Coil component and valve device

Abstract

The invention provides a coil assembly and a valve device, the coil assembly comprises a coil, a lead and a metal connecting piece, the metal connecting piece is fixedly connected with the coil, the lead comprises a shielding layer leading-out part, the shielding layer leading-out part is directly or indirectly connected with the metal connecting piece, and the shielding layer leading-out part is fixedly connected with the metal connecting piece. And the shielding layer lead-out part comprises a woven mesh layer lead-out part and a metal foil layer lead-out part. The valve device comprises a valve body and a coil assembly, a coil of the coil assembly is arranged on the outer side of the valve body in a sleeving mode, a connecting plate is arranged on the outer side of the valve body, and the connecting plate is connected with the metal connecting piece. According to the coil assembly provided by the invention, signal shielding can be relatively realized, and signal interference resistance is realized.

Description

Technical Field

[0001] The present application relates to the field of electromagnetic control technology, and in particular to a coil assembly that can be used in a valve device and a valve device using the coil assembly. Background Art

[0002] Coil components are often installed on valve devices for excitation, including injection-molded parts, lead parts, epoxy resin layers, etc. The combination of injection-molded parts and lead parts is prone to electromagnetic interference, especially when used in automotive products. The inability to shield the signal leads to signal disorder. Summary of the Invention

[0003] In order to solve the above technical problems, the present application provides a coil assembly with a new structure, which can relatively achieve signal shielding and resist signal interference.

[0004] The present invention provides a coil assembly, which includes a coil, a lead wire and a metal connector, wherein the metal connector is fixedly connected to the coil, the lead wire includes a shielding layer lead-out portion, the shielding layer lead-out portion is directly or indirectly connected to the metal connector, and the shielding layer lead-out portion includes a woven mesh layer lead-out portion and a metal foil layer lead-out portion.

[0005] The present application also provides a valve device, which includes a valve body and a coil assembly provided in the present application. The coil of the coil assembly is sleeved on the outside of the valve body. A connecting plate is provided on the outside of the valve body, and the connecting plate is connected to the metal connecting piece.

[0006] The coil assembly provided in the present application has a shielding layer lead-out portion provided on the lead wire, and the shielding layer lead-out portion includes a woven mesh layer lead-out portion and a metal foil layer lead-out portion, which can reflect and absorb external interference electromagnetic signals. The shielding layer lead-out portion is directly or indirectly connected to the metal connector, and the metal connector is connected to the coil. When used in a valve device, the metal connector is connected to the connecting plate on the outside of the valve body, which can relatively achieve signal shielding and anti-signal interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A front view of an embodiment of a coil assembly provided by the present application;

[0008] Figure 2 for Figure 1 Right view;

[0009] Figure 3 for Figure 1 A top view of

[0010] Figure 4 is a cross-sectional view of the lead;

[0011] Figure 5 for Figure 1 Axonometric view of the metal connector;

[0012] Figure 6 for Figure 5 Front view of

[0013] Figure 7 for Figure 1 Axonometric view of the middle terminal block;

[0014] Figure 8 for Figure 7 Front view of

[0015] Figure 9 for Figure 7 Right view;

[0016] Figure 10 for Figure 7 A top view of

[0017] Figure 11 for Figure 1 Axonometric view of the middle riveted part;

[0018] The following are the descriptions of the reference numerals:

[0019] 10 coil; 101 housing, 1011 cylindrical portion, 1012 convex portion, A slot portion, B end surface, 102 cover, 103 cap;

[0020] 20 lead wire, 201 conductor, 202 insulation layer, 203 shielding layer, 2031 metal foil layer, 2032 braided mesh layer, 204 sheath, 205 shielding layer lead-out portion;

[0021] 30 metal connector, 301 second connecting plate, 302 plug-in portion, 3021 plug-in plate, 3022 hole portion, 3023 convex tooth portion, 303 positioning portion, 304 second riveting hole portion;

[0022] 40 connection terminal, 401 first connection plate, 402 supporting portion, 403 pressing portion, 404 first riveting hole portion, 405 notch portion;

[0023] 50 rivet, 501 column, 502 first limiting portion, 503 second limiting portion. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] like Figure 1-Figure 3 As shown, the coil assembly provided by the present application includes a coil 10 , a lead wire 20 and a metal connector 30 .

