JP2010166508A - Antenna apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna apparatus which can be inexpensively produced and has high load resistant performance. <P>SOLUTION: An antenna apparatus 1 includes a cabinet 10 accommodating an antenna element and a mast mount 30 for mounting the cabinet 10 onto a mast. The cabinet 10 includes a lower case 12 and an upper case 14, and a back wall of the cabinet 10 has an overlapped part wherein the lower case 12 and the upper case 14 are overlapped. A patch 20 is abutted to an inner back of the back wall of the cabinet 10, and the patch 20 is temporarily fixed by a reflector of the antenna element assembled inside the cabinet 10 so as to maintain such a state. The overlapped part on the back wall of the cabinet 10 is crimped with the patch 20, a male screw 24 is mounted to fix the lower case 12 and the upper case 14, and a male screw 33 is mounted to crimp the back wall of the cabinet 10 and a mast receiving member 32 of the mast mount 30 with the patch 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an antenna device, and more particularly to an antenna device provided with a housing for housing an antenna element therein.

  As an antenna device provided with a housing for accommodating an antenna element therein, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 2007-49342 (Patent Document 1). The antenna device disclosed in Patent Document 1 can receive, for example, UHF (Ultra High Frequency) television radio waves for digital terrestrial television broadcasting, and is mainly intended to be installed outdoors.

  In the antenna device disclosed in Patent Document 1, a housing is constituted by a lower case of an upper surface opening and an upper case of a lower surface opening, and is formed inside the housing by fitting the upper case and the lower case together. An antenna element is accommodated in the accommodation chamber. A mast attachment for attaching the antenna device to the columnar mast is assembled to the back wall of the housing of the antenna device, and the antenna device is attached to the mast by fixing the mast attachment to the mast. It can be installed outdoors on the rooftop.

  Further, in the antenna device disclosed in Patent Document 1, the mounting angle of the mast mounting tool with respect to the housing is such that the antenna device can be installed horizontally or vertically. It is configured to be variable every 90 ° within a plane orthogonal to the tool assembly direction. Specifically, four positioning holes are provided in the mast fixture, and four positioning protrusions that can be fitted into the positioning holes described above are provided on the back wall of the housing. By providing the holes and the four positioning projections at equal intervals on virtual circles of the same diameter, the assembly angle of the mast fixture relative to the housing can be changed. Therefore, by changing the assembly angle of the mast fixture, both horizontal polarization and vertical polarization can be received in a good reception state.

  Further, in the antenna device disclosed in Patent Document 1 described above, as a mounting means for mounting the mast mounting tool to the housing, a flat plate-like mounting tool having a female screw portion and a male screwed into the same. Screws are used. Specifically, the above-described flat plate-like fitting is applied to the inner and rear surfaces located on the housing chamber side of the back wall of the housing, and the fitting is screwed on the back wall of the housing using the above-described male screw. Attach and fix the mast attachment using a separate male screw so that the back wall of the enclosure and the mast attachment are sandwiched between the attachment and the attachment fixed to the enclosure. By screwing, the mast fixture can be stably fixed to the housing. The four positioning projections described above are provided on the flat plate-shaped pad, and the four positioning protrusions are provided on the housing in a state where the pad is fixed to the back wall of the housing. In addition, each of the four insertion holes protrudes rearward from the back wall of the housing.

JP 2007-49342 A

  As described above, generally, as the casing of the antenna device, a box shape is used in which the lower case of the upper surface opening and the upper case of the lower surface opening are combined. Load performance is required. This load bearing performance is naturally required from the viewpoint of protecting the antenna element, regardless of whether the antenna device is installed indoors or outdoors. In the apparatus, it is necessary to be able to withstand wind pressure load and snow load, and it is required to have a robust structure with excellent load bearing performance. In addition, an installation tool such as the mast mounting tool described above is assembled in a case configured by combining the lower case and the upper case. The structure is also required to have a high load resistance from the viewpoint of stable installation of the antenna device.

  Here, in the antenna device disclosed in Patent Document 1, a fixing structure in which the casing and the mast mounting tool are fastened together with a male screw using a patch is adopted. Can be said. However, in the antenna device disclosed in Patent Document 1, joint fastening is not employed for the fixing structure of the lower case and the upper case. This is because, generally, the casing of the antenna device has a hermetically sealed structure, so that a fitting for co-fastening cannot be placed inside the casing when the lower case and the upper case are assembled. Therefore, for fixing the lower case to the upper case, fixing using ordinary screw fastening or fixing using hook-shaped locking claws is used, but such a fixing structure is adopted. In such a case, it is difficult to obtain the above-described sufficiently high load bearing performance.

  In addition, by devising the shape of the housing, it is not possible to have a fixing structure in which the upper case and the lower case are fastened together by screwing from the outside of the housing after exposing the brace to the outside of the housing However, when such a configuration is adopted, there is a problem that the design is greatly deteriorated due to the exposed tool being exposed to the outside of the casing, and the casing is enlarged to realize the fixing structure. Will not be an effective solution.

  It is also possible to adopt a fixing structure in which a locking tool such as a bolt is insert-molded in the housing itself and the upper case and the lower case are fastened together by screwing using the locking tool. If such a configuration is adopted, there arises a problem that the manufacturing cost is greatly increased.

  Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an antenna device that can be manufactured at low cost and has high load resistance.

