Antenna device

Abstract

To suppress generation of abnormal noise due to contact between an attachment body and a part of an antenna device attached to the attachment body.SOLUTION: An antenna device attached to an attachment body, the antenna device comprising: an elastic body; an antenna element; and a holding body that holds the elastic body, wherein the elastic body is at least partially located between the attachment body and the holding body in a state where the attachment body, the elastic body, and the antenna element are located on one side with respect to the holding body.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] In recent years, various antenna devices have been developed. For example, as described in Patent Document 1, an antenna device may include a circuit board, a patch antenna mounted on the upper surface of the circuit board, a shield cover provided on the lower surface of the circuit board, and a ground plate disposed below the shield cover. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-78901 Summary of the Invention [Problem to be solved by the invention]

[0004] An antenna device is sometimes attached to a mounting body such as a panel of an automobile. When the mounting body and the antenna device are attached to each other, if the mounting body and the portion of the antenna device attached to the mounting body are made of hard materials, it may be difficult to suppress the generation of abnormal noise due to contact between the mounting body and the portion of the antenna device attached to the mounting body.

[0005] One example of an object of the present invention is to suppress the generation of abnormal noise due to contact between a mounting body and a portion of an antenna device attached to the mounting body. Other objects of the present invention will become apparent from the description of this specification. [Means for solving the problem]

[0006] One aspect of the present invention is An antenna device attached to a mounting body, An elastic body; an antenna element; a holder that holds the elastic body; Equipped with This is an antenna device in which the mounting body, the elastic body, and the antenna element are positioned on one side of the holder, and the elastic body is positioned at least partially between the mounting body and the holder.

[0007] According to the above aspect of the present invention, it is possible to suppress the generation of abnormal noise due to contact between the mounting body and the portion of the antenna device that is mounted to the mounting body. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view of the antenna device according to the embodiment attached to a panel. [Figure 2] FIG. 2 is an exploded perspective view of the antenna device according to the embodiment in a state where it is removed from a panel. [Figure 3] FIG. 2 is a cross-sectional view taken along line AA in FIG. DETAILED DESCRIPTION OF THE INVENTION

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

[0010] Fig. 1 is a perspective view of the antenna device 10 according to the embodiment attached to a panel 2. Fig. 2 is an exploded perspective view of the antenna device 10 according to the embodiment removed from the panel 2. Fig. 3 is a cross-sectional view taken along line AA in Fig. 1. In Fig. 2, the panel 2 shown in Figs. 1 and 3 is omitted.

[0011] To explain the directions, the X direction, Y direction, and Z direction are defined. The Z direction is the height direction of the antenna device 10. The X direction is one of the horizontal directions perpendicular to the Z direction. The Y direction is one of the horizontal directions perpendicular to the Z direction and the X direction. In the embodiment, the X direction is described as the front-to-back direction, the Y direction is the left-to-right direction, and the Z direction is the up-down direction. In each figure, the directions indicated by the arrows of the X axis, Y axis, and Z axis, which respectively indicate the X direction, Y direction, and Z direction, are defined as the forward direction, left direction, and upward direction, respectively.

[0012] Hereinafter, unless otherwise specified, the +X side refers to the side indicated by the X-axis arrow, and the -X side refers to the side opposite the side indicated by the X-axis arrow. Hereinafter, unless otherwise specified, the +Y side refers to the side indicated by the Y-axis arrow, and the -Y side refers to the side opposite the side indicated by the Y-axis arrow. Hereinafter, unless otherwise specified, the +Z side refers to the side indicated by the Z-axis arrow, and the -Z side refers to the side opposite the side indicated by the Z-axis arrow. In Figure 3, the white circle with a black dot indicating the X-axis indicates that the X-axis arrow points toward the front of the page.

[0013] As shown in FIG. 1 , the antenna device 10 according to the embodiment is attached to a panel 2 arranged substantially perpendicular to the Z direction. The panel 2 is a conductor such as a metal plate that constitutes an automobile. In the embodiment, the panel 2 is at least a part of the rear header of the automobile. Examples of mounting bodies corresponding to the panel 2 to which the antenna device 10 is attached include not only rear headers but also front headers, back doors, instrument panels, and other panels of automobiles. Examples of objects that have mounting bodies corresponding to the panel 2 include not only automobiles but also motorcycles, ships, airplanes, drones, and other moving bodies, as well as non-moving bodies that are fixedly installed.

