An automotive low-frequency antenna

Abstract

The present invention discloses a low-frequency antenna for an automobile, which includes a magnetic steel, PIN pins, a capacitor, and a coil bobbin wound with enameled wire. The magnetic steel and the PIN pins are respectively fixed to the coil bobbin, and the PIN pins include two units that are respectively and electrically connected to the two ends of the enameled wire. At least one unit includes at least two branches, and the at least two branches are connected in series through a capacitor. Each branch has a capacitor support portion for electrically connecting with the capacitor. The two capacitor support portions corresponding to the capacitor are respectively connected to the rest of the branch where they are located through narrow strips, or one of the two capacitor support portions corresponding to the capacitor is connected to the rest of the branch where it is located through a narrow strip, so as to release the connection stress of the capacitor through the narrow strip. The present invention can utilize the easily deformable characteristic of the narrow strip to release the connection stress of the capacitor, and can be used to replace the connection stress release method of suspending the part where the capacitor is located in the prior art, thereby avoiding the problems existing in the capacitor welding stress release method adopted in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of antennas, and in particular to a low-frequency antenna for a car. Background Art

[0002] The low-frequency antenna of a car generally includes a magnetic steel, a PIN pin and a coil frame wound with an enameled wire. The magnetic steel and the PIN pin are respectively fixed to the coil frame. The PIN pin has two parts that are electrically connected to the two ends of the enameled wire. In order to form an LC oscillation circuit and generate a corresponding frequency, at least a part of the PIN pin is divided into two branches, and a capacitor is connected in series between the two branches. The capacitor is generally connected to the two branches by welding, and this method will generate welding stress. For this reason, the existing technology mostly uses the method of suspending the part where the capacitor is located to release the stress. However, this method will result in the need to place a supporting component under the welding part of the capacitor when welding the capacitor, otherwise it will be inconvenient to weld, and it will cause the welding part of the capacitor to be easily deformed downward due to the welding force. Summary of the invention

[0003] The present invention aims at solving the technical problems in the prior art and provides a low-frequency antenna for a car.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a car low-frequency antenna, including a magnetic steel, a PIN pin, a capacitor and a coil frame wound with an enameled wire, the magnetic steel and the PIN pin are respectively fixed to the coil frame, and the PIN pin includes two units electrically connected to the two ends of the enameled wire one by one, at least one unit includes at least two branches, the at least two branches are connected in series through a capacitor, and each branch has a capacitor support part for electrically connecting to the capacitor; the two capacitor support parts corresponding to the capacitor are respectively connected to the rest of the branch where they are located through a narrow strip, or one of the two capacitor support parts corresponding to the capacitor is connected to the rest of the branch where it is located through a narrow strip, so as to release the connection stress of the capacitor through the narrow strip.

[0005] Furthermore, each capacitor support portion rests on the coil frame respectively.

[0006] Furthermore, each unit of the PIN pin has a plurality of pins extending downward, and the coil frame is provided with a plurality of sockets, and the pins are plugged into and matched with the sockets one by one; at least one pin of each unit has two opposite side surfaces provided with barb structures, and the pins are interference fit with the corresponding sockets through the barb structures.

[0007] Furthermore, before the PIN pins are fixed to the coil frame, the PIN pins are connected into one body through a plurality of connecting parts, and the coil frame is provided with a plurality of connecting material cutting and giving way structures corresponding to the plurality of connecting material parts one by one.

[0008] Further, one of the connecting material removal relief structures is a relief notch located at the edge position of the coil bobbin, and the other two connecting material removal relief structures are respectively relief through holes penetrating the coil bobbin.

[0009] Further, the coil bobbin includes an enameled wire winding portion and a PIN foot fixing portion. The PIN foot fixing portion is provided at one end of the enameled wire winding portion; the magnet is sleeved on the enameled wire winding portion, and the PIN foot is installed on the PIN foot fixing portion. The PIN foot fixing portion is provided with the connecting removal relief structure.

[0010] Further, the enameled wire winding portion includes a hollow winding cylinder, a first flange support portion provided at one end of the winding cylinder, and a second flange support portion provided at the other end of the winding cylinder. The first flange support portion is away from the PIN foot fixing portion, and the second flange support portion is close to the PIN foot fixing portion.

[0011] Further, a first convex portion close to the first flange support portion is provided on the outer wall surface of the winding cylinder, and a wire routing groove and / or a second convex portion for guiding the enameled wire to route to the PIN foot fixing portion are provided on the second flange support portion.

