JP4520293B2 - Antenna device and manufacturing method thereof - Google Patents

Description

  The present invention relates to an antenna device in a vehicle electronic key system and a method for manufacturing the antenna device.

  In recent years, when a portable device (transmitter) is carried and the vehicle door is approached, the door is automatically locked / unlocked, and when entering the passenger compartment and sitting in the driver's seat, the engine is allowed to start. An electronic key system is becoming widespread (for example, see Patent Document 1).

  This type of electronic key system includes an out-of-vehicle transmitter provided on a door knob of a vehicle, an out-of-vehicle antenna provided in a pair with the transmitter, an in-vehicle transmitter provided in the vehicle interior, and an in-vehicle receiver. And also has a control device.

  The vehicle outside transmitter transmits a request signal for requesting a response from the portable device to the vehicle outside communication area set around the door outside the vehicle through the vehicle outside antenna. When the portable device enters the communication area outside the vehicle interior, the portable device transmits a response signal to the request signal, and the response signal is received by the vehicle interior receiver. A response signal from the portable device received by the vehicle interior receiver is sent to the control device. On the other hand, the vehicle interior transmitter transmits the request signal to a vehicle interior communication area set, for example, around the driver's seat in the vehicle interior. When the portable device enters the vehicle interior communication area, the portable device transmits a response signal to the request signal, and the response signal is received by the vehicle interior receiver. A response signal from the portable device received by the vehicle interior receiver is sent to the control device.

  The control device determines whether the portable device is located in the vehicle exterior communication area or the vehicle interior communication area based on whether or not a response signal is received from the portable device. The control device unlocks the door when it is determined that the portable device is in the communication area outside the vehicle, and locks the door when it is determined that the mobile device is not within the communication area outside the vehicle. The actuator for locking and unlocking provided on the door is driven and controlled. In addition, the control device permits the start of the engine when it is determined that the portable device is within the vehicle interior communication area, and does not allow the engine start when it is determined that the portable device is not within the vehicle interior communication area. It has become.

  The vehicle interior transmitter includes an antenna device for transmitting the request signal to the vehicle interior communication area. For example, the following configuration is known as the antenna device. That is, as shown in FIG. 13, the antenna device 100 includes a case 101, a printed board 102 accommodated in the case 101, and an antenna 103 connected to the printed board 102.

The case 101 includes a lower case 101a and an upper case 101b, and the lower case 101a and the upper case 101b are combined with the printed board 102 interposed therebetween. On the printed circuit board 102, a transmission circuit for transmitting the request signal to the vehicle interior communication area is mounted. In addition, a lead-out connector 102a is mounted on the printed circuit board 102, and an antenna-side connector 102c is connected to the lead-out connector 102a via a lead wire 102b. The antenna-side connector 102c is pulled out of the case 101, and a vehicle-side connector (not shown) connected at one end to the other end of the lead wire connected to the control device is connected. The antenna 103 includes a rod-shaped ferrite core 103a, a bobbin 103b fixed to the ferrite core 103a in an inserted state, and a coil 103c wound around the bobbin 103b.
JP 2004-025936 A

  However, the conventional antenna device 100 has the following problems. That is, in recent years, with the increase in the number of automobiles and the like, the production amount of the on-vehicle antenna device 100 tends to increase. In such a situation, further improvement in productivity of the antenna device 100 is required. As a means for improving productivity, it is conceivable to reduce the number of parts of the antenna device 100.

  For example, if the antenna-side connector 102c is directly mounted on the printed circuit board 102, the lead wire 102b and the lead-out connector 102a for pulling out the lead wire 102b become unnecessary. However, in such a case, the force when connecting the vehicle-side connector to the antenna-side connector 102c acts as a load on the solder portion that fixes the antenna-side connector 102c and the printed circuit board 102. Due to this, there is a possibility that problems such as poor connection between the antenna-side connector 102c and the printed circuit board 102 occur, which is not preferable in terms of the reliability of the antenna device 100. For this reason, conventionally, as described above, the antenna side connector 102c is often provided on the other end side of the lead wire having one end connected to the printed circuit board 102. On the other hand, the case 101 and the antenna 103 other than the lead wire 102b and the lead connector 102a cannot be omitted. Therefore, it has been difficult to reduce the number of parts.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an antenna device capable of reducing the number of components and a method for manufacturing the antenna device.

According to a first aspect of the present invention, in an antenna device mounted on a vehicle for performing predetermined wireless communication between a vehicle-side control device and a vehicle external device having a communication function, the antenna device is disposed in a vehicle interior. A case, an antenna provided in the case, a circuit forming member provided in the case and mounted with a predetermined electronic component and connected to the antenna, and connected to the circuit forming member and from the control device An antenna-side connector to which the pulled-out vehicle-side connector is connected, wherein the antenna-side connector and the case are integrally formed, and the antenna-side connector electrically connects the vehicle-side connector and the circuit forming member. A linear conductor having a connector terminal connected to the vehicle-side connector and a connection terminal connected to the circuit forming member. Each of the conductors is insert-molded with respect to the case, the antenna includes a magnetic body formed in a rod shape, and a coil wound around the magnetic body, and the case includes the magnetic body The case and the antenna-side connector are arranged in a straight line, and a first accommodation portion that can accommodate the antenna is formed on one side of the case. On the other hand, a second housing portion that can house the circuit forming member is formed in the other surface, which is the side surface opposite to the first housing portion, and each of the antenna-side connectors is formed in the second housing portion. A state in which a pair of connection terminals provided at both ends of a coil in the antenna accommodated in the connection terminal and the antenna accommodated in the first accommodating portion are respectively protruded, and a circuit forming member is inserted into each of the protruding connection terminals and both connection terminals. In the subject matter that it has to fix the circuit forming member on the second housing portion.

The gist of the invention according to claim 2 is that, in the antenna device according to claim 1 , the antenna and the circuit forming member are arranged so as to overlap each other .

According to a third aspect of the present invention, in an antenna device mounted on a vehicle for performing predetermined wireless communication between a vehicle-side control device and a vehicle external device having a communication function, the antenna device is disposed in a vehicle interior. A case, an antenna provided in the case, a circuit forming member provided in the case and mounted with a predetermined electronic component and connected to the antenna, and connected to the circuit forming member and from the control device An antenna-side connector to which the pulled-out vehicle-side connector is connected, wherein the antenna-side connector and the case are integrally formed, and the circuit forming member is a lead frame provided integrally with the case , so as to implement the electronic component on the lead frame, said antenna, and the magnetic material formed into a rod, is disposed around the magnetic body The case is formed in a cylindrical shape, and an opening is formed at one end of the case to accommodate the magnetic body, and the coil is wound around the outer peripheral surface of the case. The gist is that the bobbin portion to be integrally formed is formed .

