JP3866664B2 - Antenna device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an antenna device for wireless communication such as a vehicle.
[0002]
[Prior art]
For vehicles such as automobiles, navigation devices that receive radio waves transmitted from artificial satellites and the like to determine the current position of the vehicle, and automatic toll collection systems that automatically pay tolls for toll roads by wireless communication (hereinafter referred to as “toll collection”) The number of devices equipped with ETC devices) is increasing.
[0003]
Such a navigation device or ETC device includes an antenna device for wirelessly transmitting / receiving information to / from a transmission / reception antenna installed in an artificial satellite or a toll gate on a toll road (for example, related to the navigation device). As a thing, refer patent document 1). An antenna device (hereinafter simply referred to as an antenna device) used in a navigation device or an ETC device is configured by housing a substrate provided with an antenna element in a flat case.
[0004]
And as an antenna device, it has been used that the antenna device is disposed at a good position in the vehicle interior in consideration of weather resistance (waterproof structure, drop-off prevention structure, etc.). Specifically, the antenna device is mounted on the inner surface of the windshield glass, the instrument panel, or the rear tray.
[0005]
On the other hand, many of the above-described navigation devices and ETC devices are mounted by a user after purchase of a vehicle (so-called retrofit), and in this case, an antenna device is also retrofitted. Such an antenna device for retrofitting is mainly attached to the inner surface of the windshield glass, and the surface on the attachment (glass surface) side in the flat case is a communication surface (antenna). The surface on the vehicle interior side of the case is a design surface. As a result, good communication can be ensured and a good appearance can be obtained even with the retrofit antenna device.
[0006]
[Patent Document 1]
JP-A-8-162843
[0007]
[Problems to be solved by the invention]
By the way, it has been desired that the retrofit antenna device can be mounted not only on the inner surface of the windshield glass but also on the instrument panel or the rear tray. That is, it is desired to be able to select the installation position of the antenna device according to the type of vehicle, user preference, and the like.
[0008]
However, in the conventional antenna device as described above, the communication surface side is the attachment surface, and the opposite side to the communication surface is the design surface, so this is attached with the communication surface facing the instrument panel. If installed, there is a problem that communication with the outside is not performed well.
[0009]
Therefore, the communication surface side of the case constituting the outer shell of the antenna device is formed so as to be able to be adhered to the inner surface of the wind seal glass, and the surface opposite to the communication surface is formed to be capable of being adhered to an instrument panel or the like. However, in this case, the external shape (degree of freedom of design) is restricted. That is, it is difficult to form a good design surface on the case, and the appearance after the antenna device is installed is deteriorated.
[0010]
In view of the above facts, an object of the present invention is to obtain an antenna device capable of ensuring communication and improving appearance regardless of the mounting direction.
[0011]
[Means for Solving the Problems]
  In order to achieve the above object, an antenna device according to a first aspect of the present invention is an antenna device that is attached to a predetermined attachment portion, and is formed in a flat shape and either one of the front and back sides.Flat surface sideAn antenna main body capable of selectively taking an arrangement state in which the communication side surface is directed to the attachment portion and an arrangement state in which a surface opposite to the communication side is directed to the attachment portion;By having a top plate and a peripheral wall erected from the peripheral edge of the top plate, by allowing the antenna body to enter the inside of the peripheral wall so that the flat surface of the antenna body faces the top plate,And a cover member that covers the antenna body from the side opposite to the mounting portion.
[0012]
The antenna device according to claim 1, wherein the antenna body is arranged with the surface of the communication side (front or back) facing the attachment portion, and the cover member is the communication body in which the antenna body is opposite to the attachment portion. It is possible to take a first attachment state in which it is covered from the opposite side to the attachment portion and attached to the attachment portion. In this antenna device, the antenna body is disposed with the surface opposite to the communication side facing the attachment portion, and the cover member covers the antenna body from the communication side opposite to the attachment portion. The 2nd attachment state attached to this attachment part can be taken.