[0012] Further, each of the two units of the PIN foot is respectively connected with a flexible wire, and the PIN foot fixing portion is provided with two flexible wire positioning grooves corresponding to the two flexible wires one by one; or, each of the two units of the PIN foot respectively extends a pin, and the PIN foot fixing portion is provided with two pin positioning grooves corresponding to the two pins one by one.

[0013] Further, it further includes a housing which houses the magnet, the PIN foot, the capacitor and the coil bobbin therein.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Since the two capacitor support portions corresponding to the capacitor are respectively connected to the rest of their respective branches through narrow strips, or one of the two capacitor support portions corresponding to the capacitor is connected to the rest of its respective branch through a narrow strip, the present invention can utilize the easily deformable characteristic of the narrow strip to release the connection stress of the capacitor, thereby providing another way for the capacitor to release the connection stress, which can be used to replace the connection stress release method of suspending the portion where the capacitor is located in the prior art, and thus the problems existing in the capacitor stress release method adopted in the prior art can be avoided.

[0016] 2. Each of the capacitor support portions abuts against the coil bobbin, solving the problems of inconvenient welding and deformation of the welding due to force in the prior art where the portion where the capacitor is located is suspended.

[0017] 3. Each unit of the PIN foot is respectively inserted and cooperated with the jack of the coil bobbin through a pin, making the installation and disassembly of the PIN foot very convenient.

[0018] 4. The coil skeleton is provided with a plurality of connecting material cutting-out giving way structures corresponding to the plurality of connecting material parts of the PIN pin one by one, so that the present invention can utilize the connecting material cutting-out giving way structures to provide the space required for cutting out each connecting material part on the PIN pin. Therefore, when the PIN pin is fixed, it can be fixed on the coil skeleton first, and then its connecting material part can be cut off, thereby solving the problem of easy loss of parts and time-consuming and labor-intensive assembly caused by the prior art of first cutting off the connecting material part of the PIN pin and then fixing it.

[0019] 5. One of the continuous material cutting and making way structures is a making way notch located at the edge of the coil frame, and the other continuous material cutting and making way structures are making way through holes penetrating the coil frame, so that the structure of the coil frame is simpler and easier to injection mold.

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the low-frequency antenna for automobiles of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of an exploded view of the automotive low-frequency antenna of the present invention in Example 1 (magnetic steel and housing are not shown);

[0022] Figure 2 is a top view of the PIN pin of the present invention in the first embodiment;

[0023] Figure 3 is a front view of the PIN pin of the present invention in the first embodiment;

[0024] Figure 4 is a top view of the coil skeleton of the present invention in Example 1;

[0025] Figure 5 1 is a schematic diagram of the three-dimensional structure of the coil skeleton of the present invention in the first embodiment;

[0026] Figure 6 This is the main view of the PIN pin of the present invention after being installed on the coil frame in the first embodiment. Figure 1 (Before the material is cut off);

[0027] Figure 7 This is the main view of the PIN pin of the present invention after being installed on the coil frame in the first embodiment. Figure 2 (After the connecting part is cut off);

[0028] Figure 8 Embodiment 1 Figure 7 AA section view;

[0029] Figure 9 This is a front view of the automotive low-frequency antenna of the present invention in Embodiment 1 (the housing is not shown);

[0030] Figure 10 Figure 1 is a three-dimensional structure diagram of the low-frequency antenna for automobiles according to the first embodiment of the present invention;

[0031] Figure 11 Figure 2 is an exploded view of the low-frequency antenna for automobiles according to the second embodiment of the present invention (the magnet and the housing are not shown);

[0032] Figure 12 Figure 3 is a top view of the PIN foot according to the second embodiment of the present invention;

[0033] Figure 13 Figure 4 is a front view of the PIN foot according to the second embodiment of the present invention;

[0034] Figure 14 Figure 5 is a top view of the coil skeleton according to the second embodiment of the present invention;

[0035] Figure 15 Figure 6 is a bottom view of the coil skeleton according to the second embodiment of the present invention;

[0036] Figure 16 Figure 7 is a three-dimensional structure diagram of the coil skeleton according to the second embodiment of the present invention;

[0037] Figure 17 Figure 8 is a front view of the PIN foot installed on the coil skeleton according to the second embodiment of the present invention Figure 1 (before the connecting part is cut);

