JP3197992U - ELECTRIC STORAGE VIEWER FOR VEHICLE AND FRAME OF ELECTRIC STORAGE UNIT OF THE DEVICE - Google Patents

Abstract

An electric retractable visual recognition device for a vehicle with improved positioning accuracy of a shaft center of a motor output shaft is provided. A rotating body of an electric retractable visual recognition device for a vehicle includes a frame and a motor holding member. The frame 36 is made of a resin-based material and holds the power transmission mechanism. The motor holding member holds the motor and is supported by the frame, and transmits the rotation of the motor output shaft to the power transmission mechanism. The motor holding member has a convex portion, and the convex portion has a hole for projecting the motor output shaft. The frame 36 has an enclosure wall 121, and has a recess 113a in which the projection of the motor holding member is fitted in the inner peripheral space 113 of the enclosure wall. The frame 36 has an outer peripheral space 123 on the outer periphery of the enclosure wall. [Selection] Figure 1

Description

  The present invention relates to a frame of an electric storage unit of an electric retractable visual recognition device for a vehicle such as an electric retractable mirror for a vehicle, an electric retractable camera for a vehicle, and the like, and rotates according to the rotation of a motor output shaft (motor shaft or motor shaft). The positioning accuracy of the axis of the rotation shaft member) is improved.

  Increasing the positioning accuracy of the shaft center of the motor output shaft in the electric retractable visual recognition device for vehicles is important for reducing the burden on gears and reducing operation noise. In the electric retractable mirror for a vehicle, as a conventional technique aimed at increasing the positioning accuracy of the axis of the motor output shaft, there are those described in Patent Documents 1 and 2 below. The techniques described in Patent Documents 1 and 2 will be described. Reference numerals in parentheses are those used in Patent Documents 1 and 2.

  The electric retractable unit of the electric retractable mirror for a vehicle described in Patent Document 1 includes a frame (11) that houses a power transmission mechanism (29, 30,...), And a motor (13) that holds the motor (13) in the frame (11). And a motor holding member (16) supported by the motor. The motor holding member (16) projects the tip of the motor output shaft (24, 17, 33) of the motor (13) downward to rotate the motor output shaft (24, 17, 33) to the power transmission mechanism (29, 30, ...) The motor holding member (16) is concentric with the motor output shaft (24, 17, 33) at the location where the motor output shaft (24, 17, 33) protrudes on the lower surface, and the axial view shape (the shape seen from the axial direction) The same applies hereinafter) having a circular protrusion (43). The frame (11) has a concave portion (42) that is open upward in a circular shape when viewed in the axial direction, into which the convex portion (43) is fitted. The shaft center of the motor output shaft (24, 17, 33) is positioned with respect to the frame (11) by fitting the convex portion (43) into the concave portion (42). On the outer peripheral surface of the convex portion (43), a plurality of protrusions (44) for press-fitting the convex portion (43) into the concave portion (42) extend in the axial direction at equal intervals in the circumferential direction. Is formed. By fitting the convex part (43) to the concave part (42) with the protrusion (44) without rattling, the positioning accuracy of the shaft center of the motor output shaft (24, 17, 33) with respect to the frame (11) is improved. ing.

  The electric retractable unit of the electric retractable mirror for a vehicle described in Patent Document 2 includes a frame (4) that houses a power transmission mechanism (14b, 13b,...) And a frame (4) that holds a motor (14). And a motor holding member (15) supported by the motor. The motor holding member (15) projects the tip of the motor output shaft (14a) of the motor (14) downward to transmit the rotation of the motor output shaft (14a) to the power transmission mechanism (14b, 13b,...). The motor holding member (15) has a convex portion (15d) that is concentric with the motor output shaft (14a) and has a circular shape in the axial direction at a position where the motor output shaft (14a) on the lower surface protrudes. The frame (4) has a concave portion (9g) opened upward in a circular shape in the axial direction, in which the convex portion (15d) is loosely accommodated. On the lower surface of the motor holding member (15), engagement protrusions (15i) are formed on both sides of the protrusion (15d). Engagement recesses (9j) are formed in the frame (4) at positions facing the engagement protrusions (15i) on both sides of the recesses (9g). When the convex portion (15d) is loosely accommodated in the concave portion (9g), the engaging protrusion (15i) engages with the engaging concave portion (9j), so that the motor output shaft (14a) with respect to the frame (4) is engaged. The positioning accuracy of the shaft center is increased.

JP 2012-111445 A JP 2004-299524 A

  According to the technology described in Patent Document 1, even if the protrusion (43) can be fitted into the recess (42) without rattling by the protrusion (44), the recess (42) itself has a sink caused by resin molding, etc. If it is not formed with high precision, the positioning accuracy of the shaft center of the motor output shaft (24, 17, 33) will deteriorate. According to the technique described in Patent Document 2, the positioning of the shaft center of the motor output shaft (14a) is performed by engaging the engaging protrusion (15i) at a position away from the convex portion (15d) and the concave portion (9g). This is performed by engaging the concave portion (9j), and the convex portion (15d) and the concave portion (9g) are not positioned directly, so the positioning accuracy is poor.

  The present invention provides an electric retractable visual recognition device for a vehicle with improved positioning accuracy of a shaft center of a motor output shaft and a frame of an electric retractable unit of the device.

  An electric retractable visual recognition device for a vehicle according to the present invention includes a shaft erected on a vehicle body side, a rotating body supported on the shaft so as to be rotatable in a direction around the shaft, and a motor mounted on the rotating body. And a power transmission mechanism that transmits the driving force of the motor to the shaft and rotates the rotating body in a direction around the axis of the shaft, wherein the rotating body includes the power A frame made of a resin-based material that holds the transmission mechanism, and a motor that holds the motor and is supported by the frame to transmit the rotation of the motor output shaft of the motor to the power transmission mechanism A holding member, the motor holding member has a convex portion, the convex portion has a hole for projecting the motor output shaft, and the frame has a shape in which the motor holding member is supported by the frame. And the frame has a surrounding wall, an inner circumferential space on the inner periphery of the surrounding wall, and an outer space on the outer periphery of the surrounding wall. The circumferential space has the recess. According to this, the frame has an enclosing wall, and the recessed portion of the frame in which the convex portion of the motor holding member fits is formed in the inner peripheral space of the enclosing wall, and the outer peripheral space is formed on the outer periphery of the enclosing wall. Since it is configured, the outer peripheral side space functions as a thinned portion, and the sink of the peripheral wall surface of the concave portion due to resin molding of the frame is suppressed as compared with the structures described in Patent Documents 1 and 2. . Therefore, the recess can be configured with high accuracy, and the positioning accuracy of the axis of the motor output shaft with respect to the frame can be increased.

