Coil wiring structure of contactor and contactor

Abstract

The coil wiring structure of the contactor comprises a coil framework and at least one first elastic piece, a support is arranged on the coil framework, the support is provided with a first installation cavity used for installing the first elastic piece, and a fixing block with a fixing hole is arranged in the first installation cavity. The first elastic sheet comprises a first wiring part, a first connecting part and a first mounting part used for being inserted into the fixing hole, and a clamping hook is arranged at one end, extending out of the fixing hole, of the first mounting part; during installation, the first installation part of the first elastic piece is inserted into the fixing hole, and the clamping hook is used for hooking the fixing block after penetrating out of the fixing hole. The contactor comprises the coil wiring structure. According to the coil wiring structure of the contactor and the contactor provided by the utility model, the fixed block is reversely hooked by the clamping hook, so that the first elastic sheet is firmly fixed on the bracket of the coil framework, and meanwhile, the first elastic sheet is supported to smoothly wind and bear the pressure of the auxiliary reed without skewing, so that the reliability of coil wiring is improved.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, and particularly relates to a coil wiring structure of a contactor and a contactor. Background Art

[0002] The coil wiring structure of the existing DC contactor has defects such as insecure installation and unreliable positioning of the coil spring piece, resulting in unreliable coil wiring.

[0003] In addition, when the coil is connected to the auxiliary contact, the two sides are respectively welded to the ceramic through lead wires and then the wires are connected, which has low efficiency and high cost. In addition, the coil spring piece is connected to the lead wire on one side, and it is easy to have a virtual connection, resulting in product failure. Summary of the Invention

[0004] The purpose of the utility model is to overcome at least one defect of the existing technology, and provide a coil wiring structure of a contactor and a contactor.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The coil wiring structure of the contactor includes a coil skeleton and at least one first spring piece. A bracket is provided on the coil skeleton, and a first installation cavity for installing the first spring piece is provided on the bracket. A fixing block with a fixing hole is provided in the first installation cavity. The first spring piece includes a first wiring portion, a first connection portion, and a first installation portion for inserting into the fixing hole. A hook is provided at one end of the first installation portion extending out of the fixing hole; during installation, the first installation portion of the first spring piece is inserted into the fixing hole, and the hook is used to pass through the fixing hole and hook the fixing block.

[0007] Optionally, an avoidance hole corresponding to the hook is provided at one end of the first installation portion. The hook is inclined, with one end connected in the avoidance hole and the other end extending out of the avoidance hole and used to hook the fixing block.

[0008] Optionally, a stop step is provided on the side wall of the fixing hole, and a stop piece is provided on the first installation portion. The stop step and the stop piece are in a resisting fit in the insertion direction of the first installation portion.

[0009] Optionally, the side of the first installation portion is bent to form the stop piece. An avoidance position communicating with the fixing hole and used for avoiding the stop piece is provided on the side wall of the fixing hole, and the stop step is formed at the avoidance position on the side wall of the fixing hole.

[0010] Optionally, the first installation portion and the first wiring portion are arranged side by side. One end side of the first wiring portion extends to be connected with the side of the first installation portion and is placed in the avoidance notch of the fixing block. The other end of the first wiring portion is an I-shaped structure for winding wires.

[0011] Optionally, the first connecting portion is a barb structure protruding from the first installation cavity, having a hook portion, and the side of the first connecting portion facing away from the hook portion is a contact surface.

[0012] Optionally, it further includes a second elastic piece, which includes a second wiring portion, a second connecting portion, and a second installation portion. A clamping hole is provided on the second installation portion. The bracket is provided with a second installation cavity for installing the second elastic piece. A convex hull that is clamped and matched with the clamping hole is provided in the second installation cavity, and the protruding direction of the convex hull is perpendicular to the installation direction of the second elastic piece.

[0013] Optionally, a support platform connected between the two side walls of the second installation cavity is provided in the second installation cavity. A limiting platform spaced from the side wall of the second installation cavity is provided on the support platform. The second installation portion is a U-shaped structure. The second installation portion is placed on the support platform, and its two sides are respectively clamped into the gaps between the limiting platform and the two side walls of the second installation cavity.

[0014] Optionally, the second wiring portion, the second installation portion, and the second connecting portion are arranged in a row, and the second installation portion is connected between the second wiring portion and the second connecting portion; the end of the second wiring portion is an I-shaped structure for winding wires.

[0015] Optionally, the second connecting portion includes two clamping pieces that are symmetrically and spaced apart, and the middle parts of the two clamping pieces are relatively close to each other, and the two ends are relatively far away from each other.

