Patent Description:
Generally, car windscreen wipers need to be assembled on outer sides of car windscreens by connecting wiper driving arms. The wiper driving arms exert force on wiper rubber strips (or blades) to scrape off the rain or stains on glass surfaces by driving the wipers to swing back and forth on the glass surfaces.

Furthermore, the wiper driving arm is usually mounted and fixed on a wiper base assembly structure. There are a variety of wiper driving arms provided by automobile manufacturers to match different automobile model. Therefore, in order to accommodate all kinds of wiper driving arms, the wipers need various specific base assembly structure. As a result, most windscreen wiper manufacturers provide multiple base assemblies to allow users to choose a suitable base assembly for assembling. However, this not only increases an overall price of the wiper, but also wastes components, which is a problem needs to be solved. <CIT> shows a wiper base assembly structure of the prior art.

In light of the above, the inventor of the present disclosure has devoted himself to doing research and studying scientific principles so as to solve the above problem of related art.

It is an objective of the present disclosure to provide a universal wiper base assembly structure. A variety of the wiper driving arms may be positioned through the fastening base being selectively coupled with the rear base, the combination base, or/and the outer cover to increase conveniences during using.

Accordingly, the present disclosure provides a universal wiper base assembly structure for accommodating a variety of wiper driving arms, the universal wiper base assembly including: a fastening base, a rear base, a combination base, and an outer cover. The fastening base includes a main body and a decorative cover. The main body includes a coupling hole defined at a bottom, an insertion slot defined at a top, a protruding platform, a positioning protrusion disposed on the protruding platform, a first shaft hole defined at a lateral side, two limiting arc surfaces disposed on opposite sides, and a plurality of engagement grooves defined on a bottom surface. The decorative cover is rotatably connected to a front side of the main body and includes a fastening slot. The rear base includes two contact blocks disposed on opposite sides, a top abutting block abutting against the positioning protrusion, a trench defined in front of the top abutting block, and two hooks disposed in front of the top abutting block. The rear base is detachably coupled to a rear side of the main body through the two hooks being engaged with the main body. The combination base is detachably coupled to a top surface of the main body and positioned in the trench. The combination base includes two side plates, a connection plate located between the two side plates, and an open groove defined at a position corresponding to the protruding platform and the positioning protrusion. Each of the side plates includes a second shaft hole defined at a position corresponding to the first shaft hole. The outer cover includes a fastening block, an opening exposing the protruding platform and the positioning protrusion and a third shaft hole defined at a position corresponding to one of the second shaft holes. The outer cover is removably fixed to the combination base by the fastening block being engaged with the fastening slot. The variety of the wiper driving arms are positioned through the fastening base selectively being coupled with the rear base, the combination base, or/and the outer cover.

Comparing with the related art, the universal wiper base assembly structure of the present application includes a fastening base, a rear base, a combination base, and an outer cover. The fastening base includes positioning structures such as a coupling hole, an insertion slot, a protruding platform, a positioning protrusion, a first shaft hole, multiple limiting arc surfaces, multiple engagement grooves, and a fastening slot. The rear base includes positioning structures such as multiple contact blocks, a top abutting block, and two hooks. The combination base includes an open groove and a second shaft hole. The outer cover includes a fastening block, an opening, and a third shaft hole. Accordingly, a variety of wiper driving arms may be positioned through the fastening base being selectively coupled with the rear base, the combination base, or/and the outer cover, so as to improve the convenience in assembling and reduce an overall cost of the wiper.

A detailed description and technical content of the present disclosure are provided below with reference to accompanying drawings. However, the accompanying drawings are only for illustrative purposes and are not intended to limit the present disclosure.

Please refer to <FIG>, which are perspective exploded views showing a universal wiper base assembly structure of the present disclosure viewed from two side directions and a perspective appearance view showing the universal wiper base assembly structure of the present disclosure. The present disclosure is a universal wiper base assembly structure <NUM>, which includes a fastening base <NUM>, a rear base <NUM>, a combination base <NUM>, and an outer cover <NUM>. The rear base <NUM>, the combination base <NUM>, and the outer cover <NUM> may be selectively coupled to the fastening base <NUM>, so as to position and couple a variety of wiper driving arms. A more detailed description of the universal wiper base assembly structure <NUM> is provided below.

