Relay

Abstract

The utility model discloses a relay. The relay comprises a contact assembly and a stopper. The contact assembly comprises two movable spring parts which are arranged side by side, and a parallel circuit structure is formed when the two movable spring parts make contact with each other. The stop piece is arranged between the two movable spring parts and used for stopping the two movable spring parts, so that the deflection of bending deformation generated after the two movable spring parts attract each other due to the fact that current passes through the parallel circuit structure is smaller than or equal to a threshold value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric control devices, in particular to a relay. BACKGROUND

[0002] A relay is an electronic control device, which has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually applied in an automatic control circuit. The relay is actually a kind of "automatic switch" that controls a larger current with a smaller current. Therefore, it plays a role of automatic adjustment, safety protection, and conversion of circuits in the circuit.

[0003] As one type of relay, a magnetic latching relay includes two sets of moving spring parts. When the contacts of the two sets of moving spring parts are in contact, the relay is in a closed state. When the contacts of the two sets of moving spring parts are separated, the relay is in an open state. However, in the related art, when the contacts of the moving spring parts are closed, the contacts are prone to instantaneous disconnection, which in turn causes the contacts to splash, and in severe cases, even causes the relay to explode, which has a large safety hazard. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the present application provide a relay to solve the problem of instantaneous disconnection of relay contacts in the related art.

[0005] The relay of the embodiments of the present application comprises:

[0006] a contact assembly comprising two moving spring parts arranged side by side, the two moving spring parts forming a parallel circuit structure when in contact with each other; and

[0007] a stopper provided between the two moving spring parts, configured to stop the two moving spring parts, so that the deflection of the two moving spring parts due to the bending deformation caused by the current passing through the parallel circuit structure is less than or equal to a threshold value.

[0008] According to some embodiments of the present application, the stopper is made of an elastic material and is configured to be deformed when the two moving spring parts produce bending deformation and press the stopper.

[0009] When the deflection of the moving spring parts due to the bending deformation is equal to the threshold value, the attractive force between the two moving spring parts is equal to the sum of the first elastic force generated by the deformation of the stopper and the second elastic force generated by the deformation of the moving spring parts.

[0010] According to some embodiments of the present application, the two moving spring parts are a first moving spring part and a second moving spring part, the first moving spring part comprises a first moving spring piece, a first stationary contact and a second moving contact, the first stationary contact and the second moving contact are arranged at two ends of the first moving spring piece in the length direction, the second moving spring part comprises a second moving spring piece, a first moving contact and a second stationary contact, the first moving contact and the second stationary contact are arranged at two ends of the second moving spring piece in the length direction, the first moving contact is used to contact or separate from the first stationary contact and constitutes a first contact group, and the second moving contact is used to contact or separate from the second stationary contact and constitutes a second contact group.

[0011] The stopper is located between the first moving spring piece and the second moving spring piece and between the first contact group and the second contact group.

[0012] According to some embodiments of the present application, the relay further comprises a housing, the contact assembly and the stopper are located in the housing, and the stopper is connected to the housing.

[0013] According to some embodiments of the present application, the stopper and the housing are in an integrated structure.

[0014] According to some embodiments of the present application, the housing comprises a first housing and a second housing which are buckled together, and the stopper is integrally formed on an inner wall surface of the first housing or an inner wall surface of the second housing.

[0015] According to some embodiments of the present application, the stopper comprises a middle part, two first stopper parts and two second stopper parts, the middle part is provided with the first stopper part and the second stopper part at two ends in the length direction of the contact assembly respectively.

[0016] In the thickness direction of the contact assembly, the two first stopper parts are arranged at intervals, and the two second stopper parts are arranged at intervals.

[0017] According to some embodiments of the present application, the stopper is a hollow cylindrical structure, and one end of the cylindrical structure is connected to the housing.

[0018] According to some embodiments of the present application, the stopper and the housing are in a split structure.

[0019] According to some embodiments of the present application, an inner wall surface of the housing is provided with a slot, and the stopper is inserted into the slot.

[0020] According to some embodiments of the present application, the stopper comprises a connecting part and an elastic part, the connecting part is connected to the housing, the elastic part is connected to the connecting part and has a wave-shaped structure.

