JPH0356206B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention provides a mirror body that stands up on a mounting base that is attached to the left and right doors of a vehicle.
This invention relates to a drive circuit for a foldable door mirror that is assembled so that it can be folded down.

[Prior Art] In general, the left and right side door mirrors of a car protrude more outward from the car body than the fender mirrors, so when entering a garage or multi-story parking lot, for example, the door mirrors get in the way and make it difficult to enter the car smoothly. , damage to door mirrors or equipment in garages and multi-storey parking lots. Therefore, we have developed a foldable door mirror that can lower the mirror body from its upright position to reduce the amount of protrusion if necessary. have been developed in various ways.

[Problems to be Solved by the Invention] However, in conventional devices of this type, the left and right mirror bodies must be held and operated directly with each hand when folding them down or standing them up. It is necessary to get out of the car or open the window each time, and it is of course troublesome to operate the driver's side door mirror, but it is especially difficult to operate the passenger side door mirror when there are no passengers other than the driver. However, there were problems such as being extremely troublesome and inconvenient to handle, especially on rainy or snowy days or during cold seasons. For this reason, efforts have been made to make it possible to raise and lower the left and right mirror bodies electrically. For example, when both the left and right mirror bodies are upright, only one of them can be laid down, or when both the left and right mirror bodies are laid down, only one of them can be laid down. In particular, there were problems in that it was completely impossible to simultaneously perform an electric operation to raise one mirror body and an electric operation to lower the other mirror body.

This invention solves the above-mentioned problems of the conventional ones, and enables the raising and lowering of the left and right door mirrors to be electrically operated.Furthermore, the left and right mirror bodies can be raised and lowered independently by electrical operation. The object of the present invention is to provide a drive circuit for a folding door mirror.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides that the left and right door mirrors are assembled to a base provided on the outer surface of the vehicle so that they can be raised and lowered, and that the left and right door mirrors are installed in the mirror body of each door mirror. The output gear of the provided reversible motor is meshed with a gear fixed to a shaft mounted on a mounting base, and the reversible motor is driven by operating an automatic return type push button switch provided in the vehicle interior to independently operate the left and right door mirrors. In a drive circuit for a door mirror configured to stand up or fall down, a plurality of limit switches are respectively attached to the base mounting portions of the left and right mirror bodies, and detect the upright or down position of each mirror body when the mirror body is in the upright or down position. and the limit switch for detecting the standing or lying position are connected in series, respectively,
The present invention is characterized in that it includes a relay for raising and lowering that opens and closes a circuit of the reversible motor in response to a detection signal from the limit switch.

[Function] When the left and right door mirrors, or either one of them, is in the upright position or between the upright position and the folded position, each door mirror can be operated independently by pressing the dedicated automatic return push button switch for the left and right door mirrors. Rotate to the prone position. Furthermore, when the door mirrors are in the folded position, pressing the push button switch allows each door mirror to be returned to the upright position.

[Example] Hereinafter, an example of the present invention shown in the drawings will be described.

FIG. 1 shows an embodiment of the present invention, in which an automobile 1
The mirror bodies 5L, 5R are attached to the mounting bases 3L, 3R attached to the left and right doors 2L, 2R via shafts 4L, 4R so as to be rotatable around the shafts 4L, 4R. Alternatively, the mirror bodies 5L, 5R are provided with reversible motors ML, MR, and the rotation of the reversible motors ML, MR moves the mirror bodies 5L, 5R to the upright position N shown by the solid line via the gears 6L, 6R and the gears 7L, 7R. ,
It is designed to move between a lodging position (rearward position) B indicated by a chain line. The mounting bases 3L, 3R are also provided with limit switches LSL, which detect when the mirror bodies 5L, 5R are in the upright position N.
N, LSRN, and a limit switch that detects when the mirror bodies 5L and 5R are in the folded position B.
LSLB and LSRB are provided. In the above description, the letter L refers to the left side, and the letter R refers to the right side. In the cabin of the automobile 1, as shown in Fig. 2, there is a push button switch BSL dedicated to the mirror body 5L of the left door 2L.
A push button switch BSR dedicated to the mirror body 5R of the right door 2R is housed in a common case 8 and can be operated from the driver's seat. A drive circuit (indicated by DCL in Figures 3 and 4) raises and lowers the body 5L, and a drive circuit (3rd,
It is shown by DCR in Figure 4. ) is provided.

FIG. 3a shows an embodiment of the drive circuit DCL,
Further, FIG. 3b shows an embodiment of the drive circuit DCR,
Both drive circuits DCL and DCR are completely similar except for L and R, so only the drive circuit DCL will be explained below, and the drive circuit
An explanation of DCR will be omitted. In Figure 3a, pushbutton switches BSL ₁ and BSL ₂
is an automatic return type that closes the circuit between the contacts only while the push button switch BSL shown in Fig. 2 is pressed, and the limit switch LSLN is a mirror body 5L.
The limit switch LSLB detects this and opens the contacts only when the mirror body 5L is in the upright position N, and keeps the contacts closed at all other times. When the current is detected, the contacts are opened, and otherwise the contacts are always closed.When the current flows from the terminal N to the terminal B, the reversible motor ML closes the mirror body 5.
The mirror body 5L is moved from the upright position N to the down position B, and when current flows from the terminal B to the terminal N, the mirror body 5L is moved from the down position B to the upright position N. XLB is a single-pole relay that contacts xL and B close the NO circuit only when it is energized, and always closes the NC circuit otherwise, and XLN has contacts only when it is energized.
xLN closes the NO circuit, and the rest are single-pole relays that keep the NC circuit closed at all times, TrL is a transistor, rL is a resistor, and DL ₁ to _{DL 4} are diodes.

