JP6421020B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat installed in various vehicles such as an aircraft, a railway vehicle, a bus, and a ship, and more particularly to a vehicle seat provided with an armrest.

  Airplane passages are used when passengers get on and off, and when crews provide services to each seat. Basically, both passengers and crew are seated, so only a minimum width is secured. Usually it is not done. On the other hand, some passengers need a wheelchair to move, so some seats should be equipped with a mechanism to facilitate getting on and off the wheelchair. Is also necessary.

  Specifically, a passenger who has moved to the side or front of a predetermined seat in a wheelchair positions the side or front, and sits by parallel movement from the wheelchair to the seat. In the case, the armrest of the seat becomes an obstacle. For this reason, some seats are provided with a retracting function for retracting an armrest to a position that does not hinder seating for wheelchair users. As the retracting function, usually, a method of jumping up the armrest upward is often employed.

  On the other hand, high-grade seats often use high-quality box-shaped armrests. However, since a box-shaped armrest usually has a large weight and volume, it is difficult to have a configuration in which the box-shaped armrest is flipped upward. Therefore, it is necessary to increase the seat pitch so that a passenger who needs a wheelchair can sit from the front of the seat. Therefore, it is difficult to apply a box-shaped armrest to an aircraft with a narrow seat pitch, such as an aircraft on a domestic flight. Therefore, there is a need for a retraction mechanism technique that can be adopted even with a box-shaped armrest. And actually, there exist some which are shown to the following prior art examples 1-3 about such a technique.

[Conventional example 1]
The vehicle seat 70 of the prior art example 1 (Patent Document 1) shown in FIG. 9 is designed to seat a passenger who needs a wheelchair by flipping up a box-shaped armrest 73 around a rotating shaft 74 at the rear end. To make it easier. Specifically, as shown in FIG. 9a, the armrest 73 is normally fixed at the normal position by the lock mechanism under the seat surface 71s, but the lock is released by the operation button 75 at the front end of the armrest 73. The jumping up operation is possible. Then, as shown in FIG. 9b, by rotating the armrest 73 to a predetermined angle, the position of the armrest 73 is held by its own weight. The armrest 73 is provided with a recess (not shown) for lifting from the inside, and can be rotated by passengers and crew.

[Conventional example 2]
A vehicle seat 80 of Conventional Example 2 (Patent Document 2) shown in FIG. 10 facilitates the seating of a passenger who needs a wheelchair by translating a box-shaped armrest 83 downward. Specifically, guide rails 84 and 84 are provided on the side of the seat 81 so that the armrest 83 can be translated in the vertical direction, and the armrest 83 is disposed there. When a passenger who needs a wheelchair gets on and off, as shown in FIG. 10 b, the armrest 83 is pushed down along the guide rails 84, 84 so that the seat surface 81 s and the upper surface 83 s of the armrest 83 are equal in height. Therefore, transfer from the horizontal direction becomes easy.

[Conventional Example 3]
A vehicle seat 90 of Conventional Example 3 (Patent Document 3) shown in FIG. 11 rotates and moves a box-shaped armrest 93 in a direction in which the front part descends obliquely downward about a rotation shaft 94 at the rear end. This facilitates seating for passengers who need a wheelchair. Specifically, the box-shaped armrest 93 has a rotation shaft 94 in the vicinity of the backrest 92. Then, after releasing the lock, as shown in FIG. 11b, the entire armrest 93 is rotated about the rotation shaft 94 in the direction in which the front part is lowered in the obliquely downward direction. The space for getting on and off is expanded, and the seating becomes easy.

JP 2012-249683 A JP-A-6-156393 (Patent No. 2689059) JP-A-6-156129 (Patent No. 2745180)

  However, in the conventional examples 1 to 3, the degree of freedom in designing the armrest is low for the following reasons, and therefore, the armrest cannot be given a high-class feeling.

