JP2012058801A - Pedal device of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pedal device of a vehicle capable of suppressing retreat of a pedal arm by surely operating a pedal retreat suppression mechanism when receiving impact load from the front side of the vehicle without causing increases in the number of parts and weight.SOLUTION: A pedal device 1 of a vehicle includes: a pedal arm 2 having an upper end part rotatably pivoted to right and left side walls 9A and 9B of a pedal bracket 9 by a pedal shaft 3; and pedal retreat suppression mechanism for rotating the pedal arm 2 to a vehicle front side by interlocking with a moving operation of a dash panel 8 to a vehicle rear side by receiving impact load from the vehicle front side. The pedal retreat suppression mechanism comprises: a link mechanism 19; and a trigger 18 rotatably mounted on the one side wall 9A of the pedal bracket 9. On the side wall 9A on the side on which the trigger 18 of the pedal bracket 9 is mounted, a reinforcing part (bead) 30 is integrally formed around a support part of the pedal arm 2 and a mounting part of the trigger 18.

Description

  The present invention relates to a pedal device for a vehicle provided with a pedal retraction suppressing mechanism that rotates a pedal arm forward of the vehicle in conjunction with an operation in which a dash panel moves backward in response to an impact load from the front of the vehicle. .

  Vehicle brake pedal devices and clutch pedal devices are each provided with a pedal arm pivotally supported by a pedal bracket attached to the dash panel so that the upper end of the pedal pedal can be pivoted. By depressing, the amount of displacement is transmitted to the brake master cylinder or the clutch master cylinder, thereby performing the required braking or shifting operation.

  By the way, since the master cylinder is directly attached to the dash panel, when the dash panel moves to the rear of the vehicle due to a large impact load from the front of the vehicle, the master cylinder attached to the dash panel also moves to the rear of the vehicle. There is a problem that the push rod rotates the pedal arm to the rear of the vehicle.

  Therefore, a pedal retraction suppression mechanism has been proposed that rotates the pedal arm forward of the vehicle in conjunction with the movement of the dash panel moving backward in response to an impact load from the front of the vehicle (see, for example, Patent Document 1). . Here, an example of the pedal retraction suppression mechanism will be described below with reference to FIGS. 6 and 7.

  6 and 7 are views showing a pedal retraction suppression mechanism provided on the brake pedal. FIG. 6 shows a normal state, and FIG. 7 shows a state when an impact load is applied from the front of the vehicle. 6 and 7, (a) is a side view and (b) is a perspective view.

  An upper end of a pedal arm 102 of the illustrated brake pedal device 101 is pivotally supported by a pedal bracket 109 by a pedal shaft 103 so as to be rotatable in the vehicle front-rear direction. Here, the pedal bracket 109 is attached to a dash panel (not shown), and a vehicle body frame 140 such as a steering support member is positioned behind the pedal bracket 109.

  Thus, the pedal retraction suppression mechanism includes a link mechanism 119 that connects the pedal shaft 103 and the pedal arm 102 and a trigger 118 that is rotatably supported by the pedal bracket 109. Here, the link mechanism 119 includes a first link 123 and a second link 124 that are connected to each other by a pin 122, and a hook-like shape that is cut out in a semicircular shape at the upper end of the first link 123. An engaging portion 123a is formed, and this engaging portion 123a is engaged with the outer periphery of the pedal shaft 103 at the normal time shown in FIG. Further, the lower end of the second link 124 is connected to an intermediate portion of the pedal arm 102 so as to be rotatable by a shaft 125.

  Incidentally, a brake master cylinder 110 is attached to a dash panel (not shown), and an end portion of a push rod 110a extending from the brake master cylinder 110 toward the rear of the vehicle is connected to an intermediate portion of the second link 124. Yes. A return spring 129 is wound around the outer periphery of the pedal shaft 103. One end of the return spring 129 is locked to the pedal bracket 109, the other end is locked to the first link 123, and the link mechanism 119 is locked. The backlash is absorbed by the urging of the first link 123 by the return spring 129.

  One end of the trigger 118 is rotatably attached by a shaft 120. The trigger 118 is formed with a contact piece 118a extending forward of the vehicle. The contact piece 118a is normally in a state where a predetermined interval is provided behind the first link 123 as shown in FIG. positioned.

