On-vehicle device and method of replacing waterproofing part thereof

Abstract

To provide an antenna device that enables the waterproof performance to increase.SOLUTION: An on-vehicle device includes a base, a fitting part located below the base, and an elastic member having a hole that is penetrated by at least a part of the fitting part. The elastic member has a protrusion surrounding the hole and projecting downward, a thick part surrounding the protrusion, and a thin part surrounding the thick part.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to an in-vehicle device and a method for replacing a waterproof portion of the in-vehicle device. [Background technology]

[0002] The following Patent Document 1 discloses a composite antenna device including a base pad interposed between a base and a vehicle body. The base pad has an annular protrusion (annular pad portion) that is in close contact with the vehicle body to seal and waterproof the gap between the vehicle body and the base pad. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-061175 A Summary of the Invention [Problem to be solved by the invention]

[0004] An example of an object of the present invention is to improve the waterproof performance of an in-vehicle device. Other objects of the present invention will become apparent from the description of this specification. [Means for solving the problem]

[0005] One aspect of the present invention is an in-vehicle device comprising a base, a mounting portion located below the base, and an elastic member having a hole through which at least a portion of the mounting portion passes, the elastic member having a convex portion surrounding the hole and protruding downward, a thick portion surrounding the convex portion, and a thin portion surrounding the thick portion.

[0006] One aspect of the present invention is a method for replacing a waterproof part of an in-vehicle device, the in-vehicle device comprising: a base; a mounting portion located below the base; and an elastic member having a hole through which at least a portion of the mounting portion passes, the elastic member having a waterproof part surrounding the hole and including a convex portion protruding downward and a thick-walled portion surrounding the convex portion, and a groove portion surrounding the waterproof part, the method comprising: a first step of cutting the waterproof part from the groove portion along the groove portion; and a second step of attaching another waterproof part to the underside of the base.

[0007] According to the above aspect of the present invention, the waterproof performance of the vehicle-mounted device can be improved. [Brief description of the drawings]

[0008] [Figure 1] 1 is a top perspective view of an antenna device 1 according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a bottom perspective view of the antenna device 1, with a mounting surface 100 also shown in a simplified manner. [Diagram 3] FIG. 2 is an exploded top perspective view of the antenna device 1. [Figure 4] 2 is an exploded perspective view of the antenna device 1 from below. FIG. [Diagram 5] 2 is a top perspective view of a pad 30 of the antenna device 1. FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 7. [Figure 9] FIG. 9 is an enlarged view of part IX in FIG. 8. [Figure 10] 11 is a graph showing the results of a simulation of the relationship between the amount of compression and reaction force of the pad 30 in each of the antenna device 1 and the comparative example. [Figure 11] FIG. 13 is an explanatory diagram of a method for replacing a waterproof portion of the antenna device 1, showing the state before a replacement portion of the pad 30 (the portion inside the groove portion 37) is cut off. [Figure 12]FIG. 13 is an explanatory diagram of a method for replacing the waterproof part of the antenna device 1, showing the state after the replacement part of the pad 30 (the part inside the groove part 37) has been cut off. [Figure 13] FIG. 13 is an explanatory diagram of a method for replacing a waterproof portion of the antenna device 1, showing the state before a replacement seal 70 is attached. [Figure 14] FIG. 13 is an explanatory diagram of a method for replacing the waterproof portion of the antenna device 1, showing the state after a replacement seal 70 has been attached. [Figure 15] FIG. 11 is a side cross-sectional view of a pad 130 of an antenna device according to a second embodiment of the present invention. [Figure 16] Enlarged view of part XVI in Figure 15. [Figure 17] 13 is a graph showing the results of a simulation of the relationship between the amount of compression and reaction force of the pad 130 in each of the antenna device of the second embodiment and the comparative example. [Figure 18] 13 is a diagram showing an example in which a seal 170 is hooked and locked into a through hole 121 of an insulating base 20. FIG. [Figure 19] 13 is a diagram showing an example in which the seal 270 is press-fitted into the hole 122 of the insulating base 120. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the antenna device 1 will be described with reference to the drawings as an example of an in-vehicle device. Note that the embodiment is not limited to the following embodiment. The present invention can be applied to any in-vehicle device, and can also be applied to devices that do not have an antenna, such as a camera device or a radar device. Furthermore, the contents described in one embodiment are, in principle, also applicable to other embodiments. Furthermore, each embodiment and each modified example can be appropriately combined.

