JP3314242B2 - Automatic antenna telescopic operation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic antenna expansion and contraction operation device, in which the up and down movement of an antenna is made to expand and contract by a clutchless system, and furthermore, a gear unit of a drive system is set to either a full expansion or contraction operation or an abnormal operation. It can be used to prevent the motor from burning, etc., and also to accurately prevent the occurrence of erroneous operations during repetition of ascending and descending. Control device.

[0002]

2. Description of the Related Art In a vehicle-mounted antenna, etc., it has been generally practiced to automatically expand and contract the antenna by driving a motor or the like. To release the motor driving force appropriately.
That is, a clutch is used on a rotating body such as a drum for winding a drum-type wire for performing an expansion and contraction operation of an antenna or a gear for driving a wire-feeding operation wire. ) Is applied to release the overload at the clutch section.

On the other hand, the present inventors have proposed a telescopic operation device which does not use a clutch for the telescopic operation of the automatic antenna as described above in Japanese Patent Application Laid-Open No. 1-279602. That is, a small gear that engages with a rotary gear that drives a drum or an antenna expansion / contraction operation wire is integrally formed on a worm wheel that is engaged with a worm driven by a motor, and an intermediate gear portion including a rotary gear having the small gear is formed. A limit switch operated by an elastic arm member is interposed in a power supply circuit for providing forward or reverse rotation to a motor for driving the worm, provided movably with respect to a support shaft together with a support frame having a switch operation unit. It has been proposed to operate an elastic arm member provided on a limit switch with the gear support frame.

[0004]

In the prior art described above, a considerable clutch force is required for the switching operation of the clutch mechanism, and the entire mechanism becomes large and strong, and is partially worn or deformed. Is likely to occur. Further, there are disadvantages such as generation of clutch noise and vibration due to operation under overload conditions.

The above-mentioned Japanese Patent Laid-Open Publication No. 1-2 proposed by the present inventors.
79602 eliminates the disadvantages of the above-mentioned conventional ones, and achieves the desired operation with a small operating force, and has little wear and loss, and does not generate clutch noise or vibration. Although it can be said to be an advantageous method, it has been found that there is still a disadvantage according to the result of repeated practical use and detailed examination of this method. That is, at the time of the switching operation by the elastic arm member, a reversing force equivalent to the switching operation force is stored in the elastic arm member,
When the power supply to the motor is turned off, conditions such as the reversing force of the elastic arm member, the elastic reaction force of the operation wire, and the play of the mechanism overlap to form a reversing operation force. The switch is turned on again. That is, a disadvantage in the mechanism that causes repeated ON / OFF operations was recognized.

[0006] This repetitive operation phenomenon can be easily expected to be eliminated by increasing the motor torque. However, when the motor torque is increased, the reversing operation force increases in proportion to the increase in the motor torque. It turned out that the advantage of the mechanism that was switchable by the acting force was only lost to some extent and was undesirable.
Again, it is difficult to properly eliminate the repetitive operation phenomenon described above.

[0007] Further, as for the changeover switch mechanism, any switch of the operation piece formed by the elastic arm member or the like needs to have a special switch configuration including the arrangement of the repetitively operating contact piece and the structure. It becomes complicated and inevitably expensive.

[0008]

SUMMARY OF THE INVENTION In view of the above situation, the present invention has been further studied and provided with an engaging / disengaging mechanism for restricting the operating torque of the operating means for operating the switch. The present invention has successfully solved the disadvantages of the prior art as described above, and is as follows.

(1) A rotating body such as a drum or a gear for expanding and contracting an antenna element via a wire or a rope is rotated via a worm wheel or a transmission gear engaged with a worm driven by a motor, and In a worm wheel provided with an intermediate gear unit integrally formed with the transmission gear or a small gear unit that engages with the rotating body, a switch operating unit that operates a limit switch provided in the motor drive circuit is provided. The gear unit support frame for the intermediate gear unit is provided with a lock elastic unit attached to the gear unit support frame, and the gear unit is provided between the lock elastic unit and the gear unit support frame. An automatic antenna expansion / contraction operation device, comprising an engagement / disengagement mechanism for regulating a movement torque of a body support frame.

