KR20150031895A - Antenna of card type smart key using vehicle and producting method thereof - Google Patents

Abstract

A method of manufacturing an antenna and an antenna of a card-type vehicle radio transceiver is disclosed. According to the present invention, since the coil terminal of the antenna is extended to the upper surface of the flange and buried in the circuit board, the position of the circuit board on which the flange is fixed and the position of the circuit board on which the coil terminal is embedded, The generation of the adhesive agent for fixing the existing flange and the metallic compound generated from the lead component for fixing the coil terminal are interrupted, so that disconnection of the coil terminal can be fundamentally prevented.

Description

TECHNICAL FIELD [0001] The present invention relates to an antenna of a card-type vehicle radio transceiver,

Field of the Invention [0002] The present invention relates to an antenna of a card-type vehicle radio transceiver and a method of manufacturing the same, and more particularly, to an apparatus and method for fundamentally eliminating a contact failure of an antenna for receiving signals received in the X- and Y- .

A typical wireless transceiver is a portable terminal that performs authentication of a driver and a vehicle through short distance communication with an immobilizer installed inside a vehicle and detects a vehicle door lock or the like when the authenticated driver is within a predetermined predetermined distance based on the authentication result Thereby controlling the driving of a plurality of electric components including the electric motor.

However, when the driver moves away from the vehicle in an appropriate distance, the vehicle is subjected to an authentication procedure for driving and controlling a plurality of electronic products such as theft prevention, breakage prevention, and automatic unlocking of the vehicle.

In addition, the wireless transceiver will start the engine when an authenticated driver is located in the vehicle and then selects a separate engine start button installed in the vehicle.

Such a radio transceiver typically includes a circuit board and a battery supplying power, an emergency key for starting the engine in an emergency, and a circuit board embedded with electronic components.

That is, in the conventional automotive radio transmitter, the circuit board on which the electronic parts are mounted is positioned within the molding die, and the molded circuit board is molded and thermosetted with an epoxy-based thermosetting resin material to seal and cure the mounted circuit board.

In order to receive data transmitted from the vehicle through the LF communication, antennas in the X-, Y-, and Z-axis directions are typically formed, and each of the antennas in the X-, Y-, and Z- .

In the case of the X-axis and Y-axis antennas, the winding wire constituting the coil is used as it is to electrically connect the coil wound on the bobbin on which the ferrite core of the magnetic body is inserted.

That is, the antenna forms a pair of flanges on both side surfaces in the longitudinal direction of the bobbin, and the flange is fixed to a predetermined position of the circuit board by soldering to the lower surface with an adhesive.

The terminals of the coil wound on the bobbin are buried in a soldering process at a predetermined position of the circuit board through the lower surface of the flange.

At this time, since the winding wire of the bobbin coil embedded in the flange and the circuit board is placed at the adjacent position, the soldered adhesive material of the flange and the winding wire embedded in the circuit board are often connected, Inter-metallic compound (IMC) was formed between the solder-bonded adhesive and the copper of the coil, and electrical short-circuiting occurred as the coil melted.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing a bobbin in which a coil terminal is extended to an upper surface of a pair of flanges formed on both sides of a bobbin on which a coil is wound, Accordingly, since the adhesive for fixing the flange to the circuit board and the coil terminal are connected to the circuit board at a predetermined distance, the electrical disconnection of the coil terminal due to the adhesive for fixing the flange can be fundamentally prevented, And an antenna of a card-type vehicle radio transceiver that can increase the reliability of a transceiver and a manufacturing method thereof.

According to an aspect of the present invention, there is provided an antenna of a card-type vehicle radio transceiver,

A bobbin having a through hole into which a core formed of a bar-shaped magnetic material is inserted and which winds a coil to the outside,

And a flange fixedly attached to a predetermined position of the circuit board through soldering of an adhesive and preventing the coil from being separated from the bobbin at each edge of both sides of the bobbin,

The coil terminal

And extends in the upward direction of the flange, and is embedded in a predetermined position of the circuit board through a soldering process so as to be electrically connected.

