Relay

Abstract

The utility model discloses a relay. A magnetic circuit part of the relay comprises a coil assembly and an iron core. The coil assembly comprises a coil, a coil rack and a circuit board, two vertical coil terminals in the same row are arranged on a flange on one side of the coil rack, and through holes matched with the coil terminals are formed in the circuit board; the circuit board is erected on the coil rack, and the coil terminal penetrates out of the through hole; an enameled wire is wound on the winding shaft of the coil rack to form the coil, and two ends of the enameled wire are respectively wound on the two coil terminals and are led out to be connected with a component arranged on the circuit board; and the iron core passes through the coil. According to the utility model, the winding of the enameled wire is facilitated, the situation of turn-to-turn short circuit caused by crossing formed by pulling the enameled wire from one end to the other end is avoided, and a series of operations of tinning the enameled wire and the like can be avoided by threading the wire from the lower part of the circuit board and leading out the wire from the coil terminal; the relay structure provided by the utility model is beneficial to automatic assembly of the relay.

Description

Technical Field

[0001] The utility model belongs to the technical field of relays and relates to a relay. Background Art

[0002] A relay is an electrical control device that is widely used in control circuits of household appliances, remote controls, communications, and automation. Its actual function is to control the large current in the output circuit through the small current in the control circuit. It is an automatic switch.

[0003] The existing AC electromagnetic relay magnetic circuit system adopts a combined structural design of a coil frame plus a support block bridge stack. The assembly method is that the enameled wire is first manually wound around one end of the coil frame and then enters through the wire entry slot. After the enameled wire is wound, the other end is manually wound around the coil frame. The rectifier bridge stack is installed on the support block and then the rectifier bridge is glued, dried and fixed. Then the varistor is bent, and solder is installed on the support block to form the support block part. The support block part is installed on the coil part, and then the enameled wire originally wound around the two ends of the coil frame is wound around the rectifier bridge of the support block part, and then tinned to complete the assembly of the coil part of the relay magnetic circuit system. After that, the coil part is assembled with the iron core and the yoke iron by riveting to form the magnetic circuit system of the relay.

[0004] When assembling the existing relay, the coil frame is first placed on the winding machine, and then the second end of the enameled wire is manually wound on the right coil frame terminal, and then the winding is performed to form a coil. After the winding is completed, the first end of the enameled wire is wound on the left coil frame terminal, and then pulled over the enameled wire, and then the first end of the enameled wire and the second end of the enameled wire are manually tinned and trimmed to a suitable length. Prepare the support block assembly, manually shape the rectifier bridge stack and the varistor, install them on the support block after the wire cutting process, and then connect the varistor terminal and the rectifier bridge stack terminal together by soldering to form a support block part, and then install the support block part on the coil frame, and wind the first end enameled wire and the second end enameled wire on the upper rectifier bridge terminal and the rectifier bridge terminal, and connect them together by soldering to form a coil part, and the coil part is riveted together with the iron core and the yoke iron to form an electromagnetic relay magnetic circuit system.

[0005] The above assembly process is too complicated and prone to errors, and automated equipment cannot achieve automatic assembly; the manual winding of the enameled wire on both ends of the coil frame is likely to cause damage to the paint film, and the method of fixing the enameled wires on both sides of the same-direction terminal is likely to cause a short circuit between turns when the enameled wires are pulled from one end to the other to form a cross. When the enameled wire is manually wound on the rectifier bridge, the rectifier bridge terminals are too sharp and easy to scratch, cutting the enameled wire, causing the basic functions of the relay to fail and unable to be used normally. Utility Model Content

[0006] The problem solved by the utility model is to provide a relay, which can improve the assembly efficiency and product quality by changing the lead-out mode of the enameled wire through improving the coil terminal and avoiding the operation of tinning the enameled wire.

[0007] The utility model is realized by the following technical solutions:

[0008] A relay comprises a relay magnetic circuit part, wherein the relay magnetic circuit part comprises a coil assembly and an iron core; the coil assembly comprises a coil, a coil frame and a circuit board, a flange on one side of the coil frame is provided with at least two coil terminals in the same row and in a vertical direction, the coil terminals are spaced a certain distance apart, and a through hole matching the coil terminals is provided on the circuit board;

[0009] The circuit board is mounted on the coil frame, and the coil terminal passes through the through hole; the enameled wire is wound on the winding shaft of the coil frame to form the coil, and the two ends of the enameled wire are respectively wound on two coil terminals and led out to be connected with the components arranged on the circuit board; the iron core passes through the coil.

