JPS6330584Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an angle adjustment device for remotely controlling the angle of an outer mirror such as a fender mirror or a door mirror of an automobile from inside the vehicle.

This type of device is generally electrically operated, and the mirror is tiltably supported approximately in the center by a coupling member consisting of a pivot and a pivot receiver, and a push rod is placed at a right angle to this support. The push rods are connected to each other, and the mirror is tilted vertically and horizontally by moving the push rod in the axial direction by a motor. The motor and push rod are connected by screwing a male thread formed on the outer circumferential surface of the push rod into a female thread formed in the center of a drive gear that is driven to reduce speed by the motor. In response, the push rod moves axially and tilts the mirror.

By the way, even if the outer mirror is electrically operated, it may be necessary to manually adjust the angle, and the structure is such that when the mirror is moved by hand, the threaded portion between the push rod and the drive gear becomes misaligned. Therefore, the thread engagement between the push rod and the drive gear must be forcibly changed.
Requires considerable force. In addition, the push rod is made of special rubber, mainly urethane rubber, and its flexibility makes it easy to change the engagement, but the material cost is high and the hardness changes considerably depending on the temperature. Therefore, there are problems such as difficulty in manual adjustment at low temperatures.

The present invention focuses on these problems and aims to provide an angle adjustment device that can be easily manually adjusted. It is characterized by having a cutout hole that extends diametrically across and extends in the axial direction. In other words, the push rod is cut vertically and has a cutout hole, which allows the push rod to easily bend in the diametrical direction, making it easy to change the engagement with the drive gear and perform manual adjustment. Therefore, it can be manufactured at low cost.

Next, the present invention will be explained in detail with reference to the illustrated embodiments. Although the present invention can be applied to a drive mechanism having one motor/one electromagnetic solenoid type, this embodiment is an example of a two-motor type drive mechanism.
FIG. 1 is a rear view, FIG. 2 is a sectional view, and FIG. 3 is an exploded perspective view showing main parts. In the figure, 1 is a mirror, 2 is a mirror holder, and 3 is a casing consisting of a lower casing 3a and an upper casing 3b.By fitting the pivot 4 of the mirror holder 2 into the pivot receiver 5 of the lower casing 3a, the mirror The holder 2 is tiltably supported by the casing 3. The pivot 4 is connected to the mirror holder 2 by an arm 4a, and the pivot receiver 5 is provided with a slit 5a to increase elasticity. 6 is a push rod made of a thermoplastic resin molded product having appropriate elasticity such as nylon or polyacetal resin; 7 is a pivot provided at the tip of the push rod 6 via a narrow diameter portion 7a; and 8 is a pivot provided on the mirror holder 2. By fitting the pivot 7 into the pivot receiver 8, the push rod 6 is tiltably connected to the mirror holder 2. Two sets of these push rods 6, pivot receivers 8, and drive mechanisms described below are provided, one for vertical adjustment and one for horizontal adjustment, and the pivot receivers 8 are located below and beside the pivot 4 that supports the mirror holder 2, respectively. It is located. The pivot receiver 8 is provided with a slit 8a to increase its elasticity. Further, a male thread 9 is formed on the outer circumferential surface of the push rod 6, and a notch hole 10 is provided that extends diametrically across the central axis and extends in the axial direction. It is split vertically in half. FIG. 4 shows details of this push rod 6, and the shape of the cutout hole 10 when viewed from the side is an elongated rectangle or a shape close to this. 11 is a drive gear supported by the casing 3 so as to be rotatable but immovable in the axial direction;
Reference numeral 12 denotes a female thread formed in the center, and the male thread 9 of the push rod 6 is screwed into this female thread 12. 13 is a drive motor; 14, 15, and 16 are drive gears 1 that reduce the rotation of the drive motor 13;
1, and these are attached to the casing 3 by suitable means (not shown). The entire device described above is housed in a case body (not shown), and the mirror 1 is exposed through the opening of the case body.

The device of this embodiment is constructed as described above, and when the motor 13 is driven by a switch operation, the drive gear 11 rotates at a low speed and the push rod 6 is moved in the axial direction by the female screw 12. In response to the movement, the mirror holder 2 tilts about the pivot 4 as a fulcrum. Therefore, by appropriately rotating the two motors 13 in the normal or reverse direction, the attitude of the mirror holder 2 can be changed vertically and horizontally, and the direction of the mirror 1 can be adjusted as desired. When the mirror 1 is moved by manual operation, the push rod 6 is deflected in the diametrical direction by the cutout hole 10, and the male screw 9 easily disengages from the female screw 12 of the drive gear 11, so that the The engagement can be changed without applying excessive force,
The direction of the mirror 1 can be easily adjusted manually with a small force. In addition, the push rod 6 is made of a thermoplastic resin with appropriate elasticity, such as nylon or polyacetal resin, so after manual operation, the threaded portions will engage again and return to the state where electric operation can be performed, and the temperature will change. Since the flexibility hardly changes even when the temperature changes, the resistance force during manual operation is always the same regardless of the temperature, so manual adjustment is not difficult to perform at low temperatures, and the manufacturing cost is also reduced. This is possible.