  That is, first of all, in the conventional examples 1 to 3, the entire box-shaped armrests 73, 83, and 93 are moved (rotated or translated in the vertical direction), so that a load to be applied when moving is increased. End up. For this reason, in consideration of labor and safety when moving the armrests 73, 83, 93, it is necessary to lightly finish the entire armrests 73, 83, 93. Furthermore, in the conventional examples 1 and 3, since it is necessary to reinforce the rotating shafts 74 and 94 as the weight of the armrests 73 and 93 increases, it is appropriate to make the armrests 73 and 93 light. Considering the weight reduction of the armrests 73, 83, and 93, the applicable material is almost limited to the resin, and the restriction on the texture becomes obvious. Therefore, the armrest cannot be given a high-class feeling in terms of weight and material (texture).

  Secondly, in the conventional examples 2 and 3, the armrests 83 and 93 are pushed downward or obliquely downward, so that a space is required below the armrests 83 and 93. Therefore, the armrests 83 and 93 cannot be formed into a design shape that extends to the floor or near the floor. Therefore, the armrest cannot be given a high-class feeling even in terms of the length in the downward direction.

  Accordingly, it is an object of the present invention to provide a high-class feeling as needed by increasing the degree of freedom in design while allowing the box-shaped armrest to be retracted to a position that does not hinder seating.

In order to achieve the above object, the vehicle seat of the present invention is configured as follows. That is, the vehicle seat of the present invention includes a seat, a backrest, and an armrest, and the armrest is a box formed of an upper part having an elbow rest surface and a lower part extending downward from the seat surface. A shape armrest,
The upper part and the lower part are connected by a hinge. The upper part can be translated in the front-rear direction and can be hinged from a normal position on the lower part to a folded position on the outer side of the lower part. The folding position is below the outside of the intermediate position at the front or rear of the normal position ,
The fixing device is provided with an operation unit, and the fixing device is normally in a fixed state by fixing the upper part to a normal position by restraining the parallel movement and the rotation so as to be impossible. When operated , the fixed part is released by releasing the restriction of the parallel movement, so that the upper part can be translated from the normal position to the intermediate position, and the upper part is in the intermediate position. When the upper part is disposed on the upper part, the upper part can be rotated from the intermediate position to the folded position by releasing the rotation restriction .

  However, the “box shape” here indicates a shape viewed from the outside, and does not indicate that there is a hollow inside. The hollow may or may not be present.

  According to the present invention, by moving the upper part of the box-shaped armrest to the folding position, the armrest can be retracted to a position that does not hinder seating. Therefore, a passenger who needs a wheelchair easily moves to the vehicle seat from the side.

  At this time, in order to move only the upper part to the folding position, the load to be applied when moving compared to the conventional examples 1 to 3 in which the entire box-shaped armrest is moved (rotated or translated in the vertical direction). Becomes smaller. Therefore, the entire box-shaped armrest can be designed to be heavier than the conventional examples 1 to 3. Therefore, the degree of freedom in designing in terms of weight increases. Moreover, since it becomes applicable also with a heavy material, the freedom degree in a material surface also goes up. Therefore, for example, a box-shaped armrest can be made into a heavy-weight design shape or a high-quality material (texture), thereby giving the armrest a high-class feeling.

Also, in order to move the upper part to the folding position on the outer side of the lower part, unlike the conventional examples 2 and 3 in which the box-shaped armrest is moved downward or obliquely downward, a space is required below the armrest. do not do. For this reason, the degree of freedom in design also increases in terms of the downward length of the armrest. Therefore, for example, an armrest can be made into the design shape extended to a floor or the floor vicinity, and, thereby, can give a high-class feeling to an armrest.
Furthermore, since the upper part does not rotate to the folding position unless it is translated from the normal position to the intermediate position, an erroneous operation in which the passenger inadvertently turns the upper part to the folding position. Is hard to get up.