(2) As a limit switch provided in the motor drive circuit, a switch having a mechanism that does not generate a substantial reaction force at the time of a switching operation is mounted, and the limit switch is provided on a gear body support frame having a switch operating portion for operating the switch. Attaching the intermediate gear portion so as to be movable and disposing an inversion auxiliary elastic material,
In addition, a lock elastic portion is attached to the gear portion support frame, and an engagement / disengagement mechanism for regulating the movement torque of the gear portion support frame is provided between the gear portion support frame and the lock elastic portion. The automatic antenna expansion and contraction operation device according to the above (1).

(3) A rotary switch is provided as a limit switch provided in the motor drive circuit, and a disk-shaped rotating member having a conductive region and an insulating region is used, and a conductive contact piece that slides on the rotating member is provided. A gear unit support frame movable by the intermediate gear unit, wherein one of the conductive contact pieces is disposed on the insulating region by the rotation of the rotary unit. A part of the circumference of the rotating part that is rotated in the manner described above is provided with an engaging and disengaging concave part that is engaged and disengaged via a locking elastic part so as to regulate the gear unit supporting frame moving torque. The automatic antenna telescopic operation device according to the above (1), which is characterized in that:

[0012]

A rotator such as a drum or a gear for extending and retracting an antenna element via a wire or a rope is rotated via a worm wheel or a transmission gear engaged with a worm driven by a motor, and is rotated by the worm wheel. In the one provided with an intermediate gear portion body integrally formed with the transmission gear or a small gear portion engaged with the rotating body,
A switch operating section for operating a switch provided in the motor drive circuit is provided on a gear body support frame for the intermediate gear body, so that when the drive system via the intermediate gear body is overloaded, it is supported. The switching operation of the switch is performed using the propulsive force generated in any of the axial directions.

A locking elastic member is attached to the gear member supporting frame, and a movement torque of the gear member supporting frame is regulated between the locking elastic member and the gear member supporting frame. Providing an appropriate moderation for the switch switching operation by providing the engagement / disengagement mechanism realizes an appropriate operation that does not fluctuate in the switching operation using the motor drive system as described above.

As a switch provided in the motor drive circuit, a limit switch having a mechanism that does not generate a substantial reaction force during a switching operation is mounted, and the intermediate portion is mounted on a gear body support frame having a switch operating portion for operating the limit switch. The gear body is mounted movably on the shaft and the reversing auxiliary elastic material is arranged,
In addition, a locking elastic member is attached to the gear member supporting frame, and an engaging / disengaging mechanism for regulating the movement torque of the gear member supporting frame is provided between the gear elastic member and the locking elastic member. Within the limits of the disengagement mechanism, the switches retain their respective states and move with a slight torque to the neutral point of the switches in relation to the reversing auxiliary elastics. The initial moving torque is large, the locking position is 0 torque, and at the time of reverse rotation, it returns with a small torque using the reaction force of the reversing auxiliary elastic material.

A gear body support frame having a switch operating section for switching a switch provided in the motor drive circuit is provided.
An elastic portion for locking is attached to the switching portion operated by the gear portion supporting frame, and the moving torque of the gear portion supporting frame is set between the locking elastic portion and the switching portion. The provision of the engaging and disengaging mechanism for regulation allows an appropriate action to be obtained with a simple configuration that does not require a reversing auxiliary elastic member, and an accurate operation with a simple and low-cost configuration.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, a specific embodiment of the present invention as described above will be described. The general structural relationship is as shown in FIG.
A rotary body 13 for extending and retracting an antenna element 15 such as a drum or a gear is provided via a transmission gear 12 at the bottom of the case 10, and a motor 18 is mounted on the upper part of the case 10. The worm 1 is provided on the motor shaft 11.

