Metal proximity switch and vehicle

Abstract

The utility model relates to proximity switch technical field especially relates to a kind of metal proximity switch and vehicle, metal proximity switch, including shell, coil, coil support, circuit board, signal connecting wire and shielding plate, installation cavity is equipped in the shell, the coil support and the circuit board are installed in the installation cavity, the coil is around and is equipped in the coil support, the coil is connected with the circuit board, the shell is equipped with the through-hole being communicated with the installation cavity, one end of the signal connecting wire is connected with the circuit board, the other end of the signal connecting wire is stretched out shell through the through-hole, the shell has the first sidewall and the second sidewall opposite along first direction, the shielding plate is located between the inner side surface of the second sidewall and the coil support, the outer side surface of the first sidewall is detection surface. Reduce the volume of metal proximity switch while improving the detection accuracy of metal proximity switch.

Description

Technical Field

[0001] This utility model relates to the field of proximity switch technology, and in particular to a metal proximity switch and a vehicle. Background Technology

[0002] Metal proximity switches are non-contact detection elements for metal targets.

[0003] An existing metal proximity switch includes a housing, a coil, a coil bracket, a circuit board, and a signal connection line. The coil bracket and the circuit board are installed inside the housing. The coil is wound on the coil bracket and connected to the circuit board. One end of the signal connection line is connected to the circuit board, and the other end is connected to the vehicle's infotainment system. The housing is installed near the vehicle's door latch. When the door is closed, the metal part to be tested on the door enters the magnetic field range generated by the coil, causing the magnetic field to attenuate. The circuit board transmits the signal to the vehicle's infotainment system through the signal connection line.

[0004] However, existing metal proximity switches typically increase their size to prevent metal objects other than the target metal part from interfering with detection. This avoids metal objects from entering the magnetic field range generated by the coil, resulting in a large overall size of the metal proximity switch. Summary of the Invention

[0005] This utility model provides a metal proximity switch, which aims to solve the problem that existing metal proximity switches have a large overall size in order to prevent detection interference from metal objects other than the target metal part.

[0006] To address the aforementioned problems, this utility model provides a metal proximity switch, comprising a housing, a coil, a coil support, a circuit board, a signal connection line, and a shielding plate. The housing has a mounting cavity, the coil support and the circuit board are mounted within the mounting cavity, the coil is wound around the coil support, and the coil is connected to the circuit board. The housing has a through hole communicating with the mounting cavity, one end of the signal connection line is connected to the circuit board, and the other end of the signal connection line extends out of the housing through the through hole. The housing has a first sidewall and a second sidewall opposite to each other along a first direction. The shielding plate is located between the inner side of the second sidewall and the coil support, and the outer side of the first sidewall is the detection surface.

[0007] Optionally, the shielding plate includes a first shielding part and a second shielding part, wherein the first shielding part is located between the inner side of the second sidewall and the coil support; The housing has a third sidewall and a fourth sidewall opposite to each other along a second direction, the second shielding part is perpendicular to the first shielding part, and the second shielding part is disposed between the inner sidewall of the third sidewall and the coil support. The second direction is perpendicular to the first direction.

[0008] Optionally, the inner side of the first sidewall is provided with a plug-in groove, and the end of the second shielding part away from the first shielding part is plugged into the plug-in groove.

[0009] Optionally, a positioning post is provided on the inner side of the first sidewall, and a positioning hole is provided on the coil bracket, with the positioning post passing through the positioning hole.

[0010] Optionally, a limiting ring platform is further protruding on the inner side of the first sidewall, the limiting ring platform being arranged around the positioning post, and the outer side of the coil bracket contacting the inner side of the limiting ring platform.

[0011] Optionally, the inner side of the limiting ring platform is provided with an anti-rotation block, and the coil bracket is provided with an anti-rotation groove, and the anti-rotation block is engaged with the anti-rotation groove.

[0012] Optionally, the coil support is provided with an annular mounting groove, and the coil is mounted in the annular mounting groove.

[0013] Optionally, the housing includes a front shell and a rear cover, the mounting cavity is disposed in the front shell, the front shell is provided with an opening for the circuit board, the coil bracket and the shielding plate to enter the mounting cavity, and the rear cover blocks the opening.

[0014] Optionally, the metal proximity switch further includes a mounting bracket connected to the housing, the mounting bracket being used to connect to the vehicle body.

