Relay

Abstract

The utility model discloses a relay which comprises a shell, a contact assembly, a fixing piece and an armature assembly. The contact assembly is arranged in the shell and comprises two contact parts, one contact part is provided with a first static contact, and the other contact part is provided with a first movable contact. The fixing piece is fixedly arranged in the shell, and the fixing piece and the shell are of a split structure. The fixed part is provided with a first arc extinguishing part, and the first arc extinguishing part is located around the first static contact and the first movable contact and used for extinguishing electric arcs generated between the first movable contact and the first static contact. And the armature assembly is arranged in the shell, is connected to the fixing piece in a swinging manner, and is used for driving the contact part provided with the first movable contact to move, so that the first movable contact is in contact with or separated from the first static contact.

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 uses a small current to control a large current. Therefore, it plays a role of automatic regulation, safety protection, and conversion of circuits in the circuit.

[0003] As one type of relay, a magnetic latching relay includes a housing and two groups of contact portions arranged in the housing, and the two groups of contact portions have a closed state and an open state. When the two groups of contact portions are switched between the closed state and the open state, an arc is easily generated between the moving contact and the stationary contact.

[0004] In the related art, in order to enhance the arc extinguishing effect, a ceramic sheet is usually arranged near the moving contact and the stationary contact, and the ceramic sheet is arranged on the inner wall surface of the housing. However, due to poor dimensional accuracy of the housing, the position of the ceramic sheet mounted on the housing is prone to deviation, thereby affecting the positional accuracy between the ceramic sheet and the moving contact and the stationary contact, and ultimately affecting the arc extinguishing effect of the ceramic sheet. UTILITY MODEL CONTENT

[0005] The relay provided by the embodiments of the present application solves the problem of low installation accuracy of the ceramic sheet and affects the arc extinguishing effect in the related art. The relay of the embodiments of the present application includes:

[0006] a housing;

[0007] a contact assembly arranged in the housing and including two contact portions, one of which has a first stationary contact and the other of which has a first moving contact;

[0008] a fixing member fixedly arranged in the housing and in a separate structure with the housing, the fixing member being provided with a first arc extinguishing member, the first arc extinguishing member being located around the first stationary contact and the first moving contact and used for extinguishing an arc generated between the first moving contact and the first stationary contact; and

[0009] an armature assembly arranged in the housing and swingably connected to the fixing member, used for driving the contact portion provided with the first moving contact to move, so that the first moving contact contacts or separates from the first stationary contact.

[0010] According to some embodiments of the present application, one of the contact portions of the contact assembly further comprises a first movable contact and a second movable contact, the first stationary contact and the second movable contact are both arranged on the first movable contact, the other of the contact portions further comprises a second movable contact and a second stationary contact, the first movable contact and the second stationary contact are both arranged on the second movable contact, the first movable contact and the second movable contact are arranged side by side;

[0011] The armature assembly is configured to drive the first movable contact and the second movable contact to contact or separate from the first stationary contact and the second stationary contact, respectively;

[0012] In the off state of the contact assembly, the contact gap between the first movable contact and the first stationary contact is smaller than the contact gap between the second movable contact and the second stationary contact.

[0013] According to some embodiments of the present application, the armature assembly is swingably connected to the fixed member through a swing axis;

[0014] Along the axial direction of the swing axis, the first arc extinguishing member is located on one side of the first stationary contact and the first movable contact.

[0015] According to some embodiments of the present application, the fixed member and the first arc extinguishing member are connected by an integral injection molding method.

[0016] According to some embodiments of the present application, the fixed member has a mounting hole, the mounting hole penetrates the fixed member along the thickness direction of the fixed member, and the first arc extinguishing member is arranged in the mounting hole.

[0017] According to some embodiments of the present application, the side of the fixed member away from the first movable contact and the first stationary contact has a sink, and the mounting hole penetrates the bottom surface of the sink;

[0018] The first arc extinguishing member comprises a first base plate and a first protruding portion, the first base plate is located in the sink and overlaps the bottom surface of the sink, the first protruding portion is arranged on the side surface of the first base plate facing the first movable contact and the first stationary contact, and is arranged in the mounting hole and inserted between the two contact portions.

