Automotive rear view mirror assembly

• US 4,915,493 A
• Filed: 01/04/1989
• Issued: 04/10/1990
• Est. Priority Date: 01/04/1989
• Status: Expired due to Term

• Current Assignee: LOWE Engineering Company
• Original Assignee: Magna International Incorporated
• Inventors: Fisher, Robert J., Rawlings, Donald S.
• Primary Examiner(s): Arnold, Bruce Y.
• Assistant Examiner(s): Tran, Tho Van
• Application Number:
  US07/293,459
• Time in Patent Office: 461 Days
• Field of Search: 350/634, 350/633, 350/636, 350/637, 403/90, 403/124
• US Class Current: 359/874
• CPC Class Codes: B60R 1/072 for adjusting the mirror relative to its housing
• CPC Class Codes: G02B 7/1827 Motorised alignment

Abstract

An automotive vehicle rearview mirror assembly comprising a plastic mirror holding member and a plastic support member provided with cooperating integral connecting structures providing for relative pivotal movements about two perpendicular intersecting axes. The connecting structures having a snap-in relation providing large interengaging dual parallel truncated spherical surfaces and smaller interengaging segmental spherical surfaces all having a common centerpoint. The support member connects with a cooperating casing member to form a casing assembly carrying a remotely controlled power operated mechanism for effecting pivotal movements of the mirror holding member. A sensing mechanism is also carried within the casing assembly for enabling the power operated mechanism to be automatically controlled as well as manually controlled. The power operated mechanism includes actuator assemblies each having a pair of actuator members one of which has a snap-in ball and socket connection with the casing member and a lug and notch connection with an associated pinion member. The sensing mechanism includes integral wall portions on the casing member for mounting two spaced sensing members with electrical contacts in cooperating relation with two potentiometer circuits on a single electrical circuit board.

Claims

1. A mirror assembly comprising

a mirror holding member molded of plastic material,

a mirror carried by said mirror holding member,

a support member molded of plastic material and

means for connecting said mirror holding member on said support member for pivotal movements along two intersecting perpendicular axes,

said connecting means comprising

cooperating first and second connecting structures formed integrally on said members respectively,

said first integral connecting structure comprising a projecting base portion having an enlarged portion on a projecting end of said base portion, said enlarged portion having first convex connecting surface means disposed within a first spherical plane having a first pair of parallel truncations one of which is defined by an intersection with said base portion,

said enlarged portion having first concave connecting surface means facing away from said base portion disposed within a first spherical segmental plane having (1) a center coincident with the center of said first spherical plane and (2) a radius smaller than the radius of first spherical plane,

said second integral connecting structure comprising a projecting annular wall having second concave connecting surface means disposed within a second spherical plane having (1) a radius generally equal to the radius of said first truncated spherical plane and (2) a second pair of parallel truncations,

said second integral connecting structure including a projecting central portion within said annular wall having second convex connecting surface means facing in the direction of projection of said annular wall disposed within a second spherical segmental plane having (1) a center coincident with the center of said second spherical plane and (2) a radius equal to the radius of said first spherical segmental plane,

the nature of the plastic material and the construction of said annular wall being such that said annular wall is operable in response to the movement of said enlarged portion therein to resiliently yield and resiliently return to bring (1) the first convex connecting surface means of said enlarged portion into engagement with the second concave connecting surface means of said annular wall so as to retain said first and second integral connecting structures against movement in a direction away from one another and (2) said first concave connecting surface means of said enlarged portion into engagement with the second convex connecting surface means of said projecting central portion so as to limit the movement of said first and second integral connecting structures in a direction toward one another,

the engagement of said connecting surface means permitting relative sliding movement therebetween so as to retain the members in cooperating relation in a multiplicity of different positions of pivotal movement of said mirror holding member with respect to said support member along said two intersecting perpendicular axes.

2. A mirror assembly as defined in claim 1 wherein said first concave connecting surface means comprises a first spherical segmental surface extending throughout said first spherical segmental plane, said first convex connecting surface means includes a first dual truncated spherical surface extending throughout said first spherical plane between the first pair of truncations thereof, said first concave connecting surface means comprises a first spherical segmental surface extending throughout said first spherical segmental plane, said first integral connecting structure including an annular surface extending from said first spherical segmental surface to said first dual truncated spherical surface in outward diverging relation.

3. A mirror assembly as defined in claim 2 wherein said projecting central portion is in the form of a cone having said second convex connecting surface means on the apex thereof, said second convex connecting surface means comprising a second spherical segmental surface extending throughout said second spherical segmental plane.

