JPS6340890Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle antenna device, which is installed on a front pillar of a vehicle body, for example, so as to be able to rise and fall freely.

Conventionally, this type of vehicle antenna device includes a bamboo shoot-shaped rod antenna that is extendably provided on the front pillar of the vehicle body.

However, when the conventional vehicle antenna device described above receives radio waves with the antenna retracted inside the cavity of the front pillar of the vehicle body or along the outside of the pillar, the radio waves are transmitted by the metal outer peripheral wall of the front pillar. There is a risk that the antenna reception efficiency, that is, the antenna reception sensitivity will be reduced.

The present invention has been developed in view of the above-mentioned circumstances, and includes providing an antenna element in the vicinity of the upper end of the front pillar of the vehicle body, for example, so that the antenna element can be raised and lowered, and temporarily providing the antenna element with a click stop structure. In addition to improving the antenna reception efficiency by fixing it in a predetermined position, the structure is simplified, and assembly is facilitated to save labor through mass production.Furthermore, the shape is flat and thin, minimizing protruding parts. An object of the present invention is to provide a vehicle antenna device whose purpose is also to take safety measures during driving.

In particular, the present invention involves screwing an insulating base with an embedded earth plate into the pillar of the vehicle body through a cushion seat plate, and connecting the negative side braided wire of the power supply cable of the radio set through the earth plate and inside the pillar. Connect the positive core wire of the power supply cable to the lowest end of the fixing ring fitting whose lower part is buried in the upper part of the insulating base, and integrally mold the earth plate and fixing ring fitting with resin by crossing them in a detour. A pair of notched grooves are formed in the upper exposed part of this fixed ring fitting, and a positioning elastic body made of a single plate is elastically engaged with a locking part in both notched grooves. , a rotating base member that is integral with the antenna element is mounted on the fixed ring fitting and is rotatably fitted therein;
A plurality of engagement grooves provided on the rotating base member are selectively engaged with the locking portion to temporarily fix the antenna, and the antenna is configured to be freely raised and lowered at a predetermined angle as necessary. It is.

Hereinafter, the present invention will be described with reference to an illustrated embodiment.

In FIGS. 1 to 7, reference numeral 1 denotes a car body, and a front pillar 2 having a cylindrical cross section is provided between a roof 1a and a front 1b of the car body 1. This front pillar 2
An opening/closing door 3 is provided on the vehicle body adjacent to the vehicle body so as to be openable and closable. Further, in the vicinity of the upper end 2a of the front pillar 2, as shown in FIGS. 3 and 5, an insulating base 5 made of a synthetic resin material in which an earth plate 4 is embedded is connected to a cushion seat plate 6 made of rubber.
It is fixed to the vehicle body by a mounting screw member 7 via. The earth plate 4 has a pair of mounting ears 4b formed by integrally punching out the conductor 4a, and has a long hanging contact piece 4c bent downward in the middle of the conductor 4a and a slightly hanging contact piece 4c on both sides thereof. A reinforcing tongue piece 4d of the short insulating base 5 is provided, and the hanging contact 4c of the ground plate 4 is connected to the power supply cable 8 of the radio set (not shown) which is passed through the inside of the front pillar 2. The ground side braided wire 9 is connected by caulking.

On the other hand, a fixing ring fitting 10 is provided on the upper part of the insulating base 5 made of the synthetic resin material, and a collar part 1 is provided below the fixing ring fitting 10.
0a is integrally embedded and fixed in the insulating base 5, and the core wire of the power supply cable 8 is wound and connected to the lowermost end of the base 5. It is formed within the insulating base 5 in an isolated state. A pair of notch grooves 11, 11 are vertically formed in the ring portion 10b exposed above the fixed ring fitting 10, facing each other in the diametrical direction. In both notch grooves 11, 11, a positioning elastic body 12 formed by a ring-shaped leaf spring is attached to the ring portion 1.
It is elastically attached along the inner circumferential wall of 0b.
That is, when punching a metal plate material with a press, the positioning elastic body 12 is formed into a shape that roughly follows the inner periphery of the ring portion 10b, and is further formed approximately in the center so as to partially protrude outward. The locking portion 1 is also folded back at the free end along with the R-shaped locking portion 12a.
2b, 12b, and each notch groove 1
1 and 11 (see FIGS. 3 and 5).

On the other hand, the ring portion 10 of the fixed ring fitting 10
b On the outer periphery, there is a rotating base member 14 that is substantially integrated with a single antenna element 13 having a small diameter and elongated size.
is crowned and is rotatably fitted around a support shaft 15. Moreover, this rotating base member 14
The inner circumferential wall of the holder consists of four pairs arranged at equal intervals, and the positioning elastic body 12 is connected to the ring part 10b of the fixed ring fitting.
R-shaped engagement grooves 16a, 16b, 16c that engage with the R-shaped locking portion 12a protruding outward from the outer peripheral surface;
16d can be selectively engaged with the engaging portion 12a to temporarily fix the engaging portion 12a (see FIGS. 6 and 7). That is, the locking portion 12
a and each engagement groove 16a of the rotation base member 14,
16b, 16c, and 16d have the function of a click stop, and the rotating base member 14 can be moved around the support shaft 15 by a strong external force, for example, by the force of the operator intentionally. When the engaging groove 16b that is engaged with the engagement groove 12a is rotated to release the engagement groove 16b and switch to the engagement groove 16a, the R-shaped locking portion 12a engages with the engagement groove 16.
The ring portion 10 slides and rubs on the R-shaped surface of b.
This pressing force is gradually pushed to the outer peripheral surface of the locking portion 12a, which is formed integrally with the locking portion 12a.
Positioning elastic body 12 along the inner peripheral wall of the ring portion 10b
Due to this diameter expanding action, the elastic body 12 generates a strong frictional force against the inner circumferential wall, which acts as a resistance force that tries to push in the locking part 12a. Furthermore, by applying a stronger rotational force, in the extreme state, the folded locking part 12b of the free end of the elastic body 12 can be displaced within the range of the groove width of the notch groove 11 with which it is engaged. As a result, the expanded diameter state collapses, and the locking portion 12a is completely pushed into the outer peripheral surface of the ring portion 10b, and when the next engagement groove 16a is moved by rotation and the positions match, the locking portion 12a has positioning elasticity due to its own stored elasticity. The body 12 returns to its original state and the locking portion 12
a is adapted to engage with the engagement groove 16a, and this click stop function rotates the antenna element 13 from the position shown by the solid line in FIG. 4 to the position shown by the chain line, temporarily It is now fixed to

