CN219873343U - 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 at least two movable spring parts and a pair of static spring parts; each movable spring part comprises a movable reed and a movable contact, and movable contacts are arranged at two ends of the movable reed in the length direction; each static spring part comprises a static spring plate and a static contact arranged on the static spring plate; 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.

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 the relays, and the direct acting relay in the prior art includes a contact portion and a short circuit resistant structure. The contact portion includes two stationary spring portions and a movable spring portion. When the movable contact of the movable spring part is contacted with the fixed contact of the fixed spring part, current flows in from one fixed spring part, and flows out from the other fixed spring part after passing through the movable spring. The short-circuit-resistant structure is used for resisting electric repulsive force generated between the movable contact and the fixed contact when the movable spring part flows a large current, so that the movable contact and the fixed contact are prevented from being sprung.

However, the direct-acting relay in the prior art has the following technical problems: when the movable spring part passes through larger current, the electric repulsive force generated before the movable contact and the static contact is larger, so that the thickness of the magnetizer of the short-circuit resistant structure needs to be designed thicker, and the material cost and the volume of a product are not facilitated to be reduced.

Disclosure of Invention

The embodiment of the utility model provides a relay, which aims to solve the problems of higher cost and larger product volume in the prior art.

The relay of the embodiment of the utility model comprises:

a contact portion including at least two moving spring portions and a pair of stationary spring portions; each movable spring part comprises a movable reed and a movable contact, and the movable contacts are arranged at two ends of the movable reed in the length direction; each static spring part comprises a static spring plate and a static contact arranged on the static spring plate; and

and the short-circuit resistance structure is used for generating suction force along the contact pressure direction on each movable spring part when the movable spring is used for flowing fault high current so as to resist electric repulsive force between the movable contact and the static contact.

According to some embodiments of the utility model, at least two of the movable spring portions are arranged side by side along a width direction of the respective movable springs.

According to some embodiments of the present utility model, the short-circuit-resistant structure includes a first magnetizer and at least two second magnetizers, where the first magnetizer and a pair of static spring portions are disposed on one side of at least two moving spring portions, and the at least two second magnetizers are disposed on one side of at least two moving spring portions opposite to the first magnetizer and follow at least two moving spring portions;

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, 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 first magnetizer is disposed between a pair of the static spring portions.

According to some embodiments of the utility model, the short circuit resistant structure comprises a first magnetizer arranged on one side of at least two movable spring parts facing the static spring part.

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 the moving spring portion; 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, the first magnetizer being provided on a side of at least two of the movable spring portions facing the stationary spring portion;

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

According to some embodiments of the utility model, the movable reed is provided with a first connecting hole;

the elastic component is provided with a second connecting hole corresponding to the first connecting hole, and the movable contact penetrates through the first connecting hole and the second connecting hole so that the movable reed and the elastic component are riveted through the movable contact.

According to some embodiments of the present utility model, the short-circuit-resistant structure includes a first magnetizer and at least two second magnetizers, where the first magnetizer and a pair of static spring portions are disposed on one side of at least two moving spring portions, and the at least two second magnetizers are disposed on one side of at least two moving spring portions opposite to the first magnetizer and follow at least two moving spring portions; the first magnetizer and the second magnetizer are used for forming a magnetic conduction loop;

the elastic component is arranged on one side of the movable spring part, which is opposite to the first magnetizer, and an avoidance space is arranged between the elastic component and the movable spring part;

at least two second magnetizers are arranged in the avoidance space.

According to some embodiments of the utility model, the elastic member comprises:

the two connecting parts are respectively and fixedly connected to the movable spring part; and

the first elastic part is arranged between the two connecting parts and is used for abutting against the push rod mechanism.

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

and the second elastic part is connected with the first elastic part and is used for providing an elastic force for the push rod mechanism to move towards the first position when the push rod mechanism is in the second position.

According to some embodiments of the utility model, the second resilient portion does not provide a resilient force to the push rod mechanism when the push rod mechanism is in the first position.

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

the relay provided by the embodiment of the utility model comprises at least two movable spring parts and a pair of static spring parts, wherein each static spring part comprises a static spring and a static contact, and each movable spring part comprises a movable spring and a movable contact, so that a multi-contact parallel structure is formed after the contact parts are closed. Because the electric repulsive force between the movable contact and the static contact is proportional to the square of current, the contact part of the embodiment of the utility model realizes the shunting effect. On the one hand, the temperature rise near the contact is reduced. On the other hand, it is also advantageous to reduce the electric repulsive force between the movable contact and the stationary contact. On the basis of guaranteeing the short-circuit resistance, the volume of the short-circuit resistance structure can be reduced, the cost is reduced, the product performance can be improved, and the miniaturization of the product is facilitated.

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 shows a schematic rear view of the contact portion and the short circuit resistant structure after assembly.

Fig. 8 shows a schematic rear view of the elastic member assembled on the basis of fig. 7.

Fig. 9 is a perspective view showing an elastic member of a relay according to a second embodiment of the present utility model.

