JP5543264B2 - Antenna device - Google Patents

Description

The present invention relates to an antenna device, and more particularly, to an antenna device capable of supporting reception of radio waves transmitted with horizontal polarization and reception of radio waves transmitted with vertical polarization.

The UHF antenna for receiving terrestrial digital broadcasts has a small diameter as it has been undergoing full-scale renovation work to receive terrestrial digital broadcasts toward the complete stop of analog broadcasting. In addition to the long Yagi / Uta antennas composed of element elements, there is a need for high-performance antennas that are small in size. And the installation location of the antenna is required not only to install on the roof as in the past, but also to be installed in various installation locations such as a veranda and a wall surface, and further to any location such as a house. Even so, there is a demand for an antenna device with a completely new design in order to avoid discomfort.
In general, such a newly designed antenna device is configured by arranging and housing antenna elements such as radiators and reflectors in a designed synthetic resin case appropriately. Therefore, it can be used as an outdoor antenna that can be mounted on the wall of a building or mounted on an antenna mast or veranda. For example, if it is configured to be independent by providing a dedicated stand, it is conventional. Unlike indoor antennas composed of small-diameter element elements and rod antennas, the antenna elements are not exposed, so they can be used comfortably as indoor antennas.

By the way, there are two types of radio waves propagating using linearly polarized waves: horizontal polarized waves and vertical polarized waves. For example, in terrestrial television broadcast waves, areas that are generally broadcast using horizontally polarized radio waves Many. However, depending on the environment such as the topography at the receiving location, broadcasting using vertically polarized radio waves may be able to propagate the radio waves more efficiently. Therefore, broadcasting using vertically polarized radio waves is performed. There are some areas. For this reason, it is desirable that the antenna device with the new design as described above is configured to receive both horizontally polarized waves and vertically polarized waves. As the cheapest and simplest method for that purpose, for example, even if the main usage pattern is an antenna device that is used for horizontally polarized wave reception, the center of the antenna device is moved back and forth so that it can be used for vertically polarized waves. It is conceivable to use a structure that can be attached to an attachment object in a state of being rotated 90 degrees with an axis extending in the direction as a rotation axis.
By the way, in such an antenna device whose main usage is for horizontally polarized wave reception, the output terminal of the antenna device protrudes substantially downward in the vertical direction when installed so as to receive horizontally polarized waves. It is general that they are arranged as described above. This is because the output terminal is provided so as to protrude downward in the vertical direction. For example, even when the antenna device is installed outdoors, a well-known waterproof cap or the like is used to connect the coaxial cable to the output terminal. This is because it can be easily achieved that rainwater enters the output terminal directly or through the coaxial cable and prevents the rainwater from entering the antenna device from the output terminal.
(For example, see Patent Document 1)

JP 2008-048004 A

However, when an antenna device configured so that the output terminal protrudes downward in the vertical direction in a state where it is installed so as to receive horizontally polarized radio waves is used for receiving vertically polarized radio waves, Since the axis that penetrates the center of the device in the front-rear direction is used as a rotation axis, it is attached to the attachment object in a state of being rotated 90 degrees, so the output terminal of this antenna device is arranged to protrude outward in the horizontal direction. Will be. For this reason, considering the situation in which rainwater is blown by wind or the like, the output terminal protrudes vertically downward even if a waterproof cap is provided to cover the connection between the coaxial cable and the output terminal. Compared to the case, rainwater directly or through a coaxial cable reaches the connection part between the coaxial cable and the output terminal, and there is a higher risk that rainwater will enter the antenna device from the output terminal. The connection between the coaxial cable and the output terminal requires more strict waterproofing, which increases the difficulty of installation such as the installation of the antenna device, and increases the cost of the product. .
Therefore, in the present application, an object of the present invention is to solve the problems of the prior art as described above and to provide an antenna device that can handle both horizontally polarized waves and vertically polarized waves.
The purpose is to provide a highly reliable antenna device with a simple configuration that can handle both horizontally polarized waves and vertically polarized waves.
Another object is to provide an antenna device that can be easily attached to an object to be attached.
Another object is to provide a low-cost antenna device.

In order to solve the above-mentioned problems, the invention of claim 1 is directed to an antenna element, an output terminal comprising a cylindrical conductor seat having a center conductor and an outer conductor provided concentrically with the center conductor, and the antenna element. And a housing that supports the output terminal, and a feeding point provided in the antenna element, and a center conductor and an external conductor of the output terminal are within a space formed inside the housing. In the antenna device configured to output a signal received by the antenna element from the output terminal by being electrically connected,
The output terminal comprises an output terminal portion provided with an attachment / detachment end to / from which a coaxial cable terminal is attached / detached at least on one end side, and at least 90 with an axis parallel to the center line in the front-rear direction of the antenna device as a rotation axis The output terminal is fixed by a fixing means so as to be rotatable within a range of °, and at least the output terminal portion protrudes downward from the horizontal direction in a state where the antenna device is installed on an attachment target. The plane including the axis of the output terminal portion is a plane including at least the center line in the front-rear direction of the antenna device and disposed substantially parallel to the plane orthogonal to the horizontal direction. , It is configured to be rotatable within a range of positions substantially parallel to the horizontal direction.

According to a second aspect of the present invention, in the antenna device according to the first aspect, the casing includes an antenna element casing portion having a housing space for supporting the antenna element therein, and a back surface of the antenna element casing portion. Connected to the housing space formed inside the antenna element housing part and an opening provided so as to penetrate a part of the back surface of the antenna element housing part, It comprises a terminal housing part having an internal space in which an open part is formed on the antenna element housing part side, and at least the output terminal part of the output terminal projects the detachable end to the terminal housing part. And the output terminal is a fixed portion provided on the back surface of the antenna element casing with an axis parallel to the center line in the front-rear direction of the antenna device as a rotation axis. Vs. The antenna element is rotatably fixed by the fixing means, and is provided on the antenna element and a central conductor and an external conductor on the other end side of the output terminal portion located in the internal space of the terminal housing portion. The feeding points are connected to each other by connecting means that can swing through the opening.

According to a third aspect of the present invention, in the antenna device according to the second aspect, the opening has a length corresponding to a swing range of the connection means that swings as the output terminal rotates. In addition, a long groove formed concentrically with the axis of the fixing portion is used.

