JP2020019294A - Connection structure of wiper arm - Google Patents

Abstract

To provide a connection structure of a wiper arm which can correspond to a plurality of types of wiper blades of which lengths are different.SOLUTION: A connection structure of a wiper arm includes: a wiper arm; an adapter 15 which is fixed to a selective position in a longer direction X of an arm shank 12 for structuring the wiper arm; and a blade holding member which engages with the adapter 15 and holds the wiper blade. As a plurality of fixing parts of the adapter 15 are arranged on the arm shank 12, the adapter 15 can be fixed to the selective position in the longer direction X of the arm shank 12, and one type of the wiper arm can be required to be mounted on a plurality of types of wiper blades of which lengths are different.SELECTED DRAWING: Figure 15

Description

  The present invention relates to a connection structure between a blade holding member for holding a wiper blade and a wiper arm.

  BACKGROUND ART A vehicle such as an automobile is equipped with a wiper device. The wiper device includes a wiper motor that is a driving source, a wiper arm that is swung by driving the wiper motor, and a wiper blade that is mounted on a tip end side of the wiper arm. The wiper blade is held by a blade holding member, and the blade holding member is connected to the wiper arm. By driving the wiper motor, the wiper blade performs a reciprocating wiping operation on a wiping surface of a window glass of an automobile or the like.

  Patent Document 1 discloses a connection structure between a wiper arm and a wiper blade. Patent Document 1 discloses that a cylindrical portion forming a connecting shaft can be set in a retaining position or a detachable position by swinging a lever member that swings with respect to a holding member that holds a blade rubber. . It is disclosed that the design of the wiper blade can be improved when the cylindrical portion takes a retaining position, and that the attaching / detaching operation can be easily performed without applying force when the cylindrical portion takes the attaching / detaching posture.

JP-A-2015-214181

  However, in the connection structure of the wiper arm and the wiper blade described in Patent Document 1, assembling of the wiper arm and the wiper blade, the two are connected at one location.

  Therefore, when the length of the wiper blade changes, the position of the connecting portion on the shank side also changes, and when the connecting point is set to one place, it is necessary to change the shape of the shank side for each length of the wiper blade There is a problem that there is.

  An object of the present invention is to provide a connection structure of a wiper arm that can support a plurality of types of wiper blades having different lengths.

  One aspect of the present invention is a connection structure of a wiper arm that detachably connects a blade holding member to a wiper arm, and relates to the wiper arm, a connection member fixed to an arm shank constituting the wiper arm, and the connection member. And a blade holding member that holds the wiper blade. The connection member is located between the arm shank and the blade holding member, the arm shank includes a plurality of connection engagement portions capable of fixing the connection member, and each of the plurality of connection engagement portions Are spaced from each other along the longitudinal direction of the arm shank.

  In another aspect of the present invention, the arm shank includes a pair of opposed inner wall surfaces, the plurality of connection engagement portions are formed on each of the pair of inner wall surfaces, and the connection member includes the plurality of connection members. It is fixed to any of the coupling engagement portions.

  In another aspect of the present invention, the plurality of connection engagement portions are provided at equal intervals.

  In another aspect of the present invention, the connection member is fixed to the arm shank by fitting a part of the connection member and the connection engagement portion.

  In another aspect of the present invention, the connection member has a protruding portion formed with a claw portion, and the connection engagement portion is a concave portion formed on the inner wall surface of the arm shank; The protruding portion is arranged in the inside, and the connecting member is fixed by engagement of the claw portion and a wall portion forming the concave portion.

  In another aspect of the present invention, the connection member includes a protrusion protruding from a side surface of the connection member, and the connection engagement portion is a recess formed on the inner wall surface of the arm shank; The connection member is fixed by the fitting between the projection and the projection.

  ADVANTAGE OF THE INVENTION According to this invention, since the connection member which connects the arm shank of a wiper arm and a blade holding member was provided, it is possible to fix a blade holding member via a connection member in several places in the longitudinal direction of an arm shank. Thus, one type of wiper arm can be attached to a plurality of types of wiper blades having different lengths. That is, it is possible to provide a wiper arm connection structure that can handle a plurality of types of wiper blades having different lengths.

