JP2008259562A - Reclining device with memory mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust a seatback to an optional inclination angular position, to store an original inclination angular position when moving the seatback to a forward tilted position by a walk-in operation or the like and to restore it to the inclined position. <P>SOLUTION: A free plate 30 is provided with a notched groove 36 for receiving therein a projection portion 17a of a lock gear 17 and a free portion 37 for allowing the projection portion 17a of the lock gear 17 to get thereon, a memory plate 31 is provided with an externally toothed gear 40 engageable with another internally toothed gear 7 of a gear plate 5, and the memory plate 31 is supported at a position where the external gear 40 is not engaged with the other internally toothed gear 7 of the gear plate 5. A lever plate 22 is provided with a step portion 42 for bringing the external gear 40 of the memory plate 31 into engagement with the another internally toothed gear 7 of the gear plate 5 in order to memorize an adjustment angular position of the seatback, and also with a cam hole 25 for withdrawing the projection portion 17a of the lock gear 17 from the notched groove 36 of the free plate 30 to allow it to get onto the free portion 37, so that the seatback is brought into a lock free state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention makes it possible to adjust the seat back to an arbitrary tilt angle position, and to store the original tilt angle position and return to the tilt angle position when the seat back is moved to the forward position by a walk-in operation or the like. The present invention relates to a reclining device having a mechanism.

  Conventionally, the tilt angle position of the seat back is adjusted by operating the first handle, the adjustment angle position of the seat back is memorized by operating the second handle, and the seat back is moved to the forward position and moved forward. A reclining device having two handles for returning and locking to the previous original adjustment angle position is known from JP-A-11-351236. This known reclining device includes a lock unit having an outer gear and two pins between a movable flange and a fixed flange, a lock device that engages with the lock unit, and a lock unit that engages with the lock device and removes the lock unit. A spring that urges radially to mesh the outer gear with the inner gear of the movable flange, and a first gear that is pivotally disposed on the control shaft of the first handle and engages one pin of the lock device and the lock unit. 1 control plate is disposed, and the tilt angle of the seat back is adjusted by rotating the first control plate by operating the first handle to disengage the outer gear of the lock unit from the inner gear of the movable flange. I can do it. Further, a second control plate having a metal sleeve that engages with the first control plate and has a second handle attached thereto, a pin that engages with an outer support edge of the second control plate, and an outer side that engages and disengages with the inner gear of the movable flange. A memory holding unit having a gear, a memory holding control device having a notch and a limit stopper for attaching the memory holding unit and guiding a pin of the lock unit, and rotating the memory holding unit and the memory holding control device. A circular rib having a restricting stopper attached to a fixed flange is provided for guiding, and the second control plate is rotated by operating the second handle, and the outer support edge of the second control plate is stored and held. The seat back tilt position is memorized by engaging the pin of the unit and engaging the outer gear of the memory holding unit with the inner gear of the movable flange. 2 By rotating the control plate, the first control plate is rotated, the outer gear of the lock unit is disengaged from the inner gear of the movable flange, and the lock unit is further moved radially inward to move one peg of the lock unit. The seat back can be moved to the forward position by removing the notch of the holding control device and rotating the movable flange with the memory holding unit and the memory holding control device with respect to the fixed flange. The movable flange is rotated in the opposite direction together with the memory holding unit and the memory holding control device, and the limit back of the memory holding control device is brought into contact with one pin of the lock unit so that the seat back is tilted forward. It can be returned to the position.

JP-A-11-351236

  In the above-described conventional reclining device, the lock unit is released and stored by two control plates, the first control plate that is rotated by the operation of the first handle and the second control plate that is rotated by the operation of the second handle. In order to control the holding unit, the structure thereof is very complicated, and the movements of the two control plates are deviated, so that the adjustment inclination angle of the seat back cannot be stored accurately.

  An object of the present invention is to provide a reclining device having a memory mechanism that has a very simple structure, accurately stores the adjustment inclination angle of the seat back, and accurately and reliably returns to the stored adjustment inclination angle.