[0010] A limiting structure or an auxiliary fixing structure is also provided between the coil frame and the circuit board;

[0011] The coil terminal is electrically connected to the circuit board, and a certain distance is left between the bottom end of the coil terminal extending out of the coil frame and the circuit board.

[0012] The flange where the coil terminal is located is also provided with two wire grooves that lead from the coil terminal to the coil frame winding shaft; one end of the enameled wire is wound on the coil frame winding shaft from the right coil terminal through the wire groove, and the other end is wound on the left coil terminal from the coil frame winding shaft through another wire groove.

[0013] The wire trough comprises an inlet trough and an outlet trough which are arranged on the same flange and have openings facing the same direction. The inlet trough and the outlet trough are located on both sides of the winding shaft of the coil frame and are respectively arranged corresponding to the coil terminals.

[0014] The limiting structure or the auxiliary fixing structure comprises:

[0015] The coil frame is provided with a supporting boss beside the coil terminal, a certain distance is provided between the supporting boss and the coil terminal, and matching grooves are provided beside the circuit board and the through hole; and / or,

[0016] The coil frame is provided with a positioning boss on the flange on the opposite side of the coil terminal, and a matching limiting platform is provided on the circuit board.

[0017] The coil terminals are symmetrically arranged on the flange of the coil frame, a left supporting boss is arranged beside the left coil terminal, and a right supporting boss is arranged beside the right coil terminal; a matching left groove and right groove are arranged on the circuit board;

[0018] The coil frame is symmetrically provided with a left positioning boss and a right positioning boss on the flanges on the opposite sides of the coil terminal; and the circuit board is provided with a matching left limit platform and a right limit platform.

[0019] The components on the circuit board are arranged on a surface of the circuit board facing the coil.

[0020] The coil terminal is welded to the circuit board after the enameled wire is led out;

[0021] The components include a rectifier bridge and a varistor, and the two ends of the coil are respectively connected to the terminals on the rectifier bridge.

[0022] Furthermore, the relay further comprises a housing and a base; the relay magnetic circuit portion is arranged between the housing and the base, the corners of the coil frame support the circuit board, and the coil frame and the base cooperate to clamp the circuit board;

[0023] The base is also provided with a supporting boss for supporting the circuit board.

[0024] The magnetic circuit part also includes a yoke, which is fixed to the coil frame through the iron core, and the yoke is also inserted into the base and fixed through a cut mark;

[0025] The shell and the base are connected by means of buckles arranged on both sides.

[0026] Compared with the prior art, the utility model has the following beneficial technical effects:

[0027] 1. The relay provided by the utility model improves the connection relationship between the coil frame and the circuit board by changing the position of the coil terminal. The coil terminal is vertically arranged on the coil frame and passed through the circuit board. The coil terminal is used as the terminal for winding and leading out the enameled coil. The led-out wire end can be directly connected to the component arranged on the circuit board. This not only facilitates the winding of the enameled wire and avoids the situation where the enameled wire is pulled from one end to the other end to form a cross and cause a short circuit between turns; it can also be led out from the coil terminal by passing the wire under the circuit board, avoiding a series of operations such as tinning the enameled wire.

[0028] 2. The relay structure of the utility model is conducive to automatic assembly by machines; the structure of a coil frame and a circuit board is adopted, and the winding terminals of the relay adopt the same direction coil terminals. During the winding process, the coil terminals do not need to be bent and can be directly wound; a through hole is opened on the circuit board, and after the winding is completed, the circuit board is set on the coil frame by positioning the coil terminals and the through holes, and electronic components are installed on the circuit board. The components are arranged on the side of the circuit board facing the coil, which makes the relay structure more compact and facilitates spot welding of the coil terminals and the enameled wire lead-out ends; completing the welding assembly can simplify the process, reduce manpower requirements, realize automatic winding, and greatly improve production efficiency and product quality.

[0029] 3. The assembly of the relay provided by the utility model is an environmentally friendly assembly process; the enameled wire does not need to be manually wound, and the coil terminal is welded and fixed to the circuit board after the enameled wire is led out, and there is no need to tin the enameled wire, and there is no need to wind the tinned enameled wire around the rectifier bridge terminal, and then cut the wire and other processes; compared with before, electronic components such as varistors no longer require manual bending, shaping, soldering, gluing, baking and other processes, which reduces the generation of waste gas and waste, and possible harm to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic cross-sectional view of the structure of the relay of the utility model;

[0031] Figure 2 It is an explosion diagram of the relay of the utility model;

[0032] Figure 3 This is a schematic diagram of the coil frame and circuit board structure of the utility model relay;

[0033] Figure 4 A schematic diagram of a coil frame of a relay of the utility model;

[0034] Figure 5 It is a schematic diagram of a circuit board in the relay of the utility model;

[0035] Figure 6 It is a schematic diagram of the wire duct in the relay of the utility model.

