JPH0350025A - Position detector for motor-operated sun roof of automobile - Google Patents

Abstract

PURPOSE:To reduce the number of parts, promote miniaturization and reduce the cost and improve the detecting accuracy, by providing a forward/backward movable level part, a working part displacing in one body with the former and directly operating a limit switch, and a transmission member energizated to forward direction with a spring in a geared wire passage. CONSTITUTION:When a close button 51 is made ON at the full opening position of a lid 3, a drive motor 23 is normally rotated, a drive pinion 24 is rotated to advance geared wires 4,22, and the the lid 3 is moved to the closing direction. When the lid 3 is moved by a distance L1, the end part 4s of the wire 4 reaches a third limit switch 27, and a motor 23 stops based on the position detection with the switch 27. The position is 10 and a few cm this side of the full closing position, and this temporary stop is for safety. When the button 51 is further made ON in this condition, the motor 23 is operated again, and the full closing position is reached due to advance by the distance L2. Hereat, the motor 23 is stopped, based on the position detection with a first limit switch 5 in a posi tion detector 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a position detection device for an electric sunroof of an automobile for controlling the position of a lid.

[Conventional technology]

Generally, an electric sunroof for an automobile has a lid disposed in an opening provided in the roof, and the lid is moved by a drive unit to open and close the opening.

By the way, how do you detect the stop position of the lid? In this case, conventionally disclosed in Japanese Patent Publication No. 60-12253,
A "switch mechanism for controlling the operation of a movable roof of an automobile with a retractable roof" is known. The switch mechanism disclosed in the same publication is such that when the movable roof (lid) slides in the closing direction, near the fully closed position, the tip of the movable roof drive wire is inserted and guided into the guide part of the frame, and the wire pushes the shaft. A rack-like member that slides in the direction is fitted, a gear that engages with this rack-like member is rotatably mounted on the frame, a spiral groove is formed in this gear, and the proximal end engages with this spiral groove. A limit switch for stopping the movable roof when it slides forward, which has a switch operating piece having two switch operating parts at its tip supported by the frame so as to be slidable, and is actuated by each of the two switch operating parts. And the limit switch for stopping when the movable roof tilts down is set so that when the limit switch for stopping when the movable roof slides forward is activated, the limit switch for stopping when the other tilting down is activated. When the movable roof slides forward or tilts down, the drive source such as the electric motor that drives the movable roof drive wire is stopped and the movable roof is fully closed when the movable roof is slid forward or tilted down. As a result, the fully closed state of the movable roof can be automatically maintained accurately, and the movable roof can be made smaller and more compact.

[Problem to be solved by the invention]

However, the above-mentioned conventional technology requires various parts such as a rack-shaped member that moves by being pushed by a drive wire, a gear with a spiral groove, and a switch operation piece that is attached to the gear, resulting in an increase in the size and cost of the mechanism. In addition, due to the presence of a complicated transmission mechanism, the responsiveness is poor, and the detection accuracy is lowered, making it impossible to accurately detect the position.

It is an object of the present invention to provide a position detection device for an electric sunroof of an automobile, which eliminates the problems existing in the conventional technology.

[Means to solve the problem]

Position detection device for an electric sunroof of an automobile according to the present invention l
is moved forward and backward by the drive unit 2, and one end is connected to the lid 3.
When configuring a position detection device that detects the position of the geared wire 4 that opens and closes the lid 3 by using a limit switch 5.6, a lever that can freely enter and exit the passage 7 of the geared wire 4 is provided. The parts 8a, 9a are displaced together with the lever parts 8a, 9a, and the displacement position -
By limit switch 5.6 switch knob 5p,
It is characterized in that it has operating parts 8b and 9b that can directly operate 6p, and is provided with a pair of transmission members 8.9 that are biased in the advancing direction by a spring member 10. In addition, in an optimal form, the transmission member 8.9 is rotatably supported by a support shaft 11.12, and has cam parts 8s and 9s on the operating parts 8b and 9b that can operate the switch knobs 5p and 6p, A pair of coil springs 10λ on both sides
, lOb.

[For production]

According to the electric sunroof position detection device 1 according to the present invention, the transmission member, especially the support shaft! ! , 12, the transmission member 8.9 is rotatably supported by the geared wire 4 in the passage 7.
If there is no spring member! 0, the lever parts 8a, 9a enter into the passage 7. As a result, the cam parts 8s and 9s are connected to the switch knob 5p16.
p, the switch knobs 5p, 6p protrude from the limit switch 5.6.

