Push rod assembly, preparation method thereof and relay

Abstract

The invention relates to the technical field of electronic control devices, in particular to a push rod assembly, a preparation method thereof and a relay. The push rod assembly comprises an insulating base, a push rod and a metal assembly, the metal assembly is arranged on the side, opposite to the push rod, of the insulating base in the axial direction of the push rod, and the insulating base is provided with a retaining wall structure; in the radial direction of the push rod, the retaining wall structure is located on at least one side of the metal assembly so as to increase the creepage distance between the metal assembly and the push rod. The push rod assembly can increase the creepage distance between the elastic piece and the push rod and between the support frame and the push rod, thereby improving the safety level of the relay, and guaranteeing the structural performance of the relay.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic control devices, and in particular to a push rod assembly and a preparation method thereof, and 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] The existing relay is provided with a push rod assembly, and the insulating seat in the push rod assembly is equipped with an elastic member, a support frame and a push rod. It is worth noting that when the power supply voltage increases, the creepage distance requirements between the support frame, the elastic member and the push rod increase. When the creepage distance is not safe enough, it is very easy to cause the safety level of the relay to decrease, and affect the structural performance of the relay. Summary of the invention

[0004] The embodiment of the present invention provides a push rod assembly and a preparation method thereof, and a relay. The push rod assembly can increase the creepage distance between the elastic member and the support frame and the push rod, thereby improving the safety level of the relay and ensuring the structural performance of the relay.

[0005] The push rod assembly provided in an embodiment of the present invention includes: an insulating seat, a push rod and a metal component. Along the axial direction of the push rod, the metal component is provided on the side of the insulating seat facing away from the push rod, and the insulating seat is provided with a retaining wall structure; along the radial direction of the push rod, the retaining wall structure is located on at least one side of the metal component to increase the creepage distance between the metal component and the push rod.

[0006] According to some embodiments of the invention, the insulating seat includes a main body and a protruding portion, one axial end of the push rod is enclosed in the main body, and the other end of the push rod extends from the main body; the protruding portion is located on the side of the main body facing away from the push rod, and the protruding portion protrudes from the main body toward the direction away from the push rod; the metal component is fixed to the end of the protruding portion facing away from the main body.

[0007] According to some embodiments of the present invention, the retaining wall structure extends from the main body toward a side facing away from the push rod, and along a radial direction of the push rod, the retaining wall structure and the protruding portion have a gap on a side facing each other.

[0008] According to some embodiments of the present invention, the retaining wall structure is disposed around the protruding portion.

[0009] According to some embodiments of the present invention, along the axial direction of the push rod, a surface of the retaining wall structure facing away from the push rod is lower than a fixing position of the metal component and the protrusion.

[0010] According to some embodiments of the present invention, the retaining wall structure is provided with a first creepage groove along at least one side of the radial direction of the push rod.

[0011] According to some embodiments of the present invention, the retaining wall structure is provided with the first creepage groove on the side facing away from the protruding portion.

[0012] According to some embodiments of the present invention, the retaining wall structure is an annular structure; and the first creepage groove is arranged around the retaining wall structure.

[0013] According to some embodiments of the present invention, there are multiple first creepage grooves located on the same side of the retaining wall structure, and the multiple first creepage grooves are spaced apart in the axial direction of the push rod.

[0014] According to some embodiments of the present invention, a second creepage groove is provided on the surface of the protrusion.

[0015] According to some embodiments of the present invention, the second creepage groove is arranged around the protrusion.

[0016] According to some embodiments of the present invention, there are multiple second creepage grooves, and the multiple second creepage grooves are spaced apart in the axial direction of the push rod.

[0017] According to some embodiments of the invention, an auxiliary dynamic spring is further included, wherein the auxiliary dynamic spring includes an auxiliary dynamic spring piece and an auxiliary dynamic contact, wherein at least a portion of the auxiliary dynamic spring piece is covered in the insulating seat, and the auxiliary dynamic contact is provided at a portion of the auxiliary dynamic spring piece extending out of the insulating seat;

[0018] The retaining wall structure is located on at least one side of the metal component to increase the creepage distance between the metal component and the auxiliary dynamic spring.

[0019] According to some embodiments of the present invention, the auxiliary dynamic spring is connected to the push rod and the insulating seat by integral injection molding.

[0020] According to some embodiments of the invention, the insulating seat further includes a cover shell, the cover shell is connected to the insulating seat, and the cover shell covers the auxiliary moving contact.

[0021] According to some embodiments of the invention, the cover shell covers the portion of the auxiliary moving spring extending from the insulating seat and the auxiliary moving contact.

[0022] According to some embodiments of the present invention, the cover shell is provided with an opening in a direction perpendicular to the axial direction of the push rod.

[0023] According to some embodiments of the invention, the metal component includes an elastic member and a support frame, the support frame is connected to the insulating seat, and the support frame follows the push rod; the elastic member is connected to the insulating seat and the active spring, and the elastic member is used to provide contact pressure to the active spring.

[0024] According to some embodiments of the present invention, the support frame is connected to the push rod and the insulating seat by integral injection molding.

[0025] According to some embodiments of the invention, the support frame includes a bottom plate, at least a portion of which is enclosed within the insulating seat;

[0026] The support frame includes a bottom plate, a top plate and two side plates arranged opposite to each other. Along the axial direction of the push rod, the two side plates are located on the same side of the bottom plate; the top plate is connected to the other end of the two side plates facing away from the bottom plate to form a frame structure with the bottom plate and the two side plates; the frame structure is used to accommodate the active spring.

[0027] According to some embodiments of the invention, the elastic member is located in the frame-shaped structure, and the elastic member is connected to the active spring to provide contact pressure to the active spring.

[0028] The present invention also provides a relay, comprising a push rod assembly provided by any of the above technical solutions.

