Coil assembly and contactor

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a coil assembly and a contactor, the coil assembly comprises a coil framework, a lead and a first lug plate, the coil framework comprises a winding reel and a first end plate arranged at the end part of the winding reel, the first end plate is provided with a first slot, and the first slot is provided with a notch facing the middle part of the first end plate; the wire is wound on the winding reel; the first lug plate is conductively connected with the wire, the first lug plate is inserted into the first slot through the notch and is in close fit with the side wall of the first slot, and the bottom wall of the first slot stops the first lug plate in the inserting direction of the first lug plate. Due to the stopping effect of the bottom wall of the first slot and the friction force effect of the side wall of the first slot on the first lug plate, the first lug plate can be effectively prevented from being separated from the first slot during winding, the installation stability of the first lug plate is ensured, the production process of the coil assembly is prevented from being interrupted, reworking is reduced, and the production speed is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a coil component and a contactor. Background Art

[0002] The coil assembly in the contactor is used to generate a magnetic field when power is turned on to magnetically attract the armature. When the contactor is closed, the armature drives the contact support, and the contact support drives the moving contact to complete the contact between the moving contact and the static contact. When the contactor is disconnected, the contact spring pushes the contact within the overtravel range, and the reaction spring pushes the armature or the contact support to complete the separation of the moving contact and the static contact, thereby realizing the on and off of the control circuit.

[0003] The coil assembly usually includes a coil frame, a wire and a terminal block. The wire is wound on the coil frame to form a coil. The coil frame is provided with two mounting slots for mounting the terminal blocks. The two terminal blocks are inserted into the two mounting slots one by one. The two terminal blocks are respectively conductively connected to the two ends of the coil and are used to connect external leads to connect the coil to the circuit.

[0004] The prior art has the following defects: when the drive coil frame rotates around its axis to wind the wire, the terminal piece may come out of the notch of the mounting slot due to the centrifugal force, causing the wire connected to the terminal piece to be pulled out, interrupting the production process of the coil assembly and causing a lot of rework.

[0005] Therefore, there is an urgent need for a coil assembly and a contactor to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a coil assembly and a contactor to solve the problem that the terminal piece is easily disengaged from the installation groove when the coil frame is rotated to wind the wire, avoid interrupting the production process of the coil assembly, reduce rework, and speed up production.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] In a first aspect, a coil assembly is provided, comprising:

[0009] A coil frame, comprising a bobbin and a first end plate arranged at the end of the bobbin, wherein the first end plate is provided with a first slot, and the first slot has a notch facing the middle of the first end plate;

[0010] A conductor, wound on the winding drum;

[0011] The first wiring piece is conductively connected to the wire, the first wiring piece is inserted into the first slot through the notch, and is tightly matched with the side wall of the first slot, and the bottom wall of the first slot stops the first wiring piece in the insertion direction of the first wiring piece.

[0012] As a preferred solution of the coil assembly provided by the utility model, a limiting hole is provided through the bottom wall of the first slot, and at least one limiting protrusion is protruded from the first wiring piece, and the limiting protrusion is inserted into the limiting hole.

[0013] As a preferred solution of the coil assembly provided by the utility model, at least one of the limiting protrusions is provided with a first winding portion for conductively connecting the end of the wire, and the first winding portion extends out of the first slot through the limiting hole;

[0014] The first end plate is provided with a wire routing groove, the wire routing groove is located between the first winding portion and the winding drum, and the bottom wall of the wire routing groove is connected to the outer wall of the winding drum.

[0015] As a preferred solution of the coil assembly provided by the utility model, a stop buckle is protruding from the inner wall of the slot, and the first wiring piece is clamped between the bottom wall of the first slot and the stop buckle.

[0016] As a preferred solution of the coil assembly provided by the utility model, the first slot extends from one end to the other end of the first end plate, at least one end of the first connecting piece along the extension direction of the first slot extends out of the first slot, and is provided with a connecting hole for connecting a lead wire;

[0017] The stop buckle extends from one end of the first slot to the other end, and the portion of the first wiring piece extending out of the first slot is provided with a bending section, and the bending section is bent toward the middle of the first end plate so that the connecting hole can be opposite to the portion on the contactor housing for fixing the first wiring piece.

