Assembly structure of coil and circuit board assembly and contactor

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses an assembling structure of a coil and a circuit board assembly and a contactor. The assembly structure of the coil and the circuit board assembly comprises an assembly main body and an upper cover, and a coil installation cavity used for installing the coil framework and a circuit board installation cavity used for installing the circuit board assembly are arranged on the assembly main body in parallel in the length direction of the assembly main body. The coil installation cavity and the circuit board installation cavity enable the axis of the coil framework to be parallel to the center line of the circuit board assembly, and a spring bolt is further arranged on the assembly body. And the upper cover covers the opening of the circuit board mounting cavity, and a lock catch is arranged on the upper cover and is used for being clamped with the spring bolt. According to the assembly structure of the coil and the circuit board assembly, the coil and the circuit board assembly are integrated together, the installation difficulty between the coil and the circuit board assembly is reduced, the longitudinal size is small, and the assembly structure is suitable for the situation that the space in a contactor shell is small.

Description

Technical Field

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

[0002] A contactor is an electrical component that controls the on and off of a circuit. It generally includes a housing and an electromagnetic system, a contact system, and an arc extinguishing device installed in the housing. The electromagnetic system includes an electromagnetic coil and an iron core, and is an important component of the contactor, which drives the closing and opening of the contacts.

[0003] At present, in order to solve the technical problems of complex process and high coil scrap rate caused by direct packaging of coils and coil circuit boards, a coil frame has been designed. The coil can be detachably installed in the coil frame, and the coil circuit board is installed in a universal module box. The coil frame is connected to the universal module box, and then the wires in the coil installed in the coil frame are introduced into the coil circuit board in the universal module box. However, the coil circuit board is installed vertically in the universal module box, that is, the axis of the coil is perpendicular to the center line of the coil circuit board, resulting in a large longitudinal dimension, which is not suitable for the case where the space in the contactor housing is small. In addition, the installation of the coil and the coil circuit board is relatively complicated.

[0004] Therefore, it is urgent to provide an assembly structure of a coil and a circuit board assembly and a contactor to solve the above problems. Utility Model Content

[0005] According to one aspect of the utility model, the utility model provides an assembly structure of a coil and a circuit board assembly, which integrates the coil and the circuit board assembly together, reduces the difficulty of installation between the coil and the circuit board assembly, and has a smaller longitudinal dimension, which is suitable for situations where the space in the contactor housing is smaller.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The assembly structure of the coil and the circuit board assembly, wherein the coil is wound on the coil frame, and the assembly structure of the coil and the circuit board assembly comprises:

[0008] An assembly body, wherein a coil installation cavity for installing the coil skeleton and a circuit board installation cavity for installing the circuit board assembly are arranged in parallel on the assembly body along the length direction of the assembly body, wherein the coil installation cavity and the circuit board installation cavity make the axis of the coil skeleton parallel to the center line of the circuit board assembly, and a locking tongue is also arranged on the assembly body;

[0009] An upper cover is arranged at the opening of the circuit board installation cavity. A lock buckle is arranged on the inner wall of the upper cover, and the lock buckle is used for engaging with the lock tongue.

[0010] Optionally, the lock buckle includes a buckle hole and an inclined guide surface arranged on one side of the buckle hole close to the lock tongue, the inclined guide surface is inclined toward the buckle hole along the installation direction of the upper cover, and the lock tongue is inserted into the buckle hole through the guidance of the inclined guide surface.

[0011] Optionally, the two opposite side walls of the circuit board installation cavity are respectively provided with limiting guide grooves extending along the installation direction of the upper cover, one end of the limiting guide groove is open, and the other end is provided with a limiting surface, and the opposite two ends of the upper cover are inserted into the corresponding limiting guide grooves through the opening and abut against the corresponding limiting surfaces.

[0012] Optionally, a first limiting boss is extended from the bottom wall of the circuit board installation cavity along the axial direction of the circuit board installation cavity, a second limiting boss is extended from the inner wall of the upper cover, a notch is formed between the second limiting boss and the inner wall of the upper cover, and the first limiting boss is inserted into the notch; or,

[0013] A first connecting column extends from the bottom wall of the circuit board installation cavity along the axial direction of the circuit board installation cavity, and a second connecting column extends from the inner wall of the upper cover; a first connecting hole is provided on the first connecting column, and a second connecting hole is provided on the second connecting column. A first connecting member is connected to the first connecting hole and the second connecting hole through the outer bottom wall of the circuit board installation cavity.