[0026] The metal connector 30 is connected to the coil 10. More specifically, the coil 10 includes a winding and a housing 101 encapsulating the winding, and the metal connector 30 is connected to the housing 101 of the coil 10.

[0027] The lead 20 includes a shielding layer lead-out portion 205. The shielding layer lead-out portion 205 is directly or indirectly connected to the metal connector 30, allowing electromagnetic signals to be transmitted from the shielding layer lead-out portion 205 to the metal connector 30. The shielding layer lead-out portion 205 includes a braided mesh layer lead-out portion and a metal foil layer lead-out portion.

[0028] The valve device provided herein includes a valve body and a coil assembly provided herein. A coil 10 is mounted on the outside of the valve body. More specifically, coil 10 comprises a winding and a housing 101 enclosing the winding. Housing 101 comprises a cylindrical portion 1011, which is mounted on the outside of the valve body. A cap 103 may be provided at one end of cylindrical portion 1011. A connecting plate is provided on the outside of the valve body, connected to a metal connector 30, enabling electromagnetic signals to be transmitted from the metal connector 30 through the connecting plate to the valve body.

[0029] The coil assembly provided in the present application has a shielding layer lead-out portion provided on the lead wire, and the shielding layer lead-out portion includes a woven mesh layer lead-out portion and a metal foil layer lead-out portion, which can reflect and absorb external interference electromagnetic signals. The shielding layer lead-out portion is directly or indirectly connected to the metal connector, and the metal connector is connected to the coil. When used in a valve device, the metal connector is connected to the connecting plate on the outside of the valve body, which can relatively achieve signal shielding and anti-signal interference.

[0030] In the illustrated embodiment, the lead 20 further includes a shielding layer 203, such as Figure 4 As shown, shielding layer 203 includes a metal foil layer 2031 and a braided mesh layer 2032 located outside of metal foil layer 2031. Metal foil layer 2031 can specifically be a copper foil layer or an aluminum foil layer. A metal foil layer lead-out portion is corresponding to metal foil layer 2031, and a braided mesh layer lead-out portion is corresponding to braided mesh layer 2032. The metal foil layer lead-out portion and the braided mesh layer lead-out portion are respectively extended from metal foil layer 2031 and braided mesh layer 2032 and then twisted together (twisted into a strand) to form shielding layer lead-out portion 205. A heat shrink tubing can be provided outside shielding layer lead-out portion 205. Under the restraining effect of the heat shrink tubing, the twisted metal foil layer lead-out portion and the braided mesh layer lead-out portion are less likely to come apart.

[0031] In the illustrated embodiment, Figure 4As shown, the lead 20 further includes an insulating layer 202 located inside the shielding layer 203, conductive wires 201 located inside the insulating layer 202, and a sheath 204 located outside the shielding layer 203. Each conductive wire 201 is provided with a separate insulating layer 202. The number of conductive wires 201 is determined based on actual needs. In the figure, five conductive wires 201 are provided inside the lead 20, but the number is not limited to five.

[0032] In the illustrated embodiment, Figure 1-Figure 3 As shown, the coil assembly includes a terminal 40 and a rivet 50. The terminal 40 is connected to the shielding layer lead-out portion 205. Figure 7 As shown, the connection terminal 40 includes a first riveting hole portion 404. More specifically, the connection terminal 40 includes a first connecting plate 401, and the first riveting hole portion 404 is provided on the first connecting plate 401. Figure 5 As shown, the metal connector 30 includes a second rivet hole portion 304. More specifically, the metal connector 30 includes a second connecting plate 301, and the second rivet hole portion 304 is provided on the second connecting plate 301. Figure 11 As shown, the rivet 50 includes a column 501, a first limiting portion 502 and a second limiting portion 503. The column 501 passes through the first rivet hole 404 and the second rivet hole 304. The first limiting portion 502 abuts against the first connecting plate 401, and the second limiting portion 503 abuts against the second connecting plate 301, riveting the terminal 40 and the metal connector 30 together, so that the shielding layer lead-out portion 205 is indirectly connected to the metal connector 30 through the terminal 40 and the rivet 50.

