JP4009400B2 - Wiper pivot and wiper device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wiper pivot and a wiper device that wipes a wiper with the power of a wiper motor.
[0002]
[Prior art]
The wiper pivot that wipes and wipes the wiper by the power of the wiper motor is screwed to the vehicle interior panel, and the pivot shaft is inserted into the shaft hole formed in the pivot holder. It is known that a wiper arm is fixed to a protruding tip portion by a nut, and a pivot arm constituting a wiper link is coupled to a base end portion of a pivot shaft under a vehicle interior panel. One end of the link connecting rod is rotatably connected to the pivot arm, and the other end of the link connecting rod is rotatably connected to the tip of the motor arm having one end coupled to the output shaft of the wiper motor. Therefore, when the wiper motor is operated, the motor arm is rotated, and the rotational motion is converted into the reciprocating rotation of the pivot arm by the link connecting rod, and the pivot shaft is reciprocated to be mounted on the wiper arm on the vehicle body exterior panel. Wipe the wiping surface with a wiper blade.
[0003]
[Problems to be solved by the invention]
In the above-described conventional wiper pivot, a sea-shaped pin (C pin) having an outer diameter larger than the inner diameter of the shaft hole of the pivot holder is fitted to the tip portion protruding from the pivot holder on the wiper arm fixed side of the pivot shaft. In addition, a washer having an outer diameter larger than the inner diameter of the shaft hole of the pivot holder is extrapolated on the pivot holder side of the sea-shaped pin, and is removed from the pivot holder on the pivot arm fixing side of the pivot shaft. Since the pivot holder is coupled to the protruding base end portion, the pivot shaft is prevented from being detached from the pivot holder, and thus the pivot shaft has a structure incapable of moving in the direction of the shaft hole of the pivot holder. In such a structure, the absorption of energy against an external impact applied in the axial direction of the pivot shaft is low.
[0004]
OBJECT OF THE INVENTION
An object of the wiper pivot and wiper device according to the present invention is to provide a wiper pivot and a wiper device that can absorb the impact energy when a large impact is applied from the outside.
[0005]
[Structure of the invention]
[0006]
[Means for Solving the Problems]
In the wiper pivot according to the first aspect of the present invention, the wiper arm is attached to the distal end portion of the shaft main body that protrudes from the vehicle body panel, and the pivot arm is attached to the proximal end portion of the shaft main body. A pivot shaft that is linked to the wiper motor side and reciprocally rotates by power from the wiper motor; a pivot holder that is disposed below the vehicle body panel and has a shaft hole that rotatably supports the pivot shaft; and the pivot shaft A locking portion formed integrally with the pivot shaft at the base end portion of the shaft body of the shaft, and an end portion near the pivot arm of the shaft hole of the pivot holder by rotatably supporting the locking portion. When a large impact is applied to the pivot shaft, it is elastically deformed by the impact force applied from the locking part. A guide for dropping the stopper portion from the pivot holder is mounted to the guide, with a guide regulating member for regulating the guide elastic deformation, the locking portion, the first inclination angle to the distal end side of the shaft body of the pivot shaft A first inclined surface for inserting a pivot shaft having a second inclined angle for preventing a pivot shaft larger than the first inclined surface on the pivot arm coupling portion side of the pivot shaft. The guide is formed with a first support surface capable of supporting the first inclined surface and a second support surface capable of supporting the second inclined surface on the inner side. And at least two tongue pieces that can be elastically deformed so that the inner diameters formed by the first and second support surfaces are increased by the impact force applied from the locking portion. It is said.
[0007]
In the wiper pivot according to the second aspect of the present invention, in addition to the structure of the first aspect , the tongue piece is disposed inside the annular groove formed at the end of the pivot holder, and in the annular groove, The guide restricting member mounted on the outside of the tongue piece is accommodated.
[0008]
In the wiper pivot according to a third aspect of the present invention, in addition to the structure of the second aspect , the guide restricting member may be a pivot arm when the pivot shaft is assembled to the pivot holder and the locking portion is locked to the guide. It is characterized in that it is configured to be disposed so as to be able to abut on the surface.