According to a fourth aspect of the present invention, in the antenna device according to any one of the second to third aspects, the rear surface of the antenna element housing portion protrudes so as to surround the fixing portion and the long groove. A double wall provided concentrically with the axis of the fixing portion and spaced apart from each other by a predetermined distance; and an inner wall protruding from the double wall And a support receiving portion formed on the bottom surface between the outer protruding wall and the outer protruding wall, and the terminal housing portion includes an opening portion of the internal space in the terminal housing portion. A double protective wall disposed concentrically with the rotation axis of the terminal housing portion and spaced apart from each other by a predetermined distance; A protective wall portion is formed which is formed by uneven means formed at the tip of the inner protective wall. When the terminal casing is fixed to the fixing portion of the antenna element casing by the fixing means, the inner protective wall of the terminal casing protrudes inward of the support receiving portion. The uneven means inserted between the wall and the outer protruding wall, and the uneven means formed at the tip of the inner protective wall is formed on the bottom surface between the inner protruding wall and the outer protruding wall. And the outer protective wall is disposed outside the outer protruding wall.

According to a fifth aspect of the present invention, in the antenna device according to the fourth aspect of the present invention, the support receiving portion is disposed on the outer side of the double protruding wall and concentrically with the axis of the fixing portion. A third projecting wall is provided, and when the terminal casing is fixed to the fixing portion of the antenna element casing by the fixing means, the inner side protection of the terminal casing is achieved. The wall is inserted between the inner projecting wall and the outer projecting wall of the support receiving part, and the uneven means formed at the tip of the inner protective wall is provided between the inner projecting wall and the outer projecting wall. And the concavo-convex means formed on the bottom surface of the outer periphery of the third protective wall, the outer peripheral surface of the third projecting wall and the inner peripheral surface of the outer protective wall are in sliding contact, and at least the front end surface of the outer protective wall. The antenna element housing is arranged so that the back of the housing contacts.

According to a sixth aspect of the present invention, in the antenna device according to any one of the third to fifth aspects, the length of the long groove is set to the end portion on one side of the long groove and the center of the fixing portion. By providing the angle formed by the terminal portion on the other side of the long groove to be larger than the rotation angle of the terminal housing part, the support receiving part is centered on the axis of the fixing part, A state where the front end side is assembled with the fixed portion of the antenna element casing portion so that a fan-shaped fixed piece surrounded by the long groove is formed and the output terminal is in sliding contact with the back surface of the antenna element casing portion. In the case of rotating the output terminal, the convex / concave means of the protective wall portion gets over the concave / convex means of the support receiving portion while bending the fixing piece outward of the antenna element housing portion. The mating is released and the protective wall When the rotation of the output terminal is stopped in a state where the uneven means of the portion has passed over the uneven means of the support receiving portion, the uneven means is attracted to the uneven means side by the urging force of the fixing piece. Thus, the fixed piece is used as an urging means so as to be fitted.

According to the first or second aspect of the present invention, the output terminal is configured to be fixed by being held by the fixing means so as to be rotatable within a range of at least 90 °, and the power feeding portion between the output terminal and the antenna element is provided By connecting with a swingable connection means inside the housing, even when receiving radio waves sent with horizontal polarization with this antenna device, receive radio waves sent with vertical polarization Therefore, even when the antenna device is rotated by 90 °, the output terminal portion protruding from the output terminal to the outside does not face in the horizontal direction. Because the coaxial cable connected to the output terminal can be pulled out downward, which is a common wiring method, regardless of the received polarization, a well-known waterproof cap can be used. Since the output terminal part and the connection part of the coaxial cable can be protected from rain water or the like simply by being attached, an antenna device having a very simple configuration and high reliability can be provided.

Preferably, as in the invention of claim 3, in the antenna device of claim 2, the opening corresponds to a swing range of the connection means that swings as the output terminal rotates. With a long length, and a long groove formed concentrically with the axis of the fixing part, the short side of the long groove has a width that allows the connecting means to be freely inserted, In addition, even if the size of the connection device is limited so that it does not move significantly due to vibrations caused by wind or the like blowing on the antenna device, the connection device that swings with the rotation of the output terminal is: Since it moves smoothly along the long groove, smooth rotation of the output terminal is not disturbed. In addition, even if the connecting means swings as the output terminal is rotated, no extra load is applied to the connecting means, so that the output terminal can be freely rotated as in the embodiment of the present invention. Even if configured, high reliability can be maintained.

Preferably, as in the invention of claim 4, in the antenna device according to any one of claims 2 to 3, the fixing portion and the long groove are formed on a back surface of the antenna element housing portion. A wall projecting so as to surround, a double projecting wall disposed concentrically with the axis of the fixing portion and spaced apart from each other by a predetermined distance, and the double projecting wall A support receiving portion is formed on the bottom surface between the inner protruding wall and the outer protruding wall, and the terminal housing portion includes the inner portion of the terminal housing portion. A wall that protrudes so as to surround the open portion of the space, and is disposed concentrically with the rotating shaft of the terminal housing, and is provided with a double protective wall provided at a predetermined distance from each other; , A protective wall comprising convex and concave means formed at the tip of the inner protective wall of the double protective wall And the inner protective wall of the terminal casing is supported by the fixing means when the terminal casing is pivotally fixed to the fixing portion of the antenna element casing by the fixing means. The concave and convex means formed between the inner projecting wall and the outer projecting wall of the receiving part and formed at the tip of the inner protective wall are formed on the bottom surface between the inner projecting wall and the outer projecting wall. By being configured to be fitted to the uneven means and arranged so that the outer protective wall is located outside the outer protruding wall,
The output terminal is always subjected only to the downward pulling force of the coaxial cable connected to the detachable end of the output terminal section. For example, a strong wind blows or stops on the coaxial cable, and the coaxial cable is Even if a force to swing the output terminal is applied to the output terminal, the inner side of the output terminal is fixed to the back surface of the antenna element casing by fixing means. The uneven means on the output terminal side formed at the front end portion of the protective wall and the uneven means on the support receiving portion side formed on the bottom surface between the inner projecting wall and the outer projecting wall are fitted together. Therefore, even if moment force by the coaxial cable is continuously applied to the output terminal, the output terminal can maintain a predetermined position. Even if the fixing means is slightly loosened, the arrangement direction of the output terminals can be maintained by fitting the uneven means and the uneven means.

