JPH06102421B2 - Retractable door mirrors - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a retractable door mirror in which a mirror body is erected so as to be erected and stored in a mounting base that is mounted on left and right doors of a vehicle.

[Prior Art] Generally, the left and right door mirrors of an automobile are greatly extended laterally from the vehicle body as compared with a fender mirror, so that when entering a garage or a multi-level parking lot, for example, the door mirrors are an obstacle and cannot be smoothly entered. It may damage the door mirrors or equipment in the garage or multi-storey car park. Therefore, if necessary, the mirror body can be laid down (retracted) from its standing position to reduce the amount of overhang. Various inversion type door mirrors have been developed.

[Problems to be Solved by the Invention] However, since the conventional body of this type has to be operated by directly holding the mirror body with both hands when the left and right mirror bodies are laid down or raised. I had to go out of the car or open the window each time. Of course, the operation of the driver's side door mirror is also troublesome, but especially when there is no passenger other than the driver, the operation of the passenger side door mirror is extremely troublesome, especially on a rainy or snowy day or in the cold season. Is inconvenient to handle.

Therefore, it has been studied from the standpoint of making it possible to electrically operate the standing and storing of the left and right mirror bodies.
Such a conventional type has a minimum of two motors for activating and retracting the mirror body of the left door, and a minimum of two motors for activating and retracting the mirror body of the right door. Since at least four relays are required, there is a problem that the cost is high, and a large space is required for installing the relays, and the door mirror becomes large.

An object of the present invention is to provide a foldable door mirror that can electrically operate the standing and storing of the left and right mirror bodies, is low in cost, and can be made compact.

[Means for Solving the Problems] In order to achieve the above object, the present invention incorporates a mirror body storage priority circuit and an attitude holding circuit in a relay sequence.

That is, the present invention relates to a retractable door mirror in which mirror bodies are mounted so that they can be erected / stored on mounting bases mounted on the left and right doors of a vehicle respectively; an automatic reset type push button switch provided in the vehicle. An electric drive member for raising and retracting the mirror body; a plurality of limit switches for detecting an upright or retracted position of the mirror body; a limit switch depending on the upright or retracted position of the mirror body when the pushbutton switch is operated Standing up and storage relays that operate independently depending on the open / closed state of the group; circuit for holding the relays themselves when the standing up or storage relays are activated; the push button switch, standing up and storage relays, and limits The electric drive to rotate the mirror body in the standing or storing direction in cooperation with the switch. A drive circuit for driving the wood; and a storage priority circuit and posture holding circuit. When the push button switch is operated, when the left and right mirror bodies are both in the retracted position, the retracting priority circuit activates the retracting relay first, and then the standing position detection limit switch is open. , When the standing relay is activated and the storage relay is demagnetized, the left and right mirror bodies are rotated toward the standing position, and if at least one of the left and right mirror bodies is not in the stored position, first the storage relay Is activated, the standing relay is not activated in the state of the limit switch at that time, the storage relay continues to operate, and the mirror body that is not in the storage position is rotated toward the storage position.
The attitude holding circuit operates the stand-up relay by the action of the storage priority circuit until the next push button switch is operated when both the left and right mirror bodies are rotated by the operation of the push button switch and both reach the storage position. Switch for interlocking with the push-button switch is connected in series with the standing-up relay or in series with the base, emitter, or collector of the transistor for driving the standing-up relay to prevent the holding of the stored position. .

[Operation] When the push button switch of the automatic reset type provided in the passenger compartment is operated, the mirror body is erected and stored by the driving force of the electric drive member.

If both the left and right mirror bodies are in the retracted position when the pushbutton switch is operated, the retracting relay operates first, and then the standing up relay is opened because the limit switch for detecting the standing position is open at that time. When activated, the storage relay is demagnetized and the left and right mirror bodies are rotated toward the upright position. If at least one of the left and right mirror bodies is not in the retracted position when the pushbutton switch is operated,
First, the storage relay operates, and the storage relay continues to operate without operating the standing relay in the state of the limit switch at that time, and the mirror body not in the storage position is preferentially rotated toward the storage position. .

Further, when the left and right mirror bodies are rotated by the operation of the push button switch and both reach the storage position, the posture holding circuit prevents the operation of the stand-up relay until the next push button switch is operated. Holds the mirror body storage position.

