JP6832393B2 - Fixed structure of frame and support member in electric retractable visual equipment for vehicles - Google Patents

Description

According to the present invention, in an electrically retractable visual device for a vehicle such as an electrically retractable mirror for a vehicle and an electrically retractable camera for a vehicle, a support having a function of supporting the drive mechanism at a position facing the internal space of a frame accommodating the drive mechanism. Regarding the structure for fixing the member, the deformation of the support member is suppressed to prevent problems such as abnormal noise generated when the motor is operated.

An electrically retractable visual device for a vehicle generally has a structure in which a support member having a function of supporting the drive mechanism is fixed at a position facing the internal space of a frame accommodating the drive mechanism. For example, in the electrically retractable mirror described in Patent Document 1, the support member (17) is screwed at three positions at positions facing the internal space of the frame (2). Further, in the electrically retractable mirror described in Patent Document 2, the support member (50) is screwed at three points at a position facing the internal space (28) of the frame (14). The reference numerals in parentheses are the reference numerals used in Patent Documents 1 and 2.

Japanese Patent Application Laid-Open No. 08-072613 (Fig. 4) JP-A-2002-067805 (Fig. 1)

According to the fixed structure described in Patent Documents 1 and 2, since the support member is generally made of resin, it is easily deformed, and the deformation causes rattling of the drive mechanism, which may generate an abnormal noise when the motor is operated. there were.

The present invention solves the above problems and provides a fixed structure of a frame and a support member that suppresses deformation of the support member and prevents generation of abnormal noise during motor operation.

The fixed structure of the frame and the support member of the present invention includes a shaft erected on the vehicle body side and a visual recognition device rotatably supported by the shaft in the direction around the rotation shaft of the visual recognition device arranged at the center of the shaft. It has a rotating portion and an electric drive mechanism for rotationally driving the visual recognition device rotating portion in a direction around the visual recognition device rotation axis, and the electric drive mechanism is a motor mounted on the visual recognition device rotating portion and driving the motor. The visual recognition device rotating portion has a power transmission mechanism that transmits a force to the shaft to rotate the visual recognition device rotating portion in a direction around the visual recognition device rotating shaft, and the visual recognition device rotating portion is an internal space accommodating the power transmission mechanism. And a support that holds the motor and is fixed to the frame in a state of being arranged at a position facing the internal space of the frame to transmit the rotation of the motor rotation shaft of the motor to the power transmission mechanism. In an electrically retractable visual device for vehicles having such a configuration in which the motor rotating shaft has a member and the motor rotating shaft is arranged substantially parallel to the visual recognition device rotating shaft, the frame and the supporting member are fixed. In the structure, when viewed from the axial direction of the visual recognition device rotation axis, the line connecting the visual recognition device rotation axis and the motor rotation axis is the first line, passes through the motor rotation axis, and is orthogonal to the first line. A line is defined as a second line, and a line passing through the rotation axis of the visual recognition device and orthogonal to the first line is defined as a third line, and the fixed structure is defined as a fixed position between the frame and the support member. The first fixed position existing in the region opposite to the side where the visual recognition device rotation axis exists, the second line, and the said second line when viewed from the axial direction of the visual recognition device rotation axis. Within the region sandwiched by the third line, it has a second fixed position and a third fixed position existing in regions opposite to each other across the first line. According to this, since the first to third fixed positions close to the position where the motor is held are included in the fixed position, the inclination of the motor due to the deformation of the support member is effectively suppressed, and the drive during motor operation is performed. It is possible to smooth the operation of the mechanism and prevent the generation of abnormal noise.

In the fixing structure of the present invention, the screwing points between the frame and the support member can be assumed to exist only at the first to third fixing positions. According to this, it is possible to fix the frame and the support member with a small number of screwing points, suppress the deformation of the support member, and prevent the generation of abnormal noise when the motor is operated.

Another fixed structure of the frame and the support member of the present invention has a visual recognition device rotating portion rotatably arranged in a direction around a predetermined visual recognition device rotation axis by an electric drive mechanism, and the visual recognition device rotating portion is the electric motor. A frame having an internal space for accommodating at least a part of the drive mechanism, and a support member fixed to the frame and supporting at least a part of the electric drive mechanism while being arranged at a position facing the internal space of the frame. In the electric retractable visual recognition device for vehicles having such a configuration, the motor rotating shaft of the electric drive mechanism is arranged substantially parallel to the visual recognition device rotating shaft. It is a fixed structure to be fixed, and the line connecting the visual recognition device rotation axis and the motor rotation axis is the first line, and the line passing through the motor rotation axis is the first line when viewed from the axial direction of the visual recognition device rotation axis. A line orthogonal to the second line is defined as a second line, and a line passing through the rotation axis of the visual recognition device and orthogonal to the first line is defined as a third line, and the fixing structure is fixed to the frame and the support member. The positions are a first fixed position existing in a region opposite to the side where the visual device rotation shaft exists with respect to the second line when viewed from the axial direction of the visual device rotation axis, and the second fixed position. Within the region sandwiched between the line and the third line, the second fixed position and the third fixed position existing in the regions opposite to each other across the first line, and the third line On the other hand, it has a fourth fixed position existing in a region opposite to the side where the motor rotation shaft exists. According to this, by fixing the frame and the support member at the first to fourth positions, the deformation of the support member can be suppressed more reliably, and thereby the operation of the drive mechanism at the time of motor operation can be further suppressed. It can be smoothed and the generation of abnormal noise can be prevented more reliably.

In another fixing structure of the present invention, the screwing points between the frame and the support member can be assumed to exist only at the four fixing positions of the first to fourth places. According to this, it is possible to fix the frame and the support member with a small number of screwing points, suppress the deformation of the support member, and prevent the generation of abnormal noise when the motor is operated.

Further, in the present invention, the electric drive mechanism has an intermediate gear arranged at a position sandwiched between the visual recognition device rotation shaft and the motor rotation shaft when viewed from the axial direction of the visual recognition device rotation shaft. The shaft of the intermediate gear is arranged in a plane orthogonal to the rotation axis of the visual recognition device, and the support member faces both ends of the shaft of the intermediate gear to prevent the intermediate gear from floating from the bearing of the intermediate gear. It is possible to have two holding portions, and the second fixing position and the third fixing position may be arranged at positions close to the two holding portions. According to this, the deformation of the support member is suppressed by the two pressing portions, the intermediate gear is suppressed from floating from the bearing, and the generation of abnormal noise when the motor is operated can be prevented.

The first to third lines and the first to fourth fixed positions according to the present invention are written on the plan view of the frame 36 of FIG. It is an exploded perspective view of the electric retractable door mirror for the right side of the vehicle which concerns on embodiment of this invention. It is an exploded perspective view of the electric storage unit 16 shown in FIG. FIG. 3 is a perspective view of the frame 36 shown in FIG. 3 as viewed from the bottom surface side. It is a perspective view which shows the state in the process of assembling each component of the electric storage unit 16 shown in FIG. It is a figure which shows the state which assembled the door mirror 10 of FIG. 2, and is the cut end view of the position seen by the arrow AA of FIG. It is a plan view showing the assembled state of the door mirror 10 of FIG. 2 (shown with the housing cover removed), and is shown in the posture in which the mirror rotating portion 15 is in the deployed position. It is a top view of the frame 36 shown in FIG. It is an enlarged view of the peripheral portion of the enclosure wall 121 of the frame 36 shown in FIG. 8, and is a perspective view seen from diagonally above the position of arrow B in FIG. It is a top view of the plate outer 68 shown in FIG. It is a bottom view of the plate outer 68 shown in FIG. It is a front view of the plate outer 68 shown in FIG. It is a perspective side view seen from one side surface of the plate outer 68 shown in FIG. It is a side view seen from the other side surface of the plate outer 68 shown in FIG. It is a plan view which shows the assembled state of the part of the electric storage unit 16 shown in FIG. 3, and shows the state which the plate outer (support member) 68 and the seal cap (cover) 90 are removed (the motor 76 is shown). The cut end view of the electric storage unit 16 shown in FIG. 2 at the position seen by the arrow DD in FIG. 15 is shown with the seal cap 90 (FIG. 3) removed. It is a schematic front view which shows how the deformation of a plate outer 68 is suppressed by fixing a frame 36 and a plate outer 68 at the 1st to 4th fixed positions shown in FIG. In the plan view of the frame 36'showing another embodiment of the present invention, the fourth fixed position 117-4 is omitted from the frame 36 of FIG. It is a plan view of the plate outer 68'combined with the frame 36' of FIG. 18, and the fourth fixed position 127-4 is omitted from the plate outer 68 of FIG.

