Wiper arm

Abstract

To improve the quality of a wiper arm.SOLUTION: A wiper arm 11 comprises an arm head 13, a cover 17, and an arm body 14, wherein the cover 17 has a top wall and wall parts 17a, 17b, the top wall comprises a fastening part extended toward the arm head 13, and the wall parts 17a, 17b comprise a projection 17e extended toward the arm head 13. The arm body 14 comprises a coupling part 14d connectable with the arm head 13, and the arm head 13 is covered with the cover 17 in a state that the arm body 14 is coupled to the arm head 13 by means of the coupling part 14d. Engagement of a part of the fastening part with the arm head 13 makes the other part of the fastening part come in contact with the coupling part 14d, and the projection 17e come in contact with the arm head 13.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a wiper arm provided in a wiper device for wiping a wiping surface.

Background Art

[0002] Vehicles such as automobiles are equipped with wiper devices. The wiper device includes an arm body, an arm head, and a head cover, and has a wiper arm that is swung by driving a wiper motor, and a wiper blade that is attached to the wiper arm and wipes a wiping surface.

[0003] As an example of the wiper arm provided in the above wiper device, Patent Document 1 discloses a wiper arm in which an arm body is rotatably connected to an arm head.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a wiper arm having an arm body, an arm head connected to the arm body, and a head cover covering the arm head, the arm body and the arm head are each formed of resin.

[0006] Therefore, depending on the molding accuracy and molding state, play is likely to occur at the connecting portion between the arm body and the arm head.

[0007] Therefore, due to the play at the connecting portion, the parts interfere with each other and a sound (rattling sound) different from normal is generated.

[0008] Also, during the driving of the wiper arm, in addition to the rattling between the arm main body and the arm head at the connecting portion, the vibration from the wiper motor is propagated to the connecting portion and then propagated to the wiper blade attached to the arm main body via the arm main body, which becomes one of the causes of the vibration (chatter) generated in the wiper blade.

[0009] The abnormal sound (rattling sound) different from the normal due to the rattling, and the chatter caused by the propagation of the rattling and the vibration from the wiper motor may give discomfort to the user and deteriorate the quality of the wiper arm.

[0010] Although it is conceivable to suppress the rattling at the connecting portion by the head cover, since the vibration from the wiper motor is also propagated to the head cover, it is not easy to suppress the rattling at the connecting portion by the head cover.

[0011] The above Patent Document 1 describes that the head cover is attached to the arm head, but there is no description about the countermeasure for the rattling at the connecting portion by the head cover.

[0012] An object of the present invention is to provide a wiper arm with improved quality.

Means for Solving the Problems

[0013] One aspect of the present invention is a wiper arm including an arm head, a cover covering the arm head, and an arm body rotatably connected to the arm head. The cover has a top wall and wall portions connected to the top wall and facing each other. The top wall includes a fastening portion extending toward the arm head side in the height direction of the cover. The wall portions include protruding portions extending toward the arm head side in the width direction of the cover. The arm body includes a connecting portion connectable to the arm head. The arm head is covered by the cover in a state where the arm body and the arm head are connected by the connecting portion. A part of the fastening portion engages with the arm head so that the other part of the fastening portion abuts against the connecting portion, and the protruding portion abuts against the arm head.

[0014] In another aspect of the present invention, the arm head has a receiving portion capable of receiving a part of the fastening portion.

[0015] In another aspect of the present invention, the arm body includes arm wall portions arranged to face each other. The connecting portion extends along the width direction of the arm body and includes a shaft portion connecting the opposing arm wall portions. A part of the fastening portion engages with the arm head so that the other part of the fastening portion abuts against the shaft portion.

[0016] In another aspect of the present invention, the arm head has a convex portion provided on a side surface of the arm head. The protruding portion includes a groove portion fitted to the convex portion and a hollow portion provided outside the groove portion in the width direction of the cover.