On the other hand, if the gear wheel 4 is present in the passage 7, the lever portions 8a, 9a of the transmission member 8.9 exit from the passage 7. As a result, the integrated cam portions 8s and 9s are rotationally displaced and push the switch knobs 5p and 6p into the limit switch 5.6.

Therefore, the position of the end 4s of the geared wire 4, that is, the position of the lid 3 can be detected by each limit switch 5 or 6.

〔Example〕

Below, preferred embodiments of the present invention will be described in detail based on the drawings.

First, the schematic structure of the electric sunroof will be explained with reference to FIG. 4.

The electric sunroof indicated by the symbol R in the figure includes a movable lid 3 that opens and closes an opening 21 formed in the automobile roof. One end of a pair of gear wheels 4.22 for moving the lid 3 is connected to the left and right sides of the lid 3, respectively. Further, a drive unit 2 is disposed near the opening 21 to move each geared wire 4.22 forward and backward. As shown in FIG. 5, the drive unit 2 includes a drive motor 23 and a drive pinion 24 rotated by the drive motor 23.
, and each geared wire 4.22 is engaged with the drive pinion 24 at a position 180° opposite to the drive pinion 24. A position detection unit 26 for detecting the position of the end portion 4s of the geared wire 4 is disposed at a midway position of the wire tube 25 through which one of the geared wires 4 is inserted. Position detection section 26
The lid 3 is provided with a third limit switch 27 for position detection to temporarily stop the lid 3 at a predetermined position before the fully closed position, and a position detection device l for detecting the fully closed position and stopping the lid 3.

Next, the position detection device 1, which constitutes the main part of the present invention, will be specifically explained with reference to FIGS. 1 to 3.

First, a switch case 31 is attached to a midway position of the wire tube 25, and the geared wire 4 is configured to be exposed inside the switch case 31.

Further, inside the switch case 3/1, a pair of transmission members 8.9 are disposed in the vicinity of the geared wire 4, so as to be rotatable by support shafts 11, 12 one behind the other in the forward and backward directions thereof. Note that one of the transmission members 8 and 9 detects that the lid 3 has slid from the open state to the fully closed state, and the other transmission member 9 detects that the lid 3 has slid down from the tilted state. to detect that the fully closed state has been reached. Further, the transmission member 8.9 includes lever portions 8a and 9a formed in a protrusion shape, an action portion 8b having cam portions 8s and 9s,
9b is integrally provided. Further, a first limit switch 5 and a second limit switch 6 are arranged in the switch case 31 facing the cam parts 8s and 9s. In addition, each transmission member 8.9 is equipped with a spring member IO, and the lever portion 8.
a, 9a are biased in the direction of entering the passage 7. The spring member IO has coil springs 10a and ta on both sides.
b, and each coil spring 10a, 1
0b is attached to the transmission member 8.9, and its end is bent and locked to the transmission member 8.9.

Therefore, if the geared wire 4 does not exist in the passage 7,
The lever parts 8a, 9a enter the passage 7 as shown by the imaginary lines in FIG. 3, and if the geared wire 4 is present in the passage 7, the transmission member 8.9 rotates, exits from the passage 7 as shown by the solid line in the figure. On this occasion,
The cam parts 8s and 9s integral with the transmission member 8.9 are the lever part 8a.

When 9a enters passage 7, switch knob 5 ps
6p, the switch knobs 5p and 6p protrude from the limit switch 5.6, and the lever parts 8a and 9
When a leaves the passage 7, the switch knobs 5p and 6
p and push into limit switch 5.6. Thereby, the position of the end portion 4s of the geared wire 4, that is, the position of the lid 3 can be detected.

Next, the overall operation of the electric sunroof R will be explained with reference to FIGS. 5 and 6.

In addition, FIG. 6 is a circuit diagram of the control system, and 51 is a close button, 52 is an open button, 53 is a tilt button,
54 is a logic circuit, 55 is a one-shot circuit, 56 is a hold circuit, 57 is a drive circuit, 58 is a display circuit including a pilot lamp, etc., and 59 is a bulb. In addition,
Components that are the same as those shown in FIGS. 1 to 5 are given the same reference numerals to clarify their configurations.

In FIG. 5, the lid 3 indicated by a solid line is in a fully open position.