[0018] As a preferred solution of the coil assembly provided by the utility model, the side wall of the first slot is recessed relative to the middle of the first end plate, a first slope is connected between the middle surface of the first end plate and the side wall of the first slot, and the first wiring piece enters the slot along the first slope.

[0019] As a preferred solution of the coil assembly provided by the utility model, the coil assembly further comprises a second connecting piece conductively connected to the wire;

[0020] A second end plate is provided at one end of the winding drum away from the first end plate, a baffle structure is provided on the second end plate, a second slot is formed between the baffle structure and the second end plate, and the second wiring piece is inserted into the second slot along an M direction, and the M direction points from the middle of the second end plate to the outside;

[0021] A limiting flange is provided at one end of the second connecting piece along the M direction, and a second winding portion for conductively connecting the end of the wire is provided at the other end, the limiting flange abuts against the baffle structure, and the second winding portion extends out of the second slot;

[0022] The slot wall of the second slot can limit the second connecting piece in the N direction, and the N direction is perpendicular to the M direction.

[0023] As a preferred solution of the coil assembly provided by the utility model, a mounting groove is recessed on the surface of the second end plate, the baffle structure at least partially extends to cover the slot opening of the mounting groove, and the slot wall of the mounting groove and the side of the baffle structure facing the mounting groove jointly enclose the second slot.

[0024] As a preferred solution of the coil assembly provided by the utility model, the bottom wall of the installation groove is provided with one or more tightening ribs spaced apart along the N direction, and the opposite sides of the second wiring piece are respectively pressed against the tightening rib and the baffle structure.

[0025] As a preferred solution of the coil assembly provided by the utility model, a second slope is connected between the surface of the second end plate and the bottom wall of the mounting groove, and the second connecting piece is inserted into the second slot along the second slope.

[0026] As a preferred solution of the coil assembly provided by the utility model, the second end plate is provided with an escape groove directly facing the second winding part, and the escape groove is used to escape the wire wound on the second winding part.

[0027] As a preferred solution of the coil assembly provided by the utility model, two coil skeletons are arranged side by side, and two first connecting pieces are arranged;

[0028] A first slot is respectively provided at both ends of each first end plate, the first slots on the two coil skeletons are aligned one by one along the arrangement direction of the coil skeletons, and the first wiring piece is inserted into the two aligned first slots;

[0029] A second connecting piece is disposed on the second end plates of the two coil skeletons;

[0030] The two first connecting pieces, the two second connecting pieces and the conducting wires on the two coil skeletons are connected in series.

[0031] In a second aspect, a contactor is provided, comprising a housing, wherein the coil assembly as described above is installed in the housing.

[0032] Beneficial effects of the utility model:

[0033] The utility model provides a coil assembly and a contactor including the coil assembly, wherein a first wiring piece is used to connect a wire wound on a winding drum and an external lead wire, so as to connect a coil formed by winding the wire into a corresponding loop. A first slot for installing the first wiring piece has a notch facing the middle of a first end plate, and when installing, the first wiring piece is inserted into the first slot from the notch, and the insertion direction thereof is from the middle of the first end plate to the outside, and after insertion, the bottom wall of the first slot can stop the first wiring piece in the insertion direction of the first wiring piece, and the first wiring piece and the side wall of the first slot are tightly matched, and when the coil skeleton rotates around its center to wind the wire, due to the stopping effect of the bottom wall of the first slot and the friction effect of the side wall of the first slot on the first wiring piece, the first wiring piece can be effectively prevented from escaping from the first slot to the outside under the action of centrifugal force and the first wiring piece can be shaken, and in addition, the tight fit between the side wall of the first slot and the first wiring piece can also prevent the first wiring piece from escaping from the notch, thereby ensuring the installation stability of the first wiring piece, avoiding interruption of the manufacturing process of the coil assembly, reducing rework, and speeding up production speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a first view of a single coil structure provided by a specific embodiment of the utility model;

[0035] Figure 2 This is a second view of the single coil structure provided by the specific embodiment of the utility model (one of the first wiring pieces is hidden);

[0036] Figure 3 It is a structural schematic diagram of a first wiring piece provided in a specific embodiment of the utility model;

[0037] Figure 4 It is a partial view of the first end plate provided in a specific embodiment of the utility model;

