JPS61105247A - Fordable door mirror - Google Patents

Abstract

PURPOSE:To try to obtain compactness and cheapness by making, oparative, a electric motor driven material to raise and fall a mirror body of foldable door mirror, by means of a detecting material and tow pieces of relay with merely operating single operating material. CONSTITUTION:In a device for giving turning movement between upright posi tion and laid position to the mirror body of door mirrors at left and right side by operation of reversible motor ML, MR, the limit switches LSLN, LSRN are provided foropening the point of contact by detecting a mirror body when it is in right position. And also limit switches LSLB, LSRB are provided for detecting that the mirror body is in laid position, and switching themselves from NC contact point to NO contact point. Furthermore, relays XB, XN of single pole whose contact points XB, XN close NO circuit, at the time of mag netic excitation are provided, and the relay XB is excited through NC circuit of contact point XN at the time of operating push button switch BS.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a folding door mirror in which a mirror body is assembled to a mounting base that is attached to the left and right doors of a vehicle so that it can be raised and lowered. be.

[Prior Art] In general, the left and right side door mirrors of a car protrude further from the car body to the sides 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. If necessary, the mirror body can be lowered from the upright position when in use to reduce the amount of overhang. Various types of door mirrors have been developed in the past.

[Problems to be Solved by the Invention] However, with 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 raising 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. This poses 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, but such conventional methods operate a motor that raises and lowers the left door mirror body. At least 2 pieces to operate the motor that raises and lowers the mirror body of the right door.
Since a total of at least four relays are required, the cost is high, and a large space is required for installing the relays, resulting in an increase in the size of the door mirror.

This invention solves the above-mentioned problems of the conventional ones, and provides a folding door mirror that can electrically operate the raising and lowering of the left and right mirror bodies, is inexpensive, and can be made more compact. The purpose is to provide the following.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a collapsible door mirror in which a mirror body is assembled to a mounting base attached to the left and right doors of a vehicle so that the mirror body can be raised and lowered. An electric drive member for raising and lowering each of the mirror bodies is provided, and the electric drive member and a single operating member detect when each of the mirror bodies is in the upright position and when it is in the fall position, respectively. It is operated by a member and only two relays.

[Function] By adopting the above means, the left and right side door mirrors can be raised or lowered by operating the electric drive member by the detection member and only two relays by simply operating a single operation member. It will be done.

[Example] Embodiments of the invention shown in the drawings will be described below.

FIG. 1 shows an embodiment of the present invention, in which mirror bodies 5L and 5R are connected to mounting bases 3L and 3R attached to left and right doors 2L and 2R of an automobile 1 via shafts 4L and 4R.
, 4R is rotatably assembled around the mounting base 3.
L, 3R or the mirror body 51.5R is provided with reversible motors ML, MR, and by rotation of the reversible motors ML, MR, the mirror bodies 51, 5R are erected as shown by solid lines via gears 6L, 6R and gears 7L, 7R. It is designed to move between position N and a laid-down position (rear position) B indicated by a chain line. The mounting bases 3L and 3R also include a limit switch LSLNSLSRN that detects when the mirror bodies 51 and 5R are in the upright position N, and a mirror body 5.
Limit switches SLB and LSRB are provided to detect when L and 5R are in the laid down position B.

In the above description, the letter L refers to the left side, and the letter R refers to the right side. Although not shown in FIG. 1, a single pushbutton switch (indicated by BS in FIGS. 2 to 7) is provided in the cabin of the automobile 1 and can be operated from the driver's seat. A drive circuit (indicated by DC in FIGS. 2 to 7) is provided for raising and lowering both the left and right mirror bodies 51.5R by operating this push button switch.

Fig. 2 shows an embodiment of the drive circuit DC, and the pushbutton switch BS is of an automatic return type that closes the circuit between the contacts only while it is pressed.
N detects this only when the mirror body 51°5R is in the upright position MN and opens the contacts, otherwise the contacts are always closed, and the limit switch LSL
R.

