JPS6071320A - Window opening and closing device for vehicle - Google Patents

Abstract

PURPOSE:To detect approaching of a person without touching the person and to prevent closing of the window of a vehicle of means of such detecting signal, by installing an infrared detecting means which detects the presence of a heat source such as persons in a position in the vicinity of the window of the vehicle. CONSTITUTION:A detector 100, formed integrally with an amplifier 2 amplifying a fluctuation in a voltage of the intermediate point of a detecting element 1, is situated to the upper part of a vehicle window. The detector 100 provides a pulsating signal when a heat source, such as arms, enters a space in an opening. A safety circuit 30 including the detector 100 is connected to a control circuit 20, and the circuit 20, when a switch 5 closes contacts 5b and 5c, causes a window driving motor 12 to run forwardly and reversely to bring it into a stop at an arbitrary position. A circuit 30 includes comparators 3 and 4 which compare an amplified pulsating signal voltage from the detector 100 with two thresholds of the one being high and the other being low, and if the voltage exceeds the threshold, the input votages of comparators 18 and 19 are increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a window opening/closing device for a vehicle, which has a holding means that responds to the behavior of an occupant and opens a vehicle window based on a signal from the holding means. .

[Prior art]

JP-A-56-123783 discloses a vehicle window opening/closing device including a holding means. Also, in the same bulletin,
It is described that the holding of the holding means is released by detecting the motor load.

In devices that detect motor load in this manner, even when a human body or the like is caught in a window that is being closed, there is a problem in that the object presses against the obstacle until the motor load is detected.

[Purpose of the invention]

To promptly stop opening a window by detecting when a human body is caught without coming into contact with the human body.

[Structure of the invention]

In the present invention, an infrared detection means is provided to detect the presence or absence of a heat source such as a human body near a vehicle window, and this detects the proximity of a human body without touching the human body, and this detection signal prevents the vehicle window from opening. The structural feature is to prevent this.

〔Example〕

FIG. 1 represents one embodiment of the invention. In the figure, the infrared detection element 1 consists of two sensing elements connected in series, and a voltage corresponding to the intensity of the detected infrared rays appears at both ends, and a voltage corresponding to the intensity of the detected infrared rays appears at the midpoint. It is of the type where a voltage appears depending on the difference in infrared radiation. In this embodiment, a detector 100 that is integrated with an amplifier 2 that amplifies the variation in the midpoint voltage of the detection element (2) is installed at the top of the vehicle window as shown in FIG. The opening space formed is used as a detection area. 0; As described in 1, this detection element has two sensing elements, and when a heat source such as an arm enters the window opening space, the detector 100 detects a positive or negative signal at the midpoint of the detection element. A oscillating pulsating signal appears.

In the configuration shown in Figure 1, °Cl2O is
This is a control circuit for a vehicle window opening/closing device already known from Publication No. 83. In this embodiment, a safety circuit 30 including a detector 100 is connected to a control circuit 20.

When the manual switch 5 is turned on to the contact 5b (5c), the control circuit 20 can rotate the window drive motor 12 in the normal direction (reverse direction) and stop it at an arbitrary position. In this case, the relay 10 (11) is energized and the movable contact 10c (llc) leaves the normally open contact 10b (1l b) and moves from the normally open contact 10a (
By closing lla), the motor 12 is energized.

When the switch 5 is turned on to the contact 5a (5d), the motor 12 can continue to rotate until the window is fully opened even if the switch 5 is released. When the motor 12 starts rotating, the current detection resistor 17
The voltage across the voltage exceeds the threshold of the comparator 19, and the self-holding circuit consisting of transistors 6 and 7 (8 and 9) enters a holding state and continues to energize the relay 10 (11). When the window is fully opened, the load on the motor 12 increases and a lock current flows, and when the voltage drop across the resistor 17 exceeds the threshold of the comparator 18, self-holding is released and the relay 10 (11) is deenergized.

Now, the safety circuit 30 includes comparators 3 and 4 that compare the amplified pulsating signal voltage from the detector 100 with two thresholds, large and small.

Comparators 3 and 4 raise the input voltages of comparators 18 and 19 when the pulsating signal voltage exceeds a threshold. Therefore, if a heat source enters the detection area of the detector loo when self-holding is established by operating the switch 5 and the window is rising, a high level signal appears from the comparators 3 and 4, and the comparator In order to set the output of 18 to a low level and release the self-holding circuit (8, 9), the window stops closing and stops.

Note that the present invention is also applicable to an opening/closing device for a vehicle ceiling window. Further, the detector 100 may be arranged in a place where it cannot be seen on the side of the detection element l body, and the infrared rays detected by the optical fiber may be guided. Furthermore, since the release may be performed only when the vehicle window is closed, the output of the comparator 3.4 may act only on the I transistor 9 for holding when the vehicle window is closed.

Alternatively, the voltage across the detector 1 may be taken out and the hold may be released when the voltage exceeds a threshold.

〔Effect of the invention〕

Since the infrared detection means detects the human body without contact, safety can be ensured without putting pressure on the human body.

[Brief explanation of the drawing]

FIG. 1 is an electrical wiring diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the mounting position of the detector. 100...detector, 1...detection element, 3.4...
Comparator for release, 18... Comparator, 8.9
...Self-holding transistor. Representative Patent Attorney Takashi Okabe

Claims (1)

[Claims] In a vehicle window opening/closing device that has a holding means that responds to the behavior of an occupant and opens a vehicle window based on a signal from the holding means, there is provided an infrared detection means that detects the presence or absence of a heat source near the vehicle window, and a detection signal of the detection signal. A vehicle window opening/closing device comprising: means for releasing the fll mark holding in response to the above.