Antenna device

Abstract

To reduce the number of members for waterproofing the circumference of an antenna element in a housing and the number of members for waterproofing a portion where a cable passes in the housing.SOLUTION: An antenna device 10A comprises: a housing 100A; an antenna element 400A; a first cable 510A electrically connected with the antenna element 400A; and a waterproof pad 200A that surrounds at least a part of the antenna element 400A. The waterproof pad 200A has a first grommet 210A into which the first cable 510A is inserted.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an antenna device.

Background Art

[0002] In recent years, various antenna devices such as antennas for the fifth-generation mobile communication system (5G) have been developed. For example, as described in Patent Document 1, an antenna element may be housed in a housing. In this case, it is necessary to draw out a cable connected to the antenna element to the outside of the housing.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When an antenna element is housed in a housing, waterproofing around the antenna element in the housing may be required. In this case, for example, the periphery of the antenna element in the housing is waterproofed by a waterproof member such as a waterproof sealant or an adhesive. Further, when a cable is drawn out from the housing, waterproofing of the portion through which the cable passes in the housing may be required. However, if a member for waterproofing around the antenna element in the housing and a member for waterproofing the portion through which the cable passes in the housing are provided separately, the number of parts of these members becomes relatively large.

[0005] An example of the object of the present invention is to reduce the number of parts of a member for waterproofing around the antenna element in the housing and a member for waterproofing the portion through which the cable passes in the housing.

Means for Solving the Problems

[0006] One aspect of the present invention is a housing, an antenna element housed in the housing, a cable electrically connected to the antenna element, a waterproof pad surrounding at least a part of the antenna element, and the waterproof pad has a grommet through which the cable passes, and it is an antenna device.

Advantages of the Invention

[0007] According to the above aspect of the present invention, the number of parts of a member for waterproofing the periphery of the antenna element in the housing and a member for waterproofing the portion through which the cable passes in the housing can be reduced.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Mode for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

[0010] In this specification, ordinal numbers such as "first", "second", and "third" are given simply to distinguish configurations with the same name, unless otherwise specified, and do not mean specific features of the configuration (for example, order or importance).

[0011] (Embodiment 1) FIG. 1 is a perspective view of an antenna device 10A according to Embodiment 1. FIG. 2 is an exploded perspective view of the antenna device 10A according to Embodiment 1. FIG. 3 is a cross-sectional view taken along the line A-A' of FIG. 1. FIG. 4 is a cross-sectional view taken along the line B-B' of FIG. 1. FIG. 5 is a cross-sectional view taken along the line C-C' of FIG. 1.

[0012] In FIGS. 1 to 5, the arrow indicating the first direction X, the second direction Y, or the third direction Z indicates that the direction from the base end to the tip of the arrow is the positive direction of the direction indicated by the arrow, and the direction from the tip to the base end of the arrow is the negative direction of the direction indicated by the arrow. In FIGS. 3 and 4, the white circle with a black dot indicating the first direction X indicates that the direction from the back to the front of the paper surface is the positive direction of the first direction X, and the direction from the front to the back of the paper surface is the negative direction of the first direction X. In FIG. 5, the white circle with an X indicating the second direction Y indicates that the direction from the front to the back of the paper surface is the positive direction of the second direction Y, and the direction from the back to the front of the paper surface is the negative direction of the second direction Y.

[0013] The first direction X is a direction parallel to a predetermined pair of sides of the base 102A described later. The second direction Y is a direction parallel to the other pair of sides of the base 102A. The third direction Z is a direction parallel to the height direction of the antenna device 10A. Specifically, the positive direction of the third direction Z is the direction from the side where the base 102A is located to the side where the case 104A described later is located. The negative direction of the third direction Z is the direction from the side where the case 104A is located to the side where the base 102A is located.

[0014] In Embodiment 1, the third direction Z is a direction parallel to the vertical direction. Specifically, the positive direction of the third direction Z is the direction from the lower side to the upper side in the vertical direction. The negative direction of the third direction Z is the direction from the upper side to the lower side in the vertical direction. The first direction X and the second direction Y are directions parallel to the horizontal direction perpendicular to the vertical direction. However, the relationship among the first direction X, the second direction Y, the third direction Z, the vertical direction, and the horizontal direction is not limited to this example. For example, the first direction X or the second direction Y may be parallel to the vertical direction.

[0015] With reference to FIG. 2, the antenna device 10A will be described.

[0016] The antenna device 10A includes a housing 100A, a waterproof pad 200A, an inner case 300A, an antenna element 400A, a first cable 510A, and a second cable 520A. The antenna device 10A may further include a circuit board (not shown) housed in the housing 100A as needed. The housing 100A has a base 102A and a case 104A. The waterproof pad 200A has a waterproof sealing material 202A, a first grommet 210A, and a second grommet 220A. The inner case 300A has a cover plate 302A and side walls 304A. The antenna element 400A has a first element 410A and a second element 420A. The first element 410A includes a first element section 412A and a second element section 414A. The second element 420A includes a third element section 422A and a fourth element section 424A. A first ferrite core 512A is provided on the first cable 510A. A second ferrite core 522A is provided on the second cable 520A.

[0017] When viewed from above, the base 102A has a substantially square shape having a pair of sides extending substantially parallel to the first direction X and another pair of sides extending substantially parallel to the second direction Y. However, the shape of the base 102A is not limited to the shape according to Embodiment 1.

[0018] Hereinafter, as needed, when viewed from above, the direction from the corners on the negative direction side of the first direction X and the negative direction side of the second direction Y of the base 102A to the corners on the positive direction side of the first direction X and the positive direction side of the second direction Y of the base 102A is referred to as a first diagonal direction D1. Hereinafter, as needed, when viewed from above, the direction opposite to the first diagonal direction D1 is referred to as a second diagonal direction D2. Hereinafter, as needed, when viewed from above, the direction from the corners on the positive direction side of the first direction X and the negative direction side of the second direction Y of the base 102A to the corners on the negative direction side of the first direction X and the positive direction side of the second direction Y of the base 102A is referred to as a third diagonal direction D3. Hereinafter, as needed, when viewed from above, the direction opposite to the third diagonal direction D3 is referred to as a fourth diagonal direction D4.

[0019] When viewed from above, the case 104A has substantially the same shape as the base 102A. The case 104A covers the space above the base 102A. Also, the case 104A is attached to the base 102A. By attaching the base 102A and the case 104A to each other, the housing 100A is formed. The housing 100A houses the inner case 300A and the antenna element 400A.

