JP5162264B2 - Vehicle grounding antenna assembly - Google Patents

Description

  The present invention relates to a structure of a vehicle grounding antenna assembly.

  Many receiving devices such as a radio, a television, and a radio are mounted on the vehicle, and an antenna corresponding to the frequency of each of these receiving devices is mounted on the vehicle. In general passenger cars, receiving these radio waves by installing an antenna outside the vehicle is not desirable from the viewpoint of aesthetics and space, and the internal space of resin exterior products such as air spoilers and vehicle bumpers attached to the vehicle An antenna is installed on the door to share the space and improve the appearance of the vehicle (see, for example, Patent Document 1).

  As shown in FIGS. 10 and 11 of Patent Document 1, an air spoiler is provided with an antenna in which a plurality of film-like antenna elements corresponding to a reception target medium are arranged, and the feeder of the antenna penetrates the air spoiler and the vehicle body. And wired into the car. The feeder is connected to a ground wire for grounding the vehicle, and the tip of the ground wire is fixed to the inner panel of the vehicle body by a screw.

  However, in the vehicle-mounted antenna configured in this way, the wiring work with the vehicle-side cable is troublesome, and the grounding work becomes complicated, for example, requiring fixing work both inside and outside the vehicle. was there.

  Therefore, for example, as described in FIG. 8 of Patent Document 1, a metal bracket is integrally formed on a resin air spoiler, and the assembly of the air spoiler to the vehicle and the antenna element incorporated in the air spoiler by one mounting bolt are performed. A vehicle antenna that can be grounded simultaneously has been proposed.

JP 2003-309413 A

  Like the above air spoiler, the vehicle exterior product is often manufactured by resin molding. However, in the case of a large vehicle exterior product such as an air spoiler provided over the entire width of the vehicle, the vehicle exterior product is between the metal vehicle and the vehicle. A difference in thermal expansion in the width direction may occur. For this reason, as in the prior art described in Patent Document 1, when the air spoiler is fixed to the vehicle and the antenna element is grounded with one mounting bolt, the displacement between the air spoiler and the vehicle due to thermal expansion. It is necessary to provide the fixing bolt at the starting point of thermal expansion of the vehicle and the air spoiler, for example, at the center in the width direction of the vehicle.

  On the other hand, if a large number of vehicle grounded antennas are to be incorporated in the air spoiler, it is necessary to provide a bolt for fixing the air spoiler to the vehicle and a bolt for grounding the antenna element. In such a case, when the antenna element is grounded with a metal bracket and a bolt as described in Patent Document 1, an antenna element fixed to the ground bolt and the air spoiler is caused by a difference in thermal expansion between the vehicle and the air spoiler. There was a problem that the distance between the brackets changed, and this caused damage to the soldered portion of the bracket.

  In this case, there is a method in which the position of the grounding bolt is arranged at the center in the vehicle width direction, which is the starting point of thermal expansion of the air spoiler, and the antenna element end to the grounding bolt are connected by a feeder. There is a problem that the antenna performance is deteriorated due to the inability to ground in the vicinity and that it takes time to assemble the grounding feeder.

  The present invention provides a grounding bracket that absorbs a change in the distance between a grounding bolt fixed to a vehicle and an antenna element fixed to a vehicle exterior in a vehicle grounding antenna assembly with a simple structure. With the goal.

Vehicle ground Antenna assembly of the present invention, a first bolt for fixing the exterior parts for vehicles of the insulator in a vehicle, the antenna element is fixed to the exterior parts for vehicles, ground to ground the antenna elements in a vehicle A grounding bracket , one end of which is fixed to the grounding portion of the antenna element, and the other end of the grounding bracket is located at a position different in the longitudinal direction of the first bolt and the vehicle exterior product. is secured to the vehicle by a second bolt is provided between the one end and the other end, be provided with a conductive elastic member that expands and contracts in the longitudinal direction of the exterior parts for vehicles, characterized by.

