JPH0363841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an antenna telescoping operation mechanism, which enables both automatic antenna telescoping and manual antenna telescoping operations, and is simple in mechanism and easy to manufacture and assemble. In either case, the purpose is to provide a mechanism that is smooth and eliminates clutch sounds and other noises.

2. Description of the Related Art As is well known, there are two types of in-vehicle antennas used in automobiles and the like: those that extend and retract by manually holding the antenna element, and those that extend and retract automatically using a motor. In other words, in the latter case, which automatically expands and contracts using a motor, the antenna can be expanded and contracted appropriately by operating a switch inside the car. This is extremely advantageous because it allows you to operate the antenna without ever leaving the vehicle.
In recent years, it has become widespread. However, despite the great merits of such an automated system, in actual use, the antenna is expanded and retracted unconsciously, so there are many cases where people leave the vehicle with the antenna extended. In such a case, there is a disadvantage of having to open the door again, enter the car, and operate a switch to retract the antenna, and in such a case, the advantage of automation becomes a disadvantage. Therefore, some proposals have been made to realize the above-mentioned automatic expansion and contraction as well as to enable manual expansion and contraction of the antenna, but these conventional methods require complicated structures and manufacturing and assembly. This has disadvantages such as making the process complicated and unavoidable generation of clutch sounds and other noises. In other words, what makes such automatic and manual antenna extension and contraction possible is to use a multi-striped worm as a motor-driven worm and rotate this multi-striped worm using the manual antenna extension/contraction operation force. There are some that enable manual operation, and others that employ a planetary gear mechanism and use an electromagnet to engage and disengage the planetary gear in an interlocking system for winding the telescopic operation wire by a motor.
In the case of the former, which uses a multi-thread worm, the deceleration relationship that is an advantage of using a worm in a winding drum rotation drive system using such a motor is largely lost, and the worm mechanism It is necessary to incorporate a separate reduction mechanism between the section and the winding drum.
In addition, in the case of the latter planetary gear, it is necessary to incorporate an electromagnet together with the planetary gear, and it is also essential to form a power supply system for the electromagnet and turn it on and off appropriately at each point in time. be. Of course, in any of these cases, a clutch mechanism is formed to prevent an excessive load from being applied to the operating wire at the extension or retraction limits of the antenna, and the clutch mechanism is used to prevent the operation wire from being interlocked when a load exceeding a predetermined value is applied. It is also necessary to terminate the relationship. Therefore, it is clear that a conventional antenna capable of both automatic and manual expansion and contraction has a considerably complicated structure, which naturally makes manufacturing and assembly difficult.
In addition to being expensive, the clutch mechanism inevitably generates other noises when the clutch is engaged and disengaged.

The present invention was devised after repeated studies in view of the above-mentioned circumstances, and includes a deceleration mechanism section between a drum that receives a wire for expanding and contracting an antenna element and a motor section that drives the drum. A rotary shaft driven by the speed reduction mechanism is provided, and the drum is rotated by the rotary shaft to receive the wire, wherein the rotary shaft rotates together with the rotary shaft between the rotary shaft and the drum. An engaging and disengaging rotary body is provided, and a clutch body is provided that engages and disengages from the engaging and disengaging rotary body, and a cam portion formed on the engaging and disengaging body is positioned in a latch receiving hole formed in the clutch body. and a locking element that is operated to engage and disengage from an engaging part formed on the drum by the cam part, and the drum is automatically rotated by the action of a motor part, and is automatically rotated by the motor part. In a stopped state, the engagement between the drum and the retainer is released to allow manual expansion and contraction of the antenna element. The drum can be formed with a gear that engages with the rack so that the wire can be fed out or retracted by rotation of the drum and received into the drum.

