JP2000229558A - Outer mirror - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outer mirror simplified in structure and reduced in the number of part items. SOLUTION: An outer mirror is provided with a wiper 2 wiping the surface of a pane of mirror glass 1, a wiper shaft 3 reciprocatively and rotationally driving the wiper 2, a mirror holder 11 protecting the circumference and the back part of the mirror glass 1, and a holder base 12 connected to the back part of the mirror holder 11. A bracket 41 provided with a base end bearing part 411 holding the end part of the wiper shaft 3 freely rotationally is arranged in the holder base 12, while in the mirror holder 11 a front end bearing part 111 holding the tip part of the wiper shaft 3 freely rotationally is arranged, so that simplification of structure and reduction in the number of part items can be accomplished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer mirror such as a fender mirror or a door mirror installed outside a vehicle or the like, and more particularly to an outer mirror having a warper function.

[0002]

2. Description of the Related Art As this type of outer mirror, for example, as schematically shown in FIG.
There is known a device provided with a wiper 2 for wiping the surface of the device. The periphery and back of the mirror glass 1 are protected by the mirror holder 11. Mirror holder 11
Is, via a holder base 12 connected to its back,
The tilting drive is performed by a drive mechanism (not shown).

The wiper 2 is composed of a wiper head 2
1, a wiper arm 22, and a wiper blade 23. The wiper head 21 is connected to the wiper shaft 3, and is driven to reciprocate by the wiper shaft 3. The wiper head 21 and the wiper shaft 3 are connected by screws 21a.

The wiper shaft 3 has a base end rotatably held by a first bracket 41 and a tip end rotatably held by a second bracket 42. The wiper shaft 3 is driven by a driving mechanism (not shown). And are driven to reciprocate. The first bracket 41 is formed integrally with the holder base 12, and has a base end bearing portion 41a that rotatably holds the base end of the wiper shaft 3 at the front end thereof. On the other hand, the second
The bracket 42 is fixed to the holder base 12 so as to be fitted to the first bracket 41, and a tip bearing 42a for rotatably holding the tip of the wiper shaft 3 is provided at the tip thereof. Is formed.

The mirror glass 1 and the mirror holder 11 are formed with a U-shaped groove 1a for transmitting the reciprocating rotational displacement of the wiper shaft 3 from the inside to the outside of the mirror glass 1.

[0006]

However, the conventional outer mirror has a mechanism for tilting the mirror glass 1 up, down, left and right, and a wiper shaft 3.
There is also a problem that the structure is complicated and the number of parts is large because a mechanism for driving is provided.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an outer mirror capable of simplifying the structure and reducing the number of parts.

[0008]

In order to solve the above problems, the present invention provides a wiper (2) for wiping the surface of a mirror glass (1), and a wiper shaft () for reciprocatingly driving the wiper (2). 3) and a mirror holder (11) for protecting the periphery and back of the mirror glass (1).
And a holder base (12) connected to the back of the mirror holder (11). The holder base (12) has a base end (3) of a wiper shaft (3).
a) is provided with a bracket (41) having a proximal bearing (411) for rotatably holding the mirror holder (1).
1) is characterized in that a tip bearing (111) for rotatably holding a tip (3b) of a wiper shaft (3) is provided.

In the invention configured as described above, the tip bearing (111) for holding the tip (3b) of the wiper shaft (3) is provided on the mirror holder (11). The bracket used to hold the tip (3b) of the shaft (3) is not required. Therefore, the structure can be simplified and the number of parts can be reduced, and the cost and weight can be reduced accordingly.

[0010] In addition, in the conventional case, a step or a gap is formed in a joint portion between the front end bearing portion of the bracket and the mirror holder (11). However, such a step or a gap is not generated in the present invention. Therefore, while the appearance is improved,
There is an advantage that the degree of freedom in design is also improved.

Further, since the mirror holder (11) is provided with a tip bearing (111) for holding the tip (3b) of the wiper shaft (3), the positional accuracy between the wiper 2 and the mirror glass 1 is extremely high. It will be improved.
Therefore, the wiping range of the wiper 2 and the pressing force of the wiper 2 are extremely constant without variation, so that a high quality outer mirror can always be provided.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. However,
Elements common to the constituent elements shown in the conventional example are denoted by the same reference numerals, and description thereof will be simplified.

