Coil leading-out sheet and relay

Abstract

The utility model provides a coil leading-out sheet and a contactor. The coil leading-out sheet comprises a leading-out sheet body and a connecting part connected to the tail end of the leading-out sheet body. The connecting part is provided with at least one concave part; when the two lead-out pieces are in lap joint, the side wall of the other lead-out piece can be clamped into the concave part of the connecting part to achieve effective positioning and limiting, the consistency is good after fixing, when tin soldering is adopted for fixing, the connecting part can serve as a supporting face, the tin storage effect is achieved, the lead-out pieces are not prone to flowing during tin soldering, and the risks of insufficient soldering and unsoldering are reduced.

Description

Technical Field

[0001] The utility model relates to the field of relays, in particular to a coil lead-out piece and a relay. Background Art

[0002] A relay is a widely used switching device with the advantages of strong current breaking capability, fast action, safe operation, frequent operation and remote control.

[0003] The development of new energy vehicles is diverse, and the coil connection methods and specifications of relays used in vehicles are also increasing. Some of these leads are too thin to be easily bent normally, so they need to be split into two parts. This means overlapping the two lead pieces and securing them through methods such as soldering. However, when overlapping, the two lead pieces cannot be positioned, resulting in inconsistent connection after securing. Furthermore, soldering can easily lead to the risk of cold joints and desoldering. Utility Model Content

[0004] To this end, the utility model provides a coil lead-out piece and a relay. By designing the lead-out piece, when the two lead-out pieces are overlapped, they can play a good role in limiting the position and have good consistency after being fixed; and when soldering is used for fixing, the risks of cold soldering and desoldering are also effectively reduced.

[0005] To achieve the above purpose, the technical solutions provided by the present invention are as follows:

[0006] A coil lead-out piece comprises a lead-out piece body and a connecting portion connected to the end of the lead-out piece body; the connecting portion has at least one recess.

[0007] Furthermore, the connecting portion includes a first connecting beam, a second connecting beam and a third connecting beam, the first connecting beam and the second connecting beam are arranged opposite to each other, and the third connecting beam is connected to the middle position of the first connecting beam and the second connecting beam and forms at least one recess.

[0008] Furthermore, the third connecting beam is connected to the middle position of the first connecting beam and the second connecting beam, and forms two recessed portions arranged opposite to each other.

[0009] Furthermore, the first connecting beam, the second connecting beam and the third connecting beam form an I-shaped structure.

[0010] Furthermore, the connecting portion has two recessed portions disposed opposite to each other.

[0011] Furthermore, the end of the lead-out piece body is connected to the first connecting beam.

[0012] Furthermore, the length extension direction of the lead-out piece body is perpendicular to the length extension direction of the first connecting beam.

[0013] Furthermore, the lead-out piece body and the connecting portion are an integral connection structure.

[0014] A relay includes an electromagnetic part and a contact part cooperating with the electromagnetic part, wherein the electromagnetic part includes a coil and at least one set of coil lead pins connected to the coil; the coil lead pins include a first lead plate; the first lead plate is the coil lead plate described above.

[0015] Furthermore, the coil lead-out pin also includes a second lead-out piece; the fixed end of the second lead-out piece has a positioning notch, the third connecting beam of the connecting part of the first lead-out piece is inserted into the positioning notch of the second lead-out piece, and at least one side wall of the positioning notch of the second lead-out piece is confined in the recess of the connecting part.

[0016] Furthermore, the positioning notch at the fixed end of the second lead-out piece is a "U"-shaped notch or a "V"-shaped notch.

[0017] Furthermore, the connecting portion of the first lead-out piece and the fixed end of the second lead-out piece are fixed by soldering.

[0018] Furthermore, the electromagnetic part also includes a coil frame, the coil is wound on the coil frame, and the first lead-out piece is arranged on the coil frame.

[0019] Furthermore, the coil frame includes a first flange, a second flange and a winding shaft connected between the first flange and the second flange. The coil is wound on the winding shaft of the coil frame. The lead-out piece body of the first lead-out piece is fixed on the first flange and extends laterally out of the first flange.

[0020] Furthermore, the coil lead-out pins have multiple groups, and the first lead-out pieces of the multiple groups of coil lead-out pins are fixed side by side on the coil frame; the second lead-out pieces of the multiple groups of coil lead-out pins are fixed on the same insulating part by injection molding, and the fixed ends of the second lead-out pieces are exposed to the insulating part; the first lead-out pieces and the second lead-out pieces of the same group are fixedly matched.