4. A mirror assembly as defined in claim 3 wherein the angle of divergence of said cone is substantially less than the angle of divergence of said outwardly diverging annular surface.

5. A mirror assembly as defined in claim 4 wherein said connecting means is further operable to prevent pivotal movements between said members about a third axis perpendicular to and intersecting said two intersecting axes, a casing member fixed to said support member and forming therewith a casing assembly, said casing assembly having power operated means mounted therein for effecting pivotal movements of said mirror holding member about said two intersecting perpendicular axes, said power operated means including a pair of power driven actuator assemblies, each of said actuator assemblies including a first actuator member having an end portion extending outwardly of said casing assembly pivotally connected to said mirror holding member and a second actuator member disposed in telescoping relation with said first actuator member along a longitudinally extending telescoping axis, each second actuator member having an integral connecting structure on one end thereof, said casing member having an integral connecting structure thereon having a snap-in relationship with respect to the integral connecting structure on each second actuator member operable when in said snap-in relationship to (1) permit rotational movements about the telescoping axis thereof and pivotal movements about a centerpoint on the telescoping axis thereof and (2) prevent movements in either direction along the telescoping axis thereof, each actuator assembly also including a hollow pinion member disposed in surrounding relation to the associated second actuator member and mounted in said casing member for power driven rotation about a fixed axis, integral means on each pinion member and the associated second actuator member for transmitting rotational movements of the pinion member to corresponding rotational movements of the associated second actuator member about the telescoping axis thereof while accommodating pivotal movements of the associated second actuator member about the center point thereof, the pivotal mounting of each first actuator member being such as to prevent rotational movements thereof about the telescoping axis thereof, and yieldable threaded means between the first and second actuator members of each actuator assembly for effecting telescopic movements of the associated first actuator member along the telescoping axis thereof with respect to the associated second actuator member in response to rotational movements of the associated second actuator member about the telescoping axis thereof.

6. A mirror assembly as defined in claim 5 wherein said integral means on each second actuator member comprises a plurality of annularly spaced notches in an exterior periphery of said disk portion and said integral means on each pinion member comprises a plurality of depending lugs on a low edge thereof fitted with said plurality of notches.

7. A mirror assembly as defined in claim 6 wherein each second actuator member includes a disk shaped portion, the integral connecting structure of each second actuator member comprising a ball portion integral with one side of the associated disk shaped portion in concentric relation therewith, each disk shaped portion having a cylindrical wall portion integral with the other side thereof in concentric relation therewith, said threaded means including exterior threads on an exterior periphery of each cylindrical wall portion.

8. A mirror assembly as defined in claim 7 wherein each first actuator member includes a shaft portion slidably telescopically mounted within the interior periphery of the cylindrical wall member of the associated second actuator member, a plurality of integral annularly spaced longitudinally extending arm portions disposed in radially outwardly spaced relation with respect to said shaft portion, said arm portions having inturned free ends, said threaded means including internal threads formed on said inturned ends threadedly engaging the exterior threads on the cylindrical wall portion of the associated second actuator member.

9. A mirror assembly as defined in claim 8 wherein said mirror holding member has first and second sensing members connected therewith so that said first sensing member moves therewith only when said mirror holding member moves about one of said two intersecting axes and said second sensing member moves therewith only when said mirror holding member moves about the other of said two intersecting axes,

said casing member having spaced first and second integral structures for mounting opposite end portions of said first and second sensing members for generally longitudinal movements corresponding to the movements of the ends thereof with said mirror holding member,

a single electrical circuit board having first and second potentiometer circuits thereon,

first and second electrical contact means carried by the opposite end portions of said first and second sensing members respectively for movements therewith,

and means for mounting said single electrical circuit board in said casing member so that said first and second electrical contact means cooperates with the first and second potentiometer circuits thereon.

10. A mirror assembly as defined in claim 9 wherein said casing member includes an exterior edge portion spaced alongside said circuit board having a plurality of closely spaced notches therein and a plurality of electrical wires connected with the first and second potentiometer circuits of said circuit board and extending therefrom within said plurality of notches, said support member having a cooperating exterior edge portion retaining said wires in said notches.

11. A mirror assembly as defined in claim 10 wherein said power operated means includes first and second electric motors mounted within said casing assembly and having a plurality of electrical motor wires connected therewith, said plurality of motor wires extending within a second plurality of notches in said exterior edge portion of said casing member and retained therein by the cooperating exterior edge portion of said support member.

