "a" and "an" 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 (15)

1. A relay, comprising:

a contact portion including a moving spring portion and a pair of stationary spring portions; each static spring part comprises a static spring plate and a static contact arranged on the static spring plate; the movable spring part comprises a movable spring and a movable contact arranged on the movable spring; and

A short-circuit-resistant structure for generating a suction force in a contact pressure direction when a fault large current flows through the movable contact spring, so as to resist an electric repulsive force between the movable contact and the stationary contact;

when the movable reed circulates a fault high current, the movable reed can deform under the action of the suction force so as to drive the movable contact to move relative to the stationary contact.

2. The relay of claim 1, wherein the contact portion further comprises a current carrying member fixedly connected to the movable reed of the movable reed portion.

3. The relay according to claim 2, wherein the current carrying member has a plate shape.

4. The relay according to claim 1, wherein the movable contact spring includes a middle portion and two contact portions, the middle portion is provided between the two contact portions, and the movable contact is provided on both contact portions; a deformation part is arranged between at least one of the two contact parts and the middle part;

the deformation part is arranged to deform under the action of the suction force when the movable reed circulates fault heavy current, so as to drive the contact part to incline relative to the middle part in a direction away from the static spring part, and further drive the movable contact to move relative to the static contact.

5. The relay according to claim 4, wherein the contact portion includes one of the moving spring portions; the contact part comprises at least two support arms, and the at least two support arms are connected with the middle part through the deformation part; each support arm is provided with one movable contact;

one of the stationary spring portions includes at least two stationary contacts, and at least two stationary contacts of one of the stationary spring portions correspond to at least two movable contacts of one of the contact portions, respectively.

6. The relay according to claim 1, wherein the short-circuit resistant structure includes a first magnetizer and a second magnetizer, the first magnetizer and the pair of static spring portions are provided on one side of the moving spring portion, and the second magnetizer is provided on one side of the moving spring portion facing away from the first magnetizer and follows the moving spring portion;

and a magnetic conduction loop is formed between the first magnetic conductor and the second magnetic conductor.

7. The relay according to claim 6, wherein the contact portion includes at least two of the movable spring portions, the short-circuit resistant structure includes at least two of the second magnetic conductors, and at least two of the movable spring portions are arranged side by side in a width direction of the respective movable spring pieces; the at least two second magnetizers are arranged on one side of the at least two movable spring parts, which is opposite to the first magnetizer, in a one-to-one correspondence manner;

One stationary spring part comprises at least two stationary contacts, and at least two stationary contacts of one stationary spring part respectively correspond to at least two movable contacts of one end of at least two movable spring parts in the length direction.

8. The relay of claim 7, wherein each of the second magnetic conductors comprises a base and two side portions, the two side portions being connected to opposite sides of the base, respectively; the base part is fixedly connected to one side of the movable reed, which is opposite to the first magnetizer, and the two side parts are respectively arranged on two opposite side edges of the movable reed in the width direction; each side part is provided with a magnetic pole face towards one side of the first magnetizer;

a through hole is formed between two adjacent movable reeds;

two adjacent side parts of the two adjacent second magnetizers penetrate through the through holes.

9. The relay according to claim 7, wherein the contact portion further comprises at least two current carrying members, the at least two current carrying members being fixedly connected to a side of the at least two movable reeds facing the first magnetizer in one-to-one correspondence.

10. The relay according to claim 4, wherein the deformation portion is provided between each of the contact portions and the intermediate portion.

11. The relay of claim 4, wherein the intermediate portion, the contact portion, and the deformation portion are of unitary construction.

12. The relay of claim 1, wherein the relay further comprises:

a base;

a push rod mechanism movable relative to the base between a first position and a second position in a contact-separation direction of the movable contact and the stationary contact; when the push rod mechanism is positioned at the first position, the movable contact and the stationary contact are closed; when the push rod mechanism is positioned at the second position, the movable contact is disconnected from the stationary contact; and

an elastic member mounted to at least one of the moving spring portions; the movable spring portion is provided on the push rod mechanism by the elastic member for providing a contact pressure when the push rod mechanism is in the first position.

13. The relay of claim 12, wherein the anti-shorting structure comprises a first magnetizer disposed on a side of the moving spring portion facing the static spring portion;

The first magnetizer and the static reed are fixedly arranged on the base.

14. The relay of claim 1, wherein the anti-shorting structure comprises a first magnetizer disposed on a side of the movable spring portion facing the stationary spring portion.

15. A relay according to claim 6 or 14, wherein the first magnetizer is provided between a pair of the static spring portions.