JP2018046505A - Antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna device providing an excellent aesthetic appearance.SOLUTION: The antenna device includes: a pillar-shaped antenna body; and a connecting portion 30 attached to a bottom 22 of the body, which is a bottom surface of the antenna body. The connecting portion 30 includes: a pillar-shaped cover 31 in which a space is formed and a mast insertion opening 32 for inserting a mast is formed in a bottom surface 36; and at least one fixing metal fitting 35 installed inside the cover 31 and configured to fix the mast.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a columnar antenna device used by being fixed to a mast.

  As a columnar antenna device used by being fixed to a mast, there is an antenna device described in Patent Document 1. In the antenna device described in Patent Document 1, an antenna mounting column is housed in the antenna cover so that the lower end portion protrudes, and the antenna mounting column protruding from the antenna cover is fixed to the mast with a mounting bracket. .

Japanese Patent No. 5143753

  In general, an antenna device installed in a house places importance not only on performance but also on aesthetics. However, the antenna device described in Patent Literature 1 exposes the mounting bracket that fixes the antenna mounting column to the mast, which impairs the aesthetic appearance.

  The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide an antenna device that gives an excellent aesthetic appearance.

  The invention according to claim 1 is an antenna device that is used by being fixed to a mast, and includes a columnar antenna main body portion and a connection portion attached to a bottom surface of the main body portion that is a bottom surface of the antenna main body portion. The connecting portion is provided with a column-shaped cover portion in which a space is formed and a mast insertion port for inserting the mast is formed on a bottom surface; And at least one fixture that is configured to be fixed.

  Invention of Claim 2 is the antenna apparatus of Claim 1, Comprising: The said cover part is comprised so that the center axis | shaft of the said antenna main-body part and the center axis | shaft of the said cover part may correspond. The fixing bracket is configured to fix the mast at a position where a central axis of the antenna main body portion and a central axis of the mast coincide with each other.

  Invention of Claim 3 is the antenna apparatus of Claim 1 or 2, Comprising: The said antenna main-body part is provided with the output connector provided so that it might protrude from the said main-body-part bottom face to the inside of the said cover part. It is characterized by having.

  Invention of Claim 4 is the antenna apparatus of Claim 3, Comprising: The said cover part is divided | segmented by the surface parallel to the column-shaped central axis of the said cover part, and two cover members formed And one of the cover members is attached to the other cover member so as to be openable and closable.

  Invention of Claim 5 is the antenna apparatus of Claim 4, Comprising: The said connection part surrounds the said output connector which protruded from the said main-body part bottom surface inside the said cover part, and the said output connector A partition member configured to partition a surrounding space and a space in the cover portion, each of the cover members forming the small chamber portion when the cover member is closed; The partition member is formed with a cable insertion port for inserting a cable connected to the output connector into the small chamber portion.

  Invention of Claim 6 is an antenna apparatus of any one of Claims 1-5, Comprising: The said mast is formed in the column shape, The outside of a plurality of said masts as said fixing metal fitting A plurality of fixtures having the same central axis and different inner diameters are provided so as to correspond to the diameter.

  According to a seventh aspect of the present invention, there is provided a column-shaped antenna main body, a cylindrical connection portion attached to a bottom surface of the main body, which is a bottom surface of the antenna main body, and having a cylindrical fixing bracket inside, and the fixing Attached to a cable that passes through the mast, a cylindrical mast configured to fit the end of the bracket, an output connector that protrudes from the bottom of the main body into the fixed bracket, and the inside of the mast And a connection connector fixed to the tip portion of the mast, and the output connector and the connection connector are configured to be connected with the fitting between the fixing bracket and the tip portion of the mast. It is characterized by being.

  Invention of Claim 8 is an antenna apparatus of any one of Claims 1-7, Comprising: The said antenna main-body part is formed in the column shape, The said connection part is the said antenna main body It is characterized by being formed in a columnar shape having the same central axis and the same outer diameter as the portion.

  According to the first aspect of the present invention, the fixing bracket for fixing the mast is hidden inside the cover portion. Therefore, since the fixing bracket is not exposed, the appearance is simple and an excellent aesthetic appearance can be given.

  According to the second aspect of the present invention, the central axis of the antenna main body part, the central axis of the cover part, and the central axis of the mast coincide with each other, so that a simpler appearance and a better aesthetic appearance can be given.

  According to the third aspect of the present invention, not only the fixing bracket but also the output connector for connecting the cable is provided in the cover portion, and the output connector is not exposed. Therefore, a better aesthetic appearance can be given.

  According to the invention described in claim 4, the cover portion is composed of two cover members, and the mast is fixed to the fixing bracket or the cable is connected to the output connector with the two cover members opened. It is easy to work.

  According to the invention described in claim 5, when the two cover members are opened, the mast is fixed by the fixing bracket, the cable is connected to the output connector, and then the two cover members are closed, the periphery of the output connector is small. Surrounded by the room. Thereby, since the waterproof performance of an output connector improves, even if water permeates into a connection part, it can control that an output connector in a small room part gets wet. As a result, the waterproof cap which covers an output connector can be made unnecessary.