In one form of the vehicle grounding antenna assembly according to the present invention, each of the vehicle and the vehicle exterior product has a hole into which the second bolt is inserted, and the vehicle exterior product has an inner diameter of the hole. The vehicle exterior product is larger than the diameter of the second bolt, and is movable with respect to the second bolt. In the vehicle earth type antenna assembly of the present invention, the elastic member of the grounding bracket, it expands and contracts in the direction connecting the first bolt and a second bolt, also to be suitable as a ground brackets A conductive antenna element connection plate fixed to the grounding portion of the antenna element, and a conductive bolt mounting plate to which a bolt is attached, and the elastic member connects the antenna element connection plate and the bolt mounting plate. It is also suitable as a conductive spring, and the spring is preferably a leaf spring obtained by bending a conductive thin plate connecting the antenna element connection plate and the bolt mounting plate. The grounding bracket is a metal plate integrally formed of an antenna element connection plate, a bolt mounting plate, and a leaf spring. It is suitable.

  The present invention provides a grounding bracket that absorbs a change in the distance between a grounding bolt fixed to a vehicle and an antenna element fixed to a vehicle exterior in a vehicle grounding antenna assembly with a simple structure. There is an effect that can be.

  Preferred embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an air spoiler 10 that is an exterior product with a built-in antenna for a vehicle is attached so as to follow a ceiling plate 101 at the rear of the vehicle 100. The air spoiler 10 is assembled by connecting the upper half casing 11 and the lower half casing 12 of an insulator, which are manufactured by resin molding, by bonding or the like, with the vehicle width direction being the longitudinal direction.

  As shown in FIG. 2, the air spoiler 10 is attached to the ceiling plate 101 of the vehicle 100 by bolts 102 and 103 at three points on the front side of the vehicle 100 of the lower half casing 12. A bolt 102 at the center of the vehicle 100 is a complete fixing point provided on the vehicle center line 110, and is a starting point of thermal expansion of the lower half casing 12 of the air spoiler 10 when the temperature rises. The bolts 103 on both sides of the vehicle 100 extend in the vehicle width direction provided in the lower half casing 12 so as to absorb the difference in thermal expansion between the ceiling plate 101 of the vehicle 100 and the lower half casing 12 in the vehicle width direction. It is attached to the vehicle 100 through the long hole 13.

  As shown in FIG. 2, a vehicle grounding type analog radio antenna assembly 20 extending in the longitudinal direction of the vehicle is attached to the inside of the air spoiler 10. The antenna assembly 20 includes a flat antenna element substrate 21, a thin antenna element 22 attached to the antenna element substrate 21, and an output substrate 26 that outputs a signal from the antenna element 22. Is connected to a coaxial cable 27. The antenna element substrate 21 includes a plurality of mounting flanges 23 extending in the vehicle front direction, and each mounting flange 23 is fixed to the lower half casing 12 by mounting bolts 24. Further, each mounting flange 23 includes a positioning reference 25 for fixing the antenna element substrate 21 to the lower half casing 12. The positioning reference 25 may be, for example, a hole that fits in a positioning rib provided in the lower half casing 12 or may be a protrusion that can determine the position of the antenna element substrate 21 in contact with the positioning rib. .

  A board mounting flange 28 extends in front of the vehicle on the vehicle right side of the antenna element board 21, and an output board 26 is mounted on the board mounting flange 28. Connected by.

  One end of the grounding bracket 41 is fixed to the output board 26 by a mounting pin 61 and is connected to the antenna element 22. The ground bracket 41 extends from the output board 26 toward the front of the vehicle and then extends toward the vehicle center in the vehicle width direction. An antenna element connection plate 47 including an L-shaped portion extending in the direction of the vehicle, a leaf spring 42 connected to the L-shaped portion of the antenna element connection plate 47 and extending in the vehicle width direction toward the center of the vehicle, and connected to the plate spring 42. And a bolt mounting plate 43 extending in the vehicle width direction toward the center and having a grounding bolt 48 fixed thereto by welding. The ground bolt 48 is provided on the ceiling plate 101 at a position where the distance in the vehicle width direction, which is the longitudinal direction of the air spoiler 10, which is the longitudinal direction of the air spoiler 10 is separated by D. It is fixed to the ceiling plate 101 by a nut that is fitted into the hole and screwed from the vehicle side.

  As shown in FIG. 3, the grounding bracket 41 is formed by bending a thin metal plate and integrally formed. The leaf spring 42 is provided between the L-shaped portion of the antenna element connection plate 47 and the bolt mounting plate 43. It is a folded leaf spring. The leaf spring 42 expands and contracts in the vehicle width direction, which is the longitudinal direction of the air spoiler 10. The inner conductor of the coaxial cable 27 attached to the output board 26 is connected to the signal pattern of the output board 26, and the outer conductor is connected to the ground pattern of the output board 26.