[Embodiment] An embodiment of the present invention shown in the drawings will be described below.

FIG. 1 shows an embodiment of the present invention, in which the shafts 4L and 4R are attached to the mounting bases 3L and 3R mounted on the left and right doors 2L and 2R of the automobile 1.
Mirror bodies 5L and 5R are rotatably mounted around shafts 4L and 4R via. The mounting bases 3L, 3R or the mirror bodies 5L, 5R have a reversible motor M that is an electric drive member.
L and MR are provided, and the gear 6 by rotation of reversible motors ML and MR
Via L, 6R and gears 7L, 7R, the mirror bodies 5L, 5R rotate between an upright position N shown by a solid line and a fall position or storage position B which is tilted to the rear of the vehicle as shown by a chain line. Has become.

Limit switches LS for mounting bases 3L and 3R and for detecting mirror bodies 5L and 5R when they are in the upright position N
LN and LSRN and limit switches LSLB and LSRB for detecting the mirror bodies 5L and 5R when they are in the storage position B are provided. In the above description, the letter L means the left side, and the letter R means the right side. Although not shown in FIG. 1, a single push button switch (indicated by BS in FIGS. 2 to 6) is provided in the passenger compartment of the automobile 1 so as to be operable from the driver's seat. By operating this push button switch, both the left and right mirror bodies 5L and 5R stand up,
A drive circuit (shown as DC in FIGS. 2-6) for storing is provided.

<First Embodiment> FIG. 2 shows a first embodiment of the drive circuit DC, in which the push button switch BS is of an automatic resetting type which closes between the contact points while the push button switch BS is being pressed. The limit switches LSLN and LSRN detect this only when the mirror bodies 5L and 5R are in the upright position N to open the contacts, and otherwise always close the contacts. Limit switches LSLB and LSRB detect this only when mirror bodies 5L and 5R are in storage position B.
Switch to NO (normally open) contact side, otherwise NC
(Normally closed) The contact is normally closed.

The reversible motors ML and MR move the mirror bodies 5L and 5R from the standing position N to the storage position B when a current flows from the terminal N to the terminal B, and when the current flows from the terminal B to the terminal N, the mirror bodies 5L. , 5R are moved from the storage position B to the standing position N. XB is a single pole mirror body storage relay in which the contact xB closes the NO circuit only when it is excited and the NC circuit is always closed in other cases. XN is a single-pole mirror-body stand-up relay in which the contact xN closes the NO circuit only when it is excited, and the NC circuit always closes in other cases. Tr is a transistor, SW is a switch that opens and closes similarly in conjunction with the pushbutton switch BS, r ₁ and r ₂ are resistors, and D _{1 to} D ₈ are diodes. D ₉ , D
_{Although 10} is a diode for absorbing surge voltage, it can be omitted.

This drive circuit DC operates as follows.

First, when the pushbutton switch BS is pressed while the mirror bodies 5L and 5R are in the standing position N (or between the standing position N and the storage position B), the storage relay XB is excited via the NC circuit of the contact xN. Therefore, a current flows through the NO circuit of the contact xB to the NC contacts of the millimeter switches LSLB and LSRB and the diodes D ₇ and R ₈ , and the relay XB is self-held. On the other hand, the reversible motors ML and MR are connected via diodes D ₁ and D ₂ (limit switches LSLN and LSRN when the mirror bodies 5L and 5R are between the standing position N and the storage position B) and the NC circuit of the contact xN. Current flows from terminal N to terminal B, which causes the mirror body 5
L and 5R are rotated toward the storage position B.

When the mirror bodies 5L and 5R reach the storage position B, the limit switches LSLB and LSRB are switched to the NO contact side, so the reversible motors ML and MR become non-conductive and the mirror bodies 5L and 5R stop moving and the appropriate machine The relay XB is demagnetized while it is held in the storage position B by a mechanical means.

In this process, when either the left or right mirror body (for example, 5L) reaches the storage position B first, the limit switch LSLB is switched to the NO contact side, and the mirror body 5L is stopped at the storage position B and held. However, since the relay XB continues to be self-held through the diode D ₆ , the reversible motor MR continues to be energized and the mirror body 5R is rotated to the storage position B. That is, the storage is rotated preferentially. Mirror body
The same applies when the 5R first reaches the storage position B.

