JP4755446B2 - Opening and closing device for vehicle - Google Patents

Description

  The present invention relates to a vehicle opening / closing device in which an opening / closing body supported by a vehicle body so as to be opened / closed is opened / closed by a drive unit.

2. Description of the Related Art Conventionally, a drive unit in a vehicle opening / closing device has a motor that can rotate forward and reverse, a speed reduction mechanism that decelerates the rotational force of the motor, and the rotational force of the motor via the speed reduction mechanism. Rotating means (rotating drum) capable of being transmitted to an opening / closing body (for example, a sliding door supported to be opened / closed by the vehicle body) via a coupling means, and detection means configured by a rotary encoder or the like for detecting movement of the opening / closing body The opening / closing body is moved in the opening / closing direction via the cable by winding the cable by rotation of the rotating means (see, for example, Patent Document 1).
JP 2004-346624 A

  However, in the conventional vehicular opening / closing device as described above, the detection means detects the movement of the opening / closing body by detecting the rotation of the detection gear that rotates at high speed in synchronization with the rotation of the rotation means. Therefore, a separate detection gear is required, which causes problems such as an increase in the number of parts and an increase in size.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art, and it is an object of the present invention to provide a vehicle opening / closing device in which the number of parts can be reduced by detecting the rotation of a rotating drum by a magnetic sensor. It is said.

According to the present invention, the above problem is solved as follows.
(1) In a vehicle opening / closing device in which an opening / closing body supported to be openable / closable by a vehicle body is opened / closed by a drive unit, the drive unit is rotated by a motor and a rotational force of the motor. a rotary drum made of transmissible synthetic resin to said opening and closing member via the cable, and provided on the rotary drum the rotary drum and integrally rotatable magnetic force portion, provided so as to face the magnetic force portion And a magnetic sensor capable of detecting the movement of the opening / closing body by detecting a change in the magnetic field of the magnetic force portion accompanying the rotation of the rotating drum , and the rotating drum has the cable wound around an outer peripheral surface thereof. The first resin part forming the drum part provided with the spiral groove and the raw material mixed with the synthetic resin with magnetic powder are integrally formed by two-color molding on the rotating part of the first resin part other than the spiral groove. Is And a second resin portion, the magnetic force part is formed by magnetizing a portion opposed to the magnetic sensor in the second resin portion.

(2) In a vehicle opening / closing device in which an opening / closing body supported to be opened / closed by a vehicle body is opened / closed by a drive unit, the drive unit is rotated by a motor and a rotational force of the motor. A synthetic resin rotating drum that can be transmitted to the opening / closing body via a cable, a magnetic part that is provided on the rotating drum and that can rotate integrally with the rotating drum, and is provided to face the magnetic part. And a magnetic sensor capable of detecting the movement of the opening / closing body by detecting a change in the magnetic field of the magnetic force portion accompanying the rotation of the rotating drum, and the rotating drum has the cable wound around an outer peripheral surface thereof. A portion of the first resin portion other than the spiral groove, which is formed of a first resin portion forming a drum portion provided with a spiral groove and a conductive material obtained by kneading a conductive fine powder in a synthetic resin. Times And a second resin part to be bonded to a portion, the magnetic portion is formed by a magnet that is insert molded into the second resin portion.

In (3) above (1) term, the magnetic portion is provided in a recess provided on the rotating surface of the rotating drum, placing the magnetic sensor, so as to enter into the recess.

According to the present invention, the following effects can be obtained.
(A) By providing a magnetic part on the rotating drum and the magnetic sensor detects a change in the magnetic field of the magnetic part as the rotating drum rotates, the conventional detection gear can be eliminated and the number of parts can be reduced. In addition, the drive unit can be reduced in size.
(B) The first resin portion forming the drum portion requiring high strength and the second resin portion provided with the magnetic force portion can be respectively molded from an appropriate synthetic resin material, thereby improving quality. it can.

A first embodiment according to the present invention will be described below with reference to FIGS. 1 is a perspective view of a vehicle to which the first embodiment of the present invention is applied, FIG. 2 is a side view of a drive unit, FIG. 3 is an enlarged longitudinal sectional view taken along line III-III in FIG. 2, and FIG. FIG. 4 is an enlarged longitudinal sectional view taken along line IV-IV in FIG. 2. In the following description, the left side in FIG . 1 and the lower side in FIG. 2 are referred to as “front”, the right side in FIG . 1 and the upper side in FIG .

