JP2007016473A - Drum structure of wire type window regulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum structure of a wire type window regulator capable of mechanically reducing a lifting speed in a top dead center part and a bottom dead center part of a window panel without changing a rotating speed of a driving means. <P>SOLUTION: A spiral groove part 16 for winding a wire 17 for lifting the window panel is formed on the outer periphery of a drum 14. By forming a diameter D1 of a top dead center corresponding part 14a arranged on one end side in the axial direction of the drum 14 and a diameter D2 of a bottom dead center corresponding part 14b arranged on the other end side smaller than a diameter DO of an intermediate part 14c corresponding to the middle of a stroke when lifting the window panel, a rewinding speed and a winding speed are reduced in the top dead center corresponding part 14a and the bottom dead center corresponding part 14b, furthermore, a bottom hitting sound can be reduced in full closure and full opening by reducing the lifting speed of the window panel. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drum structure of a wire type window regulator that lifts and lowers a window panel that opens and closes a window via a wire wound around a drum that rotates forward and backward.

  A window panel that closes a window of an automobile is opened and closed by a window regulator. However, in a so-called so-called power window that drives a window regulator by a motor that is a driving means, the motor rotates forward and backward by the motor. The window panel is moved up and down via a wire wound around a drum (see, for example, Patent Document 1).

In other words, a wire is wound around a part of a spiral groove formed on the outer periphery of the drum, and when the drum is rotated, the winding portion of the wire moves in the axial direction of the drum and the one end side of the wire is rewound. While winding the other end side, connecting both ends to be rewound and wound to the carrier plate fixed to the window panel, by guiding the carrier plate along the guide rail arranged in the vertical direction, The window panel is driven up and down.
Japanese Patent Laid-Open No. 3334474 (page 3, FIG. 1)

  However, in such a conventional wire-type window regulator, the outer peripheral diameter of the drum having a spiral groove formed on the outer periphery is the full width in the axial direction of the drum, that is, the other end from the top dead center corresponding portion arranged on one end side in the axial direction of the drum. It is constant over the bottom dead center corresponding part arranged on the side.

  Therefore, the rewinding / winding speed of the wire becomes constant with respect to the rotation of the motor, and as a result, the window panel is lifted and lowered at a constant speed with its full stroke, and is fully closed and fully opened.

  For this reason, since the raising / lowering speed at the top dead center and the bottom dead center of the window panel is fully closed and fully opened without being decelerated, the bottoming sound at the time of fully closed and fully opened becomes large.

  Therefore, in order to decelerate the raising / lowering speed at the top dead center and the bottom dead center of the window panel, it is necessary to change the rotational speed of the motor itself that rotationally drives the drum.

  However, when trying to change the rotational speed of the motor in this way, a roaring sound resulting from the rotational speed change becomes annoying. In addition, it is necessary to monitor the top dead center and bottom dead center of the window panel in order to determine the position at which the rotational speed of the motor is changed. For this purpose, a position sensor is provided or a rotational speed control circuit is provided. Cost becomes high.

  Therefore, the present invention provides a drum structure of a wire type window regulator that can mechanically reduce the ascending / descending speed at the top dead center portion and the bottom dead center portion of the window panel without changing the rotational speed of the driving means. To do.

  A window regulator to which the present invention is applied includes a drum that has a spiral groove formed on the outer periphery thereof and is rotated forward / reversely by a driving means, and is wound around a part of the spiral groove and has one end side of the window panel. A wire connected to the ascending side and having the other end connected to the descending side of the window panel, and as the drum rotates, the winding portion of the wire causes the spiral groove to pass through the shaft of the drum. The drum is fully closed and fully opened by moving up and down the window panel while moving from a top dead center corresponding part arranged at one end in the direction to a bottom dead center corresponding part arranged at the other end. The main feature is that the diameter of the upper dead center corresponding portion and the diameter of the lower dead center corresponding portion are smaller than the diameter of the intermediate portion corresponding to the middle of the stroke when the window panel is raised and lowered.

  According to the present invention, one end of a wire wound around a spiral groove formed on the outer periphery of the drum by forward and reverse rotation of the drum is rewound from the drum, and the other end is wound around the drum. When the window panel is moved up and down while the window panel approaches the top dead center or the bottom dead center, the winding portion of the wire is located at the top dead center corresponding portion or the bottom dead center corresponding portion of the drum.

