CN212277391U - Automobile low-frequency antenna - Google Patents

Abstract

The utility model discloses an automobile low-frequency antenna, which comprises magnetic steel, a PIN foot, an electric capacity and a coil framework wound with an enameled wire, wherein the magnetic steel and the PIN foot are respectively fixed on the coil framework, the PIN foot comprises two units which are electrically connected with two ends of the enameled wire one by one, at least one unit comprises at least two branch parts, the at least two branch parts are connected in series through the electric capacity, and each branch part is respectively provided with an electric capacity supporting part which is electrically connected with the electric capacity; the two capacitor supporting parts corresponding to the capacitor are respectively connected with the rest part of the branch part where the capacitor is located through the narrow strip, or one of the two capacitor supporting parts corresponding to the capacitor is connected with the rest part of the branch part where the capacitor is located through the narrow strip, so that the connection stress of the capacitor is released through the narrow strip. The utility model discloses can utilize the easy characteristic of deformation of narrow strip to release the connection stress of electric capacity, can be used for replacing prior art with the unsettled connection stress release mode in electric capacity place position to can avoid the electric capacity welding stress release mode's that prior art adopted problem that exists.

Description

Automobile low-frequency antenna

Technical Field

The utility model relates to an antenna technology field especially relates to a car low frequency antenna.

Background

Automobile low frequency antenna generally includes magnet steel, PIN foot and twines the coil skeleton that has the enameled wire, and magnet steel and PIN foot are fixed in the coil skeleton respectively, and the PIN foot has two parts of being connected with the both ends one-to-one of enameled wire, in order to constitute LC tank circuit, produces corresponding frequency, and at least partly branch portion of PIN foot falls into two branches to series capacitance between these two branches, electric capacity generally is connected with two branches through the welded mode, and this kind of mode can produce welding stress. Therefore, stress is released by a suspension mode of a position where the capacitor is located in the prior art, however, when the capacitor is welded by the mode, a supporting part needs to be arranged below the welding position of the capacitor in a cushioning mode, otherwise, the capacitor is inconvenient to weld, and the welding part of the capacitor is easy to deform downwards due to welding stress.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem that prior art exists, a car low frequency antenna is provided.

The utility model provides a technical scheme that its technical problem adopted is: an automobile low-frequency antenna comprises magnetic steel, a PIN (personal identification number) PIN, a capacitor and a coil skeleton wound with an enameled wire, wherein the magnetic steel and the PIN PIN are respectively fixed on the coil skeleton; the two capacitor supporting parts corresponding to the capacitor are respectively connected with the rest part of the branch part where the capacitor is located through the narrow strip, or one of the two capacitor supporting parts corresponding to the capacitor is connected with the rest part of the branch part where the capacitor is located through the narrow strip, so that the connection stress of the capacitor is released through the narrow strip.

Furthermore, each capacitor support part leans against the coil framework respectively.

Furthermore, each unit of the PIN PIN extends downwards to form a plurality of PIN feet, a plurality of jacks are arranged on the coil framework, and the PIN feet are in one-to-one insertion fit with the jacks; at least one of the two opposite side surfaces of the pin of each unit is respectively provided with a barb structure, and the pin is in interference fit with the corresponding jack through the barb structure.

Further, the PIN foot is fixed in before the coil skeleton, the PIN foot links integratively through a plurality of material portions even, the coil skeleton be equipped with a plurality of material excision of linking of a plurality of material portions one-to-one gives the place to the structure.

Furthermore, one of them material excision is stepped down the structure and is located coil skeleton border position's breach of stepping down, and remaining two material excision are stepped down the structure and are respectively for running through coil skeleton's the through-hole of stepping down.

Further, the coil framework comprises an enameled wire winding part and a PIN fixing part, and the PIN fixing part is arranged at one end of the enameled wire winding part; the magnetic steel is sleeved on the enameled wire winding part, the PIN is installed on the PIN fixing part, and the PIN fixing part is provided with the connection cutting abdicating structure.

Further, enameled wire winding portion includes that the first flange that hollow winding section of thick bamboo, winding section of thick bamboo one end set up supports the portion and the second flange that the winding section of thick bamboo other end set up supports the portion, and first flange supports the portion and keeps away from PIN foot fixed part, and second flange supports the portion and is close to PIN foot fixed part.

