JP2005045581A - In-board antenna mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve mounting workability and reduce component managing processes. <P>SOLUTION: A ground base 20 whose cross section is near square is inserted in a second protruding part 13f whose cross section is cylindrical, so that a bolt 21 is screwed in a base 13 through the ground base 20. At that time, projections 13g formed as a pair on the outer peripheral surface of a third protruding part 13f engages with grooves formed as a pair in the insert hole of the ground base 20, so that the ground base 20 is positioned in such a state as being rotated at about 45° from the base 13. Under this condition, the ground base 20 is inserted in a square mounting hole, and rotated at about 45°, thus up to a first protruding part 13c whose cross section is square is inserted in the mounting hole. By tightening the bolt 21, a protruding part 20a of the ground base 20 is abutted with and mounted around the mounting hole. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle-mounted antenna mounting structure for fixing a vehicle-mounted antenna including an antenna element to a vehicle body.

  As shown in FIG. 20, an automobile antenna in which an antenna body is fixed to a vehicle body is generally attached to a roof panel of an automobile.

  The antenna body of this automobile antenna is composed of an antenna cover 101a and an element portion (not shown) attached to the antenna cover 101a, and a base portion (not shown) is fixed to the lower end of the antenna cover 101a. A cylindrical protruding portion 113 is formed so as to protrude from the lower surface of the base portion, and the cylindrical protruding portion 113 is inserted into a rectangular mounting hole formed in the roof panel 120. In this state, the antenna body is fixed to the roof panel 120 by screwing the mounting nut 102 into the cylindrical protrusion 113 from the inside of the roof panel 120. In this case, the base of the cylindrical protrusion 113 is a rectangular protrusion, and cannot be rotated with respect to the roof panel 120 when inserted into a rectangular attachment hole formed in the roof panel 120.

  When fixing such an antenna body to the roof panel 120, a rectangular protrusion formed on the base portion is inserted into a rectangular attachment hole formed on the roof panel 120, and the antenna body is inserted through the attachment hole. An operator who is located outside the vehicle body holds the antenna body so that it does not come out. In this state, another worker located inside the vehicle body screwes the mounting nut 102 into the cylindrical protruding portion 113 protruding into the vehicle body, and tightens the mounting nut 102, so that the antenna body is roofed. The panel 120 is fixed. In addition, the element part should be covered with the antenna cover so that the rotating part of the car wash machine does not collide when the car is washed or it touches the ceiling of the garage when entering the garage. It can be removed from 101a. The mounting nut 102 includes an integrated washer portion 102a and a nut portion 102b, and is formed at the tip of the washer portion 102a when the nut portion 102b is screwed to the cylindrical protruding portion 113. The tip of the triangular protrusion meshes with the back surface of the roof panel 120. As a result, the antenna body can be securely fixed to the roof panel 120 electrically and mechanically.

As described above, the conventional automobile antenna requires at least two workers positioned inside and outside the vehicle body during the mounting operation. In order to solve this problem, a spring portion that is located on the side surface of the cylindrical protrusion and is inclined outward is provided. When the cylindrical protrusion is inserted into the attachment hole, the spring portion is inserted into the rectangular antenna attachment hole. There has been proposed an automobile antenna in which the antenna body is prevented from coming out of the mounting hole by engaging with the periphery (see, for example, Patent Document 1). In this automobile antenna, when the cylindrical projecting portion of the antenna body is inserted into a rectangular antenna mounting hole formed in the vehicle body, the antenna body is prevented from coming out of the mounting hole. Can be attached.
JP 2001-36315 A

  However, in such a conventional automobile antenna, the cylindrical protrusion formed on the base portion is inserted into the mounting hole from the outside of the vehicle body, and the mounting nut is screwed onto the cylindrical protrusion from the inside of the vehicle body. Therefore, when mounting an automobile antenna, it was necessary to prepare a mounting nut separately from the antenna body. As described above, when the mounting nut is separated, there are problems that the mounting workability is deteriorated and the man-hours for managing the parts are increased.

  Therefore, an object of the present invention is to provide a vehicle-mounted antenna mounting structure that can improve mounting workability and can reduce the number of parts management man-hours.

  In order to achieve the above object, the on-vehicle antenna mounting structure of the present invention forms a rectangular protruding portion that protrudes from the lower surface of the base portion and can be inserted into a rectangular mounting hole, and extends from the rectangular protruding portion. Temporary assembly is performed by temporarily fixing the ground base inserted into the protruding portion with the fixing means. In this state, a substantially rectangular ground base is inserted into the rectangular mounting hole. Then, when the ground base is rotated by about 45 ° with respect to the rectangular protruding portion, the vehicle body is positioned between the plurality of abutting protruding portions formed on the ground base and the lower surface of the opposing base portion. The most important feature is to be sandwiched and fixed by the fixing means.

  According to the present invention, it is possible to attach the vehicle-mounted antenna to the vehicle body in a state where the ground base is temporarily fixed to the base portion by the fixing means and temporarily assembled. As a result, it is not necessary to separate the parts, so that the mounting workability can be improved and the number of parts management man-hours can be reduced.

