JP3445530B2 - Vehicle wiper - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wiper for wiping a windshield glass of an automobile.

[0002]

2. Description of the Related Art In a vehicle wiper for wiping a windshield glass of an automobile, a wiper blade is rotatably held by a wiper arm. Here, generally, a holding clip for holding the blade is supported by a support shaft on the wiper blade, and the U-shaped tip portion of the wiper arm is locked to the holding clip to hold the wiper blade on the wiper arm. It is configured to do.

However, in this type of wiper arm and blade, since the holding clip is interposed in the wiper arm to hold the wiper blade, the number of parts and the number of assembling steps are increased, which causes a high cost.

Therefore, the present applicant has already proposed a vehicle wiper device in which the wiper arm and the wiper blade can be easily assembled and removed and the number of parts can be reduced to reduce the cost (for example, as an example). Japanese Patent Application No. 11-
No. 81726, Japanese Patent Application No. 11-81732, etc.).

In the proposed vehicle wiper device, the support shaft is directly bridged between the widthwise both side walls of the wiper blade, and the tip end portion of the wiper arm is rotatably connected to the support shaft by elastic engagement. It has been configured. In addition, the amount of rotation of the wiper blade with respect to the wiper arm,
The tip of the wiper arm comes into contact with the wiper blade to regulate the rotation. According to this vehicle wiper device, the wiper arm and the wiper blade can be easily attached and detached, and the conventional holding clip is unnecessary, so that the number of parts can be reduced and the cost can be reduced.

However, in the above vehicle wiper device, since the connection between the wiper blade and the wiper arm depends on the elastic engagement force to the support shaft provided on the wiper blade, the tip end portion of the wiper arm abuts on the wiper blade. When the blade reaches the rotation-restricted state, the so-called "lever principle" with the contact point between the wiper arm tip and the wiper blade as a fulcrum causes the wiper arm tip from the support shaft against the elastic engagement force carelessly. There is a risk that they will separate, and when they separate, the connection between the wiper blade and wiper arm will also be released (separated).

[0007]

In consideration of the above facts, the present invention allows the wiper blade to be easily attached to and detached from the wiper arm, and in a normal use state, the wiper blade is securely connected to and supported by the wiper arm. It is possible to obtain a vehicle wiper in which the wiper blade is prevented from being unintentionally separated, and moreover, the rotation of the wiper blade with respect to the wiper arm is appropriately regulated to prevent damage to the wiper arm, the wiper blade, the vehicle body, the glass surface, or the like. Is the purpose.

[0008]

A vehicle wiper according to a first aspect of the invention is a vehicle wiper in which a connecting hole at a tip end portion of a wiper arm is rotatably connected to a support shaft formed on a wiper blade. The support shaft has a small diameter portion in which a shaft diameter dimension is set smaller than a shaft diameter at a predetermined angular position of the wiper arm with respect to the wiper blade, and the connection hole is smaller than the shaft diameter of the support shaft and the small diameter portion. A removable area having an opening of a larger size and allowing the opening to correspond to the small diameter portion of the support shaft to allow the support shaft and the connection hole to be installed and removed, and a wiper used from the removable area While rotating the wiper arm around the support shaft to a position and setting a non-detachable region that makes the opening and the small diameter portion non-corresponding and the support shaft and the connecting hole cannot be attached and detached , Previous The wiper position of use and desorption region
And the front of the wiper blade at a predetermined angular position between
An engaging means for elastically engaging the wiper arm is provided, and
Excessive rotation of the wiper blade with respect to the wiper arm
It is characterized by limiting .

According to another aspect of the vehicle wiper, the opening of the connection hole corresponds to the small diameter portion of the support shaft, and the detachable region where the support shaft and the connection hole can be attached and detached, and the wiper arm from the detachable region. By rotating, the opening of the connecting hole does not correspond to the small diameter portion of the support shaft, and a non-detachable region in which the support shaft and the connecting hole cannot be attached / detached is set. That is, the removable and non-removable regions of the wiper arm and the wiper blade are set according to the rotational positional relationship of the wiper arm with respect to the wiper blade, and the removable region is set to an angular position different from the use position of the wiper. As a result, the wiper arm and the wiper blade do not come off when the wiper is used, and when the wiper arm needs to be detached for maintenance or the like, it can be easily detached by rotating the wiper blade with respect to the wiper arm without requiring a large detaching force.