[0019] According to some embodiments of the present application, the first protruding portion has a first notch at the end away from the first base plate, the shape of the first notch is matched with the outer peripheral shape of the first movable contact and the first stationary contact after being closed, so that the first protruding portion covers part of the outer periphery of the first movable contact and the first stationary contact.

[0020] According to some embodiments of the present application, the relay further comprises a second arc extinguishing member, which is arranged on an inner wall surface of the housing and located around the first stationary contact and the first movable contact, for extinguishing an arc generated between the first movable contact and the first stationary contact.

[0021] According to some embodiments of the present application, the armature assembly is swingably connected to the fixing member through a swing axis.

[0022] The first arc extinguishing member and the second arc extinguishing member are respectively located on two sides of the first stationary contact and the first movable contact along an axial direction of the swing axis.

[0023] According to some embodiments of the present application, the first arc extinguishing member has a first notch which is adapted to the shape of the outer periphery of the first movable contact and the first stationary contact after being closed, the second arc extinguishing member has a second notch which is adapted to the shape of the outer periphery of the first movable contact and the first stationary contact after being closed, the first notch and the second notch are oppositely arranged along the axial direction of the swing axis, and the first movable contact and the first stationary contact are located within a ring-shaped frame formed by the first notch and the second notch after being closed.

[0024] According to some embodiments of the present application, the first arc extinguishing member and / or the second arc extinguishing member is made of ceramic material.

[0025] According to some embodiments of the present application, the fixing member comprises:

[0026] a fixing portion which is fixedly connected to the housing and located on a side of the other contact portion which is away from one of the contact portions, and the armature assembly is swingably connected to the fixing portion; and

[0027] an extending portion which is connected to the fixing portion and located around the first movable contact and the first stationary contact, and the first arc extinguishing member is arranged on the extending portion.

[0028] According to some embodiments of the present application, one of the fixing member and the housing has a plug-in portion, and the other has a plug-in slot, and the plug-in portion is detachably plugged into the plug-in slot.

[0029] The above-mentioned embodiment has at least the following advantages or beneficial effects:

[0030] In the relay of this application embodiment, the first arc-extinguishing element is mounted on the fixing element instead of the housing. Since the fixing element serves to install the armature assembly and is a separate structure from the housing, the dimensional accuracy of the fixing element can be designed to be high. As a result, after the first arc-extinguishing element is mounted on the fixing element, the positional accuracy between the first arc-extinguishing element and the first moving contact and the first stationary contact is also guaranteed, thereby improving the arc-extinguishing effect of the first arc-extinguishing element.

[0031] Furthermore, the first arc-extinguishing element is made of ceramic material. On the one hand, ceramic material has a better cooling effect, which enables the first arc-extinguishing element to effectively cool the arc generated between the first moving contact and the first stationary contact, further improving the arc-extinguishing effect; on the other hand, ceramic material has a good heat insulation effect, which can prevent the heat of the arc generated between the first moving contact and the first stationary contact from being conducted to the outer casing; furthermore, the first arc-extinguishing element can also play an arc-blocking role, preventing the arc from burning the outer casing.

[0032] Furthermore, the fixing component and the first arc-extinguishing component are connected by an integral injection molding process, which eliminates the need for baking during the connection process and significantly improves the production efficiency of the product.

[0033] Furthermore, the first protrusion protrudes from the surface of the first substrate facing the first moving contact and the first stationary contact, and the distance between the first protrusion and the first moving contact and the first stationary contact is closer, which enhances the cooling effect of the first arc extinguishing element.

[0034] Furthermore, the outer periphery of the first moving contact and the first stationary contact is basically completely surrounded by the first arc-extinguishing element and the second arc-extinguishing element. When an electric arc is generated between the first moving contact and the first stationary contact, the first arc-extinguishing element and the second arc-extinguishing element can extinguish the arc in time and prevent the arc from escaping from the annular frame formed by the first arc-extinguishing element and the second arc-extinguishing element to a certain extent and burning the outer shell. Attached Figure Description

[0035] Figure 1 The diagram shown is a perspective view of a relay according to an embodiment of this application.

[0036] Figure 2 The diagram shown is an exploded view of a relay according to an embodiment of this application.

[0037] Figure 3 The diagram shown is a schematic of a relay in an embodiment of this application with the first housing omitted.

[0038] Figure 4 What is shown is Figure 3 A schematic diagram omitting the fixing component and the first arc-extinguishing component.