It is a perspective view showing the connection structure of the wiper arm of the present invention. FIG. 2 is a perspective view showing a wiper arm used in the connection structure of the wiper arm of FIG. 1. FIG. 3 is a perspective view illustrating a structure of an arm shank of the wiper arm of FIG. 2. It is sectional drawing cut | disconnected along the AA line of FIG. FIG. 2 is a perspective view illustrating a connecting member according to the first embodiment that is incorporated in the connecting structure of the wiper arm of FIG. 1. It is a top view of the connection member of FIG. FIG. 3 is a cross-sectional view illustrating a joint structure between an arm shank and a connecting member, taken along line AA of FIG. 2. FIG. 4 is a perspective view illustrating a method of fixing a connecting member in the connecting structure of the wiper arm according to the first embodiment. FIG. 4 is a partial perspective view illustrating an engagement structure between a connection member and a blade holding member in the connection structure of the wiper arm according to the first embodiment. (A) is a perspective view of a wiper arm having a long wiper blade, and (b) is a plan view showing a wiping area by the wiper blade of (a). (A) is a perspective view of a wiper arm having a short wiper blade, and (b) is a plan view showing a wiping area by the wiper blade of (a). FIG. 13 is a perspective view illustrating a structure of an arm shank of a wiper arm according to a second embodiment. FIG. 13 is a perspective view showing a connecting member incorporated in a wiper arm connecting structure according to a second embodiment. FIG. 13 is a partial perspective view illustrating a method of attaching a connection member in the wiper arm connection structure according to the second embodiment. FIG. 10 is a partial perspective view illustrating details of a mounting structure of a connecting member according to a second embodiment. FIG. 13 is a partial perspective view showing an engagement structure between a connection member and a blade holding member in a connection structure for a wiper arm according to the second embodiment. FIG. 13 is a perspective view illustrating a structure of an arm shank of a wiper arm according to a third embodiment. FIG. 13 is a perspective view illustrating a connecting member incorporated in a wiper arm connecting structure according to a third embodiment; FIG. 15 is a perspective view illustrating a method of mounting a connection member in the wiper arm connection structure according to the third embodiment. FIG. 13 is a partial side view illustrating a method of press-fitting the connecting member according to the third embodiment. FIG. 15 is a partial perspective view showing a structure after mounting the connecting member according to the third embodiment in a partially broken manner. FIG. 13 is a partial perspective view illustrating an engagement structure between a connection member and a blade holding member in a connection structure of a wiper arm according to a third embodiment.

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

(Embodiment 1)
FIG. 1 is a perspective view showing a connection structure of a wiper arm according to the present invention.

  The connection structure of the wiper arm 22 shown in FIG. 1 forms a rear wiper device (not shown) for wiping a wiping surface of a rear glass (see FIG. 10) 11 provided on a vehicle such as an automobile, for example. The connection structure of the wiper arm 22 includes an elongated arm shank 12 that constitutes the wiper arm 22, an adapter (connection member) 13, and a blade holding member 14 that holds the wiper blade 10. The wiper arm 22 includes an arm shank 12 and an arm head 21 that rotatably supports the arm shank 12.

  The wiper blade 10 is rotatably connected to a portion extending from near the center of the arm shank 12 in the longitudinal direction X to near the distal end, and a wiper motor forming the rear wiper device is provided at the base end of the wiper arm 22. (Not shown) is fixed.

  Then, by turning on a wiper switch provided in a vehicle interior or the like, the output shaft of the wiper motor rotates in forward and reverse directions, and the wiper arm 22 swings. As a result, the blade rubber 20 performs a reciprocating wiping operation in a predetermined wiping range on the rear glass 11, thereby wiping rain water or the like attached to the wiping surface of the rear glass 11.

  The wiper arm 22 is formed in a rod shape by injection-molding a resin material such as plastic, and the tip end side of the wiper arm 22 is formed thinner than the base end side. More specifically, the wiper arm 22 is formed in a tapered shape that gradually becomes thinner from its base end toward its tip. Thereby, the design of the wiper arm 22 is improved.

  The wiper arm 22 and the blade holding member 14 are connected via an adapter 13 which is a connecting member. That is, the adapter 13 is fixed at a predetermined position in the longitudinal direction X of the arm shank 12 of the wiper arm 22, and is located between the arm shank 12 and the blade holding member 14. The blade holding member 14 is rotatably and detachably engaged with the adapter 13.

  The blade holding member 14 holds the wiper blade 10 provided with the blade rubber 20 so as to grip the wiper blade 10.

  Further, a pressing force acts on the arm shank 12 of the wiper arm 22 in a direction of tilting the arm shank 12 toward the rear glass 11. There is no such thing as falling off. The pressing force is generated by the spring force of a tension spring 19 provided on the base end side of the arm shank 12.

  Here, the arm shank 12 is provided with a connection engaging portion capable of fixing the adapter 13 at any position in the longitudinal direction X of the arm shank 12. Therefore, in the connection structure of the wiper arm 22 according to the first embodiment, the adapter 13 fixed at a predetermined position in the longitudinal direction X of the arm shank 12 of the elongated wiper arm 22 should be fixed at an arbitrary position in the longitudinal direction X. Can be.

  The structure of the arm shank used in the connection structure of the wiper arm according to the first embodiment will be described with reference to FIGS. 2 is a perspective view showing a wiper arm used in the connection structure of the wiper arm of FIG. 1, FIG. 3 is a perspective view showing the structure of an arm shank of the wiper arm of FIG. 2, and FIG. 4 is a sectional view taken along line AA of FIG. FIG.

  The cross section of the arm shank 12 of the wiper arm 22 taken along a Y direction orthogonal to the longitudinal direction X of the arm shank 12 shown in FIG. 2 is substantially U-shaped as shown in FIG. The arm shank 12 has a pair of inner wall surfaces 12a facing each other. The inner wall surface 12a of the arm shank 12 is formed with the above-mentioned connection engaging portion that engages with the adapter (connection member) 13. As shown in FIG. 7 described later, the U-shaped opening side (FIG. The adapter 13 is attached to the lower side of the adapter 13).

