JP5608134B2 - Antenna device - Google Patents

Description

  The present invention relates to an antenna device.

  Patent Document 1 discloses a technique for attaching an antenna portion and a transmission path trap portion to the outer surface of an existing conductive ridge while leaving the existing conductive ridge intact.

  The antenna portion is formed of a synthetic resin that has been subjected to a metal plate or a conductive coating so that it can be attached after the construction of the ridge. The antenna unit is configured by combining two antenna element bodies each provided with a semi-cylindrical power feeding unit on the side of the semi-cylindrical folded portion.

  Further, the transmission path trap portion is provided so that the conductive rod does not disturb the operation of the antenna portion when the antenna portion is attached to the existing conductive rod. This transmission line trap part is comprised by the double cylinder structure which combined two halves.

  The antenna part has two folded back portions of the antenna element body on the outer surface side of the longitudinal middle part of the existing conductive ridges, and the ridges protruding outward on the left and right sides of the antenna element body Are fixed by screws, and the two antenna elements are connected to each other and attached to an existing bag.

  The transmission path trap part has two halves arranged at the upper and lower positions of the antenna part, and the two halves are fixed by screwing the joining pieces protruding upward and downward of the half part. Connected and attached to the fence.

JP-A-1-168101

  However, in the conventional example shown in Patent Document 1, the portion where the antenna portion is attached to the heel, that is, the portion where the ridges protruding outward on both sides of the antenna element body are fixed with screws are exposed on the front side of the heel, Moreover, it protrudes on both the left and right sides.

  Moreover, the part which attaches a transmission-line trap part to a cage | basket, ie, the part which fixes the joining pieces which protruded up and down of the half-divided body with a screw, is exposed to the front side of a cage | basket.

  Thus, since the part which fixes ridges with a screw and the part which fixes joining pieces with a screw are exposed to the front side of a heel, an external appearance is bad.

  In particular, there is a problem that a person or an object is easily caught because a portion where the heels are fixed with screws protrudes to the left and right sides and is exposed.

An object of the present invention, assembled easily performed, also is to provide an antenna device in which the mounting portion can be mounted so as not to be exposed to vertical trough.

The antenna device of the present invention includes a metal thin plate having an antenna pattern formed by slots elongated in the axial direction of the ridge, a surface side cover formed of an electrically insulating material covering the surface side of the metal thin plate, and the metal thin plate. A front-side cover separate from the front-side cover formed of an electrically insulating material that covers the back-side, and the front-side cover in a state where the metal thin plate is sandwiched between the front-side cover and the back-side cover. the back side cover is connected by a connecting means, characterized in that the mounting portion for mounting the vertical trough on the back surface of the back side cover is provided.

It is preferred that metallic sheet is covered with a protective sheet.

In the present invention, the structure of the antenna device is simplified and easy because the front side cover and the rear side cover are connected by the connecting means in a state where the thin metal plate having the antenna pattern is sandwiched between the front side cover and the rear side cover. Assembled. Further, since the mounting portions for mounting the vertical trough on the back of the rear cover is provided, the antenna apparatus can be attached to the vertical trough. In addition, the attachment portion is hidden by the back side cover so that it is difficult to see from the front side, the appearance is difficult to be damaged, and people and objects are not easily caught on the attachment portion.

