WO2006040801A1

WO2006040801A1 - Seal structure of mirror angle adjusting device

Info

Publication number: WO2006040801A1
Application number: PCT/JP2004/014949
Authority: WO
Inventors: Hisaya Suzuki
Original assignee: Murakami Corporation
Priority date: 2004-10-08
Filing date: 2004-10-08
Publication date: 2006-04-20

Abstract

A seal structure of a mirror angle adjusting device having a pivot plate (H) fitted to the rear surface side of a mirror (M) and an actuator (A) holding the pivot plate (H), comprising a sensor mounting part (133) to which the contact (135) of a position sensor (A5) detecting the inclination angle of the pivot plate (H) is fitted movably in the forward and backward directions relative to the pivot plate (H), a seal member (138) fitted to the sensor mounting part (133) to shaft-seal the contact (135), and a ring member (213) fitted onto the seal member (138) and bringing the seal member (138) in a locked state. Thus, the seal member (138) can be suitably prevented from coming out.

Description

Specification

Seal structure of mirror angle adjustment device

Technical field

The present invention relates to a seal structure for a specular angle adjustment device.

Background art

[0002] For example, as described in Japanese Patent Application Laid-Open No. 2004-161123, a rear-viewing outer mirror provided on the side of an automobile has a mirror surface angle adjusting device that holds the mirror in a tiltable manner. Built in.

[0003] As shown in FIG. 16, the mirror surface angle adjusting device described in Japanese Patent Application Laid-Open No. 2004-161123 is attached to the rear surface (front surface of the vehicle) side of the mirror M, and via the mirror holder Mh. A pivot plate He for holding the mirror M and an actuator Ac for holding the pivot plate He in a tiltable manner are provided.

[0004] The actuator Ac is provided with an annular receiving portion P having an inner peripheral surface formed into a spherical surface and a rod Q for pushing and pulling the pivot plate He, and the force actuator Ac is not shown in the drawing. Is equipped with a motor that provides the driving force to the rod Q and a gear that transmits the driving force of the motor to the rod Q.

In addition, the pivot plate He includes an annular sliding portion P ′ that is slidably held by the receiving portion P, and a pair of engaging portions (not shown) with which the tips of the rods Q are engaged. Is formed.

[0006] Then, when the rod Q is advanced and retracted by controlling the rotation direction and the rotation amount of the motor, the pivot plate He tilts with respect to the actuator Ac.

[0007] Incidentally, such a mirror surface angle adjusting device is known that includes a position sensor for detecting the tilt angle of a mirror, as described in JP-A-2001-80417. This position sensor has a rod-like contact that can be moved back and forth, which abuts against the back surface of the pivot plate, and the displacement of the contact is detected by a detection element arranged in the vicinity. . In addition, a seal member provided with an O-ring for axially sealing the contact is provided on the upper surface of the housing.

However, the seal member is simply attached to the upper surface of the housing. As a result, the force applied when the contact moves forward / backward may cause the upper surface force to be removed. Disclosure of the invention

[0009] Therefore, the present inventor has advanced research and development to deal with the above-described problems of the prior art, and has come up with the present invention. In other words, it is an aspect of the present invention to provide a sealing structure of a mirror surface angle adjusting device that can suitably prevent the sealing member of the position sensor from coming off.

More specifically, the seal structure of the mirror surface angle adjusting device according to one aspect of the present invention includes a pivot plate attached to the back side of the mirror and an actuator that holds the pivot plate. In the mirror surface angle adjusting device, a contact force of a position sensor that is provided on the actuator and detects a tilt angle of the pivot plate, and is attached to the sensor mounting portion so as to be able to advance and retreat with respect to the pivot plate. The contact member is provided with a seal member that can be shaft-sealed, and a ring-like member that is fitted on the seal member and prevents the seal member from coming off.

In short, the sealing structure of the mirror surface angle adjusting device according to one aspect of the present invention is such that a ring-shaped member is externally fitted to a sealing member mounted on a sensor mounting portion so that a contact can be shaft-sealed. It is. If it does in this way, it will be in the state where the seal member was pinched by the sensor attachment part with the ring-shaped member, and it can prevent suitably that a seal member removes by receiving the force at the time of a contactor going forward and backward. Here, the “ring shape” includes an incomplete “ring” that is discontinuous by a slit or the like that is formed only by a complete “ring” that is continuous in the circumferential direction. The pivot plate holds the mirror and is attached directly to the rear surface of the mirror or indirectly via a mirror holder or the like.

[0012] Further, the ring-shaped member may be formed integrally with a cover fixed to the housing of the actuator! /.

[0013] With this configuration, by fixing the cover to the housing of the actuator, the ring-shaped member can be externally fitted to the seal member at the same time. This simplifies the work during assembly. In addition, it is not necessary to prepare a ring-shaped member separately, and the cost can be reduced. Furthermore, since the cover is integrally formed, once the cover is assembled to the housing, the position of the ring portion relative to the seal member can be displaced. Since it does not occur, it is possible to more suitably prevent the seal member from coming off the sensor mounting portion force.

[0014] Further, the seal member preferably has a bottomed cylindrical shape to be attached to the sensor mounting portion, and a flange portion to which the ring-shaped member is locked is formed in the cylindrical portion. .

[0015] With this configuration, the ring-shaped member can be engaged with the flange portion formed in the cylindrical portion of the seal member, so that the seal member can be more reliably prevented from coming off.

[0016] The aspects and advantages of the present invention described above, as well as other effects and further features, will be described in detail below with reference to the accompanying drawings. Will be more obvious.