  As shown in FIG. 4, the ground bolt 48 is a stepped bolt, and includes a head portion 48 a attached to the bolt attachment plate 43 of the ground bracket 41 by welding 52, a screw portion 48 b into which a nut 49 is screwed, and a screw portion. A straight portion 48c having a diameter substantially the same as the diameter of 48b, and a step portion 48d that is between the straight portion 48c and the head portion 48a and has a larger diameter than the straight portion 48c are provided. A washer 54 having an inner diameter substantially the same as the diameter of the straight portion 48c is attached to the screw portion 48b side of the step portion 48d. The ceiling plate 101 is provided with a hole 105 having an inner diameter slightly larger than the diameter of the straight portion 48c. The ground bolt 48 is inserted into the hole 105 from the threaded portion 48 b, the washer 54 is sandwiched between the ceiling plate 101 and the stepped portion 48 d, and the nut 49 is screwed into the threaded portion 48 b, whereby the washer 54 and the nut 49 are interposed. The ceiling plate 101 is sandwiched between and fixed. The position of the ground bolt 48 is a position away from the vehicle center line 110 by D in the vehicle width direction.

  A gap corresponding to the total thickness of the thickness of the stepped portion 48d and the thickness of the washer 54 is formed between the grounding bracket 41 welded to the head portion 48a of the grounding bolt and the ceiling plate 101. The size of the gap is larger than the thickness of the lower half casing 12. The lower half casing 12 includes a hole 14 having an inner diameter larger than the diameter of the stepped portion 48d. For this reason, the lower half casing 12 is configured to be movable in a direction along the surface of the ceiling plate 101 between the ceiling plate 101 or the ground bolt 48 fixed to the ceiling plate 101. In the present embodiment, the size of the hole 14 is configured to have an inner diameter larger than the outer diameter of the washer 54 in consideration of assembly of the ground bolt 48 and the washer 54.

  With reference to FIG. 5, an operation for absorbing a change in distance between the ground bolt 48 fixed to the ceiling board 101 and the antenna element 22 fixed to the air spoiler 10 will be described. FIG. 5 is a schematic view showing a state where the air spoiler 10 to which the antenna element 22 is fixed is attached to the ceiling board 101. FIG. 5 (a) shows an assembled state of the air spoiler 10, and FIG. 5 (b) is an air spoiler. 10 shows a state having a thermal expansion difference α with respect to the ceiling plate 101.

  As shown in FIG. 5A, the antenna element 22 is fixed to the antenna element substrate 21, and the antenna element substrate 21 is fixed to the lower half casing 12. Therefore, the antenna element 22 is fixed to the lower half casing 12. ing. Further, the antenna element connection plate 47 of the ground bracket 41 is fixed to the output board 26, the output board 26 is fixed to the antenna element board 21, and the antenna element board 21 is fixed to the lower half casing 12. The antenna element connection plate 47 of the bracket 41 is fixed to the lower half casing 12 via the output board 26 and the antenna element board 21. The bolt mounting plate 43 of the ground bracket 41 is fixed to the ground bolt 48 by welding, and the ground bolt 48 is fastened and fixed to the ceiling plate 101 by a nut 49. The lower half casing 12 is fixed on the vehicle center line 110 of the ceiling plate 101 by bolts 102 and attached to the ceiling plate 101 so as to be able to slide in the width direction of the vehicle 100. The distance in the vehicle width direction between the grounding bolt 48 and the fixing bolt 102 is D.

