Relay

Abstract

The invention relates to a relay. The relay comprises a moving part and a movable contact assembly. The moving part can move and is provided with a mounting hole; the movable contact assembly is installed on the moving part through the locking part, the locking part comprises a gland and a plurality of elastic arms, the gland is located outside the moving part and abuts against the moving part, the elastic arms are arranged in the installation holes in a penetrating mode and can tightly hold the moving part by means of resilience force of the elastic arms for locking, and therefore the gland can press the movable contact assembly on the moving part. According to the relay, the movable contact assembly is installed on the movable piece in a pressing mode of the locking piece, and the elastic arm of the locking piece has certain elasticity, so that the elastic arm can be smoothly installed in the installation hole of the movable piece after being extruded and deformed, and finally the movable piece is tightly held by relying on resilience force to be locked. Therefore, the movable contact assembly can be pressed on the moving part by the gland, and pollution to the static contact and the movable contact due to generation of plastic chips in the assembly process of the movable contact assembly can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relays, and particularly relates to a relay. BACKGROUND

[0002] A relay is an automatic switch element with an isolation function, which is widely used in remote control, remote measurement, communication, automatic control, mechatronics and power electronic equipment, and is one of the most important control elements. Plastic chips are one of the main pollutants causing poor contact of relay contacts. Most relays use interference fit to insert and fasten the moving spring piece on the moving piece, and plastic chips are inevitably generated due to friction during this process. Although some plastic chips can be removed through blowing, brushing and suction processes, they cannot be completely eliminated. The residual plastic chips may migrate to the contact surface through internal movement of the equipment, pollute the contact, and thus cause the risk of unreliable contact. SUMMARY

[0003] Therefore, it is necessary to provide a relay aiming at the above technical problems.

[0004] A relay comprises:

[0005] a moving piece capable of moving and having a mounting hole; and

[0006] a moving contact assembly installed on the moving piece through a locking piece, wherein the locking piece comprises a gland and a plurality of elastic arms, the gland is located outside the moving piece and abuts against the moving piece, the elastic arms are arranged in the mounting hole and can be locked by the elastic force of the elastic arms to tightly hold the moving piece, so that the gland can press the moving contact assembly on the moving piece.

[0007] In one embodiment, the two elastic arms are inclined in the direction of approaching or moving away from each other, so that the two elastic arms can rebound in the direction of approaching or moving away from each other.

[0008] In one embodiment, the rebound direction of the elastic arm is parallel or perpendicular to the length direction of the moving piece.

[0009] In one embodiment, when the two elastic arms rebound in the direction of approaching each other, the mounting hole is provided with two mounting holes corresponding to the two elastic arms.

[0010] When the two elastic arms rebound in the direction of moving away from each other, the mounting hole is provided with one mounting hole or two mounting holes corresponding to the two elastic arms.

[0011] In one embodiment, the end of the elastic arm away from the gland is provided with a clamping jaw, the clamping jaw extends in the rebound direction of the elastic arm and abuts against the outer wall of the moving piece.

[0012] In one of the embodiments, the side of the grommet facing the moving piece is provided with a first limiting part, the side of the moving piece facing the grommet is provided with a second limiting part, and the first limiting part cooperates with the second limiting part to limit the grommet in a direction perpendicular to the rebound direction of the elastic arm;

[0013] In one of the embodiments, one of the first limiting part and the second limiting part is a groove, and the other is a protrusion inserted into the groove.

[0014] In one of the embodiments, the elastic arm is aligned with the first limiting part in the rebound direction of the elastic arm, or the elastic arm extends from the second limiting part towards the direction away from the grommet.

[0015] In one of the embodiments, the movable contact assembly is provided as a plurality of movable contact assemblies, and the plurality of movable contact assemblies are arranged at intervals along the length direction of the moving piece.

[0016] The locking piece is provided as at least one, and each of the locking pieces is arranged between the corresponding adjacent two movable contact assemblies and presses the corresponding adjacent two movable contact assemblies on the moving piece.

[0017] In one of the embodiments, the movable contact assembly comprises a movable spring sheet and a receiving piece connected with each other, and the side of the movable spring sheet opposite to the receiving piece is provided with a movable contact point.

[0018] The moving piece has an insertion cavity comprising a through hole part and a groove part in communication, the through hole part is used for the movable spring sheet to pass through, and the grommet is used to press the receiving piece in the groove part from the slot of the groove part.

