JPH04104060U - wiper blade - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent wipers from separating from the windshield in high-speed vehicles. CONSTRUCTION: The wiper brace or mounting bar is provided with a deflector screen that projects in the direction of the scraper strip.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to wiper blades for automobiles.

0002

[Conventional technology]

Currently, there are various types of wiper blades for automobiles. These blurs The simplest blade has a rubber scraper strip. This strip can be used as a windshield or headlight glass. It has the wiping edge in contact with the surface to be wiped and is fixed to one end of the wiper arm. The arm is attached directly to the brace so that it can be It is designed to move.

0003 Also, in an improved version, the scraper strip is attached to the scissors at the end of the mounting bar. This mounting bar is elongated and slightly curved with a central section that pivots on the brace. Formed by freely attached members, the brace can be extended and slightly bent. Make sure the recessed part of the brace and mounting bar faces the scraper strip. There is.

0004 The central portions of the two adjacent mounting bars are also each hinged to one end of the second brace. It can also be fixed with a bolt, in which case the second brace can be lengthened and bent slightly. Both are hinged to the main brace in the center.

[0005] In general, the wiper has a scraper strip that hits the surface that is being wiped. It is pressed down by an elastic device.

[0006] These wipers hold the scraper strip against the surface to be wiped. The surface of the toe is not flat and the downward curvature of the blade moves the blade forward and backward. Even if the contour changes over time, it can be maintained so that it hits relatively regularly. I'm testifying.

[0007]

[Problem that the idea aims to solve]

However, no matter what type of wiper blade is installed on your vehicle, , the vehicle may be damaged by the vehicle, especially by the slope of the windshield or by the windshield wiper. When a certain critical speed determined by various properties related to the shape and supporting pressure of the The scraper strip stands up on surfaces that should be wiped, such as windshields. It is known to move some distance from the surface. This separation phenomenon is 1 One risk factor is that vehicle drivers have better visibility when driving at high speeds. As the vehicle speed increases, the wiper This is because efficiency decreases.

[0008] In order to retard or even eliminate such separation as a function of speed, The wiper arm or brace is equipped with blades whose surface is directly against the windshield. This vane should be pushed towards the windshield, approximately at right angles to the airflow hitting it. The wiper blade presses against the windshield with a force that increases with the speed of the vehicle. A proposal was made to make it easier to use. However, according to the experimental results, These vanes are usually caused by the airflow along the windshield hitting the underside. It was lifted by aerodynamic forces, which was not satisfactory.

[0009]

[Means to solve the problem]

This invention significantly exceeds the speed required to lift a conventional blade of the same vehicle type. A wiper blade that solves the above-mentioned drawbacks at increasing speeds. This is what we provide.

0010 The present invention also has the above-mentioned advantages, simple structure, low manufacturing cost, and especially self-sustaining. Many uses include wiping vehicle windshields and headlight glasses Replaces all known types of windshield wiper blades in It is related to blades that can be used.

[0011] The wiper blade according to the present invention has a wiping edge for contacting the surface to be wiped. a scraper strip having a section and at least one brace; This brace is fixed to an arm pivotably mounted on the vehicle and is attached to the scraper. The strip is supported as far as possible by at least one mounting bar.

0012 and at least one in the brace and/or one in the mounting bar as required. It has a U-shaped cross section, with the concave part of this cross section facing towards the scraper strip. At the same time, it has a backbone, and this backbone is supported by a member with a U-shaped cross section. and protrude in the opposite direction from the scraper strip. This kind of block Lade is described in US Pat. No. 3,296,647.

[0013] The blade according to the invention comprises at least one brace and/or as few as necessary. Both have one mounting bar with a deflector protruding in the direction of the scraper strip. ・It is characterized by the provision of a screen.

[0014] This deflector screen effect is combined with the blade spine effect. , further retarding the lifting movement of the blade from the surface to be wiped.

[0015] If one of the braces with the deflector screen is of U-shaped cross section , the corresponding deflector blades are placed in the extension of one side of this U-shaped cross section. It is good.

[0016] on at least one brace attached to the wiper blade and/or at least one approximately perpendicular to the air flow deflected by the surface to be wiped over the mounting bar The presence of a spine whose upper part extends in the plane of the blade counteracts the lifting motion of the blade. It has an unexpected effect.

