KR200161289Y1 - Control apparatus of electric folding type back mirror for a car - Google Patents

Abstract

A polarity switching switch 20 for supplying power by switching the polarity of the battery 10, a condenser 70 for generating and outputting an impulse from the power applied from the polarity switching switch 20, and the condenser described above. When the temperature rises due to an overcurrent generated when the triac 50 is turned on or off by an impulse applied from the 70 to the gate terminal and the overload driving motor 60 is overloaded, the resistance value becomes a certain temperature range. Is rapidly increased to block the energization of the forward / reverse drive motor 60 by cutting off the current flowing through the triac 50 when the PTC element 30 and the PTC element switch. Including the relay 40, the number of electrical circuit components is small, the structure is simple, and prevents the normal and reverse drive motor is burned out by abnormal load or overload due to various causes In addition, it is possible to stop the mirror in addition to the predetermined position stop position at the time of electric folding, and can also be used for the forward and reverse drive control circuits of other driving devices. It provides an electric folding rearview mirror control device for automobiles.

Description

Electric folding rearview mirror controller

The present invention relates to an electric folding rear view mirror control device for automobiles. More specifically, the number of electric circuit parts is small, the structure is simple, and the forward and backward driving motors are prevented from being burned out due to abnormal loads or overloads due to various causes. The mirror can be stopped in addition to the predetermined stop position at the time of folding, and can also be used for the forward and reverse drive control circuits of other driving devices, and can be miniaturized and small in size mechanically, and can reduce cost and improve productivity. The present invention relates to an electric folding rearview mirror control device for an automobile.

In driving a car, the rearview mirror plays a very important role in driving safety by allowing the driver to understand the situation around the car.

In the related art, the rearview mirror protrudes on the front side of the vehicle, and thus there is a high possibility of causing a contact accident by the rearview mirror when parking in a narrow space or when crossing a narrow road.

In order to solve this problem, the technique of the electric retractable rearview mirror that can control the standing mirror and the rear view mirror in the driver's seat is disclosed in Japanese Utility Model Application Publication No. 61-122134 (published: August 1, 1986). Has been disclosed. The configuration of the electric storage rearview mirror described in Japanese Utility Model Application Publication No. 61-122134 described above is an electric storage mirror control circuit which enables remote control of a set and storage of a mirror by driving a motor. A switch inserted between the battery and the motor to control the one-shot pulse signal for forward and reverse rotation of the motor; and a forward / reverse rotation corresponding to the one-shot pulse signal input by the operation of the switch, and at a mirror position required. It consists of a controller unit (switch) for stopping the motor and a relay circuit for driving the motor to the required mirror position, and the mirror set and storage are controlled by the input of the one-shot pulse signal by the switch operation. Characterized in that.

However, since the electric storage mirror control apparatus as described above is a method of generating a one-shot pulse signal by a manual switch, the circuit configuration is complicated, and there are many problems in that it is inconvenient for a user to use.

On the other hand, as another conventional technique related to a motor-driven rearview mirror for automobiles, Japanese Utility Model Application Publication No. Hei 6-32447 (announcement date: August 24, 1994) has been disclosed.

Hereinafter, with reference to the attached FIG. 1, the conventional electric storage rearview mirror control apparatus described in the above-mentioned Japanese Utility Model Application Publication No. Hei 6-32447 will be described.

1 is a configuration circuit diagram of a conventional motor-driven rear view mirror control device. As shown in FIG. 1, the structure of the conventional motorized rear view mirror control apparatus for automobiles is mounted so that the housing which supports a mirror can be driven to the stay provided in the outer side of a vehicle body, and is fixed to the said housing, and the said housing is fixed. The drive motor 13 to be rotated, the storage side switch which is turned on when the housing is in the standing position (expanded state) to just before the storing completion position (folded state) through the rotation of the housing, and the housing is standing up from the storing completion position. It consists of the rotation detection switch 12 which has a standing side switch turned on when it is just before a position, and the power polarity switching operation switch 11 provided in the vehicle interior.

The power polarity change control switch 11 has two movable contacts 11c and 11f which are interlocked and are switched to the normally open ends 11a and 11d or the normally closed ends 11b and 11e, respectively.