  The object of providing an in-vehicle antenna mounting structure that improves the mounting workability and reduces the number of parts management man-hours has been realized by enabling mounting with the mounting parts temporarily assembled.

  FIG. 1 shows the configuration of an in-vehicle antenna provided with the in-vehicle antenna mounting structure of Example 1 of the present invention, and FIGS. 2 and 3 show the configuration of the in-vehicle antenna mounting structure of Example 1 of the present invention. A process of attaching the on-vehicle antenna attachment structure 1 is shown in FIGS. However, FIG. 1 is a plan view showing a configuration in which the vehicle-mounted antenna is mounted on the vehicle panel by the vehicle-mounted antenna mounting structure of the present invention, and FIG. 2 is a bottom view showing the configuration of the vehicle-mounted antenna mounting structure of the present invention. FIG. 2 is an exploded view showing the structure of the on-vehicle antenna mounting structure of the present invention in an exploded manner.

  As shown in these drawings, an in-vehicle antenna 1 having an antenna mounting structure according to the present invention includes an antenna element 11 and an antenna cover 12 to which the antenna element 11 is detachably mounted. The in-vehicle antenna 1 is attached to the vehicle panel 16 by screwing a bolt part 21 to a base part 13 disposed below the antenna cover 12 via a ground base 20. The antenna element 11 is composed of an element portion 11a, a top portion 11c having a diameter larger than that of the element portion 11a provided at the upper end thereof, and a flexible synthetic resin such as a rubber system formed at the lower portion of the element portion 11a. It is comprised from the molded element base 11b. The element base portion 11b absorbs the applied external force and prevents the element portion 11a from being broken by bending the element base portion 11b when an external force is applied to the element portion 11a.

  The in-vehicle antenna 1 is a multi-frequency antenna, which can be used in, for example, an AM radio band, an FM radio band, and a portable radio telephone band. A trap coil for multi-frequency connection to an element is used as an element base. 11b. The electrical length from the top part 11c of the antenna element 11 thus configured to the base end part of the in-vehicle antenna 1 is, for example, about ¼ wavelength of the FM radio band, and is built in the element base part 11b from the base end part. The electrical length to the lower end of the trap coil is about ¼ wavelength of the portable radio telephone band. As a result, the in-vehicle antenna 1 resonates with the portable radio telephone band and the FM radio band, and can receive the AM radio band as a whole.

  The antenna cover 12 made by resin molding to which the antenna element 11 is fixed is fitted to a base portion 13 made of metal made of die cast, for example, and is screwed and fixed by a pair of mounting screws. Has been. A space formed by the antenna cover 12 and the base portion 13 accommodates a circuit board incorporating a matching circuit and an amplifier circuit. In addition, a waterproof base pad 15 is inserted around the base portion 13, and a waterproof O-ring 14 is inserted into the base of the protruding portion protruding from the base portion 13, so that the vehicle-mounted antenna 1 is attached to the vehicle panel 16. By being attached, the vehicle-mounted antenna 1 is attached to the vehicle panel 16 with a watertight structure. A coaxial cable 17 that transmits a reception signal received by the antenna element 11 and a power supply cable 18 that supplies power to an amplifier circuit and the like are led out inside the vehicle panel 16.

  The base portion 13 includes an elliptical flat plate portion 13a, and extends from the lower surface of the flat plate portion 13a from a first protruding portion 13c having a rectangular cross section as shown in FIG. 3 and the first protruding portion 13c. The second protrusion 13d having a rectangular cross section that is made slightly smaller, the rectangular flange 13e formed below the second protrusion 13d, and the circular cross section extending from the lower surface of the flange 13e. Three projecting portions 13f are formed. A pair of projecting portions 13g extending in the axial direction is formed at opposing positions on the outer peripheral surface of the third projecting portion 13f.

  Next, the temporary assembly in the vehicle-mounted antenna mounting structure according to the present invention will be described with reference to FIG. 3. The lock spring 19 is fitted around the second projecting portion 13 d of the base portion 13 having the above-described configuration. To do. The lock spring 19 is formed in a rectangular shape in which one side is cut off by bending an elastic metal plate. As shown in FIG. 3, two cut and raised pieces 19a whose upper ends are inclined outward are formed on each side. Next, the ground base 20 having a cross-sectional shape in which one top portion of the rectangle is cut is inserted into the third projecting portion 13 f of the base portion 13.

  From each top part of the substantially rectangular ground base 20, a protruding part 20a is formed by extending, and a conical sharpened part 20b is formed at the tip of the protruding part 20a. Furthermore, a pair of engaging groove portions are formed in the fitting insertion holes of the ground base 20, and the protruding portions 13g formed on the outer peripheral surface of the third protruding portion 13f are engaged with the engaging groove portions. The ground base 20 is not rotatable with respect to the base portion 13. Next, the bolt portion 21 is inserted into the through hole of the ground base 20 and screwed into the screw holes formed in the first protruding portion 13c to the third protruding portion 13f. At this time, the bolt portion 21 is screwed into the screw hole so that the ground base 20 can move up and down. This state is a state where the in-vehicle antenna mounting structure is temporarily assembled.