[0029] The present invention also provides a method for preparing a push rod assembly, comprising:

[0030] An insulating seat is formed between the push rod and the metal component through an injection molding process, so that the push rod and the metal component are fixed to the insulating seat to form a retaining wall structure.

[0031] The present invention also provides a method for preparing a push rod assembly, comprising:

[0032] Using an injection molding process, a first structural member is formed between the push rod and the metal component, so that the push rod and the metal component are fixed to the first structural member;

[0033] The injection molding process is used again to form a second structural member on the first structural member, so that the second structural member and the first structural member form an insulating seat; wherein the second structural member cooperates with the first structural member to form the insulating seat, and the second structural member forms a retaining wall structure of the insulating seat.

[0034] According to some embodiments of the invention, before forming the first structural member between the push rod and the metal component by using an injection molding process, the preparation method further includes:

[0035] An auxiliary dynamic spring is provided, and the first structural member wraps at least a portion of the auxiliary dynamic spring leaf in the auxiliary dynamic spring.

[0036] According to some embodiments of the present invention, when the second structural member is formed on the first structural member, the second structural member also forms a cover shell of the insulating seat, and the cover shell covers the auxiliary moving contact provided on the auxiliary moving spring.

[0037] An embodiment of the above invention has at least the following advantages or beneficial effects:

[0038] In the push rod assembly provided by the present invention, along the axial direction of the push rod, the metal assembly is arranged on the side of the main body portion facing away from the push rod; and along the radial direction of the push rod, the retaining wall structure on the insulating seat is located on at least one side of the metal assembly, so that the retaining wall structure is arranged in the creeping path from the metal assembly to the push rod. Specifically, when creeping from the metal assembly to the push rod, it is necessary to pass through the retaining wall structure and creep along the surface of the retaining wall structure. Accordingly, the retaining wall structure can lengthen the creeping path from the metal assembly to the push rod, thereby increasing the creeping distance from the metal assembly to the push rod, so as to improve the insulation level of the relay, as well as the structural performance and safety performance of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Shown is a top view of a relay provided by an embodiment of the present invention;

[0040] Figure 2 It shows Figure 1 Sectional view at AA in the middle;

[0041] Figure 3 It shows Figure 1 Sectional view at the middle BB;

[0042] Figure 4 It shows Figure 2 A schematic diagram of the three-dimensional structure of the middle push rod assembly after being assembled with the active spring;

[0043] Figure 5 It shows Figure 4 Sectional view at M in the middle;

[0044] Figure 6 It shows Figure 4 Plan view of the structure in the middle;

[0045] Figure 7 It shows Figure 4 a plan view of the structure at a second angle;

[0046] Figure 8 It shows Figure 4 a plan view of the middle structure at a third angle;

[0047] Fig. 9 It is shown that Figure 4 Schematic diagram of the three-dimensional structure after the active spring is removed from the middle structure;

[0048] Fig.10 It is shown that Fig. 9 Plan view of the structure in the middle;

[0049] Fig.11 It is shown that Fig. 9 a plan view of the structure at a second angle;

[0050] Fig.12 It is shown that Fig. 9 Sectional view at point N;

[0051] Fig.13 It is shown that Fig.12 A cross-sectional view of the structure;

[0052] Fig.14 It is shown that Fig.12 Plan view of the structure in the middle;

[0053] Fig.15 It is shown that Fig.13 A plan view of the middle structure after removing the cover;

[0054] Fig.16 It is shown that Fig. 9 A schematic diagram of the three-dimensional structure when the second structural member is removed from the middle structure;

[0055] Fig.17 It is shown that Fig.15 Sectional view at midplane P;

[0056] Fig.18 It is shown that Fig.15 Sectional view at midplane Q;

[0057] Fig.19 It is shown that Fig. 9 A schematic diagram of the three-dimensional structure of the second structural member;

[0058] Fig. 20 It is shown that Fig.19 Schematic diagram of the structure at another angle;

[0059] Fig.21 It is shown that Fig.19 A schematic plan view of the structure;

[0060] Fig. 22 It is shown that Fig.21 Cross-sectional view at CC.

[0061] The following are the descriptions of the reference numerals:

[0062] 10. Relay; 100. Yoke iron plate; 200. Insulation cover; 300. Main contact part; 310. Active spring; 320. Static contact; 321. Lead-out terminal; 322. Static contact; 400. Push rod assembly; 410. Insulation seat; 411. Retaining wall structure; 4111. First creepage groove; 412. Main body; 412a. First structural member; 412b. Second structural member; 413. Protrusion; 4131. Second creepage groove; 413 2. Assembly groove; 414. Cover shell; 4141. Opening; 4142. First plate body; 4143. Second plate body; 420. Push rod; 430. Metal component; 431. Elastic member; 432. Support frame; 4321. Bottom plate; 4322. Top plate; 4323. Side plate; 43231. Extension portion; 440. Auxiliary moving spring; 441. Auxiliary moving spring sheet; 442. Auxiliary moving contact; 500. Magnetic circuit component; 600. Auxiliary static spring. DETAILED DESCRIPTION

[0063] 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 the present invention 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.

[0064] like Figures 1 to 3 An embodiment of the present invention provides a relay 10 , which includes a yoke plate 100 , an insulating cover 200 , a main contact portion 300 , a push rod assembly 400 and a magnetic circuit assembly 500 .

[0065] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products or devices.

[0066] The yoke plate 100 is provided with a through hole structure, and the through hole structure penetrates two side surfaces in the thickness direction of the yoke plate 100. The insulating cover 200 is provided on one side surface of the yoke plate 100, and covers the through hole structure of the yoke plate 100.