It is a disassembled perspective view of the antenna apparatus of this invention. (A) is a perspective view from the front side of the antenna apparatus same as the above, (b) is a perspective view from the back side. (A) is a cross-sectional view of the above, and (b) is an enlarged vertical cross-sectional view broken away by one minute. It is a disassembled perspective view before attaching the antenna apparatus same as the above to a bag. It is a longitudinal cross-sectional view of the state which attached the antenna apparatus same as the above to the cage. It is a cross-sectional view same as the above. (A) is sectional drawing which shows the state in which the left end of the antenna board same as the above hits the connection part of a hook attachment, and (b) is sectional drawing which shows the state in which the right end of an antenna board hits the connection part of a hook attachment is there. It is a disassembled perspective view before attaching the antenna apparatus same as the above to a pole. It is a longitudinal cross-sectional view of the state which attached the antenna apparatus same as the above to a pole. It is a cross-sectional view same as the above. It is a disassembled perspective view of other embodiment of the antenna apparatus of this invention. It is an enlarged vertical sectional view in which the same was broken. It is a disassembled perspective view of other embodiment of the antenna apparatus of this invention. It is sectional drawing which shows the part which attaches a collar attaching part same as the above to the back surface of a main-body part. It is sectional drawing of other embodiment which attaches a collar attaching part same as the above to the back surface of a main-body part.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  1 to 3 show an embodiment of an antenna device 1. The antenna device 1 includes a thin metal plate 2 having an antenna pattern, a front surface side cover 3 that covers the front surface side of the thin metal plate 2, and a rear surface side cover that is separate from the front surface side cover 3 that covers the rear surface side of the thin metal plate 2. 4 is provided.

  The thin metal plate 2 is made of a thin conductive metal plate or metal foil having a vertically long rectangular shape, and has an elongated slot 5 serving as an antenna pattern.

  The metal thin plate 2 provided with the slot 5 may be used alone or may be covered with a non-conductive protective sheet 6. Since the metal sheet 2 covered with the protective sheet 6 is suppressed from generating rust, and the slot 5 is provided, the metal sheet 2 is suppressed from being deformed at the slot 5 portion. The metal thin plate 2 provided with the slot 5 can be easily handled.

  In FIG. 1 and FIG. 2, a plurality of slots 5 of the metal thin plate 2 are provided side by side in the vertical direction, and adjacent slots 5 are connected by a narrow groove 9. Each slot 5 is formed in a bow tie shape in which the vertices of a triangle are abutted with each other.

  The thin metal plate 2 in which the elongated slot 5 serving as an antenna pattern is formed includes a first receiving unit 10 that receives radio waves in a first frequency band (for example, 473 to 600 MHz) and a second frequency band (for example, 600 to 720 MHz). ) Is received.

  The first receiving unit 10 includes a slot 5 and a peripheral portion of the slot 5. The second receiving unit 11 is constituted by a thin metal plate 2 portion adjacent to the slot 5 in the vertical direction.

  The length of the slot 5 constituting the first receiving unit 10 in the vertical direction is determined according to the length of the electrical half wavelength of the radio wave in the first frequency band. In addition, the circumferential length of the second receiving unit 11 is determined in accordance with the length of the electrical half wavelength of the radio wave in the second frequency band.

  The apex portions of the triangles on both sides of the slot 5 of the metal thin plate 2 serve as the power feeding portions 12 respectively. A power supply cable (not shown) is connected to the power supply unit 12.

  The front side cover 3 is formed of a nonconductive material such as a nonconductive synthetic resin.

  The back surface side cover 4 is formed of a non-conductive material such as a non-conductive synthetic resin, and a mounting portion 7 for mounting on a pole or a collar is provided on the back surface.

  The thin metal plate 2 having the antenna pattern is interposed and sandwiched between the front surface side cover 3 and the rear surface side cover 4, and in this state, the front surface side cover 3 and the rear surface side cover 4 are connected by a connecting means.

  By connecting and assembling the front surface side cover 3 and the back surface side cover 4, an antenna outer unit 8 having a substantially plate shape bent in a substantially flat plate shape, a cross-sectional arc shape, or a substantially plate shape bent in a substantially U-shaped cross section is configured. .

  1 to 3 show an example of a substantially plate-shaped antenna outer unit 8 bent in an arc shape in cross section.

  In this example, the front surface side cover 3 is formed in an arc shape in cross section with an electric insulating material such as an electric insulating synthetic resin, and a wall portion 13 projects from the outer peripheral edge portion toward the back, and further includes a plurality of engagement members. A pawl 14 is projected.

  The back surface side cover 4 is formed in an electric arc insulating material such as an electrically insulative synthetic resin in an arc shape in cross section, and has a size that fits snugly into a portion surrounded by the wall portion 13 on the back surface of the front surface side cover 3. In addition, a plurality of locking holes 15 are formed.

