An electromagnetic coil

Abstract

This utility model belongs to the field of electromagnetic valve technology, specifically relating to an electromagnetic coil, including a frame, a wound coil, a wound terminal, and a wiring terminal. The frame has two first insertion slots. The wound terminal is inserted and fixed in the first insertion slot, including a conductive plate and a wound pin and a first insertion part connected to the conductive plate. The first insertion part is located on one side of the conductive plate along a second direction and extends outward along the second direction, and has a second insertion slot arranged along the second direction. The first direction and the second direction may be the same or different. The wiring terminal includes a conductive pin and a wiring pin. The conductive pin is inserted and mated with the second insertion slot, and the width of the conductive pin along the first direction is adapted to the second insertion slot, so that the conductive pin and the first insertion part are tightly fitted. The purpose of the separate lead conductive pin design of this utility model is to allow the use of traditional winding equipment without interfering with the winding, and the tight fit between the wound terminal and the wiring terminal ensures a stable electrical connection.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve technology, and specifically relates to an electromagnetic coil. Background Technology

[0002] The electromagnetic coil structure used in small solenoid valves mostly includes a coil frame, two conductive leads, enameled wire, and a plastic casing. The two conductive leads are inserted and fixed to one end of the coil frame and each has a winding terminal and a wiring terminal. The enameled wire is wound around the coil frame and the two ends of the enameled wire are respectively connected to the winding terminals of the two conductive leads. The plastic casing is encapsulated outside the coil frame and the enameled wire. The wiring terminals of the two conductive leads pass through the plastic casing for wiring. Currently, there are two main types of conductive lead pins in electromagnetic coils: one is a single-piece structure, where the winding terminal and the wiring terminal are located on a single piece, as disclosed in patent CN 217640948 U. During production, the conductive lead pin is directly inserted into the coil frame, and then the wire is wound and bent. This has a problem: the bending process is difficult to control and requires high automation precision; otherwise, there is a risk of breakage of the lead pin connecting the enameled wire. The other type is a separate insertion structure, where the winding terminal and the wiring terminal are two separate pieces. The winding terminal with a flat insert structure is first wound and resistance soldered, and then the wiring terminal is inserted. However, this design also has some problems. The flat insert design requires high precision in automated soldering, which is not conducive to automated winding. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an electromagnetic coil.

[0004] The technical solution adopted by this utility model is as follows: an electromagnetic coil, comprising:

[0005] The frame has two first insertion slots;

[0006] A wound coil is formed by winding cored wire around the skeleton body and has two wire ends;

[0007] A winding terminal is inserted and fixed in a first insertion slot, including a conductive plate and a winding pin and a first insertion part connected to the conductive plate. The winding pin is located on one side of the conductive plate along a first direction and extends outward along the first direction. The wire end of the winding coil is fixed on the winding pin. The first insertion part is located on one side of the conductive plate along a second direction and extends outward along the second direction and has a second insertion slot arranged along the second direction. The first direction and the second direction may be the same as or different.

[0008] The terminal block includes conductive pins and wiring pins, wherein the conductive pins are inserted into a second insertion slot and the width of the conductive pins is adapted to the second insertion slot so that the conductive pins and the first insertion part are tightly fitted.

[0009] The first insertion part has a U-shaped structure, including a first insertion plate and two mating plates that are spaced apart and extend upward from both sides of the first insertion plate. A second insertion groove is formed between the first insertion plate and the two mating plates along the second direction.

[0010] The inner wall of the mating plate protrudes to form a fastening block, and the width of the conductive pin is less than the distance between the two mating plates but greater than the distance between the two fastening blocks.

[0011] The first direction is perpendicular to the second direction; the first insertion slot includes a first groove adapted to the first insertion part for insertion along the second direction and a second groove located on one side of the first groove for insertion of the winding pin along the second direction, the width of the first groove along the first direction being adapted to the width of the first insertion part along the first direction.

[0012] The mating plate has an inclined guide plate at its far end relative to the conductive plate, and the guide plates of the two mating plates are distributed in a V-shape with concave inwards.

[0013] The winding pin is provided with multiple limiting bumps, which are distributed on both sides of the winding pin to form a grid-shaped winding structure.

[0014] The skeleton includes a cylindrical skeleton body, an annular upper limit wall extending outward from the upper end of the skeleton body, and an annular lower limit wall extending outward from the lower end of the skeleton body. The upper limit wall is provided with two first insertion slots, and the winding coil is located between the upper limit wall and the lower limit wall.

[0015] It also includes a magnetic yoke, which is a C-shaped iron frame with a middle connecting plate and two limiting plates at both ends. The limiting plates are respectively snapped onto the outer side of the upper limiting wall and the lower limiting wall of the frame. The middle connecting plate is provided with through holes for wiring pins to pass through.

[0016] It also includes a plastic encapsulation shell, which is formed by encapsulating the skeleton, winding coil, winding terminal, wiring terminal, and magnetic yoke assembly.