  In the brake pedal device 101 having the pedal retraction suppression mechanism configured as described above, when the driver depresses the pedal 105 attached to the lower end of the pedal arm 102 at the normal time shown in FIG. 103, and the rotation of the pedal arm 102 is transmitted to the push rod 110a via the link mechanism 119. The push rod 110a is pushed in and the brake master cylinder 110 is driven to obtain the required rotation. Braking is done.

  By the way, when the vehicle receives a large impact load from the front, the dash panel moves to the rear of the vehicle together with the pedal bracket 109 and the brake master cylinder 110 attached thereto. The trigger 118 attached to 109 also moves rearward of the vehicle, and the back surface thereof comes into contact with the front end portion of the vehicle body frame 140. Then, the trigger 118 rotates about the shaft 120 toward the front side of the vehicle (the arrow direction in FIG. 5A), and the contact piece 118a at the tip presses the intermediate portion of the first link 123 toward the front of the vehicle. Therefore, the engaging portion 123a of the first link 123 is released from the pedal shaft 103 and becomes free.

  As described above, when the engaging portion 123a of the first link 123 is disengaged from the pedal shaft 103 and becomes free, the pin 122 is moved to the rear side of the vehicle by the contact of the trigger 118 and the urging force of the return spring 129. While rotating in the moving direction (arrow direction in FIG. 7A), the push rod 110a pushes the second link 124, so that the second link 124 has a lower end shaft 125 on the front side of the vehicle. And the pedal arm 102 is rotated forward of the vehicle about the pedal shaft 103. For this reason, the pedal arm 102 retracts from the position indicated by the chain line to the position indicated by the solid line in FIG.

  However, in the brake pedal device 101 shown in FIGS. 6 and 7, when the vehicle receives a large impact load from the front, the pedal bracket 109 is attached to the pedal arm before the trigger 118 rotates against the vehicle body frame 140. The pedal bracket 109 may be deformed when it is bent inwardly between the support portion 102 and the mounting portion of the trigger 118, or when the trigger 118 abuts against the body frame 140 and receives a force in the rotation direction. Thus, there is a possibility that the moving direction of the contact piece 118a does not become the intended direction, and the trigger 118 may fail to contact the first link 123 and pass through the side of the first link 123. For this reason, there is a possibility that the engaging portion 123a of the first link 123 does not come off the pedal shaft 103 and the rotation of the pedal arm 102 to the rear of the vehicle cannot be suppressed.

  Therefore, conventionally, as shown in FIG. 8, a reinforcing plate 141 is attached to the pedal bracket 109 where the pedal bracket 109 is easily deformed (around the support portion of the pedal arm 102 and the attachment portion of the trigger 118), or the pedal bracket 109 is reinforced. Reinforcing was performed by increasing the plate thickness.

Japanese Patent No. 4006676

  However, when a configuration in which the reinforcing plate 141 as another member is attached to the easily deformable portion of the pedal bracket 109 as shown in FIG. 8, there arises a problem that the number of parts and the weight increase.

  The present invention has been made in view of the above problems, and the purpose of the present invention is to reliably provide a pedal retraction suppression mechanism when receiving impact loads from both fronts without increasing the number of parts and weight. An object of the present invention is to provide a pedal device for a vehicle that can be operated to suppress the backward movement of a pedal arm.

  In order to achieve the above-mentioned object, the invention according to claim 1 is directed to a pedal arm whose upper end is pivotally supported by a pedal shaft on the left and right side walls of a pedal bracket attached to the dash panel, A pedal retraction suppression mechanism that rotates the pedal arm forward of the vehicle in conjunction with the movement of the dash panel to the rear of the vehicle in response to an impact load, and the pedal retraction suppression mechanism can be engaged with and disengaged from the pedal shaft. In a pedal device for a vehicle comprising a link mechanism having a link that engages with a trigger, and a trigger rotatably attached to one side wall of the pedal bracket, the trigger of the pedal bracket is attached The reinforcing portion is integrally formed around the support portion of the pedal arm and the mounting portion of the trigger.

  According to a second aspect of the present invention, in the first aspect of the invention, the reinforcing portion is configured by a bead extending substantially parallel to a straight line connecting the support portion of the pedal arm and the mounting portion of the trigger. .