[0067] The main contact part 300 is arranged in the insulating cover 200, and the main contact part 300 includes an active spring 310 and two static contacts 320. The static contact 320 is fixed relative to the insulating cover 200, and one end of the static contact 320 penetrates to the outside of the insulating cover 200 to form a lead-out end 321, and the other end of the static contact 320 located in the insulating cover 200 forms a static contact 322. The active spring 310 is movably arranged in the insulating cover 200, and moving contacts are arranged at both ends of the length direction of the active spring 310; each moving contact corresponds to a static contact 322, and the moving contact moves with the active spring 310 to contact or disengage with the corresponding static contact 322, so as to realize the closing or disconnection of the main contact of the main contact part 300. It should be understood that the moving contact and the static contact 322 in the main contact part 300 form the main contact.

[0068] The push rod assembly 400 penetrates the yoke iron plate 100. Specifically, the push rod assembly 400 is movably arranged in the through hole structure of the yoke iron plate 100. The active spring 310 of the main contact part 300 follows the push rod assembly 400. When the push rod assembly 400 moves back and forth, it can drive the active spring 310 to move, thereby realizing the closing or opening of the main contact in the main contact part 300. Figure 2 and Figure 3 The middle push rod assembly 400 is roughly circled by a dotted frame, and the specific position may be biased, which will not be described in detail here.

[0069] The magnetic circuit assembly 500 is used to drive the reciprocating motion of the push rod assembly 400 so that the active spring 310 follows the push rod assembly 400 , thereby realizing the closing or opening of the main contact in the main contact part 300 . Figure 2 and Figure 3 The middle magnetic circuit component 500 is roughly circled by a dotted frame, and the specific position may be biased, which will not be elaborated here.

[0070] The push rod assembly 400 in the relay 10 provided in the embodiment of the present invention can be a push rod assembly 400 in any of the following technical solutions. Of course, the push rod assembly 400 can also be configured in other ways according to the requirements, which will not be described in detail here.

[0071] Please combine Figure 1 and Figure 3 refer to Figures 4 to 22 The structure shown in the figure, the embodiment of the present invention provides a push rod assembly 400. Figures 4 to 8 As shown, the push rod assembly 400 includes: an insulating seat 410 , a push rod 420 and a metal assembly 430 . Figure 4 The midplane M passes through the axis of the push rod 420 .

[0072] like Figures 4 to 8As shown, along the axial direction of the push rod 420, a metal component 430 is provided on the side of the insulating seat 410 facing away from the push rod 420, and the insulating seat 410 is provided with a retaining wall structure 411; along the radial direction of the push rod 420, the retaining wall structure 411 is located on at least one side of the metal component 430 to increase the creepage distance between the metal component 430 and the push rod 420.

[0073] It should be understood that "creepage path" refers to the possible creeping path of two metal parts between insulating surfaces, and "creepage distance" refers to the minimum distance between two conductive parts measured along the insulating surface. The insulating seat 410 in this embodiment is made of insulating material and serves as an insulating surface in the creepage path; the metal component 430 and the push rod 420 serve as metal parts.

[0074] It should be noted that in the push rod assembly 400 provided in the embodiment of the present invention, along the axial direction of the push rod 420, the metal assembly 430 is arranged on the side of the body 412 facing away from the push rod 420; and along the radial direction of the push rod 420, the retaining wall structure 411 is located on at least one side of the metal assembly 430, so that the retaining wall structure 411 is arranged in the creeping path of the current from the metal assembly 430 to the push rod 420. Specifically, as Figure 5 As shown, when creeping from the metal component 430 to the push rod 420, it needs to pass through the retaining wall structure 411 and creep along the surface of the retaining wall structure 411. Accordingly, the retaining wall structure 411 can lengthen the creeping path between the metal component 430 and the push rod 420, thereby increasing the creeping distance between the metal component 430 and the push rod 420, thereby improving the insulation level of the relay 10, and improving the structural performance and safety performance of the relay 10.

[0075] For example, Figure 4 As shown, the metal component 430 includes an elastic member 431 and a support frame 432, the support frame 432 is connected to the insulating seat 410, and the support frame 432 moves with the push rod 420; the elastic member 431 is connected to the insulating seat 410 and the active spring 310, and the elastic member 431 is used to provide contact pressure to the active spring 310. At this time, the retaining wall structure 411 in this embodiment may play two roles at the same time, one is to extend the creepage path between the support frame 432 and the push rod 420; the other is to extend the creepage path between the elastic member 431 and the push rod 420. The creepage distance between the metal component 430 and the push rod 420 may be formed by the support frame 432 and the push rod 420, or may be formed by the elastic member 431 and the push rod 420.

[0076] Figure 5 The creepage distance is illustrated by taking the elastic member 431 as an example. Of course, the specific creepage distance between the metal component 430 and the push rod 420 is not limited to this. It is worth noting that Figure 5As shown by the middle dotted line, during the creeping process, it is necessary to creep along the surface of the retaining wall structure 411 , so the height of the retaining wall structure 411 in the axial direction of the push rod 420 affects the creepage distance.

[0077] It should be understood that when the retaining wall structure 411 is arranged, the number of the retaining wall structure 411 can be set according to the requirements, and multiple retaining wall structures 411 can be arranged at intervals in the radial direction of the push rod 420 to further extend the creepage path and increase the creepage distance. Moreover, the retaining wall structure 411 can be arranged to surround part or all of the metal component 430 according to the requirements. Figures 4 to 8 In the figure, only one continuous retaining wall structure 411 is provided. Of course, the specific setting is not limited to this.

[0078] Please refer to Figures 4 to 8 In the structure shown, the insulating seat 410 includes a main body 412 and a protruding portion 413. Figure 5 The main body 412, the protruding portion 413 and the retaining wall structure 411 are schematically separated by dotted lines. One axial end of the push rod 420 is covered in the main body 412, and the other end of the push rod 420 extends from the main body 412; the protruding portion 413 is located on the side of the main body 412 facing away from the push rod 420, and the protruding portion 413 protrudes from the main body 412 in a direction away from the push rod 420; the metal component 430 is fixed to the end of the protruding portion 413 facing away from the main body 412.