[0038] Figure 5 It is a third view of the single coil structure provided by the specific embodiment of the utility model;

[0039] Figure 6 yes Figure 1 A partial enlarged view of point C in the middle;

[0040] Figure 7 This is a first view of the double coil structure provided by the specific embodiment of the utility model;

[0041] Figure 8 This is a second view of the double coil structure provided by the specific embodiment of the utility model;

[0042] Fig. 9 It is a structural schematic diagram of a second wiring piece provided in a specific embodiment of the utility model;

[0043] Fig.10 It is a schematic diagram of a coil skeleton in a double coil structure provided in a specific embodiment of the utility model;

[0044] Fig.11 yes Figure 7 A first partial view of

[0045] Fig.12 yes Figure 7 A second partial view of

[0046] Fig.13 It is a schematic diagram of the assembly of two coil skeletons in a double coil structure provided in a specific embodiment of the utility model.

[0047] In the figure:

[0048] 1. Coil skeleton; 2. First connecting piece; 3. Second connecting piece;

[0049] 11. bobbin; 12. first end plate; 13. second end plate;

[0050] 121, first slot; 122, limiting hole; 123, wiring groove; 124, middle surface; 125, first slope; 126, limiting plate;

[0051] 1211, stop buckle;

[0052] 130, second slot; 131, baffle structure; 132, mounting slot; 133, tight reinforcement; 134, second slope; 135, avoidance slot; 136, stiffening plate; 137, first insert; 138, first splicing slot; 139, second insert; 1310, second splicing slot;

[0053] 1371, card head; 1381, card hole;

[0054] 21. Position limiting protrusion; 22. First winding portion; 23. Turning section; 24. Connecting section;

[0055] 241, connection hole;

[0056] 31. Limiting flange; 32. Second winding part. DETAILED DESCRIPTION

[0057] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0058] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0060] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0061] like Figure 1 As shown, this embodiment provides a coil assembly, including a coil frame 1, a wire (not shown) and a first connecting piece 2. The wire is wound on the coil frame 1 to form a coil. The first connecting piece 2 is installed on the coil frame 1. The first connecting piece 2 is used to connect the wire wound on the coil frame 1 and the external lead wire to connect the coil formed by the wire winding into the corresponding loop. The coil assembly can solve the problem that the first connecting piece 2 is easy to fall out when the coil frame 1 rotates to wind the wire, avoid interrupting the production process of the coil assembly, reduce rework, and speed up production.

[0062] Specifically, see Figure 1 and Figure 2The coil frame 1 includes a bobbin 11 and a first end plate 12 and a second end plate 13 respectively arranged at the ends of the bobbin 11. The bobbin 11, the first end plate 12 and the second end plate 13 roughly form an I-shape. The wire is wound on the bobbin 11 to form a coil, and the formed coil is located between the first end plate 12 and the second end plate 13. The first end plate 12 is provided with a first slot 121, and the first slot 121 has a notch facing the middle of the first end plate 12; the first terminal piece 2 is conductively connected to the wire, and the first terminal piece 2 is inserted into the first slot 121 through the notch and tightly matched with the side wall of the first slot 121, and the bottom wall of the first slot 121 stops the first terminal piece 2 in the insertion direction of the first terminal piece 2.

[0063] The conducting wire in this embodiment specifically refers to an enameled wire commonly used in winding coils.

[0064] The first slot 121 for installing the first terminal block 2 has a notch facing the middle of the first end plate 12. During installation, the first terminal block 2 is inserted into the first slot 121 from the notch, and the insertion direction is from the middle of the first end plate 12 to the outside. After insertion, the bottom wall of the first slot 121 can stop the first terminal block 2 in the insertion direction of the first terminal block 2. Moreover, the first terminal block 2 and the side walls of the first slot 121 are tightly matched. When the coil skeleton 1 rotates around its center to wind the wire, due to the stopping effect of the bottom wall of the first slot 121 and the friction force of the side walls of the first slot 121 on the first terminal block 2, the first terminal block 2 can be effectively prevented from escaping from the first slot 121 to the outside under the action of centrifugal force and the first terminal block 2 can be prevented from shaking. In addition, the tight fit between the side walls of the first slot 121 and the first terminal block 2 can also prevent the first terminal block 2 from escaping from the notch, thereby ensuring the installation stability of the first terminal block 2, avoiding interruption of the manufacturing process of the coil assembly, reducing rework, and speeding up production.

