Relay

Abstract

The invention 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, and in particular to a relay. Background Art

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. A relay is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] As one type of relay, a magnetic latching relay includes a housing and two sets of contact parts arranged in the housing, and the two sets of contact parts have a closed state and an open state. When the two sets of contact parts switch between the closed state and the open state, an arc is easily generated between the moving and static contacts.

[0004] In the related art, in order to enhance the arc extinguishing effect, a ceramic sheet is usually arranged near the moving and static contacts, and the ceramic sheet is installed on the inner wall of the shell. However, due to the poor dimensional accuracy of the shell, the position of the ceramic sheet installed on the shell is prone to deviation, which in turn affects the position accuracy between the ceramic sheet and the moving and static contacts, and ultimately affects the arc extinguishing effect of the ceramic sheet. Summary of the invention

[0005] The embodiment of the present application provides a relay, which solves the problem in the related art that the installation accuracy of the ceramic sheet is not high and affects the arc extinguishing effect. The relay of the embodiment of the present application includes:

[0006] shell;

[0007] A contact assembly is disposed in the housing and includes two contact parts, one of which has a first stationary contact point and the other of which has a first moving contact point;

[0008] a fixing member, fixedly mounted in the housing and having a separate structure from the housing; a first arc-extinguishing member is provided on the fixing member, and the first arc-extinguishing member is located around the first static contact and the first moving contact, and is used to extinguish an arc generated between the first moving contact and the first static contact; and

[0009] The armature assembly is arranged in the housing and is swingably connected to the fixing member, and is used to drive the contact part provided with the first movable contact to move so as to make the first movable contact contact or separate from the first stationary contact.

[0010] According to some embodiments of the present application, one of the contact parts of the contact assembly further includes a first movable spring and a second movable contact, the first static contact and the second movable contact are both mounted on the first movable spring, and the other contact part further includes a second movable spring and a second static contact, the first movable contact and the second static contact are both mounted on the second movable spring, and the first movable spring and the second movable spring are arranged side by side;

[0011] The armature assembly is configured to drive the first movable reed and the second movable reed to move respectively, so that the first movable contact and the second movable contact are in contact with or separated from the first stationary contact and the second stationary contact respectively;

[0012] Wherein, when the contact assembly is in a disconnected state, a contact gap between the first moving contact and the first stationary contact is smaller than a contact gap between the second moving contact and the second stationary contact.

[0013] According to some embodiments of the present application, the armature assembly is swingably connected to the fixing member via a swing shaft;

[0014] Along the axial direction of the swing shaft, the first arc extinguishing member is located on one side of the first static contact and the first moving contact.

[0015] According to some embodiments of the present application, the fixing member is connected to the first arc-extinguishing member by integral injection molding.

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

[0017] According to some embodiments of the present application, the fixing member has a recessed groove on a side facing away from the first moving contact and the first static contact, and the mounting hole passes through the bottom surface of the recessed groove;

[0018] The first arc-extinguishing member includes a first substrate and a first protrusion. The first substrate is located in the groove and overlaps the bottom surface of the groove. The first protrusion is arranged on a side surface of the first substrate facing the first moving contact and the first static contact, and is passed through the mounting hole and inserted between the two contact parts.

[0019] According to some embodiments of the present application, the first protrusion has a first notch at one end away from the first substrate, and the shape of the first notch is adapted to the peripheral shape of the first moving contact and the first static contact after closing, so that the first protrusion covers part of the periphery of the first moving contact and the first static contact.

[0020] According to some embodiments of the present application, the relay also includes a second arc extinguishing member, which is installed on the inner wall surface of the outer casing and is located around the first static contact and the first moving contact, and is used to extinguish the arc generated between the first moving contact and the first static contact.

[0021] According to some embodiments of the present application, the armature assembly is swingably connected to the fixing member via a swing shaft;

[0022] Along the axial direction of the swing shaft, the first arc-extinguishing member and the second arc-extinguishing member are respectively located on both sides of the first static contact and the first moving contact.