  A bottom view in this temporarily assembled state is shown in FIG. As shown in FIG. 2, when the ground base 20 is fitted into the third protrusion 13f in a state where the protrusion 13g of the third protrusion 13f is engaged with the engaging groove of the ground base 20, the cross section is rectangular. The substantially rectangular ground base 20 is temporarily fixed in a state of being rotated about 45 ° with respect to the first projecting portion 13c to the flange portion 13e. Note that the ground base 20 cannot rotate with respect to the base portion 13 by the action of the engaging groove portion and the protruding portion 13g.

  In the vehicle-mounted antenna mounting structure according to the present invention, the vehicle-mounted antenna 1 is mounted on the vehicle panel 16 in such a temporarily assembled state. The attachment process will be described with reference to FIGS.

  First, as shown in FIG. 4, a rectangular mounting hole 16 a is formed in the vehicle panel 16. The size of the mounting hole 16a is set such that the first projecting portion 13c to the flange portion 13e having a rectangular cross section and the ground base 20 can be inserted together. Next, as shown in FIG. 5, when the base portion 13 is rotated about 45 ° with respect to the mounting hole 16a, the ground base 20 can be inserted into the mounting hole 16a. Therefore, the ground cable 20 is inserted into the mounting hole 16a after the coaxial cable 17 and the feeding cable 18 are inserted through the mounting hole 16a. In this state, each top portion of the rectangular flange portion 13e collides with the periphery of the front surface of the attachment hole 16a, and thus the flange portion 13e cannot be inserted into the attachment hole 16a.

  Here, as shown in FIG. 6, when the base portion 13 is rotated by 45 ° with respect to the mounting hole 16 a, the rectangular mounting hole 16 a extends from the flange portion 13 e having a rectangular cross section to the first projecting portion 13 c. It can be inserted. Therefore, the base portion 13 is rotated by 45 ° with respect to the attachment hole 16a, and the portion from the flange portion 13e to the first protruding portion 13c is inserted into the attachment hole 16a. At this time, the tip of the cut-and-raised piece 19a of the lock spring 19 fitted around the second projecting portion 13d comes into contact with the periphery of the lower surface of the mounting hole 16a, and the base portion 13 cannot be extracted from the vehicle panel 16. It becomes like this. Further, since the ground base 20 rotates about 45 ° with respect to the mounting hole 16a, the sharpened portion 20b formed at the tip of the protruding portion 20a formed at the top of the ground base 20 is around the back surface of the mounting hole 16a. It comes to face. In this state, when the bolt portion 21 is tightened in the screw hole of the base portion 13, the vehicle panel 16 is sandwiched and fixed between the sharpened portion 20 b and the receiving portion 13 b formed to protrude from the lower surface of the base portion 13. It becomes like this. In this case, since the receiving portion 13b faces the sharpened portion 20b, the sharpened portion 20b can be prevented from breaking through and deforming the vehicle panel 16.

  As described above, in the vehicle-mounted antenna mounting structure according to the present invention, the vehicle-mounted antenna 1 can be mounted on the vehicle panel 16 in a temporarily assembled state as shown in FIG. For this reason, it is not necessary to make the mounting parts separate, so that the mounting workability can be improved and the number of parts management man-hours can be reduced. Further, when the flange 13e to the first projecting portion 13c are inserted into the mounting hole 16a, the tip of the cut-and-raised piece 19a of the lock spring 19 comes into contact with the periphery of the lower surface of the mounting hole 16a, and the base portion 13 is attached to the vehicle. Since it becomes impossible to extract from the panel 16, the vehicle-mounted antenna 1 can be attached by one worker. When the base portion 13 is rotated by 45 ° with respect to the mounting hole 16a, the sharpened portion 20b formed at the tip of the protruding portion 20a formed at the top of the ground base 20 is on the back surface of the mounting hole 16a. Since it faces the periphery, the base portion 13 cannot be extracted from the vehicle panel 16 by this. From this, in the vehicle-mounted antenna mounting structure of the present invention according to the first embodiment, even if the lock spring 19 is omitted, the vehicle-mounted antenna 1 can be mounted by one worker.

  Next, each mounting part will be described with reference to FIGS. 7 (a), (b), (c), and (d) show the configuration of the base portion 13, FIG. 7 (a) is a top view showing the configuration of the base portion 13, and FIG. It is a bottom view, FIG.7 (c) is the side view, FIG.7 (d) is a side view shown with the cross section cut | disconnected by the AA line shown to Fig.7 (a).

  As shown in these drawings, the base portion 13 includes an elliptical flat plate portion 13a, and a rib 13h to which the antenna cover 12 is fitted is formed along the edge of the upper surface of the flat plate portion 13a. Yes. Further, a cable lead-out portion 13i for leading the coaxial cable 17 and the feeding cable 18 is formed so as to penetrate the flat plate portion 13a.