The outer mirror DM shown in this embodiment is
The wiper 2 is configured as a door mirror and wipes the surface of the mirror glass 1 as shown in FIGS.
A wiper shaft 3 for reciprocatingly rotating the wiper 2, a mirror holder 11 for protecting the periphery and the back of the mirror glass 1, and a holder base 12 connected to the back of the mirror holder 11. The holder base 12 includes a bracket 41 having a proximal bearing 411 that rotatably holds the proximal end 3 a of the wiper shaft 3.
And the mirror holder 11 is provided with a tip bearing 111 for rotatably holding the tip 3b of the wiper shaft 3.

Hereinafter, the above configuration will be described in more detail. That is, the holder base 12 is integrally connected to the back of the mirror holder 11. Also,
The holder base 12 has a tilting center position connected to a drive mechanism 14 via a pivot bearing mechanism 13 and has four rods 14 a to 1 protruding from the drive mechanism 14.
4d.

The pivot bearing mechanism 13 has a spherical concave surface 141 formed on the drive mechanism 14, a spherical outer surface (not shown) and a spherical inner surface 121a which protrude toward the drive mechanism 14 in the holder base 12 and fit into the spherical concave surface 141. A holding member 131 having a spherical convex surface 131a fitted to the spherical inner surface 121a;
And a screw 133 connecting the drive mechanism 1 to the drive mechanism 14 via a coil spring 132.

The holding member 131 has a circular flat surface 131b on the surface opposite to the spherical convex surface 131a, and the through hole 13 is formed at the center of the flat surface 131b and the spherical convex surface 131a.
1c is formed. The through hole 131c is a screw 133
Of the screw 133a is inserted. Also,
An annular groove 131d for holding the coil spring 132 is formed coaxially with the through hole 131c on the flat surface 131b. In addition, the screw 133 has
A washer 133b formed slightly larger than the outer diameter of the coil spring 132 is provided.

The screw 133 is connected to the driving mechanism 14
Are screwed into a cylindrical portion 142 protruding from the center position of the spherical concave surface 141 at this time, and a predetermined compressive deformation is applied to the coil spring 132 at that time. Then, due to the compressive deformation, the spherical convex surface 131a of the holding member 131, the spherical inner surface 121a of the spherical cylindrical portion 121, and the spherical cylindrical portion 12
The spherical outer surface 1 and the spherical concave surface 141 of the drive mechanism 14 come into contact with each other with a predetermined surface pressure, so that the holder base 12 tilts smoothly with respect to the drive mechanism 14.

Each of the four rods 14a to 14d is provided with a corresponding one of holes 14e provided at each of the upper, lower, left and right positions in the drive mechanism 14.
To 14h, the head of which is rotatably connected to the holder base 12. However, the upper rod 14a
Is connected to the holder base 12 via a transmission gear 51 described later. Then, by adjusting the amount of protrusion of the lower rod 14c by a dedicated motor (not shown) provided in the drive mechanism 14, the holder base 12 is tilted up and down to drive the amount of protrusion of the right rod 14d. The holder base 12 is tilted in the left-right direction by adjusting with a dedicated motor (not shown) provided in the mechanism 14. Since the holder base 12 and the mirror holder 11 are integrally connected, the mirror glass 1 also tilts at the same angle as the holder base 12.

The upper rod 14a is driven to rotate by a wiper motor (not shown) provided in the drive mechanism 14. Then, as shown in FIG. 2, the rotational movement of the rod 14a is transmitted from the transmission gear 51 to the driven gear 52, and is converted into a reciprocating movement when transmitted from the driven gear 52 to the link mechanism 6. 7 to the wiper shaft 3 as reciprocating rotational displacement.

The link mechanism 6 includes a driven gear 52 meshed with the transmission gear 51, an eccentric pin 61 provided on the driven gear 52, a link arm 62 having one end rotatably connected to the eccentric pin 61, The other end of the link arm 62 has a clutch plate 63 rotatably connected thereto. The clutch plate 63 has a through hole 63a rotatably fitted to the central portion 3c of the wiper shaft 3, and a tip of a lever 63b projecting eccentrically to the through hole 63a is It is rotatably connected to the other end via a pin 64. Further, an engagement hole 63c is formed in the clutch plate 63 at a position equally divided into three on a concentric circle with the through hole 63a.

