JP3430885B2 - Automotive wiper - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an automobile wiper,
In particular, the present invention relates to a vehicle wiper suitable for use in a so-called concealed wiper type vehicle in which the upper portion of the wiper unit is covered by the rear end portion of the engine hood.

[0002]

SUMMARY OF THE INVENTION In a concealed wiper type vehicle, the rear end of the engine hood extends to near the lower side of the front window panel to cover the upper portion of the wiper unit, The rear end of the engine hood comes close to the upper end of the wiper pivot of the wiper unit, so that when a collision load is applied to the rear end of the engine hood from above during a vehicle collision, the rear end of the engine hood is However, it is undeniable that the bumps collide with the wiper pivot and its downward deformation is restricted, and the collision energy absorption amount decreases.

Therefore, according to the present invention, when a collision load is applied to the rear end portion of the engine hood from above, the wiper pivot does not restrict downward deformation of the rear end portion of the engine hood, and the collision energy is absorbed. An object of the present invention is to provide an automobile wiper capable of improving the characteristics.

[0004]

According to the invention of claim 1, a pivot holder fastened and fixed to a vehicle body panel,
A wiper for an automobile, comprising a wiper pivot fixed to a lower end of a pivot arm and rotatably mounted in a bearing hole of the pivot holder, wherein the wiper pivot is loaded on the wiper pivot from above at a predetermined value or more in an axial direction. configuration but when applied, the wiper pivot mounted slidably in the axial direction to lower the detached from the pivot holder
The wiper pivot at the lower end
Attach the arm to the bearing hole of the pivot holder from below.
It is inserted and rotatably supported, and the pivot ho
A cylindrical first pivot fixed to the rudder, and the first pivot
The second pivot that fits into the pivot and has its upper end protruding upward
And a plurality of first pivots on the inner periphery of the first pivot.
While the second pivot is provided with
The projection is provided with a concave portion, and the projection and the concave portion
The first pivot and the second pivot are non-rotatably engaged and connected with each other.
At the same time, the second pivot has a projecting edge above the recess.
As a boundary, acts on the second pivot from above in the axial direction
The projection of the first pivot is the edge when the load exceeds a predetermined value.
Allows the second pivot to slide downward over the section
The feature is that a vertical groove is formed .

[0005]

[0006]

[0007]

According to a second aspect of the present invention, there is provided a pivot holder which is fastened and fixed to the vehicle body panel, and a wiper pivot which is fixed to a lower end of the pivot arm and is rotatably mounted in a bearing hole of the pivot holder. In an automobile wiper, the wiper pivot is axially slidably attached to a lower side where the wiper pivot is disengaged from the pivot holder when a load of a predetermined value or more acts on the wiper pivot in the axial direction from above. In the configuration, at the lower end of the wiper pivot, an annular groove is provided in a portion projecting downward from the bearing hole of the pivot holder, while a bracket piece is fixed to the pivot holder, and an end edge of the bracket piece is fixed. The wiper pivot is engaged with the annular grooves, and the bracket groove is engaged with the wiper pivot so that the wiper pivot is positioned above the wiper pivot. For a given value or more load operating in the axial direction, the wiper pivot is characterized in that tanning retaining detachably downward from the pivot holder.

[0009]

According to a third aspect of the present invention, there is provided a pivot holder which is fastened and fixed to the vehicle body panel, and a wiper pivot which is fixed to a lower end of the pivot arm and is rotatably mounted in a bearing hole of the pivot holder. In an automobile wiper, the wiper pivot is axially slidably attached to a lower side where the wiper pivot is disengaged from the pivot holder when a load of a predetermined value or more acts on the wiper pivot in the axial direction from above. The upper end of the wiper pivot is provided with an annular groove in a portion protruding upward from the bearing hole of the pivot holder, and the retaining ring of the retaining ring is engaged with the retaining groove of the retaining ring. Engage the upper hole edge of the bearing hole to prevent the wiper pivot from coming off, and engage the locking piece of the coming-off prevention ring with the upper part of the wiper pivot. It is characterized in that a frangible portion breakable for a given value or more load operating in the axial direction.