[0015] According to the embodiment of this utility model, the metal proximity switch has a shielding plate disposed between the second side wall and the coil support, which can block the magnetic field generated by the coil between the second side wall and the coil, preventing the magnetic field from extending from the second side wall to the outside of the housing, and forming a magnetic field-free area on the outside of the second side wall. When the target metal part approaches the metal proximity switch from the outside of the first side wall, the magnetic field generated by the coil is attenuated, and the circuit board transmits the signal to the vehicle's infotainment system through the signal connection line. When a non-target metal part approaches the metal proximity switch from the outside of the second side wall, the magnetic field will not be attenuated, reducing the size of the metal proximity switch, improving the detection accuracy of the metal proximity switch, and avoiding misjudgment by the vehicle's infotainment system connected to the signal connection line.

[0016] This utility model embodiment also provides a vehicle, including a body and the aforementioned metal proximity switch, wherein the mounting bracket is connected to the body. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a metal proximity switch provided in an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the middle and front shell; Figure 3 for Figure 2 Another perspective; Figure 4 for Figure 2 Another perspective; Figure 5 for Figure 1 Schematic diagram of the mounting bracket; Figure 6 This is a schematic diagram of the assembly of the coil support and the coil; Figure 7 This is a schematic diagram of the shielding plate. Figure 8 This is a schematic diagram of the circuit board structure.

[0019] Reference numerals in the accompanying drawings: 1. Housing; 2. First sidewall; 3. Second sidewall; 4. Third sidewall; 5. Fourth sidewall; 6. Detection surface; 7. Mounting bracket; 8. Signal connection cable; 9. Plug; 10. Mounting cavity; 11. First chamber; 12. Second chamber; 13. Positioning post; 14. Limiting ring platform; 15. Anti-rotation block; 16. Clearance groove; 17. Through hole; 18. Limiting block; 19. Support part; 20. Support surface; 21. Limiting part; 22. Insertion hole; 23. Elastic hole; 24. 25. Elastic arm; 26. Insertion slot; 27. Observation hole; 28. Locking block; 29. ​​Inclined surface; 20. First mounting part; 31. Receiving groove; 32. Second mounting part; 33. Insertion pin; 34. Locking hole; 35. Coil bracket; 36. Positioning hole; 37. Annular mounting groove; 38. Anti-rotation groove; 39. Coil; 40. Copper wire; 41. Shielding plate; 42. First shielding part; 43. Second shielding part; 44. Rear cover; 45. Opening; 46. Front shell; 47. Circuit board; 48. Locking slot. Detailed Implementation

[0020] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figures 1 to 8 As shown, an embodiment of the present invention provides a metal proximity switch, including a housing 1, a coil 38, a coil support 34, a circuit board 46, a signal connection line 8, and a shielding plate 40. The housing 1 has a mounting cavity 10, the coil support 34 and the circuit board 46 are installed in the mounting cavity 10, the coil 38 is wound around the coil support 34, and the coil 38 is connected to the circuit board 46. The housing 1 has a through hole 17 communicating with the mounting cavity 10. One end of the signal connection line 8 is connected to the circuit board 46, and the other end of the signal connection line 8 extends out of the housing 1 through the through hole 17.

[0023] The housing 1 has a first sidewall 2 and a second sidewall 3 that are opposite each other along a first direction. The shielding plate 40 is located between the inner side of the second sidewall 3 and the coil support 34. The outer side of the first sidewall 2 is the detection surface 6.

[0024] In this embodiment, the shielding plate 40 is disposed between the second side wall 3 and the coil bracket 34, which can block the magnetic field generated by the coil 38 between the second side wall 3 and the coil 38, and prevent the magnetic field from extending from the second side wall 3 to the outside of the housing 1, forming a magnetic field-free area on the outside of the second side wall 3. When the target metal part approaches the metal proximity switch from the outside of the first side wall 2, i.e. the detection surface 6, the magnetic field generated by the coil 38 is attenuated. The circuit board 46 transmits the signal to the vehicle machine through the signal connection line 8. When a non-target metal part approaches the metal proximity switch from the outside of the second side wall 3, it will not cause magnetic field attenuation, reduce the size of the metal proximity switch, improve the detection accuracy of the metal proximity switch, and avoid misjudgment by the vehicle machine connected to the signal connection line 8.

[0025] In this embodiment, the first direction is the left-right direction of the metal proximity switch, and the second direction is the up-down direction of the metal proximity switch.

[0026] In this embodiment, the first sidewall 2 is the right sidewall of the housing 1, and the second sidewall 3 is the left sidewall of the housing 1.

[0027] In this embodiment, the coil 38 is electrically connected to the circuit board 46 via a copper wire 39.