  Furthermore, from the lower surface of the flat plate part 13a, a first protrusion 13c having a rectangular cross section, a second protrusion 13d having a rectangular cross section extending from the first protrusion 13c, and a second protrusion A rectangular flange 13e is formed under the portion 13d. A third projecting portion 13f having a circular cross section that is further extended is formed from the lower surface of the flange portion 13e. A pair of projecting portions 13g extending in the axial direction is formed at opposing positions on the outer peripheral surface of the third projecting portion 13f. Furthermore, the receiving part 13b is each formed corresponding to 3 sides of the 1st protrusion part 13c. The receiving portion 13 b is a receiving portion that receives the sharpened portion 20 b formed at the tip of the protruding portion 20 a formed at the top of the ground base 20. Corresponding to the remaining one side of the first projecting portion 13c, a notch serving as a cable lead-out portion 13i is formed over the first projecting portion 13c or the flange portion 13e. Furthermore, a screw hole 13j into which a bolt portion 21 inserted through the ground base 20 is screwed is formed so as to penetrate the first protruding portion 13c to the third protruding portion 13f.

  8A, 8B, and 8C show the configuration of the lock spring 19. FIG. FIG. 8A is a plan view showing a configuration of the lock spring 19, FIG. 8B is a top view thereof, and FIG. 8C is a side view thereof.

  As shown in these drawings, the lock spring 19 is formed by bending an elastic metal plate into a substantially rectangular shape with one side of the rectangle cut off. A pair of cut and raised pieces 19a are formed on the three sides of the main body 19b of the lock spring 19 so as to be inclined outward. When the lock spring 19 is fitted around the second projecting portion 13d of the base portion 13 and the second projecting portion 13d is inserted into the rectangular mounting hole 16a formed in the vehicle panel 16, it is cut off. The base portion 13 is prevented from coming out of the mounting hole 16a by the tip of the raised piece 19a coming into contact with the periphery of the back surface of the mounting hole 16a. The cut and raised pieces 19a are not limited to two on each side, and may be one on each side or three or more on each side.

  9A, 9B and 9C show the configuration of the ground base 20. FIG. 9A is a plan view showing the configuration of the ground base 20, FIG. 9B is a front view thereof, and FIG. 9C is a side view thereof.

  As shown in these drawings, the ground base 20 is made of metal, and the main body portion 20c has a substantially rectangular cross-sectional shape obtained by cutting one of the rectangular top portions. Protruding portions 20a are formed to protrude from the three top portions of the main body portion 20c, and a conical sharpened portion 20b is formed at the tip of the protruding portion 20a. In addition, a through hole 20f through which the bolt part 21 is inserted is formed substantially at the center of the main body part 20c, and a fitting insertion hole 20d into which the third projecting part 13f of the base part 13 is fitted is formed around the through hole 20f. Has been. An engagement groove 20e extending in the pair of axial directions is formed at a position facing the inner peripheral surface of the insertion hole 20d. When the protrusion 13g formed on the outer periphery of the third protrusion 13f in the base portion 13 is engaged with the engaging groove 20e, and the ground base 20 is fitted into the base portion 13, the base portion 13 is inserted. The ground base 20 is inserted by rotating about 45 °. The reason why one of the top portions of the main body portion 20c is cut is to lead out the cable from the cut portion.

  The vehicle panel to which the in-vehicle antenna is attached is not always flat but has a suitable rounded part. When mounting a vehicle-mounted antenna to such a rounded part by the vehicle-mounted antenna mounting structure described as the first embodiment, there is a case where the vehicle-mounted antenna is hindered when the roundness increases. In the in-vehicle antenna mounting structure described as the first embodiment, the base portion, that is, the entire in-vehicle antenna needs to be rotated by about 45 ° after being inserted into the rectangular mounting hole in the temporarily assembled state. This is because the base portion may collide with the roundness and become unable to rotate when the value becomes large. Therefore, in the second embodiment, the entire vehicle-mounted antenna is attached without rotating after being inserted into the rectangular attachment hole in a temporarily assembled state. The on-vehicle antenna mounting structure of the present invention according to the second embodiment will be described below.

  FIG. 10 shows the configuration of an in-vehicle antenna provided with the in-vehicle antenna mounting structure according to Example 2 of the present invention, and FIGS. 11, 12 and 16 show the configuration of the in-vehicle antenna mounting structure according to Example 2 of the present invention. The process of attaching the vehicle-mounted antenna attachment structure according to Example 2 of the present invention is shown in FIGS. However, FIG. 10 is a plan view showing a part of a configuration in which the vehicle-mounted antenna is attached to the vehicle panel by the vehicle-mounted antenna mounting structure according to the second embodiment of the present invention, and FIG. 11 is a vehicle-mounted antenna according to the second embodiment of the present invention. FIG. 12 is an exploded view showing the structure of the in-vehicle antenna mounting structure according to the second embodiment of the present invention, and FIG. 16 is an exploded view showing the structure of the mounting structure temporarily assembled. It is a bottom view which shows the structure after attachment of the vehicle-mounted antenna attachment structure concerning Example 2. FIG.