[0021] Furthermore, the second lead-out piece is further provided with a pin, which is exposed from the insulating member and is used for connecting to an external device.

[0022] Furthermore, the electromagnetic part also includes a yoke and a moving iron core, and the yoke is arranged on the outside of the coil frame for magnetic conduction; the winding shaft of the coil frame has an axially penetrating center hole; the moving iron core is assembled in the center hole of the winding shaft of the coil frame; the contact part includes a ceramic cover and a moving contact assembly and a static contact assembly arranged in the ceramic cover, the moving iron core is connected to a push rod, and the push rod penetrates into the ceramic cover and is connected to the moving contact assembly to drive the moving contact assembly close to or away from the static contact assembly; the static contact of the static contact assembly extends the wiring end outside the ceramic cover.

[0023] Furthermore, the coil lead pins have two groups, and the first lead pieces of the two groups of coil lead pins are arranged side by side; on opposite sides of the two first lead pieces, the lead piece body is flush with the first connecting beam.

[0024] The technical solution provided by the utility model has the following beneficial effects:

[0025] 1. The connection portion of the lead-out tab (the first lead-out tab) is designed with at least one recess. When overlapping, the recess can constrain the other lead-out tab (the second lead-out tab), effectively positioning and limiting it, ensuring good consistency after fixation. Furthermore, when subsequently overlapping the second lead-out tab, the second lead-out tab and the recess increase contact, forming a semi-enclosed structure and increasing the effective soldering surface area of the connection. This prevents solder from flowing, improving soldering reliability and consistency and reducing the risk of cold solder joints and desoldering.

[0026] 2. The connecting portion includes a first connecting beam, a second connecting beam and a third connecting beam, and constitutes two recesses arranged opposite to each other; when the two lead-out pieces are overlapped, the third connecting beam of the connecting portion of the first lead-out piece is inserted into the positioning notch of the second lead-out piece, and the two side walls of the positioning notch of the second lead-out piece are respectively restricted in the two recesses arranged opposite to each other of the connecting portion, further enhancing the positioning and limiting effects.

[0027] 3. The lead tab's connection features a third connecting beam connected midway between the first and second connecting beams. This increases the effective solder retention area on the lead tab's connection, preventing solder from escaping during soldering. This improves soldering reliability and consistency, reducing the risk of cold solder joints and desoldering. Furthermore, when combined with the second lead tab's positioning notch, the notch can also collect some of the molten solder that may have escaped. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure shows the structure of the coil lead-out piece in the embodiment;

[0029] Figure 2The figure shows a partial structural diagram of the relay in the embodiment, wherein the first lead-out piece and the second lead-out piece are in a separated state;

[0030] Figure 3 FIG2 is a schematic structural diagram of the first lead-out piece and the second lead-out piece in the assembled state in the embodiment;

[0031] Figure 4 Shown is a top view of the relay in the embodiment;

[0032] Figure 5 Shown Figure 4 Enlarged schematic diagram of the middle C area;

[0033] Figure 6 Shown is a three-dimensional schematic diagram of a relay in the embodiment;

[0034] Figure 7 Shown Figure 6 Cross-sectional view along line AA;

[0035] Figure 8 Shown Figure 6 Cross-sectional view along the midline BB;

[0036] Figure 9 Shown is a schematic structural diagram of a coil lead-out sheet in another embodiment;

[0037] Figure 10 Shown is a schematic structural diagram of a coil lead-out piece in yet another embodiment. DETAILED DESCRIPTION

[0038] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the disclosure of this invention and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0039] In the description of the present invention, terms such as "up", "down", "left", "right", "front", and "back" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0040] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0041] Example 1

[0042] Reference Figure 1 As shown, the present embodiment provides a coil lead-out piece 1, comprising a lead-out piece body 11 and a connecting portion 12 connected to the end of the lead-out piece body 11; wherein, the connecting portion 12 has at least one recess 124; as in the present embodiment, the connecting portion 12 comprises a first connecting beam 121, a second connecting beam 122 and a third connecting beam 123, the first connecting beam 121 and the second connecting beam 122 are arranged opposite to each other, the third connecting beam 123 is connected to the middle position of the first connecting beam 121 and the second connecting beam 122, the first connecting beam 121, the second connecting beam 122 and the third connecting beam 123 constitute two recesses 124 arranged back to back; forming an "I"-shaped structure.