Advantages of the Invention

[0017] According to the present invention, the quality of the wiper arm can be improved.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0020] The wiper device 10 shown in FIGS. 1 to 3 is, for example, a device for wiping a wiping surface such as a rear glass provided on a vehicle such as an automobile. The wiper device 10 has a wiper arm 11 having an arm body 14, a support portion 12 attached to the tip side of the arm body 14, and a wiper blade 15 attached to the support portion 12 and having a blade rubber 16 for wiping the above-mentioned wiping surface. Note that the wiper blade 15 is rotatably supported by the support portion 12.

[0021] Further, as shown in FIG. 2, the wiper arm 11 includes an arm body 14, an arm head 13 that rotatably supports the arm body 14, and a cover 17 that covers the arm head 13. That is, the arm body 14 is rotatably connected to the arm head 13.

[0022] On the proximal end side (opposite to the distal end side) of the wiper arm 11, as shown in FIG. 3, a fixing portion 13g to which the output shaft of a wiper motor (not shown) for driving the wiper device 10 is fixed is provided. Specifically, the output shaft of the wiper motor is fixed to a metal fixing member 20 embedded in the fixing portion 13g of the arm head 13.

[0023] Then, by turning on the wiper switch provided in the vehicle interior or the like, the output shaft of the wiper motor rotates in the forward and reverse directions, and the wiper arm 11 swings. As a result, the blade rubber 16 attached to the wiper blade 15 shown in FIG. 1 reciprocates within a predetermined wiping range on the wiping surface such as the rear glass. As a result, rainwater or the like adhering to the wiping surface such as the rear glass is wiped off.

[0024] A pressing force acts on the arm body 14 of the wiper arm 11 in a direction to tilt the arm body 14 toward the wiping surface such as the rear glass. Therefore, the wiper blade 15 does not fall off during the reciprocating wiping operation. The pressing force is generated by the spring force of a tension spring 19 provided on the proximal end side of the arm body 14 shown in FIG. 3.

[0025] In the wiper arm 11 of the present embodiment, as shown in FIGS. 1 to 4, the arm body 14 is rotatably attached to the distal end portion of the arm head 13. And a cover 17 that covers the arm head 13 is provided outside the arm head 13. The cover 17 is provided so as not to impair the design of the wiper arm 11, and has an outer appearance shape that matches the outer appearance shape of the arm body 14.

[0026] Here, the schematic shapes of the respective main components constituting the wiper arm 11 will be described.

[0027] The arm body 14 is, for example, a slender member formed of resin and extending along the longitudinal direction L1. The arm body 14 includes a wall portion 14a and a wall portion 14b which are arm wall portions arranged to face each other, and also includes a top wall 14c connected to the wall portion 14a and the wall portion 14b. That is, the shape of the cross-section in the direction orthogonal to the longitudinal direction L1 of the arm body 14 is U-shaped, and one end of the spring 19 is attached inside the arm body 14. The other end of the spring 19 is attached to the arm head 13.

[0028] Also, as shown in FIGS. 4 and 5, the arm body 14 includes a connecting portion 14d connectable to the arm head 13. This connecting portion 14d extends along the width direction H1 of the arm body 14 and includes a shaft portion 14e connecting the opposing wall portion 14a and the wall portion 14b. That is, the arm body 14 is rotatably connected to the arm head 13 at the shaft portion 14e included in the connecting portion 14d of the arm body 14.

[0029] The arm head 13 is, for example, a slender box-shaped member formed of resin and extending along the longitudinal direction L1 as shown in FIGS. 6 and 7. The arm head 13 has a side surface 13a arranged on one side in the width direction H1, a side surface 13b arranged on the other side opposite to the side surface 13a, and a top surface 13c connected to the upper ends of the side surface 13a and the side surface 13b, respectively.

[0030] Also, the arm head 13 has a connecting groove 13h, and is connected to the shaft portion 14e of the connecting portion 14d of the arm body 14 by the connecting groove 13h.