Brief Description of Drawings

FIG. 1 is an exploded perspective view showing a mirror surface angle adjusting device for explaining a seal structure of a mirror surface angle adjusting device according to an embodiment of the present invention.

FIG. 2 is a front view of the pivot plate.

3] (a) is a cross-sectional view taken along the line XI-XI in FIG. 2, and (b) is a cross-sectional view taken along the line X2--X2 in FIG.

FIG. 4 is an exploded perspective view of the actuator.

FIG. 5 is a view showing a housing constituting the actuator, wherein (a) is a perspective view with a part broken away, and (b) is a partially enlarged view of (a).

FIG. 6 is a front view of a housing that constitutes the actuator.

[FIG. 7] (a) is a sectional view taken along the line X3-X3 in FIG. 6, and (b) is a sectional view taken along the line X4--X4 in FIG.

FIG. 8 is a schematic diagram for explaining the arrangement of grease grooves.

FIG. 9 is a cross-sectional view of a cover and pressing means constituting the actuator.

FIG. 10 is a perspective view of a rod and a worm wheel that constitute the actuator.

[FIG. 11] (a) is a sectional view of the gear receiving portion of the housing and the gear holding portion of the cover, and (b) is a sectional view of the rod and the worm wheel.

[FIG. 12] (a) and (b) are cross-sectional views for explaining the operation of the mirror surface angle adjusting device.

FIG. 13 is a partially enlarged cross-sectional view of the sensor mounting portion and its vicinity showing the configuration of the position sensor. FIG. 14 is an exploded perspective view for explaining a seal structure.

FIG. 15 (a)-(c) is an explanatory view showing the operation of the position sensor.

FIG. 16 is an exploded perspective view showing a mirror surface angle adjusting device according to the prior art.

BEST MODE FOR CARRYING OUT THE INVENTION

[0018] The best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the following embodiments, a case where a mirror angle adjusting device is built in an outer mirror for rearward viewing provided on a side portion of an automobile will be exemplified. In addition, “front and rear”, “left and right”, and “up and down” in this specification are based on the state in which the outer mirror is attached to the side of the automobile.

A mirror surface angle adjusting device to which a seal structure of a mirror surface angle adjusting device according to an embodiment is applied is attached to the back side (front side in the present embodiment) of a mirror M as shown in FIG. A pivot plate H that holds the mirror M through a mirror holder (not shown) and an actuator A that holds the pivot plate H are provided. The actuator A is fixed to the mirror housing MH (see FIG. 16) or the support frame SF (see FIG. 16) integrally attached to the mirror housing MH.

[0020] (Pivot plate)

The pivot plate H includes an annular accommodating portion HI formed at the center thereof, an inner annular portion H2 surrounding the accommodating portion H1, an outer annular portion H3 surrounding the inner annular portion H2, and the outer annular portion. A plurality of mirror mounting portions H4, H4,... Projecting outside the H3, a plurality of connecting rods H5, H5,... That connect the housing portion HI and the inner annular portion H2, and an inner annular portion H2 and an outer annular portion H3. A plurality of connecting ribs H6, H6,...

The accommodating part HI has a spherical belt shape, and its inner peripheral surface is formed into a spherical surface. A support cap A41, which will be described later, is inserted into the housing portion HI.

[0022] As shown in FIG. 2, the inner annular portion H2 is formed with a plurality of first through holes H21, H21,... Having a circular shape and two second through holes H22, H22 having a rectangular shape. Yes. Further, as shown in FIG. 3 (b), which is a cross-sectional view taken along the line X2-X2 in FIG. 2, an engaging portion H23 having an inner surface formed into a spherical surface is formed on the back side (front side) of the second through hole H22. ing.

[0023] As shown in Fig. 3 (a), which is a cross-sectional view taken along the line XI-XI in Fig. 2, the outer annular portion H3 has an annular shape. A sliding portion H31 and an overhanging portion H32 surrounding the sliding portion H31 are provided.

[0024] As shown in FIG. 1, the sliding portion H31 has a spherical shape, and its outer peripheral surface is formed into a spherical surface. On the outer peripheral surface of the sliding portion H31, a plurality of grooves 311, 311,... Are formed at intervals in the circumferential direction. Each groove 311 is formed at a position facing the connecting rib H6. This groove 311 stores a lubricant such as grease.

[0025] As shown in Figs. 3 (a) and (b), the overhanging portion H32 has a substantially inverted L-shaped cross section! Between the outer surface of the sliding portion H31. An accommodation groove H33 is formed in the inner wall.

[0026] The mirror mounting portion H4 shown in FIG. 1 is a portion with which a hook (not shown) formed on the back side of the mirror holder (not shown) or the back side of the mirror M is engaged. H3

Projected on the outer peripheral surface of 2.

[0027] The connecting rod H5 is arranged so as to partition an annular space between the accommodating portion HI and the inner annular portion H2, and together with the accommodating portion HI and the inner annular portion H2, a fan-shaped opening H51 (see FIG. 2).

[0028] The connecting rib H6 is arranged so as to cut an annular space between the inner annular portion H2 and the outer annular portion H3. As shown in FIG. 3 (b), the connecting rib H6 has a substantially triangular shape, and its end (front end) extends to the end (front end) of the sliding portion H31.

[0029] The pivot plate H can be formed of a synthetic resin such as polyethylene, polypropylene (PP), or polyacetal (POM). In this case, the housing part Hl, the inner annular part H2, the outer annular part H3, the mirror mounting part H4, the connecting rod H5 and the connecting rib H6 can be formed integrally.