Preferably, as in the invention of claim 5, in the antenna device of claim 4, the support receiving portion is disposed on the outside of the double protruding wall and further concentrically with the axis of the fixing portion. A third projecting wall is provided, and when the terminal casing is fixed to the fixing portion of the antenna element casing by the fixing means, the inner side of the terminal casing A protective wall is inserted between the inner projecting wall and the outer projecting wall of the support receiving portion, and the uneven means formed at the tip of the inner protective wall is provided between the inner projecting wall and the outer projecting wall. The concave and convex means formed on the bottom surface of each other, and the outer peripheral surface of the third protruding wall and the inner peripheral surface of the outer protective wall are in sliding contact with each other, and at least the front end surface of the outer protective wall So that the back of the antenna element housing is in contact with By form it was,
For example, even if there is rainwater sprayed on the output terminal or water droplets that have reached the output terminal through the back surface, it is difficult for the rainwater or water droplets to enter the output terminal (that is, the terminal housing). Moreover, even if rainwater enters the slidable contact surface between the inner peripheral surface of the outer protective wall and the outer peripheral surface of the third projecting wall disposed on the outermost side due to a capillary phenomenon or the like, the rainwater is not separated by gravity or capillary tube. Due to the phenomenon, it reaches the lower side of the output terminal along the sliding contact surface, and comes out of the drain groove due to the presence of the drain groove exemplified below.
Furthermore, even if it penetrates into the interior beyond the third projecting wall from the sliding contact surface, as will be exemplified in detail below, the space formed between the third projecting wall and the outer projecting wall The above-mentioned water droplets are prevented from entering, and the water droplets travel along the outer peripheral surface of the outer projecting wall of the double projecting walls and from the drain groove formed at a position below the support receiving portion. Because it comes out through the drain groove formed at the position below. It has a highly reliable configuration.
In addition, the positions at which the uneven means and the uneven means are fitted are determined by the contact surface between the tip of the outer protective wall of the protective wall portion and the back surface of the antenna element housing portion, and the inner peripheral surface of the outer protective wall. And an outer peripheral surface of the third projecting wall and a space formed between the third projecting wall and the outer projecting wall, and provided inside the double projecting wall. Therefore, even if there is a gap generated in the fitting portion between the uneven means and the uneven means, water does not enter from the fitting portion, so that the waterproof performance can maintain reliability for long-term use. it can.

Further, preferably, as in the antenna device according to claim 6, the fixing piece formed in a fan shape provided in the antenna device according to any one of claims 3 to 5 is used as an urging means. By configuring to use,
If a force is applied to pull the output terminal outward along the axis of the fixing means, the fixing piece will bend, and if no pulling force is applied, the output terminal will return to its original state by the urging force of the fixing piece. The operation is slightly performed so that the fixing means is not loosened to the extent that the fitting state between the uneven means and the uneven means is released, that is, the output terminal and the back surface of the antenna element housing part are in sliding contact. If it is loosened, it is possible to maintain the fitting state between the uneven means and the uneven means, so that the arrangement direction of the output terminals can be set easily and reliably while maintaining a good operational feeling. Even if the fixing means is slightly loosened, the urging means can maintain the direction of arrangement of the output terminals by fitting the fixing piece, the uneven means and the uneven means.

It is the schematic for demonstrating the antenna apparatus of this invention, (a) is the perspective view seen from the back at the time of horizontal polarization reception, (b) is the perspective view seen from the back at the time of vertical polarization reception. It is a schematic block diagram for demonstrating the output terminal with which the antenna apparatus of this invention was equipped, (a) is the enlarged front view seen from the back side of the antenna apparatus, (b) is the AA line in (a). A side view with a part broken away, as viewed from (c) is a bottom view with a part broken away, as seen from line BB in (a), and (d) is a diagram for explaining the movable range of the output terminal. It is a front view. It is the schematic for demonstrating the support receiving part of the antenna apparatus of this invention, (a) is the front view which expanded the support receiving part, (b) is the support receiving part seen from the DD line in (a). FIG. It is the schematic for demonstrating the output terminal of the antenna apparatus of this invention, (a) is a front view of an output terminal, (b) is a back view of an output terminal, (c) is the EE line in (b). It is sectional drawing of the output terminal seen from. It is a figure for demonstrating the fitting state of the support receiving part and output terminal in the antenna apparatus of this invention, (a) is an exploded view, (b) is sectional drawing which expanded a part in order to show a fitting state. . It is a figure for demonstrating the concrete assembly state of the support receiving part and output terminal in the antenna apparatus of this invention. (The drawing of the output terminal 10 is a cross-sectional view taken along line CC in FIG. 2A.) It is an Example from which the support receiving part of the antenna device of this invention differs, (a) is the front view which expanded the support receiving part, (b) is sectional drawing of the support receiving part seen from the FF line in (a). It is.

An embodiment of the antenna device of the present invention will be described below.
1A and 1B are schematic views for explaining an antenna device of the present invention, in which FIG. 1A is a perspective view seen from the back when receiving horizontally polarized waves, and FIG. 1B is a perspective view seen from the back when receiving vertically polarized waves. FIG.
In the following description, a specific example of the antenna device 1 of the present invention will be described using an example of a UHF antenna. However, the present invention is not particularly limited to a UHF antenna.
In addition, when directions are indicated in the following description, unless otherwise specified, the installation direction of the antenna device 1 is used as a reference, the front side of the antenna device 1 is described as the front side or the front side, and the rear side of the antenna device 1 is the rear side. Or the back side. That is, in the arrangement in FIG. 1, the diagonally lower left side (front side) is the rear side or the back side, and the diagonally upper right side (depth side) in the figure is the front side or the front side.