[0014] Optionally, a first card slot is provided on the assembly body, and a first buckle is provided on the inner wall of the upper cover, and the first buckle is used to engage with the first card slot; and / or,

[0015] A first avoidance notch is provided on the side wall of the assembly body close to the circuit board installation cavity, and a limiting rib is provided on one side of the upper cover. The limiting rib is placed in the first avoidance notch, and the limiting rib abuts against the wall surface of the first avoidance notch close to the circuit board installation cavity.

[0016] Optionally, the circuit board assembly includes a main circuit board and a switch assembly, and the circuit board installation cavity includes a main circuit board installation cavity for installing the main circuit board and a switch assembly installation cavity for installing the switch assembly; a second avoidance gap is provided on the upper cover, and the second avoidance gap is arranged opposite to the switch assembly.

[0017] Optionally, the switch assembly includes a switch circuit board and a switch mounted on the switch circuit board;

[0018] A clamping arm and an elastic clamping buckle are respectively provided on opposite side walls of the switch assembly installation cavity, the clamping arm is clamped to one end of the switch, and the elastic clamping buckle passes through a through hole on the switch circuit board and is clamped to the other end of the switch; or,

[0019] The switch circuit board is provided with a third connection hole, the side wall of the switch installation cavity is provided with a fourth connection hole, and the second connection member passes through the third connection hole and is connected to the fourth connection hole.

[0020] Optionally, a limit slot group and a limit flange are provided on the inner wall of the coil mounting cavity, and the limit slot group and the limit flange are arranged relatively to each other along the axial direction of the coil mounting cavity, and the limit slot group includes a second slot away from the circuit board mounting cavity and a third slot close to the circuit board mounting cavity; the opposite ends of the first board surface of the coil skeleton are respectively clamped in the second slot and the third slot, and the second buckle on the second board surface of the coil skeleton abuts against the outer wall of the limit flange.

[0021] Optionally, the assembly body is further provided with a threading groove connecting the third card slot and the circuit board installation cavity, and the lead wire of the coil enters the circuit board installation cavity through the threading groove and is electrically connected to the circuit board assembly.

[0022] Optionally, the portion of the coil skeleton that is clamped to the third clamping slot extends into the upper portion of the threading slot and abuts against the upper cover; or,

[0023] The upper cover of the threading groove is provided with a limiting plate, one side of the limiting plate abuts against the portion of the coil frame clamped in the third clamping groove, and the other side abuts against the upper cover.

[0024] According to another aspect of the utility model, the utility model also provides a contactor, including a coil, a coil frame, a circuit board assembly and an assembly structure of the coil and the circuit board assembly described in any of the above technical solutions, the coil is wound around the coil frame, the coil frame is installed in the coil installation cavity, and the circuit board assembly is installed in the circuit board installation cavity.

[0025] Optionally, a wire clamping groove is provided at an end of the coil frame close to the circuit board installation cavity, and the wire clamping groove is used to fix the lead wire of the coil.

[0026] Beneficial effects of the utility model:

[0027] The utility model provides an assembly structure of a coil and a circuit board assembly, comprising an assembly body and an upper cover. The coil is wound on a coil frame and installed in a coil installation cavity of the assembly body together with the coil frame, and the circuit board assembly is installed in the circuit board installation cavity of the assembly body, that is, the coil and the circuit board assembly can be integrated and assembled through the assembly body, and the axis of the coil frame is parallel to the center line of the circuit board assembly, which is compared with the prior art in which the axis of the coil frame is perpendicular to the center line of the circuit board assembly, and occupies less space in the longitudinal direction inside the contactor, and can be applied to the situation where the internal space of the contactor is relatively small.

[0028] By setting an upper cover to block the opening of the circuit board installation cavity, the circuit board assembly can be protected and the risk of short circuit of the circuit board assembly can be reduced. The upper cover is fixed by the clamping connection between the lock tongue and the lock buckle. While ensuring the connection strength between the upper cover and the assembly body, it is also convenient for the installation and removal of the upper cover, thereby facilitating the assembly of the coil and the circuit board assembly.

