KR20180037594A - 3-axis type Low Frequency Antenna Module and keyless entry system including the same - Google Patents

Abstract

A triaxis antenna module for solving a defect like a disconnection problem of a coil, and a keyless entry system having the same are provided. According to an embodiment of the present invention, the triaxis antenna module comprises: three coils wound around each of X, Y, and Z axes orthogonal to each other, and vertically arranged to each other; a magnetic core for directly supporting the three coils orthogonally arranged to each other; and a plurality of terminal units being in direct contact with one side of the magnetic core.

Description

[0001] The present invention relates to a 3-axis antenna module and a keyless entry system including the 3-axis antenna module.

The present invention relates to a three-axis antenna module and a keyless entry system including the same, and more particularly, to a three-axis antenna module that can be applied to a keyless entry system that wirelessly operates to lock or open a door of a car, Entry system.

The keyless entry system is such that the door lock is released even if the driver does not operate the key or the remote control separately. That is, when the key is held by the driver and the electronic authentication device inside the vehicle is authenticated with each other, the lock of the door is automatically released.

An antenna module for implementing such a keyless entry system is generally formed by winding a coil in a bar-type ferrite core and mounting a plurality of antenna modules at predetermined positions.

On the other hand, the reception antenna built in the smart key has a problem that reception sensitivity becomes worse when the axial direction of the antenna coil and the direction of the magnetic field generated by the transmission antenna of the vehicle are parallel, and the receiving sensitivity is good and when they are orthogonal to each other.

Therefore, it is necessary to provide a non-directional characteristic so that the signal transmitted from the vehicle at all times can be received in a stable state at the receiving antenna of the smart key regardless of the position of the vehicle with respect to the antenna.

To solve this problem, a three-axis antenna module has been proposed in which three coils are wound orthogonally to each other so as to be able to receive signals in all directions.

However, in the conventional three-axis antenna module, manual operation is required for winding both ends of the three coils, that is, a total of six ends to the connection terminal side, and each coil is exposed to the outside while being wound around the magnetic core It is common.

Accordingly, it takes a long time to connect the connecting terminal of the coil to the connecting terminal, and the problem of disconnection of the coil may occur. In case of mounting the antenna module on the circuit board, .

KR 10-1542000 B1

SUMMARY OF THE INVENTION It is an object of the present invention to provide a triaxial antenna module and a keyless entry system including the triaxial antenna module, which can solve the problem of failure such as coil disconnection.

It is another object of the present invention to provide a three-axis antenna module and a keyless entry system including the three-axis antenna module, which can omit the coil winding operation for electrical connection.

In order to solve the above-described problems, the present invention is characterized by comprising: three coils wound respectively around X-axis, Y-axis and Z-axis orthogonal to each other and arranged vertically to each other; A magnetic core directly supporting the three coils disposed perpendicularly to each other; And a plurality of terminal portions directly contacting one side of the magnetic core.

The magnetic core further includes a first accommodating portion for accommodating a first coil wound around the Y axis, a second accommodating portion for accommodating a second coil wound around the X axis, And a third receiving portion for receiving the third coil.

The bottom surface of the first accommodating portion and the bottom surface of the second accommodating portion form stepped surfaces along the Z axis direction, and the third accommodating portion may be formed along the side of the magnetic core.

The magnetic core may include a first body portion having a rectangular parallelepiped shape; A second body portion formed at both ends of the first body portion so as to protrude from the upper surface and the lower surface of the first body portion at a predetermined height in the Z axis direction; And a plurality of vanes protruding from an upper surface and a lower surface of the second body portion in a direction parallel to the XY plane, respectively.

The second receiving portion is formed between two wing portions spaced apart from each other in the X-axis direction among the plurality of wing portions. The third receiving portion is formed on the upper surface and the lower surface of the second body portion in the Z- The two wing portions being spaced apart from each other.