  In the vehicular electric retractable visual recognition device according to the present invention, the surrounding wall may have a substantially uniform thickness in the circumferential direction. When the thickness of the surrounding wall is greatly different at the circumferential position, the size of sink marks is greatly different at the circumferential position, and the molding accuracy of the concave portion is lowered. On the other hand, the concave wall can be configured with high accuracy by making the surrounding wall substantially uniform in the circumferential direction, and the positioning accuracy of the axis of the motor output shaft with respect to the frame can be further increased.

  In the vehicular electric retractable visual recognition device according to the present invention, the outer space can be continuously formed along the circumferential direction of the enclosure wall. According to this, if the outer peripheral space is interrupted at a midway position in the circumferential direction of the enclosure wall, there is a risk of causing a large sink on the peripheral wall surface of the recess at that position. Therefore, it is not necessary to cause such sinking, and the positioning accuracy of the axis of the motor output shaft with respect to the frame can be further increased.

  In the vehicular electric retractable visual recognition device according to the present invention, the inner peripheral space of the enclosure wall is connected to the concave portion into which the convex portion is fitted and extends in the depth direction of the concave portion, The extended portion of the side space contains a gear connected to the motor output shaft, which is a component of the power transmission mechanism, and the enclosure wall is a depth of the inner space. It may be configured to reach a depth to accommodate the gear in a direction. According to this, the sinking of the peripheral wall surface can be suppressed also in the depth direction of the recess, and the space for housing the gear can be configured with high accuracy.

  In the vehicular electric retractable visual recognition device according to the present invention, the enclosure wall has an opening in a partial region in the circumferential direction, and the opening arranges an inner peripheral space in the enclosure wall and the power transmission mechanism. A communication path that communicates with the space outside the surrounding wall can be configured. According to this, the power transmission component of the power transmission mechanism arranged in the space outside the enclosure wall is caused to enter the space on the inner peripheral side of the enclosure wall from the communication path, and the driving force of the motor is transmitted to the power transmission mechanism. be able to.

  In the vehicular electric retractable visual recognition device according to the present invention, both end portions in the circumferential direction of the surrounding wall are folded back in the outer circumferential direction at the position of the communication path and are located on the outer circumferential side of the outer circumferential space in the frame. It can be connected to. According to this, the both ends of the surrounding direction of the surrounding wall are supported by the part located in the outer peripheral side of the outer peripheral side space of a flame | frame, and the rigidity of an surrounding wall can be improved.

  In the electric storage-type visual recognition device for a vehicle according to the present invention, the motor holding member is made of a resin-based material, and the convex portion is formed in a cylindrical shape having a recess on the inner peripheral side. be able to. According to this, the concave portion functions as a thinned portion, and sink marks on the peripheral wall surface of the convex portion due to resin molding of the motor holding member are suppressed. Therefore, the convex portion can be configured with high accuracy, and the positioning accuracy of the axis of the motor output shaft with respect to the frame can be further increased.

  In the vehicular electric retractable visual recognition device according to the present invention, the surrounding wall has an annular (including semicircular) portion, and the concave portion has a circular (including semicircular) portion, and the convex portion is A circular (including semicircular) portion that fits into the circular portion of the concave portion may be provided, and the hole may be configured at a center position of the circular portion of the convex portion. According to this, the circular part of a recessed part can be comprised with high precision by the outer peripheral side space comprised in the outer periphery of an enclosure wall. Therefore, the circular portion of the convex portion that fits into the circular portion of the concave portion is positioned with high accuracy on the frame, and the motor output shaft that protrudes from the hole at the center position of the circular portion of the convex portion is accurately positioned with respect to the frame. Thus, the positioning accuracy of the axis of the motor output shaft with respect to the frame can be further increased.

  In the vehicular electric retractable visual recognition device of the present invention, the annular portion of the enclosure wall may be configured over an angular range of 180 degrees or more in the circumferential direction. According to this, it becomes easy to fit the convex portion and the concave portion and align the centers of the convex portion and the concave portion, and the positioning accuracy of the axis of the motor output shaft with respect to the frame can be further increased.

  In the vehicular electric retractable visual recognition device of the present invention, the outer peripheral space may have an annular (including semicircular) portion coaxial with the surrounding wall. According to this, a portion having a uniform thickness in the circumferential direction can be formed on the surrounding wall, so that the circular portion of the recess is configured with higher accuracy, and the positioning accuracy of the axis of the motor output shaft with respect to the frame is increased. Can be increased.

  In the electric retractable visual recognition apparatus for a vehicle according to the present invention, the outer diameter of the annular portion of the enclosure wall may be smaller than the outer diameter of the motor main body of the motor. According to this, the annular portion of the enclosure wall is configured to be thin, the sink of the annular portion is further suppressed, the circular portion of the recess is configured with higher accuracy, and the shaft of the motor output shaft with respect to the frame The positioning accuracy of the heart can be further increased.

  The frame of the electric storage unit of the electric retractable visual recognition device for a vehicle according to the present invention is a frame that holds the power transmission mechanism of the electric storage unit of the electric retractable visual recognition device for a vehicle, and the frame is made of a resin-based material. The frame has an enclosure wall, an inner circumferential space on the inner periphery of the enclosure wall, and an outer space on the outer periphery of the enclosure wall, and the inner circumferential space is the power transmission mechanism. It is such a frame which has a recessed part with which the convex part which projects the motor output shaft of the motor which drives the motor is fitted.

It is a top view of the flame | frame 36 shown in FIG. 1 is an exploded perspective view of an electric retractable door mirror for a vehicle right side according to an embodiment of the present invention. FIG. 3 is an exploded perspective view of the electric storage unit 16 shown in FIG. 2. It is the perspective view which looked at the flame | frame 36 shown in FIG. 3 from the bottom face side. It is a perspective view which shows the state in the middle 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 a cutting | disconnection end elevation of the AA arrow position of FIG. It is a top view which shows the state which assembled the door mirror 10 of FIG. 2 (it shows in the state which removed the housing cover), and shows the attitude | position which has the mirror rotation part 15 in a deployment position. FIG. 2 is an enlarged view of a peripheral portion of an enclosure wall 121 of a frame 36 shown in FIG. 1, and is a perspective view seen from obliquely above a position indicated by an arrow B in FIG. FIG. 4 is a plan view of the plate outer 68 shown in FIG. 3. FIG. 4 is a bottom view of the plate outer 68 shown in FIG. 3. It is a front view of the plate outer 68 shown in FIG. FIG. 4 is a perspective side view seen from one side surface of a plate outer 68 shown in FIG. 3. FIG. 4 is a side view seen from the other side of the plate outer 68 shown in FIG. 3. It is a top view which shows the state which assembled the components of the electric storage unit 16 shown in FIG. 3, and shows the state which removed the plate outer (motor holding member) 68 and the seal cap (cover) 90 (the motor 76 is shown in figure). FIG. 14 is a cut end view of the electric storage unit 16 shown in FIG. 2 taken along the line DD in FIG. 14 and shows a state in which the seal cap 90 (FIG. 3) is removed.

