JP5239937B2 - Wiper arm - Google Patents

Description

  The present invention relates to a wiper arm in which a wiper blade for wiping a windshield of a vehicle or the like can be attached to and detached from a hook portion at the tip.

  Conventionally, the wiper arm has been designed to be easy to wipe off the windshield glass of a vehicle or to replace it with a wiper blade that has seasonal performance such as for summer or winter use. The retainer and the arm piece can be raised and lowered.

  In such a wiper arm, a spring guide is pivotally supported at the tip of the arm head, a reinforcement is disposed at the base of the retainer near the tip of the spring guide, and a compression coil spring is installed between them. Many of the constructions described above are easy to manufacture and have been implemented because of their advantages such as excellent design appearance (see, for example, Patent Document 1).

JP 2002-212365 A

  However, in such a conventional wiper arm, while the retainer and the arm piece are repeatedly raised and lowered, the compression coil spring is displaced from the spring guide.

  For this reason, there has been a problem that the magnitude and direction of the urging force of the compression coil spring may be distorted, the pressing force by the wiper arm may not be as set, and the wiper operation may not be maintained normally.

  In addition, when the wiper is activated, the compression coil spring, spring guide, spring guide tip, and reinforcement force penetration hole are likely to interfere with each other, and an irritating rubbing noise will be generated, which can be used for vehicle drivers and passengers. There was also the problem of giving discomfort.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a wiper arm that can keep the wiper operation normal and does not generate an unpleasant rubbing sound when the wiper is operated.

  In order to achieve the above object, the wiper arm of the present invention is such that the base end side of the arm head is pivotally supported on the drive shaft, and a retainer is pivotally supported near the tip of the arm head so that the tip of the arm head is supported. A spring guide is pivotally supported by the shaft, a reinforcement is disposed at the base of the retainer near the tip of the spring guide, and a compression coil spring is installed between the base of the spring guide and the tip of the reinforcement. In the wiper arm thus formed, a holder for holding a compression coil spring for holding the compression coil spring is provided between the reinforcement and the compression coil spring.

  Here, it is preferable that a fixing piece for preventing misalignment is formed around the holder for holding the compression coil spring to fix the outer peripheral surface of the tip of the compression coil spring.

  Also, a substantially central portion of the holder for holding the compression coil spring is provided with a through hole of a size that allows the spring guide to pass therethrough, and extends from the through hole and is provided at the tip of the reinforcement. It is preferable that a locking piece that is locked in the through hole of the spring guide is formed.

  In such a wiper arm of the present invention, the base end side of the arm head is pivotally supported on the drive shaft, the retainer is pivotably supported near the tip of the arm head, and the spring guide is rotatable at the tip of the arm head. A wiper arm is provided with a reinforcement disposed at the base of the retainer near the distal end of the spring guide, and a compression coil spring is installed between the proximal end of the spring guide and the distal end of the reinforcement.

  And it is the structure by which the holder for compression coil spring holding | maintenance which hold | maintains a compression coil spring was provided between the reinforcement and the compression coil spring.

  Because of this structure, the holder for holding the compression coil spring prevents the displacement of the compression coil spring from the spring guide, so that the magnitude and direction of the biasing force of the compression coil spring do not change and the pressing force by the wiper arm Becomes as set, and the wiper operation can be kept normal.

  In addition, when the wiper is activated, the compression coil spring and the spring guide, and the spring guide tip and the through hole for the reinforcement force interfere with each other, so that an unpleasant rubbing noise is not generated, which is inconvenient for the vehicle driver and passengers. Don't give pleasure.

  Here, when a fixing piece for preventing misalignment is formed around the holder for holding the compression coil spring, the fixing coil for preventing the displacement is fixed to fix the outer peripheral surface of the tip of the compression coil spring. A structure that prevents misalignment can be realized.

  In addition, a through hole having a size that allows the spring guide to pass therethrough is provided at a substantially central portion of the holder for holding the compression coil spring, and the spring guide provided at the tip of the reinforcement is extended from the through hole. When a locking piece that is locked in the through hole is formed, a structure for fixing the holder for holding the compression coil spring to the tip of the reinforcement can be realized easily and inexpensively.