The plurality of wings may include a first wing portion formed on an upper surface of the second body portion and a second wing portion formed on a lower surface of the second body portion, And the plurality of terminal portions may be in contact with the second wing portion side.

The plurality of terminal portions may be disposed on one side of the magnetic core so that the plurality of terminal portions are not directly underneath the coil wound around the side of the magnetic core among the three coils.

The terminal portion may include a contact portion that is in direct contact with the magnetic core and a bent portion that is bent from the end of the contact portion for electrical connection with the outside. At this time, both ends of the three coils may be welded to the bent portion side.

In addition, at least one of the plurality of terminal portions may be formed with a separation wall for preventing separation from the magnetic core. At this time, among the plurality of terminal portions, the terminal portions formed with the separation dividers may be arranged in a diagonal direction with respect to each other.

For example, the separation preventing member may be at least one protruding portion protruding from the contact portion side, and a groove portion corresponding to the protruding portion may be formed on the magnetic core side.

As another example, the separation preventing member may be a plate-shaped retaining plate extending from the bent portion in a direction parallel to the XY plane, and a seating groove may be formed on one surface of the magnetic core so that the retaining plate can be inserted.

As another example, the terminal portion may include a contact portion that is in direct contact with the magnetic core, and a gap portion that is extended from the contact portion to form a gap with the magnetic material core and is bent from an end portion of the gap portion for electrical connection to the outside And a through hole for preventing the magnetic core and the terminal portion from separating from each other may be formed on the gap portion side. In this case, the through-hole side is filled with the insulating resin when molding is performed through the molding body made of the insulating resin, so that the terminal portion and the magnetic body core can be integrated with each other.

In addition, the magnetic core and the plurality of coils may be molded through a molding body made of an insulating resin to prevent exposure to the outside.

The magnetic core may have a winding jig hole extending from the upper surface thereof along the Z-axis direction to a certain depth, and the winding jig hole may be filled through the molding body.

Meanwhile, the three-axis antenna module may be embedded in a smart key, embedded in a mobile terminal, or embedded in a wearable device such as a smart watch.

As another embodiment, a receiver and a transmitter constituting a keyless entry system may be built in the receiver to implement a keyless entry system.

According to the present invention, since the terminal portion is directly in contact with one side of the magnetic core and the end portion of the coil is directly welded to the terminal portion, it is possible to prevent the disconnection of the coil to reduce the defect rate and to omit the coil winding operation, The production cost can be reduced.

FIG. 1 is an external view of a three-axis antenna module according to an embodiment of the present invention. FIG.
Fig. 2 is a bottom view of Fig. 1,
Figure 3 is a partial cutaway view of Figure 1,
FIG. 4 is a bottom plan view showing the relationship between the cut-out portion formed in the terminal portion and the third coil in FIG. 1,
5 is a view showing a coupling relation between a magnetic core, a terminal portion and a coil in a three-axis antenna module according to a first embodiment of the present invention,
FIG. 6 is a sectional view of FIG. 5,
FIG. 7 is a partially cutaway view of FIG. 5,
FIG. 8 is a view showing a state where a coil is removed in FIG. 7,
Fig. 9 is a cross-sectional view taken along line AA and BB in Fig. 5,
10 is a view showing a coupling relation between a magnetic core, a terminal portion, and a coil in a three-axis antenna module according to a second embodiment of the present invention,
11 is a view showing the separation of Fig. 10,
FIG. 12 is an external view of a three-axis antenna module according to a third embodiment of the present invention. FIG.
Fig. 13 is a bottom view of Fig. 12,
Figure 14 is a partial cutaway view of Figure 12,
Fig. 15 is a bottom plan view showing the relationship between the cut-out portion formed in the terminal portion and the third coil in Fig. 12,
FIG. 16 is a view showing the coupling relationship of the magnetic core, the terminal portion, and the coil in FIG. 12;
17 is a view showing the separation diagram of Fig. 16,
FIG. 18 is a partially cutaway view of FIG. 16,
19 is a view showing a state in which a coil is removed in Fig. 18,
Fig. 20 is a cross-sectional view in the CC direction and DD direction in Fig. 16,
FIG. 21 is an illustration of a keyless entry system to which a three-axis antenna module according to the present invention is applied. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

The three-axis antenna module 100, 200, 300 according to an embodiment of the present invention includes a plurality of coils 111, 112, 113, magnetic core 120, 220, 320 and terminal portions 130, 130 ', 130 " .