[0033] In the illustrated embodiment, Figure 7-10 As shown, the terminal block 40 includes a supporting portion 402 and a pressing portion 403. The shielding layer lead-out portion 205 is pressed against the supporting portion 402 by the pressing portion 403, so that the shielding layer lead-out portion 205 is crimped and connected to the terminal block 40. In this way, the shielding layer lead-out portion 205 is firmly connected to the terminal block 40 and is not easily disconnected. In the figure, two pressing portions 403 are provided on each side of the supporting portion 402. The four pressing portions 403 are all bent above the supporting portion 402. A notch 405 is provided between the two pressing portions 403 on the same side so that the four pressing portions 403 can be bent independently without interfering with each other. After the shielding layer lead-out portion 205 is laid on the supporting portion 402, the four pressing portions 403 press the shielding layer lead-out portion 205 downward, so that the shielding layer lead-out portion 205 is clamped between the pressing portion 403 and the supporting portion 402.

[0034] The shielding layer lead portion 205 may also be directly connected to the metal connector 30, for example, it may be directly welded to the metal connector 30 or directly wrapped around the metal connector 30. The shielding layer lead portion 205 and the terminal 40 are not limited to being crimped, and may also be welded or screwed.

[0035] In the illustrated embodiment, Figure 3 As shown, the shell 101 of the coil 10 is provided with a slot portion A. More specifically, the shell 101 includes a cylindrical portion 1011 and a convex portion 1012, the convex portion 1012 is protruding from the outside of the cylindrical portion 1011, the slot portion A is arranged on the convex portion 1012, and the socket of the slot portion A is formed on one end face of the convex portion 1012. In addition, the coil 10 also includes a cover 102 and a pin (not visible in the figure). The cover 102 covers the outside of the convex portion 1012. A accommodating cavity is formed inside the cover 102. The circuit board electrically connected to the wire 201 of the lead 20 is accommodated in the accommodating cavity. One end of the pin is connected to the winding, and the other end of the pin protrudes from the convex portion 1012 and is inserted into the jack of the circuit board, so that the winding and the lead 20 are electrically conductive. In order to fix and protect the circuit board, sealant will be poured into the accommodating cavity,

[0036] In the illustrated embodiment, Figure 3 、 Figure 5 and Figure 6 As shown, the metal connector 30 includes a plug portion 302, which is inserted into the slot portion A. The slot portion 302 is located in the accommodating cavity of the housing 102. When sealant is poured into the accommodating cavity, the sealant flows into the slot portion 302. After the sealant solidifies, the relative position of the plug portion 302 and the slot portion A is fixed.

[0037] In the illustrated embodiment, Figure 5 As shown, the plug-in portion 302 includes an insert plate 3021, a hole portion 3022, and a protruding tooth 3023. The hole portion 3022 is provided in the insert plate 3021, and the protruding tooth 3023 protrudes from the insert plate 3021. After the plug-in portion 302 is inserted into the slot portion A, a cavity is formed between the protruding tooth 3023 and the insertion opening of the slot portion A. After the sealant in the cavity is cured, it acts as a retaining force for the protruding tooth 3023. After the sealant in the hole portion 3022 is cured, it also acts as a retaining force, making it difficult for the plug-in portion 302 to be removed from the insertion opening of the slot portion A, thereby ensuring the stability of the connection between the plug-in portion 302 and the slot portion A.

[0038] In the illustrated embodiment, Figure 5 As shown, the metal connector 30 further includes a positioning portion 303, which protrudes from a side of the second connecting plate 301 near the cylindrical portion 1011 of the housing 101. A positioning gap C is formed between the positioning portion 303 and one end surface B of the cylindrical portion 1011 of the housing 101. With this design, when the cylindrical portion 1011 of the housing 101 of the coil 10 is fitted onto the outside of the valve body, the connecting plate on the outside of the valve body is at least partially inserted into the positioning gap C, thereby ensuring a positional connection between the connecting plate on the outside of the valve body and the metal connector 30.

