JPH052365Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a waterproof structure for a foldable vehicle mirror.

(Prior Art) Conventionally, in the case of foldable vehicle mirrors, a tilt adjustment mechanism consisting of a concave and convex portion is provided between a base member supported on the vehicle body side and a mirror body that can freely tilt in the longitudinal direction of the vehicle body. There is a device in which the tilting movement of the mirror body is adjusted by the tilting adjustment mechanism.

In such a folding vehicle mirror, when the mirror body is tilted, the engagement of the concave and convex portions is released, the mirror body is slightly moved upward with respect to the base member, and in this state, the vehicle body is tilted in the longitudinal direction.

(Problem to be solved by the invention) However, in such a folding vehicle mirror, when the mirror body moves slightly upward relative to the base member, negative pressure is generated between the mirror body and the base member.
For example, if water droplets adhere to the edges of the opposing surfaces between the base member and the mirror body during rainy weather, these water droplets will enter between the mirror body and the base member due to negative pressure.
Once this water has entered, it does not easily come out, and may further enter the interior due to the pressure caused by the downward movement of the mirror body.

Therefore, there has been a desire for a collapsible vehicle mirror that can prevent water from entering between the base member and the mirror body, and can quickly drain water if it does.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention includes a base member 1 supported on the vehicle body side, and a mirror body attached to the base member 1 and tiltable in the longitudinal direction of the vehicle body. 19, the base member 1 and the mirror body 1
Consisting of uneven parts 1c and 12 provided between 9,
A folding door mirror comprising a tilting adjustment mechanism 8 for adjusting the tilting movement of the mirror body 19 is characterized in that a through hole 1f is formed in a portion of the base member 1 facing the mirror body 19.

(Function) Since the through hole is formed in the part of the base member facing the mirror body, even if the mirror body moves upward with respect to the base member, air can be aired from the outside between the base member and the mirror body through the through hole. This allows the negative pressure generated between the base member and the mirror body to be reduced, thereby preventing water from entering between the base member and the mirror body. Furthermore, even if water should enter between the base member and the mirror body, this water can be quickly discharged to the outside through the through hole, thereby providing a highly durable foldable vehicle mirror. can.

(Embodiment) A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partially cutaway front view of the foldable vehicle mirror, FIG. 2 is a plan view of the same, FIG. 3 is an enlarged sectional view of the same main part, and FIG. 4 is an exploded view of the main part.

In the figure, reference numeral 1 denotes a base member that is fixedly supported on the vehicle body side, and the lower end of a cylindrical fixed shaft 3 is integrally provided in the central step 1a of the base member 1. Further, a plurality of engagement grooves 1c are formed radially on the upper surface of the central step portion 1a, and engagement grooves 1d having a shallower groove depth than the engagement grooves 1c are formed between the engagement grooves 1c. do. Further, the central step portion 1 on the upper surface of the base member 1
Protrusions 1e that engage with grooves 5c formed in the bracket 5, which will be described later, are provided at appropriate locations around the base member 1.
Formed integrally with

A base portion 5a of a bracket 5 is rotatably fitted onto the fixed shaft 3, and a mirror drive unit 7 is fixed to a support surface portion 5d of the bracket 5 as shown in FIGS. 1 and 2. A mirror holder 9 is attached to the unit 7 so as to be able to tilt vertically and horizontally with respect to the bracket 5 (detailed structure is not shown as these are known techniques), and the mirror 10 is held by the mirror holder 9. A mirror body 19 is constructed by surrounding the bracket 5, unit 7, mirror holder 9, mirror 10, etc. with a mirror housing 11 supported by the bracket 5.

In this embodiment, the support surface portion 5d is provided integrally with the bracket 5, but the support surface portion 5d may be provided separately.

A plurality of engagement holes 5b corresponding to the engagement grooves 1c are formed on the lower surface of the base 5a of the bracket 5,
A steel ball 12 is fitted into the engagement hole 5b. This steel ball 1
2 protrudes downward from the engagement hole 5b, and this protrusion engages with the engagement groove 1c. These steel balls 12, engagement grooves 1c, etc. constitute a tilt adjustment mechanism 8. Since the bracket base 5a is pressed downward by a spring 13 provided on the outer periphery of the fixed shaft 3, the engagement between the steel ball 12 and the engagement groove 1c is maintained at a predetermined strength. Therefore, in a normal state, the steel ball 12 engages with the engagement groove 1c, and this engagement is maintained with a predetermined strength by the spring 13, so that the bracket 5 is positioned and supported with respect to the base member 1. However, if a force greater than a predetermined value is applied from the front or rear to the mirror body 19, that is, the bracket 5, the steel ball 12 will move against the spring 1.
3, the bracket 5 separates from the engagement groove 1c and slides on the upper surface of the base member 1 (in this state, the bracket 5 moves upward by the amount by which the steel ball 12 protrudes),
It engages with the next engagement groove 1d, and the mirror body 19 rotates about the fixed shaft 3 by this amount.