[0021] The elastic part comprises a plurality of wave crest segments and a plurality of wave trough segments, which are arranged alternately along the length direction of the contact assembly.

[0022] According to some embodiments of the present application, the stopper is made of rigid material;

[0023] When the deflection of the curved deformation of the moving spring part is less than the threshold value or no curved deformation occurs, the stopper has a gap with the moving spring part; when the deflection of the curved deformation of the moving spring part is equal to the threshold value, the stopper abuts against the moving spring part.

[0024] According to some embodiments of the present application, when the deflection of the curved deformation of the two moving spring parts is equal to the threshold value, the two moving spring parts still keep contact and form the parallel circuit structure.

[0025] According to some embodiments of the present application, when the deflection of the curved deformation of the two moving spring parts is greater than the threshold value, the two moving spring parts are disconnected or form a series circuit structure.

[0026] The above-mentioned one embodiment of the application has at least the following advantages or beneficial effects:

[0027] The relay of the embodiments of the present application comprises a stopper arranged between the two moving spring parts, which is used to stop the two moving spring parts, so that the deflection of the curved deformation of the two moving spring parts caused by the mutual attraction due to the current passing through the parallel circuit structure is less than or equal to a threshold value, which allows the two moving spring parts to produce a smaller curved deformation due to the suction force, and prevents the two moving spring parts from producing a larger curved deformation due to excessive suction. On the one hand, the stopper ensures that the two moving spring parts can produce a smaller curved deformation, which can ensure that a sufficient suction force can be generated between the two moving spring parts to resist the electric repulsion caused by the short-circuit current between the contacts, thereby avoiding the instantaneous disconnection of the contacts and the explosion of the relay. On the other hand, the stopper prevents the two moving spring parts from producing a larger curved deformation, so as to prevent the moving spring parts from being excessively deformed and the instantaneous disconnection of the contacts, and to avoid the problems of contact splashing and explosion of the relay. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 An exploded schematic view of the relay of the embodiments of the present application is shown.

[0029] Figure 2 A schematic view of the relay of the embodiments of the present application omitting the first housing is shown.

[0030] Figure 3 A schematic view of the curved deformation of the first moving spring sheet and the second moving spring sheet is shown.

[0031] Figure 4 Fig. 6 shows a schematic view of the stopper of the first embodiment integrally connected to the inner wall surface of the second housing.

[0032] Figure 5 Fig. 5 shows a schematic view of the stopper of the first embodiment integrally connected to the inner wall surface of the first housing.

[0033] Figure 6 Fig. 4 shows a schematic view of the stopper of the second embodiment integrally connected to the inner wall surface of the second housing.

[0034] Figure 7 Fig. 3 shows a schematic view of the stopper of the third embodiment mounted to the second housing.

[0035] Figure 8 Fig. 2 shows a schematic view of the stopper of the third embodiment.

[0036] In the drawings, the following signs are explained:

[0037] 100, housing; 110, first housing; 120, second housing; 121, slot;

[0038] 200, contact assembly; 200a, first contact group; 200b, second contact group; 210, first movable spring portion; 211, first movable spring piece; 212, first stationary contact; 213, second movable contact; 220, second movable spring portion; 221, second movable spring piece; 222, first movable contact; 223, second stationary contact;

[0039] 300, armature assembly; 310, fixing member; 331, oscillation shaft;

[0040] 500, coil assembly;

[0041] 600, stopper; 610, intermediate portion; 620, first stopper portion; 630, second stopper portion; 640, connecting portion; 650, elastic portion; 651, crest segment; 652, trough segment. DETAILED DESCRIPTION

[0042] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, the example embodiments can be implemented in many different 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. Like reference numerals refer to like elements throughout the figures, and thus description of the same will be simplified or omitted.

[0043] It is to be understood that the terms "including", "comprising", "having" and variations thereof herein are intended to cover all possible combinations of the listed steps or units and are not to be construed as limiting. For example, a process, method, system, product or apparatus that comprises a list of steps or units is not necessarily limited to only those steps or units that are listed, but can include additional steps or units that are not expressly listed or can include steps or units of which an otherwise indicated process, method, system, product or apparatus is comprised.