[0009]
In the wiper device according to a fourth aspect of the present invention, in addition to the wiper pivot structure of the first, second, or third aspect, a wiper motor having an output shaft that rotates by energization, and a base end portion coupled to the output shaft of the wiper motor A motor arm, a link connecting rod having one end rotatably connected to the tip of the motor arm and the other end rotatably connected to the tip of the pivot arm, and the tip connected to the link connecting rod A pivot arm that is pivotally coupled to the end and has a proximal end coupled to the proximal end of the pivot shaft of the wiper pivot, a wiper arm coupled to the distal end of the pivot shaft, and a wiper arm. It is characterized by having a wiper blade.
[0010]
[Effects of the Invention]
In the wiper pivot according to the first, second and third aspects of the present invention and the wiper device according to the fourth aspect of the present invention, if a large impact is applied to the pivot shaft from the outside, the locking portion is disengaged from the guide. As a result, the pivot shaft is detached from the pivot holder and displaced downward of the vehicle body panel. Therefore, energy is absorbed for a large impact.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
[0012]
【Example】
1 to 9 show an embodiment of a wiper pivot and a wiper device according to the present invention.
[0013]
The illustrated wiper pivot 1 mainly includes a pivot holder 2, a pivot shaft 3, and a guide restricting member 4, and this wiper pivot 1 is a first wiper device 30 having the same configuration as the wiper pivot 1. A wiper pivot 1 and a second wiper pivot 10 are used. The wiper device 30 includes a wiper motor 31, a motor arm 32, a first link connecting rod 33, a first pivot arm 34, a first wiper pivot 1, a first wiper arm 35, a first wiper blade 36, and a second link. The connecting rod 37, the second pivot arm 38, the second wiper pivot 10, the second wiper arm 39, and the second wiper blade 40 are configured.
[0014]
The pivot holder 2 is formed of a resin having a slight elasticity, and a shaft support portion 2b is formed on a holder body 2a having a substantially triangular plate shape.
[0015]
The shaft support portion 2b is formed in a cylindrical shape penetrating vertically in FIG. 3 at the substantially central portion of the holder body 2a, and a shaft hole 2b1 having an inner diameter d1 is formed inside the shaft support portion 2b. ing.
[0016]
On the holder main body 2a, three mounting bolts 5, 5, 5 are projected and attached. The holder main body 2a is a dash upper disposed below the exterior panel (vehicle body panel) 51 of the vehicle body. From the lower surface side of the interior panel 50 such as a panel, the shaft support portion 2b of the pivot holder 2 is inserted into a round hole 50a formed in the interior panel 50, and screw holes 50b and 50b are also formed in the interior panel 50. 50b, the mounting bolts 5, 5, 5 are respectively inserted into contact with the lower surface of the interior panel 50, and the mounting bolts 5, 5, 5 arranged on the upper surface of the interior panel 50 are fitted with nuts 6, 6 and 6 are fixed to the lower surface of the interior panel 50 by being screwed respectively.
[0017]
An annular groove 2c and a guide 2d are formed at the end of the shaft support portion 2b on the first pivot arm 34 side, respectively.
[0018]
The annular groove 2c is an annular shape having a depth dimension L1 from the base end face 2b2 of the shaft support portion 2b with an outer diameter dimension d3 smaller than the outer diameter dimension d2 of the holder body 2a and larger than the inner diameter dimension d1 of the shaft hole 2b1. It has been cut into a groove.
[0019]
The guide 2d is arranged on the inner peripheral side of the annular groove 2c, and is composed of four tongue pieces 2d1, 2d1, 2d1, and 2d1 that form the inner wall of the annular groove 2c, as shown in FIG. Each of the tongue pieces 2d1, 2d1, 2d1, and 2d1 is formed separately through four notches 2d2, 2d2, 2d2, and 2d2. First inner support surfaces 2d3, 2d3, 2d3, and 2d3 are formed on the inner peripheral portions of the tongue pieces 2d1, 2d1, 2d1, and 2d1, respectively. The second support surfaces 2d4, 2d4, 2d4, and 2d4 are formed on the base end surface 2b2 side of the shaft support portion 2b in succession to the first support surfaces 2d3, 2d3, 2d3, and 2d3, respectively.