[0017] The brace with the spine has a U-shaped cross section and the concave part of the cross section is the scraper strike. If facing towards the lip, the corresponding spine is according to this invention support on the web of the U-shaped cross section of the base, or alternatively on one side of this cross section. All you have to do is get it.

[0018] In either case, the spine may be a blade with approximately parallel surfaces. but, If the spine is supported by the web of the U-shaped cross section of the brace, this U-shaped cross-section web Fillet the part of the spine opposite the web onto at least one edge of this web. It can also be attached by fillets on both edges. is desirable.

[0019] In all the above cases, the height of the spine is such that it is relative to the surface to be wiped. braces or attachments that support the spine as being in a plane approximately perpendicular to the The height of the bar should be approximately equal to the height that is considered to be in the same plane as the above-mentioned plane. It is more advantageous. Especially if the corresponding brace has a U-shaped cross section, this The height of the spine protruding from the web of the cross section is the height of the side part of this U-shaped cross section. Make them approximately equal.

[0020] In one embodiment, at least one of the mounting bars with a spine has a rounded apex. It has a rectangular cross section, and one of these vertices forms the spine. at least If one mounting bar also has a polygonal cross-section with rounded vertices, this cross-section at least one piece forming a deflector screen for the corresponding mounting bar. It is best to have a tapered apex if possible.

[0021] Each spine may be attached to a brace or corresponding mounting bar; It should be integrally formed with the brace or mounting bar.

[0022]

【Example】

As shown in Figures 1 and 2, conventional windshield wiper blades are This main brace (10) is elongated and slightly curved with a U-shaped cross section. The side parts (12) and (14) of this cross section are almost parallel to the web (16) as shown in Figure 2. It is at right angles to. The web (16) with a U-shaped cross section has two tabs in its center. The tabs (18) have openings laterally formed by the tabs (18), and the tabs (18) 2) Located approximately in the extension of (14) and connected by a pivot pin (20).

[0023] The central opening of the main brace (10) and the pivot pin (20) allow the main brace (10) to , a hinged stop of known type carried on the end of a windshield wiper arm. Can be installed on the trial part. At the two ends (22) of the main brace (10), the U The height of both side parts (12) and (14) of the cross section of the letter shape is made higher, and the bent tabs are used to create a U shape. Scissors for fixing the secondary brace (26) by extending it towards the inside of the cross section of the glyph. form.

[0024] The main brace (10) extends from the center of the web (16) of the U-shaped cross section to both sides of said cross section. On the opposite side of parts (12) and (14) there is a butt between the central tab (18) of the main brace (10) and the end part (22). It has a protruding protrusion or spine (24). The spine (24) is actually one of the main braces (10). It is constructed in the form of a blade with flat, nearly parallel surfaces extending from one end (22) to the other. , where the spine (24) is fixed to the wiper arm at the center of the main brace (10). This is because it is simply interrupted by an opening provided for this purpose.

[0025] As is clear from Figure 2, the height of the spine is measured in the plane of symmetry of the U-shaped cross section. , practically equal to the height of both side parts (12) and (14), and the spine (24) is integral with the main brace (10). It has become.

[0026] The two secondary braces (26) are approximately the same shape as the primary brace (10), but with smaller dimensions. It has become. These secondary braces (26) are also elongated and bent, and each The main brace is arranged such that the secondary brace (26) can pivot relative to the main brace (10) in a known manner. so that at least the central part of the secondary brace (26) is held within the U-shaped cross section of the base (10). It has a U-shaped cross section of a large size.

[0027] The secondary brace (26) is also made long and bent at its two ends (28). It is equipped with scissors for fixing the central part of the mounting bar (30). This mounting bar is also Scissors (32) for grasping the thick shoulder (36) of the rubber scraper strip (34) It is equipped with The scraper strip (34) is attached to the shoulder (36) by a hinge (40). It is equipped with a wipe side part (38) connected to each other, and is arranged almost regularly along the length. At points, two secondary braces (26) are pivotally attached to the primary brace (10). It is fixed to four mounting bars (30) provided at both ends. Main brace (10), secondary The concave portions of the brace (26) and mounting bar (30) are connected to the main brace (10) and the sub-brace (26). towards the scraper strip (34) as well as the concave part of the U-shaped cross section of facing.