  Note that the connection engagement portion of the first embodiment is a rail portion 12b formed to protrude inward from the inner wall surface 12a of the arm shank 12 shown in FIG. They are formed continuously along the longitudinal direction X. That is, as shown in FIGS. 3 and 4, the cross-sectional shape is U-shaped, and the rail portion 12b is continuously formed on both of the pair of opposed inner wall surfaces 12a. In other words, the rail portion 12b Is a guide portion when the adapter 13 moves along the longitudinal direction X. In addition, the rail portions 12b are formed in two stages vertically when the U-shaped opening side is the lower side.

  Next, the structure of the adapter (connection member) 13 attached to the arm shank 12 will be described with reference to FIGS. FIG. 5 is a perspective view showing the connecting member of the first embodiment incorporated in the connecting structure of the wiper arm of FIG. 1, and FIG. 6 is a plan view of the connecting member of FIG.

  The adapter 13 shown in FIG. 5 is engaged with the arm shank 12 shown in FIG. 2 and is slidable in the longitudinal direction X inside the wiper arm 22. That is, in the structure shown in FIG. 5, if the opposed inner wall surface 12a of the arm shank 12 in FIG. A protruding portion 13a that engages with the lower rail portion 12b of 12a is provided.

  As shown in FIGS. 5 and 6, the adapter 13 is provided with a protruding portion (part) 13b formed with a gap from the protruding portion 13a, as shown in FIGS. On each side surface of the adapter 13 of the first embodiment, two protruding portions 13b are provided at the same height.

  When the adapter 13 is mounted on the arm shank 12, the left and right convex portions 13a of the adapter 13 are guided by the lower rail portion 12b provided on the inner wall surface 12a of the arm shank 12, and the convex portion 13a Is engaged with the rail portion 12b so that the adapter 13 can slide on the rail portion 12b.

  A circular notch 13c is formed below the protrusion 13a on both side surfaces of the adapter 13. The notch 13c is provided below the protrusion 13a on both side surfaces of the adapter 13. The blade holding member 14 for holding the wiper blade 10 shown in FIG. 1 is rotatably fitted into the notch 13c.

  When the adapter 13 is mounted on the arm shank 12, as shown in FIG. 7 described later, the lower rail portion 12b of the arm shank 12 is arranged between the convex portion 13a and the protruding portion 13b of the adapter 13. .

  Next, a method of attaching the adapter 13 to the wiper arm 22, a method of fixing the adapter 13, and a structure after attaching the wiper blade will be described with reference to FIGS. FIG. 7 is a cross-sectional view showing a joint structure of the arm shank and the connecting member cut along the line AA in FIG. 2, and FIG. 8 is a perspective view showing a method of fixing the connecting member in the wiper arm connecting structure of the first embodiment. FIG. 9 is a partial perspective view showing an engagement structure of the connection member and the blade holding member in the connection structure of the wiper arm according to the first embodiment.

  When attaching the adapter 13 to the arm shank 12 of the wiper arm 22, first, as shown in FIG. 8, the fixing jig 17 is attached to a position where the adapter 13 is fixed in the arm shank 12. Then, in this state, the adapter 13 is attached from the opening below the arm shank 12 (part P1 in FIG. 8), and the left and right protruding portions 13b of the adapter 13 are provided on the inner wall surface 12a of the arm shank 12. It is guided by the rail portion 12b on the side (the upper side in FIG. 8). At this time, the protruding portion 13b of the adapter 13 is slid on the rail portion 12b. Further, the position of the adapter 13 in the longitudinal direction X of the arm shank 12 is determined by the fixing jig 17 by abutting the adapter 13 on the fixing jig 17, and in this state, as shown in the N section of FIG. The rail portion 12b of the arm shank 12 and the protruding portion (part) 13b of the adapter 13 are fixed by thermal caulking.

  That is, the protruding portion 13b of the adapter 13 and the rail portion 12b of the arm shank 12 are welded by thermal caulking, and the adapter 13 is fixed at a desired position in the longitudinal direction X of the arm shank 12. Thereby, a welded portion is formed at the N portion.

  After welding, the fixing jig 17 is removed from the arm shank 12.

  Then, the blade holding member 14 is attached to the adapter 13 attached to the arm shank 12 as shown in FIG. At this time, the wiper blade 10 provided with the blade rubber 20 is attached to the blade holding member 14. When attaching the blade holding member 14 to the adapter 13, the protrusion 14 a of the blade holding member 14 is fitted into the notch 13 c of the adapter 13. Thereby, the blade holding member 14 is engaged with the adapter 13. At this time, since the protrusion 14a of the blade holding member 14 and the cutout 13c of the adapter 13 are circular, the blade holding member 14 is rotatably attached to the adapter 13.

  Here, materials for forming each of the arm shank 12, the adapter 13, and the blade holding member 14 will be described. The arm shank 12 is, for example, PET (polyethylene terephthalate), the adapter 13 is, for example, PBT (polybutylene terephthalate), and the blade holding member 14 is, for example, POM (polyacetal). However, the material of each of the above members is not limited to the above materials.

  According to the connection structure of the wiper arm 22 according to the first embodiment, the adapter 13 that connects the arm shank 12 of the wiper arm 22 and the blade holding member 14 is provided, so that the arm shank 12 is provided at a plurality of positions in the longitudinal direction X. The adapter 13 can be fixed.

  Accordingly, one type of wiper arm 22 can be attached to a plurality of types of wiper blades 10 having different lengths. That is, it is possible to provide a connection structure of the wiper arm 22 that can support a plurality of types of wiper blades 10 having different lengths.

