WIPERBLADE OF WINDSHIELD WIPER

Abstract: A wiperblade comprising a main yoke (1) having on the longitudinally central portion formed by two side plates (2, 3) spaced apart and parallel, non-circular and aligning through holes (5, 6) formed in the side plates, and a pin (14) having non-circular portions (16, 17) corresponding to the non-circular holes in the side plates, said pin being inserted from the outside of either of the side plates so as to constitute a pivotal connecting portion between the wiperblade and a wiper arm.

Description: The present invention relates to a wiperblade connector assembly for operatively connecting a yoke of a wiperblade with a wiper arm in accordance with the pre-characterising portion of claim 1. Various proposals have been made with respect to the construction of a connecting portion between a wiper arm and a yoke of a wiperblade of the windshield wiper. With respect to the configuration of the tip end portion of the wiper arm, there are 1) a bayonet clip type such as shown in Figure 13, 2) a side clip A type such as shown in Figure 7, 3) a side clip B type such as shown in Figure 8, 4) a U-hook type such as shown in Figure 2 and the like. These types require specified construction of yokes to which the wiper arms are connected respectively. Thus, due to lack of interchangeability the numbers of particular types of wiperblade which have to be available increases correspondingly. The present invention has been made in view of the circumstances aforementioned, and aims to provide a wiperblade which can be connected to any of a given variety of different types of wiper arm. A wiper blade connector assembly in accordance with the pre-characterising portion of claim 1 is known from US-A-4 608 728. In the connector assembly of US-A-4 608 728 the holes in the side plates are of circular outline to receive cylindrical projections on an insert, and the pin constituting the pivotal connecting device has cylindrical portions which are rotatably received in aligned holes in the projections which act as bushings. According to our invention in a wiperblade connector assembly in accordance with the pre-characterising portion of claim 1, the holes in the plates are of non-circular outline, and the pin is formed at opposite ends with complementary portions of non-circular outline adapted to be received in the holes. This acts to key the pin against rotation with respect to the yoke thereby preventing wear due to relative movement between the pin and the yoke and avoiding the necessity for providing anti-wear bushings. Preferably the pin has a reduced diameter circular portion between the portions of non-circular outline, and a connecting member has a bore for receiving the reduced diameter portion of the pin, and a cut-out for resiliently guiding the reduced diameter portion of the pin into the bore. A wiper arm of U-hook type can be connected to the wiperblade by providing the connecting member with the outer configuration adapted to fit with the tip end of the wiper arm. The pin may be formed to have a tubular form adapted to receive a pivot pin of a wiper arm of side clip type having the sidewise projecting pivot pin, with a cutout formed in the tubular pin to receive a spring, and a spring retainer is preferably supported by the tubular pin and between the side plates of the wiper arm. The wiperblade according to the invention having the tubular pin may also be connected to a wiper arm of side clip type and not having sidewise projecting pin. A pin having a pin portion is inserted into the tubular pin on one end and another pin portion on the other end which is adapted to be releasably connected to the wiper arm. Brief Description of the Drawings Further objects and effects of the invention will become apparent from the following detailed description taken in conjunction with the drawings, in which: Fig. 1 is a perspective view of the central portion of a wiperblade according to present invention; Fig. 2 is a perspective view of the tip portion of a U-hook type wiper arm; Fig. 3 is a perspective view of a connecting member for use with the wiper arm of Fig. 2; Fig. 4 is a side view of the connecting member of Fig. 3; Fig. 5 is a perspective view of a pin; Fig. 6 is a side view of the pin of Fig. 5; Fig. 7 and Fig. 8 are perspective views of tip end portions of wiper arms of side lock type, respectively; Fig. 9 shows a side view and an end view of a sleeve for use with the wiper arm of Fig. 7 or Fig. 8; Fig. 10 and Fig. 11 are a side view and a plan view of a second connecting member, respectively; Fig. 12 is a side view of a pin for use with the wiper arm of Fig. 8; Fig. 13 is a perspective view of the tip end portion of a wiper arm of bayonet clip