[0038] Figure 18 Figure 9 is a front view of the PIN foot installed on the coil skeleton according to the second embodiment of the present invention Figure 2 (after the connecting part is cut);

[0039] Figure 19 Figure 10 is a three-dimensional structure diagram of the low-frequency antenna for automobiles according to the second embodiment of the present invention. Detailed implementation manners

[0040] For the embodiments, please refer to Figures 1 - 10As shown, an automotive low-frequency antenna of the present invention includes a ferrite magnet 7, a PIN pin 4, a capacitor 5, and a coil bobbin 3 wound with an enameled wire 8. The magnet 7 and the PIN pin 4 are respectively installed on the coil bobbin 3, and the PIN pin 4 includes two units that are respectively electrically connected to the two ends of the enameled wire 8. At least one unit includes at least two branches, and the at least two branches are connected in series through the capacitor 5. Each branch has a capacitor support portion for electrically connecting to the capacitor 5; the two capacitor support portions corresponding to the capacitor are respectively connected to the rest of their respective branches through narrow strips, or one of the two capacitor support portions corresponding to the capacitor is connected to the rest of its respective branch through a narrow strip, so as to release the connection stress of the capacitor 5 through the narrow strip. The width of the narrow strip is smaller than the widths of the capacitor support portion and the rest of its respective branch. Each capacitor support portion abuts against the coil bobbin. The capacitor 5 is specifically welded to the corresponding capacitor support portion by welding, and the connection stress is the welding stress of the capacitor.

[0041] In this embodiment, the number of branches is two. For the convenience of distinction, the branches are respectively named the first branch 41 and the second branch 42. The capacitor support portion 411 of the first branch 41 and the capacitor support portion 421 of the second branch 42 are electrically connected to the capacitor 5, and the capacitor support portion 411 of the first branch is connected to the rest of the first branch 41 through a narrow strip 412. One unit of the PIN pin 4 includes the first branch 41 and the second branch 42, and the other unit includes a third branch 43. The two ends of the enameled wire 8 are specifically electrically connected to the rest of the first branch 41 and the third branch 43 respectively, and the electrical connection method is that the wire ends of the enameled wire are wound and fixed, but it is not limited thereto.

[0042] In this embodiment, each unit of the PIN pin 4 extends downward with a plurality of pins 45, and a plurality of jacks 24 are provided on the coil bobbin 3. The pins 45 are in one-to-one plug-in fit with the jacks 24. Specifically, the first branch 41, the second branch 42, and the third branch 43 of the PIN pin respectively extend downward with the plurality of pins 45, and at least two barbs 451 are respectively provided on the opposite sides of at least one pin of the first branch 41, the second branch 42, and the third branch 43, so that the pin and the corresponding jack are in interference fit through the barbs 451. The capacitor support portion 411 connected to the narrow strip 412 is not provided with a pin, so that the periphery of the capacitor support portion 411 is in a relatively free state, and the welding stress of the capacitor can be released by itself and the connected narrow strip 412.

[0043] In this embodiment, before the PIN pin 4 is fixed to the coil frame 3, the various parts of the PIN pin are connected together through a plurality of connecting parts. Specifically, a connecting part 44 is connected between the first branch 41 and the second branch 42, between the first branch 41 and the third branch 43, and between the second branch 42 and the third branch 43, and the connecting part between the first branch 41 and the second branch 42 is located between the capacitor supporting part 411 of the first branch and the capacitor supporting part 421 of the second branch. The coil frame 3 is provided with a plurality of connecting material cutting and giving way structures corresponding to the plurality of connecting parts 44.

[0044] In this embodiment, one of the continuous material cutting and making way structures is a making way notch 22 located at the edge of the coil frame, and the other two continuous material cutting and making way structures are respectively making way through holes 21 penetrating the coil frame.

[0045] In this embodiment, the coil skeleton 4 includes an enameled wire winding portion 1 and a PIN pin fixing portion 2, and the PIN pin fixing portion 2 is arranged at one end of the enameled wire winding portion 1; the magnetic steel 7 is sleeved on the enameled wire winding portion 1, and the magnetic steel 7 and the enameled wire winding portion 1 are interference fit. The PIN pin 4 is installed on the PIN pin fixing portion 2, and the PIN pin fixing portion 2 is provided with the connection cutting and giving way structure (i.e., the giving way notch 22 and the giving way through hole 21). The PIN pin fixing portion 2 is also provided with a PIN pin installation groove 23, and the plurality of jacks 24 and the giving way through hole 21 are arranged at the bottom of the installation groove 23, and the giving way notch 22 leads to the installation groove 23.