[0079] It should be noted that in this embodiment, along the axial direction of the push rod 420, the metal component 430 is fixed to the side of the protrusion 413 facing away from the push rod 420, such as Figure 5 As shown, the creepage path between the metal component 430 and the push rod 420 can be extended to increase the creepage distance and improve the safety performance.

[0080] like Figure 4 and Figure 5 As shown, in this embodiment, in one embodiment, the retaining wall structure 411 extends from the main body 412 to the side facing away from the push rod 420 , and along the radial direction of the push rod 420 , the retaining wall structure 411 and the protrusion 413 have a gap on the side facing each other.

[0081] It should be understood that the size of the gap value will also affect the creepage path, and thus the creepage distance. Specifically, when designing the gap value, if the gap value increases, the creepage path will be extended accordingly. Of course, considering that the size of the insulating seat 410 affects the integration of the relay 10, the gap value cannot be increased blindly, and needs to be set according to demand.

[0082] In a specific embodiment, the retaining wall structure 411 is disposed around the protruding portion 413 .

[0083] Exemplarily, when the retaining wall structure 411 is disposed around the protrusion 413 , it can be configured that: along the axial direction of the push rod 420 , a surface of the retaining wall structure 411 facing away from the push rod 420 is lower than the fixing position of the metal component 430 and the protrusion 413 .

[0084] Please refer to Fig. 9 In the structure shown, the elastic member 431 in the embodiment of the present invention can be a contact spring or a leaf spring. When the elastic member 431 is a contact spring, the contact spring has a hollow area. Fig. 9 As shown, a mounting groove 4132 may be provided on the side of the protrusion 413 facing away from the push rod 420 , and at least a portion of the contact spring may be placed in the mounting groove 4132 .

[0085] It should be understood that Figure 4 The midplane M and Fig. 9 The middle plane N passes through the axis of the push rod 420, and the positions of the plane M and the plane N coincide with each other. Since they are in different views, they are shown in different planes.

[0086] In order to improve the stability of the contact spring after assembly, the assembly groove 4132 can be set to be annular. The size of the annular ring is adapted to the size of the contact spring, and part of the protrusion 413 in the surrounding area of ​​the assembly groove 4132 is retained to form a protruding structure relative to the bottom of the assembly groove 4132. The protruding structure can be placed in the hollow area of ​​the contact spring to cooperate with the side wall of the assembly groove 4132 and limit the elastic member 431 to prevent the elastic member 431 from shifting relative to the insulating seat 410, thereby ensuring that the elastic member 431 effectively performs the driving function.

[0087] In one embodiment, please refer to Figures 9 to 13 In the structure shown, the retaining wall structure 411 is provided with a first creepage groove 4111 on at least one side along the radial direction of the push rod 420. As an example, the retaining wall structure 411 is provided with a first creepage groove 4111 on a side facing away from the protruding portion 413.

[0088] It should be noted that the inner wall of the first creepage groove 4111 also serves as a creepage path. Accordingly, the first creepage groove 4111 can further lengthen the creepage path between the metal component 430 and the push rod 420, thereby increasing the creepage distance between the metal component 430 and the push rod 420, thereby improving the insulation level of the relay 10, and improving the structural performance and safety performance of the relay 10.

[0089] In addition, when the first creepage groove 4111 is arranged, there are many possible forms of the first creepage groove 4111, such as Fig.12As shown, the first creepage groove 4111 can be arranged around the retaining wall structure 411 in the axial plane of the vertical push rod 420. As an example, the retaining wall structure 411 is an annular structure; the first creepage groove 4111 is arranged around the retaining wall structure 411.

[0090] Alternatively, it may be provided that: the first creepage current grooves 4111 are arranged at intervals in the axial plane of the vertical push rod 420 to exert the creepage current function at a preset position.

[0091] In one embodiment, there are multiple first creepage grooves 4111 located on the same side of the retaining wall structure 411, and the multiple first creepage grooves 4111 are spaced apart in the axial direction of the push rod 420. This structural arrangement can further lengthen the creepage path between the metal component 430 and the push rod 420, thereby increasing the creepage distance between the metal component 430 and the push rod 420.

[0092] It is worth noting that Fig.13 As shown, the cross-sectional shape of the first creepage groove 4111 shown in this embodiment is roughly a regular rectangular groove, the notch of which is located on the surface of the retaining wall structure 411, and extends from the notch along the radial direction of the push rod 420 to the inside of the retaining wall structure 411. Of course, the shape of the first creepage groove 4111 is not limited to this, and the extension direction of the first creepage groove 4111 from the notch can also be set to have an angle with the radial direction of the push rod 420 according to needs, or the cross-sectional shape of the first creepage groove 4111 can be set to other special-shaped states, which will not be described in detail.

[0093] In one embodiment, please combine Fig. 9 refer to Figures 16 to 18 In the structure shown, a second creepage groove 4131 is provided on the side of the protrusion 413 facing the retaining wall structure 411 .

[0094] It should be understood that Figure 4 Midplane M, Fig. 9 Midplane N and Fig.16 The midplane P and the plane Q both pass through the axis of the push rod 420, and the positions of the plane M, the plane N and the plane P coincide with each other. Since they are in different views, they are shown in different planes. Fig.16 The midplane Q is perpendicular to the plane P.

[0095] It should be noted that the inner wall of the second creepage groove 4131 also serves as a creepage path. Accordingly, the second creepage groove 4131 can further lengthen the creepage path between the metal component 430 and the push rod 420, thereby increasing the creepage distance between the metal component 430 and the push rod 420, thereby improving the insulation level of the relay 10, and improving the structural performance and safety performance of the relay 10.