According to an aspect of the present invention, there is provided a method of manufacturing an antenna of a card-type vehicle radio transceiver,

A step of inserting a core formed of a bar-shaped magnetic material into the inside and winding the coil to the outside,

The coil terminals being extended to upper surfaces of flanges provided at both sides of the bobbin and embedded in a circuit board through a soldering process to electrically connect the coil terminals to the circuit board;

And fixing the bottom surface of the flange to the circuit board at a predetermined position by a soldering process of an adhesive material.

As described above, the antenna of the card-type vehicle wireless transceiver according to the present invention and the method of manufacturing the same according to the present invention are characterized in that a coil terminal is extended to the upper side of a pair of flanges formed on both sides of a bobbin on which a coil is wound, Since the adhesive for fixing the flange to the circuit board and the coil terminal are connected to the circuit board at a predetermined distance, the electrical disconnection of the coil terminal due to the adhesive for fixing the flange can be fundamentally prevented, And the reliability of the vehicle radio transceiver can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further understand the technical idea of the invention. And should not be construed as limiting.
FIG. 1 is a view showing a state in which an antenna of a card-type vehicle radio transceiver to which the present invention is applied is mounted.
2 is a perspective view showing a configuration of an antenna of a card-type vehicle radio transceiver according to an embodiment of the present invention.
3 is a flowchart illustrating a manufacturing process of a card-type vehicle antenna according to an embodiment of the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

1 is a view showing a state where an antenna of a card-type vehicle radio transceiver to which the present invention is applied is mounted on a circuit board. As shown in Fig. 1, a card-type vehicle radio transceiver to which the present invention is applied includes a coil wound around a bobbin for data communication with a vehicle in X and Y axis directions so as to receive data transmitted from a vehicle through LF communication And an antenna (10) formed by connecting a coil terminal including an input / output terminal of a coil to a corresponding pin of an MCU (Micro Control Unit) through an electrical connection of a circuit board.

2 is a perspective view showing the configuration of the antenna 10 shown in FIG. 1 in detail. As shown in FIG. 3, the card-shaped vehicle antenna to which the present invention is applied has a through hole into which a core formed of a bar-shaped magnetic material is inserted, A bobbin 11 and a flange 13 fixed to the circuit board at predetermined positions through soldering of an adhesive and preventing the coils from being separated from the bobbin at each edge of both sides of the bobbin.

Here, the bobbin 11 is made of an insulating material such as an insulating plastic,

Is approximately a rectangular parallelepiped. A flange 15 is formed at each edge of a pair of mutually facing surfaces of the bobbin main body 11 and coils are wound on the other four surfaces. It is a matter of course that the outer shape of the bobbin 11 can be deformed by the manufacturer.

In the bobbin main body 11, a through hole 12 is formed along the longitudinal direction of the rectangular parallelepiped. Accordingly, through holes are formed in the right and left side surfaces of the bobbin main body 11, and the cross-section of the through holes 12 may be formed in a rectangular shape or a circular shape and may be similar to the shape of the bobbin 11. In this case, the bobbin 11 is formed to be thin with a substantially uniform thickness.

A winding wire made of a conductive material such as a copper wire is wound around the bobbin 11 to form the coil 13.

Since the flanges 15 are formed on both edges of the bobbin 11 in the longitudinal direction, there is no fear that the coil 13 will escape from the bobbin 11. Then, the winding of the coil 13 can be started and stopped at one side within the both edges by the flange.

The upper surface of the flange 15 is referred to as an upper surface 15a and the surface facing the upper surface 15a of the flange 15 is referred to as a lower surface 15d.

The lower surface 15d of the flange 15 is fixed to a predetermined position of the circuit board by a soldering process of the adhesive material at a predetermined position of the circuit board.

The coil terminals 13a and 13b including the start and end terminals of the coil 13 wound on the bobbin 11 extend in the direction of the top surface of the flange 15 and then are soldered to the circuit board So that they are electrically connected to each other.

