Coil part of relay and electromagnetic relay

Abstract

The utility model discloses a coil part of a relay and an electromagnetic relay, the coil part comprises a coil rack and a plurality of coil leading-out sheets, each coil leading-out sheet comprises an insertion sheet and a leading-out pin arranged on the insertion sheet, and the insertion sheets of the coil leading-out sheets are respectively inserted into slots correspondingly arranged on the coil rack; a limiting structure is matched between at least one side face of the inserting piece in the thickness direction and the corresponding inner side face of the inserting groove, and the limiting structure limits displacement of the coil leading-out piece in the length direction of the inserting groove. According to the utility model, when the lead-out pin is stressed on any side in the length direction of the slot, the coil lead-out sheet is not twisted, so that the position change of the coil lead-out sheet in the coil production and turnover process is reduced, the yield of the distance between the lead-out pins is improved, and the risk of breakage of an enameled wire is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a coil part of a relay and an electromagnetic relay. Background Art

[0002] At present, the coil lead-out pieces of relays in the prior art are generally installed and fixed by plug-in, specifically, the plug-in piece part of the coil lead-out piece is inserted into the corresponding slot on the coil frame, and the plug-in piece part of the coil lead-out piece is mainly used to achieve the top limit by the clamping bud and / or boss set on the side and the inner side of the slot. For miniaturized relays, the slot on its coil frame is usually shallow, and the lead-out pin of the coil lead-out piece is relatively long. Once the lead-out pin is stressed on one side in the length direction of the slot (the lead-out pin of the coil lead-out piece is stressed during the production of the coil part, such as the paint winding, head bending, and coil turnover), it is easy to cause the coil lead-out piece to twist, resulting in a change in the position of the coil lead-out piece. The position of the coil lead-out piece changes during the coil winding and turnover process, and there is a risk of unqualified lead-out pin spacing and broken enameled wire. Utility Model Content

[0003] The utility model aims at the technical problems existing in the prior art and provides a coil part of a relay and an electromagnetic relay, which improve the force resistance and torsion resistance of the lead pins through structural improvement.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a coil part of a relay, including a coil frame, a plurality of coil lead-out pieces, each coil lead-out piece includes an insert and a lead-out pin arranged on the insert, and the insert of each coil lead-out piece is respectively inserted into a slot corresponding to the coil frame; it is characterized in that: a limiting structure is matched between at least one side surface of the insert in the thickness direction and the inner side surface corresponding to the slot, and the limiting structure limits the displacement of the coil lead-out piece along the length direction of the slot.

[0005] Furthermore, the limiting structure includes a limiting protrusion and a limiting groove, the limiting protrusion is arranged on one of the side surface of the plug-in piece and the inner side surface of the slot, and the limiting groove is arranged on the other side surface of the plug-in piece and the inner side surface of the slot, and the limiting protrusion is inserted into the limiting groove along the insertion direction of the plug-in piece.

[0006] Furthermore, the limiting protrusion is a rib structure extending along the insertion direction of the inserting piece; when the limiting groove is arranged on the inner side surface of the slot, the limiting groove leads to the notch of the slot.

[0007] Furthermore, the insert is provided with a boss on at least one side in the thickness direction, and the boss abuts against the inner side surface corresponding to the slot; the limiting protrusion is provided on the side of the insert and is located on a different side of the insert as the boss, or the limiting protrusion and the boss are located on the same side of the insert, and the maximum protrusion of the limiting protrusion relative to the side on which it is located is greater than the maximum protrusion of the boss relative to the side on which it is located.

[0008] Furthermore, the boss is provided with a guiding slope at one end in the inserting direction of the insert, so as to provide guidance when the insert is inserted into the slot.

[0009] Furthermore, the insert is provided with a clamping bud on two side surfaces in the length direction thereof, respectively, and the clamping bud abuts against the inner side surface corresponding to the slot.

[0010] Furthermore, the coil lead-out piece also includes a lead-out pin and a winding rod arranged on the plug-in piece, the coil frame is wound with enameled wire, and each end of the enameled wire is respectively wound around the winding rod connected to the corresponding coil lead-out piece, and the coil frame is provided with lead grooves at each end corresponding to the enameled wire.

[0011] Furthermore, the lead-out pin is located on one side of the plug-in in the length direction and extends in a direction opposite to the insertion direction of the plug-in; the winding rod is located on the other side of the plug-in in the length direction and extends in the length direction of the plug-in, and a bending weakening groove is provided between the winding rod and the plug-in to facilitate the winding rod to bend to one side of the plug-in in the thickness direction.

