JP4938495B2 - Wiper blade - Google Patents

Description

  The present invention relates to a wiper blade that swings on a windshield of a vehicle to wipe the windshield.

  2. Description of the Related Art Conventionally, a vehicle such as an automobile is provided with a wiper device for securing a driver's field of view by wiping off deposits such as rain and snow attached to a windshield and splashes of a front vehicle. Such a wiper device includes a wiper arm that is swingably driven via an electric motor, and a wiper blade that is attached to the distal end side of the wiper arm. The wiper blade is rotatable to the distal end side of the wiper arm. It has a blade holder to be mounted and a blade rubber held by the blade holder. The blade rubber is pressed against the windshield by a spring built in the wiper arm, and the blade rubber swings on the windshield by driving the wiper arm with an electric motor in this state. Exercise and wipe away.

  By the way, when the wiper blade is prevented from sticking to the windshield in cold weather or when the vehicle is washed, the user may wake up the wiper arm against the spring force. Depending on the case, the wiper blade may be gripped to raise the wiper arm, or the raised wiper arm may be tilted with the wiper blade rotating more than a predetermined angle with respect to the wiper arm.

Therefore, for example, Patent Document 1 discloses a wiper blade that makes it possible to easily raise the wiper arm by restricting the rotation of the wiper blade with respect to the wiper arm by a predetermined angle or more, and to correctly tilt the raised wiper arm. ing. The wiper blade described in Patent Document 1 is pivotably engaged with each other between a primary lever (blade holder) and a U-shaped spring member (arm mounting member) rotatably provided on the primary lever (blade holder). A restricting member (engagement protrusion and engagement hole) is provided, and the rotation restricting member prevents rotation of the wiper blade with respect to the wiper arm by a predetermined angle or more.
Japanese Utility Model Publication No. 02-129952 (FIGS. 1 and 2)

  However, according to the wiper blade described in Patent Document 1 described above, a user applies a relatively large external force to the tip side of the wiper blade to raise the wiper arm, or such an operation is repeatedly performed. As a result, a relatively large stress is concentrated on the engagement protrusion formed on the U-shaped spring member and the engagement hole formed on the primary lever. As a result, the engagement protrusion or the engagement hole breaks early, and as a result, a problem that the function as the rotation restricting member cannot be performed early may occur.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a wiper blade that can release a rotation restriction by a rotation restriction member provided between an arm attachment member and a blade holder when an external force is applied to the arm attachment member beyond a predetermined level. It is in.

A wiper blade of the present invention is a wiper blade that is mounted on a wiper arm that is swingably provided on a vehicle and that swings on a windshield to wipe the windshield, and a blade rubber that contacts the windshield; A blade holder for holding the blade rubber, an arm mounting member mounted on the wiper arm, and an arm mounting member mounted on the wiper arm. An arm supporting member that supports the wiper arm between the arm mounting member and the arm mounting member and the blade holder, and the arm mounting member rotates more than a predetermined angle with respect to the blade holder. A rotation restricting member for restricting, and the rotation restricting member is provided on the arm mounting member. It is the first engaging portion, and composed of a second engaging portion that engages the first engagement portion provided on the blade holder, and the first engaging portion and the second engaging portion with each other Engagement restricts rotation of the arm mounting member by a predetermined angle or more with respect to the blade holder, and at least one of the first engagement portion and the second engagement portion is formed to be elastically deformable. Thus, when an external force of a predetermined level or more is applied in the rotation direction of the arm mounting member, the engagement between the first engagement portion and the second engagement portion is released, and the blade holder of the arm mounting member It is characterized by allowing a rotation of a predetermined angle or more with respect to.

In the wiper blade of the present invention, the arm mounting member is provided with a rubber contact portion that contacts the blade rubber under the disengaged state of the first engagement portion and the second engagement portion. Features.

  In the wiper blade of the present invention, the rubber abutting portion is spaced from the blade rubber as it moves away from the rotation shaft under the engagement state of the first engagement portion and the second engagement portion. The gap is formed so as to be large.