  In the connecting member of the wiper arm 22 according to the first embodiment, the adapter 13 can be fixed at an arbitrary position in the longitudinal direction X of the arm shank 12. The blade holding member 14 can be fixed. That is, the wiper blade 10 can be fixed to the arm shank 12 at any position.

  In the connection structure of the wiper arm 22 according to the first embodiment, the adapter 13 for connecting the arm shank 12 of the wiper arm 22 and the blade holding member 14 is provided, so that the structure of the arm shank 12 is simplified. Can be. Specifically, by giving the accuracy of the sliding portion in the connection structure of the wiper arm 22 to the adapter side, the structure of the wiper arm 22 on the shank side can be simplified. That is, in order to increase the swing accuracy of the arm shank 12, the machining accuracy of the adapter 13 itself may be further increased. By increasing the processing accuracy of the adapter 13, the processing accuracy of the arm shank 12 does not need to be increased more than necessary, and the structure of the arm shank 12 can be simplified. Further, when the arm shank 12 is processed by molding, the arm shank 12 has a simple structure, so that the arm shank 12 can be easily formed by molding. Further, the adapter 13 can be made of a material having high slidability, and the reliability of the unit of the wiper arm 22 including the adapter 13 can be maintained for a long time.

  Here, FIG. 10A is a perspective view of a wiper arm 22 having a long wiper blade 10a, and FIG. 10B is a plan view showing a wiping area 18a by the wiper blade 10a of FIG. 10A. 11A is a perspective view of a wiper arm 22 having a short wiper blade 10b, and FIG. 11B is a plan view showing a wiping area 18b by the wiper blade 10b of FIG. 11A.

  Since the length of the wiper blade 10a shown in FIG. 10 is longer than the wiper blade 10b shown in FIG. 11, the area of the wiping area 18a, 18b The area is larger than the area of the wiping area 18b wiped by the wiper blade 10b.

  By adopting the connection structure of the wiper arms 22 of the first embodiment even for the wiper blades 10 having different lengths as described above, one type of the wiper arm 22 that can be attached can be used.

  Further, according to the connection structure of the wiper arm 22 of the first embodiment, the position of the wiper blade 10 can be freely changed by a layout of parts based on variations in the length of the wiper blade 10. Thereby, the wiper arm 22, the adapter 13, and the blade holding member 14 can be used as standard parts.

  Further, since the rail portion (connection engaging portion) 12b of the arm shank 12 is formed continuously in the longitudinal direction X of the arm shank 12, an optimal mounting position of the wiper blade 10 is set for each type of automobile. It becomes possible.

  In addition, by fixing the arm shank 12 and the adapter 13 by thermal caulking, the fixed position of the adapter 13 does not shift at the time of replacement of the wiper blade 10 or the like, thereby preventing the user from deteriorating workability. it can. Furthermore, since no member such as a screw is used for fixing the adapter 13 to the arm shank 12, an increase in the number of parts can be suppressed.

(Embodiment 2)
The connection structure of the wiper arm according to the second embodiment will be described. The connection structure of the wiper arm according to the second embodiment forms a rear wiper device (not shown) for wiping a wiping surface of a rear glass 11 shown in FIG. 10 provided in a vehicle such as an automobile, similarly to the first embodiment. I do.

  Further, the connection structure of the wiper arm according to the second embodiment uses the arm shank 12 shown in FIG. 12 and the adapter (connection member) 15 shown in FIG. 13 in the connection structure of the wiper arm 22 shown in FIG. . Since the operation method of the wiper arm 22 (see FIG. 1) is the same as the operation method of the wiper arm 22 of the first embodiment, the description is omitted.

  In the connection structure of the wiper arm 22 according to the second embodiment, the adapter 15 can be fixed at a selective position in the longitudinal direction X of the elongated arm shank 12 in the longitudinal direction X.

  First, the structure of the wiper arm according to the second embodiment will be described with reference to FIG. FIG. 12 is a perspective view showing the structure of the arm shank in the wiper arm according to the second embodiment.

  The shape of the cross section of the wiper arm 22 of the second embodiment cut along the Y direction orthogonal to the longitudinal direction X of the arm shank 12 is substantially U-shaped, similar to the structure of FIG. 4 of the first embodiment. Has become. The arm shank 12 includes a plurality of connection engagement portions that can fix the adapter 15, and each of the plurality of connection engagement portions is provided at an interval along the longitudinal direction X of the arm shank 12. ing. Each of a pair of opposed inner wall surfaces 12a of the arm shank 12 is formed with the plurality of connection engagement portions that engage with an adapter (connection member) 15 illustrated in FIG. 13 described later. As shown in FIG. 14, the adapter 15 is mounted from the U-shaped opening side, and the adapter 15 is fixed to any of the plurality of coupling engagement portions.