An antenna device 1 according to the present invention will be described with reference to FIGS. An antenna device 1 according to the present invention includes an antenna element not shown in the figure and an antenna element casing 5 molded with a resin material or the like so as to have an accommodating space for accommodating the antenna element. An output having an antenna body 2 and a cylindrical connecting seat having at least a central conductor and an outer conductor concentrically provided with the central conductor, and having an attachment / detachment end 11a to which a terminal of a coaxial cable is attached and detached at one end side A terminal molded with a resin material or the like that is provided along the terminal portion 11 and the back surface 5a of the antenna element housing portion 5 and supports the detachable end 11a of the output terminal portion 11 so as to protrude outward. An output terminal 10 composed of a housing portion 12 and an antenna mounting bracket 50 detachably fixed to mounting bracket attachment portions 51 and 52 provided on the back surface 5a of the antenna element casing portion 5; Details Thus, a feeding point not shown in the figure provided in the antenna element, and a central conductor and an external conductor on the other end side of the output terminal portion 11 are formed inside the casings 2 and 12. It is electrically connected in the space by connecting means that will be described in detail later, and is configured to output a signal received by the antenna element from the output terminal portion 11.

The antenna mounting bracket 50 provided in the antenna device 1 of the present invention can be mounted not only on an antenna mast and a veranda, but also on a wall surface so that it can be mounted in various installation locations. It is configured. If the antenna mounting bracket 50 is mounted on the mounting bracket attaching portion 51 formed on the back surface 5a of the antenna element housing portion 5 as shown in FIG. 1A, the antenna device 1 for horizontally polarized wave reception is obtained. Further, as shown in FIG. 1B, if the antenna mounting bracket 50 is mounted on the mounting bracket attaching portion 52 formed on the back surface 5a of the antenna element housing portion 5, it can be used as the antenna device 1 for vertical polarization reception. It has a configuration.
Furthermore, in the antenna device 1 of the present invention, the output terminal 10 is indicated by an arrow R in FIG. 1A depending on the installation state of the antenna device 1 (horizontal polarization reception or vertical polarization reception). Further, the antenna device 1 is fixed by the fixing means 9 so as to be rotatable within a range of at least 90 ° about an axis parallel to the center line in the front-rear direction of the antenna device 1. The output terminal portion 11 can be arranged so as to protrude downward, even when receiving waves or receiving vertically polarized waves.

Here, the output terminal 10 will be described with reference to FIG. 2A and 2B are schematic configuration diagrams for explaining the output terminal 10 provided in the antenna device 1 of the present invention. FIG. 2A is an enlarged front view seen from the back side of the antenna device 1, and FIG. ) Is a side view with a part broken away, as seen from the line A-A in FIG. 8A, (c) is a bottom view with a part broken away, as seen from the line BB in FIG. It is a front view for demonstrating a movable range.
According to FIG. 2, the output terminal 10 is fixed to the support receiving portion 20 integrally formed on the back surface 5 a by the bolt body 9 provided so as to penetrate the position serving as the center of rotation of the output terminal 10. It is attached to the part (detailed later). In the embodiment of the present invention, the bolt body 9 is a rotating means of the output terminal 11, and the output terminal 10 is rotatably fixed to the back surface 5a of the antenna element housing portion 5. It is a fixing means. Further, the nut body 9 a screwed to the tip end portion of the bolt body 9 is an example of a means for preventing the bolt body 9 from coming off.
The output terminal 10 of the embodiment of the present invention is fixed to the back surface 5a so as to be rotatable within a range of at least 90 ° with the bolt body 9 as a rotation axis.

In addition to the output terminal portion 11, the terminal housing portion 12 constituting the output terminal 10 is provided with a satellite input terminal portion at a position indicated by 15 in FIG. 2, and in the internal space of the terminal housing portion 12, By providing a well-known signal mixer (not shown) that mixes the UHF band signal received by the antenna element and the intermediate frequency band signal received from the satellite input terminal, for example, obtained by the BS antenna. The mixed signal mixed by the signal mixer may be output from the output terminal unit 11.

Next, the support receiving portion 20 formed integrally with the back surface 5a of the antenna element housing portion 5 will be described in detail. 3A and 3B are schematic views for explaining the support receiving portion 20 of the antenna device 1 of the present invention. FIG. 3A is an enlarged front view of the support receiving portion 20, and FIG. 3B is a DD line in FIG. It is sectional drawing of the support receiving part 20 seen from. According to an embodiment of the present invention, the antenna element housing has an inner diameter at which the bolt body 9 provided so as to penetrate the output terminal 10 is freely inserted into the center O of the support receiving portion 20. A through hole 21 penetrating the back surface 5a of the body part 5 is formed.

Further, a long groove 22 is formed around the through hole 21 and is an opening provided so as to penetrate the back surface 5 a and is formed concentrically with an axis passing through the center point O of the through hole 21. The storage space inside the antenna element housing 5 and the internal space of the terminal housing 12 are connected via the long groove 22. The long groove 22 is formed such that an angle formed by one end portion of the long groove 22, the center O of the through hole 21 and the other end portion of the long groove 22 is larger than the rotation angle of the output terminal 10. However, in the embodiment of the present invention, the long groove 22 is formed so that the output terminal 10 is provided with the output terminal portion 11 and the satellite input terminal portion. The angle formed by the one end portion of the long groove 22, the center O of the through hole and the other end portion of the long groove is formed to be slightly larger than 180 °. Thus, by forming the long groove 22 concentrically about the axis O of the through hole 21, the support receiving portion 20 is formed with a fan-like fixing piece 23 whose front end side is surrounded by the long groove 22. The
The width of the short side of the long groove 22 is such that the connecting means for connecting the feeding point of the antenna element and the central conductor on the other end side of the output terminal portion 11 and the external conductor can be freely inserted. In addition, for example, the width may be determined so as to limit the connection means so as not to move significantly due to, for example, vibration caused by wind blowing on the antenna device 1. Even when the width of the long groove is determined in this way, since the long groove 22 is formed concentrically with the axis passing through the center point O of the through hole 21, the connecting means that swings with the rotation of the output terminal 10 is the long groove. Therefore, the output terminal 10 is not obstructed by the smooth rotation.

The protrusions 5b and 5b formed integrally with the back surface 5a in the vicinity of the end portion of the long groove 22 are applied by swinging pieces formed inside the terminal housing 12 described later. It is a contact piece provided to limit the rotation range of the output terminal 10 (90 ° in the embodiment of the present invention).

