JPH0735790Y2 - 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 that it can be folded back and forth, and an operation lever 112 is rotatably supported inside the base via a fulcrum sphere 113. A door mirror in which a mirror pivotally supported by 104 is tilted to adjust an angle, and a shaft 125 loosely inserted in the barrel 109 is vertically moved through a link mechanism 120 connected to the operation lever 112. And the upper and lower ends of the shaft 125 and the connecting arm 180 connected to the rear side of the mirror through the free joints 140b and 140c are used to move the shaft up and down and to the left and right of the mirror. It is connected by a conversion means for converting into tilting (Japanese Utility Model Application No. 63-103772).

The link mechanism 120 has an intermediate portion 120 as shown in FIG.
b is rotatably and vertically movable attached to a guide rod 126 fixed in parallel to the shaft 125, and the tip end of the leg piece 120a standing up from one side of the intermediate portion 120b is lateral to the fulcrum sphere 113. A ball pivot 127 provided at the tip of a lower end arm 129 that extends laterally from the lower end of the shaft 125, is connected to the tip of an actuating piece 115 that extends horizontally to the intermediate part 120b. It is engaged in a cylindrical hole 151 provided at the tip of a leg piece 120c extending toward the lower end of the shaft 125, and transmits the movement of the operation lever 112 to the shaft 125 so that the shaft 125 can be vertically moved and rotated. It is configured.

(Problems to be solved by the invention) However, when the operation lever 112 is twisted and rotated around the lever axis in the B direction, a vertical force is applied to the lower end arm 129 of the shaft 125, and the force is the upper end of the shaft 125. Since it is transmitted to the conversion arm 160 connected to the shaft through the frame 151, the force point and the action point are located at both ends of the shaft 125, respectively.

Therefore, a rotational moment in the opposite direction is applied to the upper end and the lower end of the shaft 125, and the inner periphery of the barrel 109 is loosened from the outer periphery of the shaft 125, increasing the frictional resistance and
The 5 did not move smoothly, and the operation feeling of the operating lever 112 was uncomfortable. To make the operation smoother, the length of the shaft cylinder 109 may be increased so that the upper end of the shaft 125 is supported at a lower distance from the lower end, but a mirror visor is elastically mounted on the base around the shaft cylinder. It is necessary to wind a coil spring to be supported on the upper side of the coil spring. Since the upper surface of the coil spring is held by a stop plate that is locked to the shaft 125, the shaft cylinder 109 can be extended beyond this stop plate. I couldn't.

The present invention has been made in view of the above-mentioned circumstances, and by supporting the upper end of the shaft above the locking position of the coil spring, the shaft can be smoothly moved up and down, and the operation feeling of the operating lever is improved. An object of the present invention is to provide a retractable door mirror.

(Means for Solving the Problem) In order to achieve the above-mentioned object, 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 loosely inserted 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. And a connecting arm connected thereto by a conversion 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 composed of a conversion arm that is rotatable above the shaft and vertically supported by two arms.
The shaft is rotatably supported between the two arms by a guide member that is erected on a mirror bracket that supports the mirror visor, and the lower end of the shaft is provided at the lower end of the barrel. It is characterized in that it is pivotally supported by a bush so as to be vertically movable and rotatable. Also,
The upper end of the guide member supports the shaft above a coil spring that elastically supports the mirror visor on the base.

(Operation) When the operation lever rotates around the lever axis and a vertical force is applied to the lower end arm, a lateral load is applied to the shaft, but the guide member moves up and down the upper end of the shaft. Since the bush supports the lower end of the shaft so that it can move up and down, the shaft does not fall in the barrel and friction resistance does not increase.

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, the mirror holder 2 and the mirror visor 3 are connected by a ball pivot (central pivot) 4, and the mirror 1 is mounted on the ball pivot 4. It is kept in a state in which it can be rotated (tilted) about the horizontal axis X and the vertical axis Y by a known detent means around the center.

