JP2580634Y2 - Contact structure of motor drive control circuit in vehicular electric antenna device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact structure of a motor drive control circuit in a vehicle electric antenna device provided in a vehicle such as a private car, a bus, and a truck.

[0002]

2. Description of the Related Art
In this kind of vehicle electric antenna device, a motor driving control for driving a motor for expanding and contracting an antenna includes a rotating body made of an insulating material that rotates in connection with the rotation of the motor, and a relay provided integrally with the rotating body. Plate, a first contact plate which is always in sliding contact with the relay plate, and a second, which is in sliding contact with a conductive portion corresponding position provided on the relay plate.
Using the third contact plate, and the rotation of the relay plate accompanying the forward and reverse rotation drive of the motor, the second or third contact plate from the conductive portion to the non-conductive portion to form a forward and reverse rotation drive circuit of the motor. There is a configuration in which the antenna is extended and retracted by driving the motor forward and reverse while one of the second and third contact plates is in contact with the conductive portion. In this case, in order to secure the necessary expansion and contraction length of the antenna, there is a case where the opposing interval between both ends of the non-conductive portion must be wider than the opposing interval of the second and third contact plates. . However, in this case, when the antenna is forcibly pulled or pushed in by an external load or the like, as shown in FIG. 11, the relay plate 12 pivots more than necessary and the motor becomes overrun. There is a possibility that both the second and third contact plates 14 and 15 may reach the position of the non-conductive portion 10, and in this case, both the forward and reverse drive circuits of the motor are disconnected. After that, the power cannot be supplied to the motor in any way, and the expansion and contraction operation of the antenna becomes inoperable, and the reliability of the product becomes a problem.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its object to provide a contact structure of a motor drive control circuit in a vehicle electric antenna device which can eliminate these disadvantages. And
The first invention is to provide a motor drive control circuit for controlling the drive of the antenna extension / contraction motor, a rotating body made of an insulating material that rotates in connection with the rotation of the motor, a relay plate provided integrally with the rotating body, A first contact plate which is always in sliding contact with the relay plate, and a second and third contact plate which is in sliding contact with a position corresponding to the conductive portion provided on the relay plate; and one of the second and third contact plates Is connected to one end of the non-conductive portion from the conductive portion with the forward rotation of the motor, thereby cutting off the normal rotation drive circuit of the motor, and the other is connected to the other end of the non-conductive portion from the conductive portion with the reverse rotation of the motor. The reverse rotation drive circuit of the motor is configured to be cut off, and the forward and reverse drive of the motor is performed while one of the second and third contact plates is in contact with the conductive portion. In the vehicular electric antenna device configured to perform contraction, the opposing interval between both ends of the non-conductive portion is set to be wider than the opposing interval of the second and third contact plates, and the required expansion and contraction length of the antenna is set. In securing the auxiliary contact plate connected to have the same polarity as one of the second and third contact plates on the side leading to the non-conductive portion prior to the one contact plate. And at a position set so that the facing distance with one contact plate is narrower and the facing distance with the other contact plate is wider than the facing distance between both ends of the non-conductive portion. It is characterized by being arranged.

In a second aspect of the present invention, a motor drive control circuit for controlling the drive of the antenna extension / contraction motor is provided integrally with a rotating body made of an insulating material which rotates in connection with the rotation of the motor. A relay plate, a first contact plate which is always in sliding contact with the relay plate, and second and third contact plates which are in sliding contact with the conductive portion corresponding positions provided on the relay plate; and wherein the second and third contacts are provided. One of the plates cuts off the normal rotation drive circuit of the motor by moving from the conductive portion to one end of the non-conductive portion with the forward rotation of the motor, and the other plate is disconnected from the conductive portion by the reverse rotation of the motor. The reverse rotation drive circuit of the motor is cut off by reaching the other end of the conductive part, and the motor is rotated forward or backward while one of the second and third contact plates contacts the conductive part. In the vehicular electric antenna device configured to extend and contract the antenna by moving the antenna, the opposing interval between both ends of the non-conductive portion is set wider than the opposing interval of the second and third contact plates. In securing the required expansion and contraction length, one of the second and third contact plates has a contact plate,
The distance between the contact position of one of the contact plates is smaller than the distance between both ends of the non-conductive portion on the side leading to the non-conductive portion prior to the one contact plate, An auxiliary contact is further provided at a position where the distance between the other contact plate and the contact position is set to be wider.