In addition, the two rotation detection switches 12 corresponding to the two drive motors 13 each comprise a circuit of the storage side switch by the storage operation contacts 12a and 12f and the fixed contact 12c. The movable contact 12b, 12f and the fixed contact 12d form a circuit of the standing side switch. The storage operation contact 12a of the rotation detection switch 12 is connected to the open end 11a in the switching operation switch 11, and the standing operation contact 12b is connected to the closed end 11e.

In this way, when a closed circuit in which current flows is formed by the open ends 11a and 11d of the switching operation switch 11 and the contacts 12a and 12c of the rotation detection switch 12, the forward and reverse driving is performed in the direction in which the closed circuit is formed. The motor 13 is operated and the forward and reverse drive motor 13 is stopped at the point where the containment movable contact 12a ends. At this time, two diodes, which are backflow prevention elements that control and control the current to flow in one direction, are connected in series at predetermined positions between the respective contacts.

However, the above-described conventional electric vehicle rearview mirror control apparatus for automobiles is very complicated in configuration of the control circuit, difficult to attach the rearview mirror assembly, consumes a lot of electric circuit components, and constitutes a contact closed circuit of a movable contact and a fixed contact. Because of this method, there are many noise concerns, which may cause the malfunction of the forward and reverse drive motors, and it is impossible to stop the rearview mirror outside the predetermined stop position, and the overload, physical and forced abnormal loads caused by various causes when the rearview mirror is operated. There is a problem that it is difficult to cope with the risk of burning the forward and reverse drive motor.

The object of the present invention is to solve the conventional problems as described above, and the number of electrical circuit components is simple, the structure is simple, preventing the forward and backward drive motor from being burned out by abnormal load or overload caused by various causes, rearview mirror It is possible to stop the rearview mirror in addition to a predetermined position stop position during operation, and furthermore, it is possible to miniaturize and reduce the capacity of the apparatus to provide an electric folding rearview mirror control apparatus for automobiles that can reduce cost and improve production.

1 is a configuration circuit diagram of a conventional motorized folding rearview mirror control device.

2A, 2B, and 2C of FIG. 2 are detailed circuit diagrams of an electric folding rearview mirror control apparatus for a vehicle according to an embodiment of the present invention.

3 is a partial plan cross-sectional view of a power folding rearview mirror for an automobile according to an embodiment of the present invention.

4 is a block diagram of a power folding rearview mirror for an automobile according to an embodiment of the present invention.

5 is an exploded perspective view of an electric folding rearview mirror for a vehicle according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

10: battery 20: polarity switching switch

30 PTC element 40 Relay

50: triac (semiconductor switch element) 60: forward and reverse drive motor

70 condenser 80 mirror assembly

As a means for achieving the above object, the constitution of the present invention is to provide a resistance value when the temperature rises due to an overcurrent generated when the mirror is physically and forcibly stopped by the stop bar during transmission, and the overcurrent driving motor is overloaded. Increases rapidly and connects the switching element of the PTC element and the relay in contact with the forward and backward drive motors in series, and connects the relay coil to the PTC element and the movable contact in parallel, between the polarity switching switch and the forward and reverse drive motors. It connects in series, and it consists of a structure which interrupts energization of a forward and reverse drive motor by the relay and semiconductor switch element which were linked with the switching operation of a PTC element.

In other words, this design raises the temperature due to the overcurrent generated when the rear view mirror stops due to physical, forced or overload by the stop bar, and the overload drive motor is overloaded. Relays and semiconductor switch elements in connection with the switching operation of PTC elements are connected by rapidly connecting PTC elements and relays that switch rapidly in parallel, and semiconductor switch elements connected in series between the PTC element and the relays and the reverse drive motor. It is characterized by blocking the energization of the forward and reverse drive motor.

According to the present invention, it is possible to block the forward and reverse drive motors by using a current detecting element, which is the conventional technology, to block the energization of the forward and reverse drive motors by the semiconductor switch element in conjunction with the switching operation in the PTC element which has rapidly increased in temperature and resistance. Compared to the above, the circuit components are less, and the switch operation is performed in an instant. Therefore, it is possible to reliably prevent burnout of the forward and reverse drive motors. Furthermore, the above configuration allows the forward and reverse drive motors to be physically or forcibly stopped by the rear mirror. Since it is possible to stop the driving of the rearview mirror driving force transmission mechanism, there is no backlash, and as a result, it is possible to stop at a predetermined stop position without a frame for fixing the rearview mirror moving body. Therefore, in the above configuration, even if an abnormal load occurs due to various causes in the rearview mirror during movement at a position other than the predetermined stop position, the forward / reverse drive motor stops instantaneously, thereby preventing burnout of the forward / reverse drive motor, and thus the forward / reverse drive motor. The driving force transmission mechanism and the control circuit can be miniaturized and miniaturized.