[0020]
The first support surfaces 2d3, 2d3, 2d3, and 2d3 are inclined at an angle θb with respect to the hole direction (depth direction) of the shaft hole 2b1, respectively, whereas the second support surfaces 2d4, 2d4, 2d4 and 2d4 are respectively set to an inclination angle θa larger than the inclination angle θb with respect to the hole direction (depth direction) of the shaft hole 2b1.
[0021]
Each of the tongue pieces 2d1, 2d1, 2d1, and 2d1 is smaller and smaller on the side of increasing the inner diameter of the first support surfaces 2d3, 2d3, 2d3, and 2d3 and the second support surfaces 2d4, 2d4, 2d4, and 2d4. It is elastically deformed to the side. The first support surfaces 2d3, 2d3, 2d3, and 2d3 are respectively slidably contacted with the first inclined surface 3c1 formed in the engaging portion 3c of the pivot shaft 3, and the second support surfaces 2d4, 2d4, 2d4, and 2d4 are brought into contact with each other. Are slidably contacted with the second inclined surface 3c2 formed in the locking portion 3c of the pivot shaft 3, respectively. In this case, four tongue pieces 2d1 are provided, but it is sufficient that at least two tongue pieces 2d1 are formed as the inner wall of the annular groove 2c.
[0022]
In the annular groove 2c, a restricting member mounting portion 2c1 is formed on the base end surface 2b2 side of the shaft support portion 2b. The restricting member mounting portion 2c1 has an annular shape having an inner diameter dimension d4 that is slightly larger than the inner diameter dimension d3 of the annular portion 2c, and the guide restricting member 4 is fitted to the restricting member attaching portion 2c1. .
[0023]
The guide restricting member 4 is made of rubber and has a ring shape. When the guide restricting member 4 is fitted to the restricting member attaching portion 2c1, the tongue pieces 2d1, 2d1, 2d1, and 2d1 of the guide 2d are elastically formed so that the inner diameter is reduced. The locking portion 3c has a function of being prevented from being easily removed from the guide 2d by being deformed. When the guide restricting member 4 is given a large impact force exceeding a predetermined value to the pivot shaft 3, the impact portion causes the locking portion 3 c to move toward the base end surface 2 b 2 side of the shaft support portion 2 b of the pivot holder 2. Only when trying to move, the tongue pieces 2d1, 2d1, 2d1, 2d1 of the guide 2d are allowed to be expanded so as to increase the inner diameter.
[0024]
A pivot shaft 3 is inserted into the shaft hole 2 b 1 of the pivot holder 2. The pivot shaft 3 is provided with a round bar-shaped shaft body 3a. The shaft body 3a has an outer diameter d5 that is slightly smaller than the inner diameter d1 of the shaft hole 2b1 of the pivot holder 2.
[0025]
A wiper arm coupling portion 3b is formed at the tip of the shaft body 3a, and a male screw portion 3b1 and a serration forming portion 3b2 are formed in the wiper arm coupling portion 3b.
[0026]
The wiper arm coupling portion 3b is disposed so as to protrude from the pivot hole 51a formed in the exterior panel 51 such as a cowl panel or a hood panel to the outside of the vehicle body when the pivot holder 2 is fixed to the interior panel 50. In the wiper arm coupling portion 3b, the male screw portion 3b1 is inserted into the pivot shaft mounting hole 35a formed in the first wiper arm 35, and the serration forming portion 3b2 is formed in the serration receiving portion 35b formed in the first wiper arm 35. After the contact, the nut 41 is screwed into the male screw portion 3b1, thereby being coupled to the base end portion of the first wiper arm 35. A first wiper blade 36 is attached to the tip of the first wiper arm 35.
[0027]
The pivot shaft 3 is formed with a locking portion 3c near the base end portion of the shaft body 3a. The locking portion 3c is formed in a spherical shape with an outer diameter dimension d6 larger than the outer diameter dimension d5 of the shaft body 3a. A first inclined surface 3c1 is formed on the shaft body 3a side, and the shaft body A second inclined surface 3c2 is formed on the side opposite to 3a.