12. A mirror assembly as defined in claim 11 wherein each of said first and second integral mounting structures comprises an upstanding integral wall of generally C-shaped cross-sectional configuration within which a truncated spherical bulge on the opposite end of the associated sensing member is slidably mounted.

13. A mirror assembly as defined in claim 12 wherein the C-shaped wall mounting said first sensing member opens to one side of said circuit board and the C-shaped wall mounting said second sensing member opens to the opposite side of said circuit board.

14. A mirror assembly as defined in claim 1 wherein said connecting means is further operable to prevent pivotal movements between said members about a third axis perpendicular to and intersecting said two intersecting axes, a casing member fixed to said support member and forming therewith a casing assembly, said casing assembly having power operated means mounted therein for effecting pivotal movements of said mirror holding member about said two intersecting perpendicular axes, said power operated means including a pair of power driven actuator assemblies, each of said actuator assemblies including a first actuator member having an end portion extending outwardly of said casing assembly pivotally connected to said mirror holding member and a second actuator member disposed in telescoping relation with said first actuator member along a longitudinally extending telescoping axis, each second actuator member having an integral connecting structure on one end thereof, said casing member having an integral connecting structure thereon having a snap-in relationship with respect to the integral connecting structure on each second actuator member operable when in said snap-in relationship to (1) permit rotational movements about the telescoping axis thereof and pivotal movements about a centerpoint on the telescoping axis thereof and (2) prevent movements in either direction along the telescoping axis thereof, each actuator assembly also including a hollow pinion member disposed in surrounding relation to the associated second actuator member and mounted in said casing member for power driven rotation about a fixed axis, integral means on each pinion member and the associated second actuator member for transmitting rotational movements of the pinion member to corresponding rotational movements of the associated second actuator member about the telescoping axis thereof while accommodating pivotal movements of the associated second actuator member about the center point thereof, the pivotal mounting of each first actuator member being such as to prevent rotational movements thereof about the telescoping axis thereof, and yieldable threaded means between the first and second actuator members of each actuator assembly for effecting telescopic movements of the associated first actuator member along the telescoping axis thereof with respect to the associated second actuator member in response to rotational movements of the associated second actuator member about the telescoping axis thereof.

15. A mirror assembly as defined in claim 14 wherein said integral means on each second actuator member comprises a plurality of annularly spaced notches in an exterior periphery of said disk portion and said integral means on each pinion member comprises a plurality of depending lugs on a low edge thereof fitted with said plurality of notches.

16. A mirror assembly as defined in claim 15 wherein each second actuator member includes a disk shaped portion, the integral connecting structure of each second actuator member comprising a ball portion integral with one side of the associated disk shaped portion in concentric relation therewith, each disk shaped portion having a cylindrical wall portion integral with the other side thereof in concentric relation therewith, said threaded means including exterior threads on an exterior periphery of each cylindrical wall portion.

17. A mirror assembly as defined in claim 16 wherein each first actuator member includes a shaft portion slidably telescopically mounted within the interior periphery of the cylindrical wall member of the associated second actuator member, a plurality of integral annularly spaced longitudinally extending arm portions disposed in radially outwardly spaced relation with respect to said shaft portion, said arm portions having inturned free ends, said threaded means including internal threads formed on said inturned ends threadedly engaging the exterior threads on the cylindrical wall portion of the associated second actuator member.

18. A mirror assembly as defined in claim 14 wherein said mirror holding member has first and second sensing members connected therewith so that said first sensing member moves therewith only when said mirror holding member moves about one of said two intersecting axes and said second sensing member moves therewith only when said mirror holding member moves about the other of said two intersecting axes,

said casing member having spaced first and second integral structures for mounting opposite end portions of said first and second sensing members for generally longitudinal movements corresponding to the movements of the ends thereof with said mirror holding member,

a single electrical circuit board having first and second potentiometer circuits thereon,

first and second electrical contact means carried by the opposite end portions of said first and second sensing members respectively for movements therewith,

and means for mounting said single electrical circuit board in said casing member so that said first and second electrical contact means cooperates with the first and second potentiometer circuits thereon.