<< Embodiment of 4-point fixing >>
An embodiment of the present invention will be described. FIG. 2 shows an exploded perspective view of an electrically retractable door mirror for the right side of a vehicle to which the present invention is applied. FIG. 2 shows a state in which the mirror rotating portion 15 is viewed from the rear side (front side of the vehicle) in the posture of the deployed position. Further, in FIG. 2, the mirror surface adjusting actuator and the mirror plate arranged in the front opening 14a of the visor 14, the housing cover (reference numeral 17 in FIG. 6) attached to the back side of the visor 14 and the like are not shown. The door mirror 10 includes a mirror base 12, a mirror rotating portion 15, and an electric storage unit 16 connected between the two. The mirror rotating portion 15 has a visor 14. The mirror base 12 is projected from the vehicle body (right door) 13 toward the right side of the vehicle. The electric storage unit 16 has a fixed body 16a at the lower part and a rotating body 16b at the upper part, and the rotating body 16b can rotate in the direction around the mirror rotating shaft 18 with respect to the fixed body 16a. On the back side of the visor 14, the rotating body 16b of the electric storage unit 16 is fixed by screwing two screws 20 into the rotating body 16b of the electric storage unit 16 from the lower surface of the visor 14. The fixed body 16a of the electric storage unit 16 in which the rotating body 16b is fixed to the visor 14 is fixed to the mirror base 12 by screwing three screws 22 from the lower surface of the mirror base 12 into the fixed body 16a of the electric storage unit 16. .. As a result, the mirror rotating portion 15 including the visor 14 is attached and supported on the mirror base 12 so as to be rotatable in the circumferential direction of the mirror rotating shaft 18 via the electric storage unit 16. A housing cover (reference numeral 17 in FIG. 6) (not shown) is attached to the back surface of the visor 14. As a result, the opening 14b on the back surface of the visor 14 is closed by the housing cover 17, and the electric storage unit 16 is housed in the space surrounded by the visor 14 and the housing cover 17. The mirror rotating unit 15 can be rotated by electric drive by the electric storage unit 16 and can be selectively moved to the storage position and the deployment position. Further, the mirror rotating portion 15 can be rotated by an external force and can move from the retracted position to the forward tilted position via the deployed position and vice versa.

The overall configuration of the electric storage unit 16 will be described with reference to FIG. All the parts of FIG. 3 are detachably assembled to form the electric storage unit 16. The electric storage unit 16 has a shaft 24 constituting the fixed body 16a. The shaft 24 is made of an integrally molded product of a reinforced resin such as PA + GF resin (glass fiber reinforced polyamide resin). The shaft 24 has a large-diameter, disc-shaped shaft base 24a at the bottom and a small-diameter, cylindrical shaft shaft 24b at the top coaxially. The shaft 24 is erected vertically to the mirror base 12 by fixing the lower surface of the shaft base 24a to the mirror base 12 with screws 22 (FIG. 2). On the upper surface of the shaft base 24a, three sets of peaks 26b and valleys 26a are alternately arranged in the axial direction of the shaft 24 at the outermost peripheral position, and each set has a mountain valley repeating shape 26 repeatedly arranged 120 degrees. The circumferential length (angle) of one valley 26a is longer than the circumferential length (angle) of one peak 26b. Further, on the upper surface of the shaft base portion 24a, two height maintaining protrusions 28 are connected to the outer peripheral surface of the shaft shaft portion 24b at 180 degree intervals in the axial direction of the shaft 24 at the innermost peripheral position thereof. There is. When the mirror rotating portion 15 moves from the deployed position to the forward tilting position by an external force, the height maintaining protrusion 28 abuts and slides between the height maintaining protrusion 41 of the frame 36, which will be described later, and the top surface of the shaft 24. By maintaining the height of the frame 36 with respect to the frame 36, the mirror rotating portion 15 can be electrically returned from the forward tilted position to the deployed position. Further, on the upper surface of the shaft base portion 24a, a groove-shaped bearing surface 30 having a constant width at a radial position between the mountain valley repeating shape 26 at the outermost peripheral position and the height maintaining protrusion 28 at the innermost peripheral position is the shaft of the shaft 24. It is configured to be annular and flat in the circumferential direction. A resin washer 34 is placed and housed in the groove on the bearing surface 30. The hollow portion 31 of the shaft shaft portion 24b is formed so as to penetrate the shaft base portion 24a. A wire harness (external power supply wiring) (not shown) that supplies power to the electric storage unit 16, the mirror surface adjusting actuator, and the like is passed through the hollow portion 31. On the outer peripheral surface of the shaft shaft portion 24b, five sets of rotation stop recesses 32a and rotation stop protrusions 32b are alternately arranged in the circumferential direction, and each set has a rotation stop shape 32 that is repeatedly arranged at equal intervals. The individual rotation stop recesses 32a and the rotation stop protrusions 32b extend in the axial direction of the shaft 24. The upper end of the rotation stop recess 32a is opened upward in order to allow the mating rotation stop convex portion (the rotation stop convex portion 62b formed on the inner peripheral surface of the clutch plate 58, which will be described later) to be fitted into the rotation stop recess 32a to enter. ing. A groove 35 for inserting and rotating a metal plate 66, which will be described later, is formed on the upper outer peripheral surface of the shaft shaft portion 24b.

A frame 36 of the rotating body 16b (which constitutes a housing of the rotating body 16b together with a seal cap 90 described later) is rotatably supported on the shaft 24. The frame 36 is made of an integrally molded product of a reinforced resin such as PA + GF resin. The frame 36 has an internal space 38 that opens upward. A cylinder 40 is erected on the bottom surface 38a of the internal space 38. The hollow portion 43 of the cylinder 40 penetrates the bottom surface 38a. Here, the configuration of the lower surface of the frame 36 will be described with reference to FIG. 4 after leaving FIG. On the lower surface of the frame 36, a cylinder 39 which is coaxial with the cylinder 40 and has a diameter larger than that of the cylinder 40 and is thicker than the cylinder 40 is projected downward (upper in FIG. 4). On the inner peripheral surface of the cylinder 39, two height-maintaining protrusions 28 (FIG. 3) of the shaft base portion 24a and two height-maintaining protrusions 41 in which the top surfaces abut and slide are provided in the axial direction of the cylinder 39. It is configured to be connected to the inner peripheral surface of the cylinder 39 at intervals of 180 degrees. The inner peripheral surface of the height maintaining protrusion 41 is located at the same radial position as the inner peripheral surface 40a of the cylinder 40, and both inner peripheral surfaces form a continuous surface. The height maintenance protrusions 28 and 41 are in the same radial position. The lower end surface of the cylinder 39 constitutes a bearing surface 45 facing the bearing surface 30 of the shaft 24. An outer cylinder 49 is arranged coaxially with the cylinder 39 on the outer side of the cylinder 39 via a gap 47. In the gap 47, a mountain valley repeating shape 27 that fits into the mountain valley repeating shape 26 (FIG. 3) on the upper surface of the shaft base portion 24a is configured. The mountain valley repeating shape 27 is configured by alternately arranging three sets of peaks 27b and valleys 27a in the axial direction of the cylinder 39, and each set is 120 degrees repeatedly arranged. The circumferential length (angle) of one valley 27a is longer than the circumferential length (angle) of one peak 27b. The mountain 27b is arranged so as to be connected to the outer peripheral surface of the cylinder 39, the inner peripheral surface of the outer cylinder 49, and the bottom surface of the gap 47. A stopper 51 projects downward (upper in FIG. 4) in a part of the peripheral direction of the outer cylinder 49. The stopper 51 is movably inserted into the stopper groove 57 (FIG. 2) formed in the mirror base 12 in the circumferential direction to set the maximum rotation range (from the retracted position to the forward tilted position) of the mirror rotating portion 15. The shaft shaft portion 24b is inserted into the continuous hollow portion 43 of the cylinders 39 and 40 of the frame 36 from the cylinder 39 side. At this time, the bearing surface 45 of the frame 36 is supported by the bearing surface 30 of the shaft 24 with the resin washer 34 interposed therebetween. Further, the inner peripheral surface 40a of the upper cylinder 40 is rotatably supported by the shaft shaft portion 24b. As a result, the frame 36 is rotatably supported by the shaft 24 in the axial direction of the shaft 24. The peak 26b of the mountain valley repeating shape 26 of the shaft 24 enters the gap 47 at the bottom of the frame 36. In this state, the mountain valley repeating shape 26 and the mountain valley repeating shape 27 are locked (or stored) until the inclined surface at the boundary between the mountain 26b and the valley 26a and the inclined surface at the boundary between the mountain 27b and the valley 27a are in contact with each other and locked. As for the direction, the stopper 51 is slidably fitted in the angle range of both rotation directions (until the stopper 51 is locked at one end of the stopper groove 57), and the mirror rotating portion 15 (FIG. 2) has a retracted position and a deployed position. Allow to rotate between. Further, when an external force equal to or higher than a predetermined value is applied to the mirror rotating portion 15 at the deployed position, the ridges 26b and 27b tilt each other against the urging force of the coil spring 64 described later. It slides up the surface, climbs on the top surface of the other mountain, releases the mating of the mountain valley repeating shape 26 and the mountain valley repeating shape 27, and allows the mirror rotating portion 15 to rotate to the forward tilting position. On one side of the frame 36, screw through holes 46 for screwing and fixing the frame 36 to two upper and lower bosses 44 (FIG. 2) on the back surface of the visor 14 are configured. In this embodiment, three screw-through holes 46 are provided at the top, middle, and bottom. Of these, screws (not shown) are inserted into the two screw-through holes 46 at the top and bottom to form the bosses 44 at the top and bottom. By screwing in, the frame 36 is fixed to the back surface of the visor 14.