[0014] As shown in FIG. 2, the antenna device 10 according to the embodiment includes an elastic body 100, an antenna assembly 200, a case 300, a ground plate 400, and two screws 500.

[0015] 2, the elastic body 100 has an integrally molded elastic base 110, an elastic wall 120, and two elastic ribs 130. The elastic body 100 is a molded body made of an elastic material such as elastomer, synthetic rubber, or the like.

[0016] As shown in Fig. 2, the elastic base 110 is disposed substantially perpendicular to the Z direction. As shown in Fig. 2, when viewed from above, the elastic base 110 has a substantially rectangular shape with a pair of sides substantially parallel to the X direction, another pair of sides substantially parallel to the Y direction, and four rounded corners. The shape of the elastic base 110 is not limited to the example shown in Fig. 2.

[0017] As shown in Fig. 2, the elastic wall 120 is provided on the upper surface side of the elastic base 110. As shown in Fig. 2, when viewed from above, the elastic wall 120 is formed in a generally frame shape that is open toward the +X side. Hereinafter, the surrounded area of ​​the elastic wall 120 refers to the area surrounded by the elastic wall 120 when viewed from above. As shown in Fig. 2, when viewed from above, the surrounded area of ​​the elastic wall 120 has a pair of sides that are generally parallel to the X direction and a -X side that is generally parallel to the Y direction, and has a generally quadrangular shape that is open toward the +X side. The shape of the surrounded area of ​​the elastic wall 120 is not limited to the example shown in Fig. 2.

[0018] As shown in Fig. 2, two elastic ribs 130 are provided on the upper surface side of the elastic base 110. As shown in Fig. 2, when viewed from above, the two elastic ribs 130 are arranged approximately symmetrically on both sides in the Y direction with respect to the horizontal center of the elastic base 110. Specifically, as shown in Fig. 2, when viewed from above, the two elastic ribs 130 extend along the outer edge of the elastic base 110 with ends of the two elastic ribs 130 located in the front of the elastic base 110 facing each other in the Y direction, and ends of the two elastic ribs 130 located in the rear of the elastic base 110 facing each other in the Y direction. The number and shape of the elastic ribs 130 are not limited to the example shown in Fig. 2.

[0019] As shown in Fig. 2, the antenna assembly 200 includes a substrate 210, a GNSS (Global Navigation Satellite System) antenna 220, a shield cover 230, and a cable 240. Note that in Fig. 2, the shield cover 230 is hidden behind (below) the substrate 210 and is not visible in the perspective view of Fig. 2. The antenna assembly 200 may include another antenna, such as a SDARS (Satellite Digital Audio Radio Service) antenna, instead of or in addition to the GNSS antenna 220. The antenna assembly 200 may include an antenna other than a patch antenna, such as an antenna formed from sheet metal, instead of or in addition to a patch antenna such as the GNSS antenna 220.

[0020] The substrate 210 is, for example, a rigid substrate such as a printed circuit board (PCB). As shown in FIG. 2, the substrate 210 is disposed substantially perpendicular to the Z direction. As shown in FIG. 2, when viewed from above, the substrate 210 has a substantially rectangular shape with a pair of sides substantially parallel to the X direction and another pair of sides substantially parallel to the Y direction. The substrate 210 can be inserted into the surrounding area of ​​the elastic wall 120 from an opening on the +X side of the surrounding area of ​​the elastic wall 120 toward the -X side. As shown in FIG. 3, the substrate 210 is held by the elastic wall 120 in a state where the outer edge of the substrate 210 is at least partially inserted into a groove 122 provided on the inner surface of the elastic wall 120. With the elastic wall 120 holding the substrate 210, the elastic body 100 and the antenna assembly 200 are assembled to each other.

