JP2001248357A - Waterproof and discharging structure of cable driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit a worm wheel gear section in a casing to be waterproof while attaining compactness of a cable driving device. SOLUTION: The casing 5 is formed with a drainage opening 13 and first and second drawing guides 10, 11 for drawing out a cable 7. A guide trough 16 is assembled into the opening section of the casing 5 leading to the drainage opening 13 from the first drawing guide 10 through the second drawing guide 11 to guide water invading from the first and second drawing guides 10, 11 toward the drainage opening 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a waterproof and drainage structure in a cable drive device used for a window regulator or the like of an automobile.

[0002]

2. Description of the Related Art In general, a cable drive device of this type includes a cable (e.g., a power window mounted on a vehicle) which is wound around a drum (reel) by rotation of a drum (reel) interlocked with motor drive. In some cases, the opening and closing of the window is automatically performed by moving up and down the operating portion connected to the window glass by feeding and winding the wire. As such a cable driving device, for example, a worm wheel that meshes with a worm that rotates with motor driving, a cable drum around which a cable is suspended, and a cable drum that is interlocked and connected to the worm wheel, and has a bottomed cylindrical shape, There is known a configuration including a bottomed cylindrical casing that houses a worm wheel on the side and a cable drum on the opening side, and a cover that closes the casing opening. By the way, in such a cable drive,
The cable may be exposed from the casing and become wet, and since the casing has a drawer for drawing out the cable, it is difficult to avoid infiltration of water into the casing. In the case of water flowing into the wheel side, water travels along the worm meshing with the worm wheel to cover the metal motor shaft on the electric motor side, or a damper interposed between the worm wheel and the cable drum. May be flooded. In such a case, the motor shaft may rust and generate abnormal noise, or the damper may be degraded, which may cause a failure or breakage. The drained water needs to be drained smoothly. Therefore, as shown in, for example, JP-A-56-97082 and JP-A-59-35579, the casing is divided into a part where the worm wheel is stored and a part where the cable drum is stored using a waterproof member. It is attempted to prevent water from entering the worm wheel side.However, in these devices, a partition member for dividing each portion in a watertight manner is necessary, and in the former, the outer periphery is required. A rubber partition member having a seal lip formed thereon is used, and the latter uses a partition wall member having an O-ring interposed on the inner periphery. For this reason, there is a problem that the number of parts increases or the configuration becomes complicated.In addition, with the driving of the cable driving device, the seal lip and the inner peripheral surface of the casing are different in the former, and in the latter, Since the O-ring and the outer periphery of the drive shaft are in sliding contact with each other, there is a problem that the sliding contact portion is rubbed and worn to reduce durability and to reduce efficiency due to sliding resistance. On the other hand,
As disclosed in Japanese Patent No. 7423, there has been proposed a case in which a gutter groove is formed inside a peripheral wall of a casing to communicate with a drain port (a drain hole), thereby making it possible to solve the above problem.

[0003]