The invention according to claim 4 is the antenna device according to claim 3 , wherein a part of the lead frame is plastically deformed to connect both ends of the coil and the lead frame. And

According to a fifth aspect of the present invention, in the antenna device according to the third or fourth aspect , a thermoplastic resin is used so that the antenna-side connector is exposed to the outside of the case to which the antenna and the lead frame are attached. The gist of the invention is that it is covered and sealed.

According to a sixth aspect of the present invention, in the method for manufacturing an antenna device according to any one of the third to fifth aspects, the first step of insert molding the lead frame into a case, and the insert molding. The present invention includes a second step of mounting electronic components on the lead frame and a third step of assembling the antenna to the case.

(Function)
According to the invention described in any one of claims 1 to 6, since the antenna-side connector and the case are integrally formed, the number of parts can be reduced. As a result, the assembly work efficiency of the antenna device is improved. Further, since the antenna-side connector and the case are integrally formed, the force when connecting the vehicle-side connector to the antenna-side connector is distributed to the case via the antenna-side connector. For this reason, the force at the time of connecting the said vehicle side connector to an antenna side connector does not act directly on the circuit formation member and the electronic component mounted in the said circuit formation member.

According to the invention described in claim 1, by insert molding the each conductor with respect to the case, there is no need to separately assemble each conductor with respect to the case.

Further, according to the invention described in claim 1, by arranging the to case and the antenna connector in a straight line, reducing the size in the width direction of the antenna device (the direction perpendicular to the axial direction of the case) be able to.
Furthermore, according to the first aspect of the present invention, it is possible to connect the antenna and the circuit forming member only by attaching them to the case, and no special wiring work is required. For this reason, adopting a configuration in which the antenna and the circuit forming member are assembled to the case from opposite sides greatly contributes to simplification of the connection structure between the two. Moreover, it contributes to the improvement of the assembly work efficiency of both members.

According to the invention described in claim 2, by arranging so as to superimpose the antenna and the circuit forming member, for example, unlike the case where to arrange side by side and a bar antenna and the circuit forming member horizontally, antenna The width of the device can be further saved.

According to the invention of claim 3, since the electronic component is mounted on to case a lead frame integrally provided with, for example, a printed circuit board for mounting the electronic components becomes unnecessary. For this reason, the number of parts can be further reduced. In addition, the work of attaching the printed circuit board on which the electronic component is mounted to the case becomes unnecessary, so that the assembly work efficiency of the antenna device is improved.

Further, according to the invention described in claim 3, since the bobbin for winding the coils are also case and integrally formed, can be further reduced the number of parts of the antenna device.

According to the invention described in claim 4 , both ends of the coil and the lead frame are connected by plastically deforming a part of the lead frame. Compared to the case where the lead frame and both ends of the coil are connected by, for example, solder (lead-based solder), it is preferable in terms of environmental protection.

According to the invention of claim 5, antenna and the lead frame are sealed by being covered with a thermoplastic resin. For this reason, the liquid tightness of the antenna and the lead frame is ensured. In some cases, the antenna device is disposed under the floor of a vehicle. In such a case, it is preferable to employ a waterproof structure as in the present invention.

According to the invention described in claim 6 , after the lead frame is insert-molded in the case, the electronic component is mounted on the lead frame. For this reason, the damage of the electronic component by the heat | fever at the time of insert molding is suppressed.

  According to the present invention, the number of parts of the antenna device can be reduced.

<First Embodiment>
<Outline of electronic key system>
Hereinafter, a first embodiment in which the present invention is embodied in an antenna device for a vehicle interior in an electronic key system of a vehicle will be described with reference to FIGS.

  As shown in FIG. 1, an electronic key system 11 mounted on a vehicle 10 includes a portable device 12 carried by a user, an outside transmitter 13, an outside antenna device 14, an in-vehicle transmitter 15, and an in-vehicle receiver. 16 and a control device 17 for controlling each part of the vehicle.

  The vehicle exterior transmitter 13 and the vehicle exterior antenna device 14 are provided in each doorknob of the vehicle 10 in pairs. The outside transmitter 13 is a request signal for requesting a response from the portable device 12 to the outside communication area E1 set around each door outside the passenger compartment when the vehicle is parked (that is, the door is locked without a passenger). Is transmitted via the antenna device 14 outside the vehicle compartment. When the user who has the portable device 12 enters the out-of-vehicle communication area E1, the portable device 12 transmits an ID signal including a portable device-side ID code unique to the portable device in response to the request signal. The ID signal from the portable device 12 is received by the vehicle interior receiver 16 and sent to the control device 17. The control device 17 performs predetermined reception processing (demodulation, etc.) by a built-in reception circuit (not shown). Then, the control device 17 collates the portable device side ID code included in the ID signal from the portable device 12 with the vehicle side ID code recorded in advance, and the both match to establish the communication outside the vehicle. When the door is unlocked, a locking / unlocking actuator (not shown) provided on the door is driven and controlled.

  The vehicle interior transmitter 15 and the vehicle interior receiver 16 are each provided in a console box or the like in the vehicle interior. The vehicle interior transmitter 15 transmits a request signal for requesting a response to the portable device 12 to the vehicle interior communication area E2 set, for example, around the driver's seat in the vehicle interior. As described above, when the user unlocking the door and holding the portable device 12 enters the vehicle interior communication area E2, the portable device 12 responds to the request signal and the portable device-side ID code unique to the portable device. An ID signal including The ID signal from the portable device 12 is received by the vehicle interior receiver 16 and sent to the control device 17. The control device 17 performs predetermined reception processing (demodulation, etc.) by a built-in reception circuit (not shown), and the portable device side ID code included in the ID signal from the portable device 12 and the vehicle recorded in advance in itself. The side ID code is collated, and when both are matched and the vehicle interior communication is established, the engine (not shown) is allowed to start.

<In-vehicle transmitter>
Next, the vehicle interior transmitter 15 will be described in detail. As shown in FIG. 2, the vehicle interior transmitter 15 includes a case 21, an antenna 22 accommodated in the case 21, and a printed board 23.

<Case>
As shown in FIGS. 2 and 3, the case 21 includes a rectangular parallelepiped case body 31, a U-shaped upper cover 32 attached to the case body 31, and a flat plate-like lower cover 33.

<Case body>
As shown in FIG. 2, the case body 31 is integrally formed of an insulating thermoplastic resin material, and includes a rectangular parallelepiped housing portion 41 that houses the antenna 22 and the printed circuit board 23, and the longitudinal direction of the housing portion 41. The connector part 42 provided in the edge part (left edge part in FIG. 2) is provided.

<Container>
As shown in FIG. 2, an antenna accommodating portion 43 is formed on the front surface side (upper surface side in FIG. 2) of the accommodating portion 41 over the entire length, and the connector portion 42 on the back surface side (lower surface side in FIG. 2). A substrate housing portion 44 is formed in an opening over the one third of the entire length of the housing portion 41. The antenna accommodating portion 43 is capable of accommodating an antenna 22 described later, and the substrate accommodating portion 44 is provided so as to accommodate a printed circuit board 23 described later. In the present embodiment, the front surface of the housing portion 41 corresponds to one side of the case in the present invention, and the back surface of the housing portion 41 corresponds to the other surface of the case in the present invention.

