JPH0532267B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to devices that automatically expand and contract by remote control from inside the vehicle, such as corner poles and receiving antenna poles that display the vehicle width of a vehicle. This invention relates to a drive device for a telescopic pole for a vehicle.

[Prior Art] Conventionally, in this type of device, a drive cord is passed through a retractable pole constructed by sequentially fitting a plurality of metal pipes with different diameters in multiple layers, and a winding drum for the drive cord is used. The present inventor has developed a device in which a retractable pole is extended and contracted by driving it with a reversible motor and letting out or winding up a drive cord.
No. 62-48678 and Utility Application No. 62-48679 have already been filed.

This type of device has the convenience of being able to expand and contract telescopic poles such as corner poles by remote control from inside the car, but it is necessary to keep pressing the indoor switch until the telescopic poles are fully extended or retracted. As such, complete automation has not yet been reached.

[Object of the invention] The object of the present invention is to achieve the following by using a relatively simple mechanism.
When the telescoping pole completes its extension or shortening operation,
To provide a completely automated driving device for a telescopic pole for a vehicle that can automatically stop a driving motor.

[Summary of the invention] The gist of the present invention for achieving the above object is as follows:
A built-in switch is provided around the shaft of the winding drum around which the drive cord for expanding and contracting the telescopic pole is wound, and which opens and closes the electrical circuit by the rotation of a switching armature, and the center drives the winding drum via a clutch mechanism. A driving device for a telescopic pole for a vehicle, characterized in that a gear is provided with a switching means for rotating the switching armature by idle rotation when the winding drum stops.

[Embodiments of the Invention] The present invention will be described in detail based on illustrated embodiments.

FIG. 1 is a sectional view of an embodiment in which the present invention is applied to a corner pole for indicating the vehicle width of an automobile, and the telescopic pole portion is shown separated from the drive section. FIG. 2 is a side view of the telescopic pole in a slightly extended state with the cover removed. In these drawings, reference numeral 1 indicates an extendable pole constructed by sequentially fitting a plurality of metal pipes with different diameters in multiple layers, and reference numeral 2 indicates a drive unit for performing the extendable and retractable operations. Inside the cover 3 of the drive unit 2, a hollow shaft portion 6 integral with the winding drum 5 is fitted around the center shaft 4, and a center gear 7 is rotatably fitted to the hollow shaft portion 6. . The winding drum 5 is a telescopic pole 1
The winding drum 5 has an annular cord winding groove 9 for winding and accommodating a synthetic resin drive cord 8 for pushing up or pulling in the winding drum 5.
As shown in FIGS. 4A and 4B, a suitable number of clutch receiving holes 10, for example three, are provided, preferably at locations far from the center, at substantially equal intervals and at equal angles from the center. A clutch spring 11 and a clutch boss 1 are provided in these clutch housing holes 10, respectively.
2 are fitted, and the tip of each clutch boss 12 is pressed against the opposing surface of the center gear 7. As shown in FIG. 5, a plurality of recesses 13 corresponding to the clutch housing holes 10 are formed on the facing surface of the center gear 7, and the tip of each clutch boss 12 is normally fitted into these recesses 13. It is pressed together. The center gear 7 is driven by a DC motor 14 in both forward and reverse directions via a reduction mechanism.
As shown in FIG. 2, a worm wheel 16 is engaged with a worm 15 fixed to the shaft of an electric motor 14,
Small diameter gear 1 integrated with worm wheel 16
7 is meshed with the center gear 7.

At the end of the drive cord 8, a cord stopper 18 made of conductive metal is provided for securing the drive cord 8 in the cord winding groove 9, as shown in FIG.
are combined. Further, a wire 20 made of conductive metal is inserted as a core material inside the drive cord 8 to energize the indicator lamp 19 attached to the tip of the telescopic pole 1, and the end of this wire 20 is connected to the cord stopper. It is electrically connected to 18.