[0028] As shown in Figure 2, each mounting bar (30) has a rectangular cross section with a rounded apex; One of these vertices (42) is relatively tapered than the opposite apex (44). in the opposite direction from the scraper strip (34), i.e. in the main brace (10). thrust in the direction in which the spine (24) protrudes relative to the web (16) of the corresponding U-shaped cross section; It's out. This vertex (42) (for example, formed by two sides sandwiching a 60° angle) However, the vertex (44) is formed by two sides making an angle of 120°), for example The spine of the mounting bar (30) is molded from a plastic material such as polyamide. is formed. The cross section of the mounting bar (30) is tapered at one vertex to form a corresponding half. You can think of it as a modified rhombus that doubles the length of the diagonal.

[0029] 3 and 4 show a first embodiment of the present invention. The main plate is long and curved. The lace (50) also has a U-shaped cross section, its side parts (52) and (54) being approximately parallel and Place it at right angles to the web (56). Turn the opening in the center of the main brace (50) sideways. The forming tabs (58) are interconnected by a pivot pin (60) for fixing to the wiper arm. Connect to. The spine (64) is also located laterally of the central opening along the bottom of the U-shaped cross section. edge and cross-section end (62) (with tabs for fixing the secondary brace) prolong it in between.

[0030] However, in this embodiment, the vertex (66) of the spine (64), i.e. the web (56) of U-shaped cross section lateral parts (52) (54) and the most protruding in the direction opposite to the scraper strip. The spine portion (66) connected to the longitudinal edge of the web (56) by a fillet (68) The radius of this fillet (68) is, for example, twice the height of the spine (64), and The spine (64) should be at approximately the same height as the side parts (54). On the other hand, the side part (52) of the U-shaped cross section is , extended by a deflector screen (70) along the entire length between the tabs at the end (62). vinegar. This deflector screen (70) therefore It protrudes in the direction of the lip, and its effect combines with that of the spine (64) to reduce the surface to be wiped. It counteracts and prevents lifting movements of the blade from the surface. deflector screen The height of the lean (70) should, for example, be equal to the height of the side part (54) and therefore the corresponding brake. It is also equal to the height of the spine (64) which is integral with the base (50).

[0031] A second embodiment of the main brace (80) is shown in FIGS. 5 and 6. The main brace (80) is elongated Stretch it out and bend it slightly to give it a U-shaped cross section. However, the side part (84) (86), while the other side (82) of the U-shaped cross section is on the side. The side part (84) is tilted at a slight angle of 8 degrees, for example, to the side part (84). 2) and (84) are parallel to each other, except for the end of the scissors (92) of the main brace (80). Add a slight flare shape to the cross section. In this embodiment as well, the side part (82) is a scraper. extended by a deflector screen (100) oriented towards the path strip. of the part formed by the brush, side part (82) and deflector screen (100). The height should be approximately twice the height of the side part (84).

[0032] A spine or spine with approximately parallel flat surfaces and a height approximately twice the height of the side portions (84). The trip (94) forms the edge of the central opening of the main brace (80) on the outer surface of the side part (84). 2 connected by a pivot pin (90) for fixing to the wiper arm. Install it toward one of the tabs (88).

[0033] Strips (94) or e.g. attached to the sides (84) of the U-shaped cross section of the main brace strips (94) secured to the sides (84) by suitable conventional elastic locking materials; constitutes the spine. and opposite to the scraper strip against the web (86) The height of the part projecting in the direction of shall be equal to the height of the U-shaped cross section.

[0034] The main brace shown in cross section in Figure 7 is similar to that in Figure 4, the only difference being that One side (122) extended by a deflector screen (140) extends over the spine (134). against the other side (124) approximately perpendicular to the supporting U-shaped cross-section web (126); It is a sloping point.

[0035] The mounting bar, shown in cross section in Figure 8, has a pentagonal cross section with rounded vertices. Ru. A vertex that forms an obtuse angle with two adjacent sides and appears relatively tapered. one of the vertices (142) facing away from the scraper strip. so that it sticks out once to form the spine of the mounting bar. Another vertex (144) The apex (144) also appears relatively tapered, and the adjacent part of this apex (144) also protrudes. the mounting bar so that it protrudes at an angle toward the scraper strip. form a deflector screen. The cross section of this mounting bar has wide branching branches. approximately L-shaped, with the end of one branch attached to the spine and the end of the other branch attached to the spine. The ends are deflector screens.

[0036] The mounting bar shown in Figure 9 has a rectangular cross section with a rounded apex and has an adjacent The two sides form an obtuse angle. Thereby, in the opposite direction of the scraper strip One adjacent apex (152) projecting towards the other forms a spine, and the adjacent taper A deflector screen is formed adjacent to the apex (154).