[0021] In the embodiment, the elastic body 100 holds the substrate 210. Therefore, the number of components of the antenna device 10 can be reduced compared to when the elastic body 100 and the structure for holding the substrate 210 are provided separately. Furthermore, when the elastic body 100 and the structure for holding the substrate 210 are provided separately, the elastic base 110 and the structure for holding the substrate 210 may be stacked on top of each other in the Z direction. In the embodiment, the antenna device 10 can be made lower in height in the Z direction compared to when the elastic base 110 and the structure for holding the substrate 210 are stacked on top of each other in the Z direction. The elastic base 110 and the structure for holding the substrate 210 may be provided separately. The structure for holding the substrate 210 may be a hard body such as resin.

[0022] The GNSS antenna 220 is an antenna element of the antenna assembly 200. As shown in Fig. 2 and Fig. 3, the GNSS antenna 220 is mounted on the upper surface side of the substrate 210. The GNSS antenna 220 according to the embodiment is a patch antenna. As shown in Fig. 2, when viewed from above, the GNSS antenna 220 has a substantially rectangular shape having a pair of sides substantially parallel to the X direction and another pair of sides substantially parallel to the Y direction. The shape of the GNSS antenna 220 is not limited to the example shown in Fig. 2.

[0023] As shown in FIG. 3, the shield cover 230 is disposed on the lower surface side of the -Z side of the substrate 210. As shown in FIG. 3, the substrate 210 is held by the elastic wall 120 with the upper surface of the +Z side of the elastic base 110 and the lower surface of the -Z side of the substrate 210 spaced apart from each other in the Z direction. Therefore, as shown in FIG. 3, the shield cover 230 can be positioned in the gap inside the enclosed area of ​​the elastic wall 120 between the upper surface of the +Z side of the elastic base 110 and the lower surface of the -Z side of the substrate 210. The shield cover 230 covers circuits such as a low-noise amplifier (LNA) provided on the lower surface side of the -Z side of the substrate 210. Therefore, the shield cover 230 can electrically shield (shield) the circuits provided on the lower surface side of the substrate 210. Therefore, degradation of the antenna performance of the antenna assembly 200 can be suppressed compared to when the above-mentioned circuits are not electrically shielded (shielded) by the shield cover 230.

[0024] The cable 240 is, for example, a coaxial cable. As shown in Fig. 2, one end of the cable 240 and the rear part of the substrate 210 are electrically connected to each other by joining such as soldering.

[0025] 2, the case 300 has a case body 310 and two arms 320. The case body 310 and the two arms 320 are integrally molded. The case 300 is, for example, a molded body made of a resin that is radio wave permeable.

[0026] As shown in FIG. 2, the case body 310 has a substantially rectangular box shape that is open toward the -Z side and has a substantially rectangular top plate on the +Z side that is substantially perpendicular to the Z direction, a pair of substantially rectangular side plates that are substantially perpendicular to the X direction, and another pair of substantially rectangular side plates that are substantially perpendicular to the Y direction. The +Z side top plate of the case body 310 covers the top surface of the GNSS antenna 220. The +X side side plate of the case body 310 covers the +X side side of the GNSS antenna 220 and the +X side opening of the enclosed area of ​​the elastic wall 120. The -X side plate of the case body 310 covers the -X side side of the GNSS antenna 220 and the -X side outer surface of the elastic wall 120. The Y direction side plates of the case body 310 cover both Y direction side surfaces of the GNSS antenna 220 and both Y direction outer surfaces of the elastic wall 120. In this state, the elastic base 110 and the case body 310 form a storage space for storing the substrate 210, the GNSS antenna 220, and the shield cover 230. As shown in Fig. 1, a cable 240 is drawn out from the lower end of the side plate on the -X side of the case body 310.

[0027] 2 and 3, the two arms 320 are provided approximately symmetrically on both sides in the Y direction of the case body 310. As shown in FIG. 3, each arm 320 includes a drawn-out portion 322, an expanded portion 324, and a tip portion 326.