  At this time, since the drum diameters of the top dead center corresponding portion and the bottom dead center corresponding portion are smaller than the drum diameter of the intermediate portion, the wire is rewound at the top dead center corresponding portion and the bottom dead center corresponding portion. The speed and the winding speed are reduced, and as a result, the lifting / lowering speed of the window panel can be reduced.

  Therefore, not only can the bottom noise when the window panel is fully closed and fully opened be reduced, but the rotation speed of the drive means can be constant at all times, so that it is possible to suppress the generation of beat noise and to prevent noise and control the rotation speed. A circuit becomes unnecessary, and it is not necessary to electrically monitor the raising / lowering position of the window panel, so that the cost can be kept low.

  In addition, because the drum has a small diameter at the top dead center and bottom dead center parts, the winding force of the wire increases, and the reduction in gear ratio near the top dead center of the window panel is compensated to drive a small torque. Even if it is a means, sufficient surplus margin can be ensured.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 4 show a first embodiment of a wire type window regulator to which the drum structure of the present invention is applied, and FIG. 1 is an overall configuration diagram showing a state in which the wire type window regulator is attached to a door of an automobile. Is an enlarged sectional view of the drum, FIG. 3 is an enlarged side view of a state where a wire is wound around the drum, and FIG. 4 is an enlarged sectional view showing a wire length absorbing means.

  As shown in FIG. 1, the wire type window regulator 10 of the present embodiment is attached to the inside of a door 1 of an automobile, and opens and closes a window portion 3 by raising and lowering a window glass 2 as a window panel. The wire type window regulator 10 of this embodiment forms a power window by using a motor 11 as a drive means as a drive source.

  As shown in FIG. 1, the wire type window regulator 10 includes a base plate 12 fixed to the door 1 side and a guide rail 13, and a drum 14 shown in FIGS. 14 is rotated forward / reversely by the motor 11.

  As shown in FIG. 1, the guide rail 13 is vertically arranged at a substantially central portion in the front-rear direction of the door 1, and the carrier plate 15 coupled to the lower portion of the window glass 2 is moved up and down along the guide rail 13. The window glass 2 is guided up and down.

  A spiral groove 16 is formed on the outer periphery of the drum 14 as shown in FIG. 2, and one end side of the wire 17 wound around a part of the groove 16 is connected to the rising side of the window glass 2 and the other. The end side is connected to the descending side of the window glass 2.

  That is, one end side of the wire 17, that is, the side fed out from the upper side of the base plate 12 as shown in FIG. 1 is connected to the carrier plate 15 from the upper end portion of the guide rail 13, while the other end of the wire 17. The side, that is, the side extended from the lower side of the base plate 12 is connected to the carrier plate 15 from the lower end portion of the guide rail 13.

  At this time, the portion where the wire 17 extends from the base plate 12 to the upper and lower ends of the guide rail 13 is covered with the outer tube 18 as shown in FIG.

  The wire 17 wound around the drum 14 is arranged on the other end side from the top dead center corresponding portion 14 a arranged on the one end side in the axial direction of the drum 14 with the spiral groove 16 as the drum 14 rotates. The window glass 2 is moved up and down to fully close and fully open while moving to the bottom dead center corresponding portion 14b.

  That is, in this embodiment, the wire 17 is wound once around the spiral groove portion 16, and the drum 14 is rotated in this state, so that the winding portion of the wire 17 follows the spiral shape of the groove portion 16. When the drum 14 moves in the axial direction and the winding portion moves to the top dead center corresponding portion 14a, the window glass 2 rises and the window portion 3 is fully closed. At the time of moving to the bottom dead center corresponding portion 14b, the window glass 2 is lowered and the window portion 3 is fully opened.

  Here, in the present invention, as shown in FIG. 2, the diameter D1 of the top dead center corresponding portion 14a and the diameter D2 of the bottom dead center corresponding portion 14b of the drum 14 are set to intermediate portions corresponding to the middle of the stroke when the window glass 2 is raised and lowered. It is smaller than the diameter D0 of 14c.

  At this time, the diameter D1 of the top dead center corresponding portion 14a and the diameter D2 of the bottom dead center corresponding portion 16b are made equal.

  Further, as shown in FIG. 2, the drum 14 smoothly connects the top dead center corresponding portion 14a, the bottom dead center corresponding portion 14b, and the intermediate portion 14c by a curved surface 14d (or an inclined surface).

  By the way, in the present embodiment, the upper dead center corresponding portion 14a and the lower dead center corresponding portion 14b of the drum 14 have a small diameter, so that when the winding portion of the wire 17 is located in the small diameter portion, the outer diameter from the drum 14 is increased. The length of the wire 17 fed out to the tube 18 changes.