According to the invention described in claim 6, it is possible to select a mast that fixes the antenna device from a plurality of types of masts having different outer diameters, and to fix the selected mast to the connection portion.
According to the invention of claim 7, the antenna main body and the mast can be mechanically connected by simply fitting the fixing bracket and the tip of the mast, and the antenna main body and the cable can be connected. Can be electrically connected. At that time, since the cable passes through the mast, it has a simpler appearance and a better aesthetic appearance. Furthermore, since it becomes difficult to receive the restriction | limiting of a cable when rotating an antenna main-body part, it is easy to adjust the direction of an antenna main-body part.

  According to the eighth aspect of the present invention, the outer surface of the antenna main body and the outer surface of the connecting portion are flush with each other, so that a simpler appearance and a better aesthetic appearance can be given.

It is a figure which shows the external appearance of the antenna apparatus fixed to the mast. It is a perspective view which shows the inside of the connection part which concerns on 1st Embodiment. It is a front view which shows the inside of the connection part which concerns on 1st Embodiment. It is a perspective view which shows the inside of the connection part which concerns on 2nd Embodiment. In 2nd Embodiment, it is a front view which shows the inside of the connection part to which the thin mast was fixed. In 2nd Embodiment, it is a front view which shows the inside of the connection part to which the thick mast was fixed. It is the VII-VII sectional view taken on the line in FIG. It is the VIII-VIII sectional view taken on the line in FIG. It is a perspective view which shows the connection part of the antenna device which concerns on 3rd Embodiment, and the inside of a mast. In 3rd Embodiment, it is a perspective view which shows the inside of the connection part which fixed the mast. It is sectional drawing which shows the inside of the antenna output connector and antenna connection connector which concern on 3rd Embodiment. It is sectional drawing of the mast with which the fixing metal fitting and C ring which concern on 3rd Embodiment were attached to the outer surface. It is sectional drawing of the mast with which the O-ring which concerns on 3rd Embodiment was attached to the outer surface. In 3rd Embodiment, it is a figure which shows the external appearance of C ring attached to the outer surface of a mast. It is the XV-XV sectional view taken on the line in FIG. In 3rd Embodiment, it is a figure which shows the cross section of the O-ring attached to the outer surface of a mast. In 3rd Embodiment, it is a figure which shows a mode that a fixing metal fitting and the front-end | tip part of a mast are fitted. In 3rd Embodiment, it is sectional drawing which shows the state which C ring fitted to the fixture. It is a figure which shows the external appearance of the antenna apparatus fixed to the mast which concerns on other embodiment.

Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings.
(First embodiment)
[1. overall structure]
An appearance of the antenna device 10 according to the first embodiment is shown in FIG. The antenna device 10 includes an antenna main body portion 20 and a connection portion 30 and is used by being fixed to a mast 70. The antenna device 10 is, for example, a UHF antenna for receiving digital terrestrial broadcasting. Here, the direction parallel to the central axis L of the antenna device 10 is defined as the vertical direction. The side connected to the mast 70 of the antenna device 10 is the rear end side or the lower side, and the opposite side of the rear end side is the front end side or the upper side.

  The mast 70 is a cylindrical rod formed of metal. The mast 70 is installed on the roof of the house or the wall of the house with a support fitting, or the rear end portion is buried in the ground. And the connection part 30 is fixed to the front-end | tip part of the mast 70 installed in the roof etc. of the house.

  The antenna main body 20 is a directional antenna formed in a cylindrical shape. Specifically, the antenna body 20 includes a cylindrical antenna cover made of resin and an antenna element installed inside the antenna cover. On the outer surface of the antenna body 20, a mark 21 indicating that it is the front of the antenna device 10 is drawn. The front surface of the antenna device 10 is the directionality of the antenna device 10. The mark 21 is not limited to paint, but may be anything as long as it can be distinguished, such as unevenness. The mark 21 may be provided on the outer surface of the connection portion 30.

  The connecting portion 30 is formed in a cylindrical shape whose central axis coincides with the central axis L of the antenna body 20 and whose outer diameter coincides with the outer diameter of the antenna body 20. A space is formed inside the connection part 30. The connecting portion 30 is attached to the bottom surface 22 of the main body so that the cylindrical upper surface 37 contacts the bottom surface 22 of the main body that is the bottom surface of the antenna main body 20. The matching here is not limited to a strict matching, but is a matching if it can be regarded as matching even if there is a slight deviation. The same applies to the following.

[2. Connection configuration]
Next, a detailed configuration of the connection unit 30 will be described. As shown in FIGS. 2 and 3, the connection part 30 includes a cover part 31 and a fixing bracket 35.

  The cover part 31 has two cover members 31a and 31b formed by dividing a cylindrical shape by a plane parallel to the central axis L, that is, two semi-cylindrical cover members 31a and 31b. The divided surfaces obtained by dividing the columnar shape are the opening surfaces of the cover members 31a and 31b. The cover members 31a and 31b are made of resin. The end of the cover member 31b in the longitudinal direction is attached to the end of the cover member 31a in the longitudinal direction via a hinge 34. That is, the cover member 31b is attached to the cover member 31a so as to be freely opened and closed. Here, a direction parallel to the opening surface of the cover member 31a and perpendicular to the central axis L is a left-right direction, and a direction perpendicular to the opening surface of the cover member 31a is a front-rear direction. The cover member 31a side is the rear side, the cover member 31b side is the front side, the left side of the drawing is the left side as it is, and the right side of the drawing is the right side as it is.