  As shown in FIG. 12, the connection engagement portions of the wiper arm 22 according to the second embodiment are a plurality of recesses 12 c formed on the inner wall surfaces 12 a on both sides (a pair) of the arm shank 12. The plurality of recesses 12c are formed along the longitudinal direction X of the arm shank 12. When viewed from the U-shaped opening side of the arm shank 12, irregularities are formed at equal intervals on each of the inner wall surfaces 12a on both sides. In other words, a plurality of recesses 12c are formed at equal intervals on each inner wall surface 12a. A protruding portion (convex portion) 15a of the adapter 15 shown in FIG. 13 described later is fitted (accommodated) into these concave portions 12c. Therefore, in the second embodiment, the concave portion 12c of the arm shank 12 and the protruding portion 15a which is the convex portion of the adapter 15 are fitted, and the adapter 15 is fixed to the arm shank 12 by this fitting.

  Also, since the protruding portions (projections) 15a of the adapter 15 are fitted into the plurality of recesses 12c, the distance T1 between the protruding portions 15a of the adapter 15 and the distance T2 between the adjacent recesses 12c in the arm shank 12 are determined. Are equal (T1 = T2). And it is preferable that the installation intervals of the plurality of concave portions 12c in the arm shank 12 are all equal to T1. That is, the installation intervals (distances T2 between the recesses 12c) of the plurality of recesses 12c in the arm shank 12 are all provided at equal intervals. At this time, T2 = T1. The adapter 15 can be fitted into the concave portion 12c at any position. When a plurality of concave portions 12c are provided at equal intervals, the interval T1 between adjacent concave portions 12c is, for example, 20 mm. Also, as shown in FIG. 12, a concave portion 12c is provided in each of the opposing inner wall surfaces 12a of the arm shank 12 at the same position to oppose each other, and as shown in FIG. The adapter 15 can also be attached to 12c.

  Next, the structure of the adapter (connection member) 15 according to the second embodiment will be described with reference to FIG. FIG. 13 is a perspective view showing a connecting member incorporated in the connecting structure of the wiper arm according to the second embodiment.

  The adapter 15 shown in FIG. 13 engages with the arm shank 12 shown in FIG. 12 and is fixed at a selective position in the longitudinal direction X of the arm shank 12. That is, as shown in FIG. 14, which will be described later, the protruding portion 15a of the adapter 15 is inserted into any of the plurality of recesses 12c of the arm shank 12, and the adapter 15 is attached to the arm shank 12. The position can be determined and further fixed.

  The adapter 15 is provided with protruding portions (convex portions) 15a at four corners on both side surfaces thereof, and further protrudes along both sides from the protruding portions 15a at both ends of each protruding portion 15a. The claw 15b is provided.

  The adapter 15 has a circular notch 15c below the center of both sides. A blade holding member 14 for holding the wiper blade 10 shown in FIG. 1 is rotatably fitted into the notch 15c.

  Next, a method of attaching the adapter 15 to the arm shank 12 and a structure after attaching the wiper blade will be described with reference to FIGS. FIG. 14 is a partial perspective view showing a mounting method of the connecting member in the wiper arm connecting structure of the second embodiment, FIG. 15 is a partial perspective view showing details of the mounting structure of the connecting member of the second embodiment, and FIG. FIG. 13 is a partial perspective view showing an engagement structure between a connection member and a blade holding member in a connection structure for a wiper arm according to a second embodiment.

  When attaching the adapter 15 to the arm shank 12, as shown in FIG. 14, with the opening side of the arm shank 12 facing upward, the four projecting portions 15 a of the adapter 15 are It fits in the concave part 12c of the location. At this time, as shown in FIG. 15, the adapter 15 is securely pushed in until the claw portion 15b of the adapter 15 is caught by the wall portion 12ca forming the concave portion 12c. When the adapter 15 is pushed into the concave portion 12c, the adapter 15 may abut on the inner surface of the arm shank 12. Thereby, the claw portion 15b can be more reliably hooked on the wall portion 12ca.

  As described above, the protruding portion 15a of the adapter 15 is arranged (accommodated) in the concave portion 12c of the arm shank 12, and the claw portion 15b of the adapter 15 is engaged with the wall portion 12ca forming the concave portion 12c to position the adapter 15. , And is fixed to the arm shank 12. That is, the positioning and attachment of the adapter 15 to the arm shank 12 are completed.

  Then, the blade holding member 14 is attached to the adapter 15 attached to the arm shank 12 as shown in FIG. At this time, the wiper blade 10 provided with the blade rubber 20 is attached to the blade holding member 14. When attaching the blade holding member 14 to the adapter 15, the protrusion 14 a of the blade holding member 14 is fitted into the notch 15 c of the adapter 15. Thereby, the blade holding member 14 engages with the adapter 15. At this time, since the projection 14a of the blade holding member 14 and the cutout 15c of the adapter 15 are circular, the blade holding member 14 is rotatably attached to the adapter 15.

  The materials for forming each of the arm shank 12, the adapter 15, and the blade holding member 14 are the same as those described in the first embodiment, and thus redundant description will be omitted.

  According to the connection structure of the wiper arm 22 of the second embodiment, the adapter 15 for connecting the arm shank 12 of the wiper arm 22 and the blade holding member 14 is provided, so that the arm shank 12 is provided at a plurality of positions in the longitudinal direction X. The adapter 15 can be fixed. That is, by providing a plurality of fixing portions of the adapter 15 on the arm shank 12, the adapter 15 can be fixed at a selective position in the longitudinal direction X of the arm shank 12.