[0046] In this embodiment, the enameled wire winding portion 1 includes a hollow winding tube 11, a first flange support portion 12 arranged at one end of the winding tube 11, and a second flange support portion 13 arranged at the other end of the winding tube 11. The first flange support portion 12 is far away from the PIN foot fixing portion 2, and the second flange support portion 13 is close to the PIN foot fixing portion 2.

[0047] In this embodiment, the outer wall surface of the winding tube 11 is provided with a first protrusion 111 close to the first flange support portion 12, and the first protrusion 111 is a protrusion column structure, but is not limited thereto. The second flange support portion 13 is provided with a routing groove 131 and a second protrusion 132 for guiding the enameled wire to the PIN foot fixing portion 2, wherein the routing groove 131 is located on the top surface of the second flange support portion 13, and the second protrusion 132 is located on the side surface of the second flange support portion 13, as shown in FIG. Figure 5 As shown. Figure 9As shown, after the enameled wire 8 is wound around the winding cylinder 11, one end of the enameled wire 8 near the first flange support portion 12 extends in the direction of the second flange support portion 13 after bypassing the first convex portion 111, and walks along the second convex portion 132 to the PIN foot fixing portion 2 until it is electrically connected to the rest of the first branch of the PIN foot; the other end of the enameled wire 8 near the second flange support portion 13 walks along the wire groove 131 to the PIN foot fixing portion 2 until it is electrically connected to the third branch of the PIN foot.

[0048] In this embodiment, each of the two units of the PIN foot 4 is connected with a flexible wire 6. Specifically, the rest of the second branch 42 and the third branch 43 of the PIN foot are respectively connected with a flexible wire 6. The PIN foot fixing portion 2 is provided with two flexible wire positioning grooves 25 for guiding and positioning the two flexible wires 6 connected to the PIN foot 4. The two flexible wires 6 are respectively used for connecting with external devices.

[0049] In this embodiment, the present invention further includes a housing 9 which is in a long strip shape and has an open end at one end. The housing 9 encloses the magnet 7, the PIN foot 4 and the coil skeleton 3 therein.

[0050] An automotive low-frequency antenna of the present invention is a door antenna for sensing a key so as to allow the door to be opened, and is usually arranged at positions such as a door handle (left front door or right front door), a rear rod or a front rod.

[0051] When assembling the PIN foot 4, after aligning the pins 45 of the PIN foot 4 with the corresponding jacks 24, the PIN foot 4 is placed into the installation groove 23 of the PIN foot fixing portion 2, and the pins 45 of the PIN foot 4 are respectively inserted into the corresponding jacks 24. At this time, the connecting portions 44 between the first branch 41 and the second branch 42 of the PIN foot 4 and the connecting portions 44 between the second branch 42 and the third branch 43 respectively enter the ranges of the two relief through holes 21 of the PIN foot fixing portion 2, and the connecting portion 44 between the first branch 41 and the third branch 43 enters the range of the relief notch 22 of the PIN foot fixing portion 2, as Figure 6 shown. Then, using the relief spaces provided by the two relief through holes 21 and the relief notch 22, each connecting portion 44 is cut off, as Figure 7 shown; a chip capacitor 5 is soldered between the capacitor support portion 411 of the first branch 41 and the capacitor support portion 421 of the second branch 42. The two ends of the enameled wire 8 on the coil skeleton 3 are respectively electrically connected to the rest of the first branch 41 and the third branch 43 of the PIN foot 4. The two flexible wires 6 are respectively arranged at the two flexible wire positioning grooves 25 of the PIN foot fixing portion 2, and one ends of the two flexible wires 6 are respectively electrically connected to the second branch 42 and the third branch 43 of the PIN foot 4, as Figure 9 shown. Finally, the housing 9 is put on, and only the other ends of the two flexible wires 6 are exposed, as Figure 10shown.

[0052] The present invention discloses a low-frequency automotive antenna, which can utilize the characteristic of easy deformation of a narrow strip to release the welding stress of a capacitor, thereby providing another method for releasing the welding stress of a capacitor, and can be used to replace the welding stress release method of suspending the capacitor in the prior art, thereby avoiding the problems existing in the capacitor welding stress release method adopted in the prior art. At the same time, the present invention places each capacitor support part on the coil frame, respectively, solving the problems of inconvenient welding and welding stress deformation existing in the prior art of suspending the capacitor in the air.