The clutch mechanism 7 has a through hole 7 fitted in the above-mentioned clutch plate 63 and a two-chamfered portion 3d formed at a base end position of the central portion 3c of the wiper shaft 3.
1a, a disk-shaped clutch holder 71 that rotates together with the wiper shaft 3, a washer 72, an E-ring (retaining ring) 73, and a boundary between the tip 3a and the center 3c of the wiper shaft 3. An annularly projecting flange 3 e, a coil spring 74 arranged in a compressed state between the flange 3 e and the clutch plate 63,
And three balls 75.

As shown in FIG. 3, the clutch holder 71 has a thickness smaller than the diameter of the ball 75 and is formed in a disk shape. A fitting hole 71b large enough to receive the diameter of the ball 75 at a position corresponding to the engaging hole 63c.
Are formed. Then, the clutch plate 63
Of the ball 7 protruding from the fitting hole 71b.
5 are formed so as to be engaged with the crown.

The washer 72 has a through-hole 72a at the base end 3.
When fitted into the clutch holder 71, the ball 75 is in close contact with the base end side surface of the clutch holder 71 to prevent the ball 75 in the fitting hole 71b from falling off to the base end side. The E-ring 73 prevents the washer 72 from moving away from the clutch holder 71 by engaging with the annular groove 3f formed in the base end 3a.

The coil spring 74 pushes the clutch plate 63 against the washer 72 through the clutch holder 71 with a predetermined elastic force, so that the reciprocating force transmitted from the link arm 62 is transmitted to the engaging hole 63 c of the clutch plate 63. , Ball 75, fitting hole 71 of clutch holder 71
b to the central portion 3c of the wiper shaft 3. However, when an excessive force acts on the clutch plate 63 from the link arm 62 because the movement of the wiper 2 is obstructed, the coil spring 74 bends by a predetermined amount, and the ball 75 comes off from the engagement hole 63c. This prevents an excessive force from acting and prevents the members and the wiper 2 on the force transmission path from being damaged. The ball 75 is formed of, for example, a steel ball.

In FIG. 2, reference numeral 62a denotes an eccentric pin 6;
1 are through-holes, and 62b and 63d are pins 64.
76 is an annular groove 64 of the pin 64.
And an E-ring (retaining ring) that keeps the pin 64 fitted in the through holes 62b and 63d.

Further, a through hole 21 of the wiper head 21 is provided at a tip end side of the tip end portion 3b of the wiper shaft 3.
3b, and a male screw portion 3g connected to the wiper head 21 by screwing the nut 21c is formed.
Further, a serration 3h for reliably transmitting the rotational force to the wiper head 21 is formed in the tapered portion between the male screw portion 3g and the distal end portion 3b. The serrations (not shown) that mesh with the serrations 3h are also formed on the wiper head 21.

The above-mentioned mirror holder 11 is integrally formed of a hard resin. As shown in FIG. 1, the tip bearing portion 111 includes a cylindrical holder portion 111a formed integrally with the mirror holder 11, and a bearing metal 111b fixed in the holder portion 111a. When molding the mirror holder 11 by insert molding, the bearing metal 111 b
a.

On the other hand, the bracket 41 is also integrally formed of hard resin. The base bearing 411 is a cylindrical holder 411 formed integrally with the bracket 41.
a and a bearing metal 411b fixed in the holder portion 411a. The bearing metal 411b is used when the bracket 41 is formed by insert molding.
It can be integrally attached to the holder 411a.

Further, the bracket 41 is used for the mirror holder 1.
Since the holder 1 and the holder base 12 are integrally connected, it is preferable that the holder 1 and the holder base 12 be detachably mounted on the holder base 12 in order to facilitate assembly of the link mechanism 6 and the clutch mechanism 7. That is, after fitting the distal end portion 3b of the wiper shaft 3 to the distal end bearing portion 111 or installing the link mechanism 6, the clutch mechanism 7, and the like, the proximal end bearing portion 411 is fitted to the proximal end portion 3a of the wiper shaft 3. While
The bracket 41 is attached to the holder base 12 or the mirror holder 11
It is preferable to configure so as to be fixed to Even if the bracket 41 is formed integrally with the holder base 12, the link mechanism 6 can be formed by properly performing the assembly procedure.
And the clutch mechanism 7 and the like can be assembled.

