Antenna device and method of manufacturing the same

Abstract

The application discloses an antenna device and a manufacturing method thereof. The antenna device comprises a winding frame, a coil, a magnetic core, a shell and a support. The winding frame comprises a base and a winding shaft. The base is provided with a wiring port and a pin. The winding shaft comprises an assembly part, a transition part and a winding part arranged along an axial direction. The assembly part is matched with the base. The coil is wound outside the winding part and connected with the pin. The magnetic core is arranged in a hollow space of the winding shaft. The shell is provided with a mounting space and a mounting port. The magnetic core and the winding shaft are inserted into the mounting space through the mounting port. The support is connected with the winding frame or integrally formed. The support comprises a first contact part and a second contact part protruding from an outer surface of the winding shaft. When the winding shaft is inserted into the mounting space, the first contact part and the second contact part are respectively in contact with or clearance fit with a top wall and a bottom wall in the mounting space. The winding shaft is in a suspended state in the mounting space, avoiding direct contact between the winding shaft and the shell and reducing direct impact of the shell on the winding shaft due to collision.

Description

Technical Field

[0001] The present invention relates to the technical field of communication equipment, and in particular to an antenna device and a manufacturing method thereof. Background Art

[0002] In recent years, smart key systems have become increasingly common in vehicles like cars and homes. These systems use electromagnetic waves to receive information such as wireless IDs and passwords. If the IDs and passwords are matched, the owner can lock and unlock the doors of their vehicle or home, or start or stop the engine, without using a mechanical key. These smart key systems utilize antenna devices such as coil antennas to receive information.

[0003] The main components of such antenna devices are a rod-shaped magnetic core, a frame that houses the rod-shaped core, and a coil formed by winding a conductive wire around the frame. However, because the rod-shaped magnetic core is made of a fragile material such as ferrite, it can be easily damaged by impacts such as being dropped while housed within the frame. Furthermore, an antenna device containing a damaged rod-shaped magnetic core decreases its inductance, causing a shift in the resonant frequency and making it impossible to communicate at the target frequency. Summary of the Invention

[0004] Based on this, the present invention aims to overcome the defects of the prior art and provide an antenna device and a manufacturing method thereof that prevents damage to the magnetic core.

[0005] The technical solution is as follows:

[0006] An antenna device, comprising:

[0007] A winding frame, comprising a base and a winding shaft, wherein the base is provided with a wiring port, wherein pins are provided in the wiring port, and the winding shaft is hollow and comprises an assembly portion, a transition portion, and a winding portion sequentially arranged along the axial direction, wherein the assembly portion cooperates with the base;

[0008] a coil, the coil being wound around the winding portion and connected to the pin;

[0009] a magnetic core, wherein the magnetic core is partially or entirely disposed in the hollow space of the winding shaft;

[0010] a housing, wherein the housing is provided with an installation space and an installation opening communicating with the installation space, and the magnetic core and the winding shaft are both inserted into the installation space through the installation opening; and

[0011] A support member is connected to or integrally formed with the winding frame, and the support member includes a first contact portion and a second contact portion protruding from the outer surface of the winding shaft. When the winding shaft extends into the installation space, the support member is located in the installation space, and the first contact portion and the second contact portion are in contact with or have a clearance fit with the top wall and bottom wall in the installation space, respectively.

