JP6189711B2 - Wiper arm and vehicle wiper device including the same - Google Patents

Description

  The present invention relates to a wiper arm having a nozzle for injecting a cleaning liquid and a vehicle wiper device having the wiper arm.

  Some vehicle wiper devices inject (supply) cleaning liquid from a washer nozzle attached to a wiper arm toward the wiping direction of the wiper blade. For example, in a vehicle wiper device (wiper arm) disclosed in Patent Document 1 below, a configuration in which washer nozzles are respectively arranged at a middle portion and a tip portion in the longitudinal direction of the wiper arm and these nozzles are connected by a single hose is used. It has been adopted.

  However, according to this prior art, since the cleaning liquid is sprayed from the nozzles arranged at two locations of the intermediate portion and the tip portion with one system hose, the supply amount of the cleaning liquid sprayed from each nozzle is limited. Wiping performance cannot be obtained.

  On the other hand, in the vehicle wiper device (washer device) disclosed in Patent Document 2 below, as an example, the nozzle that injects the wiper blade in the longitudinal direction of the wiper blade to the wiping direction advance side in the forward movement and the wiping in the backward movement The structure which arrange | positions each nozzle injected to a direction progress side, and connects these nozzles by two systems of hoses is employ | adopted. Further, in this vehicle wiper device, the wiping direction and position of the wiper arm are detected from the wiper motor, and the drive current of the washer pump for driving the two pumps is directly switched via the cam switch provided in the wiper motor, thereby It is set as the structure which performs the injection switching to the wiper wiping direction advance side.

Special Table 2002-536244 JP 2003-48517 A

  However, according to this prior art, since the cleaning liquid is jetted from the nozzles provided in two places by the two systems of hoses, a good wiping performance can be obtained. It is difficult to run the hose in a stable state. In particular, since the hose is made of rubber, when it receives an external force, it may interfere with proper cleaning liquid injection, such as disconnection or easy bending. Therefore, this prior art has room for improvement in that the two hoses including the nozzle are arranged stably in the wiper arm. In addition, if the number of parts is increased during the improvement, the assembly work becomes complicated. Therefore, it is desirable to suppress the increase in the number of parts as much as possible.

  In view of the above facts, the present invention can maintain a stable routing state when routing two hoses in the arm body, and can also reduce the number of parts, and a wiper arm using the same. It is an object to obtain a vehicle wiper device.

  A wiper arm according to the present invention includes an arm body having a U-shaped cross-section in a direction perpendicular to the longitudinal direction of the arm, and a cleaning liquid injection hole disposed at a predetermined position in the longitudinal direction of the arm body. And a first nozzle part provided at a predetermined position in the longitudinal direction of the arm body and toward a position different from the landing point of the cleaning liquid sprayed from the spray hole of the first nozzle part. A second nozzle part having an injection hole for injecting a cleaning liquid; a first system hose accommodated in the arm body and connected to the first nozzle part; and the first system part in the arm body. A second system hose accommodated in a state aligned with the hose and connected to the second nozzle part; a first hose holding part that is attached to the arm body and holds the first system hose; In the first hose holding part It has a second hose holding portion provided body specifically to hold the hose of the second system, a hose holding portion having a, a.

  According to the wiper arm configured as described above, the arm main body of the wiper arm has a U-shaped cross section in a direction perpendicular to the longitudinal direction of the arm, and the first system connected to the first nozzle portion in the arm main body. The two hoses such as the second hose and the second hose connected to the second nozzle portion are accommodated in a line. When the cleaning liquid is supplied to the first system hose, the cleaning liquid is injected from the injection hole of the first nozzle portion. Further, when the cleaning liquid is supplied to the second system hose, the cleaning liquid is sprayed from the injection hole of the second nozzle part toward a position different from the landing point of the cleaning liquid sprayed from the injection hole of the first nozzle part. The As described above, in the wiper arm according to the present invention, since the cleaning liquid can be sprayed separately from the nozzle portions provided at two locations using two systems of hoses, the nozzles provided at two locations with one system of hoses. Compared with the case where the cleaning liquid is ejected from the part (for example, the prior art described in Patent Document 1), good wiping performance is obtained.

  Here, in this invention, the hose holding part is attached to the arm main body, the first hose holding part provided in the hose holding part holds the first system hose, and the hose holding part further includes the second hose holding part. The second system hose is held by the section. That is, a hose holding part is set for each hose. For this reason, the stable routing state can be maintained without causing the routing state of the first system hose and the second system hose to be complicated due to the rotation of the wiper arm. And since the 2nd hose holding | maintenance part is integrally provided in the 1st hose holding | maintenance part, compared with the structure which provides a hose holding | maintenance part separately for every hose, a number of parts is reduced.

  In the wiper arm according to the present invention, the first nozzle portion is disposed on the intermediate side in the longitudinal direction of the arm body, and the second nozzle portion is disposed on the distal end side of the arm body. .

  According to the wiper arm having the above-described configuration, the cleaning liquid is sprayed from two locations on the middle side and the tip side in the longitudinal direction of the wiper arm by the first nozzle portion and the second nozzle portion connected to different systems of hoses. Therefore, in a vehicle equipped with the vehicle wiper device using this wiper arm, the cleaning liquid is sufficiently supplied also to the longitudinal base end side of the wiper blade. In addition, the cleaning liquid that has landed on the longitudinal base end side of the wiper blade is widely spread in the longitudinal direction of the wiper arm by the traveling wind. For this reason, the cleaning liquid spreads in the longitudinal direction of the wiper blade, and the wiping performance is improved.

  Furthermore, in the wiper arm according to the present invention, the first nozzle portion is provided integrally with the hose holding portion.

  According to the wiper arm configured as described above, since the first nozzle portion is integrally provided in the hose holding portion, the function as a nozzle and the function of holding two hoses are integrated into one component. For this reason, it leads to a reduction in the number of parts and contributes to cost reduction.

  In the wiper arm according to the present invention, the first hose holding portion holds the first system hose in the arm body by connecting the first system hose, and the second hose holding portion. Is formed from the first hose holding portion to form a space portion with the inner wall surface of the arm body, and the second system hose is routed in the space portion by arranging the second system hose. The hose is held in the arm body.

  According to the wiper arm having the above configuration, the first system hose is firmly held in the arm body by connecting the first system hose to the first hose holding portion. On the other hand, the second hose holding part extends from the first hose holding part to form a space part with the inner wall surface of the arm body. Then, the second system hose is routed in this space, so that the second system hose is held in the arm body (separately from the first system hose). For this reason, the second system hose can move somewhat in the space (for example, in the longitudinal direction of the second system hose). Therefore, it becomes difficult to apply a load to the second nozzle portion, the posture of the second nozzle portion is stabilized, and the landing point of the cleaning liquid sprayed from the spray hole is difficult to shift.

  In the wiper arm according to the present invention, a first engagement engaged with a first engaged portion formed on one side wall portion of the arm main body on the outer side in the arm width direction of the first hose holding portion. And a second engagement portion that is engaged with a second engaged portion formed on the other side wall portion of the arm main body on the outer side in the arm width direction of the second hose holding portion. Further, the second hose holding part is configured to be elastically deformable in the extending direction.

  According to the wiper arm having the above configuration, as an example, the hose holding portion is assembled to the intermediate side of the arm body as follows. First, the first engaging portion formed on the first hose holding portion is engaged with the first engaged portion formed on one side wall portion on the intermediate side of the arm body. Next, a second engagement portion formed on the second hose holding portion is formed on the other side wall portion of the arm body while the second hose holding portion is elastically deformed in the extending direction. Engage with the joint. Thereby, the second hose portion is elastically restored, and the elastic restoring force acts as a force for engaging the second engagement portion with the second engaged portion. As described above, according to the present invention, the hose holding part can be attached to the arm main body with one touch, and after the hose holding part is attached to the arm main body, the hose holding part is caused by vibration of the vehicle body or pulsation when supplying the cleaning liquid. Inadvertent removal from the arm body is prevented.