19. A mirror assembly comprising

a mirror holding member,

a mirror carried by said mirror holding member,

a support member,

means for connecting said mirror holding member on said support member for pivotal movements along two intersecting perpendicular axes and for substantially preventing pivotal movements about a third intersecting perpendicular axis,

a casing member fixed to said support member and forming therewith a casing assembly,

said casing assembly having power operated means mounted therein for effecting pivotal movements of said mirror holding member about said two intersecting perpendicular axis,

said power operated means including a pair of power driven actuator assemblies,

each actuator assembly including a member connected to said mirror holding member and a member connected to said casing member,

at least one connection between one member of each actuator assembly and the member to which it is connected comprising cooperating first and second connecting structures formed integrally on the members of said one connection,

said first integral connecting structure comprising a projecting base portion having an enlarged portion on a projecting end of said base portion, said enlarged portion having first convex connecting surface means disposed within a first spherical plane having a first pair of parallel truncations one of which is defined by an intersection with said base portion,

said enlarged portion having first concave connecting surface means facing away from said base portion disposed within a first spherical segmental plane having (1) a center coincident with the center of said first truncated spherical plane and (2) a radius smaller than the radius of aforesaid first truncated spherical plane,

said second integral connecting structure comprising a projecting annular wall having second concave connecting surface means disposed within a second spherical plane having (1) a radius generally equal to the radius of said first truncated spherical plane and (2) a second pair of parallel truncations,

said second integral connecting structure including a projecting central portion within said annular wall having second convex connecting surface means facing in the direction of projection of said annular wall disposed within a second spherical segmental plane having (1) a center coincident with the center of said second truncated spherical plane and (2) a radius equal to the radius of said first spherical segmental plane,

the nature of the plastic material and the construction of said annular wall being such that said annular wall is operable in response to the movement of said enlarged portion therein to resiliently yield and resiliently return to bring the first convex connecting surface means of said enlarged portion into engagement with the second concave connecting surface means of said annular wall and said first concave connecting surface means of said enlarged portion into engagement with the second convex connecting surface means of said projecting central portion, the engagement of said connecting surface means permitting relative sliding movement therebetween so as to retain the members of said one connection in cooperating relation in a multiplicity of different positions of pivotal movement.

20. A mirror assembly as defined in claim 19 wherein said first concave connecting surface means comprises a first spherical segmental surface extending throughout said first spherical segmental plane, said first convex connecting surface means includes a first dual truncated spherical surface extending throughout said first spherical plane between the first pair of truncations thereof, said first concave connecting surface means comprises a first spherical segmental surface extending throughout said first spherical segmental plane, said first integral connecting structure including an annular surface extending from said first spherical segmental surface to said first dual truncated spherical surface in outward diverging relation.

21. A mirror assembly as defined in claim 20 wherein said projecting central portion is in the form of a cone having said second convex connecting surface means on the apex thereof, said second convex connecting surface means comprising a second spherical segmental surface extending throughout said second spherical segmental plane.

22. A mirror assembly as defined in claim 21 wherein the angle of divergence of said cone is substantially less than the angle of divergence of said outwardly diverging annular surface.

23. A mirror assembly comprising

a mirror holding member,

a mirror holding member,

a mirror carried by said mirror holding member,

a support member,

means for connecting said mirror holding member on said support member for pivotal movements along two intersecting perpendicular axes and for substantially preventing pivotal movements about a third intersecting perpendicular axis,

a casing member fixed to said support member and forming therewith a casing assembly,

said casing assembly having power operated means mounted therein for effecting pivotal movements of said mirror holding member about said two intersecting perpendicular axes,

said power operated means including a pair of power driven actuator assemblies,

each of said actuator assemblies including a first actuator member having an end portion extending outwardly of said casing assembly pivotally connected to said mirror holding member and a second actuator member disposed in telescoping relation with said first actuator member along a longitudinally extending telescoping axis,

each second actuator member having an integral connecting structure on one end thereof,

said casing member having an integral connecting structure thereon having a snap-in relationship with respect to the integral connecting structure on each second actuator member operable when in said snap-in relationship to (1) permit rotational movements about the telescoping axis thereof and pivotal movements about a centerpoint on the telescoping axis thereof and (2) prevent movements in either direction along the telescoping axis thereof,

each actuator assembly also including a hollow pinion member disposed in surrounding relation to the associated second actuator member and mounted in said casing member for power driven rotation about a fixed axis,

integral means on each pinion member and the associated second actuator member for transmitting rotational movements of the pinion member to corresponding rotational movements of the associated second actuator member about the telescoping axis thereof while accommodating pivotal movements of the associated second actuator member about the center point thereof,

the pivotal mounting of each first actuator member being such as to prevent rotational movements thereof about the telescoping axis thereof, and

yieldable threaded means between the first and second actuator members of each actuator assembly for effecting telescopic movements of the associated first actuator member along the telescoping axis thereof with respect to the associated second actuator member in response to rotational movements of the associated second actuator member about the telescoping axis thereof.