[0012] In the above-mentioned antenna device, the magnetic core is partially or entirely disposed within the hollow space of the winding shaft, the coil is wound around the outside of the winding frame and connected to the pins on the base. The coil can be electrically connected to the external circuit via the pins, and the magnetic core and the winding frame are assembled to the housing by inserting the mounting space through the mounting opening. In theory, as long as the winding frame and the housing are accurately matched, the winding shaft will naturally be inside the housing after installation and will not contact the housing. However, due to errors in precision control and limitations in machining accuracy in mechanical aspects, the actual winding shaft does not fit tightly after being inserted into the housing. In addition, since the magnetic core is relatively long and has a certain weight, and the gap reserved between the winding shaft and the housing is very small, it is easy for the end of the winding portion away from the transition portion to contact the housing due to poor fit and gravity. In other words, this contact is a direct physical contact between the winding shaft and the housing, which affects the overall shockproof effect. Since the winding frame is connected or integrally formed with a support member, the support member is provided with a first contact portion and a second contact portion protruding from the outer surface of the winding shaft. When the magnetic core and the winding frame are inserted into the installation space, the first contact portion contacts or has a clearance fit with the top wall of the installation space, and the second contact portion contacts or has a clearance fit with the bottom wall of the installation space. In this way, the first contact portion and the second contact portion are equivalent to the positioning mechanism of the winding shaft, which can make the winding shaft suspended relative to the shell in the installation space, avoiding direct contact between the winding shaft and the shell, and reducing the direct impact of the shell on the winding shaft due to collision. It can be seen that the first contact portion and the second contact portion act as a buffer between the far end of the winding shaft and the shell, which can protect the winding shaft, make the shockproof effect of the antenna device better, and prevent the magnetic core of the antenna device from being damaged due to vibration.

[0013] In one embodiment, the support member includes a first split, a second split and a third split, the second split and the third split are respectively connected to the two ends of the first split, the winding shaft is located between the second split and the third split, the first contact portion is provided on the side of the first split away from the second split and the third split, and the end of the second split and / or the third split away from the first split is the second contact portion.

[0014] In one embodiment, one end of the second split body and the third split body away from the first split body is bent to form the second contact portion.

[0015] In one embodiment, the base includes a connecting portion, an inserting portion and a lead frame, the connecting portion is provided with the wiring port, the inserting portion is provided with a socket, one end of the winding shaft is inserted into the socket, and the lead frame is fixed in the connecting portion in an embedded manner. The lead frame includes the pin extending into the wiring port, an embedded portion embedded in the connecting portion, and a winding terminal extending from the connecting portion, wherein the coil is electrically connected to the winding terminal via the embedded portion and the pin.

[0016] In one embodiment, the embedded portion is formed with an exposed portion exposed to the outside, and the exposed portion is used to electrically connect to the capacitor and form a resonant circuit with the coil.

[0017] In one embodiment, there is a gap between the magnetic core and the bottom wall of the winding shaft, and a first shock-absorbing layer is provided in the gap.

[0018] In one embodiment, a groove is provided on the bottom wall of the winding shaft, and the first shock-absorbing layer is filled in the groove.

[0019] In one embodiment, a flow hole is provided on the bottom wall of one end of the winding shaft close to the base.

[0020] In one embodiment, a ventilation opening is provided at one end of the winding shaft close to the base.

[0021] In one embodiment, a second shock-absorbing layer is provided between the bottom surface of the winding shaft and the outer shell, and a gap exists between other surfaces of the winding shaft and the inner wall of the outer shell.

[0022] In one embodiment, the first shock-absorbing layer and the second shock-absorbing layer are solidified glue.

[0023] A method for manufacturing an antenna device as described in any one of the above items, comprising the following steps:

[0024] Connecting or integrally forming the support member on the winding frame;

[0025] Inserting the winding frame into the housing through the installation opening so that the magnetic core and the winding shaft are located in the installation space of the housing;

[0026] Filling the mounting opening with the glue, the glue flowing from the gap between the winding shaft and the housing to between the bottom surface of the winding shaft and the housing and solidifying to form the second shock-absorbing layer; at the same time, the glue enters the winding shaft and flows to the gap between the bottom wall of the winding shaft and the magnetic core and into the groove, solidifying to form the first shock-absorbing layer;

[0027] A first potting material and a second potting material are poured into the installation opening in order from inside to outside, and the solidification speed of the first potting material is faster than that of the second potting material.