This drive circuit DCL operates as follows.
First, when the mirror body 5L is in the upright position N (or between the upright position N and the collapsed position B), when pushbutton switch BSL (i.e. BSL ₁ , BSL ₂ ) is pressed, relay XLB switches to the NC circuit of contact xLN. is energized through the contact xLB, so that current flows through the NO circuit of the contact xLB to the limit switch LSLB and the diode DL ₁ , making the relay XLB self-holding, while
Reversible motor ML has diode DL ₂ (mirror body 5
When L is between the upright position N and the collapsed position B, limit switch LSLN) and contact xLN NC
A current flows from the terminal N to the terminal B via the circuit, and the mirror body 5L is thereby moved toward the collapsed position B. When the mirror body 5L reaches the laid down position B, the contact of the limit switch LSLB is opened, so the reversible motor ML is de-energized, and the mirror body 5L stops moving and is held at the laid down position B by appropriate mechanical means. Relay XLB is demagnetized. When the mirror body 5L reaches the folded position B, the reversible motor ML, which had been energized until then, does not stop instantly even if the contact of the limit switch LSLB is opened due to its inertia, and generates an electromotive force by rotation. This causes a positive potential at terminal N, which delays the demagnetization timing of relay XLB, which causes limit switch LSLB to
The bias voltage necessary for conduction is applied to the emitter of the transistor TrL through the contact xLB which still closes the NO circuit even if the contact of When the base potential of transistor TrL suddenly drops to the potential required for conduction, transistor TrL becomes conductive and relay XLN is excited, and as a result, current flows from terminal B to terminal N in reversible motor ML as described later. The mirror body 5L will move towards the upright position again,
The base of the transistor TrL and the terminal N of the reversible motor ML are cut off by the action of the pushbutton switch _BSL2 , which opens when the pushbutton switch BSL is released, and no base current flows, so the transistor TrL does not conduct and the relay XLN is not excited, and as a result, the mirror body 5L is held in the laid down position B.

Next, when the mirror body 5L is in the laid down position B, the push button switches BSL (i.e. BSL ₁ ,
BSL ₂ ) is pressed, relay XLB connects the NC of contact xLN.
is energized through the circuit and therefore the NO of contact xLB
The bias voltage necessary for conduction is applied to the emitter of transistor TrL through the circuit, while the contact
NC circuit of contact xLN before xLB switches to NO circuit,
The base potential of the transistor TrL, which is almost at ground potential through the limit switch LSLN, the motor ML, and the pressed and closed pushbutton switch BSL ₂ , is because the contact of the limit switch LSLB is open even though the contact xLB switches to the NO circuit. The transistor TrL is kept at the low potential required for conduction.
conduction relay XLN is energized, so the contacts
xLN switches to NO _circuit and _relay and terminal B via the NC circuit of contact xLB of demagnetized relay XLB.
A current flows from the terminal N to the terminal N, and the mirror body 5L is thereby moved toward the upright position N. When the mirror body 5L reaches the upright position N, the contact of the limit switch LSLN is opened, so the reversible motor ML is de-energized, and the mirror body 5L stops moving and is held at the upright position N by appropriate mechanical means. Relay XLN is demagnetized.

FIG. 4a shows another embodiment of the drive circuit DCL,
Further, FIG. 4b shows another embodiment of the drive circuit DCR, and since both drive circuits DCL and DCR are completely similar except for L and R, the drive circuits DCL and DCR are completely similar. Only DCL is explained below,
A description of the drive circuit DCR will be omitted. In Figure 4a, the pushbutton switch
BSL is the push button switch BSL shown in Figure 2.
It is an automatic return type that closes the circuit between the contacts only while it is pressed, and is a limit switch LSLN.
The limit switch LSLB detects this and opens the contacts only when the mirror body 5L is in the upright position N, and otherwise keeps the contacts closed at all times, and the limit switch LSLB has the mirror body 5L in the collapsed position B It detects this and switches to the NO contact side only when
Otherwise, the NC contact is always closed, and the reversible motor ML moves the mirror body 5L from the upright position N to the collapsed position B when current flows from the terminal N to the terminal B, and also from the terminal B. When current flows through the terminal N, the mirror body 5L is moved from the collapsed position B to the upright position N. XLB is a contact only when energized
xLB is a single-pole relay that closes the NO circuit, otherwise the NC circuit is always closed, and XLN is a single-pole relay whose contact xLN closes the NO circuit only when it is energized.
Other than that, it is a single-pole relay that keeps the NC circuit closed at all times, and DL ₁ and DL ₂ are diodes.