It is a perspective view which shows the vehicle seat of an Example. It is a perspective view which shows the armrest of the vehicle seat of an Example. In the vehicle seat of the embodiment, a is a perspective view showing a state in which the backrest is erected in a normal fixed state, and b is a perspective view showing a state in which the backrest is tilted in a normal fixed state. In the armrest of the vehicle seat of the embodiment, c is a perspective view showing a state in which the upper part is arranged at an intermediate position, and d is a perspective view showing a state in which the upper part is arranged at a folding position. In the armrest of the vehicle seat of the embodiment, b is a plan view showing a normal fixed state, c is a plan view showing a state in which the upper part is arranged at an intermediate position, and d is a state in which the upper part is arranged in a folding position. FIG. In the fixing portion of the vehicle seat fixing device of the embodiment, b is a side sectional view showing a normal fixing state (a view of VIb-VIb cross section shown in FIG. 5), and c is a state in which the upper part is arranged at an intermediate position. FIG. 6 is a side sectional view (a view of a VIc-VIc cross section shown in FIG. 5). In the armrest of the vehicle seat of the embodiment, c is a front sectional view showing a state in which the upper part is arranged at an intermediate position (a view of the VIIc-VIIc cross section shown in FIG. 5), and d is an upper part arranged in the folding position. FIG. 7 is a front cross-sectional view showing the state of being done (the view of the VIId-VIId cross section shown in FIG. 5). It is a front view which shows a mode when the passenger who requires a wheelchair sits in the vehicle seat of an Example. In the vehicle seat of Conventional Example 1, a is a perspective view showing a normal state, and b is a perspective view showing a state in which an armrest is flipped up. In the vehicle seat of Conventional Example 2, a is a perspective view showing a normal state, and b is a perspective view showing a state in which an armrest is translated downward. In the vehicle seat of Conventional Example 3, a is a side view showing a normal state, and b is a side view showing a state where an armrest is rotated in a diagonally downward direction.

  The position of the operation unit is not particularly limited, but is preferably the following mode in that the operation unit does not deteriorate the appearance of the vehicle seat. In other words, the operation unit is a position between the backrest and the armrest, and is disposed at a position that fits behind the front surface of the backrest at least in a state where the backrest is raised to the maximum.

  Although the design shape of an armrest is not specifically limited, It is preferable that it is the following aspect at the point by which the appearance of an armrest does not worsen by a division | segmentation location. That is, the armrest is an aspect in which the upper part has a design shape including a protrusion-like concealing part concealing the division part of the upper part and the lower part at the lower end portion of the outer side surface in the normal fixing state.

  The height of the armrest in a state where the upper part is arranged at the folding position is not particularly limited, but is preferably the following mode in that a passenger who needs a wheelchair can easily get on and off. That is, in a state where the upper part is arranged at the folding position, all of the upper part, the lower part, and the hinge are within the height of the seating surface.

The operation unit of the fixing device is not particularly limited, but the following configurations c and d are exemplified. However, the aspect d is preferable in that an erroneous operation such that a passenger carelessly operates the operation unit to release the fixation is less likely to occur.
[C] A mode in which the fixing device is configured to release the fixing when the operation unit is raised in the normal fixing state and the operation unit is pushed down.
[D] A mode in which the fixing device is configured to release the fixing when the operation unit is lowered in the normal fixing state and the operation unit is pushed up.

  The vehicle seat 1 of this embodiment shown in FIGS. 1 to 8 is a seat installed in an aircraft, and includes a seat portion 10, a backrest 20, an armrest 30, and a fixing device 49. . The vehicle seat 1 can also be implemented as a seat installed in various vehicles (railcars, buses, ships, etc.) other than aircraft.

[Seat 10 and back 20]
The seat part 10 is a normal seat part, and is provided with a seat surface 10s on the upper surface. The backrest 20 is also a normal backrest, and is configured to be tiltable by operating a tilting lever (not shown).

[Armrest 30]
The armrest 30 has a box shape formed of an upper part 31 having an elbow rest surface 32 and a lower part 36 extending downward from the seat surface 10s. The upper part 31 and the lower part 36 are connected by a hinge 41. Therefore, the upper part 31 is movable by the hinge 41 from the normal position P1 on the lower part 36 to the folding position P3 on the outer side of the lower part 36. Specifically, the upper part 31 is configured to be able to translate in the front-rear direction and to be turned by a hinge 41 to the side. And the folding position P3 exists in the downward direction of the outer side of the intermediate position P2 ahead of the normal position P1.