[0044] Embodiments of the present application provide a relay, which can be a latching relay, but is not limited thereto. As shown in Figure 1 The relay includes a housing 100, a contact assembly 200, an armature assembly 300, and a coil assembly 500. The contact assembly 200 is disposed in the housing 100 and has a closed state and an open state. The armature assembly 300 is disposed in the housing 100 and is configured to drive the contact assembly 200 to switch from the closed state to the open state and from the open state to the closed state. The coil assembly 500 is disposed in the housing 100 and is electromagnetically coupled to the armature assembly 300.

[0045] In an embodiment, as shown in Figure 1 The housing 100 can include a first housing 110 and a second housing 120, which are connected together and form a hollow chamber for accommodating the contact assembly 200, the armature assembly 300, and the coil assembly 500. The shape of the first housing 110 and the second housing 120 after being connected can have various embodiments, for example, in embodiments of the present application, the shape of the first housing 110 and the second housing 120 after being connected is a hollow cuboid. Of course, in other embodiments, the shape of the first housing 110 and the second housing 120 after being connected can also be a hollow cylinder, or other suitable shapes.

[0046] As an example, the second housing 120 is a cuboid shape with an opening, and the contact assembly 200, the armature assembly 300, and the coil assembly 500 are disposed in the second housing 120 through the opening of the second housing 120. The first housing 110 is plate-shaped, and the first housing 110 is buckled on the opening of the second housing 120 to form a hollow cuboid.

[0047] Of course, in other embodiments, the first housing 110 and the second housing 120 are both cuboid-shaped and have openings on one face, the opening of the first housing 110 and the opening of the second housing 120 are oppositely arranged, and the first housing 110 and the second housing 120 are buckled to form a hollow chamber for accommodating the contact assembly 200, the armature assembly 300, and the coil assembly 500.

[0048] As shown in Figure 1 and Figure 2As shown, the contact assembly 200 includes two moving spring portions, which are arranged side by side along the thickness direction of the moving spring portions. Moreover, the two moving spring portions form a parallel circuit structure when in contact. For ease of illustration, the two moving spring portions are defined as a first moving spring portion 210 and a second moving spring portion 220.

[0049] The first moving spring portion 210 includes a first moving spring sheet 211, a first stationary contact 212, and a second moving contact 213, which are respectively arranged at two ends of the first moving spring sheet 211 along the length direction of the first moving spring sheet 211. As an example, the first stationary contact 212 and the second moving contact 213 can be arranged on the first moving spring sheet 211 by riveting, but are not limited thereto.

[0050] The second moving spring portion 220 includes a second moving spring sheet 221, a first moving contact 222, and a second stationary contact 223, which are respectively arranged at two ends of the second moving spring sheet 221 along the length direction of the second moving spring sheet 221. As an example, the first moving contact 222 and the second stationary contact 223 can be arranged on the second moving spring sheet 221 by riveting, but are not limited thereto.

[0051] As shown, Figure 2 The first moving spring sheet 211 and the second moving spring sheet 221 are arranged side by side along the thickness direction of the moving spring sheets and are substantially parallel to each other. Along the side-by-side arrangement direction of the first moving spring sheet 211 and the second moving spring sheet 221, the first moving contact 222 corresponds to the first stationary contact 212, the first moving contact 222 is configured to contact or separate from the first stationary contact 212, and constitutes a first contact group 200a; the second moving contact 213 corresponds to the second stationary contact 223, the second moving contact 213 is configured to contact or separate from the second stationary contact 223, and constitutes a second contact group 200b. The first contact group 200a and the second contact group 200b are arranged spaced apart along the length direction of the contact assembly 200.

[0052] When the contact assembly 200 is in a closed state, the first moving contact 222 is in contact with the first stationary contact 212, and the second moving contact 213 is in contact with the second stationary contact 223, so that the first moving spring sheet 211 and the second moving spring sheet 221 form a parallel circuit structure. When the contact assembly 200 is in an open state, the first moving contact 222 is separated from the first stationary contact 212, and the second moving contact 213 is separated from the second stationary contact 223.

