Relay

Abstract

The relay comprises a ceramic cover, an auxiliary static contact fixedly arranged on the ceramic cover, a coil assembly arranged below the ceramic cover and a PCB used for controlling the coil assembly to work, and the coil assembly is provided with a winding terminal; the relay further comprises an auxiliary leading-out terminal correspondingly connected with the auxiliary static contact, a coil leading-out terminal electrically connected with the winding terminal through the PCB and an insulating part used for fixedly holding the auxiliary leading-out terminal and the coil leading-out terminal, and the insulating part is integrally formed through injection molding. According to the relay, the insulating part used for fixedly holding the auxiliary leading-out terminal and the coil leading-out terminal is integrally formed through injection molding, so that forming and assembling are facilitated, the manufacturing procedures are reduced, the manufacturing efficiency is improved, the manufacturing cost is reduced, the structural strength is enhanced, and the relay is more compact in structure and smaller in size.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic switch devices, and in particular to a relay. Background Art

[0002] Relay is a switch device that controls high current with low current and has protective properties. It is widely used in new energy vehicles, charging piles, photovoltaic power generation, energy storage systems and other fields. In the relay, there are usually two sets of contacts: one set is the main contact, which drives the active reed to move and bridge the two main contacts through the low-voltage electromagnetic drive part to achieve the main circuit conduction; the other set is the auxiliary contact, the auxiliary moving reed follows the movement of the active reed and bridges the two auxiliary contacts, and is used as an auxiliary logic switch of the circuit control system to determine the working state of the relay and monitor the adhesion failure of the main circuit contacts.

[0003] A relay with auxiliary contacts is usually provided with a group of auxiliary lead terminals for connecting the auxiliary contacts and a group of coil lead terminals for connecting the coil. At present, the structure of the auxiliary lead terminals and the coil lead terminals in the existing relays is relatively complex, and multiple turning points need to be processed, and more materials are used. In addition, the auxiliary lead terminals and the coil lead terminals cannot be injection molded together due to their complex structure, and can only be injection molded independently of each other, which takes up more space, resulting in a very non-compact internal structure of the relay, a large volume, and a cumbersome assembly process. Therefore, it is necessary to improve the existing technology to overcome the defects in the existing technology. Summary of the invention

[0004] The problem to be solved by the present invention is to provide a relay to overcome the defects of the existing relays that the relay structure is not compact enough, the volume is large and the assembly process is complicated due to the complex lead-out structure of the coil and the auxiliary static contact.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a relay, comprising: a ceramic cover, an auxiliary static contact fixed to the ceramic cover, a coil group arranged below the ceramic cover and a PCB board for controlling the operation of the coil group, wherein the coil group is provided with a winding terminal; the relay also includes an auxiliary lead-out terminal correspondingly connected to the auxiliary static contact, a coil lead-out terminal electrically connected to the winding terminal through the PCB board, and an insulating member for holding the auxiliary lead-out terminal and the coil lead-out terminal, wherein the insulating member is integrally injection molded.

[0006] As a further improvement of the present invention, the auxiliary lead-out terminal is provided with a plug-in end protruding from the insulating member, and the coil lead-out terminal is provided with a plug-in end protruding from the insulating member. The plug-in end of the auxiliary lead-out terminal and the plug-in end of the coil lead-out terminal are arranged side by side and define the plug-in ends, and the plane on which they are located is the first plane. The PCB board is arranged parallel to the first plane and the PCB board and the insulating member are located on the same side of the relay at the same time.

[0007] As a further improvement of the present invention, the insulating member is provided with a horizontal insulating base, and the plug-in ends of the auxiliary lead-out terminals and the plug-in ends of the coil lead-out terminals are both led out vertically upward from the top of the insulating base.

[0008] As a further improvement of the present invention, the auxiliary lead terminal is further provided with a horizontal first section and a vertical second section, the first section is connected between the plug-in end of the auxiliary lead terminal and the second section and is completely wrapped by the insulating base;

[0009] The second section vertically extends from one end of the first section, and the insulating member is further provided with a vertical insulating reinforcement portion integrally formed with the insulating base, wherein the insulating reinforcement portion is Y-shaped and wraps at least a portion of the second section.

[0010] As a further improvement of the present invention, the insulating reinforcement portion includes a base portion connected to the insulating base and two branches extending upwardly from the base portion, and the two branches are symmetrically arranged along the center line.