However, this one is
A structure in which an inner cylinder is formed so as to be erected from the bottom of the casing on the inner side of the peripheral wall of the casing, and a space between the inner peripheral surface of the peripheral wall and the outer peripheral surface of the inner cylinder is used as a gutter to guide water that has entered into a drain port. It has become. However, when trying to accommodate a worm wheel that meshes with a worm that rotates with motor driving on the bottom side of the casing, the inner cylinder surrounds the outer periphery of the worm wheel in order to waterproof the worm wheel. In such a case, the casing peripheral wall is located on the outer diameter side with a space for further forming a gutter groove, so that the casing is inevitably increased in diameter, thereby preventing compactness. Furthermore, since the outlet is only formed at the corner between the casing bottom and the peripheral wall, it is necessary to give sufficient consideration to the intrusion of water from outside into the casing from here. However, it cannot be adopted as it is, and there is a problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention has been made to solve these problems, and is provided with a worm wheel that meshes with a worm that rotates with driving of a motor. And a cable drum in which the cable is suspended and operatively connected to the worm wheel, and a bottomed tubular casing having a bottomed tubular shape, and a bottomed tubular casing that houses the worm wheel on the bottom side and the cable drum on the opening side.
In a cable drive device including a cover that closes the casing opening, in forming a drawer guide for drawing a cable to the outside on the peripheral wall of the casing, and a drain port for discharging water in the casing to the outside, A guiding gutter for guiding water entering from the drawer guide to the drain port is incorporated in the casing at the casing opening side. By doing so, it is possible to prevent water from entering the worm wheel without increasing the size of the casing. In this case, the guide gutter according to the present invention may be configured such that a connecting piece portion that is fitted inside the guide hole of the drawer guide is integrally formed. Further, in this embodiment, the guide gutter of the present invention has a substantially U-shaped cross section opened on the same side as the casing opening, and is formed so that a bottom surface of the gutter extends from the casing peripheral wall position to a position overlapping the worm wheel on the casing opening side. It can be assumed that it is. In this case, the guide gutter of the present invention may have a gutter bottom formed in a ring shape facing the outer peripheral portion of the worm wheel. The present invention also has a worm wheel that meshes with a worm that rotates with a motor drive, a cable is suspended, a cable drum that is operatively connected to the worm wheel, and has a bottomed cylindrical shape.
In a cable drive device including a bottomed cylindrical casing that houses a worm wheel on the bottom side and a cable drum on the opening side, and a cover that closes the casing opening,
In forming a drawer guide for drawing out the cable to the outside of the casing peripheral wall and a drainage port for discharging water in the casing to the outside, at an end edge of the cable drum facing the worm wheel, A flange for projecting water adhering to the cable drum to the drain port side to prevent infiltration into the worm wheel side is formed so as to project outward in the outer diameter direction. By doing so, it is possible to prevent water that has entered the cable drum side from entering the worm wheel side. Furthermore, the present invention has a worm wheel that meshes with a worm that rotates with motor drive, a cable is suspended, a cable drum that is interlocked and connected to the worm wheel, and has a bottomed cylindrical shape.
In a cable drive device including a bottomed cylindrical casing that houses a worm wheel on the bottom side and a cable drum on the opening side, and a cover that closes the casing opening,
In forming a drawing guide for drawing out a cable to the outside of the casing peripheral wall and a drainage port for discharging water in the casing to the outside, the outer peripheral portion of the worm wheel on the cable drum side has an outer peripheral portion of the cable drum. It is assumed that a protruding portion is formed so as to face the portion,
In addition, the inner peripheral surface of the protruding portion is an inclined surface having a larger diameter toward the protruding tip. By doing so, it is possible to prevent water that has entered the cable drum side from entering the worm wheel side. In this case, a guide protrusion protruding toward the outer diameter side may be formed at the tip of the protrusion of the present invention. Further, in this case, a rib protruding on the inner diameter side and facing the guide projection on the bottom side of the casing can be provided on the peripheral wall of the casing of the present invention. In this case, the drawer guide of the present invention may have a drawer tip covered with a waterproof cap. Further, in these, the discharge port is formed in the casing, a lower side reaching the casing bottom side in a state where the casing opening side is closed by the cover, and an upper side set to have a length continuing from the casing bottom and overlapping the lower side. In this case, the upper side further includes a short casing peripheral wall which does not reach the position where the cover side edge of the casing peripheral wall is closed by the cover but overlaps the lower side. Can be configured.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to FIGS. In the drawings, reference numeral 1 denotes a cable driving device of a window regulator employed in a power window, and a motor case 2 (also used as a motor yoke) having a bottomed cylindrical shape, which constitutes the cable driving device 1, is illustrated. The armature shaft (motor shaft) 3 of the armature which is not rotatably supported,
A front bracket 4 is integrally fixed to an opening of the motor case 2. The front bracket 4 is integrally formed with a bottomed cylindrical casing 5 described later so as to be orthogonal to the armature shaft 3, and a worm wheel 6 and a cable 7 described later are suspended around the casing 5. And a cable drum 8 to be accommodated, and covered by a cover 9.

