Mounting structure for vehicle-mounted antenna device

Abstract

To provide a mounting structure of an on-vehicle antenna device which enables miniaturization of the outer peripheral part of an antenna cover.SOLUTION: A mounting structure 10 of an on-vehicle antenna device for mounting an on-vehicle antenna device 1 having an antenna body 2 and an antenna cover 3 on a roof 51 of a vehicle 50 includes: a metal foundation part 53 on which the antenna body 2 is mounted; and a resin roof 52 on which the antenna cover 3 is mounted so as to cover the antenna body 2. The resin roof 52 has an opening 52a to which the foundation part 53 or the antenna body 2 are inserted inside the outer peripheral part 3a of the antenna cover 3. The outer peripheral part 3a of the antenna cover 3 is bonded to the resin roof 52 by an adhesive 4 in the periphery of the opening 52a.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a mounting structure for an in-vehicle antenna device. [Background technology]

[0002] Conventionally, an in-vehicle antenna device that is mounted on the roof of a vehicle is known, for example, as described in Patent Document 1. Patent Document 1 discloses an in-vehicle antenna device that is mounted on the vehicle roof and includes an antenna base including a metal base, and an antenna case that covers the antenna base. An annular seal member is provided between the antenna base and the vehicle roof. In this in-vehicle antenna device, water is mainly stopped by the seal member between the antenna base and the vehicle roof, not between the outer periphery of the antenna case and the vehicle body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-32166 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, when the roof of a vehicle is made of a plastic roof, a ground potential for the antenna body is necessary, so a structure is conceivable in which a metal base is provided on the inside of the plastic roof and the antenna body is disposed on the base so as to protrude from an opening provided in the plastic roof. In this structure, since the opening in the plastic roof is located inside the outer periphery of the antenna case, if the water-stopping structure of the above-mentioned conventional technology is applied as is, there is a risk that water will penetrate along the plastic roof to inside the outer periphery of the antenna case and reach the opening in the plastic roof.

[0005] Therefore, in order to secure the watertight function between the outer periphery of the antenna cover and the resin roof, a watertight structure is considered in which a seal member and a fastening member are used to fix the outer periphery of the antenna cover to the resin roof via the seal member. In this case, a certain amount of space is required inside the outer periphery of the antenna cover to accommodate the fastening member. Therefore, there is a problem that it is difficult to reduce the size of the outer periphery of the antenna cover, which places restrictions on the external design of the antenna cover.

[0006] An object of the present invention is to provide a mounting structure for an in-vehicle antenna device that makes it possible to reduce the size of the outer periphery of the antenna cover. [Means for solving the problem]

[0007] One aspect of the present invention is an installation structure for an on-board antenna device, which installs an on-board antenna device comprising an antenna body and an antenna cover on the roof of a vehicle, the installation structure comprising a metal base to which the antenna body is attached, and a resin roof to which the antenna cover is attached so as to cover the antenna body, the resin roof having an opening, inside the outer periphery of the antenna cover, through which the base or the antenna body is inserted, the edge of the opening extending along the inner periphery of the antenna cover, and the outer periphery of the antenna cover being joined to the resin roof with an adhesive around the periphery of the opening.

[0008] In one aspect of the present invention, the outer periphery of the antenna cover is bonded to the plastic roof around the opening with an adhesive. Bonding with an adhesive achieves a function of fixing the outer periphery of the antenna cover to the plastic roof and a function of waterproofing between the outer periphery and the plastic roof in a space-saving manner. This eliminates the need for space to accommodate fastening members inside the outer periphery of the antenna cover, for example, and provides room to narrow the shape of the outer periphery of the antenna cover. Therefore, according to the mounting structure for an in-vehicle antenna device according to one aspect of the present invention, it is possible to reduce the size of the outer periphery of the antenna cover.