According to the present invention, the rotation restriction member that restricts the rotation of the arm attachment member with respect to the blade holder by a predetermined angle or more is provided between the arm attachment member and the blade holder, and the rotation restriction member is attached to the arm attachment member. The first engaging portion is provided with a second engaging portion that is provided on the blade holder and engages with the first engaging portion, and the first engaging portion and the second engaging portion engage with each other. Thus, the rotation of the arm mounting member with respect to the blade holder by a predetermined angle or more is restricted, and at least one of the first engagement portion and the second engagement portion is formed so as to be elastically deformable . When an external force greater than or equal to a predetermined value is applied in the rotation direction, the engagement between the first engagement portion and the second engagement portion is released, and the arm attachment member is allowed to rotate more than a predetermined angle with respect to the blade holder. With respect to the rotation direction of the arm mounting member When a large external force or a constant is loaded, at least one of the first engagement portion and the second engaging portion is elastically deformed. Thereby, the engagement between the first engaging portion and the second engaging portion is released, and the arm mounting member can be allowed to rotate more than a predetermined angle with respect to the blade holder. Therefore, damage to the rotation restricting member can be suppressed, and the rotation restricting function can be maintained for a long time.

According to the present invention, the arm mounting member is provided with the rubber contact portion that contacts the blade rubber under the disengaged state of the first engagement portion and the second engagement portion. After the rotation with respect to the holder is allowed, the rubber contact portion can be brought into contact with the blade rubber. Thereby, it can suppress that an arm mounting member rotates excessively with respect to a blade holder. Further, since the blade rubber functions as a cushioning material, the rubber contact portion can be protected from impact.

  According to the present invention, the gap between the rubber contact portion and the blade rubber increases as the rubber contact portion moves away from the rotation shaft under the engagement state of the first engagement portion and the second engagement portion. Therefore, after the rotation of the arm mounting member with respect to the blade holder is allowed, the area of the portion where the rubber contact portion and the blade rubber contact can be increased. As a result, the stress acting when the arm mounting member is allowed to rotate with respect to the blade holder can be distributed to the blade rubber.

  Hereinafter, a first embodiment of a wiper blade according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory view for explaining a wiper device mounted on a vehicle, FIG. 2 is an enlarged view showing the wiper blade of FIG. 1, FIG. 3 is a perspective view showing an arm mounting member, and FIG. 5 is a perspective view showing the support member, FIG. 5 is a sectional view taken along line AA in FIG. 2, FIG. 6 is a sectional view taken along line BB in FIG. 2, and FIG. FIG. 8 is an enlarged cross-sectional view of a broken-line circle D portion of FIG.

  As shown in FIG. 1, a vehicle 10 has a wiper device for wiping off deposits such as rain and snow adhering to a windshield 11 serving as a windshield and splashes of a front vehicle to ensure the driver's view. 12 is mounted.

  The wiper device 12 includes a wiper motor 13 that is rotationally driven by operating a wiper switch (not shown) provided in a vehicle or the like, and a driver seat side and a passenger seat side wiper shaft 14a that are rotatably provided in the vehicle 10. 14b, the wiper shafts 14a and 14b are fixed to the wiper shafts 14a and 14b, and the front and rear wiper arms 15a and 15b are oscillating on the windshield 11. And a link mechanism 16 for converting into a swinging motion of 15b.

  Driver-side and passenger-side wiper blades 17a and 17b, which are formed in the same manner, are mounted on the front end sides of the wiper arms 15a and 15b so as to be rotatable with respect to the vertical direction of the windshield 11, respectively. The blades 17a and 17b are in elastic contact with the windshield 11 by springs (not shown) built in the wiper arms 15a and 15b. Then, by rotating the wiper motor 13, the wiping ranges 18a and 18b indicated by the two-dot chain line in the drawing on the windshield 11, that is, between the lower inversion position (wiper arm stop position) and the upper inversion position, The wiper blades 17a and 17b are in sliding contact.

  FIG. 2 shows a driver-side wiper blade. The driver-side wiper blade and the passenger-side wiper blade have the same configuration, so only the driver-side wiper blade will be described below. In the description of the wiper blade on the driver's seat, the suffix “swivel blade” etc. is not attached to the component parts but simply referred to as “wiper blade” etc. “A, b” is omitted.