[0028] In this embodiment, the end of the signal connection line 8 near the circuit board 46 is electrically connected to the circuit board 46 by soldering. The end of the signal connection line 8 extending out of the housing 1 is provided with a plug 9. The signal connection line 8 is plugged into the signal plug of the vehicle's infotainment system through the plug 9 to realize the electrical connection between the circuit board 46 and the infotainment system.

[0029] In one embodiment, the shielding plate 40 includes a first shielding part 41 and a second shielding part 42, wherein the first shielding part 41 is located between the inner side surface of the second sidewall 3 and the coil support 34.

[0030] The housing 1 has a third sidewall 4 and a fourth sidewall 5 that are opposite each other along the second direction. The second shielding part 42 is perpendicular to the first shielding part 41 and is disposed between the inner side of the third sidewall 4 and the coil support 34.

[0031] The second direction is perpendicular to the first direction.

[0032] In this embodiment, the third sidewall 4 is the top sidewall of the housing 1, and the fourth sidewall 5 is the bottom sidewall of the housing 1.

[0033] In this embodiment, the first shielding part 41 is perpendicular to the second shielding part 42, so that the shielding plate 40 is L-shaped.

[0034] In this embodiment, the first shielding part 41 is disposed between the second side wall 3 and the coil 38, and the second shielding part is disposed between the third side wall 4 and the coil 38. The first shielding part 41 can form a magnetic field-free region outside the second side wall 3, and the second shielding part 42 can form a magnetic field-free region outside the third side wall 4.

[0035] In this embodiment, when a non-target metal part approaches the metal proximity switch from the outside of the top side wall and the outside of the left side wall, it will not cause magnetic field attenuation.

[0036] In one embodiment, a plug groove 25 is provided on the inner side surface of the first sidewall 2, and the end of the second shielding part 42 away from the first shielding part 41 is plugged into the plug groove 25.

[0037] In this embodiment, the inner side of the first sidewall 2 is provided with an insertion groove 25 recessed into the inner side of the first sidewall 2.

[0038] In this embodiment, the insertion slot 25 extends along the front-rear direction of the metal proximity switch.

[0039] In this embodiment, the end of the second shielding part 42 away from the first shielding part 41 is inserted into the insertion slot 25 to connect the shielding plate 40, so that the insertion slot 25 can limit the second shielding part 42 and the shielding plate 40, and prevent the shielding plate 40 from contacting the coil bracket 34 and the coil 38.

[0040] In one embodiment, a positioning post 13 is provided on the inner side of the first sidewall 2, and a positioning hole 35 is provided on the coil bracket 34, with the positioning post 13 passing through the positioning hole 35.

[0041] In this embodiment, the mounting cavity 10 is provided with a first chamber 11 and a second chamber 12, with the first chamber 11 located above the second chamber 12.

[0042] In this embodiment, the positioning post 13 is located at the center of the first chamber 11, and the cross section of the positioning post 13 is in the shape of a cross.

[0043] In this embodiment, the coil support 34 is sleeved on the positioning post 13, and the outer peripheral surface of the positioning post 13 is in contact with the inner wall of the positioning hole 35.

[0044] In this embodiment, the positioning post 13 is provided to facilitate the installation of the coil bracket 34.

[0045] In this embodiment, the circuit board 46 is installed inside the second chamber 12.

[0046] In one embodiment, a limiting ring platform 14 is also provided on the inner side surface of the first sidewall 2. The limiting ring platform 14 is arranged around the positioning post 13, and the outer side surface of the coil bracket 34 contacts the inner side surface of the limiting ring platform 14.

[0047] In this embodiment, the coil support 34 is circular, and the limiting ring platform 14 is arranged around the positioning post 13. The limiting ring platform 14 and the coil support 34 are coaxially arranged.

[0048] In this embodiment, the limiting ring platform 14 limits the movement between the coils 38.

[0049] In this embodiment, the top of the limiting ring platform 14 is provided with a notch, and the outer side of the notch of the limiting ring platform 14 and the inner side of the third side wall 4 form the above-mentioned insertion groove 25.

[0050] In one embodiment, an anti-rotation block 15 is provided on the inner side of the limiting ring platform 14, and an anti-rotation groove 37 is provided on the coil bracket 34, with the anti-rotation block 15 engaging with the anti-rotation groove 37.

[0051] In this embodiment, the anti-rotation block 15 protrudes from the inner side of the limiting ring platform 14, and the coil bracket 34 is provided with an anti-rotation groove 37. The anti-rotation block 15 is engaged in the anti-rotation groove 37, which can prevent the limiting ring platform 14 from rotating around the positioning post 13.

[0052] In one embodiment, the coil support 34 is provided with an annular mounting groove 36, and the coil 38 is mounted in the annular mounting groove 36.