[0011] As a further improvement of the present invention, the two branches include an inclined portion extending obliquely from the base toward a direction away from each other and a vertical portion extending vertically upward from the inclined portion;

[0012] The auxiliary lead-out terminal is also provided with an auxiliary lead-out connection end integrally connected to the second section. The auxiliary lead-out connection end is vertically bent and extended from the second section toward the top of the ceramic cover and is fixedly connected to the auxiliary static contact. The vertical portion does not cover the auxiliary lead-out connection end.

[0013] As a further improvement of the present invention, the relay is provided with two auxiliary static contacts, two auxiliary lead-out terminals corresponding to the two auxiliary static contacts, and two coil lead-out terminals fixed to the insulating member, the insulating reinforcement portion is arranged corresponding to the second section, and the two coil lead-out terminals are symmetrically arranged on both sides of the two auxiliary lead-out terminals.

[0014] As a further improvement of the present invention, the coil lead-out terminal is also provided with a horizontal third section and a horizontal fourth section, the third section is connected between the plug-in end of the coil lead-out terminal and the fourth section and is completely wrapped by the insulating base; the fourth section of the coil lead-out terminal extends out of the insulating base.

[0015] As a further improvement of the present invention, one end of the fourth section protruding from the insulating base is horizontally bent to form a coil lead-out welding end; the PCB board is vertically arranged on one side of the coil group, and the top of the PCB board is provided with two convex plate portions protruding upward from the insulating base and located on the outside of both ends of the insulating base, and the coil lead-out welding end is inserted into the convex plate portion and electrically connected thereto.

[0016] As a further improvement of the present invention, the relay further comprises a magnetic pole piece, the magnetic pole piece is fixed to the bottom of the ceramic cover, and the insulating base is mounted on the magnetic pole piece;

[0017] A boss portion is provided in the middle of the magnetic pole piece facing the PCB board, and a dovetail groove is provided on the boss portion; a bracket is provided at the bottom of the insulating base, and a dovetail platform is provided at the bottom of the bracket, the bracket abuts against the boss portion, and the dovetail platform is plugged into and matched with the dovetail groove.

[0018] As a further improvement of the present invention, the coil group is arranged below the magnetic pole piece, and comprises a coil frame and at least one coil wound on the coil frame, and the winding terminal is arranged on the coil frame and electrically connected to the coil pin of the coil;

[0019] The coil frame is provided with a lower plate portion at the bottom of the coil, and the bottom end of the PCB board is supported and fixed on the lower plate portion;

[0020] The top end of the PCB board abuts against the insulating base.

[0021] As a further improvement of the present invention, a limiting groove is provided on one side of the lower plate portion, a first protrusion is provided in the limiting groove, the bottom end of the PCB board is inserted into the limiting groove, and the first protrusion is plugged and matched with a first groove provided at the bottom end of the PCB board;

[0022] A limiting plate parallel to the PCB board is provided at the bottom of the insulating base, and a second protrusion is provided on a side of the limiting plate facing the PCB board. The PCB board is abutted against the side of the limiting plate provided with the second protrusion, and the second protrusion is plugged into and matched with a second groove provided on the top of the PCB board.

[0023] As a further improvement of the present invention, the coil skeleton is provided with an upper disk portion located at the top of the coil, and the winding terminal is horizontally led outward from one side of the upper disk portion toward the PCB board and is electrically connected to the PCB board; an insulating plate is extended upward from the edge of one side of the upper disk portion, and the insulating plate is located between the magnetic pole piece and the PCB board.

[0024] As a further improvement of the present invention, the relay also includes a yoke, which is U-shaped and has two opposite side walls, and the two side walls are fixedly connected to the magnetic pole pieces; the PCB board is arranged between the two side walls and is distributed vertically with the two side walls.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention provides a relay, which is used to hold the auxiliary lead-out terminal and the coil lead-out terminal by integral injection molding of the insulating member, so as to facilitate molding and assembly, reduce the preparation process, improve the preparation efficiency, reduce the preparation cost, enhance the structural strength, and make the relay structure more compact and smaller in size;

[0027] 2. The present invention arranges the PCB board, the auxiliary lead terminal, the coil lead terminal and the insulating member on the same side, and makes the first plane where the plug-in ends of the auxiliary lead terminal and the coil lead terminal are located parallel to the PCB board, thereby simplifying the structure of the auxiliary lead terminal and the coil lead terminal, and connecting them as a whole through the insulating member, making the internal structure of the relay compact, and realizing the miniaturization design of the relay volume;