[0053] As shown, Figure 1As shown, the relay further comprises a fixed member 310 fixedly arranged in the housing 100. In an embodiment, the fixed member 310 is connected with the second housing 120, but is not limited thereto. The armature assembly 300 is located on the side of the second spring portion 220 facing away from the first spring portion 210. The armature assembly 300 is swingably connected to the fixed member 310 through a swing shaft 331, for driving the first spring leaf 211 and the second spring leaf 221 to move, respectively, so as to make the first movable contact 222 and the second movable contact 213 correspondingly contact or separate from the first stationary contact 212 and the second stationary contact 223, respectively. The coil assembly 500 is configured to drive the armature portion 330 to swing relative to the fixed member 310 in response to an input signal.

[0054] It should be noted that the inventor of the present application found in research that when the contact assembly 200 is in a closed state, the first spring portion 210 and the second spring portion 220 form a parallel circuit structure, the first spring leaf 211 and the second spring leaf 221 are substantially parallel, and the current direction passing through the first spring leaf 211 is the same as the current direction passing through the second spring leaf 221, so the first spring leaf 211 and the second spring leaf 221 attract each other. When a larger current flows through the contact assembly 200, a larger attractive force can be generated between the first spring leaf 211 and the second spring leaf 221, which further causes the first spring leaf 211 and the second spring leaf 221 to switch from the original parallel arrangement to bending deformation in the direction of approaching each other (as shown in FIG. 2B). Figure 3

[0055] For ease of description, only the bending deformation of the second spring leaf 221 will be taken as an example below, and the first spring leaf 211 can be referred to the second spring leaf 221, which will not be described here. When the deflection of the bending deformation of the second spring leaf 221 is large, the middle portion of the second spring leaf 221 will be warped upward, which further causes the free end (the end provided with the movable contact) of the second spring leaf 221 to be tilted downward, which further causes the outside of the first movable contact 222 on the second spring leaf 221 to be disconnected from the first stationary contact 212, and the contact disconnection phenomenon occurs. At the same time, when the bending deformation of the second spring leaf 221 continues to increase, the free end of the second spring leaf 221 will apply an abutting force to the armature portion 330, and the abutting force will drive the armature portion 330 to swing in the direction of contact disconnection, which ultimately causes the contacts of the relay to be instantaneously disconnected and the contact explosion phenomenon to occur, resulting in the failure of the relay.

[0056] As can be seen from the above analysis, the attraction between the first spring leaf 211 and the second spring leaf 221 to generate a larger bending deformation can cause the contact to be instantaneously disconnected.

[0057] Based on this, as Figure 2 ​As shown, the relay of the embodiment of the present application further comprises a stopper 600 connected to the inner wall surface of the second housing 120 and arranged between the first movable spring part 210 and the second movable spring part 220, for stopping the first movable spring part 210 and the second movable spring part 220, so that the deflection of the bending deformation of the two movable spring parts after being attracted to each other due to the current passing through the parallel circuit structure is less than or equal to a threshold value.

[0058] The relay of the embodiment of the present application comprises the stopper 600 arranged between the two movable spring parts, for stopping the two movable spring parts, so that the deflection of the bending deformation of the two movable spring parts after being attracted to each other due to the current passing through the parallel circuit structure is less than or equal to a threshold value, which allows the two movable spring parts to produce a smaller bending deformation due to the attraction force, and prevents the two movable spring parts from being excessively attracted to produce a larger bending deformation. On the one hand, the stopper 600 ensures that the two movable spring parts can produce a smaller bending deformation, so as to ensure that a sufficient attraction force can be generated between the two movable spring parts to resist the electric repulsion caused by the short-circuit current between the contacts, thereby avoiding the instantaneous opening of the contacts and the explosion of the relay. On the other hand, the stopper 600 prevents the two movable spring parts from producing a larger bending deformation, so as to prevent the movable spring parts from being excessively deformed to cause the instantaneous opening of the contacts, and to avoid the problems of contact spatter and explosion of the relay.