According to a fourth aspect of the present invention, there is provided a pivot holder which is fastened and fixed to the vehicle body panel, and a wiper pivot which is fixed to a lower end of the pivot arm and is rotatably mounted in a bearing hole of the pivot holder. In an automobile wiper, the wiper pivot is axially slidably attached to a lower side where the wiper pivot is disengaged from the pivot holder when a load of a predetermined value or more acts on the wiper pivot in the axial direction from above. The upper end of the wiper pivot is provided with an annular groove in a portion projecting upward from the bearing hole of the pivot holder, and a lower edge of the annular groove is aligned with an upper hole edge of the bearing hole. A flat washer is formed across the step and the upper hole edge of the bearing hole, while a retaining ring is attached to the annular groove to prevent the retaining. Engaging the ring on the inner peripheral edge of the flat washer to prevent the wiper pivot from coming out, and the flat washer is prevented from coming off with respect to the load of a predetermined value or more acting on the wiper pivot from above in the axial direction. It is characterized in that it can be broken at the upper edge of the hole.

[0012]

According to the invention described in claim 1 , when the wiper unit is adopted in the vehicle of the concealed wiper type, a collision load acts from above on the rear end portion of the engine hood when the vehicle collides. , The rear end portion of the wiper pivot is deformed downward and interferes with the upper end of the wiper pivot, but the wiper pivot is disengaged from the pivot holder in the axial direction downward when a collision load of a predetermined value or more acts in the axial direction from above the wiper pivot. It is possible to increase the collision energy absorption characteristics because the rear end of the engine hood can be freely deformed downward and the crushing deformation stroke of the rear end of the engine hood can be increased. In particular, the wiper pivot is composed of a cylindrical first pivot in which the wiper pivot is non-rotatably coupled and a second pivot, and the second pivot can be operated under a load of a predetermined value or more. Because you have to be slid towards, it can be easily configured the movable means sinking of the wiper pivot.

[0013]

According to the second aspect of the present invention, when the wiper unit is adopted in the concealed wiper type vehicle, when a collision load acts from above on the rear end portion of the engine hood when the vehicle collides, The rear end portion of the wiper pivot deforms downward and interferes with the upper end of the wiper pivot.However, when a collision load of a predetermined value or more acts in the axial direction from above the wiper pivot, the wiper pivot is slid axially downward from the pivot holder. It is possible to increase the crushing deformation stroke of the rear end of the engine hood by moving it and sinking downward so that the rear end of the engine hood can be freely deformed downward.
Collision energy absorption characteristics can be improved. Further, the retractable moving means of the wiper pivot can be easily configured by attaching the bracket piece.

[0015]

[0016]

[0017]

According to the third aspect of the present invention, when the wiper unit is adopted in the concealed wiper type vehicle, when a collision load acts from above on the rear end portion of the engine hood when the vehicle collides, The rear end portion of the wiper pivot deforms downward and interferes with the upper end of the wiper pivot.However, when a collision load of a predetermined value or more acts in the axial direction from above the wiper pivot, the wiper pivot is slid axially downward from the pivot holder. It is possible to increase the crushing deformation stroke of the rear end of the engine hood by moving it and sinking downward so that the rear end of the engine hood can be freely deformed downward.
Collision energy absorption characteristics can be improved. Further, the sinking movable means of the wiper pivot can be easily configured by providing the easily breakable portion on the locking piece of the retaining ring.

Further, since the retaining ring itself can constitute the sinking movable means and the number of parts does not increase, the cost can be advantageously obtained.

According to the invention described in claim 4 , when the wiper unit is adopted in the vehicle of the concealed wiper type, when a collision load acts on the rear end portion of the engine hood from above when the vehicle collides, The rear end portion of the wiper pivot deforms downward and interferes with the upper end of the wiper pivot.However, when a collision load of a predetermined value or more acts in the axial direction from above the wiper pivot, the wiper pivot is slid axially downward from the pivot holder. It is possible to increase the crushing deformation stroke of the rear end of the engine hood by moving it and sinking downward so that the rear end of the engine hood can be freely deformed downward.
Collision energy absorption characteristics can be improved. Further, the sinker movable means of the wiper pivot can be easily configured by disposing the flat washer provided along with the retaining ring and selecting the material of the flat washer, and further, the number of parts is increased. Since it does not exist, it can be obtained at a cost advantage.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the mounted state of the pivot holder 1 of the wiper unit, and FIG. 2 shows the pivot holder 1.
2 shows the wiper pivot 4 attached to the.