[0028]
The first inclined surface 3c1 is set at a first inclination angle θ2 with respect to the axial direction of the shaft body 3a, and the second inclined surface 3c2 is also a first inclined surface with respect to the axial direction of the shaft body 3a. The second inclination angle θ1 is larger than the angle θ2 . In the locking portion 3c, the first inclined angle θ2 of the first inclined surface 3c1 coincides with the inclined angle θb of the first support surface 2d3 formed on the guide 2d, and the second inclined surface 3c2 The inclination angle θ1 coincides with the inclination angle θa of the second support surface 2d4 formed on the guide 2d. The first inclined surface 3c1 is slidably supported by the first support surface 2d3 of the guide 2d, and the second inclined surface 3c2 is slidably supported by the second support surface 2d4 of the guide 2d.
[0029]
The second inclined surface 3c2 has an inclination angle larger than that of the first inclined surface 3c1. The first inclined surface 3c1 collides with the guide 2d when the pivot shaft 3 is assembled to the pivot holder 2. On the other hand, the second inclined surface 3c2 is provided with the pivot shaft 3 assembled to the pivot holder 2 with a small stress. It is because it is provided so that it may not come out of 2.
[0030]
The pivot shaft 3 is formed with a pivot arm coupling portion 3d at the proximal end portion of the shaft body 3a, and this pivot arm coupling portion 3d is formed at the proximal end portion of the first pivot arm 34. The portion 34a is fixed by caulking.
[0031]
Pivot shafts DOO 3, from the guide 2d side of the regulating member mounting portion 2c1 to guide regulatory pivot holder 2 member 4 is attached fit annular groove 2c, the pivot holder 2 by the wiper arm coupling part 3b above a shaft hole 2b1 As shown in FIG. 4, the first inclined surface 3c1 of the locking portion 3c pushes the tongue pieces 2d1, 2d1, 2d1, 2d1 of the guide 2d, and the guide restricting member 4 is also elastic. As shown in FIG. 1, the first inclined surface 3c1 of the locking portion 3c is brought into contact with the first support surface 2d3 of each tongue piece 2d1, and the second inclined surface of the locking portion 3c. The surface 3c2 comes into contact with the second support surface 2d4 of each tongue piece 2d1, so that it is assembled to the pivot holder 2, and at the same time, the guide restricting member 4 is elastically restored. At this time, since the first inclined surface 3c1 of the locking portion 3c collides with each tongue piece 2d1 of the guide 2d at a small first inclination angle θ1, the pivot shaft 3 is fitted with a single touch with a small stress. The holder 2 is secured and assembled. Therefore, the pivot shaft 3 and the pivot holder 2 can be easily assembled as compared with the conventional one in which a sea-shaped pin or washer is attached to the pivot shaft.
[0032]
The pivot shaft 3 is pulled out to the first wiper arm 35 side by the contact of the first pivot arm 34 with which the guide restricting member 4 is in contact with the base end surface 2b2 of the shaft support 2b of the pivot holder 2. The second inclined surface 3c2 of the locking portion 3c is brought into contact with the second support surface 2d4 formed on each tongue piece 2d1 of the guide 2d, thereby being prevented from being pulled out to the first pivot arm 34 side. The pivot holder 2 is rotatably supported. The locking portion 3c is slidably supported by the first inclined surface 3c1 being rotatable on the first support surface 2d3 of the guide 2d and the second inclined surface 3c2 being rotatable on the second support surface 2d4 of the guide 2d. Has been.
[0033]
Similar to the first wiper pivot 1, the second wiper pivot 10 includes a pivot holder 2, a pivot shaft 3, and a guide restricting member 4, and the pivot shaft 3 provided in the second wiper pivot 10. The base end portion of the second pivot arm 38 is fixed by caulking to the base end portion thereof, the second wiper arm 39 is fixed to the tip end portion of the pivot shaft 3 with a nut, and the second wiper arm 39 is fixed to the tip end portion of the second wiper arm 39. Two wiper blades 40 are mounted.
[0034]
The wiper motor 31 rotates the output shaft 31a when energized.
[0035]
The base end of the motor arm 32 is fixed to the output shaft 31a of the wiper motor 31 by screwing a nut 41, and a first ball pin 42 is attached to the tip of the motor arm 32.
[0036]
The first link connecting rod 33 is provided with a first ball retainer 33a at one end and a second ball retainer 33b at the other end. The first ball retainer 33a is coupled to the first ball pin 42 of the motor arm 32 through a spherical pair. The second ball retainer 33b is coupled to a second ball pin 43 attached to the second pivot arm 38 via a spherical pair. A third ball pin 44 is attached to the second pivot arm 38 on the opposite side of the second ball pin 43.