The fastening base <NUM> includes a main body <NUM> and a decorative cover <NUM>. The main body <NUM> includes a coupling hole <NUM> at a bottom, an insertion slot <NUM> at a top, a protruding platform <NUM>, a positioning protrusion <NUM> arranged on the protruding platform <NUM>, a first shaft hole <NUM> at a lateral side, two limiting arc surfaces <NUM> disposed on opposite sides, and a plurality of engagement grooves <NUM> on a bottom surface. Moreover, the decorative cover <NUM> is rotatably connected to a front side of the main body <NUM> and includes a fastening slot <NUM>.

Specifically, the main body <NUM> is provided with an engagement plate <NUM> in front of each of the limiting arc surfaces <NUM>. Moreover, the decorative cover <NUM> includes two wing plates <NUM>. Each of the wing plates <NUM> is provided with an engagement slot <NUM>. The decorative cover <NUM> is fastened to the main body <NUM> through the engagement slots <NUM> being engaged with the engagement plates <NUM> (see also <FIG>). In addition, each wing plate <NUM> includes a positioning arc surface <NUM>. Each of the limiting arc surfaces <NUM> abuts against the positioning arc surface <NUM> of one of the wing plates <NUM>.

The rear base <NUM> includes two contact blocks <NUM> disposed on opposite sides, a top abutting block <NUM> abutting against the positioning protrusion <NUM>, a trench <NUM> defined in front of the top abutting block <NUM>, and two hooks <NUM> arranged in front of the top abutting block <NUM>. The rear base <NUM> is detachably coupled to a rear side of the main body <NUM> through the two hooks <NUM> being engaged with the main body <NUM>.

In detail, the main body <NUM> is provided with two insertion grooves <NUM> defined on a rear side of the positioning protrusion <NUM>. Moreover, the rear base <NUM> is provided with two insertion plates <NUM> disposed on one side of the trench <NUM>. The two insertion plates <NUM> are inserted in the two insertion grooves <NUM>. Moreover, the rear base <NUM> includes two abutting surfaces <NUM> located in front of the two abutting blocks <NUM>. An insertion recess <NUM> contacting a sidewall of the main body <NUM> is defined between each of the abutting surfaces <NUM> and each of the insertion plates <NUM>.

In the present embodiment, the main body <NUM> includes two blocking plates <NUM> disposed on two sides of the protruding platform <NUM>. Further, an end surface of the rear base <NUM> abuts against the two blocking plates <NUM>.

Moreover, the combination base <NUM> is detachably coupled to a top surface of the main body <NUM> and positioned in the trench <NUM>. The combination base <NUM> includes two side plates <NUM>, a connection plate <NUM> located between the two side plates <NUM>, and an open groove <NUM> defined at a position corresponding to the protruding platform <NUM> and the positioning protrusion <NUM>. Each of the side plates <NUM> includes a second shaft hole <NUM> defined at a position corresponding to the first shaft hole <NUM>.

In the present embodiment, the combination base <NUM> is provided with a plurality of protruding ribs <NUM> on inner sides of the two side plates <NUM>. The protruding ribs <NUM> are positioned in the engagement grooves <NUM> of the main body <NUM>.

The outer cover <NUM> covers the combination base <NUM>. The outer cover <NUM> includes a fastening block <NUM>, an opening <NUM> exposing the protruding platform <NUM> and the positioning protrusion <NUM> and a third shaft hole <NUM> defined at a position corresponding to the second shaft hole <NUM>. The decorative cover <NUM> is rotatable toward the main body <NUM>. The outer cover <NUM> is removably fixed to the combination base <NUM> by the fastening block <NUM> being engaged with the fastening slot <NUM> (see <FIG>).

It should be noted that the opening <NUM> of the outer cover <NUM> includes an abutting portion <NUM>. The profile of the abutting portion <NUM> is corresponding to a shape of the top abutting block <NUM>. Accordingly, when the outer cover <NUM> covers the combination base <NUM>, the opening <NUM> encloses and surrounds the protruding platform <NUM>, the positioning protrusion <NUM>, and the top abutting block <NUM>.

Please refer to <FIG> and <FIG>. <FIG> is a schematic assembling view showing that the universal wiper base assembly structure of the present disclosure is coupled to a wiper base, and <FIG> is a perspective appearance view showing a wiper of the present disclosure. The universal wiper base assembly structure <NUM> of the present disclosure is configured to be installed on a wiper base <NUM>. Moreover, the wiper base <NUM> is further combined with a wiper blade <NUM> to form a wiper.