[0065] In this embodiment, the first wiring piece 2 and the side wall of the first slot 121 are interference fit. During installation, the first wiring piece 2 is squeezed into the first slot 121 so that the first wiring piece 2 can be tightly inserted into the first slot 121, which can prevent the first wiring piece 2 from falling out from the inner side of the notch of the first slot 121.

[0066] For the convenience of description, the insertion direction of the first terminal piece 2 is defined as direction A, and is directed from the middle of the first end plate 12 to the outside. When the first terminal piece 2 is inserted into the first slot 121, its width direction is parallel to direction A, and its length direction is direction B, and the first slot 121 extends along direction B. The first end plate 12 is a rectangular plate, and directions A and B are respectively parallel to its two adjacent sides.

[0067] See also Figure 2 and Figure 3, the first slot 121 has openings at both ends along the B direction. To prevent the first wiring piece 2 from falling out of the opening, a limiting hole 122 is provided through the bottom wall of the first slot 121. At least one limiting protrusion 21 is provided on the first wiring piece 2. The limiting protrusion 21 is inserted into the limiting hole 122 along the A direction to limit the movement of the first wiring piece 2 along its length direction (i.e., the B direction), thereby further improving the stability of the first wiring piece 2. Specifically, in this embodiment, two limiting holes 122 are provided at intervals along the B direction on the bottom wall of the first slot 121. Two limiting protrusions 21 are provided on the first wiring piece 2. The two limiting protrusions 21 are inserted into the two limiting holes 122 one by one along the A direction, thereby further preventing the first wiring piece 2 from moving along the B direction. In other embodiments, the number of limiting holes 122 and limiting protrusions 21 can be adaptively increased or decreased, which is not specifically limited here.

[0068] Further, see Figure 2 and Figure 3 , a first winding portion 22 is provided on one of the limiting protrusions 21, and the first winding portion 22 extends out of the first slot 121 through the limiting hole 122, and is used to wind the end of the wire to achieve a conductive connection between the wire and the first wiring piece 2. The first winding portion 22 specifically includes a first winding rod, and corresponding protrusions are protruded on both opposite sides of the first winding rod. When winding the wire, it is easier to fix the position of the wire and prevent the wire from sliding along the first winding rod after winding. Figure 4 and Figure 5 The first end plate 12 is provided with a wire groove 123, which is located between the first winding portion 22 and the bobbin 11, and the bottom wall of the wire groove 123 is connected to the outer wall of the bobbin 11. The end of the wire enters the wire groove 123 after being wound on the first winding portion 22, and is wound on the bobbin 11 after passing through the wire groove 123. The bottom wall of the wire groove 123 is an arc-shaped wall, which is connected to the outer wall of the bobbin 11, so that the wire is smoothly wound on the bobbin 11 under the guidance of the bottom wall of the wire groove 123.

[0069] In other embodiments, the first winding portion 22 may be provided on a plurality of limiting protrusions 21 , and when connecting the wire, one of the first winding portions 22 at a suitable position may be selected for winding.

[0070] like Figure 2 and Figure 4 As shown, a stop buckle 1211 is protruding from the inner wall of the slot, and the first wiring piece 2 is clamped between the bottom wall of the first slot 121 and the stop buckle 1211 to prevent the first wiring piece 2 from slipping out of the slot of the first slot 121. That is, in the A direction, the bottom wall of the first slot 121 and the stop buckle 1211 stop the first wiring piece 2 on both sides of the first wiring piece 2 respectively.

[0071] Specifically, in this embodiment, both ends of the first end plate 12 along the A direction are provided with a limit plate 126, the limit plate 126 is folded upward from the edge of the first end plate 12 to define the first slot 121 together with the first end plate 12, and the stop buckle 1211 is provided at one end of the limit plate 126 along the A direction. Moreover, the limit plate 126 has a certain elastic deformation ability, so that the first wiring piece 2 can be smoothly inserted into the first slot 121.

