Compact high-voltage relay

Abstract

The invention discloses a compact high-voltage relay, and relates to the technical field of relays, the compact high-voltage relay comprises a magnetic circuit mechanism, the magnetic circuit mechanism comprises a U-shaped yoke and a coil support located in the U-shaped yoke, the U-shaped yoke is provided with side plates forming two U-shaped walls and a bottom plate forming a U-shaped bottom, and a circuit board is arranged between the side plates and the coil support; the circuit board is provided with a first plug-in port plugged with the first plug-in terminal of the coil support, and the first plug-in terminal is used for electrically connecting the coil and the first plug-in port; the circuit board is provided with a second plug-in port electrically connected with the first plug-in port. The side plate is provided with an avoiding port corresponding to the second plug-in port. The second injection molding part is integrally provided with a second plug-in terminal in an injection molding manner, the second plug-in terminal is in plug-in connection with the second plug-in port and is electrically conducted, and the second injection molding part and the side plate are provided with an overlapped part at the avoiding port; wherein the lower side edge of the circuit board is provided with a supported surface which is in contact with the supporting surface at the bottom of the coil bracket, the supporting surface is provided with a receding opening, and the supported surface is provided with a limiting bulge which is matched with the receding opening to realize positioning and supporting.

Description

Technical Field

[0001] The present application relates to the technical field of relays, and in particular to a compact high-voltage relay. Background Art

[0002] With the continuous increase in market demand, the products in the contactor industry are also constantly being innovated and replaced, and the requirements for relays are becoming higher and higher. Especially in some specific fields, not only the voltage requirements for relays are high, but also the size requirements are small.

[0003] Existing high-voltage relays usually place the circuit board on the peripheral side of the magnetic circuit mechanism, causing the circuit board to occupy additional space around the magnetic circuit mechanism and requiring additional components to fix the circuit board, such as limit blocks, bolts, etc., which also causes the peripheral space of the magnetic circuit mechanism to be occupied, significantly increasing the size of the relay.

[0004] Therefore, in view of the above-mentioned defects, how to reduce the volume of the relay and make the relay structure more compact is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a compact high-voltage relay that can fully utilize the internal space of the magnetic circuit mechanism, effectively reduce the volume of the relay, and ensure a compact structure.

[0006] To achieve the above objectives, the present application provides a compact high-voltage relay, comprising:

[0007] A magnetic circuit mechanism includes a U-shaped yoke and a coil support located within the U-shaped yoke, the U-shaped yoke having side panels forming two U-shaped walls and a bottom panel forming a U-shaped bottom, a circuit board being provided between the side panels and the coil support, the circuit board being provided with a first plug-in interface for plugging into a first plug-in terminal of the coil support, the first plug-in terminal being used to electrically connect the coil and the first plug-in interface; the circuit board being provided with a second plug-in interface electrically connected to the first plug-in interface, and the side panel being provided with a relief opening corresponding to the second plug-in interface;

[0008] a second injection molded part integrally molded with a second plug terminal that is plugged into and electrically connected to the second plug interface, the second injection molded part and the side panel having an overlapping portion at the avoidance opening;

[0009] The lower side of the circuit board has a receiving surface in contact with the supporting surface of the bottom of the coil bracket, the supporting surface is provided with a clearance opening, and the receiving surface is provided with a limiting protrusion that cooperates with the clearance opening to achieve positioning support.

[0010] Optionally, it further comprises an insulating cover located on the upper side of the magnetic circuit mechanism, wherein the insulating cover has a cavity for contact operation;

[0011] The upper surface of the insulating cover is provided with a first injection molded part, an auxiliary static contact is plugged into the first injection molded part, and an auxiliary lead-out piece electrically connected to the auxiliary static contact is integrally injection molded on the first injection molded part;

[0012] The auxiliary lead-out plate includes two conductive plates, each of which has a first section integrally molded with the first injection molded part and a second section formed by bending the first section downward, and the second section extends downward parallel to the side wall of the insulating cover and the side plate.

[0013] Optionally, the second section and the second injection molded part are located on the same side, and a positioning frame is provided on the side panel with the avoidance opening. The positioning frame extends downward in a direction parallel to the side panel, and the second sections of the two conductive sheets are fixed on the positioning frame.

[0014] Optionally, a second positioning hole is provided on the outer side surface of the side plate, and a second positioning column is provided on the positioning frame to cooperate with the second positioning hole;

[0015] The positioning frame and the second injection molded part are separately provided, or the second injection molded part and the positioning frame or the second positioning column are integrally formed.

[0016] Optionally, it further comprises a shell and a base located at the bottom of the shell, wherein the shell and the base are fixedly connected to form a cavity structure for accommodating the insulating cover and the magnetic circuit mechanism;

[0017] The U-shaped yoke is placed on the base, one side wall of the shell abuts against the side plate, and the other side wall of the shell abuts against the positioning frame to limit the horizontal displacement of the U-shaped yoke and the positioning frame;

[0018] A substrate is clamped on the upper ends of the two side plates, the insulating cover is arranged on the substrate, the coil bracket is located in the cavity formed by the U-shaped yoke and the substrate, and the top wall of the shell abuts against the first injection molded part to limit the vertical displacement of the magnetic circuit mechanism and the insulating cover.

