JPH0719906Y2 - Retractable door mirrors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a retractable door mirror in which the angle of the mirror is manually adjusted from the passenger compartment.

(Prior Art) A conventional retractable door mirror is, as shown in FIG. 8, a shaft cylinder erected on a base protruding from a stay (not shown).
A mirror visor (not shown) is attached to 109 so as to be retractable in the front-rear direction, and an operation lever 112 is rotatably supported inside the base via a fulcrum sphere 113, while the operation lever allows the central pivot in the mirror visor to be supported. A door mirror in which a mirror pivotally supported by 104 is tilted to adjust an angle, and a shaft 125 penetrated in the barrel 109 is vertically moved through a link mechanism 150 connected to the operation lever 112. In addition to moving and rotating, the upper end of the shaft 125 and the connecting arm 180 connected to the rear side of the mirror via the free joints 140b and 140c are used to move the shaft up and down and the front and rear of the mirror. It is connected by a conversion means for converting the tilt to the left and right (Japanese Patent Application No. 63-103772).

However, as shown in FIG. 8, the converting means connects the converting arm 160, which is connected to the connecting arm 180, which is provided on the back side of the mirror, through the spherical pivots 140b and 140c so as to be swingable, to the shaft 125 so as to be detachable. The conversion arm 160 should be
The mirror visor, that is, the mirror rotates around the shaft cylinder 109 of the base so that the spiral spring 130 incorporated in the 151 presses the sliding plate 152 against the shaft 125 inserted into the rectangular hole 153 of the frame 151. At this time, the end surface of the rectangular hole 153 engaged with the semi-circular cutout groove of the shaft 125 is disengaged from the cutout groove and rides on the arc surface of the shaft 125 to allow rotation of the mirror around the shaft 125. It was done.

However, since the conversion arm 160 that transmits the rotation and the vertical movement (up and down movement) of the shaft 125 to the mirror is configured to engage with the shaft 125 only at one position by the elastic force of the coil spring 130, it is stable. The operation transmission is not smooth, and in particular, the up-and-down movement of the shaft 125 is converted into a twisting motion that pushes and pulls two linked legs that are superposed on the rear surface side of the mirror in opposite directions. There was a problem that it did not operate smoothly with one end support.

In this plan, the conversion arm is supported at two points with respect to the shaft to increase the rigidity with respect to the up-and-down motion of the shaft to enable smooth operation, and also to hold the mirror so that it does not generate slight vibration when the vehicle is running. is there.

(Means for Solving the Problems) In order to achieve the above-mentioned problems, the retractable door mirror of the present invention is such that a mirror visor is attached to a shaft cylinder erected on a base protruding from a stay so as to be retractable in the front-rear direction. Also, while the operation lever is rotatably supported inside the base via a fulcrum ball, the operation lever allows the mirror pivotally supported by the central pivot in the mirror visor to be tilted to adjust the angle. A door mirror, in which a shaft inserted into the barrel is vertically moved and rotated through a link mechanism connected to the operation lever, and a free joint is provided at an upper end of the shaft and a rear surface of the mirror. And a connecting arm connected via a connecting arm connected by a converting means for converting vertical movement and rotation of the shaft into front and rear and left and right tilts of the mirror. The conversion means is rotatable about the shaft and is not vertically movable.
The arm is composed of a conversion arm pivotally supported by the arm, a pin substantially parallel to the shaft, and a coil spring wound around the pin. The pin is erected on one side of the arm and parallel to each other. A flat surface is provided on the outer periphery of the shaft, both ends of the coil spring sandwich the flat surface, and when the mirror visor is tilted, both ends of the coil spring deviate from the flat surface of the shaft to form an arc surface. The conversion arm is disengaged from the shaft by riding on, and the mirror visor is rotated around the shaft cylinder.

(Operation) The conversion arm is pivotally supported on the shaft by two arm portions so as to be rotatable and not vertically movable. That is, the conversion arm was supported at two points on the shaft. Therefore, the shaft and the conversion arm are integrated with each other to smoothly operate the conversion arm, and the rigidity of the shaft with respect to the vertical movement is increased, so that the vibration transmitted from the conversion arm to the mirror during traveling of the vehicle is significantly reduced.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view showing a foldable door mirror according to an embodiment of the present invention.

As shown in FIGS. 3 and 4, the mirror 1 is held by a mirror holder 2, and the mirror holder 2 and the mirror visor 3 are connected by a ball pivot 4, and the mirror 1 is known with the ball pivot 4 as a center. The rotation preventing means keeps the state in which it can rotate (tilt) about the horizontal axis X and the vertical axis Y.