If the close button 51 is now turned on in this position, the drive motor 23 rotates in the normal direction, and the drive pinion 24 rotates. As a result, the geared wire 4.22 moves forward and the lid 3 is moved in the closing direction. And lid 3
When the geared wire 4 moves by a distance t,1, the end 4s of the geared wire 4 reaches the third limit switch 27, and the drive motor 23 stops based on the position detection by the third limit switch 27.

This position is about ten centimeters before the fully closed position.
Stop temporarily to be safe. If the close button 51 is further turned on from this state, the drive motor 23 will be reactivated and the distance A! It moves forward by flL2 and reaches the fully closed position.

At this time, the drive motor 23 is stopped based on the position detection of the first limit switch 5 in the position detection device 1.

Next, when the tilt button 53 is turned on from the fully closed position, the drive motor 23 further rotates in the normal direction, and the geared wire 4 moves forward. As a result, the rear end of the lid 3 rises, and the distance L3 (
The vehicle will stop at a position (tilted) that has been raised by a distance (including the free running distance). Stopping in this case can be controlled by detecting an overcurrent in the drive motor 23. On the other hand, when closing from the tilted state, the close button 51 is turned on, so that the drive motor 23 rotates in the reverse direction, causing the geared wire 4 to move backward.

Then, the second limit switch 6 detects the position at which the drive motor 23 has retreated by the distance L3, and stops the drive motor 23. Further, when opening the lid 3 from the fully closed position, the open button 52 may be turned on.

Note that the detection position of the stop position is different when the lid 3 is slid from the open state to the fully closed position and when it is lowered from the tilted state and moved to the fully open position. This is to maintain a completely closed state on both sides even if the drive section moves a little.

Although the embodiments have been described in detail above, the present invention is not limited to these embodiments.

For example, although the case where the transmission member is of a rotating type is shown, it may be of a sliding type, or a link or the like may be used if necessary. Further, the spring members may be provided individually depending on each transmission member. In addition, the detailed structure, shape, etc. may be arbitrarily changed without departing from the gist of the present invention.

〔Effect of the invention〕

As described above, the position detection device for an electric sunroof of an automobile according to the present invention includes a lever portion that can freely enter and leave the path of the geared wire, and a lever portion that is displaced integrally with the lever portion,
It has an operating part that can directly operate the switch knob of the limit switch depending on the displacement position, and is provided with a transmission member that is biased in the entry direction by a spring member.
It has the following effects.

■ The number of parts used in the switch mechanism can be significantly reduced, making the mechanism smaller and lower in cost.

■ The simplification of the transmission mechanism improves responsiveness, improving detection accuracy and enabling accurate position detection.

[Brief explanation of drawings]

Fig. 1.2 A partially cutaway configuration diagram of a position detection device according to the present invention. Fig. 2.2 A configuration diagram of a position detection unit equipped with the same position detection device. Fig. 2 - A partially cutaway configuration diagram of the same position detection device. , Fig. 3: An enlarged configuration diagram of the vicinity of the transmission member in the same position detection device, Fig. 4: An overall perspective view of the electric sunroof equipped with the same position detection device, Fig. 5: An explanatory diagram of the operation of the electric sunroof, Fig. 6 Figure 2: Circuit diagram of the control system of the electric sunroof. In the drawings, l: position detection device 2: drive unit 3: lid 4: geared wire 5.6: limit switch 5p, 6p: switch knob 7: passage 8.9 = transmission member 8a, 9a lever part 8b, 9b: Action parts 8s, 9s: cam part
IO = Spring members 10a, 10b: Coil spring 11.12: Support shaft

Claims (1)

[Scope of Claims] [1] For an electric sunroof of an automobile, which moves forward and backward by a drive unit, has one end connected to a lid, and uses a limit switch to detect the position of a geared wire that opens and closes the lid. The position detection device has a lever part that can freely enter and leave a passage of a geared wire, and an operating part that is displaced integrally with the lever part and can directly operate a switch knob of a limit switch depending on the displaced position, and 1. A position detection device for an electric sunroof of an automobile, comprising a transmission member biased in the entry direction by a spring member. [2] The position detection device for an electric vehicle sunroof according to claim 1, wherein the transmission member is rotatably supported by a support shaft, and has a cam portion in the operating portion that can operate a switch knob. [3] The electric sunroof position for an automobile according to claim 1 or 2, wherein the transmission member is biased by a pair of spring members disposed in the moving direction of the geared wire and having a pair of coil springs on both sides. Detection device.