[0016] Optionally, the coil bobbin includes a bobbin body and two bobbin flanges arranged at the upper and lower ends of the bobbin body. The bobbin body is a circular ring columnar structure with an axial hole, and the bobbin flange is a dish-shaped structure with a high middle and a low periphery. The bracket is arranged on the bobbin flange at the upper end of the bobbin body.

[0017] A contactor includes the coil wiring structure according to any one of the above.

[0018] Optionally, it includes a starting coil, a holding coil, a lead wire, and two auxiliary spring pieces. The starting coil is sleeved on the coil bobbin, and the holding coil is sleeved on the starting coil; the coil wiring structure includes two first elastic pieces and one second elastic piece. The two first elastic pieces are symmetrically arranged on both sides of the second elastic piece. The first wiring portion of one first elastic piece is connected to one end of the starting coil, and its first connecting portion is connected to one auxiliary spring piece. The first wiring portion of the other first elastic piece is connected to one end of the holding coil, and its first connecting portion is connected to the other auxiliary spring piece. The second wiring portion of the second elastic piece is connected to the other ends of the starting coil and the holding coil, and its second connecting portion is connected to the lead wire.

[0019] The coil wiring structure and contactor of the present utility model achieve firmly fixing the first elastic piece on the bracket of the coil skeleton by the hook reversely hooking the fixing block. Meanwhile, it supports the first elastic piece to wind the wire smoothly and bear the pressure of the auxiliary spring piece without skew, improving the reliability of coil wiring.

[0020] In addition, elastic abutment is adopted between the first elastic piece and the auxiliary spring piece, improving production efficiency and reducing costs.

[0021] In addition, the convex hull and the card hole cooperate to fix the second elastic piece in the second installation cavity, preventing the second elastic piece from coming out and improving the installation firmness of the second elastic piece. When the lead wire is inserted, the two clamping pieces separate and generate elastic force to clamp the lead wire, preventing virtual connection and making the lead wire contact the second elastic piece reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the assembly drawing of the coil skeleton, elastic piece and coil of the present utility model;

[0023] Figure 2 is the exploded view of the coil skeleton, elastic piece and coil of the present utility model;

[0024] Figure 3 is the structural schematic diagram of the coil skeleton of the present utility model;

[0025] Figure 4 is the structural schematic diagram of the first elastic piece of the present utility model;

[0026] Figure 5 is the structural schematic diagram of the second elastic piece of the present utility model.

[0027] Coil skeleton 1; bracket 11; first installation cavity 111; fixing hole 112; fixing block 113; avoidance notch 114; second installation cavity 115; convex hull 116; support platform 117; limit platform 118; skeleton body 12; skeleton flange 13; start coil 2; hold coil 3; first elastic piece 4; first wiring part 41; first connection part 42; hook part 421; contact surface 422; first installation part 43; hook 44; avoidance hole 45; stop piece 46; second elastic piece 5; second wiring part 51; second connection part 52; clamping piece 521; second installation part 53; card hole 531. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following embodiments given in conjunction with the drawings further illustrate the specific embodiments of the coil wiring structure and contactor of the present utility model. The coil wiring structure and contactor of the present utility model are not limited to the descriptions of the following embodiments.

[0029] As Figures 1-4As shown, the contactor of this embodiment includes a novel coil wiring structure. The coil wiring structure of the contactor includes a coil bobbin 1 and at least one first elastic piece 4. The first elastic piece 4 is used to assist in coil wiring and is connected between the lead-out end of the coil and the auxiliary spring piece. A bracket 11 is provided on the coil bobbin 1. The bracket 11 is provided with a first installation cavity 111 for installing the first elastic piece 4. A fixing block 113 with a fixing hole 112 is provided in the first installation cavity 111. The first elastic piece 4 includes a first wiring portion 41 for winding the lead-out end of the coil, a first connection portion 42 for connecting the auxiliary spring piece, and a first installation portion 43 for inserting into the fixing hole 112. A catch 44 is provided at one end of the first installation portion 43 that extends out of the fixing hole 112. During installation, the first installation portion 43 of the first elastic piece 4 is inserted into the fixing hole 112, and the catch 44 is used to hook the fixing block 113 in the opposite direction of the insertion direction of the first installation portion 43 after passing through the fixing hole 112, so that the first installation portion 43 cannot escape from the fixing hole 112. The coil wiring structure and the contactor of the contactor of this embodiment realize firmly fixing the first elastic piece 4 on the bracket 11 of the coil bobbin 1 by the catch 44 hooking the fixing block 113 in the reverse direction. At the same time, the first elastic piece 4 is supported to be able to wind the wire smoothly and bear the pressure of the auxiliary spring piece without being skewed, improving the reliability of the coil wiring.