[0010] (Embodiment 1) 1 to 14 relate to an antenna device 1 according to a first embodiment of the present invention and a pad 30 as an elastic member. As shown in FIG. 1, the antenna device 1 is an antenna mounted on a vehicle, specifically a pole antenna or a micro antenna. FIG. 2 shows an imaginary mounting surface 100 of the antenna device 1. The mounting surface 100 is, for example, the roof or bonnet of a vehicle. A through hole 101 for mounting the antenna device 1 is opened in the mounting surface 100. FIGS. 1 to 4, 7, and 8 define the front-rear, up-down, and left-right directions of the antenna device 1 and the pad 30, which are mutually orthogonal. The front direction is the traveling direction of the vehicle to which the antenna device 1 is to be mounted. The up-down direction is a direction perpendicular to the mounting surface 100 of the antenna device 1.

[0011] 1 to 4, the antenna device 1 includes a conductive base 10, an insulating base 20, a pad 30, a washer 50, and a bolt 59. The antenna device 1 of this embodiment further includes a circuit board 15, a case 45, and a pole portion 47.

[0012] The conductive base 10 is made of, for example, metal, and has a base portion 11, a screw boss portion 12, a positioning through hole 13, and a boss 14, as shown in FIGS.

[0013] The base 11 is a plate-like portion that is approximately perpendicular to the up-down direction. In the illustrated example, there are two screw boss portions 12, each of which rises upward from the base 11. A screw 18 for attaching a circuit board 15 is screwed into each screw boss portion 12. In the illustrated example, there are two positioning through holes 13, each of which passes through the base 11 in the up-down direction. A positioning boss 24 of the insulating base 20 is inserted into each positioning through hole 13. The boss 14 protrudes downward from the base 11. The boss 14 has a screw hole 14a. A bolt 59 is screwed into the screw hole 14a. The number of screw boss portions 12 and positioning through holes 13 is not limited to the above-mentioned number, and can be set appropriately as necessary.

[0014] The circuit board 15 has two notches 17. The circuit board 15 is attached and fixed to the conductive base 10 by two screws 18 (fastening members) that pass through the notches 17 and screw into the screw bosses 12 of the conductive base 10. The circuit board 15 is installed approximately perpendicular to the up-down direction. The circuit board 15 is provided with a terminal portion 19. The terminal portion 19 is electrically connected to a terminal portion 48 shown in FIG. 4. The electrical connection between the terminal portion 19 of the circuit board 15 and the terminal 48 provides electrical continuity to an antenna element (not shown) connected to the terminal portion 48. The circuit board 15 is electrically connected to a coaxial cable 16. The coaxial cable 16 extends downward from the circuit board 15, passes through a through hole 101 in the mounting surface 100, and extends below the mounting surface 100, i.e., inside the vehicle to which the antenna device 1 is attached. A signal received by the antenna device 1 is transmitted to electronic devices of the vehicle to which the antenna device 1 is attached via the coaxial cable 16.

[0015] The insulating base 20 is made of, for example, resin. In this embodiment, the insulating base 20, together with the conductive base 10, constitutes the base of the antenna device 1. As shown in Figs. 3 and 4, the insulating base 20 has a base 21, a boss insertion hole 22, a claw portion 23 (snap fit), a positioning boss 24, a screw through hole 25, and a claw portion 26 (snap fit).

[0016] The base may be composed of an insulating base 20 and a flat metal plate. Also, a metal plate may be used in addition to the insulating base 20 and the conductive base 10, or the base may be composed of only the die-cast conductive base 10. In addition, in the case of an in-vehicle device that does not require a ground, the base may be composed of only the insulating base 20.

[0017] The base 21 is a plate-like portion that is approximately perpendicular to the up-down direction. The boss insertion hole 22 penetrates the base 21 in the up-down direction. The boss 14 of the conductive base 10 is inserted into the boss insertion hole 22. In the illustrated example, there are two claw portions 23, which are provided above the left and right sides of the boss insertion hole 22. The conductive base 10 is engaged with each claw portion 23, thereby locking the conductive base 10 to the insulating base 20.