Hereinafter, the most preferred embodiments of the present invention will be described with reference to the accompanying drawings in order to be described in detail that can be easily carried out by those of ordinary skill in the art.

2A, 2B, and 2C of FIG. 2 are detailed circuit diagrams of an electric folding rearview mirror control apparatus for a vehicle according to an embodiment of the present invention.

The battery 10 shown in FIG. 2 is mounted on a motor vehicle as a normal DC power supply 12V. In addition, the polarity switching switch 20 is an interlocking three-position switching switch mounted on the driver's seat and having two movable contacts 201 and 202 for switching the polarity of the battery 10. The polarity switching switch 20 is connected to the first movable contactor 201 and the second movable contactor 202, the first common contact COM1, the second common contact COM2, and the battery 10. + Contacts A1 and A2 respectively connected to the positive electrode +, and-contacts B1 and B2 connected respectively to the negative electrode (-) of the battery 20, and the movable contacts 201 and 202 described above. ) Is always in contact with the common contacts COM1 and COM2.

The forward and reverse drive motor 60 is connected in series to the polarity switching switch 20. That is, the one-way terminal of the forward and reverse drive motor 60 is connected to the second common contact COM2 of the polarity switching switch 20, and the other one-way terminal is connected to one terminal of the triac 50, which is a semiconductor switch element.

The PTC (Positive Temperature Coefficient) device 30 using the resistance temperature characteristic has a switching characteristic in which the resistance value changes rapidly in a certain temperature region. The PTC element 30 is connected in series between the polarity switching switch 20 and the triac 50 which is a semiconductor switch element. That is, the one-way terminal of the PTC device 30 is connected to the movable contact C of the relay 40, and the terminal of the other direction is connected to the first common contact COM1 of the polarity switching switch 20.

The PTC element 30 is generated when the forward and backward driving motor 60 is overloaded by physically and forcibly stopping the forward and backward driving motor 60 by the mirror assembly 80, the stop bars 210 and 220 as moving objects. Due to the overcurrent, the internal temperature rises, and when the temperature reaches a certain temperature range, the internal resistance increases rapidly.

The relay 40 is connected to the movable contact 410 at all times, the movable contact C, the coil 401 for generating magnetic force, and the movable contact C when no potential is applied to the coil 401. And a contact B connected to the movable contact C when a potential is applied to the coil 401. The one-way terminal of the coil 401 of the relay 40 is connected between the first common contact COM1 of the polarity switching switch 20 and the PTC element 30, and the other one-way terminal of the coil 501 is It is connected between the contact B of the relay 40 and the triac 50 which is a semiconductor switch element. Moreover, the movable contact C of the relay 40 is connected to the PTC element 30, the B contact is connected to the triac 50 which is a semiconductor switch element, and the A contact is opened. If the potential difference does not occur in the coil 401 of the relay 40 and the coil 401 is not excited, the circuit is constituted by the movable contact C of the relay 40 and the B contact always attached to the coil 40. When the potential difference is generated in the 401 and the coil 401 is excited, a circuit is formed in which the movable contact C and the A contact of the relay 40 are connected to block the energization of the forward and reverse drive motor 60.

The triac 50, which is a semiconductor switch element, is connected in series between the relay 40 and the forward / reverse drive motor 60. That is, one direction terminal of the triac 50, which is a semiconductor switch element, is connected to the connection point of the contact point B of the relay 40 and the coil 401, and the other direction terminal is connected to the forward / reverse drive motor 60. The triac 50 as the semiconductor switch element can be used bipolarly.

One direction terminal of the capacitor 70 is connected between the first common contact COM1 of the polarity switching switch 20 and the PTC element 30, and the other direction terminal is a gate terminal of the triac 50 which is a semiconductor switch element. Is connected to. The capacitor 70 serves to supply an impulse to the gate terminal so that the triac 50, which is a semiconductor switch element, can be conducted.