[0039] Figure 5 The diagram shown is a three-dimensional schematic of the assembly of the fixing component and the first arc-extinguishing component.

[0040] Figure 6 A perspective view of the fixing member is shown.

[0041] Figure 7 A perspective view of the first arc extinguishing member is shown.

[0042] Figure 8 A schematic view of the first notch of the first protruding part, the second notch of the second protruding part and the position relationship of the arc-resistant terminal contact set is shown.

[0043] In the drawings:

[0044] 100, housing; 110, first housing; 120, second housing; 121, slot;

[0045] 200, contact assembly; 200a, arc-resistant terminal contact set; 200b, current-carrying terminal contact set; 210, first contact part; 211, first movable contact spring; 212, first stationary contact; 213, second movable contact; 220, second contact part; 221, second movable contact spring; 222, first movable contact; 223, second stationary contact;

[0046] 300, armature assembly; 310, fixing member; 311, mounting hole; 312, sink; 313, fixing part; 314, extending part; 315, plug-in part; 320, first arc extinguishing member; 321, first base plate; 322, first protruding part; 323, first notch; 331, swing axis;

[0047] 400, second arc extinguishing member; 410, second base plate; 420, second protruding part; 421, second notch;

[0048] 500, coil assembly;

[0049] 601, first lead-out part; 602, second lead-out part. DETAILED DESCRIPTION

[0050] 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 scope 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.

[0051] 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.

[0052] The embodiments of the present application provide a relay, which can be a latching relay, but is not limited thereto. As shown in Figure 1 and Figure 2 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.

[0053] In an embodiment, as shown in Figure 2 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 after being connected to the second housing 120 can have various embodiments, for example, in the embodiments of the present application, the shape of the first housing 110 after being connected to the second housing 120 is a hollow cuboid. Of course, in other embodiments, the shape of the first housing 110 after being connected to the second housing 120 can also be a hollow cylinder or other suitable shape.

[0054] 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.

[0055] 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 is oppositely arranged with the opening of the second housing 120, 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.

[0056] As shown in Figure 2 and Figure 4As shown, the contact assembly 200 includes two contact portions, which are arranged side by side along the thickness direction of the contact portions. For ease of illustration, the two contact portions are defined as a first contact portion 210 and a second contact portion 220, respectively.

[0057] The first contact portion 210 includes a first moving spring piece 211, a first stationary contact 212, and a second moving contact 213, which are respectively arranged at two ends of the first moving spring piece 211 in the length direction of the first moving spring piece 211. As an example, the first stationary contact 212 and the second moving contact 213 can be arranged on the first moving spring piece 211 by riveting, but are not limited thereto.

[0058] The second contact portion 220 includes a second moving spring piece 221, a first moving contact 222, and a second stationary contact 223, which are respectively arranged at two ends of the second moving spring piece 221 in the length direction of the second moving spring piece 221. As an example, the first moving contact 222 and the second stationary contact 223 can be arranged on the second moving spring piece 221 by riveting, but are not limited thereto.

[0059] As shown, Figure 4 the first moving spring piece 211 and the second moving spring piece 221 are arranged side by side along the thickness direction of the moving spring pieces and are substantially parallel to each other. Along the side-by-side arrangement direction of the first moving spring piece 211 and the second moving spring piece 221, the first moving contact 222 corresponds in position to the first stationary contact 212, and the first moving contact 222 is configured to contact or separate from the first stationary contact 212; the second moving contact 213 corresponds in position to the second stationary contact 223, and the second moving contact 213 is configured to contact or separate from the second stationary contact 223.

[0060] When the contact assembly 200 is in the closed state, the first moving contact 222 contacts the first stationary contact 212, and the second moving contact 213 contacts the second stationary contact 223, so that the first moving spring piece 211 and the second moving spring piece 221 form a parallel loop structure. When the contact assembly 200 is in the open state, the first moving contact 222 separates from the first stationary contact 212, and the second moving contact 213 separates from the second stationary contact 223.

[0061] As shown, Figure 2 and Figure 4 the first contact portion 210 further includes a first lead-out piece 601, and the second contact portion 220 further includes a second lead-out piece 602, which are respectively configured to electrically connect with the positive electrode and the negative electrode of a load. Part of the first lead-out piece 601 extends out of the outer surface of the housing 100, and part of the second lead-out piece 602 extends out of the outer surface of the housing 100.