[0018] In the illustrated example, there are two positioning bosses 24, each of which rises upward from the base 21. The positioning bosses 24 are inserted into the positioning through holes 13 of the conductive base 10, thereby determining the position of the conductive base 10 relative to the insulating base 20. In the illustrated example, there are two screw through holes 25, which penetrate the insulating base 20 in the up-down direction at the front end and rear end of the insulating base 20. A screw 57, which will be described later, penetrates each screw through hole 25. In the illustrated example, there are three claw portions 26, each of which is provided below the periphery of the boss insertion hole 22. Each claw portion 26 is hooked onto the edge of a through hole 101 (a through hole through which a bolt 59 or the like passes) provided in the mounting surface 100, thereby locking (temporarily fixing) the antenna device 1 to the mounting surface 100. The number of claw portions 23, claw portions 26, screw through holes 25, etc. is not limited to the above-mentioned number, and can be set appropriately as necessary.

[0019] The pad 30 is an elastic member made of resin such as rubber or elastomer. The pad 30 is interposed between the insulating base 20 and the mounting surface 100, and also between the case 45 and the mounting surface 100. The pad 30 has a base 31, a guide portion 34, a convex portion 35, a thick portion 36, and a groove portion 37 as a thin portion. The pad 30 also has a boss insertion hole 32 and a screw through hole 33 formed as insertion holes.

[0020] The base 31 is a plate-like portion that is approximately perpendicular to the up-down direction. The boss insertion hole 32 penetrates the base 31 in the up-down direction. The boss 14 of the conductive base 10 is inserted into the boss insertion hole 32. In the illustrated example, there are two screw through holes 33, each of which penetrates the base 31 in the up-down direction. A screw 57 (described later) penetrates each screw through hole 33. The guide portion 34 is a rib that protrudes upward from the base 31. The guide portion 34 has a shape that surrounds the boss insertion hole 32 and goes around the periphery of the boss insertion hole 32. The insulating base 20 fits inside the guide portion 34. The configuration of other parts of the pad 30 will be described later.

[0021] The case 45 (antenna case) is, for example, a resin molded body, and covers the conductive base 10 and the insulating base 20. As shown in Fig. 4, the case 45 has a screw boss portion 46. In this embodiment, there are two screw boss portions 46, each of which protrudes downward from the inner surface of the case 45. Two screws 57 as fastening members pass through the screw through hole 33 of the pad 30 and the screw through hole 25 of the insulating base 20, respectively, and are screwed into the screw boss portion 46 of the case 45. This fixes the case 45, the insulating base 20, and the pad 30 to one another.

[0022] The pole portion 47 is detachably attached to the case 45 and rotatably supported by the case 45. The pole portion 47 extends rearward and upward from the case 45. The pole portion 47 has a helical element (not shown) therein as an antenna element. A signal is transmitted from this helical element to the vehicle side via a terminal portion 48 of the case 45, a terminal portion 19 of the circuit board 15, and the coaxial cable 16.

[0023] 3 and 4, the washer 50 has a base portion 51, a bolt through hole 52, a holding portion 53, and a biting portion 54. The washer 50 is sandwiched between the conductive base 10 and a bolt 59.

[0024] The base 51 is a plate-like portion that is approximately perpendicular to the up-down direction. The bolt through-hole 52 passes through the base 51 in the up-down direction. A bolt 59 made of a conductor such as metal passes through the bolt through-hole 52 and is screwed into the screw hole 14a of the boss 14 of the conductive base 10. In this way, the antenna device 1 is attached (fixed) to the attachment surface 100.

[0025] In the illustrated example, there are two holding portions 53, each of which extends upward from the base portion 51. Each holding portion 53 fits into a fitting hole 14b provided around the boss 14 of the conductive base 10 to position and temporarily fix the washer 50. In the illustrated example, there are four biting portions 54, each of which extends upward from the base portion 51. When attaching the antenna device 1 to the mounting surface 100, a bolt 59 is screwed into the screw hole 14a of the boss 14. When the bolt 59 is screwed, the middle portion of each holding portion 53 is bent, and the tip portion of each biting portion 54 bites into the lower surface of the mounting surface 100, and is electrically connected to the mounting surface 100 made of a conductor such as metal. The mounting surface 100 and the conductive base 10 are electrically connected via the washer 50 and the bolt 59. The washer 50 and the bolt 59 , together with the boss 14 of the conductive base 10 , constitute a mounting portion for mounting the antenna device 1 to the mounting surface 100 .

[0026] The antenna device 1 is characterized by a waterproof structure provided by the pad 30. This will be described in detail below.