[0072] In this embodiment, refer to Figure 1 and Figure 2 , the two limiting plates 126 extend from one end of the first end plate 12 to the other end along the B direction, and correspondingly, the first slot 121 defined by the limiting plates 126 also extends from one end of the first end plate 12 to the other end, so as to ensure that the inner wall of the first slot 121 is in full contact with the first wiring piece 2, thereby ensuring the installation stability of the first wiring piece 2. At least one end of the first wiring piece 2 along the extension direction of the first slot 121 (i.e., the B direction) extends out of the first slot 121 to connect an external lead wire, thereby connecting the coil to the corresponding loop.

[0073] See also Figure 2 The stop buckle 1211 extends from one end of the first slot 121 to the other end, see Figure 1 , Figure 3 as well as Figure 6 The portion of the first connecting piece 2 extending out of the first slot 121 is provided with a turning section 23, which is bent toward the middle of the first end plate 12, and is L-shaped, one end of which is connected to the portion inserted into the first slot 121 and is arranged at an angle, and the other end is connected to a connecting section 24 in the shape of a rectangular sheet, and a connecting hole 241 for connecting a lead is provided on the connecting section 24. The connecting hole 241 can be a threaded hole, and a screw can be used to fix the lead and the connecting section 24 to achieve conductive connection between the lead and the first connecting piece 2. The distance between the two first terminal lugs 2 on the first end plate 12 is relatively far, while the parts on the contactor housing for mounting the two first terminal lugs 2 (defined as the terminal lug mounting parts) are relatively close in spacing. Therefore, a turning section 23 is provided to adjust the positions of the two connecting sections 24 so that the two connecting sections 24 are closer to each other, thereby adjusting the spacing between the two connecting sections 24 to be consistent with the spacing between the two terminal lug mounting parts on the housing, so that the connecting hole 241 is aligned with the terminal lug mounting part, thereby realizing the fixation of the first terminal lug 2 to the lead on the contactor housing.

[0074] like Figure 2 and Figure 4As shown, the side wall of the first slot 121 is recessed relative to the middle surface 124 of the first end plate 12, and the stop plate 126 is flush with the middle surface 124 of the first end plate 12, so that the entire first end plate 12 is relatively flat. A first slope 125 is connected between the middle surface 124 of the first end plate 12 and the side wall of the first slot 121. The first slope 125 is set at an obtuse angle to the middle surface 124 and the side wall of the first slot 121, so that the transition between the middle surface 124 and the side wall of the first slot 121 is smoother, and the first wiring piece 2 can enter the notch along the first slope 125. The first slope 125 guides the insertion of the first wiring piece 2, facilitating the installation operation of the first wiring piece 2.

[0075] Reference Figures 1 to 6 , the coil assembly shown is a single coil structure, which only includes a coil frame 1, and the coil frame 1 is provided with two first slots 121, and each first slot 121 is inserted with a first wiring piece 2. For example, referring to Figure 1 and Figure 5 When winding the wire, the end of the wire is firstly wound on the first winding part 22 of the first connecting piece 2 above the wiring groove 123, and then the wire is introduced into the winding drum 11 through the wiring groove 123, and the winding drum 11 is rotated to make the wire on the winding drum 11 into a coil, and the tail end of the wire is wound on the first winding part 22 of another first connecting piece 2. That is, the two first connecting pieces 2 are respectively conductively connected to the two ends of the coil, and the coil can be connected to the corresponding circuit by connecting with the external lead through the connection holes 241 of the two first connecting pieces 2.

[0076] like Figures 7 to 13 As shown, the coil assembly shown is a double-coil structure, which includes two coil skeletons 1 arranged side by side, each of which is wound with a wire to form a coil, and the two coils are connected in series.

[0077] See also Figure 7 and Figure 8 In the double coil structure, two first connecting pieces 2 are provided. A first slot 121 is provided at each end of each first end plate 12. The first slots 121 on the two coil skeletons 1 are aligned one by one along the arrangement direction of the coil skeletons 1. The first connecting piece 2 is inserted into the two aligned first slots 121 at the same time. Figure 7 In the middle position, the upper first connecting piece 2 is inserted into the two first slots 121 aligned at the upper side; the lower first connecting piece 2 is inserted into the two first slots 121 aligned at the lower side. A first winding portion 22 is provided on each of the two first connecting pieces 2, and the two first winding portions 22 pass through the limiting holes 122 on the two coil skeletons 1 respectively.

