JPH0632181A - Telescopic pole mechanism - Google Patents

Abstract

PURPOSE:To prevent the breakage of a pole when mischief is applied to it or it touches an obstruction, by composing it so as to be contracted through pressing a switch with a bending load applied to the extended pole. CONSTITUTION:When a pole 10 touches an obstacle or is subjected to mischief by a child, etc., the pole 10 receives a bending load in the lateral direction. At that time, the base end 10a of the pole 10 presses a proximity switch 30 and operates to break a circuit, and a motor for driving the pole 10 is reversed, consequently contracting the pole 10. When the switch 30, being in a condition in which a contact piece is contacted always, is pressed by the pole base end 10a, the contact piece is parted, breaking the circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corner pole attached to an automobile or a pole which automatically expands and contracts such as a radio antenna. More specifically, when the expandable pole comes into contact with an obstacle or the like, it automatically The present invention relates to a telescopic pole mechanism designed to be reduced.

[0002]

2. Description of the Related Art A multi-stage telescopic pole formed by inserting and inserting a plurality of cylinders is used as a corner pole, an antenna, etc. for automobiles, and it automatically expands and contracts by the forward and reverse movements of a motor. ing.

For example, as shown in FIG. 4, the corner pole is fed out or wound up by rotating the rotary drum R forward and backward by the motor M of the drive cord 60 inserted and locked inside the pole 10. Thus, the pole 10 is designed to expand and contract,
In particular, this can be done by operating a switch from inside the vehicle.

The applicant of the present application has a mechanism in which, when the pole 10 which is still in the extended state is directly pushed down or pulled up by hand, the pole 10 is automatically reduced and stored. Already developed by.

[0005]

However, practical problems still remain in the above-mentioned conventional telescopic pole mechanism, and it is necessary to further enhance the function.

[0006] For example, when it is necessary to reduce the lengthened pole when getting off the vehicle, it is troublesome to get on and operate the switch again. In that respect, it is extremely difficult to provide the above-mentioned conventional function. Although convenient, there was still a problem in preventing damage to the pole.

[0007] In other words, the extended pole is liable to be mischievous or deformed or damaged by contact with an obstacle. At this time, it is customary to receive a bending load from the lateral direction.

However, the above-mentioned conventional function cannot protect this, and there is a risk that the pole will bend at that time.

On the other hand, with the development of manufacturing technology, it has been expected that a more convenient telescopic pole with more enhanced functions will appear.

The present invention has been made in view of the above circumstances, and when the pole is mischievous or comes into contact with an obstacle, the pole is protected by quickly detecting and reducing it. Is.

[0011]

SUMMARY OF THE INVENTION The present invention is a telescopic pole mechanism for expanding and contracting a telescopic pole by using power, and is pressed by a base end portion of the pole into a storage tube in which the pole is stored. A telescopic pole mechanism is provided, in which an extended pole is contracted by pressing the switch when the extended pole receives a bending load. The above-mentioned problems are achieved.

The present invention also achieves the above object by adding the above-mentioned mechanism to a telescopic pole mechanism in which an extended pole is pushed, pulled up, or twisted to be contracted.

[0013]

In the telescopic pole mechanism according to the present invention, when the pole which automatically expands and contracts by remote control from the inside of the vehicle is in the extended state, it is contracted by directly applying an external force to the pole. .

In other words, when the pole comes into contact with an obstacle or is mischievous by an infant or the like, a bending load is applied from the lateral direction. This reduces because the motor that presses and acts to break the circuit and thus drives the pole is reversed.

In the switch, when the contact is always in contact with the contact and is pressed by the base end of the pole, the switch separates from the switch and cuts off the circuit.

On the other hand, inside the tip of the pole, there is arranged a switch which separates when pressed from above, which also cuts off the circuit and reduces the pole.

Besides, it is also possible to reduce the pole by pulling up or twisting the pole.

[0018]

Embodiments of the telescopic pole mechanism according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view showing the internal mechanism of the telescopic pole mechanism according to the present invention, FIG. 2 is a sectional view taken along the line XX 'in FIG. 1, and FIG. 3 is a circuit diagram for controlling the telescopic movement of the pole. is there.