  As shown in FIG. 5B, when the temperature of the ceiling board 101 and the air spoiler 10 rises and a difference in thermal expansion α occurs between the ceiling board 101 and the air spoiler 10, the air spoiler 10 becomes a fixed point. The bolt 102 moves by a thermal expansion difference α in the vehicle width direction. Since the antenna element 22, the antenna element substrate 21, and the antenna element connection plate 47 are all fixed to the lower half casing 12 of the air spoiler 10, when a thermal expansion difference α occurs between the air spoiler 10 and the ceiling plate 101, The ceiling plate 101 moves by the thermal expansion difference α in the vehicle width direction. On the other hand, the bolt mounting plate 43 is welded to the grounding bolt 48 that is fastened and fixed to the ceiling plate 101 by the nut 49, so that the bolt mounting plate 43 does not move with respect to the ceiling plate 101. For this reason, when a thermal expansion difference α is generated between the air spoiler 10 and the ceiling plate 101, a distance difference corresponding to the thermal expansion difference α is generated between the ground bolt 48 and the antenna element 22. In addition, a distance difference corresponding to the thermal expansion difference α also occurs between the antenna element connection plate 47 and the bolt mounting plate 43 fixed to the lower half casing 12.

  Due to this difference in distance, a force is applied between the antenna element connection plate 47 and the bolt mounting plate 43, and the leaf spring 42 provided between the antenna element connection plate 47 and the bolt mounting plate 43 is caused by this force. Shrink and absorb the difference in distance by the thermal expansion difference α. When the leaf spring 42 is contracted, the force generated by the difference in distance by the thermal expansion difference α is reduced, the force applied to the mounting portion or the soldering portion of the ground bracket 41 is reduced, and damage is suppressed.

  As described above, in the present embodiment, a difference in thermal expansion occurs between the vehicle 100 and the air spoiler 10, and between the ground bolt 48 fixed to the vehicle 100 and the antenna element 22 fixed to the air spoiler 10. When the distance is changed, the difference in distance can be effectively absorbed, and the damage of each part of the antenna assembly 20 can be suppressed.

  In the present embodiment, a leaf spring 42 formed by bending a thin metal plate is provided between the antenna element connection plate 47 and the bolt mounting plate 43 of the ground bracket 41 to absorb the difference in distance by the thermal expansion difference α. As long as it can expand and contract to absorb the difference in distance, it is not limited to the leaf spring 42, and a coil spring as a separate part may be provided, or may be configured by a conductive elastic member such as conductive rubber. Also good. One or one member such as a leaf spring or a coil spring may be provided, or a plurality of members may be provided. Further, when a plurality of antenna assemblies 20 are incorporated in the air spoiler 10, a leaf spring 42 or an elastic member may be attached to the ground bracket 41 of each antenna assembly 20.

  Another embodiment of the present invention will be described with reference to FIGS. Parts similar to those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 6, the present embodiment is configured such that the longitudinal direction, which is the expansion and contraction direction of the leaf spring 42 of the ground bracket 41, is the direction of the line a connecting the bolt 102 and the ground bolt 48. In this configuration, a change in the distance in the oblique direction between the ground bolt 48 fixed to the vehicle 100 and the antenna element 22 fixed to the air spoiler 10 can be absorbed.

  As shown in FIG. 6, the bolt 102 is a completely fixed point provided on the vehicle center line 110, and is a starting point of thermal expansion of the lower half casing 12 of the air spoiler 10 when the temperature rises, The ground bolt 48 is located at a distance D from the vehicle center line 110 provided with the bolt 102 of the lower half casing 12 of the air spoiler 10 in the vehicle width direction, which is the longitudinal direction of the air spoiler 10, and more than the bolt 102. It is fixed at a position close to the rear side of the vehicle. The L-shaped portion of the antenna element connection plate 47 of the ground bracket 41 extends in the direction of the line a connecting the ground bolt 48 and the bolt 102, and the leaf spring 42 connected to the L-shaped portion of the antenna element connection plate 47 and A bolt mounting plate 43 connected to the leaf spring 42 also extends in the direction of line a. Thus, in this embodiment, it is comprised so that the expansion-contraction direction of the leaf | plate spring 42 of the bracket 41 for earthing | grounding may become the direction of the line a slanting with respect to the width direction of a vehicle. The distance between the bolt 102 and the ground bolt 48 along the line a is E.

  With reference to FIG. 7, an operation for absorbing the change in the distance in the direction of line a shown in FIG. 6 between the ground bolt 48 fixed to the ceiling board 101 and the antenna element 22 fixed to the air spoiler 10 will be described. . FIG. 7 is a schematic diagram showing a state in which the air spoiler 10 to which the antenna element 22 is fixed is attached to the ceiling plate 101, as in FIG. 5B, and the air spoiler 10 is shown in FIG. 6 with respect to the ceiling plate 101. A state having a thermal expansion difference β in the direction of the line a is shown.