  As shown in FIG. 2, the wiper blade 17 includes a blade holder 20, an arm attachment member 30 that is rotatably attached to a substantially central portion in the longitudinal direction of the blade holder 20, and a rotatably attachment to the arm attachment member 30. And an arm support member 40 that supports the distal end side of the wiper arm 15 with the arm mounting member 30.

  As shown in FIG. 3, the arm mounting member 30 includes a main body portion 31 covered by the distal end side of the wiper arm 15 and arm portions 32 a and 32 b formed integrally with the main body portion 31 and paired in the vertical direction in the figure. And have. The main body 31 has a concave groove 33 that is rotatably mounted on a rotating shaft 21 (broken line in the figure) having stoppers such as serrations provided at both ends thereof at a substantially central portion in the longitudinal direction of the blade holder 20. A pair of pins 34a and 34b to which the arm support member 40 is rotatably attached are integrally formed toward the inner side at the distal end side (left side in the figure) of the arm portions 32a and 32b. Is formed.

  Each arm portion 32a, 32b is formed so that the thickness dimension in the vertical direction in the figure gradually decreases as it moves away from the concave groove 33 attached to the rotary shaft 21, that is, from the rotary shaft 21 in the figure. The gap S between the blade rubber 50 (broken line in the figure) increases as it moves away from the left side, and the blade rubber 50 is formed on the lower end side of each arm 32a, 32b in the figure. Rubber abutting portions 35a and 35b that can abut on the back side (upper side in the figure) of the knives are formed.

  As shown in FIGS. 3 and 8, an arm side engaging projection (first engaging portion) 36 as a rotation restricting member in the present invention is integrally formed on the main body portion 31 of the arm mounting member 30. The arm-side engagement protrusion 36 is adapted to engage with the holder-side engagement protrusion 20a of the blade holder 20. As described above, the arm-side engagement protrusion 36 and the holder-side engagement protrusion 20a engage with each other to restrict the rotation of the arm mounting member 30 with respect to the blade holder 20 by a predetermined angle or more.

  As shown in FIG. 8, the arm side engaging projection 36 has a leg portion 36a and a head portion 36b provided integrally with the distal end side thereof, and a head portion on the distal end side away from the proximal end side of the leg portion 36a. A portion 36b is provided. Thereby, the rigidity of the arm side engaging protrusion 36 is lowered to make the arm side engaging protrusion 36 bend easily from the base end side. Therefore, the arm side engaging protrusion 36 is formed to be elastically deformable.

  As shown in FIG. 4, the arm support member 40 is mounted on a mounting cylinder portion 41 that is rotatably mounted on pins 34 a and 34 b (broken lines in the drawing) formed on the arm portions 32 a and 32 b of the arm mounting member 30. And a main body 42 formed integrally with the mounting cylinder 41 and a support 43 formed integrally with the main body 42 and elastically deformable in the left-right direction in the figure. And the support part 43 is formed thinly compared with the main-body part 42, and, thereby, the support part 43 is elastically deformed toward the left-right direction in the figure.

  The blade holder 20 is formed in a substantially hollow shape as shown in FIGS. 5 and 6, and a blade rubber 50 is held inside the blade holder 20. A pair of guide projections 21a and 21b are integrally formed in the longitudinal direction inside the blade holder 20 so as to face each other, and each guide projection 21a and 21b is attached to the blade holder 20 of the blade rubber 50. Is to guide you.

  A pair of holding claws 22a and 22b projecting inward from the guide protrusions 21a and 21b are formed on the inner side of the guide protrusions 21a and 21b and corresponding to the line BB in FIG. The retaining claws 22a and 22b prevent the blade rubber 50 from coming off from the blade holder 20. Each of the holding claws 22a and 22b is provided in a portion corresponding to the line BB in FIG. 2, and is also provided in a portion on the opposite side centered on the line AA. The blade rubber 50 is supported at two points by the blade holder 20.

  As shown in FIG. 6, contact protrusions 23 that contact the back side of the blade rubber 50 are integrally formed on the portions corresponding to the holding claws 22a and 22b of the blade holder 20, and thus contact with each other. The protrusion 23 abuts on the back side of the blade rubber 50, so that excessive inclination of the blade rubber 50 with respect to the blade holder 20 during wiping is suppressed.