[0012] Furthermore, the coil frame includes two flange portions and a winding reel arranged between the two flange portions, wherein one of the flange portions is provided with the slot; it also includes an iron core, which is integrally insert-molded with the coil frame; the iron core includes two contact portions and a core rod located between the two contact ends, the core rod is located in the winding reel, the two contact portions are provided with two pole shoe surfaces arranged back to back, and the arrangement direction of the two pole shoe surfaces is perpendicular to the axial direction of the winding reel.

[0013] The utility model further provides an electromagnetic relay, comprising the coil part of the relay as described in the utility model.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. Since the insert of the utility model is equipped with a limiting structure between at least one side surface in the thickness direction and the inner side surface corresponding to the slot, the limiting structure limits the displacement of the coil lead-out piece along the length direction of the slot, which can greatly improve the insertion strength of the insert and the slot in the length direction of the slot, so that when the lead-out pin is subjected to force on either side in the length direction of the slot, the coil lead-out piece will not be twisted, thereby reducing the position change of the coil lead-out piece during the coil production and turnover process, improving the qualified rate of the lead-out pin spacing, and reducing the risk of enameled wire breakage.

[0016] 2. The limiting structure includes a limiting convex part and a limiting groove, wherein the limiting convex part is provided on one of the side surface of the insert and the inner side surface of the slot, and the limiting groove is provided on the other of the side surface of the insert and the inner side surface of the slot, so that the limiting structure design is simpler and easy to produce. In particular, the limiting convex part is a rib structure extending along the insertion direction of the insert, so that the limiting structure has a better limiting effect on the coil lead-out piece in the length direction of the slot.

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments; however, the coil portion of a relay and the electromagnetic relay of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an exploded schematic diagram of the coil part of the utility model;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the coil lead-out sheet of the utility model;

[0020] Figure 3 It is a side view of the coil lead-out sheet of the utility model;

[0021] Figure 4 It is a top view of the coil frame of the utility model;

[0022] Figure 5 yes Figure 4 A magnified schematic diagram of part A;

[0023] Figure 6 It is a three-dimensional structural schematic diagram of the coil part of the utility model;

[0024] Figure 7 It is a front view of the coil part of the utility model;

[0025] Figure 8 yes Figure 7 BB cross-sectional view;

[0026] Fig. 9 yes Figure 8 A magnified schematic diagram of part C;

[0027] Fig.10 It is an exploded schematic diagram of the electromagnetic relay of the utility model;

[0028] In the figure, 1, coil frame, 11, winding drum, 12, flange part, 121, slot, 122, lead groove, 123, limiting groove, 2, coil lead-out piece, 21, insert piece, 211, limiting convex part, 212, boss, 213, clamping bag, 214, bending weakened groove, 22, lead-out pin, 23, winding rod, 3, iron core, 4, enameled wire, 5, armature part, 6, contact part, 7, push card, 8, shell, 9, base, 10, cover plate. DETAILED DESCRIPTION

[0029] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0030] See also Figure 1-Figure 9 As shown, the coil part of a relay of the utility model includes a coil frame 1, an enameled wire 4, an iron core 3 and a plurality of coil lead-out sheets 2, and the iron core 3 and the coil frame 1 are integrally insert-molded by injection molding. The coil lead-out sheet 2 includes an insert sheet 21, and a lead-out pin 22 and a winding rod 23 provided on the insert sheet 21. The number of coil lead-out sheets 2 is specifically two, but not limited to this. In other embodiments, the number of coil lead-out sheets is three. The insert sheets 21 of the two coil lead-out sheets 2 are respectively inserted one by one into the two slots 121 correspondingly provided on the coil frame 1. The enameled wire 4 is wound around the coil frame 1, and the two ends of the enameled wire 4 are respectively wound and fixed on the winding rods 23 of the two coil lead-out sheets 2. The coil frame 1 specifically includes two flange portions 12 and a winding drum 11 provided between the two flange portions 12, wherein one of the flange portions 12 is provided with the above-mentioned two slots 121, and the enameled wire 4 is wound around the winding drum 11.

[0031] In this embodiment, a limiting structure is provided between at least one side surface of the inserting piece 21 in the thickness direction and the inner side surface corresponding to the slot 121, and the limiting structure limits the displacement of the coil lead-out piece 2 along the length direction of the slot 121. The length direction of the slot 121 is Figure 1 The direction of the Y axis in the three-dimensional coordinate system is also the axial direction of the coil frame 1, but the length direction of the slot 121 and the axial direction of the coil frame 1 are not limited to the same direction, and the two can also be perpendicular to each other. Figure 1 The inserting piece 21 of the coil lead-out piece 2 is inserted into the slot 121 along the depth direction of the slot 121. The width direction of the slot 121 is Figure 1 In the direction of the X-axis in the three-dimensional coordinate system, when the insert 21 is inserted into the slot 121 , the thickness direction of the insert 21 is consistent with the width direction of the slot 121 , and the length direction of the insert 21 is consistent with the length direction of the slot 121 .