[0028] In the manufacturing method of the antenna device described above, a support member is connected to or integrally formed on a winding frame. The support member includes a first contact portion and a second contact portion protruding from the outer surface of the winding shaft. When the winding shaft is placed in a housing, the first contact portion and the second contact portion can respectively contact or indirectly engage with the top and bottom walls of the housing. This allows the winding shaft to be suspended in the air. The first and second contact portions act as buffers between the winding shaft and the housing, protecting the winding shaft and improving the shockproofing effect of the antenna device. By inserting the winding shaft into the housing, filling glue between the bottom surface of the winding shaft and the housing to form a second shock-absorbing layer, and filling glue between the bottom wall of the winding shaft and the magnetic core and in the groove to form a first shock-absorbing layer, the winding shaft is bonded and fixed to the housing while avoiding excessive direct contact between the winding shaft and the housing. The magnetic core is bonded and fixed to the winding shaft while avoiding excessive hard contact between the magnetic core and the winding shaft. On the one hand, after the glue solidifies, it can dampen the vibration of the winding shaft and the magnetic core, protecting them and reducing the vibration amplitude of the winding shaft and the magnetic core. On the other hand, when subjected to a large external force, since the winding shaft is only in direct contact with the outer shell through the glue, and the magnetic core is also in direct contact with the winding shaft through the glue, the stress rebounded from the outer shell cannot be directly transmitted to the winding shaft and the magnetic core through other surfaces, which can protect the winding shaft and further prevent damage to the magnetic core inside the winding shaft due to vibration. This allows the antenna device to operate normally even in the presence of large vibrations, improves the stability of the antenna device, and increases the service life of the antenna device. At the same time, the first potting material and the second potting material are poured into the installation port in sequence. Since the first potting material solidifies faster, it can fix the assembly of the winding shaft and the outer shell, preventing the second potting material from entering the space where the winding shaft is located, ensuring that only the bottom surface of the winding shaft is in contact with the outer shell through the glue. The second potting material can then fill the remaining space, making the sealing and integrity of the antenna device better after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of the antenna device according to the first embodiment of the present invention;

[0030] Figure 2 for Figure 1 Exploded diagram of the structure of the antenna equipment;

[0031] Figure 3 for Figure 2 A magnified schematic diagram of the structure at the center circle C;

[0032] Figure 4 for Figure 1 Schematic diagram of the structure of the middle shell;

[0033] Figure 5 for Figure 1 Schematic diagram of the structure of the winding shaft and support parts;

[0034] Figure 6 for Figure 1 Cross-sectional view along line AA;

[0035] Figure 7 for Figure 6 A magnified schematic diagram of the structure at the center circle D;

[0036] Figure 8 for Figure 1 Cross-sectional view along the midline BB;

[0037] Figure 9 This is a schematic diagram of the assembled winding shaft, magnetic core, coil and support member according to the first embodiment of the present invention;

[0038] Figure 10 This is a structural schematic diagram of the winding frame, coil, magnetic core and support member according to the first embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 100, winding frame; 110, base; 111, connection port; 112, pin; 113, connection portion; 114, insertion portion; 114a, socket; 115, lead frame; 115a, embedded portion; 115b, winding terminal; 115c, exposed portion; 120, winding shaft; 121, hollow space; 1211, groove; 122, assembly portion; 123, transition portion; 124, winding portion; 125, flow Through hole; 126, ventilation opening; 200, coil; 300, magnetic core; 400, shell; 401, mounting port; 402, notch; 500, support member; 510, first contact portion; 520, second contact portion; 530, first split; 540, second split; 550, third split; 610, first shock-absorbing layer; 620, second shock-absorbing layer; 710, first potting material; 720, second potting material. DETAILED DESCRIPTION

[0041] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0042] It should be noted that when an element is considered to be “connected to” another element, it can be directly connected to the other element or there may be an intervening element at the same time.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0044] In the present invention, “first” and “second” do not represent specific numbers and orders, but are only used to distinguish names.