  An embodiment of the invention will be described. FIG. 2 is an exploded perspective view of a right side electric retractable door mirror to which the present invention is applied. FIG. 2 shows a state in which the mirror rotating unit 15 is viewed from the back side (vehicle front side) in the deployed position. 2, the mirror surface adjustment actuator and the mirror plate disposed in the front opening 14a of the visor 14 and the housing cover (reference numeral 17 in FIG. 6) attached to the back side of the visor 14 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 unit 15 has a visor 14. The mirror base 12 protrudes 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 portion and a rotating body 16b at the upper portion, and the rotating body 16b can rotate around the rotation shaft 18 with respect to the fixed body 16a. The rotating body 16b of the electric storage unit 16 is fixed to the back side of the visor 14 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 16 a of the electric storage unit 16 in which the rotating body 16 b is fixed to the visor 14 is fixed to the mirror base 12 by screwing three screws 22 into the fixed body 16 a of the electric storage unit 16 from the lower surface of the mirror base 12. . As a result, the mirror rotating unit 15 including the visor 14 is attached to and supported by the mirror base 12 via the electric storage unit 16 so as to be rotatable around the rotation shaft 18. A housing cover (symbol 17 in FIG. 6) (not shown) is attached to the back surface of the visor 14. As a result, the opening 14 b on the back surface of the visor 14 is closed by the housing cover 17, and the electric storage unit 16 is accommodated in a space surrounded by the visor 14 and the housing cover 17. The mirror rotating unit 15 is rotated by electric drive by the electric storage unit 16 and can be moved alternatively between a storage position and a deployment position. Further, the mirror rotating unit 15 is rotated by an external force, and can move in the opposite direction from the retracted position to the forward tilt position through the deployed position.

  The overall configuration of the electric storage unit 16 will be described mainly with reference to FIG. All the components shown in FIG. 3 are detachably assembled to form the electric storage unit 16. The electric storage unit 16 has a shaft 24 that constitutes a fixed body 16a. The shaft 24 is constituted by an integrally molded product of reinforced resin such as PA + GF resin (glass fiber reinforced polyamide resin). The shaft 24 has a large-diameter and disk-shaped shaft base portion 24a at the lower portion and a small-diameter and cylindrical shaft shaft portion 24b at the upper portion. The shaft 24 is vertically installed on 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 portion 24a, a mountain-valley repeated shape 26 is formed at its outermost peripheral position in which three pairs of peaks 26b and valleys 26a are alternately arranged in the direction around the axis of the shaft 24, and each set is repeatedly arranged 120 degrees. The circumferential length (angle) of one valley 26a is longer than the circumferential length (angle) of one peak 26b. Further, two height maintaining projections 28 are connected to the outer peripheral surface of the shaft shaft portion 24b at intervals of 180 degrees in the direction around the shaft 24 at the innermost peripheral position on the upper surface of the shaft base portion 24a. Yes. When the mirror rotating portion 15 is moved from the deployed position to the forward tilt position direction by an external force, the height maintaining protrusion 28 abuts and slides on a height maintaining protrusion 41 and a top surface of the frame 36, which will be described later. By maintaining the height of the frame 36 relative to the mirror, the mirror rotating portion 15 can be electrically returned from the forward tilt position to the deployed position. Further, on the upper surface of the shaft base portion 24 a, a groove-shaped bearing surface 30 having a constant width is provided at the radial position between the repetitive shape 26 at the outermost peripheral position and the height maintaining protrusion 28 at the innermost peripheral position. It is configured to be annular and flat in the circumferential direction. A resin washer 34 is placed and accommodated in the groove on the bearing surface 30. The hollow portion 31 of the shaft shaft portion 24b is opened through the shaft base portion 24a. A wire harness (external power supply wiring) (not shown) that supplies power to the electric storage unit 16 and the mirror surface adjustment actuator is passed through the hollow portion 31. On the outer peripheral surface of the shaft shaft portion 24b, there are formed anti-rotation shapes 32 in which five anti-rotation concave portions 32a and anti-rotation convex portions 32b are alternately arranged in the circumferential direction and repeatedly arranged at equal intervals. Each of the rotation stop concave portions 32 a and the rotation stop convex portions 32 b is configured to extend in the axial direction of the shaft 24. The upper end of the rotation stop recess 32a opens upward to allow the mating rotation stop protrusion (rotation stop protrusion 62b formed on the inner peripheral surface of the clutch plate 58 described later) to be fitted into the rotation stop recess 32a. 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 casing of the rotating body 16b together with a seal cap 90 described later) is rotatably supported on the shaft 24. The frame 36 is composed of an integrally molded product of 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 38 a of the internal space 38. The hollow portion 43 of the cylinder 40 passes through the bottom surface 38a. Now, with reference to FIG. 4 once leaving FIG. 3, the configuration of the lower surface of the frame 36 will be described. On the lower surface of the frame 36, a thick cylinder 39 coaxial with the cylinder 40 and having a diameter larger than that of the cylinder 40 and projecting downward (upward in FIG. 4) is provided. On the inner peripheral surface of the cylinder 39, two height maintaining protrusions 41 (FIG. 3) of the shaft base portion 24 a and two height maintaining protrusions 41 in which the top surfaces come into contact with each other slide in the direction around the axis of the cylinder 39. Are 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 at the same radial position as the inner peripheral surface 40a of the cylinder 40, and both the inner peripheral surfaces constitute a continuous surface. The height maintaining protrusions 28 and 41 are at the same radial position. The lower end surface of the cylinder 39 constitutes a bearing surface 45 that faces the bearing surface 30 of the shaft 24. An outer cylinder 49 is arranged coaxially with the cylinder 39 through a gap 47 outside the cylinder 39. In the gap 47, a mountain-valley repeated shape 27 that fits into a mountain-valley repeated shape 26 (FIG. 3) on the upper surface of the shaft base 24a is formed. The mountain valley repeating shape 27 is configured by alternately arranging three sets of peaks 27b and valleys 27a in the direction around the axis of the cylinder 39, and repeating each group by 120 degrees. The circumferential length (angle) of one valley 27a is longer than the circumferential length (angle) of one peak 27b. The crest 27 b is 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 is configured to protrude downward (upward in FIG. 4) in a partial region of the outer cylinder 49 in the circumferential direction. The stopper 51 is inserted into a stopper groove 57 (FIG. 2) formed in the mirror base 12 so as to be movable in the circumferential direction, and sets the maximum rotation range (from the retracted position to the forward tilt 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 supported by the shaft 24 so as to be rotatable around the axis of the shaft 24. The crest 26 b of the repetitive crest and valley shape 26 of the shaft 24 enters the gap 47 at the bottom of the frame 36. In this state, the mountain-valley repeated shape 26 and the mountain-valley repeated shape 27 are locked 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 brought into contact with each other (or stored). The direction in which the stopper 51 is locked at one end of the stopper groove 57 is slidably fitted in an angular range in both rotation directions, and the mirror rotating portion 15 (FIG. 2) is moved between the retracted position and the deployed position. Allow to rotate between. Further, when an external force of a predetermined value or more forward is applied to the mirror rotating portion 15 at the unfolded position, the mountain 26b and the mountain 27b are inclined with respect to each other against a biasing force of a coil spring 64 described later. The surface is slid and climbed, and it rides on the top surface of the opponent's mountain to release the fitting of the mountain valley repeat shape 26 and the mountain valley repeat shape 27, and the mirror rotating portion 15 is allowed to rotate to the forward tilt 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 formed. In this embodiment, there are three upper, middle and lower screw holes 46, but screws (not shown) are respectively inserted into two upper and lower screw holes 46, and two upper and lower bosses 44 are inserted. The frame 36 is fixed to the back surface of the visor 14 by screwing.