[0028] 3. The present invention arranges the coil lead-out terminals symmetrically on both sides of the auxiliary lead-out terminals, and the fourth section of the coil lead-out terminal is led outward from both ends of the insulating base and bent to form a coil lead-out welding end, which is directly welded to the PCB board to achieve electrical connection. This technical solution can simplify the structure of the coil lead-out terminal, and does not require multiple turning designs on the coil lead-out terminal, making the wiring neat, easy to process, saving materials, reducing costs, and easy to achieve integration with the auxiliary lead-out terminal by injection molding, which further makes the structure of the relay more compact;

[0029] 4. The present invention provides a limiting structure between the insulating member and the magnetic pole piece, and between the PCB board, the coil frame and the insulating member, so that the assembly is very convenient, the installation is reliable, and accurate positioning can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a three-dimensional diagram of a relay of the present invention;

[0031] Figure 2 It is a three-dimensional diagram of the coil assembly, yoke, PCB board and connector in the relay of the present invention;

[0032] Figure 3 It is a three-dimensional diagram of the auxiliary lead terminal, the coil lead terminal, the insulating member and the PCB board in the relay of the present invention;

[0033] Figure 4 It is a left side view of the auxiliary lead terminal, the coil lead terminal, the insulating member and the PCB board in the relay of the present invention;

[0034] Figure 5 It is a three-dimensional diagram of the auxiliary lead terminal, the coil lead terminal and the insulating member in the relay of the present invention;

[0035] Figure 6 A three-dimensional diagram of the auxiliary lead terminal, the coil lead terminal and the insulating member in the relay of the present invention from another perspective;

[0036] Figure 7 A three-dimensional diagram of the assembly of the auxiliary lead-out terminal, the coil lead-out terminal, the insulating member and the magnetic pole piece in the relay of the present invention;

[0037] Figure 8 It is a three-dimensional diagram of the auxiliary lead-out terminal and the coil lead-out terminal in the relay of the present invention;

[0038] Fig. 9 A three-dimensional diagram of a coil assembly and a yoke in a relay of the present invention;

[0039] Fig.10 It is a cross-sectional view of the relay of the present invention.

[0040] Combined with the attached drawings, the following description is given:

[0041] 1. Ceramic cover; 2. Auxiliary static contact; 3. Coil group; 31. Winding terminal;

[0042] 32. Coil skeleton; 321. Lower plate; 3211. Limiting groove; 3212. First protrusion; 322. Upper plate; 3221. Insulation plate; 33. Coil; 4. PCB board; 41. Protruding plate; 42. First groove; 43. Second groove; 5. Auxiliary lead-out terminal; 50. Second material connection point; 51. Plug-in terminal; 52. First section; 53. Second section; 531. First material connection point; 54. Auxiliary lead-out connection terminal; 6. Coil lead-out terminal; 61. Plug-in terminal; 62. Third section; 63. Fourth section Section; 64, coil lead welding end; 7, insulating part; 71, insulating base; 711, bracket; 712, dovetail platform; 713, limit plate; 7131, second protrusion; 72, insulation reinforcement part; 721, base; 722, branch; 7221, inclined part; 7222, vertical part; 8, pole piece; 81, boss part; 811, dovetail groove; 9, yoke; 91, side wall; 10, auxiliary moving spring; 11, push rod group; 12, core group; 13, connecting ring; 14, main static contact; 15, active spring. DETAILED DESCRIPTION

[0043] The exemplary embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. If there are several embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the drawings, unless otherwise specified, the same numbers in different drawings represent the same or similar elements. The contents described in the following exemplary embodiments do not represent all embodiments consistent with the present invention; on the contrary, they are only examples of devices, products and / or methods consistent with some aspects of the present invention as recorded in the claims of the present invention.

[0044] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the scope of protection of the present invention. The singular forms "a", "said" or "the" used in the specification and claims of the present invention are also intended to include plural forms, unless the context clearly indicates other meanings.

[0045] It should be understood that the words used in the specification and claims of the present invention, such as "first", "second" and similar words, do not indicate any order, quantity or importance, but are only used to distinguish the names of features. Similarly, words such as "one" or "a" and similar words do not indicate a quantitative limitation, but indicate the existence of at least one. Unless otherwise specified, words such as "front", "rear", "upper", "lower" and similar words appearing in the present invention are only for the convenience of explanation and are not limited to a specific position or a spatial orientation. Words such as "include" or "comprise" are an open-ended expression, meaning that the elements appearing before "include" or "comprise" include the elements appearing after "include" or "comprise" and their equivalents, which does not exclude that the elements appearing before "include" or "comprise" may also include other elements. If "multiple" or "several" appears in the present invention, it means two or more than two.

