JPH0641366Y2 - Electric antenna controller - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) [0001] The present invention relates to an electric antenna control device applied to a selective four-wheel drive vehicle in which two-wheel drive and four-wheel drive can be switched at any time for traveling. It is a thing.

(Prior Art) There are four-wheel drive vehicles that constantly supply engine output to the front and rear wheels, and two-wheel drive vehicles that always drive with two-wheel drive, such as when driving on rough roads or off-road. There is a selective four-wheel drive vehicle that has a structure that switches to four-wheel drive when driving force is required. On the other hand, a car is equipped with an antenna for radio reception. FIG. 4 shows the state, in which 1 is a four-wheel drive vehicle and 2 is an antenna attached to the front part of the vehicle body. When the antenna 2 is attached at this position, there is a telescopic mechanism for holding the antenna 2 by hand, but there is also an electric type in which the antenna 2 is telescopically extended.

With reference to FIG. 3, a conventional electric-type antenna control circuit will be described. Reference numeral 3 denotes a motor, which drives the antenna 2 to expand and contract. The motor 3 is connected to the battery 10 via the current breaker 4 and the contacts 6 to 9 of the relay circuit 5. 11, 12 are coils of the relay circuit 5, 13 is an up-down changeover switch, which has a movable contact 14 connected to the positive side of the battery 10, a fixed contact 15 for up, and a fixed contact 16 for down. is there. Switch the up / down selector switch 13 to the motor 3
By changing the direction of the current supplied to the antenna 2, the antenna 2 can be expanded and contracted.

In the electric antenna control device having the above configuration, the antenna 2
The expansion / contraction drive of is performed as follows. In order to extend the antenna 2 assuming that it is retracted, the movable contact 14 of the up / down changeover switch 13 is brought into contact with the fixed contact 15 for up. Then, the current from the battery 10 flows through the coil 11 to excite it. The contacts 7 and 8 are closed by this excitation, so that the current from the battery 10 flows in the order of the contact 8, the current breaker 4, the motor 3, and the contact 7 in order.
Will return to. If it is set in advance that the antenna 2 will extend when a current flows in the motor 3 in this direction, the antenna 2 will extend at this time. When the movable contact 14 of the up / down changeover switch 13 is brought into contact with the fixed contact 16 for down, the coil 12 of the relay circuit 5 is excited at this time, so that a reverse current flows through the motor 3. The antenna 2 will be retracted.

The movable contact 14 of the up / down changeover switch 13 is closed while a button (not shown) is being pressed, so that the motor 3 continues to be energized. As an example of this improvement, there is also a timer which uses a timer and continues energization even when the finger is released from the button for a certain period of time after the button is pressed. When current flows through the motor 3 in this way,
When the antenna 2 extends to the final position and hits the stopper to stop, the current value flowing through the motor 3 becomes larger than before. The current breaker 4 detects the current and cuts off the current of the circuit.

(Problems to be solved by the invention) Some four-wheel drive vehicles that perform off-road traveling and the like also use the electric antenna having the above structure, and operate the up / down changeover switch 13 not only when the vehicle is stopped but also when the vehicle is traveling. It will be. This operation is frequently performed depending on the condition of the passage to be traveled so that the antenna 2 does not come into contact with trees or the like while traveling, but it is necessary to extend the antenna 2 while traveling on a forest road or the like. The antenna 2 may be damaged by forgetting or not performing the operation without noticing it. Although there is a technique described in Japanese Utility Model Publication No. 61-33687 as a technique for retracting the antenna when the vehicle is stopped, it does not match the problem to be solved by the present invention. The present invention has been made for the purpose of solving this problem, which prevents the antenna from being damaged during traveling as described above.

(Means for Solving the Problems) As a means for solving the above problems, the present invention has switched from two-wheel drive to four-wheel drive in a selective four-wheel drive vehicle 1 equipped with an electric antenna 2. A transfer switch 17 for switching the electric circuit is provided at a time, and this transfer switch 17 is replaced by this transfer switch.
When the antenna 17 is turned on, the antenna 2 is connected to the storage side circuit of the antenna 2 through a timer relay 21 that keeps the antenna 2 in the on state for a period of time until the antenna 2 is completely retracted and stored.

(Operation) With such a configuration, the antenna 2 is automatically retracted when the two-wheel drive is switched to the four-wheel drive. Therefore, generally, the antenna 2 is always driven during the four-wheel drive in which a damage accident of the antenna 2 is likely to occur. Is being withdrawn. When returning from four-wheel drive to two-wheel drive, the antenna 2 returns to the extended state. In this case, when the transfer switch 17 is turned on, the transfer switch 17 receives the antenna 2 through the timer relay 21 that keeps the antenna 2 in the ON state until the antenna 2 is completely retracted and stored. Since it is connected to the circuit, the motor 3 operates until the antenna 2 is completely retracted and housed, and the antenna 2 does not stop in the middle of housing.

(Embodiment) An embodiment of the present invention will be described below with reference to FIG. 1 by giving the same reference numerals to the same members as those in FIG. 3, and in this circuit, two-wheel drive (2H) to four-wheel drive will be described. Drive (4H or 4
A transfer switch 17 for switching the electric path when it is switched to L) is provided, and the transfer switch 17 is a coil that forms a circuit on the storage side of the antenna 2 via a timer relay 21 including a time-measuring mechanism 18, a coil 19 and a contact 20. It is connected to 12. The circuit of the timer relay 21 is
Energize for the time required from the state where the antenna 2 is most extended to the point where it is completely retracted. Due to this energization, when the drive mechanism is switched from the two-wheel drive to the four-wheel drive, a current for rotating the motor 3 in the direction of retracting the antenna 2 flows.

FIG. 2 is a time chart explaining the operation of the circuit of FIG. In this figure, the up / down selector switch
The movable contact 14 of 13 shows a state where it contacts the fixed contact 15 for up, and shows the state where it contacts the fixed contact 16 for down. Alternatively, the transfer switch 17 is turned on, and the timer relay 21 is turned on. And shows the electric conduction state of the motor 3 in both the forward and reverse directions. In the figure, the portion indicated by t is the time from the actual movement of the motor 3 until the antenna 2 is completely retracted and stored until the motor 3 stops. Therefore, the ON time of the timer relay 21 needs to be set to a time exceeding this time t.

(Effects of the Invention) Since the present invention is the electric antenna control device configured as described above, it is generally hard from the time of two-wheel drive in general running, and the antenna is likely to be damaged by coming into contact with trees or the like. It is possible to automatically retract the antenna and store it in the vehicle body when switching during four-wheel drive. And since the transfer switch is connected to the storage side circuit of the antenna via the timer relay that keeps the ON state until the antenna is completely retracted and stored, the motor will not operate until the antenna is completely retracted and stored. It works and the antenna does not stop during storage.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram of a conventional example, FIG. 3 is a circuit diagram of a conventional example, and FIG. 4 is a perspective view of an automobile to which the present invention is applied. 1 …… four-wheel-drive vehicle 2 …… antenna 3 …… motor 5 …… relay circuit 10 …… battery 11,12 …… coil 13 …… up / down changeover switch 17 …… transfer switch 21 …… timer relay

Claims (1)

[Scope of utility model registration request] 1. In a selective four-wheel drive vehicle equipped with an electric antenna, a transfer switch is provided for switching an electric path when switching from two-wheel drive to four-wheel drive, and the transfer switch is provided as a transfer switch. An electric antenna control device, characterized in that, when turned on, the antenna is connected to a storage side circuit of the antenna through a timer relay that secures an on state until the antenna is completely retracted and stored.