  Returning to FIG. 3, a resin washer 48 is loosely attached to the outer periphery 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 38 a 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 they are assembled so as not to rotate relative to each other. The assembled worm wheel 50 and worm 52 are accommodated in the internal space 38 of the frame 36 and arranged at predetermined positions, 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. 1). , 38b and 38c) (see FIG. 14). As a result, the worm wheel 50 and the worm 52 rotate together in the internal space 38. 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 formed of an integrally molded product of reinforced resin such as PA + GF resin. A hollow portion 55 into which the cylinder 40 and the shaft shaft portion 24b of the frame 36 are rotatably inserted is formed at the center portion of the shaft extrapolation gear 54. 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 are formed by helical teeth to constitute a worm wheel. The gear teeth 54b mesh with the worm 52 to constitute a worm gear. On the upper surface of the shaft extrapolation gear 54, there are five clutch troughs 56a and clutch peaks 56b alternately arranged in the direction around the shaft of the shaft extrapolation gear 54, and the shaft extrapolation gear side clutch surface 56 is repeatedly arranged at equal intervals. It is configured. The circumferential length (angle) of one clutch valley 56a is set equal to the circumferential length (angle) of one clutch peak 56b.

  On the shaft extrapolation gear 54, a clutch plate 58 is inserted into the shaft shaft portion 24b and placed and supported concentrically. The clutch plate 58 is formed of an integrally molded product of reinforced resin such as PA + GF resin. A hollow portion 59 into which the shaft shaft portion 24b is inserted so as not to rotate but to be movable in the axial direction is formed at the center portion of the clutch plate 58. On the lower surface of the clutch plate 58, a shaft-side clutch surface 60 is configured in which five sets of clutch valleys 60 a and clutch peaks 60 b are alternately arranged in the direction around the axis of the clutch plate 58 and are repeatedly arranged at equal intervals. The shaft extrapolation gear side clutch surface 56 and the shaft side clutch surface 60 constitute 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 peak 60b are set equal. The shaft extrapolation gear side clutch surface 56 and the shaft side clutch surface 60 have the same inner diameter and outer diameter. Therefore, the clutch valley 56a and the clutch peak 56b of the shaft extrapolation gear side clutch surface 56 are fitted to the clutch peak 60b and the clutch valley 60a of the shaft side clutch surface 60 without rattling. The step at the boundary position between the clutch valley 56a and the clutch peak 56b and the step at the boundary position between the clutch valley 60a and the clutch peak 60b are respectively configured by inclined surfaces having the same inclination angle. Thereby, the fitting of the shaft extrapolation gear side clutch surface 56 and the shaft side clutch surface 60 can be disengaged by the rotational force acting between these clutch surfaces 56, 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 extends in the axial direction. The anti-rotation concave portion 62a and the anti-rotation convex portion 62b face the anti-rotation convex portion 32b and the anti-rotation concave portion 32a formed on the outer peripheral surface of the shaft shaft portion 24b through a slight gap. As a result, the anti-rotation concave portion 62a and the anti-rotation convex portion 62b are fitted to the anti-rotation convex portion 32b and the anti-rotation concave portion 32a so as to be non-rotatable around the axis and slidable in the axial direction. As a result, the clutch plate 58 is attached to the shaft shaft portion 24b so that it cannot rotate in the direction around the shaft shaft portion 24b but can move in the axial direction.

  On the clutch plate 58, a coil spring 64 is inserted into the shaft shaft portion 24b and placed and supported concentrically. On the coil spring 64, a metal plate 66 is inserted into the shaft shaft portion 24b while pressing and compressing the coil spring 64. The metal plate 66 is mounted on the upper portion of the shaft shaft portion 24b by inserting and rotating the projection 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. The Thereby, the coil spring 64 is attached to 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 peak-and-valley repeat shape 26 on the upper surface of the shaft base 24 a and the peak-and-valley repeat shape 27 (FIG. 4) on the lower surface of the frame 36, and 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 unfolded position, the extension force applied from the coil spring 64 to the frame 36 is received by the bearing surface 30 from the bearing surface 45 via the resin washer 34, and 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 interposed therebetween (that is, the mirror rotating portion is brought into contact with the bearing surfaces 45 and 30 with the resin washer 34 interposed therebetween). Since the rotation of 15 is supported by the bearing), the opposing surfaces of the repetitive shapes 26 and 27 are separated from each other and do not contact and slide (see FIG. 6).