[0059] When the deflection of the bending deformation of the two movable spring parts is equal to the threshold value, the two movable spring parts still remain in contact and form the parallel circuit structure. When the deflection of the bending deformation of the two movable spring parts is greater than the threshold value, the two movable spring parts are disconnected or form a series circuit structure.

[0060] When the two movable spring parts are disconnected, it means that the first contact group 200a and the second contact group 200b are both disconnected, i.e., the first movable contact 222 is disconnected from the first stationary contact 212, and the second movable contact 213 is disconnected from the second stationary contact 223. When the two movable spring parts form a series circuit structure, it means that one of the first contact group 200a and the second contact group 200b is disconnected, i.e., the first movable contact 222 is disconnected from the first stationary contact 212, and the second movable contact 213 is connected to the second stationary contact 223, or the first movable contact 222 is connected to the first stationary contact 212, and the second movable contact 213 is disconnected from the second stationary contact 223.

[0061] It should be noted that the function of the stopper 600 is to prevent the first movable spring sheet 211 and the second movable spring sheet 221 from being excessively bent and deformed, but it does not prohibit the first movable spring sheet 211 and the second movable spring sheet 221 from being bent and deformed within a controllable range, i.e., when the deflection of the bending deformation of the first movable spring sheet 211 and the second movable spring sheet 221 is less than or equal to the threshold value, it is allowed.

[0062] Next, the working principle of the relay of the embodiment of the present application will be described in combination with the structure of the relay. Figure 3The bending deformation process of the first moving spring plate 211 and the second moving spring plate 221 is described in detail. When the first moving spring plate 211 and the second moving spring plate 221 are bent and deformed within a controllable range, for example, the first moving spring plate 211 is bent and deformed to a state of Al, and the second moving spring plate 221 is bent and deformed to a state of A2. Since the deflection of the bending deformation of the first moving spring plate 211 and the second moving spring plate 221 is small at this time and is less than a threshold value, the instantaneous disconnection of the contact is not caused, and the sufficient suction force between the first moving spring plate 211 and the second moving spring plate 221 is ensured to resist the electric repulsion. Therefore, the deflection of the bending deformation of Al and A2 is allowed.

[0063] When the first moving spring plate 211 and the second moving spring plate 221 are bent and deformed greatly, for example, the first moving spring plate 211 is bent and deformed to a state of B1, and the second moving spring plate 221 is bent and deformed to a state of B2. If the deflection of the bending deformation of the two moving spring plates reaches the threshold value at this time, since the deflection of the bending deformation of the first moving spring plate 211 and the second moving spring plate 221 is not greater than the threshold value at this time, the two moving spring parts still remain in contact and form a parallel circuit structure, so the deflection of the bending deformation of B1 and B2 is allowed.

[0064] Continuing to refer to Figure 3 , the first moving spring plate 211 and the second moving spring plate 221 are not provided with a stopper, and the middle part of the moving spring plate is excessively raised and the contacts at both ends are excessively tilted due to excessive suction of the first moving spring plate 211 and the second moving spring plate 221, for example, the first moving spring plate 211 is bent and deformed to a state of C1, and the second moving spring plate 221 is bent and deformed to a state of C2. If the deflection of the bending deformation of the two moving spring plates is greater than the threshold value at this time, the deflection of the bending deformation of C1 and C2 is prohibited.

[0065] In summary, when the deflection of the bending deformation of the first moving spring plate 211 and the second moving spring plate 221 is less than or equal to the threshold value (for example, the bending states of Al and A2 or the bending states of B1 and B2), it is allowed; when the deflection of the bending deformation of the first moving spring plate 211 and the second moving spring plate 221 is greater than the threshold value (for example, the bending states of C1 and C2), it is prohibited.

[0066] It should be noted that the "threshold value" here is the upper limit value of the deflection, which is related to various factors, such as: the size of the counterforce formed when the first moving spring plate 211 and the second moving spring plate 221 are bent and deformed, the size of the suction force between the first moving spring plate 211 and the second moving spring plate 221, the elastic modulus of the material of the first moving spring plate 211 and the second moving spring plate 221, the length of the first moving spring plate 211 and the second moving spring plate 221, the armature holding force, etc. Therefore, the size of the "threshold value" is not constant and should be specifically limited according to different relays.