  As shown in these drawings, the in-vehicle antenna 2 including the antenna mounting structure according to the second embodiment of the present invention includes an antenna element (not shown) and an antenna cover 52 to which the antenna element is detachably mounted. The in-vehicle antenna 2 is attached to the vehicle panel 56 by screwing a bolt part 61 to a base part 53 disposed below the antenna cover 52 via a ground base 60. Since the antenna element has the same configuration as that of the antenna element 11 according to the first embodiment shown in FIG. The in-vehicle antenna 2 is a multi-frequency antenna having the same configuration as the in-vehicle antenna 1 according to the first embodiment.

  The antenna cover 52 made of resin molding to which the antenna element is fixed is fitted to a base portion 53 made of metal made of die cast, for example, and is screwed and fixed by a pair of mounting screws. . A space formed by the antenna cover 52 and the base portion 53 accommodates a circuit board incorporating a matching circuit and an amplifier circuit. A waterproof base pad 55 is fitted around the base portion 53, and a waterproof O-ring 54 is fitted into the base of the protruding portion protruding from the lower surface of the base portion 53, so that the vehicle-mounted antenna 2 is attached to the vehicle panel 56. By being attached, the vehicle-mounted antenna 2 is attached to the vehicle panel 56 with a watertight structure. A coaxial cable 57 that transmits a reception signal received by the antenna element and a power supply cable 58 that supplies power to an amplifier circuit and the like are led out inside the vehicle panel 56.

  The base portion 53 includes an elliptical flat plate portion 53a, and extends from the lower surface of the flat plate portion 53a from a first protruding portion 53c having a rectangular cross section as shown in FIG. 12, and the first protruding portion 53c. A second protrusion 53d having a rectangular cross-section that is made slightly smaller, a rectangular flange 53e formed under the second protrusion 53d, and a circular cross-section extending from the lower surface of the flange 53e. Three projecting portions 53f are formed. A pair of guide rail portions 53g composed of two ridges inclined to the upper right are formed at positions facing the outer peripheral surface of the third protrusion 53f. Further, an O-ring storage groove 54a into which the O-ring 54 is fitted is formed in a ring shape on the lower surface of the flat plate portion 53a so as to surround the first protruding portion 53c.

  Next, the temporary assembly in the in-vehicle antenna mounting structure according to the second embodiment of the present invention will be described with reference to FIG. 12. The lock spring around the second projecting portion 53d of the base portion 53 configured as described above. 59 is inserted. The lock spring 59 is formed in a rectangular shape in which one side is cut off by bending an elastic metal plate. As shown in FIG. 12, two cut and raised pieces 59a whose upper ends are inclined outward are formed on each side. Next, the ground base 60 having a cross-sectional shape in which one top portion of the rectangle is cut is inserted into the third projecting portion 53 f of the base portion 53.

  From each top part of the substantially rectangular ground base 60, a protruding part 60a is formed by extending, and a conical sharpened part 60b is formed at the tip of the protruding part 60a. Furthermore, a pair of engaging protrusions are formed in the insertion holes of the ground base 60, and these engaging protrusions are engaged with the entrance of the guide rail portion 53g formed on the outer peripheral surface of the third protrusion 53f. To do. Next, the bolt part 61 is inserted into the through hole of the ground base 60 and screwed into the screw holes formed in the first projecting part 53c to the third projecting part 53f. At this time, the bolt part 61 is screwed into the screw hole only to such an extent that the engagement protrusion can be kept engaged with the entrance of the guide rail part 53g. This state is a state where the in-vehicle antenna mounting structure is temporarily assembled.

  A bottom view in this temporarily assembled state is shown in FIG. As shown in FIG. 11, when the ground base 60 is fitted into the third protrusion 53f, the engaging protrusion on the ground base 60 is engaged with the entrance of the guide rail 53g in the third protrusion 53f. In this state, the ground base 60 having a substantially rectangular cross section is temporarily fixed so as to overlap the first protrusion 53c or the flange 53e having a rectangular cross section. As will be described later, the engaging projection can slide along the guide rail 53g.

  In the vehicle-mounted antenna mounting structure according to the second embodiment of the present invention, the vehicle-mounted antenna 2 is mounted on the vehicle panel 56 in such a temporarily assembled state. The attachment process will be described with reference to FIGS.

  First, as shown in FIG. 13, a rectangular attachment hole 56 a is formed in the vehicle panel 56. The size of the mounting hole 56a is set such that the first projecting portion 53c to the flange portion 53e having a rectangular cross section and the ground base 60 can be inserted together. Next, the coaxial cable 57 and the power feeding cable 58 are inserted through the attachment hole 56a and then inserted from the ground base 60 into the attachment hole 56a. In this case, since the first protrusion 53c or the flange 53e having a rectangular cross section overlaps the ground base 60 having a substantially rectangular cross section, the first protrusion 53c is inserted into the mounting hole 56a. become.