[0053] The automotive low-frequency antenna of the present invention can utilize the connecting material cutting-off giving way structure to provide the space required for cutting off each connecting material portion on the PIN pin. Therefore, when the PIN pin is fixed, it can be first fixed on the coil frame and then its connecting material portion can be cut off, thereby solving the problem of easy loss of parts and time-consuming and labor-intensive assembly caused by first cutting off the connecting material portion of the PIN pin and then fixing it in the prior art.

[0054] Embodiment 2

[0055] See also Figures 11 - 19 As shown, a low-frequency antenna for automobiles of the present invention is different from the above-mentioned embodiment 1 in that: two units of the PIN pin 4 are respectively extended with a pin 46, and the two pins 46 are used to connect with external devices. Specifically, the remaining part of the second branch 42 and the third branch 43 are respectively extended with a pin 46. The PIN pin fixing part 2 is provided with two pin positioning grooves 26 corresponding to the two pins 46, and the PIN pin fixing part 2 is roughly L-shaped.

[0056] In this embodiment, the capacitor supporting portion 411 of the first branch 41 is also connected to the rest of the first branch 41 through a narrow strip 412 .

[0057] In this embodiment, the PIN pin fixing portion 2 is also provided with two clearance through holes 21 and one clearance notch 22 .

[0058] In this embodiment, the PIN pin fixing portion 2 is also provided with a PIN pin installation groove 23, and the bottom of the installation groove 23 is provided with a plurality of sockets 24 corresponding one-to-one to the plurality of pins on the PIN pin; the clearance through hole 21 is located at the bottom of the installation groove 23, and the clearance notch 22 leads to the installation groove 23.

[0059] In this embodiment, the enameled wire winding portion 1 also includes a hollow winding tube 11, a first flange support portion 12 arranged at one end of the winding tube 11, and a second flange support portion 13 arranged at the other end of the winding tube 11. The first flange support portion 12 is far away from the PIN foot fixing portion 2, and the second flange support portion 13 is close to the PIN foot fixing portion 2.

[0060] In this embodiment, a first convex portion 111 is also provided on the outer wall surface of the winding cylinder 11 near the first flange support portion 12. The second flange support portion 13 is provided with a wire routing groove 131 for guiding the enameled wire to the PIN foot fixing portion 2 and a second convex portion 132. Among them, the wire routing groove 131 is located at the bottom surface of the second flange support portion 13, as Figure 15 shown. The second convex portion 132 is located on the side surface of the second flange support portion 13, as Figure 16 shown.

[0061] In this embodiment, as Figure 12 , Figure 13 shown, the first branch 41, the second branch 42 and the third branch 43 also respectively extend downward by a plurality of pins 45 for plugging and mating with the jacks 24. At least one side surface of the pins 45 of the first branch 41, the second branch 42 and the third branch 43 is respectively provided with a barb structure 451, so that after the pin 45 is inserted into the corresponding jack 24, an interference fit with the jack 24 can be achieved. The capacitor support portion 411 connected with the narrow strip 412 is not provided with pins, so that the periphery of the capacitor support portion 411 is in a relatively free state, and the welding stress of the capacitor can be released by itself and the connected narrow strip 412.

[0062] In this embodiment, the present invention also includes a housing 9. The housing 9 is in a long strip shape and has an open bottom end. Installation lugs 91 with holes are respectively provided at both ends for installation and fixation. A connector 92 is provided on one side thereof. The housing 9 encloses the magnet 7, the PIN foot 4 and the coil skeleton 3 therein, and the two pins 26 of the PIN foot 4 are fitted in the connector 92.

[0063] An in-vehicle antenna of the present invention is an in-vehicle antenna for sensing that the key is inside the vehicle and allowing the vehicle to be started. It is usually arranged on the instrument panel, the roof lining, the rear seat or the inner side of the door, etc.

