JP2510225Y2 - Electric remote control mirror - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a rearview mirror such as an automobile door mirror.
The present invention relates to a remote control type mirror device having a structure capable of arbitrarily adjusting a support angle of a mirror body with respect to a mirror housing.

[Conventional technology]

7 and 8 show known examples of this type of electric remote control mirror.

FIG. 7 is a front view showing the drive unit with the mirror body removed, with a part of the drive unit housing 1 cut away. FIG. 8 is a sectional view taken along the line VIII-VIII with the mirror body attached.

Two orthogonal axes X-X 'and Y-Y' are set, a ball joint 2 is provided at the intersection O thereof, and the mirror body 3 is tiltably supported by the ball joint 2 as shown in FIG. 4 is a mirror body.

As shown in FIG. 7, advancing and retracting rods 5 are provided on the XX 'axis and the YY' axis, respectively. This advancing / retreating rod 5 is provided with a ball joint 6 at its tip as shown in FIG.
Connected to A groove 7 in the axial direction is provided in the advancing / retreating rod 5, the groove 7 is engaged with a protrusion 8 provided in the drive unit housing to stop rotation, and the receiving gear 9 at the final reduction stage is advancing / retreating. It is fitted to the outside of the No. 5. Each of the receiving gears 9 is rotated by a motor 10 via a reduction gear portion 11.

As described above, the advancing / retreating rod 5 is locked for rotation about the axis, and the male screw provided on the outer periphery of the advancing / retreating rod 5 is screwed into the receiving gear 9, so that the advancing / retreating rod 5 rotates as the receiving gear 9 rotates. Is driven in the axial direction to tilt the mirror body.

[Problems to be solved by the device]

The adjustment range of the tilting angle of the mirror body 4 by the drive unit (FIGS. 7 and 8) is set to such an extent that it can cover the range required when traveling on a road under normal conditions. In addition, the operation speed is kept at a speed that can be adjusted with precision as practically necessary. This is because it is rather difficult to adjust to a desired angle if tilting too fast.

However, under special driving conditions such as when moving backward near the shoulder of a road or when performing a side-by-side driving operation, there is a case where it is desired to visually observe the vicinity of the rear wheels by the reflected image of the door mirror.

In order to bring the reflected image near the rear wheels into the driver's field of view, it is necessary to tilt the door mirror downward by a certain angle as compared with the door mirror angle during normal driving. The above-mentioned fixed angle varies depending on the type of the car, and is 5 to 7 °.
However, for one type of vehicle, the angle is approximately constant.

In the conventional remote control type door mirror, it is not impossible to expand the working range of the drive unit to cover the mirror angle at which the rear wheels can be visually observed, but there are the following problems. In short, this problem is a balance problem between expanding the range of the tilting angle of the mirror and increasing the tilting speed of the mirror. That is, (a) if the range of the mirror tilt angle is expanded by the depression angle for width-shifting and the mirror tilt speed is not changed, the operation time is long and inconvenient.

(B) If the tilting speed is increased in proportion to the expansion of the mirror tilting angle range, precision operation cannot be performed during remote control during normal traveling.

(C) Further, in any of the above cases (a) and (b), when the vehicle is returned from the normal traveling state to the rear wheel confirmation posture and then returned to the normal traveling state again, the previous time (before the rear wheel confirmation posture). Since the adjustment has been lost, it has to be readjusted, which is inconvenient.

(D) In addition, there are the following difficulties. In the above operation, after the tilting of the mirror is stopped by the stopper, the rotation torque of the drive motor is increased by the reduction gear and the mirror is forcibly tilted. It causes a biting phenomenon and becomes immobile. The present invention has been made in view of the above circumstances, and it is possible to quickly and easily perform a switching operation between the normal running state and the rear wheel confirmation state without affecting the operation accuracy of the original remote control. In addition, the mirror angle adjustment state in the normal running state is stored, and it can be accurately restored when the rear wheel confirmation state is restored to the normal running state. It is an object of the present invention to provide an electric remote control mirror that does not cause biting.