[0019] Optionally, a through hole is provided on the side wall of the housing for the second injection molded part to pass through, and one end of the second plug-in terminal facing away from the second plug interface is led out of the second injection molded part and is located outside the housing for connecting to an external control circuit.

[0020] The conductive sheet also has a third section formed by bending the second section and a fourth section formed by bending the third section. The third section is located on the upper surface of the second injection molded part and is led out of the shell through the through hole. The fourth section is used to connect to an external working circuit.

[0021] Optionally, a magnetic steel bracket is provided between the outer wall of the insulating cover and the side wall of the shell, and a magnetic steel is clamped between the magnetic steel bracket and the side wall of the insulating cover;

[0022] The bottom of the magnetic steel bracket is provided with a foot that abuts against the base plate, and the top of the magnetic steel bracket abuts against the first injection molded part to limit the vertical displacement of the magnetic steel bracket;

[0023] The magnetic steel brackets are located on both sides of the insulating cover, the outer wall of one magnetic steel bracket abuts against the side wall of the shell, and the outer wall of the other magnetic steel bracket abuts against the positioning frame to limit the horizontal displacement of the magnetic steel brackets.

[0024] Optionally, it further includes a main static contact, which passes through the top wall of the shell, the first injection molded part and the insulating cover in sequence, and the main static contact and the auxiliary static contact both extend into the working cavity of the insulating cover;

[0025] An active contact and an auxiliary moving contact which are transmission-connected to the magnetic circuit mechanism are provided in the working cavity of the insulating cover, so as to realize electrical conduction of the main static contact and the auxiliary static contact.

[0026] Optionally, in the front-to-back direction, the side walls on the front and rear sides of the second injection molded part do not exceed the side plate or the circuit board.

[0027] Optionally, the limiting protrusion abuts against the coil bracket of the outer circle of the clearance port in the horizontal direction, and the supporting surface is provided with a groove, which is used to provide space for accommodating welding points for the second plug interface and the second plug terminal.

[0028] The beneficial effect of the present application is that the present application realizes a nested layout of the magnetic circuit mechanism and the circuit board by integrating the circuit board into the narrow space between the side plate of the U-shaped yoke and the coil bracket, thereby making full use of the internal space of the U-shaped yoke; and replaces the transmission lateral wiring method through the upper and lower layer electrical connection design of the first plug interface and the second plug interface on the circuit board, thereby saving horizontal space.

[0029] In addition, by setting the avoidance opening, on the one hand, it can be ensured that the second injection molded part can reach the circuit board, so that the second plug terminal and the second plug interface are stably electrically connected; on the other hand, the avoidance opening can be used to make the second injection molded part as close as possible to the inside of the U-shaped yoke, thereby reducing the impact on the horizontal space. The cooperation between the limiting protrusion and the give-way opening can play a role in positioning the circuit board, and the cooperation between the two utilizes the space already occupied by the coil bracket and the circuit board itself in the horizontal and vertical directions. Therefore, the cooperation between the limiting protrusion and the give-way opening will not increase the occupied space. Compared with the traditional screw fixing method, it can also save a certain amount of installation space. It can be seen from the above effects that the present application effectively reduces the space occupied by the relay in the horizontal and vertical directions, and can also effectively save the installation space inside the relay, thereby ensuring the compactness of the overall structure of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0031] Figure 1 A schematic diagram of the explosion structure of a compact high-voltage relay provided in an embodiment of the present application;

[0032] Figure 2 A schematic diagram of the exploded structure of the magnetic circuit mechanism provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the assembly structure of the magnetic circuit mechanism and the insulating cover provided in an embodiment of the present application;

[0034] Figure 4 A schematic diagram of the front structure of the magnetic circuit mechanism and the insulating cover provided in an embodiment of the present application;

[0035] Figure 5 A cross-sectional view of a compact high-voltage relay provided in an embodiment of the present application;

[0036] Figure 6 for Figure 5 A in the middle is an enlarged structural diagram;

[0037] Figure 7 A schematic diagram of the three-dimensional structure of a compact high-voltage relay provided in an embodiment of the present application;

[0038] Figure 8 A schematic diagram of the housing structure provided in an embodiment of the present application;

[0039] Figure 9This is a schematic diagram of the matching structure of the first injection molded part and the conductive sheet of the compact high-voltage relay provided in an embodiment of the present application;

[0040] Figure 10 This is a schematic diagram of the conductive sheet structure provided in an embodiment of the present application.