  As shown in FIG. 1, the sliding door (1) that forms the opening and closing body of a minivan or wagon type vehicle is moved forward and backward by guide rails (3), (4), and (5) provided on the side surface of the vehicle body (2). The vehicle body (2) can be opened from a fully closed position in which the doorway (7) provided on the side surface of the vehicle body (2) is closed by manual operation and electric operation by the driving force of the drive unit (6). While moving slightly outward from the outer side, it is possible to move to the fully open position moved rearward along the side of the vehicle body (2) and vice versa.

  As shown in FIGS. 2 and 3, the drive unit (6) includes a metal base bracket (8) fixed to the vehicle body (2), a motor (9) capable of forward and reverse rotation as main components, and The first cable (10) which is pivotally supported by the pivot (18) and is connected in the closing direction of the sliding door (1) and the second cable (11) which is connected in the opening direction are wound and sent out. A rotating drum (12) constituting a rotating means made of synthetic resin that can be wound, and an electromagnetic clutch (13) capable of interrupting a power transmission path between the motor (9) and the rotating drum (12) (FIG. 3) And detection means (20) capable of detecting the movement of the slide door (1) by detecting the rotation of the rotary drum (12).

  The first and second cables (10) and (11) wound around the rotary drum (12) are respectively hooked on guide members (4a) and (4b) provided at the front end and the rear end of the guide rail (4). While being rotated and routed along the guide rail (4), the connecting portions (10a) and (11a) at the respective ends are connected to the slide door (1).

  The electromagnetic clutch (13) is pivoted inside the electromagnetic coil (131) by the magnetic force generated in the electromagnetic coil (131) when the electromagnetic coil (131) is energized based on the operation of an operation switch (not shown). The armature (133) pivotally supported by the pivot (14) is attracted to the rotor (132) pivotally supported by (14), thereby bringing the power transmission path into a connected state. In this state, when the motor (9) rotates in a predetermined direction, the worm (15) fixed to the rotating shaft of the motor (9), the worm wheel (16) meshing with the worm (15), the worm wheel (16) Gear portion (132a) of rotor (132) meshing with gear (17) rotating integrally with gear (17), Armature (133), Gear (133a) rotating integrally with armature (133), Gear (133a ) And the rotating drum (12) rotates in a predetermined direction via a gear portion (121) provided integrally with the rotating drum (12), and the first cable (10) or the second cable is rotated. Wind up the cable (11). When winding the first cable (10), move the sliding door (1) in the closing direction, and when winding the second cable (11), move the sliding door (1) in the opening direction. Let When the electromagnetic clutch (13) is not energized, the rotor (132) and the armature (133) are disconnected, so that the slide door (1) is manually operated without rotating the motor (9). It can be opened and closed with.

  As shown in FIG. 4, the rotating drum (12) made of synthetic resin has a substantially cylindrical shape in which a spiral groove (122a) for winding the first and second cables (10) and (11) is provided on the outer peripheral surface. A first resin portion (30), in which a drum portion (122) is a main body and a gear portion (121) is provided on one side portion (right side in FIG. 4) of the drum portion (122), and a first resin portion (30 ) Is provided on the other side (left side in FIG. 4), and includes a second resin part (40) molded from a material different from that of the first resin part (30). Either one of the resin parts (40) is used as a primary molding part and the other is used as a secondary molding part for injection molding by a two-color molding method.

  The second resin part (40) is formed by, for example, injection-molding a raw material in which a magnetic powder such as a ferrite powder or a rare earth magnet powder is mixed with a thermoplastic resin, and simultaneously magnetizing a necessary part in the mold. A magnetic part (21) forming a part of the detection means (20) is magnetized to a necessary part of the resin part (40). Many magnetic portions (21) are formed along the circumferential direction of the rotating drum (12) so that the magnetic poles are directed in the radial direction of the rotating drum (12).

  As described above, the detection means (20) is provided so as to be opposed to the magnetic part (21) and the magnetic part (21) provided integrally with the rotary drum (12), and rotates the rotary drum (12). By detecting the change in the magnetic field of the magnetic force part (21) accompanying this, it is configured to include two magnetic sensors (22) that can detect the movement of the sliding door (1).