  As shown in FIG. 7, when the temperature of the ceiling plate 101 and the air spoiler 10 rises and a difference in thermal expansion occurs between the ceiling plate 101 and the air spoiler 10, the air spoiler 10 attaches the bolt 102 that is a fixing point. It moves by the difference in thermal expansion toward the center in the vehicle width direction and the vehicle longitudinal direction. At this time, a difference in thermal expansion β occurs between the ground bolt 48 and the bolt 102 in the direction of the line a that connects the ground bolt 48 and the bolt 102 shown in FIG. Since the antenna element 22, the antenna element substrate 21, and the antenna element connection plate 47 are all fixed to the lower half casing 12 of the air spoiler 10, if a difference in thermal expansion occurs between the ground bolt 48 and the bolt 102, respectively The plate 101 moves by a thermal expansion difference β in the direction of line a shown in FIG. On the other hand, the bolt mounting plate 43 is welded to the grounding bolt 48 that is fastened and fixed to the ceiling plate 101 by the nut 49, so that the bolt mounting plate 43 does not move with respect to the ceiling plate 101. Therefore, if a difference in thermal expansion β occurs between the air spoiler 10 and the ceiling plate 101 in the direction of line a shown in FIG. 6, the difference in thermal expansion between the ground bolt 48 and the antenna element 22 in the direction of line a. A difference in distance by β occurs, and the antenna element connection plate 47 and the bolt mounting plate 43 fixed to the lower half casing 12 as well as the antenna element 22 have a thermal expansion difference β in the direction of line a. A difference in distance will occur.

  Due to this difference in distance, a force in the direction of the line a shown in FIG. The leaf spring 42 provided on the side is contracted in the direction of the line a and absorbs the difference in distance by the thermal expansion difference β. When the leaf spring 42 is contracted, the force generated by the difference in distance by the thermal expansion difference β is reduced, the force applied to the attachment portion or the soldering portion of the ground bracket 41 is reduced, and damage is suppressed.

  In the antenna assembly 20 of the present embodiment, since the expansion and contraction direction of the leaf spring 42 of the ground bracket 41 is the direction of the line a connecting the bolt 102 and the ground bolt 48, the vehicle width between the air spoiler 10 and the vehicle 100. The distance in the diagonal direction between the ground bolt 48 fixed to the vehicle 100 and the antenna element 22 fixed to the air spoiler 10 caused by the difference in thermal expansion in the direction and the difference in thermal expansion in the longitudinal direction of the vehicle. Even in the case of a change, the difference in distance can be effectively absorbed, and the damage of each part of the antenna assembly 20 can be more effectively suppressed.

  Another embodiment of the present invention will be described with reference to FIGS. Parts similar to those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 8, the antenna assembly 20 of the present embodiment is configured such that a bracket mounting base 31 is attached to an antenna element substrate 21 and the grounding bracket 41 is held by the bracket mounting base 31. As shown in FIG. 8, the bolt 102 is a completely fixed point provided on the vehicle center line 110, and is a starting point of thermal expansion of the lower half casing 12 of the air spoiler 10 when the temperature rises, The grounding bolt 48 is provided on the ceiling plate 101 at a position separated from the vehicle center line 110 provided with the bolt 102 of the lower half casing 12 of the air spoiler 10 by a distance D in the vehicle width direction which is the longitudinal direction of the air spoiler 10. It fits in the hole and is fixed to the ceiling board 101 by a nut screwed from the vehicle side. The bracket attachment base 31 attached to the vehicle right end of the antenna element substrate 21 is configured such that the longitudinal direction of the ground bracket 41, which is the expansion / contraction direction of the ground bracket 41 to be held, is the direction of the line a. . The distance between the bolt 102 and the ground bolt 48 along the line a is E. The bracket mounting base 31 is electrically connected to an output bracket 32 for connecting an output from the coaxial cable 27 to a signal line (not shown) extending from the inside of the vehicle and the antenna element 22, and one end of the antenna element 22 is grounded to the vehicle. A grounding bracket 41 is attached.

  As shown in FIG. 9, the bracket mounting base 31 is formed by resin molding, and includes an output bracket mounting portion 31a to which the output bracket 32 is mounted and a grounding bracket mounting portion 31b to which the grounding bracket 41 is mounted. Each attachment part 31a, 31b is manufactured integrally in parallel.