  The thin metal plate 2 provided with the slots 5 is disposed in a portion surrounded by the wall portion 13 on the back surface of the front surface side cover 3. In this case, the metal thin plate 2 having the slot 5 may be disposed alone, or the metal thin plate 2 having the slot 5 covered with the non-conductive protective sheet 6 may be disposed.

  Furthermore, the back surface side cover 4 is disposed in a portion surrounded by the wall 13 on the back surface of the front surface side cover 3 through the thin metal plate 2, and the locking claw 14 is locked to the locking hole 15, thereby The side cover 3 and the back side cover 4 are connected.

  Thus, the metal thin plate 2 is sandwiched between the front surface side cover 3 and the back surface side cover 4 and is disposed in the antenna outer unit 8 configured by assembling the front surface side cover 3 and the back surface side cover 4. .

  As shown in FIG. 3B, it is preferable that a vent hole 23 is formed in the front surface side cover 3 or the back surface side cover 4. As described above, when the vent hole 23 is formed, the back side cover 4 is overlapped with the metal plate 2 having the slot 5 on the portion surrounded by the wall portion 13 of the front side cover 3 and connected as described above. When doing so, the air in the overlapping portion can be taken out from the vent hole 23, and assembly can be facilitated. Of course, the vent hole 23 may not be provided.

  In this example, the connecting means for connecting the front surface side cover 3 and the back surface side cover 4 is constituted by a locking claw 14 and a locking hole 15.

  The attachment portion 7 provided on the back surface of the back surface side cover 4 may be partly or entirely formed integrally with the back surface side cover 4, or the attachment portion 7 is formed separately from the back surface side cover 4 and bonded. Further, it may be fixed to the back surface of the back surface side cover 4 by any fixing means such as a fixing tool such as a screw or fixing by locking.

  The attachment portion 7 is formed of a nonconductive material such as a nonconductive synthetic resin. In addition, the attachment portion 7 is configured by connecting one end portions of a pair of half bodies 16 so as to be rotatable by a bearing portion 17, and is engaged with a locking portion 18 at the other end portion of the pair of half bodies 16. The part 19 is freely lockable. In the embodiment of FIG. 3A, an example of a substantially semicircular half body 16 is shown.

  The antenna device 1 having the above configuration is attached to a gutter 22 or a pole 20 attached to an outer wall 21 of a building.

  FIGS. 4 to 7 show an example in which the antenna device 1 is attached to the flange 22, and FIGS. 8 to 10 show examples in which the antenna device 1 is attached to the pole 20.

  When mounting the antenna device 1, the locking portion 18 and the locked portion 19 are locked with the pair of halves 16 enclosing the outer periphery of an arbitrary position in the vertical direction of the pole 20 or the flange 22. Accordingly, as shown in the examples of FIGS. 9 and 10 and FIGS. 5 and 6, the antenna device 1 is attached to the poles 20 or 22 by strongly tightening the outer periphery of the poles 20 or the flanges 22 with the pair of halves 16. Mounted on.

  Since the mounting portion 7 protruding from the back surface of the back side cover 4 of the antenna outer unit 8 is attached to the pole 20 or the flange 22 in this way, the mounting portion 7 is hidden by the antenna outer unit 8 and is difficult to see from the front side. It is hard to damage. Further, since the attachment portion 7 does not protrude to the left or right side of the antenna device 1, it is difficult for a person or an object to be caught on the attachment portion 7.

  Further, since the attachment portion 7 is nonconductive, the attachment portion 7 does not affect the antenna performance of the antenna device 1 even if the attachment portion 7 protrudes from the back surface of the back cover 4 of the antenna outer unit 8.

  Here, when the pole 20 or the flange 22 is cylindrical, the attachment portion 7 is attached to the outer periphery of the pole 20 or the flange 22 so as to be rotatable in the circumferential direction. Therefore, by rotating the mounting portion 7 in the circumferential direction of the pole 20 or the flange 22, the direction of the antenna device 1 can be changed, and the receiving direction of the antenna device 1 can be adjusted.