  After all the components shown on the right side of FIG. 3 are assembled, a plate outer (motor holding member) 68 is placed on the inner peripheral step 36b of the opening 36a at the upper end of the frame 36, and the opening 36a is closed. . The plate outer 68 is constituted by an integrally molded product of resin such as POM (polyacetal). The plate outer 68 has a cylindrical portion 72 that houses and holds the motor 76 on the upper surface, and an upper portion of the shaft shaft portion 24 b that protrudes upward from the opening 36 a of the frame 36, a coil spring 64, and a dome 74 that surrounds the metal plate 66. As a result, the motor 76 is arranged at the side position of the shaft shaft portion 24b with the rotation shaft of the motor 76 parallel to the shaft 24 (corresponding to the rotation shaft 18). A round hole 74a is formed at the center 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 cylindrical portion 72 from above and attached to the plate outer 68. A motor shaft (motor output shaft) 78 of the motor 76 passes through a hole 73a formed in the central portion of the bottom 73 (FIGS. 6 and 9) in the cylindrical portion 72 and extends vertically downward below the plate outer 68. Protruding. A worm 80 is attached to the motor shaft 78. The plate outer 68 is placed on the stepped portion 36b on the inner peripheral side of the opening 36a of the frame 36 with the motor 76 and the worm 80 held in this manner. At this time, the worm 80 is engaged with the worm wheel 50 to form a worm gear. The worm 80, the worm wheel 50, the worm 52, the shaft extrapolation gear 54, and the clutch plate 58 constitute a power transmission mechanism 81 that transmits the driving force of the motor 76 to the shaft shaft portion 24b, and the inner space 38 of the frame 36. Is contained and held. Further, the lower end surfaces of the two projecting pieces 77 (FIGS. 10, 11, and 13) configured to project downward from the lower surface of the plate outer 68 are the upper surfaces of both end portions 52b and 52c 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 through a slight gap. After the plate outer 68 is placed on the step 36 b on the inner peripheral side of the opening 36 a 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 the space between the cylinder portion 72 and the dome 74 on the upper surface of the plate outer 68 (in other words, the space between the motor 76 and the shaft shaft portion 24 b) 75). (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 a metal shaft extrapolation gear in order to ensure the necessary strength as a shaft extrapolation gear. Large diameter. Along with this, the space 75 between the motor 76 and the shaft shaft portion 24b is expanded, so that the circuit board 84 is mounted with the connector receptacle (socket) 88 and the like, so that the entire thickness including the mounted components is increased. Even if the thickness of the circuit board 84 is increased, the circuit board 84 can be easily disposed in the space 75. The circuit board 84 has a motor driving circuit for supplying driving power to the motor 76, and a motor connection terminal 86 (male terminal) for connecting the motor driving circuit and a terminal 85 (motor terminal, female terminal, FIG. 7) of the motor 76. And a connector receiver 88 (socket, connector receiving portion) for connecting the wire harness and the motor drive circuit by inserting the connector 89 (FIG. 7) at the tip of the wire harness (not shown). In the connector receiver 88, 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 disposed. The lower end 84 a of the circuit board 84 is inserted into and supported by a groove 75 a formed at the bottom of the space 75 between the cylindrical portion 72 and the dome 74 of the plate outer 68, and the tip of the motor connection terminal 86 is inserted into the motor terminal 85. Supported. As a result, the circuit board 84 is placed 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, a seal cap 90 is put on the plate outer 68. The seal cap 90 is formed of an integrally molded product of resin such as PP (polypropylene). On the upper surface of the seal cap 90, a round hole 92 communicating with the upper opening 31a of the hollow portion 31 of the shaft shaft portion 24b is formed. 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, a claw locking frame 98 is formed 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 down, the claws 100 that are configured to project at four locations around the upper outer peripheral surface of the frame 36 engage with the claw locking frame 98 of the seal cap 90. Thereby, the frame 36 and the seal cap 90 are connected, and the electric storage unit 16 is assembled as a unit. 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. In addition to the wiring for the electric storage unit 16, the wire harness includes a mirror surface adjustment actuator wiring, a turn lamp wiring, and the like according to 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 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. Connectors are respectively attached to the ends of the wires of the wire harness on the mirror rotating portion 15 side. Among 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.

  FIG. 5 shows the assembly of the components shown on the right side of FIG. 3, and the plate outer 68 holding the motor 76 and the worm 80 is fitted to the inner peripheral side of the opening 36 a at the upper end of the frame 36. A state in which the circuit board 84 and the seal cap 90 are assembled to a product in the process of being assembled to the state 36 is shown. In FIG. 5, the holding state of the motor main body 69 with respect to the cylindrical portion 72 of the plate outer 68 appears well. That is, the motor 76 is held by the motor shaft 78 (FIG. 3) facing downward, and the entire motor main body 69 is embedded and held in the internal space 129 of the cylindrical portion 72 of the plate outer 68, and is orthogonal to the motor axis relative to the cylindrical portion 72. The movement in the direction of rotation and the rotation around the motor shaft are locked. Further, the motor 76 is locked by the claw engaging piece 139 in the motor shaft direction with respect to the cylindrical portion 72. Details of the motor holding configuration will be described later. The circuit board 84 is inserted into the space 75 between the cylindrical portion 72 on the upper surface of the plate outer 68 and the dome 74, and the lower end 84 a of the circuit board 84 is detachably inserted into the groove 75 a of the plate outer 68, so that the motor connection terminal 86. Is inserted into the motor terminal 85 (FIG. 7) in a detachable manner. 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 is assembled to the product in a standing position in the space 75. After the circuit board 84 is assembled, the seal cap 90 is put on from above, and the claw 100 of the frame 36 is detachably engaged with the claw locking frame 98 of the seal cap 90, so that the seal cap 90 is assembled to the product. . After the seal cap 90 is assembled to the product, the wire harness is passed through the hollow portion 31 of the shaft shaft portion 24b. In a state where the seal cap 90 is assembled to the product, the connector insertion port 88a of the connector holder 88 of the circuit board 84 and the connector insertion port 94 of the seal cap 90 communicate with each other, and the connector for the wiring for the electric storage unit 16 of the wire harness. 89 is inserted into the connector insertion port 88 a from the connector insertion port 94 and can be connected to the connector receiver 88.