Specifically, a specific embodiment of the present invention as shown in the attached drawings will be described.A plurality of antenna elements 1 that are telescopically expanded and contracted are shown in the accompanying drawings.
The base body 1 has an antenna base cylinder 11 accommodating the antenna 8 attached to one side, and has a motor unit 10 on the other side.
The winding drum provided on the base body 1 is rotated (normally or reversely) by the drive of the motor section 10, and the operation wire connected to the uppermost element 18a of the antenna element 18 is expanded and contracted. Although some aspects are similar to the above-described conventional automatic antenna expansion/contraction operation mechanism, the present invention adopts the configuration shown in FIG. 2 and subsequent figures for such a mechanism. In other words, the base body 1 is provided with a shaft mounting hole 13, an operating wire guide groove 14, a protrusion 12, a stepped portion 15, etc., as shown clearly in FIG. 3 as well as FIG. , on both sides there is a winding drum 2 and a worm 1 driven by a motor section 10.
In this embodiment, the rotating shaft 8 and the tightening shaft 9 are inserted into the worm wheel 6, and the shaft portion 62 of the worm wheel 6 is inserted into the shaft mounting hole 13. Then, it is assembled between the cover parts 5 and 7 on both sides. Note that the worm wheel 6 and the rotating shaft 8 may be integrally molded because they do not rotate relative to each other and do not slide in the axial direction. In this case, the drum 2 has a lock engaging portion 21 formed inside thereof, and a clutch ring 3 is installed in the inner cavity 20 of the drum 2. A hole 31 is formed in a part thereof, and engaging protrusions 32 and 33 are provided on both sides of the lock receiving hole 31.
The inner hole 30 is provided with a locking/disengaging rotary body 4 attached to the above-mentioned rolling shaft 8, and locking portions formed on both sides of the rolling shaft 8 are installed inside the inner hole 30. The locking surfaces 44, 44 in the insertion hole 40 of the engaging/disengaging rotary body 4 engage with the worm wheels 81, 81, and the worm wheel 6
This rotation is transmitted to the engagement/disengagement rotating body 4. A part of the outer peripheral surface of the engaging and disengaging rotating body 4 is provided with an engaging stepped portion 4 that engages with the above-mentioned engaging protrusions 32 and 33.
2 and 43 are formed with an angle suitably larger than that of the engaging protrusions 32 and 33. Further, a valley-shaped cam portion 41 is formed between the engaging protrusions 42 and 43, and the lock receiving hole 31
Further, as shown in FIGS. 2 and 4, an elastic material 26 is interposed in the lock receiving hole 31, and inner and outer locks 27, 28 are positioned therein. 27 is connected to the valley-shaped cam 41, and the retainer 28 is connected to the engaging portion 21 described above. The cover body 7 may be formed integrally with the base body 1 if the stepped portion 15 of the base body 1 described above is made to be an opening so that the worm wheel 6 can be fitted therein.

In the case shown in FIGS. 2 and 3, the drum 2 is formed separately from the outer drum 2a, so that the engaging protrusion 23 provided on the drum 2 is engaged with the engaging hole 24 formed on the drum 2a. The rotary shaft 8 is fitted into the shaft hole 25a of the outer drum 2a so that they rotate together, and as shown in FIG. Although a wire winding groove 29 is formed, it goes without saying that such drums 2 and 2a may be formed integrally, and an example of such an integrally formed drum is as shown in FIGS. 6 and 7. That is, the integrally formed drum 2b is formed with a locking engagement part 21 and a wire winding groove 29, which is the same as in FIGS. 2 and 3, but the end face part 25 having a shaft hole 25a is About drum 2b
It may be formed on either end surface. Further, as shown in FIG. 2, the rotating shaft 8 is provided with a locking ring mounting groove 82.
are arranged as appropriate, and the mounting positions of the engaging/disengaging rotary body 4 and the worm wheel 6 are regulated by a locking member 83 such as an E-ring, and the presser bullet plate 36 is loosely installed and attached to the end face of the clutch body 3. The clutch member 3 is adapted to be joined to maintain the axial mounting position of the clutch member 3 in a constant state. Regarding the above-mentioned retainers 27 and 28, roller-shaped ones are shown in the case of the ones shown in the figure, but of course, the same effect as the roller-shaped ones can be obtained by using pipe-shaped ones, and spherical ones can also be used. Further, a hemispherical shape or other shape may be adopted as appropriate. Some hemispherical shapes have a protrusion formed on the top of the hemisphere that engages with the inner hole of the elastic material 26 in the form of a spiral coil. If a hemispherical recessed surface is formed and a fitting or engagement portion for a coiled spring is provided in the inner part of the hemispherical recessed surface, the elastic material 26 can also be accommodated in the hemispherical recessed surface portion. By using a relatively long elastic material within a limited space, the functions of the present invention described below can be achieved accurately.
Of course, in addition to the above-mentioned shape, any other suitable shape may be adopted as long as it can properly engage and disengage the engaging portion 21 and the trough-shaped cam portion 41 as will be described later. The engagement/disengagement relationship may be provided oppositely on the inside. The elastic material 26 is not limited to the coil spring shown in the figure, but may be a rubber material with an inner hole or a retainer 2 at the tip.
A rubber material having engaging portions for the parts 7 and 28 may be used as appropriate, and in short, any material that can achieve the effect described later by its restoring force may be used.