[0041] In the figure: 1-U-shaped yoke; 2-coil bracket; 3-circuit board; 4-second injection molded part; 5-base plate; 6-positioning frame; 7-magnetic steel bracket; 8-main static contact; 9-auxiliary static contact; 10-insulating cover; 11-first injection molded part; 12-conductive sheet; 13-base; 14-coil; 15-magnet; 16-housing; 17-annular groove; 18-transmission rod; 19-active contact; 20-auxiliary moving contact;

[0042] 101-second positioning hole; 102-avoidance opening;

[0043] 201 - first plug-in terminal; 202 - supporting surface; 203 - clearance opening; 204 - groove;

[0044] 301-first plug interface; 302-second plug interface; 303-limiting protrusion; 304-trusted surface;

[0045] 401-second plug terminal;

[0046] 601-support surface; 602-first positioning column; 603-insulating partition; 604-second positioning column;

[0047] 701- leg;

[0048] 1101-bent edge; 1102-first mounting hole; 1103-column foot;

[0049] 1201-first section; 1202-second section; 1203-third section; 1204-fourth section; 1205-first positioning hole;

[0050] 1601-annular rib; 1602-second mounting hole. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper," "lower," "front," and "back" are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0054] Please refer to Figures 1 to 10 In this embodiment, a compact high-voltage relay is provided, including a magnetic circuit mechanism. The magnetic circuit mechanism includes a U-shaped yoke 1 and a coil support 2 located inside the U-shaped yoke 1. The U-shaped yoke 1 has side plates forming two U-shaped walls and a bottom plate forming a U-shaped bottom. A circuit board 3 is provided between one side plate and the coil support 2. The upper end of the circuit board 3 does not exceed the height of the side plate, and the circuit board 3 can be arranged parallel to the side plate.

[0055] The circuit board 3 is provided with a first plug interface 301 that plugs into the first plug terminal 201 of the coil support 2. One end of the first plug terminal 201 is electrically connected to the coil 14 on the coil support 2, and the other end is electrically connected to the first plug interface 301, thereby achieving electrical conduction between the coil 14 and the first plug interface 301. The circuit board 3 is also provided with a second plug interface 302 that is electrically connected to the first plug interface 301. The second plug interface 302 is located below the first plug interface 301.

[0056] In order to prevent the presence of the side panel from affecting the normal connection of the second plug-in port 302 with the terminal, a avoidance opening 102 corresponding to the second plug-in port 302 can be opened on the side panel, and the second plug-in terminal 401 integrally molded with the second injection molded part 4 can be inserted into the second plug-in port 302 through the avoidance opening 102, thereby realizing electrical conduction between the second plug-in terminal 401 and the coil 14.

[0057] It should be pointed out that when the second plug-in terminal 401 is inserted into the second plug-in port 302, the second injection molded part 4 should be located at the avoidance opening 102, so that the second injection molded part 4 and the side panel have an overlapping portion at the avoidance opening 102, so that the second injection molded part 4 can make full use of the thickness of the side panel itself and the internal space of the U-shaped yoke 1, reduce the space occupied by the second injection molded part 4 alone in the horizontal direction, and save horizontal space.

[0058] Furthermore, by integrating the circuit board 3 inside the U-shaped yoke 1 , the circuit board 3 is prevented from occupying the space outside the U-shaped yoke 1 , thereby making the structure of the relay more compact.

[0059] Among them, the circuit board 3 also has an overlapping portion with the coil bracket 2 in the vertical direction, that is, the lower side of the circuit board 3 has a supporting surface 304 that contacts the supporting surface 202 at the bottom of the coil bracket 2. The circuit board 3 can be placed as a whole on the supporting surface 202 at the bottom of the coil bracket 2, which can avoid the situation where the size of the U-shaped yoke 1 becomes larger due to the addition of the circuit board 3 between the side plate and the coil bracket 2. It should be noted that the coil bracket 2 usually has an upper plate and a lower plate, and the coil 14 is wound in the area between the upper plate and the lower plate. However, there is usually a certain gap between the coil 14 and the U-shaped yoke 1, and the circuit board 3 of the present application can be arranged in this gap, so it will not affect the original arrangement of the coil bracket 2 and the U-shaped yoke 1. Therefore, while ensuring that the size of the magnetic circuit mechanism remains unchanged, the circuit board 3 is integrated into the U-shaped yoke 1, which can effectively reduce the situation where the peripheral space of the magnetic circuit mechanism becomes larger due to the provision of the circuit board 3.

[0060] In addition, a clearance opening 203 is provided on the supporting surface 202, and a limiting protrusion 303 is provided on the supporting surface 304 of the circuit board 3. When the supporting surface 304 of the circuit board 3 contacts the supporting surface 202 of the coil bracket 2, the limiting protrusion 303 can be embedded in the clearance opening 203, thereby realizing positioning support for the circuit board 3.

[0061] As can be seen, the provision of the clearance opening 102 ensures that the second injection molded part 4 can reach the circuit board 3, ensuring a stable electrical connection between the second plug terminal 401 and the second plug interface 302. Furthermore, the clearance opening 102 allows the second injection molded part 4 to be positioned as close as possible to the interior of the U-shaped yoke 1, thereby minimizing the impact on the horizontal space. The cooperation between the limiting protrusion 303 and the clearance opening 203 serves to position the circuit board 3. Furthermore, the cooperation between the limiting protrusion 303 and the clearance opening 203 utilizes the space already occupied by the coil support 2 and the circuit board itself in the horizontal and vertical directions. Therefore, the cooperation between the limiting protrusion 303 and the clearance opening 203 does not increase the occupied space and can also save a certain amount of installation space compared to traditional screw fixing methods.