[0027] As shown in Figs. 2, 4, 6 and 8, the protrusion 35 is a rib protruding downward from the lower surface of the base 31. The protrusion 35 has a shape surrounding the boss insertion hole 32, and goes around the periphery of the boss insertion hole 32. When pressed against the upper surface of the mounting surface 100, the protrusion 35 elastically deforms toward the opposite side to the boss insertion hole 32, and provides a watertight seal between the pad 30 and the mounting surface 100. The contact between the pad 30 and the mounting surface 100 prevents (suppresses) water from entering the inside of the antenna device 1. In addition, the protrusion 35 prevents (suppresses) water from entering the inside of the vehicle through the through hole 101 of the mounting surface 100.

[0028] The thick portion 36 has a shape surrounding the convex portion 35, and goes around the periphery of the convex portion 35. The thick portion 36 is adjacent to the convex portion 35. The outer edge of the convex portion 35 and the inner edge of the thick portion 36 coincide. The groove portion 37 has a shape surrounding the thick portion 36, and goes around the periphery of the thick portion 36. The groove portion 37 is adjacent to the thick portion 36. The outer edge of the thick portion 36 and the inner edge of the groove portion 37 coincide. As described below, the groove portion 37 is used as a guide when cutting the waterproof portion when replacing the waterproof portion of the pad 30, i.e., the portion inside the groove portion 37.

[0029] The "enclosing shape" described in the explanation of the guide portion 34, the protrusion 35, the thick portion 36, and the groove portion 37 includes a shape in which a portion is cut out in addition to a shape in which the entire portion is enclosed.

[0030] As shown in FIG. 9, the protrusion 35 has a first surface 35a and a second surface 35b. The first surface 35a is the surface on the inner circumference side of the protrusion 35, and is the surface on the boss insertion hole 32 side from the apex (lower end) of the protrusion 35. The second surface 35b is the surface on the outer circumference side of the protrusion 35, and is the surface on the opposite side of the boss insertion hole 32 from the apex of the protrusion 35. The first surface 35a is an inclined surface that is inclined so as to move away from the boss insertion hole 32 as it goes downward. In other words, the surface on the inner circumference side of the protrusion 35 is inclined so as to widen as it goes downward. The inclination angle of the first surface 35a is, for example, about 30 degrees with respect to the vertical direction. The second surface 35b is a surface parallel to the vertical direction.

[0031] The groove portion 37 has a first surface 37a and a second surface 37b. The first surface 37a is the surface on the inner periphery of the groove portion 37, and is the surface on the boss insertion hole 32 side from the bottom (upper end) of the groove portion 37. The second surface 37b is the surface on the outer periphery of the groove portion 37, and is the surface on the opposite side of the boss insertion hole 32 from the bottom of the groove portion 37. The first surface 37a is an inclined surface that is inclined so as to move away from the boss insertion hole 32 as it goes upward. The second surface 37b is a surface parallel to the up-down direction. The groove portion 37 has a shape that narrows in width as it goes upward.

[0032] As shown in FIG. 9, the length, height, and width of each part are defined. The point where the first surface 35a of the protruding part 35 protrudes downward is defined as the starting point A (protruding starting point part). The depth (vertical length) of the groove part 37 based on the starting point A is defined as the groove depth L1, and the height (vertical length) of the protruding part 35 based on the starting point A is defined as the protruding part height L3. The thickness (vertical length) of the pad 30 at the starting point A part is defined as the A part thickness L5, and the difference in the vertical length of the thick part 36 from the A part thickness L5 is defined as the thickness difference L2. The height (vertical length) of the apex of the protruding part 35 from the lower surface of the thick part 36 is defined as the protruding part protruding length L4. The length connecting the inner edge part of the thick part 36 (the outer edge part of the protruding part 35) and the outer edge part of the thick part 36 (the outer edge part of the groove part 37) at the shortest distance is defined as the width W of the thick part 36. At this time, the width W of the thick portion 36 is equal to or greater than the protruding length L4 of the convex portion (W≧L4). The thickness of the pad 30 at the portion in contact with the outer periphery of the groove portion 37 is smaller than the thickness of the thick portion 36. However, the thickness of each portion can be appropriately changed depending on the usage environment.