[0045] like Figures 1 to 5 As shown, the antenna device includes a winding frame 100, a coil 200, a magnetic core 300, a housing 400 and a support 500. The winding frame 100 includes a base 110 and a winding shaft 120. The base 110 is provided with a wiring port 111, and the wiring port 111 is provided with a pin 112. The winding shaft 120 is hollow. The winding shaft 120 includes an assembly portion 122, a transition portion 123 and a winding portion 124 arranged in sequence along the axial direction, and the assembly portion 122 cooperates with the base 110. The coil 200 is wound around the winding portion 124. The coil 200 is connected to the pin 112. The magnetic core 300 is partially or completely arranged in the hollow space 121 of the winding shaft 120. The housing 400 is provided with an installation space and an installation opening 401 communicating with the installation space. The magnetic core 300 and the winding shaft 120 are both inserted into the winding portion 124 of the housing 400 through the installation opening 401. The support member 500 is connected to the winding frame 100 or integrally formed therewith. The support member 500 includes a first contact portion 510 and a second contact portion 520 protruding from the outer surface of the winding shaft 120. When the winding shaft 120 extends into the installation space, the support member 500 is located within the installation space. The first contact portion 510 and the second contact portion 520 are in contact with or have a clearance fit with the top wall and bottom wall of the installation space, respectively.

[0046] In the above-mentioned antenna device, the magnetic core 300 is partially or completely arranged in the hollow space 121 of the winding shaft 120, the coil 200 is wound outside the winding frame 100 and the coil 200 is connected to the pin 112 on the base 110. The coil 200 can be electrically connected to the external circuit through the pin 112, and the magnetic core 300 and the winding frame 100 are assembled with the housing 400 by inserting them into the installation space through the installation opening 401. Theoretically, as long as the winding frame 100 and the shell 400 are matched with sufficient accuracy, the winding shaft 120 will naturally be inside the shell 400 after installation and will not contact the shell 400. However, due to the error in precision control and the limitation of processing accuracy in mechanical aspects, the actual winding frame 100 is not tightly fitted after being inserted into the shell 400. Moreover, since the magnetic core 300 is relatively long and has a certain weight and the gap reserved between the winding shaft 120 and the shell 400 is very small, it is easy to cause the end of the winding part 124 away from the transition part 123 to contact the shell 400 due to poor fit and gravity. In other words, this contact is a direct physical contact between the winding shaft 120 and the shell 400, which will affect the overall shockproof effect. Because the winding frame 100 is connected to or integrally formed with the support member 500, the support member 500 has a first contact portion 510 and a second contact portion 520 that protrude from the outer surface of the winding spool 120. When the magnetic core 300 and the winding frame 100 are inserted into the installation space, the first contact portion 510 contacts or has a clearance fit with the top wall of the installation space, while the second contact portion 520 contacts or has a clearance fit with the bottom wall of the installation space. Thus, the first contact portion 510 and the second contact portion 520 act as a positioning mechanism for the winding spool 120, allowing the winding spool 120 to be suspended relative to the housing 400 within the installation space. This prevents direct contact between the winding spool 120 and the housing 400, and reduces direct impact on the winding spool 120 caused by collisions with the housing 400. Thus, the first contact portion 510 and the second contact portion 520 act as a buffer between the winding spool 120 and the housing 400, protecting the winding spool 120 and improving the shockproof performance of the antenna device, thereby preventing damage to the magnetic core of the antenna device due to vibration.

[0047] like Figure 2 and Figure 5 As shown, in this embodiment, the support member 500 is located at an end of the winding portion 124 away from the transition portion 123 .

[0048] Alternatively, as Figure 5 and Figure 9As shown, both ends of the coil 200 are wound from the same end of the winding spool 120 to the other end of the winding spool 120, so that both ends of the coil 200 can be connected to the pins 112 on the base 110. However, in other embodiments, the coil 200 may also include a winding portion and a through portion that are connected to each other. The winding portion is formed by copper wire being wound from one end of the winding spool 120 to the other end of the winding spool 120. One end of the through portion is connected to one end of the winding portion, and the other end of the through portion spans the winding spool 120 and is located at the same end of the winding spool 120 as the other end of the winding portion.