Furthermore, since the connection of the wiper blade to the wiper arm is structurally stable, rather than the conventional connection depending on an unstable engaging force such as an elastic engaging force on the support shaft, the wiper blade is structurally stable. The connection between the blade and the wiper arm will not be accidentally released (separated).

[0011]

Further, in the vehicle wiper according to claim 1 is
The engagement means elastically engages the wiper blade and the wiper arm at a predetermined angular position between the removable area and the wiper use position, and excessive rotation of the wiper blade with respect to the wiper arm is restricted. Therefore, when the wiper arm is locked back at the time of maintenance or the like, not only can the wiper blade not be inadvertently rotated but scratched, for example, on the vehicle body or the glass surface,
It is possible to prevent the connection between the wiper blade and the wiper arm from being inadvertently released (separated) by reaching the detachable region due to inadvertent rotation during lockback.

A vehicle wiper according to a second aspect of the present invention is the vehicle wiper according to the first aspect , wherein the opening portion and the small diameter portion are in a non-corresponding state, and the support shaft and the connecting hole are detached from each other. In the non-detachable and non-detachable region, the supporting shaft is in contact with the inner circumference of the connecting hole by a peripheral surface of a half circumference or more.

In the vehicle wiper according to the second aspect , even if the support shaft has a small diameter portion whose shaft diameter dimension is set to be smaller than the shaft diameter, the support shaft is in contact with the connecting hole for more than half the circumference. Therefore, in the non-detachable region (wiper use position), the connecting hole does not come out from the support shaft, and the wiper blade and the wiper arm are not separated. Moreover, rattling does not occur between them.

A vehicle wiper according to a third aspect of the present invention is a vehicle wiper in which rotation of the wiper blade with respect to the wiper arm is limited to a predetermined angle, and a tip end of the wiper arm is connected to a support shaft formed on the wiper blade. At
A connection hole which is formed at the tip of the wiper arm and which allows the wiper arm to be attached to and detached from the support shaft at a first angle position with respect to the wiper blade; and the wiper arm and / or the wiper blade, When the wiper arm and the wiper blade are relatively rotated about the support shaft by a predetermined angle from the angular position toward the wiper use position, the wiper blade and the wiper arm are elastically engaged at the second angular position. And a rotation means for restricting rotation of the wiper blade with respect to the wiper arm between the use position and the second angular position.

In the vehicle wiper of the third aspect , the wiper blade and the wiper arm are elastically engaged by the engaging means at the second angular position of the wiper arm. That is, the free rotation of the wiper blade and the wiper arm is allowed only from the use position to the second angular position until the engagement means engages. Therefore, when the wiper arm is locked back during maintenance or the like, it is possible not only to prevent the wiper blade from inadvertently rotating to cause scratches on the vehicle body or the glass surface, but also to prevent accidents during lockback. It is possible to prevent the connection between the wiper blade and the wiper arm from being inadvertently released (separated) from reaching the first angular position by such a rotation. Moreover, since the rotation restriction is restricted only by the elastic engagement force, the engagement is released when an excessive force acts on the engagement means, and the wiper arm or the wiper blade is not damaged.

A vehicle wiper according to a fourth aspect of the present invention is the vehicle wiper according to the third aspect , wherein the support shaft has a small diameter portion having a shaft diameter dimension smaller than the shaft diameter at the first angular position. The connecting hole has an opening having a size smaller than the shaft diameter of the support shaft and larger than the diameter of the small diameter part.

In the vehicle wiper according to the fourth aspect, by making the opening of the connecting hole correspond to the small diameter portion of the supporting shaft at the first angular position, the supporting shaft and the connecting hole can be attached and detached (the connecting hole. Can be connected by simply inserting from the opening). Then, by rotating the wiper arm and the wiper blade from the first angular position toward the use position with the support shaft inserted into the connection hole through the opening, the connection hole opening corresponds to the small diameter part of the support shaft. Out of position. Therefore, the support shaft cannot be separated from the connecting hole. As a result, the wiper arm and the wiper blade are not separated during the rotation from the use position to the second angular position (normal use state).