The plurality of coils 111, 112, and 113 may generate low frequency signals by generating signals in a predetermined frequency band. The plurality of coils 111, 112, and 113 may include a first coil 111, a second coil 112, and a third coil 113. Each of the coils 111, 112, and 113 may include an X axis, a Y axis, So that they can be arranged so as to be orthogonal to each other.

For example, as shown in FIGS. 5, 10 and 16, the first coil 111 may be wound multiple times about the Y axis, and the second coil 112 may be wound around the X axis, And the third coil 113 may be wound a plurality of turns around the Z axis.

Accordingly, the three-axis antenna modules 100, 200, and 300 according to the present invention are arranged so that the three coils 111, 112, and 113 are orthogonal to each other, so that the three-axis antenna modules 100, 200, and 300 can receive signals transmitted from the outside in a stable state at all times. The plurality of coils 111, 112, and 113 may be enameled wires that are enameled outside the copper wire having a predetermined wire diameter. However, the material of the coil is not limited thereto, and it can be used as long as the conductive material is covered with an insulating layer.

The magnetic core 120, 220, and 320 may be formed of a magnetic material to serve as an inductor core. For example, the magnetic core 120, 220, and 320 may be made of sintered ferrite such as Mn-Zn, Ni-Zn, or Ni-Cu-Zn. However, the present invention is not limited thereto. A dust core may be used. It is noted that any material having magnetism can be used. In addition, the magnetic core 120, 220, and 320 may be formed of a soft magnetic alloy having an amorphous or nanocrystal structure.

At this time, the magnetic core 120, 220, and 320 according to the present invention can support the coils 111, 112, and 113 so that the three coils 111, 112, and 113, which are disposed orthogonally to each other as well as the inductor core, can maintain an orthogonal state. Thus, the magnetic core 120, 220, and 320 according to the present invention can directly support at least a portion of each of the coils 111, 112, and 113 when the three coils 111, 112, and 113 are wound at predetermined positions, The orthogonal state can be maintained.

The side surfaces of the plurality of coils 111, 112 and 113 may be covered by the magnetic core 120, 220, and 320, respectively.

7, 8, 18, and 19, the magnetic core 120, 220, and 320 may be formed of a single cylinder, and may include a first coil 111 wound around the Y axis, A second accommodating portion S2 for accommodating the second coil 112 wound around the X-axis and a third coil 113 wound around the Z-axis for accommodating the first coil S1 And a third accommodating portion S3.

For example, the magnetic core 120, 220, and 320 may include a first body 121 having a rectangular parallelepiped shape and a second body 121 having a first body portion 121 and a second body portion 121, And a plurality of wings 123a and 123b protruding from an upper surface and a lower surface of the second body portion 122 in a direction parallel to the XY plane, can do.

The plurality of vanes 123a and 123b may include a first wing portion 123a protruding in a direction parallel to the XY plane from the upper surface of the second body portion 122 and a second wing portion 123b protruding from the second body portion 122, And a second wing portion 123b protruding in a direction parallel to the XY plane from the lower surface of the second body portion 122. At least one first wing portion 123a and a second wing portion 123b, respectively.

Accordingly, the first receiving portion S1 may be formed between the pair of second body portions 122 along the circumferential surface including the upper surface, the lower surface, and the side surface of the first body portion 121, The second receiving part S2 includes two first wing parts 123a and a second wing part 123b spaced apart from each other in the X axis direction among the plurality of wing parts 123a and 123b, Respectively. In addition, the third accommodating portion S3 includes a first wing portion 123a and a second wing portion 123b spaced apart from each other along the Z-axis direction on the upper surface and the lower surface of the second body portion 122, 320, and 320, respectively.