To explain the operation of the embodiment of the present invention as described above, as shown in FIG. 4 and FIG. In a stationary state in which the locking member 27 is not applied to the drum 2, the locking member 27 is located in the middle of the valley-shaped cam portion 41, and in this state, the elastic member 26 is hardly compressed, and the engagement portion between the locking member 28 and the drum 2 is not compressed. 21, as shown in FIG. 4. Therefore, in this state, the drum 2 can rotate without involving the clutch ring 3 or the engagement/disengagement rotating body 4, and the engagement/disengagement rotation body 4 can be rotated. Part 21 is Kaiko Ukeana 3
1 is positioned sideways or downward, and even if the locking element 28 is engaged with the engaging part 21, when the drum 2 rotates, the locking element 28 will be pushed out of the engaging part 21 and moved into the area of the clutch body 3. The drum 2 can rotate with almost no resistance simply by being housed in the drum. In other words, when the extended antenna element 18 is manually pushed in and the wire 19 is pushed into the drum 2 accordingly, the drum 2 rotates under conditions with almost no pores, and the wire 19 is rotated when the antenna is manually retracted. You can make a turn. Similarly, even when the antenna element is manually pulled out, it is clear that the antenna element can be pulled out (rotation of the drum 2) with almost no resistance.

On the other hand, when the rotational force by the worm 16 is applied to the engagement/disengagement rotating body 4 via the worm wheel 6 and the rotating shaft 8, it depends on whether it is in the forward or reverse direction. As shown in FIG.
At the same time as the engaging step portion 42 or 43 rotates to join the engaging protrusion 32 or 33 as described above, the engaging member 27 moves into the valley-like cam portion 4.
1, compresses the elastic member 26, and pushes the retainer 28 into the engaging portion 21 through the elastic member 26, thereby engaging and integrating the clutch body 3 and the drum 2. Rotate. That is, the rotational force by the motor section 10 is accurately transmitted to the drum 2,
Automatic expansion and contraction operation of the antenna element 18 can be realized.

In addition, to explain the clutch action during automatic antenna extension/retraction operation by motor drive, when the motor is driven in the state shown in Figure 5, a load exceeding a predetermined value (at the antenna extension limit, retraction limit, etc.) For example, when a force of 5 kg) is applied, the retainer 28 further presses the elastic member 26 and is released from the engaged state with the engaging portion 21, that is, the clutch becomes in a clutch-off state and continues to rotate. In this embodiment, when the clutch body 3 rotates once, the locking member 28 is moved back to the engaging portion 2.
During the rotation of the clutch body 31, the antenna is generally expanded and contracted by about 20 cm, and an appropriate position for one rotation operation is determined. motor part 10
By turning off the switch 28
It is possible to effectively stop the rotation operation at a position where the switch does not engage with the engaging portion 21 again, and even if the engaging/disengaging relationship is provided on both sides as described above, it is possible to effectively stop the rotation operation of the switch. By setting the relationship, there will be no clutch sound or other noise in any case.

The ones in Figures 1 to 5 above are drum 2.
The wire 19 is wound and unwound by the rotational force of the wire 19, but the present invention can also be implemented with partial modifications as shown in FIG. That is, whereas the above-mentioned operating wire 19 is a simple strip, in the case of FIG. 8, a rack part 19r is formed on one side of the wire 19, and a A ring-shaped wire guide 35 is attached thereto, and the wire 19 drawn out from the wire guide groove 14 of the base body 1 is received into the wire guide 35 and then transferred to the drum 2 side. A gear portion 36 is formed at the end of the drum 2 on the side of the base body 1 as described above, and this gear portion 36 engages with the rack portion 19r as described above, and the wire 19 is guided by the wire guide 35. It is designed to allow for feeding or retraction, and for other configurations, please refer to the first
It is the same as that shown in Figure 7.