  A pair of covers 24 are attached to the left and right sides of the blade holder 20 in FIG. 2 so as to cover the blade rubber 50, and claw portions 24 a formed integrally with the respective covers 24 are disposed inside the blade holder 20. Each cover 24 is prevented from coming off from the blade holder 20 by being fitted into the formed contact protrusion 23. As shown in FIG. 6, a steel core 24b is inserted into the claw portion 24a of the cover 24 by insert molding or the like, thereby giving the claw portion 24a flexibility and repeated elastic deformation. Improves durability.

  The blade holder 20 and each cover 24 are integrally formed with fins 25 along the longitudinal direction of the blade holder 20, and the fins 25 generate traveling wind when the vehicle 10 travels at a high speed or the like. By receiving, the blade rubber 50 is prevented from being lifted from the windshield 11, and the wiping performance of the wiper blade 17 is prevented from being lowered.

  The blade rubber 50 is formed by using a material such as natural rubber or chloroprene rubber and pouring the molten material into a mold. As shown in FIGS. 5 and 6, the blade rubber 50 has a main body 52 on which a pair of vertebras 51 as plate springs made of steel are mounted. Each vertebra 51 is formed in an arc shape so as to bend with a radius of curvature smaller than the radius of curvature of the windshield 11, whereby the pressing force against the windshield 11 in the entire longitudinal direction of the blade rubber 50 is made substantially uniform. It is trying to become.

  On the lower side of the main body portion 52 of the blade rubber 50 in the figure, a body portion 53 is formed integrally with the guide projections 21a and 21b of the blade holder 20 and the holding claws 22a and 22b. A lip portion 54 that contacts the windshield 11 is integrally formed on the lower side of the body portion 53 in the drawing, and the lip portion 54 and the body portion 53 are the windshield of the lip portion 54 at the time of wiping. 11 are connected to each other by a neck portion 55 for smoothly performing a tilting operation (reversing operation) with respect to 11.

  As shown in FIG. 7, the wiper blade 17 employs a so-called U-hook connection method in which the wiper blade 17 is connected to a U-shaped portion 19 formed on the distal end side of the wiper arm 15 via an arm mounting member 30. Yes. The inner side of the U-shaped portion 19 of the wiper arm 15 is in contact with the arm mounting member 30 so as to cover the main body portion 31 of the arm mounting member 30 from the vertical direction in the figure, and the outer side of the U-shaped portion 19 is the arm It is in contact with the support portion 43 of the support member 40. In this way, the U-shaped portion 19 of the wiper arm 15 is sandwiched between the arm mounting member 30 and the arm support member 40, that is, the U-shaped portion 19 is supported by the elastic force of the support portion 43, thereby providing a wiper blade. 17 is attached to the wiper arm 15.

  Here, when removing the wiper blade 17 from the wiper arm 15, as shown by the broken line in FIG. 7, the arm support member 40 is rotated to stand up about the central axis C <b> 1 (the pins 34 a and 34 b). The wiper blade 17 can be detached from the wiper arm 15 by releasing the elastic force applied to the U-shaped portion 19 by the support portion 43 and sliding the wiper blade 17 with respect to the wiper arm 15.

  As shown in FIG. 8, the blade holder 20 has a holder side engaging projection (second engaging portion) as a rotation restricting member that engages with the arm side engaging projection 36 in the main body 31 of the arm mounting member 30. 20a is integrally formed. The holder-side engagement protrusion 20a is formed such that the protrusion height from the blade holder 20 is substantially the same as the protrusion height of the head portion 36b in the arm-side engagement protrusion 36. The holder-side engagement protrusion 20a does not have a leg portion like the arm-side engagement protrusion 36, so that the rigidity of the holder-side engagement protrusion 20a is relatively high. That is, the arm-side engagement protrusion 36 is formed so as to be elastically deformable, and the holder-side engagement protrusion 20a is formed so as not to be elastically deformable.