[Means for solving the problem]

As a configuration for achieving the above object, the present invention supports a mirror body so as to be tiltable with respect to a housing of a mirror driving unit, and attaches one end of each of a plurality of threaded advancing and retracting rods provided on the driving unit. In the electric remote control mirror, which is connected to the mirror body through a ball joint, and is capable of screw-feeding the threaded advancing / retreating rods via screw members that are screwed into each of the threaded advancing / retreating rods, It has a tubular advancing / retreating rod provided with a male screw, and two parallel surfaces slidably fitted to each other while locking relative rotation with respect to a vertical split slit provided in the tubular advancing / retreating rod. A drive shaft, a nut member having a female screw threaded to the male screw of the advancing and retracting rod provided with the male screw, a male screw member provided on the outer peripheral side of the nut member, and a screw thread on the male screw member. Has female screw hole to fit Comprising a drive cylinder that, each positive of the drive shaft and drive cylinder, a plurality of motors to reverse, and a stopper means for limiting the rotation angle of said mirror body,
The drive shaft is structured to be driven by a motor through a reduction gear train, and the receiving gear at the final reduction stage of the reduction gear train and the drive shaft cause a slip when a torque of a predetermined value or more is received. As a means for cutting off the above-mentioned power transmission, as a means for cutting off the above-mentioned power transmission, a slit groove having a width dimension W is provided in a vertically split type of the above-mentioned forward / backward rod, and a male screw provided on the forward / backward rod is provided. The drive shaft is divided into two parts and can be bent in a direction to reduce the screw diameter thereof, and the drive shaft has two parallel surfaces with a thickness dimension t <w, and is free from play in the slit groove. The fitting screw amount D between the male screw of the advancing and retracting rod and the female screw of the nut member is D <W-t.

[Action]

According to the above configuration, when the drive cylinder is rotated and the male screw member provided on the outer periphery of the nut member is screw-fed, the nut member is screw-fed while maintaining a constant screwing relationship with the male screw of the advancing / retreating rod. Then, the advance / retreat rod is moved back and forth. This fulfills the function of a normal remote control mirror.

When the drive shaft is rotated independently of the nut member, the advancing / retreating rod is rotated and the screw is fed to the nut member. As a result, in addition to the function as a normal remote control mirror, the function of temporarily tilting the mirror downward to bring it into the rear wheel confirmation state or to restore the normal running state is achieved. Moreover, this operation is performed independently of the above-mentioned nut member, and since the nut member is not rotated, it does not affect the mirror support angle in the normal traveling state and can be accurately restored.

In the normal running state, no matter how the support angle of the mirror is adjusted, when the advancing / retreating rod rotates and moves forward through the drive shaft, the mirror tilts downward and hits the stopper to tilt the mirror downward. A large load is applied to the transmission section that is being driven in the direction to allow it.

When a large torque is applied to the male screw of the advancing / retreating rod, a large pressure is applied to the screw slope of the advancing / retreating rod, the screw diameter is contracted by the reaction force of the pressure, and the screwing with the female screw is released, causing idling. To do. This action is due to the fact that the advancing / retreating rod is provided with a vertical dividing groove so that it can be bent, and 1/2 (W-
This can be done by having a bending allowance of t) and the amount of the fitting screw being smaller than this bending allowance.

In this way, since the advancing / retreating rod idles with respect to the nut member, there is no risk of biting on the screw member (excessive torque that causes biting is not applied).

Furthermore, since the above-mentioned slipping point is the final stage of the deceleration transmission mechanism from the motor to the advancing and retracting rod, and low speed and large torque, torque management is easy, and transmission is interrupted with a predetermined torque. Highly reliable operation.

As a general effect of the above-described operation, the present invention enables quick and easy switching operation between the normal running state and the rear wheel confirmation state without affecting the original remote control operation accuracy. In addition, the mirror angle adjustment state in the normal running state is stored, and it can be accurately restored when the rear wheel confirmation state is restored to the normal running state. It is possible to configure an electric remote control mirror that does not cause sticking.

〔Example〕

FIG. 3 (A) shows a drive unit in an embodiment of the present invention and corresponds to FIG. 7 in the conventional example.

An advance / retreat rod 5a for driving the mirror left / right and an advance / retreat rod 5b for up / down drive are provided in the drive unit housing 1'and are respectively driven by motors 10a, 10b via reduction gear groups 11a, 11b. .

The structure of the advancing and retracting rod 5a for tilting the mirror in the left and right direction, the motor 10a, and the reduction gear group 11a is similar to that of the conventional example, but a mechanism for vertical drive (advancing and retracting rod 5b, motor 10b,
The reduction gear group 11b, etc.) is provided with a mirror tilting mechanism III for rear wheel confirmation, which will be described below with reference to FIG.