[0062] In one embodiment, the first lead-out piece 601 is riveted to the first moving spring piece 211 and the first stationary contact 212, and the second lead-out piece 602 is riveted to the second moving spring piece 221 and the second stationary contact 223.

[0063] Of course, in other embodiments, the first contact portion 210 and the second contact portion 220 are not limited to a parallel circuit structure when closed. For example, in another embodiment, the first contact portion 210 includes a first lead-out piece 601 and a first stationary contact 212, with the first stationary contact 212 disposed on the first lead-out piece 601. The second contact portion 220 includes a second moving spring 221 and a first moving contact 222, with the first moving contact 222 disposed on the second moving spring 221. The armature assembly 300 is used to drive the second moving spring 221 to move, so that the first moving contact 222 contacts or separates from the first stationary contact 212.

[0064] like Figure 2 , Figure 3 and Figure 5 As shown, the relay also includes a fixing member 310, which is fixedly installed inside the housing 100. The fixing member 310 and the housing 100 are separate structures. The fixing member 310 is provided with a first arc-extinguishing member 320, which is located around the first stationary contact 212 and the first moving contact 222, and is used to extinguish the electric arc generated between the first moving contact 222 and the first stationary contact 212.

[0065] The armature assembly 300 is located on the side of the second contact portion 220 facing away from the first contact portion 210. The armature assembly 300 is pivotally connected to the fixing member 310 and is used to drive the first moving spring 211 and the second moving spring 221 to move, respectively, so that the first moving contact 222 and the second moving contact 213 respectively contact or separate from the first stationary contact 212 and the second stationary contact 223. The coil assembly 500 is configured to drive the armature assembly 300 to pivot relative to the fixing member 310 in response to an input signal.

[0066] The relay of the embodiment of the present application, the first arc extinguishing member 320 is installed on the fixing member 310 instead of being installed on the shell 100. Since the fixing member 310 plays the role of installing the armature assembly 300 and is in a separate structure from the shell 100, the size precision of the fixing member 310 can be designed to be higher, and then after the first arc extinguishing member 320 is installed on the fixing member 310, the position precision between the first arc extinguishing member 320 and the first moving contact 222 and the first stationary contact 212 is also guaranteed, and the arc extinguishing effect of the first arc extinguishing member 320 is improved. In addition, compared with the prior art in which the first arc extinguishing member 320 is fixedly installed on the shell 100, which causes the position of the lead-out sheet to interfere with and limit the assembly of the first shell 110 and the second shell 120, the relay of the embodiment of the present application, by installing the first arc extinguishing member 320 on the fixing member 310, i.e. the first arc extinguishing member 320 is installed inside the shell 100, so that when the first shell 110 and the second shell 120 are assembled, the change in the position of the lead-out sheet can be avoided to affect the assembly of the first shell 110 and the second shell 120.

[0067] As shown in Figure 1 and Figure 2 The armature assembly 300 is swingably connected to the fixing member 310 through a swing shaft 331. Figure 1 Along the axial direction of the swing shaft 331, the first arc extinguishing member 320 is located on one side of the first moving contact 222 and the first stationary contact 212.

[0068] In an embodiment, when the contact assembly 200 is in the open state, the contact gap between the first moving contact 222 and the first stationary contact 212 is smaller than the contact gap between the second moving contact 213 and the second stationary contact 223.

[0069] Next, for the convenience of description, the first moving contact 222 and the first stationary contact 212 with smaller contact gap are defined as the arc-resistant end contact group 200a, and the second moving contact 213 and the second stationary contact 223 with larger contact gap are defined as the current-carrying end contact group 200b.

[0070] Since the contact gap of the arc-resistant end contact group 200a is smaller than the contact gap of the current-carrying end contact group 200b when the contact assembly 200 is in the open state, the current-carrying end contact group 200b will be disconnected before the arc-resistant end contact group 200a during the process of switching the contact assembly 200 from the closed state to the open state, and the arc-resistant end contact group 200a has not been completely disconnected when the current-carrying end contact group 200b is just disconnected. Therefore, the current-carrying end contact group 200b plays the role of carrying current, and the arc-resistant end contact group 200a plays the role of arc resistance. In other words, the arc-resistant end contact group 200a will generate an arc, while the current-carrying end contact group 200b will not generate an arc.