That is, when the wiper is used, the wiper arm and the wiper blade are not disengaged from each other, and when the wiper arm needs to be detached for maintenance or the like, the wiper blade can be easily attached and detached without rotating the wiper arm. it can. Furthermore, since the connection of the wiper blade to the wiper arm is not a structure that is dependent on an unstable engaging force such as an elastic engaging force on the support shaft as in the related art but a structurally stable connection, the wiper blade and the wiper arm are connected. The connection of will not be inadvertently released (separated).

[0020]

1 (A) to 1 (D) are sectional views showing the structure of a main part of a vehicle wiper 10 according to a first embodiment of the present invention. FIG. 2 is a front view showing the overall structure of the vehicle wiper 10.

The vehicle wiper 10 includes a wiper arm 12 and a wiper blade 30. Wiper arm 12
Includes an arm head 14, and the arm head 14 is fixed to a pivot shaft (not shown). A retainer 16 is rotatably supported at the tip of the arm head 14, and an arm piece 18 is provided at the tip of the retainer 16.
Are integrally formed of synthetic resin. As shown in FIGS. 1A to 1D, a connecting hole 20 is formed at the tip of the arm piece 18. This connecting hole 20 is
A part of the peripheral edge is open, and a wiper blade 30 described later
It is a connection support part.

The arm piece 18 has a connecting hole 20.
An elastic engaging portion 22 as an engaging means is formed in the vicinity of. The elastic engaging portion 22 is formed in a rectangular frame shape as a whole, is formed to extend in the direction of the wiper blade 30 described later, and has a predetermined elasticity. A convex portion 24 is formed at a corner of the elastic engaging portion 22 on the rear side of the lower end, and an upper wall protrusion 44 of the wiper blade 30 described later is formed.
Can be engaged with.

On the other hand, the wiper blade 30 has a synthetic resin primary lever 32, a secondary lever 34, and a blade rubber 36.

The primary lever 32 has a substantially U-shaped cross section, and a support shaft 40 is integrally provided between two opposing side walls 38 at the central portion in the longitudinal direction. Further, the upper wall above this support shaft (the central portion in the longitudinal direction of the primary lever 32) is not formed, and in this portion, the distance between the two side walls 38 facing each other is larger than the thickness of the arm piece 18. Has been done. Accordingly, the wiper arm 12 (the connecting hole 20 of the arm piece 18) is inserted by inserting the arm piece 18 between the side walls 38 at the central portion in the longitudinal direction of the primary lever 32 and inserting the support shaft 40 into the connecting hole 20. The wiper blade 30 (the support shaft 40 of the primary lever 32) is rotatably connected and supported.

Here, as shown in FIG. 1 (D) and FIG.
The support shaft 40 of the primary lever 32 described above is disposed at a predetermined angular position of the wiper arm 12 with respect to the wiper blade 30 [first position of the wiper arm 12 with respect to the wiper blade 30.
Angle position (solid line position in FIG. 1D), for example, 60 degrees]
Has a small diameter portion 42 in which the shaft diameter dimension S is set smaller than the shaft diameter D (so-called D cut). Further, the connecting hole 20 of the arm piece 18 is
The opening 26 is smaller than the shaft diameter D and larger than the small diameter portion 42 (shaft diameter dimension S). Therefore,
By making the opening 26 correspond to the small diameter portion 42 of the support shaft 40 (at the first angular position), the support shaft 40 and the connecting hole 20 can be attached and detached. On the other hand, FIG.
As shown in FIGS. 1 (A) to 1 (C), the opening 26 has the support shaft 4
By rotating the wiper arm 12 about the support shaft 40 from the removable area corresponding to the small diameter portion 42 of 0 to the wiper use position so that the opening 26 and the small diameter portion 42 do not correspond to each other.
The support shaft 40 and the connecting hole 20 cannot be detached from each other.