  Each magnetic sensor (22) is attached to the outer periphery of a drum cover (19) that is fixed to the base bracket (8) and covers the outer peripheral surface of the rotating drum (12) so as to face the magnetic pole of the magnetic part (21). It has been. A Hall element is used as the magnetic sensor (22), and the rotation of the rotating drum (12) is detected from a change in the magnetic field generated by the magnetic force part (21).

  The magnetic sensors (22) are arranged so as to be shifted in the circumferential direction by a predetermined angle with respect to the magnetic force part (21), and the phases of detection signals generated by the same magnetic pole are shifted by 90 degrees. Thus, when the magnetic part (21) rotates together with the rotating drum (12), the magnetic sensor (22) responds to the rotation of the rotating drum (12) in response to the change in the magnetic pole of the opposing magnetic part (21). A cycle detection signal (pulse) is output from a control circuit (not shown). As a result, the control circuit counts the detection signal output from the magnetic sensor (22) to detect the movement and position of the slide door (1).

  As described above, in the present invention, the detection means (20) is provided so as to be opposed to the magnetic part (21) and the magnetic part (21) provided integrally with the rotary drum (12). The detection for detecting the movement of the sliding door (1) as in the prior art by comprising the magnetic sensor (22) for detecting the rotation of the rotating drum (12) by the change of the magnetic field generated by (21). The gear for use becomes unnecessary, and the number of parts can be reduced and the drive unit (6) can be downsized.

  Also, by forming the rotary drum (12) in two colors, the first resin part (30) forming the drum part (122) that requires high strength and the second resin part forming the magnetic part (21) are formed. (40) can be molded with an appropriate synthetic resin material, and the quality of the rotating drum (12) can be improved.

(Second Embodiment)
FIG. 5 shows a second embodiment of the present invention. In this embodiment, the rotating drum (12) has a first concave portion (12a) formed in one rotating surface ( left rotating surface in FIG. 5) of the drum portion (122) formed by the first resin portion (30). It is formed by molding two resin parts (40) in two colors.

  The magnetic part (21a) of the detection means (20) is molded into the second resin part (40) so that its magnetic pole faces the axial direction of the rotating drum (12) (axial direction of the pivot (18)), The magnetic sensor (22a) is attached to the inner surface of the drum cover (19) so as to face the magnetic force part (21a) and to enter the recess (12a). Since other configurations are the same as those of the first embodiment, the same configurations are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.

  With the configuration described above, the magnetic sensor (22a) does not protrude outward from the side surface of the rotating drum (12), and thus the drive unit (6) can be downsized.

(Third embodiment)
FIG. 6 shows a third embodiment of the present invention. In this embodiment, the rotating drum (12) has a side surface in the recess (12b) formed on one rotating surface (the right rotating surface in FIG. 6) of the drum portion (122) formed by the first resin portion (30). The second resin part (40) is formed by two-color molding.

  The magnetic part (21b) of the detection means (20) is molded into the second resin part (40) so that its magnetic pole faces the radial direction of the rotary drum (12), and the magnetic sensor (22b) It is attached to the base bracket (8) so as to face the magnetic part (21b) and to enter the recess (12b). Since other configurations are the same as those of the first embodiment, the same configurations are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.

By configuring as described above, similarly to the second embodiment, since the magnetic sensor (22b) does not project significantly from the side surface of the rotating drum (12) outwardly, reducing the size of the drive unit (6) be able to.

(Fourth embodiment)
FIG. 7 shows a fourth embodiment of the present invention. In this embodiment, the rotating drum (12) is electrically conductive with the conductive binder resin material on one rotating surface (the right rotating surface in FIG. 7) of the drum portion (122) formed by the first resin portion (30). It is formed by adhering a conductive second resin part (50) kneaded with a fine powder (for example, metal powder, carbon, etc.).

  The magnetic part (21c) of the detection means (20) is formed by a magnet and is insert-molded in the second resin part (50) so that the magnetic pole thereof faces the radial direction of the rotary drum (12). The magnetic sensor (22c) is attached to the drum cover (19) so as to face the magnetic force part (21c). Since other configurations are the same as those of the first embodiment, the same configurations are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.

  By configuring as described above, the magnetic part (21c) can be easily provided on the rotating drum (12). In addition, since the magnetic part (21c) is insert-molded in the conductive second resin part (50), the conductivity is increased and reliable detection is possible.

