JP3022521U - Bendable antenna mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] In a mechanism having a foldable base in a retractable antenna element such as a vehicle-mounted communication antenna, the tilted state of the antenna is properly locked to eliminate play in the upright state of the antenna. (EN) Provided is a retractable antenna element that appropriately prevents noise generation during communication due to play. [Structure] A base metal fitting and a foldable joint fitting attached to the base end of the radiating element, and a radiating element side foldable fitting 6 and a base fitting mounted inside the foldable joint fitting. Is formed by a base-side foldable metal fitting 3 which is attached to the radiating-element-side foldable metal fitting and is flexibly connected to the radiating-element-side foldable fitting, and an elastic member 7 is interposed between the radiating-element-side foldable fitting and the foldable joint fitting , Form a threaded part on the folding joint fitting to the base fitting.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to the invention of a foldable antenna element, and in a foldable antenna element used for an on-vehicle communication antenna, etc., regarding a mechanism having a foldable base part, properly locks the folded state of the antenna, and It aims to eliminate backlash in the upright state of the antenna and appropriately prevent noise during communication due to backlash.

[0002]

[Prior art]

 In recent years, the demand for higher gains of antennas has increased, and antennas have a tendency to become longer. Therefore, it is also strongly required to make such an antenna retractable. That is, as such a retractable antenna, an antenna element that can be tilted in the front-rear direction of the vehicle and a spring that holds the antenna element upright as in Japanese Utility Model Laid-Open No. 63-91991, are urged at all times. A mechanism consisting of a sleeve that puts the element upright is proposed.

In Japanese Utility Model Laid-Open No. Sho 58-64111, an antenna element that can be tilted in the front-rear direction of the vehicle and a bendable portion of the antenna element that is held upright and biased by a spring are installed. The one consisting of the main body has been announced.

[0004]

[Problems to be solved by the device]

 Although the above-mentioned conventional techniques have their respective merits, they still have the relevant problems. That is, since the above-mentioned Japanese Utility Model Laid-Open No. 63-91991 is merely held by the sleeve when it is used in the upright state, it is apt to rattle, so that it can be reliably used as an antenna under running vibration conditions. This disturbs continuous conduction, and the cause of noise generation during communication remains. Also, when this antenna is used in a tilted state, it is highly likely that it will be restored to the upright state due to vibration, etc., because it is always subjected to a tensile force by the spring.

Also, in the above-mentioned Japanese Utility Model Laid-Open No. 58-64111, basically, the holding of the upright state or the biasing by the spring is adopted, and therefore the one of the Japanese Utility Model Laid-Open No. 63-91991 described above is used. It has the same problems as above, and cannot always be regarded as preferable.

[0006] Therefore, the conventional retractable antenna element as described above has a merit that the antenna can be tilted and driven for a vehicle, for example, when entering a garage or passing through a guard type, but when the vehicle vibrates greatly. In addition, there is a disadvantage that the antenna is locked due to the pulling force by the spring and the locked antenna is released and the antenna falls back to the upright position, failing to achieve its purpose. In addition, such a foldable antenna has a certain amount of play in the upright state even if a spring is used, and there is a disadvantage in that noise cannot be avoided during communication due to such play. .

[0007]

[Means for Solving the Problems]

 The present invention has been studied to solve the problems in the prior art as described above, and has succeeded in appropriately eliminating the disadvantages in the laid state and the upright state by appropriately adopting the screwing structure. And as follows:

(1) An antenna mechanism having a bendable portion formed on a base end side of a mounting base, wherein the bendable portion is attached to the base metal part and the base end portion of the radiating element. The foldable joint metal fitting, the radiant element side foldable metal fitting installed inside the foldable joint metal fitting, and the base foldable metal fitting attached to the base metal fitting and flexibly connected to the radiant element foldable metal fitting. A bendable antenna characterized in that an elastic member is interposed between the radiating element-side collapsible metal fitting and the collapsible joint metal fitting, and a screw portion for the base metal fitting is formed on the collapsible joint metal fitting. mechanism.

(2) An elastic member is interposed between the collar portion formed on the radiating element side collapsible metal fitting and the collapsible joint metal fitting, and the radiating element side collapsible metal fitting and the collapsible joint metal fitting are connected. The bendable antenna mechanism according to the above item (1), characterized in that a thread for engaging with each other is provided between them.

(3) An elastic member is interposed between a seat portion formed on the radiating element-side collapsible metal fitting and a radiating element mounting metal fitting mounted on the tip of the collapsible joint metal fitting. The bendable antenna mechanism according to item (1).

(4) In any one of the above items (1) to (3), the radiating element side collapsible metal member and the base side collapsible metal member are flexibly connected by a spring pin. The described bendable antenna mechanism.

[0012]

[Embodiment of device]

 A specific embodiment of the present invention as described above will be described with reference to the accompanying drawings. One specific example of the present invention mounted on a vehicle body 30 is as shown in FIG. The bendable antenna mechanism itself is as shown in FIG. 2, and a radiating element 10 as a collapsible antenna element having a top 11 attached to its top end is mounted on a vehicle body 20 via a holder 8, a joint metal fitting 5, etc. Is attached to.