FIG. 3 (B) is a schematic diagram cut and drawn in the vicinity of the tilting mechanism III for checking the rear wheels, which is drawn for convenience of explanation of the configuration and operation. In particular, it is not a view cut along one plane, but a view cut along a curved surface so that related members can be conveniently represented. The upper part of FIG. 3B corresponds to the upper part of the apparatus, but since the cutting by the curved surface is developed in the upper and lower parts of the drawing, the upper and lower member arrangement relationships in the drawing are not always the same as those of the present embodiment. is not.

Reference numeral 1'denotes a drive unit housing which supports a mirror body 3 via a ball joint 2 so as to be tiltable. Reference numeral 4 denotes a mirror body, which is fixed to the mirror body 3. The ball joint 2 is a spherical seat 1a provided on the drive unit housing 1 '.
And a spherical portion 3a provided on the mirror body 3 are fitted together.

When the mirror body 3 further rotates counterclockwise (downward) from the state shown in the drawing, the tip 3a _-1 of the spherical portion 3a comes into contact with the bottom of the spherical seat 1a and acts as a stopper.

Reference numeral 5b is a tubular advancing and retracting rod, which is provided with a cut 5b _-2 to form a bifurcated shape, and a male screw 5b _-1 is formed at the tip thereof. The details will be described later with reference to FIG.

Reference numeral 12 is a nut member that is screwed into the advancing / retreating rod 5b and screw-feeds it, and is a female screw that is screwed into the male screw 5b- _1.
A male screw piece 12b having a leaf spring shape and having a flexibility is integrally connected to the outer periphery of the male screw piece 12b.

Reference numeral 13 is a transmission member for rotationally driving the advancing / retreating rod 5b, and a drive shaft 13a is arranged at the center thereof. The drive angular shaft 13a is slidably fitted into the slit 5b _-2 of the advancing / retreating rod 5b through a large gap. The details will be described later with reference to FIG.

The drive shaft 13a is fixed to the base gear 13b. 13c is a tooth of the base gear 13b. This base gear
13b is rotationally driven by a motor 10c via an intermediate gear 14, a worm receiving gear 15, and a worm original gear 16 which are screwed to its teeth 13c.

In FIG. 3 (B), when the motor 10c is stopped and the motor 10b is rotated normally and reversely, the drive cylinder 17 is normally and reversely rotated through the reduction gear group 11b. The male screw 12b of the nut member 12 is screwed into the female screw 17a of the drive cylinder 17, and the nut member 12 is locked against rotation with respect to the drive portion housing 1'by guide means (not shown). , Is guided in the axial direction.

Therefore, the nut member 12 is screw-fed in the left-right direction in the drawing by the rotation of the drive cylinder 17. The reciprocating rod 5b has its male screw
Since 5 _b-1 is screwed into the nut member 12 and its rotation is suppressed by the drive shaft 13a, it is moved together with the nut member 12 and tilts the mirror body 3 up and down via the ball 5b _-3 . .

Further, when the motor 10b is stopped and the motor 10c is rotated, the transmission member 13 is rotated, and the drive shaft 13a rotates the advancing / retreating rod 5b and feeds it to the left and right in the figure by screws. When the advancing / retreating rod is screw-fed in the extending direction (leftward in the drawing), the mirror body 3 tilts downward (counterclockwise in the drawing).

By the downward tilting of the mirror body 3, the spherical portion of the ball joint 2
When the tip 3a- ₁ of 3a comes into contact with the bottom of the spherical seat 1a, the tilting of the mirror body 3 is stopped, and the advancing / retreating rod 5b is screw-fed in the contracting direction to allow the cap nut-shaped bottom 12c of the nut member 12 to move. And the tilting of the mirror body 3 is stopped.

When the tilting of the mirror body 3 is stopped, the male screw 5b- ₁ of the advancing / retreating rod 5b idles with respect to the female screw 12 of the nut member as described below.

FIG. 1 is a cross-sectional view schematically illustrating the vicinity of the advance / retreat rod 5b,
FIG. 2 is an exploded perspective view of the same.

A ball 5b _-3 is fixed to one end of the advancing / retreating rod 5b, and a slit 5b _-2 is cut from the other end of the advancing / retreating rod 5b.
Is bifurcated.

A male screw 5b- _{1 that} is screwed into the nut member 12 is formed at the tip of the bifurcated portion.

On the other hand, the drive shaft 13a has an elongated plate shape with a thickness t,
It is continuously connected to the base gear 13b.

Arm 5b of bifurcated pair formed by Setsuwari 5b _-2 of said _- has flexibility, they are opposed to each other in the width dimension W.