[0031] The cover 17 is formed of, for example, resin and is formed in a kamaboko shape (or U shape) so as to cover the arm head 13 as shown in FIGS. 8 to 10. Specifically, the cover 17 has a wall portion 17a disposed on one side in the width direction H1, a wall portion 17b disposed on the other side in the width direction H1 and facing the wall portion 17a, and a top wall 17c connected to the upper ends of the wall portion 17a and the wall portion 17b, respectively. The kamaboko shape is formed by the wall portion 17a, the wall portion 17b, and the top wall 17c. Thus, in a state where the cover 17 covers the arm head 13, the wall portion 17a of the cover 17 covers the side surface 13a of the arm head 13, and the wall portion 17b of the cover 17 covers the side surface 13b of the arm head 13.

[0032] Further, as shown in FIG. 11, the cover 17 is rotatably attached to the arm head 13 on the proximal end side of the arm head 13. Since the cover 17 is rotatably attached, when the wiper device 10 is assembled to an automobile, bolts (not shown) can be fastened with the cover 17 in an open state. Thereby, it becomes possible to fix the arm head 13.

[0033] As shown in FIGS. 6 and 7, convex portions 13f are provided on the side surfaces 13a and 13b on the proximal end side of the arm head 13, respectively.

[0034] On the other hand, as shown in FIG. 10, protruding portions 17e protruding inward are provided on the inner walls of the wall portion 17a and the wall portion 17b on the proximal end side of the cover 17, respectively. Further, an elongated groove portion 17h is formed along the inner wall in the protruding portion 17e. The convex portions 13f on the side surfaces 13a and 13b of the arm head 13 are fitted into the groove portions 17h provided in the protruding portions 17e on the inner walls of the wall portion 17a and the wall portion 17b of the cover 17, respectively. Thereby, the cover 17 is rotatable about the convex portion 13f of the arm head 13 as a rotation axis.

[0035] Next, the connecting portion 14d where the arm main body 14 and the arm head 13 shown in FIG. 5 are connected will be described in detail. The connecting portion 14d of the arm main body 14 includes a shaft portion 14e that connects the wall portion 14a and the wall portion 14b. That is, the shaft portion 14e of the arm main body 14 is engaged with the semi-circular connecting groove 13h of the arm head 13, whereby the connecting portion 14d is formed. The shaft portion 14e is rotatably engaged with the connecting groove 13h. Therefore, the arm main body 14 is rotatably connected to the arm head 13 at the connecting portion 14d.

[0036] Note that the cross-sectional shape of the shaft portion 14e in a direction orthogonal to the extending direction of the shaft portion 14e is composed of an arc-shaped portion 14f and a flat portion 14g. At this time, regarding the cross-sectional shape of the shaft portion 14e and the shape of the semi-circular connecting groove 13h of the arm head 13, if the axial diameter length D1 of the flat portion 14g, the axial diameter length D3 of the arc-shaped portion 14f, and the length D2 of the entrance of the connecting groove 13h are considered, then D1 < D2 < D3.

[0037] Thereby, when connecting the arm main body 14 and the arm head 13, or when releasing the connection between the arm main body 14 and the arm head 13, the attachment and detachment of the arm main body 14 with respect to the arm head 13 are possible only at the position where the axial diameter length D1 of the flat portion 14g overlaps with the length D2 of the entrance of the connecting groove 13h at the rotational position of the shaft portion 14e.

[0038] On the other hand, at the rotational position of the shaft portion 14e, at the position where the axial diameter length D1 of the flat portion 14g does not overlap with the length D2 of the entrance of the connecting groove 13h, that is, at the position where the axial diameter length D3 of the arc-shaped portion 14f overlaps with the length D2 of the entrance of the connecting groove 13h, since the shaft portion 14e does not come out of the connecting groove 13h, the arm main body 14 can rotate with respect to the arm head 13.

[0039] Next, the detailed structures of the cover 17 and the arm head 13 of the present embodiment will be described. As shown in FIGS. 8 to 10, the top wall 17c of the cover 17 is provided with a fastening portion 17d that extends toward the arm head 13 side in the height direction T1 of the cover 17. Further, the wall portions 17a and 17b of the cover 17 are provided with protruding portions 17e that extend toward the arm head 13 side in the width direction H1 of the cover 17.