Further, a wall body is provided around the long groove 22 so as to surround the through hole 21 and the long groove 22, and is disposed concentrically with the axis O of the through hole 21 and is mutually predetermined. A double projecting wall composed of an inner projecting wall 24 and an outer projecting wall 25 is formed so as to be separated from each other. In addition, an uneven means 27 is formed on the bottom surface between the inner projecting wall 24 and the outer projecting wall 25 of the double projecting wall so as to have a predetermined spacing.
In the embodiment of the present invention, in addition to the double projecting walls, a third projecting wall 26 disposed concentrically with the axis O of the through hole 21 is provided outside the outer projecting wall 25. It has been. The third projecting wall 26 has two drain grooves 26c formed so as to cut out a part of the projecting wall, and each of the maximum positions in the rotation range of the output terminal 10 (see FIG. 3 and the horizontal direction).

Further, a reinforcing plate 6 having at least the same size as the projection surface of the area surrounded by the projecting wall is provided on the inner surface of the rear surface 5a of the antenna element casing 5 so as to be along the inner surface of the rear surface 5a. Yes. The reinforcing plate 6 is formed concentrically with an axis passing through the center O of the through hole 21, and has a female screw portion 7 a that is screwed into a male screw portion formed on the bolt body 9. The screw hole 7 and the through-hole 8 corresponding to the shape of the long groove 22 are formed.
The through hole 21 and the screw hole 7 constitute a fixing portion 29 for fixing a bolt body 9 for rotatably attaching the output terminal 10 to the antenna element housing portion 5. The fixing portion 29, the double projecting walls 24 and 25, the third projecting wall 26, and the uneven means 27 constitute the support receiving portion 20 according to the embodiment of the present invention. In this embodiment, the example in which the support receiving portion 20 includes the third projecting wall 26 is shown, but the third projecting wall 26 may be omitted. In this case, the drain groove 26a may be formed in the outer protruding wall 25 of the double protruding walls.

Next, the output terminal 10 will be described in more detail with reference to FIG. 4A and 4B are schematic diagrams for explaining the output terminal 10 of the antenna device 1 according to the present invention. FIG. 4A is a front view of the output terminal 10, FIG. 4B is a rear view of the output terminal 10, and FIG. It is sectional drawing of the output terminal 10 seen from the EE line | wire in b). According to FIG. 4, the output terminal 10 according to the embodiment of the present invention is formed of a resin material or the like and is provided along the back surface 5 a of the antenna element casing 5, on the antenna element casing 5 side. A terminal housing 12 molded from a synthetic resin material or the like so as to have an internal space 18 in which an open portion is formed, and an F-type terminal supported by the terminal housing 12, and at least the central conductor 11 b And an output terminal portion 11 provided with a detachable end 11a on one end side of which a coaxial cable terminal is attached and detached, formed from a cylindrical plug seat having an outer conductor 11c provided concentrically with the central conductor 11b. Thus, the output terminal portion 11 is supported by the terminal housing portion 12 so that the detachable end 11 a protrudes outward from the terminal housing portion 12.

In addition, an insertion hole 19 through which the bolt body 9 is inserted is formed substantially at the center of the terminal housing portion 12, and the bolt body is formed concentrically with the axis of the insertion hole 19. 9 is integrally formed, and the output terminal 10 rotates with an axis passing through the center of the insertion hole 19 as a rotation axis. Further, the terminal housing portion 12 is a wall projecting so as to surround the open portion of the terminal housing portion 12, and is disposed concentrically with the central axis of the insertion hole 19. A protective wall portion 30 is formed which includes double protective walls 35 and 36 provided so as to be separated from each other by a distance of 35 mm, and convex and concave means 35 a formed at the tip of the inner protective wall 35 of the protective wall. . And in embodiment of this invention, as shown in FIG.4 (c), the front-end | tip of the said storage wall 17 and the front-end | tip of the said protective wall part 30 are formed so that it may be located on substantially the same plane.
The protrusions 15a formed on the plane located on the back side of the terminal housing part 12 and inside the inner protective wall 35 are applied to the contact pieces 5b and 5b formed on the support receiving part 20. By It is a rocking piece for limiting the rotation range of the output terminal 10 (90 ° in the embodiment of the present invention). Further, what is indicated by 36 c in FIG. 4 is a water drain groove of the outer protective wall 36 formed at a position parallel to the protruding direction of the output terminal portion 11. Reference numeral 13 denotes a stop piece for controlling the rotation of the output terminal portion 11, and reference numeral 14 denotes a shaft of the output terminal portion 11 so as to surround the output terminal portion 11. This is a water draining cylinder formed concentrically with the heart.

Here, the fitting state of the support receiving portion 20 and the output terminal 10 will be described in detail with reference to FIG. FIGS. 5A and 5B are views for explaining a fitting state of the support receiving portion 20 and the output terminal 10 in the antenna device 1 of the present invention, where FIG. 5A is an exploded view, and FIG. 5B is a partial view showing the fitting state. FIG.
The method of assembling the output terminal 10 to the support receiving part 20 formed on the back surface 5a of the antenna element housing part 5 is to insert the bolt body 9 from the insertion hole 19 formed in the terminal housing part 12, The bolt body 9 is screwed into the fixing portion 29 provided in the support receiving portion 20, that is, the female screw portion 7a of the screw hole 7 of the reinforcing plate 6 provided along the inner surface of the back surface 5a. Is done. When screwing of the bolt body 9 is completed, for example, a nut body 9a is fixed to the tip of the bolt body 9, so that the bolt body 9 can be fixed to the fixing portion 29 even if the bolt body 9 is loosened. There will be no departure. Further, if the bolt body 9 is fastened to the fixing portion 29, the output terminal 11 can be firmly fixed to the back surface 5a. At this time, the terminal housing 12 is formed so that the tip of the receiving wall 17 and the tip of the protective wall 30 are located on substantially the same plane. The back surface 5a and the open end of the output terminal 10 abut. However, due to the presence of the reinforcing plate 6 and the accommodating wall 17, even if the bolt body 9 is tightened, the support receiving portion 20 (specifically, the fixing piece 23) does not bend, and the protective wall portion 30 is not bent. The tip surface does not leave the back surface 5a.