  A reclining device having a memory mechanism according to the present invention has a gear between a base plate pivotally supported by a pivot shaft and a gear plate pivotally assembled to the base plate and pivotally supported by a cylindrical portion of the lever plate. A lock gear having external teeth that can be engaged with and disengaged from the internal teeth of the plate, and a spring that is rotatably fitted to the rotation shaft and engages with the lock gear to mesh the external teeth of the lock gear with the internal teeth of the gear plate. And a lever that engages the cam and the lock gear and slides the lock gear radially inward by the rotation of the cam to disengage the outer teeth of the lock gear and the inner teeth of the gear plate. Plate. An operating lever is attached to one end of the rotating shaft, the other end of the rotating shaft is inserted into a tubular portion attached to the lever plate, and a pedal is attached to the tubular portion of the lever plate. The free plate arranged on the outer peripheral surface of the lock gear is provided with a notch groove for accommodating the projection of the lock gear and a free portion on which the projection of the lock gear rides, and the memory plate provided on the free plate is provided with a gear. An external tooth that can mesh with another internal tooth of the plate is provided, and the memory plate is supported at a position where the external tooth of the memory plate does not mesh with another internal tooth of the gear plate. The lever plate is provided with a step for pressing the memory plate to engage the external teeth of the memory plate and another external gear of the gear plate in order to memorize the adjustment angle position of the seat back by operating the pedal. In order to obtain a lock-free state, a cam hole is formed that engages with a cam protrusion of the lock gear, extracts the protrusion of the lock gear from the notch groove of the free plate, and rides on the free portion.

  The rotating shaft of the present invention is provided with an annular portion having an arc groove so as to abut on the outer surface of the base plate, and a stopper inserted into the arc groove of the annular portion is projected on the outer surface of the base plate. The rotation of the plate is provided with a rotation of a rotation shaft regulated at a certain angle, for example, about 17 °. In addition, a chamfered portion that fits the cam through the shaft hole of the cam is formed on the rotating shaft, and a play is provided in the shaft hole of the cam that is fitted to the chamfered portion of the rotating shaft. There is provided a rotation of about 17 ° + about 10 ° = about 27 ° between a rotation of about 17 ° of the rotation shaft and a rotation of a constant angle, for example, a cam restricted to about 10 °.

  In the seat back lock-off state of the present invention, in order to disengage the external teeth of the lock gear from the internal teeth of the gear plate and position the protrusion of the lock gear in the notch groove formed in the free plate, The arc-shaped spring that is biased so as to be pressed is engaged with the protrusions of the two lock gears.

  In the reclining device according to the present invention, the engagement between the lock gear and the gear plate is released by the cam hole of the lever plate, and the memory plate is engaged with the gear plate by the step portion of the lever plate. Since it is possible to release and control the engagement and disengagement of the memory plate, the structure is very simple and the seat back adjustment angle can be accurately stored and the stored adjustment angle position can be accurately and reliably returned. In addition, the lock gear is pushed so as to urge outward in the radial direction by a spring, so that the lock gear protruding portion positioned in the notch groove of the free plate is pulled to the position where it accidentally rides on the free portion when the operation lever is operated. Can be prevented.

  The reclining device according to the present invention includes a circular base plate 3 attached to the fixed flange 1 via a cover plate 2 and a circular gear plate 5 attached to the movable flange 4 (see FIG. 2). A tooth 6 and another internal tooth 7 having a diameter smaller than the inner diameter of the inner tooth 6 are formed in two stages, and are assembled to the base plate 3 by a fixing ring 8 so as to be rotatable.