[0078] See also Figure 8The double coil structure further includes two second connecting pieces 3. A second connecting piece 3 is disposed on each of the second end plates 13 of the two coil skeletons 1. The second connecting piece 3 is used for conducting connection with the wire. The two first connecting pieces 2, the two second connecting pieces 3 and the coils on the two coil skeletons 1 are connected in series.

[0079] Specifically, the two ends of the coil are respectively connected to the corresponding second terminal blocks 3 and one of the first terminal blocks 2, the two coils are respectively connected to the two first terminal blocks 2, the two second terminal blocks 3 are connected in series through wires, etc., one of the two first terminal blocks 2 is used to connect the lead of the input current, and the other is used to connect the lead of the output current, thereby realizing the series connection of the two coils.

[0080] See also Figure 8 , Fig.11 as well as Fig.12 The second end plate 13 is provided with a baffle structure 131, and a second slot 130 is formed between the baffle structure 131 and the second end plate 13. The second terminal piece 3 is inserted into the second slot 130 along the M direction. The M direction points from the middle of the second end plate 13 to the outer edge of the second end plate 13. Fig. 9 The second terminal piece 3 is provided with a limit flange 31 at one end along the M direction, and a second winding portion 32 at the other end. The limit flange 31 abuts against the baffle structure 131, and the second winding portion 32 extends out of the second slot 130. The second winding portion 32 is used to wind the end of the wire to achieve a conductive connection between the second terminal piece 3 and the wire. Due to the stopping effect of the limit flange 31 and the baffle structure 131, the second terminal piece 3 can be prevented from moving along the M direction.

[0081] Furthermore, the slot wall of the second slot 130 can limit the second terminal piece 3 in the N direction, and the N direction is perpendicular to the M direction. Specifically, the M direction and the N direction are respectively parallel to the two adjacent side edges of the second end plate 13, and by limiting the second terminal piece 3 in two perpendicular directions, the second terminal piece 3 can be effectively prevented from moving on the second end plate 13. In this embodiment, the upper and lower surfaces of the second terminal piece 3 are tightly matched with the slot wall of the second slot 130, so that the second slot 130 defined by the baffle structure 131 and the second end plate 13 can limit the movement of the second terminal piece 3 in the thickness direction of the second terminal piece 3.

[0082] Similar to the first winding portion 22, the second winding portion 32 includes a second winding rod and protrusions disposed on opposite sides of the second winding rod, which effectively prevent the wire from sliding along the second winding rod after being wound.

[0083] See also Fig.10 and Fig.12The surface of the second end plate 13 is concavely provided with a mounting groove 132, and the baffle structure 131 at least partially extends to the notch of the mounting groove 132, and the groove wall of the mounting groove 132 and the side of the baffle structure 131 facing the mounting groove 132 jointly enclose the second slot 130. The second terminal piece 3 is clamped in the mounting groove 132, so that the second terminal piece 3 is installed more firmly. Furthermore, the bottom wall of the mounting groove 132 is provided with one or a plurality of tight ribs 133 spaced along the N direction, and the opposite sides of the second terminal piece 3 (i.e., the two sides along the thickness direction) are respectively pressed against the tight ribs 133 and the baffle structure 131, so that the second terminal piece 3 is tightly fitted in the second slot 130, effectively preventing the second terminal piece 3 from falling out. In this embodiment, two tight ribs 133 are provided. When the second terminal piece 3 is inserted, the second winding portion 32 extends out of the second slot 130 through the gap between the two tight ribs 133.

[0084] See also Fig.11 and Fig.12 There are two baffle structures 131 arranged at intervals, one of which is L-shaped, with one end connected to the second end plate 13 and the other end bent to the top of the mounting groove 132; the other baffle structure 131 is flat, and a stiffening plate 136 is arranged on the side facing away from the L-shaped baffle structure 131. The stiffening plate 136 is connected to the second end plate 13 to increase the connection strength between the baffle structure 131 and the second end plate 13.

[0085] See also Fig.10 and Fig.12 A second slope 134 is connected between the surface of the second end plate 13 and the bottom wall of the installation groove 132. The second slope 134 is arranged at an obtuse angle to the surface of the second end plate 13 and the bottom wall of the installation groove 132. The second connecting piece 3 is inserted into the second slot 130 along the second slope 134. The second slope 134 can guide the insertion of the second connecting piece 3, making the installation process smoother and more convenient.