In the pivot holder 1, the base portion 2 is superposed on the back surface of the vehicle body panel, for example, the cowl top panel 30,
The cowl top panel 30 is fastened and fixed with bolts 31 and nuts 32.

The wiper pivot 4 is the pivot holder 1
Is rotatably supported in the bearing hole 3 of the above, and a pivot arm 5 connected to a drive transmission link of a wiper motor (not shown) is fixed to the lower end thereof.

The wiper pivot 4 is composed of a cylindrical first pivot 4A having the lower end of the pivot arm 5 fixed by caulking, and a second pivot 4B inserted into the first pivot 4A.

The first pivot 4A is inserted into the bearing hole 3 of the pivot holder 1 from below, and the upper end of the first pivot 4A is retained by a retaining ring 7 and a flat washer 8.

On the inner circumference of the upper end of the first pivot 4A, a plurality of protrusions 9 are provided on the same circumference, for example.

The second pivot 4B is fitted in the upper half of the first pivot 4A so that the upper end thereof is arranged so as to project upward, and the wiper arm 25 is connected to the projecting portion.

On the peripheral surface of the second pivot 4B, a recess 10 is formed at a portion corresponding to the projection 9, and the projection 9 and the recess 10 are engaged with each other to form the first pivot 4A and the second pivot 4A.
The pivot 4B is non-rotatably engaged and connected.

Also, the recess 1 of the second pivot 4B.
A vertical groove 11 is formed on the upper side of 0 with the projecting edge 10a as a boundary. When a load of a predetermined value or more acts on the second pivot 4B from above in the axial direction, the projection 9 causes the projecting edge 10a to move.
The second pivot 4 overcoming a and falling into the vertical groove 11
B is allowed to slide downward.

In FIG. 1, 8A indicates a spring washer.

According to the structure of the first embodiment described above, when the above-mentioned wiper unit is adopted in the vehicle of the concealed wiper type, the rear end portion of the engine hood 12 is near the lower side portion of the front window panel (not shown). The upper portion of the wiper unit is covered with the rear end of the engine hood 12 so that the upper end of the second pivot 4B of the wiper pivot 4 is close to the lower surface of the rear end of the engine hood 12. Become.

Therefore, when a collision load is applied to the rear end of the engine hood 12 from above during a vehicle collision or the like, the rear end of the engine hood 12 is deformed downward and interferes with the upper end of the second pivot 4B. However, when a collision load of a predetermined value or more is applied to the second pivot 4B from above, the protrusion 9 of the first pivot 4A and the upper edge 10a of the recess 10 of the second pivot 4B are vertically opposed to each other. As the projection 9 falls over the vertical groove 11 adjacent to the upper side of the recess 10 by overcoming, the second pivot 4B slides downward and sinks, freeing the downward deformation of the rear end portion of the engine hood 12.

As a result, the downward crushing deformation stroke of the rear end portion of the engine hood 12 can be increased,
Collision energy absorption characteristics can be improved.

In particular, in the first embodiment, the cylindrical first pivot 4A in which the wiper pivot 4 is connected non-rotatably.
And the second pivot 4B, the second pivot 4B slides downward and sinks with a collision load of a predetermined value or more. Therefore, the sinker moving means of the wiper pivot 4 can be simply configured. You can

3 and 4 show a second embodiment of the present invention, in which the wiper pivot 4 is replaced by a cylindrical first pivot 4A.
And the second pivot 4 inserted and arranged in the first pivot 4A.
B, and the first pivot 4A is rotatably disposed in the bearing hole 3 of the pivot holder 1 and is retained therein,
Similar to the first embodiment, the upper end of the second pivot 4B is projected upward from the upper end of the second pivot 4A to connect the wiper arm 25.

Here, tooth portions 13A and 13B such as serrations or splines are formed on the inner circumference of the first pivot 4A and the outer circumference of the second pivot 4B, and these tooth portions 13A and 1B are formed.
3B makes the first pivot 4A and the second pivot 4B non-rotatable, and the first pivot 4 is applied to the second pivot 2 from above against a load of a predetermined value or more acting in the axial direction.
A and the second pivot 4B are meshed with each other so as to be slidable relative to each other in the axial direction.