  The antenna device according to the present invention includes an antenna element, a casing, an installation tool, and an assembling unit. The antenna element is for transmitting or receiving radio waves at least, and the housing includes a storage chamber in which the antenna element is stored. The installation tool is a member for installing the antenna device, and is attached to the back wall of the housing. The assembly means is for assembling the installation tool to the back wall of the housing. The housing includes a lower case having an upper surface opening and an upper case having a lower surface opening, and the back wall of the housing has an overlapping portion where the lower case and the upper case overlap in the front-rear direction of the housing. Have. The installation tool has at least an addressing portion addressed along an outer back surface located on the opposite side of the back wall of the housing from the accommodation chamber side. The assembling means is configured such that the overlapping portion of the back wall of the casing is between the abutting tool addressed along the inner and rear surfaces located on the accommodation chamber side of the back wall of the casing and the abutting tool. The lower case and the upper case are fixed by sandwiching and the first fixing means for fixing the abutment tool to the back wall of the housing, and the back wall of the housing between the abutment and the above And a second fixing means for fixing the installation tool to the back wall of the housing by sandwiching the addressing portion of the installation tool. In the antenna device according to the present invention, the lower case and the upper case are fixed and the pad is fixed to the back wall of the housing using the pad and the first fixing means. The fixing device can be fixed to the back wall of the housing by using the first fixing means by temporarily fixing the applying device to the inner and rear surfaces of the back wall of the housing in advance. Temporary fixing means is further provided.

  In the antenna device according to the present invention, it is preferable that the temporary fixing means is configured by a pressing portion that presses the application tool toward the inner and rear surfaces of the back wall of the housing to temporarily fix it. .

  In the antenna device according to the present invention, it is preferable that the pressing portion is constituted by the antenna element assembled to the housing.

  In the antenna device according to the present invention, the antenna element preferably includes a radiator, a director, and a reflector. In this case, the pressing portion is the radiator, the waveguide. Of the reflector and the reflector, it is preferable that the reflector is arranged in the housing chamber of the casing and located closest to the back wall of the casing.

  In the antenna device according to the present invention, the installation tool can clamp the mast between the mast receiving member addressed along the outer back surface of the back wall of the housing and the mast receiving member. A mast pressing member may be included, and in that case, it is preferable that the addressing portion is constituted by the mast receiving member.

  In the antenna device according to the present invention, the installation tool may further include a pedestal portion that extends from the addressing portion and is placed on the placement surface in addition to the addressable portion. .

  In the antenna device according to the present invention, it is preferable that the first fixing means and the second fixing means are both male screws, and in that case, a female screw portion screwed into the male screw. However, it is preferable to be provided in the above-mentioned application tool.

  In the antenna device according to the present invention, a plurality of protrusions are provided on the applicator, and a plurality of holes that can be fitted to the plurality of protrusions are provided on the installation tool. Preferably, in that case, it is preferable that the mounting tool is positioned with respect to the housing by fitting the plurality of holes into the plurality of protrusions.

  In the antenna device according to the present invention, it is preferable that each of the plurality of protrusions and the plurality of holes is four, and the plurality of protrusions are arranged at equal intervals on the first virtual circle. It is preferable that the plurality of holes are arranged at equal intervals on a second virtual circle having the same diameter as the first virtual circle.

  According to the present invention, an antenna device that can be manufactured at low cost and has high load resistance can be obtained.

It is a front side perspective view which shows the external appearance structure in the outdoor specification state of the antenna apparatus in embodiment of this invention. It is a back side perspective view which shows the external appearance structure in the outdoor specification state of the antenna apparatus in embodiment of this invention. It is a bottom view which shows the external appearance structure in the outdoor specification state of the antenna apparatus in embodiment of this invention. It is a rear view which shows the external appearance structure in the outdoor specification state of the antenna apparatus in embodiment of this invention. It is a figure which shows the internal structure in the outdoor specification state of the antenna apparatus in embodiment of this invention, and is a top view of the state which removed the upper case. It is a figure which shows the internal structure in the outdoor specification state of the antenna apparatus in embodiment of this invention, and is a schematic cross section along the VI-VI line shown in FIG. 1 and FIG. It is a disassembled perspective view which shows the assembly | attachment structure in the outdoor specification state of the antenna apparatus in embodiment of this invention. It is a back side perspective view of the patch of the antenna device in an embodiment of the invention. It is a back side expansion perspective view of the lower case of the part to which the fixture of the antenna device in embodiment of this invention is fixed. It is a back side principal part expansion perspective view of the upper case of the antenna apparatus in embodiment of this invention. It is a back side perspective view which shows the external appearance structure in the indoor specification state of the antenna apparatus in embodiment of this invention. It is a front side perspective view which shows the external appearance structure of the stand of the antenna apparatus in embodiment of this invention. It is a schematic perspective view for demonstrating the assembly procedure of the antenna apparatus in embodiment of this invention. It is a schematic perspective view for demonstrating the assembly procedure of the antenna apparatus in embodiment of this invention. It is a schematic perspective view for demonstrating the assembly procedure of the antenna apparatus in embodiment of this invention. It is a schematic perspective view for demonstrating the assembly procedure of the antenna apparatus in embodiment of this invention. It is a schematic perspective view for demonstrating the assembly | attachment procedure in setting the antenna apparatus in embodiment of this invention to an outdoor specification state. It is a schematic perspective view for demonstrating the assembly | attachment procedure in setting the antenna apparatus in embodiment of this invention to an indoor specification state. It is a schematic perspective view which shows the state which installed the said antenna apparatus horizontally in the outdoor specification state of the antenna apparatus in embodiment of this invention. It is a schematic perspective view which shows the state which installed the said antenna apparatus vertically in the outdoor specification state of the antenna apparatus in embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The antenna device according to the present embodiment can receive UHF television radio waves for digital terrestrial television broadcasting, and employs a so-called three-element Yagi antenna as an antenna element. Note that the antenna device according to the present embodiment is configured to be installed both outdoors and indoors, and when installed outdoors, a mast attachment described later is attached to the back of the antenna device housing. In the case of being installed on a wall and installed indoors, a stand, which will be described later, is installed on the back wall of the housing of the antenna device. Here, in this specification, the state in which the mast fixture is assembled to the back wall of the housing to enable the antenna device to be installed outdoors is referred to as “outdoor specification state”, and the antenna device is installed indoors. A state in which a stand is assembled to the back wall of the housing to make it possible is called an “indoor specification state”.