Returning to FIG. 3, the resin washer 48 is loosely mounted on the outer circumference of the cylinder 40 in the internal space 38 of the frame 36. The resin washer 48 is placed and supported on the bottom surface 38a of the internal space 38. The resin washer 48 is the same product as the resin washer 34. The resin worm wheel 50 is inserted into the shaft 52a of the metal worm 52, and both are assembled so as not to rotate relative to each other. The assembled worm wheel 50 and worm 52 are housed in the internal space 38 of the frame 36 and arranged in a predetermined position, and the lower surfaces of both ends 52b and 52c of the shaft 52a of the worm 52 are bearings in the internal space 38 (FIG. 8). It is mounted and supported by reference numerals 38b and 38c) (see FIG. 15). As a result, the worm wheel 50 and the worm 52 rotate integrally in the internal space 38. The axis 52a of the worm 52 is arranged in a plane orthogonal to the mirror rotation axis 18. A shaft extrapolation gear 54 is rotatably mounted on the outer periphery of the cylinder 40 in the internal space 38 of the frame 36. The shaft extrapolation gear 54 is made of an integrally molded product of a reinforced resin such as PA + GF resin. At the center of the shaft extrapolation gear 54, a cylinder 40 of the frame 36 and a hollow portion 55 into which the shaft shaft portion 24b is rotatably inserted are configured. The bearing surface 106 (FIG. 6) on the lower surface of the shaft extrapolation gear 54 is slidably mounted and supported on the resin washer 48 (FIG. 6). On the outer peripheral surface of the shaft extrapolation gear 54, gear teeth 54b made of spiral teeth are formed to form a worm wheel. The gear teeth 54b are meshed with the worm 52 to form a worm gear. On the upper surface of the shaft extrapolation gear 54, five sets of clutch valleys 56a and clutch ridges 56b are alternately arranged in the axial direction of the shaft extrapolation gear 54, and each set has a shaft extrapolation gear side clutch surface 56 repeatedly arranged at equal intervals. It is configured. The circumferential length (angle) of one clutch valley 56a and the circumferential length (angle) of one clutch ridge 56b are set to be equal.

A clutch plate 58 is inserted into the shaft shaft portion 24b on the shaft extrapolation gear 54 and is placed and supported concentrically. The clutch plate 58 is made of an integrally molded product of a reinforced resin such as PA + GF resin. A hollow portion 59 is formed in the central portion of the clutch plate 58 into which the shaft shaft portion 24b is inserted so as to be non-rotatable and movable in the axial direction. On the lower surface of the clutch plate 58, five sets of clutch valleys 60a and clutch ridges 60b are alternately arranged in the axial direction of the clutch plate 58, and shaft-side clutch surfaces 60 are formed in which each set is repeatedly arranged at equal intervals. The shaft extrapolation gear side clutch surface 56 and the shaft side clutch surface 60 form a clutch mechanism 61. The circumferential length (angle) of one clutch valley 60a of the shaft-side clutch surface 60 and the circumferential length (angle) of one clutch ridge 60b are set to be equal. Further, the inner diameter and the outer diameter of the shaft extrapolated gear side clutch surface 56 and the shaft side clutch surface 60 are the same. Therefore, the clutch valley 56a and the clutch ridge 56b of the shaft extrapolated gear side clutch surface 56 fit into the clutch ridge 60b and the clutch valley 60a of the shaft side clutch surface 60 without rattling. The step at the boundary between the clutch valley 56a and the clutch ridge 56b and the step at the boundary between the clutch valley 60a and the clutch ridge 60b are formed by inclined surfaces having the same inclination angles. As a result, the engagement between the shaft extrapolation gear side clutch surface 56 and the shaft side clutch surface 60 can be disengaged by the rotational force acting between the two clutch surfaces 56 and 60. On the inner peripheral surface of the clutch plate 58, a rotation stop shape 62 in which five sets of rotation stop recesses 62a and rotation stop protrusions 62b are arranged in the circumferential direction is formed so as to extend in the axial direction. The rotation stop recess 62a and the rotation stop convex portion 62b face each other of the rotation stop convex portion 32b and the rotation stop recess 32a formed on the outer peripheral surface of the shaft shaft portion 24b with a slight gap. As a result, the rotation stop recess 62a and the rotation stop convex portion 62b are fitted to the rotation stop convex portion 32b and the rotation stop recess 32a so as to be non-rotatable in the axial direction and slidable in the axial direction. As a result, the clutch plate 58 is attached to the shaft shaft portion 24b so as not to rotate in the axial direction of the shaft shaft portion 24b and to be movable in the axial direction.

A coil spring 64 is inserted into the shaft shaft portion 24b and placed and supported concentrically on the clutch plate 58. A metal plate 66 is inserted into the shaft shaft portion 24b on the coil spring 64 while pressing and compressing the coil spring 64. The metal plate 66 is mounted on the upper part of the shaft shaft portion 24b by inserting and rotating the protrusion 66a formed on the inner peripheral surface of the metal plate 66 along the groove 35 formed on the upper outer peripheral surface of the shaft shaft portion 24b. To. As a result, the coil spring 64 is mounted on the shaft shaft portion 24b in a compressed state. At this time, the extension force of the coil spring 64 acts between the upper surface of the clutch plate 58 and the lower surface of the metal plate 66. Due to this extension force, between the mountain valley repeat shape 26 on the upper surface of the shaft base 24a and the mountain valley repeat shape 27 (FIG. 4) on the lower surface of the frame 36, and with the shaft extrapolation gear side clutch surface 56 on the upper surface of the shaft extrapolation gear 54. A fitting force is applied between the lower surface of the clutch plate 58 and the shaft-side clutch surface 60. However, when the mirror rotating portion 15 is between the retracted position and the deployed position, the extension force applied from the coil spring 64 to the frame 36 is received from the bearing surface 45 via the resin washer 34 on the bearing surface 30 to receive the mirror. Since the rotation of the rotating portion 15 is performed by sliding the bearing surfaces 45 and 30 with the resin washer 34 sandwiched between them (that is, the mirror rotating portion is slid with the bearing surfaces 45 and 30 sandwiching the resin washer 34 with each other). (Because it supports the rotation of 15), the facing surfaces of the Yamatani repeating shapes 26 and 27 are separated from each other and do not slide in contact with each other (see FIG. 6).