  The base plate 3 is pivotally supported on a rotating shaft 9 together with the cover plate 2 and the fixed flange 1, and the rotating shaft 9 has an operation lever 10 attached to one end thereof and forms an annular body 12 between the cover plate 2 and the base plate 3. The annular body 12 has an arc groove 11 into which the stopper 13 mounted on the base plate 3 is inserted, and the rotation of the rotating shaft 9 is restricted by the stopper 13 within the arc groove 11 of the annular body 12, so that the operation lever By the operation of 10, the rotation shaft 9 can rotate only about 17 °. Further, a chamfer 15 for rotating the cam 14 is formed on the rotation shaft 9.

  Between the base plate 3 and the gear plate 5, there are provided two lock gears 17 having external teeth 16 that can be engaged with and disengaged from the internal teeth 6 of the gear plate 5, and the lock gear 17 has a protrusion 17 a on its upper surface and the protrusions. A cam projection 17b is provided on the upper surface of 17a, and can slide diametrically inward and outward along a fixed guide 18 formed on the inner surface of the base plate 3. The cam projection 17b is fitted to the chamfered portion 15 of the rotary shaft 9. The cam 14 has a shaft hole 19 to be engaged. The cam 14 is rotationally biased by two springs 20 attached to the inner surface of the base plate 3, presses the lock gear 17 in the radially outward direction, and engages the outer teeth 16 of the lock gear 17 with the inner teeth 6 of the gear plate 5. Is locked. Further, the cam 14 has a play in the shaft hole 19 and is rotatably fitted to the chamfered portion 15 of the rotating shaft 9.

  A lever plate 22 is disposed on the cam 14 via a washer 21, and the lever plate 22 has two pin holes 24 into which two pins 23 projecting on the cam 14 are fitted, and a protruding portion of the lock gear 17. A cam hole 25 that engages with a cam projection 17b provided on 17a is formed. When the rotation shaft 9 is rotated by the operation of the operation lever 10, the cam 14 rotates against the spring 20, and the lever plate 22 rotates about the rotation shaft 9 as the cam 14 rotates. Since the cam hole 25 of the lever plate 22 causes the cam protrusion 17b of the lock gear 17 to be pulled in radially inward, the outer teeth 16 of the lock gear 17 are disengaged from the inner teeth 6 of the gear plate 5, and the seat back is locked off. .

  The washer 21 is disposed between the lock gear 17 and the lever plate 22, and a projection 26 is formed on the washer 21, and the projection 26 is only the projection 17 a of the lock gear 17 between the lock gear 17 and the lever plate 22. Since the cam projection 17b provided on the protrusion 17a of the lock gear 17 is engaged with the cam hole 25 of the lever plate 22, the washer 21 is provided between the lock gear 17 and the lever plate 22. Acts as a spacer. Further, the washer 21 has a central hole 27 through which the rotating shaft 9 is inserted. A concave groove 28 is formed in the peripheral edge of the central hole 27, and the concave groove 28 is fitted with the pin 23 of the cam 14. As the cam 14 rotates, the washer 21 also rotates.

  The spring 29 disposed on the washer 21 is an arc-shaped spring, and both end edges thereof are hooked on the protrusions 17a of the lock gear 17 so as to press the two lock gears 17 radially outward. It is fast.

  The free plate 30 disposed on the outer periphery of the two lock gears 17 is a ring-shaped plate, and three protrusions 33 for rotatably mounting the memory plate 31 to the free plate 30 on the circumferential surface thereof. , 34, and 35, and a notch groove 36 for inserting the protruding portion 17a of the lock gear 17 is formed in the inner peripheral edge, and a free portion 37 on which the protruding portion 17a of the lock gear 17 rides is formed. A ring portion of a spring 32 is attached to the protrusion 33, a hole 38 of the memory plate 31 is fitted to the protrusion 34, and the memory plate 31 is rotatably supported, and the memory plate 31 is spring-supported to the protrusion 35. A protrusion 39 formed on the memory plate 31 is brought into contact with the memory plate 31 in order to prevent it from being pulled too far into the inside by 32. In the locked state of the seat back in which the outer teeth 16 of the lock gear 17 are engaged with the inner teeth 6 of the gear plate 5, the protrusion 17 a of the lock gear 17 is inserted into the notch groove 36 of the free plate 30. When the 17 protruding portion 17a is pulled out from the notch groove 36 of the free plate 30 to the position where the protruding portion 17a rides on the free portion 37, the outer teeth 16 of the lock gear 17 are disengaged from the inner teeth 6 of the gear plate 5, and the seat back is unlocked. It becomes the state of.