A worm wheel 2 is engaged with the worm 1, and a small gear 3 is formed integrally with the worm wheel 2 so that the gear unit 20 and the worm wheel 2 are engaged with each other as shown in FIGS. The gear portion 20 is slidably mounted on a support shaft 9 provided between the support portions 101, 101 formed in the case 10, and the gear portion body 20 has the gear portion support frame 4 and the An elastic portion for locking 5 attached to the support frame 4 in a state close to polymerization is disposed so as to enclose and is held together by the support shaft 9.

A reversal assisting elastic member 6 is provided between the gear portion supporting frame 4 and the locking elastic portion 5 between the shaft mounting portions of the supporting shaft 9 with respect to each other, as shown in FIG. In a neutral state, the elasticity (restoring force) of each reversing elastic member 6 is in a balanced state, and in one of the switching operation states as shown in FIG. 2 or FIG. 4, one of the reversing auxiliary elastic members 6 is sufficiently compressed. On the other hand, the other reversing assisting elastic member 6 is adapted to take an appropriately restored state.

A rolling element receiving portion 41 is formed on an outer surface of an intermediate portion of the gear portion body supporting frame 4 bent in a U-shape, while an inner surface of a middle portion of the locking elastic member 5 also bent in a U-shape. Is provided with an engagement recess 51 which engages with the rolling element 8 received by the rolling element receiving portion 41. Although a case where a sphere is adopted as the rolling element 8 is shown, a cylindrical part such as a roller may be used, or a projection 81 formed by projecting a circular projection as shown in FIG. Good. That is, even if there is no rolling of such a engaging portion 81, the same operation as that of the rolling element 8 can be obtained in the present invention by the hemispherical or semicylindrical engaging portion 81 in the present invention.

In the case of the embodiment shown in FIG. 1, the small gear 3 drives a rotating body 13 such as a drum or a take-up reel in a case 10 via a transmission gear 12. In this case, the gear unit 20 having the small gear 3 may directly drive the rotating body 13 such as a drum or a take-up reel, as shown in FIG.

A switch operation section 42 is provided opposite to the gear body support frame 4, and a limit switch in a control circuit as shown in FIG. 8 or FIG. 7 employs a switch 7 such as a slide switch which does not generate a reaction force, and the operation portion 71 of the switch 7 is positioned to perform a switching operation. The switch 7 is mounted on the mounting portion 102 in the case 10 or on the inner surface of the case 10 as shown in FIG. 1, and the switch operation portion 42 is formed to extend as appropriate. One member may have a hole for receiving the operation portion 71 of the switch 7.

The engaging recess 51 and the receiving portion 41 are not limited to the receiving portion 41 having the opening 43 as shown in the figure, but may be simply formed as a bowl-shaped recess. An appropriately modified one can be adopted.
In any case, either the receiving portion 41 or the engaging concave portion 51 is formed to be appropriately deep, and the receiving portion 41 or the engaging concave portion 51 is received up to or slightly beyond the center point or the axial portion of the sphere or the roller to relatively engage. The receiving depth of the concave portion 51 or the receiving portion 41 is shallower than that, and the holding effect is obtained at the deeper receiving depth. In the case of the engaging projection 81 fixed as shown in FIG. 6, it only slides and disengages.

According to the experiment, as shown in FIG. 5, when a spherical body having a diameter of about 4 mm is used as the rolling element 8 and the stroke at the time of the switching operation is set to 2.5 mm in both sides, the engaging recess is formed at the time of the switching operation. At 51, the rolling element 8 is held, the intermediate part of the elastic part 5 is curved as shown in FIG. 2 or FIG. 4, and the receiving part 41 is in an escaped state as shown by the imaginary line in FIG. In the stopped state, the lock elastic member 5 and the lock function of the switch itself are added, and the worm wheel 2
The locking holding force acts to perform the braking action. When the rolling element 8 moves easily and instantaneously from the stop position of the imaginary line in the drawing to the direction of dropping into the small acceptance portion 41 due to the restoring action of the reversing auxiliary elastic member 6 due to the reversing operation of the motor, the elasticity of the elastic member 5 causes The rolling element 8 is returned to the neutral position (shown by a solid line), that is, returns to the neutral point shown in FIG.