[0020] The base 102A and the case 104A are fixed to each other by a plurality of screws 106A. Each screw 106A penetrates the base 102A in the third direction Z from below and is inserted into the case 104A. In Embodiment 1, when viewed from above, eight screws 106A are provided at eight locations, namely, the four corner portions of the base 102A and the substantially central portions of each side of the base 102A. However, the number of the screws 106A and the positions where the screws 106A are provided are not limited to the example according to Embodiment 1.

[0021] On the upper surface of the base 102A, a surrounding wall 110A is provided. When viewed from above, the surrounding wall 110A surrounds the region where the inner case 300A, the antenna element 400A, the first ferrite core 512A, and the second ferrite core 522A are arranged. When viewed from above, the surrounding wall 110A has a substantially square shape having a pair of sides extending substantially parallel to the first direction X and the other pair of sides extending substantially parallel to the second direction Y. When viewed from above, at substantially the central portion of each side of the surrounding wall 110A, there are provided recesses recessed toward the central portions of the base 102A in the first direction X and the second direction Y. At the portions of the surrounding wall 110A where the recesses are provided, the screws 106A provided at substantially the central portions of each side of the base 102A are provided.

[0022] The waterproof sealing material 202A is an elastic material such as rubber. The waterproof sealing material 202A is provided to waterproof the periphery of the inner case 300A, the antenna element 400A, the first ferrite core 512A, and the second ferrite core 522A in the housing 100A. When viewed from above, the waterproof sealing material 202A is provided along the surrounding wall 110A. When viewed from above, the waterproof sealing material 202A has a substantially square shape having a pair of sides extending substantially parallel to the first direction X and another pair of sides extending substantially parallel to the second direction Y, similar to the surrounding wall 110A. When viewed from above, at substantially the central portion of each side of the waterproof sealing material 202A, similar to substantially the central portion of each side of the surrounding wall 110A, a recess is provided that is recessed toward the central portions of the first direction X and the second direction Y of the base 102A.

[0023] The first grommet 210A is an elastic material such as rubber. The first grommet 210A is provided to waterproof the portion through which the first cable 510A passes in the housing 100A. The first grommet 210A is integrated with the waterproof sealing material 202A. Therefore, compared with the case where the waterproof sealing material 202A and the first grommet 210A are separate bodies, the number of parts of the member for waterproofing the periphery of the antenna element 400A in the housing 100A and the member for waterproofing the portion through which the first cable 510A passes in the housing 100A can be reduced. The first grommet 210A is connected to the outer edge of the portion extending substantially parallel to the second direction Y on the positive direction side of the first direction X of the waterproof sealing material 202A. Also, the first grommet 210A is located on the negative direction side of the second direction Y with respect to the center of the second direction Y of the base 102A.

[0024] The second grommet 220A is made of an elastic material such as rubber. The second grommet 220A is provided to waterproof the portion of the housing 100A through which the second cable 520A passes. The second grommet 220A is integrated with the waterproof sealant 202A. Therefore, compared with the case where the waterproof sealant 202A and the second grommet 220A are separate bodies, the number of components of the member for waterproofing the periphery of the antenna element 400A in the housing 100A and the member for waterproofing the portion of the housing 100A through which the second cable 520A passes can be reduced. The second grommet 220A is connected to the outer edge of the portion extending substantially parallel to the second direction Y on the positive side in the first direction X of the waterproof sealant 202A. Also, the second grommet 220A is located on the positive side in the second direction Y with respect to the center in the second direction Y of the base 102A. Note that the second grommet 220A may be integrated with the first grommet 210A.

[0025] When viewed from above, the cover plate 302A has a substantially hexagonal shape. Specifically, when viewed from above, the cover plate 302A has two sides extending substantially parallel to two sides of the corner portion on the first diagonal direction D1 side of the base 102A. Also, when viewed from above, the cover plate 302A has two sides extending substantially parallel to two sides of the corner portion on the second diagonal direction D2 side of the base 102A. Further, when viewed from above, the cover plate 302A has one side extending in a direction substantially parallel to the first diagonal direction D1 and the second diagonal direction D2 on the third diagonal direction D3 side, and one side extending in a direction substantially parallel to the first diagonal direction D1 and the second diagonal direction D2 on the fourth diagonal direction D4 side. However, the shape of the cover plate 302A is not limited to the shape according to the first embodiment.

[0026] The side wall 304A extends downward from each side of the cover plate 302A. When viewed from below, the side wall 304A surrounds the region where the second element 420A is disposed.

[0027] The inner case 300A is positioned by two positioning pins 112A provided on the upper surface of the base 102A. When viewed from above, the two positioning pins 112A are located on both sides of the center of the base 102A in the first direction X with respect to the first direction X and the second direction Y.

[0028] As shown in FIG. 7 described later, when viewed from below, two engaging claws 312A are provided at each of the lower ends of the side wall 304A on the side of the third diagonal direction D3 of the cover plate 302A and the lower end of the side wall 304A on the side of the fourth diagonal direction D4 of the cover plate 302A. The engaging claws 312A can be joined to the upper surface of the base 102A by mechanical joining such as snap fitting. Therefore, the inner case 300A can be mechanically joined to the base 102A by the mechanical joining between the engaging claws 312A and the base 102A.

[0029] When viewed from above, four protrusions 314A are provided on the cover plate 302A. Specifically, when viewed from above, two protrusions 314A are provided on each of the side of the third diagonal direction D3 of the cover plate 302A and the side of the fourth diagonal direction D4 of the cover plate 302A. In a state where the case 104A is attached to the base 102A, the upper surface of each protrusion 314A contacts the inner surface of the case 104A. Therefore, compared with the case where the protrusions 314A are not provided, rattling in the third direction Z of the inner case 300A can be suppressed. Note that the inner case 300A may not be provided with the protrusions 314A.

[0030] When viewed from above, a stopper 316A is provided on the side of the cover plate 302A in the fourth diagonal direction D4. In a state where the inner case 300A is attached to the base 102A, the stopper 316A covers at least a part of the upper portion of the first ferrite core 512A. Therefore, compared with the case where the stopper 316A is not provided, the rattling of the first ferrite core 512A in the third direction Z can be suppressed. Specifically, in a state where the inner case 300A is attached to the base 102A, the stopper 316A covers at least a part of the negative direction side of the first ferrite core 512A in the first direction X and does not cover at least a part of the positive direction side of the first ferrite core 512A in the first direction X. For this reason, in a state where the inner case 300A is attached to the base 102A, at least a part of the positive direction side of the first ferrite core 512A in the first direction X is exposed from the stopper 316A. Note that the stopper 316A may not be provided.