  Specifically, an upper center concave portion 34 is formed in the central portion of the dividing surface 31 s of the upper part 31. An upper shaft 35 extending in the front-rear direction is installed in the upper central recess 34. Further, a lower central concave portion 37 is provided in the central portion of the dividing surface 36 s of the lower part 36. A lower shaft 38 extending in the front-rear direction is installed in the lower central recess 37. The upper shaft 35 and the lower shaft 38 are connected by a hinge 41.

  The hinge 41 includes a first link 42 and a second link 44. The first link 42 is a plate-like link having an L shape when viewed from the front, and one end of the first link 42 is attached to the lower shaft 38 so as to be slidable in the front-rear direction and rotatable in the circumferential direction. The second link 44 is a plate-like link, and one end thereof is rotatably connected to the other end of the first link 42 via a connecting shaft 43. The other end of the second link 44 is rotatably attached to the upper shaft 35. The hinge 41 is housed in a space formed by the upper central concave portion 34 and the lower central concave portion 37 in the normal fixed state.

  The armrest 30 has a design shape provided with a ridge-shaped concealing portion 33 that conceals the dividing portion D of the upper part 31 and the lower part 36 at the lower end portion of the outer side surface of the upper part 31 in the normal fixing state. doing. In the state in which the upper part 31 is arranged at the folding position P3, the upper part 31, the lower part 36, and the hinge 41 are all within the height of the seat surface 10s.

[Fixing device 49]
The fixing device 49 includes an operation unit 55a. Then, normally, the upper part 31 is fixed to the normal position P1 to obtain the normal fixing state. Specifically, the fixing is performed by restricting the parallel movement (parallel movement of the upper part 31 in the front-rear direction) and the rotation (rotation of the upper part 31 to the side) to be impossible.

  And when the operation part 55a is operated, the said upper part 31 is made into a movable state by canceling | releasing the said fixation. Specifically, the operation portion 55a is pushed up by a passenger, a crew, or the like in either the state where the backrest 20 stands up as shown in FIG. 3a or the state where the backrest 20 falls down as shown in FIG. 3b. When operated, the fixing device 49 releases the fixing by releasing the restriction of the parallel movement. As a result, a parallel movable state, which is one of the movable states, is set. The parallel movable state is a state in which the upper part 31 can translate from the normal position P1 to the intermediate position P2. Further, when the upper part 31 is arranged at the intermediate position P2 by a passenger, a crew or the like as shown in FIG. 4C, the fixing device 49 releases the restriction of the rotation, thereby separating the movable state. It is set to a rotatable state which is one of the states. The pivotable state is a state in which the upper part 31 can pivot from the intermediate position P2 to the folding position P3. Further, when the upper part 31 is arranged at the folding position P3 by a passenger or a crew as shown in FIG. 4D, the height of the armrest 30 is lowered.

  Specifically, the fixing device 49 includes a parallel movement restricting portion 50 that restricts the parallel movement and a rotation restricting portion 60 that restricts the rotation.

  The translational movement restraining part 50 is composed of a fixing protrusion 51 and a fixing part 52. The fixing protrusion 51 is a protrusion protruding inward (backrest 20 side direction) from the rear portion of the inner side surface (side surface on the backrest 20 side) of the upper part 31 in the normal fixing state. Further, the fixing portion 52 is located between the backrest 20 and the armrest 30, and at least in a state where the backrest 20 is raised to the maximum extent, it is disposed at a position that fits behind the front surface 20 s of the backrest 20. The fixing portion 52 includes a substrate 53 extending in the vertical direction and the front-rear direction, and an operation mechanism 54 installed in the internal space 53 a of the substrate 53. The lower part of the substrate 53 is fixed to the upper part of the lower part 36. A fixing recess 53b is formed in the upper portion of the substrate 53. The fixing recess 53b is recessed backward from the front end. In the normal fixing state, the fixing protrusion 51 is disposed inside the fixing recess 53b.