[0030] (actuator)

As shown in FIG. 1, the actuator A includes a housing A1 having a bowl shape, a cover A2 fixed to the housing A1, a pair of rods A3 and A3 for pushing and pulling the pivot plate H, and a pivot plate H. A pressing means A4 that presses against the housing A1 side and a pair of position sensors A5 and A5 provided to measure the inclination of the pivot plate H are provided. Further, as shown in FIG. , A pair of motors A6, A6 that provide driving force to A3, and a pair of gears A7, A7 that transmit the driving force of these motors A6, A6 to rods A3, A3, It has.

[0031] As shown in FIG. 5 (a), the housing A1 is formed on the bottom part Al, an annular peripheral wall part A12 formed on the outer peripheral edge of the bottom part All, and an inner peripheral side of the bottom part All. Island-shaped portion A13.

[0032] As shown in Fig. 6, the bottom part Al l is formed in an annular area 1 la arranged so as to surround the island-like part A13, and on the inner peripheral side of the annular area 1 la. A pair of gear installation regions l ib and l ib formed to erode A13 and a plurality of cover installation regions 11c, 11c,. Here, of the pair of gear installation areas l ib and l ib, one gear installation area 11 b is formed at the lowermost part of the annular area 11 a, and the other gear installation area l ib is one of the gear installation areas It is formed obliquely above region l ib. Each gear installation region l ib has an arc at the outer edge, and a male threaded portion 111 projects from the center (see (a) of FIG. 5). A mounting hole 112 is formed in the center of each cover installation area 11c. The mounting hole 112 is formed at a position corresponding to the first through hole H21 of the pivot plate H shown in FIG.

[0033] As shown in FIG. 5A, the peripheral wall portion A12 is formed along the outer peripheral edge of the annular region 11a of the bottom portion All. , 122. Hereinafter, the annular region 121 on the rear side is referred to as “receiving portion 121”, and the annular region 122 on the front side is referred to as “lubricant reservoir 122”. In other words, an annular receiving portion 121 is formed at the rear edge of the Uzing A1.

[0034] The receiving part 121 is a part that tiltably supports the sliding part H31 (see FIG. 1) of the pivot plate H, and has a spherical shape, and is shown in FIGS. 7 (a) and (b). As shown, the inner peripheral surface is formed into a spherical surface. 7A is a cross-sectional view taken along the line X3-X3 in FIG. 6, and FIG. 7B is a cross-sectional view taken along the line X4-X4 in FIG. Here, the radius of the spherical surface constituting the inner peripheral surface of the receiving portion 121 is the radius of the spherical surface constituting the outer peripheral surface of the sliding portion H31 of the pivot plate H (see FIGS. 3A and 3B). It is virtually equal. That is, the receiving part 121 is slidably brought into contact with the outer peripheral surface of the sliding part H3 1 of the pivot plate H (see (a) and (b) of FIG. 3). Further, as shown in FIG. 5 (a), on the inner peripheral surface of the receiving part 121, a plurality of grooves 121a, 121a,... Are formed at intervals in the circumferential direction on the lubricant reservoir 122. ing. In this groove 121a, Lubricants such as grease are stored. As shown in the schematic diagram of FIG. 8, each groove 121a of the receiving portion 121 is located between the grooves 311 and 311 adjacent in the circumferential direction of the sliding portion H31.

[0035] The lubricant reservoir 122 shown in FIG. 5 (a) also has a spherical shape, and the inner peripheral surface is formed into a spherical force. The inner diameter thereof is larger than the inner diameter of the receiving part 121. Therefore, as shown in FIGS. 7A and 7B, a step is formed at the boundary between the receiving portion 121 and the lubricant reservoir 122. The lubricant reservoir 122 is coated with a lubricant such as grease, and the lubricant applied to the lubricant reservoir 122 is applied every time the pivot plate H (see FIG. 1) tilts (ie, , Each time the sliding part H31 slides on the inner peripheral surface of the receiving part 121), each groove 121a of the receiving part 121 and each groove 311, 311 of the sliding part H31 (see FIG. 1). (See Fig. 1)) (that is, after being stored once) or directly from the lubricant reservoir 122 to the inner peripheral surface of the receiving portion 121 and the outer peripheral surface of the sliding portion H31. The smooth tilting motion of plate H will be maintained.

[0036] As shown in FIG. 5 (a), the island-shaped portion A13 is raised to the rear side of the annular region 11a of the bottom portion All, and the outer peripheral edge (outer peripheral surface) 13a is formed on the peripheral wall portion A12. And facing each other with a gap (groove). That is, as shown in FIG. 6, the island-shaped portion A13 is formed on the inner side of the annular region 11a of the bottom portion Al l, and the outer peripheral edge 13a and the peripheral wall portion A12 of the island-shaped portion A13 Are opposed to each other across the annular region 11a.

Here, as shown in FIG. 5 (a), the island-shaped portion A13 includes a pair of gear receiving portions 131, 131 formed corresponding to the pair of male screw portions 111, 111, and two Motor housing part 132 that accommodates motors A6 and A6 (see Fig. 2), a pair of sensor mounting parts 133 and 133 formed on both sides of the motor housing part 132, and each gear receiving part 131. And a plurality of supporting wall portions 134, 134,.