[0017] The beneficial effects of this utility model are as follows: The purpose of the lead conductive pin of this utility model through the split design is that it can use traditional winding equipment without interfering with the winding, and the winding terminal and the wiring terminal are tightly fitted to ensure a stable electrical connection. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0019] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0020] Figure 2 This is an exploded view of one embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the skeleton structure in one embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the winding terminal in one embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the wiring terminal in one embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the lead conductive pin in one embodiment of the present invention;

[0025] Figure 7 This is a partial cross-sectional view of the first insertion slot of the skeleton in one embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the skeleton and the winding terminal being inserted and mated in one embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure after the plastic seal is hidden in one embodiment of the present invention;

[0028] In the diagram, the components are: skeleton-1, skeleton body-11, upper limit wall of skeleton-12, lower limit wall of skeleton-13, first insertion slot-14, first groove-141, second groove-142, winding coil-2, winding terminal-3, conductive plate-31, winding pin-32, limiting protrusion-321, first insertion part-33, first insertion plate-331, mating plate-332, fastening block-3321, guide plate-3322, second insertion slot-333, wiring terminal-4, conductive pin-41, wiring pin-42, magnetic yoke-5, intermediate connecting plate-51, through hole-511, limiting plate-52, and plastic casing-6. Detailed Implementation

[0029] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0030] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0031] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0032] An electromagnetic coil, such as Figure 1 , Figure 2 As shown, it includes a frame 1, a wound coil 2, lead wire conductive pins, a magnetic yoke 5, and a plastic casing 6. The lead wire conductive pins are composed of a winding terminal 3 and a wiring terminal 4 that are separately plugged in and connected.

[0033] like Figure 3 As shown, the skeleton 1 includes a cylindrical skeleton body 11, an annular upper limit wall 12 extending outward from the upper end of the skeleton body 11, and an annular lower limit wall 13 extending outward from the lower end of the skeleton body 11. The upper limit wall 12 is provided with two first insertion slots 14 for inserting and fixing the winding terminal 3.

[0034] The winding coil 2 is formed by a cored wire wound around the outside of the skeleton body 11 and is located between the upper limit wall 12 and the lower limit wall 13 of the skeleton, and has two wire ends.

[0035] The winding terminal 3 is inserted and fixed in the first insertion slot 14, such as Figure 4 As shown, it includes a conductive plate 31, a winding pin 32 connected to the conductive plate 31, and a first insertion portion 33. The winding pin 32 is located on one side of the conductive plate 31 along a first direction A and extends outward along the first direction A. The first insertion portion 33 is located on one side of the conductive plate 31 along a second direction B and extends outward along the second direction B, making the winding terminal 3 generally L-shaped. The first insertion portion 33 has a U-shaped structure, including a first insertion plate 331 and two mating plates 332 formed by extending upward from both sides of the first insertion plate 331 and spaced apart. A second insertion groove 333 is formed between the first insertion plate 331 and the two mating plates 332 along the second direction B. Figure 5As shown, the terminal block 4 includes conductive pins 41 and wiring pins 42, as... Figure 6 As shown, the conductive pin 41 is inserted into the second insertion slot 333, and the width of the conductive pin 41 is adapted to the second insertion slot 333, so that the conductive pin 41 and the two mating plates 332 are tightly fitted. In this embodiment, the first direction A is perpendicular to the second direction B, so that the winding pin 32 and the first insertion plate 331 can be located at the same height. Alternatively, the first direction A and the second direction B can be in the same direction or tilted to form a certain angle. By setting the height direction of the winding pin 32 and the first insertion plate 331 to be staggered, interference is avoided, but it is necessary to bend the conductive plate 31 to form the height direction stagger.

[0036] Among them, such as Figure 4 As shown, the winding pin 32 is provided with multiple limiting protrusions 321, which are distributed on both sides of the winding pin 32 to form a grid-shaped winding structure. The advantage of this design is that it can perform multi-segment winding during winding, preventing the fixed end from coming off due to force during the winding process.

[0037] Among them, such as Figure 4 As shown, the inner wall of the mating plate 332 protrudes to form a fastening block 3321. The width of the conductive pin 41 along the first direction A is less than the distance between the two mating plates 332 but greater than the distance between the two fastening blocks 3321. This arrangement ensures that the terminal 4 is securely fixed during mating, while also preventing assembly difficulties due to an excessively large interference surface. Specifically, the fastening block 3321 is formed by stamping on the mating plate 332.

[0038] Among them, such as Figure 7 As shown, the first insertion slot 14 includes a first groove 141 adapted to the first insertion part 33 for insertion along the second direction B, and a second groove 142 located on one side of the first groove 141 for insertion of the winding pin 32 along the second direction B. The width of the first groove 141 along the first direction A is adapted to the width of the first insertion part 33 along the first direction A, so that when the two are inserted and mated, the two opposite side walls of the first groove 141 along the first direction A limit the two mating plates 332, ensuring a tight fit between the two mating plates 332 and the conductive pin 41.

[0039] Among them, such as Figure 4 As shown, the mating plate 332 has an inclined guide plate 3322 at its far end relative to the conductive plate 31. The guide plates 3322 of the two mating plates 332 are arranged in a V-shape with concave inward distribution, which facilitates the guiding function when inserted into the first groove 141.