[0023] According to some embodiments of the present application, the first arc extinguishing member has a first notch that is adapted to the peripheral shape of the first moving contact and the first static contact after they are closed, and the second arc extinguishing member has a second notch that is adapted to the peripheral shape of the first moving contact and the first static contact after they are closed, the first notch and the second notch are arranged opposite to each other along the axial direction of the swing shaft, and the first moving contact and the first static contact are located in an annular frame surrounded by the first notch and the second notch after they are closed.

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

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

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

[0027] The extension part is connected to the fixed part and is located around the first moving contact and the first static contact. The first arc extinguishing member is mounted on the extension part.

[0028] According to some embodiments of the present application, one of the fixing member and the housing has an inserting portion, and the other has a slot, and the inserting portion can be detachably inserted into the slot.

[0029] One embodiment of the above application has at least the following advantages or beneficial effects:

[0030] In the relay of the embodiment of the present application, the first arc extinguishing member is installed on the fixing member instead of on the outer casing. Since the fixing member plays the role of installing the armature assembly and is a separate structure from the outer casing, the dimensional accuracy of the fixing member can be designed to be higher. Furthermore, after the first arc extinguishing member is installed on the fixing member, the position accuracy between the first arc extinguishing member and the first moving contact and the first static contact is also guaranteed, thereby improving the arc extinguishing effect of the first arc extinguishing member.

[0031] Furthermore, the first arc extinguishing member is made of ceramic material. On the one hand, the ceramic material has a good cooling effect, so that the first arc extinguishing member plays a good cooling role on the arc generated between the first moving contact and the first static contact, 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 and the first static contact from being transferred to the shell; on the other hand, the first arc extinguishing member can also play an arc blocking role to prevent the arc from burning the shell.

[0032] Furthermore, the fixing member and the first arc-extinguishing member are connected by integral injection molding, and the connection process between the fixing member and the first arc-extinguishing member does not require baking, which significantly improves the production efficiency of the product.

[0033] Furthermore, the first protrusion is protruding from a side surface of the first substrate facing the first moving contact and the first static contact, and the distance between the first protrusion and the first moving contact and the first static contact is closer, thereby enhancing the cooling effect of the first arc extinguishing member.

[0034] Furthermore, the outer periphery of the first moving contact and the first static contact is basically completely surrounded by the first arc extinguishing member and the second arc extinguishing member. When an arc is generated between the first moving contact and the first static contact, the first arc extinguishing member and the second arc extinguishing member can extinguish the arc in time and to a certain extent prevent the arc from escaping from the annular frame formed by the first arc extinguishing member and the second arc extinguishing member and burning the outer casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Shown is a three-dimensional schematic diagram of a relay according to an embodiment of the present application.

[0036] Figure 2 Shown is a schematic diagram of an exploded view of a relay according to an embodiment of the present application.

[0037] Figure 3 What is shown is a schematic diagram of the relay of the embodiment of the present application with the first housing omitted.

[0038] Figure 4 It is shown that Figure 3 Schematic diagram after omitting the fixing member and the first arc extinguishing member.

[0039] Figure 5 Shown is a three-dimensional schematic diagram of the fixing member and the first arc-extinguishing member after being assembled.

[0040] Figure 6 Shown is a schematic perspective view of a fixing element.

[0041] Figure 7 Shown is a three-dimensional schematic diagram of the first arc-extinguishing member.

[0042] Figure 8 Shown is a schematic diagram of the positional relationship between the first notch of the first protruding portion, the second notch of the second protruding portion, and the arc-proof end contact group.

[0043] The reference numerals are described as follows:

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

[0045] 200, contact assembly; 200a, arc-proof end contact group; 200b, current-carrying end contact group; 210, first contact portion; 211, first moving spring; 212, first static contact; 213, second moving contact; 220, second contact portion; 221, second moving spring; 222, first moving contact; 223, second static contact;

[0046] 300, armature assembly; 310, fixing member; 311, mounting hole; 312, sink; 313, fixing portion; 314, extension portion; 315, plug-in portion; 320, first arc-extinguishing member; 321, first substrate; 322, first protrusion; 323, first notch; 331, swing shaft;

[0047] 400, second arc extinguishing member; 410, second substrate; 420, second protruding portion; 421, second notch;

[0048] 500, coil assembly;

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

[0050] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0051] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or components that are inherent to these processes, methods, products, or devices.