[0013]
That is, even if the antenna device is attached to the attachment portion with the front and back surfaces of the flat antenna body facing the attachment portion, from the side opposite to the attachment portion (for example, the side facing the vehicle interior) across the antenna body The cover member covers the antenna main body, and it is possible to obtain a good appearance by the cover member while ensuring the communication property with the communication side facing in a desired direction.
[0014]
As described above, in the antenna device according to the first aspect, it is possible to ensure communication and improve the appearance regardless of the mounting direction.
[0015]
The antenna device may be, for example, a cover member or an antenna main body directly attached to the attachment portion, or may be attached to the attachment portion via an attachment member fixed to the cover member or the antenna main body.
[0016]
The antenna device according to a second aspect of the present invention is the antenna device according to the first aspect, wherein the cover member is held by the antenna main body attached to the attachment portion, or the antenna main body is held and the attachment is made. It is attached to the part.
[0017]
In the antenna device according to claim 2, the cover member is held by the antenna body attached directly or indirectly to the attachment portion and fixed to the attachment portion, or directly or while holding the antenna body. The antenna body is fixed to the attachment portion by being indirectly attached to the attachment portion. That is, it is not necessary to attach the antenna main body and the cover member independently to the mounting portion, or the antenna main body and the cover member can be handled as an integral assembly before mounting to the mounting portion, thereby improving the mounting property. .
[0018]
  The cover member includes an antenna main body (first mounting state) facing the communication side surface toward the mounting portion, and an antenna main body (second mounting state) facing the mounting portion facing away from the communication side. It is possible to hold both, and good mounting properties are maintained regardless of the mounting direction of the antenna body.
  The antenna device according to claim 3 is the antenna device according to claim 2, wherein the cover member has a plurality of engagements projecting inward from an opening end portion of the peripheral wall opposite to the top plate. A claw is provided, and the antenna body is engaged with the engagement claw of the cover member to hold the cover member on the antenna body or to hold the antenna body on the cover member. A plurality of joint recesses are provided on each of one side and the other side in the flat direction.
[0019]
  In order to achieve the above object, the claims4The antenna device according to the described invention is formed in a flat shape and either one of the front and back sidesFlatThe antenna body whose surface is the communication surface and the outer surface is the design surfaceA top plate and a peripheral wall erected from the periphery of the top plateFirst cover part,as well as
The opening end of the peripheral wall of the first cover portion is closed on the side opposite to the top plate.A second cover part whose outer surface is a mounting surface;The antenna body is placed so that the flat surface of the antenna body faces the top plate.Between the first cover part and the second cover partFit inAnd a case that is attached to a predetermined attachment portion on the attachment surface, wherein the case includes a housing state of the antenna body with the communication surface facing the first cover portion, and the communication surface is the first portion. 2 It is characterized in that the antenna main body facing the cover portion can be selectively taken.
[0020]
  Claim4In the described antenna device, an antenna body whose front or back surface is a communication surface is accommodated between the first cover portion and the second cover portion of the case, and is the outer surface of the second cover portion of the case. It is attached to a predetermined attachment portion on the attachment surface. The design surface on the opposite side of the antenna body with respect to the mounting surface attached to the mounting portion can be viewed by the user.
[0021]
Here, the first housing state of the antenna body with the communication surface facing the first cover portion (inner surface thereof) and the second housing state of the antenna body with the communication surface facing the second cover portion (inner surface thereof). Therefore, the communication surface of the antenna body can be directed in a desired direction regardless of the mounting position of the case. For this reason, in this antenna device, it is possible to obtain a good appearance by the design surface of the case while ensuring communication.
[0022]
  Thus, the claim4With the described antenna device, it is possible to ensure communication and improve the appearance regardless of the mounting direction.
