JPH0584773U - Power window drive - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the number of components and the number of assembly steps by integrating the components in the drive unit for opening and closing the windshield of the power window. [Structure] Housing 11, motor 14 as a drive source attached to housing 11, and motor 14
The transmission mechanism 24, 2 for decelerating and rotating the pulley 26 by the
5 and sensor means 33, 3 for detecting the rotation state of the motor
4 and the motor 14 based on the detection signal of this sensor means.
And a control circuit structure 29 for controlling the rotation of the control circuit structure 29, and the transmission mechanisms 24, 25, the sensor means 33, 34, and the control circuit structure 29 are integrally incorporated in the housing 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

The present invention relates to a power window applied to a vehicle such as an automobile to open and close a window glass by a motor or the like, and more particularly to a structure of a drive unit including the motor.

[0002]

[Prior Art]

 The power window has a structure in which a window glass (window glass) is opened / closed by a motor or the like, and has a structure shown in FIG. 3, for example. This figure is a schematic configuration diagram, in which a rail 2 is vertically extended in a lower vehicle body of an automobile to hold a slider 3 slidably in the vertical direction. A wire 4 is connected to the slider 3, and the wire 4 is wound around pulleys 5 arranged at the upper and lower ends of the rail 2 and connected to a power window drive unit 1. When driven, the slider 3 is moved up and down via the wire 4. A window glass 6 is attached to the slider 3, and when the window glass 6 is moved up and down together with the slider 3, the window space defined by the sash 7 is opened and closed.

[0003]

[Problems to be solved by the device]

 By the way, in this type of power window, as a measure to prevent the hands or neck from being caught between the window glass 6 and the sash 7, while detecting the opening / closing operation of the window glass 6, that is, the rotation of the motor. A configuration that controls the rotation direction and rotation speed of the motor may be adopted. Therefore, conventionally, a sensor means for detecting the motor rotation and a control circuit for controlling the motor rotation are provided in a part of the power window. Conventionally, such a sensor means and a control circuit are prepared separately from the drive unit, and they are attached to the drive unit or are attached to the vehicle body separately from the drive unit. ing. As a result, the number of parts that make up the power window increases, and the number of man-hours required to assemble the power window to the vehicle becomes complicated. An object of the present invention is to provide a power window drive unit in which parts are integrated to reduce the number of constituent parts and the number of assembling steps.

[0004]

[Means for Solving the Problems]

 The present invention is directed to a housing, a motor attached to the housing as a drive source, a transmission mechanism for decelerating and rotating a pulley by the motor, a sensor means for detecting a rotation state of the motor, and a detection means of the sensor means. A drive unit for a power window including a control circuit structure for controlling the rotation of a motor based on a signal, wherein a transmission mechanism, a sensor means, and a control circuit structure are integrally incorporated in a housing. Here, the magnet part of the motor and the control circuit structure are arranged separately from each other in the axial direction of the motor. The sensor means is composed of a magnet fixed to the rotating shaft of the motor and one or more Hall elements arranged around this magnet, and the magnet is attached to the rotating shaft to prevent the sliding contact piece of the motor. The Hall element is supported by a supporting cylindrical substrate, and is attached to the housing to support the motor brush on the supporting substrate.

[0005]

【Example】

 Next, the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of an embodiment of the drive unit of the present invention. The housing 11 is formed of a metal material or the like, and screw insertion holes 12 for fixing to a vehicle body of a vehicle are provided at a plurality of places, and a motor 14 is provided at an opening 13 provided at one side surface thereof. Be worn. The motor 14 has a rotary shaft 17 at the center of a cylindrical motor case 15, which has one end supported by the motor case 15 and the other end supported by the housing 11 by thrust bearings 16, respectively. A rotor 18 composed of an iron core and a coil is attached to this. A stator 19 composed of a magnet is attached to the inner peripheral surface of the motor case 15. Further, a cylindrical substrate 21 provided with a sliding contact piece 20 is fixed to the rotary shaft 17, and is supported by a disc-shaped substrate 22 attached to the opening 13 of the housing 11 by screwing or the like. The conductive brush 23 thus made is brought into sliding contact to form a brush portion. A worm 24 is integrally formed on the other end of the rotating shaft 17.

A large-diameter worm gear 25 that meshes with the worm 24 and constitutes a transmission mechanism is axially supported in the housing 11, and a large-diameter pulley 26 is integrally provided in the worm gear 25. There is. The wire 4 of the power window shown in FIG. 3 is wound around the pulley 26. A circuit board 27 is internally supported by screws 28 at other portions of the housing 11, and a control circuit for controlling the rotation of the motor 14 is constructed on the circuit board 27 to form a control circuit structure 29. I am configuring. The components constituting the control circuit structure 29 include a one-chip microcomputer 30 and a relay switch 31 for switching the current path of the motor 14, which are integrally mounted on the circuit board 27. Here, it is preferable that the control circuit structure 29 is arranged so as to be separated from the magnet forming the stator 19 of the motor 14 in the axial direction of the rotary shaft 17. Further, a connector 32 is formed in a part of the housing 11, and by fitting with an external connector (not shown), various external switches, power supplies and the like are electrically connected to the control circuit structure 29.