[0009] In one embodiment, the outer periphery of the antenna cover may be bonded to the resin roof with an adhesive around the entire circumference of the opening. In this case, the adhesive bonding provides a fixing function between the outer periphery of the antenna cover and the resin roof and a waterproofing function between the outer periphery of the antenna cover and the resin roof around the entire circumference of the opening.

[0010] In one embodiment, a first protrusion is formed on the outer periphery of the antenna cover, inside the edge of the antenna cover, and the first protrusion may include a joint surface facing the surface of the plastic roof, and an adhesive may be disposed between the joint surface and the plastic roof. In this case, the adhesive is less likely to overflow from the edge of the antenna cover, so that the in-vehicle antenna device can be easily attached with a good appearance, compared to a configuration in which an adhesive is disposed between the edge of the antenna cover and the plastic roof, for example.

[0011] In one embodiment, the resin roof has a through hole provided between the adhesive portion with the antenna cover and the edge of the opening, and a second protrusion is formed on the outer periphery of the antenna cover, inside the edge of the antenna cover, and the second protrusion may be fixed by a fixing member extending in a direction intersecting the extending direction of the through hole while being inserted into the through hole. In this case, the second protrusion and the fixing member allow the vehicle-mounted antenna device to be attached to the roof more reliably.

[0012] In one embodiment, the plastic roof may have an engagement edge formed on a part of the edge of the opening, and the antenna cover may have a third protrusion having a cross-sectional shape that engages with the engagement edge. In this case, the antenna cover can be positioned with respect to the plastic roof by engaging the third protrusion with the engagement edge. Effect of the Invention

[0013] According to the present invention, it is possible to reduce the size of the outer periphery of the antenna cover. [Brief description of the drawings]

[0014] [Figure 1]1 is a schematic perspective view illustrating a portion of a roof of a vehicle to which an in-vehicle antenna device is attached; [Diagram 2] 1 is a schematic cross-sectional view of a mounting structure for an in-vehicle antenna device according to an embodiment of the present invention; [Diagram 3] 3 is a cross-sectional view illustrating a main part of the mounting structure for the vehicle-mounted antenna device of FIG. 2. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] FIG. 4 is an enlarged cross-sectional view of a main part at the front of FIG. [Figure 6] FIG. 4 is an enlarged cross-sectional view of a main part at the rear of FIG. [Figure 7] 1(a) is a plan view for explaining a method for testing adhesive performance (shear), and (b) is a side view for explaining a method for testing adhesive performance (shear). [Figure 8] FIG. 1 is a diagram for explaining a test method for adhesive performance (peeling). [Figure 9] FIG. 2 is a perspective view of a vehicle for explaining the range of a resin roof. [Figure 10] 1A is a schematic cross-sectional view of a mounting structure for an in-vehicle antenna device according to a first comparative example, and FIG.1B is a schematic cross-sectional view of a mounting structure for an in-vehicle antenna device according to a second comparative example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent elements are designated by the same reference numerals, and duplicated explanations will be omitted.

[0016] Fig. 1 is a schematic perspective view illustrating a part of a roof of a vehicle to which an in-vehicle antenna device is attached. Fig. 2 is a schematic cross-sectional view of a mounting structure for an in-vehicle antenna device according to one embodiment. In the following description, the front-rear direction of the vehicle may be expressed as the "front-rear direction", the width direction of the vehicle as the "left-right direction", and the height direction of the vehicle as the "up-down direction". In each figure, the +X direction in the figure corresponds to the front of the vehicle, the +Y direction in the figure corresponds to the right, and the +Z direction in the figure corresponds to the upward direction.

[0017] Fig. 1 shows an in-vehicle antenna device 1 and a part of a vehicle 50 to which the in-vehicle antenna device 1 is attached. Fig. 2 is a partial cross-sectional view illustrating an internal structure of the in-vehicle antenna device 1 as viewed from the left side. As shown in Figs. 1 and 2, the in-vehicle antenna device 1 is an antenna device that is attached to an upper surface of a roof 51 of a vehicle 50 such as a passenger car when used. The mounting structure 10 for the in-vehicle antenna device is a mounting structure for mounting the in-vehicle antenna device 1 to the roof 51 of the vehicle.