  Further, in the wiper arm according to the present invention, the spray for injecting the cleaning liquid toward the position different from the landing point of the cleaning liquid sprayed from the spray hole of the second nozzle portion is provided on the distal end side in the longitudinal direction of the arm body. The 3rd nozzle part provided with the hole is arrange | positioned, The said 3rd nozzle part and the said 1st nozzle part are mutually connected by the hose of the said 1st system | strain.

  According to the wiper arm configured as described above, the second nozzle portion and the third nozzle portion, which are different from each other in the spraying direction of the cleaning liquid, are arranged on the distal end side in the longitudinal direction of the arm body. And the 3rd nozzle part and the 1st nozzle part are mutually connected by the hose of the 1st system. For this reason, when the cleaning liquid is supplied to the first system hose, the cleaning liquid is sprayed from the two locations of the first nozzle portion and the third nozzle portion. Further, when the cleaning liquid is supplied to the second system hose, the cleaning liquid is ejected from the second nozzle portion. As described above, in the present invention, the cleaning liquid is sprayed from a total of three locations, that is, one intermediate location in the longitudinal direction of the arm main body and two locations at the tip end with two systems of hoses. Therefore, only when the wiper arm reciprocally rotates, for example, only when the wiper arm moves backward, the cleaning liquid is ejected from the first nozzle unit and the third nozzle unit, and more cleaning liquid is discharged. If the wiper blade is in the middle of wiping (if the longitudinal direction of the wiper blade is in the longitudinal direction of the vehicle), the cleaning liquid is sprayed to the base end side of the wiper blade and the wiper arm is driven by the running wind. Since the cleaning liquid can be extended widely along the longitudinal direction, the cleaning liquid can be efficiently ejected. Thereby, the cleaning liquid to be used can be reduced.

Further, in the wiper arm according to the present invention, a lateral bending portion that bends to one side in the arm width direction is formed on the distal end side in the longitudinal direction of the arm body, and further, the other side in the arm width direction of the lateral bending portion. The third nozzle part is arranged on the side wall part located at the position.

According to the wiper arm configured as described above, the laterally bent portion that is bent to one side in the arm width direction is formed on the distal end side in the longitudinal direction of the arm body, and the arm body located on the other side in the arm width direction of the laterally bent portion is formed. Since the third nozzle portion is disposed on the side wall portion , the wiper blade does not become an obstacle, and the cleaning liquid can be easily sprayed immediately before the wiper blade. For this reason, the sprayed cleaning liquid can be immediately wiped off by the wiper blade, and the impediment to the driving field of view due to the landing cleaning liquid can be prevented.

  Further, in the wiper arm according to the present invention, the first nozzle portion and the third nozzle portion are set to have respective injection holes so as to inject cleaning liquid in directions opposite to each other with respect to the arm body. .

  According to the wiper arm configured as described above, the wiper blade is positioned on one side in the arm width direction with respect to the arm body by the lateral bending portion on the distal end side in the longitudinal direction of the arm body. In addition, the direction of cleaning liquid sprayed from the spray holes of the first nozzle part and the direction of cleaning liquid sprayed from the spray holes of the third nozzle part are opposite to each other with respect to the arm body. For this reason, the cleaning liquid supplied to the first system hose is always sprayed in opposite directions to the arm body, but the cleaning liquid sprayed from the spray hole of the first nozzle part and the spray hole of the third nozzle part The cleaning liquid sprayed from the water can be made to land on the same side with respect to the wiper blade.

  The vehicle wiper device according to the present invention further includes a pivot shaft that rotates about an axis when receiving a driving force, and a base end portion fixed to the pivot shaft so as to reciprocately rotate along the surface to be wiped. A wiper arm according to any one of claims 1 to 8, and a wiper blade attached to a distal end portion of the wiper arm and wiping the surface to be wiped.

  According to the wiper device for a vehicle having the above-described configuration, the pivot shaft rotates around the axis when receiving a driving force. Accordingly, the wiper arm reciprocates along the surface to be wiped, and the wiper blade attached to the tip of the wiper arm wipes the surface to be wiped.

  Here, in the wiper arm of the vehicle wiper device having the above-described configuration, two systems of hoses are routed in the arm body, but the first system of the first system by the first hose holding section and the second hose holding section of the hose holding section. The hose and the second system hose are individually held. As a result, it is possible to maintain a stable hose arrangement state when two hose lines are accommodated in the arm body and arranged, and the number of parts can be suppressed.

  Further, the vehicle wiper device according to the present invention is configured to selectively switch the supply of the cleaning liquid to the first system hose and the second hose so that the cleaning liquid is sprayed toward the wiping direction of the wiper blade. It has a mechanism.

  According to the vehicle wiper device configured as described above, the supply of the cleaning liquid is selectively switched between the first system hose and the second system hose by the switching mechanism. Then, by this switching, the cleaning liquid is sprayed to the wiping direction advance side of the wiper blade. For this reason, since the sprayed cleaning liquid is immediately wiped off by the wiper blade, it is prevented that the cleaning liquid that has landed is left for a relatively long time until the cleaning liquid that has landed is wiped off.

It is the perspective view which looked at the wiper arm in a state where a back cover was removed concerning the present embodiment from the back side. It is the perspective view which looked at the wiper arm shown in Drawing 1 from the front side (vehicle front side). It is the top view seen from the outside (vehicle front side) of the windshield glass which shows the whole wiper device for vehicles concerning this embodiment. It is an expansion perspective view which shows the mounting state of the 1st nozzle and hose holding | maintenance part provided in the intermediate side of the wiper arm shown by FIG. (A) and (B) are the perspective views of the single item which changes and shows the angle which looks at the 1st nozzle and hose holding part which are shown by FIG. It is an expansion perspective view which shows the mounting state of the 2nd nozzle and 3rd nozzle provided in the front end side of the wiper arm shown by FIG. It is an expansion perspective view which changes the angle which sees the mounting state of the 2nd nozzle and 3rd nozzle which are shown by FIG. It is a perspective view of the single item of the 3rd nozzle shown by FIG. FIG. 4 is a circuit diagram showing an electrical configuration of the vehicle wiper device shown in FIG. 3. It is a timing chart which shows the switching timing of the wiper apparatus for vehicles shown by FIG. (A) is a top view corresponding to FIG. 2 which shows the state in the middle of the wiper blade shown by FIG. 2 being rotated to the one direction of rotation, (B) is the wiper shown by FIG. It is a top view corresponding to FIG. 2 which shows the state in the middle of the blade rotating in the rotation direction other side.

  Hereinafter, a vehicle wiper device 10 according to an embodiment of the present invention will be described with reference to FIGS.

As shown in FIG. 3, the vehicle wiper apparatus 10 has a wiper arm 12 formed in a substantially elongated shape, a wiper blade 14 for wiping an object to be wiped surface S of the window India windshield WG of the vehicle (automobile) , Including. First, the overall configuration of the vehicle wiper device 10 will be outlined with reference to FIGS.

(About the overall configuration of the wiper arm 12)

  As shown in FIGS. 1 and 2, the wiper arm 12 includes an arm body 16 having an open cross-sectional structure formed in an elongated shape, a back cover (not shown) that closes the bottom of the arm body 16, and an arm body 16. The outer cover is constituted by the distal end cover 20 attached to the distal end portion. The arm body 16, the back cover, and the tip cover 20 are all made of resin.

  Specifically, the arm body 16 is formed in a substantially U shape (open cross-sectional structure) when the arm body 16 is cut in a direction orthogonal to the longitudinal direction. The wiper arm 12 is arranged such that the opening side of the arm body 16 is on the windshield glass WG side. Furthermore, the arm main body 16 includes a pair of side wall portions 16A and 16B arranged to face each other, and a top wall portion 16C that connects the side wall portions 16A and 16B.