[0031] An exposure hole 318A is provided in a portion of the cover plate 302A that overlaps at least a part of the second ferrite core 522A in the third direction Z. Therefore, in a state where the inner case 300A is attached to the base 102A, at least a part of the second ferrite core 522A is exposed from the exposure hole 318A.

[0032] In Embodiment 1, the antenna element 400A operates as a fifth-generation mobile communication system (5G) antenna. However, the antenna element 400A may be an antenna different from the 5G antenna.

[0033] The first element 410A operates as a self-similar antenna or an antenna similar thereto. In Embodiment 1, the first element 410A operates as a bowtie antenna. A "self-similar antenna" is an antenna whose shape remains similar even when the scale (size ratio) is changed, such as a bowtie antenna or a biconical antenna.

[0034] Each of the first element section 412A and the second element section 414A is made of sheet metal. The first element section 412A is attached to the upper surface of the base 102A and the corner on the fourth diagonal direction D4 side of the surrounding wall 110A by snap fit. The second element section 414A is attached to the upper surface of the base 102A and the corner on the third diagonal direction D3 side of the surrounding wall 110A by snap fit.

[0035] Each of the first element section 412A and the second element section 414A has a first base end E1. At the first base end E1, the first element section 412A and the second element section 414A are closest to each other. The first base end E1 includes a power supply point connected to one end of the first cable 510A. When viewed from above, the first base end E1 overlaps with the approximate center of the base 102A in the first direction X and the second direction Y.

[0036] The first element section 412A extends substantially parallel to the upper surface of the base 102A from the first base end E1 of the first element section 412A to the corner on the fourth diagonal direction D4 side of the surrounding wall 110A. The first element section 412A has a bifurcated tip at the corner on the fourth diagonal direction D4 side of the surrounding wall 110A. The bifurcated tip of the first element section 412A is open. One of the bifurcated tips of the first element section 412A is bent upward along the side substantially parallel to the first direction X of the corner on the fourth diagonal direction D4 side of the surrounding wall 110A. The other of the bifurcated tips of the first element section 412A is bent upward along the side substantially parallel to the second direction Y of the corner on the fourth diagonal direction D4 side of the surrounding wall 110A.

[0037] The first element section 412A includes a portion that operates as a self-similar antenna or an antenna similar thereto. Specifically, when viewed from above, the width of the first element section 412A widens as it extends from the first base end portion E1 of the first element section 412A toward the branched tip of the first element section 412A. Therefore, when viewed from above, the width of the first element section 412A on the distal side with respect to the first base end portion E1 of the first element section 412A is wider than the width of the first element section 412A on the proximal side with respect to the first base end portion E1 of the first element section 412A.

[0038] The second element section 414A extends substantially parallel to the upper surface of the base 102A from the first base end portion E1 of the second element section 414A to the corner portion on the third diagonal direction D3 side of the surrounding wall 110A. The second element section 414A has a bifurcated tip at the corner portion on the third diagonal direction D3 side of the surrounding wall 110A. The bifurcated tip of the second element section 414A is open. One of the bifurcated tips of the second element section 414A is bent upward along a side substantially parallel to the first direction X of the corner portion on the third diagonal direction D3 side of the surrounding wall 110A. The other of the bifurcated tips of the second element section 414A is bent upward along a side substantially parallel to the second direction Y of the corner portion on the third diagonal direction D3 side of the surrounding wall 110A.

[0039] The second element section 414A includes a portion that operates as a self-similar antenna or an antenna similar thereto. Specifically, when viewed from above, the width of the second element section 414A widens as it extends from the first base end portion E1 of the second element section 414A toward the branched tip of the second element section 414A. Therefore, when viewed from above, the width of the second element section 414A on the distal side with respect to the first base end portion E1 of the second element section 414A is wider than the width of the second element section 414A on the proximal side with respect to the first base end portion E1 of the second element section 414A.

[0040] The second element 420A operates as a self-similar antenna or an antenna similar thereto. In Embodiment 1, the second element 420A operates as a bowtie antenna.

[0041] Each of the third element section 422A and the fourth element section 424A is made of sheet metal. The third element section 422A is attached to the lower surface of the cover plate 302A and the corner portion on the first diagonal direction D1 side of the side wall 304A. The fourth element section 424A is attached to the lower surface of the cover plate 302A and the corner portion on the second diagonal direction D2 side of the side wall 304A. In this way, the second element 420A is housed in the inner case 300A.

[0042] When viewed from above, the second element 420A is arranged in a state rotated approximately 90 degrees with respect to the first element 410A. "Approximately 90 degrees" does not only mean that the second element 420A is arranged in a state rotated exactly 90 degrees with respect to the first element 410A. "Approximately 90 degrees" also means, for example, that the second element 420A is arranged in a state rotated by an angle deviated from 90 degrees due to a tolerance or the like with respect to the first element 410A. However, the arrangement of the first element 410A and the second element 420A is not limited to the above-described example. For example, when viewed from above, if the base 102A has a shape different from a substantially square shape, the second element 420A may be arranged in a state rotated by an angle different from approximately 90 degrees with respect to the first element 410A.

[0043] Each of the third element section 422A and the fourth element section 424A has a second base end E2. At the second base end E2, the third element section 422A and the fourth element section 424A are closest to each other. Also, the second base end E2 includes a power supply point connected to one end of the second cable 520A. When viewed from above, the second base end E2 overlaps with the approximate center of the first direction X and the second direction Y of the base 102A.

[0044] The third element section 422A extends substantially parallel to the lower surface of the cover plate 302A from the second base end E2 of the third element section 422A to the corner on the first diagonal direction D1 side of the side wall 304A. The third element section 422A has a bifurcated tip at the corner on the first diagonal direction D1 side of the side wall 304A. The bifurcated tip of the third element section 422A is open. One of the bifurcated tips of the third element section 422A is bent downward along the side parallel to the first direction X of the corner on the first diagonal direction D1 side of the side wall 304A. The other of the bifurcated tips of the third element section 422A is bent downward along the side parallel to the second direction Y of the corner on the first diagonal direction D1 side of the side wall 304A.

[0045] The third element section 422A includes a portion that operates as a self-similar antenna or an antenna similar thereto. Specifically, when viewed from below, the width of the third element section 422A widens from the second base end E2 of the third element section 422A toward the bifurcated tip of the third element section 422A. Therefore, when viewed from below, the width of the third element section 422A on the distal side with respect to the second base end E2 of the third element section 422A is wider than the width of the third element section 422A on the proximal side with respect to the second base end E2 of the third element section 422A.

