JP2004189111A - Electric sun shade device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive electric sun shade with a simple mechanism, having a small size and light weight. <P>SOLUTION: The electric sun shade device comprises a main shaft arranged near a lower end of a automotive rear window, and extending in a lateral direction; right and left bases attached to both ends of the main shaft, and fixed to a vehicular body; a hollow rotating shaft into which the main shaft is inserted and rotatably supported; a winding-up pipe into which the rotating shaft is inserted and rotatably supported; a sheet-shaped shade adhered to the winding-up pipe at a lower end and wound up, and upwardly unfolding along a surface generally parallel with the rear window; an upper end frame adhered with an upper end of the shade, and extending in the lateral direction in parallel with the winding-up pipe; a winding-up spring provided in one side end of the winding-up pipe, and energizing in a rotating direction for winding-up the shade; and a shade driving mechanism made by combining right and left link mechanisms coupled between the right and left bases and the upper end frame so as to vertically actuate the shade, and a screw-type driving mechanism composed of a male screw formed with inverse screws on both ends of the rotating shaft driven by a motor unit and a slide piece screwed with the male screw. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric sunshade device for a vehicle, and more particularly to an electric sunshade device that is reduced in size and weight.
[0002]
[Prior art]
2. Description of the Related Art In an electric sunshade device for shade of a rear seat passenger of an automobile, an arm drive system in which a rail is provided at an upper end of a shade that plays a role of a shade and an arm provided at the left and right ends of the rail moves the shade up and down. Is the mainstream.
FIG. 3 shows a conventional electric sunshade device. In this apparatus, the left and right arms 42 for vertically operating the shade 40 are often driven by a motor unit 44 provided substantially at the center of a main frame 43 of the electric sunshade apparatus. Two rods 46 are connected to the roots of the left and right arms 42 on a rotating plate 45 provided on the output shaft of the motor unit 44. When the rotating plate 45 performs a rotating motion by the motor unit 44, the two rods 46 are driven in the left-right direction. In conjunction with the movement of the rod 46, the left and right arms 42 rotate around the root as a fulcrum, and raise and lower the rail 41 provided at the upper end of the shade 40. At this time, the rail 41 is lowered by the action of a take-up spring (not shown) which is provided inside the shade take-up pipe 47 and constantly urges the shade in the rotation direction to take up the shade. It is wound by a shade winding pipe 47. On the other hand, when the shade 40 is pulled up, a biasing spring (not shown) that works in a direction opposite to the take-up spring is provided to reduce the load when the shade 40 is pulled up.
[0003]
As an improvement of the electric sunshade device, as shown in FIGS. 4A and 4B, when a sunshade is used, that is, when the sunshade is deployed and stored, respectively, a motor (not shown) is provided in a space in the main frame 51. And a power transmission shaft, and first and second gear means (not shown) are attached to bearing stays 52 and 53 at both left and right ends, respectively. The first gear unit transmits the rotational force of the motor to the vertical frame arm 54, and the second gear unit transmits the rotational force transmitted from the motor to the power transmission shaft to the vertical frame arm 55 (for example, Patent Document 1). With the symmetric rotation of the left and right vertical frame arms 54 and 55, the distal ends of the vertical frame arms 54 and 55 move up and down in the rails 56 provided at the upper end of the shade 50 while moving left and right. Thereby, the shade 50 is stored or unfolded through the function of a shade take-up spring (not shown) or the like.
[0004]
[Patent Document 1]
JP-A-11-62442 (page 4-10, FIG. 1-5).
[0005]
[Problems to be solved by the invention]
Such a conventional technique has the following problems.
In the electric sunshade device shown in FIG. 3, the motor unit 44 needs to be provided at the center of the main frame 43, and when the arm is driven, a force is also applied to the motor unit 44 side. Was. For this reason, the main frame 43 becomes large in size, causing an increase in the weight of the electric sunshade device and an accompanying increase in cost.
Further, since the installation space for the motor unit 44 and the main frame 43 is increased, the degree of freedom of the installation is limited, and it is difficult to install the motor unit 44 and a wagon with no sufficient installation space.