It is a perspective view which shows schematic structure of the vehicle provided with the wiper arm of the Example. It is the side view which fractured | ruptured the principal part which shows schematic structure of the wiper arm of an Example. It is a bottom view which shows schematic structure of the wiper arm of an Example. FIG. 3 is a partial enlarged view of a main part in the wiper arm of FIG. 2. (A) is a front view of the holder for compression coil spring holding | maintenance of an Example, (b) is AA arrow sectional drawing in (a).

  DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention will be described based on examples shown in the drawings.

  In the wiper arm 1 of the present embodiment, as shown in FIG. 1, the fixing hole 11 a on the base end side of the arm head 11 at the rear end is pivotally supported on a drive shaft (not shown) of the vehicle 2, The wiper blade 3 is detachably installed via a fixture 31 to the U-shaped hook portion 13a at the tip of the arm piece 13 via the retainer 12 (see also FIGS. 2 and 3).

  Then, the wiper arm 1 is reciprocated in the direction indicated by the arrow by a wiper motor (not shown), and the wiper blade 3 wipes the wiping surface 4a of the front window glass 4. It is made to stand by at the edge in a stopped state.

  As shown in FIGS. 2 and 3, the wiper arm 1 of the present embodiment includes an arm head 11, a retainer 12 having a substantially C-shaped cross section supported by a rivet 5 near the tip of the arm head 11, and a retainer The arm piece 13 is mainly composed of an arm piece 13 having a U-shaped hook portion 13a at the tip which is held by the rivets 6 and held by the tip 12 holding pieces 12a, 12a.

  As shown in FIG. 4, the spring guide 7 is rotatably supported at the tip of the arm head 11 by a roller pin 8, and the reinforcement 9 is fixed to the base of the retainer 12 by rivets 10 and 10. Has been.

  A compression coil spring 14 is installed between the convex portions 71 and 71 formed near the base end of the spring guide 7 and the wall portion 91 formed at the tip of the reinforcement 9.

  Further, a holder 15 for holding a compression coil spring for holding the compression coil spring 14 is provided between the reinforcement 9 and the compression coil spring 14.

  Here, the holder 15 for holding the compression coil spring is made of a material that has high strength and durability, such as stainless steel, and is easy to process, and has a thickness as shown in FIGS. 5 (a) and 5 (b). Around the thin disc-shaped holder body 15A of about 0.2 mm, four fixing pieces 15a for preventing misalignment, which fix the outer peripheral surface of the compression coil spring 14 in the vicinity of the end on the side in contact with the holder body 15A,. .. are formed by bending.

  However, the number of fixing pieces 15a for preventing misalignment is not limited to four, and the number of fixing pieces 15a that can fix the outer peripheral surface in the vicinity of the end of the compression coil spring 14 in contact with the holder main body 15A is set. To do.

  In addition, the holder 15 for holding the compression coil spring is provided with a through-hole 15b having a size through which the spring guide 7 can penetrate in a substantially central portion of the holder main body 15A.

  Furthermore, since a clearance as play is provided between the spring guide 7 and the through hole 91a of the spring guide 7 provided in the wall portion 91 of the reinforcement 9, the holder main body 15A includes Four locking pieces 15c that extend from the through hole 15b and are locked to the through hole 91a of the spring guide 7 provided in the wall portion 91 of the reinforcement 9 are formed by bending. .

  However, the number of the locking pieces 15c is not limited to four, and the number of the locking pieces 15c may be set so as to be locked in the through hole 91a of the spring guide 7 provided in the wall portion 91 of the reinforcement 9. Good.

  The through-hole 15b is formed by providing a substantially arc-shaped portion between the locking pieces 15c,..., But these substantially arc-shaped portions are formed by bending the locking pieces 15c,. This is to prevent distortion during processing.

  Further, the wiper arm 1 is mounted such that a portion where the inside shown in FIG. 3 is exposed faces the wiping surface 4 a side of the windshield 4 of the vehicle 2.

  The retainer 12 and the arm piece 13 are separated from the wiping surface 4a and the wiping surface 4a of the windshield glass 4 near the tip of the arm head 11 with the rivet 5 as an axis, as shown by a solid line and a virtual line in FIG. It is possible to rise and fall between the directions that are separated from each other at a substantially right angle.

  Thus, when the retainer 12 and the arm piece 13 are raised, the wiping surface 4a of the windshield 4 of the vehicle 2 is wiped or replaced with a wiper blade 3 having a performance adapted to the season such as summer or winter use. Can be easily done.