The casing 5 accommodates the worm wheel 6 on the bottom surface 5a in a rotatable state, and the distal end of the cylindrical peripheral wall 5b on the opening side is accommodated on the opening side as described later. And extends long so as to face the outer peripheral portion of the cable drum 8. A support shaft 5d projecting toward the opening side is integrally formed on the bottom surface 5a, and a window 5c is opened on the bottom surface 5a side of the peripheral wall 5b, and a tip of the motor shaft 3 is provided through the window 5c. The worm 3a engraved on the side is set so as to face the inside of the casing 5. Further, on the opening side of the casing peripheral wall 5b, a pair of first and second drawer guides 10 and 11 that are adjacent to each other in the circumferential direction and protrude to the outer diameter side while being separated from each other are integrally formed. A pair of cable end portions 7 drawn out from the cable drum 8 are attached to the second extraction guides 10 and 11.
a and 7b are arranged and drawn out. The first and second pull-out guides 10 and 11 are formed in a concave groove shape having a semicircular cross section, and a casing peripheral wall 5b serving as a base end of the first and second pull-out guides 10 and 11 is notched at an opening side portion. The first and second drawer guides 10 and 11 are in communication with the inside of the casing 5.

On the other hand, the worm wheel 6 has a gear portion 6a meshing with the worm 3a formed on the outer peripheral portion, and a boss portion 6b formed at an axial center position. The wheel 6 is rotatably accommodated in the casing 5 of the worm wheel 6 by rotatably supporting the boss 6b on a support shaft 5d of the casing bottom surface 5a. Furthermore, a fitting groove 6e recessed toward the other wheel surface (bottom wheel surface) 6d is formed on one wheel surface (opening wheel surface) 6c facing the opening side of the casing 5 of the worm wheel 6. They are formed at predetermined intervals around the axis. Further, the cable drum 8 is formed in a cylindrical shape having a smaller diameter than the worm wheel 6, and a cable groove 8 around which the cable 7 is spirally wound is formed on the outer peripheral surface.
a is formed. Further, a fitting hole 8b is formed in the shaft center of the cable drum 8 so as to be freely rotatable with respect to the casing support shaft 5d, and one surface of the cable drum 8 is opposed to the casing bottom surface 5a. Side face), a tongue piece 8c is formed so as to project into the worm wheel fitting groove 6e together with the damper 12. here,
The damper 12 is formed of a rubbery elastic material, and has a ring-shaped connecting portion 12a that fits over the outer periphery of the worm wheel boss portion 6b, and a damper body 12b that is integrally formed radially from the connecting portion 12a on the outer diameter side. Are formed.

Then, the worm wheel 6 and the damper 1
2. The cable drum 8 is opened from the opening of the casing 5.
The worm wheel 6 is attached to the boss 6 on the casing bottom surface 5a side.
c so as to fit into the casing support shaft 5d.
Subsequently, the connecting portion 12a of the damper 12 is fitted around the outer periphery of the worm wheel boss 6c, and the damper 12 is assembled so that the damper body 12b is fitted into the worm wheel fitting groove 6e. Beside
The cable drum 8 around which the cable 7 is suspended is set in the cable groove 8a. At this time, the cable drum 8 is fitted so that the fitting hole 8b is fitted to the casing support shaft 5d and the tongue piece 8c is adjacent to the damper body 12b fitted to the worm wheel fitting groove 6e. In this way, the cable drum 8 is integrated with the worm wheel 6 and the damper 12 is set so as to exhibit the damping function of the power transmission from the worm wheel 6 to the cable drum 8. ing. The pair of distal ends 7 a and 7 b of the cable 7 are set so as to be incorporated into the first and second pull-out guides 10 and 11 of the casing 5, respectively. The first and second drawer guides 10 and 1 are attached to a substantially disk-shaped cover 9 that covers the opening of the casing 5.
A pair of guide closing portions 9a that cover the opening 1 are integrally formed so as to protrude toward the outer diameter side, and a fitting for loosely fitting the distal end portion of the casing support shaft 5d to the center portion. The part 9b is integrally formed. The cable driving device 1 incorporated in this manner includes a pair of cable tip portions 7a, 7
b is pulled out of a guide hole formed by the pull-out guides 10 and 11 and the guide closing portion 9a, and the pulled-out cable end portions 7a and 7b are connected to the operation plate 7c of the window regulator.
When the worm wheel 6 rotates with the rotation of the armature shaft 3 and the cable drum 8 rotates integrally, for example, one cable tip 7a is extended, while the other cable tip 7b The operation plate 7c is forcibly moved up and down in such a manner as to be wound, whereby the window is opened and closed.