[0028] 2 and 3, +Y side arm 320 will be described in a state where no external force in the Y direction is applied to +Y side widening portion 324 and +Y side tip 326. +Y side draw-out portion 322 is drawn out toward the +Y side from approximately the center of the +Y side edge of the +Z side upper plate of case body 310. +Y side widening portion 324 extends toward the -Z side from the +Y side end of +Y side draw-out portion 322. The -Y side inner surface of +Y side widening portion 324 is approximately parallel to the Z direction. The +Y side outer surface of +Y side widening portion 324 is inclined toward the +Y side as it approaches the -Z side. Therefore, the Y direction width of +Y side widening portion 324 increases as it approaches the -Z side. Therefore, the +Y-side widened portion 324 and the -Y-side widened portion 324 have a tapered shape in which the distance in the Y direction between the outer surfaces of the +Y-side widened portion 324 and the -Y-side widened portion 324 decreases upward on the +Z side. The +Y-side tip 326 protrudes downward on the -Z side from the -Z-side lower end of the +Y-side widened portion 324. The Y-direction width of the +Y-side tip 326 is approximately constant regardless of the position in the Z direction, with the -Y-side inner surface of the +Y-side widened portion 324 and the -Y-side inner surface of the +Y-side tip 326 being approximately flush with each other. Therefore, a +Y-side step surface 328 facing downward on the -Z side is formed between the lower end of the +Y-side outer surface of the +Y-side widened portion 324 and the upper end of the +Y-side outer surface of the +Y-side tip 326.

[0029] +Y-side widened portion 324 and +Y-side tip portion 326 are elastically supported by case main body 310 via +Y-side drawn-out portion 322. Specifically, +Y-side widened portion 324 and +Y-side tip portion 326 are configured to bend in the Y direction (toward the -Y side and the +Y side) due to the rounded, approximately right-angle bend between +Y-side drawn-out portion 322 and +Y-side widened portion 324. When no external force in the Y direction is applied to +Y-side widened portion 324 and +Y-side tip portion 326, +Y-side widened portion 324 and +Y-side tip portion 326 are approximately parallel to the Z direction. When an external force is applied to +Y side widened portion 324 and +Y side tip portion 326 in a direction toward the +Y side, +Y side widened portion 324 and +Y side tip portion 326 are urged toward the -Y side by the elasticity of the rounded, approximately right-angle bend between +Y side pull-out portion 322 and +Y side widened portion 324. When an external force is applied to +Y side widened portion 324 and +Y side tip portion 326 in a direction toward the -Y side, +Y side widened portion 324 and +Y side tip portion 326 are urged toward the +Y side by the elasticity of the rounded, approximately right-angle bend between +Y side pull-out portion 322 and +Y side widened portion 324.

[0030] Arm 320 on the −Y side is substantially the same as arm 320 on the +Y side, except that arm 320 on the +Y side and arm 320 on the −Y side are disposed substantially symmetrically with respect to case body 310 .

[0031] Hereinafter, unless otherwise specified, the two drawer sections 322 refer to the two drawer sections 322 located on both sides in the Y direction of the case body 310. The two widened sections 324 refer to the two widened sections 324 located on both sides in the Y direction of the case body 310. The two tip sections 326 refer to the two tip sections 326 located on both sides in the Y direction of the case body 310. The two step surfaces 328 refer to the two step surfaces 328 located on both sides in the Y direction of the case body 310.

[0032] The ground plate 400 serves as the ground portion of the GNSS antenna 220, with the GNSS antenna 220 and the ground plate 400 at least partially overlapping each other in the Z direction. The ground plate 400 is electrically grounded. The ground plate 400 is a conductor such as a metal plate. As shown in FIG. 2, the ground plate 400 is disposed substantially perpendicular to the Z direction. As shown in FIG. 2, when viewed from above, the ground plate 400 has a substantially rectangular shape with a pair of sides substantially parallel to the X direction, another pair of sides substantially parallel to the Y direction, and four rounded corners. The shape of the ground plate 400 is not limited to the example shown in FIG. 2. Alternatively, instead of the ground plate 400, a conductor that is electrically grounded and has a shape different from the plate shape may be provided as the ground portion of the GNSS antenna 220. As shown in FIG. 2, the elastic body 100, the antenna assembly 200, and the case 300 are located above the +Z side of the substantially horizontal center of the ground plate 400. The area of ​​the ground plate 400 perpendicular to the Z direction is larger than both the area of ​​the elastic base 110 perpendicular to the Z direction and the area of ​​the GNSS antenna 220 perpendicular to the Z direction. The area of ​​the ground plate 400 perpendicular to the Z direction may be equal to or smaller than the area of ​​the elastic base 110 perpendicular to the Z direction.