  A fixing portion 22 formed in a bottomed cylindrical shape is formed on the base end side of the arm body 16. A circular through hole 24 is coaxially formed in the shaft core portion at the bottom of the fixed portion 22. The base end portion of the wiper arm 12 is fixed to the pivot shaft 26 by inserting the distal end portion of the pivot shaft 26 (see FIG. 3) into the through hole 24 from the lower side of the arm and fixing it. Accordingly, the wiper arm 12 is configured to rotate integrally around the pivot shaft 26 when the pivot shaft 26 rotates.

  In addition, a lateral bending portion 28 bent in a crank shape toward one side in the arm width direction is integrally formed on the distal end side of the arm body 16. Furthermore, as shown in FIG. 1, the tip of the arm body 16 is open in the arm longitudinal direction. U-shaped slits 30 are formed in parallel on the side wall portions 16A and 16B of the arm main body 16 located at the open end. Further, an engagement hole 32 that is opened in a rectangular shape is formed in the top wall portion 16 </ b> C located on the distal end side of the arm body 16. A clip (not shown) is inserted in the longitudinal direction of the arm from the open side of the distal end of the arm body 16 and attached to the inner side of the distal end portion of the arm body 16. That is, the clip (not shown) is formed in a substantially U shape when viewed in the longitudinal direction, and the engaging convex portions formed on the outer side surfaces of the both side portions are inserted into the slits 30 and on the top portion. The formed rectangular engagement protrusion is elastically engaged with the engagement hole 32 from the lower side of the arm, so that it is mounted inside the distal end portion of the arm body 16 in a housed state. Further, cylindrical support shafts are formed coaxially and integrally on the inner side surfaces of both sides of the clip, and are rotatably attached to a connection holder (to be described later) of the wiper blade 14.

  Furthermore, a tip cover 20 is attached to the tip of the arm body 16 with the clip attached. The distal end cover 20 has a substantially U-shaped cross section when cut in a direction orthogonal to the longitudinal direction, and is fitted on the distal end portion of the arm body 16. Furthermore, the tip of the tip cover 20 is opened so that a connection holder (to be described later) of the wiper blade 14 can be inserted.

(About wiper blade 14)

As shown in FIGS. 1 to 3, the wiper blade 14 includes a rubber blade rubber 34 formed in a substantially long shape. The blade rubber 34 includes a base portion 34A having a substantially rectangular cross section disposed on the upper side, and a wiping portion 34B having a substantially triangular cross section connected from the base portion 34A via a neck portion. The distal end of the wiping portion 34B (lower end portion), a lip for wiping an object to be wiped surface S of the window India windshield WG is formed. Further, a substantially long plate-like backing (not shown) made of a spring plate material is disposed on the upper surface of the base portion 34A. The base 34A and the backing of the blade rubber 34 are held in a state of being covered with a holding case (not shown) that is formed in a long shape and has a substantially C-shaped cross section.

  Further, a coupling holder (not shown) is disposed at the longitudinal center of the wiper blade 14, and the backing is held by the coupling holder in a state in which movement in the longitudinal direction is restricted. The rubber 34 and backing are held. Further, the above-described clip to which the distal end portion of the arm main body 16 of the wiper arm 12 is connected is assembled to the connection holder so as to be rotatable around the support shaft portion.

  The wiper arm 12 described above is pressed toward the surface to be wiped S of the windshield glass WG by a pressurizing mechanism (not shown), and the blade rubber 34 of the wiper blade 14 configured as described above receives the pressing force to receive the windshield glass WG. The wiping surface S is pressed and contacted.

  FIG. 3 shows a wiping range of the vehicle wiper device 10 including the wiper arm 12 and the wiper blade 14 configured as described above. As shown in this figure, the wiper blade 14 is disposed in an offset state on the one side in the rotational direction (the bending direction side of the arm body 16 by the lateral bending portion 28) with respect to the wiper arm 12. Further, as described above, the distal end portion of the substantially cylindrical pivot shaft 26 is fastened and fixed to the fixing portion 22 formed at the base end portion of the wiper arm 12. The pivot shaft 26 is rotatably supported by a pivot holder (not shown) fixed to a vehicle frame or the like, and is connected to a wiper motor WM (see FIG. 9) via a link mechanism. Then, the pivot shaft 26 reciprocates by the driving force of the wiper motor WM, so that the wiper arm 12 reciprocates between a stop position (shown by the solid line in FIG. 3) and a reverse position (shown by the one-dot chain line in FIG. 3). It is designed to rotate. Note that the direction of the wiper arm 12 from the stop position to the reverse position (the direction of arrow A in FIG. 3) is one side of the rotation direction (the forward movement side of the reciprocating rotation), and the direction from the reverse position to the stop position. The direction of arrow B in FIG. 3 is the other side of the rotation direction (return side of reciprocating rotation).

  Next, the main part of this embodiment will be described.

(About the layout of each component housed in the wiper arm 12)

  As shown in FIG. 1, the first system hose 40 and the second system hose 42 each made of rubber are accommodated in the arm body 16 of the wiper arm 12 described above in a state where they are aligned in the arm width direction. Has been. A first nozzle 44 (may also be referred to as “intermediate nozzle” or the like) is disposed on the middle side of the arm body 16 in the longitudinal direction. Further, a second nozzle 46 (which may be referred to as a “front end side nozzle” or a “first front end side nozzle” or the like) is disposed on the distal end side in the longitudinal direction of the arm body 16, and the arm body 16. A third nozzle 48 (may also be referred to as a “front end side nozzle”, a “second front end side nozzle”, a “lateral bend side nozzle”, or the like) is disposed in the above-described lateral bending portion 28. Details will be described below.

(About the first system hose 40 and the second system hose 42)

  The first system hose 40 is divided into four parts: a proximal end hose 50, an intermediate upstream hose 52, an intermediate downstream hose 54, and a distal end hose 56.

  The distal end portion of the proximal end hose 50 and the proximal end portion of the intermediate upstream hose 52 are connected to and communicated with each other via a hose connection member 58. The hose connection member 58 is configured as a cylindrical member in which a cap-shaped locking portion is formed at both ends in the axial direction and a through-hole serving as a flow path is formed in the axial core portion, and the through-hole serving as a flow path Includes a check valve (not shown). This check valve keeps the cleaning liquid in each hose and prevents the cleaning liquid from leaking from the nozzle. Further, the distal end portion of the intermediate downstream hose 54 and the proximal end portion of the distal end side hose 56 are connected and communicated with each other via a hose connection member 60 having the same configuration as the hose connection member 58.

  On the other hand, the second system hose 42 is disposed in parallel with the proximal end hose 50 of the first system hose 40 and is configured to have the same length as the proximal end hose 50 and the proximal end hose 62. A single upstream hose 52, an intermediate downstream hose 54, and a tip side hose 56 of one system hose 40 are configured by one main hose 64. That is, the second system hose 42 is divided into two hoses.

  The distal end portion of the proximal end side hose 62 and the proximal end portion of the main hose 64 are connected and communicated with each other via a hose connection member 66 having the same configuration as the hose connection member 58.

(About the 1st nozzle 44 and the 2nd hose holding part 82)

  As shown in FIGS. 5A and 5B, the first nozzle 44 includes a cylindrical portion 70A in which a through hole 68 serving as a flow path is formed in the axial center portion, and the axial direction of the cylindrical portion 70A. A first hose holding portion formed of a first hose connection portion 70B in the shape of a cap formed at one end of the second hose connection portion 70C in the shape of a cap and formed in the other end portion of the cylindrical portion 70A in the axial direction. 70. As shown in FIG. 4, in the state where the first nozzle 44 is assembled in the arm body 16, the first hose connection portion 70B faces the arm proximal end side, and the second hose connection portion 70C faces the arm distal end side. It is arranged to face. The front end portion of the intermediate upstream hose 52 of the first system hose 40 is connected to the first hose connection portion 70B. Further, the base end portion of the intermediate downstream hose 54 of the first system hose 40 is connected to the second hose connection portion 70C.