Next, a waterproof structure of the cable driving device 1 will be described. In the present embodiment, the cable driving device 1 is configured such that the cylindrical diameter direction of the casing 5 is the vertical direction (vertical direction) in the present embodiment.
And is mounted on the skeleton in a mounted state such that the cylinder axis direction is horizontal. In the attached state, a portion serving as a lower end portion of the casing peripheral wall 5b protrudes toward the outer diameter side, and the protruding portion serves as a drain port 13 for discharging water that has entered the casing 5. The inner peripheral surface of the projecting drain 13 has an inclined surface 13a which is inclined downward toward the opening, so that the water in the casing 5 is positively guided to the opening by the inclined surface 13a. Is set to

In the above-mentioned mounted state, the pair of first and second pull-out guides 10 and 11 of the casing 5 are provided.
In the first drawer guide 10, the leading end of the drawer faces diagonally upward, and the second drawer guide 11 has the leading end point diagonally downward.
An outer wire 14 is fitted to each of the cables 7 drawn from the first and second pull-out guides 10 and 11, respectively. The joint 15 is set so as to maintain a constant tension state by a joint 15 which is fitted to the portion via a spring 15a so as to be freely inserted and removed. Incidentally, the joint 15 has a cylindrical shape, and the inner cylindrical surface 15b for inserting the cable 8 is formed to have a larger diameter toward the inner side of the casing 5 so as to cope with a change in the position where the cable 8 is suspended around the cable drum 8. The cable 7 is set so as to absorb the displacement of the cable 7 in the feeding direction.

Further, in the present invention, the first drawer guide 1
A guide gutter 16 is internally installed at a position from the first through the second drawer guide 11 to the drain port 13.
Numeral 6 is set to be arranged in a space between the peripheral wall 5b on the opening side of the casing 5 and the outer periphery of the small diameter cable drum 7. Thereby, the first and second drawer guides 1
0, 11, in particular, water that has entered from the first drawer guide 10 facing upward is guided to the drain port 13 by the guide gutter 16 and discharged to the outside of the casing 5,
Thus, the first waterproofness is measured. The guide gutter 16 has a substantially U-shaped cross section in which the same side as the opening of the casing 5 is opened, and is incorporated such that the bottom surface portion 16a faces the casing bottom surface 5a. On both sides inside and outside the direction, inner diameter side leg pieces 16b erected toward the opening side of the casing 5 are provided.
And the outer diameter side leg piece 16c are integrally formed. further,
The upper end of the guide gutter 16 and the outer diameter side leg 16c are integrally formed with first and second connecting pieces 16d and 16e connected to the base ends of the first and second drawer guides 10 and 12, respectively. Have been.

On the other hand, the portions of the casing peripheral wall 5b opposed to the base ends of the first and second pull-out guides 10, 11 are formed in the notch 5e as described above, and the cable 8 is connected to the notch 5e. The notch 5e is notched so that the end face position on the opening side is slightly closer to the opening side than the position of the opening-side wheel surface 6c of the worm wheel 9. . Further, a first step portion 10a having a circumferential surface shape is formed at a base end of the first extraction guide 10 so as to form a gap at a predetermined interval between the base 15 and the outer periphery of the base end of the joint 15. The distal end of the first connecting piece 16 d of the guide gutter 16 is set in the gap. As a result, water entering along the inner cylindrical surface 15b of the joint 15 can be reliably guided to the bottom surface 16a side of the guide gutter 16. Further, a second step portion 10b is formed on the inner diameter side of the first step portion 10a of the first extraction guide 10, and the second step portion 10b
The step 16f formed between the first connecting piece 16d and the bottom surface 16a is set to abut. The end face formed by the second step portion 10b is continuous with the axial end face formed by the casing cutout portion 5e, where the outer diameter side portion of the guide gutter bottom face portion 16a is placed. It has become. The details of the connection between the second connecting portion 16e of the guiding gutter 16 and the second drawer guide 11 are omitted, but the first connecting portion 1 of the guiding gutter 16 is omitted.
It has the same configuration as the connection state between 6d and the first drawer guide 11. Furthermore, in the casing peripheral wall 5b, between the first and second drawer guides 10 and 11 formation site,
The inner peripheral surface located between the second drawer guide 11 and the drain port 13 is cut out to form a stepped surface portion 5f following the end surface formed by the cutout portion 5e. It is set so that the outer diameter side portion of the guide gutter bottom surface 16a is placed.