[0096] In addition, when the second creepage groove 4131 is arranged, there are many possible forms of the first creepage groove 4111, such as Fig.16 As shown, the second creepage groove 4131 can be arranged around the protrusion 413 in the axial plane of the vertical push rod 420. As an example, the second creepage groove 4131 is arranged around the protrusion 413.

[0097] Alternatively, it may be further configured that: the second creepage grooves 4131 are spaced apart in the axial plane of the vertical push rod 420 to exert the creepage function at a preset position.

[0098] In one example, there are multiple second creepage grooves 4131, and the multiple second creepage grooves 4131 are spaced apart in the axial direction of the push rod 420, so as to further lengthen the creepage path between the metal component 430 and the push rod 420, thereby increasing the creepage distance between the metal component 430 and the push rod 420.

[0099] It is worth noting that Fig.16 As shown, the cross-sectional shape of the second creepage groove 4131 shown in this embodiment is roughly irregular, and its notch is located on the surface of the retaining wall structure 411, and extends from the notch to the inside of the retaining wall structure 411. It should be understood that the extension direction of the second creepage groove 4131 from the notch is at an angle with the radial direction of the push rod 420 to further lengthen the creepage path. Of course, the cross-sectional shape of the second creepage groove 4131 can also be consistent with the cross-sectional shape of the first creepage groove 4111, which is a specified rectangular groove, or is set to other special-shaped shapes, which will not be described in detail.

[0100] In one embodiment, please combine Fig.16 refer to Figure 4 and Figure 5 In the structure shown, the push rod assembly 400 provided in the embodiment of the present invention also includes an auxiliary movable spring 440, the auxiliary movable spring 440 includes an auxiliary movable spring piece 441 and an auxiliary movable contact 442, at least part of the auxiliary movable spring piece 441 is covered in the insulating seat 410, and the auxiliary movable contact 442 is arranged on the part of the auxiliary movable spring piece 441 extending out of the insulating seat 410.

[0101] Specifically, the auxiliary movable spring 440 moves with the active sheet; when the movable contact on the active spring 310 contacts the static contact 322, the auxiliary movable contact 442 on the auxiliary movable spring 440 contacts the auxiliary static spring 600; conversely, when the movable contact on the active spring 310 is disengaged from the static contact 322, the auxiliary movable contact 442 on the auxiliary movable spring 440 is disengaged from the auxiliary static spring 600.

[0102] It is worth noting that the auxiliary spring 440 is used to monitor the closed / open state between the moving contact and the static contact 322. When the two ends of the auxiliary spring 440 move to the moment of combining with the auxiliary static spring 600, the auxiliary static in the detection circuit is connected, so that the main contact (i.e., the moving contact and the static contact 322) is detected to be connected; on the contrary, when the high-voltage DC relay 10 control coil stops energizing, the moving iron core moves in the opposite direction of the attraction under the elastic force of the reset spring, and the auxiliary spring 440 moves away from the auxiliary static spring 600 as the moving iron core is reset. When the two ends of the auxiliary spring 440 are separated from the auxiliary static spring 600, the detection circuit of the high-voltage DC relay 10 is disconnected, and the detection of the separation of the main contact (i.e., the moving contact and the static contact 322) is realized.

[0103] It should be noted that in the push rod assembly 400 provided in the embodiment of the present invention, the retaining wall structure 411 is located on at least one side of the metal assembly 430 to increase the creepage distance between the metal assembly 430 and the auxiliary moving spring 440. Specifically, when creeping from the metal assembly 430 to the auxiliary moving spring piece 441, it is necessary to pass through the retaining wall structure 411 and creep along the surface of the retaining wall structure 411. Accordingly, the retaining wall structure 411 can lengthen the creepage path between the metal assembly 430 and the auxiliary moving spring piece 441, and then the retaining wall structure 411 can extend the creepage distance between the metal assembly 430 and the auxiliary moving spring piece 441, so as to improve the insulation level of the relay 10, and improve the structural performance and safety performance of the relay 10.

[0104] As an example, the auxiliary spring 440 is connected to the push rod 420 and the insulating seat 410 by integral injection molding. In other words, the auxiliary spring 440, the push rod 420 and the insulating seat 410 are formed into a whole by injection molding. When the push rod 420 moves, the insulating seat 410 and the auxiliary spring 440 can move together with the push rod 420.

[0105] It should be noted that in the push rod assembly 400 provided in the embodiment of the present invention, the auxiliary dynamic spring 440, the push rod 420 and the insulating seat 410 are designed as an integrated whole, with fewer dimensional chains and high control accuracy, thereby ensuring the consistency of the movement trajectory of the moving contact and the auxiliary moving contact 442.

[0106] It is understandable that the insulating seat 410 can be made of high temperature resistant insulating plastic, such as PA6T, PA10T, etc.

[0107] In one embodiment, please continue to refer to Figures 4 to 22 In the structure shown, the insulating base 410 further includes a cover shell 414 , which is connected to the insulating base 410 and covers the auxiliary moving contact 442 .

[0108] It should be noted that the push rod assembly 400 provided in the embodiment of the present invention can cover the auxiliary moving contact 442 through the cover 414. The cover 414 separates the auxiliary moving contact 442 from the moving contact. When the moving contact separates from the static contact 322 to generate an arc, the cover 414 can form an isolation protection for the auxiliary moving contact 442 to prevent the arc from contaminating the auxiliary moving contact 442.

[0109] At the same time, the cover 414 can increase the creepage distance between the auxiliary dynamic spring 441 and the metal component 430, so that it can be used in an environment with a higher voltage to expand the application scenarios of the push rod assembly 400.