The mirror visor 3 includes a mounting cylinder 6 mounted on a side surface of a vehicle door, and a shaft cylinder 9 standing on a protruding base 6a.
Is supported so that it can be tilted in the front-back direction of the vehicle. A winding spring 7 is wound around the outer circumference of the shaft cylinder 9. The spiral spring 7 is held in a compressed state between the stopper plate 8 locked to the upper surface side of the shaft cylinder 9 and the bottom surface of the annular groove 10 of the bracket 31, and the lower surface of the bracket 31 and the seat surface of the shaft cylinder 9 are held. Mirror visor 3 through a plurality of ball cracks 44 arranged between
Is elastically supported on the base 6a. The shaft cylinder 9 supports the shaft 25 so as to be able to move up and down (moving up and down) and rotate.

As shown in FIG. 2 to FIG. 4, the knob 11 is provided at one end of the operation lever 12 protruding into the vehicle compartment.
The other end of 12 is fixed to a fulcrum sphere 13. The fulcrum ball 13 is rotatably supported by bearings 14 and 15 provided in the stay 6. Further, as shown in FIG. 5, the fulcrum sphere 13 has bearings 14, 15
And is supported by contacting the inner wall surfaces of the holes 14a and 15a formed in the bearings 14 and 15, respectively. The bearings 14 and 15 are connected by external threads 18 and 18. The hole 15a of the bearing 15 is a long hole 15b on the lever side and a through hole so that the operation lever 12 can be loosely inserted. Therefore, the lateral swinging movement of the operation lever 12 about the fulcrum sphere 13 is restricted by the elongated hole 15b on the lever side.

The link mechanism 20 for converting the twisting rotation and left-right swinging movements of the operating lever 12 into the up-down movement and the rotation movement of the shaft 25 is a guide rod inserted into a through hole 42 provided in the fulcrum sphere 13.
The intermediate portion 20b is fixed to the 26 by a screw 17 via a mounting piece 20d, and the side of the fulcrum sphere 13 is provided in a cylindrical hole 52 provided on the side surface of the leg piece 20a rising from one side of the intermediate portion 20b. A ball pivot 16 at the tip of an arm extending horizontally is fitted to transmit the movement of the operating lever 12 to the link mechanism 20. A leg piece 20c extends from the intermediate portion 20b of the link mechanism 20 toward the lower end of the shaft 25 that is inserted into the shaft cylinder 9, and a lower end arm that horizontally extends laterally from the lower end of the shaft in a cylindrical hole 51 at the tip thereof. A ball pivot 27 at the tip of 29 is engaged.

Both ends of the guide rod 26 are respectively supported by the inner wall of the mounting stay 6, and the guide rod 26 rotates when the operating lever 12 swings to the left and right, and ascends and descends when twisted.

The converting means for connecting the upper end of the shaft 25 and the connecting arm 39 on the rear surface of the mirror to convert the up and down and rotation of the shaft 25 into the tilting of the mirror 1 in the front-rear direction and the left-right direction is not rotatable about the shaft 25. A conversion arm 28 pivotally supported by two arm portions 32 and 34 and a pin 37 substantially parallel to the shaft 25.
And a winding spring 30 wound around the pin 37.

The conversion arm 28 converts the up and down and rotational movements of the shaft 25 into front and rear and left and right tilts of the mirror 1, one end of which is the shaft 25 and the other end is two spherical pivots 40b on the rear side of the mirror.
It is connected to the connecting arm 39 that is provided in an overlapping manner via 40c. The conversion arm 28 is substantially U-shaped and has the arm portions 32, 34.
Has holes 35 and 36 formed at one end through which the shaft 25 is inserted. The upper and lower arm portions 32, 34 each have a horizontal upper flat surface 50a and a horizontal lower flat portion 50b. The intermediate coupling portion 33 at the other end of the arm portions 32, 34 has a standing surface orthogonal to the lower flat surface 50b. The intermediate connecting portion 33 is provided with an engaging hole 54 into which the ball pivot 40a provided at the end of the connecting arm 39 opposite to the mirror is inserted, and the connecting arm 39 is connected to the intermediate connecting portion 33 via the ball pivot 40a. It is rotatably connected.