[0033] The ground plate 400 also serves as a holder that holds the elastic body 100. The ground plate 400 is capable of holding the elastic body 100 with the elastic body 100 positioned on the upper surface of the ground plate 400 on the +Z side. The holder that holds the elastic body 100 may be resin instead of or in addition to a conductor such as the ground plate 400. The resin used as the holder that holds the elastic body 100 does not need to be electrically grounded. When resin is used as the holder that holds the elastic body 100, the ground plate 400 does not need to be provided.

[0034] Two screws 500 are used to fasten the elastic body 100, the case 300, and the ground plate 400 together. As shown in FIG. 2 , two bosses 312 are provided at the lower end of the corner between the +X-side side plate of the case body 310 and the +Y-side side plate of the case body 310, and at the lower end of the corner between the -X-side side plate of the case body 310 and the -Y-side side plate of the case body 310. When the elastic body 100 and the case 300 are attached to each other, the two bosses 312 are inserted into two large-diameter holes 112 provided at positions eccentric to the +X-side and +Y-side and -X-side and -Y-side with respect to the horizontal center of the elastic base 110. Threaded holes into which two screws 500 can be screwed are provided on the lower surfaces of the two bosses 312. With the two bosses 312 inserted into the two large diameter holes 112, two screws 500 pass through two small diameter holes 402 provided at positions eccentric to the +X side and +Y side and the -X side and -Y side with respect to the horizontal center of the ground plate 400, and are screwed into screw holes on the bottom surfaces of the two bosses 312. With the two screws 500 screwed into the screw holes on the bottom surfaces of the two bosses 312, the elastic body 100, the case 300, and the ground plate 400 are fastened together. With the elastic body 100 and the antenna assembly 200 assembled together, the elastic body 100, the case 300, and the ground plate 400 are fastened together with the two screws 500, thereby assembling the elastic body 100, the antenna assembly 200, the case 300, and the ground plate 400 together.

[0035] 2 and 3, when the elastic body 100, the antenna assembly 200, the case 300, and the ground plate 400 are assembled together, each of the two tip portions 326 is disposed to pass through each of the two upper slits 114 and each of the two lower slits 404. The two upper slits 114 are provided in the elastic base 110 on both sides in the Y direction of a portion of the elastic base 110 that overlaps with the case main body 310 in the Z direction. The two lower slits 404 are provided in the ground plate 400 on both sides in the Y direction of a portion of the ground plate 400 that overlaps with the case main body 310 in the Z direction.

[0036] The following describes the attachment of the panel 2 and the antenna device 10. Unless otherwise specified, the outer side surfaces of the two widened portions 324 refer to the outer side surfaces of the two widened portions 324 in the Y direction, and the central inner side surfaces of the mounting hole 2a refer to the outer side surfaces of the mounting hole 2a in the Y direction at approximately the center of the mounting hole 2a in the X direction.

[0037] First, with the elastic body 100, antenna assembly 200, case 300 and ground plate 400 assembled together with two screws 500, the case 300 is inserted into the mounting hole 2a from below on the -Z side of the panel 2.

[0038] When no external force in the Y direction is applied to the two widened portions 324 and the two tip portions 326, the distance in the Y direction between the two central inner side surfaces of the mounting hole 2a is equal to or greater than the distance in the Y direction between the upper ends on the +Z side of the two outer surfaces of the two widened portions 324, and is less than the distance in the Y direction between the lower ends on the -Z side of the two outer surfaces of the two widened portions 324. Therefore, when the case 300 is inserted into the mounting hole 2a from below on the -Z side of the panel 2, the outer side surfaces of the two widened portions 324 can slide against the central inner side surfaces of the mounting hole 2a.