[0086] See also Fig.10 and Fig.12 The second end plate 13 is provided with an avoidance groove 135 at a position directly opposite to the second winding portion 32. The avoidance groove 135 is used to avoid the wire wound on the second winding portion 32. After the wire forms a coil on the winding drum 11, its tail end passes through the avoidance groove 135 from the position of the winding drum 11 and is wound on the second winding portion 32. The setting of the avoidance groove 135 can prevent the wire wound on the second winding portion 32 from interfering with the second end plate 13.

[0087] See also Fig.13In order to realize the splicing of two coil skeletons 1, first inserting pieces 137 and first splicing grooves 138 are arranged at intervals on the first end plate 12. A clamping head 1371 is arranged at one end of the first inserting piece 137 away from the first end plate 12. The first splicing groove 138 is recessed in the side wall of the first end plate 12, and a clamping hole 1381 is arranged at one end away from the side wall. The clamping hole 1381 passes through the surface of the first end plate 12. The first inserting pieces 137 of the two coil skeletons 1 are inserted into each other's first splicing grooves 138, and the clamping head 1371 on the first inserting piece 137 is clamped into each other's clamping hole 1381, so as to realize the splicing of the two first end plates 12.

[0088] Furthermore, second inserting pieces 139 and second splicing grooves 1310 are arranged at intervals on the second end plate 13 , and the second inserting pieces 139 of the two coil skeletons 1 are inserted into each other's second splicing grooves 1310 to achieve splicing of the two second end plates 13 .

[0089] The following reference Figure 7 An exemplary brief description of the winding sequence of the double coil structure:

[0090] Figure 7 The wire on the coil frame 1 on the left side is wound at its head end on the first winding portion 22 extending from the coil frame 1 (i.e., the first winding portion 22 on the lower first wiring piece 2), and then guided to the winding drum 11 through the wiring groove 123 for winding. After the winding is completed, the tail end is wound on the second winding portion 32 extending from the coil frame 1. Figure 7 The lead end of the wire on the coil frame 1 on the middle right side is wound around the first winding portion 22 extending from the coil frame 1 (i.e., the first winding portion 22 on the upper first connecting piece 2), and the tail end is wound around the second winding portion 32 extending from the coil frame 1.

[0091] The two second winding parts 32 are conductively connected via wires, and the two first terminal pieces 2 are respectively connected to a lead through the connecting holes 241 thereon. For example, the current enters through the left end of the lower first terminal piece 2, and flows through the left first winding part 22, the left coil, the left second winding part 32, the right second winding part 32, the right coil, the right first winding part 22, and finally flows out through the right end of the upper first terminal piece 2.

[0092] This embodiment also provides a contactor, including a housing, in which a contact support, a moving contact, a stationary contact, and the coil assembly as described above are installed. The moving contact is arranged on the contact support, and an armature is arranged on the contact support. When the coil assembly is energized, a magnetic field is generated to magnetically attract the armature, so that the armature drives the moving contact to move through the contact support, thereby completing the contact or separation action between the moving contact and the stationary contact. The advantages of the contactor with the coil assembly are as described above, and will not be elaborated here.

[0093] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A coil assembly, characterized in that include: A coil frame (1) comprises a bobbin (11) and a first end plate (12) arranged at the end of the bobbin (11), wherein the first end plate (12) is provided with a first slot (121), and the first slot (121) has a notch facing the middle of the first end plate (12); A conducting wire, wound on the winding drum (11); A first wiring piece (2) is conductively connected to the conductive wire; the first wiring piece (2) is inserted into the first slot (121) through the notch and is tightly fitted with the side wall of the first slot (121); the bottom wall of the first slot (121) stops the first wiring piece (2) in the insertion direction of the first wiring piece (2).

2. The coil assembly according to claim 1, characterized in that: A limiting hole (122) is provided through the bottom wall of the first slot (121), and at least one limiting protrusion (21) is provided on the first wiring sheet (2), and the limiting protrusion (21) is inserted into the limiting hole (122).