Therefore, also in the case of the second embodiment, as in the case of the first embodiment, a collision load acts on the rear end portion of the engine hood 12 from above when the vehicle collides, and the rear end portion is lowered. When it deforms to interfere with the upper end of the second pivot 4B and a collision load of a predetermined value or more acts on the second pivot 4B,
The second pivot 4B slides downward with respect to the first pivot 4A and sinks, increasing the downward crushing deformation stroke of the rear end portion of the engine hood 12 and improving the collision energy absorption characteristics.

Further, the wiper pivot 4 has a cylindrical first shape.
The second pivot 4A is composed of a pivot 4A and a second pivot 4B, which are engaged with each other by serration fitting or spline fitting so as to be slidable in the axial direction under a predetermined load condition. Since the sinking of 4B can be performed, the sinking means of the wiper pivot 4 can be easily configured.

FIG. 5 shows a third embodiment of the present invention.

In this third embodiment, the wiper pivot 4
Is formed into a cylindrical shape, is rotatably inserted in the bearing hole 3 of the pivot holder 1 and is retained in the bearing hole 3 of the pivot holder 1, and the first pivot 4A is inserted into the first pivot 4A. It is similar to the first and second embodiments in that it is configured with a second pivot 4B that projects from the upper end and connects the wiper arm 25, but the first pivot 4A has a large diameter at the lower end on the inner circumference. On the other hand, the second pivot 4B is tapered so that the upper end side has a small diameter.

The pivot arm 5 is fixed to the lower end of the second pivot 4B, and the second pivot 4B is inserted from the lower side of the first pivot 4A, and the first pivot 4A and the second pivot 4A are inserted.
When a load of a predetermined value or more is applied to the second pivot 4B from above in the axial direction due to heat caulking or interference fitting with the pivot 4B, the second pivot 4B can be separated from the first pivot 4A downward. It is press-fitted and connected integrally.

Therefore, in the structure of the third embodiment, in the normal state, the first pivot 4A and the second pivot 4B are non-rotatably coupled, but the rear end of the engine hood 12 is in the event of a vehicle collision or the like. A collision load acts on the portion from above, the rear end portion deforms downward and interferes with the upper end of the second pivot 4B,
When a collision load of a predetermined value or more is applied to the second pivot 4B, the second pivot 4B separates from the first pivot 4A downward and sinks, causing a downward crushing deformation stroke of the rear end portion of the engine hood 12. It is possible to increase the collision energy absorption characteristics and improve the collision energy absorption characteristics.

Also in the case of the third embodiment, the wapper pivot 4 is composed of the cylindrical first pivot 4A and the second pivot 4B, and these two parts are taper-fitted to each other under predetermined load conditions. 2 pivot 4B is the first pivot 4
Since the second pivot 4B is detachably coupled to the lower side from A so that the second pivot 4B can be depressed, the depression means of the wiper pivot 4 can be simply configured.

FIG. 6 shows a fourth embodiment of the present invention. The wiper pivot 4 is inserted into the bearing hole 3 of the pivot holder 1 from below and is rotatably supported in the bearing hole 3. .

An annular groove 14 is formed in the lower end portion of the wiper pivot 4 in a portion protruding downward from the bearing hole 3.

A bracket piece 15 is fastened and fixed to the lower surface of the base portion 2 of the pivot holder 1 by a bolt 31 via a vibration-proof bush 16.

Then, the end edge of the bracket piece 15 is engaged with the annular groove 14, and the engagement of the annular groove 14 and the bracket piece 15 causes the wiper pivot 4 to move axially from above the wiper pivot 4. The wiper pivot 4 is detachably retained from the bearing hole 3 of the pivot holder 1 against a load of a predetermined value or more that acts.

In the case of this embodiment, the spring washer 8A is interposed between the lower hole edge of the bearing hole 3 and the tip of the bracket piece 15, and the wiper pivot 4 and the pivot holder 1 are provided.
It is avoiding rattling.

According to the structure of the fourth embodiment, a collision load acts on the rear end portion of the engine hood 12 from above at the time of a vehicle collision or the like, and the rear end portion is deformed downward so that the wiper pivot 4 of the wiper pivot 4 moves. When the wiper pivot 4 interferes with the upper end and a collision load of a predetermined value or more is applied to the wiper pivot 4, the upper edge of the annular groove 14 pushes down the end edge of the bracket piece 15 to deform the annular groove 14.
And the bracket piece 15 are disengaged from each other, and the wiper pivot 4 is disengaged from the bearing hole 3 and slides downward to sink, thereby increasing the downward crush deformation stroke of the rear end portion of the engine hood 12. Collision energy absorption characteristics can be improved.