By the above-described configuration, the operation of the motorized folding rearview mirror control apparatus according to an embodiment of the present invention is as follows.

When the driver operates the polarity switching switch 20 to connect the movable contacts 201 and 202 to the + contact A1 and the-contact B2, respectively, the trigger pulse in the capacitor 70 is the triac (the semiconductor switch element). The triac 50, which is a semiconductor switch element, is input to the gate terminal of 50 and is turned on. At this time, a potential difference is not generated in the coil 401 of the relay 40 due to the internal resistance of the forward and reverse drive motor 60 so that the contact B is always connected to the movable contact C of the relay 40. Through the circuit, the current flows in the battery 10 in the direction of the solid arrow as shown in FIG. 2B of FIG.

That is, the battery 10 → the polarity switching switch 20 → the PTC element 30 → the B contact connected to the common contact C of the relay 50 → the triac 50 which is a semiconductor switch element → the forward / reverse driving motor ( As the current flows to 60, the forward and reverse drive motor 60 is rotated forward.

When the forward and reverse drive motor 60 is rotated in this way, the mirror assembly 80 is folded in the neutral position (expanded state) as shown in FIG. 3 by the rotational force of the forward and reverse drive motor 60 (folded state). Rotate to).

When the mirror assembly 80 reaches the folded position at the predetermined stop position, an arc-shaped recess formed in the upper end of the shaft 110 fixed to the base 100 as shown in FIGS. 4 and 5. 120 and 130 have a rotation angle θ so that the mirror assembly 80 can be rotated by a predetermined angle when the mirror assembly 80 is rotated (operated in a folded or neutral state) by driving the forward / reverse drive motor 60. The mirror assembly at the time of rotation by electric drive by protruding the stop bar (210, 220) capable of a forced stop function after a certain angle rotation to the lower end of the frame 150 corresponding to the grooves (120, 130) on the arc ( The 80 stops, causing the overload driving motor 60 to become overloaded so that an overcurrent flows in the circuit.

When the internal temperature of the PTC element 30 rises due to such an overcurrent, the internal resistance of the PTC element 30 rapidly increases and a switching operation is performed. Accordingly, both ends of the coil 401 of the relay 40 are operated. When the potential difference is generated and the current is excited in the coil 401, the movable contact C of the relay 40 is instantaneously connected from the B contact to the A contact, and the triac 50, which is a semiconductor switch element, is turned off and is driven forward and backward. As the energization of the motor 60 is cut off and the rotation is stopped, the mirror assembly 80 is completely stopped at the folded position.

That is, all positions excited by the coil 401 of the relay 40 are lost by the turn-off operation of the triac 50, which is a semiconductor switch element, so that the A contact connected to the movable contact C of the relay 40 is Immediately reduced to contact B. The triac 50, which is a semiconductor switch element, maintains the turn-off state unless the trigger pulse is applied to the gate terminal by the capacitor 70, thereby blocking the energization of the forward and reverse driving motor 60.

Next, when the movable contactors 201 and 202 are connected to the negative contact B1 and the positive contact A2 by operating the polarity switching switch 20, the triac as the trigger pulse from the condenser 70 is a semiconductor switch element. The triac 50 is turned on by being input to the gate terminal of 50.

At this time, since the potential difference does not occur in the coil 401 of the relay 40 due to the internal resistance of the forward and reverse drive motor 60, the circuit is composed of the movable contact C and the B contact of the relay 40. As a result, the current in the battery 10 flows in the solid arrow direction as shown in FIG. 2C of FIG. 2. That is, the battery 10 → the polarity switching switch 20 → the forward / reverse drive motor 60 → the triac 50 → the B contact connected to the movable contact C of the relay 40 → the PTC element 30 → the polarity. As the current flows from the selector switch 20 to the battery 110, the forward and reverse drive motor 60 is reversed.

When the forward and reverse drive motor 60 is rotated in this way, the mirror assembly 80 is in the folded position (folded state) in the neutral position (expanded state) as shown in FIG. 3 by the rotational force of the forward and reverse drive motor 60. Rotate to).