[0040] Specifically, as shown in FIG. 8, on the inner wall of the top wall 17c of the cover 17, a fixing claw 17f and a protruding portion 17g that protrude downward in the height direction T1 of the cover 17 are provided. That is, the fastening portion 17d of the cover 17 is a portion that protrudes downward in the height direction T1 of the cover 17 at a position on the tip side opposite to the base end portion of the inner wall of the cover 17, and is composed of the fixing claw (a part) 17f and the protruding portion (the other part) 17g.

[0041] The fixing claw 17f further extends and protrudes downward from the protruding portion 17g. The protruding portion 17g extends along the inner wall of the top wall 17c and is formed in a U shape in a plan view of the inner wall of the top wall 17c, as shown in FIGS. 9 and 10.

[0042] Also, the protruding portion 17e of the cover 17 is a portion that protrudes inward from each of the wall portions 17a and 17b of the cover 17 at the base end portion of the cover 17. That is, the protruding portion 17e is a portion that protrudes inward from the inner walls of the wall portions 17a and 17b of the cover 17 at the base end portion of the cover 17.

[0043] The protruding portion 17e is formed in an elongated box shape on the inner walls of the wall portions 17a and 17b, respectively.

[0044] Further, as shown in FIGS. 6 and 7, the arm head 13 has a receiving portion 13d that can accommodate a part of the fastening portion 17d of the cover 17 shown in FIG. 8. Specifically, the arm head 13 has a receiving portion 13d recessed in the top surface 13c on the side opposite to the base end portion (tip side), and this receiving portion 13d can accommodate a fixing claw 17f that is a part of the fastening portion 17d of the cover 17.

[0045] Note that the receiving portion 13d is provided with an engaging portion 13e that closes a part of the concave receiving portion 13d. When the fixing claw 17f of the fastening portion 17d of the cover 17 is received in the receiving portion 13d of the arm head 13, the fixing claw 17f is caught by the engaging portion 13e, so that the fixing claw 17f is not easily detached from the engaging portion 13e.

[0046] Also, as shown in FIG. 5, the protruding portion (other portion) 17g of the fastening portion 17d of the cover 17 abuts on the shaft portion 14e of the arm main body 14 at the connecting portion 14d of the arm main body 14. In other words, the fastening portion 17d provided on the top wall 17c of the cover 17 abuts on the shaft portion 14e of the arm main body 14.

[0047] That is, in the wiper arm 11 of the present embodiment, the arm head 13 is covered by the cover 17 in a state where the arm main body 14 and the arm head 13 are connected at the connecting portion 14d. In this state, the fastening portion 17d abuts on the connecting portion 14d by engaging with the arm head 13, and the protruding portion 17e abuts on the arm head 13.

[0048] Specifically, in a state where the shaft portion 14e of the arm main body 14 is connected to the connecting groove 13h of the arm head 13 at the connecting portion 14d, the arm head 13 is covered by the cover 17. In this state, the fixing claw 17f of the fastening portion 17d of the cover 17 is received in the receiving portion 13d of the arm head 13 and engages with the engaging portion 13e. Further, at the connecting portion 14d, the protruding portion 17g of the cover 17 abuts on the shaft portion 14e of the arm main body 14. In other words, the shaft portion 14e of the arm main body 14 is abutted by the protruding portion 17g of the cover 17 and is pressed from above.

[0049] Further, in a state where the arm head 13 is covered by the cover 17, the protruding portions 17e provided on the inner walls of the wall portion 17a and the wall portion 17b of the cover 17 abut against the arm head 13. Specifically, in a state where the arm head 13 is covered by the cover 17, the protruding portion 17e provided on the inner wall of the wall portion 17a of the cover 17 abuts against the side surface 13a of the arm head 13, and the protruding portion 17e provided on the inner wall of the wall portion 17b of the cover 17 abuts against the side surface 13b of the arm head 13.