[0046] See also Figures 1 to 10 The present invention provides a relay, comprising: a ceramic cover 1, an auxiliary static contact 2, an auxiliary moving spring 10, a main contact group, a push rod group 11, an electromagnetic drive mechanism and an electrical connection structure. In this embodiment, the ceramic cover 1 is roughly rectangular. Figure 1 For reference, the following definitions are made: the front side surface including the long edge of the ceramic cover 1 when viewed directly upon the ceramic cover 1 is the long side surface, the left and right side surfaces are the wide sides, the length direction of the ceramic cover 1 is the first direction, the width direction is the second direction, and the vertical direction is perpendicular to the length direction and the width direction.

[0047] See also Fig.10 The main contact group includes a main static contact 14 and an active spring 15. The main static contact 14 is fixed on the ceramic cover 1. The active spring 15 is arranged in the ceramic cover 1 and is arranged opposite to the main static contact 14. The electromagnetic drive mechanism includes an iron core group 12, a coil group 3, and a magnetic pole piece 8 and a yoke 9 for forming a closed magnetic circuit. The ceramic cover 1 is sealed and fixed on the top of the magnetic pole piece 8 through a connecting ring 13. The yoke 9 is U-shaped and has two opposite side walls 91. The two side walls 91 are fixedly riveted to the magnetic pole piece 8. The coil group 3 is installed in the yoke 9 and is located below the magnetic pole piece 8. The iron core group 12 is arranged in the coil group 3. The push rod group 11 vertically penetrates the magnetic pole piece 8 and is connected between the active spring 15 and the iron core group 12. The coil group 3 is used to magnetize the iron core group 12 after power is turned on, so that the iron core group 12 moves, and drives the active spring 15 to bridge with the main static contact 14 through the push rod group 11.

[0048] In this embodiment, a relay is provided with two auxiliary static contacts 2 and two main static contacts 14 as an example for explanation. The two main static contacts 14 are fixed side by side on the top of the ceramic cover 1 along the first direction, and the two side walls 91 of the yoke 9 are parallel to the wide side of the ceramic cover 1. The two auxiliary static contacts 2 are welded and fixed on the top of the ceramic cover 1 side by side along the length direction, and the two auxiliary static contacts 2 are also on the front side of the line between the two main static contacts 14. One end of each of the two auxiliary static contacts 2 extends downward into the interior of the ceramic cover 1, and the other end of each of them protrudes upward from the top of the ceramic cover 1. The auxiliary moving spring 10 is installed on the push rod group 11, and is arranged opposite to the two auxiliary static contacts 2, and can follow the push rod group 11 upward to bridge with the two auxiliary static contacts 2.

[0049] The electrical connection structure of the present invention includes a PCB board 4 for controlling the operation of the coil group 3, two auxiliary lead terminals 5, two coil lead terminals 6, and an insulating member 7 for holding the auxiliary lead terminals 5 and the coil lead terminals 6. The insulating member 7 is integrally injection molded. The coil group 3 is provided with at least two winding terminals 31, and the two coil lead terminals 6 are electrically connected to the winding terminals 31 through the PCB board 4; the two auxiliary lead terminals 5 are electrically connected to the two auxiliary static contacts 2 in a one-to-one correspondence. The two auxiliary lead terminals 5 are both provided with a plug-in end 51 protruding from the insulating member 7, and the two coil lead terminals 6 are both provided with a plug-in end 61 protruding from the insulating member 7. The plug-in ends 51 of the two auxiliary lead terminals 5 and the plug-in ends 61 of the two coil lead terminals 6 are arranged side by side for docking with an external connector. The PCB board 4, two auxiliary lead terminals 5, two coil lead terminals 6 and the insulating member 7 are located on the same side of the relay, specifically: the two auxiliary lead terminals 5, two coil lead terminals 6 and the insulating member 7 are arranged on the front side of the long side of the ceramic cover 1; the PCB board 4 is arranged between the two side walls 91 in the vertical direction and is located on the front side of the coil group 3, and is also below the insulating member 7; at the same time, the PCB board 4 and the two side walls 91 of the yoke 9 are vertically distributed. The plane where the plug-in terminals 51 and 61 are located is defined as the first plane, and the PCB board 4 is arranged parallel to the first plane. It can be seen that the present invention arranges the plug-in terminals 51 and 61 on the same side and parallel to the PCB board 4, thereby simplifying the structure of the two auxiliary lead terminals 5 and the two coil lead terminals 6, and connecting them as a whole through the insulating member 7, making the internal structure of the relay compact, realizing the miniaturized design of the relay volume, and easy to assemble.

[0050] The insulating member 7 is integrally injection-molded on the two auxiliary lead-out terminals 5 and the two coil lead-out terminals 6 by plastic.