[0053] In this embodiment, the annular mounting groove 36 is located on the side of the coil bracket 34 facing away from the first sidewall 2, and the annular mounting groove 36 is arranged around the through hole 17.

[0054] In this embodiment, the coil 38 is arranged around the positioning post 13 and installed in the annular mounting groove 36. The inner side of the annular mounting groove 36 limits the coil 38 to prevent the coil 38 from shaking.

[0055] In this embodiment, two clearance grooves 16 are provided on the limiting ring platform 14 near the anti-rotation block 15. The clearance hole connects the first chamber 11 and the second chamber 12. The copper wire 39 connected to the coil 38 enters the second chamber 12 from the annular mounting groove 36 through the clearance hole, which facilitates the arrangement of the copper wire 39.

[0056] In this embodiment, a limiting block 18 extending in the left-right direction is provided on the inner side of the second chamber 12, and the limiting block 18 protrudes from the inner side of the second chamber 12.

[0057] In this embodiment, the limiting block 18 includes a support part 19 and a limiting part 21. The side of the support part 19 facing away from the first sidewall 2 is the support surface 20, and the side of the circuit board 46 facing the first sidewall 2 contacts the support surface 20.

[0058] In this embodiment, the limiting part 21 is provided on the support surface 20. The limiting part 21 has a limiting tip on one side facing away from the housing 1. The circuit board 46 has a slot 47 on one side facing the first side wall 2. The slot 47 is located at the edge of the circuit board 46. When the circuit board 46 is installed into the second chamber 12, the inner wall of the slot 47 facing the first side wall 2 contacts the support surface 20, and the limiting tip abuts against the peripheral edge of the circuit board 46.

[0059] In other embodiments, the slot can be provided on the peripheral edge of the circuit board 46. When the circuit board 46 is installed into the second chamber 12, the side of the circuit board 46 facing the first sidewall 2 contacts the support surface 20, and the limiting clip tip is inserted into the slot 47 of the circuit board 46, thereby limiting the circuit board 46.

[0060] In one embodiment, the housing 1 includes a front housing 45 and a rear cover 43. The mounting cavity 10 is disposed in the front housing 45. The front housing 45 is provided with an opening 44 for the circuit board 46, the coil bracket 34 and the shielding plate 40 to enter the mounting cavity 10. The rear cover 43 blocks the opening 44.

[0061] In this embodiment, the opening 44 facilitates the entry of the circuit board 46, coil bracket 34, and shielding plate 40 into the mounting cavity 10.

[0062] In this embodiment, there is a gap between each side of the circuit board 46 and the inner side of the second chamber 12 of the housing 1, and the back cover 43 is directly molded in the mounting cavity 10 by potting glue in the mounting cavity 10.

[0063] In one embodiment, the metal proximity switch further includes a mounting bracket 7 connected to the housing 1, and the mounting bracket 7 is used to connect to the vehicle body.

[0064] In this embodiment, the mounting bracket 7 is generally "H" shaped, and the mounting bracket 7 includes a first mounting part 29 and a second mounting part 31, with the first mounting part 29 located above the second mounting part.

[0065] In this embodiment, the first mounting part 29 is provided with a receiving groove 30, which is used for the part of the car body that is inserted into the car body to be inserted. The first mounting part 29 is fixed to the car body by means of screws inserted into the receiving groove 30 and the car body.

[0066] In this embodiment, the second mounting part 31 includes a plug pin 32, and a plug hole 22 is provided on the outer side surface of the third side wall 4 of the housing 1, and the plug pin 32 is inserted into the plug hole 22.

[0067] In this embodiment, the plug pin 32 is provided with a locking hole 33, and the inner wall of the plug hole 22 is provided with a locking block 27. When the plug pin 32 is inserted into the plug hole 22, the locking block 27 is locked in the locking hole 33, thereby limiting the plug pin 32.

[0068] In this embodiment, the housing 1 is provided with an elastic hole 23 communicating with the insertion hole 22. An elastic arm 24 is provided in the elastic hole 23. A locking block 27 is provided on the inner side of the elastic wall. The upper side of the locking block 27 is an inclined surface 28. The distance between the top of the inclined surface 28 and the detection surface 6 is less than the distance between the bottom of the inclined surface 28 and the detection surface 6. When the insertion pin 32 is inserted into the insertion hole 22, the bottom of the insertion pin 32 contacts the inclined surface 28 first. During the process of continuing to insert the insertion pin 32 downward, the elastic wall is forced to swing away from the detection surface 6. After the locking hole 33 passes the locking block 27, the elastic wall swings towards the detection surface 6, so that the locking block 27 is locked into the locking hole 33.