[0052] The present application embodiment provides a relay, which may be a magnetic latching relay, but is not limited thereto. Figure 1 and Figure 2 As shown, the relay includes a housing 100, a contact assembly 200, an armature assembly 300 and a coil assembly 500. The contact assembly 200 is arranged in the housing 100 and has a closed state and an open state. The armature assembly 300 is arranged in the housing 100 and is used 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 arranged in the housing 100 and is electromagnetically coupled with the armature assembly 300.

[0053] In one embodiment, if Figure 2 As shown, the housing 100 may include a first shell 110 and a second shell 120, which are connected together to form a hollow chamber for accommodating the contact assembly 200, the armature assembly 300 and the coil assembly 500. The shape of the first shell 110 and the second shell 120 after being connected can have various embodiments. For example, in the embodiment of the present application, the shape of the first shell 110 and the second shell 120 after being connected is a hollow cuboid. Of course, in other embodiments, the shape of the first shell 110 and the second shell 120 after being connected can also be a hollow cylinder, or other suitable shapes.

[0054] As an example, the second housing 120 is in the shape of a rectangular parallelepiped with an opening, and the contact assembly 200, the armature assembly 300 and the coil assembly 500 are installed in the second housing 120 through the opening of the second housing 120. The first housing 110 is in the shape of a plate, and the first housing 110 is buckled in the opening of the second housing 120 to form a hollow rectangular parallelepiped.

[0055] Of course, in other embodiments, the first shell 110 and the second shell 120 are both in the shape of a rectangular parallelepiped and have an opening on one surface. The opening of the first shell 110 is arranged opposite to the opening of the second shell 120, and the first shell 110 and the second shell 120 are snapped together to form a hollow chamber for accommodating the contact assembly 200, the armature assembly 300 and the coil assembly 500.

[0056] like 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 portion. For ease of description, 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 movable spring piece 211, a first static contact 212, and a second movable contact 213, and the first static contact 212 and the second movable contact 213 are respectively mounted at both ends of the length direction of the first movable spring piece 211. As an example, the first static contact 212 and the second movable contact 213 can be mounted on the first movable spring piece 211 by riveting, but the present invention is not limited thereto.

[0058] The second contact portion 220 includes a second movable spring piece 221, a first movable contact 222, and a second static contact 223. The first movable contact 222 and the second static contact 223 are respectively mounted at both ends of the length direction of the second movable spring piece 221. As an example, the first movable contact 222 and the second static contact 223 can be mounted on the second movable spring piece 221 by riveting, but the present invention is not limited thereto.

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

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

[0061] like Figure 2 and Figure 4 As shown, 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. The first lead-out piece 601 and the second lead-out piece 602 are respectively used to electrically connect to the positive electrode and the negative electrode of the 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 movable spring piece 211 and the first static contact 212 , and the second lead-out piece 602 is riveted to the second movable spring piece 221 and the second static contact 223 .

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

[0064] like Figure 2 , Figure 3 and Figure 5 As shown, the relay further includes a fixing member 310, which is fixedly installed in the housing 100. The fixing member 310 and the housing 100 are separate structures. A first arc extinguishing member 320 is provided on the fixing member 310, and the first arc extinguishing member 320 is located around the first static contact 212 and the first moving contact 222, and is used to extinguish the arc generated between the first moving contact 222 and the first static 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 swingably connected to the fixing member 310, and is used to drive the first movable spring piece 211 and the second movable spring piece 221 to move respectively, so that the first movable contact 222 and the second movable contact 213 are respectively in contact with or separated from the first static contact 212 and the second static contact 223. The coil assembly 500 is configured to drive the armature assembly 300 to swing relative to the fixing member 310 in response to an input signal.