[0039] In the illustrated embodiment, the positioning portion 303 adopts a hemispherical structure. In this way, even when the connecting plate is slightly tilted, it can still maintain contact with the positioning portion 303, thereby preventing the grounding path from being disconnected due to the tilt of the connecting plate.

[0040] The principles and implementation methods of the present application have been described above using specific examples. The description of the above embodiments is only intended to help understand the core ideas of the present application. It should be noted that, for those skilled in the art, without departing from the principles of the present application, various improvements and modifications may be made to the present application, and such improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A coil assembly, characterized in that: The coil assembly comprises a coil (10), a lead wire (20) and a metal connector (30), wherein the metal connector (30) is fixedly connected to the coil (10), the lead wire (20) comprises a shielding layer lead-out portion (205), the shielding layer lead-out portion (205) is directly or indirectly connected to the metal connector (30), and the shielding layer lead-out portion (205) comprises a braided mesh layer lead-out portion and a metal foil layer lead-out portion.

2. The coil assembly according to claim 1, wherein The coil assembly includes a connecting terminal (40) and a rivet (50), wherein the connecting terminal (40) is connected to the shielding layer lead-out portion (205), the connecting terminal (40) includes a first rivet hole portion (404), and the metal connecting member (30) includes a second rivet hole portion (304). The rivet (50) passes through the first rivet hole portion (404) and the second rivet hole portion (304) to rivet the connecting terminal (40) and the metal connecting member (30) together.

3. The coil assembly according to claim 2, wherein: The connection terminal (40) comprises a supporting portion (402) and a pressing portion (403), and the shielding layer lead-out portion (205) is pressed against the supporting portion (402) by the pressing portion (403).

4. The coil assembly according to claim 1, wherein The coil (10) comprises a winding and a shell (101) encapsulating the winding, the shell (101) is provided with a slot portion (A), and the metal connector (30) comprises a plug-in portion (302), and the plug-in portion (302) is inserted into the slot portion (A).

5. The coil assembly according to claim 4, wherein: The plug-in portion (302) comprises an inserting plate (3021), a hole portion (3022) and a protruding tooth (3023), wherein the hole portion (3022) is provided on the inserting plate (3021) and the protruding tooth (3023) protrudes from the inserting plate (3021).

6. The coil assembly according to claim 4, wherein: The housing (101) includes a cylindrical portion (1011), and the metal connector (30) further includes a positioning portion (303), wherein a positioning gap (C) is formed between the positioning portion (303) and an end surface (B) of the cylindrical portion (1011).

7. The coil assembly according to claim 6, wherein: The positioning portion (303) is a hemispherical structure.

8. The coil assembly according to any one of claims 1 to 7, characterized in that: The lead wire (20) comprises a shielding layer (203), the shielding layer (203) comprises a metal foil layer (2031) and a braided mesh layer (2032) located outside the metal foil layer (2031), the braided mesh layer lead-out portion and the metal foil layer lead-out portion are respectively led out from the braided mesh layer (2032) and the metal foil layer (2031) and then twisted together to form the shielding layer lead-out portion (205), and a heat shrink tube is provided on the periphery of the shielding layer lead-out portion (205).

9. A valve device, characterized in that: The valve device comprises a valve body and a coil assembly according to any one of claims 1 to 8, wherein the coil (10) of the coil assembly is sleeved on the outside of the valve body, a connecting plate is provided on the outside of the valve body, and the connecting plate is connected to the metal connecting piece (30).

10. The valve device according to claim 9, characterized in that The metal connector (30) further includes a positioning portion (303), the coil (10) includes a winding and a shell (101) encapsulating the winding, the shell (101) includes a cylindrical portion (1011), a positioning gap (C) is formed between the positioning portion (303) and an end face (B) of the cylindrical portion (1011), and the connecting plate is inserted into the positioning gap (C) and is positioned and connected to the metal connector (30).

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