  The grounding bracket 41 is formed by bending a thin metal strip, is attached to the bracket mounting base 31 with a mounting pin 61, and is electrically connected to the antenna element 22, and the ceiling of the vehicle 100. A grounding bolt 48 fixed to the plate 101 includes a bolt mounting plate 43 attached by welding. Between the bolt attachment plate 43 and the antenna element connection plate 47, a plate spring 42 is provided by bending a metal plate into a crank shape. The bolt mounting plate 43 is provided with a rib 44 that is bent from the surface on which the ground bolt 48 is mounted toward the bracket mounting base 31 and extends in the longitudinal direction of the ground bracket 41. A bracket lifting prevention claw 45 bent in a key shape from the mounting surface of the ground bolt 48 toward the bracket mounting base 31 is provided. The bolt mounting plate 43 between the ground bolt 48 and the leaf spring 42 is provided with a long hole 46 into which the resin pin 34 provided on the bracket mounting base 31 is fitted. The long hole 46 is a hole extending in the longitudinal direction of the grounding bracket 41.

  As shown in FIG. 10, in the grounding bracket 41, a leaf spring 42 enters the cover 33 provided on the bracket mounting base 31, and a rib 44 is provided on the bracket mounting base 31 and extends in the longitudinal direction of the grounding bracket 41. 35, the tip of the bracket lifting prevention claw 45 is inserted into the slit 36 having the opening width in the thickness direction of the grounding bracket 41, and provided at the bracket mounting base 31, and the center of the pin 34 of the bracket mounting base 31 Is assembled so as to fit in the center of the long hole 46 provided in the grounding bracket 41. The antenna element connection plate 47 is attached to the bracket attachment base 31 by attachment pins 61, and is electrically connected to the antenna element 22 by a connection hardware (not shown). The groove 35 guides the movement of the grounding bracket 41 in the longitudinal direction and restricts the movement in the direction perpendicular to the longitudinal direction. The length of the slit 36 is longer than the width of the bracket lifting prevention claw 45, and the width thereof is slightly larger than the plate thickness of the bracket lifting prevention claw 45. Guides movement in the longitudinal direction and limits movement in the thickness direction. Further, the inner dimension of the cover 33 is larger than the outer dimension of the leaf spring 42 and has a gap that allows the leaf spring 42 to elastically deform when absorbing thermal expansion. About the operation | movement of absorption of the thermal expansion difference by deformation | transformation of the leaf | plate spring 42, it is the same as that of embodiment described with reference to FIG.

  As in the embodiment described with reference to FIGS. 6 and 7, the antenna assembly 20 of the present embodiment has a vehicle width between the ground bolt 48 fixed to the vehicle 100 and the antenna element 22 fixed to the air spoiler 10. Even when the distance in the oblique direction with respect to the direction changes, the difference in distance can be effectively absorbed, and the damage of each part of the antenna assembly 20 can be more effectively suppressed.

  When the grounding bracket 41 is assembled to the bracket mounting base 31, the bolt mounting plate 43 is restricted from moving in the longitudinal direction, the direction perpendicular to the longitudinal direction, and the thickness direction of the grounding bracket 41. That is, the bolt mounting plate 43 of the grounding bracket 41 has XYZ of the bracket mounting base 31 with respect to the bracket mounting base 31 even though there is a leaf spring 42 whose shape is easily deformed between the bolt mounting plate 43 and the antenna element connection plate 47. Each movement in the three axial directions is restricted, and the relative position with respect to the bracket mounting base 31 can be held at the substantially assembled position. For this reason, in addition to the effects similar to those of the above-described embodiment, the present embodiment does not greatly separate the bolt mounting plate 43 from the bracket mounting base 31 when the air spoiler 10 is assembled to the ceiling plate 101. Since the position is stabilized, there is an effect that the ground bolt 48 can be easily assembled to the ceiling plate 101 of the vehicle 100.