[0019] In one of the embodiments, the movable contact assembly further comprises a pressing spring sheet and at least two shafts.

[0020] The shafts are protruded on the receiving piece, and the movable spring sheet is arranged on the shafts and can move along the axial direction of the shafts.

[0021] The pressing spring sheet is connected between the movable spring sheet and the pressing spring sheet, and can provide an acting force to the movable spring sheet moving away from the receiving piece.

[0022] In one of the embodiments, the shaft comprises a first shaft segment, a second shaft segment and a limiting shaft end connected in sequence, and the diameter of the first shaft segment and the diameter of the second shaft segment are different.

[0023] The first shaft section is movably arranged in the compression spring, and the first shaft section is fixedly connected with the bearing member; the second shaft section is movably arranged in the moving spring; the limiting shaft end is in limiting contact with the moving spring on the side of the moving spring away from the compression spring.

[0024] In one of the embodiments, the free end of the first shaft section extends out of the bearing member.

[0025] The groove wall of the recessed portion facing the through hole portion has at least two accommodating grooves for accommodating the free ends of the corresponding mandrels.

[0026] In one of the embodiments, a stop portion is arranged in the insertion cavity, and the stop portion is located at the junction between the through hole portion and the recessed portion and is in abutment with the bearing member.

[0027] In one of the embodiments, the relay further comprises a base and a cover plate.

[0028] A partition portion is arranged in the base, and the partition portion is used to separate the inner cavity of the base into a magnetic circuit type cavity and a contact type cavity; the moving member is movably arranged in the contact type cavity; and the cover plate is arranged at the bottom of the base to close the contact type cavity.

[0029] The side of the partition portion facing the moving member and / or the side of the cover plate facing the moving member is provided with a limiting track, and the moving member is slidably assembled along the limiting track.

[0030] In one of the embodiments, the mounting hole is arranged in a direction perpendicular to the direction from the magnetic circuit type cavity to the contact type cavity.

[0031] Compared with the mounting mode of the dynamic contact assembly in the traditional relay that uses interference fit, the locking member is used to press and fit the dynamic contact assembly on the moving member in the relay, wherein the elastic arm of the locking member has a certain elasticity, so that the elastic arm can be smoothly fitted into the mounting hole of the moving member after extrusion deformation, and finally locked by relying on the elastic force of the elastic arm to tightly hold the moving member, so that the compression cover can press and fit the dynamic contact assembly on the moving member, without the need to apply a large installation force to the dynamic contact assembly to realize the interference fit with the moving member, which can effectively avoid the pollution of the static and dynamic contacts due to the generation of plastic chips during assembly, improve the reliability of the contact between the static and dynamic contacts, and effectively fasten and limit the dynamic contact assembly. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The structure of the moving member and the dynamic contact assembly of the relay provided in Embodiment 1 of the present application is shown from a first angle.

[0033] Figure 2Fig. 4 is a schematic view of the moving element and the movable contact assembly of the relay of embodiment 1 of the present application from a second angle.

[0034] Figure 3 Fig. 5 is a schematic view of the moving element and the movable contact assembly of the relay of embodiment 1 of the present application from a third angle.

[0035] Figure 4 Fig. 6 is a sectional view of the moving element and the movable contact assembly at A-A. Figure 3

[0036] Figure 5 Fig. 7 is a schematic view of the moving element of embodiment 1 of the present application from a first angle.

[0037] Figure 6 Fig. 8 is a schematic view of the moving element of embodiment 1 of the present application from a second angle.

[0038] Figure 7 Fig. 9 is a schematic view of the locking element of embodiment 1 of the present application from a first angle.

[0039] Figure 8 Fig. 10 is a schematic view of the locking element of embodiment 1 of the present application from a second angle.

[0040] Figure 9 Fig. 11 is a sectional view of the relay of embodiment 1 of the present application.

[0041] Figure 10 Fig. 12 is a schematic view of the distribution of the four elastic arms on the cover of another embodiment of the present application.

[0042] Figure 11 Fig. 13 is a sectional view of the moving element and the movable contact assembly at B. Figure 1

[0043] Figure 12 Fig. 14 is a schematic view of the movable contact assembly of embodiment 1 of the present application.

[0044] Figure 13 Fig. 15 is a schematic view of the compression spring sheet of the movable contact assembly of embodiment 1 of the present application.