[0067] As Figure 2As shown, the stopper 600 is located between the first moving spring plate 211 and the second moving spring plate 221, and between the first contact group 200a and the second contact group 200b.

[0068] In an embodiment, the stopper 600 can be made of an elastic material and configured to deform when the two moving spring portions press the stopper 600 due to the bending deformation. When the deflection of the bending deformation of the moving spring portions is equal to the threshold value, the suction force between the two moving spring portions is equal to the sum of the first elastic force generated by the deformation of the stopper 600 and the second elastic force generated by the deformation of the moving spring portions. The elastic material can be rubber, plastic, or other materials that can provide elastic force when deformed.

[0069] When the first moving spring plate 211 and the second moving spring plate 221 press the stopper 600 due to the suction force, the stopper 600 deforms and provides the first elastic force to the first moving spring plate 211 and the second moving spring plate 221 because the stopper 600 is made of an elastic material. The deformation amplitude of the stopper 600 is small in the initial stage of deformation, so the first elastic force provided is also small.

[0070] From the perspective of resisting electrodynamic repulsion, when the moving spring plates just contact the stopper 600, the first moving spring plate 211 and the second moving spring plate 221 can press the stopper 600 and produce bending deformation within a controllable range when they are attracted to each other because the stopper 600 is made of an elastic material. It can be seen that the deformation of the stopper 600 under pressure provides an elastic deformation space for the first moving spring plate 211 and the second moving spring plate 221, so that the first moving spring plate 211 and the second moving spring plate 221 can produce bending deformation within the range of deflection less than or equal to the threshold value to meet the requirement of the amount of elastic deformation needed to resist electrodynamic repulsion.

[0071] From the perspective of avoiding the phenomenon of instantaneous disconnection of the contact, when the first moving spring plate 211 and the second moving spring plate 221 flow a large current, the first moving spring plate 211 and the second moving spring plate 221 have a tendency to produce large bending deformation because the suction force between them is large. As the first moving spring plate 211 and the second moving spring plate 221 gradually press the stopper 600, the deformation of the stopper 600 becomes larger and larger, until the sum of the first elastic force generated by the deformation of the stopper 600 and the second elastic force generated by the deformation of the moving spring plate is equal to the suction force, and the first moving spring plate 211 and the second moving spring plate 221 will not continue to produce bending deformation. At this time, the stopper 600 plays a role in preventing the first moving spring plate 211 and the second moving spring plate 221 from producing excessive bending deformation.

[0072] As shown in FIG. 6, the stopper 600 is located between the first moving spring plate 211 and the second moving spring plate 221, and between the first contact group 200a and the second contact group 200b. Figure 4As shown in FIG. 6, the stopper 600 is connected to the inner wall surface of the second shell 120, and further, the stopper 600 and the second shell 120 are in an integrated structure.

[0073] As shown in FIG. 5, the stopper 600 is connected to the inner wall surface of the first shell 110, and further, the stopper 600 and the first shell 110 are in an integrated structure. Figure 5

[0074] As shown in FIG. 4, the stopper 600 includes an intermediate portion 610, two first stop portions 620 and two second stop portions 630. The intermediate portion 610 is respectively provided with the first stop portion 620 and the second stop portion 630 at both ends along the length direction of the contact assembly 200. Along the thickness direction of the contact assembly 200, the two first stop portions 620 are arranged at intervals, and the two second stop portions 630 are arranged at intervals. Figure 4

[0075] When the first movable spring 211 and the second movable spring 221 are bent and deformed, the first movable spring 211 simultaneously extrudes one of the first stop portions 620 and one of the second stop portions 630, and the second movable spring 221 simultaneously extrudes the other of the first stop portions 620 and the other of the second stop portions 630, so that the two first stop portions 620 are close to each other, and the two second stop portions 630 are close to each other.