3. The coil assembly according to claim 2, characterized in that: A first winding portion (22) for conductively connecting the end of the wire is provided on at least one of the limiting protrusions (21), and the first winding portion (22) extends out of the first slot (121) through the limiting hole (122); The first end plate (12) is provided with a wiring groove (123), the wiring groove (123) is located between the first winding portion (22) and the winding drum (11), and the bottom wall of the wiring groove (123) is connected to the outer wall of the winding drum (11).

4. The coil assembly according to claim 1, characterized in that: A stop buckle (1211) is protrudingly provided on the inner wall of the slot, and the first wiring piece (2) is clamped between the bottom wall of the first slot (121) and the stop buckle (1211).

5. The coil assembly according to claim 4, characterized in that: The first slot (121) extends from one end of the first end plate (12) to the other end, and at least one end of the first connecting piece (2) along the extension direction of the first slot (121) extends out of the first slot (121), and is provided with a connecting hole (241) for connecting a lead wire; The stop buckle (1211) extends from one end of the first slot (121) to the other end, and the portion of the first wiring piece (2) extending out of the first slot (121) is provided with a bending section (23), and the bending section (23) is bent toward the middle of the first end plate (12) so that the connecting hole (241) can be opposite to a portion on the contactor housing for fixing the first wiring piece (2).

6. The coil assembly according to claim 1, characterized in that: The side wall of the first slot (121) is recessed relative to the middle of the first end plate (12); a first slope (125) is connected between the middle surface (124) of the first end plate (12) and the side wall of the first slot (121); and the first wiring piece (2) enters the slot along the first slope (125).

7. The coil assembly according to any one of claims 1 to 6, characterized in that: The coil assembly also includes a second terminal block (3) conductively connected to the wire; A second end plate (13) is provided at one end of the winding drum (11) away from the first end plate (12); a baffle structure (131) is provided on the second end plate (13); a second slot (130) is formed between the baffle structure (131) and the second end plate (13); the second wiring sheet (3) is inserted into the second slot (130) along an M direction, and the M direction points from the middle of the second end plate (13) to the outside; The second connecting piece (3) is provided with a limiting flange (31) at one end along the M direction, and a second winding portion (32) for conductively connecting the end of the wire is provided at the other end, the limiting flange (31) abuts against the baffle structure (131), and the second winding portion (32) extends out of the second slot (130); The slot wall of the second slot (130) can limit the second connecting piece (3) in the N direction, and the N direction is perpendicular to the M direction.

8. The coil assembly according to claim 7, characterized in that: A mounting groove (132) is recessed on the surface of the second end plate (13); the baffle structure (131) at least partially extends to cover the groove opening of the mounting groove (132); and the groove wall of the mounting groove (132) and a side of the baffle structure (131) facing the mounting groove (132) jointly enclose the second slot (130).

9. The coil assembly according to claim 8, characterized in that: The bottom wall of the installation groove (132) is provided with one or a plurality of tightening ribs (133) spaced apart along the N direction, and opposite sides of the second connecting piece (3) are respectively pressed against the tightening ribs (133) and the baffle structure (131).

10. The coil assembly according to claim 8, characterized in that A second slope (134) is connected between the surface of the second end plate (13) and the bottom wall of the mounting groove (132), and the second connecting piece (3) is inserted into the second slot (130) along the second slope (134).

11. The coil assembly according to claim 7, characterized in that: The second end plate (13) is provided with an escape groove (135) directly opposite to the second winding portion (32), and the escape groove (135) is used to escape the wire wound on the second winding portion (32).

12. The coil assembly according to claim 7, characterized in that: Two coil skeletons (1) are arranged side by side, and two first connecting pieces (2) are arranged; A first slot (121) is respectively provided at both ends of each first end plate (12); the first slots (121) on the two coil skeletons (1) are aligned one by one along the arrangement direction of the coil skeletons (1); and the first connecting piece (2) is inserted into the two aligned first slots (121); A second connecting piece (3) is disposed on each of the second end plates (13) of the two coil skeletons (1); The two first connecting pieces (2), the two second connecting pieces (3) and the conducting wires on the two coil skeletons (1) are connected in series.

13. A contactor, characterized in that It comprises a shell, in which the coil assembly according to any one of claims 1 to 12 is installed.

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