  The memory plate 31 mounted on the free plate 30 includes a projection 39 that contacts the projection 35 of the free plate 30, a hole 38 for fitting the projection 34 of the memory plate 31, and another gear plate 5. It has external teeth 40 that can mesh with the internal teeth 7, and is rotatably supported by the protrusions 34 of the free plate 30. One end of the memory plate 31 is engaged with the free plate 30 and the other end of the memory plate 31 is engaged with the protrusion 41 of the memory plate 31 by a spring 32 with the protrusion 34 of the free plate 30 as a rotation axis. 40 is urged in a direction to separate from another internal tooth 7 of the gear plate 5. When the stepped portion 42 provided on the lever plate 22 presses the memory plate 31, the external teeth 40 of the memory plate 31 mesh with the other internal teeth 7 of the gear plate 5 against the urging force of the spring 32.

  The lever plate 22 is disposed on the washer 21, has a pin hole 24 for fitting the pin 23 of the cam 14, and the pin 23 of the cam 14 is fitted into the pin hole 24 of the lever plate 22. When the cam 14 is rotated by operating 10, the lever plate 22 also rotates as the cam 14 rotates. In this case, since the operating lever 10 is rotated only about 17 ° by the arc groove 11 and the stopper 13, the lever plate 22 is also rotated only by that amount. A cylindrical portion 43 is integrally attached to the lever plate 22 and a stepped portion 42 is formed at the outer peripheral end thereof. The cylindrical portion 43 is inwardly passed through a central hole 44 of the gear plate 5 and a central hole 45 of the movable flange 4. The connecting rod 46 is attached to the end portion of the lever plate 22 and the pedal 47 is attached. The rotating shaft 9 is inserted into the cylindrical portion 43 of the lever plate 22 to extend inward, and the connecting rod 48 is extended to the other end. Is installed. The lever plate 22 can also be rotated by operating the pedal 47. In this case, the pedal 47 is fitted with the shaft hole 19 of the cam 14 with a play of about 10 ° with respect to the chamfered portion 15 of the rotating shaft 9, so Movement, 17 ° + cam rotation, 10 ° = 27 °), and therefore the lever plate 22 can also be rotated accordingly. The step 42 formed on the circumferential edge of the lever plate 22 presses the memory plate 31 by rotating the lever plate 22 by about 27 °, and the external teeth 40 of the memory plate 31 mesh with the other internal teeth 7 of the gear plate 5. And memorize the adjustment angle position of the seat back.

  Hereinafter, the normal reclining adjustment operation of the seat back will be described. When reclining adjustment is performed by operating the operation lever 10, the cam 14 and the lever plate 22 are rotated as the rotation shaft 9 is rotated by the operation of the operation lever 10. The lever plate 22 can only be rotated up to about 17 °, and the lever plate 22 can also be rotated by that amount. Therefore, the lever plate 22 is rotated to a position where the stepped portion 42 presses the memory plate 21 as shown in FIG. The cam hole 25 of the lever plate 22 does not move, and the cam projection 17b of the lock gear 17 does not retract to a position where the protruding portion 17a of the lock gear 17 rides on the free portion 37 of the free plate 30. Therefore, when the operation lever 10 is operated, the external teeth 40 of the memory plate 31 are not engaged with the other internal teeth 7 of the gear plate 5, and the protrusion 17 a of the lock gear 17 comes out of the notch groove 36 of the free plate 30. Therefore, even if the gear plate 5 rotates, the free plate 14 does not rotate, and the normal reclining in which the external teeth 16 of the lock gear 17 are removed from the internal teeth 6 of the gear plate 5 and meshed again at a new angular position. It becomes adjustment.