[0023]
Moreover, since a case accommodates an antenna main body between a 1st cover part and a 2nd cover part, a 1st cover part or a 2nd cover part is located in the outer side of the communication surface of an antenna main body. By adjusting characteristics such as radio wave permeability and relative permittivity of the first cover part and the second cover part, it is possible to stabilize the communication performance regardless of the accommodation direction of the flat antenna body.
[0024]
The case may be formed by integrally forming the first cover portion and the second cover portion, and the first cover portion (including member) and the second cover portion (including member) are joined to each other. May be configured.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
An antenna device 10 according to a first embodiment of the present invention will be described with reference to FIGS. For convenience of explanation, the arrow A side appropriately shown in each drawing is a front side.
[0026]
FIG. 1 shows the antenna device 10 in an exploded perspective view. As shown in this figure, the antenna device 10 includes an antenna main body 12 and an upper case 14 as a cover member attached to the antenna main body 12.
[0027]
The antenna main body 12 includes a main body case 16 that constitutes an outline thereof, and the main body case 16 is formed in a flat shape. As shown in FIG. 2, the main body case 16 accommodates the substrate 20 to which the antenna chip 18 is fixed.
[0028]
Specifically, the main body case 16 includes a lower case 22 formed in a flat container shape with one end opened, and an inner case 24 that fits into the open end of the lower case 22 and closes it. The lower case 22 is formed in a hexagonal shape such that the bottom plate 26 is cut out from the top of a pentagon in plan view, and a peripheral wall 28 is erected along the outer edge of the bottom plate 26.
[0029]
The peripheral wall 28 includes a pair of side walls 28A that face each other, a front wall 28B that connects the front ends of the side walls 28A, a back wall 28C that is parallel to the front wall 28B and shorter than the front wall 28B, and other side walls 28A. It is comprised by the inclination wall 28D which connects an edge part and the different edge part of the back wall 28C, respectively. The lower case 22 connects the longitudinal center of the front wall 28B and the longitudinal center of the back wall 28C and is formed symmetrically with respect to an imaginary line parallel to each side wall 28A.
[0030]
Among the peripheral walls 28, the pair of side walls 28 </ b> A are symmetrically positioned with respect to the imaginary line, and the engagement recess 30 </ b> A opened at the upper end and the engagement recess opened notch to the side edge of the bottom plate 26. 30B are provided. That is, each of the engagement recesses 30A and 30B is formed by cutting the peripheral wall 28 over the entire plate thickness, and the position (distance) with respect to the front wall 28B is constant.
[0031]
In addition, an engaging recess 32A that opens to the upper end and an engaging recess 32B that opens to the front edge of the bottom plate 26 and open downward are provided at the center in the longitudinal direction of the front wall 28B. That is, the engagement recesses 32A and 32B are formed by cutting the peripheral wall 28 over the entire plate thickness, and are disposed symmetrically across the virtual line.
[0032]
On the other hand, a notch 34 that opens upward and reaches the vicinity of the bottom plate 26 is provided at the longitudinal center of the back wall 28C. The notch 34 is also formed by notching the peripheral wall 28 over the entire plate thickness, and is disposed symmetrically across the imaginary line.
[0033]
Further, an engaging claw 36 is projected from the inner surface near the upper end in the longitudinal center of the front wall 28B. On the other hand, engaging projections 38 project from two locations on the inner surface of the back wall 28C across the notch 34.
[0034]
The inner case 24 includes a flat plate portion 40 and a peripheral wall 42 erected along the outer edge of the flat plate portion 40. The outer edge shape of the peripheral wall 42 corresponds to the inner edge shape of the peripheral wall 28 of the lower case 22. Further, an engagement hole 44 into which the engagement claw 36 enters and can be engaged is provided at a position corresponding to the engagement claw 36 of the lower case 22 in the peripheral wall 42.
[0035]
As shown in FIG. 3, the inner case 24 is fitted into the opening end portion of the lower case 22, and the lower end surface of the rear end portion of the peripheral wall 42 abuts (engages) with the engaging convex portion 38 and is engaged. The engaging claw 36 is inserted into the hole 44 and is fixedly held by the lower case 22. In this state, the outer surface of the flat plate portion 40 is configured not to protrude (substantially flush with) the upper end surface of the peripheral wall 28.
