JPH0132408Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a loop antenna for receiving UHF broadcasting.

In conventional loop antennas of this type, both ends of the loop antenna element are inserted into the cylindrical part of the support metal fitting, and the caulked parts of both ends are elastically inserted into the notches formed at the ends of the cylindrical part. Since the loop antenna element is supported in a tree-like manner by being engaged with each other, when an external force is applied to the loop antenna element, an extremely large force is applied to the caulked part and the notch part, making it easy for these parts to become disengaged. Moreover, since the supporting metal fittings are exposed to the outside, the appearance of the loop antenna is poor, making it undesirable for this type of loop antenna.

Therefore, the present invention is an attempt to eliminate the above-mentioned drawbacks, and it is possible to firmly maintain the established state of the loop antenna element, hide the supporting metal part and make the appearance beautiful, and also make it possible to tilt or remove the loop antenna element. In addition, the loop antenna element 20, which is weak when stored in a cardboard box, can be easily connected to the base body 2 and the bulge 4.
The present invention aims to provide a loop antenna that is protected by the following.

The structure is such that the base is provided with a pair of support fittings facing each other, the two bases of the loop antenna element are attached to the support fittings, and the loop antenna element is erected relative to the base. In the loop antenna, the support fitting can be connected to a conducting wire for deriving a television signal, and the base has a hollow base body and a rear part of the upper surface of the base body that protrudes upward. The planar shape of the base main body is larger than the outer circumferential shape of the loop antenna element, and the two supports formed of a conductive material are provided in a hollow space inside the base main body. Metal fittings are arranged, and these supporting metal fittings are each provided with a bearing hole and are provided at a position below the above-mentioned bulging part, and the bulging part is positioned so as to cover above the above-mentioned supporting fitting. In addition, in the above-mentioned bulge, two long longitudinal grooves are arranged in parallel in the front-rear direction from the upper surface to the front surface of the bulge, and two lateral grooves long in the left-right direction are arranged in series on the upper surface of the bulge. The two horizontal grooves are continuous with the rear ends of the two vertical grooves, and the two base portions of the loop antenna element are connected to an upright piece extending in the direction of tree growth. It is composed of a pivot piece formed by bending symmetrically from the upper piece to the distance direction of both base parts,
The distance between the bases of the two pivot pieces is set to such a size that the bases of the pivot pieces elastically abut against the edge of the support hole when the two pivot pieces are respectively inserted into the support hole; On the other hand, the positional relationship between the support hole of the support fitting and the horizontal groove of the bulge is such that the upper part of the upright piece can pass through the horizontal groove while the root of the pivot piece is in contact with the edge of the support hole. The length of the horizontal groove is set to a length that allows the bent pivot piece to pass through when inserted and removed from the support hole, and the length of the vertical groove is Using the pivot piece as a fulcrum, the loop antenna element that had been established above the bulge was moved forward and made longer so that it could face the top surface of the base at a position lower than the top surface of the bulge. The positional relationship between the groove and the horizontal groove is such that the upper part of the upright piece engages with the side edge of the horizontal groove while the base of the pivot piece is in contact with the edge of the support hole, but the vertical groove and the horizontal groove are continuous. The two were placed in a position where they did not face each other.

The drawings showing the embodiments of the present application will be described below. Reference numeral 1 denotes a base molded from a synthetic resin material, which includes a base main body 2 with only the bottom open, a lid plate 3 attached to the bottom of the base main body 2,
The base body 2 includes a bulge portion 4 formed by protruding a portion of the upper wall of the base body 2 upward.
In the base body 2, reference numeral 5 denotes a conductor insertion groove formed in the rear wall, into which a conductor 6 for leading out a television signal is inserted, as shown in FIG. Reference numeral 7 indicates a cover plate mounting support, 8 indicates a cover plate receiving piece, 9 indicates a mounting surface, and 10 indicates a hollow chamber. Next, in the bulging portion 4, 11 is a hollow chamber, which is continuous with the hollow chamber 10 of the base main body 2. Reference numeral 12 denotes two horizontal grooves formed in the upper wall 4a, which are long in the left-right direction and formed on the same straight line. The length of this horizontal groove 12 is the third
As shown in FIGS. 4 and 4, the length is set to be sufficient to allow the pivot piece of the loop antenna element, which will be described later, to be inserted into and removed from the support hole of the support fitting. 13 is the upper wall 4
There are two longitudinal grooves formed on the front wall 4a and the front wall 4b, which are long in the front-rear direction. The rear end of this vertical groove 13 is continuous with the longitudinally intermediate portion of the lateral groove 12 . As shown in FIG. 5, the length of this vertical groove 13 is set to be sufficient to allow a loop antenna element, which will be described later, to be rotated upward and forward using the pivot piece as a fulcrum. Reference numeral 14 denotes a groove wall established downward from the groove edges of the horizontal groove 12 and the vertical groove 13, which guides the rising piece of the loop antenna element to be described later, and also serves as a guide for the bulging portion 4.
It functions to shield most of the inside of the hollow chamber 11 from being seen from the outside. This groove wall 14 is the fourth
As shown in the figure, it is not formed at one end of the lateral groove 12 on the side wall 4c side. Reference numeral 15 designates mounting pedestals that protrude downward from the upper wall 4a on the side wall 4c side of the end of the lateral groove 12, and are formed in pairs on the left and on the right. The top surface of the mounting base 15 has a concave groove 15a for inserting the pivot piece, and a fitting convex portion 15b for fixing the support fitting.
and mounting screw holes (numerals omitted) are formed respectively. Next, 16 is a mounting screw 1 attached to the mounting base 15.
7, and is formed by a base plate 18 and a support piece 19 raised from the base plate 18. This support fitting 16 is made of a conductive material. The board 18 has a fitting hole 1
8a is formed, and this fitting hole 18a is fitted into the fitting convex portion 15b. In addition, the support piece 19
A support hole 19a is formed in the support hole 19a. The side surface of the support piece 19 on the lateral groove 12 side is located within the lateral groove 12 when viewed in plan, as shown in FIGS. 3 and 4. The conducting wire 6 is connected to the mounting screw 17.