Furthermore, the outer wall surface of the winding cylinder is provided with a first convex part close to the first flange supporting part, and the second flange supporting part is provided with a wiring groove and/or a second convex part for guiding the enameled wire to be wired to the PIN fixing part.

Furthermore, two units of the PIN are respectively connected with a flexible conductor, and the fixing part of the PIN is provided with two flexible conductor positioning grooves which are in one-to-one correspondence with the two flexible conductors; or, a PIN extends from each of the two units of the PIN, and the PIN fixing part is provided with two PIN positioning grooves corresponding to the two PINs one to one.

Furthermore, the magnetic steel, the PIN foot, the capacitor and the coil framework are contained in the shell.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. because two electric capacity supporting parts that electric capacity corresponds are connected through the fillet rather than the rest of place branch portion respectively, perhaps, one in two electric capacity supporting parts that electric capacity corresponds is connected through the fillet rather than the rest of place branch portion, makes the utility model discloses can utilize the easy characteristic of deformation of fillet to release the connecting stress of electric capacity to another kind of mode of electric capacity release connecting stress is provided, can be used for replacing the unsettled connecting stress release mode in current technique with electric capacity place position, thereby can avoid the problem that electric capacity stress release mode that prior art adopted exists.

2. Each capacitor supporting part leans on the coil framework respectively, and the problems of inconvenient welding and welding stress deformation existing in a suspension mode at the position of a capacitor in the prior art are solved.

3. Each unit of PIN foot is respectively through participating in the cooperation of pegging graft with the jack of coil skeleton, makes the installation and removal of PIN foot very convenient.

4. Coil skeleton is equipped with a plurality of material excision of linking material portion one-to-one with the PIN foot and lets the bit architecture, makes the utility model discloses can utilize link material excision let the bit architecture provide each on the PIN foot link material portion excision required space, therefore when the PIN foot is fixed, can fix it on coil skeleton earlier, cut off its even material portion again to solve prior art and to cut out earlier even material portion and fix the spare part that causes again and easily lose and assemble the problem of wasting time and energy to the PIN foot.

5. One of them material excision is stepped down the structure and is located the breach of stepping down of coil skeleton border position, all the other material excision is stepped down the structure and is for running through coil skeleton's the through-hole of stepping down makes coil skeleton's structure simpler, changes in injection moulding.

The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiments.

Drawings

Fig. 1 is an exploded schematic view of an automotive low-frequency antenna according to an embodiment of the present invention (magnetic steel and a housing are not shown);

fig. 2 is a top view of a PIN foot according to the first embodiment of the present invention;

fig. 3 is a front view of the PIN foot of the first embodiment of the present invention;

fig. 4 is a plan view of a bobbin according to the first embodiment of the present invention;

fig. 5 is a schematic perspective view of a coil bobbin according to the first embodiment of the present invention;

fig. 6 is a first front view (before the connecting material is cut away) of the first embodiment of the present invention, in which the PIN is mounted on the coil bobbin;

fig. 7 is a second front view (after the connecting material is cut away) of the first embodiment of the present invention, after the PIN is mounted on the coil frame;

FIG. 8 is a sectional view A-A of FIG. 7 according to an embodiment;

fig. 9 is a front view of the low frequency antenna of the present invention (the housing is not shown);

fig. 10 is a schematic perspective view of an automotive low-frequency antenna according to an embodiment of the present invention;

fig. 11 is an exploded schematic view of the low-frequency antenna of the second embodiment of the present invention (magnetic steel and housing are not shown);

fig. 12 is a plan view of a PIN of the second embodiment of the present invention;

fig. 13 is a front view of a PIN foot according to the second embodiment of the present invention;

fig. 14 is a plan view of a bobbin according to the second embodiment of the present invention;

fig. 15 is a bottom view of the coil bobbin according to the second embodiment of the present invention;

fig. 16 is a schematic perspective view of a coil bobbin according to the second embodiment of the present invention;

fig. 17 is a first front view (before the connecting material is cut away) of the second embodiment of the present invention, after the PIN is mounted on the bobbin;

fig. 18 is a second front view (after the connecting material is cut away) of the second embodiment of the present invention, after the PIN is mounted on the bobbin;

fig. 19 is a schematic perspective view of a low-frequency antenna of the second embodiment of the present invention.

