JP2014068270A - Antenna case and antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna device having a radiator and a plate-shaped reflector housed in an antenna case which ensures strength of a mounting part disposed on a back surface of the case without adding to the size of the device.SOLUTION: A mounting part 30 for the mounting of a fixing member for fixing the antenna device to a mount object is formed on a bottom part 13 of a case body 10 housing the plate-shaped radiator and reflector in an opposed condition. The mounting part 30 is formed via a wall part 40 projecting to a predetermined height position from a back surface of the case body 10, and a side of the wall part 40 opposite to a peripheral edge is an inclined portion 40a inclined at a predetermined angle. The inclined portion 40a has two groove portions 42 formed in the direction of inclination, and an inner surface of the case body 10 corresponding to the inclined portion 40a and the mounting part 30, and a boundary portion between the bottom part 13 of the case body 10 and the inclined portion 40a also have pluralities of plate-shaped ribs 44, 46 formed in parallel with the groove portions 42.

Description

  The present invention relates to an antenna case for storing a radiator that radiates linearly polarized radio waves and a reflector made of a conductive plate-like member in a state in which the plate surface of the reflector faces the radiator. The present invention also relates to an antenna device including the antenna case.

  Conventionally, a reflector is formed by forming a plurality of openings in a plate-like member having conductivity, and a plate-like antenna element constituting a skeleton slot antenna is provided with a predetermined interval from the reflector. A thin antenna device is known that is configured to be mounted on a wall surface of a building or the like by being disposed in parallel (see, for example, Patent Document 1).

  In this type of antenna device, the reflector and the radiator are housed in a rectangular and thin antenna case, and the mounting bracket is attached to the back surface of the antenna case, so that the mounting object is attached via the mounting bracket. Attached to a building wall or column.

JP 2012-10328 A

By the way, there are antenna devices for strong electric field strength and those for low electric field strength depending on the intensity of received radio waves (for example, television broadcast radio waves).
The antenna device for low electric field strength has a larger radiator and reflector, and the antenna case becomes larger and heavier than the antenna device for strong electric field strength.

  In this case, in the antenna device for low electric field strength, there is no problem if the mounting portion of the mounting bracket or the mounting bracket in the antenna case is made larger than that of the antenna device for strong electric field strength. Cannot be shared between different types of antenna devices, resulting in increased costs.

  On the other hand, in order to share the mounting bracket between the antenna devices, if the mounting portion of the mounting bracket is configured in the same manner as the antenna device for strong electric field strength in the antenna device for low electric field strength (specifically, the antenna case), the mounting portion It is conceivable that an excessive force is applied to the antenna device due to its own weight or wind and the antenna case is damaged.

  In particular, since the antenna device can be used by being attached to a wall surface of a building, the mounting portion is not the center of the back surface of the antenna case but the outer periphery that is one side of the back surface in order to facilitate the mounting work. It is provided along the edge.

For this reason, in the antenna device, an excessive force is easily applied to the antenna case from the mounting portion, and the strength around the mounting portion in the antenna case is required to be increased.
In order to increase the strength, it is conceivable to provide a reinforcing member such as an iron plate or to increase the thickness of the mounting portion and the surrounding area of the antenna case. However, with such measures, the weight of the antenna device increases. Furthermore, there is a problem that reinforcement is required and the size of the antenna device (antenna case) is increased.

  The present invention has been made in view of these problems. A radiator that radiates linearly polarized radio waves and a reflector made of a conductive plate-like member, and a reflector plate surface facing the radiator. An object of the antenna device housed in the antenna case in such a state is to ensure the strength of the mounting portion provided on the back surface of the antenna case without causing an increase in size of the antenna device.