At this time, the bottom surface of the first receiving portion S1 and the bottom surface of the second receiving portion S2 may be formed as stepped surfaces along the Z-axis direction, A surface of the first receiving portion S1 may protrude from the bottom surface of the first receiving portion S1. In addition, the first wing portion 123a and the second wing portion 123b may protrude from the bottom surface of the second accommodating portion S2 in the Z-axis direction, and the first wing portion 123a and the second wing portion 123b may protrude in the Z- The bottom surface of the third accommodating portion S3 formed between the second wing portions 123b may protrude from the side surface of the first body portion 121 and / or the side surface of the second body portion 122 .

Accordingly, the first coil 111 is wound around the Y-axis along the surface of the first body 121 a plurality of times to the first receiving portion S1 side, and the second body 122 is wound around the Y- The second coil 112 is wound on the second accommodating portion S2 side around the X axis a plurality of times so as to surround the second accommodating portion S2 so that the third accommodating portion S2 is surrounded by the third accommodating portion S2b formed between the first wing portion 123a and the second wing portion 123b, The first coil 111, the second coil 112 and the third coil 113 may be arranged so as to be orthogonal to each other when the third coil 113 is wound around the Z axis on the part S3 side.

The step height h1 between the bottom surface of the first accommodating portion S1 and the bottom surface of the second accommodating portion S2 is set to be equal to the height h1 of the entire first coil 111 wound on the first accommodating portion S1, The bottom surface of the second receiving portion S2 and the top surface of the first wing portion 123a or the bottom surface of the second receiving portion S2 and the bottom surface of the second receiving portion S2 may have a thickness equal to or greater than the thickness of the second receiving portion S2, The stepped height h2 of the lower surface of the wing portion 123b may have a thickness equal to or greater than the total thickness of the second coil 112 accommodated in the second accommodating portion S2.

The thickness of the first coil 111 wound around the Y axis along the first receiving portion S1 can be received by the first receiving portion S1 and the thickness of the second receiving portion S2 The thickness of the second coil 112 wound around the X axis can be accommodated by the second accommodating portion S2.

The total thickness of the first coil 111 and the second coil 112 may be the same as the diameters of the first coil 111 and the second coil 112, And may be the entire thickness of the wound coil when the coil 112 is wound to overlap in multiple layers.

The second wing portion 123b formed on the lower surface of the second body portion 122 and the first wing portion 123a formed on the upper surface of the second body portion 122 of the plurality of wing portions The second wing portion 123b may be formed to have a relatively larger area than the first wing portion 123a. In this case, a pair of first wing portions 123a and a second wing portion 123b spaced apart from each other in the Z-axis direction on the upper surface and the lower surface of the second body portion 122, 123b may protrude further outward than the end of the first wing portion 123a.

The second wing portion 123b further protrudes outward from the first wing portion 123a when the terminal portions 130, 130 ', 130 ", and 330 described later are disposed in the second wing portion 123b. As shown in FIG.

Even if the third coil 113 is disposed on the side of the third receiving portion S3 formed between the first wing portion 123a and the second wing portion 123b, 130 ', 130 ", and 330 may not be disposed on the first receiving portion S1 and the second receiving portion S2 side, and the terminal portions 130, 130', 130" The first coil 111 and the second coil 112 disposed on the first coil 111 and the second coil 112, respectively. In this way, the terminal portions 130, 130 ', 130 ", and 330 made of a conductive member such as a metal are disposed so as not to be directly below the coils 111, 112, and 113, 130 ', 130 ", 330. In addition,

Meanwhile, the magnetic core 120, 220, and 320 according to the present invention may be formed with a winding jig hole 126 extending from the upper surface at a predetermined depth along the Z axis direction. When the third coil 113 is wound around the Z-axis direction, a jig (not shown) of the winding device is inserted into the winding jig hole 126 to support the magnetic core 120, 220, and 320. Thus, the winding operation of the third coil 113 can be performed easily. For example, the winding jig holes 126 may be formed on the wing portion 123 side.