[0051] See also Figure 5The insulating member 7 is provided with a horizontal insulating base 71, which is rectangular in shape. The plug-in ends 51 of the two auxiliary lead-out terminals 5 and the plug-in ends 61 of the two coil lead-out terminals 6 are both led out vertically upward from the top of the insulating base 71 close to the front side.

[0052] The specific structure of the two auxiliary lead terminals 5 is described below.

[0053] See also Figure 5 and Figure 8 , the two auxiliary lead terminals 5 are also provided with a horizontal first section 52 and a vertical second section 53. The first section 52 is arranged along the second direction, and its two ends are respectively connected between the plug-in end 51 of the auxiliary lead terminal 5 and the second section 53 and are completely wrapped by the insulating base 71. The second section 53 extends vertically from one end of the first section 52 and is located between the long side of the ceramic cover 1 and the plug-in end 51 of the auxiliary lead terminal 5. The insulating member 7 is also provided with a vertical insulating reinforcement portion 72 integrally formed with the insulating base 71. The insulating reinforcement portion 72 is Y-shaped and wraps the lower half of the two second sections 53 to strengthen the structural strength and insulation of the two auxiliary lead terminals 5. The upper part of the two second sections 53 is provided with a tooth-shaped first material connection point 531, which is arranged opposite to each other. The first material connection point 531 is formed when the material strip is disconnected, and the material strip is more convenient for fixing and molding the auxiliary lead terminal 5.

[0054] The insulating reinforcement portion 72 includes a base portion 721 connected to the insulating base 71 and two branches 722 extending upward from the base portion 721, and the two branches 722 are symmetrically arranged along the center line. The two branches include an inclined portion 7221 extending obliquely from the base portion in a direction away from each other and a vertical portion 7222 extending vertically upward from the inclined portion 7221.

[0055] In addition, the two auxiliary lead-out terminals 5 are also provided with an auxiliary lead-out connection end 54 with a hole, and the auxiliary lead-out connection end 54 is integrally connected to the top of the second section 53, and the auxiliary lead-out connection end 54 is vertically bent and extended from the second section 53 toward the top of the ceramic cover 1 and is welded and fixed to the top of the auxiliary static contact 2 protruding out of the ceramic cover 1, and the vertical portion 7222 does not cover the auxiliary lead-out connection end 54.

[0056] The auxiliary lead-out terminal 5 of the present invention adopts this structural design, which simplifies the structure, makes the wiring neat, is easy to process, and is convenient to be injection molded into an integrated structure.

[0057] The specific structure of the two coil lead terminals 6 is described below.

[0058] Continue reading Figure 5 and Figure 8 The two coil lead terminals 6 are symmetrically arranged on both sides of the two auxiliary lead terminals 5 along the first direction.

[0059] The coil lead terminal 6 is further provided with a horizontal third section 62 and a horizontal fourth section 63, one end of the third section 62 is integrally connected to the bottom of the plug end 61 of the coil lead terminal 6, the other end of the third section 62 extends backward along the second direction and is integrally connected to the fourth section 63, and the third section 62 is completely wrapped by the insulating base 71. The fourth sections 63 of the two coil lead terminals 6 are respectively led outward along the first direction from both ends of the insulating base 71, and the fourth sections are partially covered in the insulating base 71.

[0060] Furthermore, one end of the fourth section 63 protruding from the insulating base 71 is bent forward horizontally to form a coil lead-out welding end 64, which is parallel to the third section 62 and perpendicular to the fourth section 63. The coil lead-out welding end 64, the third section 62, and the fourth section 63 are in the same plane and perpendicular to the plug-in end 61.

[0061] See also Figure 2 and Figure 3 The PCB board 4 is vertically arranged on one side of the coil group 3 and is located below the insulating base 71. The top of the PCB board 4 is provided with two convex plate portions 41 protruding upward from the insulating base 71 and located on the outer sides of the two ends of the insulating base 71. The coil lead-out welding end 64 is vertically inserted into the convex plate portion 41 and electrically connected thereto.