The mirror visor 3 is supported by a shaft cylinder 9 standing upright on a base 6a protruding from a mounting stay 6 attached to the side surface of the vehicle door so as to be tiltable in the front-rear direction of the vehicle. A winding spring 7 is wound around the outer circumference of the shaft cylinder 9. The coil spring 7 is held in a compressed state between the stopper plate 8 that is locked to the upper surface side of the shaft 25 and the bottom surface of the annular groove 10 of the bracket 31. The mirror visor 3 is elastically supported on the base 6a via a plurality of ball clutches 44 arranged between the two. The lower half of the shaft 25 is loosely inserted in the barrel 9.

On the mirror bracket 31, as shown in FIG. 1, a hollow substantially conical guide member 60 centering on the shaft 25 is erected. The lower end of the guide member 60 is fixed on the mirror bracket 31 by a screw 63, and a guide hole 61 is formed in the top end of the guide member 60 so as to tightly support the upper end of the shaft 25 so that the upper end of the shaft 25 can be rotated and moved up and down. ing. The inner diameter of the guide hole 61 is smaller than the inner diameter of the barrel 9. An annular bush 62 is embedded in the inner periphery of the lower end portion of the shaft tube 9. The bush 62 supports the lower end of the shaft 25 so as to be rotatable, vertically movable, and tightly supported. Further, the inner diameter of the bush 62 is equal to the inner diameter of the guide hole 61. Therefore, the shaft 25 is supported at both upper and lower ends and does not contact the inner circumference of the barrel 9.

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 sphere 13 is rotatably supported by bearings 14 and 15 provided in the mounting stay 6. The fulcrum sphere 13 is provided with a through hole 13a,
In the through hole 13a, guide rods 26, both ends of which are supported by the inner wall of the mounting stay 6 so as to be rotatable and vertically movable, are loosely inserted. However, as shown in FIG. 2, the inner diameter of the through hole 13a gradually increases as it goes from the middle portion to both ends of the through hole 13a. Therefore, when the operation lever 12 is twisted and rotated about the lever axis, The fulcrum ball 13 rotates in the same direction by a predetermined angle without being hindered by the guide rod 26.

Further, as shown in FIGS. 3 and 5, the fulcrum sphere 13 is sandwiched between the bearings 14 and 15, and is supported by contacting the inner wall surfaces of the holes 14a and 15a provided in the bearings 14 and 15, respectively. Bearings 14 and 15 are external threads 18,
Combined by 18. The hole 15a in the bearing 15 is
The lever side elongated hole 15b and the through hole are formed so that the 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 the lateral swinging movement of the operating lever 12 into the vertical movement and the rotational movement of the shaft 25 includes a guide rod 26 which is loosely inserted in a through hole 13a provided in the fulcrum sphere 13 and an intermediate portion 20b thereof. Is fixed by a screw 17 via a mounting piece 20d, and extends horizontally to the side of the fulcrum sphere 13 in a cylindrical hole 52 provided on the side surface of the leg piece 20a rising from one side of the intermediate portion 20b. The ball pivot 16 at the tip of the arm 64 is fitted to transmit the movement of the operation 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.

The guide rod 26 rotates when the operation lever 12 swings left and right, and moves up and down 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 but movable in 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 converting arm 28 converts the vertical movement and the rotational movement of the shaft 25 into the tilting movement of the mirror 1 in the front-rear direction and the left-right direction. It is connected to the connecting arm 39 which is provided in a piled manner via The conversion arm 28 has a substantially U shape, and the arm portions 32, 34 have holes 35, through which the shaft 25 is inserted, at one end thereof.
36 are drilled. 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 provided with the ball pivot 40a.
It is rotatably connected to the intermediate connecting portion 33 via.