As shown in FIG. 1, the upper end portion of the shaft 25 has a small diameter, and a step portion 53 is formed between the adjacent upper diameter portion. The large diameter portion of the shaft 25 is provided with a hole 36 in the lower arm portion 34.
Through the hole 35 of the upper arm portion 32, the lower surface of the upper arm portion 32 is brought into contact with the step portion 53 of the shaft 25 for positioning, and the circlip 55 is attached to the tip of the shaft 25 protruding from the hole 35. Attach to prevent it from coming off. A pin 37 parallel to the shaft 25 is planted on the lower flat surface 50b. This pin 37
A coil spring 30 as a clutch member is wound around the coil spring. As shown in FIG. 7 (a), flat surfaces 38a, 38b formed by cutting out both sides of the shaft 25 are provided at both ends 43a of the coil spring 30, respectively. It is clamped by 43b. The flat surfaces 38a and 38b are parallel to each other, and the coil spring 30 wound around the pin 37 is prevented from coming off by a male screw 41.

As described above, the connecting arm 39 engages the two spherical pivots 40b, 40c connected to the rear side of the mirror at one end and the engaging hole 54 provided at the intermediate connecting portion 33c of the converting arm 28 at the other end. It has a ball-pivot 40a to enter and two ball-pivots 40
b and 40c are connected to the rear side of the mirror 1 symmetrically with respect to the horizontal axis X of the mirror 1. Conversion arm when shaft 25 rises
28 also rises, and the ball pivot 40a that engages at the center tip thereof is pulled up. The center of the mirror 1 is a spherical pivot 4
Since the shaft 25 is pivotally supported by the mirror, the upward movement of the shaft 25 is converted into a rotational movement about the X axis of the mirror, and the upper spherical pivot 40b engaged on the rear side of the mirror pushes the lower spherical pivot to push the mirror forward. 40c acts to pull backwards and tilts the mirror 1 forward. The angle adjustment for tilting the mirror 1 rearward is performed by the operation opposite to the above when the conversion arm 28 descends.

Further, the horizontal angle adjustment of the mirror 1 is performed by the rotational movement of the shaft 25. That is, when the shaft 25 is rotated counterclockwise in FIG. 4, both ends of the coil spring 30 wound around the pin 37 eccentrically provided on the shaft 25 are flat surfaces 38.
Since a and 38b are sandwiched, when the conversion arm 28 rotates counterclockwise, a force pulling the connection arm 39 to the conversion arm 28 works, and the mirror 1 connected by the spherical pivot 4 has a vertical axis. Rotate clockwise around Y. Also,
When the shaft 25 is rotated in the clockwise direction, the conversion arm 28 is rotated in the opposite direction to tilt the mirror 1 counterclockwise.

Next, the operation of the retractable door mirror according to this embodiment will be described.

When the operating lever 12 is operated to the left (in the direction of arrow C in FIG. 2), the fulcrum sphere 13 is centered on the sphere pivot 16, and the link mechanism 20.
Also, the guide rod 26 rotates, the ball pivot 27 is displaced to the right (the direction of arrow CII in FIG. 2), the lower end arm 29 moves accordingly, and the shaft 25 rotates counterclockwise.
The rotary movement of the shaft 25 is converted by the coil spring 30 into the conversion arm 28.
The conversion arm 28 rotates in the same direction as the shaft 25, pulls the connecting arm 39, and the mirror 1 rotates clockwise (arrow).
The angle changes by moving in the CIII direction). Similarly, when the operation lever 12 is operated to the right (the direction of arrow D in FIG. 2), the conversion arm 28 rotates clockwise and the mirror 1 moves counterclockwise (the direction of arrow DIII in FIG. 2). The angle changes. Next, when the operation lever 12 is twisted and rotated rightward about the lever shaft (in the direction of arrow B in FIG. 2), the fulcrum sphere 13 is rotated. Fulcrum ball
As shown in FIG. 6, the through hole 42 provided in 13 has a narrow central portion and wide ends, so that even if the operating lever 12 is rotated about the lever shaft, the guide rod 26
The fulcrum sphere 13 rotates a predetermined angle without being hindered by. When the fulcrum sphere 13 rotates, the link mechanism 20 is moved through the sphere pivot 16.
However, since the intermediate portion 20b of the link mechanism 20 is fixed to the guide rod 26 parallel to the shaft 25 and the guide rod 26 is supported by the mounting stay 6 so as to be movable in the rod axial direction. , Connecting arm 20 and guide lot 26
Moves up along the rod axis, the ball pivot 27 is also displaced in the direction of arrow BII in FIG. 2, and the lower arm 29 moves up accordingly, and the shaft 25 also moves up. When the shaft 25 rises, the conversion arm 28 also rises, the lower end arm 29 is pulled upward, and as described above, the mirror 1 rotates around the horizontal axis X (direction of arrow BIII in FIG. 2) and tilts forward, The angle changes. Similarly, when the operation lever 12 is twisted and rotated to the left (direction of arrow A in FIG. 2), the mirror 1 is rotated around the horizontal axis X (arrow AI in FIG. 2).
It turns in the direction II) and tilts backward, changing the angle.