Further, in the fourth embodiment, the sinking movable means of the wiper pivot 4 can be easily constructed by attaching the bracket piece 15.

FIG. 7 shows a fifth embodiment of the present invention. In the lower part of the bearing hole 3 of the pivot holder 1, a plurality of spring pieces 17 whose lower ends float up toward the center of the bearing hole 3.
On the other hand, the lower end portion of the wiper pivot 4 slidingly contacting the spring piece 17 is formed with a taper portion 18 having a smaller diameter on the lower end side, and the taper portion 18 is engaged with the spring piece 17. The engagement between the tapered portion 18 and the spring piece 17 allows the wiper pivot 4 to be disengaged from the pivot holder 1 with respect to a load of a predetermined value or more that acts on the wiper pivot 4 from above in the axial direction. It has been pulled out.

Therefore, according to the structure of the fifth embodiment, the collision load acts on the rear end portion of the engine hood 12 from above when the vehicle collides, and the rear end portion is deformed downward to cause the wiper pivot. When the wiper pivot 4 is interfered with by the upper end of the wiper pivot 4 and a collision load of a predetermined value or more is applied to the wiper pivot 4, the taper portion 18 of the wiper pivot 4 spreads the spring piece 17 of the bearing hole 3 so that the wiper pivot 4 causes the bearing hole 3 to move. It is possible to improve the collision energy absorption characteristics by sliding downward and sunk, and increasing the downward crushing deformation stroke of the rear end portion of the engine hood 12.

Further, since the collision energy can be absorbed by the expanding action of the spring piece 17 by the taper portion 18, the collision energy absorption characteristic can be further improved.

Further, since a dedicated retaining component for retaining the wiper pivot 4 can be dispensed with, the cost can be advantageously obtained.

FIGS. 8 and 9 show a sixth embodiment of the present invention. In this embodiment, like the normal wiper pivot retaining means, the upper end portion of the wiper pivot 4 extends from the bearing hole 3 of the pivot holder 1. An annular groove 19 is provided in a portion projecting upward, and a retaining ring 7 having a plurality of locking pieces 7a on the inner circumference, which is generally called a C ring, is provided in the annular groove 19.
The engaging piece 7a is fitted and engaged with the annular groove 19 and a flat washer 8 is interposed between the retaining ring 7 and the upper hole edge of the bearing hole 3 to prevent these retaining. The wiper pivot 4 is retained by the ring 7 and the flat washer 8.

Here, the locking piece 7a of the retaining ring 7 is
The easily rupturable portion 2 that can be ruptured when a load of a predetermined value or more acts on the wiper pivot 4 from above in the projecting base portion in the axial direction.
0 is set.

The easily breakable portion 20 can be constructed by forming a notch to thin the protruding base portion of the locking hole 7a.

Therefore, according to the structure of the sixth embodiment, the collision load acts on the rear end portion of the engine hood 12 from above at the time of a vehicle collision or the like, and the rear end portion is deformed downward to cause the wiper pivot. When the wiper pivot 4 is interfered with by the upper end of 4 and a collision load of a predetermined value or more is applied to the wiper pivot 4, the collision load of the retaining ring 7a of the retaining ring 7 is caused by the upper end of the annular groove 19 and the inner peripheral edge of the flat washer 8. It acts as a shearing load on the easily breakable portion 20, and the locking piece 7a is broken and separated from the easily breakable portion 20.

As a result, the wiper pivot 4 moves into the bearing hole 3
It is possible to improve the collision energy absorption characteristics by sliding downward and sunk, and increasing the downward crushing deformation stroke of the rear end portion of the engine hood 12.

Further, according to the sixth embodiment, as described above, the retractable moving means of the wiper pivot 4 is easily constituted by providing the easily breakable portion 20 on the locking piece 7a of the retaining ring 7. Further, since the retaining ring 7 itself can constitute the sinking movable means and the number of parts does not increase, the cost can be advantageously obtained.