[0062] The relay also includes an insulating cover 10, which has a cavity for contact operation inside. A first injection molded part 11 is provided on the upper surface of the insulating cover 10, and an auxiliary static contact 9 is plugged into the first injection molded part 11. An auxiliary lead-out piece electrically connected to the auxiliary static contact 9 is integrally injection-molded on the first injection molded part 11.

[0063] It is understood that a socket can be provided on the first injection molded part 11, and the auxiliary static contact 9 can be plugged into the first injection molded part 11 through the socket. The auxiliary lead-out piece includes two conductive pieces 12, one end of each conductive piece 12 is located at the socket position of the first injection molded part 11, and realizes electrical conduction with the auxiliary static contact 9.

[0064] Furthermore, each conductive sheet 12 has a first segment 1201 integrally molded with the first molded part 11, and a second segment 1202 formed by bending the first segment 1201 downward. One end of the first segment 1201 is electrically connected to the auxiliary static contact 9, and the first molded part 11 has a bent edge 1101 extending along the second segment 1202 and integrally molded with a portion of the second segment 1202. In other words, the integral, uninterrupted molding of the first molded part 11 and the conductive sheet 12 includes the first segment 1201 and at least a portion of the second segment 1202.

[0065] It can be predicted that, based on the integral molding of the bent edge 1101 and part of the second section 1202, the exposed portion of the second section 1202 can be located as a whole on the lower side of the bent edge 1101, so that the exposed portion of the second section 1202 is not at the same height as the socket, which can effectively avoid the socket position from contaminating the auxiliary conductive sheet 12 during soldering.

[0066] Furthermore, the provision of the bent edge 1101 can also ensure that the second sections 1202 of the two conductive sheets 12 have a certain restraining effect at the upper portion, thereby improving the relative stability of the two conductive sheets 12 .

[0067] The insulating cover 10 is provided with a receiving structure for mounting the main static contacts 8. The receiving structure can be an assembly hole provided in the insulating cover 10, and the main static contacts 8 can be fixed in the assembly hole. The main static contacts 8 are grouped in pairs, and the insulating cover 10 is provided with at least one group of main static contacts 8. One end of the main static contact 8 extends into the insulating cover 10, and the other end has a lead terminal extending to the outside of the insulating cover 10. The lead terminal can be electrically connected to the main static contact 8 through the external circuit.

[0068] The first injection molded part 11 is provided with a first mounting hole 1102 corresponding to the accommodating structure, and the main static contact 8 can pass through the first mounting hole 1102 and the accommodating structure in sequence; wherein, the diameter of the first mounting hole 1102 is larger than the diameter of the accommodating structure, and the diameter of the first mounting hole 1102 is larger than the diameter of the lead-out end of the main static contact 8, so that an annular gap is formed between the first mounting hole 1102 and the lead-out end.

[0069] The shell 16 includes a top wall located above the first injection-molded part 11. The top wall and the insulating cover 10 cooperate to form a limit for the first injection-molded part 11 in the vertical direction. A second mounting hole 1602 is provided on the top wall. The second mounting hole 1602 corresponds to the first mounting hole 1102 in the height direction, that is, the main static contact 8 passes through the second mounting hole 1602, the first mounting hole 1102 and the accommodating structure in sequence.

[0070] An annular rib 1601 is provided on the outer ring of the second mounting hole 1602, extending toward the interior of the first mounting hole 1102. An annular groove 17 is formed around the outer circumference of the lead-out terminal of the main static contact 8 between the annular rib 1601 and the lead-out terminal. It can be seen that the provision of the annular rib 1601 allows, on the one hand, glue to be dispensed directly into the annular groove 17 formed between the annular baffle and the lead-out terminal, reducing the glue dispensing process and simplifying the operation. On the other hand, the size of the annular spacer formed between the first mounting hole 1102 and the lead-out terminal can be reduced. In other words, the amount of glue that can be accommodated in the annular groove 17 is significantly smaller than the amount of glue that can be accommodated in the annular spacer, thereby reducing the total amount of glue dispensed.

[0071] The lower side of the annular rib 1601 abuts the upper surface of the insulating cover 10, while the upper side of the annular rib 1601 is connected to the top wall of the housing 16 or is integrally formed with the top wall. This can reduce the radial outward overflow of the colloid within the annular groove 17, so that the colloid can be concentrated in the annular groove 17, ensuring the insulation of the outer periphery of the lead end of the main static contact 8. A sealing member, such as a sealing gasket, can be provided on the upper surface of the insulating cover 10, and the lower side of the annular rib 1601 can abut the sealing member, thereby forming a sealed annular groove 17 to prevent the colloid from overflowing.

[0072] Among them, the annular rib 1601 is coaxially arranged with the second mounting hole 1602, or the annular rib 1601, the second mounting hole 1602 and the first mounting hole 1102 are coaxially arranged, so that the ring width at each position on the annular groove 17 remains consistent, so that the annular groove 17 on the periphery of the lead-out end of the main static contact 8 has a consistent ring width. After the glue dripping is completed, it can be ensured that the periphery of the lead-out end of the main static contact 8 has the same insulation thickness, avoiding the situation of poor local insulation effect caused by differences in insulation thickness.