[0050] That is, in a state where the arm head 13 is covered by the cover 17, the protruding portion 17e of the wall portion 17a of the cover 17 abuts against the side surface 13a of the arm head 13, and the protruding portion 17e of the wall portion 17b of the cover 17 abuts against the side surface 13b of the arm head 13. Thereby, the cover 17 is fixed to the arm head 13 with high strength.

[0051] As described above, in a state where the arm head 13 is covered by the cover 17, at the connecting portion 14d of the arm main body 14, the protruding portion 17g of the cover 17 abuts against the shaft portion 14e of the arm main body 14, and the shaft portion 14e is pressed from above with high strength by the protruding portion 17g of the cover 17. Further, by the two protruding portions 17e on the left and right of the cover 17 abutting against the arm head 13, the cover 17 is fixed to the arm head 13 with high strength, and the cover 17 and the arm head 13 are integrated.

[0052] As shown in FIGS. 6 and 7, convex portions 13f are provided on the side surfaces 13a and 13b on the proximal end side of the arm head 13, and as shown in FIG. 10, on the inner walls of the wall portion 17a and the wall portion 17b of the cover 17, protruding portions 17e having groove portions 17h into which the convex portions 13f are fitted are provided. Further, the protruding portions 17e provided on the inner walls of the wall portion 17a and the wall portion 17b each have a hollow portion 17i provided outside the groove portion 17h in the width direction H1 of the cover 17.

[0053] That is, in the box-shaped protrusions 17e provided on the inner walls of the wall portions 17a and 17b respectively, there are provided an elongated groove portion 17h and a hollow portion 17i provided outside the groove portion 17h with a wall separating the groove portion 17h. In the elongated groove portion 17h, there are provided a concave portion 17j, a stepped portion 17m, and a concave portion 17k from the lower side to the upper side of the cover 17. In the groove portion 17h, the stepped portion 17m located between the concave portion 17j located on the lower side and the concave portion 17k located on the upper side is the highest.

[0054] When opening and closing the cover 17 with respect to the arm head 13, the convex portion 13f of the arm head 13 that fits into the elongated groove portion 17h of the cover 17 moves within the elongated groove portion 17h. For example, when opening the cover 17 with respect to the arm head 13, the convex portion 13f of the arm head 13 moves from the concave portion 17k located on the upper side, overcomes the intermediate stepped portion 17m, and moves to the concave portion 17j located on the lower side. Conversely, when closing the cover 17 with respect to the arm head 13, the convex portion 13f of the arm head 13 moves from the concave portion 17j located on the lower side, overcomes the intermediate stepped portion 17m, and moves to the concave portion 17k located on the upper side.

[0055] The above-described opening and closing operation of the cover 17 will be described by linking it with the fastening portion 17d of the cover 17 and the accommodating portion 13d of the arm head 13.

[0056] First, when opening the cover 17 with respect to the arm head 13, as shown in FIG. 12, the rear side (base end side) of the cover 17 is lifted upward. Then, the convex portions 13f outside the side surfaces 13a and 13b of the arm head 13 shown in FIG. 6 move within the groove portion 17h inside the wall portions 17a and 17b of the cover 17 shown in FIG. 10, and the cover 17 moves slightly backward with respect to the arm head 13.

[0057] Note that since the two protrusions 17e on the inner side of the cover 17 are in contact with the side surfaces 13a and 13b of the arm head 13, the convex portion 13f of the arm head 13 will not move within the groove portion 17h of the cover 17 unless the rear side of the cover 17 is lifted upward and a force is applied. That is, the cover 17 will not easily come off the arm head 13 unless the rear side of the cover 17 is lifted upward and a force is applied.