[0062] The present invention arranges two coil lead terminals 6 symmetrically on both sides of two auxiliary lead terminals 5, and the fourth section 63 of the coil lead terminal 6 is led outward from both ends of the insulating base 71, and is bent to form a coil lead welding end 64, and the coil lead welding end 64 is directly welded to the PCB board 4 to achieve electrical connection. The use of this technical solution can simplify the structure of the coil lead terminal 6, and there is no need to make multiple turning designs on the coil lead terminal 6, saving materials, reducing costs, and it is easy to achieve integration with the two auxiliary lead terminals 5 by injection molding, and further makes the structure of the relay more compact. The present invention can achieve fixing by integral injection molding of the insulating member 7 through the special arrangement and setting mode of the auxiliary lead terminal 5 and the coil lead terminal 6, without the need for multiple injection molding, which can reduce the preparation process, improve the product preparation efficiency, and reduce the cost; and at the same time, the PCB board and the insulating member 7 can also be arranged on the same side, making the product more miniaturized.

[0063] The plug-in ends 61 of the coil lead-out terminal 6 are symmetrically arranged on both sides of the plug-in ends 51 of the auxiliary lead-out terminal 5, and the opposite sides of the two adjacent plug-in ends 51 and 61 are correspondingly provided with tooth-shaped second material connection points 50. The second material connection points 50 are formed when the material strip is disconnected. The material strip is more convenient for fixing and forming the coil lead-out terminal 6 and the auxiliary lead-out terminal 5.

[0064] See also Figure 6 and Figure 7 , the insulating base 71 is installed on the magnetic pole piece 8.

[0065] Specifically, the pole piece 8 is provided with a boss portion 81 in the middle of the front side facing the PCB board 4, and the boss portion 81 is provided with not limited to two dovetail grooves 811. The bottom of the insulating base 71 is provided with a bracket 711, and the bottom of the bracket 711 is provided with not limited to two dovetail platforms 712.

[0066] During assembly, the insulating part 7 is installed from top to bottom so that the two dovetail platforms 712 are inserted into the two dovetail grooves 811 one by one until the bracket 711 abuts against the top of the boss portion 81. At this time, the hole on the auxiliary lead-out connection terminal 54 is just fitted on the auxiliary static contact 2. After that, it is welded and fixed to complete the assembly. It is very convenient and the installation is secure. Accurate positioning can also be achieved through the plug-in cooperation between the dovetail platform 712 and the dovetail groove 811.

[0067] See also Figure 1 , Figure 2 and Fig. 9 The coil assembly 3 is arranged below the magnetic pole piece 8, and includes a coil frame 32 and at least one coil 33 wound around the coil frame 32. The coil 33 is wound with coil wire and has coil pins at both ends. The winding terminal 31 is arranged on the coil frame 32 and is electrically connected to the coil pin of the coil 33.

[0068] It is understandable that when the coil group 3 is a single coil, there are two winding terminals 31; when the coil group 3 has multiple coils, there are multiple winding terminals 31. In this embodiment, the coil group 3 adopts a double coil and has three winding terminals 31, one of which is used as a common terminal.

[0069] See also Figure 2 The coil frame 32 is provided with a lower plate portion 321 at the bottom of the coil 33 and an upper plate portion 322 at the top of the coil 33, and the winding terminal 31 is horizontally led outward from the front side of the upper plate portion 322 toward the PCB board 4. The bottom end of the PCB board 4 is supported on the lower plate portion 321 and positioned by a first limiting structure arranged between the two. The top end of the PCB board 4 abuts against the insulating base 71 and is positioned by a second limiting structure arranged between the two.

[0070] Specifically, a limiting groove 3211 is recessed on the front edge of the lower plate portion 321, and two first protrusions 3212 are provided in the limiting groove 3211. The bottom end of the PCB board 4 is inserted into the limiting groove 3211, and the first protrusion 3212 is plugged into and matched with the first groove 42 provided at the bottom end of the PCB board 4.

[0071] See also Figure 3 , Figure 4 and Figure 6 The bottom of the insulating base 71 is provided with a limit plate 713, which is arranged at intervals on the front side of the bracket 711 and parallel to the PCB board 4. The limit plate 713 is provided with a second protrusion 7131 facing the front side of the PCB board 4.

[0072] During assembly, the PCB board 4 is installed from front to back, so that the bottom end of the PCB board 4 is pushed into the limiting groove 3211, the top end of the PCB board 4 is abutted against the front side of the limiting plate 713, and the second protrusion 7131 is plugged into the second groove 43 provided at the top end of the PCB board 4; at the same time, the three winding terminals 31 and the two coil lead-out welding ends 64 are also just inserted into the corresponding welding holes on the PCB board 4, and then welded and fixed to achieve electrical connection, and the assembly is completed. The assembly is very convenient and the installation is reliable, and the PCB board 4 can be accurately positioned.

[0073] See also Figure 1 and Fig. 9 An insulating plate 3221 extends upward from the front edge of the upper disk portion 322. The insulating plate 3221 is located between the magnetic pole piece 8 and the PCB board 4 to increase the creepage distance between the magnetic pole piece 8 and the PCB board 4 and improve safety.