  The cover member 31a includes a semi-cylindrical side surface 38a, a semi-circular bottom surface 36a, and a semi-circular upper surface 37a. Similarly, the cover member 31b includes a semi-cylindrical side surface 38b, a semi-circular bottom surface 36b, and a semi-circular upper surface 37b. The side surface 38 a is integrally formed with the antenna cover of the antenna body 20. Further, the cover member 31a includes a rectangular floor surface 39 therein. The floor surface 39 is fitted in parallel to the opening surface of the cover member 31a.

  When the cover members 31a and 31b are closed, the side surface 38a and the side surface 38b are combined to form the side surface of the cylindrical cover portion 31. When the cover members 31a and 31b are closed, the bottom surface 36a and the bottom surface 36b are combined to form the bottom surface 36 of the cover portion 31, and the top surface 37a and the top surface 37b are combined to form the top surface 37 of the cover portion 31.

  A semicircular cutout 32a centered on the central axis L is formed on the bottom surface 36a of the cover member 31a. The diameter of the notch 32 a is slightly larger than the outer diameter of the mast 70. Similarly, a semicircular cutout portion 32b having the same size as the cutout portion 32a centering on the central axis L is formed on the bottom surface 36b of the cover member 31b. Thereby, when the cover members 31a and 31b are closed, the notch 32a and the notch 32b are combined, and a mast insertion port 32 for inserting the mast 70 is formed on the bottom surface 36 of the cover 31.

  Further, semicircular cutout portions 33a are formed on the bottom surface 36a of the cover member 31a on the left and right sides of the cutout portion 32a. The diameter of the notch 33 a is slightly larger than the outer diameter of the coaxial cable 80. Similarly, a semicircular cutout portion 33b having the same size as the cutout portion 33a is formed on the left and right sides of the cutout portion 32b on the bottom surface 36b of the cover member 31b. Thus, when the cover members 31a and 31 are closed, the notch 33a and the notch 33b are combined, and two cable insertion ports 33 for inserting the coaxial cable 80 are formed on the bottom surface 36 of the cover 31. . The coaxial cable 80 is a cable for transmitting a reception signal received by the antenna body 20.

  In addition, the diameter of the mast insertion port 32 may be formed sufficiently larger than the diameter of the mast 70, and the coaxial cable 80 may be inserted together with the mast 70 from the mast insertion port 32. In this case, the cable insertion port 33 may not be formed on the bottom surface 36.

[3. Waterproof structure]
The cover member 31 a includes a box-shaped partition member 40 a having an open front surface on the floor surface 39. The partition member 40 a is formed on the right side and the left side of the upper part of the cover member 31 a so as to surround the rear half of the two output connectors 25 protruding into the cover portion 31. The output connector 25 is a cylindrical F-type connector that outputs a reception signal received by the antenna main body 20, and is provided so as to protrude rearward from the main body bottom surface 22 of the antenna main body 20. A coaxial cable 80 is connected to the output connector 25.

  The partition member 40a is formed by four partition surfaces 41a to 44a that are box-shaped side surfaces and a partition surface 47a that is a box-shaped rear surface. Among these, the partition surface 42a is a part of the upper surface 37a, and the partition surface 43a is a part of the side surface 38a. The partition surface 47 a is a part of the floor surface 39. The partition surface 41a is a surface facing the partition surface 43a, and the partition surface 44a is a surface facing the partition surface 42a.

  A semicircular cutout 46a is formed in the partition surface 42a. The diameter of the notch 46 a is slightly larger than the outer diameter of the output connector 25, and the notch 46 a contacts the rear half of the output connector 25. The partition surface 44a is formed with a semicircular cutout 45a. The diameter of the notch 45 a is slightly larger than the outer diameter of the coaxial cable 80.

  On the other hand, the cover member 31b includes a box-shaped partition member 40b having an open rear surface. The opening of the partition member 40b is formed in the same size as the opening of the partition member 40a. The partition member 40b is formed on the right and left sides of the upper portion of the cover member 31b so as to surround the front half of the output connector 25 when the cover members 31a and 31b are closed.

  The partition member 40b is formed by four partition surfaces 41b to 44b that are box-shaped side surfaces and a partition surface 47b that is a box-shaped front surface. Among these, the partition surface 42b is a part of the upper surface 37b, and the partition surface 43b and the partition surface 47b are a part of the side surface 38b. The partition surface 41b is a surface facing the partition surface 43b, and the partition surface 44b is a surface facing the partition surface 42b.

  The partition surface 42b is formed with a notch 46b having the same size as the notch 46a. When the cover members 31a and 31b are closed, the notch 46b contacts the front half of the output connector 25. Further, the partition surface 44b is formed with a notch 45b having the same size as the notch 45a.

  When the cover members 31a and 31b are closed, the partition member 40a and the partition member 40b are combined to form the two small chamber portions 40. Each of the small chamber portions 40 surrounds the output connector 25 and is configured to partition a space around the output connector 25 and a space in the cover portion 31. Then, on the upper surface of the small chamber formed by the partition surface 42a and the partition surface 42b, the notch 46a and the notch 46b are combined to form a connector insertion port 46 through which the output connector 25 is passed. In addition, on the bottom surface of the small chamber portion 40 formed by the partition surface 44a and the partition surface 44b, the notch portion 45a and the notch portion 45b are combined to form the cable insertion port 45.