[0073] On this basis, the inner diameter of the annular rib 1601 can be the same as the diameter of the second mounting hole 1602, that is, the inner wall of the second mounting hole 1602 and the inner wall of the annular rib 1601 are axially coplanar, making it easier for the colloid to enter and reach the bottom of the annular groove 17 during glue dripping, thereby making it easier for the colloid to fill the annular groove 17. In addition, the inner diameter of the annular rib 1601 can also be larger than the diameter of the second mounting hole 1602, that is, the inner wall of the second mounting hole 1602 and the inner wall of the annular rib 1601 are not axially coplanar, so that when glue dripping, the diameter of the colloid in the annular groove 17 is larger than the diameter of the second mounting hole 1602, so that the second mounting hole 1602 has an axial limiting effect on the colloid, ensuring the stability of the colloid, and further improving the insulation effect of the outer periphery of the lead end of the main static contact 8.

[0074] In some embodiments, the diameter of the first mounting hole 1102 can be equal to the outer ring diameter of the annular rib 1601. At this time, after the annular rib 1601 is inserted into the first mounting hole 1102, the inner wall of the first mounting hole 1102 abuts against the outer wall of the annular rib 1601, so that the annular rib 1601 has a limiting effect on the first injection molded part 11 in the horizontal direction, thereby avoiding failure of the electrical plug-in part caused by horizontal displacement of the first injection molded part 11.

[0075] The diameter of the first mounting hole 1102 can also be larger than the outer ring diameter of the annular rib 1601, thereby forming an assembly gap between the inner wall of the first mounting hole 1102 and the outer wall of the annular rib 1601. During assembly, the existence of the assembly gap makes it easier to connect the annular rib 1601 with the first mounting hole 1102. At the same time, the assembly gap is small in size, which can also enable the annular rib 1601 to play a certain horizontal limiting role on the first injection molded part 11, thereby avoiding excessive displacement of the first injection molded part 11.

[0076] The above embodiment indicates that the inner ring of annular rib 1601 is constructed as a cylindrical hollow structure. In some embodiments, the inner ring of annular rib 1601 can also be constructed as a truncated cone-shaped hollow structure that is narrow at the top and wide at the bottom. The upper base diameter of the truncated cone-shaped hollow structure is the same as the diameter of second mounting hole 1602, and the lower base diameter is larger than the diameter of second mounting hole 1602, thereby forming an inclined inner wall structure of annular rib 1601. During dispensing, the glue will produce an outer inclined surface within the annular groove 17 that adapts to the inner wall of annular rib 1601, thereby achieving wedge-shaped fit between the glue and annular rib 1601, ensuring axial positional fit between annular rib 1601 and the glue.

[0077] In some embodiments, the second section 1202 of the conductive sheet 12 and the second injection molded part 4 are located on the same side, or the second section 1202 of the conductive sheet 12 and the second injection molded part 4 are both located on one side of the side panel with the avoidance opening 102, and a positioning frame 6 is provided on the side panel with the avoidance opening 102, and the positioning frame 6 extends downward in a direction parallel to the side panel, and the second sections 1202 of the two conductive sheets 12 can be fixed on the positioning frame 6, thereby realizing the positioning support of the second section 1202.

[0078] The second sections 1202 of the two conductive sheets 12, which do not have the bent edges 1101, are each fixed to the positioning frame 6. Specifically, the second section 1202 located below the bent edges 1101 is fixed to the positioning frame 6, and the positioning frame 6 has an expansion space for the second section 1202 to deform. Compared to the technical solution in which the second section 1202 is simultaneously injection-molded, the conductive sheet 12 of the present application has only the first section 1201 and part of the second section 1202 integrally injection-molded with the first injection-molded part 11, while the remaining portion is independent. Therefore, if one conductive sheet 12 deforms, it will not affect the working performance of the other conductive sheet 12, thereby avoiding mutual interference.

[0079] Because both the positioning frame 6 and the second section 1202 extend downward, and the positioning plate can be attached to the side panel surface, horizontal space is minimized, ensuring the compactness of the relay structure. Furthermore, the positioning frame 6 and the second section 1202 extend in the same direction, and one side of the positioning frame 6 has a support surface 601 that contacts the second sections 1202 of the two conductive sheets 12. When the second sections 1202 of the conductive sheets 12 are positioned on the positioning frame 6, they can mate with the support surface 601 of the positioning frame 6, providing stable support for the conductive sheets 12.

[0080] A positioning structure is provided on the support surface 601 , and the positioning structure can cooperate with the second section 1202 of the conductive sheet 12 to constrain the second section 1202 on the support surface 601 to prevent loosening or shaking.

[0081] The above-mentioned positioning structure includes a first positioning column 602 provided on the positioning frame 6, and a first positioning hole 1205 cooperating with the first positioning column 602 is provided on the second section 1202 of the conductive sheet 12. When the second section 1202 of the conductive sheet 12 is assembled on the positioning frame 6, the first positioning column 602 can be inserted into the first positioning hole 1205, thereby realizing the positioning function of the conductive sheet 12.

[0082] An insulating partition 603 is also provided on the support surface 601. The insulating partition 603 is located between the second sections 1202 of the two conductive sheets 12, and the insulating partition 603 extends in a direction away from the support surface 601, so that the extended end exceeds the side wall of the second section 1202 away from the support surface 601, thereby improving the insulation effect of the two conductive sheets 12 and preventing arc discharge and short circuit accidents in a high-voltage environment.