When the mirror assembly 80 reaches the neutral position at the predetermined stop position, an arc-shaped recess formed in the upper end of the shaft 110 fixed to the base 100 as shown in FIGS. 4 and 5. 120 and 130 have a rotation angle θ so that the mirror assembly 80 can be rotated by a predetermined angle when the mirror assembly 80 is rotated (operated in a folded or neutral state) by driving the forward / reverse drive motor 60. The mirror assembly at the time of rotation by electric drive by protruding the stop bar (210, 220) capable of a forced stop function after a certain angle rotation to the lower end of the frame 150 corresponding to the grooves (120, 130) on the arc ( The 80 stops, causing the overload driving motor 60 to become overloaded so that an overcurrent flows in the circuit.

When the internal temperature of the PTC device 30 rises due to such an overcurrent, the internal resistance of the PTC device 30 is rapidly increased to perform a switching operation. Thus, the coil 401 of the relay 40 As the potential difference is generated at both ends and the current is excited in the coil 401, the movable contact C of the relay 40 is instantaneously connected from the B contact to the A contact, and the triac 50, which is a semiconductor switch element, is turned off and reversed. Since the energization of the drive motor 60 is cut off and the rotation is stopped, the mirror assembly 80 is completely stopped at the neutral position.

That is, since the excited current in the coil 401 of the relay 40 is lost by the turn-off operation of the triac 50, which is a semiconductor switch element, the A contact connected to the movable contact C of the relay 40 immediately becomes Reduced to the B contact. The triac 50, which is a semiconductor switch element, maintains the turn-off state unless the trigger pulse is applied to the gate terminal by the capacitor 70, thereby blocking the energization of the forward and reverse driving motor 60.

Therefore, according to the present invention, even when the mirror assembly 80 is physically or forcibly overloaded or abnormally loaded for various reasons in addition to a predetermined stop position (neutral position and folded position) during the rotation of the forward and reverse drive motor 60, The forward / reverse drive motor 60 is stopped by the instantaneous switching action of the triac 50, which is a semiconductor switch element interlocked with the device 30 and the relay 40, to ensure that the forward / reverse drive motor 60 is burned out. This can be prevented and damage to the mirror assembly 80 can be prevented.

In addition, according to the present invention, even when the mirror assembly 80 is reversely rotated immediately after the mirror assembly 80 is rotated from the neutral position to the folded position, the turn-off operation of the triac 50 as the semiconductor switch element is performed. Since the flow of current is interrupted and the internal temperature of the PTC element 30 is rapidly lowered to become the low-resistance state from the high resistance state, it is possible to drive the forward / reverse drive motor 60 so that the mirror assembly 80 can be reversed instantaneously. There is a number.

In addition, according to the present invention, since the switching action of the triac 50, which is a semiconductor switch element interlocked with the PRC element 30 and the relay 40, is performed in a moment due to the overload and abnormal load caused by various causes, (60) can be surely prevented from being burned, and the device can be miniaturized and small in size, thereby reducing costs and improving productivity.

As described above, in the embodiment of the present invention, the number of electrical circuit components is simple and the structure is simple, preventing the forward and backward drive motor from being burned out by abnormal load or overload due to various causes, and stopping the predetermined position at the time of electric folding. In addition to the position, the mirror can be stopped, it can be used in the forward and reverse drive control circuits of other driving devices, and can be miniaturized and small in size mechanically, and the electric folding type for automobiles has the effect of reducing cost and improving productivity. It is possible to provide a rearview mirror control device.

This effect of the present invention can be modified and used by those skilled in the art without departing from the gist of the present invention in the field of a rearview mirror driving device or a forward and reverse motor driving device for automobiles.

Claims (1)

A polarity switching switch 20 for supplying power by switching the polarity of the battery 10, and when the power is applied from the polarity switching switch 20, an impulse is generated and outputted to turn on the triac 50. Overcurrent generated when an overload is applied to the condenser 70, the forward and reverse drive motor 60 driven by the power applied through the triac 50, and the forward and reverse drive motor 60. When the temperature rises to a certain temperature range, the resistance increases rapidly and the PTC element 30 which switches and the relay 40 which is switched off when the PTC element 30 switches, and the relay ( When the 40 is switched off the automatic characterized in that it comprises a triac 50 to prevent the discharge of the battery 10 by completely blocking the passage of the current flowing through the forward and reverse drive motor 60 Power Mirrors control apparatus for an.