  The coaxial cable 80 is inserted from the cable insertion port 33 formed in the bottom surface 36, drawn into the small chamber portion 40 through the cable insertion port 45, and connected to the output connector 25. In the present embodiment, two coaxial cables 80 can be connected to the output connector 25, respectively, but the number of the output connectors 25, the cable insertion ports 33, and the cable insertion ports 45 may be one or three or more. Good.

  There is no gap on the partition surface of the small chamber portion 40 other than the cable insertion port 45 and the connector insertion port, and the cable insertion port 45 and the connector insertion port are also closed by the coaxial cable 80 and the output connector 25. Therefore, even if a water droplet enters from the mast insertion port 32, adhesion of the water droplet to the output connector 25 is suppressed.

[4. securing bracket]
The fixing bracket 35 is a bracket configured to fix the connection portion 30 to the mast 70, and is provided inside the cover portion 31. In the present embodiment, as shown in FIGS. 2 and 3, two fixing brackets 35 are provided on the floor surface 39 of the cover member 31a with a predetermined interval in the vertical direction. The two fixing brackets 35 are the same type of brackets formed in the same shape.

  The fixing bracket 35 includes a first member 35a, a second member 35b, and two screws 35c. The first member 35a is a substantially semi-annular member protruding to the front side, and includes a semi-annular portion and an extending portion that extends from the end of the semi-annular portion to the left and right. The second member 35b is a substantially rectangular parallelepiped member fixed to the floor surface 39, and has a recessed portion that is recessed rearward on the front surface. The recessed portion of the second member 35b has a semicircular cross section, and non-slip irregularities are formed on the inner surface. The diameter of the semi-annular portion of the first member 35 a and the diameter of the concave portion of the second member 35 b are slightly larger than the outer diameter of the mast 70.

  When the left and right extending portions of the first member 35a are brought into contact with the front surface of the second member 35b and screwed with screws 35c, the semicircular ring portion of the first member 35a and the recess of the second member 35b are combined, A cylindrical fixing hole is formed inside. The fixing hole is an insertion hole through which the mast 70 is inserted, and the diameter of the fixing hole is slightly larger than the outer diameter of the mast 70. That is, the inner diameter of the fixing bracket 35 is slightly larger than the outer diameter of the mast 70. The central axes of the fixing holes of the two fixing brackets 35 are the same as the central axis L of the antenna body 20. Therefore, when the fixing bracket 35 is attached to the mast 70, the central axis of the mast 70 is the same as the central axis L of the antenna body 20.

  Here, a method of fixing the antenna device 10 to the mast 70 will be described. First, the cover members 31a and 31b are opened, the first member 35a is removed, and the mast 70 is fitted into the recessed portion of the second member 35b. Then, the first member 35a is brought into contact with the mast 70 from the front side. Then, the mast 70 is sandwiched between the first member 35a and the second member 35b, and is loosely temporarily fixed with the screw 35c. Thereafter, the antenna device 10 is rotated, the mark 21 is directed toward the radio wave transmission tower, and the screw 35c is firmly fixed, and the cover members 31a and 31b are closed.

[5. effect]
According to the first embodiment described above, the following effects can be obtained.
(1) The antenna device 10 is fixed to the mast 70 by opening the cover members 31 a and 31 b and fixing the mast 70 to the internal fixing bracket 35. Then, the fixing bracket 35 is hidden inside the cover portion 31 by closing the cover members 31a and 31b. Therefore, since the fixing bracket 35 is not exposed, the appearance is simple and an excellent aesthetic appearance can be given.

(2) Since the central axis L of the antenna main body 20, the central axis of the cover 31, and the central axis of the mast 70 coincide with each other, a simpler appearance can be obtained and a better aesthetic appearance can be given.
(3) Not only the fixing bracket 35 but also the output connector 25 for connecting the coaxial cable 80 is provided inside the cover portion 31, and the output connector 25 is not exposed. Therefore, a better aesthetic appearance can be given.

  (4) When the mast 70 is fixed to the fixing bracket 35 and the coaxial cable 80 is connected to the output connector 25 and then the cover members 31 a and 31 b are closed, the periphery of the output connector 25 is surrounded by the small chamber portion 40. Thereby, even if water permeates into the connection part 30, it can suppress that the output connector 25 in the small room part 40 gets wet. As a result, the waterproof cap which covers the output connector 25 can be made unnecessary.

  (5) Since the central axis and the outer diameter of the antenna body 20 and the connection part 30 are the same, the outer surface of the antenna body 20 and the outer surface of the connection part 30 are flush with each other. Therefore, it becomes a simpler appearance and can give a better aesthetic appearance.

(6) Since the mark 21 which shows that it is a front is attached | subjected to the outer side surface of the antenna main-body part 20, the direction adjustment of the antenna apparatus 10 can be performed easily.
(Second Embodiment)
[1. Difference from the first embodiment]
Since the basic configuration of the second embodiment is the same as that of the first embodiment, the description of the common configuration will be omitted, and the description will focus on the differences. Note that the same reference numerals as those in the first embodiment indicate the same configuration, and the preceding description is referred to.