  FIG. 6 shows the door mirror 10 having the above configuration cut at positions passing through the central axes of the shaft 24 and the motor 76. This corresponds to the cut end surface structure at the position of the arrow AA in FIG. 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 external gear side clutch surface 56 and the shaft side clutch surface 60 are engaged with each other. Show. At this time, the mountain valley repeated shape 26 and the mountain valley repeated 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 the storage switch is given by operating the mirror switch from the unfolded position in FIG. 6, the motor 76 is activated. 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, since the shaft extrapolation gear side clutch surface 56 and the shaft side clutch surface 60 are engaged with each other and the shaft extrapolation gear 54 cannot rotate with respect to the shaft shaft portion 24b, the frame 36 is instead rotated around the axis 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 while sandwiching the resin washer 34, and the bottom surface 38a of the inner space 38 of the frame 36 and the bearing surface 106 of the lower surface of the shaft external gear 54 sandwich the resin washer 48. And the mirror rotating portion 15 rotates in the retracted 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. Stopped. Thus, the mirror rotating unit 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 activated in the reverse direction, and the mirror rotating unit 15 rotates in the deployment direction. The rotation of the mirror rotating portion 15 is stopped at the unfolded position by the engagement of the inclined surface at the boundary between the peak 26b and the valley 26a of the peak-and-valley repeated shape 26 and the inclined surface at the boundary between the peak 27b and the valley 27a of the peak-and-valley repeated shape 27. Then, the stop is detected and the driving of the motor 76 is stopped. As a result, the mirror rotating unit 15 is held at the unfolded position.

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

  A configuration in the internal space 38 of the frame 36 will be described with reference to FIGS. 1 and 8. FIG. 8 is a view of the frame 36 as viewed in the direction of arrow B from obliquely above the position of arrow B in FIG. In order to facilitate understanding, FIG. 1 shows a region at a relatively high position (a shallow position in the opening 36a) in the region on the inner peripheral side of the opening 36a of the frame 36 in gray. In the internal space 38 of the frame 36, in addition to the configuration described above, the worm wheel housing space 111, the surrounding wall 121, the inner peripheral side space 113 of the surrounding wall 121, the outer peripheral side space 123 of the surrounding wall 121, the internal space A communication passage 115 for communicating the inner space 38 and the inner peripheral space 113, four screw holes 117, and the like are formed. The surrounding wall 121 has an annular portion (cylindrical portion) 121a having an annular shape in an axial direction and having a circumferential angle range (circumferential length) of a semicircle (180 degrees) or more. The outer diameter of the annular portion 121 a is configured to be smaller than the outer diameter of the motor main body 69. In addition, the surrounding wall 121 has an opening 126 in a partial region (region facing the worm wheel housing space 111) in the circumferential direction of the annular portion 121a. The surrounding wall 121 is connected to both ends of the opening 126 and has flat portions 121b and 121c facing each other in parallel, and a communication path 115 is formed between the flat portions 121b and 121c. Furthermore, the surrounding wall 121 is connected to both end portions of the planar portions 121b and 121c, and has folded portions 121d and 121e that are folded outward. 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 space 123 of the frame 36. As a result, the shape of the surrounding wall 121 in the axial direction is substantially “Ω” as a whole with a certain thickness. The worm wheel accommodating space 111 accommodates the worm wheel 50 fixedly mounted coaxially on the shaft 52 a 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 space 113 is a cylindrical space having a larger diameter than the worm 80 and has a closed bottom, and accommodates the worm 80 coaxially. The communication path 115 allows the worm wheel housing space 111 and the inner peripheral space 113 to communicate with each other, and causes the outer peripheral surface of the worm wheel 50 to enter the inner peripheral side space 113 through the communication path 115 so that the worm wheel 50 and the worm 80 are connected. Engage with each other. The four screw holes 117 are screw holes for screwing four screws 82 (FIG. 3) for fixing the plate outer 68 onto the frame 36. A bearing recess 93 having a smaller diameter than the general diameter of the inner peripheral space 113 is formed at the bottom of the inner peripheral space 113. The bearing recess 93 is filled with grease, and the tip 80a (FIG. 15) of the worm 80 is accommodated and supported by the bearing. The upper part of the inner peripheral space 113 forms a recess 113a having a circular shape in the axial direction. In the recess 113a, the protrusion 119 (FIGS. 10, 11, etc.) on the lower surface of the plate outer 68 is housed and fitted without any gaps (or almost without any gaps) except for a portion facing the communication path 115 (see FIG. 10). 15, FIG. 6). The convex portion 119 has a circular shape in the axial direction as the concave portion 113a, and a hole 73a (FIGS. 15 and 6) for passing the motor shaft 78 is formed at the center thereof. The convex portion 119 has a concave portion 119a (FIG. 10) having a circular shape in the axial direction on the inner peripheral side, and accordingly, the convex portion 119 is formed in a cylindrical shape having a constant thickness. The bottom of the recess 119a is closed, and a hole 73a is formed at the center position. The recess 119a functions as a thinned portion of the convex portion 119, suppresses sink marks associated with resin molding of the plate outer 68, and increases 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 the inner peripheral surface of the concave portion 113a being surrounded by a region of a full circumference (180 degrees) or more. As a result, the motor shaft 78 protruding from the central hole 73 a of the convex portion 119 is positioned on the central axis of the inner peripheral space 113. The opening end surface 113b of the recess 113a is formed as an inwardly inclined surface, and makes it easy for the protrusion 119 to enter the recess 113a. The outer peripheral space 123 is a space in which the shape viewed in the axial direction along the outer periphery of the surrounding wall 121 is continuous in an annular shape (generally “C” shape) and is concentric with the surrounding wall 121 and has a closed bottom. It is configured. The outer peripheral portion of the outer peripheral space 123 constitutes the outer wall of the frame 36. The depth of the outer peripheral side space 123 reaches a position deeper than the central portion in the vertical direction of the inner peripheral side space 113. The outer peripheral space 123 functions as a thinned portion of the outer wall of the frame 36 at the outer peripheral position of the inner peripheral space 113, suppresses sink marks associated with resin molding of the frame 36, and molding accuracy of the inner peripheral space 113 Is increasing. Since the convex portion 119 of the plate outer 68 has a molding accuracy enhanced by the recess 119a, and the concave portion 113a of the frame 36 has a molding accuracy enhanced by the outer peripheral recess 123, a motor for the inner peripheral cavity 113 is provided. The positioning accuracy of the shaft 78 in the surface 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, the operation sound when the worm 80 and the worm wheel 50 are meshed and rotated is maintained at a normal level, and the worm 80 and the worm wheel 50 are maintained. The burden on the wheel 50 can be reduced.

