JPH0920213A - Wiper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper capable of making certain switching operation by preventing operational malfunction of a position switch used for detecting a position of a wiper blade. SOLUTION: A position switch 9 generates a hatch operation inhibiting signal for inhibiting operating of a hatch because a contactor 9a is not pushed by a position switch pushing elastic member 11. Then, on the contrary, a hatch operation permitting signal for enabling the hatch operation is generated because the contactor 9a is pushed by the position switch pushing elastic member 11 when a wiper blade is in its storage position, the position switch 9 becomes an object subjected to elastic collision of a load on the link 5 side against the contactor 9a so that life of the position switch 9 used for detecting a position of a wiper blade can be extended, thus enabling certain switching operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper device used for wiping a wiping surface by energizing it, and more particularly to a wiper device for a hatch that can be opened and closed.

[0002]

2. Description of the Related Art A wiper device for a rear window glass, which wipes a wiping surface by energizing, is known as shown in FIG. In the illustrated wiper device,
A pivot shaft 52, to which a wiper arm 51 equipped with a wiper blade 50 is fixed, is rotatably attached to a vehicle body. A pivot arm (not shown) fixed to the pivot shaft 52 and one end side of the pivot arm are rotatable. It is known that a link connecting rod (not shown) connected thereto, a motor arm (not shown) rotatably connected to the other end of the link connecting rod, and a wiper motor (not shown) having the motor arm fixed to a motor shaft are known. Has been.

When the wiper motor is rotated forward by energization,
The pivot arm reciprocally rotates between the first reversal position A and the second reversal position B of the wiper blade 50 by the four-bar rotation chain constituted by the motor arm, the link connecting rod, and the pivot arm to reciprocally rotate. Fifty
The rear hatch 53 (rear window glass), which is the wiping surface, is wiped by the wiper motor and the wiper motor reversely rotates in reverse, so that the pivot arm reaches the storage position C further below the first inversion position A of the wiper blade 50. The wiper blade 50 is rotated to stop at the storage position C.
In such a wiper device, since the hatch 53 that can be opened in a flip-up manner is wiped at the rear gate 54, the position detection of the pivot shaft 52 is performed to detect whether the wiper blade 50 is at the storage position C or not. There is provided a position switch (not shown) capable of colliding with the pivot arm. When the wiper blade 50 is in the retracted position C, the pivot arm collides with the contact and presses the contact, so that the switch is turned on to connect a power source to a hatch opener switch (not shown). , The pivot arm separates from the contactor when the wiper blade 50 is not in the storage position C, the power supply to the hatch opener is switched off and the hatch 53 is opened when the wiper blade 50 is not in the storage position C. I was trying not to.

[0004]

In the wiper device as described above, the pivot arm is attached to the contact of the position switch for detecting whether or not the wiper blade 50 is in the retracted position C and switching it on or off. Since the structure is such that it directly collides, and the pivot arm that collides with the position switch contact is a rigid body made of iron, the load when the pivot arm rotates is directly applied to the contact of the position switch, which damages the position switch. It's hard to say not
There is a problem that the position switch may fail to switch due to breakage, and it has been a problem to solve this problem.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wiper device which can prevent the position switch for detecting the position of the wiper blade from malfunctioning and can perform a reliable switching operation. Has an aim.

[0006]

Configuration of the Invention

[0007]

In a wiper device according to a first aspect of the present invention, a wiper motor, a link connected to the wiper motor, and a wiper arm having a wiper blade are attached, and the link is rotated by the rotating force of the wiper motor. Via, while swinging the wiper blade reciprocally between both inversion positions of the hatch, has a pivot shaft that rotates the wiper blade from one inversion position to the storage position, and a contactor that can contact the link, A position switch that generates a hatch operation prohibition signal that prohibits the operation of the hatch when the wiper blade is not in the storage position, and a hatch operation permission signal that enables the operation of the hatch when the wiper blade is in the storage position. , A position switch that is placed between the position switch and the link and can elastically collide with the contact. Is characterized in that a configuration in which a pressing elastic member.