  In the first embodiment described above, the connection portion 30 includes two fixing brackets 35 having the same inner diameter. On the other hand, in 2nd Embodiment, as shown in FIG. 4, the connection part 30 is different from 1st Embodiment by the point provided with the two fixing metal fittings 351,352 of a different internal diameter.

  The fixing brackets 351 and 352 have the same configuration as the fixing bracket 35 except that the diameter of the fixing hole is different. The fixing bracket 351 is formed with a relatively large diameter of the fixing hole so as to correspond to the thick mast 72 having a relatively large outer diameter. On the other hand, the fixing bracket 352 is formed so that the diameter of the fixing hole is relatively small so as to correspond to the thin mast 71 having a relatively small outer diameter.

  As shown in FIG. 4, on the floor surface 39 of the cover member 31a, the fixing bracket 351 is installed below the fixing bracket 352 with a predetermined interval. Both the fixing bracket 351 and the fixing bracket 352 are installed so that the central axis of the fixing hole coincides with the central axis L of the antenna body 20.

  When the antenna device 10 is fixed to the thin mast 71, as shown in FIGS. 5 and 7, the tip portion of the thin mast 71 passes through the fixing holes of the fixing bracket 351 and the fixing bracket 352, and the tip surface of the thin mast 71 is The tip portion of the thin mast 71 is sandwiched between the fixtures 352 while being positioned above the fixtures 352. At this time, the thin mast 71 passes through the fixing hole of the fixing bracket 351 but does not contact the fixing bracket 351.

  On the other hand, when the antenna device 10 is fixed to the thick mast 72, as shown in FIGS. 6 and 8, the tip portion of the thick mast 72 passes through the fixing hole of the fixing bracket 351, and the tip surface of the thick mast 72 is the fixing bracket. The distal end portion of the thick mast 72 is sandwiched between the fixing bracket 351 while being positioned between the fixing bracket 352 and the fixing bracket 352.

  In addition, although the connection part 30 is provided with two types of fixing brackets 351 and 352 having different inner diameters, it may be provided with three or more types of fixing brackets having different inner diameters. As the types of fixing brackets are increased, a plurality of masts having different outer diameters can be handled. In this case, on the floor surface 39, a fixing bracket having a smaller inner diameter may be installed on the upper side. Alternatively, a plurality of fixing brackets 351 and 352 may be provided, the thick mast 72 may be fixed by the plurality of fixing brackets 351, and the thin mast 71 may be fixed by the plurality of fixing brackets 352. In this case, a plurality of fixing brackets 351 may be installed on the floor surface 39 at a predetermined interval, and a plurality of fixing brackets 352 may be installed above the plurality of fixing brackets 351 at a predetermined interval.

[2. effect]
According to the second embodiment described above, in addition to the effects (1) to (6) of the first embodiment described above, the following effects can be obtained.

  (7) Since the connection unit 30 includes a plurality of types of fixing brackets 351 and 352 having different inner diameters, a mast that fixes the antenna device 10 can be selected from a plurality of types of masts having different outer diameters.

(Third embodiment)
[1. overall structure]
The appearance of the antenna device 100 according to the third embodiment is shown in FIGS. The antenna device 100 includes an antenna main body 200, a connection unit 300, and a mast 700. The antenna device 100 is, for example, a UHF antenna for receiving digital terrestrial broadcasting. Here, the direction parallel to the central axis LL of the antenna device 100 is defined as the vertical direction. The side of the antenna device 10 connected to the mast 700 is the rear end side or the lower side, and the opposite side of the rear end side is the front end side or the upper side.

The antenna main body 200 is configured in the same manner as the antenna main body 20.
The connection part 300 is formed in a columnar shape whose central axis coincides with the central axis LL of the antenna main body part 200 and whose outer diameter coincides with the outer diameter of the antenna main body part 200. A space is formed inside the connection part 300. The connection unit 300 is attached to the main body bottom surface 220 such that the cylindrical upper surface 370 contacts the main body bottom surface 220 that is the bottom surface of the antenna main body 200. Further, the bottom surface of the connecting portion 300, that is, the cylindrical bottom surface is open.

  A fixing bracket 400 for fixing the mast 700 is installed inside the connection part 300. The inner diameter of the fixture 400 is slightly larger than the outer diameter of the mast 70. The fixture 400 has a first engagement portion 410 formed on the inner surface. In addition, a cylindrical output connector 250 is provided so as to protrude from the bottom surface 220 of the main body into the fixing bracket 400. The fixing bracket 400 and the output connector 250 are provided at a position where the central axis coincides with the central axis LL of the antenna body 200.

  The mast 700 is a cylindrical rod formed of metal, and is fixed to the roof of a house or the like, similar to the mast 70. A coaxial cable 80 fitted with a connection connector 90 passes through the mast 700. A cable outlet 710 for pulling out the coaxial cable 80 from the inside is formed on the lower side surface of the mast 700. A fixture 740 that fixes the connection connector 90 to the inner surface of the mast 700 is attached to the connection connector 90. Dowels for positioning the fixture 740 may be provided on the inner surface of the tip portion of the mast 700 at intervals of 120 °, for example. When the rear end portion of the mast 700 is buried in the ground, the coaxial cable 80 may be pulled out from the cable outlet 710. However, when the mast 700 is installed in the air, the opening of the cable outlet 710 and the mast 700 is used. The coaxial cable 80 may be pulled out from any of the rear end surfaces. Details of the output connector 250 and the connection connector 90 will be described later.