[0110] It is understandable that the lead-out end 321 of the static contact 320 is used to connect to the load, so the current flowing after the active spring 310 contacts the two static contacts 322 is strong electricity. Since the elastic member 431 is in contact with the active spring 310, the elastic member 431 also flows strong electricity. On the contrary, the auxiliary dynamic spring 440 and the auxiliary static spring 600 flow weak electricity. The cover 414 can also effectively separate the elastic member 431 and the auxiliary dynamic contact 442, thereby effectively isolating strong and weak electricity.

[0111] In addition, in the push rod assembly 400 provided in the embodiment of the present invention, the insulating seat 410 is of an integrated design to reduce costs and assembly processes.

[0112] like Figures 4 to 22 As shown, along the length direction of the auxiliary moving spring piece 441, both ends of the auxiliary moving spring piece 441 are provided with auxiliary moving contacts 442. There are two covers 414, which are placed on opposite sides of the main body, and each cover 414 covers the auxiliary moving contacts 442 located on the same end side of the auxiliary moving spring piece 441.

[0113] In one embodiment, please continue to refer to Figures 4 to 22 In the structure shown, the cover 414 covers the portion of the auxiliary moving spring 441 extending from the insulating seat 410 and the auxiliary moving contact 442 .

[0114] In this embodiment, the metal component 430 and the auxiliary dynamic spring 440 are isolated on both sides by the cover 414. When creeping from the metal component 430 to the auxiliary dynamic spring 440, it is necessary to creep along the entire surface of the cover 414 to the edge of the cover 414 away from the main body 412, and then climb over the edge to move to the auxiliary dynamic spring 440. In other words, when creeping from the metal component 430 to the auxiliary dynamic spring 440, there is no hole structure on the surface of the cover 414 to provide a creeping path for the current.

[0115] In one embodiment, the cover 414 is provided with an opening 4141 in a direction perpendicular to the axial direction of the push rod 420. It should be understood that in the relay 10 provided in the embodiment of the present invention, the auxiliary static contact 322 and the auxiliary moving contact 442 can be in a normally open state, and the opening 4141 does not affect the structural performance of the relay 10.

[0116] It should be noted that the structural design of the opening 4141 can reduce weight, improve assembly visualization, and further facilitate the demolding operation after injection molding, thereby reducing the difficulty of preparing the push rod assembly 400.

[0117] It is worth noting that the number of openings 4141 on each cover 414 can be one, two, or three, etc., which can be set according to needs. As an example, the openings 4141 on each cover 414 that play the same function can be arranged along the diagonal of the insulating seat 410 with the openings 4141 on another cover 414 that play the same function.

[0118] In one embodiment, Fig. 9 and Fig.12 As shown, the housing 414 includes: a first plate 4142 and a second plate 4143, wherein:

[0119] The first plate body 4142 is connected to the retaining wall structure 411, and the extension direction of the first plate body 4142 is perpendicular to the axis of the push rod 420;

[0120] The second plate 4143 extends from the first plate 4142 , and the extending direction of the second plate 4143 is perpendicular to the extending direction of the first plate 4142 . The second plate 4143 defines an opening 4141 .

[0121] In specific settings, the size of the opening 4141 can be set according to requirements. For example, the size of the opening 4141 can be set larger to facilitate the demolding operation during the preparation of the insulating seat 410. Of course, the size of the opening 4141 cannot be set too large to ensure the structural strength of the cover 414 so that it meets the isolation requirements.

[0122] When assembling the insulating seat 410 provided in this embodiment, the auxiliary static spring 600 can be placed into the inner space of the insulating seat 410 from the opening 4141, and then the insulating seat 410 is rotated to install the insulating seat 410 in place. It is worth noting that since the cover 414 needs to be rotated during the assembly process, the extension state of the second plate 4143 in the plane perpendicular to the axis of the push rod 420 can be set to an arc shape, so as to save the space occupied by the cover 414, thereby improving the structural performance of the relay 10.

[0123] In one embodiment, the support frame 432 is connected to the push rod 420 and the insulating seat 410 by integral injection molding to further improve the integration of the push rod assembly 400, thereby optimizing the follow-up effect of each structural component and reducing the difficulty of assembly.

[0124] When preparing the various structural components of the push rod assembly 400 provided in the embodiment of the present invention, the insulating seat 410 can be formed by injection molding in two parts. Fig.12 As shown, the insulating seat 410 can be divided into a first structural member 412a and a second structural member 412b, wherein the first structural member 412a is formed in the first injection molding operation, and the second structural member 412b is formed in the second injection molding operation. Figures 19 to 22 shown.

[0125] It is worth noting that after the first injection molding process, the push rod 420, the auxiliary spring 440, the metal component 430 and the first structural member 412a form an integral structure. Afterwards, the second structural member 412b is prepared on the surface of the integral structure. The second structural member 412b covers at least a portion of the first structural member 412a to form a completed insulating seat 410 structure.

[0126] When the support frame 432 is provided, there are many possible structures of the support frame 432. As an example, please continue to refer to Figure 4 , Figures 6 to 8 In the structure shown, the support frame 432 includes a bottom plate 4321, a top plate 4322 and two side plates 4323 arranged opposite to each other. Along the axial direction of the push rod 420, the two side plates 4323 are located on the same side of the bottom plate 4321; the top plate 4322 is connected to the other end of the two side plates 4323 facing away from the bottom plate 4321 to form a frame structure with the bottom plate 4321 and the two side plates 4323; the frame structure is used to accommodate the active spring 310.

[0127] It is worth noting that, in the present embodiment, the bottom plate 4321 may be fixed to the insulating seat 410 ; meanwhile, the side plate 4323 may be an integral structure with the bottom plate 4321 , or the side plate 4323 may be an integral structure with the top plate 4322 .