[0074] The present invention provides a relay, which is used to fix the auxiliary lead-out terminal 5 and the coil lead-out terminal 6 by integral injection molding of an insulating member 7. Compared with the auxiliary lead-out terminal and the coil lead-out terminal in the prior art, which cannot be fixed by an integral injection molding process due to their complex structures and can only be injection molded independently of each other, occupying more space, resulting in the internal structure of the relay being very non-compact, large in size, and complicated in assembly process. The relay applied for by the present invention is improved to facilitate molding and assembly, reduce preparation processes, improve preparation efficiency, reduce preparation costs, enhance structural strength, and make the relay structure more compact and smaller in size.

[0075] The relay of the present invention arranges the PCB board 4, the auxiliary lead terminal 5, the coil lead terminal 6 and the insulating member 7 on the same side, and makes the first plane where the plug-in terminals 51 and 61 of the auxiliary lead terminal 5 and the coil lead terminal 6 are located parallel to the PCB board 4, so that the auxiliary lead terminal 5 and the coil lead terminal 6 are simplified in structure, and can be connected as a whole through the insulating member 7, so that the internal structure of the relay is compactly distributed, and the miniaturized design of the relay volume is realized. At the same time, the present invention arranges the coil lead terminal 6 symmetrically on both sides of the auxiliary lead terminal 5, and the fourth section of the coil lead terminal 6 is led outward from both ends of the insulating base, and is bent to form a coil lead welding terminal 64, and the coil lead welding terminal 64 is directly welded to the PCB board 4 to realize electrical connection. The use of this technical solution can simplify the structure of the coil lead terminal 6, and there is no need to make multiple turning designs on the coil lead terminal 6, so that the wiring is neat, easy to process, save materials, reduce costs, and it is easy to realize injection molding with the auxiliary lead terminal 5 into an integrated form, and further makes the structure of the relay more compact. In addition, the present invention provides a limiting structure between the insulating member 7 and the pole piece 8, and between the PCB board 4, the coil frame 32 and the insulating member 7, so that the assembly is very convenient, the installation is reliable, and accurate positioning can be achieved.

[0076] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A relay, comprising a ceramic cover (1), an auxiliary static contact (2) fixed to the ceramic cover (1), a coil group (3) arranged below the ceramic cover (1), and a PCB board (4) for controlling the operation of the coil group (3), wherein the coil group (3) is provided with a winding terminal (31), characterized in that: It also comprises an auxiliary lead-out terminal (5) correspondingly connected to the auxiliary static contact (2), a coil lead-out terminal (6) electrically connected to the winding terminal (31) via the PCB board (4), and an insulating member (7) for fixing the auxiliary lead-out terminal (5) and the coil lead-out terminal (6), wherein the insulating member (7) is integrally injection-molded.

2. The relay according to claim 1, characterized in that: The auxiliary lead-out terminal (5) is provided with a plug-in end (51) protruding out of the insulating member (7), and the coil lead-out terminal (6) is provided with a plug-in end (61) protruding out of the insulating member (7). The plug-in end (51) of the auxiliary lead-out terminal (5) and the plug-in end (61) of the coil lead-out terminal (6) are arranged side by side and the plane where the plug-in ends (51, 61) are located is defined as a first plane. The PCB board (4) is arranged parallel to the first plane and the PCB board (4) and the insulating member (7) are located on the same side of the relay.

3. The relay according to claim 1, characterized in that: The insulating member (7) is provided with a horizontal insulating base (71), and the plug-in end (51) of the auxiliary lead-out terminal (5) and the plug-in end (61) of the coil lead-out terminal (6) are both led vertically upward from the top of the insulating base (71).

4. The relay according to claim 3, characterized in that: The auxiliary lead terminal (5) is further provided with a horizontal first section (52) and a vertical second section (53), wherein the first section (52) is connected between the plug-in end (51) of the auxiliary lead terminal (5) and the second section (53) and is completely wrapped by the insulating base (71); The second section (53) extends vertically from one end of the first section (52), and the insulating member (7) is further provided with a vertical insulating reinforcement portion (72) integrally formed with the insulating base (71), wherein the insulating reinforcement portion (72) is Y-shaped and wraps at least part of the second section (53).

5. The relay according to claim 4, characterized in that: The insulating reinforcement portion (72) comprises a base portion (721) connected to the insulating base (71) and two branches (722) extending upwardly from the base portion (721), wherein the two branches (722) are symmetrically arranged along a center line.