As described above, the guide gutter 16 is provided with the front end surfaces of the first and second connecting pieces 16d and 16e.
The first and second extraction guides 10 and 11 are inserted between the outer periphery of the proximal end of the joint 15 so as to abut against the first step 10a of the proximal end of the proximal end, and the outer diameter side portion of the bottom surface 16a is inserted into the casing step surface. 5f, and guide gutter outer diameter side leg piece 16
By setting so that c is in contact with the inner peripheral surface on the opening side of the casing peripheral wall 5e, the casing 5 is internally installed on the opening side of the casing 5. In this installed state, the guiding gutter 16
Is set so that the opening faces in the same direction as the opening of the casing 5, and the lower end of the guide gutter bottom 16 a faces the outlet 13 located at the lower end of the casing 5. Further, the inner diameter side portion of the guide gutter 16 is extended from the gear portion 6a of the worm wheel 6 to the inner diameter side, and is opposed to the opening side wheel surface 6c with a slight gap. In this way, the guide gutter 16 is incorporated so as to overlap the worm wheel 6 on the casing 5 opening side. As a result, the water that has entered along the inner cylindrical surface of the joint 15 flows into the guiding gutter 16 without flowing into the worm wheel 6, and follows the shape of the guiding gutter 16 from the lower end of the guiding gutter bottom surface 16 a to the drain port. 13
Thus, the first waterproofing against water intrusion into the worm wheel 6 is provided. Here, the axial length of the outer leg 16 c of the guide gutter 16 is determined to be the length reaching the casing opening edge, but the axial length of the inner leg 16 b is set to the cable drum 8. The length is set short so as not to disturb the operation of the hanging cable 7.

Further, in the present embodiment, water entering between the outer peripheral surface of the joint 15 and the inner peripheral surfaces of the first and second drawer guides 10 is supplied to the connecting piece 16 of the guide gutter 16.
The fluid flows into the connection between the joints 15 and 16e and the joint 15, and there is a possibility that water may enter the portion. Therefore, a waterproof cap 17 is covered (fitted) at the leading end of the first pulling-out guide 10 which faces upward, so that it is possible to prevent water from entering from the portion. A second waterproofing is in place.

In this case, a third waterproof measure against water adhering to and entering the cable 7 or flowing into the cable drum 8 is taken as follows.
That is, the water adhering to the cable 7 and penetrating tends to penetrate the worm wheel 6 side along the cable drum 8, but protrudes to the outer diameter side at the edge of the cable drum 8 facing the worm wheel 6. The flange 8d is integrally formed, so that water adhering to the cable drum 8 is guided downward along the flange 8d without being guided to the worm wheel side.

A projection 6f is formed on the outer periphery of the opening-side wheel surface 6c of the worm wheel 6 so as to overlap the outer periphery of the cable drum 8. The inner peripheral surface of the protruding portion 6f has an inclined surface 6g having a larger diameter toward the protruding tip.
And a guide projection 6h is formed integrally with the projection tip. Thereby, the water guided by the cable drum flange portion 8d is received by the inclined surface 6g, and is guided to the guide protrusion 6h side, and the guided water is dropped to the drain port 13 side. It is set to be.

Further, as described above, the inner diameter side portion of the guide gutter 16 overlaps the outer diameter portion of the worm wheel 6. Side part is the opening side wheel surface 6c
The width is widened to the inner diameter side of the protruding portion 6f formed at a position facing the inclined surface 6g. For this reason, if an unexpected situation occurs such that water overflows from the guiding gutter 16, the overflowing water may enter the cable drum 8 or the inclined surface 6 g of the opening-side wheel surface 6 c of the worm wheel 6. However, the infiltrated water is guided to the guide protrusion 6h side via the inclined surface 6g, and the casing peripheral wall 5
It is set so as to be guided to the discharge port 13 side via b.

In the present embodiment configured as described above, the worm wheel 6 of the cable driving device 1 is rotated by the rotation of the armature shaft 3 accompanying the driving of the motor, whereby the first and second extraction guides 10 and One end 7 of the cable 7 with the outer wire 14 pulled out from the cable 11
a is extended, the other end 7b is wound up, and the window is opened and closed. In this case, if a large amount of water is applied to the cable drive device 1, the first drawer that faces upwards. Water that is about to enter through a gap between the guide 10 and the joint 15 is second waterproofed by the waterproof cap 17. In addition, water that is about to enter from the inner cylindrical portion 15 and the like of the joint 15 flows into the guide gutter 16 side incorporated so as to be inserted into the outer periphery of the base end portion of the joint 16, and is guided to the bottom surface 16 a. The first waterproofing is achieved by being discharged from the drain 13. As a result, assuming that water has entered the casing 5 from the first and second extraction grooves 10 and 11, the water is prevented from being discharged from the drain port 13 side and flowing into the worm wheel 6 side. Problems such as rusting of the worm 3a and deterioration of the damper 12 can be reliably prevented.