[0038] The gear receiving portion 131 is a portion that supports the outer peripheral surface of the front end portion of a worm wheel A71 (see FIG. 4), which will be described later, and as shown in FIG. 5 (b), around the male screw portion 111. It is formed. In the present embodiment, the gear receiving portion 131 has a substantially C-shape (arc shape), and is formed on the inner peripheral side of the annular region 11a of the bottom portion All. In this way, the volume of the gear receiving portion 131 can be reduced compared to the case where the gear receiving portion 131 is not formed in a ring shape and is formed in an annular shape. As a result, the housing A1 can be downsized. Can be It becomes ability. Furthermore, even if water enters the inside of the actuator A, the gear receiving portion 1 31 is not formed in a complete annular shape, so its inner peripheral portion (that is, around the male screw portion 11 1) There is no trap of water.

[0039] The configuration of the gear receiving portion 131 will be described in more detail. The gear receiving portion 131 includes a first arcuate surface 131a facing the outer peripheral surface of the male screw portion 111, and the male screw portion 111 on the outer peripheral side. A second arc surface 131b facing the outer peripheral surface, and a third arc surface 131c formed between the first arc surface 131a and the second arc surface 131b are provided. The center angle of each arcuate surface 131a, 131b, 131c (that is, the center angle Θ of gear receiving portion 131 (see FIG. 6)) is preferably larger than 180 degrees and smaller than 360 degrees. In this way, it is possible to stably support the worm wheel A71, and as a result, it is possible to suppress the “blurring” in the horizontal direction or the vertical direction that occurs when the worm wheel A71 (see FIG. 4) rotates. It becomes possible. Each arc surface 131a, 131b, 131c may be formed at least at a position facing the male screw portion 111.

[0040] As shown in FIG. 6, the motor accommodating portion 132 is formed so that the central partial force of the island-shaped portion A13 extends to the portion reaching the upper right portion. In the present embodiment, the frame portion 132a having a substantially rectangular shape is formed. And a plurality of ribs 132b, 132b,... Formed inside the frame portion 132a. The upper side of the frame portion 132a is formed in an arc shape along the outer peripheral edge 13a of the island-shaped portion A13, and a notch 132c through which a worm A72, which will be described later, is passed is formed at the lower side of the frame portion 132a. Is formed. The rib 132b is formed to match the outer shape of the motor A6 (see FIG. 4). In addition, terminal holes 132d are formed at three power locations in the upper portion of the motor housing portion 132. If the terminal hole 132d is provided at the top of the nosing A1, even if water enters the inside of the actuator A, the terminal of the motor A6 (see Fig. 4) may be immersed in the water. Absent.

[0041] The sensor mounting portion 133 shown in FIG. 5 (a) is a part that accommodates various components constituting the position sensor A5 (see FIG. 1), and is formed in a cylindrical shape in this embodiment. . As shown in FIG. 6, one of the pair of sensor mounting parts 133, 133, one sensor mounting part 133 is formed on the uppermost part of the island-shaped part A13, and the other sensor mounting part 133 is one side. The sensor mounting portion 133 is formed obliquely below. Here, the motor housing part 132 is sandwiched up and down. The segment connecting the male threaded part 111 facing the sensor and the sensor mounting part 133 is perpendicular to the line segment connecting the male threaded part 111 facing the left and right across the motor housing part 132 and the sensor mounting part 133. I am in charge.

[0042] The support wall 134 is a portion that supports a cover A2 (see FIG. 4) described later. In this embodiment, the support wall 134 is formed at each of the large and small points! Speak.

[0043] The housing A1 may be formed of a synthetic resin such as polyethylene, acrylonitrile 'butadiene' styrene resin (ABS resin), polybutylene terephthalate (PBT resin), polyamide (PA), or the like. it can. In this case, the bottom part All, the peripheral wall part A12, and the island-like part A13 can be formed integrally.

[0044] The cover A2 shown in FIG. 4 is a main body part that covers the island-like part 13 (see FIG. 5A) of the housing A1.

A21 and a plurality of legs A22, A22,... Formed around the body A21

[0045] The main body A21 includes a pair of gear holding portions 211 and 211 formed corresponding to the gear receiving portions 131 and 131 (see FIG. 5A), and a motor cover portion 212 that closes the motor housing portion 132. And a pair of ring portions 213 and 213 formed corresponding to the sensor mounting portions 133 and 133, a boss 214 protruding from the rear surface of the motor cover portion 212, and a boss 214 which is arranged to surround the boss 214. There are four pieces of Succino 215, 215, ...

[0046] The gear holding portion 211 is a portion that mainly holds a worm wheel A71, which will be described later, in a state in which the worm wheel A71 cannot be pulled out in the central axis direction and is rotatable around the central axis. Hold. The gear holding portion 211 is formed with a circular opening portion 211a. As shown in FIG. 11A, the peripheral portion of the opening portion 21 la on the housing A1 side is more than the opening portion 21 la. An annular step 21 lb with a large diameter is formed.

Further, as shown in FIG. 9, a cover-side motor housing portion 212 a is recessed on the housing A 1 side of the motor cover portion 212 corresponding to the motor housing portion 132, and the motor cover portion 212 is attached to the motor cover portion 212. When the motor housing part 132 is covered, a substantially watertight space is formed.

[0048] The ring portion 213 shown in FIG. 4 is formed on the outer edge portion of the main body portion A21, and is attached to the sensor attachment portion 133 when the cover A2 is assembled to the nosing A1 (see FIG. 1). .

[0049] The boss 214 is formed in a bottomed cylindrical shape, and as shown in FIG. A screw A43 for holding the one cap A41 is screwed.