  Next, the operation of the wiper blade 17 according to the first embodiment configured as described above will be described with reference to the drawings. 9A and 9B are explanatory views for explaining the operation of the wiper blade, and FIG. 10 is a partial cross-sectional view showing a contact state between the rubber contact portion and the blade rubber.

  FIG. 9A shows an engaged state in which the arm side engaging protrusion 36 and the holder side engaging protrusion 20a are engaged with each other. In this case, the arm mounting member 30 has a predetermined angle or more with respect to the blade holder 20. The rotation is restricted. Therefore, when a user or the like grips the distal end side (the left side in the figure) of the wiper blade 17 and lifts it with a relatively small external force F1 as indicated by a broken line arrow in the figure, the arm side engaging projection 36 and the holder side The state of engagement with the engagement protrusion 20a is maintained, and the wiper arm 15 can be raised. Further, when the wiper arm 15 is lowered from the raised state, the arm mounting member 30 is restricted from rotating with respect to the blade holder 20 so that the blade rubber 50 can be reliably opposed to the windshield 11. It has become.

On the other hand, when the user or the like grips the tip end side of the wiper blade 17 as shown by the thick line arrow in the figure, and lifts up vigorously so that the external force F2 (F2> F1) is larger than the external force F1 described above. The wiper blade 17 is rotated clockwise with respect to the wiper arm 15 around the rotation shaft 21 (center axis C2) of the blade holder 20. Then, a force F acts on the arm-side engagement protrusion 36 from the holder-side engagement protrusion 20a in the direction of the arrow in the broken-line circle in the drawing, whereby the arm-side engagement protrusion 36 is elastically deformed.

  When the arm side engagement protrusion 36 is elastically deformed, as shown in FIG. 9B, the head side 36b gets over the holder side engagement protrusion 20a along with the elastic deformation of the arm side engagement protrusion 36, and the arm side The engagement between the engagement protrusion 36 and the holder-side engagement protrusion 20a is released, that is, the engagement is released. As a result, the arm mounting member 30 is allowed to rotate more than a predetermined angle with respect to the blade holder 20, and then, as shown in FIG. 10, rubber contact portions 35a, 35b in the arm portions 32a, 32b of the arm mounting member 30. Abuts against the back side of the blade rubber 50, and excessive rotation of the arm mounting member 30 relative to the blade holder 20 is suppressed. At this time, the impact transmitted to the rubber contact portions 35a and 35b is reduced by the function of the blade rubber 50 as a buffer material.

  Further, as shown in FIG. 10, the entire rubber contact portions 35 a and 35 b, that is, the entire rubber contact portions 35 a and 35 b in the horizontal direction in the drawing come into contact with the back side of the blade rubber 50. The stress acting when the arm mounting member 30 is allowed to rotate with respect to the blade holder 20 is dispersed along the longitudinal direction of the blade rubber 50 to relieve stress concentration on a part of the blade rubber 50. .

  From the disengaged state in which the arm-side engaging protrusion 36 and the holder-side engaging protrusion 20a are disengaged, the arm-side engaging protrusion 36 and the holder-side engaging protrusion 20a are engaged (see FIG. 9 (a)), when the wiper arm 15 is gripped and lifted as shown in FIG. 10, the wiper blade 17 has a predetermined direction in the direction of the thick arrow in the figure. Is applied with an external force F2 of the size (external force equivalent to the external force F2).

As a result, the wiper blade 17 rotates counterclockwise with respect to the wiper arm 15 around the rotation shaft 21 (center axis C2) of the blade holder 20, and the arm-side engagement protrusion 36 is elastically deformed. The head 36b gets over the holder-side engagement protrusion 20a. In this way, the arm-side engagement protrusion 36 and the holder-side engagement protrusion 20a can be returned to the engaged state.

  As described above in detail, according to the wiper blade 17 according to the first embodiment, the arm mounting member 30 rotates between the arm mounting member 30 and the blade holder 20 by a predetermined angle or more with respect to the blade holder 20. A rotation restricting member for restriction is provided, and the arm side engaging protrusion 36 of the arm side engaging protrusion 36 and the holder side engaging protrusion 20a constituting the rotation restricting member is formed so as to be elastically deformable. The arm-side engagement protrusion 36 can be elastically deformed when a large external force greater than a predetermined value is applied to the rotation direction of the member 30. As a result, the engagement between the arm-side engagement protrusion 36 and the holder-side engagement protrusion 20a is released, and the arm mounting member 30 can be allowed to rotate more than a predetermined angle with respect to the blade holder 20. Therefore, damage to the rotation restricting member can be suppressed, and the rotation restricting function can be maintained for a long time.