  As shown in FIGS. 2 and 4, the antenna housing portion 43 and the substrate housing portion 44 are partitioned by a partition wall 45, and the partition wall 45 separates the bottom wall of the antenna housing portion 43 and the bottom wall of the substrate housing portion 44, respectively. Combined use. In the partition wall 45, a pair of insertion holes 46 and 46 (only one is shown in FIG. 2) are formed at a predetermined interval in the width direction of the housing portion 41 at a portion corresponding to the substrate housing portion 44. (See FIG. 4). Both insertion holes 46, 46 are arranged so as to be offset to the opposite side of the connector part 42 in the board housing part 44. The antenna accommodating portion 43 and the substrate accommodating portion 44 communicate with each other through both insertion holes 46 and 46.

  As shown in FIG. 4, a pair of engaging protrusions 47, 47 are respectively provided on two long side surfaces (only one is shown in FIG. 4) located on the opposite sides of the accommodating portion 41. Are formed at predetermined intervals in the longitudinal direction. A plurality of engagement holes 48 are formed in the side wall of the substrate housing portion 44. That is, two engagement holes 48 are formed in both long side walls facing each other in the width direction of the housing portion 41, and the connector portion 42 of both short side walls facing each other in the longitudinal direction of the housing portion 41. A single engagement hole 48 is formed in the short side wall away from the first side wall.

  A pair of rail members 49 and 49 for fixing the vehicle interior transmitter 15 to the vehicle 10 are provided on the bottom surface of the housing portion 41 (that is, the portion exposed to the outside on the outer surface of the partition wall 45). It is formed at predetermined intervals in the direction. Both rail members 49, 49 have an inverted L-shaped cross section, and guide rails 49a, 49a (see FIG. 2; only one is shown in the figure) by the rail members 49, 49 and the bottom surface of the accommodating portion 41. Is formed). Both rail members 49, 49 are arranged so that the opening sides of both guide grooves 49a, 49a are opposed to each other, and between the rail members 49, 49 (precisely, between both guide grooves 49a, 49a), the vehicle side The antenna mounting portion (not shown) provided in the can be fitted. One end of each rail member 49, 49 is connected to the side wall of the substrate housing portion 44, and the other end side extends to the middle of the bottom surface of the housing portion 41.

<Connector part>
As shown in FIGS. 2 and 3, the connector portion 42 includes a connector housing 50 and a pair of linear conductors 51, 51. The connector housing 50 has a rectangular parallelepiped shape with one side surface (side surface opposite to the housing portion 41) opened, and is connected to the housing portion 41 via a connecting portion 52 (see FIG. 2). Both conductors 51, 51 are formed in a step-like manner and are insert-molded in the case body 31. One end of each of the conductors 51, 51 protrudes from the inner bottom surface of the connector housing 50 into the connector housing 50, and the protruding portion serves as the connector terminals 51 a, 51 a, while the other end similarly includes the connecting portion 52 and the partition wall 45. The projecting portion protrudes from the inner bottom surface of the substrate housing portion 44, and the projecting portions serve as connection terminals 51 b and 51 b for the printed board 23. Both connection terminals 51 b and 51 b are arranged so as to be offset toward the connector portion 42 side on the inner bottom surface of the substrate housing portion 44. The connector 42 is connected to a vehicle-side connector C (shown by a two-dot chain line in FIG. 2) having one end connected to the other end of the lead wire connected to the control device 17.

<Antenna>
As shown in FIG. 2, the antenna 22 is accommodated in the antenna accommodating portion 43. The antenna 22 is a so-called bar antenna including an iron core 53 formed in a square bar shape by a magnetic material such as ferrite, a bobbin 54 fixed to the iron core 53 in an inserted state, and a coil 55 attached to the bobbin 54. The iron core 53 and the bobbin 54 are fixed with an adhesive. Square annular coil fixing members 54a and 54a are formed at both ends of the bobbin 54, and the coil 55 is disposed between the coil fixing members 54a and 54a. Both ends of the coil 55 abut against the coil fixing members 54a and 54a, respectively, so that the movement of the coil 55 in the axial direction of the bobbin 54 is restricted. The coil 55 is formed by winding a conductive metal wire in a spiral shape. Both ends of the metal wire constituting the coil 55 protrude from the surface of one coil fixing member 54a, and the protruding both ends serve as connection terminals 55a and 55a for the printed circuit board 23. Both connection terminals 55a, 55a are spaced apart in the width direction of the accommodating portion 41, and the separation distance is substantially the same as the arrangement interval of the two insertion holes 46, 46 formed in the inner bottom surface of the substrate accommodating portion 44. Yes. Further, when the antenna 22 is accommodated in the antenna accommodating portion 43, both the insertion holes 46, 46 and the both connection terminals 55a, 55a are arranged so that the both connection terminals 55a, 55a can be inserted into the both insertion holes 46, 46. Each arrangement is set. The antenna 22 is housed in the antenna housing portion 43 with both connection terminals 55a and 55a being inserted through the both insertion holes 46 and 46. In this state, both connection terminals 55a and 55a protrude into the board housing portion 44. Yes.

<Printed circuit board>
A printed circuit board 23 is accommodated in the substrate accommodating portion 44. The printed circuit board 23 is formed in a rectangular flat plate shape, and the surface of the printed circuit board 23 includes a capacitor that forms an RC resonance circuit together with the coil 55, and various resistors such as a resistor for adjusting the range of the vehicle interior communication area E2. The electronic component R is mounted. The electronic components R are connected by printed wiring disposed on the surface of the printed board 23.

  Four insertion holes 56 are formed in the printed circuit board 23. Each insertion hole 56 is disposed corresponding to the protruding positions of the connection terminals 51 b and 51 b in both the conductors 51 and 51 protruding into the board housing portion 44 and the connection terminals 55 a and 55 a in the coil 55. Both connection terminals 51b and 51b and both connection terminals 55a and 55a are inserted in the respective insertion holes 56 of the printed circuit board 23 accommodated in the substrate accommodating portion 44. Both connection terminals 51b, 51b and both connection terminals 55a, 55a are connected to the electronic component R via the printed wiring on the printed circuit board 23 by solder (not shown) while being inserted through the insertion holes 56. . The electronic component R is connected to the control device 17 (more precisely, a transmission circuit (not shown) incorporated in the control device 17) via both conductors 51 and 51 and the vehicle-side connector C. The request signal generated by the control device 17 (more precisely, the transmission circuit) is transmitted via the antenna 22.