After assembling all the parts shown on the right side of FIG. 3, the plate outer (support member) 68 is placed on the step portion 36b on the inner peripheral side of the opening 36a at the upper end of the frame 36, and the opening 36a is closed. The plate outer 68 is made of an integrally molded product of a resin such as POM (polyacetal). The plate outer 68 has a tubular portion 72 for accommodating and holding the motor 76 on the upper surface, an upper portion of a shaft shaft portion 24b protruding upward from the opening 36a of the frame 36, a coil spring 64, and a dome 74 surrounding the metal plate 66. As a result, the motor 76 is arranged at a lateral position of the shaft shaft portion 24b so that the rotation shaft of the motor 76 (motor rotation shaft 76a, FIG. 5, etc.) is parallel to the shaft of the shaft 24 (corresponding to the mirror rotation shaft 18). Will be. A round hole 74a is provided in the central portion of the dome 74 so as to project the upper portion of the shaft shaft portion 24b. Before the plate outer 68 is put on the frame 36, the motor 76 is inserted into the tubular portion 72 from above and mounted on the plate outer 68. The motor shaft (motor output shaft) 78 of the motor 76 penetrates the hole 73a formed in the central portion of the bottom portion 73 (FIGS. 6 and 10) in the tubular portion 72, and vertically downwards below the plate outer 68. It protrudes into. A worm 80 is attached to the motor shaft 78. The plate outer 68 is placed on the step portion 36b on the inner peripheral side of the opening 36a of the frame 36 while holding the motor 76 and the worm 80 in this way. At this time, the worm 80 is meshed with the worm wheel 50 to form a worm gear. Further, the worm 80, the worm wheel 50, the worm 52, the shaft extrapolation gear 54, and the clutch plate 58 form a power transmission mechanism 81 that transmits the driving force of the motor 76 to the shaft shaft portion 24b, and the internal space 38 of the frame 36. It is housed and held in. The motor 76 and the power transmission mechanism 81 constitute an electric drive mechanism 87. Further, the lower end surfaces of the two projecting pieces 77 (holding portions, FIGS. 11, 12, and 14) that are formed so as to project downward from the lower surface of the plate outer 68 are both end portions 52b of the shaft 52a of the worm 52. The worm 52 and the worm wheel 50 are restricted from moving upward by facing each other on the upper surface of the 52c with a slight gap. After the plate outer 68 is placed on the step portion 36b on the inner peripheral side of the opening 36a of the frame 36, the plate outer 68 is fixed to the frame 36 with four screws 82.

After the plate outer 68 is fixed to the frame 36, the circuit board (in other words, the space between the motor 76 and the shaft shaft portion 24b) 75 between the tubular portion 72 and the dome 74 on the upper surface of the plate outer 68. The printed circuit board) 84 is arranged upright. Since the shaft extrapolation gear 54 is made of a resin-based material, the shaft extrapolation gear 54 is compared with the metal shaft extrapolation gear in order to secure the strength required as the shaft extrapolation gear. It has a large diameter. Along with this, the space 75 between the motor 76 and the shaft shaft portion 24b has been expanded, so that the circuit board 84 is equipped with the connector receiver (socket) 88 and the like, so that the total thickness including the mounted parts is increased. The circuit board 84 can be easily arranged in the space 75 even if the circuit board is thick. The circuit board 84 has a motor drive circuit that supplies drive power to the motor 76, and a motor connection terminal 86 (male terminal) that connects the motor drive circuit and the terminal 85 (motor terminal, female terminal, FIG. 7) of the motor 76. ) And the connector 89 (FIG. 7) at the tip of the wire harness (not shown) are inserted to connect the wire harness and the motor drive circuit to the connector receiver 88 (socket, connector receiver). A connector connection terminal 91 (FIG. 7) that is electrically connected to a terminal (not shown) of the connector 89 at the tip of the wire harness is arranged in the connector receiver 88. The lower end 84a of the circuit board 84 is inserted and supported by a groove 75a formed at the bottom of the space 75 between the tubular portion 72 of the plate outer 68 and the dome 74, and the tip of the motor connection terminal 86 is inserted into the motor terminal 85. Is supported. As a result, the circuit board 84 is arranged upright in the space 75, and the motor connection terminal 86 and the motor terminal 85 are electrically connected.

After the plate outer 68 is fixed to the frame 36 and the circuit board 84 is attached to the plate outer 68, the seal cap 90 is put on the plate outer 68. The seal cap 90 is made of an integrally molded product of a resin such as PP (polypropylene). A round hole 92 communicating with the upper opening 31a of the hollow portion 31 of the shaft shaft portion 24b is formed on the upper surface of the seal cap 90. Further, on one side surface of the seal cap 90, a connector insertion port 94 communicating with the connector insertion port 88a (FIG. 5) of the connector receiver 88 of the circuit board 84 is provided. Further, claw locking frames 98 are configured at four locations around the opening 96 at the lower end of the seal cap 90. When the seal cap 90 is put on the plate outer 68 and pressed, the claws 100 projecting around the upper outer peripheral surface of the frame 36 engage with the claw locking frame 98 of the seal cap 90. As a result, the frame 36 and the seal cap 90 are connected, and the electric storage unit 16 is integrally assembled. A wire harness is passed through the hollow portion 31 of the shaft shaft portion 24b of the electric storage unit 16 assembled in this manner. The wire harness includes wiring for the electric storage unit 16, wiring for an actuator for adjusting the mirror surface, wiring for a turn lamp, and the like, depending on the function mounted on the door mirror 10. The end of the wire harness on the mirror rotating portion 15 side is discharged from the round hole 92 of the seal cap 90. The end portion of the wire harness on the vehicle body side is discharged from the lower end of the hollow portion 31 of the shaft 24 and guided into the vehicle body. A connector is attached to the end of each wiring of the wire harness on the mirror rotating portion 15 side. Of these, the connector 89 (FIG. 7) at the tip of the wiring for the electric storage unit 16 is inserted into the connector insertion port 94 and connected to the connector receiver 88 of the circuit board 84.

In FIG. 5, each component shown on the right side of FIG. 3 is assembled, and the plate outer 68 holding the motor 76 and the worm 80 is fitted to the inner peripheral side of the opening 36a at the upper end of the frame 36, and the frame is formed by four screws 82. The state of assembling the circuit board 84 and the seal cap 90 to the product in the process of assembling fixed to 36 is shown. In FIG. 5, the holding state of the motor main body portion 69 with respect to the tubular portion 72 of the plate outer 68 is well shown. That is, in the motor 76, the entire motor body 69 is buried and held in the internal space 129 of the cylinder 72 of the plate outer 68 with the motor shaft 78 (FIG. 3) facing downward, and the motor rotation shaft 76a with respect to the cylinder 72 is held. The movement in the direction orthogonal to and the rotation in the direction around the motor rotation shaft 76a are locked. Further, in the motor 76, the movement of the motor rotation shaft 76a in the direction with respect to the tubular portion 72 is locked by the claw engaging piece 139. The details of this motor holding configuration will be described later. The circuit board 84 is inserted into the space 75 between the tubular portion 72 on the upper surface of the plate outer 68 and the dome 74, the lower end 84a of the circuit board 84 is detachably inserted into the groove 75a of the plate outer 68, and the motor connection terminal 86 The tip of the is detachably inserted into the motor terminal 85 (FIG. 7). In this way, the circuit board 84 is detachably supported by the groove 75a and the motor terminal 85, so that the circuit board 84 can be assembled to the product in an upright posture in the space 75. After the circuit board 84 is assembled, the seal cap 90 is covered from above, the claw 100 of the frame 36 is detachably engaged with the claw locking frame 98 of the seal cap 90, and the seal cap 90 is assembled to the product. .. After the seal cap 90 is assembled to the product, a wire harness is passed through the hollow portion 31 of the shaft shaft portion 24b. When the seal cap 90 is assembled to the product, the connector insertion port 88a of the connector receiver 88 of the circuit board 84 and the connector insertion port 94 of the seal cap 90 communicate with each other, and the connector of the wiring for the electric storage unit 16 of the wire harness. The 89 is inserted from the connector insertion port 94 into the connector insertion port 88a, and is ready to be connected to the connector receiver 88.