When the antenna element 15 is extended or retracted, the element 15 moves up and down with the set driving force due to the locking force crimped by the locking elastic member 5, and a load greater than the set driving force is generated. If the locking force is exceeded, the engaging recess 81 of the elastic member 5 is disengaged from the rolling element 8 and the support frame 4 moves in the driving direction to operate the slide switch 7.

In any case, according to the present invention, the rattling sound of the switch, which is recognized in Japanese Patent Application Laid-Open No. 1-279602, is not generated.
Since the material of the lock elastic member 5 can be metallized, it is stable against vibration, and the switch mounting, heat resistance creep resistance, dust resistance, etc. are sufficiently improved, and each design condition can be freely and accurately obtained. That has been confirmed.

The operation of the present invention as described above will be described. A worm 1 and a worm wheel 2 which are driven by a motor such as a rotating body such as a drum or a gear for moving a wire or a rope for expanding and contracting an antenna element. By rotating the worm wheel 2 with the intermediate gear unit 20 integrally formed with the small-diameter gear unit formed on the rotator, the driving force for performing the antenna expansion / contraction operation is reduced, and It is clear that the drive system can be simplified and made compact.

The above-mentioned intermediate gear unit 20 is provided so as to be slidable with respect to a support shaft together with a gear unit support frame 4 having a switch operation unit 42 and provided with a reversing elastic member 6. The gear body support frame 4 and the locking elastic member 5 are overlapped by holding the rolling member 8 so as to be able to roll freely, or by disposing the locking elastic member 5 for engaging with the engaging portion 81. It is as shown in the drawing that the setting can be made in a state and the portion is made compact.

By providing an engaging recess for engaging or disengaging the rolling element 8 or the engaging portion 81 in either the gear unit supporting frame 4 or the locking elastic member 5, a reversing elastic material is used at the time of reversing operation of the motor. The rolling element 8 or the engaging portion 81 is accurately fitted in the engagement concave portion by the reversing operation force, and the gear portion body supporting frame 4 is held at the neutral point of the switch operation to secure the position to the next switch-off state. In addition, a repetitive operation such as an on / off operation by a mechanism is prevented from occurring.

By providing a switch 7 that does not generate a reaction force, such as a slide switch, on the switch operating section 42 of the gear body support frame 4 as described above, a general switch which can be mass-produced at low cost as a changeover switch is provided. A simple slide switch can be used freely, and the vibration of the switch component itself under vibration conditions is almost eliminated, so that the switch rattle and the cause of malfunction are eliminated. Since the material of the body 5 can be metallized, mounting of the switch, heat creep resistance, dust resistance, etc. are improved, and heat resistance is also improved. Further, by adopting the above configuration, the space condition of the switch board is improved, and the protection circuit or the circuit corresponding to the starter can be easily inserted.

As described above, the reversing assisting elastic member 6 is provided on the gear portion body supporting frame 4, and the elastic restoring force of the reversing assisting elastic member 6 is sufficiently smaller than the operating force for operating the switch 7. Also, the elasticity difference (fall) between the above-described locking elastic member 5 and the locking elastic member 5 can be appropriately obtained. The reversing auxiliary elastic member 6
Is small as an elastic force, but stops when either one is sufficiently compressed as shown in FIG. 2 or FIG. 4 and returns to the neutral position as shown in FIG. 3 with the reversal operation of the motor. become.

Further, FIG. 10 and subsequent figures show a further simplified operating device according to the present invention, which does not use the above-described reversing auxiliary elastic members 6, 6. As shown in FIG. That is, FIGS. 10 to 12 show the general configuration and operation relationship thereof, which are formed by the conductive contact part 200 and the rotating part 207, and the engaging recess is formed on the circumferential part of the rotating part 207. 211 is provided, and the support portion 1
01 in the receiving hole 213 provided in the elastic member 20 for locking.
The rolling element 208 which forms an engagement / disengagement mechanism via 5 is opposed to the rolling element 208.