[0037]
A third ball retainer 37a provided at one end of the second link connecting rod 37 is coupled to the third ball pin 44 attached to the second pivot arm 38 via a spherical pair.
[0038]
The second link connecting rod 37 is provided with a third ball retainer 37a at one end thereof and a fourth ball retainer 37b at the other end thereof. The fourth ball retainer 37b is coupled to a fourth ball pin 45 attached to the first pivot arm 34 via a spherical pair.
[0039]
In the wiper device 30, the wiper motor 31 is screwed to the interior panel 50, each of the first and second wiper pivots 1, 10 is screwed to the lower surface of the interior panel 50, and the wiper motor 31 is provided in the wiper control circuit. The first and second wiper arms 35 and 39 are fixed to the pivot shafts 3 and 3 of the first and second wiper pivots 1 and 10 that are electrically connected to the wiring and project from the exterior panel 51, respectively. The first and second wiper blades 36 and 40 are mounted on the second wiper arms 35 and 39 and mounted on the vehicle body.
[0040]
When a wiper switch provided in a wiper control circuit ( not shown) is turned on, the output shaft 31a of the wiper motor 31 is rotated forward, so that the motor arm 32 is rotated by the first link connecting rod 33 to the second pivot arm 38. The first pivot arm 34 is reciprocally rotated by the second link connecting rod 37, and the pivot shafts 3 and 3 of the first and second wiper pivots 1 and 10 are reciprocally rotated. As a result, the first and second wiper arms 35 and 39 are reciprocally swung on the wiping surface 60 shown in FIG. 9, and the first and second wiper arms 35 and 39 incorporate first arm springs ( not shown) to The wiping surface 60 is wiped while the first and second wiper blades 36 and 40 are pressed against the wiping surface 60. When the wiper switch is switched off, the wiper fixed position stop circuit built in the wiper control circuit is operated, so that the wiper motor 31 is not turned on until the first and second wiper blades 36 and 40 return to the predetermined stop positions. When power is supplied and the first and second wiper blades 36 and 40 reach a predetermined stop position, the power supply to the wiper motor 31 is cut off, and the first and second wiper blades 36 and 40 stop at the stop position. To do.
[0041]
When the wiper motor 31 is actuated and the wiping surface 60 is wiped by the first and second wiper blades 36, 40, the pivot shafts 3, 3 have tongues 2d1, 2d1, 2d1, 2d1 of the guide restricting member 4 of the guide 2d. The second inclined surface 3c2 of the locking portion 3c is retained by a second support surface 2d4 formed on each tongue piece 2d1 of the guide 2d. Therefore, the locking portion 3c does not come off from the guide 2d.
[0042]
If a large impact force exceeding a predetermined value is applied to the pivot shafts 3 and 3 from the outside by any chance, the impact force at that time is applied to the locking portion 3c, as shown in FIG. As shown, the first inclined surface 3c1 of the locking portion 3c expands the tongue pieces 2d1, 2d1, 2d1, and 2d1 of the guide 2d, and the guide restricting member 4 is also elastically crushed, whereby the locking portion 3c pushes and expands the respective tongue 2d1 of the guide 2d, and as shown in FIGS. 5 and 6, the locking portion 3c is disengaged from the guide 2d, and the pivot shafts 3 and 3 are respectively connected to the pivot holders 2 and 2. Since it deviates from the predetermined position and is displaced below the exterior panel 51, the impact energy applied from the outside is absorbed.
[0043]
【The invention's effect】
As described above, according to the wiper pivot according to the first, second, and third aspects of the present invention and the wiper device according to the fourth aspect of the present invention, if a large impact is applied to the pivot shaft from the outside. When the engaging portion formed integrally with the pivot shaft is disengaged from the guide formed on the pivot holder, the pivot shaft is detached from the pivot holder and displaced below the vehicle body panel. Therefore, there is an excellent effect that energy is absorbed with respect to a large impact.
[Brief description of the drawings]
FIG. 1 is a longitudinal front view of an embodiment of a wiper pivot according to the present invention.
FIG. 2 is a bottom view of a pivot holder used for the wiper pivot shown in FIG.