[0064] When assembling the PIN foot 4, after aligning each pin 45 of the PIN foot 4 with the corresponding jack 24, the PIN foot 4 is placed in the installation groove 23 of the PIN foot fixing portion 2, and each pin 45 of the PIN foot 4 is respectively inserted into the corresponding jack 24. At this time, the connecting portions 44 between the first branch 41 and the second branch 42 of the PIN foot 4 and the connecting portions 44 between the second branch 42 and the third branch 43 respectively enter the ranges of the two relief through holes 21 of the PIN foot fixing portion 2, and the connecting portion 44 between the first branch 41 and the third branch 43 enters the range of the relief notch 22 of the PIN foot fixing portion 2, as Figure 17 shown. Then, by using the relief spaces provided by the two relief through holes 21 and the relief notch 22, each connecting portion 44 is cut off, and chip capacitors 5 are soldered to the capacitor support portion 411 of the first branch 41 and the capacitor support portion 412 of the second branch 42, asFigure 18 As shown, the two ends of the enameled wire (not shown in the figure) on the coil bobbin 3 are electrically connected to the rest of the first branch 41 and the third branch 43 of the PIN foot 4 respectively. Finally, put on the outer shell 9, as Figure 19 shown.

[0065] The above embodiments are only used to further illustrate an automotive low-frequency antenna of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention all fall within the protection scope of the technical solution of the present invention.

Claims

1. An automotive low-frequency antenna, comprising a magnet, PIN pins, a capacitor, and a coil bobbin wound with enameled wire. The magnet and the PIN pins are respectively fixed to the coil bobbin, and the PIN pins include two units that are electrically connected to the two ends of the enameled wire one by one. At least one unit includes at least two branches, and the at least two branches are connected in series through a capacitor. Each branch has a capacitor support portion for electrically connecting to the capacitor; characterized in that: The two capacitor support parts corresponding to the capacitor are respectively connected to the rest of the branch where they are located through a narrow strip, or one of the two capacitor support parts corresponding to the capacitor is connected to the rest of the branch where it is located through a narrow strip, so as to release the welding stress of the capacitor through the narrow strip; the width of the narrow strip is smaller than the width of the capacitor support part and the rest of the branch where it is located; each capacitor support part rests on the coil frame; each unit of the PIN pin extends downward with a plurality of pins, and the coil frame is provided with a plurality of sockets, and the pins are plugged into and matched with the sockets one by one; the capacitor support part connected with the narrow strip is not provided with pins.

2. The automotive low-frequency antenna according to claim 1, characterized in that: At least two opposite side surfaces of a plug pin of each unit are respectively provided with barb structures, and the plug pin is interference-fitted with the corresponding plug hole through the barb structures.

3. The automotive low-frequency antenna according to claim 1, characterized in that: Before the PIN pin is fixed to the coil frame, the various parts of the PIN pin are connected together through a plurality of connecting parts, and the coil frame is provided with a plurality of connecting material cutting and giving way structures corresponding to the plurality of connecting material parts one by one.

4. The automotive low-frequency antenna according to claim 3, characterized in that: One of the continuous material cutting and making way structures is a making way notch located at the edge of the coil frame, and the other continuous material cutting and making way structures are making way through holes penetrating the coil frame.

5. The automotive low-frequency antenna according to claim 3, wherein: The coil frame includes an enameled wire winding part and a PIN pin fixing part, and the PIN pin fixing part is arranged at one end of the enameled wire winding part; the magnetic steel sleeve is mounted on the enameled wire winding part, and the PIN pin is installed on the PIN pin fixing part, and the PIN pin fixing part is provided with the connection cutting and giving way structure.

6. The automotive low-frequency antenna according to claim 5, wherein: The enameled wire winding portion includes a hollow winding cylinder, a first flange supporting portion arranged at one end of the winding cylinder and a second flange supporting portion arranged at the other end of the winding cylinder, the first flange supporting portion is far away from the PIN foot fixing portion, and the second flange supporting portion is close to the PIN foot fixing portion.

7. The automotive low-frequency antenna according to claim 6, characterized in that: The outer wall surface of the winding cylinder is provided with a first convex portion close to the first flange supporting portion, and the second flange supporting portion is provided with a wiring groove and / or a second convex portion for guiding the enameled wire to the PIN foot fixing portion.

8. The automotive low-frequency antenna according to claim 5, wherein: The two units of the PIN pin are respectively connected to a soft wire, and the PIN pin fixing part is provided with two soft wire positioning grooves corresponding to the two soft wires one by one; or, the two units of the PIN pin are respectively extended with a pin, and the PIN pin fixing part is provided with two pin positioning grooves corresponding to the two pins one by one.

9. The automotive low-frequency antenna according to claim 1, wherein: The invention also includes a shell, which contains the magnetic steel, PIN pins, capacitors and coil skeleton. in 。

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