FIG. 6 shows a door mirror 10 having the above configuration cut at a position passing through the central shafts 18, 76a of the shaft 24 and the motor 76. This corresponds to the cut end face structure at the position of arrow AA in FIG. 7. FIG. 6 shows a state in which the housing cover 17 is attached to the visor 14, the mirror rotating portion 15 is in the deployed position, and the shaft extrapolated gear side clutch surface 56 and the shaft side clutch surface 60 are engaged. Shown. At this time, the mountain valley repeating shape 26 and the mountain valley repeating shape 27 do not appear in FIG. 6, but the inclined surface at the boundary between the mountain 26b and the valley 26a and the inclined surface at the boundary between the mountain 27b and the valley 27a are in contact with each other. It has been stopped. When a storage command is given by operating the mirror switch from the expanded position shown in FIG. 6, the motor 76 is started. The rotation of the motor 76 is transmitted to the shaft extrapolation gear 54 via the worm 80, the worm wheel 50, and the worm 52. At this time, the shaft external gear side clutch surface 56 and the shaft side clutch surface 60 are engaged with each other, and the shaft external gear 54 cannot rotate with respect to the shaft shaft portion 24b. Therefore, instead, the frame 36 is placed around the shaft of the shaft shaft portion 24b. A force acts to rotate the direction. As a result, the bearing surface 30 and the bearing surface 45 slide with the resin washer 34 in between, and the bottom surface 38a of the internal space 38 of the frame 36 and the bearing surface 106 on the lower surface of the shaft external gear 54 sandwich the resin washer 48. The mirror rotating portion 15 rotates in the retracting direction. When the rotation of the mirror rotating portion 15 is physically stopped by the engagement between the stopper 51 (FIG. 4) and one end of the stopper groove 57 (FIG. 2) at the retracted position, the stop is detected and the motor 76 is driven. It will be stopped. With this, the mirror rotating portion 15 is held at the storage position. When a deployment command is given by operating the mirror switch from this state, the motor 76 is started in the opposite direction, and the mirror rotating portion 15 rotates in the deployment direction. The rotation of the mirror rotating portion 15 is stopped at the unfolded position by the engagement between the inclined surface of the boundary between the peak 26b and the valley 26a of the mountain valley repeating shape 26 and the inclined surface of the boundary between the peak 27b and the valley 27a of the mountain valley repeating shape 27. Then, the stop is detected and the drive of the motor 76 is stopped. With this, the mirror rotating portion 15 is held in the deployed position.

FIG. 7 shows a state in which the door mirror 10 of FIG. 2 is assembled and mounted on a vehicle, and the mirror rotating portion 15 is viewed from above with the mirror rotating portion 15 in the deployed position. FIG. 7 shows the state in which the housing cover 17 (FIG. 6) is removed and the inside of the electric storage unit 16 is seen through, and the connector 89 of the wiring for the electric storage unit 16 of the wire harness is attached to the connector receiver 88 with the rubber packing 101. Shown with the connector attached. In FIG. 7, in the circuit board 84, the motor connection terminal 86 is inserted into the motor terminal 85, and the lower end 84a of the circuit board 84 is inserted into the groove 75a (FIGS. 3, 5, and 6) formed in the plate outer 68. In the supported state, the whole is vertically arranged in the space 75 between the motor 76 and the shaft shaft portion 24b.

The configuration of the frame 36 in the internal space 38 will be described with reference to FIGS. 8 and 9. FIG. 9 is a view of the frame 36 viewed from diagonally above the position of arrow B in FIG. 8 in the direction of arrow B. For ease of understanding, FIG. 8 shows a region on the inner peripheral side of the opening 36a of the frame 36, which is located at a relatively high position (a shallow position within the opening 36a) and is painted in gray. In the internal space 38 of the frame 36, in addition to the configurations already described, the worm wheel accommodation space 111, the enclosure wall 121, the inner peripheral side space 113 of the enclosure wall 121, the outer peripheral side space 123 of the enclosure wall 121, and the internal space A communication passage 115 for communicating the 38 and the inner peripheral side space 113, four screw holes 117 (117-1, 117-2, 117-3, 117-4) and the like are configured. The enclosure wall 121 has an annular portion (cylindrical portion) 121a having an annular shape in the axial direction and having a circumferential angular range (perimeter) of a semicircle (180 degrees) or more. The outer diameter of the annular portion 121a is smaller than the outer diameter of the motor main body portion 69. Further, the surrounding wall 121 has an opening 126 in a part of the circumferential direction of the annular portion 121a (the region facing the worm wheel accommodating space 111). The enclosure wall 121 has flat portions 121b and 121c that are connected to both ends of the opening 126 and face each other in parallel, and a communication passage 115 is formed between the flat portions 121b and 121c. Further, the surrounding wall 121 has folded portions 121d and 121e which are connected to both ends of the flat portions 121b and 121c and are folded outward from each other. Both ends of the folded portions 121d and 121e are connected to a portion 36c (in this embodiment, the outer wall of the frame 36) located on the outer peripheral side of the outer peripheral side space 123 of the frame 36. As a result, the enclosure wall 121 is configured such that the axially visible shape is substantially "Ω" as a whole with a constant wall thickness. The worm wheel accommodating space 111 accommodates the worm wheel 50 coaxially fixedly mounted on the shaft 52a of the worm 52. At this time, both ends 52b and 52c of the shaft 52a of the worm 52 are supported by the bearings 38b and 38c. The inner peripheral side space 113 is composed of a columnar space having a diameter larger than that of the worm 80 and a closed bottom, and accommodates the worm 80 coaxially. The communication passage 115 communicates the worm wheel accommodating space 111 with the inner peripheral side space 113, and allows the outer peripheral surface of the worm wheel 50 to enter the inner peripheral side space 113 through the communication passage 115, so that the worm wheel 50 and the worm 80 communicate with each other. Try to mesh. The four screw holes 117 are screw holes for screwing the four screws 82 (FIG. 3) for fixing the plate outer 68 on the frame 36. At the bottom of the inner peripheral side space 113, a bearing recess 93 having a diameter smaller than the general diameter of the inner peripheral side space 113 is formed. The bearing recess 93 is filled with grease, and the tip 80a (FIG. 16) of the worm 80 is accommodated and supported by a bearing. The upper portion of the inner peripheral side space 113 constitutes a recess 113a having a circular axial shape. A convex portion 119 (FIGS. 11, 12, etc.) on the lower surface of the plate outer 68 is accommodated and fitted in the recess 113a without any gap (or almost no gap) around the recess 113a except for a portion facing the communication passage 115 (FIG. 11). 16, FIG. 6). The convex portion 119 has a circular shape in the axial direction like the concave portion 113a, and a hole 73a (, FIGS. 16 and 6) for passing the motor shaft 78 is formed in the central portion thereof. The convex portion 119 has a concave portion 119a (FIG. 11) having a circular axial shape on the inner peripheral side, and the convex portion 119 is formed in a cylindrical shape having a constant wall thickness. The bottom of the recess 119a is closed and a hole 73a is formed at the center of the recess. The concave portion 119a functions as a lightening portion of the convex portion 119, suppresses sink marks associated with resin molding of the plate outer 68, and enhances the molding accuracy of the convex portion 119. By fitting the convex portion 119 into the concave portion 113a, the outer peripheral surface of the convex portion 119 is supported by surrounding the inner peripheral surface of the concave portion 113a with a region of half a circumference (180 degrees) or more. As a result, the motor shaft 78 protruding from the central hole 73a of the convex portion 119 is positioned on the central axis of the inner peripheral side space 113. The open end surface 113b of the recess 113a is configured as an inwardly inclined surface, facilitating the entry of the convex portion 119 into the recess 113a. The outer peripheral side vacant space 123 is a space in which the axially visible shape is continuous in an annular shape (generally a “C” shape) along the outer circumference of the enclosure wall 121 and is concentric with the enclosure wall 121 and has a closed bottom. It is configured in. The outer peripheral portion of the outer peripheral side space 123 constitutes the outer wall of the frame 36. The depth of the outer peripheral side vacant space 123 reaches a position deeper than the vertical central portion of the inner peripheral side vacant space 113. The outer peripheral side vacant space 123 functions as a lightening portion of the outer wall of the frame 36 at the outer peripheral position of the inner peripheral side vacant space 113, suppresses sink marks due to resin molding of the frame 36, and forms the inner peripheral side vacant space 113 with molding accuracy. Is increasing. The convex portion 119 of the plate outer 68 has improved molding accuracy due to the recess 119a, and the concave portion 113a of the frame 36 has improved molding accuracy due to the outer peripheral side recess 123. Therefore, the motor for the inner peripheral side space 113 The positioning accuracy of the shaft 78 in the plane direction orthogonal to the axis of the motor shaft 78 is improved. As a result, the meshing state of the worm 80 and the worm wheel 50 is maintained in a normal state, and the operating noise when the worm 80 and the worm wheel 50 mesh and rotate is maintained at a normal level, and the worm 80 and the worm are wormed. The load on the wheel 50 can be reduced.