type, and Fig. 14 is a side view of a connecting member for use with the wiper arm of Fig. 13. Detailed Description of Preferred Embodiments Fig. 1 is a perspective view of the longitudunal central portion of a main yoke 1 of the wiperblade of the present invention. The main yoke 1 is formed at the central portion with two spaced and parallel side plates 2 and 3, to define a space 4 being open in upward and downward directions. Non-circular and aligning through holes 5 and 6 are formed respectively in the side plates 2 and 3. In the embodiment, each of the through-holes 5 and 6 has a configuration formed by connecting a large diameter half circle and a small diameter half circle, and has an equal size, but the holes 5 and 6 may have any desired configuration and may have different size. Fig. 3 ∼ Fig. 6 show means for connecting a wiper arm of U-hook type as shown in Fig. 2 with the yoke 1 of Fig. 1. The wiper arm 7 of U-hook type as shown in Fig. 2 has on the tip end thereof a curved portion 7A and a retaining opening 7B. A connecting member 8 shown in Figs. 3 and 4 and a pin 14 shown in Figs. 5 and 6 are used to connect pivotally the yoke 1 and the wiper arm 7. The connecting member 8 comprises flange portions 9 and 10 on opposite sides, a main body portion 11 being disposed between the flange portions 9 and 10 and having the configuration corresponding to the curved portion 7A of the wiper arm 7, a retaining portion 12 being integrally formed on the lower surface of the main body portion 11 and having a projection or pawl 12A which is resiliently biased downward for engaging with the retaining opening 7B of the wiper arm 7, and a transversely extending bore 13 having a cutout 13A. Preferably, the connecting member 8 is formed integrally of synthetic resin material. The pin 14 comprises a small diameter portion 15 being received rotatably in the bore 13 of the connecting member 8, non-circular portions 16 and 17 corresponding to the holes 5 and 6 in the yoke 1, and a flange 18 provided on one end of the pin 14. In use, the pin 14 is inserted through the holes 5 and 6, with the flange 18 abutting on the outer surface of either one of the side plates 2 and 3. The pin 14 is non-rotatably connected to the yoke 1. Next, the connecting member 8 is mounted on the small diameter portion 15 of the pin 14. By determining suitably the size of the cutout 13A of the bore 13 in the connecting member 8, the material of the connecting member 8, and the rigidity or resiliency of portions 11A adjacent to the cutout 13A (Figure 4), it is possible to connect the pin 14 with the connecting member 8 snappingly. Since the connecting member 8 prevents the pin 14 from slipping out of the holes 5 and 6, no additional retaining means is required. Figure 7 shows the tip end portion of a wiper are 20 of side clip A type, and Figure 8 shows the tip end portion of a wiper arm 22 of side clip B type. The wiper are 20 has a pin portion 21 projecting in the sidewise direction, and the wiper arm 22 has a bore 23 for receiving a pin and a spring 24 for engaging with a small diameter portion of the pin. The wiperblade according to the invention can also be connected to the wiper arm 20 or 22 of side clip type shown in Figs. 7 and 8 by utilizing a sleeve or pin 25 as shown in Fig. 9, a connection member or spring supporting member 30 shown in Figs. 10 and 11, and a pin 35 shown in Fig. 12. The pin 35 is used only for the wiper arm 22 of the side clip B type. The sleeve 25 shown in Fig. 9 includes a flange 26 on one end, a bore 27 and a cutout portion 28, and the cross sectional configuration of the sleeve 25 corresponds to the non-circular through holes 5 and 6 in the main yoke 1. The spring supporting member 30 shown in Figs. 10 and 11 is two part synthetic resin mouldings, and has an opening 34 corresponding to the through holes 5 and 6 in the main yoke 1, and is mounted in the space 4 by the sleeve 25. A part of the spring 33 is received in the cutout portion 28 of the sleeve 25 so as to prevent the sleeve 25 from escaping out of the through holes 5 and 6, whereby the main yoke 1, the sleeve 25 and the spring supporting member 30 in the assembled condition without providing any particular retaining means. In connecting the wiper arm 20 of Fig. 7 with the main yoke 1, the pin 21 is inserted into the bore 27 of the sleeve 25 and the spring 33 engages with the small diameter portion 21A of the pin 21 to prevent the pin 21 from escaping out of the bore 27. It will be understood that the escaping out of the sleeve 25 is also prevented by the spring 33. In connecting the wiper arm 22 of Fig. 8 with the main yoke 1, the pin 35 of Fig. 12 is inserted into the bore 27 of the sleeve 25 so that the spring 33 engages with