Outer mirror D constructed as described above
In the case of M, since the front end bearing portion 111 for holding the front end portion 3b of the wiper shaft 3 is provided on the mirror holder 11, the bracket conventionally used for holding the front end portion 3b of the wiper shaft 3 becomes unnecessary. Therefore, the structure can be simplified and the number of parts can be reduced, and the cost and weight can be reduced accordingly.

In addition, in the conventional case, there is a step or gap at the joint between the tip bearing portion provided on the bracket and the mirror holder 11, but in this embodiment, such a step or gap does not occur. . Therefore, the whole shape becomes clear and the appearance becomes excellent, and it is not necessary to consider the combination with the tip bearing portion provided on the bracket, so that the degree of freedom in design, design, etc. can be improved. it can.

Further, the tip 3b of the wiper shaft 3
Is provided on the mirror holder 11, the positional relationship between the wiper 2 and the mirror glass 1 is extremely high. Therefore, the wiping range of the wiper 2 and the pressing force of the wiper 2 become uniform, so that it is possible to always provide a constant and high quality outer mirror.

Further, since the mirror holder 11 is provided with the tip bearing portion 111, the clutch mechanism 7, the link mechanism 6 and the like can be temporarily fixed together with the wiper shaft 3 to the tip bearing portion 111, for example, during assembly. There is an advantage.

In the above embodiment, the truck mirror is shown as an example of the outer mirror, but it may be a door mirror or a fender mirror. Needless to say, the above-described vertical direction and horizontal direction change depending on the mounting direction of the outer mirror.

[0035]

According to the present invention, the tip bearing portion (11) for holding the tip portion (3b) of the wiper shaft (3).
Since 1) is provided on the mirror holder (11), the bracket conventionally used for holding the distal end portion (3b) of the wiper shaft (3) becomes unnecessary. Therefore, while simplifying the structure and reducing the number of parts,
Accordingly, cost and weight can be reduced.

In addition, in the conventional case, a step or a gap is formed at the joint portion between the front end bearing portion of the bracket and the mirror holder (11), but such a step or a gap is not generated in the present invention. Therefore, while the appearance is improved,
There is an advantage that the degree of freedom in design is also improved.

Further, since the mirror holder (11) is provided with the tip bearing (111) for holding the tip (3b) of the wiper shaft (3), the positional accuracy between the wiper 2 and the mirror glass 1 is extremely high. It will be improved.
Therefore, the wiping range of the wiper 2 and the pressing force of the wiper 2 are extremely constant without variation, so that a high quality outer mirror can always be provided.

Further, unlike the conventional case, the mirror glass (1) and the mirror holder (11) can be cut without being cut.
Since the movement of the wiper shaft (3) can be transmitted from the inside to the outside of the mirror glass (1), the workability can be greatly improved, and the cost can be further reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of an outer mirror shown as one embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part showing a link mechanism, a clutch mechanism and the like in the outer mirror.

FIG. 3 is a sectional view showing a clutch mechanism in the outer mirror.

FIG. 4 is an exploded perspective view of a main part of an outer mirror shown as a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mirror glass 11 Mirror holder 111 Tip bearing part 12 Holder base 2 Wiper 3 Wiper shaft 3a Base end part 3b Tip part 41 Bracket 411 Base end bearing part DM outer mirror

Claims (1)

[Claims] 1. A wiper (2) for wiping the surface of a mirror glass (1), a wiper shaft (3) for reciprocatingly rotating the wiper (2), and protecting the periphery and back of the mirror glass (1). A mirror holder (11), and a holder base (12) connected to the back of the mirror holder (11). The holder base (12) has a base end ( A bracket (41) having a proximal bearing (411) for rotatably holding 3a) is provided. The mirror holder (11) rotatably holds a distal end (3b) of a wiper shaft (3). An outer mirror provided with a tip bearing portion (111).