[0018] The roof 51 of the vehicle 50 has a double structure at least in the area where the vehicle-mounted antenna device 1 is attached, and has a resin roof 52 and a base portion 53. The resin roof 52 is a resin roof panel of plastic glazing that constitutes the outermost part of the roof 51 of the vehicle 50. The resin roof 52 is mainly composed of polycarbonate, for example. The resin roof 52 extends in the front-rear and left-right directions corresponding to the shape of the cabin of the vehicle 50, and has a substantially rectangular plate shape. The area of ​​the resin roof 52 in the roof 51 of the vehicle 50 is not particularly limited (described later). The resin roof 52 may be two-color molded or single-color molded. The resin roof 52 may be hard-coated to improve weather resistance.

[0019] The base portion 53 is a metal panel that constitutes the roof 51 of the vehicle 50 on the inner side (lower side) of the vehicle than the plastic roof 52. The base portion 53 extends in the front-rear and left-right directions in accordance with the shape of the plastic roof 52, and is, for example, in the form of a substantially rectangular plate with a smaller area than the plastic roof 52. The base portion 53 may be partially provided with a recess 53a so as not to interfere with a member for mounting the vehicle-mounted antenna device 1 (see FIG. 3).

[0020] The vehicle-mounted antenna device 1 includes an antenna body 2 attached to a base portion 53, and an antenna cover 3 attached to a resin roof 52. The antenna body 2 is a main part for the antenna function, and is configured to include an antenna board such as a GNSS (Global Navigation Satellite System) antenna. The antenna body 2 has, for example, a fixing portion 2a that protrudes downward and is inserted into a through hole 53b of the base portion 53. The antenna body 2 is fixed to the base portion 53 by fastening or fitting the fixing portion 2a to the base portion 53.

[0021] The antenna cover 3 is attached to the resin roof 52 so as to cover the antenna body 2. The antenna cover 3 is formed of a resin having radio wave permeability. For example, a polymer alloy of polycarbonate / ABS resin (PC / ABS) can be used as the resin for the antenna cover 3. The appearance of the antenna cover 3 is such that the width in the left-right direction gradually decreases from the roof 51 upward and tapers toward the front. The shape of the vehicle-mounted antenna device 1 is also called a shark fin antenna or a dolphin antenna. The antenna cover 3 is attached to the resin roof 52 at the outer periphery 3a of the antenna cover 3. The lower edge 3b of the outer periphery 3a may be located at a predetermined distance from the surface of the resin roof 52.

[0022] The resin roof 52 has an opening 52a through which the antenna body 2 is inserted. When the vehicle-mounted antenna device 1 is placed at a predetermined position on the roof 51, the opening 52a is provided inside the outer periphery 3a of the antenna cover 3. The shape of the opening 52a is not particularly limited as long as it allows the antenna body 2 to be inserted. The opening 52a here is, for example, substantially rectangular and slightly larger than the cross-sectional dimensions of the antenna body 2 (see FIG. 1).

[0023] Fig. 3 is a cross-sectional view illustrating a main part of the mounting structure for an in-vehicle antenna device in Fig. 2. Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 3. Fig. 5 is an enlarged cross-sectional view of a main part at the front of Fig. 3. Fig. 6 is an enlarged cross-sectional view of a main part at the rear of Fig. 3. In the mounting structure 10 for an in-vehicle antenna device of this embodiment, the outer peripheral part 3a of the antenna cover 3 is joined to the resin roof 52 around the opening 52a with an adhesive 4. From the viewpoint of adhesion performance and water-stopping performance, it is preferable that the outer peripheral part 3a of the antenna cover 3 is joined to the resin roof 52 with an adhesive over the entire circumference around the opening 52a.