[0033] 10 is a graph showing the results of a simulation of the relationship between the amount of compression and the reaction force of the pad 30 in each of the antenna device 1 and the comparative example. The amount of compression indicates the amount of change in the thickness of the pad 30 in the vertical direction when the antenna device 1 is pressed against the mounting surface 100. The reaction force indicates the force with which the pad 30 tries to push the antenna device 1 back upward. In this simulation, as an example, three patterns were analyzed in which the groove depth L1 of the groove portion 37 was fixed to 0.73 mm, the convex portion height L3 of the convex portion 35 was fixed to 1.5 mm, the thickness L5 of the portion A was fixed to 1.13 mm, and the thickness difference L2 of the thick portion 36 was fixed to 0.25 mm, 0.5 mm, and 0.75 mm. As comparative examples, a pattern in which the thickness difference L2 of the thick-walled portion 36 was set to 0 mm compared to the conditions of the embodiment (Comparative Example 1), and a pattern in which the thickness difference L2 of the thick-walled portion 36 was set to 0 mm compared to the conditions of the embodiment and the groove portion 37 was eliminated (L1 was set to 0 mm) (Comparative Example 2) were analyzed.

[0034] From the results of Comparative Examples 1 and 2, when the thickness difference L2 was 0 mm, the pattern in which the pad 30 had the groove 37 (Comparative Example 1) had a lower reaction force against the amount of compression compared to the pattern in which the pad 30 did not have the groove 37 (Comparative Example 2). On the other hand, when the thickness difference L2 of the thick portion 36 was provided, the reaction force was improved compared to Comparative Example 2, even when the groove 37 was provided. Furthermore, the reaction force increased as the thickness difference L2 of the thick portion 36 increased to 0.25 mm, 0.5 mm, and 0.75 mm. Thus, even when the groove 37 was provided, the reaction force obtained against the amount of compression of the pad 30 was larger by providing the thick portion 36 than when the groove 37 was not provided (Comparative Example 2), and the reaction force increased as the thickness difference L2 increased.

[0035] The greater the reaction force against the amount of compression of the pad 30, the greater the waterproofing power. On the other hand, if the reaction force is too large, it may cause deformation of the attachment surface 100. When commercializing the product, an appropriate thickness difference L2 is derived in consideration of the material (elasticity) of the pad 30, the required waterproofing power, the strength of the attachment surface 100, etc.

[0036] 11 to 14 show the flow of replacing the waterproof part of the antenna device 1. The waterproof part includes the part inside the groove part 37 of the pad 30, i.e., the convex part 35 and the thick part 36. The groove part 37 is used as a guide for cutting the waterproof part when replacing it. As shown in Fig. 11, the replacement is performed in a state where the bolt 59 and the washer 50 are removed from the state shown in Fig. 2, i.e., in a state where the antenna device 1 is removed from the mounting surface 100.

[0037] In the state shown in Fig. 11, the bottom of groove 37 is cut with a blade such as a knife, and a replacement portion (the portion from groove 37 to boss through hole 32) as a waterproof portion of pad 30 is cut out (first step) as shown in Fig. 12. Next, a replacement seal 70 is prepared as another waterproof part as shown in Fig. 13, and seal 70 is attached to the bottom surface of insulating base 20 with double-sided tape, adhesive, or the like as shown in Fig. 14 (second step).

[0038] The seal 70 has an enclosing shape with an outer dimension equal to or smaller than that of the groove portion 37. The seal 70 is sandwiched between the lower surface of the insulating base 20 and the upper surface of the mounting surface 100, and exhibits a waterproof function. The seal 70 is an elastic body made of elastomer or the like, and is preferably a urethane foam type. By using a urethane foam type, it is not necessary to prepare a replacement part that matches the mounting surface 100 of each vehicle.

[0039] This embodiment provides the following advantages.

[0040] (1) The pad 30 has a thick portion 36 between the protrusion 35 and the groove 37. Therefore, compared to a case where the thick portion 36 is not provided, the reaction force of the protrusion 35 of the pad 30 obtained when the antenna device 1 is attached to the attachment surface 100 is increased, and the waterproofing can be improved. As a result of the improved waterproofing, the options for the material of the pad 30 are increased, which is advantageous in terms of design.

[0041] (2) Since the pad 30 has the groove 37, the antenna device 1 can cut the pad 30 along the groove 37 and replace the part inside the groove 37 with the seal 70. Therefore, even if the waterproofing provided by the protrusion 35 of the pad 30 is reduced due to aging or the like, the waterproofing can be easily restored by replacing the part inside the groove 37 with a replacement part such as the seal 70 without replacing the entire pad 30. Since the groove 37 has a shape that narrows in width toward the top, when cutting the groove 37, the blade is guided toward the bottom of the groove 37, which improves workability. By providing the thick portion 36 as described above, waterproofing can be suitably ensured even when the groove 37 is provided.