[0005] The present invention is, Yotsute to this configuration, was the
This prevents the motor from becoming inoperative even when the overrun state occurs.

[0006]

Next, a first embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes an electric antenna device mounted on a vehicle. The electric antenna device 1 includes a worm wheel 4 for inputting power from a motor 3 to a case body 2 via a worm (not shown), and the worm. An intermediate gear 5 meshing with a small-diameter gear 4a integrally formed with the wheel 4, an operating gear 7 interlockingly connected to the intermediate gear 5 via a clutch 6 having a torque limiter function, a drive cord 8 meshing with the operating gear 7, The drive code 8
The operation gear 7 extends the drive cord 8 into the antenna main body 9 as the motor 3 is driven to extend the antenna main body 9, while the operating gear 7 extends the antenna main body 9. Is wound around the cord case 8a to reduce the size of the antenna main body 9, and each of these configurations is a conventional configuration.

Reference numeral 11 denotes a rotating body made of an insulating material such as a resin material which is rotatably supported on one side surface 2a of the case body 2. A gear 11a is engraved on the outer peripheral edge of the rotating body 11. And is engaged with a cam 4c formed on an end surface of a worm wheel shaft 4b protruding from one side surface 2a of the case body,
One gear 11a of the rotating body 11 is moved each time the cam 4c makes one rotation with the driving of the motor 3, and thus the rotating body 11 intermittently rotates forward and backward. I'm sorry. A relay plate 12 formed of a conductive metal plate is integrally attached to the surface of the rotating body 11, and the relay plate 12 has a part of an outer peripheral edge portion cut out. , Here the rotating body 11
The conductive portion 12a on which the relay plate 12 is located at the same diameter position of the rotating body 11 is exposed.
And the non-conductive portion 10 in which the rotating body 11 is exposed without being present.

On the other hand, 13, 14, and 15 are first,
The second and third contact plates, and the base ends of these contact plates 13, 14, 15 are the case 2
Is integrally attached to a plate holder 16 screwed to one side surface 2a. The contact 1 provided at the tip of the first contact plate 13 connected to the positive pole
Reference numeral 3a is disposed at the center side where the relay plate 12 is always in sliding contact with the relay plate 12, but both forward and reverse contacts 14a are provided at the distal ends of the second and third contact plates 14, 15 which are both connected to the negative pole. The contact 15a is provided so as to correspond to a certain position of the conductive portion 12a and the non-conductive portion 10. Reference numeral 17 denotes a forward / reverse switching relay switch. A relay coil 17a for switching the relay switch 17 is connected to a circuit provided with a main switch 18. And the main switch 18
Of the relay coil 17a is turned on or off by operating the relay coil 17a to the extension side or the reduction side.
7 conducts with the extension side terminal 17b or the reduction side terminal 17c, whereby the circuit on the second contact plate 14 side provided with the forward contact 14a or the reverse contact 15
When the circuit on the third contact plate 15 side provided with a is in a continuous state, the corresponding motor 3 is driven forward and reverse.

In this case, when the main switch 18 is operated to the extension side in a state where the antenna main body 9 is contracted, the second contact plate 1 contacting the conductive portion 12a is provided.
The power for normal rotation is supplied to the motor 3 through 4, whereby the motor 3 is driven to rotate forward and the antenna body 9 is extended. The antenna body 9 is connected to the forward rotation of the motor 3.
The rotating body 11 rotates intermittently in synchronization with the extension of the antenna, and when the antenna main body 9 reaches a predetermined length, the forward rotation contact 14a is connected to one end of the non-conductive portion 10. When the motor 3 reaches the side 10a, the contact with the conductive portion 12a is cut off, whereby the forward rotation of the motor 3 is stopped. On the other hand, in the extended state, the reverse contact 15a is in contact with the conductive portion 12a. Therefore, when the main switch 18 is operated to the reduction side, reverse power is supplied to the motor 3 in the opposite manner. , The reverse rotation contact 15a is
Until the other end 10b is reached and the contact with the conductive portion 12a is cut off, whereby the antenna main body 9 is reduced. In such a case, in order to secure a necessary expansion and contraction length (stroke) of the antenna main body 9, one end of the non-conductive portion 10 and two ends 10
The facing distance A between a and 10b is set to be wider than the facing distance B between both contacts 14a and 15a of the second and third contact plates 14 and 15 (A> B).