[0024] More specifically, a first protrusion 3c is formed on the outer periphery 3a of the antenna cover 3, on the inside of the edge 3b of the antenna cover 3. The first protrusion is a protrusion for bonding by disposing (applying) an adhesive 4 on its tip. Here, as an example, the first protrusion 3c is provided all around the outer periphery 3a of the antenna cover 3. The first protrusion 3c is provided, for example, at a position a predetermined distance inward (toward the opening 52a) from the edge 3b of the antenna cover 3. The first protrusion 3c can be, for example, a plate-like protrusion extending downward from the inner surface of the antenna cover 3 at that position as a base end.

[0025] The cross-sectional shape of the first projection 3c intersecting the circumferential direction of the outer circumferential portion 3a is not particularly limited, and may be, for example, rectangular. The cross-sectional shape of the first projection 3c may be a trapezoid with a base end on the antenna cover 3 side inclined. For example, the tip (the end opposite to the base end) of the first projection 3c is a joint surface 3d facing the surface of the resin roof 52. The joint surface 3d has, for example, a flat surface extending in the front-rear and left-right directions, and is approximately parallel to the surface of the resin roof 52. The adhesive 4 is disposed between the joint surface 3d and the resin roof 52. The joint surface 3d may be separated from the resin roof 52 by a predetermined distance considering the adhesive strength of the adhesive when the adhesive 4 is not disposed.

[0026] Specifically, for example, a two-liquid reactive urethane adhesive, a two-liquid epoxy x modified silicone adhesive, or a one-liquid modified silicone adhesive can be used as the adhesive 4. The two-liquid epoxy x modified silicone refers to, for example, a two-liquid mixed reactive epoxy modified silicone elastic adhesive.

[0027] The evaluation results of the adhesive performance of Adhesive 4 are shown in Table 1 below. [Table 1]

[0028] Table 1 shows the evaluation results of the adhesive performance using the test pieces. FIG. 7(a) is a plan view for explaining the test method of the adhesive performance (shear). FIG. 7(b) is a side view for explaining the test method of the adhesive performance (shear). FIG. 8 is a diagram for explaining the test method of the adhesive performance (peel). In the evaluation of "shear", the ends of the test pieces T1 and T2 made of PC / ABS resin or PC resin with hard coat were bonded to each other at room temperature (e.g., 25°C) in a state in which the test pieces T1 and T2 were parallel to each other as shown in FIG. 7(a). After a certain time or more has elapsed, the adhesive performance was evaluated by pulling the test pieces T1 and T2 in opposite directions along the extension direction, as shown in FIG. 7(b). In the evaluation of "peeling," as shown in Figure 8, canvas T4 was adhered to the end of test piece T3 made of PC / ABS resin or hard-coated PC resin by folding back one end of canvas T4, and after a certain period of time had passed, canvas T4 was pulled in the direction indicated by the arrow relative to test piece T3 to peel it off, and the adhesive performance was evaluated.

[0029] The adhesive performance of adhesive 4 is shown in "Adhesive performance" in Table 1. With the exception of "shear" with two-part epoxy x modified silicone, all of the adhesives used exhibited particularly excellent adhesive strength (corresponding to a double circle). In the "shear" with two-part epoxy x modified silicone, although the result was weaker than the results under the other test conditions, it exhibited excellent adhesive strength (corresponding to a single circle). Meanwhile, the water-stopping performance of adhesive 4 is shown in "Water-stopping performance" in Table 1. Because the adhesive bonds the outer periphery of the antenna cover to the resin roof, a seal is formed between them, all of the adhesives used exhibited particularly excellent water-stopping performance (corresponding to a double circle).

[0030] Incidentally, the first protrusion may be formed integrally with a protrusion having another function. For example, the first protrusion 5a may be formed integrally with the third protrusion 5 formed on the antenna cover 3 on the rear side of the vehicle.