Moreover, the water that has entered the cable drum 8 by adhering to the cable 7 or the like is infiltrated into the worm wheel 6 by the flange 8d formed at the end of the cable drum 8 on the worm wheel 6 side. Being regulated,
The water is guided downward by traveling along the flange portion 8d, and the guided water is guided to the guide protrusion 6h via the inclined surface 6g on the inner peripheral side of the protrusion 6f of the worm wheel 6, and As a result, water is discharged from the drain port 13 side, and the third waterproofing is performed, thereby preventing water from entering the worm wheel 6 side.

As described above, in the embodiment of the present invention, it is assumed that water has entered the casing 5 and the water is discharged from the drain port 13 and flows into the worm wheel 6 side. In this case, the casing is not waterproofed by dividing the cable drum accommodating portion and the worm wheel accommodating portion into separate rooms using a partition member as in the conventional case. A guide gutter 16 is internally mounted on the opening side, and a flange portion 8 d is provided on the cable drum 8.
f An inclined surface 6g is provided on the inner peripheral surface, and
As a result of forming each h, waterproofing is achieved, so that the assembling work can be simplified without increasing the number of parts. In addition, the guiding gutter 16 is mounted on the worm wheel 6.
By making the cable drum 8 smaller in diameter than the cable drum 8, the cable drum 8 is provided in a space formed between the outer periphery of the cable drum 8 and the peripheral wall 5 b on the casing 5 opening side.
The worm wheel 6 can be waterproofed without increasing the outer diameter of the worm wheel, thereby contributing to a reduction in weight and size. In addition, since there is no configuration in which the sealing material slides on a rotating member such as the worm wheel 6 or the cable drum 8 unlike the conventional one, there is no fear of wear and power loss, and the reliability and efficiency of the product are improved. Can be measured.

It should be noted that the present invention is not limited to the above-described embodiment, but may be applied to the following second and third embodiments. In the drawings, those common to the first embodiment (the same ones)
Are drawn with the same reference numerals, and details thereof are omitted. First, a second embodiment shown in FIG. 7 is a third structure for waterproofing, and in this case, the protrusion 6f of the worm wheel 6 is provided.
Is formed with a guiding projection 6i that protrudes in the outer diameter direction at the tip end. Also in this case, the water flowing from the inclined surface 6g of the protruding portion 6f flows through the guide protruding portion 6i to the peripheral wall 5b.
The stepped rib 5g that faces the guide projection 6i from the bottom surface 5a side of the casing 5 further projects on the inner peripheral side of the casing 5 on the inner peripheral side. It is formed integrally. In this way, the guide protrusion 6i and the step-shaped rib 5g form a labyrinth, and the water flowing from the worm wheel inclined surface 6g into the casing peripheral wall 5b via the guide protrusion 6i is closer to the worm wheel gear 6b. The effect of preventing infiltration into the body can be further enhanced. Incidentally, in the following third embodiment, any of the configurations of the first and second embodiments can be adopted as the third waterproof, and can be selectively used as necessary. .

Next, a third embodiment shown in FIGS. 8 and 9 will be described. In this case, the guide gutter 18 is not a local one from the first extraction guide 10 of the cable 7 to the drain 13 as in the first embodiment,
The outer diameter side leg piece 18c and the connection piece 18d are the same as those of the first embodiment except that the bottom portion 18a and the inner diameter side piece 18b are formed in a ring shape around the circumference.
18e. And this one,
The connecting pieces 18d and 18e are inserted into the base end of the joint 15 and set. The outer diameter portion of the bottom portion 18a is engaged with the stepped surface portion 5f formed on the casing peripheral wall 5b. Is set so as to overlap the outer diameter portion of the worm wheel 6 on the opening side of the casing 5 by setting the outer surface of the worm wheel 6 so as to face the outer diameter side portion of the wheel surface 6a with a gap. I have. At this time, the lower end edge of the guide gutter bottom surface 18a faces the drain port 13, and the first and second drawer guides 10,
It is set so that water entering from 11 is guided by the guiding gutter 18 and flows into the drain port 13 so that the first waterproofness can be measured. In this case, since it has a ring shape, the shape stability is excellent, and further, the stability when set in the casing 5 is excellent. Furthermore, the number of parts to be assembled is not increased, and the assembling work can be simplified.
The casing 5 can be made compact, and the reliability and efficiency of the product can be improved without fear of wear and power loss.