  1 to 4 are views showing an external structure of the antenna device according to the present embodiment in an outdoor specification state. FIG. 1 is a front perspective view, FIG. 2 is a rear perspective view, and FIG. 3 is a bottom view. 4 is a rear view. 5 and 6 are diagrams showing the internal structure of the antenna device according to the present embodiment in the outdoor specification state. FIG. 5 is a plan view of the antenna device with the upper case removed, and FIG. It is a schematic cross section along the VI-VI line shown in FIG. FIG. 7 is an exploded perspective view of the antenna device according to the present embodiment in an outdoor specification state, and FIG. 8 is a rear side perspective view of a patch of the antenna device according to the present embodiment. Further, FIG. 9 is an enlarged perspective view of the back side of the lower case to which the patch of the antenna device according to the present embodiment is fixed, and FIG. 10 is the rear side of the upper case of the antenna device according to the present embodiment. It is a principal part expansion perspective view. First, with reference to these FIG. 1 thru | or FIG. 10, the external appearance structure and internal structure in the outdoor specification state of the antenna apparatus in this Embodiment are demonstrated.

  As shown in FIG. 1 to FIG. 7, the antenna device 1 according to the present embodiment has a radiator 2 </ b> A, a waveguide 2 </ b> B and a reflector 2 </ b> C as antenna elements, The abutment tool 20, the male screw 24 as the first fixing means, the male screw 33 as the second fixing means, and the mast mounting tool 30 as the installation tool are mainly provided.

  As shown in FIGS. 1 to 7, the housing 10 includes a lower case 12, an upper case 14, and a front panel 16. The lower case 12, the upper case 14, and the front panel 16 are all formed by injection molding using a mold using an insulating resin material or the like as a raw material. The lower case 12 has a box shape with an upper surface opening, and the upper case 14 has a box shape with a lower surface opening. The front panel 16 has an elongated, generally flat plate shape.

  The lower case 12 and the upper case 14 are assembled so that their opening faces face each other, and are fixed using the male screw 18, the abutment tool 20, and the male screw 24 in this state, whereby a box-shaped housing 10. At that time, the front panel 16 is sandwiched and fixed between the lower case 12 and the upper case 14. As a result, a housing chamber for housing the antenna element is formed inside the housing 10. In addition, the front panel 16 is located in the front surface 10a of the housing | casing 10 after an assembly | attachment, and is for improving the aesthetics on a design.

  A hole 11 is formed in the housing 10 so as to penetrate from the upper surface to the lower surface of the housing 10. The hole 11 is for reducing a snow load applied to the housing 10 when the antenna device 1 is horizontally installed outdoors. In addition, the hole 11 is for making it easier to grip the housing 10 by hand when the antenna device 1 is installed, and for improving the aesthetic appearance of the design.

  A coaxial plug 3 is provided at a predetermined position on the lower surface of the housing 10. The coaxial connector 3 is a terminal for outputting a television broadcast signal after being converted into an electric signal by being received by the antenna element to an external tuner or the like. A coaxial cable (not shown) can be connected to the coaxial plug 3.

  As shown in FIGS. 5 to 7, the radiator 2 </ b> A, the waveguide 2 </ b> B, and the reflector 2 </ b> C constituting the antenna element are all disposed in the housing chamber of the housing 10. Here, since antenna device 1 in the present embodiment is a receiving device that receives radio waves arriving at itself using an antenna element, radiator 2A, waveguide 2B, and reflector 2C are all included. Used for receiving radio waves. Note that it is also possible to radiate radio waves using an antenna element having the same configuration as the antenna element in the present embodiment. In that case, the radiator 2A, the waveguide 2B, and the reflector 2C are all used. The antenna device is used for transmission of radio waves, whereby the antenna device is used as a transmission device.

  Radiator 2A is a part for receiving radio waves, and has a configuration equivalent to a so-called sleeve antenna. The radiator 2 </ b> A has an elongated, generally flat plate shape, and is disposed at a substantially central portion in the front-rear direction of the casing 10 with its pair of main surfaces facing the front-rear direction of the casing 10. Yes. Radiator 2A includes an insulating substrate in which flat and strip-like conductors are embedded, and a pair of flat sleeve conductors disposed opposite to the main surface of the insulating substrate where the strip-like conductor is embedded. Including. Of these, the sleeve conductor is formed, for example, by pressing a metal plate-like member. Note that the power feeding portion of the radiator 2 </ b> A is electrically connected to the coaxial plug 3 described above via the coaxial cable 4.

  The director 2B has a function of guiding incoming radio waves to the radiator 2A and is formed of a conductor. The director 2B has an elongated, generally flat plate shape, and is disposed at the front end in the front-rear direction of the casing 10 with its pair of main surfaces facing the front-rear direction of the casing 10. Yes. The director 2B is formed, for example, by pressing a metal plate member.

  The reflector 2C has a function of reflecting incoming radio waves to guide the radiator 2A, and is formed of a conductor. The reflector 2C has an elongated, generally flat plate shape, and is disposed at the rear end portion in the front-rear direction of the casing 10 with its pair of main surfaces facing the front-rear direction of the casing 10. Yes. The reflector 2C is formed, for example, by pressing a metal plate member.