Please refer to <FIG> and <FIG>. <FIG> is a schematic assembling view showing that the universal wiper base assembly structure of the present disclosure is coupled to a first wiper driving arm. <FIG> is a perspective appearance view showing the universal wiper base assembly structure of the present disclosure after assembling. In the present embodiment, the universal wiper base assembly structure <NUM> is structured by combining the rear base <NUM>, the combination base <NUM>, and the outer cover <NUM> with the fastening base <NUM> (see <FIG>). Furthermore, the first wiper driving arm <NUM> includes a first arm body <NUM>, an insertion shaft <NUM> connected to a lateral side of the first arm body <NUM>, and a span arm <NUM> transversely extended from a top surface of the first arm body <NUM>.

In actual assembling, the insertion shaft <NUM> passes through the third shaft hole <NUM>, the second shaft hole <NUM>, and the first shaft hole <NUM>. The first arm body <NUM> abuts against a left side of the fastening base <NUM>, and the span arm <NUM> straddles the outer cover <NUM>. Accordingly, the first wiper driving arm <NUM> is coupled to the universal wiper base assembly structure <NUM> to drive the wiper blade <NUM> to move. It should be noted that the universal wiper base assembly structure <NUM> may also be combined with a right-side-type first wiper driving arm <NUM> to couple the same on a right side of the fastening base <NUM>.

Please continue to refer to <FIG>. <FIG> is a schematic assembling view showing that the universal wiper base assembly structure of the present disclosure is coupled to a second wiper driving arm. <FIG> and <FIG> are perspective appearance views from two side directions, showing that the universal wiper base assembly structure of the present disclosure is coupled to the second wiper driving arm. In the present embodiment, the universal wiper base assembly structure <NUM> is structured by removing the outer cover <NUM> and the rear base <NUM>, and only coupling the combination base <NUM> to the fastening base <NUM>. The positioning protrusion <NUM> protrudes from the open groove <NUM> of the combination base <NUM>. Moreover, a second wiper driving arm 50a includes a second arm body 51a and a shielding cover 52a connected to the second arm body 51a. In addition, a top of the shielding cover 52a is provided with a fastening hole 520a, a bottom of the shielding cover 52a is provided with a plurality of hooks 521a, and a front end of the shielding cover 52a is provided with a plurality of positioning end surfaces 522a.

In actual assembling, the shielding cover 52a covers the combination base <NUM>. The positioning protrusion <NUM> passes through the fastening hole 520a. The hooks 521a on the bottom of the shielding cover 52a are engaged with the engagement grooves <NUM> on the bottom of the fastening base <NUM>, and the decorative cover <NUM> of the fastening base <NUM> presses the shielding cover 52a. Accordingly, the second wiper driving arm 50a is coupled to the universal wiper base assembly structure <NUM> to drive the wiper blade <NUM> to move.

Please refer to <FIG> and <FIG>. <FIG> is a schematic assembling view showing that the universal wiper base assembly structure of the present disclosure is coupled to a third wiper driving arm. <FIG> is a schematic appearance view showing that the universal wiper base assembly structure of the present disclosure is coupled to the third wiper driving arm. In the present embodiment, the universal wiper base assembly structure <NUM> is structured by reserving the fastening base <NUM> and the combination base <NUM>. That is to say, the outer cover <NUM> and the rear base <NUM> are removed from the fastening base <NUM>. Moreover, a third wiper driving arm 50b includes a third arm body 51b, an insertion shaft 52b connected to a lateral side of the third arm body 51b, and a span arm 53b transversely extended from a top surface of the third arm body 51b.

In actual assembling, the insertion shaft 52b passes through the third shaft hole <NUM>, and the third arm body 51b abuts against a left side of the fastening base <NUM>. The span arm 53b straddles the outer cover <NUM>. Accordingly, the third wiper driving arm 50b is coupled to the universal wiper base assembly structure <NUM> to drive the wiper blade <NUM> to move.

Please refer to <FIG>. <FIG> is a schematic assembling view showing that the universal wiper base assembly structure of the present disclosure is coupled to a fourth wiper driving arm. <FIG> and <FIG> are perspective appearance views from two side directions, showing that the universal wiper base assembly structure of the present disclosure is coupled to the fourth wiper driving arm. In the present embodiment, the universal wiper base assembly structure <NUM> is structured by removing the outer cover <NUM> and the combination base <NUM>, and only combining the rear base <NUM> with the fastening base <NUM>. Moreover, the fastening base <NUM> has an insertion slot <NUM>. The rear base <NUM> includes two contact blocks <NUM> and a top abutting block <NUM>. A fourth wiper driving arm 50c includes a fourth arm body 51c, and the fourth arm body 51c is a U-shaped cover. The fourth arm body 51c is provided with a protruding plate 511c, an abutting plate 512c, and a limiting plate 513c. It should be noted that the fourth arm body 51c may be dispensed with the abutting plate 512c.