Further, in this case, the opening portion 26 and the small diameter portion 42
In the non-detachable region where the support shaft 40 and the connecting hole 20 cannot be attached / detached due to the non-correspondence between Has been done.

Further, as described above, the opening 26 has a predetermined angular position of the wiper arm 12 with respect to the wiper blade 30 between the detachable region corresponding to the small diameter portion 42 of the support shaft 40 and the wiper use position [the wiper blade of the wiper arm 12]. Second angular position relative to 30 (from FIG. 1 (B) to FIG.
(Position (C)), for example, between 27 degrees 12 minutes and 19 degrees 48 minutes], the elasticity of the wiper arm 12 (arm piece 18) is attached to the upper wall projection 44 of the wiper blade 30 (primary lever 32) described above. The convex portion 24 formed on the engaging portion 22 is elastically engaged. That is, when the wiper arm 12 and the wiper blade 30 are relatively rotated about the spindle 40 by a predetermined angle from the first angle position toward the wiper use position or from the wiper use position toward the first angle position, The wiper blade 30 and the wiper arm 12 are elastically engaged by the upper wall protrusion 44 and the convex portion 24 (elastic engaging portion 22) at the second angular position. As a result, the wiper blade 30 is restricted from rotating with respect to the wiper arm 12 between the use position (the state shown in FIG. 1A) and the second angular position (the state shown in FIG. 1B) (the wiper arm). Wiper blade 3 for 12
It is possible to limit excessive rotation of 0).
Further, in this case, when a load is further applied between the wiper blade 30 and the wiper arm 12 in a state where the rotation is limited, the elastic engagement portion 22 elastically deforms and bends, and the convex portion 24 causes the upper wall protrusion 44 to move. The vehicle exceeds the rotation limit range by getting over the vehicle (state shown in FIG. 1C).

Next, the operation of the first embodiment will be described.

In the vehicle wiper 10 having the above structure, when the wiper is in use, as shown in FIG.
2 (the connecting hole 20 of the arm piece 18) rotatably supports the wiper blade 30 (the support shaft 40 of the primary lever 32).

In this wiper use state, the wiper arm 12 and the wiper blade 30 are moved toward the first angular position from the wiper use position (the state shown in FIG. 1A) to support the spindle 4.
When a relative rotation about 0 is performed for a predetermined angle, the upper wall projection 44 of the wiper blade 30 and the elastic engaging portion 22 (the convex portion 2) of the wiper arm 12 at the second angular position as shown in FIG. 1B.
4) is elastically engaged. This allows the use position (Fig. 1
Excessive rotation of the wiper blade 30 with respect to the wiper arm 12 is restricted between the state shown in (A) and the second angular position (state shown in FIG. 1B). Therefore, when the wiper arm 12 is locked back at the time of maintenance or the like, it is possible to prevent the wiper blade 30 from being inadvertently rotated and scratching the vehicle body or the glass surface.

Further, in this case, when a load is applied between the wiper blade 30 and the wiper arm 12 in a state where the rotation is restricted, as shown in FIG. 1C, the elastic engagement having the convex portion 24 is formed. The portion 22 elastically deforms and bends, and the upper wall protrusion 4
The convex portion 24 rides over 4 and exceeds the rotation limit range. As described above, since the rotation of the wiper blade 30 is restricted only by the elastic engagement force, when the excessive force acts on the elastic engagement portion 22, the engagement between the convex portion 24 and the upper wall projection 44 is performed. Is released, and the wiper arm 12 or the wiper blade 30 is not damaged.

On the other hand, when the wiper blade 30 is detached from the wiper arm 12, the wiper arm 12 is set to the first angular position with respect to the wiper blade 30, as shown in FIG. As a result, the opening 26 of the connecting hole 20 is brought into a state corresponding to the small diameter portion 42 of the support shaft 40. Opening 26
Is set to be smaller than the shaft diameter D of the support shaft 40 and larger than the small diameter portion 42 (shaft diameter dimension S).
0 and the connecting hole 20 can be attached and detached, and the wiper blade 3
The zero can be detached from the wiper arm 12.