<Upper cover>
As described above, the upper cover 32 is attached to the antenna housing portion 43 in which the antenna 22 is housed, and thereby the opening of the antenna housing portion 43 is closed. As shown in FIG. 4, the upper cover 32 is formed of an insulating thermoplastic resin material, and includes a rectangular top plate 61 and a U-shaped side wall 62. The side wall 62 includes a pair of long side walls 62a and 62a facing each other and a single short side wall 62b connecting between one end portions of the long side walls 62a and 62a. A pair of engagement holes 63, 63 are formed in the long side walls 62 a, 62 a at a predetermined interval in the longitudinal direction of the upper cover 32, and each engagement hole 63 corresponds to each engagement protrusion of the housing portion 41. 47 can be engaged. The upper cover 32 is externally fitted to the accommodation portion 41 so as to cover the opening of the accommodation portion 41, and the engagement projections 47 are engaged with the engagement holes 63 from the inside, whereby the upper cover 32 is engaged. Is fixed to the accommodating portion 41.

<Lower cover>
As shown in FIG. 4, a lower cover 33 is attached to the opening of the board housing portion 44 in which the printed circuit board 23 is housed, so that the opening of the board housing portion 44 is closed. The lower cover 33 is formed in a rectangular flat plate shape from an insulating thermoplastic resin material. A pair of engaging protrusions 64 and 64 are respectively formed on the long side edges of the lower cover 33 that are opposite to each other, and one of the short side edges orthogonal to the both long side edges. A single engaging protrusion 64 is formed at the center. Each engagement protrusion 64 can be engaged with each engagement hole 48 of the substrate housing portion 44. The lower cover 33 is attached to the opening of the substrate housing portion 44 in an internally fitted state, and the lower cover 33 is fixed to the housing portion 41 by the engagement protrusions 64 engaging with the engagement holes 48 from the inside. Has been. In this state, the surface of the lower cover and the opening end surface of the substrate housing portion 44 are flush with each other (see FIGS. 2 and 3).

  In the present embodiment, the portable device 12 constitutes a vehicle external device of the present invention. The vehicle interior transmitter 15 constitutes the antenna device of the present invention. The printed circuit board 23 constitutes a circuit forming member of the present invention, and the connector portion 42 constitutes an antenna side connector of the present invention. Moreover, the antenna accommodating part 43 comprises the 1st accommodating part of this invention, and the board | substrate accommodating part 44 comprises the 2nd accommodating part of this invention. Furthermore, the iron core 53 constitutes the magnetic body of the present invention.

<Manufacturing method of vehicle interior transmitter>
Next, an assembly procedure of the vehicle interior transmitter 15 configured as described above will be described. The case body 31 in which both conductors 51 and 51 are insert-molded is formed in advance by injection molding or the like. The antenna 22 including the iron core 53, the bobbin 54, and the coil 55 is also assembled in advance. Further, various electronic components constituting the tuner circuit are mounted in advance on the printed circuit board 23.

  Under such a premise, when assembling the vehicle interior transmitter 15, the antenna 22 is first accommodated in the antenna accommodating portion 43. At that time, both connection terminals 55a and 55a of the coil 55 are inserted into both insertion holes 46 and 46 formed in the bottom wall (that is, the partition wall 45) of the antenna accommodating portion 43, and both the connection terminals 55a and 55a are inserted into the substrate accommodating portion. 44 to project into.

  Next, the printed circuit board 23 is accommodated in the substrate accommodating portion 44. At that time, the connection terminals 51 b and 51 b of both the conductors 51 and 51 and the connection terminals 55 a and 55 a of the coil 55 projecting into the board housing portion 44 are respectively inserted into the insertion holes 56 of the printed board 23.

  Then, the connection terminals 51b and 51b of both the conductors 51 and 51 are connected to the printed circuit board 23 and the connection terminals 55a and 55a of the coil 55 and the printed circuit board 23 by solder (solder mainly composed of lead). As described above, after the antenna 22 is accommodated in the antenna accommodating portion 43, the antenna 22 and the printed substrate 23 can be connected only by accommodating the printed circuit board 23 in the substrate accommodating portion 44. It is.

  Finally, the upper cover 32 and the lower cover 33 are attached to the case main body 31, respectively. In other words, the engaging protrusions 47 of the accommodating portion 41 are engaged with the engaging holes 63 of the long side walls 62a and 62a while the accommodating portion 41 enters between the long side walls 62a and 62a of the upper cover 32. Thereby, the upper cover 32 is fixed to the accommodating portion 41. Further, the engagement protrusions 64 of the lower cover 33 are engaged with the engagement holes 48 of the substrate housing portion 44 while the lower cover 33 is inserted into the opening portion of the substrate housing portion 44. Thereby, the lower cover 33 is fixed to the accommodating portion 41. The cover attaching work process for attaching the upper cover 32 to the case body 31 includes an antenna housing work process for housing the antenna 22 in the antenna housing section 43 and a board housing work process for housing the printed circuit board 23 in the board housing section 44. It may be performed in between.

  This completes the assembly work of the vehicle interior transmitter 15. The vehicle interior transmitter 15 is attached to the antenna mounting portion provided on the vehicle side via both rail members 49. And if the said vehicle side connector C provided in the other end of the lead wire which one end was connected to the connector part 42 of the vehicle interior transmitter 15 is connected to the vehicle 10 of the vehicle interior transmitter 15 Installation work is completed. Here, since both the conductors 51 and 51 are united with the case main body 31 by insert molding, the force which acts on the connector part 42 at the time of connecting the said vehicle side connector C to the connector part 42 is applied to the printed circuit board 23. It does not act directly.

<Effect of embodiment>
Therefore, according to the present embodiment, the following effects can be obtained.
(1) The housing part 41 for housing the antenna 22 and the printed circuit board 23 and the connector part 42 to which the vehicle-side connector C is connected are integrally formed. For this reason, unlike the case where the connector part 42 is comprised by another member as an antenna side connector, the number of parts of the vehicle interior transmitter 15 can be reduced. Further, as the number of parts is reduced, the assembly work efficiency of the vehicle interior transmitter 15 is improved, and as a result, the productivity of the vehicle interior transmitter 15 is also improved.

  (2) Both conductors 51, 51 of the connector portion 42 are insert-molded into the case body 31. For this reason, the force at the time of connecting the said vehicle side connector C to the connector part 42 does not apply to the printed circuit board 23 and the electronic component mounted in it (the soldering site | part with respect to those printed circuit boards 23). Therefore, damage to the printed circuit board 23 associated with the connection work of the vehicle side connector C is avoided.

  (3) Also, by forming both conductors 51 and 51 respectively, both connector terminals 51a and 51a connected to the vehicle-side connector C and both connection terminals 51b and 51b connected to the printed circuit board 23 are respectively provided. It was made to form. For this reason, when connecting both the connector terminals 51a and 51a of the connector part 42 and the printed circuit board 23 via the lead wire provided separately, the said lead wire becomes unnecessary and it contributes to reduction of a number of parts.