In order to achieve this object, the invention according to claim 1 is characterized in that a radiator that radiates linearly polarized radio waves and a reflector made of a conductive plate-like member are arranged on the plate surface of the reflector. An antenna case formed of a resin capable of transmitting radio waves so as to be stored in a state facing the radiator,
A support portion having an opening larger than the plate surface of the reflector, and supporting the reflector and the radiator with a gap from the bottom opposite to the opening toward the opening. A box-shaped case body with
A cover for closing the opening in a state where the reflector and the radiator are housed in the case body;
With
At the bottom of the case body, on the back surface opposite to the opening, a mounting for mounting a fixing member for fixing the antenna case to an attachment object along an outer peripheral edge that is one side of the back surface The part is formed through a wall part protruding from the back surface to a predetermined height position,
In the wall portion, the side opposite to the outer peripheral edge is an inclined portion inclined at a predetermined angle from the back surface of the bottom portion of the case body to the predetermined height position,
Moreover, at the bottom of the case body,
The inclined portion from the back surface of the case main body is formed with one or a plurality of groove portions having a concave cross section that is recessed toward the inside of the case main body along the inclination direction of the inclined portion.
In the inclined part and the mounting part, a plurality of plate-like ribs parallel to the groove part are formed on the inner side surface of the case body,
Furthermore, a plurality of plate-like ribs parallel to the groove are formed at the boundary between the bottom portion and the inclined portion of the case main body inside the case main body.

The invention according to claim 2 is a radiator that radiates linearly polarized radio waves;
A reflector made of a plate-like member having conductivity;
An antenna case formed of a resin capable of transmitting radio waves so as to store the radiator and the reflector in a state in which the plate surface of the reflector is opposed to the radiator;
An antenna device comprising:
The antenna case is configured by the antenna case according to claim 1.

  As described above, in the antenna case and the antenna device of the present invention, at the bottom of the case body constituting the antenna case, the back surface opposite to the opening of the case body has an outer peripheral edge that is one side of the back surface. Along with this, there is provided a mounting portion for mounting a fixing member for fixing the antenna case (and thus the antenna device) to the mounting object.

  And this mounting part is formed through the wall part protruded from the back surface of the bottom part of a case body to a predetermined height position, and the opposite side to the peripheral edge in the wall part is the case body. The inclined portion is inclined at a predetermined angle from the back surface of the bottom portion to a predetermined height position.

  And from the back surface of the case body to the inclined part, one or a plurality of grooves having a concave cross-section recessed toward the inside of the case body are formed along the inclination direction of the inclined part, and the inclined part A plurality of plate-like ribs parallel to the groove portions are formed on the inner surface of the case main body in the mounting portion and the boundary between the bottom portion and the inclined portion of the case main body inside the case main body.

  Therefore, the mounting portion of the fixing member and its periphery are reinforced by the slope of the inclined portion, the groove provided on the slope, and a plurality of ribs provided on the inside of the case body, and simply the bottom of the case body. The strength of the mounting portion (and thus the antenna case) can be increased compared to the case where the mounting portion forming wall portion is erected from the back surface to a predetermined height position.

  Therefore, according to the present invention, the strength of the mounting portion provided on the back surface of the antenna case (and hence the strength of the antenna case) can be ensured without increasing the size of the antenna device.

The appearance of the antenna device of an embodiment is expressed, (a) is a perspective view showing the state which looked at the antenna device from the slanting front side, and (b) is the perspective view showing the state which looked at the antenna device from the slanting back side. It is a perspective view showing the internal structure of the case main body of an antenna apparatus, (a) represents the state which removed the cover from the case main body, (b) represents the state which further removed the radiator, and (c) further reflected the reflector. Represents the state where is removed. It is explanatory drawing showing the mounting state to the antenna apparatus of the mounting bracket and mounting bracket of embodiment. It is explanatory drawing showing the structure of the attachment part formed in the bottom part of a case main body, (a) represents the state which looked at the attachment part from the outer side of the case main body, (b) looked at the attachment part from the inner side of the case main body. Represents the state.

Embodiments of the present invention will be described below with reference to the drawings.
The antenna device 2 of the present embodiment is for receiving television broadcast radio waves in the UHF band, and the radiators 4a and 4b and the reflectors 6a and 6b shown in FIG. 2 are made of a synthetic resin that can transmit radio waves. It is configured by being housed in a waterproof antenna case 8 (see FIG. 1).