Further, a concave contact piece 21 is laid in a part of the cord winding groove 9 of the winding drum 5, as shown in FIG. The wire 20 is always connected to the contact piece 21. In addition,
Each metal pipe of the telescopic pole 1 is used for the electrical path on the negative side of the indicator lamp 19, and a lead wire (not shown) connected to the negative side of the power source is drawn out from the base of the telescopic pole 1. Further, as shown in FIG. 2, the base of the telescopic pole 1 is fitted into the cord outlet section 22 and fixed by a connecting tube 23. The drive cord 8 passes from the winding drum 5 through the cord outlet portion 22 to the inside of the telescopic pole 1, and its tip is connected to the most extreme pipe of the telescopic pole 1. In FIG. 1, reference numeral 24 indicates a waterproof rubber ring for attaching the telescopic pole 1 to the automobile chassis 25, 26 indicates a stop ring for the center gear 7, 27 indicates a shaft stopper screw, and 28 indicates a nut.

In the above configuration, when the electric motor 14 is rotated in the forward direction, the center gear 7 is rotated in the forward direction via the reduction mechanism consisting of the worm 15, the worm wheel 16, and the small diameter gear 17, and the clutch boss that is pressed into the recess 13 of the center gear 7 is rotated in the forward direction. The rotational torque is transmitted to the winding drum 5 via the winding drum 12, and the winding drum 5 is driven in the forward direction. Due to this rotational force of the winding drum 5 in the positive direction, the drive cord 8 housed in the cord winding groove 9 is let out, and the telescopic pole 1 begins to extend. When the drive cord 8 has finished feeding out and the telescopic pole 1 is fully extended,
The rotation of the winding drum 5 is stopped by a cord stopper 18, and the center gear 7 relative to the winding drum 5 is stopped.
relative rotation begins. That is, when the winding drum 5 stops rotating, the clutch boss 12 is pushed in by the rotational force of the center gear 7, and the clutch spring 1
Since the center gear 7 is pulled into the clutch housing hole 10 against the elastic force of the clutch 1, the center gear 7 can continue to idle as it is. At that time, the tip of the clutch boss 12 escapes from the recess 13 and the sliding surface A between the recesses 13
It slides on the surface A, falls into the next recess 13, and then rides on the next sliding surface A. During this operation, a built-in switch, which will be described later, is closed by the switching boss 7a provided on the center gear 7. The indicator lamp 19 lights up, and then the electric motor 14 automatically stops as described later.

Also, in order to reduce the size of the telescopic pole 1, the electric motor 1
4 rotates in the reverse direction, the center gear 7 rotates in the reverse direction, the clutch boss 12 pressed by the clutch spring 11 fits into the recess 13, and the winding drum 5 also rotates in the reverse direction. When the winding drum 5 starts rotating in the reverse direction, the drive cord 8 that has been fed out is wound up and the telescopic pole 1 begins to contract. And telescopic pole 1
When the winding drum 5 has finished shrinking, the winding drum 5 is stopped by the cord stopper 18. In this case as well, the clutch boss 12 is pushed into the clutch accommodation hole 10 by the rotational force of the center gear 7 against the elasticity of the clutch spring 11.
The motor will continue to idle until it stops, and immediately after the start of idle rotation, the switching boss 7a opens the built-in switch, so the indicator lamp 19 goes out and the electric motor 14 also automatically stops.

Next, the built-in switch and its associated electrical circuit will be described with reference to FIGS. 8-12. As shown in FIG. 1, a fixed contact piece 31 equipped with a connecting plate 30 connected to an external power source is attached to the inner center of the cover 3, and this fixed contact piece 31 extends to the above-mentioned contact piece 21. A built-in switch is installed in the middle of the electrical circuit. This built-in switch is built around the hollow shaft 6, as illustrated in FIG. 9, and can be installed in a conventional winding drum drive mechanism with almost no changes.