  (4) The connector portion 42 is provided at the end of the housing portion 41 in the longitudinal direction. That is, the accommodating part 41 and the connector part 42 are arrange | positioned at linear form. For this reason, the increase in the width dimension of the vehicle interior transmitter 15 can be suppressed. For example, when the connector part 42 is protruded from the long side surface of the housing part 41, the width dimension is increased as compared with the vehicle interior transmitter 15 in the present embodiment. From the viewpoint of the degree of freedom of arrangement of the vehicle interior transmitter 15 in the vehicle interior, it is preferable to suppress the width dimension of the vehicle interior transmitter 15 as much as possible.

  (5) The antenna 22 is arranged from the front surface side of the housing part 41 and the printed circuit board 23 is also superposed from the back surface side so as to be arranged and fixed on the housing part 41. That is, the antenna housing part 43 and the board housing part 44 are respectively provided in the case body 31 so that the mounting direction of the antenna 22 and the mounting direction of the printed circuit board 23 are opposite to each other. Then, the antenna 22 is accommodated in the antenna accommodating portion 43 which is the surface side of the accommodating portion 41, so that both connection terminals 55 a and 55 a of the coil 55 constituting the antenna 22 can be projected into the substrate accommodating portion 44. The insertion holes 46, 46 are formed in the partition wall 45. In addition, four insertion holes 56 are formed in the printed circuit board 23 so that the connection terminals 55a and 55a projecting into the substrate housing portion 44 and the connection terminals 51b and 51b of the conductors 51 and 51 can be inserted. The printed circuit board 23 is fixed in a state in which the connection terminals 55a and 55a and the connection terminals 51b and 51b protruding into the substrate housing portion 44 are inserted into the insertion holes 56, respectively. For this reason, the assembly work efficiency with respect to the case main body 31 of the antenna 22 and the printed circuit board 23 and the connection work efficiency of the coil 55 of the antenna 22 and the printed circuit board 23 can each be improved.

  Incidentally, when the antenna housing portion 43 and the substrate housing portion 44 are not opposite to each other, precisely, when the substrate housing portion 44 is not provided at a position corresponding to both the connection terminals 55a and 55a, both ends of the coil 55 are connected. It is necessary to separately connect the printed circuit board 23 with a lead wire or the like, and the connection work efficiency between the coil 55 of the antenna 22 and the printed circuit board 23 may be reduced. As described above, in the vehicle interior transmitter 15 of the present embodiment, the connection relationship between the connection terminals 51b and 51b of the conductors 51 and 51, the connection terminals 55a and 55a of the antenna 22, and the printed circuit board 23 is This greatly contributes to improving the assembly work efficiency of the indoor transmitter 15.

  (6) The antenna 22 and the printed circuit board 23 are accommodated in the accommodating portion 41 so as to overlap each other. For this reason, for example, unlike the case where the antenna 22 and the printed circuit board 23 are arranged side by side, the width dimension of the vehicle interior transmitter 15 can be reduced.

  (7) Since the transmission circuit of the vehicle interior transmitter 15 is incorporated in the control device 17, the number of electronic components mounted on the printed circuit board 23 can be reduced. As the number of electronic components to be mounted on the printed circuit board 23 is reduced, the number of soldering work steps for the electronic components to the printed circuit board 23 is reduced, which in turn contributes to the reduction of the manufacturing time of the printed circuit board 23. Further, the printed circuit board 23 can be downsized by reducing the number of electronic components.

  (8) The upper cover 32 is configured to have a box shape from the rectangular top plate 61 and the U-shaped side wall 62. For this reason, unlike the case where the upper cover 32 is formed in a plate shape by omitting the side wall 62, for example, the rigidity of the upper cover 32 can be ensured. When only the top plate 61 is used, it is easy to bend because of its length.

<Second Embodiment>
Next, a second embodiment of the present invention will be described with reference to FIGS. 5 (a) and 5 (b) to FIG. This embodiment is different from the first embodiment in the configuration of a vehicle interior transmitter that constitutes the electronic key system of the vehicle. Therefore, the same member numbers as those in the first embodiment are denoted by the same member numbers, and detailed description thereof is omitted.

  As shown in FIGS. 5A and 5B, the vehicle interior transmitter 71 includes a base member 72 that is integrally formed in a square bar shape from a thermoplastic resin material having insulating properties and heat resistance. As shown in FIG. 5A, a rectangular parallelepiped connector 73 is provided at one end of the base member 72, while the connector 73 is opposite to the connector 73 as shown in FIG. At the other end, an iron core accommodating portion 74 is opened. The connector 73 can be connected to a vehicle-side connector C indicated by a two-dot chain line in FIG. A bobbin portion 75 is provided on the outer peripheral surface of the intermediate portion of the base member 72, and a circuit mounting portion 76 is provided between the bobbin portion 75 and the connector portion 73. A square annular flange 77 is formed between the circuit mounting portion 76 and the connector portion 73.

An iron core 78 formed in a square bar shape by a magnetic material such as ferrite is inserted into the iron core accommodating portion 74. The iron core 78 and the base member 72 are not particularly fixed.
The bobbin portion 75 includes a pair of hook-shaped coil fixing members 79 and 79. The two coil fixing members 79 and 79 are separated by a predetermined distance in the axial direction of the base member 72, and a coil 80 is mounted between the two coil fixing members 79 and 79 in the bobbin portion 75. The coil 80 is formed by winding a conductive metal wire in a spiral shape. The movement of the coil 80 in the axial direction of the base member 72 is restricted when both ends of the coil 80 are in contact with the two coil fixing members 79, 79.

  A lead frame 81 is insert-molded in the circuit mounting portion 76 (precisely, the upper surface in FIGS. 5A and 5B). The lead frame 81 is integrally formed of a conductive metal material so as to form a predetermined wiring pattern. The lead frame 81 includes a pair of connector terminals 82, 82, a plurality of inner leads 83, and a pair of fusings. Parts 84 and 84 are provided. Both the connector terminals 82, 82 and the inner leads 83 extend in a direction along the axial direction of the base member 72. Both connector terminals 82, 82 pass through the flange portion 77 and protrude into the connector portion 73. Each inner lead 83 is connected to a capacitor constituting an RC resonance circuit together with the coil 80 and various electronic components R such as a resistor for adjusting the range of the vehicle interior communication area E2 by soldering. On the other hand, both the fusing portions 84, 84 extend in a direction orthogonal to both the connector terminals 82, 82 and each inner lead 83 (width direction of the base member 72). Both end portions of the coil 80 are connected to both the fusing portions 84 and 84 by folding back their tip portions.