[0049] Specifically, in this embodiment, Figure 3 and Figure 5 As shown, the support member 500 includes a first body 530, a second body 540 and a third body 550. The second body 540 and the third body 550 are respectively connected to the two ends of the first body 530. The winding shaft 120 is located between the second body 540 and the third body 550. The first contact portion 510 is provided on the side of the first body 530 away from the second body 540 and the third body 550. The end of the second body 540 and / or the third body 550 away from the first body 530 is the second contact portion 520. The support member 500 has a simple structure and has high support stability. It can support the winding shaft 120 so that the winding shaft 120 is in a suspended state in the installation space of the housing 400, thereby avoiding direct contact with a large area between the winding shaft 120 and the housing 400. In addition, when the housing 400 is impacted, the second split body 540 and the third split body 550 will be elastically deformed, thereby reducing the impact transmitted from the housing 400 to the winding shaft 120 .

[0050] It should be noted that “the end of the second split 540 / or the third split 550 away from the first split 530 is the second contact portion 520” includes three implementation modes: the end of the second split 540 away from the first split 530 is the second contact portion 520, or the end of the third split 550 away from the first split 530 is the second contact portion 520, or the ends of the second split 540 and the third split 550 away from the first split 530 are both the second contact portion 520.

[0051] In order to improve the stability of the support member 500 when supporting the winding shaft 120, specifically, in this embodiment, as shown in FIG. Figure 3 As shown, the ends of the second split body 540 and the third split body 550 away from the first split body 530 are both second contact portions 520. In this way, a relatively stable triangular structure can be formed between the two second contact portions 520 and the first contact portion 510.

[0052] Specifically, in this embodiment, one end of the second split body 540 and the third split body 550 away from the first split body 530 is bent to form the second contact portion 520 .

[0053] In one embodiment, if Figure 2 and Figure 10 As shown, the base 110 includes a connecting portion 113, an inserting portion 114, and a lead frame 115. The connecting portion 113 is provided with a wiring port 111. The inserting portion 114 is provided with a socket 114a. One end of the winding spool 120 is inserted into the socket 114a, and the lead frame 115 is fixed in the connecting portion 113 in an embedded manner (for example, in an integrally molded manner). The lead frame 115 includes a pin 112 extending from the wiring port 111, an embedded portion 115a embedded in the connecting portion 113, and a winding terminal 115b extending from the connecting portion 113. After the coil 200 is connected to the winding terminal 115b, it is electrically connected to the pin 112 via the embedded portion 115a. At this time, the base 110 and the winding shaft 120 are plug-fitted. The magnetic core 300 can be installed into the winding shaft 120 first, and then the winding shaft 120 is inserted into the socket 114a, which makes assembly simpler and helps improve production efficiency.

[0054] Specifically, if Figure 2 and 10 As shown, one end of the pin 112 passes through the connecting portion 113 and the inserting portion 114 in sequence and extends out of the inserting portion 114 . The coil 200 is connected to the pin 112 by being wound around the end of the pin 112 extending out of the inserting portion 114 .

[0055] In other embodiments, the base 110 and the winding shaft 120 may also be an integrally formed structure.

[0056] Alternatively, as Figure 10 As shown, the embedded portion 115 a is formed with an exposed portion 115 c exposed to the outside, and the exposed portion 115 c is used to electrically connect to the capacitor and form a resonant circuit with the coil 200 .

[0057] The magnetic core 300 and the winding frame 100 can be assembled using the following method, which includes the following steps:

[0058] The magnetic core 300 is installed in the hollow space 121 of the winding shaft 120;

[0059] Assemble the winding spool 120 and the base 110;

[0060] The coil 200 is wound around the bobbin 120 , and the ends of the coil 200 are connected to the pins 112 .

[0061] At this time, the winding shaft 120 and the base 110 are assembled first and then the coil 200 is wound, which facilitates the connection between the coil 200 and the pin 112. There is no need to consider the protection of the coil 200 when assembling the magnetic core 300 and the winding shaft 120, and the operation is simpler.

[0062] Alternatively, as Figure 1 and Figure 2As shown, the connecting portion 113 of the base 110 is located outside the shell 400, and the inserting portion 114 of the base 110 is partially inserted into the mounting opening 401. The connecting portion 113 and the inserting portion 114 are connected by a matching portion, and the connecting portion 113, the matching portion and the inserting portion 114 form a U-shaped structure. The shell 400 is provided with a notch 402 at the edge of the mounting opening 401, and the matching portion matches the notch 402. In the process of inserting the winding frame 100 into the mounting opening 401, the matching portion and the notch 402 are matched to guide and position the installation of the winding frame 100, thereby ensuring that the relative position of the winding frame 100 and the shell 400 is stable.