[0066] In 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 housing 100. Since the fixing member 310 plays the role of installing the armature assembly 300 and is a separate structure from the housing 100, the dimensional accuracy of the fixing member 310 can be designed to be higher. Furthermore, after the first arc extinguishing member 320 is installed on the fixing member 310, the position accuracy between the first arc extinguishing member 320 and the first moving contact 222 and the first static contact 212 is also guaranteed, thereby improving the arc extinguishing effect of the first arc extinguishing member 320. In addition, compared with the prior art in which the first arc extinguishing member 320 is fixedly installed on the housing 100, which causes the position of the lead-out piece to interfere with and restrict the assembly of the first shell 110 and the second shell 120, the relay in the embodiment of the present application installs the first arc extinguishing member 320 on the fixing member 310, that is, the first arc extinguishing member 320 is installed inside the housing 100. In this way, when assembling the first shell 110 and the second shell 120, it is possible to avoid affecting the assembly of the first shell 110 and the second shell 120 due to changes in the position of the lead-out piece.

[0067] like Figure 1 and Figure 2 As shown, the armature assembly 300 is rotated by the swing shaft 331 ( Figure 1 ) is swingably connected to the fixing member 310. Along the axial direction of the swing shaft 331, the first arc extinguishing member 320 is located on one side of the first static contact 212 and the first moving contact 222.

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

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

[0070] Since the contact gap of the arc-proof 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 disconnected state, the current-carrying end contact group 200b will be disconnected before the arc-proof end contact group 200a when the contact assembly 200 is switched from the closed state to the disconnected state, and when the current-carrying end contact group 200b is just disconnected, the arc-proof end contact group 200a has not been completely disconnected. Therefore, the current-carrying end contact group 200b plays a current-carrying role, while the arc-proof end contact group 200a plays an arc-proof role. In other words, the arc-proof 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 only arranged around the first moving contact 222 and the first static contact 212 (i.e., the arc-proof end contact group 200a) that can generate an arc, while the first arc extinguishing member 320 is not arranged around the second moving contact 213 and the second static contact 223 (i.e., the current-carrying end contact group 200b) that will not generate an arc. This achieves "targeted" effect, and the first arc extinguishing member 320 is not arranged around both the arc-proof end contact group 200a and the current-carrying end contact group 200b, thereby saving material costs.

[0072] It is understandable that the different contact gap designs between the arc-proof end contact group 200a and the current-carrying end contact group 200b can be achieved by lowering the contact height, but the present invention is not limited thereto.

[0073] In one embodiment, the first arc extinguishing member 320 is made of a ceramic material. On the one hand, the ceramic material has a good cooling effect, so that the first arc extinguishing member 320 plays a good cooling role on the arc generated between the first moving contact 222 and the first static 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 static contact 212 from being transferred to the housing 100; on the other hand, the first arc extinguishing member 320 can also play an arc blocking role to prevent the arc from burning the housing 100.

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

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

[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 shell 110 by using a dispensing method. The dispensing method requires a subsequent baking process in an oven, which results in a long 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 integral injection molding, and the connection process between 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 may also be connected by means of clamping, riveting, welding, etc., which are not listed one by one here.

[0079] like Figure 5 and Figure 6The fixing member 310 includes a fixing portion 313 and an extending portion 314. The fixing portion 313 is fixedly connected to the second housing 120 and is located on the side of the second contact portion 220 facing away from the first contact portion 210. The armature assembly 300 is swingably connected to the fixing portion 313. The extending portion 314 is connected to the fixing portion 313 and is located around the first moving contact 222 and the first static contact 212. The first arc extinguishing member 320 is mounted on the extending portion 314.

[0080] The extension portion 314 has a mounting hole 311 , and the mounting hole 311 penetrates the extension portion 314 along the thickness direction of the fixing member 310 . The first arc-extinguishing member 320 is disposed in the mounting hole 311 .

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

[0082] In the embodiment of the present application, the first protrusion 322 is protruded from the side surface of the first substrate 321 facing the first moving contact 222 and the first static contact 212, and the distance between the first protrusion 322 and the first moving contact 222 and the first static contact 212 is closer, thereby enhancing the cooling effect of the first arc extinguishing member 320.