[0030] As Figure 3 and Figure 4As shown, in this embodiment, for the mounting structure of the first elastic piece 4, a stop step is provided on the side wall of the fixing hole 112, and a stop piece 46 is provided on the first mounting portion 43. The stop step and the stop piece 46 are in abutting cooperation in the insertion direction of the first mounting portion 43, playing a role in mounting positioning and limiting. Specifically, the side of the first mounting portion 43 is bent to form the stop piece 46, and an avoidance position communicating with the fixing hole 112 and for avoiding the stop piece 46 is provided on the side wall of the fixing hole 112, and the stop step is formed at the avoidance position on the side wall of the fixing hole 112. The first mounting portion 43 of the first elastic piece 4 for fixing and the stop piece 46 form a bent sheet-like structure. Correspondingly, the fixing hole 112 and the avoidance position form a bent hole structure, making the installation of the first elastic piece 4 more firm. An avoidance hole 45 corresponding to the hook 44 is provided at one end of the first mounting portion 43. The hook 44 is inclined, one end is connected in the avoidance hole 45, and the other end extends out of the avoidance hole 45 and is used for hooking the fixing block 113. During the installation of the first elastic piece 4, when one end of the first mounting portion 43 is inserted into the fixing hole 112, the hook 44 is deformed by extrusion so that the other end of the hook 44 is received in the avoidance hole 45; when one end of the first mounting portion 43 passes through the fixing hole 112, the hook 44 returns to its original state so that the other end of the hook 44 extends out of the avoidance hole 45 and hooks the fixing block 113. At this time, the stop piece 46 abuts against the stop step so that the first mounting portion 43 cannot be inserted further, and the installation is in place. The structure of the hook 44 is simple, which is convenient for the installation of the first elastic piece 4 and can firmly hook the fixing block 113 to prevent the first elastic piece 4 from coming out.

[0031] As Figure 3 and Figure 4 shown, in this embodiment, for the specific structure of the first elastic piece 4, the first mounting portion 43 and the first wiring portion 41 are arranged side by side. One end side of the first wiring portion 41 extends to be connected with the side of the first mounting portion 43 and is placed in the avoidance notch 114 of the fixing block 113. The other end of the first wiring portion 41 is an I-shaped structure for winding wires. The first connecting portion 42 is a barb structure provided at the other end of the first mounting portion 43 and extending out of the first mounting cavity 111, having a hook portion 421. The side of the first connecting portion 42 facing away from the hook portion 421 is a contact surface 422 for elastically contacting and connecting with the auxiliary spring piece. Elastic abutment is adopted between the first elastic piece 4 and the auxiliary spring piece (i.e., the commonly called auxiliary contact), which improves production efficiency and reduces costs.

[0032] As Figure 3 and Figure 5As shown in the figure, the coil wiring structure of the contactor in this embodiment further includes a second elastic piece 5 for assisting in coil wiring, which is connected between the lead-out end of the coil and the lead-out wire. The second elastic piece 5 includes a second wiring portion 51 for winding the lead-out end of the coil, a second connection portion 52 for connecting the lead-out wire, and a second mounting portion 53. A clamping hole 531 is provided on the second mounting portion 53. The bracket 11 is provided with a second mounting cavity 115 for mounting the second elastic piece 5. A convex protrusion 116 that is engaged with the clamping hole 531 is provided in the second mounting cavity 115. The protruding direction of the convex protrusion 116 is perpendicular to the mounting direction of the second elastic piece 5. The convex protrusion 116 and the clamping hole 531 in this embodiment are preferably circular, and can also be square or other shapes. The convex protrusion 116 and the clamping hole 531 cooperate with each other to fix the second elastic piece 5 in the second mounting cavity 115, prevent the second elastic piece 5 from coming out, and improve the mounting firmness of the second elastic piece 5.

[0033] Furthermore, a support platform 117 connected between the two side walls of the second mounting cavity 115 is provided in the second mounting cavity 115. A limiting platform 118 spaced from the side wall of the second mounting cavity 115 is provided on the support platform 117. The second mounting portion 53 is a U-shaped structure. The second mounting portion 53 is placed on the support platform 117, and its two sides are respectively clamped into the gaps between the limiting platform 118 and the two side walls of the second mounting cavity 115. The mounting firmness of the second elastic piece 5 is further improved.