[0042] (3) The width W of the thick-walled portion 36 is equal to or greater than the protruding length L4 of the protruding portion 35 relative to the lower surface of the thick-walled portion 36 (W≧L4). This reduces the risk of the protruding portion 35 being pressed against the upper surface of the attachment surface 100 and elastically deforming toward the opposite side to the boss insertion hole 32 entering the groove portion 37 (excessive deformation of the protruding portion 35), thereby reducing the risk of deterioration in waterproofing.

[0043] (Embodiment 2) 15 to 17 relate to an antenna device according to a second embodiment of the present invention. The following description will focus on the differences from the first embodiment. In the antenna device of this embodiment, the pad 30 of the antenna device 1 of the first embodiment is replaced with a pad 130 shown in Figs. 15 and 16. The pad 130 does not have the groove portion 37 of the pad 30, but has a thin portion 137 instead. The thin portion 137 goes around the periphery of the thick portion 36.

[0044] 17 is a graph showing the results of a simulation of the relationship between the compression amount and the reaction force of the pad 130 in each of the antenna device of the second embodiment and the comparative example. In this simulation, as an example, three patterns were analyzed in which the convex portion height L3 of the convex portion 35 was fixed to 1.5 mm, the part A thickness L5 at the starting point A was fixed to 1.13 mm, and the thickness difference L2 of the thick portion 36 was set to 0.25 mm, 0.5 mm, and 0.75 mm. Also, as a comparative example, a pattern in which the thickness difference L2 of the thick portion 36 was set to 0 mm in comparison with the conditions of the example was analyzed.

[0045] From the results of the comparative example and the example, the greater the thickness difference L2 of the thick portion 36 was, such as 0.25 mm, 0.5 mm, and 0.75 mm, the greater the reaction force obtained against the compression amount of the pad 130. As described in the first embodiment, the greater the reaction force against the compression amount of the pad 130, the higher the waterproofing force, but if the reaction force is too large, there is a possibility that the attachment surface 100 will be deformed. Therefore, when commercializing the product, an appropriate thickness difference L2 is derived in consideration of the material (elasticity) of the pad 130, the necessary waterproofing force, the strength of the attachment surface 100, and the like.

[0046] Other points of this embodiment are the same as those of embodiment 1. This embodiment provides the same effects as embodiment 1, except for the ease of replacing the waterproof portion.

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

[0048] In the first and second embodiments, the lower surface of the thick portion 36 is not limited to a plane perpendicular to the vertical direction, but may have a stepped shape or may be an inclined surface inclined with respect to a plane perpendicular to the vertical direction.

[0049] In the first embodiment, the cross-sectional shape of the groove 37 may be a rectangular groove. In this case, by thinning a part of the bottom of the rectangular groove, for example, the outer edge part, it becomes easier to cut along that part with a blade.

[0050] In the first embodiment, the attachment of the replacement seal as a separate waterproof part is not limited to adhesion with double-sided tape, etc. For example, as shown in Fig. 18 and Fig. 19, it may be secured with a claw or lightly pressed into a protrusion and a hole.

[0051] 18 shows an example in which a seal 170 having three claws 171 is hooked and locked into the through-hole 121 of the insulating base 20. For example, by providing the three claws 171 at positions that are rotationally asymmetric, it is possible to prevent incorrect assembly in the front, back, left, and right directions. The number of claws 171 can be changed as desired.

[0052] 19 shows an example in which a seal 270 having four protrusions 271 is lightly press-fitted into a hole 122 of an insulating base 120. For example, by making the arrangement pitch of the two protrusions 271 on the front side different from the arrangement pitch of the two protrusions 271 on the rear side, it is possible to prevent misassembly between the front, back, left and right. The number of protrusions 271 can be changed as desired.

[0053] The in-vehicle device of the present invention is not limited to the pole antenna exemplified in the embodiment, and may be another type of antenna such as a shark antenna (dolphin antenna).

[0054] In the embodiment, an antenna device 1 that is attached to the roof or bonnet of a vehicle has been described as an example of the on-vehicle device of the present invention. However, the on-vehicle device of the present invention may be installed in a location that requires waterproofing other than the roof or bonnet. In addition, the on-vehicle device of the present invention also includes devices that are installed in moving objects such as construction machines, agricultural machines, robots, and drones, and the present invention can be applied to these devices.