Further, according to the wiper blade 17 according to the first embodiment, the arm-side engagement protrusion 36 and the holder-side engagement protrusion 20a are disengaged from the arm portions 32a and 32b of the arm mounting member 30. Thus, since the rubber contact portions 35a and 35b that contact the blade rubber 50 are provided, the rubber contact portions 35a and 35b can be moved to the blade rubber 50 after the arm mounting member 30 is allowed to rotate with respect to the blade holder 20. It can be made to contact. Thereby, it is possible to suppress the arm mounting member 30 from excessively rotating with respect to the blade holder 20. Further, since the blade rubber 50 functions as a cushioning material, the rubber contact portions 35a and 35b can be protected from impact.

  Furthermore, according to the wiper blade 17 according to the first embodiment, the rubber contact portions 35a and 35b rotate under the engagement state of the arm side engagement protrusion 36 and the holder side engagement protrusion 20a. Since the gap between the blade rubber 50 and the blade rubber 50 increases as the distance from the shaft 21 increases, the rubber contact portions 35a and 35b and the blades are allowed to rotate after the arm mounting member 30 is allowed to rotate relative to the blade holder 20. The area of the portion where the rubber 50 abuts can be increased. Thereby, the stress acting when the arm mounting member 30 is allowed to rotate with respect to the blade holder 20 can be dispersed along the longitudinal direction of the blade rubber 50, and deterioration due to stress concentration of the blade rubber 50 can be suppressed.

  Next, a second embodiment of the wiper blade according to the present invention will be described with reference to the drawings. FIG. 11 is an enlarged cross-sectional view showing the main part of the wiper blade according to the second embodiment. In addition, about the part which has the same function as 1st Embodiment mentioned above, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 11, an arm side engagement protrusion (first engagement portion) 60 as a rotation restricting member is integrally formed on the main body portion 31 of the arm mounting member 30. The protrusion 60 omits the leg portion 36a shown in FIG. 8 as compared to the first embodiment described above. Further, the blade holder 20 is integrally formed with a holder side engaging projection (second engaging portion) 61 as a rotation restricting member, and the holder side engaging projection 61 includes a leg portion 61a and its tip. And a head 61b integrally formed on the side (left side in the figure).

  In this way, by forming the arm side engaging protrusion 60 and the holder side engaging protrusion 61, the arm side engaging protrusion 36 and the holder side engaging protrusion 20a (see FIG. 8) in the first embodiment described above. On the contrary, the arm-side engagement protrusion 60 is formed so as not to be elastically deformable, and the holder-side engagement protrusion 61 is formed to be elastically deformable (see the bold arrow in FIG. 11). Therefore, also in the wiper blade 17 according to the second embodiment, the same operational effects as those of the above-described first embodiment can be obtained.

  It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, in each of the above embodiments, one of the arm-side engagement protrusion and the holder-side engagement protrusion is formed so as to be elastically deformable, but the present invention is not limited to this, and the arm side You may make it form both an engagement protrusion and a holder side engagement protrusion so that elastic deformation is possible. At this time, the arm-side engaging protrusion and the holder-side engaging protrusion are released so that the engagement state between the arm-side engaging protrusion and the holder-side engaging protrusion can be released by a predetermined external force (for example, the external force F2 shown in FIG. 9A). The flexibility of the engaging protrusion is set.

Further, in each of the above-described embodiments, the rubber contact portions 35a and 35b in the arm portions 32a and 32b of the arm mounting member 30 are in the engaged state of the arm-side engagement projection 36 and the holder-side engagement projection 20a. Originally, the gap between the blade rubber 50 and the blade rubber 50 is increased as the distance from the rotary shaft 21 increases, and the area of the portion where the rubber contact portions 35a and 35b contact the blade rubber 50 is increased. However, the present invention is not limited to this, and a rubber contact portion having a small contact area is formed on each arm portion 32a, 32b of the arm mounting member 30 so as to partially contact the blade rubber 50. May be.