  Accordingly, one type of wiper arm 22 can be attached to a plurality of types of wiper blades 10 having different lengths. That is, it is possible to provide a connection structure of the wiper arm 22 that can support a plurality of types of wiper blades 10 having different lengths.

  Further, in the connection structure of the wiper arm 22 according to the second embodiment, the adapter 15 for connecting the arm shank 12 of the wiper arm 22 and the blade holding member 14 is provided as in the first embodiment. Can have a simple structure. Specifically, by giving the accuracy of the sliding portion in the connection structure of the wiper arm 22 to the adapter side, the structure of the wiper arm 22 on the shank side can be simplified. That is, in order to increase the swing accuracy of the arm shank 12, the machining accuracy of the adapter 15 itself may be further increased. By increasing the processing accuracy of the adapter 15, it is not necessary to increase the processing accuracy of the arm shank 12 more than necessary, and the structure of the arm shank 12 can be simplified. Further, when the arm shank 12 is processed by molding, the arm shank 12 has a simple structure, so that the arm shank 12 can be easily formed by molding. Further, the adapter 15 can be made of a material having high slidability, so that the reliability of the unit of the wiper arm 22 including the adapter 15 can be maintained for a long time.

  Further, according to the connection structure of the wiper arm 22 of the second embodiment, the position of the wiper blade 10 can be selectively changed by a component layout based on the variation of the length of the wiper blade 10. Thereby, the wiper arm 22, the adapter 15, and the blade holding member 14 can be used as standard parts.

  Further, since a plurality of fixing portions of the adapter 15 are formed in the longitudinal direction X of the arm shank 12, it is possible to set an optimum mounting position of the wiper blade 10 (adapter 15) for each vehicle type. .

  In addition, by forming the arm shank 12 and the adapter 15 into a concave-convex engagement, the work of attaching the adapter 15 to the arm shank 12 can be easily performed.

  In addition, by fixing the arm shank 12 and the adapter 15 with nails by fitting, the fixed position of the adapter 15 does not shift when exchanging the wiper blade 10 and the like, and deterioration in workability for the user is prevented. be able to. Further, since no member such as a screw is used for fixing the adapter 15 to the arm shank 12, an increase in the number of parts can be suppressed.

(Embodiment 3)
The connection structure of the wiper arm according to the third embodiment will be described. Similar to the first embodiment, the connection structure of the wiper arm according to the third embodiment forms a rear wiper device (not shown) for wiping a wiping surface of a rear glass 11 shown in FIG. 10 provided on a vehicle such as an automobile, for example. I do.

  Further, the connection structure of the wiper arm according to the third embodiment uses the arm shank 12 shown in FIG. 17 and the adapter (connection member) 16 shown in FIG. 18 in the connection structure of the wiper arm 22 shown in FIG. . Since the operation method of the wiper arm 22 (see FIG. 1) is the same as the operation method of the wiper arm 22 of the first embodiment, the description is omitted.

  In the connection structure of the wiper arm 22 according to the third embodiment, the adapter 16 is moved to a selective position in the longitudinal direction X of the arm shank 12 in the longitudinal direction X of the elongated arm shank 12 as in the second embodiment. Can be fixed.

  First, the structure of the wiper arm 22 according to the third embodiment will be described with reference to FIG. FIG. 17 is a perspective view showing the structure of the arm shank of the wiper arm according to the third embodiment.

  The wiper arm 22 of the third embodiment has a cross-sectional shape cut along the Y direction orthogonal to the longitudinal direction X of the arm shank 12 shown in FIG. 17, similar to the structure of FIG. 4 of the first embodiment. It is U-shaped. The arm shank 12 includes a plurality of connection engagement portions that can fix the adapter 16, and each of the plurality of connection engagement portions is provided at an interval along the longitudinal direction X of the arm shank 12. ing. On each of a pair of inner wall surfaces 12a of the arm shank 12 of the wiper arm 22 opposed to each other, the above-mentioned plurality of connection engagement portions which are engaged with an adapter (connection member) 16 shown in FIG. As shown in FIG. 19 described later, the adapter 16 is mounted from the U-shaped opening side (P2 part in FIG. 19), and the adapter 16 is fixed to any of the plurality of coupling engagement portions.

  As shown in FIG. 17, the coupling engagement portions of the wiper arm 22 according to the third embodiment are a plurality of circular concave portions 12d formed on the inner wall surfaces 12a on both sides (a pair) of the arm shank 12. Specifically, the plurality of circular concave portions 12d are formed near the upper end (near the lower end in FIG. 17) of the slide rail 12e formed to protrude inward from the inner wall surface 12a along the longitudinal direction X of the arm shank 12. For example, they are formed at equal intervals. That is, the slide rail 12e formed so as to protrude from the inner wall surface 12a and the plurality of recesses 12d formed at equal intervals near the upper end of the slide rail 12e are formed so as to communicate with each other.

  Then, a convex portion 16a of an adapter 16 shown in FIG. 18 described later is fitted into any of the plurality of concave portions 12d, whereby the adapter 16 is positioned with respect to the arm shank 12 and fixed to the arm shank 12. Is done. Therefore, also in the third embodiment, the concave portion 12d of the arm shank 12 and the convex portion 16a of the adapter 16 are fitted, and the adapter 16 is fixed to the arm shank 12 by this fitting.