As described above, in the vehicle wiper 10 according to the first embodiment, the opening of the connecting hole 20 is formed in the small diameter portion 42 of the support shaft 40 at the first angular position of the wiper blade 30 and the wiper arm 12. By associating 26 with each other, the support shaft 40 and the connecting hole 20 can be attached and detached (it can be connected by simply inserting it from the opening 26 of the connecting hole 20). Then, by rotating the wiper arm 12 and the wiper blade 30 relative to each other from the first angular position toward the use position with the support shaft inserted into the connection hole 20 through the opening 26, the opening 26 of the connection hole 20 is supported by the support shaft. 40 small diameter portion 42
It deviates from the corresponding position with. Therefore, the support shaft 40 cannot be separated from the connecting hole 20. As a result, the wiper arm 12 and the wiper blade 30 are not separated during the rotation from the use position to the second angular position (normal use state).

That is, in the vehicle wiper 10 according to the first embodiment, the opening 26 of the connecting hole 20 has the support shaft 40.
Corresponding to the small-diameter portion 42 of the support shaft 40 and the connection hole 20, and the detachable region where the support shaft 40 and the connection hole 20 can be attached / detached.
A non-detachable region where the spindle 40 and the coupling hole 20 cannot be attached / detached is set so as not to correspond to the small diameter portion 42. In other words, the removable and non-removable regions of the wiper arm 12 and the wiper blade 30 are set according to the rotational positional relationship of the wiper arm 12 with respect to the wiper blade 30, and the removable region is set to an angle position different from the wiper use position. There is.
As a result, the wiper arm 12 and the wiper blade 30 do not come off when the wiper is used, and when the wiper arm 30 needs to be detached for maintenance or the like, the wiper blade 30 is not attached to the wiper arm 12 without a large detaching force.
It can be easily attached and removed simply by rotating.

Further, the connection of the wiper blade 30 to the wiper arm 12 is structurally stable rather than the conventional connection depending on an unstable engaging force such as an elastic engaging force on the support shaft 40. The connection between the wiper blade 30 and the wiper arm 12 will not be inadvertently released (separated).

Further, the opening 26 and the small diameter portion 4 of the support shaft 40.
In the non-detachable region where the support shaft 40 and the connection hole 20 cannot be attached / detached in a non-corresponding state with the support shaft 40, the support shaft 40 contacts the inner circumference of the connection hole 20 by the peripheral surface of a half circumference or more. There is. Therefore, even if the support shaft 40 is formed with the small diameter portion 42 in which the shaft diameter dimension S is set to be smaller than the shaft diameter D, the connecting hole 20 can be pulled out from the support shaft 40 in the non-detachable region (wiper use position). Therefore, the wiper blade 30 and the wiper arm 12 are not separated from each other. Moreover, rattling does not occur between them.

Furthermore, in this vehicle wiper 10,
At the second angular position between the detachable area of the wiper blade 30 and the wiper arm 12 and the wiper use position, the upper wall protrusion 44 of the wiper blade 30 and the elastic engagement portion 22 (convex portion 24) of the wiper arm 12 are elastic. Engage to limit excessive rotation of the wiper blade 30 relative to the wiper arm 12. That is, the free rotation of the wiper blade 30 and the wiper arm 12 is possible only from the use position to the second angular position until the upper wall protrusion 44 and the elastic engaging portion 22 (the convex portion 24) are engaged. Allowed Therefore, when the wiper arm 12 is locked back during maintenance or the like, it is possible not only to prevent the wiper blade 30 from unintentionally rotating and scratching the vehicle body or the glass surface, but also to prevent the wiper arm 12 from locking. It is possible to prevent the connection between the wiper blade 30 and the wiper arm 12 from being inadvertently released (separated) due to reaching the detachable region (first angular position) due to inadvertent rotation. Moreover, since this rotation restriction is restricted only by the elastic engagement force, when the excessive force acts on the elastic engagement portion 22, the engagement between the convex portion 24 and the upper wall protrusion 44 is released, and the wiper arm is released. 12 or the wiper blade 30 is not damaged.