[0050] The stopper 215 shown in FIG. 4 is a part that restricts the pivot plate H (see FIG. 1) from rotating in the circumferential direction of the receiving portion 121. When the pivot plate H is assembled to the actuator A, The protruding end portion enters the opening H51 (see FIG. 2) of the pivot plate H. As shown in FIG. 1, the stopper 215 is surrounded by the receiving portion 121 in a state where the cover A2 is assembled to the housing A1. As described above, when the stopper 215 is formed on the inner peripheral side of the housing A1, the internal space of the housing A1 can be used effectively, and the mirror angle adjustment device can be downsized. .

[0051] The leg A22 shown in FIG. 4 is formed at a position corresponding to the cover installation region 11c of the housing A1 (see FIGS. 5A and 6). The leg portion A22 includes a peripheral wall 222 having a substantially C shape, and as shown in FIG. 9, a screw hole 222 leading to the mounting hole 112 of the housing A1 is formed at the bottom thereof. In order to fix the cover A2 to the nosing A1, a screw (not shown) is inserted from the rear side into the screw hole 222 of the cover A2 and the mounting hole 112 of the housing A1, and the shaft portion of the screw protruding forward is shown in FIG. A nut not shown can be screwed together. Since the position of the mounting hole 112 of the housing A1 and the position of the first through hole H21 of the pivot plate H correspond to each other, a tool (not shown) is inserted into the leg A22 from the first through hole H21. You can do it.

[0052] The cover A2 can be molded from a synthetic resin such as polyethylene, acrylonitrile 'butadiene' styrene resin (ABS resin), polybutylene 'terephthalate (PBT resin), polyamide (PA), for example. . In this case, the main body A21 and the leg A22 can be formed integrally.

[0053] The rod A3 shown in Fig. 1 moves back and forth in the front-rear direction and pushes and pulls the pivot plate H. As shown in Fig. 10, the rod A3 is formed at the cylindrical portion A31 and the tip of the cylindrical portion A31. A pivot A 32 and a pair of flanges A33 and A33 projecting from the outer peripheral surface of the cylindrical portion A31 are provided.

[0054] The cylindrical portion A31 has a cylindrical shape, and is wrapped around the male screw portion 111 of the housing A1, as shown in Fig. 11 (b). The base end of the cylindrical portion A31 is divided into a plurality of small pieces by a plurality of slits (see FIG. 10), and a claw that engages with the thread of the male threaded portion 111 on the inner peripheral surface of the small piece. Part 312 is formed. Therefore, the cylindrical part A31 is placed in the male threaded part 111. When pivoting around the center axis, the pivot A32 moves forward along the axial direction of the male threaded portion 111.

[0055] The pivot A32 has a spherical outer surface and is engaged with an engaging portion H23 of the pivot plate H shown in Fig. 3 (b). In this embodiment, the pivot A32 engages with the engaging portion H23 in a state where it cannot be removed, but its outer surface is slidably in contact with the inner surface of the engaging portion H23.

[0056] In the present embodiment, when the rod A3 arranged at the lower part of the housing A1 is moved back and forth among the pair of rods A3 and A3 shown in Fig. 1, the pivot plate H (that is, the mirror M) Is tilted up and down around the housing part HI, and when the other rod A3 is moved forward and backward, the pivot plate H (that is, the mirror M) tilts left and right around the housing part HI. At this time, the tilting force of the pivot plate H is detected by a position sensor A5 described later.

[0057] The pressing means A4 shown in FIG. 1 is for urging the pivot plate H to the front side (that is, the actuator A side) and coupling the pivot plate H to the actuator A while maintaining the urged state. A support cap A41 fitted in the housing part HI of the pivot plate H, an urging member A42 for applying a pressing force to the support cap A41, a screw A43 screwed to the boss 214 of the actuator U, And a washer A44 mounted around the screw A43.

[0058] The support cap A41 has a spherical band shape, and its outer peripheral surface is formed into a spherical surface. Here, as shown in FIG. 9, the radius of the spherical surface constituting the outer peripheral surface of the support cap A41 is substantially equal to the radius of the spherical surface constituting the inner peripheral surface of the accommodating portion H1 of the pivot plate H. ing. That is, the outer peripheral surface of the support cap A41 is slidably brought into contact with the inner peripheral surface of the accommodating portion HI of the pivot plate H.

[0059] The urging member A42 is mounted between the support cap A41 and the washer A44 in a compressed state, and presses the support cap A41 toward the actuator A by its restoring force. In this embodiment, the force using the coil panel as the urging member A42 is not limited to this. Needless to say!

[0060] The washer A44 is formed in a size and shape substantially equal to the rear end surface of the support cap A41. It is. As a result, the support cap A41 is prevented from being detached from the housing portion HI.

[0061] The configuration of the pressing means A4 is not limited to the configuration shown in the drawing as long as the support cap A41 can be pressed toward the actuator A side. For example, a dish panel may be used as the force urging member A42 (not shown). In this case, the pan panel is placed at the position of the washer A44.

The position sensor A5 is arranged for the purpose of detecting the inclination of the pivot plate H, and is attached to the sensor attachment portion 133 in this embodiment. As shown in FIG. 13, the position sensor A5 mainly includes a contact 135, a slider 136, and a magnetic detection element 145. The contact 135 moves forward and backward in response to the tilt of the pivot plate H, and is formed at the cylindrical portion 135a, an abutting portion 135b formed at one end of the cylindrical portion 135a, and the other end of the cylindrical portion 135a. Flange 135c. One end side of a coil panel 139a attached to one end side of the slider 136 is accommodated in the cylindrical portion 135a. The contact portion 135b has a hemispherical shape, and contacts the inner surface (not shown) of the inner annular portion H2 of the pivot plate H in a state where the pivot plate H is assembled to the actuator A. The flange 135c is formed to a size that engages with the inner step of the opening 133a formed in the sensor mounting portion 133. Thereby, the sensor mounting part 133 is prevented from coming off. The inner surface side of the flange 135c is opened in a tapered shape.