Fig. 10 is a schematic plan view showing a contact portion of a relay according to a second embodiment of the present utility model, the contact portion being in a fully closed state, and an elastic member being provided on a base.

Fig. 11 is a schematic plan view showing a contact portion of a relay according to a second embodiment of the present utility model, an elastic member being provided on a base, wherein the contact portion is in a completely opened state.

Fig. 12 is an exploded view showing an elastic member, a short-circuit resistant structure and a contact portion according to a third 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; 532b, first connection holes; 534. a through hole; 540a, movable contact;

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;

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 two moving spring portions 501 and a pair of stationary spring portions 502. The stationary spring portion 502 is fixedly mounted on the base 10, at least two movable spring portions 501 are mounted on the push rod mechanism 30 through the elastic member 90, and the movable spring portions 501 follow 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 two static contacts 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 the stationary contacts 520a may be two, three or four or more, and the plurality of stationary contacts 520a are not in contact with each other.

In the embodiment of the present utility model, one stationary spring part 502 includes two stationary contacts 520a. For convenience of description, the number of the stationary contacts 520a of one stationary spring 502 is taken as two as an example, but the utility model is not limited thereto.

Each movable spring portion 501 includes movable spring 530 and movable contact 540a, and movable contact 540a is provided at both ends of movable spring 530 in the length direction D1. In other words, each movable spring portion 501 includes one movable spring 530 and two movable contacts 540a, and the two movable contacts 540a are respectively provided at both ends of the movable spring 530 in the length direction D1.

At least two movable spring portions 501 are arranged side by side along the width direction D2 of the respective movable springs 530. In the embodiment of the present utility model, the contact portion 50 includes two moving spring portions 501. Of course, in other embodiments, the contact portion 50 may also include three or more moving spring portions 501. For convenience of explanation, the number of the movable spring portions 501 is two as an example, but the present utility model is not limited thereto.

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. In the embodiment of the present utility model, as shown in fig. 6, two movable contacts 540a at one end of two movable spring portions 501 respectively correspond to two stationary contacts 520a of one stationary spring portion 502, and two movable contacts 540a at the other end of two movable spring portions 501 respectively correspond to two stationary contacts 520a of the other 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.

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 520a.

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 at least two second magnetic conductors 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. The first magnetizer 810 and the pair of static spring portions 502 are provided at one side of at least two moving spring portions 501.

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.

At least two second magnetizers 820 are arranged on one side of the movable spring 530 of the at least two movable spring parts 501, which is opposite to the first magnetizer 810, in a one-to-one correspondence manner, and follow the movable spring 530. The second magnetizer 820 and the movable spring 530 may be connected by riveting, but not limited thereto. The first magnetizer 810 and the at least two second magnetizers 820 are respectively positioned at two sides of the movable spring 530, and when the movable spring 530 circulates current, a magnetic conduction loop is formed between the first magnetizer 810 and each 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 fault current (e.g., a short-circuit current) passes through the movable contact spring 530, a suction force is generated between the first magnetizer 810 and the second magnetizer 820 in the contact pressure direction, and the suction force can resist an electric repulsive force generated between the movable contact 540a and the stationary contact 520a due to the short-circuit current, so that the movable contact 540a and the stationary contact 520a cannot spring.

The number of second magnetizers 820 corresponds to the number of movable spring portions 501. In the embodiment of the utility model, the number of the second magnetizers 820 is two, but not limited thereto.

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. The current flowing in from one of the static spring portions 502 is 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 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 the 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 520a. 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 still another aspect, the thickness of the first magnetic conductor 810 and/or the second magnetic conductor 820 is reduced, and the volume of the relay is also reduced, which is advantageous for realizing miniaturization of the product. In other words, in the case of the first magnetizer 810 and/or the second magnetizer 820 having the same size, the short-circuit resistance efficiency can be improved.

In addition, since the at least two second magnetic conductors 820 are disposed in one-to-one correspondence with the movable springs 530 of the at least two movable spring portions 501, the at least two movable spring portions 501 move independently of each other. When the movable contact 540a of one of the movable spring portions 501 or the stationary contact 520a corresponding to the movable contact 540a is worn, the movement of the movable spring portion 501 does not interfere with the movement of the other movable spring portion 501, ensuring that each set of the corresponding movable contact 540a and stationary contact 520a in the contact portion 50 can reliably contact or separate.

In the embodiment of the present utility model, the relay includes two movable spring portions 501, and two ends of each movable spring portion 501 are provided with one movable contact 540a. 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 movable springs 530 of the two movable spring portions 501, respectively.

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 second magnetizer 820 and the stationary contact 520a of the stationary spring part 502 are also changed, and will not be illustrated here.