Detailed Description

In an embodiment, please refer to fig. 1-10, the present invention relates to an automotive low frequency antenna, which includes a ferrite magnetic steel 7, a PIN 4, a capacitor 5 and a coil frame 3 wound with an enameled wire 8, wherein the magnetic steel 7 and the PIN 4 are respectively mounted on the coil frame 4, the PIN 4 includes two units electrically connected with two ends of the enameled wire 8 one by one, at least one unit includes at least two branches connected in series by the capacitor 5, each branch has a capacitor support part for electrically connecting with the capacitor 5; the two capacitor supporting parts corresponding to the capacitor are respectively connected with the rest part of the branch part where the capacitor is located through the narrow strip, or one of the two capacitor supporting parts corresponding to the capacitor is connected with the rest part of the branch part where the capacitor is located through the narrow strip, so that the connection stress of the capacitor 5 is released through the narrow strip. The width of the narrow strip is smaller than the widths of the capacitor supporting part and the rest part of the branch part where the narrow strip is located. And each capacitor supporting part is respectively leaned against the coil framework. The capacitor 5 is welded with the corresponding capacitor supporting part in a welding mode, and the connection stress is the welding stress of the capacitor.

In this embodiment, the number of the branch portions is two, and for the convenience of distinction, the branch portions are named as a first branch portion 41 and a second branch portion 42, the capacitor support portion 411 of the first branch portion 41 and the capacitor support portion 421 of the second branch portion 42 are electrically connected with the capacitor 5, and the capacitor support portion 411 of the first branch portion is connected with the rest of the first branch portion 41 through the narrow strip 412. One unit of the PIN 4 includes the first branch portion 41 and the second branch portion 42, the other unit includes a third branch portion 43, two ends of the enameled wire 8 are electrically connected to the rest of the first branch portion 41 and the third branch portion 43, respectively, and the electrical connection mode is that the wire end of the enameled wire is wound and fixed, but is not limited thereto.

In this embodiment, each unit of the PIN 4 has a plurality of PINs 45 extending downward, the coil bobbin 3 is provided with a plurality of insertion holes 24, and the PINs 45 are inserted into the insertion holes 24 one by one. Specifically, first branch portion 41, second branch portion 42 and the third branch portion 43 of PIN foot downwardly extending respectively have a plurality of participate in 45, and the relative both sides face of participating in of at least one of first branch portion 41, second branch portion 42 and third branch portion 43 is equipped with two barb structures 451 respectively, makes to participate in with corresponding jack interference fit through this barb structure 451. The capacitor support 411 connected with the narrow strip 412 is not provided with pins, so that the periphery of the capacitor support 411 is in a relatively free state, and the welding stress of the capacitor can be released by the capacitor support and the narrow strip 412 connected with the capacitor support.

In this embodiment, before the PIN 4 is fixed to the bobbin 3, the parts of the PIN are connected together by a plurality of connecting portions, specifically, the connecting portions 44 are connected between the first branch portion 41 and the second branch portion 42, between the first branch portion 41 and the third branch portion 43, and between the second branch portion 42 and the third branch portion 43, respectively, and the connecting portions between the first branch portion 41 and the second branch portion 42 are located between the capacitor support portion 411 of the first branch portion and the capacitor support portion 421 of the second branch portion. The coil framework 3 is provided with a plurality of continuous material cutting yielding structures which correspond to the plurality of continuous material parts 44 one by one.

In this embodiment, one of the two material cutting yielding structures is a yielding notch 22 located at the edge of the coil bobbin, and the other two material cutting yielding structures are yielding through holes 21 penetrating through the coil bobbin.

In this embodiment, the coil bobbin 4 includes an enameled wire winding portion 1 and a PIN fixing portion 2, and the PIN fixing portion 2 is disposed at one end of the enameled wire winding portion 1; the magnetic steel 7 is sleeved on the enameled wire winding part 1, and the magnetic steel 7 is in interference fit with the enameled wire winding part 1. PIN foot 4 is adorned in PIN foot fixed part 2, and PIN foot fixed part 2 is equipped with connect the excision and give way the structure (promptly give way breach 22 and give way through-hole 21). PIN foot fixed part 2 still is equipped with the mounting groove 23 of PIN foot, a plurality of jacks 24 with let a through-hole 21 locate the tank bottom of this mounting groove 23 promptly, let a breach 22 access to mounting groove 23.

