JP6941430B2 - Method of forming a holder in the in-vehicle antenna device, the power supply terminal of the in-vehicle antenna device, and the power supply terminal of the in-vehicle antenna device - Google Patents

Description

The present invention relates to an in-vehicle antenna device and the like.

Conventionally, as in Patent Document 1, an in-vehicle antenna device has been proposed.

JP-A-2007-104142

However, the ground in the in-vehicle antenna device needs to be attached separately from the power feeding terminal portion like the ground piece of Patent Document 1.

Therefore, an object of the present invention is to provide an in-vehicle antenna device or the like that can be easily grounded.

The vehicle-mounted antenna device according to the present invention includes an element portion provided on glass, a substrate including an amplifier for amplifying a signal obtained by the element portion, a storage portion for accommodating the substrate, and a glass rather than a substrate in the storage portion. a ground plate comprising a surface mounted on the side near the first connecting portion to electrically connect the substrate and the ground plate, and a second connecting portion for electrically connecting the conductive terminals of the substrate and the element section, a and a feeding terminal portion having. At least one of the first connection portion and the second connection portion has a spring property in the arrangement direction of the substrate and the ground plate.

A ground plate that functions as a ground for the antenna element is attached to the side of the power feeding terminal portion that houses the substrate closer to the glass than the substrate.
By attaching the power supply terminal to the glass, the ground (earth plate) of the antenna element can also be attached to the glass, so grounding can be done easily.

The element portion does not require a region for arranging a metal material (metal film, conductive paint) or the like for functioning as a ground, only an region for arranging the conductive portion and the conductive terminal, and can be formed in a simple shape. ..
Further, since the ground plate is arranged between the substrate and the glass, it is easier to secure the performance as an earth as compared with the form in which the member corresponding to the earth plate is arranged adjacent to the same plane as the substrate. Moreover, the dimension of the power feeding terminal portion (particularly the dimension in the longitudinal direction) can be reduced.

Preferably, the longitudinal direction of the housing portion has a dimension of 1/8 or less of the wavelength of the radio wave received by the in-vehicle antenna device, and the total length of the conductor pattern formed in the element portion has a dimension of 1/4 or more of the wavelength. Has.

There is a limit to the size of the power supply terminal, and especially when the length in the longitudinal direction cannot be sufficiently secured, the total length of the conductor pattern of the ground plate is shortened, and the total length of the conductor pattern of the ground plate is long compared to the case where the total length is long. , It is possible that the resonance frequency shifts to the high range, but the overall length of the conductor pattern of the conductive part in the element part formed in a simple shape such as a band is made longer than usual, the resonance frequency is shifted to the low range, and the vehicle is mounted. The desired reception frequency can be obtained for the entire antenna device.

Further, preferably, the conductor pattern of the ground plate is C-shaped, L-shaped, U-shaped, J-shaped, or any of a meander-shaped, spiral-shaped, and O-shaped having a long side extending in the longitudinal direction of the storage portion. It is formed into a crab.

More preferably, the conductor pattern of the ground plate has a surface parallel to the substrate and a surface perpendicular to the surface containing the substrate.

By forming the conductor pattern of the ground plate on the surface perpendicular to the surface including the substrate, it is possible to increase the overall length of the conductor pattern of the earth plate without increasing the longitudinal dimension of the power feeding terminal portion. ..

Further, preferably, the conductor pattern of the ground plate is formed in a C-shape, an L-shape, a U-shape, a J-shape, a meander shape having a long side extending in the longitudinal direction of the storage portion, or a spiral shape. , The first connecting portion is connected to the end portion of the conductor pattern forming the ground plate.

Also, preferably, the ground plate is integrally formed with at least a part of the storage portion.

The holder is formed with the material of the holder in close contact with the ground plate, so that the holder and the ground plate do not easily come off even if deterioration occurs over time, and the process of attaching the ground plate to the holder can be simplified.

