JP3604328B2 - Seat reclining structure - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
In the present invention, a swing arm that supports the seat back so as to be able to swing back and forth, and a lock device that fixes the swing arm in a desired swing posture are disposed on the fixed portion side, and the seat back includes The present invention relates to a seat reclining structure provided with an operating tool for releasing the locking of the swing arm by the lock device via a linkage mechanism.
[0002]
[Prior art]
Conventionally, a seat having the above-described seat reclining structure includes, as shown in FIG. 10, a locking device 26 disposed on a seat cushion 25 on the fixed portion side in the seat reclining structure, and a seat cushion 25. The seat back 28 is linked to an operating tool (not shown) provided on a seat back 28 connected to be able to swing back and forth through a swing arm 27 via a linking mechanism 29 including a linking rod or a linking wire. It was configured to be able to recline.
[0003]
[Problems to be solved by the invention]
By the way, when assembling a seat configured based on the above-described conventional technology in a vehicle, first, a seat cushion provided with a swing arm and a lock device is loaded into the vehicle and is mounted on a floor or a slide mechanism of the vehicle body. Attachment, then, carry the seat back into the vehicle and connect it to the swing arm, and then link the operating device provided on the seat back to the locking device on the seat cushion side by a link mechanism such as a link rod or a link wire. And so on must be performed in a narrow car, which makes it difficult to assemble the seat.
[0004]
Therefore, it is common practice to assemble the seat to a state where reclining operation is possible, then carry it into the car and assemble it on the floor of the car body or slide mechanism, etc. Since the seat is assembled from a narrow place such as a door opening, the seat is assembled so that it can be reclined, and it is bulky and heavy, so loading the seat into the car requires considerable labor. In particular, in a small car in which the opening of the door is narrow, the difficulty has become remarkable.
[0005]
An object of the present invention is to improve the workability when assembling a seat by making a simple improvement to a seat reclining structure.
[0006]
[Means for Solving the Problems]
〔Constitution〕
In order to achieve the above object, in the present invention, a swing arm for supporting the seat back so as to be able to swing back and forth and a lock device for fixing the swing arm in a desired swing posture are provided on the fixing portion side. Then, in a seat reclining structure in which an operating tool for releasing the locking of the swing arm by the lock device via a linkage mechanism is provided on the seat back, the linkage mechanism is disposed on the fixed portion side. The first mechanism section and the second mechanism section are provided in the seat back, and the first mechanism section and the second mechanism section are connected to each other with the connection of the seat back to the swing arm. Are configured to be linked.
[0007]
[Action]
According to the present invention, when assembling a seat to a vehicle body, first, a seat cushion, a swing arm, a lock device, a first mechanism of a link mechanism, and the like are loaded into the vehicle, and a floor or a slide mechanism of the vehicle is mounted. By attaching to the fixed part, it becomes the fixed part side, and then the seat back provided with the second mechanism part of the linkage mechanism is carried into the vehicle and connected to the swing arm, so that the seat back can be assembled in a state where reclining operation can be performed. Become like
[0008]
In other words, since the sheet is carried into the vehicle in a divided state, even in a small car in which the opening of the door serving as the entrance is narrow, it becomes possible to easily carry the sheet into the vehicle from the opening, In assembling after loading, by connecting the seat back to the swing arm, the operation tool on the seat back side and the lock device on the fixed portion side can release the locking of the swing arm by the lock device by the operation tool. Since the connection can be made in accordance with the state, the work of assembling the seat in the vehicle can be simplified.
[0009]
In particular, at the stage before the seat is carried into the vehicle, a lock device or a first mechanism of a link mechanism is assembled to the swing arm, or the first arm of the swing arm, the lock device and the link mechanism is attached to the seat cushion. By assembling the mechanism and the like, the work of assembling the seat in the vehicle can be simplified more effectively.