  A second engagement portion 720 that engages with the first engagement portion 410 of the fixing bracket 400 is formed on the outer surface of the tip portion of the mast 700. Further, a packing 730 is provided below the second engagement portion 720 on the outer surface of the tip portion of the mast 700. Note that the installation positions of the second engaging portion 720 and the packing 730 may be switched up and down. Further, a plurality of second engaging portions 720 and packings 730 may be provided. Details of the first engaging portion 410, the second engaging portion 720, and the packing 730 will be described later.

  When the tip portion of the mast 700 is fitted inside the fixing bracket 400, the first engagement portion 410 and the second engagement portion 720 are engaged, and the output connector 250 and the connection connector 90 are connected. That is, the antenna body 200 and the mast 700 are mechanically connected, and the antenna body 200 and the coaxial cable 80 are electrically connected.

[2. Connector configuration]
Next, the configuration of the output connector 250 and the connection connector 90 will be described with reference to FIG.

  The output connector 250 includes a connector main body portion 251, a spring holding portion 252, and a spring 253. The connector body 251 is a cylindrical conductor. The spring holding portion 252 is an insulator provided so as to contact the inner side surface of the connector main body portion 251. The spring 253 is a conductor held by the spring holding portion 252 so as to be positioned at the center of the connector main body portion 251.

  The connector 90 includes a connector body 91, a fitting portion 92, a leaf spring 93, a center contact holding portion 94, a center contact 95, a sleeve 96, a press-fit ring 97, a crimp ring 98, and a core wire crimp. Part 99. The connection connector 90 is attached with a fixture 740 that is in contact with the inside of the mast 700. In the present embodiment, the fixture 740 has an annular shape.

  The connector main body 91 is a cylindrical conductor. The fitting portion 92 is a cylindrical conductor press-fitted into the outer surface of the tip portion of the connector main body portion 91. The leaf spring 93 is a cylindrical conductor fixed in a groove formed by the protrusion at the tip of the fitting portion 92 and the upper surface of the connector main body 91. On the side surface of the leaf spring 93, a plurality of arc-shaped protrusions protruding inward are formed at predetermined intervals.

  The center contact holding portion 94 is a cylindrical insulator and is attached to the inside of the connector main body 91. The center contact 95 is a conductor held inside the center contact holding portion 94. In the center of the center contact 95, a hole for receiving the core wire of the coaxial cable 80 is provided, and a core wire crimping portion 99 for inserting and fixing the core wire of the coaxial cable is provided.

  The sleeve 96 is a cylindrical conductor extending from the bottom surface of the connector main body portion 91 to the rear side, and is provided with a taper so that the thickness decreases toward the rear side. The press-fitting ring 97 is a ring formed of a ring-shaped metal that is crimped to the outer surface of the sleeve 96. The press-fitting ring 97 sandwiches and holds the fixture 740 attached so as to contact the bottom surface of the connector main body 91 with the connector main body 91. The crimp ring 98 is a ring formed of a ring-shaped metal that is crimped to the outer surface of the coating of the coaxial cable 80.

  The connection connector 90 is assembled by the following method. First, the distal end portion of the connector main body 91 is press-fitted into the fitting portion 92 and fixed. Then, the leaf spring 93 is fixed in close contact with the inside of the fitting portion 92. Subsequently, the fixing tool 740 is passed through the sleeve 96 extended to the rear side of the connector main body 91, and the press-fitting ring 97 is further press-fitted and fixed.

  Then, the core wire of the coaxial cable 80 processed to a predetermined dimension is inserted through the center contact 95. Subsequently, the center contact 95 is inserted into the center contact holding portion 94 and crimped from the outside of the center contact holding portion 94 to fix the core wire crimping portion 99 to the core wire. Subsequently, the crimp ring 98 is passed through the coaxial cable 80. Then, the center contact holding portion 94 and the center contact 95 to which the core wire of the coaxial cable 80 is fixed are inserted into the connector main body 91 from the sleeve 96 side, and the sleeve 96 is inserted into the aluminum laminate foil of the coaxial cable 80 and the copper. It is inserted between the braids and temporarily fixed at a predetermined position. When the coaxial cable 80 does not include the aluminum laminate foil, a sleeve 96 may be inserted between the insulator outside the core wire of the coaxial cable 80 and the copper braid. Subsequently, the crimp ring 98 is crimped and fixed to the coating of the coaxial cable 80.

  When the distal end portion of the mast 700 is inserted into the fixing bracket 400, the center contact 95 is sandwiched between the springs 253 and the connector main body 251 is fitted inside the fitting portion 92, so that the outer side of the connector main body 251 is removed. The side surface comes into contact with the protruding portion of the leaf spring 93. As a result, the coaxial cable 80 is electrically connected to the antenna body 200, and a reception signal received by the antenna body 200 is transmitted via the coaxial cable 80.