[0031] The third protrusion 5 is a protrusion for positioning the antenna cover 3. The third protrusion 5 here positions the antenna cover 3 in the left-right direction on the vehicle rear side. The third protrusion 5 is provided, for example, at a position inward (opening 52a side) by a predetermined distance from the edge 3b at the rear of the outer circumferential portion 3a of the antenna cover 3. The third protrusion 5 is formed, for example, at this position so as to extend downward from the inner surface of the antenna cover 3 as a base end and bend in a crank shape. In such a third protrusion 5, the portion from the base end of the inner surface of the antenna cover 3 to the bent in a crank shape functions as the first protrusion 5a. On the base end side of the third protrusion 5, the first protrusion 5a is integrally formed in connection with the first protrusion 3c of the portion other than the rear end.

[0032] The third projection 5 positions the antenna cover 3 in the left-right direction by engaging with an engaging edge 52b formed on a part of the edge of the opening 52a of the plastic roof 52. The engaging edge 52b may be a rectangular (e.g., oblong) cutout provided at the rearmost part of the opening 52a of the plastic roof 52, for example, when viewed in a plan view from above. The cross-sectional shape of the third projection 5 is not particularly limited as long as it can engage with the engaging edge 52b, but may be rectangular like the cutout shape of the engaging edge 52b.

[0033] A flat surface formed by the crank-shaped bent portion of the third projection 5 may be used as the joint surface 5b of the first projection 5a. The joint surface 5b extends in the front-rear and left-right directions and is a flat surface facing the resin roof 52, for example, by bending the third projection 5 at a substantially right angle. The adhesive 4 is placed between this joint surface 5b and the resin roof 52. When the adhesive 4 is not placed, the joint surface 5b may be spaced from the resin roof 52 by a predetermined distance taking into consideration the adhesive strength of the adhesive.

[0034] Incidentally, the second protrusion 6 may be formed on the outer periphery 3a of the antenna cover 3, on the inside of the edge 3b of the antenna cover 3. The second protrusion 6 is a protrusion for restricting the upward movement of the antenna cover 3. The second protrusion 6 is provided, for example, on the front side of the antenna cover 3. The second protrusion 6 is inserted, for example, into a through hole 52c provided in the resin roof 52 between the bonding portion with the antenna cover 3 and the edge of the opening 52a. The second protrusion 6 is fixed by the fixing member 7 in a state where it is inserted into the through hole 52c. For example, a groove (not shown) for inserting the fixing member 7 at a predetermined position is formed in the second protrusion 6 so as to intersect with the extending direction of the through hole 52c. This groove is formed on the lower side of the resin roof 52 in a state where the second protrusion 6 is inserted into the through hole 52c from the upper side of the resin roof 52. By inserting the fixing member 7 into this groove, the fixing member 7 extends in a direction intersecting the extending direction of the through hole 52c, and the second protrusion 6 is prevented from coming out of the through hole 52c, and the upward movement of the antenna cover 3 is restricted. The fixing member 7 may be, for example, a plate-like clamp metal fitting having a U-shape. The fixing member 7 may be a C-ring or an E-ring. The fixing member 7 may be a fixing pin (for example, a split pin, etc.), in which case, instead of the above-mentioned groove, a pin insertion hole may be formed in the second protrusion 6 so as to intersect with the extending direction of the through hole 52c.

[0035] Between the edge 3b of the antenna cover 3 and the resin roof 52, an elastic member (for example, a rubber material) may be interposed to hide the gap between the edge 3b of the antenna cover 3 and the resin roof 52.

[0036] The range of the plastic roof 52 in the roof 51 of the vehicle 50 can be any range including the portion shown in FIG. 1 in front of the rear window. FIG. 9 is a perspective view of the vehicle for explaining the range of the plastic roof. The range of the plastic roof 52 may be only the area PG1 of the rear end portion of the roof 51 corresponding to the upper part of the rear seat of the vehicle 50 as shown in FIG. 9, or may be the entire area of ​​the roof 51 including the areas PG1 and PG2 so as to cover the entire cabin of the vehicle 50. When the plastic rear window PG3 is integrally formed with the plastic roof 52, the range of the plastic roof 52 may be the area including the areas PG1 and PG3, or may be the area including the areas PG1, PG2, and PG3. When the plastic roof 52 is two-color molded, a transparent portion PG4 may be set in the area PG2.