  When adjusting the orientation of the antenna device 1, the mounting portion 7 is rotated in a state where the locking portion 18 and the locked portion 19 are unlocked, and after the adjustment of the receiving direction is completed, the locking portion 18 and the locked portion are closed. The locking part 19 is locked and the outer periphery of the pole 20 or the rod 22 is strongly tightened by the pair of halves 16.

  As a result, the antenna device 1 is mounted at an arbitrary position in the vertical direction of the pole 20 or the rod 22 and in a state facing the best receiving direction according to the site, and is attached by tightening firmly, so that the best reception is achieved. The state of facing the direction is maintained, and downward displacement is suppressed.

  As described above, the antenna device 1 is attached to an arbitrary position in the vertical direction of the pole 20 or the flange 22.

  By the way, the cage 22 is attached to the outer wall 21 of the building by the cage fixture 24. The scissor attachment 24 connects the scissor support part 25 that supports the outer peripheral part of the scissors 22, the outer wall fixing part 26 for fixing to the outer wall 21, and the scissor support part 25 and the outer wall fixing part 26. And a connecting portion 27.

  The heel support portion 25 is configured by connecting one end portions of a pair of heel support halves 28 so as to be rotatable by a bearing portion, and a locking portion at the other end of the pair of heel support halves 28. The locked portion is freely lockable.

  The scissor attachment 24 is configured such that the outer wall fixing part 26 is fixed to the outer wall 21 and the locking part and the locked part are locked with the pair of scissors supporting halves 28 surrounding the outer periphery of the scissors 22. Then, the heel 22 is supported.

  And when attaching the antenna apparatus 1 to the eaves 22, it is preferable to attach so that the lower end of the attachment part 7 may contact the upper end of the eaves support part 25 of the eaves attachment 24 like FIG.

  In this case, the connecting portion 27 of the saddle fitting 24 is located in the gap between the left and right edges of the antenna outer unit 8 having a circular arc cross section of the antenna device 1, and the antenna device 1 is not obstructed by the saddle fitting 24. Mounted.

  In this example, since the lower end of the attachment portion 7 hits the upper end of the heel support portion 25, the downward displacement of the attachment portion 7 is more reliably prevented, and the antenna device 1 is not displaced downward.

  Even when the attachment portion 7 is attached so that the lower end of the attachment portion 7 hits the upper end of the rod support portion 25 and the attachment portion 7 does not shift downward, the attachment portion 7 can rotate by a predetermined angle in the circumferential direction of the flange 22. The orientation of the device 1 can be changed.

  For this reason, the gap dimension between the left and right edges of the antenna outer unit 8 having a circular arc cross section is such that the hook fixture 24 is positioned in the gap between the left and right edges of the antenna outer unit 8. The clearance dimension is set so as to allow a predetermined angle of rotation based on the rotation with respect to 22.

  The rotation at the predetermined angle refers to the state where the left end of the antenna outer unit 8 shown in FIG. 7A is in contact with the connecting portion 27 of the rod attachment 24 and the right end of the antenna outer unit 8 shown in FIG. Is a rotation angle until the state hits the connecting portion 27 of the rod attachment 24.

  An example of the rotation angle is ± 45 ° in the left-right direction. In this example, the opening angle between the left and right edges of the antenna outer unit 8 having a circular arc cross section is 90 °. Of course, the opening angle between the left and right edges of the antenna outer unit 8 is not limited to 90 °.

  FIG. 11 and FIG. 12 show another example of the antenna outer unit 8 configured by combining and combining the front surface side cover 3 and the rear surface side cover 4 which is separate from the front surface side cover 3.

  In this example, a boss 30 is formed on the back surface of the front surface side cover 3, and a hole 31 is formed in the back surface side cover 4.

  The thin metal plate 2 having the slot 5 is covered with a non-conductive protective sheet 6, and a hole 32 is formed in a portion of the end of the protective sheet 6 that does not overlap the thin metal plate 2.

  The thin metal plate 2 having the slots 5 covered with the protective sheet 6 is disposed on the back surface of the front surface side cover 3 and the holes 32 are fitted into the bosses 30. In this state, the back surface side cover 4 is disposed on the back surface of the front surface side cover 3, and a screw 33 is inserted from the hole 31 of the back surface side cover 4 and screwed into the boss 30. It is sandwiched between the cover 3 and the back side cover 4 and is disposed in the antenna outer unit 8.