As an example, a corrugated washer 32 made of a conductive material is slidably connected to the fixed contact piece 31, and an appropriate number of electrically conductive rivets 33 penetrating the bottom wall of the winding drum 5 are electrically connected to the corrugated washer 32. has been done. The top surfaces 33a of these electrically conductive rivets 33 are exposed on the inner surface of a switch case 34 made of an insulator fitted around the hollow shaft portion 6. A switching armature 36 and a corrugated washer 37, each made of a conductive metal material, are interposed between the switch case 34 and a switch cap 35 made of an electrically conductive material. The switching armature 36 has a first
As shown in Figure 1, the top surface 33a of the electrically conductive rivet 33
A contact portion 36a that comes into contact with is protruded, and a switching protrusion 38 is provided that protrudes toward the center gear 7 side. In the embodiment, this switching protrusion 3
8 shows an example in which a rod portion 38b of a convex member consisting of a base portion 38a and a rod portion 38b is passed through a hole in the switching armature 36, and the base portion 38a is fixed to the switching armature 36 by a method such as spot welding. In order to prevent contact between the contact portion 36a and the electroconductive rivet 33, the thickness of the base portion 38a is set to be the same as that of the contact portion 3.
It is necessary to make it the same as the protrusion height h of 6a, or to make it slightly smaller. Further, in the illustrated example, three contact portions 36a are provided on the same circle, but this is for balancing one of the contact portions 36a and is not actually used.

The corrugated washer 37 is provided with a through hole 37a through which the switching projection 38 passes, and the top surface of the switch cap 35 is provided with an arcuate hole 35a for allowing the switching projection 38 to rotate. The switching protrusion 38 projects toward the center gear 7 through the arcuate hole 35a. The center gear 7 has a switching armature 36 in contact with this switching protrusion 38.
Two switching bosses 7a are provided for rotating the switching protrusion 38.
When it is rotated to the position indicated by the dotted line in the figure, the contact portion 36a of the switching armature 36 connects to the electrically conductive rivet 33.
The built-in switch is turned on by contacting the top surface 33a of the switch. Conversely, when the switching protrusion 38 is pushed by another switching boss 7a and returned to the position indicated by the solid line, the contact portion 36a and the electrically conductive rivet 33 come out of contact and are turned off.

On the other hand, inside the winding drum 5, as shown in FIG. It is fixed in place. The corrugated washer 32 is provided with a tapered boss 32a to ensure contact with the electrostatic rivet 33.
It fits into a recessed hole 33b provided in the electrostatic rivet 33. Note that the electrically conductive rivet 33 has its top surface 33a
is firmly held on the switch case 34 side so that it does not protrude toward the switching armature 36 side.

Figure 12 shows the entire electrical circuit, SW1 is an indoor switch for indoor operation, R is a relay,
A is the drive device shown in FIG. 1, B is a battery, and switch SW2 is the built-in switch illustrated in FIGS. 8 to 10 described above. Further, motor M indicates the electric motor 14 in FIG. 1, and D2 indicates a light emitting diode corresponding to the indicator lamp 19 in FIG.

A relay coil L for switching the relay contact S is matched to the limiting resistance of the light emitting diode D2, and a protection diode D1 is connected in parallel to the relay coil L in order to maintain the reverse withstand voltage of the light emitting diode D2. This protection diode D1 becomes a current relay by connecting the relay coil L and the light emitting diode D2 in series.

Normally, indoor switch SW1 is on the down side, relay contact S contacts contact B,
Built-in switch SW2 is off, so no current is flowing from battery B. Therefore, when indoor switch SW1 is set to the UP side as shown, contacts P1 and P2 are connected, so battery B
In Figure 12, the current from B→P1→P2→
The flow is M→S→b→earth, the motor M rotates forward, and the telescopic pole 1 shown in FIG. 1 begins to extend. When the telescopic pole 1 is fully extended, the built-in switch SW2 closes as described above, and at the same time the light emitting diode D2
lights up.

Here, the current from battery B is B→P1→L
→ SW2 → D2 → flow to ground, relay R is turned on immediately, and relay contact S changes from contact b to contact a.
can be switched to Therefore, this time the current changes from P1 to P
Since both ends of the motor M are short-circuited due to the circuit flowing in the order of 2→M→S→a→P1, the motor M immediately stops, but the light emitting diode D2 continues to light up.

Next, when indoor switch SW1 is switched to the down side, the current changes from B→P1→a→S→M→P2→P3→
Since the current flows from b to ground, the motor M begins to rotate in the opposite direction and the telescopic pole 1 begins to contract. When this reduction operation is completed, the built-in switch SW
2 opens, the light emitting diode D2 goes out, the relay R turns off, and the relay contact S switches to the contact b. And both ends of motor M are P2→M→S
→b→P3→P2 is short-circuited, so
Motor M stops automatically.