6. The relay according to claim 5, characterized in that: The two branches (722) include an inclined portion (7221) extending obliquely from the base portion (721) in a direction away from each other and a vertical portion (7222) extending vertically upward from the inclined portion (7221); The auxiliary lead-out terminal (5) is also provided with an auxiliary lead-out connection end (54) integrally connected to the second section (53); the auxiliary lead-out connection end (54) is vertically bent and extended from the second section (53) toward the top of the ceramic cover (1) and is fixedly connected to the auxiliary static contact (2); the vertical portion (7222) does not cover the auxiliary lead-out connection end (54).

7. The relay according to claim 4, characterized in that: The relay is provided with two auxiliary static contacts (2), two auxiliary lead-out terminals (5) corresponding to the two auxiliary static contacts (2), and two coil lead-out terminals (6) fixed to the insulating member (7); the insulating reinforcement portion (72) is arranged corresponding to the second section (53); and the two coil lead-out terminals (6) are symmetrically arranged on both sides of the two auxiliary lead-out terminals (5).

8. The relay according to claim 3, characterized in that: The coil lead terminal (6) is further provided with a horizontal third section (62) and a horizontal fourth section (63); the third section (62) is connected between the plug-in end (61) of the coil lead terminal (6) and the fourth section (63) and is completely wrapped by the insulating base (71); the fourth section (63) of the coil lead terminal (6) extends out of the insulating base (71).

9. The relay according to claim 8, characterized in that: One end of the fourth section (63) protruding from the insulating base (71) is horizontally bent to form a coil lead-out welding end (64); the PCB board (4) is vertically arranged on one side of the coil group (3); the top of the PCB board (4) is provided with two convex plate portions (41) protruding upward from the insulating base (71) and located outside the two ends of the insulating base (71); the coil lead-out welding end (64) is plugged into the convex plate portion (41) and electrically connected thereto.

10. The relay according to claim 3, characterized in that: The relay further comprises a magnetic pole piece (8), the magnetic pole piece (8) being fixed to the bottom of the ceramic cover (1), and the insulating base (71) being mounted on the magnetic pole piece (8); A boss portion (81) is provided in the middle of the magnetic pole piece (8) on the side facing the PCB board (4), and a dovetail groove (811) is provided on the boss portion (81); a bracket (711) is provided at the bottom of the insulating base (71), and a dovetail platform (712) is provided at the bottom of the bracket (711), the bracket (711) abuts against the boss portion (81), and the dovetail platform (712) is plugged into and matched with the dovetail groove (811).

11. The relay according to claim 10, characterized in that: The coil group (3) is arranged below the magnetic pole piece (8), and comprises a coil frame (32) and at least one coil (33) wound around the coil frame (32); the winding terminal (31) is arranged on the coil frame (32) and is electrically connected to a coil pin of the coil (33); The coil frame (32) is provided with a lower plate portion (321) located at the bottom of the coil (33), and the bottom end of the PCB board (4) is supported and fixed on the lower plate portion (321); The top end of the PCB board (4) abuts against the insulating base (71).

12. The relay according to claim 11, characterized in that: A limiting groove (3211) is provided on one side of the lower plate portion (321), a first protrusion (3212) is provided in the limiting groove (3211), the bottom end of the PCB board (4) is inserted into the limiting groove (3211), and the first protrusion (3212) is plugged and matched with a first groove (42) provided at the bottom end of the PCB board (4); A limiting plate (713) parallel to the PCB board (4) is provided at the bottom of the insulating base (71), and a second protrusion (7131) is provided on the side of the limiting plate (713) facing the PCB board (4); the PCB board (4) is abutted against the side of the limiting plate (713) provided with the second protrusion (7131), and the second protrusion (7131) is plugged into and matched with a second groove (43) provided at the top end of the PCB board (4).

13. The relay according to claim 11, characterized in that: The coil frame (32) is provided with an upper disk portion (322) located at the top of the coil (33); the winding terminal (31) is horizontally led outward from one side of the upper disk portion (322) toward the PCB board (4) and is electrically connected to the PCB board (4); an insulating plate (3221) is extended upward from the edge of the one side of the upper disk portion (322), and the insulating plate (3221) is located between the magnetic pole piece (8) and the PCB board (4).

14. The relay according to claim 10, characterized in that: The relay further comprises a yoke (9), the yoke (9) being U-shaped and provided with two opposite side walls (91), the two side walls (91) being fixedly connected to the magnetic pole piece (8); the PCB board (4) is arranged between the two side walls (91) and is distributed vertically with respect to the two side walls (91).

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