That is, the coil terminals 13a and 13b are bent by the upper surface 15a of the flange 15 and the bent coil terminals 13a and 13b are buried in the circuit board through the soldering process. Since the coil terminals 13a and 13b are provided between the position of the circuit board on which the flange 15 is fixed and the position of the circuit board on which the coil terminals 13a and 13b are embedded, 15 and the metallic compound generated from the lead component for fixing the coil terminal are interrupted, so that disconnection of the coil terminal can be fundamentally prevented.

A capacitor (not shown) is installed in the coil terminals 13a and 13b. The capacitor is mounted on the circuit board by soldering to one of the coil terminals 13a and 13b, so that the coil 13 and the capacitor are electrically connected by a circuit board to form a resonant circuit.

In this antenna coil, the reception sensitivity with the immobilizer of the vehicle is determined according to the characteristics such as the resonance frequency of the resonance circuit (resonance circuit) including the coil and the capacitor.

An antenna manufacturing process in which the coil terminals 13a and 13b of the coil are extended to the upper surface of the flange 15 and embedded in a predetermined position of the circuit board will be described with reference to FIG.

3 is a view illustrating an antenna manufacturing process of the card-type vehicle radio transceiver shown in FIG. 2 according to an embodiment of the present invention. As shown by way of example only in Fig. 3, a card-type vehicle radio transceiver firstly includes a communication-related part for performing data communication with a vehicle on one side of a circuit board in step 101, A part including an authentication related part (MCU: Micro Control Unit)

After the product is embedded, the process proceeds to step 103.

As shown in Figs. 2 and 3, the antenna, which is one of communication-related parts embedded in the circuit board, includes an antenna 10 for data communication with the vehicle in the X and Y axis directions wound on the bobbin 11, .

The antenna 10 is provided to perform data communication with the vehicle in the X axis direction and the Y axis direction and the antenna 10 includes a coil 13 wound around the bobbin 11, Are provided on the circuit board so as to have an orthogonal angle to each other in the X-axis and Y-axis directions.

The coil terminals 13a and 13b including the output terminal and the input terminal of the coil 13 are connected to corresponding pins of an MCU (Micro Control Unit) embedded in a predetermined position of the circuit board 51, To be input to the other corresponding pin of the MCU.

Hereinafter, a series of steps 101 for manufacturing the antenna 10 and then embedding it in the circuit board will be described in more detail.

A core formed of a bar-shaped magnetic material is wound on a bobbin 11 having a through-hole inserted and inserted through a through-hole having a predetermined diameter or less (steps 101a, 101b).

A flange 15 is formed on both sides of the edge of the bobbin 11 and a bottom surface 15d of the flange 15 is fixed to a predetermined position of the circuit board through a soldering process.

The coil terminals 13a and 13b including the input and output ends of the wound coil are extended through the upper surface 15a of the flange 15 and inserted into corresponding pins of the MCU embedded in the predetermined positions of the circuit board It is fixed by soldering process. That is, the coil terminals 13a and 13b are electrically connected to the circuit board (steps 101c and 101d).

A capacitor (not shown) is buried on one side of the coil terminals 13a and 13b and then is electrically connected to one terminal of the coil 13 to form a resonance circuit (step 101e).

In the step (103), a battery accommodating member provided on one side of the circuit board and including a battery terminal connected to the circuit board, and an emergency key receiving member provided on the other side of the circuit board do.

Here, when the battery is housed in the battery storage groove, the battery storing member is electrically connected between the battery terminals, and the flow of the current is electrically connected to the circuit board 51.

The emergency key receiving member is provided to be fixed to a predetermined position of the circuit board through a soldering process.

If the circuit board 51, the battery accommodating member and the emergency key accommodating member are formed through the above steps (101) and (103), the process proceeds to step 105.

After inserting the inserting block into each of the inside of the emergency key accommodating member and the battery accommodating member in the step (105), the battery housing member, the emergency key accommodating member, and the upper and lower surfaces of the circuit board 51, A molding die is provided to form a cavity which is a space layer with the molding die on each of the upper and rear surfaces of the circuit board 51.