Here, the radiators 4a and 4b are configured as skeleton slot antennas by punching and molding a thin plate of a conductive material made of a metal plate or the like using, for example, a mold.
The reflectors 6a and 6b are also configured by stamping and forming a thin plate of a conductive material made of a metal plate or the like into a predetermined shape using a mold.

Note that the shapes of the radiators 4a and 4b and the reflectors 6a and 6b are described in the above-described Patent Document 1 and the like, and are not the main part of the present invention, so detailed description thereof will be omitted.
Next, as shown in FIGS. 1 and 2, the antenna case 8 includes a flat box-shaped case main body 10 having an opening 11 larger than the plate surfaces of the reflectors 6 a and 6 b, and a radiator on the case main body 10. 4a and 4b and plate-like reflectors 6a and 6b, and a cover 50 that closes the opening 11 in a state in which the reflectors 6a and 6b are accommodated.

  As shown in FIG. 2, in the case main body 10, the radiators 4 a and 4 b and the reflectors 6 a and 6 b are supported with a space from the bottom 13 on the side opposite to the opening 11 toward the opening 11. A large number of support portions 14 and 16 for projecting are provided.

Among the support portions 14 and 16, the support portion 14 that supports the radiators 4a and 4b is higher in height from the surface of the bottom portion 13 than the support portion 16 that supports the reflectors 6a and 6b.
For this reason, as apparent from FIGS. 3A to 3C, first, the reflectors 6 a and 6 b are mounted in the case body 10 via the support portion 16, and then, via the support portion 14. The radiators 4a and 4b are attached.

As a result, the reflectors 6a and 6b and the radiators 4a and 4b are fixed in the case body 10 so as to face each other with a predetermined interval.
Further, the reflectors 6a and 6b and the radiators 4a and 4b are fixed to the case body 10 by screwing to the support portions 16 and 14.

  And the support part 14 of the radiators 4a and 4b is fitted with a support part 14a for screwing and a protrusion (not shown) formed by bending a part of the plate surface of the radiators 4a and 4b. In addition, the positioning support portion 14b for positioning the radiators 4a and 4b is configured.

  Further, the radiator 4a and the reflector 6a, and the radiator 4b and the reflector 6b are arranged to face each other in the case body 10, thereby constituting one antenna, and between these antennas. The power supply boards 18 connected to the power supply points of the radiators 4a and 4b are arranged.

The power supply substrate 18 is positioned and fixed at a substantially center in the case body 10 via a support portion 19 erected on the bottom portion 13 of the case body 10.
The power supply board 18 is connected to the F-type plug 22 in the terminal case 20 provided on the surface opposite to the opening 11 at the approximate center of the bottom portion 13 of the case body 10 (that is, the back surface of the bottom portion 13). They are connected (see FIG. 1B).

  For this reason, by connecting an F-type plug attached to the tip of the coaxial cable to the F-type plug 22, it is possible to take out received signals from the radiators 4 a and 4 b via the coaxial cable.

  The terminal case 20 protects the connection portion of the F-type plug 22 to the power supply substrate 18, and projects the F-type plug connection portion of the F-type plug 22 below the antenna device 2 to connect the connection portion. Is to protect against rainwater.

  Further, as shown in FIG. 1B, the mounting portion 30 of the mounting bracket 60 is formed on the back surface side of the bottom portion 13 of the case body 10 along the outer peripheral edge located below the terminal case 20. ing.

  The mounting bracket 60 is for attaching the antenna device 2 to a wall surface or a column of a building, and includes a plate-like contact portion 62 that contacts the wall surface or the column of the building, and upper and lower portions of the contact portion 62. A pair of support pieces 64a and 64b extending from both end edges in a direction orthogonal to the contact surface of the contact portion 62, and a bolt 66 provided so as to penetrate the pair of support pieces 64a and 64b. Has been.