  When the first protrusion 53c is inserted through the mounting hole 56a, the tip of the cut-and-raised piece 59a of the lock spring 59 fitted around the second protrusion 53d comes into contact with the periphery of the lower surface of the mounting hole 56a. Thus, the base portion 53 cannot be extracted from the vehicle panel 56. In this state, when the bolt portion 61 is screwed into the screw hole provided in the base portion 53, the engaging protrusion formed in the fitting insertion hole is moved into the guide rail portion 53g as the ground base 60 is raised. Will slide up. In this case, since the guide rail portion 53g is inclined to the upper right, the ground base 60 rotates to the right as it rises. Then, when the engaging protrusion that has slid in the guide rail portion 53g is guided to the upper end of the guide rail portion 53g, the ground base 60 is about 45 with respect to the base portion 53 as shown in FIG. ° Rotate.

  Accordingly, the sharpened portion 60b formed at the tip of the protruding portion 60a formed at the top of the ground base 60 is opposed to the periphery of the back surface of the mounting hole 56a. In this state, when the bolt portion 61 is further tightened into the screw hole of the base portion 53, the vehicle panel 56 is sandwiched and fixed between the sharpened portion 60b and the receiving portion 53b formed to protrude from the lower surface of the base portion 53. Become so. In this case, since the receiving portion 53b faces the sharpened portion 60b, the sharpened portion 60b can be prevented from breaking through and deforming the vehicle panel 56. FIG. 16 shows a configuration in which the vehicle panel 56 is transparent when the in-vehicle antenna 2 is attached to the vehicle panel 56 in this way.

  As described above, in the in-vehicle antenna mounting structure according to the second embodiment of the present invention, the lower part of the in-vehicle antenna 2 is inserted into the mounting hole 56a of the vehicle panel 56 in the temporarily assembled state as shown in FIG. Can be installed without doing. For this reason, the vehicle-mounted antenna 2 can be attached to the part where the vehicle panel 56 is rounded without trouble. In addition, it is not necessary to make separate mounting parts, so that the mounting workability can be improved and the number of parts management man-hours can be reduced. Further, when the ground base 60 to the first projecting portion 53c are inserted into the mounting hole 56a, the tip of the cut-and-raised piece 59a of the lock spring 59 comes into contact with the periphery of the lower surface of the mounting hole 56a, so that the base portion 53 is Since it becomes impossible to extract from the panel 56, the vehicle-mounted antenna 2 can be attached by one worker.

  Next, the structure of the base part 53 and the ground base 60 is demonstrated with reference to FIG. 17 and FIG. The lock spring 59 has the same configuration as that of the lock spring 19, and the description thereof is omitted.

  17A is a front view showing the configuration of the base portion 53, FIG. 17B is a bottom view thereof, and FIG. 17C is a side view thereof. As shown in these drawings, the base portion 53 includes an elliptic flat plate portion 53a, and two antenna covers 52 are fitted along the edge of the upper surface of the flat plate portion 53a. The antenna cover 52 and the base portion 53 are integrated by fastening the screw inserted through the screw hole to the antenna cover 52. Further, a cable lead-out portion 53i for leading the coaxial cable 17 and the feeding cable 18 is formed so as to penetrate the flat plate portion 53a. Note that an O-ring housing groove 54a into which the O-ring 54 is fitted is formed in a ring shape on the lower surface of the flat plate portion 53a so as to surround the first protruding portion 53c.

  Furthermore, from the lower surface of the flat plate portion 53a, a first protrusion 53c having a rectangular cross section, a second protrusion 53d having a rectangular cross section extending from the first protrusion 53c, and a second protrusion A flange 53e having a rectangular cross section is formed under the portion 53d. A third projecting portion 53f having a circular cross section that is further extended is formed from the lower surface of the flange portion 53e. A pair of guide rail portions 53g composed of two ridges inclined to the upper right are formed at positions facing the outer peripheral surface of the third protrusion 53f. Furthermore, the receiving part 53b is each formed corresponding to 3 sides of the 1st protrusion part 53c. The receiving portion 53 b is a receiving portion that receives the sharpened portion 60 b formed at the tip of the protruding portion 60 a formed at the top of the ground base 60. Corresponding to the remaining one side of the first projecting portion 53c, a notch serving as a cable lead-out portion 53i is formed over the first projecting portion 53c or the flange portion 53e. Furthermore, a screw hole 53j into which a bolt part 61 inserted through the ground base 60 is screwed is formed so as to penetrate the first projecting part 53c to the third projecting part 53f.

  18A, 18B, and 18C show the configuration of the ground base 60. FIG. 18A is a plan view showing the configuration of the ground base 60, FIG. 18B is a front view thereof, and FIG. 18C is a side view thereof.

  As shown in these drawings, the ground base 60 is made of metal, and the main body portion 60c has a substantially rectangular cross-sectional shape obtained by cutting out one of the rectangular top portions. Protruding portions 60a are formed to protrude from the three top portions of the main body portion 60c, and a conical sharpened portion 60b is formed at the tip of the protruding portion 60a. In addition, a through hole 60f through which the bolt part 61 is inserted is formed substantially at the center of the main body part 60c, and a fitting insertion hole 60d into which the third projecting part 53f of the base part 53 is fitted is formed around the through hole 60f. Has been. A pair of engaging protrusions 60e extending in the axial direction are formed at opposing positions on the inner peripheral surface of the fitting insertion hole 60d. When the engaging base 60e is engaged with the inlet of the guide rail 53g formed on the outer periphery of the third protrusion 53f in the base 53, and the ground base 60 is inserted into the base 53, the base The substantially rectangular ground base 60 overlaps the rectangular portion 53. Then, by fastening the bolt part 61 inserted through the ground base 60 to the base part 53, the ground base 60 rotates about 45 ° relative to the base part 53. The reason why one of the top portions of the main body 60c is cut is to lead out the cable from the cut portion. In addition, it is not restricted to the acute part 60bha cone shape, It can be set as the various shape which bites into the vehicle panel 56. FIG.