Further, a ring-shaped magnet sensor 33 is fixed to the rotary shaft 17 at the opening position of the housing 11, as shown in the sectional view taken along the line AA of FIG. 1 in FIG. Here, the magnet sensor 33 is integrally supported on the rotary shaft 17 by using a cylindrical substrate 21 that supports the sliding contact piece 20 that constitutes the brush portion of the motor 14. Further, on the disk-shaped substrate 22 attached to the opening 13 of the housing 11, two Hall elements 34 are mounted on the surface opposite to the conductive brush 23. These Hall elements 34 are arranged at two locations on the circumference of the magnet sensor 33 so as to define a circumferential angle of 90 degrees between them, and sense the magnetic pole of the magnet sensor 33 which is rotated together with the rotary shaft 17. Then, a pulse signal can be generated, and by utilizing this pulse signal, it is configured as a sensor means for detecting the rotation speed of the rotating shaft 17 and the like. The disc-shaped substrate 22 and the circuit substrate 27 of the control circuit structure 29 are electrically connected to each other by a jumper wire 35 or the like.

According to the drive unit 1 having this configuration, when the external power is supplied through the connector 32, the motor 14 is driven. The rotation shaft 17 is rotated by the drive of the motor 14, the pulley 26 is rotated by the engagement of the worm 24 and the worm gear 25, and the wire 4 is rotated to open / close the window glass 6. When the rotary shaft 17 is rotated, the magnet sensor 33 fixed to the rotary shaft 17 is also integrally rotated, and the pulse signals are respectively generated from the Hall elements 34 accordingly. Then, the microcomputer 30 of the control circuit structure 29 detects the rotating direction and the rotating speed of the motor 14 based on the pulse signal, and further detects the open / close state of the window glass 6 and then controls the relay switch 31. Then, the rotation of the motor 14 is controlled, and as a result, the window glass is opened and closed as required.

Therefore, the sensor means for detecting the rotation of the motor and the control circuit structure for controlling the rotation of the motor can be incorporated into one housing together with the motor and the gear mechanism thereof, and only this drive section is provided. It becomes possible to configure most of the electric system of the power window. Therefore, if the drive unit 1 is integrally assembled together with the rail 2, the slider 3, the wire 4 and the like shown in FIG. 3 to form one unit, the assembly of the power window to the automobile or the like is performed by this one unit. It is possible to make the work extremely easy by simply incorporating the.

Further, here, since the housing is configured so that the control circuit structure 29 is separated from the magnet forming the stator 19 of the motor 14 in the axial direction of the rotating shaft 17, the magnetic field of this magnet is The influence on the control circuit structure 29 is reduced, and the EMI failure to the control circuit structure can be prevented by the magnet. Further, here, since the magnet sensor 33 constituting the sensor means is supported on the rotary shaft 17 by the cylindrical substrate 21 supporting the sliding contact piece 20 constituting the brush portion of the motor, the brush portion is assembled. At the same time, the assembling of the magnet sensor 33 is completed. On the other hand, since the Hall element 34 is also mounted on the disc-shaped substrate 22 attached to the opening of the housing 11 together with the conductive brush 23, if the disc-shaped substrate 22 is attached to the housing 11, Since the Hall element 34 is assembled at the same time, this work can be simplified.

[0011]

[Effect of the device]

 As described above, according to the present invention, the motor constituting the power window is attached to the housing, and the transmission mechanism of the motor, the sensor means, and the control circuit structure are integrally incorporated in the housing. Since the parts can be configured as one unit, the number of parts constituting the power window can be reduced, and the work of assembling the power window to the vehicle can be simplified. Further, by disposing the magnet portion of the motor and the control circuit structure in the axial direction of the motor, the control circuit structure can be prevented from the EMI failure caused by the motor. Further, the sensor means is composed of a magnet fixed to the rotation shaft of the motor and one or more Hall elements arranged around the magnet, and the magnet is supported on a cylindrical substrate which supports the sliding contact piece of the motor. Since the Hall element is supported by the substrate that supports the brush of the motor, the number of parts of the driving unit itself can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a drive unit for a power window according to the present invention.

FIG. 2 is a cross-sectional view corresponding to the line AA in FIG.

FIG. 3 is a schematic configuration diagram showing an example of a power window to which the present invention is applied.

[Explanation of symbols]

 1 Power Window Driving Section 6 Wind Glass 11 Housing 14 Motor 17 Rotating Shaft 21 Cylindrical Substrate 22 Discoidal Substrate 24 Worm 26 Pulley 27 Circuit Board 29 Control Circuit Structure 33 Magnet Sensor 34 Hall Element

Claims (3)

[Scope of utility model registration request] 1. A housing, a motor as a drive source attached to the housing, a transmission mechanism for decelerating and rotating a pulley by the motor, a sensor means for detecting a rotational state of the motor, and a sensor means. In a power window drive unit including a control circuit structure for controlling the rotation of the motor based on the detection signal of 1., the transmission mechanism, the sensor means, and the control circuit structure are integrally incorporated in the housing. Drive unit for power windows. 2. The drive unit for a power window according to claim 1, wherein the magnet portion of the motor and the control circuit structure are spaced apart from each other in the axial direction of the motor. 3. The sensor means comprises a magnet fixed to a rotating shaft of the motor and one or more Hall elements arranged around the magnet, the magnet being attached to the rotating shaft to slide the motor. 3. The power window drive unit according to claim 1, wherein the contact element is supported by a cylindrical substrate, and the Hall element is supported by a substrate which is attached to the housing and supports the brush of the motor.