[0036] Among them: 1. Shell; 2. Base; 3. Rectifier bridge stack; 4. Circuit board; 5. Coil frame; 6. Armature; 9 is support block; 15. Yoke; 16. Iron core; 18. Rear end enameled wire; 19. Left coil terminal; 20. Left positioning boss; 23. Coil; 24. Right coil terminal; 25. Front end enameled wire; 26. Left supporting boss; 27. Right positioning boss; 28. Right supporting boss; 30. Varistor; 31. Outlet slot; 32. Inlet slot; 33. Left limit platform; 34. Right limit platform. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings, which are intended to explain the present invention rather than to limit it.

[0038] See also Figure 1-Figure 3 A relay comprises a relay magnetic circuit part, the relay magnetic circuit part comprises a coil assembly and an iron core; the coil assembly comprises a coil 23, a coil frame 5 and a circuit board 4, a flange on one side of the coil frame 5 is provided with at least two coil terminals in the same row and in a vertical direction, the coil terminals are spaced a certain distance apart, and a through hole matching the coil terminals is provided on the circuit board 4;

[0039] The circuit board 4 is mounted on the coil frame 5, and the coil terminal passes through the through hole; the enameled wire is wound on the winding shaft of the coil frame to form the coil 23, and the two ends of the enameled wire are respectively wound on two coil terminals and led out to be connected to the components arranged on the circuit board 4; the iron core 16 passes through the coil.

[0040] Specifically, the relay provided in this embodiment has two coil terminals (right coil terminal 24 and left coil terminal 19) arranged in the same row and vertically on a flange on the coil frame 22; wherein the coil terminals are square terminals or circular terminals, as long as they are terminals in the same direction fixed on the coil frame; the coil terminals play the role of leading out the enameled wire and conveniently connecting the coil to the circuit board electrically, so the coil terminals are made of conductive materials. Moreover, the two coil terminals are passed through the circuit board 21 and electrically connected by welding. The coil terminals are spaced a certain distance apart so that the two ends of the coil maintain the necessary distance.

[0041] In this embodiment, two coil terminals are provided. In other embodiments, three or four coil terminals may be provided. The number of coil terminals is selected according to actual needs.

[0042] In the conventional relay, the support block 3 is directly pressed into the coil frame, and the support block 3 is easily damaged and shattered, thereby contaminating the inside of the coil frame. Compared with the conventional relay, the connection between the coil frame and the circuit board of the utility model is more reliable, and the structure is more concise.

[0043] For further information, see Figure 2-Figure 5 A limiting structure or an auxiliary fixing structure is also provided between the coil frame 5 and the circuit board 4;

[0044] The coil terminal is electrically connected to the circuit board, and a certain distance is left between the bottom end of the coil terminal extending out of the coil frame and the circuit board.

[0045] Specifically, the limiting structure or the auxiliary fixing structure includes:

[0046] The coil frame is provided with a supporting boss beside the coil terminal, and there is a certain distance between the supporting boss and the coil terminal (to facilitate winding), and the circuit board and the through hole are provided with matching grooves; and / or,

[0047] The coil frame is provided with a positioning boss on the flange on the opposite side of the coil terminal, and a matching limiting platform is provided on the circuit board.

[0048] A limiting structure or an auxiliary fixing structure is also provided between the coil frame and the circuit board; it can not only realize the alignment and positioning of the coil frame and the circuit board, but also increase the contact area, and auxiliary fixing can be performed by fixing agent or glue when necessary.

[0049] Specific as Figure 4 , Figure 5 As shown, the coil terminals are symmetrically arranged on the flange of the coil frame, a left supporting boss 26 is arranged beside the left coil terminal 19, and a right supporting boss 28 is arranged beside the right coil terminal 24; a matching left groove and right groove are arranged on the circuit board 4;

[0050] The coil frame is symmetrically provided with a left positioning boss 20 and a right positioning boss 27 on the flanges on the opposite sides of the coil terminal; the circuit board is provided with a matching left limit platform 33 and a right limit platform 34. The limit platform is not limited to the form shown in the drawings, and can be C-shaped or L-shaped. When the limit slot is C-shaped, the circuit board is installed first, and then the coil terminal is installed; when the limit slot is L-shaped, there is no order of installation.