In the wiper device according to the second aspect of the present invention, a wiper motor having a motor shaft that rotates forward when current is applied in the forward direction and reversely rotates when current is applied in the reverse direction, and a motor arm connected to the motor shaft of the wiper motor. , A link connecting rod rotatably connected to the motor arm, a rotatably connected link connecting rod, a pivot arm connected to the pivot shaft, and a wiper arm equipped with a wiper blade are attached, and the motor shaft is When the forward rotation is performed, the wiper blade is reciprocally rocked between the two reversing positions, and when the motor shaft is reversely rotated, the pivot shaft that moves the wiper blade to the retracted position and the pivot holder that rotatably supports the pivot shaft are provided. Attach the pivot holder to the vehicle body The wiper blade, which has a position switch pressing elastic member capable of elastically colliding with the contact of the position switch and attached to the pivot bracket and the position switch pressing elastic member. When the wiper blade is not in the retracted position, the contact element separates from the elastic member for pressing the position switch and generates a hatch operation prohibition signal that inhibits the operation of the hatch, while the contact element presses the position switch when the wiper blade is in the retracted position. The present invention is characterized in that it is provided with a position switch that is pressed by an elastic member and that generates a hatch operation permission signal that enables the operation of the hatch.

In the wiper device according to the third aspect of the present invention, the elastic member for pressing the position switch has a lever main body which is elastically deformable in the form of a plate, and one side of the lever main body is fixed to the pivot arm by rotation. It is characterized in that a pivot arm fixing portion fixed by means of the above and a contact colliding portion capable of colliding with the contact of the position switch on the other side of the lever body are provided.

[0010]

In the wiper device according to the present invention,
When the wiper blade is not in the retracted position, the position switch generates a hatch operation prohibition signal for prohibiting the operation of the hatch because the contact is not pressed by the elastic member for pressing the position switch, and on the contrary, the wiper blade does not operate. When the blade is in the retracted position, the contact is elastically pressed by the elastic member for pressing the position switch, so that the hatch operation permission signal that enables the operation of the hatch is generated. Therefore, the position switch does not apply the load on the link side directly to the contact.

[0011]

1 to 3 show an embodiment of a wiper device according to the present invention.

The illustrated wiper device 1 mainly includes a wiper motor 2, a motor arm 3, a link connecting rod 4, a pivot arm 5, a pivot shaft 6, a pivot holder 7, a link bracket 8, a position switch 9, a switch bracket 10 and a position switch pressing member. The lever 11 is an elastic member.

The wiper motor 2 is arranged on the front surface 8b2 side of the link bracket 8 in the wiper motor mounting portion 8a formed near one end of the link bracket 8, and the motor shaft 2a is protruded from the rear surface 8b1 of the link bracket 8 and screwed. 12 is attached to the wiper motor 2 by screwing, and the external connection wiring 2b is electrically connected to a power source through a wiper switch (not shown).

When the wiper switch is turned on, the wiper motor 2 is connected to the power source in the forward direction with respect to the armature built in the motor case (not shown). Therefore, the motor shaft 2a of this armature rotates forward, and On the other hand, when the wiper switch is switched off, the motor shaft 2a continues to rotate forward to a predetermined stop position by a wiper fixed position stop switch (not shown) and then reversely rotates a predetermined angle. The back surface 8 of the link bracket 8 is attached to the motor shaft 2a of the wiper motor 2.
The motor arm 3 is connected at b1.

The motor arm 3 has a flat plate shape and has a motor shaft coupling portion 3a coupled to the motor shaft 2a formed on the base end side and rotatably coupled to the link connecting rod 4 on the tip end side. The first ball pin 3b is attached. The motor arm 3 rotates integrally with the motor shaft 2a.

The motor arm 3 has an eccentric metal 3c for moving the first ball pin 3b.
The eccentric metal 3c is provided when the motor shaft 2a of the wiper motor 2 described above is reversely rotated.
The distance from the motor shaft connecting portion 3a to the first ball pin 3b is changed to be larger than a predetermined value, and when the motor shaft 2a of the wiper motor 2 starts to rotate in the normal direction, the motor shaft connecting portion 3a to the first ball pin 3b. It has a function of returning the distance to 3b to a predetermined value.

The link connecting rod 4 connected to the first ball pin 3b of the motor arm 3 has a link bracket 8
Has a rod shape with a length from one end to the other end, and a first ball retainer 4a connected to the first ball pin 3b of the motor arm 3 described above via a spherical pair is attached to the one end side. In addition, a second ball retainer 4b similar to that on the one end side is attached to the other end side, and the second ball retainer 4b is rotatably coupled to the pivot arm 5.

As shown in FIG. 2, the pivot arm 5 is provided with a pivot shaft connecting portion 5b on one end side of a flat plate-shaped arm body 5a, and the arm body 5a.
The second ball pin 5c is attached to the other end side of, and a position near the second ball pin 5c is a lever attachment portion 5d.

Since the pivot arm 5 is provided with the pivot shaft coupling portion 5b and the lever mounting portion 5d on the flat plate-shaped arm body 5a, when the arm body 5a is formed, a material is formed by pressing a simple flat plate. To improve the yield. The lever 11 is attached to the lever attachment portion 5d.