  According to the present invention, since the reinforcing portion such as a bead is integrally formed on the easily deformable portion of the pedal bracket (the periphery of the supporting portion of the pedal arm on the side wall and the mounting portion of the trigger) and the portion is reinforced, the vehicle moves forward. The pedal bracket is prevented from being deformed when a large impact is applied to the trigger, and the moving direction of the trigger contact piece can be surely set to the intended direction (the direction toward the first link). Moves to the front of the vehicle and acts reliably on the link of the link mechanism. For this reason, the link of the link mechanism is detached from the rotation shaft, and the pedal retraction suppression mechanism operates reliably, and the retraction of the pedal arm is suppressed by the pedal retraction suppression mechanism. Since such an effect is obtained by integrally forming a reinforcing portion such as a bead on the pedal bracket, the number of parts and the weight are not increased, and a reinforcing plate, which is a separate member, is conventionally used for the pedal bracket. Productivity is increased because there is no need to weld.

1 is an exploded perspective view of a brake pedal device according to the present invention. 1 is a side view showing a normal state of a brake pedal device according to the present invention. 1 is a front view showing a normal state of a brake pedal device according to the present invention. It is a perspective view of the pedal bracket part of the brake pedal device concerning the present invention. It is a side view showing a state when an impact load is applied from the vehicle front of the brake pedal device according to the present invention. (A) is a side view which shows the normal state of the conventional brake pedal apparatus, (b) is the perspective view. (A) is a side view showing a state when an impact load is applied from the front of a vehicle of a conventional brake pedal device, and (b) is a perspective view thereof. It is a perspective view of the pedal bracket part of the conventional brake pedal apparatus.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is an exploded perspective view of a brake pedal device according to the present invention, FIG. 2 is a side view showing a normal state of the brake pedal device, FIG. 3 is a front view of the brake pedal device, and FIG. 4 is the brake pedal device. FIG. 5 is a side view showing a state when an impact load is applied from the front of the vehicle of the brake pedal device.

  The illustrated brake pedal device 1 includes a pedal arm 2. The pedal arm 2 is a flat sheet metal press-molded product having a plate surface in the left-right direction of the vehicle, and has a cylindrical shape at its upper end. The pedal shaft 3 is fixed in a lateral direction (perpendicular to the plate surface of the pedal arm 2), and a cylindrical boss 4 is inserted and fixed in the lateral direction (perpendicular to the plate surface of the pedal arm 2). A pedal 5 for the driver to step on with his / her foot is attached to the lower end. Further, on the upper left and lower sides of the pedal arm 2 below the pedal shaft 3, a sheet metal operation element 7 for pressing and operating a stop lamp switch for lighting a stop lamp (not shown), and a first link 23 described later. A sheet metal stopper 67 for assisting the rotation is attached. As shown in FIG. 1, the pedal 5 is configured by adhering a rubber pedal pad 5 b on a substantially rectangular metal plate 5 a bonded to the lower end of the pedal arm 2.

  As shown in FIG. 2, a pedal bracket 9 and a brake master cylinder 10 are attached to a dash panel 8 that partitions the engine room S1 and the vehicle compartment S2 of the vehicle. Here, the pedal bracket 9 is a sheet metal part, and has a pair of left and right side walls 9A and 9B which are arranged in the vehicle width direction and whose plate surface is directed in the left and right direction of the vehicle. The flanges 9a and 9b on the vehicle front side of 9A and 9B are fastened with bolts (not shown) to be attached to the surface of the dash panel 8 on the vehicle compartment S2 side.

  As shown in FIG. 1, bolt insertion holes 11 are respectively formed at opposite positions of the left and right side walls 9A, 9B of the pedal bracket 9, and obliquely above and behind the bolt insertion holes 11 of the left side wall 9A. A shaft hole 12 is formed. A bracket 13 is attached to the right side wall 9B, and a stop lamp switch (not shown) is fitted and fixed in a circular engagement hole 13a formed in the bracket 13.

  Here, the upper end portion of the pedal arm 2 is supported by the pedal bracket 9 so as to be rotatable in the vehicle front-rear direction by the following mounting structure.