[0071] In the embodiment of the present application, the first arc extinguishing member 320 is arranged only around the first movable contact 222 and the first stationary contact 212 (i.e., the arc-resistant end contact group 200a) capable of generating an arc, and is not arranged around the second movable contact 213 and the second stationary contact 223 (i.e., the current-carrying end contact group 200b) incapable of generating an arc, so as to achieve a "targeted" arrangement. Instead of arranging the first arc extinguishing member 320 around both the arc-resistant end contact group 200a and the current-carrying end contact group 200b, the material cost is saved.

[0072] It can be understood that the contact gaps of the arc-resistant end contact group 200a and the current-carrying end contact group 200b are designed to be different, which can be achieved by reducing the contact height, but is not limited thereto.

[0073] In an embodiment, the first arc extinguishing member 320 is made of a ceramic material. On the one hand, the ceramic material has a better cooling effect, so that the first arc extinguishing member 320 has a good cooling effect on the arc generated between the first movable contact 222 and the first stationary contact 212, further improving the arc extinguishing effect. On the other hand, the ceramic material has a good heat insulation effect, which can prevent the heat generated between the first movable contact 222 and the first stationary contact 212 from being conducted to the housing 100. On the other hand, the first arc extinguishing member 320 can also play a role in blocking the arc to prevent the arc from ablation of the housing 100.

[0074] Of course, in other embodiments, the first arc extinguishing member 320 can also be made of other materials having a cooling and / or heat insulation effect, which will not be listed one by one here.

[0075] In an embodiment, the fixing member 310 is made of plastic, and the fixing member 310 and the first arc extinguishing member 320 are connected by an integral injection molding method.

[0076] It should be noted that in the related art, the first arc extinguishing member 320 is usually installed on the inner wall surface of the first housing 110 by a dispensing method. With the dispensing method, a subsequent baking process is required, which results in a longer product production cycle.

[0077] In the embodiment of the present application, the fixing member 310 and the first arc extinguishing member 320 are connected by an integral injection molding method, and the connection process of the fixing member 310 and the first arc extinguishing member 320 does not require baking, which significantly improves the production efficiency of the product.

[0078] Of course, in other embodiments, the fixing member 310 and the first arc extinguishing member 320 can also be connected by clamping, riveting, welding, etc., which will not be listed one by one here.

[0079] As Figure 5 and Figure 6The fixing member 310 includes a fixing part 313 and an extension part 314. The fixing part 313 is fixedly connected to the second housing 120 and is located on the side of the second contact part 220 opposite to the first contact part 210. The armature assembly 300 is pivotally connected to the fixing part 313. The extension part 314 is connected to the fixing part 313 and is located around the first moving contact 222 and the first stationary contact 212. The first arc-extinguishing member 320 is mounted on the extension part 314.

[0080] The extension 314 has a mounting hole 311, which extends through the extension 314 along the thickness direction of the fastener 310, and the first arc-extinguishing member 320 passes through the mounting hole 311.

[0081] The extension 314 of the fixing member 310 has a groove 312 on the side facing away from the first moving contact 222 and the first stationary contact 212, and the mounting hole 311 penetrates the bottom surface of the groove 312. The first arc extinguishing member 320 includes a first base plate 321 and a first protrusion 322. The first base plate 321 is located in the groove 312 and overlaps the bottom surface of the groove 312. The first protrusion 322 is provided on the surface of the first base plate 321 facing the first moving contact 222 and the first stationary contact 212, and passes through the mounting hole 311 and is inserted between the first moving spring 211 and the second moving spring 221.

[0082] In the embodiments of this application, the first protrusion 322 protrudes from the surface of the first substrate 321 facing the first moving contact 222 and the first stationary contact 212. The distance between the first protrusion 322 and the first moving contact 222 and the first stationary contact 212 is closer, which enhances the cooling effect of the first arc extinguishing member 320.

[0083] It should also be noted that the extension 314 is provided with a recess 312, and the first base plate 321 of the first arc extinguishing member 320 overlaps the bottom surface of the recess 312. This allows the first arc extinguishing member 320 to be installed by first connecting the fixing member 310 to the second housing 120, and then directly overlapping the first arc extinguishing member 320 with the bottom surface of the recess 312 and connecting the first housing 110 to the second housing 120 without any other auxiliary connection process. This not only achieves the limiting and anti-detachment of the first arc extinguishing member 320, but also simplifies the installation process.