[0010]
〔effect〕
Therefore, the seat reclining structure is simply improved by forming the linkage mechanism into the two-part structure of the first mechanism part and the second mechanism part as described above, thereby improving workability when assembling the seat to the vehicle body. Can be improved.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
FIGS. 1 and 2 show a bench-type rear seat 1 disposed at the rear of a passenger car. The rear seat 1 is provided with a left and right seat back 4 on a seat cushion 3 connected to a floor 2 of a vehicle body. The left and right seatbacks 4 can be set to desired reclining postures and can be switched to the forward leaning posture by being connected via the corresponding reclining devices 5. Reference numeral 6 shown in FIGS. 1 and 2 is a cover that covers an exposed portion of the reclining device 5.
[0012]
As shown in FIGS. 2 to 7, each reclining device 5 includes a pair of left and right swing arms 7 that support the corresponding seat back 4 so as to be able to swing back and forth around the horizontal axis P <b> 1. A lock device 8 for fixing the rocking arm 7 in the desired swing posture in the reclining operation region on the rear side, an operating tool 10 for releasing the locking of the rocking arm 7 by the locking device 8 via the linking mechanism 9, and a rocking operation in the reclining operation region. It is composed of a spiral spring 11 for urging the moving arm 7 to swing forward. The swing arm 7, the lock device 8, and the spiral spring 11 are mounted on the seat cushion 3 that is on the fixed portion side in the seat reclining structure, and the operating tool 10 is the shoulder of the seat back 4 on the movable portion side in the seat reclining structure. Department has been deployed.
[0013]
As shown in FIGS. 3 to 8, each swing arm 7 is provided with a connecting portion 7 </ b> A connected to the back surface of the seatback 4, and the connecting portion 7 </ b> A is biased toward the seatback 4. A locking claw 7a extending toward the free end side of the swing arm 7 and two through holes 7b for bolt connection are formed. The locking claw 7a positions the seat back 4 with respect to the swing arm 7 by engaging with an engaging hole 4a formed in the plate 4A forming the back surface of the seat back 4. Is performed, the connecting bolts 12 are inserted into the respective through holes 7b and screwed into the screwing portions 4b provided on the plate 4A of the seatback 4, whereby the seatback 4 can be connected to the connecting portions 7A. It has become.
[0014]
As shown in FIGS. 3 to 9, the lock device 8 includes a base plate 13 bolted to the seat cushion 3, a movable plate 14 supported by the swing arm 7 so as to be able to swing around a horizontal axis P <b> 2, and a swing device. The swing arm 15 is supported by the moving arm 7 so as to swing around the horizontal axis P3. The base plate 13 supports the support shaft 16 fixed to the swing arm 7 so as to be rotatable around the horizontal axis P1, and has an upper edge 13A formed in an arc shape centered on the horizontal axis P1. In addition, a plurality of occlusal teeth 13a is formed at a rear portion of the upper edge portion 13A corresponding to the reclining operation area. The movable plate 14 includes a plurality of occlusal teeth 14a that mesh with the occlusal teeth 13a of the base plate 13, and swings around the horizontal axis P2 to mesh the occlusal teeth 14a with the occlusal teeth 13a. The position can be changed over the disengagement position where the engagement with the occluded tooth 13a is released. The swing member 15 is prevented from moving from the meshing position of the movable plate 14 by entering between the horizontal axis P3 which is the swing fulcrum and the contact portion 14A formed at the free end of the movable plate 14. Swing about the horizontal axis P3 over the tensioning posture and the tension releasing posture in which the free end faces the concave portion 14B formed in the movable plate 14 to allow the movable plate 14 to move to the disengagement position. Further, from the support plate 17 swinging integrally around the swing arm 7 and the horizontal axis P1 to the operated arm 18 swinging integrally around the swing member 15 and the horizontal axis P3. It is oscillated and urged in the tension direction by an erected urging spring 19.