Reference numeral 19 denotes an auxiliary contact plate. The base end of the auxiliary contact plate 19 is integrally fixed to the contact plate holder 16, and the distal end has a relay plate at a position corresponding to the conductive portion. 1
The auxiliary contact plate 19 is wired to have the same polarity as the third contact plate 15 in the first embodiment. The arrangement position of the auxiliary contact plate 19 is set as follows. That is, when the rotating body 11 rotates in the reverse rotation direction (in the direction of the arrow X) with respect to the third contact plate 15, the auxiliary contact plate 19 moves to the side reaching the other end 10 b of the non-conductive portion 10 before this. The position of the auxiliary contact 19a of the auxiliary contact plate 19 is located at both ends 10a, 10a of the non-conductive portion.
b, the third contact plate 1
5, the distance C facing the contact 15a is narrower (A> C),
The distance D between the second contact plate 14 and the contact 14a is set so as to be wider (A <D). And, in this way, the auxiliary contact 1
By setting the position of the contact 9a, the reverse contact 15a is set.
Is located on the other end 10b side of the non-conductive portion 10, and the forward contact 1
In a normal stop position state where 4a is located on the conductive portion 12a on the side, the auxiliary contact 19a is at a position biased toward the one end 10a side of the non-conductive portion 10 (see FIG. 2).
Because the rotating body 11 has rotated to the reverse rotation side more than necessary due to receiving some external load such as pushing in more than necessary,
When the forward contact 14a reaches the non-conductive portion 10 as shown in FIG. 3, the auxiliary contact 19a is moved to the non-conductive portion 10a.
Is set so as to reach the conductive portion 12a beyond one end 10a.

In the embodiment of the present invention constructed as described above, the motor 3 is driven forward / reversely in conjunction with operating the main switch 18 to the extension side or the reduction side as described above, and the antenna body 9 is moved. The extension and retraction operation is performed for the required length. In this case, however, the rotating
1 may be rotated more backward than necessary, and the forward contact 14a may be located in the wide non-conductive portion 10 together with the reverse contact 15a. However, even in this case, the main switch 1
By operating the motor 8 on the reduction side, the motor 3 is driven.

That is, as described above, if both the forward / reverse rotation contacts 14a and 15a are located on the non-conductive portion 10 for some reason, the power supply circuit for the forward / reverse rotation to the motor without the conventional auxiliary contact plate 19 is provided. Is refused,
No matter how the main switch 18 is operated, the motor 3 is not driven, but in this case, the auxiliary contact 19a connected to have the same polarity as the reverse contact 15a and the forward contact 14a are non-conductive. At the stage when it is determined that the conductive portion 12a is located at the portion 10, the conductive portion 12a comes into contact with the conductive portion 12a. Therefore, by operating the main switch 18 to the reduction side, the motor 3 is driven to the reverse rotation side, and the normal stop position state, that is, the auxiliary contact 19a and the reverse contact 15a are both in the non-conductive portion 10. However, the forward contact 14a stops when the normal stop position is reached at the conductive portion 12a.
Thereafter, the normal antenna expansion / contraction operation is performed. In this case, the reduction operation of the antenna body 9 is performed by the clutch 6
Therefore, there is no problem because the power is turned off.

The present invention is, of course, not limited to the above embodiment, and the auxiliary contact plate may be provided on the second contact plate side by setting the same position as described above. It is also possible to provide both. Further, an auxiliary contact may be integrally provided on the second or third contact plate as in the second embodiment described below.