[0083] It should be noted that, on the one hand, the insulating partition 603 can extend on the support surface 601 in the direction of the second section 1202 to ensure that there is a sufficiently long insulation length between the second sections 1202 of the two conductive sheets 12; on the other hand, it extends in a direction away from the support surface 601 or perpendicular to the support surface 601 to ensure that the second sections 1202 of the two conductive sheets 12 have a sufficiently long insulation height, thereby ensuring the insulation effect of the two second sections 1202.

[0084] In some embodiments, one side of the second section 1202 can be in contact with the insulating partition 603, so that the insulating partition 603 can also play a certain positioning role on the conductive sheet 12, thereby ensuring the stability of the conductive sheet 12; the second section 1202 can also be spaced apart from the insulating partition 603, so that there is a certain expansion space between the second section 1202 and the insulating partition 603. Even if the second section 1202 is deformed, the deformation amount will not directly affect the positioning frame 6 under the action of the expansion space, and there will be no problem of affecting the working performance of another conductive sheet 12.

[0085] In addition, since the cooperation between the first positioning column 602 and the first positioning hole 1205 has positioned the second section 1202 of the conductive sheet 12 on the positioning frame 6, and cooperates with the positioning effect of the first injection molded part 11 on the conductive sheet 12, even if the other side walls of the outer periphery of the second section 1202 (except the other side walls in contact with the support surface 601) are not in contact with the positioning frame 6, it still has good stability. Therefore, the present application can set the side wall of the second section 1202 away from the insulating partition 603 to be non-contact with the positioning frame 6, and the side wall of the second section 1202 away from the support surface 601 to be non-contact with the positioning frame 6, so that the positioning frame 6 provides sufficient expansion space for the outer periphery of the second section 1202 to avoid interference with the positioning frame 6 when the conductive sheet 12 is deformed, affecting the positioning effect of the positioning frame 6, and affecting the working performance of the other conductive sheet 12.

[0086] The auxiliary static contact 9 can be connected to the first injection molded part 11 in the middle of the first injection molded part 11, or on a side of the first injection molded part 11 away from the second section 1202. This allows the insertion hole on the first injection molded part 11 to be located farther from the exposed area of ​​the second section 1202, thereby preventing conductive contamination during soldering. The bent edge 1101 is located at the end of the first injection molded part 11 and bends and extends toward the bottom of the first injection molded part 11, thereby ensuring that the exposed area of ​​the second section 1202 is located on the bottom of the first injection molded part 11.

[0087] A second positioning hole 101 is provided on the side plate of the U-shaped yoke 1, and a second positioning column 604 is provided on the positioning frame 6 to cooperate with the second positioning hole 101. The positioning frame 6 can be fixedly connected to the U-shaped yoke 1 through the cooperation between the second positioning column 604 and the second positioning hole 101, thereby ensuring the positioning effect of the positioning frame 6.

[0088] The second injection molded part 4 can be separately provided with the positioning frame 6 or can be integrally formed with the positioning frame 6, thereby further enhancing the positioning effect of the second injection molded part 4 through the positioning frame 6; specifically, the second injection molded part 4 can be integrally formed with the positioning frame 6 or the second positioning column 604.

[0089] A base 13 is provided at the bottom of the shell 16 , and the shell 16 is fixedly connected to the base 13 to form a cavity structure for accommodating the insulating cover 10 and the magnetic circuit mechanism; the form of fixed connection includes but is not limited to clamping, bolt connection, etc.

[0090] The U-shaped yoke 1 can be placed on the base 13, one side wall of the shell 16 abuts against the side plate of the U-shaped yoke 1, and the other opposite side wall of the shell 16 abuts against the positioning frame 6, thereby limiting the displacement of the U-shaped yoke 1 and the positioning frame 6 in the horizontal direction.

[0091] A base plate 5 is provided at the upper end of the U-shaped yoke 1, and the base plate 5 can be clamped with the two side plates of the U-shaped yoke 1. The insulating cover 10 is provided on the base plate 5, and the coil bracket 2 is located in the cavity formed by the U-shaped yoke 1 and the base plate 5. Since the top wall of the shell 16 abuts against the first injection molded part 11 through the annular rib 1601, the displacement of the magnetic circuit mechanism and the insulating cover 10 can be limited in the vertical direction, thereby ensuring the structural stability of the relay.

[0092] A through hole is provided on the housing 16 for the second injection molded part 4 to pass through. The second plug terminal 401 is led out of the second injection molded part 4 at one end away from the second plug interface 302 and is located outside the housing 16. It can be used to connect an external control circuit to control the coil 14 to generate a magnetic field.

[0093] Any conductive sheet 12 also has a third section 1203 formed by bending the second section 1202 and a fourth section 1204 formed by bending the third section 1203. The third section 1203 is parallel to the first section 1201 and is located on the upper surface of the second injection molded part 4. It can be led out of the shell 16 together with the second injection molded part 4 along with the through hole; the fourth section 1204 is parallel to the second section 1202 and can be connected to an external circuit.