[0128] In a specific example, at least a portion of the bottom plate 4321 is enclosed in the insulating seat 410; the two side plates 4323 cooperate with the top plate 4322 to form a U-shaped structure, and each side plate 4323 is connected to the bottom plate 4321 on the side facing away from the top plate 4322 to form a frame structure.

[0129] It is worth noting that please combine Figure 4 refer to Figure 6When the retaining wall structure 411 is lower than the connection position between the protrusion 413 and the bottom plate 4321, the side plate 4323 may be provided with an extension portion 43231, and the extension portion 43231 may extend in a direction perpendicular to the axial direction of the push rod 420 and be located above the top of the retaining wall structure 411. The extension portion 43231 may utilize the free space above the retaining wall structure 411 to prevent the product from being further increased in the axial direction of the push rod 420, thereby miniaturizing the product.

[0130] In one embodiment, please continue to refer to Figure 4 The elastic member 431 is located in the frame-shaped structure, and the elastic member 431 is connected to the active spring 310 to provide contact pressure to the active spring 310 .

[0131] It should be understood that, taking the example of at least a portion of the bottom plate 4321 being enclosed in the insulating seat 410 , at this time, along the axial direction of the push rod 420 , one end of the elastic member 431 abuts against the portion of the insulating seat 410 enclosing the bottom plate 4321 , and the other end abuts the active spring 310 against the top plate 4322 .

[0132] In a second aspect, an embodiment of the present invention provides a method for preparing a push rod assembly 400. The method comprises: forming an insulating seat 410 between a push rod 420 and a metal assembly 430 by an injection molding process, so that the push rod 420 and the metal assembly 430 are fixed to the insulating seat 410, and a retaining wall structure 411 is formed.

[0133] In the push rod assembly 400 provided in the embodiment of the present invention, the metal component 430, the push rod 420 and the insulating seat 410 are designed as an integrated whole, with fewer dimensional chains and high control accuracy, thus ensuring the consistency of the movement trajectories of the moving contact and the auxiliary moving contact 442.

[0134] Of course, the method for preparing the push rod assembly 400 can be used to prepare the push rod assembly 400 provided by any of the above technical solutions.

[0135] In a third aspect, an embodiment of the present invention further provides a method for preparing a push rod assembly 400. Figures 3 to 22 The structure shown is based on the preparation method provided in the embodiment of the present invention. The preparation method of the push rod assembly 400 includes:

[0136] By using an injection molding process, a first structural member 412a is formed between the push rod 420 and the metal component 430, so that the push rod 420 and the metal component 430 are fixed to the first structural member 412a. For example, Fig.16 As shown;

[0137] The injection molding process is used again to form a Fig.12 The second structural member 412b shown in FIG. Fig. 9As shown, the second structure member 412b and the first structure member 412a form an insulating seat 410; wherein the second structure member 412b cooperates with the first structure member 412a to form the insulating seat 410, and the second structure member 412b forms a retaining wall structure 411 of the insulating seat 410.

[0138] It should be noted that the method for preparing the push rod assembly 400 provided in the embodiment of the present invention can reduce the difficulty of preparation, improve the preparation efficiency, and improve the structural performance of the product.

[0139] In one embodiment, before forming the first structural member 412a between the push rod 420 and the metal component 430 by using an injection molding process, the preparation method further includes: providing an auxiliary dynamic spring 440, and wrapping the first structural member 412a around at least a portion of the auxiliary dynamic spring sheet 441 in the auxiliary dynamic spring 440.

[0140] It should be noted that in the preparation method provided by the embodiment of the present invention, the insulating seat 410, the metal component 430, the auxiliary dynamic spring 440 and the push rod 420 are designed as a whole, with fewer dimensional chains and high control accuracy, ensuring the consistency of the movement trajectory of the moving contact and the auxiliary moving contact 442. Moreover, the prepared insulating seat 410 and the auxiliary dynamic spring piece 441 move with each other, and there is no need to reserve the space for the auxiliary dynamic spring 440 to move, and the structure is compact. In addition, the number of parts is simplified, the cost is reduced, the assembly process is reduced, and the risk of non-conduction caused by scraping is avoided.

[0141] In one embodiment, when the second structure member 412 b is formed on the first structure member 412 a , the second structure member 412 b also forms a cover 414 of the insulating seat 410 , and the cover 414 covers the auxiliary moving contact 442 provided on the auxiliary moving spring 441 .

[0142] The push rod assembly 400 prepared by the preparation method provided by the embodiment of the present invention covers the auxiliary moving contact 442 through the cover 414. The cover 414 separates the auxiliary moving contact 442 from the moving contact. When the moving contact separates from the static contact 322 and an arc is generated, the cover 414 can form an isolation protection for the auxiliary moving contact 442 to prevent the arc from contaminating the auxiliary moving contact 442, thereby improving the structural performance of the relay 10.

[0143] Moreover, when the method for preparing the push rod assembly 400 provided by the embodiment of the present invention is applied, it is not necessary to provide a positioning opening 4141 for the mold to penetrate on the insulating seat 410, and it is not necessary to use a mold core to position the auxiliary dynamic spring 441. The push rod assembly 400 prepared by the method provided by the embodiment of the present invention can extend the creepage distance from the metal component 430 to the auxiliary dynamic spring 440, thereby improving the insulation level of the relay 10, and improving the structural performance and safety performance of the relay 10.

[0144] Finally, it should be noted that: it is understandable that the various embodiments / implementations provided by the present invention can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0145] In the embodiments of the invention, 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 clearly 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 embodiments of the invention can be understood according to the specific circumstances.

[0146] In the description of the embodiments of the invention, 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 embodiments of the invention 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 embodiments of the invention.

[0147] 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 invention 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.

[0148] The above are only preferred embodiments of the invention embodiments, and are not intended to limit the invention embodiments. For those skilled in the art, the invention embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the invention embodiments shall be included in the protection scope of the invention embodiments.