The configuration of the plate outer 68 constituting the support member will be described with reference to FIGS. 10 to 14. The plate outer 68 has a structure in which a tubular portion 72 and a dome 74 are arranged side by side with a space 75 interposed therebetween, perpendicular to the upper surface of the flat plate-shaped portion 125. The plate-shaped portion 125 is placed and supported on the frame 36 with its lower surface peripheral portion 125a (FIG. 11 or the like) in contact with the step portion 36b (FIG. 8) on the inner peripheral side of the opening 36a at the upper end of the frame 36. To. Two projecting pieces 77 are projected downward from the lower surface of the plate-shaped portion 125. The lower end surface of the projecting piece 77 faces the upper surfaces of both ends 52b and 52c of the shaft 52a of the worm 52 (FIG. 15) with a slight gap, respectively, and the worm 52 and the worm wheel 50 move upward. regulate. In the in-plane peripheral portion of the plate-shaped portion 125, four screws communicating with the four screw holes 117 (117-1, 117-2, 117-3, 117-4, FIG. 8) of the frame 36, respectively. Through holes 127 (127-1, 127-2, 127-3, 127-4) have been opened. The plate outer 68 is placed and supported on the step portion 36b on the inner peripheral side of the opening 36a at the upper end of the frame 36, and four screws 82 (FIG. 3) are screwed into the screw holes 117 through the screw-through holes 127 to form the plate outer 68. 68 is fixed to the frame 36.

The configuration of the tubular portion 72 will be described. In FIGS. 10 to 14, the tubular portion 72 has an internal space 129 that accommodates and holds the motor main body portion 69 (FIG. 16 and the like). The depth of the internal space 129 (the height from the surface of the bottom 73 of the internal space 129 to the opening end 129a) is the axial length of the motor main body 69 (from the front end surface 69a to the rear end surface 69b of the motor main body 69). The entire motor body 69 is accommodated in the internal space 129 of the cylinder 72, which is longer than the length). The tubular portion 72 has a pair of arcuate surface portions 72a and 72b facing each other and a pair of flat surface portions 72c and 72d facing each other according to the shape of the motor main body portion 69 (FIG. 10 and the like). The internal space 129 opens upward, and the motor 76 can enter the internal space 129 from the opening end 129a. On the peripheral wall surface of the internal space 129, a plurality of ridges 131 (FIGS. 10 and 13) for abutting the outer peripheral surface of the motor 76 and holding the motor 76 in the internal space 129 without rattling are vertically oriented. It is configured to extend to. That is, the ridges 131 are provided at the bottom of the internal space 129 at a total of six locations, one at the center of the arcuate surfaces 72a and 72b in the width direction and two at both ends of the flat surfaces 72c and 72d in the width direction. It extends from the surface position of 73 to the height position of the central portion of the internal space 129. The upper end surface 131a (FIG. 13) of the ridge 131 is provided with a motor body so that the front end surface 69a of the motor body 69 is not caught by the upper end surface 131a and locked when the motor body 69 is inserted into the internal space 129. It is configured on an inclined surface that is inclined in the approach direction of the portion 69. The flat surface portion 72c of the tubular portion 72 is configured with a notch 133 opened upward (FIG. 13 and the like). The motor connection terminal 86 of the circuit board 84 is connected to the motor terminal 85 through the notch 133 (FIGS. 5 and 7). Notches 135 and 137 are vertically formed along the boundary line of the boundary portion at the boundary portion between the flat surface portion 72d and the arc surface portion 72a of the tubular portion 72 and the boundary portion between the flat surface portion 72d and the arc surface portion 72b (cylinder portion 72). (Axial direction of the internal space 129) of the above (FIG. 13, FIG. 14, etc.). The upper ends of the notches 135 and 137 are open to the upper ends of the tubular portion 72 (opening ends 129a of the internal space 129). The lower ends of the notches 135 and 137 are located substantially in the middle of the tubular portion 72 in the vertical direction. The upper half portion of the tubular portion 72 is separated in the circumferential direction by the notches 135 and 137, and the separated portion constitutes the claw engaging piece 139. That is, the claw engaging piece 139 is formed in a part in the circumferential direction of the upper half portion of the tubular portion 72. The lower end of the claw engaging piece 139 is connected to the lower half of the tubular portion 72 as a fixed end 139a, and the upper end of the claw engaging piece 139 constitutes a free end 139b. As a result, the claw engaging piece 139 can be elastically deformed and flexed in the inward and outward directions of the tubular portion 72 by an external force with the fixed end 139a as a fulcrum. The tip of the free end 139b is at the same height as the open end 129a of the internal space 129 of the tubular portion 72. The claw engaging piece 139 is located inside the leg portion 141 supported by the fixed end 139a and the inner peripheral surface of the central portion in the width direction of the leg portion 141 at a position immediately below the free end 139b at the upper part of the leg portion 141. It has an engaging claw 143 projecting so as to face the space 129. The width of the leg 141 is much wider than the width of the engaging claw 143. Even if the width of the opening 145 described later is subtracted from the width of the leg portion 141, it is still wider than the width of the engaging claw 143. Therefore, the leg portion 141 is configured to have high rigidity. The lower surface (undercut surface) of the engaging claw 143 constitutes an engaging surface 143a which is a surface substantially orthogonal to the approach direction of the motor 76. The engaging surface 143a is arranged at a position below the opening end 129a of the internal space 129 (that is, a position behind the opening end 129a of the internal space 129). The engaging surface 143a abuts on the rear end surface 69b of the motor body 69 and locks the movement of the motor body 69 in the direction of exiting the internal space 129. The upper surface of the engaging claw 143 has an inclined surface 143b. An opening 145 is formed in the central portion of the leg portion 141 in the width direction so as to extend linearly downward from a position immediately below the engaging surface 143a. The width of the opening 145 is configured to be equal to or wider than the width of the engaging surface 143a. Since the width of the leg portion 141 is wider than the width of the engaging claw 143, it is possible to design the leg portion 141 to form the opening 145. The upper end surface 145a (FIG. 14) of the opening 145 is configured at the same height as the engaging surface 143a. The opening 145 is opened by inserting a slide mold into this position during resin molding of the plate outer 68 to form an engaging surface 143a which is an undercut surface.

In FIGS. 10 to 14, a hole 73a for discharging the motor shaft 78 from the internal space 129 is arranged at the center of the bottom 73 of the internal space 129 of the tubular portion 72, and a hole 73a is arranged concentrically with the hole 73a on the outer peripheral side of the hole 73a. A flat circular recess 147 is configured (FIG. 10). A convex portion 149 having a circular axial shape, which is coaxial with the motor shaft 78, is fitted in the concave portion 147 at the center of the front end surface 69a (FIG. 16) of the motor main body portion 69. As a result, the axis of the motor shaft 78 penetrating the hole 73a is positioned with high accuracy at the center of the hole 73a. At the four corners of the bottom 73 of the internal space 129 of the tubular portion 72, a support base 151 having a minute height that abuts on the four corners of the front end surface 69a of the motor main body 69 and supports the front end surface 69a is projected. (Fig. 10). The height from the surface of the support base 151 to the engaging surface 143a is set to exactly the axial length of the motor main body 69 (the length from the front end surface 69a to the rear end surface 69b of the motor main body 69).