Further, preferably, the storage portion has a holder on the side closer to the glass than the substrate in the storage portion and a case attached to the holder by engagement, and the substrate supplies power to the amplifier and the element portion is used. A cable for outputting the obtained signal is connected, a non-conductive plate-shaped member is provided between the substrate and the holder, and the substrate is housed between the case and the plate-shaped member and removed from the holder. It is possible and the ground plate is placed between the plate-like member and the holder.

The case is attached to the holder by the engagement between the case and the holder, but the case can be removed from the holder by releasing the engaged state.
If a problem occurs with the members that make up the in-vehicle antenna device, such as the board of the power supply terminal or the element, the board contained in the case can be repaired or replaced, or the element can be replaced by removing the case from the holder. You can do it.

The method according to the present invention is attached to a substrate including an amplifier for amplifying a signal obtained by an element portion provided on a glass, a storage portion for accommodating the substrate, and a holder in the storage portion on a side closer to the glass than the substrate. possess a ground plate including the surface, and a first connecting portion for electrically connecting the substrate and the ground plate, a second connecting portion for electrically connecting the conductive terminals of the substrate and the element portion, the first connecting portion A method of forming a holder in a power feeding terminal portion in which at least one of the second connection portion and the second connection portion has a spring property in the arrangement direction of the substrate and the ground plate, and an engaging protrusion is provided on the side of the ground plate facing the holder. It includes a first step of placing the earth plate on the mold and a second step of pouring the molten holder material into the mold to form the holder.

The power supply terminal portion of the vehicle-mounted antenna device according to the present invention is closer to the glass than the substrate including the amplifier for amplifying the signal obtained by the element portion provided on the glass, the storage portion for accommodating the substrate, and the substrate in the storage portion. comprising a ground plate comprising a surface mounted on the side, a first connecting portion for electrically connecting the substrate and the ground plate, and a second connecting portion for electrically connecting the conductive terminals of the substrate and the element portion. At least one of the first connection portion and the second connection portion has a spring property in the arrangement direction of the substrate and the ground plate.

The vehicle-mounted antenna device according to the present invention has an element portion provided on glass, a substrate including an amplifier for amplifying a signal obtained by the element portion, a storage portion for accommodating the substrate, and a substrate closer to glass than the substrate in the storage portion. A grounding portion attached to the side, a first connecting portion that electrically connects the board and the grounding portion, and a power feeding terminal portion having a second connecting portion that electrically connects the conductive terminal of the board and the element portion. Be prepared. At least one of the first connection portion and the second connection portion has a spring property in the arrangement direction of the substrate and the ground portion.
The vehicle-mounted antenna device according to the present invention includes an element portion provided on glass, a substrate including an amplifier for amplifying a signal obtained by the element portion, a storage portion for accommodating the substrate, and a glass rather than a substrate in the storage portion. A ground plate including a surface to be mounted on the near side, a first connection portion for electrically connecting the board and the ground plate, and a second connection portion for electrically connecting the conductive terminal of the board and the element portion. It is provided with a power feeding terminal portion to have. The storage portion has a holder on the side of the storage portion closer to the glass than the substrate, and a case attached to the holder by engagement. A cable that supplies power to the amplifier and outputs the signal obtained by the element unit is connected to the board. A non-conductive plate-shaped member is provided between the substrate and the holder. The substrate is housed between the case and the plate-like member and is removable to the holder. The ground plate is arranged between the plate-shaped member and the holder.

As described above, according to the present invention, it is possible to provide an in-vehicle antenna device or the like that can be easily grounded.