  Further, as shown in FIGS. 4 and 5, a support wall formed in a substantially J shape when viewed in the axial direction of the cylindrical portion 70 </ b> A on the outer peripheral portion of the cylindrical portion 70 </ b> A in the first hose holding portion 70. 74 is integrally formed. In a state where the first nozzle 44 is assembled in the arm body 16, the outer surface in the arm width direction of the support wall 74 is a contact surface 74 </ b> A that contacts the inner surface of one side wall portion 16 </ b> A of the arm body 16. ing. Further, a first engaging portion 76 having an elongated right triangular prism shape is integrally formed along the arm longitudinal direction at an intermediate portion in the longitudinal direction of the contact surface 74A. The first engaging portion 76 protrudes outward in the arm width direction. Correspondingly, the inner surface of one side wall portion 16A of the arm body 16 has a long hole in which the first engagement portion 76 can engage with the first engagement portion 76 at a position corresponding to the arm width direction. The first engaged portion 78 is provided. In addition, the 1st to-be-engaged part 78 may be formed in the concave groove shape of the right triangular prism shape which the 1st engaging part 76 can engage. Moreover, the uneven | corrugated relationship of the 1st engaging part 76 and the 1st to-be-engaged part 78 may be reverse, and each may have an uneven | corrugated | grooved part and the relationship fitted together. The modified example and the alternative relationship are as follows: a second engaging portion 96 and a second engaged portion 98, a third engaging portion 124 and a third engaged portion 126, a fourth engaging portion 134 and a fourth engaged portion, which will be described later. The same applies to the engaging portion 136.

  Moreover, the nozzle part 80 and the 2nd hose holding | maintenance part 82 are integrally formed in the upper end part of the support wall 74 mentioned above in the state located in a line with the axial direction of 70 A of cylindrical parts. The nozzle portion 80 is configured as a portion extending in an arc surface shape along the outer peripheral portion of the cylindrical portion 70A with a predetermined width from the end portion on the first hose connection portion 70B side at the upper end portion of the support wall 74. Yes. An intermediate injection hole 86 through which the cleaning liquid 84 (see FIGS. 11A and 11B) is injected is formed on the front end side of the nozzle portion 80 in the extending direction. The intermediate injection hole 86 communicates with the inside of the cylindrical portion 70A.

  The second hose holding part 82 is disposed with a groove 88 between the nozzle part 80 and the second hose holding part 82. The reason why the groove 88 is separated from the nozzle portion 80 is to prevent the nozzle portion 80 from being affected by the elastic deformation of a pair of leg portions 90 described later. Further, the second hose holding portion 82 extends in an S shape when viewed in the longitudinal direction of the tubular portion 70A so as to cover the tubular portion 70A from the upper end portion of the support wall 74 from above. Further, the second hose holding part 82 is divided into two forks in the middle of extension, and includes a pair of leg parts 90 arranged in the axial direction of the cylindrical part 70A. A predetermined gap 92 is formed between the upper portion 90A and the intermediate portion 90B of the pair of leg portions 90 and the outer peripheral portion of the cylindrical portion 70A. Thereby, the pair of leg portions 90 can be elastically deformed in the contracting direction. In addition, a rectangular flat plate-like pressing portion 94 is formed at the end of each leg portion 90C on the extending direction side of the lower portion 90C. The pressing portion 94 extends in a direction orthogonal to the lower portion 90C of the leg portion 90 (the thickness direction of the leg portion 90). Further, in the center of the pressing portion 94, a second engaging portion 96 having an elongated track shape is integrally formed along the longitudinal direction of the arm. Correspondingly, the inner side surface of the other side wall portion 16B of the arm body 16 has a length that allows the second engagement portion 96 to engage with the pair of second engagement portions 96 at locations corresponding to the arm width direction. A second engaged portion 98 formed as a hole is provided.

  As shown in FIG. 4, in a state where the first nozzle 44 is mounted in the arm body 16, the main hose 64 of the second system hose 42 is disposed below the lower portion 90 </ b> C of the pair of legs 90. A space portion 100 for accommodating and holding is formed. The space portion 100 is provided on the inner side of the arm body 16 and on the side of the cylindrical portion 70A. In addition, the lower surface of the lower portion 90 </ b> C of the leg portion 90 is in contact with the main hose 64, and thus is formed in a concave curved surface shape along the curved surface shape of the main hose 64. Further, the intermediate portion 90B of the leg portion 90 extends to the bottom surface (the back surface of the top wall portion 16C) side of the arm body 16 to the lower side of the cylindrical portion 70A. It is preferable to set the length of the intermediate portion 90B so that the distance between the lower end of the intermediate portion 90B and the bottom surface of the arm body 16 is equal to the outer diameter of the main hose 64. Thereby, the function as a partition wall which bisects the internal space of the arm main body 16 in the arm longitudinal direction is given to the intermediate part 90B.

(About the second nozzle 46)

  As shown in FIGS. 6 and 7, the second nozzle 46 is formed integrally with the nozzle portion 46 </ b> A formed in a substantially rectangular flat plate shape and on the back side of the nozzle portion 46 </ b> A and on one side in the longitudinal direction. A fitting portion 46B having a small rectangular flat plate shape, a cylindrical portion 46C extending in a substantially L shape from the center of the back surface of the fitting portion 46B, and the back surface side of the fitting portion 46B and the root of the cylindrical portion 46C. Are formed by a rectangular thin plate-shaped sandwiching portion 46D formed integrally with the third hose connection portion 46E formed at the distal end portion of the cylindrical portion 46C.

A tip spray hole 102 for spraying the cleaning liquid 84 is formed in the vicinity of the corner portion of the nozzle portion 46A in the arm longitudinal direction and on the windshield glass WG side. Further, the sandwiching portion 46D extends and extends from the fitting portion 46B. Further, a rectangular opening 104 into which the fitting portion 46B can be fitted is formed in the other side wall portion 16B of the arm body 16. The opening width of the opening 104 is set to be slightly longer than the length from the base end of the fitting portion 46B to the tip of the clamping portion 46D. The second nozzle 46 is inserted from the outer side of the arm into the opening 104 from the third hose connection portion 46E, and the fitting portion 46B is fitted into the opening 104 while the clamping portion 46D is hidden, and then the nozzle 46 A of nozzle parts are slid along the arm longitudinal direction so that the peripheral part of the opening part 104 may be pinched | interposed between the part 46A and the clamping part 46D. Thereafter, the second nozzle 46 is mounted on the outer side surface of the other side wall portion 16B on the distal end side of the arm body 16 by connecting the distal end portion of the main hose 64 to the third hose connection portion 46E.

(About the 3rd nozzle 48 and the 2nd hose holding part 118)

  As shown in FIGS. 6 to 8, the third nozzle 48 includes a substantially cylindrical tubular portion 48 </ b> A in which a through hole 108 serving as a flow path is formed in the shaft core portion and the tip portion is closed, A cap-shaped fourth hose connecting portion 48B as a “first hose holding portion” formed at one end portion in the axial direction of the tubular portion 48A (the end portion on the proximal end side of the arm body 16), and the tubular portion 48A And a nozzle portion 48C formed in a substantially bowl shape at the other end portion in the axial direction. The side opposite to the side where the nozzle portion 48C is formed at the other axial end of the cylindrical portion 48A is not a circular arc surface but a vertical surface 110 parallel to one side wall portion 16A of the arm body 16. . In a state where the third nozzle 48 is assembled in the arm main body 16, the fourth hose connection portion 48B is disposed so as to face the arm proximal end side, and the nozzle portion 48C is directed to the arm distal end side. The distal end portion of the intermediate downstream hose 54 of the first system hose 40 is connected to the fourth hose connection portion 48B.