  A pair of pressing protrusions 2C2 is provided at a substantially central portion in the longitudinal direction of the reflector 2C. The pressing protrusion 2C2 is formed by opening a substantially rectangular central portion of the reflector 2C into a substantially rectangular shape to form an opening 2C1, and a reflector that defines the left and right peripheral edges of the formed opening 2C1. It is configured by bending a part of 2C so as to protrude rearward (see FIG. 14).

  As described above, the radiator 2A, the waveguide 2B, and the reflector 2C that constitute the antenna element are sequentially arranged from the front end to the rear end of the casing 10 in the housing chamber of the casing 10. 2B, radiator 2A, and reflector 2C are arranged in this order. These radiator 2A, director 2B, and reflector 2C are all ribs provided on the lower case 12 and the upper case 14 of the housing 10. It is being fixed to case 10 by being held by etc.

  Note that a more detailed configuration of the antenna element in the present embodiment described above is disclosed in Japanese Patent Application No. 2008-222104 filed separately by the applicant of the present application.

  As shown in FIGS. 5 to 7, the abutment tool 20 is formed, for example, by pressing a metal plate-like member, and is disposed in the housing chamber of the housing 10. More specifically, the abutment tool 20 is arranged so as to be addressed along the inner and rear surfaces located on the accommodation chamber side of the back wall of the housing 10, and in the front-rear direction of the housing from the reflector 2 </ b> C described above. It is arranged further rearward along.

  As shown in FIG. 8, the abutment tool 20 has a substantially flat plate shape, and includes four positioning projections 21 projecting rearward from a predetermined position on the periphery thereof, and a flat plate portion. And a pair of first female screw portions 22 drilled at the left and right positions, and one second female screw portion 23 drilled at a substantially central portion of the flat plate portion. The four positioning projections 21 are arranged at equal intervals on the virtual circle.

  As shown in FIG. 9, an overlapping portion 12 a and a positioning projection 12 c are provided at predetermined positions on the back wall of the lower case 12. A pair of overlapping portions 12a are provided on the left and right of the positioning projection 12c, and each has a through hole 12b at a predetermined position. On the other hand, the positioning protrusion 12c is provided on the back wall of the lower case 12 so as to slightly protrude rearward from the main surface of the overlapping portion 12a described above, and is formed in the vicinity of the four corners. It has four insertion holes 12d and a through-hole 12e drilled at a substantially central portion thereof.

  As shown in FIG. 10, an overlapping portion 14 a and a positioning cutout portion 14 c are provided at predetermined positions on the back wall of the upper case 14. A pair of overlapping portions 14a are provided on the left and right of the positioning cutout portion 14c, and each has a through hole 14b at a predetermined position. On the other hand, the positioning cutout portion 14c is formed in a slit shape by cutting out a part of the back wall of the upper case 14 upward from the lower end thereof.

  On the other hand, as shown in FIGS. 1 to 7, the antenna device 1 is installed on the outer back surface (that is, the back surface 10b of the housing 10) located on the opposite side of the back wall of the housing 10 from the accommodation chamber side. A mast mounting tool 30 as an installation tool is assembled. The mast attachment 30 includes a mast receiving member 32 addressed along the back surface 10b of the housing 10, a mast pressing member 34 capable of holding the mast between the mast receiving member 32, and the mast receiving member 32. A pair of male screws 36 for fastening the mast pressing member 34 is included. Both the mast receiving member 32 and the mast pressing member 34 are formed by pressing a metal plate-like member, for example. The mast receiving member 32 has a substantially flat plate shape, and the mast presser member 34 has an elongated, generally flat plate shape.

  A pair of female screw portions 32a (see FIG. 17) is provided at a predetermined position of the flat plate portion corresponding to the addressed portion of the mast receiving member 32, and a predetermined position of the flat plate portion of the mast presser member 34 is provided. A pair of insertion holes 34a (see FIG. 17) is formed in the. Each of the pair of male screws 36 described above is inserted into each of the pair of insertion holes 34a provided in the mast holding member 34, and each of the pair of female screw portions 32a provided in the mast receiving member 32. The mast receiving member 32 and the mast presser member 34 are fastened by being screwed to each other, whereby the mast attachment 30 is configured.

  In addition, one through hole 32c (see FIG. 17) and four positioning holes 32b (see FIG. 17) are provided at predetermined positions of the flat plate-like portion of the mast receiving member 32. The four positioning holes 32b are arranged at equal intervals on a virtual circle having the same diameter as the virtual circle including the positioning protrusions 21 provided on the above-described patch 20 on the circumference. Further, each of the mast receiving member 32 and the mast pressing member 34 is provided with a standing wall portion formed by bending the periphery thereof, and a mast receiving recess for receiving the mast is provided at a predetermined position of the standing wall portion. 32d and 34b (see FIG. 17) are respectively formed.

  As shown in FIGS. 5 and 6, the positioning protrusion 12 c of the lower case 12 is fitted into the positioning notch 14 c of the upper case 14, and a pair of overlapping portions 12 a provided on the lower case 12. And a pair of overlapping portions 14a provided on the upper case 14 are overlapped in the front-rear direction of the housing 10 to form a pair of overlapping portions. The abutment tool 20 is in a state of being addressed to the inner and rear surfaces of the back wall of the housing 10 and is fixed to the back wall of the housing 10 by a male screw 24 as a first fixing means.