It is an exploded perspective view of the element part and the power feeding terminal part in this embodiment. It is a perspective view of an element part, a case including a substrate, a cable, a base, a 1st connection member and a 2nd connection member, and a holder including a ground plate and a sticking member. It is a perspective view of the earth plate formed in a C shape on the xy plane parallel to the substrate. It is sectional drawing which looked at the region A surrounded by the dotted line of FIG. 3 from the y direction. It is a perspective view which looked at the holder which attached the earth plate from the bottom. It is a perspective view which looked at the case including a substrate, a cable, a base, a 1st connection member, and a 2nd connection member from the bottom. It is a perspective view which looked at the power supply terminal part before the sticking member was attached from the bottom. It is a perspective view which looked at the power supply terminal part from the bottom. It is a perspective view which looked at the power supply terminal part from the top. It is a perspective view which shows the element part attached to the glass, and the power feeding terminal part before being attached to the glass. It is a perspective view which shows the element part and the power feeding terminal part attached to the glass. It is a front view which shows the element part attached to the glass, and the power feeding terminal part. FIG. 12 is a cross-sectional view taken along the line BB of FIG. It is a perspective view of the earth plate which has a long side extending in the longitudinal direction of the accommodating part of a power feeding terminal part, and a part is formed on the xy plane, and the other part is formed on the xz plane.

Hereinafter, this embodiment will be described with reference to the drawings. The vehicle-mounted antenna device 1 in the present embodiment is attached to the indoor side of the glass 90 of the vehicle such as a windshield, and includes an element portion 10 and a power feeding terminal portion 50 (see FIGS. 1 to 13).

The element portion 10 and the feeding terminal portion 50 form a film antenna device.
The element unit 10 and the power supply terminal unit 50 operate as a monopole type antenna to receive digital television broadcasts and transmit / receive data communication devices.

The element portion 10 has a base material 11, a conductive portion (antenna conductor) 13 on which a conductor pattern is formed, a conductive terminal 15, and a protective film 17.
The power supply terminal portion 50 includes a case 51, a substrate 53, a cable 55, a base 57, a first connecting member 59a, a second connecting member 59b, a holder 61, a ground plate 63, and a sticking member 65.

Next, the details of each part will be described.

In order to explain the direction, the longitudinal direction (left-right direction) of the power feeding terminal portion 50 is the x direction, and the conductor forming the conductive portion 13 of the element portion 10 in the vertical direction perpendicular to the left-right direction on the plane of the element portion 10. The longitudinal direction of the pattern) will be described as the y direction.
Further, it will be described that the surface of the element portion 10 on the plane facing the glass 90 of the vehicle is the back surface, the surface opposite to the back surface is the front surface, and the front and back directions perpendicular to the plane are the z direction.

When the element portion 10 is correctly attached to the glass 90, the x direction is the boundary line 92 between the non-transmissive region 91 and the translucent region 93 made of black ceramic or black ceramic dots in the glass 90 of the vehicle. The positional relationship is parallel to that in the area where the end portion of the element portion 10 and the power feeding terminal portion 50 are attached.
In FIGS. 10 to 12, the non-transmissive region 91 is represented by diagonal grid lines.

The configuration of the element unit 10 will be described.

The base material 11 is a transparent film having electrical insulation, and has a band shape that holds the conductor pattern of the conductive portion 13 arranged on the surface of the base material 11.
In the present embodiment, an example in which the conductive portion 13 has a substantially J-shaped conductor pattern is shown, but a form having another conductor pattern such as a double wire or a loop shape may be used.
Further, the conductive portion 13 may have a form having a conductor pattern formed by forming an extremely thin conducting wire into a mesh shape so as not to be visually recognized.
The dimension (about 95 mm) in the longitudinal direction (y direction) of the base material 11 is determined so that the total length of the conductor pattern of the conductive portion 13 is 1/4 or more of the wavelength λ of the radio wave received by the in-vehicle antenna device 1. NS.
On the surface of the end portion of the base material 11, a conductive terminal 15 provided at one end of the conductive portion 13 and electrically connected to the power feeding terminal portion 50 is arranged.
The base material 11 of the element portion 10 is formed in an I shape having a width shorter than the dimension of the storage portion (case 51, holder 61 in the longitudinal direction (x direction)) of the power feeding terminal portion 50.