The plurality of terminal portions 130, 130 ', 130 ", and 330 may transmit power supplied from the outside to the plurality of coils 111, 112, and 113. For this purpose, 112, and 113 that are wound on the magnetic core 120, 220, and 320, respectively, and both end sides of the coils 111, 112, and 113 may be connected one to one. Accordingly, a power source supplied from the outside can be supplied to the coil side through the plurality of terminal portions 130, 130 ', 130 "

For example, the plurality of terminal portions 130, 130 ', 130 ", and 330 may be spaced apart from each other in the magnetic core 120, 220, and 320 and may be spaced apart from each other. .

At this time, at least a part of the plurality of terminal portions 130, 130 ', 130 ", and 330 may directly contact one side of the magnetic core 120, 220, and 330. The end portions of the coils 111, 130 ", 330).

For example, at least a portion of the plurality of terminal portions 130, 130 ', 130 ", and 330 may be in direct contact with the second wing portions 123b of the magnetic core 120, 220, and 330 and the end portions of the coils 111, Can be welded directly to the terminal portions 130, 130 ', 130 ", 330.

That is, the end portions of the coils 111, 112, and 113 are directly welded to the terminal portions 130, 130 ', 130', and 330 so that the end portions of the coils 111, , 330) may be omitted. This increases work productivity. In addition, since a separate material such as an insulating resin material for coupling the terminal portions 130, 130 ', 130 ", and 330 to the magnetic core 120, 220, and 320 is unnecessary, the production cost can be reduced.

The terminal portions 130, 130 ', 130 "and 330 may include contact portions 131 and 331 that directly contact the magnetic core 120, 220 and 320 and bent portions 132 and 333 for electrical connection to the outside. The plurality of terminal portions 130, 130 ', 130 ", and 330 may be integrated with the magnetic core 120, 220, and 320 through a molding process using an insulating resin in a state of being coupled with the magnetic core 120, 220, Accordingly, at least a portion of the plurality of terminal portions 130, 130 ', 130 ", and 330 can be maintained in direct contact with the magnetic core 120, 220, and 320.

5 and 10, the terminal portions 130, 130 ', and 130' are formed in a substantially 'b' shape so as to be in direct contact with the bottom and side surfaces of the second wing portion 123b And the bent portion 132 extending from the end of the contact portion 131 may be bent in a substantially 'C' shape through a banding operation. 3, a molding body 140 made of an insulating resin is formed on the space side formed between the abutting portion 131 and the bent portion 132, The contact portion 131 may be embedded in the molding body 140 and the bending portion 132 may be exposed to the outside of the molding body 140 so that the contact portion 131 may be embedded in the molding body 140. In this case, And can be connected to the circuit board.

16, the terminal portion 330 may include a contact portion 331 that directly contacts the bottom surface of the second wing portion 123b and a second wing portion 332 that extends from the end portion of the contact portion 331, And a bent portion 333 extending from the end of the gap portion 332 may be formed in the substantially 'C' shape through the banding process, As shown in Fig. Accordingly, one side of the bent portion 333 may be spaced apart from the gap portion 332. 14, a space formed between the side surfaces of the gap portion 332 and the second wing portion 123b, and a space formed between the gap portion 332 and the bent portion 132, The molding body 340 may be filled. In this case, the contact portion 331 and the gap portion 332 can be embedded in the molding body 340, and the bending portion 333 is exposed to the outside of the molding body 340, And can be connected to the circuit board.

The first contact portion 131a or the contact portion 331 contacting the bottom surface of the second wing portion 123b is attached to the magnetic core 120, 220, or 320 through an adhesive member (not shown) As shown in Fig.