[0036]
Then, as described above, the substrate 20 to which the antenna chip 18 is fixed is accommodated in the main body case 16 configured by fixing the inner case 24 to the lower case 22. The antenna chip 18 is fixed to the upper surface of the substrate 20 and is disposed on the flat plate portion 40 side with respect to the substrate 20.
[0037]
The board 20 is connected with a cable 46 containing wiring electrically connected to the antenna chip 18, and the cable 46 is led out of the main body case 16 through the notch 34. The wiring of the cable 46 is configured to be connected to an automatic toll collection system (ETC device) that is mounted on a vehicle such as an automobile and automatically pays a toll on a toll road by wireless communication.
[0038]
That is, in the first embodiment, the antenna device 10 (antenna chip 18) is an antenna device for an ETC device, and is wirelessly transmitted to and received from a transmission / reception antenna installed at a toll gate on a toll road. Information for fee settlement is sent and received. For this reason, the substrate 20 is provided with transmission and reception amplification circuits, filter circuits, and the like (both not shown).
[0039]
  And in the antenna main body 12, in order to ensure favorable communication, the said transmission / reception electromagnetic wave is the flat plate part 40 side (antenna with respect to the board | substrate 20).ChiThe vehicle is arranged at an appropriate position of the vehicle so as to be derived from or introduced into the vehicle 18 side), which will be described later together with the operation of the first embodiment. The flat plate portion 40 is provided with a mark M indicating that the flat plate portion 40 side is a communication surface.
[0040]
An upper case 14 is attached to the antenna body 12 described above. 4 and 5, the upper case 14 has a top plate 48 and a peripheral wall 50 erected along the outer edge of the top plate 48. As a whole, the upper case 14 has a flat container shape with one end opened. Is formed. The outer surface of the top plate 48 is a design surface, and various curved surface shapes can be adopted. In the first embodiment, the rear portion has a flat shape with a slight slant.
[0041]
The peripheral wall 50 has an inner edge shape corresponding to the outer edge shape of the peripheral wall 28 of the lower case 22. That is, the peripheral wall 50 corresponds to the pair of side walls 50A corresponding to the pair of side walls 28A, the front wall 50B corresponding to the front wall 28B, the back wall 50C corresponding to the back wall 28C, and the inclined walls 28D, respectively. It is comprised with the inclination wall 50D.
[0042]
An engagement claw 52 is provided near the lower end (opening end of the upper case 14) of the pair of side walls 50A corresponding to the engagement recess 30A or the engagement recess 30B. Further, an engaging claw 54 is provided in the vicinity of the lower end of the front wall 50B corresponding to the engaging recess 32A or the engaging recess 32B. Further, a notch portion 56 through which the cable 46 can pass is provided at a position corresponding to the notch portion 34 in the back wall 50C, and a substantially semi-cylindrical shape is directed outward from the edge of the notch portion 56. The cable cover 58 is projected.
[0043]
The upper case 14 described above is attached to the antenna body 12. In the first embodiment, the upper case 14 can be detached from the antenna body 12 (that is, detachable). The upper case 14 is attached to the antenna body 12 and can selectively take a state where the top plate 48 covers the outer surface of the bottom plate 26 and a state where the top plate 48 covers the outer surface of the flat plate portion 40. It is like that.
[0044]
Specifically, when the upper case 14 is attached to the antenna body 12 with the antenna body 12 inserted inside and the engagement claws 52 and 54 engaged with the engagement recesses 30B and 32B, respectively, The plate 48 is configured to cover the outer surface of the flat plate portion 40. On the other hand, when the upper case 14 is attached to the antenna body 12 with the antenna body 12 inserted inside and the engagement claws 52 and 54 engaged with the engagement recesses 30A and 32A, respectively, the top plate 48 is In this configuration, the outer surface of the bottom plate 26 is covered. Further, the upper case 14 is configured such that the peripheral wall 50 covers the peripheral wall 28 in any of the above attachment states.