[0063] Alternatively, as Figure 2 As shown, the cross-sectional dimension of the insertion portion 114 is larger than the cross-sectional dimension of the winding shaft 120. Then, after the winding shaft 120 is inserted into the insertion portion 114 and the assembled structure of the winding shaft 120 and the insertion portion 114 is inserted into the housing 400, if the insertion portion 114 and the inner wall of the housing 400 are in an excessive or clearance fit, there must be a clearance fit between the winding shaft 120 and the inner wall of the housing 400.

[0064] See also Figure 2 、 Figures 6 to 8 In one embodiment, based on the above embodiment, a gap is provided between the magnetic core 300 and the bottom wall of the winding shaft 120, and a first shock-absorbing layer 610 is provided in the gap. This prevents damage to the magnetic core 300 caused by hard contact between the magnetic core 300 and the bottom wall of the winding shaft 120 when the winding shaft 120 vibrates, thereby providing a good buffering effect.

[0065] Furthermore, in an embodiment, Figure 3 、 Figure 5 and Figure 8 As shown, a groove 1211 is provided on the bottom wall of the bobbin 120. The groove 1211 is filled with a first shock-absorbing layer 610. This increases the thickness of the first shock-absorbing layer 610, improving its shock-absorbing effect and effectively protecting the magnetic core 300 from damage such as breakage.

[0066] See also Figure 2 、 Figure 6 and Figure 8Based on the above embodiment, in one embodiment, a second shock-absorbing layer 620 is provided between the bottom surface of the winding spool 120 and the housing 400. A gap exists between the other surfaces of the winding spool 120 and the inner wall of the housing 400. The second shock-absorbing layer 620 provided between the bottom surface of the winding spool 120 and the housing 400 acts as a buffer, reducing the vibration amplitude of the winding spool 120. The gap between the other side surfaces of the winding spool 120 and the inner wall of the housing 400 prevents the winding spool 120 from excessive hard contact with the inner wall of the housing 400 when vibrating or accidentally falling. This prevents deformation of the housing 400 from transferring stress to the winding spool 120 through other surfaces. This protects the winding spool 120 and further prevents damage to the magnetic core 300 within the winding spool 120 due to external forces such as vibration or falling. This allows the antenna device to operate normally even in the presence of vibration, improving the stability of the antenna device and extending its service life.

[0067] Specifically, in this embodiment, the first shock-absorbing layer 610 and the second shock-absorbing layer 620 are solidified glue, so that the first shock-absorbing layer 610 and the second shock-absorbing layer 620 have a good buffering effect and can also improve the installation security between the magnetic core 300, the winding shaft 120 and the housing 400.

[0068] In order to allow the glue entering the housing 400 to enter the winding shaft 120 to form a first shock absorbing layer 610 between the bottom wall of the winding shaft 120 and the magnetic core 300. Specifically, in this embodiment, as Figure 6 As shown, a flow hole 125 is provided on the bottom wall of one end of the winding shaft 120 close to the base 110 .

[0069] Specifically, the flow hole 125 is provided on the bottom wall of the transition portion 123 of the bobbin 120 .

[0070] In order to ensure that the glue can flow evenly on the bottom wall of the winding shaft 120, specifically, in this embodiment, as Figure 5 and Figure 6 As shown, a ventilation opening 126 is provided at one end of the winding shaft 120 close to the base 110 .

[0071] Specifically, the ventilation opening 126 is provided on the top wall of the transition portion 123 of the bobbin 120 .

[0072] Optionally, the glue is polyurethane resin, which has stable properties, good adhesion, and high strength, and can ensure stable adhesion between the winding shaft 120 and the magnetic core 300 and between the winding shaft 120 and the inner wall of the housing 400, while also having a good shock absorption effect.

[0073] In other embodiments, the glue may also be polyethylene glue or polypropylene glue.