  More specifically, each of the pair of through-holes 12b provided in the lower case 12 described above, each of the pair of through-holes 14b provided in the upper case 14 described above, and the above-described patch 20 are provided. Each of the pair of first female screw portions 22 is configured to be aligned in a straight line, and the pair of through holes 12b and the pair of through holes 14b are respectively inserted through the pair of first female screw portions 22. A pair of male screws 24 are respectively inserted from the outside of the housing 10 and screwed into the pair of first female screw portions 22, whereby the lower case 12 and the upper case 14 are paired as described above. At the same time, the lower case 12 and the upper case 14 are fixed by screwing together, and at the same time, the abutment tool 20 is fixed to the back wall of the housing 10.

  The abutment tool 20 is assembled in a state of being sandwiched between the back wall of the housing 10 and the reflector 2C. Specifically, the flattened portion of the abutting tool 20 is addressed to the inner and rear surfaces of the back wall of the housing 10, and the flattened portion is formed by the pressing protrusion 2C2 provided on the reflector 2C described above. Is pressed toward the back wall of the housing 10 and is assembled while being sandwiched between the back wall of the housing 10 and the reflector 2C. Here, the pressing protrusion 2C2 provided on the reflector 2C described above functions as a pressing portion as a temporary fixing means for pressing and temporarily fixing the abutment tool 20 toward the inner back surface of the back wall of the housing 10. ing. The details of temporary fixing of the abutment tool 20 by the pressing protrusion 2C2 as the temporary fixing means will be described later.

  Further, each of the four positioning projections 21 of the abutment tool 20 protrudes rearward from the back surface 10 b of the housing 10. More specifically, each of the four positioning projections 21 provided on the above-described abutting tool 20 and each of the four insertion holes 12d provided on the above-described lower case 12 are arranged in a straight line. Each of the four positioning projections 21 is inserted into each of the four insertion holes 12d so that each of the four positioning projections 21 protrudes rearward from the back surface 10b of the housing 10. It is assumed that

  The mast receiving member 32 is in a state of being addressed to the outer rear surface of the back wall of the housing 10 and is fixed to the back wall of the housing 10 by a male screw 33 as a second fixing means. More specifically, the through-hole 12e provided in the lower case 12 described above, the through-hole 32c provided in the mast receiving member 32 described above, and the second female screw portion 23 provided in the abutting tool 20 described above. Are arranged in a straight line, and a male screw 33 is inserted from the rear of the mast receiving member 32 so as to pass through the through hole 12e and the through hole 32c, respectively, and the second female screw is inserted. By being engaged with the portion 23, the housing 10 and the mast receiving member 32 are sandwiched between the abutment tool 20 and the male screw 33, whereby the mast receiving member 32 is fixed to the housing 10.

  In addition, each of the four positioning holes 32b of the mast receiving member 32 is fitted into each of the four positioning protrusions 21 of the above-described pad 20 that protrudes from the housing 10. Thereby, the mast receiving member 32 is positioned with respect to the back wall of the housing 10.

  FIG. 11 is a rear perspective view showing the external structure of the antenna device according to the present embodiment in an indoor specification state, and FIG. 12 is a front perspective view showing the external structure of the stand of the antenna device according to the present embodiment. is there. Next, with reference to these FIG. 11 and FIG. 12, the external structure in the indoor specification state of the antenna device in the present embodiment will be described.

  As shown in FIG. 11, when the antenna device 1 according to the present embodiment is in an indoor specification state, the radiator 2A, the waveguide 2B and the reflector 2C as antenna elements, a housing 10, and a fitting 20, a male screw 24 as a first fixing means, a male screw 43 as a second fixing means, and a stand 40 as an installation tool. Here, the portions other than the stand 40 and the male screw 43 are the same as in the case where the antenna device 1 described above is in an outdoor specification state, and therefore the description thereof will not be repeated here.

  As shown in FIGS. 11 and 12, the stand 40 has a flat plate-shaped addressing portion 42 that is addressed along the back surface 10 b of the housing 10, and extends from the addressing portion 42, such as a table or a floor surface. And a flat plate-like pedestal portion 44 placed on the placement surface. The stand 40 is formed, for example, by injection molding using a mold using an insulating resin material or the like as a raw material, and has a substantially L-shape.

  One through hole 42 b and four positioning holes 42 a are provided at predetermined positions of the flat plate-shaped addressing portion 42 of the stand 40. The four positioning hole portions 42a are arranged at equal intervals on a virtual circle having the same diameter as the virtual circle including the positioning protrusion 21 provided on the abutment 20 on the circumference.

  The stand 40 is in a state where the addressing portion 42 is addressed to the outer back surface of the back wall of the housing 10, and is fixed to the back wall of the housing 10 by a male screw 43 as a second fixing means. Yes. More specifically, the through hole 12e provided in the lower case 12 described above, the through hole 42b provided in the stand 40 described above, and the second female screw portion 23 provided in the above-described patch 20 are as follows. Each of the second females is arranged in a straight line, and a male screw 43 is inserted from behind the addressing part 42 of the stand 40 so as to pass through the through hole 12e and the through hole 42b. The stand 40 is fixed to the housing 10 by being screwed into the screw portion 23 so that the housing 10 and the addressing portion 42 of the stand 40 are sandwiched by the abutment tool 20 and the male screw 33.

  In addition, each of the four positioning holes 42 a of the addressing portion 42 of the stand 40 is fitted into each of the four positioning protrusions 21 of the above-described application tool 20 that protrudes from the housing 10. Thereby, positioning with respect to the back wall of the housing | casing 10 of the stand 40 is performed.