[0034] As Figure 5 shown in the figure, the specific structure of the second elastic piece 5 in this embodiment. The second wiring portion 51, the second mounting portion 53, and the second connection portion 52 are arranged in a row. The second mounting portion 53 is connected between the second wiring portion 51 and the second connection portion 52. The end of the second wiring portion 51 is an I-shaped structure for winding the wire. The second connection portion 52 includes two clamping pieces 521 that are symmetrically and spaced apart. The two clamping pieces 521 are respectively connected to the two side tops of the U-shaped second mounting portion 53. There is a wiring gap for connecting the lead-out wire between the two clamping pieces 521. The middle parts of the two clamping pieces 521 are relatively close to each other, and the two ends are relatively far from each other, so that the wiring gap first becomes narrower and then wider along the wiring direction of the lead-out wire (the downward direction in the figure). When the lead-out wire is inserted, the two clamping pieces 521 separate and generate an elastic force to clamp the lead-out wire, preventing virtual connection and making the lead-out wire in reliable contact with the second elastic piece 5.

[0035] As Figure 3As shown in the figure, the specific structure of the coil bobbin 1 in this embodiment. The coil bobbin 1 includes a bobbin body 12 and two bobbin flanges 13 provided at the upper and lower ends of the bobbin body 12. The bobbin body 12 is a circular ring columnar structure with an axial hole. The axial hole in the middle of the bobbin body 12 is used to accommodate the moving parts of the contactor, and a coil is wound around the outside of the bobbin body 12. The bobbin flange 13 is a dish-shaped structure with a high middle and a low periphery. The bracket 11 is arranged on the top surface of the bobbin flange 13 at the upper end of the bobbin body 12. Since the periphery of the bobbin flange 13 deforms severely after the coil is wound, the bobbin flange 13 adopts a dish-shaped structure, which can reduce the degree of coil deformation.

[0036] As Figure 1 , Figure 2 and Figure 3 shown, a specific application embodiment of the coil wiring structure of the contactor. The contactor in this embodiment includes a start coil 2, a holding coil 3, lead wires, and two auxiliary reeds. The start coil 2 is sleeved on the coil bobbin 1, and the holding coil 3 is sleeved on the start coil 2; the coil wiring structure includes two first elastic pieces 4 and a second elastic piece 5. The two first elastic pieces 4 are symmetrically arranged on both sides of the second elastic piece 5. The first wiring part 41 of one first elastic piece 4 is connected to one end of the start coil 2, and its first connecting part 42 is connected to one auxiliary reed. The first wiring part 41 of the other first elastic piece 4 is connected to one end of the holding coil 3, and its first connecting part 42 is connected to the other auxiliary reed. The second wiring part 51 of the second elastic piece 5 is connected to the other end of the start coil 2 and the other end of the holding coil 3, and its second connecting part 52 is connected to the lead wire for external connection; wherein the other auxiliary reed (i.e., the auxiliary reed connected to one end of the holding coil 3 through the first elastic piece 4) is also used for external connection. It should be noted that the coil in this embodiment adopts a double-coil structure composed of the start coil 2 and the holding coil 3. When the contactor starts, the start coil 2 and the holding coil 3 work; when the contactor works stably, the two auxiliary reeds are disconnected to make the start coil 2 stop working, so that the start coil 2 inside the holding coil 3 no longer generates heat, and the holding coil 3 outside the start coil 2 works for heat dissipation. Of course, the coil wiring structure of the contactor can also be applied to the single-coil structure of the contactor.

[0037] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when it is commonly placed during use. It is only for the convenience of description and does not indicate that the device or element referred to must have a specific orientation. Therefore, it cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating relative importance.

[0038] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A coil connection structure of a contactor, comprising a coil frame (1) and at least one first spring piece (4), wherein a bracket (11) is provided on the coil frame (1), and the bracket (11) is provided with a first installation cavity (111) for installing the first spring piece (4), characterized in that: A fixing block (113) with a fixing hole (112) is provided in the first installation cavity (111); the first spring piece (4) comprises a first wiring portion (41), a first connecting portion (42) and a first installation portion (43) for inserting into the fixing hole (112); a hook (44) is provided on one end of the first installation portion (43) extending out of the fixing hole (112); during installation, the first installation portion (43) of the first spring piece (4) is inserted into the fixing hole (112), and the hook (44) is used to hook the fixing block (113) after passing through the fixing hole (112).

2. The coil connection structure of the contactor according to claim 1, characterized in that: An avoidance hole (45) corresponding to the hook (44) is provided on one end of the first mounting portion (43); the hook (44) is arranged obliquely, with one end connected to the avoidance hole (45) and the other end extending out of the avoidance hole (45) and used to hook the fixing block (113).