[0063] The slider 136 contains a magnet 137. The other end of the coil panel 139a is held by a guide 136a protruding from one end side, and the holding portion 136b protruding from the other end side is connected to the slider 136b. One end of the oil spring 139b is held. The magnet 137 is accommodated in the slider 136 so that the side portion slightly protrudes to the side of the slider 136 (the magnetic detection element 145 side). The guide 136a is formed in a size that can be inserted into the cylindrical portion 135a of the contact 135 with the coil panel 139a interposed therebetween.

[0064] Here, different types of coil panel 139a, 139b are used at both ends of the contact 135, and in this embodiment, the panel constant of the coil panel 139a is greater than the spring constant of the coil panel 139b. A small one is used. Then, when the slider 136 is mounted in the sensor mounting portion 133, the slider 136 is held between the coil panels 139a and 139b so that the corner portion is pressed against the stepped portion 133b formed on the inner surface of the sensor mounting portion 133. The It is. At this time, the slider 136 is positioned approximately in the center of the sliding direction (advancing / retreating direction) in the sensor mounting portion 133, and about half of the magnet 136 is applied to the magnetic detection element 145 disposed on the side. It is in a state where it takes. Actually, with the pivot plate H attached to the actuator A, the contact 135 is attached to the sensor attachment portion 133 while being urged toward the pivot plate H side. The part 135b always contacts the front side (back side) of the pivot plate H, and advances and retreats following the tilting motion of the pivot plate H. The other end of the coil panel 139b is held by a mounting portion 141 provided at a facing portion of the lower cover 140 of the actuator A.

The magnetic detection element 145 is a Hall element or a magnetoresistive effect element, and converts the magnetic flux density that changes depending on the distance from the magnet 137 provided on the slider 136 into a voltage, whereby the contact 135 advances and retreats. It is designed to detect movement. The magnetic detection element 145 is disposed in a recess 217 provided on the side of the sensor mounting portion 133.

[0066] The sensor mounting portion 133 in which various components of the position sensor A5 are accommodated has a bottomed cylindrical sealing member 138 having a through hole 138a formed at one end, as shown in FIG. The contact 135 is attached so that it can be sealed. A flange portion 138 b is formed at the end of the cylindrical portion of the seal member 138. On the other hand, as shown in FIG. 4, the cover A2 (motor cover section 212) fixed to the housing A1 of the actuator A has a ring section 213 (ring-shaped member) at a position corresponding to the sensor mounting section 133. As shown in FIGS. 13 and 14, the ring portion 213 is externally fitted to the seal member 138 so as to prevent the seal member 138 from coming off. ing. Further, in the present embodiment, the end of the ring part 213 is locked to the flange part 138b of the seal member 138 in a state where the ring part 213 is externally fitted to the seal member 138! /, The

Here, the operation of the position sensor A5 will be described with reference to each drawing of FIG. Fig. 15 (a) is a cross-sectional view showing the state when the contact 135 is in the uppermost position or in the vicinity of the uppermost position, and Fig. 15 (b) is the state when the contact 135 is pushed in the uppermost position or the force near the uppermost position. FIG. 15 (c) is a cross-sectional view showing a state when the contact 135 is further pushed in from the state of FIG. 15 (b). In each figure of FIG. 15, sections other than slider 136 are shown in cross section.

^: Seven. The state shown in Fig. 15 (a) is, for example, when the pivot plate H not shown in this figure is tilted to a large extent, and the contact 135 is not pushed in, or if not, is negligible. In other words, the relative position between the magnetism detecting element 145 and the magnet 137 of the slider 136 is separated. From this state, as shown in FIG. 15 (b), when the contact 135 is pushed following the tilting motion of the pivot plate H, the magnetic sensing element 145 is also moved in the pushing direction. The relative position of 145 and slider 136 relative to magnet 137 contracts. As a result, the magnetic flux density detected by the magnetic detection element 145 changes, and the movement of the contact 135, that is, the tilt of the pivot plate H is detected.

Further, from this state, as shown in FIG. 15 (c), when the contactor 135 is further pushed in following the tilting motion of the pivot plate H, the magnetic detection element 145 is also moved in the pushing direction. Accordingly, the relative position between the magnetic detection element 145 and the magnet 137 of the slider 136 is further reduced. Thereby, the magnetic flux density detected by the magnetic detection element 145 further changes, and the movement of the contact 135, that is, the tilt of the pivot plate H is detected.

[0069] Here, the coil panel 139a, 139b holding both ends of the slider 136 uses a panel panel constant of the coil panel 139a smaller than the spring constant of the coil panel 139b as described above. The advance / retreat amount of the slider 136 is converted to be smaller than the advance / retreat amount of the child 135. Thereby, the advance / retreat of the contact 135 having a large advance / retreat amount can be detected by the small magnetic detection element 145.