  In the base member 72 in which the iron core 78, the coil 80, the lead frame 81, and various electronic components R are assembled, the entire portion of the portion opposite to the connector portion 73 with the flange portion 77 as a boundary is shown in FIG. ) And (b) are sealed by a mold body 85 indicated by a two-dot chain line. The molded body 85 is formed in a rectangular parallelepiped shape whose outer peripheral surface is flush with the outer peripheral surface of the flange 77 by an insulating thermoplastic resin material. In this way, the base member 72 is sealed by the mold body 85, whereby the iron core 78 is fixed to the base member 72 so as not to drop off. Further, the liquid tightness (water tightness) of the iron core 78, the coil 80, the lead frame 81, and the various electronic components R is ensured.

  In this embodiment, the vehicle interior transmitter 71 constitutes the antenna device of the present invention, and the connector portion 73 constitutes the antenna side connector of the present invention. The base member 72 constitutes the case of the present invention. The iron core 78 and the coil 80 constitute an antenna of the present invention, and the iron core 78 further constitutes a magnetic body. Furthermore, the iron core accommodating part 74 constitutes a magnetic substance accommodating part, and the fusing part 84 constitutes a part of the lead frame.

<Manufacturing method of vehicle interior transmitter>
Next, a method for manufacturing the vehicle interior transmitter 71 configured as described above will be described. The vehicle interior transmitter 71 is manufactured through a lead frame manufacturing process, a primary molding process, a trimming process, a component mounting process, and a secondary molding process.

<Lead frame manufacturing process>
As shown in FIG. 6, first, in the lead frame manufacturing process, a lead frame 91 having a predetermined wiring pattern that is the original shape of the lead frame 81 is formed. The lead frame 91 is formed by punching a flat plate (thin plate) made of a conductive metal material using, for example, a press. The lead frame 91 includes a square annular side frame 92, a pair of connector terminals 82 and 82 projecting outward from the side frame 92, a plurality of inner leads 83 disposed in the side frame 92, and a pair of fusings. A plurality of connecting portions 93 for connecting the portions 84 and 84 and the inner lead 83 and the side frame 92 are provided. Both the connector terminals 82 and 82 and the inner lead 83 extend in the same direction (left and right direction in FIG. 6), and the fusing portions 84 and 84 are orthogonal to both the connector terminals 82 and 82 and the inner lead 83 ( It is extended in the vertical direction in FIG. The base end portions of both the fusing portions 84 and 84 are connected to the inner lead 83 and the connecting portion 93, respectively, and the distal end portions are also free ends. Next, as shown in FIG. 7, the leading ends of the fusing portions 84 and 84 of the lead frame 91 are folded up to the front side (the front side in FIG. 7) by a bending process with a press machine.

<Primary molding process>
Next, as shown in FIG. 8, in the primary molding step, the base member 72 is insert-molded using the lead frame 91 that has undergone the fusing portion bending step as an insert product. That is, after inserting a lead frame 91 as an insert into a mold of an injection molding machine (not shown), a predetermined thermoplastic resin material is injected into the mold and the lead frame 91 is melted. Wrap with resin material and solidify. As a result, a primary molded product 96 in which the lead frame 91 and the base member 72 are integrated is formed.

  In addition, the base member 72 is integrally formed with both coil fixing members 79 and 79 constituting the connector portion 73, the iron core accommodating portion 74, the bobbin portion 75, the circuit mounting portion 76, the flange portion 77, and the bobbin portion 75. A lead frame 91 is insert-molded in the circuit mounting portion 76, and both connector terminals 82 and 82 protrude into the connector portion 73 of the base member 72. This primary molding step constitutes the first step of the present invention.

<Trimming process>
Next, the process proceeds to a trimming process for trimming the lead frame 91 of the primary molded product 96. As shown in FIG. 9, in the trimming process, in the primary molded product 96, an excess portion of the lead frame 91, that is, a portion protruding to the side of the base member 72 in the side frame 92 and the connecting portion 93 is trimmed. It is removed (cut) by (not shown). As a result, the lead frame 81 is formed on the circuit mounting portion 76 of the base member 72.

<Component mounting process>
Thereafter, the process proceeds to a component mounting process in which various components such as the electronic component R, the iron core 78, and the coil 80 are attached to the primary molded product 96. This component mounting process includes an electronic component mounting process for attaching the electronic component R to the primary molded product 96, a coil winding process for winding the coil 80, a fusing process for connecting both ends of the coil 80 to the lead frame 81, and Similarly, an iron core insertion step of inserting the iron core 78 is included.

<Electronic component mounting process>
As shown in FIG. 10, in the electronic component mounting step, first, the electronic component R is placed at a predetermined attachment site in the lead frame 81 by an automatic mounting machine. The electronic component R is connected to the lead frame 81 with solder. As a soldering method, for example, reflow soldering using a reflow apparatus is employed, and so-called lead-free solder is used as a bonding material between the electronic component R and the lead frame 81. Incidentally, the reflow soldering is a method of soldering the electrode portion of the electronic component R by applying heat to the substrate (in this embodiment, the lead frame 81) after applying the kneaded cream solder. The lead-free solder is not a conventional solder containing lead as a main component but a solder containing no lead. Currently (at the time of filing this application), lead-free solder is mainly based on tin-silver eutectic and has a higher melting point than conventional solder containing lead. This electronic component mounting step constitutes the second step of the present invention.

<Coil winding process>
Next, as shown in FIG. 11, in the coil winding step, a conductive metal wire constituting the coil 80 is wound around the bobbin portion 75 of the base member 72 a predetermined number of times by a coil winding machine (not shown). . As a result, the coil 80 is formed in the bobbin portion 75. In the present embodiment, a second polyester copper wire is employed as the metal wire constituting the coil 80. The second polyester copper wire is an enameled wire obtained by baking an insulating varnish mainly composed of a second polyester resin on a copper wire.

<Fusing process>
Next, as shown in FIG. 11, in the fusing process, a fusing unit (not shown) is used to plastically deform the fusing parts 84 and 84 that are part of the lead frame 81 at both ends of the coil 80. Connect by More specifically, the both ends of the metal wire constituting the coil 80 are sandwiched by folding both the fusing portions 84 and 84 toward the lead frame 81. At this time, by applying electricity to the fusing portions 84 and 84 (terminals) and applying pressure while heating, the coating of the coil 80 (in this embodiment, the insulating varnish mainly composed of the second polyester resin) is melted to form copper. The wire is exposed, and the copper wire and both fusing portions 84 and 84 are welded.

<Iron core insertion process>
Then, as shown in FIG. 11, in the iron core insertion step, the iron core 78 is inserted into the iron core housing portion 74 (see FIG. 5B) of the base member 72 by an automatic mounting machine (not shown). At this time, the iron core 78 and the base member 72 are not fixed. In addition, the said coil winding process, the said fusing process, and the said iron core insertion process comprise the 3rd process of this invention.