In this embodiment, the enameled wire winding portion 1 includes a hollow winding cylinder 11, a first flange support portion 12 provided at one end of the winding cylinder 11, and a second flange support portion 13 provided at the other end of the winding cylinder 11, where the first flange support portion 12 is far away from the PIN fixing portion 2, and the second flange support portion 13 is close to the PIN fixing portion 2.

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 12, and the first protrusion 111 has a convex column structure, but is not limited thereto. The second flange supporting portion 13 is provided with a wire routing groove 131 and a second protrusion 132 for guiding the enameled wire to be routed to the PIN fixing portion 2, wherein the wire routing groove 131 is located on the top surface of the second flange supporting portion 13, and the second protrusion 132 is located on the side surface of the second flange supporting portion 13, as shown in fig. 5. As shown in fig. 9, after the enameled wire 8 is wound on the winding cylinder 11, one end of the enameled wire close to the first flange supporting part 12 extends around the first convex part 111 and then towards the second flange supporting part 13, and goes to the PIN fixing part 2 along the second convex part 132 until being electrically connected with the rest of the first branch part of the PIN; the other end of the enameled wire 8 close to the second flange supporting part 13 is routed to the PIN fixing part 2 along the wiring groove 131 until being electrically connected with the third branch part of the PIN.

In this embodiment, two units of PIN foot 4 are connected with a flexible conductor 6 respectively, specifically, the rest of second branch portion 42 and third branch portion 43 of PIN foot are connected with a flexible conductor 6 respectively, PIN foot fixed part 2 is equipped with two flexible conductor constant head tanks 25 for supply with two flexible conductors 6 that PIN foot 4 is connected walk the line and fix a position. The two flexible wires 6 are respectively used for connecting with external devices.

In this embodiment, the utility model discloses still include shell 9, this shell 9 is rectangular form, and its one end opening, and this shell 9 will magnet steel 7, PIN foot 4 and coil skeleton 3 contain wherein.

The utility model discloses a car low frequency antenna, it is the door antenna for the response key, thereby the door is opened in the permission, and it sets up generally in positions such as door handle (left qianmen or right qianmen), back pole or front mast.

When the PIN 4 is assembled, after the PINs 45 of the PIN 4 are aligned with the corresponding insertion holes 24, the PIN 4 is placed in the mounting groove 23 of the PIN fixing portion 2, and the PINs 45 of the PIN 4 are inserted into the corresponding insertion holes 24, at this time, the connecting material portion 44 between the first branch portion 41 and the second branch portion 42, and the connecting material portion 44 between the second branch portion 42 and the third branch portion 43 of the PIN 4 enter the range of the two abdicating through holes 21 of the PIN fixing portion 2, respectively, and the connecting material portion 44 between the first branch portion 41 and the third branch portion 43 enters the range of the abdicating notch 22 of the PIN fixing portion 2, as shown in fig. 6. Then, using the yielding space provided by the two yielding through holes 21 and the yielding notches 22 to cut off each connecting material portion 44, as shown in fig. 7; the chip capacitor 5 is soldered between the capacitor support portion 411 of the first branch portion 41 and the capacitor support portion 421 of the second branch portion 42, two ends of the enameled wire 8 on the bobbin 3 are electrically connected to the rest of the first branch portion 41 of the PIN 4 and the third branch portion 43, the two flexible wires 6 are respectively disposed at the two flexible wire positioning grooves 25 of the PIN fixing portion 2, and one ends of the two flexible wires 6 are electrically connected to the second branch portion 42 and the third branch portion 43 of the PIN 4, as shown in fig. 9. Finally, the sheath 9 is pulled over so that only the other ends of the two flexible conductors 6 are exposed, as shown in fig. 10.