[0094] The insulating cover 10 can be a ceramic cover made of ceramic material, and a magnetic steel bracket 7 is provided on the outside of the ceramic cover. A magnet 15 is clamped between the magnetic steel bracket 7 and the side wall of the insulating cover 10. The specific setting method and working principle of the magnetic steel bracket 7 and the magnet 15 will not be repeated here, and reference can be made to the existing technology.

[0095] Column feet 1103 extending downward are provided on two opposite sides of the first injection molded part 11. The column feet 1103 can form a limiting fit with the upper edge of the magnetic steel bracket 7 and / or the magnetic steel 15. The limiting fit here includes limiting abutment, limiting clamping, plug-in, etc., and the forms of limiting clamping include but are not limited to snap connection, bonding, etc., which will not be repeated here one by one, and all fall within the scope of protection of this application.

[0096] A foot 701 is provided at the bottom of the magnetic steel bracket 7, which abuts against the base plate 5. Since the top of the magnetic steel bracket 7 abuts against the column foot 1103 of the first injection molded part 11, and the upper end of the first injection molded part 11 abuts against the annular retaining edge 1601 of the shell 16, the vertical displacement of the magnetic steel bracket 7 can be limited in this way.

[0097] The magnetic steel brackets 7 are distributed on two opposite sides of the insulating cover 10. The outer wall of one magnetic steel bracket 7 abuts against the side wall of the shell 16, and the outer wall of the other magnetic steel bracket 7 abuts against the positioning frame 6. When the positioning frame 6 is horizontally restricted, the magnetic steel bracket 7 can also be horizontally limited, thereby ensuring the positioning effect of the two magnetic steel brackets 7 in the horizontal direction.

[0098] Among them, the main static contact 8 and the auxiliary static contact 9 are both extended into the working cavity of the insulating cover 10, and the active contact 19 and the auxiliary moving contact 20 connected to the magnetic circuit mechanism are provided in the working cavity of the insulating cover 10, thereby realizing the electrical conduction of the main static contact 8 and the electrical conduction of the auxiliary static contact 9.

[0099] Furthermore, the magnetic circuit mechanism also includes an axial cavity provided on the coil support 2 and a transmission rod 18 movably provided in the axial cavity. One end of the transmission rod 18 is connected to a magnet, and the other end passes through the substrate 5 and extends into the insulating cover 10. A lifting bracket is provided at the end, and the active contact 19 and the auxiliary moving contact 20 are provided on the lifting bracket; the magnet moves toward the insulating cover 10 in the magnetic field generated by the coil 14, thereby driving the transmission rod 18 to move toward the main static contact 8 (auxiliary static contact 9), and then the transmission rod 18 pushes the active contact 19 (auxiliary moving contact 20) on the lifting bracket to move toward the main static contact 8 (auxiliary static contact 9), thereby realizing electrical conduction of the main static contact 8 and the auxiliary static contact 9.

[0100] Considering that the active contact 19 should be separated from the main static contact 8 after the magnetic field generated by the coil 14 disappears, an elastic member can be sleeved on the outer periphery of the transmission rod 18, and the elastic force of the elastic member can be used to reset the transmission rod 18 and the magnet, so that the active contact 19 and the auxiliary moving contact 20 are ready for the next action.

[0101] In some embodiments, in the front-to-back direction, the side walls of the second injection-molded part 4 on the front and rear sides do not exceed the U-shaped yoke 1 or the circuit board 3, thereby utilizing the size of the U-shaped yoke 1 and the circuit board 3 itself to reduce the volume impact of the second injection-molded part 4 on the front-to-back direction of the relay, thereby improving the compactness of the relay.

[0102] Furthermore, the limiting protrusion 303 can abut against the coil support 2 on the outer ring of the clearance opening 203 in the horizontal direction, thereby ensuring the stability of the circuit board 3 when the coil support 2 is limited and the first plug interface 301 is soldered to the first plug terminal 201. At the same time, a groove 204 can be provided on the supporting surface 202 of the coil support 2 to provide space for the second plug interface 302 and the second plug terminal 401 to accommodate solder joints, thereby saving horizontal space.

[0103] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0104] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core ideas of this application. It should be noted that for those skilled in the art, without departing from the principles of this application, various improvements and modifications can be made to this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A compact high-voltage relay, characterized in that: include: A magnetic circuit mechanism comprises a U-shaped yoke (1) and a coil support (2) located inside the U-shaped yoke (1), the U-shaped yoke (1) having side plates forming two U-shaped walls and a bottom plate forming a U-shaped bottom, a circuit board (3) being provided between the side plates and the coil support (2), the circuit board (3) being provided with a first plug interface (301) plugged into a first plug terminal (201) of the coil support (2), the first plug terminal (201) being used to electrically connect a coil (14) and the first plug interface (301); the circuit board (3) being provided with a second plug interface (302) electrically connected to the first plug interface (301), the side plate being provided with a relief opening (102) corresponding to the second plug interface (302); A second injection molded part (4) is integrally molded with a second plug terminal (401) that is plugged into and electrically connected to the second plug interface (302), and the second injection molded part (4) and the side plate have an overlapping portion at the avoidance opening (102); The lower side of the circuit board (3) has a receiving surface (304) in contact with the supporting surface (202) at the bottom of the coil bracket (2), the supporting surface (202) is provided with a clearance opening (203), and the receiving surface (304) is provided with a limiting protrusion (303) that cooperates with the clearance opening (203) to achieve positioning support.