To summarize the above operation, when extending the telescopic pole 1, it is sufficient to simply turn the indoor switch SW1 to the up side. Then, the motor M rotates in the forward direction to raise the telescopic pole 1, and when the telescopic pole 1 is fully extended, the built-in switch SW2 is turned on to light up the light emitting diode D2, and then the motor M is stopped. Moreover, when retracting, it is only necessary to turn the indoor switch SW1 to the down side, and the motor M rotates in the opposite direction to retract the telescopic pole 1. When the retractable pole 1 is completely retracted, the built-in switch SW2 is turned off and the light emitting diode D2 is turned off. The light goes out, then the motor M stops and everything returns to its original state.

The built-in switch shown in the example is designed to be incorporated directly into a conventional drive device of this type, and has the same external shape as a conventional semi-automatic type, is not large in size, and is inexpensive. It has the advantage of not being very expensive. Furthermore, since it is a rotary slide type, the contact surface can be cleaned every time the switch is switched, and it is also easy to make the switch completely waterproof by making it a sealed type.

In addition, the electric circuit shown in Fig. 12 is said to be able to use only one circuit each for the indoor switch SW1 and the relay circuit R, to be able to stop the motor M immediately, to be safe because it is equipped with a protection circuit, or to be used as a retractable pole. It has many advantages, such as no problem with operation even if the switch is turned off while 1 remains elevated. However, the built-in switch SW2 and the electric circuit are merely examples, and it goes without saying that various changes can be made in addition to the embodiments. That is, the built-in switch SW12 may be configured to be switched using the relative rotation of the center gear 7 with respect to the winding drum 55, and the clutch mechanism is not limited to that shown in the drawings.

[Effects of the Invention] As explained above, the drive device for a telescopic pole for a vehicle according to the present invention includes a winding drum for a drive cord that extends and contracts the telescopic pole, and a center gear that drives the winding drum via a clutch mechanism. Since it has a built-in switch that automatically opens and closes using the relative rotation of the pole, it has the effect of completely automating the drive of the telescopic pole. Further, since the built-in switch can be incorporated into a conventional drive device of this type with almost no modification, even if it is fully automated, it does not become bulky and is economical in cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the driving device for a telescopic pole for vehicles according to the present invention, and FIG. 1 is a sectional view thereof, FIG. 2 is a left side view with the cover removed, and FIG.
Fig. 3 is a sectional view of the winding drum, Fig. 4 is a right side view thereof, Fig. 5 is a side view of the center gear, Fig. 6 is a sectional view of the cord stopper, and Fig. 7 is a cross-sectional view of the winding drum and the cord stopper. 8 is an exploded perspective view of the built-in switch, FIG. 9 is an enlarged sectional view of the assembled state, FIG. 10 is an explanatory diagram of the function of the built-in switch, FIG. 11 is a sectional view of the switching armature, and
The figure is an electrical circuit diagram. 1 is a telescopic pole, 2 is a drive unit, 3 is a cover, 4 is a center shaft, 5 is a winding drum, 6 is a hollow shaft part, 7 is a center gear, 7a is a switching boss, 8 is a drive cord, 9 is a cord Winding groove, 10 is a clutch housing hole, 11 is a clutch spring, 12 is a clutch boss, 14 is a DC motor, 15 is a worm, 16 is a worm wheel, 17 is a small diameter gear, 18 is a cord stopper, 19 is an indicator lamp, 20 is a wire ,
21 is a contact piece, 30 is a power supply plate, 31 is a fixed contact piece, 32, 37 are corrugated washers, 33 is a power supply rivet, 34 is a switch case, 35 is a switch cap, 35a is an arcuate hole, 36 is a switching armature, 36a 38 is a contact portion, 38 is a switching protrusion, 39 is a conductive plate, SW1 is an indoor switch, SW2 is a built-in switch, and D2 is a light emitting diode.

Claims (1)

[Claims] 1. A built-in switch that opens and closes an electric circuit by rotation of a switching armature is provided around the shaft of the winding drum in which the drive cord for expanding and contracting the telescopic pole is wound, and the winding drum is driven via a clutch mechanism. A driving device for a telescopic pole for a vehicle, characterized in that a center gear is provided with a switching means for rotating the switching armature by idle rotation when the winding drum is stopped.