The utility model discloses a car low frequency antenna, its characteristic that can utilize the easy deformation of narrow strip releases the welding stress of electric capacity to another kind of mode of electric capacity release welding stress is provided, can be used for replacing the unsettled welding stress release mode in prior art with electric capacity place position, thereby can avoid the problem that the electric capacity welding stress release mode that prior art adopted exists. In order to this simultaneously, the utility model discloses lean on each electric capacity supporting part respectively on coil skeleton has solved the inconvenient welding that prior art exists the electric capacity place position unsettled and the problem that the welding atress warp.

The utility model discloses a car low frequency antenna, it can utilize even the material excision is stepped down the structure and is provided each even material portion excision required space on the PIN foot, therefore when the PIN foot is fixed, can fix it on coil skeleton earlier, cuts off its even material portion again to solve prior art and to cut out even material portion earlier and fix the spare part that causes again and easily lose and assemble the problem of wasting time and energy to the PIN foot.

Example two

Referring to fig. 11 to fig. 19, the present invention is a low frequency antenna for a vehicle, which is different from the first embodiment in that: two units of the PIN 4 are respectively extended with a PIN 46, and are connected with an external device by the two PINs 46. Specifically, a pin 46 extends from the remaining portion of the second branch portion 42 and the third branch portion 43. The PIN fixing portion 2 is provided with two PIN positioning grooves 26 corresponding to the two PINs 46 one by one, and the PIN fixing portion 2 is substantially L-shaped.

In this embodiment, the capacitor support 411 of the first branch portion 41 is also connected to the rest of the first branch portion 41 through the narrow strip 412.

In this embodiment, the PIN fixing portion 2 is also provided with two yielding through holes 21 and a yielding notch 22.

In this embodiment, the PIN fixing part 2 is also provided with an installation groove 23 for the PIN, and the bottom of the installation groove 23 is provided with a plurality of jacks 24 corresponding to a plurality of PINs on the PIN one by one; the yielding through hole 21 is located at the bottom of the mounting groove 23, and the yielding notch 22 is communicated with the mounting groove 23.

In this embodiment, the enameled wire winding portion 1 also includes a hollow winding cylinder 11, a first flange support portion 12 provided at one end of the winding cylinder 11, and a second flange support portion 13 provided at the other end of the winding cylinder 11, the first flange support portion 12 is far from the PIN fixing portion 2, and the second flange support portion 13 is close to the PIN fixing portion 2.

In this embodiment, the outer wall surface of the winding tube 11 is also provided with a first protrusion 111 close to the first flange support 12, and the second flange support 13 is provided with a wire routing groove 131 and a second protrusion 132 for guiding the enameled wire to the PIN fixing portion 2, wherein the wire routing groove 131 is located at the bottom surface of the second flange support 13, as shown in fig. 15, and the second protrusion 132 is located at the side surface of the second flange support 13, as shown in fig. 16.

In this embodiment, as shown in fig. 12 and 13, the first branch portion 41, the second branch portion 42 and the third branch portion 43 also respectively extend downward to form a plurality of pins 45 for being inserted into the insertion holes 24, and at least one of two opposite side surfaces of the pins 45 of the first branch portion 41, the second branch portion 42 and the third branch portion 43 is respectively provided with a barb structure 451, so that the pins 45 can be in interference fit with the insertion holes 24 after being inserted into the corresponding insertion holes 24. The capacitor support 411 connected with the narrow strip 412 is not provided with pins, so that the periphery of the capacitor support 411 is in a relatively free state, and the welding stress of the capacitor can be released by the capacitor support and the narrow strip 412 connected with the capacitor support.

In this embodiment, the utility model discloses still include shell 9 equally, this shell 9 is rectangular form, and its bottom opening, and its both ends are equipped with foraminiferous installation lug 91 respectively for the installation is fixed, and its one side is provided with connector 92, and this shell 9 will magnet steel 7, PIN foot 4 and coil skeleton 3 contain wherein, and two PINs 26 of PIN foot 4 cooperate in connector 92.

The utility model discloses a car low frequency antenna, it is antenna in the car for the response key is in the car and allows to start the car, and it sets up at panel board, roof, back seat or door inboard etc. usually.