As described above, the third nozzle 48 is disposed in the lateral bending portion 28 of the arm body 16 (so that the nozzle portion 48C is disposed). Precisely, the cutout portion cut out from the upper end of the side wall portion in the range from the arm distal end side to the proximal end side of the lateral bending portion 28 of the linear portion 112 that transitions to the lateral bending portion 28 in one side wall portion 16A of the arm body 16. 114 is formed, and the nozzle portion 48 </ b> C formed in a semicircular bowl shape is fitted into the notch 114. The notch depth of the notch 114 is substantially matched to the thickness of the nozzle 48C. Further, the outer peripheral surface of the nozzle portion 48C is formed in a shape in which a straight surface and a curved surface are combined so as to match the shape of the one side wall portion 16A of the arm body 16. A (second) tip injection hole 116 through which the cleaning liquid 84 is jetted is formed on the tip side of the outer peripheral surface of the nozzle portion 48C. The tip injection hole 116 communicates with the tip of the cylindrical portion 48A. The direction of the front end injection hole 116 formed in the third nozzle 48 and the direction of the intermediate injection hole 86 formed in the first nozzle 44 and the front end injection hole 102 formed in the second nozzle 46 are described below. Are set in directions opposite to each other. However, since the wiper blade 14 is positioned on one side in the arm width direction with respect to the arm body 16 by the lateral bending portion 28, the direction of the intermediate injection hole 86 and the front end injection hole 116 is opposite to each other with respect to the arm body 16. Even so, the cleaning liquid 84 sprayed from both the spray holes 86 and 116 is landed on the same side with respect to the wiper blade 14 (see FIG. 11B).

  Further, the third nozzle 48 is integrally formed with a second hose holding part 118 having the same structure as the second hose holding part 82 described above. More specifically, the outer peripheral part of the axially intermediate part of the cylindrical part 48A (generally the part excluding the range where the fourth hose connection part 48B and the nozzle part 48C are formed) is on the same direction side as the nozzle part 48C. The support wall 120 is integrally formed. The second hose holding part 118 is arranged with a groove 122 between the nozzle part 48C. The reason why the groove 122 is separated from the nozzle portion 48C is to prevent the nozzle portion 48C from being affected by the elastic deformation of a pair of leg portions 128 described later. In a state where the third nozzle 48 is assembled in the arm main body 16, the vertical surface 110 on the outer side in the arm width direction of the support wall 120 is in contact with the inner surface of one side wall portion 16 </ b> A of the arm main body 16. Has been. Further, a third engaging portion 124 having a rectangular triangular shape that is elongated along the longitudinal direction of the arm is integrally formed at an intermediate portion of the vertical surface 110 in the longitudinal direction. The third engagement portion 124 protrudes outward in the arm width direction. Correspondingly, the inner surface of one side wall portion 16A of the arm main body 16 has a long hole in which the third engagement portion 124 can engage with the third engagement portion 124 at a position corresponding to the arm width direction. A third engaged portion 126 is provided.

  Further, the second hose holding part 118 is integrally formed at the upper end part of the support wall 120 described above. The second hose holding portion 118 extends from the upper end portion of the support wall 120 in an S shape when viewed in the longitudinal direction of the tubular portion 48A so as to cover the tubular portion 48A from above. Further, the second hose holding part 118 is divided into two forks in the middle of extension, and includes a pair of leg parts 128 arranged in the axial direction of the cylindrical part 48A. The upper portions 128A of the pair of leg portions 128 are integrated with the outer peripheral portion of the cylindrical portion 48A, but a predetermined gap 130 is formed between the intermediate portion 128B and the outer peripheral portion of the cylindrical portion 48A. Thereby, the pair of leg portions 128 can be elastically deformed in a direction in which the intermediate portion 128B approaches the cylindrical portion 48A. A predetermined gap may be formed between the upper portion 128A as well as the intermediate portion 128B and the cylindrical portion 48A. In addition, a rectangular flat plate-shaped pressing portion 132 is formed at the end of each leg portion 128 on the extending direction side of the lower portion 128C. The pair of leg portions 128 are connected by a pressing portion 132. The pressing portion 132 extends in a direction orthogonal to the lower portion 128 </ b> C of the leg portion 128 (the thickness direction of the leg portion 128). Further, in the center of the pressing portion 132, a fourth engaging portion 134 having an elongated track shape is integrally formed along the longitudinal direction of the arm. Correspondingly, the inner side surface of the other side wall portion 16B of the arm body 16 is a long hole in which the fourth engaging portion 134 can be engaged with the fourth engaging portion 134 at a position corresponding to the arm width direction. A formed fourth engaged portion 136 is provided.

  Further, in a state where the third nozzle 48 is mounted in the arm body 16, a space portion for accommodating and holding the main hose 64 of the second hose 42 below the lower portion 128 </ b> C of the pair of leg portions 128. 138 is formed. The space 138 is provided on the inner side of the arm body 16 and on the side of the cylindrical portion 48A. Further, the lower surface of the lower portion 128 </ b> C of the leg portion 128 is in contact with the main hose 64, and thus is formed in a concave curved surface shape along the curved surface shape of the main hose 64.

  Further, the above-described proximal end hose 50 of the first system hose 40 and the proximal end hose 62 of the second system hose 42 are connected to the second washer pump (not shown) and the second through the joint member 140 (see FIG. 2). Each is connected to one washer pump. The first washer pump is connected to a washer tank (not shown), and is configured such that the cleaning liquid 84 is supplied by driving the first washer pump motor PM1 (see FIG. 9). Similarly, the second washer pump is connected to a washer tank (not shown), and the second washer pump motor PM2 (see FIG. 9) is driven to supply the cleaning liquid 84.

(About the electrical configuration of the vehicle wiper device 10)

  Next, the electrical configuration of the vehicle wiper device 10 configured as described above will be described with reference to FIG.

  The vehicle wiper device 10 includes a wiper switch sw1 and a wiper motor WM. When the wiper switch sw1 is turned on, the wiper motor WM is driven, and the pivot shaft 26 is rotated. The wiper switch sw1 has “+ B terminal”, “S terminal”, “+1 terminal”, and “+2 terminal”, and the “+ B terminal” is connected to the battery of the vehicle.

  The wiper motor WM is commonly used for the high speed brush, the low speed brush, and the low speed and the high speed in order to correspond to the high speed mode in which the vehicle wiper device 10 operates at a high speed and the low speed mode in which the vehicle wiper apparatus 10 operates at a low speed. Has a brush. The positive terminal connected to the low speed brush of the wiper motor WM is connected to the “+1 terminal” of the wiper switch sw1, and the positive terminal connected to the high speed brush is connected to the “+2 terminal”. The negative terminal connected to the common brush of the wiper motor WM is grounded to GND.

  The wiper motor WM is provided with a cam switch csw corresponding to the wiping position of the wiper blade 14, and even if the wiper switch sw1 is turned off with the wiper blade 14 being placed at a position other than the stop position, the cam switch csw The wiper blade 14 is configured to return to the stop position.

  The cam switch csw includes “a contact”, “b contact”, “c contact”, “d contact”, and a cam plate cp. The “a contact” is connected to the “+ B terminal” of the wiper switch sw1, and the “b contact” is grounded together with the negative terminal of the wiper motor WM. The “c contact” is connected to the “S terminal” of the wiper switch sw1, and the “d contact” is connected to a coil L of a relay of a washer system described later.

  The cam plate cp is configured to rotate integrally with a worm wheel (not shown) connected to the output shaft of the wiper motor WM. When the wiper blade 14 reciprocates between the stop position and the reverse position, the cam plate The cp is rotated once. FIG. 3 shows a state where the wiper blade 14 is disposed at the stop position. When the wiper motor WM is driven, the cam plate cp rotates, and the cam plate cp connects the “c contact” to either the “b contact” or the “a contact”. Specifically, when the wiper blade 14 is in a position other than the stop position, the “c contact” is connected to the “a contact”. Thereby, even if the wiper switch sw1 is turned off when the wiper blade 14 is at a position other than the stop position, the drive current is supplied to the wiper motor WM via the cam switch csw. When the wiper blade 14 is rotated to the stop position, the “c contact” is connected to the “b contact”. Thus, the low speed brush and the common brush of the wiper motor WM are closed at the GND potential, and the wiper motor WM is stopped at the stop position.