[0045]
The antenna device 10 described above is mounted on the vehicle as described above and constitutes a part of the ETC device, and is a so-called retrofit that is installed by the user after purchasing the vehicle together with the ETC device. The antenna device 10 is shipped, sold, etc. with the antenna body 12 and the upper case 14 separated.
[0046]
Next, the operation of the first embodiment will be described.
[0047]
The antenna device 10 having the above-described configuration is attached to a vehicle interior that does not require weather resistance and constitutes a part of the ETC device. The antenna device 10 has a good communication state according to the type of vehicle in the passenger compartment, and is attached to a site according to the user's preference. Hereinafter, the example which attaches the antenna apparatus 10 to the inner surface of the windshield glass G of a vehicle and the upper surface of the instrument panel I is demonstrated.
[0048]
As shown in FIG. 6A, when the antenna device 10 is attached to the inner surface of the windshield glass G, the antenna body 12 is windshielded at the flat plate portion 40 so that the flat plate portion 40 of the inner case 24 faces the outside of the vehicle. Attached (attached) to the inner surface of the glass G with double-sided tape T or the like. At this time, the mark M provided on the flat plate portion 40 is used as a mark.
[0049]
From this state, when the upper case 14 is externally fitted to the antenna body 12 and the engaging claws 52 and 54 of the upper case 14 enter and engage with the engaging recesses 30A and 32A of the main body case 16, the upper case 14 is It is fixed to the antenna body 12, and the mounting of the antenna device 10 is completed. The antenna device 10 may be attached to the inner surface of the windshield glass G with the upper case 14 attached to the antenna body 12 so that the flat plate portion 40 is exposed.
[0050]
As shown in FIG. 6B, when the antenna device 10 is attached to the upper surface of the instrument panel I, the bottom plate 26 opposite to the flat plate portion 40 is arranged so that the flat plate portion 40 of the inner case 24 faces the outside of the vehicle. The antenna body 12 is attached (attached) to the upper surface of the instrument panel I with a double-sided tape T or the like. At this time, the mark M provided on the flat plate portion 40 is used as a mark.
[0051]
From this state, when the upper case 14 is externally fitted to the antenna body 12 and the engaging claws 52 and 54 of the upper case 14 enter and engage with the engaging recesses 30B and 32B of the main body case 16, the upper case 14 is It is fixed to the antenna body 12, and the mounting of the antenna device 10 is completed. The antenna device 10 may be attached to the inner surface of the windshield glass G with the upper case 14 attached to the antenna body 12 so that the bottom plate 26 is exposed.
[0052]
As described above, in the antenna device 10, the antenna is mounted in any of the attachment state to the windshield glass G in which the attachment surface is the flat plate portion 40 and the attachment state to the instrument panel I in which the attachment surface is the bottom plate 26. Since the side opposite to the mounting surface of the main body 12 is covered with the upper case 14, the upper case 14 is secured while ensuring the communicability with the flat plate portion 40 serving as the communication surface facing the outside of the passenger compartment as the radio wave transmission / reception direction. Therefore, a good appearance can be obtained.
[0053]
That is, in the antenna device 10, the upper case 14 having a good appearance is provided with the top plate 48 whose design surface is visible from the vehicle occupant regardless of the attachment site. For this reason, in the antenna device 10, there is no design (design) restriction that becomes a problem when the antenna body 12 can be attached to either the windshield glass G or the instrument panel I.
[0054]
Thus, in the antenna device 10 according to the first embodiment, it is possible to ensure communication and improve the appearance regardless of the mounting direction.