The storage priority circuit is composed of the above limit switch, relay and relay contact, and when the push button switch BS is operated,
If both left and right mirror bodies are in the storage position,
First, the storage relay XB is activated, and then the standing position detection limit switch is open.
When XN is activated and storage relay XB is demagnetized, the left and right mirror bodies are rotated toward the upright position.If at least one of the left and right mirror bodies is not in the storage position, the storage relay is activated first. However, the storage relay XB continues to operate without operating the stand-up relay XN in the state of the limit switch at that time, and the mirror body not in the storage position is rotated toward the storage position to give priority to storage. .

When both the mirror bodies 5L and 5R reach the storage position B, the reversible motor ML or MR, which has been continuously energized until then, has a limit switch LSLB or LSRB due to its inertia.
Does not stop instantly even if it leaves the NC contact, and an electromotive force is generated by the rotation to generate a positive potential at the terminal N, which delays the demagnetization timing of the relay XB. As a result, when the limit switches LSLR and LSRB are switched to the NO contact side, the transistor is still connected via the contact xB that still closes the NO circuit.
The bias voltage necessary for conduction is applied to the base and collector of the Tr.

At this time, if the transistor Tr conducts and the standing-up relay XN is excited, the reversible motor ML, as described later,
Current flows from terminal B to terminal N in MR. Mirror body 5L, 5R
Will rotate again toward the upright position N, but in conjunction with the push button switch BS, the push button switch BS
Due to the action of the switch SW that closes when the switch is released, the transistor Tr is not conducted and the relay XN is not excited, and as a result, both the mirror bodies 5L and 5R are held in the storage position B.

In this way, the switch SW, the transistor Tr, the resistor r ₂ , and the relay XN constitute an attitude holding circuit that holds the other relay XN in the non-energized state when the demagnetization timing of the one relay XB is delayed.

When the push button switch BS is operated to rotate the left and right mirror bodies and both reach the retracted position, this posture holding circuit operates by the storage priority circuit until the next push button switch is operated. It prevents the operation of XN and keeps the storage position, in series with the standing relay,
Alternatively, a switch SW interlocking with the push button switch BS is connected in series with the base, emitter or collector of the transistor Tr that drives the standing-up relay.

Next, when the mirror bodies 5L and 5R are in the storage position B,
When push button switch BS is pressed, relay XB for storage contacts.
It is excited via the NC circuit of xN, so that the bias voltage required for conduction is applied to the base and collector of the transistor Tr via the NO circuit of the contact xB and the NO contact of the limit switches LSLB, LSRB. At this time, since the switch SW is closed in conjunction with the pushbutton switch BS, the transistor Tr becomes conductive and the standing-up relay XN is excited, so that the limit switches LSLN, LSRN and the diode D are connected via the NO circuit of the contact xN. ₅ , current flows through D ₆ and relay XN is held by itself. On the other hand, the reversible motors ML and MR cause current to flow from the terminal B to the terminal N through the NC circuit of the contacts xB of the relay XB which is demagnetized by switching the contacts xN of the diodes D ₃ and D ₄ and the relay XN to the NO side. And the mirror bodies 5L and 5R are rotated toward the standing position N.

When the mirror bodies 5L and 5R reach the upright position N, the contacts of the limit switches LSLN and LSRN are closed, so that the reversible motors ML and MR are de-energized and the mirror bodies 5L and 5R stop rotating and appropriate mechanical operations are performed. Is held in the standing position N by means,
On the other hand, the storage relay XN is demagnetized. In this process, one of the mirror bodies (for example, 5L) comes to the standing position N first.
If the limit switch LSLN is reached, the contact of the limit switch LSLN is opened and the mirror body 5L is stopped and held at the upright position N.
Since the standing-up relay XN continues to be self-held through the diode D ₆ , the reversible motor MR continues to be energized and the mirror body
5R is rotated to the standing position N, then stopped and held.
The same applies when the mirror body 5R reaches the storage position B first.