[0046] The fourth element section 424A extends substantially parallel to the lower surface of the cover plate 302A from the second base end portion E2 of the fourth element section 424A to the corner portion on the second diagonal direction D2 side of the side wall 304A. The fourth element section 424A has a bifurcated tip at the corner portion on the second diagonal direction D2 side of the side wall 304A. The bifurcated tip of the fourth element section 424A is open. One of the bifurcated tips of the fourth element section 424A is bent downward along a side substantially parallel to the first direction X of the corner portion on the second diagonal direction D2 side of the side wall 304A. The other of the bifurcated tips of the fourth element section 424A is bent downward along a side substantially parallel to the second direction Y of the corner portion on the second diagonal direction D2 side of the side wall 304A.

[0047] The fourth element section 424A includes a portion that operates as a self-similar antenna or an antenna similar thereto. Specifically, when viewed from below, the width of the fourth element section 424A widens from the second base end portion E2 of the fourth element section 424A toward the bifurcated tip of the fourth element section 424A. Therefore, when viewed from below, the width of the fourth element section 424A on the distal side with respect to the second base end portion E2 of the fourth element section 424A is wider than the width of the fourth element section 424A on the proximal side with respect to the second base end portion E2 of the fourth element section 424A.

[0048] As described above, at least a part of the antenna element 400A is attached to the inner case 300A. Therefore, the inner case 300A serves as a support for supporting at least a part of the antenna element 400A. In Embodiment 1, the second element 420A is attached to the inner case 300A. Note that the support to which the second element 420A is attached may not be the inner case 300A. That is, the antenna device 10A may include a support different from the inner case 300A instead of or in addition to the inner case 300A.

[0049] The first cable 510A is a coaxial cable. The first cable 510A is electrically connected to the first element 410A. In Embodiment 1, one end of the first cable 510A on the first element 410A side is connected to the upper surfaces of the first base ends E1 of each of the first element section 412A and the second element section 414A by soldering. However, the electrical connection between the first cable 510A and the first element 410A may be a connection different from soldering. The first cable 510A is drawn out from the housing 100A through the first grommet 210A to the outside in the positive direction of the first direction X of the housing 100A.

[0050] The first ferrite core 512A is provided to suppress the noise current flowing through the first cable 510A. The first ferrite core 512A is provided on the negative direction side of the first direction X with respect to the first grommet 210A. The first ferrite core 512A is positioned by the first support claw 150A. The first support claw 150A is provided on the upper surface of the base 102A and penetrates the first element section 412A in the positive direction of the third direction Z. The first support claw 150A supports both sides of the first ferrite core 512A in the first direction X. When viewed from above, the first ferrite core 512A is substantially parallel to the first direction X. When viewed from the second direction Y, the first ferrite core 512A is substantially parallel to the first direction X.

[0051] The second cable 520A is a coaxial cable. The second cable 520A is electrically connected to the second element 420A. In Embodiment 1, one end of the second cable 520A on the second element 420A side is connected to the lower surfaces of the second base ends E2 of each of the third element section 422A and the fourth element section 424A by soldering. However, the electrical connection between the second cable 520A and the second element 420A may be a connection different from soldering. The second cable 520A is drawn out from the housing 100A through the second grommet 220A to the outside in the positive direction of the first direction X of the housing 100A.

[0052] The second ferrite core 522A is provided to suppress the noise current flowing through the second cable 520A. The second ferrite core 522A is provided on the negative side in the first direction X with respect to the second grommet 220A. The second ferrite core 522A is positioned by a second support claw 350A shown in FIG. 7 described later. The second support claw 350A is provided on the lower surface of the cover plate 302A and penetrates the third element section 422A in the negative side in the third direction Z. The second support claw 350A supports both sides of the second ferrite core 522A in the first direction X. When viewed from below, the second ferrite core 522A is substantially parallel to the first direction X. When viewed from the second direction Y, the second ferrite core 522A is substantially parallel to the first direction X.

[0053] Next, with reference to FIGS. 3 to 5, details of the waterproof sealing material 202A will be described. Note that the first cable 510A shown in FIG. 5 is hatched with the entire first cable 510A including the core wire, braid, etc. of the first cable 510A as one solid.

[0054] In FIGS. 3 to 5, the first position P1 indicates the position in the third direction Z of the lowermost end of the pressing rib 130A. The second position P2 indicates the position in the third direction Z of the upper surface of the portion of the waterproof pad 200A that is not pressed by the pressing rib 130A.

[0055] As shown in FIG. 3, at least a part of the waterproof sealing material 202A is embedded in a groove provided on the upper surface of the base 102A. As shown in FIGS. 3 to 5, the case 104A has a pressing rib 130A. The upper surface of the waterproof sealing material 202A is compressed in the third direction Z by the pressing rib 130A over the entire circumference of the waterproof sealing material 202A. The thickness of the waterproof sealing material 202A compressed in the third direction Z by the pressing rib 130A is, for example, 90% or less of the thickness of the waterproof sealing material 202A not compressed in the third direction Z. Therefore, the area surrounded by the waterproof sealing material 202A can be waterproofed when viewed from above.

[0056] The pressing rib 130A has a tip that contacts the upper surface of the waterproof sealing material 202A. As shown in FIGS. 3 and 5, the tip of the pressing rib 130A has an inclined surface 132A facing the inside of the housing 100A. The inclined surface 132A is inclined toward the side opposite to the inside of the housing 100A as it goes from the upper part of the pressing rib 130A to the lowermost end of the first position P1 of the pressing rib 130A. For example, in the cross section shown in FIG. 3, the inclined surface 132A is inclined toward the negative direction of the second direction Y as it goes from the positive direction side of the third direction Z of the pressing rib 130A toward the first position P1. Also, in the cross section shown in FIG. 5, the inclined surface 132A is inclined toward the positive direction of the first direction X as it goes from the positive direction side of the third direction Z of the pressing rib 130A toward the first position P1. In this case, compared with the case where the surface on which the inclined surface 132A of the pressing rib 130A is provided is parallel to the third direction Z, it is possible to suppress the pressing rib 130A from spreading to the outside of the housing 100A when the pressing rib 130A presses the waterproof pad 200A. Note that the shape of the tip of the pressing rib 130A is not limited to the shape according to Embodiment 1. For example, the surface on which the inclined surface 132A of the pressing rib 130A is provided may be substantially parallel to the third direction Z.