[0051] See also Figure 3 , Figure 6 On the flange where the coil terminal is located, two wire grooves are respectively provided, which lead from the coil terminal to the coil frame winding shaft; one end of the enameled wire is wound on the coil frame winding shaft from the right coil terminal through the wire groove, and the other end is wound on the left coil terminal from the coil frame winding shaft through another wire groove.

[0052] Specifically, the wire duct includes an inlet duct 32 and an outlet duct 31 which are arranged on the same flange and have openings facing the same direction. The inlet duct 32 and the outlet duct 31 are located on both sides of the winding shaft of the coil frame and are respectively arranged corresponding to the coil terminals.

[0053] The utility model coil frame is provided with wire grooves in the same direction in both the inlet and outlet directions of the enameled wires to avoid contact between the ends of the enameled wires to cause short circuit between turns; and the enameled wires are placed in the wire grooves to protect the enameled wires to avoid scratches and damage.

[0054] Furthermore, the components on the circuit board are arranged on a side of the circuit board facing the coil; thus, the relay structure is more compact.

[0055] Specifically, the coil terminal is welded to the circuit board after the enameled wire is led out; the coil terminal is welded to the circuit board after being tinned to ensure a reliable connection between the two.

[0056] The components include a rectifier bridge 3 and a varistor 30 , and both ends of the coil are connected to the terminals on the rectifier bridge respectively.

[0057] The utility model arranges the side of the circuit board 4 provided with the rectifier bridge close to the coil frame 5, so as to avoid the problem that the enameled wire is abutted against the support block as in the traditional relay, and in order to avoid scratching the enameled wire and ensure its installation position, it is also necessary to provide a mounting groove on the support block; and this structure of the utility model saves the cost of the enameled wire, and the length of the enameled wire required for connecting with the rectifier bridge after winding is completed is less than the length of the enameled wire in the traditional relay.

[0058] Furthermore, it also includes a shell 1 and a base 2; the relay magnetic circuit part is arranged between the shell 1 and the base 2, the corners of the coil frame 5 support the circuit board, and the coil frame 5 and the base 2 cooperate to clamp the circuit board; the circuit board and the coil frame are fixed between the shell and the base through a yoke and the base, which strengthens the fixation of the circuit board and ensures the welding stability of the circuit board and the coil terminal.

[0059] A support platform for supporting the circuit board is also provided on the base 2 to ensure that the circuit board does not move.

[0060] The magnetic circuit part also includes a yoke 15, which is fixed to the coil frame 5 through the iron core 16, and the yoke 15 is also inserted into the base 2 and fixed through a cut;

[0061] The housing 1 and the base 2 are connected by buckles arranged on both sides.

[0062] A specific embodiment and its assembly process are given below.

[0063] When assembling the relay, the coil frame 5 is first fixed by the automatic machine, the enameled wire is wound on the right coil terminal 24, and then enters the wire frame along the wire inlet groove 32 for winding; after the coil is wound, the rear end enameled wire 18 is led out along the wire outlet groove 31 and wound on the left coil terminal 19; the right coil terminal 24 and the left coil terminal 19 are tinned by the automatic machine;

[0064] The varistor 30 and the rectifier bridge stack 3 are automatically assembled on the circuit board 4 by a chip mounter, and then the circuit board is automatically mounted on the wound coil frame 5 by a suction cup; in this way, the enameled wire is threaded from the bottom of the circuit board 4 and led out from the coil terminal to the top of the circuit board 4; the right coil terminal 24 and the left coil terminal 19 are electrically connected (welded) to the circuit board 4 using an automatic spot welding machine;

[0065] The coil part is connected with the yoke 15 and the iron core 16 to form the magnetic circuit part of the electromagnetic relay; finally, the magnetic circuit part is installed on the base and fixed to the base through the yoke cut in the magnetic circuit part, so that the coil frame and the base cooperate to clamp the circuit board.

[0066] The relay assembly structure of the utility model adopts the method of adding the same-direction coil terminal and the coil frame 5 to fix and support the circuit board 4, which effectively solves the problems of complicated procedures and inconvenient installation of the original magnetic circuit system, simplifies the production process, and many procedures prone to problems are no longer required, so that it can facilitate automated production and realize unmanned operation. The wire groove is opened on the coil frame 5, which effectively avoids the occurrence of inter-turn short circuit.