2. The compact high-voltage relay according to claim 1, characterized in that It also includes an insulating cover (10) located on the upper side of the magnetic circuit mechanism, the insulating cover (10) having a cavity for contact operation; The upper surface of the insulating cover (10) is provided with a first injection molded part (11), an auxiliary static contact (9) is plugged into the first injection molded part (11), and an auxiliary lead-out piece electrically connected to the auxiliary static contact (9) is integrally injection molded on the first injection molded part (11); The auxiliary lead-out plate comprises two conductive plates (12), the conductive plate (12) having a first section (1201) integrally molded with the first injection molded part (11) and a second section (1202) formed by bending the first section (1201) downward, the second section (1202) extending downwardly parallel to the side wall of the insulating cover (10) and the side plate.

3. The compact high-voltage relay according to claim 2, characterized in that: The second section (1202) and the second injection molded part (4) are located on the same side, and a positioning frame (6) is provided on the side panel having the avoidance opening (102), the positioning frame (6) extending downward in a direction parallel to the side panel, and the second sections (1202) of the two conductive sheets (12) are fixed on the positioning frame (6).

4. The compact high-voltage relay according to claim 3, characterized in that: A second positioning hole (101) is provided on the outer side surface of the side plate, and a second positioning column (604) is provided on the positioning frame (6) to cooperate with the second positioning hole (101); The positioning frame (6) and the second injection molded part (4) are arranged separately, or the second injection molded part (4) and the positioning frame (6) or the second positioning column (604) are integrally formed.

5. The compact high-voltage relay according to claim 3, characterized in that: It also includes a shell (16) and a base (13) located at the bottom of the shell (16), wherein the shell (16) and the base (13) are fixedly connected to form a cavity structure for accommodating the insulating cover (10) and the magnetic circuit mechanism; The U-shaped yoke (1) is placed on the base (13), one side wall of the shell (16) abuts against the side plate, and the other side wall of the shell (16) abuts against the positioning frame (6) to limit the horizontal displacement of the U-shaped yoke (1) and the positioning frame (6); A base plate (5) is clamped to the upper ends of the two side plates, the insulating cover (10) is provided on the base plate (5), the coil bracket (2) is located in a cavity formed by the U-shaped yoke (1) and the base plate (5), and the top wall of the shell (16) abuts against the first injection molded part (11) to limit the vertical displacement of the magnetic circuit mechanism and the insulating cover (10).

6. The compact high-voltage relay according to claim 5, characterized in that: The side wall of the housing (16) is provided with a through hole for the second injection molded part (4) to pass through, and the end of the second plug terminal (401) facing away from the second plug interface (302) is led out of the second injection molded part (4) and is located outside the housing (16) for connecting to an external control circuit; The conductive sheet (12) further comprises a third section (1203) formed by bending the second section (1202) and a fourth section (1204) formed by bending the third section (1203). The third section (1203) is located on the upper surface of the second injection molded part (4) and is led out of the housing (16) through the through hole. The fourth section (1204) is used for connecting to an external working circuit.

7. The compact high-voltage relay according to claim 5, characterized in that: A magnetic steel bracket (7) is provided between the outer wall of the insulating cover (10) and the side wall of the shell (16), and a magnetic steel (15) is clamped between the magnetic steel bracket (7) and the side wall of the insulating cover (10); The bottom of the magnetic steel bracket (7) is provided with a bracket foot (701) that abuts against the base plate (5), and the top of the magnetic steel bracket (7) abuts against the first injection molded part (11) to limit the vertical displacement of the magnetic steel bracket (7); The magnetic steel bracket (7) is located on both sides of the insulating cover (10), the outer wall of one magnetic steel bracket (7) abuts against the side wall of the shell (16), and the outer wall of the other magnetic steel bracket (7) abuts against the positioning frame (6), so as to limit the horizontal displacement of the magnetic steel bracket (7).

8. The compact high-voltage relay according to claim 5, characterized in that: It also includes a main static contact (8), the main static contact (8) sequentially passing through the top wall of the housing (16), the first injection molded part (11) and the insulating cover (10), and the main static contact (8) and the auxiliary static contact (9) both extend into the working cavity of the insulating cover (10); An active contact (19) and an auxiliary moving contact (20) which are transmission-connected to the magnetic circuit mechanism are provided in the working cavity of the insulating cover (10) to achieve electrical conduction of the main static contact (8) and the auxiliary static contact (9).

9. The compact high-voltage relay according to claim 1, characterized in that: In the front-to-back direction, the side walls of the second injection molded part (4) on both the front and rear sides do not extend beyond the side panels or the circuit board (3).

10. The compact high-voltage relay according to claim 1, characterized in that The limiting protrusion (303) abuts against the coil support (2) on the outer ring of the clearance opening (203) in the horizontal direction, and the supporting surface (202) is provided with a groove (204), and the groove (204) is used to provide space for accommodating welding points for the second plug interface (302) and the second plug terminal (401).

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