  Further, the vehicle wiper device 10 includes a washer system, and the washer system includes a first washer pump motor PM1 that drives the first washer pump, and a second washer pump motor PM2 that drives the second washer pump. Have. One end of each of the first washer pump motor PM1 and the second washer pump motor PM2 is grounded via the washer switch sw2. Further, one of the other ends of the first washer pump motor PM1 and the second washer pump motor PM2 is connected to a vehicle battery by a switching contact of a washer relay.

  A wiper switch sw1 is connected between the first washer pump motor PM1 and the second washer pump motor PM2 and the washer switch sw2 via a washer interlocking circuit. Thereby, when the washer switch sw2 is turned on, the wiper is operated by the wiper relay in the washer interlocking circuit.

  Then, the coil L of the washer relay of the washer system is operated based on whether or not the cam plate cp is connected to the “d contact”, and one of the first washer pump motor PM1 and the second washer pump motor PM2 is operated. Alternatively, a current is supplied. The cam plate cp, the coil L, the first washer pump motor PM1, and the second washer pump motor PM2 correspond to the “switching mechanism” in the present invention.

  Specifically, as shown in the timing chart of FIG. 10, when the washer switch sw2 is turned on while the ignition switch (IG SW) of the vehicle is turned on, the first washer pump motor PM1 is driven by the washer relay. Is turned on. Then, the wiper motor WM is turned on by the wiper relay in the washer interlocking circuit, and the wiper blade 14 is rotated (forwarded) from the stop position to the reverse position. In FIG. 10, the state where the wiper blade 14 is rotated (forward) in one direction of rotation is described as “OPEN”, and the wiper blade 14 is rotated (returned) in the other direction of rotation. This state is described as “CLOSE”.

  Then, at the position before the wiper blade 14 reaches the reverse position (position where “OPEN” is switched to “CLOSE”), the first washer pump motor PM1 is driven by the washer relay to the second washer pump motor PM2. It is set to switch. Hereinafter, this switching position is referred to as “upper switching position”, and the position of the wiper blade 14 at this time corresponds to the position indicated by the one-dot chain line in FIG. 3 (see FIG. 3).

  On the other hand, when the wiper blade 14 is rotated (returned) from the reverse position to the stop position, the washer blade 14 is at a position just before the wiper blade 14 reaches the stop position (position where “CLOSE” is switched to “OPEN”). The relay is set to switch from driving the second washer pump motor PM2 to driving the first washer pump motor PM1. Hereinafter, this switching position is referred to as a “lower switching position”, and the position of the wiper blade 14 at this time corresponds to the position indicated by the one-dot chain line in FIG.

  That is, as shown in FIG. 11A, until the wiper arm 12 is rotated to one side in the rotation direction and reaches the upper switching position, the cleaning liquid is discharged from the second nozzle 46 via the second system hose 42. 84 is supplied. Then, at the upper switching position before the reversing position, the driving of the first washer pump motor PM1 is switched to the driving of the second washer pump motor PM2, and the first nozzle 44 and the third nozzle are connected via the hose 40 of the first system. The cleaning liquid 84 is supplied from 48.

  On the other hand, as shown in FIG. 11B, the first nozzle is passed through the first system hose 40 until the wiper arm 12 is turned from the reverse position to the other side in the turning direction and reaches the lower switching position. The cleaning liquid 84 is supplied from the 44 and the third nozzle 48. Then, at the lower switching position before the stop position, the driving of the second washer pump motor PM2 is switched to the driving of the first washer pump motor PM1, and the cleaning liquid 84 is supplied from the second nozzle 46 via the hose 42 of the second system. It is configured to be.

  And the area | region between an upper switching position and a lower switching position is made into the center wiping area | region CA (refer FIG. 3), and it is equidistant from the center position (a stop position and an inversion position) of the rotation direction in central wiping area | region CA. Is a central position CL in the rotational direction (see FIG. 3).

  Next, the operation and effect of this embodiment will be described.

In the vehicle wiper apparatus 10 configured as described above, by supplying a cleaning liquid 84 to be wiped surface S of the window India windshield WG, when wiping an object to be wiped surface S by the wiper blade 14, washer switch Set sw2 to ON. When the washer switch sw2 is turned on, the wiper motor WM is driven for a predetermined time in conjunction with the washer switch sw2, and the wiper blade 14 is rotated together with the wiper arm 12 from the stop position to one side in the rotation direction at a low speed. At this time, the first washer pump motor PM1 is driven, and the cleaning liquid 84 is supplied from the second nozzle 46 to the wiper blade 14 on one side in the rotational direction (wiping progress direction side). At the upper switching position, the driving of the first washer pump motor PM1 is switched to the driving of the second washer pump motor PM2, and the cleaning liquid 84 is supplied from the first nozzle 44 and the third nozzle 48.

  When the wiper blade 14 is further rotated from the upper switching position to one side in the rotation direction, the wiper blade 14 is reversed at the reversal position and rotated to the other side in the rotation direction. At this time, the cleaning liquid 84 is supplied from the first nozzle 44 and the third nozzle 48 to the wiper blade 14 on the other side in the rotational direction (wiping progress direction side). At the lower switching position, the driving is switched from the driving of the second washer pump motor PM2 to the driving of the first washer pump motor PM1, and the cleaning liquid 84 is supplied from the second nozzle 46.

  When the wiper blade 14 is further rotated from the lower switching position to the other side in the rotation direction, the wiper blade 14 is reversed at the stop position and rotated to one side in the rotation direction. Thereafter, the reciprocating rotation of the wiper blade 14 is repeated a predetermined number of times.

  By the way, in the wiper arm 12 according to this embodiment, the arm body 16 of the wiper arm 12 has a U-shaped cross section when cut in a direction perpendicular to the longitudinal direction of the arm. Two hoses such as a first hose 40 connected to the first nozzle 44 (and the third nozzle 48) and a second hose 42 connected to the second nozzle 46 are accommodated side by side. When the cleaning liquid 84 is supplied to the first system hose 40, the cleaning liquid 84 is injected from the intermediate injection hole 86 of the first nozzle 44 (and the front end injection hole 116 of the third nozzle 48). Further, when the cleaning liquid 84 is supplied to the second system hose 42, the cleaning liquid 84 is sprayed from the tip injection hole 102 of the second nozzle 46. As described above, in the wiper arm 12 according to the present embodiment, the cleaning liquid 84 can be separately jetted from the first nozzle 44 and the second nozzle 46 provided at two locations using two systems of hoses, respectively. Good wiping performance can be obtained as compared with the case where the cleaning liquid is sprayed from the nozzles provided at two positions by the system hose.

  Here, in the present embodiment, the first nozzle 44 is attached to the arm main body 16, the first hose 40 is held by the first hose holding portion 70 provided in the first nozzle 44, and the third nozzle The second system hose 42 is held by the second hose holding part 118 provided in 48. That is, a hose holding part is set for each hose. For this reason, the routing state of the first system hose 40 and the second system hose 42 are not complicated by the turning operation of the wiper arm 12, and the stable routing state can be maintained. Moreover, the second hose holding part 82 provided in the first nozzle 44 and holding the second system hose 42 is provided integrally with the first hose holding part 70 holding the first system hose 40. Therefore, the number of parts can be reduced as compared with a configuration in which a hose holding portion is provided separately for each hose.

  In the wiper arm 12 according to the present embodiment, the first nozzle 44 is disposed on the middle side in the longitudinal direction of the arm body 16, and the second nozzle 46 is disposed on the distal end side of the arm body 16. Therefore, the cleaning liquid 84 is sprayed from two locations on the wiper arm 12 in the longitudinal direction and on the distal end side by the first nozzle 22 and the 22nd nozzle 46 connected to hoses of different systems. Therefore, in the vehicle equipped with the vehicle wiper device 10 using the wiper arm 12, the cleaning liquid 84 is sufficiently supplied also to the longitudinal base end side of the wiper blade 14. Moreover, the cleaning liquid 84 that has landed on the base end side in the longitudinal direction of the wiper blade 14 is spread widely in the longitudinal direction of the wiper arm 12 by the traveling wind. For this reason, the cleaning liquid 84 spreads in the longitudinal direction of the wiper blade 14, and the wiping performance is improved.