That is, in the second embodiment, as shown in FIGS. 6 to 10, unlike the first embodiment, the second contact plate 14 is provided with an auxiliary contact 14c according to the present invention. Have been. In other words, when the rotating body 9 rotates in the normal rotation direction (the direction of the arrow Y), the second contact plate 14 is provided with an auxiliary side that passes through the one end 10a of the non-conductive portion 10 prior to the normal rotation contact 14a. Plate 1
4b protrudes, and the auxiliary contact 14c is provided at the tip thereof. The position of the auxiliary contact 14c is set with respect to the facing distance A between the both ends 10a and 10b of the non-conductive portion.
The distance E facing the forward contact 14a is smaller (A>
E), the interval F facing the reverse contact 15a is wider (A
<F) It is set to be the position set to be as follows. By setting the position of the auxiliary contact 14c in this manner, the forward contact 14a is connected to the non-conductive portion 10c.
In the normal stop position in which the reverse contact 15a is located on the one end 10a side of the non-conductive portion 10a and the reverse contact 15a is located on the conductive portion 12a on that side, the auxiliary contact 14c is at a position biased toward the other end 10b of the non-conductive portion 10 (FIG. 6 reference) is rotated in the reverse rotation side unnecessarily rotating body 11 to or receive some external load, the forward rotation tangent
When the state up to the point 14a reaches the non-conductive portion 10 as shown in FIG. 7, the auxiliary contact 14c is connected to the other end 1 of the non-conductive portion 10.
0b is set so as to reach the conductive portion 12a.

[0015] In addition, the following considerations are also made in this device. That is, when two contacts 14a and 14c are formed on one contact plate 14,
It is practically difficult to work so that the 4a and 14c are in contact with each other, and one of the contacts mainly comes into contact, and the reliability is impaired. Therefore, in the second embodiment, the amount of protrusion G of the auxiliary contact 14c from the plate surface is smaller than the amount of protrusion H of the forward contact 14a from the plate surface (G <
H) On the other hand, the surface portion of the rotating body 11 exposed as the non-conductive portion 10 has a groove depth J deeper than the difference (HG) between the protrusion amounts of the two contact points 14a and 14c (HG) ( J>
HG) is set as the concave groove 11b. Accordingly, in the second contact plate 14, in the normal state, the forward contact 14a is in sliding contact with the conductive portion 12a and the non-conductive portion 10 (that is, the concave groove 11b), and the auxiliary contact 14c is in the conductive portion. Although it does not come into sliding contact with the non-conductive portion 12a and the non-conductive portion 10, as described above, the rotating body 9 abnormally rotates more than necessary, causing the motor 3 to overrun, and both the forward and reverse rotation contacts 14a and 15a become non-conductive portions. 10, the contact 14a for normal rotation falls into the concave groove 11b, and the auxiliary contact 14c is located at the position of the conductive portion 12a and comes into contact with the conductive portion 12a.
Even with the provision of 4a and 14c, reliable and stable electrical contact can be performed, and there is no fear of causing malfunction.

The facing distance between the non-conductive portions and the facing distance between the contact plates and the like shown in FIGS. 4 and 10 should be indicated by the circumference, but a straight line should be used as an approximation. Has been simplified.

[0017]

[Effect] In summary, since the present invention is constructed as described above, the main switch is operated to the extension side or the reduction side, and the motor is driven forward and reverse to extend the antenna body to the required length. Only the telescopic operation,
In this case, even if the rotating body is rotated more than necessary due to an unreasonable external load, and both the forward and reverse rotation contacts may be located in the wide non-conductive portion, the operation of the main switch may be difficult. As a result, the motor is driven.

That is, as described above, if both the forward and reverse rotation contacts are located in the non-conductive portion for some reason, the power supply circuit for the forward and reverse rotation to the motor is cut off without the conventional auxiliary contact plate. Therefore, the motor cannot be driven by operating the main switch in any way. However, in this device, the auxiliary contact connected to have the same polarity as one contact is located at the non-conductive portion. To come into contact with the conductive part at the stage when the
The motor can be driven by operating the main switch.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an electric antenna device.

FIG. 2 is a front view showing a normal stop position in the electric antenna device.

FIG. 3 is a front view showing a state in which the motor stops in an overrun state in the electric antenna device.