  Next, the structure of the adapter (connection member) 16 of the third embodiment will be described with reference to FIG. FIG. 18 is a perspective view showing a connecting member incorporated in the wiper arm connecting structure according to the third embodiment.

  The adapter 16 shown in FIG. 18 engages with the arm shank 12 shown in FIG. 17 and is fixed at a selective position in the longitudinal direction X of the arm shank 12. The adapter 16 has, on both side surfaces, convex portions 16a protruding from the respective side surfaces. The protrusion 16a has a columnar shape. Then, as shown in FIG. 19 to be described later, the adapter 16 was attached from the opening below the arm shank 12 (P2 part in FIG. 19), and left and right convex portions 16a were provided on the inner wall surface 12a of the arm shank 12. It is guided by the slide rail 12e. Furthermore, by fitting (press-fitting) the convex portion 16a of the adapter 16 into the concave portion 12d at a desired position, the position of the adapter 16 with respect to the arm shank 12 can be determined and fixed.

  The adapter 16 is formed with a circular cutout 16b below the protrusion 16a on both sides. A blade holding member 14 for holding the wiper blade 10 shown in FIG. 1 is rotatably fitted into the notch 16b.

  Next, a method of attaching the adapter 16 to the arm shank 12 and a structure after attaching the wiper blade will be described with reference to FIGS. FIG. 19 is a perspective view illustrating a method of mounting the connecting member in the wiper arm connecting structure according to the third embodiment. FIG. 20 is a partial side view illustrating a method of press-fitting the connecting member according to the third embodiment. FIG. 21 is a partially cutaway perspective view showing the structure of the third embodiment after the connection member is mounted, and FIG. 22 is an engagement between the connection member and the blade holding member in the connection structure of the wiper arm according to the third embodiment. It is a partial perspective view showing a structure.

  When mounting the adapter 16 on the arm shank 12, as shown in P2 part of FIG. 19, the adapter 16 is inserted into the arm shank 12 with the opening side of the arm shank 12 facing upward, and thereafter, The adapter 16 is moved along the slide rail 12e, and the projection 16a is fitted into the recess 12d at a desired position as shown in FIG. That is, the convex portion 16a of the adapter 16 is lightly pressed into the concave portion 12d at a desired position of the arm shank 12. That is, the convex portion 16a of the adapter 16 and the concave portion 12d of the arm shank 12 are engaged by press fitting. Thereby, the adapter 16 is positioned on the arm shank 12 and is fixed to the arm shank 12.

  At this time, it is preferable that the distance between the opposed opening portions 12g in the concave portion 12d is smaller than the diameter of the convex portion 16a so as not to easily come off even when a load is applied in the direction in which the convex portion 16a of the adapter 16 comes off. .

  As shown in FIG. 21, a stopper 12 f protruding inward from the ceiling is provided on the ceiling of the inner wall surface 12 a of the arm shank 12. The stopper portion 12f prevents the adapter 16 from dropping in the arm shank 12 at the time of wiping with the wiper arm 22 operated. Therefore, the gap between the stopper portion 12f and the adapter 16 is a small gap that does not allow the adapter 16 to fall off. That is, since the stopper portion 12f is provided on the ceiling of the inner wall surface 12a of the arm shank 12, it is possible to prevent the adapter 16 from dropping out of the concave portion 12d when a load in the S direction is applied to the adapter 16 at the time of wiping. . The stopper portion 12f may be detachably attached with an adhesive or the like after the adapter 16 is attached, or may be formed integrally with the arm shank 12. Further, the stopper portion 12f may be provided to protrude from the side surface of the inner wall surface 12a of the arm shank 12.

  Next, the blade holding member 14 is attached to the adapter 16 attached to the arm shank 12 as shown in FIG. At this time, the wiper blade 10 provided with the blade rubber 20 is attached to the blade holding member 14. When attaching the blade holding member 14 to the adapter 16, the protrusion 14 a of the blade holding member 14 is fitted into the notch 16 b of the adapter 16. Thereby, the blade holding member 14 is engaged with the adapter 16. At this time, since the protrusion 14a of the blade holding member 14 and the cutout 16b of the adapter 16 are circular, the blade holding member 14 is rotatably attached to the adapter 16.

  The materials for forming each of the arm shank 12, the adapter 16, and the blade holding member 14 are the same as those described in the first embodiment, and thus redundant description will be omitted.

  According to the connection structure of the wiper arm 22 of the third embodiment, the adapter 16 for connecting the arm shank 12 of the wiper arm 22 and the blade holding member 14 is provided, so that the arm shank 12 has a plurality of positions in the longitudinal direction X. The adapter 16 can be fixed. That is, by providing a plurality of fixing portions of the adapter 16 on the arm shank 12, the adapter 16 can be fixed at a selective position in the longitudinal direction X of the arm shank 12.

  Accordingly, one type of wiper arm 22 can be attached to a plurality of types of wiper blades 10 having different lengths. That is, it is possible to provide a connection structure of the wiper arm 22 that can support a plurality of types of wiper blades 10 having different lengths.