To mount the radiating element 10 on the holder 8 as described above, the base end of the radiating element 10 is inserted into the mounting hole 18 formed in the holder 8 and tightened with the stator 9 screwed into the screw hole 19. As shown in FIGS. 3 and 4, the upper end of the joint fitting 5 is screwed into the female screw hole 17 at the lower end of the holder 8. Further, the joint metal fitting 5 is formed with a rotation operation portion 14 for preventing slippage on its outer surface as shown in FIG. 5, but the joint metal fitting 5 can be mounted on the radiating element side as shown in FIGS. The upper end portions of the tilting metal member 6 and the base-side collapsible metal member 3 are internally provided, and the locking portion 26 formed on the upper end of the radiating element-side collapsible metal member 6 and the locking portion 25 formed on the inner surface of the joint metal fitting 5 are connected. A spring 7 is interposed between them.

The lower half of the base-side collapsible metal fitting 3 is formed in a large diameter so as to be joined to the lower end of the joint tool 5, and the lower half is externally rotatably operated. The engaging protrusion 33 is provided, and the female thread 3a is formed inside the engaging protrusion 33 as shown in FIG. 5 relating to the second configuration example, and is connected to the base 20 as shown in FIG. It engages with a male screw shaft 21 protruding above the base plug 1 having a female screw hole 22 formed in the lower portion. An angle adjusting nut 2 is interposed between the base-side retractable metal fitting 3 and the base plug 1 and is screwed together with the base-retractable metal fitting 3 into the male screw shaft 21 as a double nut. When mounting the product of the present invention on 30, the directions of the vehicle body 30 and the spring pin 4 are appropriately selected, and the tilting direction is determined so that the antenna element is laid down within the width of the vehicle body 30.

As shown in FIGS. 3 and 4, the male screw 16 is formed at the intermediate portion of the radiating element-side collapsible metal fitting 6 assembled in the central portion of the joint metal fitting 5 as shown in FIG. On the other hand, a female thread 15b as shown in FIG. 4 is formed on the inner surface of the locking portion 25 on the base end side of the joint fitting 5, and is formed in the middle portion of the base side retractable fitting 3. A female screw thread 15a is formed on the inner surface of the joint fitting 5 on the base end side with respect to the formed male screw thread 13 so as to be engaged with the male screw thread 13 in a standing state as shown in FIG.

That is, in the standing state as shown in FIG. 3, the male thread 13 is screwed into the female thread 15a, so that the backlash of the tiltable antenna in the upright state can be effectively prevented. When the radiating element 10 is laid down by releasing the engagement of the threads 13 and 15a from the upright state as shown in FIG. 3, the male thread 16 can be screwed to the female thread 15b. By doing so, the restoring force of the spring 7 is controlled to prevent the retractable antenna that is erected by the spring force from standing up due to the impact in the laid state.

In FIGS. 5 and 6 described above, the spring 7 is interposed between the radiating element-side collapsible metal fitting 6 and the holder 8. A seat 12 is provided so as to accurately receive the acting force of the ring 7. Further, the male screw thread 13 formed on the base side retractable metal fitting 3 is screwed to the female screw thread 15 of the joint metal fitting 5 as in the case of FIGS. The male screw 16 as shown in FIGS. 3 and 4 is not formed in the middle of the side folding metal fitting 6, so that the base folding metal fitting 3 has a female thread 16 as shown in FIGS. The screw threads 15a and 15b are not provided in steps, and only one female screw thread 15 is formed, and the other structures are the same as those in FIGS.

That is, in the above-mentioned FIGS. 3 and 4, the spring 7 constantly applies a pulling force to the base-side inclinable metal member 3 via the radiating element-side inclinable metal member 6, whereas the spring 7 in FIG. Nos. 5 and 6 are configured such that the pressing force by the spring 7 acts on the retractable metal fitting 6 and the spring pin 4 portion. Therefore, in the case of FIGS. 4 and 6 in which the retractable metal fitting 6 is laid down with the spring pin 4 as the center, in the state of FIG. 4, a large pressing force is stored in the spring 7, whereas in the state of FIG. The pressing force of the spring 7 is hardly stored.

That is, in the state shown in FIG. 4, since the male thread 16 of the retractable metal fitting 6 is screwed into the female thread 15b of the joint metal fitting 5, the joint metal fitting 5 can be attached even if vibration or impact force occurs. The tip fitting 6 or the holder 8 or the radiating element 10 does not stand upright. On the other hand, in the state shown in FIG. It does not stand up under vibration or shock when the vehicle is running.

