JP5640558B2 - Reclining device - Google Patents

Description

  The present invention relates to a reclining device, and more specifically, after the seat back locked at one angle of a plurality of angle adjustment ranges is unlocked by a recliner and switched to a forward leaning posture, the angle adjustment before the switching is performed. The present invention relates to a so-called memory reclining device in which the one angle adjustment position can be set to a first-stage lock position when returning to the range.

  Conventionally, after switching a seat back whose angle is adjusted by a pair of recliners to a forward leaning posture, when the seat back is returned to the state before the switching, a reclining device that can return the seat back to this angle adjusted posture is already known. ing. Here, Patent Document 1 described below describes a memory reclining device in which a recliner with a memory mechanism is disposed only on one side and a normal recliner is disposed on the other side. Specifically, a rod for transmitting the unlocking is arranged between one recliner with a memory mechanism and the other normal recliner. When one recliner is unlocked, the recliner is moved from one to the other. The release force is transmitted and the other recliner is also released, but when one memory mechanism is released, the release force is transmitted from one memory mechanism to the other recliner, but from the other recliner. A clutch mechanism is arranged so that the release force is not transmitted to one recliner. As a result, the memory reclining mechanism is realized despite the fact that there is only one recliner with a memory mechanism, and it is compact.

Japanese Patent No. 3636515

  However, in the technique of Patent Document 1 described above, since the lever constituting the clutch mechanism projects in the radial direction of the rod, the reclining device is large.

  The present invention intends to solve such a problem, and its purpose is to return the seat back to the state before the switching after switching the seat back whose angle is adjusted by the pair of recliners to the forward leaning posture. Even a reclining device capable of returning the seat back to this angle-adjusted posture is to provide a compact device with a simple structure.

The present invention is for achieving the above object, and is configured as follows.
The invention according to claim 1 is a pair of recliners that can be switched between a locked state that restricts the tilt of the seat back relative to the seat cushion and an unlocked state that releases the restriction, and a seat that is angle-adjusted by the pair of recliners. And a memory lock mechanism that allows the seat back to be returned to the posture after adjusting the angle before switching, and when one of the recliners is switched from the locked state to the unlocked state, A reclining device in which the other recliner can be switched from the locked state to the unlocked state by rotating the shaft member in accordance with the switching, and the other recliner is switched from the locked state to the unlocked state on the axis of the shaft member. Sometimes, the rotation associated with this change is transmitted to one recliner. It is provided with a clutch mechanism to prevent the shaft member may be switched to one of the recliner from the locked state and the first rod that can be switched to the unlock state, the unlocked state the other recliner from the locked state A second rod, and the clutch mechanism is configured such that the first rod or the tip of the second rod is inserted into the tip of the second rod or the first rod, When one of the insertion portions of these rods is rotated so that one recliner is in the unlocked state from the locked state, the rotation can be transmitted to the second rod. A cover for restricting the insertion is provided so as to be inserted into the housing .
According to this configuration, in the type in which the recliner with a memory mechanism is only on one side as in the prior art, the lever constituting the clutch mechanism does not protrude in the radial direction of the rod. The part can be made compact. Moreover, according to this structure, unlike the prior art, since it is not necessary to weld a lever to a rod, the assembly | attachment property of a clutch mechanism can be improved.