[0084] like Figure 5 and Figure 7 As shown, the first protrusion 322 has a first notch 323 at one end away from the first substrate 321. The shape of the first notch 323 is adapted to the outer periphery shape of the first moving contact 222 and the first stationary contact 212 after they are closed, so that the first protrusion 322 covers part of the outer periphery of the first moving contact 222 and the first stationary contact 212.

[0085] In the embodiment, the shape of the first gap 323 is adapted to the shape of the outer periphery of the first movable contact 222 and the first fixed contact 212 after the first movable contact 222 and the first fixed contact 212 are closed, so that the first protruding part 322 can cover part of the outer periphery of the first movable contact 222 and the first fixed contact 212. In this way, the first protruding part 322 covers a larger area of the first movable contact 222 and the first fixed contact 212, and further enhances the cooling effect of the first arc extinguishing member 320.

[0086] In an embodiment, the shape of the first gap 323 can be semicircular, but is not limited thereto.

[0087] Please refer back to Figure 2 The relay further includes a second arc extinguishing member 400, which is arranged on the inner wall surface of the shell 100 and located around the first movable contact 222 and the first fixed contact 212, and is used to extinguish the arc generated between the first movable contact 222 and the first fixed contact 212. In the embodiment, the second arc extinguishing member 400 is arranged on the inner wall surface of the second shell 120.

[0088] In an embodiment, the second arc extinguishing member 400 is made of ceramic material. On the one hand, the ceramic material has a better cooling effect, so that the second arc extinguishing member 400 can well cool the arc generated between the first movable contact 222 and the first fixed contact 212, and further improve the arc extinguishing effect. On the other hand, the ceramic material has a good heat insulation effect, which can prevent the heat of the arc generated between the first movable contact 222 and the first fixed contact 212 from being conducted to the shell 100. On the other hand, the second arc extinguishing member 400 can also play a role in blocking the arc to prevent the arc from ablation of the shell 100.

[0089] Of course, in other embodiments, the second arc extinguishing member 400 can also be made of other materials having cooling and / or heat insulation effects, which are not listed one by one here.

[0090] In an embodiment, along the axis of the swing axis 331, the first arc extinguishing member 320 and the second arc extinguishing member 400 are respectively located on the two sides of the first movable contact 222 and the first fixed contact 212.

[0091] In the embodiment, the arc-resistant terminal contact group 200a is provided with the first arc extinguishing member 320 and the second arc extinguishing member 400 on the two sides along the axis of the swing axis 331, and the first arc extinguishing member 320 and the second arc extinguishing member 400 can simultaneously extinguish the arc generated between the first movable contact 222 and the first fixed contact 212, and the arc extinguishing effect is better.

[0092] In an embodiment, as Figure 2As shown, the second arc extinguishing member 400 can include a second base plate 410 connected to the inner wall surface of the second housing 120 and a second protruding portion 420 protruding from a side surface of the second base plate 410 toward the first movable contact 222 and the first stationary contact 212.

[0093] As shown in FIG. 1, the first arc extinguishing member 320 can include a first base plate 330 connected to the inner wall surface of the first housing 110 and a first protruding portion 340 protruding from a side surface of the first base plate 330 toward the first movable contact 222 and the first stationary contact 212. Figure 2 and Figure 8 As shown, the second protruding portion 420 of the second arc extinguishing member 400 has a second notch 421 matching the outer peripheral shape of the first movable contact 222 and the first stationary contact 212 after being closed. The first notch 323 and the second notch 421 are oppositely arranged along the axial direction of the swing axis 331, and the first movable contact 222 and the first stationary contact 212 after being closed (i.e., the arc-resistant end contact group 200a) are located within the annular frame formed by the first notch 323 and the second notch 421.

[0094] In the embodiments of the present application, the outer periphery of the arc-resistant end contact group 200a is substantially completely surrounded by the first arc extinguishing member 320 and the second arc extinguishing member 400. When an arc is generated in the arc-resistant end contact group 200a, the first arc extinguishing member 320 and the second arc extinguishing member 400 can timely extinguish the arc, and to some extent, prevent the arc from burning the housing 100 by escaping from the annular frame surrounded by the first arc extinguishing member 320 and the second arc extinguishing member 400.