[0043] Specifically, the lead-out plate body 11 and the connecting portion 12 are an integrally connected structure, that is, they can be integrally formed by casting or punching. The end of the lead-out plate body 11 is connected to the first connecting beam 121; specifically, the length extension direction of the lead-out plate body 11 is perpendicular to the length extension direction of the first connecting beam 121; Figure 1 As shown, the length direction of the lead-out piece body 11 and the third connecting beam 123 is the front-to-back direction, and the length direction of the first connecting beam 121 and the second connecting beam 122 is the left-to-right direction.

[0044] Continue to refer to Figures 2 to 8 As shown, this embodiment further provides a relay comprising an electromagnetic portion and a contact portion cooperating with the electromagnetic portion. The electromagnetic portion comprises a coil bobbin 41, a coil 42, and at least one set of coil lead pins. The coil 42 is wound on the coil bobbin 41. In this specific embodiment, there are two sets of coil lead pins, and the coil 42 is connected to the two sets of coil lead pins, which serve as input and output terminals of the coil 42, respectively.

[0045] Wherein, both groups of the coil lead-out pins include a first lead-out piece 10 and a second lead-out piece 20; at the same time, the first lead-out piece 10 is the coil lead-out piece 1 described above, and the first lead-out piece 10 is arranged on the coil frame 41. As in this embodiment, the lead-out piece body 11 of the first lead-out piece 10 is integrally connected to the coil frame 41 by injection molding, and the connecting portion 12 of the first lead-out piece 10 is located on the outside of the coil frame 41; the fixed end of the second lead-out piece 20 has a positioning notch 21, specifically, the positioning notch 21 is a "U"-shaped notch (of course, in other embodiments, the positioning notch 21 can also be a notch of other shapes, such as a "V"-shaped notch, etc.); the third connecting beam 123 of the connecting portion 12 of the first lead-out piece 10 is inserted into the positioning notch 21 of the second lead-out piece 20, and the two side walls 22 of the positioning notch 21 of the second lead-out piece 20 are respectively confined in two oppositely arranged recesses 124 of the connecting portion 12; as Figures 3 to 5As shown, the third connecting beam 123 is inserted into the positioning notch 21 and is restricted by the side walls 22 on the left and right sides of the positioning notch 21, while the front and rear sides of the second lead-out piece 20 are restricted by the first connecting beam 121 and the second connecting beam 122. In this way, the first lead-out piece 10 and the second lead-out piece 20 can form effective positioning and limiting.

[0046] Furthermore, in this embodiment, the connecting portion 12 of the first lead-out piece 10 and the fixed end of the second lead-out piece 20 are fixed by soldering; in this way, the fixed connection between the first lead-out piece 10 and the second lead-out piece 20 is achieved. And by using soldering to fix, the "I"-shaped plane of the connecting portion 12 of the first lead-out piece 10 can be used as a support surface, which has the function of storing tin, and the tin is not easy to flow during soldering, which is conducive to improving the reliability and consistency of welding and reducing the risk of cold soldering and desoldering; at the same time, in conjunction with the positioning notch 21 of the second lead-out piece 20, the positioning notch of the second lead-out piece can also receive a part of the flowing tin liquid, further improving the reliability and consistency of welding. Of course, in other embodiments, after the connecting portion 12 of the first lead-out piece 10 and the fixed end of the second lead-out piece 20 are limited to each other, they can also be fixed by other means such as by adding external fixing parts.

[0047] The coil frame 41 includes a first flange 411, a second flange 412 and a winding shaft 413 connected between the first flange 411 and the second flange 412. The coil 42 is wound on the winding shaft 413 of the coil frame 41. The lead-out piece body 11 of the first lead-out piece 10 is fixed on the first flange 411 and extends laterally from the first flange 411; specifically, the first lead-out pieces 10 of the two groups of the coil lead-out pins are fixed on the first flange 411 and are arranged side by side, and the specific connection method is through injection molding.

[0048] At the same time, the second lead tabs 20 of the two groups of coil lead pins are fixed to the same insulating member 30 through injection molding, with the fixed ends of the second lead tabs 20 exposed on the insulating member 30. The first lead tabs 10 of the same group are fixedly mated with the second lead tabs 20. Specifically, the fixed ends of the second lead tabs 20 are exposed on the upper end of the insulating member 30. This arrangement allows multiple second lead tabs 20 to be fixed into a single integral structure, reducing the number of parts and facilitating assembly.

[0049] The second lead-out piece 20 is further provided with a pin 23 , and the pin 23 is exposed from the insulating member 30 ; specifically, the pin 23 is exposed from the lower end of the insulating member 30 and is used for connecting to an external device.