  That is, as shown in FIG. 1, a cylindrical collar 14 is inserted into the inside of the pedal shaft 3 that is laterally inserted and fixed to the upper end portion of the pedal arm 2, and the outer periphery of both end portions in the axial direction of the collar 14 is inserted. Are fitted with bushings 15 for reducing sliding resistance and positioning. While maintaining this state, the upper end of the pedal arm 2 is fitted between the left and right side walls 9A and 9B of the pedal bracket 9, and the bolt insertion hole 11 formed on the right side wall 9B of the pedal bracket 9 is inserted into the right side of the bolt insertion hole 11. A bolt 16 inserted from the inside of the collar 14 is passed through the inside of the collar 14, and the bolt 16 protrudes leftward from the bolt insertion hole 11 formed in the left side wall 9 </ b> A of the pedal bracket 9. By tightening the nut 17 to be screwed, the upper end portion of the pedal arm 2 is attached to the pedal bracket 9 so as to be rotatable in the vehicle front-rear direction around a bolt 16 arranged along the left-right direction of the vehicle.

  Thus, in the brake pedal device 1 according to the present embodiment, when the vehicle receives a large impact from the front, the pedal arm 2 is rotated forward to suppress the rearward movement thereof. A pedal retraction suppression mechanism is provided, and this pedal retraction suppression mechanism includes a trigger 18 attached to the pedal bracket 9 and a link mechanism 19 that connects the pedal arm 2, the pedal shaft 3, and the brake master cylinder 10. It consists of

  Here, the trigger 18 is a U-shaped flat plate member that is press-formed by sheet metal, and has a shaft 20 perpendicular to the plate surface of the trigger 18 at the upper end as shown in FIG. In FIG. 3, a contact piece 18a that is wide in the lateral direction protrudes toward the right side, as shown in FIG. As shown in FIG. 1, the trigger 18 passes the shaft 20 projecting from the upper end portion thereof from the inside through the shaft hole 12 formed in the left side wall 9 </ b> A of the pedal bracket 9. It can be turned on the side wall 9A by tightening a nut 21 that is screwed to an end protruding leftward from the side wall 9A (when the vehicle receives a large impact load from the front and an external force of a predetermined value or more is applied) ). That is, the trigger 18 is attached to the left side wall 9A so as to rotate about the shaft hole 12 (the shaft 20) along the left side wall 9A of the pedal bracket 9 (on a plane parallel to the side wall 9A). ing.

  The link mechanism 19 is disposed on the left side of the pedal arm 2 and includes a first link 23 and a second link 24 connected to each other by a pin 22. A hook-shaped engagement portion 23a (see FIG. 1) cut out in a semicircular shape opening rearward is formed at the upper end of the first link 23, and this engagement portion 23a is formed as shown in FIGS. In the normal state shown in FIG. 3 (when no large impact is received from the front of the vehicle), the outer periphery of the pedal shaft 3 is engaged from the front side of the vehicle. The lower end of the first link 23 is connected to the upper end of the second link 24 by a pin 22. The lower end of the second link 24 projects through the boss 4 that is laterally protruded from the second link 24 and is inserted and fixed to the left and right bushes 26 and the pedal arm 2 through a shaft 25 that is arranged in parallel to the shaft of the pin 22. The push nut 27 is engaged with the end portion of the shaft 25 so as to be pivotally connected to the pedal arm 2. The first link 23 and the second link 24 are arranged so that the pin 22 is positioned at the front side of the vehicle with respect to the line connecting the pedal shaft 3 and the shaft 25 at an intermediate height between the pedal shaft 3 and the shaft 25. ing.

  Incidentally, a push rod 10a extends from the brake master cylinder 10 attached to the dash panel 8 toward the rear of the vehicle, and the tip of the push rod 10a is an intermediate portion of the second link 24 (pin 22 and shaft 25). Are connected to each other by a pin 28. A spring 29, which is a coil spring, is wound around the outer periphery of the boss 4 inserted and fixed to the pedal arm 2. One end of the spring 29 is locked to the pedal arm 2 and the other end is the first link 23. The first link 23 is urged toward the rear side of the vehicle by the spring 29. By this urging, the engaging portion 23a of the first link 23 is urged in the direction in which it engages with the pedal shaft 3, and the backlash of the link mechanism 19 is absorbed.