  Further, in the wiper arm 12 according to the present embodiment, the nozzle portion 80 is integrally provided in the first hose holding portion 70 which is a part of the hose holding portion, so that the nozzle is provided in one component (first nozzle 44). And the function of holding two hoses are integrated. For this reason, it leads to a reduction in the number of parts and contributes to cost reduction.

  In addition, according to the wiper arm 12 according to the present embodiment, the first system hose 40 is firmly held in the arm body 16 by connecting the first system hose 40 to the first hose holding portion 70. . On the other hand, the second hose holding part 82 extends from the first hose holding part 70 and forms a space part 100 with the inner wall surface of the arm body 16. Then, the second system hose 42 is arranged in the space portion 100, whereby the second system hose 42 is held in the arm body 16 (separately from the first system hose 40). Therefore, the second system hose 42 can move somewhat in the space 100 (for example, in the longitudinal direction of the second system hose 42). Accordingly, it is difficult to apply a load to the second nozzle 46, the posture of the second nozzle 46 is stabilized, and the landing point of the cleaning liquid 84 ejected from the tip ejection hole 102 is difficult to shift. The above-described effect can be obtained in the same manner with the third nozzle 48 having the same hose holding structure as the first nozzle 44.

  Further, the wiper arm 12 according to the present embodiment is engaged with a first engaged portion 78 formed on one side wall portion 16 </ b> A of the arm body 16 on the outer side in the arm width direction of the first nozzle 44. An engagement portion 76 is formed, and the second hose holding portion 82 is engaged with a second engaged portion 98 formed on the other side wall portion 16B of the arm body 16 on the outer side in the arm width direction. A second engagement portion 96 is formed, and the second hose holding portion 82 is configured to be elastically deformable in the extending direction. For this reason, as an example, the first nozzle 44 is assembled to the intermediate side of the arm body 16 as follows. First, the first engaging portion 76 is engaged with a first engaged portion 78 formed on one side wall portion 16 </ b> A on the intermediate side of the arm body 16. Next, the second engagement portion 96 is formed on the other side wall portion 16B of the arm body 16 while the second hose holding portion 82 is elastically deformed (contracted) in the extending direction. The joint 98 is engaged. As a result, the first hose holding portion 82 is elastically restored, and the elastic restoring force acts as a force for engaging the second engaging portion 96 with the second engaged portion 98. As described above, according to the present embodiment, the first nozzle 44 can be mounted in the arm main body 16 with one touch, and after the first nozzle 44 is mounted on the arm main body 16, body vibration or pulsation during supply of cleaning liquid For example, the first nozzle 44 is prevented from being carelessly detached from the arm body 16. The above-described effect can be obtained in the same manner with the third nozzle 48 having the same fixing structure as the first nozzle 44.

  Furthermore, in the wiper arm 12 according to the present embodiment, a second nozzle 46 and a third nozzle 48 that are different in the spraying direction of the cleaning liquid 84 are disposed on the distal end side in the longitudinal direction of the arm body 16. The third nozzle 48 and the first nozzle 44 are connected to each other by an intermediate downstream hose 54 and a tip end hose 56 that form the same system as the intermediate upstream hose 52. For this reason, when the cleaning liquid 84 is supplied to the first system hose 40, the cleaning liquid 84 is ejected from the two locations of the first nozzle 44 and the third nozzle 48. Further, when the cleaning liquid 84 is supplied to the second system hose 42, the cleaning liquid 84 is ejected from the second nozzle 46. As described above, in the present embodiment, the cleaning liquid 84 is sprayed from a total of three locations including one central portion in the longitudinal direction of the arm body 16 and two distal ends with two systems of hoses. Therefore, only when the arm body 16 reciprocally rotates in one direction, for example, when the wiper arm 12 moves backward, the cleaning liquid 84 is ejected from the first nozzle 44 and the third nozzle 48. If a large amount of the cleaning liquid 84 is sprayed, the cleaning liquid is disposed on the base end side of the wiper blade 14 when the wiper blade 14 is in the middle of wiping (the longitudinal direction of the wiper blade 14 is positioned in the longitudinal direction of the vehicle). Since the cleaning liquid 84 can be extended widely along the longitudinal direction of the wiper arm 12 by jetting 84 and traveling wind, the cleaning liquid 84 can be efficiently jetted. Thereby, the cleaning liquid 84 to be used can be reduced.

  Further, in the wiper arm 12 according to the present embodiment, a lateral bending portion 28 that bends to one side in the arm width direction is formed on the distal end side in the longitudinal direction of the arm body 16, and the other side in the arm width direction of the lateral bending portion 28 is formed. The third nozzle 48 is disposed on one side wall portion 16A located at the position. For this reason, the wiper blade 14 does not become an obstacle, and the cleaning liquid 84 can be easily sprayed immediately before the wiper blade 14. For this reason, the sprayed cleaning liquid 84 can be immediately wiped off by the wiper blade 14, and obstruction of the driving field of view due to the landing cleaning liquid 84 can be prevented.

  Further, in the wiper arm 12 according to the present embodiment, the wiper blade 14 is positioned on one side in the arm width direction with respect to the arm body 16 by the lateral bending portion 28 on the distal end side in the longitudinal direction of the arm body 16. In addition, since the first nozzle 44 and the third nozzle 48 are set so that the intermediate injection hole 86 and the tip injection hole 116 are directed so as to inject the cleaning liquid 84 in the opposite directions with respect to the arm body 16, The injection direction of the cleaning liquid 84 injected from the intermediate injection hole 86 of the one nozzle 44 and the injection direction of the cleaning liquid 84 injected from the tip injection hole 116 of the third nozzle 48 are opposite to the arm body 16. Therefore, the cleaning liquid 84 supplied to the first system hose 40 is always sprayed in the opposite direction to the arm body 16, but the cleaning liquid 84 sprayed from the intermediate spray hole 86 of the first nozzle 44 and the first The cleaning liquid 84 ejected from the tip ejection holes 116 of the three nozzles 48 can be landed on the same side with respect to the wiper blade 14.

  As described above, according to the vehicle wiper device 10 including the wiper arm 12 according to the present embodiment, two systems of hoses such as the first system hose 40 and the second system hose 42 are arranged in the arm body 16. When the countermeasure is taken, a stable hose arrangement state can be maintained, and the number of parts can be suppressed.

  In addition, the vehicle wiper device 10 according to the present embodiment is configured so that the cleaning liquid 84 is selectively sprayed to the first system hose 40 and the second system hose 42 so that the cleaning liquid 84 is sprayed to the wiping direction progression side of the wiper blade 14. 84 has a switching mechanism for switching the supply of 84. For this reason, since the sprayed cleaning liquid 84 is immediately wiped off by the wiper blade 14, it is prevented that the cleaning liquid 84 that has landed is left for a relatively long time until it is wiped off.

(Supplementary explanation of the above embodiment)

(1) The correspondence between the components of the present embodiment and the components of the present invention will be supplementarily described below.

  The “hose holding part” in the present invention is applied to both the first nozzle 44 and the third nozzle 48. In the first nozzle 44, the first hose holding portion 70 and the second hose holding portion 82 correspond to the “hose holding portion” in the present invention, and in the third nozzle 48, the fourth hose connecting portion 48B and The second hose holding portion 118 corresponds to the “hose holding portion” in the present invention. The fourth hose connection portion 48B of the third nozzle 48 is also a “first hose holding portion” in the present invention. As described above, in the present embodiment, the hose holding portions are set in the wiper arm 12 at the two locations of the first nozzle 44 and the third nozzle 48, but the present invention is not limited to this, and either one or three or more locations may be set. May be.