  By the way, after the bolt part 61 is inserted into the through-hole 60 f provided in the ground base 60, the bolt part 61 is screwed into the screw hole 53 j provided in the base part 53. Therefore, workability can be further improved if the bolt portion 61 is temporarily fixed so as not to come out of the through hole 60f of the ground base 60. This configuration is shown in a sectional view in FIG. As shown in this figure, when the bolt part 61 is inserted into the through hole 60f, a cylindrical resin washer 62 formed by resin molding is fitted into the part inserted through the through hole 60f. Since the resin washer 62 is formed in such a size as to be in close contact with the bolt part 61, the bolt part 61 does not fall off the through hole 60f by being inserted into the bolt part 61. In this state, since the temporary assembly can be performed by screwing the bolt part 61 into the base part 53, the workability can be further improved.

  A configuration in which the bolt portion 61 is temporarily fixed to the through hole 60f shown in FIG. 19 by the resin washer 62 may be applied to the first embodiment. That is, the workability may be further improved by fitting the resin washer 62 into the bolt part 21 to temporarily fix the bolt part 21 in the through hole 20f.

  In the above description, the vehicle-mounted antenna mounting structure for mounting the vehicle-mounted antenna is used. The present invention can be applied to an attachment structure when attaching an attachment.

It is a figure which shows the structure of a vehicle-mounted antenna provided with the vehicle-mounted antenna attachment structure of Example 1 of this invention. It is a bottom view which shows the structure of the vehicle-mounted antenna attachment structure of Example 1 of this invention. It is a disassembled assembly figure which shows the vehicle-mounted antenna attachment structure of Example 1 of this invention. It is a figure which shows the 1st process of attaching the vehicle-mounted antenna attachment structure of Example 1 of this invention. It is a figure which shows the 2nd process of attaching the vehicle-mounted antenna attachment structure of Example 1 of this invention. It is a figure which shows the 3rd process of attaching the vehicle-mounted antenna attachment structure of Example 1 of this invention. It is a figure which shows the detailed structure of the base part in the vehicle-mounted antenna attachment structure of Example 1 of this invention. It is a figure which shows the detailed structure of the lock spring in the vehicle-mounted antenna attachment structure of Example 1 of this invention. It is a figure which shows the detailed structure of the ground base in the vehicle-mounted antenna attachment structure of Example 1 of this invention. It is a figure which shows the structure of a vehicle-mounted antenna provided with the vehicle-mounted antenna attachment structure of Example 2 of this invention. It is a bottom view which shows the structure of the vehicle-mounted antenna attachment structure of Example 2 of this invention. It is an exploded assembly figure which shows the vehicle-mounted antenna attachment structure of Example 2 of this invention. It is a figure which shows the 1st process of attaching the vehicle-mounted antenna attachment structure of Example 2 of this invention. It is a figure which shows the 2nd process of attaching the vehicle-mounted antenna attachment structure of Example 2 of this invention. It is a figure which shows the 3rd process of attaching the vehicle-mounted antenna attachment structure of Example 2 of this invention. It is a bottom view which shows the structure after attachment of the vehicle-mounted antenna attachment structure of Example 2 of this invention. It is a figure which shows the detailed structure of the base part in the vehicle-mounted antenna attachment structure of Example 2 of this invention. It is a figure which shows the detailed structure of the ground base in the vehicle-mounted antenna attachment structure of Example 2 of this invention. It is a figure which shows the structure which prevents a volt | bolt part from pulling out from the through-hole of a ground base in the vehicle-mounted antenna attachment structure of Example 1 of this invention. It is a figure for demonstrating the attachment method of the conventional antenna for motor vehicles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 In-vehicle antenna, 2 In-vehicle antenna, 11 Antenna element, 11a Element part, 11b Element base part, 11c Top part, 12 Antenna cover, 13 Base part, 13a Flat plate part, 13b Receiving part, 13c 1st protrusion part, 13d 2nd protrusion Part, 13e collar part, 13f third protrusion part, 13g protrusion part, 13h rib, 13i cable lead-out part, 13j screw hole, 14 O-ring, 15 base pad, 16 vehicle panel, 16a mounting hole, 17 coaxial cable, 18 Cable, 19 Lock spring, 19a Cut and raised piece, 19b Main body part, 20 Ground base, 20a Protruding part, 20b Sharpened part, 20c Main body part, 20d Insertion hole, 20e Engaging groove part, 20f Through hole, 21 Bolt part, 52 Antenna cover, 53 base portion, 53a flat plate portion, 53b receiving portion, 53 1st protrusion, 53d 2nd protrusion, 53e collar, 53f 3rd protrusion, 53g guide rail, 53i cable outlet, 53j screw hole, 54 O-ring, 55 base pad, 56 vehicle panel, 56a mounting hole , 57 Coaxial cable, 58 Power supply cable, 59 Lock spring, 59a Cut and raised piece, 60 Ground base, 60a Projection part, 60b Sharp part, 60c Body part, 60d Insertion hole, 60e Engagement projection part, 60f Through hole, 61 Bolt part, 62 resin washer, 101a antenna cover, 102 mounting nut, 102a washer part, 102b nut part, 113 cylindrical protrusion, 120 roof panel