<Secondary molding process>
When the component mounting process is completed, the process proceeds to the secondary molding process. As shown in FIG. 12, in the secondary molding process, the molded body 85 is insert-molded using the base member 72 on which the lead frame 81, various electronic components R, the coil 80, and the iron core 78 are mounted as inserts. That is, after a base member 72 as an insert product is loaded into a mold of an injection molding machine (not shown), a predetermined thermoplastic resin material is injected into a predetermined mold different from the above, and the base member 72 is injected. Is wrapped in the molten thermoplastic resin material and solidified. As a result, a vehicle interior transmitter 71 is formed as a secondary molded product in which the base member 72 and the mold body 85 are integrated.

  Since the base member 72 is sealed by the mold body 85, the iron core 78 is fixed to the base member 72 so as not to drop off, and the iron core 78, the coil 80, the lead frame 81, and liquids of various electronic components R are fixed. Denseness is ensured. The mold body 85 is formed so as to cover the entire portion of the base member 72 opposite to the connector portion 73 with the flange portion 77 as a boundary, and to expose the connector portion 73 to the outside. The mold body 85 is formed in a rectangular parallelepiped shape whose outer peripheral surface is flush with the outer peripheral surface of the flange portion 77.

  Further, a thinly-filled portion 94 is formed in the back surface side of the mold body 85 and a pair of rail members 49 and 49 are formed so as to be continuous with the side wall of the thin-walled portion 94. By forming the thin-walled portion 94, the thickness of the mold body 85 is made as thin as possible, thereby suppressing the occurrence of sink marks during the injection molding of the mold body 85. By the way, sink marks are the warpage of the surface that occurs when the molten thermoplastic resin material is injected into the mold of an injection molding machine to mold the molded body 85 and the molten thermoplastic resin material shrinks when cooled. Etc.

This completes the production of the vehicle interior transmitter 71. The appearance of the vehicle interior transmitter 71 is substantially the same as that of the vehicle interior transmitter 15 in the first embodiment.
<Effect of embodiment>
Therefore, according to the present embodiment, the following effects can be obtained.

  (1) The connector part 73 and the bobbin part 75 are integrally formed on the base member 72. For this reason, unlike the case where the connector part 73 and the bobbin part 75 are each comprised by a separate member, the number of parts of the vehicle interior transmitter 71 can be reduced. Further, as the number of parts is reduced, the assembly work efficiency of the vehicle interior transmitter 71 is improved, and consequently the productivity of the vehicle interior transmitter 71 is also improved.

  (2) The lead frame 81 is insert-molded on the base member 72 by injection molding, and various electronic components R are mounted on the lead frame 81. For this reason, unlike the case where the printed circuit board on which these electronic components R are mounted is separately assembled in the vehicle interior transmitter 71, the printed circuit board is not necessary, and the number of components can be further reduced. Therefore, the productivity of the vehicle interior transmitter 71 can be further improved.

  (3) Since it is not necessary to mount the electronic component R on, for example, a printed circuit board and solder the mounted printed circuit board to the base member 72, so-called lead-free solder can be used as a bonding material for the electronic component R. it can. Using lead-free solder contributes to environmental protection.

  Since lead-free solder has a higher melting point than conventional solder containing lead and is difficult to solder, the reflow soldering method is generally employed when joining with lead-free solder. However, when the printed circuit board is soldered later, it may be difficult to adopt the reflow soldering method. For example, in the first embodiment, the connection terminals 51b and 51b of the two conductors 51 and 51 and the printed circuit board 23, the connection terminals 55a and 55a of the coil 55, and the printed circuit board 23 need to be soldered later. In this case, since the connecting terminals 51b and 51b and the connecting terminals 55a and 55a are inserted into the four insertion holes 56 of the printed circuit board 23 and then the soldering process is performed, the cream solder cannot be applied first. For this reason, it is difficult to adopt the reflow soldering method, and for example, joining with soldering solder is unavoidable. In the present embodiment, since the electronic component R is surface-mounted on the lead frame 81, a member corresponding to the printed circuit board 23 is not necessary, and a reflow soldering method can be employed.

  (4) Both connector terminals 82 and 82 are formed integrally with the lead frame 81. Then, when the base member 72 is formed by injection molding, the lead frame 81 (more precisely, the lead frame 91) is inserted into the insert product so that both the connector terminals 82 and 82 protrude to predetermined positions in the connector portion 73. The base member 72 is insert-molded. For this reason, unlike the case where both connector terminals 82 and 82 are configured as separate members and each of them is insert-molded into the base member 72, the number of parts of the vehicle interior transmitter 71 can be further reduced. As a result, the productivity of the vehicle interior transmitter 71 can be further improved.

  (5) The base member 72 incorporating the iron core 78, the coil 80, the lead frame 81, and various electronic components R is used as an insert, and the base member 72 is covered with the mold body 85 by injection molding. The mold body 85 is used to seal the iron core 78, the coil 80, the lead frame 81, and various electronic components R. For this reason, the liquid tightness (watertightness) of the iron core 78, the coil 80, the lead frame 81, and the various electronic components R is ensured. Since the molding body 85 is also formed by an injection molding machine or the like, the productivity of the vehicle interior transmitter 71 is not impaired.

  The vehicle interior transmitter 71 may also be arranged near the ground such as under the seat in the vehicle. In such a case, it is desirable to provide a waterproof structure. In particular, if the mold body 85 is formed by injection molding as in this embodiment, a waterproof structure can be easily obtained.

  (6) The iron core 78 is fixed to the base member 72 so as not to drop off by being covered with the mold body 85 while being inserted into the iron core accommodating portion 74 of the base member 72. For this reason, fixing work such as adhesion of the iron core 78 to the base member 72 becomes unnecessary, which contributes to the improvement of the productivity of the vehicle interior transmitter 71.

  (7) The manufacturing process of the vehicle interior transmitter 71, that is, the lead frame manufacturing process, the primary molding process, the component mounting process, and the secondary molding process are all automated. For this reason, the productivity of the vehicle interior transmitter 71 is greatly improved.

  (8) Since both the connector terminals 82 and 82 are formed integrally with the lead frame 81, the connecting operation of both the connection terminals 51b and 51b of the connector portion 42 and the printed circuit board 23 by soldering in the first embodiment is performed. Corresponding work becomes unnecessary. Further, both ends of the metal wire constituting the coil 80 are sandwiched by folding both the fusing portions 84 and 84 toward the lead frame 81, thereby connecting the both ends of the coil 80 and the lead frame 81. . This eliminates the need for soldering between the connection terminals 55a and 55a of the coil 55 and the printed circuit board 23 in the first embodiment. Therefore, the soldering part in the vehicle interior transmitter 71 can be reduced.

  (9) After the lead frame 81 is insert-molded into the base member 72, the electronic component R is mounted on the lead frame 81. For this reason, damage to the electronic component R due to heat during injection molding is suppressed.