[0029] The utility model also provides a contactor, including a coil, a coil frame, a circuit board assembly and an assembly structure of the coil and the circuit board assembly. The contactor adopts the assembly structure of the coil and the circuit board assembly, so that the coil and the circuit board assembly can be integrated together, which is convenient for assembling the coil and the circuit board assembly. After assembly, the coil and the circuit board assembly occupy less space, which is conducive to improving the compactness of the contactor structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0031] Figure 1 It is an exploded schematic diagram of the coil skeleton, the circuit board assembly and the assembly structure of the coil and the circuit board assembly provided in the first embodiment of the utility model;

[0032] Figure 2 It is an assembly diagram of a coil skeleton, a circuit board assembly, and an assembly structure of the coil and the circuit board assembly from a viewing angle provided in the first embodiment of the utility model;

[0033] Figure 3 It is a structural schematic diagram of the assembly body provided in the first embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the structure of the upper cover provided in the first embodiment of the utility model;

[0035] Figure 5 It is a partial cross-sectional view of the assembly structure of the coil and the circuit board assembly provided in the first embodiment of the utility model;

[0036] Figure 6 It is a structural schematic diagram of a circuit board assembly provided in Embodiment 1 of the present utility model;

[0037] Figure 7 It is a partial diagram of an assembly diagram of an assembly body and a circuit board assembly provided in the first embodiment of the utility model;

[0038] Figure 8It is a partial view of an assembly diagram of a coil skeleton, a circuit board assembly, and an assembly structure of the coil and the circuit board assembly from another perspective provided in the first embodiment of the present utility model;

[0039] Fig. 9 It is an assembly diagram of the coil skeleton, the circuit board assembly and the assembly structure of the coil and the circuit board assembly provided in the second embodiment of the present utility model;

[0040] Fig.10 This is an assembly diagram of an assembly body and a circuit board assembly provided in Embodiment 2 of the present utility model;

[0041] Fig.11 This is a schematic diagram of the structure of the upper cover provided in the second embodiment of the utility model;

[0042] Fig.12 It is a partial view of a cross-sectional view of a coil skeleton, a circuit board assembly, and an assembly structure of the coil and the circuit board assembly provided in the second embodiment of the present utility model.

[0043] In the figure:

[0044] 10. Coil skeleton; 11. Second buckle; 12. First overlap surface; 13. Wire clamping groove; 20. Circuit board assembly; 201. Main circuit board; 202. Switch assembly; 2021. Switch circuit board; 20211. Through hole; 20212. Third connection hole; 2022. Switch;

[0045] 100, assembly body; 110, coil installation cavity; 111, limit slot group; 1111, second slot; 1112, third slot; 112, limit flange; 120, circuit board installation cavity; 1201, main circuit board installation cavity; 1202, switch assembly installation cavity; 12021, clamp arm; 12022, elastic buckle; 121, limit guide groove; 1211, open; 1212, limit surface; 122, first limit boss; 123, first connecting column; 1231, first connecting hole; 130, lock tongue; 140, first slot; 150, first avoidance gap; 160, threading groove; 170, limit plate;

[0046] 200, upper cover; 210, lock buckle; 211, buckle hole; 212, inclined guide surface; 220, second limiting boss; 221, notch; 230, second connecting column; 231, second connecting hole; 240, first buckle; 250, limiting retaining edge; 260, second avoidance gap; 270, second overlapping surface. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Embodiment 1

[0052] This embodiment provides an assembly structure of a coil and a circuit board assembly, which integrates the coil and the circuit board assembly together, reduces the difficulty of installing the coil and the circuit board assembly, and has a small longitudinal dimension, which is suitable for situations where the space in the contactor housing is small.

[0053] At present, the coil is generally wound on a coil frame, so the assembly structure of the coil and the circuit board assembly provided in this embodiment can integrate the coil and the circuit board assembly. Since winding the coil on the coil frame is an existing technology, the connection method between the coil and the coil frame will not be described in detail.

[0054] Specifically, Figure 1-Figure 4 As shown, the assembly structure of the coil and the circuit board assembly includes an assembly body 100 and an upper cover 200. Among them, along the length direction of the assembly body 100, a coil installation cavity 110 for installing the coil skeleton 10 and a circuit board installation cavity 120 for installing the circuit board assembly 20 are arranged in parallel on the assembly body 100, and the coil installation cavity 110 and the circuit board installation cavity 120 make the axis of the coil skeleton 10 parallel to the axis of the circuit board assembly 20. By setting the coil installation cavity 110 and the circuit board installation cavity 120, the coil and the circuit board assembly 20 can be assembled in an integrated manner. Compared with the assembly method of encapsulating the coil and the circuit board assembly 20 by thermosetting materials in the prior art, the installation process is simpler, the scrap rate is low, and the secondary utilization rate is high. In addition, by setting the axis of the coil skeleton 10 to be parallel to the center line of the circuit board assembly 20, compared with the prior art in which the axis of the coil skeleton is perpendicular to the center line of the circuit board assembly, the space occupied in the longitudinal direction of the contactor is smaller, which can be applied to the case where the internal space of the contactor is smaller.