FIG. 1 is a schematic perspective view of a rear seat to which the reclining device of the present invention is applied. FIG. 2 is a longitudinal sectional view of a part of the seat frame of the rear seat in FIG. 1, mainly a longitudinal sectional view of the reclining device. FIG. 3 is an exploded perspective view of the left release shaft, the connecting rod, and the right release shaft that connect the pair of left and right recliners in FIG. 2. FIG. 4 shows a state in which the back frame of FIG. 2 is in a normal posture, and is a side view of the reclining device at this time as seen from the left side (a side view seen from the line AA in FIG. 2). FIG. 5 is a side view of the reclining device in FIG. 4 as viewed from the right side. FIG. 6 shows a state in which the operation knob is operated to adjust the tilt angle of the back frame of FIG. 4, and is a side view of the reclining device viewed from the left side at this time. FIG. 7 is a side view of the reclining device in FIG. 6 as viewed from the right side. FIG. 8 shows a state in which the back frame of FIG. 6 is recline-adjusted backward, and is a side view of the reclining device viewed from the left side at this time. FIG. 9 is a side view of the reclining device in FIG. 8 viewed from the right side. FIG. 10 shows a state in the middle of switching the back frame of FIG. 4 to the forward inclined posture by the operation lever, and is a side view of the reclining device at this time as seen from the left side. FIG. 11 is a side view of the reclining device in FIG. 10 as viewed from the right side. FIG. 12 shows a state where the back frame of FIG. 10 has been switched to the forward tilted posture, and is a side view of the reclining device viewed from the left side at this time. FIG. 13 is a side view of the reclining device in FIG. 12 as viewed from the right side. 14 is a side view as viewed from the line BB in FIG. 2, (A) shows a state before operating the operation knob, and (B) shows a state after the operation of (A). Is shown. FIG. 15 is a side view taken along line BB in FIG. 2, (A) shows a state before operating the operation lever, and (B) shows a state after the operation of (A). Is shown.

  Hereinafter, the form for implementing this invention is demonstrated using FIGS. In the following description, as an example of “seat cushion, seat back”, “seat cushion 2 and seat back 3 of the passenger seat side rear seat 1 (hereinafter simply referred to as“ rear seat 1 ”)” is an example. I will explain to you. In the following description, the terms “up”, “down”, “front”, “rear”, “left”, and “right” refer to the directions of “up”, “down”, “front”, “rear”, “left”, and “right” as described The direction of up, down, front, back, left and right is shown.

  First, a schematic configuration of the rear seat 1 according to the embodiment of the present invention will be described with reference to FIG. The rear seat 1 mainly includes a seat cushion 2 and a seat back 3. Hereinafter, the seat cushion 2 and the seat back 3 will be described individually.

  First, the seat cushion 2 will be described. The seat cushion 2 mainly includes a known cushion frame 10 that forms a skeleton thereof, a known cushion pad (not shown) that is assembled to the cushion frame 10 in a covering manner, and a known cover that covers the surface of the cushion pad. And the outer skin 2a.

  Lower arms 12 and 14 are fastened to the left and right rear ends of the cushion frame 10. Thereby, the back frame 20 of the seat back 3 can be assembled to the cushion frame 10 via the reclining device R described later.

  Further, the cushion frame 10 is assembled to a vehicle floor (not shown) through a known slide rail (not shown) at the left and right front and rear ends (four corners of the cushion frame). Thereby, the seat cushion 2, that is, the rear seat 1, can be slid in the front-rear direction. The seat cushion 2 is configured in this way.

  Next, the seat back 3 will be described. Similarly to the seat cushion 2 described above, the seat back 3 mainly includes a back frame 20 that forms a skeleton thereof, a known cushion pad (not shown) that is assembled to the back frame 20 in a wrapping manner, and the cushion pad. It is comprised from the well-known skin 3a which covers the surface of this.

  The back frame 20 is also well known, and the left and right side frames 22, 24, the upper frame 26 that bridges the upper ends of the left and right side frames 22, 24, and the lower ends of the left and right side frames 22, 24 are connected to each other. It is comprised from the lower panel 28 which passes over an end to the substantially rectangular frame shape. An operation lever 3b is assembled to the seat back 3 in the vicinity of the shoulder on the back side. The seat back 3 is configured in this way.

  Next, the reclining device R for assembling the back frame 20 to the cushion frame 10 will be described. The reclining device R includes a pair of left and right recliners 50 and 70 and a memory lock mechanism M (not shown in FIG. 1). Hereinafter, the pair of left and right recliners 50 and 70 and the memory lock mechanism M will be described individually.

  First, the left recliner 50 will be described with reference to FIG. The left recliner 50 is a known one and includes a guide 52 and a ratchet 54. The guide 52 and the ratchet 54 are assembled so as to be relatively rotatable, and at all times (when the operation lever 3b and the operation knob 56 are not operated), the rotation is performed between the guide 52 and the ratchet 54. Is locked by a locking mechanism (not shown).