24. A mirror assembly as defined in claim 23 wherein said integral means on each second actuator member comprises a plurality of annularly spaced notches in an exterior periphery of said disk portion and said integral means on each pinion member comprises a plurality of depending lugs on a low edge thereof fitted with said plurality of notches.

25. A mirror assembly as defined in claim 24 wherein each second actuator member includes a disk shaped portion, the integral connecting structure of each second actuator member comprising a ball portion integral with one side of the associated disk shaped portion in concentric relation therewith, each disk shaped portion having a cylindrical wall portion integral with the other side thereof in concentric relation therewith, said threaded means including exterior threads on an exterior periphery of each cylindrical wall portion.

26. A mirror assembly as defined in claim 25 wherein each first actuator member includes a shaft portion slidably telescopically mounted within the interior periphery of the cylindrical wall member of the associated second actuator member, a plurality of integral annularly spaced longitudinally extending arm portions disposed in radially outwardly spaced relation with respect to said shaft portion, said arm portions having inturned free ends, said threaded means including internal threads formed on said inturned ends threadedly engaging the exterior threads on the cylindrical wall portion of the associated second actuator member.

27. A mirror assembly as defined in claim 23 wherein said mirror holding member has first and second sensing members connected therewith so that said first sensing member moves therewith only when said mirror holding member moves about one of said two intersecting axes and said second sensing member moves therewith only when said mirror holding member moves about the other of said two intersecting axes,

said casing member having spaced first and second integral structures for mounting opposite end portions of said first and second sensing members for generally longitudinal movements corresponding to the movements of the ends thereof with said mirror holding member,

a single electrical circuit board having first and second potentiometer circuits thereon,

first and second electrical contact means carried by the opposite end portions of said first and second sensing members respectively for movements therewith,

and means for mounting said single electrical circuit board in said casing member so that said first and second electrical contact means cooperate with the first and second potentiometer circuits thereon.

28. A mirror assembly comprising

a mirror holding member,

a mirror carried by said mirror holding member,

a support member,

means for connecting said mirror holding member on said support member for pivotal movements along two intersecting perpendicular axes and for substantially preventing pivotal movements about a third intersecting perpendicular axis,

a casing member fixed to said support member and forming therewith a casing assembly,

said casing assembly having power operated means mounted therein for effecting pivotal movements of said mirror holding member about said two intersecting perpendicular axes,

first and second sensing members having ends connected with said mirror holding member so that said first sensing member moves therewith only when said mirror holding member moves about one of said two intersecting axes and said second sensing member moves therewith only when said mirror holding member moves about the other of said two intersecting axes,

said casing member having spaced first and second integral structures for mounting opposite end portions of said first and second sensing members for generally longitudinal movements corresponding to the movements of the ends thereof with said mirror holding member,

a single electrical circuit board having first and second potentiometer circuits thereon,

first and second electrical contact means carried by the opposite end portions of said first and second sensing members respectively for movements therewith,

and means for mounting said single electrical circuit board in said casing member so that said first and second electrical contact means cooperate with the first and second potentiometer circuits thereon.

29. A mirror assembly as defined in claim 28 wherein said casing member includes an exterior edge portion spaced alongside said circuit board having a plurality of closely spaced notches therein and a plurality of electrical wires connected with the first and second potentiometer circuits of said circuit board and extending therefrom within said plurality of notches, said support member having a cooperating exterior edge portion retaining said wires in said notches.

30. A mirror assembly as defined in claim 29 wherein said power operated means includes first and second electric motors mounted within said casing assembly and having a plurality of electrical motor wires connected therewith, said plurality of motor wires extending within a second plurality of notches in said exterior edge portion of said casing member and retained therein by the cooperating exterior edge portion of said support member.

31. A mirror assembly as defined in claim 30 wherein each of said first and second integral mounting structures comprises an upstanding integral wall of generally C-shaped cross-sectional configuration within which a truncated spherical bulge on the opposite end of the associated sensing member is slidably mounted.

32. A mirror assembly as defined in claim 28 wherein the C-shaped wall mounting said first sensing member opens to one side of said circuit board and the C-shaped wall mounting said second sensing member opens to the opposite side of said circuit board.