[0045] Figure 14 Fig. 16 is a schematic view of the mandrel of the movable contact assembly of embodiment 1 of the present application.

[0046] Figure 15 Fig. 17 is a schematic view of the cover plate of embodiment 1 of the present application.

[0047] Figure 16 Fig. 18 is a schematic view of the locking element of the relay of embodiment 2 of the present application.

[0048] ​​In the drawings, the reference signs are explained as follows:

[0049] 10, relay; 100, moving part; 110, mounting hole; 120, second limiting part; 130, plug-in cavity; 131, through hole part; 132, groove part; 133, stop part; 140, accommodating groove; 150, limiting protrusion; 200, moving contact assembly; 210, moving spring sheet; 211, moving contact; 220, receiving part; 230, mandrel; 231, first shaft section; 232, second shaft section; 233, limiting shaft end; 240, compression spring sheet; 241, compression spring center part; 241a, compression spring shaft hole; 242, compression spring outer extension part; 243, bent abutment part; 300, locking part; 310, gland; 311, first limiting part; 320, elastic arm; 330, claw; 400, magnetic circuit structure; 410, yoke; 420, magnetic assembly; 421, permanent magnet; 422, magnetic conductor; 430, coil assembly; 500, driving part; 600, base; 610, partition; 600a, magnetic circuit type cavity; 600b, contact type cavity; 700, cover plate; 710, limiting rail. DETAILED DESCRIPTION

[0050] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated to cover all such modifications as fall within the scope of the application. It is to be understood that the specific embodiments of the present application are shown by way of illustration and not as limitations.

[0051] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0052] In addition, the terms "first", "second", and the like, if any, are used herein for descriptive purposes only and should not be construed as indicating or implying relative importance or identifying the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0053] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] In the present application, unless otherwise explicitly specified and limited, if the first feature is described as "on" or "under" the second feature, etc., it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0055] It should be noted that if an element is referred to as "fixed to" or "disposed to" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0056] Example 1

[0057] This embodiment provides a relay 10, as shown in Figures 1 to 4 The relay 10 includes a moving piece 100 and a movable contact assembly 200; the moving piece 100 can move and has a mounting hole 110 (see Figure 5 and Figure 6) ; the moving contact assembly 200 is mounted on the moving part 100 by the locking part 300, wherein, as shown in Figure 7 and Figure 8 the locking part 300 includes a cover 310 and a plurality of elastic arms 320, the cover 310 is located outside the moving part 100 and abuts against the moving part 100, the elastic arms 320 pass through the mounting hole 110 and can be locked by the elastic force of the elastic arms 320 to tightly hold the moving part 100, so that the cover 310 can press the moving contact assembly 200 on the moving part 100.

[0058] The relay 10 can be an electromagnetic relay, a motor relay, a magnetic latching relay, etc.

[0059] As an example, as shown in Figure 9 the relay 10 can be a magnetic latching relay, and can further include a base 600, a cover plate 700, a magnetic circuit structure 400, a driving part 500, and a static contact assembly.

[0060] The base 600 is provided with a partition 610 for separating the inner cavity of the base 600 into a magnetic circuit cavity 600a and a contact cavity 600b, and the cover plate 700 is arranged at the bottom of the base 600 to close the contact cavity 600b.

[0061] The magnetic circuit structure 400 is arranged in the magnetic circuit cavity 600a and can include a yoke 410, a magnetic assembly 420, and a coil assembly 430; the magnetic assembly 420 is arranged in a magnetic circuit space surrounded by the yoke 410 and includes two opposite permanent magnets 421 and a movable magnetic conductor 422; the coil assembly 430 is fixedly arranged relative to the yoke 410 and surrounds the outer periphery of the magnetic assembly 420; the coil assembly 430 is configured to drive the magnetic conductor 422 to move between the two permanent magnets 421 in response to an input signal. Optionally, the permanent magnet 421 is a magnetic steel; the magnetic conductor 422 is an iron core.

[0062] The moving part 100 is movably arranged in the contact cavity 100b and is connected to the magnetic conductor 422 through the driving part 500. The static contact assembly and the moving contact assembly 200 constitute a contact system of the relay 10, and both are arranged in the contact cavity 100b. The moving part 100 can drive the contact system to switch between a closed state and an open state.