[0032] Preferably, the limiting structure includes a limiting protrusion 211 and a limiting groove 123, wherein the limiting protrusion 211 is provided on one of the side surface of the inserting piece 21 and the inner surface of the slot 121, and the limiting groove 123 is provided on the other of the side surface of the inserting piece 21 and the inner surface of the slot 121, and the limiting protrusion 211 is inserted into the limiting groove 123 along the insertion direction of the inserting piece 21. Specifically, in the present embodiment, the limiting protrusion 211 is provided on the side surface of the inserting piece 21 and is formed by stamping, and the limiting protrusion 211 is a rib structure extending along the insertion direction of the inserting piece 21; the limiting groove 123 is provided on the inner surface of the slot 121, and the limiting groove 123 leads to the notch of the slot 121.

[0033] In this embodiment, at least one side surface of the insert 21 in the thickness direction is provided with a boss 212, and the boss 212 abuts against the inner side surface corresponding to the slot 121, so as to prevent the insert 21 from shaking in the width direction of the slot 121. The insert 21 is also formed by stamping the boss 212, and the boss 212 and the above-mentioned limiting protrusion 211 are located on the same side surface of the insert 21. In order to prevent the boss 212 from affecting the limiting protrusion 211 from being inserted into the limiting groove 123, the maximum protrusion of the limiting protrusion 211 relative to the side surface where it is located is greater than the maximum protrusion of the boss 212 relative to the side surface where it is located. In other embodiments, the boss 212 and the limiting protrusion 211 are located on different sides of the insert 21. In this case, the protrusion of the boss 212 does not need to be less than the protrusion of the limiting protrusion 211.

[0034] One end of the boss 212 in the insertion direction of the inserting piece 21 is provided with a guiding slope to provide guidance when the inserting piece 21 is inserted into the slot 121 .

[0035] In this embodiment, the insert 21 is provided with a clamping lug 213 on two side surfaces in the length direction thereof, and the clamping lug 213 abuts against the corresponding inner side surface of the slot 121, that is, the clamping lug 213 abuts against the inner side surface of the slot 121 in the length direction, thereby preventing the insert 21 from shaking in the length direction of the slot 121.

[0036] In this embodiment, the two slots 121 have the same structure and are symmetrically designed. The two coil lead-out plates 2 have the same structure, so that the two coil lead-out plates 2 can share the same parts, which is conducive to reducing costs. The coil frame 1 is provided with lead grooves 122 at both ends of the enameled wire 4, which can prevent the winding heads of the two ends of the enameled wire 4 from being higher than the surface of the coil frame 1, thereby reducing the risk of scratching the enameled wire 4 during assembly and parts turnover.

[0037] In this embodiment, the lead pin 22 is located on one side of the plug-in sheet 21 in the length direction and extends in a direction opposite to the insertion direction of the plug-in sheet 21; the winding rod 23 is located on the other side of the plug-in sheet 21 in the length direction and extends in the length direction of the plug-in sheet 21, and a bending weakening groove 214 is provided between the winding rod 23 and the plug-in sheet 21, so that the bending position is more stable and it is also convenient for the winding rod 23 to be bent to one side of the plug-in sheet 21 in the thickness direction.

[0038] In this embodiment, the iron core 3 includes two contact parts and a core rod located between the two contact parts, the core rod is located in the winding drum 11, the two contact parts are respectively fixed on the two flange parts 12 of the coil frame 1, and the two contact parts are respectively provided with two pole shoe surfaces arranged back to back, and the arrangement direction of the two pole shoe surfaces is perpendicular to the axial direction of the winding drum 11. Specifically, the iron core 3 is roughly U-shaped, and the two contact parts of the iron core 3 correspond to the two side edges of the U-shape, and the core rod of the iron core 3 corresponds to the bottom edge of the U-shape.

[0039] The coil part of the relay of the utility model, the coil lead-out piece 2 cooperates with the limit groove 123 on the inner side of the slot 121 through the limit convex part 211, which can improve the assembly strength of the coil lead-out piece 2, so that the lead-out pin 22 is subjected to a force F (such as Figure 7 As shown in the figure), the coil lead sheet 2 will not be twisted (the twisting direction is as shown in the figure). Figure 7 As shown by the arc arrow in the figure), the position change of the coil lead-out piece 2 during the coil production and turnover process is reduced, the qualified rate of the lead-out pin 22 spacing is improved, and the risk of the enameled wire 4 breaking is reduced.

[0040] See also Fig.10 As shown, an electromagnetic relay of the utility model includes the coil part of the relay of the utility model as mentioned above.