3 is a cross-sectional view of the wiper holder shown in FIG. 2 taken along line AA.
FIG. 4 is a longitudinal front view for explaining the movement of the pivot shaft when receiving an impact in the wiper pivot shown in FIG. 1;
FIG. 5 is a longitudinal front view for explaining the movement of the pivot shaft when receiving an impact in the wiper pivot shown in FIG. 1;
6 is a longitudinal front view for explaining the movement of the pivot shaft when receiving an impact in the wiper pivot shown in FIG. 1; FIG.
7 is a front view of a wiper device using the wiper pivot shown in FIG. 1;
8 is a plan view of the wiper device shown in FIG. 4. FIG.
9 is an external perspective view of the wiper device shown in FIG. 4 when mounted on a vehicle body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Wiper pivot, 1st wiper pivot 2 Pivot holder 2b1 Shaft hole 2c Ring groove 2d Guide 2d1 Tongue piece 2d3 (Support surface) 1st support surface 2d4 (Support surface) 2nd support surface 3 Pivot shaft 3a Shaft body 3b Wiper arm coupling portion 3c Locking portion 3c1 First inclined surface 3c2 Second inclined surface 3d Pivot arm coupling portion 4 Guide restricting member 10 (wiper pivot) Second wiper pivot 30 Wiper device 31 Wiper motor 31a Output shaft 32 Motor arm 33 (link connecting rod) first link connecting rod 34 (pivot arm) first pivot arm 35 (wiper arm) first wiper arm 36 (wiper blade) first wiper blade 37 (link connecting rod) second link connecting rod 38 ( Pivot arm) Second pivot Over arm 39 (the wiper arm) second wiper arm 40 (wiper blade) second wiper blades 51 (vehicle body panel) external panel

Claims (4)

A wiper arm is attached to the distal end portion of the shaft main body that protrudes from the vehicle body panel, and a pivot arm is attached to the proximal end portion of the shaft main body , and this pivot arm is linked to the wiper motor side for power from the wiper motor. A pivot shaft that reciprocally pivots,
A pivot holder disposed under the vehicle body panel and formed with a shaft hole for rotatably supporting the pivot shaft;
A locking portion formed integrally with the pivot shaft at the base end portion of the shaft body of the pivot shaft ;
The locking portion is pivotally supported and formed at the end of the pivot holder shaft hole near the pivot arm . When a large impact is applied to the pivot shaft, the locking portion is given by the locking portion. A guide that elastically deforms due to the impact force and drops the locking portion from the pivot holder;
A guide restricting member mounted on the guide and restricting elastic deformation of the guide ;
The locking portion is formed with a first inclined surface for inserting a pivot shaft having a first inclination angle on the distal end side of the shaft body of the pivot shaft, and on the pivot arm coupling portion side of the pivot shaft. A second inclined surface having a second inclination angle for preventing the pivot shaft from being larger than the first inclined surface is formed, and the guide includes a first inclined surface capable of supporting the first inclined surface. And a second support surface capable of supporting the second inclined surface are formed on the inside, respectively, and the first and second support surfaces are caused by an impact force applied from the locking portion. A wiper pivot characterized by comprising at least two tongue pieces that can be elastically deformed so as to increase the inner diameter dimension to be formed . The tongue piece is disposed inside an annular groove formed at the end of the pivot holder, and a guide restricting member mounted on the outside of the tongue piece is accommodated in the annular groove. The wiper pivot according to claim 1 . Guide regulating member, wherein when the pivot shaft engaging portion mounted to the pivot holder is locked to the guide, to Claim 2, characterized in that it is arranged to allow contact with the pivot arm Wiper pivot. Wiper pivot,
A wiper motor having an output shaft that rotates when energized;
A motor arm having a base end coupled to the output shaft of the wiper motor;
One end of the motor arm is rotatably coupled to the tip,
A link connecting rod whose other end is rotatably coupled to the tip of the pivot arm;
A pivot arm having a distal end portion rotatably coupled to the other end portion of the link connecting rod and a proximal end portion coupled to a proximal end portion of the pivot shaft of the wiper pivot;
A wiper arm coupled to the tip of the pivot shaft;
2. A wiper blade mounted on the wiper arm.
The wiper device according to any one of items 2 and 3.

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