JP2019080096A - Antenna device - Google Patents

Abstract

To provide an antenna device which allows for drainage of water that has invaded the antenna device.SOLUTION: An antenna device includes an antenna case 2, an antenna element located in a space covered with the antenna case 2, a board electrically connected with the antenna element, a base for holding the board, and a pad 13 having an annulus ring 131 along an outer edge of the antenna case and a side part 132 provided at an underside of the annulus ring 131 along the outer edge of the annulus ring 131 and having a profile of a trapezoidal shape. The pad 13 has a groove 133 connecting the internal space a1 and the outer space a2. An end face 133b of the groove 133 at an internal space a1 side is brought into contact with the underside 131a of the annulus ring 131. The side part 132 is configured so that the outer edge of an underside 132a is located farther outside than that of a top face. An end face 133a of the groove 133 at an outer space a2 side is brought into contact with the underside 132a of the side part 132.SELECTED DRAWING: Figure 11

Description

  The present invention relates to an antenna device.

  Heretofore, as disclosed in Patent Document 1, there has been proposed an on-vehicle antenna device in which waterproofness is enhanced by using a waterproof seal member or the like.

JP, 2016-025477, A

  However, it has not been considered to discharge the water that has invaded into the antenna device.

  SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an antenna arrangement which allows drainage of water which has entered the antenna arrangement.

  An antenna device according to the present invention includes an antenna case, an antenna element located in a space covered by the antenna case, a substrate electrically connected to the antenna element, a base for holding the substrate, and an outer edge of the antenna case And a pad having an annular portion along the outer edge of the annular portion and a side portion provided on the lower surface of the annular portion and having a trapezoidal cross section, the pad connecting the inner space and the outer space It has a groove.

  Water accumulated in the internal space can be discharged to the external space through the ditch.

  Preferably, the end face on the inner space side of the groove is in contact with the lower surface of the annular portion.

  Compared with the configuration in which the end face of the inner space of the pad in the groove is in contact with the inner circumferential surface of the side and not in contact with the lower surface of the annular portion, the groove is enlarged and the region of the pad not in contact with the mounting surface is enlarged. Water can flow easily through the ditch.

  Also preferably, the side portion is configured such that the outer edge of the lower surface is located outward relative to the outer edge of the upper surface.

  Compared with the configuration in which the outer edge of the lower surface at the side is formed to be recessed inward relative to the outer edge of the upper surface, no recess is formed between the antenna device and the mounting surface, the aesthetics are not lost, and water intrusion Will be easier to prevent.

  More preferably, the end surface on the side of the outer space in the groove is in contact with the lower surface of the side.

  The groove can be made inconspicuous from the outside as compared with a configuration in which the end face on the outer space side of the pad in the groove is in contact with the outer peripheral surface of the side and not in contact with the lower surface of the side.

  Also preferably, the base has ribs along the outer edge of the substrate.

  By providing the rib, water that has entered the antenna device is less likely to enter the inside of the rib, and water can be prevented from entering the interior of the vehicle through the cable hole provided on the inside of the rib. become.

  More preferably, the rib is provided in the wall-shaped area with an opening for passing the cable, the base is provided with a cable hole for passing the cable up and down, and the cable hole is between the groove and the opening Will be placed.

  Also, preferably, the groove is provided in an area opposite to the area where the height of the surface to be attached is low.

  Also preferably, the groove is provided on the inner peripheral surface of the side portion, and before being attached, the groove is hidden by the outer peripheral surface of the side portion, and when attached, the groove connects the inner space and the outer space.

  As described above, according to the present invention, it is possible to provide an antenna device that enables drainage of water that has entered the antenna device.

In the perspective view which looked at the antenna device in this embodiment from the upper part, the antenna case is omitted. It is the perspective view which looked at each part before assembling an antenna apparatus from upper direction. In the side view of an antenna device, an antenna case is omitted. It is the perspective view which looked at the metal base from upper direction. It is a bottom view of an antenna device. It is the perspective view which looked at an antenna device from the lower part. It is the perspective view which expanded the area | region in which the groove | channel in the pad was provided was seen from the downward direction. It is a xz cross-section block diagram of a front front-end | tip part of an antenna apparatus before attaching to a roof, and a part without a groove | channel. It is a xz cross-section block diagram of a front tip part of an antenna device before attaching to a roof, and a portion with a slot. It is a front tip part of an antenna device after being attached to a roof, and it is xz section lineblock diagram of a portion without a slot. It is a front tip part of an antenna device after being attached to a roof, and which is a xz section block diagram of a portion with a slot. It is a xz section block diagram of a portion which is a front tip part of an antenna device, and has a slot, whose end face by the side of an inner space of a pad in a slot touches an inner skin of a side part, and does not touch the undersurface of a ring part. It is a xz section block diagram of a portion which is a front tip part of an antenna device and which has a slot in which the end face by the side of the exterior space of a pad in a slot touches the peripheral face of a side, and does not touch the undersurface of a side. 13 is an xz sectional view of the front end portion of the antenna device having the groove and the end face of the external space side of the pad in the groove being in contact with the outer peripheral surface of the side and not in contact with the lower surface of the side; Indicates another form.