  Further, in each of the above embodiments, the wiper blade is applied to a wiper device that wipes the windshield as a windshield. However, the present invention is not limited to this, and the rear glass as a windshield is wiped. It can also be applied to a wiper device.

It is explanatory drawing explaining the wiper apparatus with which the vehicle was mounted | worn. FIG. 2 is an enlarged view showing the wiper blade of FIG. 1 in an enlarged manner. It is a perspective view which shows an arm mounting member. It is a perspective view which shows an arm support member. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is a fragmentary sectional view which follows the CC line of FIG. It is an expanded sectional view of the broken-line circle D part of FIG. (A), (b) is explanatory drawing explaining operation | movement of a wiper blade. It is a fragmentary sectional view which shows the contact state of a rubber contact part and a blade rubber. It is an expanded sectional view showing the important section of the wiper blade concerning a 2nd embodiment.

Explanation of symbols

10 Vehicle 11 Windshield (windshield)
DESCRIPTION OF SYMBOLS 12 Wiper apparatus 13 Wiper motor 14a Driver side wiper shaft 14b Passenger side wiper shaft 15 Wiper arm 15a Driver side wiper arm 15b Passenger side wiper arm 16 Link mechanism 17 Wiper blade 17a Driver side wiper blade 17b Passenger side wiper blade 18a 18b Wiping range 19 U-shaped portion 20 Blade holder 20a Holder-side engagement protrusion (rotation restricting member, second engagement portion)
21 Rotating shafts 21a, 21b Guide protrusions 22a, 22b Holding claws 23 Abutting protrusions 24 Covers 24a Claw parts 24b Metal cores 25 Fins 30 Arm mounting members 31 Body parts 32a, 32b Arm parts 33 Grooves 34a, 34b Pins 35a, 35b Rubber contact portion 36 Arm side engagement protrusion (rotation restricting member, first engagement portion)
36a Leg part 36b Head part 40 Arm support member 41 Mounting cylinder part 42 Main body part 43 Support part 50 Blade rubber 51 Vertibra 52 Main body part 53 Body part 54 Lip part 55 Neck part 60 Arm side engagement protrusion (rotation restriction member, first 1 engaging part)
61 Holder-side engagement protrusion (rotation restricting member, second engagement portion)
61a Leg 61b Head S Clearance

Claims (3)

A wiper blade that is mounted on a wiper arm that is swingably provided on a vehicle and that swings on a windshield to wipe the windshield,
A blade rubber in contact with the windshield;
A blade holder for holding the blade rubber;
An arm mounting member that is rotatably mounted on a rotation shaft provided in the blade holder and is mounted on the wiper arm;
An arm support member rotatably mounted on the arm mounting member and supporting the wiper arm with the arm mounting member;
A rotation restricting member that is provided between the arm attachment member and the blade holder and restricts rotation of the arm attachment member by a predetermined angle or more with respect to the blade holder;
Wherein the rotation restricting member, and a first engaging portion provided in the arm mounting member, and composed of a second engaging portion that engages the first engagement portion provided on the blade holder, the first The engagement portion and the second engagement portion engage with each other to restrict rotation of the arm mounting member with respect to the blade holder by a predetermined angle or more, and the first engagement portion and the second engagement portion By forming at least one of them so as to be elastically deformable , when an external force greater than or equal to a predetermined value is applied in the rotation direction of the arm mounting member, the first engagement portion and the second engagement portion The wiper blade is characterized in that the engagement is released and the arm mounting member is allowed to rotate more than a predetermined angle with respect to the blade holder.   2. The wiper blade according to claim 1, wherein the arm mounting member is provided with a rubber contact portion that contacts the blade rubber in a disengaged state of the first engagement portion and the second engagement portion. A wiper blade characterized by that. 3. The wiper blade according to claim 2, wherein the rubber abutment portion is separated from the blade rubber as the distance from the rotation shaft increases with the first engagement portion and the second engagement portion engaged. A wiper blade formed so that a gap between the two becomes large.

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