  Of the pair of support pieces 64a and 64b, the upper support piece 64a is provided with a nut 68 that can be screwed with the screw portion formed at the tip of the bolt 66, and the lower support piece 64b has An insertion hole 69 through which the bolt 66 is inserted is formed.

  The insertion hole 69 is formed with a screw thread (female screw) capable of screwing the threaded portion 67 of the bolt 66, and the portion from the threaded portion 67 of the bolt 66 to the head is more than the threaded portion 67. It has a small diameter.

  For this reason, if the screw part 67 is arrange | positioned between the support pieces 64a and 64b through the insertion hole 69 of the support piece 64b, the bolt 66 will not screw the screw part 67 to the nut 68 of the support piece 64a. However, it does not fall out of the mounting bracket 60.

  On the other hand, the mounting portion 30 is set such that the length in the vertical direction can be inserted between the upper and lower support pieces 64 a and 64 b of the mounting bracket 60. The mounting portion 30 is formed with a bolt insertion hole 32 having a T-shaped cross section and extending in the width direction so as to penetrate the inside in the vertical direction.

  Further, in the bolt insertion hole 32, the T-shaped transverse long hole in the width direction is formed substantially parallel to the back surface of the case body 10, and the T-shaped vertical hole is formed on the back surface of the case body 10. It is formed towards.

  The mounting bracket 60 is mounted to the mounting portion 30 so that the upper and lower support pieces 64a and 64b cover both ends of the bolt insertion hole 32. After mounting, the bolt 66 is passed through the bolt insertion hole 32 to The screw portion 67 is screwed into the nut 68 and tightened to fix the positioning.

  Therefore, the bolt 66 can be moved in the bolt insertion hole 32 before the screw portion 67 is tightened to the nut 68. Therefore, as illustrated in FIGS. 3B to 3D, the relative position between the bolt 66 (in other words, the mounting bracket 60) and the case body 10 (in other words, the antenna device 2) can be changed, and the bolt By rotating the antenna device 2 around 66, the radiation direction of the radio waves by the radiators 4a and 4b can be arbitrarily set.

  Next, the mounting portion 30 of the antenna device 2 to which the mounting bracket 60 is mounted in this manner has a predetermined height outward from the back surface of the case body 10 by denting the bottom portion 13 of the case body 10 to the back surface side. Only placed at a high position.

  That is, as shown in FIG. 4, in the bottom portion 13 of the case body 10, a wall portion 40 protruding to a predetermined height position is formed on the back surface opposite to the opening portion 11. It is integrally formed with the case body 10 via the wall portion 40.

  And the wall part along the outer periphery edge of the back surface of the case main body 10 among the wall parts 40, and the wall part orthogonal to the wall part are erected so as to be substantially orthogonal to the back surface of the case main body 10. However, the side opposite to the outer peripheral edge of the back surface of the case body 10 is an inclined portion 40a that is inclined at a predetermined angle from the back surface of the bottom portion 13 of the case body 10 to a predetermined height position.

  Then, from the back surface of the bottom portion of the case body 10 to the inclined portion 40a, a cross-sectional recess recessed toward the inside of the case body 10 along the inclination direction of the inclined portion 40 (in other words, in the vertical direction of the case body 10). Two character-shaped groove portions 42 are formed.

  Further, in the inclined portion 40 a and the mounting portion 30, a large number of plate-like ribs 44 parallel to the two groove portions 42 are formed on the surface of the case body 10 on the opening 11 side (that is, the inner surface of the bottom portion 13). A plurality of plate-like ribs 46 (four rows in the figure) parallel to the groove 42 are formed on the inner side of the case body 10 at the boundary between the bottom 13 of the case body 10 and the inclined portion 40a.

  The mounting portion 30 of the mounting bracket 60 and its periphery in the case body 10 (in other words, the antenna device 2) are reinforced by the inclined portion 40a, the groove portion 42, and the ribs 44 and 46, and simply the bottom portion 13 of the case body 10. The strength of the mounting portion 30 (and thus the case main body 10) can be increased as compared with the case where the mounting portion forming wall portion is erected from the back surface to a predetermined height position.