Reference numeral 5c denotes a substantially C-shaped groove in plan view formed on the lower surface of the bracket base 5a, and the protruding piece 1e of the base member 1 engages with the groove 5c, and the protruding piece 1e abuts the end of the groove 5c. This prevents the bracket 5, that is, the mirror body 19, from tilting forward or backward by more than a predetermined angle.

In the above, the bracket base 5 of the base member 1
A plurality of through holes 1f are formed in the portion facing a,
In this embodiment, the through holes 1f are formed at locations corresponding to the grooves 5c.

On the other hand, a gear case 14 is joined to the upper surface of the base portion 5a of the bracket 5. The gear case 14 is formed with a flange portion 14a extending in the horizontal direction and flange portions 14b, 14b extending in the vertical direction, and by tightening these to the bracket 5 with screws 15, the gear case 14 is fixed to the bracket 5 from both horizontal and vertical directions,
Therefore, its mounting strength is greatly strengthened. Incidentally, this gear case 14 also has a function as a reinforcing member for the bracket 5.

A base plate 16 is fixed to the upper end of the gear case 14, and a motor 18 is arranged on the base plate 16. The motor 18 is attached to a mounting wall 16a integrally projecting upward from the upper surface of the base plate 16 with screws 17. ，
17. A thermistor 20 for preventing overcurrent to the motor 18 is fixed to the upper surface of the motor 18, and the thermistor 20 is covered with a sponge rubber 22 to protect it.

24 are these motor 18, thermistor 20
This is a motor cover that covers the

A rotation shaft 24 is provided on the base plate 16, and rotation shafts 26, 2 are provided between the base plate 16 and the gear case 14.
8, and a rotating shaft 30 is rotatably attached to the bearing 14c at the bottom of the gear case 14. An output shaft 18a of the motor 18 is attached to the upper end of the rotation shaft 24.
A worm wheel 34 is fixed to mesh with the worm 32 fixed to the shaft, and a gear 3 is attached to the lower end of the rotating shaft 24.
Fix 6. Further, the rotation shaft 28 is provided with the gear 36.
A gear 38 that meshes with the gear 38, a gear 40 that rotates together with the gear 38, and a separate gear 41 below this gear 40.
A gear 42 that rotates together with this gear 41 is provided, and a gear 44 that meshes with the gear 40 and a gear 46 that rotates together with the gear 44 and meshes with the gear 41 are provided on the rotating shaft 26. . Further, a gear 48 that meshes with the gear 42 is fixed to the upper end of the rotating shaft 30, and a rotating gear 50 is fixed to the lower end of the rotating shaft 30.
to fix.

These gears 36, 38, 40, 44, 46, 4
1, 42, 48, etc. constitute a reduction gear 52, and these reduction gears 52 are disposed within the gear case 14 and are protected.

In this embodiment, the gear 36 and the gear case 14
In addition, between gears 40 and 41, gear case 14, gear 4
Washers 54 and 5 are installed between gear case 14 and gear 42, between gear case 14 and gear 48, and between gear case 14 and gear 48, respectively.
5, 56, 57, and 58 are interposed to achieve a noise reduction effect during gear rotation.

On the other hand, a groove 3 is formed on the outer periphery of the small diameter portion 3b of the fixed shaft 3.
a, and the inner periphery of the engagement ring 60 is keyed to the groove 3a to attach the engagement ring 60 non-rotatably to the fixed shaft 3.
A guide gear 6 that meshes with the rotary gear 50 is provided below.
2 is rotatably fitted to the fixed shaft 3, and a washer 63 is disposed below the guide gear 62 to abut against the upper end of the spring 13. Further, a circumferential groove 3c is provided above the engagement ring 60 of the fixed shaft 3.
Fit the circlip 61 to the spring 13
The upper limit position of the engagement ring 60, which is urged upward by the elasticity of the engagement ring 60, is restricted.

As shown in FIG. 5, the washer 63 has a two-layer structure made of stainless steel 63a and Teflon 63b.

A plurality of engagement holes 62a are formed on the upper surface of the guide gear 62, and steel balls 66 are fitted into the engagement holes 62a. A portion of the steel ball 66 projects upward from the engagement hole 62a, and this projecting portion engages with a plurality of engagement grooves 60a formed on the lower surface of the engagement ring 60.
(The number of engagement grooves 60a... is a multiple of the number of engagement holes 62a...) Since the guide gear 62 is pressed upward by the elasticity of the spring 13, the engagement grooves 60a... The engagement with the guide gear 60a is maintained at a predetermined strength, so that the guide gear 62 does not rotate under normal conditions and is fixed.