  In this example, the metal thin plate 2 having the slot 5 covered with the protective sheet 6 is temporarily fixed at a predetermined position on the back surface of the front surface side cover 3 without being loosened. Since 4 is fixed, assembly is easy and accurate.

  It should be noted that forming the antenna outer unit 8 by combining the front cover 3 and the back cover 4 to form the antenna outer unit 8 is not limited to the above-described examples, and other combined connection configurations are possible.

  FIG. 13 and FIG. 14 show an example of fixing means for fixing the attachment portion 7 to the back surface of the antenna outer unit 8.

  In this example, a fitting groove portion 40 is formed on the back surface of the antenna outer unit 8, and a fitting portion 41 provided in the attachment portion 7 is fitted into and attached to this fitting groove portion 40.

  The groove inside the fitting groove 40 is formed such that the left and right length is equal to or longer than the vertical width, and an opening 42 communicating with the groove in the fitting groove 40 is formed on the back surface of the fitting groove 40. Is done. The opening width (vertical width) of the opening 42 is formed narrower than the vertical width in the fitting groove 40, and the horizontal length of the opening 42 is the same as or longer than the vertical width in the fitting groove 40. It is formed.

  The fitting portion 41 includes a protruding base portion 43 from the mounting portion 7 and a plate-like protruding portion 44 that is integrally formed at the tip of the protruding base portion 43. The plate-like protrusion 44 is formed in an elongated rectangular shape in the vertical direction. The rectangular plate-like protrusion 44 is formed so that the length of the long side is longer than the left and right width of the opening 42 and is equal to or shorter than the vertical width of the groove in the fitting groove 40, and the length of the short side is the opening. It is formed shorter than the vertical width of 42, and the thickness is substantially the same as the groove depth of the groove in the fitting portion 41.

  The plate-like protrusion 44 is fitted into the fitting groove 40 through the opening 42 in such a posture that the long side faces the left and right direction, and then fitted by rotating so that the long side faces the up and down direction. It is attached so as not to come off in the groove 40.

  Here, the plate-like protrusion 44 has a chamfered portion 45 formed by chamfering a corner portion located on a pair of diagonal lines, and when the plate-like protrusion 44 rotates in the opening 42 as described above. The operation in which the long side faces in the vertical direction can be smoothly performed, and the short side can be pressed against the upper and lower surfaces in the groove in the opening 42.

  In this example, the antenna outer unit 8 may be integrally formed, or a combination of the front side cover 3 and the rear side cover 4 may be combined. In the latter case, the groove 40 is fitted into the rear side cover 4. Is formed.

  FIG. 15 shows another example of fixing means for fixing the mounting portion 7 of the antenna device 1 to the back surface of the antenna outer unit 8.

  In this example, the antenna outer unit 8 is configured by combining and coupling the front surface side cover 3 and the rear surface side cover 4, and the mounting portion 7 is fixed to the rear surface side cover 4 with screws 33.

  Of course, the fixing means for fixing the mounting portion 7 to the back surface of the antenna outer unit 8 is not limited to the above example, and any other various fixing means including fixing by locking can be adopted.

DESCRIPTION OF SYMBOLS 1 Antenna apparatus 2 Metal thin plate 3 Front side cover 4 Back side cover 5 Slot 6 Protection sheet 7 Attaching part 20 Pole 22 竪 樋

Claims (2)

A metal thin plate having an antenna pattern formed by slots elongated in the axial direction of the flange, a surface-side cover formed of an electric insulating material covering the surface side of the metal thin plate, and an electric insulating material covering the back side of the metal thin plate The front cover and the back cover are connected to each other in a state where the metal thin plate is sandwiched between the front cover and the back cover. in coupled, antenna apparatus characterized by attachment portions for attachment to vertical trough on the back surface of the back side cover is provided. The antenna device according to claim 1, wherein the metallic thin plate is covered with a protective sheet.

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