[0057] Next, with reference to FIG. 5, the details of the first grommet 210A will be described. The matters to be described below regarding the first grommet 210A can be similarly applied to the second grommet 220A.

[0058] The first grommet 210A is provided so as to penetrate the communication hole 108A provided in the housing 100A in the first direction X.

[0059] The first grommet 210A has a plurality of waterproof ribs 212A. Each waterproof rib 212A is made of an elastic material such as rubber, for example. Each waterproof rib 212A has a substantially annular shape when viewed from the first direction X. In the example shown in FIG. 5, three waterproof ribs 212A are arranged in the first direction X. Each waterproof rib 212A has a tip that presses against the outer surface of the first cable 510A. When viewed from the first direction X, the diameter of the region surrounded by the tips of each waterproof rib 212A is smaller than the diameter of the first cable 510A. Therefore, a gap through which water can penetrate is not formed between the tip of the waterproof rib 212A and the outer surface of the first cable 510A.

[0060] In the example shown in FIG. 5, when viewed from the first direction X, the inner diameter of a part of the first grommet 210A is larger than the diameter of the first cable 510A. Specifically, between the waterproof ribs 212A adjacent to each other in the first direction X, when viewed from the first direction X, the inner diameter of the first grommet 210A is larger than the diameter of the first cable 510A. Also, in at least a part of the region located on the negative direction side of the first direction X with respect to the waterproof rib 212A located on the most negative direction side of the first direction X among the three waterproof ribs 212A, when viewed from the first direction X, the inner diameter of the first grommet 210A is larger than the diameter of the first cable 510A. Further, in at least a part of the region located on the positive direction side of the first direction X with respect to the waterproof rib 212A located on the most positive direction side of the first direction X among the three waterproof ribs 212A, when viewed from the first direction X, the inner diameter of the first grommet 210A is larger than the diameter of the first cable 510A. Therefore, compared with the case where the inner diameter of the first grommet 210A is equal to or less than the diameter of the first cable 510A in any part of the first grommet 210A, the first cable 510A can be more easily passed through the first grommet 210A. Although an example in which three waterproof ribs 212A are formed has been described, the number of waterproof ribs 212A may be one or two, or may be four or more.

[0061] Each waterproof rib 212A is provided at a position shifted in the positive direction of the first direction X from a portion overlapping with the pressing rib 130A of the waterproof pad 200A in the third direction Z. That is, each waterproof rib 212A is provided at a position shifted from a portion compressed by the housing 100A of the waterproof pad 200A. In this case, even if the waterproof pad 200A is pressed in the third direction Z by the pressing rib 130A, the waterproof rib 212A can be prevented from being crushed and deformed in the third direction Z. Therefore, it is possible to suppress the generation of a gap between the inner surface of the waterproof rib 212A and the outer surface of the first cable 510A due to the deformation of the waterproof rib 212A. For this reason, it is possible to prevent water from entering the inside of the housing 100A through the gap.

[0062] Note that the method by which the first grommet 210A presses the outer surface of the first cable 510A is not limited to the example shown in FIG. 5. For example, the first grommet 210A may not have the waterproof rib 212A. In this case, the inner diameter of the first grommet 210A may be equal to or less than the diameter of the first cable 510A at any portion of the first grommet 210A. Also in this example, the first grommet 210A may press the first cable 510A at a position shifted from a portion compressed by the housing 100A of the waterproof sealing material 202A. Thereby, it is possible to prevent water from entering the inside of the housing 100A as described above.

[0063] The first grommet 210A has a large-diameter portion 214A located on the positive side in the first direction X with respect to the end face on the positive side in the first direction X of the housing 100A. When viewed from the first direction X, the outer diameter of the large-diameter portion 214A is larger than the diameter of the communication hole 108A. For this reason, when viewed from the positive side in the first direction X, the periphery of the communication hole 108A on the side face on the positive side in the first direction X of the housing 100A can be covered by the large-diameter portion 214A. Therefore, it is possible to make it difficult for water to enter the communication hole 108A from the periphery of the communication hole 108A on the side face on the positive side in the first direction X of the housing 100A when viewed from the positive side in the first direction X. Specifically, when the large-diameter portion 214A is provided, it is possible to make it more difficult for direct water such as drainage water to enter the communication hole 108A compared to the case where the large-diameter portion 214A is not provided. That is, the large-diameter portion 214A functions to reduce the water pressure in drainage and the like.

[0064] Figs. 6 to 8 are diagrams for explaining an example of the assembling method of the antenna device 10A according to Embodiment 1. With reference to Figs. 6 to 8, an example of the assembling method of the antenna device 10A will be described. In Fig. 7, when viewed from in front of the paper surface, the arrow indicating the third direction Z exists behind the arrow indicating the second direction Y.

[0065] As shown in Fig. 6, the waterproof pad 200A, the first element 410A, the first cable 510A, and the first ferrite core 512A are attached to the base 102A. One end of the first cable 510A is connected by soldering to the upper surface of each of the first base ends E1 of the first element section 412A and the second element section 414A. The first cable 510A is drawn out from the base 102A through the first grommet 210A to the positive side in the first direction X of the base 102A. The first ferrite core 512A is positioned by the first support claw 150A.

[0066] As shown in FIG. 7, the second element 420A, the second cable 520A, and the second ferrite core 522A are attached to the inner case 300A. One end of the second cable 520A is connected by soldering to the lower surface (the surface on the negative side in the third direction Z) of the second base end portion E2 of each of the third element section 422A and the fourth element section 424A. The second ferrite core 522A is positioned by the second support claws 350A. Note that the process shown in FIG. 7 may be performed simultaneously with the process shown in FIG. 6, or may be performed before or after the process shown in FIG. 6.

[0067] Next, as shown in FIG. 8, the second cable 520A is drawn out through the second grommet 220A to the positive side in the first direction X of the base 102A, and the inner case 300A is attached to the base 102A. For example, after the second cable 520A is drawn out through the second grommet 220A to the positive side in the first direction X of the housing 100A, the inner case 300A is attached to the base 102A. Next, if necessary, the extra length of the second cable 520A is further drawn out through the second grommet 220A to the positive side in the first direction X of the base 102A. When attaching the inner case 300A to the base 102A, the inner case 300A can be positioned by the two positioning pins 112A shown in FIG. 6. Also, the inner case 300A can be mechanically joined to the base 102A by the four joining claws 312A shown in FIG. 7.