A motor A6 shown in FIG. 4 includes a motor main body A61 and a pair of male terminals A62 and A62 protruding from the motor main body A61. The pair of male terminals A62, A62 are connected to the adapter A63. The adapter A63 is interposed between a pair of motors A6, A6 arranged in parallel and a terminal plate A64 attached to the front side of the housing A1, and is connected to the pair of motors A6, A6. A total of four female terminals 631 to which a total of four male terminals A62 of the pair of motors A6 and A6 can be connected are formed on the facing surface, and the surface facing the motor housing portion 132 is Three female terminals (not shown) corresponding to the terminal holes 132d (see FIG. 5 (a)) are formed. One of the two female terminals 631, 631 to which the male terminals A62, A62 of one motor A6 are connected, and the two female terminals 631, to which the male terminals A62, A62 of the other motor A6 are connected. One of 631 is shorted inside adapter A63. ing.

[0071] The gear A7 shown in FIG. 4 is configured to include a worm wheel A71 mounted on the male screw portion 111 of the housing A1 and a worm A72 attached to the output shaft of the motor A6. The worm A72 meshes with the gear portion 711 (see FIG. 10) of the worm wheel A71 and transmits the rotational force of the motor A6 to the worm wheel A71.

[0072] The worm wheel A71 transmits the rotational force of the motor A6 transmitted from the worm A72 to the rod A3, and the rod A3 can be accommodated between the inner peripheral surface thereof and the outer peripheral surface of the male screw portion 111. It is attached to the male thread part 111 with a sufficient clearance.

[0073] The configuration of the worm wheel A71 will be described in more detail. As shown in Fig. 10, the worm wheel A71 includes an annular gear portion 711 having teeth formed on the outer peripheral surface, and an inner portion of the gear portion 711. An outer cylindrical portion 712 formed on the peripheral surface side, an inner cylindrical portion 713 formed on the inner peripheral surface side of the outer cylindrical portion 712, and an engagement formed on the outer peripheral surface of the rear end portion of the inner cylindrical portion 713 With stop 714.

[0074] The outer cylindrical portion 712 has a front end portion and a rear end portion protruding from the gear portion 711 (see (b) of FIG. 11), and an outer peripheral surface of the protruding portion is formed into a cylindrical surface. . Note that the cylindrical surface of the front end portion of the outer cylindrical portion 712 is slidably abutted on the second arc surface 131b of the gear receiving portion 131 of the housing A1 shown in FIG. 11 (a) and (b)), the entire cylindrical surface of the rear end portion is slidably brought into contact with the annular step portion 21 lb of the cover A2 shown in FIG. 11 (a).

As shown in FIG. 10, the inner cylindrical portion 713 has a front end portion and a rear end portion protruding from the outer cylindrical portion 712, and an outer peripheral surface of the protruding portion is formed into a cylindrical surface. The inner cylinder portion 713 is divided into a plurality (four in this embodiment) of pieces 713b, 713b,... By a plurality of slits 713a, 713a,. Each piece 7 13b is elastically deformable by inward force. Further, the cylindrical surface at the front end of the inner cylindrical portion 713 is slidably in contact with the first circular surface 131a of the gear receiving portion 131 of the nosing A1 shown in FIG. 5 (b). (See (a) and (b) of FIG. 11), the entire circumference of the cylindrical surface of the rear end part is slidably brought into contact with the opening 21 la of the cover A2 shown in (a) of FIG. As shown in FIG. 10, the slit 713a is continuous along the central axis direction of the inner cylindrical portion 713. Is formed. Further, the flange A33 of the rod A3 is engaged with the slit 713a.

As shown in FIG. 10, the locking portion 714 is a ridge force projecting along the circumferential direction of the inner cylindrical portion 713 on the outer surface of the rear end portion of the inner cylindrical portion 713. As shown in (b), the gear holding portion 211 is locked to the periphery of the opening 21 la. This prevents the worm wheel A71 from being pulled out from the opening 21 la. Although illustration is omitted, a groove that is recessed along the circumferential direction of the inner cylinder portion 713 may be used as the locking portion 714. In this case, it is preferable that a protrusion that fits into the groove is formed on the opening 21 la of the gear holding portion 211.

[0077] In order to assemble the worm wheel A71 having such a configuration to the actuator A, the rear end portion is held by the gear holding portion 211 of the cover A2, and the cover A2 is moved to a predetermined position of the housing A1. Fix it. In order to engage the rear end portion of the worm wheel A71 with the gear holding portion 211 of the force bar A2, the rear end portion of the inner cylindrical portion 713 of the worm wheel A71 is elastically deformed inward while the gear holding portion 211 is opened. What is necessary is just to insert in the part 21 la and to lock the locking part 714 to the periphery of the opening 21 la of the gear holding part 211.

[0078] When such a worm wheel A71 mounting structure is adopted, the worm wheel A71 can be moved in the direction of the central axis (front and rear) simply by fitting the rear end of the worm wheel A71 into the gear holding portion 211 of the cover A2. Direction) and is held by the gear holder 211 so that it can slide and rotate around the central axis (circumferential direction). As a result, the assembly work of the actuator A can be simplified. In the present embodiment, at the front end portion of the worm wheel A71, at least half of the outer peripheral surface of the inner cylindrical portion 713 abuts on the first circular arc surface 131a of the gear receiving portion 131 shown in FIG. Further, more than a half of the outer circumferential surface of the outer cylindrical portion 712 abuts on the second arc surface 131b of the gear receiving portion 131 shown in FIG.5 (b), so that the front end portion of the worm wheel A71 does not shake vertically and horizontally. .