In addition, either one of the mirror bodies 5L and 5R (for example, 5
L) only is in storage position B, pushbutton switch BS
When is pressed, the storage relay XB is excited via the NC circuit of the contact xN, so that current flows through the NC contact of the limit switch LSRB and the diode D ₈ via the NO circuit of the contact xB, and the relay XB self-holds. To be done. On the other hand, the reversible motor MR is the diode D ₂ (when the mirror body 5R is in the upright position N) or the limit switch LSRN (when the mirror body 5R is between the upright position N and the storage position B), and the NC of the contact xN.
A current flows from the terminal N to the terminal B through the circuit, whereby the mirror body 5R is rotated toward the storage position B. When the mirror body 5R reaches the storage position B, the limit switch LSRB switches to the NO contact side and the mirror body 5R stops at the storage position B, and at this time, the demagnetization timing of the relay XB is delayed due to the inertia of the reversible motor MR. Even if the push button switch BS is released when the push button switch BS is released, the transistor Tr does not conduct and the relay XN is not excited, and as a result, the mirror body 5R falls to the fall position B. Held in. The same applies when only the mirror body 5R is in the storage position B.

The switch SW interlocking with the push-button switch BS is not limited to the position shown in the drawing, but can be arranged in any position A or B in the drawing.

<Second Embodiment> FIG. 3 shows a second embodiment of the drive circuit DC. This drive circuit
DC is the one in which the standing-up relay XN in FIG. 2 was connected to the emitter of the transistor Tr, whereas it was connected to the collector. Accordingly, diodes D ₉ , D ₁₀ , D ₁₁ , and D ₁₂ are provided in the self-holding circuit of the relay XN, and the switch interlocking with the pushbutton switch BS is located at any of A, B, C, and D positions in the figure. The other parts are the same as those in FIG. If the operation of the relay NX is unstable in the case of the emitter connection as shown in FIG. 2, the collector connection may be made as shown in FIG.

<Third Embodiment> FIG. 4 shows a third embodiment of the drive circuit DC. The driving circuit DC is obtained in place of the transistor Tr of the second view using the constant current diode CRD 1, CRD2 and the diode D _9. The storage relay XN is excited only when a current flows through both the constant current diodes CRD1 and CRD2, and the switch interlocking with the pushbutton switch BS is arranged at either A or B position in the figure. Others are the same as those in FIG. Current value required to excite relay XN
If I _XN , the current value (rated current) I that can be passed by the constant current diodes CRD1 and CRD2 is
It may be set so that <I _XN ≤ 2I is satisfied.

<Fourth Embodiment> FIG. 5 shows a fourth embodiment of the drive circuit DC. This drive circuit DC uses resistors r ₁ , r ₂ and a diode D ₉ in place of the transistor Tr of FIG. The storage relay XN is excited only when a current flows through both the resistors r ₁ and r ₂ , and a switch interlocking with the push button switch BS is arranged at either position A or B in the figure. Others are the same as those in FIG. If the voltage value required to excite the relay XN is V _XN and the winding resistance of the relay XN is r _XN , the resistance value r (r = r ₁ = r ₂ ) of the resistors r ₁ and r ₂ is Should be set to satisfy.

<Fifth Embodiment> FIG. 6 shows a fifth embodiment of the drive circuit DC. The drive circuit DC is a three-terminal limit switch LSLB, LSRB in FIG.
Instead of using the two-terminal limit switches LSLB and LSRB, it has a feature that the configuration is simpler and the design freedom is higher than that of the one shown in FIG.
Others are the same as in FIG.

In FIG. 6, it operates as follows.

That is, when at least one of the mirror bodies 5L and 5R (for example, 5R) is in the standing position N or between the standing position N and the storage position B, when the push button switch BS is pressed, the storage relay XB causes the NC of the contact xN to contact. Excited through the circuit. Therefore, the contact xB NO circuit, limit switch LSRB (or LSL
Current flows to diode D ₉ through B) and diode D ₇ (or D ₈ ). At the same time, diode D ₇ (or
Cathode of D ₆₎ becomes a positive voltage, standing relay XN the transistor Tr is not turned from the positive voltage is applied to the base of the PNP transistor Tr via the switch SW which is closed in conjunction with the push button switch BS is Not excited,
As a result, the relay XB is self-held via the NC circuit of the contact xN, and thereafter, the relay XB operates in the same manner as in FIG.