The feature of the telescopic pole mechanism according to the present invention is that in the telescopic pole mechanism for extending and contracting the telescopic pole 10 by using power, the pole 10 is accommodated in the storage pipe 20 in which the pole 10 is stored. A switch 30 that works by being pressed by the base end portion 10a of the is arranged, and the extended pole 10 receives a bending load and presses the switch 30, so that the pole 10 is contracted. Where it is.

Although the present invention can be applied to a vehicle corner pole, an antenna, etc., the vehicle corner pole will be described below.

The pole 10 includes a plurality of metal tubes 11a,
Is a multi-stage bar-shaped body in which 11b, 11c, ...
It can be expanded and contracted.

A cylindrical spring 13 formed by exposing a notch piece 17 on the side surface is fitted to the lower part of the maximum diameter tube of the telescopic pole 10, that is, the lowermost metal tube 11c.
And below that, there is an annular pressing ring 1 made of an insulator.
5 is fitted.

By the way, the pole 10 is freely movably moved up and down in a state where the cutout piece 17 of the cylindrical spring 13 is in sliding contact with the cylindrical storage tube 20 made of a conductor, and the storage tube 20 is provided.
Is fixed to the bumper r via a nut 71 and a reinforcing member 73 made of an insulating material such as synthetic resin.

A switch 30 which is pressed by the pressing ring 15 arranged at the base end portion 10a of the pole 10 is arranged in the storage tube 20.

That is, when the pole 10 is in the extended state, holes are made at three positions of the storage pipe 20 in which the pressing ring 15 is located, and the pins 35 and 3 to be inserted therein are provided.
A flexible switching base 31 having a substantially C shape is provided around 5, 35.

The tip of the pin 35 is in contact with the pressing ring 15, and the tapered base end is fitted in the tapered recessed groove 32 formed in the switching base 31.

The switching base 31 is held by the tightening spring 33, and the opening 3
1a is a contact 37 that is normally in contact with and can be separated
a and 37b are fixedly attached, and the contactor 37a is the storage tube 2
A ground wire 39 which is in contact with 0 and is grounded to the vehicle body is connected to the contact 37b.

The switch 30 constructed as described above is used.
Is covered and protected by an upper lid 38a made of an insulating material such as a synthetic resin and an auxiliary spacer 38b.

On the other hand, a light-transmissive lens 40 having a light emitting body 41 therein is fitted in a minimum diameter tube of the pole 10, that is, the metal tube 11a located at the uppermost stage, through a contact ring 42 so as to be vertically movable. One terminal 41a of the light emitter 41 is connected to the contact ring 42, and the other terminal 41b is connected to the conductive plate 43 fixed to the lower end of the lens 40.

An insulating cylinder 51 is fitted below the lens 40 with a predetermined space, and a conductor cylinder 52 that contacts the conductive plate 43 is provided inside the insulating cylinder 51. A cylinder 53 is slidably fitted and a compression spring 54 is installed below the cylinder 53 to urge the cylinders 52, 53 upward.

Further, a central shaft 56 of a conductor having an insulating coating 55 is inserted through the cylinders 52, 53 and the compression spring 54, and the tip end thereof comes into contact with the cylinder 52. .

The center shaft 56 holds the lower end of the compression spring 54 and a cylinder 57 fitted below the cylinder 51.

A drive cord 60 having an insulating coating on a core wire 61 is attached to the central shaft 56, and power is supplied to the light emitter 41 through the drive cord 60. .

By the way, the expansion and contraction of the pole 10 is performed by rotating the motor M shown in FIG. 3 or FIG. Of course, the motor M is designed to rotate in the forward and reverse directions.
a, 37b (SW1 shown in FIG. 3), or even if the circuit is interrupted by the cylinder 52 and the conductive plate 43 (SW2 shown in FIG. 3), the motor M rotates in the reverse direction, that is, the drive cord 60 is driven in the winding direction. Controlled by.

When the vehicle is run with the pole 10 extended, the pole 10 does not shrink even if it is subjected to wind pressure or vibrations. If an external pressure above a certain level does not act, the contacts 37a, 37b and the conductive plate 43 and the cylinder 52 are adjusted so as not to separate from each other.

Next, the usage of the telescopic pole mechanism according to the present invention will be described in detail with reference to FIGS.

For example, when an infant or the like grabs the extended pole 10 and shakes it to the left or right, the pole 30 is immediately contracted by the switch 30.

In other words, when the pole 10 is swayed left and right,
This is slightly inclined so that the pressing ring 15 presses at least one pin 35, and the pressed pin 35 expands the opening portion 31a of the switching base 31.