The first to third conductive contact pieces 201 are connected to the conductive region 209 and the insulating region 210 provided on the rotating body 207.
And 203 are in sliding contact with each other, and the first and second conductive contact pieces 2
Numerals 01 and 203 make sliding contact with the conductive region as shown in FIGS. 10 and 12 when the rotating part 207 rotates, and at the end of the rotation (the upper or lower limit of the gear part) as shown in FIG. Is in sliding contact with the insulating region 210 or FIG.
The second contact piece 203 is in sliding contact with the insulating region 210 as shown in FIG. For such first and second contact pieces 201 and 203,
The third conductive contact piece 202 is always in sliding contact with the conductive area throughout the rotation of the rotating body 207 and the end of the rotation.

The rotating part 207 is provided with a pivot 212, which is connected to the worm 1 and the worm wheel 2 as described above.
As shown in the figure, the switch operation unit 206 of the gear unit support frame 204 that receives the small gear 3 provided integrally with the gear unit 3 is engaged, and the worm wheel 2 and the small gear 3 are engaged by a certain load or more. Rotational operation is given to the rotating body 209 via the child 212.

Further, an insulating area 210 is provided on the rotating body 209 as shown in the figure, and a conductive contact part 200 faces the insulating area 210 to support the gear body as described above. 10 by the switching rotation operation by the frame 204.
From the one switching state to the neutral state in FIG. 11 and the other switching state in FIG.

That is, without employing the reversing auxiliary elastic members 6 and 6 shown in FIGS. 2 and 3,
It is also clear that the locking elastic member 5 can be sufficiently miniaturized to realize a stable switching operation, so that the configuration of the device can be appropriately simplified and compact, and a large difference in the rotation stopping force can be easily obtained. At the same time, it is clear that the return to the neutral state is easy and a stable switching operation is realized.

In addition to the one having the structure shown in FIGS. 10 to 12, the rolling element 208 serving as an engaging / disengaging mechanism is engaged with the elastic member 205 for locking as shown in FIG. It can be implemented as a child 216. That is, the engaging member 216 does not roll, but slides on the peripheral side of the rotating portion body 207 to be fitted into and disengaged from the engaging concave portion 211, and the switching operation similar to that shown in FIGS. Can be implemented.

Further, according to the present invention as shown in FIGS. 10 to 13 described above, flat portions 214, 214 are formed on both sides of the engaging concave portion 211 as shown in FIG. The fitting operation to the engagement concave portion 211 can be facilitated. In some cases, as shown in FIG. 15, the inclined portions 215 are provided on both sides of the engaging recesses 211, so that the engaging members 216 can be fitted more smoothly, and no special parts are required. Ensure return to neutral state.

[0038]

According to the present invention as described above, the automatic switching operation of the antenna can be realized without the need for a clutch mechanism and without generating any clutch noise. In some cases, the switch is turned on or off again due to the reversal force generated by the elastic arm member or the self-elastic reaction force of the operation wire, and furthermore due to the stacking of conditions such as the structural error of the mechanism. It can also prevent such things appropriately, simplify the overall configuration and make it easy to assemble, and can realize highly reliable and reliable automatic antenna extension and contraction operation in terms of cost etc. This invention is industrially effective.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing the general configuration of the present invention.

FIG. 2 is a sectional explanatory view of one switching operation state by the gear unit.

FIG. 3 is a sectional explanatory view of the neutral state.

FIG. 4 is a sectional explanatory view of another switching operation state.

FIG. 5 is an enlarged explanatory view of a rolling element, a rolling element holding portion, and an engagement concave portion, and also shows a fitting relationship thereof, but shows a locking elastic material moved to clarify the fitting relationship. (Actually, the gear body support frame moves).

FIG. 6 is an enlarged explanatory view showing the same relationship as that of FIG. 5 in a case where a projection is employed instead of a rolling element.

FIG. 7 is a partial cutaway side view similar to FIG. 1 showing another embodiment according to the present invention.