[0055]
In the antenna device 10, since the upper case 14 is fixedly attached to the antenna body 12, only the antenna body 12 is attached to the windshield glass G or the windshield glass G or the instrument panel I without attaching the upper case 14 to the windshield glass G or the instrument panel I. It is sufficient if it is attached to the instrument panel I, and the attachment property to the vehicle body is good while maintaining the function of good communication and appearance.
[0056]
Further, by attaching the upper case 14 to the antenna body 12 before the attachment to the windshield glass G or the instrument panel I, it is also possible to handle them as an integral assembly. By handling in this way, when the antenna device 10 is attached to a narrow gap between the windshield glass G and the instrument panel I, it is prevented that the attachment of the upper case 14 to the antenna body 12 is difficult or impossible. .
[0057]
Next, an antenna device 60 according to a second embodiment of the present invention will be described with reference to FIGS. Note that parts and portions that are basically the same as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.
[0058]
As shown in FIG. 8, the antenna device 60 includes an antenna body 12 and an outer case 62 as a case for housing the antenna body 12. The outer case 62 includes an upper case 64 formed in a flat container shape with one end opened, and an under cover 66 as a second cover portion that fits and closes the opening end of the upper case 64. Yes.
[0059]
The upper case 64 is formed in a shape similar to that of the upper case 14 in the first embodiment and includes a top plate 48, and a peripheral wall 68 erected along the outer edge of the top plate 48 is a peripheral wall 50. Is slightly higher (by an amount corresponding to the thickness of the under cover 66). The upper case 64 or the top plate 48 corresponds to the first cover portion in the present invention. In other words, the top plate 48 whose outer surface is a design surface or the upper case 64 having the top plate 48 with the outer surface of the peripheral wall 68 also being a design surface corresponds to the first cover portion.
[0060]
Further, the engaging claw 52, 54 is not provided on the peripheral wall 68, and the engaging claw 70 projects inwardly from the longitudinal center of the front wall 68A. Further, as shown in FIGS. 8A and 8B, a contact rib 72 is erected from the inner surface of the top plate 48.
[0061]
On the other hand, the under cover 66 is formed in a flat plate shape corresponding to the inner edge shape of the peripheral wall 68 (the shape of the main body case 16 in a plan view). A notch 74 is provided by cutting out the lower part in the thickness direction. The under cover 66 is fitted into the opening end of the upper case 64 and accommodates the antenna body 12 between the upper case 64 (closes the opening of the upper case 64 housing the antenna body 12). It is.
[0062]
In this state, the under cover 66 abuts on the flat plate portion 40 or the bottom plate 26 of the antenna body 12 (main body case 16) in which the bottom plate 26 or the flat plate portion 40 abuts on the abutment rib 72, and the upper portion of the under cover 66 is not connected to the notch 74. The engaging claw 70 of the case 64 is engaged, and is fixed to the upper case 64 so as not to drop off. In other words, the outer case 62 has a configuration in which the antenna main body 12 is fixed and held in the state where the under cover 66 is attached to the upper case 64. For this reason, in the second embodiment, the antenna main body 12 may not be provided with the engagement recesses 30A, 30B, 32A, and 32B. In the second embodiment, the under cover 66 can be attached to and detached from the upper case 64.
[0063]
The outer case 62 described above has an outer surface of the under cover 66 as an attachment surface, and the attachment surface is attached to the windshield glass G or the instrument panel I by a double-sided tape T or the like (see FIG. 8). With the above configuration, as shown in FIG. 8A, the outer case 62 has the housing and holding state of the antenna body 12 in which the flat plate portion 40 that is the communication surface is arranged on the under cover 66 side, and the flat plate portion 40. The antenna body 12 disposed on the top plate 48 side can be selectively held and held.
[0064]
For this reason, the antenna device 60 according to the second embodiment can achieve the same effect as the antenna device according to the first embodiment. That is, in the antenna device 60 according to the second embodiment, it is possible to ensure communication and improve the appearance regardless of the mounting direction.