[0068] In the state shown in FIG. 8, the case 104A is not attached to the base 102A. Therefore, before the case 104A is attached to the base 102A, it is possible to confirm whether various components mounted on the base 102A are properly arranged. Therefore, it is possible to facilitate the confirmation of whether the various components are properly arranged as compared with the case where the confirmation is made after the case 104A is attached to the base 102A.

[0069] For example, when the case 104A is not attached to the base 102A, the first cable 510A and the second cable 520A on the base 102A are not hidden by the case 104A. Therefore, it is possible to easily check whether the first cable 510A and the second cable 520A on the base 102A are arranged at appropriate positions as compared with the state after the case 104A is attached to the base 102A.

[0070] Also, when the case 104A is not attached to the base 102A, a portion not covered by the stopper 316A of the first ferrite core 512A is visible from above. Also, when the case 104A is not attached to the base 102A, at least a part of the second ferrite core 522A is visible from above through the exposed hole 318A. Therefore, it is possible to easily check whether the first ferrite core 512A and the second ferrite core 522A are provided at appropriate positions as compared with the state after the case 104A is attached to the base 102A.

[0071] Furthermore, when the case 104A is not attached to the base 102A, the waterproof pad 200A is not hidden by the case 104A. Therefore, it is possible to easily check whether the waterproof pad 200A is properly arranged, such as whether it is twisted or rolled, as compared with the state after the case 104A is attached to the base 102A.

[0072] After checking whether various components mounted on the base 102A are properly arranged, the case 104A is attached to the base 102A. When attaching the case 104A to the base 102A, the base 102A and the case 104A are fixed to each other by the screw 106A, thereby pressing the upper surface of the waterproof sealing material 202A by the pressing rib 130A. As a result, the area surrounded by the waterproof sealing material 202A is waterproofed when viewed from above.

[0073] In this way, the antenna device 10A is assembled.

[0074] The method of assembling the antenna device 10A is not limited to the example described with reference to FIGS. 6 to 8.

[0075] For example, before connecting one end of the second cable 520A to each of the second base ends E2 of the third element section 422A and the fourth element section 424A, the inner case 300A in a state where the second element 420A is attached may be stood substantially perpendicular to the base 102A by a jig (not shown). With the inner case 300A standing substantially perpendicular to the base 102A, one end of the second cable 520A is connected to each of the second base ends E2 of the third element section 422A and the fourth element section 424A. Also, the second cable 520A is drawn out from the base 102A through the second grommet 220A. Next, the inner case 300A is tilted toward the base 102A by the above-described jig and the inner case 300A is attached to the base 102A. Also in this method, before the case 104A is attached to the base 102A, it is possible to confirm whether various components mounted on the base 102A are appropriately arranged.

[0076] Next, an example of the usage method of the antenna device 10A will be described.

[0077] The antenna device 10A is used outdoors, for example. However, the antenna device 10A may also be used indoors. When the antenna device 10A is used outdoors, the antenna device 10A may be exposed to moisture such as rain and snow. However, in the antenna device 10A, waterproofing is achieved by the waterproof pad 200A. Therefore, even if the antenna device 10A is exposed to moisture such as rain and snow, it does not interfere with the operation of the antenna device 10A. The antenna device 10A is mounted on a vehicle, for example. Alternatively, the antenna device 10A is provided in a vending machine installed outdoors, a ticket vending machine installed in an outdoor coin parking lot, or the like. When the antenna device 10A is provided on the housing of a vending machine, a ticket vending machine, or the like, the antenna device 10A can be provided outside the housing instead of inside the housing. However, the use of the antenna device 10A is not limited to these examples.

[0078] (Embodiment 2) FIG. 9 is a perspective view of the antenna device 10B according to Embodiment 2 with the case 104B removed. FIG. 10 is a view obtained by removing the case 104B and the inner case 300B from FIG. 9. The antenna device 10B according to Embodiment 2 is the same as the antenna device 10A according to Embodiment 1, except for the following points.

[0079] The housing 100B according to Embodiment 2 has a base 102B and a case 104B in the same manner as the housing 100A according to Embodiment 1. A surrounding wall 110B is provided on the base 102B according to Embodiment 2 in the same manner as the base 102A according to Embodiment 1. The waterproof pad 200B according to Embodiment 2 has a waterproof sealing material 202B, a first grommet 210B, and a second grommet 220B in the same manner as the waterproof pad 200A according to Embodiment 1. The inner case 300B according to Embodiment 2 has a cover plate 302B and a side wall 304B in the same manner as the inner case 300A according to Embodiment 1. The antenna element 400B according to Embodiment 2 has a first element 410B and a second element 420B in the same manner as the antenna element 400A according to Embodiment 1. The first element 410B according to Embodiment 2 includes a first element section 412B and a second element section 414B in the same manner as the first element 410A according to Embodiment 1. The second element 420B according to Embodiment 2 includes a third element section 422B and a fourth element section 424B in the same manner as the second element 420A according to Embodiment 1.

[0080] As shown in FIG. 10, a through hole 440B is provided in the third element section 422B according to Embodiment 2. The through hole 440B is located on the first diagonal direction D1 side with respect to the second base end portion E2 of the third element section 422B. One end of the second cable 520B on the second element 420B side is connected to the upper surfaces of the second base end portions E2 of the third element section 422B and the fourth element section 424B by soldering. A part drawn out from the first base end portion E1 of the second cable 520B passes through the through hole 440B.

[0081] As shown in FIG. 9, an opening 340B is provided on the upper surface of the cover plate 302B according to Embodiment 2. The opening 340B penetrates the cover plate 302B in the third direction Z. When viewed from above, the opening 340B has a central portion 342B and an extending portion 344B.

[0082] When viewed from above, the central portion 342B is located approximately at the center of the inner case 300B. Also, when viewed from above, the central portion 342B has a substantially square shape with a pair of sides substantially parallel to the first diagonal direction D1 and the second diagonal direction D2 and a pair of sides substantially parallel to the third diagonal direction D3 and the fourth diagonal direction D4. However, the central portion 342B may have a shape different from the substantially square shape. At least a part of the connection portions of the second base ends E2 of the third element section 422B and the fourth element section 424B, and one end of the second element 420B of the second cable 520B are exposed from the central portion 342B.

[0083] When viewed from above, the extending portion 344B extends from the side of the central portion 342B on the first diagonal direction D1 side toward the corner on the first diagonal direction D1 side of the antenna element 400B. At least a part of the extending portion 344B overlaps at least a part of the through hole 440B in the third direction Z.

