Wiper blade and wiper system having the same

• US 7,603,742 B2
• Filed: 12/28/2004
• Issued: 10/20/2009
• Est. Priority Date: 01/30/2004
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: ASMO Company Limited (DENSO Corporation)
• Inventors: Kobayashi, Yukio, Takagi, Atsushi, Yano, Motoyasu, Hirota, Yoshito, Torii, Naoki, Nakano, Hiroyuki, Saito, Toshihiro, Matsumoto, Hiroshi
• Primary Examiner(s): Graham; Gary K
• Application Number:
  US11/022,893
• Publication Number:
  US 20050166349A1
• Time in Patent Office: 1,757 Days
• Field of Search: 152/502.01, 152/504.3, 152/504.4, 152/503.61
• US Class Current: 15/250.201
• CPC Class Codes: B60S 1/3806 Means, or measures taken, for influencing the aerodynamic quality of the wiper blades

Abstract

A lever assembly holds a wiper strip, which directly wipes a wiping surface. The lever assembly includes a plurality of levers, which are connected together in tournament style. An axial length of the lever assembly is shorter than an axial length of the wiper strip. A cover member receives the lever assembly, and opposed ends of the cover member hold the wiper strip. The cover member includes a plurality of cover portions, which are formed separately from one another.

Claims

1. A wiper blade comprising:

a wiper strip that directly wipes a wiping surface;

a lever assembly that holds the wiper strip and includes a plurality of levers, which are connected together in tournament style, wherein an axial length of the lever assembly is shorter than an axial length of the wiper strip; and

a cover member that receives the lever assembly, wherein;

opposed ends of the cover member hold the wiper strip;

the cover member includes a plurality of cover portions, which are formed separately from one another;

one of the ends of the cover member slidably holds the wiper strip; and

the other one of the ends of the cover member non-slidably holds the wiper strip.

2. The wiper blade according to claim 1, wherein the plurality of cover portions includes:

a stationary cover portion; and

at least one movable cover portion, which is pivotable relative to the stationary cover portion.

3. The wiper blade according to claim 2, wherein:

the at least one movable cover portion includes two movable cover portions, which are arranged on opposite sides, respectively, of the stationary cover portion; and

the two movable cover portions are formed symmetrically about the stationary cover.

4. The wiper blade according to claim 2, wherein:

the at least one movable cover portion includes two movable cover portions, which are arranged on opposite sides, respectively, of the stationary cover portion; and

the two movable cover portions are formed asymmetrically about the stationary cover portion.

5. The wiper blade according to claim 2, wherein an axial extent of a boundary between a front side opposing part of the stationary cover portion and a front side opposing part of an adjacent one of the at least one movable cover portion, which are opposed to each other in the axial direction of the wiper blade, does not overlap with an axial extent of a boundary between a rear side opposing part of the stationary cover portion and a rear side opposing part of the adjacent one of the at least one movable cover portion, which are opposed to each other in the axial direction of the wiper blade.

6. The wiper blade according to claim 5, wherein:

one of the front side opposing part and the rear side opposing part of the adjacent one of the at least one movable cover portion is convexly curved along an imaginary arc, which is centered at a pivotal axis of the adjacent one of the at least one movable cover portion; and

the other one of the front side opposing part and the rear side opposing part of the adjacent one of the at least one movable cover portion is concavely curved along the imaginary arc, which is centered at the pivotal axis of the adjacent one of the at least one movable cover portion.

7. The wiper blade according to claim 2, wherein at least one of the at least one movable cover portion is pivotably joined to a corresponding one of the plurality of levers.

8. The wiper blade according to claim 2, wherein:

the at least one movable cover portion includes a plurality of movable cover portions; and

at least one of the plurality of movable cover portions is pivotably joined to at least another one of the plurality of movable cover portions.

9. The wiper blade according to claim 2, wherein:

each of the at least one movable cover portion has at least one connecting projection, which forms a pivotal axis of the movable cover portion; and

one of the plurality of levers has at least one connecting hole, each of which receives a corresponding one of the at least one connecting projection of the at least one movable cover portion.

10. The wiper blade according to claim 2, wherein a base end of at least one of the at least one movable cover portion is received in the stationary cover portion.

11. The wiper blade according to claim 1, wherein:

the plurality of levers includes;

a primary lever for connecting with a wiper arm; and

a plurality of secondary levers, which are pivotably joined to the primary lever; and

at least one of the plurality of cover portions includes;

at least one limiting part, which contacts the primary lever in a transverse direction of the wiper blade to set a transverse position of the at least one of the plurality of cover portions with respect to the primary lever; and

at least one projection, each of which projects from a corresponding one of the at least one limiting part toward a transverse center of the wiper blade.

12. The wiper blade according to claim 11, wherein a projecting length of each of the at least one projection of each of the at least one of the plurality of cover portions, which projects from the corresponding one of the at least one limiting part of the at least one of the plurality of cover portions, is equal to or smaller than a wall thickness of the primary lever.

13. The wiper blade according to claim 11, wherein:

the primary lever includes at least one connecting hole; and

each of the at least one projection of the at least one of the plurality of cover portions forms a pivotal axis and is received in a corresponding one of the at least one connecting hole of the primary lever, so that the at least one of the plurality of cover portions is pivotable relative to the primary lever about the at least one projection thereof.