[0006]
On the other hand, the electric sunshade device of Patent Document 1 is improved so that the main frame 51 can be reduced in weight by providing a motor on one end side of the main frame 51. However, the driving mechanism including the first and second gear means and their power transmission shafts provided on the bearing stays 52 and 53 at both ends of the main frame 51 is complicated and heavy, and the weight, installation space and cost of the electric sunshade device are increased. Has not yet been improved.
[0007]
Furthermore, in any of the conventional structures, the one end of the take-up spring is always fixed to the main frame side, and the other end is fixed to the take-up pipe side. Since the relative position with respect to the winding pipe is large, the amount of change in the expansion and contraction of the winding spring depending on the position of the shade is large, and there is a problem that the weight and length of the winding spring are increased and the load is increased.
[0008]
The present invention has been made in order to solve these problems, and an object of the present invention is to provide an electric sunshade device that can realize a reduction in size, weight, and cost with a simple mechanism.
[0009]
[Means for Solving the Problems]
In order to solve the above problem, the present invention provides a main shaft extending left and right, which is arranged near a lower end of a rear window of an automobile, left and right bases attached to both ends of the main shaft and fixed to a vehicle body, respectively. A hollow rotary shaft that is inserted and rotatably supported, a winding pipe that is inserted and rotatably supported by the rotary shaft, and a lower end that is fixed to the winding pipe and wound, is substantially the same as a rear window. A sheet-shaped shade that can be unfolded upward along a parallel surface, an upper end frame that fixes the upper end of the shade and extends left and right in parallel with the winding pipe, and is provided inside one end of the winding pipe, A take-up spring that urges the shade in a rotating direction; a lower end that is pivotally attached to the left and right bases; an upper end that is pivotally attached to both ends of an upper end frame of the shade; Wear Left and right arms for driving the shade to expand and drive, male screws having left and right reverse screws formed at both ends of the rotary shaft, respectively, and screwed with the male screws of the left and right reverse screws, along the rotation axis direction. Left and right slide pieces that are guided by linear guides that extend on the left and right bases and that reciprocate relatively in opposite directions to the left and right as the rotary shaft rotates in both directions, and one end slides left and right respectively A left and right connecting link pivotally attached to the lower part of the left and right arms, and a transmission mechanism fixed to one of the bases and provided at one end of the rotating shaft. And a motor unit for driving the rotating shaft.
[0010]
Further, the winding spring is characterized in that one end is fixed to the rotating shaft and the other end is fixed to the winding pipe.
[0011]
Further, the transmission mechanism is characterized in that a reduction gear, a transmission belt or a timing belt is used.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a partial longitudinal sectional view showing a shade storage state of an electric sunshade device according to an embodiment of the present invention, and FIG. 2 is a partial longitudinal sectional view showing the shade unfolded state.
[0013]
The electric sunshade device of the present invention includes a main shaft 1 extending left and right, which is arranged near a lower end of a rear window of an automobile, and left and right bases 2 attached to both ends 1a, 1a of the main shaft 1 and fixed to a vehicle body 100, respectively. 2, a hollow rotary shaft 7 through which the main shaft 1 is inserted and rotatably supported, a winding pipe 11 through which the rotary shaft 7 is inserted and rotatably supported, and a lower end fixed to the winding pipe 11 It is roughly composed of a sheet-like shade 13 that is rolled up and rolled up along a plane substantially parallel to the rear window, and a shade driving mechanism that expands and stores the shade 13.
[0014]
Fixed portions 2a provided at the lower portions of the left and right bases 2, 2 are fixed to the left and right sides of the vehicle body 100 near the lower end of the rear window by bolts. The main shaft 1 has both ends 1a, 1a fitted and fixed in mounting holes 2a, 2a provided in the upper portions of the left and right bases 2, 2, respectively, and is supported by the left and right bases 2, 2.
[0015]
An upper end frame 14 is fixed to the upper end of the shade 13 and extends left and right in parallel with the winding pipe 11.