LSRB detects this only when the mirror bodies 5L and 5R are in the folded position B and switches to the No contact side, otherwise the NG contact is always closed, and the reversible motors ML and MR are connected to the terminal N. When current flows from terminal B to terminal B, the mirror body 51.5R is moved from the upright position N to the laid down position @B, and when current flows from terminal B to terminal N, the mirror bodies 5L and 5R are raised from the laid down position B. It is designed to move toward position N. XB is a single-pole relay whose contact xB closes the No circuit only when it is energized and keeps the N0 circuit closed at all other times, and XN is a single-pole relay whose contact xN closes the No circuit only when it is energized. Other than that, it is a single-pole relay that keeps the N0 circuit closed at all times, Tr.
is a transistor, SW is a switch that similarly opens and closes in conjunction with the pushbutton switch 88, r, , r2 are resistors, and D1 to
D8 is a diode, and Ds and Do are surge voltage absorbing diodes, which may be omitted.

This drive circuit operates like a DC converter.

° First, when the mirror bodies 51, 5R are in the upright position N (or between the upright position N and the collapsed position B), when the pushbutton switch BS is pressed, the relay XB is energized via the N0 circuit of the contact XN. , Therefore, the NG contact of limit switch LSLB, LSRB and diode D? are connected through the N0 circuit of contact x3. , current flows through Da and relay X
B is self-held, while the reversible motors ML and MR are connected to the diodes D+ and D2 (limit switches LSLN and LSRN when the mirror body 51.5R is between the upright position N and the down position B) and the NC of the contact XN. A current flows from the terminal N to the terminal B via the circuit, and the mirror body 51.5R is thereby moved toward the collapsed position B.

When mirror bodies 5L and 5R reach the prostrate position 11B,
When the limit switches LSLB and LSRB are switched to the No contact side, the reversible motors ML and MR are de-energized, and the mirror body 51.5R stops moving and is held at the collapsed position 8 by appropriate mechanical means, while the relay XB is Demagnetized. In this process, if one of the mirror bodies (for example, 5L) reaches the laid down position B first, the limit switch LSLB switches to the No contact side and the mirror body 5L is stopped and held at the laid down position B. But diode D
Since the relay XS continues to be self-retained through the mirror 8, the reversible motor MR continues to be energized and the mirror body 5R is moved to the collapsed position B. Mirror body 5R falls down first.
The same applies when reaching B. When both the mirror bodies 51 and 5R reach the collapsed position B, the reversible motor ML or MR, which had been energized until then, switches to the limit switch LSLB or LSRBtf due to its inertia.
Even if it switches to the iNo contact side, it does not stop instantly, and the rotation generates an electromotive force that generates a positive potential at terminal N. This delays the demagnetization timing of relay XB, which causes limit switches LSLB and LSRB to switch to No. Contact x that still closes the No circuit when switched to the contact side
A bias voltage necessary for conduction is applied to the base and collector of the transistor Tr via B, and at this moment, the transistor Tr becomes conductive and the relay XN is excited, and as will be described later, the terminals of the reversible motors ML, MR1, Current flows from terminal B to terminal N, causing the mirror body 51.5R to move toward the upright position N again, but the switch works in conjunction with the pushbutton switch BS and opens when the pushbutton switch BS is released. Due to the action of SW, transistor Tr is not conductive, relay XN is not excited, and as a result, both mirror bodies 51.5R are in the reclined position fff
It is held at fB.

Next, mirror bodies 5L and 5R are in the prone position 1i1ffB
When pushbutton switch BS is pressed, relay
B is energized via the N0 circuit of contact XN, so that the N0 circuit of contact XB and the limit switch LsLB,l
A bias voltage necessary for conduction is applied to the base and collector of the transistor Tr through the -8RB(7) No connection a, and at this time, the switch SW is closed in conjunction with the pushbutton switch BS, so the transistor Tr is Conduction relay XN is energized, so that current flows through the limit switch LSLN, LSR, N and diodes Ds, Da through the No circuit of contact xN, and relay XN is self-holding, while when pushbutton switch BS is released. Reversible motors ML and MR are connected to terminal B via diodes D3 and D4 and the NC circuit of contact xB of demagnetized relay XB.
A current flows from the terminal N to the mirror body 51.
．． 5R is moved toward the standing position N. When the mirror bodies 51, 5R reach the standing position N, the contacts of the limit switches LSLN, LSRN are opened, so that the reversible motors ML, MR are de-energized, and the mirror bodies 51, 5R stop moving and are activated by appropriate mechanical means. is held in the upright position N, while relay XN is demagnetized. In this process, if one of the mirror bodies (for example, 5L) reaches the standing position N first, the contact of the limit switch LSLN is opened and the mirror body 5L is stopped and held at the standing position N, but the diode Since the relay XN continues to be self-held through Da, the reversible motor MR continues to be energized, and the mirror body 5R is moved to the standing position N and then stopped.
Retained. The same applies when the mirror body 5R reaches the collapsed position B first.