[0084] FIGS. 11 and 12 are diagrams for explaining an example of an assembling method of the antenna device 10B according to Embodiment 2. With reference to FIGS. 11 and 12, an example of an assembling method of the antenna device 10B according to Embodiment 2 will be described.

[0085] As shown in FIG. 11, the waterproof pad 200B, the first element 410B, the first cable 510B, the first ferrite core 512B, the second cable 520B, and the second ferrite core 522B are attached to the base 102B.

[0086] In the state shown in FIG. 11, one end of the first cable 510B is connected by soldering to the upper surfaces of the first base ends E1 of the first element section 412B and the second element section 414B.

[0087] In the state shown in FIG. 11, the first cable 510B is drawn out from the base 102B through the first grommet 210B to the positive direction side in the first direction X of the base 102B. The first ferrite core 512B is positioned by the first support claw 152B. The first support claw 152B supports both sides of the first ferrite core 512B in the first direction X. When viewed from above, the first ferrite core 512B is substantially parallel to the first direction X. Also, when viewed from the second direction Y, the first ferrite core 512B is substantially parallel to the first direction X.

[0088] In the state shown in FIG. 11, the second cable 520B is drawn out from the base 102B through the second grommet 220B to the positive direction side in the first direction X of the base 102B. The second ferrite core 522B is positioned by the second support claw 154B. The second support claw 154B supports both sides of the second ferrite core 522B in the first direction X. When viewed from above, the second ferrite core 522B is substantially parallel to the first direction X. Also, when viewed from the second direction Y, the second ferrite core 522B is inclined upward as it goes from the positive direction of the first direction X to the negative direction of the first direction X. The length of the second cable 520B on the base 102B is adjusted to a predetermined length. Also, one end of the second cable 520B on the base 102B is directed upward.

[0089] Next, as shown in FIG. 12, the inner case 300B is attached to the base 102B. When attaching the inner case 300B to the base 102B, one end of the second cable 520B directed upward is passed through the through hole 440B and the opening 340B in the third direction Z. Next, the one end of the second cable 520B is tilted toward the second base end E2 of the second element 420B. Next, the one end of the second cable 520B is connected to the second base end E2 of each of the third element section 422B and the fourth element section 424B by soldering. In Embodiment 2, the soldering operation can be performed inside the central portion 342B.

[0090] Also in Embodiment 2, in the same manner as in Embodiment 1, before the case 104B is attached to the base 102B, it is possible to confirm whether various components mounted on the base 102B are appropriately arranged. After confirming that the various components mounted on the base 102B are appropriately arranged, the case 104B is attached to the base 102B. Thereby, the antenna device 10B according to Embodiment 2 is assembled.

[0091] Next, Embodiment 1 and Embodiment 2 are compared.

[0092] In Embodiment 1, the second ferrite core 522A is attached to the inner case 300A. Therefore, in Embodiment 1, compared with Embodiment 2, the symmetry between the first element 410A and the second element 420A is good.

[0093] In Embodiment 2, after adjusting the length of the second cable 520B on the base 102B to a predetermined length, one end of the second cable 520B is connected to the second base end E2 of each of the first element section 412B and the second element section 414B. For this reason, after connecting one end of the second cable 520B to the second base end E2 of each of the first element section 412B and the second element section 414B, it is not necessary to draw out the excess length of the second cable 520B. Therefore, in Embodiment 2, compared with Embodiment 1, the workability of assembling the antenna device 10B is good.

[0094] (Embodiment 3) FIG. 13 is an enlarged perspective view of a part of the antenna device 10C according to Embodiment 3 with the case removed. The antenna device 10C according to Embodiment 3 is the same as the antenna device 10A according to Embodiment 1 or the antenna device 10B according to Embodiment 2 except for the following points.

[0095] On the positive side of the base 102C in the positive direction of the first direction X according to Embodiment 3, a support base 160C is provided. When viewed from above, the width of the support base 160C in the second direction Y becomes narrower as it goes from the negative side to the positive side of the first direction X. Specifically, when viewed from above, the support base 160C has a substantially trapezoidal shape with an upper base and a lower base that are substantially parallel to the second direction Y. On the upper surface side of the support base 160C, the portion of the first cable 510C drawn out from the first grommet 210C to the positive side of the first direction X and the portion of the second cable 520C drawn out from the second grommet 220C to the positive side of the first direction X are bundled together. The distance between the portion of the first cable 510C and the portion of the second cable 520C in the second direction Y becomes narrower as it goes from the negative side to the positive side of the first direction X. Also, the support base 160C, the portion of the first cable 510C provided on the upper surface side of the support base 160C, and the portion of the second cable 520C provided on the upper surface side of the support base 160C may or may not be covered by a case not shown in FIG. 13.

[0096] In Embodiment 3, the portion of the first cable 510C drawn out from the first grommet 210C to the positive side of the first direction X and the portion of the second cable 520C drawn out from the second grommet 220C to the positive side of the first direction X are drawn out from substantially the same location on the positive side of the end of the support base 160C in the first direction X to the positive side of the first direction X. Thereby, compared with the form in which the first cable 510C and the second cable 520C are not bundled by the support base 160C, breakage of the first cable 510C and the second cable 520C can be prevented. By bundling the first cable 510C and the second cable 520C with the support base 160C, the cable routing of the first cable 510C and the second cable 520C when using the antenna device 10C can be facilitated. By being covered by a case not shown in FIG. 13, the first grommet 210C and the second grommet 220C are not directly exposed to moisture such as rain and snow, and the first grommet 210C and the second grommet 220C are less likely to deteriorate, leading to an improvement in waterproof performance.

[0097] The embodiments of the present invention have been described above with reference to the drawings. These are examples of the present invention, and various configurations other than those described above can also be adopted.

[0098] For example, the antenna device according to each embodiment includes an antenna element connected to two cables. However, the matters described in each embodiment are also applicable to, for example, an antenna device including a GNSS (Global Navigation Satellite System) antenna connected to one cable.

[0099] Further, in the antenna device according to each embodiment, a surrounding wall that surrounds the regions where the inner case, the antenna element, the first ferrite core, and the second ferrite core are disposed is provided on the base. However, the surrounding wall may be provided on the case instead of the base.