Although the embodiments of the present invention have been described above, the following various modifications and changes can be made to the embodiments without departing from the scope of the present invention.
(I) In the first to third embodiments, the entire rotating means (12) is integrally formed of a raw material obtained by mixing magnetic powder in a plastic resin.
(Ii) In the first to fourth embodiments, instead of the first and second cables (10) and (11), the connecting means is a rack, arm or geared cable that can be pushed and pulled. In this case, instead of forming the drum portion (122), the rotating means (12) is integrally formed with a gear portion that meshes with the connecting means.
(Iii) In the fourth embodiment, the magnetic part (21c) formed by the magnet is bonded or embedded at an appropriate position of the rotary drum (12).
(Iv) Instead of the sliding door (1), the opening / closing body is a back door, a sunroof, or a window opening / closing device.

1 is a perspective view of a vehicle to which a first embodiment of the present invention is applied. It is a side view of a drive unit. It is a longitudinal cross-sectional view which follows the III-III line in FIG. It is a longitudinal cross-sectional view which follows the IV-IV line in FIG. It is sectional drawing of the same site | part as FIG. 4 which shows 2nd Embodiment concerning this invention. It is sectional drawing of the same site | part of FIG. 4, which shows another modification of 3rd Embodiment concerning this invention. It is sectional drawing of the same site | part of FIG. 4 which shows another modification of 4th Embodiment concerning this invention.

Explanation of symbols

(1) Sliding door (opening / closing body)
(2) Body
(3) (4) (5) Guide rail
(4a) (4b) Guide part
(6) Drive unit
(7) Exit
(8) Base bracket
(9) Motor
(10) First cable (connecting means)
(11) Second cable (connecting means)
(10a) (11a) Connecting part
(12) Rotating drum (Rotating means)
(12a) (12b) Recess
(13) Electromagnetic clutch
(14) Axis
(15) Warm
(16) Worm wheel
(17) Gear
(18) Axis
(19) Drum cover
(20) Detection means
(21) (21a) (21b) (21c) Magnetic part
(22) (22a) (22b) (22c) Magnetic sensor
(30) First resin part
(40) (50) Second resin part
(121) Gear part
(122) Drum part
(122a) Spiral groove
(131) Electromagnetic coil
(132) Rotor
(132a) Gear part
(133) Armature
(133a) Gear

Claims (3)

In a vehicle opening / closing device in which an opening / closing body supported to be opened / closed by a vehicle body is opened / closed by a drive unit,
The drive unit includes a motor, a rotating drum made of a synthetic resin that can be rotated by a rotational force of the motor, and the rotational force can be transmitted to the opening / closing body via a cable , and the rotating drum provided in the rotating drum, A magnetic part that can be rotated integrally and a magnetic part that is opposed to the magnetic part, and the movement of the opening / closing body can be detected by detecting a change in the magnetic field of the magnetic part as the rotating drum rotates. With a magnetic sensor ,
The rotating drum includes a first resin portion forming a drum portion provided with a spiral groove around which the cable is wound on an outer peripheral surface, and a raw material obtained by mixing magnetic powder in a synthetic resin with the spiral groove in the first resin portion. A second resin portion integrally formed by two-color molding on the rotating portion other than
The opening / closing apparatus for vehicles , wherein the magnetic part is formed by magnetizing a part of the second resin part facing the magnetic sensor . In a vehicle opening / closing device in which an opening / closing body supported to be opened / closed by a vehicle body is opened / closed by a drive unit,
The drive unit includes a motor, a rotating drum made of a synthetic resin that can be rotated by a rotational force of the motor, and the rotational force can be transmitted to the opening / closing body via a cable, and the rotating drum provided in the rotating drum, A magnetic part that can be rotated integrally and a magnetic part that is opposed to the magnetic part, and the movement of the opening / closing body can be detected by detecting a change in the magnetic field of the magnetic part as the rotating drum rotates. With a magnetic sensor,
The rotating drum is formed of a first resin portion that forms a drum portion provided with a spiral groove around which the cable is wound on an outer peripheral surface, and a conductive material in which a conductive fine powder is kneaded into a synthetic resin. And a second resin portion that is bonded to a rotating portion of the first resin portion other than the spiral groove,
The opening and closing device for a vehicle, wherein the magnetic part is formed by a magnet that is insert-molded in the second resin part. Wherein the magnetic portion is provided in a recess provided on the rotating surface of the rotating drum, the magnetic sensor, a vehicle opening-closing device according to claim 1, characterized in that arranged so as to enter into the recess.

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