FIG. 10 shows a seventh embodiment of the present invention, in which the wiper pivot 4 is retained by a retaining ring 7 engaged with an annular groove 19 at the upper end of the wiper pivot 4 and a flat washer 8. The basic retaining structure is similar to that of the sixth embodiment.

Here, the upper protruding portion of the wiper pivot 4 is formed to have a small diameter, and the annular groove 19 is formed in the small diameter portion, and the lower edge of the annular groove 19 is provided with the upper hole edge and the surface of the bearing hole 3. An annular step portion 21 is formed so as to be aligned with one another, and the outer peripheral edge portion of the retaining ring 7 is projected above the step portion 21 in a jaw shape.

On the other hand, the flat washer 8 is formed in such a size that it can be disposed over the upper hole edge of the bearing hole 3 and the step portion 21.
At the stepped portion 21, a retaining ring 7 is engaged on the inner peripheral edge of the flat washer 8 to retain the wiper pivot 4.

The flat washer 8 is made of a material having a relatively high hardness but brittleness, such as a fiber reinforced resin or a light metal die casting material, and is subjected to a load of a predetermined value or more which acts on the wiper pivot 4 from above in the axial direction. On the other hand, the flat washer 8 is configured so that it can be broken by the retaining ring 7 and the upper hole edge of the bearing hole 3.

In FIG. 10, reference numeral 22 designates a sealing boot mounted so as to cover the disposition portion of the retaining ring 7.

Therefore, according to the structure of the seventh embodiment, the collision load acts from above on the rear end portion of the engine hood 12 at the time of a vehicle collision or the like, and the rear end portion is deformed downward to cause the wiper pivot. When the wiper pivot 4 is interfered with by the upper end of 4 and a collision load of a predetermined value or more is applied to the wiper pivot 4, the collision load is sheared by the flat washer 8 by the lower outer peripheral edge of the retaining ring 7 and the upper hole edge of the bearing hole 3. The flat washer 8 breaks by acting as a load.

As a result, the wiper pivot 4 moves into the bearing hole 3
It is possible to improve the collision energy absorption characteristics by sliding down inward and sinking, increasing the downward crushing deformation stroke of the rear end portion of the engine hood 12.

Further, according to the seventh embodiment, the retractable moving means of the wiper pivot 4 can be easily arranged by the arrangement of the washer 8 provided along with the retaining ring 7 and the selection of the material of the flat washer 8. Can be configured and yet
Since there is no increase in the number of parts, the cost can be advantageously obtained.

Further, when the retaining ring 7 is constructed so as to be broken and deformed as in the sixth embodiment, the retaining ring 7 is
When the stopper ring 7 is formed of a material having high hardness and brittleness, the stopper ring 7 may be broken when the stopper ring 7 is fitted into the annular groove 19, so that the stopper ring 7 is relatively elastic. However, with such a structure, the rigidity against the axial load that the wiper pivot 4 receives when the wiper operates is reduced.
However, by adopting a structure in which the flat washer 8 is broken as in the seventh embodiment, the flat washer 8 is attached when the pivot shaft is attached while using a material having high hardness and brittleness.
There is no fear that the wiper will be broken, and the rigidity of the wiper pivot in the four axial directions when the wiper is activated can be sufficiently secured.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the wiper pivot according to the same embodiment.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

4 is a sectional view taken along the line AA of FIG.

FIG. 5 is a sectional view showing a third embodiment of the present invention.

FIG. 6 is a sectional view showing a fourth embodiment of the present invention.

FIG. 7 is a sectional view showing a fifth embodiment of the present invention.

FIG. 8 is a sectional view showing a sixth embodiment of the present invention.

FIG. 9 is a plan view of the retaining ring of the same embodiment.

FIG. 10 is a sectional view showing a seventh embodiment of the present invention.