[0063] Such a relay 10 has a double-drive magnetic circuit structure, which can realize fast switching of the contacts of the relay 10, so that the relay 10 can be applied to AI servers and other electrical appliances that require high computing power.

[0064] Compared with the installation mode of interference fit of the moving contact assembly in the conventional relay, the embodiment adopts the mode of compression of the locking member 300 to install the moving contact assembly 200 on the moving member 100, wherein the elastic arm 320 of the locking member 300 has a certain elasticity, so that the elastic arm 320 can be smoothly installed into the installation hole 110 of the moving member 100 after extrusion deformation, and finally locked by relying on the elastic force of itself to tightly hold the moving member 100, so that the gland 310 can compress the moving contact assembly 200 on the moving member 100, which does not need to apply a large installation force to the moving contact assembly 200 to realize the interference fit with the moving member 100, can effectively avoid the pollution of the static and dynamic contacts due to the generation of plastic chips during the assembly process of the moving contact assembly 200, improve the reliability of the contact between the static and dynamic contacts, and effectively fasten and position the moving contact assembly 200.

[0065] As shown in Figure 7 and Figure 8 In this embodiment, the elastic arm 320 is provided with two elastic arms 320, and the two elastic arms 320 are inclined in the direction of approaching each other, so that the two elastic arms 320 can rebound in the direction of approaching each other. The inclined arrangement of the elastic arm 320 facilitates the rebound of the elastic arm 320, and can effectively hold the moving member 100. Figure 7 The arrow in the figure represents the rebound direction of the elastic arm 320.

[0066] Of course, in other embodiments, the number of elastic arms 320 can also be greater than two, and all the elastic arms 320 are arranged around the central axis of the locking cover 310, and all the elastic arms 320 rebound towards the central axis of the locking cover 310. Among them, Figure 10 The distribution diagram of four elastic arms 320 on the locking cover 310 is shown.

[0067] Regarding the inclination angle of the elastic arm 320, that is, the angle between the elastic arm 320 and the central axis of the locking member 300, the embodiment does not make specific limitation, as long as the elastic arm 320 can be smoothly inserted into the installation hole 110 of the moving member 100, and cannot rebound due to excessive deformation, and can have enough rebound force to clamp the moving member 100, for example, 10°, 15°, 20°, etc.

[0068] In order to make the two elastic arms 320 rebound in the direction of approaching each other to hold the moving member 100, as shown in Figures 4 to 6 The installation hole 110 is provided with two installation holes 110 corresponding to the elastic arm 320, wherein the distance W2 between the two installation holes 110 is less than the minimum distance W1 between the two elastic arms 320 in the natural state. It should be noted that the natural state of the elastic arm 320 refers to the state of the elastic arm 320 without force.

[0069] Among them, as shown in Figure 4As shown, the diameter of the mounting hole 110 can be slightly larger than the thickness of the corresponding elastic arm 320. In this way, the elastic arm 320 can be smoothly inserted into the mounting hole 110, and the elastic arm 320 can avoid excessive extrusion of the inner wall of the mounting hole 110 during the process of inserting into the corresponding mounting hole 110, thereby further reducing the probability of generating plastic chips.

[0070] In this embodiment, as shown in Figure 4 , Figure 7 and Figure 8 , one end of the elastic arm 320 away from the gland 310 is provided with a pawl 330, which extends along the rebound direction of the elastic arm 320 and abuts against the outer wall of the moving piece 100. The pawl 330 can limit the elastic arm 320 in the insertion direction of the elastic arm 320 through cooperation with the gland 310, so as to avoid the elastic arm 320 from shaking (or even falling off from the mounting hole 110 of the moving piece 100).

[0071] Among them, the pawls 330 of the two elastic arms 320 extend in the direction close to each other.

[0072] In this embodiment, as shown in Figure 7 and Figure 11 , the side of the gland 310 facing the moving piece 100 is provided with a first limiting portion 311, and the side of the moving piece 100 facing the gland 310 is provided with a second limiting portion 120, and the first limiting portion 311 cooperates with the second limiting portion 120 to limit the gland 310 in the direction perpendicular to the rebound direction of the elastic arm 320. Through the cooperation of the first limiting portion 311 and the second limiting portion 120, the elastic arm 320 can be limited in the direction perpendicular to the insertion direction and the rebound direction of the elastic arm 320, so as to avoid the elastic arm 320 from shaking, thereby being able to firmly install the movable contact assembly 200 on the moving piece 100.