The protective film 17 is a transparent material having electrical insulation, and is provided so as to sandwich the conductive portion 13 with the base material 11 in order to protect the conductive portion 13 arranged on the base material 11, and the conductive terminals 15 are arranged. It has almost the same shape as the base material 11 except for the provided portion.
An adhesive is applied to the back surface of the base material 11 to attach the element portion 10 to the glass 90.
Before the element portion 10 is attached to the glass 90, an application film (surface protective sheet, not shown) is attached to the surface of the base material 11, and the back surface of the base material 11 (the side facing the glass 90) is attached. A separator (back surface protective sheet, not shown) is attached to the surface).
The separator and application film are removed when the element portion 10 is attached to the glass 90.

The configuration of the power supply terminal portion 50 will be described.

The case 51 is made of ABS (Acrylonitrile Butadiene Styrene) resin or the like, has a substantially rectangular parallelepiped shape in which the surface facing the glass 90 opens, and has a substrate 53, a base 57, a first connecting member 59a, and a second connecting member 59b. , Cover from the side away from the glass 90.
A convex portion 51a is provided on the side surface of the case 51, and engages with a hole (engagement portion 61c) provided in the holder 61 when the power supply terminal portion 50 is assembled.
The substrate 53 is made of epoxy resin or the like, and has a circuit for making the conductive portion 13 function as an antenna element, such as an antenna amplifier.
The board 53 is housed in the case 51 in a removable state, and the case 51 and the holder 61 constituting the storage portion hold the board 53 in a sandwiched state.

The cable 55 is a coaxial cable, and the core wire (inner conductor) and the braided wire (outer conductor) are connected to the amplifier circuit of the substrate 53 to supply power to the antenna amplifier included in the substrate 53, or the conductive portion 13 It is used to output the obtained signal.
The base 57 is a non-conductive plate-shaped member (for example, a plate-shaped member made of ABS resin) that fits into the opening of the case 51 and sandwiches the substrate 53 with the case 51. 2 It has a hole or a notch (first notch 57a, second notch 57b) through which the connecting member 59b penetrates.

The first connecting member 59a is an elastic member formed by bending a conductive plate into a substantially S shape to have springiness, and is a ground side of an amplifier circuit of a substrate 53 (braided wire (outer conductor) of a cable 55). Is connected to the pattern) by soldering or the like, and is used for electrical connection between the substrate 53 and the ground plate 63.
The second connecting member 59b is an elastic member formed by bending a conductive plate into a substantially S shape to have springiness, and the input side of the amplifier circuit of the substrate 53 (the core wire (internal conductor) of the cable 55) is formed. It is connected to the connected pattern) by soldering or the like, and is used for electrical connection between the substrate 53 and the conductive terminal 15.

The holder 61 is made of ABS resin or the like and has a substantially rectangular parallelepiped shape. The bottom surface of the holder 61 faces the glass 90, and the surface opposite to the bottom surface opens, so that the substrate 53, the base 57, the first connecting member 59a, and the second connecting member 59b are viewed from the side close to the glass 90. cover.
Holes (first hole 61a, second hole 61b) through which the first connecting member 59a and the second connecting member 59b pass are provided on the surface (bottom surface) of the holder 61 facing the glass 90.
A hole (engagement portion 61c) that engages with the convex portion 51a of the case 51 is provided on the side surface of the holder 61.

The longitudinal direction (x direction) of the case 51 and the holder 61 has a dimension (about 58 mm) of 1/8 or less of the wavelength λ of the radio wave received by the vehicle-mounted antenna device 1.

