JPH0411371Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a television antenna.

``Prior Art'' In desert areas, the rod element is accommodated in the guide groove without any gap between the tips of the support walls that constitute the guide groove of the rod element. Then,
Very fine sand from desert areas sometimes entered the guide grooves and interfered with the expansion and contraction of the rod elements. In order to solve this problem, the first
As shown in Figure 2, a guide groove for the rod element was formed to remove sand from the guide groove.

The antenna housing 101 has an approximately pentagonal shape in plan view as shown in FIG. 7, and has an upper housing 102 and a lower housing 10 as shown in FIGS. 8, 9, and 10.
3 and the openings are brought into contact with each other. Upper housing 10
A guide groove 108 is formed by extending support walls 106 and 107 whose tips are bent in an arc toward the other side from the base surface 104 of the second housing 2 and the base surface 105 of the lower housing 103, respectively. A rod element 109 is accommodated in this guide groove 108, and a power supply lug 111, to which a power supply line 110 is connected to the base end of the rod element 109, is screwed onto a seat portion 113 with a mounting screw 112. The rod element 109 housed in the guide groove 108 is expanded or contracted. Note that the upper housing 102 and the lower housing 103 have the same structure except for the seat portion 113.

“Problem that the invention attempts to solve” The outer periphery of the antenna housing 101 is formed by a guide groove 108.
A waterproof wall 114 as shown in the figure is provided, and the end surfaces are brought into contact with each other to form a watertight structure. Therefore, there is no need to provide a waterproof wall outside the rod element 109, the amount of material used is reduced, and it is also extremely effective in terms of design, so the support wall 106 and the support wall A gap L is provided between the tips of 107.

The rod element 109, which is used after being extended, is
When a load such as wind pressure is applied to the gap L between the support wall 106 and the support wall 107 (in the direction of the arrow A in FIG. 10), the force of the rod element 109 moving in the A direction causes the support wall 106 and the support wall 107 to The supporting walls 107 are deformed in the vertical direction, and the rod elements 109 come out of the guide grooves 108, resulting in damage and loss of function as a television antenna.

Since the supporting walls 106 and 107 are made of synthetic resin, they are not very strong against deformation in the vertical direction, and in order to further increase the strength, the supporting walls 10
If the thickness of only the 6,107 portion was made thicker, there were problems in that sink marks (dents) would occur on the surface of the casing, and the weight would become heavier and the cost would also increase.

``Problems that the invention aims to solve'' Therefore, in view of the above circumstances, the present invention was designed to be not too heavy, to have no design problems, and to prevent the rod element from coming off the guide groove. In order to achieve this, a locking wall is provided extending from the support wall on the tip side of the guide groove to abut against the other support wall.

``Operation'' Since there is a locking wall on the tip side of the guide groove, the rod element will not come off from the guide groove even if a load is applied to the elongated rod element in the direction of the gap.

"Example" A specific embodiment of the present invention is shown in FIGS. 1-6.

The antenna housing 1 has an approximately pentagonal shape in plan view as shown in FIG.
As shown in the figure, the openings of an upper housing 2 and a lower housing 3 are brought into contact with each other. Support walls 6 and 7 each extending from the base surface 4 of the upper casing 2 and the base surface 5 of the lower casing 3 in an arc shape toward the other end are provided to form a guide groove 8.
form. A rod element 9 is accommodated in this guide groove 8, and a power supply lug 11, to which a power supply line 10 is connected to the base end of the rod element 9, is screwed onto the seat portion 13 with a mounting screw 12. The rod element 9 accommodated in the guide groove 8 is expanded or contracted. Further, the outer peripheral portion of the antenna housing 1 is provided with a waterproof wall 14 seen in the guide groove 8, and the end surfaces are brought into contact with each other to form a watertight structure.

Here, the support wall 7 of the lower casing 3 on the tip side of the guide groove 8
A locking wall 15 that comes into contact with the support wall 6 of the upper housing 2 is extended. Although this embodiment describes an example in which the locking wall 15 is extended to the lower casing 3, the locking wall 15 may be freely provided to the upper casing 2. In addition, upper housing 2
and the lower housing 3 have the same structure except for the seat portion 13 and the locking wall 15.

When the extended rod element 9 is subjected to a load such as wind pressure in the direction of the gap L between the support wall 6 and the support wall 7 (in the direction of the arrow A in FIG. 4), the movement of the rod element 9 is prevented by the locking wall. Blocked at 15.

``Effects of the invention'' As mentioned above, the present invention extends a locking wall that comes into contact with the other support wall on the support wall at the tip of the guide groove, and the load in the direction of the gap is applied to the elongated rod element. The rod element will not come off from the guide groove even if it is blocked by the locking wall.
It fulfills its function as a television antenna.
Moreover, since the locking wall is provided only on the leading end side of the gap, the weight does not increase, the cost does not increase, and there is no problem in terms of design.

[Brief explanation of drawings]

Figures 1 to 6 show a specific embodiment of the present invention.
The figure is a plan view showing the overall outline, and the second figure is the first one.
Figure 3 is a rear view of Figure 1, Figure 4 is a sectional view taken in the direction of the arrow in Figure 1, Figure 5 is a view taken in the direction of the V arrow in Figure 1, and Figure 6 is an enlarged view of the main parts. Exploded perspective view, 7th to 12th
The figures show a conventional example, Fig. 7 is a plan view showing the overall outline, Fig. 8 is a side view of Fig. 7, Fig. 9 is a rear view of Fig. 7, and Fig. 10 is a plan view of Fig. 7. 11 is a sectional view taken along the X arrow, FIG. 11 is a view taken along the XI arrow in FIG. 7, and FIG. 12 is an exploded enlarged perspective view of the main parts. 1...Antenna housing, 4...One base surface, 5...
...Other base surface, 6, 7... Support wall, 8... Guide groove, 9... Rod element, 15... Locking wall.

Claims (1)

[Scope of utility model registration request] The antenna housing is formed by bringing the openings into contact with each other, and support walls each having a tip bent toward the other side are extended from one base surface and the other base surface of the antenna housing, and a support wall is provided between the tips of the two support walls. In a television antenna in which a guide groove is formed with a gap, a rod element is accommodated in the guide groove, and the base end of the rod element is screwed, the support wall on the tip side of the guide groove is connected to the other support wall. A television antenna characterized in that a locking wall is provided to prevent the rod element from coming off the guide groove even if a load is applied to the rod element extending in the direction of the gap.