Also, when only one of the mirror bodies 51.5R (for example, 5 m) is in the laid down position B, when pushbutton switch BS is pressed, relay XB is energized via the NC circuit of contact XN, so that contact xB Current flows through the NG contact of limit switch LSR8 and diode D8 through the No circuit, and relay XB is self-held, while
Reversible motor MR has diode D2 (mirror body 5
(when R is in the standing position N) or limit switch L
SRN (Mirror body 5R standing IN and lying down @B
), and a current flows from the terminal N to the terminal B via the N0 circuit of the contact xN, and the mirror body 5R is thereby moved toward the collapsed position B. When the mirror body 5R reaches the fallen image MB, the limit switch L
SRB switches to the NO contact side and the mirror body 5R stops at the collapsed position B, and even if the demagnetization timing of the relay XB is delayed due to the inertia of the reversible motor MR at this time, the pushbutton is closed in conjunction with the pushbutton switch BS. Due to the function of the switch SW, which opens when the switch BS is released, the transistor Tr is not conductive and the relay XN is not excited, and as a result, the mirror body 5R is held at the inverted image IB. The same applies when only the mirror body 5R is in the folded position B.

Furthermore, a switch SW that interlocks with the pushbutton switch BS
is not limited to the illustrated position, but can be placed at either position A or B in the figure.

FIG. 3 shows another embodiment of the drive circuit DC, in which the relay XN in FIG. 2 is connected to the collector of the transistor Tr, whereas it is connected to the emitter of the transistor Tr. diode Ds in the self-holding circuit of relay XN.

DηIDII and D12 are provided, and a push button switch 8 is provided.
A switch interlocked with 8 is placed at any of the positions A, B, C, and D in the figure, and the other parts are the same as in FIG. 2. If the operation of the relay XN is unstable when connected as an emitter as shown in FIG. 2, it may be connected as a collector as shown in FIG. 3.

FIG. 4 shows still another embodiment of the drive circuit DC, which includes constant current diodes A-CRD1, CRD2 and a diode D in place of the transistor Tr in FIG.
0 is used, and the constant current diode CRD1.
Relay XN is energized only when current flows through both CRD2, and a switch that interlocks with pushbutton switch BS is placed at either position A or B in the diagram, but the rest is the same as in Figure 2. belongs to. Relay XN
When I and N are the current values required to be excited, the current value (rated current) I that can flow through each of the constant current diodes CRDI and CRD2 is calculated by the following formula:
The setting may be made to satisfy I<I<21 N .

FIG. 5 shows still another embodiment of the drive circuit DC, which uses resistors r+, r2 and a diode D9 in place of the transistor Tr in FIG. 2, and includes resistors rl, r, , so that the relay XN is energized only when current flows through both, and the switch that interlocks with the pushbutton switch BS is set to either A or B in the figure.
The other parts are the same as those shown in FIG. 2. The voltage value required for relay XN to be energized is V
If the winding resistance of the xN1 relay XN is r, then the resistance value r of the N resistors r, , r2 (r=r+ =r2) may be set to satisfy the following equation.

FIG. 6 shows another embodiment of the drive circuit DC, which includes the limit switches LSLB, LSR of FIG.
B respectively limit switches LSLB1. LSLB2
and limit switch LSRB1. It is separated into LSRB2 and operates as follows.

First, when the mirror bodies 51, 5R are in the upright position N (or between the upright position N and the down position B), when the pushbutton switch BS is pressed, the relay XS is activated by the limit switch L.
It is energized through the NC contact of SLBI and the N0 circuit of contact As shown in FIG. 2, current flows from the terminal N to the terminal B of the reversible motors ML, ~IR, which causes the mirror bodies 5L, 5R to
is moved toward the prone position tiRB.