[0050] The first lead-out pieces 10 of the two sets of coil lead-out pins are arranged side by side; specifically, on opposite sides of the two first lead-out pieces 10, the lead-out piece body 11 is flush with the first connecting beam 121; Figure 5As shown, in the left first lead piece 10, the lead piece body 11 is flush with the right side of the first connecting beam 121; in the right first lead piece 10, the lead piece body 11 is flush with the left side of the first connecting beam 121. This arrangement ensures a large spacing between the third connecting beams 123 of the two first lead pieces 10. Even if the spacing between the lead piece bodies 11 of the two first lead pieces 10 is not large, a gap can be maintained between the two second lead pieces 20 during assembly, avoiding interference during assembly and reducing the space occupied by the lead pins.

[0051] The above-mentioned structural layout and coordination of multiple groups of coil lead-out pins are the more preferred implementation scheme in this application. Of course, other embodiments are not limited to this. For example, the number of the coil lead-out pins can also be one group or more than two groups. When multiple groups of coil lead-out pins are used, the first lead-out pieces 10 of the multiple groups of coil lead-out pins can also be set at different positions of the coil frame 41, such as being respectively set on the first flange 411 and the second flange 412; the second lead-out pieces 20 of the multiple groups of coil lead-out pins can also be set separately, etc. The structure of the above-mentioned coil lead-out piece 1 is not limited to this. For example, the end of the lead-out piece body 11 can also be connected to the middle position of the first connecting beam 121, or the lead-out piece body 11 can be connected to other positions of the connecting part 12, etc.

[0052] In this embodiment, the electromagnetic part also includes a yoke 43 and a moving iron core 44. The yoke 43 is arranged on the outside of the coil frame 41 for magnetic conduction. Specifically, the yoke 43 includes a U-shaped yoke 431 and an upper yoke plate 432. The coil frame 41 is assembled in the U-shaped yoke 431, that is, the U-shaped yoke 431 covers the bottom and left and right sides of the coil 42, and the upper yoke plate cover 432 is on the upper side of the coil frame 41 and fixed to the U-shaped yoke 431. The winding shaft 413 of the coil frame 41 has an axially extending center hole 414; the moving iron core 44 is assembled in the center hole 414 of the winding shaft 413 of the coil frame 41; wherein, the upper yoke plate 432 has a clearance hole for the moving iron core 44 to pass through. The contact portion includes a ceramic cover 51 and a moving contact assembly 52 and a static contact assembly 53 arranged in the ceramic cover 51, wherein the ceramic cover 51 is fixed above the upper yoke iron plate 432, and the moving iron core 44 penetrates into the ceramic cover 51 and is connected to the moving contact assembly 52 to drive the moving contact assembly 52 to move closer to or away from the static contact assembly 53, thereby realizing the opening and closing operation. The static contact of the static contact assembly 53 extends the connection end outside the ceramic cover 51. Figure 7As shown, an upper magnetic conductor 61 is assembled within the ceramic cover 51, and a lower magnetic conductor 62 is provided on the movable contact assembly 52. When the movable contact assembly 52 and the stationary contact assembly 53 are in contact, the upper magnetic conductor 61 and the lower magnetic conductor 62 form a magnetic circuit. When a large fault current flows through the movable contact assembly 52, the upper magnetic conductor 61 and the lower magnetic conductor 62 increase the suction force in the direction of the contact pressure. This, combined with the contact pressure, counteracts the electromotive force generated by the fault current between the movable and stationary contacts, thereby ensuring safe operation of the relay. Of course, in other embodiments, the structure of the relay is not limited to this.

[0053] Example 2

[0054] The coil lead-out plate provided in this embodiment has a structure similar to that of the first embodiment, except that: Figure 9 As shown, in this embodiment, the connecting portion 12 and the lead-out piece body 11 are of equal width, and one side of the connecting portion 12 is recessed to form the recess 124. With this arrangement, when subsequently overlapping with the second lead-out piece, one of the side walls 22 of the second lead-out piece can be positioned, and effective positioning and limiting can be achieved, resulting in good consistency after fixation. At the same time, when subsequently overlapping with the second lead-out piece, the cooperation between the second lead-out piece and the recess increases contact, forming a semi-enclosed structure, increasing the effective tin-retaining surface of the connecting portion; soldering is not easy to flow, which is beneficial to improving welding reliability and consistency, and reducing the risk of cold soldering and desoldering.

[0055] Example 3

[0056] The coil lead-out plate provided in this embodiment has a structure similar to that of the second embodiment, except that: Figure 10 As shown, in this embodiment, the connecting portion 12 and the lead-out plate body 11 are of equal width, and opposite sides of the connecting portion 12 are recessed to form the recesses 124, forming two recesses 124 disposed opposite to each other.