Next, the fitting state of the support receiving portion 20 and the output terminal 10 will be described. According to FIG. 5B, when the output terminal 10 is fixed to the support receiving part 20, the inner protective wall 35 of the protective wall part 30 provided in the terminal housing part 12 is 20 is inserted between the inner projecting wall 24 and the outer projecting wall 25, and the convex / concave means 35 a formed at the tip of the inner protective wall 35 is provided between the inner projecting wall 24 and the outer projecting wall 25. The outer protective wall 36, which is fitted to the uneven means 27 formed on the bottom surface between them and is provided in the terminal housing portion 12, has an inner peripheral surface 36a thereof It is disposed so as to be in sliding contact with the outer peripheral surface 26a of the third protruding wall 26 provided outside the protruding walls 24, 25. The projecting dimensions of the inner projecting wall 24, the outer projecting wall 25, and the third projecting wall 26 are such that the open end of the output terminal 10 contacts the back surface 5a in a state where the output terminal 11 is fixed to the back surface 5a. , The height is slightly shorter than the protruding dimension of the protective walls 35 and 36.
In the case where there is no third projecting wall 26, the inner peripheral surface 36a of the outer protective wall 36 and the outer peripheral surface of the outer projecting wall 25 may be configured to be in sliding contact.

In this way, the output terminal 10 is fixed to the support receiving portion 20 formed on the back surface 5a so as to be rotatable within a range of at least 90 °. Whether receiving radio waves coming in or receiving radio waves sent in vertically polarized waves, the bolt body 9 as a fixing means can be always placed in a downward direction simply by performing a simple loosening operation. Thus, the coaxial cable connected to the attachment / detachment end 11a of the output terminal portion 11 can be drawn downward regardless of the received polarization, and if the well-known waterproof cup is attached to the waterproof cylinder 14, the attachment / detachment is performed. Since the connection portion between the end 11a and the coaxial cable can be protected from rainwater or the like, an extremely reliable antenna device can be provided.

Further, with the output terminal 11 fixed to the back surface 5a, at least the tip of the outer protective wall 36 of the protective wall portion 30 of the open end of the terminal housing portion 12 abuts the back surface 5a, and the outer side Since the inner peripheral surface 36a of the protective wall 36 and the outer peripheral surface 26a of the third protruding wall 26 disposed on the outermost side are in sliding contact with each other, for example, rainwater sprayed on the output terminal 10 or the back surface 5a is transmitted. Even if there are water droplets reaching the output terminal 10, it is difficult for the rainwater or water droplets to enter the output terminal 10. Even if rainwater enters beyond the sliding contact surface between the inner peripheral surface 36a of the outer protective wall 36 and the outer peripheral surface of the third projecting wall 26 disposed on the outermost side due to a capillary phenomenon or the like, Due to gravity or capillary action, the water escapes from the drain groove 36c located below the output terminal 10 along the sliding contact surface.
Further, even if the sliding surface contacts the inside of the third projecting wall 26 beyond the third projecting wall 26, the space 28 formed between the third projecting wall 26 and the outer projecting wall 25 may cause further water drops. In addition to preventing intrusion, the water droplets travel along the outer peripheral surface of the outer protruding wall 25 of the double protruding walls and from the drain groove 26c formed at a position below the support receiving portion 20 to the output terminal 10. Since it comes out through the water draining groove 36c formed at a position below the. It has a highly reliable configuration.

In addition, the output terminal 10 is always subjected only to the downward pulling force by the coaxial cable connected to the detachable end 11a. For example, when a strong wind blows or stops on the coaxial cable, As the cable swings, a force to rotate the output terminal 10 is applied to the output terminal 10. Therefore, in the present invention, with the output terminal 10 fixed to the back surface 5a, the bottom surface between the convex / concave means 35a, the inner projecting wall 24 and the outer projecting wall 25 formed at the tip of the inner protective wall 35 is provided. By forming the concavo-convex means 27 so as to be fitted to each other, the output terminal 10 maintains its state even if momentary force due to the coaxial cable is continuously applied to the output terminal 10. Since the bolt body 9 does not loosen, the output terminal 10 always maintains a predetermined position. Further, even if the bolt body 9 is slightly loosened, the output terminal 10 can maintain the arrangement direction by the uneven fitting.

In addition, the position at which the uneven means 35a and the uneven means 27 are fitted is determined by the contact surface between the front end of the outer protective wall 36 and the rear surface 5a of the protective wall 30 and the inner peripheral surface of the outer protective wall 36. 36a and the outer surface 26a of the third projecting wall 26, and the space 28 formed between the third projecting wall 26 and the outer projecting wall 25. Even if there is a gap generated in the fitting portion between the uneven means 35a and the uneven means 27, water can infiltrate from the fitting portion by being provided inside the double protruding wall that exceeds the above. No waterproofing performance can be maintained for long-term use.

The fitting state between the support receiving portion 20 and the output terminal 10 has been described above. From now on, a more specific assembly procedure will be described. FIG. 6 is a diagram for explaining a specific assembled state of the support receiving portion 20 and the output terminal 10 in the antenna device 1 of the present invention. (The drawing of the output terminal 10 is a cross-sectional view taken along line CC in FIG. 2A.)
As shown well in FIG. 6, the output terminal portion 11 supported by the terminal housing portion 12 so that the detachable end 11 a protrudes outward is located in the internal space 18 of the terminal housing portion 12. The central conductor on one side of the coaxial cable 3 cut to a predetermined length and the external conductor are connected to the central conductor 11b and the external conductor 11c on the other end side of the detachable end 11a by soldering or the like. In order to attach the output terminal 10 to which the coaxial cable 3 is connected to the support receiving portion 20, the other end side of the coaxial cable 3 is inserted from the front side of the long groove 22 formed in the support receiving portion 20 to the inside. Thereafter, the bolt body 9 is screwed into the fixing portion 29 of the support receiving portion 20.
Next, when the support receiving portion 20 and the output terminal 10 are attached, an intermediate position separated from the one side of the coaxial cable 3 by a predetermined dimension protrudes from the inner surface of the back surface 5a of the antenna element housing portion 5. The support arm 3a formed to support is fixed. At this time, the intermediate position is determined so that the coaxial cable 3 existing between the connection portion with the output terminal portion 11 and the intermediate position bends gently. Furthermore, the assembly is completed by connecting the other end side of the coaxial cable 3 and the feeding portion of the antenna element (not shown).