Here, the operation of the actuator A will be described with reference to FIG. 1 and FIG. When the motor A6 is rotated in an appropriate direction by controlling a controller (not shown), the rotational force of the motor A6 is transmitted to the worm wheel A71 via the worm A72, and the worm wheel A71 is connected to the male screw portion 111 of the housing A1. Rotate around. When the worm wheel A71 is rotated, the flange A33 (see Fig. 10) of the rod A3 becomes the slit 713a of the worm hoist A71 (Fig. 1). (See 0), the rod A3 rotates around the male thread 111 in conjunction with the rotation of the worm wheel A71. Further, since the claw portion 3 12 (see FIG. 11) of the rod A3 is screwed into the thread of the male screw portion 111, the rod A3 rotates around the male screw portion 111 while the male screw portion 111 is rotated. As a result, the rod A3 pushes and pulls the pivot plate H back and forth, and the pivot plate H tilts with respect to the actuator A ((a in FIG. 12). ) And (b))

[0080] In the mirror surface angle adjusting device to which the seal structure of the mirror surface angle adjusting device configured as described above is applied, the rod of the actuator A that pushes and pulls the pivot plate H as shown in FIG. Since A3 and A3 are arranged inside the receiving part 121 that supports the pivot plate H, the load acting on the mirror M mainly acts on the receiving part 121. Therefore, the mirror M can be stably held even when the coupling portion between the rod A3 and the pivot plate H is loose or when there is a dimensional error or a mounting error in the rod A3 itself. In addition, since the annular sliding portion H31 formed on the pivot plate H always abuts on the annular receiving portion 121 formed on the housing A1, the contact portion force water or dust may enter. Therefore, it is possible to omit or prevent simplification of the water stop measures for the periphery of the rod A3 arranged inside the receiving portion 121.

[0081] Since the stability of the mirror increases in proportion to the size of the receiving part 121, it is desirable to make the receiving part 121 as large as possible. From this point of view, it is desirable to make the housing A1 as small as possible. However, in this embodiment, the shape of the housing A1 is a bowl shape, and the edge of the housing A1 is used to maximize the size of the housing A1. Since the receiving part 121 is formed, it is possible to reduce the size of the housing A1 while ensuring the size of the receiving part 121 that can stably hold the pivot plate H, and thus the mirror angle adjustment device can be reduced in size. Can be realized.

[0082] In the seal structure of the mirror surface angle adjusting device, the ring portion 213 is externally fitted to the seal member 138 attached to the sensor attachment portion 133 so that the contact 135 of the position sensor 5A can be sealed. Since the seal member 138 has a ring part 213, the sensor mounting part 1 Thus, it is possible to suitably prevent the seal member 138 from coming off due to the force when the contact 135 moves forward and backward.

[0083] Further, since the ring portion 213 is integrally formed with the motor cover portion 212 fixed to the housing A1 of the actuator A, the motor cover portion 212 is fixed to the housing A1 of the actuator A at the same time. The ring portion 213 can be externally fitted to the seal member 138. Thereby, the work at the time of assembly can be simplified. In addition, it is not necessary to prepare a ring-shaped member separately, and the cost can be reduced. Furthermore, since the motor cover part 212 is once assembled to the housing A1, the ring part 213 is not displaced relative to the seal member 138. It is possible to more suitably prevent the seal member 138 from being detached from the sensor mounting portion 133.

[0084] Further, the seal member 138 has a bottomed cylindrical shape that is attached to the sensor mounting portion 133 so that the contact 135 can be passed therethrough, and a flange portion 138b to which the ring portion 213 is locked is a cylindrical portion. [Because it is formed, it is possible to lock the flange 咅 138b of the sheath ridge material 138 [this ring 咅], and more reliably prevent the seal member 138 from coming off.

[0085] While exemplary embodiments of the invention have been described above, various modifications may be made to this embodiment without departing from the spirit and scope of the invention as defined in the appended claims. Modifications and changes are possible.

[0086] For example, in the embodiment described above, there is no limitation on the form as long as it is provided with an annular receiving portion that is not limited to force using a housing having a bowl shape. Absent. The pivot plate is not limited in its form as long as it has an annular sliding portion.

Further, in the above-described embodiment, the mirror surface angle adjusting device having the configuration in which the sliding portion of the pivot plate enters the inside of the receiving portion of the actuator is exemplified. However, the actuator is arranged inside the sliding portion of the pivot plate. Even if it is the structure which the receiving part of enters, it does not interfere. In other words, the mirror surface angle adjusting device may be configured such that the inner peripheral surface of the sliding portion of the pivot plate and the outer peripheral surface of the receiving portion of the actuator are in contact with each other.

Claims

The scope of the claims

[1] A pivot plate attached to the back side of the mirror,

A mirror surface angle adjusting device having an actuator for holding the pivot plate;

Contact force of a position sensor that is provided in the actuator and detects a tilt angle of the pivot plate. A sensor mounting portion that is fitted to the pivot plate so as to be able to advance and retract.

The sensor mounting portion includes: a seal member on which the contactor is mounted so as to be shaft-sealable; and a ring-shaped member that is externally fitted to the seal member and prevents the seal member from coming off. Seal structure of mirror surface angle adjustment device.

[2] The seal structure for a specular angle adjustment device according to claim 1, wherein the ring-shaped member is formed integrally with a cover fixed to the housing of the actuator.

[3] The seal member has a bottomed cylindrical shape to be attached to the sensor mounting portion, and a flange portion to which the ring-shaped member is locked is formed in the cylindrical portion. The sealing structure of the mirror surface angle adjusting device according to claim 1 of the scope of the request.