[0055] According to the present specification, there are provided an in-vehicle device and a method for replacing a waterproof portion of an in-vehicle device according to the following aspects.

[0056] (Aspect 1) An in-vehicle device comprising: a base; a mounting portion located below the base; and an elastic member having a hole through which at least a portion of the mounting portion passes, the elastic member having a convex portion surrounding the hole and protruding downward, a thick portion surrounding the convex portion, and a thin portion surrounding the thick portion.

[0057] According to the above-described aspect, the reaction force obtained when the vehicle-mounted device is attached is increased, and the waterproofing can be improved, compared to a case where there is no thick portion.

[0058] (Aspect 2) The thick portion is adjacent to the protrusion.

[0059] According to the above-mentioned aspect, the thick portion is adjacent to the protrusion, and thus the strength of the protrusion is increased, so that the effect of improving waterproofing is further enhanced.

[0060] (Aspect 3) The thin portion is a groove portion adjacent to the thick portion.

[0061] According to the above-mentioned aspect, the groove can be cut with a blade or the like, and the part inside the groove can be easily replaced.

[0062] (Aspect 4) The thickness of the elastic member at a portion in contact with an outer circumferential edge of the groove portion is smaller than the thickness of the thick portion.

[0063] According to the above-mentioned aspect, the thickness of the portion not related to waterproofing can be suppressed, and the amount of material used can be reduced.

[0064] (Aspect 5) A vehicle-mounted device, wherein a width of the thick portion is equal to or greater than a protruding length of the convex portion adjacent to the thick portion.

[0065] According to the above-described aspect, it is possible to reduce the risk of the protruding portion being deformed more than necessary, resulting in a decrease in waterproofness.

[0066] (Aspect 6) a thickness of the thick portion is greater than a thickness of a protrusion starting point portion of the convex portion on the hole side.

[0067] According to the above-mentioned aspect, the effect of increasing the reaction force of the protruding portion by the thick portion is enhanced, and waterproofing is improved.

[0068] (Aspect 7) A method for replacing a waterproof part of an on-board device, the on-board device comprising: a base; an attachment portion located below the base; and an elastic member having a hole through which at least a portion of the attachment portion passes, the elastic member having a waterproof part that surrounds the hole and includes a convex portion that protrudes downward and a thick-walled portion that surrounds the convex portion; and a groove portion that surrounds the waterproof part, the method comprising: a first step of cutting the waterproof part from the groove portion along the groove portion; and a second step of attaching another waterproof part to the underside of the base.

[0069] According to the above-described aspect, if the waterproofing provided by the convex portion decreases due to deterioration over time or the like, the waterproofing can be easily restored by replacing the part inside the groove portion with another sealing part, thereby improving convenience. [Explanation of symbols]

[0070] 1 Antenna device 10 Conductive Base 20 Insulating Base 30 Pads 35 Convex 36 Thick wall part 37 Groove 45 cases 59 Volts 70 Seals

Claims

1. With the base, A mounting portion located below the base; an elastic member having a hole through which at least a portion of the attachment portion passes; The elastic member is a protrusion surrounding the hole and protruding downward; A thick portion surrounding the protrusion; and a thin portion surrounding the thick portion.

2. The in-vehicle device according to claim 1 , wherein the thick portion is adjacent to the protruding portion.

3. The in-vehicle device according to claim 1 , wherein the thin portion is a groove adjacent to the thick portion.

4. The in-vehicle device according to claim 1 , wherein a width of the thick portion is equal to or greater than a protruding length of the convex portion adjacent to the thick portion.

5. The on-vehicle device according to claim 1 , wherein the thick portion has a thickness greater than a thickness of a protruding start portion of the convex portion on the hole side.

6. A method for replacing a waterproof portion of an in-vehicle device, comprising the steps of: The in-vehicle device includes: With the base, A mounting portion located below the base; an elastic member having a hole through which at least a portion of the attachment portion passes; The elastic member is A waterproof portion including a convex portion surrounding the hole and protruding downward, and a thick portion surrounding the convex portion; A groove portion surrounding the waterproof portion, A first step of cutting the waterproof portion from the groove along the groove; A second step of attaching another waterproof component to the underside of the base. A method for replacing a waterproof part of an in-vehicle device.

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