  Hereinafter, the present embodiment will be described using the drawings. The antenna device 1 in the present embodiment is attached to the top surface of a vehicle such as a roof, and the antenna case 2, the first antenna element 3, the second antenna element 4, the first antenna element holder 5, the second antenna element holder 6, and the non-feed. Element holder 7, parasitic element 8, satellite digital audio radio service (SDARS) antenna 9, first substrate 10, global navigation satellite system (GNSS) antenna 11, second substrate 12, pad 13, metal base 14, a spring 15, a waterproof seal 16, and an attachment member (temporary holding holder 17, locking member 18, washer 19, bolt 20) (see FIGS. 1 to 11).

  In order to explain the direction, the longitudinal direction of the vehicle to which the antenna device 1 is attached will be described as the x direction, the lateral direction perpendicular to the x direction as the y direction, and the substantially vertical direction perpendicular to the x direction and the y direction as the z direction. In FIG. 1, the directions indicated by the respective arrows of the x, y, and z axes are defined as a forward direction, a right direction, and an upper direction, respectively.

The antenna case 2 is a member covering the members constituting the antenna device 1 and is made of synthetic resin having non-light transmitting property and radio wave transmitting property (polycarbonate including Polycarbonate and ASA (Acrylate Styrene Acrylonitrile), etc. Resin molded product), for example, has a shark fin shape which is inclined so that the x direction front is lower than the x direction back, and both side surfaces are curved inward (see FIG. 2).
The lower surface of the antenna case 2 is open and is a member constituting the antenna device 1, and covers the components other than the antenna case 2 (such as the GNSS antenna 11) from above in the z direction.
That is, antenna elements (first antenna element 3, second antenna element 4, SDARS antenna element, GNSS antenna element) described later are located in the space covered by the antenna case 2.

The antenna case 2 is provided with mounting holes (not shown) for attachment to the pad 13 and the metal base 14 so as to project downward from the inner wall in the z direction, and when fixing the antenna case 2 to the metal base 14 or the like. Then, screwing is performed via the mounting hole of the antenna case 2, the mounting hole (first mounting hole 13 a) of the pad 13, and the mounting hole (second mounting hole 14 a) of the metal base 14.
In the present embodiment, an example in which six attachment holes are provided on the inner wall of the antenna case 2 is shown, but the number of attachment holes is not limited to this.

  The first antenna element 3 is an antenna element for mobile communication using a telephone line, communicates with a mobile phone base station, receives information from a terminal in a call state, and transmits information to the terminal Used for communication (for transmission and reception).

  The first antenna element 3 is formed in a plate shape, and has a shape including a ridge portion having a substantially constant z-direction height and a side portion extending in the z-direction from the ridge portion.

  A first protrusion 31 projecting downward in the z direction is provided on the lower end of one of the side portions of the first antenna element 3 (right side when viewed from the rear in the x direction), and the first antenna element is formed via the first protrusion 31 3 are attached to the second substrate 12.

  Specifically, the first projection 31 is inserted into the hole of the second substrate 12 and soldered, so that the first antenna element 3 is electrically connected in a state of being erected on the second substrate 12. Ru.

  Between the first antenna element 3 and the second substrate 12, a first antenna element holder 5 for holding the first antenna element 3 is provided.

  The second antenna element 4 is an antenna element for mobile communication using a telephone line, and is used to communicate with a mobile phone base station and receive information from a terminal in a call state (reception only ).

  The second antenna element 4 is formed in a plate shape, and has a shape including a planar ridge line portion inclined so that the x direction front is lower than the x direction rear, and a side surface portion extending in the z direction from the ridge line portion .