In the first embodiment described above,
The elastic engaging portion 22 as the engaging means is provided to the wiper arm 12
Although the configuration is described as being formed on the (arm piece 18), the configuration is not limited to this, and the wiper blade 30 (primary lever 32) may be provided.

Limiting the excessive rotation of the wiper blade 30 with respect to the wiper arm 12 in the wiper use position (the upper wall protrusion 44 of the wiper blade 30 and the elastic engagement portion 22 of the wiper arm 12 are elastically engaged). Focusing only on this, it is not necessary to provide the support shaft 40 with a so-called D-cut small-diameter portion 42 or the connection hole 20 with the opening 26, and the wiper blade 30 for the wiper arm 12 is not required.
Upper wall protrusion 44 and elastic engagement portion 22 that limit excessive rotation of the
It is also possible to provide only one.

Even in this case, when the wiper arm 12 is locked back at the time of maintenance or the like, the wiper blade 30 is prevented from being inadvertently rotated so that, for example, the vehicle body or the glass surface is not scratched. When the elastic engagement portion 22 is subjected to an excessive force, the engagement between the protrusion 24 and the upper wall protrusion 44 is released, and the wiper arm 12 or the wiper blade 30 is not damaged.

Next, another embodiment of the present invention will be described. The same components as those of the configuration described in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

4 (A) to 4 (D) are sectional views showing the structure of the main part of the vehicle wiper 50 according to the second embodiment of the present invention.

Wiper blade 52 of vehicle wiper 50
Is a winter blade. Each lever assembly of the wiper blade 52 facing the wiper arm 12 is covered with a rubber seal member 54, which prevents snow or the like from entering between the levers of the wiper blade 52. ing.

Primary lever 5 of wiper blade 52
At the upper center in the longitudinal direction of 6, the metal clip holder 5
8 are provided. The support shaft 40 described above is integrally provided on the clip holder 58. Further, on the upper wall of the clip holder 58, a hooking portion 60 corresponding to the above-mentioned upper wall projection 44 of the wiper blade 30 (primary lever 32) is formed by bending, and the hooking portion 60 is attached to the hooking portion 60. Piece 18)
The convex portion 24 formed on the elastic engaging portion 22 is elastically engaged.

The other structure is the same as that of the first embodiment described above.

Next, the operation of the second embodiment will be described.

In the vehicle wiper 50 having the above structure, when the wiper is in use, as shown in FIG.
2 (the connection hole 20 of the arm piece 18) rotatably supports the wiper blade 52 (the support shaft 40 of the clip holder 58).

In this wiper use state, the wiper arm 12 and the wiper blade 52 are moved toward the first angular position from the wiper use position (the state shown in FIG. 4A) to the support shaft 4
When a relative rotation about 0 is performed for a predetermined angle, as shown in FIG. 4B, at the second angular position, the hook portion 60 of the wiper blade 52 and the elastic engagement portion 22 (the convex portion 2) of the wiper arm 12 are rotated.
4) is elastically engaged. This allows the use position (Fig. 4
Excessive rotation of the wiper blade 52 with respect to the wiper arm 12 is restricted between the state shown in (A) and the second angular position (state shown in FIG. 4B). Therefore, when the wiper arm 12 is locked back at the time of maintenance or the like, it is possible to prevent the wiper blade 52 from being carelessly rotated and being scratched, for example, on the vehicle body or the glass surface.

Further, in this case, when a load is applied between the wiper blade 52 and the wiper arm 12 in a state where the rotation is restricted, as shown in FIG. 4C, the elastic engagement having the convex portion 24 is formed. The portion 22 elastically deforms and bends, and the hook portion 6
The convex portion 24 gets over 0 and exceeds the rotation limit range. As described above, since the rotation of the wiper blade 52 is restricted only by the elastic engagement force, when the excessive force acts on the elastic engagement portion 22, the engagement between the convex portion 24 and the hook portion 60 is performed. Is released, and the wiper arm 12 or the wiper blade 52 is not damaged.