[0055] The assembly body 100 is also provided with a locking tongue 130, and the upper cover 200 is provided with a locking buckle 210, which is used to engage with the locking tongue 130 so that the upper cover 200 covers the opening of the circuit board installation cavity 120. By providing the upper cover 200, the circuit board assembly 20 can be protected, and the risk of short circuit of the circuit board assembly 20 is reduced. The upper cover 200 is fixed by engaging the locking tongue 130 with the locking buckle 210, which ensures the connection strength between the upper cover 200 and the assembly body 100, and also facilitates the installation and removal of the upper cover 200, thereby facilitating the assembly of the coil and the circuit board assembly 20.

[0056] In this embodiment, the axial direction of the coil and the centerline direction of the circuit board assembly 20 are both Figure 3 The axial direction of the coil installation cavity 110 and the axial direction of the circuit board installation cavity 120 are also Figure 3 The axis is in the direction shown by the Z axis.

[0057] Optionally, continue to see Figure 1 , Figure 3 and Figure 4In this embodiment, the lock buckle 210 includes a buckle hole 211 and an inclined guide surface 212 disposed on a side of the buckle hole 211 close to the lock tongue 130. The inclined guide surface 212 is inclined toward the buckle hole 211 along the installation direction of the upper cover 200. During the installation of the upper cover 200, the lock tongue 130 will first abut against the inclined guide surface 212, and continue to push the upper cover 200 to move along its own installation direction. The lock tongue 130 will slide on the inclined guide surface 212 and slide into the buckle hole 211 under the guidance of the inclined guide surface 212 and engage with the buckle hole 211. The lock buckle 210 has a simple structure and makes the installation of the upper cover 200 easier. Of course, in other embodiments, the structure of the lock buckle 210 can also be set to other structures, which can be set according to actual needs, and this application does not make specific limitations.

[0058] It should be noted that, in this embodiment, the installation direction of the upper cover 200 is parallel to the length direction of the assembly body 100, and is directed from the end of the circuit board installation cavity 120 away from the coil installation cavity 110 to the end of the circuit board installation cavity 120 close to the coil installation cavity 110, that is, Figure 3 The negative direction of the X axis.

[0059] Further, see Figure 2 and Figure 3 , the two opposite side walls of the circuit board installation cavity 120 are respectively provided with limiting guide grooves 121, and the limiting guide grooves 121 extend along the installation direction of the upper cover 200. Specifically, along the installation direction of the upper cover 200, one end of the limiting guide groove 121 is an opening 1211, and the other end is provided with a limiting surface 1212. When installing the upper cover 200, first insert the opposite ends of the upper cover 200 into the corresponding limiting guide grooves 121 through the openings 1211, and then push the upper cover 200 to slide in the limiting guide grooves 121 until the opposite ends of the upper cover 200 abut against the corresponding limiting surfaces 1212, at which time the upper cover 200 is installed in place, and the locking tongue 130 is snapped into the lock buckle 210. In this embodiment, the two opposite groove walls of the limiting guide groove 121 abut against the inner wall and the outer wall of the upper cover 200, respectively, to limit the displacement of the upper cover 200 along the axial direction of the circuit board installation cavity 120. The limiting guide groove 121 can not only guide the installation of the upper cover 200, but also limit the displacement of the upper cover 200 along its own installation direction, as well as the displacement of the upper cover 200 along the axial direction of the circuit board installation cavity 120, thereby improving the stability of the installation of the upper cover 200, and further improving the reliability of the upper cover 200 in protecting the circuit board assembly 20.

[0060] Further, see Figure 3 and Figure 4A first limiting boss 122 extends from the bottom wall of the circuit board installation cavity 120 along the axial direction of the circuit board installation cavity 120, and a second limiting boss 220 extends from the inner wall of the upper cover 200. A notch 221 is formed between the second limiting boss 220 and the inner wall of the upper cover 200, and the first limiting boss 122 is inserted into the notch 221. The cooperation between the first limiting boss 122 and the second limiting boss 220 can further fix the upper cover 200, improve the stability of the installation, and further improve the reliability of the upper cover 200 in protecting the circuit board assembly 20.

[0061] Optionally, in this embodiment, two first limiting bosses 122 are provided, and each first limiting boss 122 is provided with a corresponding second limiting boss 220. The two first limiting bosses 122 are arranged opposite to each other along the width direction of the assembly body 100, wherein the width direction of the assembly body 100 is Figure 3 In other embodiments, the number and arrangement of the first limiting bosses 122 may be other and may be arranged according to actual needs, and this application does not make any specific limitation.