  At the lower end of one of the side portions of the second antenna element 4 (left side when viewed from the rear in the x direction), a rectangular second projection 41 projecting downward in the z direction is provided, and the second projection 41 The two antenna elements 4 are the second substrate 12 and are attached to the front of the first antenna elements 3 in the x direction.

  Specifically, the second projection 41 is inserted into the hole of the second substrate 12 and soldered, so that the second antenna element 4 is electrically connected in a state where the second antenna element 4 is erected on the second substrate 12. Ru.

  A second antenna element holder 6 for holding the second antenna element 4 is provided between the second antenna element 4 and the second substrate 12.

  The SDARS antenna 9 is a patch antenna used to receive digital broadcasts, and the antenna element for SDARS (not shown) is covered at the top by the parasitic element 8 held by the parasitic element holder 7. The SDARS antenna element is electrically connected to the first substrate 10.

The SDARS antenna 9 is attached to the upper surface of the first substrate 10.
The first substrate 10 is attached to the metal base 14 by screwing.

The GNSS antenna 11 is used to receive position information and time information of the satellite from a GPS (Global Positioning System) satellite or the like.
The GNSS antenna 11 is a patch antenna which is a second substrate 12 and is mounted on the front side of the first antenna element 3 in the x direction and on the rear side of the second antenna element 4 in the x direction. Are electrically connected to the second substrate 12.

The second substrate 12 is disposed forward of the first substrate 10 in the x direction, and the first antenna element 3, the second antenna element 4, and the GNSS antenna 11 are attached to the top surface.
The second substrate 12 is attached to the metal base 14 by screwing.
A cable 25 is electrically connected to the lower surface of the first substrate 10 and the lower surface of the second substrate 12, and is connected to an electric device of a vehicle such as a car navigation system via the cable 25.

The pad 13 is an annular elastic member formed of an elastomer, rubber or the like, and is inserted into the lower end peripheral portion of the antenna case 2 and disposed in a state of being sandwiched between the antenna case 2 and the metal base 14 , Functions as a blindfold of the gap between the lower end peripheral portion of the antenna case 2 and the vehicle.
The pad 13 is provided on an annular portion 131 formed along the outer edge of the metal base 14 and a lower surface 131 a of the annular portion 131 along the outer edge of the annular portion 131 and has a ring shape thinner than the annular portion 131 And has a side 132 having a cross section (longitudinal cross section) perpendicular to the xy plane and passing through the inside and the outside of the ring and having a substantially trapezoidal shape.

  In FIGS. 8 to 14, although a broken line is shown on the cross section to explain the boundary between the annular portion 131 and the side portion 132, the annular portion 131 and the side portion 132 are integrally formed. In fact, the broken line does not exist.

  A first mounting hole 13 a for screwing with the antenna case 2 and the metal base 14 is provided in the peripheral portion (ring portion 131) of the pad 13, and a hole 13 b is formed in the inside of the ring portion 131. A part of the metal base 14 such as the rib 141 and the cable 25 are vertically passed through the holes 13b.

The outer edge 132a1 of the lower surface 132a of the side portion 132 is inclined to the outer peripheral surface 132d of the side portion 132 so as to protrude outward as compared with the outer edge 132b1 of the upper surface 132b of the side portion 132 and the outer edge 131b of the annular portion 131. Provided.
When the outer edge 132a1 of the lower surface 132a in the side portion 132 is configured to be recessed inward relative to the outer edge 132b1 of the upper surface 132b in the side portion 132, a recess is formed between the antenna device 1 and the roof 21 It looks like and the beauty is lost.
In addition, since the recess is weak to the pressure from the outside, when high-pressure water is injected, water can easily infiltrate through the recess.

  In this embodiment, since the outer edge 132a1 of the lower surface 132a of the side portion 132 is configured to protrude outward compared to the outer edge 132b1 of the upper surface 132b, the antenna device is No dent is formed between the roof 1 and the roof 21 so that the appearance is not impaired and it is easy to prevent the entry of water.

On the inner side (inner peripheral surface 132c) of the side portion 132, the inner space (the space closed by the roof 21, the pad 13 and the metal base 14) a1 of the pad 13 and the outer space (the outside of the antenna device 1 and the pad) An elongated longitudinally extending groove 133 is provided to connect the inner space 13 with a space a2 separated from the inner space 13 (see FIGS. 5 to 11).
The groove 133 is provided on the front side in the x direction on the side portion 132.
Water collected in the internal space a1 can be discharged to the external space a2 through the groove 133.