[0037] The effect of the mounting structure 10 for the vehicle-mounted antenna device configured as described above will be described. FIG. 10(a) is a schematic cross-sectional view of the mounting structure for the vehicle-mounted antenna device according to the first comparative example. FIG. 10(b) is a schematic cross-sectional view of the mounting structure for the vehicle-mounted antenna device according to the second comparative example. In the structure of the first comparative example, the roof 151 is made of a conventional metal, not made of resin, and no gap such as the opening 52a described above is provided. In this case, the sealing member 104 interposed between the antenna body 102 and the roof 151 mainly performs a water-stopping function, so the water-stopping function at the outer periphery of the antenna cover 103 is not essential. In the structure of the second comparative example, the roof includes the resin roof 152 and the base part 153, and the gap 152a like the opening 52a described above is provided. Therefore, if the outer periphery of the antenna cover 103 is arranged inside the gap 152a (toward the antenna body 102), water may enter the gap 152a. Therefore, it is necessary that the outer periphery of the antenna cover 103 is arranged outside the gap 152a. However, even if the outer periphery of antenna cover 103 is positioned outside gap 152a, if the component that exerts the main waterproofing function is only sealing member 104 as shown in Fig. 10(b), there is still a risk of water entering between antenna cover 103 and plastic roof 152. Therefore, when gap 152a such as opening 52a described above is provided, a waterproofing function is essential between antenna cover 103 and plastic roof 152 around gap 152a such as opening 52a described above (outside gap 152a).

[0038] Therefore, in order to secure a water-stopping function between the outer periphery of the antenna cover and the resin roof, a water-stopping structure is considered in which the outer periphery of the antenna cover is fixed to the resin roof via a sealing member using a sealing member and a fastening member. In FIG. 4, as a comparative example, a water-stopping structure in which the outer periphery of the antenna cover is fixed to the resin roof 52 using a fastening member 105 is shown by a two-dot chain line. In this structure, a certain space is required inside the outer periphery of the antenna cover to accommodate the fastening member 105. That is, in order to provide the space, the outer periphery of the antenna cover of the comparative example has a thickness larger than the upward protruding height of the fastening member 105 and has a shape that spreads outward larger than the area occupied by the fastening member 105 in the front-rear and left-right directions (for example, the dimensions of an insert nut, etc.). Furthermore, in order to suppress water penetration into the fastened portion, a sealing member is disposed outside the fastening member 105, so that the outer periphery of the antenna cover of the comparative example is likely to spread outward. In this way, if it is difficult to reduce the size of the outer periphery of the antenna cover, it places restrictions on the external design of the antenna cover.

[0039] In this regard, according to the mounting structure 10 for the vehicle-mounted antenna device, the outer peripheral portion 3a of the antenna cover 3 and the resin roof 52 are bonded to each other, so that the intrusion of water into the inside (the antenna body 2 side) of the outer peripheral portion 3a of the antenna cover 3 is suppressed. As a result, it is possible to prevent water from infiltrating into the gap between the resin roof 52 and the base portion 53 at the opening 52a. In this way, by bonding with the adhesive 4, the fixing function of the outer peripheral portion 3a of the antenna cover 3 to the resin roof 52 and the waterproofing function between the resin roof 52 are realized in a small space. As a result, as shown by the two-dot chain line in FIG. 4, a space for accommodating the fastening member 105 inside the outer peripheral portion of the antenna cover is not required, and there is a room to narrow the shape of the outer peripheral portion of the antenna cover. Therefore, according to the mounting structure 10 for the vehicle-mounted antenna device, it is possible to reduce the size of the outer peripheral portion 3a of the antenna cover 3.