The shade driving mechanism has a lower end pivotally attached to the left and right bases 2 and 2 via fixing pins 5 and 5, and has upper ends fixed to both ends of the upper end frame 14 of the shade 13. Left and right arms 4 and 4 which are pivotally mounted via the shaft to unfold and drive the shade 13, male screws 8 and 8 having left and right reverse screws formed at both ends of the rotating shaft 7, and male screws 8 and 8 having left and right reverse screws respectively. And are guided by linear guides 3 extending on the left and right bases 2 along the direction of the rotation shaft 7 along the direction of the rotation shaft 7, and relative to each other in the right and left opposite directions as the rotation shaft 7 rotates in both directions. Left and right slide pieces 9 and 9 which reciprocate in a reciprocating manner, and one end is pivotally connected to the left and right slide pieces 9 and 9 via fixing pins 10 and 10 respectively, and the other ends are left and right arms 4 and 4 respectively. Are pivotally connected to the lower part through pins 10b and 10b. Left and right connecting links 10 and 10 and a motor unit 6 provided on one base 2 and rotationally driving the rotary shaft 7 via a transmission mechanism provided at one end of a male screw 8 on one side of the rotary shaft 7. It is configured.
[0016]
The left and right arms 4, 4 are composed of left and right upper arms 4a, 4a and lower arms 4b, 4b pivotally connected via pins 16, 16, respectively, and are freely bendable at the pins 16, 16 in the middle. Has become.
[0017]
As the transmission mechanism, various known mechanisms can be arbitrarily selected. For example, a reduction gear including large and small gears 8a and 6a provided at the male screw 8 end and the output shaft end of the motor unit 6, respectively, or Each of them is composed of a conduction belt and a pulley (not shown) or a combination of a timing belt and a timing gear.
[0018]
A take-up spring 12 is provided inside one end of the take-up pipe 11 so as to urge the shade 13 in a rotational direction for taking up the shade 13. The winding spring 12 has one end 12 a fixed to the rotating shaft 7 and the other end 12 b fixed to the winding pipe 11.
[0019]
As described above, the present invention can eliminate the main frame, which is the largest external component among the components of the conventional electric sunshade device, is heavy, and becomes a fixed component that hardly functions after being assembled to the vehicle. It has a characteristic configuration.
[0020]
Next, the operation of the electric sunshade device of the present invention configured as described above will be described.
[0021]
When the rotating shaft 7 is rotated in one direction by the motor unit 6, left and right sliding pieces 9 and 9 screwed to male screws 8 and 8 having left and right reverse screws formed at both ends of the rotating shaft 7, as shown in FIG. Along the linear guide 3 in the directions of the arrows, that is, rightward and leftward, respectively. With the movement of the left and right slide pieces 9, 9, the left and right lower arms 4 a, 4 a of the left and right arms 4, 4 are pushed by the left and right connecting links 10, 10 in the counterclockwise direction of the arrow. It rotates and contracts in a bent state with the left and right upper arms 4b, 4b at the pins 16, 16. Due to the contraction of the arms 4, 4, the upper end frame 14 of the sunshade 13 connected to the upper ends of the left and right upper arms 4b, 4b by the fixing pins 15, 15 is pulled down.
[0022]
At this time, since the shade 13 is constantly urged in the winding direction by the winding spring 12, the shade 13 is wound around the winding pipe 11 without slack as the upper end frame 14 is pulled down. , The shade storage state as shown in FIG.
[0023]
On the other hand, when the rotating shaft 7 is reversely rotated in the other direction by the motor unit 6, the left and right sliding pieces 9, 9 screwed into the male screws 8, 8 at both ends of the rotating shaft 7 are linear guides as shown in FIG. 3 along the direction of the arrow, ie, left and right, respectively. Along with the movement of the left and right slide pieces 9, 9, the left and right lower arms 4a, 4a of the left and right arms 4, 4 are drawn into the left and right connecting links 10, 10 and rotated in the clockwise direction indicated by arrows. Then, the left and right upper arms 4b, 4b bent at the pins 16, 16 are extended in a substantially linear state. As the arms 4 advance, the upper end frame 14 of the sunshade 13 connected to the upper ends of the left and right upper arms 4b, 4b by the fixing pins 15, 15 is pulled upward.
[0024]
At this time, the shade 13 is pulled upward from the winding pipe 11 by the upper end frame 14 against the biasing force of the winding spring 12 constantly biased in the winding direction, and the shade is unfolded as shown in FIG. State.