FIG. 15 is a plan view of the electric storage unit 16 shown with the plate outer 68 and the seal cap 90 removed. FIG. 16 shows a cut end view of FIG. 15 at the position seen by the arrow DD. The arrangement of FIG. 16 will be described. The plate outer 68 is abutted and supported by the step portion 36b of the frame 36, and is fixed to the frame 36 with screws 82 (FIG. 3). The motor main body 69 is housed and held in the tubular portion 72 of the plate outer 68. The engaging surface 143a of the claw engaging piece 139 is engaged with the rear end surface 69b of the motor main body 69. As a result, the return of the motor 76 to the tubular portion 72, that is, the movement in the direction opposite to the approach direction to the internal space 129 is prevented. The worm 80 is loosely mounted on the motor shaft 78. The motor shaft 78 has a round bar portion 78a formed on the base end side and an engaging bar portion 78b formed on the tip end side along the axial direction thereof. The center hole 83 of the worm 80 into which the motor shaft 78 is inserted is formed with a round hole 83a for accommodating the round bar portion 78a on the base end side along the axial direction thereof, and is engaged with accommodating the engaging rod portion 78b on the tip end side. The joint hole portion 83b is configured. Since the engaging rod portion 78b and the engaging hole portion 83b have a non-circular cross section, they engage in the rotational direction. As a result, when the motor shaft 78 rotates, the worm 80 rotates in accordance with the rotation of the motor shaft 78, and the worm wheel 50 rotates in accordance with the rotation of the worm 80.

The fixed positions of the frame 36 and the plate outer (support member) 68 by the four screws 82 (FIG. 3) in the door mirror 10 described above will be described. FIG. 1 shows the positions of the screw holes 117-1 to 117-4 corresponding to the first to third lines L1 to L3 and the first to fourth fixed positions according to the present invention on the plan view of the frame 36 of FIG. I filled it out. As shown in FIG. 1, when viewed from the axial direction of the mirror rotating shaft 18, the line connecting the mirror rotating shaft 18 and the motor rotating shaft 76a passes through the first line L1 and the motor rotating shaft 76a and is orthogonal to the first line L1. The line to be used is defined as the second line L2, the line passing through the mirror rotation axis 18 and orthogonal to the first line L1 is defined as the third line L3, and the screw holes 117-1 to 117 corresponding to the four fixed positions are defined. -4 are placed in the following positions respectively.

-Screw hole 117-1 (first fixed position): Position opposite to the side where the mirror rotation shaft 18 exists with respect to the second line L2-Screw hole 117-2 (second fixed position): Second Within the area sandwiched between the first line L2 and the third line L3, the position on one side of the first line L1 ・ Screw hole 117-3 (third fixed position): The second line L2 and the third Within the region sandwiched between the 3rd line L3, the position opposite to the screw hole 117-2 with the 1st line L1 in between. ・ Screw hole 117-4 (4th fixed position): In the 3rd line L3 On the other hand, the position opposite to the side where the motor rotation shaft 76a exists

Further, the screw holes 117-2 and 117-3 (second and third fixed positions) are arranged at positions close to the bearings 38b and 38c. In particular, here, the screw holes 117-2 and 117-3 are arranged on both sides of the center line M of the shaft 52a of the worm 52. Both ends 52b, 52c (FIG. 15) of the shaft 52a of the worm 52 are supported on the bearings 38b, 38c, and the lower end surfaces of the two projecting pieces 77 (holding portions) on the lower surface of the plate outer 68 are the both ends 52b. , 52c face each other with a slight gap, and the worm 52 and the worm wheel 50 are restricted from moving upward. The four screw holes 127-1 to 127-4 of the plate outer 68 are arranged at positions communicating with the four screw holes 117-1 to 117-4 of the frame 36, respectively.

FIG. 17 shows the action of the arrangement of the four fixed positions in FIG. Since the plate outer 68 is made of resin, it is deformed so that both sides in the longitudinal direction warp upward as shown by arrow E after molding, or both sides in the longitudinal direction warp downward as shown by arrow E'. It transforms like this. The same applies to the lateral direction. Arrows F1 to F4 in FIG. 17 indicate the directions of fixing forces for fixing the plate outer 68 to the frame 36 by screws 82 at the first to fourth fixing positions. The deformation E in which both sides of the plate outer 68 in the longitudinal direction warp upward is corrected by the fixing forces F1 and F4 at the first and fourth fixing positions on both sides in the longitudinal direction. The deformation E'that warps both sides in the longitudinal direction of the plate outer 68 downward is corrected by the fixing forces F2 and F3 at the second and third fixing positions in the central portion in the longitudinal direction. Further, the deformation of the plate outer 68 in which both sides in the lateral direction warp upward is corrected by the fixing forces F2 and F3 at the second and third fixing positions on both sides in the lateral direction in the central portion in the longitudinal direction. In this way, the deformation of the plate outer 68 is corrected as a whole, so that it is possible to prevent the generation of abnormal noise when the motor 76 is operated. Further, in the second and third fixed positions, the lower end surfaces of the two projecting pieces 77 on the lower surface of the plate outer 68 face the upper surfaces of both ends 52b and 52c of the shaft 52a of the worm 52 with a slight gap, respectively. Since the position is close to the position, it is possible to prevent a gap between the lower end surface of the projecting piece 77 and the upper surfaces of both end portions 52b and 52c of the shaft 52a of the worm 52. As a result, the shaft 52a of the worm 52 is prevented from floating from the bearings 38b and 38c, and the generation of abnormal noise from the worm 52 and the worm wheel 50 is prevented.

<< Embodiment of fixing three points >>
Other embodiments of the present invention will be described. FIG. 18 is a plan view of the frame 36'according to this embodiment. The same reference numerals are used for the parts corresponding to those in FIG. The frame 36'is the frame 36 of the above embodiment without the screw holes 117-4 corresponding to the fourth fixed position. FIG. 19 is a plan view of the plate outer 68'combined with the frame 36'. The same reference numerals are used for the parts corresponding to FIG. The plate outer 68'is the plate outer 68 of the above embodiment without the screw through holes 127-4 corresponding to the fourth fixed position. The configuration is the same as that of the above-described embodiment except that the screw hole 117-4 and the screw through hole 127-4 corresponding to the fourth fixing position are omitted. Due to such a change, the screwed positions of the frame 36'and the plate outer 68' by the screws 82 become the fixed positions of the first to third places. This simplifies the screwing work of the frame 36'and the plate outer 68'. Even if the fourth fixed position is omitted, the first to third fixed positions close to the position where the motor 76 is held are included in the fixed position, so that the inclination of the motor 76 due to the deformation of the plate outer 68'is effective. It can be suppressed to prevent the generation of abnormal noise when the motor is operated. At the fourth fixed position, even if the plate outer 68'is slightly deformed, it does not affect the meshing of the drive mechanism so much (that is, it is unlikely to cause abnormal noise), so such omission is possible.

In the above embodiment, the case where the present invention is applied to the electrically retractable rear view mirror for vehicles has been described, but the present invention is not limited to this. That is, the present invention is other than the electric retractable rear view camera for vehicles, other electrically retractable rear view devices for vehicles, and further rear view applications, which are mounted on the doors of vehicles projecting to the side of the vehicle instead of the door mirrors. It can also be applied to an electrically retractable visual device for vehicles. In the electric retractable rear view camera for vehicles, for example, the visor 14 in FIG. 2 is compactly configured to replace the mirror plate with a camera, and the optical axis of the camera faces the rear of the vehicle when the visor 14 is in the use position. It can be configured as mounted as such.

