JP4723176B2 - Indoor antenna - Google Patents

Description

  The present invention relates to an indoor antenna for receiving television broadcast or radio broadcast.

There are two types of conventional indoor antennas that can be mounted on a tabletop and used on a wall or the like. (For example, see Patent Document 1)
According to this indoor antenna, when used as a desktop antenna, the main body can be supported from the rear side by a stand held in a support position by a support means. Stability is ensured.
When the indoor antenna is attached to a wall or the like, the stand can be stored on the back of the main body and the wall hanging portion of the stand can be used. The projecting width from the door is small, and compactness can be achieved.

JP 2002-237709 A

However, the indoor antenna having the above-described configuration requires a main body, a stand, and accompanying components, and uses a large amount of constituent materials, resulting in a complicated configuration, which increases costs.
Furthermore, this indoor antenna has a structure in which, for example, the mounting position of the UHF antenna element cannot be adjusted more finely because the mounting position of the antenna element is fixed regardless of whether the UHF antenna element is mounted on a desktop or a wall surface. It was.
Therefore, in this application, it was made to solve these problems.
The purpose is to provide an indoor antenna that ensures stability when used on a desktop and can be easily mounted even when used on a wall.
Another object is to provide an indoor antenna capable of finely adjusting the sensitivity of the antenna element.
Another object is to provide an inexpensive indoor antenna with few components.
Another object is to provide an indoor antenna that can reduce the packing volume and the materials required for packing.

In order to achieve the above object, an invention according to claim 1 is directed to an indoor antenna comprising a main body base and an antenna portion.
The antenna portion is substantially U-shaped, and includes an antenna cover formed so that base ends on both sides thereof are opposed to each other on the same axis, and an antenna wire disposed inside the antenna cover. ,
A part of the base end portion is provided with a stop portion having an outer diameter larger than the base end portion over the entire circumference or a part of the base end portion in the circumferential direction.
The main body base includes a base formed of a synthetic resin and a cover that covers the base.
A side wall to be joined to the opening end of the cover is integrally formed around the base, and a base end portion of the antenna unit is rotatably supported on the side wall and the opening end of the cover. A pair of bearings is formed,
Moreover, in the substrate, wherein the inner side of the respective bearing portions, respectively, sandwiching a portion of the proximal end from both sides, and pressed in the direction orthogonal to the axial direction of the proximal portion, the proximal A pair of rod-like elastic support pieces that hold the rotation of the part with a predetermined force are integrally formed with the base body ,
The stop portion is disposed at a position where an outer side surface thereof is in contact with or close to an inner side surface of the elastic support piece or an inner side surface of the bearing portion. It is characterized by preventing slipping out.

According to the indoor antenna of the first aspect, the antenna portion is attached to the main body base so as to be pivotable back and forth, and the antenna portion is moved outward by the stop portion provided at the base end portion of the antenna portion. Since it is configured to prevent it from coming out, it is compact and very stable when used on a desktop, and the sensitivity in the vertical direction is not to mention adjusting the sensitivity in the horizontal direction. An indoor antenna that can be adjusted freely and is easy to handle can be provided.
In addition, when this antenna is used on a wall surface, the antenna part can be turned up and down, so that the sensitivity can be adjusted and the protruding width from the wall surface can be reduced to reduce the size of the room. An antenna can be provided.
In addition, the base end portion of the antenna portion is not only supported rotatably on the bearing portion of the main body base, but also on both sides by a pair of elastic support pieces integrally formed on the base inside the bearing portion. Therefore, when adjusting the sensitivity of the antenna unit, the antenna unit can be securely fixed with a slight force, and the antenna unit can be repeatedly operated. Even if it is moved, the holding force that maintains the state can be maintained. Therefore, fine sensitivity adjustment is possible, and a highly reliable indoor antenna can be provided.
In addition, since the antenna unit can be accommodated in a compact manner by being close to or in contact with the main body base, the packing volume of the entire antenna and the materials required for packing can be reduced, and an inexpensive indoor antenna can be provided in this respect as well. .

Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of the indoor antenna of the present application. FIG. 2 is an exploded view of the indoor antenna of the present application. FIG. 3 shows a pivoting portion of the antenna portion according to the present application. (A) is a principal part enlarged view from the side. (B) The partial sectional view of an AA line. (C) It is a partial sectional view of a BB line. FIG. 4 is an enlarged view of a main portion of the pivot attachment portion. FIG. 5 is a schematic view showing a procedure for attaching the antenna unit. FIG. 6 shows an example in which the indoor antenna of the present application is attached to a wall surface.

  In the figure, the indoor antenna 1 comprises a main body base 2, an antenna section 3, a known rod antenna 4, and a coaxial cable 5 provided with a connection plug 5a at the end. The rod antenna 4 may or may not be present. In order to facilitate the description of the indoor antenna of the present application, the main body base 2 and the antenna unit 3 of the indoor antenna 1 will be described below.

The main body base 2 includes a base 10 formed of a synthetic resin material (for example, ABS resin, polypropylene resin, polystyrene resin, etc.) and a cover 20 formed in a hollow shape.
In the base body 10, 11 and 11 are bearing portions provided on the side wall 10a formed so as to surround the substantially outer periphery of the base body, and 12 and 12 are left and right (up and down as shown in FIG. 2) with respect to the axis of the bearing portion. It is the elastic support piece arrange | positioned in.
Reference numerals 15 and 15 denote rod antenna fixing portions, and the rod antennas 4 and 4 are screwed by screws 15a and 15a. Reference numerals 15b and 15b denote connection terminals, which are fixed by the fixing portion 15 and the screws 15a and 15a. These connection terminals are connected to tip portions 42a and 42b of antenna element wires.
Reference numeral 16 denotes a coaxial cable fixing portion, and a substantially U-shaped groove is formed in the central portion of the coaxial cable fixing portion 16. The coaxial cable is fitted into the U-shaped groove of the fixed portion to prevent attachment and pull-out.
The elastic support pieces 12 and 12, the fixing portions 15 and 15, the coaxial cable fixing portion 16 and the like are integrally formed with the base 10.

In the cover 20, reference numerals 21 and 21 denote bearing portions formed at the opening end 20a of the cover.
A concave portion 23 is formed inward from the surface side of the cover 20, and a switching means (in the embodiment of the present invention, a rotary switch) to be described later is attached to the concave portion from the inner side of the cover 20.

  The antenna portion 3 is formed by forming an antenna cover formed of a synthetic resin material (for example, ABS resin, polypropylene resin, polystyrene resin, etc.) into a substantially U shape, and the base end portion 30 of the antenna portion is on the same axis. As shown in the figure, a shape is arranged that is opposed to the inner side. The antenna cover of the antenna unit 3 of the present application is composed of two constituent members each molded with a mold, and after the antenna element wire 41 is fixed to the inside of one of the constituent members by a well-known locking means, this configuration The antenna part 3 is formed by joining the members.

Next, a pivoting method between the main body base 2 and the antenna unit 3 will be described in detail.
As described above, the antenna part 3 is made of a synthetic resin material. The antenna cover of the antenna part 3 has elasticity, and the shape of the antenna can be freely deformed to some extent. Therefore, the base end portion 30 is fitted to the elastic support pieces 12 and 12 provided on the base 10 while the base end portions 30 and 30 are expanded outward in the axial direction.