[0062] In this embodiment, a demoulding opening is provided on the inner wall of the upper cover 200 at a position opposite to the second limiting boss 220 , and the demoulding opening facilitates demoulding of the second limiting boss 220 on the upper cover 200 .

[0063] Further, see Figure 3 and Figure 4 In a possible embodiment, the assembly body 100 is provided with a first card slot 140, and the inner wall of the upper cover 200 is further provided with a first card buckle 240, and the first card buckle 240 is used to engage with the first card slot 140. By providing the first card buckle 240 to engage with the first card slot 140, the connection strength between the upper cover 200 and the assembly body 100 can be improved, the risk of the upper cover 200 falling off can be reduced, and the reliability of the upper cover 200 protecting the circuit board assembly 20 can be improved.

[0064] Optionally, the first locking groove 140 may be recessed along the axial direction of the circuit board installation cavity 120 , and the first locking buckle 240 may extend along the axial direction of the circuit board installation cavity 120 .

[0065] like Figure 2-Figure 5 As shown, in another possible embodiment, a first avoidance notch 150 is provided on the side wall of the assembly body 100 close to the circuit board installation cavity 120, and a limiting rib 250 is provided on one side of the upper cover 200. The limiting rib 250 is placed in the first avoidance notch 150, and the limiting rib 250 abuts against the wall surface of the first avoidance notch 150 close to the circuit board installation cavity 120. Through the cooperation between the limiting rib 250 and the first avoidance notch 150, the position of the upper cover 200 can be further limited, thereby improving the stability of the installation of the upper cover 200.

[0066] In this embodiment, the assembly body 100 is provided with both a first locking groove 140 and a first avoidance gap 150 , and correspondingly, the upper cover 200 is provided with both a first buckle 240 and a limiting retaining edge 250 .

[0067] Furthermore, if Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the circuit board assembly 20 includes a main circuit board 201 and a switch assembly 202, and the circuit board installation cavity 120 includes a main circuit board installation cavity 1201 for installing the main circuit board 201 and a switch assembly installation cavity 1202 for installing the switch assembly 202. The upper cover 200 is provided with a second avoidance notch 260, and the second avoidance notch 260 is arranged opposite to the switch assembly 202. By providing the second avoidance notch 260, the switch assembly 202 can be exposed, so that the switch assembly 202 is easy to control.

[0068] Optionally, the main circuit board 201 can be packaged in the main circuit board installation cavity 1201 by means of glue filling, which has a simple process and is firmly installed.

[0069] Further, see Figure 6 and Figure 7 The switch assembly 202 includes a switch circuit board 2021 and a switch 2022 mounted on the switch circuit board 2021. A clamping arm 12021 and an elastic clamping buckle 12022 are respectively provided on opposite side walls of the switch assembly installation cavity 1202. The clamping arm 12021 is clamped to one end of the switch 2022, and the elastic clamping buckle 12022 passes through a through hole 20211 on the switch circuit board 2021 and is clamped to the other end of the switch 2022. The switch assembly 202 is fixed by the clamping arm 12021 and the elastic clamping buckle 12022, which has a simple structure, a good fixing effect, and is convenient for installation and removal.

[0070] Optionally, the length of the clamp arm 12021 can be the same as or similar to the length of one end of the switch 2022, so that the fixing effect is better. A plurality of elastic clamps 12022 can be provided, and the plurality of elastic clamps 12022 are arranged at intervals along the length direction of the other end of the switch 2022.

[0071] In this embodiment, two elastic buckles 12022 are provided. In other embodiments, three, four, etc. elastic buckles 12022 can also be provided, which can be provided according to actual needs, and this application does not make specific limitations.

[0072] Furthermore, if Figure 2 , Figure 3 and Figure 8As shown, a limiting slot group 111 and a limiting flange 112 are provided on the inner wall of the coil installation cavity 110, and the limiting slot group 111 and the limiting flange 112 are arranged relatively along the axial direction of the coil installation cavity 110. Specifically, the limiting slot group 111 includes a second slot 1111 away from the circuit board installation cavity 120 and a third slot 1112 close to the circuit board installation cavity 120; the opposite ends of the first board surface of the coil skeleton 10 are respectively clamped in the second slot 1111 and the third slot 1112, and the second buckle 11 on the second board surface of the coil skeleton 10 abuts against the outer wall of the limiting flange 112.

[0073] When installing the coil skeleton 10, first insert the first plate surface of the coil skeleton 10 into the coil installation cavity 110, and then press the coil skeleton 10 along the axial direction of the coil installation cavity 110 until the opposite ends of the coil skeleton 10 are respectively inserted into the corresponding second slot 1111 and third slot 1112. At this time, the second buckle 11 of the coil skeleton 10 also abuts against the outer wall of the limiting flange 112.