[0076] As shown in FIG. 3, the stopper 600 can also be a hollow cylindrical structure, and one end of the cylindrical structure is connected to the inner wall surface of the second shell 120. Figure 6 In the embodiment of the present application, since the stopper 600 is a hollow cylindrical structure, when the first movable spring 211 and the second movable spring 221 extrude both sides of the cylindrical structure, the cylindrical structure can be slightly deformed to prevent the first movable spring 211 and the second movable spring 221 from being excessively bent and deformed.

[0077] It should be noted that the cross-sectional shape of the cylindrical structure can be a circular ring type, an elliptical ring type or other shapes that can be deformed under pressure and provide elastic force.

[0078] Of course, in other embodiments, one end of the cylindrical structure can also be connected to the inner wall surface of the first shell 110.

[0079] In an embodiment, the stopper 600 and the shell 100 can also be a split structure. For example, the stopper 600 is arranged on the second shell 120, or the stopper 600 is arranged on the first shell 110.

[0080] As shown in FIG. 2, the stopper 600 is arranged on the second shell 120.

[0081] Figure 7 ​​​As shown, the inner wall surface of the second shell 120 is provided with a slot 121, and the stopper 600 is inserted into the slot 121. Of course, in other embodiments, the stopper 600 can also be connected with the shell 100 by means of clamping, gluing, riveting, welding, etc., which are not listed one by one here.

[0082] As shown, the stopper 600 includes a connecting portion 640 and an elastic portion 650. The connecting portion 640 is connected with the shell 100, for example, the connecting portion 640 is inserted into the slot 121 of the second shell 120. The elastic portion 650 is connected with the connecting portion 640 and has a wave-shaped structure. The elastic portion 650 includes a plurality of wave crest segments 651 and a plurality of wave trough segments 652, and the wave crest segments 651 and the wave trough segments 652 are alternately arranged along the length direction of the contact assembly 200. Figure 8

[0083] When the first moving spring piece 211 and the second moving spring piece 221 produce bending deformation, the first moving spring piece 211 extrudes the plurality of wave crest segments 651, and the second moving spring piece 221 extrudes the plurality of wave trough segments 652.

[0084] It should be noted that the stopper 600 is not limited to being made of an elastic material, for example, the stopper 600 can also be made of a rigid material.

[0085] When the stopper 600 is made of a rigid material, when the deflection of the first moving spring piece 211 and the second moving spring piece 221 producing bending deformation is less than a threshold value or does not produce bending deformation, the stopper 600 has a gap with the first moving spring piece 211 and the second moving spring piece 221. When the deflection of the moving spring portion producing bending deformation is equal to the threshold value, the stopper 600 abuts against the first moving spring piece 211 and the second moving spring piece 221, respectively.

[0086] In the embodiments of the present application, the gap can provide a certain deformation space for the first moving spring piece 211 and the second moving spring piece 221, so that the first moving spring piece 211 and the second moving spring piece 221 can produce bending deformation within a controllable range when they attract each other. When the deflection of the bending deformation of the first moving spring piece 211 and the second moving spring piece 221 reaches the threshold value, the stopper 600 abuts against the first moving spring piece 211 and the second moving spring piece 221, respectively, to prevent the first moving spring piece 211 and the second moving spring piece 221 from producing excessive bending deformation.

[0087] In summary, the relay of the embodiments of the present application has at least the following advantages and beneficial effects:

[0088] ​The relay of the embodiments of the present application comprises a stopper 600 arranged between the two moving spring parts, which is used to stop the two moving spring parts, so that the deflection of the two moving spring parts caused by the bending deformation after being attracted to each other due to the current through the parallel circuit structure is less than or equal to a threshold value, which allows the two moving spring parts to produce a small bending deformation due to the suction force, and prevents the two moving spring parts from being excessively attracted to produce a large bending deformation. On the one hand, the stopper 600 ensures that the two moving spring parts can produce a small bending deformation, which can ensure that a sufficient suction force can be generated between the two moving spring parts to resist the electric repulsion caused by the short-circuit current between the contacts, thereby avoiding the instantaneous opening of the contacts and the explosion of the relay. On the other hand, the stopper 600 prevents the two moving spring parts from producing a large bending deformation, so as to prevent the moving spring parts from being excessively deformed to cause the instantaneous opening of the contacts, and to avoid the problems of contact splashing and explosion of the relay.