  Next, an operation of storing the adjustment angle position of the seat back, moving the seat back to the forward tilt position, and returning to the adjustment angle position before the forward tilt and locking will be described.

  When the pedal 47 is operated at an arbitrary reclining adjustment position, the cylindrical portion 43 attached to the pedal 47 is rotated, and the lever plate 22 having the cylindrical portion 43 is also rotated. 14 can be rotated up to 27 ° by the play of the shaft hole 19, and the lever plate 22 is also rotated to that extent, so that the stepped portion 42 of the lever plate 22 has the memory plate 31 as shown in FIG. The memory plate 31 is pressed by the step portion 42 of the lever plate 22 and rotates about the protrusion 34 against the urging force of the spring 32, and the external teeth 40 are rotated. The adjustment angle position of the seat back is memorized by engaging with another internal tooth 7 of the gear plate 5.

  Simultaneously with the meshing of the external teeth 40 of the memory plate 31 and the internal teeth 7 of the gear plate 5, the cam hole 25 of the lever plate 22 moves the external teeth 16 of the lock gear 17 from the internal teeth 6 of the gear plate as shown in FIG. At the same time, the cam projection 17b of the lock gear 17 is further pulled into the position where the protrusion 17a of the lock gear 17 rides on the free portion 37 of the free plate 30, so that the protrusion 17a of the lock gear 17 extends from the notch groove 36 of the free plate 30. It will come out, so that the seat back can be moved forward.

  Since the memory plate 31 storing the adjustment angle position meshes with the external teeth 7 of the gear plate 5 when the seat back is moved forward, when the gear plate 5 rotates with respect to the base plate 3, the gear plate 5 rotates. The free plate 30 also rotates together with the plate 5, and the cam hole 25 of the lever plate 22 pulls the protruding portion 17a of the lock gear 17 over the free portion 37 of the free plate 30, so that the protruding portion 17a of the lock gear 17 is It rides on the free part 37 of the free plate 30 and enters a lock-free state (see FIG. 7). Since the memory plate 31 is on the stepped portion 42 of the lever plate 22 as shown in FIG. 7 in the forward lock-free state, the external teeth 40 of the memory plate 31 and the internal teeth 7 of the gear plate 5 are Engagement is maintained.

  In the case of returning from the lock-free forward-turned state to the original adjustment angle position, when the gear plate 5 is rotated with respect to the base plate 3, the gear plate 5 is rotated together with the free plate 30 and the free portion 37 of the free plate 30. 8, when the notch groove 36 of the free plate 30 reaches the protrusion 17a of the lock gear 17 beyond the protrusion 17a of the lock gear 17, the protrusion 17a of the lock gear 17 is moved by the spring 20 and the spring 29. It falls into the notch groove 36 of the free plate 30, the external teeth 16 of the lock gear 17 mesh with the internal teeth 6 of the gear plate 5, and the seat back is locked again at the original adjustment angle position stored by the memory plate 31. . At the same time, the memory plate 31 also falls from the step portion 42 of the lever plate 22, and the meshing between the external teeth 40 of the memory plate 31 and the internal teeth 7 of the gear plate 5 is released.

It is a vertical front view which shows the locked state of the seat back seen from the gear plate side of the reclining apparatus by this invention. It is a vertical side view along the AA line of FIG. It is a disassembled perspective view of the main structural members of the reclining apparatus by this invention. It is a vertical front view of the basic structural member seen from the washer side of the reclining device by this invention. It is the same longitudinal cross-sectional front view as FIG. 1 which shows reclining adjustment of the seat back of the reclining apparatus by this invention. It is a longitudinal front view similar to FIG. 1 which shows the state which memorize | stores the adjustment angle position of the seat back of the reclining apparatus by this invention. It is the same longitudinal cross-sectional front view as FIG. 1 which shows the state in which the seat back of the reclining device according to the present invention is brought forward. FIG. 2 is a longitudinal front view similar to FIG. 1 showing a state in which the seat back of the reclining device according to the present invention is returned from the forward tilt state to the original adjustment angle position.