The end face (lower end face) 133a on the side of the outer space a2 of the pad 13 in the groove 133 is in contact with the lower surface 132a of the side part 132, and the end face (upper end face) 133b on the side of the internal space a1 of the pad 13 in the groove 133 is It is in contact with the lower surface 131 a of the annular portion 131.
The groove 133 provided on the inner circumferential surface 132 c of the side portion 132 does not contact the outer side (the outer circumferential surface 132 d) of the side portion 132.
Therefore, before the antenna device 1 is pressed against the roof 21, the groove 133 is hidden from the outer space a2 on the front side in the x direction, hiding in the outer peripheral surface 132 d of the side portion 132.

When the antenna device 1 is attached to the roof 21, the antenna device 1 is urged to approach the roof 21 via a mounting member such as a bolt 20 so that the waterproof seal 16 adheres to the roof 21. (The antenna device 1 is pressed against the roof 21), whereby the inner portion of the lower surface 132a is in contact with the roof 21 (see FIG. 10) for the portion of the side portion 132 where the groove 133 is absent. In the region where the groove 133 is provided in the portion 132, the inner portion of the lower surface 132a is not in contact with the roof 21, and the pad 13 and the roof 21 are separated by the groove 133 (see FIG. 11).
The outer portion of the lower surface 132a of the side portion 132 floats up from the roof 21 and is separated upward in the z direction, so the groove 133 connects the internal space a1 and the external space a2 and is accumulated in the internal space a1 via the groove 133. Water can be discharged to the external space a2.

  In particular, in the case where the antenna device 1 is attached to a surface of the roof 21 of the vehicle inclined such that the height in the z direction is higher than the x direction in the rear in the x direction, The accumulated water can be discharged to the external space a2 by gravity.

  When the antenna device 1 is attached to a surface of the roof 21 of the vehicle inclined in such a manner that the height in the x direction is higher than the height in the x direction than the x direction, Preferably, the groove 133 is provided, that is, the groove 133 is provided inside the area where the height in the z direction of the side portion 132 decreases when the antenna device 1 is attached to the roof 21 of the vehicle.

  Since the end surface 133b of the groove 133 on the side of the inner space a1 of the pad 13 is in contact with the lower surface 131a of the annular portion 131, the end surface 133b is in contact with the inner circumferential surface 132c of the side portion 132 and the lower surface 131a of the annular portion 131 By making the groove 133 larger, the region of the pad 13 not in contact with the roof 21 can be made larger than in the mode (see FIG. 12) not in contact with water, and water can easily flow through the groove 133.

Further, since the end surface 133a of the groove 133 on the side of the outer space a2 of the pad 13 contacts the lower surface 132a of the side portion 132 and does not contact the outer peripheral surface 132d of the side portion 132, the end surface 133a is the outer peripheral surface 132d of the side portion 132. The groove 133 can be made inconspicuous from the outside as compared with the form (refer to FIGS. 13 and 14) not in contact with the lower surface 132a of the side part 132.
For this reason, for example, even if the drain port is simply provided at the rear side in the x direction and the like, the groove 133 can be made not to impair the aesthetic appearance of the antenna device 1 even if it is compared.

The metal base 14 is a metal plate for holding the first substrate 10, the second substrate 12, and the pad 13, and a second attachment hole 14a for screwing with the antenna case 2 and the pad 13 is provided in the peripheral portion. The central portion is provided with a cable hole 14b for passing the cable 25 up and down (see FIG. 4).
That is, the antenna elements (the first antenna element 3, the second antenna element 4, the SDARS antenna element, and the GNSS antenna element) are held by the metal base 14 via the first substrate 10 and the second substrate 12.

Further, a rib 141 is provided on the outer edge of the region holding the second substrate 12 on the upper surface of the metal base 14 and inside the region in contact with the pad 13.
The rib 141 is formed in a wall shape surrounding the cable hole 14b.

  However, when a substrate (first substrate 10) different from the substrate (second substrate 12) in the region where the rib 141 is provided as in the present embodiment, the cable hole of the cable 25 is provided. An opening 141a extending from 14b to the first substrate 10 and passing through the cable 251 electrically connected to the first substrate 10 is provided at the rear of the rib 141 in the x direction, and the cable 141 is guided forward from the opening 141a in the x direction Path 141b is provided.