[Explanation of symbols]

1 ... Pipot holder 3 ... Bearing hole 4 ... Wiper pivot 4A ... 1st pivot 4B ... second pivot 5 ... Pivot arm 7 ... retaining ring 7a ... Locking hole 8 ... Flat washer 9 ... Protrusion 10 ... Recess 10a ... Edge portion 11 ... Vertical groove 15 ... Bracket piece 17 ... Spring piece 18 ... Tapered part 19 ... Annular groove 20 ... Easy break 21 ... Step

Continuation of the front page (56) References JP-A-6-206518 (JP, A) JP-A-4-283154 (JP, A) JP-A-2-133271 (JP, A) Actual development Sho-50-8628 (JP , U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60S 1/00-1/68

Claims (4)

(57) [Claims] 1. A wiper for an automobile, comprising: a pivot holder fastened and fixed to a vehicle body panel; and a wiper pivot fixed to a lower end of a pivot arm and rotatably mounted in a bearing hole of the pivot holder. The wiper pivot has a structure in which the wiper pivot is disengaged from the pivot holder so as to be slidable in the axial direction downward when a load of a predetermined value or more is applied to the wiper pivot from above. Is fixed to the lower end of the pivot arm, is inserted into the bearing hole of the pivot holder from the lower side and is rotatably supported, and the cylindrical first pivot fixed to the pivot holder and the first pivot The first pivot is composed of a second pivot that fits into the first pivot and has its upper end projecting upward, and the first pivot has a plurality of protrusions on its inner circumference. On the other hand, the second pivot is provided with a concave portion with which the projection engages on the peripheral surface thereof, and the projection and the concave portion engage the first pivot and the second pivot in a non-rotatable manner and connect the second pivot to the second pivot. The protrusion of the first pivot surpasses the projecting edge portion above the concave portion, and the second pivot pivots over the projecting edge portion against a load of a predetermined value or more acting on the second pivot in the axial direction from above. A wiper for an automobile, characterized in that a vertical groove is formed to allow the sliding of the lower part of the wiper. 2. A windshield wiper for an automobile, comprising: a pivot holder fastened and fixed to a vehicle body panel; and a wiper pivot fixed to a lower end of a pivot arm and rotatably mounted in a bearing hole of the pivot holder. The wiper pivot has a structure in which the wiper pivot is disengaged from the pivot holder so as to be slidable in the axial direction downward when a load of a predetermined value or more is applied to the wiper pivot from above. At the lower end of the, while the annular groove is provided in the portion protruding downward from the bearing hole of the pivot holder, the bracket holder is fixed to the pivot holder, and the end edge of the bracket piece is engaged with the annular groove. A predetermined value that acts on the wiper pivot in the axial direction from above by the engagement of the annular groove and the bracket piece. A wiper for an automobile, wherein the wiper pivot is detachably retained downward from the pivot holder against the above load. 3. A wiper for an automobile, comprising a pivot holder fastened and fixed to a vehicle body panel, and a wiper pivot rotatably mounted in a bearing hole of the pivot holder by fixing a pivot arm to a lower end of the wiper pivot. The wiper pivot has a structure in which the wiper pivot is disengaged from the pivot holder so as to be slidable in the axial direction downward when a load of a predetermined value or more is applied to the wiper pivot from above. An annular groove is provided in the upper end portion of the pivot holder at a portion projecting upward from the bearing hole of the pivot holder, and the retaining piece of the retaining ring is engaged with the annular groove, and the retaining ring is connected to the upper hole edge of the bearing hole. To prevent the wiper pivot from being pulled out, and to prevent the wiper pivot from engaging with the locking piece at a predetermined value or more that acts on the wiper pivot in the axial direction from above. A wiper for an automobile, which is provided with an easily breakable portion that can be broken by an upper load. 4. A wiper for an automobile, comprising a pivot holder fastened and fixed to a vehicle body panel, and a wiper pivot fixed to a lower end of a pivot arm and rotatably mounted in a bearing hole of the pivot holder. The wiper pivot has a structure in which the wiper pivot is disengaged from the pivot holder so as to be slidable in the axial direction downward when a load of a predetermined value or more is applied to the wiper pivot from above. An annular groove is provided at an upper end portion of the pivot holder in a portion projecting upward from the bearing hole of the pivot holder, and an annular step portion is formed at a lower edge of the annular groove so as to be aligned with an upper hole edge of the bearing hole. While a flat washer is arranged across the portion and the upper hole edge of the bearing hole,
A retaining ring is attached to the annular groove, and the retaining ring is engaged with the inner peripheral edge of the flat washer to retain the wiper pivot, and the wiper pivot is axially acted from above a predetermined value or more. The wiper for an automobile, wherein the flat washer can be broken by the retaining ring and the upper hole edge of the bearing hole against the load.