Explanation of symbols

3 Base plate 5 Gear plate 6 Internal teeth 7 Other internal teeth 9 Rotating shaft 10 Operation lever 11 Arc groove 12 Annular portion 13 Stopper 14 Cam 15 Chamfered portion 16 External teeth 17 Lock gear 17a Protruding portion 17b Cam projection 19 Shaft hole 20 Spring 22 Lever plate 25 Cam hole 29 Spring 30 Free plate 31 Memory plate 36 Notch groove 37 Free portion 40 External tooth 42 Step portion 43 Tubular portion

Claims (3)

A base plate (3) pivotally supported by a rotating shaft (9) and a gear plate (which is rotatably attached to the base plate (3) and pivotally supported by a cylindrical portion (43) of the lever plate (22). 5) and a lock gear (17) having an external tooth (16) detachable with an internal tooth (6) of the gear plate (5),
The rotary shaft (9) is rotatably fitted and engaged with the lock gear (17) so that the external teeth (16) of the lock gear (17) are engaged with the internal teeth (6) of the gear plate (5). A cam (14) that is rotationally biased by a spring (20);
The cam (14) and the lock gear (17) are engaged with each other, and the lock gear (17) is slid inwardly by the rotation of the cam (14), so that the external teeth (16) of the lock gear (17) and the gear plate ( 5) a lever plate (22) for disengaging the inner teeth (6) of
The operating lever (10) is attached to one end of the rotating shaft (9), the other end of the rotating shaft (9) is inserted into the tubular portion (43) attached to the lever plate (22), and the tubular portion of the lever plate (22) is inserted. (43) has a pedal (47) attached,
A notch groove (36) for accommodating the protrusion (17a) of the lock gear (17) and the protrusion (17a) of the lock gear (17) ride on the free plate (30) disposed on the outer peripheral surface of the lock gear (17). And a free part (37) that goes up,
The memory plate (31) rotatably attached to the free plate (30) includes external teeth (40) that can mesh with another internal tooth (7) of the gear plate (5),
On the lever plate (22), the memory plate (31) is pressed by the operation of the pedal (47) to press the memory plate (31) and the external teeth (40) of the memory plate (31) and the gear plate ( 5) having a step portion (42) for meshing with another internal tooth and engaging the cam protrusion (17b) of the lock gear (17) to bring the seat back into a lock-free state. A reclining device having a memory mechanism, characterized in that a cam hole (25) is formed by extracting the protrusion (17a) from the notch groove (36) of the free plate (30) and riding on the free portion (37).   The rotating shaft (9) includes an annular portion (12) having an arc groove (11) so as to abut on the outer surface of the base plate (3), and is inserted into the arc groove (11) of the annular portion (12). A stopper (13) is projected on the outer surface of the base plate (3), and the lever plate (22) is rotated by the operating lever (10) by rotating the rotating shaft (9) regulated at a fixed angle. A chamfered portion (15) for fitting the cam (14) through the shaft hole (19) of the cam (14) is formed on the rotating shaft (9), and the chamfered portion (15) of the rotating shaft (9) is formed. The shaft (19) of the cam (14) to be fitted with the play is provided with play, and the rotation of the rotation shaft (9) is restricted to a certain angle for the rotation of the lever plate (22) by the pedal (47). The reclining device according to claim 1, further comprising a cam and a rotation of the cam.   When the seat back is in the lock-off state, the external teeth (16) of the lock gear (17) are disengaged from the internal teeth (6) of the gear plate (5), and the protrusion (17a) of the lock gear (17) is free plate (30). An arc-shaped spring (29) that urges the lock gear (17) to press radially outward is positioned on the protrusion (17a) of the lock gear (17). The reclining device according to claim 1, wherein the reclining device is locked.

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