Therefore, when the motor 18 is operated by operating a switch in the vehicle interior, the worm 32 rotates, and this rotation is transmitted to the rotating gear 50 via the worm wheel 34 and the reduction gear 52.
Since the guide gear 62 that meshes with 0 is fixed, the rotary gear 50 rotates and the guide gear 62
The rotating shaft 30 of the rotating gear 50 is supported by the gear case 14, and the gear case 14 is fixed to the bracket 5.
The rotation of the rotating gear 50 causes the bracket 5 to tilt backward or forward, thereby causing the mirror body 19 to tilt.
A tilting movement is performed.

By the way, if the mirror body 19 hits an obstacle during the tilting operation and the tilting stops, that is, if the rotation of the rotating gear 50 stops, the motor 18 will still continue to operate, and if this happens for a long time. If this continues, the motor 18 will be under a high load for a long time, which may have an adverse effect, but in this embodiment, in such a case, rotational force is applied to the guide gear 62 due to the rotation of the rotary gear 50, and this causes the steel to rotate. Ball 6
6 is an engagement groove 60a against the elasticity of the spring 13.
The guide gear 62 begins to rotate around the fixed shaft 3, thereby preventing the motor 18 from being adversely affected. Further, according to such a structure, even when force is applied to the mirror body 19 from the front or rear to forcibly tilt the mirror body 19, it is possible to prevent a high load from being applied to the motor 18.

Next, a tilting control mechanism 70 for the mirror body 19 is disposed at the upper end of the fixed shaft 3. The mechanism 70 is a substrate 7
1. Consists of a cylindrical body 72, cam switches 75, 76, etc., and the cylindrical body 72 has a hole 70 bored in a substrate 71.
a, and its lower part 72a
is fitted and fixed to the outer periphery of the upper end of the fixed shaft 3. At this time, the protrusion 72b integrally formed on the cylindrical body 72 is inserted into the gap 61c between the ends of the left and right pieces 61a and 61b of the circlip 61, and the claw portion formed at the tip of the protrusion 72b is inserted into the circumferential groove 3c. At the same time, an engaging surface 72g formed on the lower inner periphery 72a of the cylinder engages with a receiving surface 3g formed on the upper part of the fixed shaft 3, whereby the cylinder 72 is securely fixed to the fixed shaft 3. be done.

FIG. 6 is a view of the tilting control mechanism 70 viewed from below.As shown in this figure, the substrate 71 has a substantially rectangular shape, and the three orthogonal sides 71a of the substrate 71,
71b, 71e have a shape that follows the wall surface of the gear case 14, and the three sides 71a, 71b, 71e are in contact with the wall surface of the gear case 14, respectively, so that the board 7
1 is fixed with respect to the rotational direction of the gear case 14. On the other hand, since the cylindrical body 72 is fixed to the fixed shaft 3, when the mirror body 19 tilts, the substrate 71
Due to the above-mentioned upward movement of the bracket 5, the bracket rotates with respect to the cylinder body 72 together with the gear case 14 while sliding downward relative to the wall surface of the gear case 14.

Note that 71c and 71d are slits formed on the sides, and these slits 71c and 72d are for gear case 14.
It engages with a pin formed on the holder to ensure accurate positioning after assembly. Also, 71e is a notch,
This is to prevent the rotary gear 50 from coming into contact with the substrate 71 during assembly.

A cam edge 73 consisting of a small diameter portion 73a and a large diameter portion 73b is formed on the outer periphery of the portion of the cylinder body 72 below the base plate 71, and the cam switches 75 and 76 are arranged on both sides of the cylinder body 72 on the lower surface of the base plate 71. do.

The cam switch 75 has a fixed contact 75c and a movable contact 75d at the tips of pieces 75a and 75b, and
Contact portions 75e and 75f are attached to intermediate portions of 5a and 75b, respectively, and when the substrate 71 rotates in the direction A in the figure with respect to the fixed shaft 3, that is, the cylindrical body 72, the contact portions 7
5f, the contact is transferred from the large diameter portion 73b to the small diameter portion 73a, and this contact transfer causes the piece 75a to connect to the cylinder 72.
The movable contact 75d is separated from the fixed contact 75c, and the switch is turned off. Further, from this state, by rotating in the opposite direction, that is, by rotating the substrate 71 in the direction B, the contact portion 75f shifts its contact point from the small diameter portion 73a to the large diameter portion 73b, and the movable contact 75d changes to the fixed contact 75c.
When it comes into contact with the switch, the switch turns on. Similarly, the cam switch 76 has pieces 76a, 76b and a fixed contact 76.
c, a movable contact 76d, and contact portions 76e and 76f, which function in the same manner.