[0041] In this embodiment, the utility model further comprises a base 9, a shell 8, a contact part 6, an armature part 5, and a cover plate 10. The above-mentioned coil part is installed in the base 9 from bottom to top. The armature part 5 is rotatably connected to the base 9, and the armature part 5 is roughly in an I-shape, and four snap-fit ​​parts are formed corresponding to the four ends of the I-shape. The opposite inner sides of the two snap-fit ​​parts located on the same side are respectively pole shoe surfaces, and the two snap-fit ​​parts are one large and one small, and the armature part 5 is a central symmetrical structure. The two contact parts of the iron core 3 are respectively matched in the grooves formed on both sides of the armature part 5 corresponding to the I-shape, and each snap-fit ​​part is respectively matched with the movable spring part of each group of contacts of the contact part 6 through the push card 7. The shell 8 is connected to the base 9, and the armature part 5, the push card 7, and the contact part 6 are contained in its shell cavity. The cover plate 10 is connected to the bottom end of the base 9 to cover the coil part.

[0042] The coil part of a relay and an electromagnetic relay of the utility model, and the unrelated parts are the same as those in the prior art or can be implemented by adopting the prior art.

[0043] The above embodiments are only used to further illustrate the coil part of a relay and the electromagnetic relay of the utility model, but the utility model is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model fall within the protection scope of the technical solution of the utility model.

Claims

1. A coil part of a relay, comprising a coil frame and a plurality of coil lead-out pieces, each coil lead-out piece comprises an insert piece and a lead-out pin provided on the insert piece, and the insert piece of each coil lead-out piece is respectively inserted into a slot corresponding to the coil frame; characterized in that: A limiting structure is provided between at least one side surface of the inserting piece in the thickness direction and the inner side surface corresponding to the slot, and the limiting structure limits the displacement of the coil lead-out piece along the length direction of the slot.

2. The coil portion of the relay according to claim 1, characterized in that: The limiting structure includes a limiting protrusion and a limiting groove. The limiting protrusion is arranged on one of the side surface of the plug-in piece and the inner side surface of the slot, and the limiting groove is arranged on the other side surface of the plug-in piece and the inner side surface of the slot. The limiting protrusion is inserted into the limiting groove along the insertion direction of the plug-in piece.

3. The coil portion of the relay according to claim 2, characterized in that: The limiting protrusion is a rib structure extending along the insertion direction of the inserting piece; when the limiting groove is arranged on the inner side of the slot, the limiting groove leads to the notch of the slot.

4. The coil portion of the relay according to claim 2 or 3, characterized in that: The insert is provided with a boss on at least one side in the thickness direction, and the boss abuts against the inner side surface corresponding to the slot; the limiting protrusion is provided on the side of the insert and is located on a different side of the insert as the boss, or the limiting protrusion and the boss are located on the same side of the insert, and the maximum protrusion of the limiting protrusion relative to the side on which it is located is greater than the maximum protrusion of the boss relative to the side on which it is located.

5. The coil portion of the relay according to claim 4, characterized in that: The boss is provided with a guiding slope at one end in the inserting direction of the insert piece, so as to provide guidance when the insert piece is inserted into the slot.

6. The coil portion of a relay according to any one of claims 1 to 3, characterized in that: The inserting piece is provided with a clamping bud on two side surfaces in the length direction thereof, respectively, and the clamping bud abuts against the inner side surface corresponding to the slot.

7. The coil portion of the relay according to claim 1, characterized in that: The coil lead-out piece also includes a winding rod arranged on the inserting piece, the coil frame is wound with enameled wire, each end of the enameled wire is respectively wound around the winding rod connected to the corresponding coil lead-out piece, and the coil frame is provided with lead grooves at each end corresponding to the enameled wire.

8. The coil portion of the relay according to claim 7, characterized in that: The lead-out pin is located on one side of the plug-in sheet in the length direction and extends in a direction opposite to the insertion direction of the plug-in sheet; the winding rod is located on the other side of the plug-in sheet in the length direction and extends in the length direction of the plug-in sheet, and a bending weakening groove is provided between the winding rod and the plug-in sheet to facilitate the winding rod to bend to one side of the plug-in sheet in the thickness direction.

9. The coil portion of the relay according to claim 1, characterized in that: The coil frame includes two flange parts and a winding drum arranged between the two flange parts, one of the flange parts is provided with the slot; it also includes an iron core, which is integrally insert-molded with the coil frame; the iron core includes two contact parts and a core rod located between the two contact ends, the core rod is located in the winding drum, the two contact parts are provided with two pole shoe surfaces arranged back to back, and the arrangement direction of the two pole shoe surfaces is perpendicular to the axial direction of the winding drum.

10. An electromagnetic relay, characterized in that: The invention comprises the coil portion of the relay according to any one of claims 1 to 9.

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