4 and 15, arc-shaped cutouts 135 and 334 having a predetermined curvature may be formed in the first contact portion 131a or the contact portion 331. In this case, This is because when the third coil 113 wound on the third accommodating portion S3 is wound in a circular or elliptical shape, the contact area with the second wing portion 123b is maximized, So that the first contact portion 131a or the contact portion 331 is not positioned immediately below the third coil 113. [ Here, the curvature of the cutout portions 135 and 334 may be formed to have the same curvature as the curvature of the third coil 113 wound on the third accommodating portion S3.

Meanwhile, the three-axis antenna module 100, 200, 300 according to the present invention can be molded through a molding body 140, 340 made of an insulating resin as shown in FIGS. 1 and 12.

In this case, the plurality of coils 111, 112, and 113 may be wound so as to be orthogonal to the magnetic core 120, 220, and 320 as described above, and both end portions of the coils may be connected to the terminal portions 130, 130 ' Lt; / RTI >

At this time, the molding bodies 140 and 340 may be formed so that all the remaining portions of the terminal portions 130, 130 ', 130', and 330 except for the bent portions 132 and 333 are sealed.

Accordingly, the three-axis antenna module 100, 200, 300 according to the present invention includes a plurality of coils wound so as to be orthogonal to each other by sealing all the remaining portions except for the terminal portions 130, 130 ', 130 " 112, 113 and the magnetic core 120, 220, 320 can be prevented from being exposed to the outside.

Accordingly, in the process of mounting the three-axis antenna module 100, 200, 300 according to the present invention on a circuit board, the bonding metal such as lead is prevented from being deposited on the side of the coils 111, 112, 113, thereby improving the reliability of the product, .

In addition, since the plurality of coils 111, 112 and 113 arranged so as to be orthogonal to each other are integrated by the molding bodies 140 and 340, problems such as disconnection which may occur during a work process can be prevented from occurring.

2, a protrusion 142 protruding at a predetermined height may be formed on the bottom surface of the molding body 140. The protrusion 142 may include a plurality of terminal portions 130, 130 ', 130' And the protruding portion 142 may be formed to have a thickness that is relatively thinner than the thickness of the bending portion 132. In addition,

When the bent portion 132 is bent from the contact portion 131 and bent to be positioned on the bottom surface of the molding body 140 protrudes from the bottom surface of the molding body 140, It is possible to prevent the terminal portions 130, 130 ', and 130 " protruding from the bottom surface of the molding body 140 from being deformed by an external force in the course of a transportation process or a work process.

13, the molding body 340 may have a seating groove 342 formed therein corresponding to the terminal portion 330 at a position corresponding to the terminal portion 330, The seating groove 342 may have a depth smaller than the thickness of the bent portion 333.

The seating groove 342 is formed to surround the bent portion 333 bent from the gap portion 332 and bent to be positioned on the side surface and the bottom surface of the molding body 340, Lt; / RTI > As a result, the risk of breakage due to an external impact can be further reduced.

In the three-axis antenna module 100, 200, 300 according to the present invention, at least one of the terminal portions 130 ', 130 ", and 330 of the plurality of terminal portions 130, 130', 130" A separation barrier may be formed to prevent the terminal portions 130 ', 130 "and 330 from being separated from the magnetic core 120, 220 and 320.

6 and 11, the separation preventing member may be formed on a contact portion 131 that is in direct contact with the magnetic core 120 in the terminal portion 130 ' And at least one protrusion 133 protruding outward on the side of the second contact portion 131b that contacts the side surface of the second wing portion 123b.

At this time, the magnetic core 120 and the terminal portion 130 'are formed on the side of the second wing portion 123b of the magnetic core 120 by a groove 124 which is drawn inward in a region corresponding to the protrusion 133. [ The protrusion 133 can be inserted into the groove 124. [0050] Accordingly, the protrusion 133 is inserted into the groove 124 to provide a binding force, thereby preventing the terminal portion 130 'from being separated from the second wing portion 123b of the magnetic core 120.