On the other hand, when the wiper blade 52 is attached to or detached from the wiper arm 12, the wiper arm 12 is set to the first angular position with respect to the wiper blade 52, as shown in FIG. 4 (D). As a result, the opening 26 of the connecting hole 20 is brought into a state corresponding to the small diameter portion 42 of the support shaft 40. Therefore, the support shaft 40 and the connection hole 20 can be attached and detached, and the wiper blade 52 can be attached and detached from the wiper arm 12.

As described above, in the vehicle wiper 50 according to the second embodiment, the opening of the connecting hole 20 is formed in the small diameter portion 42 of the support shaft 40 at the first angular position between the wiper blade 52 and the wiper arm 12. By associating 26 with each other, the support shaft 40 and the connecting hole 20 can be attached and detached (it can be connected by simply inserting it from the opening 26 of the connecting hole 20). Then, by rotating the wiper arm 12 and the wiper blade 52 from the first angular position toward the use position while the support shaft is inserted from the opening 26 into the connection hole 20, the opening 26 of the connection hole 20 is supported by the support shaft. 40 small diameter portion 42
It deviates from the corresponding position with. Therefore, the support shaft 40 cannot be separated from the connecting hole 20. As a result, the wiper arm 12 and the wiper blade 52 are not separated from each other in the rotation from the use position to the second angular position (normal use state). In addition, when it is necessary to attach / detach for maintenance or the like, it is possible to easily attach / detach by simply rotating the wiper blade 52 with respect to the wiper arm 12 without requiring a large attaching / detaching force.

Further, the connection of the wiper blade 52 to the wiper arm 12 is structurally stable rather than the conventional connection depending on an unstable engaging force such as an elastic engaging force on the support shaft 40. The connection between the wiper blade 52 and the wiper arm 12 will not be accidentally released (separated).

Further, the opening 26 and the small diameter portion 4 of the support shaft 40.
In the non-detachable region where the support shaft 40 and the connection hole 20 cannot be attached / detached in a non-corresponding state with the support shaft 40, the support shaft 40 contacts the inner circumference of the connection hole 20 by the peripheral surface of a half circumference or more. There is. Therefore, even if the support shaft 40 is formed with the small diameter portion 42 in which the shaft diameter dimension S is set to be smaller than the shaft diameter D, the connecting hole 20 can be pulled out from the support shaft 40 in the non-detachable region (wiper use position). Therefore, the wiper blade 52 and the wiper arm 12 are not separated from each other. Moreover, rattling does not occur between them.

Furthermore, in this vehicle wiper 50,
At the second angular position between the detachable area of the wiper blade 52 and the wiper arm 12 and the wiper use position, the hook portion 6 of the wiper blade 52 (clip holder 58) is provided.
0 and the elastic engagement portion 22 (convex portion 24) of the wiper arm 12 elastically engage with each other, and excessive rotation of the wiper blade 52 with respect to the wiper arm 12 is restricted. That is, the free rotation of the wiper blade 52 and the wiper arm 12 is possible only from the use position to the second angular position until the hook portion 60 and the elastic engagement portion 22 (the convex portion 24) are engaged. Allowed For this reason, the wiper arm 12 is required for maintenance.
Not only can you prevent the wiper blade 52 from rotating carelessly when you lock it back, but you can also remove it by inadvertent rotation during lockback. It is possible to prevent the connection between the wiper blade 52 and the wiper arm 12 from being inadvertently released (separated) from reaching the region (first angular position). Moreover, since this rotation restriction is restricted only by the elastic engagement force, when the excessive force acts on the elastic engagement portion 22, the engagement between the convex portion 24 and the hook portion 60 is released, and the wiper arm is released. 12 or the wiper blade 52 is not damaged.

In the second embodiment,
The elastic engaging portion 22 as the engaging means is provided to the wiper arm 12
Although the configuration has been described as being formed on the (arm piece 18), the configuration is not limited to this, and it may be configured to be provided on the clip holder 58 of the wiper blade 52.