The following embodiments are described herein.
<< Embodiment 1 >>
A shaft erected on the vehicle body side, a visual recognition device rotating portion rotatably supported by the shaft in the direction around the visual recognition device rotating shaft arranged at the center of the shaft, and a visual recognition device rotating portion.
It has an electric drive mechanism for rotationally driving the visual recognition device rotating portion in a direction around the visual recognition device rotation axis.
The electric drive mechanism transmits a motor mounted on the visual recognition device rotating portion and a driving force of the motor to the shaft to rotate the visual recognition device rotating portion in a direction around the visual recognition device rotating shaft. Has a mechanism and
The visual recognition device rotating portion is fixed to the frame in a state where the frame has an internal space for accommodating the power transmission mechanism and the motor main body portion of the motor is held and arranged at a position facing the internal space of the frame. It has a support member that transmits the rotation of the motor rotation shaft of the motor to the power transmission mechanism.
The motor rotation axis is arranged substantially parallel to the visual recognition device rotation axis.
In the electric retractable visual apparatus for vehicles having such a configuration, the frame and the support member are fixed to each other with a fixed structure.
When viewed from the axial direction of the visual recognition device rotation axis, the line connecting the visual recognition device rotation axis and the motor rotation axis is the first line, and the line passing through the motor rotation axis and orthogonal to the first line is the second line. A line, a line that passes through the rotation axis of the visual recognition device and is orthogonal to the first line, is defined as a third line.
In the fixed structure, the visual device rotating shaft has a fixed position by screwing the frame and the supporting member, that is, a screw hole position, when viewed from the axial direction of the visual visual device rotating shaft, with respect to the second line. A second existing in a region opposite to the existing side and having at least a part in a region having a width from the second line to a position outside the motor main body and not overlapping the motor main body. A second fixed position and a third fixed position existing in a region opposite to each other across the first line within the region sandwiched between the first fixed position and the second line and the third line. Has a fixed position,
When viewed from the axial direction of the visual recognition device rotation axis, the direction from the second line toward the first fixed position is located in a region farther from the first fixed position with respect to the second line. It has such a fixed structure that does not have a fixed position by screwing the frame and the support member, and
The support member has a dome that surrounds the top of the shaft.
In the fixed structure, the motor rotating shaft exists with respect to the third line when viewed from the axial direction of the visual recognition device rotating shaft as a fixed position by screwing between the frame and the supporting member, that is, a screw hole position. A fourth fixed position that exists in a region opposite to the side of the dome and is present in a region that is at least partially present in a region having a width from the third line to a position outside the dome and that does not overlap the dome. Have more
With respect to the direction from the third line toward the fourth fixed position when viewed from the axial direction of the visual recognition device rotation axis, the region on the side farther than the fourth fixed position with respect to the third line. The fixing structure according to claim 1, which does not have a fixing position by screwing the frame and the support member.
<< Embodiment 2 >>
The fixing structure according to the first embodiment, wherein the screwing points between the frame and the support member exist only at the fixing positions of the first to fourth four places.

10 ... Electric retractable door mirror (electrically retractable visual recognition device for vehicles), 13 ... Vehicle body (right door), 15 ... Mirror rotating part (visualizing device rotating part), 18 ... Mirror rotating shaft (visualizing device rotating shaft), 24 ... Shaft, 36, 36'... frame, 38 ... internal space, 38b, 38c ... worm (intermediate gear) bearing, 50 ... worm wheel (intermediate gear), 52 ... worm (intermediate gear), 52a ... worm (intermediate gear) Axis, 52b, 52c ... Both ends of the worm (intermediate gear) shaft, 68, 68'... Plate outer (support member), 76 ... Motor, 76a ... Motor rotation shaft, 77 ... Projection piece (holding part), 81 ... Power transmission mechanism, 82 ... Screw, 87 ... Electric drive mechanism, 117 ... Screw hole (117-1 ... Corresponding to the first fixed position, 117-2 ... Corresponding to the second fixed position, 117-3 ... Third Corresponds to the fixed position of 117-4 ... Corresponds to the fourth fixed position) 127 ... Threading hole (127-1 ... Corresponds to the first fixed position, 127-2 ... Corresponds to the second fixed position, 127 -3 ... Corresponds to the third fixed position, 127-4 ... Corresponds to the fourth fixed position), L1 ... 1st line, L2 ... 2nd line, L3 ... 3rd line

Claims (3)

A shaft erected on the vehicle body side, a visual recognition device rotating portion rotatably supported by the shaft in the direction around the visual recognition device rotating shaft arranged at the center of the shaft, and a visual recognition device rotating portion.
It has an electric drive mechanism for rotationally driving the visual recognition device rotating portion in a direction around the visual recognition device rotation axis.
The electric drive mechanism transmits a motor mounted on the visual recognition device rotating portion and a driving force of the motor to the shaft to rotate the visual recognition device rotating portion in a direction around the visual recognition device rotating shaft. Has a mechanism and
The visual recognition device rotating portion is fixed to the frame in a state where the frame has an internal space for accommodating the power transmission mechanism and the motor main body portion of the motor is held and arranged at a position facing the internal space of the frame. It has a support member that transmits the rotation of the motor rotation shaft of the motor to the power transmission mechanism.
The motor rotation axis is arranged substantially parallel to the visual recognition device rotation axis.
In the electric retractable visual apparatus for vehicles having such a configuration, the frame and the support member are fixed to each other with a fixed structure.
When viewed from the axial direction of the visual recognition device rotation axis, the line connecting the visual recognition device rotation axis and the motor rotation axis is the first line, and the line passing through the motor rotation axis and orthogonal to the first line is the second line. A line, a line that passes through the rotation axis of the visual recognition device and is orthogonal to the first line, is defined as a third line.
In the fixed structure, the visual device rotating shaft has a fixed position by screwing between the frame and the supporting member, that is, a screw hole position, when viewed from the axial direction of the visual visual device rotating shaft, with respect to the second line. At least a part of the motor body exists in a region opposite to the existing side and has a width immediately before the motor main body is removed from the second line, that is, an outer edge position of the motor body. It exists in a region opposite to each other with the first line in between the first fixed position existing in the region not overlapping the portions and the region sandwiched between the second line and the third line. It has a second fixed position and a third fixed position,
When viewed from the axial direction of the visual recognition device rotation axis, the direction from the second line toward the first fixed position is located in a region farther from the first fixed position with respect to the second line. It is a fixed structure that does not have a fixed position by screwing the frame and the support member.
The electric drive mechanism has an intermediate gear arranged at a position sandwiched between the visual recognition device rotation shaft and the motor rotation shaft when viewed from the axial direction of the visual recognition device rotation shaft.
The shaft of the intermediate gear is arranged in a plane orthogonal to the rotation axis of the visual recognition device.
Both ends of the shaft of the intermediate gear are mounted and supported by bearings provided on the frame.
The support member has two holding portions that face the both ends of the shaft of the intermediate gear and hold the intermediate gear from floating from the bearing.
The second fixing position is arranged at one holding portion of the two holding portions, and the second fixing position is arranged at a position closer to the other holding portion.
The third fixing position is arranged at the other holding portion of the two holding portions, and the third fixing position is arranged at a position closer to the one holding portion.
The intermediate gear has a worm and a worm wheel coaxially fixed to the shaft of the worm.
The second fixed position and the third fixed position exist only once.
The second fixed position and the third fixed position have a width corresponding to the diameter of the worm wheel when viewed from the axial direction of the visual recognition device rotation shaft, and the center line of the shaft of the intermediate gear is defined as the center line. In the region centered on the width, the regions are arranged on opposite sides of the center line of the shaft of the intermediate gear and on opposite sides of the plate surface of the worm wheel.
Such a fixed structure. The fixing structure according to claim 1, wherein the screwing points between the frame and the support member exist only at the fixing positions of the first to third places. In the fixed structure, the motor rotating shaft exists with respect to the third line when viewed from the axial direction of the visual recognition device rotating shaft as a fixed position by screwing between the frame and the supporting member, that is, a screw hole position. Further has a fourth fixed position located in the area opposite to the side to
The fixing structure according to claim 1, wherein the screwing points between the frame and the support member exist only at the fixing positions of the first to fourth four places.

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