[0039] As the outer surfaces of the two widened portions 324 slide against the central inner surfaces of the mounting hole 2a, the two widened portions 324 receive forces from the central inner surfaces of the mounting hole 2a that move them toward each other, causing them to bend toward the case body 310. As the case 300 is pushed upward on the +Z side of the mounting hole 2a, the two widened portions 324 bend until the distance in the Y direction between the lower ends of the -Z sides of the outer surfaces of the two widened portions 324 becomes less than the width in the Y direction of the central inner surfaces of the mounting hole 2a. As the two widened portions 324 bend until the distance in the Y direction between the lower ends of the -Z sides of the outer surfaces of the two widened portions 324 becomes less than the width in the Y direction of the central inner surfaces of the mounting hole 2a, the lower ends of the -Z sides of the two widened portions 324 pass through the mounting hole 2a upward on the +Z side. In the example shown in Fig. 3, the tapered shape of both outer surfaces of the two widened portions 324 described above makes it easier for the two widened portions 324 to bend toward the case body 310 by both central inner surfaces of the mounting hole 2a, compared to when both outer surfaces of the two widened portions 324 are parallel to the Z direction. The shape of the two widened portions 324 is not limited to the example shown in Fig. 3. For example, both outer surfaces of the two widened portions 324 may be parallel to the Z direction.

[0040] 3, when +Y-side widened portion 324 and +Y-side tip portion 326 are approximately parallel to the Z direction, the -Y-side inner surface of +Y-side tip portion 326 is spaced a predetermined distance from the -Y-side inner surface of +Y-side upper slit 114 and the -Y-side inner surface of +Y-side lower slit 404. Therefore, even if +Y-side widened portion 324 and +Y-side tip portion 326 bend toward the -Y side when case 300 is inserted into mounting hole 2a from below on the -Z side of panel 2, mutual interference between the -Y-side inner surface of +Y-side tip portion 326 and the -Y-side inner surface of +Y-side upper slit 114, and mutual interference between the -Y-side inner surface of +Y-side tip portion 326 and the -Y-side inner surface of +Y-side lower slit 404 can be suppressed. The same applies to the +Y side inner surface of the -Y side widened portion 324, the +Y side inner surface of the -Y side upper slit 114, and the +Y side inner surface of the -Y side lower slit 404.

[0041] After the -Z side lower ends of the two widened portions 324 pass through the mounting hole 2a upward toward the +Z side, the two widened portions 324 and the two tip portions 326 are no longer subjected to external force from the central inner surface of the mounting hole 2a. Therefore, the two widened portions 324 and the two tip portions 326 are biased in directions away from each other and become approximately parallel to the Z direction by the elasticity of the rounded, approximately right-angle bend between the +Y side drawn-out portion 322 and the +Y side widened portion 324 and the elasticity of the rounded, approximately right-angle bend between the -Y side drawn-out portion 322 and the -Y side widened portion 324. After the lower ends on the -Z side of the two widening portions 324 pass through the mounting hole 2a toward the +Z side, and the two widening portions 324 and the two tip portions 326 become approximately parallel to the Z direction, the upper ends on the +Z side of the two tip portions 326 penetrate the mounting hole 2a in the Z direction, and the upper surface on the +Z side of the panel 2 and the two step surfaces 328 come into contact with each other on both sides of the Y direction of both central inner surfaces of the mounting hole 2a.

[0042] In the attachment of the panel 2 and the antenna device 10 in the embodiment, while the case 300 is inserted through the attachment hole 2a, the two widened portions 324 and the two tip portions 326 are bent toward the case body 310. When the lower ends of the two widened portions 324 on the -Z side pass through the attachment hole 2a toward the upper +Z side, the two widened portions 324 and the two tip portions 326 become approximately parallel to the Z direction. In the attachment of the panel 2 and the antenna device 10 in the embodiment, the panel 2 and the two arms 320 are mechanically joined to each other by snap fitting. By bending each arm 320 so as to suppress mutual interference between the panel 2 and each arm 320, the attachment of the panel 2 and the antenna device 10 can be facilitated.