[0073] As an example, the second limiting portion 120 is a groove, and the first limiting portion 311 is a protrusion inserted into the groove. In this example, as shown in Figure 7 , the elastic arm 320 extends from the second limiting portion 120 towards the direction away from the gland 310. In this way, the elastic arm 320 can be connected with the second limiting portion 120 without being connected with the gland 310, so that the gland 310 has a larger area to press the movable contact assembly 200, and the size of the gland 310 can be reduced, so that the structure of the gland 310 is more compact. Among them, referring to Figure 7 , the second limiting portion 120 can extend from one end of the gland 310 to the other end in the rebound direction of the elastic arm 320.

[0074] As another example, the first limiting portion 311 is a groove, and the second limiting portion 120 is a protrusion inserted into the groove. As shown in Figure 4As shown, in this example, the elastic arm 320 is aligned with the first limiting portion 311 in the rebound direction. In this way, the cooperation between the first limiting portion 311 and the second limiting portion 120 is not affected, and the gland 310 has more area in the direction perpendicular to the penetrating direction and the rebound direction of the elastic arm 320 to press the movable contact assembly 200.

[0075] In this embodiment, as shown, Figures 1 to 3 the movable contact assembly 200 is provided in multiple numbers, and the multiple movable contact assemblies 200 are arranged at intervals along the length direction of the moving member 100. By providing multiple movable contact assemblies 200, the passing area of the current can be increased, so that the relay 10 can be applied to large-current electrical appliances, such as high-performance AI servers. Alternatively, as shown, Figure 12 each of the two ends of the movable contact assembly 200 in the width direction of the moving member 100 is provided with a movable contact 211.

[0076] Continuing to refer to Figures 1 to 3 , the locking member 300 is provided in at least one number, and each locking member 300 is arranged between and presses the corresponding adjacent two movable contact assemblies 200 on the moving member 100. When installed, the corresponding adjacent two movable contact assemblies 200 are first inserted on the moving member 100, and then the locking member 300 is inserted into the corresponding mounting hole 110 on the moving member 100, so that the locking of the adjacent two movable contact assemblies 200 is realized, which can simplify the disassembly and assembly steps of the movable contact assembly 200, and also can reduce the number of locking members 300; in addition, the arrangement of the locking member 300 and the movable contact assembly 200, i.e., one locking member 300 corresponding to two movable contact assemblies 200, facilitates switching and can also meet the demand for large gaps.

[0077] Alternatively, two movable contact assemblies 200 share one locking member 300. For example, as shown, Figures 1 to 3 the movable contact assembly 200 is provided in four numbers along the length direction of the moving member 100, wherein the two movable contact assemblies 200 on the left share one locking member 300, and the two movable contact assemblies 200 on the right share one locking member 300.

[0078] Alternatively, the first limiting portion 311 is arranged at the middle of the gland 310, and the two ends of the gland 310 in the length direction of the moving member 100 press the corresponding adjacent two movable contact assemblies 200.

[0079] In this embodiment, the length direction of the moving piece 100 is perpendicular to the rebound direction of the elastic arms 320, i.e. the two elastic arms 320 are arranged along the width direction of the moving piece 100. In this way, the two elastic arms 320 can be arranged in the middle of the compression cover 310 along the width direction of the moving piece 100, so that the compression cover 310 has sufficient area at both ends of the moving piece 100 along the length direction to press fit the moving contact assembly 200, and the elastic arms 320 also have a larger rebound space to effectively hold the moving piece 100.

[0080] Of course, in other embodiments, the length direction of the moving piece 100 can also be parallel to the rebound direction of the elastic arms 320, i.e. the two elastic arms 320 are arranged along the length direction of the moving piece 100.

[0081] In this embodiment, as shown in Figure 11 , the moving contact assembly 200 includes the moving spring sheet 210 and the receiving piece 220 connected together, and the side of the moving spring sheet 210 opposite to the receiving piece 220 is provided with a plurality of moving contacts 211; see Figure 5 and Figure 6 , the moving piece 100 has a plug-in cavity 130, the plug-in cavity 130 includes a through hole part 131 and a groove part 132 in communication, the through hole part 131 is used for the moving spring sheet 210 to pass through, and the compression cover 310 is used for pressing the receiving piece 220 in the groove part 132 from the slot of the groove part 132. When installing, the moving spring sheet 210 and the receiving piece 220 of the moving contact assembly 200 can be respectively arranged in the through hole part 131 and the groove part 132 at the slot side of the groove part 132, and then the compression cover 310 is buckled on the moving piece 100 after the compression cover 310 and the groove bottom of the groove part 132 abut, so that the moving contact assembly 200 can be pressed on the moving piece 100.