[0074] The coil frame 10 is fixed by the limiting slot group 111 and the limiting flange 112 , which has a simple structure and is easy to process. The first plate surface and the second plate surface of the coil frame 10 are limited, thereby improving the installation stability of the coil frame 10 .

[0075] Optionally, continue to see Figure 2 and Figure 3 In this embodiment, two second card slots 1111 and two third card slots 1112 are provided, and the four corners of the first plate surface of the coil skeleton 10 are respectively connected to the corresponding second card slots 1111 and third card slots 1112. The four corners of the first plate surface of the coil skeleton 10 are fixed by two second card slots 1111 and two third card slots 1112, which can improve the force uniformity of the coil skeleton 10 and better fix the circumference of the coil skeleton 10.

[0076] Optionally, continue to attend Figure 3 and Figure 8 In this embodiment, there are four limiting flanges 112, which are respectively arranged at the four corners of the coil installation cavity 110, and each limiting flange 112 is correspondingly provided with a second buckle 11. In other embodiments, the number and arrangement of the limiting flanges 112 can also be other, which can be arranged according to actual needs.

[0077] Further, see Figure 3 The assembly body 100 is also provided with a threading groove 160 connecting the third card slot 1112 and the circuit board installation cavity 120. The lead wire of the coil enters the circuit board installation cavity 120 through the threading groove 160 and is electrically connected to the circuit board assembly 20. The threading groove 160 facilitates the connection between the coil and the circuit board assembly 20.

[0078] Further, see Figure 2 and Figure 3 The upper cover of the threading slot 160 is provided with a limit plate 170, one side of the limit plate 170 abuts against the portion of the coil frame 10 that is clamped in the third clamping slot 1112, and the other side abuts against the upper cover 200. By providing the limit plate 170, on the one hand, the lead wire of the coil in the threading slot 160 can be protected; on the other hand, the coil frame 10 and the upper cover 200 can be limited, thereby improving the stability of the installation of the coil frame 10 and the upper cover 200.

[0079] Embodiment 2

[0080] This embodiment provides an assembly structure of a coil and a circuit board assembly, which is substantially the same as the structure of the first embodiment, and is only improved on the basis of the first embodiment. Therefore, only the differences between the two are described here, and the same structures of this embodiment and the first embodiment are not repeated here.

[0081] Specifically, Figure 9-11 As shown, the assembly structure of the coil and the circuit board assembly provided in this embodiment is that the bottom wall of the circuit board installation cavity 120 extends along its axial direction with a first connecting column 123, and the inner wall of the upper cover 200 extends with a second connecting column 230. The first connecting column 123 is provided with a first connecting hole 1231, and the second connecting column 230 is provided with a second connecting hole 231. The first connecting member (not shown in the figure) is connected to the second connecting hole 231 by passing through the first connecting hole 1231 and the second connecting hole 231 through the outer bottom wall of the circuit board installation cavity 120. The upper cover 200 is fixed by the first connecting member, and the connection strength is high, which greatly reduces the risk of the upper cover 200 falling off, and the structure is simple, and installation and disassembly are also relatively convenient.

[0082] The first connection column 123 can improve the structural strength of the assembly body 100 , and the second connection column 230 can improve the structural strength of the upper cover 200 .

[0083] Preferably, both the first connecting pillar 123 and the second connecting pillar 230 have insulating properties to insulate the first connecting member and prevent the first connecting member from being charged.

[0084] It can be understood that the first connecting member may be, but is not limited to, a bolt.

[0085] Optionally, in this embodiment, two first connecting posts 123 are provided, and each first connecting post 123 is provided with a corresponding second connecting post 230. The two first connecting posts 123 are arranged opposite to each other along the width direction of the assembly body 100. In other embodiments, the number and arrangement of the first connecting posts 123 may also be other, and may be arranged according to actual needs, and this application does not make specific limitations.

[0086] Further, see Fig.10 The switch circuit board 2021 is provided with a third connection hole 20212, the side wall of the switch assembly installation cavity 1202 is provided with a fourth connection hole (not shown in the figure), and the second connection member (not shown in the figure) passes through the third connection hole 20212 and is connected to the fourth connection hole. The switch assembly 202 is fixed in the switch assembly installation cavity 1202 by the second connection member, and the fixing effect is better, and the installation and removal are relatively simple.

[0087] It is understandable that the second connecting member may be, but is not limited to, a bolt.