These cam switches 75 and 76 are used to stop the tilting of the mirror body 19, and for example, to activate the switch in the vehicle interior from the state shown in FIG. 6 (in this state, the mirror body 19 is assumed to be in the use position). The mirror body 19 is tilted and the substrate 7 is
1 is rotated in the direction A, the cam switch 75 is turned off as described above by rotation at a predetermined angle, and the mirror body 19 is stopped at the tilted position. (In this state, the cam switch 76 is on.) Conversely, if the switch inside the vehicle is operated from this state, the mirror body 19 starts tilting in the opposite direction, and the base plate 71 rotates in the direction B. Then, the cam switch 76 is turned off, and the mirror body 19 stops at the use position.

The diodes 78 and 79 are connected to the cam switch 7 while the substrate 71 is rotating.
Since both switches 5 and 76 are turned on, diodes 78 and 79 are provided in the circuit to cut off the current of one of the switches. In this embodiment, diodes 78 and 79 are mounted on the substrate 71.

Further, 80 is the aforementioned cylinder body 72, switch 75,
76, the diode 78, etc., and in this embodiment, a transparent resin material was used.

Incidentally, the tilt control mechanism 70 includes a substrate 71, a cylinder 72, cam switches 75 and 76, and a diode 7.
8 and 79 are integrally attached, and by fitting and fixing the cylindrical lower part 72a to the upper part of the fixed shaft 3, this unitized tilting control mechanism 70 can be integrally attached to the fixed shaft 3. As a result, assembly can be facilitated and assembly accuracy can be improved.

Incidentally, such a tilting control mechanism 70 is configured in advance with respect to the fixed shaft 3.
After that, the gear case 14 is assembled toward the bracket 5.

On the other hand, in this embodiment, the substrate 71 of the gear case 14
A stopper piece 81 is provided to protrude downward at the upper portion to prevent the board 71 from tilting upward.

Note that 95 is a harness for driving the mirror holder 9.

By the way, in the foldable vehicle mirror constructed as above, when the steel ball 12 separates from the engagement groove 5c and the bracket base 5a moves slightly upward with respect to the base member 1 when the mirror body 19 is tilted, the base member 1 and A negative pressure is generated between the bracket base 5a, and the base member 1 and the bracket base 5 are
If a water droplet W is attached to the edge of the surface facing a,
This water droplet enters the inside through the gap between the base member 1 and the bracket base 5a due to the negative pressure.

However, in the present invention, a plurality of through holes 1f are formed in the portion of the base member 1 facing the bracket base 5a, so even if the bracket base 5a moves upward relative to the base member 1, the base member 1 Air enters between the bracket base 5a and the bracket base 5a from the outside through the through holes 1f, which reduces the negative pressure generated between the base member 1 and the bracket base 5a, and causes the bracket base 5a and the base to Water can be prevented from entering between the members 1.

Furthermore, even if water should infiltrate between the bracket base 5a and the base member 1, this water will be discharged to the outside through the through holes 1f, and will no longer intrude into the interior. In particular, this effect is even more remarkable when the groove 5c is formed on the lower surface of the bracket base 5a, as in this embodiment, and the structure is such that water tends to accumulate therein.

In this way, water does not enter between the base member 1 and the bracket base 5a, and even if water does enter, it is quickly discharged to the outside through the through hole 1f, thereby improving the durability of the foldable vehicle mirror. be able to.

(Effects of the invention) As described above, according to the invention, since the through hole is formed in the portion of the base member facing the mirror body, it is possible to prevent water from entering between the base member and the mirror body. Further, even if water should enter during this period, it can be quickly discharged to the outside through the through hole, and as a result, a highly durable folding vehicle mirror can be obtained.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of the foldable vehicle mirror, Figure 2 is a plan view of the same, Figure 3 is an enlarged cross-sectional view of the same main part, Figure 4 is an exploded view of the same main part, and Figure 5 is a partially cutaway front view of the foldable vehicle mirror. The figure is a partially enlarged sectional view of the washer, and FIG. 6 is a view of the tilting control mechanism viewed from below. In the drawings, 1 is a base member, 1f is a through hole, and 8
is the tilt adjustment mechanism, 19 is the mirror body, 1c, 12
is an uneven portion.

Claims (1)

[Claims for Utility Model Registration] A base member supported on the vehicle body side, a mirror body attached to the base member and tiltable in the longitudinal direction of the vehicle body, and an uneven portion provided between the base member and the mirror body. and a tilting adjustment mechanism for adjusting the tilting movement of the mirror body, characterized in that a through hole is formed in a portion of the base member facing the mirror body. Waterproof structure for vehicle mirrors.