  The operation mechanism 54 includes an operation lever 55, a first spring 56, a second spring 57, and a latch 58. The operation lever 55 is rotatably supported at its intermediate portion in the longitudinal direction by the support shaft 55 e in the internal space 53 a of the substrate 53. One end portion of the operation lever 55 protrudes in front of the substrate 53 from the internal space 53a. One end thereof constitutes the operation unit 55a. The operation portion 55a is lowered in the normal fixed state by the urging force of the first spring 56, and is configured to release the fixation when pushed up.

  The latch 58 is a member for restraining the fixing protrusion 51 inside the fixing recess 53b so as not to move forward in the normal fixing state. The latch 58 is installed above the other end 55f of the operation lever 55, and a second spring 57 is interposed between the latch 58 and the other end 55f. As shown in FIG. 6b, in a state where the operation portion 55a is lowered and the other end portion 55f is raised, the latch 58 is disposed at a position to close the opening at the front end of the fixing recess 53b. On the other hand, as shown in FIG. 6c, when the operation portion 55a is pushed up and the other end portion 55f is lowered, it sinks together with the second spring 57 by its own weight and closes the opening at the front end of the fixing recess 53b. It is arranged at the position where there is no. The front end of the upper portion of the latch 58 is provided with an inclined portion 58a that recedes from the front to the rear as it goes from below to above. Therefore, when the upper part 31 is returned to the normal position P1, the upper part 31 is merely moved backward from the intermediate position P2 without pushing up the operation part 55a. In cooperation, the latch 58 is automatically pushed downward so that the upper part 31 can be translated to the normal position P1.

  The rotation restricting portion 60 restricts the rotation to be impossible when the upper part 31 is disposed at the normal position P1, and restricts the rotation when the upper part 31 is disposed at the intermediate position P2. It is configured to cancel. Specifically, the rotation restricting portion 60 includes restricting protrusions 64 and 64 projecting from the upper part 31 and restraining grooves 67 and 67 recessed from the lower part 36.

  The restraining protrusions 64 and 64 are protrusions protruding from the dividing surface 31 s of the upper part 31, and specifically, one protrusion is provided on each of the front and rear sides of the upper central recess 34. And the protrusion side return parts 65 and 65 which protruded in the both sides are formed in the front-end | tip part of each restraining protrusion 64. As shown in FIG.

  The constraining groove 67 is a groove provided in the dividing surface 36 s of the lower part 36, and specifically, one is provided on each of the front and rear sides of the lower central recessed part 37. Each restricting groove 67 is longer than the restricting protrusion 64 in the front-rear direction. Then, on both inner side surfaces of the rear portion of the opening at the upper end of each restraining groove 67, groove-side turn-back portions 68, 68 projecting inward are provided. Then, in a state where the upper part 31 is disposed at the normal position P1, the protrusion side return portions 65 and 65 abut against the groove side return portions 68 and 68, thereby restraining the rotation. On the other hand, when the upper part 31 is translated from the normal position P1 to the intermediate position P2, the protrusion-side return portions 65 and 65 do not contact the groove-side return portions 68 and 68, thereby releasing the rotation restriction. To do.

According to the present embodiment, the following effects A to I can be obtained.
[A] By moving the upper part 31 to the folding position P3, the armrest 30 can be lowered and retracted to a position that does not hinder seating. Therefore, as shown in FIG. 8, a passenger H who needs a wheelchair easily moves on the seat 10 from the side of the vehicle seat 1.

[B] Since only the upper part 31 is moved to the folding position P <b> 3, the load to be applied when moving is smaller than when the entire box-shaped armrest 30 is moved. Therefore, the entire box-shaped armrest 30 can be designed to be heavy. Therefore, the degree of freedom in designing in terms of weight increases. Moreover, since it becomes applicable also with a heavy material, the freedom degree of the design in a material surface also goes up. Therefore, the box-shaped armrest 30 can be made into a heavy-weight design shape or a high-quality material (texture), and the armrest 30 can have a high-class feeling.

[C] Since the upper part 31 is moved to the folding position P3 on the outer side of the lower part 36, a space is not required below the armrest 30, unlike the case where the armrest 30 is moved downward. For this reason, the degree of freedom in design also increases in terms of the downward length of the armrest 30. Therefore, the armrest 30 can be made into the design shape extended to the floor or near the floor, and the armrest 30 can be given a high-class feeling by doing so.