On the lever 11, as shown in FIG.
A lever main body 11a that is plate-shaped and is elastically deformable in a direction orthogonal to its length direction, and the lever main body 1
The pivot arm fixing portion 11b screwed to the lever mounting portion 5d of the pivot arm 5 by the screw 13 on one side which is the pivot arm 5 side of 1a, and the position described later on the other side which is the position switch 9 side of the lever main body 11a. A contactor colliding portion 11c capable of colliding with the contactor 9a included in the switch 9 is integrally provided. On the side edge of the pivot arm fixing portion 11b, the detenting tongue piece 11 that is bent and protrudes from the pivot arm fixing portion 11b.
Since the d is formed, the lever 11 does not rotate with respect to the lever mounting portion 5d of the pivot arm 5.

The lever 11 has a length dimension corresponding to the lever body 11a from the lever mounting portion 5d of the pivot arm 5 to the contact 9a of the position switch 9, and the pivot arm fixing portion 11b has a length relative to the lever body 11a. Since the pivot arm 5 is a rigid body made of iron, the lever body 11a of the lever 11 is elastic in a direction orthogonal to the longitudinal direction even when the pivot arm 5 is a rigid body. Due to the deformation, the load of the pivot arm 5 is not directly applied to the contactor 9a of the position switch 9.

As described above, the pivot arm 5 is connected to the pivot shaft connecting portion 5b at the base end side of the pivot shaft 6, and the second ball pin 5c is spherically paired with the second ball retainer 4b of the link connecting rod 4 described above. The distance from the motor shaft coupling portion 3a to the second ball pin 5c in the motor arm 3 and the distance from the first ball retainer 4a to the second ball retainer 4b in the link connecting rod 4 are coupled to each other. When,
In the pivot arm 5, the pivot shaft connecting portion 5b
To the second ball pin 5c, the rotation of the motor arm 3 is converted into the rotation of the pivot shaft 6 corresponding to the swing range of the wiper by the lever ratio constituted by the four-bar rotation chain.

The pivot shaft 6 coupled to the pivot shaft coupling portion 5b of the pivot arm 5 is rotatably supported by the pivot holder 7.

As shown in FIG. 2, the pivot holder 7 has a pivot shaft insertion hole 7b formed in the center of a holder body 7a having a cross section of a substantially + shape, and is formed near the other end of the link bracket 8. Pivot attachment 8c
The holder body 7a is fixed to the link bracket 8 by screwing the screw 14 at.

Further, the holder body 7a of the pivot holder 7
At a position facing the back surface 8b1 side of the link bracket 8, there is formed a switch bracket holding portion 7c cut into a space having a width dimension slightly larger than the thickness of the switch bracket 10 described later. The switch bracket holding portion 7c is a first link bracket mounting plate portion 10 provided in a switch bracket 10 described later.
Switch bracket 1 by sandwiching the end of b
Holds 0.

The pivot shaft 6 projects from the surface 8b2 of the link bracket 8 near its tip, and since this link bracket 8 is mounted between the outer panel and the inner panel of the rear gate, the tip is arranged to project from the outer panel. To be done.

A wiper arm 51 having a wiper blade similar to that shown in FIG. 4 is connected to the tip end of the pivot shaft 6.

On the other hand, a position switch 9 is mounted on a switch bracket 10 near the pivot mounting portion 8c of the link bracket 8.

The position switch 9 is composed of an elastic contactor 9a.
Is arranged so as to project from the rectangular case 9b, and when the contactor 9a is separated from the case 9b, the contactor 9a is turned off and the external connection terminals 9c and 9d are cut off.
When a is pressed toward the case 9b, the external connection terminals 9c and 9d are brought into an ON state and are electrically connected.

The position switch 9 includes an external connection terminal 9c,
Since 9d is connected to the power source through a hatch opener switch (not shown) arranged in the driver's seat, the contact 9
In the off state in which a is away from the case 9b, the hatch operation prohibition signal for cutting off the energization path of the above-mentioned hatch opener switch is generated, and on the contrary, the contact 9a
In the ON state in which is pressed to the case 9b side, the hatch operation permission signal for forming the energization path of the above-mentioned hatch opener switch is generated.

As shown in FIG. 2, the switch bracket 10 is formed on a flat surface and is bent in a crank shape from the bracket body 10a on both sides of the bracket body 10a to which the position switch 9 described above is fixed. Second link bracket mounting plate portions 10b and 10c are formed.