[0074] The above antenna device can be manufactured using the following method, including the following steps:

[0075] Connect or integrally form the support member 500 on the winding frame 100;

[0076] Insert the winding frame 100 into the housing 400 through the installation opening 401 so that the magnetic core 300 and the winding shaft 120 are located in the installation space of the housing 400;

[0077] Glue is filled into the mounting opening 401. The glue flows from the gap between the winding shaft 120 and the housing 400 to the gap between the bottom surface of the winding shaft 120 and the housing 400 and solidifies to form the second shock-absorbing layer 620. At the same time, the glue enters the winding shaft 120 and flows into the gap between the bottom wall of the winding shaft 120 and the magnetic core 300 and into the groove 1211, solidifying to form the first shock-absorbing layer 610.

[0078] The first potting material 710 and the second potting material 720 are poured into the installation opening 401 in order from inside to outside. The solidification speed of the first potting material 710 is faster than that of the second potting material 720 .

[0079] In the manufacturing method of the above-mentioned antenna device, the support member 500 is connected or integrally formed on the winding frame 100, and the support member 500 includes a first contact portion 510 and a second contact portion 520 protruding from the outer surface of the winding shaft 120. When the winding shaft 120 is placed in the shell 400, the first contact portion 510 and the second contact portion 520 can respectively contact or indirectly cooperate with the top wall and the bottom wall of the shell 400. In this way, the winding shaft 120 can be suspended in the air, and the first contact portion 510 and the second contact portion 520 serve as a buffer between the winding shaft 120 and the shell 400, which can protect the winding shaft 120 and make the antenna device more shockproof. By assembling the winding shaft 120 with the shell 400 in an inserted manner, and filling glue between the bottom surface of the winding shaft 120 and the shell 400 to form a second shock-absorbing layer 620, and filling glue between the bottom wall of the winding shaft 120 and the magnetic core 300 and in the groove 1211 to form a first shock-absorbing layer 610, the winding shaft 120 can be bonded and fixed to the shell 400, and excessive direct contact between the winding shaft 120 and the shell 400 can be avoided. The magnetic core 300 can be bonded and fixed to the winding shaft 120, and excessive hard contact between the magnetic core 300 and the winding shaft 120 can be avoided. On the one hand, after the glue solidifies, it can reduce the vibration of the winding shaft 120 and the magnetic core 300, protect the winding shaft 120 and the magnetic core 300, and reduce the vibration amplitude of the winding shaft 120 and the magnetic core 300. On the other hand, when subjected to a large external force impact, since the winding shaft 120 is only in direct contact with the shell 400 through the glue on the bottom surface, and the magnetic core 300 is also in direct contact with the winding shaft 120 through the glue on the bottom surface, the stress rebounded from the shell 400 cannot be directly transmitted to the winding shaft 120 and the magnetic core 300 from other surfaces, which can protect the winding shaft 120 and further prevent the magnetic core 300 in the winding shaft 120 from being damaged due to vibration. The antenna device can work normally even in the presence of large vibrations, etc., which improves the stability of the antenna device and the service life of the antenna device. At the same time, the first potting material 710 and the second potting material 720 are poured into the installation port 401 in sequence. Since the first potting material 710 solidifies quickly, the assembly of the winding shaft 120 and the shell 400 can be fixed to prevent the second potting material 720 from entering the space where the winding shaft 120 is located, ensuring that only the bottom surface of the winding shaft 120 and the shell 400 are in contact with the glue. Then the second potting material 720 can fill the remaining space, so that the sealing and integrity of the antenna device after installation are better.

[0080] Specifically, when pouring glue into the shell 400, one end of the shell 400 having the mounting opening 401 can be raised first. In this way, the glue will flow in the shell 400 and enter the winding shaft 120 from the flow hole 125 so that the glue can be fully filled between the magnetic core 300 and the bottom wall of the winding shaft 120.