  The structure of the plate outer 68 constituting the motor holding member will be described with reference to FIGS. The plate outer 68 has a structure in which a cylindrical portion 72 and a dome 74 are arranged side by side with a space 75 in a perpendicular manner to the upper surface of the flat plate-like portion 125. The plate-like portion 125 is placed and supported on the frame 36 with its lower peripheral edge 125 a (FIG. 10, etc.) abutting against the inner peripheral step 36 b (FIG. 1) of the upper opening 36 a of the frame 36. The Two projecting pieces 77 project downward from the lower surface of the plate-shaped portion 125. The lower end surface of the projecting piece 77 faces the upper surface of both end portions 52b and 52c of the shaft 52a of the worm 52 (FIG. 14) through a slight gap, so that the worm 52 and the worm wheel 50 move upward. regulate. Four screw holes 127 communicating with the four screw holes 117 (FIG. 1) of the frame 36 are formed in the peripheral portion in the plane of the plate-like portion 125. The plate outer 68 is placed and supported on the stepped 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. 68 is fixed to the frame 36.

  The structure of the cylinder part 72 is demonstrated. 9-13, the cylinder part 72 has the internal space 129 which accommodates and hold | maintains the motor main-body part 69 (FIG. 15 etc.). 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 motor main body 69 is entirely accommodated in the internal space 129 of the cylindrical portion 72. The cylindrical portion 72 has a pair of opposed arcuate surface portions 72a and 72b and a pair of opposed flat surface portions 72c and 72d in accordance with the shape of the motor main body 69 (FIG. 9 and the like). The internal space 129 opens upward, and the motor 76 can enter the internal space 129 from the open end 129a. A plurality of ridges 131 (FIGS. 9 and 12) for contacting the outer peripheral surface of the motor 76 and holding the motor 76 in the inner space 129 without rattling are provided on the peripheral wall surface of the internal space 129 in the vertical direction. It is configured to extend. That is, the protrusion 131 has a bottom portion of the internal space 129 at a total of six locations, one at each of the central portions in the width direction of the arcuate surface portions 72a and 72b and two at each of the two end portions in the width direction of the plane portions 72c and 72d. 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. 12) of the ridge 131 prevents the front end surface 69a of the motor main body 69 from being hooked on the upper end surface 131a when the motor main body 69 enters the internal space 129 and is not locked. It is comprised in the inclined surface which inclines in the approach direction direction of the part 69. FIG. The flat part 72c of the cylindrical part 72 is formed with a notch 133 opened upward (FIG. 12 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). At the boundary portion between the flat surface portion 72d and the circular arc surface portion 72a of the cylindrical portion 72 and the boundary portion between the flat surface portion 72d and the circular arc surface portion 72b, notches 135 and 137 are formed in the vertical direction along the boundary line of the boundary portion (the cylindrical portion 72 (In the axial direction of the internal space 129) and opened (FIGS. 12, 13, etc.). The upper ends of the notches 135 and 137 open to the upper end of the cylindrical portion 72 (open end 129a of the internal space 129). The lower ends of the notches 135 and 137 are located approximately in the middle of the cylindrical portion 72 in the vertical direction. About half of the upper side of the cylindrical portion 72 is separated in the circumferential direction by the notches 135 and 137, and the claw engaging piece 139 is configured by the separated portions. That is, the claw engaging piece 139 is configured by a part in the circumferential direction of the upper half portion of the cylindrical portion 72. The lower end of the claw engaging piece 139 is connected to the lower half of the cylindrical portion 72 as a fixed end 139a, and the upper end of the claw engaging piece 139 constitutes a free end 139b. Thereby, the claw engagement piece 139 can be bent by elastic deformation in the inner and outer directions of the cylindrical portion 72 by an external force with the fixed end 139a as a fulcrum. The tip of the free end 139 b is at the same height as the open end 129 a of the internal space 129 of the cylindrical portion 72. The claw engagement piece 139 is formed on the inner peripheral surface of the leg portion 141 in the center in the width direction at a position just below the leg portion 141 supported by the fixed end 139a and the free end 139b at the top of the leg portion 141. It has an engaging claw 143 projecting from the space 129. The width of the leg portion 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 141, it is still wider than the width of the engaging claw 143. Therefore, the leg 141 is configured with high rigidity. The lower surface (undercut surface) of the engaging claw 143 constitutes an engaging surface 143 a that is a surface that is substantially orthogonal to the direction in which the motor 76 enters. The engagement surface 143a is disposed at a position below the opening end 129a of the internal space 129 (that is, a position at the back of the internal space 129 relative to the opening end 129a). The engagement surface 143a abuts on the rear end surface 69b of the motor main body 69 and stops the movement of the motor main body 69 in the direction of exiting from the internal space 129. The upper surface of the engaging claw 143 has an inclined surface 143b. An opening 145 is opened at the center in the width direction of the leg 141 and extends linearly downward from a position immediately below the engagement surface 143a. The width of the opening 145 is equal to the width of the engaging surface 143a 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, a design for forming the opening 145 in the leg portion 141 is possible. The upper end surface 145a (FIG. 13) of the opening 145 is configured at the same height as the engaging surface 143a. The opening 145 is opened when the slide outer mold is inserted into this position to mold the engagement surface 143a, which is an undercut surface, during resin molding of the plate outer 68.

  9 to 13, a hole 73a for discharging the motor shaft 78 from the internal space 129 is disposed at the center of the bottom 73 of the internal space 129 of the cylindrical portion 72, and is disposed concentrically with the hole 73a on the outer peripheral side of the hole 73a. A flat circular recess 147 is formed (FIG. 9). A convex portion 149 that is coaxial with the motor shaft 78 and has a circular shape in the axial direction is fitted into the central portion of the front end surface 69a (FIG. 15) of the motor main body 69. Thereby, the shaft center 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 cylindrical portion 72, a support table 151 having a very small height is provided so as to protrude from the four corners of the front end surface 69a of the motor main body 69 and support the front end surface 69a. (FIG. 9). The height from the surface of the support base 151 to the engagement surface 143a is just set to 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. 14 is a plan view of the electric storage unit 16 with the plate outer 68 and the seal cap 90 removed. FIG. 15 shows a cut end view at the DD arrow position in FIG. The arrangement of FIG. 15 will be described. The plate outer 68 is supported in contact with the stepped portion 36b of the frame 36, and is fixed to the frame 36 with screws 82 (FIG. 3). The motor main body 69 is accommodated and held in the cylindrical portion 72 of the plate outer 68. An engagement surface 143 a of the claw engagement piece 139 is engaged with the rear end surface 69 b of the motor main body 69. Thereby, the return of the motor 76 with respect to the cylindrical portion 72, that is, the movement in the direction opposite to the direction of entering the internal space 129 is prevented. A worm 80 is loosely attached to the motor shaft 78. The motor shaft 78 includes a round bar portion 78a on the proximal end side along the axial direction thereof, and an engagement rod portion 78b on the distal end side. The central hole 83 of the worm 80 into which the motor shaft 78 is inserted has a round hole portion 83a that accommodates the round rod portion 78a on the proximal end side along the axial direction thereof, and the engagement portion 78b that accommodates the engagement rod portion 78b on the distal end side. A joint hole 83b is formed. Since the engagement rod portion 78b and the engagement hole portion 83b are non-circular in cross section, they engage in the rotation direction. As a result, when the motor shaft 78 rotates, the worm 80 rotates following this, and the worm wheel 50 rotates following the rotation of the worm 80.