(2) In this embodiment described above, the arm body 16 is formed in a U-shaped cross section over the entire length in the longitudinal direction. However, in the present invention, a part of the arm body in the longitudinal direction (for example, the tip) Although the portion is not U-shaped in cross section, a form formed in a U-shaped cross section as a whole is also included. The “cross-sectional shape is U-shaped” of the present invention includes those having a substantially U-shape in addition to the U-shaped cross-sectional shape.

(3) In the above-described embodiment, when the first nozzle 44 is taken as an example, the nozzle portion 80 is integrally provided in a “hose holding portion” including the first hose holding portion 70 and the second hose holding portion 82. However, the present invention is not limited to this, and the nozzle part may be set separately from the hose holding part. In the present invention, “the first nozzle portion is integrally provided in the hose holding portion” means that the first nozzle portion is a hose in addition to the form in which the first nozzle portion is integrally formed in the hose holding portion. A form in which the first nozzle part is formed separately from the holding part and attached to the hose holding part with an adhesive, a screw, a fitting structure, or the like is also included.

(4) In the above-described embodiment, the first nozzle 44 and the third nozzle 48 are connected to the first system hose 40. However, the present invention is not limited to this. The length may be set to the same length as the two systems of hoses, and the nozzles may be disposed only on the tip side, or the first system of hoses 40 may be disposed only on the intermediate side. . That is, it is sufficient that two systems of hoses are arranged in the arm body, and whether or not the hoses of each system are divided and the number of divisions are appropriately set in consideration of productivity and the like.

(5) In the present embodiment described above, the configuration in which the ejection switching control of the cleaning liquid 84 is performed at the upper switching position before the reversal position and the lower switching position before the stop position is not limited to this. The present invention may be applied to a vehicle wiper device that does not employ control.

DESCRIPTION OF SYMBOLS 10 ... Wiper apparatus for vehicles, 12 ... Wiper arm, 14 ... Wiper blade, 16 ... Arm main body, 16A ... One side wall part, 16B ... The other side wall part, 26 ...・ Pivot shaft, 28... Horizontal bending portion, 40... First system hose, 42... Second system hose, 46 A... Nozzle part (second nozzle part), 48 B. 4 hose connection part (first hose holding part), 48C ... nozzle part (third nozzle part), 70 ... first hose holding part (hose holding part), 76 ... first engaging part, 78 ... 1st engaged part, 80 ... Nozzle part (first nozzle part), 82 ... 2nd hose holding part (hose holding part), 84 ... Cleaning fluid, 86 ... Intermediate Injection hole, 96 ... second engaging part, 98 ... second engaged part, 100 ... space part, 102 ... tip Injection hole, 116... Tip injection hole, 118... Second hose holding part (hose holding part), 124... Third engagement part (first engagement part), 126. Engagement portion (first engaged portion), 134... Fourth engagement portion (second engagement portion), 136... Fourth engaged portion (second engagement portion), S. .. wiped surface, cam plate cp (switching mechanism), coil L (switching mechanism), first washer pump PM1 (switching mechanism), second washer pump PM2 (switching mechanism).

Claims (9)

An arm body having a U-shaped cross section in a direction perpendicular to the arm longitudinal direction;
A first nozzle part disposed on the middle side in the longitudinal direction of the arm body and provided with a cleaning liquid injection hole;
A first injection hole is provided on the distal end side in the longitudinal direction of the arm body, and includes an injection hole for injecting the cleaning liquid toward a position different from the landing point of the cleaning liquid injected from the injection hole of the first nozzle portion. 2 nozzle parts,
The cleaning liquid is sprayed toward a position different from the landing point of the cleaning liquid sprayed from the spray hole of the second nozzle section, and is disposed on the distal end side of the arm body in the longitudinal direction from the first nozzle section. A third nozzle portion having an injection hole to be
A first system hose housed in the arm body and connected to the first nozzle part;
A second system hose accommodated in the arm body in a state aligned with the first system hose and connected to the second nozzle portion;
A first hose holding part that is attached to the arm body and holds the first system hose, and a second hose holding part that is provided integrally with the first hose holding part and holds the second system hose. And a hose holding part provided with,
Have
The third nozzle portion is connected to the first system hose,
A lateral bending portion that bends to one side in the arm width direction is formed at the distal end side in the longitudinal direction of the arm body, and the third nozzle portion is formed on a side wall portion that is located on the other side in the arm width direction of the lateral bending portion. Is placed,
Wiper arm. An arm body having a U-shaped cross section in a direction perpendicular to the arm longitudinal direction;
A first nozzle part disposed at a predetermined position in the longitudinal direction of the arm body and provided with a cleaning liquid injection hole;
In addition to being disposed at a predetermined position in the longitudinal direction of the arm body, an injection hole is provided for injecting the cleaning liquid toward a position different from the landing point of the cleaning liquid injected from the injection hole of the first nozzle portion. A second nozzle part;
A first system hose housed in the arm body and connected to the first nozzle part;
A second system hose accommodated in the arm body in a state aligned with the first system hose and connected to the second nozzle portion;
A first hose holding part that is attached to the arm body and holds the first system hose, and a second hose holding part that is provided integrally with the first hose holding part and holds the second system hose. And a hose holding part provided with,
Have
The first hose holding portion holds the first system hose in the arm body by connecting the first system hose.
The second hose holding part extends from the first hose holding part to form a space part with the inner wall surface of the arm body, and the second system hose is routed in the space part. By holding the second system hose in the arm body,
Wiper arm. An arm body having a U-shaped cross section in a direction perpendicular to the arm longitudinal direction;
A first nozzle part disposed at a predetermined position in the longitudinal direction of the arm body and provided with a cleaning liquid injection hole;
In addition to being disposed at a predetermined position in the longitudinal direction of the arm body, an injection hole is provided for injecting the cleaning liquid toward a position different from the landing point of the cleaning liquid injected from the injection hole of the first nozzle portion. A second nozzle part;
A first system hose housed in the arm body and connected to the first nozzle part;
A second system hose accommodated in the arm body in a state aligned with the first system hose and connected to the second nozzle portion;
A first hose holding part that is attached to the arm body and holds the first system hose, and a second hose holding part that is provided integrally with the first hose holding part and holds the second system hose. And a hose holding part provided with,
Have
On the outer side in the arm width direction of the first hose holding part, a first engagement part that is engaged with a first engaged part formed on one side wall part of the arm body is formed,
On the outer side in the arm width direction of the second hose holding part, a second engaging part that is engaged with a second engaged part formed on the other side wall part of the arm body is formed,
Furthermore, the second hose holding part is configured to be elastically deformable in the extending direction.
Wiper arm. The first nozzle part is integrally provided in the hose holding part,
The wiper arm according to any one of claims 1 to 3. A third nozzle part having an injection hole for injecting the cleaning liquid toward a position different from the landing point of the cleaning liquid injected from the injection hole of the second nozzle part is provided at the longitudinal end side of the arm body. Arranged,
The third nozzle portion and the first nozzle portion are communicated with each other by the first system hose,
The wiper arm according to claim 4 , wherein the wiper arm refers to claim 2, claim 3, or claim 2 or claim 3 . On the distal end side in the longitudinal direction of the arm body, a lateral bending portion that is bent to one side in the arm width direction is formed,
Furthermore, the third nozzle part is disposed on the side wall part located on the other side in the arm width direction of the lateral bending part.
The wiper arm according to claim 5. The first nozzle part and the third nozzle part have their respective injection holes oriented so as to inject cleaning liquid in opposite directions to the arm body.
The wiper arm according to claim 1 or 6. A pivot shaft that rotates around an axis by receiving a driving force;
The wiper arm according to any one of claims 1 to 7, wherein a base end portion is fixed to the pivot shaft and reciprocates along a surface to be wiped.
A wiper blade attached to the tip of the wiper arm and wiping the surface to be wiped;
Wiper apparatus for vehicles provided with.   9. The vehicle according to claim 8, further comprising a switching mechanism that selectively switches the supply of the cleaning liquid to the first system hose and the second system hose so that the cleaning liquid is sprayed toward the wiping direction of the wiper blade. Wiper device.

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