  Therefore, according to the antenna device 2 of the present embodiment, the strength of the mounting portion 30 provided on the back surface of the antenna case 8 (and hence the strength of the antenna case 8) can be ensured without increasing the size of the antenna device. Will be able to.

In the present embodiment, the mounting bracket 60 corresponds to the fixing member described in the claims.
In the antenna device 2 of the present embodiment, the back surface side of the bottom surface 13 of the case body 10 is connected to the F-type plug 22 via the F-type plug at four locations on the top, bottom, left and right of the antenna case 8. A cable fixing portion 36 for fixing the coaxial cable is formed.
Similarly, on the back side of the bottom surface 13 of the case body 10, a rectangular recess 38 that is long in the vertical direction is formed on the left and right sides at the approximate center in the vertical direction of the antenna case 8. The concave portion 38 is provided so that an operator or the like can easily carry the antenna device 2 by putting a finger into the concave portion 38 when the antenna device 2 is carried.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various aspect can be taken in the range which does not deviate from the summary of this invention.
For example, the fixing member may be made of synthetic resin instead of the metal fittings described in the above embodiment. In addition, it is not always necessary to form a bolt insertion hole through which the bolt penetrates, as in the above-described embodiment, for example, a fitting hole or fitting groove that can be fitted to the fixing member is formed. You may make it do.

  DESCRIPTION OF SYMBOLS 2 ... Antenna apparatus, 4a, 4b ... Radiator, 6a, 6b ... Reflector, 8 ... Antenna case, 10 ... Case main body, 11 ... Opening part, 13 ... Bottom part, 14, 14a, 14b, 16, 19 ... Support part , 18 ... feeder board, 20 ... terminal case, 22 ... F-type plug, 30 ... mounting part, 32 ... bolt insertion hole, 36 ... cable fixing part, 38 ... recessed part, 40 ... wall part, 40a ... inclined part, 42 ... groove part, 44, 46 ... rib, 50 ... cover, 60 ... mounting bracket, 62 ... contact part, 64a, 64b ... support piece, 66 ... bolt, 67 ... screw part, 68 ... nut, 69 ... insertion hole.

Claims (2)

Transmits radio waves so that a radiator that radiates linearly polarized radio waves and a reflector made of a conductive plate-like member are stored with the reflector plate facing the radiator. An antenna case made of a flexible resin,
A support portion having an opening larger than the plate surface of the reflector, and supporting the reflector and the radiator with a gap from the bottom opposite to the opening toward the opening. A box-shaped case body with
A cover for closing the opening in a state where the reflector and the radiator are housed in the case body;
With
At the bottom of the case body, on the back surface opposite to the opening, a mounting for mounting a fixing member for fixing the antenna case to an attachment object along an outer peripheral edge that is one side of the back surface The part is formed through a wall part protruding from the back surface to a predetermined height position,
In the wall portion, the side opposite to the outer peripheral edge is an inclined portion inclined at a predetermined angle from the back surface of the bottom portion of the case body to the predetermined height position,
Moreover, at the bottom of the case body,
The inclined portion from the back surface of the case main body is formed with one or a plurality of groove portions having a concave cross section that is recessed toward the inside of the case main body along the inclination direction of the inclined portion.
In the inclined part and the mounting part, a plurality of plate-like ribs parallel to the groove part are formed on the inner side surface of the case body,
Further, an antenna case characterized in that a plurality of plate-like ribs parallel to the groove portion are formed inside the case body at a boundary portion between the bottom portion and the inclined portion of the case body. A radiator that emits linearly polarized radio waves;
A reflector made of a plate-like member having conductivity;
An antenna case formed of a resin capable of transmitting radio waves so as to store the radiator and the reflector in a state in which the plate surface of the reflector is opposed to the radiator;
An antenna device comprising:
The antenna device according to claim 1, wherein the antenna case is configured by the antenna case according to claim 1.

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