[0100] According to this specification, the following aspects are provided. (Aspect 1.1) Aspect 1.1 is a housing, a support body housed in the housing, an antenna element housed in the housing and at least a part of which is attached to the support body, and an antenna device comprising the same. According to Aspect 1.1, it is possible to confirm whether various components are appropriately arranged before the various components are housed in the housing. Therefore, it is possible to facilitate the confirmation of whether the various components are appropriately arranged as compared with the case where the confirmation is made after the various components are housed in the housing. (Aspect 1.2) Aspect 1.2 is the antenna device according to Aspect 1.1, further comprising a waterproof pad surrounding at least a part of the antenna element. According to Aspect 1.2, it is possible to waterproof the periphery of the antenna element in the housing. Further, before the antenna element is housed in the housing, it is possible to check whether the waterproof pad is appropriately arranged. (Aspect 1.3) Aspect 1.3 is the antenna device according to Aspect 1.2, further comprising a cable electrically connected to the antenna element and drawn out from the housing through at least a part of the waterproof pad. According to Aspect 1.3, it is possible to waterproof the portion through which the cable passes in the housing. Further, before the antenna element is housed in the housing, it is possible to check whether the cable is arranged at an appropriate position. (Aspect 1.4) Aspect 1.4 is the antenna device according to Aspect 1.3, wherein a part of the cable passes through a through hole provided in the antenna element. According to Aspect 1.4, after attaching at least a part of the antenna element to a part of the housing, the cable can be connected to the antenna element. Therefore, after adjusting the length of the cable inside the housing to a predetermined length, the cable can be connected to the antenna element. For this reason, after connecting the cable to the antenna element, there is no need to draw out the excess length of the cable. (Aspect 1.5) Aspect 1.5 is the antenna device according to Aspect 1.3 or Aspect 1.4, wherein an opening exposing at least a part of the connection portion between the cable and the antenna element is provided in the support. According to Aspect 1.5, the operation of connecting the cable and the antenna element can be carried out inside the opening. (Aspect 1.6) Aspect 1.6 is the antenna device according to any one of Aspects 1.3 to 1.5, further comprising a ferrite core provided on the cable and at least a part of which is exposed from the support. According to Aspect 1.6, it is possible to check whether the ferrite core is provided at an appropriate position before the antenna element is housed in the housing. (Aspect 1.7) Aspect 1.7 is the antenna device according to any one of Aspects 1.1 to 1.6, wherein after at least a part of the antenna element is attached to the support, the support is housed in the housing. According to Aspect 1.7, it is possible to check whether various components are appropriately arranged in a state where at least a part of the antenna element is attached to the support before the support is housed in the housing. (Aspect 2.1) Aspect 2.1 is a housing, an antenna element housed in the housing, a cable electrically connected to the antenna element, a waterproof pad surrounding at least a part of the antenna element, and comprising the antenna device, wherein the waterproof pad has a grommet through which the cable passes. According to Aspect 2.1, the part of the waterproof pad surrounding at least a part of the antenna element and the grommet can be integrated. Therefore, compared with the case where the part of the waterproof pad surrounding at least a part of the antenna element and the grommet are separate bodies, the number of parts of the member for waterproofing the periphery of the antenna element in the housing and the member for waterproofing the part through which the cable passes in the housing can be reduced. (Aspect 2.2) Aspect 2.2 is the antenna device according to Aspect 2.1, wherein the grommet presses the cable at a position displaced from the portion compressed by the housing of the waterproof pad. According to Aspect 2.2, even if the waterproof pad is compressed by the housing, the pressed portion of the grommet cable can be prevented from deforming. Therefore, the generation of a gap between the pressed portion and the cable due to the deformation of the pressed portion can be suppressed. For this reason, water can be prevented from entering the inside of the housing through the gap. (Aspect 2.3) Aspect 2.3 is the antenna device according to Aspect 2.1 or 2.2, wherein the inner diameter of a part of the grommet is larger than the diameter of the cable. According to Aspect 2.3, it is possible to make it easier to pass the cable through the grommet as compared with the case where the inner diameter of the grommet is equal to or less than the diameter of the cable at any part of the grommet. (Aspect 2.4) Aspect 2.4 is the housing has ribs that press at least a part of the waterproof pad, and the tip of the rib has an inclined surface directed toward the inside of the housing, and is the antenna device according to any one of Aspects 2.1 to 2.3. According to Aspect 2.4, it is possible to suppress the rib from spreading to the outside of the housing when the rib presses at least a part of the waterproof pad as compared with the case where the inclined surface at the tip of the second rib is not inclined.

Explanation of Signs

[0101] 10A Antenna device 10B Antenna device 10C Antenna device 100A Housing 100B Housing 102A Base 102B Base 102C Base 104A Case 104B Case 106A Screw 108A Communication hole 110A Surrounding wall 110B Surrounding wall 112A Positioning pin 130A Pressing rib 132A Inclined surface 150A First support claw 152B First support claw 154B Second support claw 160C Support stand 200A Waterproof pad 200B Waterproof pad 202A Waterproof sealing material 202B Waterproof sealing material 210A First grommet 210B First grommet 210C First grommet 212A Waterproof rib 214A Large-diameter part 220A Second grommet 220B Second grommet 220C Second grommet 300A Inner case 300B Inner case 302A Cover plate 302B Cover plate 304A Side wall 304B Side wall 312A Joining claw 314A Projection 316A Stopper 318A Exposed hole 340B Opening 342B Central part 344B Extension part 350A Second support claw 400A Antenna element 400B Antenna element 410A First element 410B First element 412A First element section 412B First element section 414A Second element section 414B Second element section 420A Second element 420B Second element 422A Third Element Section 422B Third Element Section 424A Fourth Element Section 424B Fourth Element Section 440B Through-Hole 510A First Cable 510B First Cable 510C First Cable 512A First Ferrite Core 512B First Ferrite Core 520A Second Cable 520B Second Cable 520C Second Cable 522A Second Ferrite Core 522B Second Ferrite Core D1 First Diagonal Direction D2 Second Diagonal Direction D3 Third Diagonal Direction D4 Fourth Diagonal Direction E1 First Base End E2 Second Base End P1 First Position P2 Second Position X First Direction Y Second Direction Z Third Direction

Claims

1. A housing, an antenna element housed in the housing, a cable electrically connected to the antenna element, a waterproof pad surrounding at least a part of the antenna element, and comprising the waterproof pad has a grommet through which the cable passes, the housing has a rib that presses against at least a part of the waterproof pad, an antenna device, wherein a tip of the rib has an inclined surface directed toward the inside of the housing.

2. The antenna device according to claim 1, wherein the grommet presses the cable at a position displaced from a portion compressed by the housing of the waterproof pad.

3. The antenna device according to claim 1 or 2, wherein an inner diameter of a part of the grommet is larger than a diameter of the cable.

Images