<Another embodiment>
In addition, you may implement both the said embodiment as follows.
In the second embodiment, the base member 72 incorporating the iron core 78, the coil 80, the lead frame 81, and various electronic components R is used as an insert, and the base member 72 is sealed with the mold body 85 by injection molding. Although such waterproofness is ensured, it may be as follows. That is, a rectangular cylindrical case (not shown) having an open end that can accommodate the base member 72 is provided. Then, the case is attached so that the opening edge thereof is in contact with the side surface of the flange portion 77 opposite to the connector portion 73, and packing (not shown) is provided between the opening edge of the case and the flange portion 77. . Thereby, the liquid-tightness (waterproofness) between the said case and the collar part 77 is ensured. In addition, by performing potting with the case attached to the base member 72, liquid tightness (waterproofness) between the case and the collar portion 77 may be secured. In this case, the packing is not necessary. Incidentally, the potting process refers to a process of coating a material (in this case, the base member 72 to which the case is attached) with urethane resin or the like. Further, even if the opening edge of the case and the flange portion 77 are heat-welded, the liquid tightness between the case and the flange portion 77 is ensured.

  In the first and second embodiments, the present invention is embodied in the vehicle interior transmitters 15 and 71 in the electronic key system, but may be embodied in the vehicle exterior transmitter 13 and the vehicle interior receiver 16. . When the transmitter 13 is embodied in the vehicle exterior transmitter 13, the vehicle exterior antenna device 14 can be omitted.

<Another technical idea>
In an antenna device mounted on a vehicle for performing predetermined wireless communication with a portable device, a base member, an antenna attached to the base member, and a predetermined electronic component attached to the base member A lead frame mounted and connected to the antenna; and an antenna side connector connected to the lead frame and connected to a vehicle side connector from the control device; and the antenna side connector and the case are integrated. An antenna device to be formed.

- the third step includes a coil winding step of winding the coil to the case, including A and fusing step of connecting both ends of the coil to the lead frame by plastically deforming a part of said lead frame A method for manufacturing an antenna device.

· The antenna and the case in which the lead frame is mounted, so that the connector portion is exposed to the outside, a manufacturing method of antenna device having a fourth step of sealing coated with a thermoplastic resin. This fourth step corresponds to the secondary forming step in the second embodiment.

The schematic plan view of the vehicle for demonstrating the outline | summary of the electronic key system in 1st Embodiment. Sectional drawing of an antenna device. The perspective view of an antenna device. The exploded perspective view of an antenna device. (A), (b) is a schematic perspective view of the antenna device in 2nd Embodiment. The top view of the lead frame which similarly shows the manufacturing process of an antenna device. The top view of the lead frame which similarly shows the manufacturing process of an antenna device. The top view of the 1st molded object which similarly shows the manufacturing process of an antenna device. The top view of the 1st molded object after the trimming similarly showing the manufacturing process of an antenna device. The top view of the 1st molded object which mounted the electronic component in the lead frame which similarly shows the manufacturing process of an antenna device. The top view of the 1st molded object which similarly shows attachment of a coil and an iron core to the 1st molded object. The top view of the final molded product which resin-molded the 1st molded object similarly. The exploded perspective view of the conventional antenna device.

Explanation of symbols

10 ... vehicle, 12 ... mobile device (vehicle external device),
15, 71 ... Car interior transmitter (antenna device), 16 ... Car interior receiver,
17 ... Control device, 21 ... Case, 22 ... Antenna,
23 ... Printed circuit board constituting the circuit forming member,
42, 73 ... Connector portion (antenna side connector), 43 ... Antenna accommodating portion (first accommodating portion), 44 ... Substrate accommodating portion (second accommodating portion), 51 ... Conductor, 51a, 82 ... Connector terminal,
51b ... connection terminal (connection terminal of antenna side connector), 53 ... iron core (magnetic material),
55 ... Coil, 55a ... Connection terminal of coil, 72 ... Base member (case),
74 ... Iron core accommodating part (magnetic substance accommodating part), 75 ... Bobbin part,
78 ... Iron core (magnetic material) constituting the antenna,
81, 91 ... lead frames constituting circuit forming members,
84 ... fusing part (a part of the lead frame), 80 ... coil constituting the antenna,
C: vehicle-side connector, E2: vehicle interior communication area (detection area in vehicle interior), R: electronic component.

Claims (6)

In an antenna device mounted on a vehicle in order to perform predetermined wireless communication between a vehicle-side control device and a vehicle external device having a communication function,
A case placed in the passenger compartment;
An antenna provided in the case;
A circuit forming member provided in the case and mounted with a predetermined electronic component and connected to the antenna;
An antenna-side connector connected to the circuit-forming member and connected to a vehicle-side connector drawn from the control device;
The antenna side connector and the case are integrally formed ,
The antenna-side connector includes a connector terminal to which the vehicle-side connector is connected and a connection terminal to be connected to the circuit-forming member so as to electrically connect the vehicle-side connector and the circuit-forming member. With multiple conductors
Each conductor is insert-molded to the case,
The antenna includes a magnetic body formed in a rod shape, and a coil wound around the magnetic body,
The case is formed in a rectangular parallelepiped shape corresponding to the length of the magnetic body, and the case and the antenna-side connector are arranged linearly,
A first housing portion that can accommodate the antenna is formed in an opening on one side of the case, while the circuit forming member can be accommodated on the other surface that is the side surface opposite to the first housing portion. 2 Open the housing part,
In the second housing portion, each connection terminal of the antenna-side connector and a pair of connection terminals provided at both ends of the coil of the antenna housed in the first housing portion are respectively projected.
An antenna device configured to fix the circuit forming member in the second housing portion in a state where the projecting connection terminals and the circuit forming members are inserted through the connection terminals . The antenna device according to claim 1 , wherein the antenna and the circuit forming member are arranged so as to overlap each other. In an antenna device mounted on a vehicle in order to perform predetermined wireless communication between a vehicle-side control device and a vehicle external device having a communication function,
A case placed in the passenger compartment;
An antenna provided in the case;
A circuit forming member provided in the case and mounted with a predetermined electronic component and connected to the antenna;
An antenna-side connector connected to the circuit-forming member and connected to a vehicle-side connector drawn from the control device;
The antenna side connector and the case are integrally formed ,
The circuit forming member is a lead frame provided integrally with the case, and the electronic component is mounted on the lead frame,
The antenna includes a magnetic body formed in a rod shape, and a coil disposed around the magnetic body,
The case is formed in a cylindrical shape, and an opening is formed at one end of the case to accommodate the magnetic body, and a bobbin portion around which the coil is wound is integrated with the outer peripheral surface of the case. An antenna device to be formed . The antenna apparatus according to claim 3 , wherein a part of the lead frame is plastically deformed to connect both ends of the coil and the lead frame. The antenna device according to claim 3 or 4 , wherein the case to which the antenna and the lead frame are attached is covered and sealed with a thermoplastic resin so that the antenna-side connector is exposed to the outside. In the manufacturing method of the antenna device according to any one of claims 3 to 5 ,
A first step of insert molding the lead frame into a case;
A second step of mounting an electronic component on the insert-molded lead frame;
And a third step of assembling the antenna to the case.

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