[0069] In this embodiment, the first sidewall 2 is provided with an observation hole 26 that communicates with the insertion hole 22. The observation hole 26 is directly opposite the card block 27, which facilitates observation of the card block 27 and the card hole 33.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] According to the embodiment of the present invention, the metal proximity switch has a shielding plate 40 disposed between the second side wall 3 and the coil bracket 34. This shielding plate can block the magnetic field generated by the coil 38 between the second side wall 3 and the coil 38, preventing the magnetic field from extending from the second side wall 3 to the outside of the housing 1. A magnetic field-free area is formed on the outside of the second side wall 3. When a target metal part approaches the metal proximity switch from the outside of the first side wall 2, the magnetic field generated by the coil 38 is attenuated. The circuit board 46 transmits the signal to the vehicle's infotainment system through the signal connection line 8. When a non-target metal part approaches the metal proximity switch from the outside of the second side wall 3, the magnetic field will not be attenuated. This improves the detection accuracy of the metal proximity switch, reduces the size of the metal proximity switch, and avoids misjudgment by the vehicle's infotainment system connected to the signal connection line 8.

[0072] In addition, one embodiment of the present invention also provides a vehicle, including a vehicle body and the aforementioned metal proximity switch, with the mounting bracket 7 connected to the vehicle body.

[0073] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A metal proximity switch, characterized in that, The device includes a housing (1), a coil (38), a coil support (34), a circuit board (46), a signal connection line (8), and a shielding plate (40). The housing (1) has an installation cavity (10). The coil support (34) and the circuit board (46) are installed in the installation cavity (10). The coil (38) is wound around the coil support (34) and connected to the circuit board (46). The housing (1) has a through hole (17) communicating with the installation cavity (10). One end of the signal connection line (8) is connected to the circuit board (46), and the other end of the signal connection line (8) extends out of the housing (1) through the through hole (17). The housing (1) has a first sidewall (2) and a second sidewall (3) opposite to each other in a first direction. The shielding plate (40) is located between the inner side of the second sidewall (3) and the coil support (34). The outer side of the first sidewall (2) is the detection surface (6).

2. The metal proximity switch according to claim 1, characterized in that, The shielding plate (40) includes a first shielding part (41) and a second shielding part (42), wherein the first shielding part (41) is located between the inner side of the second sidewall (3) and the coil support (34); The housing (1) has a third sidewall (4) and a fourth sidewall (5) opposite each other in the second direction. The second shielding part (42) is perpendicular to the first shielding part (41). The second shielding part (42) is disposed between the inner side of the third sidewall (4) and the coil support (34). The second direction is perpendicular to the first direction.

3. The metal proximity switch according to claim 2, characterized in that, The inner side of the first sidewall (2) is provided with a plug groove (25), and the end of the second shield (42) away from the first shield (41) is plugged into the plug groove (25).

4. The metal proximity switch according to claim 2, characterized in that, The inner side of the first sidewall (2) is provided with a positioning post (13), and the coil bracket (34) is provided with a positioning hole (35), and the positioning post (13) passes through the positioning hole (35).

5. The metal proximity switch according to claim 4, characterized in that, A limiting ring platform (14) is also protruding on the inner side of the first sidewall (2). The limiting ring platform (14) is arranged around the positioning post (13). The outer side of the coil bracket (34) is in contact with the inner side of the limiting ring platform (14).

6. The metal proximity switch according to claim 5, characterized in that, The inner side of the limiting ring platform (14) is provided with an anti-rotation block (15), and the coil bracket (34) is provided with an anti-rotation groove (37). The anti-rotation block (15) is engaged with the anti-rotation groove (37).

7. The metal proximity switch according to claim 6, characterized in that, The coil support (34) is provided with an annular mounting groove (36), and the coil (38) is mounted in the annular mounting groove (36).

8. The metal proximity switch according to claim 1, characterized in that, The housing (1) includes a front housing (45) and a rear cover (43). The mounting cavity (10) is disposed on the front housing (45). The front housing (45) has an opening (44) for the circuit board (46), the coil bracket (34) and the shielding plate (40) to enter the mounting cavity (10). The rear cover (43) blocks the opening (44).

9. The metal proximity switch according to claim 1, characterized in that, The metal proximity switch also includes a mounting bracket (7), which is connected to the housing (1) and is used to connect to the vehicle body.

10. A vehicle, characterized in that, The vehicle includes a vehicle body and a metal proximity switch as described in any one of claims 1 to 9, wherein the mounting bracket (7) is connected to the vehicle body.

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