  Further, when the pedal arm 2 is in the normal state shown in FIGS. 2 and 3 (when the vehicle does not receive a large impact load from the front), the contact piece 18a projecting laterally at the lower end of the trigger 18 is The first link 23 is positioned behind the first link 23 with a predetermined gap.

  Thus, in the present embodiment, as shown in FIGS. 2, 4 and 5, the left side wall 9A on the side where the trigger 18 of the pedal bracket 9 is attached, the support portion of the pedal arm 2 and the trigger 18, ie, around the bolt insertion hole 11 and the shaft hole 12 (see FIG. 1), bulges integrally on the left side (the side opposite to the side where the trigger 18 and the pedal shaft 3 are disposed). A reinforcing portion 30 is formed. Here, a recessed portion 9c that is recessed in a dish shape to be a tightening seat surface of the nut 17 is formed around the bolt insertion hole 11 of the left side wall 9A of the pedal bracket 9, and the reinforcing portion 30 is inserted through the bolt insertion portion. In a region extending from the lower half of the hole 11 and the shaft hole 12 to the lower end edge of the side wall 9A, a bead 30a is formed that continuously bulges to the left side continuously from the recess 9c. In detail, the reinforcing portion 30 extends substantially parallel to a straight line connecting the stepped portion, the bolt insertion hole 11, and the shaft hole 12 at the peripheral edge of the bulging shape, and around the fastening seating surface of the nut 21. The bead 30a is integrally formed to bulge to the left side formed by the step portion along the left side, and is formed to the vicinity of the flange 9a on the vehicle front side of the side wall 9A. The rigidity of the side wall 9A between the bolt insertion hole 11 and the shaft hole 12 (particularly, the bolt insertion hole 11 and the like) due to the bent shape of the step portion (periphery of the bead 30a) extending substantially parallel to the straight line connecting the bolt insertion hole 11 and the shaft hole 12. The distance between the shaft holes 12 and the rigidity for maintaining the surface shape are improved, and the arrangement relationship between the pedal shaft 3 and the trigger 18 and the surface of the side wall 9A are stabilized. As a result, the rotation of the trigger 18 that rotates along the side wall 9A is stabilized, and the contact piece 18a can be reliably moved in the direction of the first link 23. The pedal retraction restraining mechanism operates reliably after coming off the shaft 3, and the retreating of the pedal arm is restrained by the pedal retreat restraining mechanism. In addition, a groove 30b that is linearly formed along the vertical direction is formed at a position below the bolt insertion hole 11 that is an intermediate portion of the bead 30a. When the groove 30b receives an excessive force such that the side wall 9A between the insertion hole 11 and the shaft hole 12 is deformed, the deformation starts, and the reinforcing portion 30 is deformed by the groove 30b, so that the bolt insertion hole The side wall 9A between 11 and the shaft hole 12 is prevented from being deformed.

  Next, the operation of the brake pedal device 1 including the pedal retraction suppression mechanism configured as described above will be described.

  2 and 3, when the driver steps on the pedal 5 attached to the lower end of the pedal arm 2 with his / her foot, the pedal arm 2 rotates forward with respect to the pedal shaft 3 (bolt 16). The rotation of the pedal arm 2 is transmitted to the push rod 10a by the link mechanism 19, and the push rod 10a is linearly moved and pushed, so that the brake master cylinder 10 is driven and a required braking force is generated in the vehicle. Then, the vehicle is stopped or decelerated.

  By the way, when the vehicle receives a large impact load from the front, the dash panel 8 moves to the rear of the vehicle together with the pedal bracket 9 and the brake master cylinder 10 attached thereto, so that the trigger attached to the pedal bracket 9 18 also moves toward the rear of the vehicle, and the trigger 18 comes into contact with the tip of a component (not shown) such as a steering column that hardly moves on the vehicle body side. Then, as shown in FIG. 5, the trigger 18 rotates in the direction of the arrow (clockwise) about the shaft 20 with respect to the pedal bracket 9, and the contact piece 18 a protruding from the lower end of the link mechanism 19 Since the intermediate portion of the first link 23 is abutted and pressed forward of the vehicle, the engaging portion 23a at the upper end of the first link 23 is released from the pedal shaft 3 and becomes free. At this time, the lower position (position on the pin 22 side) of the first link 23 than the contact position with the contact piece 18a contacts the stopper 6 made of sheet metal of the pedal arm 2, and the pressing force from the contact piece 18a. Thus, the first link 23 can be more reliably rotated by a couple of forces due to the reaction force from the stopper 6. The locking position of the spring 29 to the first link 23 is a position below the position where the spring 29 is in contact with the contact piece 18a (position on the pin 22 side), and the biasing force of the spring 29 is also the first link 23. It acts in the direction of rotating more reliably.