[3. Mast fixing structure]
Next, mechanical fixing between the mast 700 and the antenna main body 200 will be described. As shown in FIG. 12, the first engagement portion 410 is a groove formed in an annular shape on the inner surface of the fixing bracket 400. As shown in FIGS. 14 and 15, the second engagement portion 720 is a C-ring having a slit in a part of an annular shape, and has a trapezoidal vertical cross section.

  As shown in FIG. 12, an annular groove 725 is formed on the outer surface of the tip portion of the mast 700, and the second engagement portion 720 is fitted in the groove 725. At that time, the second engaging portion 720 is embedded in the groove 725 so that the shorter base of the trapezoid is on the upper side of the longer base in the vertical cross section. In the state of being embedded in the groove 725, the second engaging portion 720 has the upper end of the outer surface slightly inside the outer surface of the mast 700, or the upper end of the outer surface is the same as the outer surface of the mast 700. It exists on the surface, and the lower end of the outer surface protrudes outward from the outer surface of the mast 700.

  Further, as shown in FIG. 16, the packing 730 is an annular packing whose vertical cross section is O-shaped, that is, circular. The diameter of the packing 730 is slightly larger than the outer diameter of the mast 700. As shown in FIG. 13, an annular groove 735 is formed below the groove 725 on the outer surface of the tip portion of the mast 700, and the packing 730 is embedded in the groove 735. In the state embedded in the groove 735, the packing 730 protrudes slightly outside the outer surface of the mast 700. Note that the groove 735 may be formed above the groove 725.

  When forming the groove 735, a force may be applied from the outside of the mast 700 toward the center to reduce the diameter. In this case, since a convex portion that is reduced in diameter and protrudes inward is formed on the inner side surface of the mast 700, this convex portion may be used for positioning the fixture 740 instead of the dowel.

  Next, a method for fixing the antenna device 100 to the mast 700 will be described with reference to FIGS. 17 and 18. First, the second engaging portion 720 and the packing 730 are attached to the mast 700. Then, the distal end portion of the mast 700 is inserted into the fixing bracket 400, and the mast 700 is pushed forward while the diameter of the second engagement portion 720 is reduced. In order for the second engagement portion 720 to enter the inside of the fixing bracket 400 and the packing 730 to go out of the fixing bracket 400, in order to improve the sliding, a small amount of moisture in the packing 730 is included, and the packing 730 is Press fit into the interior of the fixture 400.

  If the 2nd engaging part 720 and packing 730 enter the inside of the fixture 400, the mast 700 will be pushed forward as it is crushed in the part which protrudes from the outer surface of the mast 700 of the packing 730. Then, the second engagement portion 720 is fitted into the groove of the first engagement portion 710. As a result, the antenna body 200 is fixed to the mast 700. And the antenna main-body part 200 is rotated and the mark 21 is orient | assigned to the direction of the transmission tower of an electromagnetic wave. When the packing 730 is dried, the antenna body 200 cannot be rotated, and the direction of the antenna body 200 is fixed.

  The packing 730 has an appropriate holding force and mobility, is a waterproofing member that prevents water droplets from entering the inside of the fixing bracket 400, and is also a fixing member that fixes the direction of the antenna body 200. A slip stopper such as a knurl may be provided on the inner surface of the fixture 400 with which the packing 730 abuts. A plurality of pairs of the first engaging portion 410 and the second engaging portion 720 may be provided, or a plurality of packings 730 may be provided.

[4. effect]
According to the third embodiment described in detail above, the following effects are obtained in addition to the effects (1) to (3), (5), and (6) of the first embodiment described above.

  (8) The antenna body 200 and the mast 700 can be mechanically connected only by fitting the fixing bracket 400 and the tip of the mast 700, and the antenna body 200 and the coaxial cable 80 are electrically connected. Can be connected.

  (9) Since the coaxial cable 80 passes through the inside of the mast 700, the appearance becomes simpler and a better aesthetic appearance can be given. Furthermore, since it becomes difficult to receive the restriction | limiting of the coaxial cable 80 when rotating the antenna main-body part 200, it is easy to adjust the direction of the antenna main-body part 200. FIG.

(Other embodiments)
As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the above-mentioned embodiment, It can implement in various deformation | transformation.

  (A) In each said embodiment, although the antenna main-body parts 20 and 200, the connection parts 30 and 300, and the masts 70, 71, 72, and 700 are the same cylindrical shape, they may differ. Moreover, in each said embodiment, although the shape of the antenna main-body parts 20 and 200 and the connection parts 30 and 300 is a circular cylinder shape with the perpendicular | vertical cross section perpendicular | vertical to an up-down direction, it is not limited to this. For example, the shapes of the antenna main body portions 20, 00 and the connection portions 30, 300 may be elliptical or polygonal columnar vertical sections. As shown in FIG. 19, the antenna main body portions 20 and 200 and the connection portions 30 and 300 may have columnar shapes in which the vertical cross section is a shape obtained by cutting a part of a circle with a line along the diameter. Further, the shapes of the masts 70, 71, 72, and 700 are not limited to the cylindrical shape. When the shapes of the masts 70, 71, 72, and 700 are other than the cylindrical shape, the shapes of the mast insertion port 32 and the fixing brackets 35, 351, 352, and 400 are matched with the shapes of the masts 70, 71, 72, and 700. The shape may be used.