As shown in FIG. 6, 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, 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. The through hole 13a provided in the fulcrum sphere 13 has a narrow middle portion,
Since both ends are wide, when the operation lever 12 is rotated about the lever shaft, the fulcrum sphere 13 rotates in the same direction as the operation lever 12 by a predetermined angle without being obstructed by the guide rod 26. When the fulcrum sphere 13 rotates, the link mechanism 20 also tries to rotate via the sphere pivot 16, but 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 Since the mounting stay 6 is movably supported in the rod axis direction, the link mechanism 20 smoothly moves up along with the guide rod 26 along the rod axis, and the ball pivot 27 is also displaced in the arrow BII direction in FIG. Accordingly, the lower end arm 29 rises, and the shaft 25 also rises. At this time, even if a lateral load is applied to 125, since both ends of the shaft 25 are supported by the guide member 60 and the bush 52, the shaft 25 in the barrel 9 is prevented.
The shaft 25 smoothly rises without falling. When the shaft 25 rises, the conversion arm 28 also rises and the lower end arm 29
Is pulled upward, and as described above, the mirror 1 rotates about the horizontal axis X (in the direction of arrow BIII in FIG. 2) and tilts forward to change the angle. 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 (direction of arrow AIII in FIG. 2) and tilted backward to change 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, since 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 means is a conversion arm pivotably supported by two arms so as to be rotatable above the shaft and fixed vertically. The guide member is provided upright on the mirror bracket that supports the mirror visor, and
The arms are vertically rotatably and pivotally supported between the arms, and the lower end of the shaft is vertically and rotatably supported by a bush provided at the lower end of the shaft cylinder. When rotated around, the shaft does not fall in the barrel and frictional resistance does not increase. Further, the upper end of the shaft is supported above the locking position of the coil spring.

Therefore, the shaft can be smoothly moved up and down without lengthening the barrel, and the operation feeling of the operation lever is improved.

Further, since the converting means is composed of the converting arm having two arms, the connecting strength between the converting means and the shaft can be increased. Further, since the shaft is axially supported by the guide member between the two arms, the guide member can reliably receive the force acting on the connecting portion between the two arms and the shaft when the shaft moves up and down and rotates. As a result, smooth operation of the shaft is ensured.

Further, since the shaft is supported by the guide member which is separate from the shaft cylinder, it is not necessary to form the shaft cylinder high, and the degree of freedom in designing the connecting portion between the shaft and the converting means can be increased.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view showing a main part of a retractable door mirror according to an embodiment of the present invention, FIG. 2 is a perspective view showing the entire angle adjusting device, and FIG. 3 is the angle adjusting device. FIG. 4 is a longitudinal sectional view of the retractable door mirror provided, FIG. 4 is a transverse sectional view of the retractable door mirror, FIG. 5 is an exploded perspective view showing a part of the angle adjusting device of FIG. 2, and FIG. 2 is an exploded perspective view showing a part of the angle adjusting device, FIGS. 7 (a) and 7 (b) are cross-sectional views for explaining the relationship between the winding spring and the shaft, and FIG. It is a perspective view which shows the whole angle adjustment apparatus of a door mirror. 1 ... Mirror, 3 ... Mirror visor, 6 ... Mounting stay, 6a ... Base, 7 ... Winding spring, 9 ... Shaft cylinder, 12 ... Operating lever, 13 ... Support ball, 13a ...... Through hole, 16,27,40a, 40b, 40c …… Spherical pivot, 17 …… Bolt, 20 …… Link mechanism, 20a, 20c …… Leg piece, 20b …… Intermediate part, 39 …… Coupling arm, 25 ... Shaft, 26 ... Guide rod, 28 ... Conversion arm, 30 ... Winding spring, 31 ... Mirror bracket, 37 ... Pin, 60 ... Guide member, 61 ...
… Guide hole, 62… Bush.

Front page continuation (72) Inventor, Yatsu Masaru, Sadohara-cho, Miyazaki-gun, Miyazaki 3700 Wadayama, Shimonaka, Honda Lock Co., Ltd. (56) Bibliography 2-24738 (JP, U) -81341 (JP, U) Actually open 2-98043 (JP, U) Actually open 63-34641 (JP, U)

Claims (2)

[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 loosely inserted into the barrel is vertically moved and rotated via 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 a retractable door mirror, which is connected with a connecting arm to be 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 converting means is disposed above the shaft. A guide which is composed of a conversion arm pivotably supported by two arms so as to be rotatable and vertically fixed, and which is erected on a mirror bracket for supporting the mirror visor. The shaft rotatably and vertically rotatably supported between the two arms by a guide member, and the lower end of the shaft rotatably and vertically rotatably supported by a bush provided at the lower end of the shaft cylinder. A retractable door mirror that is characterized. 2. The foldable door mirror according to claim 1, wherein the upper end of the guide member supports a shaft above a coil spring that elastically supports a mirror visor on a base.