FIG. 5 shows another example of the shape of the cutout hole 10 of the push rod 6. When the cutout hole 10 is viewed from the side, it has an hourglass shape that is narrow at the center and widened at both ends. For this reason, the wall thickness of the part where the notch hole 10 is provided is thicker at the center and thinner at both ends, making it difficult to bend in the center and easy to bend at both ends, so the bending load is almost constant over the entire length, and when making manual adjustments. The resistance force can be kept almost constant over the operating range.

FIG. 6 shows an example of a push rod 6 in which the thickness of the part provided with the cutout hole 10 remains constant, but the center part is curved outward in an arch shape. It has a swollen shape. When combined with the drive gear 11, there is no bulge and the shape is the same as that shown in Figure 4a, but since a force that tends to spread outward is applied to the center part, which tends to bend, the bending load as a whole is reduced. It can be kept almost constant over the entire length, making the resistance force uniform during manual adjustment.

As mentioned above, the push rod 6 has a cutout hole 10.
However, the width of the notch hole 10 when viewed from the side (dimension A in FIG. 7), that is, the size of the portion hollowed out by the notch hole 10, There is a limit to this, and if this is too large, the stiffness of the push rod 6 will drop more than necessary, making it impossible to operate smoothly. Therefore, this dimension A is 1/1/2 of the diameter d of the push rod 6.
It is desirable to set it to 2 or less. In addition, the notch hole 10
Since it passes through the center axis of the push rod 6 in the diametrical direction, sharp edges are formed at both ends, which may impede smooth operation or damage the drive gear 11.
There is a risk of damaging the internal thread 12 of the 6a in Fig. 7 is a chamfer provided at both ends to prevent this. If the chamfer dimension B is too large, the rigidity of the push rod 6 will decrease, so the dimension B should be kept to 1/4 or less of the diameter d. This is desirable.

In all of the above examples, the cutout hole 10 is provided in one direction across the central axis, but in this case, the flexibility differs depending on the orientation of the push rod 6, and it is difficult to keep the deflection load uniform. It may be difficult. In order to solve this problem, FIG. 8 shows a structure in which notched holes 10 are provided in a cross shape, thereby achieving almost constant flexibility in any direction. In this case, the dimension A of the notch hole 10 is
can be made smaller than that in one direction only, and the chamfer dimension B is selected within a range in which the external threaded portion of the surface remains over a certain area.

The male thread 9 formed on the outer peripheral surface of the push rod 6 is within the range of the notch hole 10, and at least one other end thereof is formed with an outer diameter smaller than the root diameter of the male thread 9. It can be fitted.

As is clear from the embodiments described above, the present invention includes a push rod that is screwed onto the drive gear, moves in the axial direction, and tilts the mirror, and is made of elastic synthetic resin. This is a cut-out hole that penetrates in the diametrical direction and extends in the axial direction, which increases the flexibility of the push rod in the axial direction, making it easier to change the engagement with the drive gear during manual operation. Therefore, the resistance during manual operation is small and manual adjustment can be performed easily.Moreover, the hardness of the push rod does not change depending on the temperature, so manual adjustment can be easily performed even at low temperatures.It also reduces costs. It has many advantages, such as being able to be measured.

[Brief explanation of the drawing]

Fig. 1 is a rear view of one embodiment of the present invention, Fig. 2 is a sectional view taken along the line X-X in Fig. 1, Fig. 3 is an exploded perspective view showing only the main parts of the same, and Fig. 4a is the same as the above. Side view of Pushrod, Figure 4b is Figure 4aY-Y
5 and 6 are side views of the push rod in other embodiments, and FIGS. 7 and 8 are sectional views of the push rod in other embodiments, respectively. 1... Mirror, 2... Mirror holder, 4... Pivot, 5... Pivot receiver, 6... Push rod, 6a... Chamfered portion, 7... Pivot, 8...
... Pivot receiver, 9 ... Male thread, 10 ... Notch hole, 11 ... Drive gear, 12 ... Female thread, 1
3...Motor.

Claims (1)

[Claims for Utility Model Registration] (1) A push rod is connected to a tiltably supported mirror, and a male thread formed on the outer circumferential surface of the push rod is connected to a female thread formed in the center of a drive gear that is driven to reduce speed by a motor. In this outer mirror angle adjustment device, the mirror angle is adjusted by moving the push rod in the axial direction. An angle adjustment device for an outer mirror, which is provided with a notched hole that is cut and penetrates in the diametrical direction and extends in the axial direction. (2) An angle adjustment device for an outer mirror according to claim 1, wherein the cutout hole has a rectangular shape when viewed from the side. (3) The angle adjusting device for an outer mirror according to claim 1, wherein the cutout hole is shaped like a drum, narrowing at the center and widening at both ends, when viewed from the side. (4) Utility model registration claim No. 1 in which the width of the notched hole as viewed from the side is 1/2 or less of the diameter of the push rod, and chamfered portions of 1/4 or less of the diameter are formed at both diametrical ends. Angle adjustment device for the outer mirror as described in . (5) The male thread formed on the outer peripheral surface of the push rod is within the range of the notch hole, and at least one other end thereof is formed with an outer diameter smaller than the root diameter of the male thread. Angle adjustment device for the outer mirror.