  (B) In each of the above embodiments, the central axes of the antenna main body portions 20 and 200, the connection portions 30 and 300, and the masts 70, 71, 72, and 700 are coincident, but they may not be coincident. Even if the central axes do not coincide with each other, if the fixing brackets 35, 351, 352, and 400 are not exposed, an excellent aesthetic appearance can be given.

  (C) In each of the embodiments described above, the outer diameters and shapes of the antenna body portions 20 and 200 and the connection portions 30 and 300 are the same, but the outer diameters and shapes may be different. Even if the outer side surfaces of the antenna main body parts 20 and 200 and the outer side surfaces of the connection parts 30 and 300 are not flush with each other, if the fixing brackets 35, 351, 352, and 400 are not exposed, an excellent aesthetic appearance is given. be able to.

  (D) In the first and second embodiments, the cover portion 31 is composed of the two cover members 31a and 31b, but may be integrally formed without being divided. That is, the cover part 31 may be formed in an integral columnar shape having a space inside. In this case, for example, the fixing bracket 35 may be attached to the bottom surface 22 of the antenna body 20 like the fixing bracket 400, and the cover portion 31 may be fitted after the mast 70 is fixed to the fixing bracket 35.

  (E) In the first and second embodiments, the output connector 25 is provided inside the cover portion 31 and is not exposed, but the output connector 25 may be exposed. Even if the output connector 25 is exposed, if the fixing brackets 35, 351, 352, and 400 are not exposed, an excellent aesthetic appearance can be given.

  (F) In the first and second embodiments, the cover member 31b is attached so as to open toward the front side with respect to the cover member 31a, but may be attached so as to open toward the upper side. However, it may be attached so as to open downward. Further, the cover member 31b may be attached so as to slide upward or downward with respect to the cover member 31a. The cover member 31b may be attached in any manner as long as it can be opened and closed with respect to the cover member 31a.

  (G) A plurality of functions of one constituent element in the above embodiment may be realized by a plurality of constituent elements, or a single function of one constituent element may be realized by a plurality of constituent elements. . Further, a plurality of functions possessed by a plurality of constituent elements may be realized by one constituent element, or one function realized by a plurality of constituent elements may be realized by one constituent element. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified only by the wording described in the claim are embodiment of this invention.

  (H) In addition to the antenna device described above, the present invention can also be realized in various forms such as a system including the antenna device as a component.

  DESCRIPTION OF SYMBOLS 10,100 ... Antenna apparatus, 20,200 ... Antenna main-body part, 21 ... Mark, 22,220 ... Main-body part bottom face, 25, 250 ... Output connector, 30, 300 ... Connection part, 31 ... Cover part, 31a, 31b ... Cover member, 32 ... mast insertion port, 35, 351, 352, 400 ... fixing bracket, 40 ... small chamber, 40a, 40b ... partition member, 33, 45 ... cable insertion port, 70, 71, 72, 700 ... mast 80 ... Coaxial cable, 90 ... Connector.

Claims (8)

An antenna device used by being fixed to a mast,
A pillar-shaped antenna body,
A connection portion attached to the bottom surface of the main body, which is the bottom surface of the antenna main body,
The connecting portion is
A column-shaped cover portion in which a space is formed and a mast insertion port for inserting the mast is formed on the bottom surface;
Having at least one fixing bracket installed inside the cover portion and configured to fix the mast;
An antenna device characterized by that. The cover portion is configured such that a central axis of the antenna main body portion and a central axis of the cover portion coincide with each other.
The fixing bracket is configured to fix the mast at a position where a central axis of the antenna main body portion and a central axis of the mast coincide with each other.
The antenna device according to claim 1. The antenna main body has an output connector provided so as to protrude from the bottom of the main body into the cover.
The antenna device according to claim 1 or 2, wherein The cover portion has two cover members formed by being divided by a plane parallel to the columnar central axis of the cover portion, and one of the cover members can be opened and closed with respect to the other cover member. Installed and configured,
The antenna device according to claim 3. The connecting portion surrounds the output connector protruding from the bottom surface of the main body portion inside the cover portion, and is configured to partition a space around the output connector and a space in the cover portion. Have
Each of the cover members has a partition member that forms the small chamber portion when the cover member is closed,
The partition member is formed with a cable insertion port for inserting a cable connected to the output connector into the small chamber portion.
The antenna device according to claim 4. The mast is formed in a column shape,
The fixing bracket has a plurality of fixing brackets having the same central axis and different inner diameters so as to correspond to the outer diameters of the plurality of masts.
The antenna device according to any one of claims 1 to 5, wherein: A pillar-shaped antenna body,
A cylindrical connection portion attached to the bottom surface of the main body portion, which is the bottom surface of the antenna main body portion, and having a cylindrical fixing metal fitting inside,
A cylindrical mast configured so that a tip portion fits into the fixing bracket;
An output connector provided so as to protrude from the bottom surface of the main body into the fixing bracket;
A connector that is attached to a cable passing through the interior of the mast and is fixed to a tip portion of the mast;
The output connector and the connection connector are configured to be connected with the fitting between the fixing bracket and the tip of the mast.
An antenna device characterized by that. The antenna body is formed in a cylindrical shape,
The connecting portion is formed in a cylindrical shape having the same central axis and the same outer diameter as the antenna body portion.
The antenna device according to claim 1, wherein the antenna device is an antenna device.