[0015]
As shown in FIG. 9A, the tension of the swinging member 15 is such that the contact point between the movable plate 14 and the swinging member 15 and the horizontal axis P2, which is the swing fulcrum of the movable plate 14, are set. The line L2 connecting the contact point and the horizontal axis P3, which is the pivot of the swing member 15, is orthogonal to the connecting line L1. Further, as shown in FIG. 5, when the swing member 15 is in the tension releasing posture, the free end side of the swing member 15 contacts the rear edge of the concave portion 14B of the movable plate 14 to push up the movable plate 14. It has become.
[0016]
As shown in FIGS. 2 to 8, the linkage mechanism 9 includes an operated arm 18 supported by the swing arm 7, a crank arm 20 supported by the seat back 4 so as to be able to swing around the horizontal axis P <b> 4, and An operating tool 10 provided on the seat back 4 and a linking rod 21 erected over one free end of the crank arm 20, etc., and the other free end of the crank arm 20 is provided with an urging spring 19. A contact pin 20A which comes into contact with the operated arm 18 by the swing bias is provided, whereby the contact pin 20A on the seatback 4 side swings in conjunction with the lifting operation of the operating tool 10. The operated arm 18 on the arm 7 side is pressed in a direction against the urging of the urging spring 19. Reference numeral 4B shown in FIGS. 2 to 8 is a stopper pin provided on the seat back 4 so as to restrict swinging of the crank arm 20 by contact with the crank arm 20.
[0017]
That is, the link mechanism 9 includes a first mechanism section 9A including the operated arm 18 disposed on the seat cushion 3 side and a second mechanism including the crank arm 20 and the link rod 21 disposed on the seat back 4. The first mechanism part 9A and the second mechanism part 9B are in a state in which the operation mechanism 18 can be pressed by the contact pin 20A with the connection of the seat back 4 to the swing arm 7 in a two-part structure with the first part 9B. When the rear seat 1 is mounted on the floor 2, the swing arm 7, the lock device 8, the first mechanism 9 A of the linkage mechanism 9, and the like are provided. The loaded seat cushion 3 is first loaded into the vehicle and attached to the floor 2, and then the seat back 4 equipped with the second mechanism 9B of the linking mechanism 9 is loaded into the vehicle and the seat cushion 4 is loaded. The rear seat 1 can be mounted on the floor 2 in a state in which the reclining operation can be performed by a work procedure such as coupling to the swing arm 7 on the side. The work of carrying the rear seat 1 into the vehicle can be facilitated as compared with the case where the heavier rear seat 1 is carried into the vehicle, and the interior of the vehicle before the rear seat 1 is assembled into a state in which the reclining operation can be performed. Although it is not necessary to separately carry out a dedicated connection work for linking the operation device 10 on the seat back 4 side and the locking device 8 on the seat cushion 3 side in the vehicle, the rear seat assembling work in the vehicle can be simplified. It has become possible to plan.
[0018]
As shown in FIGS. 3 to 7, the spiral spring 11 has a center end 11 </ b> A locked on a support shaft 16 of the swing arm 7 and a state in which the swing arm 7 is located in a reclining operation area. The outer peripheral end 11B is received and supported by a locking pin 13B provided on the base plate 13 (see FIGS. 3 to 5), and when the swing arm 7 is operated to swing forward from the standing posture. The outer peripheral end 11B is separated from the locking pin 13B (see FIG. 6), whereby the spiral spring 11 swings the swing arm 7 forward only in the reclining operation area. It is designed to be energized.
[0019]
With the above configuration, in the reclining operation area, when the operating tool 10 provided on the seat back 4 is pulled up, the swinging member 15 is switched to the tension release posture against the swinging bias of the biasing spring 19. As a result, the movable plate 14 is positioned at the disengagement position (see FIG. 5), so that the seat back 4 is moved to a desired reclining posture by the urging force of the spiral spring 11 or a manual operation against the urging force. When the lifting operation of the operating tool 10 is released at the stage when the seat back 4 is swung to a desired reclining posture, the swinging member 15 is swung by the urging spring 19. Swings in the direction of the stretching posture, and the movable plate 14 moves to the meshing position, and the occlusal teeth 14 a are moved to the occlusal teeth 13 a of the base plate 13. And the rocking member 15 is switched to the tensioned position by the meshing, thereby preventing the movable plate 14 from moving from the meshing position [see FIGS. 3, 4, and 9 (a)]. The seat back 4 can be fixed in a desired reclining posture.