[0065]
More specifically, the mounting state to the windshield glass G in which the flat plate portion 40 is disposed on the under cover 66 side whose outer surface is the mounting surface, and the mounting to the instrument panel I in which the bottom plate 26 is disposed on the under cover 66 side. In any case, the under cover 66 having the mounting surface is covered with the upper case 64 on the opposite side of the antenna body 12, so that the flat plate portion 40, which is the communication surface, is placed outside the vehicle compartment in the radio wave transmission / reception direction. It is possible to obtain a good appearance by the upper case 64 (outer case 62) having the top plate 48 whose outer surface is a design surface while ensuring communication in the facing direction. That is, in the antenna device 60, regardless of the attachment site, the portion visible to the vehicle occupant has the top plate 48 that is a design surface and becomes an upper case 64 with good appearance. For this reason, in the antenna device 60, there is no design (design) restriction which becomes a problem when the antenna body 12 can be attached to either the windshield glass G or the instrument panel I.
[0066]
Further, in the antenna device 60, since the antenna body 12 is fixedly accommodated and held in the outer case 62, only the under cover 66 is windshielded without attaching the antenna body 12 to the windshield glass G or the instrument panel I. It is sufficient if it is attached to the glass G or the instrument panel I, and the attachment property to the vehicle body is good while maintaining the function of good communication and appearance. In particular, before the antenna body 12 is accommodated and held in the outer case 62 before being attached to the windshield glass G or the instrument panel I, the antenna device 60 is handled as an integral assembly, so that the windshield glass G and the instrument panel are handled. It is easy to attach to narrow gaps with I.
[0067]
Furthermore, in the antenna device 60 according to the second embodiment, the outer case 62 includes an upper case 64 and an under cover 66, and the antenna main body 12 is accommodated between them. The top plate 48 or the under cover 66 is located outside the flat plate portion 40. By adjusting characteristics such as radio wave permeability and relative permittivity of the top plate 48 or the under cover 66, it is possible to stabilize the communication performance regardless of the mounting direction (attachment part) of the flat antenna body 12. Become.
[0068]
In addition, since the outer surface of the under cover 66 that can be attached to and detached from the upper case 64 serves as an attachment surface to the windshield glass G or the instrument panel I, in other words, the antenna body 12 or the upper case 64 is attached to the windshield glass G or Since the antenna main body 12 cannot be directly attached to the instrument panel I, even if the antenna main body 12 is accommodated in the outer case 62 in the opposite direction, the upper case 64 is removed from the under cover 66 and the direction of the antenna main body 12 is changed. It is easy to correct.
[0069]
In the second embodiment, the outer case 62 has an upper case 64 and an under cover 66 formed by, for example, notching a part of the peripheral wall 68 and providing an opening through which the antenna body 12 can be inserted (detached). May be formed integrally (for example, by integral molding of resin).
[0070]
In each of the above embodiments, the antenna body 12 is preferably held or held with respect to the upper case 14 or the outer case 62. However, the present invention is not limited to this, and for example, the antenna body 12 and the upper case The case 14 may be independently attached to the windshield glass G or the like.
[0071]
Further, the present invention suffices if the antenna body 12 is covered with the upper case 14 or the outer case 62 on the side opposite to the mounting portion (occupant side) regardless of the orientation with respect to the mounting portion. Needless to say, the case 14 and the outer case 62 are not limited by the shape or the like in the above embodiments.
[0072]
Further, in each of the embodiments described above, the antenna devices 10 and 60 are so-called retrofits, but the present invention is not limited to this, and the antenna devices 10 and 60 are mounted on the production (assembly) site of an automobile or the like. It may be. In this case, the parts can be shared regardless of the mounting site of the antenna device 10 and the like, and the productivity can be improved by mass production, and the parts can be easily managed, and the cost can be reduced.