A ground plate 63 is attached to the back side of the surface (bottom surface) of the holder 61 facing the glass 90.
The ground plate 63 is a conductive plate-shaped member (for example, a tin plate-shaped member) formed in a predetermined shape by a band-shaped conductor pattern having a total length and width required for grounding the antenna element (conductive portion 13). (See FIG. 3).
The ground plate 63 is formed in a C shape by cutting out a part of a wide annular band, and is provided on the bottom surface of the holder 61 constituting the storage portion along the inner circumference of the outer shape thereof. As a result, the ground plate 63 is formed on substantially the entire bottom surface of the holder 61.
The shape of the ground plate 63 is not limited to the C shape, and may be, for example, an L shape, a U shape, a J shape, a meander shape, or a spiral shape.

The first connecting member 59a comes into contact with the vicinity of one end 64a near the notched portion of the C-shaped conductor pattern forming the ground plate 63, and the surface of the ground plate 63 parallel to the substrate 53 is formed. The second connecting member 59b is located in the region 64b where the conductor pattern of the ground plate 63 is not formed in the rectangular frame including the ground plate 63, that is, in the notched portion (so that the second connecting member 59b does not contact the ground plate 63). ), The shape of the conductor pattern of the ground plate 63, and the positions of the first connecting member 59a and the second connecting member 59b are determined.
The shape of the ground plate 63 may be O-shaped as long as a region where the second connecting member 59b does not contact can be secured.

A plurality of engaging protrusions 63a cut up on the side facing the holder 61 are provided on the outer edge of the ground plate 63.
The engaging protrusion 63a has a first portion 63a1 separated from the ground plate 63 and a second portion 63a2 closer to the ground plate 63 than the first portion 63a1, and the first portion 63a1 has a wider shape than the second portion 63a2. (See FIG. 4).
The holder 61 engages with the engaging projection 63a (first portion 63a1, second portion 63a2).
In the present embodiment, as an example in which the first portion 63a1 has a wider shape than the second portion 63a2, the form in which the engaging projection 63a has an inverted convex shape will be described, but the first portion 63a1 separated from the ground plate 63 As long as it has a shape wider than the second portion 63a2 close to the earth plate 63, it may have a shape having another shape (for example, a dovetail shape).

The ground plate 63 is attached to the holder 61 by being integrally formed with the holder 61 (a part of the storage portion) by insert molding.
The holder 61 is formed through the first step of placing the earth plate 63 on the mold of the holder 61 and the second step of pouring the molten material of the holder 61 into the mold to form the holder 61.

In the second step, even if the material of the holder 61 enters between the first portion 63a1 and the ground plate 63, the holder 61 is formed in close contact with the surface of the engaging protrusion 63a and the ground plate 63, and aged deterioration occurs. The holder 61 and the ground plate 63 are hard to come off, and the process of attaching the ground plate 63 to the holder 61 can be simplified. The number and arrangement of the engaging protrusions 63a are determined in consideration of the holding force and durability.

However, the means for attaching the ground plate 63 to the holder 61 is not limited to the above. For example, after forming a holder 61 having a recess (not shown) on the bottom surface, the ground plate 63 can be attached to the holder 61 by fitting the engaging protrusion 63a into the recess, or sandwiched with the sticking member 65. It is conceivable that the holder 61 can be attached to the holder 61.

The sticking member 65 is made of double-sided tape, an adhesive, or the like, is provided on the surface of the ground plate 63 facing the glass 90, and is used for sticking the power supply terminal portion 50 including the ground plate 63 to the glass 90. Be done.
The sticking member 65 is provided with a region (third notch 65a) through which the second connecting member 59b penetrates.

The first connecting member 59a is sandwiched between the substrate 53 and the ground plate 63 via the first notch 57a and the first hole 61a, and the substrate 53 and the ground plate 63 are electrically connected by the urging force of the first connecting member 59a. It is connected to the target.
The second connecting member 59b projects from the surface of the power feeding terminal portion 50 facing the glass 90 via the second notch 57b, the second hole 61b, the region 64b where the conductor pattern is not formed, and the third notch 65a. When the power feeding terminal portion 50 is attached to the glass 90, it is sandwiched between the substrate 53 and the conductive terminal 15 of the element portion 10 previously attached to the glass 90, and the substrate 53 is urged by the urging force of the second connecting member 59b. And the conductive terminal 15 are electrically connected to each other.