FIG. 4 is an enlarged explanatory view of a main part.

FIG. 5 is a schematic diagram showing a drive control circuit of the motor.

FIG. 6 shows an electric antenna device according to a second embodiment.
It is a front view showing a regular stop position.

FIG. 7 shows an electric antenna device according to a second embodiment.
It is a front view showing the state where the motor stopped in the overrun state.

FIG. 8 is an operation explanatory view showing a normal stop position in the second embodiment.

FIG. 9 is an operation explanatory view showing a state in which the motor stops in an overrun state in the second embodiment.

FIG. 10 is an enlarged explanatory view of a main part of the second embodiment.

FIG. 11 is a front view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 3 electric motor 4c cam 9 antenna body 10 non-conductive part 11 rotating body 12 relay plate 12a conductive part 13 first contact plate 14 second contact plate 14c auxiliary contact 15 third contact plate 19 auxiliary contact plate

Claims (3)

(57) [Scope of request for utility model registration] A motor drive control circuit for controlling the operation of a motor for expanding and contracting an antenna includes: a rotating body made of an insulating material that rotates in connection with the rotation of the motor; a relay plate provided integrally with the rotating body; A first contact plate which is always in sliding contact with the relay plate, and a second and third contact plate which is in sliding contact with a position corresponding to the conductive portion provided on the relay plate; and one of the second and third contact plates Is connected to one end of the non-conductive portion from the conductive portion with the forward rotation of the motor, thereby cutting off the normal rotation drive circuit of the motor, and the other is connected to the other end of the non-conductive portion from the conductive portion with the reverse rotation of the motor. The reverse rotation drive circuit of the motor is configured to be cut off, and the forward and reverse drive of the motor is performed while one of the second and third contact plates is in contact with the conductive portion. In the vehicle electric antenna device configured to expand and contract, the opposing interval between both ends of the non-conductive portion is set to be wider than the opposing interval of the second and third contact plates, and the required expansion and contraction length of the antenna is set. In securing the auxiliary contact plate connected to have the same polarity as one of the second and third contact plates on the side leading to the non-conductive portion prior to the one contact plate. And at a position set so that the facing distance with one contact plate is narrower and the facing distance with the other contact plate is wider than the facing distance between both ends of the non-conductive portion. A contact structure of a motor drive control circuit in a vehicle electric antenna device, wherein the contact structure is provided. 2. A motor drive control circuit for controlling the operation of a motor for expanding and contracting an antenna, comprising: a rotating body made of an insulating material that rotates in connection with the rotation of the motor; a relay plate provided integrally with the rotating body; A first contact plate which is always in sliding contact with the relay plate, and a second and third contact plate which is in sliding contact with a position corresponding to the conductive portion provided on the relay plate; and one of the second and third contact plates Is connected to one end of the non-conductive portion from the conductive portion with the forward rotation of the motor, thereby cutting off the normal rotation drive circuit of the motor, and the other is connected to the other end of the non-conductive portion from the conductive portion with the reverse rotation of the motor. The reverse rotation drive circuit of the motor is configured to be cut off, and the forward and reverse drive of the motor is performed while one of the second and third contact plates is in contact with the conductive portion. In the vehicle electric antenna device configured to expand and contract, the opposing interval between both ends of the non-conductive portion is set to be wider than the opposing interval of the second and third contact plates, and the required expansion and contraction length of the antenna is set. In securing the second contact plate, one of the second and third contact plates is a side that reaches the non-conductive portion prior to the one contact plate, and
With respect to the opposing distance between both ends of the non-conductive portion, a position where the opposing distance with the contact position of one contact plate is narrower and the opposing distance with the contact position of the other contact plate is set wider. A contact structure of a motor drive control circuit in the vehicular electric antenna device, further comprising an auxiliary contact provided on the vehicle. 3. The method according to claim 2, wherein the amount of protrusion of the auxiliary contact provided on one of the contact plates is set smaller than the amount of protrusion of the main contact. A contact groove of a motor drive control circuit in the vehicular electric antenna device, wherein the groove is set so as to be deeper than the difference between the protrusion amounts of the two contact points.