[D] Since the entire upper part 31 is moved to the folding position P3, the entire area from the front end to the rear end of the armrest 30 is lowered. Therefore, all of the front and rear directions of the side surface of the vehicle seat 1 can be used when getting on and off.

[E] At least in the state where the backrest 20 is raised to the maximum extent, the operation portion 55a is located behind the front surface 20s of the backrest 20, so that the operation portion 55a is hidden behind the backrest 20 and is difficult to see. Therefore, it looks good in design.

[F] Since the armrest 30 has a design shape having a ridge-shaped concealing portion 33 at the lower end portion of the upper part 31, in the normal fixed state, from the eyes of the passenger coming obliquely above the division point D The divided portion D is difficult to see because it is hidden behind the concealing portion 33. Therefore, it looks good in design.

[G] In the state in which the upper part 31 is arranged at the folding position P3, all of the upper part 31, the lower part 36, and the hinge 41 are within the height of the seating surface 10s. , 36 and 41 do not get in the way.

[H] The fixing device 49 releases the fixation when the operation unit 55a is pushed up, so that the passenger inadvertently releases the fixation compared to the case where the fixation is released when the operation unit 55a is pushed down. It is difficult for misoperation to occur.

[I] Since the upper part 31 does not rotate to the folding position P3 unless it has been translated from the normal position P1 to the intermediate position P2 in front of it, the passenger carelessly folds the upper part 31. An erroneous operation such as turning to the tatami position P3 is unlikely to occur.

  In addition, this invention is not limited to the said Example, It can also implement by changing arbitrarily the structure and shape of each part in the range which does not deviate from the meaning of invention.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 10 Seat 10s Seat surface 20 Back 20s Front 30 Armrest 31 Upper part 32 Elbow rest surface 33 Concealment part 36 Lower part 41 Hinge 49 Fixing device 55a Operation part P1 Normal position P2 Intermediate position P3 Folding position D Dividing part

Claims (5)

A seat (10), a backrest (20),
The armrest (30) is formed of an upper part (31) having an armrest surface (32) and a lower part (36) extending downward from the seating surface (10s). A box-shaped armrest (30),
The upper part (31) and the lower part (36) are connected by a hinge (41), and the upper part (31) can be translated in the front-rear direction and is in a normal position above the lower part (36). From (P1) to the folding position (P3) on the outer side of the lower part (36), the hinge (41) is configured to be rotatable, and the folding position (P3) is the normal position (P1). Below the outer side of the intermediate position (P2) at the front or rear ,
A fixing device (49) including an operation unit (55a) is provided, and the fixing device (49) normally restricts the parallel movement and the rotation so that the normal position (P1) of the upper part (31). When the operation portion (55a) is operated , the upper part (31) is in the normal position by releasing the fixation by releasing the constraint of the parallel movement when the operation portion (55a) is operated. By disengaging the rotation constraint when the upper part (31) is arranged at the intermediate position (P2), and the upper part (31) is arranged at the intermediate position (P2). A vehicle seat having a configuration in which the upper part (31) can rotate from the intermediate position (P2) to the folding position (P3) . The operation portion (55a) is located between the backrest (20) and the armrest (30), and at least in the state where the backrest (20) is raised up to the maximum, it is more than the front surface (20s) of the backrest (20). The vehicle seat according to claim 1 , wherein the vehicle seat is disposed at a position that fits rearward. The armrest (30) is a ridge-like shape that conceals the division part (D) of the upper part (31) and the lower part (36) at the lower end portion of the outer surface of the upper part (31) in the normally fixed state. The vehicle seat according to claim 1 or 2, which has a design shape provided with a concealing portion (33). In a state where the upper part (31) is arranged at the folding position (P3), all of the upper part (31), the lower part (36), and the hinge (41) are below the height of the seating surface (10s). The vehicle seat according to any one of claims 1 to 3 , which fits. Locking device (49) is normally operating part in a fixed state is lowered (55a), the fixing is configured to release the claim 1 when the operation unit (55a) is pushed up Vehicle seats as described in.

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