  Further, in the wiper arm 22 of the third embodiment, the adapter 16 for connecting the arm shank 12 of the wiper arm 22 and the blade holding member 14 is provided similarly to the first embodiment, so that the structure of the arm shank 12 is simplified. It can be structured. Specifically, by giving the accuracy of the sliding portion in the connection structure of the wiper arm 22 to the adapter side, the structure of the wiper arm 22 on the shank side can be simplified. That is, in order to increase the swing accuracy of the arm shank 12, the machining accuracy of the adapter 16 itself may be further increased. By increasing the processing accuracy of the adapter 16, the processing accuracy of the arm shank 12 does not need to be increased more than necessary, and the structure of the arm shank 12 can be simplified. Further, when the arm shank 12 is processed by molding, the arm shank 12 has a simple structure, so that the arm shank 12 can be easily formed by molding. Further, the adapter 16 can be made of a material having high slidability, and the reliability of the unit of the wiper arm 22 including the adapter 16 can be maintained for a long time.

  Further, according to the connection structure of the wiper arm 22 of the third embodiment, the position of the wiper blade 10 can be selectively changed by a layout of parts based on variations in the length of the wiper blade 10. Thereby, the arm shank 12, the adapter 16, and the blade holding member 14 can be used as standard parts.

  Further, since a plurality of fixing portions of the adapter 16 are formed in the longitudinal direction X of the arm shank 12, it is possible to set an optimum mounting position of the wiper blade 10 (adapter 16) for each vehicle type. .

  In addition, since the arm shank 12 of the wiper arm 22 and the adapter 16 are engaged by light press-fitting, the work of attaching the adapter 16 to the arm shank 12 can be easily performed. Further, when the wiper blade 10 is replaced, the fixed position of the adapter 16 does not shift, and it is possible to prevent the workability of the user from deteriorating. In addition, since members such as screws are not used for fixing the adapter 16 to the arm shank 12, an increase in the number of components can be suppressed.

  In the connection structure of the wiper arm 22 according to the third embodiment, the adapter 16 is rotatably attached at a connection portion between the arm shank 12 and the convex portion 16a of the adapter 16 as shown in a U section in FIG. I have. Further, as shown in the V section of FIG. 20, the blade holding member 14 is also rotatably attached to the connection between the notch 16b of the adapter 16 and the projection 14a of the blade holding member 14 shown in FIG. I have.

  As described above, in the arm shank 12, the swing point is provided at two places close to each other, so that the play of the blade holding member 14 increases, and the wiper blade 10 is moved to a curvature surface such as the rear glass 11 shown in FIG. 10. Followability can be improved, and wiping performance of the wiper arm 22 can be improved.

  The present invention is not limited to the above embodiment, and it goes without saying that various changes can be made without departing from the scope of the invention. For example, in the above embodiment, the connection structure of the wiper arm 22 is applied to the rear wiper device for wiping the rear glass 11 of a vehicle such as an automobile, but the present invention is not limited to this, and the present invention is not limited to this. The present invention can also be applied to a wiper device mounted on a front side, a wiper device mounted on a ship, an aircraft, a railway vehicle, and the like.

10, 10a, 10b Wiper blade 11 Rear glass 12 Arm shank 12a Inner wall surface 12b Rail portion (connection engaging portion)
12c recess (connection engaging part)
12d recess (connection engaging part)
13 Adapter (connecting member)
13a Convex part 13b Protruding part (part)
13c Notch 14 Blade holding member 14a Projection 15 Adapter (connecting member)
15a Protruding part (convex part)
15b Claw 15c Notch 16 Adapter (connecting member)
16a Convex part 16b Notch part 17 Fixing jig 20 Blade rubber 21 Arm head 22 Wiper arm

Claims (6)

A wiper arm connection structure for detachably connecting the blade holding member to the wiper arm,
Said wiper arm;
A connecting member fixed to an arm shank constituting the wiper arm,
The blade holding member that engages with the connection member and holds the wiper blade,
Has,
The connection member is located between the arm shank and the blade holding member,
The arm shank includes a plurality of connection engagement portions that can fix the connection member,
The connection structure of a wiper arm, wherein each of the plurality of connection engagement portions is provided at an interval along a longitudinal direction of the arm shank. The connection structure for a wiper arm according to claim 1,
The arm shank has a pair of inner wall surfaces facing each other,
The plurality of connection engagement portions are formed on each of the pair of inner wall surfaces,
The connection structure of a wiper arm, wherein the connection member is fixed to any of the plurality of connection engagement portions. The connection structure of a wiper arm according to claim 2,
A connection structure for a wiper arm, wherein the plurality of connection engagement portions are provided at equal intervals. The connection structure of a wiper arm according to claim 2 or 3,
The wiper arm connection structure, wherein the connection member is fixed to the arm shank by fitting a part of the connection member with the connection engagement portion. The connection structure of a wiper arm according to claim 4,
The connection member has a protruding portion formed with a claw portion,
The connection engagement portion is a concave portion formed on the inner wall surface of the arm shank,
A connection structure for a wiper arm, wherein the protruding portion is disposed in the recess, and the connection member is fixed by engagement of the claw portion and a wall forming the recess. The connection structure of a wiper arm according to claim 4,
The connection member includes a protrusion protruding from a side surface of the connection member,
The connection engagement portion is a concave portion formed on the inner wall surface of the arm shank,
A connection structure of a wiper arm, wherein the connection member is fixed by fitting the concave portion and the convex portion.

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