When the PIN 4 is assembled, after the PINs 45 of the PIN 4 are aligned with the corresponding insertion holes 24, the PIN 4 is placed in the mounting groove 23 of the PIN fixing portion 2, and the PINs 45 of the PIN 4 are inserted into the corresponding insertion holes 24, at this time, the connecting material portion 44 between the first branch portion 41 and the second branch portion 42, and the connecting material portion 44 between the second branch portion 42 and the third branch portion 43 of the PIN 4 enter the range of the two abdicating through holes 21 of the PIN fixing portion 2, respectively, and the connecting material portion 44 between the first branch portion 41 and the third branch portion 43 enters the range of the abdicating notch 22 of the PIN fixing portion 2, as shown in fig. 17. Next, each connecting portion 44 is cut off by using the abdicating space provided by the abdicating through holes 21 and the abdicating notch 22, and the chip capacitors 5 are soldered on the capacitor supporting portion 411 of the first branch portion 41 and the capacitor supporting portion 412 of the second branch portion 42, as shown in fig. 18, two ends of the enameled wires (not shown in the figure) on the coil bobbin 3 are electrically connected to the rest of the first branch portion 41 and the third branch portion 43 of the PIN 4, respectively. Finally, the housing 9 is slipped on, as shown in fig. 19.

The above-mentioned embodiment is only used to further explain the utility model discloses a low frequency antenna for automobile, but the utility model discloses do not limit to the embodiment, all according to the utility model discloses a technical entity does any simple modification, equivalent change and modification to above embodiment, all fall into the technical scheme's of the utility model protection within range.

Claims (10)

1. The low-frequency antenna comprises magnetic steel, a PIN (personal identification number) PIN, a capacitor and a coil skeleton wound with an enameled wire, wherein the magnetic steel and the PIN PIN are respectively fixed on the coil skeleton; the method is characterized in that: the two capacitor supporting parts corresponding to the capacitor are respectively connected with the rest part of the branch part where the capacitor is located through the narrow strip, or one of the two capacitor supporting parts corresponding to the capacitor is connected with the rest part of the branch part where the capacitor is located through the narrow strip, so that the connection stress of the capacitor is released through the narrow strip.

2. The automotive low frequency antenna of claim 1, characterized in that: and each capacitor supporting part is respectively leaned against the coil framework.

3. The automotive low frequency antenna of claim 1, characterized in that: each unit of the PIN is respectively provided with a plurality of PINs extending downwards, the coil framework is provided with a plurality of jacks, and the PINs and the jacks are in one-to-one insertion fit; at least one of the two opposite side surfaces of the pin of each unit is respectively provided with a barb structure, and the pin is in interference fit with the corresponding jack through the barb structure.

4. The automotive low frequency antenna of claim 1, characterized in that: PIN foot is fixed in before the coil skeleton, each part of PIN foot is linked into an organic whole through a plurality of material portions of linking, the coil skeleton be equipped with a plurality of material excision of linking of a plurality of material portions one-to-one let the bit architecture.

5. The automotive low frequency antenna of claim 4, characterized in that: one of them material excision is stepped down the structure and is located the breach of stepping down of coil skeleton border position, and remaining material excision is stepped down the structure and is run through coil skeleton's through-hole of stepping down.

6. The automotive low frequency antenna of claim 4, characterized in that: the coil framework comprises an enameled wire winding part and a PIN fixing part, and the PIN fixing part is arranged at one end of the enameled wire winding part; the magnetic steel is sleeved on the enameled wire winding part, the PIN is installed on the PIN fixing part, and the PIN fixing part is provided with the connection cutting abdicating structure.

7. The automotive low frequency antenna of claim 6, characterized in that: enameled wire winding portion includes that the first flange that hollow winding section of thick bamboo, winding section of thick bamboo one end set up supports the portion and the second flange that the winding section of thick bamboo other end set up supports the portion, and first flange supports the portion and keeps away from PIN foot fixed part, and second flange supports the portion and is close to PIN foot fixed part.

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

9. The automotive low frequency antenna of claim 6, characterized in that: the two units of the PIN are respectively connected with a flexible conductor, and the fixing part of the PIN is provided with two flexible conductor positioning grooves which are in one-to-one correspondence with the two flexible conductors; or, a PIN extends from each of the two units of the PIN, and the PIN fixing part is provided with two PIN positioning grooves corresponding to the two PINs one to one.

10. The automotive low frequency antenna of claim 1, characterized in that: the magnetic steel, the PIN foot, the capacitor and the coil framework are contained in the shell.

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