Further, the present invention can be implemented as in the fourth embodiment shown in FIGS.
This shows another embodiment of the discharge port. According to the fourth embodiment, the casing bottom surface 5a is attached to the indoor side door panel 20 so that the casing bottom surface 5a is opposed thereto. While avoiding water bouncing, additional considerations have been made. In other words, in the present embodiment, the casing is open on the bottom side, and a labyrinth structure is employed, so that consideration is given to effectively preventing water from entering from outside the vehicle. That is, a lower side 19a of the discharge port 19 is formed at a lower part of the cylindrical peripheral wall 5b of the casing 5 so as to protrude downward in the outer diameter direction in a state of continuing from the peripheral wall 5b in a continuous manner. The casing opening side edge continues from the opening end edge of the casing peripheral wall 5b without any step, and is closed by the lower extension 9a of the cover 9 together with the casing opening. On the other hand, the casing bottom side edge of the lower side 19a has a length extending to the axially intermediate position of the gear teeth 6a slightly offset from the casing bottom face 5a to the casing opening side. Further, the upper side 19b of the discharge port 19 does not reach a position corresponding to the lower part of the casing peripheral wall 5b that is bent from the casing bottom surface 5a to a position where the casing opening end side is closed by the cover 9, but the lower side 19a. Gear teeth 6a that overlap in the radial direction
And the casing peripheral wall 5b is formed in a short state in which the casing opening end side is cut out, whereby the discharge port 19 is vertically
The labyrinth structure in which a and 19b are overlapped is designed to prevent the rebound water from entering the casing 5. Moreover, the discharge port 19 thus configured
As a result, the upper and lower sides 19a and 19b have a labyrinth structure that overlaps each other at the position of the gear teeth 6a, so that it is possible to prevent splash water that tends to enter the gear teeth 6a through the discharge port 19 from splashing on the gear teeth 6a. Reference numeral 19c is a step formed outside the lower side 19a,
The step 19c is for caulking and fixing the lower extension 9a of the cover 9 for closing the casing opening.

[Brief description of the drawings]

FIG. 1 is a schematic diagram in which a wind regulator is connected to a cable driving device.

FIG. 2 is a partially sectional front view showing a state where a cover is removed from a cable driving device.

FIG. 3 is a sectional view taken along line AA of FIG. 2 with a cover attached.

FIG. 4 is a sectional view taken along line BB of FIG. 2 with a cover attached.

5 (A) and 5 (B) are a CC cross-sectional view in a state where a cover is attached to FIG. 2 and an enlarged cross-sectional view of a main part of FIG. 5 (A).

6 (A) and 6 (B) are perspective views of a guide gutter viewed from different viewpoints.

FIGS. 7A and 7B are a cross-sectional view and a main part enlarged cross-sectional view of a cable driving device according to a second embodiment.

FIG. 8 is a partial cross-sectional front view of a state where a cover is removed from a cable driving device according to a third embodiment.

FIG. 9 is a perspective view of a guide gutter according to a third embodiment.

FIG. 10 is a front view of a cable drive device according to a fourth embodiment with a cover partially cut away.

FIG. 11 is a front view of the casing of the embodiment.

FIG. 12 is a sectional view of the cable driving device taken along the line DD according to the embodiment;

FIG. 13 is a partially cutaway perspective view of the casing according to the embodiment as viewed from the bottom rear surface.

FIG. 14 is a partially cut-away perspective view of the casing according to the embodiment as viewed from an upper side saving surface.