Therefore, the contacts 37a, 37b in contact with each other at the open portion 31a, that is, SW1 shown in FIG. 3 separates from each other to break the circuit, so that the relay D is deactivated and the contact d. Is opened, and the relay B is deactivated to switch the contact b, so that the motor M is rotated in the reverse direction to reduce the pole 10.

When the pole 10 is completely reduced, it becomes 3
The rotation of the motor M is stopped by the point switch E.

On the other hand, when the pole 10 is pressed from above, the conductive plate 43 and the cylinder 53 which are normally in contact with each other, that is, SW2 shown in FIG. The pole 10 will be reduced.

By the way, when the pole 10 in the contracted state is extended, if the switch A arranged in the vehicle is turned on, the relay B operates and the contact b is switched, so that the motor M rotates in the normal direction. Then, the pole 10 is extended.

Needless to say, when the switch A is turned off, the relays B and D become inoperative and the size is reduced as described above.

The telescopic pole mechanism of the present invention is not limited to the above construction, but may have the following construction.

For example, it is preferable to dispose the pins 35 in three directions, but the number is not limited and may be more or less.

Further, the switch 30 is not limited to the above structure, and various switch mechanisms can be adopted.

For example, it is possible to attach a resistance line strain gauge, so-called strain gauge, to an arbitrary portion of the pole 10 and electrically control the pole 10 so as to be reduced according to the detected value.

On the other hand, in the above structure, the lens 40 is further added.
Is urged downward by a compression spring whose elastic force is weaker than that of the compression spring 54 so that the conductive plate 43 contacts the cylinder 52 in the normal state and the lens 40 can be moved slightly upward from the normal state. According to this structure, the circuit is cut off even when the pole 10 is pulled up, and the pole 10 can be reduced.

In addition, an insulating film is applied to a part of the cylinder 53 or the conductive plate 43, and the parts which are not insulative film are joined to each other in the normal state, and when the pole 10 is twisted, the parts which are insulative film are brought into contact with each other. It is also possible to break the circuit.

In the present invention, the tip of the pin 35,
Also, the recessed groove 32 into which this is fitted has an opening 31a when only the pin 35 facing the opening 31a is pressed.
Although it is preferable to form the taper shape as described above so that the pin can be opened, a semicircular pin pin 35 may be positioned in the tapered depression groove 32.

[0052]

Since the telescopic pole mechanism according to the present invention is constructed as described above, it has the following effects.

(1) The telescopic pole mechanism according to the present invention is
When the pole in the stretched state receives a bending load, it immediately shrinks, so it can be mischievous or
Alternatively, when it comes into contact with an obstacle, the pole is not damaged, and the life of the product is dramatically improved, which is an excellent effect.

(2) Further, since it can be reduced by intentionally applying an external force from the lateral direction to the pole, it is troublesome as compared with the case where the pole is reduced only by remote operation from the inside of the vehicle. It has an excellent effect that it is possible to solve the problem.

(3) In addition, the function of reducing the pole by pushing it in from above, pulling it up, or twisting it, and the function of reducing it when a bending load is applied to the pole in the lateral direction are provided. By enhancing the product, the excellent effect that the durability, reliability, and convenience of the product are significantly improved is achieved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an internal mechanism of a telescopic pole mechanism according to the present invention.

FIG. 2 is a sectional view taken along line XX ′ in FIG.

FIG. 3 is a circuit diagram for controlling expansion and contraction of the pole.

FIG. 4 is an exploded view showing a corner pole.

[Explanation of symbols]

 M motor 10 pole 10a base end 20 storage tube 30 switch 31 switching base 32 recessed groove 33 tightening spring 35 pin 40 lens 41 light emitter 43 conductive plate

[Procedure amendment]

[Submission date] July 14, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

Claims (2)

[Claims] 1. An expansion / contraction pole mechanism for expanding / contracting an expandable / contractible pole by using a power, wherein a switch actuated by being pressed by a base end portion of the pole is arranged in a storage tube in which the pole is stored, A telescopic pole mechanism, wherein the extended pole receives a bending load and presses the switch to reduce the pole. 2. An expansion / contraction pole mechanism in which an expanded pole is pushed, pulled up, or twisted to be contracted, wherein the expansion / contraction pole is contracted by receiving a bending load. The telescopic pole mechanism according to claim 1.