As another example, the separation preventing member may be a plate-shaped latching plate 134 protruding from the bent portion 132 in a direction parallel to the first contact portion 131a, as shown in FIG.

At this time, the upper surface of the second wing portion 123b of the magnetic core 220 is formed with a seating groove 125 which is drawn inward in a region corresponding to the holding plate 134, The engaging plate 134 can be inserted into the seating groove 125 when the first wing portion 130b is coupled to the second wing portion 123b of the second wing portion 123b, 125 of the magnetic core 220 and the first contact portion 131a contacts the lower surface of the second wing portion 123b to provide a binding force so that the terminal portion 130 " Can be prevented.

Here, when at least one of the terminal portions 130, 130 ', 130 "includes at least one terminal portion 130" in the form of a latching plate 134, the plurality of terminal portions 130, 130' 133 and a terminal portion 130 'including a separator region in the form of a terminal.

As another example, the separation preventing member may be formed on the gap portion 332 facing the magnetic core 320 of the terminal portion 330 as shown in FIGS. 14 and 17, and the gap portion 332 The through hole 335 may be a through hole. Here, the through-hole 335 may be in the form of a slot.

As shown in FIG. 14, the insulative resin is filled in the through hole 335 and hardened in the molding process using the insulating resin, so that the magnetic core 320 and the terminal 330 can be integrated. Accordingly, even when an external force such as a drop or an impact is applied, the terminal portion 330 can be prevented from being separated from the magnetic core 320 by increasing resistance to an external force.

The plurality of terminal portions 130, 130 ', 130 ", and 330 may be formed only of the terminal portions 130', 130 ', and 330 having the three types of separation regions described above. 130 "may be constituted by terminal portions 130 ', 130 ", and 330 formed with separation regions. In the case where a separation wall is formed in some of the terminal portions 130 ', 130 ", and 330, the terminal portions 130', 130 ", and 330 having the separation walls are formed in a diagonal direction with respect to the magnetic core 120 And the magnetic core 120, 220, and 320 can be supported at equal positions.

The three-axis antenna module 100, 200, 300 according to the present invention can be applied to a keyless entry system including a low-frequency transmitter and a low-frequency receiver.

For example, the three-axis antenna modules 100, 200, and 300 may include a smart key 10 carried by a user, a portable terminal such as a smart phone, or a KEY FOB built in a wearable device such as a smart watch, ).

Here, the KEY FOB may include a low frequency (LF) receiver including a three-axis antenna module 100, 200, and 300, a 3D active immobilizer, and a microcontroller.

Accordingly, wireless communication using a predetermined frequency band is performed between the key fob (KEY FOB) mounted on the smart key (10) and the control unit mounted on the vehicle, thereby wirelessly communicating at least one of the doors or the steering of the vehicle A lock or an unlock can be controlled.

In addition, the three-axis antenna modules 100, 200, and 300 described above allow the driver to start, operate, and stop the engine while being electronically authenticated without inserting or manipulating a separate mechanical key, System. ≪ / RTI > The three-axis antenna modules 100, 200 and 300 may be implemented by a low-frequency transmitter constituting a keyless entry system, and may be applied to various electronic devices such as VR and AR devices and mobile terminals such as a smart phone .

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, 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.

100, 200, 300: 3-axis antenna module
111: first coil 112: second coil
113: third coil 120, 220, 320: magnetic core
121: first body part 122: second body part
123: wing portion 123a: first wing portion
123b: second wing portion 124: groove portion
125: seating groove 126: winding jig hole
130, 130 ', 130 ", 330: terminal portion 131, 331:
131a: first contact portion 131b: second contact portion
332: gap portion 132, 333:
133: protrusion 134:
135, 334: incision section 335:
S1: first accommodating portion S2: second accommodating portion
S3: Third accommodating portion 140,340: Molding body
142: protrusion 342:

Claims (20)