  A schematic view at this time is shown in FIG. The base end 30 is brought into contact with the elastic support piece 12 from above (a). The elastic support piece 12 is provided with a locking portion 12a, and the base end portion 30 press-fits the base end portion 30 while expanding the locking portion 12a outward (b). The base end portion 30 that has passed over the locking portion 12a is sandwiched between the elastic support pieces 12 and 12. The vicinity of the lower portion of the locking portion provided inside the elastic support pieces 12 and 12 is provided with R so as to be substantially the same as the curvature of the base end portion, and the base end portion 30 and the elastic support pieces 12 and 12 The contact area is configured to have an appropriate size. Further, the diameter D of the base end portion 30 and the distance L between the elastic support pieces 12 and 12 are substantially equal, or the diameter D is slightly larger. The base end portion 30 is formed by the elastic support pieces 12 and 12. It is pressed with a predetermined force (c).

  Furthermore, a stop portion 31 formed slightly larger than the outer diameter of the base end portion 30 is formed on the distal end portion of the base end portion 30 over a part or the entire circumference, and the stop portion 31 is formed by the elastic support piece 12. It arrange | positions so that it may contact | abut or may become near. In this way, the antenna unit 3 is pivotally attached to the base 10 and can freely rotate the antenna unit back and forth while having a predetermined holding force, and restricts movement in a direction orthogonal to the axis of the base end 30. , Restricts the movement of the base end portions 30 and 30 against the outward force.

  Next, when the antenna unit 3 is attached to the base 10, the coaxial cable 5 and each antenna element wire 41 a, 41 b, 42 a, 42 b are wired to the rotary switch that is the switching means 40. This wiring is a schematic diagram written for the purpose of briefly explaining the configuration, and the details are not limited to this embodiment, and not only the antenna wire but also a component such as a coil is used as a switching means. In some cases, the connection is not limited.

  If the coaxial cable 5 and the antenna element wires 41a, 41b, 42a, and 42b have been wired to the switching means 40, a through hole in which the knob portion of the switching means 40 is formed in the recess 23 from the inside of the cover. After being inserted through (not shown), the switching means 40 is temporarily fixed with a nut or the like from the front side of the cover.

If the switching means 40 is temporarily attached to the cover 20, the cover 20 is attached to the base body 10.
At this time, bearing portions 21 and 21 of the cover are formed at the opening end 20a of the cover 20 at positions where the antenna portion 3 and the mounting portion of the base 10 are opposed to each other, and when the cover 20 is attached to the base 10 In addition, an insertion hole is formed by the base end portion 30 with the bearing portions 21 and 21 of the cover and the bearing portions 11 and 11 of the base body. As a result, the antenna unit 3 restricts the movement of the base end 30 against the pressing in the inner direction of the axis.

After the cover is attached, the switching means 40 temporarily fixed with a nut or the like is held and fixed from the front side of the cover with a predetermined tool. Further, a sensitivity adjusting knob is further attached to the fixed knob of the switching means 40 to facilitate switching, and the antenna is integrated with the cover in terms of design.
In the embodiment of the present application, a through hole 18 is formed at the bottom of the base, and when the nut or the like is fixed, the switching means can be fixed from the through hole 18 with a fingertip or the like. It is configured to facilitate the work.

  Next, the case where the indoor antenna 1 of this application is attached to the wall surface 49 etc. is demonstrated. As shown in FIG. 6, the base 10 of the present application is provided with a mounting hole 19 for wall mounting, and the screw head of the mounting screw 50 screwed into the wall 49 is inserted into the mounting hole 19 and locked. To do. The mounting hole 19 may be formed integrally with the base body 10 as shown in the embodiment of the present invention, or a bottom plate made of a metal material having substantially the same shape as the base body is provided on the back surface of the base body 10. , A mounting hole may be formed in the bottom plate. By selecting the size and weight of the bottom plate as appropriate, the bottom plate not only has excellent stability when mounted on a table but also increases the strength when mounted on the wall.