  When the left recliner 50 rotates the left release shaft 80 inserted into the guide 52 and the ratchet 54 via the operation knob 56 disposed on the outer side surface of the seat cushion 2. The lock state is configured to switch to the unlock state. The left release shaft 80 corresponds to a “first rod” recited in the claims.

  The guide 52 is fastened to the left lower arm 12 of the cushion frame 10. The ratchet 54 is assembled to the left side frame 22 of the back frame 20 via a memory ratchet 42 described later. The left recliner 50 corresponds to “one recliner” recited in the claims.

  Next, the right recliner 70 will be described. The right recliner 70 is also a known one similar to the recliner 50 described above, and includes a guide 72 and a ratchet 74. Both the guide 72 and the ratchet 74 are assembled so as to be relatively rotatable, and the rotation is always locked by a locking mechanism (not shown) inside the guide 72 and the ratchet 74. ing.

  When the right release shaft 82 inserted into the guide 72 and the ratchet 74 is also rotated via the operation bracket 76 in the right recliner 70, the locked state is switched to the unlocked state. It is configured. Flat end portions 82a1 and 82a1 are formed on the outer peripheral surface of the inner end portion 82a of the right release shaft 82 so as to face each other. The release shaft 82 on the right corresponds to a “second rod” recited in the claims.

  The guide 72 is also fastened to the right lower arm 14 of the cushion frame 10. The ratchet 74 is also assembled to the right side frame 24 of the back frame 20. The right recliner 70 corresponds to “the other recliner” recited in the claims.

  The angle of the seat back 3 can be adjusted with respect to the seat cushion 2 by the pair of left and right recliners 50 and 70. That is, the seated person can adjust the tilt posture of the seat back 3 so that the tilt angle is his / her favorite tilt angle.

  The left release shaft 80 and the right release shaft 82 described above are connected via a connecting rod 84. The left release shaft 80, the right release shaft 82, and the connecting rod 84 correspond to “shaft members” recited in the claims. The connecting rod 84 includes a main shaft 86 and a clutch shaft 88. Hereinafter, the main shaft 86 and the clutch shaft 88 will be described individually.

  First, the main shaft 86 will be described with reference to FIG. The main shaft 86 is composed of a round pipe member formed in a cylindrical shape. An inner end 80 a of the left release shaft 80 is fastened inside the one end side of the main shaft 86. A shaft portion 88a of a clutch shaft 86, which will be described later, is fastened inside the other end of the main shaft 86. The main shaft 86 is configured in this way.

  Next, the clutch shaft 88 will be described. The clutch shaft 88 includes a shaft portion 88a formed in a round bar shape and a clutch portion 88b having an insertion hole 88b1 into which an inner end portion 82a of the right release shaft 82 can be inserted. Protrusions 88b2 and 88b2 are formed on the inner peripheral surface of the insertion hole 88b1. The protrusions 88b2 and 88b2 can contact the flat end portions 82a1 and 82a1 of the right release shaft 82.

  Accordingly, when the left release shaft 80 is rotated so that the left recliner 50 is changed from the locked state to the unlocked state, this rotation can be transmitted to the right release shaft 82 and the right recliner 70. When the right release shaft 82 is rotated so that the state changes from the locked state to the unlocked state, this rotation can be prevented from being transmitted to the left release shaft 80.

  That is, only the rotation from the left recliner 50 can be transmitted to the right recliner 70. This description is described in the claims, “Even when the other recliner is switched from the locked state to the unlocked state on the axis of the shaft member, its rotation accompanying this switching is transmitted to one recliner. It is provided with a clutch mechanism that prevents this from occurring.

  When the inner end 82a of the right release shaft 82 is inserted into the insertion hole 88b1 of the clutch shaft 88, the end 82a of the insertion hole 88b1 is in the unlocked state from the left recliner 50. When the left release shaft 80 is rotated so as to become, a rubber cover 90 for restricting the insertion is provided so that the rotation can be transmitted to the right release shaft 82. ing. The clutch shaft 88 is configured in this way.

  Next, the memory lock mechanism M will be described with reference to FIGS. The memory lock mechanism M mainly includes a base plate 30, an operation plate 32, a pole 34, a hook 38, and a memory ratchet 42. Hereinafter, the base plate 30, the operation plate 32, the pole 34, the hook 38, and the memory ratchet 42 will be described individually.