[0083] It should also be noted that the extension portion 314 is provided with a groove 312, and the first substrate 321 of the first arc extinguishing component 320 is overlapped on the bottom surface of the groove 312, so that when installing the first arc extinguishing component 320, the fixing component 310 is first connected to the second shell 120, and then the first arc extinguishing component 320 is directly overlapped on the bottom surface of the groove 312, and the first shell 110 is connected to the second shell 120 without the need for other additional auxiliary connection processes, which not only realizes the limiting and anti-detachment of the first arc extinguishing component 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, and the shape of the first notch 323 is adapted to the peripheral shape of the first moving contact 222 and the first static contact 212 after closing, so that the first protrusion 322 covers part of the periphery of the first moving contact 222 and the first static contact 212.

[0085] In the embodiment of the present application, the shape of the first notch 323 is adapted to the peripheral shape of the first moving contact 222 and the first static contact 212 after closing, so that the first protrusion 322 can cover part of the periphery of the first moving contact 222 and the first static contact 212. In this way, the first protrusion 322 covers a larger area of ​​the first moving contact 222 and the first static contact 212, further enhancing the cooling effect of the first arc extinguishing member 320.

[0086] In one embodiment, the shape of the first notch 323 may be semicircular, but is not limited thereto.

[0087] Please return to Figure 2 The relay further includes a second arc extinguishing member 400, which is mounted on the inner wall of the housing 100 and is located around the first static contact 212 and the first moving contact 222, and is used to extinguish the arc generated between the first moving contact 222 and the first static contact 212. In the embodiment of the present application, the second arc extinguishing member 400 is mounted on the inner wall of the second housing 120.

[0088] In one embodiment, the second arc extinguishing member 400 is made of a ceramic material. On the one hand, the ceramic material has a good cooling effect, so that the second arc extinguishing member 400 has a good cooling effect on the arc generated between the first moving contact 222 and the first static 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 static contact 212 from being transferred to the housing 100; on the other hand, the second arc extinguishing member 400 can also play an arc blocking role to prevent the arc from burning the housing 100.

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

[0090] In one embodiment, along the axial direction of the swing shaft 331 , the first arc extinguishing member 320 and the second arc extinguishing member 400 are respectively located on both sides of the first static contact 212 and the first movable contact 222 .

[0091] In the embodiment of the present application, the arc-proof end contact group 200a is respectively provided with a first arc extinguishing member 320 and a second arc extinguishing member 400 on both sides of the axial direction of the swing shaft 331. The first arc extinguishing member 320 and the second arc extinguishing member 400 can simultaneously extinguish the arc generated between the first moving contact 222 and the first static contact 212, and the arc extinguishing effect is better.

[0092] In one embodiment, if Figure 2As shown, the second arc extinguishing member 400 may include a second substrate 410 and a second protrusion 420, the second substrate 410 is connected to the inner wall surface of the second shell 120, the second protrusion 420 is protruded on the side surface of the second substrate 410 facing the first moving contact 222 and the first static contact 212, and is inserted between the first moving reed piece 211 and the second moving reed piece 221.

[0093] like Figure 2 and Figure 8 As shown, the second protrusion 420 of the second arc extinguishing member 400 has a second notch 421 that matches the outer peripheral shape of the first moving contact 222 and the first static contact 212 after closing. The first notch 323 and the second notch 421 are arranged opposite to each other along the axial direction of the swing shaft 331, and the first moving contact 222 and the first static contact 212 are located in the annular frame surrounded by the first notch 323 and the second notch 421 after closing (i.e., the arc-proof end contact group 200a).

[0094] In the embodiment of the present application, the outer periphery of the arc-proof end contact group 200a is basically completely surrounded by the first arc-extinguishing member 320 and the second arc-extinguishing member 400. When an arc is generated in the arc-proof end contact group 200a, the first arc-extinguishing member 320 and the second arc-extinguishing member 400 can extinguish the arc in time, and to a certain extent can prevent the arc from escaping from the annular frame formed by the first arc-extinguishing member 320 and the second arc-extinguishing member 400 and burning the outer casing 100.