In the output terminal 10 assembled in this way, the swing piece 15a formed on the output terminal 10 abuts against the abutting pieces 5b and 5b formed on the support receiving portion 20 as described above. In other words, in the embodiment of the present invention, the rotation is fixed within a range of 90 °. The coaxial cable 3 has a predetermined length and is supported by the support arm portion 3a so that the coaxial cable 3 existing between the connection portion with the output terminal portion 11 and the intermediate position is gently bent. Since it is fixed, when the output terminal 10 is rotated, the coaxial cable 3 can be swung along the long groove 22 with the support arm 3a as a fulcrum. Moreover, even if the coaxial cable swings as the output terminal 10 rotates, the connection between the one end of the coaxial cable 3 and the output terminal 11 and the other end of the coaxial cable 3 Since an extra load is not applied to the connection portion of the antenna element with the feeding point, high reliability can be maintained even if the output terminal 10 is rotatable as in the embodiment of the present invention. it can.
In addition, if the width of the short side of the long groove 22 is formed so as to allow the connecting means 3 to be freely inserted, the connecting means may be used as the connecting means due to vibrations caused by wind blowing on the antenna device 1. However, the long groove 22 should be formed concentrically with the axis of the fixing portion 29 even if there is such a limitation. Thus, the smooth swing of the coaxial cable 3 accompanying the rotation of the output terminal 10 is not hindered.
Note that the coaxial cable 3 is disposed so as to be gently bent and is located at least between the connection portion between the center conductor 11b and the outer conductor 11c of the output terminal portion 11 and the intermediate position fixed to the support arm portion 3a. Is one of the embodiments of the swingable connecting means described in the claims.

Next, different embodiments of the support receiving portion will be described with reference to FIG. FIG. 7 is an embodiment of the support receiving portion 200 of the antenna device 1 of the present invention, (a) is an enlarged front view of the support receiving portion 200, and (b) is a support viewed from the FF line in (a). It is sectional drawing of the receiving part. The difference between the second embodiment and the first embodiment is the structure of the fixing portion 29 of the support receiving portion 200.
According to FIG. 7, instead of the reinforcing plate 6 formed with the screw holes 7 constituting the fixing portion 29 attached to the inner surface side of the back surface 5a in the first embodiment, the back surface portion of the fixing piece 23 is used. Further, a fixing body 70 having a female thread portion 70a for screwing the bolt body 9 is attached. In other words, the fixing portion 29 in the second embodiment is configured by the fixing body 70 attached to the through hole 21 and the back surface portion of the fixing piece 23.

According to the second embodiment, as in the first embodiment, due to the presence of the accommodating wall 17, the fixing piece 23 does not bend even if the bolt body 9 is tightened, but the output terminal 10 is connected to the axis of the bolt body 9. When a tensile force is applied in the outward direction along the line, the fixing piece 23 is slightly bent together with the fixing body 70 as shown by the arrow in FIG. 7B. Therefore, the fixing piece 23 is used as a biasing means. can do.
That is, when the output terminal 10 is rotated by 90 ° from the state where the output terminal 10 is fixed to the fixing portion 29 provided in the antenna element housing portion 5a by the fixing means, the bolt body 9 is not greatly loosened, that is, If the bolt body 9 is slightly loosened so that the open end of the output terminal 10 (specifically, the tip of the outer protective wall 36, the tip of the receiving wall 17) and the back surface 5a of the antenna element housing part 5 are in sliding contact with each other. Since the contact state between the open end of the output terminal 10 and the back surface 5a is opened, if the output terminal 11 is rotated in this state, the protective wall portion 30 is bent while the fixing piece 23 is bent. The fitting means is released so that the uneven means 35a gets over the uneven means 27 of the support receiving part 20, and the uneven means 35a of the protective wall part 30 gets over the uneven means 27 of the support receiving part 20. The output in the state If stopping the rotation of the child 10, the uneven section 35a by the biasing force of the fixing piece 23 is to fit as attracted to the uneven section 27 side. In order to increase the urging force of the fixing piece 23, the fixing piece 23 may be provided to be slightly inclined inward.
That is, according to the second embodiment, when the output terminal 10 is turned, the bolt body 9 as the fixing means is greatly loosened until the fitting state between the uneven means 35a and the uneven means 27 is released. Even if the bolt body 9 is slightly loosened, not only can the fitting state of the uneven means 35a and the uneven means 27 be maintained, but also the bolt body 9 can be tightened easily. Even if the bolt body 9 is slightly loosened, the direction of arrangement of the output terminal 10 can be maintained by the fitting of the fixing piece 23 and the unevenness as this biasing means.

It should be noted that the present invention can be implemented by appropriately changing the configuration of each part without departing from the spirit of the present invention as described below.
In the above embodiment, the uneven means 27 disposed on the bottom surface between the inner projecting wall 24 and the outer projecting wall 25 formed on the support receiving portion 20, and the inner side of the protective wall portion 30 formed on the output terminal 10. Although the example in which the uneven means 35a formed at the front end portion of the protective wall 35 is fitted is shown, as described above, the fitting position between the uneven means and the uneven means is waterproof in the embodiment of the present invention. Since it is provided at a position that does not affect the performance, the uneven means 35a and the uneven means 27 may be omitted, and even in such an embodiment, good waterproof performance is not impaired.
Further, since the uneven means 35a and the uneven means 27 are not fitted, it is not necessary to release the fitted state between the uneven means 35a and the uneven means 27 when the output terminal 10 is rotated. Since it is only necessary to slightly loosen without loosening, the operation can be performed easily and smoothly, and the bolt body 9 can be easily tightened after the arrangement of the output terminals 10 is determined.