Claims

1. A push rod assembly, characterized in that: include: An insulating seat, a push rod and a metal component, wherein the metal component is provided on the side of the insulating seat facing away from the push rod along the axial direction of the push rod, and the insulating seat is provided with a retaining wall structure; along the radial direction of the push rod, the retaining wall structure is located on at least one side of the metal component to increase the creepage distance between the metal component and the push rod.

2. The push rod assembly according to claim 1, characterized in that: The insulating seat includes a main body and a protruding portion, one axial end of the push rod is covered in the main body, and the other end of the push rod extends from the main body; the protruding portion is located on the side of the main body facing away from the push rod, and the protruding portion protrudes from the main body in a direction away from the push rod; the metal component is fixed to the end of the protruding portion facing away from the main body.

3. The push rod assembly according to claim 2, characterized in that: The retaining wall structure extends from the main body toward a side facing away from the push rod, and along the radial direction of the push rod, a gap is formed between the retaining wall structure and the protruding portion on a side facing each other.

4. The push rod assembly according to claim 2, characterized in that: The retaining wall structure is arranged around the protruding portion.

5. The push rod assembly according to claim 2, characterized in that: Along the axial direction of the push rod, a surface of a side of the retaining wall structure facing away from the push rod is lower than a fixing position of the metal component and the protruding portion.

6. The push rod assembly according to any one of claims 2 to 5, characterized in that: The retaining wall structure is provided with a first creepage groove on at least one side along the radial direction of the push rod.

7. The push rod assembly according to claim 6, characterized in that: The retaining wall structure is provided with the first creepage groove on a side facing away from the protruding portion.

8. The push rod assembly according to claim 7, characterized in that: The retaining wall structure is an annular structure; the first creepage groove is arranged around the retaining wall structure.

9. The push rod assembly according to claim 6, characterized in that: There are multiple first creepage grooves located on the same side of the retaining wall structure, and the multiple first creepage grooves are spaced apart in the axial direction of the push rod.

10. The push rod assembly according to any one of claims 2 to 5, characterized in that: A second creepage groove is provided on the surface of the protruding portion.

11. The push rod assembly according to claim 10, characterized in that: The second creepage groove is arranged around the protruding portion.

12. The push rod assembly according to claim 11, characterized in that There are a plurality of second creepage grooves, and the plurality of second creepage grooves are spaced apart in the axial direction of the push rod.

13. The push rod assembly according to any one of claims 1 to 5, characterized in that: It also includes an auxiliary dynamic spring, the auxiliary dynamic spring includes an auxiliary dynamic spring piece and an auxiliary dynamic contact, at least a portion of the auxiliary dynamic spring piece is covered in the insulating seat, and the auxiliary dynamic contact is provided at a portion of the auxiliary dynamic spring piece extending out of the insulating seat; The retaining wall structure is located on at least one side of the metal component to increase the creepage distance between the metal component and the auxiliary dynamic spring.

14. The push rod assembly according to claim 13, characterized in that The auxiliary dynamic spring is connected to the push rod and the insulating seat by integral injection molding.

15. The push rod assembly according to claim 13, characterized in that The insulating seat further comprises a cover shell, which is connected to the insulating seat and covers the auxiliary moving contact.

16. The push rod assembly according to claim 15, characterized in that The cover shell covers the portion of the auxiliary moving spring extending from the insulating seat and the auxiliary moving contact.

17. The push rod assembly according to claim 15, characterized in that The cover shell is provided with an opening in a direction perpendicular to the axial direction of the push rod.

18. The push rod assembly according to any one of claims 1 to 5, characterized in that: The metal component includes an elastic member and a support frame, wherein the support frame is connected to the insulating seat and moves with the push rod; the elastic member is connected to the insulating seat and the active spring, and the elastic member is used to provide contact pressure to the active spring.

19. The push rod assembly according to claim 18, characterized in that The support frame is connected to the push rod and the insulating seat by integral injection molding.

20. The push rod assembly according to claim 19, characterized in that The support frame includes a bottom plate, a top plate and two side plates arranged opposite to each other. Along the axial direction of the push rod, the two side plates are located on the same side of the bottom plate; the top plate is connected to the other end of the two side plates facing away from the bottom plate to form a frame structure with the bottom plate and the two side plates; the frame structure is used to accommodate the active spring.

21. The push rod assembly according to claim 20, characterized in that The elastic member is located in the frame-shaped structure, and the elastic member is connected to the active spring to provide contact pressure to the active spring.

22. A relay, characterized in that: Comprising a push rod assembly as described in any one of claims 1-21.

23. A method for preparing a push rod assembly, characterized in that: include: An insulating seat is formed between the push rod and the metal component through an injection molding process, so that the push rod and the metal component are fixed to the insulating seat to form a retaining wall structure.

24. A method for preparing a push rod assembly, characterized in that: include: Using an injection molding process, a first structural member is formed between the push rod and the metal component, so that the push rod and the metal component are fixed to the first structural member; The injection molding process is used again to form a second structural member on the first structural member, so that the second structural member and the first structural member form an insulating seat; wherein the second structural member cooperates with the first structural member to form the insulating seat, and the second structural member forms a retaining wall structure of the insulating seat.

25. The method for preparing a push rod assembly according to claim 24, characterized in that: Before forming the first structural member between the push rod and the metal component by the injection molding process, the preparation method further comprises: An auxiliary dynamic spring is provided, and the first structural member wraps at least a portion of the auxiliary dynamic spring leaf in the auxiliary dynamic spring.

26. The method for preparing a push rod assembly according to claim 25, characterized in that: When the second structural member is formed on the first structural member, the second structural member also forms a cover shell of the insulating seat, and the cover shell covers the auxiliary moving contact arranged on the auxiliary moving spring.

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