[0095] In an embodiment, the shape of the second notch 421 can be semicircular, but is not limited thereto.

[0096] As shown in FIG. 1, the first arc extinguishing member 320 can include a first base plate 330 connected to the inner wall surface of the first housing 110 and a first protruding portion 340 protruding from a side surface of the first base plate 330 toward the first movable contact 222 and the first stationary contact 212. Figure 4 and Figure 6 As shown, in an embodiment, the fixing member 310 and the housing 100 are connected in a plug-in manner. For example, the fixing portion 313 of the fixing member 310 has a plug-in portion 315, and the second housing 120 of the housing 100 has a slot 121, and the plug-in portion 315 is detachably plugged into the slot 121.

[0097] In another embodiment, the fixing portion 313 has the slot 121, and the second housing 120 has the plug-in portion 315.

[0098] In addition, in other embodiments, the fixing member 310 and the housing 100 can also be connected in a riveting, screwing, gluing, welding, interference fit, etc.

[0099] In summary, the relay of the embodiments of the present application has at least the following advantages and beneficial effects:

[0100] The relay of the embodiment of the present application, the first arc extinguishing piece 320 is installed on the fixing piece 310, not on the shell 100. Since the fixing piece 310 plays the role of installing the armature assembly 300, and is in a separate structure with the shell 100, the size precision of the fixing piece 310 can be designed to be higher, and then after the first arc extinguishing piece 320 is installed on the fixing piece 310, the position precision between the first arc extinguishing piece 320 and the first moving contact 222 and the first stationary contact 212 is also guaranteed, improving the arc extinguishing effect of the first arc extinguishing piece 320. In addition, compared with the prior art that the first arc extinguishing piece 320 is fixedly installed on the shell 100, which causes the position of the lead-out sheet to interfere with and limit the assembly of the first shell 110 and the second shell 120, the relay of the embodiment of the present application installs the first arc extinguishing piece 320 on the fixing piece 310, that is, the first arc extinguishing piece 320 is installed inside the shell 100, so that when the first shell 110 and the second shell 120 are assembled, the change in the position of the lead-out sheet can be avoided to affect the assembly of the first shell 110 and the second shell 120.

[0101] Further, the first arc extinguishing piece 320 is made of ceramic material. On the one hand, the ceramic material has a better cooling effect, so that the first arc extinguishing piece 320 has a good cooling effect on the arc generated between the first moving contact 222 and the first stationary contact 212, further improving the arc extinguishing effect; on the other hand, the ceramic material has a good heat insulation effect, which can prevent the heat of the arc generated between the first moving contact 222 and the first stationary contact 212 from being conducted to the shell 100; on the other hand, the first arc extinguishing piece can also play a role in blocking the arc to prevent the arc from ablation of the shell.

[0102] Further, the fixing piece 310 and the first arc extinguishing piece 320 are connected by one-piece injection molding, and the connection process of the fixing piece 310 and the first arc extinguishing piece 320 does not need to be baked, significantly improving the production efficiency of the product.

[0103] Further, the first protruding part 322 is protruded on the side surface of the first base plate 321 facing the first moving contact 222 and the first stationary contact 212, the distance between the first protruding part 322 and the first moving contact 222 and the first stationary contact 212 is closer, enhancing the cooling effect of the first arc extinguishing piece 320.

[0104] Further, the outer periphery of the first moving contact 222 and the first stationary contact 212 is basically completely surrounded by the first arc extinguishing piece 320 and the second arc extinguishing piece 400, when the arc is generated between the first moving contact 222 and the first stationary contact 212, the first arc extinguishing piece 320 and the second arc extinguishing piece 400 can extinguish the arc in time, and to some extent, prevent the arc from escaping from the annular frame surrounded by the first arc extinguishing piece 320 and the second arc extinguishing piece 400 and burning the shell 100.

[0105] It can be understood that each embodiment / implementation provided in the present application can be combined with each other without contradiction, which will not be repeated here.

[0106] In the embodiments of the present application, the terms "first", "second", "third" are only used for descriptive purpose, and should not 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 interpreted broadly, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through 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.

[0107] 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 to facilitate the description of the embodiments of the present application and simplify the description, and therefore, cannot be understood as indicating or implying that the device or unit 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.

[0108] In the description of the present application, the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, 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.