Next, the procedure for assembling the power feeding terminal portion 50 will be described.
The substrate 53 to which the cable 55, the first connecting member 59a, and the second connecting member 59b are attached is housed in the case 51, and the base 57 is further housed in the case 51 (see FIG. 6).
A case 51 including a substrate 53, a cable 55, a base 57, a first connecting member 59a, and a second connecting member 59b is attached to a holder 61 to which the ground plate 63 is attached in advance (see FIG. 7).
The attachment member 65 is attached to the holder 61 so as to sandwich the ground plate 63 with the holder 61, and the power supply terminal portion 50 is completed (see FIGS. 8 and 9).

However, the sticking member 65 is stuck to the holder 61 to which the ground plate 63 is attached in advance, and then the substrate 53, the cable 55, the base 57, and the first are attached to the holder 61 including the ground plate 63 and the sticking member 65. The procedure may be such that the case 51 including the connecting member 59a and the second connecting member 59b is attached (see FIG. 2).

The case 51 is attached to the holder 61 by the engagement between the convex portion 51a of the case 51 and the engaging portion 61c of the holder 61, but if the engaged state is released, the case 51 can be removed from the holder 61. Can be done.
If a defect occurs in a member constituting the in-vehicle antenna device 1, such as the board 53 of the power feeding terminal portion 50 or the element portion 10, the board 53 housed in the case 51 can be repaired or repaired by removing the case 51 from the holder 61. It can be replaced or the element portion 10 can be replaced.

Next, a procedure for the sticking operator to stick the in-vehicle antenna device 1 to the glass 90 will be described (see FIGS. 10 to 13).

After peeling off the separator attached to the back surface of the element portion 10, the element portion 10 is attached to the glass 90 so that the conductive terminal 15 is located near the boundary line 92. It is peeled off from the part 10 (element part pasting step, see FIG. 10).

The longitudinal direction (x direction) of the power feeding terminal portion 50 is parallel to that of the region where the feeding terminal portion 50 is attached on the boundary line 92, and the second connecting member 59b is in contact with the conductive terminal 15. Then, the power feeding terminal portion 50 is attached to the glass 90 (see the feeding terminal portion attaching step, FIGS. 11 to 13).

In the present embodiment, the ground plate 63 that functions as the ground of the antenna element (conductive portion 13) is attached to the holder 61 that houses the substrate 53 in the feeding terminal portion 50 and the feeding terminal portion 50 to be attached to the glass 90. It is provided between the members 65 and is attached to the side (holder 61) closer to the glass 90 than the substrate 53 in the storage portion.
By attaching the power feeding terminal portion 50 to the glass 90, the ground (earth plate 63) of the antenna element (conductive portion 13) is also attached to the glass 90, so that grounding can be easily performed.

The base material 11 of the element portion 10 does not require a region for arranging a metal material (metal film, conductive paint) or the like for functioning as a ground, and only a region for arranging the conductive portion 13 and the conductive terminal 15. , Can be formed with a simple shape.
Further, since the ground plate 63 is arranged between the substrate 53 and the sticking member 65 (between the substrate 53 and the glass 90), the member corresponding to the earth plate is arranged adjacent to the same plane as the substrate 53. It is easier to secure the performance as a ground and the dimension of the power feeding terminal portion 50 (particularly the dimension in the longitudinal direction) can be reduced as compared with the above form.

If the ground plate 63 is attached to the holder 61 on the side closer to the glass 90 than the substrate 53, the inside of the storage portion composed of the case 51 and the holder 61 (the front side of the bottom surface of the holder 61). It may be in the form provided in.
For example, a form in which the ground plate 63 is provided between the base 57 and the holder 61 and is attached to the holder 61 by sandwiching the base 57, or a form in which the earth plate 63 is directly attached to the holder 61 can be considered.