[0020]
Further, when switching the seat back 4 from the standing posture to the forward leaning posture, it is possible to avoid a sudden switch of the seat back 4 to the forward leaning posture due to the action of the spiral spring 11, and the seat back 4 is moved from the forward leaning posture to the standing posture. In order to switch the seat back 4, the seat back 4 can be switched to the standing posture only by applying an operating force against the weight of the seat back 4 to the seat back 4.
[0021]
As shown in FIG. 3 to FIG. 6 and FIG. An engagement recess 13b shallower than the engagement recess 13b is formed, so that the occlusal teeth 14a of the movable plate 14 reach the engagement recess 13b of the base plate 13 by changing the posture of the seat back 4 to the forwardly inclined posture. In addition, the swing member 15 swings in the direction of the tension posture by the swing bias of the biasing spring 19, and the swing causes the movable plate 14 to move in the meshing position direction to move the occlusal teeth 14 a of the base plate 13. The movable recess 14 is engaged with the engagement recess 13b, and the swing fulcrum P3 of the swing member 15 and the end of the contact portion 14A of the movable plate 14 on the recess 14B side are moved along with the engagement. Since the member 15 slightly bites into the tension state and suppresses the movement of the movable plate 14 toward the disengagement position, the engagement between the engagement recess 13b of the base plate 13 and the occlusal teeth 14a of the movable plate 14 is performed. Are held [see (c) in FIGS. 6 and 9].
[0022]
In other words, with the above configuration, the seat back 4 can be held in the forward leaning posture only by switching the seat back 4 from the upright posture to the forward leaning posture, so that the seat back 4 switched to the forward leaning posture is loose. The generation of abnormal noise can be prevented. Moreover, by making a simple improvement by simply forming the engagement recess 13b in the base plate 13, the base plate 13, the movable plate 14, the swinging member 15, the biasing spring 19, and the like, which are the components of the lock device 8, can be used. Since the holding mechanism 22 for holding the seat back 4 in the forward tilted posture can be configured, the configuration can be simplified and the manufacturing cost can be reduced.
[0023]
When the seat back 4 is assembled to the swing arm 7 on the seat cushion 3 side, as shown in FIGS. 6 and 8, the swing arm 7 is held by the holding mechanism 22 in the forward tilted position in advance. Then, when positioning the seatback 4 with respect to the swing arm 7 by engaging the engagement hole 4a of the seatback 4 with the locking claw 7a of the swing arm 7 from below the front, contact with the seatback 4 is performed. Therefore, it is possible to prevent the swing arm 7 from swinging rearward and to escape from the seat back 4, and in the positioning state, the through-hole 7 b of the swing arm 7 and the screwing portion of the seat back 4. 4b allows the connection between the swing arm 7 and the seat back 4 by screwing the connection bolt 12 from above, so that the workability when assembling the seat back 4 to the seat cushion 3 is improved. So that the attained the top.
[0024]
By the way, as shown in FIG. 6 and FIG. 9C, the state where the seat back 4 is held by the holding mechanism 22 in the forward leaning position is such that the swing support point P3 of the swing member 15 and the contact portion of the movable plate 14 are in contact with each other. In this state, the swing member 15 slightly bites between the end of the recess 14B and the end of the swing plate 14A, and the contact point between the movable plate 14 and the swing member 15 and the swing fulcrum P2 of the movable plate 14 The line L3 connecting the contact point and the pivot point P3 of the swing member 15 is in a semi-fixed state of the lock device 8 so that the line L4 intersects at an obtuse angle. )], The swinging fulcrum P3 of the swinging member 15 is brought into contact with the movable plate 14 by applying a swinging operation force to the seat back 4 to the rear side that is larger than the holding force of the holding mechanism 22. The concave portion 14B side of the portion 14A Since the swinging member 15, which is slightly biting between the ends and slightly biting, can be rocked in the direction of releasing the tension, the movable plate 14 can be moved to the releasing position. The holding of the seat back 4 in the forward leaning position can be released.