Further, when a force acting toward the rear of the vehicle is applied to the mirror visor 3, the ball clutch 44 between the seat surface of the shaft cylinder 9 and the lower surface of the bracket 31 is disengaged, and the mirror visor 3 is erected on the base 6a. Start to rotate around 9. At that time, the mirror 1 connected to the mirror visor 3 by the spherical pivot 4 via the mirror holder 2 starts to rotate around the barrel 9 integrally with the mirror visor 3, and the conversion arm 28 connected to the mirror 1 also. It follows and rotates integrally. On the other hand, the operating lever
Although 12 also follows initially, the rotation of the bearing 15 is restricted by hitting the wall of the elongated hole 15b of the bearing 15 and brought into a locked state. With the rotation of the mirror visor 3, both ends 43a of the coil spring 30 constituting the clutch member,
43b separates from the flat surfaces 38a, 38b of the shaft 25 and rides on the circular arc surfaces 45a, 45b of the shaft 25 as shown in FIG. 7 (b). As a result, the rotational movement of the conversion arm 28 is not transmitted to the shaft 25, the link mechanism 20 is not destroyed, the operating lever 12 does not displace its position, and the mirror visor 3 is tilted rearward of the vehicle.

(Effect of the Invention) As described above, according to the retractable door mirror of the present invention, the conversion arm is pivotally supported by the shaft by the two arm portions so that the conversion arm can rotate but cannot move up and down. That is, the conversion arm was supported at two points on the shaft. Therefore, the shaft and the conversion arm are more integrated, the movement of the shaft is smoothly transmitted to the conversion arm, the conversion arm operates smoothly, and the operation feeling of the operation lever is improved. In addition, since the rigidity of the shaft with respect to the vertical movement is improved, the vibration transmitted from the conversion arm to the mirror during traveling of the vehicle is significantly reduced, and the slight vibration of the mirror can be prevented. further,
The structure of the clutch mechanism is simple and compact,
Easy to assemble.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of a folding type door mirror according to an embodiment of the present invention, FIG. 2 is a perspective view showing an angle adjusting device thereof, and FIG. 3 is a perspective view showing the angle adjusting device. FIG. 4 is a longitudinal sectional view of the foldable door mirror, FIG. 4 is a transverse sectional view of the foldable door mirror, FIG. 5 is an exploded perspective view showing a part of the angle adjusting device of FIG. 2, and FIG. 6 is a guide rod and others. 7 is a vertical cross-sectional view for explaining the relationship with the parts of FIG. 7, FIGS. 7A and 7B are cross-sectional views for explaining the relationship between the coil spring and the shaft, and FIG. 8 is a conventional retractable type. It is a perspective view showing an angle adjusting device of a door mirror. 1 ... Mirror, 3 ... Mirror visor, 6a ... Base,
12 ... Operating lever, 13 ... fulcrum ball, 16,27,40a, 40b, 40c
…… Spherical pivot, 17 …… Screw, 20 …… Link mechanism, 25…
… Shaft, 26… Guide rod, 28… Conversion arm,
30 …… coil spring, 32, 34 …… arm part, 33 …… intermediate connection part, 35, 36 …… hole, 37 …… pin, 38a, 38b …… flat surface, 43
a, 43b …… both ends of the pin, 45a, 45b …… circular arc, 55 …… circlip.

Claims (1)

[Scope of utility model registration request] 1. A mirror visor is attached to a shaft cylinder erected on a base protruding from a stay so as to be retractable in the front-rear direction,
Further, an operation lever is rotatably supported inside the base via a fulcrum ball, and the operation lever also tilts a mirror pivotally supported by a central pivot in a mirror visor to adjust an angle. In addition, the shaft penetrated in the barrel is vertically moved and rotated through a link mechanism connected to the operation lever, and a free joint is provided between the upper end of the shaft and the rear surface of the mirror. In the retractable door mirror, which is connected by a conversion means for converting the vertical movement and rotation of the shaft into front and rear and left and right tilts of the mirror, the conversion means rotates the shaft. A conversion arm pivotally supported by two arm portions that are movable but not vertically movable, a pin substantially parallel to the shaft, and a coil spring wound around the pin, A pin is erected on one side of the arm portion, flat surfaces parallel to each other are provided on the outer circumference of the shaft, and both ends of the coil spring hold the flat surface, and when the mirror visor is tilted, the coil spring is Both ends of the shaft are disengaged from the flat surface of the shaft and ride on an arc surface, whereby the conversion arm is disengaged from the shaft and the mirror visor is rotated around the shaft cylinder. Retractable door mirror.