  FIGS. 13 to 18 are schematic perspective views for explaining the assembly procedure of the antenna device according to the present embodiment. Among these, FIG. 17 is a schematic perspective view for explaining an assembly procedure when the antenna device according to the present embodiment is in an outdoor specification state, and FIG. 18 is an indoor specification of the antenna device according to the present embodiment. It is a schematic perspective view for demonstrating the assembly | attachment procedure in setting it as a state. Next, with reference to FIGS. 13 to 18, an assembly procedure of the antenna device according to the present embodiment will be described.

  When assembling the antenna device 1 according to the present embodiment described above, first, as shown in FIG. 13, the abutting tool 20 is applied along the inner and rear surfaces of the back wall of the lower case 12. At that time, the pad 20 is directed from the front to the back wall of the lower case 12 so that each of the four positioning projections 21 of the pad 20 is inserted into each of the four insertion holes 12 d of the lower case 12. Yeah.

  Next, as shown in FIG. 14, the reflector 2 </ b> C is assembled to the rear end portion of the lower case 12. At that time, the reflector 2C is assembled to the lower case 12 from above so that the reflector 2C is fitted along the inner and rear surfaces of the back wall of the lower case 12. As a result, the abutment tool 20 is pressed against the inner back surface of the back wall of the lower case 12 by the pressing protrusion 2C2 of the reflector 2C, and the abutment tool 20 is temporarily fixed to the back wall of the lower case 12. It will be.

  Subsequently, the radiator 2A, the director 2B, the coaxial connector 3, the coaxial cable 4, and the lower case of the front panel 16 are assembled, and then the upper case 14 is attached to the lower case 12 as shown in FIG. Assemble. At that time, the upper case 14 is assembled to the lower case 12 from above so that the positioning notch portion 14c of the upper case 14 is fitted to the positioning protrusion 12c of the lower case 12. Thereby, each of the pair of overlapping portions 12a of the lower case 12 and each of the pair of overlapping portions 14a of the upper case 14 are overlapped.

  Next, as shown in FIG. 16, the pair of male screws 24 are screwed into the pair of first female screw portions 22 of the abutment tool 20. At that time, a pair of male screws 24 are inserted from the rear of the housing 10 so as to be inserted through the pair of through holes 14b of the upper case 14 and the pair of through holes 12b of the lower case 12, respectively. Screwing. As a result, the lower case 12 and the upper case 14 are sandwiched by the abutment tool 20 and the pair of male screws 24 in the pair of overlapping portions described above, and are fixed by screwing using joint fastening of the lower case 12 and the upper case 14. At the same time, the abutment tool 20 is fixed to the back wall of the housing 10. In addition, the state in which each of the four positioning protrusions 21 of the abutment 20 is inserted into each of the four insertion holes 12d of the lower case 12 by temporary fixing to the back wall of the lower case 12 of the abutment 20 described above. Therefore, the abutting tool 20 does not rotate during the above-described screwing, and the screwing with the male screw 24 can be easily performed.

  Subsequently, in addition to fixing the lower case 12 and the upper case 14 by screwing using the above-described fitting 20 and a pair of male screws 24, the lower case 12 and the upper case by the pair of male screws 18 shown in FIG. The case 14 is fixed. The pair of male screws 18 are screwed by so-called screwing, in which the pair of male screws 18 are fixed to the upper case 14 with the lower case 12 interposed. As described above, the assembly of the portion excluding the installation tool of the antenna device 1 is completed.

  Next, as shown in FIG. 17, when the antenna device 1 is in an outdoor specification state, a mast attachment configured by fastening a mast receiving member 32 and a mast pressing member 34 in advance using a pair of male screws 36. The tool 30 is fixed to the back wall of the housing 10. At that time, the mast receiving member 32 is attached to the housing so that each of the four positioning holes 32b of the mast receiving member 32 is fitted to the four positioning protrusions 21 that protrude from the rear surface 10b of the housing 10. The mast fixture 30 is fixed to the housing 10 by screwing the male screw 33 into the second female screw portion 23 of the abutting tool 20 while maintaining this state. More specifically, the male screw 33 is inserted from behind the housing 10 so as to be inserted into the through hole 32c of the mast receiving member 32 and the through hole 12e of the lower case 12, and the above-described screwing is performed. Thereby, the housing | casing 10 and the mast receiving member 32 are pinched | interposed by the abutment tool 20 and the external thread 33, and the fixing by the screwing using the joint fastening of the housing | casing 10 and the mast receiving member 32 is performed. Since the abutting tool 20 is already fixed to the back wall of the housing 10 by the pair of male screws 24 described above, the abutting tool 20 does not rotate during the above-described screwing, and the screwing by the male screw 33 is performed. Can be done easily.

  As shown in FIG. 18, when the antenna device 1 is in an indoor specification state, the stand 40 is fixed to the back wall of the housing 10. At that time, the addressing portion 42 of the stand 40 is fitted in the housing 40 so that each of the four positioning holes 42a of the stand 40 is fitted into the four positioning projections 21 that protrude from the rear surface 10b of the housing 10. The stand 40 is fixed to the housing 10 by reaching the back surface 10b of the body 10 and screwing the male screw 43 into the second female screw portion 23 of the abutment tool 20 while maintaining this state. More specifically, the male screw 43 is inserted from behind the housing 10 so as to be inserted into the through hole 42b of the stand 40 and the through hole 12e of the lower case 12, and the above-described screwing is performed. As a result, the housing 10 and the addressing portion 42 of the stand 40 are sandwiched between the abutment tool 20 and the male screw 43, and fixing by screwing using joint fastening of the housing 10 and the stand 40 is performed. Since the abutting tool 20 is already fixed to the back wall of the housing 10 by the pair of male screws 24 described above, the abutting tool 20 does not rotate during the above-described screwing, and the screwing by the male screw 43 is performed. Can be done easily.