It is a perspective view showing the state where the air spoiler with which the vehicle grounding type antenna assembly of the embodiment of the present invention was assembled was attached to the vehicle. It is a top view which shows the state in which the vehicle grounding-type antenna assembly of embodiment of this invention was attached to the lower half casing of an air spoiler. It is a perspective view which shows the bracket for grounding in the vehicle grounding-type antenna assembly of embodiment of this invention. It is sectional drawing which shows the fixing part to the ceiling board of the grounding volt | bolt in the vehicle grounding-type antenna assembly of embodiment of this invention. It is a conceptual diagram which shows the state which attached the air spoiler assembled | attached to the vehicle grounding-type antenna assembly of embodiment of this invention to the ceiling board, and the state which the thermal expansion difference generate | occur | produced. It is a top view which shows the state by which the vehicle grounding-type antenna assembly of other embodiment of this invention was attached to the lower half casing of the air spoiler. It is a conceptual diagram which shows the state which the thermal expansion difference generate | occur | produced between the air spoiler with which the vehicle grounding-type antenna assembly of other embodiment of this invention was assembled | attached, and a ceiling board. It is a top view which shows the state by which the vehicle grounding-type antenna assembly of other embodiment of this invention was attached to the lower half casing of the air spoiler. It is a perspective view which shows the bracket for grounding and the bracket attachment base in the vehicle grounding-type antenna assembly of other embodiment of this invention. It is the perspective view which looked at the bracket for grounding and the bracket attachment base in the vehicle grounding type antenna assembly of other embodiments of the present invention from the bolt side.

Explanation of symbols

  10 Air spoiler, 11 Upper half casing, 12 Lower half casing, 13 Long hole, 14, 105 hole, 20 Antenna assembly, 21 Antenna element board, 22 Antenna element, 23 Mounting flange, 24, 102, 103 bolt, 26 Output board 27 Coaxial cable, 28 PCB mounting flange, 31 Bracket mounting base, 31a Output bracket mounting section, 31b Ground bracket mounting section, 32 Output bracket, 33 Cover, 34 pins, 35 grooves, 36 slits, 41 Ground bracket, 43 Bolt mounting plate, 47 Antenna element connection plate, 48 Ground bolt, 48a Head, 48b Threaded portion, 48c Straight portion, 48d Stepped portion, 49 Nut, 52 Welded, 54 Washer, 61 With pins, 100 vehicle, 101 ceiling plate, 110 vehicle center line, D, E distance, alpha, beta thermal expansion difference.

Claims (6)

A first bolt for fixing an exterior vehicle exterior product to the vehicle;
An antenna element fixed to a vehicle exterior product;
A grounding bracket to ground the antenna elements in a vehicle, a vehicle ground type antenna assembly comprising,
Grounding bracket,
One end is fixed to the grounding portion of the antenna element, and the other end is fixed to the vehicle by a second bolt at a different position in the longitudinal direction of the first bolt and the vehicle exterior product,
Provided between one end and the other end, be provided with a conductive elastic member that expands and contracts in the longitudinal direction of the exterior parts for vehicles,
A vehicle grounding antenna assembly characterized by the above. The vehicle grounded antenna assembly according to claim 1,
Each of the vehicle and the vehicle exterior product has a hole into which the second bolt is inserted,
The inner diameter of the hole of the vehicle exterior product is larger than the diameter of the second bolt,
A vehicle grounding antenna assembly, wherein the vehicle exterior product is movable with respect to the second bolt. A vehicle grounded antenna assembly according to claim 1 or 2 ,
The elastic member of the grounding bracket expands and contracts in the direction connecting the first bolt and the second bolt;
Vehicle grounded antenna assembly characterized by A vehicle grounding antenna assembly according to any one of claims 1 to 3 ,
The grounding bracket includes a conductive antenna element connecting plate fixed to the grounding portion of the antenna element, and a conductive bolt mounting plate to which a bolt is attached,
The elastic member is a conductive spring that connects the antenna element connecting plate and the bolt mounting plate;
A vehicle grounding antenna assembly characterized by the above. A vehicle grounded antenna assembly according to claim 4 ,
The spring is a leaf spring obtained by bending a conductive thin plate that connects the antenna element connection plate and the bolt mounting plate.
A vehicle grounding antenna assembly characterized by the above. A vehicle grounded antenna assembly according to claim 4 or 5 ,
The grounding bracket is a metal plate integrally formed of an antenna element connection plate, a bolt mounting plate, and a leaf spring.
A vehicle grounding antenna assembly characterized by the above.

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