First link bracket mounting plate portion 10b
Are arranged on the side of the bracket holder 10a on the pivot holder 7, and the first link bracket mounting plate 10
A support protrusion 10d protruding toward the link bracket 8 side is formed by press working at approximately the center of b, and the position of the link bracket 8 facing the support protrusion 10d is slightly larger than the outer shape of the support protrusion 10d. An open circular hole 8d is formed.

Further, the first link bracket mounting plate portion 1
The end portion of 0b is sandwiched between the switch bracket holding portion 7c of the pivot holder 7 and the link bracket 8 described above.
With the end portion of the link bracket mounting plate portion 10b of the above is prevented from falling off by the switch bracket holding portion 7c,
Support protrusion 1 inserted in the round hole 8d of the link bracket 8
It is rotatable around 0d.

The second link bracket mounting plate portion 10c is symmetrically arranged with respect to the first link bracket mounting plate portion 10b with the bracket body 10a interposed therebetween, and the switch bracket 10 is rotated substantially in the center thereof in the direction of rotation. A long hole 10e that has been cut into a long shape is formed. A positioning screw 15 is inserted into the elongated hole 10e, and the positioning screw 15 is formed in the elongated hole 10e in the link bracket 8.
Is screwed into a screw hole (not shown) that is arranged opposite to.

Since the elongated hole 10e of the second link bracket mounting plate portion 10c is formed to be long in the rotating direction of the switch bracket 10, the switch bracket 10 is temporarily fixed by the positioning screw 14 and the switch bracket 10 is temporarily fixed. The bracket 10 is rotated with respect to the link bracket 8 to set the air gap from the contactor 9a of the position switch 9 to the contactor collision portion 11c of the lever 11 to a predetermined value, and then, the positioning screw 14 is used to permanently stop the gap. By doing so, the position switch 9 is attached at a predetermined position with respect to the pivot arm 5.

In the wiper device 1 having such a structure, the link bracket 8 is attached between the outer panel and the inner panel of the rear gate, and the external connection terminals 9c and 9d of the position switch 9 are electrically connected to the hatch opener switch. The external connection wiring 2b of the wiper motor 2 is electrically connected to the power source through the wiper switch and attached to the vehicle body, and the tip end side of the pivot shaft 6 is arranged so as to project from the outer panel and corresponds to the storage position C of the wiper blade. A wiper arm 51 equipped with a wiper blade is coupled to the pivot shaft 6.

When the wiper blade is in the retracted position C, the position switch 9 is turned on because the contactor 9a is elastically pressed by the contactor collision portion 11c of the lever 11 attached to the pivot arm 5. Then, a hatch actuation allowance signal is generated, which causes the hatch opener switch to open the hatch 53 shown in FIG.

When the power switch (ignition switch) is switched on after the wiper blade is in the retracted position C, the wiper switch is switched on.
Since a positive current is supplied to the wiper motor 2 from the power supply, the motor arm 3 rotates forward together with the motor shaft 2a, and the pivot arm 5 and the pivot shaft 6 start rotating via the link connecting rod 4 to store the wiper blade. The wiper blade is moved from the position C to the first reversal position A, and then the pivot arm 5 and the pivot shaft 6 are reciprocally rotated, whereby the wiper blade is moved between the first reversal position A and the second reversal position B. Swing back and forth between them to wipe the hatch 53.

The wiper blade moves to the first inverted position A and the second
Since the wiper blade is not in the retracted position C while the wiper is wiped back and forth between the reversal position B and the reversal position B, the position switch 9 has the contactor 9a attached to the pivot arm 5 of the lever 1
Since it is off from the contactor collision portion 11c of No. 1 and is in the off state, the hatch operation prohibition signal is generated, and thus the hatch 53 cannot be opened by the hatch opener switch.

When the wiper blade is wiped on the hatch 53 between the first reverse position A and the second reverse position B, the wiper switch is turned off,
By the wiper fixed position stop switch, a positive current is supplied from the power source to the wiper motor 2 until the wiper blade reaches the first reversing position A, and the wiper motor 2 is supplied to the wiper motor 2 after reaching the first reversing position A. Current is supplied in the opposite direction from the power supply, the wiper blade moves from the first reversal position A to the storage position C and stops.
When the wiper blade reaches the storage position C, the position switch 9 is in the ON state because the contactor 9a is elastically pressed by the contactor collision portion 11c of the lever 11 attached to the pivot arm 5. The hatch operation permission signal is generated, and the hatch 53 is opened by the hatch opener switch.

The power switch is switched off while the wiper blade is wiping between the first reversal position A and the second reversal position B of the hatch 53 by the wiper switch being switched on. Then, the supply of the power supply current to the wiper motor 2 is also cut off, so that the motor shaft 2a stops and the wiper blade stops between the first reversal position A and the second reversal position B.