Next, at step 107, epoxy resin is filled into the cavity by a high-temperature and high-pressure pressing process to form a resin case for sealing left and right upper and lower surfaces of the wireless transceiver.

After the step 107 is performed, the inserting block is removed from the molding die, and then the process proceeds to step 109 where the resin case is fully cured.

In step 109, the temperature of the inserting block and the temperature difference of the resin case are formed, and the inserting block is removed from the resin case by heat shrinkage. Thereafter, the resin case is maintained in the high temperature (oven) Thereby completely curing the resin case.

In step 111, a log sheet and a decoration sheet are attached using a double-sided tape.

Accordingly, after the adhesive is applied to the front surface of the flexible film, the metallic copper foil is fusion-bonded, and the laminated circuit board is mounted on the bobbin 11 through the step (101) And data communication is performed with the vehicle in the X and Y axis directions wound around the coil 13. [

The battery is housed in the battery housing member installed through the step (103), the emergency key is housed in the emergency key housing member, and the battery terminal is connected to the conductive layer of the circuit board (11).

Therefore, the battery power is supplied to the communication-related parts of the circuit board 11 and the antenna, and the communication-related parts and the antenna are driven. Therefore, a coil 13 of the antenna 10 and a resonance circuit between the capacitors are formed to perform data communication with the vehicle in the X- and Y-axis directions.

In response to the data received via the antenna 10, the authentication-related component of the circuit board transmits the stored authentication data through the antenna, and the transmitted data is received in the vehicle.

According to the embodiment of the present invention, since the coil terminal of the antenna is bent and extended in the direction of the top surface of the flange, the distance between the position of the circuit board on which the flange is fixed and the position of the circuit board on which the coil terminal is embedded Therefore, the generation of the adhesive for fixing the existing flange and the metallic compound generated from the lead component for fixing the coil terminal is interrupted, so that disconnection of the coil terminal can be fundamentally prevented.

That is, the X-axis antenna and the Y-axis antenna of the conventional antenna coil terminal extending to the lower surface and buried in the circuit board have a shear strength of 4.44 kgf and 4.48 kgf respectively, but the antenna coil terminal is extended to the upper surface, According to the buried invention, the X-axis and Y-axis antennas have shear strengths of 4.45 kgf and 4.06 kgf, respectively, so that electrical disconnection within about 5% is reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Since the coil terminal of the antenna is bent and extended to the upper surface of the flange and is embedded in the circuit board, the position of the circuit board on which the flange is fixed and the position of the circuit board on which the coil terminal is embedded are spaced apart and fixed to the circuit board. An antenna of a card-type vehicle radio transceiver which is capable of basically preventing the disconnection of a coil terminal by interrupting generation of an adhesive for fixing the flange of the coil terminal and a metallic compound generated from the lead component for fixing the coil terminal is applied The present invention can be very industrially applicable because it can bring about a great improvement in terms of miniaturization of the vehicle radio transceiver of the vehicle and is not only sufficient for commercialization or sales of the applied vehicle but also can be practically and practically carried out .

Claims (2)

An antenna of a card-type vehicle radio transceiver forming an antenna for receiving data transmitted from a vehicle through LF communication in the X and Y axis directions,
The antenna
A bobbin having a through hole into which a core formed of a bar-shaped magnetic material is inserted and which winds a coil to the outside,
And a flange fixedly installed on the circuit board through soldering of an adhesive to prevent a coil from being separated from the bobbin at each edge of both sides of the bobbin,
The coil terminal
Wherein the flange is extended to the upper surface of the flange and then embedded in a predetermined position of the circuit board through a soldering process so as to be electrically connected thereto. A step of inserting a core formed of a bar-shaped magnetic material into the inside and winding the coil to the outside,
The coil terminals being extended to upper surfaces of flanges provided at both sides of the bobbin and embedded in a circuit board through a soldering process to electrically connect the coil terminals to the circuit board;
And fixing the bottom surface of the flange to the circuit board at a predetermined position by a soldering process of an adhesive material.

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