[0088] Optionally, the third connection hole 20212 can be set at one end of the switch circuit board 2021, and the other end is clamped by the clamping arm 12021. The third connection holes 20212 can also be set at both opposite ends of the switch circuit board 2021, which can be set according to actual needs, and this application does not make specific limitations.

[0089] Furthermore, if Fig. 9 and Fig.12 As shown, the portion of the coil frame 10 that is engaged with the third engagement slot 1112 extends into the upper portion of the threading slot 160 and abuts against the upper cover 200. The coil frame 10 and the upper cover 200 are mutually limited, and no other limiting structure is required, so the structure is relatively simple. Moreover, after the coil frame 10 abuts against the upper cover 200, the opening above the threading slot 160 can be blocked, thereby protecting the lead wire of the coil in the threading slot 160.

[0090] Optionally, in this embodiment, the portion of the coil skeleton 10 that is engaged with the third engagement slot 1112 is provided with a first overlap surface 12, the upper cover 200 is provided with a second overlap surface 270, and the first overlap surface 12 overlaps the second overlap surface 270. This arrangement can improve the blocking effect of the coil skeleton 10 and the upper cover 200 on the threading groove 160, and reduce the risk of external impurities or water entering the threading groove 160 through the gap between the coil skeleton 10 and the upper cover 200.

[0091] Embodiment 3

[0092] This embodiment provides a contactor, including a coil, a coil skeleton 10, a circuit board assembly 20, and an assembly structure of the coil and the circuit board assembly provided in the first or second embodiment.

[0093] Specifically, the coil is wound around the coil frame 10, the coil frame 10 is installed in the coil installation cavity 110, and the circuit board assembly 20 is installed in the circuit board installation cavity 120. The contactor can integrate the coil and the circuit board assembly 20, which is convenient for assembling the coil and the circuit board assembly 20. After assembly, the coil and the circuit board assembly 20 occupy less space, which is conducive to improving the compactness of the contactor structure.

[0094] Further, see Figure 1 The coil frame 10 is provided with a wire clamping groove 13 at the end thereof near the circuit board mounting cavity 120. The wire clamping groove 13 is used to fix the lead wire of the coil. By providing the wire clamping groove 13, the lead wire can be prevented from loosening when the coil is wound.

[0095] Optionally, in this embodiment, two wire clamping grooves 13 are provided, and each wire clamping groove 13 is arranged at the portion of the coil skeleton 10 clamped to the third clamping groove 1112 to facilitate the electrical connection between the lead wire and the circuit board assembly 20 .

[0096] 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. An assembly structure of a coil and a circuit board assembly, wherein the coil is wound around a coil frame (10), characterized in that: The assembly structure of the coil and the circuit board assembly includes: An assembly body (100), wherein a coil installation cavity (110) for installing the coil skeleton (10) and a circuit board installation cavity (120) for installing the circuit board assembly (20) are arranged in parallel on the assembly body (100) along the length direction of the assembly body (100), wherein the coil installation cavity (110) and the circuit board installation cavity (120) make the axis of the coil skeleton (10) parallel to the center line of the circuit board assembly (20), and a locking tongue (130) is also arranged on the assembly body (100); An upper cover (200) is arranged to cover the opening of the circuit board installation cavity (120), and a lock buckle (210) is provided on the upper cover (200), and the lock buckle (210) is used to be engaged with the lock tongue (130).

2. The assembly structure of the coil and circuit board assembly according to claim 1, characterized in that: The lock buckle (210) comprises a buckle hole (211) and an inclined guide surface (212) arranged on a side of the buckle hole (211) close to the lock tongue (130); the inclined guide surface (212) is inclined toward the buckle hole (211) along the installation direction of the upper cover (200); and the lock tongue (130) is inserted into the buckle hole (211) by the guidance of the inclined guide surface (212).

3. The assembly structure of the coil and circuit board assembly according to claim 1, characterized in that: The two opposite side walls of the circuit board installation cavity (120) are respectively provided with limiting guide grooves (121) extending along the installation direction of the upper cover (200); one end of the limiting guide groove (121) is an opening (1211), and the other end is provided with a limiting surface (1212); the opposite two ends of the upper cover (200) are inserted into the corresponding limiting guide grooves (121) through the opening (1211) and abut against the corresponding limiting surfaces (1212).