[0067] Compared with the prior art, the utility model adopts a method of adding a pair of vertically arranged coil terminals on the coil frame 5, which can effectively solve the connection problem between the rectifier bridge and the enameled wire. The rectifier bridge is installed on the circuit board 4, and the circuit board 4 is connected to the coil terminal; the enameled wire no longer needs to be manually wound, and the wire can be passed from the bottom of the support block, and there is no need to tin the enameled wire, and there is no need to wind the tinned enameled wire around the rectifier bridge stack terminals, and then cut the wire and other processes; the addition of wire grooves on the left and right ends of the coil frame 5 can effectively avoid the problem of inter-turn short circuit at the first and last ends of the relay.

[0068] Compared with before, electronic components such as varistors no longer require manual bending, shaping, soldering, gluing, baking and other processes, reducing the generation of exhaust gas and waste, and possible harm to the human body.

[0069] In short, after using the magnetic circuit part of the utility model, the process can be simplified, the manpower requirements can be reduced, automatic winding can be realized, and the production efficiency and product quality can be greatly improved; at the same time, since the processes of cutting the feet, shaping, dispensing, baking, bending, manual soldering of electronic components are eliminated, workers do not need to manually dispense glue and solder at close range, which reduces contact with harmful chemicals and can also ensure the health of employees.

[0070] The directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0071] The above embodiments are preferred examples for implementing the present invention, and the present invention is not limited to the above embodiments. Any non-essential additions and substitutions made by those skilled in the art based on the technical features of the present invention are within the protection scope of the present invention.

Claims

1. A relay, comprising a relay magnetic circuit portion, characterized in that: The magnetic circuit of the relay includes a coil assembly and an iron core; the coil assembly includes a coil, a coil frame and a circuit board, a flange on one side of the coil frame is provided with at least two coil terminals in the same row and in a vertical direction, the coil terminals are spaced a certain distance apart, and a through hole matching the coil terminals is provided on the circuit board; The circuit board is mounted on the coil frame, and the coil terminal passes through the through hole; the enameled wire is wound on the winding shaft of the coil frame to form the coil, and the two ends of the enameled wire are respectively wound on two coil terminals and led out to be connected with the components arranged on the circuit board; the iron core passes through the coil.

2. The relay according to claim 1, characterized in that A limiting structure or an auxiliary fixing structure is also provided between the coil frame and the circuit board; The coil terminal is electrically connected to the circuit board, and a certain distance is left between the bottom end of the coil terminal extending out of the coil frame and the circuit board.

3. The relay according to claim 1 or 2, characterized in that: The flange where the coil terminal is located is also provided with two wire grooves that lead from the coil terminal to the coil frame winding shaft; one end of the enameled wire is wound on the coil frame winding shaft from the right coil terminal through the wire groove, and the other end is wound on the left coil terminal from the coil frame winding shaft through another wire groove.

4. The relay according to claim 3, characterized in that The wire trough comprises an inlet trough and an outlet trough which are arranged on the same flange and have openings facing the same direction. The inlet trough and the outlet trough are located on both sides of the winding shaft of the coil frame and are respectively arranged corresponding to the coil terminals.

5. The relay according to claim 2, characterized in that The limiting structure or the auxiliary fixing structure comprises: The coil frame is provided with a supporting boss beside the coil terminal, a distance is provided between the supporting boss and the coil terminal, and a matching groove is provided beside the circuit board and the through hole; and / or, The coil frame is provided with a positioning boss on the flange on the opposite side of the coil terminal, and a matching limiting platform is provided on the circuit board.

6. The relay according to claim 5, characterized in that The coil terminals are symmetrically arranged on the flange of the coil frame, a left supporting boss is arranged beside the left coil terminal, and a right supporting boss is arranged beside the right coil terminal; a matching left groove and right groove are arranged on the circuit board; The coil frame is symmetrically provided with a left positioning boss and a right positioning boss on the flanges on the opposite sides of the coil terminal; and the circuit board is provided with a matching left limit platform and a right limit platform.

7. The relay according to claim 1, characterized in that The components on the circuit board are arranged on a surface of the circuit board facing the coil.

8. The relay according to claim 1 or 7, characterized in that: The coil terminal is welded to the circuit board after the enameled wire is led out; The components include a rectifier bridge and a varistor, and the two ends of the coil are respectively connected to the terminals on the rectifier bridge.

9. The relay according to claim 1, characterized in that It also includes a housing and a base; the relay magnetic circuit part is arranged between the housing and the base, the corners of the coil frame support the circuit board, and the coil frame and the base cooperate to clamp the circuit board; A supporting platform for supporting the circuit board is also provided on the base.

10. The relay according to claim 9, characterized in that The magnetic circuit part also includes a yoke, which is fixed to the coil frame through the iron core, and the yoke is also inserted into the base and fixed through a cut mark; The shell and the base are connected by means of buckles arranged on both sides.

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