DESCRIPTION OF SYMBOLS 1 ... Antenna apparatus, 2 ... Antenna main body, 3 ... Coaxial cable, 3a ... Support arm part, 5 ... Antenna element housing | casing part, 5a ... Back surface, 5b ... Contact piece, 5c ... Reinforcement rib, 6 ... Reinforcement plate, 7 DESCRIPTION OF SYMBOLS ... Screw hole, 7a ... Female screw part, 8 ... Through-hole, 9 ... Bolt body, 9a ... Nut body, 10 ... Output terminal, 11 ... Output terminal part, 11a ... Removable end, 11b ... Center conductor, 11c ... External conductor , 11d ... nut, 12 ... terminal housing part, 13 ... stop piece, 14 ... waterproof cylinder, 15 ... swing piece, 17 ... receiving wall, 18 ... space, 19 ... insertion hole, 20 ... support receiving part, 21 ... Through hole, 22 ... long groove, 23 ... fixing piece, 24 ... inner protruding wall, 25 ... outer protruding wall, 26 ... third protruding wall, 26c ... draining groove, 27 ... uneven means, 28 ... space, 29 ... fixing portion , 30 ... protective wall part, 35 ... inner protective wall part, 35a ... uneven means, 36 ... outer protective wall part, 36 ... drain groove, 50 ... antenna mounting bracket, 51, 52 ... mounting bracket affixed portion, 70 ... fixing member, 70a ... female screw portion, 200 ... support receiving portion.

Claims (6)

An antenna element; an output terminal comprising a cylindrical connector seat having a center conductor and an outer conductor concentrically provided with the center conductor; and a housing for housing the antenna element and supporting the output terminal The antenna element is electrically connected to the feeding point provided in the antenna element by the connecting means in the space formed inside the casing, and the center conductor and the outer conductor of the output terminal. In an antenna device configured to output a signal received by an element from the output terminal,
The output terminal comprises an output terminal portion provided with an attachment / detachment end to / from which a coaxial cable terminal is attached / detached at least on one end side, and at least 90 with an axis parallel to the center line in the front-rear direction of the antenna device as a rotation axis It is fixed by fixing means so that it can rotate within the range of °,
In addition, the output terminal can be arranged so that at least the output terminal portion protrudes downward from the horizontal direction in a state where the antenna device is installed on an attachment target, and a plane including the axis of the output terminal portion is provided. Rotating within a range of a position substantially parallel to the horizontal direction from a position substantially parallel to a plane perpendicular to the horizontal direction and including at least the center line in the front-rear direction of the antenna device An antenna device characterized by being configured.
The housing is provided along an antenna element housing portion having a housing space for supporting the antenna element therein and a back surface of the antenna element housing portion, and is formed inside the antenna element housing portion. And an internal space in which an open portion is formed on the antenna element housing portion side, which is connected through an opening provided so as to penetrate a part of the back surface of the antenna element housing portion. Consisting of a terminal housing,
The output terminal is configured such that at least the output terminal portion is supported by the terminal housing portion so that the removable end protrudes outside,
In addition, the output terminal can be rotated by the fixing means with respect to a fixing portion provided on the back surface of the antenna element housing portion, with an axis parallel to the center line in the front-rear direction of the antenna device as a rotation axis. The central conductor and the external conductor on the other end side of the output terminal portion that are fixed and located in the internal space of the terminal housing portion, and the feeding point provided in the antenna element are connected via the opening. The antenna device according to claim 1, wherein the antenna devices are connected to each other by connecting means capable of swinging.
The opening has a length corresponding to the swing range of the connecting means that swings as the output terminal rotates, and is formed of a long groove formed concentrically with the axis of the fixing portion. The antenna device according to claim 2, wherein the antenna device is characterized.
On the back surface of the antenna element housing portion, a wall body is provided so as to surround the fixing portion and the long groove, and is disposed concentrically with the axis of the fixing portion and spaced apart from each other by a predetermined distance. A support receiving portion is formed which includes a double projecting wall provided in the manner described above, and uneven means formed on the bottom surface between the inner projecting wall and the outer projecting wall of the double projecting wall,
Further, the terminal housing part is a wall projecting so as to surround the open part of the internal space in the terminal housing part, and is disposed concentrically with the rotation axis of the terminal housing part, A protective wall portion is formed which includes a double protective wall provided so as to be separated from each other by a predetermined distance, and uneven means formed at the tip of the inner protective wall of the double protective wall. ,
When the terminal housing part is fixed to the fixing part of the antenna element housing part so as to be rotatable by the fixing means,
The inner protective wall of the terminal housing portion is inserted between the inner protruding wall and the outer protruding wall of the support receiving portion, and the uneven means formed at the tip of the inner protective wall includes the inner protruding wall. The concave and convex means formed on the bottom surface between the wall and the outer projecting wall are mutually fitted, and the outer protective wall is disposed outside the outer projecting wall. The antenna device according to any one of claims 2 to 3.
Furthermore, the support receiving portion is provided with a third protruding wall disposed concentrically with the axis of the fixing portion outside the double protruding wall,
When the terminal housing part is fixed to the fixing part of the antenna element housing part so as to be rotatable by the fixing means,
The inner protective wall of the terminal housing portion is inserted between the inner protruding wall and the outer protruding wall of the support receiving portion, and the uneven means formed at the tip of the inner protective wall includes the inner protruding wall. Fitting with the concavo-convex means formed on the bottom surface between the wall and the outer protruding wall, and the outer peripheral surface of the third protruding wall and the inner peripheral surface of the outer protective wall are in sliding contact, and at least The antenna device according to claim 4, wherein the antenna device is disposed so that a front end surface of the outer protective wall and a rear surface of the antenna element housing portion are in contact with each other.
The length of the long groove is such that the angle formed by the terminal portion on one side of the long groove, the center of the fixing portion, and the terminal portion on the other side of the long groove is larger than the rotation angle of the terminal housing portion. By providing the support receiving part with a fan-shaped fixing piece centered on the axis of the fixing part and having a distal end surrounded by the long groove,
In a state where the output terminal is assembled to the fixed portion of the antenna element casing so that the output terminal is in sliding contact with the back surface of the antenna element casing.
When the output terminal is rotated, the fixing piece is bent outwardly of the antenna element housing portion, and the convex / concave means of the protective wall portion gets over the concave / convex means of the support receiving portion. Is released,
Further, when the rotation of the output terminal is stopped in a state where the unevenness means of the protective wall has passed over the unevenness means of the support receiving portion, the unevenness means is made to be uneven by the biasing force of the fixing piece. The antenna device according to any one of claims 3 to 5, wherein the fixing piece is used as an urging means so as to be fitted so as to be attracted to the side.

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