In actual assembling, the fourth arm body 51c covers the fastening base <NUM> and the rear base <NUM>. The protruding plate 511c of the fourth wiper driving arm 50c is inserted into the insertion slot <NUM> of the fastening base <NUM>, the abutting plate 512c abuts against the top abutting block <NUM>, and the limiting plate 513c abuts against the contact block <NUM>. In addition to that, the decorative cover <NUM> of the fastening base <NUM> presses the shielding cover 52a. Accordingly, the fourth wiper driving arm 50c is coupled to the universal wiper base assembly structure <NUM> to drive the wiper blade <NUM> to move.

Please refer to <FIG>. <FIG> is a schematic assembling view showing that the universal wiper base assembly structure of the present disclosure is coupled to a fifth wiper driving arm. <FIG> and <FIG> are perspective appearance views from two side directions, showing that the universal wiper base assembly structure of the present disclosure is coupled to the fifth wiper driving arm. In the present embodiment, only the fastening base <NUM> is reserved in the universal wiper base assembly structure <NUM>. That is to say, the outer cover <NUM>, the combination base <NUM>, and the rear base <NUM> are removed. Moreover, the fastening base <NUM> includes two limiting arc surfaces <NUM> and a plurality of engagement grooves <NUM> on a bottom surface. In addition, the fifth wiper driving arm 50d includes a fifth arm body 51d and a shielding cover 52d connected to the fifth arm body 51d. The fifth arm body 51d is a U-shaped cover. A top of the cover 52d is provided with a fastening hole 520d, a bottom of the shielding cover 52d is provided with a plurality of hooks 521d, and a front end of the shielding cover 52d is provided with a plurality of positioning end surfaces 522d.

Claim 1:
A universal wiper base assembly structure for accommodating a wiper driving arm, the universal wiper base assembly structure comprising:
a fastening base (<NUM>), comprising a main body (<NUM>) and a decorative cover (<NUM>), wherein the main body (<NUM>) comprises a coupling hole (<NUM>) defined at a bottom thereof, an insertion slot (<NUM>) defined at a top thereof, a protruding platform (<NUM>), a positioning protrusion (<NUM>) disposed on the protruding platform (<NUM>), a first shaft hole (<NUM>) defined at a lateral side thereof, two limiting arc surfaces (<NUM>) disposed on two sides thereof opposite to each other, and a plurality of engagement grooves (<NUM>) defined on a bottom surface thereof, and the decorative cover (<NUM>) is rotatably connected to a front side of the main body (<NUM>) and comprises a fastening slot (<NUM>);
a rear base (<NUM>), comprising two contact blocks (<NUM>) disposed on two sides thereof opposite to each other, a top abutting block (<NUM>) abutting against the positioning protrusion (<NUM>), a trench (<NUM>) defined in front of the top abutting block (<NUM>), and two hooks (<NUM>) disposed in front of the top abutting block (<NUM>), wherein the rear base (<NUM>) is detachably coupled to a rear side of the main body (<NUM>) through the two hooks (<NUM>) being engaged with the main body (<NUM>);
a combination base (<NUM>), detachably coupled to a top surface of the main body (<NUM>) and positioned in the trench (<NUM>), and comprising two side plates (<NUM>), a connection plate (<NUM>) located between the two side plates (<NUM>), and an open groove (<NUM>) defined at a position corresponding to the protruding platform (<NUM>) and the positioning protrusion (<NUM>), wherein each of the side plates (<NUM>) comprises a second shaft hole (<NUM>) defined at a position corresponding to the first shaft hole (<NUM>); and
an outer cover (<NUM>), comprising a fastening block (<NUM>), an opening (<NUM>) exposing the protruding platform (<NUM>) and the positioning protrusion (<NUM>), and a third shaft hole (<NUM>) defined at a position corresponding the second shaft hole (<NUM>), wherein the outer cover (<NUM>) is detachably fixed to the combination base (<NUM>) by the fastening block (<NUM>) being engaged with the fastening slot (<NUM>);
wherein the wiper driving arm is positioned through the rear base (<NUM>), the combination base (<NUM>), or/and the outer cover (<NUM>) being selectively coupled to the fastening base (<NUM>).