[0025]
In other words, with a simple operation of swinging the seat back 4 in the forward leaning position rearward, release of the holding of the seat back 4 in the forward leaning posture and switching from the forward leaning posture to the standing posture can be performed in a series. Has become.
[0026]
The engaging recess 13b of the base plate 13 is formed such that a stepped portion a where the occlusal teeth 14a of the movable plate 14 is hooked draws a smooth curve, whereby the holding mechanism 22 holds the engaging portion 13 in a forward tilted posture. When a rearward swing operation force larger than the holding force of the holding mechanism 22 is applied to the seat back 4 that is being moved, the movable plate 14 gradually climbs on the stepped portion a and the swing member 15 is urged to swing in the tension releasing direction, so that the holding mechanism 22 can smoothly release the holding of the seat back 4 in the forward leaning posture.
[0027]
[Another embodiment]
Hereinafter, other embodiments of the present invention will be listed.
{Circle around (1)} The seat to which the present invention is applied may be a separate rear seat 1 or a bench-type rear seat 1 in which the entire back of the seat back 4 is integrally reclined. The seat back 4 may be attached so as to be adjustable in the front-rear position via a mechanism, or the seat back 4 may be connected to the floor 2 or a slide mechanism via the reclining device 5 so as to be swingable back and forth. {Circle around (2)} As the link mechanism 9, a contact piece that comes into contact with the operated arm 18 by the swinging bias of the biasing spring 19 in place of the contact pin 20A is bent at the other free end of the crank arm 20. May be done.
(3) In the above embodiment, the seat back 4 is mounted while the swing arm 7 is held by the holding mechanism 22 in the forward tilted posture. The seat back 4 may be attached while being fixed in the moving posture.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a rear seat. FIG. 2 is a side view showing a configuration of a rear seat. FIG. 3 is a side view of a main part showing a configuration of a reclining device. FIG. 4 is a view for fixing a seat back in a desired reclining posture. FIG. 5 is a side view of a main part showing a state in which the seat back is released from being fixed in a desired reclining posture. FIG. 6 is a main part showing a state in which the seat back is held in a forward leaning posture. FIG. 7 is a rear view of a main portion showing a configuration of a reclining device and a connection configuration of a swing arm and a seat back. FIG. 8 is a side view of a rear seat showing a state before a seat back is connected to a swing arm. 9A is a side view of a main part of the locking device in a state where the seat back is fixed. FIG. 9B is a side view of a main part of the locking device in a state where the seat back is fixed. Side view of the rear seat showing the connecting structure of the swing arm and the seat back side view of a main part showing a state in FIG. 10 conventional linkage mechanism EXPLANATION OF REFERENCE NUMERALS
4 Seat back 7 Swing arm 8 Lock device 9 Linkage mechanism 9A First mechanism 9B Second mechanism 10 Operating tool

Claims (1)

A swing arm that supports the seat back so as to be able to swing back and forth, and a lock device that fixes the swing arm in a desired swing posture are provided on the fixed part side, and the seat back is provided with the lock device. In the seat reclining structure provided with an operation tool for releasing the fixing of the swing arm through a linkage mechanism,
The linking mechanism has a two-part structure of a first mechanism disposed on the fixed portion side and a second mechanism disposed on the seatback, and is used for connecting the seatback to the swing arm. Accordingly, a seat reclining structure in which the first mechanism and the second mechanism are linked to each other.

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