[0040] According to the mounting structure 10 for an in-vehicle antenna device, the outer periphery 3a of the antenna cover 3 is joined to the resin roof 52 over the entire circumference of the opening 52a with the adhesive 4. This provides a fixing function between the outer periphery 3a of the antenna cover 3 and the resin roof 52, and a waterproofing function between the outer periphery 3a and the resin roof 52 over the entire circumference of the opening 52a.

[0041] According to the mounting structure 10 for an in-vehicle antenna device, a first protrusion 3c is formed on the outer periphery 3a of the antenna cover 3, on the inside of the edge 3b of the antenna cover 3. The first protrusion 3c includes a joint surface 3d that faces the surface of the resin roof 52. An adhesive 4 is disposed between the joint surface 3d and the resin roof 52. This makes it difficult for the adhesive 4 to protrude from the edge 3b of the antenna cover 3, so that the in-vehicle antenna device 1 can be easily mounted with a good appearance, compared to a configuration in which the adhesive 4 is disposed between the edge 3b of the antenna cover 3 and the resin roof 52, for example.

[0042] According to the mounting structure 10 for the vehicle-mounted antenna device, the resin roof 52 has a through hole 52c provided between the adhesive portion with the antenna cover 3 and the edge of the opening 52a. A second protrusion 6 is formed on the outer periphery 3a of the antenna cover 3, on the inside of the edge 3b of the antenna cover 3. The second protrusion 6 is inserted into the through hole 52c and fixed by a fixing member 7 extending in a direction intersecting the extending direction of the through hole 52c. This allows the vehicle-mounted antenna device 1 to be mounted on the roof 51 more reliably by the second protrusion 6 and the fixing member 7.

[0043] According to the mounting structure 10 for an in-vehicle antenna device, the plastic roof 52 has an engagement edge 52b formed on a part of the edge of the opening 52a. The antenna cover 3 has a third protrusion 5 having a cross-sectional shape that engages with the engagement edge 52b. The antenna cover 3 can be positioned with respect to the plastic roof 52 by engaging the third protrusion 5 with the engagement edge 52b.

[0044] Furthermore, according to the mounting structure 10 for an in-vehicle antenna device, the fastening member 105 is not necessary, as compared with a mounting structure that uses the fastening member 105, for example, so that an increase in the number of parts can be suppressed and the complication of managing the fastening member 105 during assembly, etc. and the increase in cost due to the fastening member 105 can be suppressed.

[0045] [Variations] Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment.

[0046] In the above embodiment, the outer periphery 3a of the antenna cover 3 is joined to the resin roof 52 over the entire circumference of the opening 52a with the adhesive 4, but this is not limited to this. As long as a predetermined adhesive performance is ensured, a member other than the adhesive 4 (e.g., an elastic member such as rubber or sponge) may be interposed between the outer periphery 3a of the antenna cover 3 and the resin roof 52 in a part of the entire circumference of the outer periphery 3a of the antenna cover 3 to stop water.

[0047] In the above embodiment, the first protrusion 5a is formed integrally with the third protrusion 5, but may be a separate body. In addition, the first protrusion 3c on the vehicle front side is formed separate from the second protrusion 6, but may be formed integrally with the second protrusion 6.

[0048] In the above embodiment, the outer periphery 3a of the antenna cover 3 is bonded to the resin roof 52 via the joining surfaces 3d, 5b of the first projections 3c, 5a, but this is not limited thereto. For example, the edge 3b of the outer periphery 3a of the antenna cover 3 and the resin roof 52 may be bonded directly to each other.

[0049] In the above embodiment, both the second protrusions 6 and the third protrusions 5 are provided, but at least one of the second protrusions 6 and the third protrusions 5 may be omitted.

[0050] In the above embodiment, the antenna body 2 is inserted into the opening 52a of the resin roof 52, but this is not limiting. For example, the base portion 53 may be inserted into the opening 52a. In other words, the base portion 53 may have a shape that protrudes upward beyond the resin roof 52 inside the opening 52a (for example, a panel shape that is bent into a trapezoidal shape in a cross-sectional view).