[0073]
Furthermore, in the above-described embodiment, an example in which the antenna devices 10 and 60 constitute a part of the ETC device has been shown. However, the present invention is not limited to this, and the antenna device 10 and the like may be a navigation device or the like, a vehicle The present invention may be applied to any device that requires communication (at least one of transmission and reception) with the outside. Moreover, it cannot be overemphasized that the antenna apparatuses 10 and 60 are not limited to the attachment part windshield glass G and the instrument panel I. FIG.
[0074]
【The invention's effect】
As described above, the antenna device according to the present invention has an excellent effect of ensuring communication and improving appearance regardless of the mounting direction.
[Brief description of the drawings]
FIG. 1 is a schematic exploded perspective view of an antenna device according to a first embodiment of the present invention.
FIG. 2 is an exploded perspective view of an antenna main body constituting the antenna device according to the first embodiment of the present invention.
FIG. 3 is a cross-sectional view of an antenna body constituting the antenna device according to the first embodiment of the present invention.
FIG. 4 is a perspective view of the upper case constituting the antenna device according to the first embodiment of the present invention as viewed from the open end side.
5A and 5B are diagrams showing an upper case constituting the antenna device according to the first embodiment of the present invention, where FIG. 5A is a plan view, FIG. 5B is a side view, and FIG. 5C is a bottom view; (D) is sectional drawing which followed the 5D-5D line | wire of FIG. 5 (A).
6A and 6B are views showing the antenna device according to the first embodiment of the present invention, in which FIG. 6A is a cross-sectional view showing a state of attachment to a windshield glass, and FIG. 6B is attachment to an instrument panel; It is sectional drawing which shows a state.
FIG. 7 is a schematic exploded perspective view of an antenna device according to a second embodiment of the present invention.
FIGS. 8A and 8B are diagrams showing an antenna device according to a second embodiment of the present invention, where FIG. 8A is a cross-sectional view showing a state of attachment to a windshield glass, and FIG. 8B is attachment to an instrument panel; It is sectional drawing which shows a state.
[Explanation of symbols]
10 Antenna device
12 Antenna body
14 Upper case (cover member)
48 Top plate (first cover)
60 Antenna device
62 Outer case (case)
64 Upper case (first cover part)
66 Undercover (second cover)

Claims (4)

An antenna device attached to a predetermined attachment part,
It is formed in a flat shape, and either one of the front and back flat surfaces is the communication side, the arrangement state in which the surface on the communication side faces the attachment portion, and the surface opposite to the communication side faces the attachment portion. An antenna body capable of selectively taking the arrangement state;
The antenna has a top plate and a peripheral wall erected from the periphery of the top plate, and the antenna main body enters the inside of the peripheral wall so that a flat surface of the antenna main body faces the top plate. A cover member that covers the main body from the side opposite to the mounting portion;
An antenna device comprising:   The antenna device according to claim 1, wherein the cover member is held by the antenna body attached to the attachment portion, or attached to the attachment portion while holding the antenna body. The cover member is provided with a plurality of engaging claws projecting inwardly from the opening end of the peripheral wall opposite to the top plate,
The antenna main body has a plurality of engaging recesses that are engaged with the engaging claws of the cover member to hold the cover member on the antenna main body or hold the antenna main body on the cover member in a flat direction. The antenna device according to claim 2 , wherein a plurality of antenna devices are provided on each of the one side and the other side . An antenna body that is formed in a flat shape and either one of the front and back flat surfaces is a communication surface;
A first cover portion having a top plate whose outer surface is a design surface and a peripheral wall erected from the peripheral edge of the top plate, and an open end is closed on the opposite side of the peripheral wall of the first cover portion from the top plate A second cover portion whose outer surface is a mounting surface, and the antenna body is disposed between the first cover portion and the second cover portion so that the flat surface of the antenna body faces the top plate. And a case attached to a predetermined attachment portion on the attachment surface,
And the case can selectively take a housing state of the antenna body with the communication surface facing the first cover portion and a housing state of the antenna body with the communication surface facing the second cover portion. An antenna device characterized by that.

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