14. The wiper blade according to claim 1, wherein the cover member has a fin arrangement, wherein the fin arrangement exerts an urging force for urging the wiper strip against the wiping surface when the fin arrangement receives a head wind.

15. The wiper blade according to claim 14, wherein:

the cover member has a top ridge, which is offset from a center line of the wiper strip in a transverse direction of the wiper blade on a first side of the center line of the wiper strip; and

the fin arrangement of the cover member extends in the transverse direction of the wiper blade from the top ridge of the cover member into a second side of the center line of the wiper strip, which is opposite from the first side.

16. The wiper blade according to claim 1, wherein:

each of the plurality of levers is made of metal; and

each of the plurality of cover portions is made of resin.

17. A vehicle wiper system comprising the wiper blade of claim 1.

18. A wiper blade comprising:

a wiper strip that directly wipes a wiping surface;

a lever assembly that holds the wiper strip and includes a connecting arrangement, which is adapted to connect with a wiper arm, wherein an axial length of the lever assembly is shorter than an axial length of the wiper strip; and

a fin member that is installed to the lever assembly and has a fin arrangement, wherein the fin arrangement exerts an urging force for urging the wiper strip against the wiping surface when the fin arrangement receives a head wind, wherein;

a first axial end part of the fin member directly and non-slidably holds an adjacent part of the wiper strip, which axially projects from an adjacent first axial end of the level assembly;

a second axial end part of the fin member, which is opposite from the first axial end part of the fin member, directly and slidably holds an adjacent part of the wiper strip, which axially projects from an adjacent second axial end of the level assembly that is opposite from the first axial end of the lever assembly;

the fin member includes a movable fin portion, which is installed to the lever assembly and is pivotable relative to the lever assembly; and

the movable fin portion axially outwardly extends away from the connecting arrangement beyond one of the first and second axial ends of the lever assembly to form one of the first and second axial end parts of the fin member.

19. The wiper blade according to claim 18, wherein:

the fin member includes a plurality of finned portions, which are formed separately from one another;

each of the plurality of finned portion has a fin section that forms a part of the fin arrangement; and

at least one of the plurality of finned portions includes a wiper strip urging part, which contacts a top surface of the wiper strip.

20. The wiper blade according to claim 18, wherein:

the fin member has a top ridge, which is offset from a center line of the wiper strip in a transverse direction of the wiper blade on a first side of the center line of the wiper strip; and

the fin arrangement of the fin member extends in the transverse direction of the wiper blade from the top ridge of the fin member into a second side of the center line of the wiper strip, which is opposite from the first side.

21. The wiper blade according to claim 20, wherein an amount of offset of the top ridge of the fin member relative to the center line of the wiper strip is increased in an axial direction of the wiper blade toward at least one of the ends of the fin member.

22. The wiper blade according to claim 21, wherein:

a height of the top ridge of the fin member, which is measured from a lower edge of the fin arrangement, is smaller than a transverse width of the fin arrangement, which is measured in the transverse direction of the wiper blade, in the at least one of the ends of the fin member; and

the height of the top ridge of the fin member is greater than the transverse width of the fin arrangement in at least one axial intermediate point of the fin member, which is located between an axial center of the fin member and the at least one of the ends of the fin member.

23. The wiper blade according to claim 20, wherein the fin member receives the lever assembly.

24. A vehicle wiper system comprising the wiper blade of claim 18.

25. The wiper blade according to claim 18, wherein:

the movable fin portion is a first movable fin portion installed to the lever assembly on a first axial side of the connecting arrangement;

the one of the first and second axial ends of the lever assembly is the first axial end of the lever assembly;

the fin member further includes a second movable fin portion, which is formed separately from the first movable fin portion;

the second movable fin portion is installed to the lever assembly on a second axial side of the connecting arrangement opposite from the first axial side of the connecting arrangement and is pivotable relative to the lever assembly;

the second movable fin portion axially outwardly extends away from the connecting arrangement beyond the second axial end of the lever assembly to form the second axial end part of the fin member.

26. The wiper blade according to claim 25, wherein:

the fin member further includes a stationary fin portion, which is fixed to the lever assembly; and

the stationary fin portion is continuously connected to and is placed between the first movable fin portion and the second movable fin portion.

27. The wiper blade according to claim 18, wherein the lever assembly further includes a plurality of levers, which are connected together in a hierarchical manner.

28. A wiper blade comprising:

a wiper strip that directly wipes a wiping surface;

a lever assembly that holds the wiper strip and includes a connecting arrangement, which is adapted to connect with a wiper arm, wherein an axial length of the lever assembly is shorter than an axial length of the wiper strip; and

a fin member that is installed to the lever assembly and has a fin arrangement, wherein the fin arrangement exerts an urging force for urging the wiper strip against the wiping surface when the fin arrangement receives a head wind, wherein;

the fin member includes a stationary fin portion and a movable fin portion, wherein the movable fin portion is pivotable relative to the stationary fin portion and is installed to the lever assembly and is pivotable relative to the lever assembly;

the movable fin portion axially outwardly extends away from the connecting arrangement beyond a corresponding axial end of the lever assembly; and

an axial end part of the movable fin portion, which is located axially outward of the corresponding axial end of the lever assembly, directly holds an adjacent part of the wiper strip, which axially projects from the corresponding axial end of the lever assembly.