a small diameter portion 35A of the pin 35 to prevent the pin 35 from escaping out of the bore 27 and to prevent the sleeve 25 from escaping out of the holes 5 and 6 in the main yoke 1. The pin 35 is inserted into the opening 23 in the wiper arm 22 with the small diameter portion 35B of the pin 35. Thus, the wiper arm 22 is reliably and easily connected with the main yoke 1. Fig. 13 shows a wiper arm 40 of bayonet clip type. The wiper arm 40 has a projection 40A. Fig. 14 shows a connecting member 45 for use in connecting the main yoke 1 with the wiper arm 40. The member 45 includes an opening 46 for receiving the small diameter portion 15 of the pin 14 of Fig. 5, a cutout portion 47 extending along the length of and communicating with the opening 46 for releaseably mounting the pin 14 in the opening 46, another cutout portion 48 for permitting resilient deformation of the cutout portion 47, and a retaining member 50 for releaseably mounting the wiper arm 40 on the connecting member 45. The retaining member 50 includes a front end portion 50A which is located in an opening formed in the upper surface of the connecting member 45 at a retaining condition shown in Fig. 14, and is adapted to be pushed downward in removing the wiper arm 40 for permitting the retracting movement of the wiper arm together with the retaining member 50. Further, the retaining member 50 has a rear end portion 50B, an opening 50C for engaging with the projection 40A of the wiper arm 40, and a downward projecting portion 50D. The projecting portion 50D engages with an opening 49 in the lower surface of the connecting member 45 in a released condition. The construction of the retaining member 50 is known per se. The pin 14 acts to mount the connecting member 45 on the yoke 1, and the connecting member 45 acts to prevent the pin 14 from escaping out of the yoke 1. According to preferred embodiments, the pins 14 and 35, the sleeve 25, and the connecting members 8, 30 and 45 can be formed of synthetic resin mouldings, thereby reducing the cost. According to the invention, a novel construction of a pivotally supporting portion and of a yoke for connecting with wiper arms of various types. The wiperblade according to the invention can easily be connected to wiper arms of various types, thus, it is possible to reduce the types of the wiperblade thereby reducing the manufacturing cost.

Claims: 1. A wiperblade connector assembly for operatively connecting a yoke (1) of a windshield wiper with a wiper arm, said yoke (1) having a central section of two spaced apart and parallel side plates (2, 3) in which are formed aligned holes (5, 6) through which a pin (14, 25) constituting a pivotal connecting device between the wiper arm and the wiperblade is adapted to be passed from the outside of either of the side plates (2, 3), characterised in that the holes (5, 6) in the plates (2, 3) are of non-circular outline, and the pin (14, 25) is formed at opposite ends with complementary portions (16, 17) of non-circular outline adapted to be received in the holes (5, 6). 2. A wiperblade connector assembly according to claim 1, in which the pin (14) has a reduced diameter circular portion (15) between the portions (16, 17) of non-circular outline, and a connecting member (8, 45) has a bore (13, 46) for receiving the reduced diameter portion (15) of the pin (14), and a cut-out (13A, 47) for resiliently guiding the reduced diameter portion (15) of the pin into the bore. 3. A wiperblade connector assembly according to claim 2, in which the connecting member (8, 45) has a configuration adapted to fit with the tip end of a wiper arm (7) of the U-hook type. 4. A wiperblade connector assembly according to claim 2, in which the connecting member (45) has a retaining portion (50A) for releasably receiving the tip end of a wiper arm (40) of the bayonet type. 5. A wiperblade connector assembly according to claim 1 or claim 2, in which the pin (25) is of tubular form having a bore (27) adapted to receive a sidewise projecting pivot pin (21) of a wiper arm (20) of the side clip type, and a cut-out (28) leading into the bore (27), and in which the pivot pin (21) has a reduced diameter portion (21A) with which a spring (33) disposed between the side plates (2, 3) is engageable through the cut-out (28). 6. A wiperblade connector assembly according to claim 5, in which the reduced diameter portion comprises a first pin portion (35A), and the pivot pin (35) has a second pin portion (35B) adapted to be received in a wiper arm of the side clip type not having a side projecting pivot pin.

Inventors: ARAI, MASARU C/O NIPPON WIPERBLADE CO.LTD.
Applicants: NIPPON WIPER BLADE CO., LTD.
Application year: 1988
Main classification: B60S1
IPC codes: B60S1