By providing the wall-shaped rib 141 extending in the z direction, the water which has entered the antenna device 1 is less likely to enter the inside of the rib 141, and the cable hole 14b provided on the inside of the rib 141 It is possible to prevent water from entering the inside.
In particular, when the antenna device 1 is attached to a surface of the roof 21 of the vehicle inclined such that the height in the z-direction is higher than the x-direction in the rear in the x direction, Water can be less likely to enter the inside of the rib 141.

Accordingly, it is desirable that the groove 133 and the opening 141a be configured such that the cable hole 14b is disposed between the groove 133 and the opening 141a.
The groove 133 is provided in the area facing the area where the height in the z direction of the roof 21 is low, and the opening 141a is provided in the area facing the area where the height in the z direction is higher than the low area. Water can hardly enter and the water that has entered the internal space a1 can be easily discharged from the groove 133.

  When the antenna device 1 is attached to a surface of the roof 21 of the vehicle inclined such that the height in the x direction is higher than the height in the x direction than the x direction, the opening 141a is the front of the rib 141 in the x direction. Preferably, the opening 141a is provided in a region where the height in the z direction of the rib 141 is increased when the antenna device 1 is attached to the roof 21 of the vehicle.

A spring 15, a waterproof seal 16, and a mounting member (temporary holding holder 17, locking member 18, washer 19, bolt 20) are provided at the lower part of the metal base 14.
The spring 15 is a metal plate spring and contacts the roof 21 when the antenna device 1 is attached to the roof 21 of the vehicle, and the frequency of unnecessary resonance generated in the antenna device 1 is outside the desired band of the antenna device 1 Used to change to frequency.
The waterproof seal 16 is formed in a ring shape that surrounds the cable hole 14b and the mounting member, and prevents water from entering the interior of the vehicle from between the metal base 14 and the roof 21 of the vehicle (internal space a1). Provided in
The antenna device 1 is attached to the roof 21 or the like of the vehicle via the attachment member.

DESCRIPTION OF SYMBOLS 1 antenna apparatus 2 antenna case 21 roof of vehicle 3 1st antenna element 31 1st protrusion 4 2nd antenna element 41 2nd protrusion 5 1st antenna element holder 6 2nd antenna element holder 7 parasitic element holder 8 parasitic element 9 SDARS antenna 10 first substrate 11 GNSS antenna 12 second substrate 13 pad 13a first mounting hole 13b hole 131 annular portion 131b outer edge of annular portion 132 side 132a lower surface of side 132a1 outer edge 132b of lower surface of side The upper surface 132b1 The upper surface of the side 132d The inner surface 132d of the side The outer surface 133d of the side 133 The groove 133a The end surface of the outer space side of the groove 133b The end surface of the inner space side of the groove 14 Metal base 14a Second mounting hole 14b cable hole 141 rib 141a opening 141b induction 17 provisionally holding the holder 18 locking member 19 washer 20 bolt 25 cable 251 internal space a2 external space pad of the first cable a1 pad is the substrate and electrically connected

Claims (8)

Antenna case,
An antenna element located in a space covered by the antenna case;
A substrate electrically connected to the antenna element;
A base for holding the substrate;
And a pad having an annular portion along the outer edge of the antenna case, and a side portion provided on the lower surface of the annular portion along the outer edge of the annular portion and having a trapezoidal cross section.
The said pad has a groove | channel which connects interior space and exterior space, The antenna apparatus characterized by the above-mentioned.   The antenna device according to claim 1, wherein an end surface of the groove on the side of the inner space is in contact with a lower surface of the annular portion.   The antenna apparatus according to claim 1 or 2, wherein the side portion is configured such that the outer edge of the lower surface is located outside the outer edge of the upper surface.   The antenna device according to any one of claims 1 to 3, wherein the end face of the groove on the side of the outer space is in contact with the lower surface of the side portion.   The antenna apparatus according to any one of claims 1 to 4, wherein the base has a rib along the outer edge of the substrate. The rib is provided with an opening for passing a cable in a wall-shaped area,
The base is provided with a cable hole for passing the cable up and down;
The antenna device according to claim 5, wherein the cable hole is disposed between the groove and the opening.   The antenna device according to any one of claims 1 to 6, wherein the groove is provided in an area opposite to an area where the height of the surface to be attached is low. The groove is provided on the inner circumferential surface of the side portion,
Before being attached, the groove is hidden on the outer peripheral surface of the side,
The antenna device according to any one of claims 1 to 7, wherein when attached, the groove connects the inner space and the outer space.

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