[0109] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A relay characterized by comprising: The relay comprises: a housing; a contact assembly disposed in the housing and comprising two contact portions, one of which has a first stationary contact and the other of which has a first movable contact; a fixed member fixedly installed in the housing and separate from the housing, the fixed member being provided with a first arc extinguishing member located around the first stationary contact and the first movable contact for extinguishing an arc generated between the first movable contact and the first stationary contact; and an armature assembly disposed in the housing and swingably connected to the fixed member for driving the contact portion provided with the first movable contact to move so as to make the first movable contact contact or separate from the first stationary contact. One of the contact portions of the contact assembly further comprises a first movable contact spring and a second movable contact, the first stationary contact and the second movable contact being both installed on the first movable contact spring, the other of the contact portions further comprising a second movable contact spring and a second stationary contact, the first movable contact and the second stationary contact being both installed on the second movable contact spring, the first movable contact spring and the second movable contact spring being arranged side by side; 2. The relay according to claim 1, characterized in that the armature assembly is configured to drive the first movable contact spring and the second movable contact spring to move respectively so as to make the first movable contact and the second movable contact correspondingly contact or separate from the first stationary contact and the second stationary contact respectively; wherein, in an off state of the contact assembly, a contact gap between the first movable contact and the first stationary contact is smaller than a contact gap between the second movable contact and the second stationary contact. The armature assembly is swingably connected to the fixed member through a swing shaft; 3. The relay of claim 1, wherein along an axial direction of the swing shaft, the first arc extinguishing member is located on one side of the first stationary contact and the first movable contact. The fixed member and the first arc extinguishing member are connected through integral injection molding.

4. A relay according to any one of claims 1-3, characterised in that The fixed member has a mounting hole penetrating through the fixed member along a thickness direction of the fixed member, the first arc extinguishing member being arranged in the mounting hole.

5. The relay according to any one of claims 1 to 3, characterized in that The fixed member has a sink groove on a side opposite to the first movable contact and the first stationary contact, the mounting hole penetrating through a groove bottom surface of the sink groove; 6. The relay of claim 5, wherein the first arc extinguishing member comprises a first base plate and a first protruding portion, the first base plate being located in the sink groove and lapping the groove bottom surface of the sink groove, the first protruding portion being arranged on a side surface of the first base plate facing the first movable contact and the first stationary contact, and being arranged in the mounting hole and inserted between the two contact portions. an end of the first protruding portion away from the first base plate has a first notch, a shape of the first notch being adapted to a peripheral shape of the first movable contact and the first stationary contact after being closed, so that the first protruding portion covers part of the peripheral of the first movable contact and the first stationary contact.

7. The relay according to claim 6, characterized in that The relay further comprises a second arc extinguishing member installed on an inner wall surface of the housing and located around the first stationary contact and the first movable contact for extinguishing an arc generated between the first movable contact and the first stationary contact.

8. The relay of claim 1, wherein ​ 9. The relay according to claim 8, characterized in that The armature assembly is swingably connected to the fixed member through a swing shaft; The first arc extinguishing member and the second arc extinguishing member are respectively located on two sides of the first stationary contact and the first movable contact along an axial direction of the swing shaft.

10. The relay of claim 9, wherein The first arc extinguishing member has a first notch matching an outer peripheral shape of the first movable contact and the first stationary contact after being closed, and the second arc extinguishing member has a second notch matching the outer peripheral shape of the first movable contact and the first stationary contact after being closed, the first notch and the second notch are oppositely arranged along the axial direction of the swing shaft, and the first movable contact and the first stationary contact after being closed are located within an annular frame formed by the first notch and the second notch.

11. The relay of claim 8, wherein The first arc extinguishing member and / or the second arc extinguishing member is made of ceramic material.

12. The relay according to any one of claims 1 to 3, characterized in that The fixed member comprises: a fixed part fixedly connected to the shell and located on a side of the other contact part away from one of the contact parts, and the armature assembly is swingably connected to the fixed part; and an extension part connected to the fixed part and located around the first movable contact and the first stationary contact, and the first arc extinguishing member is arranged on the extension part.

13. The relay according to any one of claims 1 to 3, characterized in that One of the fixed member and the shell has a plug-in part, and the other has a plug-in slot, and the plug-in part is detachably plugged into the plug-in slot.

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