Next, reference numeral 20 denotes a loop antenna element attached to the support fitting 16, and the base portions 20a at both ends are made up of two parallel rising pieces 21 extending in the direction of tree establishment, as shown in FIG. From both base parts 20a
The pivot piece 2 is bent symmetrically in the far and near directions.
It is composed of 2. The intervals between these pivot pieces 22 are such that the base portions of the pivot pieces 22 (or the upright pieces 2
1) is set to a size such that it comes into contact with the edge of the support hole 19a due to the elasticity of the loop antenna element 20. As shown in FIG. 4, the loop antenna element 20 is pivoted by having the upright piece 21 inserted penetratingly into the horizontal groove 12, and the pivot piece 22 fitting into the support hole 19a and groove 15a of the support fitting 16. The root portion of the piece 22 is pressed against the edge of the support hole 19a. In the above state, the upper part of the upright piece 21 engages with the side edge of the lateral groove 12 and is locked in the upright state in the support hole 1.
The positional relationship between 9a and the lateral groove 12 is set.

In the case of the above configuration, when receiving television waves, the loop antenna element 20 is rotated upward about the pivot piece 22 as shown by the solid line in the drawing to be in the established state. In this state, the upright pieces 21 move away from each other in the horizontal groove 12 due to the restoring force of the loop antenna element 20, and the root of the pivot piece 22 comes into contact with the edge of the support hole 19a, and the upright pieces 21 The rotation of the loop antenna element 20 is caused by the movement of
It is engaged and locked with the groove edge of No. 2. Therefore, the loop antenna element 20 is reliably maintained in the established state. In addition, the signal received by the loop antenna element 20 can be reliably sent to the support fitting 16 from the abutting portion between the root portion of the pivot piece 22 and the edge of the support hole 19a.

Next, when it is desired to transport the loop antenna, the upright pieces 21 of the loop antenna element 20 are moved in a direction toward each other against elasticity, and the vertical groove 1 is moved.
3, and in this state, tilt the loop antenna element 20 forward and insert the rising piece 21 into the vertical groove 1.
3 and positioned along the upper surface of the base body 2 as shown by imaginary lines in FIGS. 1 and 5. Therefore, the overall volume of the loop antenna can be reduced, and a large number of loop antennas can be packed in a narrow space.

Next, when it is desired to remove the loop antenna element 20 from the base 1, the loop antenna element 20 is established while the base 1 remains as it is, and at this position, the upright pieces 21 are largely moved in the direction toward each other and pivoted. Pull out the support piece 22 from the support hole 19a,
Thereafter, the loop antenna element 20 can be removed by pulling out the base 20a from the horizontal groove 12, and if the loop antenna element 20 is to be attached to the base 1, it can be easily attached by reversing the procedure described above. can.

In the above embodiment, the pivot pieces are urged in directions away from each other and brought into contact with the support pieces, but in the present application, the pivot pieces are urged in directions approaching each other and brought into contact with the support pieces. They may be brought into contact with each other, and in that case, the supporting metal fittings are arranged on the other end side of the lateral groove.

As described above, in the present invention, when it is desired to receive television waves, the loop antenna element 20 can be maintained in the established state relative to the base 1, so that the practical effect of receiving television waves well is achieved. be.

Also, when receiving TV signals as described above,
The lower pivot piece 22 of the base portion 20a of the loop antenna element 20 engages with the support hole 19a of the support fitting 16, and the upper portion of the rising piece 21 of the base portion 20a engages with the side edge of the lateral groove 12 of the bulging portion 4. Since it is adapted to engage with the support hole 19a and the side edge of the lateral groove 12, the distance between the support hole 19a and the side edge of the lateral groove 12 can be increased, and the loop antenna element 20 can be firmly maintained in the erected state.
This has the effect that even if an external force is applied to the loop antenna element 20, the loop antenna element 20 can be firmly supported in a tree shape with respect to the base 1.