It is clear that according to the present invention as described above, it is possible to automatically extend and retract the antenna by driving a motor, and also to smoothly perform manual antenna extension and retraction operations with almost no resistance. Yes, and its configuration is such that this type of automatic telescoping operation 8 is provided between the winding drum and the motor-driven rotating shaft.
Since the engaging/disengaging rotary body provided between the clutch body and the rotating shaft, which is an essential mechanism in the mechanism, is provided, the structure is extremely compact, and the cam portion formed on the engaging/disengaging rotary body allows Since the clutch ring is simply engaged with and disengaged from the engaging portion formed on the winding drum by operating the retainer provided in the retainer receiving hole of the clutch ring, automatic and manual operation can be performed using the clutch mechanism. Therefore, switching can be easily achieved, the structure is simple, manufacturing and assembly is easy, the desired product can be obtained at low cost, and clutch noise and other noise generation can be almost properly eliminated. This invention has the following effects and has great industrial effects.

[Brief explanation of drawings]

The drawings illustrate embodiments of the invention,
Fig. 1 is a front view showing the general relationship of the antenna telescoping operation mechanism according to the present invention, Fig. 2 is a longitudinal cross-sectional side view of the base body portion thereof, and Fig. 3 is an exploded state of each component. Slope map, No. 4
The figure is a front view of the clutch ring, the engaging/disengaging rotary body, and the winding drum section in a state where the antenna is manually extended/retracted; Figure 5 is a front view of the automatic antenna extension/retraction state; and Figure 6 is a front view of the winding drum. FIG. 7 is a sectional view of another embodiment, and FIG. 8 is a perspective view of the drum and clutch ring portions of still another embodiment of the present invention. In these drawings, 1 is a base member, 2, 2a and 2b are winding drums, 3 is a clutch ring, 4 is an engagement/disengagement rotating body, 5 and 7 are cover members,
6 is a worm wheel, 8 is a rotating shaft, 10 is a motor section, 16 is a worm, 18 is an antenna element, 19
is the wire, 19r is the rack part, 20 is the inner cavity,
21 is an engaging portion, 26 is an elastic material, 27 and 28 are anchors, 30 is an inner hole, 31 is an anchor receiving hole portion, 32, 3
3 is a locking portion, 35 is a wire guide, 36 is a gear portion thereof, 40 is an insertion hole, 41 is a cam portion, 42, 43
1 and 2 respectively indicate the engagement step portions.

Claims (1)

[Scope of Claims] 1. A deceleration mechanism and a rotating shaft driven by the deceleration mechanism are provided between a drum that receives a wire for extending and contracting the antenna element and a motor that drives the drum, In the device in which the drum is rotated by the rotating shaft to receive the wire, an engaging/disengaging rotary body that rotates together with the rotating shaft is provided between the rotating shaft and the drum; a clutch part body, and an engagement part positioned on a cam part formed on the engaging/disengaging rotary body in a lock receiving hole formed in the clutch part body, and formed on the drum by the cam part. A latch is provided which is operated to engage and disengage from the clutch, and a latch is provided on the clutch body, and a latch is provided on both sides of the cam portion of the engagement and disengagement rotating body to be engaged with the latch under the driving condition of the rotating shaft. An antenna extension/retraction operation mechanism, characterized in that an engagement step part is provided for regulating the relative position of the engagement/disengagement rotating body with respect to the clutch body. 2. A drum rotatably provided with respect to the base body to which the motor unit is attached is a winding drum for the wire that expands and contracts the antenna element, and the motor unit drives the winding drum to automatically rotate the wire. The antenna expansion/contraction operation mechanism according to claim 1, wherein the antenna element is expanded and contracted by winding and unwinding. 3. A rack part is formed on the wire for extending and contracting the antenna element, a wire guide is attached to the base body to which the motor part is attached, and a gear part is formed on the drum to engage with the rack part of the wire described above, and the wire is connected to the drum. The antenna expansion and contraction operation mechanism according to claim 1, wherein the antenna element is expanded and contracted by automatically feeding and retracting the wire by driving the motor section.