In this state, the position switch 9 has the contactor 9a.
Is off from the contactor collision portion 11c of the lever 11 attached to the pivot arm 5 and is in the OFF state, and the hatch operation prohibition signal is generated. Therefore, the hatch 53 cannot be opened by the hatch opener switch. While the wiper blade is between the first inverted position A and the second inverted position B, the hatch 53 is opened so that the wiper blade and the wiper arm 51 do not damage the hatch 53.

When the wiper blade moves from the first reversal position A to the storage position C and stops, the wiper blade comes to the storage position C so that the position switch 9
Since the contactor 9a of the position switch 9 is elastically pressed by the contactor collision portion 11c of the lever 11 attached to the pivot arm 5, the contactor 9a of the position switch 9 is turned on without directly receiving the load from the side of the pivot arm 5. It will be switched.

Further, since the lever 11 which is not a rigid body collides with the contact 9a of the position switch 9, a slight error is absorbed in the position setting of the position switch 9, so a gap gauge or the like is used. This eliminates the need for positioning, facilitates positioning, and reduces man-hours required for replacing the position switch 9.

[0045]

As described above, according to the wiper device of the present invention, the contact of the position switch is not pressed by the elastic member for pressing the position switch when the wiper blade is not in the retracted position. Therefore, a hatch operation prohibition signal that prohibits the operation of the hatch is generated.On the contrary, when the wiper blade is in the retracted position, the contact is pressed by the elastic member for pressing the position switch, so that the operation of the hatch is stopped. As the position switch generates the enabling signal for enabling the hatch operation, the load on the link side is elastically collided with the contact piece, and the life of the position switch for detecting the position of the wiper blade is thereby increased. It has an excellent effect that it is possible to extend the length of time and a reliable switching operation can be performed.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a wiper device according to the present invention.

FIG. 2 is a plan view around a position switch in the wiper device shown in FIG.

3 is an external view around a position switch in the wiper device shown in FIG.

FIG. 4 is a front view of a conventional wiper device.

[Explanation of symbols]

 1 wiper device 2 wiper motor 2a motor shaft 3 motor arm (link) 4 link connecting rod (link) 5 pivot arm (link) 6 pivot shaft 7 pivot holder 8 link bracket 9 position switch 9a contact 11 (elastic member for pressing position switch) Lever 11a Lever body 11b Pivot arm fixed part 11c Contact collision part 50 Wiper blade 51 Wiper arm 53 Hatch

Claims (3)

[Claims] 1. A wiper motor, a link connected to the wiper motor, and a wiper arm having a wiper blade attached thereto,
A pivot shaft that reciprocally swings the wiper blade between the two inversion positions of the hatch via a link by the rotational force of the wiper motor and that rotates the wiper blade from one inversion position to the retracted position, It has a contact that can abut the link and generates a hatch operation prohibition signal that prohibits the operation of the hatch when the wiper blade is not in the retracted position, while it also activates the hatch when the wiper blade is in the retracted position. A position switch that generates a hatch operation permission signal that enables the position switch, and is arranged between the position switch and the link,
A wiper device comprising a position switch pressing elastic member capable of elastically colliding with a contact. 2. A wiper motor having a motor shaft that rotates forward when energized in the forward direction and that rotates reversely when energized in the reverse direction, a motor arm coupled to the motor shaft of the wiper motor, and rotatable to the motor arm. The linked link connecting rod and the link connecting rod are rotatably connected, and the pivot arm connected to the pivot shaft and the wiper arm equipped with the wiper blade are attached.
When the motor shaft rotates forward, the wiper blade reciprocally swings between both reversing positions, and when the motor shaft rotates backward, the pivot shaft that moves the wiper blade to the retracted position and the pivot shaft rotate. A pivot holder that supports the position switch, a link bracket that attaches the pivot holder to the vehicle body side, an elastic member that is attached to the pivot arm and that can elastically collide with the contact of the position switch, and the position switch. When the wiper blade is not in the retracted position, the contact is separated from the position switch pressing elastic member to generate a hatch operation prohibition signal for prohibiting the operation of the hatch. On the other hand, when the wiper blade is in the retracted position, the contact is moved by the elastic member for pressing the position switch A wiper device comprising a position switch that generates a hatch operation permission signal that is pressed to enable operation of the hatch. 3. The position switch pressing elastic member includes a lever body that is plate-shaped and elastically deformable, and a pivot arm fixing portion that is fixed to one side of the lever body by being fixed to a pivot arm by rotation. The wiper device according to claim 2, further comprising: a contactor colliding portion capable of colliding with a contactor of the position switch on the other side of the lever body.