[0037] In the embodiments described above, the spine and deflector screen are integral with the mounting bar. However, these members may also be formed from parts attached to the mounting bar.

[0038] Although not shown, the secondary brace of the wiper blade according to the present invention includes a spine. and deflector screens, and connect these to each other as in the case of the main brace. It may be connected to or formed integrally.

[0039] The supporting members of the main brace, sub-brace, and mounting bar spine are made of metal. In some cases, it may be formed by stamping at the same time as this support member. or The supporting members of these spines are made of molded material such as plastic. If it is a support member, it may be molded integrally with this support member.

[0040] According to experiments conducted by the applicant, it is possible to lift a wiper using the blade according to the present invention. The windshield wiper speed was at least 20km/h faster than the speed for conventional wipers. It has been confirmed that, in some variants, this improvement is even more significant. It is. The device described above can be used by a person skilled in the art without departing from the scope of claims for utility model registration. It is possible to transform and modify.

[Brief explanation of drawings]

FIG. 1 is a front view of a conventional windshield wiper blade.

FIG. 2 is a sectional view taken along line II-II in FIG. 1.

FIG. 3 is a perspective view of a first embodiment of a main brace that can be used to form a blade according to the present invention;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a perspective view of a second embodiment of a main brace that can be used to form a blade according to the present invention.

FIG. 6 is a sectional view taken along line VI-VI in FIG. 5;

FIG. 7: FIG. 4 of a third embodiment of the main brace according to the invention.
7 is a sectional view similar to the sectional view shown in FIG.

FIG. 8 is a cross-sectional view of a mounting bar used in a blade according to the present invention;

FIG. 9 is a cross-sectional view of a mounting bar used in a blade according to the present invention.

[Explanation of symbols]

(10)(50)(80) Main brace (12)(14)(52)(54)(82)(84)(122)(124) Side part (16)(56)(86) Web (18) (58) Tab (20) (60) Pivot pin (22) (28) (62) End (24) (64) (134) Spine (26) Secondary brace (30) Mounting bar (32) (92) Scissors (34) Scraper strip (36) Shoulder part (38) Wipe side part (40) Hinge part (42) (44) (142) (144) (152) (154) Vertex (66) Spine part (68) Fillet (70) (100) Deflector Screen (94) Stop

Claims (7)

[Scope of utility model registration request] [Claim 1] A wiping side (3) that comes into contact with the surface to be wiped.
8) with a scraper strip (34) fixed to an arm pivotably mounted on the vehicle, said scraper strip (34), if possible via at least one mounting bar;
at least one supporting brace (50) (80), and at least one of said braces (50) (80) or, if necessary, at least one of said mounting bars, or both, has a U-shaped cross section. The concave portion of this U-shaped cross section is attached to the scraper.
a spine (56) facing the strip (34) and supported in this recess by a member (56) (126) having a U-shaped cross section and forming a projection facing in the opposite direction of said scraper strip (34); 64)(94)(134) In an automobile wiper blade having at least one of the braces (50)(80) or, if necessary, at least one of the mounting bars (30).
One or both deflector screens (70) projecting in the direction of the scraper strip (34).
A wiper blade characterized by having 00)(140). [Claim 2] Deflector screen (70) (100) (140) of a brace (50) (80) or mounting bar with a U-shaped cross section.
Wiper blade according to claim 1, characterized in that the U-shaped cross section is arranged in an extension of one side (52), (82), (122). [Claim 3] A portion (66) of a portion of the spine (64) opposite to the U-shaped cross-sectional web (56) that supports this spine.
A wiper blade according to claim 1 or 2, wherein the wiper blade is attached to at least one of the edges of the web (56) by a fillet (68). [Claim 4] The spine (94) is a U combined with this spine.
One side of a brace or mounting bar with a glyph-shaped cross section
The wiper blade according to claim 1 or 2, wherein the wiper blade is supported by (84). 5. A wiper blade according to claim 1, wherein the spine (94) comprises a blade with flat, substantially parallel surfaces. 6. A wiper blade according to claim 1, wherein the spine (94) is attached to a brace (80) or a corresponding mounting bar. 7. A wiper blade according to claim 1, wherein the spine (64) (134) is formed in one piece with a brace (50) or a corresponding mounting bar.