[0051] At least some of the embodiments and various modified examples described above may be combined in any desired manner.

[0052] The constituent elements of one embodiment of the present invention will be described below. <Invention 1> A mounting structure for an in-vehicle antenna device, which is provided with an antenna body and an antenna cover, and is mounted on a roof of a vehicle, comprising: a metal base portion to which the antenna body is attached; a resin roof to which the antenna cover is attached so as to cover the antenna body; Equipped with the resin roof has an opening for inserting the base or the antenna body on the inner side of an outer periphery of the antenna cover, an outer periphery of the antenna cover is joined to the resin roof around the opening with an adhesive; <Invention 2> The mounting structure for an in-vehicle antenna device according to claim 1, wherein the outer periphery of the antenna cover is joined to the resin roof with an adhesive around the entire periphery of the opening. <Invention 3> a first protrusion is formed on an outer periphery of the antenna cover, the first protrusion being located inside an edge of the antenna cover; the first projection includes a joining surface facing the surface of the resin roof, 3. The mounting structure for a vehicle-mounted antenna device according to claim 1, wherein an adhesive is disposed between the joint surface and the resin roof. <Invention 4> the resin roof has a through hole provided between an adhesive portion with the antenna cover and an edge of the opening, a second protrusion is formed on the outer periphery of the antenna cover, the second protrusion being located inside the edge of the antenna cover; A mounting structure for an in-vehicle antenna device as described in any one of Inventions 1 to 3, wherein the second protrusion is inserted into the through hole and fixed by a fixing member extending along a direction intersecting the extension direction of the through hole. <Invention 5> The resin roof has an engagement edge portion formed on a part of an edge of the opening, 5. The mounting structure for an in-vehicle antenna device according to any one of claims 1 to 4, wherein the antenna cover has a third projection having a cross-sectional shape that engages with the engaging edge portion. [Explanation of symbols]

[0053] 1...vehicle-mounted antenna device, 3...antenna cover, 3a...outer periphery, 3b...edge, 3c, 5a...first protrusion, 3d, 5b...joint surface, 4...adhesive, 5...third protrusion, 6...second protrusion, 7...fixing member, 10...mounting structure for vehicle-mounted antenna device, 50...vehicle, 51...roof, 52...plastic roof, 52a...opening, 52b...engagement edge, 52c, 53b...through hole, 53...base.

Claims

1. A mounting structure for an in-vehicle antenna device, which is provided with an antenna body and an antenna cover, and is mounted on a roof of a vehicle, comprising: a metal base portion to which the antenna body is attached; a resin roof to which the antenna cover is attached so as to cover the antenna body; Equipped with the resin roof has an opening for inserting the base or the antenna body on the inner side of an outer periphery of the antenna cover, an outer periphery of the antenna cover is joined to the resin roof around the opening with an adhesive;

2. 2. The mounting structure for an in-vehicle antenna device according to claim 1, wherein an outer periphery of the antenna cover is bonded to the resin roof by an adhesive over the entire periphery of the opening.

3. a first protrusion is formed on an outer periphery of the antenna cover, the first protrusion being located inside an edge of the antenna cover; the first projection includes a joining surface facing the surface of the resin roof, 3. The mounting structure for an in-vehicle antenna device according to claim 1, wherein an adhesive is disposed between the joint surface and the resin roof.

4. the resin roof has a through hole provided between an adhesive portion with the antenna cover and an edge of the opening, a second protrusion is formed on an outer periphery of the antenna cover, the second protrusion being located inside an edge of the antenna cover; 2. The mounting structure for an in-vehicle antenna device according to claim 1, wherein the second projection is fixed by a fixing member extending in a direction intersecting an extension direction of the through hole while being inserted into the through hole.

5. The resin roof has an engagement edge portion formed on a part of an edge of the opening, 2. The mounting structure for an in-vehicle antenna device according to claim 1, wherein the antenna cover has a third projection having a cross-sectional shape that engages with the engaging edge portion.

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