Three coils wound respectively around the X axis, the Y axis and the Z axis orthogonal to each other and arranged vertically to each other;
A magnetic core directly supporting the three coils disposed perpendicularly to each other; And
And a plurality of terminal portions directly contacting one side of the magnetic core. The method according to claim 1,
The magnetic core may include:
A first receiving portion for receiving a first coil wound about a Y axis, a second receiving portion for receiving a second coil wound about an X axis, and a second receiving portion for receiving a third coil wound about the Z axis And a third receiving portion. 3. The method of claim 2,
Wherein a bottom surface of the first accommodating portion and a bottom surface of the second accommodating portion form a step difference surface along the Z axis direction and the third accommodating portion is formed along the side portion of the magnetic core. 3. The method of claim 2,
The magnetic core may include:
A first body portion having a rectangular parallelepiped shape;
A second body portion formed at both ends of the first body portion so as to protrude from the upper surface and the lower surface of the first body portion at a predetermined height in the Z axis direction; And
And a plurality of vanes protruding from an upper surface and a lower surface of the second body portion in a direction parallel to the XY plane. 5. The method of claim 4,
The second receiving portion is formed between two wing portions spaced apart from each other in the X-axis direction among the plurality of wing portions, and the third receiving portion is formed on the upper surface and the lower surface of the second body portion along the Z- A three-axis antenna module formed between two wing portions spaced apart. 5. The method of claim 4,
Wherein the plurality of vanes include a first wing portion formed on an upper surface of the second body portion and a second wing portion formed on a lower surface of the second body portion,
The second wing portion is formed to have a relatively larger area than the first wing portion,
And the plurality of terminal portions are in contact with the second wing portion side. The method according to claim 1,
Wherein the plurality of terminal portions are disposed on one side of the magnetic core so that the plurality of terminal portions are not directly under the coil that is wound along the side portion of the magnetic core among the three coils. The method according to claim 1,
Wherein the terminal portion includes a contact portion that is in direct contact with the magnetic core and a bent portion that is bent from the end portion of the contact portion for electrical connection with the outside. 9. The method of claim 8,
And both ends of the three coils are welded to the bent portion side. 9. The method of claim 8,
Wherein at least one of the plurality of terminal portions is provided with a separation wall for preventing separation from the magnetic core. 11. The method of claim 10,
The three-axis antenna module according to any one of claims 1 to 3, wherein the protrusion is formed on at least one protrusion formed on the side of the contact portion, and a corresponding groove is formed on the side of the magnetic core to insert the protrusion. 11. The method of claim 10,
The three-axis antenna module according to any one of claims 1 to 5, wherein the separation preventing portion is a plate-like holding plate extending in a direction parallel to the XY plane from the bent portion, and a seating groove is formed on one surface of the magnetic core. 11. The method of claim 10,
Wherein the terminal portions of the plurality of terminal portions are formed in diagonal directions with respect to each other. The method according to claim 1,
Wherein the terminal portion includes a contact portion that is in direct contact with the magnetic core and a bending portion that is bent from an end of the gap portion for electrical connection between the gap portion and the outside that is extended from the contact portion and forms the gap with the magnetic core,
And a through hole for preventing separation of the magnetic core and the terminal portion is formed through the gap portion. 15. The method of claim 14,
Wherein the through-hole side is filled with the insulating resin upon molding through a molding body made of an insulating resin so that the terminal portion and the magnetic body core are integrated with each other. The method according to claim 1,
Wherein the magnetic core and the plurality of coils are molded through a molding body made of an insulating resin to prevent exposure to the outside. A smart key having the three-axis antenna module according to any one of claims 1 to 16. A portable terminal incorporating the triaxial antenna module according to any one of claims 1 to 16. A wearable device incorporating the triaxial antenna module according to any one of claims 1 to 16. receiving set; And a transmitter, the keyless entry system comprising:
A keyless entry system in which the triaxial antenna module according to any one of claims 1 to 16 is incorporated in the receiver.

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