  As described above, when the engaging portion 23a of the first link 23 is released from the pedal shaft 3 and becomes free, the first link 23 is moved in the direction of the arrow in FIG. And the push rod 10a pushes the second link 24 toward the rear of the vehicle (in the direction of the arrow in the figure), so that the second link 24 moves in the direction of the arrow in FIG. To the front of the vehicle about the pedal shaft 3 (bolt 16). As a result, the pedal arm 2 is turned and retracted from the position indicated by the chain line in FIG. 5 to the position indicated by the solid line, and the backward movement of the pedal arm 2 is reliably suppressed.

  Thus, in the brake pedal device 1 having the pedal retraction suppression mechanism as described above, when the vehicle receives a large impact from the front and the pedal retraction suppression mechanism acts as described above, the left side wall of the pedal bracket 9 Since a large force acts on the periphery of the bolt insertion hole 11 that is the support portion of the 9A pedal arm 2 and the shaft hole 12 that is the attachment portion of the trigger 18, this portion is easily deformed.

  However, in this embodiment, since the reinforcing portion 30 including the beads 30a and the grooves 30b is integrally formed on the left side wall 9A of the pedal bracket 9 to which the trigger 18 is attached as described above, this portion is reinforced by the reinforcing portion 30. Thus, the rigidity and strength are enhanced, and when the vehicle receives a large impact from the front, the side wall 9A of the pedal bracket 9 is prevented from being deformed, and the contact piece 18a of the trigger 18 that rotates along the side wall 9A is moved. The direction can be surely set to the intended direction (the direction toward the first link), and the contact piece 18a of the trigger 18 moves forward of the vehicle and reliably acts on the first link 23 of the link mechanism 19.

  Accordingly, there is no problem that the trigger 18 fails to contact the first link 23 of the link mechanism 19 and passes through the side of the first link 23, and the first link 23 is detached from the pedal shaft 3. The pedal retraction suppression mechanism operates reliably, and the retraction of the pedal arm 2 is suppressed by the pedal retraction suppression mechanism. And since such an effect is acquired by forming the reinforcement part 30 integrally in the side wall 9A of the pedal bracket 9, it does not cause the increase in a number of parts or a weight, but is a separate member as shown in FIG. Since it is not necessary to weld the reinforcing plate 141 to the pedal bracket 9, an effect that productivity is improved can be obtained.

  In the above description, the present invention is applied to the brake pedal device. However, the present invention is naturally applicable to the clutch pedal device.

1 Brake pedal device (pedal device)
2 Pedal Arm 3 Pedal Shaft 5 Pedal 8 Dash Panel 9 Pedal Bracket 9A, 9B Side Wall of Pedal Bracket 10 Brake Master Cylinder 10a Brake Master Cylinder Push Rod 11 Bolt Insertion Hole 12 Shaft Hole 18 Trigger 19 Link Mechanism 23 First Link 24 First 2 links 30 Pedal bracket reinforcement 30a Bead 30b Groove

Claims (2)

A pedal arm whose upper end is pivotally supported by a pedal shaft on left and right side walls of a pedal bracket attached to the dash panel, and an operation in which the dash panel moves rearward in response to an impact load from the front of the vehicle A pedal retraction suppressing mechanism that rotates the pedal arm forward in conjunction with the pedal, a link mechanism including a link that removably engages the pedal retraction suppressing mechanism with the pedal shaft, and the pedal bracket In the pedal device for a vehicle comprising a trigger rotatably attached to one side wall of the vehicle,
A pedal device for a vehicle, wherein a reinforcing portion is integrally formed on a side wall of the pedal bracket on a side to which the trigger is attached, around the support portion of the pedal arm and the attachment portion of the trigger. 2. The vehicle pedal device according to claim 1, wherein the reinforcing portion is configured by a bead extending substantially parallel to a straight line connecting the support portion of the pedal arm and the mounting portion of the trigger.

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