  Therefore, in the portion where the wire 17 is fed out from the drum 14, more specifically, in the connection portion between the base plate 12 and the outer tube 18 indicated by A and B in FIG. 1, the top dead center corresponding portion 14a and the bottom dead center as shown in FIG. An extender mechanism 20 is provided as a length absorbing means that absorbs a change in the feed amount of the wire 17 due to a difference in diameter between the corresponding portion 14b and the intermediate portion 14c.

  The extension mechanism 20 includes a plug 21 that connects the outer tube 18 to the base plate 12 and a spring 22 disposed in the plug 21, and the end of the outer tube 18 is slid into the large-diameter hole 21 a of the plug 21. The spring 22 is contracted between the bottom 21b of the large-diameter hole 21a and the insertion end 18a of the outer tube 18 while being inserted movably.

  Of course, the length of the large-diameter hole 21a is formed to be long enough to absorb the change in the feed amount of the wire 17.

  Therefore, in the extension mechanism 20, when the winding portion of the wire 17 is positioned at the intermediate portion 14 c of the drum 14, the feeding amount of the wire 17 is reduced, so that the outer tube 18 greatly shrinks the spring 22 and the large-diameter hole. While the amount of insertion into the wire 21a increases, the amount of wire 17 fed out increases when the winding portion of the wire 17 is positioned at the top dead center corresponding portion 14a or the bottom dead center corresponding portion 14b having a small diameter. The outer tube 18 moves in a direction in which the insertion amount into the large-diameter hole 21a is reduced by the urging force of 22, so that the tension state of the wire 17 is always maintained.

  According to the drum structure of the wire type window regulator of the present embodiment having the above configuration, the wire 17 wound around the spiral groove 16 formed on the outer periphery of the drum 14 by forward / reverse rotation of the drum 14 has one end thereof. Is unwound from the drum 14, the other end is wound around the drum 14, and the window glass 2 is moved up and down, and when the window glass 2 approaches the top dead center at which the window glass 2 is fully closed or the bottom dead center at which the window glass 2 is fully opened. The winding portion of the wire 17 is located at the top dead center corresponding portion 14a or the bottom dead center corresponding portion 14b of the drum 14.

  At this time, since the drum diameters D1 and D2 of the top dead center corresponding portion 14a and the bottom dead center corresponding portion 14b are smaller than the drum diameter D0 of the intermediate portion 14c, the top dead center corresponding portion 14a and the bottom dead center corresponding portion 14a. The unwinding speed and the winding speed of the wire 17 at the point corresponding portion 14b are reduced, and as a result, the ascending / descending speed of the window glass 2 can be reduced.

  Therefore, the bottomed sound when the window glass 2 is fully closed and fully opened can be reduced.

  Moreover, since the raising / lowering speed of the window glass 2 can be changed by the diameter change of the drum 14, the rotation speed of the motor 11 may always be constant, and therefore, the beat when the rotation speed (rotation speed) of the motor 11 is changed. Sound generation can be suppressed.

  Further, by making the rotation speed of the motor 11 constant, noise countermeasures and a rotation speed control circuit are not required, and it is not necessary to electrically monitor the raising / lowering position of the window glass 2, thereby reducing the cost. .

  Furthermore, in the top dead center corresponding portion 14a and the bottom dead center corresponding portion 14b, the drum 14 has a small diameter, so that the winding force of the wire 17 is increased, and the reduction in the gear ratio near the top dead center of the window glass 2 is compensated. Thus, even with the motor 11 having a small torque, a sufficient ascending margin can be secured, and as a result, the window regulator 10 can be downsized.

  Further, in this embodiment, the diameter D1 of the top dead center corresponding portion 14a and the diameter D2 of the bottom dead center corresponding portion 16b are made equal, so that the rising speed when the window glass 2 is fully closed and the lowering when the window glass 2 is fully opened. Since the speed can be made equal, the uncomfortable feeling when opening and closing the window 3 with the window glass 2 can be eliminated.

  Further, since the drum 14 smoothly connects the top dead center corresponding portion 16a, the bottom dead center corresponding portion 16b, and the intermediate portion 16c by the curved surface 16d, the winding portion of the wire 17 is connected to the top dead center from the intermediate portion 16c. When moving to the corresponding portion 16a or the bottom dead center corresponding portion 16b, or when moving from the top dead center corresponding portion 16a or the bottom dead center corresponding portion 16b to the intermediate portion 16c, the wire 17 can move smoothly and the feeding amount of the wire 17 Since this change is gradually performed, it is possible to prevent the backlash of the window glass 2 from occurring.