  First, the base plate 30 will be described. The base plate 30 is a thin plate member that forms the base of the memory lock mechanism M. One end of an outer cable 60a in a first operation cable 60 to be described later, one end of a tension spring 32b to be described later, and one end of an outer cable 62a in a second operation cable 62 to be described later can be hung on the base plate 30. Three pieces 30a, 30b, 30c (hereinafter referred to as "first cut and raised piece 30a, second cut and raised piece 30b, third cut and raised piece 30c") are cut and raised. The base plate 30 is fastened to the left side frame 22 of the back frame 20. The base plate 30 is configured in this way.

  Next, the operation plate 32 will be described. The operation plate 32 is a member formed in a substantially square shape that transmits a pulling force of a first operation cable 60 described later to the hook 38. One end of an inner cable 60b of a first operation cable 60 described later is hooked to one end of the operation plate 32. A long hole 32 a is formed at the other end of the operation plate 32. The operation plate 32 is pivotally attached to the base plate 30 via pins 36.

  At this time, a tension spring 32 b is hung between one end of the operation plate 32 and the second cut and raised piece 30 b of the base plate 30. Accordingly, when the operation plate 32 is rotated by the pulling force of the first operation cable 60, when the pulling force is released, the operation plate 32 is returned to the state before the rotation by the restoring force of the tension spring 32b. Can do. The operation plate 32 is configured in this way.

  Next, the pole 34 will be described. The pole 34 is a member for holding a state in which a protrusion 38 a of a hook 38 described later is engaged with a concave groove 42 a of the memory ratchet 42. The pole 34 is formed with a pressing portion 34 a for pressing the hook 38. The pole 34 is integrally fastened to the operation plate 32.

  The pole 34 is formed so that the pressing portion 34a presses the hook 38 when a projection 38a of the hook 38, which will be described later, is engaged with a concave groove 42a of the memory ratchet 42. Yes. The pole 34 is configured in this way.

  Next, the hook 38 will be described. As described above, the hook 38 is formed with a protrusion 38a that can be engaged with a concave groove 42a of a memory ratchet 42 described later. The hook 38 is formed with a guide pin 38b that is guided by the long hole 32a of the operation plate 32 described above. The hook 38 is pivotally attached to the base plate 30 via a pin 40. The hook 38 is configured in this way.

  Finally, the memory ratchet 42 will be described. The memory ratchet 42 is a member formed in a substantially ring shape that relatively rotates the ratchet 54 of the left recliner 50 and the left side frame 22 of the back frame 20. The memory ratchet 42 is formed with the above-described concave groove 42a on the outer periphery thereof.

  The memory ratchet 42 is assembled so as to be sandwiched between the ratchet 54 of the left recliner 50 and the left side frame 22 of the back frame 20. At this time, the memory ratchet 42 is fastened to the ratchet 54 of the left recliner 50 and is assembled so as to be rotatable relative to the left side frame 22 of the back frame 20. It has been. The memory ratchet 42 is configured in this way.

  Further, an inner cable 60 b of the first operation cable 60 is hung between the operation lever 3 b and the operation plate 32. The first operation cable 60 has a double structure composed of an outer cable 60a formed in a substantially cylindrical shape and an inner cable 60b inserted into the outer cable 60a and formed in a wire shape. It is a cable.

  An outer cable 60a of the first operation cable 60 is hooked between a bracket (not shown) in the vicinity of the operation lever 3b and the first cut and raised piece 30a of the base plate 30. Thereby, when the operation lever 3b is operated, the operation plate 32 can be rotated.

  On the other hand, the inner cable 62 b of the second operation cable 62 is also hooked between the operation plate 32 and the operation bracket 76 of the right recliner 70. Similar to the first operation cable 60 described above, the second operation cable 62 includes an outer cable 62a formed in a substantially cylindrical shape, and an inner cable formed in the outer cable 62a. The cable 62b is a double-structured cable.