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

[0096] like Figure 4 and Figure 6 As shown, in one embodiment, the fixing member 310 is connected to the housing 100 by plugging. For example, the fixing portion 313 of the fixing member 310 has a plugging portion 315, and the second shell 120 of the housing 100 has a slot 121, and the plugging portion 315 is detachably plugged into the slot 121.

[0097] In another embodiment, the fixing portion 313 has a slot 121 , and the second housing 120 has an inserting portion 315 .

[0098] In addition, in other embodiments, the fixing member 310 and the housing 100 may also be connected by riveting, screws, adhesive bonding, welding, interference fit, etc.

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

[0100] In 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 housing 100. Since the fixing member 310 plays the role of installing the armature assembly 300 and is a separate structure from the housing 100, the dimensional accuracy of the fixing member 310 can be designed to be higher. Furthermore, after the first arc extinguishing member 320 is installed on the fixing member 310, the position accuracy between the first arc extinguishing member 320 and the first moving contact 222 and the first static contact 212 is also guaranteed, thereby improving the arc extinguishing effect of the first arc extinguishing member 320. In addition, compared with the prior art in which the first arc extinguishing member 320 is fixedly installed on the housing 100, which causes the position of the lead-out piece to interfere with and restrict the assembly of the first shell 110 and the second shell 120, the relay in the embodiment of the present application installs the first arc extinguishing member 320 on the fixing member 310, that is, the first arc extinguishing member 320 is installed inside the housing 100. In this way, when assembling the first shell 110 and the second shell 120, it is possible to avoid affecting the assembly of the first shell 110 and the second shell 120 due to changes in the position of the lead-out piece.

[0101] Furthermore, the first arc extinguishing member 320 is made of a ceramic material. On the one hand, the ceramic material has a good cooling effect, so that the first arc extinguishing member 320 plays a good cooling role on the arc generated between the first moving contact 222 and the first static 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 static contact 212 from being transferred to the housing 100; on the other hand, the first arc extinguishing member can also play an arc blocking role to prevent the arc from burning the housing.

[0102] Furthermore, the fixing member 310 and the first arc-extinguishing member 320 are connected by integral injection molding, and the connection process between the fixing member 310 and the first arc-extinguishing member 320 does not require baking, which significantly improves the production efficiency of the product.

[0103] Furthermore, the first protrusion 322 is protruding from the side surface of the first substrate 321 facing the first moving contact 222 and the first static contact 212 , and the distance between the first protrusion 322 and the first moving contact 222 and the first static contact 212 is closer, thereby enhancing the cooling effect of the first arc extinguishing member 320 .

[0104] Furthermore, the outer periphery of the first moving contact 222 and the first static contact 212 is basically completely surrounded by the first arc extinguishing member 320 and the second arc extinguishing member 400. When an arc is generated between the first moving contact 222 and the first static contact 212, the first arc extinguishing member 320 and the second arc extinguishing member 400 can extinguish the arc in time and prevent the arc from escaping from the annular frame formed by the first arc extinguishing member 320 and the second arc extinguishing member 400 and burning the outer casing 100 to a certain extent.

[0105] It is understandable that the various embodiments / implementations provided in the present application can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0106] In the application embodiments, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the application embodiments can be understood according to the specific circumstances.

[0107] In the description of the application embodiments, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the application embodiments.

[0108] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. 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 application embodiment. In this specification, the schematic representation 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 are only preferred embodiments of the application embodiments and are not intended to limit the application embodiments. For those skilled in the art, the application embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application embodiments shall be included in the protection scope of the application embodiments.

Claims

1. A relay, characterized in that: include: shell; A contact assembly is disposed in the housing and includes two contact parts, one of which has a first stationary contact point and the other of which has a first moving contact point; a fixing member, fixedly installed in the housing and having a separate structure from the housing; a first arc-extinguishing member is provided on the fixing member, and the first arc-extinguishing member is located around the first static contact and the first moving contact, and is used to extinguish an arc generated between the first moving contact and the first static contact; as well as The armature assembly is arranged in the housing and is swingably connected to the fixing member, and is used to drive the contact part provided with the first movable contact to move so as to make the first movable contact contact or separate from the first stationary contact.