[0040] The magnetic yoke 5 is specifically designed as a U-shaped iron frame with a middle connecting plate 51 and two limiting plates 52 at both ends. The limiting plates 52 are respectively snapped onto the outer side of the upper limiting wall 12 and the lower limiting wall 13 of the frame. The middle connecting plate 51 is provided with a through hole 511 for the wiring pin 42 to pass through.

[0041] like Figure 1 As shown, the plastic casing 6 is formed by encapsulating the above structure with insulating material, and the wiring pins 42 are exposed for wiring.

[0042] The assembly process of this embodiment is as follows: Two winding terminals 3 are inserted and fixed in the first insertion slot 14 on the frame 1, and the winding is performed by an automatic winding machine. During winding, the two ends of the core wire are wound and fixed on the winding pins 32 of the two winding terminals 3 respectively to form a winding coil 2. Then, the terminal 4 is inserted and fixed to the winding terminal 3. After that, the magnetic yoke 5 is assembled, and finally the plastic sealing is completed to form the plastic sealing shell 6.

[0043] The purpose of using a split-design lead conductive pin in this embodiment is to allow the use of traditional winding equipment without interfering with the winding process. The entire frame is plastic-coated after fixing, which ensures that the coil structure is formed in one piece, unlike traditional water valve coils, which require separate frame riveting after plastic encapsulation. The advantage of this design is that the electrical performance is more stable and reliable.

[0044] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An electromagnetic coil, characterized in that, include: The frame (1) is provided with two first insertion slots (14). The wound coil (2) is formed by winding cored wire around the skeleton (1) and has two ends; The winding terminal (3) is inserted and fixed in the first insertion slot (14), including a conductive plate (31) and a winding pin (32) and a first insertion part (33) connected to the conductive plate (31). The winding pin (32) is located on one side of the conductive plate (31) along the first direction (A) and extends outward along the first direction (A). The wire end of the winding coil (2) is fixed on the winding pin (32). The first insertion part (33) is located on one side of the conductive plate (31) along the second direction (B) and extends outward along the second direction (B) and has a second insertion slot (333) provided along the second direction (B). The first direction (A) and the second direction (B) may be the same or different. The terminal block (4) includes a conductive pin (41) and a wiring pin (42). The conductive pin (41) is inserted into the second insertion slot (333) and the width of the conductive pin (41) is adapted to the second insertion slot (333) so that the conductive pin (41) and the first insertion part (33) are tightly fitted.

2. The electromagnetic coil according to claim 1, characterized in that: The first insertion part (33) has a U-shaped structure, including a first insertion plate (331) and two mating plates (332) that are separated by a certain distance and extend upward from both sides of the first insertion plate (331). A second insertion groove (333) is formed between the first insertion plate (331) and the two mating plates (332) along the second direction (B).

3. The electromagnetic coil according to claim 2, characterized in that: The inner wall of the mating plate (332) protrudes to form a fastening block (3321), and the width of the conductive pin (41) is less than the distance between the two mating plates (332) and greater than the distance between the two fastening blocks (3321).

4. The electromagnetic coil according to claim 2, characterized in that: The first direction (A) is perpendicular to the second direction (B); the first insertion slot (14) includes a first groove (141) adapted to the first insertion part (33) for insertion of the first insertion part (33) along the second direction (B) and a second groove (142) located on one side of the first groove (141) for insertion of the winding pin (32) along the second direction (B), the width of the first groove (141) being adapted to the width of the first insertion part (33) along the first direction (A).

5. The electromagnetic coil according to claim 4, characterized in that: The mating plate (332) has an inclined guide plate (3322) at the far end relative to the conductive plate (31), and the guide plates (3322) of the two mating plates (332) are arranged in a figure-eight concave distribution.

6. The electromagnetic coil according to any one of claims 1-5, characterized in that: The winding pin (32) is provided with multiple limiting bumps (321), which are distributed on both sides of the winding pin (32) to form a grid-shaped winding structure.

7. The electromagnetic coil according to any one of claims 1-5, characterized in that: The skeleton (1) includes a cylindrical skeleton body (11), an annular upper limit wall (12) extending outward from the upper end of the skeleton body (11), and an annular lower limit wall (13) extending outward from the lower end of the skeleton body (11). The upper limit wall (12) is provided with two first insertion slots (14), and the winding coil (2) is located between the upper limit wall (12) and the lower limit wall (13).

8. The electromagnetic coil according to any one of claims 1-5, characterized in that: It also includes a magnetic yoke (5), which is a U-shaped iron frame with a middle connecting plate (51) and two end limiting plates (52). The limiting plates (52) are respectively snapped onto the outer side of the upper limiting wall (12) of the frame and the lower limiting wall (13) of the frame. The middle connecting plate (51) is provided with a through hole (511) for the wiring pin (42) to pass through.

9. The electromagnetic coil according to claim 8, characterized in that: It also includes a plastic encapsulation shell (6), which is formed by encapsulating the skeleton (1), the winding coil (2), the winding terminal (3), the wiring terminal (4), and the magnetic yoke (5) assembly components.

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