The width W is set to Wt> 2D. However, D is a fitting screw amount of the male screw 5b- ₁ and the female screw of the nut member 12.

When the base gear 13b rotates and the drive shaft 13a rotates the advancing / retreating rod 5b, the male screw 5b- _{1 of the} advancing / retreating rod 5b is screw-fed by the nut member 12. However, when the forward / backward movement of the advancing / retreating rod 5b is prevented, the arm 5b- ₄ is bent and the male screw 5b- ₁ and the nut member 12
The female screw of and slips.

In order to idle as above, 2D as described above
<Requires Wt.

As described above, the motor 10b can also be used by the motor 10c.
Also tilts the mirror body 3 independently of each other,
When the tilting of the mirror body 3 reaches the stroke end and the stopper operates, the male screw 5b- ₁ and the nut member 12 are unscrewed and the base gear 13b idles.

In this example, the rotation speed of the motor 10c is about 6 times that of the motor 10b.

Furthermore, the reduction gear group 11b has a transmission gear ratio of about 3.3.
It is twice.

As a result, the tilting of the mirror body 3 by the motor 10b
It is 3.3 seconds / 10 degrees, and the tilting of the mirror body 3 by the motor 10c is 0.5 seconds / 10 degrees, so that the tilting of the mirror body 3 by the motor 10c is performed extremely rapidly.

Next, the operation of the electric remote control mirror of this embodiment constructed as described above will be described.

FIG. 4 (A) illustrates the normal running state of the remote control mirror of the embodiment shown in FIG. 3 (B).
The motor 10b is operated in accordance with the seat height of the driver and other conditions, and the dimension L shown in the figure is arbitrarily adjusted to adjust the bearing angle of the mirror body 4 as desired.

From this state (Fig. 4 (A)), the motor 10c is operated to screw the advancing / retreating rod 5b leftward in the drawing in a direction of extension, as shown in Fig. 4 (B), and the ball joint 2 is full. It acts as a stopper by turning to, and resistance is applied to the transmission member.

Therefore, with the configuration described with reference to FIG. 1, the advancing / retreating rod 5b idles with respect to the nut member 12, the driven side (mirror base 3, etc.) stops, and the driving side (motor 10c, etc.) idles.

In this way, an excessive torque is released, so that an unreasonable force is not applied to the transmission member, especially the screw feed mechanism. This prevents the screw member from biting.

In the state shown in FIG. 4 (B), the dimension L shown in the figure is the same as that shown in FIG. 4 (A). In this way, the mirror body 4 tilts downward and the rear wheel confirmation state is obtained.

Operate the motor 10c again to drive the base gear 13b and drive angle 1
When 3a is reversed, the advancing / retreating rod 5b contracts to the right in the drawing, the mirror body 3 is tilted upward while the dimension L remains unchanged, and the mirror body 3 begins to restore to the state of FIG. 4 (A). Advance / retreat
When 5b is fully contracted with respect to the nut member 12, the advancing / retreating rod 5b idles with respect to the nut member 12 in the same manner as described above, completes the restoration, and becomes the normal traveling state (Fig. 4 (A)).

In this way, the motor 10c is remotely controlled without changing the dimension L (the value that determines the bearing angle of the mirror body 3 in the normal traveling state) adjusted according to the conditions of the individual drivers. The rear wheel confirmation state can be switched, and moreover, the mirror bearing angle can be accurately restored to the normal running state before the rear wheel confirmation state (dimension L is unchanged).
In addition, since the above switching operation is performed by the motor 10c, the switching operation can be performed quickly independently of the mirror support angle adjustment by the motor 10b and at an angular velocity about 6 times as high as the mirror support angle adjustment by the motor 10b.

The stopper action that limits the tilting stroke of the mirror body 3 is due to the limit of the rotatable angle of the ball joint 2 when tilting downward, and to the limit of the screw feed movement of the advancing and retracting rod 5b with respect to the nut member 12 when tilting upward. Determined.

Further, as shown in the sectional view of FIG. 3 (B), the screw feed mechanism when driven by the motor 10b and the screw feed mechanism when driven by the motor 10c have a triple cylindrical shape. Since it has a telescopic structure (triple structure of the drive cylinder 17, the nut member 12, and the advancing / retreating rod 5b), it can be formed in a small size.

FIG. 5 (A) is shown to explain the state in which the mirror body 3 is set relatively upward in the normal running state, and is adjusted to the extreme (full stroke) upward, and is described in FIG. The dimension L is zero.