[0058] At this time, since the protrusion 17e provided on the inner side of the cover 17 has a hollow portion 17i outside the groove portion 17h, when the rear side of the cover 17 is lifted upward and a force is applied to the cover 17, the step portion 17m in the groove portion 17h of the cover 17 pushed by the convex portion 13f of the arm head 13 will be recessed. As a result, the convex portion 13f can move from the concave portion 17k in the groove portion 17h over the step portion 17m to the concave portion 17j.

[0059] Normally, in a state where no force is applied to the cover 17 from the outside, the two protrusions 17e of the cover 17 are in contact with the side surfaces 13a and 13b of the arm head 13, so that the arm head 13 and the cover 17 are integrated with high strength.

[0060] On the other hand, since the protrusion 17e provided on the inner side of the cover 17 has a hollow portion 17i, the protrusion 17e has an elastic force. Therefore, when the rear side of the cover 17 is lifted upward and a force is applied to the cover 17, the cover 17 will be in a state of being pushed by the convex portion 13f of the arm head 13, and the step portion 17m of the protrusion 17e of the cover 17 will be recessed. As a result, the convex portion 13f of the arm head 13 can move within the groove portion 17h, and as shown in FIG. 12, the rear side of the cover 17 can be lifted upward.

[0061] When the rear side of the cover 17 is lifted upward, the front side of the cover 17 (the side of the arm main body 14) drops downward. As a result, the fixing claw 17f of the fastening portion 17d of the cover 17 disengages from the engaging portion 13e in the front accommodating portion 13d of the arm head 13. Subsequently, by lifting the front side of the cover 17 and rotating the cover 17 with respect to the arm head 13, the cover 17 can be opened as shown in FIG. 11.

[0062] As described above, since the protruding portion 17e provided on the cover 17 of the present embodiment has an elastic force, the arm head 13 and the cover 17 can be integrated with high strength, and by applying an external force to the cover 17, it is also possible to remove the cover 17 from the arm head 13.

[0063] When closing the cover 17 with respect to the arm head 13, an operation reverse to the above-described operation of opening the cover 17 is performed. That is, with the rear side of the cover 17 lifted upward, the cover 17 is rotated and closed with respect to the arm head 13.

[0064] Thereafter, the fixing claw 17f on the front side of the cover 17 is disposed in the front accommodating portion 13d of the arm head 13, and a force is applied to the rear side of the cover 17 to push the cover 17 downward. As a result, the fixing claw 17f on the front side of the cover 17 is caught by the engaging portion 13e of the front accommodating portion 13d of the arm head 13, and the operation of closing the cover 17 is completed.

[0065] According to the wiper arm 11 of the present embodiment, since the fastening portion 17d is provided on the front side of the cover 17 (the side of the arm main body 14), when the cover 17 is closed with respect to the arm head 13, at the connecting portion 14d of the arm main body 14, the protruding portion 17g of the fastening portion 17d of the cover 17 abuts against the shaft portion 14e of the arm main body 14, and the shaft portion 14e is pressed from above with high strength by the protruding portion 17g of the cover 17.

[0066] This can suppress the play between the shaft portion 14e of the arm main body 14 and the connecting groove 13h of the arm head 13 in which the shaft portion 14e is disposed. That is, the play in the height direction T1 at the connecting portion 14d between the arm head 13 and the arm main body 14 can be suppressed.

[0067] In addition, since the protruding portion 17e is provided inside the cover 17, when the cover 17 is closed with respect to the arm head 13, the protruding portion 17e abuts against the side surfaces 13a and 13b of the arm head 13. Thereby, the cover 17 can be fixed to the arm head 13 with high strength, and the cover 17 and the arm head 13 can be integrated. That is, the play in the width direction H1 between the cover 17 and the arm head 13 can be suppressed.

[0068] Furthermore, since the protruding portion 17e is provided on the cover 17, when the cover 17 is closed with respect to the arm head 13, the cover 17 can be fixed to the arm head 13 with high strength, and the cover 17 and the arm head 13 can be integrated.