[0082] In this embodiment, as shown in Figure 12 , the moving contact assembly 200 further includes a compression spring sheet 240 and at least two shafts 230, the shafts 230 are protruded on the receiving piece 220, the moving spring sheet 210 is arranged on the shafts 230 and can move along the axial direction of the shafts 230, and the compression spring sheet 240 is connected between the moving spring sheet 210 and the receiving piece 220 and can provide an acting force to the moving spring sheet 210 to move away from the receiving piece 220. As an example, the shafts 230 are arranged in two along the width direction of the moving spring sheet 210, or in two along the length direction of the moving spring sheet 210.

[0083] By the above arrangement, firstly, the number of the mandrels 230 is at least two, instead of only one mandrel 230 is used to assemble the compression spring 240 and the moving spring 210 relatively. Therefore, the two or more mandrels 230 between the moving spring 210 and the compression spring 240 avoid the moving contact assembly 200 from rotating around the axis provided by one mandrel 230, but resist the circumferential rotation of the moving contact assembly 200 by using two or more mandrels 230, thereby ensuring that the moving contact 211 of the moving contact assembly 200 can form accurate alignment contact with the stationary contact of the stationary contact assembly, and improving the stability of the contact; secondly, when the moving contact assembly 200 moves close to or away from the stationary contact assembly 200, and the moving contact assembly 200 contacts or separates from the stationary contact assembly, the moving spring 210 and the compression spring 240 can slide in the axial direction of the mandrel 230 relative to the mandrel 230 after being stressed, thereby forming a buffer and self-adapting adjustment, and improving the motion stability and safety.

[0084] In one embodiment, as shown in Figure 13 The compression spring 240 can include a compression spring center part 241 and two compression spring extension parts 242 located on both sides of the compression spring center part 241, and the compression spring center part 241 has a compression spring shaft hole 241a for the mandrel 230 to pass through, and the compression spring center part 241 elastically abuts against the receiving member 220. The compression spring center part 241 can be designed as a quadrilateral area, the compression spring extension part 242 can be provided as a long strip plate structure, and the width of the compression spring extension part 242 can gradually decrease along the direction away from the compression spring center part 241. At the same time, the outer end of the compression spring extension part 242 is provided with a curved abutting part 243, and the curved abutting part 243 elastically abuts against the moving spring 210.

[0085] In one embodiment, as shown in Figure 14 The mandrel 230 includes a first shaft segment 231, a second shaft segment 232 and a limiting shaft end 233 connected in sequence, and the diameters of the first shaft segment 231 and the second shaft segment 232 are different. Therefore, the diameters of the first shaft segment 231 and the second shaft segment 232 can be designed to match the sizes of the compression spring shaft hole 241a and the moving spring shaft hole (i.e. the through hole on the moving spring 210 for the mandrel 230 to pass through), for example, appropriate clearance fit. In one embodiment, the diameter of the first shaft segment 231 is smaller than the diameter of the second shaft segment 232.

[0086] At this time, the first shaft segment 231 can be movably arranged in the compression spring shaft hole 241a of the compression spring piece 240, and the first shaft segment 231 is fixedly connected with the receiving piece 220. The second shaft segment 232 can be movably arranged in the moving spring shaft hole of the moving spring piece 210. The limiting shaft end 233 has a larger structure size, so that the limiting shaft end 233 can be in limiting contact with the moving spring piece 210 on the side of the moving spring piece 210 away from the compression spring piece 240, preventing the moving spring piece 210 and the compression spring piece 240 from being separated from the mandrel 230, and ensuring the assembly stability of the components.

[0087] The first shaft segment 231 extends out of the receiving piece 220 and is riveted with the receiving piece 220. Alternatively, as shown in Figure 6 The groove wall of the groove portion 132 facing the through hole portion 131 has at least two accommodation grooves 140 for accommodating the free end of the corresponding first shaft segment 231 (i.e. the end of the first shaft segment 231 away from the limiting shaft end 233). The groove portion 132 can avoid the free end of the first shaft segment 231, so that the receiving piece 220 can abut against the groove wall of the groove portion 132, preventing the moving contact assembly 200 from shaking in the length direction of the moving piece 100, and ensuring the installation firmness of the moving contact assembly 200 on the moving piece 100.