  Further, an outer cable 62a of the second operation cable 62 is hung between the third cut and raised piece 30c of the base plate 30 and the cut and raised piece 14a formed on the right lower arm 14. Accordingly, the operation bracket 76 of the right recliner 70 can be rotated by the rotation of the operation plate 32 accompanying the operation of the operation lever 3b. The memory lock mechanism M is configured in this way.

  Next, the operation of the reclining device R having the above-described configuration will be described with reference to FIGS. The reclining device R has a reclining function and a walk-in function. Hereinafter, the reclining function and the walk-in function will be described individually.

  First, the reclining function will be explained. In this description, the seat back 3 will be described from the normal posture. 4 and 5, the normal posture is a state in which the protrusion 38a of the hook 38 is engaged with the concave groove 42a of the memory ratchet 42 (this state is hereinafter referred to as “locked state of the memory lock mechanism M”). The pair of left and right recliners 50 and 70 are locked so that the seat back 3 has a desired inclination angle.

  6 and 7, when the operation knob 56 is operated to rotate the left release shaft 80, the left recliner 50 is switched from the locked state to the unlocked state. At this time, the rotation of the left release shaft 80 is transmitted to the right release shaft 82 via the connecting rod 84 (main shaft 86, clutch shaft 88).

  That is, the rotation of the left release shaft 80 is transmitted to the clutch shaft 88 through the main shaft 86. Due to this transmitted rotation, both protrusions 88b2 and 88b2 of the clutch shaft press against both flat portions 82a1 and 82a1 of the right release shaft 82. As a result, the rotation of the left release shaft 80 is caused by the connecting rod. 84 is transmitted to the right release shaft 82 (from the state shown in FIG. 14A to the state shown in FIG. 14B). Therefore, simultaneously with the switching of the left recliner 50, the right recliner 70 is also switched from the locked state to the unlocked state.

  As a result of this switching, the left and right side frames 22 and 24 of the seat back 3 can be rotated relative to the left and right lower arms 12 and 14 of the seat cushion 2. For example, reclining adjustment can be performed on the rearward tilt side (see FIGS. 8 and 9). The reclining function is configured in this way.

  Next, the walk-in function will be explained. This description will also be made from the time when the seat back 3 is in the normal posture. When the operation lever 3b is operated from this normal posture, as shown in FIGS. 10 and 11, the inner cable 60b of the first operation cable 60 is pulled by this operation force, so that it resists the biasing force of the tension spring 32b. The operation plate 32 rotates about the axis of the pin 36 (in the direction of arrow A in FIG. 10).

  Then, since the pole 34 also rotates together with the operation plate 32, the state where the pressing portion 34a of the pole 34 presses the hook 38 is eliminated. Even if the pressed state is completely eliminated, the operation plate 32 is still rotated by the pulling force of the inner cable 60b of the first operation cable 60, so that the guide pin 38b of the hook 38 remains on the operation plate 32. It is guided to the long hole 32a.

  As a result, the hook 38 rotates in the direction (arrow B direction in FIG. 10) in which the protrusion 38 a is disengaged from the concave groove 42 a of the memory ratchet 42. Therefore, the memory lock mechanism M is switched from the locked state to the unlocked state.

  In the description of the walk-in function, when the operation plate 32 is rotated around the axis of the pin 36, the inner cable 62b of the second operation cable 62 is pulled by the rotation, so that the operation bracket 76 is removed. Accordingly, the right release shaft 82 rotates. As a result, the right recliner 70 is also switched from the locked state to the unlocked state.

  With this switching, the left and right side frames 22 and 24 of the seat back 3 can rotate relative to the left and right lower arms 12 and 14 of the seat cushion 2 even when the left recliner 50 is in a locked state. Therefore, the seat back 3 can be switched from the normal posture to the forward inclined posture by a spiral spring (not shown) that biases the back frame 20 forward with respect to the cushion frame 10 (FIGS. 12 and 13). reference).

  At this time, as is apparent from FIG. 12, the protrusion 38 a of the hook 38 rides on the outer peripheral surface of the memory ratchet 42. Therefore, the unlocked state of the right recliner 70 is maintained. As described above, even if the right release shaft 82 rotates through the operation bracket 76, the two flat portions 82a1 of the right release shaft 82 do not press the projections 88b2 of the clutch shaft 88. Therefore, this rotation is not transmitted to the left release shaft 80 (from the state shown in FIG. 15A to the state shown in FIG. 15B).