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. 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 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. 6-8, 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. Base 821 is fixedly attached to a side of movable reed 530 facing away from first magnetic conductor 810, and two side portions 822 are respectively provided on two opposite side edges in width direction D2 of movable reed 530. Each side 822 has a pole face on a side facing first magnetic conductor 810. A through hole 534 is formed between two adjacent movable reeds 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 the movable contacts 540a located at both ends of the movable spring portion 501 in the longitudinal direction, and the free ends 942 of the two spring pieces 940 are configured to abut against the push rod mechanism 30.

Each spring piece 940 includes at least two third elastic arms 943, and the at least two third elastic arms 943 correspond to at least two movable contacts 540a at one ends of the at least two movable spring portions 501. 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 movable spring 530 has first connection holes 532b at both ends in the length direction D1, and each of at least two connection ends 941 of one spring 940 has second connection holes 911 corresponding to at least two first connection holes 532 b. 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 rivet the elastic sheet 940 and the movable spring 530. Thus, when the movable contact 540a is riveted to the movable spring 530, the spring piece 940 can be simultaneously riveted. That is, in one riveting process, the movable spring 530, the spring sheet 940 and the movable contact 540a can be riveted, which is convenient for the processing operation and saves the processing process.

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.

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. 9, 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 elastic member 90 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. 9, each connecting portion 910 of the elastic member 90 includes at least two connecting arms 912, the at least two connecting arms 912 are connected with the first elastic portion 920, and the at least two connecting arms 912 correspond to the at least two movable contacts 540a of one ends of the at least two movable spring portions 501.

First connecting holes 532b are formed at both ends of the movable reed 530 in the length direction D1, each connecting arm 912 is provided with a second connecting hole 911 corresponding to the first connecting hole 532b, and the movable contact 540a is inserted into the first connecting hole 532b and the second connecting hole 911, so that the movable reed 530, the elastic member 90 and the movable contact 540a are connected by riveting. In the embodiment of the utility model, each connecting portion 910 includes two connecting arms 912, but is not limited thereto.

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 pressure difference. 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.

As shown in fig. 12, 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.

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. 12, 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 540a.

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 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 (13)

1. A relay, comprising:

a contact portion including at least two moving spring portions and a pair of stationary spring portions; each movable spring part comprises a movable reed and a movable contact, and the movable contacts are arranged at two ends of the movable reed in the length direction; each static spring part comprises a static spring plate and a static contact arranged on the static spring plate; and

and the short-circuit resistance structure is used for generating suction force along the contact pressure direction on each movable spring part when the movable spring is used for flowing fault high current so as to resist electric repulsive force between the movable contact and the static contact.

2. The relay according to claim 1, wherein at least two of the movable spring portions are arranged side by side in a width direction of the respective movable springs.

3. The relay according to claim 1, wherein the short-circuit resisting structure comprises a first magnetizer and at least two second magnetizers, the first magnetizer and a pair of static spring parts are arranged on one side of at least two moving spring parts, and the at least two second magnetizers are arranged on one side of at least two moving spring parts, which is opposite to the first magnetizer, and follow the at least two moving spring parts;

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

4. A relay according to claim 3, wherein each of the second magnetic conductors comprises a base portion and two side portions, the two side portions being connected to opposite sides of the base portion, 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.

5. A relay according to claim 3, wherein said first magnetizer is provided between a pair of said static spring portions.

6. The relay of claim 1, wherein the anti-shorting structure comprises a first magnetic conductor disposed on a side of at least two of the moving spring portions facing the stationary spring portion.

7. 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 the moving spring portion; 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.

8. The relay according to claim 7, wherein the short-circuit resistant structure includes a first magnetizer provided on a side of at least two of the movable spring portions toward the stationary spring portion;

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

9. The relay according to claim 7, wherein the movable reed is provided with a first connection hole;

the elastic component is provided with a second connecting hole corresponding to the first connecting hole, and the movable contact penetrates through the first connecting hole and the second connecting hole so that the movable reed and the elastic component are riveted through the movable contact.

10. The relay according to claim 7, wherein the short-circuit resisting structure comprises a first magnetizer and at least two second magnetizers, the first magnetizer and a pair of static spring parts are arranged on one side of at least two moving spring parts, and the at least two second magnetizers are arranged on one side of at least two moving spring parts, which is opposite to the first magnetizer, and follow the at least two moving spring parts; the first magnetizer and the second magnetizer are used for forming a magnetic conduction loop;

the elastic component is arranged on one side of the movable spring part, which is opposite to the first magnetizer, and an avoidance space is arranged between the elastic component and the movable spring part;

at least two second magnetizers are arranged in the avoidance space.

11. The relay of claim 7, wherein the resilient member comprises:

the two connecting parts are respectively and fixedly connected to the movable spring part; and

the first elastic part is arranged between the two connecting parts and is used for abutting against the push rod mechanism.

12. The relay of claim 11, wherein the resilient member further comprises:

and the second elastic part is connected with the first elastic part and is used for providing an elastic force for the push rod mechanism to move towards the first position when the push rod mechanism is in the second position.

13. The relay of claim 12, wherein the second resilient portion does not provide a resilient force to the push rod mechanism when the push rod mechanism is in the first position.