[0043] As shown in Fig. 3, when the panel 2 and the antenna device 10 are attached to each other, the panel 2, elastic base 110, elastic wall 120, substrate 210, GNSS antenna 220, shield cover 230, and case main body 310 are located above the +Z side of the +Z side upper surface of the ground plate 400. As shown in Fig. 3, when the panel 2 and the antenna device 10 are attached to each other, the elastic base 110 is at least partially located between the -Z side lower surface of the panel 2 and the +Z side upper surface of the ground plate 400 around a portion of the elastic base 110 that overlaps with the mounting hole 2a in the Z direction. As shown in Fig. 3, in the cross section of the antenna device 10 taken along line AA, the elastic base 110 is at least partially located between the -Z side lower surface of the panel 2 and the +Z side upper surface of the ground plate 400 on both sides in the Y direction of the portion of the elastic base 110 that overlaps with the mounting hole 2a in the Z direction. If the elastic base 110 is not provided between the lower surface of the -Z side of the panel 2 and the upper surface of the +Z side of the ground plate 400, the panel 2 and the ground plate 400 may come into contact with each other due to external vibrations, such as vibrations of an automobile in which the antenna device 10 is mounted. Therefore, if the elastic base 110 is not provided between the lower surface of the -Z side of the panel 2 and the upper surface of the +Z side of the ground plate 400 and the panel 2 and the ground plate 400 are made of hard materials, it may be difficult to suppress the generation of abnormal noise due to contact between the panel 2 and the ground plate 400. However, in the embodiment, the elastic base 110 is attached to the panel 2 of the antenna device 10. Therefore, the elastic base 110 can suppress contact between the lower surface of the -Z side of the panel 2 and the upper surface of the +Z side of the ground plate 400. Furthermore, even if the lower surface of the -Z side of the panel 2 and the upper surface of the +Z side of the elastic base 110 come into contact with each other, the generation of abnormal noise can be suppressed compared to when the lower surface of the -Z side of the panel 2 and the upper surface of the +Z side of the ground plate 400 come into contact with each other. Therefore, in the embodiment, compared to when the elastic base 110 is not provided between the lower surface of the -Z side of the panel 2 and the upper surface of the +Z side of the ground plate 400, the generation of abnormal noise due to contact between the panel 2 and the part of the antenna device 10 attached to the panel 2 can be suppressed.

[0044] When the panel 2 and the antenna device 10 are attached to each other, the two elastic ribs 130 are compressed toward the -Z side by the panel 2. Therefore, the gap between the lower surface on the -Z side of the panel 2 and the upper surface on the +Z side of the ground plate 400 can be easily closed by the elastic body 100 including the elastic ribs 130. Therefore, compared to when it is difficult to close the gap between the lower surface on the -Z side of the panel 2 and the upper surface on the +Z side of the ground plate 400, it is possible to suppress the generation of abnormal noise due to contact between the panel 2 and the portion of the antenna device 10 attached to the panel 2.

[0045] As shown in FIG. 3 , when the panel 2 and the antenna device 10 are attached to each other, the panel 2 is sandwiched between the upper surface of the elastic base 110 on the +Z side and the two step surfaces 328 on both sides in the Y direction relative to both central inner surfaces of the mounting hole 2a. When the panel 2 and the antenna device 10 are attached to each other, the elastic base 110 and the two elastic ribs 130 are compressed in the Z direction by the panel 2 and the ground plate 400. Therefore, when the panel 2 and the antenna device 10 are attached to each other, the two arms 320 form a structure that holds the elastic base 110 to the panel 2 on both sides in the Y direction relative to both central inner surfaces of the mounting hole 2a. Therefore, the panel 2 and the antenna device 10 can be attached to each other more stably than when the elastic base 110 is not held by the panel 2.

[0046] In the embodiment, the case 300 has two arms 320. Therefore, the number of parts of the antenna device 10 can be reduced compared to when the case 300 and a structure for holding the elastic base 110 to the panel 2 are provided separately. The case 300 and the structure for holding the elastic base 110 to the panel 2 may be provided separately.