3. The coil connection structure of the contactor according to claim 1, characterized in that: A stop step is provided on the side wall of the fixing hole (112), and a stop sheet (46) is provided on the first mounting portion (43). The stop step and the stop sheet (46) are in abutment with each other in the insertion direction of the first mounting portion (43).

4. The coil connection structure of the contactor according to claim 3, characterized in that: The side edge of the first mounting portion (43) is bent to form the stop sheet (46); a relief position for avoiding the stop sheet (46) and connected to the fixing hole (112) is provided on the side wall of the fixing hole (112); and the stop step is formed at the relief position on the side wall of the fixing hole (112).

5. The coil connection structure of the contactor according to claim 1, characterized in that: The first mounting portion (43) and the first wiring portion (41) are arranged side by side, one end side edge of the first wiring portion (41) extends to connect with the side edge of the first mounting portion (43) and is placed in the avoidance gap (114) of the fixing block (113), and the other end of the first wiring portion (41) is an I-shaped structure for winding.

6. The coil connection structure of the contactor according to claim 1, characterized in that: The first connecting portion (42) is a barbed hook structure extending out of the first mounting cavity (111) and having a hook portion (421); a side of the first connecting portion (42) facing away from the hook portion (421) is a contact surface (422).

7. The coil connection structure of the contactor according to claim 1, characterized in that: The bracket (11) further comprises a second spring piece (5), wherein the second spring piece (5) comprises a second wiring portion (51), a second connecting portion (52) and a second mounting portion (53), wherein a clamping hole (531) is provided on the second mounting portion (53), and the bracket (11) is provided with a second mounting cavity (115) for mounting the second spring piece (5), wherein a convex bump (116) is provided in the second mounting cavity (115) and is clamped with the clamping hole (531), and wherein the protruding direction of the convex bump (116) is perpendicular to the mounting direction of the second spring piece (5).

8. The coil connection structure of the contactor according to claim 7, characterized in that: A support platform (117) connected between two side walls of the second installation cavity (115) is provided in the second installation cavity (115); a limit platform (118) spaced apart from the side walls of the second installation cavity (115) is provided on the support platform (117); the second installation portion (53) is a U-shaped structure; the second installation portion (53) is placed on the support platform (117), and two sides of the second installation portion are respectively inserted into the gap between the limit platform (118) and the two side walls of the second installation cavity (115).

9. The coil connection structure of the contactor according to claim 7, characterized in that: The second wiring portion (51), the second mounting portion (53) and the second connecting portion (52) are arranged in a row; the second mounting portion (53) is connected between the second wiring portion (51) and the second connecting portion (52); and the end of the second wiring portion (51) is an I-shaped structure for winding.

10. The coil connection structure of the contactor according to claim 7, characterized in that: The second connecting portion (52) comprises two clamping pieces (521) which are symmetrically and spaced apart from each other, wherein the middle parts of the two clamping pieces (521) are relatively close to each other and the two ends are relatively far apart from each other.

11. The coil connection structure of the contactor according to claim 1, characterized in that: The coil skeleton (1) comprises a skeleton body (12) and two skeleton flanges (13) arranged at the upper and lower ends of the skeleton body (12); the skeleton body (12) is a circular columnar structure with an axial hole; the skeleton flange (13) is a disc-shaped structure with a high middle and low surroundings; and the bracket (11) is arranged on the skeleton flange (13) at the upper end of the skeleton body (12).

12. A contactor, characterized in that: It comprises the coil connection structure as described in any one of claims 1-11.

13. The contactor according to claim 12, characterized in that: The invention comprises a starting coil (2), a holding coil (3), a lead wire and two auxiliary spring sheets, wherein the starting coil (2) is sleeved on a coil frame (1), and the holding coil (3) is sleeved on the starting coil (2); the coil connection structure comprises two first spring sheets (4) and a second spring sheet (5), wherein the two first spring sheets (4) are symmetrically arranged on both sides of the second spring sheet (5), a first connection portion (41) of a first spring sheet (4) is connected to one end of the starting coil (2), and a first connection portion (42) thereof is connected to an auxiliary spring sheet, a first connection portion (41) of another first spring sheet (4) is connected to one end of the holding coil (3), and a first connection portion (42) thereof is connected to another auxiliary spring sheet, a second connection portion (51) of the second spring sheet (5) is connected to the other end of the starting coil (2) and the other end of the holding coil (3), and a second connection portion (52) thereof is connected to the lead wire.

Images