As described above, the indoor antenna 1 of the present application has a compact design when used on a desktop, so that the stability is very good. In addition, the antenna unit can be rotated back and forth. Since it is configured to be movable, it is possible to adjust the sensitivity in the vertical direction as well as the sensitivity adjustment in the horizontal direction, so that an indoor antenna that is highly convenient in terms of handling can be provided.
Furthermore, when this antenna is used on a wall surface, the antenna part can be turned up and down, so that fine sensitivity adjustment can be performed as in the above embodiment, and the protruding width protruding from the wall surface can be increased. It can be made smaller and can be made more compact.
In addition, since the antenna unit 3 holds the base end 30 and the elastic support pieces 12 and 12 with an appropriate pressure, when the sensitivity of the antenna unit 3 is adjusted, It is possible to provide a highly reliable indoor antenna that can be securely fixed with a slight force, and that retains the holding force to maintain the state even when the antenna portion is repeatedly moved.

  In addition, the features of the present application are shown in FIG. In the embodiment of the present application, it is a room antenna that can be mounted on a desktop or a wall, and includes two antennas having different reception bands (in the embodiment of the present application, the antenna unit 3 and the rod antenna 4), and a main body for fixing the antenna In an indoor antenna having a base, at least one of the antenna parts (antenna part 3 in the present application) can be rotated back and forth (up and down in the case of wall mounting) by 180 ° or more with the antenna attached to the main body base. In addition, the one antenna (in the case of the present application, the antenna unit 3) and the other antenna (in the present application, the rod antenna 4) are arranged close to or in contact with each other to be compactly accommodated. Therefore, the packing volume of the entire antenna and the materials required for packing can be reduced. Tena is able to provide.

It is a perspective view of the antenna of this application. It is an exploded view of the indoor antenna of this application. The pivot part of the antenna part concerning this application is shown. The antenna is pivotally attached, (a) is an enlarged view of the main part from the side. (B) The partial sectional view of an AA line. (C) It is a partial sectional view of a BB line. It is the schematic which shows the procedure which attaches an antenna part. The example which attaches the indoor antenna of this application to a wall surface is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Indoor antenna, 2 ... Main body case, 3 ... Antenna part, 4 ... Rod antenna, 5 ... Coaxial cable, 5a ... Connector, 10 ... Base | substrate, 10a ... Side surface, 11 ... Bearing part, 12 ... Elastic support piece, 12a ... Locking portion, 12b ... side surface, 13 ... support piece, 13a ... through hole, 13b ... antenna wire insertion hole, 15 ... rod antenna fixing portion, 15a ... screw, 15b ... connection terminal, 16 ... coaxial cable fixing portion, 18 DESCRIPTION OF SYMBOLS ... Through-hole, 19 ... Mounting hole, 20 ... Cover, 20a ... Open end, 21 ... Bearing part, 23 ... Recessed part, 30 ... Base end part, 31 ... Stop part, Switching means, 41a, 41b, 42a, 42b ... Antenna Wire, 49 ... wall surface, 50 ... screw.

Claims (1)

In an indoor antenna consisting of a main body base and an antenna part,
The antenna portion is substantially U-shaped, and includes an antenna cover formed so that base ends on both sides thereof are opposed to each other on the same axis, and an antenna wire disposed inside the antenna cover. ,
A part of the base end portion is provided with a stop portion having an outer diameter larger than the base end portion over the entire circumference or a part of the base end portion in the circumferential direction.
The main body base includes a base formed of a synthetic resin and a cover that covers the base.
A side wall to be joined to the opening end of the cover is integrally formed around the base, and a base end portion of the antenna unit is rotatably supported on the side wall and the opening end of the cover. A pair of bearings is formed,
Moreover, in the substrate, wherein the inner side of the respective bearing portions, respectively, sandwiching a portion of the proximal end from both sides, and pressed in the direction orthogonal to the axial direction of the proximal portion, the proximal A pair of rod-like elastic support pieces that hold the rotation of the part with a predetermined force are integrally formed with the base body ,
The stop portion is disposed at a position where an outer side surface thereof is in contact with or close to an inner side surface of the elastic support piece or an inner side surface of the bearing portion. An indoor antenna characterized by preventing slipping out.

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