Claims (9)

A base portion for fixing an antenna body having an antenna element to a vehicle body;
It is formed so as to protrude from the lower surface of the base portion, and can be inserted into a protruding portion extending from a rectangular protruding portion that can be inserted into a rectangular mounting hole formed in the vehicle body so as not to rotate. A substantially rectangular ground base insertable into the rectangular mounting hole having a plurality of abutting protrusions formed at a plurality of top positions in a rectangle;
At least a fixing means capable of temporarily fixing and fixing the ground base to the projecting portion of the base portion,
When the ground base is inserted into the projecting portion and temporarily fixed by the fixing means, the ground base is held in a state of being rotated by about 45 ° with respect to the rectangular projecting portion. By inserting a base into the rectangular mounting hole and rotating about 45 °, the vehicle body is sandwiched between the front end of the abutting protrusion and the lower surface of the base portion, and the fixing means An in-vehicle antenna mounting structure characterized by being fixed by the above.   When the ground base is fitted into the protrusion, the engagement groove formed on the ground base engages with the protrusion formed on the outer peripheral portion of the protrusion, so that the rectangular shape The in-vehicle antenna mounting structure according to claim 1, wherein the ground base is held in a state of being rotated by about 45 ° with respect to the protruding portion.   A lock spring having a cut-and-raised piece inclined outward is inserted into each side of the substantially rectangular shape from which one side is cut, and is inserted along the outer periphery of the rectangular protrusion. When the ground base is inserted into the rectangular mounting hole and rotated about 45 ° in the assembled state, the rectangular protruding portion is inserted into the rectangular mounting hole, and the cut-and-raised piece in the lock spring is inserted. The vehicle-mounted antenna mounting structure according to claim 1, wherein a tip of the antenna can be brought into contact with a back surface of the rectangular mounting hole.   The tip of the projecting portion for abutment is sharpened, and a receiving portion projecting from the bottom surface of the base portion is formed on the bottom surface of the base portion facing the tip. The in-vehicle antenna mounting structure described.   One of the tops of the ground base, which has a substantially rectangular shape, is cut off, and a cable lead-out portion is formed in the cut-out portion to lead out a cable that passes through the base portion and is introduced into the vehicle body. The on-vehicle antenna mounting structure according to claim 1. A base portion for fixing an antenna body having an antenna element to a vehicle body;
When projecting from and inserted into a projecting portion which is formed so as to project from the lower surface of the base portion and extends from a rectangular projecting portion which can be inserted into a rectangular mounting hole formed in the vehicle body. In the rectangular mounting hole, the engaging projections engaging with the guides formed on the outer peripheral surface of the projections and the contact projections formed at the positions of the tops of the rectangle. A substantially rectangular ground base that can be inserted;
At least a fixing means capable of temporarily fixing and fixing the ground base to the projecting portion of the base portion,
When the engagement protrusion is engaged with the entrance of the guide portion, the ground base is fitted into the protrusion and temporarily fixed by the fixing means, the rectangular protrusion is substantially rectangular. The ground base is held in a substantially overlapping state, and when the ground base is inserted into the rectangular mounting hole and fixed by the fixing means in the temporarily assembled state, the inside of the guide portion is engaged with the engaging protrusion. Is guided and the ground base is rotated by about 45 °, whereby the vehicle body is sandwiched between the tip of the abutting protrusion and the lower surface of the base portion facing and fixed by the fixing means. An in-vehicle antenna mounting structure characterized by the above.   A lock spring having a cut-and-raised piece inclined outward is inserted into each side of the substantially rectangular shape from which one side is cut, and is inserted along the outer periphery of the rectangular protrusion. When the ground base is inserted into the rectangular attachment hole in the assembled state, the rectangular protrusion is also inserted into the rectangular attachment hole, and the tip of the cut-and-raised piece in the lock spring is the rectangular shape. The on-vehicle antenna mounting structure according to claim 6, wherein the mounting surface can be brought into contact with the back surface of the mounting hole.   The tip of the projecting portion for contact is sharpened, and a receiving portion projecting from the bottom surface of the base portion is formed on the bottom surface of the base portion facing the tip. The in-vehicle antenna mounting structure described. One of the tops of the ground base, which has a substantially rectangular shape, is cut out, and a cable lead-out portion is formed in the cut-out portion to lead out a cable that passes through the base portion and is introduced into the vehicle body. The in-vehicle antenna mounting structure according to claim 6.

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