[0069] As a result, it is possible to suppress the vibration from the wiper motor that swings the wiper arm 11 from being propagated to the connecting portion 14d between the arm head 13 and the arm main body 14. That is, in a state where the cover 17 is closed with respect to the arm head 13, it is possible to simultaneously suppress both the play between the arm head 13 and the arm main body 14 and the play between the arm head 13 and the cover 17.

[0070] This can suppress the occurrence of a sound (rattling sound) different from normal due to interference between components due to play at the connecting portion 14d.

[0071] In addition, it is possible to suppress the vibration from the wiper motor during wiper arm driving from being propagated to the wiper blade 15 via the arm main body 14, and it is possible to suppress the occurrence of vibration (chattering) of the wiper blade 15.

[0072] From the above, it is possible to improve the quality of the wiper arm 11.

[0073] According to the wiper arm 11 according to the present embodiment, rattling at the connecting portion 14d between the arm head 13 and the arm body 14 can be suppressed, so that the load on the wiper motor that swings the wiper arm 11 can be reduced. As a result, the rotational efficiency of the wiper motor can be increased. Therefore, in the Sustainable Development Goals (SDGs) led by the United Nations, it is possible to contribute particularly to Goal 7 (Ensure access to affordable, reliable, sustainable and modern energy) and Goal 13 (Take urgent action to combat climate change and its impacts).

[0074] The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the gist thereof. For example, in the above-described embodiment, the wiper arm is applied to a rear wiper device that wipes a wiping surface such as a rear windshield of a vehicle such as an automobile. However, the present invention is not limited thereto, and it can also be applied to a wiper device mounted on the front side of a vehicle such as an automobile, a wiper device mounted on a ship, an aircraft, a railway vehicle, or the like.

Explanation of Reference Numerals

[0075] 10: Wiper device, 11: Wiper arm, 12: Support portion, 13: Arm head, 13a, 13b: Side surfaces, 13c: Top surface, 13d: Accommodating portion, 13e: Engaging portion, 13f: Convex portion, 13g: Fixed portion, 13h: Connecting groove, 14: Arm body, 14a, 14b: Wall portions (arm wall portions), 14c: Top wall, 14d: Connecting portion, 14e: Shaft portion, 14f: Arc-shaped portion, 14g: Flat portion, 15: Wiper blade, 16: Blade rubber, 17: Cover, 17a, 17b: Wall portions, 17c: Top wall, 17d: Fastening portion, 17e: Protruding portion, 17f: Fixed claw (part), 17g: Pushing-out portion (other part), 17h: Groove portion, 17i: Hollow portion, 17j, 17k: Concave portions, 17m: Step portion, 19: Spring, 20: Fixed member, D1, D2, D3: Lengths, H1: Width direction, L1: Longitudinal direction, T1: Height direction

Claims

1. An arm head, a cover covering the arm head, an arm body rotatably connected to the arm head, A wiper arm comprising: The cover has a top wall and wall portions connected to the top wall and facing each other, The top wall is provided with a fastening portion extending toward the arm head side in the height direction of the cover, The wall portion is provided with a protruding portion extending toward the arm head side in the width direction of the cover, The arm body is provided with a connecting portion connectable to the arm head, The arm head is covered by the cover in a state where the arm body and the arm head are connected by the connecting portion, A wiper arm in which a part of the fastening portion engages with the arm head so that the other part of the fastening portion abuts against the connecting portion, and the protruding portion abuts against the arm head.

2. The wiper arm according to claim 1, wherein the arm head has a receiving portion capable of receiving a part of the fastening portion.

3. The wiper arm according to claim 2, wherein the arm body includes arm wall portions arranged to face each other, The connecting portion extends along the width direction of the arm body and includes a shaft portion connecting the opposing arm wall portions, A wiper arm in which a part of the fastening portion engages with the arm head so that the other part of the fastening portion abuts against the shaft portion.

4. The wiper arm according to claim 2 or 3, wherein the arm head has a convex portion provided on a side surface of the arm head, The protruding portion includes a groove portion that fits with the convex portion and a hollow portion provided outside the groove portion in the width direction of the cover.

Images