FIG. 15 is an enlarged sectional view of a discharge port portion according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable drive device 3 Armature shaft 3a Worm 5 Casing 6 Worm wheel 6f Projection 6g Inclined surface 6h Guidance projection 7 Cable 8 Cable drum 8d Flange 9 Cover 10 First drawer guide 12 Damper 13 Drainage port 14 Outer cable 15 Joint 16 Guide gutter 16a Bottom part 16c Outer diameter side leg piece 16d First connection piece part 17 Waterproof cap 19 Outlet 19a Lower side 19b Upper side

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Nobuo Kobayashi 1-268, Hirosawa-cho, Kiryu-shi, Gunma F-term (reference) 2E052 AA09 CA06 DA03 DA08 DB03 DB08 EA14 EB01 EC01 KA10 KA13 KA15 KA16 KA17 LA08 3D127 AA12 BB01 CB05 CC05 DF04 DF09

Claims (11)

[Claims] 1. A worm wheel that meshes with a worm that rotates when driven by a motor, a cable drum around which a cable is suspended, and a cable drum that is connected to and linked to the worm wheel. In a cable drive device including a bottomed cylindrical casing that houses a cable drum on the side thereof and a cover that closes the casing opening, a drawer guide for drawing a cable to the outside around the casing peripheral wall, and water in the casing In forming a drainage port for discharging water to the outside, in a casing, a guide gutter for guiding water entering from the drawer guide to the drainage port is installed inside the casing opening side in a cable drive device. Waterproof, discharge structure. 2. The waterproof / discharge structure according to claim 1, wherein the guide gutter is integrally formed with a connecting piece part which is fitted in the guide hole of the drawer guide. 3. The guiding gutter according to claim 1 or 2,
Waterproofing of a cable drive device having a substantially U-shaped cross section with the same side as the casing opening and a gutter bottom being formed from the casing peripheral wall position to a position overlapping the worm wheel on the casing opening side,
Discharge structure. 4. The waterproof and discharge structure according to claim 3, wherein the guiding gutter has a gutter bottom formed in a ring shape facing the outer peripheral portion of the worm wheel. 5. A worm wheel that meshes with a worm that rotates in response to driving of a motor, a cable drum around which a cable is suspended, and a cable drum that is connected to and linked to the worm wheel. In a cable drive device including a bottomed cylindrical casing that houses a cable drum on the side thereof and a cover that closes the casing opening, a drawer guide for drawing a cable to the outside around the casing peripheral wall, and water in the casing When forming a drain port for discharging the water to the outside, the end of the cable drum facing the worm wheel is guided to the drain port side by the water attached to the cable drum to the worm wheel side. A waterproof and discharge structure in a cable drive device in which a flange portion for preventing intrusion is formed so as to protrude toward an outer radial direction. 6. A worm wheel that meshes with a worm that rotates in response to driving of a motor, a cable drum around which a cable is suspended, and a cable drum that is interlocked and connected to the worm wheel. In a cable drive device including a bottomed cylindrical casing that houses a cable drum on the side thereof and a cover that closes the casing opening, a drawer guide for drawing a cable to the outside around the casing peripheral wall, and water in the casing In forming a drain port for discharging the worm wheel to the outside, a projecting portion is formed on an outer peripheral portion of the worm wheel on the cable drum side so as to face the outer peripheral portion of the cable drum. The inner peripheral surface of the part has a slope with a larger diameter toward the tip end of the protrusion, which is a waterproof and discharge structure in a cable driving device. 7. The waterproof / discharge structure according to claim 6, wherein a guide protrusion protruding toward the outer diameter side is formed at a tip of the protrusion. 8. The waterproof / discharge structure according to claim 7, wherein the peripheral wall of the casing is provided with a rib protruding toward the inner diameter side and facing the guide projection on the bottom side of the casing. 9. The waterproof / discharge structure according to claim 1, 5 or 6, wherein the drawer guide has a waterproof cap covered at a leading end of the drawer. 10. The discharge port according to claim 1, 5 or 6, wherein the discharge port is formed in the casing, a lower side extending to the casing bottom side in a state where the casing opening side is closed by the cover, and continuing from the casing bottom side, and extending over the lower side. A waterproof and discharge structure in a cable drive device having an upper side set to a wrap length. 11. The cable according to claim 10, wherein the upper side is formed of a short casing peripheral wall that does not reach the position where the cover side edge of the casing peripheral wall is closed by the cover but overlaps the lower side. Waterproof and discharge structure in drive unit.