Further, in the state where the loop antenna element 20 is established as described above, the loop antenna element 2
Both pivot pieces 22 of 0 are connected to the support hole 19a of the support fitting 16.
The loop antenna element 20 and the support fitting 1 are inserted into the support hole 19a, and the root portion of the pivot piece 22 comes into elastic contact with the edge of the support hole 19a.
This has the effect of making it possible to improve the electrical connection between the parts 6 and 6, and to better send out the reception signal of the television wave toward the conducting wire 6 connected to the support metal fitting 16.

Furthermore, even if the loop antenna element 20 is configured to be erected on the base 1 as described above, when transporting the loop antenna, the vertical groove 13 of the bulge 4 can be used to secure the loop. The antenna element 20 can be tilted forward using the support hole 19a as a fulcrum, and as a result, the entire loop antenna can be folded into a small size, which has the effect of reducing transportation costs due to the reduction in bulk. Moreover, when the loop antenna is stored in a cardboard box during transportation, the loop antenna element 2 is weak.
0 is now protected by the base body 2 and the bulge 4. That is, in the folded state, the loop antenna element 20 is smaller than the planar shape of the base body 2 as shown in FIG. It also has the advantage of being protected against loads such as This means that the weak loop antenna element 2
It is possible to save the protective material used in special packaging for protecting the 0, and there is also an excellent practical effect in preventing the bulk of the luggage carrier from increasing.

Further, even though it has various effects as described above, since the bulging portion 4 is positioned so as to cover the upper part of the support fitting 16, the support fitting 16 and the pivot piece 22 of the loop antenna element 20 are This has the practical effect of making the overall appearance of the loop antenna beautiful.

Furthermore, as described above, the loop antenna element 20
Even if the pivot piece 22 of the loop antenna element 20 is covered by the bulge 4, the horizontal groove 12 can be used to cover the loop antenna element 20.
By moving the pivot pieces 22 closer to or away from each other, the pivot pieces 22 can be pulled out from the support hole 19a of the support fitting 16, and furthermore, the pivot pieces 22 can be removed from the lateral groove 12, so that, for example, when the loop antenna element 20 If the loop antenna element 20 becomes deformed or dirty, it can be removed from the base 1, repaired or cleaned, and then reattached to the base 1, which has a practical effect.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a perspective view of a loop antenna, FIG. 2 is a perspective view of the loop antenna showing the base as an imaginary line, and FIG. 3 is a cross section showing the vicinity of the bulge. 4 is a cross-sectional view taken along the - line, FIG. 5 is a cross-sectional view taken along the - line, and FIG. 6 is a bottom view of the loop antenna. DESCRIPTION OF SYMBOLS 1...Base, 2...Base main body, 4...Bulging part, 6...Conducting wire, 11...Hollow chamber, 12...Horizontal groove, 13...Vertical groove, 16...Supporting metal fitting, 19a...
...Support hole, 20...Loop antenna element, 20a
... Base part, 21 ... Upright piece, 22 ... Pivot piece.

Claims (1)

[Scope of utility model registration request] The base is provided with a pair of supporting metal fittings facing each other, and the two base parts of the loop antenna element are respectively attached to the supporting metal fittings so that the loop antenna element is erected with respect to the base. In a loop antenna to which a conducting wire for deriving a television signal can be connected, the base is formed by a hollow base body and a rear part of the upper surface of the base body that protrudes upward. The planar shape of the base body is larger than the outer peripheral shape of the loop antenna element, and the two supporting metal fittings made of a conductive material are disposed in the hollow space inside the base body. Each of these support fittings is provided with a bearing hole, which is located below the bulge, and the bulge is positioned so as to cover the upper part of the support fitting, and the bulge is located below the bulge. In the part, two long vertical grooves are provided in parallel in the front-rear direction from the top surface to the front surface of the bulging part, and two lateral grooves long in the left-right direction are provided in series on the top surface of the bulging part, and These two
The horizontal grooves of the strips are continuous with the rear ends of the two longitudinal grooves, and the two base portions of the loop antenna element each have a raised piece extending in the direction of tree formation, and distances from the raised piece to both base portions. The spacing between the bases of the two pivot pieces is determined by the distance between the two pivot pieces when they are inserted into the respective support holes. The base of the pivot piece is sized to elastically abut against the edge of the support hole, while the positional relationship between the support hole of the support fitting and the horizontal groove of the bulge is such that the base of the pivot piece is in contact with the edge of the support hole. The upper part of the rising piece is configured so that it can pass through the horizontal groove when it is in contact with the part,
The length of the horizontal groove is set to a length that allows the bent pivot piece to pass through when inserted and removed from the support hole, and the length of the vertical groove is set to allow the pivot piece to pass through when the bent pivot piece is inserted and removed from the support hole. As a fulcrum, the loop antenna element that had been established above the bulge was moved forward and set longer so that it could face the top surface of the base at a position lower than the top surface of the bulge. The positional relationship is such that the base of the pivot piece is in contact with the edge of the support hole, and the upper part of the upright piece engages with the side edge of the horizontal groove, but does not face the continuous part of the vertical groove and the horizontal groove. A loop antenna characterized by the following.