This drive circuit DCL operates as follows.

First, when the mirror body 5L is in the upright position N (or between the upright position N and the collapsed position B), when pushbutton switch BSL is pressed, relay XLB is energized via the NC circuit of contact xLN, so that the contact Current flows through the NO circuit of xLB to diode DL ₁ and the NC contact of limit switch LSLB to maintain relay XLB, while the reversible motor ML flows through the NO circuit of contact xLB and the NC contact of contact xLN.
A current flows from the terminal N to the terminal B via the NC circuit, and the mirror body 5L is thereby moved toward the collapsed position B. Here, when the mirror body 5L moves away from the standing position N from the beginning or due to movement, the contact of the limit switch LSLN closes.
Due to the direction of diode DL ₂ , from the COM terminal of contact xLB to relay XLN and limit switch
Since no current can flow through LSLN to the COM terminal of contact xLN, relay XLN cannot be energized, so only relay XLB maintains the energized state to stably move mirror body 5L. When mirror body 5L reaches the collapsed position B, limit switch LSLB switches to the NO contact side, so relay XLB is demagnetized and contact xLB is switched to the NO contact side.
The NO circuit is opened, the reversible motor ML is de-energized, the mirror body 5L stops moving, and is held in the collapsed position B by appropriate mechanical means.

Next, when the mirror body 5L is in the folded position B, press the push button switch BSL, and the relay
XLN is energized via the NO circuit of the limit switch LSLB, the NC circuit of the limit switch LSLN and the contact xLB, and therefore the diode DL ₂ and the limit switch are energized via the NO circuit of the contact xLN.
Current flows to LSLN and relay XLN is self-held, while current flows from terminal B to terminal N of reversible motor ML via the NO circuit of contact xLN and the NC circuit of contact xLB, which causes mirror body 5L
is moved toward the standing position N. Here, when the mirror body 5L moves away from the collapsed position B, the limit switch LSLB switches to the NC contact side, but because of the direction of the diode DL ₁ , the contact xLN
Current cannot flow from the COM terminal to the COM terminal of contact xLB through relay XLB and limit switch LSLB, so relay XLB cannot be energized, so only relay XLN remains energized and mirror body 5L move stably. When mirror body 5L reaches the standing position N, the contact of limit switch LSLN is opened, so relay XLN is demagnetized and contact xLN is closed.
The NO circuit is opened, the reversible motor ML is de-energized, the mirror body 5L stops moving, and is held in the upright position N by appropriate mechanical means.

[Effects of the Invention] Since the present invention is configured as described above, it is possible to electrically operate the left and right door mirrors to raise and lower them, and moreover, the left and right mirror bodies can be moved independently by operating the automatic return type push button switch. Therefore, for example, you can lower the left and right door mirrors before entering a garage or multi-storey parking lot, and when you raise the door mirrors after leaving the garage, you can step out of the vehicle or open the window each time. It is convenient to handle, especially on rainy or snowy days or during cold seasons, as there is no need to do anything with it.
Also, for example, when both the left and right mirror bodies are upright, only one of them can be laid down, or when both the left and right mirror bodies are laid down, only one of them can be made to stand up, or even It is possible to perform electric operation to raise one mirror body and electric operation to lower the other mirror body at the same time.
It has excellent effects such as being able to meet all kinds of requests.

[Brief explanation of drawings]

Fig. 1 is a plan view of essential parts showing one embodiment of the present invention, Fig. 2 is a perspective view of a case of a push button switch, Figs. FIG. 3 is a sequence diagram showing an example. 1...Car, 2L, 2R...Door, 3L, 3R...
Mounting base, 4L, 4R...shaft, 5L, 5R...mirror body, 6L, 6R, 7L, 7R...gear, 8...
Case, ML, MR…Reversible motor, BSL, BSR…
Automatic return type push button switch, LSLN,
LSLB, LSRN, LSRB...Limit switch,
XLB, XLN, XRB, XRN...Relay, xLB,
xLN, xRB, xRN...Contact, DCL, DCR...Drive circuit, DL ₁ to _{DL 4} , DR ₁ to _{DR 4} ...Diode, TrL,
TrR...transistor, rL, rR...resistance.

Claims (1)

[Claims] 1. The left and right side door mirrors are attached to a mounting base on the outside of the vehicle so that they can be raised and folded down, and the output gear of a reversible motor installed inside the mirror body of each door mirror is fixed to a shaft that stands on the mounting base. In the door mirror drive circuit, the reversible motor is driven by the operation of an automatic return type push button switch installed in the vehicle interior to raise and lower the left and right door mirrors independently. a plurality of limit switches that are respectively attached to the mounting portions and detect the upright or down position of each mirror body when the mirror body is in the upright or down position, and connected in series with the limit switch for detecting the upright or down position, and A drive circuit for a folding door mirror, comprising a raising and lowering relay that opens and closes a circuit of a reversible motor in response to a detection signal from the limit switch.