  Furthermore, an extension mechanism 20 is provided at a portion where the wire 17 is fed out from the drum 14 so as to absorb a change in the amount of wire 17 fed out due to a difference in the diameter of the drum 14, so that a change in the tension of the wire 17 is reduced. Therefore, the window glass 2 can be raised and lowered smoothly.

  FIG. 5 shows a second embodiment of the present invention, in which the same components as in the first embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. 5 is an enlarged sectional view of the drum 14. is there.

  The drum structure of the wire-type window regulator of this embodiment is basically the same as that of the first embodiment, and this embodiment is particularly different from the first embodiment as shown in FIG. This is because the diameter D1 of the point corresponding portion 14a and the diameter D2 of the bottom dead center corresponding portion 14b are different from each other.

  That is, in this embodiment, the diameter D2 of the bottom dead center corresponding portion 14b is formed to be smaller than the diameter D1 of the top dead center corresponding portion 14a.

  Therefore, according to the present embodiment, the diameter D1 of the top dead center corresponding portion 14a of the drum 14 and the diameter D2 of the bottom dead center corresponding portion 14b are different from each other, so that the window glass 2 is fully closed and fully opened. The sound pressure level of the bottomed sound can be adjusted. Particularly in this embodiment, the bottomed sound when the window glass 2 is fully opened is larger than when the window glass 2 is fully closed, but corresponds to the fully opened side of the window glass 2. Since the diameter D2 of the bottom dead center corresponding part 14b to be reduced is reduced, the descending speed when the window glass 2 is fully opened is further reduced to reduce the bottom sound, and the sound pressure level at that time is substantially the same as when fully closed. Can be equivalent.

  By the way, the present invention has been described by taking the first and second embodiments as examples. However, the present invention is not limited to these embodiments, and various other embodiments can be adopted without departing from the gist of the present invention.

The whole block diagram which shows the state which attached the wire-type window regulator in 1st Embodiment of this invention to the door of a motor vehicle. The expanded sectional view of the drum in 1st Embodiment of this invention. The expanded side view of the state which wound the wire in the drum in 1st Embodiment of this invention. The expanded sectional view which shows the length absorption means of the wire in 1st Embodiment of this invention. The expanded sectional view of the drum in 2nd Embodiment of this invention.

Explanation of symbols

2 Window glass (window panel)
3 Window part 10 Wire type window regulator 11 Motor (drive means)
14 Drum 16 Spiral Groove 16a Top Dead Center Corresponding Part 16b Bottom Dead Center Corresponding Part 16c Intermediate Part 16d Curved Surface 17 Wire 20 Extending Mechanism (Length Absorbing Means)

Claims (5)

A drum that is formed on the outer periphery with a spiral groove and is rotated forward and backward by a driving means;
A wire wound around a part of the spiral groove and having one end connected to the rising side of the window panel and the other end connected to the lowering side of the window panel;
As the drum rotates, the winding portion of the wire has a bottom dead center corresponding portion arranged from the top dead center corresponding portion arranged on one end side in the axial direction of the drum to the spiral groove portion. In the wire type window regulator that moves up and down and raises and lowers the window panel to fully close and fully open,
The drum structure of the wire type window regulator, wherein the diameter of the top dead center corresponding part and the diameter of the bottom dead center corresponding part of the drum are smaller than the diameter of the intermediate part corresponding to the middle of the stroke when the window panel is raised and lowered .   The drum structure of the wire type window regulator according to claim 1, wherein the diameter of the portion corresponding to the top dead center is equal to the diameter of the portion corresponding to the bottom dead center.   The drum structure of the wire type window regulator according to claim 1, wherein the diameter of the portion corresponding to the top dead center and the diameter of the portion corresponding to the bottom dead center are made different from each other.   The wire type window regulator according to any one of claims 1 to 3, wherein the drum smoothly connects the top dead center corresponding part, the bottom dead center corresponding part, and the intermediate part by an inclined surface or a curved surface. Drum structure. A length absorbing means for absorbing a change in a wire feed amount due to a diameter difference between a top dead center corresponding portion and a bottom dead center corresponding portion and an intermediate portion is provided in a portion where the wire is fed from the drum. Item 5. The drum structure of the wire type window regulator according to any one of Items 1 to 4.

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