  In the above-described embodiment, the outer peripheral surface of the circular convex portion 119 (FIGS. 10, 11 and the like) on the lower surface of the plate outer 68 is configured as a flat surface, but the outer peripheral surface of the convex portion (43) described in Patent Document 1 Similarly to the formed protrusion (44), a plurality of protrusions for press-fitting the protrusion 119 into the recess 113a can be formed on the outer peripheral surface of the protrusion 119. Moreover, in the said embodiment, although the motor output shaft made to protrude from a motor holding member (plate outer 68) was made into the motor shaft itself, it is not restricted to this. That is, the motor output shaft may be a rotating member (33) that rotates following the rotation of the motor shaft (24), such as the motor output shaft described in Patent Document 1. In the above embodiment, the gear housed in the inner space of the enclosure wall is a worm, but other types of gears may be used. Moreover, although the said embodiment demonstrated the case where this invention was applied to the electrically-driven retractable rear view mirror for vehicles, this invention is not restricted to this. In other words, this invention is a vehicle electric retractable rear view camera for vehicles that is mounted on a vehicle door or the like so as to protrude from the vehicle side instead of a door mirror, other vehicle electric retractable rear view devices for vehicles, and other than rear view uses. It can also be applied to an electric retractable visual recognition device for vehicles. The vehicle retractable rear view camera for a vehicle, for example, has a small visor 14 shown in FIG. 2, and the camera is replaced with a mirror plate so that the optical axis of the camera faces the rear of the vehicle when the visor 14 is in the use position. It can comprise as what was mounted.

DESCRIPTION OF SYMBOLS 10 ... Electric retractable door mirror (electrically retractable visual device for vehicles), 13 ... Vehicle body (right door), 16 ... Electric storage unit, 16b ... Rotating body, 24 ... Shaft, 36 ... Frame, 36c ... Outer wall of frame (frame ), 38... Internal space (space where the power transmission mechanism is arranged), 68... Plate outer (motor holding member), 73 a... Hole, 76. (Motor output shaft), 81 ... power transmission mechanism, 113 ... inner peripheral space, 113a ... concave portion, 115 ... communication path, 119 ... convex portion, 119a ... concave portion, 121 ... enclosure wall, 121d, 121e ... folded portion , 123 ... outer space side void

Claims (12)

A shaft standing on the vehicle body side,
A rotating body supported by the shaft so as to be rotatable in a direction around the axis of the shaft;
A motor mounted on the rotating body;
A power transmission mechanism for transmitting a driving force of the motor to the shaft and rotating the rotating body in a direction around the axis of the shaft;
The rotating body is
A frame made of a resin-based material that holds the power transmission mechanism;
A motor holding member that holds the motor and is supported by the frame, and transmits the rotation of the motor output shaft of the motor to the power transmission mechanism;
The motor holding member has a convex portion, and the convex portion has a hole for projecting the motor output shaft,
The frame has a concave portion into which the convex portion is fitted in a state where the motor holding member is supported on the frame,
The frame has an enclosure wall, an inner circumferential space on the inner periphery of the enclosure wall, and an outer space on the outer periphery of the enclosure wall,
The inner space-side space has the concave portion.   The electric retractable visual recognition device for a vehicle according to claim 1, wherein the surrounding wall has a substantially uniform thickness in a circumferential direction.   The electric storage-type visual recognition device for a vehicle according to claim 1, wherein the outer peripheral side space is configured continuously along a circumferential direction of the enclosure wall. The space on the inner peripheral side of the surrounding wall is connected to the concave portion into which the convex portion is fitted and extends in the depth direction of the concave portion,
A portion connected to the motor output shaft, which is a component of the power transmission mechanism, is accommodated in the extended and configured portion of the inner peripheral space.
The vehicular electric retractable visual recognition device according to any one of claims 1 to 3, wherein the enclosure wall is configured to reach a depth in which the gear is accommodated in a depth direction of the inner circumferential space. The surrounding wall has an opening in a partial region in the circumferential direction;
The said opening comprises the communicating path which connects the inner peripheral side space of the said enclosure wall, and the space of the outer side of this enclosure wall which arrange | positions the said power transmission mechanism. Electric retractable visual recognition device for vehicles.   6. The vehicle according to claim 5, wherein both end portions in the circumferential direction of the enclosure wall are folded back in the outer circumferential direction at the position of the communication path and connected to a portion located on the outer circumferential side of the outer circumferential space of the frame. Electric retractable visual recognition device. The motor holding member is made of a resin-based material,
The electric retractable visual recognition device for a vehicle according to any one of claims 1 to 6, wherein the convex portion is configured in a cylindrical shape having a recess on an inner peripheral side. The enclosure wall has an annular portion, and the recess has a circular portion;
The convex portion has a circular portion that fits into the circular portion of the concave portion,
The electric retractable visual recognition device for a vehicle according to any one of claims 1 to 7, wherein the hole is configured at a center position of the circular portion of the convex portion.   The vehicular electric retractable visual recognition device according to claim 8, wherein the annular portion of the surrounding wall is configured over an angular range of 180 degrees or more in a circumferential direction.   The electric retractable visual recognition device for a vehicle according to claim 8 or 9, wherein the outer peripheral side space has an annular portion coaxial with the enclosure wall.   The electric retractable visual recognition device for a vehicle according to any one of claims 8 to 10, wherein an outer diameter of an annular portion of the enclosure wall is configured to be smaller than an outer diameter of a motor main body portion of the motor. In the frame that holds the power transmission mechanism of the electric storage unit of the electric storage type visual recognition device for vehicles,
The frame is made of a resin-based material,
The frame has an enclosure wall, an inner circumferential space on the inner periphery of the enclosure wall, and an outer space on the outer periphery of the enclosure wall,
The inner circumferential space has a concave portion into which a convex portion that projects a motor output shaft of a motor that drives the power transmission mechanism is fitted.
Such a frame.

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