When mirror bodies 5L and 5R reach the collapsed position B, limit switches LSLB2. Since the contacts of LSRB2 are opened, the reversible motors ML and MR are de-energized, and the mirror bodies 51 and 5R stop moving and are held at the collapsed position B by appropriate mechanical means, while the limit switch LSL
Since B1 and LSRBl switch to the NC contact side, relay
B is demagnetized. In this process, if one of the mirror bodies (for example, 5L) reaches the laid down position @B first, the reversible motor ML is de-energized and the mirror body 51 is stopped and held at the laid down position B, but the diode D7 , relay XB continues to be self-held via the NC contact of limit switch LSLB1 and the NC contact of limit switch LSRB1, so the reversible motor MR continues to be energized and the mirror body 5R is moved to the collapsed position B, then stopped and held. Ru. The same applies when the mirror body 5R reaches the prostrate position t&B first.

Next, when the mirror bodies 5L and 5R are in the prostrate position 1fB, when pushbutton switch BS is pressed, relay XN is energized via the No contacts of limit switches LSLB1 and LSRBl and the NC contact of contact The mirror body 51.5R is placed in the upright position N in the same manner as in FIG.
When the robot reaches the standing position @N, the robot stops moving and holds the position.

be done.

Also, when only one of the mirror bodies 51.5R (for example, 5L) is in the collapsed position B, when pushbutton switch BS is pressed, relay XB is activated by limit switch LSL.
It is excited through the NC contact of BI, the NC contact of limit switch LSRB1, and the NC circuit of contact
When it reaches the laid-down position B, it stops moving and is held there. The same applies when only the mirror body 5R is in the folded position B.

FIG. 7 shows yet another embodiment of the drive circuit DC, which includes the limit switch LSLB2 of FIG.
．． LSRB2 and the starting diodes D3 and D4 connected in parallel to them are removed, and at least one of the mirror bodies 51.5R (for example, 5R) is moved toward the collapsed position B by the rotation of the reversible motor MR. During this period, the other reversible motor ML rotates both after the mirror body 5L reaches the prostrate position first and when it is in the prostrate position B from the beginning, so the reversible motor ML slips at the prostrate position B. When the mirror body 5R reaches the lodging position mortar, both the reversible motors ML and MR stop.

[Effects of the Invention] Since the present invention is constructed as described above, it is possible to electrically operate the left and right mirror bodies to raise and lower them by simply operating a single operating member. You don't have to go out of the car or open the window and put your hands out each time you fold down the left and right door mirrors before entering the garage, or raise them after leaving the garage, which is especially useful on rainy or snowy days. It is convenient to handle during the cold season, and since the electric drive member is operated by a single operating member, a detection member, and only two relays, the cost is low and it is possible to realize a single combination. It has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the main parts showing one embodiment of the present invention, and FIG.
7 are sequence diagrams showing different embodiments of the drive circuit. 1... Car, 2L, 2R... Door, 3m, 3R.
...Mounting base, 4L, 4R...Shaft, 5L, 5R...
・Mirror body, 6L, 6R, 7L, 7R...gear,
M.L. MR...Reversible motor, BS...Push button switch,
LSLN, LSRN, LSLB, LSRB...Limit switch, XB, XN...Relay, x3. XN...
・Contact, DC...Drive circuit, D1-D12...Diode, Tr...Transistor, SW...Switch, rl. rl...Resistor, cRoi, CRD2... Constant current diode Figure 4 Figure 5 Procedure

Claims (1)

[Scope of Claims] 1. In a foldable door mirror in which mirror bodies are assembled to mounting bases attached to left and right doors of a vehicle so as to be able to stand up and fall down, an electric drive for raising and falling down each of the mirror bodies. A member is provided, and the electric drive member is actuated by a single operating member, a member for detecting when each mirror body is in an upright position and in a collapsed position, and only two relays. A folding door mirror that is characterized by 2. The foldable door mirror according to claim 1, wherein the electric drive member comprises a reversible motor. 3. The foldable door mirror according to claim 1, wherein the operating member is an automatic return type push button switch provided inside the vehicle interior. 4. The foldable door mirror according to claim 1, wherein the detection member comprises a limit switch. 5. The foldable door mirror according to claim 1, wherein both of the relays are single-pole relays.