In the present invention as described above, in the bending mechanism formed on the base end side of the antenna mechanism that is mounted on the mounting base, the bending section is formed on the base metal member and the radiation element. A foldable joint fitting attached to an end, a radiant element-side foldable fitting inside the foldable joint fitting, and a base attached to the base fitting and flexibly connected to the radiant element-side foldable fitting It is formed by the side-foldable metal fittings, and the elastic member is interposed between the radiation element-side collapsible metal fittings and the collapsible joint metal fittings. To form a mechanism without play.

By forming a screwing portion for the base metal fitting on the collapsible joint metal fitting, the antenna element in the upright state is held in a proper and play-free setting state.

An elastic member is interposed between the collar portion formed on the radiant element side collapsible metal fitting and the collapsible joint metal fitting, and the radiation element side collapsible metal fitting and the collapsible joint metal fitting are mutually interposed. By providing the engaging screw, the radiating element side inclinable member has an effective uprighting action based on the joint metal fitting in the standing state, and in the laid state, the radiating element side flexible metal fitting is It is effectively engaged with the joint fitting and is prevented from standing up due to vibration or impact of the elastic member under the elastic action condition.

Since the elastic member is interposed between the receiving portion formed on the radiant element side collapsible metal fitting and the radiating element mounting metal fitting mounted on the tip of the collapsible joint metal fitting, the elastic member is always provided. The pressing force is applied, and a large pressing force is transmitted to the radiating element side inclinable metal fittings and the base side flexible metal fitting in the upright state of the antenna element to form a stable upright state. By fully stretching and forming a state in which the pressing force is poor, restoration to the upright state under vibration or impact conditions is achieved.

Since the radiating element-side collapsible metal fitting and the base-side collapsible metal fitting are flexibly connected by the spring pin, it is preferable in the antenna element installed on the vehicle body by flexibly connecting both the tiltable metal fittings. Form a lodge.

[0025]

[Effect of device]

 According to the present invention as described above, in the retractable antenna element used for this type of vehicle communication antenna, etc., the element is locked in the laid state and the upright state, for example, the antenna obstructs traveling. When the vehicle enters the garage by lying down, the slight ruggedness at the entrance of the garage eliminates the collapse of the bend and the antenna becomes upright, causing the antenna to break or bend, or the upright state with high gain. Even if the conditions are established, it is possible to effectively eliminate the disadvantages such as the inability to perform preferable transmission and reception due to the noise generated due to the rattling when the vehicle is running.

[Brief description of drawings]

FIG. 1 is a side view showing a general configuration of a flexible antenna element of the present invention mounted on a vehicle.

FIG. 2 is a side view of an antenna element according to the present invention.

FIG. 3 is a sectional view in an upright state showing one configuration of a flexible portion according to the present invention.

FIG. 4 is a cross-sectional view showing a bent state of the one shown in FIG.

FIG. 5 is a sectional view in an upright state showing another configuration according to the present invention.

6 is a cross-sectional view showing a bent state of the one shown in FIG.

[Explanation of symbols]

 1 base plug 2 angle adjusting nut 3 base side flexible metal fitting 4 spring pin 5 joint metal fitting 6 radiating element side flexible metal fitting 7 spring 8 holder 9 stator 10 radiating element 11 top 12 seat portion (Figs. 5 and 6) 13 male Screw 14 Rotating operation part 15 Female screw (Figs. 5 and 6) 15a Female screw (Figs. 3 and 4) 15b Female screw (Figs. 3 and 4) 16 Male screw (Figs. 3 and 4 only) 17 Female Screw hole 18 Mounting hole 19 Screw hole 20 Mounting base 21 Male screw shaft 22 Female screw hole 25 Locking part (joint metal fitting) 26 Locking part (radiant element side collapsible metal fitting) 30 Vehicle body 33 Engagement part

Claims (4)

[Scope of utility model registration request] 1. A bendable portion formed on a base end side of an antenna mechanism adapted to be mounted on a mounting base, wherein the bendable portion is attached to a base metal part and a base end portion of a radiating element. And a radiating element-side foldable metal fitting mounted inside the joint metal fitting and the foldable joint metal fitting and the base foldable metal fitting attached to the base metal fitting and flexibly connected to the radiating element-side foldable metal fitting, A bendable antenna mechanism, characterized in that an elastic member is interposed between the radiating element-side foldable metal fitting and the foldable joint metal fitting, and the foldable joint metal fitting is formed with a screw portion for the base metal fitting. 2. An elastic member is interposed between a collar portion formed on the radiating element side collapsible metal fitting and the collapsible joint metal fitting, and between the radiating element side collapsible metal fitting and the collapsible joint metal fitting. A screw thread provided to be engaged with each other is provided.
The bendable antenna mechanism described in. 3. An elastic member is interposed between a seat portion formed on the radiating element side collapsible metal fitting and a radiating element mounting metal fitting mounted on the tip of the collapsible joint metal fitting. The bendable antenna mechanism according to Item 1. 4. The bendable type according to claim 1, wherein the radiating element side foldable metal fitting and the base side foldable metal fitting are flexibly connected by a spring pin. Antenna mechanism.