2. The relay according to claim 1, characterized in that: One of the contact parts of the contact assembly further includes a first movable spring and a second movable contact, the first stationary contact and the second movable contact are both mounted on the first movable spring, and the other contact part further includes a second movable spring and a second stationary contact, the first movable contact and the second stationary contact are both mounted on the second movable spring, and the first movable spring and the second movable spring are arranged side by side; The armature assembly is configured to drive the first movable reed and the second movable reed to move respectively, so that the first movable contact and the second movable contact are in contact with or separated from the first stationary contact and the second stationary contact respectively; Wherein, when the contact assembly is in a disconnected state, a contact gap between the first moving contact and the first stationary contact is smaller than a contact gap between the second moving contact and the second stationary contact.

3. The relay according to claim 1, characterized in that: The armature assembly is swingably connected to the fixing member via a swing shaft; Along the axial direction of the swing shaft, the first arc extinguishing member is located on one side of the first static contact and the first moving contact.

4. The relay according to any one of claims 1 to 3, characterized in that: The fixing member is connected to the first arc-extinguishing member by integral injection molding.

5. The relay according to any one of claims 1 to 3, characterized in that: The fixing member has a mounting hole, the mounting hole penetrates the fixing member along the thickness direction of the fixing member, and the first arc-extinguishing member is penetrated through the mounting hole.

6. The relay according to claim 5, characterized in that: The fixing member has a recessed groove on one side facing away from the first moving contact and the first stationary contact, and the mounting hole passes through the bottom surface of the recessed groove; The first arc-extinguishing member includes a first substrate and a first protrusion. The first substrate is located in the groove and overlaps the bottom surface of the groove. The first protrusion is arranged on a side surface of the first substrate facing the first moving contact and the first static contact, and is passed through the mounting hole and inserted between the two contact parts.

7. The relay according to claim 6, characterized in that: The first protrusion has a first notch at one end away from the first substrate, and the shape of the first notch matches the peripheral shape of the first moving contact and the first static contact after closing, so that the first protrusion covers part of the periphery of the first moving contact and the first static contact.

8. The relay according to claim 1, characterized in that: The relay further includes a second arc extinguishing member, which is mounted on the inner wall surface of the housing and is located around the first static contact and the first moving contact, and is used to extinguish an arc generated between the first moving contact and the first static contact.

9. The relay according to claim 8, characterized in that: The armature assembly is swingably connected to the fixing member via a swing shaft; Along the axial direction of the swing shaft, the first arc-extinguishing member and the second arc-extinguishing member are respectively located on both sides of the first static contact and the first moving contact.

10. The relay according to claim 9, characterized in that: The first arc extinguishing member has a first notch adapted to the peripheral shape of the first moving contact and the first static contact after they are closed, and the second arc extinguishing member has a second notch adapted to the peripheral shape of the first moving contact and the first static contact after they are closed, the first notch and the second notch are arranged opposite to each other along the axial direction of the swing shaft, and the first moving contact and the first static contact are located in an annular frame surrounded by the first notch and the second notch after they are closed.

11. The relay according to claim 8, characterized in that: The first arc-extinguishing member and / or the second arc-extinguishing member are made of ceramic material.

12. The relay according to any one of claims 1 to 3, characterized in that: The fixing member comprises: a fixed portion, fixedly connected to the housing and located on a side of the other contact portion facing away from one of the contact portions, the armature assembly being swingably connected to the fixed portion; and The extension part is connected to the fixed part and is located around the first moving contact and the first static contact. The first arc extinguishing member is mounted on the extension part.

13. The relay according to any one of claims 1 to 3, characterized in that: One of the fixing member and the housing has an inserting portion, and the other has a slot, and the inserting portion is detachably inserted into the slot.

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