[0057] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes can be made to the form and details of the present invention without departing from the spirit and scope of the present invention as defined by the appended claims, and all of these changes are within the scope of protection of the present invention.

Claims

1. A coil lead-out plate, comprising a lead-out plate body and a connecting portion connected to an end of the lead-out plate body; characterized in that: The connecting portion has at least one recess.

2. The coil lead-out piece according to claim 1, characterized in that: The connecting portion includes a first connecting beam, a second connecting beam and a third connecting beam. The first connecting beam and the second connecting beam are arranged opposite to each other. The third connecting beam is connected to the middle position of the first connecting beam and the second connecting beam and forms at least one of the recesses.

3. The coil lead-out sheet according to claim 2, characterized in that: The third connecting beam is connected to the middle position of the first connecting beam and the second connecting beam, and forms two recessed portions arranged opposite to each other.

4. The coil lead-out piece according to claim 3, characterized in that: The first connecting beam, the second connecting beam and the third connecting beam form an I-shaped structure.

5. The coil lead-out piece according to claim 1, characterized in that: The connecting portion has two recessed portions that are arranged opposite to each other.

6. The coil lead-out piece according to claim 1, characterized in that: The end of the lead-out piece body is connected to the first connecting beam.

7. The coil lead-out piece according to claim 6, characterized in that: The length extension direction of the lead-out piece body is perpendicular to the length extension direction of the first connecting beam.

8. The coil lead-out piece according to claim 1, characterized in that: The lead-out piece body and the connecting portion are an integral connection structure.

9. A relay comprising an electromagnetic portion and a contact portion cooperating with the electromagnetic portion, wherein the electromagnetic portion comprises a coil and at least one set of coil lead pins connected to the coil; the coil lead pins comprise a first lead plate; and characterized in that: The first lead-out piece is the coil lead-out piece described in any one of claims 1 to 8.

10. The relay according to claim 9, characterized in that: The coil lead-out pin also includes a second lead-out piece; the fixed end of the second lead-out piece has a positioning notch, the third connecting beam of the connecting part of the first lead-out piece is inserted into the positioning notch of the second lead-out piece, and at least one side wall of the positioning notch of the second lead-out piece is confined in the recess of the connecting part.

11. The relay according to claim 10, characterized in that: The connecting portion of the first lead-out piece and the fixed end of the second lead-out piece are fixed by soldering.

12. The relay according to claim 10, wherein: The positioning notch at the fixed end of the second lead-out piece is a "U"-shaped notch or a "V"-shaped notch.

13. The relay according to claim 10, wherein: The electromagnetic part further includes a coil frame, the coil is wound on the coil frame, and the first lead-out piece is arranged on the coil frame.

14. The relay according to claim 13, wherein: The coil frame includes a first flange, a second flange and a winding shaft connected between the first flange and the second flange. The coil is wound on the winding shaft of the coil frame. The lead-out piece body of the first lead-out piece is fixed on the first flange and extends laterally out of the first flange.

15. The relay according to claim 13 or 14, characterized in that: There are multiple groups of coil lead pins, and the first lead pieces of the multiple groups of coil lead pins are fixed side by side on the coil frame; the second lead pieces of the multiple groups of coil lead pins are fixed on the same insulating member by injection molding, and the fixed ends of the second lead pieces are exposed to the insulating member; the first lead pieces and the second lead pieces of the same group are fixedly matched.

16. The relay according to claim 15, characterized in that: The second lead-out piece is further provided with a pin, which is exposed from the insulating member and is used for connecting to an external device.

17. The relay according to claim 13, wherein: The electromagnetic part also includes a yoke and a moving iron core, and the yoke is arranged on the outside of the coil frame for magnetic conduction; the winding shaft of the coil frame has an axially penetrating center hole; the moving iron core is assembled in the center hole of the winding shaft of the coil frame; the contact part includes a ceramic cover and a moving contact assembly and a static contact assembly arranged in the ceramic cover, the moving iron core is connected to a push rod, and the push rod penetrates into the ceramic cover and is connected to the moving contact assembly to drive the moving contact assembly close to or away from the static contact assembly; the static contact of the static contact assembly extends a wiring end outside the ceramic cover.

18. The relay according to claim 10, wherein: There are two groups of coil lead pins, and the first lead pieces of the two groups of coil lead pins are arranged side by side; on opposite sides of the two first lead pieces, the lead piece body is flush with the first connecting beam.

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