Even if the motor 10c is operated in this state, FIG. 5 (B)
As shown in the figure, the mirror body 3
Is tilted downward.

Therefore, the rear wheel confirmation state shown in FIG.
The stored adjustment value (dimension L) in the normal running state is different from the rear wheel confirmation state shown in FIG. 6B, but the tilt angle of the mirror body 3 is the same (the rotation of the ball joint 2 is the same). It is full of motion limit).

FIG. 6 is shown so as to be compared and contrasted in order to understand the operation of the above-described embodiment, and illustrates a state in which the downward tilting of the mirror body 3 is maximized in a normal traveling state.

In this operation, the drive cylinder 17 is rotated by the motor 10b, the nut member 12 is screw-fed, and the advancing / retreating rod 5b is moved in the extending direction (leftward in the drawing) without rotating. Therefore, the advance / retreat rod 5b
Is in contact with the cap nut-shaped bottom of the nut member 12 and remains at the contraction stroke end, and the nut member 12 and the transmission member are
The dimension L'with 13 is L '>> L.

[Effect of device]

As described above, according to the configuration of the present invention, the switching operation between the normal traveling state and the rear wheel confirmation state can be performed quickly and easily without affecting the original operation accuracy of the remote control. In addition, the mirror angle adjustment state in the normal running state is stored, and it can be accurately restored when the rear wheel confirmation state is restored to the normal running state. Moreover, the screw feeding of the transmission system is possible. It has an excellent practical effect that it does not bite the part.

[Brief description of drawings]

FIG. 1 is a schematic sectional view in the vicinity of an advancing / retreating rod in an embodiment of an electric remote control mirror according to the present invention, and FIG. 2 is an exploded perspective view of the same. FIG. 3 shows an embodiment of an electric remote control mirror according to the present invention, and is an overall view corresponding to the embodiment shown in FIGS. 1 and 2, and FIG. FIG. 3 (B) is a front view of the housing 1'with the lid removed, and FIG. 3 (B) is a sectional view. 4 (A), (B), FIGS. 5 (A), (B), and FIG. 6 are operation explanatory views of the embodiment shown in FIG. 3 (B). 7 and 8 show an example of a conventional electric remote control mirror, FIG. 7 is a partially cutaway front view of a drive unit, and FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. . 1,1 '... Drive housing, 2 ... Ball joint, 3 ... Mirror body, 4 ... Mirror body, 5,5a, 5b ... Advancing and retracting rod, 5b _-2 ... Slitting, 1
0, 10a, 10b, 10c ... Motor, 12 ... Nut member, 13 ... Transmission member, 13a ... Drive shaft, 13b ... Base gear, 13c ... Teeth.

Claims (1)

(57) [Scope of utility model registration request] Claim: What is claimed is: 1. A mirror body is tiltably supported with respect to a housing of a mirror drive section, and one end of a plurality of threaded advancing and retracting rods provided on the drive section are respectively connected to the mirror body through ball joints. In the electric remote control mirror having a structure in which the threaded advancing / retracting rods can be screw-fed through screw members that are screwed into the threaded advancing / retreating rods respectively, a tubular advancing / retreating with a male screw on the outer periphery is provided. A rod, a drive shaft having two parallel faces slidably fitted to each other while locking relative rotation with respect to a vertical split groove provided in the tubular advancing and retracting rod, and the male screw A drive having a nut member having a female screw that is screwed into the male screw of the advancing and retracting rod, a male screw member provided on the outer peripheral side of the nut member, and a female screw hole that is screwed into the male screw member. Cylinder, drive shaft and drive It is provided with a plurality of motors for rotating the cylinders forward and backward, and stopper means for limiting the rotation angle of the mirror body, and the drive shaft is driven by the motors through a reduction gear train. The drive gear and the receiving gear at the final reduction stage of the reduction gear train are provided with a mechanism that causes a slip when a torque of a predetermined value or more is received, and cuts off the transmission. The advancing / retreating rod is provided with a longitudinally split type slit having a width dimension W so that the male screw provided on the advancing / retreating rod is divided into two and can be bent in a direction of reducing the screw diameter. And the drive shaft has two parallel surfaces with a thickness t <w and is loosely fitted in the slit groove, and the male screw of the advancing and retracting rod and the female screw of the nut member are provided. The fitting screw amount D with is D <W-t. Formula remote control mirror.