[0081] Specifically, the first potting material 710 is a single-component silicone, and the second potting material 720 is a polyurethane glue. The first potting material 710 rapidly solidifies to form a barrier, preventing the second potting material 720 from entering the space between the bobbin 120 and the housing 400, as well as the space between the bobbin 120 and the magnetic core 300. The second potting material 720 has good permeability, forming a dense, insulating, and moisture-proof encapsulation layer.

[0082] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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.

[0083] The above embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An antenna device, characterized in that: include: A winding frame, comprising a base and a winding shaft, wherein the base is provided with a wiring port, wherein pins are provided in the wiring port, and the winding shaft is hollow and comprises an assembly portion, a transition portion, and a winding portion sequentially arranged along the axial direction, wherein the assembly portion cooperates with the base; a coil, the coil being wound around the winding portion and connected to the pin; a magnetic core, wherein the magnetic core is partially or entirely disposed in the hollow space of the winding shaft; a housing, wherein the housing is provided with an installation space and an installation opening communicating with the installation space, and the magnetic core and the winding shaft are both inserted into the installation space through the installation opening; and The support member is integrally formed with the winding frame, and the support member includes a first split, a second split and a third split, the second split and the third split are respectively connected to the two ends of the first split, and the support member also includes a first contact portion and a second contact portion protruding from the outer surface of the winding shaft, wherein the first contact portion is provided on the first split, and the second contact portion is formed by bending the ends of the second split and the third split away from the first split, so that a triangular structure is formed between the first contact portion and the second contact portion, and when the winding shaft extends into the installation space, the support member is located in the installation space, and the first contact portion and the second contact portion are respectively in contact with or clearance fit with the top wall and bottom wall in the installation space.

2. The antenna device according to claim 1, wherein The first contact portion is disposed on a side of the first split body away from the second split body and the third split body.

3. The antenna device according to claim 1, wherein The base includes a connecting portion, an inserting portion and a lead frame, the connecting portion is provided with the wiring port, the inserting portion is provided with a socket, one end of the winding shaft is inserted into the socket, and the lead frame is fixed in the connecting portion in an embedded manner. The lead frame includes the pin extending into the wiring port, an embedded portion embedded in the connecting portion, and a winding terminal extending from the connecting portion, wherein the coil is electrically connected to the winding terminal via the embedded portion and the pin.

4. The antenna device according to claim 3, wherein: The embedded portion is formed with an exposed portion exposed to the outside, and the exposed portion is used to electrically connect to the capacitor and form a resonant circuit with the coil.

5. The antenna device according to claim 1, wherein There is a gap between the magnetic core and the bottom wall of the winding shaft, and a first shock-absorbing layer is provided in the gap.

6. The antenna device according to claim 5, characterized in that A groove is provided on the bottom wall of the winding shaft, and the first shock-absorbing layer is filled in the groove.

7. The antenna device according to claim 6, wherein: A flow hole is provided on the bottom wall of one end of the winding shaft close to the base.

8. The antenna device according to claim 6, wherein: A ventilation opening is provided at one end of the winding shaft close to the base.

9. The antenna device according to claim 6, wherein: A second shock-absorbing layer is provided between the bottom surface of the winding shaft and the shell, and a gap exists between the other surfaces of the winding shaft and the inner wall of the shell.

10. The antenna device according to claim 9, characterized in that The first shock-absorbing layer and the second shock-absorbing layer are solidified products of glue.

11. A method for manufacturing the antenna device according to claim 10, characterized in that: The following steps are involved: The support member is integrally formed on the winding shaft of the winding frame, and a flow hole is provided on the bottom wall of one end of the winding shaft close to the base; Inserting the winding frame into the housing through the installation opening so that the magnetic core and the winding shaft are located in the installation space of the housing; The installation opening is filled with the glue, and the glue flows from the gap between the winding shaft and the housing to between the bottom surface of the winding shaft and the housing and solidifies to form the second shock-absorbing layer. At the same time, the glue enters the winding shaft from the flow hole and flows into the gap between the bottom wall of the winding shaft and the magnetic core and into the groove, and solidifies to form the first shock-absorbing layer. A first potting material and a second potting material are poured into the installation opening in order from inside to outside, and the solidification speed of the first potting material is faster than that of the second potting material.

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