[0025]
In the above-mentioned shade storing and unfolding operation, when the rotating shaft 7 rotates in both directions, the winding pipe 11 rotates together with the rotating shaft 7 in the same direction, and the relative positions of the winding pipes 11 hardly change. The take-up spring 12 fixed to the take-up pipe 11 can minimize the amount of change in expansion and contraction depending on the position of the shade 13. In this regard, as described above, the one end of the take-up spring is always fixed to the main frame side, and the other end is fixed to the take-up pipe. This is basically different from the conventional method in which the amount of change in the expansion and contraction of the take-up spring due to the position of the shade is large because the relative position with respect to the position is large.
[0026]
【The invention's effect】
According to the present invention described in detail above, the following excellent effects can be obtained.
(1) By disposing and supporting a shade drive mechanism and a shade take-up mechanism such as left and right slide pieces for expanding and retracting the shade on the main shaft, a heavy and long main frame as in the related art is not required, and the electric motor is electrically driven. The size and weight of the sunshade device and the cost can be reduced.
(2) Since the shade drive mechanism has a simple and compact configuration including a combination of a link mechanism of an arm and a connecting link and a screw drive mechanism of a rotary shaft and a slide piece, the electric sunshade device can be reduced in size and weight. This can contribute to cost reduction.
(3) Further, the winding pipe rotates in the same direction together with the rotating shaft when the rotating shaft rotates in both directions, and the relative position of the two hardly changes. Therefore, both ends are fixed to the rotating shaft and the winding pipe, respectively. The amount of change in the progress and contraction of the take-up spring due to the position of the shade can be minimized, and the size and weight of the take-up spring and the load can be reduced. This can further contribute to reducing the size and weight of the electric sunshade device and reducing costs.
[Brief description of the drawings]
FIG. 1 is a partial longitudinal sectional view showing a shade storage state of an electric sunshade device according to an embodiment of the present invention.
FIG. 2 is a partial longitudinal sectional view showing a shade deployment state of the electric sunshade device according to one embodiment of the present invention.
FIG. 3 is a perspective view showing an example of a conventional electric sunshade device.
FIG. 4 (a) is a perspective view showing a shade deployment state of another example of the conventional electric sunshade apparatus, and FIG. 4 (b) is a perspective view showing a shade storage state of another example of the conventional electric sunshade apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main shaft 2 Base 2a Fixed part 3 Linear guide 4 Arm 4a Lower arm 4b Upper arm 5, 10b, 15 Fixed pin 6 Motor unit 6a, 8a Transmission mechanism (reduction gear)
7 rotating shaft 7a, 11a take-up spring fixing part 8 male screw 9 slide piece 10 connecting link 10a, 10b, 16 pin 11 take-up pipe 12 take-up spring 100

Claims (4)

A left and right main shaft arranged near the lower end of the rear window of the vehicle;
Left and right bases attached to both ends of the main shaft and fixed to the vehicle body respectively,
A hollow rotary shaft through which the main shaft is inserted and rotatably supported,
A winding pipe through which a rotating shaft is inserted and rotatably supported,
A sheet-like shade whose lower end is fixed to the winding pipe and is wound up, and which can be unfolded upward along a surface substantially parallel to the rear window,
An upper end frame that fixes the upper end of the shade and extends left and right in parallel with the winding pipe,
A take-up spring provided inside one end of the take-up pipe and biasing in a rotational direction to take up the shade;
The lower end is respectively attached to the left and right bases, and the upper end is pivotally attached to both ends of the upper end frame of the shade, and the middle portion is pivotally attached to the left and right arms to expand and drive the shade.
A male screw formed with left and right reverse screws at both ends of the rotation shaft,
Each is screwed with the male screw of the left and right reverse screw, and guided by a linear guide extending on the left and right bases along the rotation axis direction, and in the opposite directions to the left and right with the rotation of the rotation axis in both directions. Left and right slide pieces that reciprocate relatively,
One end is left and right slide pieces, and the other end is a left and right connection link pivotally attached to the lower part of the left and right arms,
An electric sunshade device, comprising: a motor unit fixed to the one base and driving the rotation shaft via a transmission mechanism provided at one end of the rotation shaft. The electric sunshade device according to claim 1, wherein one end of the winding spring is fixed to the rotating shaft, and the other end is fixed to a winding pipe. The electric sunshade device according to claim 1, wherein the transmission mechanism includes a reduction gear. The electric sunshade device according to claim 1, wherein the transmission mechanism uses a conduction belt or a timing belt.

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