The element portion 10 having a simple shape such as an I shape is formed in a complicated shape such as an L shape in which a conductive portion 13 is arranged on one side and a metal material functioning as a ground is arranged on the other side. Compared to the element part, the manufacturing cost can be reduced and the pasting can be simplified.

Further, the size of the power feeding terminal portion 50 is limited, and particularly when a sufficient length in the longitudinal direction (x direction) cannot be secured, the total length of the conductor pattern of the ground plate 63 becomes short, and the conductor of the ground plate 63 It is conceivable that the resonance frequency shifts to a higher region than when the total length of the pattern is long, but the total length of the conductor pattern of the conductive part 13 in the element part 10 formed in a simple shape such as a band is made longer than usual. Therefore, the resonance frequency can be shifted to a low frequency range to obtain a desired reception frequency for the entire vehicle-mounted antenna device 1.

In the present embodiment (FIGS. 1 to 13), an example is shown in which the conductor pattern of the earth plate 63 is formed in a C shape (on the xy plane parallel to the substrate 53) when viewed from the z direction. It may have a shape other than the mold shape, and is not formed only on the xy plane parallel to the substrate 53, but is formed on the plane (xy plane) perpendicular to the plane including the substrate 53 (xy plane). It may have a form having a plane parallel to the substrate 53 (a plane attached to the side closer to the glass 90 (holder 61) than the substrate 53 in the storage portion) other than the xz plane or the yz plane).

FIG. 14 is a meander-like shape having a long side (a side longer than a side extending in another direction) extending in the longitudinal direction (x direction) of the storage portion (case 51, holder 61) of the power feeding terminal portion 50, and a part of the holder. An example is shown in which the shape is formed on the xy plane facing the bottom surface of 61, and the other portion is formed on the xz plane perpendicular to the bottom surface.

By forming the conductor pattern of the ground plate 63 on the surface perpendicular to the surface including the substrate 53, the overall length of the conductor pattern of the ground plate 63 can be increased without increasing the longitudinal dimension of the power feeding terminal portion 50. Becomes possible.

In the present embodiment, an example in which the ground plate 63 is formed of a plate-shaped member made of tin or the like is shown, but if the ground plate 63 functions as a ground for the antenna element (conductive portion 13), it is limited to tin plate. It's not a thing.
For example, it is conceivable that the ground plate 63 is made of a metal material (metal film, conductive paint) and is attached (including pasted) to the holder 61.
Further, the ground plate 63 (earth portion) provided between the substrate 53 and the glass 90 is not limited to the plate-shaped member, and may be formed by bending a rod-shaped member, for example.

Further, in the present embodiment, as an example in which the element portion 10 is provided on the glass 90, a form in which the film-shaped element portion 10 is attached to the glass 90 has been described, but the conductor pattern of the element portion 10 is built in the glass 90. It may be in the form of

1 In-vehicle antenna device 10 Element part 11 Base material 13 Conductive part 15 Conductive terminal 17 Protective film 50 Power supply terminal part 51 Case 51a Convex part 53 Board 55 Cable 57 Base 57a First notch 57b Second notch 59a First connection member 59b 2nd connection member 61 Holder 61a 1st hole 61b 2nd hole 61c Engagement part 63 Earth plate 63a Engagement protrusion 63a1 1st part 63a2 2nd part 64a One of the ends of the conductor pattern of the earth plate 64b With the substrate in the earth plate Area where the conductor pattern of the ground plate is not formed within the rectangular frame including parallel surfaces 65 Pasting member 65a Third notch 91 Non-transmissive area of vehicle front glass 92 Boundary line 93 Translucent area of vehicle front glass

Claims (9)