[0089] It can be understood that the various embodiments / implementation modes provided by the present application can be combined with each other without contradiction, which will not be illustrated one by one here.

[0090] In the embodiments of the present application, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0091] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0092] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0093] The above merely provides preferred embodiments of the application, and is not intended to limit the application. The application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall fall within the protection scope of the application.

Claims

1. A relay characterized by comprising: The relay comprises: a contact assembly comprising two moving spring parts arranged side by side, the two moving spring parts forming a parallel circuit structure when in contact with each other; and a stopper arranged between the two moving spring parts to stop the two moving spring parts from being bent to a deflection less than or equal to a threshold value when the two moving spring parts are attracted to each other due to current passing through the parallel circuit structure. The stopper is made of an elastic material and is configured to deform when the two moving spring parts are bent and press the stopper.

2. The relay according to claim 1, characterized in that When the deflection of the moving spring parts is equal to the threshold value, the attractive force between the two moving spring parts is equal to the sum of a first elastic force generated by the deformation of the stopper and a second elastic force generated by the deformation of the moving spring parts. The two moving spring parts are a first moving spring part and a second moving spring part, the first moving spring part comprises a first moving spring sheet, a first stationary contact and a second moving contact, the first stationary contact and the second moving contact are arranged at two ends of the first moving spring sheet in a length direction, the second moving spring part comprises a second moving spring sheet, a first moving contact and a second stationary contact, the first moving contact and the second stationary contact are arranged at two ends of the second moving spring sheet in a length direction, the first moving contact is used to contact or separate from the first stationary contact and constitutes a first contact group, and the second moving contact is used to contact or separate from the second stationary contact and constitutes a second contact group.

3. The relay of claim 1, wherein The stopper is located between the first moving spring sheet and the second moving spring sheet and between the first contact group and the second contact group. The relay further comprises a housing, the contact assembly and the stopper are located in the housing, and the stopper is connected to the housing.

4. A relay according to any one of claims 1-3, characterised in that The stopper and the housing are in an integrated structure.

5. The relay of claim 4, wherein The housing comprises a first housing and a second housing that are coupled together, and the stopper is integrally formed on an inner wall surface of the first housing or an inner wall surface of the second housing.

6. The relay of claim 5, wherein The stopper comprises an intermediate part, two first stopper parts and two second stopper parts, the intermediate part is provided with the first stopper part and the second stopper part at two ends in a length direction of the contact assembly respectively; 7. The relay of claim 5, wherein In a thickness direction of the contact assembly, the two first stopper parts are arranged at intervals, and the two second stopper parts are arranged at intervals. The stopper is in a hollow cylindrical structure, and one end of the cylindrical structure is connected to the housing.

8. The relay of claim 5, wherein The stopper and the housing are in a split structure.

9. The relay of claim 4, wherein, An inner wall surface of the housing is provided with a slot, and the stopper is inserted into the slot.

10. The relay of claim 9, wherein The stopper comprises a connecting part and an elastic part, the connecting part is connected to the housing, the elastic part is connected to the connecting part and is in a wave-shaped structure; 11. The relay of claim 9, wherein The elastic part comprises a plurality of wave crest segments and a plurality of wave trough segments, the wave crest segments and the wave trough segments are arranged alternately in a length direction of the contact assembly. The stopper is made of a rigid material.

12. The relay of claim 1, wherein ​ When the deflection of the dynamic spring part generating the bending deformation is less than the threshold value or no bending deformation occurs, the stopper and the dynamic spring part have a gap therebetween; when the deflection of the dynamic spring part generating the bending deformation is equal to the threshold value, the stopper and the dynamic spring part are in abutment.

13. The relay of claim 1, wherein When the deflection of the two dynamic spring parts generating the bending deformation is equal to the threshold value, the two dynamic spring parts still remain in contact and form the parallel circuit structure.

14. The relay of claim 1, wherein, When the deflection of the two dynamic spring parts generating the bending deformation is greater than the threshold value, the two dynamic spring parts are disconnected or form a series circuit structure.

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