In addition, in the second embodiment,
The hook portion 60 is bent and formed on the upper wall of the clip holder 58, and the elastic engagement portion 22 (projection portion 24) of the wiper arm 12 (arm piece 18) is elastically engaged with the hook portion 60. The configuration is not limited to this, and the elastic engagement portion 22 can be configured to be engaged by another member (region). For example, like the wiper blade 72 of the vehicle wiper 70 shown in FIGS. 5 (A) and 5 (B), the engagement pin 76 is provided between the side walls of the clip holder 74 in the same manner as the support shaft 40. The elastic engaging portion 22 (convex portion 24) on 76
May be elastically engaged to limit the rotation of the wiper blade 72.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a main part of a vehicle wiper according to a first embodiment of the present invention.

FIG. 2 is a front view showing the overall configuration of the vehicle wiper according to the first embodiment of the present invention.

FIG. 3 is a sectional view of a spindle provided on a wiper blade of the vehicle wiper according to the first embodiment of the present invention.

FIG. 4 is a sectional view showing a configuration of a main part of a vehicle wiper according to a second embodiment of the present invention.

FIG. 5 is a sectional view showing a modified example of the vehicle wiper according to the second embodiment of the invention.

[Explanation of symbols]

10 Vehicle wiper 12 wiper arm 18 arm pieces 20 connection holes 22 Elastic engagement part (engagement means) 24 convex 26 opening 30 wiper blade 40 spindles 42 Small diameter part 44 Upper wall protrusion

Continuation of the front page (56) References JP-A-58-36748 (JP, A) JP-A-10-315921 (JP, A) Jitsuko Sho-36-4612 (JP, Y1) International publication 00/061409 (WO, A1) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60S 1/34-1/40

Claims (4)

(57) [Claims] 1. A wiper for a vehicle, wherein a connecting hole at a tip portion of a wiper arm is rotatably connected to a support shaft formed on a wiper blade, wherein the support shaft is at a predetermined angular position of the wiper arm with respect to the wiper blade. The shaft diameter dimension has a small diameter portion set to be smaller than the shaft diameter, the connection hole has an opening portion having a dimension smaller than the shaft diameter of the support shaft and larger than the small diameter portion, A detachable region that allows the support shaft and the connection hole to be attached and detached corresponding to the small diameter portion of the shaft, and the wiper arm is rotated about the support shaft from the removable region to the wiper use position. A non-removable region is set to make the opening and the small-diameter part non-corresponding and the support shaft and the connecting hole cannot be attached and detached, and a predetermined angle between the detachable region and the wiper use position.
The wiper blade and the wiper arm in a degree position
Is provided with engaging means for elastically engaging
A wiper for a vehicle , wherein excessive rotation of the wiper blade with respect to the wiper blade is restricted . 2. A state in which the opening portion and the small diameter portion do not correspond to each other.
Therefore, the attachment and detachment of the support shaft and the connection hole was impossible.
In the non-detachable area, the support shaft has a peripheral surface of a half circumference or more.
The vehicle wiper according to claim 1, wherein the wiper is in contact with the inner circumference of the connecting hole . 3. A wiper blade for a wiper arm
Formed on the wiper blade with rotation limited to a predetermined angle
For vehicles in which the tip of the wiper arm is connected to the supported shaft
In the wiper, it is formed at the tip of the wiper arm and
The wiper arm at the first angular position with respect to the cord.
A connection hole that can be attached to and detached from the shaft, and is installed in the wiper arm and / or the wiper blade.
From the first angle position to the wiper use position
The wiper arm and the wiper blade to the support shaft
The second angular position when rotated relative to the specified angle
Elastically engages the wiper blade and the wiper arm with
Engaging means to perform, the wiper blade with respect to the wiper arm
Prevents rotation between the use position and the second angular position.
A vehicle wiper characterized by being limited . 4. The support shaft is at the first angular position.
Has a small diameter portion with a shaft diameter dimension smaller than the shaft diameter, and the connecting hole is smaller than the shaft diameter of the support shaft and smaller than the shaft diameter.
The vehicle wiper according to claim 3 , wherein the wiper has an opening having a size larger than a diameter of the diameter portion .