[0088] Continuing to refer to Figure 6 , the insertion cavity 130 is provided with a stop portion 133 located at the junction between the through hole portion 131 and the groove portion 132 and abutting against the receiving piece 220. The stop portion 133 can limit the receiving piece 220 of the moving contact assembly 200 in the groove portion 132, preventing the moving contact assembly 200 from shaking in the length direction of the moving piece 100.

[0089] As described above, the moving piece 100 can move in the contact cavity 100b, thereby driving the contact system to switch between the closed state and the open state. In an embodiment, as shown in Figure 15 The side of the cover plate 700 facing the moving piece 100 is provided with a limiting rail 710 along which the moving piece 100 is slidingly assembled. In this way, the moving piece 100 drives the moving contact assembly 200 to move in the base 600 relative to the static contact assembly according to the expected trajectory. Meanwhile, as shown in Figure 4 , Figure 6 and Figure 9 The side of the moving piece 100 facing the cover plate 700 can also be provided with a limiting protrusion 150, so that the moving piece 100 can be slidingly assembled with the limiting rail 710 through the limiting protrusion 150.

[0090] Of course, the side of the separation portion 610 of the base 600 facing the moving piece 100 can also be provided with a limiting rail along which the moving piece 100 is slidingly assembled.

[0091] Based on the feature that the moving part 100 is provided with the limiting protrusion 150, this application adopts Figure 6 The locking member 300 is installed in a side insertion manner as shown, that is, the mounting hole 110 is perpendicular to the direction from the magnetic circuit cavity 600a to the contact cavity 600b (ie Figure 6 If you use Figure 6 In order to plug the locking member 300 in the up and down directions, it is necessary to open a mounting hole 110 on the side of the moving member 100 facing the cover plate 700 or the side facing the partition 610, and it is also necessary to have enough space on the side of the moving member 100 facing the cover plate 700 or the side facing the partition 610 to place the locking cover 310 of the locking member 300. This is not conducive to setting a limiting protrusion 150 that cooperates with the limiting track on the side of the moving member 100 facing the cover plate 700 or the side facing the partition 610. Therefore, the present application adopts a side insertion method to plug the locking member 300 onto the moving member 100.

[0092] Example 2

[0093] This embodiment provides a relay 10, such as Figure 11 As shown, different from the relay 10 provided in embodiment 1, the two elastic arms 320 of this embodiment are inclined in a direction away from each other, so that the two elastic arms 320 can rebound in a direction away from each other.

[0094] As an example, the number of mounting holes 110 may be one, and the width of the mounting hole 110 is smaller than the maximum distance between the two elastic arms 320 in a natural state.

[0095] As another example, there may be two mounting holes 110 , and the distance between the two mounting holes 110 is smaller than the maximum distance between the two elastic arms 320 in the natural state.

[0096] In this embodiment, the claws 330 of the two resilient arms 320 extend in a direction away from the sheet and from each other.

[0097] Compared with the installation mode of interference fit of the moving contact assembly in the relay, the embodiment adopts the mode of compression of the locking piece 300 to install the moving contact assembly 200 on the moving piece 100, wherein the elastic arm 320 of the locking piece 300 has a certain elasticity, so that the elastic arm 320 can be smoothly installed in the installation hole 110 of the moving piece 100 after extrusion deformation, and finally locked by relying on the elastic force of itself to tightly hold the moving piece 100, so that the gland 310 can compress the moving contact assembly 200 on the moving piece 100, without applying a large installation force to the moving contact assembly 200 to realize the interference fit with the moving piece 100, which can effectively avoid the pollution of the static and dynamic contacts due to the generation of plastic chips during the assembly process of the moving contact assembly 200, improve the reliability of the contact of the static and dynamic contacts, and effectively fasten and limit the moving contact assembly 200.

[0098] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0099] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A relay characterized by comprising: The utility model relates to a mobile contact assembly and locking device thereof, comprising: a mobile piece capable of moving and having a mounting hole; and a dynamic contact assembly mounted on the mobile piece by a locking device, wherein the locking device comprises a gland and a plurality of elastic arms, the gland is located outside the mobile piece and abuts against the mobile piece, the elastic arms are arranged through the mounting hole and can be locked by relying on the elastic force of the elastic arms to tightly hold the mobile piece, so that the gland can press the dynamic contact assembly on the mobile piece.