  On the other hand, when the retainer 12 and the arm piece 13 are tilted, the blade rubber (not shown) of the wiper blade 3 is pressed against the wiping surface 4a of the front window glass 4 of the vehicle 2 with an appropriate pressing force.

  Next, the effect of the wiper arm 1 of the present embodiment will be described.

  In the wiper arm 1 of this embodiment, a fixed hole 11 a on the base end side of the arm head 11 is pivotally supported on the drive shaft of the vehicle 2, and the retainer 12 can be pivoted near the distal end of the arm head 11. The spring guide 7 is pivotally supported at the distal end of the arm head 11, the reinforcement 9 is disposed at the base of the retainer 12 near the distal end of the spring guide 7, and the reinforcement 9 near the proximal end of the spring guide 7. This is a wiper arm in which a compression coil spring 14 is installed between the tips of the two.

  A compression coil spring holding holder 15 for holding the compression coil spring 14 is provided between the wall portion 91 of the reinforcement 9 and the compression coil spring 14.

  With this configuration, the holder 15 for holding the compression coil spring prevents the displacement of the compression coil spring 14 with respect to the spring guide 7, so that the magnitude and direction of the urging force of the compression coil spring 14 do not vary and the wiper The pressing force by the arm 1 becomes as set, and the wiper operation can be kept normal.

  In addition, when the wiper is operated, the compression coil spring 14, the spring guide 7, the tip of the spring guide 7 and the through hole 91a of the spring guide 7 of the wall portion 91 of the reinforcement 9 interfere with each other, and an unpleasant rubbing sound is generated. Therefore, the driver of the vehicle 2 and the passengers do not have to feel uncomfortable.

  Here, around the holder main body 15A of the holder 15 for holding the compression coil spring, there are formed fixing pieces 15a,... For preventing misalignment for fixing the outer peripheral surface of the distal end portion of the compression coil spring 14. Therefore, it is possible to realize a structure that prevents the displacement of the compression coil spring 14 easily and inexpensively.

  In addition, a through hole 15b having a size through which the spring guide 7 can pass is provided at a substantially central portion of the holder main body 15A of the holder 15 for holding the compression coil spring, and extends from the through hole 15b. Since the locking pieces 15c,... That are locked to the through holes 91a of the spring guide 7 provided in the wall portion 91 at the distal end of the spring 9 are formed, the distal end of the reinforcement 9 is easily and inexpensively formed. The structure which fixes the holder 15 for compression coil spring holding | maintenance to the wall part 91 of this can be implement | achieved.

  Further, since the holder 15 for holding the compression coil spring is very thin with a thickness of about 0.2 mm, the above-described effects can be achieved without changing the design of the other members of the wiper arm 1 at all. Can be implemented economically.

  As mentioned above, although the form for implementing this invention was explained in full detail based on the Example with reference to drawings, the concrete structure is not limited to this Example, and is a grade which does not deviate from the summary of this invention. Design changes are included in the present invention.

  For example, in the above-described embodiment, the reinforcement 9 and the holder 15 for holding the compression coil spring are implemented as separate members, but the present invention is not limited to this, and both may be integrated.

DESCRIPTION OF SYMBOLS 1 Wiper arm 11 Arm head 12 Retainer 13 Arm piece 2 Vehicle 3 Wiper blade 7 Spring guide 9 Reinforce 91 Wall part 91a Hole for spring guide penetration 14 Compression coil spring 15 Holder 15A for holding a compression coil spring Holder body 15a Position Fixing piece 15b for preventing misalignment Through hole 15c Locking piece

Claims (2)

A base end side of the arm head is pivotally supported on the drive shaft, a retainer is pivotally supported near the distal end of the arm head, and a spring guide is pivotally supported on the distal end of the arm head. The spring guide In a wiper arm in which a reinforcement is disposed at the base of the retainer near the distal end, and a compression coil spring is installed between the proximal end of the spring guide and the distal end of the reinforcement,
A holder for holding the compression coil spring that holds the compression coil spring is provided between the reinforcement and the compression coil spring .
A substantially central portion of the holder for holding the compression coil spring is provided with a through hole having a size that allows the spring guide to pass therethrough, and extends from the through hole and provided at the tip of the reinforcement. A wiper arm, wherein a locking piece is formed to be locked in a through hole of the spring guide .   2. The wiper according to claim 1, wherein a fixing piece for preventing displacement is formed around the holder for holding the compression coil spring to fix an outer peripheral surface of a tip end portion of the compression coil spring. arm.

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