[0047] Although the embodiments of the present invention have been described above with reference to the drawings, these are merely examples of the present invention, and various other configurations can also be adopted.

[0048] According to the present specification, there is provided an antenna device having the following aspects. (Aspect 1) In aspect 1, the antenna device attached to the mounting body comprises an elastic body, an antenna element, and a holder that holds the elastic body, and with the mounting body, the elastic body, and the antenna element positioned on one side of the holder, the elastic body is positioned at least partially between the mounting body and the holder.

[0049] The "mounting body" corresponds to the "panel" in the above-mentioned embodiment. The "antenna element" corresponds to the "GNSS antenna" in the above-mentioned embodiment. The "holding body" corresponds to the "ground plate" in the above-mentioned embodiment.

[0050] According to the above-described aspect, the elastic body is the part attached to the mounting body of the antenna device. Therefore, contact between the mounting body and the holder can be suppressed by the elastic body. Furthermore, even if the mounting body and the elastic body come into contact with each other, the generation of abnormal noise can be suppressed compared to when the mounting body and the holder come into contact with each other. Therefore, the generation of abnormal noise due to contact between the mounting body and the part of the antenna device attached to the mounting body can be suppressed compared to when no elastic body is provided between the mounting body and the holder.

[0051] (Aspect 2) In a second aspect, the elastic body has elastic ribs that are compressed by the mounting body.

[0052] According to the above-described aspect, the gap between the mounting body and the portion of the antenna device attached to the mounting body can be easily closed by the elastic body including the elastic rib, which makes it possible to suppress the generation of abnormal noise caused by contact between the mounting body and the portion of the antenna device attached to the mounting body, compared to when the gap between the mounting body and the portion of the antenna device attached to the mounting body is difficult to close.

[0053] (Aspect 3) In a third aspect, the antenna device further includes a structure that holds the elastic body relative to the mounting body.

[0054] The "structure" corresponds to the "arm" in the above embodiment.

[0055] According to the above-described aspect, the mounting body and the antenna device can be attached to each other with the elastic body held by the mounting body, and therefore the mounting body and the antenna device can be attached to each other more stably than when the elastic body is not held by the mounting body.

[0056] (Aspect 4) In a fourth aspect, the structure is resiliently supported.

[0057] According to the above-described aspect, the structure can be flexed when attaching the mounting body and the antenna device. Therefore, by flexing the structure so as to suppress mutual interference between the mounting body and the structure, it is possible to easily attach the mounting body and the antenna device.

[0058] (Aspect 5) In a fifth aspect, the elastic body holds the antenna element.

[0059] According to the above-described aspect, the number of parts of the antenna device can be reduced compared to when the elastic body and the member that holds the antenna element are provided separately.

[0060] (Aspect 6) In a sixth aspect, the antenna device further includes a case that houses the antenna element, the case having the structure.

[0061] According to the above-described aspect, the number of parts of the antenna device can be reduced compared to when the case and the structure are provided separately. [Explanation of symbols]

[0062] 2 panel, 2a mounting hole, 10 antenna device, 100 elastic body, 110 elastic base, 112 large diameter hole, 114 upper slit, 120 elastic wall, 122 groove, 130 elastic rib, 200 antenna assembly, 210 board, 220 GNSS antenna, 230 shield cover, 240 cable, 300 case, 310 case body, 312 boss, 320 arm, 322 drawer portion, 324 widened portion, 326 tip portion, 328 stepped surface, 400 ground plate, 402 small diameter hole, 404 lower slit, 500 screw

Claims

1. An antenna device attached to a mounting body, An elastic body; an antenna element; a holder that holds the elastic body; Equipped with An antenna device, wherein the mounting body, the elastic body, and the antenna element are positioned on one side of the holder, and the elastic body is at least partially positioned between the mounting body and the holder.

2. 2. The antenna device according to claim 1, wherein the elastic body has elastic ribs that are compressed by the mounting body.

3. The antenna device according to claim 1 , further comprising a structure that holds the elastic body against the mounting body.

4. 4. The antenna device according to claim 3, wherein the structure is resiliently supported.

5. The antenna device according to claim 1 , wherein the elastic body holds the antenna element.

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