FIGS. 8A and 8B are explanatory diagrams showing an example of a telescopic operation circuit in which the telescopic operation device according to the present invention is employed, wherein FIG. 8A shows a radio ON state and FIG. 8B shows a radio OFF state.

FIG. 9 is an explanatory diagram of a telescopic operation circuit in which the position of adopting a relay switch is changed from that shown in FIG. 8;

FIG. 10 is a cross-sectional view similar to FIG. 2, but showing still another main part of the switching operation mechanism according to the present invention.

FIG. 11 is a sectional explanatory view showing a neutral state shown in FIG. 10;

FIG. 12 is a sectional view similar to FIGS. 10 and 11, showing the other switching state.

FIG. 13 is a partially enlarged cross-sectional view and a cross-sectional view of a switching operation state of a modification example of the engagement / disengagement mechanism in the case of FIGS.

FIG. 13 shows a modification of the rotating body.
It is the same sectional view and the sectional view showing the switching operation state.

FIG. 15 is a plan view showing a further modified example of the structure around the engagement holding portion of the rotating body as shown in FIGS.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 worm 2 worm wheel 3 small gear 4 gear body support frame 5 elastic body for locking 6 inversion auxiliary elastic material 7 slide switch 8 rolling element 9 support shaft 10 case 11 motor shaft 12 transmission gear 13 rotator 15 antenna element 18 motor Reference Signs List 20 intermediate gear unit 41 rolling element holding unit 42 switch operating unit 43 opening 51 engaging recess 71 operating unit 81 engaging unit 101 supporting unit 102 mounting unit 200 conductive contact part 201 first conductive contact 202 Third conductive contact piece 203 Second conductive contact piece 204 Gear section support frame 205 Locking elastic section 206 Switch operating section of gear section support frame 207 Switch rotating section 208 Roller forming a disengagement mechanism Moving body 209 Conductive area of rotating body 210 Insulated area of rotating body 211 Engagement recess of switch rotating body 212 Switch times Entrance 213 of the rolling part 213 Receiving hole 214 Flat part formed on both sides of the engaging recess of the switch rotating part 215 Guide part 216 formed on both sides of the engaging part of the switch rotating part Ball

Claims (3)

(57) [Claims] 1. A rotator, such as a drum or a gear for extending and retracting an antenna element via a wire or a rope, is rotated via a worm wheel or a transmission gear engaged with a worm driven by a motor, and A wheel provided with an intermediate gear unit integrally formed with the transmission gear or a small gear unit engaged with the rotating body, wherein a switch operating unit for operating a limit switch provided in the motor drive circuit is connected to the intermediate unit; A gear portion supporting frame for the gear portion, a locking elastic portion attached to the gear portion supporting frame, and the gear portion between the locking elastic portion and the gear portion supporting frame. An automatic antenna expansion / contraction operation device, comprising an engagement / disengagement mechanism that regulates a movement torque of a support frame. 2. A limit switch provided in a motor drive circuit, wherein a switch having a mechanism that does not substantially generate a reaction force at the time of a switching operation is mounted, and said switch is mounted on a gear body support frame having a switch operating portion for operating said switch. The intermediate gear portion is movably mounted on the shaft and a reversing auxiliary elastic member is provided. In addition, a locking elastic portion is attached to the gear portion supporting frame, and the intermediate elastic portion is interposed between the intermediate portion and the locking elastic portion. 2. The automatic antenna expansion / contraction operation device according to claim 1, further comprising an engagement / disengagement mechanism that regulates the gear unit support frame moving torque. 3. A rotary switch is provided as a limit switch provided in a motor drive circuit, a disk-shaped rotating member having a conductive region and an insulating region is used, and a conductive contact piece sliding on the rotating member is provided. The one of the conductive contact pieces is positioned on the insulating region by the rotation of the rotating member, and the gear member supporting frame movable by the intermediate gear member described above. A part of the circumference of the rotating part to be rotated is provided with an engaging and disengaging recess through an elastic part for locking so as to regulate the movement torque of the gear part supporting frame. The automatic antenna telescopic operation device according to claim 1, wherein