When the pushbutton switch BS is pressed when the mirror bodies 5L and 5R are both in the storage position B, the relay XB turns to the contact XN.
It is excited via the NC circuit, so that a positive voltage is applied to the emitter of the transistor Tr via the NO circuit of the contact xB. Since the limit switches LSLB and LSRB are both open, the cathode side of the diodes D ₇ and D ₈ does not become a positive voltage, and the transistor Tr of the transistor Tr is closed via the switch SW that is closed in conjunction with the resistor r ₁ and the pushbutton switch BS. Ground potential is applied to the base. As a result, the transistor Tr becomes conductive and the stand-up relay XN is excited, the contact xN switches from the NC side to the NO side and the relay XB is demagnetized, and the relay XN is the NO circuit of the contact xN, limit switches LSLN, LSRN. And self-held via diodes D ₅ and D ₆ and then second
It operates similarly to the figure.

[Effects of the Invention] Since the present invention is configured as described above, it is possible to electrically operate the standing and storing of the left and right mirror bodies only by operating the push button switch, and therefore, for example, the vehicle is stored in a garage or a multilevel parking lot. When storing the left and right door mirrors in advance, and when raising the door mirrors after leaving the garage, it is not necessary to go out of the vehicle or open the window to reach out each time, especially on rainy or snowy days or cold seasons. It is convenient to handle. Moreover, since it is only necessary to provide a single-operation member, that is, a push-button switch of an automatic return type in the vehicle compartment, there is an excellent effect that the installation space of the operation member is minimized. In particular, according to the present invention, the mirror body can be preferentially rotated to the storage side by operating the pushbutton switch when the left and right mirror bodies are not in the storage position, and the storage operation of the mirror body can be performed safely and securely. Can be one.

Further, since the drive circuit is provided with the posture holding circuit, when the demagnetizing timing of the storage relay is delayed at the storage end of the mirror body, the standing relay is kept in the non-energized state to hold the posture of the mirror body. be able to.

[Brief description of drawings]

FIG. 1 is a plan view of an essential part showing an embodiment of the present invention, and FIG.
FIG. 3 is a sequence diagram showing a first embodiment of the drive circuit,
FIG. 6 is a sequence diagram showing different embodiments of the drive circuit. 1 …… Car, 2L, 2R …… Door, 3L, 3R …… Mounting base, 4L, 4R …… Axis, 5L, 5R …… Mirror body, 6L, 6R,
7L, 7R ... Gear, ML, MR ... Reversible motor, BS ... Pushbutton switch, LSLN, LSRN ... Standing position detection limit switch, LSLB, LSRB ... Storing detection limit switch, XN ... Standing Relay, XB ... Storage relay, xB, xN
...... Relay contact, DC ...... Driving circuit, D _{1 to} D ₁₃ ...... Diode, Tr ...... Transistor, SW ...... Switch, r ₁ , r ₂ ...
… Resistors, CRD1, CRD2… Constant current diodes.

Claims (2)

[Claims] Claims: 1. A retractable door mirror in which a mirror body is attached to a mounting base attached to the left and right doors of a vehicle such that the mirror body can be erected and stored, and an automatic resetting pushbutton switch provided in the vehicle. An electric drive member for raising and retracting the mirror body, a plurality of limit switches for detecting the raising or storing position of the mirror body, and a limit switch depending on the raising or storing position of the mirror body when the pushbutton switch is operated. Standing and storage relays that operate independently depending on the open / closed state of the group, a circuit that self-holds the relays when the standing or storage relays are activated, the pushbutton switch, the standing and storage relays, and the limit The electric drive unit for cooperating with the switch to rotate the mirror body in the standing or storing direction. If both the left and right mirror bodies are in the retracted position during operation of the drive circuit that drives the pushbutton switch and the push button switch, the retract relay first operates, and then the open position detection limit switch open state. Therefore, if the stand-up relay is activated and the storage relay is demagnetized, the left and right mirror bodies are rotated toward the stand-up position, and if at least one of the left and right mirror bodies is not in the storage position, first store it. Storage relay operates, the storage relay continues to operate without operating the standing relay in the state of the limit switch at that time, and the storage priority circuit that rotates the mirror body that is not in the storage position toward the storage position, When the left and right mirror bodies are rotated by the operation of the push button switch and both reach the storage position, the storage priority circuit operates until the next push button switch is operated. Interlock with the push-button switch in series with the stand-up relay or in series with the base, emitter or collector of the transistor that drives the stand-up relay in order to prevent the stand-up relay from operating and hold the retracted position. A retractable door mirror, comprising: an attitude holding circuit that is connected to a switch. 2. The foldable door mirror according to claim 1, wherein the electric drive member is a reversible motor.