  Through the above assembly procedure, the assembly of the antenna device 1 in the present embodiment described above is completed.

  In the antenna device 1 according to the present embodiment described above, the overlap of the back wall of the casing 10 formed by overlapping the overlapping portion 12a of the lower case 12 and the overlapping portion 14a of the upper case 14 is performed. The housing is constituted by a fitting 20 addressed along the inner and rear surfaces of the back wall of the housing 10 and a male screw 24 as a first fixing means inserted from the outer rear surface side of the back wall of the housing 10. A fixing structure that is sandwiched and fixed in the front-rear direction of the body 10 is employed. Therefore, by adopting the above configuration, the lower case 12 and the upper case 14 are fixed by joint fastening using screw fastening, and the housing 10 is provided with high load resistance and is robust. An antenna device having a structure can be obtained.

  Here, after the lower case 12 and the upper case 14 are assembled, the casing 10 is in a hermetically sealed state, and the pad 20 cannot be applied to the inner and rear surfaces of the back wall of the casing 10, and thus the above-described case. Thus, the lower case 12 and the upper case 14 cannot be fixed by tightening together. Therefore, in the antenna device 1 according to the present embodiment, prior to assembling the lower case 12 and the upper case 14, the abutment tool 20 is preliminarily applied to the inner back surface of the back wall of the lower case 12, The reflector 20 </ b> C assembled to the lower case 12 is used as a pressing portion as temporary fixing means to temporarily fix the abutment tool 20 in a state of being directed to the inner back surface of the back wall of the lower case 12. Therefore, even after the lower case 12 and the upper case 14 are assembled, the state in which the patch 20 is addressed to the inner and rear surfaces of the back wall of the housing 10 is maintained, and the first fixing described above is performed. The lower case 12 and the upper case 14 can be fixed together by using a male screw 24 as a means. Therefore, it is possible to provide an antenna device having high load resistance at a low cost by a very simple assembling work without increasing the number of parts or requiring a complicated assembling work.

  Further, by fixing the lower case 12 and the upper case 14 using the abutting tool 20 and the male screw 24, the abutting tool 20 addressed along the inner and rear surfaces of the back wall of the housing 10 can be simultaneously removed. It can also be fixed to the housing 10. Therefore, the mast attachment 30 or the stand 40 using the abutment tool 20 can be attached also when the mast attachment 30 or the stand 40 as an installation tool is assembled to the housing 10 thereafter. Specifically, as an assembly structure of the mast attachment 30 or the stand 40 with respect to the housing 10, the addressing portion 42 of the mast receiving member 32 or the stand 40 and the back wall of the housing 10 are used as the back wall of the housing 10. And the male screw 33 or the male screw 43 as the second fixing means inserted from behind the addressing portion 42 of the mast receiving member 32 or the stand 40 and sandwiched in the front-rear direction of the housing 10. It is possible to adopt a fixing structure that is fixed with Therefore, by adopting the above configuration, the assembly of the mast mounting tool 30 or the stand 40 to the housing 10 can be realized by joint fastening using screw fastening, and the housing 10 and the mast mounting tool 30 or the stand 40 can be realized. It is possible to provide an antenna device having a robust structure in which high load-bearing performance is imparted to the fixing of the antenna.

  As described above, by using the antenna device 1 as in the present embodiment, the load bearing performance can be reduced with a small number of parts such as the abutment tool 20, the pair of male screws 24, and the single male screw 33 or male screw 43. It is possible to easily and inexpensively manufacture an antenna device having a robust structure excellent in the above.

  In the outdoor specification state of the antenna device 1 according to the present embodiment, the positioning tool 21 is provided with four positioning projections 21 and the mast receiving member 32 is provided with four positioning holes 32b. The mast attachment 30 is positioned with respect to the housing 10 by fitting. Here, as described above, each of the four positioning protrusions 21 and the four positioning holes 32b are provided at equal intervals on a virtual circle having the same diameter. Therefore, it is possible to change the assembly angle of the mast fixture 30 with respect to the housing 10 by changing the combination of the fitting of the four positioning holes 32b to the four positioning protrusions 21. The assembling angle here means an angle in a plane orthogonal to the assembling direction of the mast fixture 30 with respect to the housing 10, and the assembling angle can be varied every 90 ° by adopting the above configuration. It becomes.

  19 and 20 show a case where the antenna device is installed either horizontally or vertically in the outdoor specification state of the antenna device in the present embodiment by changing the assembly angle of the mast fixture described above. FIG. 19 is a schematic perspective view when the antenna device is installed horizontally, and FIG. 20 is a schematic perspective view when the antenna device is installed vertically.

  As shown in FIG. 19 and FIG. 20, the antenna device 1 is installed by being attached to a mast 100 erected in a columnar shape by a mast attachment 30 attached to the back wall of the housing 10. Here, the mast fixture 30 is attached to the mast 100 by being sandwiched between a mast receiving member 32 and a mast pressing member 34 fastened by a pair of male screws 36. At that time, the front end portion of the mast 100 is fitted into the mast receiving recess 32d (see FIG. 17) of the mast receiving member 32 so that the mast mounting tool 30 is stably fixed to the mast 100. The end portion is fitted into the mast receiving recess 34b (see FIG. 17) of the mast pressing member 34.