  On the other hand, when the seat back 3 is raised from this forward inclined posture, the hook 38 is returned to the state in which the protrusion 38a is engaged with the concave groove 42a of the memory ratchet 42 (the memory lock mechanism M is in the unlocked state). Is returned to the locked state). As a result, the operating plate 32 is also returned to the pre-rotation state by the restoring force of the tension spring 32b, so that the pulling force of the inner cable 62b of the second operation cable 62 is also eliminated, and the right release shaft 82 is also rotated. Return to state. Therefore, the right recliner 70 is also returned from the unlocked state to the locked state.

  When returning in this way, the left recliner 50 remains in the locked state until the seat back 3 is returned from the forward leaning posture to the normal posture after switching the seat back 3 from the normal posture to the forward leaning posture. The angle of the returned seat back 3 will return to the angle before switching to the forward leaning posture. The walk-in function is configured in this way.

  The reclining device R according to the embodiment of the present invention is configured as described above. According to this configuration, the portion (clutch mechanism) that transmits the rotation from the clutch shaft 88 side to the right release shaft 82 and does not transmit the rotation from the opposite side is on the axis of these shafts 82 and 88. Is provided. For this reason, in the type where the recliner with a memory mechanism is only on one side as in the prior art, the lever constituting the clutch mechanism does not protrude in the radial direction of the rod, so the connecting part of one and the other reclining is compact. can do.

  Further, according to this configuration, the portion (clutch mechanism) that transmits the rotation from the clutch shaft 88 side to the right release shaft 82 and does not transmit the rotation from the opposite side is provided on both the shafts 82, 88. It is configured by inserting an end on one side into an end on the other side. Therefore, unlike the prior art, there is no need to weld the lever to the rod, and as a result, the assembly of the clutch mechanism can be improved.

The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In the embodiment, as an example of “seat cushion, seat back”, “seat cushion 2, seat back 3 of rear seat 1” has been described as an example. However, the present invention is not limited to this, and it may be “driver's seat or front passenger seat cushion, seat back”.

  In the embodiment, the example in which the clutch mechanism acts between the left release shaft 80 and the clutch shaft 88 has been described. However, conversely, a configuration in which the clutch mechanism acts between the right release shaft 82 and the clutch shaft 88 may be employed.

  Further, in the embodiment, when the rotation of the clutch shaft 88 is transmitted to the right release shaft 82, the two protrusions 88b2 formed on the clutch shaft 88 are two flat end portions 82a1 of the right release shaft 82, The example which presses 82a1 was demonstrated. However, the present invention is not limited to this, and a configuration in which pressing is performed at four locations may be employed.

2 Seat cushion 3 Seat back 50 Left recliner 60 Right recliner 80 Left release shaft 82 Right release shaft M Memory lock mechanism R Reclining device

Claims (1)

A pair of recliners that can be switched between a locked state that restricts tilting of the seat back relative to the seat cushion and an unlocked state that releases this restriction;
A memory lock mechanism capable of returning the seat back to the posture adjusted in angle before switching after switching the seat back adjusted in angle by the pair of recliners to the forward inclined posture;
When one recliner is switched from the locked state to the unlocked state, the other recliner can be switched from the locked state to the unlocked state by the rotation of the shaft member accompanying this switching,
A clutch mechanism is provided on the axis of the shaft member to prevent the rotation of the other recliner from being transmitted to one recliner even when the other recliner is switched from the locked state to the unlocked state. And
The shaft member
A first rod capable of switching one recliner from a locked state to an unlocked state, and a second rod capable of switching the other recliner from a locked state to an unlocked state;
The clutch mechanism
The tip of the first rod or the second rod is configured by being inserted into the tip of the second rod or the first rod,
When one of the insertion portions of these rods is rotated so that one recliner is in the unlocked state from the locked state, the rotation can be transmitted to the second rod. A reclining device characterized in that a cover for restricting the insertion is provided so as to be inserted into the recliner.

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