Therefore, when the antenna is not in use, it is laid down as shown by the solid line in FIG. Even if the antenna element 13 is laid down when the antenna is not in use, there is no risk of reducing the antenna reception efficiency because the radio waves are not shielded as in conventional pillar antennas of this type.

Furthermore, when the antenna is used, the above-mentioned click mechanism rotates the body into an upright position and temporarily fixes it, as shown by the chain line in FIG. 1, so that the antenna element 13 is also fully extended into the air. This enables good radio wave reception.

Furthermore, when the antenna element 13 receives a strong external force while in use (for example, when the element collides with an obstacle when parking the vehicle in a garage), the antenna element 13 is rotated by the rotation base 1 integral with the antenna element 13.
4 can be freely rotated about the support shaft 15, and as shown in FIG. 1, it is possible to lower the element 13 to a position approximately equal to the height of the roof 1a, so that there is no risk of the element 13 being broken.

Incidentally, the engagement groove 16c formed in the rotary base member 14 is connected to the front pillar 2 on the opposite side of the present invention.
This is to enable common installation in both locations.

In addition, four pairs of engagement grooves 16a, 16b, 16c, 16d are provided for the inclination angle of the element described above.
The reason for having a large number of engagement grooves is that the engagement grooves are selectively used to maintain a constant inclination angle of the element even when the inclination angle of the mounting pillars of various vehicle bodies differs. , which takes into consideration common usage for different vehicle types.

Furthermore, although a single antenna element is illustrated in this embodiment, the effects of the present invention will not be impaired in any way even if this antenna element is a multi-stage antenna element.

As described above, according to the present invention, the positioning elastic body 12 made of a ring-shaped leaf spring is elastically moved along the inner circumferential wall of the ring portion 10b exposed above the fixed ring fitting 10 embedded in the insulating base 5. The locking portions 12a, 1 are disposed in the
2b is engaged with each of the notched grooves 11, 11 provided in the ring portion, and protrudes from the notched groove 11 on the rotational friction inner circumferential surface of the rotating base member 14, which is rotatably fitted to the outer circumferential surface of the ring portion 10b. The engaging grooves 16a, 16b, 16c, 16 of the rotating base member 14 are pressed by pressing the locking portion 12a of the positioning elastic body 12.
d, and the conventionally commonly used click stop mechanism,
For example, a device that uses rotational force to change the engagement of meshing teeth against a spring force that presses in the direction of the rotation axis,
The temporary fixing force at the time of the click stop is weak, and the dimension in the direction of the rotation axis becomes large.
In addition, devices that have multiple balls and springs arranged around the axis to reduce the dimension in the direction of the rotation axis have problems such as having a large number of parts, resulting in a complicated structure and an expensive device. Although the structure is extremely simple, it is possible to temporarily fix it with a click stop, and it is not only cheap in terms of cost and saves labor through mass production, but also its shape. The antenna device can be made into a flat and thin shape with few protruding parts, which is preferable for safety reasons, and there is no risk of breakage even if the antenna device is subjected to impact from an external force, making it possible to receive good radio waves.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a part of a vehicle in which a vehicle antenna device according to the present invention is installed, Fig. 2 is an enlarged sectional view taken along the chain line A-A in Fig. 1, and Fig. 3 is a main feature of the present invention. FIG. 4 is a plan view of the present invention; FIG. 5 is a vertical sectional view of the main parts of the present invention; FIG. 6 is a cross-sectional view taken along the chain line B-B in FIG. 5; FIG. 7 is a perspective view of the rotating base member incorporated in the present invention. 1...Vehicle body, 2...Front pillar, 4...Earth plate, 5...Insulation base, 6...Cushion seat plate, 7...Mounting screw member, 8...Power supply cable, 10...Fixing ring metal fitting, 10a...flange part, 10b...ring part, 11...notch groove, 12
... Positioning elastic body, 12a, 12b ... Locking part, 13 ... Antenna element, 14 ... Rotating base member, 15 ... Support shaft, 16a, 16b, 1
6c, 16d...Engagement groove.

Claims (1)

[Scope of utility model registration request] An insulating base with an earth plate integrally embedded in the pillar of the vehicle body is fixed via a cushion seat plate, and the negative side of the power supply cable of the radio set that is passed through the pillar is connected to the earth plate. The positive side of the power supply cable is connected to a fixing ring fitting whose lower part is integrally buried in the upper part of the fixing ring fitting, and a pair of notched grooves are formed in the ring portion exposed to the outside of this fixing ring fitting. A positioning elastic body having a locking portion is elastically locked along the inner circumferential wall of the ring portion,
A rotating base member that is integrated with the antenna element is fitted onto the fixing ring fitting and is rotatably fitted, and a plurality of engagement grooves provided on the rotating base member are selected as the locking portion. 1. An antenna device for a vehicle, characterized in that the antenna element is movable up and down by being engaged with and temporarily fixed.