  In the state where the antenna device 1 is installed horizontally as shown in FIG. 19, it becomes possible to receive horizontal polarization with high efficiency, and in the state where the antenna device 1 is installed vertically as shown in FIG. Can receive vertically polarized waves with high efficiency. Therefore, in the antenna device 1 according to the present embodiment, by changing the assembly angle of the mast fixture 30 with respect to the casing 10 by 90 °, both horizontal polarization and vertical polarization are received in a good reception state. Is possible.

  In the present embodiment described above, the antenna device using the reflector as the temporary fixing means has been described as an example. However, the temporary fixing means is not limited to this reflector. In addition, other parts assembled in the housing chamber of the housing may be used as the temporary fixing means, or a locking means such as a screw may be used as the temporary fixing means. Further, in the above-described embodiment, the case where the pressing unit that presses and fixes the abutting tool toward the back wall of the casing is used as the temporary fixing means has been described as an example. It is good also as temporarily fixing, without pressing toward the back wall of a body. As an example, it is conceivable to use an adhesive or the like as the temporary fixing means.

  In the above-described embodiment, the antenna device using a three-element Yagi antenna as an antenna element has been described as an example. However, an antenna element such as a loop antenna may be used. In this case, it is preferable to use the loop antenna as a fixing means.

  In the above-described embodiment, an antenna device capable of receiving UHF television radio waves for digital terrestrial television broadcasting has been described as an example. However, the antenna device may be a receiving device that receives other radio waves, It is good also as a transmission device which radiates.

  Further, in the present embodiment described above, an explanation has been given by exemplifying an outdoor installation type or indoor installation type antenna device using a mast attachment or a stand as the installation tool, but only the mast attachment is used as the installation tool. An outdoor installation type antenna device may be used, or an indoor installation type antenna device using only a stand as an installation tool.

  Thus, the one embodiment disclosed this time is illustrative in all respects and not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Antenna apparatus, 2A radiator, 2B director, 2C reflector, 2C1 opening part, 2C2 pressing protrusion part, 3 coaxial plug, 4 coaxial cable, 10 housing | casing, 10a front surface, 10b back surface, 11 hole part, 12 lower case, 12a overlapped portion, 12b through hole, 12c positioning projection, 12d insertion hole, 12e through hole, 14 upper case, 14a overlapping portion, 14b through hole, 14c positioning notch, 16 front panel , 18 male screw, 20 abutment tool, 21 positioning protrusion, 22 first female screw part, 23 second female screw part, 24 male screw, 30 mast fitting, 32 mast receiving member, 32a female screw part, 32b positioning Hole, 32c through hole, 32d mast receiving recess, 33 male screw, 34 mast pressing member, 34a insertion hole, 34 b Mast receiving recess, 36 male screw, 40 stand, 42 addressing part, 42a positioning hole, 42b through hole, 43 male screw, 44 pedestal part, 100 mast.

Claims (9)

An antenna element for at least transmitting or receiving radio waves;
A housing including a storage chamber in which the antenna element is stored;
An installation tool attached to the back wall of the housing;
Assembly means for assembling the installation tool to the back wall of the housing;
The housing includes a lower case with an upper opening and an upper case with a lower opening,
The back wall of the housing has an overlapping portion where the lower case and the upper case overlap in the front-rear direction of the housing,
The installation tool has at least an addressing part addressed along an outer back surface located on the opposite side of the back wall of the housing from the accommodation chamber side,
The assembling means is configured such that the overlapping portion of the back wall of the casing is between the abutting tool addressed along the inner and rear surfaces located on the accommodation chamber side of the back wall of the casing and the abutting tool. A first fixing means for fixing the lower case and the upper case by sandwiching the upper case and fixing the abutting device to the back wall of the housing, and the back wall of the housing between the abutting device and the A second fixing means for fixing the installation tool to the back wall of the housing by sandwiching the addressing portion of the installation tool;
In fixing the lower case and the upper case and fixing the pad to the back wall of the housing using the pad and the first fixing means, the pad is previously attached to the back of the housing. An antenna further comprising temporary fixing means for fixing the abutment tool to the back wall of the housing using the first fixing means by temporarily fixing the wall to the inner and rear surfaces. apparatus.   The antenna device according to claim 1, wherein the temporary fixing means is configured by a pressing portion that presses and temporarily fixes the abutment toward the inner back surface of the back wall of the housing.   The antenna device according to claim 2, wherein the pressing portion is configured by the antenna element that is assembled to the housing. The antenna element includes a radiator, a director, and a reflector,
The pressing portion is configured by the reflector that is disposed at a position closest to the back wall of the casing in the housing chamber of the casing among the radiator, the waveguide, and the reflector. The antenna device according to claim 3, wherein The installation tool includes a mast receiving member addressed along the outer back surface of the back wall of the housing, and a mast pressing member capable of sandwiching the mast between the mast receiving member,
The antenna device according to any one of claims 1 to 4, wherein the addressing portion is configured by the mast receiving member.   The antenna device according to claim 1, wherein the installation tool further includes a pedestal portion that extends from the addressing portion and is placed on a placement surface in addition to the addressing portion. . The first fixing means and the second fixing means are both male threads,
The antenna device according to any one of claims 1 to 6, wherein a female screw portion that is screwed into the male screw is provided in the patch. A plurality of protrusions are provided on the pad.
The installation tool is provided with a plurality of holes that can be fitted into the plurality of protrusions,
The antenna device according to claim 1, wherein the installation tool is positioned with respect to the housing by fitting the plurality of holes into the plurality of protrusions. The plurality of protrusions and the plurality of holes are each four.
The plurality of protrusions are disposed at equal intervals on the first virtual circle,
The antenna device according to claim 8, wherein the plurality of hole portions are arranged at equal intervals on a second virtual circle having the same diameter as the first virtual circle.

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