2. The relay according to claim 1, characterized in that Therefore, the elastic arms are provided as two, and the two elastic arms are inclined in the direction of approaching or moving away from each other, so that the two elastic arms can rebound in the direction of approaching or moving away from each other.

3. The relay according to claim 2, characterized in that The rebounding direction of the elastic arms is parallel or perpendicular to the length direction of the mobile piece.

4. The relay of claim 2, wherein When the two elastic arms rebound in the direction of approaching each other, the mounting hole is provided as two and corresponds to the elastic arms one by one. When the two elastic arms rebound in the direction of moving away from each other, the mounting hole is provided as one, or provided as two and corresponds to the elastic arms one by one.

5. The relay of claim 1, wherein The end of the elastic arm away from the gland is provided with a pawl, the pawl extends in the rebounding direction of the elastic arm and abuts against the outer wall of the mobile piece.

6. The relay of claim 1, wherein The side of the gland facing the mobile piece is provided with a first limiting part, and the side of the mobile piece facing the gland is provided with a second limiting part, the first limiting part and the second limiting part cooperate to limit the gland in the direction perpendicular to the rebounding direction of the elastic arm. One of the first limiting part and the second limiting part is a groove, and the other is a protrusion inserted into the groove.

7. The relay according to claim 6, characterized in that The elastic arm is aligned with the first limiting part in the rebounding direction of the elastic arm, or the elastic arm extends from the second limiting part towards the direction away from the gland.

8. The relay according to any one of claims 1 to 7, characterized in that The dynamic contact assembly is provided as a plurality, and the plurality of dynamic contact assemblies are arranged at intervals in the length direction of the mobile piece. The locking device is provided as at least one, and each locking device is arranged between the corresponding adjacent two dynamic contact assemblies and presses the corresponding adjacent two dynamic contact assemblies on the mobile piece.

9. The relay according to any one of claims 1 to 7, characterized in that The dynamic contact assembly comprises a dynamic spring piece and a receiving piece connected to each other, and the side of the dynamic spring piece opposite to the receiving piece is provided with a plurality of dynamic contacts. The mobile piece has a plug-in cavity, the plug-in cavity comprises a through hole part and a groove part in communication, the through hole part is used for arranging the dynamic spring piece, and the gland can press the receiving piece in the groove part from the slot of the groove part.

10. The relay of claim 9, wherein The dynamic contact assembly further comprises a compression spring piece and at least two shafts. The shafts are protruded on the receiving piece, the dynamic spring piece is arranged on the shafts and can move in the axial direction of the shafts. The compression spring piece is connected between the dynamic spring piece and the compression spring piece and can provide an action force to the dynamic spring piece moving away from the receiving piece.

11. The relay of claim 10, wherein The shaft comprises a first shaft segment, a second shaft segment and a limiting shaft end connected in sequence, and the diameter of the first shaft segment and the diameter of the second shaft segment are different. The first shaft section is movably arranged in the compression spring, and the first shaft section is fixedly connected with the bearing member; the second shaft section is movably arranged in the moving spring; the limiting shaft end is in limiting contact with the moving spring on the side of the moving spring away from the compression spring.

12. The relay of claim 11, wherein, The free end of the first shaft section extends out of the bearing member; The groove wall of the recessed groove part facing the through hole part has at least two accommodation grooves for accommodating the free end of the corresponding first shaft section.

13. The relay of claim 9, wherein, A stop portion is arranged in the insertion cavity, and the stop portion is located at the junction between the through hole part and the recessed groove part and is in abutment with the bearing member.

14. The relay according to any one of claims 1 to 7, characterized in that The relay further comprises a base and a cover plate. A separation portion is arranged in the base, and the separation portion is used to separate the inner cavity of the base into a magnetic circuit type cavity and a contact type cavity; the moving member is movably arranged in the contact type cavity; and the cover plate is arranged at the bottom of the base to close the contact type cavity. The side of the separation portion facing the moving member and / or the side of the cover plate facing the moving member is provided with a limiting track, and the moving member is slidably assembled along the limiting track.

15. The relay of claim 14, wherein, The mounting hole is arranged in a direction perpendicular to the direction from the magnetic circuit type cavity to the contact type cavity.

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