The element part provided on the glass and
A substrate including an amplifier for amplifying a signal obtained by the element portion, a storage portion for accommodating the substrate, an earth plate including a surface of the accommodating portion to be attached closer to the glass than the substrate, and the above. A power supply terminal portion having a first connection portion for electrically connecting the substrate and the ground plate, and a second connection portion for electrically connecting the substrate and the conductive terminal of the element portion is provided.
One also less of the second connecting portion and the first connecting portion is to have a spring property to the array direction of the substrate and the ground plate,
Between the substrate and the ground plate, the said housing portion that has a plate-like member of electrically non-conductive is provided separately, the vehicle-mounted antenna apparatus characterized by. The longitudinal direction of the storage portion has a dimension of 1/8 or less of the wavelength of the radio wave received by the in-vehicle antenna device.
The vehicle-mounted antenna device according to claim 1, wherein the total length of the conductor pattern formed on the element portion has a dimension of 1/4 or more of the wavelength. The conductor pattern of the ground plate is formed in any of C-shaped, L-shaped, U-shaped, J-shaped, and a meander-shaped, spiral-shaped, or O-shaped having a long side extending in the longitudinal direction of the storage portion. The vehicle-mounted antenna device according to claim 1, wherein the vehicle-mounted antenna device is provided. The vehicle-mounted antenna device according to claim 3, wherein the conductor pattern of the ground plate has a surface parallel to the substrate and a surface perpendicular to the surface including the substrate. The conductor pattern of the ground plate is formed in any of a C-shape, an L-shape, a U-shape, a J-shape, a meander shape having a long side extending in the longitudinal direction of the storage portion, and a spiral shape.
The vehicle-mounted antenna device according to claim 1, wherein the first connecting portion is connected to an end portion of a conductor pattern forming the ground plate. The vehicle-mounted antenna device according to claim 1, wherein the ground plate is integrally formed with at least a part of the storage portion. The storage portion has a holder on the side of the storage portion closer to the glass than the substrate, and a case attached to the holder by engagement.
A cable that supplies electric power to the amplifier and outputs a signal obtained by the element unit is connected to the substrate.
Between the substrate and the holder, the plate-like member is provided,
The substrate is housed between the case and the plate-like member and is removable with respect to the holder.
The vehicle-mounted antenna device according to claim 1, wherein the ground plate is arranged between the plate-shaped member and the holder. The element part provided on the glass and
A substrate including an amplifier for amplifying a signal obtained by the element portion, a storage portion for accommodating the substrate, an earth plate including a surface of the accommodating portion to be attached closer to the glass than the substrate, and the above. A power supply terminal portion having a first connection portion for electrically connecting the substrate and the ground plate, and a second connection portion for electrically connecting the substrate and the conductive terminal of the element portion is provided.
At least one of the first connection portion and the second connection portion has a spring property in the arrangement direction of the substrate and the ground plate.
The storage portion has a holder on the side of the storage portion closer to the glass than the substrate, and a case attached to the holder by engagement.
A cable that supplies electric power to the amplifier and outputs a signal obtained by the element unit is connected to the substrate.
A non-conductive plate-like member is provided between the substrate and the holder.
The substrate is housed between the case and the plate-like member and is removable with respect to the holder.
An in-vehicle antenna device, wherein the ground plate is arranged between the plate-shaped member and the holder. The element part provided on the glass and
A substrate including an amplifier for amplifying a signal obtained by the element portion, a storage portion for accommodating the substrate, an earth plate including a surface of the accommodating portion to be attached closer to the glass than the substrate, and the above. A power supply terminal portion having a first connection portion for electrically connecting the substrate and the ground plate, and a second connection portion for electrically connecting the substrate and the conductive terminal of the element portion is provided.
The storage portion has a holder on the side of the storage portion closer to the glass than the substrate, and a case attached to the holder by engagement.
A cable that supplies electric power to the amplifier and outputs a signal obtained by the element unit is connected to the substrate.
A non-conductive plate-like member is provided between the substrate and the holder.
The substrate is housed between the case and the plate-like member and is removable with respect to the holder.
An in-vehicle antenna device, wherein the ground plate is arranged between the plate-shaped member and the holder.

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