4. The assembly structure of the coil and circuit board assembly according to claim 1, characterized in that: A first limiting boss (122) extends from the bottom wall of the circuit board installation cavity (120) along the axial direction of the circuit board installation cavity (120), a second limiting boss (220) extends from the inner wall of the upper cover (200), a notch (221) is formed between the second limiting boss (220) and the inner wall of the upper cover (200), and the first limiting boss (122) is inserted into the notch (221); or, A first connecting column (123) extends from the bottom wall of the circuit board installation cavity (120) along the axial direction of the circuit board installation cavity (120), and a second connecting column (230) extends from the inner wall of the upper cover (200); a first connecting hole (1231) is provided on the first connecting column (123), and a second connecting hole (231) is provided on the second connecting column (230); a first connecting member is connected to the first connecting hole (1231) and the second connecting hole (231) by penetrating the outer bottom wall of the circuit board installation cavity (120).

5. The assembly structure of the coil and circuit board assembly according to claim 1, characterized in that: The assembly body (100) is provided with a first card slot (140), and the inner wall of the upper cover (200) is provided with a first card buckle (240), and the first card buckle (240) is used to be engaged with the first card slot (140); and / or, A first avoidance notch (150) is provided on the side wall of the assembly body (100) close to the circuit board installation cavity (120), and a limiting rib (250) is provided on one side of the upper cover (200), wherein the limiting rib (250) is disposed in the first avoidance notch (150), and the limiting rib (250) abuts against the wall surface of the first avoidance notch (150) close to the circuit board installation cavity (120).

6. The assembly structure of the coil and circuit board assembly according to claim 1, characterized in that: The circuit board assembly (20) comprises a main circuit board (201) and a switch assembly (202); the circuit board installation cavity (120) comprises a main circuit board installation cavity (1201) for installing the main circuit board (201) and a switch assembly installation cavity (1202) for installing the switch assembly (202); a second avoidance notch (260) is provided on the upper cover (200); the second avoidance notch (260) is arranged opposite to the switch assembly (202).

7. The assembly structure of the coil and circuit board assembly according to claim 6, characterized in that: The switch assembly (202) comprises a switch circuit board (2021) and a switch (2022) mounted on the switch circuit board (2021); A clamping arm (12021) and an elastic clamping buckle (12022) are respectively provided on opposite side walls of the switch assembly installation cavity (1202), the clamping arm (12021) is clamped to one end of the switch (2022), and the elastic clamping buckle (12022) passes through a through hole (20211) on the switch circuit board (2021) and is clamped to the other end of the switch (2022); or, The switch circuit board (2021) is provided with a third connection hole (20212), the side wall of the switch (2022) installation cavity is provided with a fourth connection hole, and the second connection member passes through the third connection hole (20212) and is connected to the fourth connection hole.

8. The assembly structure of the coil and circuit board assembly according to any one of claims 1 to 7, characterized in that: A limiting slot group (111) and a limiting flange (112) are provided on the inner wall of the coil installation cavity (110); the limiting slot group (111) and the limiting flange (112) are arranged opposite to each other along the axial direction of the coil installation cavity (110); the limiting slot group (111) comprises a second slot (1111) away from the circuit board installation cavity (120) and a third slot (1112) close to the circuit board installation cavity (120); the opposite ends of the first board surface of the coil skeleton (10) are respectively clamped in the second slot (1111) and the third slot (1112); the second buckle (11) on the second board surface of the coil skeleton (10) abuts against the outer wall of the limiting flange (112).

9. The assembly structure of the coil and circuit board assembly according to claim 8, characterized in that: The assembly body (100) is also provided with a threading groove (160) connecting the third card slot (1112) and the circuit board installation cavity (120); the lead wire of the coil enters the circuit board installation cavity (120) through the threading groove (160) and is electrically connected to the circuit board assembly (20).

10. The assembly structure of the coil and circuit board assembly according to claim 9, characterized in that: The portion of the coil frame (10) that is engaged with the third engagement groove (1112) extends into the upper portion of the threading groove (160) and abuts against the upper cover (200); or, The upper cover of the threading groove (160) is provided with a limit plate (170), one side of the limit plate (170) abuts against the portion of the coil frame (10) that is clamped in the third clamping groove (1112), and the other side abuts against the upper cover (200).

11. A contactor, characterized in that The invention comprises a coil, a coil frame (10), a circuit board assembly (20) and an assembly structure of the coil and the circuit board assembly according to any one of claims 1 to 10, wherein the coil is wound around the coil frame (10), the coil frame (10) is installed in a coil mounting cavity (110), and the circuit board assembly (20) is installed in a circuit board mounting cavity (120).

12. The contactor according to claim 11, characterized in that: The coil frame (10) is provided with a wire clamping groove (13) at the end close to the circuit board installation cavity (120), and the wire clamping groove (13) is used to fix the lead wire of the coil.

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